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authorDongsheng Yang <yangds.fnst@cn.fujitsu.com>2014-11-11 07:18:22 -0500
committerChris Mason <clm@fb.com>2015-04-13 07:52:51 -0700
commit09870d2772b284d0061a5e4d1e1cdf6fb6764344 (patch)
tree165d3cbb7ab0be6a0c1ae1120658b31a8ad39f2b /fs/btrfs/qgroup.c
parente2d1f92399afb6ec518b68867ed10db2585b283a (diff)
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>
Diffstat (limited to 'fs/btrfs/qgroup.c')
-rw-r--r--fs/btrfs/qgroup.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 17881ad8ed96..4ec86b3eee21 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -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;
}
}