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/netdevice.h>
19 #include <linux/netfilter_bridge.h>
20 #include <linux/random.h>
21 #include <linux/rculist.h>
22 #include <linux/skbuff.h>
23 #include <linux/slab.h>
24 #include <linux/timer.h>
27 #include "br_private.h"
29 static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
31 return jhash_1word(mdb->secret, (u32)ip) & (mdb->max - 1);
34 static struct net_bridge_mdb_entry *__br_mdb_ip_get(
35 struct net_bridge_mdb_htable *mdb, __be32 dst, int hash)
37 struct net_bridge_mdb_entry *mp;
40 hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
48 static struct net_bridge_mdb_entry *br_mdb_ip_get(
49 struct net_bridge_mdb_htable *mdb, __be32 dst)
51 return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst));
54 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
57 struct net_bridge_mdb_htable *mdb = br->mdb;
59 if (!mdb || br->multicast_disabled)
62 switch (skb->protocol) {
64 if (BR_INPUT_SKB_CB(skb)->igmp)
66 return br_mdb_ip_get(mdb, ip_hdr(skb)->daddr);
72 static void br_mdb_free(struct rcu_head *head)
74 struct net_bridge_mdb_htable *mdb =
75 container_of(head, struct net_bridge_mdb_htable, rcu);
76 struct net_bridge_mdb_htable *old = mdb->old;
83 static int br_mdb_copy(struct net_bridge_mdb_htable *new,
84 struct net_bridge_mdb_htable *old,
87 struct net_bridge_mdb_entry *mp;
93 for (i = 0; i < old->max; i++)
94 hlist_for_each_entry(mp, p, &old->mhash[i], hlist[old->ver])
95 hlist_add_head(&mp->hlist[new->ver],
96 &new->mhash[br_ip_hash(new, mp->addr)]);
102 for (i = 0; i < new->max; i++) {
104 hlist_for_each_entry(mp, p, &new->mhash[i], hlist[new->ver])
110 return maxlen > elasticity ? -EINVAL : 0;
113 static void br_multicast_free_pg(struct rcu_head *head)
115 struct net_bridge_port_group *p =
116 container_of(head, struct net_bridge_port_group, rcu);
121 static void br_multicast_free_group(struct rcu_head *head)
123 struct net_bridge_mdb_entry *mp =
124 container_of(head, struct net_bridge_mdb_entry, rcu);
129 static void br_multicast_group_expired(unsigned long data)
131 struct net_bridge_mdb_entry *mp = (void *)data;
132 struct net_bridge *br = mp->br;
133 struct net_bridge_mdb_htable *mdb;
135 spin_lock(&br->multicast_lock);
136 if (!netif_running(br->dev) || timer_pending(&mp->timer))
139 if (!hlist_unhashed(&mp->mglist))
140 hlist_del_init(&mp->mglist);
146 hlist_del_rcu(&mp->hlist[mdb->ver]);
149 del_timer(&mp->query_timer);
150 call_rcu_bh(&mp->rcu, br_multicast_free_group);
153 spin_unlock(&br->multicast_lock);
156 static void br_multicast_del_pg(struct net_bridge *br,
157 struct net_bridge_port_group *pg)
159 struct net_bridge_mdb_htable *mdb = br->mdb;
160 struct net_bridge_mdb_entry *mp;
161 struct net_bridge_port_group *p;
162 struct net_bridge_port_group **pp;
164 mp = br_mdb_ip_get(mdb, pg->addr);
168 for (pp = &mp->ports; (p = *pp); pp = &p->next) {
173 hlist_del_init(&p->mglist);
174 del_timer(&p->timer);
175 del_timer(&p->query_timer);
176 call_rcu_bh(&p->rcu, br_multicast_free_pg);
178 if (!mp->ports && hlist_unhashed(&mp->mglist) &&
179 netif_running(br->dev))
180 mod_timer(&mp->timer, jiffies);
188 static void br_multicast_port_group_expired(unsigned long data)
190 struct net_bridge_port_group *pg = (void *)data;
191 struct net_bridge *br = pg->port->br;
193 spin_lock(&br->multicast_lock);
194 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
195 hlist_unhashed(&pg->mglist))
198 br_multicast_del_pg(br, pg);
201 spin_unlock(&br->multicast_lock);
204 static int br_mdb_rehash(struct net_bridge_mdb_htable **mdbp, int max,
207 struct net_bridge_mdb_htable *old = *mdbp;
208 struct net_bridge_mdb_htable *mdb;
211 mdb = kmalloc(sizeof(*mdb), GFP_ATOMIC);
218 mdb->mhash = kzalloc(max * sizeof(*mdb->mhash), GFP_ATOMIC);
224 mdb->size = old ? old->size : 0;
225 mdb->ver = old ? old->ver ^ 1 : 0;
227 if (!old || elasticity)
228 get_random_bytes(&mdb->secret, sizeof(mdb->secret));
230 mdb->secret = old->secret;
235 err = br_mdb_copy(mdb, old, elasticity);
242 call_rcu_bh(&mdb->rcu, br_mdb_free);
245 rcu_assign_pointer(*mdbp, mdb);
250 static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
258 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
263 skb->protocol = htons(ETH_P_IP);
265 skb_reset_mac_header(skb);
268 memcpy(eth->h_source, br->dev->dev_addr, 6);
271 eth->h_dest[2] = 0x5e;
275 eth->h_proto = htons(ETH_P_IP);
276 skb_put(skb, sizeof(*eth));
278 skb_set_network_header(skb, skb->len);
284 iph->tot_len = htons(sizeof(*iph) + sizeof(*ih) + 4);
286 iph->frag_off = htons(IP_DF);
288 iph->protocol = IPPROTO_IGMP;
290 iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
291 ((u8 *)&iph[1])[0] = IPOPT_RA;
292 ((u8 *)&iph[1])[1] = 4;
293 ((u8 *)&iph[1])[2] = 0;
294 ((u8 *)&iph[1])[3] = 0;
298 skb_set_transport_header(skb, skb->len);
300 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
301 ih->code = (group ? br->multicast_last_member_interval :
302 br->multicast_query_response_interval) /
303 (HZ / IGMP_TIMER_SCALE);
306 ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr));
307 skb_put(skb, sizeof(*ih));
309 __skb_pull(skb, sizeof(*eth));
315 static void br_multicast_send_group_query(struct net_bridge_mdb_entry *mp)
317 struct net_bridge *br = mp->br;
320 skb = br_multicast_alloc_query(br, mp->addr);
327 if (++mp->queries_sent < br->multicast_last_member_count)
328 mod_timer(&mp->query_timer,
329 jiffies + br->multicast_last_member_interval);
332 static void br_multicast_group_query_expired(unsigned long data)
334 struct net_bridge_mdb_entry *mp = (void *)data;
335 struct net_bridge *br = mp->br;
337 spin_lock(&br->multicast_lock);
338 if (!netif_running(br->dev) || hlist_unhashed(&mp->mglist) ||
339 mp->queries_sent >= br->multicast_last_member_count)
342 br_multicast_send_group_query(mp);
345 spin_unlock(&br->multicast_lock);
348 static void br_multicast_send_port_group_query(struct net_bridge_port_group *pg)
350 struct net_bridge_port *port = pg->port;
351 struct net_bridge *br = port->br;
354 skb = br_multicast_alloc_query(br, pg->addr);
358 br_deliver(port, skb);
361 if (++pg->queries_sent < br->multicast_last_member_count)
362 mod_timer(&pg->query_timer,
363 jiffies + br->multicast_last_member_interval);
366 static void br_multicast_port_group_query_expired(unsigned long data)
368 struct net_bridge_port_group *pg = (void *)data;
369 struct net_bridge_port *port = pg->port;
370 struct net_bridge *br = port->br;
372 spin_lock(&br->multicast_lock);
373 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
374 pg->queries_sent >= br->multicast_last_member_count)
377 br_multicast_send_port_group_query(pg);
380 spin_unlock(&br->multicast_lock);
383 static struct net_bridge_mdb_entry *br_multicast_get_group(
384 struct net_bridge *br, struct net_bridge_port *port, __be32 group,
387 struct net_bridge_mdb_htable *mdb = br->mdb;
388 struct net_bridge_mdb_entry *mp;
389 struct hlist_node *p;
395 hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
397 if (unlikely(group == mp->addr)) {
405 if (unlikely(count > br->hash_elasticity && count)) {
407 printk(KERN_INFO "%s: Multicast hash table "
408 "chain limit reached: %s\n",
409 br->dev->name, port ? port->dev->name :
412 elasticity = br->hash_elasticity;
415 if (mdb->size >= max) {
417 if (unlikely(max >= br->hash_max)) {
418 printk(KERN_WARNING "%s: Multicast hash table maximum "
419 "reached, disabling snooping: %s, %d\n",
420 br->dev->name, port ? port->dev->name :
425 br->multicast_disabled = 1;
430 if (max > mdb->max || elasticity) {
433 printk(KERN_INFO "%s: Multicast hash table "
435 br->dev->name, port ? port->dev->name :
441 err = br_mdb_rehash(&br->mdb, max, elasticity);
443 printk(KERN_WARNING "%s: Cannot rehash multicast "
444 "hash table, disabling snooping: "
446 br->dev->name, port ? port->dev->name :
463 static struct net_bridge_mdb_entry *br_multicast_new_group(
464 struct net_bridge *br, struct net_bridge_port *port, __be32 group)
466 struct net_bridge_mdb_htable *mdb = br->mdb;
467 struct net_bridge_mdb_entry *mp;
471 if (br_mdb_rehash(&br->mdb, BR_HASH_SIZE, 0))
476 hash = br_ip_hash(mdb, group);
477 mp = br_multicast_get_group(br, port, group, hash);
478 switch (PTR_ERR(mp)) {
485 hash = br_ip_hash(mdb, group);
492 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
498 setup_timer(&mp->timer, br_multicast_group_expired,
500 setup_timer(&mp->query_timer, br_multicast_group_query_expired,
503 hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]);
510 static int br_multicast_add_group(struct net_bridge *br,
511 struct net_bridge_port *port, __be32 group)
513 struct net_bridge_mdb_entry *mp;
514 struct net_bridge_port_group *p;
515 struct net_bridge_port_group **pp;
516 unsigned long now = jiffies;
519 if (ipv4_is_local_multicast(group))
522 spin_lock(&br->multicast_lock);
523 if (!netif_running(br->dev) ||
524 (port && port->state == BR_STATE_DISABLED))
527 mp = br_multicast_new_group(br, port, group);
529 if (unlikely(IS_ERR(mp) || !mp))
533 hlist_add_head(&mp->mglist, &br->mglist);
534 mod_timer(&mp->timer, now + br->multicast_membership_interval);
538 for (pp = &mp->ports; (p = *pp); pp = &p->next) {
541 if ((unsigned long)p->port < (unsigned long)port)
545 p = kzalloc(sizeof(*p), GFP_ATOMIC);
553 hlist_add_head(&p->mglist, &port->mglist);
554 setup_timer(&p->timer, br_multicast_port_group_expired,
556 setup_timer(&p->query_timer, br_multicast_port_group_query_expired,
559 rcu_assign_pointer(*pp, p);
562 mod_timer(&p->timer, now + br->multicast_membership_interval);
567 spin_unlock(&br->multicast_lock);
571 static void br_multicast_router_expired(unsigned long data)
573 struct net_bridge_port *port = (void *)data;
574 struct net_bridge *br = port->br;
576 spin_lock(&br->multicast_lock);
577 if (port->multicast_router != 1 ||
578 timer_pending(&port->multicast_router_timer) ||
579 hlist_unhashed(&port->rlist))
582 hlist_del_init_rcu(&port->rlist);
585 spin_unlock(&br->multicast_lock);
588 static void br_multicast_local_router_expired(unsigned long data)
592 static void br_multicast_send_query(struct net_bridge *br,
593 struct net_bridge_port *port, u32 sent)
598 if (!netif_running(br->dev) || br->multicast_disabled ||
599 timer_pending(&br->multicast_querier_timer))
602 skb = br_multicast_alloc_query(br, 0);
607 __skb_push(skb, sizeof(struct ethhdr));
608 skb->dev = port->dev;
609 NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
616 time += sent < br->multicast_startup_query_count ?
617 br->multicast_startup_query_interval :
618 br->multicast_query_interval;
619 mod_timer(port ? &port->multicast_query_timer :
620 &br->multicast_query_timer, time);
623 static void br_multicast_port_query_expired(unsigned long data)
625 struct net_bridge_port *port = (void *)data;
626 struct net_bridge *br = port->br;
628 spin_lock(&br->multicast_lock);
629 if (port && (port->state == BR_STATE_DISABLED ||
630 port->state == BR_STATE_BLOCKING))
633 if (port->multicast_startup_queries_sent <
634 br->multicast_startup_query_count)
635 port->multicast_startup_queries_sent++;
637 br_multicast_send_query(port->br, port,
638 port->multicast_startup_queries_sent);
641 spin_unlock(&br->multicast_lock);
644 void br_multicast_add_port(struct net_bridge_port *port)
646 port->multicast_router = 1;
648 setup_timer(&port->multicast_router_timer, br_multicast_router_expired,
649 (unsigned long)port);
650 setup_timer(&port->multicast_query_timer,
651 br_multicast_port_query_expired, (unsigned long)port);
654 void br_multicast_del_port(struct net_bridge_port *port)
656 del_timer_sync(&port->multicast_router_timer);
659 static void __br_multicast_enable_port(struct net_bridge_port *port)
661 port->multicast_startup_queries_sent = 0;
663 if (try_to_del_timer_sync(&port->multicast_query_timer) >= 0 ||
664 del_timer(&port->multicast_query_timer))
665 mod_timer(&port->multicast_query_timer, jiffies);
668 void br_multicast_enable_port(struct net_bridge_port *port)
670 struct net_bridge *br = port->br;
672 spin_lock(&br->multicast_lock);
673 if (br->multicast_disabled || !netif_running(br->dev))
676 __br_multicast_enable_port(port);
679 spin_unlock(&br->multicast_lock);
682 void br_multicast_disable_port(struct net_bridge_port *port)
684 struct net_bridge *br = port->br;
685 struct net_bridge_port_group *pg;
686 struct hlist_node *p, *n;
688 spin_lock(&br->multicast_lock);
689 hlist_for_each_entry_safe(pg, p, n, &port->mglist, mglist)
690 br_multicast_del_pg(br, pg);
692 if (!hlist_unhashed(&port->rlist))
693 hlist_del_init_rcu(&port->rlist);
694 del_timer(&port->multicast_router_timer);
695 del_timer(&port->multicast_query_timer);
696 spin_unlock(&br->multicast_lock);
699 static int br_multicast_igmp3_report(struct net_bridge *br,
700 struct net_bridge_port *port,
703 struct igmpv3_report *ih;
704 struct igmpv3_grec *grec;
712 if (!pskb_may_pull(skb, sizeof(*ih)))
715 ih = igmpv3_report_hdr(skb);
716 num = ntohs(ih->ngrec);
719 for (i = 0; i < num; i++) {
720 len += sizeof(*grec);
721 if (!pskb_may_pull(skb, len))
724 grec = (void *)(skb->data + len);
725 group = grec->grec_mca;
726 type = grec->grec_type;
728 len += grec->grec_nsrcs * 4;
729 if (!pskb_may_pull(skb, len))
732 /* We treat this as an IGMPv2 report for now. */
734 case IGMPV3_MODE_IS_INCLUDE:
735 case IGMPV3_MODE_IS_EXCLUDE:
736 case IGMPV3_CHANGE_TO_INCLUDE:
737 case IGMPV3_CHANGE_TO_EXCLUDE:
738 case IGMPV3_ALLOW_NEW_SOURCES:
739 case IGMPV3_BLOCK_OLD_SOURCES:
746 err = br_multicast_add_group(br, port, group);
754 static void br_multicast_add_router(struct net_bridge *br,
755 struct net_bridge_port *port)
757 struct hlist_node *p;
758 struct hlist_node **h;
760 for (h = &br->router_list.first;
762 (unsigned long)container_of(p, struct net_bridge_port, rlist) >
767 port->rlist.pprev = h;
768 port->rlist.next = p;
769 rcu_assign_pointer(*h, &port->rlist);
771 p->pprev = &port->rlist.next;
774 static void br_multicast_mark_router(struct net_bridge *br,
775 struct net_bridge_port *port)
777 unsigned long now = jiffies;
780 if (br->multicast_router == 1)
781 mod_timer(&br->multicast_router_timer,
782 now + br->multicast_querier_interval);
786 if (port->multicast_router != 1)
789 if (!hlist_unhashed(&port->rlist))
792 br_multicast_add_router(br, port);
795 mod_timer(&port->multicast_router_timer,
796 now + br->multicast_querier_interval);
799 static void br_multicast_query_received(struct net_bridge *br,
800 struct net_bridge_port *port,
804 mod_timer(&br->multicast_querier_timer,
805 jiffies + br->multicast_querier_interval);
806 else if (timer_pending(&br->multicast_querier_timer))
809 br_multicast_mark_router(br, port);
812 static int br_multicast_query(struct net_bridge *br,
813 struct net_bridge_port *port,
816 struct iphdr *iph = ip_hdr(skb);
817 struct igmphdr *ih = igmp_hdr(skb);
818 struct net_bridge_mdb_entry *mp;
819 struct igmpv3_query *ih3;
820 struct net_bridge_port_group *p;
821 struct net_bridge_port_group **pp;
822 unsigned long max_delay;
823 unsigned long now = jiffies;
826 spin_lock(&br->multicast_lock);
827 if (!netif_running(br->dev) ||
828 (port && port->state == BR_STATE_DISABLED))
831 br_multicast_query_received(br, port, iph->saddr);
835 if (skb->len == sizeof(*ih)) {
836 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
843 if (!pskb_may_pull(skb, sizeof(struct igmpv3_query)))
846 ih3 = igmpv3_query_hdr(skb);
850 max_delay = ih3->code ? 1 :
851 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE);
857 mp = br_mdb_ip_get(br->mdb, group);
861 max_delay *= br->multicast_last_member_count;
863 if (!hlist_unhashed(&mp->mglist) &&
864 (timer_pending(&mp->timer) ?
865 time_after(mp->timer.expires, now + max_delay) :
866 try_to_del_timer_sync(&mp->timer) >= 0))
867 mod_timer(&mp->timer, now + max_delay);
869 for (pp = &mp->ports; (p = *pp); pp = &p->next) {
870 if (timer_pending(&p->timer) ?
871 time_after(p->timer.expires, now + max_delay) :
872 try_to_del_timer_sync(&p->timer) >= 0)
873 mod_timer(&mp->timer, now + max_delay);
877 spin_unlock(&br->multicast_lock);
881 static void br_multicast_leave_group(struct net_bridge *br,
882 struct net_bridge_port *port,
885 struct net_bridge_mdb_htable *mdb;
886 struct net_bridge_mdb_entry *mp;
887 struct net_bridge_port_group *p;
891 if (ipv4_is_local_multicast(group))
894 spin_lock(&br->multicast_lock);
895 if (!netif_running(br->dev) ||
896 (port && port->state == BR_STATE_DISABLED) ||
897 timer_pending(&br->multicast_querier_timer))
901 mp = br_mdb_ip_get(mdb, group);
906 time = now + br->multicast_last_member_count *
907 br->multicast_last_member_interval;
910 if (!hlist_unhashed(&mp->mglist) &&
911 (timer_pending(&mp->timer) ?
912 time_after(mp->timer.expires, time) :
913 try_to_del_timer_sync(&mp->timer) >= 0)) {
914 mod_timer(&mp->timer, time);
916 mp->queries_sent = 0;
917 mod_timer(&mp->query_timer, now);
923 for (p = mp->ports; p; p = p->next) {
927 if (!hlist_unhashed(&p->mglist) &&
928 (timer_pending(&p->timer) ?
929 time_after(p->timer.expires, time) :
930 try_to_del_timer_sync(&p->timer) >= 0)) {
931 mod_timer(&p->timer, time);
934 mod_timer(&p->query_timer, now);
941 spin_unlock(&br->multicast_lock);
944 static int br_multicast_ipv4_rcv(struct net_bridge *br,
945 struct net_bridge_port *port,
948 struct sk_buff *skb2 = skb;
955 BR_INPUT_SKB_CB(skb)->igmp = 0;
956 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
958 /* We treat OOM as packet loss for now. */
959 if (!pskb_may_pull(skb, sizeof(*iph)))
964 if (iph->ihl < 5 || iph->version != 4)
967 if (!pskb_may_pull(skb, ip_hdrlen(skb)))
972 if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
975 if (iph->protocol != IPPROTO_IGMP)
978 len = ntohs(iph->tot_len);
979 if (skb->len < len || len < ip_hdrlen(skb))
982 if (skb->len > len) {
983 skb2 = skb_clone(skb, GFP_ATOMIC);
987 err = pskb_trim_rcsum(skb2, len);
992 len -= ip_hdrlen(skb2);
993 offset = skb_network_offset(skb2) + ip_hdrlen(skb2);
994 __skb_pull(skb2, offset);
995 skb_reset_transport_header(skb2);
998 if (!pskb_may_pull(skb2, sizeof(*ih)))
1003 switch (skb2->ip_summed) {
1004 case CHECKSUM_COMPLETE:
1005 if (!csum_fold(skb2->csum))
1010 if (skb_checksum_complete(skb2))
1016 BR_INPUT_SKB_CB(skb)->igmp = 1;
1017 ih = igmp_hdr(skb2);
1020 case IGMP_HOST_MEMBERSHIP_REPORT:
1021 case IGMPV2_HOST_MEMBERSHIP_REPORT:
1022 BR_INPUT_SKB_CB(skb2)->mrouters_only = 1;
1023 err = br_multicast_add_group(br, port, ih->group);
1025 case IGMPV3_HOST_MEMBERSHIP_REPORT:
1026 err = br_multicast_igmp3_report(br, port, skb2);
1028 case IGMP_HOST_MEMBERSHIP_QUERY:
1029 err = br_multicast_query(br, port, skb2);
1031 case IGMP_HOST_LEAVE_MESSAGE:
1032 br_multicast_leave_group(br, port, ih->group);
1037 __skb_push(skb2, offset);
1043 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
1044 struct sk_buff *skb)
1046 if (br->multicast_disabled)
1049 switch (skb->protocol) {
1050 case htons(ETH_P_IP):
1051 return br_multicast_ipv4_rcv(br, port, skb);
1057 static void br_multicast_query_expired(unsigned long data)
1059 struct net_bridge *br = (void *)data;
1061 spin_lock(&br->multicast_lock);
1062 if (br->multicast_startup_queries_sent <
1063 br->multicast_startup_query_count)
1064 br->multicast_startup_queries_sent++;
1066 br_multicast_send_query(br, NULL, br->multicast_startup_queries_sent);
1068 spin_unlock(&br->multicast_lock);
1071 void br_multicast_init(struct net_bridge *br)
1073 br->hash_elasticity = 4;
1076 br->multicast_router = 1;
1077 br->multicast_last_member_count = 2;
1078 br->multicast_startup_query_count = 2;
1080 br->multicast_last_member_interval = HZ;
1081 br->multicast_query_response_interval = 10 * HZ;
1082 br->multicast_startup_query_interval = 125 * HZ / 4;
1083 br->multicast_query_interval = 125 * HZ;
1084 br->multicast_querier_interval = 255 * HZ;
1085 br->multicast_membership_interval = 260 * HZ;
1087 spin_lock_init(&br->multicast_lock);
1088 setup_timer(&br->multicast_router_timer,
1089 br_multicast_local_router_expired, 0);
1090 setup_timer(&br->multicast_querier_timer,
1091 br_multicast_local_router_expired, 0);
1092 setup_timer(&br->multicast_query_timer, br_multicast_query_expired,
1096 void br_multicast_open(struct net_bridge *br)
1098 br->multicast_startup_queries_sent = 0;
1100 if (br->multicast_disabled)
1103 mod_timer(&br->multicast_query_timer, jiffies);
1106 void br_multicast_stop(struct net_bridge *br)
1108 struct net_bridge_mdb_htable *mdb;
1109 struct net_bridge_mdb_entry *mp;
1110 struct hlist_node *p, *n;
1114 del_timer_sync(&br->multicast_router_timer);
1115 del_timer_sync(&br->multicast_querier_timer);
1116 del_timer_sync(&br->multicast_query_timer);
1118 spin_lock_bh(&br->multicast_lock);
1126 for (i = 0; i < mdb->max; i++) {
1127 hlist_for_each_entry_safe(mp, p, n, &mdb->mhash[i],
1129 del_timer(&mp->timer);
1130 del_timer(&mp->query_timer);
1131 call_rcu_bh(&mp->rcu, br_multicast_free_group);
1136 spin_unlock_bh(&br->multicast_lock);
1137 synchronize_rcu_bh();
1138 spin_lock_bh(&br->multicast_lock);
1143 call_rcu_bh(&mdb->rcu, br_mdb_free);
1146 spin_unlock_bh(&br->multicast_lock);
1149 int br_multicast_set_router(struct net_bridge *br, unsigned long val)
1153 spin_lock_bh(&br->multicast_lock);
1154 if (!netif_running(br->dev))
1160 del_timer(&br->multicast_router_timer);
1163 br->multicast_router = val;
1173 spin_unlock_bh(&br->multicast_lock);
1178 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
1180 struct net_bridge *br = p->br;
1183 spin_lock(&br->multicast_lock);
1184 if (!netif_running(br->dev) || p->state == BR_STATE_DISABLED)
1191 p->multicast_router = val;
1194 if (val < 2 && !hlist_unhashed(&p->rlist))
1195 hlist_del_init_rcu(&p->rlist);
1200 del_timer(&p->multicast_router_timer);
1205 br_multicast_add_router(br, p);
1214 spin_unlock(&br->multicast_lock);
1219 int br_multicast_toggle(struct net_bridge *br, unsigned long val)
1221 struct net_bridge_port *port;
1224 spin_lock(&br->multicast_lock);
1225 if (!netif_running(br->dev))
1229 if (br->multicast_disabled == !val)
1232 br->multicast_disabled = !val;
1233 if (br->multicast_disabled)
1240 br->multicast_disabled = !!val;
1244 err = br_mdb_rehash(&br->mdb, br->mdb->max,
1245 br->hash_elasticity);
1250 br_multicast_open(br);
1251 list_for_each_entry(port, &br->port_list, list) {
1252 if (port->state == BR_STATE_DISABLED ||
1253 port->state == BR_STATE_BLOCKING)
1256 __br_multicast_enable_port(port);
1260 spin_unlock(&br->multicast_lock);