77 files changed, 3440 insertions, 1158 deletions

diff --git a/fs/aio.c b/fs/aio.c
index c30dfc006108..1cf12b3dd83a 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -711,10 +711,8 @@ static ssize_t aio_run_iocb(struct kiocb *iocb)
          */
         ret = retry(iocb);
 
-        if (ret != -EIOCBRETRY && ret != -EIOCBQUEUED) {
-                BUG_ON(!list_empty(&iocb->ki_wait.task_list));
+        if (ret != -EIOCBRETRY && ret != -EIOCBQUEUED)
                 aio_complete(iocb, ret, 0);
-        }
 out:
         spin_lock_irq(&ctx->ctx_lock);
 
@@ -866,13 +864,6 @@ static void try_queue_kicked_iocb(struct kiocb *iocb)
         unsigned long flags;
         int run = 0;
 
-        /* We're supposed to be the only path putting the iocb back on the run
-         * list.  If we find that the iocb is *back* on a wait queue already
-         * than retry has happened before we could queue the iocb.  This also
-         * means that the retry could have completed and freed our iocb, no
-         * good. */
-        BUG_ON((!list_empty(&iocb->ki_wait.task_list)));
-
         spin_lock_irqsave(&ctx->ctx_lock, flags);
         /* set this inside the lock so that we can't race with aio_run_iocb()
          * testing it and putting the iocb on the run list under the lock */
@@ -886,7 +877,7 @@ static void try_queue_kicked_iocb(struct kiocb *iocb)
 /*
  * kick_iocb:
  *      Called typically from a wait queue callback context
- *      (aio_wake_function) to trigger a retry of the iocb.
+ *      to trigger a retry of the iocb.
  *      The retry is usually executed by aio workqueue
  *      threads (See aio_kick_handler).
  */
@@ -1520,31 +1511,6 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb)
         return 0;
 }
 
-/*
- * aio_wake_function:
- *      wait queue callback function for aio notification,
- *      Simply triggers a retry of the operation via kick_iocb.
- *
- *      This callback is specified in the wait queue entry in
- *      a kiocb.
- *
- * Note:
- * This routine is executed with the wait queue lock held.
- * Since kick_iocb acquires iocb->ctx->ctx_lock, it nests
- * the ioctx lock inside the wait queue lock. This is safe
- * because this callback isn't used for wait queues which
- * are nested inside ioctx lock (i.e. ctx->wait)
- */
-static int aio_wake_function(wait_queue_t *wait, unsigned mode,
-                             int sync, void *key)
-{
-        struct kiocb *iocb = container_of(wait, struct kiocb, ki_wait);
-
-        list_del_init(&wait->task_list);
-        kick_iocb(iocb);
-        return 1;
-}
-
 static void aio_batch_add(struct address_space *mapping,
                           struct hlist_head *batch_hash)
 {
@@ -1642,8 +1608,6 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
         req->ki_buf = (char __user *)(unsigned long)iocb->aio_buf;
         req->ki_left = req->ki_nbytes = iocb->aio_nbytes;
         req->ki_opcode = iocb->aio_lio_opcode;
-        init_waitqueue_func_entry(&req->ki_wait, aio_wake_function);
-        INIT_LIST_HEAD(&req->ki_wait.task_list);
 
         ret = aio_setup_iocb(req);
 
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 8f7cdde41733..0118d67221b2 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -60,6 +60,11 @@ 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
@@ -75,6 +80,9 @@ struct autofs_info {
         struct completion expire_complete;
 
         struct list_head active;
+        int active_count;
+        struct list_head rehash_list;
+
         struct list_head expiring;
 
         struct autofs_sb_info *sbi;
@@ -95,6 +103,8 @@ 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;
@@ -161,7 +171,7 @@ static inline int autofs4_ispending(struct dentry *dentry)
 {
         struct autofs_info *inf = autofs4_dentry_ino(dentry);
 
-        if (dentry->d_flags & DCACHE_AUTOFS_PENDING)
+        if (inf->flags & AUTOFS_INF_PENDING)
                 return 1;
 
         if (inf->flags & AUTOFS_INF_EXPIRING)
@@ -264,5 +274,31 @@ out:
         return ret;
 }
 
+static inline void autofs4_add_expiring(struct dentry *dentry)
+{
+        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+        struct autofs_info *ino = autofs4_dentry_ino(dentry);
+        if (ino) {
+                spin_lock(&sbi->lookup_lock);
+                if (list_empty(&ino->expiring))
+                        list_add(&ino->expiring, &sbi->expiring_list);
+                spin_unlock(&sbi->lookup_lock);
+        }
+        return;
+}
+
+static inline void autofs4_del_expiring(struct dentry *dentry)
+{
+        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+        struct autofs_info *ino = autofs4_dentry_ino(dentry);
+        if (ino) {
+                spin_lock(&sbi->lookup_lock);
+                if (!list_empty(&ino->expiring))
+                        list_del_init(&ino->expiring);
+                spin_unlock(&sbi->lookup_lock);
+        }
+        return;
+}
+
 void autofs4_dentry_release(struct dentry *);
 extern void autofs4_kill_sb(struct super_block *);
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 3da18d453488..74bc9aa6df31 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -27,7 +27,7 @@ static inline int autofs4_can_expire(struct dentry *dentry,
                 return 0;
 
         /* No point expiring a pending mount */
-        if (dentry->d_flags & DCACHE_AUTOFS_PENDING)
+        if (ino->flags & AUTOFS_INF_PENDING)
                 return 0;
 
         if (!do_now) {
@@ -279,6 +279,7 @@ 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;
@@ -406,6 +407,7 @@ 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);
@@ -433,7 +435,7 @@ int autofs4_expire_wait(struct dentry *dentry)
 
                 DPRINTK("expire done status=%d", status);
 
-                if (d_unhashed(dentry))
+                if (d_unhashed(dentry) && IS_DEADDIR(dentry->d_inode))
                         return -EAGAIN;
 
                 return status;
@@ -473,6 +475,7 @@ 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);
 
@@ -503,6 +506,7 @@ 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 69c8142da838..d0a3de247458 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -49,6 +49,8 @@ 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);
         }
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index b96a3c57359d..30cc9ddf4b70 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -72,6 +72,139 @@ const struct inode_operations autofs4_dir_inode_operations = {
         .rmdir          = autofs4_dir_rmdir,
 };
 
+static void autofs4_add_active(struct dentry *dentry)
+{
+        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+        struct autofs_info *ino = autofs4_dentry_ino(dentry);
+        if (ino) {
+                spin_lock(&sbi->lookup_lock);
+                if (!ino->active_count) {
+                        if (list_empty(&ino->active))
+                                list_add(&ino->active, &sbi->active_list);
+                }
+                ino->active_count++;
+                spin_unlock(&sbi->lookup_lock);
+        }
+        return;
+}
+
+static void autofs4_del_active(struct dentry *dentry)
+{
+        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+        struct autofs_info *ino = autofs4_dentry_ino(dentry);
+        if (ino) {
+                spin_lock(&sbi->lookup_lock);
+                ino->active_count--;
+                if (!ino->active_count) {
+                        if (!list_empty(&ino->active))
+                                list_del_init(&ino->active);
+                }
+                spin_unlock(&sbi->lookup_lock);
+        }
+        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;
+        if (flags & (TRIGGER_FLAGS | TRIGGER_INTENTS))
+                res = 1;
+        return res;
+}
+
 static int autofs4_dir_open(struct inode *inode, struct file *file)
 {
         struct dentry *dentry = file->f_path.dentry;
@@ -93,7 +226,7 @@ static int autofs4_dir_open(struct inode *inode, struct file *file)
          * it.
          */
         spin_lock(&dcache_lock);
-        if (!d_mountpoint(dentry) && __simple_empty(dentry)) {
+        if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
                 spin_unlock(&dcache_lock);
                 return -ENOENT;
         }
@@ -103,7 +236,7 @@ out:
         return dcache_dir_open(inode, file);
 }
 
-static int try_to_fill_dentry(struct dentry *dentry, int flags)
+static int try_to_fill_dentry(struct dentry *dentry)
 {
         struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
         struct autofs_info *ino = autofs4_dentry_ino(dentry);
@@ -116,55 +249,17 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
          * Wait for a pending mount, triggering one if there
          * isn't one already
          */
-        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);
-
-                DPRINTK("mount done status=%d", status);
-
-                /* Turn this into a real negative dentry? */
-                if (status == -ENOENT) {
-                        spin_lock(&dentry->d_lock);
-                        dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
-                        spin_unlock(&dentry->d_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 (dentry->d_flags & DCACHE_AUTOFS_PENDING ||
-                        flags & (TRIGGER_FLAGS | TRIGGER_INTENTS) ||
-                        current->link_count) {
-                DPRINTK("waiting for mount name=%.*s",
-                        dentry->d_name.len, dentry->d_name.name);
-
-                spin_lock(&dentry->d_lock);
-                dentry->d_flags |= DCACHE_AUTOFS_PENDING;
-                spin_unlock(&dentry->d_lock);
-                status = autofs4_wait(sbi, dentry, NFY_MOUNT);
+        DPRINTK("waiting for mount name=%.*s",
+                 dentry->d_name.len, dentry->d_name.name);
 
-                DPRINTK("mount done status=%d", status);
+        status = autofs4_wait(sbi, dentry, NFY_MOUNT);
 
-                if (status) {
-                        spin_lock(&dentry->d_lock);
-                        dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
-                        spin_unlock(&dentry->d_lock);
-                        return status;
-                }
-        }
-
-        /* Initialize expiry counter after successful mount */
-        if (ino)
-                ino->last_used = jiffies;
+        DPRINTK("mount done status=%d", status);
 
-        spin_lock(&dentry->d_lock);
-        dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
-        spin_unlock(&dentry->d_lock);
+        /* Update expiry counter */
+        ino->last_used = jiffies;
 
-        return 0;
+        return status;
 }
 
 /* For autofs direct mounts the follow link triggers the mount */
@@ -202,27 +297,39 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
         autofs4_expire_wait(dentry);
 
         /* We trigger a mount for almost all flags */
-        lookup_type = nd->flags & (TRIGGER_FLAGS | TRIGGER_INTENTS);
-        if (!(lookup_type || dentry->d_flags & DCACHE_AUTOFS_PENDING))
+        lookup_type = autofs4_need_mount(nd->flags);
+        spin_lock(&sbi->fs_lock);
+        spin_lock(&dcache_lock);
+        if (!(lookup_type || ino->flags & AUTOFS_INF_PENDING)) {
+                spin_unlock(&dcache_lock);
+                spin_unlock(&sbi->fs_lock);
                 goto follow;
+        }
 
         /*
          * If the dentry contains directories then it is an autofs
          * multi-mount with no root mount offset. So don't try to
          * mount it again.
          */
-        spin_lock(&dcache_lock);
-        if (dentry->d_flags & DCACHE_AUTOFS_PENDING ||
-            (!d_mountpoint(dentry) && __simple_empty(dentry))) {
+        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;
 
                 goto follow;
         }
         spin_unlock(&dcache_lock);
+        spin_unlock(&sbi->fs_lock);
 follow:
         /*
          * If there is no root mount it must be an autofs
@@ -254,18 +361,47 @@ 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);
-        int oz_mode = autofs4_oz_mode(sbi);
+        struct autofs_info *ino = autofs4_dentry_ino(dentry);
+        struct rehash_entry *entry;
         int flags = nd ? nd->flags : 0;
-        int status = 1;
+        unsigned int mutex_aquired;
+
+        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);
 
-        /* Pending dentry */
         spin_lock(&sbi->fs_lock);
+        spin_lock(&dcache_lock);
+        /* Pending dentry */
         if (autofs4_ispending(dentry)) {
-                /* The daemon never causes a mount to trigger */
-                spin_unlock(&sbi->fs_lock);
+                int status;
 
-                if (oz_mode)
-                        return 1;
+                /*
+                 * 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);
 
                 /*
                  * If the directory has gone away due to an expire
@@ -279,46 +415,82 @@ 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, flags);
+                status = try_to_fill_dentry(dentry);
+
+                spin_lock(&sbi->fs_lock);
+                ino->flags &= ~AUTOFS_INF_PENDING;
+                spin_unlock(&sbi->fs_lock);
+
                 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) && 
-            __simple_empty(dentry)) {
+            !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);
 
-                /* The daemon never causes a mount to trigger */
-                if (oz_mode)
-                        return 1;
+                if (autofs4_need_mount(flags) || current->link_count) {
+                        int status;
 
-                /*
-                 * A zero status is success otherwise we have a
-                 * negative error code.
-                 */
-                status = try_to_fill_dentry(dentry, flags);
-                if (status == 0)
-                        return 1;
+                        /*
+                         * 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);
 
-                return status;
+                        /*
+                         * 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);
+
+                        if (status == 0)
+                                return 1;
+
+                        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;
@@ -337,6 +509,8 @@ 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);
                 }
 
@@ -359,35 +533,52 @@ static const struct dentry_operations autofs4_dentry_operations = {
         .d_release      = autofs4_dentry_release,
 };
 
-static struct dentry *autofs4_lookup_active(struct autofs_sb_info *sbi, struct dentry *parent, struct qstr *name)
+static struct dentry *autofs4_lookup_active(struct dentry *dentry)
 {
+        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+        struct dentry *parent = dentry->d_parent;
+        struct qstr *name = &dentry->d_name;
         unsigned int len = name->len;
         unsigned int hash = name->hash;
         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;
         list_for_each(p, head) {
                 struct autofs_info *ino;
-                struct dentry *dentry;
+                struct dentry *active;
                 struct qstr *qstr;
 
                 ino = list_entry(p, struct autofs_info, active);
-                dentry = ino->dentry;
+                active = ino->dentry;
 
-                spin_lock(&dentry->d_lock);
+                spin_lock(&active->d_lock);
 
                 /* Already gone? */
-                if (atomic_read(&dentry->d_count) == 0)
+                if (atomic_read(&active->d_count) == 0)
                         goto next;
 
-                qstr = &dentry->d_name;
+                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 (dentry->d_name.hash != hash)
+                if (active->d_name.hash != hash)
                         goto next;
-                if (dentry->d_parent != parent)
+                if (active->d_parent != parent)
                         goto next;
 
                 if (qstr->len != len)
@@ -395,15 +586,13 @@ static struct dentry *autofs4_lookup_active(struct autofs_sb_info *sbi, struct d
                 if (memcmp(qstr->name, str, len))
                         goto next;
 
-                if (d_unhashed(dentry)) {
-                        dget(dentry);
-                        spin_unlock(&dentry->d_lock);
-                        spin_unlock(&sbi->lookup_lock);
-                        spin_unlock(&dcache_lock);
-                        return dentry;
-                }
+                dget(active);
+                spin_unlock(&active->d_lock);
+                spin_unlock(&sbi->lookup_lock);
+                spin_unlock(&dcache_lock);
+                return active;
 next:
-                spin_unlock(&dentry->d_lock);
+                spin_unlock(&active->d_lock);
         }
         spin_unlock(&sbi->lookup_lock);
         spin_unlock(&dcache_lock);
@@ -411,8 +600,11 @@ next:
         return NULL;
 }
 
-static struct dentry *autofs4_lookup_expiring(struct autofs_sb_info *sbi, struct dentry *parent, struct qstr *name)
+static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
 {
+        struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+        struct dentry *parent = dentry->d_parent;
+        struct qstr *name = &dentry->d_name;
         unsigned int len = name->len;
         unsigned int hash = name->hash;
         const unsigned char *str = name->name;
@@ -423,23 +615,23 @@ static struct dentry *autofs4_lookup_expiring(struct autofs_sb_info *sbi, struct
         head = &sbi->expiring_list;
         list_for_each(p, head) {
                 struct autofs_info *ino;
-                struct dentry *dentry;
+                struct dentry *expiring;
                 struct qstr *qstr;
 
                 ino = list_entry(p, struct autofs_info, expiring);
-                dentry = ino->dentry;
+                expiring = ino->dentry;
 
-                spin_lock(&dentry->d_lock);
+                spin_lock(&expiring->d_lock);
 
                 /* Bad luck, we've already been dentry_iput */
-                if (!dentry->d_inode)
+                if (!expiring->d_inode)
                         goto next;
 
-                qstr = &dentry->d_name;
+                qstr = &expiring->d_name;
 
-                if (dentry->d_name.hash != hash)
+                if (expiring->d_name.hash != hash)
                         goto next;
-                if (dentry->d_parent != parent)
+                if (expiring->d_parent != parent)
                         goto next;
 
                 if (qstr->len != len)
@@ -447,15 +639,13 @@ static struct dentry *autofs4_lookup_expiring(struct autofs_sb_info *sbi, struct
                 if (memcmp(qstr->name, str, len))
                         goto next;
 
-                if (d_unhashed(dentry)) {
-                        dget(dentry);
-                        spin_unlock(&dentry->d_lock);
-                        spin_unlock(&sbi->lookup_lock);
-                        spin_unlock(&dcache_lock);
-                        return dentry;
-                }
+                dget(expiring);
+                spin_unlock(&expiring->d_lock);
+                spin_unlock(&sbi->lookup_lock);
+                spin_unlock(&dcache_lock);
+                return expiring;
 next:
-                spin_unlock(&dentry->d_lock);
+                spin_unlock(&expiring->d_lock);
         }
         spin_unlock(&sbi->lookup_lock);
         spin_unlock(&dcache_lock);
@@ -463,13 +653,56 @@ 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)
 {
         struct autofs_sb_info *sbi;
         struct autofs_info *ino;
-        struct dentry *expiring, *unhashed;
+        struct dentry *expiring, *active;
         int oz_mode;
+        int status = 0;
 
         DPRINTK("name = %.*s",
                 dentry->d_name.len, dentry->d_name.name);
@@ -484,123 +717,100 @@ 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);
 
-        unhashed = autofs4_lookup_active(sbi, dentry->d_parent, &dentry->d_name);
-        if (unhashed)
-                dentry = unhashed;
-        else {
-                /*
-                 * 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;
-
-                spin_lock(&sbi->lookup_lock);
-                list_add(&ino->active, &sbi->active_list);
-                spin_unlock(&sbi->lookup_lock);
-
-                d_instantiate(dentry, NULL);
+        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;
         }
 
+        autofs4_add_active(dentry);
+
         if (!oz_mode) {
+                expiring = autofs4_lookup_expiring(dentry);
                 mutex_unlock(&dir->i_mutex);
-                expiring = autofs4_lookup_expiring(sbi,
-                                                   dentry->d_parent,
-                                                   &dentry->d_name);
                 if (expiring) {
                         /*
                          * If we are racing with expire the request might not
                          * be quite complete but the directory has been removed
                          * so it must have been successful, so just wait for it.
                          */
-                        ino = autofs4_dentry_ino(expiring);
                         autofs4_expire_wait(expiring);
-                        spin_lock(&sbi->lookup_lock);
-                        if (!list_empty(&ino->expiring))
-                                list_del_init(&ino->expiring);
-                        spin_unlock(&sbi->lookup_lock);
                         dput(expiring);
                 }
-
-                spin_lock(&dentry->d_lock);
-                dentry->d_flags |= DCACHE_AUTOFS_PENDING;
-                spin_unlock(&dentry->d_lock);
-                if (dentry->d_op && dentry->d_op->d_revalidate)
-                        (dentry->d_op->d_revalidate)(dentry, nd);
+                status = try_to_fill_dentry(dentry);
                 mutex_lock(&dir->i_mutex);
+                spin_lock(&sbi->fs_lock);
+                ino->flags &= ~AUTOFS_INF_PENDING;
+                spin_unlock(&sbi->fs_lock);
         }
 
+        autofs4_del_active(dentry);
+
         /*
-         * If we are still pending, check if we had to handle
+         * If we had a mount fail, check if we had to handle
          * a signal. If so we can force a restart..
          */
-        if (dentry->d_flags & DCACHE_AUTOFS_PENDING) {
+        if (status) {
                 /* See if we were interrupted */
                 if (signal_pending(current)) {
                         sigset_t *sigset = &current->pending.signal;
                         if (sigismember (sigset, SIGKILL) ||
                             sigismember (sigset, SIGQUIT) ||
                             sigismember (sigset, SIGINT)) {
-                            if (unhashed)
-                                dput(unhashed);
+                            if (active)
+                                dput(active);
                             return ERR_PTR(-ERESTARTNOINTR);
                         }
                 }
-                if (!oz_mode) {
-                        spin_lock(&dentry->d_lock);
-                        dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
-                        spin_unlock(&dentry->d_lock);
+        }
+
+        /*
+         * 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 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 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 (!oz_mode && d_unhashed(dentry)) {
+        if (status) {
+                dentry = ERR_PTR(status);
+                if (active)
+                        dput(active);
+                return dentry;
+        } else {
                 /*
-                 * 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.
+                 * Valid successful mount, return active dentry or NULL
+                 * for a new dentry.
                  */
-                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 (unhashed)
-                        dput(unhashed);
-
-                return dentry;
+                if (active)
+                        return active;
         }
 
-        if (unhashed)
-                return unhashed;
-
         return NULL;
 }
 
@@ -624,11 +834,6 @@ static int autofs4_dir_symlink(struct inode *dir,
         if (!ino)
                 return -ENOMEM;
 
-        spin_lock(&sbi->lookup_lock);
-        if (!list_empty(&ino->active))
-                list_del_init(&ino->active);
-        spin_unlock(&sbi->lookup_lock);
-
         ino->size = strlen(symname);
         cp = kmalloc(ino->size + 1, GFP_KERNEL);
         if (!cp) {
@@ -705,10 +910,6 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
         dir->i_mtime = CURRENT_TIME;
 
         spin_lock(&dcache_lock);
-        spin_lock(&sbi->lookup_lock);
-        if (list_empty(&ino->expiring))
-                list_add(&ino->expiring, &sbi->expiring_list);
-        spin_unlock(&sbi->lookup_lock);
         spin_lock(&dentry->d_lock);
         __d_drop(dentry);
         spin_unlock(&dentry->d_lock);
@@ -734,10 +935,6 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
                 spin_unlock(&dcache_lock);
                 return -ENOTEMPTY;
         }
-        spin_lock(&sbi->lookup_lock);
-        if (list_empty(&ino->expiring))
-                list_add(&ino->expiring, &sbi->expiring_list);
-        spin_unlock(&sbi->lookup_lock);
         spin_lock(&dentry->d_lock);
         __d_drop(dentry);
         spin_unlock(&dentry->d_lock);
@@ -775,11 +972,6 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, int mode)
         if (!ino)
                 return -ENOMEM;
 
-        spin_lock(&sbi->lookup_lock);
-        if (!list_empty(&ino->active))
-                list_del_init(&ino->active);
-        spin_unlock(&sbi->lookup_lock);
-
         inode = autofs4_get_inode(dir->i_sb, ino);
         if (!inode) {
                 if (!dentry->d_fsdata)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index d15ea1790bfb..97b6e9efeb7f 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -44,7 +44,7 @@ static unsigned long elf_map(struct file *, unsigned long, struct elf_phdr *,
  * If we don't support core dumping, then supply a NULL so we
  * don't even try.
  */
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
 static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);
 #else
 #define elf_core_dump   NULL
@@ -1101,12 +1101,7 @@ out:
         return error;
 }
 
-/*
- * Note that some platforms still use traditional core dumps and not
- * the ELF core dump.  Each platform can select it as appropriate.
- */
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
-
+#ifdef CONFIG_ELF_CORE
 /*
  * ELF core dumper
  *
@@ -2063,7 +2058,7 @@ out:
         return has_dumped;
 }
 
-#endif          /* USE_ELF_CORE_DUMP */
+#endif          /* CONFIG_ELF_CORE */
 
 static int __init init_elf_binfmt(void)
 {
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 79d2b1aa389f..7b055385db8e 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -75,14 +75,14 @@ static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *,
 static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *,
                                              struct file *, struct mm_struct *);
 
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
 static int elf_fdpic_core_dump(long, struct pt_regs *, struct file *, unsigned long limit);
 #endif
 
 static struct linux_binfmt elf_fdpic_format = {
         .module         = THIS_MODULE,
         .load_binary    = load_elf_fdpic_binary,
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
         .core_dump      = elf_fdpic_core_dump,
 #endif
         .min_coredump   = ELF_EXEC_PAGESIZE,
@@ -1201,7 +1201,7 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
  *
  * Modelled on fs/binfmt_elf.c core dumper
  */
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
 
 /*
  * These are the only things you should do on a core-file: use only these
@@ -1826,4 +1826,4 @@ cleanup:
 #undef NUM_NOTES
 }
 
-#endif          /* USE_ELF_CORE_DUMP */
+#endif          /* CONFIG_ELF_CORE */
diff --git a/fs/cifs/export.c b/fs/cifs/export.c
index 75949d6a5f1b..6177f7cca16a 100644
--- a/fs/cifs/export.c
+++ b/fs/cifs/export.c
@@ -24,7 +24,7 @@
  */
 
  /*
-  * See Documentation/filesystems/Exporting
+  * See Documentation/filesystems/nfs/Exporting
   * and examples in fs/exportfs
   *
   * Since cifs is a network file system, an "fsid" must be included for
diff --git a/fs/compat.c b/fs/compat.c
index 6c19040ffeef..00d90c2e66f0 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -38,8 +38,6 @@
 #include <linux/dirent.h>
 #include <linux/fsnotify.h>
 #include <linux/highuid.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/syscall.h>
 #include <linux/personality.h>
 #include <linux/rwsem.h>
diff --git a/fs/direct-io.c b/fs/direct-io.c
index b912270942fa..4012885d027f 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -53,13 +53,6 @@
  *
  * If blkfactor is zero then the user's request was aligned to the filesystem's
  * blocksize.
- *
- * lock_type is DIO_LOCKING for regular files on direct-IO-naive filesystems.
- * This determines whether we need to do the fancy locking which prevents
- * direct-IO from being able to read uninitialised disk blocks.  If its zero
- * (blockdev) this locking is not done, and if it is DIO_OWN_LOCKING i_mutex is
- * not held for the entire direct write (taken briefly, initially, during a
- * direct read though, but its never held for the duration of a direct-IO).
  */
 
 struct dio {
@@ -68,7 +61,7 @@ struct dio {
         struct inode *inode;
         int rw;
         loff_t i_size;                  /* i_size when submitted */
-        int lock_type;                  /* doesn't change */
+        int flags;                      /* doesn't change */
         unsigned blkbits;               /* doesn't change */
         unsigned blkfactor;             /* When we're using an alignment which
                                            is finer than the filesystem's soft
@@ -104,6 +97,18 @@ struct dio {
         unsigned cur_page_len;          /* Nr of bytes at cur_page_offset */
         sector_t cur_page_block;        /* Where it starts */
 
+        /* BIO completion state */
+        spinlock_t bio_lock;            /* protects BIO fields below */
+        unsigned long refcount;         /* direct_io_worker() and bios */
+        struct bio *bio_list;           /* singly linked via bi_private */
+        struct task_struct *waiter;     /* waiting task (NULL if none) */
+
+        /* AIO related stuff */
+        struct kiocb *iocb;             /* kiocb */
+        int is_async;                   /* is IO async ? */
+        int io_error;                   /* IO error in completion path */
+        ssize_t result;                 /* IO result */
+
         /*
          * Page fetching state. These variables belong to dio_refill_pages().
          */
@@ -115,22 +120,16 @@ struct dio {
          * Page queue.  These variables belong to dio_refill_pages() and
          * dio_get_page().
          */
-        struct page *pages[DIO_PAGES];  /* page buffer */
         unsigned head;                  /* next page to process */
         unsigned tail;                  /* last valid page + 1 */
         int page_errors;                /* errno from get_user_pages() */
 
-        /* BIO completion state */
-        spinlock_t bio_lock;            /* protects BIO fields below */
-        unsigned long refcount;         /* direct_io_worker() and bios */
-        struct bio *bio_list;           /* singly linked via bi_private */
-        struct task_struct *waiter;     /* waiting task (NULL if none) */
-
-        /* AIO related stuff */
-        struct kiocb *iocb;             /* kiocb */
-        int is_async;                   /* is IO async ? */
-        int io_error;                   /* IO error in completion path */
-        ssize_t result;                 /* IO result */
+        /*
+         * pages[] (and any fields placed after it) are not zeroed out at
+         * allocation time.  Don't add new fields after pages[] unless you
+         * wish that they not be zeroed.
+         */
+        struct page *pages[DIO_PAGES];  /* page buffer */
 };
 
 /*
@@ -240,7 +239,8 @@ static int dio_complete(struct dio *dio, loff_t offset, int ret)
         if (dio->end_io && dio->result)
                 dio->end_io(dio->iocb, offset, transferred,
                             dio->map_bh.b_private);
-        if (dio->lock_type == DIO_LOCKING)
+
+        if (dio->flags & DIO_LOCKING)
                 /* lockdep: non-owner release */
                 up_read_non_owner(&dio->inode->i_alloc_sem);
 
@@ -515,21 +515,24 @@ static int get_more_blocks(struct dio *dio)
                 map_bh->b_state = 0;
                 map_bh->b_size = fs_count << dio->inode->i_blkbits;
 
+                /*
+                 * For writes inside i_size on a DIO_SKIP_HOLES filesystem we
+                 * forbid block creations: only overwrites are permitted.
+                 * We will return early to the caller once we see an
+                 * unmapped buffer head returned, and the caller will fall
+                 * back to buffered I/O.
+                 *
+                 * Otherwise the decision is left to the get_blocks method,
+                 * which may decide to handle it or also return an unmapped
+                 * buffer head.
+                 */
                 create = dio->rw & WRITE;
-                if (dio->lock_type == DIO_LOCKING) {
+                if (dio->flags & DIO_SKIP_HOLES) {
                         if (dio->block_in_file < (i_size_read(dio->inode) >>
                                                         dio->blkbits))
                                 create = 0;
-                } else if (dio->lock_type == DIO_NO_LOCKING) {
-                        create = 0;
                 }
 
-                /*
-                 * For writes inside i_size we forbid block creations: only
-                 * overwrites are permitted.  We fall back to buffered writes
-                 * at a higher level for inside-i_size block-instantiating
-                 * writes.
-                 */
                 ret = (*dio->get_block)(dio->inode, fs_startblk,
                                                 map_bh, create);
         }
@@ -1039,7 +1042,7 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
          * we can let i_mutex go now that its achieved its purpose
          * of protecting us from looking up uninitialized blocks.
          */
-        if ((rw == READ) && (dio->lock_type == DIO_LOCKING))
+        if (rw == READ && (dio->flags & DIO_LOCKING))
                 mutex_unlock(&dio->inode->i_mutex);
 
         /*
@@ -1086,30 +1089,28 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
 
 /*
  * This is a library function for use by filesystem drivers.
- * The locking rules are governed by the dio_lock_type parameter.
  *
- * DIO_NO_LOCKING (no locking, for raw block device access)
- * For writes, i_mutex is not held on entry; it is never taken.
+ * The locking rules are governed by the flags parameter:
+ *  - if the flags value contains DIO_LOCKING we use a fancy locking
+ *    scheme for dumb filesystems.
+ *    For writes this function is called under i_mutex and returns with
+ *    i_mutex held, for reads, i_mutex is not held on entry, but it is
+ *    taken and dropped again before returning.
+ *    For reads and writes i_alloc_sem is taken in shared mode and released
+ *    on I/O completion (which may happen asynchronously after returning to
+ *    the caller).
  *
- * DIO_LOCKING (simple locking for regular files)
- * For writes we are called under i_mutex and return with i_mutex held, even
- * though it is internally dropped.
- * For reads, i_mutex is not held on entry, but it is taken and dropped before
- * returning.
- *
- * DIO_OWN_LOCKING (filesystem provides synchronisation and handling of
- *      uninitialised data, allowing parallel direct readers and writers)
- * For writes we are called without i_mutex, return without it, never touch it.
- * For reads we are called under i_mutex and return with i_mutex held, even
- * though it may be internally dropped.
- *
- * Additional i_alloc_sem locking requirements described inline below.
+ *  - if the flags value does NOT contain DIO_LOCKING we don't use any
+ *    internal locking but rather rely on the filesystem to synchronize
+ *    direct I/O reads/writes versus each other and truncate.
+ *    For reads and writes both i_mutex and i_alloc_sem are not held on
+ *    entry and are never taken.
  */
 ssize_t
 __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
         struct block_device *bdev, const struct iovec *iov, loff_t offset, 
         unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
-        int dio_lock_type)
+        int flags)
 {
         int seg;
         size_t size;
@@ -1120,8 +1121,6 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
         ssize_t retval = -EINVAL;
         loff_t end = offset;
         struct dio *dio;
-        int release_i_mutex = 0;
-        int acquire_i_mutex = 0;
 
         if (rw & WRITE)
                 rw = WRITE_ODIRECT_PLUG;
@@ -1151,48 +1150,41 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
                 }
         }
 
-        dio = kzalloc(sizeof(*dio), GFP_KERNEL);
+        dio = kmalloc(sizeof(*dio), GFP_KERNEL);
         retval = -ENOMEM;
         if (!dio)
                 goto out;
-
         /*
-         * For block device access DIO_NO_LOCKING is used,
-         *      neither readers nor writers do any locking at all
-         * For regular files using DIO_LOCKING,
-         *      readers need to grab i_mutex and i_alloc_sem
-         *      writers need to grab i_alloc_sem only (i_mutex is already held)
-         * For regular files using DIO_OWN_LOCKING,
-         *      neither readers nor writers take any locks here
+         * Believe it or not, zeroing out the page array caused a .5%
+         * performance regression in a database benchmark.  So, we take
+         * care to only zero out what's needed.
          */
-        dio->lock_type = dio_lock_type;
-        if (dio_lock_type != DIO_NO_LOCKING) {
+        memset(dio, 0, offsetof(struct dio, pages));
+
+        dio->flags = flags;
+        if (dio->flags & DIO_LOCKING) {
                 /* watch out for a 0 len io from a tricksy fs */
                 if (rw == READ && end > offset) {
-                        struct address_space *mapping;
+                        struct address_space *mapping =
+                                        iocb->ki_filp->f_mapping;
 
-                        mapping = iocb->ki_filp->f_mapping;
-                        if (dio_lock_type != DIO_OWN_LOCKING) {
-                                mutex_lock(&inode->i_mutex);
-                                release_i_mutex = 1;
-                        }
+                        /* will be released by direct_io_worker */
+                        mutex_lock(&inode->i_mutex);
 
                         retval = filemap_write_and_wait_range(mapping, offset,
                                                               end - 1);
                         if (retval) {
+                                mutex_unlock(&inode->i_mutex);
                                 kfree(dio);
                                 goto out;
                         }
-
-                        if (dio_lock_type == DIO_OWN_LOCKING) {
-                                mutex_unlock(&inode->i_mutex);
-                                acquire_i_mutex = 1;
-                        }
                 }
 
-                if (dio_lock_type == DIO_LOCKING)
-                        /* lockdep: not the owner will release it */
-                        down_read_non_owner(&inode->i_alloc_sem);
+                /*
+                 * Will be released at I/O completion, possibly in a
+                 * different thread.
+                 */
+                down_read_non_owner(&inode->i_alloc_sem);
         }
 
         /*
@@ -1210,24 +1202,19 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
         /*
          * In case of error extending write may have instantiated a few
          * blocks outside i_size. Trim these off again for DIO_LOCKING.
-         * NOTE: DIO_NO_LOCK/DIO_OWN_LOCK callers have to handle this by
-         * it's own meaner.
+         *
+         * NOTE: filesystems with their own locking have to handle this
+         * on their own.
          */
-        if (unlikely(retval < 0 && (rw & WRITE))) {
-                loff_t isize = i_size_read(inode);
-
-                if (end > isize && dio_lock_type == DIO_LOCKING)
-                        vmtruncate(inode, isize);
+        if (dio->flags & DIO_LOCKING) {
+                if (unlikely((rw & WRITE) && retval < 0)) {
+                        loff_t isize = i_size_read(inode);
+                        if (end > isize)
+                                vmtruncate(inode, isize);
+                }
         }
 
-        if (rw == READ && dio_lock_type == DIO_LOCKING)
-                release_i_mutex = 0;
-
 out:
-        if (release_i_mutex)
-                mutex_unlock(&inode->i_mutex);
-        else if (acquire_i_mutex)
-                mutex_lock(&inode->i_mutex);
         return retval;
 }
 EXPORT_SYMBOL(__blockdev_direct_IO);
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 197c7db583c7..e9e175949a63 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -6,7 +6,7 @@
  * and for mapping back from file handles to dentries.
  *
  * For details on why we do all the strange and hairy things in here
- * take a look at Documentation/filesystems/Exporting.
+ * take a look at Documentation/filesystems/nfs/Exporting.
  */
 #include <linux/exportfs.h>
 #include <linux/fs.h>
diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index fc2bd05d3559..7516957273ed 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -721,5 +721,5 @@ const struct file_operations ext2_dir_operations = {
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = ext2_compat_ioctl,
 #endif
-        .fsync          = simple_fsync,
+        .fsync          = ext2_fsync,
 };
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index da318b0fa637..061914add3cf 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -155,6 +155,7 @@ extern void ext2_write_super (struct super_block *);
 extern const struct file_operations ext2_dir_operations;
 
 /* file.c */
+extern int ext2_fsync(struct file *file, struct dentry *dentry, int datasync);
 extern const struct inode_operations ext2_file_inode_operations;
 extern const struct file_operations ext2_file_operations;
 extern const struct file_operations ext2_xip_file_operations;
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index a2f3afd1a1c1..586e3589d4c2 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -19,6 +19,7 @@
  */
 
 #include <linux/time.h>
+#include <linux/pagemap.h>
 #include "ext2.h"
 #include "xattr.h"
 #include "acl.h"
@@ -38,6 +39,22 @@ static int ext2_release_file (struct inode * inode, struct file * filp)
         return 0;
 }
 
+int ext2_fsync(struct file *file, struct dentry *dentry, int datasync)
+{
+        int ret;
+        struct super_block *sb = dentry->d_inode->i_sb;
+        struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
+
+        ret = simple_fsync(file, dentry, datasync);
+        if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
+                /* We don't really know where the IO error happened... */
+                ext2_error(sb, __func__,
+                           "detected IO error when writing metadata buffers");
+                ret = -EIO;
+        }
+        return ret;
+}
+
 /*
  * We have mostly NULL's here: the current defaults are ok for
  * the ext2 filesystem.
@@ -55,7 +72,7 @@ const struct file_operations ext2_file_operations = {
         .mmap           = generic_file_mmap,
         .open           = generic_file_open,
         .release        = ext2_release_file,
-        .fsync          = simple_fsync,
+        .fsync          = ext2_fsync,
         .splice_read    = generic_file_splice_read,
         .splice_write   = generic_file_splice_write,
 };
@@ -72,7 +89,7 @@ const struct file_operations ext2_xip_file_operations = {
         .mmap           = xip_file_mmap,
         .open           = generic_file_open,
         .release        = ext2_release_file,
-        .fsync          = simple_fsync,
+        .fsync          = ext2_fsync,
 };
 #endif
 
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 1388802b7803..f9cb54a585ce 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1105,9 +1105,30 @@ failed_sbi:
         return ret;
 }
 
+static void ext2_clear_super_error(struct super_block *sb)
+{
+        struct buffer_head *sbh = EXT2_SB(sb)->s_sbh;
+
+        if (buffer_write_io_error(sbh)) {
+                /*
+                 * Oh, dear.  A previous attempt to write the
+                 * superblock failed.  This could happen because the
+                 * USB device was yanked out.  Or it could happen to
+                 * be a transient write error and maybe the block will
+                 * be remapped.  Nothing we can do but to retry the
+                 * write and hope for the best.
+                 */
+                printk(KERN_ERR "EXT2-fs: %s previous I/O error to "
+                       "superblock detected", sb->s_id);
+                clear_buffer_write_io_error(sbh);
+                set_buffer_uptodate(sbh);
+        }
+}
+
 static void ext2_commit_super (struct super_block * sb,
                                struct ext2_super_block * es)
 {
+        ext2_clear_super_error(sb);
         es->s_wtime = cpu_to_le32(get_seconds());
         mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
         sb->s_dirt = 0;
@@ -1115,6 +1136,7 @@ static void ext2_commit_super (struct super_block * sb,
 
 static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es)
 {
+        ext2_clear_super_error(sb);
         es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));
         es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));
         es->s_wtime = cpu_to_le32(get_seconds());
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 7db0979c6b72..e6efdfa0f6db 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -44,7 +44,8 @@ struct fat_mount_options {
                  nocase:1,        /* Does this need case conversion? 0=need case conversion*/
                  usefree:1,       /* Use free_clusters for FAT32 */
                  tz_utc:1,        /* Filesystem timestamps are in UTC */
-                 rodir:1;         /* allow ATTR_RO for directory */
+                 rodir:1,         /* allow ATTR_RO for directory */
+                 discard:1;       /* Issue discard requests on deletions */
 };
 
 #define FAT_HASH_BITS   8
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index a81037721a6f..81184d3b75a3 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -566,16 +566,21 @@ int fat_free_clusters(struct inode *inode, int cluster)
                         goto error;
                 }
 
-                /* 
-                 * Issue discard for the sectors we no longer care about,
-                 * batching contiguous clusters into one request
-                 */
-                if (cluster != fatent.entry + 1) {
-                        int nr_clus = fatent.entry - first_cl + 1;
-
-                        sb_issue_discard(sb, fat_clus_to_blknr(sbi, first_cl),
-                                         nr_clus * sbi->sec_per_clus);
-                        first_cl = cluster;
+                if (sbi->options.discard) {
+                        /*
+                         * Issue discard for the sectors we no longer
+                         * care about, batching contiguous clusters
+                         * into one request
+                         */
+                        if (cluster != fatent.entry + 1) {
+                                int nr_clus = fatent.entry - first_cl + 1;
+
+                                sb_issue_discard(sb,
+                                        fat_clus_to_blknr(sbi, first_cl),
+                                        nr_clus * sbi->sec_per_clus);
+
+                                first_cl = cluster;
+                        }
                 }
 
                 ops->ent_put(&fatent, FAT_ENT_FREE);
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 76b7961ab663..14da530b05ca 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -858,6 +858,8 @@ static int fat_show_options(struct seq_file *m, struct vfsmount *mnt)
                 seq_puts(m, ",errors=panic");
         else
                 seq_puts(m, ",errors=remount-ro");
+        if (opts->discard)
+                seq_puts(m, ",discard");
 
         return 0;
 }
@@ -871,7 +873,7 @@ enum {
         Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
         Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
         Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err_cont,
-        Opt_err_panic, Opt_err_ro, Opt_err,
+        Opt_err_panic, Opt_err_ro, Opt_discard, Opt_err,
 };
 
 static const match_table_t fat_tokens = {
@@ -899,6 +901,7 @@ static const match_table_t fat_tokens = {
         {Opt_err_cont, "errors=continue"},
         {Opt_err_panic, "errors=panic"},
         {Opt_err_ro, "errors=remount-ro"},
+        {Opt_discard, "discard"},
         {Opt_obsolate, "conv=binary"},
         {Opt_obsolate, "conv=text"},
         {Opt_obsolate, "conv=auto"},
@@ -1136,6 +1139,9 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
                 case Opt_rodir:
                         opts->rodir = 1;
                         break;
+                case Opt_discard:
+                        opts->discard = 1;
+                        break;
 
                 /* obsolete mount options */
                 case Opt_obsolate:
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 0f55f5cb732f..d3da05f26465 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -9,6 +9,7 @@
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
+#include <linux/time.h>
 #include "fat.h"
 
 /*
@@ -157,10 +158,6 @@ extern struct timezone sys_tz;
 #define SECS_PER_MIN    60
 #define SECS_PER_HOUR   (60 * 60)
 #define SECS_PER_DAY    (SECS_PER_HOUR * 24)
-#define UNIX_SECS_1980  315532800L
-#if BITS_PER_LONG == 64
-#define UNIX_SECS_2108  4354819200L
-#endif
 /* days between 1.1.70 and 1.1.80 (2 leap days) */
 #define DAYS_DELTA      (365 * 10 + 2)
 /* 120 (2100 - 1980) isn't leap year */
@@ -213,58 +210,35 @@ void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts,
 void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec *ts,
                        __le16 *time, __le16 *date, u8 *time_cs)
 {
-        time_t second = ts->tv_sec;
-        time_t day, leap_day, month, year;
+        struct tm tm;
+        time_to_tm(ts->tv_sec, sbi->options.tz_utc ? 0 :
+                   -sys_tz.tz_minuteswest * 60, &tm);
 
-        if (!sbi->options.tz_utc)
-                second -= sys_tz.tz_minuteswest * SECS_PER_MIN;
-
-        /* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
-        if (second < UNIX_SECS_1980) {
+        /*  FAT can only support year between 1980 to 2107 */
+        if (tm.tm_year < 1980 - 1900) {
                 *time = 0;
                 *date = cpu_to_le16((0 << 9) | (1 << 5) | 1);
                 if (time_cs)
                         *time_cs = 0;
                 return;
         }
-#if BITS_PER_LONG == 64
-        if (second >= UNIX_SECS_2108) {
+        if (tm.tm_year > 2107 - 1900) {
                 *time = cpu_to_le16((23 << 11) | (59 << 5) | 29);
                 *date = cpu_to_le16((127 << 9) | (12 << 5) | 31);
                 if (time_cs)
                         *time_cs = 199;
                 return;
         }
-#endif
 
-        day = second / SECS_PER_DAY - DAYS_DELTA;
-        year = day / 365;
-        leap_day = (year + 3) / 4;
-        if (year > YEAR_2100)           /* 2100 isn't leap year */
-                leap_day--;
-        if (year * 365 + leap_day > day)
-                year--;
-        leap_day = (year + 3) / 4;
-        if (year > YEAR_2100)           /* 2100 isn't leap year */
-                leap_day--;
-        day -= year * 365 + leap_day;
-
-        if (IS_LEAP_YEAR(year) && day == days_in_year[3]) {
-                month = 2;
-        } else {
-                if (IS_LEAP_YEAR(year) && day > days_in_year[3])
-                        day--;
-                for (month = 1; month < 12; month++) {
-                        if (days_in_year[month + 1] > day)
-                                break;
-                }
-        }
-        day -= days_in_year[month];
+        /* from 1900 -> from 1980 */
+        tm.tm_year -= 80;
+        /* 0~11 -> 1~12 */
+        tm.tm_mon++;
+        /* 0~59 -> 0~29(2sec counts) */
+        tm.tm_sec >>= 1;
 
-        *time = cpu_to_le16(((second / SECS_PER_HOUR) % 24) << 11
-                            | ((second / SECS_PER_MIN) % 60) << 5
-                            | (second % SECS_PER_MIN) >> 1);
-        *date = cpu_to_le16((year << 9) | (month << 5) | (day + 1));
+        *time = cpu_to_le16(tm.tm_hour << 11 | tm.tm_min << 5 | tm.tm_sec);
+        *date = cpu_to_le16(tm.tm_year << 9 | tm.tm_mon << 5 | tm.tm_mday);
         if (time_cs)
                 *time_cs = (ts->tv_sec & 1) * 100 + ts->tv_nsec / 10000000;
 }
@@ -285,4 +259,3 @@ int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs)
         }
         return err;
 }
-
diff --git a/fs/fscache/object-list.c b/fs/fscache/object-list.c
index e590242fa41a..3221a0c7944e 100644
--- a/fs/fscache/object-list.c
+++ b/fs/fscache/object-list.c
@@ -91,7 +91,7 @@ EXPORT_SYMBOL(fscache_object_destroy);
  */
 static struct fscache_object *fscache_objlist_lookup(loff_t *_pos)
 {
-        struct fscache_object *pobj, *obj, *minobj = NULL;
+        struct fscache_object *pobj, *obj = NULL, *minobj = NULL;
         struct rb_node *p;
         unsigned long pos;
 
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2feaa06bf26..cadc4ce48656 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -14,6 +14,7 @@
 #include <linux/magic.h>
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
+#include <linux/bitmap.h>
 
 /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
 
@@ -115,15 +116,13 @@ static void hpfs_put_super(struct super_block *s)
 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
 {
         struct quad_buffer_head qbh;
-        unsigned *bits;
-        unsigned i, count;
-        if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
-        count = 0;
-        for (i = 0; i < 2048 / sizeof(unsigned); i++) {
-                unsigned b; 
-                if (!bits[i]) continue;
-                for (b = bits[i]; b; b>>=1) count += b & 1;
-        }
+        unsigned long *bits;
+        unsigned count;
+
+        bits = hpfs_map_4sectors(s, secno, &qbh, 4);
+        if (!bits)
+                return 0;
+        count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
         hpfs_brelse4(&qbh);
         return count;
 }
diff --git a/fs/isofs/export.c b/fs/isofs/export.c
index e81a30593ba9..ed752cb38474 100644
--- a/fs/isofs/export.c
+++ b/fs/isofs/export.c
@@ -9,7 +9,7 @@
  *
  * The following files are helpful:
  *
- *     Documentation/filesystems/Exporting
+ *     Documentation/filesystems/nfs/Exporting
  *     fs/exportfs/expfs.c.
  */
 
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 090c556ffed2..3b6f2fa12cff 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -700,7 +700,8 @@ static int jffs2_garbage_collect_metadata(struct jffs2_sb_info *c, struct jffs2_
         struct jffs2_raw_inode ri;
         struct jffs2_node_frag *last_frag;
         union jffs2_device_node dev;
-        char *mdata = NULL, mdatalen = 0;
+        char *mdata = NULL;
+        int mdatalen = 0;
         uint32_t alloclen, ilen;
         int ret;
 
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 378991cfe40f..e22de8397b74 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -1284,7 +1284,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
                                 f->target = NULL;
                                 mutex_unlock(&f->sem);
                                 jffs2_do_clear_inode(c, f);
-                                return -ret;
+                                return ret;
                         }
 
                         f->target[je32_to_cpu(latest_node->csize)] = '\0';
diff --git a/fs/jffs2/summary.c b/fs/jffs2/summary.c
index 6caf1e1ee26d..800171dca53b 100644
--- a/fs/jffs2/summary.c
+++ b/fs/jffs2/summary.c
@@ -23,7 +23,7 @@
 
 int jffs2_sum_init(struct jffs2_sb_info *c)
 {
-        uint32_t sum_size = max_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE);
+        uint32_t sum_size = min_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE);
 
         c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
 
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index bd173a6ca3b1..a7966eed3c17 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -11,10 +11,6 @@
 #include <linux/time.h>
 #include <linux/slab.h>
 #include <linux/smp_lock.h>
-#include <linux/in.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/sunrpc/clnt.h>
-#include <linux/nfsd/nfsd.h>
 #include <linux/lockd/lockd.h>
 #include <linux/lockd/share.h>
 
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index e1d28ddd2169..56c9519d900a 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -11,10 +11,6 @@
 #include <linux/time.h>
 #include <linux/slab.h>
 #include <linux/smp_lock.h>
-#include <linux/in.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/sunrpc/clnt.h>
-#include <linux/nfsd/nfsd.h>
 #include <linux/lockd/lockd.h>
 #include <linux/lockd/share.h>
 
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 2a77bc25d5af..59e5673b4597 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -90,7 +90,7 @@ config ROOT_NFS
           If you want your system to mount its root file system via NFS,
           choose Y here.  This is common practice for managing systems
           without local permanent storage.  For details, read
-          <file:Documentation/filesystems/nfsroot.txt>.
+          <file:Documentation/filesystems/nfs/nfsroot.txt>.
 
           Most people say N here.
 
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 7e57b04e4014..865265bdca03 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -108,6 +108,10 @@ enum {
         NFS_OWNER_RECLAIM_NOGRACE
 };
 
+#define NFS_LOCK_NEW            0
+#define NFS_LOCK_RECLAIM        1
+#define NFS_LOCK_EXPIRED        2
+
 /*
  * struct nfs4_state maintains the client-side state for a given
  * (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
@@ -282,6 +286,7 @@ extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter);
 extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
 extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
 extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
+extern void nfs_release_seqid(struct nfs_seqid *seqid);
 extern void nfs_free_seqid(struct nfs_seqid *seqid);
 
 extern const nfs4_stateid zero_stateid;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 9f5f11ecfd93..198d51d17c13 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -64,6 +64,7 @@
 
 struct nfs4_opendata;
 static int _nfs4_proc_open(struct nfs4_opendata *data);
+static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
@@ -341,6 +342,27 @@ nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
                 free_slotid, tbl->highest_used_slotid);
 }
 
+/*
+ * Signal state manager thread if session is drained
+ */
+static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
+{
+        struct rpc_task *task;
+
+        if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
+                task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
+                if (task)
+                        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
+                return;
+        }
+
+        if (ses->fc_slot_table.highest_used_slotid != -1)
+                return;
+
+        dprintk("%s COMPLETE: Session Drained\n", __func__);
+        complete(&ses->complete);
+}
+
 static void nfs41_sequence_free_slot(const struct nfs_client *clp,
                               struct nfs4_sequence_res *res)
 {
@@ -356,15 +378,7 @@ static void nfs41_sequence_free_slot(const struct nfs_client *clp,
 
         spin_lock(&tbl->slot_tbl_lock);
         nfs4_free_slot(tbl, res->sr_slotid);
-
-        /* Signal state manager thread if session is drained */
-        if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
-                if (tbl->highest_used_slotid == -1) {
-                        dprintk("%s COMPLETE: Session Drained\n", __func__);
-                        complete(&clp->cl_session->complete);
-                }
-        } else
-                rpc_wake_up_next(&tbl->slot_tbl_waitq);
+        nfs41_check_drain_session_complete(clp->cl_session);
         spin_unlock(&tbl->slot_tbl_lock);
         res->sr_slotid = NFS4_MAX_SLOT_TABLE;
 }
@@ -421,7 +435,7 @@ out:
  * Note: must be called with under the slot_tbl_lock.
  */
 static u8
-nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
+nfs4_find_slot(struct nfs4_slot_table *tbl)
 {
         int slotid;
         u8 ret_id = NFS4_MAX_SLOT_TABLE;
@@ -463,7 +477,8 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
         tbl = &session->fc_slot_table;
 
         spin_lock(&tbl->slot_tbl_lock);
-        if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
+        if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
+            !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
                 /*
                  * The state manager will wait until the slot table is empty.
                  * Schedule the reset thread
@@ -474,7 +489,15 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
                 return -EAGAIN;
         }
 
-        slotid = nfs4_find_slot(tbl, task);
+        if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
+            !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
+                rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
+                spin_unlock(&tbl->slot_tbl_lock);
+                dprintk("%s enforce FIFO order\n", __func__);
+                return -EAGAIN;
+        }
+
+        slotid = nfs4_find_slot(tbl);
         if (slotid == NFS4_MAX_SLOT_TABLE) {
                 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
                 spin_unlock(&tbl->slot_tbl_lock);
@@ -483,6 +506,7 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
         }
         spin_unlock(&tbl->slot_tbl_lock);
 
+        rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
         slot = tbl->slots + slotid;
         args->sa_session = session;
         args->sa_slotid = slotid;
@@ -545,6 +569,12 @@ static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
         rpc_call_start(task);
 }
 
+static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
+{
+        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
+        nfs41_call_sync_prepare(task, calldata);
+}
+
 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
 {
         struct nfs41_call_sync_data *data = calldata;
@@ -557,12 +587,18 @@ struct rpc_call_ops nfs41_call_sync_ops = {
         .rpc_call_done = nfs41_call_sync_done,
 };
 
+struct rpc_call_ops nfs41_call_priv_sync_ops = {
+        .rpc_call_prepare = nfs41_call_priv_sync_prepare,
+        .rpc_call_done = nfs41_call_sync_done,
+};
+
 static int nfs4_call_sync_sequence(struct nfs_client *clp,
                                    struct rpc_clnt *clnt,
                                    struct rpc_message *msg,
                                    struct nfs4_sequence_args *args,
                                    struct nfs4_sequence_res *res,
-                                   int cache_reply)
+                                   int cache_reply,
+                                   int privileged)
 {
         int ret;
         struct rpc_task *task;
@@ -580,6 +616,8 @@ static int nfs4_call_sync_sequence(struct nfs_client *clp,
         };
 
         res->sr_slotid = NFS4_MAX_SLOT_TABLE;
+        if (privileged)
+                task_setup.callback_ops = &nfs41_call_priv_sync_ops;
         task = rpc_run_task(&task_setup);
         if (IS_ERR(task))
                 ret = PTR_ERR(task);
@@ -597,7 +635,7 @@ int _nfs4_call_sync_session(struct nfs_server *server,
                             int cache_reply)
 {
         return nfs4_call_sync_sequence(server->nfs_client, server->client,
-                                       msg, args, res, cache_reply);
+                                       msg, args, res, cache_reply, 0);
 }
 
 #endif /* CONFIG_NFS_V4_1 */
@@ -1035,7 +1073,7 @@ static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmod
         memset(&opendata->o_res, 0, sizeof(opendata->o_res));
         memset(&opendata->c_res, 0, sizeof(opendata->c_res));
         nfs4_init_opendata_res(opendata);
-        ret = _nfs4_proc_open(opendata);
+        ret = _nfs4_recover_proc_open(opendata);
         if (ret != 0)
                 return ret; 
         newstate = nfs4_opendata_to_nfs4_state(opendata);
@@ -1326,6 +1364,12 @@ out_no_action:
 
 }
 
+static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
+{
+        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
+        nfs4_open_prepare(task, calldata);
+}
+
 static void nfs4_open_done(struct rpc_task *task, void *calldata)
 {
         struct nfs4_opendata *data = calldata;
@@ -1384,10 +1428,13 @@ static const struct rpc_call_ops nfs4_open_ops = {
         .rpc_release = nfs4_open_release,
 };
 
-/*
- * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
- */
-static int _nfs4_proc_open(struct nfs4_opendata *data)
+static const struct rpc_call_ops nfs4_recover_open_ops = {
+        .rpc_call_prepare = nfs4_recover_open_prepare,
+        .rpc_call_done = nfs4_open_done,
+        .rpc_release = nfs4_open_release,
+};
+
+static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
 {
         struct inode *dir = data->dir->d_inode;
         struct nfs_server *server = NFS_SERVER(dir);
@@ -1414,21 +1461,57 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
         data->rpc_done = 0;
         data->rpc_status = 0;
         data->cancelled = 0;
+        if (isrecover)
+                task_setup_data.callback_ops = &nfs4_recover_open_ops;
         task = rpc_run_task(&task_setup_data);
-        if (IS_ERR(task))
-                return PTR_ERR(task);
-        status = nfs4_wait_for_completion_rpc_task(task);
-        if (status != 0) {
-                data->cancelled = 1;
-                smp_wmb();
-        } else
-                status = data->rpc_status;
-        rpc_put_task(task);
+        if (IS_ERR(task))
+                return PTR_ERR(task);
+        status = nfs4_wait_for_completion_rpc_task(task);
+        if (status != 0) {
+                data->cancelled = 1;
+                smp_wmb();
+        } else
+                status = data->rpc_status;
+        rpc_put_task(task);
+
+        return status;
+}
+
+static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
+{
+        struct inode *dir = data->dir->d_inode;
+        struct nfs_openres *o_res = &data->o_res;
+        int status;
+
+        status = nfs4_run_open_task(data, 1);
         if (status != 0 || !data->rpc_done)
                 return status;
 
-        if (o_res->fh.size == 0)
-                _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
+        nfs_refresh_inode(dir, o_res->dir_attr);
+
+        if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
+                status = _nfs4_proc_open_confirm(data);
+                if (status != 0)
+                        return status;
+        }
+
+        return status;
+}
+
+/*
+ * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
+ */
+static int _nfs4_proc_open(struct nfs4_opendata *data)
+{
+        struct inode *dir = data->dir->d_inode;
+        struct nfs_server *server = NFS_SERVER(dir);
+        struct nfs_openargs *o_arg = &data->o_arg;
+        struct nfs_openres *o_res = &data->o_res;
+        int status;
+
+        status = nfs4_run_open_task(data, 0);
+        if (status != 0 || !data->rpc_done)
+                return status;
 
         if (o_arg->open_flags & O_CREAT) {
                 update_changeattr(dir, &o_res->cinfo);
@@ -1752,11 +1835,10 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
                         if (calldata->arg.fmode == 0)
                                 break;
                 default:
-                        if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
-                                nfs_restart_rpc(task, server->nfs_client);
-                                return;
-                        }
+                        if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
+                                rpc_restart_call_prepare(task);
         }
+        nfs_release_seqid(calldata->arg.seqid);
         nfs_refresh_inode(calldata->inode, calldata->res.fattr);
 }
 
@@ -1848,8 +1930,6 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
         calldata->state = state;
         calldata->arg.fh = NFS_FH(state->inode);
         calldata->arg.stateid = &state->open_stateid;
-        if (nfs4_has_session(server->nfs_client))
-                memset(calldata->arg.stateid->data, 0, 4);    /* clear seqid */
         /* Serialization for the sequence id */
         calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
         if (calldata->arg.seqid == NULL)
@@ -3941,6 +4021,12 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
         dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
 }
 
+static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
+{
+        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
+        nfs4_lock_prepare(task, calldata);
+}
+
 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
 {
         struct nfs4_lockdata *data = calldata;
@@ -3996,7 +4082,13 @@ static const struct rpc_call_ops nfs4_lock_ops = {
         .rpc_release = nfs4_lock_release,
 };
 
-static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
+static const struct rpc_call_ops nfs4_recover_lock_ops = {
+        .rpc_call_prepare = nfs4_recover_lock_prepare,
+        .rpc_call_done = nfs4_lock_done,
+        .rpc_release = nfs4_lock_release,
+};
+
+static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
 {
         struct nfs4_lockdata *data;
         struct rpc_task *task;
@@ -4020,8 +4112,11 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f
                 return -ENOMEM;
         if (IS_SETLKW(cmd))
                 data->arg.block = 1;
-        if (reclaim != 0)
-                data->arg.reclaim = 1;
+        if (recovery_type > NFS_LOCK_NEW) {
+                if (recovery_type == NFS_LOCK_RECLAIM)
+                        data->arg.reclaim = NFS_LOCK_RECLAIM;
+                task_setup_data.callback_ops = &nfs4_recover_lock_ops;
+        }
         msg.rpc_argp = &data->arg,
         msg.rpc_resp = &data->res,
         task_setup_data.callback_data = data;
@@ -4048,7 +4143,7 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request
                 /* Cache the lock if possible... */
                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
                         return 0;
-                err = _nfs4_do_setlk(state, F_SETLK, request, 1);
+                err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
                 if (err != -NFS4ERR_DELAY)
                         break;
                 nfs4_handle_exception(server, err, &exception);
@@ -4068,7 +4163,7 @@ static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request
         do {
                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
                         return 0;
-                err = _nfs4_do_setlk(state, F_SETLK, request, 0);
+                err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
                 switch (err) {
                 default:
                         goto out;
@@ -4104,7 +4199,7 @@ static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock
                 status = do_vfs_lock(request->fl_file, request);
                 goto out_unlock;
         }
-        status = _nfs4_do_setlk(state, cmd, request, 0);
+        status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
         if (status != 0)
                 goto out_unlock;
         /* Note: we always want to sleep here! */
@@ -4187,7 +4282,7 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
         if (err != 0)
                 goto out;
         do {
-                err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
+                err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
                 switch (err) {
                         default:
                                 printk(KERN_ERR "%s: unhandled error %d.\n",
@@ -4395,11 +4490,12 @@ static void nfs4_get_lease_time_prepare(struct rpc_task *task,
                         (struct nfs4_get_lease_time_data *)calldata;
 
         dprintk("--> %s\n", __func__);
+        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
         /* just setup sequence, do not trigger session recovery
            since we're invoked within one */
         ret = nfs41_setup_sequence(data->clp->cl_session,
-                                        &data->args->la_seq_args,
-                                        &data->res->lr_seq_res, 0, task);
+                                   &data->args->la_seq_args,
+                                   &data->res->lr_seq_res, 0, task);
 
         BUG_ON(ret == -EAGAIN);
         rpc_call_start(task);
@@ -4619,7 +4715,7 @@ struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
         tbl = &session->fc_slot_table;
         tbl->highest_used_slotid = -1;
         spin_lock_init(&tbl->slot_tbl_lock);
-        rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
+        rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
 
         tbl = &session->bc_slot_table;
         tbl->highest_used_slotid = -1;
@@ -4838,14 +4934,22 @@ int nfs4_init_session(struct nfs_server *server)
 {
         struct nfs_client *clp = server->nfs_client;
         struct nfs4_session *session;
+        unsigned int rsize, wsize;
         int ret;
 
         if (!nfs4_has_session(clp))
                 return 0;
 
+        rsize = server->rsize;
+        if (rsize == 0)
+                rsize = NFS_MAX_FILE_IO_SIZE;
+        wsize = server->wsize;
+        if (wsize == 0)
+                wsize = NFS_MAX_FILE_IO_SIZE;
+
         session = clp->cl_session;
-        session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
-        session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
+        session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
+        session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
 
         ret = nfs4_recover_expired_lease(server);
         if (!ret)
@@ -4871,7 +4975,7 @@ static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
         args.sa_cache_this = 0;
 
         return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
-                                       &res, 0);
+                                       &res, args.sa_cache_this, 1);
 }
 
 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
@@ -4953,6 +5057,7 @@ static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
 {
         struct nfs4_reclaim_complete_data *calldata = data;
 
+        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
         if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
                                 &calldata->res.seq_res, 0, task))
                 return;
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index e76427e6346f..6d263ed79e92 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -135,16 +135,30 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp)
         return status;
 }
 
-static void nfs41_end_drain_session(struct nfs_client *clp,
-                struct nfs4_session *ses)
+static void nfs4_end_drain_session(struct nfs_client *clp)
 {
-        if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state))
-                rpc_wake_up(&ses->fc_slot_table.slot_tbl_waitq);
+        struct nfs4_session *ses = clp->cl_session;
+        int max_slots;
+
+        if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
+                spin_lock(&ses->fc_slot_table.slot_tbl_lock);
+                max_slots = ses->fc_slot_table.max_slots;
+                while (max_slots--) {
+                        struct rpc_task *task;
+
+                        task = rpc_wake_up_next(&ses->fc_slot_table.
+                                                slot_tbl_waitq);
+                        if (!task)
+                                break;
+                        rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
+                }
+                spin_unlock(&ses->fc_slot_table.slot_tbl_lock);
+        }
 }
 
-static int nfs41_begin_drain_session(struct nfs_client *clp,
-                struct nfs4_session *ses)
+static int nfs4_begin_drain_session(struct nfs_client *clp)
 {
+        struct nfs4_session *ses = clp->cl_session;
         struct nfs4_slot_table *tbl = &ses->fc_slot_table;
 
         spin_lock(&tbl->slot_tbl_lock);
@@ -162,16 +176,13 @@ int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
 {
         int status;
 
-        status = nfs41_begin_drain_session(clp, clp->cl_session);
-        if (status != 0)
-                goto out;
+        nfs4_begin_drain_session(clp);
         status = nfs4_proc_exchange_id(clp, cred);
         if (status != 0)
                 goto out;
         status = nfs4_proc_create_session(clp);
         if (status != 0)
                 goto out;
-        nfs41_end_drain_session(clp, clp->cl_session);
         nfs41_setup_state_renewal(clp);
         nfs_mark_client_ready(clp, NFS_CS_READY);
 out:
@@ -755,16 +766,21 @@ struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter)
         return new;
 }
 
-void nfs_free_seqid(struct nfs_seqid *seqid)
+void nfs_release_seqid(struct nfs_seqid *seqid)
 {
         if (!list_empty(&seqid->list)) {
                 struct rpc_sequence *sequence = seqid->sequence->sequence;
 
                 spin_lock(&sequence->lock);
-                list_del(&seqid->list);
+                list_del_init(&seqid->list);
                 spin_unlock(&sequence->lock);
                 rpc_wake_up(&sequence->wait);
         }
+}
+
+void nfs_free_seqid(struct nfs_seqid *seqid)
+{
+        nfs_release_seqid(seqid);
         kfree(seqid);
 }
 
@@ -1257,13 +1273,9 @@ void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
 
 static int nfs4_reset_session(struct nfs_client *clp)
 {
-        struct nfs4_session *ses = clp->cl_session;
         int status;
 
-        status = nfs41_begin_drain_session(clp, ses);
-        if (status != 0)
-                return status;
-
+        nfs4_begin_drain_session(clp);
         status = nfs4_proc_destroy_session(clp->cl_session);
         if (status && status != -NFS4ERR_BADSESSION &&
             status != -NFS4ERR_DEADSESSION) {
@@ -1279,19 +1291,17 @@ static int nfs4_reset_session(struct nfs_client *clp)
 out:
         /*
          * Let the state manager reestablish state
-         * without waking other tasks yet.
          */
-        if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
-                /* Wake up the next rpc task */
-                nfs41_end_drain_session(clp, ses);
-                if (status == 0)
-                        nfs41_setup_state_renewal(clp);
-        }
+        if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
+            status == 0)
+                nfs41_setup_state_renewal(clp);
+
         return status;
 }
 
 #else /* CONFIG_NFS_V4_1 */
 static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
+static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; }
 #endif /* CONFIG_NFS_V4_1 */
 
 /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors
@@ -1382,6 +1392,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
                                 goto out_error;
                 }
 
+                nfs4_end_drain_session(clp);
                 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
                         nfs_client_return_marked_delegations(clp);
                         continue;
@@ -1398,6 +1409,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
 out_error:
         printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
                         " with error %d\n", clp->cl_hostname, -status);
+        nfs4_end_drain_session(clp);
         nfs4_clear_state_manager_bit(clp);
 }
 
diff --git a/fs/nfsctl.c b/fs/nfsctl.c
index 8f9a20556f79..d3854d94b7cf 100644
--- a/fs/nfsctl.c
+++ b/fs/nfsctl.c
@@ -7,8 +7,6 @@
 #include <linux/types.h>
 #include <linux/file.h>
 #include <linux/fs.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/syscall.h>
 #include <linux/cred.h>
 #include <linux/sched.h>
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index 36fcabbf5186..79717a40daba 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -1,15 +1,7 @@
-/*
- * linux/fs/nfsd/auth.c
- *
- * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
- */
+/* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> */
 
-#include <linux/types.h>
 #include <linux/sched.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/sunrpc/svcauth.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/export.h>
+#include "nfsd.h"
 #include "auth.h"
 
 int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp)
diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h
new file mode 100644
index 000000000000..d892be61016c
--- /dev/null
+++ b/fs/nfsd/cache.h
@@ -0,0 +1,83 @@
+/*
+ * Request reply cache. This was heavily inspired by the
+ * implementation in 4.3BSD/4.4BSD.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef NFSCACHE_H
+#define NFSCACHE_H
+
+#include <linux/sunrpc/svc.h>
+
+/*
+ * Representation of a reply cache entry.
+ */
+struct svc_cacherep {
+        struct hlist_node       c_hash;
+        struct list_head        c_lru;
+
+        unsigned char           c_state,        /* unused, inprog, done */
+                                c_type,         /* status, buffer */
+                                c_secure : 1;   /* req came from port < 1024 */
+        struct sockaddr_in      c_addr;
+        __be32                  c_xid;
+        u32                     c_prot;
+        u32                     c_proc;
+        u32                     c_vers;
+        unsigned long           c_timestamp;
+        union {
+                struct kvec     u_vec;
+                __be32          u_status;
+        }                       c_u;
+};
+
+#define c_replvec               c_u.u_vec
+#define c_replstat              c_u.u_status
+
+/* cache entry states */
+enum {
+        RC_UNUSED,
+        RC_INPROG,
+        RC_DONE
+};
+
+/* return values */
+enum {
+        RC_DROPIT,
+        RC_REPLY,
+        RC_DOIT,
+        RC_INTR
+};
+
+/*
+ * Cache types.
+ * We may want to add more types one day, e.g. for diropres and
+ * attrstat replies. Using cache entries with fixed length instead
+ * of buffer pointers may be more efficient.
+ */
+enum {
+        RC_NOCACHE,
+        RC_REPLSTAT,
+        RC_REPLBUFF,
+};
+
+/*
+ * If requests are retransmitted within this interval, they're dropped.
+ */
+#define RC_DELAY                (HZ/5)
+
+int     nfsd_reply_cache_init(void);
+void    nfsd_reply_cache_shutdown(void);
+int     nfsd_cache_lookup(struct svc_rqst *, int);
+void    nfsd_cache_update(struct svc_rqst *, int, __be32 *);
+
+#ifdef CONFIG_NFSD_V4
+void    nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp);
+#else  /* CONFIG_NFSD_V4 */
+static inline void nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp)
+{
+}
+#endif /* CONFIG_NFSD_V4 */
+
+#endif /* NFSCACHE_H */
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index c1c9e035d4a4..c487810a2366 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1,7 +1,5 @@
 #define MSNFS   /* HACK HACK */
 /*
- * linux/fs/nfsd/export.c
- *
  * NFS exporting and validation.
  *
  * We maintain a list of clients, each of which has a list of
@@ -14,29 +12,16 @@
  * Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de>
  */
 
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/in.h>
-#include <linux/seq_file.h>
-#include <linux/syscalls.h>
-#include <linux/rwsem.h>
-#include <linux/dcache.h>
 #include <linux/namei.h>
-#include <linux/mount.h>
-#include <linux/hash.h>
 #include <linux/module.h>
 #include <linux/exportfs.h>
 
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/nfsfh.h>
 #include <linux/nfsd/syscall.h>
-#include <linux/lockd/bind.h>
-#include <linux/sunrpc/msg_prot.h>
-#include <linux/sunrpc/gss_api.h>
 #include <net/ipv6.h>
 
+#include "nfsd.h"
+#include "nfsfh.h"
+
 #define NFSDDBG_FACILITY        NFSDDBG_EXPORT
 
 typedef struct auth_domain      svc_client;
@@ -369,16 +354,25 @@ static struct svc_export *svc_export_update(struct svc_export *new,
                                             struct svc_export *old);
 static struct svc_export *svc_export_lookup(struct svc_export *);
 
-static int check_export(struct inode *inode, int flags, unsigned char *uuid)
+static int check_export(struct inode *inode, int *flags, unsigned char *uuid)
 {
 
-        /* We currently export only dirs and regular files.
-         * This is what umountd does.
+        /*
+         * We currently export only dirs, regular files, and (for v4
+         * pseudoroot) symlinks.
          */
         if (!S_ISDIR(inode->i_mode) &&
+            !S_ISLNK(inode->i_mode) &&
             !S_ISREG(inode->i_mode))
                 return -ENOTDIR;
 
+        /*
+         * Mountd should never pass down a writeable V4ROOT export, but,
+         * just to make sure:
+         */
+        if (*flags & NFSEXP_V4ROOT)
+                *flags |= NFSEXP_READONLY;
+
         /* There are two requirements on a filesystem to be exportable.
          * 1:  We must be able to identify the filesystem from a number.
          *       either a device number (so FS_REQUIRES_DEV needed)
@@ -387,7 +381,7 @@ static int check_export(struct inode *inode, int flags, unsigned char *uuid)
          *       This means that s_export_op must be set.
          */
         if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) &&
-            !(flags & NFSEXP_FSID) &&
+            !(*flags & NFSEXP_FSID) &&
             uuid == NULL) {
                 dprintk("exp_export: export of non-dev fs without fsid\n");
                 return -EINVAL;
@@ -602,7 +596,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
                                 goto out4;
                 }
 
-                err = check_export(exp.ex_path.dentry->d_inode, exp.ex_flags,
+                err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags,
                                    exp.ex_uuid);
                 if (err)
                         goto out4;
@@ -1041,7 +1035,7 @@ exp_export(struct nfsctl_export *nxp)
                 goto finish;
         }
 
-        err = check_export(path.dentry->d_inode, nxp->ex_flags, NULL);
+        err = check_export(path.dentry->d_inode, &nxp->ex_flags, NULL);
         if (err) goto finish;
 
         err = -ENOMEM;
@@ -1320,6 +1314,23 @@ rqst_exp_parent(struct svc_rqst *rqstp, struct path *path)
         return exp;
 }
 
+static struct svc_export *find_fsidzero_export(struct svc_rqst *rqstp)
+{
+        struct svc_export *exp;
+        u32 fsidv[2];
+
+        mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
+
+        exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
+        /*
+         * We shouldn't have accepting an nfsv4 request at all if we
+         * don't have a pseudoexport!:
+         */
+        if (IS_ERR(exp) && PTR_ERR(exp) == -ENOENT)
+                exp = ERR_PTR(-ESERVERFAULT);
+        return exp;
+}
+
 /*
  * Called when we need the filehandle for the root of the pseudofs,
  * for a given NFSv4 client.   The root is defined to be the
@@ -1330,11 +1341,8 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
 {
         struct svc_export *exp;
         __be32 rv;
-        u32 fsidv[2];
 
-        mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
-
-        exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
+        exp = find_fsidzero_export(rqstp);
         if (IS_ERR(exp))
                 return nfserrno(PTR_ERR(exp));
         rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL);
@@ -1425,6 +1433,7 @@ static struct flags {
         { NFSEXP_CROSSMOUNT, {"crossmnt", ""}},
         { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}},
         { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}},
+        { NFSEXP_V4ROOT, {"v4root", ""}},
 #ifdef MSNFS
         { NFSEXP_MSNFS, {"msnfs", ""}},
 #endif
diff --git a/fs/nfsd/lockd.c b/fs/nfsd/lockd.c
index b2786a5f9afe..0c6d81670137 100644
--- a/fs/nfsd/lockd.c
+++ b/fs/nfsd/lockd.c
@@ -1,6 +1,4 @@
 /*
- * linux/fs/nfsd/lockd.c
- *
  * This file contains all the stubs needed when communicating with lockd.
  * This level of indirection is necessary so we can run nfsd+lockd without
  * requiring the nfs client to be compiled in/loaded, and vice versa.
@@ -8,14 +6,10 @@
  * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/types.h>
-#include <linux/fs.h>
 #include <linux/file.h>
-#include <linux/mount.h>
-#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
 #include <linux/lockd/bind.h>
+#include "nfsd.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_LOCKD
 
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index 4e3219e84116..f20589d2ae27 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -1,19 +1,15 @@
 /*
- * linux/fs/nfsd/nfs2acl.c
- *
  * Process version 2 NFSACL requests.
  *
  * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
  */
 
-#include <linux/sunrpc/svc.h>
-#include <linux/nfs.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr.h>
-#include <linux/nfsd/xdr3.h>
-#include <linux/posix_acl.h>
+#include "nfsd.h"
+/* FIXME: nfsacl.h is a broken header */
 #include <linux/nfsacl.h>
+#include "cache.h"
+#include "xdr3.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 #define RETURN_STATUS(st)       { resp->status = (st); return (st); }
@@ -217,6 +213,16 @@ static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
  * XDR encode functions
  */
 
+/*
+ * There must be an encoding function for void results so svc_process
+ * will work properly.
+ */
+int
+nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
+{
+        return xdr_ressize_check(rqstp, p);
+}
+
 /* GETACL */
 static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
                 struct nfsd3_getaclres *resp)
@@ -308,7 +314,6 @@ static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p,
 }
 
 #define nfsaclsvc_decode_voidargs       NULL
-#define nfsaclsvc_encode_voidres        NULL
 #define nfsaclsvc_release_void          NULL
 #define nfsd3_fhandleargs       nfsd_fhandle
 #define nfsd3_attrstatres       nfsd_attrstat
@@ -346,5 +351,5 @@ struct svc_version	nfsd_acl_version2 = {
                 .vs_proc        = nfsd_acl_procedures2,
                 .vs_dispatch    = nfsd_dispatch,
                 .vs_xdrsize     = NFS3_SVC_XDRSIZE,
-                .vs_hidden      = 1,
+                .vs_hidden      = 0,
 };
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 9981dbb377a3..e0c4846bad92 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -1,18 +1,15 @@
 /*
- * linux/fs/nfsd/nfs3acl.c
- *
  * Process version 3 NFSACL requests.
  *
  * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
  */
 
-#include <linux/sunrpc/svc.h>
-#include <linux/nfs3.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr3.h>
-#include <linux/posix_acl.h>
+#include "nfsd.h"
+/* FIXME: nfsacl.h is a broken header */
 #include <linux/nfsacl.h>
+#include "cache.h"
+#include "xdr3.h"
+#include "vfs.h"
 
 #define RETURN_STATUS(st)       { resp->status = (st); return (st); }
 
@@ -264,6 +261,6 @@ struct svc_version	nfsd_acl_version3 = {
                 .vs_proc        = nfsd_acl_procedures3,
                 .vs_dispatch    = nfsd_dispatch,
                 .vs_xdrsize     = NFS3_SVC_XDRSIZE,
-                .vs_hidden      = 1,
+                .vs_hidden      = 0,
 };
 
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index a713c418a922..3d68f45a37b9 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -1,30 +1,16 @@
 /*
- * linux/fs/nfsd/nfs3proc.c
- *
  * Process version 3 NFS requests.
  *
  * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/linkage.h>
-#include <linux/time.h>
-#include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/ext2_fs.h>
-#include <linux/stat.h>
-#include <linux/fcntl.h>
-#include <linux/net.h>
-#include <linux/in.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/major.h>
 #include <linux/magic.h>
 
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr3.h>
-#include <linux/nfs3.h>
+#include "cache.h"
+#include "xdr3.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index d0a2ce1b4324..2a533a0af2a9 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -1,6 +1,4 @@
 /*
- * linux/fs/nfsd/nfs3xdr.c
- *
  * XDR support for nfsd/protocol version 3.
  *
  * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
@@ -8,19 +6,8 @@
  * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
  */
 
-#include <linux/types.h>
-#include <linux/time.h>
-#include <linux/nfs3.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-#include <linux/dcache.h>
 #include <linux/namei.h>
-#include <linux/mm.h>
-#include <linux/vfs.h>
-#include <linux/sunrpc/xdr.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/xdr3.h>
+#include "xdr3.h"
 #include "auth.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_XDR
diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index 725d02f210e2..88150685df34 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -1,6 +1,4 @@
 /*
- *  fs/nfs4acl/acl.c
- *
  *  Common NFSv4 ACL handling code.
  *
  *  Copyright (c) 2002, 2003 The Regents of the University of Michigan.
@@ -36,15 +34,7 @@
  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/module.h>
 #include <linux/nfs_fs.h>
-#include <linux/posix_acl.h>
-#include <linux/nfs4.h>
 #include <linux/nfs4_acl.h>
 
 
@@ -389,7 +379,7 @@ sort_pacl(struct posix_acl *pacl)
         sort_pacl_range(pacl, 1, i-1);
 
         BUG_ON(pacl->a_entries[i].e_tag != ACL_GROUP_OBJ);
-        j = i++;
+        j = ++i;
         while (pacl->a_entries[j].e_tag == ACL_GROUP)
                 j++;
         sort_pacl_range(pacl, i, j-1);
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 24e8d78f8dde..c6eed2a3b093 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1,6 +1,4 @@
 /*
- *  linux/fs/nfsd/nfs4callback.c
- *
  *  Copyright (c) 2001 The Regents of the University of Michigan.
  *  All rights reserved.
  *
@@ -33,22 +31,9 @@
  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/inet.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/kthread.h>
-#include <linux/sunrpc/xdr.h>
-#include <linux/sunrpc/svc.h>
 #include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/svcsock.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/state.h>
-#include <linux/sunrpc/sched.h>
-#include <linux/nfs4.h>
-#include <linux/sunrpc/xprtsock.h>
+#include "nfsd.h"
+#include "state.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index ba2c199592fd..6e2983b27f3c 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -1,6 +1,4 @@
 /*
- *  fs/nfsd/nfs4idmap.c
- *
  *  Mapping of UID/GIDs to name and vice versa.
  *
  *  Copyright (c) 2002, 2003 The Regents of the University of
@@ -35,22 +33,9 @@
  */
 
 #include <linux/module.h>
-#include <linux/init.h>
-
-#include <linux/mm.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/sunrpc/clnt.h>
-#include <linux/nfs.h>
-#include <linux/nfs4.h>
-#include <linux/nfs_fs.h>
-#include <linux/nfs_page.h>
-#include <linux/sunrpc/cache.h>
 #include <linux/nfsd_idmap.h>
-#include <linux/list.h>
-#include <linux/time.h>
 #include <linux/seq_file.h>
-#include <linux/sunrpc/svcauth.h>
+#include <linux/sched.h>
 
 /*
  * Cache entry
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index bebc0c2e1b0a..37514c469846 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1,6 +1,4 @@
 /*
- *  fs/nfsd/nfs4proc.c
- *
  *  Server-side procedures for NFSv4.
  *
  *  Copyright (c) 2002 The Regents of the University of Michigan.
@@ -34,20 +32,11 @@
  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
-#include <linux/param.h>
-#include <linux/major.h>
-#include <linux/slab.h>
 #include <linux/file.h>
 
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfs4.h>
-#include <linux/nfsd/state.h>
-#include <linux/nfsd/xdr4.h>
-#include <linux/nfs4_acl.h>
-#include <linux/sunrpc/gss_api.h>
+#include "cache.h"
+#include "xdr4.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
@@ -170,7 +159,7 @@ do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs
                 accmode |= NFSD_MAY_READ;
         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
-        if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
+        if (open->op_share_deny & NFS4_SHARE_DENY_READ)
                 accmode |= NFSD_MAY_WRITE;
 
         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index b5348405046b..5a754f7b71ed 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -1,6 +1,4 @@
 /*
-*  linux/fs/nfsd/nfs4recover.c
-*
 *  Copyright (c) 2004 The Regents of the University of Michigan.
 *  All rights reserved.
 *
@@ -33,20 +31,14 @@
 *
 */
 
-#include <linux/err.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfs4.h>
-#include <linux/nfsd/state.h>
-#include <linux/nfsd/xdr4.h>
-#include <linux/param.h>
 #include <linux/file.h>
 #include <linux/namei.h>
-#include <asm/uaccess.h>
-#include <linux/scatterlist.h>
 #include <linux/crypto.h>
 #include <linux/sched.h>
-#include <linux/mount.h>
+
+#include "nfsd.h"
+#include "state.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2153f9bdbebd..f19ed866c95f 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1,6 +1,4 @@
 /*
-*  linux/fs/nfsd/nfs4state.c
-*
 *  Copyright (c) 2001 The Regents of the University of Michigan.
 *  All rights reserved.
 *
@@ -34,28 +32,14 @@
 *
 */
 
-#include <linux/param.h>
-#include <linux/major.h>
-#include <linux/slab.h>
-
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
 #include <linux/file.h>
-#include <linux/mount.h>
-#include <linux/workqueue.h>
 #include <linux/smp_lock.h>
-#include <linux/kthread.h>
-#include <linux/nfs4.h>
-#include <linux/nfsd/state.h>
-#include <linux/nfsd/xdr4.h>
 #include <linux/namei.h>
 #include <linux/swap.h>
-#include <linux/mutex.h>
-#include <linux/lockd/bind.h>
-#include <linux/module.h>
 #include <linux/sunrpc/svcauth_gss.h>
 #include <linux/sunrpc/clnt.h>
+#include "xdr4.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
@@ -477,13 +461,14 @@ static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan)
 
 /*
  * fchan holds the client values on input, and the server values on output
+ * sv_max_mesg is the maximum payload plus one page for overhead.
  */
 static int init_forechannel_attrs(struct svc_rqst *rqstp,
                                   struct nfsd4_channel_attrs *session_fchan,
                                   struct nfsd4_channel_attrs *fchan)
 {
         int status = 0;
-        __u32   maxcount = svc_max_payload(rqstp);
+        __u32   maxcount = nfsd_serv->sv_max_mesg;
 
         /* headerpadsz set to zero in encode routine */
 
@@ -523,6 +508,15 @@ free_session_slots(struct nfsd4_session *ses)
                 kfree(ses->se_slots[i]);
 }
 
+/*
+ * We don't actually need to cache the rpc and session headers, so we
+ * can allocate a little less for each slot:
+ */
+static inline int slot_bytes(struct nfsd4_channel_attrs *ca)
+{
+        return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
+}
+
 static int
 alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp,
                    struct nfsd4_create_session *cses)
@@ -554,7 +548,7 @@ alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp,
         memcpy(new, &tmp, sizeof(*new));
 
         /* allocate each struct nfsd4_slot and data cache in one piece */
-        cachesize = new->se_fchannel.maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
+        cachesize = slot_bytes(&new->se_fchannel);
         for (i = 0; i < new->se_fchannel.maxreqs; i++) {
                 sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL);
                 if (!sp)
@@ -628,10 +622,12 @@ void
 free_session(struct kref *kref)
 {
         struct nfsd4_session *ses;
+        int mem;
 
         ses = container_of(kref, struct nfsd4_session, se_ref);
         spin_lock(&nfsd_drc_lock);
-        nfsd_drc_mem_used -= ses->se_fchannel.maxreqs * NFSD_SLOT_CACHE_SIZE;
+        mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel);
+        nfsd_drc_mem_used -= mem;
         spin_unlock(&nfsd_drc_lock);
         free_session_slots(ses);
         kfree(ses);
@@ -2404,11 +2400,8 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
 
         memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
 
-        dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
-                     dp->dl_stateid.si_boot,
-                     dp->dl_stateid.si_stateownerid,
-                     dp->dl_stateid.si_fileid,
-                     dp->dl_stateid.si_generation);
+        dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
+                STATEID_VAL(&dp->dl_stateid));
 out:
         if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
                         && flag == NFS4_OPEN_DELEGATE_NONE
@@ -2498,9 +2491,8 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
 
         status = nfs_ok;
 
-        dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
-                    stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
-                    stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
+        dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
+                STATEID_VAL(&stp->st_stateid));
 out:
         if (fp)
                 put_nfs4_file(fp);
@@ -2666,9 +2658,8 @@ STALE_STATEID(stateid_t *stateid)
 {
         if (time_after((unsigned long)boot_time,
                         (unsigned long)stateid->si_boot)) {
-                dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
-                        stateid->si_boot, stateid->si_stateownerid,
-                        stateid->si_fileid, stateid->si_generation);
+                dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
+                        STATEID_VAL(stateid));
                 return 1;
         }
         return 0;
@@ -2680,9 +2671,8 @@ EXPIRED_STATEID(stateid_t *stateid)
         if (time_before((unsigned long)boot_time,
                         ((unsigned long)stateid->si_boot)) &&
             time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) {
-                dprintk("NFSD: expired stateid (%08x/%08x/%08x/%08x)!\n",
-                        stateid->si_boot, stateid->si_stateownerid,
-                        stateid->si_fileid, stateid->si_generation);
+                dprintk("NFSD: expired stateid " STATEID_FMT "!\n",
+                        STATEID_VAL(stateid));
                 return 1;
         }
         return 0;
@@ -2696,9 +2686,8 @@ stateid_error_map(stateid_t *stateid)
         if (EXPIRED_STATEID(stateid))
                 return nfserr_expired;
 
-        dprintk("NFSD: bad stateid (%08x/%08x/%08x/%08x)!\n",
-                stateid->si_boot, stateid->si_stateownerid,
-                stateid->si_fileid, stateid->si_generation);
+        dprintk("NFSD: bad stateid " STATEID_FMT "!\n",
+                STATEID_VAL(stateid));
         return nfserr_bad_stateid;
 }
 
@@ -2884,10 +2873,8 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
         struct svc_fh *current_fh = &cstate->current_fh;
         __be32 status;
 
-        dprintk("NFSD: preprocess_seqid_op: seqid=%d " 
-                        "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
-                stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
-                stateid->si_generation);
+        dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
+                seqid, STATEID_VAL(stateid));
 
         *stpp = NULL;
         *sopp = NULL;
@@ -3019,12 +3006,8 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
         sop->so_confirmed = 1;
         update_stateid(&stp->st_stateid);
         memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
-        dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 
-                "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
-                         stp->st_stateid.si_boot,
-                         stp->st_stateid.si_stateownerid,
-                         stp->st_stateid.si_fileid,
-                         stp->st_stateid.si_generation);
+        dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
+                __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid));
 
         nfsd4_create_clid_dir(sop->so_client);
 out:
@@ -3283,9 +3266,8 @@ find_delegation_stateid(struct inode *ino, stateid_t *stid)
         struct nfs4_file *fp;
         struct nfs4_delegation *dl;
 
-        dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
-                    stid->si_boot, stid->si_stateownerid,
-                    stid->si_fileid, stid->si_generation);
+        dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__,
+                STATEID_VAL(stid));
 
         fp = find_file(ino);
         if (!fp)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 0fbd50cee1f6..a8587e90fd5a 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -40,24 +40,16 @@
  * at the end of nfs4svc_decode_compoundargs.
  */
 
-#include <linux/param.h>
-#include <linux/smp.h>
-#include <linux/fs.h>
 #include <linux/namei.h>
-#include <linux/vfs.h>
+#include <linux/statfs.h>
 #include <linux/utsname.h>
-#include <linux/sunrpc/xdr.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/sunrpc/clnt.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/state.h>
-#include <linux/nfsd/xdr4.h>
 #include <linux/nfsd_idmap.h>
-#include <linux/nfs4.h>
 #include <linux/nfs4_acl.h>
-#include <linux/sunrpc/gss_api.h>
 #include <linux/sunrpc/svcauth_gss.h>
 
+#include "xdr4.h"
+#include "vfs.h"
+
 #define NFSDDBG_FACILITY                NFSDDBG_XDR
 
 /*
@@ -2204,11 +2196,14 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
          * we will not follow the cross mount and will fill the attribtutes
          * directly from the mountpoint dentry.
          */
-        if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
-                ignore_crossmnt = 1;
-        else if (d_mountpoint(dentry)) {
+        if (nfsd_mountpoint(dentry, exp)) {
                 int err;
 
+                if (!(exp->ex_flags & NFSEXP_V4ROOT)
+                                && !attributes_need_mount(cd->rd_bmval)) {
+                        ignore_crossmnt = 1;
+                        goto out_encode;
+                }
                 /*
                  * Why the heck aren't we just using nfsd_lookup??
                  * Different "."/".." handling?  Something else?
@@ -2224,6 +2219,7 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
                         goto out_put;
 
         }
+out_encode:
         nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
                                         cd->rd_rqstp, ignore_crossmnt);
 out_put:
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 4638635c5d87..da08560c4818 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -1,6 +1,4 @@
 /*
- * linux/fs/nfsd/nfscache.c
- *
  * Request reply cache. This is currently a global cache, but this may
  * change in the future and be a per-client cache.
  *
@@ -10,16 +8,8 @@
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/kernel.h>
-#include <linux/time.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
+#include "nfsd.h"
+#include "cache.h"
 
 /* Size of reply cache. Common values are:
  * 4.3BSD:      128
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc148ce8..2604c3e70ea5 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1,46 +1,20 @@
 /*
- * linux/fs/nfsd/nfsctl.c
- *
  * Syscall interface to knfsd.
  *
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/module.h>
-
-#include <linux/linkage.h>
-#include <linux/time.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
 #include <linux/namei.h>
-#include <linux/fcntl.h>
-#include <linux/net.h>
-#include <linux/in.h>
-#include <linux/syscalls.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/init.h>
-#include <linux/inet.h>
-#include <linux/string.h>
 #include <linux/ctype.h>
 
-#include <linux/nfs.h>
 #include <linux/nfsd_idmap.h>
-#include <linux/lockd/bind.h>
-#include <linux/sunrpc/svc.h>
 #include <linux/sunrpc/svcsock.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr.h>
 #include <linux/nfsd/syscall.h>
 #include <linux/lockd/lockd.h>
 #include <linux/sunrpc/clnt.h>
 
-#include <asm/uaccess.h>
-#include <net/ipv6.h>
+#include "nfsd.h"
+#include "cache.h"
 
 /*
  *      We have a single directory with 9 nodes in it.
@@ -55,6 +29,7 @@ enum {
         NFSD_Getfd,
         NFSD_Getfs,
         NFSD_List,
+        NFSD_Export_features,
         NFSD_Fh,
         NFSD_FO_UnlockIP,
         NFSD_FO_UnlockFS,
@@ -173,6 +148,24 @@ static const struct file_operations exports_operations = {
         .owner          = THIS_MODULE,
 };
 
+static int export_features_show(struct seq_file *m, void *v)
+{
+        seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
+        return 0;
+}
+
+static int export_features_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, export_features_show, NULL);
+}
+
+static struct file_operations export_features_operations = {
+        .open           = export_features_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
 extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
 
@@ -1330,6 +1323,8 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
                 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
+                [NFSD_Export_features] = {"export_features",
+                                        &export_features_operations, S_IRUGO},
                 [NFSD_FO_UnlockIP] = {"unlock_ip",
                                         &transaction_ops, S_IWUSR|S_IRUSR},
                 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
new file mode 100644
index 000000000000..e942a1aaac92
--- /dev/null
+++ b/fs/nfsd/nfsd.h
@@ -0,0 +1,338 @@
+/*
+ * Hodge-podge collection of knfsd-related stuff.
+ * I will sort this out later.
+ *
+ * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_NFSD_NFSD_H
+#define LINUX_NFSD_NFSD_H
+
+#include <linux/types.h>
+#include <linux/mount.h>
+
+#include <linux/nfsd/debug.h>
+#include <linux/nfsd/export.h>
+#include <linux/nfsd/stats.h>
+/*
+ * nfsd version
+ */
+#define NFSD_SUPPORTED_MINOR_VERSION    1
+
+struct readdir_cd {
+        __be32                  err;    /* 0, nfserr, or nfserr_eof */
+};
+
+
+extern struct svc_program       nfsd_program;
+extern struct svc_version       nfsd_version2, nfsd_version3,
+                                nfsd_version4;
+extern u32                      nfsd_supported_minorversion;
+extern struct mutex             nfsd_mutex;
+extern struct svc_serv          *nfsd_serv;
+extern spinlock_t               nfsd_drc_lock;
+extern unsigned int             nfsd_drc_max_mem;
+extern unsigned int             nfsd_drc_mem_used;
+
+extern const struct seq_operations nfs_exports_op;
+
+/*
+ * Function prototypes.
+ */
+int             nfsd_svc(unsigned short port, int nrservs);
+int             nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
+
+int             nfsd_nrthreads(void);
+int             nfsd_nrpools(void);
+int             nfsd_get_nrthreads(int n, int *);
+int             nfsd_set_nrthreads(int n, int *);
+
+#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
+#ifdef CONFIG_NFSD_V2_ACL
+extern struct svc_version nfsd_acl_version2;
+#else
+#define nfsd_acl_version2 NULL
+#endif
+#ifdef CONFIG_NFSD_V3_ACL
+extern struct svc_version nfsd_acl_version3;
+#else
+#define nfsd_acl_version3 NULL
+#endif
+#endif
+
+enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
+int nfsd_vers(int vers, enum vers_op change);
+int nfsd_minorversion(u32 minorversion, enum vers_op change);
+void nfsd_reset_versions(void);
+int nfsd_create_serv(void);
+
+extern int nfsd_max_blksize;
+
+static inline int nfsd_v4client(struct svc_rqst *rq)
+{
+        return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
+}
+
+/* 
+ * NFSv4 State
+ */
+#ifdef CONFIG_NFSD_V4
+extern unsigned int max_delegations;
+int nfs4_state_init(void);
+void nfsd4_free_slabs(void);
+int nfs4_state_start(void);
+void nfs4_state_shutdown(void);
+time_t nfs4_lease_time(void);
+void nfs4_reset_lease(time_t leasetime);
+int nfs4_reset_recoverydir(char *recdir);
+#else
+static inline int nfs4_state_init(void) { return 0; }
+static inline void nfsd4_free_slabs(void) { }
+static inline int nfs4_state_start(void) { return 0; }
+static inline void nfs4_state_shutdown(void) { }
+static inline time_t nfs4_lease_time(void) { return 0; }
+static inline void nfs4_reset_lease(time_t leasetime) { }
+static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
+#endif
+
+/*
+ * lockd binding
+ */
+void            nfsd_lockd_init(void);
+void            nfsd_lockd_shutdown(void);
+
+
+/*
+ * These macros provide pre-xdr'ed values for faster operation.
+ */
+#define nfs_ok                  cpu_to_be32(NFS_OK)
+#define nfserr_perm             cpu_to_be32(NFSERR_PERM)
+#define nfserr_noent            cpu_to_be32(NFSERR_NOENT)
+#define nfserr_io               cpu_to_be32(NFSERR_IO)
+#define nfserr_nxio             cpu_to_be32(NFSERR_NXIO)
+#define nfserr_eagain           cpu_to_be32(NFSERR_EAGAIN)
+#define nfserr_acces            cpu_to_be32(NFSERR_ACCES)
+#define nfserr_exist            cpu_to_be32(NFSERR_EXIST)
+#define nfserr_xdev             cpu_to_be32(NFSERR_XDEV)
+#define nfserr_nodev            cpu_to_be32(NFSERR_NODEV)
+#define nfserr_notdir           cpu_to_be32(NFSERR_NOTDIR)
+#define nfserr_isdir            cpu_to_be32(NFSERR_ISDIR)
+#define nfserr_inval            cpu_to_be32(NFSERR_INVAL)
+#define nfserr_fbig             cpu_to_be32(NFSERR_FBIG)
+#define nfserr_nospc            cpu_to_be32(NFSERR_NOSPC)
+#define nfserr_rofs             cpu_to_be32(NFSERR_ROFS)
+#define nfserr_mlink            cpu_to_be32(NFSERR_MLINK)
+#define nfserr_opnotsupp        cpu_to_be32(NFSERR_OPNOTSUPP)
+#define nfserr_nametoolong      cpu_to_be32(NFSERR_NAMETOOLONG)
+#define nfserr_notempty         cpu_to_be32(NFSERR_NOTEMPTY)
+#define nfserr_dquot            cpu_to_be32(NFSERR_DQUOT)
+#define nfserr_stale            cpu_to_be32(NFSERR_STALE)
+#define nfserr_remote           cpu_to_be32(NFSERR_REMOTE)
+#define nfserr_wflush           cpu_to_be32(NFSERR_WFLUSH)
+#define nfserr_badhandle        cpu_to_be32(NFSERR_BADHANDLE)
+#define nfserr_notsync          cpu_to_be32(NFSERR_NOT_SYNC)
+#define nfserr_badcookie        cpu_to_be32(NFSERR_BAD_COOKIE)
+#define nfserr_notsupp          cpu_to_be32(NFSERR_NOTSUPP)
+#define nfserr_toosmall         cpu_to_be32(NFSERR_TOOSMALL)
+#define nfserr_serverfault      cpu_to_be32(NFSERR_SERVERFAULT)
+#define nfserr_badtype          cpu_to_be32(NFSERR_BADTYPE)
+#define nfserr_jukebox          cpu_to_be32(NFSERR_JUKEBOX)
+#define nfserr_denied           cpu_to_be32(NFSERR_DENIED)
+#define nfserr_deadlock         cpu_to_be32(NFSERR_DEADLOCK)
+#define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
+#define nfserr_bad_cookie       cpu_to_be32(NFSERR_BAD_COOKIE)
+#define nfserr_same             cpu_to_be32(NFSERR_SAME)
+#define nfserr_clid_inuse       cpu_to_be32(NFSERR_CLID_INUSE)
+#define nfserr_stale_clientid   cpu_to_be32(NFSERR_STALE_CLIENTID)
+#define nfserr_resource         cpu_to_be32(NFSERR_RESOURCE)
+#define nfserr_moved            cpu_to_be32(NFSERR_MOVED)
+#define nfserr_nofilehandle     cpu_to_be32(NFSERR_NOFILEHANDLE)
+#define nfserr_minor_vers_mismatch      cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
+#define nfserr_share_denied     cpu_to_be32(NFSERR_SHARE_DENIED)
+#define nfserr_stale_stateid    cpu_to_be32(NFSERR_STALE_STATEID)
+#define nfserr_old_stateid      cpu_to_be32(NFSERR_OLD_STATEID)
+#define nfserr_bad_stateid      cpu_to_be32(NFSERR_BAD_STATEID)
+#define nfserr_bad_seqid        cpu_to_be32(NFSERR_BAD_SEQID)
+#define nfserr_symlink          cpu_to_be32(NFSERR_SYMLINK)
+#define nfserr_not_same         cpu_to_be32(NFSERR_NOT_SAME)
+#define nfserr_restorefh        cpu_to_be32(NFSERR_RESTOREFH)
+#define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
+#define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
+#define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
+#define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
+#define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
+#define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
+#define nfserr_no_grace         cpu_to_be32(NFSERR_NO_GRACE)
+#define nfserr_reclaim_bad      cpu_to_be32(NFSERR_RECLAIM_BAD)
+#define nfserr_badname          cpu_to_be32(NFSERR_BADNAME)
+#define nfserr_cb_path_down     cpu_to_be32(NFSERR_CB_PATH_DOWN)
+#define nfserr_locked           cpu_to_be32(NFSERR_LOCKED)
+#define nfserr_wrongsec         cpu_to_be32(NFSERR_WRONGSEC)
+#define nfserr_badiomode                cpu_to_be32(NFS4ERR_BADIOMODE)
+#define nfserr_badlayout                cpu_to_be32(NFS4ERR_BADLAYOUT)
+#define nfserr_bad_session_digest       cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
+#define nfserr_badsession               cpu_to_be32(NFS4ERR_BADSESSION)
+#define nfserr_badslot                  cpu_to_be32(NFS4ERR_BADSLOT)
+#define nfserr_complete_already         cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
+#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
+#define nfserr_deleg_already_wanted     cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
+#define nfserr_back_chan_busy           cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
+#define nfserr_layouttrylater           cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
+#define nfserr_layoutunavailable        cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
+#define nfserr_nomatching_layout        cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
+#define nfserr_recallconflict           cpu_to_be32(NFS4ERR_RECALLCONFLICT)
+#define nfserr_unknown_layouttype       cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
+#define nfserr_seq_misordered           cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
+#define nfserr_sequence_pos             cpu_to_be32(NFS4ERR_SEQUENCE_POS)
+#define nfserr_req_too_big              cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
+#define nfserr_rep_too_big              cpu_to_be32(NFS4ERR_REP_TOO_BIG)
+#define nfserr_rep_too_big_to_cache     cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
+#define nfserr_retry_uncached_rep       cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
+#define nfserr_unsafe_compound          cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
+#define nfserr_too_many_ops             cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
+#define nfserr_op_not_in_session        cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
+#define nfserr_hash_alg_unsupp          cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
+#define nfserr_clientid_busy            cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
+#define nfserr_pnfs_io_hole             cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
+#define nfserr_seq_false_retry          cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
+#define nfserr_bad_high_slot            cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
+#define nfserr_deadsession              cpu_to_be32(NFS4ERR_DEADSESSION)
+#define nfserr_encr_alg_unsupp          cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
+#define nfserr_pnfs_no_layout           cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
+#define nfserr_not_only_op              cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
+#define nfserr_wrong_cred               cpu_to_be32(NFS4ERR_WRONG_CRED)
+#define nfserr_wrong_type               cpu_to_be32(NFS4ERR_WRONG_TYPE)
+#define nfserr_dirdeleg_unavail         cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
+#define nfserr_reject_deleg             cpu_to_be32(NFS4ERR_REJECT_DELEG)
+#define nfserr_returnconflict           cpu_to_be32(NFS4ERR_RETURNCONFLICT)
+#define nfserr_deleg_revoked            cpu_to_be32(NFS4ERR_DELEG_REVOKED)
+
+/* error codes for internal use */
+/* if a request fails due to kmalloc failure, it gets dropped.
+ *  Client should resend eventually
+ */
+#define nfserr_dropit           cpu_to_be32(30000)
+/* end-of-file indicator in readdir */
+#define nfserr_eof              cpu_to_be32(30001)
+/* replay detected */
+#define nfserr_replay_me        cpu_to_be32(11001)
+/* nfs41 replay detected */
+#define nfserr_replay_cache     cpu_to_be32(11002)
+
+/* Check for dir entries '.' and '..' */
+#define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
+
+/*
+ * Time of server startup
+ */
+extern struct timeval   nfssvc_boot;
+
+#ifdef CONFIG_NFSD_V4
+
+/* before processing a COMPOUND operation, we have to check that there
+ * is enough space in the buffer for XDR encode to succeed.  otherwise,
+ * we might process an operation with side effects, and be unable to
+ * tell the client that the operation succeeded.
+ *
+ * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
+ * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
+ * READ, READDIR, and READLINK have their own buffer checks.)  if we
+ * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
+ *
+ * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
+ * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
+ * care is taken to ensure that we never fall below this level for any
+ * reason.
+ */
+#define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
+#define COMPOUND_ERR_SLACK_SPACE        12     /* OP_SETATTR */
+
+#define NFSD_LEASE_TIME                 (nfs4_lease_time())
+#define NFSD_LAUNDROMAT_MINTIMEOUT      10   /* seconds */
+
+/*
+ * The following attributes are currently not supported by the NFSv4 server:
+ *    ARCHIVE       (deprecated anyway)
+ *    HIDDEN        (unlikely to be supported any time soon)
+ *    MIMETYPE      (unlikely to be supported any time soon)
+ *    QUOTA_*       (will be supported in a forthcoming patch)
+ *    SYSTEM        (unlikely to be supported any time soon)
+ *    TIME_BACKUP   (unlikely to be supported any time soon)
+ *    TIME_CREATE   (unlikely to be supported any time soon)
+ */
+#define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
+(FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
+ | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
+ | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
+ | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
+ | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
+ | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
+ | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
+ | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
+ | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
+ | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
+
+#define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
+(FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
+ | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
+ | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
+ | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
+ | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \
+ | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
+
+#define NFSD4_SUPPORTED_ATTRS_WORD2 0
+
+#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
+        NFSD4_SUPPORTED_ATTRS_WORD0
+
+#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
+        NFSD4_SUPPORTED_ATTRS_WORD1
+
+#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
+        (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)
+
+static inline u32 nfsd_suppattrs0(u32 minorversion)
+{
+        return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
+                            : NFSD4_SUPPORTED_ATTRS_WORD0;
+}
+
+static inline u32 nfsd_suppattrs1(u32 minorversion)
+{
+        return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
+                            : NFSD4_SUPPORTED_ATTRS_WORD1;
+}
+
+static inline u32 nfsd_suppattrs2(u32 minorversion)
+{
+        return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2
+                            : NFSD4_SUPPORTED_ATTRS_WORD2;
+}
+
+/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
+#define NFSD_WRITEONLY_ATTRS_WORD1                                                          \
+(FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
+
+/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
+#define NFSD_WRITEABLE_ATTRS_WORD0                                                          \
+(FATTR4_WORD0_SIZE              | FATTR4_WORD0_ACL                                         )
+#define NFSD_WRITEABLE_ATTRS_WORD1                                                          \
+(FATTR4_WORD1_MODE              | FATTR4_WORD1_OWNER         | FATTR4_WORD1_OWNER_GROUP     \
+ | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
+#define NFSD_WRITEABLE_ATTRS_WORD2 0
+
+#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
+        NFSD_WRITEABLE_ATTRS_WORD0
+/*
+ * we currently store the exclusive create verifier in the v_{a,m}time
+ * attributes so the client can't set these at create time using EXCLUSIVE4_1
+ */
+#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
+        (NFSD_WRITEABLE_ATTRS_WORD1 & \
+         ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
+#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
+        NFSD_WRITEABLE_ATTRS_WORD2
+
+#endif /* CONFIG_NFSD_V4 */
+
+#endif /* LINUX_NFSD_NFSD_H */
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 01965b2f3a76..1c12177b908c 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -1,6 +1,4 @@
 /*
- * linux/fs/nfsd/nfsfh.c
- *
  * NFS server file handle treatment.
  *
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
@@ -9,19 +7,11 @@
  * ... and again Southern-Winter 2001 to support export_operations
  */
 
-#include <linux/slab.h>
-#include <linux/fs.h>
-#include <linux/unistd.h>
-#include <linux/string.h>
-#include <linux/stat.h>
-#include <linux/dcache.h>
 #include <linux/exportfs.h>
-#include <linux/mount.h>
 
-#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/svc.h>
 #include <linux/sunrpc/svcauth_gss.h>
-#include <linux/nfsd/nfsd.h>
+#include "nfsd.h"
+#include "vfs.h"
 #include "auth.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_FH
@@ -96,8 +86,10 @@ nfsd_mode_check(struct svc_rqst *rqstp, umode_t mode, int type)
 static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,
                                           struct svc_export *exp)
 {
+        int flags = nfsexp_flags(rqstp, exp);
+
         /* Check if the request originated from a secure port. */
-        if (!rqstp->rq_secure && EX_SECURE(exp)) {
+        if (!rqstp->rq_secure && (flags & NFSEXP_INSECURE_PORT)) {
                 RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
                 dprintk(KERN_WARNING
                        "nfsd: request from insecure port %s!\n",
@@ -109,6 +101,36 @@ static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,
         return nfserrno(nfsd_setuser(rqstp, exp));
 }
 
+static inline __be32 check_pseudo_root(struct svc_rqst *rqstp,
+        struct dentry *dentry, struct svc_export *exp)
+{
+        if (!(exp->ex_flags & NFSEXP_V4ROOT))
+                return nfs_ok;
+        /*
+         * v2/v3 clients have no need for the V4ROOT export--they use
+         * the mount protocl instead; also, further V4ROOT checks may be
+         * in v4-specific code, in which case v2/v3 clients could bypass
+         * them.
+         */
+        if (!nfsd_v4client(rqstp))
+                return nfserr_stale;
+        /*
+         * We're exposing only the directories and symlinks that have to be
+         * traversed on the way to real exports:
+         */
+        if (unlikely(!S_ISDIR(dentry->d_inode->i_mode) &&
+                     !S_ISLNK(dentry->d_inode->i_mode)))
+                return nfserr_stale;
+        /*
+         * A pseudoroot export gives permission to access only one
+         * single directory; the kernel has to make another upcall
+         * before granting access to anything else under it:
+         */
+        if (unlikely(dentry != exp->ex_path.dentry))
+                return nfserr_stale;
+        return nfs_ok;
+}
+
 /*
  * Use the given filehandle to look up the corresponding export and
  * dentry.  On success, the results are used to set fh_export and
@@ -232,14 +254,6 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
                 goto out;
         }
 
-        if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) {
-                error = nfsd_setuser_and_check_port(rqstp, exp);
-                if (error) {
-                        dput(dentry);
-                        goto out;
-                }
-        }
-
         if (S_ISDIR(dentry->d_inode->i_mode) &&
                         (dentry->d_flags & DCACHE_DISCONNECTED)) {
                 printk("nfsd: find_fh_dentry returned a DISCONNECTED directory: %s/%s\n",
@@ -294,28 +308,32 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
                 error = nfsd_set_fh_dentry(rqstp, fhp);
                 if (error)
                         goto out;
-                dentry = fhp->fh_dentry;
-                exp = fhp->fh_export;
-        } else {
-                /*
-                 * just rechecking permissions
-                 * (e.g. nfsproc_create calls fh_verify, then nfsd_create
-                 * does as well)
-                 */
-                dprintk("nfsd: fh_verify - just checking\n");
-                dentry = fhp->fh_dentry;
-                exp = fhp->fh_export;
-                /*
-                 * Set user creds for this exportpoint; necessary even
-                 * in the "just checking" case because this may be a
-                 * filehandle that was created by fh_compose, and that
-                 * is about to be used in another nfsv4 compound
-                 * operation.
-                 */
-                error = nfsd_setuser_and_check_port(rqstp, exp);
-                if (error)
-                        goto out;
         }
+        dentry = fhp->fh_dentry;
+        exp = fhp->fh_export;
+        /*
+         * We still have to do all these permission checks, even when
+         * fh_dentry is already set:
+         *      - fh_verify may be called multiple times with different
+         *        "access" arguments (e.g. nfsd_proc_create calls
+         *        fh_verify(...,NFSD_MAY_EXEC) first, then later (in
+         *        nfsd_create) calls fh_verify(...,NFSD_MAY_CREATE).
+         *      - in the NFSv4 case, the filehandle may have been filled
+         *        in by fh_compose, and given a dentry, but further
+         *        compound operations performed with that filehandle
+         *        still need permissions checks.  In the worst case, a
+         *        mountpoint crossing may have changed the export
+         *        options, and we may now need to use a different uid
+         *        (for example, if different id-squashing options are in
+         *        effect on the new filesystem).
+         */
+        error = check_pseudo_root(rqstp, dentry, exp);
+        if (error)
+                goto out;
+
+        error = nfsd_setuser_and_check_port(rqstp, exp);
+        if (error)
+                goto out;
 
         error = nfsd_mode_check(rqstp, dentry->d_inode->i_mode, type);
         if (error)
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h
new file mode 100644
index 000000000000..cdfb8c6a4206
--- /dev/null
+++ b/fs/nfsd/nfsfh.h
@@ -0,0 +1,208 @@
+/* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> */
+
+#ifndef _LINUX_NFSD_FH_INT_H
+#define _LINUX_NFSD_FH_INT_H
+
+#include <linux/nfsd/nfsfh.h>
+
+enum nfsd_fsid {
+        FSID_DEV = 0,
+        FSID_NUM,
+        FSID_MAJOR_MINOR,
+        FSID_ENCODE_DEV,
+        FSID_UUID4_INUM,
+        FSID_UUID8,
+        FSID_UUID16,
+        FSID_UUID16_INUM,
+};
+
+enum fsid_source {
+        FSIDSOURCE_DEV,
+        FSIDSOURCE_FSID,
+        FSIDSOURCE_UUID,
+};
+extern enum fsid_source fsid_source(struct svc_fh *fhp);
+
+
+/* This might look a little large to "inline" but in all calls except
+ * one, 'vers' is constant so moste of the function disappears.
+ */
+static inline void mk_fsid(int vers, u32 *fsidv, dev_t dev, ino_t ino,
+                           u32 fsid, unsigned char *uuid)
+{
+        u32 *up;
+        switch(vers) {
+        case FSID_DEV:
+                fsidv[0] = htonl((MAJOR(dev)<<16) |
+                                 MINOR(dev));
+                fsidv[1] = ino_t_to_u32(ino);
+                break;
+        case FSID_NUM:
+                fsidv[0] = fsid;
+                break;
+        case FSID_MAJOR_MINOR:
+                fsidv[0] = htonl(MAJOR(dev));
+                fsidv[1] = htonl(MINOR(dev));
+                fsidv[2] = ino_t_to_u32(ino);
+                break;
+
+        case FSID_ENCODE_DEV:
+                fsidv[0] = new_encode_dev(dev);
+                fsidv[1] = ino_t_to_u32(ino);
+                break;
+
+        case FSID_UUID4_INUM:
+                /* 4 byte fsid and inode number */
+                up = (u32*)uuid;
+                fsidv[0] = ino_t_to_u32(ino);
+                fsidv[1] = up[0] ^ up[1] ^ up[2] ^ up[3];
+                break;
+
+        case FSID_UUID8:
+                /* 8 byte fsid  */
+                up = (u32*)uuid;
+                fsidv[0] = up[0] ^ up[2];
+                fsidv[1] = up[1] ^ up[3];
+                break;
+
+        case FSID_UUID16:
+                /* 16 byte fsid - NFSv3+ only */
+                memcpy(fsidv, uuid, 16);
+                break;
+
+        case FSID_UUID16_INUM:
+                /* 8 byte inode and 16 byte fsid */
+                *(u64*)fsidv = (u64)ino;
+                memcpy(fsidv+2, uuid, 16);
+                break;
+        default: BUG();
+        }
+}
+
+static inline int key_len(int type)
+{
+        switch(type) {
+        case FSID_DEV:          return 8;
+        case FSID_NUM:          return 4;
+        case FSID_MAJOR_MINOR:  return 12;
+        case FSID_ENCODE_DEV:   return 8;
+        case FSID_UUID4_INUM:   return 8;
+        case FSID_UUID8:        return 8;
+        case FSID_UUID16:       return 16;
+        case FSID_UUID16_INUM:  return 24;
+        default: return 0;
+        }
+}
+
+/*
+ * Shorthand for dprintk()'s
+ */
+extern char * SVCFH_fmt(struct svc_fh *fhp);
+
+/*
+ * Function prototypes
+ */
+__be32  fh_verify(struct svc_rqst *, struct svc_fh *, int, int);
+__be32  fh_compose(struct svc_fh *, struct svc_export *, struct dentry *, struct svc_fh *);
+__be32  fh_update(struct svc_fh *);
+void    fh_put(struct svc_fh *);
+
+static __inline__ struct svc_fh *
+fh_copy(struct svc_fh *dst, struct svc_fh *src)
+{
+        WARN_ON(src->fh_dentry || src->fh_locked);
+                        
+        *dst = *src;
+        return dst;
+}
+
+static inline void
+fh_copy_shallow(struct knfsd_fh *dst, struct knfsd_fh *src)
+{
+        dst->fh_size = src->fh_size;
+        memcpy(&dst->fh_base, &src->fh_base, src->fh_size);
+}
+
+static __inline__ struct svc_fh *
+fh_init(struct svc_fh *fhp, int maxsize)
+{
+        memset(fhp, 0, sizeof(*fhp));
+        fhp->fh_maxsize = maxsize;
+        return fhp;
+}
+
+#ifdef CONFIG_NFSD_V3
+/*
+ * Fill in the pre_op attr for the wcc data
+ */
+static inline void
+fill_pre_wcc(struct svc_fh *fhp)
+{
+        struct inode    *inode;
+
+        inode = fhp->fh_dentry->d_inode;
+        if (!fhp->fh_pre_saved) {
+                fhp->fh_pre_mtime = inode->i_mtime;
+                fhp->fh_pre_ctime = inode->i_ctime;
+                fhp->fh_pre_size  = inode->i_size;
+                fhp->fh_pre_change = inode->i_version;
+                fhp->fh_pre_saved = 1;
+        }
+}
+
+extern void fill_post_wcc(struct svc_fh *);
+#else
+#define fill_pre_wcc(ignored)
+#define fill_post_wcc(notused)
+#endif /* CONFIG_NFSD_V3 */
+
+
+/*
+ * Lock a file handle/inode
+ * NOTE: both fh_lock and fh_unlock are done "by hand" in
+ * vfs.c:nfsd_rename as it needs to grab 2 i_mutex's at once
+ * so, any changes here should be reflected there.
+ */
+
+static inline void
+fh_lock_nested(struct svc_fh *fhp, unsigned int subclass)
+{
+        struct dentry   *dentry = fhp->fh_dentry;
+        struct inode    *inode;
+
+        BUG_ON(!dentry);
+
+        if (fhp->fh_locked) {
+                printk(KERN_WARNING "fh_lock: %s/%s already locked!\n",
+                        dentry->d_parent->d_name.name, dentry->d_name.name);
+                return;
+        }
+
+        inode = dentry->d_inode;
+        mutex_lock_nested(&inode->i_mutex, subclass);
+        fill_pre_wcc(fhp);
+        fhp->fh_locked = 1;
+}
+
+static inline void
+fh_lock(struct svc_fh *fhp)
+{
+        fh_lock_nested(fhp, I_MUTEX_NORMAL);
+}
+
+/*
+ * Unlock a file handle/inode
+ */
+static inline void
+fh_unlock(struct svc_fh *fhp)
+{
+        BUG_ON(!fhp->fh_dentry);
+
+        if (fhp->fh_locked) {
+                fill_post_wcc(fhp);
+                mutex_unlock(&fhp->fh_dentry->d_inode->i_mutex);
+                fhp->fh_locked = 0;
+        }
+}
+
+#endif /* _LINUX_NFSD_FH_INT_H */
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 0eb9c820b7a6..a047ad6111ef 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -1,29 +1,14 @@
 /*
- * nfsproc2.c   Process version 2 NFS requests.
- * linux/fs/nfsd/nfs2proc.c
- * 
  * Process version 2 NFS requests.
  *
  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/linkage.h>
-#include <linux/time.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <linux/fcntl.h>
-#include <linux/net.h>
-#include <linux/in.h>
 #include <linux/namei.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
 
-#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr.h>
+#include "cache.h"
+#include "xdr.h"
+#include "vfs.h"
 
 typedef struct svc_rqst svc_rqst;
 typedef struct svc_buf  svc_buf;
@@ -758,6 +743,7 @@ nfserrno (int errno)
                 { nfserr_io, -ETXTBSY },
                 { nfserr_notsupp, -EOPNOTSUPP },
                 { nfserr_toosmall, -ETOOSMALL },
+                { nfserr_serverfault, -ESERVERFAULT },
         };
         int     i;
 
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 67ea83eedd43..171699eb07c8 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -1,6 +1,4 @@
 /*
- * linux/fs/nfsd/nfssvc.c
- *
  * Central processing for nfsd.
  *
  * Authors:     Olaf Kirch (okir@monad.swb.de)
@@ -8,33 +6,19 @@
  * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/module.h>
 #include <linux/sched.h>
-#include <linux/time.h>
-#include <linux/errno.h>
-#include <linux/nfs.h>
-#include <linux/in.h>
-#include <linux/uio.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/smp.h>
 #include <linux/freezer.h>
 #include <linux/fs_struct.h>
-#include <linux/kthread.h>
 #include <linux/swap.h>
 
-#include <linux/sunrpc/types.h>
 #include <linux/sunrpc/stats.h>
-#include <linux/sunrpc/svc.h>
 #include <linux/sunrpc/svcsock.h>
-#include <linux/sunrpc/cache.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/stats.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/syscall.h>
 #include <linux/lockd/bind.h>
 #include <linux/nfsacl.h>
 #include <linux/seq_file.h>
+#include "nfsd.h"
+#include "cache.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY        NFSDDBG_SVC
 
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index afd08e2c90a5..4ce005dbf3e6 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -1,20 +1,10 @@
 /*
- * linux/fs/nfsd/nfsxdr.c
- *
  * XDR support for nfsd
  *
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/types.h>
-#include <linux/time.h>
-#include <linux/nfs.h>
-#include <linux/vfs.h>
-#include <linux/sunrpc/xdr.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/xdr.h>
-#include <linux/mm.h>
+#include "xdr.h"
 #include "auth.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_XDR
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
new file mode 100644
index 000000000000..fefeae27f25e
--- /dev/null
+++ b/fs/nfsd/state.h
@@ -0,0 +1,408 @@
+/*
+ *  Copyright (c) 2001 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Kendrick Smith <kmsmith@umich.edu>
+ *  Andy Adamson <andros@umich.edu>
+ *  
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *  
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _NFSD4_STATE_H
+#define _NFSD4_STATE_H
+
+#include <linux/nfsd/nfsfh.h>
+#include "nfsfh.h"
+
+typedef struct {
+        u32             cl_boot;
+        u32             cl_id;
+} clientid_t;
+
+typedef struct {
+        u32             so_boot;
+        u32             so_stateownerid;
+        u32             so_fileid;
+} stateid_opaque_t;
+
+typedef struct {
+        u32                     si_generation;
+        stateid_opaque_t        si_opaque;
+} stateid_t;
+#define si_boot           si_opaque.so_boot
+#define si_stateownerid   si_opaque.so_stateownerid
+#define si_fileid         si_opaque.so_fileid
+
+#define STATEID_FMT     "(%08x/%08x/%08x/%08x)"
+#define STATEID_VAL(s) \
+        (s)->si_boot, \
+        (s)->si_stateownerid, \
+        (s)->si_fileid, \
+        (s)->si_generation
+
+struct nfsd4_cb_sequence {
+        /* args/res */
+        u32                     cbs_minorversion;
+        struct nfs4_client      *cbs_clp;
+};
+
+struct nfs4_delegation {
+        struct list_head        dl_perfile;
+        struct list_head        dl_perclnt;
+        struct list_head        dl_recall_lru;  /* delegation recalled */
+        atomic_t                dl_count;       /* ref count */
+        struct nfs4_client      *dl_client;
+        struct nfs4_file        *dl_file;
+        struct file_lock        *dl_flock;
+        struct file             *dl_vfs_file;
+        u32                     dl_type;
+        time_t                  dl_time;
+/* For recall: */
+        u32                     dl_ident;
+        stateid_t               dl_stateid;
+        struct knfsd_fh         dl_fh;
+        int                     dl_retries;
+};
+
+/* client delegation callback info */
+struct nfs4_cb_conn {
+        /* SETCLIENTID info */
+        struct sockaddr_storage cb_addr;
+        size_t                  cb_addrlen;
+        u32                     cb_prog;
+        u32                     cb_minorversion;
+        u32                     cb_ident;       /* minorversion 0 only */
+        /* RPC client info */
+        atomic_t                cb_set;     /* successful CB_NULL call */
+        struct rpc_clnt *       cb_client;
+};
+
+/* Maximum number of slots per session. 160 is useful for long haul TCP */
+#define NFSD_MAX_SLOTS_PER_SESSION     160
+/* Maximum number of operations per session compound */
+#define NFSD_MAX_OPS_PER_COMPOUND       16
+/* Maximum  session per slot cache size */
+#define NFSD_SLOT_CACHE_SIZE            1024
+/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
+#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION       32
+#define NFSD_MAX_MEM_PER_SESSION  \
+                (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
+
+struct nfsd4_slot {
+        bool    sl_inuse;
+        bool    sl_cachethis;
+        u16     sl_opcnt;
+        u32     sl_seqid;
+        __be32  sl_status;
+        u32     sl_datalen;
+        char    sl_data[];
+};
+
+struct nfsd4_channel_attrs {
+        u32             headerpadsz;
+        u32             maxreq_sz;
+        u32             maxresp_sz;
+        u32             maxresp_cached;
+        u32             maxops;
+        u32             maxreqs;
+        u32             nr_rdma_attrs;
+        u32             rdma_attrs;
+};
+
+struct nfsd4_create_session {
+        clientid_t                      clientid;
+        struct nfs4_sessionid           sessionid;
+        u32                             seqid;
+        u32                             flags;
+        struct nfsd4_channel_attrs      fore_channel;
+        struct nfsd4_channel_attrs      back_channel;
+        u32                             callback_prog;
+        u32                             uid;
+        u32                             gid;
+};
+
+/* The single slot clientid cache structure */
+struct nfsd4_clid_slot {
+        u32                             sl_seqid;
+        __be32                          sl_status;
+        struct nfsd4_create_session     sl_cr_ses;
+};
+
+struct nfsd4_session {
+        struct kref             se_ref;
+        struct list_head        se_hash;        /* hash by sessionid */
+        struct list_head        se_perclnt;
+        u32                     se_flags;
+        struct nfs4_client      *se_client;     /* for expire_client */
+        struct nfs4_sessionid   se_sessionid;
+        struct nfsd4_channel_attrs se_fchannel;
+        struct nfsd4_channel_attrs se_bchannel;
+        struct nfsd4_slot       *se_slots[];    /* forward channel slots */
+};
+
+static inline void
+nfsd4_put_session(struct nfsd4_session *ses)
+{
+        extern void free_session(struct kref *kref);
+        kref_put(&ses->se_ref, free_session);
+}
+
+static inline void
+nfsd4_get_session(struct nfsd4_session *ses)
+{
+        kref_get(&ses->se_ref);
+}
+
+/* formatted contents of nfs4_sessionid */
+struct nfsd4_sessionid {
+        clientid_t      clientid;
+        u32             sequence;
+        u32             reserved;
+};
+
+#define HEXDIR_LEN     33 /* hex version of 16 byte md5 of cl_name plus '\0' */
+
+/*
+ * struct nfs4_client - one per client.  Clientids live here.
+ *      o Each nfs4_client is hashed by clientid.
+ *
+ *      o Each nfs4_clients is also hashed by name 
+ *        (the opaque quantity initially sent by the client to identify itself).
+ *        
+ *      o cl_perclient list is used to ensure no dangling stateowner references
+ *        when we expire the nfs4_client
+ */
+struct nfs4_client {
+        struct list_head        cl_idhash;      /* hash by cl_clientid.id */
+        struct list_head        cl_strhash;     /* hash by cl_name */
+        struct list_head        cl_openowners;
+        struct list_head        cl_delegations;
+        struct list_head        cl_lru;         /* tail queue */
+        struct xdr_netobj       cl_name;        /* id generated by client */
+        char                    cl_recdir[HEXDIR_LEN]; /* recovery dir */
+        nfs4_verifier           cl_verifier;    /* generated by client */
+        time_t                  cl_time;        /* time of last lease renewal */
+        struct sockaddr_storage cl_addr;        /* client ipaddress */
+        u32                     cl_flavor;      /* setclientid pseudoflavor */
+        char                    *cl_principal;  /* setclientid principal name */
+        struct svc_cred         cl_cred;        /* setclientid principal */
+        clientid_t              cl_clientid;    /* generated by server */
+        nfs4_verifier           cl_confirm;     /* generated by server */
+        struct nfs4_cb_conn     cl_cb_conn;     /* callback info */
+        atomic_t                cl_count;       /* ref count */
+        u32                     cl_firststate;  /* recovery dir creation */
+
+        /* for nfs41 */
+        struct list_head        cl_sessions;
+        struct nfsd4_clid_slot  cl_cs_slot;     /* create_session slot */
+        u32                     cl_exchange_flags;
+        struct nfs4_sessionid   cl_sessionid;
+
+        /* for nfs41 callbacks */
+        /* We currently support a single back channel with a single slot */
+        unsigned long           cl_cb_slot_busy;
+        u32                     cl_cb_seq_nr;
+        struct svc_xprt         *cl_cb_xprt;    /* 4.1 callback transport */
+        struct rpc_wait_queue   cl_cb_waitq;    /* backchannel callers may */
+                                                /* wait here for slots */
+};
+
+/* struct nfs4_client_reset
+ * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
+ * upon lease reset, or from upcall to state_daemon (to read in state
+ * from non-volitile storage) upon reboot.
+ */
+struct nfs4_client_reclaim {
+        struct list_head        cr_strhash;     /* hash by cr_name */
+        char                    cr_recdir[HEXDIR_LEN]; /* recover dir */
+};
+
+static inline void
+update_stateid(stateid_t *stateid)
+{
+        stateid->si_generation++;
+}
+
+/* A reasonable value for REPLAY_ISIZE was estimated as follows:  
+ * The OPEN response, typically the largest, requires 
+ *   4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) +  8(verifier) + 
+ *   4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) + 
+ *   20(deleg. space limit) + ~32(deleg. ace) = 112 bytes 
+ */
+
+#define NFSD4_REPLAY_ISIZE       112 
+
+/*
+ * Replay buffer, where the result of the last seqid-mutating operation 
+ * is cached. 
+ */
+struct nfs4_replay {
+        __be32                  rp_status;
+        unsigned int            rp_buflen;
+        char                    *rp_buf;
+        unsigned                intrp_allocated;
+        struct knfsd_fh         rp_openfh;
+        char                    rp_ibuf[NFSD4_REPLAY_ISIZE];
+};
+
+/*
+* nfs4_stateowner can either be an open_owner, or a lock_owner
+*
+*    so_idhash:  stateid_hashtbl[] for open owner, lockstateid_hashtbl[]
+*         for lock_owner
+*    so_strhash: ownerstr_hashtbl[] for open_owner, lock_ownerstr_hashtbl[]
+*         for lock_owner
+*    so_perclient: nfs4_client->cl_perclient entry - used when nfs4_client
+*         struct is reaped.
+*    so_perfilestate: heads the list of nfs4_stateid (either open or lock) 
+*         and is used to ensure no dangling nfs4_stateid references when we 
+*         release a stateowner.
+*    so_perlockowner: (open) nfs4_stateid->st_perlockowner entry - used when
+*         close is called to reap associated byte-range locks
+*    so_close_lru: (open) stateowner is placed on this list instead of being
+*         reaped (when so_perfilestate is empty) to hold the last close replay.
+*         reaped by laundramat thread after lease period.
+*/
+struct nfs4_stateowner {
+        struct kref             so_ref;
+        struct list_head        so_idhash;   /* hash by so_id */
+        struct list_head        so_strhash;   /* hash by op_name */
+        struct list_head        so_perclient;
+        struct list_head        so_stateids;
+        struct list_head        so_perstateid; /* for lockowners only */
+        struct list_head        so_close_lru; /* tail queue */
+        time_t                  so_time; /* time of placement on so_close_lru */
+        int                     so_is_open_owner; /* 1=openowner,0=lockowner */
+        u32                     so_id;
+        struct nfs4_client *    so_client;
+        /* after increment in ENCODE_SEQID_OP_TAIL, represents the next
+         * sequence id expected from the client: */
+        u32                     so_seqid;
+        struct xdr_netobj       so_owner;     /* open owner name */
+        int                     so_confirmed; /* successful OPEN_CONFIRM? */
+        struct nfs4_replay      so_replay;
+};
+
+/*
+*  nfs4_file: a file opened by some number of (open) nfs4_stateowners.
+*    o fi_perfile list is used to search for conflicting 
+*      share_acces, share_deny on the file.
+*/
+struct nfs4_file {
+        atomic_t                fi_ref;
+        struct list_head        fi_hash;    /* hash by "struct inode *" */
+        struct list_head        fi_stateids;
+        struct list_head        fi_delegations;
+        struct inode            *fi_inode;
+        u32                     fi_id;      /* used with stateowner->so_id 
+                                             * for stateid_hashtbl hash */
+        bool                    fi_had_conflict;
+};
+
+/*
+* nfs4_stateid can either be an open stateid or (eventually) a lock stateid
+*
+* (open)nfs4_stateid: one per (open)nfs4_stateowner, nfs4_file
+*
+*       st_hash: stateid_hashtbl[] entry or lockstateid_hashtbl entry
+*       st_perfile: file_hashtbl[] entry.
+*       st_perfile_state: nfs4_stateowner->so_perfilestate
+*       st_perlockowner: (open stateid) list of lock nfs4_stateowners
+*       st_access_bmap: used only for open stateid
+*       st_deny_bmap: used only for open stateid
+*       st_openstp: open stateid lock stateid was derived from
+*
+* XXX: open stateids and lock stateids have diverged sufficiently that
+* we should consider defining separate structs for the two cases.
+*/
+
+struct nfs4_stateid {
+        struct list_head              st_hash; 
+        struct list_head              st_perfile;
+        struct list_head              st_perstateowner;
+        struct list_head              st_lockowners;
+        struct nfs4_stateowner      * st_stateowner;
+        struct nfs4_file            * st_file;
+        stateid_t                     st_stateid;
+        struct file                 * st_vfs_file;
+        unsigned long                 st_access_bmap;
+        unsigned long                 st_deny_bmap;
+        struct nfs4_stateid         * st_openstp;
+};
+
+/* flags for preprocess_seqid_op() */
+#define HAS_SESSION             0x00000001
+#define CONFIRM                 0x00000002
+#define OPEN_STATE              0x00000004
+#define LOCK_STATE              0x00000008
+#define RD_STATE                0x00000010
+#define WR_STATE                0x00000020
+#define CLOSE_STATE             0x00000040
+
+#define seqid_mutating_err(err)                       \
+        (((err) != nfserr_stale_clientid) &&    \
+        ((err) != nfserr_bad_seqid) &&          \
+        ((err) != nfserr_stale_stateid) &&      \
+        ((err) != nfserr_bad_stateid))
+
+struct nfsd4_compound_state;
+
+extern __be32 nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
+                stateid_t *stateid, int flags, struct file **filp);
+extern void nfs4_lock_state(void);
+extern void nfs4_unlock_state(void);
+extern int nfs4_in_grace(void);
+extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
+extern void put_nfs4_client(struct nfs4_client *clp);
+extern void nfs4_free_stateowner(struct kref *kref);
+extern int set_callback_cred(void);
+extern void nfsd4_probe_callback(struct nfs4_client *clp);
+extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
+extern void nfs4_put_delegation(struct nfs4_delegation *dp);
+extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
+extern void nfsd4_init_recdir(char *recdir_name);
+extern int nfsd4_recdir_load(void);
+extern void nfsd4_shutdown_recdir(void);
+extern int nfs4_client_to_reclaim(const char *name);
+extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
+extern void nfsd4_recdir_purge_old(void);
+extern int nfsd4_create_clid_dir(struct nfs4_client *clp);
+extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
+
+static inline void
+nfs4_put_stateowner(struct nfs4_stateowner *so)
+{
+        kref_put(&so->so_ref, nfs4_free_stateowner);
+}
+
+static inline void
+nfs4_get_stateowner(struct nfs4_stateowner *so)
+{
+        kref_get(&so->so_ref);
+}
+
+#endif   /* NFSD4_STATE_H */
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index 71944cddf680..5232d3e8fb2f 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -1,6 +1,4 @@
 /*
- * linux/fs/nfsd/stats.c
- *
  * procfs-based user access to knfsd statistics
  *
  * /proc/net/rpc/nfsd
@@ -23,18 +21,13 @@
  * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
  */
 
-#include <linux/kernel.h>
-#include <linux/time.h>
-#include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-#include <linux/stat.h>
 #include <linux/module.h>
-
-#include <linux/sunrpc/svc.h>
 #include <linux/sunrpc/stats.h>
-#include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/stats.h>
 
+#include "nfsd.h"
+
 struct nfsd_stats       nfsdstats;
 struct svc_stat         nfsd_svcstats = {
         .program        = &nfsd_program,
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index a293f0273263..e3ef3ec0efd0 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1,7 +1,5 @@
 #define MSNFS   /* HACK HACK */
 /*
- * linux/fs/nfsd/vfs.c
- *
  * File operations used by nfsd. Some of these have been ripped from
  * other parts of the kernel because they weren't exported, others
  * are partial duplicates with added or changed functionality.
@@ -16,48 +14,31 @@
  * Zerocpy NFS support (C) 2002 Hirokazu Takahashi <taka@valinux.co.jp>
  */
 
-#include <linux/string.h>
-#include <linux/time.h>
-#include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/file.h>
-#include <linux/mount.h>
-#include <linux/major.h>
 #include <linux/splice.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
 #include <linux/fcntl.h>
-#include <linux/net.h>
-#include <linux/unistd.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include <linux/in.h>
-#include <linux/module.h>
 #include <linux/namei.h>
-#include <linux/vfs.h>
 #include <linux/delay.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#ifdef CONFIG_NFSD_V3
-#include <linux/nfs3.h>
-#include <linux/nfsd/xdr3.h>
-#endif /* CONFIG_NFSD_V3 */
-#include <linux/nfsd/nfsfh.h>
 #include <linux/quotaops.h>
 #include <linux/fsnotify.h>
-#include <linux/posix_acl.h>
 #include <linux/posix_acl_xattr.h>
 #include <linux/xattr.h>
+#include <linux/jhash.h>
+#include <linux/ima.h>
+#include <asm/uaccess.h>
+
+#ifdef CONFIG_NFSD_V3
+#include "xdr3.h"
+#endif /* CONFIG_NFSD_V3 */
+
 #ifdef CONFIG_NFSD_V4
-#include <linux/nfs4.h>
 #include <linux/nfs4_acl.h>
 #include <linux/nfsd_idmap.h>
-#include <linux/security.h>
 #endif /* CONFIG_NFSD_V4 */
-#include <linux/jhash.h>
-#include <linux/ima.h>
 
-#include <asm/uaccess.h>
+#include "nfsd.h"
+#include "vfs.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_FILEOP
 
@@ -89,12 +70,6 @@ struct raparm_hbucket {
 #define RAPARM_HASH_MASK        (RAPARM_HASH_SIZE-1)
 static struct raparm_hbucket    raparm_hash[RAPARM_HASH_SIZE];
 
-static inline int
-nfsd_v4client(struct svc_rqst *rq)
-{
-    return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
-}
-
 /* 
  * Called from nfsd_lookup and encode_dirent. Check if we have crossed 
  * a mount point.
@@ -116,8 +91,16 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
 
         exp2 = rqst_exp_get_by_name(rqstp, &path);
         if (IS_ERR(exp2)) {
-                if (PTR_ERR(exp2) != -ENOENT)
-                        err = PTR_ERR(exp2);
+                err = PTR_ERR(exp2);
+                /*
+                 * We normally allow NFS clients to continue
+                 * "underneath" a mountpoint that is not exported.
+                 * The exception is V4ROOT, where no traversal is ever
+                 * allowed without an explicit export of the new
+                 * directory.
+                 */
+                if (err == -ENOENT && !(exp->ex_flags & NFSEXP_V4ROOT))
+                        err = 0;
                 path_put(&path);
                 goto out;
         }
@@ -141,6 +124,53 @@ out:
         return err;
 }
 
+static void follow_to_parent(struct path *path)
+{
+        struct dentry *dp;
+
+        while (path->dentry == path->mnt->mnt_root && follow_up(path))
+                ;
+        dp = dget_parent(path->dentry);
+        dput(path->dentry);
+        path->dentry = dp;
+}
+
+static int nfsd_lookup_parent(struct svc_rqst *rqstp, struct dentry *dparent, struct svc_export **exp, struct dentry **dentryp)
+{
+        struct svc_export *exp2;
+        struct path path = {.mnt = mntget((*exp)->ex_path.mnt),
+                            .dentry = dget(dparent)};
+
+        follow_to_parent(&path);
+
+        exp2 = rqst_exp_parent(rqstp, &path);
+        if (PTR_ERR(exp2) == -ENOENT) {
+                *dentryp = dget(dparent);
+        } else if (IS_ERR(exp2)) {
+                path_put(&path);
+                return PTR_ERR(exp2);
+        } else {
+                *dentryp = dget(path.dentry);
+                exp_put(*exp);
+                *exp = exp2;
+        }
+        path_put(&path);
+        return 0;
+}
+
+/*
+ * For nfsd purposes, we treat V4ROOT exports as though there was an
+ * export at *every* directory.
+ */
+int nfsd_mountpoint(struct dentry *dentry, struct svc_export *exp)
+{
+        if (d_mountpoint(dentry))
+                return 1;
+        if (!(exp->ex_flags & NFSEXP_V4ROOT))
+                return 0;
+        return dentry->d_inode != NULL;
+}
+
 __be32
 nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
                    const char *name, unsigned int len,
@@ -169,35 +199,13 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
                         dentry = dget(dparent);
                 else if (dparent != exp->ex_path.dentry)
                         dentry = dget_parent(dparent);
-                else if (!EX_NOHIDE(exp))
+                else if (!EX_NOHIDE(exp) && !nfsd_v4client(rqstp))
                         dentry = dget(dparent); /* .. == . just like at / */
                 else {
                         /* checking mountpoint crossing is very different when stepping up */
-                        struct svc_export *exp2 = NULL;
-                        struct dentry *dp;
-                        struct path path = {.mnt = mntget(exp->ex_path.mnt),
-                                            .dentry = dget(dparent)};
-
-                        while (path.dentry == path.mnt->mnt_root &&
-                               follow_up(&path))
-                                ;
-                        dp = dget_parent(path.dentry);
-                        dput(path.dentry);
-                        path.dentry = dp;
-
-                        exp2 = rqst_exp_parent(rqstp, &path);
-                        if (PTR_ERR(exp2) == -ENOENT) {
-                                dentry = dget(dparent);
-                        } else if (IS_ERR(exp2)) {
-                                host_err = PTR_ERR(exp2);
-                                path_put(&path);
+                        host_err = nfsd_lookup_parent(rqstp, dparent, &exp, &dentry);
+                        if (host_err)
                                 goto out_nfserr;
-                        } else {
-                                dentry = dget(path.dentry);
-                                exp_put(exp);
-                                exp = exp2;
-                        }
-                        path_put(&path);
                 }
         } else {
                 fh_lock(fhp);
@@ -208,7 +216,7 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
                 /*
                  * check if we have crossed a mount point ...
                  */
-                if (d_mountpoint(dentry)) {
+                if (nfsd_mountpoint(dentry, exp)) {
                         if ((host_err = nfsd_cross_mnt(rqstp, &dentry, &exp))) {
                                 dput(dentry);
                                 goto out_nfserr;
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
new file mode 100644
index 000000000000..4b1de0a9ea75
--- /dev/null
+++ b/fs/nfsd/vfs.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef LINUX_NFSD_VFS_H
+#define LINUX_NFSD_VFS_H
+
+#include "nfsfh.h"
+
+/*
+ * Flags for nfsd_permission
+ */
+#define NFSD_MAY_NOP            0
+#define NFSD_MAY_EXEC           1 /* == MAY_EXEC */
+#define NFSD_MAY_WRITE          2 /* == MAY_WRITE */
+#define NFSD_MAY_READ           4 /* == MAY_READ */
+#define NFSD_MAY_SATTR          8
+#define NFSD_MAY_TRUNC          16
+#define NFSD_MAY_LOCK           32
+#define NFSD_MAY_OWNER_OVERRIDE 64
+#define NFSD_MAY_LOCAL_ACCESS   128 /* IRIX doing local access check on device special file*/
+#define NFSD_MAY_BYPASS_GSS_ON_ROOT 256
+
+#define NFSD_MAY_CREATE         (NFSD_MAY_EXEC|NFSD_MAY_WRITE)
+#define NFSD_MAY_REMOVE         (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)
+
+/*
+ * Callback function for readdir
+ */
+typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
+
+/* nfsd/vfs.c */
+int             fh_lock_parent(struct svc_fh *, struct dentry *);
+int             nfsd_racache_init(int);
+void            nfsd_racache_shutdown(void);
+int             nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
+                                struct svc_export **expp);
+__be32          nfsd_lookup(struct svc_rqst *, struct svc_fh *,
+                                const char *, unsigned int, struct svc_fh *);
+__be32           nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
+                                const char *, unsigned int,
+                                struct svc_export **, struct dentry **);
+__be32          nfsd_setattr(struct svc_rqst *, struct svc_fh *,
+                                struct iattr *, int, time_t);
+int nfsd_mountpoint(struct dentry *, struct svc_export *);
+#ifdef CONFIG_NFSD_V4
+__be32          nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *,
+                    struct nfs4_acl *);
+int             nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **);
+#endif /* CONFIG_NFSD_V4 */
+__be32          nfsd_create(struct svc_rqst *, struct svc_fh *,
+                                char *name, int len, struct iattr *attrs,
+                                int type, dev_t rdev, struct svc_fh *res);
+#ifdef CONFIG_NFSD_V3
+__be32          nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
+__be32          nfsd_create_v3(struct svc_rqst *, struct svc_fh *,
+                                char *name, int len, struct iattr *attrs,
+                                struct svc_fh *res, int createmode,
+                                u32 *verifier, int *truncp, int *created);
+__be32          nfsd_commit(struct svc_rqst *, struct svc_fh *,
+                                loff_t, unsigned long);
+#endif /* CONFIG_NFSD_V3 */
+__be32          nfsd_open(struct svc_rqst *, struct svc_fh *, int,
+                                int, struct file **);
+void            nfsd_close(struct file *);
+__be32          nfsd_read(struct svc_rqst *, struct svc_fh *, struct file *,
+                                loff_t, struct kvec *, int, unsigned long *);
+__be32          nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
+                                loff_t, struct kvec *,int, unsigned long *, int *);
+__be32          nfsd_readlink(struct svc_rqst *, struct svc_fh *,
+                                char *, int *);
+__be32          nfsd_symlink(struct svc_rqst *, struct svc_fh *,
+                                char *name, int len, char *path, int plen,
+                                struct svc_fh *res, struct iattr *);
+__be32          nfsd_link(struct svc_rqst *, struct svc_fh *,
+                                char *, int, struct svc_fh *);
+__be32          nfsd_rename(struct svc_rqst *,
+                                struct svc_fh *, char *, int,
+                                struct svc_fh *, char *, int);
+__be32          nfsd_remove(struct svc_rqst *,
+                                struct svc_fh *, char *, int);
+__be32          nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
+                                char *name, int len);
+int             nfsd_truncate(struct svc_rqst *, struct svc_fh *,
+                                unsigned long size);
+__be32          nfsd_readdir(struct svc_rqst *, struct svc_fh *,
+                             loff_t *, struct readdir_cd *, filldir_t);
+__be32          nfsd_statfs(struct svc_rqst *, struct svc_fh *,
+                                struct kstatfs *, int access);
+
+int             nfsd_notify_change(struct inode *, struct iattr *);
+__be32          nfsd_permission(struct svc_rqst *, struct svc_export *,
+                                struct dentry *, int);
+int             nfsd_sync_dir(struct dentry *dp);
+
+#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
+struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
+int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
+#endif
+
+#endif /* LINUX_NFSD_VFS_H */
diff --git a/fs/nfsd/xdr.h b/fs/nfsd/xdr.h
new file mode 100644
index 000000000000..53b1863dd8f6
--- /dev/null
+++ b/fs/nfsd/xdr.h
@@ -0,0 +1,173 @@
+/* XDR types for nfsd. This is mainly a typing exercise. */
+
+#ifndef LINUX_NFSD_H
+#define LINUX_NFSD_H
+
+#include <linux/vfs.h>
+#include "nfsd.h"
+#include "nfsfh.h"
+
+struct nfsd_fhandle {
+        struct svc_fh           fh;
+};
+
+struct nfsd_sattrargs {
+        struct svc_fh           fh;
+        struct iattr            attrs;
+};
+
+struct nfsd_diropargs {
+        struct svc_fh           fh;
+        char *                  name;
+        unsigned int            len;
+};
+
+struct nfsd_readargs {
+        struct svc_fh           fh;
+        __u32                   offset;
+        __u32                   count;
+        int                     vlen;
+};
+
+struct nfsd_writeargs {
+        svc_fh                  fh;
+        __u32                   offset;
+        int                     len;
+        int                     vlen;
+};
+
+struct nfsd_createargs {
+        struct svc_fh           fh;
+        char *                  name;
+        unsigned int            len;
+        struct iattr            attrs;
+};
+
+struct nfsd_renameargs {
+        struct svc_fh           ffh;
+        char *                  fname;
+        unsigned int            flen;
+        struct svc_fh           tfh;
+        char *                  tname;
+        unsigned int            tlen;
+};
+
+struct nfsd_readlinkargs {
+        struct svc_fh           fh;
+        char *                  buffer;
+};
+        
+struct nfsd_linkargs {
+        struct svc_fh           ffh;
+        struct svc_fh           tfh;
+        char *                  tname;
+        unsigned int            tlen;
+};
+
+struct nfsd_symlinkargs {
+        struct svc_fh           ffh;
+        char *                  fname;
+        unsigned int            flen;
+        char *                  tname;
+        unsigned int            tlen;
+        struct iattr            attrs;
+};
+
+struct nfsd_readdirargs {
+        struct svc_fh           fh;
+        __u32                   cookie;
+        __u32                   count;
+        __be32 *                buffer;
+};
+
+struct nfsd_attrstat {
+        struct svc_fh           fh;
+        struct kstat            stat;
+};
+
+struct nfsd_diropres  {
+        struct svc_fh           fh;
+        struct kstat            stat;
+};
+
+struct nfsd_readlinkres {
+        int                     len;
+};
+
+struct nfsd_readres {
+        struct svc_fh           fh;
+        unsigned long           count;
+        struct kstat            stat;
+};
+
+struct nfsd_readdirres {
+        int                     count;
+
+        struct readdir_cd       common;
+        __be32 *                buffer;
+        int                     buflen;
+        __be32 *                offset;
+};
+
+struct nfsd_statfsres {
+        struct kstatfs          stats;
+};
+
+/*
+ * Storage requirements for XDR arguments and results.
+ */
+union nfsd_xdrstore {
+        struct nfsd_sattrargs   sattr;
+        struct nfsd_diropargs   dirop;
+        struct nfsd_readargs    read;
+        struct nfsd_writeargs   write;
+        struct nfsd_createargs  create;
+        struct nfsd_renameargs  rename;
+        struct nfsd_linkargs    link;
+        struct nfsd_symlinkargs symlink;
+        struct nfsd_readdirargs readdir;
+};
+
+#define NFS2_SVC_XDRSIZE        sizeof(union nfsd_xdrstore)
+
+
+int nfssvc_decode_void(struct svc_rqst *, __be32 *, void *);
+int nfssvc_decode_fhandle(struct svc_rqst *, __be32 *, struct nfsd_fhandle *);
+int nfssvc_decode_sattrargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_sattrargs *);
+int nfssvc_decode_diropargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_diropargs *);
+int nfssvc_decode_readargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_readargs *);
+int nfssvc_decode_writeargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_writeargs *);
+int nfssvc_decode_createargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_createargs *);
+int nfssvc_decode_renameargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_renameargs *);
+int nfssvc_decode_readlinkargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_readlinkargs *);
+int nfssvc_decode_linkargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_linkargs *);
+int nfssvc_decode_symlinkargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_symlinkargs *);
+int nfssvc_decode_readdirargs(struct svc_rqst *, __be32 *,
+                                struct nfsd_readdirargs *);
+int nfssvc_encode_void(struct svc_rqst *, __be32 *, void *);
+int nfssvc_encode_attrstat(struct svc_rqst *, __be32 *, struct nfsd_attrstat *);
+int nfssvc_encode_diropres(struct svc_rqst *, __be32 *, struct nfsd_diropres *);
+int nfssvc_encode_readlinkres(struct svc_rqst *, __be32 *, struct nfsd_readlinkres *);
+int nfssvc_encode_readres(struct svc_rqst *, __be32 *, struct nfsd_readres *);
+int nfssvc_encode_statfsres(struct svc_rqst *, __be32 *, struct nfsd_statfsres *);
+int nfssvc_encode_readdirres(struct svc_rqst *, __be32 *, struct nfsd_readdirres *);
+
+int nfssvc_encode_entry(void *, const char *name,
+                        int namlen, loff_t offset, u64 ino, unsigned int);
+
+int nfssvc_release_fhandle(struct svc_rqst *, __be32 *, struct nfsd_fhandle *);
+
+/* Helper functions for NFSv2 ACL code */
+__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp);
+__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp);
+
+#endif /* LINUX_NFSD_H */
diff --git a/fs/nfsd/xdr3.h b/fs/nfsd/xdr3.h
new file mode 100644
index 000000000000..7df980eb0562
--- /dev/null
+++ b/fs/nfsd/xdr3.h
@@ -0,0 +1,344 @@
+/*
+ * XDR types for NFSv3 in nfsd.
+ *
+ * Copyright (C) 1996-1998, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _LINUX_NFSD_XDR3_H
+#define _LINUX_NFSD_XDR3_H
+
+#include "xdr.h"
+
+struct nfsd3_sattrargs {
+        struct svc_fh           fh;
+        struct iattr            attrs;
+        int                     check_guard;
+        time_t                  guardtime;
+};
+
+struct nfsd3_diropargs {
+        struct svc_fh           fh;
+        char *                  name;
+        unsigned int            len;
+};
+
+struct nfsd3_accessargs {
+        struct svc_fh           fh;
+        unsigned int            access;
+};
+
+struct nfsd3_readargs {
+        struct svc_fh           fh;
+        __u64                   offset;
+        __u32                   count;
+        int                     vlen;
+};
+
+struct nfsd3_writeargs {
+        svc_fh                  fh;
+        __u64                   offset;
+        __u32                   count;
+        int                     stable;
+        __u32                   len;
+        int                     vlen;
+};
+
+struct nfsd3_createargs {
+        struct svc_fh           fh;
+        char *                  name;
+        unsigned int            len;
+        int                     createmode;
+        struct iattr            attrs;
+        __be32 *                verf;
+};
+
+struct nfsd3_mknodargs {
+        struct svc_fh           fh;
+        char *                  name;
+        unsigned int            len;
+        __u32                   ftype;
+        __u32                   major, minor;
+        struct iattr            attrs;
+};
+
+struct nfsd3_renameargs {
+        struct svc_fh           ffh;
+        char *                  fname;
+        unsigned int            flen;
+        struct svc_fh           tfh;
+        char *                  tname;
+        unsigned int            tlen;
+};
+
+struct nfsd3_readlinkargs {
+        struct svc_fh           fh;
+        char *                  buffer;
+};
+
+struct nfsd3_linkargs {
+        struct svc_fh           ffh;
+        struct svc_fh           tfh;
+        char *                  tname;
+        unsigned int            tlen;
+};
+
+struct nfsd3_symlinkargs {
+        struct svc_fh           ffh;
+        char *                  fname;
+        unsigned int            flen;
+        char *                  tname;
+        unsigned int            tlen;
+        struct iattr            attrs;
+};
+
+struct nfsd3_readdirargs {
+        struct svc_fh           fh;
+        __u64                   cookie;
+        __u32                   dircount;
+        __u32                   count;
+        __be32 *                verf;
+        __be32 *                buffer;
+};
+
+struct nfsd3_commitargs {
+        struct svc_fh           fh;
+        __u64                   offset;
+        __u32                   count;
+};
+
+struct nfsd3_getaclargs {
+        struct svc_fh           fh;
+        int                     mask;
+};
+
+struct posix_acl;
+struct nfsd3_setaclargs {
+        struct svc_fh           fh;
+        int                     mask;
+        struct posix_acl        *acl_access;
+        struct posix_acl        *acl_default;
+};
+
+struct nfsd3_attrstat {
+        __be32                  status;
+        struct svc_fh           fh;
+        struct kstat            stat;
+};
+
+/* LOOKUP, CREATE, MKDIR, SYMLINK, MKNOD */
+struct nfsd3_diropres  {
+        __be32                  status;
+        struct svc_fh           dirfh;
+        struct svc_fh           fh;
+};
+
+struct nfsd3_accessres {
+        __be32                  status;
+        struct svc_fh           fh;
+        __u32                   access;
+};
+
+struct nfsd3_readlinkres {
+        __be32                  status;
+        struct svc_fh           fh;
+        __u32                   len;
+};
+
+struct nfsd3_readres {
+        __be32                  status;
+        struct svc_fh           fh;
+        unsigned long           count;
+        int                     eof;
+};
+
+struct nfsd3_writeres {
+        __be32                  status;
+        struct svc_fh           fh;
+        unsigned long           count;
+        int                     committed;
+};
+
+struct nfsd3_renameres {
+        __be32                  status;
+        struct svc_fh           ffh;
+        struct svc_fh           tfh;
+};
+
+struct nfsd3_linkres {
+        __be32                  status;
+        struct svc_fh           tfh;
+        struct svc_fh           fh;
+};
+
+struct nfsd3_readdirres {
+        __be32                  status;
+        struct svc_fh           fh;
+        int                     count;
+        __be32                  verf[2];
+
+        struct readdir_cd       common;
+        __be32 *                buffer;
+        int                     buflen;
+        __be32 *                offset;
+        __be32 *                offset1;
+        struct svc_rqst *       rqstp;
+
+};
+
+struct nfsd3_fsstatres {
+        __be32                  status;
+        struct kstatfs          stats;
+        __u32                   invarsec;
+};
+
+struct nfsd3_fsinfores {
+        __be32                  status;
+        __u32                   f_rtmax;
+        __u32                   f_rtpref;
+        __u32                   f_rtmult;
+        __u32                   f_wtmax;
+        __u32                   f_wtpref;
+        __u32                   f_wtmult;
+        __u32                   f_dtpref;
+        __u64                   f_maxfilesize;
+        __u32                   f_properties;
+};
+
+struct nfsd3_pathconfres {
+        __be32                  status;
+        __u32                   p_link_max;
+        __u32                   p_name_max;
+        __u32                   p_no_trunc;
+        __u32                   p_chown_restricted;
+        __u32                   p_case_insensitive;
+        __u32                   p_case_preserving;
+};
+
+struct nfsd3_commitres {
+        __be32                  status;
+        struct svc_fh           fh;
+};
+
+struct nfsd3_getaclres {
+        __be32                  status;
+        struct svc_fh           fh;
+        int                     mask;
+        struct posix_acl        *acl_access;
+        struct posix_acl        *acl_default;
+};
+
+/* dummy type for release */
+struct nfsd3_fhandle_pair {
+        __u32                   dummy;
+        struct svc_fh           fh1;
+        struct svc_fh           fh2;
+};
+
+/*
+ * Storage requirements for XDR arguments and results.
+ */
+union nfsd3_xdrstore {
+        struct nfsd3_sattrargs          sattrargs;
+        struct nfsd3_diropargs          diropargs;
+        struct nfsd3_readargs           readargs;
+        struct nfsd3_writeargs          writeargs;
+        struct nfsd3_createargs         createargs;
+        struct nfsd3_renameargs         renameargs;
+        struct nfsd3_linkargs           linkargs;
+        struct nfsd3_symlinkargs        symlinkargs;
+        struct nfsd3_readdirargs        readdirargs;
+        struct nfsd3_diropres           diropres;
+        struct nfsd3_accessres          accessres;
+        struct nfsd3_readlinkres        readlinkres;
+        struct nfsd3_readres            readres;
+        struct nfsd3_writeres           writeres;
+        struct nfsd3_renameres          renameres;
+        struct nfsd3_linkres            linkres;
+        struct nfsd3_readdirres         readdirres;
+        struct nfsd3_fsstatres          fsstatres;
+        struct nfsd3_fsinfores          fsinfores;
+        struct nfsd3_pathconfres        pathconfres;
+        struct nfsd3_commitres          commitres;
+        struct nfsd3_getaclres          getaclres;
+};
+
+#define NFS3_SVC_XDRSIZE                sizeof(union nfsd3_xdrstore)
+
+int nfs3svc_decode_fhandle(struct svc_rqst *, __be32 *, struct nfsd_fhandle *);
+int nfs3svc_decode_sattrargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_sattrargs *);
+int nfs3svc_decode_diropargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_diropargs *);
+int nfs3svc_decode_accessargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_accessargs *);
+int nfs3svc_decode_readargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_readargs *);
+int nfs3svc_decode_writeargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_writeargs *);
+int nfs3svc_decode_createargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_createargs *);
+int nfs3svc_decode_mkdirargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_createargs *);
+int nfs3svc_decode_mknodargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_mknodargs *);
+int nfs3svc_decode_renameargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_renameargs *);
+int nfs3svc_decode_readlinkargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_readlinkargs *);
+int nfs3svc_decode_linkargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_linkargs *);
+int nfs3svc_decode_symlinkargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_symlinkargs *);
+int nfs3svc_decode_readdirargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_readdirargs *);
+int nfs3svc_decode_readdirplusargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_readdirargs *);
+int nfs3svc_decode_commitargs(struct svc_rqst *, __be32 *,
+                                struct nfsd3_commitargs *);
+int nfs3svc_encode_voidres(struct svc_rqst *, __be32 *, void *);
+int nfs3svc_encode_attrstat(struct svc_rqst *, __be32 *,
+                                struct nfsd3_attrstat *);
+int nfs3svc_encode_wccstat(struct svc_rqst *, __be32 *,
+                                struct nfsd3_attrstat *);
+int nfs3svc_encode_diropres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_diropres *);
+int nfs3svc_encode_accessres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_accessres *);
+int nfs3svc_encode_readlinkres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_readlinkres *);
+int nfs3svc_encode_readres(struct svc_rqst *, __be32 *, struct nfsd3_readres *);
+int nfs3svc_encode_writeres(struct svc_rqst *, __be32 *, struct nfsd3_writeres *);
+int nfs3svc_encode_createres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_diropres *);
+int nfs3svc_encode_renameres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_renameres *);
+int nfs3svc_encode_linkres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_linkres *);
+int nfs3svc_encode_readdirres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_readdirres *);
+int nfs3svc_encode_fsstatres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_fsstatres *);
+int nfs3svc_encode_fsinfores(struct svc_rqst *, __be32 *,
+                                struct nfsd3_fsinfores *);
+int nfs3svc_encode_pathconfres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_pathconfres *);
+int nfs3svc_encode_commitres(struct svc_rqst *, __be32 *,
+                                struct nfsd3_commitres *);
+
+int nfs3svc_release_fhandle(struct svc_rqst *, __be32 *,
+                                struct nfsd3_attrstat *);
+int nfs3svc_release_fhandle2(struct svc_rqst *, __be32 *,
+                                struct nfsd3_fhandle_pair *);
+int nfs3svc_encode_entry(void *, const char *name,
+                                int namlen, loff_t offset, u64 ino,
+                                unsigned int);
+int nfs3svc_encode_entry_plus(void *, const char *name,
+                                int namlen, loff_t offset, u64 ino,
+                                unsigned int);
+/* Helper functions for NFSv3 ACL code */
+__be32 *nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p,
+                                struct svc_fh *fhp);
+__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp);
+
+
+#endif /* _LINUX_NFSD_XDR3_H */
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
new file mode 100644
index 000000000000..efa337739534
--- /dev/null
+++ b/fs/nfsd/xdr4.h
@@ -0,0 +1,562 @@
+/*
+ *  Server-side types for NFSv4.
+ *
+ *  Copyright (c) 2002 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Kendrick Smith <kmsmith@umich.edu>
+ *  Andy Adamson   <andros@umich.edu>
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _LINUX_NFSD_XDR4_H
+#define _LINUX_NFSD_XDR4_H
+
+#include "state.h"
+#include "nfsd.h"
+
+#define NFSD4_MAX_TAGLEN        128
+#define XDR_LEN(n)                     (((n) + 3) & ~3)
+
+struct nfsd4_compound_state {
+        struct svc_fh           current_fh;
+        struct svc_fh           save_fh;
+        struct nfs4_stateowner  *replay_owner;
+        /* For sessions DRC */
+        struct nfsd4_session    *session;
+        struct nfsd4_slot       *slot;
+        __be32                  *datap;
+        size_t                  iovlen;
+        u32                     minorversion;
+        u32                     status;
+};
+
+static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
+{
+        return cs->slot != NULL;
+}
+
+struct nfsd4_change_info {
+        u32             atomic;
+        bool            change_supported;
+        u32             before_ctime_sec;
+        u32             before_ctime_nsec;
+        u64             before_change;
+        u32             after_ctime_sec;
+        u32             after_ctime_nsec;
+        u64             after_change;
+};
+
+struct nfsd4_access {
+        u32             ac_req_access;      /* request */
+        u32             ac_supported;       /* response */
+        u32             ac_resp_access;     /* response */
+};
+
+struct nfsd4_close {
+        u32             cl_seqid;           /* request */
+        stateid_t       cl_stateid;         /* request+response */
+        struct nfs4_stateowner * cl_stateowner; /* response */
+};
+
+struct nfsd4_commit {
+        u64             co_offset;          /* request */
+        u32             co_count;           /* request */
+        nfs4_verifier   co_verf;            /* response */
+};
+
+struct nfsd4_create {
+        u32             cr_namelen;         /* request */
+        char *          cr_name;            /* request */
+        u32             cr_type;            /* request */
+        union {                             /* request */
+                struct {
+                        u32 namelen;
+                        char *name;
+                } link;   /* NF4LNK */
+                struct {
+                        u32 specdata1;
+                        u32 specdata2;
+                } dev;    /* NF4BLK, NF4CHR */
+        } u;
+        u32             cr_bmval[3];        /* request */
+        struct iattr    cr_iattr;           /* request */
+        struct nfsd4_change_info  cr_cinfo; /* response */
+        struct nfs4_acl *cr_acl;
+};
+#define cr_linklen      u.link.namelen
+#define cr_linkname     u.link.name
+#define cr_specdata1    u.dev.specdata1
+#define cr_specdata2    u.dev.specdata2
+
+struct nfsd4_delegreturn {
+        stateid_t       dr_stateid;
+};
+
+struct nfsd4_getattr {
+        u32             ga_bmval[3];        /* request */
+        struct svc_fh   *ga_fhp;            /* response */
+};
+
+struct nfsd4_link {
+        u32             li_namelen;         /* request */
+        char *          li_name;            /* request */
+        struct nfsd4_change_info  li_cinfo; /* response */
+};
+
+struct nfsd4_lock_denied {
+        clientid_t      ld_clientid;
+        struct nfs4_stateowner   *ld_sop;
+        u64             ld_start;
+        u64             ld_length;
+        u32             ld_type;
+};
+
+struct nfsd4_lock {
+        /* request */
+        u32             lk_type;
+        u32             lk_reclaim;         /* boolean */
+        u64             lk_offset;
+        u64             lk_length;
+        u32             lk_is_new;
+        union {
+                struct {
+                        u32             open_seqid;
+                        stateid_t       open_stateid;
+                        u32             lock_seqid;
+                        clientid_t      clientid;
+                        struct xdr_netobj owner;
+                } new;
+                struct {
+                        stateid_t       lock_stateid;
+                        u32             lock_seqid;
+                } old;
+        } v;
+
+        /* response */
+        union {
+                struct {
+                        stateid_t               stateid;
+                } ok;
+                struct nfsd4_lock_denied        denied;
+        } u;
+        /* The lk_replay_owner is the open owner in the open_to_lock_owner
+         * case and the lock owner otherwise: */
+        struct nfs4_stateowner *lk_replay_owner;
+};
+#define lk_new_open_seqid       v.new.open_seqid
+#define lk_new_open_stateid     v.new.open_stateid
+#define lk_new_lock_seqid       v.new.lock_seqid
+#define lk_new_clientid         v.new.clientid
+#define lk_new_owner            v.new.owner
+#define lk_old_lock_stateid     v.old.lock_stateid
+#define lk_old_lock_seqid       v.old.lock_seqid
+
+#define lk_rflags       u.ok.rflags
+#define lk_resp_stateid u.ok.stateid
+#define lk_denied       u.denied
+
+
+struct nfsd4_lockt {
+        u32                             lt_type;
+        clientid_t                      lt_clientid;
+        struct xdr_netobj               lt_owner;
+        u64                             lt_offset;
+        u64                             lt_length;
+        struct nfs4_stateowner *        lt_stateowner;
+        struct nfsd4_lock_denied        lt_denied;
+};
+
+ 
+struct nfsd4_locku {
+        u32             lu_type;
+        u32             lu_seqid;
+        stateid_t       lu_stateid;
+        u64             lu_offset;
+        u64             lu_length;
+        struct nfs4_stateowner  *lu_stateowner;
+};
+
+
+struct nfsd4_lookup {
+        u32             lo_len;             /* request */
+        char *          lo_name;            /* request */
+};
+
+struct nfsd4_putfh {
+        u32             pf_fhlen;           /* request */
+        char            *pf_fhval;          /* request */
+};
+
+struct nfsd4_open {
+        u32             op_claim_type;      /* request */
+        struct xdr_netobj op_fname;         /* request - everything but CLAIM_PREV */
+        u32             op_delegate_type;   /* request - CLAIM_PREV only */
+        stateid_t       op_delegate_stateid; /* request - response */
+        u32             op_create;          /* request */
+        u32             op_createmode;      /* request */
+        u32             op_bmval[3];        /* request */
+        struct iattr    iattr;              /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
+        nfs4_verifier   verf;               /* EXCLUSIVE4 */
+        clientid_t      op_clientid;        /* request */
+        struct xdr_netobj op_owner;           /* request */
+        u32             op_seqid;           /* request */
+        u32             op_share_access;    /* request */
+        u32             op_share_deny;      /* request */
+        stateid_t       op_stateid;         /* response */
+        u32             op_recall;          /* recall */
+        struct nfsd4_change_info  op_cinfo; /* response */
+        u32             op_rflags;          /* response */
+        int             op_truncate;        /* used during processing */
+        struct nfs4_stateowner *op_stateowner; /* used during processing */
+        struct nfs4_acl *op_acl;
+};
+#define op_iattr        iattr
+#define op_verf         verf
+
+struct nfsd4_open_confirm {
+        stateid_t       oc_req_stateid          /* request */;
+        u32             oc_seqid                /* request */;
+        stateid_t       oc_resp_stateid         /* response */;
+        struct nfs4_stateowner * oc_stateowner; /* response */
+};
+
+struct nfsd4_open_downgrade {
+        stateid_t       od_stateid;
+        u32             od_seqid;
+        u32             od_share_access;
+        u32             od_share_deny;
+        struct nfs4_stateowner *od_stateowner;
+};
+
+
+struct nfsd4_read {
+        stateid_t       rd_stateid;         /* request */
+        u64             rd_offset;          /* request */
+        u32             rd_length;          /* request */
+        int             rd_vlen;
+        struct file     *rd_filp;
+        
+        struct svc_rqst *rd_rqstp;          /* response */
+        struct svc_fh * rd_fhp;             /* response */
+};
+
+struct nfsd4_readdir {
+        u64             rd_cookie;          /* request */
+        nfs4_verifier   rd_verf;            /* request */
+        u32             rd_dircount;        /* request */
+        u32             rd_maxcount;        /* request */
+        u32             rd_bmval[3];        /* request */
+        struct svc_rqst *rd_rqstp;          /* response */
+        struct svc_fh * rd_fhp;             /* response */
+
+        struct readdir_cd       common;
+        __be32 *                buffer;
+        int                     buflen;
+        __be32 *                offset;
+};
+
+struct nfsd4_release_lockowner {
+        clientid_t        rl_clientid;
+        struct xdr_netobj rl_owner;
+};
+struct nfsd4_readlink {
+        struct svc_rqst *rl_rqstp;          /* request */
+        struct svc_fh * rl_fhp;             /* request */
+};
+
+struct nfsd4_remove {
+        u32             rm_namelen;         /* request */
+        char *          rm_name;            /* request */
+        struct nfsd4_change_info  rm_cinfo; /* response */
+};
+
+struct nfsd4_rename {
+        u32             rn_snamelen;        /* request */
+        char *          rn_sname;           /* request */
+        u32             rn_tnamelen;        /* request */
+        char *          rn_tname;           /* request */
+        struct nfsd4_change_info  rn_sinfo; /* response */
+        struct nfsd4_change_info  rn_tinfo; /* response */
+};
+
+struct nfsd4_secinfo {
+        u32 si_namelen;                                 /* request */
+        char *si_name;                                  /* request */
+        struct svc_export *si_exp;                      /* response */
+};
+
+struct nfsd4_setattr {
+        stateid_t       sa_stateid;         /* request */
+        u32             sa_bmval[3];        /* request */
+        struct iattr    sa_iattr;           /* request */
+        struct nfs4_acl *sa_acl;
+};
+
+struct nfsd4_setclientid {
+        nfs4_verifier   se_verf;            /* request */
+        u32             se_namelen;         /* request */
+        char *          se_name;            /* request */
+        u32             se_callback_prog;   /* request */
+        u32             se_callback_netid_len;  /* request */
+        char *          se_callback_netid_val;  /* request */
+        u32             se_callback_addr_len;   /* request */
+        char *          se_callback_addr_val;   /* request */
+        u32             se_callback_ident;  /* request */
+        clientid_t      se_clientid;        /* response */
+        nfs4_verifier   se_confirm;         /* response */
+};
+
+struct nfsd4_setclientid_confirm {
+        clientid_t      sc_clientid;
+        nfs4_verifier   sc_confirm;
+};
+
+/* also used for NVERIFY */
+struct nfsd4_verify {
+        u32             ve_bmval[3];        /* request */
+        u32             ve_attrlen;         /* request */
+        char *          ve_attrval;         /* request */
+};
+
+struct nfsd4_write {
+        stateid_t       wr_stateid;         /* request */
+        u64             wr_offset;          /* request */
+        u32             wr_stable_how;      /* request */
+        u32             wr_buflen;          /* request */
+        int             wr_vlen;
+
+        u32             wr_bytes_written;   /* response */
+        u32             wr_how_written;     /* response */
+        nfs4_verifier   wr_verifier;        /* response */
+};
+
+struct nfsd4_exchange_id {
+        nfs4_verifier   verifier;
+        struct xdr_netobj clname;
+        u32             flags;
+        clientid_t      clientid;
+        u32             seqid;
+        int             spa_how;
+};
+
+struct nfsd4_sequence {
+        struct nfs4_sessionid   sessionid;              /* request/response */
+        u32                     seqid;                  /* request/response */
+        u32                     slotid;                 /* request/response */
+        u32                     maxslots;               /* request/response */
+        u32                     cachethis;              /* request */
+#if 0
+        u32                     target_maxslots;        /* response */
+        u32                     status_flags;           /* response */
+#endif /* not yet */
+};
+
+struct nfsd4_destroy_session {
+        struct nfs4_sessionid   sessionid;
+};
+
+struct nfsd4_op {
+        int                                     opnum;
+        __be32                                  status;
+        union {
+                struct nfsd4_access             access;
+                struct nfsd4_close              close;
+                struct nfsd4_commit             commit;
+                struct nfsd4_create             create;
+                struct nfsd4_delegreturn        delegreturn;
+                struct nfsd4_getattr            getattr;
+                struct svc_fh *                 getfh;
+                struct nfsd4_link               link;
+                struct nfsd4_lock               lock;
+                struct nfsd4_lockt              lockt;
+                struct nfsd4_locku              locku;
+                struct nfsd4_lookup             lookup;
+                struct nfsd4_verify             nverify;
+                struct nfsd4_open               open;
+                struct nfsd4_open_confirm       open_confirm;
+                struct nfsd4_open_downgrade     open_downgrade;
+                struct nfsd4_putfh              putfh;
+                struct nfsd4_read               read;
+                struct nfsd4_readdir            readdir;
+                struct nfsd4_readlink           readlink;
+                struct nfsd4_remove             remove;
+                struct nfsd4_rename             rename;
+                clientid_t                      renew;
+                struct nfsd4_secinfo            secinfo;
+                struct nfsd4_setattr            setattr;
+                struct nfsd4_setclientid        setclientid;
+                struct nfsd4_setclientid_confirm setclientid_confirm;
+                struct nfsd4_verify             verify;
+                struct nfsd4_write              write;
+                struct nfsd4_release_lockowner  release_lockowner;
+
+                /* NFSv4.1 */
+                struct nfsd4_exchange_id        exchange_id;
+                struct nfsd4_create_session     create_session;
+                struct nfsd4_destroy_session    destroy_session;
+                struct nfsd4_sequence           sequence;
+        } u;
+        struct nfs4_replay *                    replay;
+};
+
+struct nfsd4_compoundargs {
+        /* scratch variables for XDR decode */
+        __be32 *                        p;
+        __be32 *                        end;
+        struct page **                  pagelist;
+        int                             pagelen;
+        __be32                          tmp[8];
+        __be32 *                        tmpp;
+        struct tmpbuf {
+                struct tmpbuf *next;
+                void (*release)(const void *);
+                void *buf;
+        }                               *to_free;
+
+        struct svc_rqst                 *rqstp;
+
+        u32                             taglen;
+        char *                          tag;
+        u32                             minorversion;
+        u32                             opcnt;
+        struct nfsd4_op                 *ops;
+        struct nfsd4_op                 iops[8];
+};
+
+struct nfsd4_compoundres {
+        /* scratch variables for XDR encode */
+        __be32 *                        p;
+        __be32 *                        end;
+        struct xdr_buf *                xbuf;
+        struct svc_rqst *               rqstp;
+
+        u32                             taglen;
+        char *                          tag;
+        u32                             opcnt;
+        __be32 *                        tagp; /* tag, opcount encode location */
+        struct nfsd4_compound_state     cstate;
+};
+
+static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
+{
+        struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
+        return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;
+}
+
+static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)
+{
+        return !resp->cstate.slot->sl_cachethis || nfsd4_is_solo_sequence(resp);
+}
+
+#define NFS4_SVC_XDRSIZE                sizeof(struct nfsd4_compoundargs)
+
+static inline void
+set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
+{
+        BUG_ON(!fhp->fh_pre_saved || !fhp->fh_post_saved);
+        cinfo->atomic = 1;
+        cinfo->change_supported = IS_I_VERSION(fhp->fh_dentry->d_inode);
+        if (cinfo->change_supported) {
+                cinfo->before_change = fhp->fh_pre_change;
+                cinfo->after_change = fhp->fh_post_change;
+        } else {
+                cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec;
+                cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec;
+                cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec;
+                cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec;
+        }
+}
+
+int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *, void *);
+int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *,
+                struct nfsd4_compoundargs *);
+int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *,
+                struct nfsd4_compoundres *);
+void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
+void nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op);
+__be32 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
+                       struct dentry *dentry, __be32 *buffer, int *countp,
+                       u32 *bmval, struct svc_rqst *, int ignore_crossmnt);
+extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+                struct nfsd4_setclientid *setclid);
+extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+                struct nfsd4_setclientid_confirm *setclientid_confirm);
+extern void nfsd4_store_cache_entry(struct nfsd4_compoundres *resp);
+extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
+                struct nfsd4_sequence *seq);
+extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+struct nfsd4_exchange_id *);
+                extern __be32 nfsd4_create_session(struct svc_rqst *,
+                struct nfsd4_compound_state *,
+                struct nfsd4_create_session *);
+extern __be32 nfsd4_sequence(struct svc_rqst *,
+                struct nfsd4_compound_state *,
+                struct nfsd4_sequence *);
+extern __be32 nfsd4_destroy_session(struct svc_rqst *,
+                struct nfsd4_compound_state *,
+                struct nfsd4_destroy_session *);
+extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,
+                struct nfsd4_open *open);
+extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
+                struct svc_fh *current_fh, struct nfsd4_open *open);
+extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *, struct nfsd4_open_confirm *oc);
+extern __be32 nfsd4_close(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+                struct nfsd4_close *close);
+extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+                struct nfsd4_open_downgrade *od);
+extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
+                struct nfsd4_lock *lock);
+extern __be32 nfsd4_lockt(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+                struct nfsd4_lockt *lockt);
+extern __be32 nfsd4_locku(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+                struct nfsd4_locku *locku);
+extern __be32
+nfsd4_release_lockowner(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
+                struct nfsd4_release_lockowner *rlockowner);
+extern void nfsd4_release_compoundargs(struct nfsd4_compoundargs *);
+extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
+extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
+                          struct nfsd4_compound_state *, clientid_t *clid);
+#endif
+
+/*
+ * Local variables:
+ *  c-basic-offset: 8
+ * End:
+ */
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index deb2b132ae5e..3dae4a13f6e4 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -547,6 +547,9 @@ bail:
  *
  * called like this: dio->get_blocks(dio->inode, fs_startblk,
  *                                      fs_count, map_bh, dio->rw == WRITE);
+ *
+ * Note that we never bother to allocate blocks here, and thus ignore the
+ * create argument.
  */
 static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
                                      struct buffer_head *bh_result, int create)
@@ -563,14 +566,6 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
 
         inode_blocks = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode));
 
-        /*
-         * Any write past EOF is not allowed because we'd be extending.
-         */
-        if (create && (iblock + max_blocks) > inode_blocks) {
-                ret = -EIO;
-                goto bail;
-        }
-
         /* This figures out the size of the next contiguous block, and
          * our logical offset */
         ret = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno,
@@ -582,15 +577,6 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
                 goto bail;
         }
 
-        if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)) && !p_blkno && create) {
-                ocfs2_error(inode->i_sb,
-                            "Inode %llu has a hole at block %llu\n",
-                            (unsigned long long)OCFS2_I(inode)->ip_blkno,
-                            (unsigned long long)iblock);
-                ret = -EROFS;
-                goto bail;
-        }
-
         /* We should already CoW the refcounted extent. */
         BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
         /*
@@ -601,20 +587,8 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
          */
         if (p_blkno && !(ext_flags & OCFS2_EXT_UNWRITTEN))
                 map_bh(bh_result, inode->i_sb, p_blkno);
-        else {
-                /*
-                 * ocfs2_prepare_inode_for_write() should have caught
-                 * the case where we'd be filling a hole and triggered
-                 * a buffered write instead.
-                 */
-                if (create) {
-                        ret = -EIO;
-                        mlog_errno(ret);
-                        goto bail;
-                }
-
+        else
                 clear_buffer_mapped(bh_result);
-        }
 
         /* make sure we don't map more than max_blocks blocks here as
            that's all the kernel will handle at this point. */
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 4df4a464a919..18d5cc62d8ed 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2266,7 +2266,7 @@ static const struct inode_operations proc_attr_dir_inode_operations = {
 
 #endif
 
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
 static ssize_t proc_coredump_filter_read(struct file *file, char __user *buf,
                                          size_t count, loff_t *ppos)
 {
@@ -2623,7 +2623,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 #ifdef CONFIG_FAULT_INJECTION
         REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations),
 #endif
-#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
+#ifdef CONFIG_ELF_CORE
         REG("coredump_filter", S_IRUGO|S_IWUSR, proc_coredump_filter_operations),
 #endif
 #ifdef CONFIG_TASK_IO_ACCOUNTING
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index fa678abc9db1..480cb1065eec 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -429,7 +429,7 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
                         unsigned int ino;
 
                         ino = de->low_ino;
-                        de_get(de);
+                        pde_get(de);
                         spin_unlock(&proc_subdir_lock);
                         error = -EINVAL;
                         inode = proc_get_inode(dir->i_sb, ino, de);
@@ -445,7 +445,7 @@ out_unlock:
                 return NULL;
         }
         if (de)
-                de_put(de);
+                pde_put(de);
         return ERR_PTR(error);
 }
 
@@ -509,17 +509,17 @@ int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
                                 struct proc_dir_entry *next;
 
                                 /* filldir passes info to user space */
-                                de_get(de);
+                                pde_get(de);
                                 spin_unlock(&proc_subdir_lock);
                                 if (filldir(dirent, de->name, de->namelen, filp->f_pos,
                                             de->low_ino, de->mode >> 12) < 0) {
-                                        de_put(de);
+                                        pde_put(de);
                                         goto out;
                                 }
                                 spin_lock(&proc_subdir_lock);
                                 filp->f_pos++;
                                 next = de->next;
-                                de_put(de);
+                                pde_put(de);
                                 de = next;
                         } while (de);
                         spin_unlock(&proc_subdir_lock);
@@ -763,7 +763,7 @@ out:
         return NULL;
 }
 
-void free_proc_entry(struct proc_dir_entry *de)
+static void free_proc_entry(struct proc_dir_entry *de)
 {
         unsigned int ino = de->low_ino;
 
@@ -777,6 +777,12 @@ void free_proc_entry(struct proc_dir_entry *de)
         kfree(de);
 }
 
+void pde_put(struct proc_dir_entry *pde)
+{
+        if (atomic_dec_and_test(&pde->count))
+                free_proc_entry(pde);
+}
+
 /*
  * Remove a /proc entry and free it if it's not currently in use.
  */
@@ -845,6 +851,5 @@ continue_removing:
         WARN(de->subdir, KERN_WARNING "%s: removing non-empty directory "
                         "'%s/%s', leaking at least '%s'\n", __func__,
                         de->parent->name, de->name, de->subdir->name);
-        if (atomic_dec_and_test(&de->count))
-                free_proc_entry(de);
+        pde_put(de);
 }
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index d78ade305541..445a02bcaab3 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -24,29 +24,6 @@
 
 #include "internal.h"
 
-struct proc_dir_entry *de_get(struct proc_dir_entry *de)
-{
-        atomic_inc(&de->count);
-        return de;
-}
-
-/*
- * Decrements the use count and checks for deferred deletion.
- */
-void de_put(struct proc_dir_entry *de)
-{
-        if (!atomic_read(&de->count)) {
-                printk("de_put: entry %s already free!\n", de->name);
-                return;
-        }
-
-        if (atomic_dec_and_test(&de->count))
-                free_proc_entry(de);
-}
-
-/*
- * Decrement the use count of the proc_dir_entry.
- */
 static void proc_delete_inode(struct inode *inode)
 {
         struct proc_dir_entry *de;
@@ -59,7 +36,7 @@ static void proc_delete_inode(struct inode *inode)
         /* Let go of any associated proc directory entry */
         de = PROC_I(inode)->pde;
         if (de)
-                de_put(de);
+                pde_put(de);
         if (PROC_I(inode)->sysctl)
                 sysctl_head_put(PROC_I(inode)->sysctl);
         clear_inode(inode);
@@ -480,7 +457,7 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
                 }
                 unlock_new_inode(inode);
         } else
-               de_put(de);
+               pde_put(de);
         return inode;
 }                       
 
@@ -495,7 +472,7 @@ int proc_fill_super(struct super_block *s)
         s->s_op = &proc_sops;
         s->s_time_gran = 1;
         
-        de_get(&proc_root);
+        pde_get(&proc_root);
         root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
         if (!root_inode)
                 goto out_no_root;
@@ -509,6 +486,6 @@ int proc_fill_super(struct super_block *s)
 out_no_root:
         printk("proc_read_super: get root inode failed\n");
         iput(root_inode);
-        de_put(&proc_root);
+        pde_put(&proc_root);
         return -ENOMEM;
 }
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 753ca37002c8..1f24a3eddd12 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -61,8 +61,6 @@ extern const struct file_operations proc_pagemap_operations;
 extern const struct file_operations proc_net_operations;
 extern const struct inode_operations proc_net_inode_operations;
 
-void free_proc_entry(struct proc_dir_entry *de);
-
 void proc_init_inodecache(void);
 
 static inline struct pid *proc_pid(struct inode *inode)
@@ -101,8 +99,12 @@ unsigned long task_vsize(struct mm_struct *);
 int task_statm(struct mm_struct *, int *, int *, int *, int *);
 void task_mem(struct seq_file *, struct mm_struct *);
 
-struct proc_dir_entry *de_get(struct proc_dir_entry *de);
-void de_put(struct proc_dir_entry *de);
+static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
+{
+        atomic_inc(&pde->count);
+        return pde;
+}
+void pde_put(struct proc_dir_entry *pde);
 
 extern struct vfsmount *proc_mnt;
 int proc_fill_super(struct super_block *);
diff --git a/fs/qnx4/bitmap.c b/fs/qnx4/bitmap.c
index 32f5d131a644..22e0d60e53ef 100644
--- a/fs/qnx4/bitmap.c
+++ b/fs/qnx4/bitmap.c
@@ -17,13 +17,6 @@
 #include <linux/bitops.h>
 #include "qnx4.h"
 
-#if 0
-int qnx4_new_block(struct super_block *sb)
-{
-        return 0;
-}
-#endif  /*  0  */
-
 static void count_bits(register const char *bmPart, register int size,
                        int *const tf)
 {
@@ -35,22 +28,7 @@ static void count_bits(register const char *bmPart, register int size,
         }
         do {
                 b = *bmPart++;
-                if ((b & 1) == 0)
-                        tot++;
-                if ((b & 2) == 0)
-                        tot++;
-                if ((b & 4) == 0)
-                        tot++;
-                if ((b & 8) == 0)
-                        tot++;
-                if ((b & 16) == 0)
-                        tot++;
-                if ((b & 32) == 0)
-                        tot++;
-                if ((b & 64) == 0)
-                        tot++;
-                if ((b & 128) == 0)
-                        tot++;
+                tot += 8 - hweight8(b);
                 size--;
         } while (size != 0);
         *tf = tot;
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index 449f5a66dd34..ebf3440d28ca 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -64,25 +64,7 @@ static struct buffer_head *qnx4_getblk(struct inode *inode, int nr,
                 result = sb_getblk(inode->i_sb, nr);
                 return result;
         }
-        if (!create) {
-                return NULL;
-        }
-#if 0
-        tmp = qnx4_new_block(inode->i_sb);
-        if (!tmp) {
-                return NULL;
-        }
-        result = sb_getblk(inode->i_sb, tmp);
-        if (tst) {
-                qnx4_free_block(inode->i_sb, tmp);
-                brelse(result);
-                goto repeat;
-        }
-        tst = tmp;
-#endif
-        inode->i_ctime = CURRENT_TIME_SEC;
-        mark_inode_dirty(inode);
-        return result;
+        return NULL;
 }
 
 struct buffer_head *qnx4_bread(struct inode *inode, int block, int create)
@@ -113,8 +95,6 @@ static int qnx4_get_block( struct inode *inode, sector_t iblock, struct buffer_h
         if ( phys ) {
                 // logical block is before EOF
                 map_bh(bh, inode->i_sb, phys);
-        } else if ( create ) {
-                // to be done.
         }
         return 0;
 }
diff --git a/fs/reiserfs/Makefile b/fs/reiserfs/Makefile
index 6a9e30c041dd..792b3cb2cd18 100644
--- a/fs/reiserfs/Makefile
+++ b/fs/reiserfs/Makefile
@@ -7,7 +7,11 @@ obj-$(CONFIG_REISERFS_FS) += reiserfs.o
 reiserfs-objs := bitmap.o do_balan.o namei.o inode.o file.o dir.o fix_node.o \
                  super.o prints.o objectid.o lbalance.o ibalance.o stree.o \
                  hashes.o tail_conversion.o journal.o resize.o \
-                 item_ops.o ioctl.o procfs.o xattr.o lock.o
+                 item_ops.o ioctl.o xattr.o lock.o
+
+ifeq ($(CONFIG_REISERFS_PROC_INFO),y)
+reiserfs-objs += procfs.o
+endif
 
 ifeq ($(CONFIG_REISERFS_FS_XATTR),y)
 reiserfs-objs += xattr_user.o xattr_trusted.o
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 9229e5514a4e..7a9981196c1c 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -17,8 +17,6 @@
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 
-#ifdef CONFIG_REISERFS_PROC_INFO
-
 /*
  * LOCKING:
  *
@@ -48,14 +46,6 @@ static int show_version(struct seq_file *m, struct super_block *sb)
         return 0;
 }
 
-int reiserfs_global_version_in_proc(char *buffer, char **start, off_t offset,
-                                    int count, int *eof, void *data)
-{
-        *start = buffer;
-        *eof = 1;
-        return 0;
-}
-
 #define SF( x ) ( r -> x )
 #define SFP( x ) SF( s_proc_info_data.x )
 #define SFPL( x ) SFP( x[ level ] )
@@ -538,19 +528,6 @@ int reiserfs_proc_info_done(struct super_block *sb)
         return 0;
 }
 
-struct proc_dir_entry *reiserfs_proc_register_global(char *name,
-                                                     read_proc_t * func)
-{
-        return (proc_info_root) ? create_proc_read_entry(name, 0,
-                                                         proc_info_root,
-                                                         func, NULL) : NULL;
-}
-
-void reiserfs_proc_unregister_global(const char *name)
-{
-        remove_proc_entry(name, proc_info_root);
-}
-
 int reiserfs_proc_info_global_init(void)
 {
         if (proc_info_root == NULL) {
@@ -572,48 +549,6 @@ int reiserfs_proc_info_global_done(void)
         }
         return 0;
 }
-
-/* REISERFS_PROC_INFO */
-#else
-
-int reiserfs_proc_info_init(struct super_block *sb)
-{
-        return 0;
-}
-int reiserfs_proc_info_done(struct super_block *sb)
-{
-        return 0;
-}
-
-struct proc_dir_entry *reiserfs_proc_register_global(char *name,
-                                                     read_proc_t * func)
-{
-        return NULL;
-}
-
-void reiserfs_proc_unregister_global(const char *name)
-{;
-}
-
-int reiserfs_proc_info_global_init(void)
-{
-        return 0;
-}
-int reiserfs_proc_info_global_done(void)
-{
-        return 0;
-}
-
-int reiserfs_global_version_in_proc(char *buffer, char **start,
-                                    off_t offset,
-                                    int count, int *eof, void *data)
-{
-        return 0;
-}
-
-/* REISERFS_PROC_INFO */
-#endif
-
 /*
  * Revision 1.1.8.2  2001/07/15 17:08:42  god
  *  . use get_super() in procfs.c
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 339b0baf2af6..b4a7dd03bdb9 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -2222,8 +2222,6 @@ static int __init init_reiserfs_fs(void)
         }
 
         reiserfs_proc_info_global_init();
-        reiserfs_proc_register_global("version",
-                                      reiserfs_global_version_in_proc);
 
         ret = register_filesystem(&reiserfs_fs_type);
 
@@ -2231,7 +2229,6 @@ static int __init init_reiserfs_fs(void)
                 return 0;
         }
 
-        reiserfs_proc_unregister_global("version");
         reiserfs_proc_info_global_done();
         destroy_inodecache();
 
@@ -2240,7 +2237,6 @@ static int __init init_reiserfs_fs(void)
 
 static void __exit exit_reiserfs_fs(void)
 {
-        reiserfs_proc_unregister_global("version");
         reiserfs_proc_info_global_done();
         unregister_filesystem(&reiserfs_fs_type);
         destroy_inodecache();
diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
index 6f671f1ac271..22af68f8b682 100644
--- a/fs/ufs/dir.c
+++ b/fs/ufs/dir.c
@@ -70,13 +70,13 @@ 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 dentry *dentry)
+ino_t ufs_inode_by_name(struct inode *dir, struct qstr *qstr)
 {
         ino_t res = 0;
         struct ufs_dir_entry *de;
         struct page *page;
         
-        de = ufs_find_entry(dir, dentry, &page);
+        de = ufs_find_entry(dir, qstr, &page);
         if (de) {
                 res = fs32_to_cpu(dir->i_sb, de->d_ino);
                 ufs_put_page(page);
@@ -249,12 +249,12 @@ 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 dentry *dentry,
+struct ufs_dir_entry *ufs_find_entry(struct inode *dir, struct qstr *qstr,
                                      struct page **res_page)
 {
         struct super_block *sb = dir->i_sb;
-        const char *name = dentry->d_name.name;
-        int namelen = dentry->d_name.len;
+        const char *name = qstr->name;
+        int namelen = qstr->len;
         unsigned reclen = UFS_DIR_REC_LEN(namelen);
         unsigned long start, n;
         unsigned long npages = ufs_dir_pages(dir);
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index 23119fe7ad62..4c26d9e8bc94 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -56,7 +56,7 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, stru
                 return ERR_PTR(-ENAMETOOLONG);
 
         lock_kernel();
-        ino = ufs_inode_by_name(dir, dentry);
+        ino = ufs_inode_by_name(dir, &dentry->d_name);
         if (ino) {
                 inode = ufs_iget(dir->i_sb, ino);
                 if (IS_ERR(inode)) {
@@ -237,7 +237,7 @@ static int ufs_unlink(struct inode *dir, struct dentry *dentry)
         struct page *page;
         int err = -ENOENT;
 
-        de = ufs_find_entry(dir, dentry, &page);
+        de = ufs_find_entry(dir, &dentry->d_name, &page);
         if (!de)
                 goto out;
 
@@ -281,7 +281,7 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
         struct ufs_dir_entry *old_de;
         int err = -ENOENT;
 
-        old_de = ufs_find_entry(old_dir, old_dentry, &old_page);
+        old_de = ufs_find_entry(old_dir, &old_dentry->d_name, &old_page);
         if (!old_de)
                 goto out;
 
@@ -301,7 +301,7 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
                         goto out_dir;
 
                 err = -ENOENT;
-                new_de = ufs_find_entry(new_dir, new_dentry, &new_page);
+                new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
                 if (!new_de)
                         goto out_dir;
                 inode_inc_link_count(old_inode);
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5faed7954d0a..143c20bfb04b 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -66,6 +66,7 @@
  */
 
 
+#include <linux/exportfs.h>
 #include <linux/module.h>
 #include <linux/bitops.h>
 
@@ -96,6 +97,56 @@
 #include "swab.h"
 #include "util.h"
 
+static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation)
+{
+        struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+        struct inode *inode;
+
+        if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
+                return ERR_PTR(-ESTALE);
+
+        inode = ufs_iget(sb, ino);
+        if (IS_ERR(inode))
+                return ERR_CAST(inode);
+        if (generation && inode->i_generation != generation) {
+                iput(inode);
+                return ERR_PTR(-ESTALE);
+        }
+        return inode;
+}
+
+static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid,
+                                       int fh_len, int fh_type)
+{
+        return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
+}
+
+static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid,
+                                       int fh_len, int fh_type)
+{
+        return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode);
+}
+
+static struct dentry *ufs_get_parent(struct dentry *child)
+{
+        struct qstr dot_dot = {
+                .name   = "..",
+                .len    = 2,
+        };
+        ino_t ino;
+
+        ino = ufs_inode_by_name(child->d_inode, &dot_dot);
+        if (!ino)
+                return ERR_PTR(-ENOENT);
+        return d_obtain_alias(ufs_iget(child->d_inode->i_sb, ino));
+}
+
+static const struct export_operations ufs_export_ops = {
+        .fh_to_dentry   = ufs_fh_to_dentry,
+        .fh_to_parent   = ufs_fh_to_parent,
+        .get_parent     = ufs_get_parent,
+};
+
 #ifdef CONFIG_UFS_DEBUG
 /*
  * Print contents of ufs_super_block, useful for debugging
@@ -990,6 +1041,7 @@ magic_found:
          * Read ufs_super_block into internal data structures
          */
         sb->s_op = &ufs_super_ops;
+        sb->s_export_op = &ufs_export_ops;
         sb->dq_op = NULL; /***/
         sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);
 
diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h
index 644e77e13599..0b4c39bc0d9e 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 dentry *);
+extern ino_t ufs_inode_by_name(struct inode *, struct qstr *);
 extern int ufs_make_empty(struct inode *, struct inode *);
-extern struct ufs_dir_entry *ufs_find_entry(struct inode *, struct dentry *, struct page **);
+extern struct ufs_dir_entry *ufs_find_entry(struct inode *, 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/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index d798c54296eb..66abe36c1213 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1474,19 +1474,13 @@ xfs_vm_direct_IO(
 
         bdev = xfs_find_bdev_for_inode(XFS_I(inode));
 
-        if (rw == WRITE) {
-                iocb->private = xfs_alloc_ioend(inode, IOMAP_UNWRITTEN);
-                ret = blockdev_direct_IO_own_locking(rw, iocb, inode,
-                        bdev, iov, offset, nr_segs,
-                        xfs_get_blocks_direct,
-                        xfs_end_io_direct);
-        } else {
-                iocb->private = xfs_alloc_ioend(inode, IOMAP_READ);
-                ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
-                        bdev, iov, offset, nr_segs,
-                        xfs_get_blocks_direct,
-                        xfs_end_io_direct);
-        }
+        iocb->private = xfs_alloc_ioend(inode, rw == WRITE ?
+                                        IOMAP_UNWRITTEN : IOMAP_READ);
+
+        ret = blockdev_direct_IO_no_locking(rw, iocb, inode, bdev, iov,
+                                            offset, nr_segs,
+                                            xfs_get_blocks_direct,
+                                            xfs_end_io_direct);
 
         if (unlikely(ret != -EIOCBQUEUED && iocb->private))
                 xfs_destroy_ioend(iocb->private);