2 * Bridge multicast support.
4 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
13 #include <linux/err.h>
14 #include <linux/if_ether.h>
15 #include <linux/igmp.h>
16 #include <linux/jhash.h>
17 #include <linux/kernel.h>
18 #include <linux/log2.h>
19 #include <linux/netdevice.h>
20 #include <linux/netfilter_bridge.h>
21 #include <linux/random.h>
22 #include <linux/rculist.h>
23 #include <linux/skbuff.h>
24 #include <linux/slab.h>
25 #include <linux/timer.h>
28 #include "br_private.h"
30 static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
32 return jhash_1word(mdb->secret, (u32)ip) & (mdb->max - 1);
35 static struct net_bridge_mdb_entry *__br_mdb_ip_get(
36 struct net_bridge_mdb_htable *mdb, __be32 dst, int hash)
38 struct net_bridge_mdb_entry *mp;
41 hlist_for_each_entry_rcu(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
49 static struct net_bridge_mdb_entry *br_mdb_ip_get(
50 struct net_bridge_mdb_htable *mdb, __be32 dst)
52 return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst));
55 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
58 struct net_bridge_mdb_htable *mdb = br->mdb;
60 if (!mdb || br->multicast_disabled)
63 switch (skb->protocol) {
65 if (BR_INPUT_SKB_CB(skb)->igmp)
67 return br_mdb_ip_get(mdb, ip_hdr(skb)->daddr);
73 static void br_mdb_free(struct rcu_head *head)
75 struct net_bridge_mdb_htable *mdb =
76 container_of(head, struct net_bridge_mdb_htable, rcu);
77 struct net_bridge_mdb_htable *old = mdb->old;
84 static int br_mdb_copy(struct net_bridge_mdb_htable *new,
85 struct net_bridge_mdb_htable *old,
88 struct net_bridge_mdb_entry *mp;
94 for (i = 0; i < old->max; i++)
95 hlist_for_each_entry(mp, p, &old->mhash[i], hlist[old->ver])
96 hlist_add_head(&mp->hlist[new->ver],
97 &new->mhash[br_ip_hash(new, mp->addr)]);
103 for (i = 0; i < new->max; i++) {
105 hlist_for_each_entry(mp, p, &new->mhash[i], hlist[new->ver])
111 return maxlen > elasticity ? -EINVAL : 0;
114 static void br_multicast_free_pg(struct rcu_head *head)
116 struct net_bridge_port_group *p =
117 container_of(head, struct net_bridge_port_group, rcu);
122 static void br_multicast_free_group(struct rcu_head *head)
124 struct net_bridge_mdb_entry *mp =
125 container_of(head, struct net_bridge_mdb_entry, rcu);
130 static void br_multicast_group_expired(unsigned long data)
132 struct net_bridge_mdb_entry *mp = (void *)data;
133 struct net_bridge *br = mp->br;
134 struct net_bridge_mdb_htable *mdb;
136 spin_lock(&br->multicast_lock);
137 if (!netif_running(br->dev) || timer_pending(&mp->timer))
140 if (!hlist_unhashed(&mp->mglist))
141 hlist_del_init(&mp->mglist);
147 hlist_del_rcu(&mp->hlist[mdb->ver]);
150 del_timer(&mp->query_timer);
151 call_rcu_bh(&mp->rcu, br_multicast_free_group);
154 spin_unlock(&br->multicast_lock);
157 static void br_multicast_del_pg(struct net_bridge *br,
158 struct net_bridge_port_group *pg)
160 struct net_bridge_mdb_htable *mdb = br->mdb;
161 struct net_bridge_mdb_entry *mp;
162 struct net_bridge_port_group *p;
163 struct net_bridge_port_group **pp;
165 mp = br_mdb_ip_get(mdb, pg->addr);
169 for (pp = &mp->ports; (p = *pp); pp = &p->next) {
174 hlist_del_init(&p->mglist);
175 del_timer(&p->timer);
176 del_timer(&p->query_timer);
177 call_rcu_bh(&p->rcu, br_multicast_free_pg);
179 if (!mp->ports && hlist_unhashed(&mp->mglist) &&
180 netif_running(br->dev))
181 mod_timer(&mp->timer, jiffies);
189 static void br_multicast_port_group_expired(unsigned long data)
191 struct net_bridge_port_group *pg = (void *)data;
192 struct net_bridge *br = pg->port->br;
194 spin_lock(&br->multicast_lock);
195 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
196 hlist_unhashed(&pg->mglist))
199 br_multicast_del_pg(br, pg);
202 spin_unlock(&br->multicast_lock);
205 static int br_mdb_rehash(struct net_bridge_mdb_htable **mdbp, int max,
208 struct net_bridge_mdb_htable *old = *mdbp;
209 struct net_bridge_mdb_htable *mdb;
212 mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC);
219 mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC);
225 mdb->size = old ? old->size : 0;
226 mdb->ver = old ? old->ver ^ 1 : 0;
228 if (!old || elasticity)
229 get_random_bytes(&mdb->secret, sizeof(mdb->secret));
231 mdb->secret = old->secret;
236 err = br_mdb_copy(mdb, old, elasticity);
243 call_rcu_bh(&mdb->rcu, br_mdb_free);
246 rcu_assign_pointer(*mdbp, mdb);
251 static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
259 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
264 skb->protocol = htons(ETH_P_IP);
266 skb_reset_mac_header(skb);
269 memcpy(eth->h_source, br->dev->dev_addr, 6);
272 eth->h_dest[2] = 0x5e;
276 eth->h_proto = htons(ETH_P_IP);
277 skb_put(skb, sizeof(*eth));
279 skb_set_network_header(skb, skb->len);
285 iph->tot_len = htons(sizeof(*iph) + sizeof(*ih) + 4);
287 iph->frag_off = htons(IP_DF);
289 iph->protocol = IPPROTO_IGMP;
291 iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
292 ((u8 *)&iph[1])[0] = IPOPT_RA;
293 ((u8 *)&iph[1])[1] = 4;
294 ((u8 *)&iph[1])[2] = 0;
295 ((u8 *)&iph[1])[3] = 0;
299 skb_set_transport_header(skb, skb->len);
301 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
302 ih->code = (group ? br->multicast_last_member_interval :
303 br->multicast_query_response_interval) /
304 (HZ / IGMP_TIMER_SCALE);
307 ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr));
308 skb_put(skb, sizeof(*ih));
310 __skb_pull(skb, sizeof(*eth));
316 static void br_multicast_send_group_query(struct net_bridge_mdb_entry *mp)
318 struct net_bridge *br = mp->br;
321 skb = br_multicast_alloc_query(br, mp->addr);
328 if (++mp->queries_sent < br->multicast_last_member_count)
329 mod_timer(&mp->query_timer,
330 jiffies + br->multicast_last_member_interval);
333 static void br_multicast_group_query_expired(unsigned long data)
335 struct net_bridge_mdb_entry *mp = (void *)data;
336 struct net_bridge *br = mp->br;
338 spin_lock(&br->multicast_lock);
339 if (!netif_running(br->dev) || hlist_unhashed(&mp->mglist) ||
340 mp->queries_sent >= br->multicast_last_member_count)
343 br_multicast_send_group_query(mp);
346 spin_unlock(&br->multicast_lock);
349 static void br_multicast_send_port_group_query(struct net_bridge_port_group *pg)
351 struct net_bridge_port *port = pg->port;
352 struct net_bridge *br = port->br;
355 skb = br_multicast_alloc_query(br, pg->addr);
359 br_deliver(port, skb);
362 if (++pg->queries_sent < br->multicast_last_member_count)
363 mod_timer(&pg->query_timer,
364 jiffies + br->multicast_last_member_interval);
367 static void br_multicast_port_group_query_expired(unsigned long data)
369 struct net_bridge_port_group *pg = (void *)data;
370 struct net_bridge_port *port = pg->port;
371 struct net_bridge *br = port->br;
373 spin_lock(&br->multicast_lock);
374 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
375 pg->queries_sent >= br->multicast_last_member_count)
378 br_multicast_send_port_group_query(pg);
381 spin_unlock(&br->multicast_lock);
384 static struct net_bridge_mdb_entry *br_multicast_get_group(
385 struct net_bridge *br, struct net_bridge_port *port, __be32 group,
388 struct net_bridge_mdb_htable *mdb = br->mdb;
389 struct net_bridge_mdb_entry *mp;
390 struct hlist_node *p;
396 hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
398 if (unlikely(group == mp->addr)) {
406 if (unlikely(count > br->hash_elasticity && count)) {
408 printk(KERN_INFO "%s: Multicast hash table "
409 "chain limit reached: %s\n",
410 br->dev->name, port ? port->dev->name :
413 elasticity = br->hash_elasticity;
416 if (mdb->size >= max) {
418 if (unlikely(max >= br->hash_max)) {
419 printk(KERN_WARNING "%s: Multicast hash table maximum "
420 "reached, disabling snooping: %s, %d\n",
421 br->dev->name, port ? port->dev->name :
426 br->multicast_disabled = 1;
431 if (max > mdb->max || elasticity) {
434 printk(KERN_INFO "%s: Multicast hash table "
436 br->dev->name, port ? port->dev->name :
442 err = br_mdb_rehash(&br->mdb, max, elasticity);
444 printk(KERN_WARNING "%s: Cannot rehash multicast "
445 "hash table, disabling snooping: "
447 br->dev->name, port ? port->dev->name :
464 static struct net_bridge_mdb_entry *br_multicast_new_group(
465 struct net_bridge *br, struct net_bridge_port *port, __be32 group)
467 struct net_bridge_mdb_htable *mdb = br->mdb;
468 struct net_bridge_mdb_entry *mp;
472 if (br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0))
477 hash = br_ip_hash(mdb, group);
478 mp = br_multicast_get_group(br, port, group, hash);
479 switch (PTR_ERR(mp)) {
486 hash = br_ip_hash(mdb, group);
493 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
499 setup_timer(&mp->timer, br_multicast_group_expired,
501 setup_timer(&mp->query_timer, br_multicast_group_query_expired,
504 hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]);
511 static int br_multicast_add_group(struct net_bridge *br,
512 struct net_bridge_port *port, __be32 group)
514 struct net_bridge_mdb_entry *mp;
515 struct net_bridge_port_group *p;
516 struct net_bridge_port_group **pp;
517 unsigned long now = jiffies;
520 if (ipv4_is_local_multicast(group))
523 spin_lock(&br->multicast_lock);
524 if (!netif_running(br->dev) ||
525 (port && port->state == BR_STATE_DISABLED))
528 mp = br_multicast_new_group(br, port, group);
530 if (unlikely(IS_ERR(mp) || !mp))
534 hlist_add_head(&mp->mglist, &br->mglist);
535 mod_timer(&mp->timer, now + br->multicast_membership_interval);
539 for (pp = &mp->ports; (p = *pp); pp = &p->next) {
542 if ((unsigned long)p->port < (unsigned long)port)
546 p = kzalloc(sizeof(*p), GFP_ATOMIC);
554 hlist_add_head(&p->mglist, &port->mglist);
555 setup_timer(&p->timer, br_multicast_port_group_expired,
557 setup_timer(&p->query_timer, br_multicast_port_group_query_expired,
560 rcu_assign_pointer(*pp, p);
563 mod_timer(&p->timer, now + br->multicast_membership_interval);
568 spin_unlock(&br->multicast_lock);
572 static void br_multicast_router_expired(unsigned long data)
574 struct net_bridge_port *port = (void *)data;
575 struct net_bridge *br = port->br;
577 spin_lock(&br->multicast_lock);
578 if (port->multicast_router != 1 ||
579 timer_pending(&port->multicast_router_timer) ||
580 hlist_unhashed(&port->rlist))
583 hlist_del_init_rcu(&port->rlist);
586 spin_unlock(&br->multicast_lock);
589 static void br_multicast_local_router_expired(unsigned long data)
593 static void br_multicast_send_query(struct net_bridge *br,
594 struct net_bridge_port *port, u32 sent)
599 if (!netif_running(br->dev) || br->multicast_disabled ||
600 timer_pending(&br->multicast_querier_timer))
603 skb = br_multicast_alloc_query(br, 0);
608 __skb_push(skb, sizeof(struct ethhdr));
609 skb->dev = port->dev;
610 NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
617 time += sent < br->multicast_startup_query_count ?
618 br->multicast_startup_query_interval :
619 br->multicast_query_interval;
620 mod_timer(port ? &port->multicast_query_timer :
621 &br->multicast_query_timer, time);
624 static void br_multicast_port_query_expired(unsigned long data)
626 struct net_bridge_port *port = (void *)data;
627 struct net_bridge *br = port->br;
629 spin_lock(&br->multicast_lock);
630 if (port->state == BR_STATE_DISABLED ||
631 port->state == BR_STATE_BLOCKING)
634 if (port->multicast_startup_queries_sent <
635 br->multicast_startup_query_count)
636 port->multicast_startup_queries_sent++;
638 br_multicast_send_query(port->br, port,
639 port->multicast_startup_queries_sent);
642 spin_unlock(&br->multicast_lock);
645 void br_multicast_add_port(struct net_bridge_port *port)
647 port->multicast_router = 1;
649 setup_timer(&port->multicast_router_timer, br_multicast_router_expired,
650 (unsigned long)port);
651 setup_timer(&port->multicast_query_timer,
652 br_multicast_port_query_expired, (unsigned long)port);
655 void br_multicast_del_port(struct net_bridge_port *port)
657 del_timer_sync(&port->multicast_router_timer);
660 static void __br_multicast_enable_port(struct net_bridge_port *port)
662 port->multicast_startup_queries_sent = 0;
664 if (try_to_del_timer_sync(&port->multicast_query_timer) >= 0 ||
665 del_timer(&port->multicast_query_timer))
666 mod_timer(&port->multicast_query_timer, jiffies);
669 void br_multicast_enable_port(struct net_bridge_port *port)
671 struct net_bridge *br = port->br;
673 spin_lock(&br->multicast_lock);
674 if (br->multicast_disabled || !netif_running(br->dev))
677 __br_multicast_enable_port(port);
680 spin_unlock(&br->multicast_lock);
683 void br_multicast_disable_port(struct net_bridge_port *port)
685 struct net_bridge *br = port->br;
686 struct net_bridge_port_group *pg;
687 struct hlist_node *p, *n;
689 spin_lock(&br->multicast_lock);
690 hlist_for_each_entry_safe(pg, p, n, &port->mglist, mglist)
691 br_multicast_del_pg(br, pg);
693 if (!hlist_unhashed(&port->rlist))
694 hlist_del_init_rcu(&port->rlist);
695 del_timer(&port->multicast_router_timer);
696 del_timer(&port->multicast_query_timer);
697 spin_unlock(&br->multicast_lock);
700 static int br_multicast_igmp3_report(struct net_bridge *br,
701 struct net_bridge_port *port,
704 struct igmpv3_report *ih;
705 struct igmpv3_grec *grec;
713 if (!pskb_may_pull(skb, sizeof(*ih)))
716 ih = igmpv3_report_hdr(skb);
717 num = ntohs(ih->ngrec);
720 for (i = 0; i < num; i++) {
721 len += sizeof(*grec);
722 if (!pskb_may_pull(skb, len))
725 grec = (void *)(skb->data + len);
726 group = grec->grec_mca;
727 type = grec->grec_type;
729 len += grec->grec_nsrcs * 4;
730 if (!pskb_may_pull(skb, len))
733 /* We treat this as an IGMPv2 report for now. */
735 case IGMPV3_MODE_IS_INCLUDE:
736 case IGMPV3_MODE_IS_EXCLUDE:
737 case IGMPV3_CHANGE_TO_INCLUDE:
738 case IGMPV3_CHANGE_TO_EXCLUDE:
739 case IGMPV3_ALLOW_NEW_SOURCES:
740 case IGMPV3_BLOCK_OLD_SOURCES:
747 err = br_multicast_add_group(br, port, group);
755 static void br_multicast_add_router(struct net_bridge *br,
756 struct net_bridge_port *port)
758 struct hlist_node *p;
759 struct hlist_node **h;
761 for (h = &br->router_list.first;
763 (unsigned long)container_of(p, struct net_bridge_port, rlist) >
768 port->rlist.pprev = h;
769 port->rlist.next = p;
770 rcu_assign_pointer(*h, &port->rlist);
772 p->pprev = &port->rlist.next;
775 static void br_multicast_mark_router(struct net_bridge *br,
776 struct net_bridge_port *port)
778 unsigned long now = jiffies;
781 if (br->multicast_router == 1)
782 mod_timer(&br->multicast_router_timer,
783 now + br->multicast_querier_interval);
787 if (port->multicast_router != 1)
790 if (!hlist_unhashed(&port->rlist))
793 br_multicast_add_router(br, port);
796 mod_timer(&port->multicast_router_timer,
797 now + br->multicast_querier_interval);
800 static void br_multicast_query_received(struct net_bridge *br,
801 struct net_bridge_port *port,
805 mod_timer(&br->multicast_querier_timer,
806 jiffies + br->multicast_querier_interval);
807 else if (timer_pending(&br->multicast_querier_timer))
810 br_multicast_mark_router(br, port);
813 static int br_multicast_query(struct net_bridge *br,
814 struct net_bridge_port *port,
817 struct iphdr *iph = ip_hdr(skb);
818 struct igmphdr *ih = igmp_hdr(skb);
819 struct net_bridge_mdb_entry *mp;
820 struct igmpv3_query *ih3;
821 struct net_bridge_port_group *p;
822 struct net_bridge_port_group **pp;
823 unsigned long max_delay;
824 unsigned long now = jiffies;
828 spin_lock(&br->multicast_lock);
829 if (!netif_running(br->dev) ||
830 (port && port->state == BR_STATE_DISABLED))
833 br_multicast_query_received(br, port, iph->saddr);
837 if (skb->len == sizeof(*ih)) {
838 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
845 if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) {
850 ih3 = igmpv3_query_hdr(skb);
854 max_delay = ih3->code ? 1 :
855 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE);
861 mp = br_mdb_ip_get(br->mdb, group);
865 max_delay *= br->multicast_last_member_count;
867 if (!hlist_unhashed(&mp->mglist) &&
868 (timer_pending(&mp->timer) ?
869 time_after(mp->timer.expires, now + max_delay) :
870 try_to_del_timer_sync(&mp->timer) >= 0))
871 mod_timer(&mp->timer, now + max_delay);
873 for (pp = &mp->ports; (p = *pp); pp = &p->next) {
874 if (timer_pending(&p->timer) ?
875 time_after(p->timer.expires, now + max_delay) :
876 try_to_del_timer_sync(&p->timer) >= 0)
877 mod_timer(&mp->timer, now + max_delay);
881 spin_unlock(&br->multicast_lock);
885 static void br_multicast_leave_group(struct net_bridge *br,
886 struct net_bridge_port *port,
889 struct net_bridge_mdb_htable *mdb;
890 struct net_bridge_mdb_entry *mp;
891 struct net_bridge_port_group *p;
895 if (ipv4_is_local_multicast(group))
898 spin_lock(&br->multicast_lock);
899 if (!netif_running(br->dev) ||
900 (port && port->state == BR_STATE_DISABLED) ||
901 timer_pending(&br->multicast_querier_timer))
905 mp = br_mdb_ip_get(mdb, group);
910 time = now + br->multicast_last_member_count *
911 br->multicast_last_member_interval;
914 if (!hlist_unhashed(&mp->mglist) &&
915 (timer_pending(&mp->timer) ?
916 time_after(mp->timer.expires, time) :
917 try_to_del_timer_sync(&mp->timer) >= 0)) {
918 mod_timer(&mp->timer, time);
920 mp->queries_sent = 0;
921 mod_timer(&mp->query_timer, now);
927 for (p = mp->ports; p; p = p->next) {
931 if (!hlist_unhashed(&p->mglist) &&
932 (timer_pending(&p->timer) ?
933 time_after(p->timer.expires, time) :
934 try_to_del_timer_sync(&p->timer) >= 0)) {
935 mod_timer(&p->timer, time);
938 mod_timer(&p->query_timer, now);
945 spin_unlock(&br->multicast_lock);
948 static int br_multicast_ipv4_rcv(struct net_bridge *br,
949 struct net_bridge_port *port,
952 struct sk_buff *skb2 = skb;
959 BR_INPUT_SKB_CB(skb)->igmp = 0;
960 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
962 /* We treat OOM as packet loss for now. */
963 if (!pskb_may_pull(skb, sizeof(*iph)))
968 if (iph->ihl < 5 || iph->version != 4)
971 if (!pskb_may_pull(skb, ip_hdrlen(skb)))
976 if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
979 if (iph->protocol != IPPROTO_IGMP)
982 len = ntohs(iph->tot_len);
983 if (skb->len < len || len < ip_hdrlen(skb))
986 if (skb->len > len) {
987 skb2 = skb_clone(skb, GFP_ATOMIC);
991 err = pskb_trim_rcsum(skb2, len);
996 len -= ip_hdrlen(skb2);
997 offset = skb_network_offset(skb2) + ip_hdrlen(skb2);
998 __skb_pull(skb2, offset);
999 skb_reset_transport_header(skb2);
1002 if (!pskb_may_pull(skb2, sizeof(*ih)))
1007 switch (skb2->ip_summed) {
1008 case CHECKSUM_COMPLETE:
1009 if (!csum_fold(skb2->csum))
1014 if (skb_checksum_complete(skb2))
1020 BR_INPUT_SKB_CB(skb)->igmp = 1;
1021 ih = igmp_hdr(skb2);
1024 case IGMP_HOST_MEMBERSHIP_REPORT:
1025 case IGMPV2_HOST_MEMBERSHIP_REPORT:
1026 BR_INPUT_SKB_CB(skb2)->mrouters_only = 1;
1027 err = br_multicast_add_group(br, port, ih->group);
1029 case IGMPV3_HOST_MEMBERSHIP_REPORT:
1030 err = br_multicast_igmp3_report(br, port, skb2);
1032 case IGMP_HOST_MEMBERSHIP_QUERY:
1033 err = br_multicast_query(br, port, skb2);
1035 case IGMP_HOST_LEAVE_MESSAGE:
1036 br_multicast_leave_group(br, port, ih->group);
1041 __skb_push(skb2, offset);
1047 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
1048 struct sk_buff *skb)
1050 if (br->multicast_disabled)
1053 switch (skb->protocol) {
1054 case htons(ETH_P_IP):
1055 return br_multicast_ipv4_rcv(br, port, skb);
1061 static void br_multicast_query_expired(unsigned long data)
1063 struct net_bridge *br = (void *)data;
1065 spin_lock(&br->multicast_lock);
1066 if (br->multicast_startup_queries_sent <
1067 br->multicast_startup_query_count)
1068 br->multicast_startup_queries_sent++;
1070 br_multicast_send_query(br, NULL, br->multicast_startup_queries_sent);
1072 spin_unlock(&br->multicast_lock);
1075 void br_multicast_init(struct net_bridge *br)
1077 br->hash_elasticity = 4;
1080 br->multicast_router = 1;
1081 br->multicast_last_member_count = 2;
1082 br->multicast_startup_query_count = 2;
1084 br->multicast_last_member_interval = HZ;
1085 br->multicast_query_response_interval = 10 * HZ;
1086 br->multicast_startup_query_interval = 125 * HZ / 4;
1087 br->multicast_query_interval = 125 * HZ;
1088 br->multicast_querier_interval = 255 * HZ;
1089 br->multicast_membership_interval = 260 * HZ;
1091 spin_lock_init(&br->multicast_lock);
1092 setup_timer(&br->multicast_router_timer,
1093 br_multicast_local_router_expired, 0);
1094 setup_timer(&br->multicast_querier_timer,
1095 br_multicast_local_router_expired, 0);
1096 setup_timer(&br->multicast_query_timer, br_multicast_query_expired,
1100 void br_multicast_open(struct net_bridge *br)
1102 br->multicast_startup_queries_sent = 0;
1104 if (br->multicast_disabled)
1107 mod_timer(&br->multicast_query_timer, jiffies);
1110 void br_multicast_stop(struct net_bridge *br)
1112 struct net_bridge_mdb_htable *mdb;
1113 struct net_bridge_mdb_entry *mp;
1114 struct hlist_node *p, *n;
1118 del_timer_sync(&br->multicast_router_timer);
1119 del_timer_sync(&br->multicast_querier_timer);
1120 del_timer_sync(&br->multicast_query_timer);
1122 spin_lock_bh(&br->multicast_lock);
1130 for (i = 0; i < mdb->max; i++) {
1131 hlist_for_each_entry_safe(mp, p, n, &mdb->mhash[i],
1133 del_timer(&mp->timer);
1134 del_timer(&mp->query_timer);
1135 call_rcu_bh(&mp->rcu, br_multicast_free_group);
1140 spin_unlock_bh(&br->multicast_lock);
1142 spin_lock_bh(&br->multicast_lock);
1147 call_rcu_bh(&mdb->rcu, br_mdb_free);
1150 spin_unlock_bh(&br->multicast_lock);
1153 int br_multicast_set_router(struct net_bridge *br, unsigned long val)
1157 spin_lock_bh(&br->multicast_lock);
1158 if (!netif_running(br->dev))
1164 del_timer(&br->multicast_router_timer);
1167 br->multicast_router = val;
1177 spin_unlock_bh(&br->multicast_lock);
1182 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
1184 struct net_bridge *br = p->br;
1187 spin_lock(&br->multicast_lock);
1188 if (!netif_running(br->dev) || p->state == BR_STATE_DISABLED)
1195 p->multicast_router = val;
1198 if (val < 2 && !hlist_unhashed(&p->rlist))
1199 hlist_del_init_rcu(&p->rlist);
1204 del_timer(&p->multicast_router_timer);
1209 br_multicast_add_router(br, p);
1218 spin_unlock(&br->multicast_lock);
1223 int br_multicast_toggle(struct net_bridge *br, unsigned long val)
1225 struct net_bridge_port *port;
1228 spin_lock(&br->multicast_lock);
1229 if (!netif_running(br->dev))
1233 if (br->multicast_disabled == !val)
1236 br->multicast_disabled = !val;
1237 if (br->multicast_disabled)
1244 br->multicast_disabled = !!val;
1248 err = br_mdb_rehash(&br->mdb, br->mdb->max,
1249 br->hash_elasticity);
1254 br_multicast_open(br);
1255 list_for_each_entry(port, &br->port_list, list) {
1256 if (port->state == BR_STATE_DISABLED ||
1257 port->state == BR_STATE_BLOCKING)
1260 __br_multicast_enable_port(port);
1264 spin_unlock(&br->multicast_lock);
1269 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val)
1274 spin_lock(&br->multicast_lock);
1275 if (!netif_running(br->dev))
1279 if (!is_power_of_2(val))
1281 if (br->mdb && val < br->mdb->size)
1297 err = br_mdb_rehash(&br->mdb, br->hash_max,
1298 br->hash_elasticity);
1304 spin_unlock(&br->multicast_lock);