Commit 09870d27 authored Nov 11, 2014 by Dongsheng Yang Committed by Chris Mason Apr 13, 2015

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: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Chris 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;
		}
		}