The use of btrfs_dentry_delete is removing dentries from the
dcache when deleting subvolumne. btrfs_dentry_delete ignores
negative dentries. This is incorrect since if we don't remove
the negative dentry, its parent dentry can't be removed.
Signed-off-by: Yan Zheng <zheng.yan@xxxxxxxxxx>
---
diff -urp 1/fs/btrfs/inode.c 2/fs/btrfs/inode.c
--- 1/fs/btrfs/inode.c 2009-10-02 14:36:55.383120732 +0800
+++ 2/fs/btrfs/inode.c 2009-10-09 09:54:01.591286200 +0800
@@ -3598,12 +3598,14 @@ static int btrfs_dentry_delete(struct de
{
struct btrfs_root *root;
- if (!dentry->d_inode)
- return 0;
+ if (!dentry->d_inode && !IS_ROOT(dentry))
+ dentry = dentry->d_parent;
- root = BTRFS_I(dentry->d_inode)->root;
- if (btrfs_root_refs(&root->root_item) == 0)
- return 1;
+ if (dentry->d_inode) {
+ root = BTRFS_I(dentry->d_inode)->root;
+ if (btrfs_root_refs(&root->root_item) == 0)
+ return 1;
+ }
return 0;
}
diff -urp 1/fs/btrfs/ioctl.c 2/fs/btrfs/ioctl.c
--- 1/fs/btrfs/ioctl.c 2009-09-30 13:51:41.430296197 +0800
+++ 2/fs/btrfs/ioctl.c 2009-10-09 09:53:11.601275678 +0800
@@ -830,6 +830,7 @@ out_up_write:
out_unlock:
mutex_unlock(&inode->i_mutex);
if (!err) {
+ shrink_dcache_sb(root->fs_info->sb);
btrfs_invalidate_inodes(dest);
d_delete(dentry);
}
--
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