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net: bridge: mcast: add support for src list and filter mode dumping
[linux-2.6-block.git] / net / bridge / br_multicast.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
eb1d1641
HX		 2/*
3 * Bridge multicast support.
4 *
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
eb1d1641
HX		 6 */
7
8#include <linux/err.h>
07f8ac4a 9#include <linux/export.h>
eb1d1641
HX		 10#include <linux/if_ether.h>
11#include <linux/igmp.h>
4b3087c7 12#include <linux/in.h>
eb1d1641
HX		 13#include <linux/jhash.h>
14#include <linux/kernel.h>
b195167f 15#include <linux/log2.h>
eb1d1641
HX		 16#include <linux/netdevice.h>
17#include <linux/netfilter_bridge.h>
18#include <linux/random.h>
19#include <linux/rculist.h>
20#include <linux/skbuff.h>
21#include <linux/slab.h>
22#include <linux/timer.h>
1c8ad5bf 23#include <linux/inetdevice.h>
91b02d3d 24#include <linux/mroute.h>
eb1d1641 25#include <net/ip.h>
147c1e9b 26#include <net/switchdev.h>
dfd56b8b 27#if IS_ENABLED(CONFIG_IPV6)
4b3087c7 28#include <linux/icmpv6.h>
08b202b6
YH		 29#include <net/ipv6.h>
30#include <net/mld.h>
d4c4f07d 31#include <net/ip6_checksum.h>
3c3769e6 32#include <net/addrconf.h>
08b202b6 33#endif
eb1d1641
HX		 34
35#include "br_private.h"
36
19e3a9c9
NA		 37static const struct rhashtable_params br_mdb_rht_params = {
38 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
39 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
40 .key_len = sizeof(struct br_ip),
41 .automatic_shrinking = true,
19e3a9c9
NA		 42};
43
cc0fdd80 44static void br_multicast_start_querier(struct net_bridge *br,
90010b36 45 struct bridge_mcast_own_query *query);
754bc547
SA		 46static void br_multicast_add_router(struct net_bridge *br,
47 struct net_bridge_port *port);
bc8c20ac
SA		 48static void br_ip4_multicast_leave_group(struct net_bridge *br,
49 struct net_bridge_port *port,
50 __be32 group,
6db6f0ea
FF		 51 __u16 vid,
52 const unsigned char *src);
53
f12e7d95 54static void __del_port_router(struct net_bridge_port *p);
bc8c20ac
SA		 55#if IS_ENABLED(CONFIG_IPV6)
56static void br_ip6_multicast_leave_group(struct net_bridge *br,
57 struct net_bridge_port *port,
58 const struct in6_addr *group,
6db6f0ea 59 __u16 vid, const unsigned char *src);
bc8c20ac 60#endif
c83b8fab 61
19e3a9c9
NA		 62static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
63 struct br_ip *dst)
08b202b6 64{
19e3a9c9 65 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 66}
08b202b6 67
19e3a9c9
NA		 68struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
69 struct br_ip *dst)
eb1d1641 70{
19e3a9c9 71 struct net_bridge_mdb_entry *ent;
eb1d1641 72
19e3a9c9 73 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 74
19e3a9c9
NA		 75 rcu_read_lock();
76 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
77 rcu_read_unlock();
7f285fa7 78
19e3a9c9 79 return ent;
7f285fa7
HX		 80}
81
19e3a9c9
NA		 82static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
83 __be32 dst, __u16 vid)
eb1d1641 84{
8ef2a9a5
YH		 85 struct br_ip br_dst;
86
19e3a9c9 87 memset(&br_dst, 0, sizeof(br_dst));
8ef2a9a5
YH		 88 br_dst.u.ip4 = dst;
89 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 90 br_dst.vid = vid;
0821ec55 91
19e3a9c9 92 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 93}
94
dfd56b8b 95#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 96static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
97 const struct in6_addr *dst,
98 __u16 vid)
08b202b6
YH		 99{
100 struct br_ip br_dst;
0821ec55 101
19e3a9c9 102 memset(&br_dst, 0, sizeof(br_dst));
4e3fd7a0 103 br_dst.u.ip6 = *dst;
08b202b6 104 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 105 br_dst.vid = vid;
08b202b6 106
19e3a9c9 107 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 108}
109#endif
110
eb1d1641 111struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 112 struct sk_buff *skb, u16 vid)
eb1d1641 113{
8ef2a9a5
YH		 114 struct br_ip ip;
115
13cefad2 116 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 117 return NULL;
118
8ef2a9a5 119 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 120 return NULL;
121
19e3a9c9 122 memset(&ip, 0, sizeof(ip));
8ef2a9a5 123 ip.proto = skb->protocol;
fbca58a2 124 ip.vid = vid;
8ef2a9a5 125
eb1d1641
HX		 126 switch (skb->protocol) {
127 case htons(ETH_P_IP):
8ef2a9a5
YH		 128 ip.u.ip4 = ip_hdr(skb)->daddr;
129 break;
dfd56b8b 130#if IS_ENABLED(CONFIG_IPV6)
08b202b6 131 case htons(ETH_P_IPV6):
4e3fd7a0 132 ip.u.ip6 = ipv6_hdr(skb)->daddr;
08b202b6
YH		 133 break;
134#endif
8ef2a9a5
YH		 135 default:
136 return NULL;
eb1d1641
HX		 137 }
138
19e3a9c9 139 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 140}
141
88c1f37f 142static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 143{
88c1f37f 144 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 145 struct net_bridge *br = mp->br;
eb1d1641
HX		 146
147 spin_lock(&br->multicast_lock);
148 if (!netif_running(br->dev) || timer_pending(&mp->timer))
149 goto out;
150
1bc844ee 151 br_multicast_host_leave(mp, true);
eb1d1641
HX		 152
153 if (mp->ports)
154 goto out;
155
19e3a9c9
NA		 156 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
157 br_mdb_rht_params);
158 hlist_del_rcu(&mp->mdb_node);
eb1d1641 159
4329596c 160 kfree_rcu(mp, rcu);
eb1d1641
HX		 161
162out:
163 spin_unlock(&br->multicast_lock);
164}
165
8b671779
NA		 166static void br_multicast_del_group_src(struct net_bridge_group_src *src)
167{
168 struct net_bridge *br = src->pg->port->br;
169
170 hlist_del_init_rcu(&src->node);
171 src->pg->src_ents--;
172 hlist_add_head(&src->del_node, &br->src_gc_list);
173 queue_work(system_long_wq, &br->src_gc_work);
174}
175
681590bd
NA		 176void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
177 struct net_bridge_port_group *pg,
178 struct net_bridge_port_group __rcu **pp)
179{
180 struct net_bridge *br = pg->port->br;
8b671779
NA		 181 struct net_bridge_group_src *ent;
182 struct hlist_node *tmp;
681590bd
NA		 183
184 rcu_assign_pointer(*pp, pg->next);
185 hlist_del_init(&pg->mglist);
186 del_timer(&pg->timer);
8b671779
NA		 187 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
188 br_multicast_del_group_src(ent);
681590bd
NA		 189 br_mdb_notify(br->dev, pg->port, &pg->addr, RTM_DELMDB, pg->flags);
190 kfree_rcu(pg, rcu);
191
192 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
193 mod_timer(&mp->timer, jiffies);
194}
195
196static void br_multicast_find_del_pg(struct net_bridge *br,
197 struct net_bridge_port_group *pg)
eb1d1641 198{
8b671779 199 struct net_bridge_port_group __rcu **pp;
eb1d1641
HX		 200 struct net_bridge_mdb_entry *mp;
201 struct net_bridge_port_group *p;
e8051688 202
19e3a9c9 203 mp = br_mdb_ip_get(br, &pg->addr);
eb1d1641
HX		 204 if (WARN_ON(!mp))
205 return;
206
e8051688
ED		 207 for (pp = &mp->ports;
208 (p = mlock_dereference(*pp, br)) != NULL;
209 pp = &p->next) {
eb1d1641
HX		 210 if (p != pg)
211 continue;
212
681590bd 213 br_multicast_del_pg(mp, pg, pp);
eb1d1641
HX		 214 return;
215 }
216
217 WARN_ON(1);
218}
219
88c1f37f 220static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 221{
88c1f37f 222 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
eb1d1641
HX		 223 struct net_bridge *br = pg->port->br;
224
225 spin_lock(&br->multicast_lock);
226 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 227 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 228 goto out;
229
681590bd 230 br_multicast_find_del_pg(br, pg);
eb1d1641
HX		 231
232out:
233 spin_unlock(&br->multicast_lock);
234}
235
8ef2a9a5 236static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 237 __be32 group,
238 u8 *igmp_type)
eb1d1641 239{
5e923585
NA		 240 struct igmpv3_query *ihv3;
241 size_t igmp_hdr_size;
eb1d1641
HX		 242 struct sk_buff *skb;
243 struct igmphdr *ih;
244 struct ethhdr *eth;
245 struct iphdr *iph;
246
5e923585
NA		 247 igmp_hdr_size = sizeof(*ih);
248 if (br->multicast_igmp_version == 3)
249 igmp_hdr_size = sizeof(*ihv3);
eb1d1641 250 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
5e923585 251 igmp_hdr_size + 4);
eb1d1641
HX		 252 if (!skb)
253 goto out;
254
255 skb->protocol = htons(ETH_P_IP);
256
257 skb_reset_mac_header(skb);
258 eth = eth_hdr(skb);
259
e5a727f6 260 ether_addr_copy(eth->h_source, br->dev->dev_addr);
eb1d1641
HX		 261 eth->h_dest[0] = 1;
262 eth->h_dest[1] = 0;
263 eth->h_dest[2] = 0x5e;
264 eth->h_dest[3] = 0;
265 eth->h_dest[4] = 0;
266 eth->h_dest[5] = 1;
267 eth->h_proto = htons(ETH_P_IP);
268 skb_put(skb, sizeof(*eth));
269
270 skb_set_network_header(skb, skb->len);
271 iph = ip_hdr(skb);
272
273 iph->version = 4;
274 iph->ihl = 6;
275 iph->tos = 0xc0;
5e923585 276 iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4);
eb1d1641
HX		 277 iph->id = 0;
278 iph->frag_off = htons(IP_DF);
279 iph->ttl = 1;
280 iph->protocol = IPPROTO_IGMP;
675779ad 281 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
1c8ad5bf 282 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
eb1d1641
HX		 283 iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
284 ((u8 *)&iph[1])[0] = IPOPT_RA;
285 ((u8 *)&iph[1])[1] = 4;
286 ((u8 *)&iph[1])[2] = 0;
287 ((u8 *)&iph[1])[3] = 0;
288 ip_send_check(iph);
289 skb_put(skb, 24);
290
291 skb_set_transport_header(skb, skb->len);
1080ab95 292 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 293
5e923585
NA		 294 switch (br->multicast_igmp_version) {
295 case 2:
296 ih = igmp_hdr(skb);
297 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
298 ih->code = (group ? br->multicast_last_member_interval :
299 br->multicast_query_response_interval) /
300 (HZ / IGMP_TIMER_SCALE);
301 ih->group = group;
302 ih->csum = 0;
303 ih->csum = ip_compute_csum((void *)ih, sizeof(*ih));
304 break;
305 case 3:
306 ihv3 = igmpv3_query_hdr(skb);
307 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
308 ihv3->code = (group ? br->multicast_last_member_interval :
309 br->multicast_query_response_interval) /
310 (HZ / IGMP_TIMER_SCALE);
311 ihv3->group = group;
312 ihv3->qqic = br->multicast_query_interval / HZ;
313 ihv3->nsrcs = 0;
314 ihv3->resv = 0;
315 ihv3->suppress = 0;
316 ihv3->qrv = 2;
317 ihv3->csum = 0;
318 ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3));
319 break;
320 }
321
322 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 323 __skb_pull(skb, sizeof(*eth));
324
325out:
326 return skb;
327}
328
dfd56b8b 329#if IS_ENABLED(CONFIG_IPV6)
08b202b6 330static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 331 const struct in6_addr *grp,
332 u8 *igmp_type)
08b202b6 333{
aa2ae3e7
NA		 334 struct mld2_query *mld2q;
335 unsigned long interval;
08b202b6
YH		 336 struct ipv6hdr *ip6h;
337 struct mld_msg *mldq;
aa2ae3e7
NA		 338 size_t mld_hdr_size;
339 struct sk_buff *skb;
08b202b6
YH		 340 struct ethhdr *eth;
341 u8 *hopopt;
08b202b6 342
aa2ae3e7
NA		 343 mld_hdr_size = sizeof(*mldq);
344 if (br->multicast_mld_version == 2)
345 mld_hdr_size = sizeof(*mld2q);
08b202b6 346 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
aa2ae3e7 347 8 + mld_hdr_size);
08b202b6
YH		 348 if (!skb)
349 goto out;
350
351 skb->protocol = htons(ETH_P_IPV6);
352
353 /* Ethernet header */
354 skb_reset_mac_header(skb);
355 eth = eth_hdr(skb);
356
e5a727f6 357 ether_addr_copy(eth->h_source, br->dev->dev_addr);
08b202b6
YH		 358 eth->h_proto = htons(ETH_P_IPV6);
359 skb_put(skb, sizeof(*eth));
360
361 /* IPv6 header + HbH option */
362 skb_set_network_header(skb, skb->len);
363 ip6h = ipv6_hdr(skb);
364
365 *(__force __be32 *)ip6h = htonl(0x60000000);
aa2ae3e7 366 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 367 ip6h->nexthdr = IPPROTO_HOPOPTS;
368 ip6h->hop_limit = 1;
a7bff75b 369 ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
d1d81d4c
UW		 370 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
371 &ip6h->saddr)) {
372 kfree_skb(skb);
675779ad 373 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 374 return NULL;
375 }
0888d5f3 376
675779ad 377 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 378 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 379
380 hopopt = (u8 *)(ip6h + 1);
381 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
382 hopopt[1] = 0; /* length of HbH */
383 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
384 hopopt[3] = 2; /* Length of RA Option */
385 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
386 hopopt[5] = 0;
1de5a71c
EZ		 387 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
388 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 389
390 skb_put(skb, sizeof(*ip6h) + 8);
391
392 /* ICMPv6 */
393 skb_set_transport_header(skb, skb->len);
1080ab95 394 interval = ipv6_addr_any(grp) ?
32de868c
LL		 395 br->multicast_query_response_interval :
396 br->multicast_last_member_interval;
1080ab95 397 *igmp_type = ICMPV6_MGM_QUERY;
aa2ae3e7
NA		 398 switch (br->multicast_mld_version) {
399 case 1:
400 mldq = (struct mld_msg *)icmp6_hdr(skb);
401 mldq->mld_type = ICMPV6_MGM_QUERY;
402 mldq->mld_code = 0;
403 mldq->mld_cksum = 0;
404 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
405 mldq->mld_reserved = 0;
406 mldq->mld_mca = *grp;
407 mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
408 sizeof(*mldq), IPPROTO_ICMPV6,
409 csum_partial(mldq,
410 sizeof(*mldq),
411 0));
412 break;
413 case 2:
414 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 415 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 416 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
417 mld2q->mld2q_code = 0;
418 mld2q->mld2q_cksum = 0;
419 mld2q->mld2q_resv1 = 0;
420 mld2q->mld2q_resv2 = 0;
421 mld2q->mld2q_suppress = 0;
422 mld2q->mld2q_qrv = 2;
423 mld2q->mld2q_nsrcs = 0;
424 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
425 mld2q->mld2q_mca = *grp;
426 mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
427 sizeof(*mld2q),
428 IPPROTO_ICMPV6,
429 csum_partial(mld2q,
430 sizeof(*mld2q),
431 0));
432 break;
433 }
434 skb_put(skb, mld_hdr_size);
08b202b6
YH		 435
436 __skb_pull(skb, sizeof(*eth));
437
438out:
439 return skb;
440}
441#endif
442
8ef2a9a5 443static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 444 struct br_ip *addr,
445 u8 *igmp_type)
8ef2a9a5
YH		 446{
447 switch (addr->proto) {
448 case htons(ETH_P_IP):
1080ab95 449 return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type);
dfd56b8b 450#if IS_ENABLED(CONFIG_IPV6)
08b202b6 451 case htons(ETH_P_IPV6):
1080ab95
NA		 452 return br_ip6_multicast_alloc_query(br, &addr->u.ip6,
453 igmp_type);
08b202b6 454#endif
8ef2a9a5
YH		 455 }
456 return NULL;
457}
458
cfd56754 459struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 460 struct br_ip *group)
eb1d1641 461{
eb1d1641 462 struct net_bridge_mdb_entry *mp;
4c0833bc 463 int err;
eb1d1641 464
19e3a9c9
NA		 465 mp = br_mdb_ip_get(br, group);
466 if (mp)
467 return mp;
eb1d1641 468
19e3a9c9
NA		 469 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
470 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
471 return ERR_PTR(-E2BIG);
eb1d1641
HX		 472 }
473
474 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
475 if (unlikely(!mp))
4c0833bc 476 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 477
478 mp->br = br;
8ef2a9a5 479 mp->addr = *group;
88c1f37f 480 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 481 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
482 br_mdb_rht_params);
483 if (err) {
484 kfree(mp);
485 mp = ERR_PTR(err);
486 } else {
487 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
488 }
1faabf2a 489
eb1d1641
HX		 490 return mp;
491}
492
8b671779
NA		 493static void br_multicast_group_src_expired(struct timer_list *t)
494{
495 struct net_bridge_group_src *src = from_timer(src, t, timer);
496 struct net_bridge_port_group *pg;
497 struct net_bridge *br = src->br;
498
499 spin_lock(&br->multicast_lock);
500 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
501 timer_pending(&src->timer))
502 goto out;
503
504 pg = src->pg;
505 if (pg->filter_mode == MCAST_INCLUDE) {
506 br_multicast_del_group_src(src);
507 if (!hlist_empty(&pg->src_list))
508 goto out;
509 br_multicast_find_del_pg(br, pg);
510 }
511out:
512 spin_unlock(&br->multicast_lock);
513}
514
515static struct net_bridge_group_src *
516br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
517{
518 struct net_bridge_group_src *ent;
519
520 switch (ip->proto) {
521 case htons(ETH_P_IP):
522 hlist_for_each_entry(ent, &pg->src_list, node)
523 if (ip->u.ip4 == ent->addr.u.ip4)
524 return ent;
525 break;
526#if IS_ENABLED(CONFIG_IPV6)
527 case htons(ETH_P_IPV6):
528 hlist_for_each_entry(ent, &pg->src_list, node)
529 if (!ipv6_addr_cmp(&ent->addr.u.ip6, &ip->u.ip6))
530 return ent;
531 break;
532#endif
533 }
534
535 return NULL;
536}
537
538static struct net_bridge_group_src *
539br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
540{
541 struct net_bridge_group_src *grp_src;
542
543 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
544 return NULL;
545
546 switch (src_ip->proto) {
547 case htons(ETH_P_IP):
548 if (ipv4_is_zeronet(src_ip->u.ip4) ||
549 ipv4_is_multicast(src_ip->u.ip4))
550 return NULL;
551 break;
552#if IS_ENABLED(CONFIG_IPV6)
553 case htons(ETH_P_IPV6):
554 if (ipv6_addr_any(&src_ip->u.ip6) ||
555 ipv6_addr_is_multicast(&src_ip->u.ip6))
556 return NULL;
557 break;
558#endif
559 }
560
561 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
562 if (unlikely(!grp_src))
563 return NULL;
564
565 grp_src->pg = pg;
566 grp_src->br = pg->port->br;
567 grp_src->addr = *src_ip;
568 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
569
570 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
571 pg->src_ents++;
572
573 return grp_src;
574}
575
cfd56754
CW		 576struct net_bridge_port_group *br_multicast_new_port_group(
577 struct net_bridge_port *port,
578 struct br_ip *group,
ccb1c31a 579 struct net_bridge_port_group __rcu *next,
6db6f0ea 580 unsigned char flags,
8b671779
NA		 581 const unsigned char *src,
582 u8 filter_mode)
cfd56754
CW		 583{
584 struct net_bridge_port_group *p;
585
586 p = kzalloc(sizeof(*p), GFP_ATOMIC);
587 if (unlikely(!p))
588 return NULL;
589
590 p->addr = *group;
591 p->port = port;
9d06b6d8 592 p->flags = flags;
8b671779
NA		 593 p->filter_mode = filter_mode;
594 INIT_HLIST_HEAD(&p->src_list);
eca2a43b 595 rcu_assign_pointer(p->next, next);
cfd56754 596 hlist_add_head(&p->mglist, &port->mglist);
88c1f37f 597 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
6db6f0ea
FF		 598
599 if (src)
600 memcpy(p->eth_addr, src, ETH_ALEN);
601 else
1bfe45f4 602 eth_broadcast_addr(p->eth_addr);
6db6f0ea 603
cfd56754
CW		 604 return p;
605}
606
6db6f0ea
FF		 607static bool br_port_group_equal(struct net_bridge_port_group *p,
608 struct net_bridge_port *port,
609 const unsigned char *src)
610{
611 if (p->port != port)
612 return false;
613
614 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
615 return true;
616
617 return ether_addr_equal(src, p->eth_addr);
618}
619
1bc844ee
NA		 620void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify)
621{
622 if (!mp->host_joined) {
623 mp->host_joined = true;
624 if (notify)
625 br_mdb_notify(mp->br->dev, NULL, &mp->addr,
626 RTM_NEWMDB, 0);
627 }
628 mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval);
629}
630
631void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
632{
633 if (!mp->host_joined)
634 return;
635
636 mp->host_joined = false;
637 if (notify)
638 br_mdb_notify(mp->br->dev, NULL, &mp->addr, RTM_DELMDB, 0);
639}
640
eb1d1641 641static int br_multicast_add_group(struct net_bridge *br,
8ef2a9a5 642 struct net_bridge_port *port,
6db6f0ea 643 struct br_ip *group,
8b671779
NA		 644 const unsigned char *src,
645 u8 filter_mode)
eb1d1641 646{
e8051688 647 struct net_bridge_port_group __rcu **pp;
5e923585
NA		 648 struct net_bridge_port_group *p;
649 struct net_bridge_mdb_entry *mp;
454594f3 650 unsigned long now = jiffies;
eb1d1641
HX		 651 int err;
652
eb1d1641
HX		 653 spin_lock(&br->multicast_lock);
654 if (!netif_running(br->dev) ||
655 (port && port->state == BR_STATE_DISABLED))
656 goto out;
657
19e3a9c9 658 mp = br_multicast_new_group(br, group);
eb1d1641 659 err = PTR_ERR(mp);
4c0833bc 660 if (IS_ERR(mp))
eb1d1641
HX		 661 goto err;
662
663 if (!port) {
1bc844ee 664 br_multicast_host_join(mp, true);
eb1d1641
HX		 665 goto out;
666 }
667
e8051688
ED		 668 for (pp = &mp->ports;
669 (p = mlock_dereference(*pp, br)) != NULL;
670 pp = &p->next) {
6db6f0ea 671 if (br_port_group_equal(p, port, src))
454594f3 672 goto found;
eb1d1641
HX		 673 if ((unsigned long)p->port < (unsigned long)port)
674 break;
675 }
676
8b671779 677 p = br_multicast_new_port_group(port, group, *pp, 0, src, filter_mode);
eb1d1641
HX		 678 if (unlikely(!p))
679 goto err;
eb1d1641 680 rcu_assign_pointer(*pp, p);
45ebcce5 681 br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0);
eb1d1641 682
454594f3
LL		 683found:
684 mod_timer(&p->timer, now + br->multicast_membership_interval);
eb1d1641
HX		 685out:
686 err = 0;
687
688err:
689 spin_unlock(&br->multicast_lock);
690 return err;
691}
692
8ef2a9a5
YH		 693static int br_ip4_multicast_add_group(struct net_bridge *br,
694 struct net_bridge_port *port,
b0e9a30d 695 __be32 group,
6db6f0ea 696 __u16 vid,
8b671779
NA		 697 const unsigned char *src,
698 bool igmpv2)
8ef2a9a5
YH		 699{
700 struct br_ip br_group;
8b671779 701 u8 filter_mode;
8ef2a9a5
YH		 702
703 if (ipv4_is_local_multicast(group))
704 return 0;
705
1515a63f 706 memset(&br_group, 0, sizeof(br_group));
8ef2a9a5
YH		 707 br_group.u.ip4 = group;
708 br_group.proto = htons(ETH_P_IP);
b0e9a30d 709 br_group.vid = vid;
8b671779 710 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
8ef2a9a5 711
8b671779 712 return br_multicast_add_group(br, port, &br_group, src, filter_mode);
8ef2a9a5
YH		 713}
714
dfd56b8b 715#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 716static int br_ip6_multicast_add_group(struct net_bridge *br,
717 struct net_bridge_port *port,
b0e9a30d 718 const struct in6_addr *group,
6db6f0ea 719 __u16 vid,
8b671779
NA		 720 const unsigned char *src,
721 bool mldv1)
08b202b6
YH		 722{
723 struct br_ip br_group;
8b671779 724 u8 filter_mode;
08b202b6 725
3c3769e6 726 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 727 return 0;
728
19e3a9c9 729 memset(&br_group, 0, sizeof(br_group));
4e3fd7a0 730 br_group.u.ip6 = *group;
9cc6e0c4 731 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 732 br_group.vid = vid;
8b671779 733 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
08b202b6 734
8b671779 735 return br_multicast_add_group(br, port, &br_group, src, filter_mode);
08b202b6
YH		 736}
737#endif
738
88c1f37f 739static void br_multicast_router_expired(struct timer_list *t)
eb1d1641 740{
88c1f37f
AP		 741 struct net_bridge_port *port =
742 from_timer(port, t, multicast_router_timer);
eb1d1641
HX		 743 struct net_bridge *br = port->br;
744
745 spin_lock(&br->multicast_lock);
a55d8246
NA		 746 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
747 port->multicast_router == MDB_RTR_TYPE_PERM ||
f12e7d95 748 timer_pending(&port->multicast_router_timer))
eb1d1641
HX		 749 goto out;
750
f12e7d95 751 __del_port_router(port);
eb1d1641
HX		 752out:
753 spin_unlock(&br->multicast_lock);
754}
755
77041420
YG		 756static void br_mc_router_state_change(struct net_bridge *p,
757 bool is_mc_router)
758{
759 struct switchdev_attr attr = {
760 .orig_dev = p->dev,
761 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
762 .flags = SWITCHDEV_F_DEFER,
763 .u.mrouter = is_mc_router,
764 };
765
766 switchdev_port_attr_set(p->dev, &attr);
767}
768
88c1f37f 769static void br_multicast_local_router_expired(struct timer_list *t)
eb1d1641 770{
88c1f37f 771 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
77041420
YG		 772
773 spin_lock(&br->multicast_lock);
774 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
775 br->multicast_router == MDB_RTR_TYPE_PERM ||
776 timer_pending(&br->multicast_router_timer))
777 goto out;
778
779 br_mc_router_state_change(br, false);
780out:
781 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 782}
783
cc0fdd80 784static void br_multicast_querier_expired(struct net_bridge *br,
90010b36 785 struct bridge_mcast_own_query *query)
c83b8fab 786{
c83b8fab 787 spin_lock(&br->multicast_lock);
13cefad2 788 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 789 goto out;
790
cc0fdd80 791 br_multicast_start_querier(br, query);
c83b8fab
HX		 792
793out:
794 spin_unlock(&br->multicast_lock);
795}
796
88c1f37f 797static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 798{
88c1f37f 799 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
cc0fdd80 800
90010b36 801 br_multicast_querier_expired(br, &br->ip4_own_query);
cc0fdd80
LL		 802}
803
804#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 805static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 806{
88c1f37f 807 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
cc0fdd80 808
90010b36 809 br_multicast_querier_expired(br, &br->ip6_own_query);
cc0fdd80
LL		 810}
811#endif
812
dc4eb53a
LL		 813static void br_multicast_select_own_querier(struct net_bridge *br,
814 struct br_ip *ip,
815 struct sk_buff *skb)
816{
817 if (ip->proto == htons(ETH_P_IP))
818 br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr;
819#if IS_ENABLED(CONFIG_IPV6)
820 else
821 br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr;
822#endif
823}
824
8ef2a9a5
YH		 825static void __br_multicast_send_query(struct net_bridge *br,
826 struct net_bridge_port *port,
827 struct br_ip *ip)
eb1d1641 828{
eb1d1641 829 struct sk_buff *skb;
1080ab95 830 u8 igmp_type;
eb1d1641 831
1080ab95 832 skb = br_multicast_alloc_query(br, ip, &igmp_type);
eb1d1641 833 if (!skb)
8ef2a9a5 834 return;
eb1d1641
HX		 835
836 if (port) {
eb1d1641 837 skb->dev = port->dev;
a65056ec 838 br_multicast_count(br, port, skb, igmp_type,
1080ab95 839 BR_MCAST_DIR_TX);
29a26a56
EB		 840 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
841 dev_net(port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 842 br_dev_queue_push_xmit);
dc4eb53a
LL		 843 } else {
844 br_multicast_select_own_querier(br, ip, skb);
a65056ec 845 br_multicast_count(br, port, skb, igmp_type,
1080ab95 846 BR_MCAST_DIR_RX);
eb1d1641 847 netif_rx(skb);
dc4eb53a 848 }
8ef2a9a5
YH		 849}
850
851static void br_multicast_send_query(struct net_bridge *br,
cc0fdd80 852 struct net_bridge_port *port,
90010b36 853 struct bridge_mcast_own_query *own_query)
8ef2a9a5 854{
90010b36 855 struct bridge_mcast_other_query *other_query = NULL;
5e923585
NA		 856 struct br_ip br_group;
857 unsigned long time;
8ef2a9a5 858
13cefad2
NA		 859 if (!netif_running(br->dev) ||
860 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
675779ad 861 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
8ef2a9a5
YH		 862 return;
863
08b202b6
YH		 864 memset(&br_group.u, 0, sizeof(br_group.u));
865
90010b36
LL		 866 if (port ? (own_query == &port->ip4_own_query) :
867 (own_query == &br->ip4_own_query)) {
868 other_query = &br->ip4_other_query;
cc0fdd80 869 br_group.proto = htons(ETH_P_IP);
dfd56b8b 870#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 871 } else {
90010b36 872 other_query = &br->ip6_other_query;
cc0fdd80 873 br_group.proto = htons(ETH_P_IPV6);
08b202b6 874#endif
cc0fdd80
LL		 875 }
876
90010b36 877 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 878 return;
879
880 __br_multicast_send_query(br, port, &br_group);
eb1d1641 881
eb1d1641 882 time = jiffies;
90010b36 883 time += own_query->startup_sent < br->multicast_startup_query_count ?
eb1d1641
HX		 884 br->multicast_startup_query_interval :
885 br->multicast_query_interval;
90010b36 886 mod_timer(&own_query->timer, time);
eb1d1641
HX		 887}
888
90010b36
LL		 889static void
890br_multicast_port_query_expired(struct net_bridge_port *port,
891 struct bridge_mcast_own_query *query)
eb1d1641 892{
eb1d1641
HX		 893 struct net_bridge *br = port->br;
894
895 spin_lock(&br->multicast_lock);
02a780c0
DC		 896 if (port->state == BR_STATE_DISABLED ||
897 port->state == BR_STATE_BLOCKING)
eb1d1641
HX		 898 goto out;
899
cc0fdd80
LL		 900 if (query->startup_sent < br->multicast_startup_query_count)
901 query->startup_sent++;
eb1d1641 902
cc0fdd80 903 br_multicast_send_query(port->br, port, query);
eb1d1641
HX		 904
905out:
906 spin_unlock(&br->multicast_lock);
907}
908
88c1f37f 909static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 910{
88c1f37f 911 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
cc0fdd80 912
90010b36 913 br_multicast_port_query_expired(port, &port->ip4_own_query);
cc0fdd80
LL		 914}
915
916#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 917static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 918{
88c1f37f 919 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
cc0fdd80 920
90010b36 921 br_multicast_port_query_expired(port, &port->ip6_own_query);
cc0fdd80
LL		 922}
923#endif
924
147c1e9b
NF		 925static void br_mc_disabled_update(struct net_device *dev, bool value)
926{
927 struct switchdev_attr attr = {
928 .orig_dev = dev,
929 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
930 .flags = SWITCHDEV_F_DEFER,
13cefad2 931 .u.mc_disabled = !value,
147c1e9b
NF		 932 };
933
934 switchdev_port_attr_set(dev, &attr);
935}
936
1080ab95 937int br_multicast_add_port(struct net_bridge_port *port)
eb1d1641 938{
7f0aec7a 939 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641 940
88c1f37f
AP		 941 timer_setup(&port->multicast_router_timer,
942 br_multicast_router_expired, 0);
943 timer_setup(&port->ip4_own_query.timer,
944 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 945#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 946 timer_setup(&port->ip6_own_query.timer,
947 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 948#endif
13cefad2
NA		 949 br_mc_disabled_update(port->dev,
950 br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
147c1e9b 951
1080ab95
NA		 952 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
953 if (!port->mcast_stats)
954 return -ENOMEM;
955
956 return 0;
eb1d1641
HX		 957}
958
959void br_multicast_del_port(struct net_bridge_port *port)
960{
e10177ab
SA		 961 struct net_bridge *br = port->br;
962 struct net_bridge_port_group *pg;
963 struct hlist_node *n;
964
965 /* Take care of the remaining groups, only perm ones should be left */
966 spin_lock_bh(&br->multicast_lock);
967 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
681590bd 968 br_multicast_find_del_pg(br, pg);
e10177ab 969 spin_unlock_bh(&br->multicast_lock);
eb1d1641 970 del_timer_sync(&port->multicast_router_timer);
1080ab95 971 free_percpu(port->mcast_stats);
eb1d1641
HX		 972}
973
90010b36 974static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 975{
cc0fdd80 976 query->startup_sent = 0;
561f1103 977
cc0fdd80
LL		 978 if (try_to_del_timer_sync(&query->timer) >= 0 ||
979 del_timer(&query->timer))
980 mod_timer(&query->timer, jiffies);
561f1103
HX		 981}
982
7cb3f921 983static void __br_multicast_enable_port(struct net_bridge_port *port)
eb1d1641
HX		 984{
985 struct net_bridge *br = port->br;
986
13cefad2 987 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
7cb3f921 988 return;
eb1d1641 989
90010b36 990 br_multicast_enable(&port->ip4_own_query);
cc0fdd80 991#if IS_ENABLED(CONFIG_IPV6)
90010b36 992 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 993#endif
7f0aec7a
NA		 994 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
995 hlist_unhashed(&port->rlist))
754bc547 996 br_multicast_add_router(br, port);
7cb3f921 997}
eb1d1641 998
7cb3f921
NA		 999void br_multicast_enable_port(struct net_bridge_port *port)
1000{
1001 struct net_bridge *br = port->br;
1002
1003 spin_lock(&br->multicast_lock);
1004 __br_multicast_enable_port(port);
eb1d1641
HX		 1005 spin_unlock(&br->multicast_lock);
1006}
1007
1008void br_multicast_disable_port(struct net_bridge_port *port)
1009{
1010 struct net_bridge *br = port->br;
1011 struct net_bridge_port_group *pg;
b67bfe0d 1012 struct hlist_node *n;
eb1d1641
HX		 1013
1014 spin_lock(&br->multicast_lock);
b67bfe0d 1015 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
9d06b6d8 1016 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
681590bd 1017 br_multicast_find_del_pg(br, pg);
eb1d1641 1018
f12e7d95
NF		 1019 __del_port_router(port);
1020
eb1d1641 1021 del_timer(&port->multicast_router_timer);
90010b36 1022 del_timer(&port->ip4_own_query.timer);
cc0fdd80 1023#if IS_ENABLED(CONFIG_IPV6)
90010b36 1024 del_timer(&port->ip6_own_query.timer);
cc0fdd80 1025#endif
eb1d1641
HX		 1026 spin_unlock(&br->multicast_lock);
1027}
1028
8ef2a9a5
YH		 1029static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
1030 struct net_bridge_port *port,
06499098
VY		 1031 struct sk_buff *skb,
1032 u16 vid)
eb1d1641 1033{
6db6f0ea 1034 const unsigned char *src;
eb1d1641
HX		 1035 struct igmpv3_report *ih;
1036 struct igmpv3_grec *grec;
1037 int i;
1038 int len;
1039 int num;
1040 int type;
1041 int err = 0;
1042 __be32 group;
e57f6185 1043 u16 nsrcs;
eb1d1641 1044
eb1d1641
HX		 1045 ih = igmpv3_report_hdr(skb);
1046 num = ntohs(ih->ngrec);
c2d4fbd2 1047 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 1048
1049 for (i = 0; i < num; i++) {
1050 len += sizeof(*grec);
ba5ea614 1051 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 1052 return -EINVAL;
1053
fd218cf9 1054 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 1055 group = grec->grec_mca;
1056 type = grec->grec_type;
e57f6185 1057 nsrcs = ntohs(grec->grec_nsrcs);
eb1d1641 1058
e57f6185 1059 len += nsrcs * 4;
ba5ea614 1060 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 1061 return -EINVAL;
1062
1063 /* We treat this as an IGMPv2 report for now. */
1064 switch (type) {
1065 case IGMPV3_MODE_IS_INCLUDE:
1066 case IGMPV3_MODE_IS_EXCLUDE:
1067 case IGMPV3_CHANGE_TO_INCLUDE:
1068 case IGMPV3_CHANGE_TO_EXCLUDE:
1069 case IGMPV3_ALLOW_NEW_SOURCES:
1070 case IGMPV3_BLOCK_OLD_SOURCES:
1071 break;
1072
1073 default:
1074 continue;
1075 }
1076
6db6f0ea 1077 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 1078 if ((type == IGMPV3_CHANGE_TO_INCLUDE ||
1079 type == IGMPV3_MODE_IS_INCLUDE) &&
e57f6185 1080 nsrcs == 0) {
6db6f0ea 1081 br_ip4_multicast_leave_group(br, port, group, vid, src);
bc8c20ac 1082 } else {
6db6f0ea 1083 err = br_ip4_multicast_add_group(br, port, group, vid,
8b671779 1084 src, true);
bc8c20ac
SA		 1085 if (err)
1086 break;
1087 }
eb1d1641
HX		 1088 }
1089
1090 return err;
1091}
1092
dfd56b8b 1093#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1094static int br_ip6_multicast_mld2_report(struct net_bridge *br,
1095 struct net_bridge_port *port,
06499098
VY		 1096 struct sk_buff *skb,
1097 u16 vid)
08b202b6 1098{
ba5ea614 1099 unsigned int nsrcs_offset;
6db6f0ea 1100 const unsigned char *src;
08b202b6
YH		 1101 struct icmp6hdr *icmp6h;
1102 struct mld2_grec *grec;
ba5ea614 1103 unsigned int grec_len;
08b202b6
YH		 1104 int i;
1105 int len;
1106 int num;
1107 int err = 0;
1108
ba5ea614 1109 if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
08b202b6
YH		 1110 return -EINVAL;
1111
1112 icmp6h = icmp6_hdr(skb);
1113 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
c2d4fbd2 1114 len = skb_transport_offset(skb) + sizeof(*icmp6h);
08b202b6
YH		 1115
1116 for (i = 0; i < num; i++) {
e57f6185
NA		 1117 __be16 *_nsrcs, __nsrcs;
1118 u16 nsrcs;
08b202b6 1119
ba5ea614
LL		 1120 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
1121
1122 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
5fc6266a 1123 nsrcs_offset + sizeof(__nsrcs))
ba5ea614
LL		 1124 return -EINVAL;
1125
e57f6185
NA		 1126 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
1127 sizeof(__nsrcs), &__nsrcs);
1128 if (!_nsrcs)
08b202b6
YH		 1129 return -EINVAL;
1130
e57f6185
NA		 1131 nsrcs = ntohs(*_nsrcs);
1132 grec_len = struct_size(grec, grec_src, nsrcs);
ba5ea614
LL		 1133
1134 if (!ipv6_mc_may_pull(skb, len + grec_len))
08b202b6
YH		 1135 return -EINVAL;
1136
1137 grec = (struct mld2_grec *)(skb->data + len);
ba5ea614 1138 len += grec_len;
08b202b6
YH		 1139
1140 /* We treat these as MLDv1 reports for now. */
1141 switch (grec->grec_type) {
1142 case MLD2_MODE_IS_INCLUDE:
1143 case MLD2_MODE_IS_EXCLUDE:
1144 case MLD2_CHANGE_TO_INCLUDE:
1145 case MLD2_CHANGE_TO_EXCLUDE:
1146 case MLD2_ALLOW_NEW_SOURCES:
1147 case MLD2_BLOCK_OLD_SOURCES:
1148 break;
1149
1150 default:
1151 continue;
1152 }
1153
6db6f0ea 1154 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 1155 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
1156 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
e57f6185 1157 nsrcs == 0) {
bc8c20ac 1158 br_ip6_multicast_leave_group(br, port, &grec->grec_mca,
6db6f0ea 1159 vid, src);
bc8c20ac
SA		 1160 } else {
1161 err = br_ip6_multicast_add_group(br, port,
6db6f0ea 1162 &grec->grec_mca, vid,
8b671779 1163 src, true);
9264251e 1164 if (err)
bc8c20ac
SA		 1165 break;
1166 }
08b202b6
YH		 1167 }
1168
1169 return err;
1170}
1171#endif
1172
dc4eb53a 1173static bool br_ip4_multicast_select_querier(struct net_bridge *br,
2cd41431 1174 struct net_bridge_port *port,
dc4eb53a
LL		 1175 __be32 saddr)
1176{
1177 if (!timer_pending(&br->ip4_own_query.timer) &&
1178 !timer_pending(&br->ip4_other_query.timer))
1179 goto update;
1180
1181 if (!br->ip4_querier.addr.u.ip4)
1182 goto update;
1183
1184 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4))
1185 goto update;
1186
1187 return false;
1188
1189update:
1190 br->ip4_querier.addr.u.ip4 = saddr;
1191
2cd41431
LL		 1192 /* update protected by general multicast_lock by caller */
1193 rcu_assign_pointer(br->ip4_querier.port, port);
1194
dc4eb53a
LL		 1195 return true;
1196}
1197
1198#if IS_ENABLED(CONFIG_IPV6)
1199static bool br_ip6_multicast_select_querier(struct net_bridge *br,
2cd41431 1200 struct net_bridge_port *port,
dc4eb53a
LL		 1201 struct in6_addr *saddr)
1202{
1203 if (!timer_pending(&br->ip6_own_query.timer) &&
1204 !timer_pending(&br->ip6_other_query.timer))
1205 goto update;
1206
1207 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0)
1208 goto update;
1209
1210 return false;
1211
1212update:
1213 br->ip6_querier.addr.u.ip6 = *saddr;
1214
2cd41431
LL		 1215 /* update protected by general multicast_lock by caller */
1216 rcu_assign_pointer(br->ip6_querier.port, port);
1217
dc4eb53a
LL		 1218 return true;
1219}
1220#endif
1221
1222static bool br_multicast_select_querier(struct net_bridge *br,
2cd41431 1223 struct net_bridge_port *port,
dc4eb53a
LL		 1224 struct br_ip *saddr)
1225{
1226 switch (saddr->proto) {
1227 case htons(ETH_P_IP):
2cd41431 1228 return br_ip4_multicast_select_querier(br, port, saddr->u.ip4);
dc4eb53a
LL		 1229#if IS_ENABLED(CONFIG_IPV6)
1230 case htons(ETH_P_IPV6):
2cd41431 1231 return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6);
dc4eb53a
LL		 1232#endif
1233 }
1234
1235 return false;
1236}
1237
cc0fdd80 1238static void
90010b36
LL		 1239br_multicast_update_query_timer(struct net_bridge *br,
1240 struct bridge_mcast_other_query *query,
1241 unsigned long max_delay)
b00589af 1242{
90010b36
LL		 1243 if (!timer_pending(&query->timer))
1244 query->delay_time = jiffies + max_delay;
b00589af 1245
90010b36 1246 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
b00589af
LL		 1247}
1248
6d549648
NF		 1249static void br_port_mc_router_state_change(struct net_bridge_port *p,
1250 bool is_mc_router)
1251{
1252 struct switchdev_attr attr = {
1253 .orig_dev = p->dev,
1254 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
1255 .flags = SWITCHDEV_F_DEFER,
1256 .u.mrouter = is_mc_router,
1257 };
1258
1259 switchdev_port_attr_set(p->dev, &attr);
1260}
1261
7e80c124 1262/*
7c77602f 1263 * Add port to router_list
7e80c124 1264 * list is maintained ordered by pointer value
1265 * and locked by br->multicast_lock and RCU
1266 */
0909e117
HX		 1267static void br_multicast_add_router(struct net_bridge *br,
1268 struct net_bridge_port *port)
1269{
dcdca2c4 1270 struct net_bridge_port *p;
b67bfe0d 1271 struct hlist_node *slot = NULL;
dcdca2c4 1272
1a040eac
NA		 1273 if (!hlist_unhashed(&port->rlist))
1274 return;
1275
b67bfe0d 1276 hlist_for_each_entry(p, &br->router_list, rlist) {
7e80c124 1277 if ((unsigned long) port >= (unsigned long) p)
1278 break;
b67bfe0d 1279 slot = &p->rlist;
dcdca2c4 1280 }
1281
7e80c124 1282 if (slot)
1d023284 1283 hlist_add_behind_rcu(&port->rlist, slot);
dcdca2c4 1284 else
1285 hlist_add_head_rcu(&port->rlist, &br->router_list);
949f1e39 1286 br_rtr_notify(br->dev, port, RTM_NEWMDB);
6d549648 1287 br_port_mc_router_state_change(port, true);
0909e117
HX		 1288}
1289
eb1d1641
HX		 1290static void br_multicast_mark_router(struct net_bridge *br,
1291 struct net_bridge_port *port)
1292{
1293 unsigned long now = jiffies;
eb1d1641
HX		 1294
1295 if (!port) {
77041420
YG		 1296 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
1297 if (!timer_pending(&br->multicast_router_timer))
1298 br_mc_router_state_change(br, true);
eb1d1641
HX		 1299 mod_timer(&br->multicast_router_timer,
1300 now + br->multicast_querier_interval);
77041420 1301 }
eb1d1641
HX		 1302 return;
1303 }
1304
a55d8246
NA		 1305 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1306 port->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 1307 return;
1308
0909e117 1309 br_multicast_add_router(br, port);
eb1d1641 1310
eb1d1641
HX		 1311 mod_timer(&port->multicast_router_timer,
1312 now + br->multicast_querier_interval);
1313}
1314
1315static void br_multicast_query_received(struct net_bridge *br,
1316 struct net_bridge_port *port,
90010b36 1317 struct bridge_mcast_other_query *query,
dc4eb53a 1318 struct br_ip *saddr,
b00589af 1319 unsigned long max_delay)
eb1d1641 1320{
2cd41431 1321 if (!br_multicast_select_querier(br, port, saddr))
eb1d1641
HX		 1322 return;
1323
dc4eb53a 1324 br_multicast_update_query_timer(br, query, max_delay);
278e2148 1325 br_multicast_mark_router(br, port);
eb1d1641
HX		 1326}
1327
9c2e955c 1328static void br_ip4_multicast_query(struct net_bridge *br,
1329 struct net_bridge_port *port,
1330 struct sk_buff *skb,
1331 u16 vid)
eb1d1641 1332{
ba5ea614 1333 unsigned int transport_len = ip_transport_len(skb);
b71d1d42 1334 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 1335 struct igmphdr *ih = igmp_hdr(skb);
1336 struct net_bridge_mdb_entry *mp;
1337 struct igmpv3_query *ih3;
1338 struct net_bridge_port_group *p;
e8051688 1339 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1340 struct br_ip saddr;
eb1d1641
HX		 1341 unsigned long max_delay;
1342 unsigned long now = jiffies;
1343 __be32 group;
1344
1345 spin_lock(&br->multicast_lock);
1346 if (!netif_running(br->dev) ||
1347 (port && port->state == BR_STATE_DISABLED))
1348 goto out;
1349
eb1d1641
HX		 1350 group = ih->group;
1351
ba5ea614 1352 if (transport_len == sizeof(*ih)) {
eb1d1641
HX		 1353 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
1354
1355 if (!max_delay) {
1356 max_delay = 10 * HZ;
1357 group = 0;
1358 }
ba5ea614 1359 } else if (transport_len >= sizeof(*ih3)) {
eb1d1641
HX		 1360 ih3 = igmpv3_query_hdr(skb);
1361 if (ih3->nsrcs)
bec68ff1 1362 goto out;
eb1d1641 1363
0ba8c9ec
YH		 1364 max_delay = ih3->code ?
1365 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 1366 } else {
9ed973cc
LL		 1367 goto out;
1368 }
1369
dc4eb53a
LL		 1370 if (!group) {
1371 saddr.proto = htons(ETH_P_IP);
1372 saddr.u.ip4 = iph->saddr;
b00589af 1373
dc4eb53a
LL		 1374 br_multicast_query_received(br, port, &br->ip4_other_query,
1375 &saddr, max_delay);
eb1d1641 1376 goto out;
dc4eb53a 1377 }
eb1d1641 1378
19e3a9c9 1379 mp = br_mdb_ip4_get(br, group, vid);
eb1d1641
HX		 1380 if (!mp)
1381 goto out;
1382
1383 max_delay *= br->multicast_last_member_count;
1384
ff0fd34e 1385 if (mp->host_joined &&
eb1d1641
HX		 1386 (timer_pending(&mp->timer) ?
1387 time_after(mp->timer.expires, now + max_delay) :
1388 try_to_del_timer_sync(&mp->timer) >= 0))
1389 mod_timer(&mp->timer, now + max_delay);
1390
e8051688
ED		 1391 for (pp = &mp->ports;
1392 (p = mlock_dereference(*pp, br)) != NULL;
1393 pp = &p->next) {
eb1d1641
HX		 1394 if (timer_pending(&p->timer) ?
1395 time_after(p->timer.expires, now + max_delay) :
1396 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1397 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 1398 }
1399
1400out:
1401 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 1402}
1403
dfd56b8b 1404#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1405static int br_ip6_multicast_query(struct net_bridge *br,
1406 struct net_bridge_port *port,
06499098
VY		 1407 struct sk_buff *skb,
1408 u16 vid)
08b202b6 1409{
ba5ea614 1410 unsigned int transport_len = ipv6_transport_len(skb);
eca2a43b 1411 struct mld_msg *mld;
08b202b6
YH		 1412 struct net_bridge_mdb_entry *mp;
1413 struct mld2_query *mld2q;
e8051688
ED		 1414 struct net_bridge_port_group *p;
1415 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1416 struct br_ip saddr;
08b202b6
YH		 1417 unsigned long max_delay;
1418 unsigned long now = jiffies;
856ce5d0 1419 unsigned int offset = skb_transport_offset(skb);
b71d1d42 1420 const struct in6_addr *group = NULL;
9ed973cc 1421 bool is_general_query;
08b202b6
YH		 1422 int err = 0;
1423
1424 spin_lock(&br->multicast_lock);
1425 if (!netif_running(br->dev) ||
1426 (port && port->state == BR_STATE_DISABLED))
1427 goto out;
1428
ba5ea614 1429 if (transport_len == sizeof(*mld)) {
856ce5d0 1430 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 1431 err = -EINVAL;
1432 goto out;
1433 }
1434 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 1435 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 1436 if (max_delay)
1437 group = &mld->mld_mca;
248ba8ec 1438 } else {
856ce5d0 1439 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 1440 err = -EINVAL;
1441 goto out;
1442 }
1443 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1444 if (!mld2q->mld2q_nsrcs)
1445 group = &mld2q->mld2q_mca;
e3f5b170
DB		 1446
1447 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 1448 }
1449
9ed973cc
LL		 1450 is_general_query = group && ipv6_addr_any(group);
1451
dc4eb53a
LL		 1452 if (is_general_query) {
1453 saddr.proto = htons(ETH_P_IPV6);
3b26a5d0 1454 saddr.u.ip6 = ipv6_hdr(skb)->saddr;
b00589af 1455
dc4eb53a
LL		 1456 br_multicast_query_received(br, port, &br->ip6_other_query,
1457 &saddr, max_delay);
08b202b6 1458 goto out;
6c03ee8b
LL		 1459 } else if (!group) {
1460 goto out;
dc4eb53a 1461 }
08b202b6 1462
19e3a9c9 1463 mp = br_mdb_ip6_get(br, group, vid);
08b202b6
YH		 1464 if (!mp)
1465 goto out;
1466
1467 max_delay *= br->multicast_last_member_count;
ff0fd34e 1468 if (mp->host_joined &&
08b202b6
YH		 1469 (timer_pending(&mp->timer) ?
1470 time_after(mp->timer.expires, now + max_delay) :
1471 try_to_del_timer_sync(&mp->timer) >= 0))
1472 mod_timer(&mp->timer, now + max_delay);
1473
e8051688
ED		 1474 for (pp = &mp->ports;
1475 (p = mlock_dereference(*pp, br)) != NULL;
1476 pp = &p->next) {
08b202b6
YH		 1477 if (timer_pending(&p->timer) ?
1478 time_after(p->timer.expires, now + max_delay) :
1479 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1480 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 1481 }
1482
1483out:
1484 spin_unlock(&br->multicast_lock);
1485 return err;
1486}
1487#endif
1488
90010b36
LL		 1489static void
1490br_multicast_leave_group(struct net_bridge *br,
1491 struct net_bridge_port *port,
1492 struct br_ip *group,
1493 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 1494 struct bridge_mcast_own_query *own_query,
1495 const unsigned char *src)
eb1d1641 1496{
eb1d1641
HX		 1497 struct net_bridge_mdb_entry *mp;
1498 struct net_bridge_port_group *p;
1499 unsigned long now;
1500 unsigned long time;
1501
eb1d1641
HX		 1502 spin_lock(&br->multicast_lock);
1503 if (!netif_running(br->dev) ||
544586f7 1504 (port && port->state == BR_STATE_DISABLED))
eb1d1641
HX		 1505 goto out;
1506
19e3a9c9 1507 mp = br_mdb_ip_get(br, group);
eb1d1641
HX		 1508 if (!mp)
1509 goto out;
1510
544586f7
SA		 1511 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
1512 struct net_bridge_port_group __rcu **pp;
1513
1514 for (pp = &mp->ports;
1515 (p = mlock_dereference(*pp, br)) != NULL;
1516 pp = &p->next) {
6db6f0ea 1517 if (!br_port_group_equal(p, port, src))
544586f7
SA		 1518 continue;
1519
5c725b6b
NA		 1520 if (p->flags & MDB_PG_FLAGS_PERMANENT)
1521 break;
1522
681590bd
NA		 1523 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
1524 br_multicast_del_pg(mp, p, pp);
544586f7
SA		 1525 }
1526 goto out;
1527 }
1528
1529 if (timer_pending(&other_query->timer))
1530 goto out;
1531
675779ad 1532 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
6b7df111
CW		 1533 __br_multicast_send_query(br, port, &mp->addr);
1534
1535 time = jiffies + br->multicast_last_member_count *
1536 br->multicast_last_member_interval;
cc0fdd80 1537
90010b36 1538 mod_timer(&own_query->timer, time);
6b7df111
CW		 1539
1540 for (p = mlock_dereference(mp->ports, br);
1541 p != NULL;
1542 p = mlock_dereference(p->next, br)) {
6db6f0ea 1543 if (!br_port_group_equal(p, port, src))
6b7df111
CW		 1544 continue;
1545
1546 if (!hlist_unhashed(&p->mglist) &&
1547 (timer_pending(&p->timer) ?
1548 time_after(p->timer.expires, time) :
1549 try_to_del_timer_sync(&p->timer) >= 0)) {
1550 mod_timer(&p->timer, time);
1551 }
1552
1553 break;
1554 }
1555 }
1556
eb1d1641
HX		 1557 now = jiffies;
1558 time = now + br->multicast_last_member_count *
1559 br->multicast_last_member_interval;
1560
1561 if (!port) {
ff0fd34e 1562 if (mp->host_joined &&
eb1d1641
HX		 1563 (timer_pending(&mp->timer) ?
1564 time_after(mp->timer.expires, time) :
1565 try_to_del_timer_sync(&mp->timer) >= 0)) {
1566 mod_timer(&mp->timer, time);
eb1d1641 1567 }
454594f3
LL		 1568
1569 goto out;
1570 }
1571
1572 for (p = mlock_dereference(mp->ports, br);
1573 p != NULL;
1574 p = mlock_dereference(p->next, br)) {
1575 if (p->port != port)
1576 continue;
1577
1578 if (!hlist_unhashed(&p->mglist) &&
1579 (timer_pending(&p->timer) ?
1580 time_after(p->timer.expires, time) :
1581 try_to_del_timer_sync(&p->timer) >= 0)) {
1582 mod_timer(&p->timer, time);
1583 }
1584
1585 break;
eb1d1641 1586 }
eb1d1641
HX		 1587out:
1588 spin_unlock(&br->multicast_lock);
1589}
1590
8ef2a9a5
YH		 1591static void br_ip4_multicast_leave_group(struct net_bridge *br,
1592 struct net_bridge_port *port,
b0e9a30d 1593 __be32 group,
6db6f0ea
FF		 1594 __u16 vid,
1595 const unsigned char *src)
8ef2a9a5
YH		 1596{
1597 struct br_ip br_group;
90010b36 1598 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 1599
1600 if (ipv4_is_local_multicast(group))
1601 return;
1602
90010b36
LL		 1603 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
1604
1515a63f 1605 memset(&br_group, 0, sizeof(br_group));
8ef2a9a5
YH		 1606 br_group.u.ip4 = group;
1607 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1608 br_group.vid = vid;
8ef2a9a5 1609
90010b36 1610 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
6db6f0ea 1611 own_query, src);
8ef2a9a5
YH		 1612}
1613
dfd56b8b 1614#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1615static void br_ip6_multicast_leave_group(struct net_bridge *br,
1616 struct net_bridge_port *port,
b0e9a30d 1617 const struct in6_addr *group,
6db6f0ea
FF		 1618 __u16 vid,
1619 const unsigned char *src)
08b202b6
YH		 1620{
1621 struct br_ip br_group;
90010b36 1622 struct bridge_mcast_own_query *own_query;
08b202b6 1623
3c3769e6 1624 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1625 return;
1626
90010b36
LL		 1627 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
1628
1515a63f 1629 memset(&br_group, 0, sizeof(br_group));
4e3fd7a0 1630 br_group.u.ip6 = *group;
08b202b6 1631 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1632 br_group.vid = vid;
08b202b6 1633
90010b36 1634 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
6db6f0ea 1635 own_query, src);
08b202b6
YH		 1636}
1637#endif
8ef2a9a5 1638
1080ab95
NA		 1639static void br_multicast_err_count(const struct net_bridge *br,
1640 const struct net_bridge_port *p,
1641 __be16 proto)
1642{
1643 struct bridge_mcast_stats __percpu *stats;
1644 struct bridge_mcast_stats *pstats;
1645
675779ad 1646 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 1647 return;
1648
1649 if (p)
1650 stats = p->mcast_stats;
1651 else
1652 stats = br->mcast_stats;
1653 if (WARN_ON(!stats))
1654 return;
1655
1656 pstats = this_cpu_ptr(stats);
1657
1658 u64_stats_update_begin(&pstats->syncp);
1659 switch (proto) {
1660 case htons(ETH_P_IP):
1661 pstats->mstats.igmp_parse_errors++;
1662 break;
1663#if IS_ENABLED(CONFIG_IPV6)
1664 case htons(ETH_P_IPV6):
1665 pstats->mstats.mld_parse_errors++;
1666 break;
1667#endif
1668 }
1669 u64_stats_update_end(&pstats->syncp);
1670}
1671
91b02d3d
NA		 1672static void br_multicast_pim(struct net_bridge *br,
1673 struct net_bridge_port *port,
1674 const struct sk_buff *skb)
1675{
1676 unsigned int offset = skb_transport_offset(skb);
1677 struct pimhdr *pimhdr, _pimhdr;
1678
1679 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
1680 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
1681 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
1682 return;
1683
1684 br_multicast_mark_router(br, port);
1685}
1686
4b3087c7
LL		 1687static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
1688 struct net_bridge_port *port,
1689 struct sk_buff *skb)
1690{
1691 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
1692 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
1693 return -ENOMSG;
1694
1695 br_multicast_mark_router(br, port);
1696
1697 return 0;
1698}
1699
eb1d1641
HX		 1700static int br_multicast_ipv4_rcv(struct net_bridge *br,
1701 struct net_bridge_port *port,
06499098
VY		 1702 struct sk_buff *skb,
1703 u16 vid)
eb1d1641 1704{
6db6f0ea 1705 const unsigned char *src;
eb1d1641 1706 struct igmphdr *ih;
eb1d1641
HX		 1707 int err;
1708
ba5ea614 1709 err = ip_mc_check_igmp(skb);
eb1d1641 1710
9afd85c9 1711 if (err == -ENOMSG) {
91b02d3d 1712 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 1713 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 1714 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
1715 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
1716 br_multicast_pim(br, port, skb);
4b3087c7 1717 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
08e71623 1718 br_ip4_multicast_mrd_rcv(br, port, skb);
91b02d3d 1719 }
4b3087c7 1720
eb1d1641 1721 return 0;
9afd85c9 1722 } else if (err < 0) {
1080ab95 1723 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 1724 return err;
bd4265fe 1725 }
eb1d1641 1726
9afd85c9 1727 ih = igmp_hdr(skb);
6db6f0ea 1728 src = eth_hdr(skb)->h_source;
1080ab95 1729 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
eb1d1641
HX		 1730
1731 switch (ih->type) {
1732 case IGMP_HOST_MEMBERSHIP_REPORT:
1733 case IGMPV2_HOST_MEMBERSHIP_REPORT:
62b2bcb4 1734 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
8b671779
NA		 1735 err = br_ip4_multicast_add_group(br, port, ih->group, vid, src,
1736 true);
eb1d1641
HX		 1737 break;
1738 case IGMPV3_HOST_MEMBERSHIP_REPORT:
ba5ea614 1739 err = br_ip4_multicast_igmp3_report(br, port, skb, vid);
eb1d1641
HX		 1740 break;
1741 case IGMP_HOST_MEMBERSHIP_QUERY:
ba5ea614 1742 br_ip4_multicast_query(br, port, skb, vid);
eb1d1641
HX		 1743 break;
1744 case IGMP_HOST_LEAVE_MESSAGE:
6db6f0ea 1745 br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
eb1d1641
HX		 1746 break;
1747 }
1748
a65056ec 1749 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1750 BR_MCAST_DIR_RX);
1751
eb1d1641
HX		 1752 return err;
1753}
1754
dfd56b8b 1755#if IS_ENABLED(CONFIG_IPV6)
4b3087c7
LL		 1756static int br_ip6_multicast_mrd_rcv(struct net_bridge *br,
1757 struct net_bridge_port *port,
1758 struct sk_buff *skb)
1759{
1760 int ret;
1761
1762 if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
1763 return -ENOMSG;
1764
1765 ret = ipv6_mc_check_icmpv6(skb);
1766 if (ret < 0)
1767 return ret;
1768
1769 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
1770 return -ENOMSG;
1771
1772 br_multicast_mark_router(br, port);
1773
1774 return 0;
1775}
1776
08b202b6
YH		 1777static int br_multicast_ipv6_rcv(struct net_bridge *br,
1778 struct net_bridge_port *port,
06499098
VY		 1779 struct sk_buff *skb,
1780 u16 vid)
08b202b6 1781{
6db6f0ea 1782 const unsigned char *src;
9afd85c9 1783 struct mld_msg *mld;
08b202b6
YH		 1784 int err;
1785
ba5ea614 1786 err = ipv6_mc_check_mld(skb);
08b202b6 1787
9afd85c9
LL		 1788 if (err == -ENOMSG) {
1789 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
1790 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
4b3087c7
LL		 1791
1792 if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) {
1793 err = br_ip6_multicast_mrd_rcv(br, port, skb);
1794
1795 if (err < 0 && err != -ENOMSG) {
1796 br_multicast_err_count(br, port, skb->protocol);
1797 return err;
1798 }
1799 }
1800
08b202b6 1801 return 0;
9afd85c9 1802 } else if (err < 0) {
1080ab95 1803 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 1804 return err;
08b202b6
YH		 1805 }
1806
9afd85c9 1807 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 1808 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 1809
9afd85c9 1810 switch (mld->mld_type) {
08b202b6 1811 case ICMPV6_MGM_REPORT:
6db6f0ea 1812 src = eth_hdr(skb)->h_source;
fc2af6c7 1813 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
6db6f0ea 1814 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
8b671779 1815 src, true);
08b202b6 1816 break;
08b202b6 1817 case ICMPV6_MLD2_REPORT:
ba5ea614 1818 err = br_ip6_multicast_mld2_report(br, port, skb, vid);
08b202b6
YH		 1819 break;
1820 case ICMPV6_MGM_QUERY:
ba5ea614 1821 err = br_ip6_multicast_query(br, port, skb, vid);
08b202b6
YH		 1822 break;
1823 case ICMPV6_MGM_REDUCTION:
6db6f0ea
FF		 1824 src = eth_hdr(skb)->h_source;
1825 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
9afd85c9 1826 break;
08b202b6
YH		 1827 }
1828
a65056ec 1829 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1830 BR_MCAST_DIR_RX);
1831
08b202b6
YH		 1832 return err;
1833}
1834#endif
1835
eb1d1641 1836int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
06499098 1837 struct sk_buff *skb, u16 vid)
eb1d1641 1838{
1080ab95
NA		 1839 int ret = 0;
1840
1fafc7a9
YH		 1841 BR_INPUT_SKB_CB(skb)->igmp = 0;
1842 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
1843
13cefad2 1844 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 1845 return 0;
1846
1847 switch (skb->protocol) {
1848 case htons(ETH_P_IP):
1080ab95
NA		 1849 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
1850 break;
dfd56b8b 1851#if IS_ENABLED(CONFIG_IPV6)
08b202b6 1852 case htons(ETH_P_IPV6):
1080ab95
NA		 1853 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
1854 break;
08b202b6 1855#endif
eb1d1641
HX		 1856 }
1857
1080ab95 1858 return ret;
eb1d1641
HX		 1859}
1860
cc0fdd80 1861static void br_multicast_query_expired(struct net_bridge *br,
2cd41431
LL		 1862 struct bridge_mcast_own_query *query,
1863 struct bridge_mcast_querier *querier)
cc0fdd80
LL		 1864{
1865 spin_lock(&br->multicast_lock);
1866 if (query->startup_sent < br->multicast_startup_query_count)
1867 query->startup_sent++;
1868
71d9f614 1869 RCU_INIT_POINTER(querier->port, NULL);
cc0fdd80
LL		 1870 br_multicast_send_query(br, NULL, query);
1871 spin_unlock(&br->multicast_lock);
1872}
1873
88c1f37f 1874static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 1875{
88c1f37f 1876 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
eb1d1641 1877
2cd41431 1878 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
cc0fdd80 1879}
eb1d1641 1880
cc0fdd80 1881#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1882static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 1883{
88c1f37f 1884 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
eb1d1641 1885
2cd41431 1886 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
eb1d1641 1887}
cc0fdd80 1888#endif
eb1d1641 1889
8b671779
NA		 1890static void __grp_src_gc(struct hlist_head *head)
1891{
1892 struct net_bridge_group_src *ent;
1893 struct hlist_node *tmp;
1894
1895 hlist_for_each_entry_safe(ent, tmp, head, del_node) {
1896 hlist_del_init(&ent->del_node);
1897 del_timer_sync(&ent->timer);
1898 kfree_rcu(ent, rcu);
1899 }
1900}
1901
1902static void br_multicast_src_gc(struct work_struct *work)
1903{
1904 struct net_bridge *br = container_of(work, struct net_bridge,
1905 src_gc_work);
1906 HLIST_HEAD(deleted_head);
1907
1908 spin_lock_bh(&br->multicast_lock);
1909 hlist_move_list(&br->src_gc_list, &deleted_head);
1910 spin_unlock_bh(&br->multicast_lock);
1911
1912 __grp_src_gc(&deleted_head);
1913}
1914
eb1d1641
HX		 1915void br_multicast_init(struct net_bridge *br)
1916{
d08c6bc0 1917 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
eb1d1641 1918
7f0aec7a 1919 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641
HX		 1920 br->multicast_last_member_count = 2;
1921 br->multicast_startup_query_count = 2;
1922
1923 br->multicast_last_member_interval = HZ;
1924 br->multicast_query_response_interval = 10 * HZ;
1925 br->multicast_startup_query_interval = 125 * HZ / 4;
1926 br->multicast_query_interval = 125 * HZ;
1927 br->multicast_querier_interval = 255 * HZ;
1928 br->multicast_membership_interval = 260 * HZ;
1929
90010b36 1930 br->ip4_other_query.delay_time = 0;
2cd41431 1931 br->ip4_querier.port = NULL;
aa2ae3e7 1932 br->multicast_igmp_version = 2;
cc0fdd80 1933#if IS_ENABLED(CONFIG_IPV6)
aa2ae3e7 1934 br->multicast_mld_version = 1;
90010b36 1935 br->ip6_other_query.delay_time = 0;
2cd41431 1936 br->ip6_querier.port = NULL;
cc0fdd80 1937#endif
6919622a 1938 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
675779ad 1939 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
b00589af 1940
eb1d1641 1941 spin_lock_init(&br->multicast_lock);
88c1f37f
AP		 1942 timer_setup(&br->multicast_router_timer,
1943 br_multicast_local_router_expired, 0);
1944 timer_setup(&br->ip4_other_query.timer,
1945 br_ip4_multicast_querier_expired, 0);
1946 timer_setup(&br->ip4_own_query.timer,
1947 br_ip4_multicast_query_expired, 0);
cc0fdd80 1948#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 1949 timer_setup(&br->ip6_other_query.timer,
1950 br_ip6_multicast_querier_expired, 0);
1951 timer_setup(&br->ip6_own_query.timer,
1952 br_ip6_multicast_query_expired, 0);
cc0fdd80 1953#endif
19e3a9c9 1954 INIT_HLIST_HEAD(&br->mdb_list);
8b671779
NA		 1955 INIT_HLIST_HEAD(&br->src_gc_list);
1956 INIT_WORK(&br->src_gc_work, br_multicast_src_gc);
eb1d1641
HX		 1957}
1958
4effd28c
LL		 1959static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
1960{
1961 struct in_device *in_dev = in_dev_get(br->dev);
1962
1963 if (!in_dev)
1964 return;
1965
9fb20801 1966 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 1967 in_dev_put(in_dev);
1968}
1969
1970#if IS_ENABLED(CONFIG_IPV6)
1971static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
1972{
1973 struct in6_addr addr;
1974
1975 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
1976 ipv6_dev_mc_inc(br->dev, &addr);
1977}
1978#else
1979static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
1980{
1981}
1982#endif
1983
1984static void br_multicast_join_snoopers(struct net_bridge *br)
1985{
1986 br_ip4_multicast_join_snoopers(br);
1987 br_ip6_multicast_join_snoopers(br);
1988}
1989
1990static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
1991{
1992 struct in_device *in_dev = in_dev_get(br->dev);
1993
1994 if (WARN_ON(!in_dev))
1995 return;
1996
9fb20801 1997 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 1998 in_dev_put(in_dev);
1999}
2000
2001#if IS_ENABLED(CONFIG_IPV6)
2002static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
2003{
2004 struct in6_addr addr;
2005
2006 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
2007 ipv6_dev_mc_dec(br->dev, &addr);
2008}
2009#else
2010static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
2011{
2012}
2013#endif
2014
2015static void br_multicast_leave_snoopers(struct net_bridge *br)
2016{
2017 br_ip4_multicast_leave_snoopers(br);
2018 br_ip6_multicast_leave_snoopers(br);
2019}
2020
cc0fdd80 2021static void __br_multicast_open(struct net_bridge *br,
90010b36 2022 struct bridge_mcast_own_query *query)
eb1d1641 2023{
cc0fdd80 2024 query->startup_sent = 0;
eb1d1641 2025
13cefad2 2026 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 2027 return;
2028
cc0fdd80
LL		 2029 mod_timer(&query->timer, jiffies);
2030}
2031
2032void br_multicast_open(struct net_bridge *br)
2033{
4effd28c
LL		 2034 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
2035 br_multicast_join_snoopers(br);
2036
90010b36 2037 __br_multicast_open(br, &br->ip4_own_query);
cc0fdd80 2038#if IS_ENABLED(CONFIG_IPV6)
90010b36 2039 __br_multicast_open(br, &br->ip6_own_query);
cc0fdd80 2040#endif
eb1d1641
HX		 2041}
2042
2043void br_multicast_stop(struct net_bridge *br)
2044{
eb1d1641 2045 del_timer_sync(&br->multicast_router_timer);
90010b36
LL		 2046 del_timer_sync(&br->ip4_other_query.timer);
2047 del_timer_sync(&br->ip4_own_query.timer);
cc0fdd80 2048#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 2049 del_timer_sync(&br->ip6_other_query.timer);
2050 del_timer_sync(&br->ip6_own_query.timer);
cc0fdd80 2051#endif
4effd28c
LL		 2052
2053 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
2054 br_multicast_leave_snoopers(br);
e10177ab
SA		 2055}
2056
2057void br_multicast_dev_del(struct net_bridge *br)
2058{
e10177ab 2059 struct net_bridge_mdb_entry *mp;
8b671779 2060 HLIST_HEAD(deleted_head);
19e3a9c9 2061 struct hlist_node *tmp;
eb1d1641
HX		 2062
2063 spin_lock_bh(&br->multicast_lock);
19e3a9c9
NA		 2064 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) {
2065 del_timer(&mp->timer);
2066 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
2067 br_mdb_rht_params);
2068 hlist_del_rcu(&mp->mdb_node);
4329596c 2069 kfree_rcu(mp, rcu);
eb1d1641 2070 }
8b671779 2071 hlist_move_list(&br->src_gc_list, &deleted_head);
eb1d1641 2072 spin_unlock_bh(&br->multicast_lock);
19e3a9c9 2073
8b671779
NA		 2074 __grp_src_gc(&deleted_head);
2075 cancel_work_sync(&br->src_gc_work);
2076
4329596c 2077 rcu_barrier();
eb1d1641 2078}
0909e117
HX		 2079
2080int br_multicast_set_router(struct net_bridge *br, unsigned long val)
2081{
6ae4ae8e 2082 int err = -EINVAL;
0909e117
HX		 2083
2084 spin_lock_bh(&br->multicast_lock);
0909e117
HX		 2085
2086 switch (val) {
7f0aec7a
NA		 2087 case MDB_RTR_TYPE_DISABLED:
2088 case MDB_RTR_TYPE_PERM:
77041420 2089 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
0909e117 2090 del_timer(&br->multicast_router_timer);
77041420
YG		 2091 br->multicast_router = val;
2092 err = 0;
2093 break;
7f0aec7a 2094 case MDB_RTR_TYPE_TEMP_QUERY:
77041420
YG		 2095 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
2096 br_mc_router_state_change(br, false);
0909e117
HX		 2097 br->multicast_router = val;
2098 err = 0;
2099 break;
0909e117
HX		 2100 }
2101
0909e117
HX		 2102 spin_unlock_bh(&br->multicast_lock);
2103
2104 return err;
2105}
2106
7f0aec7a
NA		 2107static void __del_port_router(struct net_bridge_port *p)
2108{
2109 if (hlist_unhashed(&p->rlist))
2110 return;
2111 hlist_del_init_rcu(&p->rlist);
2112 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
6d549648 2113 br_port_mc_router_state_change(p, false);
f12e7d95
NF		 2114
2115 /* don't allow timer refresh */
2116 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
2117 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 2118}
2119
0909e117
HX		 2120int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
2121{
2122 struct net_bridge *br = p->br;
a55d8246 2123 unsigned long now = jiffies;
6ae4ae8e 2124 int err = -EINVAL;
0909e117
HX		 2125
2126 spin_lock(&br->multicast_lock);
4950cfd1 2127 if (p->multicast_router == val) {
a55d8246
NA		 2128 /* Refresh the temp router port timer */
2129 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
2130 mod_timer(&p->multicast_router_timer,
2131 now + br->multicast_querier_interval);
4950cfd1
NA		 2132 err = 0;
2133 goto unlock;
2134 }
0909e117 2135 switch (val) {
7f0aec7a
NA		 2136 case MDB_RTR_TYPE_DISABLED:
2137 p->multicast_router = MDB_RTR_TYPE_DISABLED;
2138 __del_port_router(p);
2139 del_timer(&p->multicast_router_timer);
2140 break;
2141 case MDB_RTR_TYPE_TEMP_QUERY:
2142 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
2143 __del_port_router(p);
2144 break;
2145 case MDB_RTR_TYPE_PERM:
2146 p->multicast_router = MDB_RTR_TYPE_PERM;
0909e117 2147 del_timer(&p->multicast_router_timer);
0909e117
HX		 2148 br_multicast_add_router(br, p);
2149 break;
a55d8246
NA		 2150 case MDB_RTR_TYPE_TEMP:
2151 p->multicast_router = MDB_RTR_TYPE_TEMP;
2152 br_multicast_mark_router(br, p);
2153 break;
7f0aec7a
NA		 2154 default:
2155 goto unlock;
0909e117 2156 }
7f0aec7a
NA		 2157 err = 0;
2158unlock:
0909e117
HX		 2159 spin_unlock(&br->multicast_lock);
2160
2161 return err;
2162}
561f1103 2163
cc0fdd80 2164static void br_multicast_start_querier(struct net_bridge *br,
90010b36 2165 struct bridge_mcast_own_query *query)
561f1103
HX		 2166{
2167 struct net_bridge_port *port;
74857216 2168
cc0fdd80 2169 __br_multicast_open(br, query);
74857216 2170
c5b493ce
NA		 2171 rcu_read_lock();
2172 list_for_each_entry_rcu(port, &br->port_list, list) {
74857216
HX		 2173 if (port->state == BR_STATE_DISABLED ||
2174 port->state == BR_STATE_BLOCKING)
2175 continue;
2176
90010b36
LL		 2177 if (query == &br->ip4_own_query)
2178 br_multicast_enable(&port->ip4_own_query);
cc0fdd80
LL		 2179#if IS_ENABLED(CONFIG_IPV6)
2180 else
90010b36 2181 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 2182#endif
74857216 2183 }
c5b493ce 2184 rcu_read_unlock();
74857216
HX		 2185}
2186
2187int br_multicast_toggle(struct net_bridge *br, unsigned long val)
2188{
7cb3f921 2189 struct net_bridge_port *port;
561f1103 2190
ef5e0d82 2191 spin_lock_bh(&br->multicast_lock);
13cefad2 2192 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 2193 goto unlock;
2194
13cefad2
NA		 2195 br_mc_disabled_update(br->dev, val);
2196 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4effd28c
LL		 2197 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
2198 br_multicast_leave_snoopers(br);
561f1103 2199 goto unlock;
4effd28c 2200 }
561f1103 2201
3a7fda06
HX		 2202 if (!netif_running(br->dev))
2203 goto unlock;
2204
7cb3f921
NA		 2205 br_multicast_open(br);
2206 list_for_each_entry(port, &br->port_list, list)
2207 __br_multicast_enable_port(port);
561f1103
HX		 2208
2209unlock:
ef5e0d82 2210 spin_unlock_bh(&br->multicast_lock);
561f1103 2211
a26d94bf 2212 return 0;
561f1103 2213}
b195167f 2214
9341b988
IS		 2215bool br_multicast_enabled(const struct net_device *dev)
2216{
2217 struct net_bridge *br = netdev_priv(dev);
2218
13cefad2 2219 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 2220}
2221EXPORT_SYMBOL_GPL(br_multicast_enabled);
2222
0912bda4
YG		 2223bool br_multicast_router(const struct net_device *dev)
2224{
2225 struct net_bridge *br = netdev_priv(dev);
2226 bool is_router;
2227
2228 spin_lock_bh(&br->multicast_lock);
2229 is_router = br_multicast_is_router(br);
2230 spin_unlock_bh(&br->multicast_lock);
2231 return is_router;
2232}
2233EXPORT_SYMBOL_GPL(br_multicast_router);
2234
c5c23260
HX		 2235int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
2236{
b00589af
LL		 2237 unsigned long max_delay;
2238
c5c23260
HX		 2239 val = !!val;
2240
2241 spin_lock_bh(&br->multicast_lock);
675779ad 2242 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
c5c23260
HX		 2243 goto unlock;
2244
675779ad 2245 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
b00589af
LL		 2246 if (!val)
2247 goto unlock;
2248
2249 max_delay = br->multicast_query_response_interval;
b00589af 2250
90010b36
LL		 2251 if (!timer_pending(&br->ip4_other_query.timer))
2252 br->ip4_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2253
90010b36 2254 br_multicast_start_querier(br, &br->ip4_own_query);
cc0fdd80
LL		 2255
2256#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 2257 if (!timer_pending(&br->ip6_other_query.timer))
2258 br->ip6_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2259
90010b36 2260 br_multicast_start_querier(br, &br->ip6_own_query);
cc0fdd80 2261#endif
c5c23260
HX		 2262
2263unlock:
2264 spin_unlock_bh(&br->multicast_lock);
2265
2266 return 0;
2267}
2268
5e923585
NA		 2269int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
2270{
2271 /* Currently we support only version 2 and 3 */
2272 switch (val) {
2273 case 2:
2274 case 3:
2275 break;
2276 default:
2277 return -EINVAL;
2278 }
2279
2280 spin_lock_bh(&br->multicast_lock);
2281 br->multicast_igmp_version = val;
2282 spin_unlock_bh(&br->multicast_lock);
2283
2284 return 0;
2285}
2286
aa2ae3e7
NA		 2287#if IS_ENABLED(CONFIG_IPV6)
2288int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
2289{
2290 /* Currently we support version 1 and 2 */
2291 switch (val) {
2292 case 1:
2293 case 2:
2294 break;
2295 default:
2296 return -EINVAL;
2297 }
2298
2299 spin_lock_bh(&br->multicast_lock);
2300 br->multicast_mld_version = val;
2301 spin_unlock_bh(&br->multicast_lock);
2302
2303 return 0;
2304}
2305#endif
2306
07f8ac4a
LL		 2307/**
2308 * br_multicast_list_adjacent - Returns snooped multicast addresses
2309 * @dev: The bridge port adjacent to which to retrieve addresses
2310 * @br_ip_list: The list to store found, snooped multicast IP addresses in
2311 *
2312 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
2313 * snooping feature on all bridge ports of dev's bridge device, excluding
2314 * the addresses from dev itself.
2315 *
2316 * Returns the number of items added to br_ip_list.
2317 *
2318 * Notes:
2319 * - br_ip_list needs to be initialized by caller
2320 * - br_ip_list might contain duplicates in the end
2321 * (needs to be taken care of by caller)
2322 * - br_ip_list needs to be freed by caller
2323 */
2324int br_multicast_list_adjacent(struct net_device *dev,
2325 struct list_head *br_ip_list)
2326{
2327 struct net_bridge *br;
2328 struct net_bridge_port *port;
2329 struct net_bridge_port_group *group;
2330 struct br_ip_list *entry;
2331 int count = 0;
2332
2333 rcu_read_lock();
35f861e3 2334 if (!br_ip_list || !netif_is_bridge_port(dev))
07f8ac4a
LL		 2335 goto unlock;
2336
2337 port = br_port_get_rcu(dev);
2338 if (!port || !port->br)
2339 goto unlock;
2340
2341 br = port->br;
2342
2343 list_for_each_entry_rcu(port, &br->port_list, list) {
2344 if (!port->dev || port->dev == dev)
2345 continue;
2346
2347 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
2348 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
2349 if (!entry)
2350 goto unlock;
2351
2352 entry->addr = group->addr;
2353 list_add(&entry->list, br_ip_list);
2354 count++;
2355 }
2356 }
2357
2358unlock:
2359 rcu_read_unlock();
2360 return count;
2361}
2362EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2cd41431 2363
c34963e2
LL		 2364/**
2365 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
2366 * @dev: The bridge port providing the bridge on which to check for a querier
2367 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2368 *
2369 * Checks whether the given interface has a bridge on top and if so returns
2370 * true if a valid querier exists anywhere on the bridged link layer.
2371 * Otherwise returns false.
2372 */
2373bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
2374{
2375 struct net_bridge *br;
2376 struct net_bridge_port *port;
2377 struct ethhdr eth;
2378 bool ret = false;
2379
2380 rcu_read_lock();
35f861e3 2381 if (!netif_is_bridge_port(dev))
c34963e2
LL		 2382 goto unlock;
2383
2384 port = br_port_get_rcu(dev);
2385 if (!port || !port->br)
2386 goto unlock;
2387
2388 br = port->br;
2389
2390 memset(&eth, 0, sizeof(eth));
2391 eth.h_proto = htons(proto);
2392
2393 ret = br_multicast_querier_exists(br, &eth);
2394
2395unlock:
2396 rcu_read_unlock();
2397 return ret;
2398}
2399EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
2400
2cd41431
LL		 2401/**
2402 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
2403 * @dev: The bridge port adjacent to which to check for a querier
2404 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2405 *
2406 * Checks whether the given interface has a bridge on top and if so returns
2407 * true if a selected querier is behind one of the other ports of this
2408 * bridge. Otherwise returns false.
2409 */
2410bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
2411{
2412 struct net_bridge *br;
2413 struct net_bridge_port *port;
2414 bool ret = false;
2415
2416 rcu_read_lock();
35f861e3 2417 if (!netif_is_bridge_port(dev))
2cd41431
LL		 2418 goto unlock;
2419
2420 port = br_port_get_rcu(dev);
2421 if (!port || !port->br)
2422 goto unlock;
2423
2424 br = port->br;
2425
2426 switch (proto) {
2427 case ETH_P_IP:
2428 if (!timer_pending(&br->ip4_other_query.timer) ||
2429 rcu_dereference(br->ip4_querier.port) == port)
2430 goto unlock;
2431 break;
3993c4e1 2432#if IS_ENABLED(CONFIG_IPV6)
2cd41431
LL		 2433 case ETH_P_IPV6:
2434 if (!timer_pending(&br->ip6_other_query.timer) ||
2435 rcu_dereference(br->ip6_querier.port) == port)
2436 goto unlock;
2437 break;
3993c4e1 2438#endif
2cd41431
LL		 2439 default:
2440 goto unlock;
2441 }
2442
2443 ret = true;
2444unlock:
2445 rcu_read_unlock();
2446 return ret;
2447}
2448EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
1080ab95
NA		 2449
2450static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 2451 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2452{
2453 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 2454 __be16 proto = skb->protocol;
2455 unsigned int t_len;
1080ab95
NA		 2456
2457 u64_stats_update_begin(&pstats->syncp);
2458 switch (proto) {
2459 case htons(ETH_P_IP):
a65056ec 2460 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 2461 switch (type) {
2462 case IGMP_HOST_MEMBERSHIP_REPORT:
2463 pstats->mstats.igmp_v1reports[dir]++;
2464 break;
2465 case IGMPV2_HOST_MEMBERSHIP_REPORT:
2466 pstats->mstats.igmp_v2reports[dir]++;
2467 break;
2468 case IGMPV3_HOST_MEMBERSHIP_REPORT:
2469 pstats->mstats.igmp_v3reports[dir]++;
2470 break;
2471 case IGMP_HOST_MEMBERSHIP_QUERY:
a65056ec
NA		 2472 if (t_len != sizeof(struct igmphdr)) {
2473 pstats->mstats.igmp_v3queries[dir]++;
2474 } else {
2475 unsigned int offset = skb_transport_offset(skb);
2476 struct igmphdr *ih, _ihdr;
2477
2478 ih = skb_header_pointer(skb, offset,
2479 sizeof(_ihdr), &_ihdr);
2480 if (!ih)
2481 break;
2482 if (!ih->code)
2483 pstats->mstats.igmp_v1queries[dir]++;
2484 else
2485 pstats->mstats.igmp_v2queries[dir]++;
2486 }
1080ab95
NA		 2487 break;
2488 case IGMP_HOST_LEAVE_MESSAGE:
2489 pstats->mstats.igmp_leaves[dir]++;
2490 break;
2491 }
2492 break;
2493#if IS_ENABLED(CONFIG_IPV6)
2494 case htons(ETH_P_IPV6):
a65056ec
NA		 2495 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
2496 sizeof(struct ipv6hdr);
2497 t_len -= skb_network_header_len(skb);
1080ab95
NA		 2498 switch (type) {
2499 case ICMPV6_MGM_REPORT:
2500 pstats->mstats.mld_v1reports[dir]++;
2501 break;
2502 case ICMPV6_MLD2_REPORT:
2503 pstats->mstats.mld_v2reports[dir]++;
2504 break;
2505 case ICMPV6_MGM_QUERY:
a65056ec
NA		 2506 if (t_len != sizeof(struct mld_msg))
2507 pstats->mstats.mld_v2queries[dir]++;
2508 else
2509 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 2510 break;
2511 case ICMPV6_MGM_REDUCTION:
2512 pstats->mstats.mld_leaves[dir]++;
2513 break;
2514 }
2515 break;
2516#endif /* CONFIG_IPV6 */
2517 }
2518 u64_stats_update_end(&pstats->syncp);
2519}
2520
2521void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
a65056ec 2522 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2523{
2524 struct bridge_mcast_stats __percpu *stats;
2525
2526 /* if multicast_disabled is true then igmp type can't be set */
675779ad 2527 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 2528 return;
2529
2530 if (p)
2531 stats = p->mcast_stats;
2532 else
2533 stats = br->mcast_stats;
2534 if (WARN_ON(!stats))
2535 return;
2536
a65056ec 2537 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 2538}
2539
2540int br_multicast_init_stats(struct net_bridge *br)
2541{
2542 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2543 if (!br->mcast_stats)
2544 return -ENOMEM;
2545
2546 return 0;
2547}
2548
b6fe0440
IS		 2549void br_multicast_uninit_stats(struct net_bridge *br)
2550{
2551 free_percpu(br->mcast_stats);
2552}
2553
b3b6a84c
AB		 2554/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
2555static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
1080ab95
NA		 2556{
2557 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
2558 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
2559}
2560
2561void br_multicast_get_stats(const struct net_bridge *br,
2562 const struct net_bridge_port *p,
2563 struct br_mcast_stats *dest)
2564{
2565 struct bridge_mcast_stats __percpu *stats;
2566 struct br_mcast_stats tdst;
2567 int i;
2568
2569 memset(dest, 0, sizeof(*dest));
2570 if (p)
2571 stats = p->mcast_stats;
2572 else
2573 stats = br->mcast_stats;
2574 if (WARN_ON(!stats))
2575 return;
2576
2577 memset(&tdst, 0, sizeof(tdst));
2578 for_each_possible_cpu(i) {
2579 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
2580 struct br_mcast_stats temp;
2581 unsigned int start;
2582
2583 do {
2584 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
2585 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
2586 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
2587
a65056ec
NA		 2588 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
2589 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
2590 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
1080ab95
NA		 2591 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
2592 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
2593 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
2594 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
2595 tdst.igmp_parse_errors += temp.igmp_parse_errors;
2596
a65056ec
NA		 2597 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
2598 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 2599 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
2600 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
2601 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
2602 tdst.mld_parse_errors += temp.mld_parse_errors;
2603 }
2604 memcpy(dest, &tdst, sizeof(*dest));
2605}
19e3a9c9
NA		 2606
2607int br_mdb_hash_init(struct net_bridge *br)
2608{
2609 return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
2610}
2611
2612void br_mdb_hash_fini(struct net_bridge *br)
2613{
2614 rhashtable_destroy(&br->mdb_hash_tbl);
2615}
Linux 6.x block layer and io_uring tree(s)