static void rbd_object_map_name(struct rbd_device *rbd_dev, u64 snap_id,
				struct ceph_object_id *oid)
{
	if (snap_id == CEPH_NOSNAP)
		ceph_oid_printf(oid, "%s%s", RBD_OBJECT_MAP_PREFIX,
				rbd_dev->spec->image_id);
	else
		ceph_oid_printf(oid, "%s%s.%016llx", RBD_OBJECT_MAP_PREFIX,
				rbd_dev->spec->image_id, snap_id);
}
static void rbd_object_map_name(struct rbd_device *rbd_dev, u64 snap_id,
				struct ceph_object_id *oid)
{
	if (snap_id == CEPH_NOSNAP)
		ceph_oid_printf(oid, "%s%s", RBD_OBJECT_MAP_PREFIX,
				rbd_dev->spec->image_id);
	else
		ceph_oid_printf(oid, "%s%s.%016llx", RBD_OBJECT_MAP_PREFIX,
				rbd_dev->spec->image_id, snap_id);
}