482 static unsigned int mctp_route_mtu(struct mctp_route *rt)  in mctp_route_mtu()  argument
484 	return rt->mtu ?: READ_ONCE(rt->dev->dev->mtu);  in mctp_route_mtu()
535 static void mctp_route_release(struct mctp_route *rt)  in mctp_route_release()  argument
537 	if (refcount_dec_and_test(&rt->refs)) {  in mctp_route_release()
538 		mctp_dev_put(rt->dev);  in mctp_route_release()
539 		kfree_rcu(rt, rcu);  in mctp_route_release()
546 	struct mctp_route *rt;  in mctp_route_alloc()  local
548 	rt = kzalloc(sizeof(*rt), GFP_KERNEL);  in mctp_route_alloc()
549 	if (!rt)  in mctp_route_alloc()
552 	INIT_LIST_HEAD(&rt->list);  in mctp_route_alloc()
553 	refcount_set(&rt->refs, 1);  in mctp_route_alloc()
554 	rt->output = mctp_route_discard;  in mctp_route_alloc()
556 	return rt;  in mctp_route_alloc()
710 static bool mctp_rt_match_eid(struct mctp_route *rt,  in mctp_rt_match_eid()  argument
713 	return READ_ONCE(rt->dev->net) == net &&  in mctp_rt_match_eid()
714 		rt->min <= eid && rt->max >= eid;  in mctp_rt_match_eid()
730 	struct mctp_route *tmp, *rt = NULL;  in mctp_route_lookup()  local
736 				rt = tmp;  in mctp_route_lookup()
742 	return rt;  in mctp_route_lookup()
748 	struct mctp_route *rt;  in mctp_route_lookup_null()  local
750 	list_for_each_entry_rcu(rt, &net->mctp.routes, list) {  in mctp_route_lookup_null()
751 		if (rt->dev->dev == dev && rt->type == RTN_LOCAL &&  in mctp_route_lookup_null()
752 		    refcount_inc_not_zero(&rt->refs))  in mctp_route_lookup_null()
753 			return rt;  in mctp_route_lookup_null()
759 static int mctp_do_fragment_route(struct mctp_route *rt, struct sk_buff *skb,  in mctp_do_fragment_route()  argument
829 		rc = rt->output(rt, skb2);  in mctp_do_fragment_route()
841 int mctp_local_output(struct sock *sk, struct mctp_route *rt,  in mctp_local_output()  argument
858 	if (rt) {  in mctp_local_output()
860 		if (WARN_ON(!rt->dev))  in mctp_local_output()
867 		rt = &tmp_rt;  in mctp_local_output()
875 		rt->dev = __mctp_dev_get(dev);  in mctp_local_output()
878 		if (!rt->dev)  in mctp_local_output()
884 		rt->output = mctp_route_output;  in mctp_local_output()
885 		rt->mtu = 0;  in mctp_local_output()
891 	spin_lock_irqsave(&rt->dev->addrs_lock, flags);  in mctp_local_output()
892 	if (rt->dev->num_addrs == 0) {  in mctp_local_output()
896 		saddr = rt->dev->addrs[0];  in mctp_local_output()
899 	spin_unlock_irqrestore(&rt->dev->addrs_lock, flags);  in mctp_local_output()
930 	skb->dev = rt->dev->dev;  in mctp_local_output()
941 	mtu = mctp_route_mtu(rt);  in mctp_local_output()
946 		rc = rt->output(rt, skb);  in mctp_local_output()
948 		rc = mctp_do_fragment_route(rt, skb, mtu, tag);  in mctp_local_output()
953 		mctp_route_release(rt);  in mctp_local_output()
965 	int (*rtfn)(struct mctp_route *rt, struct sk_buff *skb);  in mctp_route_add()
967 	struct mctp_route *rt, *ert;  in mctp_route_add()  local
986 	rt = mctp_route_alloc();  in mctp_route_add()
987 	if (!rt)  in mctp_route_add()
990 	rt->min = daddr_start;  in mctp_route_add()
991 	rt->max = daddr_start + daddr_extent;  in mctp_route_add()
992 	rt->mtu = mtu;  in mctp_route_add()
993 	rt->dev = mdev;  in mctp_route_add()
994 	mctp_dev_hold(rt->dev);  in mctp_route_add()
995 	rt->type = type;  in mctp_route_add()
996 	rt->output = rtfn;  in mctp_route_add()
1001 		if (mctp_rt_compare_exact(rt, ert)) {  in mctp_route_add()
1002 			mctp_route_release(rt);  in mctp_route_add()
1007 	list_add_rcu(&rt->list, &net->mctp.routes);  in mctp_route_add()
1016 	struct mctp_route *rt, *tmp;  in mctp_route_remove()  local
1028 	list_for_each_entry_safe(rt, tmp, &net->mctp.routes, list) {  in mctp_route_remove()
1029 		if (rt->dev == mdev &&  in mctp_route_remove()
1030 		    rt->min == daddr_start && rt->max == daddr_end &&  in mctp_route_remove()
1031 		    rt->type == type) {  in mctp_route_remove()
1032 			list_del_rcu(&rt->list);  in mctp_route_remove()
1034 			mctp_route_release(rt);  in mctp_route_remove()
1056 	struct mctp_route *rt, *tmp;  in mctp_route_remove_dev()  local
1059 	list_for_each_entry_safe(rt, tmp, &net->mctp.routes, list) {  in mctp_route_remove_dev()
1060 		if (rt->dev == mdev) {  in mctp_route_remove_dev()
1061 			list_del_rcu(&rt->list);  in mctp_route_remove_dev()
1063 			mctp_route_release(rt);  in mctp_route_remove_dev()
1077 	struct mctp_route *rt;  in mctp_pkttype_receive()  local
1120 	rt = mctp_route_lookup(net, cb->net, mh->dest);  in mctp_pkttype_receive()
1123 	if (!rt && mh->dest == MCTP_ADDR_NULL && skb->pkt_type == PACKET_HOST)  in mctp_pkttype_receive()
1124 		rt = mctp_route_lookup_null(net, dev);  in mctp_pkttype_receive()
1126 	if (!rt)  in mctp_pkttype_receive()
1129 	rt->output(rt, skb);  in mctp_pkttype_receive()
1130 	mctp_route_release(rt);  in mctp_pkttype_receive()
1274 static int mctp_fill_rtinfo(struct sk_buff *skb, struct mctp_route *rt,  in mctp_fill_rtinfo()  argument
1291 	hdr->rtm_dst_len = rt->max - rt->min;  in mctp_fill_rtinfo()
1297 	hdr->rtm_type = rt->type;  in mctp_fill_rtinfo()
1299 	if (nla_put_u8(skb, RTA_DST, rt->min))  in mctp_fill_rtinfo()
1306 	if (rt->mtu) {  in mctp_fill_rtinfo()
1307 		if (nla_put_u32(skb, RTAX_MTU, rt->mtu))  in mctp_fill_rtinfo()
1313 	if (rt->dev) {  in mctp_fill_rtinfo()
1314 		if (nla_put_u32(skb, RTA_OIF, rt->dev->dev->ifindex))  in mctp_fill_rtinfo()
1332 	struct mctp_route *rt;  in mctp_dump_rtinfo()  local
1344 	list_for_each_entry_rcu(rt, &net->mctp.routes, list) {  in mctp_dump_rtinfo()
1347 		if (mctp_fill_rtinfo(skb, rt,  in mctp_dump_rtinfo()
1376 	struct mctp_route *rt;  in mctp_routes_net_exit()  local
1379 	list_for_each_entry_rcu(rt, &net->mctp.routes, list)  in mctp_routes_net_exit()
1380 		mctp_route_release(rt);  in mctp_routes_net_exit()