drbd: respect no-md-barriers setting also when changed online via disk-options
Lars Ellenberg [Thu, 25 Oct 2012 22:41:50 +0000 (00:41 +0200)]
We need to propagate the configuration into the flag bits,
or it won't be effective.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

drivers/block/drbd/drbd_nl.c

index 76bb3a6..536f94a 100644 (file)
@@ -1230,6 +1230,11 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
        else
                mdev->ldev->md.flags |= MDF_AL_DISABLED;
 
+       if (new_disk_conf->md_flushes)
+               clear_bit(MD_NO_FUA, &mdev->flags);
+       else
+               set_bit(MD_NO_FUA, &mdev->flags);
+
        drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush);
 
        drbd_md_sync(mdev);