242 files changed, 6259 insertions, 4982 deletions

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 0118d67221b2..3d283abf67d7 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -60,11 +60,6 @@ do {							\
                 current->pid, __func__, ##args);        \
 } while (0)
 
-struct rehash_entry {
-        struct task_struct *task;
-        struct list_head list;
-};
-
 /* Unified info structure.  This is pointed to by both the dentry and
    inode structures.  Each file in the filesystem has an instance of this
    structure.  It holds a reference to the dentry, so dentries are never
@@ -81,7 +76,6 @@ struct autofs_info {
 
         struct list_head active;
         int active_count;
-        struct list_head rehash_list;
 
         struct list_head expiring;
 
@@ -104,7 +98,6 @@ struct autofs_info {
 #define AUTOFS_INF_EXPIRING     (1<<0) /* dentry is in the process of expiring */
 #define AUTOFS_INF_MOUNTPOINT   (1<<1) /* mountpoint status for direct expire */
 #define AUTOFS_INF_PENDING      (1<<2) /* dentry pending mount */
-#define AUTOFS_INF_REHASH       (1<<3) /* dentry in transit to ->lookup() */
 
 struct autofs_wait_queue {
         wait_queue_head_t queue;
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index 00bf8fcb245f..c8a80dffb455 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -544,10 +544,9 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp,
                         goto out;
                 devid = new_encode_dev(path.mnt->mnt_sb->s_dev);
                 err = 0;
-                if (path.dentry->d_inode &&
-                    path.mnt->mnt_root == path.dentry) {
+                if (path.mnt->mnt_root == path.dentry) {
                         err = 1;
-                        magic = path.dentry->d_inode->i_sb->s_magic;
+                        magic = path.mnt->mnt_sb->s_magic;
                 }
         } else {
                 dev_t dev = sbi->sb->s_dev;
@@ -560,10 +559,8 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp,
 
                 err = have_submounts(path.dentry);
 
-                if (path.mnt->mnt_mountpoint != path.mnt->mnt_root) {
-                        if (follow_down(&path))
-                                magic = path.mnt->mnt_sb->s_magic;
-                }
+                if (follow_down(&path))
+                        magic = path.mnt->mnt_sb->s_magic;
         }
 
         param->ismountpoint.out.devid = devid;
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 74bc9aa6df31..a796c9417fb1 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -279,7 +279,6 @@ struct dentry *autofs4_expire_direct(struct super_block *sb,
                         root->d_mounted--;
                 }
                 ino->flags |= AUTOFS_INF_EXPIRING;
-                autofs4_add_expiring(root);
                 init_completion(&ino->expire_complete);
                 spin_unlock(&sbi->fs_lock);
                 return root;
@@ -407,7 +406,6 @@ found:
                 expired, (int)expired->d_name.len, expired->d_name.name);
         ino = autofs4_dentry_ino(expired);
         ino->flags |= AUTOFS_INF_EXPIRING;
-        autofs4_add_expiring(expired);
         init_completion(&ino->expire_complete);
         spin_unlock(&sbi->fs_lock);
         spin_lock(&dcache_lock);
@@ -435,7 +433,7 @@ int autofs4_expire_wait(struct dentry *dentry)
 
                 DPRINTK("expire done status=%d", status);
 
-                if (d_unhashed(dentry) && IS_DEADDIR(dentry->d_inode))
+                if (d_unhashed(dentry))
                         return -EAGAIN;
 
                 return status;
@@ -475,7 +473,6 @@ int autofs4_expire_run(struct super_block *sb,
         spin_lock(&sbi->fs_lock);
         ino = autofs4_dentry_ino(dentry);
         ino->flags &= ~AUTOFS_INF_EXPIRING;
-        autofs4_del_expiring(dentry);
         complete_all(&ino->expire_complete);
         spin_unlock(&sbi->fs_lock);
 
@@ -506,7 +503,6 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
                         ino->flags &= ~AUTOFS_INF_MOUNTPOINT;
                 }
                 ino->flags &= ~AUTOFS_INF_EXPIRING;
-                autofs4_del_expiring(dentry);
                 complete_all(&ino->expire_complete);
                 spin_unlock(&sbi->fs_lock);
                 dput(dentry);
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index d0a3de247458..821b2b955dac 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -49,7 +49,6 @@ struct autofs_info *autofs4_init_ino(struct autofs_info *ino,
                 ino->dentry = NULL;
                 ino->size = 0;
                 INIT_LIST_HEAD(&ino->active);
-                INIT_LIST_HEAD(&ino->rehash_list);
                 ino->active_count = 0;
                 INIT_LIST_HEAD(&ino->expiring);
                 atomic_set(&ino->count, 0);
@@ -97,63 +96,6 @@ void autofs4_free_ino(struct autofs_info *ino)
         kfree(ino);
 }
 
-/*
- * Deal with the infamous "Busy inodes after umount ..." message.
- *
- * Clean up the dentry tree. This happens with autofs if the user
- * space program goes away due to a SIGKILL, SIGSEGV etc.
- */
-static void autofs4_force_release(struct autofs_sb_info *sbi)
-{
-        struct dentry *this_parent = sbi->sb->s_root;
-        struct list_head *next;
-
-        if (!sbi->sb->s_root)
-                return;
-
-        spin_lock(&dcache_lock);
-repeat:
-        next = this_parent->d_subdirs.next;
-resume:
-        while (next != &this_parent->d_subdirs) {
-                struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child);
-
-                /* Negative dentry - don`t care */
-                if (!simple_positive(dentry)) {
-                        next = next->next;
-                        continue;
-                }
-
-                if (!list_empty(&dentry->d_subdirs)) {
-                        this_parent = dentry;
-                        goto repeat;
-                }
-
-                next = next->next;
-                spin_unlock(&dcache_lock);
-
-                DPRINTK("dentry %p %.*s",
-                        dentry, (int)dentry->d_name.len, dentry->d_name.name);
-
-                dput(dentry);
-                spin_lock(&dcache_lock);
-        }
-
-        if (this_parent != sbi->sb->s_root) {
-                struct dentry *dentry = this_parent;
-
-                next = this_parent->d_u.d_child.next;
-                this_parent = this_parent->d_parent;
-                spin_unlock(&dcache_lock);
-                DPRINTK("parent dentry %p %.*s",
-                        dentry, (int)dentry->d_name.len, dentry->d_name.name);
-                dput(dentry);
-                spin_lock(&dcache_lock);
-                goto resume;
-        }
-        spin_unlock(&dcache_lock);
-}
-
 void autofs4_kill_sb(struct super_block *sb)
 {
         struct autofs_sb_info *sbi = autofs4_sbi(sb);
@@ -170,15 +112,12 @@ void autofs4_kill_sb(struct super_block *sb)
         /* Free wait queues, close pipe */
         autofs4_catatonic_mode(sbi);
 
-        /* Clean up and release dangling references */
-        autofs4_force_release(sbi);
-
         sb->s_fs_info = NULL;
         kfree(sbi);
 
 out_kill_sb:
         DPRINTK("shutting down");
-        kill_anon_super(sb);
+        kill_litter_super(sb);
 }
 
 static int autofs4_show_options(struct seq_file *m, struct vfsmount *mnt)
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 30cc9ddf4b70..a015b49891df 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -104,99 +104,6 @@ static void autofs4_del_active(struct dentry *dentry)
         return;
 }
 
-static void autofs4_add_rehash_entry(struct autofs_info *ino,
-                                     struct rehash_entry *entry)
-{
-        entry->task = current;
-        INIT_LIST_HEAD(&entry->list);
-        list_add(&entry->list, &ino->rehash_list);
-        return;
-}
-
-static void autofs4_remove_rehash_entry(struct autofs_info *ino)
-{
-        struct list_head *head = &ino->rehash_list;
-        struct rehash_entry *entry;
-        list_for_each_entry(entry, head, list) {
-                if (entry->task == current) {
-                        list_del(&entry->list);
-                        kfree(entry);
-                        break;
-                }
-        }
-        return;
-}
-
-static void autofs4_remove_rehash_entrys(struct autofs_info *ino)
-{
-        struct autofs_sb_info *sbi = ino->sbi;
-        struct rehash_entry *entry, *next;
-        struct list_head *head;
-
-        spin_lock(&sbi->fs_lock);
-        spin_lock(&sbi->lookup_lock);
-        if (!(ino->flags & AUTOFS_INF_REHASH)) {
-                spin_unlock(&sbi->lookup_lock);
-                spin_unlock(&sbi->fs_lock);
-                return;
-        }
-        ino->flags &= ~AUTOFS_INF_REHASH;
-        head = &ino->rehash_list;
-        list_for_each_entry_safe(entry, next, head, list) {
-                list_del(&entry->list);
-                kfree(entry);
-        }
-        spin_unlock(&sbi->lookup_lock);
-        spin_unlock(&sbi->fs_lock);
-        dput(ino->dentry);
-
-        return;
-}
-
-static void autofs4_revalidate_drop(struct dentry *dentry,
-                                    struct rehash_entry *entry)
-{
-        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
-        struct autofs_info *ino = autofs4_dentry_ino(dentry);
-        /*
-         * Add to the active list so we can pick this up in
-         * ->lookup(). Also add an entry to a rehash list so
-         * we know when there are no dentrys in flight so we
-         * know when we can rehash the dentry.
-         */
-        spin_lock(&sbi->lookup_lock);
-        if (list_empty(&ino->active))
-                list_add(&ino->active, &sbi->active_list);
-        autofs4_add_rehash_entry(ino, entry);
-        spin_unlock(&sbi->lookup_lock);
-        if (!(ino->flags & AUTOFS_INF_REHASH)) {
-                ino->flags |= AUTOFS_INF_REHASH;
-                dget(dentry);
-                spin_lock(&dentry->d_lock);
-                __d_drop(dentry);
-                spin_unlock(&dentry->d_lock);
-        }
-        return;
-}
-
-static void autofs4_revalidate_rehash(struct dentry *dentry)
-{
-        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
-        struct autofs_info *ino = autofs4_dentry_ino(dentry);
-        if (ino->flags & AUTOFS_INF_REHASH) {
-                spin_lock(&sbi->lookup_lock);
-                autofs4_remove_rehash_entry(ino);
-                if (list_empty(&ino->rehash_list)) {
-                        spin_unlock(&sbi->lookup_lock);
-                        ino->flags &= ~AUTOFS_INF_REHASH;
-                        d_rehash(dentry);
-                        dput(ino->dentry);
-                } else
-                        spin_unlock(&sbi->lookup_lock);
-        }
-        return;
-}
-
 static unsigned int autofs4_need_mount(unsigned int flags)
 {
         unsigned int res = 0;
@@ -236,7 +143,7 @@ out:
         return dcache_dir_open(inode, file);
 }
 
-static int try_to_fill_dentry(struct dentry *dentry)
+static int try_to_fill_dentry(struct dentry *dentry, int flags)
 {
         struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
         struct autofs_info *ino = autofs4_dentry_ino(dentry);
@@ -249,17 +156,55 @@ static int try_to_fill_dentry(struct dentry *dentry)
          * Wait for a pending mount, triggering one if there
          * isn't one already
          */
-        DPRINTK("waiting for mount name=%.*s",
-                 dentry->d_name.len, dentry->d_name.name);
+        if (dentry->d_inode == NULL) {
+                DPRINTK("waiting for mount name=%.*s",
+                         dentry->d_name.len, dentry->d_name.name);
 
-        status = autofs4_wait(sbi, dentry, NFY_MOUNT);
+                status = autofs4_wait(sbi, dentry, NFY_MOUNT);
 
-        DPRINTK("mount done status=%d", status);
+                DPRINTK("mount done status=%d", status);
 
-        /* Update expiry counter */
-        ino->last_used = jiffies;
+                /* Turn this into a real negative dentry? */
+                if (status == -ENOENT) {
+                        spin_lock(&sbi->fs_lock);
+                        ino->flags &= ~AUTOFS_INF_PENDING;
+                        spin_unlock(&sbi->fs_lock);
+                        return status;
+                } else if (status) {
+                        /* Return a negative dentry, but leave it "pending" */
+                        return status;
+                }
+        /* Trigger mount for path component or follow link */
+        } else if (ino->flags & AUTOFS_INF_PENDING ||
+                        autofs4_need_mount(flags) ||
+                        current->link_count) {
+                DPRINTK("waiting for mount name=%.*s",
+                        dentry->d_name.len, dentry->d_name.name);
 
-        return status;
+                spin_lock(&sbi->fs_lock);
+                ino->flags |= AUTOFS_INF_PENDING;
+                spin_unlock(&sbi->fs_lock);
+                status = autofs4_wait(sbi, dentry, NFY_MOUNT);
+
+                DPRINTK("mount done status=%d", status);
+
+                if (status) {
+                        spin_lock(&sbi->fs_lock);
+                        ino->flags &= ~AUTOFS_INF_PENDING;
+                        spin_unlock(&sbi->fs_lock);
+                        return status;
+                }
+        }
+
+        /* Initialize expiry counter after successful mount */
+        if (ino)
+                ino->last_used = jiffies;
+
+        spin_lock(&sbi->fs_lock);
+        ino->flags &= ~AUTOFS_INF_PENDING;
+        spin_unlock(&sbi->fs_lock);
+
+        return 0;
 }
 
 /* For autofs direct mounts the follow link triggers the mount */
@@ -313,16 +258,10 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
          */
         if (ino->flags & AUTOFS_INF_PENDING ||
             (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs))) {
-                ino->flags |= AUTOFS_INF_PENDING;
                 spin_unlock(&dcache_lock);
                 spin_unlock(&sbi->fs_lock);
 
-                status = try_to_fill_dentry(dentry);
-
-                spin_lock(&sbi->fs_lock);
-                ino->flags &= ~AUTOFS_INF_PENDING;
-                spin_unlock(&sbi->fs_lock);
-
+                status = try_to_fill_dentry(dentry, 0);
                 if (status)
                         goto out_error;
 
@@ -361,47 +300,18 @@ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
         struct inode *dir = dentry->d_parent->d_inode;
         struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb);
-        struct autofs_info *ino = autofs4_dentry_ino(dentry);
-        struct rehash_entry *entry;
+        int oz_mode = autofs4_oz_mode(sbi);
         int flags = nd ? nd->flags : 0;
-        unsigned int mutex_aquired;
+        int status = 1;
 
-        DPRINTK("name = %.*s oz_mode = %d",
-                dentry->d_name.len, dentry->d_name.name, oz_mode);
-
-        /* Daemon never causes a mount to trigger */
-        if (autofs4_oz_mode(sbi))
-                return 1;
-
-        entry = kmalloc(sizeof(struct rehash_entry), GFP_KERNEL);
-        if (!entry)
-                return -ENOMEM;
-
-        mutex_aquired = mutex_trylock(&dir->i_mutex);
-
-        spin_lock(&sbi->fs_lock);
-        spin_lock(&dcache_lock);
         /* Pending dentry */
+        spin_lock(&sbi->fs_lock);
         if (autofs4_ispending(dentry)) {
-                int status;
-
-                /*
-                 * We can only unhash and send this to ->lookup() if
-                 * the directory mutex is held over d_revalidate() and
-                 * ->lookup(). This prevents the VFS from incorrectly
-                 * seeing the dentry as non-existent.
-                 */
-                ino->flags |= AUTOFS_INF_PENDING;
-                if (!mutex_aquired) {
-                        autofs4_revalidate_drop(dentry, entry);
-                        spin_unlock(&dcache_lock);
-                        spin_unlock(&sbi->fs_lock);
-                        return 0;
-                }
-                spin_unlock(&dcache_lock);
+                /* The daemon never causes a mount to trigger */
                 spin_unlock(&sbi->fs_lock);
-                mutex_unlock(&dir->i_mutex);
-                kfree(entry);
+
+                if (oz_mode)
+                        return 1;
 
                 /*
                  * If the directory has gone away due to an expire
@@ -415,82 +325,45 @@ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd)
                  * A zero status is success otherwise we have a
                  * negative error code.
                  */
-                status = try_to_fill_dentry(dentry);
-
-                spin_lock(&sbi->fs_lock);
-                ino->flags &= ~AUTOFS_INF_PENDING;
-                spin_unlock(&sbi->fs_lock);
-
+                status = try_to_fill_dentry(dentry, flags);
                 if (status == 0)
                         return 1;
 
                 return status;
         }
+        spin_unlock(&sbi->fs_lock);
+
+        /* Negative dentry.. invalidate if "old" */
+        if (dentry->d_inode == NULL)
+                return 0;
 
         /* Check for a non-mountpoint directory with no contents */
+        spin_lock(&dcache_lock);
         if (S_ISDIR(dentry->d_inode->i_mode) &&
             !d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
                 DPRINTK("dentry=%p %.*s, emptydir",
                          dentry, dentry->d_name.len, dentry->d_name.name);
+                spin_unlock(&dcache_lock);
 
-                if (autofs4_need_mount(flags) || current->link_count) {
-                        int status;
-
-                        /*
-                         * We can only unhash and send this to ->lookup() if
-                         * the directory mutex is held over d_revalidate() and
-                         * ->lookup(). This prevents the VFS from incorrectly
-                         * seeing the dentry as non-existent.
-                         */
-                        ino->flags |= AUTOFS_INF_PENDING;
-                        if (!mutex_aquired) {
-                                autofs4_revalidate_drop(dentry, entry);
-                                spin_unlock(&dcache_lock);
-                                spin_unlock(&sbi->fs_lock);
-                                return 0;
-                        }
-                        spin_unlock(&dcache_lock);
-                        spin_unlock(&sbi->fs_lock);
-                        mutex_unlock(&dir->i_mutex);
-                        kfree(entry);
-
-                        /*
-                         * A zero status is success otherwise we have a
-                         * negative error code.
-                         */
-                        status = try_to_fill_dentry(dentry);
-
-                        spin_lock(&sbi->fs_lock);
-                        ino->flags &= ~AUTOFS_INF_PENDING;
-                        spin_unlock(&sbi->fs_lock);
+                /* The daemon never causes a mount to trigger */
+                if (oz_mode)
+                        return 1;
 
-                        if (status == 0)
-                                return 1;
+                /*
+                 * A zero status is success otherwise we have a
+                 * negative error code.
+                 */
+                status = try_to_fill_dentry(dentry, flags);
+                if (status == 0)
+                        return 1;
 
-                        return status;
-                }
+                return status;
         }
         spin_unlock(&dcache_lock);
-        spin_unlock(&sbi->fs_lock);
-
-        if (mutex_aquired)
-                mutex_unlock(&dir->i_mutex);
-
-        kfree(entry);
 
         return 1;
 }
 
-static void autofs4_free_rehash_entrys(struct autofs_info *inf)
-{
-        struct list_head *head = &inf->rehash_list;
-        struct rehash_entry *entry, *next;
-        list_for_each_entry_safe(entry, next, head, list) {
-                list_del(&entry->list);
-                kfree(entry);
-        }
-}
-
 void autofs4_dentry_release(struct dentry *de)
 {
         struct autofs_info *inf;
@@ -509,8 +382,6 @@ void autofs4_dentry_release(struct dentry *de)
                                 list_del(&inf->active);
                         if (!list_empty(&inf->expiring))
                                 list_del(&inf->expiring);
-                        if (!list_empty(&inf->rehash_list))
-                                autofs4_free_rehash_entrys(inf);
                         spin_unlock(&sbi->lookup_lock);
                 }
 
@@ -543,7 +414,6 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry)
         const unsigned char *str = name->name;
         struct list_head *p, *head;
 
-restart:
         spin_lock(&dcache_lock);
         spin_lock(&sbi->lookup_lock);
         head = &sbi->active_list;
@@ -561,19 +431,6 @@ restart:
                 if (atomic_read(&active->d_count) == 0)
                         goto next;
 
-                if (active->d_inode && IS_DEADDIR(active->d_inode)) {
-                        if (!list_empty(&ino->rehash_list)) {
-                                dget(active);
-                                spin_unlock(&active->d_lock);
-                                spin_unlock(&sbi->lookup_lock);
-                                spin_unlock(&dcache_lock);
-                                autofs4_remove_rehash_entrys(ino);
-                                dput(active);
-                                goto restart;
-                        }
-                        goto next;
-                }
-
                 qstr = &active->d_name;
 
                 if (active->d_name.hash != hash)
@@ -586,11 +443,13 @@ restart:
                 if (memcmp(qstr->name, str, len))
                         goto next;
 
-                dget(active);
-                spin_unlock(&active->d_lock);
-                spin_unlock(&sbi->lookup_lock);
-                spin_unlock(&dcache_lock);
-                return active;
+                if (d_unhashed(active)) {
+                        dget(active);
+                        spin_unlock(&active->d_lock);
+                        spin_unlock(&sbi->lookup_lock);
+                        spin_unlock(&dcache_lock);
+                        return active;
+                }
 next:
                 spin_unlock(&active->d_lock);
         }
@@ -639,11 +498,13 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
                 if (memcmp(qstr->name, str, len))
                         goto next;
 
-                dget(expiring);
-                spin_unlock(&expiring->d_lock);
-                spin_unlock(&sbi->lookup_lock);
-                spin_unlock(&dcache_lock);
-                return expiring;
+                if (d_unhashed(expiring)) {
+                        dget(expiring);
+                        spin_unlock(&expiring->d_lock);
+                        spin_unlock(&sbi->lookup_lock);
+                        spin_unlock(&dcache_lock);
+                        return expiring;
+                }
 next:
                 spin_unlock(&expiring->d_lock);
         }
@@ -653,48 +514,6 @@ next:
         return NULL;
 }
 
-static struct autofs_info *init_new_dentry(struct autofs_sb_info *sbi,
-                                           struct dentry *dentry, int oz_mode)
-{
-        struct autofs_info *ino;
-
-        /*
-         * Mark the dentry incomplete but don't hash it. We do this
-         * to serialize our inode creation operations (symlink and
-         * mkdir) which prevents deadlock during the callback to
-         * the daemon. Subsequent user space lookups for the same
-         * dentry are placed on the wait queue while the daemon
-         * itself is allowed passage unresticted so the create
-         * operation itself can then hash the dentry. Finally,
-         * we check for the hashed dentry and return the newly
-         * hashed dentry.
-         */
-        dentry->d_op = &autofs4_root_dentry_operations;
-
-        /*
-         * And we need to ensure that the same dentry is used for
-         * all following lookup calls until it is hashed so that
-         * the dentry flags are persistent throughout the request.
-         */
-        ino = autofs4_init_ino(NULL, sbi, 0555);
-        if (!ino)
-                return ERR_PTR(-ENOMEM);
-
-        dentry->d_fsdata = ino;
-        ino->dentry = dentry;
-
-        /*
-         * Only set the mount pending flag for new dentrys not created
-         * by the daemon.
-         */
-        if (!oz_mode)
-                ino->flags |= AUTOFS_INF_PENDING;
-
-        d_instantiate(dentry, NULL);
-
-        return ino;
-}
-
 /* Lookups in the root directory */
 static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
@@ -702,7 +521,6 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
         struct autofs_info *ino;
         struct dentry *expiring, *active;
         int oz_mode;
-        int status = 0;
 
         DPRINTK("name = %.*s",
                 dentry->d_name.len, dentry->d_name.name);
@@ -717,26 +535,44 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
         DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
                  current->pid, task_pgrp_nr(current), sbi->catatonic, oz_mode);
 
-        spin_lock(&sbi->fs_lock);
         active = autofs4_lookup_active(dentry);
         if (active) {
                 dentry = active;
                 ino = autofs4_dentry_ino(dentry);
-                /* If this came from revalidate, rehash it */
-                autofs4_revalidate_rehash(dentry);
-                spin_unlock(&sbi->fs_lock);
         } else {
-                spin_unlock(&sbi->fs_lock);
-                ino = init_new_dentry(sbi, dentry, oz_mode);
-                if (IS_ERR(ino))
-                        return (struct dentry *) ino;
-        }
+                /*
+                 * Mark the dentry incomplete but don't hash it. We do this
+                 * to serialize our inode creation operations (symlink and
+                 * mkdir) which prevents deadlock during the callback to
+                 * the daemon. Subsequent user space lookups for the same
+                 * dentry are placed on the wait queue while the daemon
+                 * itself is allowed passage unresticted so the create
+                 * operation itself can then hash the dentry. Finally,
+                 * we check for the hashed dentry and return the newly
+                 * hashed dentry.
+                 */
+                dentry->d_op = &autofs4_root_dentry_operations;
+
+                /*
+                 * And we need to ensure that the same dentry is used for
+                 * all following lookup calls until it is hashed so that
+                 * the dentry flags are persistent throughout the request.
+                 */
+                ino = autofs4_init_ino(NULL, sbi, 0555);
+                if (!ino)
+                        return ERR_PTR(-ENOMEM);
 
-        autofs4_add_active(dentry);
+                dentry->d_fsdata = ino;
+                ino->dentry = dentry;
+
+                autofs4_add_active(dentry);
+
+                d_instantiate(dentry, NULL);
+        }
 
         if (!oz_mode) {
-                expiring = autofs4_lookup_expiring(dentry);
                 mutex_unlock(&dir->i_mutex);
+                expiring = autofs4_lookup_expiring(dentry);
                 if (expiring) {
                         /*
                          * If we are racing with expire the request might not
@@ -744,22 +580,23 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
                          * so it must have been successful, so just wait for it.
                          */
                         autofs4_expire_wait(expiring);
+                        autofs4_del_expiring(expiring);
                         dput(expiring);
                 }
-                status = try_to_fill_dentry(dentry);
-                mutex_lock(&dir->i_mutex);
+
                 spin_lock(&sbi->fs_lock);
-                ino->flags &= ~AUTOFS_INF_PENDING;
+                ino->flags |= AUTOFS_INF_PENDING;
                 spin_unlock(&sbi->fs_lock);
+                if (dentry->d_op && dentry->d_op->d_revalidate)
+                        (dentry->d_op->d_revalidate)(dentry, nd);
+                mutex_lock(&dir->i_mutex);
         }
 
-        autofs4_del_active(dentry);
-
         /*
-         * If we had a mount fail, check if we had to handle
+         * If we are still pending, check if we had to handle
          * a signal. If so we can force a restart..
          */
-        if (status) {
+        if (ino->flags & AUTOFS_INF_PENDING) {
                 /* See if we were interrupted */
                 if (signal_pending(current)) {
                         sigset_t *sigset = &current->pending.signal;
@@ -771,46 +608,43 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
                             return ERR_PTR(-ERESTARTNOINTR);
                         }
                 }
-        }
-
-        /*
-         * User space can (and has done in the past) remove and re-create
-         * this directory during the callback. This can leave us with an
-         * unhashed dentry, but a successful mount!  So we need to
-         * perform another cached lookup in case the dentry now exists.
-         */
-        if (!oz_mode && !have_submounts(dentry)) {
-                struct dentry *new;
-                new = d_lookup(dentry->d_parent, &dentry->d_name);
-                if (new) {
-                        if (active)
-                                dput(active);
-                        return new;
-                } else {
-                        if (!status)
-                                status = -ENOENT;
+                if (!oz_mode) {
+                        spin_lock(&sbi->fs_lock);
+                        ino->flags &= ~AUTOFS_INF_PENDING;
+                        spin_unlock(&sbi->fs_lock);
                 }
         }
 
         /*
-         * If we had a mount failure, return status to user space.
-         * If the mount succeeded and we used a dentry from the active queue
-         * return it.
+         * If this dentry is unhashed, then we shouldn't honour this
+         * lookup.  Returning ENOENT here doesn't do the right thing
+         * for all system calls, but it should be OK for the operations
+         * we permit from an autofs.
          */
-        if (status) {
-                dentry = ERR_PTR(status);
-                if (active)
-                        dput(active);
-                return dentry;
-        } else {
+        if (!oz_mode && d_unhashed(dentry)) {
                 /*
-                 * Valid successful mount, return active dentry or NULL
-                 * for a new dentry.
+                 * A user space application can (and has done in the past)
+                 * remove and re-create this directory during the callback.
+                 * This can leave us with an unhashed dentry, but a
+                 * successful mount!  So we need to perform another
+                 * cached lookup in case the dentry now exists.
                  */
+                struct dentry *parent = dentry->d_parent;
+                struct dentry *new = d_lookup(parent, &dentry->d_name);
+                if (new != NULL)
+                        dentry = new;
+                else
+                        dentry = ERR_PTR(-ENOENT);
+
                 if (active)
-                        return active;
+                        dput(active);
+
+                return dentry;
         }
 
+        if (active)
+                return active;
+
         return NULL;
 }
 
@@ -834,6 +668,8 @@ static int autofs4_dir_symlink(struct inode *dir,
         if (!ino)
                 return -ENOMEM;
 
+        autofs4_del_active(dentry);
+
         ino->size = strlen(symname);
         cp = kmalloc(ino->size + 1, GFP_KERNEL);
         if (!cp) {
@@ -910,6 +746,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
         dir->i_mtime = CURRENT_TIME;
 
         spin_lock(&dcache_lock);
+        autofs4_add_expiring(dentry);
         spin_lock(&dentry->d_lock);
         __d_drop(dentry);
         spin_unlock(&dentry->d_lock);
@@ -935,6 +772,7 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
                 spin_unlock(&dcache_lock);
                 return -ENOTEMPTY;
         }
+        autofs4_add_expiring(dentry);
         spin_lock(&dentry->d_lock);
         __d_drop(dentry);
         spin_unlock(&dentry->d_lock);
@@ -972,6 +810,8 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, int mode)
         if (!ino)
                 return -ENOMEM;
 
+        autofs4_del_active(dentry);
+
         inode = autofs4_get_inode(dir->i_sb, ino);
         if (!inode) {
                 if (!dentry->d_fsdata)
diff --git a/fs/bio.c b/fs/bio.c
index 88094afc29ea..dc17afd672e3 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -507,10 +507,8 @@ int bio_get_nr_vecs(struct block_device *bdev)
         int nr_pages;
 
         nr_pages = ((queue_max_sectors(q) << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        if (nr_pages > queue_max_phys_segments(q))
-                nr_pages = queue_max_phys_segments(q);
-        if (nr_pages > queue_max_hw_segments(q))
-                nr_pages = queue_max_hw_segments(q);
+        if (nr_pages > queue_max_segments(q))
+                nr_pages = queue_max_segments(q);
 
         return nr_pages;
 }
@@ -575,8 +573,7 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
          * make this too complex.
          */
 
-        while (bio->bi_phys_segments >= queue_max_phys_segments(q)
-               || bio->bi_phys_segments >= queue_max_hw_segments(q)) {
+        while (bio->bi_phys_segments >= queue_max_segments(q)) {
 
                 if (retried_segments)
                         return 0;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 9d0809629967..6ed434ac037f 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -720,13 +720,15 @@ again:
                                         inode->i_ino, orig_offset);
                 BUG_ON(ret);
         }
-        fi = btrfs_item_ptr(leaf, path->slots[0],
-                           struct btrfs_file_extent_item);
         if (del_nr == 0) {
+                fi = btrfs_item_ptr(leaf, path->slots[0],
+                           struct btrfs_file_extent_item);
                 btrfs_set_file_extent_type(leaf, fi,
                                            BTRFS_FILE_EXTENT_REG);
                 btrfs_mark_buffer_dirty(leaf);
         } else {
+                fi = btrfs_item_ptr(leaf, del_slot - 1,
+                           struct btrfs_file_extent_item);
                 btrfs_set_file_extent_type(leaf, fi,
                                            BTRFS_FILE_EXTENT_REG);
                 btrfs_set_file_extent_num_bytes(leaf, fi,
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 14ac4806e291..eeb4986ea7db 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -348,7 +348,17 @@ int cachefiles_delete_object(struct cachefiles_cache *cache,
         dir = dget_parent(object->dentry);
 
         mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
-        ret = cachefiles_bury_object(cache, dir, object->dentry);
+
+        /* we need to check that our parent is _still_ our parent - it may have
+         * been renamed */
+        if (dir == object->dentry->d_parent) {
+                ret = cachefiles_bury_object(cache, dir, object->dentry);
+        } else {
+                /* it got moved, presumably by cachefilesd culling it, so it's
+                 * no longer in the key path and we can ignore it */
+                mutex_unlock(&dir->d_inode->i_mutex);
+                ret = 0;
+        }
 
         dput(dir);
         _leave(" = %d", ret);
diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 49503d2edc7e..bc0025cdd1c9 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -1,6 +1,7 @@
 Version 1.62
 ------------
-Add sockopt=TCP_NODELAY mount option.
+Add sockopt=TCP_NODELAY mount option. EA (xattr) routines hardened
+to more strictly handle corrupt frames.
 
 Version 1.61
 ------------
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index ed751bb657db..a1c817eb291a 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -205,7 +205,7 @@ struct cifsUidInfo {
 struct cifsSesInfo {
         struct list_head smb_ses_list;
         struct list_head tcon_list;
-        struct semaphore sesSem;
+        struct mutex session_mutex;
 #if 0
         struct cifsUidInfo *uidInfo;    /* pointer to user info */
 #endif
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 3877737f96a6..14d036d8db11 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -415,10 +415,10 @@ struct smb_hdr {
         __u8 WordCount;
 } __attribute__((packed));
 /* given a pointer to an smb_hdr retrieve the value of byte count */
-#define BCC(smb_var) (*(__u16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount)))
-#define BCC_LE(smb_var) (*(__le16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount)))
+#define BCC(smb_var) (*(__u16 *)((char *)(smb_var) + sizeof(struct smb_hdr) + (2 * (smb_var)->WordCount)))
+#define BCC_LE(smb_var) (*(__le16 *)((char *)(smb_var) + sizeof(struct smb_hdr) + (2 * (smb_var)->WordCount)))
 /* given a pointer to an smb_hdr retrieve the pointer to the byte area */
-#define pByteArea(smb_var) ((unsigned char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount) + 2)
+#define pByteArea(smb_var) ((unsigned char *)(smb_var) + sizeof(struct smb_hdr) + (2 * (smb_var)->WordCount) + 2)
 
 /*
  * Computer Name Length (since Netbios name was length 16 with last byte 0x20)
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 5646727e33f5..88e2bc44ac58 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -363,13 +363,10 @@ extern int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
                         __u32 filter, struct file *file, int multishot,
                         const struct nls_table *nls_codepage);
 extern ssize_t CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
-                        const unsigned char *searchName, char *EAData,
+                        const unsigned char *searchName,
+                        const unsigned char *ea_name, char *EAData,
                         size_t bufsize, const struct nls_table *nls_codepage,
                         int remap_special_chars);
-extern ssize_t CIFSSMBQueryEA(const int xid, struct cifsTconInfo *tcon,
-                const unsigned char *searchName, const unsigned char *ea_name,
-                unsigned char *ea_value, size_t buf_size,
-                const struct nls_table *nls_codepage, int remap_special_chars);
 extern int CIFSSMBSetEA(const int xid, struct cifsTconInfo *tcon,
                 const char *fileName, const char *ea_name,
                 const void *ea_value, const __u16 ea_value_len,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 941441d3e386..9d17df3e0768 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -170,19 +170,19 @@ cifs_reconnect_tcon(struct cifsTconInfo *tcon, int smb_command)
          * need to prevent multiple threads trying to simultaneously
          * reconnect the same SMB session
          */
-        down(&ses->sesSem);
+        mutex_lock(&ses->session_mutex);
         if (ses->need_reconnect)
                 rc = cifs_setup_session(0, ses, nls_codepage);
 
         /* do we need to reconnect tcon? */
         if (rc || !tcon->need_reconnect) {
-                up(&ses->sesSem);
+                mutex_unlock(&ses->session_mutex);
                 goto out;
         }
 
         mark_open_files_invalid(tcon);
         rc = CIFSTCon(0, ses, tcon->treeName, tcon, nls_codepage);
-        up(&ses->sesSem);
+        mutex_unlock(&ses->session_mutex);
         cFYI(1, ("reconnect tcon rc = %d", rc));
 
         if (rc)
@@ -700,13 +700,13 @@ CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
         if (!ses || !ses->server)
                 return -EIO;
 
-        down(&ses->sesSem);
+        mutex_lock(&ses->session_mutex);
         if (ses->need_reconnect)
                 goto session_already_dead; /* no need to send SMBlogoff if uid
                                               already closed due to reconnect */
         rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB);
         if (rc) {
-                up(&ses->sesSem);
+                mutex_unlock(&ses->session_mutex);
                 return rc;
         }
 
@@ -721,7 +721,7 @@ CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
         pSMB->AndXCommand = 0xFF;
         rc = SendReceiveNoRsp(xid, ses, (struct smb_hdr *) pSMB, 0);
 session_already_dead:
-        up(&ses->sesSem);
+        mutex_unlock(&ses->session_mutex);
 
         /* if session dead then we do not need to do ulogoff,
                 since server closed smb session, no sense reporting
@@ -5269,22 +5269,34 @@ int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
         cifs_buf_release(pSMB);
         return rc;
 }
+
 #ifdef CONFIG_CIFS_XATTR
+/*
+ * Do a path-based QUERY_ALL_EAS call and parse the result. This is a common
+ * function used by listxattr and getxattr type calls. When ea_name is set,
+ * it looks for that attribute name and stuffs that value into the EAData
+ * buffer. When ea_name is NULL, it stuffs a list of attribute names into the
+ * buffer. In both cases, the return value is either the length of the
+ * resulting data or a negative error code. If EAData is a NULL pointer then
+ * the data isn't copied to it, but the length is returned.
+ */
 ssize_t
 CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
-                 const unsigned char *searchName,
-                 char *EAData, size_t buf_size,
-                 const struct nls_table *nls_codepage, int remap)
+                const unsigned char *searchName, const unsigned char *ea_name,
+                char *EAData, size_t buf_size,
+                const struct nls_table *nls_codepage, int remap)
 {
                 /* BB assumes one setup word */
         TRANSACTION2_QPI_REQ *pSMB = NULL;
         TRANSACTION2_QPI_RSP *pSMBr = NULL;
         int rc = 0;
         int bytes_returned;
-        int name_len;
+        int list_len;
+        struct fealist *ea_response_data;
         struct fea *temp_fea;
         char *temp_ptr;
-        __u16 params, byte_count;
+        char *end_of_smb;
+        __u16 params, byte_count, data_offset;
 
         cFYI(1, ("In Query All EAs path %s", searchName));
 QAllEAsRetry:
@@ -5294,22 +5306,22 @@ QAllEAsRetry:
                 return rc;
 
         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
-                name_len =
+                list_len =
                     cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
                                      PATH_MAX, nls_codepage, remap);
-                name_len++;     /* trailing null */
-                name_len *= 2;
+                list_len++;     /* trailing null */
+                list_len *= 2;
         } else {        /* BB improve the check for buffer overruns BB */
-                name_len = strnlen(searchName, PATH_MAX);
-                name_len++;     /* trailing null */
-                strncpy(pSMB->FileName, searchName, name_len);
+                list_len = strnlen(searchName, PATH_MAX);
+                list_len++;     /* trailing null */
+                strncpy(pSMB->FileName, searchName, list_len);
         }
 
-        params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
+        params = 2 /* level */ + 4 /* reserved */ + list_len /* includes NUL */;
         pSMB->TotalDataCount = 0;
         pSMB->MaxParameterCount = cpu_to_le16(2);
         /* BB find exact max SMB PDU from sess structure BB */
-        pSMB->MaxDataCount = cpu_to_le16(4000);
+        pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
         pSMB->MaxSetupCount = 0;
         pSMB->Reserved = 0;
         pSMB->Flags = 0;
@@ -5334,237 +5346,117 @@ QAllEAsRetry:
                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
         if (rc) {
                 cFYI(1, ("Send error in QueryAllEAs = %d", rc));
-        } else {                /* decode response */
-                rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+                goto QAllEAsOut;
+        }
 
-                /* BB also check enough total bytes returned */
-                /* BB we need to improve the validity checking
-                of these trans2 responses */
-                if (rc || (pSMBr->ByteCount < 4))
-                        rc = -EIO;      /* bad smb */
-           /* else if (pFindData){
-                        memcpy((char *) pFindData,
-                               (char *) &pSMBr->hdr.Protocol +
-                               data_offset, kl);
-                }*/ else {
-                        /* check that length of list is not more than bcc */
-                        /* check that each entry does not go beyond length
-                           of list */
-                        /* check that each element of each entry does not
-                           go beyond end of list */
-                        __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
-                        struct fealist *ea_response_data;
-                        rc = 0;
-                        /* validate_trans2_offsets() */
-                        /* BB check if start of smb + data_offset > &bcc+ bcc */
-                        ea_response_data = (struct fealist *)
-                                (((char *) &pSMBr->hdr.Protocol) +
-                                data_offset);
-                        name_len = le32_to_cpu(ea_response_data->list_len);
-                        cFYI(1, ("ea length %d", name_len));
-                        if (name_len <= 8) {
-                        /* returned EA size zeroed at top of function */
-                                cFYI(1, ("empty EA list returned from server"));
-                        } else {
-                                /* account for ea list len */
-                                name_len -= 4;
-                                temp_fea = ea_response_data->list;
-                                temp_ptr = (char *)temp_fea;
-                                while (name_len > 0) {
-                                        __u16 value_len;
-                                        name_len -= 4;
-                                        temp_ptr += 4;
-                                        rc += temp_fea->name_len;
-                                /* account for prefix user. and trailing null */
-                                        rc = rc + 5 + 1;
-                                        if (rc < (int)buf_size) {
-                                                memcpy(EAData, "user.", 5);
-                                                EAData += 5;
-                                                memcpy(EAData, temp_ptr,
-                                                       temp_fea->name_len);
-                                                EAData += temp_fea->name_len;
-                                                /* null terminate name */
-                                                *EAData = 0;
-                                                EAData = EAData + 1;
-                                        } else if (buf_size == 0) {
-                                                /* skip copy - calc size only */
-                                        } else {
-                                                /* stop before overrun buffer */
-                                                rc = -ERANGE;
-                                                break;
-                                        }
-                                        name_len -= temp_fea->name_len;
-                                        temp_ptr += temp_fea->name_len;
-                                        /* account for trailing null */
-                                        name_len--;
-                                        temp_ptr++;
-                                        value_len =
-                                              le16_to_cpu(temp_fea->value_len);
-                                        name_len -= value_len;
-                                        temp_ptr += value_len;
-                                        /* BB check that temp_ptr is still
-                                              within the SMB BB*/
-
-                                        /* no trailing null to account for
-                                           in value len */
-                                        /* go on to next EA */
-                                        temp_fea = (struct fea *)temp_ptr;
-                                }
-                        }
-                }
+
+        /* BB also check enough total bytes returned */
+        /* BB we need to improve the validity checking
+        of these trans2 responses */
+
+        rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+        if (rc || (pSMBr->ByteCount < 4)) {
+                rc = -EIO;      /* bad smb */
+                goto QAllEAsOut;
         }
-        cifs_buf_release(pSMB);
-        if (rc == -EAGAIN)
-                goto QAllEAsRetry;
 
-        return (ssize_t)rc;
-}
+        /* check that length of list is not more than bcc */
+        /* check that each entry does not go beyond length
+           of list */
+        /* check that each element of each entry does not
+           go beyond end of list */
+        /* validate_trans2_offsets() */
+        /* BB check if start of smb + data_offset > &bcc+ bcc */
 
-ssize_t CIFSSMBQueryEA(const int xid, struct cifsTconInfo *tcon,
-                const unsigned char *searchName, const unsigned char *ea_name,
-                unsigned char *ea_value, size_t buf_size,
-                const struct nls_table *nls_codepage, int remap)
-{
-        TRANSACTION2_QPI_REQ *pSMB = NULL;
-        TRANSACTION2_QPI_RSP *pSMBr = NULL;
-        int rc = 0;
-        int bytes_returned;
-        int name_len;
-        struct fea *temp_fea;
-        char *temp_ptr;
-        __u16 params, byte_count;
+        data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
+        ea_response_data = (struct fealist *)
+                                (((char *) &pSMBr->hdr.Protocol) + data_offset);
 
-        cFYI(1, ("In Query EA path %s", searchName));
-QEARetry:
-        rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
-                      (void **) &pSMBr);
-        if (rc)
-                return rc;
+        list_len = le32_to_cpu(ea_response_data->list_len);
+        cFYI(1, ("ea length %d", list_len));
+        if (list_len <= 8) {
+                cFYI(1, ("empty EA list returned from server"));
+                goto QAllEAsOut;
+        }
 
-        if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
-                name_len =
-                    cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
-                                     PATH_MAX, nls_codepage, remap);
-                name_len++;     /* trailing null */
-                name_len *= 2;
-        } else {        /* BB improve the check for buffer overruns BB */
-                name_len = strnlen(searchName, PATH_MAX);
-                name_len++;     /* trailing null */
-                strncpy(pSMB->FileName, searchName, name_len);
+        /* make sure list_len doesn't go past end of SMB */
+        end_of_smb = (char *)pByteArea(&pSMBr->hdr) + BCC(&pSMBr->hdr);
+        if ((char *)ea_response_data + list_len > end_of_smb) {
+                cFYI(1, ("EA list appears to go beyond SMB"));
+                rc = -EIO;
+                goto QAllEAsOut;
         }
 
-        params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
-        pSMB->TotalDataCount = 0;
-        pSMB->MaxParameterCount = cpu_to_le16(2);
-        /* BB find exact max SMB PDU from sess structure BB */
-        pSMB->MaxDataCount = cpu_to_le16(4000);
-        pSMB->MaxSetupCount = 0;
-        pSMB->Reserved = 0;
-        pSMB->Flags = 0;
-        pSMB->Timeout = 0;
-        pSMB->Reserved2 = 0;
-        pSMB->ParameterOffset = cpu_to_le16(offsetof(
-                struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
-        pSMB->DataCount = 0;
-        pSMB->DataOffset = 0;
-        pSMB->SetupCount = 1;
-        pSMB->Reserved3 = 0;
-        pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
-        byte_count = params + 1 /* pad */ ;
-        pSMB->TotalParameterCount = cpu_to_le16(params);
-        pSMB->ParameterCount = pSMB->TotalParameterCount;
-        pSMB->InformationLevel = cpu_to_le16(SMB_INFO_QUERY_ALL_EAS);
-        pSMB->Reserved4 = 0;
-        pSMB->hdr.smb_buf_length += byte_count;
-        pSMB->ByteCount = cpu_to_le16(byte_count);
+        /* account for ea list len */
+        list_len -= 4;
+        temp_fea = ea_response_data->list;
+        temp_ptr = (char *)temp_fea;
+        while (list_len > 0) {
+                unsigned int name_len;
+                __u16 value_len;
+
+                list_len -= 4;
+                temp_ptr += 4;
+                /* make sure we can read name_len and value_len */
+                if (list_len < 0) {
+                        cFYI(1, ("EA entry goes beyond length of list"));
+                        rc = -EIO;
+                        goto QAllEAsOut;
+                }
 
-        rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
-                         (struct smb_hdr *) pSMBr, &bytes_returned, 0);
-        if (rc) {
-                cFYI(1, ("Send error in Query EA = %d", rc));
-        } else {                /* decode response */
-                rc = validate_t2((struct smb_t2_rsp *)pSMBr);
+                name_len = temp_fea->name_len;
+                value_len = le16_to_cpu(temp_fea->value_len);
+                list_len -= name_len + 1 + value_len;
+                if (list_len < 0) {
+                        cFYI(1, ("EA entry goes beyond length of list"));
+                        rc = -EIO;
+                        goto QAllEAsOut;
+                }
 
-                /* BB also check enough total bytes returned */
-                /* BB we need to improve the validity checking
-                of these trans2 responses */
-                if (rc || (pSMBr->ByteCount < 4))
-                        rc = -EIO;      /* bad smb */
-           /* else if (pFindData){
-                        memcpy((char *) pFindData,
-                               (char *) &pSMBr->hdr.Protocol +
-                               data_offset, kl);
-                }*/ else {
-                        /* check that length of list is not more than bcc */
-                        /* check that each entry does not go beyond length
-                           of list */
-                        /* check that each element of each entry does not
-                           go beyond end of list */
-                        __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
-                        struct fealist *ea_response_data;
-                        rc = -ENODATA;
-                        /* validate_trans2_offsets() */
-                        /* BB check if start of smb + data_offset > &bcc+ bcc*/
-                        ea_response_data = (struct fealist *)
-                                (((char *) &pSMBr->hdr.Protocol) +
-                                data_offset);
-                        name_len = le32_to_cpu(ea_response_data->list_len);
-                        cFYI(1, ("ea length %d", name_len));
-                        if (name_len <= 8) {
-                        /* returned EA size zeroed at top of function */
-                                cFYI(1, ("empty EA list returned from server"));
-                        } else {
-                                /* account for ea list len */
-                                name_len -= 4;
-                                temp_fea = ea_response_data->list;
-                                temp_ptr = (char *)temp_fea;
-                                /* loop through checking if we have a matching
-                                name and then return the associated value */
-                                while (name_len > 0) {
-                                        __u16 value_len;
-                                        name_len -= 4;
-                                        temp_ptr += 4;
-                                        value_len =
-                                              le16_to_cpu(temp_fea->value_len);
-                                /* BB validate that value_len falls within SMB,
-                                even though maximum for name_len is 255 */
-                                        if (memcmp(temp_fea->name, ea_name,
-                                                  temp_fea->name_len) == 0) {
-                                                /* found a match */
-                                                rc = value_len;
-                                /* account for prefix user. and trailing null */
-                                                if (rc <= (int)buf_size) {
-                                                        memcpy(ea_value,
-                                                                temp_fea->name+temp_fea->name_len+1,
-                                                                rc);
-                                                        /* ea values, unlike ea
-                                                           names, are not null
-                                                           terminated */
-                                                } else if (buf_size == 0) {
-                                                /* skip copy - calc size only */
-                                                } else {
-                                                /* stop before overrun buffer */
-                                                        rc = -ERANGE;
-                                                }
-                                                break;
-                                        }
-                                        name_len -= temp_fea->name_len;
-                                        temp_ptr += temp_fea->name_len;
-                                        /* account for trailing null */
-                                        name_len--;
-                                        temp_ptr++;
-                                        name_len -= value_len;
-                                        temp_ptr += value_len;
-                                        /* No trailing null to account for in
-                                           value_len.  Go on to next EA */
-                                        temp_fea = (struct fea *)temp_ptr;
+                if (ea_name) {
+                        if (strncmp(ea_name, temp_ptr, name_len) == 0) {
+                                temp_ptr += name_len + 1;
+                                rc = value_len;
+                                if (buf_size == 0)
+                                        goto QAllEAsOut;
+                                if ((size_t)value_len > buf_size) {
+                                        rc = -ERANGE;
+                                        goto QAllEAsOut;
                                 }
+                                memcpy(EAData, temp_ptr, value_len);
+                                goto QAllEAsOut;
+                        }
+                } else {
+                        /* account for prefix user. and trailing null */
+                        rc += (5 + 1 + name_len);
+                        if (rc < (int) buf_size) {
+                                memcpy(EAData, "user.", 5);
+                                EAData += 5;
+                                memcpy(EAData, temp_ptr, name_len);
+                                EAData += name_len;
+                                /* null terminate name */
+                                *EAData = 0;
+                                ++EAData;
+                        } else if (buf_size == 0) {
+                                /* skip copy - calc size only */
+                        } else {
+                                /* stop before overrun buffer */
+                                rc = -ERANGE;
+                                break;
                         }
                 }
+                temp_ptr += name_len + 1 + value_len;
+                temp_fea = (struct fea *)temp_ptr;
         }
+
+        /* didn't find the named attribute */
+        if (ea_name)
+                rc = -ENODATA;
+
+QAllEAsOut:
         cifs_buf_release(pSMB);
         if (rc == -EAGAIN)
-                goto QEARetry;
+                goto QAllEAsRetry;
 
         return (ssize_t)rc;
 }
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2e9e09ca0e30..45eb6cba793f 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2388,13 +2388,13 @@ try_mount_again:
                  */
                 cifs_put_tcp_session(srvTcp);
 
-                down(&pSesInfo->sesSem);
+                mutex_lock(&pSesInfo->session_mutex);
                 if (pSesInfo->need_reconnect) {
                         cFYI(1, ("Session needs reconnect"));
                         rc = cifs_setup_session(xid, pSesInfo,
                                                 cifs_sb->local_nls);
                 }
-                up(&pSesInfo->sesSem);
+                mutex_unlock(&pSesInfo->session_mutex);
         } else if (!rc) {
                 cFYI(1, ("Existing smb sess not found"));
                 pSesInfo = sesInfoAlloc();
@@ -2437,12 +2437,12 @@ try_mount_again:
                 }
                 pSesInfo->linux_uid = volume_info->linux_uid;
                 pSesInfo->overrideSecFlg = volume_info->secFlg;
-                down(&pSesInfo->sesSem);
+                mutex_lock(&pSesInfo->session_mutex);
 
                 /* BB FIXME need to pass vol->secFlgs BB */
                 rc = cifs_setup_session(xid, pSesInfo,
                                         cifs_sb->local_nls);
-                up(&pSesInfo->sesSem);
+                mutex_unlock(&pSesInfo->session_mutex);
         }
 
         /* search for existing tcon to this server share */
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 057e1dae12ab..3d8f8a96f5a3 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2289,9 +2289,9 @@ cifs_oplock_break(struct slow_work *work)
         if (inode && S_ISREG(inode->i_mode)) {
 #ifdef CONFIG_CIFS_EXPERIMENTAL
                 if (cinode->clientCanCacheAll == 0)
-                        break_lease(inode, FMODE_READ);
+                        break_lease(inode, O_RDONLY);
                 else if (cinode->clientCanCacheRead == 0)
-                        break_lease(inode, FMODE_WRITE);
+                        break_lease(inode, O_WRONLY);
 #endif
                 rc = filemap_fdatawrite(inode->i_mapping);
                 if (cinode->clientCanCacheRead == 0) {
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index e3fda978f481..8bdbc818164c 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -111,6 +111,7 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
 
         cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
 
+        cifs_i->server_eof = fattr->cf_eof;
         /*
          * Can't safely change the file size here if the client is writing to
          * it due to potential races.
@@ -366,7 +367,7 @@ static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
         char ea_value[4];
         __u32 mode;
 
-        rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
+        rc = CIFSSMBQAllEAs(xid, cifs_sb->tcon, path, "SETFILEBITS",
                             ea_value, 4 /* size of buf */, cifs_sb->local_nls,
                             cifs_sb->mnt_cifs_flags &
                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index d27d4ec6579b..d1474996a812 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -79,7 +79,7 @@ sesInfoAlloc(void)
                 ++ret_buf->ses_count;
                 INIT_LIST_HEAD(&ret_buf->smb_ses_list);
                 INIT_LIST_HEAD(&ret_buf->tcon_list);
-                init_MUTEX(&ret_buf->sesSem);
+                mutex_init(&ret_buf->session_mutex);
         }
         return ret_buf;
 }
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index a75afa3dd9e1..3e2ef0de1209 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -244,7 +244,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
                         /* revalidate/getattr then populate from inode */
                 } /* BB add else when above is implemented */
                 ea_name += 5; /* skip past user. prefix */
-                rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
+                rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
                         buf_size, cifs_sb->local_nls,
                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
         } else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
@@ -252,7 +252,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
                         goto get_ea_exit;
 
                 ea_name += 4; /* skip past os2. prefix */
-                rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
+                rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
                         buf_size, cifs_sb->local_nls,
                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
         } else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
@@ -364,8 +364,8 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
         /* if proc/fs/cifs/streamstoxattr is set then
                 search server for EAs or streams to
                 returns as xattrs */
-        rc = CIFSSMBQAllEAs(xid, pTcon, full_path, data, buf_size,
-                                cifs_sb->local_nls,
+        rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data,
+                                buf_size, cifs_sb->local_nls,
                                 cifs_sb->mnt_cifs_flags &
                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 
diff --git a/fs/dcache.c b/fs/dcache.c
index 953173a293a9..f1358e5c3a59 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -257,6 +257,7 @@ kill_it:
         if (dentry)
                 goto repeat;
 }
+EXPORT_SYMBOL(dput);
 
 /**
  * d_invalidate - invalidate a dentry
@@ -314,6 +315,7 @@ int d_invalidate(struct dentry * dentry)
         spin_unlock(&dcache_lock);
         return 0;
 }
+EXPORT_SYMBOL(d_invalidate);
 
 /* This should be called _only_ with dcache_lock held */
 
@@ -328,6 +330,7 @@ struct dentry * dget_locked(struct dentry *dentry)
 {
         return __dget_locked(dentry);
 }
+EXPORT_SYMBOL(dget_locked);
 
 /**
  * d_find_alias - grab a hashed alias of inode
@@ -384,6 +387,7 @@ struct dentry * d_find_alias(struct inode *inode)
         }
         return de;
 }
+EXPORT_SYMBOL(d_find_alias);
 
 /*
  *      Try to kill dentries associated with this inode.
@@ -408,6 +412,7 @@ restart:
         }
         spin_unlock(&dcache_lock);
 }
+EXPORT_SYMBOL(d_prune_aliases);
 
 /*
  * Throw away a dentry - free the inode, dput the parent.  This requires that
@@ -610,6 +615,7 @@ void shrink_dcache_sb(struct super_block * sb)
 {
         __shrink_dcache_sb(sb, NULL, 0);
 }
+EXPORT_SYMBOL(shrink_dcache_sb);
 
 /*
  * destroy a single subtree of dentries for unmount
@@ -792,6 +798,7 @@ positive:
         spin_unlock(&dcache_lock);
         return 1;
 }
+EXPORT_SYMBOL(have_submounts);
 
 /*
  * Search the dentry child list for the specified parent,
@@ -876,6 +883,7 @@ void shrink_dcache_parent(struct dentry * parent)
         while ((found = select_parent(parent)) != 0)
                 __shrink_dcache_sb(sb, &found, 0);
 }
+EXPORT_SYMBOL(shrink_dcache_parent);
 
 /*
  * Scan `nr' dentries and return the number which remain.
@@ -968,6 +976,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
 
         return dentry;
 }
+EXPORT_SYMBOL(d_alloc);
 
 struct dentry *d_alloc_name(struct dentry *parent, const char *name)
 {
@@ -1012,6 +1021,7 @@ void d_instantiate(struct dentry *entry, struct inode * inode)
         spin_unlock(&dcache_lock);
         security_d_instantiate(entry, inode);
 }
+EXPORT_SYMBOL(d_instantiate);
 
 /**
  * d_instantiate_unique - instantiate a non-aliased dentry
@@ -1108,6 +1118,7 @@ struct dentry * d_alloc_root(struct inode * root_inode)
         }
         return res;
 }
+EXPORT_SYMBOL(d_alloc_root);
 
 static inline struct hlist_head *d_hash(struct dentry *parent,
                                         unsigned long hash)
@@ -1211,7 +1222,6 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
                         BUG_ON(!(new->d_flags & DCACHE_DISCONNECTED));
                         spin_unlock(&dcache_lock);
                         security_d_instantiate(new, inode);
-                        d_rehash(dentry);
                         d_move(new, dentry);
                         iput(inode);
                 } else {
@@ -1225,6 +1235,7 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
                 d_add(dentry, inode);
         return new;
 }
+EXPORT_SYMBOL(d_splice_alias);
 
 /**
  * d_add_ci - lookup or allocate new dentry with case-exact name
@@ -1314,6 +1325,7 @@ err_out:
         iput(inode);
         return ERR_PTR(error);
 }
+EXPORT_SYMBOL(d_add_ci);
 
 /**
  * d_lookup - search for a dentry
@@ -1357,6 +1369,7 @@ struct dentry * d_lookup(struct dentry * parent, struct qstr * name)
         } while (read_seqretry(&rename_lock, seq));
         return dentry;
 }
+EXPORT_SYMBOL(d_lookup);
 
 struct dentry * __d_lookup(struct dentry * parent, struct qstr * name)
 {
@@ -1483,6 +1496,7 @@ int d_validate(struct dentry *dentry, struct dentry *dparent)
 out:
         return 0;
 }
+EXPORT_SYMBOL(d_validate);
 
 /*
  * When a file is deleted, we have two options:
@@ -1528,6 +1542,7 @@ void d_delete(struct dentry * dentry)
 
         fsnotify_nameremove(dentry, isdir);
 }
+EXPORT_SYMBOL(d_delete);
 
 static void __d_rehash(struct dentry * entry, struct hlist_head *list)
 {
@@ -1556,6 +1571,7 @@ void d_rehash(struct dentry * entry)
         spin_unlock(&entry->d_lock);
         spin_unlock(&dcache_lock);
 }
+EXPORT_SYMBOL(d_rehash);
 
 /*
  * When switching names, the actual string doesn't strictly have to
@@ -1702,6 +1718,7 @@ void d_move(struct dentry * dentry, struct dentry * target)
         d_move_locked(dentry, target);
         spin_unlock(&dcache_lock);
 }
+EXPORT_SYMBOL(d_move);
 
 /**
  * d_ancestor - search for an ancestor
@@ -1868,6 +1885,7 @@ shouldnt_be_hashed:
         spin_unlock(&dcache_lock);
         BUG();
 }
+EXPORT_SYMBOL_GPL(d_materialise_unique);
 
 static int prepend(char **buffer, int *buflen, const char *str, int namelen)
 {
@@ -2005,6 +2023,7 @@ char *d_path(const struct path *path, char *buf, int buflen)
         path_put(&root);
         return res;
 }
+EXPORT_SYMBOL(d_path);
 
 /*
  * Helper function for dentry_operations.d_dname() members
@@ -2171,6 +2190,30 @@ int is_subdir(struct dentry *new_dentry, struct dentry *old_dentry)
         return result;
 }
 
+int path_is_under(struct path *path1, struct path *path2)
+{
+        struct vfsmount *mnt = path1->mnt;
+        struct dentry *dentry = path1->dentry;
+        int res;
+        spin_lock(&vfsmount_lock);
+        if (mnt != path2->mnt) {
+                for (;;) {
+                        if (mnt->mnt_parent == mnt) {
+                                spin_unlock(&vfsmount_lock);
+                                return 0;
+                        }
+                        if (mnt->mnt_parent == path2->mnt)
+                                break;
+                        mnt = mnt->mnt_parent;
+                }
+                dentry = mnt->mnt_mountpoint;
+        }
+        res = is_subdir(dentry, path2->dentry);
+        spin_unlock(&vfsmount_lock);
+        return res;
+}
+EXPORT_SYMBOL(path_is_under);
+
 void d_genocide(struct dentry *root)
 {
         struct dentry *this_parent = root;
@@ -2228,6 +2271,7 @@ ino_t find_inode_number(struct dentry *dir, struct qstr *name)
         }
         return ino;
 }
+EXPORT_SYMBOL(find_inode_number);
 
 static __initdata unsigned long dhash_entries;
 static int __init set_dhash_entries(char *str)
@@ -2297,6 +2341,7 @@ static void __init dcache_init(void)
 
 /* SLAB cache for __getname() consumers */
 struct kmem_cache *names_cachep __read_mostly;
+EXPORT_SYMBOL(names_cachep);
 
 EXPORT_SYMBOL(d_genocide);
 
@@ -2326,26 +2371,3 @@ void __init vfs_caches_init(unsigned long mempages)
         bdev_cache_init();
         chrdev_init();
 }
-
-EXPORT_SYMBOL(d_alloc);
-EXPORT_SYMBOL(d_alloc_root);
-EXPORT_SYMBOL(d_delete);
-EXPORT_SYMBOL(d_find_alias);
-EXPORT_SYMBOL(d_instantiate);
-EXPORT_SYMBOL(d_invalidate);
-EXPORT_SYMBOL(d_lookup);
-EXPORT_SYMBOL(d_move);
-EXPORT_SYMBOL_GPL(d_materialise_unique);
-EXPORT_SYMBOL(d_path);
-EXPORT_SYMBOL(d_prune_aliases);
-EXPORT_SYMBOL(d_rehash);
-EXPORT_SYMBOL(d_splice_alias);
-EXPORT_SYMBOL(d_add_ci);
-EXPORT_SYMBOL(d_validate);
-EXPORT_SYMBOL(dget_locked);
-EXPORT_SYMBOL(dput);
-EXPORT_SYMBOL(find_inode_number);
-EXPORT_SYMBOL(have_submounts);
-EXPORT_SYMBOL(names_cachep);
-EXPORT_SYMBOL(shrink_dcache_parent);
-EXPORT_SYMBOL(shrink_dcache_sb);
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 274ac865bae8..049d6c36da09 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -496,7 +496,7 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
         }
         d_move(old_dentry, dentry);
         fsnotify_move(old_dir->d_inode, new_dir->d_inode, old_name,
-                old_dentry->d_name.name, S_ISDIR(old_dentry->d_inode->i_mode),
+                S_ISDIR(old_dentry->d_inode->i_mode),
                 NULL, old_dentry);
         fsnotify_oldname_free(old_name);
         unlock_rename(new_dir, old_dir);
diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index dc2ad6008b2d..4314f0d48d85 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -2,7 +2,7 @@
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
-**  Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2004-2010 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -33,10 +33,10 @@ void dlm_del_ast(struct dlm_lkb *lkb)
         spin_unlock(&ast_queue_lock);
 }
 
-void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
+void dlm_add_ast(struct dlm_lkb *lkb, int type, int mode)
 {
         if (lkb->lkb_flags & DLM_IFL_USER) {
-                dlm_user_add_ast(lkb, type, bastmode);
+                dlm_user_add_ast(lkb, type, mode);
                 return;
         }
 
@@ -44,10 +44,21 @@ void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
         if (!(lkb->lkb_ast_type & (AST_COMP | AST_BAST))) {
                 kref_get(&lkb->lkb_ref);
                 list_add_tail(&lkb->lkb_astqueue, &ast_queue);
+                lkb->lkb_ast_first = type;
         }
+
+        /* sanity check, this should not happen */
+
+        if ((type == AST_COMP) && (lkb->lkb_ast_type & AST_COMP))
+                log_print("repeat cast %d castmode %d lock %x %s",
+                          mode, lkb->lkb_castmode,
+                          lkb->lkb_id, lkb->lkb_resource->res_name);
+
         lkb->lkb_ast_type |= type;
-        if (bastmode)
-                lkb->lkb_bastmode = bastmode;
+        if (type == AST_BAST)
+                lkb->lkb_bastmode = mode;
+        else
+                lkb->lkb_castmode = mode;
         spin_unlock(&ast_queue_lock);
 
         set_bit(WAKE_ASTS, &astd_wakeflags);
@@ -59,9 +70,9 @@ static void process_asts(void)
         struct dlm_ls *ls = NULL;
         struct dlm_rsb *r = NULL;
         struct dlm_lkb *lkb;
-        void (*cast) (void *astparam);
-        void (*bast) (void *astparam, int mode);
-        int type = 0, bastmode;
+        void (*castfn) (void *astparam);
+        void (*bastfn) (void *astparam, int mode);
+        int type, first, bastmode, castmode, do_bast, do_cast, last_castmode;
 
 repeat:
         spin_lock(&ast_queue_lock);
@@ -75,17 +86,48 @@ repeat:
                 list_del(&lkb->lkb_astqueue);
                 type = lkb->lkb_ast_type;
                 lkb->lkb_ast_type = 0;
+                first = lkb->lkb_ast_first;
+                lkb->lkb_ast_first = 0;
                 bastmode = lkb->lkb_bastmode;
-
+                castmode = lkb->lkb_castmode;
+                castfn = lkb->lkb_astfn;
+                bastfn = lkb->lkb_bastfn;
                 spin_unlock(&ast_queue_lock);
-                cast = lkb->lkb_astfn;
-                bast = lkb->lkb_bastfn;
-
-                if ((type & AST_COMP) && cast)
-                        cast(lkb->lkb_astparam);
 
-                if ((type & AST_BAST) && bast)
-                        bast(lkb->lkb_astparam, bastmode);
+                do_cast = (type & AST_COMP) && castfn;
+                do_bast = (type & AST_BAST) && bastfn;
+
+                /* Skip a bast if its blocking mode is compatible with the
+                   granted mode of the preceding cast. */
+
+                if (do_bast) {
+                        if (first == AST_COMP)
+                                last_castmode = castmode;
+                        else
+                                last_castmode = lkb->lkb_castmode_done;
+                        if (dlm_modes_compat(bastmode, last_castmode))
+                                do_bast = 0;
+                }
+
+                if (first == AST_COMP) {
+                        if (do_cast)
+                                castfn(lkb->lkb_astparam);
+                        if (do_bast)
+                                bastfn(lkb->lkb_astparam, bastmode);
+                } else if (first == AST_BAST) {
+                        if (do_bast)
+                                bastfn(lkb->lkb_astparam, bastmode);
+                        if (do_cast)
+                                castfn(lkb->lkb_astparam);
+                } else {
+                        log_error(ls, "bad ast_first %d ast_type %d",
+                                  first, type);
+                }
+
+                if (do_cast)
+                        lkb->lkb_castmode_done = castmode;
+                if (do_bast)
+                        lkb->lkb_bastmode_done = bastmode;
 
                 /* this removes the reference added by dlm_add_ast
                    and may result in the lkb being freed */
diff --git a/fs/dlm/ast.h b/fs/dlm/ast.h
index 1b5fc5f428fd..bcb1aaba519d 100644
--- a/fs/dlm/ast.h
+++ b/fs/dlm/ast.h
@@ -1,7 +1,7 @@
 /******************************************************************************
 *******************************************************************************
 **
-**  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2005-2010 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -13,7 +13,7 @@
 #ifndef __ASTD_DOT_H__
 #define __ASTD_DOT_H__
 
-void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode);
+void dlm_add_ast(struct dlm_lkb *lkb, int type, int mode);
 void dlm_del_ast(struct dlm_lkb *lkb);
 
 void dlm_astd_wake(void);
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 375a2359b3bf..29d6139c35fc 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -256,7 +256,7 @@ static int print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb,
                         lkb->lkb_status,
                         lkb->lkb_grmode,
                         lkb->lkb_rqmode,
-                        lkb->lkb_highbast,
+                        lkb->lkb_bastmode,
                         rsb_lookup,
                         lkb->lkb_wait_type,
                         lkb->lkb_lvbseq,
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 826d3dc6e0ab..f632b58cd222 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -2,7 +2,7 @@
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
-**  Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2004-2010 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -232,11 +232,17 @@ struct dlm_lkb {
         int8_t                  lkb_status;     /* granted, waiting, convert */
         int8_t                  lkb_rqmode;     /* requested lock mode */
         int8_t                  lkb_grmode;     /* granted lock mode */
-        int8_t                  lkb_bastmode;   /* requested mode */
         int8_t                  lkb_highbast;   /* highest mode bast sent for */
+
         int8_t                  lkb_wait_type;  /* type of reply waiting for */
         int8_t                  lkb_wait_count;
         int8_t                  lkb_ast_type;   /* type of ast queued for */
+        int8_t                  lkb_ast_first;  /* type of first ast queued */
+
+        int8_t                  lkb_bastmode;   /* req mode of queued bast */
+        int8_t                  lkb_castmode;   /* gr mode of queued cast */
+        int8_t                  lkb_bastmode_done; /* last delivered bastmode */
+        int8_t                  lkb_castmode_done; /* last delivered castmode */
 
         struct list_head        lkb_idtbl_list; /* lockspace lkbtbl */
         struct list_head        lkb_statequeue; /* rsb g/c/w list */
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 9c0c1db1e105..46ffd3eeaaf7 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1,7 +1,7 @@
 /******************************************************************************
 *******************************************************************************
 **
-**  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2005-2010 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -307,7 +307,7 @@ static void queue_cast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
         lkb->lkb_lksb->sb_status = rv;
         lkb->lkb_lksb->sb_flags = lkb->lkb_sbflags;
 
-        dlm_add_ast(lkb, AST_COMP, 0);
+        dlm_add_ast(lkb, AST_COMP, lkb->lkb_grmode);
 }
 
 static inline void queue_cast_overlap(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -320,10 +320,12 @@ static void queue_bast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rqmode)
 {
         lkb->lkb_time_bast = ktime_get();
 
-        if (is_master_copy(lkb))
+        if (is_master_copy(lkb)) {
+                lkb->lkb_bastmode = rqmode; /* printed by debugfs */
                 send_bast(r, lkb, rqmode);
-        else
+        } else {
                 dlm_add_ast(lkb, AST_BAST, rqmode);
+        }
 }
 
 /*
@@ -2280,20 +2282,30 @@ static int do_request(struct dlm_rsb *r, struct dlm_lkb *lkb)
         if (can_be_queued(lkb)) {
                 error = -EINPROGRESS;
                 add_lkb(r, lkb, DLM_LKSTS_WAITING);
-                send_blocking_asts(r, lkb);
                 add_timeout(lkb);
                 goto out;
         }
 
         error = -EAGAIN;
-        if (force_blocking_asts(lkb))
-                send_blocking_asts_all(r, lkb);
         queue_cast(r, lkb, -EAGAIN);
-
  out:
         return error;
 }
 
+static void do_request_effects(struct dlm_rsb *r, struct dlm_lkb *lkb,
+                               int error)
+{
+        switch (error) {
+        case -EAGAIN:
+                if (force_blocking_asts(lkb))
+                        send_blocking_asts_all(r, lkb);
+                break;
+        case -EINPROGRESS:
+                send_blocking_asts(r, lkb);
+                break;
+        }
+}
+
 static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
 {
         int error = 0;
@@ -2304,7 +2316,6 @@ static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
         if (can_be_granted(r, lkb, 1, &deadlk)) {
                 grant_lock(r, lkb);
                 queue_cast(r, lkb, 0);
-                grant_pending_locks(r);
                 goto out;
         }
 
@@ -2334,7 +2345,6 @@ static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
                 if (_can_be_granted(r, lkb, 1)) {
                         grant_lock(r, lkb);
                         queue_cast(r, lkb, 0);
-                        grant_pending_locks(r);
                         goto out;
                 }
                 /* else fall through and move to convert queue */
@@ -2344,28 +2354,47 @@ static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
                 error = -EINPROGRESS;
                 del_lkb(r, lkb);
                 add_lkb(r, lkb, DLM_LKSTS_CONVERT);
-                send_blocking_asts(r, lkb);
                 add_timeout(lkb);
                 goto out;
         }
 
         error = -EAGAIN;
-        if (force_blocking_asts(lkb))
-                send_blocking_asts_all(r, lkb);
         queue_cast(r, lkb, -EAGAIN);
-
  out:
         return error;
 }
 
+static void do_convert_effects(struct dlm_rsb *r, struct dlm_lkb *lkb,
+                               int error)
+{
+        switch (error) {
+        case 0:
+                grant_pending_locks(r);
+                /* grant_pending_locks also sends basts */
+                break;
+        case -EAGAIN:
+                if (force_blocking_asts(lkb))
+                        send_blocking_asts_all(r, lkb);
+                break;
+        case -EINPROGRESS:
+                send_blocking_asts(r, lkb);
+                break;
+        }
+}
+
 static int do_unlock(struct dlm_rsb *r, struct dlm_lkb *lkb)
 {
         remove_lock(r, lkb);
         queue_cast(r, lkb, -DLM_EUNLOCK);
-        grant_pending_locks(r);
         return -DLM_EUNLOCK;
 }
 
+static void do_unlock_effects(struct dlm_rsb *r, struct dlm_lkb *lkb,
+                              int error)
+{
+        grant_pending_locks(r);
+}
+
 /* returns: 0 did nothing, -DLM_ECANCEL canceled lock */
  
 static int do_cancel(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -2375,12 +2404,18 @@ static int do_cancel(struct dlm_rsb *r, struct dlm_lkb *lkb)
         error = revert_lock(r, lkb);
         if (error) {
                 queue_cast(r, lkb, -DLM_ECANCEL);
-                grant_pending_locks(r);
                 return -DLM_ECANCEL;
         }
         return 0;
 }
 
+static void do_cancel_effects(struct dlm_rsb *r, struct dlm_lkb *lkb,
+                              int error)
+{
+        if (error)
+                grant_pending_locks(r);
+}
+
 /*
  * Four stage 3 varieties:
  * _request_lock(), _convert_lock(), _unlock_lock(), _cancel_lock()
@@ -2402,11 +2437,15 @@ static int _request_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
                 goto out;
         }
 
-        if (is_remote(r))
+        if (is_remote(r)) {
                 /* receive_request() calls do_request() on remote node */
                 error = send_request(r, lkb);
-        else
+        } else {
                 error = do_request(r, lkb);
+                /* for remote locks the request_reply is sent
+                   between do_request and do_request_effects */
+                do_request_effects(r, lkb, error);
+        }
  out:
         return error;
 }
@@ -2417,11 +2456,15 @@ static int _convert_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
 {
         int error;
 
-        if (is_remote(r))
+        if (is_remote(r)) {
                 /* receive_convert() calls do_convert() on remote node */
                 error = send_convert(r, lkb);
-        else
+        } else {
                 error = do_convert(r, lkb);
+                /* for remote locks the convert_reply is sent
+                   between do_convert and do_convert_effects */
+                do_convert_effects(r, lkb, error);
+        }
 
         return error;
 }
@@ -2432,11 +2475,15 @@ static int _unlock_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
 {
         int error;
 
-        if (is_remote(r))
+        if (is_remote(r)) {
                 /* receive_unlock() calls do_unlock() on remote node */
                 error = send_unlock(r, lkb);
-        else
+        } else {
                 error = do_unlock(r, lkb);
+                /* for remote locks the unlock_reply is sent
+                   between do_unlock and do_unlock_effects */
+                do_unlock_effects(r, lkb, error);
+        }
 
         return error;
 }
@@ -2447,11 +2494,15 @@ static int _cancel_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
 {
         int error;
 
-        if (is_remote(r))
+        if (is_remote(r)) {
                 /* receive_cancel() calls do_cancel() on remote node */
                 error = send_cancel(r, lkb);
-        else
+        } else {
                 error = do_cancel(r, lkb);
+                /* for remote locks the cancel_reply is sent
+                   between do_cancel and do_cancel_effects */
+                do_cancel_effects(r, lkb, error);
+        }
 
         return error;
 }
@@ -3191,6 +3242,7 @@ static void receive_request(struct dlm_ls *ls, struct dlm_message *ms)
         attach_lkb(r, lkb);
         error = do_request(r, lkb);
         send_request_reply(r, lkb, error);
+        do_request_effects(r, lkb, error);
 
         unlock_rsb(r);
         put_rsb(r);
@@ -3226,15 +3278,19 @@ static void receive_convert(struct dlm_ls *ls, struct dlm_message *ms)
                 goto out;
 
         receive_flags(lkb, ms);
+
         error = receive_convert_args(ls, lkb, ms);
-        if (error)
-                goto out_reply;
+        if (error) {
+                send_convert_reply(r, lkb, error);
+                goto out;
+        }
+
         reply = !down_conversion(lkb);
 
         error = do_convert(r, lkb);
- out_reply:
         if (reply)
                 send_convert_reply(r, lkb, error);
+        do_convert_effects(r, lkb, error);
  out:
         unlock_rsb(r);
         put_rsb(r);
@@ -3266,13 +3322,16 @@ static void receive_unlock(struct dlm_ls *ls, struct dlm_message *ms)
                 goto out;
 
         receive_flags(lkb, ms);
+
         error = receive_unlock_args(ls, lkb, ms);
-        if (error)
-                goto out_reply;
+        if (error) {
+                send_unlock_reply(r, lkb, error);
+                goto out;
+        }
 
         error = do_unlock(r, lkb);
- out_reply:
         send_unlock_reply(r, lkb, error);
+        do_unlock_effects(r, lkb, error);
  out:
         unlock_rsb(r);
         put_rsb(r);
@@ -3307,6 +3366,7 @@ static void receive_cancel(struct dlm_ls *ls, struct dlm_message *ms)
 
         error = do_cancel(r, lkb);
         send_cancel_reply(r, lkb, error);
+        do_cancel_effects(r, lkb, error);
  out:
         unlock_rsb(r);
         put_rsb(r);
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index c010ecfc0d29..26a8bd40400a 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -191,6 +191,18 @@ static int do_uevent(struct dlm_ls *ls, int in)
         return error;
 }
 
+static int dlm_uevent(struct kset *kset, struct kobject *kobj,
+                      struct kobj_uevent_env *env)
+{
+        struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);
+
+        add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name);
+        return 0;
+}
+
+static struct kset_uevent_ops dlm_uevent_ops = {
+        .uevent = dlm_uevent,
+};
 
 int __init dlm_lockspace_init(void)
 {
@@ -199,7 +211,7 @@ int __init dlm_lockspace_init(void)
         INIT_LIST_HEAD(&lslist);
         spin_lock_init(&lslist_lock);
 
-        dlm_kset = kset_create_and_add("dlm", NULL, kernel_kobj);
+        dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj);
         if (!dlm_kset) {
                 printk(KERN_WARNING "%s: can not create kset\n", __func__);
                 return -ENOMEM;
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index e73a4bb572aa..a4bfd31ac45b 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2009 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2006-2010 Red Hat, Inc.  All rights reserved.
  *
  * This copyrighted material is made available to anyone wishing to use,
  * modify, copy, or redistribute it subject to the terms and conditions
@@ -173,7 +173,7 @@ static int lkb_is_endoflife(struct dlm_lkb *lkb, int sb_status, int type)
 /* we could possibly check if the cancel of an orphan has resulted in the lkb
    being removed and then remove that lkb from the orphans list and free it */
 
-void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
+void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int mode)
 {
         struct dlm_ls *ls;
         struct dlm_user_args *ua;
@@ -206,8 +206,10 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
 
         ast_type = lkb->lkb_ast_type;
         lkb->lkb_ast_type |= type;
-        if (bastmode)
-                lkb->lkb_bastmode = bastmode;
+        if (type == AST_BAST)
+                lkb->lkb_bastmode = mode;
+        else
+                lkb->lkb_castmode = mode;
 
         if (!ast_type) {
                 kref_get(&lkb->lkb_ref);
diff --git a/fs/dlm/user.h b/fs/dlm/user.h
index 1c9686492286..f196091dd7ff 100644
--- a/fs/dlm/user.h
+++ b/fs/dlm/user.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2008 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2006-2010 Red Hat, Inc.  All rights reserved.
  *
  * This copyrighted material is made available to anyone wishing to use,
  * modify, copy, or redistribute it subject to the terms and conditions
@@ -9,7 +9,7 @@
 #ifndef __USER_DOT_H__
 #define __USER_DOT_H__
 
-void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int bastmode);
+void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int mode);
 int dlm_user_init(void);
 void dlm_user_exit(void);
 int dlm_device_deregister(struct dlm_ls *ls);
diff --git a/fs/exec.c b/fs/exec.c
index e95c692ef0e4..cce6bbdbdbb1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -637,7 +637,6 @@ int setup_arg_pages(struct linux_binprm *bprm,
          * will align it up.
          */
         rlim_stack = rlimit(RLIMIT_STACK) & PAGE_MASK;
-        rlim_stack = min(rlim_stack, stack_size);
 #ifdef CONFIG_STACK_GROWSUP
         if (stack_size + stack_expand > rlim_stack)
                 stack_base = vma->vm_start + rlim_stack;
diff --git a/fs/exofs/common.h b/fs/exofs/common.h
index b1b178e61718..f0d520312d8b 100644
--- a/fs/exofs/common.h
+++ b/fs/exofs/common.h
@@ -55,6 +55,8 @@
 /* exofs Application specific page/attribute */
 # define EXOFS_APAGE_FS_DATA    (OSD_APAGE_APP_DEFINED_FIRST + 3)
 # define EXOFS_ATTR_INODE_DATA  1
+# define EXOFS_ATTR_INODE_FILE_LAYOUT   2
+# define EXOFS_ATTR_INODE_DIR_LAYOUT    3
 
 /*
  * The maximum number of files we can have is limited by the size of the
@@ -206,4 +208,41 @@ enum {
         (((name_len) + offsetof(struct exofs_dir_entry, name)  + \
           EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND)
 
+/*
+ * The on-disk (optional) layout structure.
+ * sits in an EXOFS_ATTR_INODE_FILE_LAYOUT or EXOFS_ATTR_INODE_DIR_LAYOUT
+ * attribute, attached to any inode, usually to a directory.
+ */
+
+enum exofs_inode_layout_gen_functions {
+        LAYOUT_MOVING_WINDOW = 0,
+        LAYOUT_IMPLICT = 1,
+};
+
+struct exofs_on_disk_inode_layout {
+        __le16 gen_func; /* One of enum exofs_inode_layout_gen_functions */
+        __le16 pad;
+        union {
+                /* gen_func == LAYOUT_MOVING_WINDOW (default) */
+                struct exofs_layout_sliding_window {
+                        __le32 num_devices; /* first n devices in global-table*/
+                } sliding_window __packed;
+
+                /* gen_func == LAYOUT_IMPLICT */
+                struct exofs_layout_implict_list {
+                        struct exofs_dt_data_map data_map;
+                        /* Variable array of size data_map.cb_num_comps. These
+                         * are device indexes of the devices in the global table
+                         */
+                        __le32 dev_indexes[];
+                } implict __packed;
+        };
+} __packed;
+
+static inline size_t exofs_on_disk_inode_layout_size(unsigned max_devs)
+{
+        return sizeof(struct exofs_on_disk_inode_layout) +
+                max_devs * sizeof(__le32);
+}
+
 #endif /*ifndef __EXOFS_COM_H__*/
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index c35fd4623986..59b8bf2825c7 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -55,12 +55,28 @@
 /* u64 has problems with printk this will cast it to unsigned long long */
 #define _LLU(x) (unsigned long long)(x)
 
+struct exofs_layout {
+        osd_id          s_pid;                  /* partition ID of file system*/
+
+        /* Our way of looking at the data_map */
+        unsigned stripe_unit;
+        unsigned mirrors_p1;
+
+        unsigned group_width;
+        u64      group_depth;
+        unsigned group_count;
+
+        enum exofs_inode_layout_gen_functions lay_func;
+
+        unsigned        s_numdevs;              /* Num of devices in array    */
+        struct osd_dev  *s_ods[0];              /* Variable length            */
+};
+
 /*
  * our extension to the in-memory superblock
  */
 struct exofs_sb_info {
         struct exofs_fscb s_fscb;               /* Written often, pre-allocate*/
-        osd_id          s_pid;                  /* partition ID of file system*/
         int             s_timeout;              /* timeout for OSD operations */
         uint64_t        s_nextid;               /* highest object ID used     */
         uint32_t        s_numfiles;             /* number of files on fs      */
@@ -69,22 +85,27 @@ struct exofs_sb_info {
         atomic_t        s_curr_pending;         /* number of pending commands */
         uint8_t         s_cred[OSD_CAP_LEN];    /* credential for the fscb    */
 
-        struct pnfs_osd_data_map data_map;      /* Default raid to use        */
-        unsigned        s_numdevs;              /* Num of devices in array    */
-        struct osd_dev  *s_ods[1];              /* Variable length, minimum 1 */
+        struct pnfs_osd_data_map data_map;      /* Default raid to use
+                                                 * FIXME: Needed ?
+                                                 */
+/*      struct exofs_layout     dir_layout;*/   /* Default dir layout */
+        struct exofs_layout     layout;         /* Default files layout,
+                                                 * contains the variable osd_dev
+                                                 * array. Keep last */
+        struct osd_dev  *_min_one_dev[1];       /* Place holder for one dev   */
 };
 
 /*
  * our extension to the in-memory inode
  */
 struct exofs_i_info {
+        struct inode   vfs_inode;          /* normal in-memory inode          */
+        wait_queue_head_t i_wq;            /* wait queue for inode            */
         unsigned long  i_flags;            /* various atomic flags            */
         uint32_t       i_data[EXOFS_IDATA];/*short symlink names and device #s*/
         uint32_t       i_dir_start_lookup; /* which page to start lookup      */
-        wait_queue_head_t i_wq;            /* wait queue for inode            */
         uint64_t       i_commit_size;      /* the object's written length     */
         uint8_t        i_cred[OSD_CAP_LEN];/* all-powerful credential         */
-        struct inode   vfs_inode;          /* normal in-memory inode          */
 };
 
 static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
@@ -101,7 +122,7 @@ struct exofs_io_state {
         void                    *private;
         exofs_io_done_fn        done;
 
-        struct exofs_sb_info    *sbi;
+        struct exofs_layout     *layout;
         struct osd_obj_id       obj;
         u8                      *cred;
 
@@ -109,7 +130,11 @@ struct exofs_io_state {
         loff_t                  offset;
         unsigned long           length;
         void                    *kern_buff;
-        struct bio              *bio;
+
+        struct page             **pages;
+        unsigned                nr_pages;
+        unsigned                pgbase;
+        unsigned                pages_consumed;
 
         /* Attributes */
         unsigned                in_attr_len;
@@ -122,6 +147,9 @@ struct exofs_io_state {
         struct exofs_per_dev_state {
                 struct osd_request *or;
                 struct bio *bio;
+                loff_t offset;
+                unsigned length;
+                unsigned dev;
         } per_dev[];
 };
 
@@ -175,6 +203,12 @@ static inline struct exofs_i_info *exofs_i(struct inode *inode)
 }
 
 /*
+ * Given a layout, object_number and stripe_index return the associated global
+ * dev_index
+ */
+unsigned exofs_layout_od_id(struct exofs_layout *layout,
+                            osd_id obj_no, unsigned layout_index);
+/*
  * Maximum count of links to a file
  */
 #define EXOFS_LINK_MAX           32000
@@ -189,7 +223,8 @@ void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
 int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
                     u64 offset, void *p, unsigned length);
 
-int  exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** ios);
+int  exofs_get_io_state(struct exofs_layout *layout,
+                        struct exofs_io_state **ios);
 void exofs_put_io_state(struct exofs_io_state *ios);
 
 int exofs_check_io(struct exofs_io_state *ios, u64 *resid);
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index 2afbcebeda71..5514f3c2c2f4 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -41,16 +41,18 @@
 
 enum { BIO_MAX_PAGES_KMALLOC =
                 (PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec),
+        MAX_PAGES_KMALLOC =
+                PAGE_SIZE / sizeof(struct page *),
 };
 
 struct page_collect {
         struct exofs_sb_info *sbi;
-        struct request_queue *req_q;
         struct inode *inode;
         unsigned expected_pages;
         struct exofs_io_state *ios;
 
-        struct bio *bio;
+        struct page **pages;
+        unsigned alloc_pages;
         unsigned nr_pages;
         unsigned long length;
         loff_t pg_first; /* keep 64bit also in 32-arches */
@@ -62,15 +64,12 @@ static void _pcol_init(struct page_collect *pcol, unsigned expected_pages,
         struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
 
         pcol->sbi = sbi;
-        /* Create master bios on first Q, later on cloning, each clone will be
-         * allocated on it's destination Q
-         */
-        pcol->req_q = osd_request_queue(sbi->s_ods[0]);
         pcol->inode = inode;
         pcol->expected_pages = expected_pages;
 
         pcol->ios = NULL;
-        pcol->bio = NULL;
+        pcol->pages = NULL;
+        pcol->alloc_pages = 0;
         pcol->nr_pages = 0;
         pcol->length = 0;
         pcol->pg_first = -1;
@@ -80,7 +79,8 @@ static void _pcol_reset(struct page_collect *pcol)
 {
         pcol->expected_pages -= min(pcol->nr_pages, pcol->expected_pages);
 
-        pcol->bio = NULL;
+        pcol->pages = NULL;
+        pcol->alloc_pages = 0;
         pcol->nr_pages = 0;
         pcol->length = 0;
         pcol->pg_first = -1;
@@ -90,38 +90,43 @@ static void _pcol_reset(struct page_collect *pcol)
          * it might not end here. don't be left with nothing
          */
         if (!pcol->expected_pages)
-                pcol->expected_pages = BIO_MAX_PAGES_KMALLOC;
+                pcol->expected_pages = MAX_PAGES_KMALLOC;
 }
 
 static int pcol_try_alloc(struct page_collect *pcol)
 {
-        int pages = min_t(unsigned, pcol->expected_pages,
-                          BIO_MAX_PAGES_KMALLOC);
+        unsigned pages = min_t(unsigned, pcol->expected_pages,
+                          MAX_PAGES_KMALLOC);
 
         if (!pcol->ios) { /* First time allocate io_state */
-                int ret = exofs_get_io_state(pcol->sbi, &pcol->ios);
+                int ret = exofs_get_io_state(&pcol->sbi->layout, &pcol->ios);
 
                 if (ret)
                         return ret;
         }
 
+        /* TODO: easily support bio chaining */
+        pages =  min_t(unsigned, pages,
+                       pcol->sbi->layout.group_width * BIO_MAX_PAGES_KMALLOC);
+
         for (; pages; pages >>= 1) {
-                pcol->bio = bio_kmalloc(GFP_KERNEL, pages);
-                if (likely(pcol->bio))
+                pcol->pages = kmalloc(pages * sizeof(struct page *),
+                                      GFP_KERNEL);
+                if (likely(pcol->pages)) {
+                        pcol->alloc_pages = pages;
                         return 0;
+                }
         }
 
-        EXOFS_ERR("Failed to bio_kmalloc expected_pages=%u\n",
+        EXOFS_ERR("Failed to kmalloc expected_pages=%u\n",
                   pcol->expected_pages);
         return -ENOMEM;
 }
 
 static void pcol_free(struct page_collect *pcol)
 {
-        if (pcol->bio) {
-                bio_put(pcol->bio);
-                pcol->bio = NULL;
-        }
+        kfree(pcol->pages);
+        pcol->pages = NULL;
 
         if (pcol->ios) {
                 exofs_put_io_state(pcol->ios);
@@ -132,11 +137,10 @@ static void pcol_free(struct page_collect *pcol)
 static int pcol_add_page(struct page_collect *pcol, struct page *page,
                          unsigned len)
 {
-        int added_len = bio_add_pc_page(pcol->req_q, pcol->bio, page, len, 0);
-        if (unlikely(len != added_len))
+        if (unlikely(pcol->nr_pages >= pcol->alloc_pages))
                 return -ENOMEM;
 
-        ++pcol->nr_pages;
+        pcol->pages[pcol->nr_pages++] = page;
         pcol->length += len;
         return 0;
 }
@@ -181,7 +185,6 @@ static void update_write_page(struct page *page, int ret)
  */
 static int __readpages_done(struct page_collect *pcol, bool do_unlock)
 {
-        struct bio_vec *bvec;
         int i;
         u64 resid;
         u64 good_bytes;
@@ -193,13 +196,13 @@ static int __readpages_done(struct page_collect *pcol, bool do_unlock)
         else
                 good_bytes = pcol->length - resid;
 
-        EXOFS_DBGMSG("readpages_done(0x%lx) good_bytes=0x%llx"
+        EXOFS_DBGMSG2("readpages_done(0x%lx) good_bytes=0x%llx"
                      " length=0x%lx nr_pages=%u\n",
                      pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
                      pcol->nr_pages);
 
-        __bio_for_each_segment(bvec, pcol->bio, i, 0) {
-                struct page *page = bvec->bv_page;
+        for (i = 0; i < pcol->nr_pages; i++) {
+                struct page *page = pcol->pages[i];
                 struct inode *inode = page->mapping->host;
                 int page_stat;
 
@@ -218,11 +221,11 @@ static int __readpages_done(struct page_collect *pcol, bool do_unlock)
                 ret = update_read_page(page, page_stat);
                 if (do_unlock)
                         unlock_page(page);
-                length += bvec->bv_len;
+                length += PAGE_SIZE;
         }
 
         pcol_free(pcol);
-        EXOFS_DBGMSG("readpages_done END\n");
+        EXOFS_DBGMSG2("readpages_done END\n");
         return ret;
 }
 
@@ -238,11 +241,10 @@ static void readpages_done(struct exofs_io_state *ios, void *p)
 
 static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw)
 {
-        struct bio_vec *bvec;
         int i;
 
-        __bio_for_each_segment(bvec, pcol->bio, i, 0) {
-                struct page *page = bvec->bv_page;
+        for (i = 0; i < pcol->nr_pages; i++) {
+                struct page *page = pcol->pages[i];
 
                 if (rw == READ)
                         update_read_page(page, ret);
@@ -260,13 +262,14 @@ static int read_exec(struct page_collect *pcol, bool is_sync)
         struct page_collect *pcol_copy = NULL;
         int ret;
 
-        if (!pcol->bio)
+        if (!pcol->pages)
                 return 0;
 
         /* see comment in _readpage() about sync reads */
         WARN_ON(is_sync && (pcol->nr_pages != 1));
 
-        ios->bio = pcol->bio;
+        ios->pages = pcol->pages;
+        ios->nr_pages = pcol->nr_pages;
         ios->length = pcol->length;
         ios->offset = pcol->pg_first << PAGE_CACHE_SHIFT;
 
@@ -290,7 +293,7 @@ static int read_exec(struct page_collect *pcol, bool is_sync)
 
         atomic_inc(&pcol->sbi->s_curr_pending);
 
-        EXOFS_DBGMSG("read_exec obj=0x%llx start=0x%llx length=0x%lx\n",
+        EXOFS_DBGMSG2("read_exec obj=0x%llx start=0x%llx length=0x%lx\n",
                   ios->obj.id, _LLU(ios->offset), pcol->length);
 
         /* pages ownership was passed to pcol_copy */
@@ -366,7 +369,7 @@ try_again:
                 goto try_again;
         }
 
-        if (!pcol->bio) {
+        if (!pcol->pages) {
                 ret = pcol_try_alloc(pcol);
                 if (unlikely(ret))
                         goto fail;
@@ -448,7 +451,6 @@ static int exofs_readpage(struct file *file, struct page *page)
 static void writepages_done(struct exofs_io_state *ios, void *p)
 {
         struct page_collect *pcol = p;
-        struct bio_vec *bvec;
         int i;
         u64 resid;
         u64  good_bytes;
@@ -462,13 +464,13 @@ static void writepages_done(struct exofs_io_state *ios, void *p)
         else
                 good_bytes = pcol->length - resid;
 
-        EXOFS_DBGMSG("writepages_done(0x%lx) good_bytes=0x%llx"
+        EXOFS_DBGMSG2("writepages_done(0x%lx) good_bytes=0x%llx"
                      " length=0x%lx nr_pages=%u\n",
                      pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
                      pcol->nr_pages);
 
-        __bio_for_each_segment(bvec, pcol->bio, i, 0) {
-                struct page *page = bvec->bv_page;
+        for (i = 0; i < pcol->nr_pages; i++) {
+                struct page *page = pcol->pages[i];
                 struct inode *inode = page->mapping->host;
                 int page_stat;
 
@@ -485,12 +487,12 @@ static void writepages_done(struct exofs_io_state *ios, void *p)
                 EXOFS_DBGMSG2("    writepages_done(0x%lx, 0x%lx) status=%d\n",
                              inode->i_ino, page->index, page_stat);
 
-                length += bvec->bv_len;
+                length += PAGE_SIZE;
         }
 
         pcol_free(pcol);
         kfree(pcol);
-        EXOFS_DBGMSG("writepages_done END\n");
+        EXOFS_DBGMSG2("writepages_done END\n");
 }
 
 static int write_exec(struct page_collect *pcol)
@@ -500,7 +502,7 @@ static int write_exec(struct page_collect *pcol)
         struct page_collect *pcol_copy = NULL;
         int ret;
 
-        if (!pcol->bio)
+        if (!pcol->pages)
                 return 0;
 
         pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL);
@@ -512,9 +514,8 @@ static int write_exec(struct page_collect *pcol)
 
         *pcol_copy = *pcol;
 
-        pcol_copy->bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
-
-        ios->bio = pcol_copy->bio;
+        ios->pages = pcol_copy->pages;
+        ios->nr_pages = pcol_copy->nr_pages;
         ios->offset = pcol_copy->pg_first << PAGE_CACHE_SHIFT;
         ios->length = pcol_copy->length;
         ios->done = writepages_done;
@@ -527,7 +528,7 @@ static int write_exec(struct page_collect *pcol)
         }
 
         atomic_inc(&pcol->sbi->s_curr_pending);
-        EXOFS_DBGMSG("write_exec(0x%lx, 0x%llx) start=0x%llx length=0x%lx\n",
+        EXOFS_DBGMSG2("write_exec(0x%lx, 0x%llx) start=0x%llx length=0x%lx\n",
                   pcol->inode->i_ino, pcol->pg_first, _LLU(ios->offset),
                   pcol->length);
         /* pages ownership was passed to pcol_copy */
@@ -605,7 +606,7 @@ try_again:
                 goto try_again;
         }
 
-        if (!pcol->bio) {
+        if (!pcol->pages) {
                 ret = pcol_try_alloc(pcol);
                 if (unlikely(ret))
                         goto fail;
@@ -616,7 +617,7 @@ try_again:
 
         ret = pcol_add_page(pcol, page, len);
         if (unlikely(ret)) {
-                EXOFS_DBGMSG("Failed pcol_add_page "
+                EXOFS_DBGMSG2("Failed pcol_add_page "
                              "nr_pages=%u total_length=0x%lx\n",
                              pcol->nr_pages, pcol->length);
 
@@ -663,7 +664,7 @@ static int exofs_writepages(struct address_space *mapping,
         if (expected_pages < 32L)
                 expected_pages = 32L;
 
-        EXOFS_DBGMSG("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx "
+        EXOFS_DBGMSG2("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx "
                      "nrpages=%lu start=0x%lx end=0x%lx expected_pages=%ld\n",
                      mapping->host->i_ino, wbc->range_start, wbc->range_end,
                      mapping->nrpages, start, end, expected_pages);
@@ -859,20 +860,33 @@ int exofs_setattr(struct dentry *dentry, struct iattr *iattr)
         return error;
 }
 
+static const struct osd_attr g_attr_inode_file_layout = ATTR_DEF(
+        EXOFS_APAGE_FS_DATA,
+        EXOFS_ATTR_INODE_FILE_LAYOUT,
+        0);
+static const struct osd_attr g_attr_inode_dir_layout = ATTR_DEF(
+        EXOFS_APAGE_FS_DATA,
+        EXOFS_ATTR_INODE_DIR_LAYOUT,
+        0);
+
 /*
- * Read an inode from the OSD, and return it as is.  We also return the size
- * attribute in the 'obj_size' argument.
+ * Read the Linux inode info from the OSD, and return it as is. In exofs the
+ * inode info is in an application specific page/attribute of the osd-object.
  */
 static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi,
-                    struct exofs_fcb *inode, uint64_t *obj_size)
+                    struct exofs_fcb *inode)
 {
         struct exofs_sb_info *sbi = sb->s_fs_info;
-        struct osd_attr attrs[2];
+        struct osd_attr attrs[] = {
+                [0] = g_attr_inode_data,
+                [1] = g_attr_inode_file_layout,
+                [2] = g_attr_inode_dir_layout,
+        };
         struct exofs_io_state *ios;
+        struct exofs_on_disk_inode_layout *layout;
         int ret;
 
-        *obj_size = ~0;
-        ret = exofs_get_io_state(sbi, &ios);
+        ret = exofs_get_io_state(&sbi->layout, &ios);
         if (unlikely(ret)) {
                 EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__);
                 return ret;
@@ -882,14 +896,25 @@ static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi,
         exofs_make_credential(oi->i_cred, &ios->obj);
         ios->cred = oi->i_cred;
 
-        attrs[0] = g_attr_inode_data;
-        attrs[1] = g_attr_logical_length;
+        attrs[1].len = exofs_on_disk_inode_layout_size(sbi->layout.s_numdevs);
+        attrs[2].len = exofs_on_disk_inode_layout_size(sbi->layout.s_numdevs);
+
         ios->in_attr = attrs;
         ios->in_attr_len = ARRAY_SIZE(attrs);
 
         ret = exofs_sbi_read(ios);
-        if (ret)
+        if (unlikely(ret)) {
+                EXOFS_ERR("object(0x%llx) corrupted, return empty file=>%d\n",
+                          _LLU(ios->obj.id), ret);
+                memset(inode, 0, sizeof(*inode));
+                inode->i_mode = 0040000 | (0777 & ~022);
+                /* If object is lost on target we might as well enable it's
+                 * delete.
+                 */
+                if ((ret == -ENOENT) || (ret == -EINVAL))
+                        ret = 0;
                 goto out;
+        }
 
         ret = extract_attr_from_ios(ios, &attrs[0]);
         if (ret) {
@@ -901,11 +926,33 @@ static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi,
 
         ret = extract_attr_from_ios(ios, &attrs[1]);
         if (ret) {
-                EXOFS_ERR("%s: extract_attr of logical_length failed\n",
-                          __func__);
+                EXOFS_ERR("%s: extract_attr of inode_data failed\n", __func__);
+                goto out;
+        }
+        if (attrs[1].len) {
+                layout = attrs[1].val_ptr;
+                if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) {
+                        EXOFS_ERR("%s: unsupported files layout %d\n",
+                                __func__, layout->gen_func);
+                        ret = -ENOTSUPP;
+                        goto out;
+                }
+        }
+
+        ret = extract_attr_from_ios(ios, &attrs[2]);
+        if (ret) {
+                EXOFS_ERR("%s: extract_attr of inode_data failed\n", __func__);
                 goto out;
         }
-        *obj_size = get_unaligned_be64(attrs[1].val_ptr);
+        if (attrs[2].len) {
+                layout = attrs[2].val_ptr;
+                if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) {
+                        EXOFS_ERR("%s: unsupported meta-data layout %d\n",
+                                __func__, layout->gen_func);
+                        ret = -ENOTSUPP;
+                        goto out;
+                }
+        }
 
 out:
         exofs_put_io_state(ios);
@@ -925,7 +972,6 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
         struct exofs_i_info *oi;
         struct exofs_fcb fcb;
         struct inode *inode;
-        uint64_t obj_size;
         int ret;
 
         inode = iget_locked(sb, ino);
@@ -937,7 +983,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
         __oi_init(oi);
 
         /* read the inode from the osd */
-        ret = exofs_get_inode(sb, oi, &fcb, &obj_size);
+        ret = exofs_get_inode(sb, oi, &fcb);
         if (ret)
                 goto bad_inode;
 
@@ -958,13 +1004,6 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
         inode->i_blkbits = EXOFS_BLKSHIFT;
         inode->i_generation = le32_to_cpu(fcb.i_generation);
 
-        if ((inode->i_size != obj_size) &&
-                (!exofs_inode_is_fast_symlink(inode))) {
-                EXOFS_ERR("WARNING: Size of inode=%llu != object=%llu\n",
-                          inode->i_size, _LLU(obj_size));
-                /* FIXME: call exofs_inode_recovery() */
-        }
-
         oi->i_dir_start_lookup = 0;
 
         if ((inode->i_nlink == 0) && (inode->i_mode == 0)) {
@@ -1043,7 +1082,7 @@ static void create_done(struct exofs_io_state *ios, void *p)
 
         if (unlikely(ret)) {
                 EXOFS_ERR("object=0x%llx creation faild in pid=0x%llx",
-                          _LLU(exofs_oi_objno(oi)), _LLU(sbi->s_pid));
+                          _LLU(exofs_oi_objno(oi)), _LLU(sbi->layout.s_pid));
                 /*TODO: When FS is corrupted creation can fail, object already
                  * exist. Get rid of this asynchronous creation, if exist
                  * increment the obj counter and try the next object. Until we
@@ -1104,7 +1143,7 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
 
         mark_inode_dirty(inode);
 
-        ret = exofs_get_io_state(sbi, &ios);
+        ret = exofs_get_io_state(&sbi->layout, &ios);
         if (unlikely(ret)) {
                 EXOFS_ERR("exofs_new_inode: exofs_get_io_state failed\n");
                 return ERR_PTR(ret);
@@ -1170,8 +1209,10 @@ static int exofs_update_inode(struct inode *inode, int do_sync)
         int ret;
 
         args = kzalloc(sizeof(*args), GFP_KERNEL);
-        if (!args)
+        if (!args) {
+                EXOFS_DBGMSG("Faild kzalloc of args\n");
                 return -ENOMEM;
+        }
 
         fcb = &args->fcb;
 
@@ -1200,7 +1241,7 @@ static int exofs_update_inode(struct inode *inode, int do_sync)
         } else
                 memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data));
 
-        ret = exofs_get_io_state(sbi, &ios);
+        ret = exofs_get_io_state(&sbi->layout, &ios);
         if (unlikely(ret)) {
                 EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__);
                 goto free_args;
@@ -1234,7 +1275,8 @@ static int exofs_update_inode(struct inode *inode, int do_sync)
 free_args:
         kfree(args);
 out:
-        EXOFS_DBGMSG("ret=>%d\n", ret);
+        EXOFS_DBGMSG("(0x%lx) do_sync=%d ret=>%d\n",
+                     inode->i_ino, do_sync, ret);
         return ret;
 }
 
@@ -1283,7 +1325,7 @@ void exofs_delete_inode(struct inode *inode)
 
         clear_inode(inode);
 
-        ret = exofs_get_io_state(sbi, &ios);
+        ret = exofs_get_io_state(&sbi->layout, &ios);
         if (unlikely(ret)) {
                 EXOFS_ERR("%s: exofs_get_io_state failed\n", __func__);
                 return;
diff --git a/fs/exofs/ios.c b/fs/exofs/ios.c
index 5bad01fa1f9f..5293bc411d17 100644
--- a/fs/exofs/ios.c
+++ b/fs/exofs/ios.c
@@ -23,9 +23,13 @@
  */
 
 #include <scsi/scsi_device.h>
+#include <asm/div64.h>
 
 #include "exofs.h"
 
+#define EXOFS_DBGMSG2(M...) do {} while (0)
+/* #define EXOFS_DBGMSG2 EXOFS_DBGMSG */
+
 void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
 {
         osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
@@ -64,21 +68,24 @@ out:
         return ret;
 }
 
-int exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** pios)
+int exofs_get_io_state(struct exofs_layout *layout,
+                       struct exofs_io_state **pios)
 {
         struct exofs_io_state *ios;
 
         /*TODO: Maybe use kmem_cach per sbi of size
-         * exofs_io_state_size(sbi->s_numdevs)
+         * exofs_io_state_size(layout->s_numdevs)
          */
-        ios = kzalloc(exofs_io_state_size(sbi->s_numdevs), GFP_KERNEL);
+        ios = kzalloc(exofs_io_state_size(layout->s_numdevs), GFP_KERNEL);
         if (unlikely(!ios)) {
+                EXOFS_DBGMSG("Faild kzalloc bytes=%d\n",
+                             exofs_io_state_size(layout->s_numdevs));
                 *pios = NULL;
                 return -ENOMEM;
         }
 
-        ios->sbi = sbi;
-        ios->obj.partition = sbi->s_pid;
+        ios->layout = layout;
+        ios->obj.partition = layout->s_pid;
         *pios = ios;
         return 0;
 }
@@ -101,6 +108,29 @@ void exofs_put_io_state(struct exofs_io_state *ios)
         }
 }
 
+unsigned exofs_layout_od_id(struct exofs_layout *layout,
+                            osd_id obj_no, unsigned layout_index)
+{
+/*      switch (layout->lay_func) {
+        case LAYOUT_MOVING_WINDOW:
+        {*/
+                unsigned dev_mod = obj_no;
+
+                return (layout_index + dev_mod * layout->mirrors_p1) %
+                                                              layout->s_numdevs;
+/*      }
+        case LAYOUT_FUNC_IMPLICT:
+                return layout->devs[layout_index];
+        }*/
+}
+
+static inline struct osd_dev *exofs_ios_od(struct exofs_io_state *ios,
+                                           unsigned layout_index)
+{
+        return ios->layout->s_ods[
+                exofs_layout_od_id(ios->layout, ios->obj.id, layout_index)];
+}
+
 static void _sync_done(struct exofs_io_state *ios, void *p)
 {
         struct completion *waiting = p;
@@ -168,6 +198,21 @@ static int exofs_io_execute(struct exofs_io_state *ios)
         return ret;
 }
 
+static void _clear_bio(struct bio *bio)
+{
+        struct bio_vec *bv;
+        unsigned i;
+
+        __bio_for_each_segment(bv, bio, i, 0) {
+                unsigned this_count = bv->bv_len;
+
+                if (likely(PAGE_SIZE == this_count))
+                        clear_highpage(bv->bv_page);
+                else
+                        zero_user(bv->bv_page, bv->bv_offset, this_count);
+        }
+}
+
 int exofs_check_io(struct exofs_io_state *ios, u64 *resid)
 {
         enum osd_err_priority acumulated_osd_err = 0;
@@ -176,16 +221,25 @@ int exofs_check_io(struct exofs_io_state *ios, u64 *resid)
 
         for (i = 0; i < ios->numdevs; i++) {
                 struct osd_sense_info osi;
-                int ret = osd_req_decode_sense(ios->per_dev[i].or, &osi);
+                struct osd_request *or = ios->per_dev[i].or;
+                int ret;
+
+                if (unlikely(!or))
+                        continue;
 
+                ret = osd_req_decode_sense(or, &osi);
                 if (likely(!ret))
                         continue;
 
-                if (unlikely(ret == -EFAULT)) {
-                        EXOFS_DBGMSG("%s: EFAULT Need page clear\n", __func__);
-                        /*FIXME: All the pages in this device range should:
-                         *      clear_highpage(page);
-                         */
+                if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) {
+                        /* start read offset passed endof file */
+                        _clear_bio(ios->per_dev[i].bio);
+                        EXOFS_DBGMSG("start read offset passed end of file "
+                                "offset=0x%llx, length=0x%llx\n",
+                                _LLU(ios->per_dev[i].offset),
+                                _LLU(ios->per_dev[i].length));
+
+                        continue; /* we recovered */
                 }
 
                 if (osi.osd_err_pri >= acumulated_osd_err) {
@@ -205,14 +259,259 @@ int exofs_check_io(struct exofs_io_state *ios, u64 *resid)
         return acumulated_lin_err;
 }
 
+/*
+ * L - logical offset into the file
+ *
+ * U - The number of bytes in a stripe within a group
+ *
+ *      U = stripe_unit * group_width
+ *
+ * T - The number of bytes striped within a group of component objects
+ *     (before advancing to the next group)
+ *
+ *      T = stripe_unit * group_width * group_depth
+ *
+ * S - The number of bytes striped across all component objects
+ *     before the pattern repeats
+ *
+ *      S = stripe_unit * group_width * group_depth * group_count
+ *
+ * M - The "major" (i.e., across all components) stripe number
+ *
+ *      M = L / S
+ *
+ * G - Counts the groups from the beginning of the major stripe
+ *
+ *      G = (L - (M * S)) / T   [or (L % S) / T]
+ *
+ * H - The byte offset within the group
+ *
+ *      H = (L - (M * S)) % T   [or (L % S) % T]
+ *
+ * N - The "minor" (i.e., across the group) stripe number
+ *
+ *      N = H / U
+ *
+ * C - The component index coresponding to L
+ *
+ *      C = (H - (N * U)) / stripe_unit + G * group_width
+ *      [or (L % U) / stripe_unit + G * group_width]
+ *
+ * O - The component offset coresponding to L
+ *
+ *      O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit
+ */
+struct _striping_info {
+        u64 obj_offset;
+        u64 group_length;
+        u64 total_group_length;
+        u64 Major;
+        unsigned dev;
+        unsigned unit_off;
+};
+
+static void _calc_stripe_info(struct exofs_io_state *ios, u64 file_offset,
+                              struct _striping_info *si)
+{
+        u32     stripe_unit = ios->layout->stripe_unit;
+        u32     group_width = ios->layout->group_width;
+        u64     group_depth = ios->layout->group_depth;
+
+        u32     U = stripe_unit * group_width;
+        u64     T = U * group_depth;
+        u64     S = T * ios->layout->group_count;
+        u64     M = div64_u64(file_offset, S);
+
+        /*
+        G = (L - (M * S)) / T
+        H = (L - (M * S)) % T
+        */
+        u64     LmodS = file_offset - M * S;
+        u32     G = div64_u64(LmodS, T);
+        u64     H = LmodS - G * T;
+
+        u32     N = div_u64(H, U);
+
+        /* "H - (N * U)" is just "H % U" so it's bound to u32 */
+        si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width;
+        si->dev *= ios->layout->mirrors_p1;
+
+        div_u64_rem(file_offset, stripe_unit, &si->unit_off);
+
+        si->obj_offset = si->unit_off + (N * stripe_unit) +
+                                  (M * group_depth * stripe_unit);
+
+        si->group_length = T - H;
+        si->total_group_length = T;
+        si->Major = M;
+}
+
+static int _add_stripe_unit(struct exofs_io_state *ios,  unsigned *cur_pg,
+                unsigned pgbase, struct exofs_per_dev_state *per_dev,
+                int cur_len)
+{
+        unsigned pg = *cur_pg;
+        struct request_queue *q =
+                        osd_request_queue(exofs_ios_od(ios, per_dev->dev));
+
+        per_dev->length += cur_len;
+
+        if (per_dev->bio == NULL) {
+                unsigned pages_in_stripe = ios->layout->group_width *
+                                        (ios->layout->stripe_unit / PAGE_SIZE);
+                unsigned bio_size = (ios->nr_pages + pages_in_stripe) /
+                                                ios->layout->group_width;
+
+                per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size);
+                if (unlikely(!per_dev->bio)) {
+                        EXOFS_DBGMSG("Faild to allocate BIO size=%u\n",
+                                     bio_size);
+                        return -ENOMEM;
+                }
+        }
+
+        while (cur_len > 0) {
+                unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len);
+                unsigned added_len;
+
+                BUG_ON(ios->nr_pages <= pg);
+                cur_len -= pglen;
+
+                added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg],
+                                            pglen, pgbase);
+                if (unlikely(pglen != added_len))
+                        return -ENOMEM;
+                pgbase = 0;
+                ++pg;
+        }
+        BUG_ON(cur_len);
+
+        *cur_pg = pg;
+        return 0;
+}
+
+static int _prepare_one_group(struct exofs_io_state *ios, u64 length,
+                              struct _striping_info *si, unsigned first_comp)
+{
+        unsigned stripe_unit = ios->layout->stripe_unit;
+        unsigned mirrors_p1 = ios->layout->mirrors_p1;
+        unsigned devs_in_group = ios->layout->group_width * mirrors_p1;
+        unsigned dev = si->dev;
+        unsigned first_dev = dev - (dev % devs_in_group);
+        unsigned comp = first_comp + (dev - first_dev);
+        unsigned max_comp = ios->numdevs ? ios->numdevs - mirrors_p1 : 0;
+        unsigned cur_pg = ios->pages_consumed;
+        int ret = 0;
+
+        while (length) {
+                struct exofs_per_dev_state *per_dev = &ios->per_dev[comp];
+                unsigned cur_len, page_off = 0;
+
+                if (!per_dev->length) {
+                        per_dev->dev = dev;
+                        if (dev < si->dev) {
+                                per_dev->offset = si->obj_offset + stripe_unit -
+                                                                   si->unit_off;
+                                cur_len = stripe_unit;
+                        } else if (dev == si->dev) {
+                                per_dev->offset = si->obj_offset;
+                                cur_len = stripe_unit - si->unit_off;
+                                page_off = si->unit_off & ~PAGE_MASK;
+                                BUG_ON(page_off && (page_off != ios->pgbase));
+                        } else { /* dev > si->dev */
+                                per_dev->offset = si->obj_offset - si->unit_off;
+                                cur_len = stripe_unit;
+                        }
+
+                        if (max_comp < comp)
+                                max_comp = comp;
+
+                        dev += mirrors_p1;
+                        dev = (dev % devs_in_group) + first_dev;
+                } else {
+                        cur_len = stripe_unit;
+                }
+                if (cur_len >= length)
+                        cur_len = length;
+
+                ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev,
+                                       cur_len);
+                if (unlikely(ret))
+                        goto out;
+
+                comp += mirrors_p1;
+                comp = (comp % devs_in_group) + first_comp;
+
+                length -= cur_len;
+        }
+out:
+        ios->numdevs = max_comp + mirrors_p1;
+        ios->pages_consumed = cur_pg;
+        return ret;
+}
+
+static int _prepare_for_striping(struct exofs_io_state *ios)
+{
+        u64 length = ios->length;
+        struct _striping_info si;
+        unsigned devs_in_group = ios->layout->group_width *
+                                 ios->layout->mirrors_p1;
+        unsigned first_comp = 0;
+        int ret = 0;
+
+        _calc_stripe_info(ios, ios->offset, &si);
+
+        if (!ios->pages) {
+                if (ios->kern_buff) {
+                        struct exofs_per_dev_state *per_dev = &ios->per_dev[0];
+
+                        per_dev->offset = si.obj_offset;
+                        per_dev->dev = si.dev;
+
+                        /* no cross device without page array */
+                        BUG_ON((ios->layout->group_width > 1) &&
+                               (si.unit_off + ios->length >
+                                ios->layout->stripe_unit));
+                }
+                ios->numdevs = ios->layout->mirrors_p1;
+                return 0;
+        }
+
+        while (length) {
+                if (length < si.group_length)
+                        si.group_length = length;
+
+                ret = _prepare_one_group(ios, si.group_length, &si, first_comp);
+                if (unlikely(ret))
+                        goto out;
+
+                length -= si.group_length;
+
+                si.group_length = si.total_group_length;
+                si.unit_off = 0;
+                ++si.Major;
+                si.obj_offset = si.Major * ios->layout->stripe_unit *
+                                                ios->layout->group_depth;
+
+                si.dev = (si.dev - (si.dev % devs_in_group)) + devs_in_group;
+                si.dev %= ios->layout->s_numdevs;
+
+                first_comp += devs_in_group;
+                first_comp %= ios->layout->s_numdevs;
+        }
+
+out:
+        return ret;
+}
+
 int exofs_sbi_create(struct exofs_io_state *ios)
 {
         int i, ret;
 
-        for (i = 0; i < ios->sbi->s_numdevs; i++) {
+        for (i = 0; i < ios->layout->s_numdevs; i++) {
                 struct osd_request *or;
 
-                or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL);
+                or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL);
                 if (unlikely(!or)) {
                         EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                         ret = -ENOMEM;
@@ -233,10 +532,10 @@ int exofs_sbi_remove(struct exofs_io_state *ios)
 {
         int i, ret;
 
-        for (i = 0; i < ios->sbi->s_numdevs; i++) {
+        for (i = 0; i < ios->layout->s_numdevs; i++) {
                 struct osd_request *or;
 
-                or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL);
+                or = osd_start_request(exofs_ios_od(ios, i), GFP_KERNEL);
                 if (unlikely(!or)) {
                         EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                         ret = -ENOMEM;
@@ -253,51 +552,74 @@ out:
         return ret;
 }
 
-int exofs_sbi_write(struct exofs_io_state *ios)
+static int _sbi_write_mirror(struct exofs_io_state *ios, int cur_comp)
 {
-        int i, ret;
+        struct exofs_per_dev_state *master_dev = &ios->per_dev[cur_comp];
+        unsigned dev = ios->per_dev[cur_comp].dev;
+        unsigned last_comp = cur_comp + ios->layout->mirrors_p1;
+        int ret = 0;
 
-        for (i = 0; i < ios->sbi->s_numdevs; i++) {
+        if (ios->pages && !master_dev->length)
+                return 0; /* Just an empty slot */
+
+        for (; cur_comp < last_comp; ++cur_comp, ++dev) {
+                struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp];
                 struct osd_request *or;
 
-                or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL);
+                or = osd_start_request(exofs_ios_od(ios, dev), GFP_KERNEL);
                 if (unlikely(!or)) {
                         EXOFS_ERR("%s: osd_start_request failed\n", __func__);
                         ret = -ENOMEM;
                         goto out;
                 }
-                ios->per_dev[i].or = or;
-                ios->numdevs++;
+                per_dev->or = or;
+                per_dev->offset = master_dev->offset;
 
-                if (ios->bio) {
+                if (ios->pages) {
                         struct bio *bio;
 
-                        if (i != 0) {
+                        if (per_dev != master_dev) {
                                 bio = bio_kmalloc(GFP_KERNEL,
-                                                  ios->bio->bi_max_vecs);
+                                                  master_dev->bio->bi_max_vecs);
                                 if (unlikely(!bio)) {
+                                        EXOFS_DBGMSG(
+                                              "Faild to allocate BIO size=%u\n",
+                                              master_dev->bio->bi_max_vecs);
                                         ret = -ENOMEM;
                                         goto out;
                                 }
 
-                                __bio_clone(bio, ios->bio);
+                                __bio_clone(bio, master_dev->bio);
                                 bio->bi_bdev = NULL;
                                 bio->bi_next = NULL;
-                                ios->per_dev[i].bio =  bio;
+                                per_dev->length = master_dev->length;
+                                per_dev->bio =  bio;
+                                per_dev->dev = dev;
                         } else {
-                                bio = ios->bio;
+                                bio = master_dev->bio;
+                                /* FIXME: bio_set_dir() */
+                                bio->bi_rw |= (1 << BIO_RW);
                         }
 
-                        osd_req_write(or, &ios->obj, ios->offset, bio,
-                                      ios->length);
-/*                      EXOFS_DBGMSG("write sync=%d\n", sync);*/
+                        osd_req_write(or, &ios->obj, per_dev->offset, bio,
+                                      per_dev->length);
+                        EXOFS_DBGMSG("write(0x%llx) offset=0x%llx "
+                                      "length=0x%llx dev=%d\n",
+                                     _LLU(ios->obj.id), _LLU(per_dev->offset),
+                                     _LLU(per_dev->length), dev);
                 } else if (ios->kern_buff) {
-                        osd_req_write_kern(or, &ios->obj, ios->offset,
+                        ret = osd_req_write_kern(or, &ios->obj, per_dev->offset,
                                            ios->kern_buff, ios->length);
-/*                      EXOFS_DBGMSG("write_kern sync=%d\n", sync);*/
+                        if (unlikely(ret))
+                                goto out;
+                        EXOFS_DBGMSG2("write_kern(0x%llx) offset=0x%llx "
+                                      "length=0x%llx dev=%d\n",
+                                     _LLU(ios->obj.id), _LLU(per_dev->offset),
+                                     _LLU(ios->length), dev);
                 } else {
                         osd_req_set_attributes(or, &ios->obj);
-/*                      EXOFS_DBGMSG("set_attributes sync=%d\n", sync);*/
+                        EXOFS_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
+                                     _LLU(ios->obj.id), ios->out_attr_len, dev);
                 }
 
                 if (ios->out_attr)
@@ -308,54 +630,93 @@ int exofs_sbi_write(struct exofs_io_state *ios)
                         osd_req_add_get_attr_list(or, ios->in_attr,
                                                   ios->in_attr_len);
         }
-        ret = exofs_io_execute(ios);
 
 out:
         return ret;
 }
 
-int exofs_sbi_read(struct exofs_io_state *ios)
+int exofs_sbi_write(struct exofs_io_state *ios)
 {
-        int i, ret;
+        int i;
+        int ret;
 
-        for (i = 0; i < 1; i++) {
-                struct osd_request *or;
-                unsigned first_dev = (unsigned)ios->obj.id;
+        ret = _prepare_for_striping(ios);
+        if (unlikely(ret))
+                return ret;
 
-                first_dev %= ios->sbi->s_numdevs;
-                or = osd_start_request(ios->sbi->s_ods[first_dev], GFP_KERNEL);
-                if (unlikely(!or)) {
-                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
-                        ret = -ENOMEM;
-                        goto out;
-                }
-                ios->per_dev[i].or = or;
-                ios->numdevs++;
+        for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
+                ret = _sbi_write_mirror(ios, i);
+                if (unlikely(ret))
+                        return ret;
+        }
 
-                if (ios->bio) {
-                        osd_req_read(or, &ios->obj, ios->offset, ios->bio,
-                                     ios->length);
-/*                      EXOFS_DBGMSG("read sync=%d\n", sync);*/
-                } else if (ios->kern_buff) {
-                        osd_req_read_kern(or, &ios->obj, ios->offset,
-                                           ios->kern_buff, ios->length);
-/*                      EXOFS_DBGMSG("read_kern sync=%d\n", sync);*/
-                } else {
-                        osd_req_get_attributes(or, &ios->obj);
-/*                      EXOFS_DBGMSG("get_attributes sync=%d\n", sync);*/
-                }
+        ret = exofs_io_execute(ios);
+        return ret;
+}
 
-                if (ios->out_attr)
-                        osd_req_add_set_attr_list(or, ios->out_attr,
-                                                  ios->out_attr_len);
+static int _sbi_read_mirror(struct exofs_io_state *ios, unsigned cur_comp)
+{
+        struct osd_request *or;
+        struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp];
+        unsigned first_dev = (unsigned)ios->obj.id;
 
-                if (ios->in_attr)
-                        osd_req_add_get_attr_list(or, ios->in_attr,
-                                                  ios->in_attr_len);
+        if (ios->pages && !per_dev->length)
+                return 0; /* Just an empty slot */
+
+        first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1;
+        or = osd_start_request(exofs_ios_od(ios, first_dev), GFP_KERNEL);
+        if (unlikely(!or)) {
+                EXOFS_ERR("%s: osd_start_request failed\n", __func__);
+                return -ENOMEM;
         }
-        ret = exofs_io_execute(ios);
+        per_dev->or = or;
+
+        if (ios->pages) {
+                osd_req_read(or, &ios->obj, per_dev->offset,
+                                per_dev->bio, per_dev->length);
+                EXOFS_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx"
+                             " dev=%d\n", _LLU(ios->obj.id),
+                             _LLU(per_dev->offset), _LLU(per_dev->length),
+                             first_dev);
+        } else if (ios->kern_buff) {
+                int ret = osd_req_read_kern(or, &ios->obj, per_dev->offset,
+                                            ios->kern_buff, ios->length);
+                EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx "
+                              "length=0x%llx dev=%d ret=>%d\n",
+                              _LLU(ios->obj.id), _LLU(per_dev->offset),
+                              _LLU(ios->length), first_dev, ret);
+                if (unlikely(ret))
+                        return ret;
+        } else {
+                osd_req_get_attributes(or, &ios->obj);
+                EXOFS_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n",
+                              _LLU(ios->obj.id), ios->in_attr_len, first_dev);
+        }
+        if (ios->out_attr)
+                osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len);
 
-out:
+        if (ios->in_attr)
+                osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len);
+
+        return 0;
+}
+
+int exofs_sbi_read(struct exofs_io_state *ios)
+{
+        int i;
+        int ret;
+
+        ret = _prepare_for_striping(ios);
+        if (unlikely(ret))
+                return ret;
+
+        for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
+                ret = _sbi_read_mirror(ios, i);
+                if (unlikely(ret))
+                        return ret;
+        }
+
+        ret = exofs_io_execute(ios);
         return ret;
 }
 
@@ -380,42 +741,82 @@ int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr)
         return -EIO;
 }
 
+static int _truncate_mirrors(struct exofs_io_state *ios, unsigned cur_comp,
+                             struct osd_attr *attr)
+{
+        int last_comp = cur_comp + ios->layout->mirrors_p1;
+
+        for (; cur_comp < last_comp; ++cur_comp) {
+                struct exofs_per_dev_state *per_dev = &ios->per_dev[cur_comp];
+                struct osd_request *or;
+
+                or = osd_start_request(exofs_ios_od(ios, cur_comp), GFP_KERNEL);
+                if (unlikely(!or)) {
+                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
+                        return -ENOMEM;
+                }
+                per_dev->or = or;
+
+                osd_req_set_attributes(or, &ios->obj);
+                osd_req_add_set_attr_list(or, attr, 1);
+        }
+
+        return 0;
+}
+
 int exofs_oi_truncate(struct exofs_i_info *oi, u64 size)
 {
         struct exofs_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info;
         struct exofs_io_state *ios;
-        struct osd_attr attr;
-        __be64 newsize;
+        struct exofs_trunc_attr {
+                struct osd_attr attr;
+                __be64 newsize;
+        } *size_attrs;
+        struct _striping_info si;
         int i, ret;
 
-        if (exofs_get_io_state(sbi, &ios))
-                return -ENOMEM;
+        ret = exofs_get_io_state(&sbi->layout, &ios);
+        if (unlikely(ret))
+                return ret;
+
+        size_attrs = kcalloc(ios->layout->group_width, sizeof(*size_attrs),
+                             GFP_KERNEL);
+        if (unlikely(!size_attrs)) {
+                ret = -ENOMEM;
+                goto out;
+        }
 
         ios->obj.id = exofs_oi_objno(oi);
         ios->cred = oi->i_cred;
 
-        newsize = cpu_to_be64(size);
-        attr = g_attr_logical_length;
-        attr.val_ptr = &newsize;
+        ios->numdevs = ios->layout->s_numdevs;
+        _calc_stripe_info(ios, size, &si);
 
-        for (i = 0; i < sbi->s_numdevs; i++) {
-                struct osd_request *or;
+        for (i = 0; i < ios->layout->group_width; ++i) {
+                struct exofs_trunc_attr *size_attr = &size_attrs[i];
+                u64 obj_size;
 
-                or = osd_start_request(sbi->s_ods[i], GFP_KERNEL);
-                if (unlikely(!or)) {
-                        EXOFS_ERR("%s: osd_start_request failed\n", __func__);
-                        ret = -ENOMEM;
-                        goto out;
-                }
-                ios->per_dev[i].or = or;
-                ios->numdevs++;
+                if (i < si.dev)
+                        obj_size = si.obj_offset +
+                                        ios->layout->stripe_unit - si.unit_off;
+                else if (i == si.dev)
+                        obj_size = si.obj_offset;
+                else /* i > si.dev */
+                        obj_size = si.obj_offset - si.unit_off;
 
-                osd_req_set_attributes(or, &ios->obj);
-                osd_req_add_set_attr_list(or, &attr, 1);
+                size_attr->newsize = cpu_to_be64(obj_size);
+                size_attr->attr = g_attr_logical_length;
+                size_attr->attr.val_ptr = &size_attr->newsize;
+
+                ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1,
+                                        &size_attr->attr);
+                if (unlikely(ret))
+                        goto out;
         }
         ret = exofs_io_execute(ios);
 
 out:
+        kfree(size_attrs);
         exofs_put_io_state(ios);
         return ret;
 }
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index a1d1e77b12eb..6cf5e4e84d61 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -210,7 +210,7 @@ int exofs_sync_fs(struct super_block *sb, int wait)
         sbi = sb->s_fs_info;
         fscb = &sbi->s_fscb;
 
-        ret = exofs_get_io_state(sbi, &ios);
+        ret = exofs_get_io_state(&sbi->layout, &ios);
         if (ret)
                 goto out;
 
@@ -264,12 +264,12 @@ static void _exofs_print_device(const char *msg, const char *dev_path,
 
 void exofs_free_sbi(struct exofs_sb_info *sbi)
 {
-        while (sbi->s_numdevs) {
-                int i = --sbi->s_numdevs;
-                struct osd_dev *od = sbi->s_ods[i];
+        while (sbi->layout.s_numdevs) {
+                int i = --sbi->layout.s_numdevs;
+                struct osd_dev *od = sbi->layout.s_ods[i];
 
                 if (od) {
-                        sbi->s_ods[i] = NULL;
+                        sbi->layout.s_ods[i] = NULL;
                         osduld_put_device(od);
                 }
         }
@@ -298,7 +298,8 @@ static void exofs_put_super(struct super_block *sb)
                                   msecs_to_jiffies(100));
         }
 
-        _exofs_print_device("Unmounting", NULL, sbi->s_ods[0], sbi->s_pid);
+        _exofs_print_device("Unmounting", NULL, sbi->layout.s_ods[0],
+                            sbi->layout.s_pid);
 
         exofs_free_sbi(sbi);
         sb->s_fs_info = NULL;
@@ -307,6 +308,8 @@ static void exofs_put_super(struct super_block *sb)
 static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
                                     struct exofs_device_table *dt)
 {
+        u64 stripe_length;
+
         sbi->data_map.odm_num_comps   =
                                 le32_to_cpu(dt->dt_data_map.cb_num_comps);
         sbi->data_map.odm_stripe_unit =
@@ -320,14 +323,63 @@ static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
         sbi->data_map.odm_raid_algorithm  =
                                 le32_to_cpu(dt->dt_data_map.cb_raid_algorithm);
 
-/* FIXME: Hard coded mirror only for now. if not so do not mount */
-        if ((sbi->data_map.odm_num_comps != numdevs) ||
-            (sbi->data_map.odm_stripe_unit != EXOFS_BLKSIZE) ||
-            (sbi->data_map.odm_raid_algorithm != PNFS_OSD_RAID_0) ||
-            (sbi->data_map.odm_mirror_cnt != (numdevs - 1)))
+/* FIXME: Only raid0 for now. if not so, do not mount */
+        if (sbi->data_map.odm_num_comps != numdevs) {
+                EXOFS_ERR("odm_num_comps(%u) != numdevs(%u)\n",
+                          sbi->data_map.odm_num_comps, numdevs);
                 return -EINVAL;
-        else
-                return 0;
+        }
+        if (sbi->data_map.odm_raid_algorithm != PNFS_OSD_RAID_0) {
+                EXOFS_ERR("Only RAID_0 for now\n");
+                return -EINVAL;
+        }
+        if (0 != (numdevs % (sbi->data_map.odm_mirror_cnt + 1))) {
+                EXOFS_ERR("Data Map wrong, numdevs=%d mirrors=%d\n",
+                          numdevs, sbi->data_map.odm_mirror_cnt);
+                return -EINVAL;
+        }
+
+        if (0 != (sbi->data_map.odm_stripe_unit & ~PAGE_MASK)) {
+                EXOFS_ERR("Stripe Unit(0x%llx)"
+                          " must be Multples of PAGE_SIZE(0x%lx)\n",
+                          _LLU(sbi->data_map.odm_stripe_unit), PAGE_SIZE);
+                return -EINVAL;
+        }
+
+        sbi->layout.stripe_unit = sbi->data_map.odm_stripe_unit;
+        sbi->layout.mirrors_p1 = sbi->data_map.odm_mirror_cnt + 1;
+
+        if (sbi->data_map.odm_group_width) {
+                sbi->layout.group_width = sbi->data_map.odm_group_width;
+                sbi->layout.group_depth = sbi->data_map.odm_group_depth;
+                if (!sbi->layout.group_depth) {
+                        EXOFS_ERR("group_depth == 0 && group_width != 0\n");
+                        return -EINVAL;
+                }
+                sbi->layout.group_count = sbi->data_map.odm_num_comps /
+                                                sbi->layout.mirrors_p1 /
+                                                sbi->data_map.odm_group_width;
+        } else {
+                if (sbi->data_map.odm_group_depth) {
+                        printk(KERN_NOTICE "Warning: group_depth ignored "
+                                "group_width == 0 && group_depth == %d\n",
+                                sbi->data_map.odm_group_depth);
+                        sbi->data_map.odm_group_depth = 0;
+                }
+                sbi->layout.group_width = sbi->data_map.odm_num_comps /
+                                                        sbi->layout.mirrors_p1;
+                sbi->layout.group_depth = -1;
+                sbi->layout.group_count = 1;
+        }
+
+        stripe_length = (u64)sbi->layout.group_width * sbi->layout.stripe_unit;
+        if (stripe_length >= (1ULL << 32)) {
+                EXOFS_ERR("Total Stripe length(0x%llx)"
+                          " >= 32bit is not supported\n", _LLU(stripe_length));
+                return -EINVAL;
+        }
+
+        return 0;
 }
 
 /* @odi is valid only as long as @fscb_dev is valid */
@@ -361,7 +413,7 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi,
 {
         struct exofs_sb_info *sbi = *psbi;
         struct osd_dev *fscb_od;
-        struct osd_obj_id obj = {.partition = sbi->s_pid,
+        struct osd_obj_id obj = {.partition = sbi->layout.s_pid,
                                  .id = EXOFS_DEVTABLE_ID};
         struct exofs_device_table *dt;
         unsigned table_bytes = table_count * sizeof(dt->dt_dev_table[0]) +
@@ -376,9 +428,9 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi,
                 return -ENOMEM;
         }
 
-        fscb_od = sbi->s_ods[0];
-        sbi->s_ods[0] = NULL;
-        sbi->s_numdevs = 0;
+        fscb_od = sbi->layout.s_ods[0];
+        sbi->layout.s_ods[0] = NULL;
+        sbi->layout.s_numdevs = 0;
         ret = exofs_read_kern(fscb_od, sbi->s_cred, &obj, 0, dt, table_bytes);
         if (unlikely(ret)) {
                 EXOFS_ERR("ERROR: reading device table\n");
@@ -397,14 +449,15 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi,
                 goto out;
 
         if (likely(numdevs > 1)) {
-                unsigned size = numdevs * sizeof(sbi->s_ods[0]);
+                unsigned size = numdevs * sizeof(sbi->layout.s_ods[0]);
 
                 sbi = krealloc(sbi, sizeof(*sbi) + size, GFP_KERNEL);
                 if (unlikely(!sbi)) {
                         ret = -ENOMEM;
                         goto out;
                 }
-                memset(&sbi->s_ods[1], 0, size - sizeof(sbi->s_ods[0]));
+                memset(&sbi->layout.s_ods[1], 0,
+                       size - sizeof(sbi->layout.s_ods[0]));
                 *psbi = sbi;
         }
 
@@ -427,8 +480,8 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi,
                  * line. We always keep them in device-table order.
                  */
                 if (fscb_od && osduld_device_same(fscb_od, &odi)) {
-                        sbi->s_ods[i] = fscb_od;
-                        ++sbi->s_numdevs;
+                        sbi->layout.s_ods[i] = fscb_od;
+                        ++sbi->layout.s_numdevs;
                         fscb_od = NULL;
                         continue;
                 }
@@ -441,8 +494,8 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi,
                         goto out;
                 }
 
-                sbi->s_ods[i] = od;
-                ++sbi->s_numdevs;
+                sbi->layout.s_ods[i] = od;
+                ++sbi->layout.s_numdevs;
 
                 /* Read the fscb of the other devices to make sure the FS
                  * partition is there.
@@ -499,9 +552,15 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
                 goto free_sbi;
         }
 
-        sbi->s_ods[0] = od;
-        sbi->s_numdevs = 1;
-        sbi->s_pid = opts->pid;
+        /* Default layout in case we do not have a device-table */
+        sbi->layout.stripe_unit = PAGE_SIZE;
+        sbi->layout.mirrors_p1 = 1;
+        sbi->layout.group_width = 1;
+        sbi->layout.group_depth = -1;
+        sbi->layout.group_count = 1;
+        sbi->layout.s_ods[0] = od;
+        sbi->layout.s_numdevs = 1;
+        sbi->layout.s_pid = opts->pid;
         sbi->s_timeout = opts->timeout;
 
         /* fill in some other data by hand */
@@ -514,7 +573,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
         sb->s_bdev = NULL;
         sb->s_dev = 0;
 
-        obj.partition = sbi->s_pid;
+        obj.partition = sbi->layout.s_pid;
         obj.id = EXOFS_SUPER_ID;
         exofs_make_credential(sbi->s_cred, &obj);
 
@@ -578,13 +637,13 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
                 goto free_sbi;
         }
 
-        _exofs_print_device("Mounting", opts->dev_name, sbi->s_ods[0],
-                            sbi->s_pid);
+        _exofs_print_device("Mounting", opts->dev_name, sbi->layout.s_ods[0],
+                            sbi->layout.s_pid);
         return 0;
 
 free_sbi:
         EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n",
-                  opts->dev_name, sbi->s_pid, ret);
+                  opts->dev_name, sbi->layout.s_pid, ret);
         exofs_free_sbi(sbi);
         return ret;
 }
@@ -627,7 +686,7 @@ static int exofs_statfs(struct dentry *dentry, struct kstatfs *buf)
         uint8_t cred_a[OSD_CAP_LEN];
         int ret;
 
-        ret = exofs_get_io_state(sbi, &ios);
+        ret = exofs_get_io_state(&sbi->layout, &ios);
         if (ret) {
                 EXOFS_DBGMSG("exofs_get_io_state failed.\n");
                 return ret;
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9b179163f1de..6e5787a29b90 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1014,7 +1014,7 @@ struct ext4_sb_info {
         atomic_t s_lock_busy;
 
         /* locality groups */
-        struct ext4_locality_group *s_locality_groups;
+        struct ext4_locality_group __percpu *s_locality_groups;
 
         /* for write statistics */
         unsigned long s_sectors_written_start;
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index f6071ce0b155..503a48927402 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -116,11 +116,9 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
                  * devices or filesystem images.
                  */
                 memset(buf, 0, sizeof(buf));
-                path.mnt = mnt->mnt_parent;
-                path.dentry = mnt->mnt_mountpoint;
-                path_get(&path);
+                path.mnt = mnt;
+                path.dentry = mnt->mnt_root;
                 cp = d_path(&path, buf, sizeof(buf));
-                path_put(&path);
                 if (!IS_ERR(cp)) {
                         memcpy(sbi->s_es->s_last_mounted, cp,
                                sizeof(sbi->s_es->s_last_mounted));
diff --git a/fs/file.c b/fs/file.c
index 87e129030ab1..38039af67663 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -478,7 +478,7 @@ repeat:
         error = fd;
 #if 1
         /* Sanity check */
-        if (rcu_dereference(fdt->fd[fd]) != NULL) {
+        if (rcu_dereference_raw(fdt->fd[fd]) != NULL) {
                 printk(KERN_WARNING "alloc_fd: slot %d not NULL!\n", fd);
                 rcu_assign_pointer(fdt->fd[fd], NULL);
         }
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 51d9e33d634f..eb7e9423691f 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -865,13 +865,10 @@ static int fuse_notify_inval_inode(struct fuse_conn *fc, unsigned int size,
 
         down_read(&fc->killsb);
         err = -ENOENT;
-        if (!fc->sb)
-                goto err_unlock;
-
-        err = fuse_reverse_inval_inode(fc->sb, outarg.ino,
-                                       outarg.off, outarg.len);
-
-err_unlock:
+        if (fc->sb) {
+                err = fuse_reverse_inval_inode(fc->sb, outarg.ino,
+                                               outarg.off, outarg.len);
+        }
         up_read(&fc->killsb);
         return err;
 
@@ -884,10 +881,15 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,
                                    struct fuse_copy_state *cs)
 {
         struct fuse_notify_inval_entry_out outarg;
-        int err = -EINVAL;
-        char buf[FUSE_NAME_MAX+1];
+        int err = -ENOMEM;
+        char *buf;
         struct qstr name;
 
+        buf = kzalloc(FUSE_NAME_MAX + 1, GFP_KERNEL);
+        if (!buf)
+                goto err;
+
+        err = -EINVAL;
         if (size < sizeof(outarg))
                 goto err;
 
@@ -910,16 +912,14 @@ static int fuse_notify_inval_entry(struct fuse_conn *fc, unsigned int size,
 
         down_read(&fc->killsb);
         err = -ENOENT;
-        if (!fc->sb)
-                goto err_unlock;
-
-        err = fuse_reverse_inval_entry(fc->sb, outarg.parent, &name);
-
-err_unlock:
+        if (fc->sb)
+                err = fuse_reverse_inval_entry(fc->sb, outarg.parent, &name);
         up_read(&fc->killsb);
+        kfree(buf);
         return err;
 
 err:
+        kfree(buf);
         fuse_copy_finish(cs);
         return err;
 }
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 7b8da9415267..0c1d0b82dcf1 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1061,8 +1061,8 @@ out:
 
 int gfs2_releasepage(struct page *page, gfp_t gfp_mask)
 {
-        struct inode *aspace = page->mapping->host;
-        struct gfs2_sbd *sdp = aspace->i_sb->s_fs_info;
+        struct address_space *mapping = page->mapping;
+        struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping);
         struct buffer_head *bh, *head;
         struct gfs2_bufdata *bd;
 
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index f42663325931..454d4b4eb36b 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -19,7 +19,6 @@
 #include <linux/list.h>
 #include <linux/wait.h>
 #include <linux/module.h>
-#include <linux/rwsem.h>
 #include <asm/uaccess.h>
 #include <linux/seq_file.h>
 #include <linux/debugfs.h>
@@ -60,7 +59,6 @@ static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl);
 #define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { __dump_glock(NULL, gl); BUG(); } } while(0)
 static void do_xmote(struct gfs2_glock *gl, struct gfs2_holder *gh, unsigned int target);
 
-static DECLARE_RWSEM(gfs2_umount_flush_sem);
 static struct dentry *gfs2_root;
 static struct workqueue_struct *glock_workqueue;
 struct workqueue_struct *gfs2_delete_workqueue;
@@ -154,12 +152,14 @@ static unsigned int gl_hash(const struct gfs2_sbd *sdp,
 static void glock_free(struct gfs2_glock *gl)
 {
         struct gfs2_sbd *sdp = gl->gl_sbd;
-        struct inode *aspace = gl->gl_aspace;
+        struct address_space *mapping = gfs2_glock2aspace(gl);
+        struct kmem_cache *cachep = gfs2_glock_cachep;
 
-        if (aspace)
-                gfs2_aspace_put(aspace);
+        GLOCK_BUG_ON(gl, mapping && mapping->nrpages);
         trace_gfs2_glock_put(gl);
-        sdp->sd_lockstruct.ls_ops->lm_put_lock(gfs2_glock_cachep, gl);
+        if (mapping)
+                cachep = gfs2_glock_aspace_cachep;
+        sdp->sd_lockstruct.ls_ops->lm_put_lock(cachep, gl);
 }
 
 /**
@@ -712,7 +712,6 @@ static void glock_work_func(struct work_struct *work)
                 finish_xmote(gl, gl->gl_reply);
                 drop_ref = 1;
         }
-        down_read(&gfs2_umount_flush_sem);
         spin_lock(&gl->gl_spin);
         if (test_and_clear_bit(GLF_PENDING_DEMOTE, &gl->gl_flags) &&
             gl->gl_state != LM_ST_UNLOCKED &&
@@ -725,7 +724,6 @@ static void glock_work_func(struct work_struct *work)
         }
         run_queue(gl, 0);
         spin_unlock(&gl->gl_spin);
-        up_read(&gfs2_umount_flush_sem);
         if (!delay ||
             queue_delayed_work(glock_workqueue, &gl->gl_work, delay) == 0)
                 gfs2_glock_put(gl);
@@ -750,10 +748,11 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
                    const struct gfs2_glock_operations *glops, int create,
                    struct gfs2_glock **glp)
 {
+        struct super_block *s = sdp->sd_vfs;
         struct lm_lockname name = { .ln_number = number, .ln_type = glops->go_type };
         struct gfs2_glock *gl, *tmp;
         unsigned int hash = gl_hash(sdp, &name);
-        int error;
+        struct address_space *mapping;
 
         read_lock(gl_lock_addr(hash));
         gl = search_bucket(hash, sdp, &name);
@@ -765,7 +764,10 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
         if (!create)
                 return -ENOENT;
 
-        gl = kmem_cache_alloc(gfs2_glock_cachep, GFP_KERNEL);
+        if (glops->go_flags & GLOF_ASPACE)
+                gl = kmem_cache_alloc(gfs2_glock_aspace_cachep, GFP_KERNEL);
+        else
+                gl = kmem_cache_alloc(gfs2_glock_cachep, GFP_KERNEL);
         if (!gl)
                 return -ENOMEM;
 
@@ -784,18 +786,18 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
         gl->gl_tchange = jiffies;
         gl->gl_object = NULL;
         gl->gl_sbd = sdp;
-        gl->gl_aspace = NULL;
         INIT_DELAYED_WORK(&gl->gl_work, glock_work_func);
         INIT_WORK(&gl->gl_delete, delete_work_func);
 
-        /* If this glock protects actual on-disk data or metadata blocks,
-           create a VFS inode to manage the pages/buffers holding them. */
-        if (glops == &gfs2_inode_glops || glops == &gfs2_rgrp_glops) {
-                gl->gl_aspace = gfs2_aspace_get(sdp);
-                if (!gl->gl_aspace) {
-                        error = -ENOMEM;
-                        goto fail;
-                }
+        mapping = gfs2_glock2aspace(gl);
+        if (mapping) {
+                mapping->a_ops = &gfs2_meta_aops;
+                mapping->host = s->s_bdev->bd_inode;
+                mapping->flags = 0;
+                mapping_set_gfp_mask(mapping, GFP_NOFS);
+                mapping->assoc_mapping = NULL;
+                mapping->backing_dev_info = s->s_bdi;
+                mapping->writeback_index = 0;
         }
 
         write_lock(gl_lock_addr(hash));
@@ -812,10 +814,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
         *glp = gl;
 
         return 0;
-
-fail:
-        kmem_cache_free(gfs2_glock_cachep, gl);
-        return error;
 }
 
 /**
@@ -1510,35 +1508,10 @@ void gfs2_glock_thaw(struct gfs2_sbd *sdp)
 
 void gfs2_gl_hash_clear(struct gfs2_sbd *sdp)
 {
-        unsigned long t;
         unsigned int x;
-        int cont;
 
-        t = jiffies;
-
-        for (;;) {
-                cont = 0;
-                for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
-                        if (examine_bucket(clear_glock, sdp, x))
-                                cont = 1;
-                }
-
-                if (!cont)
-                        break;
-
-                if (time_after_eq(jiffies,
-                                  t + gfs2_tune_get(sdp, gt_stall_secs) * HZ)) {
-                        fs_warn(sdp, "Unmount seems to be stalled. "
-                                     "Dumping lock state...\n");
-                        gfs2_dump_lockstate(sdp);
-                        t = jiffies;
-                }
-
-                down_write(&gfs2_umount_flush_sem);
-                invalidate_inodes(sdp->sd_vfs);
-                up_write(&gfs2_umount_flush_sem);
-                msleep(10);
-        }
+        for (x = 0; x < GFS2_GL_HASH_SIZE; x++)
+                examine_bucket(clear_glock, sdp, x);
         flush_workqueue(glock_workqueue);
         wait_event(sdp->sd_glock_wait, atomic_read(&sdp->sd_glock_disposal) == 0);
         gfs2_dump_lockstate(sdp);
@@ -1685,7 +1658,7 @@ static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl)
         dtime *= 1000000/HZ; /* demote time in uSec */
         if (!test_bit(GLF_DEMOTE, &gl->gl_flags))
                 dtime = 0;
-        gfs2_print_dbg(seq, "G:  s:%s n:%u/%llu f:%s t:%s d:%s/%llu a:%d r:%d\n",
+        gfs2_print_dbg(seq, "G:  s:%s n:%u/%llx f:%s t:%s d:%s/%llu a:%d r:%d\n",
                   state2str(gl->gl_state),
                   gl->gl_name.ln_type,
                   (unsigned long long)gl->gl_name.ln_number,
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index c0262faf4725..2bda1911b156 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -180,6 +180,13 @@ static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl)
         return gl->gl_state == LM_ST_SHARED;
 }
 
+static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl)
+{
+        if (gl->gl_ops->go_flags & GLOF_ASPACE)
+                return (struct address_space *)(gl + 1);
+        return NULL;
+}
+
 int gfs2_glock_get(struct gfs2_sbd *sdp,
                    u64 number, const struct gfs2_glock_operations *glops,
                    int create, struct gfs2_glock **glp);
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 78554acc0605..38e3749d476c 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -87,7 +87,7 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
 
 static void rgrp_go_sync(struct gfs2_glock *gl)
 {
-        struct address_space *metamapping = gl->gl_aspace->i_mapping;
+        struct address_space *metamapping = gfs2_glock2aspace(gl);
         int error;
 
         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
@@ -113,7 +113,7 @@ static void rgrp_go_sync(struct gfs2_glock *gl)
 
 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 {
-        struct address_space *mapping = gl->gl_aspace->i_mapping;
+        struct address_space *mapping = gfs2_glock2aspace(gl);
 
         BUG_ON(!(flags & DIO_METADATA));
         gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
@@ -134,7 +134,7 @@ static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 static void inode_go_sync(struct gfs2_glock *gl)
 {
         struct gfs2_inode *ip = gl->gl_object;
-        struct address_space *metamapping = gl->gl_aspace->i_mapping;
+        struct address_space *metamapping = gfs2_glock2aspace(gl);
         int error;
 
         if (ip && !S_ISREG(ip->i_inode.i_mode))
@@ -183,7 +183,7 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
         gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
 
         if (flags & DIO_METADATA) {
-                struct address_space *mapping = gl->gl_aspace->i_mapping;
+                struct address_space *mapping = gfs2_glock2aspace(gl);
                 truncate_inode_pages(mapping, 0);
                 if (ip) {
                         set_bit(GIF_INVALID, &ip->i_flags);
@@ -282,7 +282,8 @@ static int inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 
 static int rgrp_go_demote_ok(const struct gfs2_glock *gl)
 {
-        return !gl->gl_aspace->i_mapping->nrpages;
+        const struct address_space *mapping = (const struct address_space *)(gl + 1);
+        return !mapping->nrpages;
 }
 
 /**
@@ -387,8 +388,7 @@ static void iopen_go_callback(struct gfs2_glock *gl)
         struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
 
         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
-            gl->gl_state == LM_ST_SHARED &&
-            ip && test_bit(GIF_USER, &ip->i_flags)) {
+            gl->gl_state == LM_ST_SHARED && ip) {
                 gfs2_glock_hold(gl);
                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
                         gfs2_glock_put_nolock(gl);
@@ -407,6 +407,7 @@ const struct gfs2_glock_operations gfs2_inode_glops = {
         .go_dump = inode_go_dump,
         .go_type = LM_TYPE_INODE,
         .go_min_hold_time = HZ / 5,
+        .go_flags = GLOF_ASPACE,
 };
 
 const struct gfs2_glock_operations gfs2_rgrp_glops = {
@@ -418,6 +419,7 @@ const struct gfs2_glock_operations gfs2_rgrp_glops = {
         .go_dump = gfs2_rgrp_dump,
         .go_type = LM_TYPE_RGRP,
         .go_min_hold_time = HZ / 5,
+        .go_flags = GLOF_ASPACE,
 };
 
 const struct gfs2_glock_operations gfs2_trans_glops = {
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index bc0ad158e6b4..b8025e51cabf 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -162,6 +162,8 @@ struct gfs2_glock_operations {
         void (*go_callback) (struct gfs2_glock *gl);
         const int go_type;
         const unsigned long go_min_hold_time;
+        const unsigned long go_flags;
+#define GLOF_ASPACE 1
 };
 
 enum {
@@ -225,7 +227,6 @@ struct gfs2_glock {
 
         struct gfs2_sbd *gl_sbd;
 
-        struct inode *gl_aspace;
         struct list_head gl_ail_list;
         atomic_t gl_ail_count;
         struct delayed_work gl_work;
@@ -258,7 +259,6 @@ enum {
         GIF_INVALID             = 0,
         GIF_QD_LOCKED           = 1,
         GIF_SW_PAGED            = 3,
-        GIF_USER                = 4, /* user inode, not metadata addr space */
 };
 
 
@@ -451,7 +451,6 @@ struct gfs2_tune {
         unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
         unsigned int gt_new_files_jdata;
         unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
-        unsigned int gt_stall_secs; /* Detects trouble! */
         unsigned int gt_complain_secs;
         unsigned int gt_statfs_quantum;
         unsigned int gt_statfs_slow;
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 6e220f4eee7d..b1bf2694fb2b 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -45,7 +45,7 @@ static int iget_test(struct inode *inode, void *opaque)
         struct gfs2_inode *ip = GFS2_I(inode);
         u64 *no_addr = opaque;
 
-        if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags))
+        if (ip->i_no_addr == *no_addr)
                 return 1;
 
         return 0;
@@ -58,7 +58,6 @@ static int iget_set(struct inode *inode, void *opaque)
 
         inode->i_ino = (unsigned long)*no_addr;
         ip->i_no_addr = *no_addr;
-        set_bit(GIF_USER, &ip->i_flags);
         return 0;
 }
 
@@ -84,7 +83,7 @@ static int iget_skip_test(struct inode *inode, void *opaque)
         struct gfs2_inode *ip = GFS2_I(inode);
         struct gfs2_skip_data *data = opaque;
 
-        if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){
+        if (ip->i_no_addr == data->no_addr) {
                 if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
                         data->skipped = 1;
                         return 0;
@@ -103,7 +102,6 @@ static int iget_skip_set(struct inode *inode, void *opaque)
                 return 1;
         inode->i_ino = (unsigned long)(data->no_addr);
         ip->i_no_addr = data->no_addr;
-        set_bit(GIF_USER, &ip->i_flags);
         return 0;
 }
 
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index 0e5e0e7022e5..569b46240f61 100644
--- a/fs/gfs2/lock_dlm.c
+++ b/fs/gfs2/lock_dlm.c
@@ -30,7 +30,10 @@ static void gdlm_ast(void *arg)
 
         switch (gl->gl_lksb.sb_status) {
         case -DLM_EUNLOCK: /* Unlocked, so glock can be freed */
-                kmem_cache_free(gfs2_glock_cachep, gl);
+                if (gl->gl_ops->go_flags & GLOF_ASPACE)
+                        kmem_cache_free(gfs2_glock_aspace_cachep, gl);
+                else
+                        kmem_cache_free(gfs2_glock_cachep, gl);
                 if (atomic_dec_and_test(&sdp->sd_glock_disposal))
                         wake_up(&sdp->sd_glock_wait);
                 return;
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index de97632ba32f..adc260fbea90 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -528,9 +528,9 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
                 gfs2_pin(sdp, bd->bd_bh);
                 tr->tr_num_databuf_new++;
                 sdp->sd_log_num_databuf++;
-                list_add(&le->le_list, &sdp->sd_log_le_databuf);
+                list_add_tail(&le->le_list, &sdp->sd_log_le_databuf);
         } else {
-                list_add(&le->le_list, &sdp->sd_log_le_ordered);
+                list_add_tail(&le->le_list, &sdp->sd_log_le_ordered);
         }
 out:
         gfs2_log_unlock(sdp);
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index 5b31f7741a8f..a88fadc704bb 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -52,6 +52,22 @@ static void gfs2_init_glock_once(void *foo)
         atomic_set(&gl->gl_ail_count, 0);
 }
 
+static void gfs2_init_gl_aspace_once(void *foo)
+{
+        struct gfs2_glock *gl = foo;
+        struct address_space *mapping = (struct address_space *)(gl + 1);
+
+        gfs2_init_glock_once(gl);
+        memset(mapping, 0, sizeof(*mapping));
+        INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC);
+        spin_lock_init(&mapping->tree_lock);
+        spin_lock_init(&mapping->i_mmap_lock);
+        INIT_LIST_HEAD(&mapping->private_list);
+        spin_lock_init(&mapping->private_lock);
+        INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap);
+        INIT_LIST_HEAD(&mapping->i_mmap_nonlinear);
+}
+
 /**
  * init_gfs2_fs - Register GFS2 as a filesystem
  *
@@ -78,6 +94,14 @@ static int __init init_gfs2_fs(void)
         if (!gfs2_glock_cachep)
                 goto fail;
 
+        gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock (aspace)",
+                                        sizeof(struct gfs2_glock) +
+                                        sizeof(struct address_space),
+                                        0, 0, gfs2_init_gl_aspace_once);
+
+        if (!gfs2_glock_aspace_cachep)
+                goto fail;
+
         gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
                                               sizeof(struct gfs2_inode),
                                               0,  SLAB_RECLAIM_ACCOUNT|
@@ -144,6 +168,9 @@ fail:
         if (gfs2_inode_cachep)
                 kmem_cache_destroy(gfs2_inode_cachep);
 
+        if (gfs2_glock_aspace_cachep)
+                kmem_cache_destroy(gfs2_glock_aspace_cachep);
+
         if (gfs2_glock_cachep)
                 kmem_cache_destroy(gfs2_glock_cachep);
 
@@ -169,6 +196,7 @@ static void __exit exit_gfs2_fs(void)
         kmem_cache_destroy(gfs2_rgrpd_cachep);
         kmem_cache_destroy(gfs2_bufdata_cachep);
         kmem_cache_destroy(gfs2_inode_cachep);
+        kmem_cache_destroy(gfs2_glock_aspace_cachep);
         kmem_cache_destroy(gfs2_glock_cachep);
 
         gfs2_sys_uninit();
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 6f68a5f18eb8..0bb12c80937a 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -93,49 +93,13 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
         return err;
 }
 
-static const struct address_space_operations aspace_aops = {
+const struct address_space_operations gfs2_meta_aops = {
         .writepage = gfs2_aspace_writepage,
         .releasepage = gfs2_releasepage,
         .sync_page = block_sync_page,
 };
 
 /**
- * gfs2_aspace_get - Create and initialize a struct inode structure
- * @sdp: the filesystem the aspace is in
- *
- * Right now a struct inode is just a struct inode.  Maybe Linux
- * will supply a more lightweight address space construct (that works)
- * in the future.
- *
- * Make sure pages/buffers in this aspace aren't in high memory.
- *
- * Returns: the aspace
- */
-
-struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp)
-{
-        struct inode *aspace;
-        struct gfs2_inode *ip;
-
-        aspace = new_inode(sdp->sd_vfs);
-        if (aspace) {
-                mapping_set_gfp_mask(aspace->i_mapping, GFP_NOFS);
-                aspace->i_mapping->a_ops = &aspace_aops;
-                aspace->i_size = MAX_LFS_FILESIZE;
-                ip = GFS2_I(aspace);
-                clear_bit(GIF_USER, &ip->i_flags);
-                insert_inode_hash(aspace);
-        }
-        return aspace;
-}
-
-void gfs2_aspace_put(struct inode *aspace)
-{
-        remove_inode_hash(aspace);
-        iput(aspace);
-}
-
-/**
  * gfs2_meta_sync - Sync all buffers associated with a glock
  * @gl: The glock
  *
@@ -143,7 +107,7 @@ void gfs2_aspace_put(struct inode *aspace)
 
 void gfs2_meta_sync(struct gfs2_glock *gl)
 {
-        struct address_space *mapping = gl->gl_aspace->i_mapping;
+        struct address_space *mapping = gfs2_glock2aspace(gl);
         int error;
 
         filemap_fdatawrite(mapping);
@@ -164,7 +128,7 @@ void gfs2_meta_sync(struct gfs2_glock *gl)
 
 struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create)
 {
-        struct address_space *mapping = gl->gl_aspace->i_mapping;
+        struct address_space *mapping = gfs2_glock2aspace(gl);
         struct gfs2_sbd *sdp = gl->gl_sbd;
         struct page *page;
         struct buffer_head *bh;
@@ -344,8 +308,10 @@ void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
 
 void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr, int meta)
 {
-        struct gfs2_sbd *sdp = GFS2_SB(bh->b_page->mapping->host);
+        struct address_space *mapping = bh->b_page->mapping;
+        struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping);
         struct gfs2_bufdata *bd = bh->b_private;
+
         if (test_clear_buffer_pinned(bh)) {
                 list_del_init(&bd->bd_le.le_list);
                 if (meta) {
diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h
index de270c2f9b63..6a1d9ba16411 100644
--- a/fs/gfs2/meta_io.h
+++ b/fs/gfs2/meta_io.h
@@ -37,8 +37,16 @@ static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
                0, from_head - to_head);
 }
 
-struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp);
-void gfs2_aspace_put(struct inode *aspace);
+extern const struct address_space_operations gfs2_meta_aops;
+
+static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
+{
+        struct inode *inode = mapping->host;
+        if (mapping->a_ops == &gfs2_meta_aops)
+                return (((struct gfs2_glock *)mapping) - 1)->gl_sbd;
+        else
+                return inode->i_sb->s_fs_info;
+}
 
 void gfs2_meta_sync(struct gfs2_glock *gl);
 
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index a86ed6381566..a054b526dc08 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -65,7 +65,6 @@ static void gfs2_tune_init(struct gfs2_tune *gt)
         gt->gt_quota_scale_den = 1;
         gt->gt_new_files_jdata = 0;
         gt->gt_max_readahead = 1 << 18;
-        gt->gt_stall_secs = 600;
         gt->gt_complain_secs = 10;
 }
 
@@ -1241,10 +1240,9 @@ fail_sb:
 fail_locking:
         init_locking(sdp, &mount_gh, UNDO);
 fail_lm:
+        invalidate_inodes(sb);
         gfs2_gl_hash_clear(sdp);
         gfs2_lm_unmount(sdp);
-        while (invalidate_inodes(sb))
-                yield();
 fail_sys:
         gfs2_sys_fs_del(sdp);
 fail:
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 84350e1be66d..4e64352d49de 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -976,122 +976,62 @@ out:
 }
 
 /**
- * gfs2_readlinki - return the contents of a symlink
- * @ip: the symlink's inode
- * @buf: a pointer to the buffer to be filled
- * @len: a pointer to the length of @buf
+ * gfs2_follow_link - Follow a symbolic link
+ * @dentry: The dentry of the link
+ * @nd: Data that we pass to vfs_follow_link()
  *
- * If @buf is too small, a piece of memory is kmalloc()ed and needs
- * to be freed by the caller.
+ * This can handle symlinks of any size.
  *
- * Returns: errno
+ * Returns: 0 on success or error code
  */
 
-static int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
+static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
+        struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
         struct gfs2_holder i_gh;
         struct buffer_head *dibh;
         unsigned int x;
+        char *buf;
         int error;
 
         gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
         error = gfs2_glock_nq(&i_gh);
         if (error) {
                 gfs2_holder_uninit(&i_gh);
-                return error;
+                nd_set_link(nd, ERR_PTR(error));
+                return NULL;
         }
 
         if (!ip->i_disksize) {
                 gfs2_consist_inode(ip);
-                error = -EIO;
+                buf = ERR_PTR(-EIO);
                 goto out;
         }
 
         error = gfs2_meta_inode_buffer(ip, &dibh);
-        if (error)
+        if (error) {
+                buf = ERR_PTR(error);
                 goto out;
-
-        x = ip->i_disksize + 1;
-        if (x > *len) {
-                *buf = kmalloc(x, GFP_NOFS);
-                if (!*buf) {
-                        error = -ENOMEM;
-                        goto out_brelse;
-                }
         }
 
-        memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
-        *len = x;
-
-out_brelse:
+        x = ip->i_disksize + 1;
+        buf = kmalloc(x, GFP_NOFS);
+        if (!buf)
+                buf = ERR_PTR(-ENOMEM);
+        else
+                memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
         brelse(dibh);
 out:
         gfs2_glock_dq_uninit(&i_gh);
-        return error;
-}
-
-/**
- * gfs2_readlink - Read the value of a symlink
- * @dentry: the symlink
- * @buf: the buffer to read the symlink data into
- * @size: the size of the buffer
- *
- * Returns: errno
- */
-
-static int gfs2_readlink(struct dentry *dentry, char __user *user_buf,
-                         int user_size)
-{
-        struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
-        char array[GFS2_FAST_NAME_SIZE], *buf = array;
-        unsigned int len = GFS2_FAST_NAME_SIZE;
-        int error;
-
-        error = gfs2_readlinki(ip, &buf, &len);
-        if (error)
-                return error;
-
-        if (user_size > len - 1)
-                user_size = len - 1;
-
-        if (copy_to_user(user_buf, buf, user_size))
-                error = -EFAULT;
-        else
-                error = user_size;
-
-        if (buf != array)
-                kfree(buf);
-
-        return error;
+        nd_set_link(nd, buf);
+        return NULL;
 }
 
-/**
- * gfs2_follow_link - Follow a symbolic link
- * @dentry: The dentry of the link
- * @nd: Data that we pass to vfs_follow_link()
- *
- * This can handle symlinks of any size. It is optimised for symlinks
- * under GFS2_FAST_NAME_SIZE.
- *
- * Returns: 0 on success or error code
- */
-
-static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
+static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
 {
-        struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
-        char array[GFS2_FAST_NAME_SIZE], *buf = array;
-        unsigned int len = GFS2_FAST_NAME_SIZE;
-        int error;
-
-        error = gfs2_readlinki(ip, &buf, &len);
-        if (!error) {
-                error = vfs_follow_link(nd, buf);
-                if (buf != array)
-                        kfree(buf);
-        } else
-                path_put(&nd->path);
-
-        return ERR_PTR(error);
+        char *s = nd_get_link(nd);
+        if (!IS_ERR(s))
+                kfree(s);
 }
 
 /**
@@ -1426,8 +1366,9 @@ const struct inode_operations gfs2_dir_iops = {
 };
 
 const struct inode_operations gfs2_symlink_iops = {
-        .readlink = gfs2_readlink,
+        .readlink = generic_readlink,
         .follow_link = gfs2_follow_link,
+        .put_link = gfs2_put_link,
         .permission = gfs2_permission,
         .setattr = gfs2_setattr,
         .getattr = gfs2_getattr,
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index b9dd3da22c0a..e5e22629da67 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -722,8 +722,7 @@ static int gfs2_write_inode(struct inode *inode, int sync)
         int ret = 0;
 
         /* Check this is a "normal" inode, etc */
-        if (!test_bit(GIF_USER, &ip->i_flags) ||
-            (current->flags & PF_MEMALLOC))
+        if (current->flags & PF_MEMALLOC)
                 return 0;
         ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
         if (ret)
@@ -860,6 +859,7 @@ restart:
         gfs2_clear_rgrpd(sdp);
         gfs2_jindex_free(sdp);
         /*  Take apart glock structures and buffer lists  */
+        invalidate_inodes(sdp->sd_vfs);
         gfs2_gl_hash_clear(sdp);
         /*  Unmount the locking protocol  */
         gfs2_lm_unmount(sdp);
@@ -1194,7 +1194,7 @@ static void gfs2_drop_inode(struct inode *inode)
 {
         struct gfs2_inode *ip = GFS2_I(inode);
 
-        if (test_bit(GIF_USER, &ip->i_flags) && inode->i_nlink) {
+        if (inode->i_nlink) {
                 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
                 if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags))
                         clear_nlink(inode);
@@ -1212,18 +1212,12 @@ static void gfs2_clear_inode(struct inode *inode)
 {
         struct gfs2_inode *ip = GFS2_I(inode);
 
-        /* This tells us its a "real" inode and not one which only
-         * serves to contain an address space (see rgrp.c, meta_io.c)
-         * which therefore doesn't have its own glocks.
-         */
-        if (test_bit(GIF_USER, &ip->i_flags)) {
-                ip->i_gl->gl_object = NULL;
-                gfs2_glock_put(ip->i_gl);
-                ip->i_gl = NULL;
-                if (ip->i_iopen_gh.gh_gl) {
-                        ip->i_iopen_gh.gh_gl->gl_object = NULL;
-                        gfs2_glock_dq_uninit(&ip->i_iopen_gh);
-                }
+        ip->i_gl->gl_object = NULL;
+        gfs2_glock_put(ip->i_gl);
+        ip->i_gl = NULL;
+        if (ip->i_iopen_gh.gh_gl) {
+                ip->i_iopen_gh.gh_gl->gl_object = NULL;
+                gfs2_glock_dq_uninit(&ip->i_iopen_gh);
         }
 }
 
@@ -1358,9 +1352,6 @@ static void gfs2_delete_inode(struct inode *inode)
         struct gfs2_holder gh;
         int error;
 
-        if (!test_bit(GIF_USER, &ip->i_flags))
-                goto out;
-
         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
         if (unlikely(error)) {
                 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 0dc34621f6a6..a0db1c94317d 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -478,7 +478,6 @@ TUNE_ATTR(complain_secs, 0);
 TUNE_ATTR(statfs_slow, 0);
 TUNE_ATTR(new_files_jdata, 0);
 TUNE_ATTR(quota_simul_sync, 1);
-TUNE_ATTR(stall_secs, 1);
 TUNE_ATTR(statfs_quantum, 1);
 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
 
@@ -491,7 +490,6 @@ static struct attribute *tune_attrs[] = {
         &tune_attr_complain_secs.attr,
         &tune_attr_statfs_slow.attr,
         &tune_attr_quota_simul_sync.attr,
-        &tune_attr_stall_secs.attr,
         &tune_attr_statfs_quantum.attr,
         &tune_attr_quota_scale.attr,
         &tune_attr_new_files_jdata.attr,
diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c
index f6a7efa34eb9..226f2bfbf16a 100644
--- a/fs/gfs2/util.c
+++ b/fs/gfs2/util.c
@@ -21,6 +21,7 @@
 #include "util.h"
 
 struct kmem_cache *gfs2_glock_cachep __read_mostly;
+struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
 struct kmem_cache *gfs2_inode_cachep __read_mostly;
 struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h
index 33e96b0ce9ab..b432e04600de 100644
--- a/fs/gfs2/util.h
+++ b/fs/gfs2/util.h
@@ -145,6 +145,7 @@ gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__);
 
 
 extern struct kmem_cache *gfs2_glock_cachep;
+extern struct kmem_cache *gfs2_glock_aspace_cachep;
 extern struct kmem_cache *gfs2_inode_cachep;
 extern struct kmem_cache *gfs2_bufdata_cachep;
 extern struct kmem_cache *gfs2_rgrpd_cachep;
diff --git a/fs/hpfs/anode.c b/fs/hpfs/anode.c
index 1aa88c4e0964..6a2f04bf3df0 100644
--- a/fs/hpfs/anode.c
+++ b/fs/hpfs/anode.c
@@ -353,7 +353,7 @@ int hpfs_ea_read(struct super_block *s, secno a, int ano, unsigned pos,
 }
 
 int hpfs_ea_write(struct super_block *s, secno a, int ano, unsigned pos,
-             unsigned len, char *buf)
+             unsigned len, const char *buf)
 {
         struct buffer_head *bh;
         char *data;
diff --git a/fs/hpfs/dentry.c b/fs/hpfs/dentry.c
index 940d6d150bee..67d9d36b3d5f 100644
--- a/fs/hpfs/dentry.c
+++ b/fs/hpfs/dentry.c
@@ -20,8 +20,8 @@ static int hpfs_hash_dentry(struct dentry *dentry, struct qstr *qstr)
 
         if (l == 1) if (qstr->name[0]=='.') goto x;
         if (l == 2) if (qstr->name[0]=='.' || qstr->name[1]=='.') goto x;
-        hpfs_adjust_length((char *)qstr->name, &l);
-        /*if (hpfs_chk_name((char *)qstr->name,&l))*/
+        hpfs_adjust_length(qstr->name, &l);
+        /*if (hpfs_chk_name(qstr->name,&l))*/
                 /*return -ENAMETOOLONG;*/
                 /*return -ENOENT;*/
         x:
@@ -38,14 +38,16 @@ static int hpfs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qst
 {
         unsigned al=a->len;
         unsigned bl=b->len;
-        hpfs_adjust_length((char *)a->name, &al);
-        /*hpfs_adjust_length((char *)b->name, &bl);*/
+        hpfs_adjust_length(a->name, &al);
+        /*hpfs_adjust_length(b->name, &bl);*/
         /* 'a' is the qstr of an already existing dentry, so the name
          * must be valid. 'b' must be validated first.
          */
 
-        if (hpfs_chk_name((char *)b->name, &bl)) return 1;
-        if (hpfs_compare_names(dentry->d_sb, (char *)a->name, al, (char *)b->name, bl, 0)) return 1;
+        if (hpfs_chk_name(b->name, &bl))
+                return 1;
+        if (hpfs_compare_names(dentry->d_sb, a->name, al, b->name, bl, 0))
+                return 1;
         return 0;
 }
 
diff --git a/fs/hpfs/dir.c b/fs/hpfs/dir.c
index 8865c94f55f6..26e3964a4b8c 100644
--- a/fs/hpfs/dir.c
+++ b/fs/hpfs/dir.c
@@ -59,7 +59,7 @@ static int hpfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
         struct hpfs_dirent *de;
         int lc;
         long old_pos;
-        char *tempname;
+        unsigned char *tempname;
         int c1, c2 = 0;
         int ret = 0;
 
@@ -158,11 +158,11 @@ static int hpfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
                 tempname = hpfs_translate_name(inode->i_sb, de->name, de->namelen, lc, de->not_8x3);
                 if (filldir(dirent, tempname, de->namelen, old_pos, de->fnode, DT_UNKNOWN) < 0) {
                         filp->f_pos = old_pos;
-                        if (tempname != (char *)de->name) kfree(tempname);
+                        if (tempname != de->name) kfree(tempname);
                         hpfs_brelse4(&qbh);
                         goto out;
                 }
-                if (tempname != (char *)de->name) kfree(tempname);
+                if (tempname != de->name) kfree(tempname);
                 hpfs_brelse4(&qbh);
         }
 out:
@@ -187,7 +187,7 @@ out:
 
 struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
         struct quad_buffer_head qbh;
         struct hpfs_dirent *de;
@@ -197,7 +197,7 @@ struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct name
         struct hpfs_inode_info *hpfs_result;
 
         lock_kernel();
-        if ((err = hpfs_chk_name((char *)name, &len))) {
+        if ((err = hpfs_chk_name(name, &len))) {
                 if (err == -ENAMETOOLONG) {
                         unlock_kernel();
                         return ERR_PTR(-ENAMETOOLONG);
@@ -209,7 +209,7 @@ struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct name
          * '.' and '..' will never be passed here.
          */
 
-        de = map_dirent(dir, hpfs_i(dir)->i_dno, (char *) name, len, NULL, &qbh);
+        de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, NULL, &qbh);
 
         /*
          * This is not really a bailout, just means file not found.
@@ -250,7 +250,7 @@ struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct name
         hpfs_result = hpfs_i(result);
         if (!de->directory) hpfs_result->i_parent_dir = dir->i_ino;
 
-        hpfs_decide_conv(result, (char *)name, len);
+        hpfs_decide_conv(result, name, len);
 
         if (de->has_acl || de->has_xtd_perm) if (!(dir->i_sb->s_flags & MS_RDONLY)) {
                 hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures");
diff --git a/fs/hpfs/dnode.c b/fs/hpfs/dnode.c
index fe83c2b7d2d8..9b2ffadfc8c4 100644
--- a/fs/hpfs/dnode.c
+++ b/fs/hpfs/dnode.c
@@ -158,7 +158,8 @@ static void set_last_pointer(struct super_block *s, struct dnode *d, dnode_secno
 
 /* Add an entry to dnode and don't care if it grows over 2048 bytes */
 
-struct hpfs_dirent *hpfs_add_de(struct super_block *s, struct dnode *d, unsigned char *name,
+struct hpfs_dirent *hpfs_add_de(struct super_block *s, struct dnode *d,
+                                const unsigned char *name,
                                 unsigned namelen, secno down_ptr)
 {
         struct hpfs_dirent *de;
@@ -223,7 +224,7 @@ static void fix_up_ptrs(struct super_block *s, struct dnode *d)
 /* Add an entry to dnode and do dnode splitting if required */
 
 static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
-                             unsigned char *name, unsigned namelen,
+                             const unsigned char *name, unsigned namelen,
                              struct hpfs_dirent *new_de, dnode_secno down_ptr)
 {
         struct quad_buffer_head qbh, qbh1, qbh2;
@@ -231,7 +232,7 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
         dnode_secno adno, rdno;
         struct hpfs_dirent *de;
         struct hpfs_dirent nde;
-        char *nname;
+        unsigned char *nname;
         int h;
         int pos;
         struct buffer_head *bh;
@@ -305,7 +306,9 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
                 pos++;
         }
         copy_de(new_de = &nde, de);
-        memcpy(name = nname, de->name, namelen = de->namelen);
+        memcpy(nname, de->name, de->namelen);
+        name = nname;
+        namelen = de->namelen;
         for_all_poss(i, hpfs_pos_subst, ((loff_t)dno << 4) | pos, 4);
         down_ptr = adno;
         set_last_pointer(i->i_sb, ad, de->down ? de_down_pointer(de) : 0);
@@ -368,7 +371,8 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
  * I hope, now it's finally bug-free.
  */
 
-int hpfs_add_dirent(struct inode *i, unsigned char *name, unsigned namelen,
+int hpfs_add_dirent(struct inode *i,
+                    const unsigned char *name, unsigned namelen,
                     struct hpfs_dirent *new_de, int cdepth)
 {
         struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
@@ -897,7 +901,8 @@ struct hpfs_dirent *map_pos_dirent(struct inode *inode, loff_t *posp,
 
 /* Find a dirent in tree */
 
-struct hpfs_dirent *map_dirent(struct inode *inode, dnode_secno dno, char *name, unsigned len,
+struct hpfs_dirent *map_dirent(struct inode *inode, dnode_secno dno,
+                               const unsigned char *name, unsigned len,
                                dnode_secno *dd, struct quad_buffer_head *qbh)
 {
         struct dnode *dnode;
@@ -988,8 +993,8 @@ void hpfs_remove_dtree(struct super_block *s, dnode_secno dno)
 struct hpfs_dirent *map_fnode_dirent(struct super_block *s, fnode_secno fno,
                                      struct fnode *f, struct quad_buffer_head *qbh)
 {
-        char *name1;
-        char *name2;
+        unsigned char *name1;
+        unsigned char *name2;
         int name1len, name2len;
         struct dnode *d;
         dnode_secno dno, downd;
diff --git a/fs/hpfs/ea.c b/fs/hpfs/ea.c
index 547a8384571f..45e53d972b42 100644
--- a/fs/hpfs/ea.c
+++ b/fs/hpfs/ea.c
@@ -62,8 +62,8 @@ static char *get_indirect_ea(struct super_block *s, int ano, secno a, int size)
         return ret;
 }
 
-static void set_indirect_ea(struct super_block *s, int ano, secno a, char *data,
-                            int size)
+static void set_indirect_ea(struct super_block *s, int ano, secno a,
+                            const char *data, int size)
 {
         hpfs_ea_write(s, a, ano, 0, size, data);
 }
@@ -186,7 +186,8 @@ char *hpfs_get_ea(struct super_block *s, struct fnode *fnode, char *key, int *si
  * This driver can't change sizes of eas ('cause I just don't need it).
  */
 
-void hpfs_set_ea(struct inode *inode, struct fnode *fnode, char *key, char *data, int size)
+void hpfs_set_ea(struct inode *inode, struct fnode *fnode, const char *key,
+                 const char *data, int size)
 {
         fnode_secno fno = inode->i_ino;
         struct super_block *s = inode->i_sb;
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index 701ca54c0867..97bf738cd5d6 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -215,7 +215,7 @@ secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_heade
 secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned);
 void hpfs_remove_btree(struct super_block *, struct bplus_header *);
 int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *);
-int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, char *);
+int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, const char *);
 void hpfs_ea_remove(struct super_block *, secno, int, unsigned);
 void hpfs_truncate_btree(struct super_block *, secno, int, unsigned);
 void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
@@ -244,13 +244,17 @@ extern const struct file_operations hpfs_dir_ops;
 
 void hpfs_add_pos(struct inode *, loff_t *);
 void hpfs_del_pos(struct inode *, loff_t *);
-struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *, unsigned char *, unsigned, secno);
-int hpfs_add_dirent(struct inode *, unsigned char *, unsigned, struct hpfs_dirent *, int);
+struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *,
+                                const unsigned char *, unsigned, secno);
+int hpfs_add_dirent(struct inode *, const unsigned char *, unsigned,
+                    struct hpfs_dirent *, int);
 int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int);
 void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *);
 dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);
 struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *);
-struct hpfs_dirent *map_dirent(struct inode *, dnode_secno, char *, unsigned, dnode_secno *, struct quad_buffer_head *);
+struct hpfs_dirent *map_dirent(struct inode *, dnode_secno,
+                               const unsigned char *, unsigned, dnode_secno *,
+                               struct quad_buffer_head *);
 void hpfs_remove_dtree(struct super_block *, dnode_secno);
 struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *);
 
@@ -259,7 +263,8 @@ struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct f
 void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned);
 int hpfs_read_ea(struct super_block *, struct fnode *, char *, char *, int);
 char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *);
-void hpfs_set_ea(struct inode *, struct fnode *, char *, char *, int);
+void hpfs_set_ea(struct inode *, struct fnode *, const char *,
+                 const char *, int);
 
 /* file.c */
 
@@ -282,7 +287,7 @@ void hpfs_delete_inode(struct inode *);
 
 unsigned *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
 unsigned *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
-char *hpfs_load_code_page(struct super_block *, secno);
+unsigned char *hpfs_load_code_page(struct super_block *, secno);
 secno *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
 struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **);
 struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **);
@@ -292,12 +297,13 @@ dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino);
 /* name.c */
 
 unsigned char hpfs_upcase(unsigned char *, unsigned char);
-int hpfs_chk_name(unsigned char *, unsigned *);
-char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
-int hpfs_compare_names(struct super_block *, unsigned char *, unsigned, unsigned char *, unsigned, int);
-int hpfs_is_name_long(unsigned char *, unsigned);
-void hpfs_adjust_length(unsigned char *, unsigned *);
-void hpfs_decide_conv(struct inode *, unsigned char *, unsigned);
+int hpfs_chk_name(const unsigned char *, unsigned *);
+unsigned char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
+int hpfs_compare_names(struct super_block *, const unsigned char *, unsigned,
+                       const unsigned char *, unsigned, int);
+int hpfs_is_name_long(const unsigned char *, unsigned);
+void hpfs_adjust_length(const unsigned char *, unsigned *);
+void hpfs_decide_conv(struct inode *, const unsigned char *, unsigned);
 
 /* namei.c */
 
diff --git a/fs/hpfs/inode.c b/fs/hpfs/inode.c
index fe703ae46bc7..ff90affb94e1 100644
--- a/fs/hpfs/inode.c
+++ b/fs/hpfs/inode.c
@@ -46,7 +46,7 @@ void hpfs_read_inode(struct inode *i)
         struct fnode *fnode;
         struct super_block *sb = i->i_sb;
         struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
-        unsigned char *ea;
+        void *ea;
         int ea_size;
 
         if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
@@ -112,7 +112,7 @@ void hpfs_read_inode(struct inode *i)
                 }
         }
         if (fnode->dirflag) {
-                unsigned n_dnodes, n_subdirs;
+                int n_dnodes, n_subdirs;
                 i->i_mode |= S_IFDIR;
                 i->i_op = &hpfs_dir_iops;
                 i->i_fop = &hpfs_dir_ops;
diff --git a/fs/hpfs/map.c b/fs/hpfs/map.c
index c4724589b2eb..840d033ecee8 100644
--- a/fs/hpfs/map.c
+++ b/fs/hpfs/map.c
@@ -35,7 +35,7 @@ unsigned int *hpfs_map_bitmap(struct super_block *s, unsigned bmp_block,
  * lowercasing table
  */
 
-char *hpfs_load_code_page(struct super_block *s, secno cps)
+unsigned char *hpfs_load_code_page(struct super_block *s, secno cps)
 {
         struct buffer_head *bh;
         secno cpds;
@@ -71,7 +71,7 @@ char *hpfs_load_code_page(struct super_block *s, secno cps)
                 brelse(bh);
                 return NULL;
         }
-        ptr = (char *)cpd + cpd->offs[cpi] + 6;
+        ptr = (unsigned char *)cpd + cpd->offs[cpi] + 6;
         if (!(cp_table = kmalloc(256, GFP_KERNEL))) {
                 printk("HPFS: out of memory for code page table\n");
                 brelse(bh);
@@ -217,7 +217,7 @@ struct dnode *hpfs_map_dnode(struct super_block *s, unsigned secno,
         if ((dnode = hpfs_map_4sectors(s, secno, qbh, DNODE_RD_AHEAD)))
                 if (hpfs_sb(s)->sb_chk) {
                         unsigned p, pp = 0;
-                        unsigned char *d = (char *)dnode;
+                        unsigned char *d = (unsigned char *)dnode;
                         int b = 0;
                         if (dnode->magic != DNODE_MAGIC) {
                                 hpfs_error(s, "bad magic on dnode %08x", secno);
diff --git a/fs/hpfs/name.c b/fs/hpfs/name.c
index 1f4a964384eb..f24736d7a439 100644
--- a/fs/hpfs/name.c
+++ b/fs/hpfs/name.c
@@ -8,16 +8,16 @@
 
 #include "hpfs_fn.h"
 
-static char *text_postfix[]={
+static const char *text_postfix[]={
 ".ASM", ".BAS", ".BAT", ".C", ".CC", ".CFG", ".CMD", ".CON", ".CPP", ".DEF",
 ".DOC", ".DPR", ".ERX", ".H", ".HPP", ".HTM", ".HTML", ".JAVA", ".LOG", ".PAS",
 ".RC", ".TEX", ".TXT", ".Y", ""};
 
-static char *text_prefix[]={
+static const char *text_prefix[]={
 "AUTOEXEC.", "CHANGES", "COPYING", "CONFIG.", "CREDITS", "FAQ", "FILE_ID.DIZ",
 "MAKEFILE", "READ.ME", "README", "TERMCAP", ""};
 
-void hpfs_decide_conv(struct inode *inode, unsigned char *name, unsigned len)
+void hpfs_decide_conv(struct inode *inode, const unsigned char *name, unsigned len)
 {
         struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
         int i;
@@ -71,7 +71,7 @@ static inline unsigned char locase(unsigned char *dir, unsigned char a)
         return dir[a];
 }
 
-int hpfs_chk_name(unsigned char *name, unsigned *len)
+int hpfs_chk_name(const unsigned char *name, unsigned *len)
 {
         int i;
         if (*len > 254) return -ENAMETOOLONG;
@@ -83,10 +83,10 @@ int hpfs_chk_name(unsigned char *name, unsigned *len)
         return 0;
 }
 
-char *hpfs_translate_name(struct super_block *s, unsigned char *from,
+unsigned char *hpfs_translate_name(struct super_block *s, unsigned char *from,
                           unsigned len, int lc, int lng)
 {
-        char *to;
+        unsigned char *to;
         int i;
         if (hpfs_sb(s)->sb_chk >= 2) if (hpfs_is_name_long(from, len) != lng) {
                 printk("HPFS: Long name flag mismatch - name ");
@@ -103,8 +103,9 @@ char *hpfs_translate_name(struct super_block *s, unsigned char *from,
         return to;
 }
 
-int hpfs_compare_names(struct super_block *s, unsigned char *n1, unsigned l1,
-                       unsigned char *n2, unsigned l2, int last)
+int hpfs_compare_names(struct super_block *s,
+                       const unsigned char *n1, unsigned l1,
+                       const unsigned char *n2, unsigned l2, int last)
 {
         unsigned l = l1 < l2 ? l1 : l2;
         unsigned i;
@@ -120,7 +121,7 @@ int hpfs_compare_names(struct super_block *s, unsigned char *n1, unsigned l1,
         return 0;
 }
 
-int hpfs_is_name_long(unsigned char *name, unsigned len)
+int hpfs_is_name_long(const unsigned char *name, unsigned len)
 {
         int i,j;
         for (i = 0; i < len && name[i] != '.'; i++)
@@ -134,7 +135,7 @@ int hpfs_is_name_long(unsigned char *name, unsigned len)
 
 /* OS/2 clears dots and spaces at the end of file name, so we have to */
 
-void hpfs_adjust_length(unsigned char *name, unsigned *len)
+void hpfs_adjust_length(const unsigned char *name, unsigned *len)
 {
         if (!*len) return;
         if (*len == 1 && name[0] == '.') return;
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index 82b9c4ba9ed0..11c2b4080f65 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -11,7 +11,7 @@
 
 static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
         struct quad_buffer_head qbh0;
         struct buffer_head *bh;
@@ -24,7 +24,7 @@ static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
         int r;
         struct hpfs_dirent dee;
         int err;
-        if ((err = hpfs_chk_name((char *)name, &len))) return err==-ENOENT ? -EINVAL : err;
+        if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
         lock_kernel();
         err = -ENOSPC;
         fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
@@ -62,7 +62,7 @@ static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
                 result->i_mode &= ~0222;
 
         mutex_lock(&hpfs_i(dir)->i_mutex);
-        r = hpfs_add_dirent(dir, (char *)name, len, &dee, 0);
+        r = hpfs_add_dirent(dir, name, len, &dee, 0);
         if (r == 1)
                 goto bail3;
         if (r == -1) {
@@ -121,7 +121,7 @@ bail:
 
 static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
 {
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
         struct inode *result = NULL;
         struct buffer_head *bh;
@@ -130,7 +130,7 @@ static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struc
         int r;
         struct hpfs_dirent dee;
         int err;
-        if ((err = hpfs_chk_name((char *)name, &len)))
+        if ((err = hpfs_chk_name(name, &len)))
                 return err==-ENOENT ? -EINVAL : err;
         lock_kernel();
         err = -ENOSPC;
@@ -155,7 +155,7 @@ static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struc
         result->i_op = &hpfs_file_iops;
         result->i_fop = &hpfs_file_ops;
         result->i_nlink = 1;
-        hpfs_decide_conv(result, (char *)name, len);
+        hpfs_decide_conv(result, name, len);
         hpfs_i(result)->i_parent_dir = dir->i_ino;
         result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
         result->i_ctime.tv_nsec = 0;
@@ -170,7 +170,7 @@ static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struc
         hpfs_i(result)->mmu_private = 0;
 
         mutex_lock(&hpfs_i(dir)->i_mutex);
-        r = hpfs_add_dirent(dir, (char *)name, len, &dee, 0);
+        r = hpfs_add_dirent(dir, name, len, &dee, 0);
         if (r == 1)
                 goto bail2;
         if (r == -1) {
@@ -211,7 +211,7 @@ bail:
 
 static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
 {
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
         struct buffer_head *bh;
         struct fnode *fnode;
@@ -220,7 +220,7 @@ static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t
         struct hpfs_dirent dee;
         struct inode *result = NULL;
         int err;
-        if ((err = hpfs_chk_name((char *)name, &len))) return err==-ENOENT ? -EINVAL : err;
+        if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
         if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
         if (!new_valid_dev(rdev))
                 return -EINVAL;
@@ -256,7 +256,7 @@ static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t
         init_special_inode(result, mode, rdev);
 
         mutex_lock(&hpfs_i(dir)->i_mutex);
-        r = hpfs_add_dirent(dir, (char *)name, len, &dee, 0);
+        r = hpfs_add_dirent(dir, name, len, &dee, 0);
         if (r == 1)
                 goto bail2;
         if (r == -1) {
@@ -289,7 +289,7 @@ bail:
 
 static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
 {
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
         struct buffer_head *bh;
         struct fnode *fnode;
@@ -298,7 +298,7 @@ static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *sy
         struct hpfs_dirent dee;
         struct inode *result;
         int err;
-        if ((err = hpfs_chk_name((char *)name, &len))) return err==-ENOENT ? -EINVAL : err;
+        if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
         lock_kernel();
         if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
                 unlock_kernel();
@@ -335,7 +335,7 @@ static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *sy
         result->i_data.a_ops = &hpfs_symlink_aops;
 
         mutex_lock(&hpfs_i(dir)->i_mutex);
-        r = hpfs_add_dirent(dir, (char *)name, len, &dee, 0);
+        r = hpfs_add_dirent(dir, name, len, &dee, 0);
         if (r == 1)
                 goto bail2;
         if (r == -1) {
@@ -345,7 +345,7 @@ static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *sy
         fnode->len = len;
         memcpy(fnode->name, name, len > 15 ? 15 : len);
         fnode->up = dir->i_ino;
-        hpfs_set_ea(result, fnode, "SYMLINK", (char *)symlink, strlen(symlink));
+        hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
         mark_buffer_dirty(bh);
         brelse(bh);
 
@@ -369,7 +369,7 @@ bail:
 
 static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
 {
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
         struct quad_buffer_head qbh;
         struct hpfs_dirent *de;
@@ -381,12 +381,12 @@ static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
         int err;
 
         lock_kernel();
-        hpfs_adjust_length((char *)name, &len);
+        hpfs_adjust_length(name, &len);
 again:
         mutex_lock(&hpfs_i(inode)->i_parent_mutex);
         mutex_lock(&hpfs_i(dir)->i_mutex);
         err = -ENOENT;
-        de = map_dirent(dir, hpfs_i(dir)->i_dno, (char *)name, len, &dno, &qbh);
+        de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
         if (!de)
                 goto out;
 
@@ -413,22 +413,25 @@ again:
 
                 mutex_unlock(&hpfs_i(dir)->i_mutex);
                 mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
-                d_drop(dentry);
-                spin_lock(&dentry->d_lock);
-                if (atomic_read(&dentry->d_count) > 1 ||
-                    generic_permission(inode, MAY_WRITE, NULL) ||
+                dentry_unhash(dentry);
+                if (!d_unhashed(dentry)) {
+                        dput(dentry);
+                        unlock_kernel();
+                        return -ENOSPC;
+                }
+                if (generic_permission(inode, MAY_WRITE, NULL) ||
                     !S_ISREG(inode->i_mode) ||
                     get_write_access(inode)) {
-                        spin_unlock(&dentry->d_lock);
                         d_rehash(dentry);
+                        dput(dentry);
                 } else {
                         struct iattr newattrs;
-                        spin_unlock(&dentry->d_lock);
                         /*printk("HPFS: truncating file before delete.\n");*/
                         newattrs.ia_size = 0;
                         newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
                         err = notify_change(dentry, &newattrs);
                         put_write_access(inode);
+                        dput(dentry);
                         if (!err)
                                 goto again;
                 }
@@ -451,7 +454,7 @@ out:
 
 static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
 {
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
         struct quad_buffer_head qbh;
         struct hpfs_dirent *de;
@@ -462,12 +465,12 @@ static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
         int err;
         int r;
 
-        hpfs_adjust_length((char *)name, &len);
+        hpfs_adjust_length(name, &len);
         lock_kernel();
         mutex_lock(&hpfs_i(inode)->i_parent_mutex);
         mutex_lock(&hpfs_i(dir)->i_mutex);
         err = -ENOENT;
-        de = map_dirent(dir, hpfs_i(dir)->i_dno, (char *)name, len, &dno, &qbh);
+        de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
         if (!de)
                 goto out;
 
@@ -546,10 +549,10 @@ const struct address_space_operations hpfs_symlink_aops = {
 static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                 struct inode *new_dir, struct dentry *new_dentry)
 {
-        char *old_name = (char *)old_dentry->d_name.name;
-        int old_len = old_dentry->d_name.len;
-        char *new_name = (char *)new_dentry->d_name.name;
-        int new_len = new_dentry->d_name.len;
+        const unsigned char *old_name = old_dentry->d_name.name;
+        unsigned old_len = old_dentry->d_name.len;
+        const unsigned char *new_name = new_dentry->d_name.name;
+        unsigned new_len = new_dentry->d_name.len;
         struct inode *i = old_dentry->d_inode;
         struct inode *new_inode = new_dentry->d_inode;
         struct quad_buffer_head qbh, qbh1;
@@ -560,9 +563,9 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         struct buffer_head *bh;
         struct fnode *fnode;
         int err;
-        if ((err = hpfs_chk_name((char *)new_name, &new_len))) return err;
+        if ((err = hpfs_chk_name(new_name, &new_len))) return err;
         err = 0;
-        hpfs_adjust_length((char *)old_name, &old_len);
+        hpfs_adjust_length(old_name, &old_len);
 
         lock_kernel();
         /* order doesn't matter, due to VFS exclusion */
@@ -579,7 +582,7 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                 goto end1;
         }
 
-        if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, (char *)old_name, old_len, &dno, &qbh))) {
+        if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
                 hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
                 err = -ENOENT;
                 goto end1;
@@ -590,7 +593,7 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         if (new_inode) {
                 int r;
                 if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
-                        if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, (char *)new_name, new_len, NULL, &qbh1))) {
+                        if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
                                 clear_nlink(new_inode);
                                 copy_de(nde, &de);
                                 memcpy(nde->name, new_name, new_len);
@@ -618,7 +621,7 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         }
         
         if (new_dir == old_dir)
-                if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, (char *)old_name, old_len, &dno, &qbh))) {
+                if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
                         hpfs_unlock_creation(i->i_sb);
                         hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
                         err = -ENOENT;
@@ -648,7 +651,7 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                 brelse(bh);
         }
         hpfs_i(i)->i_conv = hpfs_sb(i->i_sb)->sb_conv;
-        hpfs_decide_conv(i, (char *)new_name, new_len);
+        hpfs_decide_conv(i, new_name, new_len);
 end1:
         if (old_dir != new_dir)
                 mutex_unlock(&hpfs_i(new_dir)->i_mutex);
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 7239efc690d8..2e4dfa8593da 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -718,7 +718,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
         struct vfsmount *proc_mnt;
         int err = -ENOENT;
 
-        proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
+        proc_mnt = mntget(current->nsproxy->pid_ns->proc_mnt);
         if (IS_ERR(proc_mnt))
                 goto out;
 
diff --git a/fs/internal.h b/fs/internal.h
index e96a1667d749..8a03a5447bdf 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -70,6 +70,8 @@ extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
 
 extern void __init mnt_init(void);
 
+extern spinlock_t vfsmount_lock;
+
 /*
  * fs_struct.c
  */
diff --git a/fs/libfs.c b/fs/libfs.c
index 6e8d17e1dc4c..9e50bcf55857 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -338,28 +338,14 @@ int simple_readpage(struct file *file, struct page *page)
         return 0;
 }
 
-int simple_prepare_write(struct file *file, struct page *page,
-                        unsigned from, unsigned to)
-{
-        if (!PageUptodate(page)) {
-                if (to - from != PAGE_CACHE_SIZE)
-                        zero_user_segments(page,
-                                0, from,
-                                to, PAGE_CACHE_SIZE);
-        }
-        return 0;
-}
-
 int simple_write_begin(struct file *file, struct address_space *mapping,
                         loff_t pos, unsigned len, unsigned flags,
                         struct page **pagep, void **fsdata)
 {
         struct page *page;
         pgoff_t index;
-        unsigned from;
 
         index = pos >> PAGE_CACHE_SHIFT;
-        from = pos & (PAGE_CACHE_SIZE - 1);
 
         page = grab_cache_page_write_begin(mapping, index, flags);
         if (!page)
@@ -367,43 +353,59 @@ int simple_write_begin(struct file *file, struct address_space *mapping,
 
         *pagep = page;
 
-        return simple_prepare_write(file, page, from, from+len);
-}
-
-static int simple_commit_write(struct file *file, struct page *page,
-                               unsigned from, unsigned to)
-{
-        struct inode *inode = page->mapping->host;
-        loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
+        if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) {
+                unsigned from = pos & (PAGE_CACHE_SIZE - 1);
 
-        if (!PageUptodate(page))
-                SetPageUptodate(page);
-        /*
-         * No need to use i_size_read() here, the i_size
-         * cannot change under us because we hold the i_mutex.
-         */
-        if (pos > inode->i_size)
-                i_size_write(inode, pos);
-        set_page_dirty(page);
+                zero_user_segments(page, 0, from, from + len, PAGE_CACHE_SIZE);
+        }
         return 0;
 }
 
+/**
+ * simple_write_end - .write_end helper for non-block-device FSes
+ * @available: See .write_end of address_space_operations
+ * @file:               "
+ * @mapping:            "
+ * @pos:                "
+ * @len:                "
+ * @copied:             "
+ * @page:               "
+ * @fsdata:             "
+ *
+ * simple_write_end does the minimum needed for updating a page after writing is
+ * done. It has the same API signature as the .write_end of
+ * address_space_operations vector. So it can just be set onto .write_end for
+ * FSes that don't need any other processing. i_mutex is assumed to be held.
+ * Block based filesystems should use generic_write_end().
+ * NOTE: Even though i_size might get updated by this function, mark_inode_dirty
+ * is not called, so a filesystem that actually does store data in .write_inode
+ * should extend on what's done here with a call to mark_inode_dirty() in the
+ * case that i_size has changed.
+ */
 int simple_write_end(struct file *file, struct address_space *mapping,
                         loff_t pos, unsigned len, unsigned copied,
                         struct page *page, void *fsdata)
 {
-        unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+        struct inode *inode = page->mapping->host;
+        loff_t last_pos = pos + copied;
 
         /* zero the stale part of the page if we did a short copy */
         if (copied < len) {
-                void *kaddr = kmap_atomic(page, KM_USER0);
-                memset(kaddr + from + copied, 0, len - copied);
-                flush_dcache_page(page);
-                kunmap_atomic(kaddr, KM_USER0);
+                unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+
+                zero_user(page, from + copied, len - copied);
         }
 
-        simple_commit_write(file, page, from, from+copied);
+        if (!PageUptodate(page))
+                SetPageUptodate(page);
+        /*
+         * No need to use i_size_read() here, the i_size
+         * cannot change under us because we hold the i_mutex.
+         */
+        if (last_pos > inode->i_size)
+                i_size_write(inode, last_pos);
 
+        set_page_dirty(page);
         unlock_page(page);
         page_cache_release(page);
 
@@ -853,7 +855,6 @@ EXPORT_SYMBOL(simple_getattr);
 EXPORT_SYMBOL(simple_link);
 EXPORT_SYMBOL(simple_lookup);
 EXPORT_SYMBOL(simple_pin_fs);
-EXPORT_UNUSED_SYMBOL(simple_prepare_write);
 EXPORT_SYMBOL(simple_readpage);
 EXPORT_SYMBOL(simple_release_fs);
 EXPORT_SYMBOL(simple_rename);
diff --git a/fs/locks.c b/fs/locks.c
index a8794f233bc9..ae9ded026b7c 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1182,8 +1182,9 @@ int __break_lease(struct inode *inode, unsigned int mode)
         struct file_lock *fl;
         unsigned long break_time;
         int i_have_this_lease = 0;
+        int want_write = (mode & O_ACCMODE) != O_RDONLY;
 
-        new_fl = lease_alloc(NULL, mode & FMODE_WRITE ? F_WRLCK : F_RDLCK);
+        new_fl = lease_alloc(NULL, want_write ? F_WRLCK : F_RDLCK);
 
         lock_kernel();
 
@@ -1197,7 +1198,7 @@ int __break_lease(struct inode *inode, unsigned int mode)
                 if (fl->fl_owner == current->files)
                         i_have_this_lease = 1;
 
-        if (mode & FMODE_WRITE) {
+        if (want_write) {
                 /* If we want write access, we have to revoke any lease. */
                 future = F_UNLCK | F_INPROGRESS;
         } else if (flock->fl_type & F_INPROGRESS) {
diff --git a/fs/namei.c b/fs/namei.c
index d62fdc875f22..0741c69b3319 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -689,33 +689,20 @@ static __always_inline void follow_dotdot(struct nameidata *nd)
         set_root(nd);
 
         while(1) {
-                struct vfsmount *parent;
                 struct dentry *old = nd->path.dentry;
 
                 if (nd->path.dentry == nd->root.dentry &&
                     nd->path.mnt == nd->root.mnt) {
                         break;
                 }
-                spin_lock(&dcache_lock);
                 if (nd->path.dentry != nd->path.mnt->mnt_root) {
-                        nd->path.dentry = dget(nd->path.dentry->d_parent);
-                        spin_unlock(&dcache_lock);
+                        /* rare case of legitimate dget_parent()... */
+                        nd->path.dentry = dget_parent(nd->path.dentry);
                         dput(old);
                         break;
                 }
-                spin_unlock(&dcache_lock);
-                spin_lock(&vfsmount_lock);
-                parent = nd->path.mnt->mnt_parent;
-                if (parent == nd->path.mnt) {
-                        spin_unlock(&vfsmount_lock);
+                if (!follow_up(&nd->path))
                         break;
-                }
-                mntget(parent);
-                nd->path.dentry = dget(nd->path.mnt->mnt_mountpoint);
-                spin_unlock(&vfsmount_lock);
-                dput(old);
-                mntput(nd->path.mnt);
-                nd->path.mnt = parent;
         }
         follow_mount(&nd->path);
 }
@@ -823,6 +810,17 @@ fail:
 }
 
 /*
+ * This is a temporary kludge to deal with "automount" symlinks; proper
+ * solution is to trigger them on follow_mount(), so that do_lookup()
+ * would DTRT.  To be killed before 2.6.34-final.
+ */
+static inline int follow_on_final(struct inode *inode, unsigned lookup_flags)
+{
+        return inode && unlikely(inode->i_op->follow_link) &&
+                ((lookup_flags & LOOKUP_FOLLOW) || S_ISDIR(inode->i_mode));
+}
+
+/*
  * Name resolution.
  * This is the basic name resolution function, turning a pathname into
  * the final dentry. We expect 'base' to be positive and a directory.
@@ -942,8 +940,7 @@ last_component:
                 if (err)
                         break;
                 inode = next.dentry->d_inode;
-                if ((lookup_flags & LOOKUP_FOLLOW)
-                    && inode && inode->i_op->follow_link) {
+                if (follow_on_final(inode, lookup_flags)) {
                         err = do_follow_link(&next, nd);
                         if (err)
                                 goto return_err;
@@ -1337,7 +1334,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir)
                 return -ENOENT;
 
         BUG_ON(victim->d_parent->d_inode != dir);
-        audit_inode_child(victim->d_name.name, victim, dir);
+        audit_inode_child(victim, dir);
 
         error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
         if (error)
@@ -1493,7 +1490,7 @@ int may_open(struct path *path, int acc_mode, int flag)
          * An append-only file must be opened in append mode for writing.
          */
         if (IS_APPEND(inode)) {
-                if  ((flag & FMODE_WRITE) && !(flag & O_APPEND))
+                if  ((flag & O_ACCMODE) != O_RDONLY && !(flag & O_APPEND))
                         return -EPERM;
                 if (flag & O_TRUNC)
                         return -EPERM;
@@ -1537,7 +1534,7 @@ static int handle_truncate(struct path *path)
  * what get passed to sys_open().
  */
 static int __open_namei_create(struct nameidata *nd, struct path *path,
-                                int flag, int mode)
+                                int open_flag, int mode)
 {
         int error;
         struct dentry *dir = nd->path.dentry;
@@ -1555,7 +1552,7 @@ out_unlock:
         if (error)
                 return error;
         /* Don't check for write permission, don't truncate */
-        return may_open(&nd->path, 0, flag & ~O_TRUNC);
+        return may_open(&nd->path, 0, open_flag & ~O_TRUNC);
 }
 
 /*
@@ -1726,7 +1723,7 @@ do_last:
                 error = mnt_want_write(nd.path.mnt);
                 if (error)
                         goto exit_mutex_unlock;
-                error = __open_namei_create(&nd, &path, flag, mode);
+                error = __open_namei_create(&nd, &path, open_flag, mode);
                 if (error) {
                         mnt_drop_write(nd.path.mnt);
                         goto exit;
@@ -1788,7 +1785,7 @@ ok:
                 if (error)
                         goto exit;
         }
-        error = may_open(&nd.path, acc_mode, flag);
+        error = may_open(&nd.path, acc_mode, open_flag);
         if (error) {
                 if (will_truncate)
                         mnt_drop_write(nd.path.mnt);
@@ -2265,8 +2262,11 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
                 error = -EBUSY;
         else {
                 error = security_inode_unlink(dir, dentry);
-                if (!error)
+                if (!error) {
                         error = dir->i_op->unlink(dir, dentry);
+                        if (!error)
+                                dentry->d_inode->i_flags |= S_DEAD;
+                }
         }
         mutex_unlock(&dentry->d_inode->i_mutex);
 
@@ -2619,6 +2619,8 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
         else
                 error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
         if (!error) {
+                if (target)
+                        target->i_flags |= S_DEAD;
                 if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE))
                         d_move(old_dentry, new_dentry);
         }
@@ -2661,11 +2663,9 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                 error = vfs_rename_dir(old_dir,old_dentry,new_dir,new_dentry);
         else
                 error = vfs_rename_other(old_dir,old_dentry,new_dir,new_dentry);
-        if (!error) {
-                const char *new_name = old_dentry->d_name.name;
-                fsnotify_move(old_dir, new_dir, old_name, new_name, is_dir,
+        if (!error)
+                fsnotify_move(old_dir, new_dir, old_name, is_dir,
                               new_dentry->d_inode, old_dentry);
-        }
         fsnotify_oldname_free(old_name);
 
         return error;
diff --git a/fs/namespace.c b/fs/namespace.c
index c768f733c8d6..8174c8ab5c70 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -573,7 +573,7 @@ static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root,
                         mnt->mnt_master = old;
                         CLEAR_MNT_SHARED(mnt);
                 } else if (!(flag & CL_PRIVATE)) {
-                        if ((flag & CL_PROPAGATION) || IS_MNT_SHARED(old))
+                        if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(old))
                                 list_add(&mnt->mnt_share, &old->mnt_share);
                         if (IS_MNT_SLAVE(old))
                                 list_add(&mnt->mnt_slave, &old->mnt_slave);
@@ -737,6 +737,21 @@ static void m_stop(struct seq_file *m, void *v)
         up_read(&namespace_sem);
 }
 
+int mnt_had_events(struct proc_mounts *p)
+{
+        struct mnt_namespace *ns = p->ns;
+        int res = 0;
+
+        spin_lock(&vfsmount_lock);
+        if (p->event != ns->event) {
+                p->event = ns->event;
+                res = 1;
+        }
+        spin_unlock(&vfsmount_lock);
+
+        return res;
+}
+
 struct proc_fs_info {
         int flag;
         const char *str;
@@ -1121,8 +1136,15 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags)
 {
         struct path path;
         int retval;
+        int lookup_flags = 0;
 
-        retval = user_path(name, &path);
+        if (flags & ~(MNT_FORCE | MNT_DETACH | MNT_EXPIRE | UMOUNT_NOFOLLOW))
+                return -EINVAL;
+
+        if (!(flags & UMOUNT_NOFOLLOW))
+                lookup_flags |= LOOKUP_FOLLOW;
+
+        retval = user_path_at(AT_FDCWD, name, lookup_flags, &path);
         if (retval)
                 goto out;
         retval = -EINVAL;
@@ -1246,6 +1268,21 @@ void drop_collected_mounts(struct vfsmount *mnt)
         release_mounts(&umount_list);
 }
 
+int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+                   struct vfsmount *root)
+{
+        struct vfsmount *mnt;
+        int res = f(root, arg);
+        if (res)
+                return res;
+        list_for_each_entry(mnt, &root->mnt_list, mnt_list) {
+                res = f(mnt, arg);
+                if (res)
+                        return res;
+        }
+        return 0;
+}
+
 static void cleanup_group_ids(struct vfsmount *mnt, struct vfsmount *end)
 {
         struct vfsmount *p;
@@ -1538,7 +1575,7 @@ static int do_remount(struct path *path, int flags, int mnt_flags,
                 err = do_remount_sb(sb, flags, data, 0);
         if (!err) {
                 spin_lock(&vfsmount_lock);
-                mnt_flags |= path->mnt->mnt_flags & MNT_PNODE_MASK;
+                mnt_flags |= path->mnt->mnt_flags & MNT_PROPAGATION_MASK;
                 path->mnt->mnt_flags = mnt_flags;
                 spin_unlock(&vfsmount_lock);
         }
@@ -1671,7 +1708,7 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path,
 {
         int err;
 
-        mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD);
+        mnt_flags &= ~(MNT_SHARED | MNT_WRITE_HOLD | MNT_INTERNAL);
 
         down_write(&namespace_sem);
         /* Something was mounted here while we slept */
@@ -2314,17 +2351,13 @@ void __init mnt_init(void)
 
 void put_mnt_ns(struct mnt_namespace *ns)
 {
-        struct vfsmount *root;
         LIST_HEAD(umount_list);
 
-        if (!atomic_dec_and_lock(&ns->count, &vfsmount_lock))
+        if (!atomic_dec_and_test(&ns->count))
                 return;
-        root = ns->root;
-        ns->root = NULL;
-        spin_unlock(&vfsmount_lock);
         down_write(&namespace_sem);
         spin_lock(&vfsmount_lock);
-        umount_tree(root, 0, &umount_list);
+        umount_tree(ns->root, 0, &umount_list);
         spin_unlock(&vfsmount_lock);
         up_write(&namespace_sem);
         release_mounts(&umount_list);
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 59e5673b4597..a43d07e7b924 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -95,8 +95,7 @@ config ROOT_NFS
           Most people say N here.
 
 config NFS_FSCACHE
-        bool "Provide NFS client caching support (EXPERIMENTAL)"
-        depends on EXPERIMENTAL
+        bool "Provide NFS client caching support"
         depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
         help
           Say Y here if you want NFS data to be cached locally on disc through
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index e1d415e97849..0d289823e856 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -342,6 +342,7 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
                 data->res.fattr = &data->fattr;
                 data->res.eof = 0;
                 data->res.count = bytes;
+                nfs_fattr_init(&data->fattr);
                 msg.rpc_argp = &data->args;
                 msg.rpc_resp = &data->res;
 
@@ -575,6 +576,7 @@ static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
         data->res.count = 0;
         data->res.fattr = &data->fattr;
         data->res.verf = &data->verf;
+        nfs_fattr_init(&data->fattr);
 
         NFS_PROTO(data->inode)->commit_setup(data, &msg);
 
@@ -766,6 +768,7 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
                 data->res.fattr = &data->fattr;
                 data->res.count = bytes;
                 data->res.verf = &data->verf;
+                nfs_fattr_init(&data->fattr);
 
                 task_setup_data.task = &data->task;
                 task_setup_data.callback_data = data;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index f141bde7756a..7570573bdb30 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -574,14 +574,14 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
         nfs_revalidate_inode(server, inode);
 }
 
-static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred)
+static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
 {
         struct nfs_open_context *ctx;
 
         ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
         if (ctx != NULL) {
-                ctx->path.dentry = dget(dentry);
-                ctx->path.mnt = mntget(mnt);
+                ctx->path = *path;
+                path_get(&ctx->path);
                 ctx->cred = get_rpccred(cred);
                 ctx->state = NULL;
                 ctx->lockowner = current->files;
@@ -686,7 +686,7 @@ int nfs_open(struct inode *inode, struct file *filp)
         cred = rpc_lookup_cred();
         if (IS_ERR(cred))
                 return PTR_ERR(cred);
-        ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred);
+        ctx = alloc_nfs_open_context(&filp->f_path, cred);
         put_rpccred(cred);
         if (ctx == NULL)
                 return -ENOMEM;
diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h
index 46d779abafd3..1d8d5c813b01 100644
--- a/fs/nfs/iostat.h
+++ b/fs/nfs/iostat.h
@@ -57,12 +57,12 @@ static inline void nfs_add_fscache_stats(struct inode *inode,
 }
 #endif
 
-static inline struct nfs_iostats *nfs_alloc_iostats(void)
+static inline struct nfs_iostats __percpu *nfs_alloc_iostats(void)
 {
         return alloc_percpu(struct nfs_iostats);
 }
 
-static inline void nfs_free_iostats(struct nfs_iostats *stats)
+static inline void nfs_free_iostats(struct nfs_iostats __percpu *stats)
 {
         if (stats != NULL)
                 free_percpu(stats);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 375f0fae2c6a..84d83be25a98 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -724,8 +724,8 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
         p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
         if (p->o_arg.seqid == NULL)
                 goto err_free;
-        p->path.mnt = mntget(path->mnt);
-        p->path.dentry = dget(path->dentry);
+        path_get(path);
+        p->path = *path;
         p->dir = parent;
         p->owner = sp;
         atomic_inc(&sp->so_count);
@@ -1944,8 +1944,8 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
         calldata->res.seqid = calldata->arg.seqid;
         calldata->res.server = server;
         calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
-        calldata->path.mnt = mntget(path->mnt);
-        calldata->path.dentry = dget(path->dentry);
+        path_get(path);
+        calldata->path = *path;
 
         msg.rpc_argp = &calldata->arg,
         msg.rpc_resp = &calldata->res,
diff --git a/fs/nfsctl.c b/fs/nfsctl.c
index d3854d94b7cf..bf9cbd242ddd 100644
--- a/fs/nfsctl.c
+++ b/fs/nfsctl.c
@@ -36,10 +36,9 @@ static struct file *do_open(char *name, int flags)
                 return ERR_PTR(error);
 
         if (flags == O_RDWR)
-                error = may_open(&nd.path, MAY_READ|MAY_WRITE,
-                                           FMODE_READ|FMODE_WRITE);
+                error = may_open(&nd.path, MAY_READ|MAY_WRITE, flags);
         else
-                error = may_open(&nd.path, MAY_WRITE, FMODE_WRITE);
+                error = may_open(&nd.path, MAY_WRITE, flags);
 
         if (!error)
                 return dentry_open(nd.path.dentry, nd.path.mnt, flags,
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index a8587e90fd5a..bbf72d8f9fc0 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2121,9 +2121,15 @@ out_acl:
                  * and this is the root of a cross-mounted filesystem.
                  */
                 if (ignore_crossmnt == 0 &&
-                    exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
-                        err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
-                                exp->ex_path.mnt->mnt_mountpoint, &stat);
+                    dentry == exp->ex_path.mnt->mnt_root) {
+                        struct path path = exp->ex_path;
+                        path_get(&path);
+                        while (follow_up(&path)) {
+                                if (path.dentry != path.mnt->mnt_root)
+                                        break;
+                        }
+                        err = vfs_getattr(path.mnt, path.dentry, &stat);
+                        path_put(&path);
                         if (err)
                                 goto out_nfserr;
                 }
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 97d79eff6b7f..15dc2deaac5f 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -361,7 +361,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
                  * If we are changing the size of the file, then
                  * we need to break all leases.
                  */
-                host_err = break_lease(inode, FMODE_WRITE | O_NONBLOCK);
+                host_err = break_lease(inode, O_WRONLY | O_NONBLOCK);
                 if (host_err == -EWOULDBLOCK)
                         host_err = -ETIMEDOUT;
                 if (host_err) /* ENOMEM or EWOULDBLOCK */
@@ -734,7 +734,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
          * Check to see if there are any leases on this file.
          * This may block while leases are broken.
          */
-        host_err = break_lease(inode, O_NONBLOCK | ((access & NFSD_MAY_WRITE) ? FMODE_WRITE : 0));
+        host_err = break_lease(inode, O_NONBLOCK | ((access & NFSD_MAY_WRITE) ? O_WRONLY : 0));
         if (host_err == -EWOULDBLOCK)
                 host_err = -ETIMEDOUT;
         if (host_err) /* NOMEM or WOULDBLOCK */
@@ -752,7 +752,8 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
                             flags, current_cred());
         if (IS_ERR(*filp))
                 host_err = PTR_ERR(*filp);
-        host_err = ima_file_check(*filp, access);
+        else
+                host_err = ima_file_check(*filp, access);
 out_nfserr:
         err = nfserrno(host_err);
 out:
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index 187dd07ba86c..9d1e5de91afb 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -388,8 +388,7 @@ int nilfs_dat_translate(struct inode *dat, __u64 vblocknr, sector_t *blocknrp)
                 ret = -ENOENT;
                 goto out;
         }
-        if (blocknrp != NULL)
-                *blocknrp = blocknr;
+        *blocknrp = blocknr;
 
  out:
         kunmap_atomic(kaddr, KM_USER0);
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 76d803e060a9..0092840492ee 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -224,7 +224,7 @@ fail:
  * len <= NILFS_NAME_LEN and de != NULL are guaranteed by caller.
  */
 static int
-nilfs_match(int len, const char * const name, struct nilfs_dir_entry *de)
+nilfs_match(int len, const unsigned char *name, struct nilfs_dir_entry *de)
 {
         if (len != de->name_len)
                 return 0;
@@ -349,11 +349,11 @@ done:
  * Entry is guaranteed to be valid.
  */
 struct nilfs_dir_entry *
-nilfs_find_entry(struct inode *dir, struct dentry *dentry,
+nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
                  struct page **res_page)
 {
-        const char *name = dentry->d_name.name;
-        int namelen = dentry->d_name.len;
+        const unsigned char *name = qstr->name;
+        int namelen = qstr->len;
         unsigned reclen = NILFS_DIR_REC_LEN(namelen);
         unsigned long start, n;
         unsigned long npages = dir_pages(dir);
@@ -424,13 +424,13 @@ struct nilfs_dir_entry *nilfs_dotdot(struct inode *dir, struct page **p)
         return de;
 }
 
-ino_t nilfs_inode_by_name(struct inode *dir, struct dentry *dentry)
+ino_t nilfs_inode_by_name(struct inode *dir, const struct qstr *qstr)
 {
         ino_t res = 0;
         struct nilfs_dir_entry *de;
         struct page *page;
 
-        de = nilfs_find_entry(dir, dentry, &page);
+        de = nilfs_find_entry(dir, qstr, &page);
         if (de) {
                 res = le64_to_cpu(de->inode);
                 kunmap(page);
@@ -465,7 +465,7 @@ void nilfs_set_link(struct inode *dir, struct nilfs_dir_entry *de,
 int nilfs_add_link(struct dentry *dentry, struct inode *inode)
 {
         struct inode *dir = dentry->d_parent->d_inode;
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         int namelen = dentry->d_name.len;
         unsigned chunk_size = nilfs_chunk_size(dir);
         unsigned reclen = NILFS_DIR_REC_LEN(namelen);
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index d6b2b83de363..313d0a21da48 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -26,6 +26,7 @@
 #include <linux/capability.h>   /* capable() */
 #include <linux/uaccess.h>      /* copy_from_user(), copy_to_user() */
 #include <linux/vmalloc.h>
+#include <linux/mount.h>        /* mnt_want_write(), mnt_drop_write() */
 #include <linux/nilfs2_fs.h>
 #include "nilfs.h"
 #include "segment.h"
@@ -107,20 +108,28 @@ static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp,
 
         if (!capable(CAP_SYS_ADMIN))
                 return -EPERM;
+
+        ret = mnt_want_write(filp->f_path.mnt);
+        if (ret)
+                return ret;
+
+        ret = -EFAULT;
         if (copy_from_user(&cpmode, argp, sizeof(cpmode)))
-                return -EFAULT;
+                goto out;
 
         mutex_lock(&nilfs->ns_mount_mutex);
+
         nilfs_transaction_begin(inode->i_sb, &ti, 0);
         ret = nilfs_cpfile_change_cpmode(
                 cpfile, cpmode.cm_cno, cpmode.cm_mode);
-        if (unlikely(ret < 0)) {
+        if (unlikely(ret < 0))
                 nilfs_transaction_abort(inode->i_sb);
-                mutex_unlock(&nilfs->ns_mount_mutex);
-                return ret;
-        }
-        nilfs_transaction_commit(inode->i_sb); /* never fails */
+        else
+                nilfs_transaction_commit(inode->i_sb); /* never fails */
+
         mutex_unlock(&nilfs->ns_mount_mutex);
+out:
+        mnt_drop_write(filp->f_path.mnt);
         return ret;
 }
 
@@ -135,16 +144,23 @@ nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp,
 
         if (!capable(CAP_SYS_ADMIN))
                 return -EPERM;
+
+        ret = mnt_want_write(filp->f_path.mnt);
+        if (ret)
+                return ret;
+
+        ret = -EFAULT;
         if (copy_from_user(&cno, argp, sizeof(cno)))
-                return -EFAULT;
+                goto out;
 
         nilfs_transaction_begin(inode->i_sb, &ti, 0);
         ret = nilfs_cpfile_delete_checkpoint(cpfile, cno);
-        if (unlikely(ret < 0)) {
+        if (unlikely(ret < 0))
                 nilfs_transaction_abort(inode->i_sb);
-                return ret;
-        }
-        nilfs_transaction_commit(inode->i_sb); /* never fails */
+        else
+                nilfs_transaction_commit(inode->i_sb); /* never fails */
+out:
+        mnt_drop_write(filp->f_path.mnt);
         return ret;
 }
 
@@ -496,12 +512,19 @@ static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
         if (!capable(CAP_SYS_ADMIN))
                 return -EPERM;
 
+        ret = mnt_want_write(filp->f_path.mnt);
+        if (ret)
+                return ret;
+
+        ret = -EFAULT;
         if (copy_from_user(argv, argp, sizeof(argv)))
-                return -EFAULT;
+                goto out;
 
+        ret = -EINVAL;
         nsegs = argv[4].v_nmembs;
         if (argv[4].v_size != argsz[4])
-                return -EINVAL;
+                goto out;
+
         /*
          * argv[4] points to segment numbers this ioctl cleans.  We
          * use kmalloc() for its buffer because memory used for the
@@ -509,9 +532,10 @@ static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
          */
         kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base,
                                nsegs * sizeof(__u64));
-        if (IS_ERR(kbufs[4]))
-                return PTR_ERR(kbufs[4]);
-
+        if (IS_ERR(kbufs[4])) {
+                ret = PTR_ERR(kbufs[4]);
+                goto out;
+        }
         nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
 
         for (n = 0; n < 4; n++) {
@@ -563,10 +587,12 @@ static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp,
                 nilfs_remove_all_gcinode(nilfs);
         clear_nilfs_gc_running(nilfs);
 
- out_free:
+out_free:
         while (--n >= 0)
                 vfree(kbufs[n]);
         kfree(kbufs[4]);
+out:
+        mnt_drop_write(filp->f_path.mnt);
         return ret;
 }
 
@@ -575,13 +601,17 @@ static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
 {
         __u64 cno;
         int ret;
+        struct the_nilfs *nilfs;
 
         ret = nilfs_construct_segment(inode->i_sb);
         if (ret < 0)
                 return ret;
 
         if (argp != NULL) {
-                cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1;
+                nilfs = NILFS_SB(inode->i_sb)->s_nilfs;
+                down_read(&nilfs->ns_segctor_sem);
+                cno = nilfs->ns_cno - 1;
+                up_read(&nilfs->ns_segctor_sem);
                 if (copy_to_user(argp, &cno, sizeof(cno)))
                         return -EFAULT;
         }
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 07ba838ef089..ad6ed2cf19b4 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -67,7 +67,7 @@ nilfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
         if (dentry->d_name.len > NILFS_NAME_LEN)
                 return ERR_PTR(-ENAMETOOLONG);
 
-        ino = nilfs_inode_by_name(dir, dentry);
+        ino = nilfs_inode_by_name(dir, &dentry->d_name);
         inode = NULL;
         if (ino) {
                 inode = nilfs_iget(dir->i_sb, ino);
@@ -81,10 +81,7 @@ struct dentry *nilfs_get_parent(struct dentry *child)
 {
         unsigned long ino;
         struct inode *inode;
-        struct dentry dotdot;
-
-        dotdot.d_name.name = "..";
-        dotdot.d_name.len = 2;
+        struct qstr dotdot = {.name = "..", .len = 2};
 
         ino = nilfs_inode_by_name(child->d_inode, &dotdot);
         if (!ino)
@@ -296,7 +293,7 @@ static int nilfs_do_unlink(struct inode *dir, struct dentry *dentry)
         int err;
 
         err = -ENOENT;
-        de = nilfs_find_entry(dir, dentry, &page);
+        de = nilfs_find_entry(dir, &dentry->d_name, &page);
         if (!de)
                 goto out;
 
@@ -389,7 +386,7 @@ static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                 return err;
 
         err = -ENOENT;
-        old_de = nilfs_find_entry(old_dir, old_dentry, &old_page);
+        old_de = nilfs_find_entry(old_dir, &old_dentry->d_name, &old_page);
         if (!old_de)
                 goto out;
 
@@ -409,7 +406,7 @@ static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                         goto out_dir;
 
                 err = -ENOENT;
-                new_de = nilfs_find_entry(new_dir, new_dentry, &new_page);
+                new_de = nilfs_find_entry(new_dir, &new_dentry->d_name, &new_page);
                 if (!new_de)
                         goto out_dir;
                 inc_nlink(old_inode);
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 4da6f67e9a91..8723e5bfd071 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -217,10 +217,10 @@ static inline int nilfs_init_acl(struct inode *inode, struct inode *dir)
 
 /* dir.c */
 extern int nilfs_add_link(struct dentry *, struct inode *);
-extern ino_t nilfs_inode_by_name(struct inode *, struct dentry *);
+extern ino_t nilfs_inode_by_name(struct inode *, const struct qstr *);
 extern int nilfs_make_empty(struct inode *, struct inode *);
 extern struct nilfs_dir_entry *
-nilfs_find_entry(struct inode *, struct dentry *, struct page **);
+nilfs_find_entry(struct inode *, const struct qstr *, struct page **);
 extern int nilfs_delete_entry(struct nilfs_dir_entry *, struct page *);
 extern int nilfs_empty_dir(struct inode *);
 extern struct nilfs_dir_entry *nilfs_dotdot(struct inode *, struct page **);
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index c9c96c7825dc..017bedc761a0 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -39,7 +39,6 @@ enum {
         NILFS_SEG_FAIL_IO,
         NILFS_SEG_FAIL_MAGIC,
         NILFS_SEG_FAIL_SEQ,
-        NILFS_SEG_FAIL_CHECKSUM_SEGSUM,
         NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT,
         NILFS_SEG_FAIL_CHECKSUM_FULL,
         NILFS_SEG_FAIL_CONSISTENCY,
@@ -71,10 +70,6 @@ static int nilfs_warn_segment_error(int err)
                 printk(KERN_WARNING
                        "NILFS warning: Sequence number mismatch\n");
                 break;
-        case NILFS_SEG_FAIL_CHECKSUM_SEGSUM:
-                printk(KERN_WARNING
-                       "NILFS warning: Checksum error in segment summary\n");
-                break;
         case NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT:
                 printk(KERN_WARNING
                        "NILFS warning: Checksum error in super root\n");
@@ -206,19 +201,15 @@ int nilfs_read_super_root_block(struct super_block *sb, sector_t sr_block,
  * @pseg_start: start disk block number of partial segment
  * @seg_seq: sequence number requested
  * @ssi: pointer to nilfs_segsum_info struct to store information
- * @full_check: full check flag
- *              (0: only checks segment summary CRC, 1: data CRC)
  */
 static int
 load_segment_summary(struct nilfs_sb_info *sbi, sector_t pseg_start,
-                     u64 seg_seq, struct nilfs_segsum_info *ssi,
-                     int full_check)
+                     u64 seg_seq, struct nilfs_segsum_info *ssi)
 {
         struct buffer_head *bh_sum;
         struct nilfs_segment_summary *sum;
-        unsigned long offset, nblock;
-        u64 check_bytes;
-        u32 crc, crc_sum;
+        unsigned long nblock;
+        u32 crc;
         int ret = NILFS_SEG_FAIL_IO;
 
         bh_sum = sb_bread(sbi->s_super, pseg_start);
@@ -237,34 +228,24 @@ load_segment_summary(struct nilfs_sb_info *sbi, sector_t pseg_start,
                 ret = NILFS_SEG_FAIL_SEQ;
                 goto failed;
         }
-        if (full_check) {
-                offset = sizeof(sum->ss_datasum);
-                check_bytes =
-                        ((u64)ssi->nblocks << sbi->s_super->s_blocksize_bits);
-                nblock = ssi->nblocks;
-                crc_sum = le32_to_cpu(sum->ss_datasum);
-                ret = NILFS_SEG_FAIL_CHECKSUM_FULL;
-        } else { /* only checks segment summary */
-                offset = sizeof(sum->ss_datasum) + sizeof(sum->ss_sumsum);
-                check_bytes = ssi->sumbytes;
-                nblock = ssi->nsumblk;
-                crc_sum = le32_to_cpu(sum->ss_sumsum);
-                ret = NILFS_SEG_FAIL_CHECKSUM_SEGSUM;
-        }
 
+        nblock = ssi->nblocks;
         if (unlikely(nblock == 0 ||
                      nblock > sbi->s_nilfs->ns_blocks_per_segment)) {
                 /* This limits the number of blocks read in the CRC check */
                 ret = NILFS_SEG_FAIL_CONSISTENCY;
                 goto failed;
         }
-        if (calc_crc_cont(sbi, bh_sum, &crc, offset, check_bytes,
+        if (calc_crc_cont(sbi, bh_sum, &crc, sizeof(sum->ss_datasum),
+                          ((u64)nblock << sbi->s_super->s_blocksize_bits),
                           pseg_start, nblock)) {
                 ret = NILFS_SEG_FAIL_IO;
                 goto failed;
         }
-        if (crc == crc_sum)
+        if (crc == le32_to_cpu(sum->ss_datasum))
                 ret = 0;
+        else
+                ret = NILFS_SEG_FAIL_CHECKSUM_FULL;
  failed:
         brelse(bh_sum);
  out:
@@ -598,7 +579,7 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
 
         while (segnum != ri->ri_segnum || pseg_start <= ri->ri_pseg_start) {
 
-                ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi, 1);
+                ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi);
                 if (ret) {
                         if (ret == NILFS_SEG_FAIL_IO) {
                                 err = -EIO;
@@ -821,7 +802,7 @@ int nilfs_search_super_root(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi,
 
         for (;;) {
                 /* Load segment summary */
-                ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi, 1);
+                ret = load_segment_summary(sbi, pseg_start, seg_seq, &ssi);
                 if (ret) {
                         if (ret == NILFS_SEG_FAIL_IO)
                                 goto failed;
diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index 645c78656aa0..ab56fe44e377 100644
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -40,6 +40,11 @@ struct nilfs_write_info {
 };
 
 
+static int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
+                              struct the_nilfs *nilfs);
+static int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf);
+
+
 static struct kmem_cache *nilfs_segbuf_cachep;
 
 static void nilfs_segbuf_init_once(void *obj)
@@ -302,6 +307,19 @@ void nilfs_truncate_logs(struct list_head *logs,
         }
 }
 
+int nilfs_write_logs(struct list_head *logs, struct the_nilfs *nilfs)
+{
+        struct nilfs_segment_buffer *segbuf;
+        int ret = 0;
+
+        list_for_each_entry(segbuf, logs, sb_list) {
+                ret = nilfs_segbuf_write(segbuf, nilfs);
+                if (ret)
+                        break;
+        }
+        return ret;
+}
+
 int nilfs_wait_on_logs(struct list_head *logs)
 {
         struct nilfs_segment_buffer *segbuf;
diff --git a/fs/nilfs2/segbuf.h b/fs/nilfs2/segbuf.h
index 6af1630fb401..94dfd3517bc0 100644
--- a/fs/nilfs2/segbuf.h
+++ b/fs/nilfs2/segbuf.h
@@ -166,13 +166,10 @@ nilfs_segbuf_add_file_buffer(struct nilfs_segment_buffer *segbuf,
         segbuf->sb_sum.nfileblk++;
 }
 
-int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
-                       struct the_nilfs *nilfs);
-int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf);
-
 void nilfs_clear_logs(struct list_head *logs);
 void nilfs_truncate_logs(struct list_head *logs,
                          struct nilfs_segment_buffer *last);
+int nilfs_write_logs(struct list_head *logs, struct the_nilfs *nilfs);
 int nilfs_wait_on_logs(struct list_head *logs);
 
 static inline void nilfs_destroy_logs(struct list_head *logs)
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 105b508b47a8..ada2f1b947a3 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1764,14 +1764,9 @@ static int nilfs_segctor_prepare_write(struct nilfs_sc_info *sci,
 static int nilfs_segctor_write(struct nilfs_sc_info *sci,
                                struct the_nilfs *nilfs)
 {
-        struct nilfs_segment_buffer *segbuf;
-        int ret = 0;
+        int ret;
 
-        list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) {
-                ret = nilfs_segbuf_write(segbuf, nilfs);
-                if (ret)
-                        break;
-        }
+        ret = nilfs_write_logs(&sci->sc_segbufs, nilfs);
         list_splice_tail_init(&sci->sc_segbufs, &sci->sc_write_logs);
         return ret;
 }
@@ -1937,8 +1932,7 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
 {
         struct nilfs_segment_buffer *segbuf;
         struct page *bd_page = NULL, *fs_page = NULL;
-        struct nilfs_sb_info *sbi = sci->sc_sbi;
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct the_nilfs *nilfs = sci->sc_sbi->s_nilfs;
         int update_sr = (sci->sc_super_root != NULL);
 
         list_for_each_entry(segbuf, &sci->sc_write_logs, sb_list) {
@@ -2020,7 +2014,7 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci)
         if (update_sr) {
                 nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start,
                                        segbuf->sb_sum.seg_seq, nilfs->ns_cno++);
-                sbi->s_super->s_dirt = 1;
+                set_nilfs_sb_dirty(nilfs);
 
                 clear_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags);
                 clear_bit(NILFS_SC_DIRTY, &sci->sc_flags);
@@ -2425,43 +2419,43 @@ int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode,
         return err;
 }
 
-struct nilfs_segctor_req {
-        int mode;
-        __u32 seq_accepted;
-        int sc_err;  /* construction failure */
-        int sb_err;  /* super block writeback failure */
-};
-
 #define FLUSH_FILE_BIT  (0x1) /* data file only */
 #define FLUSH_DAT_BIT   (1 << NILFS_DAT_INO) /* DAT only */
 
-static void nilfs_segctor_accept(struct nilfs_sc_info *sci,
-                                 struct nilfs_segctor_req *req)
+/**
+ * nilfs_segctor_accept - record accepted sequence count of log-write requests
+ * @sci: segment constructor object
+ */
+static void nilfs_segctor_accept(struct nilfs_sc_info *sci)
 {
-        req->sc_err = req->sb_err = 0;
         spin_lock(&sci->sc_state_lock);
-        req->seq_accepted = sci->sc_seq_request;
+        sci->sc_seq_accepted = sci->sc_seq_request;
         spin_unlock(&sci->sc_state_lock);
 
         if (sci->sc_timer)
                 del_timer_sync(sci->sc_timer);
 }
 
-static void nilfs_segctor_notify(struct nilfs_sc_info *sci,
-                                 struct nilfs_segctor_req *req)
+/**
+ * nilfs_segctor_notify - notify the result of request to caller threads
+ * @sci: segment constructor object
+ * @mode: mode of log forming
+ * @err: error code to be notified
+ */
+static void nilfs_segctor_notify(struct nilfs_sc_info *sci, int mode, int err)
 {
         /* Clear requests (even when the construction failed) */
         spin_lock(&sci->sc_state_lock);
 
-        if (req->mode == SC_LSEG_SR) {
+        if (mode == SC_LSEG_SR) {
                 sci->sc_state &= ~NILFS_SEGCTOR_COMMIT;
-                sci->sc_seq_done = req->seq_accepted;
-                nilfs_segctor_wakeup(sci, req->sc_err ? : req->sb_err);
+                sci->sc_seq_done = sci->sc_seq_accepted;
+                nilfs_segctor_wakeup(sci, err);
                 sci->sc_flush_request = 0;
         } else {
-                if (req->mode == SC_FLUSH_FILE)
+                if (mode == SC_FLUSH_FILE)
                         sci->sc_flush_request &= ~FLUSH_FILE_BIT;
-                else if (req->mode == SC_FLUSH_DAT)
+                else if (mode == SC_FLUSH_DAT)
                         sci->sc_flush_request &= ~FLUSH_DAT_BIT;
 
                 /* re-enable timer if checkpoint creation was not done */
@@ -2472,30 +2466,37 @@ static void nilfs_segctor_notify(struct nilfs_sc_info *sci,
         spin_unlock(&sci->sc_state_lock);
 }
 
-static int nilfs_segctor_construct(struct nilfs_sc_info *sci,
-                                   struct nilfs_segctor_req *req)
+/**
+ * nilfs_segctor_construct - form logs and write them to disk
+ * @sci: segment constructor object
+ * @mode: mode of log forming
+ */
+static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode)
 {
         struct nilfs_sb_info *sbi = sci->sc_sbi;
         struct the_nilfs *nilfs = sbi->s_nilfs;
         int err = 0;
 
+        nilfs_segctor_accept(sci);
+
         if (nilfs_discontinued(nilfs))
-                req->mode = SC_LSEG_SR;
-        if (!nilfs_segctor_confirm(sci)) {
-                err = nilfs_segctor_do_construct(sci, req->mode);
-                req->sc_err = err;
-        }
+                mode = SC_LSEG_SR;
+        if (!nilfs_segctor_confirm(sci))
+                err = nilfs_segctor_do_construct(sci, mode);
+
         if (likely(!err)) {
-                if (req->mode != SC_FLUSH_DAT)
+                if (mode != SC_FLUSH_DAT)
                         atomic_set(&nilfs->ns_ndirtyblks, 0);
                 if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) &&
                     nilfs_discontinued(nilfs)) {
                         down_write(&nilfs->ns_sem);
-                        req->sb_err = nilfs_commit_super(sbi,
-                                        nilfs_altsb_need_update(nilfs));
+                        err = nilfs_commit_super(
+                                sbi, nilfs_altsb_need_update(nilfs));
                         up_write(&nilfs->ns_sem);
                 }
         }
+
+        nilfs_segctor_notify(sci, mode, err);
         return err;
 }
 
@@ -2526,7 +2527,6 @@ int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv,
         struct nilfs_sc_info *sci = NILFS_SC(sbi);
         struct the_nilfs *nilfs = sbi->s_nilfs;
         struct nilfs_transaction_info ti;
-        struct nilfs_segctor_req req = { .mode = SC_LSEG_SR };
         int err;
 
         if (unlikely(!sci))
@@ -2547,10 +2547,8 @@ int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv,
         list_splice_tail_init(&nilfs->ns_gc_inodes, &sci->sc_gc_inodes);
 
         for (;;) {
-                nilfs_segctor_accept(sci, &req);
-                err = nilfs_segctor_construct(sci, &req);
+                err = nilfs_segctor_construct(sci, SC_LSEG_SR);
                 nilfs_remove_written_gcinodes(nilfs, &sci->sc_gc_inodes);
-                nilfs_segctor_notify(sci, &req);
 
                 if (likely(!err))
                         break;
@@ -2560,6 +2558,16 @@ int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv,
                 set_current_state(TASK_INTERRUPTIBLE);
                 schedule_timeout(sci->sc_interval);
         }
+        if (nilfs_test_opt(sbi, DISCARD)) {
+                int ret = nilfs_discard_segments(nilfs, sci->sc_freesegs,
+                                                 sci->sc_nfreesegs);
+                if (ret) {
+                        printk(KERN_WARNING
+                               "NILFS warning: error %d on discard request, "
+                               "turning discards off for the device\n", ret);
+                        nilfs_clear_opt(sbi, DISCARD);
+                }
+        }
 
  out_unlock:
         sci->sc_freesegs = NULL;
@@ -2573,13 +2581,9 @@ static void nilfs_segctor_thread_construct(struct nilfs_sc_info *sci, int mode)
 {
         struct nilfs_sb_info *sbi = sci->sc_sbi;
         struct nilfs_transaction_info ti;
-        struct nilfs_segctor_req req = { .mode = mode };
 
         nilfs_transaction_lock(sbi, &ti, 0);
-
-        nilfs_segctor_accept(sci, &req);
-        nilfs_segctor_construct(sci, &req);
-        nilfs_segctor_notify(sci, &req);
+        nilfs_segctor_construct(sci, mode);
 
         /*
          * Unclosed segment should be retried.  We do this using sc_timer.
@@ -2635,6 +2639,7 @@ static int nilfs_segctor_flush_mode(struct nilfs_sc_info *sci)
 static int nilfs_segctor_thread(void *arg)
 {
         struct nilfs_sc_info *sci = (struct nilfs_sc_info *)arg;
+        struct the_nilfs *nilfs = sci->sc_sbi->s_nilfs;
         struct timer_list timer;
         int timeout = 0;
 
@@ -2680,7 +2685,6 @@ static int nilfs_segctor_thread(void *arg)
         } else {
                 DEFINE_WAIT(wait);
                 int should_sleep = 1;
-                struct the_nilfs *nilfs;
 
                 prepare_to_wait(&sci->sc_wait_daemon, &wait,
                                 TASK_INTERRUPTIBLE);
@@ -2701,8 +2705,8 @@ static int nilfs_segctor_thread(void *arg)
                 finish_wait(&sci->sc_wait_daemon, &wait);
                 timeout = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) &&
                            time_after_eq(jiffies, sci->sc_timer->expires));
-                nilfs = sci->sc_sbi->s_nilfs;
-                if (sci->sc_super->s_dirt && nilfs_sb_need_update(nilfs))
+
+                if (nilfs_sb_dirty(nilfs) && nilfs_sb_need_update(nilfs))
                         set_nilfs_discontinued(nilfs);
         }
         goto loop;
@@ -2797,12 +2801,9 @@ static void nilfs_segctor_write_out(struct nilfs_sc_info *sci)
         do {
                 struct nilfs_sb_info *sbi = sci->sc_sbi;
                 struct nilfs_transaction_info ti;
-                struct nilfs_segctor_req req = { .mode = SC_LSEG_SR };
 
                 nilfs_transaction_lock(sbi, &ti, 0);
-                nilfs_segctor_accept(sci, &req);
-                ret = nilfs_segctor_construct(sci, &req);
-                nilfs_segctor_notify(sci, &req);
+                ret = nilfs_segctor_construct(sci, SC_LSEG_SR);
                 nilfs_transaction_unlock(sbi);
 
         } while (ret && retrycount-- > 0);
@@ -2865,8 +2866,15 @@ int nilfs_attach_segment_constructor(struct nilfs_sb_info *sbi)
         struct the_nilfs *nilfs = sbi->s_nilfs;
         int err;
 
-        /* Each field of nilfs_segctor is cleared through the initialization
-           of super-block info */
+        if (NILFS_SC(sbi)) {
+                /*
+                 * This happens if the filesystem was remounted
+                 * read/write after nilfs_error degenerated it into a
+                 * read-only mount.
+                 */
+                nilfs_detach_segment_constructor(sbi);
+        }
+
         sbi->s_sc_info = nilfs_segctor_new(sbi);
         if (!sbi->s_sc_info)
                 return -ENOMEM;
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index 3d3ab2f9864c..3155e0c7f415 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -116,6 +116,7 @@ struct nilfs_segsum_pointer {
  * @sc_wait_daemon: Daemon wait queue
  * @sc_wait_task: Start/end wait queue to control segctord task
  * @sc_seq_request: Request counter
+ * @sc_seq_accept: Accepted request count
  * @sc_seq_done: Completion counter
  * @sc_sync: Request of explicit sync operation
  * @sc_interval: Timeout value of background construction
@@ -169,6 +170,7 @@ struct nilfs_sc_info {
         wait_queue_head_t       sc_wait_task;
 
         __u32                   sc_seq_request;
+        __u32                   sc_seq_accepted;
         __u32                   sc_seq_done;
 
         int                     sc_sync;
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 8173faee31e6..92579cc4c935 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -96,9 +96,6 @@ void nilfs_error(struct super_block *sb, const char *function,
         if (!(sb->s_flags & MS_RDONLY)) {
                 struct the_nilfs *nilfs = sbi->s_nilfs;
 
-                if (!nilfs_test_opt(sbi, ERRORS_CONT))
-                        nilfs_detach_segment_constructor(sbi);
-
                 down_write(&nilfs->ns_sem);
                 if (!(nilfs->ns_mount_state & NILFS_ERROR_FS)) {
                         nilfs->ns_mount_state |= NILFS_ERROR_FS;
@@ -301,7 +298,7 @@ int nilfs_commit_super(struct nilfs_sb_info *sbi, int dupsb)
                 memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
                 nilfs->ns_sbwtime[1] = t;
         }
-        sbi->s_super->s_dirt = 0;
+        clear_nilfs_sb_dirty(nilfs);
         return nilfs_sync_super(sbi, dupsb);
 }
 
@@ -345,7 +342,7 @@ static int nilfs_sync_fs(struct super_block *sb, int wait)
                 err = nilfs_construct_segment(sb);
 
         down_write(&nilfs->ns_sem);
-        if (sb->s_dirt)
+        if (nilfs_sb_dirty(nilfs))
                 nilfs_commit_super(sbi, 1);
         up_write(&nilfs->ns_sem);
 
@@ -481,6 +478,8 @@ static int nilfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
                 seq_printf(seq, ",order=strict");
         if (nilfs_test_opt(sbi, NORECOVERY))
                 seq_printf(seq, ",norecovery");
+        if (nilfs_test_opt(sbi, DISCARD))
+                seq_printf(seq, ",discard");
 
         return 0;
 }
@@ -550,7 +549,7 @@ static const struct export_operations nilfs_export_ops = {
 enum {
         Opt_err_cont, Opt_err_panic, Opt_err_ro,
         Opt_nobarrier, Opt_snapshot, Opt_order, Opt_norecovery,
-        Opt_err,
+        Opt_discard, Opt_err,
 };
 
 static match_table_t tokens = {
@@ -561,6 +560,7 @@ static match_table_t tokens = {
         {Opt_snapshot, "cp=%u"},
         {Opt_order, "order=%s"},
         {Opt_norecovery, "norecovery"},
+        {Opt_discard, "discard"},
         {Opt_err, NULL}
 };
 
@@ -614,6 +614,9 @@ static int parse_options(char *options, struct super_block *sb)
                 case Opt_norecovery:
                         nilfs_set_opt(sbi, NORECOVERY);
                         break;
+                case Opt_discard:
+                        nilfs_set_opt(sbi, DISCARD);
+                        break;
                 default:
                         printk(KERN_ERR
                                "NILFS: Unrecognized mount option \"%s\"\n", p);
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 6241e1722efc..92733d5651d2 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -646,6 +646,44 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
         goto out;
 }
 
+int nilfs_discard_segments(struct the_nilfs *nilfs, __u64 *segnump,
+                            size_t nsegs)
+{
+        sector_t seg_start, seg_end;
+        sector_t start = 0, nblocks = 0;
+        unsigned int sects_per_block;
+        __u64 *sn;
+        int ret = 0;
+
+        sects_per_block = (1 << nilfs->ns_blocksize_bits) /
+                bdev_logical_block_size(nilfs->ns_bdev);
+        for (sn = segnump; sn < segnump + nsegs; sn++) {
+                nilfs_get_segment_range(nilfs, *sn, &seg_start, &seg_end);
+
+                if (!nblocks) {
+                        start = seg_start;
+                        nblocks = seg_end - seg_start + 1;
+                } else if (start + nblocks == seg_start) {
+                        nblocks += seg_end - seg_start + 1;
+                } else {
+                        ret = blkdev_issue_discard(nilfs->ns_bdev,
+                                                   start * sects_per_block,
+                                                   nblocks * sects_per_block,
+                                                   GFP_NOFS,
+                                                   DISCARD_FL_BARRIER);
+                        if (ret < 0)
+                                return ret;
+                        nblocks = 0;
+                }
+        }
+        if (nblocks)
+                ret = blkdev_issue_discard(nilfs->ns_bdev,
+                                           start * sects_per_block,
+                                           nblocks * sects_per_block,
+                                           GFP_NOFS, DISCARD_FL_BARRIER);
+        return ret;
+}
+
 int nilfs_count_free_blocks(struct the_nilfs *nilfs, sector_t *nblocks)
 {
         struct inode *dat = nilfs_dat_inode(nilfs);
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index 589786e33464..e9795f1724d7 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -38,6 +38,7 @@ enum {
                                    the latest checkpoint was loaded */
         THE_NILFS_DISCONTINUED, /* 'next' pointer chain has broken */
         THE_NILFS_GC_RUNNING,   /* gc process is running */
+        THE_NILFS_SB_DIRTY,     /* super block is dirty */
 };
 
 /**
@@ -197,6 +198,7 @@ THE_NILFS_FNS(INIT, init)
 THE_NILFS_FNS(LOADED, loaded)
 THE_NILFS_FNS(DISCONTINUED, discontinued)
 THE_NILFS_FNS(GC_RUNNING, gc_running)
+THE_NILFS_FNS(SB_DIRTY, sb_dirty)
 
 /* Minimum interval of periodical update of superblocks (in seconds) */
 #define NILFS_SB_FREQ           10
@@ -221,6 +223,7 @@ struct the_nilfs *find_or_create_nilfs(struct block_device *);
 void put_nilfs(struct the_nilfs *);
 int init_nilfs(struct the_nilfs *, struct nilfs_sb_info *, char *);
 int load_nilfs(struct the_nilfs *, struct nilfs_sb_info *);
+int nilfs_discard_segments(struct the_nilfs *, __u64 *, size_t);
 int nilfs_count_free_blocks(struct the_nilfs *, sector_t *);
 struct nilfs_sb_info *nilfs_find_sbinfo(struct the_nilfs *, int, __u64);
 int nilfs_checkpoint_is_mounted(struct the_nilfs *, __u64, int);
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index a94e8bd8eb1f..472cdf29ef82 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -29,14 +29,12 @@
 #include <linux/init.h> /* module_init */
 #include <linux/inotify.h>
 #include <linux/kernel.h> /* roundup() */
-#include <linux/magic.h> /* superblock magic number */
-#include <linux/mount.h> /* mntget */
 #include <linux/namei.h> /* LOOKUP_FOLLOW */
-#include <linux/path.h> /* struct path */
 #include <linux/sched.h> /* struct user */
 #include <linux/slab.h> /* struct kmem_cache */
 #include <linux/syscalls.h>
 #include <linux/types.h>
+#include <linux/anon_inodes.h>
 #include <linux/uaccess.h>
 #include <linux/poll.h>
 #include <linux/wait.h>
@@ -45,8 +43,6 @@
 
 #include <asm/ioctls.h>
 
-static struct vfsmount *inotify_mnt __read_mostly;
-
 /* these are configurable via /proc/sys/fs/inotify/ */
 static int inotify_max_user_instances __read_mostly;
 static int inotify_max_queued_events __read_mostly;
@@ -645,9 +641,7 @@ SYSCALL_DEFINE1(inotify_init1, int, flags)
 {
         struct fsnotify_group *group;
         struct user_struct *user;
-        struct file *filp;
-        struct path path;
-        int fd, ret;
+        int ret;
 
         /* Check the IN_* constants for consistency.  */
         BUILD_BUG_ON(IN_CLOEXEC != O_CLOEXEC);
@@ -656,10 +650,6 @@ SYSCALL_DEFINE1(inotify_init1, int, flags)
         if (flags & ~(IN_CLOEXEC | IN_NONBLOCK))
                 return -EINVAL;
 
-        fd = get_unused_fd_flags(flags & O_CLOEXEC);
-        if (fd < 0)
-                return fd;
-
         user = get_current_user();
         if (unlikely(atomic_read(&user->inotify_devs) >=
                         inotify_max_user_instances)) {
@@ -676,27 +666,14 @@ SYSCALL_DEFINE1(inotify_init1, int, flags)
 
         atomic_inc(&user->inotify_devs);
 
-        path.mnt = inotify_mnt;
-        path.dentry = inotify_mnt->mnt_root;
-        path_get(&path);
-        filp = alloc_file(&path, FMODE_READ, &inotify_fops);
-        if (!filp)
-                goto Enfile;
+        ret = anon_inode_getfd("inotify", &inotify_fops, group,
+                                  O_RDONLY | flags);
+        if (ret >= 0)
+                return ret;
 
-        filp->f_flags = O_RDONLY | (flags & O_NONBLOCK);
-        filp->private_data = group;
-
-        fd_install(fd, filp);
-
-        return fd;
-
-Enfile:
-        ret = -ENFILE;
-        path_put(&path);
         atomic_dec(&user->inotify_devs);
 out_free_uid:
         free_uid(user);
-        put_unused_fd(fd);
         return ret;
 }
 
@@ -783,20 +760,6 @@ out:
         return ret;
 }
 
-static int
-inotify_get_sb(struct file_system_type *fs_type, int flags,
-               const char *dev_name, void *data, struct vfsmount *mnt)
-{
-        return get_sb_pseudo(fs_type, "inotify", NULL,
-                        INOTIFYFS_SUPER_MAGIC, mnt);
-}
-
-static struct file_system_type inotify_fs_type = {
-    .name       = "inotifyfs",
-    .get_sb     = inotify_get_sb,
-    .kill_sb    = kill_anon_super,
-};
-
 /*
  * inotify_user_setup - Our initialization function.  Note that we cannnot return
  * error because we have compiled-in VFS hooks.  So an (unlikely) failure here
@@ -804,16 +767,6 @@ static struct file_system_type inotify_fs_type = {
  */
 static int __init inotify_user_setup(void)
 {
-        int ret;
-
-        ret = register_filesystem(&inotify_fs_type);
-        if (unlikely(ret))
-                panic("inotify: register_filesystem returned %d!\n", ret);
-
-        inotify_mnt = kern_mount(&inotify_fs_type);
-        if (IS_ERR(inotify_mnt))
-                panic("inotify: kern_mount ret %ld!\n", PTR_ERR(inotify_mnt));
-
         inotify_inode_mark_cachep = KMEM_CACHE(inotify_inode_mark_entry, SLAB_PANIC);
         event_priv_cachep = KMEM_CACHE(inotify_event_private_data, SLAB_PANIC);
 
diff --git a/fs/ocfs2/Makefile b/fs/ocfs2/Makefile
index 600d2d2ade11..791c0886c060 100644
--- a/fs/ocfs2/Makefile
+++ b/fs/ocfs2/Makefile
@@ -46,6 +46,7 @@ ocfs2_stackglue-objs := stackglue.o
 ocfs2_stack_o2cb-objs := stack_o2cb.o
 ocfs2_stack_user-objs := stack_user.o
 
+obj-$(CONFIG_OCFS2_FS) += dlmfs/
 # cluster/ is always needed when OCFS2_FS for masklog support
 obj-$(CONFIG_OCFS2_FS) += cluster/
 obj-$(CONFIG_OCFS2_FS_O2CB) += dlm/
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index d17bdc718f74..2bbe1ecc08c0 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -1050,7 +1050,8 @@ static int ocfs2_create_new_meta_bhs(handle_t *handle,
                         strcpy(eb->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE);
                         eb->h_blkno = cpu_to_le64(first_blkno);
                         eb->h_fs_generation = cpu_to_le32(osb->fs_generation);
-                        eb->h_suballoc_slot = cpu_to_le16(osb->slot_num);
+                        eb->h_suballoc_slot =
+                                cpu_to_le16(meta_ac->ac_alloc_slot);
                         eb->h_suballoc_bit = cpu_to_le16(suballoc_bit_start);
                         eb->h_list.l_count =
                                 cpu_to_le16(ocfs2_extent_recs_per_eb(osb->sb));
@@ -6037,7 +6038,7 @@ static void ocfs2_truncate_log_worker(struct work_struct *work)
         if (status < 0)
                 mlog_errno(status);
         else
-                ocfs2_init_inode_steal_slot(osb);
+                ocfs2_init_steal_slots(osb);
 
         mlog_exit(status);
 }
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 7e9df11260f4..4c2a6d282c4d 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -577,8 +577,9 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
                 goto bail;
         }
 
-        /* We should already CoW the refcounted extent. */
-        BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
+        /* We should already CoW the refcounted extent in case of create. */
+        BUG_ON(create && (ext_flags & OCFS2_EXT_REFCOUNTED));
+
         /*
          * get_more_blocks() expects us to describe a hole by clearing
          * the mapped bit on bh_result().
diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c
index 1cd2934de615..b39da877b12f 100644
--- a/fs/ocfs2/cluster/masklog.c
+++ b/fs/ocfs2/cluster/masklog.c
@@ -112,6 +112,7 @@ static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = {
         define_mask(XATTR),
         define_mask(QUOTA),
         define_mask(REFCOUNT),
+        define_mask(BASTS),
         define_mask(ERROR),
         define_mask(NOTICE),
         define_mask(KTHREAD),
diff --git a/fs/ocfs2/cluster/masklog.h b/fs/ocfs2/cluster/masklog.h
index 9b4d11726cf2..3dfddbec32f2 100644
--- a/fs/ocfs2/cluster/masklog.h
+++ b/fs/ocfs2/cluster/masklog.h
@@ -114,6 +114,7 @@
 #define ML_XATTR        0x0000000020000000ULL /* ocfs2 extended attributes */
 #define ML_QUOTA        0x0000000040000000ULL /* ocfs2 quota operations */
 #define ML_REFCOUNT     0x0000000080000000ULL /* refcount tree operations */
+#define ML_BASTS        0x0000001000000000ULL /* dlmglue asts and basts */
 /* bits that are infrequently given and frequently matched in the high word */
 #define ML_ERROR        0x0000000100000000ULL /* sent to KERN_ERR */
 #define ML_NOTICE       0x0000000200000000ULL /* setn to KERN_NOTICE */
@@ -194,9 +195,9 @@ extern struct mlog_bits mlog_and_bits, mlog_not_bits;
  * previous token if args expands to nothing.
  */
 #define __mlog_printk(level, fmt, args...)                              \
-        printk(level "(%u,%lu):%s:%d " fmt, task_pid_nr(current),       \
-               __mlog_cpu_guess, __PRETTY_FUNCTION__, __LINE__ ,        \
-               ##args)
+        printk(level "(%s,%u,%lu):%s:%d " fmt, current->comm,           \
+               task_pid_nr(current), __mlog_cpu_guess,                  \
+               __PRETTY_FUNCTION__, __LINE__ , ##args)
 
 #define mlog(mask, fmt, args...) do {                                   \
         u64 __m = MLOG_MASK_PREFIX | (mask);                            \
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 28c3ec238796..765d66c70989 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -2439,7 +2439,7 @@ static int ocfs2_dx_dir_attach_index(struct ocfs2_super *osb,
         dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
         memset(dx_root, 0, osb->sb->s_blocksize);
         strcpy(dx_root->dr_signature, OCFS2_DX_ROOT_SIGNATURE);
-        dx_root->dr_suballoc_slot = cpu_to_le16(osb->slot_num);
+        dx_root->dr_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
         dx_root->dr_suballoc_bit = cpu_to_le16(dr_suballoc_bit);
         dx_root->dr_fs_generation = cpu_to_le32(osb->fs_generation);
         dx_root->dr_blkno = cpu_to_le64(dr_blkno);
diff --git a/fs/ocfs2/dlm/Makefile b/fs/ocfs2/dlm/Makefile
index 190361375700..dcebf0d920fa 100644
--- a/fs/ocfs2/dlm/Makefile
+++ b/fs/ocfs2/dlm/Makefile
@@ -1,8 +1,7 @@
 EXTRA_CFLAGS += -Ifs/ocfs2
 
-obj-$(CONFIG_OCFS2_FS_O2CB) += ocfs2_dlm.o ocfs2_dlmfs.o
+obj-$(CONFIG_OCFS2_FS_O2CB) += ocfs2_dlm.o
 
 ocfs2_dlm-objs := dlmdomain.o dlmdebug.o dlmthread.o dlmrecovery.o \
         dlmmaster.o dlmast.o dlmconvert.o dlmlock.o dlmunlock.o dlmver.o
 
-ocfs2_dlmfs-objs := userdlm.o dlmfs.o dlmfsver.o
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 344bcf90cbf4..b4f99de2caf3 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -310,7 +310,7 @@ static int dlm_recovery_thread(void *data)
         mlog(0, "dlm thread running for %s...\n", dlm->name);
 
         while (!kthread_should_stop()) {
-                if (dlm_joined(dlm)) {
+                if (dlm_domain_fully_joined(dlm)) {
                         status = dlm_do_recovery(dlm);
                         if (status == -EAGAIN) {
                                 /* do not sleep, recheck immediately. */
diff --git a/fs/ocfs2/dlmfs/Makefile b/fs/ocfs2/dlmfs/Makefile
new file mode 100644
index 000000000000..df69b4856d0d
--- /dev/null
+++ b/fs/ocfs2/dlmfs/Makefile
@@ -0,0 +1,5 @@
+EXTRA_CFLAGS += -Ifs/ocfs2
+
+obj-$(CONFIG_OCFS2_FS) += ocfs2_dlmfs.o
+
+ocfs2_dlmfs-objs := userdlm.o dlmfs.o dlmfsver.o
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index 02bf17808bdc..1b0de157a08c 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -43,24 +43,17 @@
 #include <linux/init.h>
 #include <linux/string.h>
 #include <linux/backing-dev.h>
+#include <linux/poll.h>
 
 #include <asm/uaccess.h>
 
-
-#include "cluster/nodemanager.h"
-#include "cluster/heartbeat.h"
-#include "cluster/tcp.h"
-
-#include "dlmapi.h"
-
+#include "stackglue.h"
 #include "userdlm.h"
-
 #include "dlmfsver.h"
 
 #define MLOG_MASK_PREFIX ML_DLMFS
 #include "cluster/masklog.h"
 
-#include "ocfs2_lockingver.h"
 
 static const struct super_operations dlmfs_ops;
 static const struct file_operations dlmfs_file_operations;
@@ -71,15 +64,46 @@ static struct kmem_cache *dlmfs_inode_cache;
 
 struct workqueue_struct *user_dlm_worker;
 
+
+
 /*
- * This is the userdlmfs locking protocol version.
+ * These are the ABI capabilities of dlmfs.
+ *
+ * Over time, dlmfs has added some features that were not part of the
+ * initial ABI.  Unfortunately, some of these features are not detectable
+ * via standard usage.  For example, Linux's default poll always returns
+ * POLLIN, so there is no way for a caller of poll(2) to know when dlmfs
+ * added poll support.  Instead, we provide this list of new capabilities.
+ *
+ * Capabilities is a read-only attribute.  We do it as a module parameter
+ * so we can discover it whether dlmfs is built in, loaded, or even not
+ * loaded.
  *
- * See fs/ocfs2/dlmglue.c for more details on locking versions.
+ * The ABI features are local to this machine's dlmfs mount.  This is
+ * distinct from the locking protocol, which is concerned with inter-node
+ * interaction.
+ *
+ * Capabilities:
+ * - bast       : POLLIN against the file descriptor of a held lock
+ *                signifies a bast fired on the lock.
  */
-static const struct dlm_protocol_version user_locking_protocol = {
-        .pv_major = OCFS2_LOCKING_PROTOCOL_MAJOR,
-        .pv_minor = OCFS2_LOCKING_PROTOCOL_MINOR,
-};
+#define DLMFS_CAPABILITIES "bast stackglue"
+extern int param_set_dlmfs_capabilities(const char *val,
+                                        struct kernel_param *kp)
+{
+        printk(KERN_ERR "%s: readonly parameter\n", kp->name);
+        return -EINVAL;
+}
+static int param_get_dlmfs_capabilities(char *buffer,
+                                        struct kernel_param *kp)
+{
+        return strlcpy(buffer, DLMFS_CAPABILITIES,
+                       strlen(DLMFS_CAPABILITIES) + 1);
+}
+module_param_call(capabilities, param_set_dlmfs_capabilities,
+                  param_get_dlmfs_capabilities, NULL, 0444);
+MODULE_PARM_DESC(capabilities, DLMFS_CAPABILITIES);
+
 
 /*
  * decodes a set of open flags into a valid lock level and a set of flags.
@@ -179,13 +203,46 @@ static int dlmfs_file_release(struct inode *inode,
         return 0;
 }
 
+/*
+ * We do ->setattr() just to override size changes.  Our size is the size
+ * of the LVB and nothing else.
+ */
+static int dlmfs_file_setattr(struct dentry *dentry, struct iattr *attr)
+{
+        int error;
+        struct inode *inode = dentry->d_inode;
+
+        attr->ia_valid &= ~ATTR_SIZE;
+        error = inode_change_ok(inode, attr);
+        if (!error)
+                error = inode_setattr(inode, attr);
+
+        return error;
+}
+
+static unsigned int dlmfs_file_poll(struct file *file, poll_table *wait)
+{
+        int event = 0;
+        struct inode *inode = file->f_path.dentry->d_inode;
+        struct dlmfs_inode_private *ip = DLMFS_I(inode);
+
+        poll_wait(file, &ip->ip_lockres.l_event, wait);
+
+        spin_lock(&ip->ip_lockres.l_lock);
+        if (ip->ip_lockres.l_flags & USER_LOCK_BLOCKED)
+                event = POLLIN | POLLRDNORM;
+        spin_unlock(&ip->ip_lockres.l_lock);
+
+        return event;
+}
+
 static ssize_t dlmfs_file_read(struct file *filp,
                                char __user *buf,
                                size_t count,
                                loff_t *ppos)
 {
         int bytes_left;
-        ssize_t readlen;
+        ssize_t readlen, got;
         char *lvb_buf;
         struct inode *inode = filp->f_path.dentry->d_inode;
 
@@ -211,9 +268,13 @@ static ssize_t dlmfs_file_read(struct file *filp,
         if (!lvb_buf)
                 return -ENOMEM;
 
-        user_dlm_read_lvb(inode, lvb_buf, readlen);
-        bytes_left = __copy_to_user(buf, lvb_buf, readlen);
-        readlen -= bytes_left;
+        got = user_dlm_read_lvb(inode, lvb_buf, readlen);
+        if (got) {
+                BUG_ON(got != readlen);
+                bytes_left = __copy_to_user(buf, lvb_buf, readlen);
+                readlen -= bytes_left;
+        } else
+                readlen = 0;
 
         kfree(lvb_buf);
 
@@ -272,7 +333,7 @@ static void dlmfs_init_once(void *foo)
         struct dlmfs_inode_private *ip =
                 (struct dlmfs_inode_private *) foo;
 
-        ip->ip_dlm = NULL;
+        ip->ip_conn = NULL;
         ip->ip_parent = NULL;
 
         inode_init_once(&ip->ip_vfs_inode);
@@ -314,14 +375,14 @@ static void dlmfs_clear_inode(struct inode *inode)
                 goto clear_fields;
         }
 
-        mlog(0, "we're a directory, ip->ip_dlm = 0x%p\n", ip->ip_dlm);
+        mlog(0, "we're a directory, ip->ip_conn = 0x%p\n", ip->ip_conn);
         /* we must be a directory. If required, lets unregister the
          * dlm context now. */
-        if (ip->ip_dlm)
-                user_dlm_unregister_context(ip->ip_dlm);
+        if (ip->ip_conn)
+                user_dlm_unregister(ip->ip_conn);
 clear_fields:
         ip->ip_parent = NULL;
-        ip->ip_dlm = NULL;
+        ip->ip_conn = NULL;
 }
 
 static struct backing_dev_info dlmfs_backing_dev_info = {
@@ -371,7 +432,7 @@ static struct inode *dlmfs_get_inode(struct inode *parent,
         inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 
         ip = DLMFS_I(inode);
-        ip->ip_dlm = DLMFS_I(parent)->ip_dlm;
+        ip->ip_conn = DLMFS_I(parent)->ip_conn;
 
         switch (mode & S_IFMT) {
         default:
@@ -425,13 +486,12 @@ static int dlmfs_mkdir(struct inode * dir,
         struct inode *inode = NULL;
         struct qstr *domain = &dentry->d_name;
         struct dlmfs_inode_private *ip;
-        struct dlm_ctxt *dlm;
-        struct dlm_protocol_version proto = user_locking_protocol;
+        struct ocfs2_cluster_connection *conn;
 
         mlog(0, "mkdir %.*s\n", domain->len, domain->name);
 
         /* verify that we have a proper domain */
-        if (domain->len >= O2NM_MAX_NAME_LEN) {
+        if (domain->len >= GROUP_NAME_MAX) {
                 status = -EINVAL;
                 mlog(ML_ERROR, "invalid domain name for directory.\n");
                 goto bail;
@@ -446,14 +506,14 @@ static int dlmfs_mkdir(struct inode * dir,
 
         ip = DLMFS_I(inode);
 
-        dlm = user_dlm_register_context(domain, &proto);
-        if (IS_ERR(dlm)) {
-                status = PTR_ERR(dlm);
+        conn = user_dlm_register(domain);
+        if (IS_ERR(conn)) {
+                status = PTR_ERR(conn);
                 mlog(ML_ERROR, "Error %d could not register domain \"%.*s\"\n",
                      status, domain->len, domain->name);
                 goto bail;
         }
-        ip->ip_dlm = dlm;
+        ip->ip_conn = conn;
 
         inc_nlink(dir);
         d_instantiate(dentry, inode);
@@ -549,6 +609,7 @@ static int dlmfs_fill_super(struct super_block * sb,
 static const struct file_operations dlmfs_file_operations = {
         .open           = dlmfs_file_open,
         .release        = dlmfs_file_release,
+        .poll           = dlmfs_file_poll,
         .read           = dlmfs_file_read,
         .write          = dlmfs_file_write,
 };
@@ -576,6 +637,7 @@ static const struct super_operations dlmfs_ops = {
 
 static const struct inode_operations dlmfs_file_inode_operations = {
         .getattr        = simple_getattr,
+        .setattr        = dlmfs_file_setattr,
 };
 
 static int dlmfs_get_sb(struct file_system_type *fs_type,
@@ -620,6 +682,7 @@ static int __init init_dlmfs_fs(void)
         }
         cleanup_worker = 1;
 
+        user_dlm_set_locking_protocol();
         status = register_filesystem(&dlmfs_fs_type);
 bail:
         if (status) {
diff --git a/fs/ocfs2/dlm/dlmfsver.c b/fs/ocfs2/dlmfs/dlmfsver.c
index a733b3321f83..a733b3321f83 100644
--- a/fs/ocfs2/dlm/dlmfsver.c
+++ b/fs/ocfs2/dlmfs/dlmfsver.c
diff --git a/fs/ocfs2/dlm/dlmfsver.h b/fs/ocfs2/dlmfs/dlmfsver.h
index f35eadbed25c..f35eadbed25c 100644
--- a/fs/ocfs2/dlm/dlmfsver.h
+++ b/fs/ocfs2/dlmfs/dlmfsver.h
diff --git a/fs/ocfs2/dlm/userdlm.c b/fs/ocfs2/dlmfs/userdlm.c
index 4cb1d3dae250..0499e3fb7bdb 100644
--- a/fs/ocfs2/dlm/userdlm.c
+++ b/fs/ocfs2/dlmfs/userdlm.c
@@ -34,18 +34,19 @@
 #include <linux/types.h>
 #include <linux/crc32.h>
 
-
-#include "cluster/nodemanager.h"
-#include "cluster/heartbeat.h"
-#include "cluster/tcp.h"
-
-#include "dlmapi.h"
-
+#include "ocfs2_lockingver.h"
+#include "stackglue.h"
 #include "userdlm.h"
 
 #define MLOG_MASK_PREFIX ML_DLMFS
 #include "cluster/masklog.h"
 
+
+static inline struct user_lock_res *user_lksb_to_lock_res(struct ocfs2_dlm_lksb *lksb)
+{
+        return container_of(lksb, struct user_lock_res, l_lksb);
+}
+
 static inline int user_check_wait_flag(struct user_lock_res *lockres,
                                        int flag)
 {
@@ -73,15 +74,15 @@ static inline void user_wait_on_blocked_lock(struct user_lock_res *lockres)
 }
 
 /* I heart container_of... */
-static inline struct dlm_ctxt *
-dlm_ctxt_from_user_lockres(struct user_lock_res *lockres)
+static inline struct ocfs2_cluster_connection *
+cluster_connection_from_user_lockres(struct user_lock_res *lockres)
 {
         struct dlmfs_inode_private *ip;
 
         ip = container_of(lockres,
                           struct dlmfs_inode_private,
                           ip_lockres);
-        return ip->ip_dlm;
+        return ip->ip_conn;
 }
 
 static struct inode *
@@ -103,9 +104,9 @@ static inline void user_recover_from_dlm_error(struct user_lock_res *lockres)
 }
 
 #define user_log_dlm_error(_func, _stat, _lockres) do {                 \
-        mlog(ML_ERROR, "Dlm error \"%s\" while calling %s on "          \
-                "resource %.*s: %s\n", dlm_errname(_stat), _func,       \
-                _lockres->l_namelen, _lockres->l_name, dlm_errmsg(_stat)); \
+        mlog(ML_ERROR, "Dlm error %d while calling %s on "              \
+                "resource %.*s\n", _stat, _func,                        \
+                _lockres->l_namelen, _lockres->l_name);                 \
 } while (0)
 
 /* WARNING: This function lives in a world where the only three lock
@@ -113,34 +114,35 @@ static inline void user_recover_from_dlm_error(struct user_lock_res *lockres)
  * lock types are added. */
 static inline int user_highest_compat_lock_level(int level)
 {
-        int new_level = LKM_EXMODE;
+        int new_level = DLM_LOCK_EX;
 
-        if (level == LKM_EXMODE)
-                new_level = LKM_NLMODE;
-        else if (level == LKM_PRMODE)
-                new_level = LKM_PRMODE;
+        if (level == DLM_LOCK_EX)
+                new_level = DLM_LOCK_NL;
+        else if (level == DLM_LOCK_PR)
+                new_level = DLM_LOCK_PR;
         return new_level;
 }
 
-static void user_ast(void *opaque)
+static void user_ast(struct ocfs2_dlm_lksb *lksb)
 {
-        struct user_lock_res *lockres = opaque;
-        struct dlm_lockstatus *lksb;
+        struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
+        int status;
 
-        mlog(0, "AST fired for lockres %.*s\n", lockres->l_namelen,
-             lockres->l_name);
+        mlog(ML_BASTS, "AST fired for lockres %.*s, level %d => %d\n",
+             lockres->l_namelen, lockres->l_name, lockres->l_level,
+             lockres->l_requested);
 
         spin_lock(&lockres->l_lock);
 
-        lksb = &(lockres->l_lksb);
-        if (lksb->status != DLM_NORMAL) {
+        status = ocfs2_dlm_lock_status(&lockres->l_lksb);
+        if (status) {
                 mlog(ML_ERROR, "lksb status value of %u on lockres %.*s\n",
-                     lksb->status, lockres->l_namelen, lockres->l_name);
+                     status, lockres->l_namelen, lockres->l_name);
                 spin_unlock(&lockres->l_lock);
                 return;
         }
 
-        mlog_bug_on_msg(lockres->l_requested == LKM_IVMODE,
+        mlog_bug_on_msg(lockres->l_requested == DLM_LOCK_IV,
                         "Lockres %.*s, requested ivmode. flags 0x%x\n",
                         lockres->l_namelen, lockres->l_name, lockres->l_flags);
 
@@ -148,13 +150,13 @@ static void user_ast(void *opaque)
         if (lockres->l_requested < lockres->l_level) {
                 if (lockres->l_requested <=
                     user_highest_compat_lock_level(lockres->l_blocking)) {
-                        lockres->l_blocking = LKM_NLMODE;
+                        lockres->l_blocking = DLM_LOCK_NL;
                         lockres->l_flags &= ~USER_LOCK_BLOCKED;
                 }
         }
 
         lockres->l_level = lockres->l_requested;
-        lockres->l_requested = LKM_IVMODE;
+        lockres->l_requested = DLM_LOCK_IV;
         lockres->l_flags |= USER_LOCK_ATTACHED;
         lockres->l_flags &= ~USER_LOCK_BUSY;
 
@@ -193,11 +195,11 @@ static void __user_dlm_cond_queue_lockres(struct user_lock_res *lockres)
                 return;
 
         switch (lockres->l_blocking) {
-        case LKM_EXMODE:
+        case DLM_LOCK_EX:
                 if (!lockres->l_ex_holders && !lockres->l_ro_holders)
                         queue = 1;
                 break;
-        case LKM_PRMODE:
+        case DLM_LOCK_PR:
                 if (!lockres->l_ex_holders)
                         queue = 1;
                 break;
@@ -209,12 +211,12 @@ static void __user_dlm_cond_queue_lockres(struct user_lock_res *lockres)
                 __user_dlm_queue_lockres(lockres);
 }
 
-static void user_bast(void *opaque, int level)
+static void user_bast(struct ocfs2_dlm_lksb *lksb, int level)
 {
-        struct user_lock_res *lockres = opaque;
+        struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
 
-        mlog(0, "Blocking AST fired for lockres %.*s. Blocking level %d\n",
-             lockres->l_namelen, lockres->l_name, level);
+        mlog(ML_BASTS, "BAST fired for lockres %.*s, blocking %d, level %d\n",
+             lockres->l_namelen, lockres->l_name, level, lockres->l_level);
 
         spin_lock(&lockres->l_lock);
         lockres->l_flags |= USER_LOCK_BLOCKED;
@@ -227,15 +229,15 @@ static void user_bast(void *opaque, int level)
         wake_up(&lockres->l_event);
 }
 
-static void user_unlock_ast(void *opaque, enum dlm_status status)
+static void user_unlock_ast(struct ocfs2_dlm_lksb *lksb, int status)
 {
-        struct user_lock_res *lockres = opaque;
+        struct user_lock_res *lockres = user_lksb_to_lock_res(lksb);
 
-        mlog(0, "UNLOCK AST called on lock %.*s\n", lockres->l_namelen,
-             lockres->l_name);
+        mlog(ML_BASTS, "UNLOCK AST fired for lockres %.*s, flags 0x%x\n",
+             lockres->l_namelen, lockres->l_name, lockres->l_flags);
 
-        if (status != DLM_NORMAL && status != DLM_CANCELGRANT)
-                mlog(ML_ERROR, "Dlm returns status %d\n", status);
+        if (status)
+                mlog(ML_ERROR, "dlm returns status %d\n", status);
 
         spin_lock(&lockres->l_lock);
         /* The teardown flag gets set early during the unlock process,
@@ -243,7 +245,7 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
          * for a concurrent cancel. */
         if (lockres->l_flags & USER_LOCK_IN_TEARDOWN
             && !(lockres->l_flags & USER_LOCK_IN_CANCEL)) {
-                lockres->l_level = LKM_IVMODE;
+                lockres->l_level = DLM_LOCK_IV;
         } else if (status == DLM_CANCELGRANT) {
                 /* We tried to cancel a convert request, but it was
                  * already granted. Don't clear the busy flag - the
@@ -254,7 +256,7 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
         } else {
                 BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
                 /* Cancel succeeded, we want to re-queue */
-                lockres->l_requested = LKM_IVMODE; /* cancel an
+                lockres->l_requested = DLM_LOCK_IV; /* cancel an
                                                     * upconvert
                                                     * request. */
                 lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
@@ -271,6 +273,21 @@ out_noclear:
         wake_up(&lockres->l_event);
 }
 
+/*
+ * This is the userdlmfs locking protocol version.
+ *
+ * See fs/ocfs2/dlmglue.c for more details on locking versions.
+ */
+static struct ocfs2_locking_protocol user_dlm_lproto = {
+        .lp_max_version = {
+                .pv_major = OCFS2_LOCKING_PROTOCOL_MAJOR,
+                .pv_minor = OCFS2_LOCKING_PROTOCOL_MINOR,
+        },
+        .lp_lock_ast            = user_ast,
+        .lp_blocking_ast        = user_bast,
+        .lp_unlock_ast          = user_unlock_ast,
+};
+
 static inline void user_dlm_drop_inode_ref(struct user_lock_res *lockres)
 {
         struct inode *inode;
@@ -283,10 +300,10 @@ static void user_dlm_unblock_lock(struct work_struct *work)
         int new_level, status;
         struct user_lock_res *lockres =
                 container_of(work, struct user_lock_res, l_work);
-        struct dlm_ctxt *dlm = dlm_ctxt_from_user_lockres(lockres);
+        struct ocfs2_cluster_connection *conn =
+                cluster_connection_from_user_lockres(lockres);
 
-        mlog(0, "processing lockres %.*s\n", lockres->l_namelen,
-             lockres->l_name);
+        mlog(0, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
 
         spin_lock(&lockres->l_lock);
 
@@ -304,17 +321,23 @@ static void user_dlm_unblock_lock(struct work_struct *work)
          * flag, and finally we might get another bast which re-queues
          * us before our ast for the downconvert is called. */
         if (!(lockres->l_flags & USER_LOCK_BLOCKED)) {
+                mlog(ML_BASTS, "lockres %.*s USER_LOCK_BLOCKED\n",
+                     lockres->l_namelen, lockres->l_name);
                 spin_unlock(&lockres->l_lock);
                 goto drop_ref;
         }
 
         if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
+                mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_TEARDOWN\n",
+                     lockres->l_namelen, lockres->l_name);
                 spin_unlock(&lockres->l_lock);
                 goto drop_ref;
         }
 
         if (lockres->l_flags & USER_LOCK_BUSY) {
                 if (lockres->l_flags & USER_LOCK_IN_CANCEL) {
+                        mlog(ML_BASTS, "lockres %.*s USER_LOCK_IN_CANCEL\n",
+                             lockres->l_namelen, lockres->l_name);
                         spin_unlock(&lockres->l_lock);
                         goto drop_ref;
                 }
@@ -322,32 +345,31 @@ static void user_dlm_unblock_lock(struct work_struct *work)
                 lockres->l_flags |= USER_LOCK_IN_CANCEL;
                 spin_unlock(&lockres->l_lock);
 
-                status = dlmunlock(dlm,
-                                   &lockres->l_lksb,
-                                   LKM_CANCEL,
-                                   user_unlock_ast,
-                                   lockres);
-                if (status != DLM_NORMAL)
-                        user_log_dlm_error("dlmunlock", status, lockres);
+                status = ocfs2_dlm_unlock(conn, &lockres->l_lksb,
+                                          DLM_LKF_CANCEL);
+                if (status)
+                        user_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
                 goto drop_ref;
         }
 
         /* If there are still incompat holders, we can exit safely
          * without worrying about re-queueing this lock as that will
          * happen on the last call to user_cluster_unlock. */
-        if ((lockres->l_blocking == LKM_EXMODE)
+        if ((lockres->l_blocking == DLM_LOCK_EX)
             && (lockres->l_ex_holders || lockres->l_ro_holders)) {
                 spin_unlock(&lockres->l_lock);
-                mlog(0, "can't downconvert for ex: ro = %u, ex = %u\n",
-                        lockres->l_ro_holders, lockres->l_ex_holders);
+                mlog(ML_BASTS, "lockres %.*s, EX/PR Holders %u,%u\n",
+                     lockres->l_namelen, lockres->l_name,
+                     lockres->l_ex_holders, lockres->l_ro_holders);
                 goto drop_ref;
         }
 
-        if ((lockres->l_blocking == LKM_PRMODE)
+        if ((lockres->l_blocking == DLM_LOCK_PR)
             && lockres->l_ex_holders) {
                 spin_unlock(&lockres->l_lock);
-                mlog(0, "can't downconvert for pr: ex = %u\n",
-                        lockres->l_ex_holders);
+                mlog(ML_BASTS, "lockres %.*s, EX Holders %u\n",
+                     lockres->l_namelen, lockres->l_name,
+                     lockres->l_ex_holders);
                 goto drop_ref;
         }
 
@@ -355,22 +377,17 @@ static void user_dlm_unblock_lock(struct work_struct *work)
         new_level = user_highest_compat_lock_level(lockres->l_blocking);
         lockres->l_requested = new_level;
         lockres->l_flags |= USER_LOCK_BUSY;
-        mlog(0, "Downconvert lock from %d to %d\n",
-                lockres->l_level, new_level);
+        mlog(ML_BASTS, "lockres %.*s, downconvert %d => %d\n",
+             lockres->l_namelen, lockres->l_name, lockres->l_level, new_level);
         spin_unlock(&lockres->l_lock);
 
         /* need lock downconvert request now... */
-        status = dlmlock(dlm,
-                         new_level,
-                         &lockres->l_lksb,
-                         LKM_CONVERT|LKM_VALBLK,
-                         lockres->l_name,
-                         lockres->l_namelen,
-                         user_ast,
-                         lockres,
-                         user_bast);
-        if (status != DLM_NORMAL) {
-                user_log_dlm_error("dlmlock", status, lockres);
+        status = ocfs2_dlm_lock(conn, new_level, &lockres->l_lksb,
+                                DLM_LKF_CONVERT|DLM_LKF_VALBLK,
+                                lockres->l_name,
+                                lockres->l_namelen);
+        if (status) {
+                user_log_dlm_error("ocfs2_dlm_lock", status, lockres);
                 user_recover_from_dlm_error(lockres);
         }
 
@@ -382,10 +399,10 @@ static inline void user_dlm_inc_holders(struct user_lock_res *lockres,
                                         int level)
 {
         switch(level) {
-        case LKM_EXMODE:
+        case DLM_LOCK_EX:
                 lockres->l_ex_holders++;
                 break;
-        case LKM_PRMODE:
+        case DLM_LOCK_PR:
                 lockres->l_ro_holders++;
                 break;
         default:
@@ -410,20 +427,19 @@ int user_dlm_cluster_lock(struct user_lock_res *lockres,
                           int lkm_flags)
 {
         int status, local_flags;
-        struct dlm_ctxt *dlm = dlm_ctxt_from_user_lockres(lockres);
+        struct ocfs2_cluster_connection *conn =
+                cluster_connection_from_user_lockres(lockres);
 
-        if (level != LKM_EXMODE &&
-            level != LKM_PRMODE) {
+        if (level != DLM_LOCK_EX &&
+            level != DLM_LOCK_PR) {
                 mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
                      lockres->l_namelen, lockres->l_name);
                 status = -EINVAL;
                 goto bail;
         }
 
-        mlog(0, "lockres %.*s: asking for %s lock, passed flags = 0x%x\n",
-             lockres->l_namelen, lockres->l_name,
-             (level == LKM_EXMODE) ? "LKM_EXMODE" : "LKM_PRMODE",
-             lkm_flags);
+        mlog(ML_BASTS, "lockres %.*s, level %d, flags = 0x%x\n",
+             lockres->l_namelen, lockres->l_name, level, lkm_flags);
 
 again:
         if (signal_pending(current)) {
@@ -457,35 +473,26 @@ again:
         }
 
         if (level > lockres->l_level) {
-                local_flags = lkm_flags | LKM_VALBLK;
-                if (lockres->l_level != LKM_IVMODE)
-                        local_flags |= LKM_CONVERT;
+                local_flags = lkm_flags | DLM_LKF_VALBLK;
+                if (lockres->l_level != DLM_LOCK_IV)
+                        local_flags |= DLM_LKF_CONVERT;
 
                 lockres->l_requested = level;
                 lockres->l_flags |= USER_LOCK_BUSY;
                 spin_unlock(&lockres->l_lock);
 
-                BUG_ON(level == LKM_IVMODE);
-                BUG_ON(level == LKM_NLMODE);
+                BUG_ON(level == DLM_LOCK_IV);
+                BUG_ON(level == DLM_LOCK_NL);
 
                 /* call dlm_lock to upgrade lock now */
-                status = dlmlock(dlm,
-                                 level,
-                                 &lockres->l_lksb,
-                                 local_flags,
-                                 lockres->l_name,
-                                 lockres->l_namelen,
-                                 user_ast,
-                                 lockres,
-                                 user_bast);
-                if (status != DLM_NORMAL) {
-                        if ((lkm_flags & LKM_NOQUEUE) &&
-                            (status == DLM_NOTQUEUED))
-                                status = -EAGAIN;
-                        else {
-                                user_log_dlm_error("dlmlock", status, lockres);
-                                status = -EINVAL;
-                        }
+                status = ocfs2_dlm_lock(conn, level, &lockres->l_lksb,
+                                        local_flags, lockres->l_name,
+                                        lockres->l_namelen);
+                if (status) {
+                        if ((lkm_flags & DLM_LKF_NOQUEUE) &&
+                            (status != -EAGAIN))
+                                user_log_dlm_error("ocfs2_dlm_lock",
+                                                   status, lockres);
                         user_recover_from_dlm_error(lockres);
                         goto bail;
                 }
@@ -506,11 +513,11 @@ static inline void user_dlm_dec_holders(struct user_lock_res *lockres,
                                         int level)
 {
         switch(level) {
-        case LKM_EXMODE:
+        case DLM_LOCK_EX:
                 BUG_ON(!lockres->l_ex_holders);
                 lockres->l_ex_holders--;
                 break;
-        case LKM_PRMODE:
+        case DLM_LOCK_PR:
                 BUG_ON(!lockres->l_ro_holders);
                 lockres->l_ro_holders--;
                 break;
@@ -522,8 +529,8 @@ static inline void user_dlm_dec_holders(struct user_lock_res *lockres,
 void user_dlm_cluster_unlock(struct user_lock_res *lockres,
                              int level)
 {
-        if (level != LKM_EXMODE &&
-            level != LKM_PRMODE) {
+        if (level != DLM_LOCK_EX &&
+            level != DLM_LOCK_PR) {
                 mlog(ML_ERROR, "lockres %.*s: invalid request!\n",
                      lockres->l_namelen, lockres->l_name);
                 return;
@@ -540,33 +547,40 @@ void user_dlm_write_lvb(struct inode *inode,
                         unsigned int len)
 {
         struct user_lock_res *lockres = &DLMFS_I(inode)->ip_lockres;
-        char *lvb = lockres->l_lksb.lvb;
+        char *lvb;
 
         BUG_ON(len > DLM_LVB_LEN);
 
         spin_lock(&lockres->l_lock);
 
-        BUG_ON(lockres->l_level < LKM_EXMODE);
+        BUG_ON(lockres->l_level < DLM_LOCK_EX);
+        lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
         memcpy(lvb, val, len);
 
         spin_unlock(&lockres->l_lock);
 }
 
-void user_dlm_read_lvb(struct inode *inode,
-                       char *val,
-                       unsigned int len)
+ssize_t user_dlm_read_lvb(struct inode *inode,
+                          char *val,
+                          unsigned int len)
 {
         struct user_lock_res *lockres = &DLMFS_I(inode)->ip_lockres;
-        char *lvb = lockres->l_lksb.lvb;
+        char *lvb;
+        ssize_t ret = len;
 
         BUG_ON(len > DLM_LVB_LEN);
 
         spin_lock(&lockres->l_lock);
 
-        BUG_ON(lockres->l_level < LKM_PRMODE);
-        memcpy(val, lvb, len);
+        BUG_ON(lockres->l_level < DLM_LOCK_PR);
+        if (ocfs2_dlm_lvb_valid(&lockres->l_lksb)) {
+                lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
+                memcpy(val, lvb, len);
+        } else
+                ret = 0;
 
         spin_unlock(&lockres->l_lock);
+        return ret;
 }
 
 void user_dlm_lock_res_init(struct user_lock_res *lockres,
@@ -576,9 +590,9 @@ void user_dlm_lock_res_init(struct user_lock_res *lockres,
 
         spin_lock_init(&lockres->l_lock);
         init_waitqueue_head(&lockres->l_event);
-        lockres->l_level = LKM_IVMODE;
-        lockres->l_requested = LKM_IVMODE;
-        lockres->l_blocking = LKM_IVMODE;
+        lockres->l_level = DLM_LOCK_IV;
+        lockres->l_requested = DLM_LOCK_IV;
+        lockres->l_blocking = DLM_LOCK_IV;
 
         /* should have been checked before getting here. */
         BUG_ON(dentry->d_name.len >= USER_DLM_LOCK_ID_MAX_LEN);
@@ -592,9 +606,10 @@ void user_dlm_lock_res_init(struct user_lock_res *lockres,
 int user_dlm_destroy_lock(struct user_lock_res *lockres)
 {
         int status = -EBUSY;
-        struct dlm_ctxt *dlm = dlm_ctxt_from_user_lockres(lockres);
+        struct ocfs2_cluster_connection *conn =
+                cluster_connection_from_user_lockres(lockres);
 
-        mlog(0, "asked to destroy %.*s\n", lockres->l_namelen, lockres->l_name);
+        mlog(ML_BASTS, "lockres %.*s\n", lockres->l_namelen, lockres->l_name);
 
         spin_lock(&lockres->l_lock);
         if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
@@ -627,14 +642,9 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
         lockres->l_flags |= USER_LOCK_BUSY;
         spin_unlock(&lockres->l_lock);
 
-        status = dlmunlock(dlm,
-                           &lockres->l_lksb,
-                           LKM_VALBLK,
-                           user_unlock_ast,
-                           lockres);
-        if (status != DLM_NORMAL) {
-                user_log_dlm_error("dlmunlock", status, lockres);
-                status = -EINVAL;
+        status = ocfs2_dlm_unlock(conn, &lockres->l_lksb, DLM_LKF_VALBLK);
+        if (status) {
+                user_log_dlm_error("ocfs2_dlm_unlock", status, lockres);
                 goto bail;
         }
 
@@ -645,32 +655,34 @@ bail:
         return status;
 }
 
-struct dlm_ctxt *user_dlm_register_context(struct qstr *name,
-                                           struct dlm_protocol_version *proto)
+static void user_dlm_recovery_handler_noop(int node_num,
+                                           void *recovery_data)
 {
-        struct dlm_ctxt *dlm;
-        u32 dlm_key;
-        char *domain;
-
-        domain = kmalloc(name->len + 1, GFP_NOFS);
-        if (!domain) {
-                mlog_errno(-ENOMEM);
-                return ERR_PTR(-ENOMEM);
-        }
+        /* We ignore recovery events */
+        return;
+}
 
-        dlm_key = crc32_le(0, name->name, name->len);
+void user_dlm_set_locking_protocol(void)
+{
+        ocfs2_stack_glue_set_max_proto_version(&user_dlm_lproto.lp_max_version);
+}
 
-        snprintf(domain, name->len + 1, "%.*s", name->len, name->name);
+struct ocfs2_cluster_connection *user_dlm_register(struct qstr *name)
+{
+        int rc;
+        struct ocfs2_cluster_connection *conn;
 
-        dlm = dlm_register_domain(domain, dlm_key, proto);
-        if (IS_ERR(dlm))
-                mlog_errno(PTR_ERR(dlm));
+        rc = ocfs2_cluster_connect_agnostic(name->name, name->len,
+                                            &user_dlm_lproto,
+                                            user_dlm_recovery_handler_noop,
+                                            NULL, &conn);
+        if (rc)
+                mlog_errno(rc);
 
-        kfree(domain);
-        return dlm;
+        return rc ? ERR_PTR(rc) : conn;
 }
 
-void user_dlm_unregister_context(struct dlm_ctxt *dlm)
+void user_dlm_unregister(struct ocfs2_cluster_connection *conn)
 {
-        dlm_unregister_domain(dlm);
+        ocfs2_cluster_disconnect(conn, 0);
 }
diff --git a/fs/ocfs2/dlm/userdlm.h b/fs/ocfs2/dlmfs/userdlm.h
index 0c3cc03c61fa..3b42d79531d7 100644
--- a/fs/ocfs2/dlm/userdlm.h
+++ b/fs/ocfs2/dlmfs/userdlm.h
@@ -57,7 +57,7 @@ struct user_lock_res {
         int                      l_level;
         unsigned int             l_ro_holders;
         unsigned int             l_ex_holders;
-        struct dlm_lockstatus    l_lksb;
+        struct ocfs2_dlm_lksb    l_lksb;
 
         int                      l_requested;
         int                      l_blocking;
@@ -80,15 +80,15 @@ void user_dlm_cluster_unlock(struct user_lock_res *lockres,
 void user_dlm_write_lvb(struct inode *inode,
                         const char *val,
                         unsigned int len);
-void user_dlm_read_lvb(struct inode *inode,
-                       char *val,
-                       unsigned int len);
-struct dlm_ctxt *user_dlm_register_context(struct qstr *name,
-                                           struct dlm_protocol_version *proto);
-void user_dlm_unregister_context(struct dlm_ctxt *dlm);
+ssize_t user_dlm_read_lvb(struct inode *inode,
+                          char *val,
+                          unsigned int len);
+struct ocfs2_cluster_connection *user_dlm_register(struct qstr *name);
+void user_dlm_unregister(struct ocfs2_cluster_connection *conn);
+void user_dlm_set_locking_protocol(void);
 
 struct dlmfs_inode_private {
-        struct dlm_ctxt             *ip_dlm;
+        struct ocfs2_cluster_connection *ip_conn;
 
         struct user_lock_res ip_lockres; /* unused for directories. */
         struct inode         *ip_parent;
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index e044019cb3b1..8298608d4165 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -297,6 +297,11 @@ static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres)
                 lockres->l_type == OCFS2_LOCK_TYPE_OPEN;
 }
 
+static inline struct ocfs2_lock_res *ocfs2_lksb_to_lock_res(struct ocfs2_dlm_lksb *lksb)
+{
+        return container_of(lksb, struct ocfs2_lock_res, l_lksb);
+}
+
 static inline struct inode *ocfs2_lock_res_inode(struct ocfs2_lock_res *lockres)
 {
         BUG_ON(!ocfs2_is_inode_lock(lockres));
@@ -927,6 +932,10 @@ static int ocfs2_generic_handle_bast(struct ocfs2_lock_res *lockres,
                 lockres->l_blocking = level;
         }
 
+        mlog(ML_BASTS, "lockres %s, block %d, level %d, l_block %d, dwn %d\n",
+             lockres->l_name, level, lockres->l_level, lockres->l_blocking,
+             needs_downconvert);
+
         if (needs_downconvert)
                 lockres_or_flags(lockres, OCFS2_LOCK_BLOCKED);
 
@@ -1040,18 +1049,17 @@ static unsigned int lockres_set_pending(struct ocfs2_lock_res *lockres)
         return lockres->l_pending_gen;
 }
 
-
-static void ocfs2_blocking_ast(void *opaque, int level)
+static void ocfs2_blocking_ast(struct ocfs2_dlm_lksb *lksb, int level)
 {
-        struct ocfs2_lock_res *lockres = opaque;
+        struct ocfs2_lock_res *lockres = ocfs2_lksb_to_lock_res(lksb);
         struct ocfs2_super *osb = ocfs2_get_lockres_osb(lockres);
         int needs_downconvert;
         unsigned long flags;
 
         BUG_ON(level <= DLM_LOCK_NL);
 
-        mlog(0, "BAST fired for lockres %s, blocking %d, level %d type %s\n",
-             lockres->l_name, level, lockres->l_level,
+        mlog(ML_BASTS, "BAST fired for lockres %s, blocking %d, level %d, "
+             "type %s\n", lockres->l_name, level, lockres->l_level,
              ocfs2_lock_type_string(lockres->l_type));
 
         /*
@@ -1072,9 +1080,9 @@ static void ocfs2_blocking_ast(void *opaque, int level)
         ocfs2_wake_downconvert_thread(osb);
 }
 
-static void ocfs2_locking_ast(void *opaque)
+static void ocfs2_locking_ast(struct ocfs2_dlm_lksb *lksb)
 {
-        struct ocfs2_lock_res *lockres = opaque;
+        struct ocfs2_lock_res *lockres = ocfs2_lksb_to_lock_res(lksb);
         struct ocfs2_super *osb = ocfs2_get_lockres_osb(lockres);
         unsigned long flags;
         int status;
@@ -1095,6 +1103,10 @@ static void ocfs2_locking_ast(void *opaque)
                 return;
         }
 
+        mlog(ML_BASTS, "AST fired for lockres %s, action %d, unlock %d, "
+             "level %d => %d\n", lockres->l_name, lockres->l_action,
+             lockres->l_unlock_action, lockres->l_level, lockres->l_requested);
+
         switch(lockres->l_action) {
         case OCFS2_AST_ATTACH:
                 ocfs2_generic_handle_attach_action(lockres);
@@ -1107,8 +1119,8 @@ static void ocfs2_locking_ast(void *opaque)
                 ocfs2_generic_handle_downconvert_action(lockres);
                 break;
         default:
-                mlog(ML_ERROR, "lockres %s: ast fired with invalid action: %u "
-                     "lockres flags = 0x%lx, unlock action: %u\n",
+                mlog(ML_ERROR, "lockres %s: AST fired with invalid action: %u, "
+                     "flags 0x%lx, unlock: %u\n",
                      lockres->l_name, lockres->l_action, lockres->l_flags,
                      lockres->l_unlock_action);
                 BUG();
@@ -1134,6 +1146,88 @@ out:
         spin_unlock_irqrestore(&lockres->l_lock, flags);
 }
 
+static void ocfs2_unlock_ast(struct ocfs2_dlm_lksb *lksb, int error)
+{
+        struct ocfs2_lock_res *lockres = ocfs2_lksb_to_lock_res(lksb);
+        unsigned long flags;
+
+        mlog_entry_void();
+
+        mlog(ML_BASTS, "UNLOCK AST fired for lockres %s, action = %d\n",
+             lockres->l_name, lockres->l_unlock_action);
+
+        spin_lock_irqsave(&lockres->l_lock, flags);
+        if (error) {
+                mlog(ML_ERROR, "Dlm passes error %d for lock %s, "
+                     "unlock_action %d\n", error, lockres->l_name,
+                     lockres->l_unlock_action);
+                spin_unlock_irqrestore(&lockres->l_lock, flags);
+                mlog_exit_void();
+                return;
+        }
+
+        switch(lockres->l_unlock_action) {
+        case OCFS2_UNLOCK_CANCEL_CONVERT:
+                mlog(0, "Cancel convert success for %s\n", lockres->l_name);
+                lockres->l_action = OCFS2_AST_INVALID;
+                /* Downconvert thread may have requeued this lock, we
+                 * need to wake it. */
+                if (lockres->l_flags & OCFS2_LOCK_BLOCKED)
+                        ocfs2_wake_downconvert_thread(ocfs2_get_lockres_osb(lockres));
+                break;
+        case OCFS2_UNLOCK_DROP_LOCK:
+                lockres->l_level = DLM_LOCK_IV;
+                break;
+        default:
+                BUG();
+        }
+
+        lockres_clear_flags(lockres, OCFS2_LOCK_BUSY);
+        lockres->l_unlock_action = OCFS2_UNLOCK_INVALID;
+        wake_up(&lockres->l_event);
+        spin_unlock_irqrestore(&lockres->l_lock, flags);
+
+        mlog_exit_void();
+}
+
+/*
+ * This is the filesystem locking protocol.  It provides the lock handling
+ * hooks for the underlying DLM.  It has a maximum version number.
+ * The version number allows interoperability with systems running at
+ * the same major number and an equal or smaller minor number.
+ *
+ * Whenever the filesystem does new things with locks (adds or removes a
+ * lock, orders them differently, does different things underneath a lock),
+ * the version must be changed.  The protocol is negotiated when joining
+ * the dlm domain.  A node may join the domain if its major version is
+ * identical to all other nodes and its minor version is greater than
+ * or equal to all other nodes.  When its minor version is greater than
+ * the other nodes, it will run at the minor version specified by the
+ * other nodes.
+ *
+ * If a locking change is made that will not be compatible with older
+ * versions, the major number must be increased and the minor version set
+ * to zero.  If a change merely adds a behavior that can be disabled when
+ * speaking to older versions, the minor version must be increased.  If a
+ * change adds a fully backwards compatible change (eg, LVB changes that
+ * are just ignored by older versions), the version does not need to be
+ * updated.
+ */
+static struct ocfs2_locking_protocol lproto = {
+        .lp_max_version = {
+                .pv_major = OCFS2_LOCKING_PROTOCOL_MAJOR,
+                .pv_minor = OCFS2_LOCKING_PROTOCOL_MINOR,
+        },
+        .lp_lock_ast            = ocfs2_locking_ast,
+        .lp_blocking_ast        = ocfs2_blocking_ast,
+        .lp_unlock_ast          = ocfs2_unlock_ast,
+};
+
+void ocfs2_set_locking_protocol(void)
+{
+        ocfs2_stack_glue_set_max_proto_version(&lproto.lp_max_version);
+}
+
 static inline void ocfs2_recover_from_dlm_error(struct ocfs2_lock_res *lockres,
                                                 int convert)
 {
@@ -1189,8 +1283,7 @@ static int ocfs2_lock_create(struct ocfs2_super *osb,
                              &lockres->l_lksb,
                              dlm_flags,
                              lockres->l_name,
-                             OCFS2_LOCK_ID_MAX_LEN - 1,
-                             lockres);
+                             OCFS2_LOCK_ID_MAX_LEN - 1);
         lockres_clear_pending(lockres, gen, osb);
         if (ret) {
                 ocfs2_log_dlm_error("ocfs2_dlm_lock", ret, lockres);
@@ -1412,7 +1505,7 @@ again:
                 BUG_ON(level == DLM_LOCK_IV);
                 BUG_ON(level == DLM_LOCK_NL);
 
-                mlog(0, "lock %s, convert from %d to level = %d\n",
+                mlog(ML_BASTS, "lockres %s, convert from %d to %d\n",
                      lockres->l_name, lockres->l_level, level);
 
                 /* call dlm_lock to upgrade lock now */
@@ -1421,8 +1514,7 @@ again:
                                      &lockres->l_lksb,
                                      lkm_flags,
                                      lockres->l_name,
-                                     OCFS2_LOCK_ID_MAX_LEN - 1,
-                                     lockres);
+                                     OCFS2_LOCK_ID_MAX_LEN - 1);
                 lockres_clear_pending(lockres, gen, osb);
                 if (ret) {
                         if (!(lkm_flags & DLM_LKF_NOQUEUE) ||
@@ -1859,8 +1951,7 @@ int ocfs2_file_lock(struct file *file, int ex, int trylock)
         spin_unlock_irqrestore(&lockres->l_lock, flags);
 
         ret = ocfs2_dlm_lock(osb->cconn, level, &lockres->l_lksb, lkm_flags,
-                             lockres->l_name, OCFS2_LOCK_ID_MAX_LEN - 1,
-                             lockres);
+                             lockres->l_name, OCFS2_LOCK_ID_MAX_LEN - 1);
         if (ret) {
                 if (!trylock || (ret != -EAGAIN)) {
                         ocfs2_log_dlm_error("ocfs2_dlm_lock", ret, lockres);
@@ -2989,7 +3080,7 @@ int ocfs2_dlm_init(struct ocfs2_super *osb)
         status = ocfs2_cluster_connect(osb->osb_cluster_stack,
                                        osb->uuid_str,
                                        strlen(osb->uuid_str),
-                                       ocfs2_do_node_down, osb,
+                                       &lproto, ocfs2_do_node_down, osb,
                                        &conn);
         if (status) {
                 mlog_errno(status);
@@ -3056,50 +3147,6 @@ void ocfs2_dlm_shutdown(struct ocfs2_super *osb,
         mlog_exit_void();
 }
 
-static void ocfs2_unlock_ast(void *opaque, int error)
-{
-        struct ocfs2_lock_res *lockres = opaque;
-        unsigned long flags;
-
-        mlog_entry_void();
-
-        mlog(0, "UNLOCK AST called on lock %s, action = %d\n", lockres->l_name,
-             lockres->l_unlock_action);
-
-        spin_lock_irqsave(&lockres->l_lock, flags);
-        if (error) {
-                mlog(ML_ERROR, "Dlm passes error %d for lock %s, "
-                     "unlock_action %d\n", error, lockres->l_name,
-                     lockres->l_unlock_action);
-                spin_unlock_irqrestore(&lockres->l_lock, flags);
-                mlog_exit_void();
-                return;
-        }
-
-        switch(lockres->l_unlock_action) {
-        case OCFS2_UNLOCK_CANCEL_CONVERT:
-                mlog(0, "Cancel convert success for %s\n", lockres->l_name);
-                lockres->l_action = OCFS2_AST_INVALID;
-                /* Downconvert thread may have requeued this lock, we
-                 * need to wake it. */
-                if (lockres->l_flags & OCFS2_LOCK_BLOCKED)
-                        ocfs2_wake_downconvert_thread(ocfs2_get_lockres_osb(lockres));
-                break;
-        case OCFS2_UNLOCK_DROP_LOCK:
-                lockres->l_level = DLM_LOCK_IV;
-                break;
-        default:
-                BUG();
-        }
-
-        lockres_clear_flags(lockres, OCFS2_LOCK_BUSY);
-        lockres->l_unlock_action = OCFS2_UNLOCK_INVALID;
-        wake_up(&lockres->l_event);
-        spin_unlock_irqrestore(&lockres->l_lock, flags);
-
-        mlog_exit_void();
-}
-
 static int ocfs2_drop_lock(struct ocfs2_super *osb,
                            struct ocfs2_lock_res *lockres)
 {
@@ -3167,8 +3214,7 @@ static int ocfs2_drop_lock(struct ocfs2_super *osb,
 
         mlog(0, "lock %s\n", lockres->l_name);
 
-        ret = ocfs2_dlm_unlock(osb->cconn, &lockres->l_lksb, lkm_flags,
-                               lockres);
+        ret = ocfs2_dlm_unlock(osb->cconn, &lockres->l_lksb, lkm_flags);
         if (ret) {
                 ocfs2_log_dlm_error("ocfs2_dlm_unlock", ret, lockres);
                 mlog(ML_ERROR, "lockres flags: %lu\n", lockres->l_flags);
@@ -3276,13 +3322,20 @@ static unsigned int ocfs2_prepare_downconvert(struct ocfs2_lock_res *lockres,
         BUG_ON(lockres->l_blocking <= DLM_LOCK_NL);
 
         if (lockres->l_level <= new_level) {
-                mlog(ML_ERROR, "lockres->l_level (%d) <= new_level (%d)\n",
-                     lockres->l_level, new_level);
+                mlog(ML_ERROR, "lockres %s, lvl %d <= %d, blcklst %d, mask %d, "
+                     "type %d, flags 0x%lx, hold %d %d, act %d %d, req %d, "
+                     "block %d, pgen %d\n", lockres->l_name, lockres->l_level,
+                     new_level, list_empty(&lockres->l_blocked_list),
+                     list_empty(&lockres->l_mask_waiters), lockres->l_type,
+                     lockres->l_flags, lockres->l_ro_holders,
+                     lockres->l_ex_holders, lockres->l_action,
+                     lockres->l_unlock_action, lockres->l_requested,
+                     lockres->l_blocking, lockres->l_pending_gen);
                 BUG();
         }
 
-        mlog(0, "lock %s, new_level = %d, l_blocking = %d\n",
-             lockres->l_name, new_level, lockres->l_blocking);
+        mlog(ML_BASTS, "lockres %s, level %d => %d, blocking %d\n",
+             lockres->l_name, lockres->l_level, new_level, lockres->l_blocking);
 
         lockres->l_action = OCFS2_AST_DOWNCONVERT;
         lockres->l_requested = new_level;
@@ -3301,6 +3354,9 @@ static int ocfs2_downconvert_lock(struct ocfs2_super *osb,
 
         mlog_entry_void();
 
+        mlog(ML_BASTS, "lockres %s, level %d => %d\n", lockres->l_name,
+             lockres->l_level, new_level);
+
         if (lvb)
                 dlm_flags |= DLM_LKF_VALBLK;
 
@@ -3309,8 +3365,7 @@ static int ocfs2_downconvert_lock(struct ocfs2_super *osb,
                              &lockres->l_lksb,
                              dlm_flags,
                              lockres->l_name,
-                             OCFS2_LOCK_ID_MAX_LEN - 1,
-                             lockres);
+                             OCFS2_LOCK_ID_MAX_LEN - 1);
         lockres_clear_pending(lockres, generation, osb);
         if (ret) {
                 ocfs2_log_dlm_error("ocfs2_dlm_lock", ret, lockres);
@@ -3331,14 +3386,12 @@ static int ocfs2_prepare_cancel_convert(struct ocfs2_super *osb,
         assert_spin_locked(&lockres->l_lock);
 
         mlog_entry_void();
-        mlog(0, "lock %s\n", lockres->l_name);
 
         if (lockres->l_unlock_action == OCFS2_UNLOCK_CANCEL_CONVERT) {
                 /* If we're already trying to cancel a lock conversion
                  * then just drop the spinlock and allow the caller to
                  * requeue this lock. */
-
-                mlog(0, "Lockres %s, skip convert\n", lockres->l_name);
+                mlog(ML_BASTS, "lockres %s, skip convert\n", lockres->l_name);
                 return 0;
         }
 
@@ -3353,6 +3406,8 @@ static int ocfs2_prepare_cancel_convert(struct ocfs2_super *osb,
                         "lock %s, invalid flags: 0x%lx\n",
                         lockres->l_name, lockres->l_flags);
 
+        mlog(ML_BASTS, "lockres %s\n", lockres->l_name);
+
         return 1;
 }
 
@@ -3362,16 +3417,15 @@ static int ocfs2_cancel_convert(struct ocfs2_super *osb,
         int ret;
 
         mlog_entry_void();
-        mlog(0, "lock %s\n", lockres->l_name);
 
         ret = ocfs2_dlm_unlock(osb->cconn, &lockres->l_lksb,
-                               DLM_LKF_CANCEL, lockres);
+                               DLM_LKF_CANCEL);
         if (ret) {
                 ocfs2_log_dlm_error("ocfs2_dlm_unlock", ret, lockres);
                 ocfs2_recover_from_dlm_error(lockres, 0);
         }
 
-        mlog(0, "lock %s return from ocfs2_dlm_unlock\n", lockres->l_name);
+        mlog(ML_BASTS, "lockres %s\n", lockres->l_name);
 
         mlog_exit(ret);
         return ret;
@@ -3428,8 +3482,11 @@ recheck:
                  * at the same time they set OCFS2_DLM_BUSY.  They must
                  * clear OCFS2_DLM_PENDING after dlm_lock() returns.
                  */
-                if (lockres->l_flags & OCFS2_LOCK_PENDING)
+                if (lockres->l_flags & OCFS2_LOCK_PENDING) {
+                        mlog(ML_BASTS, "lockres %s, ReQ: Pending\n",
+                             lockres->l_name);
                         goto leave_requeue;
+                }
 
                 ctl->requeue = 1;
                 ret = ocfs2_prepare_cancel_convert(osb, lockres);
@@ -3461,6 +3518,7 @@ recheck:
          */
         if (lockres->l_level == DLM_LOCK_NL) {
                 BUG_ON(lockres->l_ex_holders || lockres->l_ro_holders);
+                mlog(ML_BASTS, "lockres %s, Aborting dc\n", lockres->l_name);
                 lockres->l_blocking = DLM_LOCK_NL;
                 lockres_clear_flags(lockres, OCFS2_LOCK_BLOCKED);
                 spin_unlock_irqrestore(&lockres->l_lock, flags);
@@ -3470,28 +3528,41 @@ recheck:
         /* if we're blocking an exclusive and we have *any* holders,
          * then requeue. */
         if ((lockres->l_blocking == DLM_LOCK_EX)
-            && (lockres->l_ex_holders || lockres->l_ro_holders))
+            && (lockres->l_ex_holders || lockres->l_ro_holders)) {
+                mlog(ML_BASTS, "lockres %s, ReQ: EX/PR Holders %u,%u\n",
+                     lockres->l_name, lockres->l_ex_holders,
+                     lockres->l_ro_holders);
                 goto leave_requeue;
+        }
 
         /* If it's a PR we're blocking, then only
          * requeue if we've got any EX holders */
         if (lockres->l_blocking == DLM_LOCK_PR &&
-            lockres->l_ex_holders)
+            lockres->l_ex_holders) {
+                mlog(ML_BASTS, "lockres %s, ReQ: EX Holders %u\n",
+                     lockres->l_name, lockres->l_ex_holders);
                 goto leave_requeue;
+        }
 
         /*
          * Can we get a lock in this state if the holder counts are
          * zero? The meta data unblock code used to check this.
          */
         if ((lockres->l_ops->flags & LOCK_TYPE_REQUIRES_REFRESH)
-            && (lockres->l_flags & OCFS2_LOCK_REFRESHING))
+            && (lockres->l_flags & OCFS2_LOCK_REFRESHING)) {
+                mlog(ML_BASTS, "lockres %s, ReQ: Lock Refreshing\n",
+                     lockres->l_name);
                 goto leave_requeue;
+        }
 
         new_level = ocfs2_highest_compat_lock_level(lockres->l_blocking);
 
         if (lockres->l_ops->check_downconvert
-            && !lockres->l_ops->check_downconvert(lockres, new_level))
+            && !lockres->l_ops->check_downconvert(lockres, new_level)) {
+                mlog(ML_BASTS, "lockres %s, ReQ: Checkpointing\n",
+                     lockres->l_name);
                 goto leave_requeue;
+        }
 
         /* If we get here, then we know that there are no more
          * incompatible holders (and anyone asking for an incompatible
@@ -3509,13 +3580,19 @@ recheck:
 
         ctl->unblock_action = lockres->l_ops->downconvert_worker(lockres, blocking);
 
-        if (ctl->unblock_action == UNBLOCK_STOP_POST)
+        if (ctl->unblock_action == UNBLOCK_STOP_POST) {
+                mlog(ML_BASTS, "lockres %s, UNBLOCK_STOP_POST\n",
+                     lockres->l_name);
                 goto leave;
+        }
 
         spin_lock_irqsave(&lockres->l_lock, flags);
         if ((blocking != lockres->l_blocking) || (level != lockres->l_level)) {
                 /* If this changed underneath us, then we can't drop
                  * it just yet. */
+                mlog(ML_BASTS, "lockres %s, block=%d:%d, level=%d:%d, "
+                     "Recheck\n", lockres->l_name, blocking,
+                     lockres->l_blocking, level, lockres->l_level);
                 goto recheck;
         }
 
@@ -3910,45 +3987,6 @@ void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex)
                 ocfs2_cluster_unlock(osb, lockres, level);
 }
 
-/*
- * This is the filesystem locking protocol.  It provides the lock handling
- * hooks for the underlying DLM.  It has a maximum version number.
- * The version number allows interoperability with systems running at
- * the same major number and an equal or smaller minor number.
- *
- * Whenever the filesystem does new things with locks (adds or removes a
- * lock, orders them differently, does different things underneath a lock),
- * the version must be changed.  The protocol is negotiated when joining
- * the dlm domain.  A node may join the domain if its major version is
- * identical to all other nodes and its minor version is greater than
- * or equal to all other nodes.  When its minor version is greater than
- * the other nodes, it will run at the minor version specified by the
- * other nodes.
- *
- * If a locking change is made that will not be compatible with older
- * versions, the major number must be increased and the minor version set
- * to zero.  If a change merely adds a behavior that can be disabled when
- * speaking to older versions, the minor version must be increased.  If a
- * change adds a fully backwards compatible change (eg, LVB changes that
- * are just ignored by older versions), the version does not need to be
- * updated.
- */
-static struct ocfs2_locking_protocol lproto = {
-        .lp_max_version = {
-                .pv_major = OCFS2_LOCKING_PROTOCOL_MAJOR,
-                .pv_minor = OCFS2_LOCKING_PROTOCOL_MINOR,
-        },
-        .lp_lock_ast            = ocfs2_locking_ast,
-        .lp_blocking_ast        = ocfs2_blocking_ast,
-        .lp_unlock_ast          = ocfs2_unlock_ast,
-};
-
-void ocfs2_set_locking_protocol(void)
-{
-        ocfs2_stack_glue_set_locking_protocol(&lproto);
-}
-
-
 static void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
                                        struct ocfs2_lock_res *lockres)
 {
@@ -3965,7 +4003,7 @@ static void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
         BUG_ON(!lockres);
         BUG_ON(!lockres->l_ops);
 
-        mlog(0, "lockres %s blocked.\n", lockres->l_name);
+        mlog(ML_BASTS, "lockres %s blocked\n", lockres->l_name);
 
         /* Detect whether a lock has been marked as going away while
          * the downconvert thread was processing other things. A lock can
@@ -3988,7 +4026,7 @@ unqueue:
         } else
                 ocfs2_schedule_blocked_lock(osb, lockres);
 
-        mlog(0, "lockres %s, requeue = %s.\n", lockres->l_name,
+        mlog(ML_BASTS, "lockres %s, requeue = %s.\n", lockres->l_name,
              ctl.requeue ? "yes" : "no");
         spin_unlock_irqrestore(&lockres->l_lock, flags);
 
@@ -4010,7 +4048,7 @@ static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb,
                 /* Do not schedule a lock for downconvert when it's on
                  * the way to destruction - any nodes wanting access
                  * to the resource will get it soon. */
-                mlog(0, "Lockres %s won't be scheduled: flags 0x%lx\n",
+                mlog(ML_BASTS, "lockres %s won't be scheduled: flags 0x%lx\n",
                      lockres->l_name, lockres->l_flags);
                 return;
         }
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 558ce0312421..5b52547d6299 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -993,10 +993,9 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
         }
 
         if (size_change && attr->ia_size != i_size_read(inode)) {
-                if (attr->ia_size > sb->s_maxbytes) {
-                        status = -EFBIG;
+                status = inode_newsize_ok(inode, attr->ia_size);
+                if (status)
                         goto bail_unlock;
-                }
 
                 if (i_size_read(inode) > attr->ia_size) {
                         if (ocfs2_should_order_data(inode)) {
@@ -1836,6 +1835,8 @@ static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
                                                                &meta_level);
                         if (has_refcount)
                                 *has_refcount = 1;
+                        if (direct_io)
+                                *direct_io = 0;
                 }
 
                 if (ret < 0) {
@@ -1859,10 +1860,6 @@ static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
                         break;
                 }
 
-                if (has_refcount && *has_refcount == 1) {
-                        *direct_io = 0;
-                        break;
-                }
                 /*
                  * Allowing concurrent direct writes means
                  * i_size changes wouldn't be synchronized, so
@@ -2043,7 +2040,7 @@ out_dio:
          * async dio is going to do it in the future or an end_io after an
          * error has already done it.
          */
-        if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
+        if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) {
                 rw_level = -1;
                 have_alloc_sem = 0;
         }
diff --git a/fs/ocfs2/ioctl.h b/fs/ocfs2/ioctl.h
index cf9a5ee30fef..0cd5323bd3f0 100644
--- a/fs/ocfs2/ioctl.h
+++ b/fs/ocfs2/ioctl.h
@@ -7,10 +7,10 @@
  *
  */
 
-#ifndef OCFS2_IOCTL_H
-#define OCFS2_IOCTL_H
+#ifndef OCFS2_IOCTL_PROTO_H
+#define OCFS2_IOCTL_PROTO_H
 
 long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
 long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 
-#endif /* OCFS2_IOCTL_H */
+#endif /* OCFS2_IOCTL_PROTO_H */
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index ac10f83edb95..ca992d91f511 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -476,7 +476,7 @@ out_mutex:
 
 out:
         if (!status)
-                ocfs2_init_inode_steal_slot(osb);
+                ocfs2_init_steal_slots(osb);
         mlog_exit(status);
         return status;
 }
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 740f448041e2..1238b491db90 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -42,6 +42,7 @@
 
 #include "ocfs2_fs.h"
 #include "ocfs2_lockid.h"
+#include "ocfs2_ioctl.h"
 
 /* For struct ocfs2_blockcheck_stats */
 #include "blockcheck.h"
@@ -159,7 +160,7 @@ struct ocfs2_lock_res {
         int                      l_level;
         unsigned int             l_ro_holders;
         unsigned int             l_ex_holders;
-        union ocfs2_dlm_lksb     l_lksb;
+        struct ocfs2_dlm_lksb    l_lksb;
 
         /* used from AST/BAST funcs. */
         enum ocfs2_ast_action    l_action;
@@ -305,7 +306,9 @@ struct ocfs2_super
         u32 s_next_generation;
         unsigned long osb_flags;
         s16 s_inode_steal_slot;
+        s16 s_meta_steal_slot;
         atomic_t s_num_inodes_stolen;
+        atomic_t s_num_meta_stolen;
 
         unsigned long s_mount_opt;
         unsigned int s_atime_quantum;
@@ -760,33 +763,6 @@ static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
         return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
 }
 
-static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb)
-{
-        spin_lock(&osb->osb_lock);
-        osb->s_inode_steal_slot = OCFS2_INVALID_SLOT;
-        spin_unlock(&osb->osb_lock);
-        atomic_set(&osb->s_num_inodes_stolen, 0);
-}
-
-static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb,
-                                              s16 slot)
-{
-        spin_lock(&osb->osb_lock);
-        osb->s_inode_steal_slot = slot;
-        spin_unlock(&osb->osb_lock);
-}
-
-static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb)
-{
-        s16 slot;
-
-        spin_lock(&osb->osb_lock);
-        slot = osb->s_inode_steal_slot;
-        spin_unlock(&osb->osb_lock);
-
-        return slot;
-}
-
 #define ocfs2_set_bit ext2_set_bit
 #define ocfs2_clear_bit ext2_clear_bit
 #define ocfs2_test_bit ext2_test_bit
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 7638a38c32bc..bb37218a7978 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -254,63 +254,6 @@
                                                  * refcount tree */
 
 /*
- * ioctl commands
- */
-#define OCFS2_IOC_GETFLAGS      _IOR('f', 1, long)
-#define OCFS2_IOC_SETFLAGS      _IOW('f', 2, long)
-#define OCFS2_IOC32_GETFLAGS    _IOR('f', 1, int)
-#define OCFS2_IOC32_SETFLAGS    _IOW('f', 2, int)
-
-/*
- * Space reservation / allocation / free ioctls and argument structure
- * are designed to be compatible with XFS.
- *
- * ALLOCSP* and FREESP* are not and will never be supported, but are
- * included here for completeness.
- */
-struct ocfs2_space_resv {
-        __s16           l_type;
-        __s16           l_whence;
-        __s64           l_start;
-        __s64           l_len;          /* len == 0 means until end of file */
-        __s32           l_sysid;
-        __u32           l_pid;
-        __s32           l_pad[4];       /* reserve area                     */
-};
-
-#define OCFS2_IOC_ALLOCSP               _IOW ('X', 10, struct ocfs2_space_resv)
-#define OCFS2_IOC_FREESP                _IOW ('X', 11, struct ocfs2_space_resv)
-#define OCFS2_IOC_RESVSP                _IOW ('X', 40, struct ocfs2_space_resv)
-#define OCFS2_IOC_UNRESVSP      _IOW ('X', 41, struct ocfs2_space_resv)
-#define OCFS2_IOC_ALLOCSP64     _IOW ('X', 36, struct ocfs2_space_resv)
-#define OCFS2_IOC_FREESP64      _IOW ('X', 37, struct ocfs2_space_resv)
-#define OCFS2_IOC_RESVSP64      _IOW ('X', 42, struct ocfs2_space_resv)
-#define OCFS2_IOC_UNRESVSP64    _IOW ('X', 43, struct ocfs2_space_resv)
-
-/* Used to pass group descriptor data when online resize is done */
-struct ocfs2_new_group_input {
-        __u64 group;            /* Group descriptor's blkno. */
-        __u32 clusters;         /* Total number of clusters in this group */
-        __u32 frees;            /* Total free clusters in this group */
-        __u16 chain;            /* Chain for this group */
-        __u16 reserved1;
-        __u32 reserved2;
-};
-
-#define OCFS2_IOC_GROUP_EXTEND  _IOW('o', 1, int)
-#define OCFS2_IOC_GROUP_ADD     _IOW('o', 2,struct ocfs2_new_group_input)
-#define OCFS2_IOC_GROUP_ADD64   _IOW('o', 3,struct ocfs2_new_group_input)
-
-/* Used to pass 2 file names to reflink. */
-struct reflink_arguments {
-        __u64 old_path;
-        __u64 new_path;
-        __u64 preserve;
-};
-#define OCFS2_IOC_REFLINK       _IOW('o', 4, struct reflink_arguments)
-
-
-/*
  * Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
  */
 #define OCFS2_JOURNAL_DIRTY_FL  (0x00000001)    /* Journal needs recovery */
diff --git a/fs/ocfs2/ocfs2_ioctl.h b/fs/ocfs2/ocfs2_ioctl.h
new file mode 100644
index 000000000000..2d3420af1a83
--- /dev/null
+++ b/fs/ocfs2/ocfs2_ioctl.h
@@ -0,0 +1,79 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * ocfs2_ioctl.h
+ *
+ * Defines OCFS2 ioctls.
+ *
+ * Copyright (C) 2010 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License, version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef OCFS2_IOCTL_H
+#define OCFS2_IOCTL_H
+
+/*
+ * ioctl commands
+ */
+#define OCFS2_IOC_GETFLAGS      _IOR('f', 1, long)
+#define OCFS2_IOC_SETFLAGS      _IOW('f', 2, long)
+#define OCFS2_IOC32_GETFLAGS    _IOR('f', 1, int)
+#define OCFS2_IOC32_SETFLAGS    _IOW('f', 2, int)
+
+/*
+ * Space reservation / allocation / free ioctls and argument structure
+ * are designed to be compatible with XFS.
+ *
+ * ALLOCSP* and FREESP* are not and will never be supported, but are
+ * included here for completeness.
+ */
+struct ocfs2_space_resv {
+        __s16           l_type;
+        __s16           l_whence;
+        __s64           l_start;
+        __s64           l_len;          /* len == 0 means until end of file */
+        __s32           l_sysid;
+        __u32           l_pid;
+        __s32           l_pad[4];       /* reserve area                     */
+};
+
+#define OCFS2_IOC_ALLOCSP               _IOW ('X', 10, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP                _IOW ('X', 11, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP                _IOW ('X', 40, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP      _IOW ('X', 41, struct ocfs2_space_resv)
+#define OCFS2_IOC_ALLOCSP64     _IOW ('X', 36, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP64      _IOW ('X', 37, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP64      _IOW ('X', 42, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP64    _IOW ('X', 43, struct ocfs2_space_resv)
+
+/* Used to pass group descriptor data when online resize is done */
+struct ocfs2_new_group_input {
+        __u64 group;            /* Group descriptor's blkno. */
+        __u32 clusters;         /* Total number of clusters in this group */
+        __u32 frees;            /* Total free clusters in this group */
+        __u16 chain;            /* Chain for this group */
+        __u16 reserved1;
+        __u32 reserved2;
+};
+
+#define OCFS2_IOC_GROUP_EXTEND  _IOW('o', 1, int)
+#define OCFS2_IOC_GROUP_ADD     _IOW('o', 2,struct ocfs2_new_group_input)
+#define OCFS2_IOC_GROUP_ADD64   _IOW('o', 3,struct ocfs2_new_group_input)
+
+/* Used to pass 2 file names to reflink. */
+struct reflink_arguments {
+        __u64 old_path;
+        __u64 new_path;
+        __u64 preserve;
+};
+#define OCFS2_IOC_REFLINK       _IOW('o', 4, struct reflink_arguments)
+
+#endif /* OCFS2_IOCTL_H */
diff --git a/fs/ocfs2/ocfs2_lockingver.h b/fs/ocfs2/ocfs2_lockingver.h
index 82d5eeac0fff..2e45c8d2ea7e 100644
--- a/fs/ocfs2/ocfs2_lockingver.h
+++ b/fs/ocfs2/ocfs2_lockingver.h
@@ -23,6 +23,8 @@
 /*
  * The protocol version for ocfs2 cluster locking.  See dlmglue.c for
  * more details.
+ *
+ * 1.0 - Initial locking version from ocfs2 1.4.
  */
 #define OCFS2_LOCKING_PROTOCOL_MAJOR 1
 #define OCFS2_LOCKING_PROTOCOL_MINOR 0
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 8ae65c9c020c..fb6aa7acf54b 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -626,7 +626,7 @@ static int ocfs2_create_refcount_tree(struct inode *inode,
         rb = (struct ocfs2_refcount_block *)new_bh->b_data;
         memset(rb, 0, inode->i_sb->s_blocksize);
         strcpy((void *)rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE);
-        rb->rf_suballoc_slot = cpu_to_le16(osb->slot_num);
+        rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
         rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start);
         rb->rf_fs_generation = cpu_to_le32(osb->fs_generation);
         rb->rf_blkno = cpu_to_le64(first_blkno);
@@ -1330,7 +1330,7 @@ static int ocfs2_expand_inline_ref_root(handle_t *handle,
         memcpy(new_bh->b_data, ref_root_bh->b_data, sb->s_blocksize);
 
         new_rb = (struct ocfs2_refcount_block *)new_bh->b_data;
-        new_rb->rf_suballoc_slot = cpu_to_le16(OCFS2_SB(sb)->slot_num);
+        new_rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
         new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start);
         new_rb->rf_blkno = cpu_to_le64(blkno);
         new_rb->rf_cpos = cpu_to_le32(0);
@@ -1576,7 +1576,7 @@ static int ocfs2_new_leaf_refcount_block(handle_t *handle,
         new_rb = (struct ocfs2_refcount_block *)new_bh->b_data;
         memset(new_rb, 0, sb->s_blocksize);
         strcpy((void *)new_rb, OCFS2_REFCOUNT_BLOCK_SIGNATURE);
-        new_rb->rf_suballoc_slot = cpu_to_le16(OCFS2_SB(sb)->slot_num);
+        new_rb->rf_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
         new_rb->rf_suballoc_bit = cpu_to_le16(suballoc_bit_start);
         new_rb->rf_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation);
         new_rb->rf_blkno = cpu_to_le64(blkno);
diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index 3038c92af493..7020e1253ffa 100644
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -161,24 +161,23 @@ static int dlm_status_to_errno(enum dlm_status status)
 
 static void o2dlm_lock_ast_wrapper(void *astarg)
 {
-        BUG_ON(o2cb_stack.sp_proto == NULL);
+        struct ocfs2_dlm_lksb *lksb = astarg;
 
-        o2cb_stack.sp_proto->lp_lock_ast(astarg);
+        lksb->lksb_conn->cc_proto->lp_lock_ast(lksb);
 }
 
 static void o2dlm_blocking_ast_wrapper(void *astarg, int level)
 {
-        BUG_ON(o2cb_stack.sp_proto == NULL);
+        struct ocfs2_dlm_lksb *lksb = astarg;
 
-        o2cb_stack.sp_proto->lp_blocking_ast(astarg, level);
+        lksb->lksb_conn->cc_proto->lp_blocking_ast(lksb, level);
 }
 
 static void o2dlm_unlock_ast_wrapper(void *astarg, enum dlm_status status)
 {
+        struct ocfs2_dlm_lksb *lksb = astarg;
         int error = dlm_status_to_errno(status);
 
-        BUG_ON(o2cb_stack.sp_proto == NULL);
-
         /*
          * In o2dlm, you can get both the lock_ast() for the lock being
          * granted and the unlock_ast() for the CANCEL failing.  A
@@ -193,16 +192,15 @@ static void o2dlm_unlock_ast_wrapper(void *astarg, enum dlm_status status)
         if (status == DLM_CANCELGRANT)
                 return;
 
-        o2cb_stack.sp_proto->lp_unlock_ast(astarg, error);
+        lksb->lksb_conn->cc_proto->lp_unlock_ast(lksb, error);
 }
 
 static int o2cb_dlm_lock(struct ocfs2_cluster_connection *conn,
                          int mode,
-                         union ocfs2_dlm_lksb *lksb,
+                         struct ocfs2_dlm_lksb *lksb,
                          u32 flags,
                          void *name,
-                         unsigned int namelen,
-                         void *astarg)
+                         unsigned int namelen)
 {
         enum dlm_status status;
         int o2dlm_mode = mode_to_o2dlm(mode);
@@ -211,28 +209,27 @@ static int o2cb_dlm_lock(struct ocfs2_cluster_connection *conn,
 
         status = dlmlock(conn->cc_lockspace, o2dlm_mode, &lksb->lksb_o2dlm,
                          o2dlm_flags, name, namelen,
-                         o2dlm_lock_ast_wrapper, astarg,
+                         o2dlm_lock_ast_wrapper, lksb,
                          o2dlm_blocking_ast_wrapper);
         ret = dlm_status_to_errno(status);
         return ret;
 }
 
 static int o2cb_dlm_unlock(struct ocfs2_cluster_connection *conn,
-                           union ocfs2_dlm_lksb *lksb,
-                           u32 flags,
-                           void *astarg)
+                           struct ocfs2_dlm_lksb *lksb,
+                           u32 flags)
 {
         enum dlm_status status;
         int o2dlm_flags = flags_to_o2dlm(flags);
         int ret;
 
         status = dlmunlock(conn->cc_lockspace, &lksb->lksb_o2dlm,
-                           o2dlm_flags, o2dlm_unlock_ast_wrapper, astarg);
+                           o2dlm_flags, o2dlm_unlock_ast_wrapper, lksb);
         ret = dlm_status_to_errno(status);
         return ret;
 }
 
-static int o2cb_dlm_lock_status(union ocfs2_dlm_lksb *lksb)
+static int o2cb_dlm_lock_status(struct ocfs2_dlm_lksb *lksb)
 {
         return dlm_status_to_errno(lksb->lksb_o2dlm.status);
 }
@@ -242,17 +239,17 @@ static int o2cb_dlm_lock_status(union ocfs2_dlm_lksb *lksb)
  * contents, it will zero out the LVB.  Thus the caller can always trust
  * the contents.
  */
-static int o2cb_dlm_lvb_valid(union ocfs2_dlm_lksb *lksb)
+static int o2cb_dlm_lvb_valid(struct ocfs2_dlm_lksb *lksb)
 {
         return 1;
 }
 
-static void *o2cb_dlm_lvb(union ocfs2_dlm_lksb *lksb)
+static void *o2cb_dlm_lvb(struct ocfs2_dlm_lksb *lksb)
 {
         return (void *)(lksb->lksb_o2dlm.lvb);
 }
 
-static void o2cb_dump_lksb(union ocfs2_dlm_lksb *lksb)
+static void o2cb_dump_lksb(struct ocfs2_dlm_lksb *lksb)
 {
         dlm_print_one_lock(lksb->lksb_o2dlm.lockid);
 }
@@ -280,7 +277,7 @@ static int o2cb_cluster_connect(struct ocfs2_cluster_connection *conn)
         struct dlm_protocol_version fs_version;
 
         BUG_ON(conn == NULL);
-        BUG_ON(o2cb_stack.sp_proto == NULL);
+        BUG_ON(conn->cc_proto == NULL);
 
         /* for now we only have one cluster/node, make sure we see it
          * in the heartbeat universe */
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
index da78a2a334fd..5ae8812b2864 100644
--- a/fs/ocfs2/stack_user.c
+++ b/fs/ocfs2/stack_user.c
@@ -25,7 +25,6 @@
 #include <linux/reboot.h>
 #include <asm/uaccess.h>
 
-#include "ocfs2.h"  /* For struct ocfs2_lock_res */
 #include "stackglue.h"
 
 #include <linux/dlm_plock.h>
@@ -63,8 +62,8 @@
  * negotiated by the client.  The client negotiates based on the maximum
  * version advertised in /sys/fs/ocfs2/max_locking_protocol.  The major
  * number from the "SETV" message must match
- * ocfs2_user_plugin.sp_proto->lp_max_version.pv_major, and the minor number
- * must be less than or equal to ...->lp_max_version.pv_minor.
+ * ocfs2_user_plugin.sp_max_proto.pv_major, and the minor number
+ * must be less than or equal to ...sp_max_version.pv_minor.
  *
  * Once this information has been set, mounts will be allowed.  From this
  * point on, the "DOWN" message can be sent for node down notification.
@@ -401,7 +400,7 @@ static int ocfs2_control_do_setversion_msg(struct file *file,
         char *ptr = NULL;
         struct ocfs2_control_private *p = file->private_data;
         struct ocfs2_protocol_version *max =
-                &ocfs2_user_plugin.sp_proto->lp_max_version;
+                &ocfs2_user_plugin.sp_max_proto;
 
         if (ocfs2_control_get_handshake_state(file) !=
             OCFS2_CONTROL_HANDSHAKE_PROTOCOL)
@@ -664,18 +663,10 @@ static void ocfs2_control_exit(void)
                        -rc);
 }
 
-static struct dlm_lksb *fsdlm_astarg_to_lksb(void *astarg)
-{
-        struct ocfs2_lock_res *res = astarg;
-        return &res->l_lksb.lksb_fsdlm;
-}
-
 static void fsdlm_lock_ast_wrapper(void *astarg)
 {
-        struct dlm_lksb *lksb = fsdlm_astarg_to_lksb(astarg);
-        int status = lksb->sb_status;
-
-        BUG_ON(ocfs2_user_plugin.sp_proto == NULL);
+        struct ocfs2_dlm_lksb *lksb = astarg;
+        int status = lksb->lksb_fsdlm.sb_status;
 
         /*
          * For now we're punting on the issue of other non-standard errors
@@ -688,25 +679,24 @@ static void fsdlm_lock_ast_wrapper(void *astarg)
          */
 
         if (status == -DLM_EUNLOCK || status == -DLM_ECANCEL)
-                ocfs2_user_plugin.sp_proto->lp_unlock_ast(astarg, 0);
+                lksb->lksb_conn->cc_proto->lp_unlock_ast(lksb, 0);
         else
-                ocfs2_user_plugin.sp_proto->lp_lock_ast(astarg);
+                lksb->lksb_conn->cc_proto->lp_lock_ast(lksb);
 }
 
 static void fsdlm_blocking_ast_wrapper(void *astarg, int level)
 {
-        BUG_ON(ocfs2_user_plugin.sp_proto == NULL);
+        struct ocfs2_dlm_lksb *lksb = astarg;
 
-        ocfs2_user_plugin.sp_proto->lp_blocking_ast(astarg, level);
+        lksb->lksb_conn->cc_proto->lp_blocking_ast(lksb, level);
 }
 
 static int user_dlm_lock(struct ocfs2_cluster_connection *conn,
                          int mode,
-                         union ocfs2_dlm_lksb *lksb,
+                         struct ocfs2_dlm_lksb *lksb,
                          u32 flags,
                          void *name,
-                         unsigned int namelen,
-                         void *astarg)
+                         unsigned int namelen)
 {
         int ret;
 
@@ -716,36 +706,35 @@ static int user_dlm_lock(struct ocfs2_cluster_connection *conn,
 
         ret = dlm_lock(conn->cc_lockspace, mode, &lksb->lksb_fsdlm,
                        flags|DLM_LKF_NODLCKWT, name, namelen, 0,
-                       fsdlm_lock_ast_wrapper, astarg,
+                       fsdlm_lock_ast_wrapper, lksb,
                        fsdlm_blocking_ast_wrapper);
         return ret;
 }
 
 static int user_dlm_unlock(struct ocfs2_cluster_connection *conn,
-                           union ocfs2_dlm_lksb *lksb,
-                           u32 flags,
-                           void *astarg)
+                           struct ocfs2_dlm_lksb *lksb,
+                           u32 flags)
 {
         int ret;
 
         ret = dlm_unlock(conn->cc_lockspace, lksb->lksb_fsdlm.sb_lkid,
-                         flags, &lksb->lksb_fsdlm, astarg);
+                         flags, &lksb->lksb_fsdlm, lksb);
         return ret;
 }
 
-static int user_dlm_lock_status(union ocfs2_dlm_lksb *lksb)
+static int user_dlm_lock_status(struct ocfs2_dlm_lksb *lksb)
 {
         return lksb->lksb_fsdlm.sb_status;
 }
 
-static int user_dlm_lvb_valid(union ocfs2_dlm_lksb *lksb)
+static int user_dlm_lvb_valid(struct ocfs2_dlm_lksb *lksb)
 {
         int invalid = lksb->lksb_fsdlm.sb_flags & DLM_SBF_VALNOTVALID;
 
         return !invalid;
 }
 
-static void *user_dlm_lvb(union ocfs2_dlm_lksb *lksb)
+static void *user_dlm_lvb(struct ocfs2_dlm_lksb *lksb)
 {
         if (!lksb->lksb_fsdlm.sb_lvbptr)
                 lksb->lksb_fsdlm.sb_lvbptr = (char *)lksb +
@@ -753,7 +742,7 @@ static void *user_dlm_lvb(union ocfs2_dlm_lksb *lksb)
         return (void *)(lksb->lksb_fsdlm.sb_lvbptr);
 }
 
-static void user_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb)
+static void user_dlm_dump_lksb(struct ocfs2_dlm_lksb *lksb)
 {
 }
 
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index f3df0baa9a48..39abf89697ed 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -36,7 +36,7 @@
 #define OCFS2_STACK_PLUGIN_USER         "user"
 #define OCFS2_MAX_HB_CTL_PATH           256
 
-static struct ocfs2_locking_protocol *lproto;
+static struct ocfs2_protocol_version locking_max_version;
 static DEFINE_SPINLOCK(ocfs2_stack_lock);
 static LIST_HEAD(ocfs2_stack_list);
 static char cluster_stack_name[OCFS2_STACK_LABEL_LEN + 1];
@@ -176,7 +176,7 @@ int ocfs2_stack_glue_register(struct ocfs2_stack_plugin *plugin)
         spin_lock(&ocfs2_stack_lock);
         if (!ocfs2_stack_lookup(plugin->sp_name)) {
                 plugin->sp_count = 0;
-                plugin->sp_proto = lproto;
+                plugin->sp_max_proto = locking_max_version;
                 list_add(&plugin->sp_list, &ocfs2_stack_list);
                 printk(KERN_INFO "ocfs2: Registered cluster interface %s\n",
                        plugin->sp_name);
@@ -213,77 +213,76 @@ void ocfs2_stack_glue_unregister(struct ocfs2_stack_plugin *plugin)
 }
 EXPORT_SYMBOL_GPL(ocfs2_stack_glue_unregister);
 
-void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto)
+void ocfs2_stack_glue_set_max_proto_version(struct ocfs2_protocol_version *max_proto)
 {
         struct ocfs2_stack_plugin *p;
 
-        BUG_ON(proto == NULL);
-
         spin_lock(&ocfs2_stack_lock);
-        BUG_ON(active_stack != NULL);
+        if (memcmp(max_proto, &locking_max_version,
+                   sizeof(struct ocfs2_protocol_version))) {
+                BUG_ON(locking_max_version.pv_major != 0);
 
-        lproto = proto;
-        list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
-                p->sp_proto = lproto;
+                locking_max_version = *max_proto;
+                list_for_each_entry(p, &ocfs2_stack_list, sp_list) {
+                        p->sp_max_proto = locking_max_version;
+                }
         }
-
         spin_unlock(&ocfs2_stack_lock);
 }
-EXPORT_SYMBOL_GPL(ocfs2_stack_glue_set_locking_protocol);
+EXPORT_SYMBOL_GPL(ocfs2_stack_glue_set_max_proto_version);
 
 
 /*
- * The ocfs2_dlm_lock() and ocfs2_dlm_unlock() functions take
- * "struct ocfs2_lock_res *astarg" instead of "void *astarg" because the
- * underlying stack plugins need to pilfer the lksb off of the lock_res.
- * If some other structure needs to be passed as an astarg, the plugins
- * will need to be given a different avenue to the lksb.
+ * The ocfs2_dlm_lock() and ocfs2_dlm_unlock() functions take no argument
+ * for the ast and bast functions.  They will pass the lksb to the ast
+ * and bast.  The caller can wrap the lksb with their own structure to
+ * get more information.
  */
 int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
                    int mode,
-                   union ocfs2_dlm_lksb *lksb,
+                   struct ocfs2_dlm_lksb *lksb,
                    u32 flags,
                    void *name,
-                   unsigned int namelen,
-                   struct ocfs2_lock_res *astarg)
+                   unsigned int namelen)
 {
-        BUG_ON(lproto == NULL);
-
+        if (!lksb->lksb_conn)
+                lksb->lksb_conn = conn;
+        else
+                BUG_ON(lksb->lksb_conn != conn);
         return active_stack->sp_ops->dlm_lock(conn, mode, lksb, flags,
-                                              name, namelen, astarg);
+                                              name, namelen);
 }
 EXPORT_SYMBOL_GPL(ocfs2_dlm_lock);
 
 int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
-                     union ocfs2_dlm_lksb *lksb,
-                     u32 flags,
-                     struct ocfs2_lock_res *astarg)
+                     struct ocfs2_dlm_lksb *lksb,
+                     u32 flags)
 {
-        BUG_ON(lproto == NULL);
+        BUG_ON(lksb->lksb_conn == NULL);
 
-        return active_stack->sp_ops->dlm_unlock(conn, lksb, flags, astarg);
+        return active_stack->sp_ops->dlm_unlock(conn, lksb, flags);
 }
 EXPORT_SYMBOL_GPL(ocfs2_dlm_unlock);
 
-int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb)
+int ocfs2_dlm_lock_status(struct ocfs2_dlm_lksb *lksb)
 {
         return active_stack->sp_ops->lock_status(lksb);
 }
 EXPORT_SYMBOL_GPL(ocfs2_dlm_lock_status);
 
-int ocfs2_dlm_lvb_valid(union ocfs2_dlm_lksb *lksb)
+int ocfs2_dlm_lvb_valid(struct ocfs2_dlm_lksb *lksb)
 {
         return active_stack->sp_ops->lvb_valid(lksb);
 }
 EXPORT_SYMBOL_GPL(ocfs2_dlm_lvb_valid);
 
-void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb)
+void *ocfs2_dlm_lvb(struct ocfs2_dlm_lksb *lksb)
 {
         return active_stack->sp_ops->lock_lvb(lksb);
 }
 EXPORT_SYMBOL_GPL(ocfs2_dlm_lvb);
 
-void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb)
+void ocfs2_dlm_dump_lksb(struct ocfs2_dlm_lksb *lksb)
 {
         active_stack->sp_ops->dump_lksb(lksb);
 }
@@ -312,6 +311,7 @@ EXPORT_SYMBOL_GPL(ocfs2_plock);
 int ocfs2_cluster_connect(const char *stack_name,
                           const char *group,
                           int grouplen,
+                          struct ocfs2_locking_protocol *lproto,
                           void (*recovery_handler)(int node_num,
                                                    void *recovery_data),
                           void *recovery_data,
@@ -329,6 +329,12 @@ int ocfs2_cluster_connect(const char *stack_name,
                 goto out;
         }
 
+        if (memcmp(&lproto->lp_max_version, &locking_max_version,
+                   sizeof(struct ocfs2_protocol_version))) {
+                rc = -EINVAL;
+                goto out;
+        }
+
         new_conn = kzalloc(sizeof(struct ocfs2_cluster_connection),
                            GFP_KERNEL);
         if (!new_conn) {
@@ -341,6 +347,7 @@ int ocfs2_cluster_connect(const char *stack_name,
         new_conn->cc_recovery_handler = recovery_handler;
         new_conn->cc_recovery_data = recovery_data;
 
+        new_conn->cc_proto = lproto;
         /* Start the new connection at our maximum compatibility level */
         new_conn->cc_version = lproto->lp_max_version;
 
@@ -366,6 +373,24 @@ out:
 }
 EXPORT_SYMBOL_GPL(ocfs2_cluster_connect);
 
+/* The caller will ensure all nodes have the same cluster stack */
+int ocfs2_cluster_connect_agnostic(const char *group,
+                                   int grouplen,
+                                   struct ocfs2_locking_protocol *lproto,
+                                   void (*recovery_handler)(int node_num,
+                                                            void *recovery_data),
+                                   void *recovery_data,
+                                   struct ocfs2_cluster_connection **conn)
+{
+        char *stack_name = NULL;
+
+        if (cluster_stack_name[0])
+                stack_name = cluster_stack_name;
+        return ocfs2_cluster_connect(stack_name, group, grouplen, lproto,
+                                     recovery_handler, recovery_data, conn);
+}
+EXPORT_SYMBOL_GPL(ocfs2_cluster_connect_agnostic);
+
 /* If hangup_pending is 0, the stack driver will be dropped */
 int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn,
                              int hangup_pending)
@@ -453,10 +478,10 @@ static ssize_t ocfs2_max_locking_protocol_show(struct kobject *kobj,
         ssize_t ret = 0;
 
         spin_lock(&ocfs2_stack_lock);
-        if (lproto)
+        if (locking_max_version.pv_major)
                 ret = snprintf(buf, PAGE_SIZE, "%u.%u\n",
-                               lproto->lp_max_version.pv_major,
-                               lproto->lp_max_version.pv_minor);
+                               locking_max_version.pv_major,
+                               locking_max_version.pv_minor);
         spin_unlock(&ocfs2_stack_lock);
 
         return ret;
@@ -685,7 +710,10 @@ static int __init ocfs2_stack_glue_init(void)
 
 static void __exit ocfs2_stack_glue_exit(void)
 {
-        lproto = NULL;
+        memset(&locking_max_version, 0,
+               sizeof(struct ocfs2_protocol_version));
+        locking_max_version.pv_major = 0;
+        locking_max_version.pv_minor = 0;
         ocfs2_sysfs_exit();
         if (ocfs2_table_header)
                 unregister_sysctl_table(ocfs2_table_header);
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index 03a44d60eac9..8ce7398ae1d2 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -56,17 +56,6 @@ struct ocfs2_protocol_version {
 };
 
 /*
- * The ocfs2_locking_protocol defines the handlers called on ocfs2's behalf.
- */
-struct ocfs2_locking_protocol {
-        struct ocfs2_protocol_version lp_max_version;
-        void (*lp_lock_ast)(void *astarg);
-        void (*lp_blocking_ast)(void *astarg, int level);
-        void (*lp_unlock_ast)(void *astarg, int error);
-};
-
-
-/*
  * The dlm_lockstatus struct includes lvb space, but the dlm_lksb struct only
  * has a pointer to separately allocated lvb space.  This struct exists only to
  * include in the lksb union to make space for a combined dlm_lksb and lvb.
@@ -81,12 +70,27 @@ struct fsdlm_lksb_plus_lvb {
  * size of the union is known.  Lock status structures are embedded in
  * ocfs2 inodes.
  */
-union ocfs2_dlm_lksb {
-        struct dlm_lockstatus lksb_o2dlm;
-        struct dlm_lksb lksb_fsdlm;
-        struct fsdlm_lksb_plus_lvb padding;
+struct ocfs2_cluster_connection;
+struct ocfs2_dlm_lksb {
+         union {
+                 struct dlm_lockstatus lksb_o2dlm;
+                 struct dlm_lksb lksb_fsdlm;
+                 struct fsdlm_lksb_plus_lvb padding;
+         };
+         struct ocfs2_cluster_connection *lksb_conn;
+};
+
+/*
+ * The ocfs2_locking_protocol defines the handlers called on ocfs2's behalf.
+ */
+struct ocfs2_locking_protocol {
+        struct ocfs2_protocol_version lp_max_version;
+        void (*lp_lock_ast)(struct ocfs2_dlm_lksb *lksb);
+        void (*lp_blocking_ast)(struct ocfs2_dlm_lksb *lksb, int level);
+        void (*lp_unlock_ast)(struct ocfs2_dlm_lksb *lksb, int error);
 };
 
+
 /*
  * A cluster connection.  Mostly opaque to ocfs2, the connection holds
  * state for the underlying stack.  ocfs2 does use cc_version to determine
@@ -96,6 +100,7 @@ struct ocfs2_cluster_connection {
         char cc_name[GROUP_NAME_MAX];
         int cc_namelen;
         struct ocfs2_protocol_version cc_version;
+        struct ocfs2_locking_protocol *cc_proto;
         void (*cc_recovery_handler)(int node_num, void *recovery_data);
         void *cc_recovery_data;
         void *cc_lockspace;
@@ -155,27 +160,29 @@ struct ocfs2_stack_operations {
          *
          * ast and bast functions are not part of the call because the
          * stack will likely want to wrap ast and bast calls before passing
-         * them to stack->sp_proto.
+         * them to stack->sp_proto.  There is no astarg.  The lksb will
+         * be passed back to the ast and bast functions.  The caller can
+         * use this to find their object.
          */
         int (*dlm_lock)(struct ocfs2_cluster_connection *conn,
                         int mode,
-                        union ocfs2_dlm_lksb *lksb,
+                        struct ocfs2_dlm_lksb *lksb,
                         u32 flags,
                         void *name,
-                        unsigned int namelen,
-                        void *astarg);
+                        unsigned int namelen);
 
         /*
          * Call the underlying dlm unlock function.  The ->dlm_unlock()
          * function should convert the flags as appropriate.
          *
          * The unlock ast is not passed, as the stack will want to wrap
-         * it before calling stack->sp_proto->lp_unlock_ast().
+         * it before calling stack->sp_proto->lp_unlock_ast().  There is
+         * no astarg.  The lksb will be passed back to the unlock ast
+         * function.  The caller can use this to find their object.
          */
         int (*dlm_unlock)(struct ocfs2_cluster_connection *conn,
-                          union ocfs2_dlm_lksb *lksb,
-                          u32 flags,
-                          void *astarg);
+                          struct ocfs2_dlm_lksb *lksb,
+                          u32 flags);
 
         /*
          * Return the status of the current lock status block.  The fs
@@ -183,17 +190,17 @@ struct ocfs2_stack_operations {
          * callback pulls out the stack-specific lksb, converts the status
          * to a proper errno, and returns it.
          */
-        int (*lock_status)(union ocfs2_dlm_lksb *lksb);
+        int (*lock_status)(struct ocfs2_dlm_lksb *lksb);
 
         /*
          * Return non-zero if the LVB is valid.
          */
-        int (*lvb_valid)(union ocfs2_dlm_lksb *lksb);
+        int (*lvb_valid)(struct ocfs2_dlm_lksb *lksb);
 
         /*
          * Pull the lvb pointer off of the stack-specific lksb.
          */
-        void *(*lock_lvb)(union ocfs2_dlm_lksb *lksb);
+        void *(*lock_lvb)(struct ocfs2_dlm_lksb *lksb);
 
         /*
          * Cluster-aware posix locks
@@ -210,7 +217,7 @@ struct ocfs2_stack_operations {
          * This is an optoinal debugging hook.  If provided, the
          * stack can dump debugging information about this lock.
          */
-        void (*dump_lksb)(union ocfs2_dlm_lksb *lksb);
+        void (*dump_lksb)(struct ocfs2_dlm_lksb *lksb);
 };
 
 /*
@@ -226,7 +233,7 @@ struct ocfs2_stack_plugin {
         /* These are managed by the stackglue code. */
         struct list_head sp_list;
         unsigned int sp_count;
-        struct ocfs2_locking_protocol *sp_proto;
+        struct ocfs2_protocol_version sp_max_proto;
 };
 
 
@@ -234,10 +241,22 @@ struct ocfs2_stack_plugin {
 int ocfs2_cluster_connect(const char *stack_name,
                           const char *group,
                           int grouplen,
+                          struct ocfs2_locking_protocol *lproto,
                           void (*recovery_handler)(int node_num,
                                                    void *recovery_data),
                           void *recovery_data,
                           struct ocfs2_cluster_connection **conn);
+/*
+ * Used by callers that don't store their stack name.  They must ensure
+ * all nodes have the same stack.
+ */
+int ocfs2_cluster_connect_agnostic(const char *group,
+                                   int grouplen,
+                                   struct ocfs2_locking_protocol *lproto,
+                                   void (*recovery_handler)(int node_num,
+                                                            void *recovery_data),
+                                   void *recovery_data,
+                                   struct ocfs2_cluster_connection **conn);
 int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn,
                              int hangup_pending);
 void ocfs2_cluster_hangup(const char *group, int grouplen);
@@ -246,26 +265,24 @@ int ocfs2_cluster_this_node(unsigned int *node);
 struct ocfs2_lock_res;
 int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
                    int mode,
-                   union ocfs2_dlm_lksb *lksb,
+                   struct ocfs2_dlm_lksb *lksb,
                    u32 flags,
                    void *name,
-                   unsigned int namelen,
-                   struct ocfs2_lock_res *astarg);
+                   unsigned int namelen);
 int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
-                     union ocfs2_dlm_lksb *lksb,
-                     u32 flags,
-                     struct ocfs2_lock_res *astarg);
+                     struct ocfs2_dlm_lksb *lksb,
+                     u32 flags);
 
-int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
-int ocfs2_dlm_lvb_valid(union ocfs2_dlm_lksb *lksb);
-void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb);
-void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb);
+int ocfs2_dlm_lock_status(struct ocfs2_dlm_lksb *lksb);
+int ocfs2_dlm_lvb_valid(struct ocfs2_dlm_lksb *lksb);
+void *ocfs2_dlm_lvb(struct ocfs2_dlm_lksb *lksb);
+void ocfs2_dlm_dump_lksb(struct ocfs2_dlm_lksb *lksb);
 
 int ocfs2_stack_supports_plocks(void);
 int ocfs2_plock(struct ocfs2_cluster_connection *conn, u64 ino,
                 struct file *file, int cmd, struct file_lock *fl);
 
-void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto);
+void ocfs2_stack_glue_set_max_proto_version(struct ocfs2_protocol_version *max_proto);
 
 
 /* Used by stack plugins */
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index c30b644d9572..c3c60bc3e072 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -51,7 +51,7 @@
 #define ALLOC_NEW_GROUP                 0x1
 #define ALLOC_GROUPS_FROM_GLOBAL        0x2
 
-#define OCFS2_MAX_INODES_TO_STEAL       1024
+#define OCFS2_MAX_TO_STEAL              1024
 
 static inline void ocfs2_debug_bg(struct ocfs2_group_desc *bg);
 static inline void ocfs2_debug_suballoc_inode(struct ocfs2_dinode *fe);
@@ -637,12 +637,113 @@ bail:
         return status;
 }
 
+static void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb)
+{
+        spin_lock(&osb->osb_lock);
+        osb->s_inode_steal_slot = OCFS2_INVALID_SLOT;
+        spin_unlock(&osb->osb_lock);
+        atomic_set(&osb->s_num_inodes_stolen, 0);
+}
+
+static void ocfs2_init_meta_steal_slot(struct ocfs2_super *osb)
+{
+        spin_lock(&osb->osb_lock);
+        osb->s_meta_steal_slot = OCFS2_INVALID_SLOT;
+        spin_unlock(&osb->osb_lock);
+        atomic_set(&osb->s_num_meta_stolen, 0);
+}
+
+void ocfs2_init_steal_slots(struct ocfs2_super *osb)
+{
+        ocfs2_init_inode_steal_slot(osb);
+        ocfs2_init_meta_steal_slot(osb);
+}
+
+static void __ocfs2_set_steal_slot(struct ocfs2_super *osb, int slot, int type)
+{
+        spin_lock(&osb->osb_lock);
+        if (type == INODE_ALLOC_SYSTEM_INODE)
+                osb->s_inode_steal_slot = slot;
+        else if (type == EXTENT_ALLOC_SYSTEM_INODE)
+                osb->s_meta_steal_slot = slot;
+        spin_unlock(&osb->osb_lock);
+}
+
+static int __ocfs2_get_steal_slot(struct ocfs2_super *osb, int type)
+{
+        int slot = OCFS2_INVALID_SLOT;
+
+        spin_lock(&osb->osb_lock);
+        if (type == INODE_ALLOC_SYSTEM_INODE)
+                slot = osb->s_inode_steal_slot;
+        else if (type == EXTENT_ALLOC_SYSTEM_INODE)
+                slot = osb->s_meta_steal_slot;
+        spin_unlock(&osb->osb_lock);
+
+        return slot;
+}
+
+static int ocfs2_get_inode_steal_slot(struct ocfs2_super *osb)
+{
+        return __ocfs2_get_steal_slot(osb, INODE_ALLOC_SYSTEM_INODE);
+}
+
+static int ocfs2_get_meta_steal_slot(struct ocfs2_super *osb)
+{
+        return __ocfs2_get_steal_slot(osb, EXTENT_ALLOC_SYSTEM_INODE);
+}
+
+static int ocfs2_steal_resource(struct ocfs2_super *osb,
+                                struct ocfs2_alloc_context *ac,
+                                int type)
+{
+        int i, status = -ENOSPC;
+        int slot = __ocfs2_get_steal_slot(osb, type);
+
+        /* Start to steal resource from the first slot after ours. */
+        if (slot == OCFS2_INVALID_SLOT)
+                slot = osb->slot_num + 1;
+
+        for (i = 0; i < osb->max_slots; i++, slot++) {
+                if (slot == osb->max_slots)
+                        slot = 0;
+
+                if (slot == osb->slot_num)
+                        continue;
+
+                status = ocfs2_reserve_suballoc_bits(osb, ac,
+                                                     type,
+                                                     (u32)slot, NULL,
+                                                     NOT_ALLOC_NEW_GROUP);
+                if (status >= 0) {
+                        __ocfs2_set_steal_slot(osb, slot, type);
+                        break;
+                }
+
+                ocfs2_free_ac_resource(ac);
+        }
+
+        return status;
+}
+
+static int ocfs2_steal_inode(struct ocfs2_super *osb,
+                             struct ocfs2_alloc_context *ac)
+{
+        return ocfs2_steal_resource(osb, ac, INODE_ALLOC_SYSTEM_INODE);
+}
+
+static int ocfs2_steal_meta(struct ocfs2_super *osb,
+                            struct ocfs2_alloc_context *ac)
+{
+        return ocfs2_steal_resource(osb, ac, EXTENT_ALLOC_SYSTEM_INODE);
+}
+
 int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
                                       int blocks,
                                       struct ocfs2_alloc_context **ac)
 {
         int status;
-        u32 slot;
+        int slot = ocfs2_get_meta_steal_slot(osb);
 
         *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
         if (!(*ac)) {
@@ -653,12 +754,34 @@ int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
 
         (*ac)->ac_bits_wanted = blocks;
         (*ac)->ac_which = OCFS2_AC_USE_META;
-        slot = osb->slot_num;
         (*ac)->ac_group_search = ocfs2_block_group_search;
 
+        if (slot != OCFS2_INVALID_SLOT &&
+                atomic_read(&osb->s_num_meta_stolen) < OCFS2_MAX_TO_STEAL)
+                goto extent_steal;
+
+        atomic_set(&osb->s_num_meta_stolen, 0);
         status = ocfs2_reserve_suballoc_bits(osb, (*ac),
                                              EXTENT_ALLOC_SYSTEM_INODE,
-                                             slot, NULL, ALLOC_NEW_GROUP);
+                                             (u32)osb->slot_num, NULL,
+                                             ALLOC_NEW_GROUP);
+
+
+        if (status >= 0) {
+                status = 0;
+                if (slot != OCFS2_INVALID_SLOT)
+                        ocfs2_init_meta_steal_slot(osb);
+                goto bail;
+        } else if (status < 0 && status != -ENOSPC) {
+                mlog_errno(status);
+                goto bail;
+        }
+
+        ocfs2_free_ac_resource(*ac);
+
+extent_steal:
+        status = ocfs2_steal_meta(osb, *ac);
+        atomic_inc(&osb->s_num_meta_stolen);
         if (status < 0) {
                 if (status != -ENOSPC)
                         mlog_errno(status);
@@ -685,43 +808,11 @@ int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
                                         ac);
 }
 
-static int ocfs2_steal_inode_from_other_nodes(struct ocfs2_super *osb,
-                                              struct ocfs2_alloc_context *ac)
-{
-        int i, status = -ENOSPC;
-        s16 slot = ocfs2_get_inode_steal_slot(osb);
-
-        /* Start to steal inodes from the first slot after ours. */
-        if (slot == OCFS2_INVALID_SLOT)
-                slot = osb->slot_num + 1;
-
-        for (i = 0; i < osb->max_slots; i++, slot++) {
-                if (slot == osb->max_slots)
-                        slot = 0;
-
-                if (slot == osb->slot_num)
-                        continue;
-
-                status = ocfs2_reserve_suballoc_bits(osb, ac,
-                                                     INODE_ALLOC_SYSTEM_INODE,
-                                                     slot, NULL,
-                                                     NOT_ALLOC_NEW_GROUP);
-                if (status >= 0) {
-                        ocfs2_set_inode_steal_slot(osb, slot);
-                        break;
-                }
-
-                ocfs2_free_ac_resource(ac);
-        }
-
-        return status;
-}
-
 int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
                             struct ocfs2_alloc_context **ac)
 {
         int status;
-        s16 slot = ocfs2_get_inode_steal_slot(osb);
+        int slot = ocfs2_get_inode_steal_slot(osb);
         u64 alloc_group;
 
         *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
@@ -754,14 +845,14 @@ int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
          * need to check our slots to see whether there is some space for us.
          */
         if (slot != OCFS2_INVALID_SLOT &&
-            atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_INODES_TO_STEAL)
+            atomic_read(&osb->s_num_inodes_stolen) < OCFS2_MAX_TO_STEAL)
                 goto inode_steal;
 
         atomic_set(&osb->s_num_inodes_stolen, 0);
         alloc_group = osb->osb_inode_alloc_group;
         status = ocfs2_reserve_suballoc_bits(osb, *ac,
                                              INODE_ALLOC_SYSTEM_INODE,
-                                             osb->slot_num,
+                                             (u32)osb->slot_num,
                                              &alloc_group,
                                              ALLOC_NEW_GROUP |
                                              ALLOC_GROUPS_FROM_GLOBAL);
@@ -789,7 +880,7 @@ int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
         ocfs2_free_ac_resource(*ac);
 
 inode_steal:
-        status = ocfs2_steal_inode_from_other_nodes(osb, *ac);
+        status = ocfs2_steal_inode(osb, *ac);
         atomic_inc(&osb->s_num_inodes_stolen);
         if (status < 0) {
                 if (status != -ENOSPC)
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 8c9a78a43164..fa60723c43e8 100644
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -56,6 +56,7 @@ struct ocfs2_alloc_context {
                                  is the same as ~0 - unlimited */
 };
 
+void ocfs2_init_steal_slots(struct ocfs2_super *osb);
 void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac);
 static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac)
 {
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 755cd49a5ef3..dee03197a494 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -69,6 +69,7 @@
 #include "xattr.h"
 #include "quota.h"
 #include "refcounttree.h"
+#include "suballoc.h"
 
 #include "buffer_head_io.h"
 
@@ -301,9 +302,12 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
 
         spin_lock(&osb->osb_lock);
         out += snprintf(buf + out, len - out,
-                        "%10s => Slot: %d  NumStolen: %d\n", "Steal",
+                        "%10s => InodeSlot: %d  StolenInodes: %d, "
+                        "MetaSlot: %d  StolenMeta: %d\n", "Steal",
                         osb->s_inode_steal_slot,
-                        atomic_read(&osb->s_num_inodes_stolen));
+                        atomic_read(&osb->s_num_inodes_stolen),
+                        osb->s_meta_steal_slot,
+                        atomic_read(&osb->s_num_meta_stolen));
         spin_unlock(&osb->osb_lock);
 
         out += snprintf(buf + out, len - out, "OrphanScan => ");
@@ -1997,7 +2001,7 @@ static int ocfs2_initialize_super(struct super_block *sb,
         osb->blocked_lock_count = 0;
         spin_lock_init(&osb->osb_lock);
         spin_lock_init(&osb->osb_xattr_lock);
-        ocfs2_init_inode_steal_slot(osb);
+        ocfs2_init_steal_slots(osb);
 
         atomic_set(&osb->alloc_stats.moves, 0);
         atomic_set(&osb->alloc_stats.local_data, 0);
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 8fc6fb071c6d..d1b0d386f6d1 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -116,10 +116,11 @@ static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
 };
 
 struct ocfs2_xattr_info {
-        int name_index;
-        const char *name;
-        const void *value;
-        size_t value_len;
+        int             xi_name_index;
+        const char      *xi_name;
+        int             xi_name_len;
+        const void      *xi_value;
+        size_t          xi_value_len;
 };
 
 struct ocfs2_xattr_search {
@@ -137,6 +138,115 @@ struct ocfs2_xattr_search {
         int not_found;
 };
 
+/* Operations on struct ocfs2_xa_entry */
+struct ocfs2_xa_loc;
+struct ocfs2_xa_loc_operations {
+        /*
+         * Journal functions
+         */
+        int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc,
+                                  int type);
+        void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc);
+
+        /*
+         * Return a pointer to the appropriate buffer in loc->xl_storage
+         * at the given offset from loc->xl_header.
+         */
+        void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset);
+
+        /* Can we reuse the existing entry for the new value? */
+        int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc,
+                             struct ocfs2_xattr_info *xi);
+
+        /* How much space is needed for the new value? */
+        int (*xlo_check_space)(struct ocfs2_xa_loc *loc,
+                               struct ocfs2_xattr_info *xi);
+
+        /*
+         * Return the offset of the first name+value pair.  This is
+         * the start of our downward-filling free space.
+         */
+        int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc);
+
+        /*
+         * Remove the name+value at this location.  Do whatever is
+         * appropriate with the remaining name+value pairs.
+         */
+        void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc);
+
+        /* Fill xl_entry with a new entry */
+        void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash);
+
+        /* Add name+value storage to an entry */
+        void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size);
+
+        /*
+         * Initialize the value buf's access and bh fields for this entry.
+         * ocfs2_xa_fill_value_buf() will handle the xv pointer.
+         */
+        void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc,
+                                   struct ocfs2_xattr_value_buf *vb);
+};
+
+/*
+ * Describes an xattr entry location.  This is a memory structure
+ * tracking the on-disk structure.
+ */
+struct ocfs2_xa_loc {
+        /* This xattr belongs to this inode */
+        struct inode *xl_inode;
+
+        /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */
+        struct ocfs2_xattr_header *xl_header;
+
+        /* Bytes from xl_header to the end of the storage */
+        int xl_size;
+
+        /*
+         * The ocfs2_xattr_entry this location describes.  If this is
+         * NULL, this location describes the on-disk structure where it
+         * would have been.
+         */
+        struct ocfs2_xattr_entry *xl_entry;
+
+        /*
+         * Internal housekeeping
+         */
+
+        /* Buffer(s) containing this entry */
+        void *xl_storage;
+
+        /* Operations on the storage backing this location */
+        const struct ocfs2_xa_loc_operations *xl_ops;
+};
+
+/*
+ * Convenience functions to calculate how much space is needed for a
+ * given name+value pair
+ */
+static int namevalue_size(int name_len, uint64_t value_len)
+{
+        if (value_len > OCFS2_XATTR_INLINE_SIZE)
+                return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
+        else
+                return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
+}
+
+static int namevalue_size_xi(struct ocfs2_xattr_info *xi)
+{
+        return namevalue_size(xi->xi_name_len, xi->xi_value_len);
+}
+
+static int namevalue_size_xe(struct ocfs2_xattr_entry *xe)
+{
+        u64 value_len = le64_to_cpu(xe->xe_value_size);
+
+        BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) &&
+               ocfs2_xattr_is_local(xe));
+        return namevalue_size(xe->xe_name_len, value_len);
+}
+
+
 static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb,
                                              struct ocfs2_xattr_header *xh,
                                              int index,
@@ -212,14 +322,6 @@ static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
         return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
 }
 
-static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
-{
-        u16 len = sb->s_blocksize -
-                 offsetof(struct ocfs2_xattr_header, xh_entries);
-
-        return len / sizeof(struct ocfs2_xattr_entry);
-}
-
 #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
 #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
 #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
@@ -463,35 +565,22 @@ static u32 ocfs2_xattr_name_hash(struct inode *inode,
         return hash;
 }
 
-/*
- * ocfs2_xattr_hash_entry()
- *
- * Compute the hash of an extended attribute.
- */
-static void ocfs2_xattr_hash_entry(struct inode *inode,
-                                   struct ocfs2_xattr_header *header,
-                                   struct ocfs2_xattr_entry *entry)
+static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
 {
-        u32 hash = 0;
-        char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
-
-        hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len);
-        entry->xe_name_hash = cpu_to_le32(hash);
-
-        return;
+        return namevalue_size(name_len, value_len) +
+                sizeof(struct ocfs2_xattr_entry);
 }
 
-static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
+static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi)
 {
-        int size = 0;
-
-        if (value_len <= OCFS2_XATTR_INLINE_SIZE)
-                size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
-        else
-                size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
-        size += sizeof(struct ocfs2_xattr_entry);
+        return namevalue_size_xi(xi) +
+                sizeof(struct ocfs2_xattr_entry);
+}
 
-        return size;
+static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe)
+{
+        return namevalue_size_xe(xe) +
+                sizeof(struct ocfs2_xattr_entry);
 }
 
 int ocfs2_calc_security_init(struct inode *dir,
@@ -1308,452 +1397,897 @@ out:
         return ret;
 }
 
-static int ocfs2_xattr_cleanup(struct inode *inode,
-                               handle_t *handle,
-                               struct ocfs2_xattr_info *xi,
-                               struct ocfs2_xattr_search *xs,
-                               struct ocfs2_xattr_value_buf *vb,
-                               size_t offs)
+static int ocfs2_xa_check_space_helper(int needed_space, int free_start,
+                                       int num_entries)
 {
-        int ret = 0;
-        size_t name_len = strlen(xi->name);
-        void *val = xs->base + offs;
-        size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
+        int free_space;
 
-        ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
-                            OCFS2_JOURNAL_ACCESS_WRITE);
-        if (ret) {
-                mlog_errno(ret);
-                goto out;
-        }
-        /* Decrease xattr count */
-        le16_add_cpu(&xs->header->xh_count, -1);
-        /* Remove the xattr entry and tree root which has already be set*/
-        memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
-        memset(val, 0, size);
+        if (!needed_space)
+                return 0;
 
-        ret = ocfs2_journal_dirty(handle, vb->vb_bh);
-        if (ret < 0)
-                mlog_errno(ret);
-out:
-        return ret;
+        free_space = free_start -
+                sizeof(struct ocfs2_xattr_header) -
+                (num_entries * sizeof(struct ocfs2_xattr_entry)) -
+                OCFS2_XATTR_HEADER_GAP;
+        if (free_space < 0)
+                return -EIO;
+        if (free_space < needed_space)
+                return -ENOSPC;
+
+        return 0;
 }
 
-static int ocfs2_xattr_update_entry(struct inode *inode,
-                                    handle_t *handle,
-                                    struct ocfs2_xattr_info *xi,
-                                    struct ocfs2_xattr_search *xs,
-                                    struct ocfs2_xattr_value_buf *vb,
-                                    size_t offs)
+static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc,
+                                   int type)
 {
-        int ret;
+        return loc->xl_ops->xlo_journal_access(handle, loc, type);
+}
 
-        ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
-                            OCFS2_JOURNAL_ACCESS_WRITE);
-        if (ret) {
-                mlog_errno(ret);
-                goto out;
-        }
+static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc)
+{
+        loc->xl_ops->xlo_journal_dirty(handle, loc);
+}
 
-        xs->here->xe_name_offset = cpu_to_le16(offs);
-        xs->here->xe_value_size = cpu_to_le64(xi->value_len);
-        if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
-                ocfs2_xattr_set_local(xs->here, 1);
-        else
-                ocfs2_xattr_set_local(xs->here, 0);
-        ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
+/* Give a pointer into the storage for the given offset */
+static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset)
+{
+        BUG_ON(offset >= loc->xl_size);
+        return loc->xl_ops->xlo_offset_pointer(loc, offset);
+}
 
-        ret = ocfs2_journal_dirty(handle, vb->vb_bh);
-        if (ret < 0)
-                mlog_errno(ret);
-out:
-        return ret;
+/*
+ * Wipe the name+value pair and allow the storage to reclaim it.  This
+ * must be followed by either removal of the entry or a call to
+ * ocfs2_xa_add_namevalue().
+ */
+static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc)
+{
+        loc->xl_ops->xlo_wipe_namevalue(loc);
 }
 
 /*
- * ocfs2_xattr_set_value_outside()
- *
- * Set large size value in B tree.
+ * Find lowest offset to a name+value pair.  This is the start of our
+ * downward-growing free space.
  */
-static int ocfs2_xattr_set_value_outside(struct inode *inode,
-                                         struct ocfs2_xattr_info *xi,
-                                         struct ocfs2_xattr_search *xs,
-                                         struct ocfs2_xattr_set_ctxt *ctxt,
-                                         struct ocfs2_xattr_value_buf *vb,
-                                         size_t offs)
+static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc)
 {
-        size_t name_len = strlen(xi->name);
-        void *val = xs->base + offs;
-        struct ocfs2_xattr_value_root *xv = NULL;
-        size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
-        int ret = 0;
+        return loc->xl_ops->xlo_get_free_start(loc);
+}
 
-        memset(val, 0, size);
-        memcpy(val, xi->name, name_len);
-        xv = (struct ocfs2_xattr_value_root *)
-                (val + OCFS2_XATTR_SIZE(name_len));
-        xv->xr_clusters = 0;
-        xv->xr_last_eb_blk = 0;
-        xv->xr_list.l_tree_depth = 0;
-        xv->xr_list.l_count = cpu_to_le16(1);
-        xv->xr_list.l_next_free_rec = 0;
-        vb->vb_xv = xv;
-
-        ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt);
-        if (ret < 0) {
-                mlog_errno(ret);
-                return ret;
+/* Can we reuse loc->xl_entry for xi? */
+static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc,
+                                    struct ocfs2_xattr_info *xi)
+{
+        return loc->xl_ops->xlo_can_reuse(loc, xi);
+}
+
+/* How much free space is needed to set the new value */
+static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc,
+                                struct ocfs2_xattr_info *xi)
+{
+        return loc->xl_ops->xlo_check_space(loc, xi);
+}
+
+static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
+{
+        loc->xl_ops->xlo_add_entry(loc, name_hash);
+        loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash);
+        /*
+         * We can't leave the new entry's xe_name_offset at zero or
+         * add_namevalue() will go nuts.  We set it to the size of our
+         * storage so that it can never be less than any other entry.
+         */
+        loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size);
+}
+
+static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc,
+                                   struct ocfs2_xattr_info *xi)
+{
+        int size = namevalue_size_xi(xi);
+        int nameval_offset;
+        char *nameval_buf;
+
+        loc->xl_ops->xlo_add_namevalue(loc, size);
+        loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
+        loc->xl_entry->xe_name_len = xi->xi_name_len;
+        ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index);
+        ocfs2_xattr_set_local(loc->xl_entry,
+                              xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE);
+
+        nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
+        nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
+        memset(nameval_buf, 0, size);
+        memcpy(nameval_buf, xi->xi_name, xi->xi_name_len);
+}
+
+static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc,
+                                    struct ocfs2_xattr_value_buf *vb)
+{
+        int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
+        int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
+
+        /* Value bufs are for value trees */
+        BUG_ON(ocfs2_xattr_is_local(loc->xl_entry));
+        BUG_ON(namevalue_size_xe(loc->xl_entry) !=
+               (name_size + OCFS2_XATTR_ROOT_SIZE));
+
+        loc->xl_ops->xlo_fill_value_buf(loc, vb);
+        vb->vb_xv =
+                (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc,
+                                                        nameval_offset +
+                                                        name_size);
+}
+
+static int ocfs2_xa_block_journal_access(handle_t *handle,
+                                         struct ocfs2_xa_loc *loc, int type)
+{
+        struct buffer_head *bh = loc->xl_storage;
+        ocfs2_journal_access_func access;
+
+        if (loc->xl_size == (bh->b_size -
+                             offsetof(struct ocfs2_xattr_block,
+                                      xb_attrs.xb_header)))
+                access = ocfs2_journal_access_xb;
+        else
+                access = ocfs2_journal_access_di;
+        return access(handle, INODE_CACHE(loc->xl_inode), bh, type);
+}
+
+static void ocfs2_xa_block_journal_dirty(handle_t *handle,
+                                         struct ocfs2_xa_loc *loc)
+{
+        struct buffer_head *bh = loc->xl_storage;
+
+        ocfs2_journal_dirty(handle, bh);
+}
+
+static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc,
+                                           int offset)
+{
+        return (char *)loc->xl_header + offset;
+}
+
+static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc,
+                                    struct ocfs2_xattr_info *xi)
+{
+        /*
+         * Block storage is strict.  If the sizes aren't exact, we will
+         * remove the old one and reinsert the new.
+         */
+        return namevalue_size_xe(loc->xl_entry) ==
+                namevalue_size_xi(xi);
+}
+
+static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc)
+{
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        int i, count = le16_to_cpu(xh->xh_count);
+        int offset, free_start = loc->xl_size;
+
+        for (i = 0; i < count; i++) {
+                offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
+                if (offset < free_start)
+                        free_start = offset;
         }
-        ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs);
-        if (ret < 0) {
-                mlog_errno(ret);
-                return ret;
+
+        return free_start;
+}
+
+static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc,
+                                      struct ocfs2_xattr_info *xi)
+{
+        int count = le16_to_cpu(loc->xl_header->xh_count);
+        int free_start = ocfs2_xa_get_free_start(loc);
+        int needed_space = ocfs2_xi_entry_usage(xi);
+
+        /*
+         * Block storage will reclaim the original entry before inserting
+         * the new value, so we only need the difference.  If the new
+         * entry is smaller than the old one, we don't need anything.
+         */
+        if (loc->xl_entry) {
+                /* Don't need space if we're reusing! */
+                if (ocfs2_xa_can_reuse_entry(loc, xi))
+                        needed_space = 0;
+                else
+                        needed_space -= ocfs2_xe_entry_usage(loc->xl_entry);
         }
-        ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb,
-                                              xi->value, xi->value_len);
-        if (ret < 0)
-                mlog_errno(ret);
+        if (needed_space < 0)
+                needed_space = 0;
+        return ocfs2_xa_check_space_helper(needed_space, free_start, count);
+}
 
-        return ret;
+/*
+ * Block storage for xattrs keeps the name+value pairs compacted.  When
+ * we remove one, we have to shift any that preceded it towards the end.
+ */
+static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc)
+{
+        int i, offset;
+        int namevalue_offset, first_namevalue_offset, namevalue_size;
+        struct ocfs2_xattr_entry *entry = loc->xl_entry;
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        int count = le16_to_cpu(xh->xh_count);
+
+        namevalue_offset = le16_to_cpu(entry->xe_name_offset);
+        namevalue_size = namevalue_size_xe(entry);
+        first_namevalue_offset = ocfs2_xa_get_free_start(loc);
+
+        /* Shift the name+value pairs */
+        memmove((char *)xh + first_namevalue_offset + namevalue_size,
+                (char *)xh + first_namevalue_offset,
+                namevalue_offset - first_namevalue_offset);
+        memset((char *)xh + first_namevalue_offset, 0, namevalue_size);
+
+        /* Now tell xh->xh_entries about it */
+        for (i = 0; i < count; i++) {
+                offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
+                if (offset < namevalue_offset)
+                        le16_add_cpu(&xh->xh_entries[i].xe_name_offset,
+                                     namevalue_size);
+        }
+
+        /*
+         * Note that we don't update xh_free_start or xh_name_value_len
+         * because they're not used in block-stored xattrs.
+         */
+}
+
+static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
+{
+        int count = le16_to_cpu(loc->xl_header->xh_count);
+        loc->xl_entry = &(loc->xl_header->xh_entries[count]);
+        le16_add_cpu(&loc->xl_header->xh_count, 1);
+        memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
+}
+
+static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size)
+{
+        int free_start = ocfs2_xa_get_free_start(loc);
+
+        loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size);
+}
+
+static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc,
+                                          struct ocfs2_xattr_value_buf *vb)
+{
+        struct buffer_head *bh = loc->xl_storage;
+
+        if (loc->xl_size == (bh->b_size -
+                             offsetof(struct ocfs2_xattr_block,
+                                      xb_attrs.xb_header)))
+                vb->vb_access = ocfs2_journal_access_xb;
+        else
+                vb->vb_access = ocfs2_journal_access_di;
+        vb->vb_bh = bh;
 }
 
 /*
- * ocfs2_xattr_set_entry_local()
- *
- * Set, replace or remove extended attribute in local.
+ * Operations for xattrs stored in blocks.  This includes inline inode
+ * storage and unindexed ocfs2_xattr_blocks.
  */
-static void ocfs2_xattr_set_entry_local(struct inode *inode,
-                                        struct ocfs2_xattr_info *xi,
-                                        struct ocfs2_xattr_search *xs,
-                                        struct ocfs2_xattr_entry *last,
-                                        size_t min_offs)
+static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = {
+        .xlo_journal_access     = ocfs2_xa_block_journal_access,
+        .xlo_journal_dirty      = ocfs2_xa_block_journal_dirty,
+        .xlo_offset_pointer     = ocfs2_xa_block_offset_pointer,
+        .xlo_check_space        = ocfs2_xa_block_check_space,
+        .xlo_can_reuse          = ocfs2_xa_block_can_reuse,
+        .xlo_get_free_start     = ocfs2_xa_block_get_free_start,
+        .xlo_wipe_namevalue     = ocfs2_xa_block_wipe_namevalue,
+        .xlo_add_entry          = ocfs2_xa_block_add_entry,
+        .xlo_add_namevalue      = ocfs2_xa_block_add_namevalue,
+        .xlo_fill_value_buf     = ocfs2_xa_block_fill_value_buf,
+};
+
+static int ocfs2_xa_bucket_journal_access(handle_t *handle,
+                                          struct ocfs2_xa_loc *loc, int type)
 {
-        size_t name_len = strlen(xi->name);
-        int i;
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
 
-        if (xi->value && xs->not_found) {
-                /* Insert the new xattr entry. */
-                le16_add_cpu(&xs->header->xh_count, 1);
-                ocfs2_xattr_set_type(last, xi->name_index);
-                ocfs2_xattr_set_local(last, 1);
-                last->xe_name_len = name_len;
-        } else {
-                void *first_val;
-                void *val;
-                size_t offs, size;
-
-                first_val = xs->base + min_offs;
-                offs = le16_to_cpu(xs->here->xe_name_offset);
-                val = xs->base + offs;
-
-                if (le64_to_cpu(xs->here->xe_value_size) >
-                    OCFS2_XATTR_INLINE_SIZE)
-                        size = OCFS2_XATTR_SIZE(name_len) +
-                                OCFS2_XATTR_ROOT_SIZE;
+        return ocfs2_xattr_bucket_journal_access(handle, bucket, type);
+}
+
+static void ocfs2_xa_bucket_journal_dirty(handle_t *handle,
+                                          struct ocfs2_xa_loc *loc)
+{
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
+
+        ocfs2_xattr_bucket_journal_dirty(handle, bucket);
+}
+
+static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc,
+                                            int offset)
+{
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
+        int block, block_offset;
+
+        /* The header is at the front of the bucket */
+        block = offset >> loc->xl_inode->i_sb->s_blocksize_bits;
+        block_offset = offset % loc->xl_inode->i_sb->s_blocksize;
+
+        return bucket_block(bucket, block) + block_offset;
+}
+
+static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc,
+                                     struct ocfs2_xattr_info *xi)
+{
+        return namevalue_size_xe(loc->xl_entry) >=
+                namevalue_size_xi(xi);
+}
+
+static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc)
+{
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
+        return le16_to_cpu(bucket_xh(bucket)->xh_free_start);
+}
+
+static int ocfs2_bucket_align_free_start(struct super_block *sb,
+                                         int free_start, int size)
+{
+        /*
+         * We need to make sure that the name+value pair fits within
+         * one block.
+         */
+        if (((free_start - size) >> sb->s_blocksize_bits) !=
+            ((free_start - 1) >> sb->s_blocksize_bits))
+                free_start -= free_start % sb->s_blocksize;
+
+        return free_start;
+}
+
+static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc,
+                                       struct ocfs2_xattr_info *xi)
+{
+        int rc;
+        int count = le16_to_cpu(loc->xl_header->xh_count);
+        int free_start = ocfs2_xa_get_free_start(loc);
+        int needed_space = ocfs2_xi_entry_usage(xi);
+        int size = namevalue_size_xi(xi);
+        struct super_block *sb = loc->xl_inode->i_sb;
+
+        /*
+         * Bucket storage does not reclaim name+value pairs it cannot
+         * reuse.  They live as holes until the bucket fills, and then
+         * the bucket is defragmented.  However, the bucket can reclaim
+         * the ocfs2_xattr_entry.
+         */
+        if (loc->xl_entry) {
+                /* Don't need space if we're reusing! */
+                if (ocfs2_xa_can_reuse_entry(loc, xi))
+                        needed_space = 0;
                 else
-                        size = OCFS2_XATTR_SIZE(name_len) +
-                        OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
-
-                if (xi->value && size == OCFS2_XATTR_SIZE(name_len) +
-                                OCFS2_XATTR_SIZE(xi->value_len)) {
-                        /* The old and the new value have the
-                           same size. Just replace the value. */
-                        ocfs2_xattr_set_local(xs->here, 1);
-                        xs->here->xe_value_size = cpu_to_le64(xi->value_len);
-                        /* Clear value bytes. */
-                        memset(val + OCFS2_XATTR_SIZE(name_len),
-                               0,
-                               OCFS2_XATTR_SIZE(xi->value_len));
-                        memcpy(val + OCFS2_XATTR_SIZE(name_len),
-                               xi->value,
-                               xi->value_len);
-                        return;
-                }
-                /* Remove the old name+value. */
-                memmove(first_val + size, first_val, val - first_val);
-                memset(first_val, 0, size);
-                xs->here->xe_name_hash = 0;
-                xs->here->xe_name_offset = 0;
-                ocfs2_xattr_set_local(xs->here, 1);
-                xs->here->xe_value_size = 0;
-
-                min_offs += size;
-
-                /* Adjust all value offsets. */
-                last = xs->header->xh_entries;
-                for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
-                        size_t o = le16_to_cpu(last->xe_name_offset);
-
-                        if (o < offs)
-                                last->xe_name_offset = cpu_to_le16(o + size);
-                        last += 1;
-                }
+                        needed_space -= sizeof(struct ocfs2_xattr_entry);
+        }
+        BUG_ON(needed_space < 0);
 
-                if (!xi->value) {
-                        /* Remove the old entry. */
-                        last -= 1;
-                        memmove(xs->here, xs->here + 1,
-                                (void *)last - (void *)xs->here);
-                        memset(last, 0, sizeof(struct ocfs2_xattr_entry));
-                        le16_add_cpu(&xs->header->xh_count, -1);
-                }
+        if (free_start < size) {
+                if (needed_space)
+                        return -ENOSPC;
+        } else {
+                /*
+                 * First we check if it would fit in the first place.
+                 * Below, we align the free start to a block.  This may
+                 * slide us below the minimum gap.  By checking unaligned
+                 * first, we avoid that error.
+                 */
+                rc = ocfs2_xa_check_space_helper(needed_space, free_start,
+                                                 count);
+                if (rc)
+                        return rc;
+                free_start = ocfs2_bucket_align_free_start(sb, free_start,
+                                                           size);
         }
-        if (xi->value) {
-                /* Insert the new name+value. */
-                size_t size = OCFS2_XATTR_SIZE(name_len) +
-                                OCFS2_XATTR_SIZE(xi->value_len);
-                void *val = xs->base + min_offs - size;
+        return ocfs2_xa_check_space_helper(needed_space, free_start, count);
+}
+
+static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc)
+{
+        le16_add_cpu(&loc->xl_header->xh_name_value_len,
+                     -namevalue_size_xe(loc->xl_entry));
+}
 
-                xs->here->xe_name_offset = cpu_to_le16(min_offs - size);
-                memset(val, 0, size);
-                memcpy(val, xi->name, name_len);
-                memcpy(val + OCFS2_XATTR_SIZE(name_len),
-                       xi->value,
-                       xi->value_len);
-                xs->here->xe_value_size = cpu_to_le64(xi->value_len);
-                ocfs2_xattr_set_local(xs->here, 1);
-                ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
+static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
+{
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        int count = le16_to_cpu(xh->xh_count);
+        int low = 0, high = count - 1, tmp;
+        struct ocfs2_xattr_entry *tmp_xe;
+
+        /*
+         * We keep buckets sorted by name_hash, so we need to find
+         * our insert place.
+         */
+        while (low <= high && count) {
+                tmp = (low + high) / 2;
+                tmp_xe = &xh->xh_entries[tmp];
+
+                if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
+                        low = tmp + 1;
+                else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash))
+                        high = tmp - 1;
+                else {
+                        low = tmp;
+                        break;
+                }
         }
 
-        return;
+        if (low != count)
+                memmove(&xh->xh_entries[low + 1],
+                        &xh->xh_entries[low],
+                        ((count - low) * sizeof(struct ocfs2_xattr_entry)));
+
+        le16_add_cpu(&xh->xh_count, 1);
+        loc->xl_entry = &xh->xh_entries[low];
+        memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
+}
+
+static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size)
+{
+        int free_start = ocfs2_xa_get_free_start(loc);
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        struct super_block *sb = loc->xl_inode->i_sb;
+        int nameval_offset;
+
+        free_start = ocfs2_bucket_align_free_start(sb, free_start, size);
+        nameval_offset = free_start - size;
+        loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset);
+        xh->xh_free_start = cpu_to_le16(nameval_offset);
+        le16_add_cpu(&xh->xh_name_value_len, size);
+
+}
+
+static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc,
+                                           struct ocfs2_xattr_value_buf *vb)
+{
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
+        struct super_block *sb = loc->xl_inode->i_sb;
+        int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
+        int size = namevalue_size_xe(loc->xl_entry);
+        int block_offset = nameval_offset >> sb->s_blocksize_bits;
+
+        /* Values are not allowed to straddle block boundaries */
+        BUG_ON(block_offset !=
+               ((nameval_offset + size - 1) >> sb->s_blocksize_bits));
+        /* We expect the bucket to be filled in */
+        BUG_ON(!bucket->bu_bhs[block_offset]);
+
+        vb->vb_access = ocfs2_journal_access;
+        vb->vb_bh = bucket->bu_bhs[block_offset];
+}
+
+/* Operations for xattrs stored in buckets. */
+static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = {
+        .xlo_journal_access     = ocfs2_xa_bucket_journal_access,
+        .xlo_journal_dirty      = ocfs2_xa_bucket_journal_dirty,
+        .xlo_offset_pointer     = ocfs2_xa_bucket_offset_pointer,
+        .xlo_check_space        = ocfs2_xa_bucket_check_space,
+        .xlo_can_reuse          = ocfs2_xa_bucket_can_reuse,
+        .xlo_get_free_start     = ocfs2_xa_bucket_get_free_start,
+        .xlo_wipe_namevalue     = ocfs2_xa_bucket_wipe_namevalue,
+        .xlo_add_entry          = ocfs2_xa_bucket_add_entry,
+        .xlo_add_namevalue      = ocfs2_xa_bucket_add_namevalue,
+        .xlo_fill_value_buf     = ocfs2_xa_bucket_fill_value_buf,
+};
+
+static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc)
+{
+        struct ocfs2_xattr_value_buf vb;
+
+        if (ocfs2_xattr_is_local(loc->xl_entry))
+                return 0;
+
+        ocfs2_xa_fill_value_buf(loc, &vb);
+        return le32_to_cpu(vb.vb_xv->xr_clusters);
+}
+
+static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes,
+                                   struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int trunc_rc, access_rc;
+        struct ocfs2_xattr_value_buf vb;
+
+        ocfs2_xa_fill_value_buf(loc, &vb);
+        trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes,
+                                              ctxt);
+
+        /*
+         * The caller of ocfs2_xa_value_truncate() has already called
+         * ocfs2_xa_journal_access on the loc.  However, The truncate code
+         * calls ocfs2_extend_trans().  This may commit the previous
+         * transaction and open a new one.  If this is a bucket, truncate
+         * could leave only vb->vb_bh set up for journaling.  Meanwhile,
+         * the caller is expecting to dirty the entire bucket.  So we must
+         * reset the journal work.  We do this even if truncate has failed,
+         * as it could have failed after committing the extend.
+         */
+        access_rc = ocfs2_xa_journal_access(ctxt->handle, loc,
+                                            OCFS2_JOURNAL_ACCESS_WRITE);
+
+        /* Errors in truncate take precedence */
+        return trunc_rc ? trunc_rc : access_rc;
+}
+
+static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
+{
+        int index, count;
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        struct ocfs2_xattr_entry *entry = loc->xl_entry;
+
+        ocfs2_xa_wipe_namevalue(loc);
+        loc->xl_entry = NULL;
+
+        le16_add_cpu(&xh->xh_count, -1);
+        count = le16_to_cpu(xh->xh_count);
+
+        /*
+         * Only zero out the entry if there are more remaining.  This is
+         * important for an empty bucket, as it keeps track of the
+         * bucket's hash value.  It doesn't hurt empty block storage.
+         */
+        if (count) {
+                index = ((char *)entry - (char *)&xh->xh_entries) /
+                        sizeof(struct ocfs2_xattr_entry);
+                memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1],
+                        (count - index) * sizeof(struct ocfs2_xattr_entry));
+                memset(&xh->xh_entries[count], 0,
+                       sizeof(struct ocfs2_xattr_entry));
+        }
 }
 
 /*
- * ocfs2_xattr_set_entry()
+ * If we have a problem adjusting the size of an external value during
+ * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr
+ * in an intermediate state.  For example, the value may be partially
+ * truncated.
+ *
+ * If the value tree hasn't changed, the extend/truncate went nowhere.
+ * We have nothing to do.  The caller can treat it as a straight error.
  *
- * Set extended attribute entry into inode or block.
+ * If the value tree got partially truncated, we now have a corrupted
+ * extended attribute.  We're going to wipe its entry and leak the
+ * clusters.  Better to leak some storage than leave a corrupt entry.
  *
- * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE,
- * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(),
- * then set value in B tree with set_value_outside().
+ * If the value tree grew, it obviously didn't grow enough for the
+ * new entry.  We're not going to try and reclaim those clusters either.
+ * If there was already an external value there (orig_clusters != 0),
+ * the new clusters are attached safely and we can just leave the old
+ * value in place.  If there was no external value there, we remove
+ * the entry.
+ *
+ * This way, the xattr block we store in the journal will be consistent.
+ * If the size change broke because of the journal, no changes will hit
+ * disk anyway.
  */
-static int ocfs2_xattr_set_entry(struct inode *inode,
-                                 struct ocfs2_xattr_info *xi,
-                                 struct ocfs2_xattr_search *xs,
-                                 struct ocfs2_xattr_set_ctxt *ctxt,
-                                 int flag)
-{
-        struct ocfs2_xattr_entry *last;
-        struct ocfs2_inode_info *oi = OCFS2_I(inode);
-        struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
-        size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name);
-        size_t size_l = 0;
-        handle_t *handle = ctxt->handle;
-        int free, i, ret;
-        struct ocfs2_xattr_info xi_l = {
-                .name_index = xi->name_index,
-                .name = xi->name,
-                .value = xi->value,
-                .value_len = xi->value_len,
-        };
-        struct ocfs2_xattr_value_buf vb = {
-                .vb_bh = xs->xattr_bh,
-                .vb_access = ocfs2_journal_access_di,
-        };
+static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc,
+                                            const char *what,
+                                            unsigned int orig_clusters)
+{
+        unsigned int new_clusters = ocfs2_xa_value_clusters(loc);
+        char *nameval_buf = ocfs2_xa_offset_pointer(loc,
+                                le16_to_cpu(loc->xl_entry->xe_name_offset));
+
+        if (new_clusters < orig_clusters) {
+                mlog(ML_ERROR,
+                     "Partial truncate while %s xattr %.*s.  Leaking "
+                     "%u clusters and removing the entry\n",
+                     what, loc->xl_entry->xe_name_len, nameval_buf,
+                     orig_clusters - new_clusters);
+                ocfs2_xa_remove_entry(loc);
+        } else if (!orig_clusters) {
+                mlog(ML_ERROR,
+                     "Unable to allocate an external value for xattr "
+                     "%.*s safely.  Leaking %u clusters and removing the "
+                     "entry\n",
+                     loc->xl_entry->xe_name_len, nameval_buf,
+                     new_clusters - orig_clusters);
+                ocfs2_xa_remove_entry(loc);
+        } else if (new_clusters > orig_clusters)
+                mlog(ML_ERROR,
+                     "Unable to grow xattr %.*s safely.  %u new clusters "
+                     "have been added, but the value will not be "
+                     "modified\n",
+                     loc->xl_entry->xe_name_len, nameval_buf,
+                     new_clusters - orig_clusters);
+}
+
+static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc,
+                           struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int rc = 0;
+        unsigned int orig_clusters;
+
+        if (!ocfs2_xattr_is_local(loc->xl_entry)) {
+                orig_clusters = ocfs2_xa_value_clusters(loc);
+                rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
+                if (rc) {
+                        mlog_errno(rc);
+                        /*
+                         * Since this is remove, we can return 0 if
+                         * ocfs2_xa_cleanup_value_truncate() is going to
+                         * wipe the entry anyway.  So we check the
+                         * cluster count as well.
+                         */
+                        if (orig_clusters != ocfs2_xa_value_clusters(loc))
+                                rc = 0;
+                        ocfs2_xa_cleanup_value_truncate(loc, "removing",
+                                                        orig_clusters);
+                        if (rc)
+                                goto out;
+                }
+        }
 
-        if (!(flag & OCFS2_INLINE_XATTR_FL)) {
-                BUG_ON(xs->xattr_bh == xs->inode_bh);
-                vb.vb_access = ocfs2_journal_access_xb;
-        } else
-                BUG_ON(xs->xattr_bh != xs->inode_bh);
+        ocfs2_xa_remove_entry(loc);
 
-        /* Compute min_offs, last and free space. */
-        last = xs->header->xh_entries;
+out:
+        return rc;
+}
 
-        for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
-                size_t offs = le16_to_cpu(last->xe_name_offset);
-                if (offs < min_offs)
-                        min_offs = offs;
-                last += 1;
-        }
+static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc)
+{
+        int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
+        char *nameval_buf;
 
-        free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP;
-        if (free < 0)
-                return -EIO;
+        nameval_buf = ocfs2_xa_offset_pointer(loc,
+                                le16_to_cpu(loc->xl_entry->xe_name_offset));
+        memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE);
+}
 
-        if (!xs->not_found) {
-                size_t size = 0;
-                if (ocfs2_xattr_is_local(xs->here))
-                        size = OCFS2_XATTR_SIZE(name_len) +
-                        OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
-                else
-                        size = OCFS2_XATTR_SIZE(name_len) +
-                                OCFS2_XATTR_ROOT_SIZE;
-                free += (size + sizeof(struct ocfs2_xattr_entry));
-        }
-        /* Check free space in inode or block */
-        if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
-                if (free < sizeof(struct ocfs2_xattr_entry) +
-                           OCFS2_XATTR_SIZE(name_len) +
-                           OCFS2_XATTR_ROOT_SIZE) {
-                        ret = -ENOSPC;
-                        goto out;
+/*
+ * Take an existing entry and make it ready for the new value.  This
+ * won't allocate space, but it may free space.  It should be ready for
+ * ocfs2_xa_prepare_entry() to finish the work.
+ */
+static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc,
+                                struct ocfs2_xattr_info *xi,
+                                struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int rc = 0;
+        int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
+        unsigned int orig_clusters;
+        char *nameval_buf;
+        int xe_local = ocfs2_xattr_is_local(loc->xl_entry);
+        int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE;
+
+        BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) !=
+               name_size);
+
+        nameval_buf = ocfs2_xa_offset_pointer(loc,
+                                le16_to_cpu(loc->xl_entry->xe_name_offset));
+        if (xe_local) {
+                memset(nameval_buf + name_size, 0,
+                       namevalue_size_xe(loc->xl_entry) - name_size);
+                if (!xi_local)
+                        ocfs2_xa_install_value_root(loc);
+        } else {
+                orig_clusters = ocfs2_xa_value_clusters(loc);
+                if (xi_local) {
+                        rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
+                        if (rc < 0)
+                                mlog_errno(rc);
+                        else
+                                memset(nameval_buf + name_size, 0,
+                                       namevalue_size_xe(loc->xl_entry) -
+                                       name_size);
+                } else if (le64_to_cpu(loc->xl_entry->xe_value_size) >
+                           xi->xi_value_len) {
+                        rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len,
+                                                     ctxt);
+                        if (rc < 0)
+                                mlog_errno(rc);
                 }
-                size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
-                xi_l.value = (void *)&def_xv;
-                xi_l.value_len = OCFS2_XATTR_ROOT_SIZE;
-        } else if (xi->value) {
-                if (free < sizeof(struct ocfs2_xattr_entry) +
-                           OCFS2_XATTR_SIZE(name_len) +
-                           OCFS2_XATTR_SIZE(xi->value_len)) {
-                        ret = -ENOSPC;
+
+                if (rc) {
+                        ocfs2_xa_cleanup_value_truncate(loc, "reusing",
+                                                        orig_clusters);
                         goto out;
                 }
         }
 
-        if (!xs->not_found) {
-                /* For existing extended attribute */
-                size_t size = OCFS2_XATTR_SIZE(name_len) +
-                        OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
-                size_t offs = le16_to_cpu(xs->here->xe_name_offset);
-                void *val = xs->base + offs;
+        loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
+        ocfs2_xattr_set_local(loc->xl_entry, xi_local);
 
-                if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
-                        /* Replace existing local xattr with tree root */
-                        ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
-                                                            ctxt, &vb, offs);
-                        if (ret < 0)
-                                mlog_errno(ret);
-                        goto out;
-                } else if (!ocfs2_xattr_is_local(xs->here)) {
-                        /* For existing xattr which has value outside */
-                        vb.vb_xv = (struct ocfs2_xattr_value_root *)
-                                (val + OCFS2_XATTR_SIZE(name_len));
+out:
+        return rc;
+}
 
-                        if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
-                                /*
-                                 * If new value need set outside also,
-                                 * first truncate old value to new value,
-                                 * then set new value with set_value_outside().
-                                 */
-                                ret = ocfs2_xattr_value_truncate(inode,
-                                                                 &vb,
-                                                                 xi->value_len,
-                                                                 ctxt);
-                                if (ret < 0) {
-                                        mlog_errno(ret);
-                                        goto out;
-                                }
+/*
+ * Prepares loc->xl_entry to receive the new xattr.  This includes
+ * properly setting up the name+value pair region.  If loc->xl_entry
+ * already exists, it will take care of modifying it appropriately.
+ *
+ * Note that this modifies the data.  You did journal_access already,
+ * right?
+ */
+static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
+                                  struct ocfs2_xattr_info *xi,
+                                  u32 name_hash,
+                                  struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int rc = 0;
+        unsigned int orig_clusters;
+        __le64 orig_value_size = 0;
 
-                                ret = ocfs2_xattr_update_entry(inode,
-                                                               handle,
-                                                               xi,
-                                                               xs,
-                                                               &vb,
-                                                               offs);
-                                if (ret < 0) {
-                                        mlog_errno(ret);
-                                        goto out;
-                                }
+        rc = ocfs2_xa_check_space(loc, xi);
+        if (rc)
+                goto out;
 
-                                ret = __ocfs2_xattr_set_value_outside(inode,
-                                                                handle,
-                                                                &vb,
-                                                                xi->value,
-                                                                xi->value_len);
-                                if (ret < 0)
-                                        mlog_errno(ret);
+        if (loc->xl_entry) {
+                if (ocfs2_xa_can_reuse_entry(loc, xi)) {
+                        orig_value_size = loc->xl_entry->xe_value_size;
+                        rc = ocfs2_xa_reuse_entry(loc, xi, ctxt);
+                        if (rc)
+                                goto out;
+                        goto alloc_value;
+                }
+
+                if (!ocfs2_xattr_is_local(loc->xl_entry)) {
+                        orig_clusters = ocfs2_xa_value_clusters(loc);
+                        rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
+                        if (rc) {
+                                mlog_errno(rc);
+                                ocfs2_xa_cleanup_value_truncate(loc,
+                                                                "overwriting",
+                                                                orig_clusters);
                                 goto out;
-                        } else {
-                                /*
-                                 * If new value need set in local,
-                                 * just trucate old value to zero.
-                                 */
-                                 ret = ocfs2_xattr_value_truncate(inode,
-                                                                  &vb,
-                                                                  0,
-                                                                  ctxt);
-                                if (ret < 0)
-                                        mlog_errno(ret);
                         }
                 }
+                ocfs2_xa_wipe_namevalue(loc);
+        } else
+                ocfs2_xa_add_entry(loc, name_hash);
+
+        /*
+         * If we get here, we have a blank entry.  Fill it.  We grow our
+         * name+value pair back from the end.
+         */
+        ocfs2_xa_add_namevalue(loc, xi);
+        if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
+                ocfs2_xa_install_value_root(loc);
+
+alloc_value:
+        if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
+                orig_clusters = ocfs2_xa_value_clusters(loc);
+                rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt);
+                if (rc < 0) {
+                        /*
+                         * If we tried to grow an existing external value,
+                         * ocfs2_xa_cleanuP-value_truncate() is going to
+                         * let it stand.  We have to restore its original
+                         * value size.
+                         */
+                        loc->xl_entry->xe_value_size = orig_value_size;
+                        ocfs2_xa_cleanup_value_truncate(loc, "growing",
+                                                        orig_clusters);
+                        mlog_errno(rc);
+                }
         }
 
-        ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh,
+out:
+        return rc;
+}
+
+/*
+ * Store the value portion of the name+value pair.  This will skip
+ * values that are stored externally.  Their tree roots were set up
+ * by ocfs2_xa_prepare_entry().
+ */
+static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc,
+                                struct ocfs2_xattr_info *xi,
+                                struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int rc = 0;
+        int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
+        int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
+        char *nameval_buf;
+        struct ocfs2_xattr_value_buf vb;
+
+        nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
+        if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
+                ocfs2_xa_fill_value_buf(loc, &vb);
+                rc = __ocfs2_xattr_set_value_outside(loc->xl_inode,
+                                                     ctxt->handle, &vb,
+                                                     xi->xi_value,
+                                                     xi->xi_value_len);
+        } else
+                memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len);
+
+        return rc;
+}
+
+static int ocfs2_xa_set(struct ocfs2_xa_loc *loc,
+                        struct ocfs2_xattr_info *xi,
+                        struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int ret;
+        u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name,
+                                              xi->xi_name_len);
+
+        ret = ocfs2_xa_journal_access(ctxt->handle, loc,
                                       OCFS2_JOURNAL_ACCESS_WRITE);
         if (ret) {
                 mlog_errno(ret);
                 goto out;
         }
 
-        if (!(flag & OCFS2_INLINE_XATTR_FL)) {
-                ret = vb.vb_access(handle, INODE_CACHE(inode), vb.vb_bh,
-                                   OCFS2_JOURNAL_ACCESS_WRITE);
-                if (ret) {
-                        mlog_errno(ret);
-                        goto out;
-                }
-        }
-
         /*
-         * Set value in local, include set tree root in local.
-         * This is the first step for value size >INLINE_SIZE.
+         * From here on out, everything is going to modify the buffer a
+         * little.  Errors are going to leave the xattr header in a
+         * sane state.  Thus, even with errors we dirty the sucker.
          */
-        ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
 
-        if (!(flag & OCFS2_INLINE_XATTR_FL)) {
-                ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
-                if (ret < 0) {
-                        mlog_errno(ret);
-                        goto out;
-                }
+        /* Don't worry, we are never called with !xi_value and !xl_entry */
+        if (!xi->xi_value) {
+                ret = ocfs2_xa_remove(loc, ctxt);
+                goto out_dirty;
         }
 
-        if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
-            (flag & OCFS2_INLINE_XATTR_FL)) {
-                struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-                unsigned int xattrsize = osb->s_xattr_inline_size;
-
-                /*
-                 * Adjust extent record count or inline data size
-                 * to reserve space for extended attribute.
-                 */
-                if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
-                        struct ocfs2_inline_data *idata = &di->id2.i_data;
-                        le16_add_cpu(&idata->id_count, -xattrsize);
-                } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
-                        struct ocfs2_extent_list *el = &di->id2.i_list;
-                        le16_add_cpu(&el->l_count, -(xattrsize /
-                                        sizeof(struct ocfs2_extent_rec)));
-                }
-                di->i_xattr_inline_size = cpu_to_le16(xattrsize);
+        ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt);
+        if (ret) {
+                if (ret != -ENOSPC)
+                        mlog_errno(ret);
+                goto out_dirty;
         }
-        /* Update xattr flag */
-        spin_lock(&oi->ip_lock);
-        oi->ip_dyn_features |= flag;
-        di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
-        spin_unlock(&oi->ip_lock);
 
-        ret = ocfs2_journal_dirty(handle, xs->inode_bh);
-        if (ret < 0)
+        ret = ocfs2_xa_store_value(loc, xi, ctxt);
+        if (ret)
                 mlog_errno(ret);
 
-        if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
-                /*
-                 * Set value outside in B tree.
-                 * This is the second step for value size > INLINE_SIZE.
-                 */
-                size_t offs = le16_to_cpu(xs->here->xe_name_offset);
-                ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt,
-                                                    &vb, offs);
-                if (ret < 0) {
-                        int ret2;
+out_dirty:
+        ocfs2_xa_journal_dirty(ctxt->handle, loc);
 
-                        mlog_errno(ret);
-                        /*
-                         * If set value outside failed, we have to clean
-                         * the junk tree root we have already set in local.
-                         */
-                        ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
-                                                   xi, xs, &vb, offs);
-                        if (ret2 < 0)
-                                mlog_errno(ret2);
-                }
-        }
 out:
         return ret;
 }
 
+static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
+                                     struct inode *inode,
+                                     struct buffer_head *bh,
+                                     struct ocfs2_xattr_entry *entry)
+{
+        struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
+
+        BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL));
+
+        loc->xl_inode = inode;
+        loc->xl_ops = &ocfs2_xa_block_loc_ops;
+        loc->xl_storage = bh;
+        loc->xl_entry = entry;
+        loc->xl_size = le16_to_cpu(di->i_xattr_inline_size);
+        loc->xl_header =
+                (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size -
+                                              loc->xl_size);
+}
+
+static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc,
+                                          struct inode *inode,
+                                          struct buffer_head *bh,
+                                          struct ocfs2_xattr_entry *entry)
+{
+        struct ocfs2_xattr_block *xb =
+                (struct ocfs2_xattr_block *)bh->b_data;
+
+        BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED);
+
+        loc->xl_inode = inode;
+        loc->xl_ops = &ocfs2_xa_block_loc_ops;
+        loc->xl_storage = bh;
+        loc->xl_header = &(xb->xb_attrs.xb_header);
+        loc->xl_entry = entry;
+        loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block,
+                                             xb_attrs.xb_header);
+}
+
+static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc,
+                                           struct ocfs2_xattr_bucket *bucket,
+                                           struct ocfs2_xattr_entry *entry)
+{
+        loc->xl_inode = bucket->bu_inode;
+        loc->xl_ops = &ocfs2_xa_bucket_loc_ops;
+        loc->xl_storage = bucket;
+        loc->xl_header = bucket_xh(bucket);
+        loc->xl_entry = entry;
+        loc->xl_size = OCFS2_XATTR_BUCKET_SIZE;
+}
+
 /*
  * In xattr remove, if it is stored outside and refcounted, we may have
  * the chance to split the refcount tree. So need the allocators.
@@ -2149,6 +2683,55 @@ static int ocfs2_xattr_ibody_find(struct inode *inode,
         return 0;
 }
 
+static int ocfs2_xattr_ibody_init(struct inode *inode,
+                                  struct buffer_head *di_bh,
+                                  struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int ret;
+        struct ocfs2_inode_info *oi = OCFS2_I(inode);
+        struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+        unsigned int xattrsize = osb->s_xattr_inline_size;
+
+        if (!ocfs2_xattr_has_space_inline(inode, di)) {
+                ret = -ENOSPC;
+                goto out;
+        }
+
+        ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh,
+                                      OCFS2_JOURNAL_ACCESS_WRITE);
+        if (ret) {
+                mlog_errno(ret);
+                goto out;
+        }
+
+        /*
+         * Adjust extent record count or inline data size
+         * to reserve space for extended attribute.
+         */
+        if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+                struct ocfs2_inline_data *idata = &di->id2.i_data;
+                le16_add_cpu(&idata->id_count, -xattrsize);
+        } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
+                struct ocfs2_extent_list *el = &di->id2.i_list;
+                le16_add_cpu(&el->l_count, -(xattrsize /
+                                             sizeof(struct ocfs2_extent_rec)));
+        }
+        di->i_xattr_inline_size = cpu_to_le16(xattrsize);
+
+        spin_lock(&oi->ip_lock);
+        oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL;
+        di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
+        spin_unlock(&oi->ip_lock);
+
+        ret = ocfs2_journal_dirty(ctxt->handle, di_bh);
+        if (ret < 0)
+                mlog_errno(ret);
+
+out:
+        return ret;
+}
+
 /*
  * ocfs2_xattr_ibody_set()
  *
@@ -2160,9 +2743,10 @@ static int ocfs2_xattr_ibody_set(struct inode *inode,
                                  struct ocfs2_xattr_search *xs,
                                  struct ocfs2_xattr_set_ctxt *ctxt)
 {
+        int ret;
         struct ocfs2_inode_info *oi = OCFS2_I(inode);
         struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
-        int ret;
+        struct ocfs2_xa_loc loc;
 
         if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
                 return -ENOSPC;
@@ -2175,8 +2759,25 @@ static int ocfs2_xattr_ibody_set(struct inode *inode,
                 }
         }
 
-        ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
-                                (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
+        if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
+                ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt);
+                if (ret) {
+                        if (ret != -ENOSPC)
+                                mlog_errno(ret);
+                        goto out;
+                }
+        }
+
+        ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh,
+                                 xs->not_found ? NULL : xs->here);
+        ret = ocfs2_xa_set(&loc, xi, ctxt);
+        if (ret) {
+                if (ret != -ENOSPC)
+                        mlog_errno(ret);
+                goto out;
+        }
+        xs->here = loc.xl_entry;
+
 out:
         up_write(&oi->ip_alloc_sem);
 
@@ -2236,12 +2837,11 @@ cleanup:
         return ret;
 }
 
-static int ocfs2_create_xattr_block(handle_t *handle,
-                                    struct inode *inode,
+static int ocfs2_create_xattr_block(struct inode *inode,
                                     struct buffer_head *inode_bh,
-                                    struct ocfs2_alloc_context *meta_ac,
-                                    struct buffer_head **ret_bh,
-                                    int indexed)
+                                    struct ocfs2_xattr_set_ctxt *ctxt,
+                                    int indexed,
+                                    struct buffer_head **ret_bh)
 {
         int ret;
         u16 suballoc_bit_start;
@@ -2252,14 +2852,14 @@ static int ocfs2_create_xattr_block(handle_t *handle,
         struct buffer_head *new_bh = NULL;
         struct ocfs2_xattr_block *xblk;
 
-        ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), inode_bh,
-                                      OCFS2_JOURNAL_ACCESS_CREATE);
+        ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
+                                      inode_bh, OCFS2_JOURNAL_ACCESS_CREATE);
         if (ret < 0) {
                 mlog_errno(ret);
                 goto end;
         }
 
-        ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1,
+        ret = ocfs2_claim_metadata(osb, ctxt->handle, ctxt->meta_ac, 1,
                                    &suballoc_bit_start, &num_got,
                                    &first_blkno);
         if (ret < 0) {
@@ -2270,7 +2870,7 @@ static int ocfs2_create_xattr_block(handle_t *handle,
         new_bh = sb_getblk(inode->i_sb, first_blkno);
         ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
 
-        ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode),
+        ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode),
                                       new_bh,
                                       OCFS2_JOURNAL_ACCESS_CREATE);
         if (ret < 0) {
@@ -2282,11 +2882,10 @@ static int ocfs2_create_xattr_block(handle_t *handle,
         xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
         memset(xblk, 0, inode->i_sb->s_blocksize);
         strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
-        xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
+        xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot);
         xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
         xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
         xblk->xb_blkno = cpu_to_le64(first_blkno);
-
         if (indexed) {
                 struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root;
                 xr->xt_clusters = cpu_to_le32(1);
@@ -2297,14 +2896,17 @@ static int ocfs2_create_xattr_block(handle_t *handle,
                 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
                 xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED);
         }
+        ocfs2_journal_dirty(ctxt->handle, new_bh);
 
-        ret = ocfs2_journal_dirty(handle, new_bh);
-        if (ret < 0) {
-                mlog_errno(ret);
-                goto end;
-        }
+        /* Add it to the inode */
         di->i_xattr_loc = cpu_to_le64(first_blkno);
-        ocfs2_journal_dirty(handle, inode_bh);
+
+        spin_lock(&OCFS2_I(inode)->ip_lock);
+        OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
+        di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
+        spin_unlock(&OCFS2_I(inode)->ip_lock);
+
+        ocfs2_journal_dirty(ctxt->handle, inode_bh);
 
         *ret_bh = new_bh;
         new_bh = NULL;
@@ -2326,13 +2928,13 @@ static int ocfs2_xattr_block_set(struct inode *inode,
                                  struct ocfs2_xattr_set_ctxt *ctxt)
 {
         struct buffer_head *new_bh = NULL;
-        handle_t *handle = ctxt->handle;
         struct ocfs2_xattr_block *xblk = NULL;
         int ret;
+        struct ocfs2_xa_loc loc;
 
         if (!xs->xattr_bh) {
-                ret = ocfs2_create_xattr_block(handle, inode, xs->inode_bh,
-                                               ctxt->meta_ac, &new_bh, 0);
+                ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt,
+                                               0, &new_bh);
                 if (ret) {
                         mlog_errno(ret);
                         goto end;
@@ -2348,21 +2950,25 @@ static int ocfs2_xattr_block_set(struct inode *inode,
                 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
 
         if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
-                /* Set extended attribute into external block */
-                ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
-                                            OCFS2_HAS_XATTR_FL);
-                if (!ret || ret != -ENOSPC)
-                        goto end;
+                ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh,
+                                              xs->not_found ? NULL : xs->here);
 
-                ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
-                if (ret)
+                ret = ocfs2_xa_set(&loc, xi, ctxt);
+                if (!ret)
+                        xs->here = loc.xl_entry;
+                else if (ret != -ENOSPC)
                         goto end;
+                else {
+                        ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
+                        if (ret)
+                                goto end;
+                }
         }
 
-        ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
+        if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)
+                ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
 
 end:
-
         return ret;
 }
 
@@ -2371,7 +2977,6 @@ static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
                                        struct ocfs2_xattr_info *xi,
                                        struct ocfs2_xattr_search *xs)
 {
-        u64 value_size;
         struct ocfs2_xattr_entry *last;
         int free, i;
         size_t min_offs = xs->end - xs->base;
@@ -2394,13 +2999,7 @@ static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
 
         BUG_ON(!xs->not_found);
 
-        if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
-                value_size = OCFS2_XATTR_ROOT_SIZE;
-        else
-                value_size = OCFS2_XATTR_SIZE(xi->value_len);
-
-        if (free >= sizeof(struct ocfs2_xattr_entry) +
-                   OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size)
+        if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi)))
                 return 1;
 
         return 0;
@@ -2424,7 +3023,7 @@ static int ocfs2_calc_xattr_set_need(struct inode *inode,
         char *base = NULL;
         int name_offset, name_len = 0;
         u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
-                                                    xi->value_len);
+                                                    xi->xi_value_len);
         u64 value_size;
 
         /*
@@ -2432,14 +3031,14 @@ static int ocfs2_calc_xattr_set_need(struct inode *inode,
          * No matter whether we replace an old one or add a new one,
          * we need this for writing.
          */
-        if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
+        if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
                 credits += new_clusters *
                            ocfs2_clusters_to_blocks(inode->i_sb, 1);
 
         if (xis->not_found && xbs->not_found) {
                 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
 
-                if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
+                if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
                         clusters_add += new_clusters;
                         credits += ocfs2_calc_extend_credits(inode->i_sb,
                                                         &def_xv.xv.xr_list,
@@ -2484,7 +3083,7 @@ static int ocfs2_calc_xattr_set_need(struct inode *inode,
          * The credits for removing the value tree will be extended
          * by ocfs2_remove_extent itself.
          */
-        if (!xi->value) {
+        if (!xi->xi_value) {
                 if (!ocfs2_xattr_is_local(xe))
                         credits += ocfs2_remove_extent_credits(inode->i_sb);
 
@@ -2514,7 +3113,7 @@ static int ocfs2_calc_xattr_set_need(struct inode *inode,
                 }
         }
 
-        if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
+        if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
                 /* the new values will be stored outside. */
                 u32 old_clusters = 0;
 
@@ -2547,9 +3146,10 @@ static int ocfs2_calc_xattr_set_need(struct inode *inode,
                  * value, we don't need any allocation, otherwise we have
                  * to guess metadata allocation.
                  */
-                if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
+                if ((ocfs2_xattr_is_local(xe) &&
+                     (value_size >= xi->xi_value_len)) ||
                     (!ocfs2_xattr_is_local(xe) &&
-                     OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
+                     OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len))
                         goto out;
         }
 
@@ -2639,7 +3239,7 @@ static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
 
         meta_add += extra_meta;
         mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, "
-             "credits = %d\n", xi->name, meta_add, clusters_add, *credits);
+             "credits = %d\n", xi->xi_name, meta_add, clusters_add, *credits);
 
         if (meta_add) {
                 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
@@ -2679,7 +3279,7 @@ static int __ocfs2_xattr_set_handle(struct inode *inode,
 {
         int ret = 0, credits, old_found;
 
-        if (!xi->value) {
+        if (!xi->xi_value) {
                 /* Remove existing extended attribute */
                 if (!xis->not_found)
                         ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
@@ -2693,8 +3293,8 @@ static int __ocfs2_xattr_set_handle(struct inode *inode,
                          * If succeed and that extended attribute existing in
                          * external block, then we will remove it.
                          */
-                        xi->value = NULL;
-                        xi->value_len = 0;
+                        xi->xi_value = NULL;
+                        xi->xi_value_len = 0;
 
                         old_found = xis->not_found;
                         xis->not_found = -ENODATA;
@@ -2722,8 +3322,8 @@ static int __ocfs2_xattr_set_handle(struct inode *inode,
                 } else if (ret == -ENOSPC) {
                         if (di->i_xattr_loc && !xbs->xattr_bh) {
                                 ret = ocfs2_xattr_block_find(inode,
-                                                             xi->name_index,
-                                                             xi->name, xbs);
+                                                             xi->xi_name_index,
+                                                             xi->xi_name, xbs);
                                 if (ret)
                                         goto out;
 
@@ -2762,8 +3362,8 @@ static int __ocfs2_xattr_set_handle(struct inode *inode,
                                  * If succeed and that extended attribute
                                  * existing in inode, we will remove it.
                                  */
-                                xi->value = NULL;
-                                xi->value_len = 0;
+                                xi->xi_value = NULL;
+                                xi->xi_value_len = 0;
                                 xbs->not_found = -ENODATA;
                                 ret = ocfs2_calc_xattr_set_need(inode,
                                                                 di,
@@ -2829,10 +3429,11 @@ int ocfs2_xattr_set_handle(handle_t *handle,
         int ret;
 
         struct ocfs2_xattr_info xi = {
-                .name_index = name_index,
-                .name = name,
-                .value = value,
-                .value_len = value_len,
+                .xi_name_index = name_index,
+                .xi_name = name,
+                .xi_name_len = strlen(name),
+                .xi_value = value,
+                .xi_value_len = value_len,
         };
 
         struct ocfs2_xattr_search xis = {
@@ -2912,10 +3513,11 @@ int ocfs2_xattr_set(struct inode *inode,
         struct ocfs2_refcount_tree *ref_tree = NULL;
 
         struct ocfs2_xattr_info xi = {
-                .name_index = name_index,
-                .name = name,
-                .value = value,
-                .value_len = value_len,
+                .xi_name_index = name_index,
+                .xi_name = name,
+                .xi_name_len = strlen(name),
+                .xi_value = value,
+                .xi_value_len = value_len,
         };
 
         struct ocfs2_xattr_search xis = {
@@ -3759,7 +4361,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
                                      struct ocfs2_xattr_bucket *bucket)
 {
         int ret, i;
-        size_t end, offset, len, value_len;
+        size_t end, offset, len;
         struct ocfs2_xattr_header *xh;
         char *entries, *buf, *bucket_buf = NULL;
         u64 blkno = bucket_blkno(bucket);
@@ -3813,12 +4415,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
         end = OCFS2_XATTR_BUCKET_SIZE;
         for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
                 offset = le16_to_cpu(xe->xe_name_offset);
-                if (ocfs2_xattr_is_local(xe))
-                        value_len = OCFS2_XATTR_SIZE(
-                                        le64_to_cpu(xe->xe_value_size));
-                else
-                        value_len = OCFS2_XATTR_ROOT_SIZE;
-                len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len;
+                len = namevalue_size_xe(xe);
 
                 /*
                  * We must make sure that the name/value pair
@@ -4007,7 +4604,7 @@ static int ocfs2_divide_xattr_bucket(struct inode *inode,
                                     int new_bucket_head)
 {
         int ret, i;
-        int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
+        int count, start, len, name_value_len = 0, name_offset = 0;
         struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
         struct ocfs2_xattr_header *xh;
         struct ocfs2_xattr_entry *xe;
@@ -4098,13 +4695,7 @@ static int ocfs2_divide_xattr_bucket(struct inode *inode,
         name_value_len = 0;
         for (i = 0; i < start; i++) {
                 xe = &xh->xh_entries[i];
-                xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
-                if (ocfs2_xattr_is_local(xe))
-                        xe_len +=
-                           OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
-                else
-                        xe_len += OCFS2_XATTR_ROOT_SIZE;
-                name_value_len += xe_len;
+                name_value_len += namevalue_size_xe(xe);
                 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
                         name_offset = le16_to_cpu(xe->xe_name_offset);
         }
@@ -4134,12 +4725,6 @@ static int ocfs2_divide_xattr_bucket(struct inode *inode,
         xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
         for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
                 xe = &xh->xh_entries[i];
-                xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
-                if (ocfs2_xattr_is_local(xe))
-                        xe_len +=
-                           OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
-                else
-                        xe_len += OCFS2_XATTR_ROOT_SIZE;
                 if (le16_to_cpu(xe->xe_name_offset) <
                     le16_to_cpu(xh->xh_free_start))
                         xh->xh_free_start = xe->xe_name_offset;
@@ -4751,195 +5336,6 @@ static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
 }
 
 /*
- * Handle the normal xattr set, including replace, delete and new.
- *
- * Note: "local" indicates the real data's locality. So we can't
- * just its bucket locality by its length.
- */
-static void ocfs2_xattr_set_entry_normal(struct inode *inode,
-                                         struct ocfs2_xattr_info *xi,
-                                         struct ocfs2_xattr_search *xs,
-                                         u32 name_hash,
-                                         int local)
-{
-        struct ocfs2_xattr_entry *last, *xe;
-        int name_len = strlen(xi->name);
-        struct ocfs2_xattr_header *xh = xs->header;
-        u16 count = le16_to_cpu(xh->xh_count), start;
-        size_t blocksize = inode->i_sb->s_blocksize;
-        char *val;
-        size_t offs, size, new_size;
-
-        last = &xh->xh_entries[count];
-        if (!xs->not_found) {
-                xe = xs->here;
-                offs = le16_to_cpu(xe->xe_name_offset);
-                if (ocfs2_xattr_is_local(xe))
-                        size = OCFS2_XATTR_SIZE(name_len) +
-                        OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
-                else
-                        size = OCFS2_XATTR_SIZE(name_len) +
-                        OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
-
-                /*
-                 * If the new value will be stored outside, xi->value has been
-                 * initalized as an empty ocfs2_xattr_value_root, and the same
-                 * goes with xi->value_len, so we can set new_size safely here.
-                 * See ocfs2_xattr_set_in_bucket.
-                 */
-                new_size = OCFS2_XATTR_SIZE(name_len) +
-                           OCFS2_XATTR_SIZE(xi->value_len);
-
-                le16_add_cpu(&xh->xh_name_value_len, -size);
-                if (xi->value) {
-                        if (new_size > size)
-                                goto set_new_name_value;
-
-                        /* Now replace the old value with new one. */
-                        if (local)
-                                xe->xe_value_size = cpu_to_le64(xi->value_len);
-                        else
-                                xe->xe_value_size = 0;
-
-                        val = ocfs2_xattr_bucket_get_val(inode,
-                                                         xs->bucket, offs);
-                        memset(val + OCFS2_XATTR_SIZE(name_len), 0,
-                               size - OCFS2_XATTR_SIZE(name_len));
-                        if (OCFS2_XATTR_SIZE(xi->value_len) > 0)
-                                memcpy(val + OCFS2_XATTR_SIZE(name_len),
-                                       xi->value, xi->value_len);
-
-                        le16_add_cpu(&xh->xh_name_value_len, new_size);
-                        ocfs2_xattr_set_local(xe, local);
-                        return;
-                } else {
-                        /*
-                         * Remove the old entry if there is more than one.
-                         * We don't remove the last entry so that we can
-                         * use it to indicate the hash value of the empty
-                         * bucket.
-                         */
-                        last -= 1;
-                        le16_add_cpu(&xh->xh_count, -1);
-                        if (xh->xh_count) {
-                                memmove(xe, xe + 1,
-                                        (void *)last - (void *)xe);
-                                memset(last, 0,
-                                       sizeof(struct ocfs2_xattr_entry));
-                        } else
-                                xh->xh_free_start =
-                                        cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
-
-                        return;
-                }
-        } else {
-                /* find a new entry for insert. */
-                int low = 0, high = count - 1, tmp;
-                struct ocfs2_xattr_entry *tmp_xe;
-
-                while (low <= high && count) {
-                        tmp = (low + high) / 2;
-                        tmp_xe = &xh->xh_entries[tmp];
-
-                        if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
-                                low = tmp + 1;
-                        else if (name_hash <
-                                 le32_to_cpu(tmp_xe->xe_name_hash))
-                                high = tmp - 1;
-                        else {
-                                low = tmp;
-                                break;
-                        }
-                }
-
-                xe = &xh->xh_entries[low];
-                if (low != count)
-                        memmove(xe + 1, xe, (void *)last - (void *)xe);
-
-                le16_add_cpu(&xh->xh_count, 1);
-                memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
-                xe->xe_name_hash = cpu_to_le32(name_hash);
-                xe->xe_name_len = name_len;
-                ocfs2_xattr_set_type(xe, xi->name_index);
-        }
-
-set_new_name_value:
-        /* Insert the new name+value. */
-        size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len);
-
-        /*
-         * We must make sure that the name/value pair
-         * exists in the same block.
-         */
-        offs = le16_to_cpu(xh->xh_free_start);
-        start = offs - size;
-
-        if (start >> inode->i_sb->s_blocksize_bits !=
-            (offs - 1) >> inode->i_sb->s_blocksize_bits) {
-                offs = offs - offs % blocksize;
-                xh->xh_free_start = cpu_to_le16(offs);
-        }
-
-        val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
-        xe->xe_name_offset = cpu_to_le16(offs - size);
-
-        memset(val, 0, size);
-        memcpy(val, xi->name, name_len);
-        memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len);
-
-        xe->xe_value_size = cpu_to_le64(xi->value_len);
-        ocfs2_xattr_set_local(xe, local);
-        xs->here = xe;
-        le16_add_cpu(&xh->xh_free_start, -size);
-        le16_add_cpu(&xh->xh_name_value_len, size);
-
-        return;
-}
-
-/*
- * Set the xattr entry in the specified bucket.
- * The bucket is indicated by xs->bucket and it should have the enough
- * space for the xattr insertion.
- */
-static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
-                                           handle_t *handle,
-                                           struct ocfs2_xattr_info *xi,
-                                           struct ocfs2_xattr_search *xs,
-                                           u32 name_hash,
-                                           int local)
-{
-        int ret;
-        u64 blkno;
-
-        mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
-             (unsigned long)xi->value_len, xi->name_index,
-             (unsigned long long)bucket_blkno(xs->bucket));
-
-        if (!xs->bucket->bu_bhs[1]) {
-                blkno = bucket_blkno(xs->bucket);
-                ocfs2_xattr_bucket_relse(xs->bucket);
-                ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
-                if (ret) {
-                        mlog_errno(ret);
-                        goto out;
-                }
-        }
-
-        ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
-                                                OCFS2_JOURNAL_ACCESS_WRITE);
-        if (ret < 0) {
-                mlog_errno(ret);
-                goto out;
-        }
-
-        ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
-        ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
-
-out:
-        return ret;
-}
-
-/*
  * Truncate the specified xe_off entry in xattr bucket.
  * bucket is indicated by header_bh and len is the new length.
  * Both the ocfs2_xattr_value_root and the entry will be updated here.
@@ -5009,66 +5405,6 @@ out:
         return ret;
 }
 
-static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
-                                        struct ocfs2_xattr_search *xs,
-                                        int len,
-                                        struct ocfs2_xattr_set_ctxt *ctxt)
-{
-        int ret, offset;
-        struct ocfs2_xattr_entry *xe = xs->here;
-        struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
-
-        BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
-
-        offset = xe - xh->xh_entries;
-        ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
-                                                offset, len, ctxt);
-        if (ret)
-                mlog_errno(ret);
-
-        return ret;
-}
-
-static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
-                                                handle_t *handle,
-                                                struct ocfs2_xattr_search *xs,
-                                                char *val,
-                                                int value_len)
-{
-        int ret, offset, block_off;
-        struct ocfs2_xattr_value_root *xv;
-        struct ocfs2_xattr_entry *xe = xs->here;
-        struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
-        void *base;
-        struct ocfs2_xattr_value_buf vb = {
-                .vb_access = ocfs2_journal_access,
-        };
-
-        BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
-
-        ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, xh,
-                                                xe - xh->xh_entries,
-                                                &block_off,
-                                                &offset);
-        if (ret) {
-                mlog_errno(ret);
-                goto out;
-        }
-
-        base = bucket_block(xs->bucket, block_off);
-        xv = (struct ocfs2_xattr_value_root *)(base + offset +
-                 OCFS2_XATTR_SIZE(xe->xe_name_len));
-
-        vb.vb_xv = xv;
-        vb.vb_bh = xs->bucket->bu_bhs[block_off];
-        ret = __ocfs2_xattr_set_value_outside(inode, handle,
-                                              &vb, val, value_len);
-        if (ret)
-                mlog_errno(ret);
-out:
-        return ret;
-}
-
 static int ocfs2_rm_xattr_cluster(struct inode *inode,
                                   struct buffer_head *root_bh,
                                   u64 blkno,
@@ -5167,128 +5503,6 @@ out:
         return ret;
 }
 
-static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
-                                         handle_t *handle,
-                                         struct ocfs2_xattr_search *xs)
-{
-        struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
-        struct ocfs2_xattr_entry *last = &xh->xh_entries[
-                                                le16_to_cpu(xh->xh_count) - 1];
-        int ret = 0;
-
-        ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
-                                                OCFS2_JOURNAL_ACCESS_WRITE);
-        if (ret) {
-                mlog_errno(ret);
-                return;
-        }
-
-        /* Remove the old entry. */
-        memmove(xs->here, xs->here + 1,
-                (void *)last - (void *)xs->here);
-        memset(last, 0, sizeof(struct ocfs2_xattr_entry));
-        le16_add_cpu(&xh->xh_count, -1);
-
-        ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
-}
-
-/*
- * Set the xattr name/value in the bucket specified in xs.
- *
- * As the new value in xi may be stored in the bucket or in an outside cluster,
- * we divide the whole process into 3 steps:
- * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
- * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
- * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
- * 4. If the clusters for the new outside value can't be allocated, we need
- *    to free the xattr we allocated in set.
- */
-static int ocfs2_xattr_set_in_bucket(struct inode *inode,
-                                     struct ocfs2_xattr_info *xi,
-                                     struct ocfs2_xattr_search *xs,
-                                     struct ocfs2_xattr_set_ctxt *ctxt)
-{
-        int ret, local = 1;
-        size_t value_len;
-        char *val = (char *)xi->value;
-        struct ocfs2_xattr_entry *xe = xs->here;
-        u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name,
-                                              strlen(xi->name));
-
-        if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
-                /*
-                 * We need to truncate the xattr storage first.
-                 *
-                 * If both the old and new value are stored to
-                 * outside block, we only need to truncate
-                 * the storage and then set the value outside.
-                 *
-                 * If the new value should be stored within block,
-                 * we should free all the outside block first and
-                 * the modification to the xattr block will be done
-                 * by following steps.
-                 */
-                if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
-                        value_len = xi->value_len;
-                else
-                        value_len = 0;
-
-                ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
-                                                           value_len,
-                                                           ctxt);
-                if (ret)
-                        goto out;
-
-                if (value_len)
-                        goto set_value_outside;
-        }
-
-        value_len = xi->value_len;
-        /* So we have to handle the inside block change now. */
-        if (value_len > OCFS2_XATTR_INLINE_SIZE) {
-                /*
-                 * If the new value will be stored outside of block,
-                 * initalize a new empty value root and insert it first.
-                 */
-                local = 0;
-                xi->value = &def_xv;
-                xi->value_len = OCFS2_XATTR_ROOT_SIZE;
-        }
-
-        ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
-                                              name_hash, local);
-        if (ret) {
-                mlog_errno(ret);
-                goto out;
-        }
-
-        if (value_len <= OCFS2_XATTR_INLINE_SIZE)
-                goto out;
-
-        /* allocate the space now for the outside block storage. */
-        ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
-                                                   value_len, ctxt);
-        if (ret) {
-                mlog_errno(ret);
-
-                if (xs->not_found) {
-                        /*
-                         * We can't allocate enough clusters for outside
-                         * storage and we have allocated xattr already,
-                         * so need to remove it.
-                         */
-                        ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
-                }
-                goto out;
-        }
-
-set_value_outside:
-        ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
-                                                   xs, val, value_len);
-out:
-        return ret;
-}
-
 /*
  * check whether the xattr bucket is filled up with the same hash value.
  * If we want to insert the xattr with the same hash, return -ENOSPC.
@@ -5317,156 +5531,116 @@ static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
         return 0;
 }
 
-static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
-                                             struct ocfs2_xattr_info *xi,
-                                             struct ocfs2_xattr_search *xs,
-                                             struct ocfs2_xattr_set_ctxt *ctxt)
+/*
+ * Try to set the entry in the current bucket.  If we fail, the caller
+ * will handle getting us another bucket.
+ */
+static int ocfs2_xattr_set_entry_bucket(struct inode *inode,
+                                        struct ocfs2_xattr_info *xi,
+                                        struct ocfs2_xattr_search *xs,
+                                        struct ocfs2_xattr_set_ctxt *ctxt)
 {
-        struct ocfs2_xattr_header *xh;
-        struct ocfs2_xattr_entry *xe;
-        u16 count, header_size, xh_free_start;
-        int free, max_free, need, old;
-        size_t value_size = 0, name_len = strlen(xi->name);
-        size_t blocksize = inode->i_sb->s_blocksize;
-        int ret, allocation = 0;
-
-        mlog_entry("Set xattr %s in xattr index block\n", xi->name);
-
-try_again:
-        xh = xs->header;
-        count = le16_to_cpu(xh->xh_count);
-        xh_free_start = le16_to_cpu(xh->xh_free_start);
-        header_size = sizeof(struct ocfs2_xattr_header) +
-                        count * sizeof(struct ocfs2_xattr_entry);
-        max_free = OCFS2_XATTR_BUCKET_SIZE - header_size -
-                le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP;
-
-        mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
-                        "of %u which exceed block size\n",
-                        (unsigned long long)bucket_blkno(xs->bucket),
-                        header_size);
+        int ret;
+        struct ocfs2_xa_loc loc;
 
-        if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE)
-                value_size = OCFS2_XATTR_ROOT_SIZE;
-        else if (xi->value)
-                value_size = OCFS2_XATTR_SIZE(xi->value_len);
+        mlog_entry("Set xattr %s in xattr bucket\n", xi->xi_name);
 
-        if (xs->not_found)
-                need = sizeof(struct ocfs2_xattr_entry) +
-                        OCFS2_XATTR_SIZE(name_len) + value_size;
-        else {
-                need = value_size + OCFS2_XATTR_SIZE(name_len);
+        ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
+                                       xs->not_found ? NULL : xs->here);
+        ret = ocfs2_xa_set(&loc, xi, ctxt);
+        if (!ret) {
+                xs->here = loc.xl_entry;
+                goto out;
+        }
+        if (ret != -ENOSPC) {
+                mlog_errno(ret);
+                goto out;
+        }
 
-                /*
-                 * We only replace the old value if the new length is smaller
-                 * than the old one. Otherwise we will allocate new space in the
-                 * bucket to store it.
-                 */
-                xe = xs->here;
-                if (ocfs2_xattr_is_local(xe))
-                        old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
-                else
-                        old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
+        /* Ok, we need space.  Let's try defragmenting the bucket. */
+        ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
+                                        xs->bucket);
+        if (ret) {
+                mlog_errno(ret);
+                goto out;
+        }
 
-                if (old >= value_size)
-                        need = 0;
+        ret = ocfs2_xa_set(&loc, xi, ctxt);
+        if (!ret) {
+                xs->here = loc.xl_entry;
+                goto out;
         }
+        if (ret != -ENOSPC)
+                mlog_errno(ret);
 
-        free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP;
-        /*
-         * We need to make sure the new name/value pair
-         * can exist in the same block.
-         */
-        if (xh_free_start % blocksize < need)
-                free -= xh_free_start % blocksize;
-
-        mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
-             "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
-             " %u\n", xs->not_found,
-             (unsigned long long)bucket_blkno(xs->bucket),
-             free, need, max_free, le16_to_cpu(xh->xh_free_start),
-             le16_to_cpu(xh->xh_name_value_len));
-
-        if (free < need ||
-            (xs->not_found &&
-             count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
-                if (need <= max_free &&
-                    count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
-                        /*
-                         * We can create the space by defragment. Since only the
-                         * name/value will be moved, the xe shouldn't be changed
-                         * in xs.
-                         */
-                        ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
-                                                        xs->bucket);
-                        if (ret) {
-                                mlog_errno(ret);
-                                goto out;
-                        }
 
-                        xh_free_start = le16_to_cpu(xh->xh_free_start);
-                        free = xh_free_start - header_size
-                                - OCFS2_XATTR_HEADER_GAP;
-                        if (xh_free_start % blocksize < need)
-                                free -= xh_free_start % blocksize;
+out:
+        mlog_exit(ret);
+        return ret;
+}
 
-                        if (free >= need)
-                                goto xattr_set;
+static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
+                                             struct ocfs2_xattr_info *xi,
+                                             struct ocfs2_xattr_search *xs,
+                                             struct ocfs2_xattr_set_ctxt *ctxt)
+{
+        int ret;
 
-                        mlog(0, "Can't get enough space for xattr insert by "
-                             "defragment. Need %u bytes, but we have %d, so "
-                             "allocate new bucket for it.\n", need, free);
-                }
+        mlog_entry("Set xattr %s in xattr index block\n", xi->xi_name);
 
-                /*
-                 * We have to add new buckets or clusters and one
-                 * allocation should leave us enough space for insert.
-                 */
-                BUG_ON(allocation);
+        ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
+        if (!ret)
+                goto out;
+        if (ret != -ENOSPC) {
+                mlog_errno(ret);
+                goto out;
+        }
 
-                /*
-                 * We do not allow for overlapping ranges between buckets. And
-                 * the maximum number of collisions we will allow for then is
-                 * one bucket's worth, so check it here whether we need to
-                 * add a new bucket for the insert.
-                 */
-                ret = ocfs2_check_xattr_bucket_collision(inode,
-                                                         xs->bucket,
-                                                         xi->name);
-                if (ret) {
-                        mlog_errno(ret);
-                        goto out;
-                }
+        /* Ack, need more space.  Let's try to get another bucket! */
 
-                ret = ocfs2_add_new_xattr_bucket(inode,
-                                                 xs->xattr_bh,
+        /*
+         * We do not allow for overlapping ranges between buckets. And
+         * the maximum number of collisions we will allow for then is
+         * one bucket's worth, so check it here whether we need to
+         * add a new bucket for the insert.
+         */
+        ret = ocfs2_check_xattr_bucket_collision(inode,
                                                  xs->bucket,
-                                                 ctxt);
-                if (ret) {
-                        mlog_errno(ret);
-                        goto out;
-                }
+                                                 xi->xi_name);
+        if (ret) {
+                mlog_errno(ret);
+                goto out;
+        }
 
-                /*
-                 * ocfs2_add_new_xattr_bucket() will have updated
-                 * xs->bucket if it moved, but it will not have updated
-                 * any of the other search fields.  Thus, we drop it and
-                 * re-search.  Everything should be cached, so it'll be
-                 * quick.
-                 */
-                ocfs2_xattr_bucket_relse(xs->bucket);
-                ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
-                                                   xi->name_index,
-                                                   xi->name, xs);
-                if (ret && ret != -ENODATA)
-                        goto out;
-                xs->not_found = ret;
-                allocation = 1;
-                goto try_again;
+        ret = ocfs2_add_new_xattr_bucket(inode,
+                                         xs->xattr_bh,
+                                         xs->bucket,
+                                         ctxt);
+        if (ret) {
+                mlog_errno(ret);
+                goto out;
         }
 
-xattr_set:
-        ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
+        /*
+         * ocfs2_add_new_xattr_bucket() will have updated
+         * xs->bucket if it moved, but it will not have updated
+         * any of the other search fields.  Thus, we drop it and
+         * re-search.  Everything should be cached, so it'll be
+         * quick.
+         */
+        ocfs2_xattr_bucket_relse(xs->bucket);
+        ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
+                                           xi->xi_name_index,
+                                           xi->xi_name, xs);
+        if (ret && ret != -ENODATA)
+                goto out;
+        xs->not_found = ret;
+
+        /* Ok, we have a new bucket, let's try again */
+        ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
+        if (ret && (ret != -ENOSPC))
+                mlog_errno(ret);
+
 out:
         mlog_exit(ret);
         return ret;
@@ -5678,7 +5852,7 @@ static int ocfs2_prepare_refcount_xattr(struct inode *inode,
          * refcount tree, and make the original extent become 3. So we will need
          * 2 * cluster more extent recs at most.
          */
-        if (!xi->value || xi->value_len <= OCFS2_XATTR_INLINE_SIZE) {
+        if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) {
 
                 ret = ocfs2_refcounted_xattr_delete_need(inode,
                                                          &(*ref_tree)->rf_ci,
@@ -6354,9 +6528,11 @@ static int ocfs2_create_empty_xattr_block(struct inode *inode,
                                           int indexed)
 {
         int ret;
-        handle_t *handle;
         struct ocfs2_alloc_context *meta_ac;
         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+        struct ocfs2_xattr_set_ctxt ctxt = {
+                .meta_ac = meta_ac,
+        };
 
         ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
         if (ret < 0) {
@@ -6364,21 +6540,21 @@ static int ocfs2_create_empty_xattr_block(struct inode *inode,
                 return ret;
         }
 
-        handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
-        if (IS_ERR(handle)) {
-                ret = PTR_ERR(handle);
+        ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
+        if (IS_ERR(ctxt.handle)) {
+                ret = PTR_ERR(ctxt.handle);
                 mlog_errno(ret);
                 goto out;
         }
 
         mlog(0, "create new xattr block for inode %llu, index = %d\n",
              (unsigned long long)fe_bh->b_blocknr, indexed);
-        ret = ocfs2_create_xattr_block(handle, inode, fe_bh,
-                                       meta_ac, ret_bh, indexed);
+        ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed,
+                                       ret_bh);
         if (ret)
                 mlog_errno(ret);
 
-        ocfs2_commit_trans(osb, handle);
+        ocfs2_commit_trans(osb, ctxt.handle);
 out:
         ocfs2_free_alloc_context(meta_ac);
         return ret;
diff --git a/fs/open.c b/fs/open.c
index 040cef72bc00..e0b2d88b0380 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -271,7 +271,7 @@ static long do_sys_truncate(const char __user *pathname, loff_t length)
          * Make sure that there are no leases.  get_write_access() protects
          * against the truncate racing with a lease-granting setlease().
          */
-        error = break_lease(inode, FMODE_WRITE);
+        error = break_lease(inode, O_WRONLY);
         if (error)
                 goto put_write_and_out;
 
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 64bc8998ac9a..e8865c11777f 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -412,9 +412,10 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
         pdev = part_to_dev(p);
 
         p->start_sect = start;
-        p->alignment_offset = queue_sector_alignment_offset(disk->queue, start);
-        p->discard_alignment = queue_sector_discard_alignment(disk->queue,
-                                                              start);
+        p->alignment_offset =
+                queue_limit_alignment_offset(&disk->queue->limits, start);
+        p->discard_alignment =
+                queue_limit_discard_alignment(&disk->queue->limits, start);
         p->nr_sects = len;
         p->partno = partno;
         p->policy = get_disk_ro(disk);
diff --git a/fs/pnode.c b/fs/pnode.c
index 8d5f392ec3d3..5cc564a83149 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -86,7 +86,7 @@ static int do_make_slave(struct vfsmount *mnt)
 
         /*
          * slave 'mnt' to a peer mount that has the
-         * same root dentry. If none is available than
+         * same root dentry. If none is available then
          * slave it to anything that is available.
          */
         while ((peer_mnt = next_peer(peer_mnt)) != mnt &&
@@ -147,6 +147,11 @@ void change_mnt_propagation(struct vfsmount *mnt, int type)
  * get the next mount in the propagation tree.
  * @m: the mount seen last
  * @origin: the original mount from where the tree walk initiated
+ *
+ * Note that peer groups form contiguous segments of slave lists.
+ * We rely on that in get_source() to be able to find out if
+ * vfsmount found while iterating with propagation_next() is
+ * a peer of one we'd found earlier.
  */
 static struct vfsmount *propagation_next(struct vfsmount *m,
                                          struct vfsmount *origin)
@@ -186,10 +191,6 @@ static struct vfsmount *get_source(struct vfsmount *dest,
 {
         struct vfsmount *p_last_src = NULL;
         struct vfsmount *p_last_dest = NULL;
-        *type = CL_PROPAGATION;
-
-        if (IS_MNT_SHARED(dest))
-                *type |= CL_MAKE_SHARED;
 
         while (last_dest != dest->mnt_master) {
                 p_last_dest = last_dest;
@@ -202,13 +203,18 @@ static struct vfsmount *get_source(struct vfsmount *dest,
                 do {
                         p_last_dest = next_peer(p_last_dest);
                 } while (IS_MNT_NEW(p_last_dest));
+                /* is that a peer of the earlier? */
+                if (dest == p_last_dest) {
+                        *type = CL_MAKE_SHARED;
+                        return p_last_src;
+                }
         }
-
-        if (dest != p_last_dest) {
-                *type |= CL_SLAVE;
-                return last_src;
-        } else
-                return p_last_src;
+        /* slave of the earlier, then */
+        *type = CL_SLAVE;
+        /* beginning of peer group among the slaves? */
+        if (IS_MNT_SHARED(dest))
+                *type |= CL_MAKE_SHARED;
+        return last_src;
 }
 
 /*
diff --git a/fs/pnode.h b/fs/pnode.h
index 958665d662af..1ea4ae1efcd3 100644
--- a/fs/pnode.h
+++ b/fs/pnode.h
@@ -21,12 +21,11 @@
 #define CL_SLAVE                0x02
 #define CL_COPY_ALL             0x04
 #define CL_MAKE_SHARED          0x08
-#define CL_PROPAGATION          0x10
-#define CL_PRIVATE              0x20
+#define CL_PRIVATE              0x10
 
 static inline void set_mnt_shared(struct vfsmount *mnt)
 {
-        mnt->mnt_flags &= ~MNT_PNODE_MASK;
+        mnt->mnt_flags &= ~MNT_SHARED_MASK;
         mnt->mnt_flags |= MNT_SHARED;
 }
 
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 13b5d0708175..18e20feee251 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -270,7 +270,9 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
                 blocked = p->blocked;
                 collect_sigign_sigcatch(p, &ignored, &caught);
                 num_threads = atomic_read(&p->signal->count);
+                rcu_read_lock();  /* FIXME: is this correct? */
                 qsize = atomic_read(&__task_cred(p)->user->sigpending);
+                rcu_read_unlock();
                 qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
                 unlock_task_sighand(p, &flags);
         }
diff --git a/fs/proc/base.c b/fs/proc/base.c
index e42bbd843ed1..a7310841c831 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -647,17 +647,11 @@ static int mounts_release(struct inode *inode, struct file *file)
 static unsigned mounts_poll(struct file *file, poll_table *wait)
 {
         struct proc_mounts *p = file->private_data;
-        struct mnt_namespace *ns = p->ns;
         unsigned res = POLLIN | POLLRDNORM;
 
-        poll_wait(file, &ns->poll, wait);
-
-        spin_lock(&vfsmount_lock);
-        if (p->event != ns->event) {
-                p->event = ns->event;
+        poll_wait(file, &p->ns->poll, wait);
+        if (mnt_had_events(p))
                 res |= POLLERR | POLLPRI;
-        }
-        spin_unlock(&vfsmount_lock);
 
         return res;
 }
@@ -1095,8 +1089,12 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
         if (!capable(CAP_AUDIT_CONTROL))
                 return -EPERM;
 
-        if (current != pid_task(proc_pid(inode), PIDTYPE_PID))
+        rcu_read_lock();
+        if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) {
+                rcu_read_unlock();
                 return -EPERM;
+        }
+        rcu_read_unlock();
 
         if (count >= PAGE_SIZE)
                 count = PAGE_SIZE - 1;
@@ -2369,16 +2367,30 @@ static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
         struct pid_namespace *ns = dentry->d_sb->s_fs_info;
         pid_t tgid = task_tgid_nr_ns(current, ns);
-        char tmp[PROC_NUMBUF];
-        if (!tgid)
-                return ERR_PTR(-ENOENT);
-        sprintf(tmp, "%d", task_tgid_nr_ns(current, ns));
-        return ERR_PTR(vfs_follow_link(nd,tmp));
+        char *name = ERR_PTR(-ENOENT);
+        if (tgid) {
+                name = __getname();
+                if (!name)
+                        name = ERR_PTR(-ENOMEM);
+                else
+                        sprintf(name, "%d", tgid);
+        }
+        nd_set_link(nd, name);
+        return NULL;
+}
+
+static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd,
+                                void *cookie)
+{
+        char *s = nd_get_link(nd);
+        if (!IS_ERR(s))
+                __putname(s);
 }
 
 static const struct inode_operations proc_self_inode_operations = {
         .readlink       = proc_self_readlink,
         .follow_link    = proc_self_follow_link,
+        .put_link       = proc_self_put_link,
 };
 
 /*
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 480cb1065eec..9580abeadeb3 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -662,6 +662,7 @@ struct proc_dir_entry *proc_symlink(const char *name,
         }
         return ent;
 }
+EXPORT_SYMBOL(proc_symlink);
 
 struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
                 struct proc_dir_entry *parent)
@@ -700,6 +701,7 @@ struct proc_dir_entry *proc_mkdir(const char *name,
 {
         return proc_mkdir_mode(name, S_IRUGO | S_IXUGO, parent);
 }
+EXPORT_SYMBOL(proc_mkdir);
 
 struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
                                          struct proc_dir_entry *parent)
@@ -728,6 +730,7 @@ struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
         }
         return ent;
 }
+EXPORT_SYMBOL(create_proc_entry);
 
 struct proc_dir_entry *proc_create_data(const char *name, mode_t mode,
                                         struct proc_dir_entry *parent,
@@ -762,6 +765,7 @@ out_free:
 out:
         return NULL;
 }
+EXPORT_SYMBOL(proc_create_data);
 
 static void free_proc_entry(struct proc_dir_entry *de)
 {
@@ -853,3 +857,4 @@ continue_removing:
                         de->parent->name, de->name, de->subdir->name);
         pde_put(de);
 }
+EXPORT_SYMBOL(remove_proc_entry);
diff --git a/fs/proc/kmsg.c b/fs/proc/kmsg.c
index 7ca78346d3f0..cfe90a48a6e8 100644
--- a/fs/proc/kmsg.c
+++ b/fs/proc/kmsg.c
@@ -12,37 +12,37 @@
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
 #include <linux/fs.h>
+#include <linux/syslog.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
 extern wait_queue_head_t log_wait;
 
-extern int do_syslog(int type, char __user *bug, int count);
-
 static int kmsg_open(struct inode * inode, struct file * file)
 {
-        return do_syslog(1,NULL,0);
+        return do_syslog(SYSLOG_ACTION_OPEN, NULL, 0, SYSLOG_FROM_FILE);
 }
 
 static int kmsg_release(struct inode * inode, struct file * file)
 {
-        (void) do_syslog(0,NULL,0);
+        (void) do_syslog(SYSLOG_ACTION_CLOSE, NULL, 0, SYSLOG_FROM_FILE);
         return 0;
 }
 
 static ssize_t kmsg_read(struct file *file, char __user *buf,
                          size_t count, loff_t *ppos)
 {
-        if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
+        if ((file->f_flags & O_NONBLOCK) &&
+            !do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_FILE))
                 return -EAGAIN;
-        return do_syslog(2, buf, count);
+        return do_syslog(SYSLOG_ACTION_READ, buf, count, SYSLOG_FROM_FILE);
 }
 
 static unsigned int kmsg_poll(struct file *file, poll_table *wait)
 {
         poll_wait(file, &log_wait, wait);
-        if (do_syslog(9, NULL, 0))
+        if (do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_FILE))
                 return POLLIN | POLLRDNORM;
         return 0;
 }
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
index 123257bb356b..f8650dce74fb 100644
--- a/fs/proc/proc_devtree.c
+++ b/fs/proc/proc_devtree.c
@@ -10,16 +10,19 @@
 #include <linux/seq_file.h>
 #include <linux/stat.h>
 #include <linux/string.h>
+#include <linux/of.h>
+#include <linux/module.h>
 #include <asm/prom.h>
 #include <asm/uaccess.h>
 #include "internal.h"
 
-#ifndef HAVE_ARCH_DEVTREE_FIXUPS
 static inline void set_node_proc_entry(struct device_node *np,
                                        struct proc_dir_entry *de)
 {
-}
+#ifdef HAVE_ARCH_DEVTREE_FIXUPS
+        np->pde = de;
 #endif
+}
 
 static struct proc_dir_entry *proc_device_tree;
 
diff --git a/fs/proc/root.c b/fs/proc/root.c
index b080b791d9e3..757c069f2a65 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -220,9 +220,3 @@ void pid_ns_release_proc(struct pid_namespace *ns)
 {
         mntput(ns->proc_mnt);
 }
-
-EXPORT_SYMBOL(proc_symlink);
-EXPORT_SYMBOL(proc_mkdir);
-EXPORT_SYMBOL(create_proc_entry);
-EXPORT_SYMBOL(proc_create_data);
-EXPORT_SYMBOL(remove_proc_entry);
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 9087b10209e6..2df0f5c7c60b 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1497,9 +1497,11 @@ struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key)
 
         args.objectid = key->on_disk_key.k_objectid;
         args.dirid = key->on_disk_key.k_dir_id;
+        reiserfs_write_unlock(s);
         inode = iget5_locked(s, key->on_disk_key.k_objectid,
                              reiserfs_find_actor, reiserfs_init_locked_inode,
                              (void *)(&args));
+        reiserfs_write_lock(s);
         if (!inode)
                 return ERR_PTR(-ENOMEM);
 
diff --git a/fs/seq_file.c b/fs/seq_file.c
index eae7d9dbf3ff..5afd554efad3 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -674,7 +674,6 @@ struct list_head *seq_list_start(struct list_head *head, loff_t pos)
 
         return NULL;
 }
-
 EXPORT_SYMBOL(seq_list_start);
 
 struct list_head *seq_list_start_head(struct list_head *head, loff_t pos)
@@ -684,7 +683,6 @@ struct list_head *seq_list_start_head(struct list_head *head, loff_t pos)
 
         return seq_list_start(head, pos - 1);
 }
-
 EXPORT_SYMBOL(seq_list_start_head);
 
 struct list_head *seq_list_next(void *v, struct list_head *head, loff_t *ppos)
@@ -695,5 +693,131 @@ struct list_head *seq_list_next(void *v, struct list_head *head, loff_t *ppos)
         ++*ppos;
         return lh == head ? NULL : lh;
 }
-
 EXPORT_SYMBOL(seq_list_next);
+
+/**
+ * seq_hlist_start - start an iteration of a hlist
+ * @head: the head of the hlist
+ * @pos:  the start position of the sequence
+ *
+ * Called at seq_file->op->start().
+ */
+struct hlist_node *seq_hlist_start(struct hlist_head *head, loff_t pos)
+{
+        struct hlist_node *node;
+
+        hlist_for_each(node, head)
+                if (pos-- == 0)
+                        return node;
+        return NULL;
+}
+EXPORT_SYMBOL(seq_hlist_start);
+
+/**
+ * seq_hlist_start_head - start an iteration of a hlist
+ * @head: the head of the hlist
+ * @pos:  the start position of the sequence
+ *
+ * Called at seq_file->op->start(). Call this function if you want to
+ * print a header at the top of the output.
+ */
+struct hlist_node *seq_hlist_start_head(struct hlist_head *head, loff_t pos)
+{
+        if (!pos)
+                return SEQ_START_TOKEN;
+
+        return seq_hlist_start(head, pos - 1);
+}
+EXPORT_SYMBOL(seq_hlist_start_head);
+
+/**
+ * seq_hlist_next - move to the next position of the hlist
+ * @v:    the current iterator
+ * @head: the head of the hlist
+ * @pos:  the current posision
+ *
+ * Called at seq_file->op->next().
+ */
+struct hlist_node *seq_hlist_next(void *v, struct hlist_head *head,
+                                  loff_t *ppos)
+{
+        struct hlist_node *node = v;
+
+        ++*ppos;
+        if (v == SEQ_START_TOKEN)
+                return head->first;
+        else
+                return node->next;
+}
+EXPORT_SYMBOL(seq_hlist_next);
+
+/**
+ * seq_hlist_start_rcu - start an iteration of a hlist protected by RCU
+ * @head: the head of the hlist
+ * @pos:  the start position of the sequence
+ *
+ * Called at seq_file->op->start().
+ *
+ * This list-traversal primitive may safely run concurrently with
+ * the _rcu list-mutation primitives such as hlist_add_head_rcu()
+ * as long as the traversal is guarded by rcu_read_lock().
+ */
+struct hlist_node *seq_hlist_start_rcu(struct hlist_head *head,
+                                       loff_t pos)
+{
+        struct hlist_node *node;
+
+        __hlist_for_each_rcu(node, head)
+                if (pos-- == 0)
+                        return node;
+        return NULL;
+}
+EXPORT_SYMBOL(seq_hlist_start_rcu);
+
+/**
+ * seq_hlist_start_head_rcu - start an iteration of a hlist protected by RCU
+ * @head: the head of the hlist
+ * @pos:  the start position of the sequence
+ *
+ * Called at seq_file->op->start(). Call this function if you want to
+ * print a header at the top of the output.
+ *
+ * This list-traversal primitive may safely run concurrently with
+ * the _rcu list-mutation primitives such as hlist_add_head_rcu()
+ * as long as the traversal is guarded by rcu_read_lock().
+ */
+struct hlist_node *seq_hlist_start_head_rcu(struct hlist_head *head,
+                                            loff_t pos)
+{
+        if (!pos)
+                return SEQ_START_TOKEN;
+
+        return seq_hlist_start_rcu(head, pos - 1);
+}
+EXPORT_SYMBOL(seq_hlist_start_head_rcu);
+
+/**
+ * seq_hlist_next_rcu - move to the next position of the hlist protected by RCU
+ * @v:    the current iterator
+ * @head: the head of the hlist
+ * @pos:  the current posision
+ *
+ * Called at seq_file->op->next().
+ *
+ * This list-traversal primitive may safely run concurrently with
+ * the _rcu list-mutation primitives such as hlist_add_head_rcu()
+ * as long as the traversal is guarded by rcu_read_lock().
+ */
+struct hlist_node *seq_hlist_next_rcu(void *v,
+                                      struct hlist_head *head,
+                                      loff_t *ppos)
+{
+        struct hlist_node *node = v;
+
+        ++*ppos;
+        if (v == SEQ_START_TOKEN)
+                return rcu_dereference(head->first);
+        else
+                return rcu_dereference(node->next);
+}
+EXPORT_SYMBOL(seq_hlist_next_rcu);
diff --git a/fs/squashfs/Makefile b/fs/squashfs/Makefile
index 70e3244fa30f..df8a19ef870d 100644
--- a/fs/squashfs/Makefile
+++ b/fs/squashfs/Makefile
@@ -4,4 +4,4 @@
 
 obj-$(CONFIG_SQUASHFS) += squashfs.o
 squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o
-squashfs-y += namei.o super.o symlink.o
+squashfs-y += namei.o super.o symlink.o zlib_wrapper.o decompressor.o
diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index 2a7960310349..1cb0d81b164b 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -29,15 +29,14 @@
 #include <linux/fs.h>
 #include <linux/vfs.h>
 #include <linux/slab.h>
-#include <linux/mutex.h>
 #include <linux/string.h>
 #include <linux/buffer_head.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
 #include "squashfs_fs_i.h"
 #include "squashfs.h"
+#include "decompressor.h"
 
 /*
  * Read the metadata block length, this is stored in the first two
@@ -153,72 +152,10 @@ int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
         }
 
         if (compressed) {
-                int zlib_err = 0, zlib_init = 0;
-
-                /*
-                 * Uncompress block.
-                 */
-
-                mutex_lock(&msblk->read_data_mutex);
-
-                msblk->stream.avail_out = 0;
-                msblk->stream.avail_in = 0;
-
-                bytes = length;
-                do {
-                        if (msblk->stream.avail_in == 0 && k < b) {
-                                avail = min(bytes, msblk->devblksize - offset);
-                                bytes -= avail;
-                                wait_on_buffer(bh[k]);
-                                if (!buffer_uptodate(bh[k]))
-                                        goto release_mutex;
-
-                                if (avail == 0) {
-                                        offset = 0;
-                                        put_bh(bh[k++]);
-                                        continue;
-                                }
-
-                                msblk->stream.next_in = bh[k]->b_data + offset;
-                                msblk->stream.avail_in = avail;
-                                offset = 0;
-                        }
-
-                        if (msblk->stream.avail_out == 0 && page < pages) {
-                                msblk->stream.next_out = buffer[page++];
-                                msblk->stream.avail_out = PAGE_CACHE_SIZE;
-                        }
-
-                        if (!zlib_init) {
-                                zlib_err = zlib_inflateInit(&msblk->stream);
-                                if (zlib_err != Z_OK) {
-                                        ERROR("zlib_inflateInit returned"
-                                                " unexpected result 0x%x,"
-                                                " srclength %d\n", zlib_err,
-                                                srclength);
-                                        goto release_mutex;
-                                }
-                                zlib_init = 1;
-                        }
-
-                        zlib_err = zlib_inflate(&msblk->stream, Z_SYNC_FLUSH);
-
-                        if (msblk->stream.avail_in == 0 && k < b)
-                                put_bh(bh[k++]);
-                } while (zlib_err == Z_OK);
-
-                if (zlib_err != Z_STREAM_END) {
-                        ERROR("zlib_inflate error, data probably corrupt\n");
-                        goto release_mutex;
-                }
-
-                zlib_err = zlib_inflateEnd(&msblk->stream);
-                if (zlib_err != Z_OK) {
-                        ERROR("zlib_inflate error, data probably corrupt\n");
-                        goto release_mutex;
-                }
-                length = msblk->stream.total_out;
-                mutex_unlock(&msblk->read_data_mutex);
+                length = squashfs_decompress(msblk, buffer, bh, b, offset,
+                         length, srclength, pages);
+                if (length < 0)
+                        goto read_failure;
         } else {
                 /*
                  * Block is uncompressed.
@@ -255,9 +192,6 @@ int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
         kfree(bh);
         return length;
 
-release_mutex:
-        mutex_unlock(&msblk->read_data_mutex);
-
 block_release:
         for (; k < b; k++)
                 put_bh(bh[k]);
diff --git a/fs/squashfs/cache.c b/fs/squashfs/cache.c
index 40c98fa6b5d6..57314bee9059 100644
--- a/fs/squashfs/cache.c
+++ b/fs/squashfs/cache.c
@@ -51,7 +51,6 @@
 #include <linux/sched.h>
 #include <linux/spinlock.h>
 #include <linux/wait.h>
-#include <linux/zlib.h>
 #include <linux/pagemap.h>
 
 #include "squashfs_fs.h"
diff --git a/fs/squashfs/decompressor.c b/fs/squashfs/decompressor.c
new file mode 100644
index 000000000000..157478da6ac9
--- /dev/null
+++ b/fs/squashfs/decompressor.c
@@ -0,0 +1,68 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * decompressor.c
+ */
+
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/buffer_head.h>
+
+#include "squashfs_fs.h"
+#include "squashfs_fs_sb.h"
+#include "squashfs_fs_i.h"
+#include "decompressor.h"
+#include "squashfs.h"
+
+/*
+ * This file (and decompressor.h) implements a decompressor framework for
+ * Squashfs, allowing multiple decompressors to be easily supported
+ */
+
+static const struct squashfs_decompressor squashfs_lzma_unsupported_comp_ops = {
+        NULL, NULL, NULL, LZMA_COMPRESSION, "lzma", 0
+};
+
+static const struct squashfs_decompressor squashfs_lzo_unsupported_comp_ops = {
+        NULL, NULL, NULL, LZO_COMPRESSION, "lzo", 0
+};
+
+static const struct squashfs_decompressor squashfs_unknown_comp_ops = {
+        NULL, NULL, NULL, 0, "unknown", 0
+};
+
+static const struct squashfs_decompressor *decompressor[] = {
+        &squashfs_zlib_comp_ops,
+        &squashfs_lzma_unsupported_comp_ops,
+        &squashfs_lzo_unsupported_comp_ops,
+        &squashfs_unknown_comp_ops
+};
+
+
+const struct squashfs_decompressor *squashfs_lookup_decompressor(int id)
+{
+        int i;
+
+        for (i = 0; decompressor[i]->id; i++)
+                if (id == decompressor[i]->id)
+                        break;
+
+        return decompressor[i];
+}
diff --git a/fs/squashfs/decompressor.h b/fs/squashfs/decompressor.h
new file mode 100644
index 000000000000..7425f80783f6
--- /dev/null
+++ b/fs/squashfs/decompressor.h
@@ -0,0 +1,55 @@
+#ifndef DECOMPRESSOR_H
+#define DECOMPRESSOR_H
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * decompressor.h
+ */
+
+struct squashfs_decompressor {
+        void    *(*init)(struct squashfs_sb_info *);
+        void    (*free)(void *);
+        int     (*decompress)(struct squashfs_sb_info *, void **,
+                struct buffer_head **, int, int, int, int, int);
+        int     id;
+        char    *name;
+        int     supported;
+};
+
+static inline void *squashfs_decompressor_init(struct squashfs_sb_info *msblk)
+{
+        return msblk->decompressor->init(msblk);
+}
+
+static inline void squashfs_decompressor_free(struct squashfs_sb_info *msblk,
+        void *s)
+{
+        if (msblk->decompressor)
+                msblk->decompressor->free(s);
+}
+
+static inline int squashfs_decompress(struct squashfs_sb_info *msblk,
+        void **buffer, struct buffer_head **bh, int b, int offset, int length,
+        int srclength, int pages)
+{
+        return msblk->decompressor->decompress(msblk, buffer, bh, b, offset,
+                length, srclength, pages);
+}
+#endif
diff --git a/fs/squashfs/dir.c b/fs/squashfs/dir.c
index 566b0eaed868..12b933ac6585 100644
--- a/fs/squashfs/dir.c
+++ b/fs/squashfs/dir.c
@@ -30,7 +30,6 @@
 #include <linux/fs.h>
 #include <linux/vfs.h>
 #include <linux/slab.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
diff --git a/fs/squashfs/export.c b/fs/squashfs/export.c
index 2b1b8fe5e037..7f93d5a9ee05 100644
--- a/fs/squashfs/export.c
+++ b/fs/squashfs/export.c
@@ -39,7 +39,6 @@
 #include <linux/vfs.h>
 #include <linux/dcache.h>
 #include <linux/exportfs.h>
-#include <linux/zlib.h>
 #include <linux/slab.h>
 
 #include "squashfs_fs.h"
diff --git a/fs/squashfs/file.c b/fs/squashfs/file.c
index 717767d831df..a25c5060bdcb 100644
--- a/fs/squashfs/file.c
+++ b/fs/squashfs/file.c
@@ -47,7 +47,6 @@
 #include <linux/string.h>
 #include <linux/pagemap.h>
 #include <linux/mutex.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
diff --git a/fs/squashfs/fragment.c b/fs/squashfs/fragment.c
index b5a2c15bbbc7..7c90bbd6879d 100644
--- a/fs/squashfs/fragment.c
+++ b/fs/squashfs/fragment.c
@@ -36,7 +36,6 @@
 #include <linux/fs.h>
 #include <linux/vfs.h>
 #include <linux/slab.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
diff --git a/fs/squashfs/id.c b/fs/squashfs/id.c
index 3795b837ba28..b7f64bcd2b70 100644
--- a/fs/squashfs/id.c
+++ b/fs/squashfs/id.c
@@ -34,7 +34,6 @@
 #include <linux/fs.h>
 #include <linux/vfs.h>
 #include <linux/slab.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
index 9101dbde39ec..49daaf669e41 100644
--- a/fs/squashfs/inode.c
+++ b/fs/squashfs/inode.c
@@ -40,7 +40,6 @@
 
 #include <linux/fs.h>
 #include <linux/vfs.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index 9e398653b22b..5266bd8ad932 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -57,7 +57,6 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/dcache.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index 0e9feb6adf7e..fe2587af5512 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -51,6 +51,9 @@ extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *,
                                 u64, int);
 extern int squashfs_read_table(struct super_block *, void *, u64, int);
 
+/* decompressor.c */
+extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);
+
 /* export.c */
 extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64,
                                 unsigned int);
@@ -71,7 +74,7 @@ extern struct inode *squashfs_iget(struct super_block *, long long,
 extern int squashfs_read_inode(struct inode *, long long);
 
 /*
- * Inodes and files operations
+ * Inodes, files and decompressor operations
  */
 
 /* dir.c */
@@ -88,3 +91,6 @@ extern const struct inode_operations squashfs_dir_inode_ops;
 
 /* symlink.c */
 extern const struct address_space_operations squashfs_symlink_aops;
+
+/* zlib_wrapper.c */
+extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
diff --git a/fs/squashfs/squashfs_fs.h b/fs/squashfs/squashfs_fs.h
index 283daafc568e..79024245ea00 100644
--- a/fs/squashfs/squashfs_fs.h
+++ b/fs/squashfs/squashfs_fs.h
@@ -183,8 +183,6 @@
 #define SQUASHFS_MAX_FILE_SIZE          (1LL << \
                                         (SQUASHFS_MAX_FILE_SIZE_LOG - 2))
 
-#define SQUASHFS_MARKER_BYTE            0xff
-
 /* meta index cache */
 #define SQUASHFS_META_INDEXES   (SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
 #define SQUASHFS_META_ENTRIES   127
@@ -211,7 +209,9 @@ struct meta_index {
 /*
  * definitions for structures on disk
  */
-#define ZLIB_COMPRESSION         1
+#define ZLIB_COMPRESSION        1
+#define LZMA_COMPRESSION        2
+#define LZO_COMPRESSION         3
 
 struct squashfs_super_block {
         __le32                  s_magic;
diff --git a/fs/squashfs/squashfs_fs_sb.h b/fs/squashfs/squashfs_fs_sb.h
index c8c65614dd1c..2e77dc547e25 100644
--- a/fs/squashfs/squashfs_fs_sb.h
+++ b/fs/squashfs/squashfs_fs_sb.h
@@ -52,25 +52,25 @@ struct squashfs_cache_entry {
 };
 
 struct squashfs_sb_info {
-        int                     devblksize;
-        int                     devblksize_log2;
-        struct squashfs_cache   *block_cache;
-        struct squashfs_cache   *fragment_cache;
-        struct squashfs_cache   *read_page;
-        int                     next_meta_index;
-        __le64                  *id_table;
-        __le64                  *fragment_index;
-        unsigned int            *fragment_index_2;
-        struct mutex            read_data_mutex;
-        struct mutex            meta_index_mutex;
-        struct meta_index       *meta_index;
-        z_stream                stream;
-        __le64                  *inode_lookup_table;
-        u64                     inode_table;
-        u64                     directory_table;
-        unsigned int            block_size;
-        unsigned short          block_log;
-        long long               bytes_used;
-        unsigned int            inodes;
+        const struct squashfs_decompressor      *decompressor;
+        int                                     devblksize;
+        int                                     devblksize_log2;
+        struct squashfs_cache                   *block_cache;
+        struct squashfs_cache                   *fragment_cache;
+        struct squashfs_cache                   *read_page;
+        int                                     next_meta_index;
+        __le64                                  *id_table;
+        __le64                                  *fragment_index;
+        struct mutex                            read_data_mutex;
+        struct mutex                            meta_index_mutex;
+        struct meta_index                       *meta_index;
+        void                                    *stream;
+        __le64                                  *inode_lookup_table;
+        u64                                     inode_table;
+        u64                                     directory_table;
+        unsigned int                            block_size;
+        unsigned short                          block_log;
+        long long                               bytes_used;
+        unsigned int                            inodes;
 };
 #endif
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 6c197ef53add..3550aec2f655 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -35,34 +35,41 @@
 #include <linux/pagemap.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/zlib.h>
 #include <linux/magic.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
 #include "squashfs_fs_i.h"
 #include "squashfs.h"
+#include "decompressor.h"
 
 static struct file_system_type squashfs_fs_type;
 static const struct super_operations squashfs_super_ops;
 
-static int supported_squashfs_filesystem(short major, short minor, short comp)
+static const struct squashfs_decompressor *supported_squashfs_filesystem(short
+        major, short minor, short id)
 {
+        const struct squashfs_decompressor *decompressor;
+
         if (major < SQUASHFS_MAJOR) {
                 ERROR("Major/Minor mismatch, older Squashfs %d.%d "
                         "filesystems are unsupported\n", major, minor);
-                return -EINVAL;
+                return NULL;
         } else if (major > SQUASHFS_MAJOR || minor > SQUASHFS_MINOR) {
                 ERROR("Major/Minor mismatch, trying to mount newer "
                         "%d.%d filesystem\n", major, minor);
                 ERROR("Please update your kernel\n");
-                return -EINVAL;
+                return NULL;
         }
 
-        if (comp != ZLIB_COMPRESSION)
-                return -EINVAL;
+        decompressor = squashfs_lookup_decompressor(id);
+        if (!decompressor->supported) {
+                ERROR("Filesystem uses \"%s\" compression. This is not "
+                        "supported\n", decompressor->name);
+                return NULL;
+        }
 
-        return 0;
+        return decompressor;
 }
 
 
@@ -87,13 +94,6 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
         }
         msblk = sb->s_fs_info;
 
-        msblk->stream.workspace = kmalloc(zlib_inflate_workspacesize(),
-                GFP_KERNEL);
-        if (msblk->stream.workspace == NULL) {
-                ERROR("Failed to allocate zlib workspace\n");
-                goto failure;
-        }
-
         sblk = kzalloc(sizeof(*sblk), GFP_KERNEL);
         if (sblk == NULL) {
                 ERROR("Failed to allocate squashfs_super_block\n");
@@ -120,25 +120,25 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
                 goto failed_mount;
         }
 
+        err = -EINVAL;
+
         /* Check it is a SQUASHFS superblock */
         sb->s_magic = le32_to_cpu(sblk->s_magic);
         if (sb->s_magic != SQUASHFS_MAGIC) {
                 if (!silent)
                         ERROR("Can't find a SQUASHFS superblock on %s\n",
                                                 bdevname(sb->s_bdev, b));
-                err = -EINVAL;
                 goto failed_mount;
         }
 
-        /* Check the MAJOR & MINOR versions and compression type */
-        err = supported_squashfs_filesystem(le16_to_cpu(sblk->s_major),
+        /* Check the MAJOR & MINOR versions and lookup compression type */
+        msblk->decompressor = supported_squashfs_filesystem(
+                        le16_to_cpu(sblk->s_major),
                         le16_to_cpu(sblk->s_minor),
                         le16_to_cpu(sblk->compression));
-        if (err < 0)
+        if (msblk->decompressor == NULL)
                 goto failed_mount;
 
-        err = -EINVAL;
-
         /*
          * Check if there's xattrs in the filesystem.  These are not
          * supported in this version, so warn that they will be ignored.
@@ -205,6 +205,10 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
 
         err = -ENOMEM;
 
+        msblk->stream = squashfs_decompressor_init(msblk);
+        if (msblk->stream == NULL)
+                goto failed_mount;
+
         msblk->block_cache = squashfs_cache_init("metadata",
                         SQUASHFS_CACHED_BLKS, SQUASHFS_METADATA_SIZE);
         if (msblk->block_cache == NULL)
@@ -292,17 +296,16 @@ failed_mount:
         squashfs_cache_delete(msblk->block_cache);
         squashfs_cache_delete(msblk->fragment_cache);
         squashfs_cache_delete(msblk->read_page);
+        squashfs_decompressor_free(msblk, msblk->stream);
         kfree(msblk->inode_lookup_table);
         kfree(msblk->fragment_index);
         kfree(msblk->id_table);
-        kfree(msblk->stream.workspace);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
         kfree(sblk);
         return err;
 
 failure:
-        kfree(msblk->stream.workspace);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
         return -ENOMEM;
@@ -346,10 +349,10 @@ static void squashfs_put_super(struct super_block *sb)
                 squashfs_cache_delete(sbi->block_cache);
                 squashfs_cache_delete(sbi->fragment_cache);
                 squashfs_cache_delete(sbi->read_page);
+                squashfs_decompressor_free(sbi, sbi->stream);
                 kfree(sbi->id_table);
                 kfree(sbi->fragment_index);
                 kfree(sbi->meta_index);
-                kfree(sbi->stream.workspace);
                 kfree(sb->s_fs_info);
                 sb->s_fs_info = NULL;
         }
diff --git a/fs/squashfs/symlink.c b/fs/squashfs/symlink.c
index 83d87880aac8..e80be2022a7f 100644
--- a/fs/squashfs/symlink.c
+++ b/fs/squashfs/symlink.c
@@ -36,7 +36,6 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/pagemap.h>
-#include <linux/zlib.h>
 
 #include "squashfs_fs.h"
 #include "squashfs_fs_sb.h"
diff --git a/fs/squashfs/zlib_wrapper.c b/fs/squashfs/zlib_wrapper.c
new file mode 100644
index 000000000000..4dd70e04333b
--- /dev/null
+++ b/fs/squashfs/zlib_wrapper.c
@@ -0,0 +1,150 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ * Phillip Lougher <phillip@lougher.demon.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * zlib_wrapper.c
+ */
+
+
+#include <linux/mutex.h>
+#include <linux/buffer_head.h>
+#include <linux/zlib.h>
+
+#include "squashfs_fs.h"
+#include "squashfs_fs_sb.h"
+#include "squashfs_fs_i.h"
+#include "squashfs.h"
+#include "decompressor.h"
+
+static void *zlib_init(struct squashfs_sb_info *dummy)
+{
+        z_stream *stream = kmalloc(sizeof(z_stream), GFP_KERNEL);
+        if (stream == NULL)
+                goto failed;
+        stream->workspace = kmalloc(zlib_inflate_workspacesize(),
+                GFP_KERNEL);
+        if (stream->workspace == NULL)
+                goto failed;
+
+        return stream;
+
+failed:
+        ERROR("Failed to allocate zlib workspace\n");
+        kfree(stream);
+        return NULL;
+}
+
+
+static void zlib_free(void *strm)
+{
+        z_stream *stream = strm;
+
+        if (stream)
+                kfree(stream->workspace);
+        kfree(stream);
+}
+
+
+static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
+        struct buffer_head **bh, int b, int offset, int length, int srclength,
+        int pages)
+{
+        int zlib_err = 0, zlib_init = 0;
+        int avail, bytes, k = 0, page = 0;
+        z_stream *stream = msblk->stream;
+
+        mutex_lock(&msblk->read_data_mutex);
+
+        stream->avail_out = 0;
+        stream->avail_in = 0;
+
+        bytes = length;
+        do {
+                if (stream->avail_in == 0 && k < b) {
+                        avail = min(bytes, msblk->devblksize - offset);
+                        bytes -= avail;
+                        wait_on_buffer(bh[k]);
+                        if (!buffer_uptodate(bh[k]))
+                                goto release_mutex;
+
+                        if (avail == 0) {
+                                offset = 0;
+                                put_bh(bh[k++]);
+                                continue;
+                        }
+
+                        stream->next_in = bh[k]->b_data + offset;
+                        stream->avail_in = avail;
+                        offset = 0;
+                }
+
+                if (stream->avail_out == 0 && page < pages) {
+                        stream->next_out = buffer[page++];
+                        stream->avail_out = PAGE_CACHE_SIZE;
+                }
+
+                if (!zlib_init) {
+                        zlib_err = zlib_inflateInit(stream);
+                        if (zlib_err != Z_OK) {
+                                ERROR("zlib_inflateInit returned unexpected "
+                                        "result 0x%x, srclength %d\n",
+                                        zlib_err, srclength);
+                                goto release_mutex;
+                        }
+                        zlib_init = 1;
+                }
+
+                zlib_err = zlib_inflate(stream, Z_SYNC_FLUSH);
+
+                if (stream->avail_in == 0 && k < b)
+                        put_bh(bh[k++]);
+        } while (zlib_err == Z_OK);
+
+        if (zlib_err != Z_STREAM_END) {
+                ERROR("zlib_inflate error, data probably corrupt\n");
+                goto release_mutex;
+        }
+
+        zlib_err = zlib_inflateEnd(stream);
+        if (zlib_err != Z_OK) {
+                ERROR("zlib_inflate error, data probably corrupt\n");
+                goto release_mutex;
+        }
+
+        mutex_unlock(&msblk->read_data_mutex);
+        return stream->total_out;
+
+release_mutex:
+        mutex_unlock(&msblk->read_data_mutex);
+
+        for (; k < b; k++)
+                put_bh(bh[k]);
+
+        return -EIO;
+}
+
+const struct squashfs_decompressor squashfs_zlib_comp_ops = {
+        .init = zlib_init,
+        .free = zlib_free,
+        .decompress = zlib_uncompress,
+        .id = ZLIB_COMPRESSION,
+        .name = "zlib",
+        .supported = 1
+};
+
diff --git a/fs/super.c b/fs/super.c
index aff046b0fe78..f35ac6022109 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -568,7 +568,7 @@ out:
 int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
 {
         int retval;
-        int remount_rw;
+        int remount_rw, remount_ro;
 
         if (sb->s_frozen != SB_UNFROZEN)
                 return -EBUSY;
@@ -583,9 +583,12 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
         shrink_dcache_sb(sb);
         sync_filesystem(sb);
 
+        remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY);
+        remount_rw = !(flags & MS_RDONLY) && (sb->s_flags & MS_RDONLY);
+
         /* If we are remounting RDONLY and current sb is read/write,
            make sure there are no rw files opened */
-        if ((flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY)) {
+        if (remount_ro) {
                 if (force)
                         mark_files_ro(sb);
                 else if (!fs_may_remount_ro(sb))
@@ -594,7 +597,6 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
                 if (retval < 0 && retval != -ENOSYS)
                         return -EBUSY;
         }
-        remount_rw = !(flags & MS_RDONLY) && (sb->s_flags & MS_RDONLY);
 
         if (sb->s_op->remount_fs) {
                 retval = sb->s_op->remount_fs(sb, &flags, data);
@@ -604,6 +606,16 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
         sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) | (flags & MS_RMT_MASK);
         if (remount_rw)
                 vfs_dq_quota_on_remount(sb);
+        /*
+         * Some filesystems modify their metadata via some other path than the
+         * bdev buffer cache (eg. use a private mapping, or directories in
+         * pagecache, etc). Also file data modifications go via their own
+         * mappings. So If we try to mount readonly then copy the filesystem
+         * from bdev, we could get stale data, so invalidate it to give a best
+         * effort at coherency.
+         */
+        if (remount_ro && sb->s_bdev)
+                invalidate_bdev(sb->s_bdev);
         return 0;
 }
 
@@ -925,6 +937,9 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
         if (!mnt)
                 goto out;
 
+        if (flags & MS_KERNMOUNT)
+                mnt->mnt_flags = MNT_INTERNAL;
+
         if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {
                 secdata = alloc_secdata();
                 if (!secdata)
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 220b758523ae..6a06a1d1ea7b 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -81,24 +81,23 @@ int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr * iattr)
                 if (!sd_attrs)
                         return -ENOMEM;
                 sd->s_iattr = sd_attrs;
-        } else {
-                /* attributes were changed at least once in past */
-                iattrs = &sd_attrs->ia_iattr;
-
-                if (ia_valid & ATTR_UID)
-                        iattrs->ia_uid = iattr->ia_uid;
-                if (ia_valid & ATTR_GID)
-                        iattrs->ia_gid = iattr->ia_gid;
-                if (ia_valid & ATTR_ATIME)
-                        iattrs->ia_atime = iattr->ia_atime;
-                if (ia_valid & ATTR_MTIME)
-                        iattrs->ia_mtime = iattr->ia_mtime;
-                if (ia_valid & ATTR_CTIME)
-                        iattrs->ia_ctime = iattr->ia_ctime;
-                if (ia_valid & ATTR_MODE) {
-                        umode_t mode = iattr->ia_mode;
-                        iattrs->ia_mode = sd->s_mode = mode;
-                }
+        }
+        /* attributes were changed at least once in past */
+        iattrs = &sd_attrs->ia_iattr;
+
+        if (ia_valid & ATTR_UID)
+                iattrs->ia_uid = iattr->ia_uid;
+        if (ia_valid & ATTR_GID)
+                iattrs->ia_gid = iattr->ia_gid;
+        if (ia_valid & ATTR_ATIME)
+                iattrs->ia_atime = iattr->ia_atime;
+        if (ia_valid & ATTR_MTIME)
+                iattrs->ia_mtime = iattr->ia_mtime;
+        if (ia_valid & ATTR_CTIME)
+                iattrs->ia_ctime = iattr->ia_ctime;
+        if (ia_valid & ATTR_MODE) {
+                umode_t mode = iattr->ia_mode;
+                iattrs->ia_mode = sd->s_mode = mode;
         }
         return 0;
 }
diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c
index 82372e332f08..b2d96f45c12b 100644
--- a/fs/udf/balloc.c
+++ b/fs/udf/balloc.c
@@ -547,7 +547,7 @@ static void udf_table_free_blocks(struct super_block *sb,
                 }
 
                 if (epos.offset + (2 * adsize) > sb->s_blocksize) {
-                        char *sptr, *dptr;
+                        unsigned char *sptr, *dptr;
                         int loffset;
 
                         brelse(oepos.bh);
diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index 61d9a76a3a69..f0f2a436251e 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -45,8 +45,8 @@ static int do_udf_readdir(struct inode *dir, struct file *filp,
         int block, iblock;
         loff_t nf_pos = (filp->f_pos - 1) << 2;
         int flen;
-        char *fname = NULL;
-        char *nameptr;
+        unsigned char *fname = NULL;
+        unsigned char *nameptr;
         uint16_t liu;
         uint8_t lfi;
         loff_t size = udf_ext0_offset(dir) + dir->i_size;
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index f90231eb2916..378a7592257c 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1672,7 +1672,7 @@ int8_t udf_add_aext(struct inode *inode, struct extent_position *epos,
                 return -1;
 
         if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
-                char *sptr, *dptr;
+                unsigned char *sptr, *dptr;
                 struct buffer_head *nbh;
                 int err, loffset;
                 struct kernel_lb_addr obloc = epos->block;
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index cd2115060fdc..7c56ff00cd53 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -34,8 +34,8 @@
 #include <linux/crc-itu-t.h>
 #include <linux/exportfs.h>
 
-static inline int udf_match(int len1, const char *name1, int len2,
-                            const char *name2)
+static inline int udf_match(int len1, const unsigned char *name1, int len2,
+                            const unsigned char *name2)
 {
         if (len1 != len2)
                 return 0;
@@ -142,15 +142,15 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
 }
 
 static struct fileIdentDesc *udf_find_entry(struct inode *dir,
-                                            struct qstr *child,
+                                            const struct qstr *child,
                                             struct udf_fileident_bh *fibh,
                                             struct fileIdentDesc *cfi)
 {
         struct fileIdentDesc *fi = NULL;
         loff_t f_pos;
         int block, flen;
-        char *fname = NULL;
-        char *nameptr;
+        unsigned char *fname = NULL;
+        unsigned char *nameptr;
         uint8_t lfi;
         uint16_t liu;
         loff_t size;
@@ -308,7 +308,7 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 {
         struct super_block *sb = dir->i_sb;
         struct fileIdentDesc *fi = NULL;
-        char *name = NULL;
+        unsigned char *name = NULL;
         int namelen;
         loff_t f_pos;
         loff_t size = udf_ext0_offset(dir) + dir->i_size;
@@ -885,16 +885,16 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
 {
         struct inode *inode;
         struct pathComponent *pc;
-        char *compstart;
+        const char *compstart;
         struct udf_fileident_bh fibh;
         struct extent_position epos = {};
         int eoffset, elen = 0;
         struct fileIdentDesc *fi;
         struct fileIdentDesc cfi;
-        char *ea;
+        uint8_t *ea;
         int err;
         int block;
-        char *name = NULL;
+        unsigned char *name = NULL;
         int namelen;
         struct buffer_head *bh;
         struct udf_inode_info *iinfo;
@@ -970,7 +970,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
 
                 pc = (struct pathComponent *)(ea + elen);
 
-                compstart = (char *)symname;
+                compstart = symname;
 
                 do {
                         symname++;
diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index c3265e1385d4..852e91845688 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -32,12 +32,12 @@
 #include <linux/buffer_head.h>
 #include "udf_i.h"
 
-static void udf_pc_to_char(struct super_block *sb, char *from, int fromlen,
-                           char *to)
+static void udf_pc_to_char(struct super_block *sb, unsigned char *from,
+                           int fromlen, unsigned char *to)
 {
         struct pathComponent *pc;
         int elen = 0;
-        char *p = to;
+        unsigned char *p = to;
 
         while (elen < fromlen) {
                 pc = (struct pathComponent *)(from + elen);
@@ -75,9 +75,9 @@ static int udf_symlink_filler(struct file *file, struct page *page)
 {
         struct inode *inode = page->mapping->host;
         struct buffer_head *bh = NULL;
-        char *symlink;
+        unsigned char *symlink;
         int err = -EIO;
-        char *p = kmap(page);
+        unsigned char *p = kmap(page);
         struct udf_inode_info *iinfo;
 
         lock_kernel();
diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
index 22af68f8b682..317a0d444f6b 100644
--- a/fs/ufs/dir.c
+++ b/fs/ufs/dir.c
@@ -31,7 +31,7 @@
  * len <= UFS_MAXNAMLEN and de != NULL are guaranteed by caller.
  */
 static inline int ufs_match(struct super_block *sb, int len,
-                const char * const name, struct ufs_dir_entry * de)
+                const unsigned char *name, struct ufs_dir_entry *de)
 {
         if (len != ufs_get_de_namlen(sb, de))
                 return 0;
@@ -70,7 +70,7 @@ static inline unsigned long ufs_dir_pages(struct inode *inode)
         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
 }
 
-ino_t ufs_inode_by_name(struct inode *dir, struct qstr *qstr)
+ino_t ufs_inode_by_name(struct inode *dir, const struct qstr *qstr)
 {
         ino_t res = 0;
         struct ufs_dir_entry *de;
@@ -249,11 +249,11 @@ struct ufs_dir_entry *ufs_dotdot(struct inode *dir, struct page **p)
  * (as a parameter - res_dir). Page is returned mapped and unlocked.
  * Entry is guaranteed to be valid.
  */
-struct ufs_dir_entry *ufs_find_entry(struct inode *dir, struct qstr *qstr,
+struct ufs_dir_entry *ufs_find_entry(struct inode *dir, const struct qstr *qstr,
                                      struct page **res_page)
 {
         struct super_block *sb = dir->i_sb;
-        const char *name = qstr->name;
+        const unsigned char *name = qstr->name;
         int namelen = qstr->len;
         unsigned reclen = UFS_DIR_REC_LEN(namelen);
         unsigned long start, n;
@@ -313,7 +313,7 @@ found:
 int ufs_add_link(struct dentry *dentry, struct inode *inode)
 {
         struct inode *dir = dentry->d_parent->d_inode;
-        const char *name = dentry->d_name.name;
+        const unsigned char *name = dentry->d_name.name;
         int namelen = dentry->d_name.len;
         struct super_block *sb = dir->i_sb;
         unsigned reclen = UFS_DIR_REC_LEN(namelen);
diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h
index 0b4c39bc0d9e..01d0e2a3b230 100644
--- a/fs/ufs/ufs.h
+++ b/fs/ufs/ufs.h
@@ -86,9 +86,9 @@ extern void ufs_put_cylinder (struct super_block *, unsigned);
 /* dir.c */
 extern const struct inode_operations ufs_dir_inode_operations;
 extern int ufs_add_link (struct dentry *, struct inode *);
-extern ino_t ufs_inode_by_name(struct inode *, struct qstr *);
+extern ino_t ufs_inode_by_name(struct inode *, const struct qstr *);
 extern int ufs_make_empty(struct inode *, struct inode *);
-extern struct ufs_dir_entry *ufs_find_entry(struct inode *, struct qstr *, struct page **);
+extern struct ufs_dir_entry *ufs_find_entry(struct inode *, const struct qstr *, struct page **);
 extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
 extern int ufs_empty_dir (struct inode *);
 extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 56641fe52a23..5c5a366aa332 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -16,7 +16,7 @@
 # Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #
 
-EXTRA_CFLAGS +=  -I$(src) -I$(src)/linux-2.6 -funsigned-char
+EXTRA_CFLAGS +=  -I$(src) -I$(src)/linux-2.6
 
 XFS_LINUX := linux-2.6
 
diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c
index 2d3f90afe5f1..bc7405585def 100644
--- a/fs/xfs/linux-2.6/kmem.c
+++ b/fs/xfs/linux-2.6/kmem.c
@@ -16,7 +16,6 @@
  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 #include <linux/mm.h>
-#include <linux/vmalloc.h>
 #include <linux/highmem.h>
 #include <linux/swap.h>
 #include <linux/blkdev.h>
@@ -24,8 +23,25 @@
 #include "time.h"
 #include "kmem.h"
 
-#define MAX_VMALLOCS    6
-#define MAX_SLAB_SIZE   0x20000
+/*
+ * Greedy allocation.  May fail and may return vmalloced memory.
+ *
+ * Must be freed using kmem_free_large.
+ */
+void *
+kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize)
+{
+        void            *ptr;
+        size_t          kmsize = maxsize;
+
+        while (!(ptr = kmem_zalloc_large(kmsize))) {
+                if ((kmsize >>= 1) <= minsize)
+                        kmsize = minsize;
+        }
+        if (ptr)
+                *size = kmsize;
+        return ptr;
+}
 
 void *
 kmem_alloc(size_t size, unsigned int __nocast flags)
@@ -34,19 +50,8 @@ kmem_alloc(size_t size, unsigned int __nocast flags)
         gfp_t   lflags = kmem_flags_convert(flags);
         void    *ptr;
 
-#ifdef DEBUG
-        if (unlikely(!(flags & KM_LARGE) && (size > PAGE_SIZE))) {
-                printk(KERN_WARNING "Large %s attempt, size=%ld\n",
-                        __func__, (long)size);
-                dump_stack();
-        }
-#endif
-
         do {
-                if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS)
-                        ptr = kmalloc(size, lflags);
-                else
-                        ptr = __vmalloc(size, lflags, PAGE_KERNEL);
+                ptr = kmalloc(size, lflags);
                 if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
                         return ptr;
                 if (!(++retries % 100))
@@ -68,27 +73,6 @@ kmem_zalloc(size_t size, unsigned int __nocast flags)
         return ptr;
 }
 
-void *
-kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize,
-                   unsigned int __nocast flags)
-{
-        void            *ptr;
-        size_t          kmsize = maxsize;
-        unsigned int    kmflags = (flags & ~KM_SLEEP) | KM_NOSLEEP;
-
-        while (!(ptr = kmem_zalloc(kmsize, kmflags))) {
-                if ((kmsize <= minsize) && (flags & KM_NOSLEEP))
-                        break;
-                if ((kmsize >>= 1) <= minsize) {
-                        kmsize = minsize;
-                        kmflags = flags;
-                }
-        }
-        if (ptr)
-                *size = kmsize;
-        return ptr;
-}
-
 void
 kmem_free(const void *ptr)
 {
diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index 179cbd630f69..f7c8f7a9ea6d 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -21,6 +21,7 @@
 #include <linux/slab.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <linux/vmalloc.h>
 
 /*
  * General memory allocation interfaces
@@ -30,7 +31,6 @@
 #define KM_NOSLEEP      0x0002u
 #define KM_NOFS         0x0004u
 #define KM_MAYFAIL      0x0008u
-#define KM_LARGE        0x0010u
 
 /*
  * We use a special process flag to avoid recursive callbacks into
@@ -42,7 +42,7 @@ kmem_flags_convert(unsigned int __nocast flags)
 {
         gfp_t   lflags;
 
-        BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_LARGE));
+        BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL));
 
         if (flags & KM_NOSLEEP) {
                 lflags = GFP_ATOMIC | __GFP_NOWARN;
@@ -56,10 +56,25 @@ kmem_flags_convert(unsigned int __nocast flags)
 
 extern void *kmem_alloc(size_t, unsigned int __nocast);
 extern void *kmem_zalloc(size_t, unsigned int __nocast);
-extern void *kmem_zalloc_greedy(size_t *, size_t, size_t, unsigned int __nocast);
 extern void *kmem_realloc(const void *, size_t, size_t, unsigned int __nocast);
 extern void  kmem_free(const void *);
 
+static inline void *kmem_zalloc_large(size_t size)
+{
+        void *ptr;
+
+        ptr = vmalloc(size);
+        if (ptr)
+                memset(ptr, 0, size);
+        return ptr;
+}
+static inline void kmem_free_large(void *ptr)
+{
+        vfree(ptr);
+}
+
+extern void *kmem_zalloc_greedy(size_t *, size_t, size_t);
+
 /*
  * Zone interfaces
  */
diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c
index 883ca5ab8af5..bf85bbe4a9ae 100644
--- a/fs/xfs/linux-2.6/xfs_acl.c
+++ b/fs/xfs/linux-2.6/xfs_acl.c
@@ -106,7 +106,7 @@ xfs_get_acl(struct inode *inode, int type)
         struct posix_acl *acl;
         struct xfs_acl *xfs_acl;
         int len = sizeof(struct xfs_acl);
-        char *ea_name;
+        unsigned char *ea_name;
         int error;
 
         acl = get_cached_acl(inode, type);
@@ -133,7 +133,8 @@ xfs_get_acl(struct inode *inode, int type)
         if (!xfs_acl)
                 return ERR_PTR(-ENOMEM);
 
-        error = -xfs_attr_get(ip, ea_name, (char *)xfs_acl, &len, ATTR_ROOT);
+        error = -xfs_attr_get(ip, ea_name, (unsigned char *)xfs_acl,
+                                                        &len, ATTR_ROOT);
         if (error) {
                 /*
                  * If the attribute doesn't exist make sure we have a negative
@@ -162,7 +163,7 @@ STATIC int
 xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
 {
         struct xfs_inode *ip = XFS_I(inode);
-        char *ea_name;
+        unsigned char *ea_name;
         int error;
 
         if (S_ISLNK(inode->i_mode))
@@ -194,7 +195,7 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
                         (sizeof(struct xfs_acl_entry) *
                          (XFS_ACL_MAX_ENTRIES - acl->a_count));
 
-                error = -xfs_attr_set(ip, ea_name, (char *)xfs_acl,
+                error = -xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl,
                                 len, ATTR_ROOT);
 
                 kfree(xfs_acl);
@@ -262,7 +263,7 @@ xfs_set_mode(struct inode *inode, mode_t mode)
 }
 
 static int
-xfs_acl_exists(struct inode *inode, char *name)
+xfs_acl_exists(struct inode *inode, unsigned char *name)
 {
         int len = sizeof(struct xfs_acl);
 
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 77b8be81c769..6f76ba85f193 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -33,6 +33,7 @@
 #include <linux/migrate.h>
 #include <linux/backing-dev.h>
 #include <linux/freezer.h>
+#include <linux/list_sort.h>
 
 #include "xfs_sb.h"
 #include "xfs_inum.h"
@@ -76,6 +77,27 @@ struct workqueue_struct *xfsconvertd_workqueue;
 #define xfs_buf_deallocate(bp) \
         kmem_zone_free(xfs_buf_zone, (bp));
 
+static inline int
+xfs_buf_is_vmapped(
+        struct xfs_buf  *bp)
+{
+        /*
+         * Return true if the buffer is vmapped.
+         *
+         * The XBF_MAPPED flag is set if the buffer should be mapped, but the
+         * code is clever enough to know it doesn't have to map a single page,
+         * so the check has to be both for XBF_MAPPED and bp->b_page_count > 1.
+         */
+        return (bp->b_flags & XBF_MAPPED) && bp->b_page_count > 1;
+}
+
+static inline int
+xfs_buf_vmap_len(
+        struct xfs_buf  *bp)
+{
+        return (bp->b_page_count * PAGE_SIZE) - bp->b_offset;
+}
+
 /*
  *      Page Region interfaces.
  *
@@ -314,7 +336,7 @@ xfs_buf_free(
         if (bp->b_flags & (_XBF_PAGE_CACHE|_XBF_PAGES)) {
                 uint            i;
 
-                if ((bp->b_flags & XBF_MAPPED) && (bp->b_page_count > 1))
+                if (xfs_buf_is_vmapped(bp))
                         free_address(bp->b_addr - bp->b_offset);
 
                 for (i = 0; i < bp->b_page_count; i++) {
@@ -1051,22 +1073,30 @@ xfs_buf_ioerror(
 }
 
 int
-xfs_bawrite(
-        void                    *mp,
+xfs_bwrite(
+        struct xfs_mount        *mp,
         struct xfs_buf          *bp)
 {
-        trace_xfs_buf_bawrite(bp, _RET_IP_);
+        int                     iowait = (bp->b_flags & XBF_ASYNC) == 0;
+        int                     error = 0;
 
-        ASSERT(bp->b_bn != XFS_BUF_DADDR_NULL);
+        bp->b_strat = xfs_bdstrat_cb;
+        bp->b_mount = mp;
+        bp->b_flags |= XBF_WRITE;
+        if (!iowait)
+                bp->b_flags |= _XBF_RUN_QUEUES;
 
         xfs_buf_delwri_dequeue(bp);
+        xfs_buf_iostrategy(bp);
 
-        bp->b_flags &= ~(XBF_READ | XBF_DELWRI | XBF_READ_AHEAD);
-        bp->b_flags |= (XBF_WRITE | XBF_ASYNC | _XBF_RUN_QUEUES);
+        if (iowait) {
+                error = xfs_buf_iowait(bp);
+                if (error)
+                        xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR);
+                xfs_buf_relse(bp);
+        }
 
-        bp->b_mount = mp;
-        bp->b_strat = xfs_bdstrat_cb;
-        return xfs_bdstrat_cb(bp);
+        return error;
 }
 
 void
@@ -1085,6 +1115,126 @@ xfs_bdwrite(
         xfs_buf_delwri_queue(bp, 1);
 }
 
+/*
+ * Called when we want to stop a buffer from getting written or read.
+ * We attach the EIO error, muck with its flags, and call biodone
+ * so that the proper iodone callbacks get called.
+ */
+STATIC int
+xfs_bioerror(
+        xfs_buf_t *bp)
+{
+#ifdef XFSERRORDEBUG
+        ASSERT(XFS_BUF_ISREAD(bp) || bp->b_iodone);
+#endif
+
+        /*
+         * No need to wait until the buffer is unpinned, we aren't flushing it.
+         */
+        XFS_BUF_ERROR(bp, EIO);
+
+        /*
+         * We're calling biodone, so delete XBF_DONE flag.
+         */
+        XFS_BUF_UNREAD(bp);
+        XFS_BUF_UNDELAYWRITE(bp);
+        XFS_BUF_UNDONE(bp);
+        XFS_BUF_STALE(bp);
+
+        XFS_BUF_CLR_BDSTRAT_FUNC(bp);
+        xfs_biodone(bp);
+
+        return EIO;
+}
+
+/*
+ * Same as xfs_bioerror, except that we are releasing the buffer
+ * here ourselves, and avoiding the biodone call.
+ * This is meant for userdata errors; metadata bufs come with
+ * iodone functions attached, so that we can track down errors.
+ */
+STATIC int
+xfs_bioerror_relse(
+        struct xfs_buf  *bp)
+{
+        int64_t         fl = XFS_BUF_BFLAGS(bp);
+        /*
+         * No need to wait until the buffer is unpinned.
+         * We aren't flushing it.
+         *
+         * chunkhold expects B_DONE to be set, whether
+         * we actually finish the I/O or not. We don't want to
+         * change that interface.
+         */
+        XFS_BUF_UNREAD(bp);
+        XFS_BUF_UNDELAYWRITE(bp);
+        XFS_BUF_DONE(bp);
+        XFS_BUF_STALE(bp);
+        XFS_BUF_CLR_IODONE_FUNC(bp);
+        XFS_BUF_CLR_BDSTRAT_FUNC(bp);
+        if (!(fl & XBF_ASYNC)) {
+                /*
+                 * Mark b_error and B_ERROR _both_.
+                 * Lot's of chunkcache code assumes that.
+                 * There's no reason to mark error for
+                 * ASYNC buffers.
+                 */
+                XFS_BUF_ERROR(bp, EIO);
+                XFS_BUF_FINISH_IOWAIT(bp);
+        } else {
+                xfs_buf_relse(bp);
+        }
+
+        return EIO;
+}
+
+
+/*
+ * All xfs metadata buffers except log state machine buffers
+ * get this attached as their b_bdstrat callback function.
+ * This is so that we can catch a buffer
+ * after prematurely unpinning it to forcibly shutdown the filesystem.
+ */
+int
+xfs_bdstrat_cb(
+        struct xfs_buf  *bp)
+{
+        if (XFS_FORCED_SHUTDOWN(bp->b_mount)) {
+                trace_xfs_bdstrat_shut(bp, _RET_IP_);
+                /*
+                 * Metadata write that didn't get logged but
+                 * written delayed anyway. These aren't associated
+                 * with a transaction, and can be ignored.
+                 */
+                if (!bp->b_iodone && !XFS_BUF_ISREAD(bp))
+                        return xfs_bioerror_relse(bp);
+                else
+                        return xfs_bioerror(bp);
+        }
+
+        xfs_buf_iorequest(bp);
+        return 0;
+}
+
+/*
+ * Wrapper around bdstrat so that we can stop data from going to disk in case
+ * we are shutting down the filesystem.  Typically user data goes thru this
+ * path; one of the exceptions is the superblock.
+ */
+void
+xfsbdstrat(
+        struct xfs_mount        *mp,
+        struct xfs_buf          *bp)
+{
+        if (XFS_FORCED_SHUTDOWN(mp)) {
+                trace_xfs_bdstrat_shut(bp, _RET_IP_);
+                xfs_bioerror_relse(bp);
+                return;
+        }
+
+        xfs_buf_iorequest(bp);
+}
+
 STATIC void
 _xfs_buf_ioend(
         xfs_buf_t               *bp,
@@ -1107,6 +1257,9 @@ xfs_buf_bio_end_io(
 
         xfs_buf_ioerror(bp, -error);
 
+        if (!error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
+                invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp));
+
         do {
                 struct page     *page = bvec->bv_page;
 
@@ -1216,6 +1369,10 @@ next_chunk:
 
 submit_io:
         if (likely(bio->bi_size)) {
+                if (xfs_buf_is_vmapped(bp)) {
+                        flush_kernel_vmap_range(bp->b_addr,
+                                                xfs_buf_vmap_len(bp));
+                }
                 submit_bio(rw, bio);
                 if (size)
                         goto next_chunk;
@@ -1296,7 +1453,7 @@ xfs_buf_iomove(
         xfs_buf_t               *bp,    /* buffer to process            */
         size_t                  boff,   /* starting buffer offset       */
         size_t                  bsize,  /* length to copy               */
-        caddr_t                 data,   /* data address                 */
+        void                    *data,  /* data address                 */
         xfs_buf_rw_t            mode)   /* read/write/zero flag         */
 {
         size_t                  bend, cpoff, csize;
@@ -1378,8 +1535,8 @@ xfs_alloc_bufhash(
 
         btp->bt_hashshift = external ? 3 : 8;   /* 8 or 256 buckets */
         btp->bt_hashmask = (1 << btp->bt_hashshift) - 1;
-        btp->bt_hash = kmem_zalloc((1 << btp->bt_hashshift) *
-                                        sizeof(xfs_bufhash_t), KM_SLEEP | KM_LARGE);
+        btp->bt_hash = kmem_zalloc_large((1 << btp->bt_hashshift) *
+                                         sizeof(xfs_bufhash_t));
         for (i = 0; i < (1 << btp->bt_hashshift); i++) {
                 spin_lock_init(&btp->bt_hash[i].bh_lock);
                 INIT_LIST_HEAD(&btp->bt_hash[i].bh_list);
@@ -1390,7 +1547,7 @@ STATIC void
 xfs_free_bufhash(
         xfs_buftarg_t           *btp)
 {
-        kmem_free(btp->bt_hash);
+        kmem_free_large(btp->bt_hash);
         btp->bt_hash = NULL;
 }
 
@@ -1595,6 +1752,11 @@ xfs_buf_delwri_queue(
                 list_del(&bp->b_list);
         }
 
+        if (list_empty(dwq)) {
+                /* start xfsbufd as it is about to have something to do */
+                wake_up_process(bp->b_target->bt_task);
+        }
+
         bp->b_flags |= _XBF_DELWRI_Q;
         list_add_tail(&bp->b_list, dwq);
         bp->b_queuetime = jiffies;
@@ -1626,6 +1788,35 @@ xfs_buf_delwri_dequeue(
         trace_xfs_buf_delwri_dequeue(bp, _RET_IP_);
 }
 
+/*
+ * If a delwri buffer needs to be pushed before it has aged out, then promote
+ * it to the head of the delwri queue so that it will be flushed on the next
+ * xfsbufd run. We do this by resetting the queuetime of the buffer to be older
+ * than the age currently needed to flush the buffer. Hence the next time the
+ * xfsbufd sees it is guaranteed to be considered old enough to flush.
+ */
+void
+xfs_buf_delwri_promote(
+        struct xfs_buf  *bp)
+{
+        struct xfs_buftarg *btp = bp->b_target;
+        long            age = xfs_buf_age_centisecs * msecs_to_jiffies(10) + 1;
+
+        ASSERT(bp->b_flags & XBF_DELWRI);
+        ASSERT(bp->b_flags & _XBF_DELWRI_Q);
+
+        /*
+         * Check the buffer age before locking the delayed write queue as we
+         * don't need to promote buffers that are already past the flush age.
+         */
+        if (bp->b_queuetime < jiffies - age)
+                return;
+        bp->b_queuetime = jiffies - age;
+        spin_lock(&btp->bt_delwrite_lock);
+        list_move(&bp->b_list, &btp->bt_delwrite_queue);
+        spin_unlock(&btp->bt_delwrite_lock);
+}
+
 STATIC void
 xfs_buf_runall_queues(
         struct workqueue_struct *queue)
@@ -1644,6 +1835,8 @@ xfsbufd_wakeup(
         list_for_each_entry(btp, &xfs_buftarg_list, bt_list) {
                 if (test_bit(XBT_FORCE_SLEEP, &btp->bt_flags))
                         continue;
+                if (list_empty(&btp->bt_delwrite_queue))
+                        continue;
                 set_bit(XBT_FORCE_FLUSH, &btp->bt_flags);
                 wake_up_process(btp->bt_task);
         }
@@ -1694,20 +1887,53 @@ xfs_buf_delwri_split(
 
 }
 
+/*
+ * Compare function is more complex than it needs to be because
+ * the return value is only 32 bits and we are doing comparisons
+ * on 64 bit values
+ */
+static int
+xfs_buf_cmp(
+        void            *priv,
+        struct list_head *a,
+        struct list_head *b)
+{
+        struct xfs_buf  *ap = container_of(a, struct xfs_buf, b_list);
+        struct xfs_buf  *bp = container_of(b, struct xfs_buf, b_list);
+        xfs_daddr_t             diff;
+
+        diff = ap->b_bn - bp->b_bn;
+        if (diff < 0)
+                return -1;
+        if (diff > 0)
+                return 1;
+        return 0;
+}
+
+void
+xfs_buf_delwri_sort(
+        xfs_buftarg_t   *target,
+        struct list_head *list)
+{
+        list_sort(NULL, list, xfs_buf_cmp);
+}
+
 STATIC int
 xfsbufd(
         void            *data)
 {
-        struct list_head tmp;
-        xfs_buftarg_t   *target = (xfs_buftarg_t *)data;
-        int             count;
-        xfs_buf_t       *bp;
+        xfs_buftarg_t   *target = (xfs_buftarg_t *)data;
 
         current->flags |= PF_MEMALLOC;
 
         set_freezable();
 
         do {
+                long    age = xfs_buf_age_centisecs * msecs_to_jiffies(10);
+                long    tout = xfs_buf_timer_centisecs * msecs_to_jiffies(10);
+                int     count = 0;
+                struct list_head tmp;
+
                 if (unlikely(freezing(current))) {
                         set_bit(XBT_FORCE_SLEEP, &target->bt_flags);
                         refrigerator();
@@ -1715,17 +1941,16 @@ xfsbufd(
                         clear_bit(XBT_FORCE_SLEEP, &target->bt_flags);
                 }
 
-                schedule_timeout_interruptible(
-                        xfs_buf_timer_centisecs * msecs_to_jiffies(10));
+                /* sleep for a long time if there is nothing to do. */
+                if (list_empty(&target->bt_delwrite_queue))
+                        tout = MAX_SCHEDULE_TIMEOUT;
+                schedule_timeout_interruptible(tout);
 
-                xfs_buf_delwri_split(target, &tmp,
-                                xfs_buf_age_centisecs * msecs_to_jiffies(10));
-
-                count = 0;
+                xfs_buf_delwri_split(target, &tmp, age);
+                list_sort(NULL, &tmp, xfs_buf_cmp);
                 while (!list_empty(&tmp)) {
-                        bp = list_entry(tmp.next, xfs_buf_t, b_list);
-                        ASSERT(target == bp->b_target);
-
+                        struct xfs_buf *bp;
+                        bp = list_first_entry(&tmp, struct xfs_buf, b_list);
                         list_del_init(&bp->b_list);
                         xfs_buf_iostrategy(bp);
                         count++;
@@ -1751,42 +1976,45 @@ xfs_flush_buftarg(
         xfs_buftarg_t   *target,
         int             wait)
 {
-        struct list_head tmp;
-        xfs_buf_t       *bp, *n;
+        xfs_buf_t       *bp;
         int             pincount = 0;
+        LIST_HEAD(tmp_list);
+        LIST_HEAD(wait_list);
 
         xfs_buf_runall_queues(xfsconvertd_workqueue);
         xfs_buf_runall_queues(xfsdatad_workqueue);
         xfs_buf_runall_queues(xfslogd_workqueue);
 
         set_bit(XBT_FORCE_FLUSH, &target->bt_flags);
-        pincount = xfs_buf_delwri_split(target, &tmp, 0);
+        pincount = xfs_buf_delwri_split(target, &tmp_list, 0);
 
         /*
-         * Dropped the delayed write list lock, now walk the temporary list
+         * Dropped the delayed write list lock, now walk the temporary list.
+         * All I/O is issued async and then if we need to wait for completion
+         * we do that after issuing all the IO.
          */
-        list_for_each_entry_safe(bp, n, &tmp, b_list) {
+        list_sort(NULL, &tmp_list, xfs_buf_cmp);
+        while (!list_empty(&tmp_list)) {
+                bp = list_first_entry(&tmp_list, struct xfs_buf, b_list);
                 ASSERT(target == bp->b_target);
-                if (wait)
+                list_del_init(&bp->b_list);
+                if (wait) {
                         bp->b_flags &= ~XBF_ASYNC;
-                else
-                        list_del_init(&bp->b_list);
-
+                        list_add(&bp->b_list, &wait_list);
+                }
                 xfs_buf_iostrategy(bp);
         }
 
-        if (wait)
+        if (wait) {
+                /* Expedite and wait for IO to complete. */
                 blk_run_address_space(target->bt_mapping);
+                while (!list_empty(&wait_list)) {
+                        bp = list_first_entry(&wait_list, struct xfs_buf, b_list);
 
-        /*
-         * Remaining list items must be flushed before returning
-         */
-        while (!list_empty(&tmp)) {
-                bp = list_entry(tmp.next, xfs_buf_t, b_list);
-
-                list_del_init(&bp->b_list);
-                xfs_iowait(bp);
-                xfs_buf_relse(bp);
+                        list_del_init(&bp->b_list);
+                        xfs_iowait(bp);
+                        xfs_buf_relse(bp);
+                }
         }
 
         return pincount;
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h
index a34c7b54822d..386e7361e50e 100644
--- a/fs/xfs/linux-2.6/xfs_buf.h
+++ b/fs/xfs/linux-2.6/xfs_buf.h
@@ -232,13 +232,17 @@ extern void xfs_buf_lock(xfs_buf_t *);
 extern void xfs_buf_unlock(xfs_buf_t *);
 
 /* Buffer Read and Write Routines */
-extern int xfs_bawrite(void *mp, xfs_buf_t *bp);
+extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
 extern void xfs_bdwrite(void *mp, xfs_buf_t *bp);
+
+extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
+extern int xfs_bdstrat_cb(struct xfs_buf *);
+
 extern void xfs_buf_ioend(xfs_buf_t *,  int);
 extern void xfs_buf_ioerror(xfs_buf_t *, int);
 extern int xfs_buf_iorequest(xfs_buf_t *);
 extern int xfs_buf_iowait(xfs_buf_t *);
-extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, xfs_caddr_t,
+extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *,
                                 xfs_buf_rw_t);
 
 static inline int xfs_buf_iostrategy(xfs_buf_t *bp)
@@ -261,6 +265,7 @@ extern int xfs_buf_ispin(xfs_buf_t *);
 
 /* Delayed Write Buffer Routines */
 extern void xfs_buf_delwri_dequeue(xfs_buf_t *);
+extern void xfs_buf_delwri_promote(xfs_buf_t *);
 
 /* Buffer Daemon Setup Routines */
 extern int xfs_buf_init(void);
@@ -270,33 +275,19 @@ extern void xfs_buf_terminate(void);
         ({ char __b[BDEVNAME_SIZE]; bdevname((target)->bt_bdev, __b); __b; })
 
 
-#define XFS_B_ASYNC             XBF_ASYNC
-#define XFS_B_DELWRI            XBF_DELWRI
-#define XFS_B_READ              XBF_READ
-#define XFS_B_WRITE             XBF_WRITE
-#define XFS_B_STALE             XBF_STALE
-
-#define XFS_BUF_TRYLOCK         XBF_TRYLOCK
-#define XFS_INCORE_TRYLOCK      XBF_TRYLOCK
-#define XFS_BUF_LOCK            XBF_LOCK
-#define XFS_BUF_MAPPED          XBF_MAPPED
-
-#define BUF_BUSY                XBF_DONT_BLOCK
-
 #define XFS_BUF_BFLAGS(bp)      ((bp)->b_flags)
 #define XFS_BUF_ZEROFLAGS(bp)   ((bp)->b_flags &= \
                 ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED))
 
-#define XFS_BUF_STALE(bp)       ((bp)->b_flags |= XFS_B_STALE)
-#define XFS_BUF_UNSTALE(bp)     ((bp)->b_flags &= ~XFS_B_STALE)
-#define XFS_BUF_ISSTALE(bp)     ((bp)->b_flags & XFS_B_STALE)
+#define XFS_BUF_STALE(bp)       ((bp)->b_flags |= XBF_STALE)
+#define XFS_BUF_UNSTALE(bp)     ((bp)->b_flags &= ~XBF_STALE)
+#define XFS_BUF_ISSTALE(bp)     ((bp)->b_flags & XBF_STALE)
 #define XFS_BUF_SUPER_STALE(bp) do {                            \
                                         XFS_BUF_STALE(bp);      \
                                         xfs_buf_delwri_dequeue(bp);     \
                                         XFS_BUF_DONE(bp);       \
                                 } while (0)
 
-#define XFS_BUF_MANAGE          XBF_FS_MANAGED
 #define XFS_BUF_UNMANAGE(bp)    ((bp)->b_flags &= ~XBF_FS_MANAGED)
 
 #define XFS_BUF_DELAYWRITE(bp)          ((bp)->b_flags |= XBF_DELWRI)
@@ -385,31 +376,11 @@ static inline void xfs_buf_relse(xfs_buf_t *bp)
 
 #define xfs_biomove(bp, off, len, data, rw) \
             xfs_buf_iomove((bp), (off), (len), (data), \
-                ((rw) == XFS_B_WRITE) ? XBRW_WRITE : XBRW_READ)
+                ((rw) == XBF_WRITE) ? XBRW_WRITE : XBRW_READ)
 
 #define xfs_biozero(bp, off, len) \
             xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO)
 
-
-static inline int XFS_bwrite(xfs_buf_t *bp)
-{
-        int     iowait = (bp->b_flags & XBF_ASYNC) == 0;
-        int     error = 0;
-
-        if (!iowait)
-                bp->b_flags |= _XBF_RUN_QUEUES;
-
-        xfs_buf_delwri_dequeue(bp);
-        xfs_buf_iostrategy(bp);
-        if (iowait) {
-                error = xfs_buf_iowait(bp);
-                xfs_buf_relse(bp);
-        }
-        return error;
-}
-
-#define XFS_bdstrat(bp) xfs_buf_iorequest(bp)
-
 #define xfs_iowait(bp)  xfs_buf_iowait(bp)
 
 #define xfs_baread(target, rablkno, ralen)  \
@@ -424,6 +395,7 @@ extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *);
 extern void xfs_wait_buftarg(xfs_buftarg_t *);
 extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int);
 extern int xfs_flush_buftarg(xfs_buftarg_t *, int);
+
 #ifdef CONFIG_KDB_MODULES
 extern struct list_head *xfs_get_buftarg_list(void);
 #endif
diff --git a/fs/xfs/linux-2.6/xfs_fs_subr.c b/fs/xfs/linux-2.6/xfs_fs_subr.c
index 7501b85fd860..b6918d76bc7b 100644
--- a/fs/xfs/linux-2.6/xfs_fs_subr.c
+++ b/fs/xfs/linux-2.6/xfs_fs_subr.c
@@ -79,7 +79,7 @@ xfs_flush_pages(
                 xfs_iflags_clear(ip, XFS_ITRUNCATED);
                 ret = -filemap_fdatawrite(mapping);
         }
-        if (flags & XFS_B_ASYNC)
+        if (flags & XBF_ASYNC)
                 return ret;
         ret2 = xfs_wait_on_pages(ip, first, last);
         if (!ret)
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index a034cf624437..4ea1ee18aded 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -447,12 +447,12 @@ xfs_attrlist_by_handle(
 int
 xfs_attrmulti_attr_get(
         struct inode            *inode,
-        char                    *name,
-        char                    __user *ubuf,
+        unsigned char           *name,
+        unsigned char           __user *ubuf,
         __uint32_t              *len,
         __uint32_t              flags)
 {
-        char                    *kbuf;
+        unsigned char           *kbuf;
         int                     error = EFAULT;
 
         if (*len > XATTR_SIZE_MAX)
@@ -476,12 +476,12 @@ xfs_attrmulti_attr_get(
 int
 xfs_attrmulti_attr_set(
         struct inode            *inode,
-        char                    *name,
-        const char              __user *ubuf,
+        unsigned char           *name,
+        const unsigned char     __user *ubuf,
         __uint32_t              len,
         __uint32_t              flags)
 {
-        char                    *kbuf;
+        unsigned char           *kbuf;
         int                     error = EFAULT;
 
         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
@@ -501,7 +501,7 @@ xfs_attrmulti_attr_set(
 int
 xfs_attrmulti_attr_remove(
         struct inode            *inode,
-        char                    *name,
+        unsigned char           *name,
         __uint32_t              flags)
 {
         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
@@ -519,7 +519,7 @@ xfs_attrmulti_by_handle(
         xfs_fsop_attrmulti_handlereq_t am_hreq;
         struct dentry           *dentry;
         unsigned int            i, size;
-        char                    *attr_name;
+        unsigned char           *attr_name;
 
         if (!capable(CAP_SYS_ADMIN))
                 return -XFS_ERROR(EPERM);
@@ -547,7 +547,7 @@ xfs_attrmulti_by_handle(
 
         error = 0;
         for (i = 0; i < am_hreq.opcount; i++) {
-                ops[i].am_error = strncpy_from_user(attr_name,
+                ops[i].am_error = strncpy_from_user((char *)attr_name,
                                 ops[i].am_attrname, MAXNAMELEN);
                 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
                         error = -ERANGE;
@@ -1431,6 +1431,9 @@ xfs_file_ioctl(
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
 
+                if (mp->m_flags & XFS_MOUNT_RDONLY)
+                        return -XFS_ERROR(EROFS);
+
                 if (copy_from_user(&inout, arg, sizeof(inout)))
                         return -XFS_ERROR(EFAULT);
 
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.h b/fs/xfs/linux-2.6/xfs_ioctl.h
index 7bd7c6afc1eb..d56173b34a2a 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.h
+++ b/fs/xfs/linux-2.6/xfs_ioctl.h
@@ -45,23 +45,23 @@ xfs_readlink_by_handle(
 extern int
 xfs_attrmulti_attr_get(
         struct inode            *inode,
-        char                    *name,
-        char                    __user *ubuf,
+        unsigned char           *name,
+        unsigned char           __user *ubuf,
         __uint32_t              *len,
         __uint32_t              flags);
 
 extern int
-        xfs_attrmulti_attr_set(
+xfs_attrmulti_attr_set(
         struct inode            *inode,
-        char                    *name,
-        const char              __user *ubuf,
+        unsigned char           *name,
+        const unsigned char     __user *ubuf,
         __uint32_t              len,
         __uint32_t              flags);
 
 extern int
 xfs_attrmulti_attr_remove(
         struct inode            *inode,
-        char                    *name,
+        unsigned char           *name,
         __uint32_t              flags);
 
 extern struct dentry *
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index be1527b1670c..0bf6d61f0528 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -411,7 +411,7 @@ xfs_compat_attrmulti_by_handle(
         compat_xfs_fsop_attrmulti_handlereq_t   am_hreq;
         struct dentry                           *dentry;
         unsigned int                            i, size;
-        char                                    *attr_name;
+        unsigned char                           *attr_name;
 
         if (!capable(CAP_SYS_ADMIN))
                 return -XFS_ERROR(EPERM);
@@ -440,7 +440,7 @@ xfs_compat_attrmulti_by_handle(
 
         error = 0;
         for (i = 0; i < am_hreq.opcount; i++) {
-                ops[i].am_error = strncpy_from_user(attr_name,
+                ops[i].am_error = strncpy_from_user((char *)attr_name,
                                 compat_ptr(ops[i].am_attrname),
                                 MAXNAMELEN);
                 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 225946012d0b..e8566bbf0f00 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -140,10 +140,10 @@ xfs_init_security(
         struct xfs_inode *ip = XFS_I(inode);
         size_t          length;
         void            *value;
-        char            *name;
+        unsigned char   *name;
         int             error;
 
-        error = security_inode_init_security(inode, dir, &name,
+        error = security_inode_init_security(inode, dir, (char **)&name,
                                              &value, &length);
         if (error) {
                 if (error == -EOPNOTSUPP)
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 0d32457abef1..eac6f80d786d 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -630,18 +630,9 @@ start:
          * by root.  This keeps people from modifying setuid and
          * setgid binaries.
          */
-
-        if (((xip->i_d.di_mode & S_ISUID) ||
-            ((xip->i_d.di_mode & (S_ISGID | S_IXGRP)) ==
-                (S_ISGID | S_IXGRP))) &&
-             !capable(CAP_FSETID)) {
-                error = xfs_write_clear_setuid(xip);
-                if (likely(!error))
-                        error = -file_remove_suid(file);
-                if (unlikely(error)) {
-                        goto out_unlock_internal;
-                }
-        }
+        error = -file_remove_suid(file);
+        if (unlikely(error))
+                goto out_unlock_internal;
 
         /* We can write back this queue in page reclaim */
         current->backing_dev_info = mapping->backing_dev_info;
@@ -784,53 +775,6 @@ write_retry:
 }
 
 /*
- * All xfs metadata buffers except log state machine buffers
- * get this attached as their b_bdstrat callback function.
- * This is so that we can catch a buffer
- * after prematurely unpinning it to forcibly shutdown the filesystem.
- */
-int
-xfs_bdstrat_cb(struct xfs_buf *bp)
-{
-        if (XFS_FORCED_SHUTDOWN(bp->b_mount)) {
-                trace_xfs_bdstrat_shut(bp, _RET_IP_);
-                /*
-                 * Metadata write that didn't get logged but
-                 * written delayed anyway. These aren't associated
-                 * with a transaction, and can be ignored.
-                 */
-                if (XFS_BUF_IODONE_FUNC(bp) == NULL &&
-                    (XFS_BUF_ISREAD(bp)) == 0)
-                        return (xfs_bioerror_relse(bp));
-                else
-                        return (xfs_bioerror(bp));
-        }
-
-        xfs_buf_iorequest(bp);
-        return 0;
-}
-
-/*
- * Wrapper around bdstrat so that we can stop data from going to disk in case
- * we are shutting down the filesystem.  Typically user data goes thru this
- * path; one of the exceptions is the superblock.
- */
-void
-xfsbdstrat(
-        struct xfs_mount        *mp,
-        struct xfs_buf          *bp)
-{
-        ASSERT(mp);
-        if (!XFS_FORCED_SHUTDOWN(mp)) {
-                xfs_buf_iorequest(bp);
-                return;
-        }
-
-        trace_xfs_bdstrat_shut(bp, _RET_IP_);
-        xfs_bioerror_relse(bp);
-}
-
-/*
  * If the underlying (data/log/rt) device is readonly, there are some
  * operations that cannot proceed.
  */
diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h
index d1f7789c7ffb..342ae8c0d011 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.h
+++ b/fs/xfs/linux-2.6/xfs_lrw.h
@@ -22,9 +22,6 @@ struct xfs_mount;
 struct xfs_inode;
 struct xfs_buf;
 
-/* errors from xfsbdstrat() must be extracted from the buffer */
-extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
-extern int xfs_bdstrat_cb(struct xfs_buf *);
 extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
 
 extern int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t);
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 77414db10dc2..25ea2408118f 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -877,12 +877,11 @@ xfsaild(
 {
         struct xfs_ail  *ailp = data;
         xfs_lsn_t       last_pushed_lsn = 0;
-        long            tout = 0;
+        long            tout = 0; /* milliseconds */
 
         while (!kthread_should_stop()) {
-                if (tout)
-                        schedule_timeout_interruptible(msecs_to_jiffies(tout));
-                tout = 1000;
+                schedule_timeout_interruptible(tout ?
+                                msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
 
                 /* swsusp */
                 try_to_freeze();
@@ -1022,12 +1021,45 @@ xfs_fs_dirty_inode(
         XFS_I(inode)->i_update_core = 1;
 }
 
-/*
- * Attempt to flush the inode, this will actually fail
- * if the inode is pinned, but we dirty the inode again
- * at the point when it is unpinned after a log write,
- * since this is when the inode itself becomes flushable.
- */
+STATIC int
+xfs_log_inode(
+        struct xfs_inode        *ip)
+{
+        struct xfs_mount        *mp = ip->i_mount;
+        struct xfs_trans        *tp;
+        int                     error;
+
+        xfs_iunlock(ip, XFS_ILOCK_SHARED);
+        tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
+        error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
+
+        if (error) {
+                xfs_trans_cancel(tp, 0);
+                /* we need to return with the lock hold shared */
+                xfs_ilock(ip, XFS_ILOCK_SHARED);
+                return error;
+        }
+
+        xfs_ilock(ip, XFS_ILOCK_EXCL);
+
+        /*
+         * Note - it's possible that we might have pushed ourselves out of the
+         * way during trans_reserve which would flush the inode.  But there's
+         * no guarantee that the inode buffer has actually gone out yet (it's
+         * delwri).  Plus the buffer could be pinned anyway if it's part of
+         * an inode in another recent transaction.  So we play it safe and
+         * fire off the transaction anyway.
+         */
+        xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+        xfs_trans_ihold(tp, ip);
+        xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+        xfs_trans_set_sync(tp);
+        error = xfs_trans_commit(tp, 0);
+        xfs_ilock_demote(ip, XFS_ILOCK_EXCL);
+
+        return error;
+}
+
 STATIC int
 xfs_fs_write_inode(
         struct inode            *inode,
@@ -1035,7 +1067,7 @@ xfs_fs_write_inode(
 {
         struct xfs_inode        *ip = XFS_I(inode);
         struct xfs_mount        *mp = ip->i_mount;
-        int                     error = 0;
+        int                     error = EAGAIN;
 
         xfs_itrace_entry(ip);
 
@@ -1046,35 +1078,55 @@ xfs_fs_write_inode(
                 error = xfs_wait_on_pages(ip, 0, -1);
                 if (error)
                         goto out;
-        }
-
-        /*
-         * Bypass inodes which have already been cleaned by
-         * the inode flush clustering code inside xfs_iflush
-         */
-        if (xfs_inode_clean(ip))
-                goto out;
 
-        /*
-         * We make this non-blocking if the inode is contended, return
-         * EAGAIN to indicate to the caller that they did not succeed.
-         * This prevents the flush path from blocking on inodes inside
-         * another operation right now, they get caught later by xfs_sync.
-         */
-        if (sync) {
+                /*
+                 * Make sure the inode has hit stable storage.  By using the
+                 * log and the fsync transactions we reduce the IOs we have
+                 * to do here from two (log and inode) to just the log.
+                 *
+                 * Note: We still need to do a delwri write of the inode after
+                 * this to flush it to the backing buffer so that bulkstat
+                 * works properly if this is the first time the inode has been
+                 * written.  Because we hold the ilock atomically over the
+                 * transaction commit and the inode flush we are guaranteed
+                 * that the inode is not pinned when it returns. If the flush
+                 * lock is already held, then the inode has already been
+                 * flushed once and we don't need to flush it again.  Hence
+                 * the code will only flush the inode if it isn't already
+                 * being flushed.
+                 */
                 xfs_ilock(ip, XFS_ILOCK_SHARED);
-                xfs_iflock(ip);
-
-                error = xfs_iflush(ip, XFS_IFLUSH_SYNC);
+                if (ip->i_update_core) {
+                        error = xfs_log_inode(ip);
+                        if (error)
+                                goto out_unlock;
+                }
         } else {
-                error = EAGAIN;
+                /*
+                 * We make this non-blocking if the inode is contended, return
+                 * EAGAIN to indicate to the caller that they did not succeed.
+                 * This prevents the flush path from blocking on inodes inside
+                 * another operation right now, they get caught later by xfs_sync.
+                 */
                 if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED))
                         goto out;
-                if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
-                        goto out_unlock;
+        }
 
-                error = xfs_iflush(ip, XFS_IFLUSH_ASYNC_NOBLOCK);
+        if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip))
+                goto out_unlock;
+
+        /*
+         * Now we have the flush lock and the inode is not pinned, we can check
+         * if the inode is really clean as we know that there are no pending
+         * transaction completions, it is not waiting on the delayed write
+         * queue and there is no IO in progress.
+         */
+        if (xfs_inode_clean(ip)) {
+                xfs_ifunlock(ip);
+                error = 0;
+                goto out_unlock;
         }
+        error = xfs_iflush(ip, 0);
 
  out_unlock:
         xfs_iunlock(ip, XFS_ILOCK_SHARED);
@@ -1257,6 +1309,29 @@ xfs_fs_statfs(
         return 0;
 }
 
+STATIC void
+xfs_save_resvblks(struct xfs_mount *mp)
+{
+        __uint64_t resblks = 0;
+
+        mp->m_resblks_save = mp->m_resblks;
+        xfs_reserve_blocks(mp, &resblks, NULL);
+}
+
+STATIC void
+xfs_restore_resvblks(struct xfs_mount *mp)
+{
+        __uint64_t resblks;
+
+        if (mp->m_resblks_save) {
+                resblks = mp->m_resblks_save;
+                mp->m_resblks_save = 0;
+        } else
+                resblks = xfs_default_resblks(mp);
+
+        xfs_reserve_blocks(mp, &resblks, NULL);
+}
+
 STATIC int
 xfs_fs_remount(
         struct super_block      *sb,
@@ -1336,11 +1411,27 @@ xfs_fs_remount(
                         }
                         mp->m_update_flags = 0;
                 }
+
+                /*
+                 * Fill out the reserve pool if it is empty. Use the stashed
+                 * value if it is non-zero, otherwise go with the default.
+                 */
+                xfs_restore_resvblks(mp);
         }
 
         /* rw -> ro */
         if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
+                /*
+                 * After we have synced the data but before we sync the
+                 * metadata, we need to free up the reserve block pool so that
+                 * the used block count in the superblock on disk is correct at
+                 * the end of the remount. Stash the current reserve pool size
+                 * so that if we get remounted rw, we can return it to the same
+                 * size.
+                 */
+
                 xfs_quiesce_data(mp);
+                xfs_save_resvblks(mp);
                 xfs_quiesce_attr(mp);
                 mp->m_flags |= XFS_MOUNT_RDONLY;
         }
@@ -1359,11 +1450,22 @@ xfs_fs_freeze(
 {
         struct xfs_mount        *mp = XFS_M(sb);
 
+        xfs_save_resvblks(mp);
         xfs_quiesce_attr(mp);
         return -xfs_fs_log_dummy(mp);
 }
 
 STATIC int
+xfs_fs_unfreeze(
+        struct super_block      *sb)
+{
+        struct xfs_mount        *mp = XFS_M(sb);
+
+        xfs_restore_resvblks(mp);
+        return 0;
+}
+
+STATIC int
 xfs_fs_show_options(
         struct seq_file         *m,
         struct vfsmount         *mnt)
@@ -1585,6 +1687,7 @@ static const struct super_operations xfs_super_operations = {
         .put_super              = xfs_fs_put_super,
         .sync_fs                = xfs_fs_sync_fs,
         .freeze_fs              = xfs_fs_freeze,
+        .unfreeze_fs            = xfs_fs_unfreeze,
         .statfs                 = xfs_fs_statfs,
         .remount_fs             = xfs_fs_remount,
         .show_options           = xfs_fs_show_options,
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index 1f5e4bb5e970..a9f6d20aff41 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -90,14 +90,13 @@ xfs_inode_ag_lookup(
 STATIC int
 xfs_inode_ag_walk(
         struct xfs_mount        *mp,
-        xfs_agnumber_t          ag,
+        struct xfs_perag        *pag,
         int                     (*execute)(struct xfs_inode *ip,
                                            struct xfs_perag *pag, int flags),
         int                     flags,
         int                     tag,
         int                     exclusive)
 {
-        struct xfs_perag        *pag = &mp->m_perag[ag];
         uint32_t                first_index;
         int                     last_error = 0;
         int                     skipped;
@@ -141,8 +140,6 @@ restart:
                 delay(1);
                 goto restart;
         }
-
-        xfs_put_perag(mp, pag);
         return last_error;
 }
 
@@ -160,10 +157,16 @@ xfs_inode_ag_iterator(
         xfs_agnumber_t          ag;
 
         for (ag = 0; ag < mp->m_sb.sb_agcount; ag++) {
-                if (!mp->m_perag[ag].pag_ici_init)
+                struct xfs_perag        *pag;
+
+                pag = xfs_perag_get(mp, ag);
+                if (!pag->pag_ici_init) {
+                        xfs_perag_put(pag);
                         continue;
-                error = xfs_inode_ag_walk(mp, ag, execute, flags, tag,
+                }
+                error = xfs_inode_ag_walk(mp, pag, execute, flags, tag,
                                                 exclusive);
+                xfs_perag_put(pag);
                 if (error) {
                         last_error = error;
                         if (error == EFSCORRUPTED)
@@ -231,7 +234,7 @@ xfs_sync_inode_data(
         }
 
         error = xfs_flush_pages(ip, 0, -1, (flags & SYNC_WAIT) ?
-                                0 : XFS_B_ASYNC, FI_NONE);
+                                0 : XBF_ASYNC, FI_NONE);
         xfs_iunlock(ip, XFS_IOLOCK_SHARED);
 
  out_wait:
@@ -267,8 +270,7 @@ xfs_sync_inode_attr(
                 goto out_unlock;
         }
 
-        error = xfs_iflush(ip, (flags & SYNC_WAIT) ?
-                           XFS_IFLUSH_SYNC : XFS_IFLUSH_DELWRI);
+        error = xfs_iflush(ip, flags);
 
  out_unlock:
         xfs_iunlock(ip, XFS_ILOCK_SHARED);
@@ -293,10 +295,7 @@ xfs_sync_data(
         if (error)
                 return XFS_ERROR(error);
 
-        xfs_log_force(mp, 0,
-                      (flags & SYNC_WAIT) ?
-                       XFS_LOG_FORCE | XFS_LOG_SYNC :
-                       XFS_LOG_FORCE);
+        xfs_log_force(mp, (flags & SYNC_WAIT) ? XFS_LOG_SYNC : 0);
         return 0;
 }
 
@@ -322,10 +321,6 @@ xfs_commit_dummy_trans(
         struct xfs_inode        *ip = mp->m_rootip;
         struct xfs_trans        *tp;
         int                     error;
-        int                     log_flags = XFS_LOG_FORCE;
-
-        if (flags & SYNC_WAIT)
-                log_flags |= XFS_LOG_SYNC;
 
         /*
          * Put a dummy transaction in the log to tell recovery
@@ -347,11 +342,11 @@ xfs_commit_dummy_trans(
         xfs_iunlock(ip, XFS_ILOCK_EXCL);
 
         /* the log force ensures this transaction is pushed to disk */
-        xfs_log_force(mp, 0, log_flags);
+        xfs_log_force(mp, (flags & SYNC_WAIT) ? XFS_LOG_SYNC : 0);
         return error;
 }
 
-int
+STATIC int
 xfs_sync_fsdata(
         struct xfs_mount        *mp,
         int                     flags)
@@ -367,7 +362,7 @@ xfs_sync_fsdata(
         if (flags & SYNC_TRYLOCK) {
                 ASSERT(!(flags & SYNC_WAIT));
 
-                bp = xfs_getsb(mp, XFS_BUF_TRYLOCK);
+                bp = xfs_getsb(mp, XBF_TRYLOCK);
                 if (!bp)
                         goto out;
 
@@ -387,7 +382,7 @@ xfs_sync_fsdata(
                  * become pinned in between there and here.
                  */
                 if (XFS_BUF_ISPINNED(bp))
-                        xfs_log_force(mp, 0, XFS_LOG_FORCE);
+                        xfs_log_force(mp, 0);
         }
 
 
@@ -448,9 +443,6 @@ xfs_quiesce_data(
         xfs_sync_data(mp, SYNC_WAIT);
         xfs_qm_sync(mp, SYNC_WAIT);
 
-        /* drop inode references pinned by filestreams */
-        xfs_filestream_flush(mp);
-
         /* write superblock and hoover up shutdown errors */
         error = xfs_sync_fsdata(mp, SYNC_WAIT);
 
@@ -467,16 +459,18 @@ xfs_quiesce_fs(
 {
         int     count = 0, pincount;
 
+        xfs_reclaim_inodes(mp, 0);
         xfs_flush_buftarg(mp->m_ddev_targp, 0);
-        xfs_reclaim_inodes(mp, XFS_IFLUSH_DELWRI_ELSE_ASYNC);
 
         /*
          * This loop must run at least twice.  The first instance of the loop
          * will flush most meta data but that will generate more meta data
          * (typically directory updates).  Which then must be flushed and
-         * logged before we can write the unmount record.
+         * logged before we can write the unmount record. We also so sync
+         * reclaim of inodes to catch any that the above delwri flush skipped.
          */
         do {
+                xfs_reclaim_inodes(mp, SYNC_WAIT);
                 xfs_sync_attr(mp, SYNC_WAIT);
                 pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
                 if (!pincount) {
@@ -575,7 +569,7 @@ xfs_flush_inodes(
         igrab(inode);
         xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work, &completion);
         wait_for_completion(&completion);
-        xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
+        xfs_log_force(ip->i_mount, XFS_LOG_SYNC);
 }
 
 /*
@@ -591,8 +585,8 @@ xfs_sync_worker(
         int             error;
 
         if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
-                xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
-                xfs_reclaim_inodes(mp, XFS_IFLUSH_DELWRI_ELSE_ASYNC);
+                xfs_log_force(mp, 0);
+                xfs_reclaim_inodes(mp, 0);
                 /* dgc: errors ignored here */
                 error = xfs_qm_sync(mp, SYNC_TRYLOCK);
                 error = xfs_sync_fsdata(mp, SYNC_TRYLOCK);
@@ -690,16 +684,17 @@ void
 xfs_inode_set_reclaim_tag(
         xfs_inode_t     *ip)
 {
-        xfs_mount_t     *mp = ip->i_mount;
-        xfs_perag_t     *pag = xfs_get_perag(mp, ip->i_ino);
+        struct xfs_mount *mp = ip->i_mount;
+        struct xfs_perag *pag;
 
+        pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
         read_lock(&pag->pag_ici_lock);
         spin_lock(&ip->i_flags_lock);
         __xfs_inode_set_reclaim_tag(pag, ip);
         __xfs_iflags_set(ip, XFS_IRECLAIMABLE);
         spin_unlock(&ip->i_flags_lock);
         read_unlock(&pag->pag_ici_lock);
-        xfs_put_perag(mp, pag);
+        xfs_perag_put(pag);
 }
 
 void
@@ -712,12 +707,64 @@ __xfs_inode_clear_reclaim_tag(
                         XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG);
 }
 
+/*
+ * Inodes in different states need to be treated differently, and the return
+ * value of xfs_iflush is not sufficient to get this right. The following table
+ * lists the inode states and the reclaim actions necessary for non-blocking
+ * reclaim:
+ *
+ *
+ *      inode state          iflush ret         required action
+ *      ---------------      ----------         ---------------
+ *      bad                     -               reclaim
+ *      shutdown                EIO             unpin and reclaim
+ *      clean, unpinned         0               reclaim
+ *      stale, unpinned         0               reclaim
+ *      clean, pinned(*)        0               requeue
+ *      stale, pinned           EAGAIN          requeue
+ *      dirty, delwri ok        0               requeue
+ *      dirty, delwri blocked   EAGAIN          requeue
+ *      dirty, sync flush       0               reclaim
+ *
+ * (*) dgc: I don't think the clean, pinned state is possible but it gets
+ * handled anyway given the order of checks implemented.
+ *
+ * As can be seen from the table, the return value of xfs_iflush() is not
+ * sufficient to correctly decide the reclaim action here. The checks in
+ * xfs_iflush() might look like duplicates, but they are not.
+ *
+ * Also, because we get the flush lock first, we know that any inode that has
+ * been flushed delwri has had the flush completed by the time we check that
+ * the inode is clean. The clean inode check needs to be done before flushing
+ * the inode delwri otherwise we would loop forever requeuing clean inodes as
+ * we cannot tell apart a successful delwri flush and a clean inode from the
+ * return value of xfs_iflush().
+ *
+ * Note that because the inode is flushed delayed write by background
+ * writeback, the flush lock may already be held here and waiting on it can
+ * result in very long latencies. Hence for sync reclaims, where we wait on the
+ * flush lock, the caller should push out delayed write inodes first before
+ * trying to reclaim them to minimise the amount of time spent waiting. For
+ * background relaim, we just requeue the inode for the next pass.
+ *
+ * Hence the order of actions after gaining the locks should be:
+ *      bad             => reclaim
+ *      shutdown        => unpin and reclaim
+ *      pinned, delwri  => requeue
+ *      pinned, sync    => unpin
+ *      stale           => reclaim
+ *      clean           => reclaim
+ *      dirty, delwri   => flush and requeue
+ *      dirty, sync     => flush, wait and reclaim
+ */
 STATIC int
 xfs_reclaim_inode(
         struct xfs_inode        *ip,
         struct xfs_perag        *pag,
         int                     sync_mode)
 {
+        int     error = 0;
+
         /*
          * The radix tree lock here protects a thread in xfs_iget from racing
          * with us starting reclaim on the inode.  Once we have the
@@ -735,33 +782,70 @@ xfs_reclaim_inode(
         spin_unlock(&ip->i_flags_lock);
         write_unlock(&pag->pag_ici_lock);
 
-        /*
-         * If the inode is still dirty, then flush it out.  If the inode
-         * is not in the AIL, then it will be OK to flush it delwri as
-         * long as xfs_iflush() does not keep any references to the inode.
-         * We leave that decision up to xfs_iflush() since it has the
-         * knowledge of whether it's OK to simply do a delwri flush of
-         * the inode or whether we need to wait until the inode is
-         * pulled from the AIL.
-         * We get the flush lock regardless, though, just to make sure
-         * we don't free it while it is being flushed.
-         */
         xfs_ilock(ip, XFS_ILOCK_EXCL);
-        xfs_iflock(ip);
+        if (!xfs_iflock_nowait(ip)) {
+                if (!(sync_mode & SYNC_WAIT))
+                        goto out;
+                xfs_iflock(ip);
+        }
+
+        if (is_bad_inode(VFS_I(ip)))
+                goto reclaim;
+        if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
+                xfs_iunpin_wait(ip);
+                goto reclaim;
+        }
+        if (xfs_ipincount(ip)) {
+                if (!(sync_mode & SYNC_WAIT)) {
+                        xfs_ifunlock(ip);
+                        goto out;
+                }
+                xfs_iunpin_wait(ip);
+        }
+        if (xfs_iflags_test(ip, XFS_ISTALE))
+                goto reclaim;
+        if (xfs_inode_clean(ip))
+                goto reclaim;
+
+        /* Now we have an inode that needs flushing */
+        error = xfs_iflush(ip, sync_mode);
+        if (sync_mode & SYNC_WAIT) {
+                xfs_iflock(ip);
+                goto reclaim;
+        }
 
         /*
-         * In the case of a forced shutdown we rely on xfs_iflush() to
-         * wait for the inode to be unpinned before returning an error.
+         * When we have to flush an inode but don't have SYNC_WAIT set, we
+         * flush the inode out using a delwri buffer and wait for the next
+         * call into reclaim to find it in a clean state instead of waiting for
+         * it now. We also don't return errors here - if the error is transient
+         * then the next reclaim pass will flush the inode, and if the error
+         * is permanent then the next sync reclaim will relcaim the inode and
+         * pass on the error.
          */
-        if (!is_bad_inode(VFS_I(ip)) && xfs_iflush(ip, sync_mode) == 0) {
-                /* synchronize with xfs_iflush_done */
-                xfs_iflock(ip);
-                xfs_ifunlock(ip);
+        if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount)) {
+                xfs_fs_cmn_err(CE_WARN, ip->i_mount,
+                        "inode 0x%llx background reclaim flush failed with %d",
+                        (long long)ip->i_ino, error);
         }
+out:
+        xfs_iflags_clear(ip, XFS_IRECLAIM);
+        xfs_iunlock(ip, XFS_ILOCK_EXCL);
+        /*
+         * We could return EAGAIN here to make reclaim rescan the inode tree in
+         * a short while. However, this just burns CPU time scanning the tree
+         * waiting for IO to complete and xfssyncd never goes back to the idle
+         * state. Instead, return 0 to let the next scheduled background reclaim
+         * attempt to reclaim the inode again.
+         */
+        return 0;
 
+reclaim:
+        xfs_ifunlock(ip);
         xfs_iunlock(ip, XFS_ILOCK_EXCL);
         xfs_ireclaim(ip);
-        return 0;
+        return error;
+
 }
 
 int
diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h
index ea932b43335d..d480c346cabb 100644
--- a/fs/xfs/linux-2.6/xfs_sync.h
+++ b/fs/xfs/linux-2.6/xfs_sync.h
@@ -37,7 +37,6 @@ void xfs_syncd_stop(struct xfs_mount *mp);
 
 int xfs_sync_attr(struct xfs_mount *mp, int flags);
 int xfs_sync_data(struct xfs_mount *mp, int flags);
-int xfs_sync_fsdata(struct xfs_mount *mp, int flags);
 
 int xfs_quiesce_data(struct xfs_mount *mp);
 void xfs_quiesce_attr(struct xfs_mount *mp);
diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h
index c22a608321a3..a4574dcf5065 100644
--- a/fs/xfs/linux-2.6/xfs_trace.h
+++ b/fs/xfs/linux-2.6/xfs_trace.h
@@ -78,6 +78,33 @@ DECLARE_EVENT_CLASS(xfs_attr_list_class,
         )
 )
 
+#define DEFINE_PERAG_REF_EVENT(name) \
+TRACE_EVENT(name, \
+        TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, int refcount, \
+                 unsigned long caller_ip), \
+        TP_ARGS(mp, agno, refcount, caller_ip), \
+        TP_STRUCT__entry( \
+                __field(dev_t, dev) \
+                __field(xfs_agnumber_t, agno) \
+                __field(int, refcount) \
+                __field(unsigned long, caller_ip) \
+        ), \
+        TP_fast_assign( \
+                __entry->dev = mp->m_super->s_dev; \
+                __entry->agno = agno; \
+                __entry->refcount = refcount; \
+                __entry->caller_ip = caller_ip; \
+        ), \
+        TP_printk("dev %d:%d agno %u refcount %d caller %pf", \
+                  MAJOR(__entry->dev), MINOR(__entry->dev), \
+                  __entry->agno, \
+                  __entry->refcount, \
+                  (char *)__entry->caller_ip) \
+);
+
+DEFINE_PERAG_REF_EVENT(xfs_perag_get)
+DEFINE_PERAG_REF_EVENT(xfs_perag_put)
+
 #define DEFINE_ATTR_LIST_EVENT(name) \
 DEFINE_EVENT(xfs_attr_list_class, name, \
         TP_PROTO(struct xfs_attr_list_context *ctx), \
@@ -456,6 +483,7 @@ DEFINE_BUF_ITEM_EVENT(xfs_buf_item_unlock);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_unlock_stale);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_committed);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_push);
+DEFINE_BUF_ITEM_EVENT(xfs_buf_item_pushbuf);
 DEFINE_BUF_ITEM_EVENT(xfs_trans_get_buf);
 DEFINE_BUF_ITEM_EVENT(xfs_trans_get_buf_recur);
 DEFINE_BUF_ITEM_EVENT(xfs_trans_getsb);
@@ -1414,6 +1442,59 @@ TRACE_EVENT(xfs_dir2_leafn_moveents,
                   __entry->count)
 );
 
+#define XFS_SWAPEXT_INODES \
+        { 0,    "target" }, \
+        { 1,    "temp" }
+
+#define XFS_INODE_FORMAT_STR \
+        { 0,    "invalid" }, \
+        { 1,    "local" }, \
+        { 2,    "extent" }, \
+        { 3,    "btree" }
+
+DECLARE_EVENT_CLASS(xfs_swap_extent_class,
+        TP_PROTO(struct xfs_inode *ip, int which),
+        TP_ARGS(ip, which),
+        TP_STRUCT__entry(
+                __field(dev_t, dev)
+                __field(int, which)
+                __field(xfs_ino_t, ino)
+                __field(int, format)
+                __field(int, nex)
+                __field(int, max_nex)
+                __field(int, broot_size)
+                __field(int, fork_off)
+        ),
+        TP_fast_assign(
+                __entry->dev = VFS_I(ip)->i_sb->s_dev;
+                __entry->which = which;
+                __entry->ino = ip->i_ino;
+                __entry->format = ip->i_d.di_format;
+                __entry->nex = ip->i_d.di_nextents;
+                __entry->max_nex = ip->i_df.if_ext_max;
+                __entry->broot_size = ip->i_df.if_broot_bytes;
+                __entry->fork_off = XFS_IFORK_BOFF(ip);
+        ),
+        TP_printk("dev %d:%d ino 0x%llx (%s), %s format, num_extents %d, "
+                  "Max in-fork extents %d, broot size %d, fork offset %d",
+                  MAJOR(__entry->dev), MINOR(__entry->dev),
+                  __entry->ino,
+                  __print_symbolic(__entry->which, XFS_SWAPEXT_INODES),
+                  __print_symbolic(__entry->format, XFS_INODE_FORMAT_STR),
+                  __entry->nex,
+                  __entry->max_nex,
+                  __entry->broot_size,
+                  __entry->fork_off)
+)
+
+#define DEFINE_SWAPEXT_EVENT(name) \
+DEFINE_EVENT(xfs_swap_extent_class, name, \
+        TP_PROTO(struct xfs_inode *ip, int which), \
+        TP_ARGS(ip, which))
+
+DEFINE_SWAPEXT_EVENT(xfs_swap_extent_before);
+DEFINE_SWAPEXT_EVENT(xfs_swap_extent_after);
+
 #endif /* _TRACE_XFS_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/fs/xfs/linux-2.6/xfs_xattr.c b/fs/xfs/linux-2.6/xfs_xattr.c
index 0b1878857fc3..fa01b9daba6b 100644
--- a/fs/xfs/linux-2.6/xfs_xattr.c
+++ b/fs/xfs/linux-2.6/xfs_xattr.c
@@ -45,7 +45,7 @@ xfs_xattr_get(struct dentry *dentry, const char *name,
                 value = NULL;
         }
 
-        error = -xfs_attr_get(ip, name, value, &asize, xflags);
+        error = -xfs_attr_get(ip, (unsigned char *)name, value, &asize, xflags);
         if (error)
                 return error;
         return asize;
@@ -67,8 +67,9 @@ xfs_xattr_set(struct dentry *dentry, const char *name, const void *value,
                 xflags |= ATTR_REPLACE;
 
         if (!value)
-                return -xfs_attr_remove(ip, name, xflags);
-        return -xfs_attr_set(ip, name, (void *)value, size, xflags);
+                return -xfs_attr_remove(ip, (unsigned char *)name, xflags);
+        return -xfs_attr_set(ip, (unsigned char *)name,
+                                (void *)value, size, xflags);
 }
 
 static struct xattr_handler xfs_xattr_user_handler = {
@@ -124,8 +125,13 @@ static const char *xfs_xattr_prefix(int flags)
 }
 
 static int
-xfs_xattr_put_listent(struct xfs_attr_list_context *context, int flags,
-                char *name, int namelen, int valuelen, char *value)
+xfs_xattr_put_listent(
+        struct xfs_attr_list_context *context,
+        int             flags,
+        unsigned char   *name,
+        int             namelen,
+        int             valuelen,
+        unsigned char   *value)
 {
         unsigned int prefix_len = xfs_xattr_prefix_len(flags);
         char *offset;
@@ -148,7 +154,7 @@ xfs_xattr_put_listent(struct xfs_attr_list_context *context, int flags,
         offset = (char *)context->alist + context->count;
         strncpy(offset, xfs_xattr_prefix(flags), prefix_len);
         offset += prefix_len;
-        strncpy(offset, name, namelen);                 /* real name */
+        strncpy(offset, (char *)name, namelen);                 /* real name */
         offset += namelen;
         *offset = '\0';
         context->count += prefix_len + namelen + 1;
@@ -156,8 +162,13 @@ xfs_xattr_put_listent(struct xfs_attr_list_context *context, int flags,
 }
 
 static int
-xfs_xattr_put_listent_sizes(struct xfs_attr_list_context *context, int flags,
-                char *name, int namelen, int valuelen, char *value)
+xfs_xattr_put_listent_sizes(
+        struct xfs_attr_list_context *context,
+        int             flags,
+        unsigned char   *name,
+        int             namelen,
+        int             valuelen,
+        unsigned char   *value)
 {
         context->count += xfs_xattr_prefix_len(flags) + namelen + 1;
         return 0;
diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c
index d7c7eea09fc2..5f79dd78626b 100644
--- a/fs/xfs/quota/xfs_dquot.c
+++ b/fs/xfs/quota/xfs_dquot.c
@@ -1187,7 +1187,7 @@ xfs_qm_dqflush(
          * block, nada.
          */
         if (!XFS_DQ_IS_DIRTY(dqp) ||
-            (!(flags & XFS_QMOPT_SYNC) && atomic_read(&dqp->q_pincount) > 0)) {
+            (!(flags & SYNC_WAIT) && atomic_read(&dqp->q_pincount) > 0)) {
                 xfs_dqfunlock(dqp);
                 return 0;
         }
@@ -1248,23 +1248,20 @@ xfs_qm_dqflush(
          */
         if (XFS_BUF_ISPINNED(bp)) {
                 trace_xfs_dqflush_force(dqp);
-                xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
+                xfs_log_force(mp, 0);
         }
 
-        if (flags & XFS_QMOPT_DELWRI) {
-                xfs_bdwrite(mp, bp);
-        } else if (flags & XFS_QMOPT_ASYNC) {
-                error = xfs_bawrite(mp, bp);
-        } else {
+        if (flags & SYNC_WAIT)
                 error = xfs_bwrite(mp, bp);
-        }
+        else
+                xfs_bdwrite(mp, bp);
 
         trace_xfs_dqflush_done(dqp);
 
         /*
          * dqp is still locked, but caller is free to unlock it now.
          */
-        return (error);
+        return error;
 
 }
 
@@ -1445,7 +1442,7 @@ xfs_qm_dqpurge(
                  * We don't care about getting disk errors here. We need
                  * to purge this dquot anyway, so we go ahead regardless.
                  */
-                error = xfs_qm_dqflush(dqp, XFS_QMOPT_SYNC);
+                error = xfs_qm_dqflush(dqp, SYNC_WAIT);
                 if (error)
                         xfs_fs_cmn_err(CE_WARN, mp,
                                 "xfs_qm_dqpurge: dquot %p flush failed", dqp);
@@ -1529,25 +1526,17 @@ xfs_qm_dqflock_pushbuf_wait(
          * the flush lock when the I/O completes.
          */
         bp = xfs_incore(dqp->q_mount->m_ddev_targp, dqp->q_blkno,
-                    XFS_QI_DQCHUNKLEN(dqp->q_mount),
-                    XFS_INCORE_TRYLOCK);
-        if (bp != NULL) {
-                if (XFS_BUF_ISDELAYWRITE(bp)) {
-                        int     error;
-                        if (XFS_BUF_ISPINNED(bp)) {
-                                xfs_log_force(dqp->q_mount,
-                                              (xfs_lsn_t)0,
-                                              XFS_LOG_FORCE);
-                        }
-                        error = xfs_bawrite(dqp->q_mount, bp);
-                        if (error)
-                                xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
-                                        "xfs_qm_dqflock_pushbuf_wait: "
-                                        "pushbuf error %d on dqp %p, bp %p",
-                                        error, dqp, bp);
-                } else {
-                        xfs_buf_relse(bp);
-                }
+                    XFS_QI_DQCHUNKLEN(dqp->q_mount), XBF_TRYLOCK);
+        if (!bp)
+                goto out_lock;
+
+        if (XFS_BUF_ISDELAYWRITE(bp)) {
+                if (XFS_BUF_ISPINNED(bp))
+                        xfs_log_force(dqp->q_mount, 0);
+                xfs_buf_delwri_promote(bp);
+                wake_up_process(bp->b_target->bt_task);
         }
+        xfs_buf_relse(bp);
+out_lock:
         xfs_dqflock(dqp);
 }
diff --git a/fs/xfs/quota/xfs_dquot_item.c b/fs/xfs/quota/xfs_dquot_item.c
index d0d4a9a0bbd7..4e4ee9a57194 100644
--- a/fs/xfs/quota/xfs_dquot_item.c
+++ b/fs/xfs/quota/xfs_dquot_item.c
@@ -74,11 +74,11 @@ xfs_qm_dquot_logitem_format(
 
         logvec->i_addr = (xfs_caddr_t)&logitem->qli_format;
         logvec->i_len  = sizeof(xfs_dq_logformat_t);
-        XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_QFORMAT);
+        logvec->i_type = XLOG_REG_TYPE_QFORMAT;
         logvec++;
         logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core;
         logvec->i_len  = sizeof(xfs_disk_dquot_t);
-        XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_DQUOT);
+        logvec->i_type = XLOG_REG_TYPE_DQUOT;
 
         ASSERT(2 == logitem->qli_item.li_desc->lid_size);
         logitem->qli_format.qlf_size = 2;
@@ -153,7 +153,7 @@ xfs_qm_dquot_logitem_push(
          * lock without sleeping, then there must not have been
          * anyone in the process of flushing the dquot.
          */
-        error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
+        error = xfs_qm_dqflush(dqp, 0);
         if (error)
                 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
                         "xfs_qm_dquot_logitem_push: push error %d on dqp %p",
@@ -190,7 +190,7 @@ xfs_qm_dqunpin_wait(
         /*
          * Give the log a push so we don't wait here too long.
          */
-        xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE);
+        xfs_log_force(dqp->q_mount, 0);
         wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
 }
 
@@ -212,68 +212,31 @@ xfs_qm_dquot_logitem_pushbuf(
         xfs_dquot_t     *dqp;
         xfs_mount_t     *mp;
         xfs_buf_t       *bp;
-        uint            dopush;
 
         dqp = qip->qli_dquot;
         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 
         /*
-         * The qli_pushbuf_flag keeps others from
-         * trying to duplicate our effort.
-         */
-        ASSERT(qip->qli_pushbuf_flag != 0);
-        ASSERT(qip->qli_push_owner == current_pid());
-
-        /*
          * If flushlock isn't locked anymore, chances are that the
          * inode flush completed and the inode was taken off the AIL.
          * So, just get out.
          */
         if (completion_done(&dqp->q_flush)  ||
             ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
-                qip->qli_pushbuf_flag = 0;
                 xfs_dqunlock(dqp);
                 return;
         }
         mp = dqp->q_mount;
         bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
-                    XFS_QI_DQCHUNKLEN(mp),
-                    XFS_INCORE_TRYLOCK);
-        if (bp != NULL) {
-                if (XFS_BUF_ISDELAYWRITE(bp)) {
-                        dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
-                                  !completion_done(&dqp->q_flush));
-                        qip->qli_pushbuf_flag = 0;
-                        xfs_dqunlock(dqp);
-
-                        if (XFS_BUF_ISPINNED(bp)) {
-                                xfs_log_force(mp, (xfs_lsn_t)0,
-                                              XFS_LOG_FORCE);
-                        }
-                        if (dopush) {
-                                int     error;
-#ifdef XFSRACEDEBUG
-                                delay_for_intr();
-                                delay(300);
-#endif
-                                error = xfs_bawrite(mp, bp);
-                                if (error)
-                                        xfs_fs_cmn_err(CE_WARN, mp,
-        "xfs_qm_dquot_logitem_pushbuf: pushbuf error %d on qip %p, bp %p",
-                                                        error, qip, bp);
-                        } else {
-                                xfs_buf_relse(bp);
-                        }
-                } else {
-                        qip->qli_pushbuf_flag = 0;
-                        xfs_dqunlock(dqp);
-                        xfs_buf_relse(bp);
-                }
+                    XFS_QI_DQCHUNKLEN(mp), XBF_TRYLOCK);
+        xfs_dqunlock(dqp);
+        if (!bp)
                 return;
-        }
+        if (XFS_BUF_ISDELAYWRITE(bp))
+                xfs_buf_delwri_promote(bp);
+        xfs_buf_relse(bp);
+        return;
 
-        qip->qli_pushbuf_flag = 0;
-        xfs_dqunlock(dqp);
 }
 
 /*
@@ -291,50 +254,24 @@ xfs_qm_dquot_logitem_trylock(
         xfs_dq_logitem_t        *qip)
 {
         xfs_dquot_t             *dqp;
-        uint                    retval;
 
         dqp = qip->qli_dquot;
         if (atomic_read(&dqp->q_pincount) > 0)
-                return (XFS_ITEM_PINNED);
+                return XFS_ITEM_PINNED;
 
         if (! xfs_qm_dqlock_nowait(dqp))
-                return (XFS_ITEM_LOCKED);
+                return XFS_ITEM_LOCKED;
 
-        retval = XFS_ITEM_SUCCESS;
         if (!xfs_dqflock_nowait(dqp)) {
                 /*
-                 * The dquot is already being flushed.  It may have been
-                 * flushed delayed write, however, and we don't want to
-                 * get stuck waiting for that to complete.  So, we want to check
-                 * to see if we can lock the dquot's buffer without sleeping.
-                 * If we can and it is marked for delayed write, then we
-                 * hold it and send it out from the push routine.  We don't
-                 * want to do that now since we might sleep in the device
-                 * strategy routine.  We also don't want to grab the buffer lock
-                 * here because we'd like not to call into the buffer cache
-                 * while holding the AIL lock.
-                 * Make sure to only return PUSHBUF if we set pushbuf_flag
-                 * ourselves.  If someone else is doing it then we don't
-                 * want to go to the push routine and duplicate their efforts.
+                 * dquot has already been flushed to the backing buffer,
+                 * leave it locked, pushbuf routine will unlock it.
                  */
-                if (qip->qli_pushbuf_flag == 0) {
-                        qip->qli_pushbuf_flag = 1;
-                        ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno);
-#ifdef DEBUG
-                        qip->qli_push_owner = current_pid();
-#endif
-                        /*
-                         * The dquot is left locked.
-                         */
-                        retval = XFS_ITEM_PUSHBUF;
-                } else {
-                        retval = XFS_ITEM_FLUSHING;
-                        xfs_dqunlock_nonotify(dqp);
-                }
+                return XFS_ITEM_PUSHBUF;
         }
 
         ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
-        return (retval);
+        return XFS_ITEM_SUCCESS;
 }
 
 
@@ -467,7 +404,7 @@ xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t	*qf,
 
         log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
         log_vector->i_len = sizeof(xfs_qoff_logitem_t);
-        XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF);
+        log_vector->i_type = XLOG_REG_TYPE_QUOTAOFF;
         qf->qql_format.qf_size = 1;
 }
 
diff --git a/fs/xfs/quota/xfs_dquot_item.h b/fs/xfs/quota/xfs_dquot_item.h
index 5a632531f843..5acae2ada70b 100644
--- a/fs/xfs/quota/xfs_dquot_item.h
+++ b/fs/xfs/quota/xfs_dquot_item.h
@@ -27,10 +27,6 @@ typedef struct xfs_dq_logitem {
         xfs_log_item_t           qli_item;         /* common portion */
         struct xfs_dquot        *qli_dquot;        /* dquot ptr */
         xfs_lsn_t                qli_flush_lsn;    /* lsn at last flush */
-        unsigned short           qli_pushbuf_flag; /* 1 bit used in push_ail */
-#ifdef DEBUG
-        uint64_t                 qli_push_owner;
-#endif
         xfs_dq_logformat_t       qli_format;       /* logged structure */
 } xfs_dq_logitem_t;
 
diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index 9e627a8b5b0e..417e61e3d9dd 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -118,9 +118,14 @@ xfs_Gqm_init(void)
          */
         udqhash = kmem_zalloc_greedy(&hsize,
                                      XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t),
-                                     XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t),
-                                     KM_SLEEP | KM_MAYFAIL | KM_LARGE);
-        gdqhash = kmem_zalloc(hsize, KM_SLEEP | KM_LARGE);
+                                     XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t));
+        if (!udqhash)
+                goto out;
+
+        gdqhash = kmem_zalloc_large(hsize);
+        if (!gdqhash)
+                goto out_free_udqhash;
+
         hsize /= sizeof(xfs_dqhash_t);
         ndquot = hsize << 8;
 
@@ -170,6 +175,11 @@ xfs_Gqm_init(void)
         mutex_init(&qcheck_lock);
 #endif
         return xqm;
+
+ out_free_udqhash:
+        kmem_free_large(udqhash);
+ out:
+        return NULL;
 }
 
 /*
@@ -189,8 +199,8 @@ xfs_qm_destroy(
                 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
                 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
         }
-        kmem_free(xqm->qm_usr_dqhtable);
-        kmem_free(xqm->qm_grp_dqhtable);
+        kmem_free_large(xqm->qm_usr_dqhtable);
+        kmem_free_large(xqm->qm_grp_dqhtable);
         xqm->qm_usr_dqhtable = NULL;
         xqm->qm_grp_dqhtable = NULL;
         xqm->qm_dqhashmask = 0;
@@ -219,8 +229,12 @@ xfs_qm_hold_quotafs_ref(
          */
         mutex_lock(&xfs_Gqm_lock);
 
-        if (xfs_Gqm == NULL)
+        if (!xfs_Gqm) {
                 xfs_Gqm = xfs_Gqm_init();
+                if (!xfs_Gqm)
+                        return ENOMEM;
+        }
+
         /*
          * We can keep a list of all filesystems with quotas mounted for
          * debugging and statistical purposes, but ...
@@ -436,7 +450,7 @@ xfs_qm_unmount_quotas(
 STATIC int
 xfs_qm_dqflush_all(
         xfs_mount_t     *mp,
-        int             flags)
+        int             sync_mode)
 {
         int             recl;
         xfs_dquot_t     *dqp;
@@ -472,7 +486,7 @@ again:
                  * across a disk write.
                  */
                 xfs_qm_mplist_unlock(mp);
-                error = xfs_qm_dqflush(dqp, flags);
+                error = xfs_qm_dqflush(dqp, sync_mode);
                 xfs_dqunlock(dqp);
                 if (error)
                         return error;
@@ -912,13 +926,11 @@ xfs_qm_sync(
 {
         int             recl, restarts;
         xfs_dquot_t     *dqp;
-        uint            flush_flags;
         int             error;
 
         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
                 return 0;
 
-        flush_flags = (flags & SYNC_WAIT) ? XFS_QMOPT_SYNC : XFS_QMOPT_DELWRI;
         restarts = 0;
 
   again:
@@ -978,7 +990,7 @@ xfs_qm_sync(
                  * across a disk write
                  */
                 xfs_qm_mplist_unlock(mp);
-                error = xfs_qm_dqflush(dqp, flush_flags);
+                error = xfs_qm_dqflush(dqp, flags);
                 xfs_dqunlock(dqp);
                 if (error && XFS_FORCED_SHUTDOWN(mp))
                         return 0;       /* Need to prevent umount failure */
@@ -1782,7 +1794,7 @@ xfs_qm_quotacheck(
          * successfully.
          */
         if (!error)
-                error = xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI);
+                error = xfs_qm_dqflush_all(mp, 0);
 
         /*
          * We can get this error if we couldn't do a dquot allocation inside
@@ -2004,7 +2016,7 @@ xfs_qm_shake_freelist(
                          * We flush it delayed write, so don't bother
                          * releasing the mplock.
                          */
-                        error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
+                        error = xfs_qm_dqflush(dqp, 0);
                         if (error) {
                                 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
                         "xfs_qm_dqflush_all: dquot %p flush failed", dqp);
@@ -2187,7 +2199,7 @@ xfs_qm_dqreclaim_one(void)
                          * We flush it delayed write, so don't bother
                          * releasing the freelist lock.
                          */
-                        error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
+                        error = xfs_qm_dqflush(dqp, 0);
                         if (error) {
                                 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
                         "xfs_qm_dqreclaim: dquot %p flush failed", dqp);
diff --git a/fs/xfs/quota/xfs_qm_bhv.c b/fs/xfs/quota/xfs_qm_bhv.c
index a5346630dfae..97b410c12794 100644
--- a/fs/xfs/quota/xfs_qm_bhv.c
+++ b/fs/xfs/quota/xfs_qm_bhv.c
@@ -59,7 +59,7 @@ xfs_fill_statvfs_from_dquot(
                 be64_to_cpu(dp->d_blk_hardlimit);
         if (limit && statp->f_blocks > limit) {
                 statp->f_blocks = limit;
-                statp->f_bfree =
+                statp->f_bfree = statp->f_bavail =
                         (statp->f_blocks > be64_to_cpu(dp->d_bcount)) ?
                          (statp->f_blocks - be64_to_cpu(dp->d_bcount)) : 0;
         }
diff --git a/fs/xfs/quota/xfs_qm_syscalls.c b/fs/xfs/quota/xfs_qm_syscalls.c
index 873e07e29074..5d0ee8d492db 100644
--- a/fs/xfs/quota/xfs_qm_syscalls.c
+++ b/fs/xfs/quota/xfs_qm_syscalls.c
@@ -1192,9 +1192,9 @@ xfs_qm_internalqcheck(
         if (! XFS_IS_QUOTA_ON(mp))
                 return XFS_ERROR(ESRCH);
 
-        xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
+        xfs_log_force(mp, XFS_LOG_SYNC);
         XFS_bflush(mp->m_ddev_targp);
-        xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
+        xfs_log_force(mp, XFS_LOG_SYNC);
         XFS_bflush(mp->m_ddev_targp);
 
         mutex_lock(&qcheck_lock);
diff --git a/fs/xfs/quota/xfs_trans_dquot.c b/fs/xfs/quota/xfs_trans_dquot.c
index 97ac9640be98..c3ab75cb1d9a 100644
--- a/fs/xfs/quota/xfs_trans_dquot.c
+++ b/fs/xfs/quota/xfs_trans_dquot.c
@@ -589,12 +589,18 @@ xfs_trans_unreserve_and_mod_dquots(
         }
 }
 
-STATIC int
-xfs_quota_error(uint flags)
+STATIC void
+xfs_quota_warn(
+        struct xfs_mount        *mp,
+        struct xfs_dquot        *dqp,
+        int                     type)
 {
-        if (flags & XFS_QMOPT_ENOSPC)
-                return ENOSPC;
-        return EDQUOT;
+        /* no warnings for project quotas - we just return ENOSPC later */
+        if (dqp->dq_flags & XFS_DQ_PROJ)
+                return;
+        quota_send_warning((dqp->dq_flags & XFS_DQ_USER) ? USRQUOTA : GRPQUOTA,
+                           be32_to_cpu(dqp->q_core.d_id), mp->m_super->s_dev,
+                           type);
 }
 
 /*
@@ -612,7 +618,6 @@ xfs_trans_dqresv(
         long            ninos,
         uint            flags)
 {
-        int             error;
         xfs_qcnt_t      hardlimit;
         xfs_qcnt_t      softlimit;
         time_t          timer;
@@ -649,7 +654,6 @@ xfs_trans_dqresv(
                 warnlimit = XFS_QI_RTBWARNLIMIT(dqp->q_mount);
                 resbcountp = &dqp->q_res_rtbcount;
         }
-        error = 0;
 
         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
             dqp->q_core.d_id &&
@@ -667,18 +671,20 @@ xfs_trans_dqresv(
                          * nblks.
                          */
                         if (hardlimit > 0ULL &&
-                             (hardlimit <= nblks + *resbcountp)) {
-                                error = xfs_quota_error(flags);
+                            hardlimit <= nblks + *resbcountp) {
+                                xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
                                 goto error_return;
                         }
-
                         if (softlimit > 0ULL &&
-                             (softlimit <= nblks + *resbcountp)) {
+                            softlimit <= nblks + *resbcountp) {
                                 if ((timer != 0 && get_seconds() > timer) ||
                                     (warns != 0 && warns >= warnlimit)) {
-                                        error = xfs_quota_error(flags);
+                                        xfs_quota_warn(mp, dqp,
+                                                       QUOTA_NL_BSOFTLONGWARN);
                                         goto error_return;
                                 }
+
+                                xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
                         }
                 }
                 if (ninos > 0) {
@@ -692,15 +698,19 @@ xfs_trans_dqresv(
                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
                         if (!softlimit)
                                 softlimit = q->qi_isoftlimit;
+
                         if (hardlimit > 0ULL && count >= hardlimit) {
-                                error = xfs_quota_error(flags);
+                                xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
                                 goto error_return;
-                        } else if (softlimit > 0ULL && count >= softlimit) {
-                                if ((timer != 0 && get_seconds() > timer) ||
+                        }
+                        if (softlimit > 0ULL && count >= softlimit) {
+                                if  ((timer != 0 && get_seconds() > timer) ||
                                      (warns != 0 && warns >= warnlimit)) {
-                                        error = xfs_quota_error(flags);
+                                        xfs_quota_warn(mp, dqp,
+                                                       QUOTA_NL_ISOFTLONGWARN);
                                         goto error_return;
                                 }
+                                xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
                         }
                 }
         }
@@ -736,9 +746,14 @@ xfs_trans_dqresv(
         ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
         ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
 
+        xfs_dqunlock(dqp);
+        return 0;
+
 error_return:
         xfs_dqunlock(dqp);
-        return error;
+        if (flags & XFS_QMOPT_ENOSPC)
+                return ENOSPC;
+        return EDQUOT;
 }
 
 
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h
index 00fd357c3e46..d13eeba2c8f8 100644
--- a/fs/xfs/xfs_acl.h
+++ b/fs/xfs/xfs_acl.h
@@ -36,8 +36,8 @@ struct xfs_acl {
 };
 
 /* On-disk XFS extended attribute names */
-#define SGI_ACL_FILE            "SGI_ACL_FILE"
-#define SGI_ACL_DEFAULT         "SGI_ACL_DEFAULT"
+#define SGI_ACL_FILE            (unsigned char *)"SGI_ACL_FILE"
+#define SGI_ACL_DEFAULT         (unsigned char *)"SGI_ACL_DEFAULT"
 #define SGI_ACL_FILE_SIZE       (sizeof(SGI_ACL_FILE)-1)
 #define SGI_ACL_DEFAULT_SIZE    (sizeof(SGI_ACL_DEFAULT)-1)
 
diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index 6702bd865811..b1a5a1ff88ea 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -187,17 +187,13 @@ typedef struct xfs_perag_busy {
 /*
  * Per-ag incore structure, copies of information in agf and agi,
  * to improve the performance of allocation group selection.
- *
- * pick sizes which fit in allocation buckets well
  */
-#if (BITS_PER_LONG == 32)
-#define XFS_PAGB_NUM_SLOTS      84
-#elif (BITS_PER_LONG == 64)
 #define XFS_PAGB_NUM_SLOTS      128
-#endif
 
-typedef struct xfs_perag
-{
+typedef struct xfs_perag {
+        struct xfs_mount *pag_mount;    /* owner filesystem */
+        xfs_agnumber_t  pag_agno;       /* AG this structure belongs to */
+        atomic_t        pag_ref;        /* perag reference count */
         char            pagf_init;      /* this agf's entry is initialized */
         char            pagi_init;      /* this agi's entry is initialized */
         char            pagf_metadata;  /* the agf is preferred to be metadata */
@@ -210,8 +206,6 @@ typedef struct xfs_perag
         __uint32_t      pagf_btreeblks; /* # of blocks held in AGF btrees */
         xfs_agino_t     pagi_freecount; /* number of free inodes */
         xfs_agino_t     pagi_count;     /* number of allocated inodes */
-        int             pagb_count;     /* pagb slots in use */
-        xfs_perag_busy_t *pagb_list;    /* unstable blocks */
 
         /*
          * Inode allocation search lookup optimisation.
@@ -230,6 +224,8 @@ typedef struct xfs_perag
         rwlock_t        pag_ici_lock;   /* incore inode lock */
         struct radix_tree_root pag_ici_root;    /* incore inode cache root */
 #endif
+        int             pagb_count;     /* pagb slots in use */
+        xfs_perag_busy_t pagb_list[XFS_PAGB_NUM_SLOTS]; /* unstable blocks */
 } xfs_perag_t;
 
 /*
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 275b1f4f9430..94cddbfb2560 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -1662,11 +1662,13 @@ xfs_free_ag_extent(
                 xfs_agf_t       *agf;
                 xfs_perag_t     *pag;           /* per allocation group data */
 
+                pag = xfs_perag_get(mp, agno);
+                pag->pagf_freeblks += len;
+                xfs_perag_put(pag);
+
                 agf = XFS_BUF_TO_AGF(agbp);
-                pag = &mp->m_perag[agno];
                 be32_add_cpu(&agf->agf_freeblks, len);
                 xfs_trans_agblocks_delta(tp, len);
-                pag->pagf_freeblks += len;
                 XFS_WANT_CORRUPTED_GOTO(
                         be32_to_cpu(agf->agf_freeblks) <=
                         be32_to_cpu(agf->agf_length),
@@ -1969,10 +1971,12 @@ xfs_alloc_get_freelist(
         xfs_trans_brelse(tp, agflbp);
         if (be32_to_cpu(agf->agf_flfirst) == XFS_AGFL_SIZE(mp))
                 agf->agf_flfirst = 0;
-        pag = &mp->m_perag[be32_to_cpu(agf->agf_seqno)];
+
+        pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));
         be32_add_cpu(&agf->agf_flcount, -1);
         xfs_trans_agflist_delta(tp, -1);
         pag->pagf_flcount--;
+        xfs_perag_put(pag);
 
         logflags = XFS_AGF_FLFIRST | XFS_AGF_FLCOUNT;
         if (btreeblk) {
@@ -2078,7 +2082,8 @@ xfs_alloc_put_freelist(
         be32_add_cpu(&agf->agf_fllast, 1);
         if (be32_to_cpu(agf->agf_fllast) == XFS_AGFL_SIZE(mp))
                 agf->agf_fllast = 0;
-        pag = &mp->m_perag[be32_to_cpu(agf->agf_seqno)];
+
+        pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));
         be32_add_cpu(&agf->agf_flcount, 1);
         xfs_trans_agflist_delta(tp, 1);
         pag->pagf_flcount++;
@@ -2089,6 +2094,7 @@ xfs_alloc_put_freelist(
                 pag->pagf_btreeblks--;
                 logflags |= XFS_AGF_BTREEBLKS;
         }
+        xfs_perag_put(pag);
 
         xfs_alloc_log_agf(tp, agbp, logflags);
 
@@ -2152,7 +2158,6 @@ xfs_read_agf(
                 xfs_trans_brelse(tp, *bpp);
                 return XFS_ERROR(EFSCORRUPTED);
         }
-
         XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_AGF, XFS_AGF_REF);
         return 0;
 }
@@ -2175,7 +2180,7 @@ xfs_alloc_read_agf(
         ASSERT(agno != NULLAGNUMBER);
 
         error = xfs_read_agf(mp, tp, agno,
-                        (flags & XFS_ALLOC_FLAG_TRYLOCK) ? XFS_BUF_TRYLOCK : 0,
+                        (flags & XFS_ALLOC_FLAG_TRYLOCK) ? XBF_TRYLOCK : 0,
                         bpp);
         if (error)
                 return error;
@@ -2184,7 +2189,7 @@ xfs_alloc_read_agf(
         ASSERT(!XFS_BUF_GETERROR(*bpp));
 
         agf = XFS_BUF_TO_AGF(*bpp);
-        pag = &mp->m_perag[agno];
+        pag = xfs_perag_get(mp, agno);
         if (!pag->pagf_init) {
                 pag->pagf_freeblks = be32_to_cpu(agf->agf_freeblks);
                 pag->pagf_btreeblks = be32_to_cpu(agf->agf_btreeblks);
@@ -2195,8 +2200,8 @@ xfs_alloc_read_agf(
                 pag->pagf_levels[XFS_BTNUM_CNTi] =
                         be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNTi]);
                 spin_lock_init(&pag->pagb_lock);
-                pag->pagb_list = kmem_zalloc(XFS_PAGB_NUM_SLOTS *
-                                        sizeof(xfs_perag_busy_t), KM_SLEEP);
+                pag->pagb_count = 0;
+                memset(pag->pagb_list, 0, sizeof(pag->pagb_list));
                 pag->pagf_init = 1;
         }
 #ifdef DEBUG
@@ -2211,6 +2216,7 @@ xfs_alloc_read_agf(
                        be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNTi]));
         }
 #endif
+        xfs_perag_put(pag);
         return 0;
 }
 
@@ -2270,8 +2276,7 @@ xfs_alloc_vextent(
                  * These three force us into a single a.g.
                  */
                 args->agno = XFS_FSB_TO_AGNO(mp, args->fsbno);
-                down_read(&mp->m_peraglock);
-                args->pag = &mp->m_perag[args->agno];
+                args->pag = xfs_perag_get(mp, args->agno);
                 args->minleft = 0;
                 error = xfs_alloc_fix_freelist(args, 0);
                 args->minleft = minleft;
@@ -2280,14 +2285,12 @@ xfs_alloc_vextent(
                         goto error0;
                 }
                 if (!args->agbp) {
-                        up_read(&mp->m_peraglock);
                         trace_xfs_alloc_vextent_noagbp(args);
                         break;
                 }
                 args->agbno = XFS_FSB_TO_AGBNO(mp, args->fsbno);
                 if ((error = xfs_alloc_ag_vextent(args)))
                         goto error0;
-                up_read(&mp->m_peraglock);
                 break;
         case XFS_ALLOCTYPE_START_BNO:
                 /*
@@ -2339,9 +2342,8 @@ xfs_alloc_vextent(
                  * Loop over allocation groups twice; first time with
                  * trylock set, second time without.
                  */
-                down_read(&mp->m_peraglock);
                 for (;;) {
-                        args->pag = &mp->m_perag[args->agno];
+                        args->pag = xfs_perag_get(mp, args->agno);
                         if (no_min) args->minleft = 0;
                         error = xfs_alloc_fix_freelist(args, flags);
                         args->minleft = minleft;
@@ -2400,8 +2402,8 @@ xfs_alloc_vextent(
                                         }
                                 }
                         }
+                        xfs_perag_put(args->pag);
                 }
-                up_read(&mp->m_peraglock);
                 if (bump_rotor || (type == XFS_ALLOCTYPE_ANY_AG)) {
                         if (args->agno == sagno)
                                 mp->m_agfrotor = (mp->m_agfrotor + 1) %
@@ -2427,9 +2429,10 @@ xfs_alloc_vextent(
                         args->len);
 #endif
         }
+        xfs_perag_put(args->pag);
         return 0;
 error0:
-        up_read(&mp->m_peraglock);
+        xfs_perag_put(args->pag);
         return error;
 }
 
@@ -2454,8 +2457,7 @@ xfs_free_extent(
         args.agno = XFS_FSB_TO_AGNO(args.mp, bno);
         ASSERT(args.agno < args.mp->m_sb.sb_agcount);
         args.agbno = XFS_FSB_TO_AGBNO(args.mp, bno);
-        down_read(&args.mp->m_peraglock);
-        args.pag = &args.mp->m_perag[args.agno];
+        args.pag = xfs_perag_get(args.mp, args.agno);
         if ((error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING)))
                 goto error0;
 #ifdef DEBUG
@@ -2465,7 +2467,7 @@ xfs_free_extent(
 #endif
         error = xfs_free_ag_extent(tp, args.agbp, args.agno, args.agbno, len, 0);
 error0:
-        up_read(&args.mp->m_peraglock);
+        xfs_perag_put(args.pag);
         return error;
 }
 
@@ -2486,15 +2488,15 @@ xfs_alloc_mark_busy(xfs_trans_t *tp,
                     xfs_agblock_t bno,
                     xfs_extlen_t len)
 {
-        xfs_mount_t             *mp;
         xfs_perag_busy_t        *bsy;
+        struct xfs_perag        *pag;
         int                     n;
 
-        mp = tp->t_mountp;
-        spin_lock(&mp->m_perag[agno].pagb_lock);
+        pag = xfs_perag_get(tp->t_mountp, agno);
+        spin_lock(&pag->pagb_lock);
 
         /* search pagb_list for an open slot */
-        for (bsy = mp->m_perag[agno].pagb_list, n = 0;
+        for (bsy = pag->pagb_list, n = 0;
              n < XFS_PAGB_NUM_SLOTS;
              bsy++, n++) {
                 if (bsy->busy_tp == NULL) {
@@ -2502,11 +2504,11 @@ xfs_alloc_mark_busy(xfs_trans_t *tp,
                 }
         }
 
-        trace_xfs_alloc_busy(mp, agno, bno, len, n);
+        trace_xfs_alloc_busy(tp->t_mountp, agno, bno, len, n);
 
         if (n < XFS_PAGB_NUM_SLOTS) {
-                bsy = &mp->m_perag[agno].pagb_list[n];
-                mp->m_perag[agno].pagb_count++;
+                bsy = &pag->pagb_list[n];
+                pag->pagb_count++;
                 bsy->busy_start = bno;
                 bsy->busy_length = len;
                 bsy->busy_tp = tp;
@@ -2521,7 +2523,8 @@ xfs_alloc_mark_busy(xfs_trans_t *tp,
                 xfs_trans_set_sync(tp);
         }
 
-        spin_unlock(&mp->m_perag[agno].pagb_lock);
+        spin_unlock(&pag->pagb_lock);
+        xfs_perag_put(pag);
 }
 
 void
@@ -2529,24 +2532,23 @@ xfs_alloc_clear_busy(xfs_trans_t *tp,
                      xfs_agnumber_t agno,
                      int idx)
 {
-        xfs_mount_t             *mp;
+        struct xfs_perag        *pag;
         xfs_perag_busy_t        *list;
 
-        mp = tp->t_mountp;
-
-        spin_lock(&mp->m_perag[agno].pagb_lock);
-        list = mp->m_perag[agno].pagb_list;
-
         ASSERT(idx < XFS_PAGB_NUM_SLOTS);
+        pag = xfs_perag_get(tp->t_mountp, agno);
+        spin_lock(&pag->pagb_lock);
+        list = pag->pagb_list;
 
-        trace_xfs_alloc_unbusy(mp, agno, idx, list[idx].busy_tp == tp);
+        trace_xfs_alloc_unbusy(tp->t_mountp, agno, idx, list[idx].busy_tp == tp);
 
         if (list[idx].busy_tp == tp) {
                 list[idx].busy_tp = NULL;
-                mp->m_perag[agno].pagb_count--;
+                pag->pagb_count--;
         }
 
-        spin_unlock(&mp->m_perag[agno].pagb_lock);
+        spin_unlock(&pag->pagb_lock);
+        xfs_perag_put(pag);
 }
 
 
@@ -2560,17 +2562,15 @@ xfs_alloc_search_busy(xfs_trans_t *tp,
                     xfs_agblock_t bno,
                     xfs_extlen_t len)
 {
-        xfs_mount_t             *mp;
+        struct xfs_perag        *pag;
         xfs_perag_busy_t        *bsy;
         xfs_agblock_t           uend, bend;
         xfs_lsn_t               lsn = 0;
         int                     cnt;
 
-        mp = tp->t_mountp;
-
-        spin_lock(&mp->m_perag[agno].pagb_lock);
-
-        uend = bno + len - 1;
+        pag = xfs_perag_get(tp->t_mountp, agno);
+        spin_lock(&pag->pagb_lock);
+        cnt = pag->pagb_count;
 
         /*
          * search pagb_list for this slot, skipping open slots. We have to
@@ -2578,8 +2578,9 @@ xfs_alloc_search_busy(xfs_trans_t *tp,
          * we have to get the most recent LSN for the log force to push out
          * all the transactions that span the range.
          */
-        for (cnt = 0; cnt < mp->m_perag[agno].pagb_count; cnt++) {
-                bsy = &mp->m_perag[agno].pagb_list[cnt];
+        uend = bno + len - 1;
+        for (cnt = 0; cnt < pag->pagb_count; cnt++) {
+                bsy = &pag->pagb_list[cnt];
                 if (!bsy->busy_tp)
                         continue;
 
@@ -2591,7 +2592,8 @@ xfs_alloc_search_busy(xfs_trans_t *tp,
                 if (XFS_LSN_CMP(bsy->busy_tp->t_commit_lsn, lsn) > 0)
                         lsn = bsy->busy_tp->t_commit_lsn;
         }
-        spin_unlock(&mp->m_perag[agno].pagb_lock);
+        spin_unlock(&pag->pagb_lock);
+        xfs_perag_put(pag);
         trace_xfs_alloc_busysearch(tp->t_mountp, agno, bno, len, lsn);
 
         /*
@@ -2599,5 +2601,5 @@ xfs_alloc_search_busy(xfs_trans_t *tp,
          * transaction that freed the block
          */
         if (lsn)
-                xfs_log_force(mp, lsn, XFS_LOG_FORCE|XFS_LOG_SYNC);
+                xfs_log_force_lsn(tp->t_mountp, lsn, XFS_LOG_SYNC);
 }
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c
index adbd9141aea1..b726e10d2c1c 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/xfs_alloc_btree.c
@@ -61,12 +61,14 @@ xfs_allocbt_set_root(
         struct xfs_agf          *agf = XFS_BUF_TO_AGF(agbp);
         xfs_agnumber_t          seqno = be32_to_cpu(agf->agf_seqno);
         int                     btnum = cur->bc_btnum;
+        struct xfs_perag        *pag = xfs_perag_get(cur->bc_mp, seqno);
 
         ASSERT(ptr->s != 0);
 
         agf->agf_roots[btnum] = ptr->s;
         be32_add_cpu(&agf->agf_levels[btnum], inc);
-        cur->bc_mp->m_perag[seqno].pagf_levels[btnum] += inc;
+        pag->pagf_levels[btnum] += inc;
+        xfs_perag_put(pag);
 
         xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_ROOTS | XFS_AGF_LEVELS);
 }
@@ -150,6 +152,7 @@ xfs_allocbt_update_lastrec(
 {
         struct xfs_agf          *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp);
         xfs_agnumber_t          seqno = be32_to_cpu(agf->agf_seqno);
+        struct xfs_perag        *pag;
         __be32                  len;
         int                     numrecs;
 
@@ -193,7 +196,9 @@ xfs_allocbt_update_lastrec(
         }
 
         agf->agf_longest = len;
-        cur->bc_mp->m_perag[seqno].pagf_longest = be32_to_cpu(len);
+        pag = xfs_perag_get(cur->bc_mp, seqno);
+        pag->pagf_longest = be32_to_cpu(len);
+        xfs_perag_put(pag);
         xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, XFS_AGF_LONGEST);
 }
 
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index e953b6cfb2a8..b9c196a53c42 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -93,12 +93,12 @@ STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args);
 STATIC int
 xfs_attr_name_to_xname(
         struct xfs_name *xname,
-        const char      *aname)
+        const unsigned char *aname)
 {
         if (!aname)
                 return EINVAL;
         xname->name = aname;
-        xname->len = strlen(aname);
+        xname->len = strlen((char *)aname);
         if (xname->len >= MAXNAMELEN)
                 return EFAULT;          /* match IRIX behaviour */
 
@@ -124,7 +124,7 @@ STATIC int
 xfs_attr_get_int(
         struct xfs_inode        *ip,
         struct xfs_name         *name,
-        char                    *value,
+        unsigned char           *value,
         int                     *valuelenp,
         int                     flags)
 {
@@ -171,8 +171,8 @@ xfs_attr_get_int(
 int
 xfs_attr_get(
         xfs_inode_t     *ip,
-        const char      *name,
-        char            *value,
+        const unsigned char *name,
+        unsigned char   *value,
         int             *valuelenp,
         int             flags)
 {
@@ -197,7 +197,7 @@ xfs_attr_get(
 /*
  * Calculate how many blocks we need for the new attribute,
  */
-int
+STATIC int
 xfs_attr_calc_size(
         struct xfs_inode        *ip,
         int                     namelen,
@@ -235,8 +235,12 @@ xfs_attr_calc_size(
 }
 
 STATIC int
-xfs_attr_set_int(xfs_inode_t *dp, struct xfs_name *name,
-                char *value, int valuelen, int flags)
+xfs_attr_set_int(
+        struct xfs_inode *dp,
+        struct xfs_name *name,
+        unsigned char   *value,
+        int             valuelen,
+        int             flags)
 {
         xfs_da_args_t   args;
         xfs_fsblock_t   firstblock;
@@ -452,8 +456,8 @@ out:
 int
 xfs_attr_set(
         xfs_inode_t     *dp,
-        const char      *name,
-        char            *value,
+        const unsigned char *name,
+        unsigned char   *value,
         int             valuelen,
         int             flags)
 {
@@ -600,7 +604,7 @@ out:
 int
 xfs_attr_remove(
         xfs_inode_t     *dp,
-        const char      *name,
+        const unsigned char *name,
         int             flags)
 {
         int             error;
@@ -669,9 +673,13 @@ xfs_attr_list_int(xfs_attr_list_context_t *context)
  */
 /*ARGSUSED*/
 STATIC int
-xfs_attr_put_listent(xfs_attr_list_context_t *context, int flags,
-                     char *name, int namelen,
-                     int valuelen, char *value)
+xfs_attr_put_listent(
+        xfs_attr_list_context_t *context,
+        int             flags,
+        unsigned char   *name,
+        int             namelen,
+        int             valuelen,
+        unsigned char   *value)
 {
         struct attrlist *alist = (struct attrlist *)context->alist;
         attrlist_ent_t *aep;
@@ -1980,7 +1988,7 @@ xfs_attr_rmtval_get(xfs_da_args_t *args)
         xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE];
         xfs_mount_t *mp;
         xfs_daddr_t dblkno;
-        xfs_caddr_t dst;
+        void *dst;
         xfs_buf_t *bp;
         int nmap, error, tmp, valuelen, blkcnt, i;
         xfs_dablk_t lblkno;
@@ -2007,15 +2015,14 @@ xfs_attr_rmtval_get(xfs_da_args_t *args)
                         dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock);
                         blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
                         error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno,
-                                             blkcnt,
-                                             XFS_BUF_LOCK | XBF_DONT_BLOCK,
+                                             blkcnt, XBF_LOCK | XBF_DONT_BLOCK,
                                              &bp);
                         if (error)
                                 return(error);
 
                         tmp = (valuelen < XFS_BUF_SIZE(bp))
                                 ? valuelen : XFS_BUF_SIZE(bp);
-                        xfs_biomove(bp, 0, tmp, dst, XFS_B_READ);
+                        xfs_biomove(bp, 0, tmp, dst, XBF_READ);
                         xfs_buf_relse(bp);
                         dst += tmp;
                         valuelen -= tmp;
@@ -2039,7 +2046,7 @@ xfs_attr_rmtval_set(xfs_da_args_t *args)
         xfs_inode_t *dp;
         xfs_bmbt_irec_t map;
         xfs_daddr_t dblkno;
-        xfs_caddr_t src;
+        void *src;
         xfs_buf_t *bp;
         xfs_dablk_t lblkno;
         int blkcnt, valuelen, nmap, error, tmp, committed;
@@ -2141,13 +2148,13 @@ xfs_attr_rmtval_set(xfs_da_args_t *args)
                 blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
 
                 bp = xfs_buf_get(mp->m_ddev_targp, dblkno, blkcnt,
-                                 XFS_BUF_LOCK | XBF_DONT_BLOCK);
+                                 XBF_LOCK | XBF_DONT_BLOCK);
                 ASSERT(bp);
                 ASSERT(!XFS_BUF_GETERROR(bp));
 
                 tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen :
                                                         XFS_BUF_SIZE(bp);
-                xfs_biomove(bp, 0, tmp, src, XFS_B_WRITE);
+                xfs_biomove(bp, 0, tmp, src, XBF_WRITE);
                 if (tmp < XFS_BUF_SIZE(bp))
                         xfs_biozero(bp, tmp, XFS_BUF_SIZE(bp) - tmp);
                 if ((error = xfs_bwrite(mp, bp))) {/* GROT: NOTE: synchronous write */
@@ -2208,8 +2215,7 @@ xfs_attr_rmtval_remove(xfs_da_args_t *args)
                 /*
                  * If the "remote" value is in the cache, remove it.
                  */
-                bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt,
-                                XFS_INCORE_TRYLOCK);
+                bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, XBF_TRYLOCK);
                 if (bp) {
                         XFS_BUF_STALE(bp);
                         XFS_BUF_UNDELAYWRITE(bp);
diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h
index 59b410ce69a1..e920d68ef509 100644
--- a/fs/xfs/xfs_attr.h
+++ b/fs/xfs/xfs_attr.h
@@ -113,7 +113,7 @@ typedef struct attrlist_cursor_kern {
 
 
 typedef int (*put_listent_func_t)(struct xfs_attr_list_context *, int,
-                                      char *, int, int, char *);
+                              unsigned char *, int, int, unsigned char *);
 
 typedef struct xfs_attr_list_context {
         struct xfs_inode                *dp;            /* inode */
@@ -139,7 +139,6 @@ typedef struct xfs_attr_list_context {
 /*
  * Overall external interface routines.
  */
-int xfs_attr_calc_size(struct xfs_inode *, int, int, int *);
 int xfs_attr_inactive(struct xfs_inode *dp);
 int xfs_attr_rmtval_get(struct xfs_da_args *args);
 int xfs_attr_list_int(struct xfs_attr_list_context *);
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index baf41b5af756..a90ce74fc256 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -521,11 +521,11 @@ xfs_attr_shortform_to_leaf(xfs_da_args_t *args)
 
         sfe = &sf->list[0];
         for (i = 0; i < sf->hdr.count; i++) {
-                nargs.name = (char *)sfe->nameval;
+                nargs.name = sfe->nameval;
                 nargs.namelen = sfe->namelen;
-                nargs.value = (char *)&sfe->nameval[nargs.namelen];
+                nargs.value = &sfe->nameval[nargs.namelen];
                 nargs.valuelen = sfe->valuelen;
-                nargs.hashval = xfs_da_hashname((char *)sfe->nameval,
+                nargs.hashval = xfs_da_hashname(sfe->nameval,
                                                 sfe->namelen);
                 nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(sfe->flags);
                 error = xfs_attr_leaf_lookup_int(bp, &nargs); /* set a->index */
@@ -612,10 +612,10 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
                 for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) {
                         error = context->put_listent(context,
                                            sfe->flags,
-                                           (char *)sfe->nameval,
+                                           sfe->nameval,
                                            (int)sfe->namelen,
                                            (int)sfe->valuelen,
-                                           (char*)&sfe->nameval[sfe->namelen]);
+                                           &sfe->nameval[sfe->namelen]);
 
                         /*
                          * Either search callback finished early or
@@ -659,8 +659,8 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context)
                 }
 
                 sbp->entno = i;
-                sbp->hash = xfs_da_hashname((char *)sfe->nameval, sfe->namelen);
-                sbp->name = (char *)sfe->nameval;
+                sbp->hash = xfs_da_hashname(sfe->nameval, sfe->namelen);
+                sbp->name = sfe->nameval;
                 sbp->namelen = sfe->namelen;
                 /* These are bytes, and both on-disk, don't endian-flip */
                 sbp->valuelen = sfe->valuelen;
@@ -818,9 +818,9 @@ xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args, int forkoff)
                         continue;
                 ASSERT(entry->flags & XFS_ATTR_LOCAL);
                 name_loc = xfs_attr_leaf_name_local(leaf, i);
-                nargs.name = (char *)name_loc->nameval;
+                nargs.name = name_loc->nameval;
                 nargs.namelen = name_loc->namelen;
-                nargs.value = (char *)&name_loc->nameval[nargs.namelen];
+                nargs.value = &name_loc->nameval[nargs.namelen];
                 nargs.valuelen = be16_to_cpu(name_loc->valuelen);
                 nargs.hashval = be32_to_cpu(entry->hashval);
                 nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(entry->flags);
@@ -2370,10 +2370,10 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
 
                         retval = context->put_listent(context,
                                                 entry->flags,
-                                                (char *)name_loc->nameval,
+                                                name_loc->nameval,
                                                 (int)name_loc->namelen,
                                                 be16_to_cpu(name_loc->valuelen),
-                                                (char *)&name_loc->nameval[name_loc->namelen]);
+                                                &name_loc->nameval[name_loc->namelen]);
                         if (retval)
                                 return retval;
                 } else {
@@ -2397,15 +2397,15 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context)
                                         return retval;
                                 retval = context->put_listent(context,
                                                 entry->flags,
-                                                (char *)name_rmt->name,
+                                                name_rmt->name,
                                                 (int)name_rmt->namelen,
                                                 valuelen,
-                                                (char*)args.value);
+                                                args.value);
                                 kmem_free(args.value);
                         } else {
                                 retval = context->put_listent(context,
                                                 entry->flags,
-                                                (char *)name_rmt->name,
+                                                name_rmt->name,
                                                 (int)name_rmt->namelen,
                                                 valuelen,
                                                 NULL);
@@ -2950,7 +2950,7 @@ xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
                                                 map.br_blockcount);
                         bp = xfs_trans_get_buf(*trans,
                                         dp->i_mount->m_ddev_targp,
-                                        dblkno, dblkcnt, XFS_BUF_LOCK);
+                                        dblkno, dblkcnt, XBF_LOCK);
                         xfs_trans_binval(*trans, bp);
                         /*
                          * Roll to next transaction.
diff --git a/fs/xfs/xfs_attr_sf.h b/fs/xfs/xfs_attr_sf.h
index 76ab7b0cbb3a..919756e3ba53 100644
--- a/fs/xfs/xfs_attr_sf.h
+++ b/fs/xfs/xfs_attr_sf.h
@@ -52,7 +52,7 @@ typedef struct xfs_attr_sf_sort {
         __uint8_t       valuelen;       /* length of value */
         __uint8_t       flags;          /* flags bits (see xfs_attr_leaf.h) */
         xfs_dahash_t    hash;           /* this entry's hash value */
-        char            *name;          /* name value, pointer into buffer */
+        unsigned char   *name;          /* name value, pointer into buffer */
 } xfs_attr_sf_sort_t;
 
 #define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen)   /* space name/value uses */ \
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 98251cdc52aa..1869fb973819 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -2629,13 +2629,12 @@ xfs_bmap_btalloc(
                 if (startag == NULLAGNUMBER)
                         startag = ag = 0;
                 notinit = 0;
-                down_read(&mp->m_peraglock);
+                pag = xfs_perag_get(mp, ag);
                 while (blen < ap->alen) {
-                        pag = &mp->m_perag[ag];
                         if (!pag->pagf_init &&
                             (error = xfs_alloc_pagf_init(mp, args.tp,
                                     ag, XFS_ALLOC_FLAG_TRYLOCK))) {
-                                up_read(&mp->m_peraglock);
+                                xfs_perag_put(pag);
                                 return error;
                         }
                         /*
@@ -2667,13 +2666,13 @@ xfs_bmap_btalloc(
                                                 break;
 
                                         error = xfs_filestream_new_ag(ap, &ag);
-                                        if (error) {
-                                                up_read(&mp->m_peraglock);
+                                        xfs_perag_put(pag);
+                                        if (error)
                                                 return error;
-                                        }
 
                                         /* loop again to set 'blen'*/
                                         startag = NULLAGNUMBER;
+                                        pag = xfs_perag_get(mp, ag);
                                         continue;
                                 }
                         }
@@ -2681,8 +2680,10 @@ xfs_bmap_btalloc(
                                 ag = 0;
                         if (ag == startag)
                                 break;
+                        xfs_perag_put(pag);
+                        pag = xfs_perag_get(mp, ag);
                 }
-                up_read(&mp->m_peraglock);
+                xfs_perag_put(pag);
                 /*
                  * Since the above loop did a BUF_TRYLOCK, it is
                  * possible that there is space for this request.
@@ -4470,7 +4471,7 @@ xfs_bmapi(
         xfs_fsblock_t   abno;           /* allocated block number */
         xfs_extlen_t    alen;           /* allocated extent length */
         xfs_fileoff_t   aoff;           /* allocated file offset */
-        xfs_bmalloca_t  bma;            /* args for xfs_bmap_alloc */
+        xfs_bmalloca_t  bma = { 0 };    /* args for xfs_bmap_alloc */
         xfs_btree_cur_t *cur;           /* bmap btree cursor */
         xfs_fileoff_t   end;            /* end of mapped file region */
         int             eof;            /* we've hit the end of extents */
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 38751d5fac6f..416e47e54b83 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -334,7 +334,7 @@ xfs_bmbt_disk_set_allf(
 /*
  * Set all the fields in a bmap extent record from the uncompressed form.
  */
-void
+STATIC void
 xfs_bmbt_disk_set_all(
         xfs_bmbt_rec_t  *r,
         xfs_bmbt_irec_t *s)
diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h
index cf07ca7c22e7..0e66c4ea0f85 100644
--- a/fs/xfs/xfs_bmap_btree.h
+++ b/fs/xfs/xfs_bmap_btree.h
@@ -223,7 +223,6 @@ extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v);
 extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v);
 extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v);
 
-extern void xfs_bmbt_disk_set_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s);
 extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o,
                         xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
 
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 36a0992dd669..96be4b0f2496 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -977,7 +977,7 @@ xfs_btree_get_buf_block(
         xfs_daddr_t             d;
 
         /* need to sort out how callers deal with failures first */
-        ASSERT(!(flags & XFS_BUF_TRYLOCK));
+        ASSERT(!(flags & XBF_TRYLOCK));
 
         d = xfs_btree_ptr_to_daddr(cur, ptr);
         *bpp = xfs_trans_get_buf(cur->bc_tp, mp->m_ddev_targp, d,
@@ -1008,7 +1008,7 @@ xfs_btree_read_buf_block(
         int                     error;
 
         /* need to sort out how callers deal with failures first */
-        ASSERT(!(flags & XFS_BUF_TRYLOCK));
+        ASSERT(!(flags & XBF_TRYLOCK));
 
         d = xfs_btree_ptr_to_daddr(cur, ptr);
         error = xfs_trans_read_buf(mp, cur->bc_tp, mp->m_ddev_targp, d,
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index a30f7e9eb2b9..f3c49e69eab9 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -250,7 +250,7 @@ xfs_buf_item_format(
                        ((bip->bli_format.blf_map_size - 1) * sizeof(uint)));
         vecp->i_addr = (xfs_caddr_t)&bip->bli_format;
         vecp->i_len = base_size;
-        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_BFORMAT);
+        vecp->i_type = XLOG_REG_TYPE_BFORMAT;
         vecp++;
         nvecs = 1;
 
@@ -297,14 +297,14 @@ xfs_buf_item_format(
                         buffer_offset = first_bit * XFS_BLI_CHUNK;
                         vecp->i_addr = xfs_buf_offset(bp, buffer_offset);
                         vecp->i_len = nbits * XFS_BLI_CHUNK;
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_BCHUNK);
+                        vecp->i_type = XLOG_REG_TYPE_BCHUNK;
                         nvecs++;
                         break;
                 } else if (next_bit != last_bit + 1) {
                         buffer_offset = first_bit * XFS_BLI_CHUNK;
                         vecp->i_addr = xfs_buf_offset(bp, buffer_offset);
                         vecp->i_len = nbits * XFS_BLI_CHUNK;
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_BCHUNK);
+                        vecp->i_type = XLOG_REG_TYPE_BCHUNK;
                         nvecs++;
                         vecp++;
                         first_bit = next_bit;
@@ -316,7 +316,7 @@ xfs_buf_item_format(
                         buffer_offset = first_bit * XFS_BLI_CHUNK;
                         vecp->i_addr = xfs_buf_offset(bp, buffer_offset);
                         vecp->i_len = nbits * XFS_BLI_CHUNK;
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_BCHUNK);
+                        vecp->i_type = XLOG_REG_TYPE_BCHUNK;
 /* You would think we need to bump the nvecs here too, but we do not
  * this number is used by recovery, and it gets confused by the boundary
  * split here
@@ -467,8 +467,10 @@ xfs_buf_item_unpin_remove(
 /*
  * This is called to attempt to lock the buffer associated with this
  * buf log item.  Don't sleep on the buffer lock.  If we can't get
- * the lock right away, return 0.  If we can get the lock, pull the
- * buffer from the free list, mark it busy, and return 1.
+ * the lock right away, return 0.  If we can get the lock, take a
+ * reference to the buffer. If this is a delayed write buffer that
+ * needs AIL help to be written back, invoke the pushbuf routine
+ * rather than the normal success path.
  */
 STATIC uint
 xfs_buf_item_trylock(
@@ -477,24 +479,18 @@ xfs_buf_item_trylock(
         xfs_buf_t       *bp;
 
         bp = bip->bli_buf;
-
-        if (XFS_BUF_ISPINNED(bp)) {
+        if (XFS_BUF_ISPINNED(bp))
                 return XFS_ITEM_PINNED;
-        }
-
-        if (!XFS_BUF_CPSEMA(bp)) {
+        if (!XFS_BUF_CPSEMA(bp))
                 return XFS_ITEM_LOCKED;
-        }
 
-        /*
-         * Remove the buffer from the free list.  Only do this
-         * if it's on the free list.  Private buffers like the
-         * superblock buffer are not.
-         */
+        /* take a reference to the buffer.  */
         XFS_BUF_HOLD(bp);
 
         ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
         trace_xfs_buf_item_trylock(bip);
+        if (XFS_BUF_ISDELAYWRITE(bp))
+                return XFS_ITEM_PUSHBUF;
         return XFS_ITEM_SUCCESS;
 }
 
@@ -626,11 +622,9 @@ xfs_buf_item_committed(
 }
 
 /*
- * This is called to asynchronously write the buffer associated with this
- * buf log item out to disk. The buffer will already have been locked by
- * a successful call to xfs_buf_item_trylock().  If the buffer still has
- * B_DELWRI set, then get it going out to disk with a call to bawrite().
- * If not, then just release the buffer.
+ * The buffer is locked, but is not a delayed write buffer. This happens
+ * if we race with IO completion and hence we don't want to try to write it
+ * again. Just release the buffer.
  */
 STATIC void
 xfs_buf_item_push(
@@ -642,17 +636,29 @@ xfs_buf_item_push(
         trace_xfs_buf_item_push(bip);
 
         bp = bip->bli_buf;
+        ASSERT(!XFS_BUF_ISDELAYWRITE(bp));
+        xfs_buf_relse(bp);
+}
 
-        if (XFS_BUF_ISDELAYWRITE(bp)) {
-                int     error;
-                error = xfs_bawrite(bip->bli_item.li_mountp, bp);
-                if (error)
-                        xfs_fs_cmn_err(CE_WARN, bip->bli_item.li_mountp,
-                        "xfs_buf_item_push: pushbuf error %d on bip %p, bp %p",
-                                        error, bip, bp);
-        } else {
-                xfs_buf_relse(bp);
-        }
+/*
+ * The buffer is locked and is a delayed write buffer. Promote the buffer
+ * in the delayed write queue as the caller knows that they must invoke
+ * the xfsbufd to get this buffer written. We have to unlock the buffer
+ * to allow the xfsbufd to write it, too.
+ */
+STATIC void
+xfs_buf_item_pushbuf(
+        xfs_buf_log_item_t      *bip)
+{
+        xfs_buf_t       *bp;
+
+        ASSERT(!(bip->bli_flags & XFS_BLI_STALE));
+        trace_xfs_buf_item_pushbuf(bip);
+
+        bp = bip->bli_buf;
+        ASSERT(XFS_BUF_ISDELAYWRITE(bp));
+        xfs_buf_delwri_promote(bp);
+        xfs_buf_relse(bp);
 }
 
 /* ARGSUSED */
@@ -677,7 +683,7 @@ static struct xfs_item_ops xfs_buf_item_ops = {
         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
                                         xfs_buf_item_committed,
         .iop_push       = (void(*)(xfs_log_item_t*))xfs_buf_item_push,
-        .iop_pushbuf    = NULL,
+        .iop_pushbuf    = (void(*)(xfs_log_item_t*))xfs_buf_item_pushbuf,
         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
                                         xfs_buf_item_committing
 };
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index c0c8869115b1..0ca556b4bf31 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -1534,8 +1534,8 @@ xfs_da_hashname(const __uint8_t *name, int namelen)
 enum xfs_dacmp
 xfs_da_compname(
         struct xfs_da_args *args,
-        const char      *name,
-        int             len)
+        const unsigned char *name,
+        int             len)
 {
         return (args->namelen == len && memcmp(args->name, name, len) == 0) ?
                                         XFS_CMP_EXACT : XFS_CMP_DIFFERENT;
diff --git a/fs/xfs/xfs_da_btree.h b/fs/xfs/xfs_da_btree.h
index 30cd08f56a3a..fe9f5a8c1d2a 100644
--- a/fs/xfs/xfs_da_btree.h
+++ b/fs/xfs/xfs_da_btree.h
@@ -209,7 +209,8 @@ typedef struct xfs_da_state {
  */
 struct xfs_nameops {
         xfs_dahash_t    (*hashname)(struct xfs_name *);
-        enum xfs_dacmp  (*compname)(struct xfs_da_args *, const char *, int);
+        enum xfs_dacmp  (*compname)(struct xfs_da_args *,
+                                        const unsigned char *, int);
 };
 
 
@@ -260,7 +261,7 @@ int	xfs_da_shrink_inode(xfs_da_args_t *args, xfs_dablk_t dead_blkno,
 
 uint xfs_da_hashname(const __uint8_t *name_string, int name_length);
 enum xfs_dacmp xfs_da_compname(struct xfs_da_args *args,
-                                const char *name, int len);
+                                const unsigned char *name, int len);
 
 
 xfs_da_state_t *xfs_da_state_alloc(void);
diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c
index 84ca1cf16a1e..cd27c9d6c71f 100644
--- a/fs/xfs/xfs_dfrag.c
+++ b/fs/xfs/xfs_dfrag.c
@@ -45,15 +45,21 @@
 #include "xfs_vnodeops.h"
 #include "xfs_trace.h"
 
+
+static int xfs_swap_extents(
+        xfs_inode_t     *ip,    /* target inode */
+        xfs_inode_t     *tip,   /* tmp inode */
+        xfs_swapext_t   *sxp);
+
 /*
- * Syssgi interface for swapext
+ * ioctl interface for swapext
  */
 int
 xfs_swapext(
         xfs_swapext_t   *sxp)
 {
         xfs_inode_t     *ip, *tip;
-        struct file     *file, *target_file;
+        struct file     *file, *tmp_file;
         int             error = 0;
 
         /* Pull information for the target fd */
@@ -68,46 +74,46 @@ xfs_swapext(
                 goto out_put_file;
         }
 
-        target_file = fget((int)sxp->sx_fdtmp);
-        if (!target_file) {
+        tmp_file = fget((int)sxp->sx_fdtmp);
+        if (!tmp_file) {
                 error = XFS_ERROR(EINVAL);
                 goto out_put_file;
         }
 
-        if (!(target_file->f_mode & FMODE_WRITE) ||
-            (target_file->f_flags & O_APPEND)) {
+        if (!(tmp_file->f_mode & FMODE_WRITE) ||
+            (tmp_file->f_flags & O_APPEND)) {
                 error = XFS_ERROR(EBADF);
-                goto out_put_target_file;
+                goto out_put_tmp_file;
         }
 
         if (IS_SWAPFILE(file->f_path.dentry->d_inode) ||
-            IS_SWAPFILE(target_file->f_path.dentry->d_inode)) {
+            IS_SWAPFILE(tmp_file->f_path.dentry->d_inode)) {
                 error = XFS_ERROR(EINVAL);
-                goto out_put_target_file;
+                goto out_put_tmp_file;
         }
 
         ip = XFS_I(file->f_path.dentry->d_inode);
-        tip = XFS_I(target_file->f_path.dentry->d_inode);
+        tip = XFS_I(tmp_file->f_path.dentry->d_inode);
 
         if (ip->i_mount != tip->i_mount) {
                 error = XFS_ERROR(EINVAL);
-                goto out_put_target_file;
+                goto out_put_tmp_file;
         }
 
         if (ip->i_ino == tip->i_ino) {
                 error = XFS_ERROR(EINVAL);
-                goto out_put_target_file;
+                goto out_put_tmp_file;
         }
 
         if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
                 error = XFS_ERROR(EIO);
-                goto out_put_target_file;
+                goto out_put_tmp_file;
         }
 
         error = xfs_swap_extents(ip, tip, sxp);
 
- out_put_target_file:
-        fput(target_file);
+ out_put_tmp_file:
+        fput(tmp_file);
  out_put_file:
         fput(file);
  out:
@@ -186,7 +192,7 @@ xfs_swap_extents_check_format(
         return 0;
 }
 
-int
+static int
 xfs_swap_extents(
         xfs_inode_t     *ip,    /* target inode */
         xfs_inode_t     *tip,   /* tmp inode */
@@ -254,6 +260,9 @@ xfs_swap_extents(
                 goto out_unlock;
         }
 
+        trace_xfs_swap_extent_before(ip, 0);
+        trace_xfs_swap_extent_before(tip, 1);
+
         /* check inode formats now that data is flushed */
         error = xfs_swap_extents_check_format(ip, tip);
         if (error) {
@@ -421,6 +430,8 @@ xfs_swap_extents(
 
         error = xfs_trans_commit(tp, XFS_TRANS_SWAPEXT);
 
+        trace_xfs_swap_extent_after(ip, 0);
+        trace_xfs_swap_extent_after(tip, 1);
 out:
         kmem_free(tempifp);
         return error;
diff --git a/fs/xfs/xfs_dfrag.h b/fs/xfs/xfs_dfrag.h
index 4f55a6306558..20bdd935c121 100644
--- a/fs/xfs/xfs_dfrag.h
+++ b/fs/xfs/xfs_dfrag.h
@@ -48,9 +48,6 @@ typedef struct xfs_swapext
  */
 int     xfs_swapext(struct xfs_swapext *sx);
 
-int     xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
-                struct xfs_swapext *sxp);
-
 #endif  /* __KERNEL__ */
 
 #endif  /* __XFS_DFRAG_H__ */
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index 93634a7e90e9..42520f041265 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -44,7 +44,7 @@
 #include "xfs_vnodeops.h"
 #include "xfs_trace.h"
 
-struct xfs_name xfs_name_dotdot = {"..", 2};
+struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2};
 
 /*
  * ASCII case-insensitive (ie. A-Z) support for directories that was
@@ -66,8 +66,8 @@ xfs_ascii_ci_hashname(
 STATIC enum xfs_dacmp
 xfs_ascii_ci_compname(
         struct xfs_da_args *args,
-        const char      *name,
-        int             len)
+        const unsigned char *name,
+        int             len)
 {
         enum xfs_dacmp  result;
         int             i;
@@ -247,7 +247,7 @@ xfs_dir_createname(
 int
 xfs_dir_cilookup_result(
         struct xfs_da_args *args,
-        const char      *name,
+        const unsigned char *name,
         int             len)
 {
         if (args->cmpresult == XFS_CMP_DIFFERENT)
diff --git a/fs/xfs/xfs_dir2.h b/fs/xfs/xfs_dir2.h
index 1d9ef96f33aa..74a3b1057685 100644
--- a/fs/xfs/xfs_dir2.h
+++ b/fs/xfs/xfs_dir2.h
@@ -100,7 +100,7 @@ extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp,
 extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
                                 struct xfs_dabuf *bp);
 
-extern int xfs_dir_cilookup_result(struct xfs_da_args *args, const char *name,
-                                int len);
+extern int xfs_dir_cilookup_result(struct xfs_da_args *args,
+                                const unsigned char *name, int len);
 
 #endif  /* __XFS_DIR2_H__ */
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index ddc4ecc7807f..779a267b0a84 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -57,8 +57,8 @@ static xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot;
 void
 xfs_dir_startup(void)
 {
-        xfs_dir_hash_dot = xfs_da_hashname(".", 1);
-        xfs_dir_hash_dotdot = xfs_da_hashname("..", 2);
+        xfs_dir_hash_dot = xfs_da_hashname((unsigned char *)".", 1);
+        xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2);
 }
 
 /*
@@ -513,8 +513,9 @@ xfs_dir2_block_getdents(
                 /*
                  * If it didn't fit, set the final offset to here & return.
                  */
-                if (filldir(dirent, dep->name, dep->namelen, cook & 0x7fffffff,
-                            be64_to_cpu(dep->inumber), DT_UNKNOWN)) {
+                if (filldir(dirent, (char *)dep->name, dep->namelen,
+                            cook & 0x7fffffff, be64_to_cpu(dep->inumber),
+                            DT_UNKNOWN)) {
                         *offset = cook & 0x7fffffff;
                         xfs_da_brelse(NULL, bp);
                         return 0;
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index 29f484c11b3a..e2d89854ec9e 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -1081,7 +1081,7 @@ xfs_dir2_leaf_getdents(
                 dep = (xfs_dir2_data_entry_t *)ptr;
                 length = xfs_dir2_data_entsize(dep->namelen);
 
-                if (filldir(dirent, dep->name, dep->namelen,
+                if (filldir(dirent, (char *)dep->name, dep->namelen,
                             xfs_dir2_byte_to_dataptr(mp, curoff) & 0x7fffffff,
                             be64_to_cpu(dep->inumber), DT_UNKNOWN))
                         break;
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index ce6e355199b5..78fc4d9ae756 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -65,7 +65,7 @@ static int xfs_dir2_node_addname_int(xfs_da_args_t *args,
 /*
  * Log entries from a freespace block.
  */
-void
+STATIC void
 xfs_dir2_free_log_bests(
         xfs_trans_t             *tp,            /* transaction pointer */
         xfs_dabuf_t             *bp,            /* freespace buffer */
diff --git a/fs/xfs/xfs_dir2_node.h b/fs/xfs/xfs_dir2_node.h
index dde72db3d695..82dfe7147195 100644
--- a/fs/xfs/xfs_dir2_node.h
+++ b/fs/xfs/xfs_dir2_node.h
@@ -75,8 +75,6 @@ xfs_dir2_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db)
         return ((db) % XFS_DIR2_MAX_FREE_BESTS(mp));
 }
 
-extern void xfs_dir2_free_log_bests(struct xfs_trans *tp, struct xfs_dabuf *bp,
-                                    int first, int last);
 extern int xfs_dir2_leaf_to_node(struct xfs_da_args *args,
                                  struct xfs_dabuf *lbp);
 extern xfs_dahash_t xfs_dir2_leafn_lasthash(struct xfs_dabuf *bp, int *count);
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/xfs_dir2_sf.c
index 9d4f17a69676..c1a5945d463a 100644
--- a/fs/xfs/xfs_dir2_sf.c
+++ b/fs/xfs/xfs_dir2_sf.c
@@ -782,7 +782,7 @@ xfs_dir2_sf_getdents(
                 }
 
                 ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
-                if (filldir(dirent, sfep->name, sfep->namelen,
+                if (filldir(dirent, (char *)sfep->name, sfep->namelen,
                             off & 0x7fffffff, ino, DT_UNKNOWN)) {
                         *offset = off & 0x7fffffff;
                         return 0;
diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index 05a4bdd4be39..6f35ed1b39b9 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -82,7 +82,7 @@ xfs_efi_item_format(xfs_efi_log_item_t	*efip,
 
         log_vector->i_addr = (xfs_caddr_t)&(efip->efi_format);
         log_vector->i_len = size;
-        XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFI_FORMAT);
+        log_vector->i_type = XLOG_REG_TYPE_EFI_FORMAT;
         ASSERT(size >= sizeof(xfs_efi_log_format_t));
 }
 
@@ -406,7 +406,7 @@ xfs_efd_item_format(xfs_efd_log_item_t	*efdp,
 
         log_vector->i_addr = (xfs_caddr_t)&(efdp->efd_format);
         log_vector->i_len = size;
-        XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFD_FORMAT);
+        log_vector->i_type = XLOG_REG_TYPE_EFD_FORMAT;
         ASSERT(size >= sizeof(xfs_efd_log_format_t));
 }
 
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
index a631e1451abb..390850ee6603 100644
--- a/fs/xfs/xfs_filestream.c
+++ b/fs/xfs/xfs_filestream.c
@@ -140,6 +140,7 @@ _xfs_filestream_pick_ag(
         int             flags,
         xfs_extlen_t    minlen)
 {
+        int             streams, max_streams;
         int             err, trylock, nscan;
         xfs_extlen_t    longest, free, minfree, maxfree = 0;
         xfs_agnumber_t  ag, max_ag = NULLAGNUMBER;
@@ -155,15 +156,15 @@ _xfs_filestream_pick_ag(
         trylock = XFS_ALLOC_FLAG_TRYLOCK;
 
         for (nscan = 0; 1; nscan++) {
-
-                TRACE_AG_SCAN(mp, ag, xfs_filestream_peek_ag(mp, ag));
-
-                pag = mp->m_perag + ag;
+                pag = xfs_perag_get(mp, ag);
+                TRACE_AG_SCAN(mp, ag, atomic_read(&pag->pagf_fstrms));
 
                 if (!pag->pagf_init) {
                         err = xfs_alloc_pagf_init(mp, NULL, ag, trylock);
-                        if (err && !trylock)
+                        if (err && !trylock) {
+                                xfs_perag_put(pag);
                                 return err;
+                        }
                 }
 
                 /* Might fail sometimes during the 1st pass with trylock set. */
@@ -173,6 +174,7 @@ _xfs_filestream_pick_ag(
                 /* Keep track of the AG with the most free blocks. */
                 if (pag->pagf_freeblks > maxfree) {
                         maxfree = pag->pagf_freeblks;
+                        max_streams = atomic_read(&pag->pagf_fstrms);
                         max_ag = ag;
                 }
 
@@ -195,6 +197,8 @@ _xfs_filestream_pick_ag(
 
                         /* Break out, retaining the reference on the AG. */
                         free = pag->pagf_freeblks;
+                        streams = atomic_read(&pag->pagf_fstrms);
+                        xfs_perag_put(pag);
                         *agp = ag;
                         break;
                 }
@@ -202,6 +206,7 @@ _xfs_filestream_pick_ag(
                 /* Drop the reference on this AG, it's not usable. */
                 xfs_filestream_put_ag(mp, ag);
 next_ag:
+                xfs_perag_put(pag);
                 /* Move to the next AG, wrapping to AG 0 if necessary. */
                 if (++ag >= mp->m_sb.sb_agcount)
                         ag = 0;
@@ -229,6 +234,7 @@ next_ag:
                 if (max_ag != NULLAGNUMBER) {
                         xfs_filestream_get_ag(mp, max_ag);
                         TRACE_AG_PICK1(mp, max_ag, maxfree);
+                        streams = max_streams;
                         free = maxfree;
                         *agp = max_ag;
                         break;
@@ -240,16 +246,14 @@ next_ag:
                 return 0;
         }
 
-        TRACE_AG_PICK2(mp, startag, *agp, xfs_filestream_peek_ag(mp, *agp),
-                        free, nscan, flags);
+        TRACE_AG_PICK2(mp, startag, *agp, streams, free, nscan, flags);
 
         return 0;
 }
 
 /*
  * Set the allocation group number for a file or a directory, updating inode
- * references and per-AG references as appropriate.  Must be called with the
- * m_peraglock held in read mode.
+ * references and per-AG references as appropriate.
  */
 static int
 _xfs_filestream_update_ag(
@@ -451,20 +455,6 @@ xfs_filestream_unmount(
 }
 
 /*
- * If the mount point's m_perag array is going to be reallocated, all
- * outstanding cache entries must be flushed to avoid accessing reference count
- * addresses that have been freed.  The call to xfs_filestream_flush() must be
- * made inside the block that holds the m_peraglock in write mode to do the
- * reallocation.
- */
-void
-xfs_filestream_flush(
-        xfs_mount_t     *mp)
-{
-        xfs_mru_cache_flush(mp->m_filestream);
-}
-
-/*
  * Return the AG of the filestream the file or directory belongs to, or
  * NULLAGNUMBER otherwise.
  */
@@ -526,7 +516,6 @@ xfs_filestream_associate(
 
         mp = pip->i_mount;
         cache = mp->m_filestream;
-        down_read(&mp->m_peraglock);
 
         /*
          * We have a problem, Houston.
@@ -543,10 +532,8 @@ xfs_filestream_associate(
          *
          * So, if we can't get the iolock without sleeping then just give up
          */
-        if (!xfs_ilock_nowait(pip, XFS_IOLOCK_EXCL)) {
-                up_read(&mp->m_peraglock);
+        if (!xfs_ilock_nowait(pip, XFS_IOLOCK_EXCL))
                 return 1;
-        }
 
         /* If the parent directory is already in the cache, use its AG. */
         item = xfs_mru_cache_lookup(cache, pip->i_ino);
@@ -601,7 +588,6 @@ exit_did_pick:
 
 exit:
         xfs_iunlock(pip, XFS_IOLOCK_EXCL);
-        up_read(&mp->m_peraglock);
         return -err;
 }
 
diff --git a/fs/xfs/xfs_filestream.h b/fs/xfs/xfs_filestream.h
index 4aba67c5f64f..260f757bbc5d 100644
--- a/fs/xfs/xfs_filestream.h
+++ b/fs/xfs/xfs_filestream.h
@@ -79,12 +79,21 @@ extern ktrace_t *xfs_filestreams_trace_buf;
  * the cache that reference per-ag array elements that have since been
  * reallocated.
  */
+/*
+ * xfs_filestream_peek_ag is only used in tracing code
+ */
 static inline int
 xfs_filestream_peek_ag(
         xfs_mount_t     *mp,
         xfs_agnumber_t  agno)
 {
-        return atomic_read(&mp->m_perag[agno].pagf_fstrms);
+        struct xfs_perag *pag;
+        int             ret;
+
+        pag = xfs_perag_get(mp, agno);
+        ret = atomic_read(&pag->pagf_fstrms);
+        xfs_perag_put(pag);
+        return ret;
 }
 
 static inline int
@@ -92,7 +101,13 @@ xfs_filestream_get_ag(
         xfs_mount_t     *mp,
         xfs_agnumber_t  agno)
 {
-        return atomic_inc_return(&mp->m_perag[agno].pagf_fstrms);
+        struct xfs_perag *pag;
+        int             ret;
+
+        pag = xfs_perag_get(mp, agno);
+        ret = atomic_inc_return(&pag->pagf_fstrms);
+        xfs_perag_put(pag);
+        return ret;
 }
 
 static inline int
@@ -100,7 +115,13 @@ xfs_filestream_put_ag(
         xfs_mount_t     *mp,
         xfs_agnumber_t  agno)
 {
-        return atomic_dec_return(&mp->m_perag[agno].pagf_fstrms);
+        struct xfs_perag *pag;
+        int             ret;
+
+        pag = xfs_perag_get(mp, agno);
+        ret = atomic_dec_return(&pag->pagf_fstrms);
+        xfs_perag_put(pag);
+        return ret;
 }
 
 /* allocation selection flags */
@@ -114,7 +135,6 @@ int xfs_filestream_init(void);
 void xfs_filestream_uninit(void);
 int xfs_filestream_mount(struct xfs_mount *mp);
 void xfs_filestream_unmount(struct xfs_mount *mp);
-void xfs_filestream_flush(struct xfs_mount *mp);
 xfs_agnumber_t xfs_filestream_lookup_ag(struct xfs_inode *ip);
 int xfs_filestream_associate(struct xfs_inode *dip, struct xfs_inode *ip);
 void xfs_filestream_deassociate(struct xfs_inode *ip);
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index a13919a6a364..37a6f62c57b6 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -167,27 +167,14 @@ xfs_growfs_data_private(
         }
         new = nb - mp->m_sb.sb_dblocks;
         oagcount = mp->m_sb.sb_agcount;
-        if (nagcount > oagcount) {
-                void *new_perag, *old_perag;
-
-                xfs_filestream_flush(mp);
-
-                new_perag = kmem_zalloc(sizeof(xfs_perag_t) * nagcount,
-                                        KM_MAYFAIL);
-                if (!new_perag)
-                        return XFS_ERROR(ENOMEM);
-
-                down_write(&mp->m_peraglock);
-                memcpy(new_perag, mp->m_perag, sizeof(xfs_perag_t) * oagcount);
-                old_perag = mp->m_perag;
-                mp->m_perag = new_perag;
-
-                mp->m_flags |= XFS_MOUNT_32BITINODES;
-                nagimax = xfs_initialize_perag(mp, nagcount);
-                up_write(&mp->m_peraglock);
 
-                kmem_free(old_perag);
+        /* allocate the new per-ag structures */
+        if (nagcount > oagcount) {
+                error = xfs_initialize_perag(mp, nagcount, &nagimax);
+                if (error)
+                        return error;
         }
+
         tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
         tp->t_flags |= XFS_TRANS_RESERVE;
         if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp),
@@ -196,6 +183,11 @@ xfs_growfs_data_private(
                 return error;
         }
 
+        /*
+         * Write new AG headers to disk. Non-transactional, but written
+         * synchronously so they are completed prior to the growfs transaction
+         * being logged.
+         */
         nfree = 0;
         for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
                 /*
@@ -359,6 +351,12 @@ xfs_growfs_data_private(
                         goto error0;
                 }
         }
+
+        /*
+         * Update changed superblock fields transactionally. These are not
+         * seen by the rest of the world until the transaction commit applies
+         * them atomically to the superblock.
+         */
         if (nagcount > oagcount)
                 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
         if (nb > mp->m_sb.sb_dblocks)
@@ -369,9 +367,9 @@ xfs_growfs_data_private(
         if (dpct)
                 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
         error = xfs_trans_commit(tp, 0);
-        if (error) {
+        if (error)
                 return error;
-        }
+
         /* New allocation groups fully initialized, so update mount struct */
         if (nagimax)
                 mp->m_maxagi = nagimax;
@@ -381,6 +379,8 @@ xfs_growfs_data_private(
                 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
         } else
                 mp->m_maxicount = 0;
+
+        /* update secondary superblocks. */
         for (agno = 1; agno < nagcount; agno++) {
                 error = xfs_read_buf(mp, mp->m_ddev_targp,
                                   XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index cb907ba69c4c..9d884c127bb9 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -205,7 +205,7 @@ xfs_ialloc_inode_init(
                 d = XFS_AGB_TO_DADDR(mp, agno, agbno + (j * blks_per_cluster));
                 fbuf = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
                                          mp->m_bsize * blks_per_cluster,
-                                         XFS_BUF_LOCK);
+                                         XBF_LOCK);
                 ASSERT(fbuf);
                 ASSERT(!XFS_BUF_GETERROR(fbuf));
 
@@ -253,6 +253,7 @@ xfs_ialloc_ag_alloc(
         xfs_agino_t     thisino;        /* current inode number, for loop */
         int             isaligned = 0;  /* inode allocation at stripe unit */
                                         /* boundary */
+        struct xfs_perag *pag;
 
         args.tp = tp;
         args.mp = tp->t_mountp;
@@ -382,9 +383,9 @@ xfs_ialloc_ag_alloc(
         newino = XFS_OFFBNO_TO_AGINO(args.mp, args.agbno, 0);
         be32_add_cpu(&agi->agi_count, newlen);
         be32_add_cpu(&agi->agi_freecount, newlen);
-        down_read(&args.mp->m_peraglock);
-        args.mp->m_perag[agno].pagi_freecount += newlen;
-        up_read(&args.mp->m_peraglock);
+        pag = xfs_perag_get(args.mp, agno);
+        pag->pagi_freecount += newlen;
+        xfs_perag_put(pag);
         agi->agi_newino = cpu_to_be32(newino);
 
         /*
@@ -486,9 +487,8 @@ xfs_ialloc_ag_select(
          */
         agno = pagno;
         flags = XFS_ALLOC_FLAG_TRYLOCK;
-        down_read(&mp->m_peraglock);
         for (;;) {
-                pag = &mp->m_perag[agno];
+                pag = xfs_perag_get(mp, agno);
                 if (!pag->pagi_init) {
                         if (xfs_ialloc_read_agi(mp, tp, agno, &agbp)) {
                                 agbp = NULL;
@@ -527,7 +527,7 @@ xfs_ialloc_ag_select(
                                         agbp = NULL;
                                         goto nextag;
                                 }
-                                up_read(&mp->m_peraglock);
+                                xfs_perag_put(pag);
                                 return agbp;
                         }
                 }
@@ -535,22 +535,19 @@ unlock_nextag:
                 if (agbp)
                         xfs_trans_brelse(tp, agbp);
 nextag:
+                xfs_perag_put(pag);
                 /*
                  * No point in iterating over the rest, if we're shutting
                  * down.
                  */
-                if (XFS_FORCED_SHUTDOWN(mp)) {
-                        up_read(&mp->m_peraglock);
+                if (XFS_FORCED_SHUTDOWN(mp))
                         return NULL;
-                }
                 agno++;
                 if (agno >= agcount)
                         agno = 0;
                 if (agno == pagno) {
-                        if (flags == 0) {
-                                up_read(&mp->m_peraglock);
+                        if (flags == 0)
                                 return NULL;
-                        }
                         flags = 0;
                 }
         }
@@ -672,6 +669,7 @@ xfs_dialloc(
         xfs_agnumber_t  tagno;          /* testing allocation group number */
         xfs_btree_cur_t *tcur;          /* temp cursor */
         xfs_inobt_rec_incore_t trec;    /* temp inode allocation record */
+        struct xfs_perag *pag;
 
 
         if (*IO_agbp == NULL) {
@@ -771,13 +769,13 @@ nextag:
                         *inop = NULLFSINO;
                         return noroom ? ENOSPC : 0;
                 }
-                down_read(&mp->m_peraglock);
-                if (mp->m_perag[tagno].pagi_inodeok == 0) {
-                        up_read(&mp->m_peraglock);
+                pag = xfs_perag_get(mp, tagno);
+                if (pag->pagi_inodeok == 0) {
+                        xfs_perag_put(pag);
                         goto nextag;
                 }
                 error = xfs_ialloc_read_agi(mp, tp, tagno, &agbp);
-                up_read(&mp->m_peraglock);
+                xfs_perag_put(pag);
                 if (error)
                         goto nextag;
                 agi = XFS_BUF_TO_AGI(agbp);
@@ -790,6 +788,7 @@ nextag:
          */
         agno = tagno;
         *IO_agbp = NULL;
+        pag = xfs_perag_get(mp, agno);
 
  restart_pagno:
         cur = xfs_inobt_init_cursor(mp, tp, agbp, be32_to_cpu(agi->agi_seqno));
@@ -808,7 +807,6 @@ nextag:
          * If in the same AG as the parent, try to get near the parent.
          */
         if (pagno == agno) {
-                xfs_perag_t     *pag = &mp->m_perag[agno];
                 int             doneleft;       /* done, to the left */
                 int             doneright;      /* done, to the right */
                 int             searchdistance = 10;
@@ -1006,9 +1004,7 @@ alloc_inode:
                 goto error0;
         be32_add_cpu(&agi->agi_freecount, -1);
         xfs_ialloc_log_agi(tp, agbp, XFS_AGI_FREECOUNT);
-        down_read(&mp->m_peraglock);
-        mp->m_perag[tagno].pagi_freecount--;
-        up_read(&mp->m_peraglock);
+        pag->pagi_freecount--;
 
         error = xfs_check_agi_freecount(cur, agi);
         if (error)
@@ -1016,12 +1012,14 @@ alloc_inode:
 
         xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
         xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -1);
+        xfs_perag_put(pag);
         *inop = ino;
         return 0;
 error1:
         xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR);
 error0:
         xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
+        xfs_perag_put(pag);
         return error;
 }
 
@@ -1052,6 +1050,7 @@ xfs_difree(
         xfs_mount_t     *mp;    /* mount structure for filesystem */
         int             off;    /* offset of inode in inode chunk */
         xfs_inobt_rec_incore_t rec;     /* btree record */
+        struct xfs_perag *pag;
 
         mp = tp->t_mountp;
 
@@ -1088,9 +1087,7 @@ xfs_difree(
         /*
          * Get the allocation group header.
          */
-        down_read(&mp->m_peraglock);
         error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
-        up_read(&mp->m_peraglock);
         if (error) {
                 cmn_err(CE_WARN,
                         "xfs_difree: xfs_ialloc_read_agi() returned an error %d on %s.  Returning error.",
@@ -1157,9 +1154,9 @@ xfs_difree(
                 be32_add_cpu(&agi->agi_count, -ilen);
                 be32_add_cpu(&agi->agi_freecount, -(ilen - 1));
                 xfs_ialloc_log_agi(tp, agbp, XFS_AGI_COUNT | XFS_AGI_FREECOUNT);
-                down_read(&mp->m_peraglock);
-                mp->m_perag[agno].pagi_freecount -= ilen - 1;
-                up_read(&mp->m_peraglock);
+                pag = xfs_perag_get(mp, agno);
+                pag->pagi_freecount -= ilen - 1;
+                xfs_perag_put(pag);
                 xfs_trans_mod_sb(tp, XFS_TRANS_SB_ICOUNT, -ilen);
                 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -(ilen - 1));
 
@@ -1188,9 +1185,9 @@ xfs_difree(
                  */
                 be32_add_cpu(&agi->agi_freecount, 1);
                 xfs_ialloc_log_agi(tp, agbp, XFS_AGI_FREECOUNT);
-                down_read(&mp->m_peraglock);
-                mp->m_perag[agno].pagi_freecount++;
-                up_read(&mp->m_peraglock);
+                pag = xfs_perag_get(mp, agno);
+                pag->pagi_freecount++;
+                xfs_perag_put(pag);
                 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, 1);
         }
 
@@ -1312,9 +1309,7 @@ xfs_imap(
                 xfs_buf_t       *agbp;  /* agi buffer */
                 int             i;      /* temp state */
 
-                down_read(&mp->m_peraglock);
                 error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
-                up_read(&mp->m_peraglock);
                 if (error) {
                         xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: "
                                         "xfs_ialloc_read_agi() returned "
@@ -1379,7 +1374,6 @@ xfs_imap(
                         XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks));
                 return XFS_ERROR(EINVAL);
         }
-
         return 0;
 }
 
@@ -1523,8 +1517,7 @@ xfs_ialloc_read_agi(
                 return error;
 
         agi = XFS_BUF_TO_AGI(*bpp);
-        pag = &mp->m_perag[agno];
-
+        pag = xfs_perag_get(mp, agno);
         if (!pag->pagi_init) {
                 pag->pagi_freecount = be32_to_cpu(agi->agi_freecount);
                 pag->pagi_count = be32_to_cpu(agi->agi_count);
@@ -1537,6 +1530,7 @@ xfs_ialloc_read_agi(
          */
         ASSERT(pag->pagi_freecount == be32_to_cpu(agi->agi_freecount) ||
                 XFS_FORCED_SHUTDOWN(mp));
+        xfs_perag_put(pag);
         return 0;
 }
 
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index 155e798f30a1..e281eb4a1c49 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -374,7 +374,7 @@ xfs_iget(
                 return EINVAL;
 
         /* get the perag structure and ensure that it's inode capable */
-        pag = xfs_get_perag(mp, ino);
+        pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino));
         if (!pag->pagi_inodeok)
                 return EINVAL;
         ASSERT(pag->pag_ici_init);
@@ -398,7 +398,7 @@ again:
                 if (error)
                         goto out_error_or_again;
         }
-        xfs_put_perag(mp, pag);
+        xfs_perag_put(pag);
 
         *ipp = ip;
 
@@ -417,7 +417,7 @@ out_error_or_again:
                 delay(1);
                 goto again;
         }
-        xfs_put_perag(mp, pag);
+        xfs_perag_put(pag);
         return error;
 }
 
@@ -488,12 +488,12 @@ xfs_ireclaim(
          * added to the tree assert that it's been there before to catch
          * problems with the inode life time early on.
          */
-        pag = xfs_get_perag(mp, ip->i_ino);
+        pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
         write_lock(&pag->pag_ici_lock);
         if (!radix_tree_delete(&pag->pag_ici_root, agino))
                 ASSERT(0);
         write_unlock(&pag->pag_ici_lock);
-        xfs_put_perag(mp, pag);
+        xfs_perag_put(pag);
 
         /*
          * Here we do an (almost) spurious inode lock in order to coordinate
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index ef77fd88c8e3..fa31360046d4 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -151,7 +151,7 @@ xfs_imap_to_bp(
                                 "an error %d on %s.  Returning error.",
                                 error, mp->m_fsname);
                 } else {
-                        ASSERT(buf_flags & XFS_BUF_TRYLOCK);
+                        ASSERT(buf_flags & XBF_TRYLOCK);
                 }
                 return error;
         }
@@ -239,7 +239,7 @@ xfs_inotobp(
         if (error)
                 return error;
 
-        error = xfs_imap_to_bp(mp, tp, &imap, &bp, XFS_BUF_LOCK, imap_flags);
+        error = xfs_imap_to_bp(mp, tp, &imap, &bp, XBF_LOCK, imap_flags);
         if (error)
                 return error;
 
@@ -285,7 +285,7 @@ xfs_itobp(
                 return error;
 
         if (!bp) {
-                ASSERT(buf_flags & XFS_BUF_TRYLOCK);
+                ASSERT(buf_flags & XBF_TRYLOCK);
                 ASSERT(tp == NULL);
                 *bpp = NULL;
                 return EAGAIN;
@@ -807,7 +807,7 @@ xfs_iread(
          * Get pointers to the on-disk inode and the buffer containing it.
          */
         error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &bp,
-                               XFS_BUF_LOCK, iget_flags);
+                               XBF_LOCK, iget_flags);
         if (error)
                 return error;
         dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset);
@@ -1751,7 +1751,7 @@ xfs_iunlink(
                  * Here we put the head pointer into our next pointer,
                  * and then we fall through to point the head at us.
                  */
-                error = xfs_itobp(mp, tp, ip, &dip, &ibp, XFS_BUF_LOCK);
+                error = xfs_itobp(mp, tp, ip, &dip, &ibp, XBF_LOCK);
                 if (error)
                         return error;
 
@@ -1833,7 +1833,7 @@ xfs_iunlink_remove(
                  * of dealing with the buffer when there is no need to
                  * change it.
                  */
-                error = xfs_itobp(mp, tp, ip, &dip, &ibp, XFS_BUF_LOCK);
+                error = xfs_itobp(mp, tp, ip, &dip, &ibp, XBF_LOCK);
                 if (error) {
                         cmn_err(CE_WARN,
                                 "xfs_iunlink_remove: xfs_itobp()  returned an error %d on %s.  Returning error.",
@@ -1895,7 +1895,7 @@ xfs_iunlink_remove(
                  * Now last_ibp points to the buffer previous to us on
                  * the unlinked list.  Pull us from the list.
                  */
-                error = xfs_itobp(mp, tp, ip, &dip, &ibp, XFS_BUF_LOCK);
+                error = xfs_itobp(mp, tp, ip, &dip, &ibp, XBF_LOCK);
                 if (error) {
                         cmn_err(CE_WARN,
                                 "xfs_iunlink_remove: xfs_itobp()  returned an error %d on %s.  Returning error.",
@@ -1946,8 +1946,9 @@ xfs_ifree_cluster(
         xfs_inode_t             *ip, **ip_found;
         xfs_inode_log_item_t    *iip;
         xfs_log_item_t          *lip;
-        xfs_perag_t             *pag = xfs_get_perag(mp, inum);
+        struct xfs_perag        *pag;
 
+        pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum));
         if (mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp)) {
                 blks_per_cluster = 1;
                 ninodes = mp->m_sb.sb_inopblock;
@@ -2039,7 +2040,7 @@ xfs_ifree_cluster(
 
                 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, 
                                         mp->m_bsize * blks_per_cluster,
-                                        XFS_BUF_LOCK);
+                                        XBF_LOCK);
 
                 pre_flushed = 0;
                 lip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *);
@@ -2088,7 +2089,7 @@ xfs_ifree_cluster(
         }
 
         kmem_free(ip_found);
-        xfs_put_perag(mp, pag);
+        xfs_perag_put(pag);
 }
 
 /*
@@ -2150,7 +2151,7 @@ xfs_ifree(
 
         xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 
-        error = xfs_itobp(ip->i_mount, tp, ip, &dip, &ibp, XFS_BUF_LOCK);
+        error = xfs_itobp(ip->i_mount, tp, ip, &dip, &ibp, XBF_LOCK);
         if (error)
                 return error;
 
@@ -2483,13 +2484,16 @@ __xfs_iunpin_wait(
                 return;
 
         /* Give the log a push to start the unpinning I/O */
-        xfs_log_force(ip->i_mount, (iip && iip->ili_last_lsn) ?
-                                iip->ili_last_lsn : 0, XFS_LOG_FORCE);
+        if (iip && iip->ili_last_lsn)
+                xfs_log_force_lsn(ip->i_mount, iip->ili_last_lsn, 0);
+        else
+                xfs_log_force(ip->i_mount, 0);
+
         if (wait)
                 wait_event(ip->i_ipin_wait, (atomic_read(&ip->i_pincount) == 0));
 }
 
-static inline void
+void
 xfs_iunpin_wait(
         xfs_inode_t     *ip)
 {
@@ -2675,7 +2679,7 @@ xfs_iflush_cluster(
         xfs_buf_t       *bp)
 {
         xfs_mount_t             *mp = ip->i_mount;
-        xfs_perag_t             *pag = xfs_get_perag(mp, ip->i_ino);
+        struct xfs_perag        *pag;
         unsigned long           first_index, mask;
         unsigned long           inodes_per_cluster;
         int                     ilist_size;
@@ -2686,6 +2690,7 @@ xfs_iflush_cluster(
         int                     bufwasdelwri;
         int                     i;
 
+        pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
         ASSERT(pag->pagi_inodeok);
         ASSERT(pag->pag_ici_init);
 
@@ -2693,7 +2698,7 @@ xfs_iflush_cluster(
         ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *);
         ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS);
         if (!ilist)
-                return 0;
+                goto out_put;
 
         mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1);
         first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask;
@@ -2762,6 +2767,8 @@ xfs_iflush_cluster(
 out_free:
         read_unlock(&pag->pag_ici_lock);
         kmem_free(ilist);
+out_put:
+        xfs_perag_put(pag);
         return 0;
 
 
@@ -2805,6 +2812,7 @@ cluster_corrupt_out:
          */
         xfs_iflush_abort(iq);
         kmem_free(ilist);
+        xfs_perag_put(pag);
         return XFS_ERROR(EFSCORRUPTED);
 }
 
@@ -2827,8 +2835,6 @@ xfs_iflush(
         xfs_dinode_t            *dip;
         xfs_mount_t             *mp;
         int                     error;
-        int                     noblock = (flags == XFS_IFLUSH_ASYNC_NOBLOCK);
-        enum { INT_DELWRI = (1 << 0), INT_ASYNC = (1 << 1) };
 
         XFS_STATS_INC(xs_iflush_count);
 
@@ -2841,15 +2847,6 @@ xfs_iflush(
         mp = ip->i_mount;
 
         /*
-         * If the inode isn't dirty, then just release the inode flush lock and
-         * do nothing.
-         */
-        if (xfs_inode_clean(ip)) {
-                xfs_ifunlock(ip);
-                return 0;
-        }
-
-        /*
          * We can't flush the inode until it is unpinned, so wait for it if we
          * are allowed to block.  We know noone new can pin it, because we are
          * holding the inode lock shared and you need to hold it exclusively to
@@ -2860,7 +2857,7 @@ xfs_iflush(
          * in the same cluster are dirty, they will probably write the inode
          * out for us if they occur after the log force completes.
          */
-        if (noblock && xfs_ipincount(ip)) {
+        if (!(flags & SYNC_WAIT) && xfs_ipincount(ip)) {
                 xfs_iunpin_nowait(ip);
                 xfs_ifunlock(ip);
                 return EAGAIN;
@@ -2894,60 +2891,10 @@ xfs_iflush(
         }
 
         /*
-         * Decide how buffer will be flushed out.  This is done before
-         * the call to xfs_iflush_int because this field is zeroed by it.
-         */
-        if (iip != NULL && iip->ili_format.ilf_fields != 0) {
-                /*
-                 * Flush out the inode buffer according to the directions
-                 * of the caller.  In the cases where the caller has given
-                 * us a choice choose the non-delwri case.  This is because
-                 * the inode is in the AIL and we need to get it out soon.
-                 */
-                switch (flags) {
-                case XFS_IFLUSH_SYNC:
-                case XFS_IFLUSH_DELWRI_ELSE_SYNC:
-                        flags = 0;
-                        break;
-                case XFS_IFLUSH_ASYNC_NOBLOCK:
-                case XFS_IFLUSH_ASYNC:
-                case XFS_IFLUSH_DELWRI_ELSE_ASYNC:
-                        flags = INT_ASYNC;
-                        break;
-                case XFS_IFLUSH_DELWRI:
-                        flags = INT_DELWRI;
-                        break;
-                default:
-                        ASSERT(0);
-                        flags = 0;
-                        break;
-                }
-        } else {
-                switch (flags) {
-                case XFS_IFLUSH_DELWRI_ELSE_SYNC:
-                case XFS_IFLUSH_DELWRI_ELSE_ASYNC:
-                case XFS_IFLUSH_DELWRI:
-                        flags = INT_DELWRI;
-                        break;
-                case XFS_IFLUSH_ASYNC_NOBLOCK:
-                case XFS_IFLUSH_ASYNC:
-                        flags = INT_ASYNC;
-                        break;
-                case XFS_IFLUSH_SYNC:
-                        flags = 0;
-                        break;
-                default:
-                        ASSERT(0);
-                        flags = 0;
-                        break;
-                }
-        }
-
-        /*
          * Get the buffer containing the on-disk inode.
          */
         error = xfs_itobp(mp, NULL, ip, &dip, &bp,
-                                noblock ? XFS_BUF_TRYLOCK : XFS_BUF_LOCK);
+                                (flags & SYNC_WAIT) ? XBF_LOCK : XBF_TRYLOCK);
         if (error || !bp) {
                 xfs_ifunlock(ip);
                 return error;
@@ -2965,7 +2912,7 @@ xfs_iflush(
          * get stuck waiting in the write for too long.
          */
         if (XFS_BUF_ISPINNED(bp))
-                xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
+                xfs_log_force(mp, 0);
 
         /*
          * inode clustering:
@@ -2975,13 +2922,10 @@ xfs_iflush(
         if (error)
                 goto cluster_corrupt_out;
 
-        if (flags & INT_DELWRI) {
-                xfs_bdwrite(mp, bp);
-        } else if (flags & INT_ASYNC) {
-                error = xfs_bawrite(mp, bp);
-        } else {
+        if (flags & SYNC_WAIT)
                 error = xfs_bwrite(mp, bp);
-        }
+        else
+                xfs_bdwrite(mp, bp);
         return error;
 
 corrupt_out:
@@ -3016,16 +2960,6 @@ xfs_iflush_int(
         iip = ip->i_itemp;
         mp = ip->i_mount;
 
-
-        /*
-         * If the inode isn't dirty, then just release the inode
-         * flush lock and do nothing.
-         */
-        if (xfs_inode_clean(ip)) {
-                xfs_ifunlock(ip);
-                return 0;
-        }
-
         /* set *dip = inode's place in the buffer */
         dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset);
 
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index ec1f28c4fc4f..6c912b027596 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -420,16 +420,6 @@ static inline void xfs_ifunlock(xfs_inode_t *ip)
 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 
 /*
- * Flags for xfs_iflush()
- */
-#define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
-#define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
-#define XFS_IFLUSH_SYNC                 3
-#define XFS_IFLUSH_ASYNC                4
-#define XFS_IFLUSH_DELWRI               5
-#define XFS_IFLUSH_ASYNC_NOBLOCK        6
-
-/*
  * Flags for xfs_itruncate_start().
  */
 #define XFS_ITRUNC_DEFINITE     0x1
@@ -483,6 +473,7 @@ int		xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 void            xfs_ipin(xfs_inode_t *);
 void            xfs_iunpin(xfs_inode_t *);
+void            xfs_iunpin_wait(xfs_inode_t *);
 int             xfs_iflush(xfs_inode_t *, uint);
 void            xfs_ichgtime(xfs_inode_t *, int);
 void            xfs_lock_inodes(xfs_inode_t **, int, uint);
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index f38855d21ea5..d4dc063111f8 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -228,7 +228,7 @@ xfs_inode_item_format(
 
         vecp->i_addr = (xfs_caddr_t)&iip->ili_format;
         vecp->i_len  = sizeof(xfs_inode_log_format_t);
-        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IFORMAT);
+        vecp->i_type = XLOG_REG_TYPE_IFORMAT;
         vecp++;
         nvecs        = 1;
 
@@ -279,7 +279,7 @@ xfs_inode_item_format(
 
         vecp->i_addr = (xfs_caddr_t)&ip->i_d;
         vecp->i_len  = sizeof(struct xfs_icdinode);
-        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ICORE);
+        vecp->i_type = XLOG_REG_TYPE_ICORE;
         vecp++;
         nvecs++;
         iip->ili_format.ilf_fields |= XFS_ILOG_CORE;
@@ -336,7 +336,7 @@ xfs_inode_item_format(
                                 vecp->i_addr =
                                         (char *)(ip->i_df.if_u1.if_extents);
                                 vecp->i_len = ip->i_df.if_bytes;
-                                XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IEXT);
+                                vecp->i_type = XLOG_REG_TYPE_IEXT;
                         } else
 #endif
                         {
@@ -355,7 +355,7 @@ xfs_inode_item_format(
                                 vecp->i_addr = (xfs_caddr_t)ext_buffer;
                                 vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
                                                 XFS_DATA_FORK);
-                                XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IEXT);
+                                vecp->i_type = XLOG_REG_TYPE_IEXT;
                         }
                         ASSERT(vecp->i_len <= ip->i_df.if_bytes);
                         iip->ili_format.ilf_dsize = vecp->i_len;
@@ -373,7 +373,7 @@ xfs_inode_item_format(
                         ASSERT(ip->i_df.if_broot != NULL);
                         vecp->i_addr = (xfs_caddr_t)ip->i_df.if_broot;
                         vecp->i_len = ip->i_df.if_broot_bytes;
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IBROOT);
+                        vecp->i_type = XLOG_REG_TYPE_IBROOT;
                         vecp++;
                         nvecs++;
                         iip->ili_format.ilf_dsize = ip->i_df.if_broot_bytes;
@@ -399,7 +399,7 @@ xfs_inode_item_format(
                         ASSERT((ip->i_df.if_real_bytes == 0) ||
                                (ip->i_df.if_real_bytes == data_bytes));
                         vecp->i_len = (int)data_bytes;
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_ILOCAL);
+                        vecp->i_type = XLOG_REG_TYPE_ILOCAL;
                         vecp++;
                         nvecs++;
                         iip->ili_format.ilf_dsize = (unsigned)data_bytes;
@@ -477,7 +477,7 @@ xfs_inode_item_format(
                         vecp->i_len = xfs_iextents_copy(ip, ext_buffer,
                                         XFS_ATTR_FORK);
 #endif
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_EXT);
+                        vecp->i_type = XLOG_REG_TYPE_IATTR_EXT;
                         iip->ili_format.ilf_asize = vecp->i_len;
                         vecp++;
                         nvecs++;
@@ -492,7 +492,7 @@ xfs_inode_item_format(
                         ASSERT(ip->i_afp->if_broot != NULL);
                         vecp->i_addr = (xfs_caddr_t)ip->i_afp->if_broot;
                         vecp->i_len = ip->i_afp->if_broot_bytes;
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_BROOT);
+                        vecp->i_type = XLOG_REG_TYPE_IATTR_BROOT;
                         vecp++;
                         nvecs++;
                         iip->ili_format.ilf_asize = ip->i_afp->if_broot_bytes;
@@ -516,7 +516,7 @@ xfs_inode_item_format(
                         ASSERT((ip->i_afp->if_real_bytes == 0) ||
                                (ip->i_afp->if_real_bytes == data_bytes));
                         vecp->i_len = (int)data_bytes;
-                        XLOG_VEC_SET_TYPE(vecp, XLOG_REG_TYPE_IATTR_LOCAL);
+                        vecp->i_type = XLOG_REG_TYPE_IATTR_LOCAL;
                         vecp++;
                         nvecs++;
                         iip->ili_format.ilf_asize = (unsigned)data_bytes;
@@ -602,33 +602,20 @@ xfs_inode_item_trylock(
 
         if (!xfs_iflock_nowait(ip)) {
                 /*
-                 * If someone else isn't already trying to push the inode
-                 * buffer, we get to do it.
+                 * inode has already been flushed to the backing buffer,
+                 * leave it locked in shared mode, pushbuf routine will
+                 * unlock it.
                  */
-                if (iip->ili_pushbuf_flag == 0) {
-                        iip->ili_pushbuf_flag = 1;
-#ifdef DEBUG
-                        iip->ili_push_owner = current_pid();
-#endif
-                        /*
-                         * Inode is left locked in shared mode.
-                         * Pushbuf routine gets to unlock it.
-                         */
-                        return XFS_ITEM_PUSHBUF;
-                } else {
-                        /*
-                         * We hold the AIL lock, so we must specify the
-                         * NONOTIFY flag so that we won't double trip.
-                         */
-                        xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
-                        return XFS_ITEM_FLUSHING;
-                }
-                /* NOTREACHED */
+                return XFS_ITEM_PUSHBUF;
         }
 
         /* Stale items should force out the iclog */
         if (ip->i_flags & XFS_ISTALE) {
                 xfs_ifunlock(ip);
+                /*
+                 * we hold the AIL lock - notify the unlock routine of this
+                 * so it doesn't try to get the lock again.
+                 */
                 xfs_iunlock(ip, XFS_ILOCK_SHARED|XFS_IUNLOCK_NONOTIFY);
                 return XFS_ITEM_PINNED;
         }
@@ -746,11 +733,8 @@ xfs_inode_item_committed(
  * This gets called by xfs_trans_push_ail(), when IOP_TRYLOCK
  * failed to get the inode flush lock but did get the inode locked SHARED.
  * Here we're trying to see if the inode buffer is incore, and if so whether it's
- * marked delayed write. If that's the case, we'll initiate a bawrite on that
- * buffer to expedite the process.
- *
- * We aren't holding the AIL lock (or the flush lock) when this gets called,
- * so it is inherently race-y.
+ * marked delayed write. If that's the case, we'll promote it and that will
+ * allow the caller to write the buffer by triggering the xfsbufd to run.
  */
 STATIC void
 xfs_inode_item_pushbuf(
@@ -759,82 +743,30 @@ xfs_inode_item_pushbuf(
         xfs_inode_t     *ip;
         xfs_mount_t     *mp;
         xfs_buf_t       *bp;
-        uint            dopush;
 
         ip = iip->ili_inode;
-
         ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
 
         /*
-         * The ili_pushbuf_flag keeps others from
-         * trying to duplicate our effort.
-         */
-        ASSERT(iip->ili_pushbuf_flag != 0);
-        ASSERT(iip->ili_push_owner == current_pid());
-
-        /*
          * If a flush is not in progress anymore, chances are that the
          * inode was taken off the AIL. So, just get out.
          */
         if (completion_done(&ip->i_flush) ||
             ((iip->ili_item.li_flags & XFS_LI_IN_AIL) == 0)) {
-                iip->ili_pushbuf_flag = 0;
                 xfs_iunlock(ip, XFS_ILOCK_SHARED);
                 return;
         }
 
         mp = ip->i_mount;
         bp = xfs_incore(mp->m_ddev_targp, iip->ili_format.ilf_blkno,
-                    iip->ili_format.ilf_len, XFS_INCORE_TRYLOCK);
+                    iip->ili_format.ilf_len, XBF_TRYLOCK);
 
-        if (bp != NULL) {
-                if (XFS_BUF_ISDELAYWRITE(bp)) {
-                        /*
-                         * We were racing with iflush because we don't hold
-                         * the AIL lock or the flush lock. However, at this point,
-                         * we have the buffer, and we know that it's dirty.
-                         * So, it's possible that iflush raced with us, and
-                         * this item is already taken off the AIL.
-                         * If not, we can flush it async.
-                         */
-                        dopush = ((iip->ili_item.li_flags & XFS_LI_IN_AIL) &&
-                                  !completion_done(&ip->i_flush));
-                        iip->ili_pushbuf_flag = 0;
-                        xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
-                        trace_xfs_inode_item_push(bp, _RET_IP_);
-
-                        if (XFS_BUF_ISPINNED(bp)) {
-                                xfs_log_force(mp, (xfs_lsn_t)0,
-                                              XFS_LOG_FORCE);
-                        }
-                        if (dopush) {
-                                int     error;
-                                error = xfs_bawrite(mp, bp);
-                                if (error)
-                                        xfs_fs_cmn_err(CE_WARN, mp,
-                "xfs_inode_item_pushbuf: pushbuf error %d on iip %p, bp %p",
-                                                        error, iip, bp);
-                        } else {
-                                xfs_buf_relse(bp);
-                        }
-                } else {
-                        iip->ili_pushbuf_flag = 0;
-                        xfs_iunlock(ip, XFS_ILOCK_SHARED);
-                        xfs_buf_relse(bp);
-                }
-                return;
-        }
-        /*
-         * We have to be careful about resetting pushbuf flag too early (above).
-         * Even though in theory we can do it as soon as we have the buflock,
-         * we don't want others to be doing work needlessly. They'll come to
-         * this function thinking that pushing the buffer is their
-         * responsibility only to find that the buffer is still locked by
-         * another doing the same thing
-         */
-        iip->ili_pushbuf_flag = 0;
         xfs_iunlock(ip, XFS_ILOCK_SHARED);
+        if (!bp)
+                return;
+        if (XFS_BUF_ISDELAYWRITE(bp))
+                xfs_buf_delwri_promote(bp);
+        xfs_buf_relse(bp);
         return;
 }
 
@@ -867,10 +799,14 @@ xfs_inode_item_push(
                iip->ili_format.ilf_fields != 0);
 
         /*
-         * Write out the inode.  The completion routine ('iflush_done') will
-         * pull it from the AIL, mark it clean, unlock the flush lock.
+         * Push the inode to it's backing buffer. This will not remove the
+         * inode from the AIL - a further push will be required to trigger a
+         * buffer push. However, this allows all the dirty inodes to be pushed
+         * to the buffer before it is pushed to disk. THe buffer IO completion
+         * will pull th einode from the AIL, mark it clean and unlock the flush
+         * lock.
          */
-        (void) xfs_iflush(ip, XFS_IFLUSH_ASYNC);
+        (void) xfs_iflush(ip, 0);
         xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
         return;
@@ -934,7 +870,6 @@ xfs_inode_item_init(
         /*
            We have zeroed memory. No need ...
            iip->ili_extents_buf = NULL;
-           iip->ili_pushbuf_flag = 0;
          */
 
         iip->ili_format.ilf_type = XFS_LI_INODE;
diff --git a/fs/xfs/xfs_inode_item.h b/fs/xfs/xfs_inode_item.h
index cc8df1ac7783..9a467958ecdd 100644
--- a/fs/xfs/xfs_inode_item.h
+++ b/fs/xfs/xfs_inode_item.h
@@ -144,12 +144,6 @@ typedef struct xfs_inode_log_item {
                                                       data exts */
         struct xfs_bmbt_rec     *ili_aextents_buf; /* array of logged
                                                       attr exts */
-        unsigned int            ili_pushbuf_flag;  /* one bit used in push_ail */
-
-#ifdef DEBUG
-        uint64_t                ili_push_owner;    /* one who sets pushbuf_flag
-                                                      above gets to push the buf */
-#endif
 #ifdef XFS_TRANS_DEBUG
         int                     ili_root_size;
         char                    *ili_orig_root;
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 62efab2f3839..3af02314c605 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -408,8 +408,10 @@ xfs_bulkstat(
                 (XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog);
         nimask = ~(nicluster - 1);
         nbcluster = nicluster >> mp->m_sb.sb_inopblog;
-        irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4,
-                                   KM_SLEEP | KM_MAYFAIL | KM_LARGE);
+        irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
+        if (!irbuf)
+                return ENOMEM;
+
         nirbuf = irbsize / sizeof(*irbuf);
 
         /*
@@ -420,9 +422,7 @@ xfs_bulkstat(
         while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
                 cond_resched();
                 bp = NULL;
-                down_read(&mp->m_peraglock);
                 error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
-                up_read(&mp->m_peraglock);
                 if (error) {
                         /*
                          * Skip this allocation group and go to the next one.
@@ -729,7 +729,7 @@ xfs_bulkstat(
         /*
          * Done, we're either out of filesystem or space to put the data.
          */
-        kmem_free(irbuf);
+        kmem_free_large(irbuf);
         *ubcountp = ubelem;
         /*
          * Found some inodes, return them now and return the error next time.
@@ -849,9 +849,7 @@ xfs_inumbers(
         agbp = NULL;
         while (left > 0 && agno < mp->m_sb.sb_agcount) {
                 if (agbp == NULL) {
-                        down_read(&mp->m_peraglock);
                         error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
-                        up_read(&mp->m_peraglock);
                         if (error) {
                                 /*
                                  * If we can't read the AGI of this ag,
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 600b5b06aaeb..4f16be4b6ee5 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -50,7 +50,6 @@ kmem_zone_t	*xfs_log_ticket_zone;
           (off) += (bytes);}
 
 /* Local miscellaneous function prototypes */
-STATIC int       xlog_bdstrat_cb(struct xfs_buf *);
 STATIC int       xlog_commit_record(xfs_mount_t *mp, xlog_ticket_t *ticket,
                                     xlog_in_core_t **, xfs_lsn_t *);
 STATIC xlog_t *  xlog_alloc_log(xfs_mount_t     *mp,
@@ -80,11 +79,6 @@ STATIC int  xlog_state_release_iclog(xlog_t		*log,
 STATIC void xlog_state_switch_iclogs(xlog_t             *log,
                                      xlog_in_core_t *iclog,
                                      int                eventual_size);
-STATIC int  xlog_state_sync(xlog_t                      *log,
-                            xfs_lsn_t                   lsn,
-                            uint                        flags,
-                            int                         *log_flushed);
-STATIC int  xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed);
 STATIC void xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog);
 
 /* local functions to manipulate grant head */
@@ -297,65 +291,6 @@ xfs_log_done(xfs_mount_t	*mp,
         return lsn;
 }       /* xfs_log_done */
 
-
-/*
- * Force the in-core log to disk.  If flags == XFS_LOG_SYNC,
- *      the force is done synchronously.
- *
- * Asynchronous forces are implemented by setting the WANT_SYNC
- * bit in the appropriate in-core log and then returning.
- *
- * Synchronous forces are implemented with a signal variable. All callers
- * to force a given lsn to disk will wait on a the sv attached to the
- * specific in-core log.  When given in-core log finally completes its
- * write to disk, that thread will wake up all threads waiting on the
- * sv.
- */
-int
-_xfs_log_force(
-        xfs_mount_t     *mp,
-        xfs_lsn_t       lsn,
-        uint            flags,
-        int             *log_flushed)
-{
-        xlog_t          *log = mp->m_log;
-        int             dummy;
-
-        if (!log_flushed)
-                log_flushed = &dummy;
-
-        ASSERT(flags & XFS_LOG_FORCE);
-
-        XFS_STATS_INC(xs_log_force);
-
-        if (log->l_flags & XLOG_IO_ERROR)
-                return XFS_ERROR(EIO);
-        if (lsn == 0)
-                return xlog_state_sync_all(log, flags, log_flushed);
-        else
-                return xlog_state_sync(log, lsn, flags, log_flushed);
-}       /* _xfs_log_force */
-
-/*
- * Wrapper for _xfs_log_force(), to be used when caller doesn't care
- * about errors or whether the log was flushed or not. This is the normal
- * interface to use when trying to unpin items or move the log forward.
- */
-void
-xfs_log_force(
-        xfs_mount_t     *mp,
-        xfs_lsn_t       lsn,
-        uint            flags)
-{
-        int     error;
-        error = _xfs_log_force(mp, lsn, flags, NULL);
-        if (error) {
-                xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "
-                        "error %d returned.", error);
-        }
-}
-
-
 /*
  * Attaches a new iclog I/O completion callback routine during
  * transaction commit.  If the log is in error state, a non-zero
@@ -602,7 +537,7 @@ xfs_log_unmount_write(xfs_mount_t *mp)
         if (mp->m_flags & XFS_MOUNT_RDONLY)
                 return 0;
 
-        error = _xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC, NULL);
+        error = _xfs_log_force(mp, XFS_LOG_SYNC, NULL);
         ASSERT(error || !(XLOG_FORCED_SHUTDOWN(log)));
 
 #ifdef DEBUG
@@ -618,7 +553,7 @@ xfs_log_unmount_write(xfs_mount_t *mp)
         if (! (XLOG_FORCED_SHUTDOWN(log))) {
                 reg[0].i_addr = (void*)&magic;
                 reg[0].i_len  = sizeof(magic);
-                XLOG_VEC_SET_TYPE(&reg[0], XLOG_REG_TYPE_UNMOUNT);
+                reg[0].i_type = XLOG_REG_TYPE_UNMOUNT;
 
                 error = xfs_log_reserve(mp, 600, 1, &tic,
                                         XFS_LOG, 0, XLOG_UNMOUNT_REC_TYPE);
@@ -988,35 +923,6 @@ xlog_iodone(xfs_buf_t *bp)
 }       /* xlog_iodone */
 
 /*
- * The bdstrat callback function for log bufs. This gives us a central
- * place to trap bufs in case we get hit by a log I/O error and need to
- * shutdown. Actually, in practice, even when we didn't get a log error,
- * we transition the iclogs to IOERROR state *after* flushing all existing
- * iclogs to disk. This is because we don't want anymore new transactions to be
- * started or completed afterwards.
- */
-STATIC int
-xlog_bdstrat_cb(struct xfs_buf *bp)
-{
-        xlog_in_core_t *iclog;
-
-        iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *);
-
-        if ((iclog->ic_state & XLOG_STATE_IOERROR) == 0) {
-          /* note for irix bstrat will need  struct bdevsw passed
-           * Fix the following macro if the code ever is merged
-           */
-            XFS_bdstrat(bp);
-                return 0;
-        }
-
-        XFS_BUF_ERROR(bp, EIO);
-        XFS_BUF_STALE(bp);
-        xfs_biodone(bp);
-        return XFS_ERROR(EIO);
-}
-
-/*
  * Return size of each in-core log record buffer.
  *
  * All machines get 8 x 32kB buffers by default, unless tuned otherwise.
@@ -1158,7 +1064,6 @@ xlog_alloc_log(xfs_mount_t	*mp,
         if (!bp)
                 goto out_free_log;
         XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
-        XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
         XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
         ASSERT(XFS_BUF_ISBUSY(bp));
         ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
@@ -1196,7 +1101,6 @@ xlog_alloc_log(xfs_mount_t	*mp,
                 if (!XFS_BUF_CPSEMA(bp))
                         ASSERT(0);
                 XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
-                XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
                 XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
                 iclog->ic_bp = bp;
                 iclog->ic_data = bp->b_addr;
@@ -1268,7 +1172,7 @@ xlog_commit_record(xfs_mount_t  *mp,
 
         reg[0].i_addr = NULL;
         reg[0].i_len = 0;
-        XLOG_VEC_SET_TYPE(&reg[0], XLOG_REG_TYPE_COMMIT);
+        reg[0].i_type = XLOG_REG_TYPE_COMMIT;
 
         ASSERT_ALWAYS(iclog);
         if ((error = xlog_write(mp, reg, 1, ticket, commitlsnp,
@@ -1343,6 +1247,37 @@ xlog_grant_push_ail(xfs_mount_t	*mp,
             xfs_trans_ail_push(log->l_ailp, threshold_lsn);
 }       /* xlog_grant_push_ail */
 
+/*
+ * The bdstrat callback function for log bufs. This gives us a central
+ * place to trap bufs in case we get hit by a log I/O error and need to
+ * shutdown. Actually, in practice, even when we didn't get a log error,
+ * we transition the iclogs to IOERROR state *after* flushing all existing
+ * iclogs to disk. This is because we don't want anymore new transactions to be
+ * started or completed afterwards.
+ */
+STATIC int
+xlog_bdstrat(
+        struct xfs_buf          *bp)
+{
+        struct xlog_in_core     *iclog;
+
+        iclog = XFS_BUF_FSPRIVATE(bp, xlog_in_core_t *);
+        if (iclog->ic_state & XLOG_STATE_IOERROR) {
+                XFS_BUF_ERROR(bp, EIO);
+                XFS_BUF_STALE(bp);
+                xfs_biodone(bp);
+                /*
+                 * It would seem logical to return EIO here, but we rely on
+                 * the log state machine to propagate I/O errors instead of
+                 * doing it here.
+                 */
+                return 0;
+        }
+
+        bp->b_flags |= _XBF_RUN_QUEUES;
+        xfs_buf_iorequest(bp);
+        return 0;
+}
 
 /*
  * Flush out the in-core log (iclog) to the on-disk log in an asynchronous 
@@ -1462,7 +1397,7 @@ xlog_sync(xlog_t		*log,
          */
         XFS_BUF_WRITE(bp);
 
-        if ((error = XFS_bwrite(bp))) {
+        if ((error = xlog_bdstrat(bp))) {
                 xfs_ioerror_alert("xlog_sync", log->l_mp, bp,
                                   XFS_BUF_ADDR(bp));
                 return error;
@@ -1502,7 +1437,7 @@ xlog_sync(xlog_t		*log,
                 /* account for internal log which doesn't start at block #0 */
                 XFS_BUF_SET_ADDR(bp, XFS_BUF_ADDR(bp) + log->l_logBBstart);
                 XFS_BUF_WRITE(bp);
-                if ((error = XFS_bwrite(bp))) {
+                if ((error = xlog_bdstrat(bp))) {
                         xfs_ioerror_alert("xlog_sync (split)", log->l_mp,
                                           bp, XFS_BUF_ADDR(bp));
                         return error;
@@ -2854,7 +2789,6 @@ xlog_state_switch_iclogs(xlog_t		*log,
         log->l_iclog = iclog->ic_next;
 }       /* xlog_state_switch_iclogs */
 
-
 /*
  * Write out all data in the in-core log as of this exact moment in time.
  *
@@ -2882,11 +2816,17 @@ xlog_state_switch_iclogs(xlog_t		*log,
  *         b) when we return from flushing out this iclog, it is still
  *              not in the active nor dirty state.
  */
-STATIC int
-xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed)
+int
+_xfs_log_force(
+        struct xfs_mount        *mp,
+        uint                    flags,
+        int                     *log_flushed)
 {
-        xlog_in_core_t  *iclog;
-        xfs_lsn_t       lsn;
+        struct log              *log = mp->m_log;
+        struct xlog_in_core     *iclog;
+        xfs_lsn_t               lsn;
+
+        XFS_STATS_INC(xs_log_force);
 
         spin_lock(&log->l_icloglock);
 
@@ -2932,7 +2872,9 @@ xlog_state_sync_all(xlog_t *log, uint flags, int *log_flushed)
 
                                 if (xlog_state_release_iclog(log, iclog))
                                         return XFS_ERROR(EIO);
-                                *log_flushed = 1;
+
+                                if (log_flushed)
+                                        *log_flushed = 1;
                                 spin_lock(&log->l_icloglock);
                                 if (be64_to_cpu(iclog->ic_header.h_lsn) == lsn &&
                                     iclog->ic_state != XLOG_STATE_DIRTY)
@@ -2976,19 +2918,37 @@ maybe_sleep:
                  */
                 if (iclog->ic_state & XLOG_STATE_IOERROR)
                         return XFS_ERROR(EIO);
-                *log_flushed = 1;
-
+                if (log_flushed)
+                        *log_flushed = 1;
         } else {
 
 no_sleep:
                 spin_unlock(&log->l_icloglock);
         }
         return 0;
-}       /* xlog_state_sync_all */
+}
 
+/*
+ * Wrapper for _xfs_log_force(), to be used when caller doesn't care
+ * about errors or whether the log was flushed or not. This is the normal
+ * interface to use when trying to unpin items or move the log forward.
+ */
+void
+xfs_log_force(
+        xfs_mount_t     *mp,
+        uint            flags)
+{
+        int     error;
+
+        error = _xfs_log_force(mp, flags, NULL);
+        if (error) {
+                xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "
+                        "error %d returned.", error);
+        }
+}
 
 /*
- * Used by code which implements synchronous log forces.
+ * Force the in-core log to disk for a specific LSN.
  *
  * Find in-core log with lsn.
  *      If it is in the DIRTY state, just return.
@@ -2996,109 +2956,142 @@ no_sleep:
  *              state and go to sleep or return.
  *      If it is in any other state, go to sleep or return.
  *
- * If filesystem activity goes to zero, the iclog will get flushed only by
- * bdflush().
+ * Synchronous forces are implemented with a signal variable. All callers
+ * to force a given lsn to disk will wait on a the sv attached to the
+ * specific in-core log.  When given in-core log finally completes its
+ * write to disk, that thread will wake up all threads waiting on the
+ * sv.
  */
-STATIC int
-xlog_state_sync(xlog_t    *log,
-                xfs_lsn_t lsn,
-                uint      flags,
-                int       *log_flushed)
+int
+_xfs_log_force_lsn(
+        struct xfs_mount        *mp,
+        xfs_lsn_t               lsn,
+        uint                    flags,
+        int                     *log_flushed)
 {
-    xlog_in_core_t      *iclog;
-    int                 already_slept = 0;
+        struct log              *log = mp->m_log;
+        struct xlog_in_core     *iclog;
+        int                     already_slept = 0;
 
-try_again:
-    spin_lock(&log->l_icloglock);
-    iclog = log->l_iclog;
+        ASSERT(lsn != 0);
 
-    if (iclog->ic_state & XLOG_STATE_IOERROR) {
-            spin_unlock(&log->l_icloglock);
-            return XFS_ERROR(EIO);
-    }
-
-    do {
-        if (be64_to_cpu(iclog->ic_header.h_lsn) != lsn) {
-                iclog = iclog->ic_next;
-                continue;
-        }
+        XFS_STATS_INC(xs_log_force);
 
-        if (iclog->ic_state == XLOG_STATE_DIRTY) {
+try_again:
+        spin_lock(&log->l_icloglock);
+        iclog = log->l_iclog;
+        if (iclog->ic_state & XLOG_STATE_IOERROR) {
                 spin_unlock(&log->l_icloglock);
-                return 0;
+                return XFS_ERROR(EIO);
         }
 
-        if (iclog->ic_state == XLOG_STATE_ACTIVE) {
-                /*
-                 * We sleep here if we haven't already slept (e.g.
-                 * this is the first time we've looked at the correct
-                 * iclog buf) and the buffer before us is going to
-                 * be sync'ed. The reason for this is that if we
-                 * are doing sync transactions here, by waiting for
-                 * the previous I/O to complete, we can allow a few
-                 * more transactions into this iclog before we close
-                 * it down.
-                 *
-                 * Otherwise, we mark the buffer WANT_SYNC, and bump
-                 * up the refcnt so we can release the log (which drops
-                 * the ref count).  The state switch keeps new transaction
-                 * commits from using this buffer.  When the current commits
-                 * finish writing into the buffer, the refcount will drop to
-                 * zero and the buffer will go out then.
-                 */
-                if (!already_slept &&
-                    (iclog->ic_prev->ic_state & (XLOG_STATE_WANT_SYNC |
-                                                 XLOG_STATE_SYNCING))) {
-                        ASSERT(!(iclog->ic_state & XLOG_STATE_IOERROR));
-                        XFS_STATS_INC(xs_log_force_sleep);
-                        sv_wait(&iclog->ic_prev->ic_write_wait, PSWP,
-                                &log->l_icloglock, s);
-                        *log_flushed = 1;
-                        already_slept = 1;
-                        goto try_again;
-                } else {
+        do {
+                if (be64_to_cpu(iclog->ic_header.h_lsn) != lsn) {
+                        iclog = iclog->ic_next;
+                        continue;
+                }
+
+                if (iclog->ic_state == XLOG_STATE_DIRTY) {
+                        spin_unlock(&log->l_icloglock);
+                        return 0;
+                }
+
+                if (iclog->ic_state == XLOG_STATE_ACTIVE) {
+                        /*
+                         * We sleep here if we haven't already slept (e.g.
+                         * this is the first time we've looked at the correct
+                         * iclog buf) and the buffer before us is going to
+                         * be sync'ed. The reason for this is that if we
+                         * are doing sync transactions here, by waiting for
+                         * the previous I/O to complete, we can allow a few
+                         * more transactions into this iclog before we close
+                         * it down.
+                         *
+                         * Otherwise, we mark the buffer WANT_SYNC, and bump
+                         * up the refcnt so we can release the log (which
+                         * drops the ref count).  The state switch keeps new
+                         * transaction commits from using this buffer.  When
+                         * the current commits finish writing into the buffer,
+                         * the refcount will drop to zero and the buffer will
+                         * go out then.
+                         */
+                        if (!already_slept &&
+                            (iclog->ic_prev->ic_state &
+                             (XLOG_STATE_WANT_SYNC | XLOG_STATE_SYNCING))) {
+                                ASSERT(!(iclog->ic_state & XLOG_STATE_IOERROR));
+
+                                XFS_STATS_INC(xs_log_force_sleep);
+
+                                sv_wait(&iclog->ic_prev->ic_write_wait,
+                                        PSWP, &log->l_icloglock, s);
+                                if (log_flushed)
+                                        *log_flushed = 1;
+                                already_slept = 1;
+                                goto try_again;
+                        }
                         atomic_inc(&iclog->ic_refcnt);
                         xlog_state_switch_iclogs(log, iclog, 0);
                         spin_unlock(&log->l_icloglock);
                         if (xlog_state_release_iclog(log, iclog))
                                 return XFS_ERROR(EIO);
-                        *log_flushed = 1;
+                        if (log_flushed)
+                                *log_flushed = 1;
                         spin_lock(&log->l_icloglock);
                 }
-        }
 
-        if ((flags & XFS_LOG_SYNC) && /* sleep */
-            !(iclog->ic_state & (XLOG_STATE_ACTIVE | XLOG_STATE_DIRTY))) {
+                if ((flags & XFS_LOG_SYNC) && /* sleep */
+                    !(iclog->ic_state &
+                      (XLOG_STATE_ACTIVE | XLOG_STATE_DIRTY))) {
+                        /*
+                         * Don't wait on completion if we know that we've
+                         * gotten a log write error.
+                         */
+                        if (iclog->ic_state & XLOG_STATE_IOERROR) {
+                                spin_unlock(&log->l_icloglock);
+                                return XFS_ERROR(EIO);
+                        }
+                        XFS_STATS_INC(xs_log_force_sleep);
+                        sv_wait(&iclog->ic_force_wait, PSWP, &log->l_icloglock, s);
+                        /*
+                         * No need to grab the log lock here since we're
+                         * only deciding whether or not to return EIO
+                         * and the memory read should be atomic.
+                         */
+                        if (iclog->ic_state & XLOG_STATE_IOERROR)
+                                return XFS_ERROR(EIO);
 
-                /*
-                 * Don't wait on completion if we know that we've
-                 * gotten a log write error.
-                 */
-                if (iclog->ic_state & XLOG_STATE_IOERROR) {
+                        if (log_flushed)
+                                *log_flushed = 1;
+                } else {                /* just return */
                         spin_unlock(&log->l_icloglock);
-                        return XFS_ERROR(EIO);
                 }
-                XFS_STATS_INC(xs_log_force_sleep);
-                sv_wait(&iclog->ic_force_wait, PSWP, &log->l_icloglock, s);
-                /*
-                 * No need to grab the log lock here since we're
-                 * only deciding whether or not to return EIO
-                 * and the memory read should be atomic.
-                 */
-                if (iclog->ic_state & XLOG_STATE_IOERROR)
-                        return XFS_ERROR(EIO);
-                *log_flushed = 1;
-        } else {                /* just return */
-                spin_unlock(&log->l_icloglock);
-        }
-        return 0;
 
-    } while (iclog != log->l_iclog);
+                return 0;
+        } while (iclog != log->l_iclog);
 
-    spin_unlock(&log->l_icloglock);
-    return 0;
-}       /* xlog_state_sync */
+        spin_unlock(&log->l_icloglock);
+        return 0;
+}
 
+/*
+ * Wrapper for _xfs_log_force_lsn(), to be used when caller doesn't care
+ * about errors or whether the log was flushed or not. This is the normal
+ * interface to use when trying to unpin items or move the log forward.
+ */
+void
+xfs_log_force_lsn(
+        xfs_mount_t     *mp,
+        xfs_lsn_t       lsn,
+        uint            flags)
+{
+        int     error;
+
+        error = _xfs_log_force_lsn(mp, lsn, flags, NULL);
+        if (error) {
+                xfs_fs_cmn_err(CE_WARN, mp, "xfs_log_force: "
+                        "error %d returned.", error);
+        }
+}
 
 /*
  * Called when we want to mark the current iclog as being ready to sync to
@@ -3463,7 +3456,6 @@ xfs_log_force_umount(
         xlog_ticket_t   *tic;
         xlog_t          *log;
         int             retval;
-        int             dummy;
 
         log = mp->m_log;
 
@@ -3537,13 +3529,14 @@ xfs_log_force_umount(
         }
         spin_unlock(&log->l_grant_lock);
 
-        if (! (log->l_iclog->ic_state & XLOG_STATE_IOERROR)) {
+        if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) {
                 ASSERT(!logerror);
                 /*
                  * Force the incore logs to disk before shutting the
                  * log down completely.
                  */
-                xlog_state_sync_all(log, XFS_LOG_FORCE|XFS_LOG_SYNC, &dummy);
+                _xfs_log_force(mp, XFS_LOG_SYNC, NULL);
+
                 spin_lock(&log->l_icloglock);
                 retval = xlog_state_ioerror(log);
                 spin_unlock(&log->l_icloglock);
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index d0c9baa50b1a..7074be9d13e9 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -70,14 +70,8 @@ static inline xfs_lsn_t	_lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
  * Flags to xfs_log_force()
  *
  *      XFS_LOG_SYNC:   Synchronous force in-core log to disk
- *      XFS_LOG_FORCE:  Start in-core log write now.
- *      XFS_LOG_URGE:   Start write within some window of time.
- *
- * Note: Either XFS_LOG_FORCE or XFS_LOG_URGE must be set.
  */
 #define XFS_LOG_SYNC            0x1
-#define XFS_LOG_FORCE           0x2
-#define XFS_LOG_URGE            0x4
 
 #endif  /* __KERNEL__ */
 
@@ -110,10 +104,8 @@ static inline xfs_lsn_t	_lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
 #define XLOG_REG_TYPE_TRANSHDR          19
 #define XLOG_REG_TYPE_MAX               19
 
-#define XLOG_VEC_SET_TYPE(vecp, t) ((vecp)->i_type = (t))
-
 typedef struct xfs_log_iovec {
-        xfs_caddr_t             i_addr;         /* beginning address of region */
+        xfs_caddr_t     i_addr;         /* beginning address of region */
         int             i_len;          /* length in bytes of region */
         uint            i_type;         /* type of region */
 } xfs_log_iovec_t;
@@ -140,12 +132,17 @@ xfs_lsn_t xfs_log_done(struct xfs_mount *mp,
                        void             **iclog,
                        uint             flags);
 int       _xfs_log_force(struct xfs_mount *mp,
-                         xfs_lsn_t      lsn,
                          uint           flags,
                          int            *log_forced);
 void      xfs_log_force(struct xfs_mount        *mp,
-                        xfs_lsn_t               lsn,
                         uint                    flags);
+int       _xfs_log_force_lsn(struct xfs_mount *mp,
+                             xfs_lsn_t          lsn,
+                             uint               flags,
+                             int                *log_forced);
+void      xfs_log_force_lsn(struct xfs_mount    *mp,
+                            xfs_lsn_t           lsn,
+                            uint                flags);
 int       xfs_log_mount(struct xfs_mount        *mp,
                         struct xfs_buftarg      *log_target,
                         xfs_daddr_t             start_block,
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index d55662db7077..fd02a18facd5 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -443,14 +443,9 @@ typedef struct log {
 
 /* common routines */
 extern xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
-extern int       xlog_find_tail(xlog_t  *log,
-                                xfs_daddr_t *head_blk,
-                                xfs_daddr_t *tail_blk);
 extern int       xlog_recover(xlog_t *log);
 extern int       xlog_recover_finish(xlog_t *log);
 extern void      xlog_pack_data(xlog_t *log, xlog_in_core_t *iclog, int);
-extern struct xfs_buf *xlog_get_bp(xlog_t *, int);
-extern void      xlog_put_bp(struct xfs_buf *);
 
 extern kmem_zone_t      *xfs_log_ticket_zone;
 
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 69ac2e5ef20c..22e6efdc17ea 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -50,8 +50,6 @@
 
 STATIC int      xlog_find_zeroed(xlog_t *, xfs_daddr_t *);
 STATIC int      xlog_clear_stale_blocks(xlog_t *, xfs_lsn_t);
-STATIC void     xlog_recover_insert_item_backq(xlog_recover_item_t **q,
-                                               xlog_recover_item_t *item);
 #if defined(DEBUG)
 STATIC void     xlog_recover_check_summary(xlog_t *);
 #else
@@ -68,7 +66,7 @@ STATIC void	xlog_recover_check_summary(xlog_t *);
         ((bbs + (log)->l_sectbb_mask + 1) & ~(log)->l_sectbb_mask) : (bbs) )
 #define XLOG_SECTOR_ROUNDDOWN_BLKNO(log, bno)   ((bno) & ~(log)->l_sectbb_mask)
 
-xfs_buf_t *
+STATIC xfs_buf_t *
 xlog_get_bp(
         xlog_t          *log,
         int             nbblks)
@@ -88,7 +86,7 @@ xlog_get_bp(
         return xfs_buf_get_noaddr(BBTOB(nbblks), log->l_mp->m_logdev_targp);
 }
 
-void
+STATIC void
 xlog_put_bp(
         xfs_buf_t       *bp)
 {
@@ -805,7 +803,7 @@ xlog_find_head(
  * We could speed up search by using current head_blk buffer, but it is not
  * available.
  */
-int
+STATIC int
 xlog_find_tail(
         xlog_t                  *log,
         xfs_daddr_t             *head_blk,
@@ -1367,36 +1365,45 @@ xlog_clear_stale_blocks(
 
 STATIC xlog_recover_t *
 xlog_recover_find_tid(
-        xlog_recover_t          *q,
+        struct hlist_head       *head,
         xlog_tid_t              tid)
 {
-        xlog_recover_t          *p = q;
+        xlog_recover_t          *trans;
+        struct hlist_node       *n;
 
-        while (p != NULL) {
-                if (p->r_log_tid == tid)
-                    break;
-                p = p->r_next;
+        hlist_for_each_entry(trans, n, head, r_list) {
+                if (trans->r_log_tid == tid)
+                        return trans;
         }
-        return p;
+        return NULL;
 }
 
 STATIC void
-xlog_recover_put_hashq(
-        xlog_recover_t          **q,
-        xlog_recover_t          *trans)
+xlog_recover_new_tid(
+        struct hlist_head       *head,
+        xlog_tid_t              tid,
+        xfs_lsn_t               lsn)
 {
-        trans->r_next = *q;
-        *q = trans;
+        xlog_recover_t          *trans;
+
+        trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP);
+        trans->r_log_tid   = tid;
+        trans->r_lsn       = lsn;
+        INIT_LIST_HEAD(&trans->r_itemq);
+
+        INIT_HLIST_NODE(&trans->r_list);
+        hlist_add_head(&trans->r_list, head);
 }
 
 STATIC void
 xlog_recover_add_item(
-        xlog_recover_item_t     **itemq)
+        struct list_head        *head)
 {
         xlog_recover_item_t     *item;
 
         item = kmem_zalloc(sizeof(xlog_recover_item_t), KM_SLEEP);
-        xlog_recover_insert_item_backq(itemq, item);
+        INIT_LIST_HEAD(&item->ri_list);
+        list_add_tail(&item->ri_list, head);
 }
 
 STATIC int
@@ -1409,8 +1416,7 @@ xlog_recover_add_to_cont_trans(
         xfs_caddr_t             ptr, old_ptr;
         int                     old_len;
 
-        item = trans->r_itemq;
-        if (item == NULL) {
+        if (list_empty(&trans->r_itemq)) {
                 /* finish copying rest of trans header */
                 xlog_recover_add_item(&trans->r_itemq);
                 ptr = (xfs_caddr_t) &trans->r_theader +
@@ -1418,7 +1424,8 @@ xlog_recover_add_to_cont_trans(
                 memcpy(ptr, dp, len); /* d, s, l */
                 return 0;
         }
-        item = item->ri_prev;
+        /* take the tail entry */
+        item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list);
 
         old_ptr = item->ri_buf[item->ri_cnt-1].i_addr;
         old_len = item->ri_buf[item->ri_cnt-1].i_len;
@@ -1455,8 +1462,7 @@ xlog_recover_add_to_trans(
 
         if (!len)
                 return 0;
-        item = trans->r_itemq;
-        if (item == NULL) {
+        if (list_empty(&trans->r_itemq)) {
                 /* we need to catch log corruptions here */
                 if (*(uint *)dp != XFS_TRANS_HEADER_MAGIC) {
                         xlog_warn("XFS: xlog_recover_add_to_trans: "
@@ -1474,12 +1480,15 @@ xlog_recover_add_to_trans(
         memcpy(ptr, dp, len);
         in_f = (xfs_inode_log_format_t *)ptr;
 
-        if (item->ri_prev->ri_total != 0 &&
-             item->ri_prev->ri_total == item->ri_prev->ri_cnt) {
+        /* take the tail entry */
+        item = list_entry(trans->r_itemq.prev, xlog_recover_item_t, ri_list);
+        if (item->ri_total != 0 &&
+             item->ri_total == item->ri_cnt) {
+                /* tail item is in use, get a new one */
                 xlog_recover_add_item(&trans->r_itemq);
+                item = list_entry(trans->r_itemq.prev,
+                                        xlog_recover_item_t, ri_list);
         }
-        item = trans->r_itemq;
-        item = item->ri_prev;
 
         if (item->ri_total == 0) {              /* first region to be added */
                 if (in_f->ilf_size == 0 ||
@@ -1504,96 +1513,29 @@ xlog_recover_add_to_trans(
         return 0;
 }
 
-STATIC void
-xlog_recover_new_tid(
-        xlog_recover_t          **q,
-        xlog_tid_t              tid,
-        xfs_lsn_t               lsn)
-{
-        xlog_recover_t          *trans;
-
-        trans = kmem_zalloc(sizeof(xlog_recover_t), KM_SLEEP);
-        trans->r_log_tid   = tid;
-        trans->r_lsn       = lsn;
-        xlog_recover_put_hashq(q, trans);
-}
-
-STATIC int
-xlog_recover_unlink_tid(
-        xlog_recover_t          **q,
-        xlog_recover_t          *trans)
-{
-        xlog_recover_t          *tp;
-        int                     found = 0;
-
-        ASSERT(trans != NULL);
-        if (trans == *q) {
-                *q = (*q)->r_next;
-        } else {
-                tp = *q;
-                while (tp) {
-                        if (tp->r_next == trans) {
-                                found = 1;
-                                break;
-                        }
-                        tp = tp->r_next;
-                }
-                if (!found) {
-                        xlog_warn(
-                             "XFS: xlog_recover_unlink_tid: trans not found");
-                        ASSERT(0);
-                        return XFS_ERROR(EIO);
-                }
-                tp->r_next = tp->r_next->r_next;
-        }
-        return 0;
-}
-
-STATIC void
-xlog_recover_insert_item_backq(
-        xlog_recover_item_t     **q,
-        xlog_recover_item_t     *item)
-{
-        if (*q == NULL) {
-                item->ri_prev = item->ri_next = item;
-                *q = item;
-        } else {
-                item->ri_next           = *q;
-                item->ri_prev           = (*q)->ri_prev;
-                (*q)->ri_prev           = item;
-                item->ri_prev->ri_next  = item;
-        }
-}
-
-STATIC void
-xlog_recover_insert_item_frontq(
-        xlog_recover_item_t     **q,
-        xlog_recover_item_t     *item)
-{
-        xlog_recover_insert_item_backq(q, item);
-        *q = item;
-}
-
+/*
+ * Sort the log items in the transaction. Cancelled buffers need
+ * to be put first so they are processed before any items that might
+ * modify the buffers. If they are cancelled, then the modifications
+ * don't need to be replayed.
+ */
 STATIC int
 xlog_recover_reorder_trans(
         xlog_recover_t          *trans)
 {
-        xlog_recover_item_t     *first_item, *itemq, *itemq_next;
-        xfs_buf_log_format_t    *buf_f;
-        ushort                  flags = 0;
+        xlog_recover_item_t     *item, *n;
+        LIST_HEAD(sort_list);
 
-        first_item = itemq = trans->r_itemq;
-        trans->r_itemq = NULL;
-        do {
-                itemq_next = itemq->ri_next;
-                buf_f = (xfs_buf_log_format_t *)itemq->ri_buf[0].i_addr;
+        list_splice_init(&trans->r_itemq, &sort_list);
+        list_for_each_entry_safe(item, n, &sort_list, ri_list) {
+                xfs_buf_log_format_t    *buf_f;
 
-                switch (ITEM_TYPE(itemq)) {
+                buf_f = (xfs_buf_log_format_t *)item->ri_buf[0].i_addr;
+
+                switch (ITEM_TYPE(item)) {
                 case XFS_LI_BUF:
-                        flags = buf_f->blf_flags;
-                        if (!(flags & XFS_BLI_CANCEL)) {
-                                xlog_recover_insert_item_frontq(&trans->r_itemq,
-                                                                itemq);
+                        if (!(buf_f->blf_flags & XFS_BLI_CANCEL)) {
+                                list_move(&item->ri_list, &trans->r_itemq);
                                 break;
                         }
                 case XFS_LI_INODE:
@@ -1601,7 +1543,7 @@ xlog_recover_reorder_trans(
                 case XFS_LI_QUOTAOFF:
                 case XFS_LI_EFD:
                 case XFS_LI_EFI:
-                        xlog_recover_insert_item_backq(&trans->r_itemq, itemq);
+                        list_move_tail(&item->ri_list, &trans->r_itemq);
                         break;
                 default:
                         xlog_warn(
@@ -1609,8 +1551,8 @@ xlog_recover_reorder_trans(
                         ASSERT(0);
                         return XFS_ERROR(EIO);
                 }
-                itemq = itemq_next;
-        } while (first_item != itemq);
+        }
+        ASSERT(list_empty(&sort_list));
         return 0;
 }
 
@@ -2242,9 +2184,9 @@ xlog_recover_do_buffer_trans(
         }
 
         mp = log->l_mp;
-        buf_flags = XFS_BUF_LOCK;
+        buf_flags = XBF_LOCK;
         if (!(flags & XFS_BLI_INODE_BUF))
-                buf_flags |= XFS_BUF_MAPPED;
+                buf_flags |= XBF_MAPPED;
 
         bp = xfs_buf_read(mp->m_ddev_targp, blkno, len, buf_flags);
         if (XFS_BUF_ISERROR(bp)) {
@@ -2346,7 +2288,7 @@ xlog_recover_do_inode_trans(
         }
 
         bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len,
-                          XFS_BUF_LOCK);
+                          XBF_LOCK);
         if (XFS_BUF_ISERROR(bp)) {
                 xfs_ioerror_alert("xlog_recover_do..(read#2)", mp,
                                   bp, in_f->ilf_blkno);
@@ -2814,14 +2756,13 @@ xlog_recover_do_trans(
         int                     pass)
 {
         int                     error = 0;
-        xlog_recover_item_t     *item, *first_item;
+        xlog_recover_item_t     *item;
 
         error = xlog_recover_reorder_trans(trans);
         if (error)
                 return error;
 
-        first_item = item = trans->r_itemq;
-        do {
+        list_for_each_entry(item, &trans->r_itemq, ri_list) {
                 switch (ITEM_TYPE(item)) {
                 case XFS_LI_BUF:
                         error = xlog_recover_do_buffer_trans(log, item, pass);
@@ -2854,8 +2795,7 @@ xlog_recover_do_trans(
 
                 if (error)
                         return error;
-                item = item->ri_next;
-        } while (first_item != item);
+        }
 
         return 0;
 }
@@ -2869,21 +2809,18 @@ STATIC void
 xlog_recover_free_trans(
         xlog_recover_t          *trans)
 {
-        xlog_recover_item_t     *first_item, *item, *free_item;
+        xlog_recover_item_t     *item, *n;
         int                     i;
 
-        item = first_item = trans->r_itemq;
-        do {
-                free_item = item;
-                item = item->ri_next;
-                 /* Free the regions in the item. */
-                for (i = 0; i < free_item->ri_cnt; i++) {
-                        kmem_free(free_item->ri_buf[i].i_addr);
-                }
+        list_for_each_entry_safe(item, n, &trans->r_itemq, ri_list) {
+                /* Free the regions in the item. */
+                list_del(&item->ri_list);
+                for (i = 0; i < item->ri_cnt; i++)
+                        kmem_free(item->ri_buf[i].i_addr);
                 /* Free the item itself */
-                kmem_free(free_item->ri_buf);
-                kmem_free(free_item);
-        } while (first_item != item);
+                kmem_free(item->ri_buf);
+                kmem_free(item);
+        }
         /* Free the transaction recover structure */
         kmem_free(trans);
 }
@@ -2891,14 +2828,12 @@ xlog_recover_free_trans(
 STATIC int
 xlog_recover_commit_trans(
         xlog_t                  *log,
-        xlog_recover_t          **q,
         xlog_recover_t          *trans,
         int                     pass)
 {
         int                     error;
 
-        if ((error = xlog_recover_unlink_tid(q, trans)))
-                return error;
+        hlist_del(&trans->r_list);
         if ((error = xlog_recover_do_trans(log, trans, pass)))
                 return error;
         xlog_recover_free_trans(trans);                 /* no error */
@@ -2926,7 +2861,7 @@ xlog_recover_unmount_trans(
 STATIC int
 xlog_recover_process_data(
         xlog_t                  *log,
-        xlog_recover_t          *rhash[],
+        struct hlist_head       rhash[],
         xlog_rec_header_t       *rhead,
         xfs_caddr_t             dp,
         int                     pass)
@@ -2960,7 +2895,7 @@ xlog_recover_process_data(
                 }
                 tid = be32_to_cpu(ohead->oh_tid);
                 hash = XLOG_RHASH(tid);
-                trans = xlog_recover_find_tid(rhash[hash], tid);
+                trans = xlog_recover_find_tid(&rhash[hash], tid);
                 if (trans == NULL) {               /* not found; add new tid */
                         if (ohead->oh_flags & XLOG_START_TRANS)
                                 xlog_recover_new_tid(&rhash[hash], tid,
@@ -2978,7 +2913,7 @@ xlog_recover_process_data(
                         switch (flags) {
                         case XLOG_COMMIT_TRANS:
                                 error = xlog_recover_commit_trans(log,
-                                                &rhash[hash], trans, pass);
+                                                                trans, pass);
                                 break;
                         case XLOG_UNMOUNT_TRANS:
                                 error = xlog_recover_unmount_trans(trans);
@@ -3211,7 +3146,7 @@ xlog_recover_process_one_iunlink(
         /*
          * Get the on disk inode to find the next inode in the bucket.
          */
-        error = xfs_itobp(mp, NULL, ip, &dip, &ibp, XFS_BUF_LOCK);
+        error = xfs_itobp(mp, NULL, ip, &dip, &ibp, XBF_LOCK);
         if (error)
                 goto fail_iput;
 
@@ -3517,7 +3452,7 @@ xlog_do_recovery_pass(
         int                     error = 0, h_size;
         int                     bblks, split_bblks;
         int                     hblks, split_hblks, wrapped_hblks;
-        xlog_recover_t          *rhash[XLOG_RHASH_SIZE];
+        struct hlist_head       rhash[XLOG_RHASH_SIZE];
 
         ASSERT(head_blk != tail_blk);
 
@@ -3978,8 +3913,7 @@ xlog_recover_finish(
                  * case the unlink transactions would have problems
                  * pushing the EFIs out of the way.
                  */
-                xfs_log_force(log->l_mp, (xfs_lsn_t)0,
-                              (XFS_LOG_FORCE | XFS_LOG_SYNC));
+                xfs_log_force(log->l_mp, XFS_LOG_SYNC);
 
                 xlog_recover_process_iunlinks(log);
 
diff --git a/fs/xfs/xfs_log_recover.h b/fs/xfs/xfs_log_recover.h
index b22545555301..75d749207258 100644
--- a/fs/xfs/xfs_log_recover.h
+++ b/fs/xfs/xfs_log_recover.h
@@ -35,22 +35,21 @@
  * item headers are in ri_buf[0].  Additional buffers follow.
  */
 typedef struct xlog_recover_item {
-        struct xlog_recover_item *ri_next;
-        struct xlog_recover_item *ri_prev;
-        int                      ri_type;
-        int                      ri_cnt;        /* count of regions found */
-        int                      ri_total;      /* total regions */
-        xfs_log_iovec_t          *ri_buf;       /* ptr to regions buffer */
+        struct list_head        ri_list;
+        int                     ri_type;
+        int                     ri_cnt; /* count of regions found */
+        int                     ri_total;       /* total regions */
+        xfs_log_iovec_t         *ri_buf;        /* ptr to regions buffer */
 } xlog_recover_item_t;
 
 struct xlog_tid;
 typedef struct xlog_recover {
-        struct xlog_recover *r_next;
-        xlog_tid_t          r_log_tid;          /* log's transaction id */
-        xfs_trans_header_t  r_theader;          /* trans header for partial */
-        int                 r_state;            /* not needed */
-        xfs_lsn_t           r_lsn;              /* xact lsn */
-        xlog_recover_item_t *r_itemq;           /* q for items */
+        struct hlist_node       r_list;
+        xlog_tid_t              r_log_tid;      /* log's transaction id */
+        xfs_trans_header_t      r_theader;      /* trans header for partial */
+        int                     r_state;        /* not needed */
+        xfs_lsn_t               r_lsn;          /* xact lsn */
+        struct list_head        r_itemq;        /* q for items */
 } xlog_recover_t;
 
 #define ITEM_TYPE(i)    (*(ushort *)(i)->ri_buf[0].i_addr)
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index eb403b40e120..6afaaeb2950a 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -201,6 +201,38 @@ xfs_uuid_unmount(
 
 
 /*
+ * Reference counting access wrappers to the perag structures.
+ */
+struct xfs_perag *
+xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno)
+{
+        struct xfs_perag        *pag;
+        int                     ref = 0;
+
+        spin_lock(&mp->m_perag_lock);
+        pag = radix_tree_lookup(&mp->m_perag_tree, agno);
+        if (pag) {
+                ASSERT(atomic_read(&pag->pag_ref) >= 0);
+                /* catch leaks in the positive direction during testing */
+                ASSERT(atomic_read(&pag->pag_ref) < 1000);
+                ref = atomic_inc_return(&pag->pag_ref);
+        }
+        spin_unlock(&mp->m_perag_lock);
+        trace_xfs_perag_get(mp, agno, ref, _RET_IP_);
+        return pag;
+}
+
+void
+xfs_perag_put(struct xfs_perag *pag)
+{
+        int     ref;
+
+        ASSERT(atomic_read(&pag->pag_ref) > 0);
+        ref = atomic_dec_return(&pag->pag_ref);
+        trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_);
+}
+
+/*
  * Free up the resources associated with a mount structure.  Assume that
  * the structure was initially zeroed, so we can tell which fields got
  * initialized.
@@ -209,13 +241,16 @@ STATIC void
 xfs_free_perag(
         xfs_mount_t     *mp)
 {
-        if (mp->m_perag) {
-                int     agno;
+        xfs_agnumber_t  agno;
+        struct xfs_perag *pag;
 
-                for (agno = 0; agno < mp->m_maxagi; agno++)
-                        if (mp->m_perag[agno].pagb_list)
-                                kmem_free(mp->m_perag[agno].pagb_list);
-                kmem_free(mp->m_perag);
+        for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
+                spin_lock(&mp->m_perag_lock);
+                pag = radix_tree_delete(&mp->m_perag_tree, agno);
+                ASSERT(pag);
+                ASSERT(atomic_read(&pag->pag_ref) == 0);
+                spin_unlock(&mp->m_perag_lock);
+                kmem_free(pag);
         }
 }
 
@@ -389,22 +424,57 @@ xfs_initialize_perag_icache(
         }
 }
 
-xfs_agnumber_t
+int
 xfs_initialize_perag(
         xfs_mount_t     *mp,
-        xfs_agnumber_t  agcount)
+        xfs_agnumber_t  agcount,
+        xfs_agnumber_t  *maxagi)
 {
         xfs_agnumber_t  index, max_metadata;
+        xfs_agnumber_t  first_initialised = 0;
         xfs_perag_t     *pag;
         xfs_agino_t     agino;
         xfs_ino_t       ino;
         xfs_sb_t        *sbp = &mp->m_sb;
         xfs_ino_t       max_inum = XFS_MAXINUMBER_32;
+        int             error = -ENOMEM;
 
         /* Check to see if the filesystem can overflow 32 bit inodes */
         agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
         ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
 
+        /*
+         * Walk the current per-ag tree so we don't try to initialise AGs
+         * that already exist (growfs case). Allocate and insert all the
+         * AGs we don't find ready for initialisation.
+         */
+        for (index = 0; index < agcount; index++) {
+                pag = xfs_perag_get(mp, index);
+                if (pag) {
+                        xfs_perag_put(pag);
+                        continue;
+                }
+                if (!first_initialised)
+                        first_initialised = index;
+                pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL);
+                if (!pag)
+                        goto out_unwind;
+                if (radix_tree_preload(GFP_NOFS))
+                        goto out_unwind;
+                spin_lock(&mp->m_perag_lock);
+                if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
+                        BUG();
+                        spin_unlock(&mp->m_perag_lock);
+                        radix_tree_preload_end();
+                        error = -EEXIST;
+                        goto out_unwind;
+                }
+                pag->pag_agno = index;
+                pag->pag_mount = mp;
+                spin_unlock(&mp->m_perag_lock);
+                radix_tree_preload_end();
+        }
+
         /* Clear the mount flag if no inode can overflow 32 bits
          * on this filesystem, or if specifically requested..
          */
@@ -438,21 +508,33 @@ xfs_initialize_perag(
                         }
 
                         /* This ag is preferred for inodes */
-                        pag = &mp->m_perag[index];
+                        pag = xfs_perag_get(mp, index);
                         pag->pagi_inodeok = 1;
                         if (index < max_metadata)
                                 pag->pagf_metadata = 1;
                         xfs_initialize_perag_icache(pag);
+                        xfs_perag_put(pag);
                 }
         } else {
                 /* Setup default behavior for smaller filesystems */
                 for (index = 0; index < agcount; index++) {
-                        pag = &mp->m_perag[index];
+                        pag = xfs_perag_get(mp, index);
                         pag->pagi_inodeok = 1;
                         xfs_initialize_perag_icache(pag);
+                        xfs_perag_put(pag);
                 }
         }
-        return index;
+        if (maxagi)
+                *maxagi = index;
+        return 0;
+
+out_unwind:
+        kmem_free(pag);
+        for (; index > first_initialised; index--) {
+                pag = radix_tree_delete(&mp->m_perag_tree, index);
+                kmem_free(pag);
+        }
+        return error;
 }
 
 void
@@ -583,7 +665,7 @@ xfs_readsb(xfs_mount_t *mp, int flags)
          * access to the superblock.
          */
         sector_size = xfs_getsize_buftarg(mp->m_ddev_targp);
-        extra_flags = XFS_BUF_LOCK | XFS_BUF_MANAGE | XFS_BUF_MAPPED;
+        extra_flags = XBF_LOCK | XBF_FS_MANAGED | XBF_MAPPED;
 
         bp = xfs_buf_read(mp->m_ddev_targp, XFS_SB_DADDR, BTOBB(sector_size),
                           extra_flags);
@@ -731,12 +813,13 @@ xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount)
                 error = xfs_ialloc_pagi_init(mp, NULL, index);
                 if (error)
                         return error;
-                pag = &mp->m_perag[index];
+                pag = xfs_perag_get(mp, index);
                 ifree += pag->pagi_freecount;
                 ialloc += pag->pagi_count;
                 bfree += pag->pagf_freeblks;
                 bfreelst += pag->pagf_flcount;
                 btree += pag->pagf_btreeblks;
+                xfs_perag_put(pag);
         }
         /*
          * Overwrite incore superblock counters with just-read data
@@ -1008,6 +1091,22 @@ xfs_mount_reset_sbqflags(
         return xfs_trans_commit(tp, 0);
 }
 
+__uint64_t
+xfs_default_resblks(xfs_mount_t *mp)
+{
+        __uint64_t resblks;
+
+        /*
+         * We default to 5% or 1024 fsbs of space reserved, whichever is smaller.
+         * This may drive us straight to ENOSPC on mount, but that implies
+         * we were already there on the last unmount. Warn if this occurs.
+         */
+        resblks = mp->m_sb.sb_dblocks;
+        do_div(resblks, 20);
+        resblks = min_t(__uint64_t, resblks, 1024);
+        return resblks;
+}
+
 /*
  * This function does the following on an initial mount of a file system:
  *      - reads the superblock from disk and init the mount struct
@@ -1152,13 +1251,13 @@ xfs_mountfs(
         /*
          * Allocate and initialize the per-ag data.
          */
-        init_rwsem(&mp->m_peraglock);
-        mp->m_perag = kmem_zalloc(sbp->sb_agcount * sizeof(xfs_perag_t),
-                                  KM_MAYFAIL);
-        if (!mp->m_perag)
+        spin_lock_init(&mp->m_perag_lock);
+        INIT_RADIX_TREE(&mp->m_perag_tree, GFP_NOFS);
+        error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi);
+        if (error) {
+                cmn_err(CE_WARN, "XFS: Failed per-ag init: %d", error);
                 goto out_remove_uuid;
-
-        mp->m_maxagi = xfs_initialize_perag(mp, sbp->sb_agcount);
+        }
 
         if (!sbp->sb_logblocks) {
                 cmn_err(CE_WARN, "XFS: no log defined");
@@ -1318,18 +1417,14 @@ xfs_mountfs(
          * when at ENOSPC. This is needed for operations like create with
          * attr, unwritten extent conversion at ENOSPC, etc. Data allocations
          * are not allowed to use this reserved space.
-         *
-         * We default to 5% or 1024 fsbs of space reserved, whichever is smaller.
-         * This may drive us straight to ENOSPC on mount, but that implies
-         * we were already there on the last unmount. Warn if this occurs.
          */
-        resblks = mp->m_sb.sb_dblocks;
-        do_div(resblks, 20);
-        resblks = min_t(__uint64_t, resblks, 1024);
-        error = xfs_reserve_blocks(mp, &resblks, NULL);
-        if (error)
-                cmn_err(CE_WARN, "XFS: Unable to allocate reserve blocks. "
-                                "Continuing without a reserve pool.");
+        if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
+                resblks = xfs_default_resblks(mp);
+                error = xfs_reserve_blocks(mp, &resblks, NULL);
+                if (error)
+                        cmn_err(CE_WARN, "XFS: Unable to allocate reserve "
+                                "blocks. Continuing without a reserve pool.");
+        }
 
         return 0;
 
@@ -1372,8 +1467,19 @@ xfs_unmountfs(
          * push out the iclog we will never get that unlocked. hence we
          * need to force the log first.
          */
-        xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
-        xfs_reclaim_inodes(mp, XFS_IFLUSH_ASYNC);
+        xfs_log_force(mp, XFS_LOG_SYNC);
+
+        /*
+         * Do a delwri reclaim pass first so that as many dirty inodes are
+         * queued up for IO as possible. Then flush the buffers before making
+         * a synchronous path to catch all the remaining inodes are reclaimed.
+         * This makes the reclaim process as quick as possible by avoiding
+         * synchronous writeout and blocking on inodes already in the delwri
+         * state as much as possible.
+         */
+        xfs_reclaim_inodes(mp, 0);
+        XFS_bflush(mp->m_ddev_targp);
+        xfs_reclaim_inodes(mp, SYNC_WAIT);
 
         xfs_qm_unmount(mp);
 
@@ -1382,7 +1488,7 @@ xfs_unmountfs(
          * that nothing is pinned.  This is important because bflush()
          * will skip pinned buffers.
          */
-        xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
+        xfs_log_force(mp, XFS_LOG_SYNC);
 
         xfs_binval(mp->m_ddev_targp);
         if (mp->m_rtdev_targp) {
@@ -1548,15 +1654,14 @@ xfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
         xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields);
 
         /* find modified range */
+        f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields);
+        ASSERT((1LL << f) & XFS_SB_MOD_BITS);
+        last = xfs_sb_info[f + 1].offset - 1;
 
         f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
         ASSERT((1LL << f) & XFS_SB_MOD_BITS);
         first = xfs_sb_info[f].offset;
 
-        f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields);
-        ASSERT((1LL << f) & XFS_SB_MOD_BITS);
-        last = xfs_sb_info[f + 1].offset - 1;
-
         xfs_trans_log_buf(tp, bp, first, last);
 }
 
@@ -1887,7 +1992,7 @@ xfs_getsb(
 
         ASSERT(mp->m_sb_bp != NULL);
         bp = mp->m_sb_bp;
-        if (flags & XFS_BUF_TRYLOCK) {
+        if (flags & XBF_TRYLOCK) {
                 if (!XFS_BUF_CPSEMA(bp)) {
                         return NULL;
                 }
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 1df7e4502967..14dafd608230 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -78,7 +78,8 @@ typedef int	(*xfs_send_destroy_t)(struct xfs_inode *, dm_right_t);
 typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *,
                         struct xfs_inode *, dm_right_t,
                         struct xfs_inode *, dm_right_t,
-                        const char *, const char *, mode_t, int, int);
+                        const unsigned char *, const unsigned char *,
+                        mode_t, int, int);
 typedef int     (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t,
                         char *, char *);
 typedef void    (*xfs_send_unmount_t)(struct xfs_mount *, struct xfs_inode *,
@@ -207,8 +208,8 @@ typedef struct xfs_mount {
         uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
         uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
         uint                    m_in_maxlevels; /* max inobt btree levels. */
-        struct xfs_perag        *m_perag;       /* per-ag accounting info */
-        struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
+        struct radix_tree_root  m_perag_tree;   /* per-ag accounting info */
+        spinlock_t              m_perag_lock;   /* lock for m_perag_tree */
         struct mutex            m_growlock;     /* growfs mutex */
         int                     m_fixedfsid[2]; /* unchanged for life of FS */
         uint                    m_dmevmask;     /* DMI events for this FS */
@@ -224,6 +225,7 @@ typedef struct xfs_mount {
         __uint64_t              m_maxioffset;   /* maximum inode offset */
         __uint64_t              m_resblks;      /* total reserved blocks */
         __uint64_t              m_resblks_avail;/* available reserved blocks */
+        __uint64_t              m_resblks_save; /* reserved blks @ remount,ro */
         int                     m_dalign;       /* stripe unit */
         int                     m_swidth;       /* stripe width */
         int                     m_sinoalign;    /* stripe unit inode alignment */
@@ -243,7 +245,7 @@ typedef struct xfs_mount {
         struct xfs_qmops        *m_qm_ops;      /* vector of XQM ops */
         atomic_t                m_active_trans; /* number trans frozen */
 #ifdef HAVE_PERCPU_SB
-        xfs_icsb_cnts_t         *m_sb_cnts;     /* per-cpu superblock counters */
+        xfs_icsb_cnts_t __percpu *m_sb_cnts;    /* per-cpu superblock counters */
         unsigned long           m_icsb_counters; /* disabled per-cpu counters */
         struct notifier_block   m_icsb_notifier; /* hotplug cpu notifier */
         struct mutex            m_icsb_mutex;   /* balancer sync lock */
@@ -384,19 +386,10 @@ xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
 }
 
 /*
- * perag get/put wrappers for eventual ref counting
+ * perag get/put wrappers for ref counting
  */
-static inline xfs_perag_t *
-xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino)
-{
-        return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)];
-}
-
-static inline void
-xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag)
-{
-        /* nothing to see here, move along */
-}
+struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);
+void    xfs_perag_put(struct xfs_perag *pag);
 
 /*
  * Per-cpu superblock locking functions
@@ -428,6 +421,7 @@ typedef struct xfs_mod_sb {
 } xfs_mod_sb_t;
 
 extern int      xfs_log_sbcount(xfs_mount_t *, uint);
+extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
 extern int      xfs_mountfs(xfs_mount_t *mp);
 
 extern void     xfs_unmountfs(xfs_mount_t *);
@@ -450,7 +444,8 @@ extern struct xfs_dmops xfs_dmcore_xfs;
 #endif  /* __KERNEL__ */
 
 extern void     xfs_mod_sb(struct xfs_trans *, __int64_t);
-extern xfs_agnumber_t   xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t);
+extern int      xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
+                                        xfs_agnumber_t *);
 extern void     xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
 extern void     xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 
diff --git a/fs/xfs/xfs_mru_cache.c b/fs/xfs/xfs_mru_cache.c
index 4b0613d99faa..45ce15dc5b2b 100644
--- a/fs/xfs/xfs_mru_cache.c
+++ b/fs/xfs/xfs_mru_cache.c
@@ -398,7 +398,7 @@ exit:
  * guaranteed that all the free functions for all the elements have finished
  * executing and the reaper is not running.
  */
-void
+static void
 xfs_mru_cache_flush(
         xfs_mru_cache_t         *mru)
 {
diff --git a/fs/xfs/xfs_mru_cache.h b/fs/xfs/xfs_mru_cache.h
index 5d439f34b0c9..36dd3ec8b4eb 100644
--- a/fs/xfs/xfs_mru_cache.h
+++ b/fs/xfs/xfs_mru_cache.h
@@ -42,7 +42,6 @@ void xfs_mru_cache_uninit(void);
 int xfs_mru_cache_create(struct xfs_mru_cache **mrup, unsigned int lifetime_ms,
                              unsigned int grp_count,
                              xfs_mru_cache_free_func_t free_func);
-void xfs_mru_cache_flush(xfs_mru_cache_t *mru);
 void xfs_mru_cache_destroy(struct xfs_mru_cache *mru);
 int xfs_mru_cache_insert(struct xfs_mru_cache *mru, unsigned long key,
                                 void *value);
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index 91bfd60f4c74..fdcab3f81dde 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -223,16 +223,9 @@ typedef struct xfs_qoff_logformat {
 #define XFS_QMOPT_RES_INOS      0x0800000
 
 /*
- * flags for dqflush and dqflush_all.
- */
-#define XFS_QMOPT_SYNC          0x1000000
-#define XFS_QMOPT_ASYNC         0x2000000
-#define XFS_QMOPT_DELWRI        0x4000000
-
-/*
  * flags for dqalloc.
  */
-#define XFS_QMOPT_INHERIT       0x8000000
+#define XFS_QMOPT_INHERIT       0x1000000
 
 /*
  * flags to xfs_trans_mod_dquot.
diff --git a/fs/xfs/xfs_rw.c b/fs/xfs/xfs_rw.c
index 5aa07caea5f1..e336742a58a4 100644
--- a/fs/xfs/xfs_rw.c
+++ b/fs/xfs/xfs_rw.c
@@ -47,48 +47,6 @@
 #include "xfs_trace.h"
 
 /*
- * This is a subroutine for xfs_write() and other writers (xfs_ioctl)
- * which clears the setuid and setgid bits when a file is written.
- */
-int
-xfs_write_clear_setuid(
-        xfs_inode_t     *ip)
-{
-        xfs_mount_t     *mp;
-        xfs_trans_t     *tp;
-        int             error;
-
-        mp = ip->i_mount;
-        tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
-        if ((error = xfs_trans_reserve(tp, 0,
-                                      XFS_WRITEID_LOG_RES(mp),
-                                      0, 0, 0))) {
-                xfs_trans_cancel(tp, 0);
-                return error;
-        }
-        xfs_ilock(ip, XFS_ILOCK_EXCL);
-        xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
-        xfs_trans_ihold(tp, ip);
-        ip->i_d.di_mode &= ~S_ISUID;
-
-        /*
-         * Note that we don't have to worry about mandatory
-         * file locking being disabled here because we only
-         * clear the S_ISGID bit if the Group execute bit is
-         * on, but if it was on then mandatory locking wouldn't
-         * have been enabled.
-         */
-        if (ip->i_d.di_mode & S_IXGRP) {
-                ip->i_d.di_mode &= ~S_ISGID;
-        }
-        xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
-        xfs_trans_set_sync(tp);
-        error = xfs_trans_commit(tp, 0);
-        xfs_iunlock(ip, XFS_ILOCK_EXCL);
-        return 0;
-}
-
-/*
  * Force a shutdown of the filesystem instantly while keeping
  * the filesystem consistent. We don't do an unmount here; just shutdown
  * the shop, make sure that absolutely nothing persistent happens to
@@ -153,88 +111,6 @@ xfs_do_force_shutdown(
         }
 }
 
-
-/*
- * Called when we want to stop a buffer from getting written or read.
- * We attach the EIO error, muck with its flags, and call biodone
- * so that the proper iodone callbacks get called.
- */
-int
-xfs_bioerror(
-        xfs_buf_t *bp)
-{
-
-#ifdef XFSERRORDEBUG
-        ASSERT(XFS_BUF_ISREAD(bp) || bp->b_iodone);
-#endif
-
-        /*
-         * No need to wait until the buffer is unpinned.
-         * We aren't flushing it.
-         */
-        XFS_BUF_ERROR(bp, EIO);
-        /*
-         * We're calling biodone, so delete B_DONE flag. Either way
-         * we have to call the iodone callback, and calling biodone
-         * probably is the best way since it takes care of
-         * GRIO as well.
-         */
-        XFS_BUF_UNREAD(bp);
-        XFS_BUF_UNDELAYWRITE(bp);
-        XFS_BUF_UNDONE(bp);
-        XFS_BUF_STALE(bp);
-
-        XFS_BUF_CLR_BDSTRAT_FUNC(bp);
-        xfs_biodone(bp);
-
-        return (EIO);
-}
-
-/*
- * Same as xfs_bioerror, except that we are releasing the buffer
- * here ourselves, and avoiding the biodone call.
- * This is meant for userdata errors; metadata bufs come with
- * iodone functions attached, so that we can track down errors.
- */
-int
-xfs_bioerror_relse(
-        xfs_buf_t *bp)
-{
-        int64_t fl;
-
-        ASSERT(XFS_BUF_IODONE_FUNC(bp) != xfs_buf_iodone_callbacks);
-        ASSERT(XFS_BUF_IODONE_FUNC(bp) != xlog_iodone);
-
-        fl = XFS_BUF_BFLAGS(bp);
-        /*
-         * No need to wait until the buffer is unpinned.
-         * We aren't flushing it.
-         *
-         * chunkhold expects B_DONE to be set, whether
-         * we actually finish the I/O or not. We don't want to
-         * change that interface.
-         */
-        XFS_BUF_UNREAD(bp);
-        XFS_BUF_UNDELAYWRITE(bp);
-        XFS_BUF_DONE(bp);
-        XFS_BUF_STALE(bp);
-        XFS_BUF_CLR_IODONE_FUNC(bp);
-        XFS_BUF_CLR_BDSTRAT_FUNC(bp);
-        if (!(fl & XFS_B_ASYNC)) {
-                /*
-                 * Mark b_error and B_ERROR _both_.
-                 * Lot's of chunkcache code assumes that.
-                 * There's no reason to mark error for
-                 * ASYNC buffers.
-                 */
-                XFS_BUF_ERROR(bp, EIO);
-                XFS_BUF_FINISH_IOWAIT(bp);
-        } else {
-                xfs_buf_relse(bp);
-        }
-        return (EIO);
-}
-
 /*
  * Prints out an ALERT message about I/O error.
  */
@@ -306,37 +182,6 @@ xfs_read_buf(
 }
 
 /*
- * Wrapper around bwrite() so that we can trap
- * write errors, and act accordingly.
- */
-int
-xfs_bwrite(
-        struct xfs_mount *mp,
-        struct xfs_buf   *bp)
-{
-        int     error;
-
-        /*
-         * XXXsup how does this work for quotas.
-         */
-        XFS_BUF_SET_BDSTRAT_FUNC(bp, xfs_bdstrat_cb);
-        bp->b_mount = mp;
-        XFS_BUF_WRITE(bp);
-
-        if ((error = XFS_bwrite(bp))) {
-                ASSERT(mp);
-                /*
-                 * Cannot put a buftrace here since if the buffer is not
-                 * B_HOLD then we will brelse() the buffer before returning
-                 * from bwrite and we could be tracing a buffer that has
-                 * been reused.
-                 */
-                xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR);
-        }
-        return (error);
-}
-
-/*
  * helper function to extract extent size hint from inode
  */
 xfs_extlen_t
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h
index 571f2174435c..11c41ec6ed75 100644
--- a/fs/xfs/xfs_rw.h
+++ b/fs/xfs/xfs_rw.h
@@ -39,10 +39,6 @@ xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
 /*
  * Prototypes for functions in xfs_rw.c.
  */
-extern int xfs_write_clear_setuid(struct xfs_inode *ip);
-extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp);
-extern int xfs_bioerror(struct xfs_buf *bp);
-extern int xfs_bioerror_relse(struct xfs_buf *bp);
 extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp,
                         xfs_daddr_t blkno, int len, uint flags,
                         struct xfs_buf **bpp);
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 237badcbac3b..be942d4e3324 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -981,9 +981,8 @@ shut_us_down:
          */
         if (sync) {
                 if (!error) {
-                        error = _xfs_log_force(mp, commit_lsn,
-                                      XFS_LOG_FORCE | XFS_LOG_SYNC,
-                                      log_flushed);
+                        error = _xfs_log_force_lsn(mp, commit_lsn,
+                                      XFS_LOG_SYNC, log_flushed);
                 }
                 XFS_STATS_INC(xs_trans_sync);
         } else {
@@ -1121,7 +1120,7 @@ xfs_trans_fill_vecs(
         tp->t_header.th_num_items = nitems;
         log_vector->i_addr = (xfs_caddr_t)&tp->t_header;
         log_vector->i_len = sizeof(xfs_trans_header_t);
-        XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_TRANSHDR);
+        log_vector->i_type = XLOG_REG_TYPE_TRANSHDR;
 }
 
 
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index ca64f33c63a3..c93e3a102857 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -861,8 +861,7 @@ typedef struct xfs_item_ops {
 #define XFS_ITEM_SUCCESS        0
 #define XFS_ITEM_PINNED         1
 #define XFS_ITEM_LOCKED         2
-#define XFS_ITEM_FLUSHING       3
-#define XFS_ITEM_PUSHBUF        4
+#define XFS_ITEM_PUSHBUF        3
 
 /*
  * This structure is used to maintain a list of block ranges that have been
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index 2ffc570679be..e799824f7245 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -237,14 +237,15 @@ out:
 }
 
 /*
- * Function that does the work of pushing on the AIL
+ * xfsaild_push does the work of pushing on the AIL.  Returning a timeout of
+ * zero indicates that the caller should sleep until woken.
  */
 long
 xfsaild_push(
         struct xfs_ail  *ailp,
         xfs_lsn_t       *last_lsn)
 {
-        long            tout = 1000; /* milliseconds */
+        long            tout = 0;
         xfs_lsn_t       last_pushed_lsn = *last_lsn;
         xfs_lsn_t       target =  ailp->xa_target;
         xfs_lsn_t       lsn;
@@ -252,6 +253,7 @@ xfsaild_push(
         int             flush_log, count, stuck;
         xfs_mount_t     *mp = ailp->xa_mount;
         struct xfs_ail_cursor   *cur = &ailp->xa_cursors;
+        int             push_xfsbufd = 0;
 
         spin_lock(&ailp->xa_lock);
         xfs_trans_ail_cursor_init(ailp, cur);
@@ -262,7 +264,7 @@ xfsaild_push(
                  */
                 xfs_trans_ail_cursor_done(ailp, cur);
                 spin_unlock(&ailp->xa_lock);
-                last_pushed_lsn = 0;
+                *last_lsn = 0;
                 return tout;
         }
 
@@ -279,7 +281,6 @@ xfsaild_push(
          * prevents use from spinning when we can't do anything or there is
          * lots of contention on the AIL lists.
          */
-        tout = 10;
         lsn = lip->li_lsn;
         flush_log = stuck = count = 0;
         while ((XFS_LSN_CMP(lip->li_lsn, target) < 0)) {
@@ -308,6 +309,7 @@ xfsaild_push(
                         XFS_STATS_INC(xs_push_ail_pushbuf);
                         IOP_PUSHBUF(lip);
                         last_pushed_lsn = lsn;
+                        push_xfsbufd = 1;
                         break;
 
                 case XFS_ITEM_PINNED:
@@ -322,12 +324,6 @@ xfsaild_push(
                         stuck++;
                         break;
 
-                case XFS_ITEM_FLUSHING:
-                        XFS_STATS_INC(xs_push_ail_flushing);
-                        last_pushed_lsn = lsn;
-                        stuck++;
-                        break;
-
                 default:
                         ASSERT(0);
                         break;
@@ -371,19 +367,24 @@ xfsaild_push(
                  * move forward in the AIL.
                  */
                 XFS_STATS_INC(xs_push_ail_flush);
-                xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
+                xfs_log_force(mp, 0);
+        }
+
+        if (push_xfsbufd) {
+                /* we've got delayed write buffers to flush */
+                wake_up_process(mp->m_ddev_targp->bt_task);
         }
 
         if (!count) {
                 /* We're past our target or empty, so idle */
-                tout = 1000;
+                last_pushed_lsn = 0;
         } else if (XFS_LSN_CMP(lsn, target) >= 0) {
                 /*
                  * We reached the target so wait a bit longer for I/O to
                  * complete and remove pushed items from the AIL before we
                  * start the next scan from the start of the AIL.
                  */
-                tout += 20;
+                tout = 50;
                 last_pushed_lsn = 0;
         } else if ((stuck * 100) / count > 90) {
                 /*
@@ -395,11 +396,14 @@ xfsaild_push(
                  * Backoff a bit more to allow some I/O to complete before
                  * continuing from where we were.
                  */
-                tout += 10;
+                tout = 20;
+        } else {
+                /* more to do, but wait a short while before continuing */
+                tout = 10;
         }
         *last_lsn = last_pushed_lsn;
         return tout;
-}       /* xfsaild_push */
+}
 
 
 /*
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 49130628d5ef..5ffd544434eb 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -75,13 +75,14 @@ xfs_trans_get_buf(xfs_trans_t	*tp,
         xfs_buf_log_item_t      *bip;
 
         if (flags == 0)
-                flags = XFS_BUF_LOCK | XFS_BUF_MAPPED;
+                flags = XBF_LOCK | XBF_MAPPED;
 
         /*
          * Default to a normal get_buf() call if the tp is NULL.
          */
         if (tp == NULL)
-                return xfs_buf_get(target_dev, blkno, len, flags | BUF_BUSY);
+                return xfs_buf_get(target_dev, blkno, len,
+                                   flags | XBF_DONT_BLOCK);
 
         /*
          * If we find the buffer in the cache with this transaction
@@ -117,14 +118,14 @@ xfs_trans_get_buf(xfs_trans_t	*tp,
         }
 
         /*
-         * We always specify the BUF_BUSY flag within a transaction so
-         * that get_buf does not try to push out a delayed write buffer
+         * We always specify the XBF_DONT_BLOCK flag within a transaction
+         * so that get_buf does not try to push out a delayed write buffer
          * which might cause another transaction to take place (if the
          * buffer was delayed alloc).  Such recursive transactions can
          * easily deadlock with our current transaction as well as cause
          * us to run out of stack space.
          */
-        bp = xfs_buf_get(target_dev, blkno, len, flags | BUF_BUSY);
+        bp = xfs_buf_get(target_dev, blkno, len, flags | XBF_DONT_BLOCK);
         if (bp == NULL) {
                 return NULL;
         }
@@ -290,15 +291,15 @@ xfs_trans_read_buf(
         int                     error;
 
         if (flags == 0)
-                flags = XFS_BUF_LOCK | XFS_BUF_MAPPED;
+                flags = XBF_LOCK | XBF_MAPPED;
 
         /*
          * Default to a normal get_buf() call if the tp is NULL.
          */
         if (tp == NULL) {
-                bp = xfs_buf_read(target, blkno, len, flags | BUF_BUSY);
+                bp = xfs_buf_read(target, blkno, len, flags | XBF_DONT_BLOCK);
                 if (!bp)
-                        return (flags & XFS_BUF_TRYLOCK) ?
+                        return (flags & XBF_TRYLOCK) ?
                                         EAGAIN : XFS_ERROR(ENOMEM);
 
                 if (XFS_BUF_GETERROR(bp) != 0) {
@@ -385,14 +386,14 @@ xfs_trans_read_buf(
         }
 
         /*
-         * We always specify the BUF_BUSY flag within a transaction so
-         * that get_buf does not try to push out a delayed write buffer
+         * We always specify the XBF_DONT_BLOCK flag within a transaction
+         * so that get_buf does not try to push out a delayed write buffer
          * which might cause another transaction to take place (if the
          * buffer was delayed alloc).  Such recursive transactions can
          * easily deadlock with our current transaction as well as cause
          * us to run out of stack space.
          */
-        bp = xfs_buf_read(target, blkno, len, flags | BUF_BUSY);
+        bp = xfs_buf_read(target, blkno, len, flags | XBF_DONT_BLOCK);
         if (bp == NULL) {
                 *bpp = NULL;
                 return 0;
@@ -472,8 +473,8 @@ shutdown_abort:
         if (XFS_BUF_ISSTALE(bp) && XFS_BUF_ISDELAYWRITE(bp))
                 cmn_err(CE_NOTE, "about to pop assert, bp == 0x%p", bp);
 #endif
-        ASSERT((XFS_BUF_BFLAGS(bp) & (XFS_B_STALE|XFS_B_DELWRI)) !=
-                                                (XFS_B_STALE|XFS_B_DELWRI));
+        ASSERT((XFS_BUF_BFLAGS(bp) & (XBF_STALE|XBF_DELWRI)) !=
+                                     (XBF_STALE|XBF_DELWRI));
 
         trace_xfs_trans_read_buf_shut(bp, _RET_IP_);
         xfs_buf_relse(bp);
diff --git a/fs/xfs/xfs_types.h b/fs/xfs/xfs_types.h
index d725428c9df6..b09904555d07 100644
--- a/fs/xfs/xfs_types.h
+++ b/fs/xfs/xfs_types.h
@@ -151,8 +151,8 @@ typedef enum {
 } xfs_btnum_t;
 
 struct xfs_name {
-        const char      *name;
-        int             len;
+        const unsigned char     *name;
+        int                     len;
 };
 
 #endif  /* __XFS_TYPES_H__ */
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 6f268756bf36..ddd2c5d1b854 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -256,7 +256,7 @@ xfs_setattr(
                     iattr->ia_size > ip->i_d.di_size) {
                         code = xfs_flush_pages(ip,
                                         ip->i_d.di_size, iattr->ia_size,
-                                        XFS_B_ASYNC, FI_NONE);
+                                        XBF_ASYNC, FI_NONE);
                 }
 
                 /* wait for all I/O to complete */
@@ -597,7 +597,7 @@ xfs_fsync(
 {
         xfs_trans_t     *tp;
         int             error = 0;
-        int             log_flushed = 0, changed = 1;
+        int             log_flushed = 0;
 
         xfs_itrace_entry(ip);
 
@@ -627,19 +627,16 @@ xfs_fsync(
                  * disk yet, the inode will be still be pinned.  If it is,
                  * force the log.
                  */
-
                 xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
                 if (xfs_ipincount(ip)) {
-                        error = _xfs_log_force(ip->i_mount, (xfs_lsn_t)0,
-                                      XFS_LOG_FORCE | XFS_LOG_SYNC,
-                                      &log_flushed);
-                } else {
-                        /*
-                         * If the inode is not pinned and nothing has changed
-                         * we don't need to flush the cache.
-                         */
-                        changed = 0;
+                        if (ip->i_itemp->ili_last_lsn) {
+                                error = _xfs_log_force_lsn(ip->i_mount,
+                                                ip->i_itemp->ili_last_lsn,
+                                                XFS_LOG_SYNC, &log_flushed);
+                        } else {
+                                error = _xfs_log_force(ip->i_mount,
+                                                XFS_LOG_SYNC, &log_flushed);
+                        }
                 }
         } else  {
                 /*
@@ -674,7 +671,7 @@ xfs_fsync(
                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
         }
 
-        if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) {
+        if (ip->i_mount->m_flags & XFS_MOUNT_BARRIER) {
                 /*
                  * If the log write didn't issue an ordered tag we need
                  * to flush the disk cache for the data device now.
@@ -1096,7 +1093,7 @@ xfs_release(
                  */
                 truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED);
                 if (truncated && VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0)
-                        xfs_flush_pages(ip, 0, -1, XFS_B_ASYNC, FI_NONE);
+                        xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE);
         }
 
         if (ip->i_d.di_nlink != 0) {
@@ -2199,7 +2196,8 @@ xfs_symlink(
         if (DM_EVENT_ENABLED(dp, DM_EVENT_SYMLINK)) {
                 error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dp,
                                         DM_RIGHT_NULL, NULL, DM_RIGHT_NULL,
-                                        link_name->name, target_path, 0, 0, 0);
+                                        link_name->name,
+                                        (unsigned char *)target_path, 0, 0, 0);
                 if (error)
                         return error;
         }
@@ -2395,7 +2393,8 @@ std_return:
                                         dp, DM_RIGHT_NULL,
                                         error ? NULL : ip,
                                         DM_RIGHT_NULL, link_name->name,
-                                        target_path, 0, error, 0);
+                                        (unsigned char *)target_path,
+                                        0, error, 0);
         }
 
         if (!error)
diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h
index 167a467403a5..774f40729ca1 100644
--- a/fs/xfs/xfs_vnodeops.h
+++ b/fs/xfs/xfs_vnodeops.h
@@ -43,11 +43,11 @@ int xfs_change_file_space(struct xfs_inode *ip, int cmd,
 int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name,
                 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
                 struct xfs_name *target_name, struct xfs_inode *target_ip);
-int xfs_attr_get(struct xfs_inode *ip, const char *name, char *value,
-                int *valuelenp, int flags);
-int xfs_attr_set(struct xfs_inode *dp, const char *name, char *value,
-                int valuelen, int flags);
-int xfs_attr_remove(struct xfs_inode *dp, const char *name, int flags);
+int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
+                unsigned char *value, int *valuelenp, int flags);
+int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
+                unsigned char *value, int valuelen, int flags);
+int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
 int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
                 int flags, struct attrlist_cursor_kern *cursor);
 ssize_t xfs_read(struct xfs_inode *ip, struct kiocb *iocb,