Commit 09870d27 authored by Dongsheng Yang's avatar Dongsheng Yang Committed by Chris Mason
Browse files

btrfs: qgroup: return EINVAL if level of parent is not higher than child's. 



When we create a subvol inheriting a qgroup, we need to check the level
of them. Otherwise, there is a chance a qgroup can inherit another qgroup
at the same level.

Signed-off-by: default avatarDongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent e2d1f923

fs/btrfs/qgroup.c

+5 −0
Original line number Diff line number Diff line
@@ -2230,6 +2230,11 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, 
				ret = -EINVAL;

				goto out;

			}



			if ((srcgroup->qgroupid >> 48) <= (objectid >> 48)) {

				ret = -EINVAL;

				goto out;

			}

			++i_qgroups;

		}

	}