2 * Bridge multicast support.
4 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
13 #include <linux/err.h>
14 #include <linux/export.h>
15 #include <linux/if_ether.h>
16 #include <linux/igmp.h>
17 #include <linux/jhash.h>
18 #include <linux/kernel.h>
19 #include <linux/log2.h>
20 #include <linux/netdevice.h>
21 #include <linux/netfilter_bridge.h>
22 #include <linux/random.h>
23 #include <linux/rculist.h>
24 #include <linux/skbuff.h>
25 #include <linux/slab.h>
26 #include <linux/timer.h>
27 #include <linux/inetdevice.h>
28 #include <linux/mroute.h>
30 #include <net/switchdev.h>
31 #if IS_ENABLED(CONFIG_IPV6)
34 #include <net/ip6_checksum.h>
35 #include <net/addrconf.h>
38 #include "br_private.h"
40 static void br_multicast_start_querier(struct net_bridge *br,
41 struct bridge_mcast_own_query *query);
42 static void br_multicast_add_router(struct net_bridge *br,
43 struct net_bridge_port *port);
44 static void br_ip4_multicast_leave_group(struct net_bridge *br,
45 struct net_bridge_port *port,
48 const unsigned char *src);
50 static void __del_port_router(struct net_bridge_port *p);
51 #if IS_ENABLED(CONFIG_IPV6)
52 static void br_ip6_multicast_leave_group(struct net_bridge *br,
53 struct net_bridge_port *port,
54 const struct in6_addr *group,
55 __u16 vid, const unsigned char *src);
57 unsigned int br_mdb_rehash_seq;
59 static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
61 if (a->proto != b->proto)
67 return a->u.ip4 == b->u.ip4;
68 #if IS_ENABLED(CONFIG_IPV6)
69 case htons(ETH_P_IPV6):
70 return ipv6_addr_equal(&a->u.ip6, &b->u.ip6);
76 static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip,
79 return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1);
82 #if IS_ENABLED(CONFIG_IPV6)
83 static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb,
84 const struct in6_addr *ip,
87 return jhash_2words(ipv6_addr_hash(ip), vid,
88 mdb->secret) & (mdb->max - 1);
92 static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb,
97 return __br_ip4_hash(mdb, ip->u.ip4, ip->vid);
98 #if IS_ENABLED(CONFIG_IPV6)
99 case htons(ETH_P_IPV6):
100 return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid);
106 static struct net_bridge_mdb_entry *__br_mdb_ip_get(
107 struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash)
109 struct net_bridge_mdb_entry *mp;
111 hlist_for_each_entry_rcu(mp, &mdb->mhash[hash], hlist[mdb->ver]) {
112 if (br_ip_equal(&mp->addr, dst))
119 struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge_mdb_htable *mdb,
125 return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst));
128 static struct net_bridge_mdb_entry *br_mdb_ip4_get(
129 struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vid)
134 br_dst.proto = htons(ETH_P_IP);
137 return br_mdb_ip_get(mdb, &br_dst);
140 #if IS_ENABLED(CONFIG_IPV6)
141 static struct net_bridge_mdb_entry *br_mdb_ip6_get(
142 struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst,
148 br_dst.proto = htons(ETH_P_IPV6);
151 return br_mdb_ip_get(mdb, &br_dst);
155 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
156 struct sk_buff *skb, u16 vid)
158 struct net_bridge_mdb_htable *mdb = rcu_dereference(br->mdb);
161 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
164 if (BR_INPUT_SKB_CB(skb)->igmp)
167 ip.proto = skb->protocol;
170 switch (skb->protocol) {
171 case htons(ETH_P_IP):
172 ip.u.ip4 = ip_hdr(skb)->daddr;
174 #if IS_ENABLED(CONFIG_IPV6)
175 case htons(ETH_P_IPV6):
176 ip.u.ip6 = ipv6_hdr(skb)->daddr;
183 return br_mdb_ip_get(mdb, &ip);
186 static void br_mdb_free(struct rcu_head *head)
188 struct net_bridge_mdb_htable *mdb =
189 container_of(head, struct net_bridge_mdb_htable, rcu);
190 struct net_bridge_mdb_htable *old = mdb->old;
197 static int br_mdb_copy(struct net_bridge_mdb_htable *new,
198 struct net_bridge_mdb_htable *old,
201 struct net_bridge_mdb_entry *mp;
206 for (i = 0; i < old->max; i++)
207 hlist_for_each_entry(mp, &old->mhash[i], hlist[old->ver])
208 hlist_add_head(&mp->hlist[new->ver],
209 &new->mhash[br_ip_hash(new, &mp->addr)]);
215 for (i = 0; i < new->max; i++) {
217 hlist_for_each_entry(mp, &new->mhash[i], hlist[new->ver])
223 return maxlen > elasticity ? -EINVAL : 0;
226 void br_multicast_free_pg(struct rcu_head *head)
228 struct net_bridge_port_group *p =
229 container_of(head, struct net_bridge_port_group, rcu);
234 static void br_multicast_free_group(struct rcu_head *head)
236 struct net_bridge_mdb_entry *mp =
237 container_of(head, struct net_bridge_mdb_entry, rcu);
242 static void br_multicast_group_expired(struct timer_list *t)
244 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
245 struct net_bridge *br = mp->br;
246 struct net_bridge_mdb_htable *mdb;
248 spin_lock(&br->multicast_lock);
249 if (!netif_running(br->dev) || timer_pending(&mp->timer))
252 mp->host_joined = false;
253 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0);
258 mdb = mlock_dereference(br->mdb, br);
260 hlist_del_rcu(&mp->hlist[mdb->ver]);
263 call_rcu_bh(&mp->rcu, br_multicast_free_group);
266 spin_unlock(&br->multicast_lock);
269 static void br_multicast_del_pg(struct net_bridge *br,
270 struct net_bridge_port_group *pg)
272 struct net_bridge_mdb_htable *mdb;
273 struct net_bridge_mdb_entry *mp;
274 struct net_bridge_port_group *p;
275 struct net_bridge_port_group __rcu **pp;
277 mdb = mlock_dereference(br->mdb, br);
279 mp = br_mdb_ip_get(mdb, &pg->addr);
283 for (pp = &mp->ports;
284 (p = mlock_dereference(*pp, br)) != NULL;
289 rcu_assign_pointer(*pp, p->next);
290 hlist_del_init(&p->mglist);
291 del_timer(&p->timer);
292 br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB,
294 call_rcu_bh(&p->rcu, br_multicast_free_pg);
296 if (!mp->ports && !mp->host_joined &&
297 netif_running(br->dev))
298 mod_timer(&mp->timer, jiffies);
306 static void br_multicast_port_group_expired(struct timer_list *t)
308 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
309 struct net_bridge *br = pg->port->br;
311 spin_lock(&br->multicast_lock);
312 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
313 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
316 br_multicast_del_pg(br, pg);
319 spin_unlock(&br->multicast_lock);
322 static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu **mdbp, int max,
325 struct net_bridge_mdb_htable *old = rcu_dereference_protected(*mdbp, 1);
326 struct net_bridge_mdb_htable *mdb;
329 mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC);
336 mdb->mhash = kcalloc(max, sizeof(*mdb->mhash), GFP_ATOMIC);
342 mdb->size = old ? old->size : 0;
343 mdb->ver = old ? old->ver ^ 1 : 0;
345 if (!old || elasticity)
346 get_random_bytes(&mdb->secret, sizeof(mdb->secret));
348 mdb->secret = old->secret;
353 err = br_mdb_copy(mdb, old, elasticity);
361 call_rcu_bh(&mdb->rcu, br_mdb_free);
364 rcu_assign_pointer(*mdbp, mdb);
369 static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
373 struct igmpv3_query *ihv3;
374 size_t igmp_hdr_size;
380 igmp_hdr_size = sizeof(*ih);
381 if (br->multicast_igmp_version == 3)
382 igmp_hdr_size = sizeof(*ihv3);
383 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
388 skb->protocol = htons(ETH_P_IP);
390 skb_reset_mac_header(skb);
393 ether_addr_copy(eth->h_source, br->dev->dev_addr);
396 eth->h_dest[2] = 0x5e;
400 eth->h_proto = htons(ETH_P_IP);
401 skb_put(skb, sizeof(*eth));
403 skb_set_network_header(skb, skb->len);
409 iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4);
411 iph->frag_off = htons(IP_DF);
413 iph->protocol = IPPROTO_IGMP;
414 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
415 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
416 iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
417 ((u8 *)&iph[1])[0] = IPOPT_RA;
418 ((u8 *)&iph[1])[1] = 4;
419 ((u8 *)&iph[1])[2] = 0;
420 ((u8 *)&iph[1])[3] = 0;
424 skb_set_transport_header(skb, skb->len);
425 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
427 switch (br->multicast_igmp_version) {
430 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
431 ih->code = (group ? br->multicast_last_member_interval :
432 br->multicast_query_response_interval) /
433 (HZ / IGMP_TIMER_SCALE);
436 ih->csum = ip_compute_csum((void *)ih, sizeof(*ih));
439 ihv3 = igmpv3_query_hdr(skb);
440 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
441 ihv3->code = (group ? br->multicast_last_member_interval :
442 br->multicast_query_response_interval) /
443 (HZ / IGMP_TIMER_SCALE);
445 ihv3->qqic = br->multicast_query_interval / HZ;
451 ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3));
455 skb_put(skb, igmp_hdr_size);
456 __skb_pull(skb, sizeof(*eth));
462 #if IS_ENABLED(CONFIG_IPV6)
463 static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
464 const struct in6_addr *grp,
467 struct mld2_query *mld2q;
468 unsigned long interval;
469 struct ipv6hdr *ip6h;
470 struct mld_msg *mldq;
476 mld_hdr_size = sizeof(*mldq);
477 if (br->multicast_mld_version == 2)
478 mld_hdr_size = sizeof(*mld2q);
479 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
484 skb->protocol = htons(ETH_P_IPV6);
486 /* Ethernet header */
487 skb_reset_mac_header(skb);
490 ether_addr_copy(eth->h_source, br->dev->dev_addr);
491 eth->h_proto = htons(ETH_P_IPV6);
492 skb_put(skb, sizeof(*eth));
494 /* IPv6 header + HbH option */
495 skb_set_network_header(skb, skb->len);
496 ip6h = ipv6_hdr(skb);
498 *(__force __be32 *)ip6h = htonl(0x60000000);
499 ip6h->payload_len = htons(8 + mld_hdr_size);
500 ip6h->nexthdr = IPPROTO_HOPOPTS;
502 ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
503 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
506 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
510 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
511 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
513 hopopt = (u8 *)(ip6h + 1);
514 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
515 hopopt[1] = 0; /* length of HbH */
516 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
517 hopopt[3] = 2; /* Length of RA Option */
518 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
520 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
521 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
523 skb_put(skb, sizeof(*ip6h) + 8);
526 skb_set_transport_header(skb, skb->len);
527 interval = ipv6_addr_any(grp) ?
528 br->multicast_query_response_interval :
529 br->multicast_last_member_interval;
530 *igmp_type = ICMPV6_MGM_QUERY;
531 switch (br->multicast_mld_version) {
533 mldq = (struct mld_msg *)icmp6_hdr(skb);
534 mldq->mld_type = ICMPV6_MGM_QUERY;
537 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
538 mldq->mld_reserved = 0;
539 mldq->mld_mca = *grp;
540 mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
541 sizeof(*mldq), IPPROTO_ICMPV6,
547 mld2q = (struct mld2_query *)icmp6_hdr(skb);
548 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
549 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
550 mld2q->mld2q_code = 0;
551 mld2q->mld2q_cksum = 0;
552 mld2q->mld2q_resv1 = 0;
553 mld2q->mld2q_resv2 = 0;
554 mld2q->mld2q_suppress = 0;
555 mld2q->mld2q_qrv = 2;
556 mld2q->mld2q_nsrcs = 0;
557 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
558 mld2q->mld2q_mca = *grp;
559 mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
567 skb_put(skb, mld_hdr_size);
569 __skb_pull(skb, sizeof(*eth));
576 static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
580 switch (addr->proto) {
581 case htons(ETH_P_IP):
582 return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type);
583 #if IS_ENABLED(CONFIG_IPV6)
584 case htons(ETH_P_IPV6):
585 return br_ip6_multicast_alloc_query(br, &addr->u.ip6,
592 static struct net_bridge_mdb_entry *br_multicast_get_group(
593 struct net_bridge *br, struct net_bridge_port *port,
594 struct br_ip *group, int hash)
596 struct net_bridge_mdb_htable *mdb;
597 struct net_bridge_mdb_entry *mp;
598 unsigned int count = 0;
603 mdb = rcu_dereference_protected(br->mdb, 1);
604 hlist_for_each_entry(mp, &mdb->mhash[hash], hlist[mdb->ver]) {
606 if (unlikely(br_ip_equal(group, &mp->addr)))
613 if (unlikely(count > br->hash_elasticity && count)) {
615 br_info(br, "Multicast hash table "
616 "chain limit reached: %s\n",
617 port ? port->dev->name : br->dev->name);
619 elasticity = br->hash_elasticity;
622 if (mdb->size >= max) {
624 if (unlikely(max > br->hash_max)) {
625 br_warn(br, "Multicast hash table maximum of %d "
626 "reached, disabling snooping: %s\n",
628 port ? port->dev->name : br->dev->name);
631 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
636 if (max > mdb->max || elasticity) {
639 br_info(br, "Multicast hash table "
641 port ? port->dev->name : br->dev->name);
646 err = br_mdb_rehash(&br->mdb, max, elasticity);
648 br_warn(br, "Cannot rehash multicast "
649 "hash table, disabling snooping: %s, %d, %d\n",
650 port ? port->dev->name : br->dev->name,
666 struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
667 struct net_bridge_port *p,
670 struct net_bridge_mdb_htable *mdb;
671 struct net_bridge_mdb_entry *mp;
675 mdb = rcu_dereference_protected(br->mdb, 1);
677 err = br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0);
683 hash = br_ip_hash(mdb, group);
684 mp = br_multicast_get_group(br, p, group, hash);
685 switch (PTR_ERR(mp)) {
691 mdb = rcu_dereference_protected(br->mdb, 1);
692 hash = br_ip_hash(mdb, group);
699 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
701 return ERR_PTR(-ENOMEM);
705 timer_setup(&mp->timer, br_multicast_group_expired, 0);
707 hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]);
714 struct net_bridge_port_group *br_multicast_new_port_group(
715 struct net_bridge_port *port,
717 struct net_bridge_port_group __rcu *next,
719 const unsigned char *src)
721 struct net_bridge_port_group *p;
723 p = kzalloc(sizeof(*p), GFP_ATOMIC);
730 rcu_assign_pointer(p->next, next);
731 hlist_add_head(&p->mglist, &port->mglist);
732 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
735 memcpy(p->eth_addr, src, ETH_ALEN);
737 memset(p->eth_addr, 0xff, ETH_ALEN);
742 static bool br_port_group_equal(struct net_bridge_port_group *p,
743 struct net_bridge_port *port,
744 const unsigned char *src)
749 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
752 return ether_addr_equal(src, p->eth_addr);
755 static int br_multicast_add_group(struct net_bridge *br,
756 struct net_bridge_port *port,
758 const unsigned char *src)
760 struct net_bridge_port_group __rcu **pp;
761 struct net_bridge_port_group *p;
762 struct net_bridge_mdb_entry *mp;
763 unsigned long now = jiffies;
766 spin_lock(&br->multicast_lock);
767 if (!netif_running(br->dev) ||
768 (port && port->state == BR_STATE_DISABLED))
771 mp = br_multicast_new_group(br, port, group);
777 if (!mp->host_joined) {
778 mp->host_joined = true;
779 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0);
781 mod_timer(&mp->timer, now + br->multicast_membership_interval);
785 for (pp = &mp->ports;
786 (p = mlock_dereference(*pp, br)) != NULL;
788 if (br_port_group_equal(p, port, src))
790 if ((unsigned long)p->port < (unsigned long)port)
794 p = br_multicast_new_port_group(port, group, *pp, 0, src);
797 rcu_assign_pointer(*pp, p);
798 br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0);
801 mod_timer(&p->timer, now + br->multicast_membership_interval);
806 spin_unlock(&br->multicast_lock);
810 static int br_ip4_multicast_add_group(struct net_bridge *br,
811 struct net_bridge_port *port,
814 const unsigned char *src)
816 struct br_ip br_group;
818 if (ipv4_is_local_multicast(group))
821 br_group.u.ip4 = group;
822 br_group.proto = htons(ETH_P_IP);
825 return br_multicast_add_group(br, port, &br_group, src);
828 #if IS_ENABLED(CONFIG_IPV6)
829 static int br_ip6_multicast_add_group(struct net_bridge *br,
830 struct net_bridge_port *port,
831 const struct in6_addr *group,
833 const unsigned char *src)
835 struct br_ip br_group;
837 if (ipv6_addr_is_ll_all_nodes(group))
840 br_group.u.ip6 = *group;
841 br_group.proto = htons(ETH_P_IPV6);
844 return br_multicast_add_group(br, port, &br_group, src);
848 static void br_multicast_router_expired(struct timer_list *t)
850 struct net_bridge_port *port =
851 from_timer(port, t, multicast_router_timer);
852 struct net_bridge *br = port->br;
854 spin_lock(&br->multicast_lock);
855 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
856 port->multicast_router == MDB_RTR_TYPE_PERM ||
857 timer_pending(&port->multicast_router_timer))
860 __del_port_router(port);
862 spin_unlock(&br->multicast_lock);
865 static void br_mc_router_state_change(struct net_bridge *p,
868 struct switchdev_attr attr = {
870 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
871 .flags = SWITCHDEV_F_DEFER,
872 .u.mrouter = is_mc_router,
875 switchdev_port_attr_set(p->dev, &attr);
878 static void br_multicast_local_router_expired(struct timer_list *t)
880 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
882 spin_lock(&br->multicast_lock);
883 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
884 br->multicast_router == MDB_RTR_TYPE_PERM ||
885 timer_pending(&br->multicast_router_timer))
888 br_mc_router_state_change(br, false);
890 spin_unlock(&br->multicast_lock);
893 static void br_multicast_querier_expired(struct net_bridge *br,
894 struct bridge_mcast_own_query *query)
896 spin_lock(&br->multicast_lock);
897 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
900 br_multicast_start_querier(br, query);
903 spin_unlock(&br->multicast_lock);
906 static void br_ip4_multicast_querier_expired(struct timer_list *t)
908 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
910 br_multicast_querier_expired(br, &br->ip4_own_query);
913 #if IS_ENABLED(CONFIG_IPV6)
914 static void br_ip6_multicast_querier_expired(struct timer_list *t)
916 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
918 br_multicast_querier_expired(br, &br->ip6_own_query);
922 static void br_multicast_select_own_querier(struct net_bridge *br,
926 if (ip->proto == htons(ETH_P_IP))
927 br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr;
928 #if IS_ENABLED(CONFIG_IPV6)
930 br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr;
934 static void __br_multicast_send_query(struct net_bridge *br,
935 struct net_bridge_port *port,
941 skb = br_multicast_alloc_query(br, ip, &igmp_type);
946 skb->dev = port->dev;
947 br_multicast_count(br, port, skb, igmp_type,
949 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
950 dev_net(port->dev), NULL, skb, NULL, skb->dev,
951 br_dev_queue_push_xmit);
953 br_multicast_select_own_querier(br, ip, skb);
954 br_multicast_count(br, port, skb, igmp_type,
960 static void br_multicast_send_query(struct net_bridge *br,
961 struct net_bridge_port *port,
962 struct bridge_mcast_own_query *own_query)
964 struct bridge_mcast_other_query *other_query = NULL;
965 struct br_ip br_group;
968 if (!netif_running(br->dev) ||
969 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
970 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
973 memset(&br_group.u, 0, sizeof(br_group.u));
975 if (port ? (own_query == &port->ip4_own_query) :
976 (own_query == &br->ip4_own_query)) {
977 other_query = &br->ip4_other_query;
978 br_group.proto = htons(ETH_P_IP);
979 #if IS_ENABLED(CONFIG_IPV6)
981 other_query = &br->ip6_other_query;
982 br_group.proto = htons(ETH_P_IPV6);
986 if (!other_query || timer_pending(&other_query->timer))
989 __br_multicast_send_query(br, port, &br_group);
992 time += own_query->startup_sent < br->multicast_startup_query_count ?
993 br->multicast_startup_query_interval :
994 br->multicast_query_interval;
995 mod_timer(&own_query->timer, time);
999 br_multicast_port_query_expired(struct net_bridge_port *port,
1000 struct bridge_mcast_own_query *query)
1002 struct net_bridge *br = port->br;
1004 spin_lock(&br->multicast_lock);
1005 if (port->state == BR_STATE_DISABLED ||
1006 port->state == BR_STATE_BLOCKING)
1009 if (query->startup_sent < br->multicast_startup_query_count)
1010 query->startup_sent++;
1012 br_multicast_send_query(port->br, port, query);
1015 spin_unlock(&br->multicast_lock);
1018 static void br_ip4_multicast_port_query_expired(struct timer_list *t)
1020 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
1022 br_multicast_port_query_expired(port, &port->ip4_own_query);
1025 #if IS_ENABLED(CONFIG_IPV6)
1026 static void br_ip6_multicast_port_query_expired(struct timer_list *t)
1028 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
1030 br_multicast_port_query_expired(port, &port->ip6_own_query);
1034 static void br_mc_disabled_update(struct net_device *dev, bool value)
1036 struct switchdev_attr attr = {
1038 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1039 .flags = SWITCHDEV_F_DEFER,
1040 .u.mc_disabled = !value,
1043 switchdev_port_attr_set(dev, &attr);
1046 int br_multicast_add_port(struct net_bridge_port *port)
1048 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1050 timer_setup(&port->multicast_router_timer,
1051 br_multicast_router_expired, 0);
1052 timer_setup(&port->ip4_own_query.timer,
1053 br_ip4_multicast_port_query_expired, 0);
1054 #if IS_ENABLED(CONFIG_IPV6)
1055 timer_setup(&port->ip6_own_query.timer,
1056 br_ip6_multicast_port_query_expired, 0);
1058 br_mc_disabled_update(port->dev,
1059 br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
1061 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
1062 if (!port->mcast_stats)
1068 void br_multicast_del_port(struct net_bridge_port *port)
1070 struct net_bridge *br = port->br;
1071 struct net_bridge_port_group *pg;
1072 struct hlist_node *n;
1074 /* Take care of the remaining groups, only perm ones should be left */
1075 spin_lock_bh(&br->multicast_lock);
1076 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
1077 br_multicast_del_pg(br, pg);
1078 spin_unlock_bh(&br->multicast_lock);
1079 del_timer_sync(&port->multicast_router_timer);
1080 free_percpu(port->mcast_stats);
1083 static void br_multicast_enable(struct bridge_mcast_own_query *query)
1085 query->startup_sent = 0;
1087 if (try_to_del_timer_sync(&query->timer) >= 0 ||
1088 del_timer(&query->timer))
1089 mod_timer(&query->timer, jiffies);
1092 static void __br_multicast_enable_port(struct net_bridge_port *port)
1094 struct net_bridge *br = port->br;
1096 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
1099 br_multicast_enable(&port->ip4_own_query);
1100 #if IS_ENABLED(CONFIG_IPV6)
1101 br_multicast_enable(&port->ip6_own_query);
1103 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
1104 hlist_unhashed(&port->rlist))
1105 br_multicast_add_router(br, port);
1108 void br_multicast_enable_port(struct net_bridge_port *port)
1110 struct net_bridge *br = port->br;
1112 spin_lock(&br->multicast_lock);
1113 __br_multicast_enable_port(port);
1114 spin_unlock(&br->multicast_lock);
1117 void br_multicast_disable_port(struct net_bridge_port *port)
1119 struct net_bridge *br = port->br;
1120 struct net_bridge_port_group *pg;
1121 struct hlist_node *n;
1123 spin_lock(&br->multicast_lock);
1124 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
1125 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
1126 br_multicast_del_pg(br, pg);
1128 __del_port_router(port);
1130 del_timer(&port->multicast_router_timer);
1131 del_timer(&port->ip4_own_query.timer);
1132 #if IS_ENABLED(CONFIG_IPV6)
1133 del_timer(&port->ip6_own_query.timer);
1135 spin_unlock(&br->multicast_lock);
1138 static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
1139 struct net_bridge_port *port,
1140 struct sk_buff *skb,
1143 const unsigned char *src;
1144 struct igmpv3_report *ih;
1145 struct igmpv3_grec *grec;
1153 ih = igmpv3_report_hdr(skb);
1154 num = ntohs(ih->ngrec);
1155 len = skb_transport_offset(skb) + sizeof(*ih);
1157 for (i = 0; i < num; i++) {
1158 len += sizeof(*grec);
1159 if (!pskb_may_pull(skb, len))
1162 grec = (void *)(skb->data + len - sizeof(*grec));
1163 group = grec->grec_mca;
1164 type = grec->grec_type;
1166 len += ntohs(grec->grec_nsrcs) * 4;
1167 if (!pskb_may_pull(skb, len))
1170 /* We treat this as an IGMPv2 report for now. */
1172 case IGMPV3_MODE_IS_INCLUDE:
1173 case IGMPV3_MODE_IS_EXCLUDE:
1174 case IGMPV3_CHANGE_TO_INCLUDE:
1175 case IGMPV3_CHANGE_TO_EXCLUDE:
1176 case IGMPV3_ALLOW_NEW_SOURCES:
1177 case IGMPV3_BLOCK_OLD_SOURCES:
1184 src = eth_hdr(skb)->h_source;
1185 if ((type == IGMPV3_CHANGE_TO_INCLUDE ||
1186 type == IGMPV3_MODE_IS_INCLUDE) &&
1187 ntohs(grec->grec_nsrcs) == 0) {
1188 br_ip4_multicast_leave_group(br, port, group, vid, src);
1190 err = br_ip4_multicast_add_group(br, port, group, vid,
1200 #if IS_ENABLED(CONFIG_IPV6)
1201 static int br_ip6_multicast_mld2_report(struct net_bridge *br,
1202 struct net_bridge_port *port,
1203 struct sk_buff *skb,
1206 const unsigned char *src;
1207 struct icmp6hdr *icmp6h;
1208 struct mld2_grec *grec;
1214 if (!pskb_may_pull(skb, sizeof(*icmp6h)))
1217 icmp6h = icmp6_hdr(skb);
1218 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
1219 len = skb_transport_offset(skb) + sizeof(*icmp6h);
1221 for (i = 0; i < num; i++) {
1222 __be16 *nsrcs, _nsrcs;
1224 nsrcs = skb_header_pointer(skb,
1225 len + offsetof(struct mld2_grec,
1227 sizeof(_nsrcs), &_nsrcs);
1231 if (!pskb_may_pull(skb,
1232 len + sizeof(*grec) +
1233 sizeof(struct in6_addr) * ntohs(*nsrcs)))
1236 grec = (struct mld2_grec *)(skb->data + len);
1237 len += sizeof(*grec) +
1238 sizeof(struct in6_addr) * ntohs(*nsrcs);
1240 /* We treat these as MLDv1 reports for now. */
1241 switch (grec->grec_type) {
1242 case MLD2_MODE_IS_INCLUDE:
1243 case MLD2_MODE_IS_EXCLUDE:
1244 case MLD2_CHANGE_TO_INCLUDE:
1245 case MLD2_CHANGE_TO_EXCLUDE:
1246 case MLD2_ALLOW_NEW_SOURCES:
1247 case MLD2_BLOCK_OLD_SOURCES:
1254 src = eth_hdr(skb)->h_source;
1255 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
1256 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
1257 ntohs(*nsrcs) == 0) {
1258 br_ip6_multicast_leave_group(br, port, &grec->grec_mca,
1261 err = br_ip6_multicast_add_group(br, port,
1262 &grec->grec_mca, vid,
1273 static bool br_ip4_multicast_select_querier(struct net_bridge *br,
1274 struct net_bridge_port *port,
1277 if (!timer_pending(&br->ip4_own_query.timer) &&
1278 !timer_pending(&br->ip4_other_query.timer))
1281 if (!br->ip4_querier.addr.u.ip4)
1284 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4))
1290 br->ip4_querier.addr.u.ip4 = saddr;
1292 /* update protected by general multicast_lock by caller */
1293 rcu_assign_pointer(br->ip4_querier.port, port);
1298 #if IS_ENABLED(CONFIG_IPV6)
1299 static bool br_ip6_multicast_select_querier(struct net_bridge *br,
1300 struct net_bridge_port *port,
1301 struct in6_addr *saddr)
1303 if (!timer_pending(&br->ip6_own_query.timer) &&
1304 !timer_pending(&br->ip6_other_query.timer))
1307 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0)
1313 br->ip6_querier.addr.u.ip6 = *saddr;
1315 /* update protected by general multicast_lock by caller */
1316 rcu_assign_pointer(br->ip6_querier.port, port);
1322 static bool br_multicast_select_querier(struct net_bridge *br,
1323 struct net_bridge_port *port,
1324 struct br_ip *saddr)
1326 switch (saddr->proto) {
1327 case htons(ETH_P_IP):
1328 return br_ip4_multicast_select_querier(br, port, saddr->u.ip4);
1329 #if IS_ENABLED(CONFIG_IPV6)
1330 case htons(ETH_P_IPV6):
1331 return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6);
1339 br_multicast_update_query_timer(struct net_bridge *br,
1340 struct bridge_mcast_other_query *query,
1341 unsigned long max_delay)
1343 if (!timer_pending(&query->timer))
1344 query->delay_time = jiffies + max_delay;
1346 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
1349 static void br_port_mc_router_state_change(struct net_bridge_port *p,
1352 struct switchdev_attr attr = {
1354 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
1355 .flags = SWITCHDEV_F_DEFER,
1356 .u.mrouter = is_mc_router,
1359 switchdev_port_attr_set(p->dev, &attr);
1363 * Add port to router_list
1364 * list is maintained ordered by pointer value
1365 * and locked by br->multicast_lock and RCU
1367 static void br_multicast_add_router(struct net_bridge *br,
1368 struct net_bridge_port *port)
1370 struct net_bridge_port *p;
1371 struct hlist_node *slot = NULL;
1373 if (!hlist_unhashed(&port->rlist))
1376 hlist_for_each_entry(p, &br->router_list, rlist) {
1377 if ((unsigned long) port >= (unsigned long) p)
1383 hlist_add_behind_rcu(&port->rlist, slot);
1385 hlist_add_head_rcu(&port->rlist, &br->router_list);
1386 br_rtr_notify(br->dev, port, RTM_NEWMDB);
1387 br_port_mc_router_state_change(port, true);
1390 static void br_multicast_mark_router(struct net_bridge *br,
1391 struct net_bridge_port *port)
1393 unsigned long now = jiffies;
1396 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
1397 if (!timer_pending(&br->multicast_router_timer))
1398 br_mc_router_state_change(br, true);
1399 mod_timer(&br->multicast_router_timer,
1400 now + br->multicast_querier_interval);
1405 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1406 port->multicast_router == MDB_RTR_TYPE_PERM)
1409 br_multicast_add_router(br, port);
1411 mod_timer(&port->multicast_router_timer,
1412 now + br->multicast_querier_interval);
1415 static void br_multicast_query_received(struct net_bridge *br,
1416 struct net_bridge_port *port,
1417 struct bridge_mcast_other_query *query,
1418 struct br_ip *saddr,
1419 unsigned long max_delay)
1421 if (!br_multicast_select_querier(br, port, saddr))
1424 br_multicast_update_query_timer(br, query, max_delay);
1425 br_multicast_mark_router(br, port);
1428 static void br_ip4_multicast_query(struct net_bridge *br,
1429 struct net_bridge_port *port,
1430 struct sk_buff *skb,
1433 const struct iphdr *iph = ip_hdr(skb);
1434 struct igmphdr *ih = igmp_hdr(skb);
1435 struct net_bridge_mdb_entry *mp;
1436 struct igmpv3_query *ih3;
1437 struct net_bridge_port_group *p;
1438 struct net_bridge_port_group __rcu **pp;
1440 unsigned long max_delay;
1441 unsigned long now = jiffies;
1442 unsigned int offset = skb_transport_offset(skb);
1445 spin_lock(&br->multicast_lock);
1446 if (!netif_running(br->dev) ||
1447 (port && port->state == BR_STATE_DISABLED))
1452 if (skb->len == offset + sizeof(*ih)) {
1453 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
1456 max_delay = 10 * HZ;
1459 } else if (skb->len >= offset + sizeof(*ih3)) {
1460 ih3 = igmpv3_query_hdr(skb);
1464 max_delay = ih3->code ?
1465 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
1471 saddr.proto = htons(ETH_P_IP);
1472 saddr.u.ip4 = iph->saddr;
1474 br_multicast_query_received(br, port, &br->ip4_other_query,
1479 mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group, vid);
1483 max_delay *= br->multicast_last_member_count;
1485 if (mp->host_joined &&
1486 (timer_pending(&mp->timer) ?
1487 time_after(mp->timer.expires, now + max_delay) :
1488 try_to_del_timer_sync(&mp->timer) >= 0))
1489 mod_timer(&mp->timer, now + max_delay);
1491 for (pp = &mp->ports;
1492 (p = mlock_dereference(*pp, br)) != NULL;
1494 if (timer_pending(&p->timer) ?
1495 time_after(p->timer.expires, now + max_delay) :
1496 try_to_del_timer_sync(&p->timer) >= 0)
1497 mod_timer(&p->timer, now + max_delay);
1501 spin_unlock(&br->multicast_lock);
1504 #if IS_ENABLED(CONFIG_IPV6)
1505 static int br_ip6_multicast_query(struct net_bridge *br,
1506 struct net_bridge_port *port,
1507 struct sk_buff *skb,
1510 const struct ipv6hdr *ip6h = ipv6_hdr(skb);
1511 struct mld_msg *mld;
1512 struct net_bridge_mdb_entry *mp;
1513 struct mld2_query *mld2q;
1514 struct net_bridge_port_group *p;
1515 struct net_bridge_port_group __rcu **pp;
1517 unsigned long max_delay;
1518 unsigned long now = jiffies;
1519 unsigned int offset = skb_transport_offset(skb);
1520 const struct in6_addr *group = NULL;
1521 bool is_general_query;
1524 spin_lock(&br->multicast_lock);
1525 if (!netif_running(br->dev) ||
1526 (port && port->state == BR_STATE_DISABLED))
1529 if (skb->len == offset + sizeof(*mld)) {
1530 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
1534 mld = (struct mld_msg *) icmp6_hdr(skb);
1535 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
1537 group = &mld->mld_mca;
1539 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
1543 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1544 if (!mld2q->mld2q_nsrcs)
1545 group = &mld2q->mld2q_mca;
1547 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
1550 is_general_query = group && ipv6_addr_any(group);
1552 if (is_general_query) {
1553 saddr.proto = htons(ETH_P_IPV6);
1554 saddr.u.ip6 = ip6h->saddr;
1556 br_multicast_query_received(br, port, &br->ip6_other_query,
1559 } else if (!group) {
1563 mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group, vid);
1567 max_delay *= br->multicast_last_member_count;
1568 if (mp->host_joined &&
1569 (timer_pending(&mp->timer) ?
1570 time_after(mp->timer.expires, now + max_delay) :
1571 try_to_del_timer_sync(&mp->timer) >= 0))
1572 mod_timer(&mp->timer, now + max_delay);
1574 for (pp = &mp->ports;
1575 (p = mlock_dereference(*pp, br)) != NULL;
1577 if (timer_pending(&p->timer) ?
1578 time_after(p->timer.expires, now + max_delay) :
1579 try_to_del_timer_sync(&p->timer) >= 0)
1580 mod_timer(&p->timer, now + max_delay);
1584 spin_unlock(&br->multicast_lock);
1590 br_multicast_leave_group(struct net_bridge *br,
1591 struct net_bridge_port *port,
1592 struct br_ip *group,
1593 struct bridge_mcast_other_query *other_query,
1594 struct bridge_mcast_own_query *own_query,
1595 const unsigned char *src)
1597 struct net_bridge_mdb_htable *mdb;
1598 struct net_bridge_mdb_entry *mp;
1599 struct net_bridge_port_group *p;
1603 spin_lock(&br->multicast_lock);
1604 if (!netif_running(br->dev) ||
1605 (port && port->state == BR_STATE_DISABLED))
1608 mdb = mlock_dereference(br->mdb, br);
1609 mp = br_mdb_ip_get(mdb, group);
1613 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
1614 struct net_bridge_port_group __rcu **pp;
1616 for (pp = &mp->ports;
1617 (p = mlock_dereference(*pp, br)) != NULL;
1619 if (!br_port_group_equal(p, port, src))
1622 rcu_assign_pointer(*pp, p->next);
1623 hlist_del_init(&p->mglist);
1624 del_timer(&p->timer);
1625 call_rcu_bh(&p->rcu, br_multicast_free_pg);
1626 br_mdb_notify(br->dev, port, group, RTM_DELMDB,
1629 if (!mp->ports && !mp->host_joined &&
1630 netif_running(br->dev))
1631 mod_timer(&mp->timer, jiffies);
1636 if (timer_pending(&other_query->timer))
1639 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
1640 __br_multicast_send_query(br, port, &mp->addr);
1642 time = jiffies + br->multicast_last_member_count *
1643 br->multicast_last_member_interval;
1645 mod_timer(&own_query->timer, time);
1647 for (p = mlock_dereference(mp->ports, br);
1649 p = mlock_dereference(p->next, br)) {
1650 if (!br_port_group_equal(p, port, src))
1653 if (!hlist_unhashed(&p->mglist) &&
1654 (timer_pending(&p->timer) ?
1655 time_after(p->timer.expires, time) :
1656 try_to_del_timer_sync(&p->timer) >= 0)) {
1657 mod_timer(&p->timer, time);
1665 time = now + br->multicast_last_member_count *
1666 br->multicast_last_member_interval;
1669 if (mp->host_joined &&
1670 (timer_pending(&mp->timer) ?
1671 time_after(mp->timer.expires, time) :
1672 try_to_del_timer_sync(&mp->timer) >= 0)) {
1673 mod_timer(&mp->timer, time);
1679 for (p = mlock_dereference(mp->ports, br);
1681 p = mlock_dereference(p->next, br)) {
1682 if (p->port != port)
1685 if (!hlist_unhashed(&p->mglist) &&
1686 (timer_pending(&p->timer) ?
1687 time_after(p->timer.expires, time) :
1688 try_to_del_timer_sync(&p->timer) >= 0)) {
1689 mod_timer(&p->timer, time);
1695 spin_unlock(&br->multicast_lock);
1698 static void br_ip4_multicast_leave_group(struct net_bridge *br,
1699 struct net_bridge_port *port,
1702 const unsigned char *src)
1704 struct br_ip br_group;
1705 struct bridge_mcast_own_query *own_query;
1707 if (ipv4_is_local_multicast(group))
1710 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
1712 br_group.u.ip4 = group;
1713 br_group.proto = htons(ETH_P_IP);
1716 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
1720 #if IS_ENABLED(CONFIG_IPV6)
1721 static void br_ip6_multicast_leave_group(struct net_bridge *br,
1722 struct net_bridge_port *port,
1723 const struct in6_addr *group,
1725 const unsigned char *src)
1727 struct br_ip br_group;
1728 struct bridge_mcast_own_query *own_query;
1730 if (ipv6_addr_is_ll_all_nodes(group))
1733 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
1735 br_group.u.ip6 = *group;
1736 br_group.proto = htons(ETH_P_IPV6);
1739 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
1744 static void br_multicast_err_count(const struct net_bridge *br,
1745 const struct net_bridge_port *p,
1748 struct bridge_mcast_stats __percpu *stats;
1749 struct bridge_mcast_stats *pstats;
1751 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1755 stats = p->mcast_stats;
1757 stats = br->mcast_stats;
1758 if (WARN_ON(!stats))
1761 pstats = this_cpu_ptr(stats);
1763 u64_stats_update_begin(&pstats->syncp);
1765 case htons(ETH_P_IP):
1766 pstats->mstats.igmp_parse_errors++;
1768 #if IS_ENABLED(CONFIG_IPV6)
1769 case htons(ETH_P_IPV6):
1770 pstats->mstats.mld_parse_errors++;
1774 u64_stats_update_end(&pstats->syncp);
1777 static void br_multicast_pim(struct net_bridge *br,
1778 struct net_bridge_port *port,
1779 const struct sk_buff *skb)
1781 unsigned int offset = skb_transport_offset(skb);
1782 struct pimhdr *pimhdr, _pimhdr;
1784 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
1785 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
1786 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
1789 br_multicast_mark_router(br, port);
1792 static int br_multicast_ipv4_rcv(struct net_bridge *br,
1793 struct net_bridge_port *port,
1794 struct sk_buff *skb,
1797 struct sk_buff *skb_trimmed = NULL;
1798 const unsigned char *src;
1802 err = ip_mc_check_igmp(skb, &skb_trimmed);
1804 if (err == -ENOMSG) {
1805 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
1806 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
1807 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
1808 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
1809 br_multicast_pim(br, port, skb);
1812 } else if (err < 0) {
1813 br_multicast_err_count(br, port, skb->protocol);
1818 src = eth_hdr(skb)->h_source;
1819 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
1822 case IGMP_HOST_MEMBERSHIP_REPORT:
1823 case IGMPV2_HOST_MEMBERSHIP_REPORT:
1824 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
1825 err = br_ip4_multicast_add_group(br, port, ih->group, vid, src);
1827 case IGMPV3_HOST_MEMBERSHIP_REPORT:
1828 err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid);
1830 case IGMP_HOST_MEMBERSHIP_QUERY:
1831 br_ip4_multicast_query(br, port, skb_trimmed, vid);
1833 case IGMP_HOST_LEAVE_MESSAGE:
1834 br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
1838 if (skb_trimmed && skb_trimmed != skb)
1839 kfree_skb(skb_trimmed);
1841 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1847 #if IS_ENABLED(CONFIG_IPV6)
1848 static int br_multicast_ipv6_rcv(struct net_bridge *br,
1849 struct net_bridge_port *port,
1850 struct sk_buff *skb,
1853 struct sk_buff *skb_trimmed = NULL;
1854 const unsigned char *src;
1855 struct mld_msg *mld;
1858 err = ipv6_mc_check_mld(skb, &skb_trimmed);
1860 if (err == -ENOMSG) {
1861 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
1862 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
1864 } else if (err < 0) {
1865 br_multicast_err_count(br, port, skb->protocol);
1869 mld = (struct mld_msg *)skb_transport_header(skb);
1870 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
1872 switch (mld->mld_type) {
1873 case ICMPV6_MGM_REPORT:
1874 src = eth_hdr(skb)->h_source;
1875 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
1876 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
1879 case ICMPV6_MLD2_REPORT:
1880 err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid);
1882 case ICMPV6_MGM_QUERY:
1883 err = br_ip6_multicast_query(br, port, skb_trimmed, vid);
1885 case ICMPV6_MGM_REDUCTION:
1886 src = eth_hdr(skb)->h_source;
1887 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
1891 if (skb_trimmed && skb_trimmed != skb)
1892 kfree_skb(skb_trimmed);
1894 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1901 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
1902 struct sk_buff *skb, u16 vid)
1906 BR_INPUT_SKB_CB(skb)->igmp = 0;
1907 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
1909 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
1912 switch (skb->protocol) {
1913 case htons(ETH_P_IP):
1914 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
1916 #if IS_ENABLED(CONFIG_IPV6)
1917 case htons(ETH_P_IPV6):
1918 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
1926 static void br_multicast_query_expired(struct net_bridge *br,
1927 struct bridge_mcast_own_query *query,
1928 struct bridge_mcast_querier *querier)
1930 spin_lock(&br->multicast_lock);
1931 if (query->startup_sent < br->multicast_startup_query_count)
1932 query->startup_sent++;
1934 RCU_INIT_POINTER(querier->port, NULL);
1935 br_multicast_send_query(br, NULL, query);
1936 spin_unlock(&br->multicast_lock);
1939 static void br_ip4_multicast_query_expired(struct timer_list *t)
1941 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
1943 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
1946 #if IS_ENABLED(CONFIG_IPV6)
1947 static void br_ip6_multicast_query_expired(struct timer_list *t)
1949 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
1951 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
1955 void br_multicast_init(struct net_bridge *br)
1957 br->hash_elasticity = 4;
1960 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1961 br->multicast_last_member_count = 2;
1962 br->multicast_startup_query_count = 2;
1964 br->multicast_last_member_interval = HZ;
1965 br->multicast_query_response_interval = 10 * HZ;
1966 br->multicast_startup_query_interval = 125 * HZ / 4;
1967 br->multicast_query_interval = 125 * HZ;
1968 br->multicast_querier_interval = 255 * HZ;
1969 br->multicast_membership_interval = 260 * HZ;
1971 br->ip4_other_query.delay_time = 0;
1972 br->ip4_querier.port = NULL;
1973 br->multicast_igmp_version = 2;
1974 #if IS_ENABLED(CONFIG_IPV6)
1975 br->multicast_mld_version = 1;
1976 br->ip6_other_query.delay_time = 0;
1977 br->ip6_querier.port = NULL;
1979 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
1980 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
1982 spin_lock_init(&br->multicast_lock);
1983 timer_setup(&br->multicast_router_timer,
1984 br_multicast_local_router_expired, 0);
1985 timer_setup(&br->ip4_other_query.timer,
1986 br_ip4_multicast_querier_expired, 0);
1987 timer_setup(&br->ip4_own_query.timer,
1988 br_ip4_multicast_query_expired, 0);
1989 #if IS_ENABLED(CONFIG_IPV6)
1990 timer_setup(&br->ip6_other_query.timer,
1991 br_ip6_multicast_querier_expired, 0);
1992 timer_setup(&br->ip6_own_query.timer,
1993 br_ip6_multicast_query_expired, 0);
1997 static void __br_multicast_open(struct net_bridge *br,
1998 struct bridge_mcast_own_query *query)
2000 query->startup_sent = 0;
2002 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
2005 mod_timer(&query->timer, jiffies);
2008 void br_multicast_open(struct net_bridge *br)
2010 __br_multicast_open(br, &br->ip4_own_query);
2011 #if IS_ENABLED(CONFIG_IPV6)
2012 __br_multicast_open(br, &br->ip6_own_query);
2016 void br_multicast_stop(struct net_bridge *br)
2018 del_timer_sync(&br->multicast_router_timer);
2019 del_timer_sync(&br->ip4_other_query.timer);
2020 del_timer_sync(&br->ip4_own_query.timer);
2021 #if IS_ENABLED(CONFIG_IPV6)
2022 del_timer_sync(&br->ip6_other_query.timer);
2023 del_timer_sync(&br->ip6_own_query.timer);
2027 void br_multicast_dev_del(struct net_bridge *br)
2029 struct net_bridge_mdb_htable *mdb;
2030 struct net_bridge_mdb_entry *mp;
2031 struct hlist_node *n;
2035 spin_lock_bh(&br->multicast_lock);
2036 mdb = mlock_dereference(br->mdb, br);
2043 for (i = 0; i < mdb->max; i++) {
2044 hlist_for_each_entry_safe(mp, n, &mdb->mhash[i],
2046 del_timer(&mp->timer);
2047 call_rcu_bh(&mp->rcu, br_multicast_free_group);
2052 spin_unlock_bh(&br->multicast_lock);
2054 spin_lock_bh(&br->multicast_lock);
2059 call_rcu_bh(&mdb->rcu, br_mdb_free);
2062 spin_unlock_bh(&br->multicast_lock);
2065 int br_multicast_set_router(struct net_bridge *br, unsigned long val)
2069 spin_lock_bh(&br->multicast_lock);
2072 case MDB_RTR_TYPE_DISABLED:
2073 case MDB_RTR_TYPE_PERM:
2074 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
2075 del_timer(&br->multicast_router_timer);
2076 br->multicast_router = val;
2079 case MDB_RTR_TYPE_TEMP_QUERY:
2080 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
2081 br_mc_router_state_change(br, false);
2082 br->multicast_router = val;
2087 spin_unlock_bh(&br->multicast_lock);
2092 static void __del_port_router(struct net_bridge_port *p)
2094 if (hlist_unhashed(&p->rlist))
2096 hlist_del_init_rcu(&p->rlist);
2097 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
2098 br_port_mc_router_state_change(p, false);
2100 /* don't allow timer refresh */
2101 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
2102 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
2105 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
2107 struct net_bridge *br = p->br;
2108 unsigned long now = jiffies;
2111 spin_lock(&br->multicast_lock);
2112 if (p->multicast_router == val) {
2113 /* Refresh the temp router port timer */
2114 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
2115 mod_timer(&p->multicast_router_timer,
2116 now + br->multicast_querier_interval);
2121 case MDB_RTR_TYPE_DISABLED:
2122 p->multicast_router = MDB_RTR_TYPE_DISABLED;
2123 __del_port_router(p);
2124 del_timer(&p->multicast_router_timer);
2126 case MDB_RTR_TYPE_TEMP_QUERY:
2127 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
2128 __del_port_router(p);
2130 case MDB_RTR_TYPE_PERM:
2131 p->multicast_router = MDB_RTR_TYPE_PERM;
2132 del_timer(&p->multicast_router_timer);
2133 br_multicast_add_router(br, p);
2135 case MDB_RTR_TYPE_TEMP:
2136 p->multicast_router = MDB_RTR_TYPE_TEMP;
2137 br_multicast_mark_router(br, p);
2144 spin_unlock(&br->multicast_lock);
2149 static void br_multicast_start_querier(struct net_bridge *br,
2150 struct bridge_mcast_own_query *query)
2152 struct net_bridge_port *port;
2154 __br_multicast_open(br, query);
2156 list_for_each_entry(port, &br->port_list, list) {
2157 if (port->state == BR_STATE_DISABLED ||
2158 port->state == BR_STATE_BLOCKING)
2161 if (query == &br->ip4_own_query)
2162 br_multicast_enable(&port->ip4_own_query);
2163 #if IS_ENABLED(CONFIG_IPV6)
2165 br_multicast_enable(&port->ip6_own_query);
2170 int br_multicast_toggle(struct net_bridge *br, unsigned long val)
2172 struct net_bridge_mdb_htable *mdb;
2173 struct net_bridge_port *port;
2176 spin_lock_bh(&br->multicast_lock);
2177 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
2180 br_mc_disabled_update(br->dev, val);
2181 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
2182 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
2185 if (!netif_running(br->dev))
2188 mdb = mlock_dereference(br->mdb, br);
2193 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
2197 err = br_mdb_rehash(&br->mdb, mdb->max,
2198 br->hash_elasticity);
2203 br_multicast_open(br);
2204 list_for_each_entry(port, &br->port_list, list)
2205 __br_multicast_enable_port(port);
2208 spin_unlock_bh(&br->multicast_lock);
2213 bool br_multicast_enabled(const struct net_device *dev)
2215 struct net_bridge *br = netdev_priv(dev);
2217 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
2219 EXPORT_SYMBOL_GPL(br_multicast_enabled);
2221 bool br_multicast_router(const struct net_device *dev)
2223 struct net_bridge *br = netdev_priv(dev);
2226 spin_lock_bh(&br->multicast_lock);
2227 is_router = br_multicast_is_router(br);
2228 spin_unlock_bh(&br->multicast_lock);
2231 EXPORT_SYMBOL_GPL(br_multicast_router);
2233 int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
2235 unsigned long max_delay;
2239 spin_lock_bh(&br->multicast_lock);
2240 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
2243 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
2247 max_delay = br->multicast_query_response_interval;
2249 if (!timer_pending(&br->ip4_other_query.timer))
2250 br->ip4_other_query.delay_time = jiffies + max_delay;
2252 br_multicast_start_querier(br, &br->ip4_own_query);
2254 #if IS_ENABLED(CONFIG_IPV6)
2255 if (!timer_pending(&br->ip6_other_query.timer))
2256 br->ip6_other_query.delay_time = jiffies + max_delay;
2258 br_multicast_start_querier(br, &br->ip6_own_query);
2262 spin_unlock_bh(&br->multicast_lock);
2267 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val)
2271 struct net_bridge_mdb_htable *mdb;
2273 spin_lock_bh(&br->multicast_lock);
2274 if (!is_power_of_2(val))
2277 mdb = mlock_dereference(br->mdb, br);
2278 if (mdb && val < mdb->size)
2294 err = br_mdb_rehash(&br->mdb, br->hash_max,
2295 br->hash_elasticity);
2301 spin_unlock_bh(&br->multicast_lock);
2306 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
2308 /* Currently we support only version 2 and 3 */
2317 spin_lock_bh(&br->multicast_lock);
2318 br->multicast_igmp_version = val;
2319 spin_unlock_bh(&br->multicast_lock);
2324 #if IS_ENABLED(CONFIG_IPV6)
2325 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
2327 /* Currently we support version 1 and 2 */
2336 spin_lock_bh(&br->multicast_lock);
2337 br->multicast_mld_version = val;
2338 spin_unlock_bh(&br->multicast_lock);
2345 * br_multicast_list_adjacent - Returns snooped multicast addresses
2346 * @dev: The bridge port adjacent to which to retrieve addresses
2347 * @br_ip_list: The list to store found, snooped multicast IP addresses in
2349 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
2350 * snooping feature on all bridge ports of dev's bridge device, excluding
2351 * the addresses from dev itself.
2353 * Returns the number of items added to br_ip_list.
2356 * - br_ip_list needs to be initialized by caller
2357 * - br_ip_list might contain duplicates in the end
2358 * (needs to be taken care of by caller)
2359 * - br_ip_list needs to be freed by caller
2361 int br_multicast_list_adjacent(struct net_device *dev,
2362 struct list_head *br_ip_list)
2364 struct net_bridge *br;
2365 struct net_bridge_port *port;
2366 struct net_bridge_port_group *group;
2367 struct br_ip_list *entry;
2371 if (!br_ip_list || !br_port_exists(dev))
2374 port = br_port_get_rcu(dev);
2375 if (!port || !port->br)
2380 list_for_each_entry_rcu(port, &br->port_list, list) {
2381 if (!port->dev || port->dev == dev)
2384 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
2385 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
2389 entry->addr = group->addr;
2390 list_add(&entry->list, br_ip_list);
2399 EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2402 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
2403 * @dev: The bridge port providing the bridge on which to check for a querier
2404 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2406 * Checks whether the given interface has a bridge on top and if so returns
2407 * true if a valid querier exists anywhere on the bridged link layer.
2408 * Otherwise returns false.
2410 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
2412 struct net_bridge *br;
2413 struct net_bridge_port *port;
2418 if (!br_port_exists(dev))
2421 port = br_port_get_rcu(dev);
2422 if (!port || !port->br)
2427 memset(ð, 0, sizeof(eth));
2428 eth.h_proto = htons(proto);
2430 ret = br_multicast_querier_exists(br, ð);
2436 EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
2439 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
2440 * @dev: The bridge port adjacent to which to check for a querier
2441 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2443 * Checks whether the given interface has a bridge on top and if so returns
2444 * true if a selected querier is behind one of the other ports of this
2445 * bridge. Otherwise returns false.
2447 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
2449 struct net_bridge *br;
2450 struct net_bridge_port *port;
2454 if (!br_port_exists(dev))
2457 port = br_port_get_rcu(dev);
2458 if (!port || !port->br)
2465 if (!timer_pending(&br->ip4_other_query.timer) ||
2466 rcu_dereference(br->ip4_querier.port) == port)
2469 #if IS_ENABLED(CONFIG_IPV6)
2471 if (!timer_pending(&br->ip6_other_query.timer) ||
2472 rcu_dereference(br->ip6_querier.port) == port)
2485 EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
2487 static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
2488 const struct sk_buff *skb, u8 type, u8 dir)
2490 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
2491 __be16 proto = skb->protocol;
2494 u64_stats_update_begin(&pstats->syncp);
2496 case htons(ETH_P_IP):
2497 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
2499 case IGMP_HOST_MEMBERSHIP_REPORT:
2500 pstats->mstats.igmp_v1reports[dir]++;
2502 case IGMPV2_HOST_MEMBERSHIP_REPORT:
2503 pstats->mstats.igmp_v2reports[dir]++;
2505 case IGMPV3_HOST_MEMBERSHIP_REPORT:
2506 pstats->mstats.igmp_v3reports[dir]++;
2508 case IGMP_HOST_MEMBERSHIP_QUERY:
2509 if (t_len != sizeof(struct igmphdr)) {
2510 pstats->mstats.igmp_v3queries[dir]++;
2512 unsigned int offset = skb_transport_offset(skb);
2513 struct igmphdr *ih, _ihdr;
2515 ih = skb_header_pointer(skb, offset,
2516 sizeof(_ihdr), &_ihdr);
2520 pstats->mstats.igmp_v1queries[dir]++;
2522 pstats->mstats.igmp_v2queries[dir]++;
2525 case IGMP_HOST_LEAVE_MESSAGE:
2526 pstats->mstats.igmp_leaves[dir]++;
2530 #if IS_ENABLED(CONFIG_IPV6)
2531 case htons(ETH_P_IPV6):
2532 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
2533 sizeof(struct ipv6hdr);
2534 t_len -= skb_network_header_len(skb);
2536 case ICMPV6_MGM_REPORT:
2537 pstats->mstats.mld_v1reports[dir]++;
2539 case ICMPV6_MLD2_REPORT:
2540 pstats->mstats.mld_v2reports[dir]++;
2542 case ICMPV6_MGM_QUERY:
2543 if (t_len != sizeof(struct mld_msg))
2544 pstats->mstats.mld_v2queries[dir]++;
2546 pstats->mstats.mld_v1queries[dir]++;
2548 case ICMPV6_MGM_REDUCTION:
2549 pstats->mstats.mld_leaves[dir]++;
2553 #endif /* CONFIG_IPV6 */
2555 u64_stats_update_end(&pstats->syncp);
2558 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
2559 const struct sk_buff *skb, u8 type, u8 dir)
2561 struct bridge_mcast_stats __percpu *stats;
2563 /* if multicast_disabled is true then igmp type can't be set */
2564 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
2568 stats = p->mcast_stats;
2570 stats = br->mcast_stats;
2571 if (WARN_ON(!stats))
2574 br_mcast_stats_add(stats, skb, type, dir);
2577 int br_multicast_init_stats(struct net_bridge *br)
2579 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2580 if (!br->mcast_stats)
2586 void br_multicast_uninit_stats(struct net_bridge *br)
2588 free_percpu(br->mcast_stats);
2591 static void mcast_stats_add_dir(u64 *dst, u64 *src)
2593 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
2594 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
2597 void br_multicast_get_stats(const struct net_bridge *br,
2598 const struct net_bridge_port *p,
2599 struct br_mcast_stats *dest)
2601 struct bridge_mcast_stats __percpu *stats;
2602 struct br_mcast_stats tdst;
2605 memset(dest, 0, sizeof(*dest));
2607 stats = p->mcast_stats;
2609 stats = br->mcast_stats;
2610 if (WARN_ON(!stats))
2613 memset(&tdst, 0, sizeof(tdst));
2614 for_each_possible_cpu(i) {
2615 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
2616 struct br_mcast_stats temp;
2620 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
2621 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
2622 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
2624 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
2625 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
2626 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
2627 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
2628 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
2629 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
2630 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
2631 tdst.igmp_parse_errors += temp.igmp_parse_errors;
2633 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
2634 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
2635 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
2636 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
2637 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
2638 tdst.mld_parse_errors += temp.mld_parse_errors;
2640 memcpy(dest, &tdst, sizeof(*dest));