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>
26 #include <linux/inetdevice.h>
28 #if IS_ENABLED(CONFIG_IPV6)
31 #include <net/ip6_checksum.h>
34 #include "br_private.h"
36 static void br_multicast_start_querier(struct net_bridge
*br
,
37 struct bridge_mcast_query
*query
);
38 unsigned int br_mdb_rehash_seq
;
40 static inline int br_ip_equal(const struct br_ip
*a
, const struct br_ip
*b
)
42 if (a
->proto
!= b
->proto
)
48 return a
->u
.ip4
== b
->u
.ip4
;
49 #if IS_ENABLED(CONFIG_IPV6)
50 case htons(ETH_P_IPV6
):
51 return ipv6_addr_equal(&a
->u
.ip6
, &b
->u
.ip6
);
57 static inline int __br_ip4_hash(struct net_bridge_mdb_htable
*mdb
, __be32 ip
,
60 return jhash_2words((__force u32
)ip
, vid
, mdb
->secret
) & (mdb
->max
- 1);
63 #if IS_ENABLED(CONFIG_IPV6)
64 static inline int __br_ip6_hash(struct net_bridge_mdb_htable
*mdb
,
65 const struct in6_addr
*ip
,
68 return jhash_2words(ipv6_addr_hash(ip
), vid
,
69 mdb
->secret
) & (mdb
->max
- 1);
73 static inline int br_ip_hash(struct net_bridge_mdb_htable
*mdb
,
78 return __br_ip4_hash(mdb
, ip
->u
.ip4
, ip
->vid
);
79 #if IS_ENABLED(CONFIG_IPV6)
80 case htons(ETH_P_IPV6
):
81 return __br_ip6_hash(mdb
, &ip
->u
.ip6
, ip
->vid
);
87 static struct net_bridge_mdb_entry
*__br_mdb_ip_get(
88 struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
, int hash
)
90 struct net_bridge_mdb_entry
*mp
;
92 hlist_for_each_entry_rcu(mp
, &mdb
->mhash
[hash
], hlist
[mdb
->ver
]) {
93 if (br_ip_equal(&mp
->addr
, dst
))
100 struct net_bridge_mdb_entry
*br_mdb_ip_get(struct net_bridge_mdb_htable
*mdb
,
106 return __br_mdb_ip_get(mdb
, dst
, br_ip_hash(mdb
, dst
));
109 static struct net_bridge_mdb_entry
*br_mdb_ip4_get(
110 struct net_bridge_mdb_htable
*mdb
, __be32 dst
, __u16 vid
)
115 br_dst
.proto
= htons(ETH_P_IP
);
118 return br_mdb_ip_get(mdb
, &br_dst
);
121 #if IS_ENABLED(CONFIG_IPV6)
122 static struct net_bridge_mdb_entry
*br_mdb_ip6_get(
123 struct net_bridge_mdb_htable
*mdb
, const struct in6_addr
*dst
,
129 br_dst
.proto
= htons(ETH_P_IPV6
);
132 return br_mdb_ip_get(mdb
, &br_dst
);
136 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
137 struct sk_buff
*skb
, u16 vid
)
139 struct net_bridge_mdb_htable
*mdb
= rcu_dereference(br
->mdb
);
142 if (br
->multicast_disabled
)
145 if (BR_INPUT_SKB_CB(skb
)->igmp
)
148 ip
.proto
= skb
->protocol
;
151 switch (skb
->protocol
) {
152 case htons(ETH_P_IP
):
153 ip
.u
.ip4
= ip_hdr(skb
)->daddr
;
155 #if IS_ENABLED(CONFIG_IPV6)
156 case htons(ETH_P_IPV6
):
157 ip
.u
.ip6
= ipv6_hdr(skb
)->daddr
;
164 return br_mdb_ip_get(mdb
, &ip
);
167 static void br_mdb_free(struct rcu_head
*head
)
169 struct net_bridge_mdb_htable
*mdb
=
170 container_of(head
, struct net_bridge_mdb_htable
, rcu
);
171 struct net_bridge_mdb_htable
*old
= mdb
->old
;
178 static int br_mdb_copy(struct net_bridge_mdb_htable
*new,
179 struct net_bridge_mdb_htable
*old
,
182 struct net_bridge_mdb_entry
*mp
;
187 for (i
= 0; i
< old
->max
; i
++)
188 hlist_for_each_entry(mp
, &old
->mhash
[i
], hlist
[old
->ver
])
189 hlist_add_head(&mp
->hlist
[new->ver
],
190 &new->mhash
[br_ip_hash(new, &mp
->addr
)]);
196 for (i
= 0; i
< new->max
; i
++) {
198 hlist_for_each_entry(mp
, &new->mhash
[i
], hlist
[new->ver
])
204 return maxlen
> elasticity
? -EINVAL
: 0;
207 void br_multicast_free_pg(struct rcu_head
*head
)
209 struct net_bridge_port_group
*p
=
210 container_of(head
, struct net_bridge_port_group
, rcu
);
215 static void br_multicast_free_group(struct rcu_head
*head
)
217 struct net_bridge_mdb_entry
*mp
=
218 container_of(head
, struct net_bridge_mdb_entry
, rcu
);
223 static void br_multicast_group_expired(unsigned long data
)
225 struct net_bridge_mdb_entry
*mp
= (void *)data
;
226 struct net_bridge
*br
= mp
->br
;
227 struct net_bridge_mdb_htable
*mdb
;
229 spin_lock(&br
->multicast_lock
);
230 if (!netif_running(br
->dev
) || timer_pending(&mp
->timer
))
238 mdb
= mlock_dereference(br
->mdb
, br
);
240 hlist_del_rcu(&mp
->hlist
[mdb
->ver
]);
243 call_rcu_bh(&mp
->rcu
, br_multicast_free_group
);
246 spin_unlock(&br
->multicast_lock
);
249 static void br_multicast_del_pg(struct net_bridge
*br
,
250 struct net_bridge_port_group
*pg
)
252 struct net_bridge_mdb_htable
*mdb
;
253 struct net_bridge_mdb_entry
*mp
;
254 struct net_bridge_port_group
*p
;
255 struct net_bridge_port_group __rcu
**pp
;
257 mdb
= mlock_dereference(br
->mdb
, br
);
259 mp
= br_mdb_ip_get(mdb
, &pg
->addr
);
263 for (pp
= &mp
->ports
;
264 (p
= mlock_dereference(*pp
, br
)) != NULL
;
269 rcu_assign_pointer(*pp
, p
->next
);
270 hlist_del_init(&p
->mglist
);
271 del_timer(&p
->timer
);
272 call_rcu_bh(&p
->rcu
, br_multicast_free_pg
);
274 if (!mp
->ports
&& !mp
->mglist
&& mp
->timer_armed
&&
275 netif_running(br
->dev
))
276 mod_timer(&mp
->timer
, jiffies
);
284 static void br_multicast_port_group_expired(unsigned long data
)
286 struct net_bridge_port_group
*pg
= (void *)data
;
287 struct net_bridge
*br
= pg
->port
->br
;
289 spin_lock(&br
->multicast_lock
);
290 if (!netif_running(br
->dev
) || timer_pending(&pg
->timer
) ||
291 hlist_unhashed(&pg
->mglist
) || pg
->state
& MDB_PERMANENT
)
294 br_multicast_del_pg(br
, pg
);
297 spin_unlock(&br
->multicast_lock
);
300 static int br_mdb_rehash(struct net_bridge_mdb_htable __rcu
**mdbp
, int max
,
303 struct net_bridge_mdb_htable
*old
= rcu_dereference_protected(*mdbp
, 1);
304 struct net_bridge_mdb_htable
*mdb
;
307 mdb
= kmalloc(sizeof(*mdb
), GFP_ATOMIC
);
314 mdb
->mhash
= kzalloc(max
* sizeof(*mdb
->mhash
), GFP_ATOMIC
);
320 mdb
->size
= old
? old
->size
: 0;
321 mdb
->ver
= old
? old
->ver
^ 1 : 0;
323 if (!old
|| elasticity
)
324 get_random_bytes(&mdb
->secret
, sizeof(mdb
->secret
));
326 mdb
->secret
= old
->secret
;
331 err
= br_mdb_copy(mdb
, old
, elasticity
);
339 call_rcu_bh(&mdb
->rcu
, br_mdb_free
);
342 rcu_assign_pointer(*mdbp
, mdb
);
347 static struct sk_buff
*br_ip4_multicast_alloc_query(struct net_bridge
*br
,
355 skb
= netdev_alloc_skb_ip_align(br
->dev
, sizeof(*eth
) + sizeof(*iph
) +
360 skb
->protocol
= htons(ETH_P_IP
);
362 skb_reset_mac_header(skb
);
365 memcpy(eth
->h_source
, br
->dev
->dev_addr
, 6);
368 eth
->h_dest
[2] = 0x5e;
372 eth
->h_proto
= htons(ETH_P_IP
);
373 skb_put(skb
, sizeof(*eth
));
375 skb_set_network_header(skb
, skb
->len
);
381 iph
->tot_len
= htons(sizeof(*iph
) + sizeof(*ih
) + 4);
383 iph
->frag_off
= htons(IP_DF
);
385 iph
->protocol
= IPPROTO_IGMP
;
386 iph
->saddr
= br
->multicast_query_use_ifaddr
?
387 inet_select_addr(br
->dev
, 0, RT_SCOPE_LINK
) : 0;
388 iph
->daddr
= htonl(INADDR_ALLHOSTS_GROUP
);
389 ((u8
*)&iph
[1])[0] = IPOPT_RA
;
390 ((u8
*)&iph
[1])[1] = 4;
391 ((u8
*)&iph
[1])[2] = 0;
392 ((u8
*)&iph
[1])[3] = 0;
396 skb_set_transport_header(skb
, skb
->len
);
398 ih
->type
= IGMP_HOST_MEMBERSHIP_QUERY
;
399 ih
->code
= (group
? br
->multicast_last_member_interval
:
400 br
->multicast_query_response_interval
) /
401 (HZ
/ IGMP_TIMER_SCALE
);
404 ih
->csum
= ip_compute_csum((void *)ih
, sizeof(struct igmphdr
));
405 skb_put(skb
, sizeof(*ih
));
407 __skb_pull(skb
, sizeof(*eth
));
413 #if IS_ENABLED(CONFIG_IPV6)
414 static struct sk_buff
*br_ip6_multicast_alloc_query(struct net_bridge
*br
,
415 const struct in6_addr
*group
)
418 struct ipv6hdr
*ip6h
;
419 struct mld_msg
*mldq
;
422 unsigned long interval
;
424 skb
= netdev_alloc_skb_ip_align(br
->dev
, sizeof(*eth
) + sizeof(*ip6h
) +
429 skb
->protocol
= htons(ETH_P_IPV6
);
431 /* Ethernet header */
432 skb_reset_mac_header(skb
);
435 memcpy(eth
->h_source
, br
->dev
->dev_addr
, 6);
436 eth
->h_proto
= htons(ETH_P_IPV6
);
437 skb_put(skb
, sizeof(*eth
));
439 /* IPv6 header + HbH option */
440 skb_set_network_header(skb
, skb
->len
);
441 ip6h
= ipv6_hdr(skb
);
443 *(__force __be32
*)ip6h
= htonl(0x60000000);
444 ip6h
->payload_len
= htons(8 + sizeof(*mldq
));
445 ip6h
->nexthdr
= IPPROTO_HOPOPTS
;
447 ipv6_addr_set(&ip6h
->daddr
, htonl(0xff020000), 0, 0, htonl(1));
448 if (ipv6_dev_get_saddr(dev_net(br
->dev
), br
->dev
, &ip6h
->daddr
, 0,
453 ipv6_eth_mc_map(&ip6h
->daddr
, eth
->h_dest
);
455 hopopt
= (u8
*)(ip6h
+ 1);
456 hopopt
[0] = IPPROTO_ICMPV6
; /* next hdr */
457 hopopt
[1] = 0; /* length of HbH */
458 hopopt
[2] = IPV6_TLV_ROUTERALERT
; /* Router Alert */
459 hopopt
[3] = 2; /* Length of RA Option */
460 hopopt
[4] = 0; /* Type = 0x0000 (MLD) */
462 hopopt
[6] = IPV6_TLV_PAD1
; /* Pad1 */
463 hopopt
[7] = IPV6_TLV_PAD1
; /* Pad1 */
465 skb_put(skb
, sizeof(*ip6h
) + 8);
468 skb_set_transport_header(skb
, skb
->len
);
469 mldq
= (struct mld_msg
*) icmp6_hdr(skb
);
471 interval
= ipv6_addr_any(group
) ?
472 br
->multicast_query_response_interval
:
473 br
->multicast_last_member_interval
;
475 mldq
->mld_type
= ICMPV6_MGM_QUERY
;
478 mldq
->mld_maxdelay
= htons((u16
)jiffies_to_msecs(interval
));
479 mldq
->mld_reserved
= 0;
480 mldq
->mld_mca
= *group
;
483 mldq
->mld_cksum
= csum_ipv6_magic(&ip6h
->saddr
, &ip6h
->daddr
,
484 sizeof(*mldq
), IPPROTO_ICMPV6
,
487 skb_put(skb
, sizeof(*mldq
));
489 __skb_pull(skb
, sizeof(*eth
));
496 static struct sk_buff
*br_multicast_alloc_query(struct net_bridge
*br
,
499 switch (addr
->proto
) {
500 case htons(ETH_P_IP
):
501 return br_ip4_multicast_alloc_query(br
, addr
->u
.ip4
);
502 #if IS_ENABLED(CONFIG_IPV6)
503 case htons(ETH_P_IPV6
):
504 return br_ip6_multicast_alloc_query(br
, &addr
->u
.ip6
);
510 static struct net_bridge_mdb_entry
*br_multicast_get_group(
511 struct net_bridge
*br
, struct net_bridge_port
*port
,
512 struct br_ip
*group
, int hash
)
514 struct net_bridge_mdb_htable
*mdb
;
515 struct net_bridge_mdb_entry
*mp
;
516 unsigned int count
= 0;
521 mdb
= rcu_dereference_protected(br
->mdb
, 1);
522 hlist_for_each_entry(mp
, &mdb
->mhash
[hash
], hlist
[mdb
->ver
]) {
524 if (unlikely(br_ip_equal(group
, &mp
->addr
)))
531 if (unlikely(count
> br
->hash_elasticity
&& count
)) {
533 br_info(br
, "Multicast hash table "
534 "chain limit reached: %s\n",
535 port
? port
->dev
->name
: br
->dev
->name
);
537 elasticity
= br
->hash_elasticity
;
540 if (mdb
->size
>= max
) {
542 if (unlikely(max
> br
->hash_max
)) {
543 br_warn(br
, "Multicast hash table maximum of %d "
544 "reached, disabling snooping: %s\n",
546 port
? port
->dev
->name
: br
->dev
->name
);
549 br
->multicast_disabled
= 1;
554 if (max
> mdb
->max
|| elasticity
) {
557 br_info(br
, "Multicast hash table "
559 port
? port
->dev
->name
: br
->dev
->name
);
564 err
= br_mdb_rehash(&br
->mdb
, max
, elasticity
);
566 br_warn(br
, "Cannot rehash multicast "
567 "hash table, disabling snooping: %s, %d, %d\n",
568 port
? port
->dev
->name
: br
->dev
->name
,
584 struct net_bridge_mdb_entry
*br_multicast_new_group(struct net_bridge
*br
,
585 struct net_bridge_port
*port
, struct br_ip
*group
)
587 struct net_bridge_mdb_htable
*mdb
;
588 struct net_bridge_mdb_entry
*mp
;
592 mdb
= rcu_dereference_protected(br
->mdb
, 1);
594 err
= br_mdb_rehash(&br
->mdb
, BR_HASH_SIZE
, 0);
600 hash
= br_ip_hash(mdb
, group
);
601 mp
= br_multicast_get_group(br
, port
, group
, hash
);
602 switch (PTR_ERR(mp
)) {
608 mdb
= rcu_dereference_protected(br
->mdb
, 1);
609 hash
= br_ip_hash(mdb
, group
);
616 mp
= kzalloc(sizeof(*mp
), GFP_ATOMIC
);
618 return ERR_PTR(-ENOMEM
);
623 setup_timer(&mp
->timer
, br_multicast_group_expired
,
626 hlist_add_head_rcu(&mp
->hlist
[mdb
->ver
], &mdb
->mhash
[hash
]);
633 struct net_bridge_port_group
*br_multicast_new_port_group(
634 struct net_bridge_port
*port
,
636 struct net_bridge_port_group __rcu
*next
,
639 struct net_bridge_port_group
*p
;
641 p
= kzalloc(sizeof(*p
), GFP_ATOMIC
);
648 rcu_assign_pointer(p
->next
, next
);
649 hlist_add_head(&p
->mglist
, &port
->mglist
);
650 setup_timer(&p
->timer
, br_multicast_port_group_expired
,
655 static int br_multicast_add_group(struct net_bridge
*br
,
656 struct net_bridge_port
*port
,
659 struct net_bridge_mdb_entry
*mp
;
660 struct net_bridge_port_group
*p
;
661 struct net_bridge_port_group __rcu
**pp
;
664 spin_lock(&br
->multicast_lock
);
665 if (!netif_running(br
->dev
) ||
666 (port
&& port
->state
== BR_STATE_DISABLED
))
669 mp
= br_multicast_new_group(br
, port
, group
);
679 for (pp
= &mp
->ports
;
680 (p
= mlock_dereference(*pp
, br
)) != NULL
;
684 if ((unsigned long)p
->port
< (unsigned long)port
)
688 p
= br_multicast_new_port_group(port
, group
, *pp
, MDB_TEMPORARY
);
691 rcu_assign_pointer(*pp
, p
);
692 br_mdb_notify(br
->dev
, port
, group
, RTM_NEWMDB
);
698 spin_unlock(&br
->multicast_lock
);
702 static int br_ip4_multicast_add_group(struct net_bridge
*br
,
703 struct net_bridge_port
*port
,
707 struct br_ip br_group
;
709 if (ipv4_is_local_multicast(group
))
712 br_group
.u
.ip4
= group
;
713 br_group
.proto
= htons(ETH_P_IP
);
716 return br_multicast_add_group(br
, port
, &br_group
);
719 #if IS_ENABLED(CONFIG_IPV6)
720 static int br_ip6_multicast_add_group(struct net_bridge
*br
,
721 struct net_bridge_port
*port
,
722 const struct in6_addr
*group
,
725 struct br_ip br_group
;
727 if (!ipv6_is_transient_multicast(group
))
730 br_group
.u
.ip6
= *group
;
731 br_group
.proto
= htons(ETH_P_IPV6
);
734 return br_multicast_add_group(br
, port
, &br_group
);
738 static void br_multicast_router_expired(unsigned long data
)
740 struct net_bridge_port
*port
= (void *)data
;
741 struct net_bridge
*br
= port
->br
;
743 spin_lock(&br
->multicast_lock
);
744 if (port
->multicast_router
!= 1 ||
745 timer_pending(&port
->multicast_router_timer
) ||
746 hlist_unhashed(&port
->rlist
))
749 hlist_del_init_rcu(&port
->rlist
);
752 spin_unlock(&br
->multicast_lock
);
755 static void br_multicast_local_router_expired(unsigned long data
)
759 static void br_multicast_querier_expired(struct net_bridge
*br
,
760 struct bridge_mcast_query
*query
)
762 spin_lock(&br
->multicast_lock
);
763 if (!netif_running(br
->dev
) || br
->multicast_disabled
)
766 br_multicast_start_querier(br
, query
);
769 spin_unlock(&br
->multicast_lock
);
772 static void br_ip4_multicast_querier_expired(unsigned long data
)
774 struct net_bridge
*br
= (void *)data
;
776 br_multicast_querier_expired(br
, &br
->ip4_query
);
779 #if IS_ENABLED(CONFIG_IPV6)
780 static void br_ip6_multicast_querier_expired(unsigned long data
)
782 struct net_bridge
*br
= (void *)data
;
784 br_multicast_querier_expired(br
, &br
->ip6_query
);
788 static void __br_multicast_send_query(struct net_bridge
*br
,
789 struct net_bridge_port
*port
,
794 skb
= br_multicast_alloc_query(br
, ip
);
799 __skb_push(skb
, sizeof(struct ethhdr
));
800 skb
->dev
= port
->dev
;
801 NF_HOOK(NFPROTO_BRIDGE
, NF_BR_LOCAL_OUT
, skb
, NULL
, skb
->dev
,
807 static void br_multicast_send_query(struct net_bridge
*br
,
808 struct net_bridge_port
*port
,
809 struct bridge_mcast_query
*query
)
812 struct br_ip br_group
;
813 struct bridge_mcast_querier
*querier
= NULL
;
815 if (!netif_running(br
->dev
) || br
->multicast_disabled
||
816 !br
->multicast_querier
)
819 memset(&br_group
.u
, 0, sizeof(br_group
.u
));
821 if (port
? (query
== &port
->ip4_query
) :
822 (query
== &br
->ip4_query
)) {
823 querier
= &br
->ip4_querier
;
824 br_group
.proto
= htons(ETH_P_IP
);
825 #if IS_ENABLED(CONFIG_IPV6)
827 querier
= &br
->ip6_querier
;
828 br_group
.proto
= htons(ETH_P_IPV6
);
832 if (!querier
|| timer_pending(&querier
->timer
))
835 __br_multicast_send_query(br
, port
, &br_group
);
838 time
+= query
->startup_sent
< br
->multicast_startup_query_count
?
839 br
->multicast_startup_query_interval
:
840 br
->multicast_query_interval
;
841 mod_timer(&query
->timer
, time
);
844 static void br_multicast_port_query_expired(struct net_bridge_port
*port
,
845 struct bridge_mcast_query
*query
)
847 struct net_bridge
*br
= port
->br
;
849 spin_lock(&br
->multicast_lock
);
850 if (port
->state
== BR_STATE_DISABLED
||
851 port
->state
== BR_STATE_BLOCKING
)
854 if (query
->startup_sent
< br
->multicast_startup_query_count
)
855 query
->startup_sent
++;
857 br_multicast_send_query(port
->br
, port
, query
);
860 spin_unlock(&br
->multicast_lock
);
863 static void br_ip4_multicast_port_query_expired(unsigned long data
)
865 struct net_bridge_port
*port
= (void *)data
;
867 br_multicast_port_query_expired(port
, &port
->ip4_query
);
870 #if IS_ENABLED(CONFIG_IPV6)
871 static void br_ip6_multicast_port_query_expired(unsigned long data
)
873 struct net_bridge_port
*port
= (void *)data
;
875 br_multicast_port_query_expired(port
, &port
->ip6_query
);
879 void br_multicast_add_port(struct net_bridge_port
*port
)
881 port
->multicast_router
= 1;
883 setup_timer(&port
->multicast_router_timer
, br_multicast_router_expired
,
884 (unsigned long)port
);
885 setup_timer(&port
->ip4_query
.timer
, br_ip4_multicast_port_query_expired
,
886 (unsigned long)port
);
887 #if IS_ENABLED(CONFIG_IPV6)
888 setup_timer(&port
->ip6_query
.timer
, br_ip6_multicast_port_query_expired
,
889 (unsigned long)port
);
893 void br_multicast_del_port(struct net_bridge_port
*port
)
895 del_timer_sync(&port
->multicast_router_timer
);
898 static void br_multicast_enable(struct bridge_mcast_query
*query
)
900 query
->startup_sent
= 0;
902 if (try_to_del_timer_sync(&query
->timer
) >= 0 ||
903 del_timer(&query
->timer
))
904 mod_timer(&query
->timer
, jiffies
);
907 void br_multicast_enable_port(struct net_bridge_port
*port
)
909 struct net_bridge
*br
= port
->br
;
911 spin_lock(&br
->multicast_lock
);
912 if (br
->multicast_disabled
|| !netif_running(br
->dev
))
915 br_multicast_enable(&port
->ip4_query
);
916 #if IS_ENABLED(CONFIG_IPV6)
917 br_multicast_enable(&port
->ip6_query
);
921 spin_unlock(&br
->multicast_lock
);
924 void br_multicast_disable_port(struct net_bridge_port
*port
)
926 struct net_bridge
*br
= port
->br
;
927 struct net_bridge_port_group
*pg
;
928 struct hlist_node
*n
;
930 spin_lock(&br
->multicast_lock
);
931 hlist_for_each_entry_safe(pg
, n
, &port
->mglist
, mglist
)
932 br_multicast_del_pg(br
, pg
);
934 if (!hlist_unhashed(&port
->rlist
))
935 hlist_del_init_rcu(&port
->rlist
);
936 del_timer(&port
->multicast_router_timer
);
937 del_timer(&port
->ip4_query
.timer
);
938 #if IS_ENABLED(CONFIG_IPV6)
939 del_timer(&port
->ip6_query
.timer
);
941 spin_unlock(&br
->multicast_lock
);
944 static int br_ip4_multicast_igmp3_report(struct net_bridge
*br
,
945 struct net_bridge_port
*port
,
948 struct igmpv3_report
*ih
;
949 struct igmpv3_grec
*grec
;
958 if (!pskb_may_pull(skb
, sizeof(*ih
)))
961 br_vlan_get_tag(skb
, &vid
);
962 ih
= igmpv3_report_hdr(skb
);
963 num
= ntohs(ih
->ngrec
);
966 for (i
= 0; i
< num
; i
++) {
967 len
+= sizeof(*grec
);
968 if (!pskb_may_pull(skb
, len
))
971 grec
= (void *)(skb
->data
+ len
- sizeof(*grec
));
972 group
= grec
->grec_mca
;
973 type
= grec
->grec_type
;
975 len
+= ntohs(grec
->grec_nsrcs
) * 4;
976 if (!pskb_may_pull(skb
, len
))
979 /* We treat this as an IGMPv2 report for now. */
981 case IGMPV3_MODE_IS_INCLUDE
:
982 case IGMPV3_MODE_IS_EXCLUDE
:
983 case IGMPV3_CHANGE_TO_INCLUDE
:
984 case IGMPV3_CHANGE_TO_EXCLUDE
:
985 case IGMPV3_ALLOW_NEW_SOURCES
:
986 case IGMPV3_BLOCK_OLD_SOURCES
:
993 err
= br_ip4_multicast_add_group(br
, port
, group
, vid
);
1001 #if IS_ENABLED(CONFIG_IPV6)
1002 static int br_ip6_multicast_mld2_report(struct net_bridge
*br
,
1003 struct net_bridge_port
*port
,
1004 struct sk_buff
*skb
)
1006 struct icmp6hdr
*icmp6h
;
1007 struct mld2_grec
*grec
;
1014 if (!pskb_may_pull(skb
, sizeof(*icmp6h
)))
1017 br_vlan_get_tag(skb
, &vid
);
1018 icmp6h
= icmp6_hdr(skb
);
1019 num
= ntohs(icmp6h
->icmp6_dataun
.un_data16
[1]);
1020 len
= sizeof(*icmp6h
);
1022 for (i
= 0; i
< num
; i
++) {
1023 __be16
*nsrcs
, _nsrcs
;
1025 nsrcs
= skb_header_pointer(skb
,
1026 len
+ offsetof(struct mld2_grec
,
1028 sizeof(_nsrcs
), &_nsrcs
);
1032 if (!pskb_may_pull(skb
,
1033 len
+ sizeof(*grec
) +
1034 sizeof(struct in6_addr
) * ntohs(*nsrcs
)))
1037 grec
= (struct mld2_grec
*)(skb
->data
+ len
);
1038 len
+= sizeof(*grec
) +
1039 sizeof(struct in6_addr
) * ntohs(*nsrcs
);
1041 /* We treat these as MLDv1 reports for now. */
1042 switch (grec
->grec_type
) {
1043 case MLD2_MODE_IS_INCLUDE
:
1044 case MLD2_MODE_IS_EXCLUDE
:
1045 case MLD2_CHANGE_TO_INCLUDE
:
1046 case MLD2_CHANGE_TO_EXCLUDE
:
1047 case MLD2_ALLOW_NEW_SOURCES
:
1048 case MLD2_BLOCK_OLD_SOURCES
:
1055 err
= br_ip6_multicast_add_group(br
, port
, &grec
->grec_mca
,
1066 br_multicast_update_querier_timer(struct net_bridge
*br
,
1067 struct bridge_mcast_querier
*querier
,
1068 unsigned long max_delay
)
1070 if (!timer_pending(&querier
->timer
))
1071 querier
->delay_time
= jiffies
+ max_delay
;
1073 mod_timer(&querier
->timer
, jiffies
+ br
->multicast_querier_interval
);
1077 * Add port to router_list
1078 * list is maintained ordered by pointer value
1079 * and locked by br->multicast_lock and RCU
1081 static void br_multicast_add_router(struct net_bridge
*br
,
1082 struct net_bridge_port
*port
)
1084 struct net_bridge_port
*p
;
1085 struct hlist_node
*slot
= NULL
;
1087 hlist_for_each_entry(p
, &br
->router_list
, rlist
) {
1088 if ((unsigned long) port
>= (unsigned long) p
)
1094 hlist_add_after_rcu(slot
, &port
->rlist
);
1096 hlist_add_head_rcu(&port
->rlist
, &br
->router_list
);
1099 static void br_multicast_mark_router(struct net_bridge
*br
,
1100 struct net_bridge_port
*port
)
1102 unsigned long now
= jiffies
;
1105 if (br
->multicast_router
== 1)
1106 mod_timer(&br
->multicast_router_timer
,
1107 now
+ br
->multicast_querier_interval
);
1111 if (port
->multicast_router
!= 1)
1114 if (!hlist_unhashed(&port
->rlist
))
1117 br_multicast_add_router(br
, port
);
1120 mod_timer(&port
->multicast_router_timer
,
1121 now
+ br
->multicast_querier_interval
);
1124 static void br_multicast_query_received(struct net_bridge
*br
,
1125 struct net_bridge_port
*port
,
1126 struct bridge_mcast_querier
*querier
,
1128 unsigned long max_delay
)
1131 br_multicast_update_querier_timer(br
, querier
, max_delay
);
1132 else if (timer_pending(&querier
->timer
))
1135 br_multicast_mark_router(br
, port
);
1138 static int br_ip4_multicast_query(struct net_bridge
*br
,
1139 struct net_bridge_port
*port
,
1140 struct sk_buff
*skb
)
1142 const struct iphdr
*iph
= ip_hdr(skb
);
1143 struct igmphdr
*ih
= igmp_hdr(skb
);
1144 struct net_bridge_mdb_entry
*mp
;
1145 struct igmpv3_query
*ih3
;
1146 struct net_bridge_port_group
*p
;
1147 struct net_bridge_port_group __rcu
**pp
;
1148 unsigned long max_delay
;
1149 unsigned long now
= jiffies
;
1154 spin_lock(&br
->multicast_lock
);
1155 if (!netif_running(br
->dev
) ||
1156 (port
&& port
->state
== BR_STATE_DISABLED
))
1161 if (skb
->len
== sizeof(*ih
)) {
1162 max_delay
= ih
->code
* (HZ
/ IGMP_TIMER_SCALE
);
1165 max_delay
= 10 * HZ
;
1169 if (!pskb_may_pull(skb
, sizeof(struct igmpv3_query
))) {
1174 ih3
= igmpv3_query_hdr(skb
);
1178 max_delay
= ih3
->code
?
1179 IGMPV3_MRC(ih3
->code
) * (HZ
/ IGMP_TIMER_SCALE
) : 1;
1182 br_multicast_query_received(br
, port
, &br
->ip4_querier
, !!iph
->saddr
,
1188 br_vlan_get_tag(skb
, &vid
);
1189 mp
= br_mdb_ip4_get(mlock_dereference(br
->mdb
, br
), group
, vid
);
1193 mod_timer(&mp
->timer
, now
+ br
->multicast_membership_interval
);
1194 mp
->timer_armed
= true;
1196 max_delay
*= br
->multicast_last_member_count
;
1199 (timer_pending(&mp
->timer
) ?
1200 time_after(mp
->timer
.expires
, now
+ max_delay
) :
1201 try_to_del_timer_sync(&mp
->timer
) >= 0))
1202 mod_timer(&mp
->timer
, now
+ max_delay
);
1204 for (pp
= &mp
->ports
;
1205 (p
= mlock_dereference(*pp
, br
)) != NULL
;
1207 if (timer_pending(&p
->timer
) ?
1208 time_after(p
->timer
.expires
, now
+ max_delay
) :
1209 try_to_del_timer_sync(&p
->timer
) >= 0)
1210 mod_timer(&p
->timer
, now
+ max_delay
);
1214 spin_unlock(&br
->multicast_lock
);
1218 #if IS_ENABLED(CONFIG_IPV6)
1219 static int br_ip6_multicast_query(struct net_bridge
*br
,
1220 struct net_bridge_port
*port
,
1221 struct sk_buff
*skb
)
1223 const struct ipv6hdr
*ip6h
= ipv6_hdr(skb
);
1224 struct mld_msg
*mld
;
1225 struct net_bridge_mdb_entry
*mp
;
1226 struct mld2_query
*mld2q
;
1227 struct net_bridge_port_group
*p
;
1228 struct net_bridge_port_group __rcu
**pp
;
1229 unsigned long max_delay
;
1230 unsigned long now
= jiffies
;
1231 const struct in6_addr
*group
= NULL
;
1235 spin_lock(&br
->multicast_lock
);
1236 if (!netif_running(br
->dev
) ||
1237 (port
&& port
->state
== BR_STATE_DISABLED
))
1240 if (skb
->len
== sizeof(*mld
)) {
1241 if (!pskb_may_pull(skb
, sizeof(*mld
))) {
1245 mld
= (struct mld_msg
*) icmp6_hdr(skb
);
1246 max_delay
= msecs_to_jiffies(ntohs(mld
->mld_maxdelay
));
1248 group
= &mld
->mld_mca
;
1250 if (!pskb_may_pull(skb
, sizeof(*mld2q
))) {
1254 mld2q
= (struct mld2_query
*)icmp6_hdr(skb
);
1255 if (!mld2q
->mld2q_nsrcs
)
1256 group
= &mld2q
->mld2q_mca
;
1258 max_delay
= max(msecs_to_jiffies(MLDV2_MRC(ntohs(mld2q
->mld2q_mrc
))), 1UL);
1261 br_multicast_query_received(br
, port
, &br
->ip6_querier
,
1262 !ipv6_addr_any(&ip6h
->saddr
), max_delay
);
1267 br_vlan_get_tag(skb
, &vid
);
1268 mp
= br_mdb_ip6_get(mlock_dereference(br
->mdb
, br
), group
, vid
);
1272 mod_timer(&mp
->timer
, now
+ br
->multicast_membership_interval
);
1273 mp
->timer_armed
= true;
1275 max_delay
*= br
->multicast_last_member_count
;
1277 (timer_pending(&mp
->timer
) ?
1278 time_after(mp
->timer
.expires
, now
+ max_delay
) :
1279 try_to_del_timer_sync(&mp
->timer
) >= 0))
1280 mod_timer(&mp
->timer
, now
+ max_delay
);
1282 for (pp
= &mp
->ports
;
1283 (p
= mlock_dereference(*pp
, br
)) != NULL
;
1285 if (timer_pending(&p
->timer
) ?
1286 time_after(p
->timer
.expires
, now
+ max_delay
) :
1287 try_to_del_timer_sync(&p
->timer
) >= 0)
1288 mod_timer(&p
->timer
, now
+ max_delay
);
1292 spin_unlock(&br
->multicast_lock
);
1297 static void br_multicast_leave_group(struct net_bridge
*br
,
1298 struct net_bridge_port
*port
,
1299 struct br_ip
*group
,
1300 struct bridge_mcast_querier
*querier
,
1301 struct bridge_mcast_query
*query
)
1303 struct net_bridge_mdb_htable
*mdb
;
1304 struct net_bridge_mdb_entry
*mp
;
1305 struct net_bridge_port_group
*p
;
1309 spin_lock(&br
->multicast_lock
);
1310 if (!netif_running(br
->dev
) ||
1311 (port
&& port
->state
== BR_STATE_DISABLED
) ||
1312 timer_pending(&querier
->timer
))
1315 mdb
= mlock_dereference(br
->mdb
, br
);
1316 mp
= br_mdb_ip_get(mdb
, group
);
1320 if (br
->multicast_querier
) {
1321 __br_multicast_send_query(br
, port
, &mp
->addr
);
1323 time
= jiffies
+ br
->multicast_last_member_count
*
1324 br
->multicast_last_member_interval
;
1326 mod_timer(&query
->timer
, time
);
1328 for (p
= mlock_dereference(mp
->ports
, br
);
1330 p
= mlock_dereference(p
->next
, br
)) {
1331 if (p
->port
!= port
)
1334 if (!hlist_unhashed(&p
->mglist
) &&
1335 (timer_pending(&p
->timer
) ?
1336 time_after(p
->timer
.expires
, time
) :
1337 try_to_del_timer_sync(&p
->timer
) >= 0)) {
1338 mod_timer(&p
->timer
, time
);
1345 if (port
&& (port
->flags
& BR_MULTICAST_FAST_LEAVE
)) {
1346 struct net_bridge_port_group __rcu
**pp
;
1348 for (pp
= &mp
->ports
;
1349 (p
= mlock_dereference(*pp
, br
)) != NULL
;
1351 if (p
->port
!= port
)
1354 rcu_assign_pointer(*pp
, p
->next
);
1355 hlist_del_init(&p
->mglist
);
1356 del_timer(&p
->timer
);
1357 call_rcu_bh(&p
->rcu
, br_multicast_free_pg
);
1358 br_mdb_notify(br
->dev
, port
, group
, RTM_DELMDB
);
1360 if (!mp
->ports
&& !mp
->mglist
&& mp
->timer_armed
&&
1361 netif_running(br
->dev
))
1362 mod_timer(&mp
->timer
, jiffies
);
1368 time
= now
+ br
->multicast_last_member_count
*
1369 br
->multicast_last_member_interval
;
1372 if (mp
->mglist
&& mp
->timer_armed
&&
1373 (timer_pending(&mp
->timer
) ?
1374 time_after(mp
->timer
.expires
, time
) :
1375 try_to_del_timer_sync(&mp
->timer
) >= 0)) {
1376 mod_timer(&mp
->timer
, time
);
1380 spin_unlock(&br
->multicast_lock
);
1383 static void br_ip4_multicast_leave_group(struct net_bridge
*br
,
1384 struct net_bridge_port
*port
,
1388 struct br_ip br_group
;
1389 struct bridge_mcast_query
*query
= port
? &port
->ip4_query
:
1392 if (ipv4_is_local_multicast(group
))
1395 br_group
.u
.ip4
= group
;
1396 br_group
.proto
= htons(ETH_P_IP
);
1399 br_multicast_leave_group(br
, port
, &br_group
, &br
->ip4_querier
, query
);
1402 #if IS_ENABLED(CONFIG_IPV6)
1403 static void br_ip6_multicast_leave_group(struct net_bridge
*br
,
1404 struct net_bridge_port
*port
,
1405 const struct in6_addr
*group
,
1408 struct br_ip br_group
;
1409 struct bridge_mcast_query
*query
= port
? &port
->ip6_query
:
1413 if (!ipv6_is_transient_multicast(group
))
1416 br_group
.u
.ip6
= *group
;
1417 br_group
.proto
= htons(ETH_P_IPV6
);
1420 br_multicast_leave_group(br
, port
, &br_group
, &br
->ip6_querier
, query
);
1424 static int br_multicast_ipv4_rcv(struct net_bridge
*br
,
1425 struct net_bridge_port
*port
,
1426 struct sk_buff
*skb
)
1428 struct sk_buff
*skb2
= skb
;
1429 const struct iphdr
*iph
;
1432 unsigned int offset
;
1436 /* We treat OOM as packet loss for now. */
1437 if (!pskb_may_pull(skb
, sizeof(*iph
)))
1442 if (iph
->ihl
< 5 || iph
->version
!= 4)
1445 if (!pskb_may_pull(skb
, ip_hdrlen(skb
)))
1450 if (unlikely(ip_fast_csum((u8
*)iph
, iph
->ihl
)))
1453 if (iph
->protocol
!= IPPROTO_IGMP
) {
1454 if (!ipv4_is_local_multicast(iph
->daddr
))
1455 BR_INPUT_SKB_CB(skb
)->mrouters_only
= 1;
1459 len
= ntohs(iph
->tot_len
);
1460 if (skb
->len
< len
|| len
< ip_hdrlen(skb
))
1463 if (skb
->len
> len
) {
1464 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1468 err
= pskb_trim_rcsum(skb2
, len
);
1473 len
-= ip_hdrlen(skb2
);
1474 offset
= skb_network_offset(skb2
) + ip_hdrlen(skb2
);
1475 __skb_pull(skb2
, offset
);
1476 skb_reset_transport_header(skb2
);
1479 if (!pskb_may_pull(skb2
, sizeof(*ih
)))
1482 switch (skb2
->ip_summed
) {
1483 case CHECKSUM_COMPLETE
:
1484 if (!csum_fold(skb2
->csum
))
1489 if (skb_checksum_complete(skb2
))
1495 br_vlan_get_tag(skb2
, &vid
);
1496 BR_INPUT_SKB_CB(skb
)->igmp
= 1;
1497 ih
= igmp_hdr(skb2
);
1500 case IGMP_HOST_MEMBERSHIP_REPORT
:
1501 case IGMPV2_HOST_MEMBERSHIP_REPORT
:
1502 BR_INPUT_SKB_CB(skb
)->mrouters_only
= 1;
1503 err
= br_ip4_multicast_add_group(br
, port
, ih
->group
, vid
);
1505 case IGMPV3_HOST_MEMBERSHIP_REPORT
:
1506 err
= br_ip4_multicast_igmp3_report(br
, port
, skb2
);
1508 case IGMP_HOST_MEMBERSHIP_QUERY
:
1509 err
= br_ip4_multicast_query(br
, port
, skb2
);
1511 case IGMP_HOST_LEAVE_MESSAGE
:
1512 br_ip4_multicast_leave_group(br
, port
, ih
->group
, vid
);
1517 __skb_push(skb2
, offset
);
1524 #if IS_ENABLED(CONFIG_IPV6)
1525 static int br_multicast_ipv6_rcv(struct net_bridge
*br
,
1526 struct net_bridge_port
*port
,
1527 struct sk_buff
*skb
)
1529 struct sk_buff
*skb2
;
1530 const struct ipv6hdr
*ip6h
;
1539 if (!pskb_may_pull(skb
, sizeof(*ip6h
)))
1542 ip6h
= ipv6_hdr(skb
);
1545 * We're interested in MLD messages only.
1547 * - MLD has always Router Alert hop-by-hop option
1548 * - But we do not support jumbrograms.
1550 if (ip6h
->version
!= 6 ||
1551 ip6h
->nexthdr
!= IPPROTO_HOPOPTS
||
1552 ip6h
->payload_len
== 0)
1555 len
= ntohs(ip6h
->payload_len
) + sizeof(*ip6h
);
1559 nexthdr
= ip6h
->nexthdr
;
1560 offset
= ipv6_skip_exthdr(skb
, sizeof(*ip6h
), &nexthdr
, &frag_off
);
1562 if (offset
< 0 || nexthdr
!= IPPROTO_ICMPV6
)
1565 /* Okay, we found ICMPv6 header */
1566 skb2
= skb_clone(skb
, GFP_ATOMIC
);
1571 if (!pskb_may_pull(skb2
, offset
+ sizeof(struct icmp6hdr
)))
1574 len
-= offset
- skb_network_offset(skb2
);
1576 __skb_pull(skb2
, offset
);
1577 skb_reset_transport_header(skb2
);
1578 skb_postpull_rcsum(skb2
, skb_network_header(skb2
),
1579 skb_network_header_len(skb2
));
1581 icmp6_type
= icmp6_hdr(skb2
)->icmp6_type
;
1583 switch (icmp6_type
) {
1584 case ICMPV6_MGM_QUERY
:
1585 case ICMPV6_MGM_REPORT
:
1586 case ICMPV6_MGM_REDUCTION
:
1587 case ICMPV6_MLD2_REPORT
:
1594 /* Okay, we found MLD message. Check further. */
1595 if (skb2
->len
> len
) {
1596 err
= pskb_trim_rcsum(skb2
, len
);
1602 ip6h
= ipv6_hdr(skb2
);
1604 switch (skb2
->ip_summed
) {
1605 case CHECKSUM_COMPLETE
:
1606 if (!csum_ipv6_magic(&ip6h
->saddr
, &ip6h
->daddr
, skb2
->len
,
1607 IPPROTO_ICMPV6
, skb2
->csum
))
1611 skb2
->csum
= ~csum_unfold(csum_ipv6_magic(&ip6h
->saddr
,
1614 IPPROTO_ICMPV6
, 0));
1615 if (__skb_checksum_complete(skb2
))
1621 br_vlan_get_tag(skb
, &vid
);
1622 BR_INPUT_SKB_CB(skb
)->igmp
= 1;
1624 switch (icmp6_type
) {
1625 case ICMPV6_MGM_REPORT
:
1627 struct mld_msg
*mld
;
1628 if (!pskb_may_pull(skb2
, sizeof(*mld
))) {
1632 mld
= (struct mld_msg
*)skb_transport_header(skb2
);
1633 BR_INPUT_SKB_CB(skb
)->mrouters_only
= 1;
1634 err
= br_ip6_multicast_add_group(br
, port
, &mld
->mld_mca
, vid
);
1637 case ICMPV6_MLD2_REPORT
:
1638 err
= br_ip6_multicast_mld2_report(br
, port
, skb2
);
1640 case ICMPV6_MGM_QUERY
:
1641 err
= br_ip6_multicast_query(br
, port
, skb2
);
1643 case ICMPV6_MGM_REDUCTION
:
1645 struct mld_msg
*mld
;
1646 if (!pskb_may_pull(skb2
, sizeof(*mld
))) {
1650 mld
= (struct mld_msg
*)skb_transport_header(skb2
);
1651 br_ip6_multicast_leave_group(br
, port
, &mld
->mld_mca
, vid
);
1661 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
1662 struct sk_buff
*skb
)
1664 BR_INPUT_SKB_CB(skb
)->igmp
= 0;
1665 BR_INPUT_SKB_CB(skb
)->mrouters_only
= 0;
1667 if (br
->multicast_disabled
)
1670 switch (skb
->protocol
) {
1671 case htons(ETH_P_IP
):
1672 return br_multicast_ipv4_rcv(br
, port
, skb
);
1673 #if IS_ENABLED(CONFIG_IPV6)
1674 case htons(ETH_P_IPV6
):
1675 return br_multicast_ipv6_rcv(br
, port
, skb
);
1682 static void br_multicast_query_expired(struct net_bridge
*br
,
1683 struct bridge_mcast_query
*query
)
1685 spin_lock(&br
->multicast_lock
);
1686 if (query
->startup_sent
< br
->multicast_startup_query_count
)
1687 query
->startup_sent
++;
1689 br_multicast_send_query(br
, NULL
, query
);
1690 spin_unlock(&br
->multicast_lock
);
1693 static void br_ip4_multicast_query_expired(unsigned long data
)
1695 struct net_bridge
*br
= (void *)data
;
1697 br_multicast_query_expired(br
, &br
->ip4_query
);
1700 #if IS_ENABLED(CONFIG_IPV6)
1701 static void br_ip6_multicast_query_expired(unsigned long data
)
1703 struct net_bridge
*br
= (void *)data
;
1705 br_multicast_query_expired(br
, &br
->ip6_query
);
1709 void br_multicast_init(struct net_bridge
*br
)
1711 br
->hash_elasticity
= 4;
1714 br
->multicast_router
= 1;
1715 br
->multicast_querier
= 0;
1716 br
->multicast_query_use_ifaddr
= 0;
1717 br
->multicast_last_member_count
= 2;
1718 br
->multicast_startup_query_count
= 2;
1720 br
->multicast_last_member_interval
= HZ
;
1721 br
->multicast_query_response_interval
= 10 * HZ
;
1722 br
->multicast_startup_query_interval
= 125 * HZ
/ 4;
1723 br
->multicast_query_interval
= 125 * HZ
;
1724 br
->multicast_querier_interval
= 255 * HZ
;
1725 br
->multicast_membership_interval
= 260 * HZ
;
1727 br
->ip4_querier
.delay_time
= 0;
1728 #if IS_ENABLED(CONFIG_IPV6)
1729 br
->ip6_querier
.delay_time
= 0;
1732 spin_lock_init(&br
->multicast_lock
);
1733 setup_timer(&br
->multicast_router_timer
,
1734 br_multicast_local_router_expired
, 0);
1735 setup_timer(&br
->ip4_querier
.timer
, br_ip4_multicast_querier_expired
,
1737 setup_timer(&br
->ip4_query
.timer
, br_ip4_multicast_query_expired
,
1739 #if IS_ENABLED(CONFIG_IPV6)
1740 setup_timer(&br
->ip6_querier
.timer
, br_ip6_multicast_querier_expired
,
1742 setup_timer(&br
->ip6_query
.timer
, br_ip6_multicast_query_expired
,
1747 static void __br_multicast_open(struct net_bridge
*br
,
1748 struct bridge_mcast_query
*query
)
1750 query
->startup_sent
= 0;
1752 if (br
->multicast_disabled
)
1755 mod_timer(&query
->timer
, jiffies
);
1758 void br_multicast_open(struct net_bridge
*br
)
1760 __br_multicast_open(br
, &br
->ip4_query
);
1761 #if IS_ENABLED(CONFIG_IPV6)
1762 __br_multicast_open(br
, &br
->ip6_query
);
1766 void br_multicast_stop(struct net_bridge
*br
)
1768 struct net_bridge_mdb_htable
*mdb
;
1769 struct net_bridge_mdb_entry
*mp
;
1770 struct hlist_node
*n
;
1774 del_timer_sync(&br
->multicast_router_timer
);
1775 del_timer_sync(&br
->ip4_querier
.timer
);
1776 del_timer_sync(&br
->ip4_query
.timer
);
1777 #if IS_ENABLED(CONFIG_IPV6)
1778 del_timer_sync(&br
->ip6_querier
.timer
);
1779 del_timer_sync(&br
->ip6_query
.timer
);
1782 spin_lock_bh(&br
->multicast_lock
);
1783 mdb
= mlock_dereference(br
->mdb
, br
);
1790 for (i
= 0; i
< mdb
->max
; i
++) {
1791 hlist_for_each_entry_safe(mp
, n
, &mdb
->mhash
[i
],
1793 del_timer(&mp
->timer
);
1794 mp
->timer_armed
= false;
1795 call_rcu_bh(&mp
->rcu
, br_multicast_free_group
);
1800 spin_unlock_bh(&br
->multicast_lock
);
1802 spin_lock_bh(&br
->multicast_lock
);
1807 call_rcu_bh(&mdb
->rcu
, br_mdb_free
);
1810 spin_unlock_bh(&br
->multicast_lock
);
1813 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
)
1817 spin_lock_bh(&br
->multicast_lock
);
1818 if (!netif_running(br
->dev
))
1824 del_timer(&br
->multicast_router_timer
);
1827 br
->multicast_router
= val
;
1837 spin_unlock_bh(&br
->multicast_lock
);
1842 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
)
1844 struct net_bridge
*br
= p
->br
;
1847 spin_lock(&br
->multicast_lock
);
1848 if (!netif_running(br
->dev
) || p
->state
== BR_STATE_DISABLED
)
1855 p
->multicast_router
= val
;
1858 if (val
< 2 && !hlist_unhashed(&p
->rlist
))
1859 hlist_del_init_rcu(&p
->rlist
);
1864 del_timer(&p
->multicast_router_timer
);
1869 br_multicast_add_router(br
, p
);
1878 spin_unlock(&br
->multicast_lock
);
1883 static void br_multicast_start_querier(struct net_bridge
*br
,
1884 struct bridge_mcast_query
*query
)
1886 struct net_bridge_port
*port
;
1888 __br_multicast_open(br
, query
);
1890 list_for_each_entry(port
, &br
->port_list
, list
) {
1891 if (port
->state
== BR_STATE_DISABLED
||
1892 port
->state
== BR_STATE_BLOCKING
)
1895 if (query
== &br
->ip4_query
)
1896 br_multicast_enable(&port
->ip4_query
);
1897 #if IS_ENABLED(CONFIG_IPV6)
1899 br_multicast_enable(&port
->ip6_query
);
1904 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
)
1907 struct net_bridge_mdb_htable
*mdb
;
1909 spin_lock_bh(&br
->multicast_lock
);
1910 if (br
->multicast_disabled
== !val
)
1913 br
->multicast_disabled
= !val
;
1914 if (br
->multicast_disabled
)
1917 if (!netif_running(br
->dev
))
1920 mdb
= mlock_dereference(br
->mdb
, br
);
1925 br
->multicast_disabled
= !!val
;
1929 err
= br_mdb_rehash(&br
->mdb
, mdb
->max
,
1930 br
->hash_elasticity
);
1935 br_multicast_start_querier(br
, &br
->ip4_query
);
1936 #if IS_ENABLED(CONFIG_IPV6)
1937 br_multicast_start_querier(br
, &br
->ip6_query
);
1941 spin_unlock_bh(&br
->multicast_lock
);
1946 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
)
1948 unsigned long max_delay
;
1952 spin_lock_bh(&br
->multicast_lock
);
1953 if (br
->multicast_querier
== val
)
1956 br
->multicast_querier
= val
;
1960 max_delay
= br
->multicast_query_response_interval
;
1962 if (!timer_pending(&br
->ip4_querier
.timer
))
1963 br
->ip4_querier
.delay_time
= jiffies
+ max_delay
;
1965 br_multicast_start_querier(br
, &br
->ip4_query
);
1967 #if IS_ENABLED(CONFIG_IPV6)
1968 if (!timer_pending(&br
->ip6_querier
.timer
))
1969 br
->ip6_querier
.delay_time
= jiffies
+ max_delay
;
1971 br_multicast_start_querier(br
, &br
->ip6_query
);
1975 spin_unlock_bh(&br
->multicast_lock
);
1980 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
)
1984 struct net_bridge_mdb_htable
*mdb
;
1986 spin_lock(&br
->multicast_lock
);
1987 if (!netif_running(br
->dev
))
1991 if (!is_power_of_2(val
))
1994 mdb
= mlock_dereference(br
->mdb
, br
);
1995 if (mdb
&& val
< mdb
->size
)
2011 err
= br_mdb_rehash(&br
->mdb
, br
->hash_max
,
2012 br
->hash_elasticity
);
2018 spin_unlock(&br
->multicast_lock
);