btrfs: qgroup: warn about inconsistent qgroups when relation update fails

Calling btrfs_handle_fs_error() after btrfs_run_qgroups() fails to
update the qgroup status is probably not necessary, this would turn the
filesystem to read-only. For the same reason aborting the transaction is
also not a good option.

The state is left inconsistent and can be fixed by rescan, printing a
warning should be sufficient. Return code reflects the status of
adding/deleting the relation and if the transaction was ended properly.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index dc7300f..1c31df8 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3880,8 +3880,9 @@ static long btrfs_ioctl_qgroup_assign(struct file *file, void __user *arg)
        err = btrfs_run_qgroups(trans);
        mutex_unlock(&fs_info->qgroup_ioctl_lock);
        if (err < 0)
-               btrfs_handle_fs_error(fs_info, err,
-                                     "failed to update qgroup status and info");
+               btrfs_warn(fs_info,
+                          "qgroup status update failed after %s relation, marked as inconsistent",
+                          sa->assign ? "adding" : "deleting");
        err = btrfs_end_transaction(trans);
        if (err && !ret)
                ret = err;