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Fix ENOTEMPTY check in btrfs_rmdir

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The ENOTEMPTY check in btrfs_rmdir isn't reliable. It's possible that
the backward search finds . or .. at first, then some other directory
entry. In that case,  btrfs_rmdir delete . or .. improperly.  The
patch also fixes a fs_mutex unlock issue in  btrfs_rmdir.

--

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan 2007-10-25 15:49:25 -04:00 committed by Chris Mason
parent 0d9f7f3e27
commit 134d451201
1 changed files with 4 additions and 1 deletions
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5
fs/btrfs/inode.c
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@ -448,6 +448,9 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
char *goodnames = "..";
unsigned long nr;
if (inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
path = btrfs_alloc_path();
BUG_ON(!path);
mutex_lock(&root->fs_info->fs_mutex);
@ -501,9 +504,9 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
out:
btrfs_release_path(root, path);
btrfs_free_path(path);
mutex_unlock(&root->fs_info->fs_mutex);
nr = trans->blocks_used;
ret = btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(root, nr);
if (ret && !err)
err = ret;