Btrfs: update directory's size when creating subvol/snapshot

Make sure directory's size properly updated when creating
subvol/snapshot.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 4604178a43a9..4e7b56e9d3a5 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -819,6 +819,10 @@ static noinline int finish_pending_snapshot(struct btrfs_fs_info *fs_info,
         if (ret)
                 goto fail;
 
+        btrfs_i_size_write(parent_inode, parent_inode->i_size + namelen * 2);
+        ret = btrfs_update_inode(trans, parent_root, parent_inode);
+        BUG_ON(ret);
+
         /* add the backref first */
         ret = btrfs_add_root_ref(trans, parent_root->fs_info->tree_root,
                                  pending->root_key.objectid,