From: Qu Wenruo <wqu@suse.com>
Date: Tue, 20 Feb 2024 04:01:34 +0000 (+1030)
Subject: btrfs: detect regular qgroup for older kernels correctly
X-Git-Tag: v2024.03.03~13
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=662db267353858df126c1fc731fbe77fe4b3e1bf;p=xfstests-dev.git

btrfs: detect regular qgroup for older kernels correctly

[BUG]
When running an older (vendoer v6.4) kernel, some qgroup test cases
would be skipped:

  btrfs/017 1s ... [not run] not running normal qgroups

[CAUSE]
With the introduce of simple quota mode, there is a new sysfs interface,
/sys/fs/btrfs/<uuid>/qgroups/mode to indicate the currently running
qgroup modes.

And _qgroup_mode() from `common/btrfs` is using that new interface to
detect the mode.

Unfortuantely for older kernels without simple quota support,
_qgroup_mode() would return "disabled" directly, causing those test case
to be skipped.

[FIX]
Fallback to regular qgroup if that sysfs interface is not accessible, as
qgroup is introduced from the very beginning of btrfs, thus the regular
qgroup is always supported.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
---

diff --git a/common/btrfs b/common/btrfs
index 7141a0bb..3eb2a91b 100644
--- a/common/btrfs
+++ b/common/btrfs
@@ -739,7 +739,7 @@ _qgroup_mode()
 	if _has_fs_sysfs_attr $dev /qgroups/mode; then
 		_get_fs_sysfs_attr $dev qgroups/mode
 	else
-		echo "disabled"
+		echo "qgroup"
 	fi
 }