Wang Shilong
2013-Feb-25 14:02 UTC
[PATCH 2/4] Btrfs-progs: disable qgroup level 0 for userspace use
From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
To implement a strict hierarchy quota, qgroup level 0
should not be allowed to create/destroy by users.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
---
cmds-qgroup.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/cmds-qgroup.c b/cmds-qgroup.c
index 26f0ab0..06505fa 100644
--- a/cmds-qgroup.c
+++ b/cmds-qgroup.c
@@ -86,6 +86,11 @@ static int qgroup_create(int create, int argc, char **argv)
memset(&args, 0, sizeof(args));
args.create = create;
args.qgroupid = parse_qgroupid(argv[1]);
+ if (!(args.qgroupid >> 48)) {
+ fprintf(stderr, "ERROR: unable to create/destroy qgroup "
+ "level 0\n");
+ return 30;
+ }
fd = open_file_or_dir(path);
if (fd < 0) {
--
1.7.7.6
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