1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Bridge multicast support.
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
9 #include <linux/export.h>
10 #include <linux/if_ether.h>
11 #include <linux/igmp.h>
13 #include <linux/jhash.h>
14 #include <linux/kernel.h>
15 #include <linux/log2.h>
16 #include <linux/netdevice.h>
17 #include <linux/netfilter_bridge.h>
18 #include <linux/random.h>
19 #include <linux/rculist.h>
20 #include <linux/skbuff.h>
21 #include <linux/slab.h>
22 #include <linux/timer.h>
23 #include <linux/inetdevice.h>
24 #include <linux/mroute.h>
26 #include <net/switchdev.h>
27 #if IS_ENABLED(CONFIG_IPV6)
28 #include <linux/icmpv6.h>
31 #include <net/ip6_checksum.h>
32 #include <net/addrconf.h>
35 #include "br_private.h"
36 #include "br_private_mcast_eht.h"
38 static const struct rhashtable_params br_mdb_rht_params = {
39 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
40 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
41 .key_len = sizeof(struct br_ip),
42 .automatic_shrinking = true,
45 static const struct rhashtable_params br_sg_port_rht_params = {
46 .head_offset = offsetof(struct net_bridge_port_group, rhnode),
47 .key_offset = offsetof(struct net_bridge_port_group, key),
48 .key_len = sizeof(struct net_bridge_port_group_sg_key),
49 .automatic_shrinking = true,
52 static void br_multicast_start_querier(struct net_bridge *br,
53 struct bridge_mcast_own_query *query);
54 static void br_multicast_add_router(struct net_bridge *br,
55 struct net_bridge_port *port);
56 static void br_ip4_multicast_leave_group(struct net_bridge *br,
57 struct net_bridge_port *port,
60 const unsigned char *src);
61 static void br_multicast_port_group_rexmit(struct timer_list *t);
63 static void __del_port_router(struct net_bridge_port *p);
64 #if IS_ENABLED(CONFIG_IPV6)
65 static void br_ip6_multicast_leave_group(struct net_bridge *br,
66 struct net_bridge_port *port,
67 const struct in6_addr *group,
68 __u16 vid, const unsigned char *src);
70 static struct net_bridge_port_group *
71 __br_multicast_add_group(struct net_bridge *br,
72 struct net_bridge_port *port,
74 const unsigned char *src,
78 static void br_multicast_find_del_pg(struct net_bridge *br,
79 struct net_bridge_port_group *pg);
81 static struct net_bridge_port_group *
82 br_sg_port_find(struct net_bridge *br,
83 struct net_bridge_port_group_sg_key *sg_p)
85 lockdep_assert_held_once(&br->multicast_lock);
87 return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
88 br_sg_port_rht_params);
91 static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
94 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
97 struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
100 struct net_bridge_mdb_entry *ent;
102 lockdep_assert_held_once(&br->multicast_lock);
105 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
111 static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
112 __be32 dst, __u16 vid)
116 memset(&br_dst, 0, sizeof(br_dst));
117 br_dst.dst.ip4 = dst;
118 br_dst.proto = htons(ETH_P_IP);
121 return br_mdb_ip_get(br, &br_dst);
124 #if IS_ENABLED(CONFIG_IPV6)
125 static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
126 const struct in6_addr *dst,
131 memset(&br_dst, 0, sizeof(br_dst));
132 br_dst.dst.ip6 = *dst;
133 br_dst.proto = htons(ETH_P_IPV6);
136 return br_mdb_ip_get(br, &br_dst);
140 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
141 struct sk_buff *skb, u16 vid)
145 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
148 if (BR_INPUT_SKB_CB(skb)->igmp)
151 memset(&ip, 0, sizeof(ip));
152 ip.proto = skb->protocol;
155 switch (skb->protocol) {
156 case htons(ETH_P_IP):
157 ip.dst.ip4 = ip_hdr(skb)->daddr;
158 if (br->multicast_igmp_version == 3) {
159 struct net_bridge_mdb_entry *mdb;
161 ip.src.ip4 = ip_hdr(skb)->saddr;
162 mdb = br_mdb_ip_get_rcu(br, &ip);
168 #if IS_ENABLED(CONFIG_IPV6)
169 case htons(ETH_P_IPV6):
170 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
171 if (br->multicast_mld_version == 2) {
172 struct net_bridge_mdb_entry *mdb;
174 ip.src.ip6 = ipv6_hdr(skb)->saddr;
175 mdb = br_mdb_ip_get_rcu(br, &ip);
178 memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
184 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
187 return br_mdb_ip_get_rcu(br, &ip);
190 static bool br_port_group_equal(struct net_bridge_port_group *p,
191 struct net_bridge_port *port,
192 const unsigned char *src)
194 if (p->key.port != port)
197 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
200 return ether_addr_equal(src, p->eth_addr);
203 static void __fwd_add_star_excl(struct net_bridge_port_group *pg,
206 struct net_bridge_port_group_sg_key sg_key;
207 struct net_bridge *br = pg->key.port->br;
208 struct net_bridge_port_group *src_pg;
210 memset(&sg_key, 0, sizeof(sg_key));
211 sg_key.port = pg->key.port;
212 sg_key.addr = *sg_ip;
213 if (br_sg_port_find(br, &sg_key))
216 src_pg = __br_multicast_add_group(br, pg->key.port, sg_ip, pg->eth_addr,
217 MCAST_INCLUDE, false, false);
218 if (IS_ERR_OR_NULL(src_pg) ||
219 src_pg->rt_protocol != RTPROT_KERNEL)
222 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
225 static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
228 struct net_bridge_port_group_sg_key sg_key;
229 struct net_bridge *br = pg->key.port->br;
230 struct net_bridge_port_group *src_pg;
232 memset(&sg_key, 0, sizeof(sg_key));
233 sg_key.port = pg->key.port;
234 sg_key.addr = *sg_ip;
235 src_pg = br_sg_port_find(br, &sg_key);
236 if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
237 src_pg->rt_protocol != RTPROT_KERNEL)
240 br_multicast_find_del_pg(br, src_pg);
243 /* When a port group transitions to (or is added as) EXCLUDE we need to add it
244 * to all other ports' S,G entries which are not blocked by the current group
245 * for proper replication, the assumption is that any S,G blocked entries
246 * are already added so the S,G,port lookup should skip them.
247 * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
248 * deleted we need to remove it from all ports' S,G entries where it was
249 * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
251 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
254 struct net_bridge *br = pg->key.port->br;
255 struct net_bridge_port_group *pg_lst;
256 struct net_bridge_mdb_entry *mp;
259 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
262 mp = br_mdb_ip_get(br, &pg->key.addr);
266 memset(&sg_ip, 0, sizeof(sg_ip));
267 sg_ip = pg->key.addr;
268 for (pg_lst = mlock_dereference(mp->ports, br);
270 pg_lst = mlock_dereference(pg_lst->next, br)) {
271 struct net_bridge_group_src *src_ent;
275 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
276 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
278 sg_ip.src = src_ent->addr.src;
279 switch (filter_mode) {
281 __fwd_del_star_excl(pg, &sg_ip);
284 __fwd_add_star_excl(pg, &sg_ip);
291 /* called when adding a new S,G with host_joined == false by default */
292 static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
293 struct net_bridge_port_group *sg)
295 struct net_bridge_mdb_entry *sg_mp;
297 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
299 if (!star_mp->host_joined)
302 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
305 sg_mp->host_joined = true;
308 /* set the host_joined state of all of *,G's S,G entries */
309 static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
311 struct net_bridge *br = star_mp->br;
312 struct net_bridge_mdb_entry *sg_mp;
313 struct net_bridge_port_group *pg;
316 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
319 memset(&sg_ip, 0, sizeof(sg_ip));
320 sg_ip = star_mp->addr;
321 for (pg = mlock_dereference(star_mp->ports, br);
323 pg = mlock_dereference(pg->next, br)) {
324 struct net_bridge_group_src *src_ent;
326 hlist_for_each_entry(src_ent, &pg->src_list, node) {
327 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
329 sg_ip.src = src_ent->addr.src;
330 sg_mp = br_mdb_ip_get(br, &sg_ip);
333 sg_mp->host_joined = star_mp->host_joined;
338 static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
340 struct net_bridge_port_group __rcu **pp;
341 struct net_bridge_port_group *p;
343 /* *,G exclude ports are only added to S,G entries */
344 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
347 /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
348 * we should ignore perm entries since they're managed by user-space
350 for (pp = &sgmp->ports;
351 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
353 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
354 MDB_PG_FLAGS_PERMANENT)))
357 /* currently the host can only have joined the *,G which means
358 * we treat it as EXCLUDE {}, so for an S,G it's considered a
359 * STAR_EXCLUDE entry and we can safely leave it
361 sgmp->host_joined = false;
363 for (pp = &sgmp->ports;
364 (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
365 if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
366 br_multicast_del_pg(sgmp, p, pp);
372 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
373 struct net_bridge_port_group *sg)
375 struct net_bridge_port_group_sg_key sg_key;
376 struct net_bridge *br = star_mp->br;
377 struct net_bridge_port_group *pg;
379 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
381 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
384 br_multicast_sg_host_state(star_mp, sg);
385 memset(&sg_key, 0, sizeof(sg_key));
386 sg_key.addr = sg->key.addr;
387 /* we need to add all exclude ports to the S,G */
388 for (pg = mlock_dereference(star_mp->ports, br);
390 pg = mlock_dereference(pg->next, br)) {
391 struct net_bridge_port_group *src_pg;
393 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
396 sg_key.port = pg->key.port;
397 if (br_sg_port_find(br, &sg_key))
400 src_pg = __br_multicast_add_group(br, pg->key.port,
403 MCAST_INCLUDE, false, false);
404 if (IS_ERR_OR_NULL(src_pg) ||
405 src_pg->rt_protocol != RTPROT_KERNEL)
407 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
411 static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
413 struct net_bridge_mdb_entry *star_mp;
414 struct net_bridge_port_group *sg;
417 if (src->flags & BR_SGRP_F_INSTALLED)
420 memset(&sg_ip, 0, sizeof(sg_ip));
421 sg_ip = src->pg->key.addr;
422 sg_ip.src = src->addr.src;
423 sg = __br_multicast_add_group(src->br, src->pg->key.port, &sg_ip,
424 src->pg->eth_addr, MCAST_INCLUDE, false,
425 !timer_pending(&src->timer));
426 if (IS_ERR_OR_NULL(sg))
428 src->flags |= BR_SGRP_F_INSTALLED;
429 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
431 /* if it was added by user-space as perm we can skip next steps */
432 if (sg->rt_protocol != RTPROT_KERNEL &&
433 (sg->flags & MDB_PG_FLAGS_PERMANENT))
436 /* the kernel is now responsible for removing this S,G */
437 del_timer(&sg->timer);
438 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
442 br_multicast_sg_add_exclude_ports(star_mp, sg);
445 static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
448 struct net_bridge_port_group *p, *pg = src->pg;
449 struct net_bridge_port_group __rcu **pp;
450 struct net_bridge_mdb_entry *mp;
453 memset(&sg_ip, 0, sizeof(sg_ip));
454 sg_ip = pg->key.addr;
455 sg_ip.src = src->addr.src;
457 mp = br_mdb_ip_get(src->br, &sg_ip);
461 for (pp = &mp->ports;
462 (p = mlock_dereference(*pp, src->br)) != NULL;
464 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
467 if (p->rt_protocol != RTPROT_KERNEL &&
468 (p->flags & MDB_PG_FLAGS_PERMANENT))
472 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
473 br_multicast_del_pg(mp, p, pp);
476 src->flags &= ~BR_SGRP_F_INSTALLED;
479 /* install S,G and based on src's timer enable or disable forwarding */
480 static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
482 struct net_bridge_port_group_sg_key sg_key;
483 struct net_bridge_port_group *sg;
486 br_multicast_fwd_src_add(src);
488 memset(&sg_key, 0, sizeof(sg_key));
489 sg_key.addr = src->pg->key.addr;
490 sg_key.addr.src = src->addr.src;
491 sg_key.port = src->pg->key.port;
493 sg = br_sg_port_find(src->br, &sg_key);
494 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
497 old_flags = sg->flags;
498 if (timer_pending(&src->timer))
499 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
501 sg->flags |= MDB_PG_FLAGS_BLOCKED;
503 if (old_flags != sg->flags) {
504 struct net_bridge_mdb_entry *sg_mp;
506 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
509 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
513 static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
515 struct net_bridge_mdb_entry *mp;
517 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
518 WARN_ON(!hlist_unhashed(&mp->mdb_node));
521 del_timer_sync(&mp->timer);
525 static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
527 struct net_bridge *br = mp->br;
529 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
531 hlist_del_init_rcu(&mp->mdb_node);
532 hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
533 queue_work(system_long_wq, &br->mcast_gc_work);
536 static void br_multicast_group_expired(struct timer_list *t)
538 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
539 struct net_bridge *br = mp->br;
541 spin_lock(&br->multicast_lock);
542 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
543 timer_pending(&mp->timer))
546 br_multicast_host_leave(mp, true);
550 br_multicast_del_mdb_entry(mp);
552 spin_unlock(&br->multicast_lock);
555 static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
557 struct net_bridge_group_src *src;
559 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
560 WARN_ON(!hlist_unhashed(&src->node));
562 del_timer_sync(&src->timer);
566 void br_multicast_del_group_src(struct net_bridge_group_src *src,
569 struct net_bridge *br = src->pg->key.port->br;
571 br_multicast_fwd_src_remove(src, fastleave);
572 hlist_del_init_rcu(&src->node);
574 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
575 queue_work(system_long_wq, &br->mcast_gc_work);
578 static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
580 struct net_bridge_port_group *pg;
582 pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
583 WARN_ON(!hlist_unhashed(&pg->mglist));
584 WARN_ON(!hlist_empty(&pg->src_list));
586 del_timer_sync(&pg->rexmit_timer);
587 del_timer_sync(&pg->timer);
591 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
592 struct net_bridge_port_group *pg,
593 struct net_bridge_port_group __rcu **pp)
595 struct net_bridge *br = pg->key.port->br;
596 struct net_bridge_group_src *ent;
597 struct hlist_node *tmp;
599 rcu_assign_pointer(*pp, pg->next);
600 hlist_del_init(&pg->mglist);
601 br_multicast_eht_clean_sets(pg);
602 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
603 br_multicast_del_group_src(ent, false);
604 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
605 if (!br_multicast_is_star_g(&mp->addr)) {
606 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
607 br_sg_port_rht_params);
608 br_multicast_sg_del_exclude_ports(mp);
610 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
612 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
613 queue_work(system_long_wq, &br->mcast_gc_work);
615 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
616 mod_timer(&mp->timer, jiffies);
619 static void br_multicast_find_del_pg(struct net_bridge *br,
620 struct net_bridge_port_group *pg)
622 struct net_bridge_port_group __rcu **pp;
623 struct net_bridge_mdb_entry *mp;
624 struct net_bridge_port_group *p;
626 mp = br_mdb_ip_get(br, &pg->key.addr);
630 for (pp = &mp->ports;
631 (p = mlock_dereference(*pp, br)) != NULL;
636 br_multicast_del_pg(mp, pg, pp);
643 static void br_multicast_port_group_expired(struct timer_list *t)
645 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
646 struct net_bridge_group_src *src_ent;
647 struct net_bridge *br = pg->key.port->br;
648 struct hlist_node *tmp;
651 spin_lock(&br->multicast_lock);
652 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
653 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
656 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
657 pg->filter_mode = MCAST_INCLUDE;
658 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
659 if (!timer_pending(&src_ent->timer)) {
660 br_multicast_del_group_src(src_ent, false);
665 if (hlist_empty(&pg->src_list)) {
666 br_multicast_find_del_pg(br, pg);
667 } else if (changed) {
668 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
670 if (changed && br_multicast_is_star_g(&pg->key.addr))
671 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
675 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
678 spin_unlock(&br->multicast_lock);
681 static void br_multicast_gc(struct hlist_head *head)
683 struct net_bridge_mcast_gc *gcent;
684 struct hlist_node *tmp;
686 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
687 hlist_del_init(&gcent->gc_node);
688 gcent->destroy(gcent);
692 static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
693 struct net_bridge_port_group *pg,
694 __be32 ip_dst, __be32 group,
695 bool with_srcs, bool over_lmqt,
696 u8 sflag, u8 *igmp_type,
699 struct net_bridge_port *p = pg ? pg->key.port : NULL;
700 struct net_bridge_group_src *ent;
701 size_t pkt_size, igmp_hdr_size;
702 unsigned long now = jiffies;
703 struct igmpv3_query *ihv3;
704 void *csum_start = NULL;
705 __sum16 *csum = NULL;
713 igmp_hdr_size = sizeof(*ih);
714 if (br->multicast_igmp_version == 3) {
715 igmp_hdr_size = sizeof(*ihv3);
716 if (pg && with_srcs) {
717 lmqt = now + (br->multicast_last_member_interval *
718 br->multicast_last_member_count);
719 hlist_for_each_entry(ent, &pg->src_list, node) {
720 if (over_lmqt == time_after(ent->timer.expires,
722 ent->src_query_rexmit_cnt > 0)
728 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
732 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
733 if ((p && pkt_size > p->dev->mtu) ||
734 pkt_size > br->dev->mtu)
737 skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
741 skb->protocol = htons(ETH_P_IP);
743 skb_reset_mac_header(skb);
746 ether_addr_copy(eth->h_source, br->dev->dev_addr);
747 ip_eth_mc_map(ip_dst, eth->h_dest);
748 eth->h_proto = htons(ETH_P_IP);
749 skb_put(skb, sizeof(*eth));
751 skb_set_network_header(skb, skb->len);
753 iph->tot_len = htons(pkt_size - sizeof(*eth));
759 iph->frag_off = htons(IP_DF);
761 iph->protocol = IPPROTO_IGMP;
762 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
763 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
765 ((u8 *)&iph[1])[0] = IPOPT_RA;
766 ((u8 *)&iph[1])[1] = 4;
767 ((u8 *)&iph[1])[2] = 0;
768 ((u8 *)&iph[1])[3] = 0;
772 skb_set_transport_header(skb, skb->len);
773 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
775 switch (br->multicast_igmp_version) {
778 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
779 ih->code = (group ? br->multicast_last_member_interval :
780 br->multicast_query_response_interval) /
781 (HZ / IGMP_TIMER_SCALE);
785 csum_start = (void *)ih;
788 ihv3 = igmpv3_query_hdr(skb);
789 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
790 ihv3->code = (group ? br->multicast_last_member_interval :
791 br->multicast_query_response_interval) /
792 (HZ / IGMP_TIMER_SCALE);
794 ihv3->qqic = br->multicast_query_interval / HZ;
795 ihv3->nsrcs = htons(lmqt_srcs);
797 ihv3->suppress = sflag;
801 csum_start = (void *)ihv3;
802 if (!pg || !with_srcs)
806 hlist_for_each_entry(ent, &pg->src_list, node) {
807 if (over_lmqt == time_after(ent->timer.expires,
809 ent->src_query_rexmit_cnt > 0) {
810 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
811 ent->src_query_rexmit_cnt--;
812 if (need_rexmit && ent->src_query_rexmit_cnt)
816 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
823 if (WARN_ON(!csum || !csum_start)) {
828 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
829 skb_put(skb, igmp_hdr_size);
830 __skb_pull(skb, sizeof(*eth));
836 #if IS_ENABLED(CONFIG_IPV6)
837 static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
838 struct net_bridge_port_group *pg,
839 const struct in6_addr *ip6_dst,
840 const struct in6_addr *group,
841 bool with_srcs, bool over_llqt,
842 u8 sflag, u8 *igmp_type,
845 struct net_bridge_port *p = pg ? pg->key.port : NULL;
846 struct net_bridge_group_src *ent;
847 size_t pkt_size, mld_hdr_size;
848 unsigned long now = jiffies;
849 struct mld2_query *mld2q;
850 void *csum_start = NULL;
851 unsigned long interval;
852 __sum16 *csum = NULL;
853 struct ipv6hdr *ip6h;
854 struct mld_msg *mldq;
861 mld_hdr_size = sizeof(*mldq);
862 if (br->multicast_mld_version == 2) {
863 mld_hdr_size = sizeof(*mld2q);
864 if (pg && with_srcs) {
865 llqt = now + (br->multicast_last_member_interval *
866 br->multicast_last_member_count);
867 hlist_for_each_entry(ent, &pg->src_list, node) {
868 if (over_llqt == time_after(ent->timer.expires,
870 ent->src_query_rexmit_cnt > 0)
876 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
880 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
881 if ((p && pkt_size > p->dev->mtu) ||
882 pkt_size > br->dev->mtu)
885 skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
889 skb->protocol = htons(ETH_P_IPV6);
891 /* Ethernet header */
892 skb_reset_mac_header(skb);
895 ether_addr_copy(eth->h_source, br->dev->dev_addr);
896 eth->h_proto = htons(ETH_P_IPV6);
897 skb_put(skb, sizeof(*eth));
899 /* IPv6 header + HbH option */
900 skb_set_network_header(skb, skb->len);
901 ip6h = ipv6_hdr(skb);
903 *(__force __be32 *)ip6h = htonl(0x60000000);
904 ip6h->payload_len = htons(8 + mld_hdr_size);
905 ip6h->nexthdr = IPPROTO_HOPOPTS;
907 ip6h->daddr = *ip6_dst;
908 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
911 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
915 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
916 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
918 hopopt = (u8 *)(ip6h + 1);
919 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
920 hopopt[1] = 0; /* length of HbH */
921 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
922 hopopt[3] = 2; /* Length of RA Option */
923 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
925 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
926 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
928 skb_put(skb, sizeof(*ip6h) + 8);
931 skb_set_transport_header(skb, skb->len);
932 interval = ipv6_addr_any(group) ?
933 br->multicast_query_response_interval :
934 br->multicast_last_member_interval;
935 *igmp_type = ICMPV6_MGM_QUERY;
936 switch (br->multicast_mld_version) {
938 mldq = (struct mld_msg *)icmp6_hdr(skb);
939 mldq->mld_type = ICMPV6_MGM_QUERY;
942 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
943 mldq->mld_reserved = 0;
944 mldq->mld_mca = *group;
945 csum = &mldq->mld_cksum;
946 csum_start = (void *)mldq;
949 mld2q = (struct mld2_query *)icmp6_hdr(skb);
950 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
951 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
952 mld2q->mld2q_code = 0;
953 mld2q->mld2q_cksum = 0;
954 mld2q->mld2q_resv1 = 0;
955 mld2q->mld2q_resv2 = 0;
956 mld2q->mld2q_suppress = sflag;
957 mld2q->mld2q_qrv = 2;
958 mld2q->mld2q_nsrcs = htons(llqt_srcs);
959 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
960 mld2q->mld2q_mca = *group;
961 csum = &mld2q->mld2q_cksum;
962 csum_start = (void *)mld2q;
963 if (!pg || !with_srcs)
967 hlist_for_each_entry(ent, &pg->src_list, node) {
968 if (over_llqt == time_after(ent->timer.expires,
970 ent->src_query_rexmit_cnt > 0) {
971 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
972 ent->src_query_rexmit_cnt--;
973 if (need_rexmit && ent->src_query_rexmit_cnt)
977 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
984 if (WARN_ON(!csum || !csum_start)) {
989 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
991 csum_partial(csum_start, mld_hdr_size, 0));
992 skb_put(skb, mld_hdr_size);
993 __skb_pull(skb, sizeof(*eth));
1000 static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
1001 struct net_bridge_port_group *pg,
1002 struct br_ip *ip_dst,
1003 struct br_ip *group,
1004 bool with_srcs, bool over_lmqt,
1005 u8 sflag, u8 *igmp_type,
1010 switch (group->proto) {
1011 case htons(ETH_P_IP):
1012 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
1013 return br_ip4_multicast_alloc_query(br, pg,
1014 ip4_dst, group->dst.ip4,
1015 with_srcs, over_lmqt,
1018 #if IS_ENABLED(CONFIG_IPV6)
1019 case htons(ETH_P_IPV6): {
1020 struct in6_addr ip6_dst;
1023 ip6_dst = ip_dst->dst.ip6;
1025 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1028 return br_ip6_multicast_alloc_query(br, pg,
1029 &ip6_dst, &group->dst.ip6,
1030 with_srcs, over_lmqt,
1039 struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
1040 struct br_ip *group)
1042 struct net_bridge_mdb_entry *mp;
1045 mp = br_mdb_ip_get(br, group);
1049 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
1050 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1051 return ERR_PTR(-E2BIG);
1054 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1056 return ERR_PTR(-ENOMEM);
1060 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
1061 timer_setup(&mp->timer, br_multicast_group_expired, 0);
1062 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1068 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1074 static void br_multicast_group_src_expired(struct timer_list *t)
1076 struct net_bridge_group_src *src = from_timer(src, t, timer);
1077 struct net_bridge_port_group *pg;
1078 struct net_bridge *br = src->br;
1080 spin_lock(&br->multicast_lock);
1081 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1082 timer_pending(&src->timer))
1086 if (pg->filter_mode == MCAST_INCLUDE) {
1087 br_multicast_del_group_src(src, false);
1088 if (!hlist_empty(&pg->src_list))
1090 br_multicast_find_del_pg(br, pg);
1092 br_multicast_fwd_src_handle(src);
1096 spin_unlock(&br->multicast_lock);
1099 struct net_bridge_group_src *
1100 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1102 struct net_bridge_group_src *ent;
1104 switch (ip->proto) {
1105 case htons(ETH_P_IP):
1106 hlist_for_each_entry(ent, &pg->src_list, node)
1107 if (ip->src.ip4 == ent->addr.src.ip4)
1110 #if IS_ENABLED(CONFIG_IPV6)
1111 case htons(ETH_P_IPV6):
1112 hlist_for_each_entry(ent, &pg->src_list, node)
1113 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
1122 static struct net_bridge_group_src *
1123 br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1125 struct net_bridge_group_src *grp_src;
1127 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1130 switch (src_ip->proto) {
1131 case htons(ETH_P_IP):
1132 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1133 ipv4_is_multicast(src_ip->src.ip4))
1136 #if IS_ENABLED(CONFIG_IPV6)
1137 case htons(ETH_P_IPV6):
1138 if (ipv6_addr_any(&src_ip->src.ip6) ||
1139 ipv6_addr_is_multicast(&src_ip->src.ip6))
1145 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1146 if (unlikely(!grp_src))
1150 grp_src->br = pg->key.port->br;
1151 grp_src->addr = *src_ip;
1152 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
1153 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1155 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1161 struct net_bridge_port_group *br_multicast_new_port_group(
1162 struct net_bridge_port *port,
1163 struct br_ip *group,
1164 struct net_bridge_port_group __rcu *next,
1165 unsigned char flags,
1166 const unsigned char *src,
1170 struct net_bridge_port_group *p;
1172 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1176 p->key.addr = *group;
1179 p->filter_mode = filter_mode;
1180 p->rt_protocol = rt_protocol;
1181 p->eht_host_tree = RB_ROOT;
1182 p->eht_set_tree = RB_ROOT;
1183 p->mcast_gc.destroy = br_multicast_destroy_port_group;
1184 INIT_HLIST_HEAD(&p->src_list);
1186 if (!br_multicast_is_star_g(group) &&
1187 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1188 br_sg_port_rht_params)) {
1193 rcu_assign_pointer(p->next, next);
1194 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
1195 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1196 hlist_add_head(&p->mglist, &port->mglist);
1199 memcpy(p->eth_addr, src, ETH_ALEN);
1201 eth_broadcast_addr(p->eth_addr);
1206 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify)
1208 if (!mp->host_joined) {
1209 mp->host_joined = true;
1210 if (br_multicast_is_star_g(&mp->addr))
1211 br_multicast_star_g_host_state(mp);
1213 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1216 if (br_group_is_l2(&mp->addr))
1219 mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval);
1222 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1224 if (!mp->host_joined)
1227 mp->host_joined = false;
1228 if (br_multicast_is_star_g(&mp->addr))
1229 br_multicast_star_g_host_state(mp);
1231 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1234 static struct net_bridge_port_group *
1235 __br_multicast_add_group(struct net_bridge *br,
1236 struct net_bridge_port *port,
1237 struct br_ip *group,
1238 const unsigned char *src,
1243 struct net_bridge_port_group __rcu **pp;
1244 struct net_bridge_port_group *p = NULL;
1245 struct net_bridge_mdb_entry *mp;
1246 unsigned long now = jiffies;
1248 if (!netif_running(br->dev) ||
1249 (port && port->state == BR_STATE_DISABLED))
1252 mp = br_multicast_new_group(br, group);
1254 return ERR_CAST(mp);
1257 br_multicast_host_join(mp, true);
1261 for (pp = &mp->ports;
1262 (p = mlock_dereference(*pp, br)) != NULL;
1264 if (br_port_group_equal(p, port, src))
1266 if ((unsigned long)p->key.port < (unsigned long)port)
1270 p = br_multicast_new_port_group(port, group, *pp, 0, src,
1271 filter_mode, RTPROT_KERNEL);
1273 p = ERR_PTR(-ENOMEM);
1276 rcu_assign_pointer(*pp, p);
1278 p->flags |= MDB_PG_FLAGS_BLOCKED;
1279 br_mdb_notify(br->dev, mp, p, RTM_NEWMDB);
1283 mod_timer(&p->timer, now + br->multicast_membership_interval);
1289 static int br_multicast_add_group(struct net_bridge *br,
1290 struct net_bridge_port *port,
1291 struct br_ip *group,
1292 const unsigned char *src,
1296 struct net_bridge_port_group *pg;
1299 spin_lock(&br->multicast_lock);
1300 pg = __br_multicast_add_group(br, port, group, src, filter_mode,
1301 igmpv2_mldv1, false);
1302 /* NULL is considered valid for host joined groups */
1303 err = PTR_ERR_OR_ZERO(pg);
1304 spin_unlock(&br->multicast_lock);
1309 static int br_ip4_multicast_add_group(struct net_bridge *br,
1310 struct net_bridge_port *port,
1313 const unsigned char *src,
1316 struct br_ip br_group;
1319 if (ipv4_is_local_multicast(group))
1322 memset(&br_group, 0, sizeof(br_group));
1323 br_group.dst.ip4 = group;
1324 br_group.proto = htons(ETH_P_IP);
1326 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1328 return br_multicast_add_group(br, port, &br_group, src, filter_mode,
1332 #if IS_ENABLED(CONFIG_IPV6)
1333 static int br_ip6_multicast_add_group(struct net_bridge *br,
1334 struct net_bridge_port *port,
1335 const struct in6_addr *group,
1337 const unsigned char *src,
1340 struct br_ip br_group;
1343 if (ipv6_addr_is_ll_all_nodes(group))
1346 memset(&br_group, 0, sizeof(br_group));
1347 br_group.dst.ip6 = *group;
1348 br_group.proto = htons(ETH_P_IPV6);
1350 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1352 return br_multicast_add_group(br, port, &br_group, src, filter_mode,
1357 static void br_multicast_router_expired(struct timer_list *t)
1359 struct net_bridge_port *port =
1360 from_timer(port, t, multicast_router_timer);
1361 struct net_bridge *br = port->br;
1363 spin_lock(&br->multicast_lock);
1364 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1365 port->multicast_router == MDB_RTR_TYPE_PERM ||
1366 timer_pending(&port->multicast_router_timer))
1369 __del_port_router(port);
1371 spin_unlock(&br->multicast_lock);
1374 static void br_mc_router_state_change(struct net_bridge *p,
1377 struct switchdev_attr attr = {
1379 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1380 .flags = SWITCHDEV_F_DEFER,
1381 .u.mrouter = is_mc_router,
1384 switchdev_port_attr_set(p->dev, &attr, NULL);
1387 static void br_multicast_local_router_expired(struct timer_list *t)
1389 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
1391 spin_lock(&br->multicast_lock);
1392 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
1393 br->multicast_router == MDB_RTR_TYPE_PERM ||
1394 timer_pending(&br->multicast_router_timer))
1397 br_mc_router_state_change(br, false);
1399 spin_unlock(&br->multicast_lock);
1402 static void br_multicast_querier_expired(struct net_bridge *br,
1403 struct bridge_mcast_own_query *query)
1405 spin_lock(&br->multicast_lock);
1406 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1409 br_multicast_start_querier(br, query);
1412 spin_unlock(&br->multicast_lock);
1415 static void br_ip4_multicast_querier_expired(struct timer_list *t)
1417 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
1419 br_multicast_querier_expired(br, &br->ip4_own_query);
1422 #if IS_ENABLED(CONFIG_IPV6)
1423 static void br_ip6_multicast_querier_expired(struct timer_list *t)
1425 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
1427 br_multicast_querier_expired(br, &br->ip6_own_query);
1431 static void br_multicast_select_own_querier(struct net_bridge *br,
1433 struct sk_buff *skb)
1435 if (ip->proto == htons(ETH_P_IP))
1436 br->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
1437 #if IS_ENABLED(CONFIG_IPV6)
1439 br->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
1443 static void __br_multicast_send_query(struct net_bridge *br,
1444 struct net_bridge_port *port,
1445 struct net_bridge_port_group *pg,
1446 struct br_ip *ip_dst,
1447 struct br_ip *group,
1452 bool over_lmqt = !!sflag;
1453 struct sk_buff *skb;
1457 skb = br_multicast_alloc_query(br, pg, ip_dst, group, with_srcs,
1458 over_lmqt, sflag, &igmp_type,
1464 skb->dev = port->dev;
1465 br_multicast_count(br, port, skb, igmp_type,
1467 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
1468 dev_net(port->dev), NULL, skb, NULL, skb->dev,
1469 br_dev_queue_push_xmit);
1471 if (over_lmqt && with_srcs && sflag) {
1473 goto again_under_lmqt;
1476 br_multicast_select_own_querier(br, group, skb);
1477 br_multicast_count(br, port, skb, igmp_type,
1483 static void br_multicast_send_query(struct net_bridge *br,
1484 struct net_bridge_port *port,
1485 struct bridge_mcast_own_query *own_query)
1487 struct bridge_mcast_other_query *other_query = NULL;
1488 struct br_ip br_group;
1491 if (!netif_running(br->dev) ||
1492 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1493 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
1496 memset(&br_group.dst, 0, sizeof(br_group.dst));
1498 if (port ? (own_query == &port->ip4_own_query) :
1499 (own_query == &br->ip4_own_query)) {
1500 other_query = &br->ip4_other_query;
1501 br_group.proto = htons(ETH_P_IP);
1502 #if IS_ENABLED(CONFIG_IPV6)
1504 other_query = &br->ip6_other_query;
1505 br_group.proto = htons(ETH_P_IPV6);
1509 if (!other_query || timer_pending(&other_query->timer))
1512 __br_multicast_send_query(br, port, NULL, NULL, &br_group, false, 0,
1516 time += own_query->startup_sent < br->multicast_startup_query_count ?
1517 br->multicast_startup_query_interval :
1518 br->multicast_query_interval;
1519 mod_timer(&own_query->timer, time);
1523 br_multicast_port_query_expired(struct net_bridge_port *port,
1524 struct bridge_mcast_own_query *query)
1526 struct net_bridge *br = port->br;
1528 spin_lock(&br->multicast_lock);
1529 if (port->state == BR_STATE_DISABLED ||
1530 port->state == BR_STATE_BLOCKING)
1533 if (query->startup_sent < br->multicast_startup_query_count)
1534 query->startup_sent++;
1536 br_multicast_send_query(port->br, port, query);
1539 spin_unlock(&br->multicast_lock);
1542 static void br_ip4_multicast_port_query_expired(struct timer_list *t)
1544 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
1546 br_multicast_port_query_expired(port, &port->ip4_own_query);
1549 #if IS_ENABLED(CONFIG_IPV6)
1550 static void br_ip6_multicast_port_query_expired(struct timer_list *t)
1552 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
1554 br_multicast_port_query_expired(port, &port->ip6_own_query);
1558 static void br_multicast_port_group_rexmit(struct timer_list *t)
1560 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1561 struct bridge_mcast_other_query *other_query = NULL;
1562 struct net_bridge *br = pg->key.port->br;
1563 bool need_rexmit = false;
1565 spin_lock(&br->multicast_lock);
1566 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
1567 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1568 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
1571 if (pg->key.addr.proto == htons(ETH_P_IP))
1572 other_query = &br->ip4_other_query;
1573 #if IS_ENABLED(CONFIG_IPV6)
1575 other_query = &br->ip6_other_query;
1578 if (!other_query || timer_pending(&other_query->timer))
1581 if (pg->grp_query_rexmit_cnt) {
1582 pg->grp_query_rexmit_cnt--;
1583 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1584 &pg->key.addr, false, 1, NULL);
1586 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1587 &pg->key.addr, true, 0, &need_rexmit);
1589 if (pg->grp_query_rexmit_cnt || need_rexmit)
1590 mod_timer(&pg->rexmit_timer, jiffies +
1591 br->multicast_last_member_interval);
1593 spin_unlock(&br->multicast_lock);
1596 static int br_mc_disabled_update(struct net_device *dev, bool value,
1597 struct netlink_ext_ack *extack)
1599 struct switchdev_attr attr = {
1601 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1602 .flags = SWITCHDEV_F_DEFER,
1603 .u.mc_disabled = !value,
1606 return switchdev_port_attr_set(dev, &attr, extack);
1609 int br_multicast_add_port(struct net_bridge_port *port)
1613 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1614 port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
1616 timer_setup(&port->multicast_router_timer,
1617 br_multicast_router_expired, 0);
1618 timer_setup(&port->ip4_own_query.timer,
1619 br_ip4_multicast_port_query_expired, 0);
1620 #if IS_ENABLED(CONFIG_IPV6)
1621 timer_setup(&port->ip6_own_query.timer,
1622 br_ip6_multicast_port_query_expired, 0);
1624 err = br_mc_disabled_update(port->dev,
1625 br_opt_get(port->br,
1626 BROPT_MULTICAST_ENABLED),
1628 if (err && err != -EOPNOTSUPP)
1631 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
1632 if (!port->mcast_stats)
1638 void br_multicast_del_port(struct net_bridge_port *port)
1640 struct net_bridge *br = port->br;
1641 struct net_bridge_port_group *pg;
1642 HLIST_HEAD(deleted_head);
1643 struct hlist_node *n;
1645 /* Take care of the remaining groups, only perm ones should be left */
1646 spin_lock_bh(&br->multicast_lock);
1647 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
1648 br_multicast_find_del_pg(br, pg);
1649 hlist_move_list(&br->mcast_gc_list, &deleted_head);
1650 spin_unlock_bh(&br->multicast_lock);
1651 br_multicast_gc(&deleted_head);
1652 del_timer_sync(&port->multicast_router_timer);
1653 free_percpu(port->mcast_stats);
1656 static void br_multicast_enable(struct bridge_mcast_own_query *query)
1658 query->startup_sent = 0;
1660 if (try_to_del_timer_sync(&query->timer) >= 0 ||
1661 del_timer(&query->timer))
1662 mod_timer(&query->timer, jiffies);
1665 static void __br_multicast_enable_port(struct net_bridge_port *port)
1667 struct net_bridge *br = port->br;
1669 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
1672 br_multicast_enable(&port->ip4_own_query);
1673 #if IS_ENABLED(CONFIG_IPV6)
1674 br_multicast_enable(&port->ip6_own_query);
1676 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
1677 hlist_unhashed(&port->rlist))
1678 br_multicast_add_router(br, port);
1681 void br_multicast_enable_port(struct net_bridge_port *port)
1683 struct net_bridge *br = port->br;
1685 spin_lock(&br->multicast_lock);
1686 __br_multicast_enable_port(port);
1687 spin_unlock(&br->multicast_lock);
1690 void br_multicast_disable_port(struct net_bridge_port *port)
1692 struct net_bridge *br = port->br;
1693 struct net_bridge_port_group *pg;
1694 struct hlist_node *n;
1696 spin_lock(&br->multicast_lock);
1697 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
1698 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
1699 br_multicast_find_del_pg(br, pg);
1701 __del_port_router(port);
1703 del_timer(&port->multicast_router_timer);
1704 del_timer(&port->ip4_own_query.timer);
1705 #if IS_ENABLED(CONFIG_IPV6)
1706 del_timer(&port->ip6_own_query.timer);
1708 spin_unlock(&br->multicast_lock);
1711 static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
1713 struct net_bridge_group_src *ent;
1714 struct hlist_node *tmp;
1717 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
1718 if (ent->flags & BR_SGRP_F_DELETE) {
1719 br_multicast_del_group_src(ent, false);
1726 static void __grp_src_mod_timer(struct net_bridge_group_src *src,
1727 unsigned long expires)
1729 mod_timer(&src->timer, expires);
1730 br_multicast_fwd_src_handle(src);
1733 static void __grp_src_query_marked_and_rexmit(struct net_bridge_port_group *pg)
1735 struct bridge_mcast_other_query *other_query = NULL;
1736 struct net_bridge *br = pg->key.port->br;
1737 u32 lmqc = br->multicast_last_member_count;
1738 unsigned long lmqt, lmi, now = jiffies;
1739 struct net_bridge_group_src *ent;
1741 if (!netif_running(br->dev) ||
1742 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1745 if (pg->key.addr.proto == htons(ETH_P_IP))
1746 other_query = &br->ip4_other_query;
1747 #if IS_ENABLED(CONFIG_IPV6)
1749 other_query = &br->ip6_other_query;
1752 lmqt = now + br_multicast_lmqt(br);
1753 hlist_for_each_entry(ent, &pg->src_list, node) {
1754 if (ent->flags & BR_SGRP_F_SEND) {
1755 ent->flags &= ~BR_SGRP_F_SEND;
1756 if (ent->timer.expires > lmqt) {
1757 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
1759 !timer_pending(&other_query->timer))
1760 ent->src_query_rexmit_cnt = lmqc;
1761 __grp_src_mod_timer(ent, lmqt);
1766 if (!br_opt_get(br, BROPT_MULTICAST_QUERIER) ||
1767 !other_query || timer_pending(&other_query->timer))
1770 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1771 &pg->key.addr, true, 1, NULL);
1773 lmi = now + br->multicast_last_member_interval;
1774 if (!timer_pending(&pg->rexmit_timer) ||
1775 time_after(pg->rexmit_timer.expires, lmi))
1776 mod_timer(&pg->rexmit_timer, lmi);
1779 static void __grp_send_query_and_rexmit(struct net_bridge_port_group *pg)
1781 struct bridge_mcast_other_query *other_query = NULL;
1782 struct net_bridge *br = pg->key.port->br;
1783 unsigned long now = jiffies, lmi;
1785 if (!netif_running(br->dev) ||
1786 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1789 if (pg->key.addr.proto == htons(ETH_P_IP))
1790 other_query = &br->ip4_other_query;
1791 #if IS_ENABLED(CONFIG_IPV6)
1793 other_query = &br->ip6_other_query;
1796 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
1797 other_query && !timer_pending(&other_query->timer)) {
1798 lmi = now + br->multicast_last_member_interval;
1799 pg->grp_query_rexmit_cnt = br->multicast_last_member_count - 1;
1800 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1801 &pg->key.addr, false, 0, NULL);
1802 if (!timer_pending(&pg->rexmit_timer) ||
1803 time_after(pg->rexmit_timer.expires, lmi))
1804 mod_timer(&pg->rexmit_timer, lmi);
1807 if (pg->filter_mode == MCAST_EXCLUDE &&
1808 (!timer_pending(&pg->timer) ||
1809 time_after(pg->timer.expires, now + br_multicast_lmqt(br))))
1810 mod_timer(&pg->timer, now + br_multicast_lmqt(br));
1813 /* State Msg type New state Actions
1814 * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
1815 * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
1816 * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
1818 static bool br_multicast_isinc_allow(struct net_bridge_port_group *pg, void *h_addr,
1819 void *srcs, u32 nsrcs, size_t addr_size,
1822 struct net_bridge *br = pg->key.port->br;
1823 struct net_bridge_group_src *ent;
1824 unsigned long now = jiffies;
1825 bool changed = false;
1826 struct br_ip src_ip;
1829 memset(&src_ip, 0, sizeof(src_ip));
1830 src_ip.proto = pg->key.addr.proto;
1831 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1832 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
1833 ent = br_multicast_find_group_src(pg, &src_ip);
1835 ent = br_multicast_new_group_src(pg, &src_ip);
1841 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
1844 if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
1850 /* State Msg type New state Actions
1851 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
1855 static void __grp_src_isexc_incl(struct net_bridge_port_group *pg, void *h_addr,
1856 void *srcs, u32 nsrcs, size_t addr_size,
1859 struct net_bridge_group_src *ent;
1860 struct br_ip src_ip;
1863 hlist_for_each_entry(ent, &pg->src_list, node)
1864 ent->flags |= BR_SGRP_F_DELETE;
1866 memset(&src_ip, 0, sizeof(src_ip));
1867 src_ip.proto = pg->key.addr.proto;
1868 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1869 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
1870 ent = br_multicast_find_group_src(pg, &src_ip);
1872 ent->flags &= ~BR_SGRP_F_DELETE;
1874 ent = br_multicast_new_group_src(pg, &src_ip);
1876 br_multicast_fwd_src_handle(ent);
1879 br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type);
1881 __grp_src_delete_marked(pg);
1884 /* State Msg type New state Actions
1885 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
1890 static bool __grp_src_isexc_excl(struct net_bridge_port_group *pg, void *h_addr,
1891 void *srcs, u32 nsrcs, size_t addr_size,
1894 struct net_bridge *br = pg->key.port->br;
1895 struct net_bridge_group_src *ent;
1896 unsigned long now = jiffies;
1897 bool changed = false;
1898 struct br_ip src_ip;
1901 hlist_for_each_entry(ent, &pg->src_list, node)
1902 ent->flags |= BR_SGRP_F_DELETE;
1904 memset(&src_ip, 0, sizeof(src_ip));
1905 src_ip.proto = pg->key.addr.proto;
1906 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1907 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
1908 ent = br_multicast_find_group_src(pg, &src_ip);
1910 ent->flags &= ~BR_SGRP_F_DELETE;
1912 ent = br_multicast_new_group_src(pg, &src_ip);
1914 __grp_src_mod_timer(ent,
1915 now + br_multicast_gmi(br));
1921 if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
1924 if (__grp_src_delete_marked(pg))
1930 static bool br_multicast_isexc(struct net_bridge_port_group *pg, void *h_addr,
1931 void *srcs, u32 nsrcs, size_t addr_size,
1934 struct net_bridge *br = pg->key.port->br;
1935 bool changed = false;
1937 switch (pg->filter_mode) {
1939 __grp_src_isexc_incl(pg, h_addr, srcs, nsrcs, addr_size,
1941 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
1945 changed = __grp_src_isexc_excl(pg, h_addr, srcs, nsrcs, addr_size,
1950 pg->filter_mode = MCAST_EXCLUDE;
1951 mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
1956 /* State Msg type New state Actions
1957 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
1960 static bool __grp_src_toin_incl(struct net_bridge_port_group *pg, void *h_addr,
1961 void *srcs, u32 nsrcs, size_t addr_size,
1964 struct net_bridge *br = pg->key.port->br;
1965 u32 src_idx, to_send = pg->src_ents;
1966 struct net_bridge_group_src *ent;
1967 unsigned long now = jiffies;
1968 bool changed = false;
1969 struct br_ip src_ip;
1971 hlist_for_each_entry(ent, &pg->src_list, node)
1972 ent->flags |= BR_SGRP_F_SEND;
1974 memset(&src_ip, 0, sizeof(src_ip));
1975 src_ip.proto = pg->key.addr.proto;
1976 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1977 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
1978 ent = br_multicast_find_group_src(pg, &src_ip);
1980 ent->flags &= ~BR_SGRP_F_SEND;
1983 ent = br_multicast_new_group_src(pg, &src_ip);
1988 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
1991 if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
1995 __grp_src_query_marked_and_rexmit(pg);
2000 /* State Msg type New state Actions
2001 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
2005 static bool __grp_src_toin_excl(struct net_bridge_port_group *pg, void *h_addr,
2006 void *srcs, u32 nsrcs, size_t addr_size,
2009 struct net_bridge *br = pg->key.port->br;
2010 u32 src_idx, to_send = pg->src_ents;
2011 struct net_bridge_group_src *ent;
2012 unsigned long now = jiffies;
2013 bool changed = false;
2014 struct br_ip src_ip;
2016 hlist_for_each_entry(ent, &pg->src_list, node)
2017 if (timer_pending(&ent->timer))
2018 ent->flags |= BR_SGRP_F_SEND;
2020 memset(&src_ip, 0, sizeof(src_ip));
2021 src_ip.proto = pg->key.addr.proto;
2022 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2023 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2024 ent = br_multicast_find_group_src(pg, &src_ip);
2026 if (timer_pending(&ent->timer)) {
2027 ent->flags &= ~BR_SGRP_F_SEND;
2031 ent = br_multicast_new_group_src(pg, &src_ip);
2036 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
2039 if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
2043 __grp_src_query_marked_and_rexmit(pg);
2045 __grp_send_query_and_rexmit(pg);
2050 static bool br_multicast_toin(struct net_bridge_port_group *pg, void *h_addr,
2051 void *srcs, u32 nsrcs, size_t addr_size,
2054 bool changed = false;
2056 switch (pg->filter_mode) {
2058 changed = __grp_src_toin_incl(pg, h_addr, srcs, nsrcs, addr_size,
2062 changed = __grp_src_toin_excl(pg, h_addr, srcs, nsrcs, addr_size,
2067 if (br_multicast_eht_should_del_pg(pg)) {
2068 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2069 br_multicast_find_del_pg(pg->key.port->br, pg);
2070 /* a notification has already been sent and we shouldn't
2071 * access pg after the delete so we have to return false
2079 /* State Msg type New state Actions
2080 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2085 static void __grp_src_toex_incl(struct net_bridge_port_group *pg, void *h_addr,
2086 void *srcs, u32 nsrcs, size_t addr_size,
2089 struct net_bridge_group_src *ent;
2090 u32 src_idx, to_send = 0;
2091 struct br_ip src_ip;
2093 hlist_for_each_entry(ent, &pg->src_list, node)
2094 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2096 memset(&src_ip, 0, sizeof(src_ip));
2097 src_ip.proto = pg->key.addr.proto;
2098 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2099 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2100 ent = br_multicast_find_group_src(pg, &src_ip);
2102 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2106 ent = br_multicast_new_group_src(pg, &src_ip);
2109 br_multicast_fwd_src_handle(ent);
2112 br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type);
2114 __grp_src_delete_marked(pg);
2116 __grp_src_query_marked_and_rexmit(pg);
2119 /* State Msg type New state Actions
2120 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2126 static bool __grp_src_toex_excl(struct net_bridge_port_group *pg, void *h_addr,
2127 void *srcs, u32 nsrcs, size_t addr_size,
2130 struct net_bridge_group_src *ent;
2131 u32 src_idx, to_send = 0;
2132 bool changed = false;
2133 struct br_ip src_ip;
2135 hlist_for_each_entry(ent, &pg->src_list, node)
2136 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2138 memset(&src_ip, 0, sizeof(src_ip));
2139 src_ip.proto = pg->key.addr.proto;
2140 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2141 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2142 ent = br_multicast_find_group_src(pg, &src_ip);
2144 ent->flags &= ~BR_SGRP_F_DELETE;
2146 ent = br_multicast_new_group_src(pg, &src_ip);
2148 __grp_src_mod_timer(ent, pg->timer.expires);
2152 if (ent && timer_pending(&ent->timer)) {
2153 ent->flags |= BR_SGRP_F_SEND;
2158 if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
2161 if (__grp_src_delete_marked(pg))
2164 __grp_src_query_marked_and_rexmit(pg);
2169 static bool br_multicast_toex(struct net_bridge_port_group *pg, void *h_addr,
2170 void *srcs, u32 nsrcs, size_t addr_size,
2173 struct net_bridge *br = pg->key.port->br;
2174 bool changed = false;
2176 switch (pg->filter_mode) {
2178 __grp_src_toex_incl(pg, h_addr, srcs, nsrcs, addr_size,
2180 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2184 changed = __grp_src_toex_excl(pg, h_addr, srcs, nsrcs, addr_size,
2189 pg->filter_mode = MCAST_EXCLUDE;
2190 mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
2195 /* State Msg type New state Actions
2196 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2198 static bool __grp_src_block_incl(struct net_bridge_port_group *pg, void *h_addr,
2199 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2201 struct net_bridge_group_src *ent;
2202 u32 src_idx, to_send = 0;
2203 bool changed = false;
2204 struct br_ip src_ip;
2206 hlist_for_each_entry(ent, &pg->src_list, node)
2207 ent->flags &= ~BR_SGRP_F_SEND;
2209 memset(&src_ip, 0, sizeof(src_ip));
2210 src_ip.proto = pg->key.addr.proto;
2211 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2212 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2213 ent = br_multicast_find_group_src(pg, &src_ip);
2215 ent->flags |= BR_SGRP_F_SEND;
2220 if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
2224 __grp_src_query_marked_and_rexmit(pg);
2229 /* State Msg type New state Actions
2230 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2233 static bool __grp_src_block_excl(struct net_bridge_port_group *pg, void *h_addr,
2234 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2236 struct net_bridge_group_src *ent;
2237 u32 src_idx, to_send = 0;
2238 bool changed = false;
2239 struct br_ip src_ip;
2241 hlist_for_each_entry(ent, &pg->src_list, node)
2242 ent->flags &= ~BR_SGRP_F_SEND;
2244 memset(&src_ip, 0, sizeof(src_ip));
2245 src_ip.proto = pg->key.addr.proto;
2246 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2247 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2248 ent = br_multicast_find_group_src(pg, &src_ip);
2250 ent = br_multicast_new_group_src(pg, &src_ip);
2252 __grp_src_mod_timer(ent, pg->timer.expires);
2256 if (ent && timer_pending(&ent->timer)) {
2257 ent->flags |= BR_SGRP_F_SEND;
2262 if (br_multicast_eht_handle(pg, h_addr, srcs, nsrcs, addr_size, grec_type))
2266 __grp_src_query_marked_and_rexmit(pg);
2271 static bool br_multicast_block(struct net_bridge_port_group *pg, void *h_addr,
2272 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2274 bool changed = false;
2276 switch (pg->filter_mode) {
2278 changed = __grp_src_block_incl(pg, h_addr, srcs, nsrcs, addr_size,
2282 changed = __grp_src_block_excl(pg, h_addr, srcs, nsrcs, addr_size,
2287 if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
2288 br_multicast_eht_should_del_pg(pg)) {
2289 if (br_multicast_eht_should_del_pg(pg))
2290 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2291 br_multicast_find_del_pg(pg->key.port->br, pg);
2292 /* a notification has already been sent and we shouldn't
2293 * access pg after the delete so we have to return false
2301 static struct net_bridge_port_group *
2302 br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2303 struct net_bridge_port *p,
2304 const unsigned char *src)
2306 struct net_bridge *br __maybe_unused = mp->br;
2307 struct net_bridge_port_group *pg;
2309 for (pg = mlock_dereference(mp->ports, br);
2311 pg = mlock_dereference(pg->next, br))
2312 if (br_port_group_equal(pg, p, src))
2318 static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
2319 struct net_bridge_port *port,
2320 struct sk_buff *skb,
2323 bool igmpv2 = br->multicast_igmp_version == 2;
2324 struct net_bridge_mdb_entry *mdst;
2325 struct net_bridge_port_group *pg;
2326 const unsigned char *src;
2327 struct igmpv3_report *ih;
2328 struct igmpv3_grec *grec;
2329 int i, len, num, type;
2330 __be32 group, *h_addr;
2331 bool changed = false;
2335 ih = igmpv3_report_hdr(skb);
2336 num = ntohs(ih->ngrec);
2337 len = skb_transport_offset(skb) + sizeof(*ih);
2339 for (i = 0; i < num; i++) {
2340 len += sizeof(*grec);
2341 if (!ip_mc_may_pull(skb, len))
2344 grec = (void *)(skb->data + len - sizeof(*grec));
2345 group = grec->grec_mca;
2346 type = grec->grec_type;
2347 nsrcs = ntohs(grec->grec_nsrcs);
2350 if (!ip_mc_may_pull(skb, len))
2354 case IGMPV3_MODE_IS_INCLUDE:
2355 case IGMPV3_MODE_IS_EXCLUDE:
2356 case IGMPV3_CHANGE_TO_INCLUDE:
2357 case IGMPV3_CHANGE_TO_EXCLUDE:
2358 case IGMPV3_ALLOW_NEW_SOURCES:
2359 case IGMPV3_BLOCK_OLD_SOURCES:
2366 src = eth_hdr(skb)->h_source;
2368 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2369 type == IGMPV3_MODE_IS_INCLUDE)) {
2370 if (!port || igmpv2) {
2371 br_ip4_multicast_leave_group(br, port, group, vid, src);
2375 err = br_ip4_multicast_add_group(br, port, group, vid,
2381 if (!port || igmpv2)
2384 spin_lock_bh(&br->multicast_lock);
2385 mdst = br_mdb_ip4_get(br, group, vid);
2387 goto unlock_continue;
2388 pg = br_multicast_find_port(mdst, port, src);
2389 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2390 goto unlock_continue;
2391 /* reload grec and host addr */
2392 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
2393 h_addr = &ip_hdr(skb)->saddr;
2395 case IGMPV3_ALLOW_NEW_SOURCES:
2396 changed = br_multicast_isinc_allow(pg, h_addr, grec->grec_src,
2397 nsrcs, sizeof(__be32), type);
2399 case IGMPV3_MODE_IS_INCLUDE:
2400 changed = br_multicast_isinc_allow(pg, h_addr, grec->grec_src,
2401 nsrcs, sizeof(__be32), type);
2403 case IGMPV3_MODE_IS_EXCLUDE:
2404 changed = br_multicast_isexc(pg, h_addr, grec->grec_src,
2405 nsrcs, sizeof(__be32), type);
2407 case IGMPV3_CHANGE_TO_INCLUDE:
2408 changed = br_multicast_toin(pg, h_addr, grec->grec_src,
2409 nsrcs, sizeof(__be32), type);
2411 case IGMPV3_CHANGE_TO_EXCLUDE:
2412 changed = br_multicast_toex(pg, h_addr, grec->grec_src,
2413 nsrcs, sizeof(__be32), type);
2415 case IGMPV3_BLOCK_OLD_SOURCES:
2416 changed = br_multicast_block(pg, h_addr, grec->grec_src,
2417 nsrcs, sizeof(__be32), type);
2421 br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
2423 spin_unlock_bh(&br->multicast_lock);
2429 #if IS_ENABLED(CONFIG_IPV6)
2430 static int br_ip6_multicast_mld2_report(struct net_bridge *br,
2431 struct net_bridge_port *port,
2432 struct sk_buff *skb,
2435 bool mldv1 = br->multicast_mld_version == 1;
2436 struct net_bridge_mdb_entry *mdst;
2437 struct net_bridge_port_group *pg;
2438 unsigned int nsrcs_offset;
2439 const unsigned char *src;
2440 struct icmp6hdr *icmp6h;
2441 struct in6_addr *h_addr;
2442 struct mld2_grec *grec;
2443 unsigned int grec_len;
2444 bool changed = false;
2448 if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
2451 icmp6h = icmp6_hdr(skb);
2452 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
2453 len = skb_transport_offset(skb) + sizeof(*icmp6h);
2455 for (i = 0; i < num; i++) {
2456 __be16 *_nsrcs, __nsrcs;
2459 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2461 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
2462 nsrcs_offset + sizeof(__nsrcs))
2465 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2466 sizeof(__nsrcs), &__nsrcs);
2470 nsrcs = ntohs(*_nsrcs);
2471 grec_len = struct_size(grec, grec_src, nsrcs);
2473 if (!ipv6_mc_may_pull(skb, len + grec_len))
2476 grec = (struct mld2_grec *)(skb->data + len);
2479 switch (grec->grec_type) {
2480 case MLD2_MODE_IS_INCLUDE:
2481 case MLD2_MODE_IS_EXCLUDE:
2482 case MLD2_CHANGE_TO_INCLUDE:
2483 case MLD2_CHANGE_TO_EXCLUDE:
2484 case MLD2_ALLOW_NEW_SOURCES:
2485 case MLD2_BLOCK_OLD_SOURCES:
2492 src = eth_hdr(skb)->h_source;
2493 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2494 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
2496 if (!port || mldv1) {
2497 br_ip6_multicast_leave_group(br, port,
2503 err = br_ip6_multicast_add_group(br, port,
2504 &grec->grec_mca, vid,
2513 spin_lock_bh(&br->multicast_lock);
2514 mdst = br_mdb_ip6_get(br, &grec->grec_mca, vid);
2516 goto unlock_continue;
2517 pg = br_multicast_find_port(mdst, port, src);
2518 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2519 goto unlock_continue;
2520 h_addr = &ipv6_hdr(skb)->saddr;
2521 switch (grec->grec_type) {
2522 case MLD2_ALLOW_NEW_SOURCES:
2523 changed = br_multicast_isinc_allow(pg, h_addr,
2524 grec->grec_src, nsrcs,
2525 sizeof(struct in6_addr),
2528 case MLD2_MODE_IS_INCLUDE:
2529 changed = br_multicast_isinc_allow(pg, h_addr,
2530 grec->grec_src, nsrcs,
2531 sizeof(struct in6_addr),
2534 case MLD2_MODE_IS_EXCLUDE:
2535 changed = br_multicast_isexc(pg, h_addr,
2536 grec->grec_src, nsrcs,
2537 sizeof(struct in6_addr),
2540 case MLD2_CHANGE_TO_INCLUDE:
2541 changed = br_multicast_toin(pg, h_addr,
2542 grec->grec_src, nsrcs,
2543 sizeof(struct in6_addr),
2546 case MLD2_CHANGE_TO_EXCLUDE:
2547 changed = br_multicast_toex(pg, h_addr,
2548 grec->grec_src, nsrcs,
2549 sizeof(struct in6_addr),
2552 case MLD2_BLOCK_OLD_SOURCES:
2553 changed = br_multicast_block(pg, h_addr,
2554 grec->grec_src, nsrcs,
2555 sizeof(struct in6_addr),
2560 br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
2562 spin_unlock_bh(&br->multicast_lock);
2569 static bool br_ip4_multicast_select_querier(struct net_bridge *br,
2570 struct net_bridge_port *port,
2573 if (!timer_pending(&br->ip4_own_query.timer) &&
2574 !timer_pending(&br->ip4_other_query.timer))
2577 if (!br->ip4_querier.addr.src.ip4)
2580 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.src.ip4))
2586 br->ip4_querier.addr.src.ip4 = saddr;
2588 /* update protected by general multicast_lock by caller */
2589 rcu_assign_pointer(br->ip4_querier.port, port);
2594 #if IS_ENABLED(CONFIG_IPV6)
2595 static bool br_ip6_multicast_select_querier(struct net_bridge *br,
2596 struct net_bridge_port *port,
2597 struct in6_addr *saddr)
2599 if (!timer_pending(&br->ip6_own_query.timer) &&
2600 !timer_pending(&br->ip6_other_query.timer))
2603 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.src.ip6) <= 0)
2609 br->ip6_querier.addr.src.ip6 = *saddr;
2611 /* update protected by general multicast_lock by caller */
2612 rcu_assign_pointer(br->ip6_querier.port, port);
2618 static bool br_multicast_select_querier(struct net_bridge *br,
2619 struct net_bridge_port *port,
2620 struct br_ip *saddr)
2622 switch (saddr->proto) {
2623 case htons(ETH_P_IP):
2624 return br_ip4_multicast_select_querier(br, port, saddr->src.ip4);
2625 #if IS_ENABLED(CONFIG_IPV6)
2626 case htons(ETH_P_IPV6):
2627 return br_ip6_multicast_select_querier(br, port, &saddr->src.ip6);
2635 br_multicast_update_query_timer(struct net_bridge *br,
2636 struct bridge_mcast_other_query *query,
2637 unsigned long max_delay)
2639 if (!timer_pending(&query->timer))
2640 query->delay_time = jiffies + max_delay;
2642 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
2645 static void br_port_mc_router_state_change(struct net_bridge_port *p,
2648 struct switchdev_attr attr = {
2650 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
2651 .flags = SWITCHDEV_F_DEFER,
2652 .u.mrouter = is_mc_router,
2655 switchdev_port_attr_set(p->dev, &attr, NULL);
2659 * Add port to router_list
2660 * list is maintained ordered by pointer value
2661 * and locked by br->multicast_lock and RCU
2663 static void br_multicast_add_router(struct net_bridge *br,
2664 struct net_bridge_port *port)
2666 struct net_bridge_port *p;
2667 struct hlist_node *slot = NULL;
2669 if (!hlist_unhashed(&port->rlist))
2672 hlist_for_each_entry(p, &br->router_list, rlist) {
2673 if ((unsigned long) port >= (unsigned long) p)
2679 hlist_add_behind_rcu(&port->rlist, slot);
2681 hlist_add_head_rcu(&port->rlist, &br->router_list);
2682 br_rtr_notify(br->dev, port, RTM_NEWMDB);
2683 br_port_mc_router_state_change(port, true);
2686 static void br_multicast_mark_router(struct net_bridge *br,
2687 struct net_bridge_port *port)
2689 unsigned long now = jiffies;
2692 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
2693 if (!timer_pending(&br->multicast_router_timer))
2694 br_mc_router_state_change(br, true);
2695 mod_timer(&br->multicast_router_timer,
2696 now + br->multicast_querier_interval);
2701 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
2702 port->multicast_router == MDB_RTR_TYPE_PERM)
2705 br_multicast_add_router(br, port);
2707 mod_timer(&port->multicast_router_timer,
2708 now + br->multicast_querier_interval);
2711 static void br_multicast_query_received(struct net_bridge *br,
2712 struct net_bridge_port *port,
2713 struct bridge_mcast_other_query *query,
2714 struct br_ip *saddr,
2715 unsigned long max_delay)
2717 if (!br_multicast_select_querier(br, port, saddr))
2720 br_multicast_update_query_timer(br, query, max_delay);
2721 br_multicast_mark_router(br, port);
2724 static void br_ip4_multicast_query(struct net_bridge *br,
2725 struct net_bridge_port *port,
2726 struct sk_buff *skb,
2729 unsigned int transport_len = ip_transport_len(skb);
2730 const struct iphdr *iph = ip_hdr(skb);
2731 struct igmphdr *ih = igmp_hdr(skb);
2732 struct net_bridge_mdb_entry *mp;
2733 struct igmpv3_query *ih3;
2734 struct net_bridge_port_group *p;
2735 struct net_bridge_port_group __rcu **pp;
2737 unsigned long max_delay;
2738 unsigned long now = jiffies;
2741 spin_lock(&br->multicast_lock);
2742 if (!netif_running(br->dev) ||
2743 (port && port->state == BR_STATE_DISABLED))
2748 if (transport_len == sizeof(*ih)) {
2749 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
2752 max_delay = 10 * HZ;
2755 } else if (transport_len >= sizeof(*ih3)) {
2756 ih3 = igmpv3_query_hdr(skb);
2758 (br->multicast_igmp_version == 3 && group && ih3->suppress))
2761 max_delay = ih3->code ?
2762 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
2768 saddr.proto = htons(ETH_P_IP);
2769 saddr.src.ip4 = iph->saddr;
2771 br_multicast_query_received(br, port, &br->ip4_other_query,
2776 mp = br_mdb_ip4_get(br, group, vid);
2780 max_delay *= br->multicast_last_member_count;
2782 if (mp->host_joined &&
2783 (timer_pending(&mp->timer) ?
2784 time_after(mp->timer.expires, now + max_delay) :
2785 try_to_del_timer_sync(&mp->timer) >= 0))
2786 mod_timer(&mp->timer, now + max_delay);
2788 for (pp = &mp->ports;
2789 (p = mlock_dereference(*pp, br)) != NULL;
2791 if (timer_pending(&p->timer) ?
2792 time_after(p->timer.expires, now + max_delay) :
2793 try_to_del_timer_sync(&p->timer) >= 0 &&
2794 (br->multicast_igmp_version == 2 ||
2795 p->filter_mode == MCAST_EXCLUDE))
2796 mod_timer(&p->timer, now + max_delay);
2800 spin_unlock(&br->multicast_lock);
2803 #if IS_ENABLED(CONFIG_IPV6)
2804 static int br_ip6_multicast_query(struct net_bridge *br,
2805 struct net_bridge_port *port,
2806 struct sk_buff *skb,
2809 unsigned int transport_len = ipv6_transport_len(skb);
2810 struct mld_msg *mld;
2811 struct net_bridge_mdb_entry *mp;
2812 struct mld2_query *mld2q;
2813 struct net_bridge_port_group *p;
2814 struct net_bridge_port_group __rcu **pp;
2816 unsigned long max_delay;
2817 unsigned long now = jiffies;
2818 unsigned int offset = skb_transport_offset(skb);
2819 const struct in6_addr *group = NULL;
2820 bool is_general_query;
2823 spin_lock(&br->multicast_lock);
2824 if (!netif_running(br->dev) ||
2825 (port && port->state == BR_STATE_DISABLED))
2828 if (transport_len == sizeof(*mld)) {
2829 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
2833 mld = (struct mld_msg *) icmp6_hdr(skb);
2834 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
2836 group = &mld->mld_mca;
2838 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
2842 mld2q = (struct mld2_query *)icmp6_hdr(skb);
2843 if (!mld2q->mld2q_nsrcs)
2844 group = &mld2q->mld2q_mca;
2845 if (br->multicast_mld_version == 2 &&
2846 !ipv6_addr_any(&mld2q->mld2q_mca) &&
2847 mld2q->mld2q_suppress)
2850 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
2853 is_general_query = group && ipv6_addr_any(group);
2855 if (is_general_query) {
2856 saddr.proto = htons(ETH_P_IPV6);
2857 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
2859 br_multicast_query_received(br, port, &br->ip6_other_query,
2862 } else if (!group) {
2866 mp = br_mdb_ip6_get(br, group, vid);
2870 max_delay *= br->multicast_last_member_count;
2871 if (mp->host_joined &&
2872 (timer_pending(&mp->timer) ?
2873 time_after(mp->timer.expires, now + max_delay) :
2874 try_to_del_timer_sync(&mp->timer) >= 0))
2875 mod_timer(&mp->timer, now + max_delay);
2877 for (pp = &mp->ports;
2878 (p = mlock_dereference(*pp, br)) != NULL;
2880 if (timer_pending(&p->timer) ?
2881 time_after(p->timer.expires, now + max_delay) :
2882 try_to_del_timer_sync(&p->timer) >= 0 &&
2883 (br->multicast_mld_version == 1 ||
2884 p->filter_mode == MCAST_EXCLUDE))
2885 mod_timer(&p->timer, now + max_delay);
2889 spin_unlock(&br->multicast_lock);
2895 br_multicast_leave_group(struct net_bridge *br,
2896 struct net_bridge_port *port,
2897 struct br_ip *group,
2898 struct bridge_mcast_other_query *other_query,
2899 struct bridge_mcast_own_query *own_query,
2900 const unsigned char *src)
2902 struct net_bridge_mdb_entry *mp;
2903 struct net_bridge_port_group *p;
2907 spin_lock(&br->multicast_lock);
2908 if (!netif_running(br->dev) ||
2909 (port && port->state == BR_STATE_DISABLED))
2912 mp = br_mdb_ip_get(br, group);
2916 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
2917 struct net_bridge_port_group __rcu **pp;
2919 for (pp = &mp->ports;
2920 (p = mlock_dereference(*pp, br)) != NULL;
2922 if (!br_port_group_equal(p, port, src))
2925 if (p->flags & MDB_PG_FLAGS_PERMANENT)
2928 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2929 br_multicast_del_pg(mp, p, pp);
2934 if (timer_pending(&other_query->timer))
2937 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
2938 __br_multicast_send_query(br, port, NULL, NULL, &mp->addr,
2941 time = jiffies + br->multicast_last_member_count *
2942 br->multicast_last_member_interval;
2944 mod_timer(&own_query->timer, time);
2946 for (p = mlock_dereference(mp->ports, br);
2948 p = mlock_dereference(p->next, br)) {
2949 if (!br_port_group_equal(p, port, src))
2952 if (!hlist_unhashed(&p->mglist) &&
2953 (timer_pending(&p->timer) ?
2954 time_after(p->timer.expires, time) :
2955 try_to_del_timer_sync(&p->timer) >= 0)) {
2956 mod_timer(&p->timer, time);
2964 time = now + br->multicast_last_member_count *
2965 br->multicast_last_member_interval;
2968 if (mp->host_joined &&
2969 (timer_pending(&mp->timer) ?
2970 time_after(mp->timer.expires, time) :
2971 try_to_del_timer_sync(&mp->timer) >= 0)) {
2972 mod_timer(&mp->timer, time);
2978 for (p = mlock_dereference(mp->ports, br);
2980 p = mlock_dereference(p->next, br)) {
2981 if (p->key.port != port)
2984 if (!hlist_unhashed(&p->mglist) &&
2985 (timer_pending(&p->timer) ?
2986 time_after(p->timer.expires, time) :
2987 try_to_del_timer_sync(&p->timer) >= 0)) {
2988 mod_timer(&p->timer, time);
2994 spin_unlock(&br->multicast_lock);
2997 static void br_ip4_multicast_leave_group(struct net_bridge *br,
2998 struct net_bridge_port *port,
3001 const unsigned char *src)
3003 struct br_ip br_group;
3004 struct bridge_mcast_own_query *own_query;
3006 if (ipv4_is_local_multicast(group))
3009 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
3011 memset(&br_group, 0, sizeof(br_group));
3012 br_group.dst.ip4 = group;
3013 br_group.proto = htons(ETH_P_IP);
3016 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
3020 #if IS_ENABLED(CONFIG_IPV6)
3021 static void br_ip6_multicast_leave_group(struct net_bridge *br,
3022 struct net_bridge_port *port,
3023 const struct in6_addr *group,
3025 const unsigned char *src)
3027 struct br_ip br_group;
3028 struct bridge_mcast_own_query *own_query;
3030 if (ipv6_addr_is_ll_all_nodes(group))
3033 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
3035 memset(&br_group, 0, sizeof(br_group));
3036 br_group.dst.ip6 = *group;
3037 br_group.proto = htons(ETH_P_IPV6);
3040 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
3045 static void br_multicast_err_count(const struct net_bridge *br,
3046 const struct net_bridge_port *p,
3049 struct bridge_mcast_stats __percpu *stats;
3050 struct bridge_mcast_stats *pstats;
3052 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
3056 stats = p->mcast_stats;
3058 stats = br->mcast_stats;
3059 if (WARN_ON(!stats))
3062 pstats = this_cpu_ptr(stats);
3064 u64_stats_update_begin(&pstats->syncp);
3066 case htons(ETH_P_IP):
3067 pstats->mstats.igmp_parse_errors++;
3069 #if IS_ENABLED(CONFIG_IPV6)
3070 case htons(ETH_P_IPV6):
3071 pstats->mstats.mld_parse_errors++;
3075 u64_stats_update_end(&pstats->syncp);
3078 static void br_multicast_pim(struct net_bridge *br,
3079 struct net_bridge_port *port,
3080 const struct sk_buff *skb)
3082 unsigned int offset = skb_transport_offset(skb);
3083 struct pimhdr *pimhdr, _pimhdr;
3085 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
3086 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
3087 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
3090 spin_lock(&br->multicast_lock);
3091 br_multicast_mark_router(br, port);
3092 spin_unlock(&br->multicast_lock);
3095 static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
3096 struct net_bridge_port *port,
3097 struct sk_buff *skb)
3099 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3100 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3103 spin_lock(&br->multicast_lock);
3104 br_multicast_mark_router(br, port);
3105 spin_unlock(&br->multicast_lock);
3110 static int br_multicast_ipv4_rcv(struct net_bridge *br,
3111 struct net_bridge_port *port,
3112 struct sk_buff *skb,
3115 const unsigned char *src;
3119 err = ip_mc_check_igmp(skb);
3121 if (err == -ENOMSG) {
3122 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
3123 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3124 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3125 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
3126 br_multicast_pim(br, port, skb);
3127 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
3128 br_ip4_multicast_mrd_rcv(br, port, skb);
3132 } else if (err < 0) {
3133 br_multicast_err_count(br, port, skb->protocol);
3138 src = eth_hdr(skb)->h_source;
3139 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
3142 case IGMP_HOST_MEMBERSHIP_REPORT:
3143 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3144 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3145 err = br_ip4_multicast_add_group(br, port, ih->group, vid, src,
3148 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3149 err = br_ip4_multicast_igmp3_report(br, port, skb, vid);
3151 case IGMP_HOST_MEMBERSHIP_QUERY:
3152 br_ip4_multicast_query(br, port, skb, vid);
3154 case IGMP_HOST_LEAVE_MESSAGE:
3155 br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
3159 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
3165 #if IS_ENABLED(CONFIG_IPV6)
3166 static void br_ip6_multicast_mrd_rcv(struct net_bridge *br,
3167 struct net_bridge_port *port,
3168 struct sk_buff *skb)
3170 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
3173 spin_lock(&br->multicast_lock);
3174 br_multicast_mark_router(br, port);
3175 spin_unlock(&br->multicast_lock);
3178 static int br_multicast_ipv6_rcv(struct net_bridge *br,
3179 struct net_bridge_port *port,
3180 struct sk_buff *skb,
3183 const unsigned char *src;
3184 struct mld_msg *mld;
3187 err = ipv6_mc_check_mld(skb);
3189 if (err == -ENOMSG || err == -ENODATA) {
3190 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3191 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3192 if (err == -ENODATA &&
3193 ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
3194 br_ip6_multicast_mrd_rcv(br, port, skb);
3197 } else if (err < 0) {
3198 br_multicast_err_count(br, port, skb->protocol);
3202 mld = (struct mld_msg *)skb_transport_header(skb);
3203 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
3205 switch (mld->mld_type) {
3206 case ICMPV6_MGM_REPORT:
3207 src = eth_hdr(skb)->h_source;
3208 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3209 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
3212 case ICMPV6_MLD2_REPORT:
3213 err = br_ip6_multicast_mld2_report(br, port, skb, vid);
3215 case ICMPV6_MGM_QUERY:
3216 err = br_ip6_multicast_query(br, port, skb, vid);
3218 case ICMPV6_MGM_REDUCTION:
3219 src = eth_hdr(skb)->h_source;
3220 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
3224 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
3231 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
3232 struct sk_buff *skb, u16 vid)
3236 BR_INPUT_SKB_CB(skb)->igmp = 0;
3237 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3239 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
3242 switch (skb->protocol) {
3243 case htons(ETH_P_IP):
3244 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
3246 #if IS_ENABLED(CONFIG_IPV6)
3247 case htons(ETH_P_IPV6):
3248 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
3256 static void br_multicast_query_expired(struct net_bridge *br,
3257 struct bridge_mcast_own_query *query,
3258 struct bridge_mcast_querier *querier)
3260 spin_lock(&br->multicast_lock);
3261 if (query->startup_sent < br->multicast_startup_query_count)
3262 query->startup_sent++;
3264 RCU_INIT_POINTER(querier->port, NULL);
3265 br_multicast_send_query(br, NULL, query);
3266 spin_unlock(&br->multicast_lock);
3269 static void br_ip4_multicast_query_expired(struct timer_list *t)
3271 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
3273 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
3276 #if IS_ENABLED(CONFIG_IPV6)
3277 static void br_ip6_multicast_query_expired(struct timer_list *t)
3279 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
3281 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
3285 static void br_multicast_gc_work(struct work_struct *work)
3287 struct net_bridge *br = container_of(work, struct net_bridge,
3289 HLIST_HEAD(deleted_head);
3291 spin_lock_bh(&br->multicast_lock);
3292 hlist_move_list(&br->mcast_gc_list, &deleted_head);
3293 spin_unlock_bh(&br->multicast_lock);
3295 br_multicast_gc(&deleted_head);
3298 void br_multicast_init(struct net_bridge *br)
3300 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
3302 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3303 br->multicast_last_member_count = 2;
3304 br->multicast_startup_query_count = 2;
3306 br->multicast_last_member_interval = HZ;
3307 br->multicast_query_response_interval = 10 * HZ;
3308 br->multicast_startup_query_interval = 125 * HZ / 4;
3309 br->multicast_query_interval = 125 * HZ;
3310 br->multicast_querier_interval = 255 * HZ;
3311 br->multicast_membership_interval = 260 * HZ;
3313 br->ip4_other_query.delay_time = 0;
3314 br->ip4_querier.port = NULL;
3315 br->multicast_igmp_version = 2;
3316 #if IS_ENABLED(CONFIG_IPV6)
3317 br->multicast_mld_version = 1;
3318 br->ip6_other_query.delay_time = 0;
3319 br->ip6_querier.port = NULL;
3321 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
3322 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
3324 spin_lock_init(&br->multicast_lock);
3325 timer_setup(&br->multicast_router_timer,
3326 br_multicast_local_router_expired, 0);
3327 timer_setup(&br->ip4_other_query.timer,
3328 br_ip4_multicast_querier_expired, 0);
3329 timer_setup(&br->ip4_own_query.timer,
3330 br_ip4_multicast_query_expired, 0);
3331 #if IS_ENABLED(CONFIG_IPV6)
3332 timer_setup(&br->ip6_other_query.timer,
3333 br_ip6_multicast_querier_expired, 0);
3334 timer_setup(&br->ip6_own_query.timer,
3335 br_ip6_multicast_query_expired, 0);
3337 INIT_HLIST_HEAD(&br->mdb_list);
3338 INIT_HLIST_HEAD(&br->mcast_gc_list);
3339 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
3342 static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
3344 struct in_device *in_dev = in_dev_get(br->dev);
3349 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
3353 #if IS_ENABLED(CONFIG_IPV6)
3354 static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3356 struct in6_addr addr;
3358 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3359 ipv6_dev_mc_inc(br->dev, &addr);
3362 static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3367 void br_multicast_join_snoopers(struct net_bridge *br)
3369 br_ip4_multicast_join_snoopers(br);
3370 br_ip6_multicast_join_snoopers(br);
3373 static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
3375 struct in_device *in_dev = in_dev_get(br->dev);
3377 if (WARN_ON(!in_dev))
3380 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
3384 #if IS_ENABLED(CONFIG_IPV6)
3385 static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3387 struct in6_addr addr;
3389 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3390 ipv6_dev_mc_dec(br->dev, &addr);
3393 static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3398 void br_multicast_leave_snoopers(struct net_bridge *br)
3400 br_ip4_multicast_leave_snoopers(br);
3401 br_ip6_multicast_leave_snoopers(br);
3404 static void __br_multicast_open(struct net_bridge *br,
3405 struct bridge_mcast_own_query *query)
3407 query->startup_sent = 0;
3409 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
3412 mod_timer(&query->timer, jiffies);
3415 void br_multicast_open(struct net_bridge *br)
3417 __br_multicast_open(br, &br->ip4_own_query);
3418 #if IS_ENABLED(CONFIG_IPV6)
3419 __br_multicast_open(br, &br->ip6_own_query);
3423 void br_multicast_stop(struct net_bridge *br)
3425 del_timer_sync(&br->multicast_router_timer);
3426 del_timer_sync(&br->ip4_other_query.timer);
3427 del_timer_sync(&br->ip4_own_query.timer);
3428 #if IS_ENABLED(CONFIG_IPV6)
3429 del_timer_sync(&br->ip6_other_query.timer);
3430 del_timer_sync(&br->ip6_own_query.timer);
3434 void br_multicast_dev_del(struct net_bridge *br)
3436 struct net_bridge_mdb_entry *mp;
3437 HLIST_HEAD(deleted_head);
3438 struct hlist_node *tmp;
3440 spin_lock_bh(&br->multicast_lock);
3441 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
3442 br_multicast_del_mdb_entry(mp);
3443 hlist_move_list(&br->mcast_gc_list, &deleted_head);
3444 spin_unlock_bh(&br->multicast_lock);
3446 br_multicast_gc(&deleted_head);
3447 cancel_work_sync(&br->mcast_gc_work);
3452 int br_multicast_set_router(struct net_bridge *br, unsigned long val)
3456 spin_lock_bh(&br->multicast_lock);
3459 case MDB_RTR_TYPE_DISABLED:
3460 case MDB_RTR_TYPE_PERM:
3461 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
3462 del_timer(&br->multicast_router_timer);
3463 br->multicast_router = val;
3466 case MDB_RTR_TYPE_TEMP_QUERY:
3467 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
3468 br_mc_router_state_change(br, false);
3469 br->multicast_router = val;
3474 spin_unlock_bh(&br->multicast_lock);
3479 static void __del_port_router(struct net_bridge_port *p)
3481 if (hlist_unhashed(&p->rlist))
3483 hlist_del_init_rcu(&p->rlist);
3484 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
3485 br_port_mc_router_state_change(p, false);
3487 /* don't allow timer refresh */
3488 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
3489 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3492 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
3494 struct net_bridge *br = p->br;
3495 unsigned long now = jiffies;
3498 spin_lock(&br->multicast_lock);
3499 if (p->multicast_router == val) {
3500 /* Refresh the temp router port timer */
3501 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
3502 mod_timer(&p->multicast_router_timer,
3503 now + br->multicast_querier_interval);
3508 case MDB_RTR_TYPE_DISABLED:
3509 p->multicast_router = MDB_RTR_TYPE_DISABLED;
3510 __del_port_router(p);
3511 del_timer(&p->multicast_router_timer);
3513 case MDB_RTR_TYPE_TEMP_QUERY:
3514 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3515 __del_port_router(p);
3517 case MDB_RTR_TYPE_PERM:
3518 p->multicast_router = MDB_RTR_TYPE_PERM;
3519 del_timer(&p->multicast_router_timer);
3520 br_multicast_add_router(br, p);
3522 case MDB_RTR_TYPE_TEMP:
3523 p->multicast_router = MDB_RTR_TYPE_TEMP;
3524 br_multicast_mark_router(br, p);
3531 spin_unlock(&br->multicast_lock);
3536 static void br_multicast_start_querier(struct net_bridge *br,
3537 struct bridge_mcast_own_query *query)
3539 struct net_bridge_port *port;
3541 __br_multicast_open(br, query);
3544 list_for_each_entry_rcu(port, &br->port_list, list) {
3545 if (port->state == BR_STATE_DISABLED ||
3546 port->state == BR_STATE_BLOCKING)
3549 if (query == &br->ip4_own_query)
3550 br_multicast_enable(&port->ip4_own_query);
3551 #if IS_ENABLED(CONFIG_IPV6)
3553 br_multicast_enable(&port->ip6_own_query);
3559 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
3560 struct netlink_ext_ack *extack)
3562 struct net_bridge_port *port;
3563 bool change_snoopers = false;
3566 spin_lock_bh(&br->multicast_lock);
3567 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
3570 err = br_mc_disabled_update(br->dev, val, extack);
3571 if (err == -EOPNOTSUPP)
3576 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
3577 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
3578 change_snoopers = true;
3582 if (!netif_running(br->dev))
3585 br_multicast_open(br);
3586 list_for_each_entry(port, &br->port_list, list)
3587 __br_multicast_enable_port(port);
3589 change_snoopers = true;
3592 spin_unlock_bh(&br->multicast_lock);
3594 /* br_multicast_join_snoopers has the potential to cause
3595 * an MLD Report/Leave to be delivered to br_multicast_rcv,
3596 * which would in turn call br_multicast_add_group, which would
3597 * attempt to acquire multicast_lock. This function should be
3598 * called after the lock has been released to avoid deadlocks on
3601 * br_multicast_leave_snoopers does not have the problem since
3602 * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
3603 * returns without calling br_multicast_ipv4/6_rcv if it's not
3604 * enabled. Moved both functions out just for symmetry.
3606 if (change_snoopers) {
3607 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
3608 br_multicast_join_snoopers(br);
3610 br_multicast_leave_snoopers(br);
3616 bool br_multicast_enabled(const struct net_device *dev)
3618 struct net_bridge *br = netdev_priv(dev);
3620 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
3622 EXPORT_SYMBOL_GPL(br_multicast_enabled);
3624 bool br_multicast_router(const struct net_device *dev)
3626 struct net_bridge *br = netdev_priv(dev);
3629 spin_lock_bh(&br->multicast_lock);
3630 is_router = br_multicast_is_router(br);
3631 spin_unlock_bh(&br->multicast_lock);
3634 EXPORT_SYMBOL_GPL(br_multicast_router);
3636 int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
3638 unsigned long max_delay;
3642 spin_lock_bh(&br->multicast_lock);
3643 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
3646 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
3650 max_delay = br->multicast_query_response_interval;
3652 if (!timer_pending(&br->ip4_other_query.timer))
3653 br->ip4_other_query.delay_time = jiffies + max_delay;
3655 br_multicast_start_querier(br, &br->ip4_own_query);
3657 #if IS_ENABLED(CONFIG_IPV6)
3658 if (!timer_pending(&br->ip6_other_query.timer))
3659 br->ip6_other_query.delay_time = jiffies + max_delay;
3661 br_multicast_start_querier(br, &br->ip6_own_query);
3665 spin_unlock_bh(&br->multicast_lock);
3670 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
3672 /* Currently we support only version 2 and 3 */
3681 spin_lock_bh(&br->multicast_lock);
3682 br->multicast_igmp_version = val;
3683 spin_unlock_bh(&br->multicast_lock);
3688 #if IS_ENABLED(CONFIG_IPV6)
3689 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
3691 /* Currently we support version 1 and 2 */
3700 spin_lock_bh(&br->multicast_lock);
3701 br->multicast_mld_version = val;
3702 spin_unlock_bh(&br->multicast_lock);
3709 * br_multicast_list_adjacent - Returns snooped multicast addresses
3710 * @dev: The bridge port adjacent to which to retrieve addresses
3711 * @br_ip_list: The list to store found, snooped multicast IP addresses in
3713 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
3714 * snooping feature on all bridge ports of dev's bridge device, excluding
3715 * the addresses from dev itself.
3717 * Returns the number of items added to br_ip_list.
3720 * - br_ip_list needs to be initialized by caller
3721 * - br_ip_list might contain duplicates in the end
3722 * (needs to be taken care of by caller)
3723 * - br_ip_list needs to be freed by caller
3725 int br_multicast_list_adjacent(struct net_device *dev,
3726 struct list_head *br_ip_list)
3728 struct net_bridge *br;
3729 struct net_bridge_port *port;
3730 struct net_bridge_port_group *group;
3731 struct br_ip_list *entry;
3735 if (!br_ip_list || !netif_is_bridge_port(dev))
3738 port = br_port_get_rcu(dev);
3739 if (!port || !port->br)
3744 list_for_each_entry_rcu(port, &br->port_list, list) {
3745 if (!port->dev || port->dev == dev)
3748 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
3749 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3753 entry->addr = group->key.addr;
3754 list_add(&entry->list, br_ip_list);
3763 EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
3766 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
3767 * @dev: The bridge port providing the bridge on which to check for a querier
3768 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
3770 * Checks whether the given interface has a bridge on top and if so returns
3771 * true if a valid querier exists anywhere on the bridged link layer.
3772 * Otherwise returns false.
3774 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
3776 struct net_bridge *br;
3777 struct net_bridge_port *port;
3782 if (!netif_is_bridge_port(dev))
3785 port = br_port_get_rcu(dev);
3786 if (!port || !port->br)
3791 memset(ð, 0, sizeof(eth));
3792 eth.h_proto = htons(proto);
3794 ret = br_multicast_querier_exists(br, ð, NULL);
3800 EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
3803 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
3804 * @dev: The bridge port adjacent to which to check for a querier
3805 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
3807 * Checks whether the given interface has a bridge on top and if so returns
3808 * true if a selected querier is behind one of the other ports of this
3809 * bridge. Otherwise returns false.
3811 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
3813 struct net_bridge *br;
3814 struct net_bridge_port *port;
3818 if (!netif_is_bridge_port(dev))
3821 port = br_port_get_rcu(dev);
3822 if (!port || !port->br)
3829 if (!timer_pending(&br->ip4_other_query.timer) ||
3830 rcu_dereference(br->ip4_querier.port) == port)
3833 #if IS_ENABLED(CONFIG_IPV6)
3835 if (!timer_pending(&br->ip6_other_query.timer) ||
3836 rcu_dereference(br->ip6_querier.port) == port)
3849 EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
3851 static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
3852 const struct sk_buff *skb, u8 type, u8 dir)
3854 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
3855 __be16 proto = skb->protocol;
3858 u64_stats_update_begin(&pstats->syncp);
3860 case htons(ETH_P_IP):
3861 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
3863 case IGMP_HOST_MEMBERSHIP_REPORT:
3864 pstats->mstats.igmp_v1reports[dir]++;
3866 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3867 pstats->mstats.igmp_v2reports[dir]++;
3869 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3870 pstats->mstats.igmp_v3reports[dir]++;
3872 case IGMP_HOST_MEMBERSHIP_QUERY:
3873 if (t_len != sizeof(struct igmphdr)) {
3874 pstats->mstats.igmp_v3queries[dir]++;
3876 unsigned int offset = skb_transport_offset(skb);
3877 struct igmphdr *ih, _ihdr;
3879 ih = skb_header_pointer(skb, offset,
3880 sizeof(_ihdr), &_ihdr);
3884 pstats->mstats.igmp_v1queries[dir]++;
3886 pstats->mstats.igmp_v2queries[dir]++;
3889 case IGMP_HOST_LEAVE_MESSAGE:
3890 pstats->mstats.igmp_leaves[dir]++;
3894 #if IS_ENABLED(CONFIG_IPV6)
3895 case htons(ETH_P_IPV6):
3896 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
3897 sizeof(struct ipv6hdr);
3898 t_len -= skb_network_header_len(skb);
3900 case ICMPV6_MGM_REPORT:
3901 pstats->mstats.mld_v1reports[dir]++;
3903 case ICMPV6_MLD2_REPORT:
3904 pstats->mstats.mld_v2reports[dir]++;
3906 case ICMPV6_MGM_QUERY:
3907 if (t_len != sizeof(struct mld_msg))
3908 pstats->mstats.mld_v2queries[dir]++;
3910 pstats->mstats.mld_v1queries[dir]++;
3912 case ICMPV6_MGM_REDUCTION:
3913 pstats->mstats.mld_leaves[dir]++;
3917 #endif /* CONFIG_IPV6 */
3919 u64_stats_update_end(&pstats->syncp);
3922 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
3923 const struct sk_buff *skb, u8 type, u8 dir)
3925 struct bridge_mcast_stats __percpu *stats;
3927 /* if multicast_disabled is true then igmp type can't be set */
3928 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
3932 stats = p->mcast_stats;
3934 stats = br->mcast_stats;
3935 if (WARN_ON(!stats))
3938 br_mcast_stats_add(stats, skb, type, dir);
3941 int br_multicast_init_stats(struct net_bridge *br)
3943 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
3944 if (!br->mcast_stats)
3950 void br_multicast_uninit_stats(struct net_bridge *br)
3952 free_percpu(br->mcast_stats);
3955 /* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
3956 static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
3958 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
3959 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
3962 void br_multicast_get_stats(const struct net_bridge *br,
3963 const struct net_bridge_port *p,
3964 struct br_mcast_stats *dest)
3966 struct bridge_mcast_stats __percpu *stats;
3967 struct br_mcast_stats tdst;
3970 memset(dest, 0, sizeof(*dest));
3972 stats = p->mcast_stats;
3974 stats = br->mcast_stats;
3975 if (WARN_ON(!stats))
3978 memset(&tdst, 0, sizeof(tdst));
3979 for_each_possible_cpu(i) {
3980 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
3981 struct br_mcast_stats temp;
3985 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
3986 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
3987 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
3989 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
3990 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
3991 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
3992 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
3993 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
3994 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
3995 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
3996 tdst.igmp_parse_errors += temp.igmp_parse_errors;
3998 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
3999 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
4000 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
4001 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
4002 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
4003 tdst.mld_parse_errors += temp.mld_parse_errors;
4005 memcpy(dest, &tdst, sizeof(*dest));
4008 int br_mdb_hash_init(struct net_bridge *br)
4012 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
4016 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
4018 rhashtable_destroy(&br->sg_port_tbl);
4025 void br_mdb_hash_fini(struct net_bridge *br)
4027 rhashtable_destroy(&br->sg_port_tbl);
4028 rhashtable_destroy(&br->mdb_hash_tbl);