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>
27 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
30 #include <net/addrconf.h>
31 #include <net/ip6_checksum.h>
34 #include "br_private.h"
36 #define mlock_dereference(X, br) \
37 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
39 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
40 static inline int ipv6_is_local_multicast(const struct in6_addr
*addr
)
42 if (ipv6_addr_is_multicast(addr
) &&
43 IPV6_ADDR_MC_SCOPE(addr
) <= IPV6_ADDR_SCOPE_LINKLOCAL
)
49 static inline int br_ip_equal(const struct br_ip
*a
, const struct br_ip
*b
)
51 if (a
->proto
!= b
->proto
)
55 return a
->u
.ip4
== b
->u
.ip4
;
56 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
57 case htons(ETH_P_IPV6
):
58 return ipv6_addr_equal(&a
->u
.ip6
, &b
->u
.ip6
);
64 static inline int __br_ip4_hash(struct net_bridge_mdb_htable
*mdb
, __be32 ip
)
66 return jhash_1word(mdb
->secret
, (__force u32
)ip
) & (mdb
->max
- 1);
69 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
70 static inline int __br_ip6_hash(struct net_bridge_mdb_htable
*mdb
,
71 const struct in6_addr
*ip
)
73 return jhash2((__force u32
*)ip
->s6_addr32
, 4, mdb
->secret
) & (mdb
->max
- 1);
77 static inline int br_ip_hash(struct net_bridge_mdb_htable
*mdb
,
82 return __br_ip4_hash(mdb
, ip
->u
.ip4
);
83 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
84 case htons(ETH_P_IPV6
):
85 return __br_ip6_hash(mdb
, &ip
->u
.ip6
);
91 static struct net_bridge_mdb_entry
*__br_mdb_ip_get(
92 struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
, int hash
)
94 struct net_bridge_mdb_entry
*mp
;
97 hlist_for_each_entry_rcu(mp
, p
, &mdb
->mhash
[hash
], hlist
[mdb
->ver
]) {
98 if (br_ip_equal(&mp
->addr
, dst
))
105 static struct net_bridge_mdb_entry
*br_mdb_ip_get(
106 struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
)
111 return __br_mdb_ip_get(mdb
, dst
, br_ip_hash(mdb
, dst
));
114 static struct net_bridge_mdb_entry
*br_mdb_ip4_get(
115 struct net_bridge_mdb_htable
*mdb
, __be32 dst
)
120 br_dst
.proto
= htons(ETH_P_IP
);
122 return br_mdb_ip_get(mdb
, &br_dst
);
125 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
126 static struct net_bridge_mdb_entry
*br_mdb_ip6_get(
127 struct net_bridge_mdb_htable
*mdb
, const struct in6_addr
*dst
)
131 ipv6_addr_copy(&br_dst
.u
.ip6
, dst
);
132 br_dst
.proto
= htons(ETH_P_IPV6
);
134 return br_mdb_ip_get(mdb
, &br_dst
);
138 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
141 struct net_bridge_mdb_htable
*mdb
= rcu_dereference(br
->mdb
);
144 if (br
->multicast_disabled
)
147 if (BR_INPUT_SKB_CB(skb
)->igmp
)
150 ip
.proto
= skb
->protocol
;
152 switch (skb
->protocol
) {
153 case htons(ETH_P_IP
):
154 ip
.u
.ip4
= ip_hdr(skb
)->daddr
;
156 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
157 case htons(ETH_P_IPV6
):
158 ipv6_addr_copy(&ip
.u
.ip6
, &ipv6_hdr(skb
)->daddr
);
165 return br_mdb_ip_get(mdb
, &ip
);
168 static void br_mdb_free(struct rcu_head
*head
)
170 struct net_bridge_mdb_htable
*mdb
=
171 container_of(head
, struct net_bridge_mdb_htable
, rcu
);
172 struct net_bridge_mdb_htable
*old
= mdb
->old
;
179 static int br_mdb_copy(struct net_bridge_mdb_htable
*new,
180 struct net_bridge_mdb_htable
*old
,
183 struct net_bridge_mdb_entry
*mp
;
184 struct hlist_node
*p
;
189 for (i
= 0; i
< old
->max
; i
++)
190 hlist_for_each_entry(mp
, p
, &old
->mhash
[i
], hlist
[old
->ver
])
191 hlist_add_head(&mp
->hlist
[new->ver
],
192 &new->mhash
[br_ip_hash(new, &mp
->addr
)]);
198 for (i
= 0; i
< new->max
; i
++) {
200 hlist_for_each_entry(mp
, p
, &new->mhash
[i
], hlist
[new->ver
])
206 return maxlen
> elasticity
? -EINVAL
: 0;
209 static void br_multicast_free_pg(struct rcu_head
*head
)
211 struct net_bridge_port_group
*p
=
212 container_of(head
, struct net_bridge_port_group
, rcu
);
217 static void br_multicast_free_group(struct rcu_head
*head
)
219 struct net_bridge_mdb_entry
*mp
=
220 container_of(head
, struct net_bridge_mdb_entry
, rcu
);
225 static void br_multicast_group_expired(unsigned long data
)
227 struct net_bridge_mdb_entry
*mp
= (void *)data
;
228 struct net_bridge
*br
= mp
->br
;
229 struct net_bridge_mdb_htable
*mdb
;
231 spin_lock(&br
->multicast_lock
);
232 if (!netif_running(br
->dev
) || timer_pending(&mp
->timer
))
240 mdb
= mlock_dereference(br
->mdb
, br
);
242 hlist_del_rcu(&mp
->hlist
[mdb
->ver
]);
245 del_timer(&mp
->query_timer
);
246 call_rcu_bh(&mp
->rcu
, br_multicast_free_group
);
249 spin_unlock(&br
->multicast_lock
);
252 static void br_multicast_del_pg(struct net_bridge
*br
,
253 struct net_bridge_port_group
*pg
)
255 struct net_bridge_mdb_htable
*mdb
;
256 struct net_bridge_mdb_entry
*mp
;
257 struct net_bridge_port_group
*p
;
258 struct net_bridge_port_group __rcu
**pp
;
260 mdb
= mlock_dereference(br
->mdb
, br
);
262 mp
= br_mdb_ip_get(mdb
, &pg
->addr
);
266 for (pp
= &mp
->ports
;
267 (p
= mlock_dereference(*pp
, br
)) != NULL
;
272 rcu_assign_pointer(*pp
, p
->next
);
273 hlist_del_init(&p
->mglist
);
274 del_timer(&p
->timer
);
275 del_timer(&p
->query_timer
);
276 call_rcu_bh(&p
->rcu
, br_multicast_free_pg
);
278 if (!mp
->ports
&& !mp
->mglist
&&
279 netif_running(br
->dev
))
280 mod_timer(&mp
->timer
, jiffies
);
288 static void br_multicast_port_group_expired(unsigned long data
)
290 struct net_bridge_port_group
*pg
= (void *)data
;
291 struct net_bridge
*br
= pg
->port
->br
;
293 spin_lock(&br
->multicast_lock
);
294 if (!netif_running(br
->dev
) || timer_pending(&pg
->timer
) ||
295 hlist_unhashed(&pg
->mglist
))
298 br_multicast_del_pg(br
, pg
);
301 spin_unlock(&br
->multicast_lock
);
304 static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu
**mdbp
, int max
,
307 struct net_bridge_mdb_htable
*old
= rcu_dereference_protected(*mdbp
, 1);
308 struct net_bridge_mdb_htable
*mdb
;
311 mdb
= kmalloc(sizeof(*mdb
), GFP_ATOMIC
);
318 mdb
->mhash
= kzalloc(max
* sizeof(*mdb
->mhash
), GFP_ATOMIC
);
324 mdb
->size
= old
? old
->size
: 0;
325 mdb
->ver
= old
? old
->ver
^ 1 : 0;
327 if (!old
|| elasticity
)
328 get_random_bytes(&mdb
->secret
, sizeof(mdb
->secret
));
330 mdb
->secret
= old
->secret
;
335 err
= br_mdb_copy(mdb
, old
, elasticity
);
342 call_rcu_bh(&mdb
->rcu
, br_mdb_free
);
345 rcu_assign_pointer(*mdbp
, mdb
);
350 static struct sk_buff
*br_ip4_multicast_alloc_query(struct net_bridge
*br
,
358 skb
= netdev_alloc_skb_ip_align(br
->dev
, sizeof(*eth
) + sizeof(*iph
) +
363 skb
->protocol
= htons(ETH_P_IP
);
365 skb_reset_mac_header(skb
);
368 memcpy(eth
->h_source
, br
->dev
->dev_addr
, 6);
371 eth
->h_dest
[2] = 0x5e;
375 eth
->h_proto
= htons(ETH_P_IP
);
376 skb_put(skb
, sizeof(*eth
));
378 skb_set_network_header(skb
, skb
->len
);
384 iph
->tot_len
= htons(sizeof(*iph
) + sizeof(*ih
) + 4);
386 iph
->frag_off
= htons(IP_DF
);
388 iph
->protocol
= IPPROTO_IGMP
;
390 iph
->daddr
= htonl(INADDR_ALLHOSTS_GROUP
);
391 ((u8
*)&iph
[1])[0] = IPOPT_RA
;
392 ((u8
*)&iph
[1])[1] = 4;
393 ((u8
*)&iph
[1])[2] = 0;
394 ((u8
*)&iph
[1])[3] = 0;
398 skb_set_transport_header(skb
, skb
->len
);
400 ih
->type
= IGMP_HOST_MEMBERSHIP_QUERY
;
401 ih
->code
= (group
? br
->multicast_last_member_interval
:
402 br
->multicast_query_response_interval
) /
403 (HZ
/ IGMP_TIMER_SCALE
);
406 ih
->csum
= ip_compute_csum((void *)ih
, sizeof(struct igmphdr
));
407 skb_put(skb
, sizeof(*ih
));
409 __skb_pull(skb
, sizeof(*eth
));
415 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
416 static struct sk_buff
*br_ip6_multicast_alloc_query(struct net_bridge
*br
,
417 struct in6_addr
*group
)
420 struct ipv6hdr
*ip6h
;
421 struct mld_msg
*mldq
;
424 unsigned long interval
;
426 skb
= netdev_alloc_skb_ip_align(br
->dev
, sizeof(*eth
) + sizeof(*ip6h
) +
431 skb
->protocol
= htons(ETH_P_IPV6
);
433 /* Ethernet header */
434 skb_reset_mac_header(skb
);
437 memcpy(eth
->h_source
, br
->dev
->dev_addr
, 6);
438 ipv6_eth_mc_map(group
, eth
->h_dest
);
439 eth
->h_proto
= htons(ETH_P_IPV6
);
440 skb_put(skb
, sizeof(*eth
));
442 /* IPv6 header + HbH option */
443 skb_set_network_header(skb
, skb
->len
);
444 ip6h
= ipv6_hdr(skb
);
446 *(__force __be32
*)ip6h
= htonl(0x60000000);
447 ip6h
->payload_len
= htons(8 + sizeof(*mldq
));
448 ip6h
->nexthdr
= IPPROTO_HOPOPTS
;
450 ipv6_addr_set(&ip6h
->saddr
, 0, 0, 0, 0);
451 ipv6_addr_set(&ip6h
->daddr
, htonl(0xff020000), 0, 0, htonl(1));
453 hopopt
= (u8
*)(ip6h
+ 1);
454 hopopt
[0] = IPPROTO_ICMPV6
; /* next hdr */
455 hopopt
[1] = 0; /* length of HbH */
456 hopopt
[2] = IPV6_TLV_ROUTERALERT
; /* Router Alert */
457 hopopt
[3] = 2; /* Length of RA Option */
458 hopopt
[4] = 0; /* Type = 0x0000 (MLD) */
460 hopopt
[6] = IPV6_TLV_PAD0
; /* Pad0 */
461 hopopt
[7] = IPV6_TLV_PAD0
; /* Pad0 */
463 skb_put(skb
, sizeof(*ip6h
) + 8);
466 skb_set_transport_header(skb
, skb
->len
);
467 mldq
= (struct mld_msg
*) icmp6_hdr(skb
);
469 interval
= ipv6_addr_any(group
) ? br
->multicast_last_member_interval
:
470 br
->multicast_query_response_interval
;
472 mldq
->mld_type
= ICMPV6_MGM_QUERY
;
475 mldq
->mld_maxdelay
= htons((u16
)jiffies_to_msecs(interval
));
476 mldq
->mld_reserved
= 0;
477 ipv6_addr_copy(&mldq
->mld_mca
, group
);
480 mldq
->mld_cksum
= csum_ipv6_magic(&ip6h
->saddr
, &ip6h
->daddr
,
481 sizeof(*mldq
), IPPROTO_ICMPV6
,
484 skb_put(skb
, sizeof(*mldq
));
486 __skb_pull(skb
, sizeof(*eth
));
493 static struct sk_buff
*br_multicast_alloc_query(struct net_bridge
*br
,
496 switch (addr
->proto
) {
497 case htons(ETH_P_IP
):
498 return br_ip4_multicast_alloc_query(br
, addr
->u
.ip4
);
499 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
500 case htons(ETH_P_IPV6
):
501 return br_ip6_multicast_alloc_query(br
, &addr
->u
.ip6
);
507 static void br_multicast_send_group_query(struct net_bridge_mdb_entry
*mp
)
509 struct net_bridge
*br
= mp
->br
;
512 skb
= br_multicast_alloc_query(br
, &mp
->addr
);
519 if (++mp
->queries_sent
< br
->multicast_last_member_count
)
520 mod_timer(&mp
->query_timer
,
521 jiffies
+ br
->multicast_last_member_interval
);
524 static void br_multicast_group_query_expired(unsigned long data
)
526 struct net_bridge_mdb_entry
*mp
= (void *)data
;
527 struct net_bridge
*br
= mp
->br
;
529 spin_lock(&br
->multicast_lock
);
530 if (!netif_running(br
->dev
) || !mp
->mglist
||
531 mp
->queries_sent
>= br
->multicast_last_member_count
)
534 br_multicast_send_group_query(mp
);
537 spin_unlock(&br
->multicast_lock
);
540 static void br_multicast_send_port_group_query(struct net_bridge_port_group
*pg
)
542 struct net_bridge_port
*port
= pg
->port
;
543 struct net_bridge
*br
= port
->br
;
546 skb
= br_multicast_alloc_query(br
, &pg
->addr
);
550 br_deliver(port
, skb
);
553 if (++pg
->queries_sent
< br
->multicast_last_member_count
)
554 mod_timer(&pg
->query_timer
,
555 jiffies
+ br
->multicast_last_member_interval
);
558 static void br_multicast_port_group_query_expired(unsigned long data
)
560 struct net_bridge_port_group
*pg
= (void *)data
;
561 struct net_bridge_port
*port
= pg
->port
;
562 struct net_bridge
*br
= port
->br
;
564 spin_lock(&br
->multicast_lock
);
565 if (!netif_running(br
->dev
) || hlist_unhashed(&pg
->mglist
) ||
566 pg
->queries_sent
>= br
->multicast_last_member_count
)
569 br_multicast_send_port_group_query(pg
);
572 spin_unlock(&br
->multicast_lock
);
575 static struct net_bridge_mdb_entry
*br_multicast_get_group(
576 struct net_bridge
*br
, struct net_bridge_port
*port
,
577 struct br_ip
*group
, int hash
)
579 struct net_bridge_mdb_htable
*mdb
;
580 struct net_bridge_mdb_entry
*mp
;
581 struct hlist_node
*p
;
587 mdb
= rcu_dereference_protected(br
->mdb
, 1);
588 hlist_for_each_entry(mp
, p
, &mdb
->mhash
[hash
], hlist
[mdb
->ver
]) {
590 if (unlikely(br_ip_equal(group
, &mp
->addr
)))
597 if (unlikely(count
> br
->hash_elasticity
&& count
)) {
599 br_info(br
, "Multicast hash table "
600 "chain limit reached: %s\n",
601 port
? port
->dev
->name
: br
->dev
->name
);
603 elasticity
= br
->hash_elasticity
;
606 if (mdb
->size
>= max
) {
608 if (unlikely(max
>= br
->hash_max
)) {
609 br_warn(br
, "Multicast hash table maximum "
610 "reached, disabling snooping: %s, %d\n",
611 port
? port
->dev
->name
: br
->dev
->name
, max
);
614 br
->multicast_disabled
= 1;
619 if (max
> mdb
->max
|| elasticity
) {
622 br_info(br
, "Multicast hash table "
624 port
? port
->dev
->name
: br
->dev
->name
);
629 err
= br_mdb_rehash(&br
->mdb
, max
, elasticity
);
631 br_warn(br
, "Cannot rehash multicast "
632 "hash table, disabling snooping: %s, %d, %d\n",
633 port
? port
->dev
->name
: br
->dev
->name
,
649 static struct net_bridge_mdb_entry
*br_multicast_new_group(
650 struct net_bridge
*br
, struct net_bridge_port
*port
,
653 struct net_bridge_mdb_htable
*mdb
;
654 struct net_bridge_mdb_entry
*mp
;
658 mdb
= rcu_dereference_protected(br
->mdb
, 1);
660 err
= br_mdb_rehash(&br
->mdb
, BR_HASH_SIZE
, 0);
666 hash
= br_ip_hash(mdb
, group
);
667 mp
= br_multicast_get_group(br
, port
, group
, hash
);
668 switch (PTR_ERR(mp
)) {
674 mdb
= rcu_dereference_protected(br
->mdb
, 1);
675 hash
= br_ip_hash(mdb
, group
);
682 mp
= kzalloc(sizeof(*mp
), GFP_ATOMIC
);
684 return ERR_PTR(-ENOMEM
);
688 setup_timer(&mp
->timer
, br_multicast_group_expired
,
690 setup_timer(&mp
->query_timer
, br_multicast_group_query_expired
,
693 hlist_add_head_rcu(&mp
->hlist
[mdb
->ver
], &mdb
->mhash
[hash
]);
700 static int br_multicast_add_group(struct net_bridge
*br
,
701 struct net_bridge_port
*port
,
704 struct net_bridge_mdb_entry
*mp
;
705 struct net_bridge_port_group
*p
;
706 struct net_bridge_port_group __rcu
**pp
;
707 unsigned long now
= jiffies
;
710 spin_lock(&br
->multicast_lock
);
711 if (!netif_running(br
->dev
) ||
712 (port
&& port
->state
== BR_STATE_DISABLED
))
715 mp
= br_multicast_new_group(br
, port
, group
);
722 mod_timer(&mp
->timer
, now
+ br
->multicast_membership_interval
);
726 for (pp
= &mp
->ports
;
727 (p
= mlock_dereference(*pp
, br
)) != NULL
;
731 if ((unsigned long)p
->port
< (unsigned long)port
)
735 p
= kzalloc(sizeof(*p
), GFP_ATOMIC
);
743 hlist_add_head(&p
->mglist
, &port
->mglist
);
744 setup_timer(&p
->timer
, br_multicast_port_group_expired
,
746 setup_timer(&p
->query_timer
, br_multicast_port_group_query_expired
,
749 rcu_assign_pointer(*pp
, p
);
752 mod_timer(&p
->timer
, now
+ br
->multicast_membership_interval
);
757 spin_unlock(&br
->multicast_lock
);
761 static int br_ip4_multicast_add_group(struct net_bridge
*br
,
762 struct net_bridge_port
*port
,
765 struct br_ip br_group
;
767 if (ipv4_is_local_multicast(group
))
770 br_group
.u
.ip4
= group
;
771 br_group
.proto
= htons(ETH_P_IP
);
773 return br_multicast_add_group(br
, port
, &br_group
);
776 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
777 static int br_ip6_multicast_add_group(struct net_bridge
*br
,
778 struct net_bridge_port
*port
,
779 const struct in6_addr
*group
)
781 struct br_ip br_group
;
783 if (ipv6_is_local_multicast(group
))
786 ipv6_addr_copy(&br_group
.u
.ip6
, group
);
787 br_group
.proto
= htons(ETH_P_IPV6
);
789 return br_multicast_add_group(br
, port
, &br_group
);
793 static void br_multicast_router_expired(unsigned long data
)
795 struct net_bridge_port
*port
= (void *)data
;
796 struct net_bridge
*br
= port
->br
;
798 spin_lock(&br
->multicast_lock
);
799 if (port
->multicast_router
!= 1 ||
800 timer_pending(&port
->multicast_router_timer
) ||
801 hlist_unhashed(&port
->rlist
))
804 hlist_del_init_rcu(&port
->rlist
);
807 spin_unlock(&br
->multicast_lock
);
810 static void br_multicast_local_router_expired(unsigned long data
)
814 static void __br_multicast_send_query(struct net_bridge
*br
,
815 struct net_bridge_port
*port
,
820 skb
= br_multicast_alloc_query(br
, ip
);
825 __skb_push(skb
, sizeof(struct ethhdr
));
826 skb
->dev
= port
->dev
;
827 NF_HOOK(NFPROTO_BRIDGE
, NF_BR_LOCAL_OUT
, skb
, NULL
, skb
->dev
,
833 static void br_multicast_send_query(struct net_bridge
*br
,
834 struct net_bridge_port
*port
, u32 sent
)
837 struct br_ip br_group
;
839 if (!netif_running(br
->dev
) || br
->multicast_disabled
||
840 timer_pending(&br
->multicast_querier_timer
))
843 memset(&br_group
.u
, 0, sizeof(br_group
.u
));
845 br_group
.proto
= htons(ETH_P_IP
);
846 __br_multicast_send_query(br
, port
, &br_group
);
848 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
849 br_group
.proto
= htons(ETH_P_IPV6
);
850 __br_multicast_send_query(br
, port
, &br_group
);
854 time
+= sent
< br
->multicast_startup_query_count
?
855 br
->multicast_startup_query_interval
:
856 br
->multicast_query_interval
;
857 mod_timer(port
? &port
->multicast_query_timer
:
858 &br
->multicast_query_timer
, time
);
861 static void br_multicast_port_query_expired(unsigned long data
)
863 struct net_bridge_port
*port
= (void *)data
;
864 struct net_bridge
*br
= port
->br
;
866 spin_lock(&br
->multicast_lock
);
867 if (port
->state
== BR_STATE_DISABLED
||
868 port
->state
== BR_STATE_BLOCKING
)
871 if (port
->multicast_startup_queries_sent
<
872 br
->multicast_startup_query_count
)
873 port
->multicast_startup_queries_sent
++;
875 br_multicast_send_query(port
->br
, port
,
876 port
->multicast_startup_queries_sent
);
879 spin_unlock(&br
->multicast_lock
);
882 void br_multicast_add_port(struct net_bridge_port
*port
)
884 port
->multicast_router
= 1;
886 setup_timer(&port
->multicast_router_timer
, br_multicast_router_expired
,
887 (unsigned long)port
);
888 setup_timer(&port
->multicast_query_timer
,
889 br_multicast_port_query_expired
, (unsigned long)port
);
892 void br_multicast_del_port(struct net_bridge_port
*port
)
894 del_timer_sync(&port
->multicast_router_timer
);
897 static void __br_multicast_enable_port(struct net_bridge_port
*port
)
899 port
->multicast_startup_queries_sent
= 0;
901 if (try_to_del_timer_sync(&port
->multicast_query_timer
) >= 0 ||
902 del_timer(&port
->multicast_query_timer
))
903 mod_timer(&port
->multicast_query_timer
, jiffies
);
906 void br_multicast_enable_port(struct net_bridge_port
*port
)
908 struct net_bridge
*br
= port
->br
;
910 spin_lock(&br
->multicast_lock
);
911 if (br
->multicast_disabled
|| !netif_running(br
->dev
))
914 __br_multicast_enable_port(port
);
917 spin_unlock(&br
->multicast_lock
);
920 void br_multicast_disable_port(struct net_bridge_port
*port
)
922 struct net_bridge
*br
= port
->br
;
923 struct net_bridge_port_group
*pg
;
924 struct hlist_node
*p
, *n
;
926 spin_lock(&br
->multicast_lock
);
927 hlist_for_each_entry_safe(pg
, p
, n
, &port
->mglist
, mglist
)
928 br_multicast_del_pg(br
, pg
);
930 if (!hlist_unhashed(&port
->rlist
))
931 hlist_del_init_rcu(&port
->rlist
);
932 del_timer(&port
->multicast_router_timer
);
933 del_timer(&port
->multicast_query_timer
);
934 spin_unlock(&br
->multicast_lock
);
937 static int br_ip4_multicast_igmp3_report(struct net_bridge
*br
,
938 struct net_bridge_port
*port
,
941 struct igmpv3_report
*ih
;
942 struct igmpv3_grec
*grec
;
950 if (!pskb_may_pull(skb
, sizeof(*ih
)))
953 ih
= igmpv3_report_hdr(skb
);
954 num
= ntohs(ih
->ngrec
);
957 for (i
= 0; i
< num
; i
++) {
958 len
+= sizeof(*grec
);
959 if (!pskb_may_pull(skb
, len
))
962 grec
= (void *)(skb
->data
+ len
- sizeof(*grec
));
963 group
= grec
->grec_mca
;
964 type
= grec
->grec_type
;
966 len
+= ntohs(grec
->grec_nsrcs
) * 4;
967 if (!pskb_may_pull(skb
, len
))
970 /* We treat this as an IGMPv2 report for now. */
972 case IGMPV3_MODE_IS_INCLUDE
:
973 case IGMPV3_MODE_IS_EXCLUDE
:
974 case IGMPV3_CHANGE_TO_INCLUDE
:
975 case IGMPV3_CHANGE_TO_EXCLUDE
:
976 case IGMPV3_ALLOW_NEW_SOURCES
:
977 case IGMPV3_BLOCK_OLD_SOURCES
:
984 err
= br_ip4_multicast_add_group(br
, port
, group
);
992 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
993 static int br_ip6_multicast_mld2_report(struct net_bridge
*br
,
994 struct net_bridge_port
*port
,
997 struct icmp6hdr
*icmp6h
;
998 struct mld2_grec
*grec
;
1004 if (!pskb_may_pull(skb
, sizeof(*icmp6h
)))
1007 icmp6h
= icmp6_hdr(skb
);
1008 num
= ntohs(icmp6h
->icmp6_dataun
.un_data16
[1]);
1009 len
= sizeof(*icmp6h
);
1011 for (i
= 0; i
< num
; i
++) {
1012 __be16
*nsrcs
, _nsrcs
;
1014 nsrcs
= skb_header_pointer(skb
,
1015 len
+ offsetof(struct mld2_grec
,
1017 sizeof(_nsrcs
), &_nsrcs
);
1021 if (!pskb_may_pull(skb
,
1022 len
+ sizeof(*grec
) +
1023 sizeof(struct in6_addr
) * (*nsrcs
)))
1026 grec
= (struct mld2_grec
*)(skb
->data
+ len
);
1027 len
+= sizeof(*grec
) + sizeof(struct in6_addr
) * (*nsrcs
);
1029 /* We treat these as MLDv1 reports for now. */
1030 switch (grec
->grec_type
) {
1031 case MLD2_MODE_IS_INCLUDE
:
1032 case MLD2_MODE_IS_EXCLUDE
:
1033 case MLD2_CHANGE_TO_INCLUDE
:
1034 case MLD2_CHANGE_TO_EXCLUDE
:
1035 case MLD2_ALLOW_NEW_SOURCES
:
1036 case MLD2_BLOCK_OLD_SOURCES
:
1043 err
= br_ip6_multicast_add_group(br
, port
, &grec
->grec_mca
);
1053 * Add port to rotuer_list
1054 * list is maintained ordered by pointer value
1055 * and locked by br->multicast_lock and RCU
1057 static void br_multicast_add_router(struct net_bridge
*br
,
1058 struct net_bridge_port
*port
)
1060 struct net_bridge_port
*p
;
1061 struct hlist_node
*n
, *slot
= NULL
;
1063 hlist_for_each_entry(p
, n
, &br
->router_list
, rlist
) {
1064 if ((unsigned long) port
>= (unsigned long) p
)
1070 hlist_add_after_rcu(slot
, &port
->rlist
);
1072 hlist_add_head_rcu(&port
->rlist
, &br
->router_list
);
1075 static void br_multicast_mark_router(struct net_bridge
*br
,
1076 struct net_bridge_port
*port
)
1078 unsigned long now
= jiffies
;
1081 if (br
->multicast_router
== 1)
1082 mod_timer(&br
->multicast_router_timer
,
1083 now
+ br
->multicast_querier_interval
);
1087 if (port
->multicast_router
!= 1)
1090 if (!hlist_unhashed(&port
->rlist
))
1093 br_multicast_add_router(br
, port
);
1096 mod_timer(&port
->multicast_router_timer
,
1097 now
+ br
->multicast_querier_interval
);
1100 static void br_multicast_query_received(struct net_bridge
*br
,
1101 struct net_bridge_port
*port
,
1105 mod_timer(&br
->multicast_querier_timer
,
1106 jiffies
+ br
->multicast_querier_interval
);
1107 else if (timer_pending(&br
->multicast_querier_timer
))
1110 br_multicast_mark_router(br
, port
);
1113 static int br_ip4_multicast_query(struct net_bridge
*br
,
1114 struct net_bridge_port
*port
,
1115 struct sk_buff
*skb
)
1117 struct iphdr
*iph
= ip_hdr(skb
);
1118 struct igmphdr
*ih
= igmp_hdr(skb
);
1119 struct net_bridge_mdb_entry
*mp
;
1120 struct igmpv3_query
*ih3
;
1121 struct net_bridge_port_group
*p
;
1122 struct net_bridge_port_group __rcu
**pp
;
1123 unsigned long max_delay
;
1124 unsigned long now
= jiffies
;
1128 spin_lock(&br
->multicast_lock
);
1129 if (!netif_running(br
->dev
) ||
1130 (port
&& port
->state
== BR_STATE_DISABLED
))
1133 br_multicast_query_received(br
, port
, !!iph
->saddr
);
1137 if (skb
->len
== sizeof(*ih
)) {
1138 max_delay
= ih
->code
* (HZ
/ IGMP_TIMER_SCALE
);
1141 max_delay
= 10 * HZ
;
1145 if (!pskb_may_pull(skb
, sizeof(struct igmpv3_query
))) {
1150 ih3
= igmpv3_query_hdr(skb
);
1154 max_delay
= ih3
->code
?
1155 IGMPV3_MRC(ih3
->code
) * (HZ
/ IGMP_TIMER_SCALE
) : 1;
1161 mp
= br_mdb_ip4_get(mlock_dereference(br
->mdb
, br
), group
);
1165 max_delay
*= br
->multicast_last_member_count
;
1168 (timer_pending(&mp
->timer
) ?
1169 time_after(mp
->timer
.expires
, now
+ max_delay
) :
1170 try_to_del_timer_sync(&mp
->timer
) >= 0))
1171 mod_timer(&mp
->timer
, now
+ max_delay
);
1173 for (pp
= &mp
->ports
;
1174 (p
= mlock_dereference(*pp
, br
)) != NULL
;
1176 if (timer_pending(&p
->timer
) ?
1177 time_after(p
->timer
.expires
, now
+ max_delay
) :
1178 try_to_del_timer_sync(&p
->timer
) >= 0)
1179 mod_timer(&p
->timer
, now
+ max_delay
);
1183 spin_unlock(&br
->multicast_lock
);
1187 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1188 static int br_ip6_multicast_query(struct net_bridge
*br
,
1189 struct net_bridge_port
*port
,
1190 struct sk_buff
*skb
)
1192 struct ipv6hdr
*ip6h
= ipv6_hdr(skb
);
1193 struct mld_msg
*mld
= (struct mld_msg
*) icmp6_hdr(skb
);
1194 struct net_bridge_mdb_entry
*mp
;
1195 struct mld2_query
*mld2q
;
1196 struct net_bridge_port_group
*p
;
1197 struct net_bridge_port_group __rcu
**pp
;
1198 unsigned long max_delay
;
1199 unsigned long now
= jiffies
;
1200 struct in6_addr
*group
= NULL
;
1203 spin_lock(&br
->multicast_lock
);
1204 if (!netif_running(br
->dev
) ||
1205 (port
&& port
->state
== BR_STATE_DISABLED
))
1208 br_multicast_query_received(br
, port
, !ipv6_addr_any(&ip6h
->saddr
));
1210 if (skb
->len
== sizeof(*mld
)) {
1211 if (!pskb_may_pull(skb
, sizeof(*mld
))) {
1215 mld
= (struct mld_msg
*) icmp6_hdr(skb
);
1216 max_delay
= msecs_to_jiffies(htons(mld
->mld_maxdelay
));
1218 group
= &mld
->mld_mca
;
1219 } else if (skb
->len
>= sizeof(*mld2q
)) {
1220 if (!pskb_may_pull(skb
, sizeof(*mld2q
))) {
1224 mld2q
= (struct mld2_query
*)icmp6_hdr(skb
);
1225 if (!mld2q
->mld2q_nsrcs
)
1226 group
= &mld2q
->mld2q_mca
;
1227 max_delay
= mld2q
->mld2q_mrc
? MLDV2_MRC(mld2q
->mld2q_mrc
) : 1;
1233 mp
= br_mdb_ip6_get(mlock_dereference(br
->mdb
, br
), group
);
1237 max_delay
*= br
->multicast_last_member_count
;
1239 (timer_pending(&mp
->timer
) ?
1240 time_after(mp
->timer
.expires
, now
+ max_delay
) :
1241 try_to_del_timer_sync(&mp
->timer
) >= 0))
1242 mod_timer(&mp
->timer
, now
+ max_delay
);
1244 for (pp
= &mp
->ports
;
1245 (p
= mlock_dereference(*pp
, br
)) != NULL
;
1247 if (timer_pending(&p
->timer
) ?
1248 time_after(p
->timer
.expires
, now
+ max_delay
) :
1249 try_to_del_timer_sync(&p
->timer
) >= 0)
1250 mod_timer(&p
->timer
, now
+ max_delay
);
1254 spin_unlock(&br
->multicast_lock
);
1259 static void br_multicast_leave_group(struct net_bridge
*br
,
1260 struct net_bridge_port
*port
,
1261 struct br_ip
*group
)
1263 struct net_bridge_mdb_htable
*mdb
;
1264 struct net_bridge_mdb_entry
*mp
;
1265 struct net_bridge_port_group
*p
;
1269 spin_lock(&br
->multicast_lock
);
1270 if (!netif_running(br
->dev
) ||
1271 (port
&& port
->state
== BR_STATE_DISABLED
) ||
1272 timer_pending(&br
->multicast_querier_timer
))
1275 mdb
= mlock_dereference(br
->mdb
, br
);
1276 mp
= br_mdb_ip_get(mdb
, group
);
1281 time
= now
+ br
->multicast_last_member_count
*
1282 br
->multicast_last_member_interval
;
1286 (timer_pending(&mp
->timer
) ?
1287 time_after(mp
->timer
.expires
, time
) :
1288 try_to_del_timer_sync(&mp
->timer
) >= 0)) {
1289 mod_timer(&mp
->timer
, time
);
1291 mp
->queries_sent
= 0;
1292 mod_timer(&mp
->query_timer
, now
);
1298 for (p
= mlock_dereference(mp
->ports
, br
);
1300 p
= mlock_dereference(p
->next
, br
)) {
1301 if (p
->port
!= port
)
1304 if (!hlist_unhashed(&p
->mglist
) &&
1305 (timer_pending(&p
->timer
) ?
1306 time_after(p
->timer
.expires
, time
) :
1307 try_to_del_timer_sync(&p
->timer
) >= 0)) {
1308 mod_timer(&p
->timer
, time
);
1310 p
->queries_sent
= 0;
1311 mod_timer(&p
->query_timer
, now
);
1318 spin_unlock(&br
->multicast_lock
);
1321 static void br_ip4_multicast_leave_group(struct net_bridge
*br
,
1322 struct net_bridge_port
*port
,
1325 struct br_ip br_group
;
1327 if (ipv4_is_local_multicast(group
))
1330 br_group
.u
.ip4
= group
;
1331 br_group
.proto
= htons(ETH_P_IP
);
1333 br_multicast_leave_group(br
, port
, &br_group
);
1336 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1337 static void br_ip6_multicast_leave_group(struct net_bridge
*br
,
1338 struct net_bridge_port
*port
,
1339 const struct in6_addr
*group
)
1341 struct br_ip br_group
;
1343 if (ipv6_is_local_multicast(group
))
1346 ipv6_addr_copy(&br_group
.u
.ip6
, group
);
1347 br_group
.proto
= htons(ETH_P_IPV6
);
1349 br_multicast_leave_group(br
, port
, &br_group
);
1353 static int br_multicast_ipv4_rcv(struct net_bridge
*br
,
1354 struct net_bridge_port
*port
,
1355 struct sk_buff
*skb
)
1357 struct sk_buff
*skb2
= skb
;
1364 /* We treat OOM as packet loss for now. */
1365 if (!pskb_may_pull(skb
, sizeof(*iph
)))
1370 if (iph
->ihl
< 5 || iph
->version
!= 4)
1373 if (!pskb_may_pull(skb
, ip_hdrlen(skb
)))
1378 if (unlikely(ip_fast_csum((u8
*)iph
, iph
->ihl
)))
1381 if (iph
->protocol
!= IPPROTO_IGMP
)
1384 len
= ntohs(iph
->tot_len
);
1385 if (skb
->len
< len
|| len
< ip_hdrlen(skb
))
1388 if (skb
->len
> len
) {
1389 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1393 err
= pskb_trim_rcsum(skb2
, len
);
1398 len
-= ip_hdrlen(skb2
);
1399 offset
= skb_network_offset(skb2
) + ip_hdrlen(skb2
);
1400 __skb_pull(skb2
, offset
);
1401 skb_reset_transport_header(skb2
);
1404 if (!pskb_may_pull(skb2
, sizeof(*ih
)))
1407 switch (skb2
->ip_summed
) {
1408 case CHECKSUM_COMPLETE
:
1409 if (!csum_fold(skb2
->csum
))
1414 if (skb_checksum_complete(skb2
))
1420 BR_INPUT_SKB_CB(skb
)->igmp
= 1;
1421 ih
= igmp_hdr(skb2
);
1424 case IGMP_HOST_MEMBERSHIP_REPORT
:
1425 case IGMPV2_HOST_MEMBERSHIP_REPORT
:
1426 BR_INPUT_SKB_CB(skb2
)->mrouters_only
= 1;
1427 err
= br_ip4_multicast_add_group(br
, port
, ih
->group
);
1429 case IGMPV3_HOST_MEMBERSHIP_REPORT
:
1430 err
= br_ip4_multicast_igmp3_report(br
, port
, skb2
);
1432 case IGMP_HOST_MEMBERSHIP_QUERY
:
1433 err
= br_ip4_multicast_query(br
, port
, skb2
);
1435 case IGMP_HOST_LEAVE_MESSAGE
:
1436 br_ip4_multicast_leave_group(br
, port
, ih
->group
);
1441 __skb_push(skb2
, offset
);
1448 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1449 static int br_multicast_ipv6_rcv(struct net_bridge
*br
,
1450 struct net_bridge_port
*port
,
1451 struct sk_buff
*skb
)
1453 struct sk_buff
*skb2
;
1454 struct ipv6hdr
*ip6h
;
1455 struct icmp6hdr
*icmp6h
;
1461 if (!pskb_may_pull(skb
, sizeof(*ip6h
)))
1464 ip6h
= ipv6_hdr(skb
);
1467 * We're interested in MLD messages only.
1469 * - MLD has always Router Alert hop-by-hop option
1470 * - But we do not support jumbrograms.
1472 if (ip6h
->version
!= 6 ||
1473 ip6h
->nexthdr
!= IPPROTO_HOPOPTS
||
1474 ip6h
->payload_len
== 0)
1477 len
= ntohs(ip6h
->payload_len
);
1481 nexthdr
= ip6h
->nexthdr
;
1482 offset
= ipv6_skip_exthdr(skb
, sizeof(*ip6h
), &nexthdr
);
1484 if (offset
< 0 || nexthdr
!= IPPROTO_ICMPV6
)
1487 /* Okay, we found ICMPv6 header */
1488 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1493 if (!pskb_may_pull(skb2
, offset
+ sizeof(struct icmp6hdr
)))
1496 len
-= offset
- skb_network_offset(skb2
);
1498 __skb_pull(skb2
, offset
);
1499 skb_reset_transport_header(skb2
);
1501 icmp6h
= icmp6_hdr(skb2
);
1503 switch (icmp6h
->icmp6_type
) {
1504 case ICMPV6_MGM_QUERY
:
1505 case ICMPV6_MGM_REPORT
:
1506 case ICMPV6_MGM_REDUCTION
:
1507 case ICMPV6_MLD2_REPORT
:
1514 /* Okay, we found MLD message. Check further. */
1515 if (skb2
->len
> len
) {
1516 err
= pskb_trim_rcsum(skb2
, len
);
1521 switch (skb2
->ip_summed
) {
1522 case CHECKSUM_COMPLETE
:
1523 if (!csum_fold(skb2
->csum
))
1528 if (skb_checksum_complete(skb2
))
1534 BR_INPUT_SKB_CB(skb
)->igmp
= 1;
1536 switch (icmp6h
->icmp6_type
) {
1537 case ICMPV6_MGM_REPORT
:
1539 struct mld_msg
*mld
;
1540 if (!pskb_may_pull(skb2
, sizeof(*mld
))) {
1544 mld
= (struct mld_msg
*)skb_transport_header(skb2
);
1545 BR_INPUT_SKB_CB(skb2
)->mrouters_only
= 1;
1546 err
= br_ip6_multicast_add_group(br
, port
, &mld
->mld_mca
);
1549 case ICMPV6_MLD2_REPORT
:
1550 err
= br_ip6_multicast_mld2_report(br
, port
, skb2
);
1552 case ICMPV6_MGM_QUERY
:
1553 err
= br_ip6_multicast_query(br
, port
, skb2
);
1555 case ICMPV6_MGM_REDUCTION
:
1557 struct mld_msg
*mld
;
1558 if (!pskb_may_pull(skb2
, sizeof(*mld
))) {
1562 mld
= (struct mld_msg
*)skb_transport_header(skb2
);
1563 br_ip6_multicast_leave_group(br
, port
, &mld
->mld_mca
);
1573 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
1574 struct sk_buff
*skb
)
1576 BR_INPUT_SKB_CB(skb
)->igmp
= 0;
1577 BR_INPUT_SKB_CB(skb
)->mrouters_only
= 0;
1579 if (br
->multicast_disabled
)
1582 switch (skb
->protocol
) {
1583 case htons(ETH_P_IP
):
1584 return br_multicast_ipv4_rcv(br
, port
, skb
);
1585 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1586 case htons(ETH_P_IPV6
):
1587 return br_multicast_ipv6_rcv(br
, port
, skb
);
1594 static void br_multicast_query_expired(unsigned long data
)
1596 struct net_bridge
*br
= (void *)data
;
1598 spin_lock(&br
->multicast_lock
);
1599 if (br
->multicast_startup_queries_sent
<
1600 br
->multicast_startup_query_count
)
1601 br
->multicast_startup_queries_sent
++;
1603 br_multicast_send_query(br
, NULL
, br
->multicast_startup_queries_sent
);
1605 spin_unlock(&br
->multicast_lock
);
1608 void br_multicast_init(struct net_bridge
*br
)
1610 br
->hash_elasticity
= 4;
1613 br
->multicast_router
= 1;
1614 br
->multicast_last_member_count
= 2;
1615 br
->multicast_startup_query_count
= 2;
1617 br
->multicast_last_member_interval
= HZ
;
1618 br
->multicast_query_response_interval
= 10 * HZ
;
1619 br
->multicast_startup_query_interval
= 125 * HZ
/ 4;
1620 br
->multicast_query_interval
= 125 * HZ
;
1621 br
->multicast_querier_interval
= 255 * HZ
;
1622 br
->multicast_membership_interval
= 260 * HZ
;
1624 spin_lock_init(&br
->multicast_lock
);
1625 setup_timer(&br
->multicast_router_timer
,
1626 br_multicast_local_router_expired
, 0);
1627 setup_timer(&br
->multicast_querier_timer
,
1628 br_multicast_local_router_expired
, 0);
1629 setup_timer(&br
->multicast_query_timer
, br_multicast_query_expired
,
1633 void br_multicast_open(struct net_bridge
*br
)
1635 br
->multicast_startup_queries_sent
= 0;
1637 if (br
->multicast_disabled
)
1640 mod_timer(&br
->multicast_query_timer
, jiffies
);
1643 void br_multicast_stop(struct net_bridge
*br
)
1645 struct net_bridge_mdb_htable
*mdb
;
1646 struct net_bridge_mdb_entry
*mp
;
1647 struct hlist_node
*p
, *n
;
1651 del_timer_sync(&br
->multicast_router_timer
);
1652 del_timer_sync(&br
->multicast_querier_timer
);
1653 del_timer_sync(&br
->multicast_query_timer
);
1655 spin_lock_bh(&br
->multicast_lock
);
1656 mdb
= mlock_dereference(br
->mdb
, br
);
1663 for (i
= 0; i
< mdb
->max
; i
++) {
1664 hlist_for_each_entry_safe(mp
, p
, n
, &mdb
->mhash
[i
],
1666 del_timer(&mp
->timer
);
1667 del_timer(&mp
->query_timer
);
1668 call_rcu_bh(&mp
->rcu
, br_multicast_free_group
);
1673 spin_unlock_bh(&br
->multicast_lock
);
1675 spin_lock_bh(&br
->multicast_lock
);
1680 call_rcu_bh(&mdb
->rcu
, br_mdb_free
);
1683 spin_unlock_bh(&br
->multicast_lock
);
1686 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
)
1690 spin_lock_bh(&br
->multicast_lock
);
1691 if (!netif_running(br
->dev
))
1697 del_timer(&br
->multicast_router_timer
);
1700 br
->multicast_router
= val
;
1710 spin_unlock_bh(&br
->multicast_lock
);
1715 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
)
1717 struct net_bridge
*br
= p
->br
;
1720 spin_lock(&br
->multicast_lock
);
1721 if (!netif_running(br
->dev
) || p
->state
== BR_STATE_DISABLED
)
1728 p
->multicast_router
= val
;
1731 if (val
< 2 && !hlist_unhashed(&p
->rlist
))
1732 hlist_del_init_rcu(&p
->rlist
);
1737 del_timer(&p
->multicast_router_timer
);
1742 br_multicast_add_router(br
, p
);
1751 spin_unlock(&br
->multicast_lock
);
1756 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
)
1758 struct net_bridge_port
*port
;
1760 struct net_bridge_mdb_htable
*mdb
;
1762 spin_lock(&br
->multicast_lock
);
1763 if (br
->multicast_disabled
== !val
)
1766 br
->multicast_disabled
= !val
;
1767 if (br
->multicast_disabled
)
1770 if (!netif_running(br
->dev
))
1773 mdb
= mlock_dereference(br
->mdb
, br
);
1778 br
->multicast_disabled
= !!val
;
1782 err
= br_mdb_rehash(&br
->mdb
, mdb
->max
,
1783 br
->hash_elasticity
);
1788 br_multicast_open(br
);
1789 list_for_each_entry(port
, &br
->port_list
, list
) {
1790 if (port
->state
== BR_STATE_DISABLED
||
1791 port
->state
== BR_STATE_BLOCKING
)
1794 __br_multicast_enable_port(port
);
1798 spin_unlock(&br
->multicast_lock
);
1803 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
)
1807 struct net_bridge_mdb_htable
*mdb
;
1809 spin_lock(&br
->multicast_lock
);
1810 if (!netif_running(br
->dev
))
1814 if (!is_power_of_2(val
))
1817 mdb
= mlock_dereference(br
->mdb
, br
);
1818 if (mdb
&& val
< mdb
->size
)
1834 err
= br_mdb_rehash(&br
->mdb
, br
->hash_max
,
1835 br
->hash_elasticity
);
1841 spin_unlock(&br
->multicast_lock
);