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/ioctl.c b/fs/btrfs/ioctl.c
index 150784e936e6..ba484aac1b9c 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -147,6 +147,10 @@ static noinline int create_subvol(struct btrfs_root *root,
         if (ret)
                 goto fail;
 
+        btrfs_i_size_write(dir, dir->i_size + namelen * 2);
+        ret = btrfs_update_inode(trans, root, dir);
+        BUG_ON(ret);
+
         /* add the backref first */
         ret = btrfs_add_root_ref(trans, root->fs_info->tree_root,
                                  objectid, BTRFS_ROOT_BACKREF_KEY,