xfrm_dst_hash
h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,