76 files changed, 1171 insertions, 725 deletions

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index f0d268b97d19..a439548de785 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -70,9 +70,13 @@ struct autofs_info {
 };
 
 #define AUTOFS_INF_EXPIRING     (1<<0) /* dentry in the process of expiring */
-#define AUTOFS_INF_NO_RCU       (1<<1) /* the dentry is being considered
+#define AUTOFS_INF_WANT_EXPIRE  (1<<1) /* the dentry is being considered
                                         * for expiry, so RCU_walk is
-                                        * not permitted
+                                        * not permitted.  If it progresses to
+                                        * actual expiry attempt, the flag is
+                                        * not cleared when EXPIRING is set -
+                                        * in that case it gets cleared only
+                                        * when it comes to clearing EXPIRING.
                                         */
 #define AUTOFS_INF_PENDING      (1<<2) /* dentry pending mount */
 
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 9510d8d2e9cd..b493909e7492 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -316,19 +316,17 @@ struct dentry *autofs4_expire_direct(struct super_block *sb,
         if (ino->flags & AUTOFS_INF_PENDING)
                 goto out;
         if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
-                ino->flags |= AUTOFS_INF_NO_RCU;
+                ino->flags |= AUTOFS_INF_WANT_EXPIRE;
                 spin_unlock(&sbi->fs_lock);
                 synchronize_rcu();
                 spin_lock(&sbi->fs_lock);
                 if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
                         ino->flags |= AUTOFS_INF_EXPIRING;
-                        smp_mb();
-                        ino->flags &= ~AUTOFS_INF_NO_RCU;
                         init_completion(&ino->expire_complete);
                         spin_unlock(&sbi->fs_lock);
                         return root;
                 }
-                ino->flags &= ~AUTOFS_INF_NO_RCU;
+                ino->flags &= ~AUTOFS_INF_WANT_EXPIRE;
         }
 out:
         spin_unlock(&sbi->fs_lock);
@@ -446,7 +444,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
         while ((dentry = get_next_positive_subdir(dentry, root))) {
                 spin_lock(&sbi->fs_lock);
                 ino = autofs4_dentry_ino(dentry);
-                if (ino->flags & AUTOFS_INF_NO_RCU)
+                if (ino->flags & AUTOFS_INF_WANT_EXPIRE)
                         expired = NULL;
                 else
                         expired = should_expire(dentry, mnt, timeout, how);
@@ -455,7 +453,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
                         continue;
                 }
                 ino = autofs4_dentry_ino(expired);
-                ino->flags |= AUTOFS_INF_NO_RCU;
+                ino->flags |= AUTOFS_INF_WANT_EXPIRE;
                 spin_unlock(&sbi->fs_lock);
                 synchronize_rcu();
                 spin_lock(&sbi->fs_lock);
@@ -465,7 +463,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
                         goto found;
                 }
 
-                ino->flags &= ~AUTOFS_INF_NO_RCU;
+                ino->flags &= ~AUTOFS_INF_WANT_EXPIRE;
                 if (expired != dentry)
                         dput(expired);
                 spin_unlock(&sbi->fs_lock);
@@ -475,17 +473,8 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
 found:
         pr_debug("returning %p %pd\n", expired, expired);
         ino->flags |= AUTOFS_INF_EXPIRING;
-        smp_mb();
-        ino->flags &= ~AUTOFS_INF_NO_RCU;
         init_completion(&ino->expire_complete);
         spin_unlock(&sbi->fs_lock);
-        spin_lock(&sbi->lookup_lock);
-        spin_lock(&expired->d_parent->d_lock);
-        spin_lock_nested(&expired->d_lock, DENTRY_D_LOCK_NESTED);
-        list_move(&expired->d_parent->d_subdirs, &expired->d_child);
-        spin_unlock(&expired->d_lock);
-        spin_unlock(&expired->d_parent->d_lock);
-        spin_unlock(&sbi->lookup_lock);
         return expired;
 }
 
@@ -496,7 +485,7 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk)
         int status;
 
         /* Block on any pending expire */
-        if (!(ino->flags & (AUTOFS_INF_EXPIRING | AUTOFS_INF_NO_RCU)))
+        if (!(ino->flags & AUTOFS_INF_WANT_EXPIRE))
                 return 0;
         if (rcu_walk)
                 return -ECHILD;
@@ -554,7 +543,7 @@ int autofs4_expire_run(struct super_block *sb,
         ino = autofs4_dentry_ino(dentry);
         /* avoid rapid-fire expire attempts if expiry fails */
         ino->last_used = now;
-        ino->flags &= ~AUTOFS_INF_EXPIRING;
+        ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE);
         complete_all(&ino->expire_complete);
         spin_unlock(&sbi->fs_lock);
 
@@ -583,7 +572,7 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
                 spin_lock(&sbi->fs_lock);
                 /* avoid rapid-fire expire attempts if expiry fails */
                 ino->last_used = now;
-                ino->flags &= ~AUTOFS_INF_EXPIRING;
+                ino->flags &= ~(AUTOFS_INF_EXPIRING|AUTOFS_INF_WANT_EXPIRE);
                 complete_all(&ino->expire_complete);
                 spin_unlock(&sbi->fs_lock);
                 dput(dentry);
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 78bd80298528..3767f6641af1 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -458,7 +458,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
                  */
                 struct inode *inode;
 
-                if (ino->flags & (AUTOFS_INF_EXPIRING | AUTOFS_INF_NO_RCU))
+                if (ino->flags & AUTOFS_INF_WANT_EXPIRE)
                         return 0;
                 if (d_mountpoint(dentry))
                         return 0;
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 0146d911f468..631f1554c87b 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -66,11 +66,12 @@ static int autofs4_write(struct autofs_sb_info *sbi,
         set_fs(KERNEL_DS);
 
         mutex_lock(&sbi->pipe_mutex);
-        wr = __vfs_write(file, data, bytes, &file->f_pos);
-        while (bytes && wr) {
+        while (bytes) {
+                wr = __vfs_write(file, data, bytes, &file->f_pos);
+                if (wr <= 0)
+                        break;
                 data += wr;
                 bytes -= wr;
-                wr = __vfs_write(file, data, bytes, &file->f_pos);
         }
         mutex_unlock(&sbi->pipe_mutex);
 
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index b677a6ea6001..7706c8dc5fa6 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -2645,7 +2645,7 @@ static void btrfsic_dump_tree_sub(const struct btrfsic_state *state,
          * This algorithm is recursive because the amount of used stack space
          * is very small and the max recursion depth is limited.
          */
-        indent_add = sprintf(buf, "%c-%llu(%s/%llu/%d)",
+        indent_add = sprintf(buf, "%c-%llu(%s/%llu/%u)",
                              btrfsic_get_block_type(state, block),
                              block->logical_bytenr, block->dev_state->name,
                              block->dev_bytenr, block->mirror_num);
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 427c36b430a6..a85cf7d23309 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1373,7 +1373,8 @@ tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 
         if (tm->op == MOD_LOG_KEY_REMOVE_WHILE_FREEING) {
                 BUG_ON(tm->slot != 0);
-                eb_rewin = alloc_dummy_extent_buffer(fs_info, eb->start);
+                eb_rewin = alloc_dummy_extent_buffer(fs_info, eb->start,
+                                                eb->len);
                 if (!eb_rewin) {
                         btrfs_tree_read_unlock_blocking(eb);
                         free_extent_buffer(eb);
@@ -1454,7 +1455,8 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
         } else if (old_root) {
                 btrfs_tree_read_unlock(eb_root);
                 free_extent_buffer(eb_root);
-                eb = alloc_dummy_extent_buffer(root->fs_info, logical);
+                eb = alloc_dummy_extent_buffer(root->fs_info, logical,
+                                        root->nodesize);
         } else {
                 btrfs_set_lock_blocking_rw(eb_root, BTRFS_READ_LOCK);
                 eb = btrfs_clone_extent_buffer(eb_root);
@@ -1552,6 +1554,7 @@ noinline int btrfs_cow_block(struct btrfs_trans_handle *trans,
                        trans->transid, root->fs_info->generation);
 
         if (!should_cow_block(trans, root, buf)) {
+                trans->dirty = true;
                 *cow_ret = buf;
                 return 0;
         }
@@ -1783,10 +1786,12 @@ static noinline int generic_bin_search(struct extent_buffer *eb,
                         if (!err) {
                                 tmp = (struct btrfs_disk_key *)(kaddr + offset -
                                                         map_start);
-                        } else {
+                        } else if (err == 1) {
                                 read_extent_buffer(eb, &unaligned,
                                                    offset, sizeof(unaligned));
                                 tmp = &unaligned;
+                        } else {
+                                return err;
                         }
 
                 } else {
@@ -2510,6 +2515,8 @@ read_block_for_search(struct btrfs_trans_handle *trans,
                 if (!btrfs_buffer_uptodate(tmp, 0, 0))
                         ret = -EIO;
                 free_extent_buffer(tmp);
+        } else {
+                ret = PTR_ERR(tmp);
         }
         return ret;
 }
@@ -2773,8 +2780,10 @@ again:
                          * then we don't want to set the path blocking,
                          * so we test it here
                          */
-                        if (!should_cow_block(trans, root, b))
+                        if (!should_cow_block(trans, root, b)) {
+                                trans->dirty = true;
                                 goto cow_done;
+                        }
 
                         /*
                          * must have write locks on this node and the
@@ -2823,6 +2832,8 @@ cow_done:
                 }
 
                 ret = key_search(b, key, level, &prev_cmp, &slot);
+                if (ret < 0)
+                        goto done;
 
                 if (level != 0) {
                         int dec = 0;
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 101c3cfd3f7c..4274a7bfdaed 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2518,7 +2518,7 @@ void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
                            struct btrfs_root *root, unsigned long count);
 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
-                                 unsigned long count, int wait);
+                                 unsigned long count, u64 transid, int wait);
 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
                              struct btrfs_root *root, u64 bytenr,
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 61561c2a3f96..d3aaabbfada0 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -1606,15 +1606,23 @@ int btrfs_inode_delayed_dir_index_count(struct inode *inode)
         return 0;
 }
 
-void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
-                             struct list_head *del_list)
+bool btrfs_readdir_get_delayed_items(struct inode *inode,
+                                     struct list_head *ins_list,
+                                     struct list_head *del_list)
 {
         struct btrfs_delayed_node *delayed_node;
         struct btrfs_delayed_item *item;
 
         delayed_node = btrfs_get_delayed_node(inode);
         if (!delayed_node)
-                return;
+                return false;
+
+        /*
+         * We can only do one readdir with delayed items at a time because of
+         * item->readdir_list.
+         */
+        inode_unlock_shared(inode);
+        inode_lock(inode);
 
         mutex_lock(&delayed_node->mutex);
         item = __btrfs_first_delayed_insertion_item(delayed_node);
@@ -1641,10 +1649,13 @@ void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
          * requeue or dequeue this delayed node.
          */
         atomic_dec(&delayed_node->refs);
+
+        return true;
 }
 
-void btrfs_put_delayed_items(struct list_head *ins_list,
-                             struct list_head *del_list)
+void btrfs_readdir_put_delayed_items(struct inode *inode,
+                                     struct list_head *ins_list,
+                                     struct list_head *del_list)
 {
         struct btrfs_delayed_item *curr, *next;
 
@@ -1659,6 +1670,12 @@ void btrfs_put_delayed_items(struct list_head *ins_list,
                 if (atomic_dec_and_test(&curr->refs))
                         kfree(curr);
         }
+
+        /*
+         * The VFS is going to do up_read(), so we need to downgrade back to a
+         * read lock.
+         */
+        downgrade_write(&inode->i_rwsem);
 }
 
 int btrfs_should_delete_dir_index(struct list_head *del_list,
diff --git a/fs/btrfs/delayed-inode.h b/fs/btrfs/delayed-inode.h
index 0167853c84ae..2495b3d4075f 100644
--- a/fs/btrfs/delayed-inode.h
+++ b/fs/btrfs/delayed-inode.h
@@ -137,10 +137,12 @@ void btrfs_kill_all_delayed_nodes(struct btrfs_root *root);
 void btrfs_destroy_delayed_inodes(struct btrfs_root *root);
 
 /* Used for readdir() */
-void btrfs_get_delayed_items(struct inode *inode, struct list_head *ins_list,
-                             struct list_head *del_list);
-void btrfs_put_delayed_items(struct list_head *ins_list,
-                             struct list_head *del_list);
+bool btrfs_readdir_get_delayed_items(struct inode *inode,
+                                     struct list_head *ins_list,
+                                     struct list_head *del_list);
+void btrfs_readdir_put_delayed_items(struct inode *inode,
+                                     struct list_head *ins_list,
+                                     struct list_head *del_list);
 int btrfs_should_delete_dir_index(struct list_head *del_list,
                                   u64 index);
 int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 6628fca9f4ed..60ce1190307b 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1098,7 +1098,7 @@ void readahead_tree_block(struct btrfs_root *root, u64 bytenr)
         struct inode *btree_inode = root->fs_info->btree_inode;
 
         buf = btrfs_find_create_tree_block(root, bytenr);
-        if (!buf)
+        if (IS_ERR(buf))
                 return;
         read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,
                                  buf, 0, WAIT_NONE, btree_get_extent, 0);
@@ -1114,7 +1114,7 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr,
         int ret;
 
         buf = btrfs_find_create_tree_block(root, bytenr);
-        if (!buf)
+        if (IS_ERR(buf))
                 return 0;
 
         set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags);
@@ -1147,7 +1147,8 @@ struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
                                                  u64 bytenr)
 {
         if (btrfs_test_is_dummy_root(root))
-                return alloc_test_extent_buffer(root->fs_info, bytenr);
+                return alloc_test_extent_buffer(root->fs_info, bytenr,
+                                root->nodesize);
         return alloc_extent_buffer(root->fs_info, bytenr);
 }
 
@@ -1171,8 +1172,8 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
         int ret;
 
         buf = btrfs_find_create_tree_block(root, bytenr);
-        if (!buf)
-                return ERR_PTR(-ENOMEM);
+        if (IS_ERR(buf))
+                return buf;
 
         ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
         if (ret) {
@@ -1314,14 +1315,16 @@ static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info,
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 /* Should only be used by the testing infrastructure */
-struct btrfs_root *btrfs_alloc_dummy_root(void)
+struct btrfs_root *btrfs_alloc_dummy_root(u32 sectorsize, u32 nodesize)
 {
         struct btrfs_root *root;
 
         root = btrfs_alloc_root(NULL, GFP_KERNEL);
         if (!root)
                 return ERR_PTR(-ENOMEM);
-        __setup_root(4096, 4096, 4096, root, NULL, 1);
+        /* We don't use the stripesize in selftest, set it as sectorsize */
+        __setup_root(nodesize, sectorsize, sectorsize, root, NULL,
+                        BTRFS_ROOT_TREE_OBJECTID);
         set_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state);
         root->alloc_bytenr = 0;
 
@@ -1803,6 +1806,13 @@ static int cleaner_kthread(void *arg)
                 if (btrfs_need_cleaner_sleep(root))
                         goto sleep;
 
+                /*
+                 * Do not do anything if we might cause open_ctree() to block
+                 * before we have finished mounting the filesystem.
+                 */
+                if (!root->fs_info->open)
+                        goto sleep;
+
                 if (!mutex_trylock(&root->fs_info->cleaner_mutex))
                         goto sleep;
 
@@ -2517,7 +2527,6 @@ int open_ctree(struct super_block *sb,
         int num_backups_tried = 0;
         int backup_index = 0;
         int max_active;
-        bool cleaner_mutex_locked = false;
 
         tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
         chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
@@ -2797,7 +2806,7 @@ int open_ctree(struct super_block *sb,
 
         nodesize = btrfs_super_nodesize(disk_super);
         sectorsize = btrfs_super_sectorsize(disk_super);
-        stripesize = btrfs_super_stripesize(disk_super);
+        stripesize = sectorsize;
         fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids));
         fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids));
 
@@ -2996,13 +3005,6 @@ retry_root_backup:
                 goto fail_sysfs;
         }
 
-        /*
-         * Hold the cleaner_mutex thread here so that we don't block
-         * for a long time on btrfs_recover_relocation.  cleaner_kthread
-         * will wait for us to finish mounting the filesystem.
-         */
-        mutex_lock(&fs_info->cleaner_mutex);
-        cleaner_mutex_locked = true;
         fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root,
                                                "btrfs-cleaner");
         if (IS_ERR(fs_info->cleaner_kthread))
@@ -3062,8 +3064,10 @@ retry_root_backup:
                 ret = btrfs_cleanup_fs_roots(fs_info);
                 if (ret)
                         goto fail_qgroup;
-                /* We locked cleaner_mutex before creating cleaner_kthread. */
+
+                mutex_lock(&fs_info->cleaner_mutex);
                 ret = btrfs_recover_relocation(tree_root);
+                mutex_unlock(&fs_info->cleaner_mutex);
                 if (ret < 0) {
                         btrfs_warn(fs_info, "failed to recover relocation: %d",
                                         ret);
@@ -3071,8 +3075,6 @@ retry_root_backup:
                         goto fail_qgroup;
                 }
         }
-        mutex_unlock(&fs_info->cleaner_mutex);
-        cleaner_mutex_locked = false;
 
         location.objectid = BTRFS_FS_TREE_OBJECTID;
         location.type = BTRFS_ROOT_ITEM_KEY;
@@ -3186,10 +3188,6 @@ fail_cleaner:
         filemap_write_and_wait(fs_info->btree_inode->i_mapping);
 
 fail_sysfs:
-        if (cleaner_mutex_locked) {
-                mutex_unlock(&fs_info->cleaner_mutex);
-                cleaner_mutex_locked = false;
-        }
         btrfs_sysfs_remove_mounted(fs_info);
 
 fail_fsdev_sysfs:
@@ -4130,6 +4128,16 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
          * Hint to catch really bogus numbers, bitflips or so, more exact checks are
          * done later
          */
+        if (btrfs_super_bytes_used(sb) < 6 * btrfs_super_nodesize(sb)) {
+                btrfs_err(fs_info, "bytes_used is too small %llu",
+                       btrfs_super_bytes_used(sb));
+                ret = -EINVAL;
+        }
+        if (!is_power_of_2(btrfs_super_stripesize(sb))) {
+                btrfs_err(fs_info, "invalid stripesize %u",
+                       btrfs_super_stripesize(sb));
+                ret = -EINVAL;
+        }
         if (btrfs_super_num_devices(sb) > (1UL << 31))
                 printk(KERN_WARNING "BTRFS: suspicious number of devices: %llu\n",
                                 btrfs_super_num_devices(sb));
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 8e79d0070bcf..acba821499a9 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -90,7 +90,7 @@ void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info,
 void btrfs_free_fs_root(struct btrfs_root *root);
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
-struct btrfs_root *btrfs_alloc_dummy_root(void);
+struct btrfs_root *btrfs_alloc_dummy_root(u32 sectorsize, u32 nodesize);
 #endif
 
 /*
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 689d25ac6a68..82b912a293ab 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2835,6 +2835,7 @@ int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
 
 struct async_delayed_refs {
         struct btrfs_root *root;
+        u64 transid;
         int count;
         int error;
         int sync;
@@ -2850,6 +2851,10 @@ static void delayed_ref_async_start(struct btrfs_work *work)
 
         async = container_of(work, struct async_delayed_refs, work);
 
+        /* if the commit is already started, we don't need to wait here */
+        if (btrfs_transaction_blocked(async->root->fs_info))
+                goto done;
+
         trans = btrfs_join_transaction(async->root);
         if (IS_ERR(trans)) {
                 async->error = PTR_ERR(trans);
@@ -2861,10 +2866,15 @@ static void delayed_ref_async_start(struct btrfs_work *work)
          * wait on delayed refs
          */
         trans->sync = true;
+
+        /* Don't bother flushing if we got into a different transaction */
+        if (trans->transid > async->transid)
+                goto end;
+
         ret = btrfs_run_delayed_refs(trans, async->root, async->count);
         if (ret)
                 async->error = ret;
-
+end:
         ret = btrfs_end_transaction(trans, async->root);
         if (ret && !async->error)
                 async->error = ret;
@@ -2876,7 +2886,7 @@ done:
 }
 
 int btrfs_async_run_delayed_refs(struct btrfs_root *root,
-                                 unsigned long count, int wait)
+                                 unsigned long count, u64 transid, int wait)
 {
         struct async_delayed_refs *async;
         int ret;
@@ -2888,6 +2898,7 @@ int btrfs_async_run_delayed_refs(struct btrfs_root *root,
         async->root = root->fs_info->tree_root;
         async->count = count;
         async->error = 0;
+        async->transid = transid;
         if (wait)
                 async->sync = 1;
         else
@@ -8016,8 +8027,9 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
         struct extent_buffer *buf;
 
         buf = btrfs_find_create_tree_block(root, bytenr);
-        if (!buf)
-                return ERR_PTR(-ENOMEM);
+        if (IS_ERR(buf))
+                return buf;
+
         btrfs_set_header_generation(buf, trans->transid);
         btrfs_set_buffer_lockdep_class(root->root_key.objectid, buf, level);
         btrfs_tree_lock(buf);
@@ -8044,7 +8056,7 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                 set_extent_dirty(&trans->transaction->dirty_pages, buf->start,
                          buf->start + buf->len - 1, GFP_NOFS);
         }
-        trans->blocks_used++;
+        trans->dirty = true;
         /* this returns a buffer locked for blocking */
         return buf;
 }
@@ -8659,8 +8671,9 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
         next = btrfs_find_tree_block(root->fs_info, bytenr);
         if (!next) {
                 next = btrfs_find_create_tree_block(root, bytenr);
-                if (!next)
-                        return -ENOMEM;
+                if (IS_ERR(next))
+                        return PTR_ERR(next);
+
                 btrfs_set_buffer_lockdep_class(root->root_key.objectid, next,
                                                level - 1);
                 reada = 1;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 6e953de83f08..75533adef998 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4728,16 +4728,16 @@ err:
 }
 
 struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
-                                                u64 start)
+                                                u64 start, u32 nodesize)
 {
         unsigned long len;
 
         if (!fs_info) {
                 /*
                  * Called only from tests that don't always have a fs_info
-                 * available, but we know that nodesize is 4096
+                 * available
                  */
-                len = 4096;
+                len = nodesize;
         } else {
                 len = fs_info->tree_root->nodesize;
         }
@@ -4833,7 +4833,7 @@ struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
-                                               u64 start)
+                                        u64 start, u32 nodesize)
 {
         struct extent_buffer *eb, *exists = NULL;
         int ret;
@@ -4841,7 +4841,7 @@ struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
         eb = find_extent_buffer(fs_info, start);
         if (eb)
                 return eb;
-        eb = alloc_dummy_extent_buffer(fs_info, start);
+        eb = alloc_dummy_extent_buffer(fs_info, start, nodesize);
         if (!eb)
                 return NULL;
         eb->fs_info = fs_info;
@@ -4892,18 +4892,25 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
         int uptodate = 1;
         int ret;
 
+        if (!IS_ALIGNED(start, fs_info->tree_root->sectorsize)) {
+                btrfs_err(fs_info, "bad tree block start %llu", start);
+                return ERR_PTR(-EINVAL);
+        }
+
         eb = find_extent_buffer(fs_info, start);
         if (eb)
                 return eb;
 
         eb = __alloc_extent_buffer(fs_info, start, len);
         if (!eb)
-                return NULL;
+                return ERR_PTR(-ENOMEM);
 
         for (i = 0; i < num_pages; i++, index++) {
                 p = find_or_create_page(mapping, index, GFP_NOFS|__GFP_NOFAIL);
-                if (!p)
+                if (!p) {
+                        exists = ERR_PTR(-ENOMEM);
                         goto free_eb;
+                }
 
                 spin_lock(&mapping->private_lock);
                 if (PagePrivate(p)) {
@@ -4948,8 +4955,10 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
                 set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags);
 again:
         ret = radix_tree_preload(GFP_NOFS);
-        if (ret)
+        if (ret) {
+                exists = ERR_PTR(ret);
                 goto free_eb;
+        }
 
         spin_lock(&fs_info->buffer_lock);
         ret = radix_tree_insert(&fs_info->buffer_radix,
@@ -5333,6 +5342,11 @@ int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dstv,
         return ret;
 }
 
+/*
+ * return 0 if the item is found within a page.
+ * return 1 if the item spans two pages.
+ * return -EINVAL otherwise.
+ */
 int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
                                unsigned long min_len, char **map,
                                unsigned long *map_start,
@@ -5347,7 +5361,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
                 PAGE_SHIFT;
 
         if (i != end_i)
-                return -EINVAL;
+                return 1;
 
         if (i == 0) {
                 offset = start_offset;
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 1baf19c9b79d..c0c1c4fef6ce 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -348,7 +348,7 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
 struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
                                                   u64 start, unsigned long len);
 struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
-                                                u64 start);
+                                                u64 start, u32 nodesize);
 struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
 struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
                                          u64 start);
@@ -468,5 +468,5 @@ noinline u64 find_lock_delalloc_range(struct inode *inode,
                                       u64 *end, u64 max_bytes);
 #endif
 struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
-                                               u64 start);
+                                               u64 start, u32 nodesize);
 #endif
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e0c9bd3fb02d..2234e88cf674 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1534,30 +1534,30 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
                 reserve_bytes = round_up(write_bytes + sector_offset,
                                 root->sectorsize);
 
-                if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
-                                              BTRFS_INODE_PREALLOC)) &&
-                    check_can_nocow(inode, pos, &write_bytes) > 0) {
-                        /*
-                         * For nodata cow case, no need to reserve
-                         * data space.
-                         */
-                        only_release_metadata = true;
-                        /*
-                         * our prealloc extent may be smaller than
-                         * write_bytes, so scale down.
-                         */
-                        num_pages = DIV_ROUND_UP(write_bytes + offset,
-                                                 PAGE_SIZE);
-                        reserve_bytes = round_up(write_bytes + sector_offset,
-                                        root->sectorsize);
-                        goto reserve_metadata;
-                }
-
                 ret = btrfs_check_data_free_space(inode, pos, write_bytes);
-                if (ret < 0)
-                        break;
+                if (ret < 0) {
+                        if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
+                                                      BTRFS_INODE_PREALLOC)) &&
+                            check_can_nocow(inode, pos, &write_bytes) > 0) {
+                                /*
+                                 * For nodata cow case, no need to reserve
+                                 * data space.
+                                 */
+                                only_release_metadata = true;
+                                /*
+                                 * our prealloc extent may be smaller than
+                                 * write_bytes, so scale down.
+                                 */
+                                num_pages = DIV_ROUND_UP(write_bytes + offset,
+                                                         PAGE_SIZE);
+                                reserve_bytes = round_up(write_bytes +
+                                                         sector_offset,
+                                                         root->sectorsize);
+                        } else {
+                                break;
+                        }
+                }
 
-reserve_metadata:
                 ret = btrfs_delalloc_reserve_metadata(inode, reserve_bytes);
                 if (ret) {
                         if (!only_release_metadata)
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index c6dc1183f542..69d270f6602c 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -29,7 +29,7 @@
 #include "inode-map.h"
 #include "volumes.h"
 
-#define BITS_PER_BITMAP         (PAGE_SIZE * 8)
+#define BITS_PER_BITMAP         (PAGE_SIZE * 8UL)
 #define MAX_CACHE_BYTES_PER_GIG SZ_32K
 
 struct btrfs_trim_range {
@@ -1415,11 +1415,11 @@ static inline u64 offset_to_bitmap(struct btrfs_free_space_ctl *ctl,
                                    u64 offset)
 {
         u64 bitmap_start;
-        u32 bytes_per_bitmap;
+        u64 bytes_per_bitmap;
 
         bytes_per_bitmap = BITS_PER_BITMAP * ctl->unit;
         bitmap_start = offset - ctl->start;
-        bitmap_start = div_u64(bitmap_start, bytes_per_bitmap);
+        bitmap_start = div64_u64(bitmap_start, bytes_per_bitmap);
         bitmap_start *= bytes_per_bitmap;
         bitmap_start += ctl->start;
 
@@ -1638,10 +1638,10 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
         u64 bitmap_bytes;
         u64 extent_bytes;
         u64 size = block_group->key.offset;
-        u32 bytes_per_bg = BITS_PER_BITMAP * ctl->unit;
-        u32 max_bitmaps = div_u64(size + bytes_per_bg - 1, bytes_per_bg);
+        u64 bytes_per_bg = BITS_PER_BITMAP * ctl->unit;
+        u64 max_bitmaps = div64_u64(size + bytes_per_bg - 1, bytes_per_bg);
 
-        max_bitmaps = max_t(u32, max_bitmaps, 1);
+        max_bitmaps = max_t(u64, max_bitmaps, 1);
 
         ASSERT(ctl->total_bitmaps <= max_bitmaps);
 
@@ -1660,7 +1660,7 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
          * sure we don't go over our overall goal of MAX_CACHE_BYTES_PER_GIG as
          * we add more bitmaps.
          */
-        bitmap_bytes = (ctl->total_bitmaps + 1) * PAGE_SIZE;
+        bitmap_bytes = (ctl->total_bitmaps + 1) * ctl->unit;
 
         if (bitmap_bytes >= max_bytes) {
                 ctl->extents_thresh = 0;
@@ -3662,7 +3662,7 @@ have_info:
                         if (tmp->offset + tmp->bytes < offset)
                                 break;
                         if (offset + bytes < tmp->offset) {
-                                n = rb_prev(&info->offset_index);
+                                n = rb_prev(&tmp->offset_index);
                                 continue;
                         }
                         info = tmp;
@@ -3676,7 +3676,7 @@ have_info:
                         if (offset + bytes < tmp->offset)
                                 break;
                         if (tmp->offset + tmp->bytes < offset) {
-                                n = rb_next(&info->offset_index);
+                                n = rb_next(&tmp->offset_index);
                                 continue;
                         }
                         info = tmp;
diff --git a/fs/btrfs/hash.c b/fs/btrfs/hash.c
index aae520b2aee5..a97fdc156a03 100644
--- a/fs/btrfs/hash.c
+++ b/fs/btrfs/hash.c
@@ -24,6 +24,11 @@ int __init btrfs_hash_init(void)
         return PTR_ERR_OR_ZERO(tfm);
 }
 
+const char* btrfs_crc32c_impl(void)
+{
+        return crypto_tfm_alg_driver_name(crypto_shash_tfm(tfm));
+}
+
 void btrfs_hash_exit(void)
 {
         crypto_free_shash(tfm);
diff --git a/fs/btrfs/hash.h b/fs/btrfs/hash.h
index 118a2316e5d3..c3a2ec554361 100644
--- a/fs/btrfs/hash.h
+++ b/fs/btrfs/hash.h
@@ -22,6 +22,7 @@
 int __init btrfs_hash_init(void);
 
 void btrfs_hash_exit(void);
+const char* btrfs_crc32c_impl(void);
 
 u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length);
 
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 8b1212e8f7a8..4421954720b8 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3271,7 +3271,16 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode)
         /* grab metadata reservation from transaction handle */
         if (reserve) {
                 ret = btrfs_orphan_reserve_metadata(trans, inode);
-                BUG_ON(ret); /* -ENOSPC in reservation; Logic error? JDM */
+                ASSERT(!ret);
+                if (ret) {
+                        atomic_dec(&root->orphan_inodes);
+                        clear_bit(BTRFS_INODE_ORPHAN_META_RESERVED,
+                                  &BTRFS_I(inode)->runtime_flags);
+                        if (insert)
+                                clear_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
+                                          &BTRFS_I(inode)->runtime_flags);
+                        return ret;
+                }
         }
 
         /* insert an orphan item to track this unlinked/truncated file */
@@ -4549,6 +4558,7 @@ delete:
                         BUG_ON(ret);
                         if (btrfs_should_throttle_delayed_refs(trans, root))
                                 btrfs_async_run_delayed_refs(root,
+                                                             trans->transid,
                                         trans->delayed_ref_updates * 2, 0);
                         if (be_nice) {
                                 if (truncate_space_check(trans, root,
@@ -5748,6 +5758,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
         int name_len;
         int is_curr = 0;        /* ctx->pos points to the current index? */
         bool emitted;
+        bool put = false;
 
         /* FIXME, use a real flag for deciding about the key type */
         if (root->fs_info->tree_root == root)
@@ -5765,7 +5776,8 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
         if (key_type == BTRFS_DIR_INDEX_KEY) {
                 INIT_LIST_HEAD(&ins_list);
                 INIT_LIST_HEAD(&del_list);
-                btrfs_get_delayed_items(inode, &ins_list, &del_list);
+                put = btrfs_readdir_get_delayed_items(inode, &ins_list,
+                                                      &del_list);
         }
 
         key.type = key_type;
@@ -5912,8 +5924,8 @@ next:
 nopos:
         ret = 0;
 err:
-        if (key_type == BTRFS_DIR_INDEX_KEY)
-                btrfs_put_delayed_items(&ins_list, &del_list);
+        if (put)
+                btrfs_readdir_put_delayed_items(inode, &ins_list, &del_list);
         btrfs_free_path(path);
         return ret;
 }
@@ -10525,7 +10537,7 @@ static const struct inode_operations btrfs_dir_ro_inode_operations = {
 static const struct file_operations btrfs_dir_file_operations = {
         .llseek         = generic_file_llseek,
         .read           = generic_read_dir,
-        .iterate        = btrfs_real_readdir,
+        .iterate_shared = btrfs_real_readdir,
         .unlocked_ioctl = btrfs_ioctl,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = btrfs_compat_ioctl,
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index e96634a725c3..aca8264f4a49 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -968,6 +968,7 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
         struct rb_node *prev = NULL;
         struct btrfs_ordered_extent *test;
         int ret = 1;
+        u64 orig_offset = offset;
 
         spin_lock_irq(&tree->lock);
         if (ordered) {
@@ -983,7 +984,7 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
 
         /* truncate file */
         if (disk_i_size > i_size) {
-                BTRFS_I(inode)->disk_i_size = i_size;
+                BTRFS_I(inode)->disk_i_size = orig_offset;
                 ret = 0;
                 goto out;
         }
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 4e59a91a11e0..60e7179ed4b7 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -235,7 +235,7 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
         trans->aborted = errno;
         /* Nothing used. The other threads that have joined this
          * transaction may be able to continue. */
-        if (!trans->blocks_used && list_empty(&trans->new_bgs)) {
+        if (!trans->dirty && list_empty(&trans->new_bgs)) {
                 const char *errstr;
 
                 errstr = btrfs_decode_error(errno);
@@ -1807,6 +1807,8 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
                         }
                 }
                 sb->s_flags &= ~MS_RDONLY;
+
+                fs_info->open = 1;
         }
 out:
         wake_up_process(fs_info->transaction_kthread);
@@ -2303,7 +2305,7 @@ static void btrfs_interface_exit(void)
 
 static void btrfs_print_mod_info(void)
 {
-        printk(KERN_INFO "Btrfs loaded"
+        printk(KERN_INFO "Btrfs loaded, crc32c=%s"
 #ifdef CONFIG_BTRFS_DEBUG
                         ", debug=on"
 #endif
@@ -2313,33 +2315,48 @@ static void btrfs_print_mod_info(void)
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
                         ", integrity-checker=on"
 #endif
-                        "\n");
+                        "\n",
+                        btrfs_crc32c_impl());
 }
 
 static int btrfs_run_sanity_tests(void)
 {
-        int ret;
-
+        int ret, i;
+        u32 sectorsize, nodesize;
+        u32 test_sectorsize[] = {
+                PAGE_SIZE,
+        };
         ret = btrfs_init_test_fs();
         if (ret)
                 return ret;
-
-        ret = btrfs_test_free_space_cache();
-        if (ret)
-                goto out;
-        ret = btrfs_test_extent_buffer_operations();
-        if (ret)
-                goto out;
-        ret = btrfs_test_extent_io();
-        if (ret)
-                goto out;
-        ret = btrfs_test_inodes();
-        if (ret)
-                goto out;
-        ret = btrfs_test_qgroups();
-        if (ret)
-                goto out;
-        ret = btrfs_test_free_space_tree();
+        for (i = 0; i < ARRAY_SIZE(test_sectorsize); i++) {
+                sectorsize = test_sectorsize[i];
+                for (nodesize = sectorsize;
+                     nodesize <= BTRFS_MAX_METADATA_BLOCKSIZE;
+                     nodesize <<= 1) {
+                        pr_info("BTRFS: selftest: sectorsize: %u  nodesize: %u\n",
+                                sectorsize, nodesize);
+                        ret = btrfs_test_free_space_cache(sectorsize, nodesize);
+                        if (ret)
+                                goto out;
+                        ret = btrfs_test_extent_buffer_operations(sectorsize,
+                                nodesize);
+                        if (ret)
+                                goto out;
+                        ret = btrfs_test_extent_io(sectorsize, nodesize);
+                        if (ret)
+                                goto out;
+                        ret = btrfs_test_inodes(sectorsize, nodesize);
+                        if (ret)
+                                goto out;
+                        ret = btrfs_test_qgroups(sectorsize, nodesize);
+                        if (ret)
+                                goto out;
+                        ret = btrfs_test_free_space_tree(sectorsize, nodesize);
+                        if (ret)
+                                goto out;
+                }
+        }
 out:
         btrfs_destroy_test_fs();
         return ret;
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
index f54bf450bad3..02223f3f78f4 100644
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -68,7 +68,7 @@ int btrfs_init_test_fs(void)
         if (IS_ERR(test_mnt)) {
                 printk(KERN_ERR "btrfs: cannot mount test file system\n");
                 unregister_filesystem(&test_type);
-                return ret;
+                return PTR_ERR(test_mnt);
         }
         return 0;
 }
@@ -175,7 +175,7 @@ void btrfs_free_dummy_root(struct btrfs_root *root)
 }
 
 struct btrfs_block_group_cache *
-btrfs_alloc_dummy_block_group(unsigned long length)
+btrfs_alloc_dummy_block_group(unsigned long length, u32 sectorsize)
 {
         struct btrfs_block_group_cache *cache;
 
@@ -192,8 +192,8 @@ btrfs_alloc_dummy_block_group(unsigned long length)
         cache->key.objectid = 0;
         cache->key.offset = length;
         cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
-        cache->sectorsize = 4096;
-        cache->full_stripe_len = 4096;
+        cache->sectorsize = sectorsize;
+        cache->full_stripe_len = sectorsize;
 
         INIT_LIST_HEAD(&cache->list);
         INIT_LIST_HEAD(&cache->cluster_list);
diff --git a/fs/btrfs/tests/btrfs-tests.h b/fs/btrfs/tests/btrfs-tests.h
index 054b8c73c951..66fb6b701eb7 100644
--- a/fs/btrfs/tests/btrfs-tests.h
+++ b/fs/btrfs/tests/btrfs-tests.h
@@ -26,27 +26,28 @@
 struct btrfs_root;
 struct btrfs_trans_handle;
 
-int btrfs_test_free_space_cache(void);
-int btrfs_test_extent_buffer_operations(void);
-int btrfs_test_extent_io(void);
-int btrfs_test_inodes(void);
-int btrfs_test_qgroups(void);
-int btrfs_test_free_space_tree(void);
+int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize);
+int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize);
+int btrfs_test_extent_io(u32 sectorsize, u32 nodesize);
+int btrfs_test_inodes(u32 sectorsize, u32 nodesize);
+int btrfs_test_qgroups(u32 sectorsize, u32 nodesize);
+int btrfs_test_free_space_tree(u32 sectorsize, u32 nodesize);
 int btrfs_init_test_fs(void);
 void btrfs_destroy_test_fs(void);
 struct inode *btrfs_new_test_inode(void);
 struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(void);
 void btrfs_free_dummy_root(struct btrfs_root *root);
 struct btrfs_block_group_cache *
-btrfs_alloc_dummy_block_group(unsigned long length);
+btrfs_alloc_dummy_block_group(unsigned long length, u32 sectorsize);
 void btrfs_free_dummy_block_group(struct btrfs_block_group_cache *cache);
 void btrfs_init_dummy_trans(struct btrfs_trans_handle *trans);
 #else
-static inline int btrfs_test_free_space_cache(void)
+static inline int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize)
 {
         return 0;
 }
-static inline int btrfs_test_extent_buffer_operations(void)
+static inline int btrfs_test_extent_buffer_operations(u32 sectorsize,
+        u32 nodesize)
 {
         return 0;
 }
@@ -57,19 +58,19 @@ static inline int btrfs_init_test_fs(void)
 static inline void btrfs_destroy_test_fs(void)
 {
 }
-static inline int btrfs_test_extent_io(void)
+static inline int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
 {
         return 0;
 }
-static inline int btrfs_test_inodes(void)
+static inline int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
 {
         return 0;
 }
-static inline int btrfs_test_qgroups(void)
+static inline int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 {
         return 0;
 }
-static inline int btrfs_test_free_space_tree(void)
+static inline int btrfs_test_free_space_tree(u32 sectorsize, u32 nodesize)
 {
         return 0;
 }
diff --git a/fs/btrfs/tests/extent-buffer-tests.c b/fs/btrfs/tests/extent-buffer-tests.c
index f51963a8f929..4f8cbd1ec5ee 100644
--- a/fs/btrfs/tests/extent-buffer-tests.c
+++ b/fs/btrfs/tests/extent-buffer-tests.c
@@ -22,7 +22,7 @@
 #include "../extent_io.h"
 #include "../disk-io.h"
 
-static int test_btrfs_split_item(void)
+static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
 {
         struct btrfs_path *path;
         struct btrfs_root *root;
@@ -40,7 +40,7 @@ static int test_btrfs_split_item(void)
 
         test_msg("Running btrfs_split_item tests\n");
 
-        root = btrfs_alloc_dummy_root();
+        root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(root)) {
                 test_msg("Could not allocate root\n");
                 return PTR_ERR(root);
@@ -53,7 +53,8 @@ static int test_btrfs_split_item(void)
                 return -ENOMEM;
         }
 
-        path->nodes[0] = eb = alloc_dummy_extent_buffer(NULL, 4096);
+        path->nodes[0] = eb = alloc_dummy_extent_buffer(NULL, nodesize,
+                                                        nodesize);
         if (!eb) {
                 test_msg("Could not allocate dummy buffer\n");
                 ret = -ENOMEM;
@@ -222,8 +223,8 @@ out:
         return ret;
 }
 
-int btrfs_test_extent_buffer_operations(void)
+int btrfs_test_extent_buffer_operations(u32 sectorsize, u32 nodesize)
 {
-        test_msg("Running extent buffer operation tests");
-        return test_btrfs_split_item();
+        test_msg("Running extent buffer operation tests\n");
+        return test_btrfs_split_item(sectorsize, nodesize);
 }
diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
index 55724607f79b..d19ab0317283 100644
--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -21,6 +21,7 @@
 #include <linux/slab.h>
 #include <linux/sizes.h>
 #include "btrfs-tests.h"
+#include "../ctree.h"
 #include "../extent_io.h"
 
 #define PROCESS_UNLOCK          (1 << 0)
@@ -65,7 +66,7 @@ static noinline int process_page_range(struct inode *inode, u64 start, u64 end,
         return count;
 }
 
-static int test_find_delalloc(void)
+static int test_find_delalloc(u32 sectorsize)
 {
         struct inode *inode;
         struct extent_io_tree tmp;
@@ -113,7 +114,7 @@ static int test_find_delalloc(void)
          * |--- delalloc ---|
          * |---  search  ---|
          */
-        set_extent_delalloc(&tmp, 0, 4095, NULL);
+        set_extent_delalloc(&tmp, 0, sectorsize - 1, NULL);
         start = 0;
         end = 0;
         found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
@@ -122,9 +123,9 @@ static int test_find_delalloc(void)
                 test_msg("Should have found at least one delalloc\n");
                 goto out_bits;
         }
-        if (start != 0 || end != 4095) {
-                test_msg("Expected start 0 end 4095, got start %Lu end %Lu\n",
-                         start, end);
+        if (start != 0 || end != (sectorsize - 1)) {
+                test_msg("Expected start 0 end %u, got start %llu end %llu\n",
+                        sectorsize - 1, start, end);
                 goto out_bits;
         }
         unlock_extent(&tmp, start, end);
@@ -144,7 +145,7 @@ static int test_find_delalloc(void)
                 test_msg("Couldn't find the locked page\n");
                 goto out_bits;
         }
-        set_extent_delalloc(&tmp, 4096, max_bytes - 1, NULL);
+        set_extent_delalloc(&tmp, sectorsize, max_bytes - 1, NULL);
         start = test_start;
         end = 0;
         found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
@@ -172,7 +173,7 @@ static int test_find_delalloc(void)
          * |--- delalloc ---|
          *                    |--- search ---|
          */
-        test_start = max_bytes + 4096;
+        test_start = max_bytes + sectorsize;
         locked_page = find_lock_page(inode->i_mapping, test_start >>
                                      PAGE_SHIFT);
         if (!locked_page) {
@@ -272,6 +273,16 @@ out:
         return ret;
 }
 
+/**
+ * test_bit_in_byte - Determine whether a bit is set in a byte
+ * @nr: bit number to test
+ * @addr: Address to start counting from
+ */
+static inline int test_bit_in_byte(int nr, const u8 *addr)
+{
+        return 1UL & (addr[nr / BITS_PER_BYTE] >> (nr & (BITS_PER_BYTE - 1)));
+}
+
 static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
                              unsigned long len)
 {
@@ -298,25 +309,29 @@ static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
                 return -EINVAL;
         }
 
-        bitmap_set(bitmap, (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
-                   sizeof(long) * BITS_PER_BYTE);
-        extent_buffer_bitmap_set(eb, PAGE_SIZE - sizeof(long) / 2, 0,
-                                 sizeof(long) * BITS_PER_BYTE);
-        if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
-                test_msg("Setting straddling pages failed\n");
-                return -EINVAL;
-        }
+        /* Straddling pages test */
+        if (len > PAGE_SIZE) {
+                bitmap_set(bitmap,
+                        (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
+                        sizeof(long) * BITS_PER_BYTE);
+                extent_buffer_bitmap_set(eb, PAGE_SIZE - sizeof(long) / 2, 0,
+                                        sizeof(long) * BITS_PER_BYTE);
+                if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+                        test_msg("Setting straddling pages failed\n");
+                        return -EINVAL;
+                }
 
-        bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
-        bitmap_clear(bitmap,
-                     (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
-                     sizeof(long) * BITS_PER_BYTE);
-        extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
-        extent_buffer_bitmap_clear(eb, PAGE_SIZE - sizeof(long) / 2, 0,
-                                   sizeof(long) * BITS_PER_BYTE);
-        if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
-                test_msg("Clearing straddling pages failed\n");
-                return -EINVAL;
+                bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
+                bitmap_clear(bitmap,
+                        (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
+                        sizeof(long) * BITS_PER_BYTE);
+                extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
+                extent_buffer_bitmap_clear(eb, PAGE_SIZE - sizeof(long) / 2, 0,
+                                        sizeof(long) * BITS_PER_BYTE);
+                if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
+                        test_msg("Clearing straddling pages failed\n");
+                        return -EINVAL;
+                }
         }
 
         /*
@@ -333,7 +348,7 @@ static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
         for (i = 0; i < len * BITS_PER_BYTE; i++) {
                 int bit, bit1;
 
-                bit = !!test_bit(i, bitmap);
+                bit = !!test_bit_in_byte(i, (u8 *)bitmap);
                 bit1 = !!extent_buffer_test_bit(eb, 0, i);
                 if (bit1 != bit) {
                         test_msg("Testing bit pattern failed\n");
@@ -351,15 +366,22 @@ static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
         return 0;
 }
 
-static int test_eb_bitmaps(void)
+static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
 {
-        unsigned long len = PAGE_SIZE * 4;
+        unsigned long len;
         unsigned long *bitmap;
         struct extent_buffer *eb;
         int ret;
 
         test_msg("Running extent buffer bitmap tests\n");
 
+        /*
+         * In ppc64, sectorsize can be 64K, thus 4 * 64K will be larger than
+         * BTRFS_MAX_METADATA_BLOCKSIZE.
+         */
+        len = (sectorsize < BTRFS_MAX_METADATA_BLOCKSIZE)
+                ? sectorsize * 4 : sectorsize;
+
         bitmap = kmalloc(len, GFP_KERNEL);
         if (!bitmap) {
                 test_msg("Couldn't allocate test bitmap\n");
@@ -379,7 +401,7 @@ static int test_eb_bitmaps(void)
 
         /* Do it over again with an extent buffer which isn't page-aligned. */
         free_extent_buffer(eb);
-        eb = __alloc_dummy_extent_buffer(NULL, PAGE_SIZE / 2, len);
+        eb = __alloc_dummy_extent_buffer(NULL, nodesize / 2, len);
         if (!eb) {
                 test_msg("Couldn't allocate test extent buffer\n");
                 kfree(bitmap);
@@ -393,17 +415,17 @@ out:
         return ret;
 }
 
-int btrfs_test_extent_io(void)
+int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
 {
         int ret;
 
         test_msg("Running extent I/O tests\n");
 
-        ret = test_find_delalloc();
+        ret = test_find_delalloc(sectorsize);
         if (ret)
                 goto out;
 
-        ret = test_eb_bitmaps();
+        ret = test_eb_bitmaps(sectorsize, nodesize);
 out:
         test_msg("Extent I/O tests finished\n");
         return ret;
diff --git a/fs/btrfs/tests/free-space-tests.c b/fs/btrfs/tests/free-space-tests.c
index 0eeb8f3d6b67..3956bb2ff84c 100644
--- a/fs/btrfs/tests/free-space-tests.c
+++ b/fs/btrfs/tests/free-space-tests.c
@@ -22,7 +22,7 @@
 #include "../disk-io.h"
 #include "../free-space-cache.h"
 
-#define BITS_PER_BITMAP         (PAGE_SIZE * 8)
+#define BITS_PER_BITMAP         (PAGE_SIZE * 8UL)
 
 /*
  * This test just does basic sanity checking, making sure we can add an extent
@@ -99,7 +99,8 @@ static int test_extents(struct btrfs_block_group_cache *cache)
         return 0;
 }
 
-static int test_bitmaps(struct btrfs_block_group_cache *cache)
+static int test_bitmaps(struct btrfs_block_group_cache *cache,
+                        u32 sectorsize)
 {
         u64 next_bitmap_offset;
         int ret;
@@ -139,7 +140,7 @@ static int test_bitmaps(struct btrfs_block_group_cache *cache)
          * The first bitmap we have starts at offset 0 so the next one is just
          * at the end of the first bitmap.
          */
-        next_bitmap_offset = (u64)(BITS_PER_BITMAP * 4096);
+        next_bitmap_offset = (u64)(BITS_PER_BITMAP * sectorsize);
 
         /* Test a bit straddling two bitmaps */
         ret = test_add_free_space_entry(cache, next_bitmap_offset - SZ_2M,
@@ -167,9 +168,10 @@ static int test_bitmaps(struct btrfs_block_group_cache *cache)
 }
 
 /* This is the high grade jackassery */
-static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache)
+static int test_bitmaps_and_extents(struct btrfs_block_group_cache *cache,
+                                    u32 sectorsize)
 {
-        u64 bitmap_offset = (u64)(BITS_PER_BITMAP * 4096);
+        u64 bitmap_offset = (u64)(BITS_PER_BITMAP * sectorsize);
         int ret;
 
         test_msg("Running bitmap and extent tests\n");
@@ -401,7 +403,8 @@ static int check_cache_empty(struct btrfs_block_group_cache *cache)
  * requests.
  */
 static int
-test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
+test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache,
+                                       u32 sectorsize)
 {
         int ret;
         u64 offset;
@@ -539,7 +542,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
          * The goal is to test that the bitmap entry space stealing doesn't
          * steal this space region.
          */
-        ret = btrfs_add_free_space(cache, SZ_128M + SZ_16M, 4096);
+        ret = btrfs_add_free_space(cache, SZ_128M + SZ_16M, sectorsize);
         if (ret) {
                 test_msg("Error adding free space: %d\n", ret);
                 return ret;
@@ -597,8 +600,8 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
                 return -ENOENT;
         }
 
-        if (cache->free_space_ctl->free_space != (SZ_1M + 4096)) {
-                test_msg("Cache free space is not 1Mb + 4Kb\n");
+        if (cache->free_space_ctl->free_space != (SZ_1M + sectorsize)) {
+                test_msg("Cache free space is not 1Mb + %u\n", sectorsize);
                 return -EINVAL;
         }
 
@@ -611,22 +614,25 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
                 return -EINVAL;
         }
 
-        /* All that remains is a 4Kb free space region in a bitmap. Confirm. */
+        /*
+         * All that remains is a sectorsize free space region in a bitmap.
+         * Confirm.
+         */
         ret = check_num_extents_and_bitmaps(cache, 1, 1);
         if (ret)
                 return ret;
 
-        if (cache->free_space_ctl->free_space != 4096) {
-                test_msg("Cache free space is not 4Kb\n");
+        if (cache->free_space_ctl->free_space != sectorsize) {
+                test_msg("Cache free space is not %u\n", sectorsize);
                 return -EINVAL;
         }
 
         offset = btrfs_find_space_for_alloc(cache,
-                                            0, 4096, 0,
+                                            0, sectorsize, 0,
                                             &max_extent_size);
         if (offset != (SZ_128M + SZ_16M)) {
-                test_msg("Failed to allocate 4Kb from space cache, returned offset is: %llu\n",
-                         offset);
+                test_msg("Failed to allocate %u, returned offset : %llu\n",
+                         sectorsize, offset);
                 return -EINVAL;
         }
 
@@ -733,7 +739,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
          * The goal is to test that the bitmap entry space stealing doesn't
          * steal this space region.
          */
-        ret = btrfs_add_free_space(cache, SZ_32M, 8192);
+        ret = btrfs_add_free_space(cache, SZ_32M, 2 * sectorsize);
         if (ret) {
                 test_msg("Error adding free space: %d\n", ret);
                 return ret;
@@ -757,7 +763,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
 
         /*
          * Confirm that our extent entry didn't stole all free space from the
-         * bitmap, because of the small 8Kb free space region.
+         * bitmap, because of the small 2 * sectorsize free space region.
          */
         ret = check_num_extents_and_bitmaps(cache, 2, 1);
         if (ret)
@@ -783,8 +789,8 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
                 return -ENOENT;
         }
 
-        if (cache->free_space_ctl->free_space != (SZ_1M + 8192)) {
-                test_msg("Cache free space is not 1Mb + 8Kb\n");
+        if (cache->free_space_ctl->free_space != (SZ_1M + 2 * sectorsize)) {
+                test_msg("Cache free space is not 1Mb + %u\n", 2 * sectorsize);
                 return -EINVAL;
         }
 
@@ -796,21 +802,25 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
                 return -EINVAL;
         }
 
-        /* All that remains is a 8Kb free space region in a bitmap. Confirm. */
+        /*
+         * All that remains is 2 * sectorsize free space region
+         * in a bitmap. Confirm.
+         */
         ret = check_num_extents_and_bitmaps(cache, 1, 1);
         if (ret)
                 return ret;
 
-        if (cache->free_space_ctl->free_space != 8192) {
-                test_msg("Cache free space is not 8Kb\n");
+        if (cache->free_space_ctl->free_space != 2 * sectorsize) {
+                test_msg("Cache free space is not %u\n", 2 * sectorsize);
                 return -EINVAL;
         }
 
         offset = btrfs_find_space_for_alloc(cache,
-                                            0, 8192, 0,
+                                            0, 2 * sectorsize, 0,
                                             &max_extent_size);
         if (offset != SZ_32M) {
-                test_msg("Failed to allocate 8Kb from space cache, returned offset is: %llu\n",
+                test_msg("Failed to allocate %u, offset: %llu\n",
+                         2 * sectorsize,
                          offset);
                 return -EINVAL;
         }
@@ -825,7 +835,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache)
         return 0;
 }
 
-int btrfs_test_free_space_cache(void)
+int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize)
 {
         struct btrfs_block_group_cache *cache;
         struct btrfs_root *root = NULL;
@@ -833,13 +843,19 @@ int btrfs_test_free_space_cache(void)
 
         test_msg("Running btrfs free space cache tests\n");
 
-        cache = btrfs_alloc_dummy_block_group(1024 * 1024 * 1024);
+        /*
+         * For ppc64 (with 64k page size), bytes per bitmap might be
+         * larger than 1G.  To make bitmap test available in ppc64,
+         * alloc dummy block group whose size cross bitmaps.
+         */
+        cache = btrfs_alloc_dummy_block_group(BITS_PER_BITMAP * sectorsize
+                                        + PAGE_SIZE, sectorsize);
         if (!cache) {
                 test_msg("Couldn't run the tests\n");
                 return 0;
         }
 
-        root = btrfs_alloc_dummy_root();
+        root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(root)) {
                 ret = PTR_ERR(root);
                 goto out;
@@ -855,14 +871,14 @@ int btrfs_test_free_space_cache(void)
         ret = test_extents(cache);
         if (ret)
                 goto out;
-        ret = test_bitmaps(cache);
+        ret = test_bitmaps(cache, sectorsize);
         if (ret)
                 goto out;
-        ret = test_bitmaps_and_extents(cache);
+        ret = test_bitmaps_and_extents(cache, sectorsize);
         if (ret)
                 goto out;
 
-        ret = test_steal_space_from_bitmap_to_extent(cache);
+        ret = test_steal_space_from_bitmap_to_extent(cache, sectorsize);
 out:
         btrfs_free_dummy_block_group(cache);
         btrfs_free_dummy_root(root);
diff --git a/fs/btrfs/tests/free-space-tree-tests.c b/fs/btrfs/tests/free-space-tree-tests.c
index 7cea4462acd5..aac507085ab0 100644
--- a/fs/btrfs/tests/free-space-tree-tests.c
+++ b/fs/btrfs/tests/free-space-tree-tests.c
@@ -16,6 +16,7 @@
  * Boston, MA 021110-1307, USA.
  */
 
+#include <linux/types.h>
 #include "btrfs-tests.h"
 #include "../ctree.h"
 #include "../disk-io.h"
@@ -30,7 +31,7 @@ struct free_space_extent {
  * The test cases align their operations to this in order to hit some of the
  * edge cases in the bitmap code.
  */
-#define BITMAP_RANGE (BTRFS_FREE_SPACE_BITMAP_BITS * 4096)
+#define BITMAP_RANGE (BTRFS_FREE_SPACE_BITMAP_BITS * PAGE_SIZE)
 
 static int __check_free_space_extents(struct btrfs_trans_handle *trans,
                                       struct btrfs_fs_info *fs_info,
@@ -439,7 +440,8 @@ typedef int (*test_func_t)(struct btrfs_trans_handle *,
                            struct btrfs_block_group_cache *,
                            struct btrfs_path *);
 
-static int run_test(test_func_t test_func, int bitmaps)
+static int run_test(test_func_t test_func, int bitmaps,
+                u32 sectorsize, u32 nodesize)
 {
         struct btrfs_root *root = NULL;
         struct btrfs_block_group_cache *cache = NULL;
@@ -447,7 +449,7 @@ static int run_test(test_func_t test_func, int bitmaps)
         struct btrfs_path *path = NULL;
         int ret;
 
-        root = btrfs_alloc_dummy_root();
+        root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(root)) {
                 test_msg("Couldn't allocate dummy root\n");
                 ret = PTR_ERR(root);
@@ -466,7 +468,8 @@ static int run_test(test_func_t test_func, int bitmaps)
         root->fs_info->free_space_root = root;
         root->fs_info->tree_root = root;
 
-        root->node = alloc_test_extent_buffer(root->fs_info, 4096);
+        root->node = alloc_test_extent_buffer(root->fs_info,
+                nodesize, nodesize);
         if (!root->node) {
                 test_msg("Couldn't allocate dummy buffer\n");
                 ret = -ENOMEM;
@@ -474,9 +477,9 @@ static int run_test(test_func_t test_func, int bitmaps)
         }
         btrfs_set_header_level(root->node, 0);
         btrfs_set_header_nritems(root->node, 0);
-        root->alloc_bytenr += 8192;
+        root->alloc_bytenr += 2 * nodesize;
 
-        cache = btrfs_alloc_dummy_block_group(8 * BITMAP_RANGE);
+        cache = btrfs_alloc_dummy_block_group(8 * BITMAP_RANGE, sectorsize);
         if (!cache) {
                 test_msg("Couldn't allocate dummy block group cache\n");
                 ret = -ENOMEM;
@@ -534,17 +537,18 @@ out:
         return ret;
 }
 
-static int run_test_both_formats(test_func_t test_func)
+static int run_test_both_formats(test_func_t test_func,
+        u32 sectorsize, u32 nodesize)
 {
         int ret;
 
-        ret = run_test(test_func, 0);
+        ret = run_test(test_func, 0, sectorsize, nodesize);
         if (ret)
                 return ret;
-        return run_test(test_func, 1);
+        return run_test(test_func, 1, sectorsize, nodesize);
 }
 
-int btrfs_test_free_space_tree(void)
+int btrfs_test_free_space_tree(u32 sectorsize, u32 nodesize)
 {
         test_func_t tests[] = {
                 test_empty_block_group,
@@ -561,9 +565,11 @@ int btrfs_test_free_space_tree(void)
 
         test_msg("Running free space tree tests\n");
         for (i = 0; i < ARRAY_SIZE(tests); i++) {
-                int ret = run_test_both_formats(tests[i]);
+                int ret = run_test_both_formats(tests[i], sectorsize,
+                        nodesize);
                 if (ret) {
-                        test_msg("%pf failed\n", tests[i]);
+                        test_msg("%pf : sectorsize %u failed\n",
+                                tests[i], sectorsize);
                         return ret;
                 }
         }
diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c
index 8a25fe8b7c45..29648c0a39f1 100644
--- a/fs/btrfs/tests/inode-tests.c
+++ b/fs/btrfs/tests/inode-tests.c
@@ -16,6 +16,7 @@
  * Boston, MA 021110-1307, USA.
  */
 
+#include <linux/types.h>
 #include "btrfs-tests.h"
 #include "../ctree.h"
 #include "../btrfs_inode.h"
@@ -86,19 +87,19 @@ static void insert_inode_item_key(struct btrfs_root *root)
  * diagram of how the extents will look though this may not be possible we still
  * want to make sure everything acts normally (the last number is not inclusive)
  *
- * [0 - 5][5 -  6][6 - 10][10 - 4096][  4096 - 8192 ][8192 - 12288]
- * [hole ][inline][ hole ][ regular ][regular1 split][    hole    ]
+ * [0 - 5][5 -  6][     6 - 4096     ][ 4096 - 4100][4100 - 8195][8195 - 12291]
+ * [hole ][inline][hole but no extent][  hole   ][   regular ][regular1 split]
  *
- * [ 12288 - 20480][20480 - 24576][  24576 - 28672  ][28672 - 36864][36864 - 45056]
- * [regular1 split][   prealloc1 ][prealloc1 written][   prealloc1 ][ compressed  ]
+ * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
+ * [    hole    ][regular1 split][   prealloc ][   prealloc1  ][prealloc1 written]
  *
- * [45056 - 49152][49152-53248][53248-61440][61440-65536][     65536+81920   ]
- * [ compressed1 ][  regular  ][compressed1][  regular  ][ hole but no extent]
+ * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
+ * [  prealloc1  ][ compressed  ][ compressed1 ][    regular  ][ compressed1]
  *
- * [81920-86016]
- * [  regular  ]
+ * [69635-73731][   73731 - 86019   ][86019-90115]
+ * [  regular  ][ hole but no extent][  regular  ]
  */
-static void setup_file_extents(struct btrfs_root *root)
+static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
 {
         int slot = 0;
         u64 disk_bytenr = SZ_1M;
@@ -119,7 +120,7 @@ static void setup_file_extents(struct btrfs_root *root)
         insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
                       slot);
         slot++;
-        offset = 4096;
+        offset = sectorsize;
 
         /* Now another hole */
         insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
@@ -128,99 +129,106 @@ static void setup_file_extents(struct btrfs_root *root)
         offset += 4;
 
         /* Now for a regular extent */
-        insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
-                      BTRFS_FILE_EXTENT_REG, 0, slot);
+        insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
+                      disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
         slot++;
-        disk_bytenr += 4096;
-        offset += 4095;
+        disk_bytenr += sectorsize;
+        offset += sectorsize - 1;
 
         /*
          * Now for 3 extents that were split from a hole punch so we test
          * offsets properly.
          */
-        insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
-                      BTRFS_FILE_EXTENT_REG, 0, slot);
+        insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
+                      4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
         slot++;
-        offset += 4096;
-        insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
-                      0, slot);
+        offset += sectorsize;
+        insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
+                      BTRFS_FILE_EXTENT_REG, 0, slot);
         slot++;
-        offset += 4096;
-        insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
+        offset += sectorsize;
+        insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
+                      2 * sectorsize, disk_bytenr, 4 * sectorsize,
                       BTRFS_FILE_EXTENT_REG, 0, slot);
         slot++;
-        offset += 8192;
-        disk_bytenr += 16384;
+        offset += 2 * sectorsize;
+        disk_bytenr += 4 * sectorsize;
 
         /* Now for a unwritten prealloc extent */
-        insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
-                      BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
+        insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
+                sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
         slot++;
-        offset += 4096;
+        offset += sectorsize;
 
         /*
          * We want to jack up disk_bytenr a little more so the em stuff doesn't
          * merge our records.
          */
-        disk_bytenr += 8192;
+        disk_bytenr += 2 * sectorsize;
 
         /*
          * Now for a partially written prealloc extent, basically the same as
          * the hole punch example above.  Ram_bytes never changes when you mark
          * extents written btw.
          */
-        insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
-                      BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
+        insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
+                      4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
         slot++;
-        offset += 4096;
-        insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
-                      BTRFS_FILE_EXTENT_REG, 0, slot);
+        offset += sectorsize;
+        insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
+                      disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
+                      slot);
         slot++;
-        offset += 4096;
-        insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
+        offset += sectorsize;
+        insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
+                      2 * sectorsize, disk_bytenr, 4 * sectorsize,
                       BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
         slot++;
-        offset += 8192;
-        disk_bytenr += 16384;
+        offset += 2 * sectorsize;
+        disk_bytenr += 4 * sectorsize;
 
         /* Now a normal compressed extent */
-        insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
-                      BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
+        insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
+                      disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
+                      BTRFS_COMPRESS_ZLIB, slot);
         slot++;
-        offset += 8192;
+        offset += 2 * sectorsize;
         /* No merges */
-        disk_bytenr += 8192;
+        disk_bytenr += 2 * sectorsize;
 
         /* Now a split compressed extent */
-        insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
-                      BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
+        insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
+                      sectorsize, BTRFS_FILE_EXTENT_REG,
+                      BTRFS_COMPRESS_ZLIB, slot);
         slot++;
-        offset += 4096;
-        insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
+        offset += sectorsize;
+        insert_extent(root, offset, sectorsize, sectorsize, 0,
+                      disk_bytenr + sectorsize, sectorsize,
                       BTRFS_FILE_EXTENT_REG, 0, slot);
         slot++;
-        offset += 4096;
-        insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
+        offset += sectorsize;
+        insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
+                      2 * sectorsize, disk_bytenr, sectorsize,
                       BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
         slot++;
-        offset += 8192;
-        disk_bytenr += 8192;
+        offset += 2 * sectorsize;
+        disk_bytenr += 2 * sectorsize;
 
         /* Now extents that have a hole but no hole extent */
-        insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
-                      BTRFS_FILE_EXTENT_REG, 0, slot);
+        insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
+                      sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
         slot++;
-        offset += 16384;
-        disk_bytenr += 4096;
-        insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
-                      BTRFS_FILE_EXTENT_REG, 0, slot);
+        offset += 4 * sectorsize;
+        disk_bytenr += sectorsize;
+        insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
+                      sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
 }
 
 static unsigned long prealloc_only = 0;
 static unsigned long compressed_only = 0;
 static unsigned long vacancy_only = 0;
 
-static noinline int test_btrfs_get_extent(void)
+static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
 {
         struct inode *inode = NULL;
         struct btrfs_root *root = NULL;
@@ -240,7 +248,7 @@ static noinline int test_btrfs_get_extent(void)
         BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
         BTRFS_I(inode)->location.offset = 0;
 
-        root = btrfs_alloc_dummy_root();
+        root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(root)) {
                 test_msg("Couldn't allocate root\n");
                 goto out;
@@ -256,7 +264,7 @@ static noinline int test_btrfs_get_extent(void)
                 goto out;
         }
 
-        root->node = alloc_dummy_extent_buffer(NULL, 4096);
+        root->node = alloc_dummy_extent_buffer(NULL, nodesize, nodesize);
         if (!root->node) {
                 test_msg("Couldn't allocate dummy buffer\n");
                 goto out;
@@ -273,7 +281,7 @@ static noinline int test_btrfs_get_extent(void)
 
         /* First with no extents */
         BTRFS_I(inode)->root = root;
-        em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, 0, sectorsize, 0);
         if (IS_ERR(em)) {
                 em = NULL;
                 test_msg("Got an error when we shouldn't have\n");
@@ -295,7 +303,7 @@ static noinline int test_btrfs_get_extent(void)
          * setup_file_extents, so if you change anything there you need to
          * update the comment and update the expected values below.
          */
-        setup_file_extents(root);
+        setup_file_extents(root, sectorsize);
 
         em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
         if (IS_ERR(em)) {
@@ -318,7 +326,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -327,7 +335,8 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected an inline, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4091) {
+
+        if (em->start != offset || em->len != (sectorsize - 5)) {
                 test_msg("Unexpected extent wanted start %llu len 1, got start "
                          "%llu len %llu\n", offset, em->start, em->len);
                 goto out;
@@ -344,7 +353,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -366,7 +375,7 @@ static noinline int test_btrfs_get_extent(void)
         free_extent_map(em);
 
         /* Regular extent */
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -375,7 +384,7 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4095) {
+        if (em->start != offset || em->len != sectorsize - 1) {
                 test_msg("Unexpected extent wanted start %llu len 4095, got "
                          "start %llu len %llu\n", offset, em->start, em->len);
                 goto out;
@@ -393,7 +402,7 @@ static noinline int test_btrfs_get_extent(void)
         free_extent_map(em);
 
         /* The next 3 are split extents */
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -402,9 +411,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -421,7 +431,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -430,9 +440,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a hole, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -442,7 +453,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -451,9 +462,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 8192) {
-                test_msg("Unexpected extent wanted start %llu len 8192, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != 2 * sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, 2 * sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -475,7 +487,7 @@ static noinline int test_btrfs_get_extent(void)
         free_extent_map(em);
 
         /* Prealloc extent */
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -484,9 +496,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != prealloc_only) {
@@ -503,7 +516,7 @@ static noinline int test_btrfs_get_extent(void)
         free_extent_map(em);
 
         /* The next 3 are a half written prealloc extent */
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -512,9 +525,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != prealloc_only) {
@@ -532,7 +546,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -541,9 +555,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -564,7 +579,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -573,9 +588,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 8192) {
-                test_msg("Unexpected extent wanted start %llu len 8192, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != 2 * sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, 2 * sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != prealloc_only) {
@@ -598,7 +614,7 @@ static noinline int test_btrfs_get_extent(void)
         free_extent_map(em);
 
         /* Now for the compressed extent */
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -607,9 +623,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 8192) {
-                test_msg("Unexpected extent wanted start %llu len 8192, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != 2 * sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u,"
+                        "got start %llu len %llu\n",
+                        offset, 2 * sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != compressed_only) {
@@ -631,7 +648,7 @@ static noinline int test_btrfs_get_extent(void)
         free_extent_map(em);
 
         /* Split compressed extent */
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -640,9 +657,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u,"
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != compressed_only) {
@@ -665,7 +683,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -674,9 +692,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -691,7 +710,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -701,9 +720,10 @@ static noinline int test_btrfs_get_extent(void)
                          disk_bytenr, em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 8192) {
-                test_msg("Unexpected extent wanted start %llu len 8192, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != 2 * sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, 2 * sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != compressed_only) {
@@ -725,7 +745,7 @@ static noinline int test_btrfs_get_extent(void)
         free_extent_map(em);
 
         /* A hole between regular extents but no hole extent */
-        em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset + 6, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -734,9 +754,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -765,9 +786,10 @@ static noinline int test_btrfs_get_extent(void)
          * length of the actual hole, if this changes we'll have to change this
          * test.
          */
-        if (em->start != offset || em->len != 12288) {
-                test_msg("Unexpected extent wanted start %llu len 12288, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != 3 * sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u, "
+                        "got start %llu len %llu\n",
+                        offset, 3 * sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != vacancy_only) {
@@ -783,7 +805,7 @@ static noinline int test_btrfs_get_extent(void)
         offset = em->start + em->len;
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
+        em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -792,9 +814,10 @@ static noinline int test_btrfs_get_extent(void)
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != offset || em->len != 4096) {
-                test_msg("Unexpected extent wanted start %llu len 4096, got "
-                         "start %llu len %llu\n", offset, em->start, em->len);
+        if (em->start != offset || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %llu len %u,"
+                        "got start %llu len %llu\n",
+                        offset, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -815,7 +838,7 @@ out:
         return ret;
 }
 
-static int test_hole_first(void)
+static int test_hole_first(u32 sectorsize, u32 nodesize)
 {
         struct inode *inode = NULL;
         struct btrfs_root *root = NULL;
@@ -832,7 +855,7 @@ static int test_hole_first(void)
         BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
         BTRFS_I(inode)->location.offset = 0;
 
-        root = btrfs_alloc_dummy_root();
+        root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(root)) {
                 test_msg("Couldn't allocate root\n");
                 goto out;
@@ -844,7 +867,7 @@ static int test_hole_first(void)
                 goto out;
         }
 
-        root->node = alloc_dummy_extent_buffer(NULL, 4096);
+        root->node = alloc_dummy_extent_buffer(NULL, nodesize, nodesize);
         if (!root->node) {
                 test_msg("Couldn't allocate dummy buffer\n");
                 goto out;
@@ -861,9 +884,9 @@ static int test_hole_first(void)
          * btrfs_get_extent.
          */
         insert_inode_item_key(root);
-        insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
-                      BTRFS_FILE_EXTENT_REG, 0, 1);
-        em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
+        insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
+                      sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
+        em = btrfs_get_extent(inode, NULL, 0, 0, 2 * sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
@@ -872,9 +895,10 @@ static int test_hole_first(void)
                 test_msg("Expected a hole, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != 0 || em->len != 4096) {
-                test_msg("Unexpected extent wanted start 0 len 4096, got start "
-                         "%llu len %llu\n", em->start, em->len);
+        if (em->start != 0 || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start 0 len %u, "
+                        "got start %llu len %llu\n",
+                        sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != vacancy_only) {
@@ -884,18 +908,19 @@ static int test_hole_first(void)
         }
         free_extent_map(em);
 
-        em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
+        em = btrfs_get_extent(inode, NULL, 0, sectorsize, 2 * sectorsize, 0);
         if (IS_ERR(em)) {
                 test_msg("Got an error when we shouldn't have\n");
                 goto out;
         }
-        if (em->block_start != 4096) {
+        if (em->block_start != sectorsize) {
                 test_msg("Expected a real extent, got %llu\n", em->block_start);
                 goto out;
         }
-        if (em->start != 4096 || em->len != 4096) {
-                test_msg("Unexpected extent wanted start 4096 len 4096, got "
-                         "start %llu len %llu\n", em->start, em->len);
+        if (em->start != sectorsize || em->len != sectorsize) {
+                test_msg("Unexpected extent wanted start %u len %u, "
+                        "got start %llu len %llu\n",
+                        sectorsize, sectorsize, em->start, em->len);
                 goto out;
         }
         if (em->flags != 0) {
@@ -912,7 +937,7 @@ out:
         return ret;
 }
 
-static int test_extent_accounting(void)
+static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 {
         struct inode *inode = NULL;
         struct btrfs_root *root = NULL;
@@ -924,7 +949,7 @@ static int test_extent_accounting(void)
                 return ret;
         }
 
-        root = btrfs_alloc_dummy_root();
+        root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(root)) {
                 test_msg("Couldn't allocate root\n");
                 goto out;
@@ -954,10 +979,11 @@ static int test_extent_accounting(void)
                 goto out;
         }
 
-        /* [BTRFS_MAX_EXTENT_SIZE][4k] */
+        /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
         BTRFS_I(inode)->outstanding_extents++;
         ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
-                                        BTRFS_MAX_EXTENT_SIZE + 4095, NULL);
+                                        BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
+                                        NULL);
         if (ret) {
                 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
                 goto out;
@@ -969,10 +995,10 @@ static int test_extent_accounting(void)
                 goto out;
         }
 
-        /* [BTRFS_MAX_EXTENT_SIZE/2][4K HOLE][the rest] */
+        /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
         ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
                                BTRFS_MAX_EXTENT_SIZE >> 1,
-                               (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
+                               (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
                                EXTENT_DELALLOC | EXTENT_DIRTY |
                                EXTENT_UPTODATE | EXTENT_DO_ACCOUNTING, 0, 0,
                                NULL, GFP_KERNEL);
@@ -987,10 +1013,11 @@ static int test_extent_accounting(void)
                 goto out;
         }
 
-        /* [BTRFS_MAX_EXTENT_SIZE][4K] */
+        /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
         BTRFS_I(inode)->outstanding_extents++;
         ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
-                                        (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
+                                        (BTRFS_MAX_EXTENT_SIZE >> 1)
+                                        + sectorsize - 1,
                                         NULL);
         if (ret) {
                 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
@@ -1004,16 +1031,17 @@ static int test_extent_accounting(void)
         }
 
         /*
-         * [BTRFS_MAX_EXTENT_SIZE+4K][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4K]
+         * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
          *
          * I'm artificially adding 2 to outstanding_extents because in the
          * buffered IO case we'd add things up as we go, but I don't feel like
          * doing that here, this isn't the interesting case we want to test.
          */
         BTRFS_I(inode)->outstanding_extents += 2;
-        ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE + 8192,
-                                        (BTRFS_MAX_EXTENT_SIZE << 1) + 12287,
-                                        NULL);
+        ret = btrfs_set_extent_delalloc(inode,
+                        BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
+                        (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
+                        NULL);
         if (ret) {
                 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
                 goto out;
@@ -1025,10 +1053,13 @@ static int test_extent_accounting(void)
                 goto out;
         }
 
-        /* [BTRFS_MAX_EXTENT_SIZE+4k][4k][BTRFS_MAX_EXTENT_SIZE+4k] */
+        /*
+        * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
+        */
         BTRFS_I(inode)->outstanding_extents++;
-        ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
-                                        BTRFS_MAX_EXTENT_SIZE+8191, NULL);
+        ret = btrfs_set_extent_delalloc(inode,
+                        BTRFS_MAX_EXTENT_SIZE + sectorsize,
+                        BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL);
         if (ret) {
                 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
                 goto out;
@@ -1042,8 +1073,8 @@ static int test_extent_accounting(void)
 
         /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
         ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
-                               BTRFS_MAX_EXTENT_SIZE+4096,
-                               BTRFS_MAX_EXTENT_SIZE+8191,
+                               BTRFS_MAX_EXTENT_SIZE + sectorsize,
+                               BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
                                EXTENT_DIRTY | EXTENT_DELALLOC |
                                EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
                                NULL, GFP_KERNEL);
@@ -1063,8 +1094,9 @@ static int test_extent_accounting(void)
          * might fail and I'd rather satisfy my paranoia at this point.
          */
         BTRFS_I(inode)->outstanding_extents++;
-        ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
-                                        BTRFS_MAX_EXTENT_SIZE+8191, NULL);
+        ret = btrfs_set_extent_delalloc(inode,
+                        BTRFS_MAX_EXTENT_SIZE + sectorsize,
+                        BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL);
         if (ret) {
                 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
                 goto out;
@@ -1103,7 +1135,7 @@ out:
         return ret;
 }
 
-int btrfs_test_inodes(void)
+int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
 {
         int ret;
 
@@ -1112,13 +1144,13 @@ int btrfs_test_inodes(void)
         set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
 
         test_msg("Running btrfs_get_extent tests\n");
-        ret = test_btrfs_get_extent();
+        ret = test_btrfs_get_extent(sectorsize, nodesize);
         if (ret)
                 return ret;
         test_msg("Running hole first btrfs_get_extent test\n");
-        ret = test_hole_first();
+        ret = test_hole_first(sectorsize, nodesize);
         if (ret)
                 return ret;
         test_msg("Running outstanding_extents tests\n");
-        return test_extent_accounting();
+        return test_extent_accounting(sectorsize, nodesize);
 }
diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c
index 8aa4ded31326..57a12c0d680b 100644
--- a/fs/btrfs/tests/qgroup-tests.c
+++ b/fs/btrfs/tests/qgroup-tests.c
@@ -16,6 +16,7 @@
  * Boston, MA 021110-1307, USA.
  */
 
+#include <linux/types.h>
 #include "btrfs-tests.h"
 #include "../ctree.h"
 #include "../transaction.h"
@@ -216,7 +217,8 @@ static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
         return ret;
 }
 
-static int test_no_shared_qgroup(struct btrfs_root *root)
+static int test_no_shared_qgroup(struct btrfs_root *root,
+                u32 sectorsize, u32 nodesize)
 {
         struct btrfs_trans_handle trans;
         struct btrfs_fs_info *fs_info = root->fs_info;
@@ -227,7 +229,7 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
         btrfs_init_dummy_trans(&trans);
 
         test_msg("Qgroup basic add\n");
-        ret = btrfs_create_qgroup(NULL, fs_info, 5);
+        ret = btrfs_create_qgroup(NULL, fs_info, BTRFS_FS_TREE_OBJECTID);
         if (ret) {
                 test_msg("Couldn't create a qgroup %d\n", ret);
                 return ret;
@@ -238,18 +240,19 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
          * we can only call btrfs_qgroup_account_extent() directly to test
          * quota.
          */
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots);
         if (ret) {
                 ulist_free(old_roots);
                 test_msg("Couldn't find old roots: %d\n", ret);
                 return ret;
         }
 
-        ret = insert_normal_tree_ref(root, 4096, 4096, 0, 5);
+        ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
+                                BTRFS_FS_TREE_OBJECTID);
         if (ret)
                 return ret;
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots);
         if (ret) {
                 ulist_free(old_roots);
                 ulist_free(new_roots);
@@ -257,32 +260,33 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
                 return ret;
         }
 
-        ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
-                                          old_roots, new_roots);
+        ret = btrfs_qgroup_account_extent(&trans, fs_info, nodesize,
+                                          nodesize, old_roots, new_roots);
         if (ret) {
                 test_msg("Couldn't account space for a qgroup %d\n", ret);
                 return ret;
         }
 
-        if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
+        if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
+                                nodesize, nodesize)) {
                 test_msg("Qgroup counts didn't match expected values\n");
                 return -EINVAL;
         }
         old_roots = NULL;
         new_roots = NULL;
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots);
         if (ret) {
                 ulist_free(old_roots);
                 test_msg("Couldn't find old roots: %d\n", ret);
                 return ret;
         }
 
-        ret = remove_extent_item(root, 4096, 4096);
+        ret = remove_extent_item(root, nodesize, nodesize);
         if (ret)
                 return -EINVAL;
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots);
         if (ret) {
                 ulist_free(old_roots);
                 ulist_free(new_roots);
@@ -290,14 +294,14 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
                 return ret;
         }
 
-        ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
-                                          old_roots, new_roots);
+        ret = btrfs_qgroup_account_extent(&trans, fs_info, nodesize,
+                                          nodesize, old_roots, new_roots);
         if (ret) {
                 test_msg("Couldn't account space for a qgroup %d\n", ret);
                 return -EINVAL;
         }
 
-        if (btrfs_verify_qgroup_counts(fs_info, 5, 0, 0)) {
+        if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, 0, 0)) {
                 test_msg("Qgroup counts didn't match expected values\n");
                 return -EINVAL;
         }
@@ -310,7 +314,8 @@ static int test_no_shared_qgroup(struct btrfs_root *root)
  * right, also remove one of the roots and make sure the exclusive count is
  * adjusted properly.
  */
-static int test_multiple_refs(struct btrfs_root *root)
+static int test_multiple_refs(struct btrfs_root *root,
+                u32 sectorsize, u32 nodesize)
 {
         struct btrfs_trans_handle trans;
         struct btrfs_fs_info *fs_info = root->fs_info;
@@ -322,25 +327,29 @@ static int test_multiple_refs(struct btrfs_root *root)
 
         test_msg("Qgroup multiple refs test\n");
 
-        /* We have 5 created already from the previous test */
-        ret = btrfs_create_qgroup(NULL, fs_info, 256);
+        /*
+         * We have BTRFS_FS_TREE_OBJECTID created already from the
+         * previous test.
+         */
+        ret = btrfs_create_qgroup(NULL, fs_info, BTRFS_FIRST_FREE_OBJECTID);
         if (ret) {
                 test_msg("Couldn't create a qgroup %d\n", ret);
                 return ret;
         }
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots);
         if (ret) {
                 ulist_free(old_roots);
                 test_msg("Couldn't find old roots: %d\n", ret);
                 return ret;
         }
 
-        ret = insert_normal_tree_ref(root, 4096, 4096, 0, 5);
+        ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
+                                BTRFS_FS_TREE_OBJECTID);
         if (ret)
                 return ret;
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots);
         if (ret) {
                 ulist_free(old_roots);
                 ulist_free(new_roots);
@@ -348,30 +357,32 @@ static int test_multiple_refs(struct btrfs_root *root)
                 return ret;
         }
 
-        ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
-                                          old_roots, new_roots);
+        ret = btrfs_qgroup_account_extent(&trans, fs_info, nodesize,
+                                          nodesize, old_roots, new_roots);
         if (ret) {
                 test_msg("Couldn't account space for a qgroup %d\n", ret);
                 return ret;
         }
 
-        if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
+        if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
+                                       nodesize, nodesize)) {
                 test_msg("Qgroup counts didn't match expected values\n");
                 return -EINVAL;
         }
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots);
         if (ret) {
                 ulist_free(old_roots);
                 test_msg("Couldn't find old roots: %d\n", ret);
                 return ret;
         }
 
-        ret = add_tree_ref(root, 4096, 4096, 0, 256);
+        ret = add_tree_ref(root, nodesize, nodesize, 0,
+                        BTRFS_FIRST_FREE_OBJECTID);
         if (ret)
                 return ret;
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots);
         if (ret) {
                 ulist_free(old_roots);
                 ulist_free(new_roots);
@@ -379,35 +390,38 @@ static int test_multiple_refs(struct btrfs_root *root)
                 return ret;
         }
 
-        ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
-                                          old_roots, new_roots);
+        ret = btrfs_qgroup_account_extent(&trans, fs_info, nodesize,
+                                          nodesize, old_roots, new_roots);
         if (ret) {
                 test_msg("Couldn't account space for a qgroup %d\n", ret);
                 return ret;
         }
 
-        if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 0)) {
+        if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
+                                        nodesize, 0)) {
                 test_msg("Qgroup counts didn't match expected values\n");
                 return -EINVAL;
         }
 
-        if (btrfs_verify_qgroup_counts(fs_info, 256, 4096, 0)) {
+        if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
+                                        nodesize, 0)) {
                 test_msg("Qgroup counts didn't match expected values\n");
                 return -EINVAL;
         }
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &old_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots);
         if (ret) {
                 ulist_free(old_roots);
                 test_msg("Couldn't find old roots: %d\n", ret);
                 return ret;
         }
 
-        ret = remove_extent_ref(root, 4096, 4096, 0, 256);
+        ret = remove_extent_ref(root, nodesize, nodesize, 0,
+                                BTRFS_FIRST_FREE_OBJECTID);
         if (ret)
                 return ret;
 
-        ret = btrfs_find_all_roots(&trans, fs_info, 4096, 0, &new_roots);
+        ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots);
         if (ret) {
                 ulist_free(old_roots);
                 ulist_free(new_roots);
@@ -415,19 +429,21 @@ static int test_multiple_refs(struct btrfs_root *root)
                 return ret;
         }
 
-        ret = btrfs_qgroup_account_extent(&trans, fs_info, 4096, 4096,
-                                          old_roots, new_roots);
+        ret = btrfs_qgroup_account_extent(&trans, fs_info, nodesize,
+                                          nodesize, old_roots, new_roots);
         if (ret) {
                 test_msg("Couldn't account space for a qgroup %d\n", ret);
                 return ret;
         }
 
-        if (btrfs_verify_qgroup_counts(fs_info, 256, 0, 0)) {
+        if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
+                                        0, 0)) {
                 test_msg("Qgroup counts didn't match expected values\n");
                 return -EINVAL;
         }
 
-        if (btrfs_verify_qgroup_counts(fs_info, 5, 4096, 4096)) {
+        if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
+                                        nodesize, nodesize)) {
                 test_msg("Qgroup counts didn't match expected values\n");
                 return -EINVAL;
         }
@@ -435,13 +451,13 @@ static int test_multiple_refs(struct btrfs_root *root)
         return 0;
 }
 
-int btrfs_test_qgroups(void)
+int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 {
         struct btrfs_root *root;
         struct btrfs_root *tmp_root;
         int ret = 0;
 
-        root = btrfs_alloc_dummy_root();
+        root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(root)) {
                 test_msg("Couldn't allocate root\n");
                 return PTR_ERR(root);
@@ -468,7 +484,8 @@ int btrfs_test_qgroups(void)
          * Can't use bytenr 0, some things freak out
          * *cough*backref walking code*cough*
          */
-        root->node = alloc_test_extent_buffer(root->fs_info, 4096);
+        root->node = alloc_test_extent_buffer(root->fs_info, nodesize,
+                                        nodesize);
         if (!root->node) {
                 test_msg("Couldn't allocate dummy buffer\n");
                 ret = -ENOMEM;
@@ -476,16 +493,16 @@ int btrfs_test_qgroups(void)
         }
         btrfs_set_header_level(root->node, 0);
         btrfs_set_header_nritems(root->node, 0);
-        root->alloc_bytenr += 8192;
+        root->alloc_bytenr += 2 * nodesize;
 
-        tmp_root = btrfs_alloc_dummy_root();
+        tmp_root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(tmp_root)) {
                 test_msg("Couldn't allocate a fs root\n");
                 ret = PTR_ERR(tmp_root);
                 goto out;
         }
 
-        tmp_root->root_key.objectid = 5;
+        tmp_root->root_key.objectid = BTRFS_FS_TREE_OBJECTID;
         root->fs_info->fs_root = tmp_root;
         ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
         if (ret) {
@@ -493,14 +510,14 @@ int btrfs_test_qgroups(void)
                 goto out;
         }
 
-        tmp_root = btrfs_alloc_dummy_root();
+        tmp_root = btrfs_alloc_dummy_root(sectorsize, nodesize);
         if (IS_ERR(tmp_root)) {
                 test_msg("Couldn't allocate a fs root\n");
                 ret = PTR_ERR(tmp_root);
                 goto out;
         }
 
-        tmp_root->root_key.objectid = 256;
+        tmp_root->root_key.objectid = BTRFS_FIRST_FREE_OBJECTID;
         ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
         if (ret) {
                 test_msg("Couldn't insert fs root %d\n", ret);
@@ -508,10 +525,10 @@ int btrfs_test_qgroups(void)
         }
 
         test_msg("Running qgroup tests\n");
-        ret = test_no_shared_qgroup(root);
+        ret = test_no_shared_qgroup(root, sectorsize, nodesize);
         if (ret)
                 goto out;
-        ret = test_multiple_refs(root);
+        ret = test_multiple_refs(root, sectorsize, nodesize);
 out:
         btrfs_free_dummy_root(root);
         return ret;
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index f6e24cb423ae..948aa186b353 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -818,6 +818,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
 {
         struct btrfs_transaction *cur_trans = trans->transaction;
         struct btrfs_fs_info *info = root->fs_info;
+        u64 transid = trans->transid;
         unsigned long cur = trans->delayed_ref_updates;
         int lock = (trans->type != TRANS_JOIN_NOLOCK);
         int err = 0;
@@ -905,7 +906,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
 
         kmem_cache_free(btrfs_trans_handle_cachep, trans);
         if (must_run_delayed_refs) {
-                btrfs_async_run_delayed_refs(root, cur,
+                btrfs_async_run_delayed_refs(root, cur, transid,
                                              must_run_delayed_refs == 1);
         }
         return err;
@@ -1311,11 +1312,6 @@ int btrfs_defrag_root(struct btrfs_root *root)
         return ret;
 }
 
-/* Bisesctability fixup, remove in 4.8 */
-#ifndef btrfs_std_error
-#define btrfs_std_error btrfs_handle_fs_error
-#endif
-
 /*
  * Do all special snapshot related qgroup dirty hack.
  *
@@ -1385,7 +1381,7 @@ static int qgroup_account_snapshot(struct btrfs_trans_handle *trans,
         switch_commit_roots(trans->transaction, fs_info);
         ret = btrfs_write_and_wait_transaction(trans, src);
         if (ret)
-                btrfs_std_error(fs_info, ret,
+                btrfs_handle_fs_error(fs_info, ret,
                         "Error while writing out transaction for qgroup");
 
 out:
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index 9fe0ec2bf0fe..c5abee4f01ad 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -110,7 +110,6 @@ struct btrfs_trans_handle {
         u64 chunk_bytes_reserved;
         unsigned long use_count;
         unsigned long blocks_reserved;
-        unsigned long blocks_used;
         unsigned long delayed_ref_updates;
         struct btrfs_transaction *transaction;
         struct btrfs_block_rsv *block_rsv;
@@ -121,6 +120,7 @@ struct btrfs_trans_handle {
         bool can_flush_pending_bgs;
         bool reloc_reserved;
         bool sync;
+        bool dirty;
         unsigned int type;
         /*
          * this root is only needed to validate that the root passed to
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index b7665af471d8..c05f69a8ec42 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2422,8 +2422,8 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
                 root_owner = btrfs_header_owner(parent);
 
                 next = btrfs_find_create_tree_block(root, bytenr);
-                if (!next)
-                        return -ENOMEM;
+                if (IS_ERR(next))
+                        return PTR_ERR(next);
 
                 if (*level == 1) {
                         ret = wc->process_func(root, next, wc, ptr_gen);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index da9e0036a864..589f128173b1 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4241,6 +4241,7 @@ int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info)
         if (IS_ERR(uuid_root)) {
                 ret = PTR_ERR(uuid_root);
                 btrfs_abort_transaction(trans, tree_root, ret);
+                btrfs_end_transaction(trans, tree_root);
                 return ret;
         }
 
@@ -4693,12 +4694,12 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 
         if (type & BTRFS_BLOCK_GROUP_RAID5) {
                 raid_stripe_len = find_raid56_stripe_len(ndevs - 1,
-                                 btrfs_super_stripesize(info->super_copy));
+                                                extent_root->stripesize);
                 data_stripes = num_stripes - 1;
         }
         if (type & BTRFS_BLOCK_GROUP_RAID6) {
                 raid_stripe_len = find_raid56_stripe_len(ndevs - 2,
-                                 btrfs_super_stripesize(info->super_copy));
+                                                extent_root->stripesize);
                 data_stripes = num_stripes - 2;
         }
 
@@ -6258,27 +6259,23 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
         return dev;
 }
 
-static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
-                          struct extent_buffer *leaf,
-                          struct btrfs_chunk *chunk)
+/* Return -EIO if any error, otherwise return 0. */
+static int btrfs_check_chunk_valid(struct btrfs_root *root,
+                                   struct extent_buffer *leaf,
+                                   struct btrfs_chunk *chunk, u64 logical)
 {
-        struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
-        struct map_lookup *map;
-        struct extent_map *em;
-        u64 logical;
         u64 length;
         u64 stripe_len;
-        u64 devid;
-        u8 uuid[BTRFS_UUID_SIZE];
-        int num_stripes;
-        int ret;
-        int i;
+        u16 num_stripes;
+        u16 sub_stripes;
+        u64 type;
 
-        logical = key->offset;
         length = btrfs_chunk_length(leaf, chunk);
         stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
         num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
-        /* Validation check */
+        sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
+        type = btrfs_chunk_type(leaf, chunk);
+
         if (!num_stripes) {
                 btrfs_err(root->fs_info, "invalid chunk num_stripes: %u",
                           num_stripes);
@@ -6289,6 +6286,11 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
                           "invalid chunk logical %llu", logical);
                 return -EIO;
         }
+        if (btrfs_chunk_sector_size(leaf, chunk) != root->sectorsize) {
+                btrfs_err(root->fs_info, "invalid chunk sectorsize %u",
+                          btrfs_chunk_sector_size(leaf, chunk));
+                return -EIO;
+        }
         if (!length || !IS_ALIGNED(length, root->sectorsize)) {
                 btrfs_err(root->fs_info,
                         "invalid chunk length %llu", length);
@@ -6300,13 +6302,54 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
                 return -EIO;
         }
         if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
-            btrfs_chunk_type(leaf, chunk)) {
+            type) {
                 btrfs_err(root->fs_info, "unrecognized chunk type: %llu",
                           ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
                             BTRFS_BLOCK_GROUP_PROFILE_MASK) &
                           btrfs_chunk_type(leaf, chunk));
                 return -EIO;
         }
+        if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
+            (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
+            (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
+            (type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
+            (type & BTRFS_BLOCK_GROUP_DUP && num_stripes > 2) ||
+            ((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 &&
+             num_stripes != 1)) {
+                btrfs_err(root->fs_info,
+                        "invalid num_stripes:sub_stripes %u:%u for profile %llu",
+                        num_stripes, sub_stripes,
+                        type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
+                          struct extent_buffer *leaf,
+                          struct btrfs_chunk *chunk)
+{
+        struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
+        struct map_lookup *map;
+        struct extent_map *em;
+        u64 logical;
+        u64 length;
+        u64 stripe_len;
+        u64 devid;
+        u8 uuid[BTRFS_UUID_SIZE];
+        int num_stripes;
+        int ret;
+        int i;
+
+        logical = key->offset;
+        length = btrfs_chunk_length(leaf, chunk);
+        stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
+        num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+
+        ret = btrfs_check_chunk_valid(root, leaf, chunk, logical);
+        if (ret)
+                return ret;
 
         read_lock(&map_tree->map_tree.lock);
         em = lookup_extent_mapping(&map_tree->map_tree, logical, 1);
@@ -6554,6 +6597,7 @@ int btrfs_read_sys_array(struct btrfs_root *root)
         u32 array_size;
         u32 len = 0;
         u32 cur_offset;
+        u64 type;
         struct btrfs_key key;
 
         ASSERT(BTRFS_SUPER_INFO_SIZE <= root->nodesize);
@@ -6563,8 +6607,8 @@ int btrfs_read_sys_array(struct btrfs_root *root)
          * overallocate but we can keep it as-is, only the first page is used.
          */
         sb = btrfs_find_create_tree_block(root, BTRFS_SUPER_INFO_OFFSET);
-        if (!sb)
-                return -ENOMEM;
+        if (IS_ERR(sb))
+                return PTR_ERR(sb);
         set_extent_buffer_uptodate(sb);
         btrfs_set_buffer_lockdep_class(root->root_key.objectid, sb, 0);
         /*
@@ -6620,6 +6664,15 @@ int btrfs_read_sys_array(struct btrfs_root *root)
                                 break;
                         }
 
+                        type = btrfs_chunk_type(sb, chunk);
+                        if ((type & BTRFS_BLOCK_GROUP_SYSTEM) == 0) {
+                                btrfs_err(root->fs_info,
+                            "invalid chunk type %llu in sys_array at offset %u",
+                                        type, cur_offset);
+                                ret = -EIO;
+                                break;
+                        }
+
                         len = btrfs_chunk_item_size(num_stripes);
                         if (cur_offset + len > array_size)
                                 goto out_short_read;
@@ -6638,12 +6691,14 @@ int btrfs_read_sys_array(struct btrfs_root *root)
                 sb_array_offset += len;
                 cur_offset += len;
         }
+        clear_extent_buffer_uptodate(sb);
         free_extent_buffer_stale(sb);
         return ret;
 
 out_short_read:
         printk(KERN_ERR "BTRFS: sys_array too short to read %u bytes at offset %u\n",
                         len, cur_offset);
+        clear_extent_buffer_uptodate(sb);
         free_extent_buffer_stale(sb);
         return -EIO;
 }
@@ -6656,6 +6711,7 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
         struct btrfs_key found_key;
         int ret;
         int slot;
+        u64 total_dev = 0;
 
         root = root->fs_info->chunk_root;
 
@@ -6697,6 +6753,7 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
                         ret = read_one_dev(root, leaf, dev_item);
                         if (ret)
                                 goto error;
+                        total_dev++;
                 } else if (found_key.type == BTRFS_CHUNK_ITEM_KEY) {
                         struct btrfs_chunk *chunk;
                         chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
@@ -6706,6 +6763,28 @@ int btrfs_read_chunk_tree(struct btrfs_root *root)
                 }
                 path->slots[0]++;
         }
+
+        /*
+         * After loading chunk tree, we've got all device information,
+         * do another round of validation checks.
+         */
+        if (total_dev != root->fs_info->fs_devices->total_devices) {
+                btrfs_err(root->fs_info,
+           "super_num_devices %llu mismatch with num_devices %llu found here",
+                          btrfs_super_num_devices(root->fs_info->super_copy),
+                          total_dev);
+                ret = -EINVAL;
+                goto error;
+        }
+        if (btrfs_super_total_bytes(root->fs_info->super_copy) <
+            root->fs_info->fs_devices->total_rw_bytes) {
+                btrfs_err(root->fs_info,
+        "super_total_bytes %llu mismatch with fs_devices total_rw_bytes %llu",
+                          btrfs_super_total_bytes(root->fs_info->super_copy),
+                          root->fs_info->fs_devices->total_rw_bytes);
+                ret = -EINVAL;
+                goto error;
+        }
         ret = 0;
 error:
         unlock_chunks(root);
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index 5a53ac6b1e02..02b071bf3732 100644
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -101,6 +101,12 @@ convert_sfm_char(const __u16 src_char, char *target)
         case SFM_SLASH:
                 *target = '\\';
                 break;
+        case SFM_SPACE:
+                *target = ' ';
+                break;
+        case SFM_PERIOD:
+                *target = '.';
+                break;
         default:
                 return false;
         }
@@ -404,7 +410,7 @@ static __le16 convert_to_sfu_char(char src_char)
         return dest_char;
 }
 
-static __le16 convert_to_sfm_char(char src_char)
+static __le16 convert_to_sfm_char(char src_char, bool end_of_string)
 {
         __le16 dest_char;
 
@@ -427,6 +433,18 @@ static __le16 convert_to_sfm_char(char src_char)
         case '|':
                 dest_char = cpu_to_le16(SFM_PIPE);
                 break;
+        case '.':
+                if (end_of_string)
+                        dest_char = cpu_to_le16(SFM_PERIOD);
+                else
+                        dest_char = 0;
+                break;
+        case ' ':
+                if (end_of_string)
+                        dest_char = cpu_to_le16(SFM_SPACE);
+                else
+                        dest_char = 0;
+                break;
         default:
                 dest_char = 0;
         }
@@ -469,9 +487,16 @@ cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
                 /* see if we must remap this char */
                 if (map_chars == SFU_MAP_UNI_RSVD)
                         dst_char = convert_to_sfu_char(src_char);
-                else if (map_chars == SFM_MAP_UNI_RSVD)
-                        dst_char = convert_to_sfm_char(src_char);
-                else
+                else if (map_chars == SFM_MAP_UNI_RSVD) {
+                        bool end_of_string;
+
+                        if (i == srclen - 1)
+                                end_of_string = true;
+                        else
+                                end_of_string = false;
+
+                        dst_char = convert_to_sfm_char(src_char, end_of_string);
+                } else
                         dst_char = 0;
                 /*
                  * FIXME: We can not handle remapping backslash (UNI_SLASH)
diff --git a/fs/cifs/cifs_unicode.h b/fs/cifs/cifs_unicode.h
index bdc52cb9a676..479bc0a941f3 100644
--- a/fs/cifs/cifs_unicode.h
+++ b/fs/cifs/cifs_unicode.h
@@ -64,6 +64,8 @@
 #define SFM_LESSTHAN    ((__u16) 0xF023)
 #define SFM_PIPE        ((__u16) 0xF027)
 #define SFM_SLASH       ((__u16) 0xF026)
+#define SFM_PERIOD      ((__u16) 0xF028)
+#define SFM_SPACE       ((__u16) 0xF029)
 
 /*
  * Mapping mechanism to use when one of the seven reserved characters is
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 5d8b7edf8a8f..5d841f39c4b7 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -87,6 +87,7 @@ extern mempool_t *cifs_req_poolp;
 extern mempool_t *cifs_mid_poolp;
 
 struct workqueue_struct *cifsiod_wq;
+__u32 cifs_lock_secret;
 
 /*
  * Bumps refcount for cifs super block.
@@ -1266,6 +1267,8 @@ init_cifs(void)
         spin_lock_init(&cifs_file_list_lock);
         spin_lock_init(&GlobalMid_Lock);
 
+        get_random_bytes(&cifs_lock_secret, sizeof(cifs_lock_secret));
+
         if (cifs_max_pending < 2) {
                 cifs_max_pending = 2;
                 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index bba106cdc43c..8f1d8c1e72be 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -1619,6 +1619,7 @@ void cifs_oplock_break(struct work_struct *work);
 
 extern const struct slow_work_ops cifs_oplock_break_ops;
 extern struct workqueue_struct *cifsiod_wq;
+extern __u32 cifs_lock_secret;
 
 extern mempool_t *cifs_mid_poolp;
 
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 66736f57b5ab..7d2b15c06090 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -428,7 +428,9 @@ cifs_echo_request(struct work_struct *work)
          * server->ops->need_neg() == true. Also, no need to ping if
          * we got a response recently.
          */
-        if (!server->ops->need_neg || server->ops->need_neg(server) ||
+
+        if (server->tcpStatus == CifsNeedReconnect ||
+            server->tcpStatus == CifsExiting || server->tcpStatus == CifsNew ||
             (server->ops->can_echo && !server->ops->can_echo(server)) ||
             time_before(jiffies, server->lstrp + echo_interval - HZ))
                 goto requeue_echo;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 9793ae0bcaa2..d4890b6dc22d 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1112,6 +1112,12 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
         return rc;
 }
 
+static __u32
+hash_lockowner(fl_owner_t owner)
+{
+        return cifs_lock_secret ^ hash32_ptr((const void *)owner);
+}
+
 struct lock_to_push {
         struct list_head llist;
         __u64 offset;
@@ -1178,7 +1184,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile)
                 else
                         type = CIFS_WRLCK;
                 lck = list_entry(el, struct lock_to_push, llist);
-                lck->pid = flock->fl_pid;
+                lck->pid = hash_lockowner(flock->fl_owner);
                 lck->netfid = cfile->fid.netfid;
                 lck->length = length;
                 lck->type = type;
@@ -1305,7 +1311,8 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type,
                         posix_lock_type = CIFS_RDLCK;
                 else
                         posix_lock_type = CIFS_WRLCK;
-                rc = CIFSSMBPosixLock(xid, tcon, netfid, current->tgid,
+                rc = CIFSSMBPosixLock(xid, tcon, netfid,
+                                      hash_lockowner(flock->fl_owner),
                                       flock->fl_start, length, flock,
                                       posix_lock_type, wait_flag);
                 return rc;
@@ -1505,7 +1512,8 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
                         posix_lock_type = CIFS_UNLCK;
 
                 rc = CIFSSMBPosixLock(xid, tcon, cfile->fid.netfid,
-                                      current->tgid, flock->fl_start, length,
+                                      hash_lockowner(flock->fl_owner),
+                                      flock->fl_start, length,
                                       NULL, posix_lock_type, wait_flag);
                 goto out;
         }
diff --git a/fs/cifs/ntlmssp.h b/fs/cifs/ntlmssp.h
index 848249fa120f..3079b38f0afb 100644
--- a/fs/cifs/ntlmssp.h
+++ b/fs/cifs/ntlmssp.h
@@ -133,6 +133,6 @@ typedef struct _AUTHENTICATE_MESSAGE {
 
 int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, struct cifs_ses *ses);
 void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, struct cifs_ses *ses);
-int build_ntlmssp_auth_blob(unsigned char *pbuffer, u16 *buflen,
+int build_ntlmssp_auth_blob(unsigned char **pbuffer, u16 *buflen,
                         struct cifs_ses *ses,
                         const struct nls_table *nls_cp);
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index af0ec2d5ad0e..538d9b55699a 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -364,19 +364,43 @@ void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
         sec_blob->DomainName.MaximumLength = 0;
 }
 
-/* We do not malloc the blob, it is passed in pbuffer, because its
-   maximum possible size is fixed and small, making this approach cleaner.
-   This function returns the length of the data in the blob */
-int build_ntlmssp_auth_blob(unsigned char *pbuffer,
+static int size_of_ntlmssp_blob(struct cifs_ses *ses)
+{
+        int sz = sizeof(AUTHENTICATE_MESSAGE) + ses->auth_key.len
+                - CIFS_SESS_KEY_SIZE + CIFS_CPHTXT_SIZE + 2;
+
+        if (ses->domainName)
+                sz += 2 * strnlen(ses->domainName, CIFS_MAX_DOMAINNAME_LEN);
+        else
+                sz += 2;
+
+        if (ses->user_name)
+                sz += 2 * strnlen(ses->user_name, CIFS_MAX_USERNAME_LEN);
+        else
+                sz += 2;
+
+        return sz;
+}
+
+int build_ntlmssp_auth_blob(unsigned char **pbuffer,
                                         u16 *buflen,
                                    struct cifs_ses *ses,
                                    const struct nls_table *nls_cp)
 {
         int rc;
-        AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
+        AUTHENTICATE_MESSAGE *sec_blob;
         __u32 flags;
         unsigned char *tmp;
 
+        rc = setup_ntlmv2_rsp(ses, nls_cp);
+        if (rc) {
+                cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc);
+                *buflen = 0;
+                goto setup_ntlmv2_ret;
+        }
+        *pbuffer = kmalloc(size_of_ntlmssp_blob(ses), GFP_KERNEL);
+        sec_blob = (AUTHENTICATE_MESSAGE *)*pbuffer;
+
         memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
         sec_blob->MessageType = NtLmAuthenticate;
 
@@ -391,7 +415,7 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
                         flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
         }
 
-        tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
+        tmp = *pbuffer + sizeof(AUTHENTICATE_MESSAGE);
         sec_blob->NegotiateFlags = cpu_to_le32(flags);
 
         sec_blob->LmChallengeResponse.BufferOffset =
@@ -399,13 +423,9 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
         sec_blob->LmChallengeResponse.Length = 0;
         sec_blob->LmChallengeResponse.MaximumLength = 0;
 
-        sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
+        sec_blob->NtChallengeResponse.BufferOffset =
+                                cpu_to_le32(tmp - *pbuffer);
         if (ses->user_name != NULL) {
-                rc = setup_ntlmv2_rsp(ses, nls_cp);
-                if (rc) {
-                        cifs_dbg(VFS, "Error %d during NTLMSSP authentication\n", rc);
-                        goto setup_ntlmv2_ret;
-                }
                 memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
                                 ses->auth_key.len - CIFS_SESS_KEY_SIZE);
                 tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
@@ -423,23 +443,23 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
         }
 
         if (ses->domainName == NULL) {
-                sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+                sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
                 sec_blob->DomainName.Length = 0;
                 sec_blob->DomainName.MaximumLength = 0;
                 tmp += 2;
         } else {
                 int len;
                 len = cifs_strtoUTF16((__le16 *)tmp, ses->domainName,
-                                      CIFS_MAX_USERNAME_LEN, nls_cp);
+                                      CIFS_MAX_DOMAINNAME_LEN, nls_cp);
                 len *= 2; /* unicode is 2 bytes each */
-                sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+                sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
                 sec_blob->DomainName.Length = cpu_to_le16(len);
                 sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
                 tmp += len;
         }
 
         if (ses->user_name == NULL) {
-                sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+                sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
                 sec_blob->UserName.Length = 0;
                 sec_blob->UserName.MaximumLength = 0;
                 tmp += 2;
@@ -448,13 +468,13 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
                 len = cifs_strtoUTF16((__le16 *)tmp, ses->user_name,
                                       CIFS_MAX_USERNAME_LEN, nls_cp);
                 len *= 2; /* unicode is 2 bytes each */
-                sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+                sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
                 sec_blob->UserName.Length = cpu_to_le16(len);
                 sec_blob->UserName.MaximumLength = cpu_to_le16(len);
                 tmp += len;
         }
 
-        sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+        sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - *pbuffer);
         sec_blob->WorkstationName.Length = 0;
         sec_blob->WorkstationName.MaximumLength = 0;
         tmp += 2;
@@ -463,19 +483,19 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
                 (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC))
                         && !calc_seckey(ses)) {
                 memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
-                sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
+                sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
                 sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
                 sec_blob->SessionKey.MaximumLength =
                                 cpu_to_le16(CIFS_CPHTXT_SIZE);
                 tmp += CIFS_CPHTXT_SIZE;
         } else {
-                sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
+                sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - *pbuffer);
                 sec_blob->SessionKey.Length = 0;
                 sec_blob->SessionKey.MaximumLength = 0;
         }
 
+        *buflen = tmp - *pbuffer;
 setup_ntlmv2_ret:
-        *buflen = tmp - pbuffer;
         return rc;
 }
 
@@ -690,6 +710,8 @@ sess_auth_lanman(struct sess_data *sess_data)
                 rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
                                       ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
                                       true : false, lnm_session_key);
+                if (rc)
+                        goto out;
 
                 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
                 bcc_ptr += CIFS_AUTH_RESP_SIZE;
@@ -1266,7 +1288,7 @@ sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data)
         struct cifs_ses *ses = sess_data->ses;
         __u16 bytes_remaining;
         char *bcc_ptr;
-        char *ntlmsspblob = NULL;
+        unsigned char *ntlmsspblob = NULL;
         u16 blob_len;
 
         cifs_dbg(FYI, "rawntlmssp session setup authenticate phase\n");
@@ -1279,19 +1301,7 @@ sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data)
         /* Build security blob before we assemble the request */
         pSMB = (SESSION_SETUP_ANDX *)sess_data->iov[0].iov_base;
         smb_buf = (struct smb_hdr *)pSMB;
-        /*
-         * 5 is an empirical value, large enough to hold
-         * authenticate message plus max 10 of av paris,
-         * domain, user, workstation names, flags, etc.
-         */
-        ntlmsspblob = kzalloc(5*sizeof(struct _AUTHENTICATE_MESSAGE),
-                                GFP_KERNEL);
-        if (!ntlmsspblob) {
-                rc = -ENOMEM;
-                goto out;
-        }
-
-        rc = build_ntlmssp_auth_blob(ntlmsspblob,
+        rc = build_ntlmssp_auth_blob(&ntlmsspblob,
                                         &blob_len, ses, sess_data->nls_cp);
         if (rc)
                 goto out_free_ntlmsspblob;
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 8f38e33d365b..29e06db5f187 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -588,7 +588,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
         u16 blob_length = 0;
         struct key *spnego_key = NULL;
         char *security_blob = NULL;
-        char *ntlmssp_blob = NULL;
+        unsigned char *ntlmssp_blob = NULL;
         bool use_spnego = false; /* else use raw ntlmssp */
 
         cifs_dbg(FYI, "Session Setup\n");
@@ -713,13 +713,7 @@ ssetup_ntlmssp_authenticate:
                 iov[1].iov_len = blob_length;
         } else if (phase == NtLmAuthenticate) {
                 req->hdr.SessionId = ses->Suid;
-                ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
-                                       GFP_KERNEL);
-                if (ntlmssp_blob == NULL) {
-                        rc = -ENOMEM;
-                        goto ssetup_exit;
-                }
-                rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
+                rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
                                              nls_cp);
                 if (rc) {
                         cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
@@ -1818,6 +1812,33 @@ SMB2_echo(struct TCP_Server_Info *server)
 
         cifs_dbg(FYI, "In echo request\n");
 
+        if (server->tcpStatus == CifsNeedNegotiate) {
+                struct list_head *tmp, *tmp2;
+                struct cifs_ses *ses;
+                struct cifs_tcon *tcon;
+
+                cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
+                spin_lock(&cifs_tcp_ses_lock);
+                list_for_each(tmp, &server->smb_ses_list) {
+                        ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
+                        list_for_each(tmp2, &ses->tcon_list) {
+                                tcon = list_entry(tmp2, struct cifs_tcon,
+                                                  tcon_list);
+                                /* add check for persistent handle reconnect */
+                                if (tcon && tcon->need_reconnect) {
+                                        spin_unlock(&cifs_tcp_ses_lock);
+                                        rc = smb2_reconnect(SMB2_ECHO, tcon);
+                                        spin_lock(&cifs_tcp_ses_lock);
+                                }
+                        }
+                }
+                spin_unlock(&cifs_tcp_ses_lock);
+        }
+
+        /* if no session, renegotiate failed above */
+        if (server->tcpStatus == CifsNeedNegotiate)
+                return -EIO;
+
         rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
         if (rc)
                 return rc;
diff --git a/fs/dcache.c b/fs/dcache.c
index 817c243c1ff1..d6847d7b123d 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -507,6 +507,44 @@ void d_drop(struct dentry *dentry)
 }
 EXPORT_SYMBOL(d_drop);
 
+static inline void dentry_unlist(struct dentry *dentry, struct dentry *parent)
+{
+        struct dentry *next;
+        /*
+         * Inform d_walk() and shrink_dentry_list() that we are no longer
+         * attached to the dentry tree
+         */
+        dentry->d_flags |= DCACHE_DENTRY_KILLED;
+        if (unlikely(list_empty(&dentry->d_child)))
+                return;
+        __list_del_entry(&dentry->d_child);
+        /*
+         * Cursors can move around the list of children.  While we'd been
+         * a normal list member, it didn't matter - ->d_child.next would've
+         * been updated.  However, from now on it won't be and for the
+         * things like d_walk() it might end up with a nasty surprise.
+         * Normally d_walk() doesn't care about cursors moving around -
+         * ->d_lock on parent prevents that and since a cursor has no children
+         * of its own, we get through it without ever unlocking the parent.
+         * There is one exception, though - if we ascend from a child that
+         * gets killed as soon as we unlock it, the next sibling is found
+         * using the value left in its ->d_child.next.  And if _that_
+         * pointed to a cursor, and cursor got moved (e.g. by lseek())
+         * before d_walk() regains parent->d_lock, we'll end up skipping
+         * everything the cursor had been moved past.
+         *
+         * Solution: make sure that the pointer left behind in ->d_child.next
+         * points to something that won't be moving around.  I.e. skip the
+         * cursors.
+         */
+        while (dentry->d_child.next != &parent->d_subdirs) {
+                next = list_entry(dentry->d_child.next, struct dentry, d_child);
+                if (likely(!(next->d_flags & DCACHE_DENTRY_CURSOR)))
+                        break;
+                dentry->d_child.next = next->d_child.next;
+        }
+}
+
 static void __dentry_kill(struct dentry *dentry)
 {
         struct dentry *parent = NULL;
@@ -532,12 +570,7 @@ static void __dentry_kill(struct dentry *dentry)
         }
         /* if it was on the hash then remove it */
         __d_drop(dentry);
-        __list_del_entry(&dentry->d_child);
-        /*
-         * Inform d_walk() that we are no longer attached to the
-         * dentry tree
-         */
-        dentry->d_flags |= DCACHE_DENTRY_KILLED;
+        dentry_unlist(dentry, parent);
         if (parent)
                 spin_unlock(&parent->d_lock);
         dentry_iput(dentry);
@@ -1203,6 +1236,9 @@ resume:
                 struct dentry *dentry = list_entry(tmp, struct dentry, d_child);
                 next = tmp->next;
 
+                if (unlikely(dentry->d_flags & DCACHE_DENTRY_CURSOR))
+                        continue;
+
                 spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
 
                 ret = enter(data, dentry);
@@ -1651,6 +1687,16 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
 }
 EXPORT_SYMBOL(d_alloc);
 
+struct dentry *d_alloc_cursor(struct dentry * parent)
+{
+        struct dentry *dentry = __d_alloc(parent->d_sb, NULL);
+        if (dentry) {
+                dentry->d_flags |= DCACHE_RCUACCESS | DCACHE_DENTRY_CURSOR;
+                dentry->d_parent = dget(parent);
+        }
+        return dentry;
+}
+
 /**
  * d_alloc_pseudo - allocate a dentry (for lookup-less filesystems)
  * @sb: the superblock
@@ -2457,7 +2503,6 @@ retry:
                 rcu_read_unlock();
                 goto retry;
         }
-        rcu_read_unlock();
         /*
          * No changes for the parent since the beginning of d_lookup().
          * Since all removals from the chain happen with hlist_bl_lock(),
@@ -2470,8 +2515,6 @@ retry:
                         continue;
                 if (dentry->d_parent != parent)
                         continue;
-                if (d_unhashed(dentry))
-                        continue;
                 if (parent->d_flags & DCACHE_OP_COMPARE) {
                         int tlen = dentry->d_name.len;
                         const char *tname = dentry->d_name.name;
@@ -2483,9 +2526,18 @@ retry:
                         if (dentry_cmp(dentry, str, len))
                                 continue;
                 }
-                dget(dentry);
                 hlist_bl_unlock(b);
-                /* somebody is doing lookup for it right now; wait for it */
+                /* now we can try to grab a reference */
+                if (!lockref_get_not_dead(&dentry->d_lockref)) {
+                        rcu_read_unlock();
+                        goto retry;
+                }
+
+                rcu_read_unlock();
+                /*
+                 * somebody is likely to be still doing lookup for it;
+                 * wait for them to finish
+                 */
                 spin_lock(&dentry->d_lock);
                 d_wait_lookup(dentry);
                 /*
@@ -2516,6 +2568,7 @@ retry:
                 dput(new);
                 return dentry;
         }
+        rcu_read_unlock();
         /* we can't take ->d_lock here; it's OK, though. */
         new->d_flags |= DCACHE_PAR_LOOKUP;
         new->d_wait = wq;
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 9c1c9a01b7e5..592059f88e04 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -127,7 +127,6 @@ static int open_proxy_open(struct inode *inode, struct file *filp)
                 r = real_fops->open(inode, filp);
 
 out:
-        fops_put(real_fops);
         debugfs_use_file_finish(srcu_idx);
         return r;
 }
@@ -262,8 +261,10 @@ static int full_proxy_open(struct inode *inode, struct file *filp)
 
         if (real_fops->open) {
                 r = real_fops->open(inode, filp);
-
-                if (filp->f_op != proxy_fops) {
+                if (r) {
+                        replace_fops(filp, d_inode(dentry)->i_fop);
+                        goto free_proxy;
+                } else if (filp->f_op != proxy_fops) {
                         /* No protection against file removal anymore. */
                         WARN(1, "debugfs file owner replaced proxy fops: %pd",
                                 dentry);
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index 866bb18efefe..e818f5ac7a26 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -25,6 +25,7 @@
 #include <linux/slab.h>
 #include <linux/wait.h>
 #include <linux/mount.h>
+#include <linux/file.h>
 #include "ecryptfs_kernel.h"
 
 struct ecryptfs_open_req {
@@ -147,7 +148,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
         flags |= IS_RDONLY(d_inode(lower_dentry)) ? O_RDONLY : O_RDWR;
         (*lower_file) = dentry_open(&req.path, flags, cred);
         if (!IS_ERR(*lower_file))
-                goto out;
+                goto have_file;
         if ((flags & O_ACCMODE) == O_RDONLY) {
                 rc = PTR_ERR((*lower_file));
                 goto out;
@@ -165,8 +166,16 @@ int ecryptfs_privileged_open(struct file **lower_file,
         mutex_unlock(&ecryptfs_kthread_ctl.mux);
         wake_up(&ecryptfs_kthread_ctl.wait);
         wait_for_completion(&req.done);
-        if (IS_ERR(*lower_file))
+        if (IS_ERR(*lower_file)) {
                 rc = PTR_ERR(*lower_file);
+                goto out;
+        }
+have_file:
+        if ((*lower_file)->f_op->mmap == NULL) {
+                fput(*lower_file);
+                *lower_file = NULL;
+                rc = -EMEDIUMTYPE;
+        }
 out:
         return rc;
 }
diff --git a/fs/internal.h b/fs/internal.h
index b71deeecea17..f57ced528cde 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -130,6 +130,7 @@ extern int invalidate_inodes(struct super_block *, bool);
 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 extern int d_set_mounted(struct dentry *dentry);
 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
+extern struct dentry *d_alloc_cursor(struct dentry *);
 
 /*
  * read_write.c
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index b31852f76f46..e3ca4b4cac84 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2329,18 +2329,10 @@ void *jbd2_alloc(size_t size, gfp_t flags)
 
         BUG_ON(size & (size-1)); /* Must be a power of 2 */
 
-        flags |= __GFP_REPEAT;
-        if (size == PAGE_SIZE)
-                ptr = (void *)__get_free_pages(flags, 0);
-        else if (size > PAGE_SIZE) {
-                int order = get_order(size);
-
-                if (order < 3)
-                        ptr = (void *)__get_free_pages(flags, order);
-                else
-                        ptr = vmalloc(size);
-        } else
+        if (size < PAGE_SIZE)
                 ptr = kmem_cache_alloc(get_slab(size), flags);
+        else
+                ptr = (void *)__get_free_pages(flags, get_order(size));
 
         /* Check alignment; SLUB has gotten this wrong in the past,
          * and this can lead to user data corruption! */
@@ -2351,20 +2343,10 @@ void *jbd2_alloc(size_t size, gfp_t flags)
 
 void jbd2_free(void *ptr, size_t size)
 {
-        if (size == PAGE_SIZE) {
-                free_pages((unsigned long)ptr, 0);
-                return;
-        }
-        if (size > PAGE_SIZE) {
-                int order = get_order(size);
-
-                if (order < 3)
-                        free_pages((unsigned long)ptr, order);
-                else
-                        vfree(ptr);
-                return;
-        }
-        kmem_cache_free(get_slab(size), ptr);
+        if (size < PAGE_SIZE)
+                kmem_cache_free(get_slab(size), ptr);
+        else
+                free_pages((unsigned long)ptr, get_order(size));
 };
 
 /*
diff --git a/fs/libfs.c b/fs/libfs.c
index 3db2721144c2..cedeacbae303 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -71,9 +71,7 @@ EXPORT_SYMBOL(simple_lookup);
 
 int dcache_dir_open(struct inode *inode, struct file *file)
 {
-        static struct qstr cursor_name = QSTR_INIT(".", 1);
-
-        file->private_data = d_alloc(file->f_path.dentry, &cursor_name);
+        file->private_data = d_alloc_cursor(file->f_path.dentry);
 
         return file->private_data ? 0 : -ENOMEM;
 }
diff --git a/fs/namespace.c b/fs/namespace.c
index a7ec92c051f5..783004af5707 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -3247,6 +3247,10 @@ static bool fs_fully_visible(struct file_system_type *type, int *new_mnt_flags)
                 if (mnt->mnt.mnt_sb->s_iflags & SB_I_NOEXEC)
                         mnt_flags &= ~(MNT_LOCK_NOSUID | MNT_LOCK_NOEXEC);
 
+                /* Don't miss readonly hidden in the superblock flags */
+                if (mnt->mnt.mnt_sb->s_flags & MS_RDONLY)
+                        mnt_flags |= MNT_LOCK_READONLY;
+
                 /* Verify the mount flags are equal to or more permissive
                  * than the proposed new mount.
                  */
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index aaf7bd0cbae2..d8015a03db4c 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -424,12 +424,17 @@ static int xdr_decode(nfs_readdir_descriptor_t *desc,
 static
 int nfs_same_file(struct dentry *dentry, struct nfs_entry *entry)
 {
+        struct inode *inode;
         struct nfs_inode *nfsi;
 
         if (d_really_is_negative(dentry))
                 return 0;
 
-        nfsi = NFS_I(d_inode(dentry));
+        inode = d_inode(dentry);
+        if (is_bad_inode(inode) || NFS_STALE(inode))
+                return 0;
+
+        nfsi = NFS_I(inode);
         if (entry->fattr->fileid == nfsi->fileid)
                 return 1;
         if (nfs_compare_fh(entry->fh, &nfsi->fh) == 0)
@@ -1363,7 +1368,6 @@ EXPORT_SYMBOL_GPL(nfs_dentry_operations);
 struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
 {
         struct dentry *res;
-        struct dentry *parent;
         struct inode *inode = NULL;
         struct nfs_fh *fhandle = NULL;
         struct nfs_fattr *fattr = NULL;
@@ -1393,7 +1397,6 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in
         if (IS_ERR(label))
                 goto out;
 
-        parent = dentry->d_parent;
         /* Protect against concurrent sillydeletes */
         trace_nfs_lookup_enter(dir, dentry, flags);
         error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
@@ -1536,9 +1539,9 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
                 err = PTR_ERR(inode);
                 trace_nfs_atomic_open_exit(dir, ctx, open_flags, err);
                 put_nfs_open_context(ctx);
+                d_drop(dentry);
                 switch (err) {
                 case -ENOENT:
-                        d_drop(dentry);
                         d_add(dentry, NULL);
                         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
                         break;
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 979b3c4dee6a..c7326c2af2c3 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -353,10 +353,12 @@ static ssize_t nfs_direct_wait(struct nfs_direct_req *dreq)
 
         result = wait_for_completion_killable(&dreq->completion);
 
+        if (!result) {
+                result = dreq->count;
+                WARN_ON_ONCE(dreq->count < 0);
+        }
         if (!result)
                 result = dreq->error;
-        if (!result)
-                result = dreq->count;
 
 out:
         return (ssize_t) result;
@@ -386,8 +388,10 @@ static void nfs_direct_complete(struct nfs_direct_req *dreq, bool write)
 
         if (dreq->iocb) {
                 long res = (long) dreq->error;
-                if (!res)
+                if (dreq->count != 0) {
                         res = (long) dreq->count;
+                        WARN_ON_ONCE(dreq->count < 0);
+                }
                 dreq->iocb->ki_complete(dreq->iocb, res, 0);
         }
 
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 52e7d6869e3b..dda689d7a8a7 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -282,6 +282,7 @@ nfs_init_locked(struct inode *inode, void *opaque)
         struct nfs_fattr        *fattr = desc->fattr;
 
         set_nfs_fileid(inode, fattr->fileid);
+        inode->i_mode = fattr->mode;
         nfs_copy_fh(NFS_FH(inode), desc->fh);
         return 0;
 }
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index de97567795a5..ff416d0e24bc 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2882,12 +2882,11 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
                         call_close |= is_wronly;
                 else if (is_wronly)
                         calldata->arg.fmode |= FMODE_WRITE;
+                if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
+                        call_close |= is_rdwr;
         } else if (is_rdwr)
                 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
 
-        if (calldata->arg.fmode == 0)
-                call_close |= is_rdwr;
-
         if (!nfs4_valid_open_stateid(state))
                 call_close = 0;
         spin_unlock(&state->owner->so_lock);
@@ -7924,8 +7923,8 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
                         break;
                 }
                 lo = NFS_I(inode)->layout;
-                if (lo && nfs4_stateid_match(&lgp->args.stateid,
-                                        &lo->plh_stateid)) {
+                if (lo && !test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) &&
+                    nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
                         LIST_HEAD(head);
 
                         /*
@@ -7936,10 +7935,10 @@ nfs4_layoutget_handle_exception(struct rpc_task *task,
                         pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0);
                         spin_unlock(&inode->i_lock);
                         pnfs_free_lseg_list(&head);
+                        status = -EAGAIN;
+                        goto out;
                 } else
                         spin_unlock(&inode->i_lock);
-                status = -EAGAIN;
-                goto out;
         }
 
         status = nfs4_handle_exception(server, status, exception);
@@ -8036,7 +8035,10 @@ nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
                 .flags = RPC_TASK_ASYNC,
         };
         struct pnfs_layout_segment *lseg = NULL;
-        struct nfs4_exception exception = { .timeout = *timeout };
+        struct nfs4_exception exception = {
+                .inode = inode,
+                .timeout = *timeout,
+        };
         int status = 0;
 
         dprintk("--> %s\n", __func__);
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 9679f4749364..834b875900d6 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1488,9 +1488,9 @@ restart:
                                         }
                                         spin_unlock(&state->state_lock);
                                 }
-                                nfs4_put_open_state(state);
                                 clear_bit(NFS_STATE_RECLAIM_NOGRACE,
                                         &state->flags);
+                                nfs4_put_open_state(state);
                                 spin_lock(&sp->so_lock);
                                 goto restart;
                         }
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 0c7e0d45a4de..0fbe734cc38c 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -361,8 +361,10 @@ pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo,
         list_del_init(&lseg->pls_list);
         /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */
         atomic_dec(&lo->plh_refcount);
-        if (list_empty(&lo->plh_segs))
+        if (list_empty(&lo->plh_segs)) {
+                set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
                 clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
+        }
         rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq);
 }
 
@@ -1290,6 +1292,7 @@ alloc_init_layout_hdr(struct inode *ino,
         INIT_LIST_HEAD(&lo->plh_bulk_destroy);
         lo->plh_inode = ino;
         lo->plh_lc_cred = get_rpccred(ctx->cred);
+        lo->plh_flags |= 1 << NFS_LAYOUT_INVALID_STID;
         return lo;
 }
 
@@ -1297,6 +1300,8 @@ static struct pnfs_layout_hdr *
 pnfs_find_alloc_layout(struct inode *ino,
                        struct nfs_open_context *ctx,
                        gfp_t gfp_flags)
+        __releases(&ino->i_lock)
+        __acquires(&ino->i_lock)
 {
         struct nfs_inode *nfsi = NFS_I(ino);
         struct pnfs_layout_hdr *new = NULL;
@@ -1565,8 +1570,7 @@ lookup_again:
          * stateid, or it has been invalidated, then we must use the open
          * stateid.
          */
-        if (lo->plh_stateid.seqid == 0 ||
-            test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) {
+        if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) {
 
                 /*
                  * The first layoutget for the file. Need to serialize per
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index 0dfc476da3e1..b38e3c0dc790 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -247,7 +247,11 @@ void pnfs_fetch_commit_bucket_list(struct list_head *pages,
 }
 
 /* Helper function for pnfs_generic_commit_pagelist to catch an empty
- * page list. This can happen when two commits race. */
+ * page list. This can happen when two commits race.
+ *
+ * This must be called instead of nfs_init_commit - call one or the other, but
+ * not both!
+ */
 static bool
 pnfs_generic_commit_cancel_empty_pagelist(struct list_head *pages,
                                           struct nfs_commit_data *data,
@@ -256,7 +260,11 @@ pnfs_generic_commit_cancel_empty_pagelist(struct list_head *pages,
         if (list_empty(pages)) {
                 if (atomic_dec_and_test(&cinfo->mds->rpcs_out))
                         wake_up_atomic_t(&cinfo->mds->rpcs_out);
-                nfs_commitdata_release(data);
+                /* don't call nfs_commitdata_release - it tries to put
+                 * the open_context which is not acquired until nfs_init_commit
+                 * which has not been called on @data */
+                WARN_ON_ONCE(data->context);
+                nfs_commit_free(data);
                 return true;
         }
 
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 6776d7a7839e..572e5b3b06f1 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -367,13 +367,13 @@ readpage_async_filler(void *data, struct page *page)
                 nfs_list_remove_request(new);
                 nfs_readpage_release(new);
                 error = desc->pgio->pg_error;
-                goto out_unlock;
+                goto out;
         }
         return 0;
 out_error:
         error = PTR_ERR(new);
-out_unlock:
         unlock_page(page);
+out:
         return error;
 }
 
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index e55b5242614d..31f3df193bdb 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -290,7 +290,7 @@ out_free_buf:
         return error;
 }
 
-#define NFSD_MDS_PR_KEY         0x0100000000000000
+#define NFSD_MDS_PR_KEY         0x0100000000000000ULL
 
 /*
  * We use the client ID as a unique key for the reservations.
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index 1580ea6fd64d..d08cd88155c7 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -104,22 +104,21 @@ static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp,
                 goto out;
 
         inode = d_inode(fh->fh_dentry);
-        if (!IS_POSIXACL(inode) || !inode->i_op->set_acl) {
-                error = -EOPNOTSUPP;
-                goto out_errno;
-        }
 
         error = fh_want_write(fh);
         if (error)
                 goto out_errno;
 
-        error = inode->i_op->set_acl(inode, argp->acl_access, ACL_TYPE_ACCESS);
+        fh_lock(fh);
+
+        error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
         if (error)
-                goto out_drop_write;
-        error = inode->i_op->set_acl(inode, argp->acl_default,
-                                     ACL_TYPE_DEFAULT);
+                goto out_drop_lock;
+        error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
         if (error)
-                goto out_drop_write;
+                goto out_drop_lock;
+
+        fh_unlock(fh);
 
         fh_drop_write(fh);
 
@@ -131,7 +130,8 @@ out:
         posix_acl_release(argp->acl_access);
         posix_acl_release(argp->acl_default);
         return nfserr;
-out_drop_write:
+out_drop_lock:
+        fh_unlock(fh);
         fh_drop_write(fh);
 out_errno:
         nfserr = nfserrno(error);
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 01df4cd7c753..0c890347cde3 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -95,22 +95,20 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
                 goto out;
 
         inode = d_inode(fh->fh_dentry);
-        if (!IS_POSIXACL(inode) || !inode->i_op->set_acl) {
-                error = -EOPNOTSUPP;
-                goto out_errno;
-        }
 
         error = fh_want_write(fh);
         if (error)
                 goto out_errno;
 
-        error = inode->i_op->set_acl(inode, argp->acl_access, ACL_TYPE_ACCESS);
+        fh_lock(fh);
+
+        error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
         if (error)
-                goto out_drop_write;
-        error = inode->i_op->set_acl(inode, argp->acl_default,
-                                     ACL_TYPE_DEFAULT);
+                goto out_drop_lock;
+        error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
 
-out_drop_write:
+out_drop_lock:
+        fh_unlock(fh);
         fh_drop_write(fh);
 out_errno:
         nfserr = nfserrno(error);
diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index 6adabd6049b7..71292a0d6f09 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -770,9 +770,6 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
         dentry = fhp->fh_dentry;
         inode = d_inode(dentry);
 
-        if (!inode->i_op->set_acl || !IS_POSIXACL(inode))
-                return nfserr_attrnotsupp;
-
         if (S_ISDIR(inode->i_mode))
                 flags = NFS4_ACL_DIR;
 
@@ -782,16 +779,19 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
         if (host_error < 0)
                 goto out_nfserr;
 
-        host_error = inode->i_op->set_acl(inode, pacl, ACL_TYPE_ACCESS);
+        fh_lock(fhp);
+
+        host_error = set_posix_acl(inode, ACL_TYPE_ACCESS, pacl);
         if (host_error < 0)
-                goto out_release;
+                goto out_drop_lock;
 
         if (S_ISDIR(inode->i_mode)) {
-                host_error = inode->i_op->set_acl(inode, dpacl,
-                                                  ACL_TYPE_DEFAULT);
+                host_error = set_posix_acl(inode, ACL_TYPE_DEFAULT, dpacl);
         }
 
-out_release:
+out_drop_lock:
+        fh_unlock(fhp);
+
         posix_acl_release(pacl);
         posix_acl_release(dpacl);
 out_nfserr:
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 7389cb1d7409..04c68d900324 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -710,22 +710,6 @@ static struct rpc_cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc
         }
 }
 
-static struct rpc_clnt *create_backchannel_client(struct rpc_create_args *args)
-{
-        struct rpc_xprt *xprt;
-
-        if (args->protocol != XPRT_TRANSPORT_BC_TCP)
-                return rpc_create(args);
-
-        xprt = args->bc_xprt->xpt_bc_xprt;
-        if (xprt) {
-                xprt_get(xprt);
-                return rpc_create_xprt(args, xprt);
-        }
-
-        return rpc_create(args);
-}
-
 static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_session *ses)
 {
         int maxtime = max_cb_time(clp->net);
@@ -768,7 +752,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
                 args.authflavor = ses->se_cb_sec.flavor;
         }
         /* Create RPC client */
-        client = create_backchannel_client(&args);
+        client = rpc_create(&args);
         if (IS_ERR(client)) {
                 dprintk("NFSD: couldn't create callback client: %ld\n",
                         PTR_ERR(client));
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index f5f82e145018..70d0b9b33031 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3480,12 +3480,17 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
 }
 
 static struct nfs4_ol_stateid *
-init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
-                struct nfsd4_open *open)
+init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open)
 {
 
         struct nfs4_openowner *oo = open->op_openowner;
         struct nfs4_ol_stateid *retstp = NULL;
+        struct nfs4_ol_stateid *stp;
+
+        stp = open->op_stp;
+        /* We are moving these outside of the spinlocks to avoid the warnings */
+        mutex_init(&stp->st_mutex);
+        mutex_lock(&stp->st_mutex);
 
         spin_lock(&oo->oo_owner.so_client->cl_lock);
         spin_lock(&fp->fi_lock);
@@ -3493,6 +3498,8 @@ init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
         retstp = nfsd4_find_existing_open(fp, open);
         if (retstp)
                 goto out_unlock;
+
+        open->op_stp = NULL;
         atomic_inc(&stp->st_stid.sc_count);
         stp->st_stid.sc_type = NFS4_OPEN_STID;
         INIT_LIST_HEAD(&stp->st_locks);
@@ -3502,14 +3509,19 @@ init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
         stp->st_access_bmap = 0;
         stp->st_deny_bmap = 0;
         stp->st_openstp = NULL;
-        init_rwsem(&stp->st_rwsem);
         list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
         list_add(&stp->st_perfile, &fp->fi_stateids);
 
 out_unlock:
         spin_unlock(&fp->fi_lock);
         spin_unlock(&oo->oo_owner.so_client->cl_lock);
-        return retstp;
+        if (retstp) {
+                mutex_lock(&retstp->st_mutex);
+                /* To keep mutex tracking happy */
+                mutex_unlock(&stp->st_mutex);
+                stp = retstp;
+        }
+        return stp;
 }
 
 /*
@@ -4305,7 +4317,6 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
         struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
         struct nfs4_file *fp = NULL;
         struct nfs4_ol_stateid *stp = NULL;
-        struct nfs4_ol_stateid *swapstp = NULL;
         struct nfs4_delegation *dp = NULL;
         __be32 status;
 
@@ -4335,32 +4346,28 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
          */
         if (stp) {
                 /* Stateid was found, this is an OPEN upgrade */
-                down_read(&stp->st_rwsem);
+                mutex_lock(&stp->st_mutex);
                 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
                 if (status) {
-                        up_read(&stp->st_rwsem);
+                        mutex_unlock(&stp->st_mutex);
                         goto out;
                 }
         } else {
-                stp = open->op_stp;
-                open->op_stp = NULL;
-                swapstp = init_open_stateid(stp, fp, open);
-                if (swapstp) {
-                        nfs4_put_stid(&stp->st_stid);
-                        stp = swapstp;
-                        down_read(&stp->st_rwsem);
+                /* stp is returned locked. */
+                stp = init_open_stateid(fp, open);
+                /* See if we lost the race to some other thread */
+                if (stp->st_access_bmap != 0) {
                         status = nfs4_upgrade_open(rqstp, fp, current_fh,
                                                 stp, open);
                         if (status) {
-                                up_read(&stp->st_rwsem);
+                                mutex_unlock(&stp->st_mutex);
                                 goto out;
                         }
                         goto upgrade_out;
                 }
-                down_read(&stp->st_rwsem);
                 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
                 if (status) {
-                        up_read(&stp->st_rwsem);
+                        mutex_unlock(&stp->st_mutex);
                         release_open_stateid(stp);
                         goto out;
                 }
@@ -4372,7 +4379,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
         }
 upgrade_out:
         nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);
-        up_read(&stp->st_rwsem);
+        mutex_unlock(&stp->st_mutex);
 
         if (nfsd4_has_session(&resp->cstate)) {
                 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
@@ -4977,12 +4984,12 @@ static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_
                  * revoked delegations are kept only for free_stateid.
                  */
                 return nfserr_bad_stateid;
-        down_write(&stp->st_rwsem);
+        mutex_lock(&stp->st_mutex);
         status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
         if (status == nfs_ok)
                 status = nfs4_check_fh(current_fh, &stp->st_stid);
         if (status != nfs_ok)
-                up_write(&stp->st_rwsem);
+                mutex_unlock(&stp->st_mutex);
         return status;
 }
 
@@ -5030,7 +5037,7 @@ static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cs
                 return status;
         oo = openowner(stp->st_stateowner);
         if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
-                up_write(&stp->st_rwsem);
+                mutex_unlock(&stp->st_mutex);
                 nfs4_put_stid(&stp->st_stid);
                 return nfserr_bad_stateid;
         }
@@ -5062,12 +5069,12 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
         oo = openowner(stp->st_stateowner);
         status = nfserr_bad_stateid;
         if (oo->oo_flags & NFS4_OO_CONFIRMED) {
-                up_write(&stp->st_rwsem);
+                mutex_unlock(&stp->st_mutex);
                 goto put_stateid;
         }
         oo->oo_flags |= NFS4_OO_CONFIRMED;
         nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);
-        up_write(&stp->st_rwsem);
+        mutex_unlock(&stp->st_mutex);
         dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
                 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
 
@@ -5143,7 +5150,7 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp,
         nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);
         status = nfs_ok;
 put_stateid:
-        up_write(&stp->st_rwsem);
+        mutex_unlock(&stp->st_mutex);
         nfs4_put_stid(&stp->st_stid);
 out:
         nfsd4_bump_seqid(cstate, status);
@@ -5196,7 +5203,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
         if (status)
                 goto out; 
         nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);
-        up_write(&stp->st_rwsem);
+        mutex_unlock(&stp->st_mutex);
 
         nfsd4_close_open_stateid(stp);
 
@@ -5422,7 +5429,7 @@ init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
         stp->st_access_bmap = 0;
         stp->st_deny_bmap = open_stp->st_deny_bmap;
         stp->st_openstp = open_stp;
-        init_rwsem(&stp->st_rwsem);
+        mutex_init(&stp->st_mutex);
         list_add(&stp->st_locks, &open_stp->st_locks);
         list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
         spin_lock(&fp->fi_lock);
@@ -5591,7 +5598,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
                                         &open_stp, nn);
                 if (status)
                         goto out;
-                up_write(&open_stp->st_rwsem);
+                mutex_unlock(&open_stp->st_mutex);
                 open_sop = openowner(open_stp->st_stateowner);
                 status = nfserr_bad_stateid;
                 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
@@ -5600,7 +5607,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
                 status = lookup_or_create_lock_state(cstate, open_stp, lock,
                                                         &lock_stp, &new);
                 if (status == nfs_ok)
-                        down_write(&lock_stp->st_rwsem);
+                        mutex_lock(&lock_stp->st_mutex);
         } else {
                 status = nfs4_preprocess_seqid_op(cstate,
                                        lock->lk_old_lock_seqid,
@@ -5704,7 +5711,7 @@ out:
                     seqid_mutating_err(ntohl(status)))
                         lock_sop->lo_owner.so_seqid++;
 
-                up_write(&lock_stp->st_rwsem);
+                mutex_unlock(&lock_stp->st_mutex);
 
                 /*
                  * If this is a new, never-before-used stateid, and we are
@@ -5874,7 +5881,7 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 fput:
         fput(filp);
 put_stateid:
-        up_write(&stp->st_rwsem);
+        mutex_unlock(&stp->st_mutex);
         nfs4_put_stid(&stp->st_stid);
 out:
         nfsd4_bump_seqid(cstate, status);
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 986e51e5ceac..64053eadeb81 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -535,7 +535,7 @@ struct nfs4_ol_stateid {
         unsigned char                   st_access_bmap;
         unsigned char                   st_deny_bmap;
         struct nfs4_ol_stateid          *st_openstp;
-        struct rw_semaphore             st_rwsem;
+        struct mutex                    st_mutex;
 };
 
 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 809bd2de7ad0..e9fd241b9a0a 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -439,7 +439,7 @@ static int nilfs_valid_sb(struct nilfs_super_block *sbp)
         if (!sbp || le16_to_cpu(sbp->s_magic) != NILFS_SUPER_MAGIC)
                 return 0;
         bytes = le16_to_cpu(sbp->s_bytes);
-        if (bytes > BLOCK_SIZE)
+        if (bytes < sumoff + 4 || bytes > BLOCK_SIZE)
                 return 0;
         crc = crc32_le(le32_to_cpu(sbp->s_crc_seed), (unsigned char *)sbp,
                        sumoff);
diff --git a/fs/ocfs2/Makefile b/fs/ocfs2/Makefile
index e27e6527912b..4342c7ee7d20 100644
--- a/fs/ocfs2/Makefile
+++ b/fs/ocfs2/Makefile
@@ -1,7 +1,5 @@
 ccflags-y := -Ifs/ocfs2
 
-ccflags-y += -DCATCH_BH_JBD_RACES
-
 obj-$(CONFIG_OCFS2_FS) +=       \
         ocfs2.o                 \
         ocfs2_stackglue.o
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
index fe50ded1b4ce..498641eed2db 100644
--- a/fs/ocfs2/buffer_head_io.c
+++ b/fs/ocfs2/buffer_head_io.c
@@ -139,11 +139,16 @@ int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
 
                 lock_buffer(bh);
                 if (buffer_jbd(bh)) {
+#ifdef CATCH_BH_JBD_RACES
                         mlog(ML_ERROR,
                              "block %llu had the JBD bit set "
                              "while I was in lock_buffer!",
                              (unsigned long long)bh->b_blocknr);
                         BUG();
+#else
+                        unlock_buffer(bh);
+                        continue;
+#endif
                 }
 
                 clear_buffer_uptodate(bh);
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 22f0253a3567..c2a6b0894022 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -405,12 +405,21 @@ static int ovl_create_or_link(struct dentry *dentry, int mode, dev_t rdev,
                 err = ovl_create_upper(dentry, inode, &stat, link, hardlink);
         } else {
                 const struct cred *old_cred;
+                struct cred *override_cred;
 
                 old_cred = ovl_override_creds(dentry->d_sb);
 
-                err = ovl_create_over_whiteout(dentry, inode, &stat, link,
-                                               hardlink);
+                err = -ENOMEM;
+                override_cred = prepare_creds();
+                if (override_cred) {
+                        override_cred->fsuid = old_cred->fsuid;
+                        override_cred->fsgid = old_cred->fsgid;
+                        put_cred(override_creds(override_cred));
+                        put_cred(override_cred);
 
+                        err = ovl_create_over_whiteout(dentry, inode, &stat,
+                                                       link, hardlink);
+                }
                 revert_creds(old_cred);
         }
 
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 0ed7c4012437..1dbeab6cf96e 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -238,41 +238,27 @@ out:
         return err;
 }
 
-static bool ovl_need_xattr_filter(struct dentry *dentry,
-                                  enum ovl_path_type type)
-{
-        if ((type & (__OVL_PATH_PURE | __OVL_PATH_UPPER)) == __OVL_PATH_UPPER)
-                return S_ISDIR(dentry->d_inode->i_mode);
-        else
-                return false;
-}
-
 ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
                      const char *name, void *value, size_t size)
 {
-        struct path realpath;
-        enum ovl_path_type type = ovl_path_real(dentry, &realpath);
+        struct dentry *realdentry = ovl_dentry_real(dentry);
 
-        if (ovl_need_xattr_filter(dentry, type) && ovl_is_private_xattr(name))
+        if (ovl_is_private_xattr(name))
                 return -ENODATA;
 
-        return vfs_getxattr(realpath.dentry, name, value, size);
+        return vfs_getxattr(realdentry, name, value, size);
 }
 
 ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
 {
-        struct path realpath;
-        enum ovl_path_type type = ovl_path_real(dentry, &realpath);
+        struct dentry *realdentry = ovl_dentry_real(dentry);
         ssize_t res;
         int off;
 
-        res = vfs_listxattr(realpath.dentry, list, size);
+        res = vfs_listxattr(realdentry, list, size);
         if (res <= 0 || size == 0)
                 return res;
 
-        if (!ovl_need_xattr_filter(dentry, type))
-                return res;
-
         /* filter out private xattrs */
         for (off = 0; off < res;) {
                 char *s = list + off;
@@ -302,7 +288,7 @@ int ovl_removexattr(struct dentry *dentry, const char *name)
                 goto out;
 
         err = -ENODATA;
-        if (ovl_need_xattr_filter(dentry, type) && ovl_is_private_xattr(name))
+        if (ovl_is_private_xattr(name))
                 goto out_drop_write;
 
         if (!OVL_TYPE_UPPER(type)) {
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 8a4a266beff3..edc452c2a563 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -820,39 +820,43 @@ posix_acl_xattr_get(const struct xattr_handler *handler,
         return error;
 }
 
-static int
-posix_acl_xattr_set(const struct xattr_handler *handler,
-                    struct dentry *unused, struct inode *inode,
-                    const char *name, const void *value,
-                    size_t size, int flags)
+int
+set_posix_acl(struct inode *inode, int type, struct posix_acl *acl)
 {
-        struct posix_acl *acl = NULL;
-        int ret;
-
         if (!IS_POSIXACL(inode))
                 return -EOPNOTSUPP;
         if (!inode->i_op->set_acl)
                 return -EOPNOTSUPP;
 
-        if (handler->flags == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode))
-                return value ? -EACCES : 0;
+        if (type == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode))
+                return acl ? -EACCES : 0;
         if (!inode_owner_or_capable(inode))
                 return -EPERM;
 
+        if (acl) {
+                int ret = posix_acl_valid(acl);
+                if (ret)
+                        return ret;
+        }
+        return inode->i_op->set_acl(inode, acl, type);
+}
+EXPORT_SYMBOL(set_posix_acl);
+
+static int
+posix_acl_xattr_set(const struct xattr_handler *handler,
+                    struct dentry *unused, struct inode *inode,
+                    const char *name, const void *value,
+                    size_t size, int flags)
+{
+        struct posix_acl *acl = NULL;
+        int ret;
+
         if (value) {
                 acl = posix_acl_from_xattr(&init_user_ns, value, size);
                 if (IS_ERR(acl))
                         return PTR_ERR(acl);
-
-                if (acl) {
-                        ret = posix_acl_valid(acl);
-                        if (ret)
-                                goto out;
-                }
         }
-
-        ret = inode->i_op->set_acl(inode, acl, handler->flags);
-out:
+        ret = set_posix_acl(inode, handler->flags, acl);
         posix_acl_release(acl);
         return ret;
 }
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 55bc7d6c8aac..06702783bf40 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -121,6 +121,13 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
         if (IS_ERR(sb))
                 return ERR_CAST(sb);
 
+        /*
+         * procfs isn't actually a stacking filesystem; however, there is
+         * too much magic going on inside it to permit stacking things on
+         * top of it
+         */
+        sb->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH;
+
         if (!proc_parse_options(options, ns)) {
                 deactivate_locked_super(sb);
                 return ERR_PTR(-EINVAL);
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index b8f2d1e8c645..c72c16c5a60f 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1393,7 +1393,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
         unsigned long safe_mask = 0;
         unsigned int commit_max_age = (unsigned int)-1;
         struct reiserfs_journal *journal = SB_JOURNAL(s);
-        char *new_opts = kstrdup(arg, GFP_KERNEL);
+        char *new_opts;
         int err;
         char *qf_names[REISERFS_MAXQUOTAS];
         unsigned int qfmt = 0;
@@ -1401,6 +1401,10 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
         int i;
 #endif
 
+        new_opts = kstrdup(arg, GFP_KERNEL);
+        if (arg && !new_opts)
+                return -ENOMEM;
+
         sync_filesystem(s);
         reiserfs_write_lock(s);
 
@@ -1546,7 +1550,8 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
         }
 
 out_ok_unlocked:
-        replace_mount_options(s, new_opts);
+        if (new_opts)
+                replace_mount_options(s, new_opts);
         return 0;
 
 out_err_unlock:
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 08316972ff93..7bbf420d1289 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -52,6 +52,7 @@
 #include "ubifs.h"
 #include <linux/mount.h>
 #include <linux/slab.h>
+#include <linux/migrate.h>
 
 static int read_block(struct inode *inode, void *addr, unsigned int block,
                       struct ubifs_data_node *dn)
@@ -1452,6 +1453,26 @@ static int ubifs_set_page_dirty(struct page *page)
         return ret;
 }
 
+#ifdef CONFIG_MIGRATION
+static int ubifs_migrate_page(struct address_space *mapping,
+                struct page *newpage, struct page *page, enum migrate_mode mode)
+{
+        int rc;
+
+        rc = migrate_page_move_mapping(mapping, newpage, page, NULL, mode, 0);
+        if (rc != MIGRATEPAGE_SUCCESS)
+                return rc;
+
+        if (PagePrivate(page)) {
+                ClearPagePrivate(page);
+                SetPagePrivate(newpage);
+        }
+
+        migrate_page_copy(newpage, page);
+        return MIGRATEPAGE_SUCCESS;
+}
+#endif
+
 static int ubifs_releasepage(struct page *page, gfp_t unused_gfp_flags)
 {
         /*
@@ -1591,6 +1612,9 @@ const struct address_space_operations ubifs_file_address_operations = {
         .write_end      = ubifs_write_end,
         .invalidatepage = ubifs_invalidatepage,
         .set_page_dirty = ubifs_set_page_dirty,
+#ifdef CONFIG_MIGRATION
+        .migratepage    = ubifs_migrate_page,
+#endif
         .releasepage    = ubifs_releasepage,
 };
 
diff --git a/fs/udf/partition.c b/fs/udf/partition.c
index 5f861ed287c3..888c364b2fe9 100644
--- a/fs/udf/partition.c
+++ b/fs/udf/partition.c
@@ -295,7 +295,8 @@ static uint32_t udf_try_read_meta(struct inode *inode, uint32_t block,
                 map = &UDF_SB(sb)->s_partmaps[partition];
                 /* map to sparable/physical partition desc */
                 phyblock = udf_get_pblock(sb, eloc.logicalBlockNum,
-                        map->s_partition_num, ext_offset + offset);
+                        map->s_type_specific.s_metadata.s_phys_partition_ref,
+                        ext_offset + offset);
         }
 
         brelse(epos.bh);
@@ -317,14 +318,18 @@ uint32_t udf_get_pblock_meta25(struct super_block *sb, uint32_t block,
         mdata = &map->s_type_specific.s_metadata;
         inode = mdata->s_metadata_fe ? : mdata->s_mirror_fe;
 
-        /* We shouldn't mount such media... */
-        BUG_ON(!inode);
+        if (!inode)
+                return 0xFFFFFFFF;
+
         retblk = udf_try_read_meta(inode, block, partition, offset);
         if (retblk == 0xFFFFFFFF && mdata->s_metadata_fe) {
                 udf_warn(sb, "error reading from METADATA, trying to read from MIRROR\n");
                 if (!(mdata->s_flags & MF_MIRROR_FE_LOADED)) {
                         mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
-                                mdata->s_mirror_file_loc, map->s_partition_num);
+                                mdata->s_mirror_file_loc,
+                                mdata->s_phys_partition_ref);
+                        if (IS_ERR(mdata->s_mirror_fe))
+                                mdata->s_mirror_fe = NULL;
                         mdata->s_flags |= MF_MIRROR_FE_LOADED;
                 }
 
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 5e2c8c814e1b..4942549e7dc8 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -951,13 +951,13 @@ out2:
 }
 
 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
-                                        u32 meta_file_loc, u32 partition_num)
+                                        u32 meta_file_loc, u32 partition_ref)
 {
         struct kernel_lb_addr addr;
         struct inode *metadata_fe;
 
         addr.logicalBlockNum = meta_file_loc;
-        addr.partitionReferenceNum = partition_num;
+        addr.partitionReferenceNum = partition_ref;
 
         metadata_fe = udf_iget_special(sb, &addr);
 
@@ -974,7 +974,8 @@ struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
         return metadata_fe;
 }
 
-static int udf_load_metadata_files(struct super_block *sb, int partition)
+static int udf_load_metadata_files(struct super_block *sb, int partition,
+                                   int type1_index)
 {
         struct udf_sb_info *sbi = UDF_SB(sb);
         struct udf_part_map *map;
@@ -984,20 +985,21 @@ static int udf_load_metadata_files(struct super_block *sb, int partition)
 
         map = &sbi->s_partmaps[partition];
         mdata = &map->s_type_specific.s_metadata;
+        mdata->s_phys_partition_ref = type1_index;
 
         /* metadata address */
         udf_debug("Metadata file location: block = %d part = %d\n",
-                  mdata->s_meta_file_loc, map->s_partition_num);
+                  mdata->s_meta_file_loc, mdata->s_phys_partition_ref);
 
         fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
-                                         map->s_partition_num);
+                                         mdata->s_phys_partition_ref);
         if (IS_ERR(fe)) {
                 /* mirror file entry */
                 udf_debug("Mirror metadata file location: block = %d part = %d\n",
-                          mdata->s_mirror_file_loc, map->s_partition_num);
+                          mdata->s_mirror_file_loc, mdata->s_phys_partition_ref);
 
                 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
-                                                 map->s_partition_num);
+                                                 mdata->s_phys_partition_ref);
 
                 if (IS_ERR(fe)) {
                         udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
@@ -1015,7 +1017,7 @@ static int udf_load_metadata_files(struct super_block *sb, int partition)
         */
         if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
                 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
-                addr.partitionReferenceNum = map->s_partition_num;
+                addr.partitionReferenceNum = mdata->s_phys_partition_ref;
 
                 udf_debug("Bitmap file location: block = %d part = %d\n",
                           addr.logicalBlockNum, addr.partitionReferenceNum);
@@ -1283,7 +1285,7 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
         p = (struct partitionDesc *)bh->b_data;
         partitionNumber = le16_to_cpu(p->partitionNumber);
 
-        /* First scan for TYPE1, SPARABLE and METADATA partitions */
+        /* First scan for TYPE1 and SPARABLE partitions */
         for (i = 0; i < sbi->s_partitions; i++) {
                 map = &sbi->s_partmaps[i];
                 udf_debug("Searching map: (%d == %d)\n",
@@ -1333,7 +1335,7 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
                 goto out_bh;
 
         if (map->s_partition_type == UDF_METADATA_MAP25) {
-                ret = udf_load_metadata_files(sb, i);
+                ret = udf_load_metadata_files(sb, i, type1_idx);
                 if (ret < 0) {
                         udf_err(sb, "error loading MetaData partition map %d\n",
                                 i);
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 27b5335730c9..c13875d669c0 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -61,6 +61,11 @@ struct udf_meta_data {
         __u32   s_bitmap_file_loc;
         __u32   s_alloc_unit_size;
         __u16   s_align_unit_size;
+        /*
+         * Partition Reference Number of the associated physical / sparable
+         * partition
+         */
+        __u16   s_phys_partition_ref;
         int     s_flags;
         struct inode *s_metadata_fe;
         struct inode *s_mirror_fe;