559 static unsigned int mctp_route_mtu(struct mctp_route *rt)  in mctp_route_mtu()  argument
561 	return rt->mtu ?: READ_ONCE(rt->dev->dev->mtu);  in mctp_route_mtu()
612 static void mctp_route_release(struct mctp_route *rt)  in mctp_route_release()  argument
614 	if (refcount_dec_and_test(&rt->refs)) {  in mctp_route_release()
615 		mctp_dev_put(rt->dev);  in mctp_route_release()
616 		kfree_rcu(rt, rcu);  in mctp_route_release()
623 	struct mctp_route *rt;  in mctp_route_alloc()  local
625 	rt = kzalloc(sizeof(*rt), GFP_KERNEL);  in mctp_route_alloc()
626 	if (!rt)  in mctp_route_alloc()
629 	INIT_LIST_HEAD(&rt->list);  in mctp_route_alloc()
630 	refcount_set(&rt->refs, 1);  in mctp_route_alloc()
631 	rt->output = mctp_route_discard;  in mctp_route_alloc()
633 	return rt;  in mctp_route_alloc()
804 static bool mctp_rt_match_eid(struct mctp_route *rt,  in mctp_rt_match_eid()  argument
807 	return READ_ONCE(rt->dev->net) == net &&  in mctp_rt_match_eid()
808 		rt->min <= eid && rt->max >= eid;  in mctp_rt_match_eid()
824 	struct mctp_route *tmp, *rt = NULL;  in mctp_route_lookup()  local
832 				rt = tmp;  in mctp_route_lookup()
840 	return rt;  in mctp_route_lookup()
846 	struct mctp_route *tmp, *rt = NULL;  in mctp_route_lookup_null()  local
853 			rt = tmp;  in mctp_route_lookup_null()
860 	return rt;  in mctp_route_lookup_null()
863 static int mctp_do_fragment_route(struct mctp_route *rt, struct sk_buff *skb,  in mctp_do_fragment_route()  argument
936 		rc = rt->output(rt, skb2);  in mctp_do_fragment_route()
948 int mctp_local_output(struct sock *sk, struct mctp_route *rt,  in mctp_local_output()  argument
966 	if (rt) {  in mctp_local_output()
968 		if (WARN_ON(!rt->dev))  in mctp_local_output()
975 		rt = &tmp_rt;  in mctp_local_output()
983 		rt->dev = __mctp_dev_get(dev);  in mctp_local_output()
986 		if (!rt->dev)  in mctp_local_output()
992 		rt->output = mctp_route_output;  in mctp_local_output()
993 		rt->mtu = 0;  in mctp_local_output()
1000 	spin_lock_irqsave(&rt->dev->addrs_lock, flags);  in mctp_local_output()
1001 	if (rt->dev->num_addrs == 0) {  in mctp_local_output()
1005 		saddr = rt->dev->addrs[0];  in mctp_local_output()
1008 	spin_unlock_irqrestore(&rt->dev->addrs_lock, flags);  in mctp_local_output()
1009 	netid = READ_ONCE(rt->dev->net);  in mctp_local_output()
1040 	skb->dev = rt->dev->dev;  in mctp_local_output()
1051 	mtu = mctp_route_mtu(rt);  in mctp_local_output()
1056 		rc = rt->output(rt, skb);  in mctp_local_output()
1058 		rc = mctp_do_fragment_route(rt, skb, mtu, tag);  in mctp_local_output()
1066 		mctp_route_release(rt);  in mctp_local_output()
1080 	int (*rtfn)(struct mctp_route *rt, struct sk_buff *skb);  in mctp_route_add()
1082 	struct mctp_route *rt, *ert;  in mctp_route_add()  local
1101 	rt = mctp_route_alloc();  in mctp_route_add()
1102 	if (!rt)  in mctp_route_add()
1105 	rt->min = daddr_start;  in mctp_route_add()
1106 	rt->max = daddr_start + daddr_extent;  in mctp_route_add()
1107 	rt->mtu = mtu;  in mctp_route_add()
1108 	rt->dev = mdev;  in mctp_route_add()
1109 	mctp_dev_hold(rt->dev);  in mctp_route_add()
1110 	rt->type = type;  in mctp_route_add()
1111 	rt->output = rtfn;  in mctp_route_add()
1116 		if (mctp_rt_compare_exact(rt, ert)) {  in mctp_route_add()
1117 			mctp_route_release(rt);  in mctp_route_add()
1122 	list_add_rcu(&rt->list, &net->mctp.routes);  in mctp_route_add()
1131 	struct mctp_route *rt, *tmp;  in mctp_route_remove()  local
1143 	list_for_each_entry_safe(rt, tmp, &net->mctp.routes, list) {  in mctp_route_remove()
1144 		if (rt->dev == mdev &&  in mctp_route_remove()
1145 		    rt->min == daddr_start && rt->max == daddr_end &&  in mctp_route_remove()
1146 		    rt->type == type) {  in mctp_route_remove()
1147 			list_del_rcu(&rt->list);  in mctp_route_remove()
1149 			mctp_route_release(rt);  in mctp_route_remove()
1171 	struct mctp_route *rt, *tmp;  in mctp_route_remove_dev()  local
1174 	list_for_each_entry_safe(rt, tmp, &net->mctp.routes, list) {  in mctp_route_remove_dev()
1175 		if (rt->dev == mdev) {  in mctp_route_remove_dev()
1176 			list_del_rcu(&rt->list);  in mctp_route_remove_dev()
1178 			mctp_route_release(rt);  in mctp_route_remove_dev()
1192 	struct mctp_route *rt;  in mctp_pkttype_receive()  local
1235 	rt = mctp_route_lookup(net, cb->net, mh->dest);  in mctp_pkttype_receive()
1238 	if (!rt && mh->dest == MCTP_ADDR_NULL && skb->pkt_type == PACKET_HOST)  in mctp_pkttype_receive()
1239 		rt = mctp_route_lookup_null(net, dev);  in mctp_pkttype_receive()
1241 	if (!rt)  in mctp_pkttype_receive()
1244 	rt->output(rt, skb);  in mctp_pkttype_receive()
1245 	mctp_route_release(rt);  in mctp_pkttype_receive()
1386 static int mctp_fill_rtinfo(struct sk_buff *skb, struct mctp_route *rt,  in mctp_fill_rtinfo()  argument
1403 	hdr->rtm_dst_len = rt->max - rt->min;  in mctp_fill_rtinfo()
1409 	hdr->rtm_type = rt->type;  in mctp_fill_rtinfo()
1411 	if (nla_put_u8(skb, RTA_DST, rt->min))  in mctp_fill_rtinfo()
1418 	if (rt->mtu) {  in mctp_fill_rtinfo()
1419 		if (nla_put_u32(skb, RTAX_MTU, rt->mtu))  in mctp_fill_rtinfo()
1425 	if (rt->dev) {  in mctp_fill_rtinfo()
1426 		if (nla_put_u32(skb, RTA_OIF, rt->dev->dev->ifindex))  in mctp_fill_rtinfo()
1444 	struct mctp_route *rt;  in mctp_dump_rtinfo()  local
1456 	list_for_each_entry_rcu(rt, &net->mctp.routes, list) {  in mctp_dump_rtinfo()
1459 		if (mctp_fill_rtinfo(skb, rt,  in mctp_dump_rtinfo()
1488 	struct mctp_route *rt;  in mctp_routes_net_exit()  local
1491 	list_for_each_entry_rcu(rt, &net->mctp.routes, list)  in mctp_routes_net_exit()
1492 		mctp_route_release(rt);  in mctp_routes_net_exit()