372 static unsigned int mctp_route_mtu(struct mctp_route *rt)  in mctp_route_mtu()  argument
374 	return rt->mtu ?: READ_ONCE(rt->dev->dev->mtu);  in mctp_route_mtu()
412 static void mctp_route_release(struct mctp_route *rt)  in mctp_route_release()  argument
414 	if (refcount_dec_and_test(&rt->refs)) {  in mctp_route_release()
415 		dev_put(rt->dev->dev);  in mctp_route_release()
416 		kfree_rcu(rt, rcu);  in mctp_route_release()
423 	struct mctp_route *rt;  in mctp_route_alloc()  local
425 	rt = kzalloc(sizeof(*rt), GFP_KERNEL);  in mctp_route_alloc()
426 	if (!rt)  in mctp_route_alloc()
429 	INIT_LIST_HEAD(&rt->list);  in mctp_route_alloc()
430 	refcount_set(&rt->refs, 1);  in mctp_route_alloc()
431 	rt->output = mctp_route_discard;  in mctp_route_alloc()
433 	return rt;  in mctp_route_alloc()
520 static bool mctp_rt_match_eid(struct mctp_route *rt,  in mctp_rt_match_eid()  argument
523 	return READ_ONCE(rt->dev->net) == net &&  in mctp_rt_match_eid()
524 		rt->min <= eid && rt->max >= eid;  in mctp_rt_match_eid()
540 	struct mctp_route *tmp, *rt = NULL;  in mctp_route_lookup()  local
546 				rt = tmp;  in mctp_route_lookup()
552 	return rt;  in mctp_route_lookup()
555 /* sends a skb to rt and releases the route. */
556 int mctp_do_route(struct mctp_route *rt, struct sk_buff *skb)  in mctp_do_route()  argument
560 	rc = rt->output(rt, skb);  in mctp_do_route()
561 	mctp_route_release(rt);  in mctp_do_route()
565 static int mctp_do_fragment_route(struct mctp_route *rt, struct sk_buff *skb,  in mctp_do_fragment_route()  argument
631 		/* do route, but don't drop the rt reference */  in mctp_do_fragment_route()
632 		rc = rt->output(rt, skb2);  in mctp_do_fragment_route()
640 	mctp_route_release(rt);  in mctp_do_fragment_route()
645 int mctp_local_output(struct sock *sk, struct mctp_route *rt,  in mctp_local_output()  argument
657 	if (WARN_ON(!rt->dev))  in mctp_local_output()
660 	spin_lock_irqsave(&rt->dev->addrs_lock, flags);  in mctp_local_output()
661 	if (rt->dev->num_addrs == 0) {  in mctp_local_output()
665 		saddr = rt->dev->addrs[0];  in mctp_local_output()
668 	spin_unlock_irqrestore(&rt->dev->addrs_lock, flags);  in mctp_local_output()
688 	skb->dev = rt->dev->dev;  in mctp_local_output()
699 	mtu = mctp_route_mtu(rt);  in mctp_local_output()
704 		return mctp_do_route(rt, skb);  in mctp_local_output()
706 		return mctp_do_fragment_route(rt, skb, mtu, tag);  in mctp_local_output()
715 	int (*rtfn)(struct mctp_route *rt, struct sk_buff *skb);  in mctp_route_add()
717 	struct mctp_route *rt, *ert;  in mctp_route_add()  local
736 	rt = mctp_route_alloc();  in mctp_route_add()
737 	if (!rt)  in mctp_route_add()
740 	rt->min = daddr_start;  in mctp_route_add()
741 	rt->max = daddr_start + daddr_extent;  in mctp_route_add()
742 	rt->mtu = mtu;  in mctp_route_add()
743 	rt->dev = mdev;  in mctp_route_add()
744 	dev_hold(rt->dev->dev);  in mctp_route_add()
745 	rt->type = type;  in mctp_route_add()
746 	rt->output = rtfn;  in mctp_route_add()
751 		if (mctp_rt_compare_exact(rt, ert)) {  in mctp_route_add()
752 			mctp_route_release(rt);  in mctp_route_add()
757 	list_add_rcu(&rt->list, &net->mctp.routes);  in mctp_route_add()
766 	struct mctp_route *rt, *tmp;  in mctp_route_remove()  local
778 	list_for_each_entry_safe(rt, tmp, &net->mctp.routes, list) {  in mctp_route_remove()
779 		if (rt->dev == mdev &&  in mctp_route_remove()
780 		    rt->min == daddr_start && rt->max == daddr_end) {  in mctp_route_remove()
781 			list_del_rcu(&rt->list);  in mctp_route_remove()
783 			mctp_route_release(rt);  in mctp_route_remove()
805 	struct mctp_route *rt, *tmp;  in mctp_route_remove_dev()  local
808 	list_for_each_entry_safe(rt, tmp, &net->mctp.routes, list) {  in mctp_route_remove_dev()
809 		if (rt->dev == mdev) {  in mctp_route_remove_dev()
810 			list_del_rcu(&rt->list);  in mctp_route_remove_dev()
812 			mctp_route_release(rt);  in mctp_route_remove_dev()
825 	struct mctp_route *rt;  in mctp_pkttype_receive()  local
848 	rt = mctp_route_lookup(net, cb->net, mh->dest);  in mctp_pkttype_receive()
849 	if (!rt)  in mctp_pkttype_receive()
852 	mctp_do_route(rt, skb);  in mctp_pkttype_receive()
982 static int mctp_fill_rtinfo(struct sk_buff *skb, struct mctp_route *rt,  in mctp_fill_rtinfo()  argument
999 	hdr->rtm_dst_len = rt->max - rt->min;  in mctp_fill_rtinfo()
1005 	hdr->rtm_type = rt->type;  in mctp_fill_rtinfo()
1007 	if (nla_put_u8(skb, RTA_DST, rt->min))  in mctp_fill_rtinfo()
1014 	if (rt->mtu) {  in mctp_fill_rtinfo()
1015 		if (nla_put_u32(skb, RTAX_MTU, rt->mtu))  in mctp_fill_rtinfo()
1021 	if (rt->dev) {  in mctp_fill_rtinfo()
1022 		if (nla_put_u32(skb, RTA_OIF, rt->dev->dev->ifindex))  in mctp_fill_rtinfo()
1040 	struct mctp_route *rt;  in mctp_dump_rtinfo()  local
1052 	list_for_each_entry_rcu(rt, &net->mctp.routes, list) {  in mctp_dump_rtinfo()
1055 		if (mctp_fill_rtinfo(skb, rt,  in mctp_dump_rtinfo()
1084 	struct mctp_route *rt;  in mctp_routes_net_exit()  local
1087 	list_for_each_entry_rcu(rt, &net->mctp.routes, list)  in mctp_routes_net_exit()
1088 		mctp_route_release(rt);  in mctp_routes_net_exit()