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net/tls: Add support of AES128-CCM based ciphers
[linux-block.git] / net / bridge / br_multicast.c
CommitLineData
eb1d1641
HX		 1/*
2 * Bridge multicast support.
3 *
4 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
5 *
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)
9 * any later version.
10 *
11 */
12
13#include <linux/err.h>
07f8ac4a 14#include <linux/export.h>
eb1d1641
HX		 15#include <linux/if_ether.h>
16#include <linux/igmp.h>
4b3087c7 17#include <linux/in.h>
eb1d1641
HX		 18#include <linux/jhash.h>
19#include <linux/kernel.h>
b195167f 20#include <linux/log2.h>
eb1d1641
HX		 21#include <linux/netdevice.h>
22#include <linux/netfilter_bridge.h>
23#include <linux/random.h>
24#include <linux/rculist.h>
25#include <linux/skbuff.h>
26#include <linux/slab.h>
27#include <linux/timer.h>
1c8ad5bf 28#include <linux/inetdevice.h>
91b02d3d 29#include <linux/mroute.h>
eb1d1641 30#include <net/ip.h>
147c1e9b 31#include <net/switchdev.h>
dfd56b8b 32#if IS_ENABLED(CONFIG_IPV6)
4b3087c7 33#include <linux/icmpv6.h>
08b202b6
YH		 34#include <net/ipv6.h>
35#include <net/mld.h>
d4c4f07d 36#include <net/ip6_checksum.h>
3c3769e6 37#include <net/addrconf.h>
08b202b6 38#endif
eb1d1641
HX		 39
40#include "br_private.h"
41
19e3a9c9
NA		 42static const struct rhashtable_params br_mdb_rht_params = {
43 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
44 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
45 .key_len = sizeof(struct br_ip),
46 .automatic_shrinking = true,
47 .locks_mul = 1,
48};
49
cc0fdd80 50static void br_multicast_start_querier(struct net_bridge *br,
90010b36 51 struct bridge_mcast_own_query *query);
754bc547
SA		 52static void br_multicast_add_router(struct net_bridge *br,
53 struct net_bridge_port *port);
bc8c20ac
SA		 54static void br_ip4_multicast_leave_group(struct net_bridge *br,
55 struct net_bridge_port *port,
56 __be32 group,
6db6f0ea
FF		 57 __u16 vid,
58 const unsigned char *src);
59
f12e7d95 60static void __del_port_router(struct net_bridge_port *p);
bc8c20ac
SA		 61#if IS_ENABLED(CONFIG_IPV6)
62static void br_ip6_multicast_leave_group(struct net_bridge *br,
63 struct net_bridge_port *port,
64 const struct in6_addr *group,
6db6f0ea 65 __u16 vid, const unsigned char *src);
bc8c20ac 66#endif
c83b8fab 67
8ef2a9a5
YH		 68static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
69{
70 if (a->proto != b->proto)
71 return 0;
b0e9a30d
VY		 72 if (a->vid != b->vid)
73 return 0;
8ef2a9a5
YH		 74 switch (a->proto) {
75 case htons(ETH_P_IP):
76 return a->u.ip4 == b->u.ip4;
dfd56b8b 77#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 78 case htons(ETH_P_IPV6):
79 return ipv6_addr_equal(&a->u.ip6, &b->u.ip6);
80#endif
8ef2a9a5
YH		 81 }
82 return 0;
83}
84
19e3a9c9
NA		 85static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
86 struct br_ip *dst)
08b202b6 87{
19e3a9c9 88 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 89}
08b202b6 90
19e3a9c9
NA		 91struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
92 struct br_ip *dst)
eb1d1641 93{
19e3a9c9 94 struct net_bridge_mdb_entry *ent;
eb1d1641 95
19e3a9c9 96 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 97
19e3a9c9
NA		 98 rcu_read_lock();
99 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
100 rcu_read_unlock();
7f285fa7 101
19e3a9c9 102 return ent;
7f285fa7
HX		 103}
104
19e3a9c9
NA		 105static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
106 __be32 dst, __u16 vid)
eb1d1641 107{
8ef2a9a5
YH		 108 struct br_ip br_dst;
109
19e3a9c9 110 memset(&br_dst, 0, sizeof(br_dst));
8ef2a9a5
YH		 111 br_dst.u.ip4 = dst;
112 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 113 br_dst.vid = vid;
0821ec55 114
19e3a9c9 115 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 116}
117
dfd56b8b 118#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 119static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
120 const struct in6_addr *dst,
121 __u16 vid)
08b202b6
YH		 122{
123 struct br_ip br_dst;
0821ec55 124
19e3a9c9 125 memset(&br_dst, 0, sizeof(br_dst));
4e3fd7a0 126 br_dst.u.ip6 = *dst;
08b202b6 127 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 128 br_dst.vid = vid;
08b202b6 129
19e3a9c9 130 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 131}
132#endif
133
eb1d1641 134struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 135 struct sk_buff *skb, u16 vid)
eb1d1641 136{
8ef2a9a5
YH		 137 struct br_ip ip;
138
13cefad2 139 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 140 return NULL;
141
8ef2a9a5 142 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 143 return NULL;
144
19e3a9c9 145 memset(&ip, 0, sizeof(ip));
8ef2a9a5 146 ip.proto = skb->protocol;
fbca58a2 147 ip.vid = vid;
8ef2a9a5 148
eb1d1641
HX		 149 switch (skb->protocol) {
150 case htons(ETH_P_IP):
8ef2a9a5
YH		 151 ip.u.ip4 = ip_hdr(skb)->daddr;
152 break;
dfd56b8b 153#if IS_ENABLED(CONFIG_IPV6)
08b202b6 154 case htons(ETH_P_IPV6):
4e3fd7a0 155 ip.u.ip6 = ipv6_hdr(skb)->daddr;
08b202b6
YH		 156 break;
157#endif
8ef2a9a5
YH		 158 default:
159 return NULL;
eb1d1641
HX		 160 }
161
19e3a9c9 162 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 163}
164
88c1f37f 165static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 166{
88c1f37f 167 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 168 struct net_bridge *br = mp->br;
eb1d1641
HX		 169
170 spin_lock(&br->multicast_lock);
171 if (!netif_running(br->dev) || timer_pending(&mp->timer))
172 goto out;
173
ff0fd34e 174 mp->host_joined = false;
2a26028d 175 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0);
eb1d1641
HX		 176
177 if (mp->ports)
178 goto out;
179
19e3a9c9
NA		 180 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
181 br_mdb_rht_params);
182 hlist_del_rcu(&mp->mdb_node);
eb1d1641 183
4329596c 184 kfree_rcu(mp, rcu);
eb1d1641
HX		 185
186out:
187 spin_unlock(&br->multicast_lock);
188}
189
190static void br_multicast_del_pg(struct net_bridge *br,
191 struct net_bridge_port_group *pg)
192{
eb1d1641
HX		 193 struct net_bridge_mdb_entry *mp;
194 struct net_bridge_port_group *p;
e8051688
ED		 195 struct net_bridge_port_group __rcu **pp;
196
19e3a9c9 197 mp = br_mdb_ip_get(br, &pg->addr);
eb1d1641
HX		 198 if (WARN_ON(!mp))
199 return;
200
e8051688
ED		 201 for (pp = &mp->ports;
202 (p = mlock_dereference(*pp, br)) != NULL;
203 pp = &p->next) {
eb1d1641
HX		 204 if (p != pg)
205 continue;
206
83f6a740 207 rcu_assign_pointer(*pp, p->next);
eb1d1641
HX		 208 hlist_del_init(&p->mglist);
209 del_timer(&p->timer);
45ebcce5
ER		 210 br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB,
211 p->flags);
4329596c 212 kfree_rcu(p, rcu);
eb1d1641 213
ff0fd34e 214 if (!mp->ports && !mp->host_joined &&
eb1d1641
HX		 215 netif_running(br->dev))
216 mod_timer(&mp->timer, jiffies);
217
218 return;
219 }
220
221 WARN_ON(1);
222}
223
88c1f37f 224static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 225{
88c1f37f 226 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
eb1d1641
HX		 227 struct net_bridge *br = pg->port->br;
228
229 spin_lock(&br->multicast_lock);
230 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 231 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 232 goto out;
233
234 br_multicast_del_pg(br, pg);
235
236out:
237 spin_unlock(&br->multicast_lock);
238}
239
8ef2a9a5 240static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 241 __be32 group,
242 u8 *igmp_type)
eb1d1641 243{
5e923585
NA		 244 struct igmpv3_query *ihv3;
245 size_t igmp_hdr_size;
eb1d1641
HX		 246 struct sk_buff *skb;
247 struct igmphdr *ih;
248 struct ethhdr *eth;
249 struct iphdr *iph;
250
5e923585
NA		 251 igmp_hdr_size = sizeof(*ih);
252 if (br->multicast_igmp_version == 3)
253 igmp_hdr_size = sizeof(*ihv3);
eb1d1641 254 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
5e923585 255 igmp_hdr_size + 4);
eb1d1641
HX		 256 if (!skb)
257 goto out;
258
259 skb->protocol = htons(ETH_P_IP);
260
261 skb_reset_mac_header(skb);
262 eth = eth_hdr(skb);
263
e5a727f6 264 ether_addr_copy(eth->h_source, br->dev->dev_addr);
eb1d1641
HX		 265 eth->h_dest[0] = 1;
266 eth->h_dest[1] = 0;
267 eth->h_dest[2] = 0x5e;
268 eth->h_dest[3] = 0;
269 eth->h_dest[4] = 0;
270 eth->h_dest[5] = 1;
271 eth->h_proto = htons(ETH_P_IP);
272 skb_put(skb, sizeof(*eth));
273
274 skb_set_network_header(skb, skb->len);
275 iph = ip_hdr(skb);
276
277 iph->version = 4;
278 iph->ihl = 6;
279 iph->tos = 0xc0;
5e923585 280 iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4);
eb1d1641
HX		 281 iph->id = 0;
282 iph->frag_off = htons(IP_DF);
283 iph->ttl = 1;
284 iph->protocol = IPPROTO_IGMP;
675779ad 285 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
1c8ad5bf 286 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
eb1d1641
HX		 287 iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
288 ((u8 *)&iph[1])[0] = IPOPT_RA;
289 ((u8 *)&iph[1])[1] = 4;
290 ((u8 *)&iph[1])[2] = 0;
291 ((u8 *)&iph[1])[3] = 0;
292 ip_send_check(iph);
293 skb_put(skb, 24);
294
295 skb_set_transport_header(skb, skb->len);
1080ab95 296 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 297
5e923585
NA		 298 switch (br->multicast_igmp_version) {
299 case 2:
300 ih = igmp_hdr(skb);
301 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
302 ih->code = (group ? br->multicast_last_member_interval :
303 br->multicast_query_response_interval) /
304 (HZ / IGMP_TIMER_SCALE);
305 ih->group = group;
306 ih->csum = 0;
307 ih->csum = ip_compute_csum((void *)ih, sizeof(*ih));
308 break;
309 case 3:
310 ihv3 = igmpv3_query_hdr(skb);
311 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
312 ihv3->code = (group ? br->multicast_last_member_interval :
313 br->multicast_query_response_interval) /
314 (HZ / IGMP_TIMER_SCALE);
315 ihv3->group = group;
316 ihv3->qqic = br->multicast_query_interval / HZ;
317 ihv3->nsrcs = 0;
318 ihv3->resv = 0;
319 ihv3->suppress = 0;
320 ihv3->qrv = 2;
321 ihv3->csum = 0;
322 ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3));
323 break;
324 }
325
326 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 327 __skb_pull(skb, sizeof(*eth));
328
329out:
330 return skb;
331}
332
dfd56b8b 333#if IS_ENABLED(CONFIG_IPV6)
08b202b6 334static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 335 const struct in6_addr *grp,
336 u8 *igmp_type)
08b202b6 337{
aa2ae3e7
NA		 338 struct mld2_query *mld2q;
339 unsigned long interval;
08b202b6
YH		 340 struct ipv6hdr *ip6h;
341 struct mld_msg *mldq;
aa2ae3e7
NA		 342 size_t mld_hdr_size;
343 struct sk_buff *skb;
08b202b6
YH		 344 struct ethhdr *eth;
345 u8 *hopopt;
08b202b6 346
aa2ae3e7
NA		 347 mld_hdr_size = sizeof(*mldq);
348 if (br->multicast_mld_version == 2)
349 mld_hdr_size = sizeof(*mld2q);
08b202b6 350 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
aa2ae3e7 351 8 + mld_hdr_size);
08b202b6
YH		 352 if (!skb)
353 goto out;
354
355 skb->protocol = htons(ETH_P_IPV6);
356
357 /* Ethernet header */
358 skb_reset_mac_header(skb);
359 eth = eth_hdr(skb);
360
e5a727f6 361 ether_addr_copy(eth->h_source, br->dev->dev_addr);
08b202b6
YH		 362 eth->h_proto = htons(ETH_P_IPV6);
363 skb_put(skb, sizeof(*eth));
364
365 /* IPv6 header + HbH option */
366 skb_set_network_header(skb, skb->len);
367 ip6h = ipv6_hdr(skb);
368
369 *(__force __be32 *)ip6h = htonl(0x60000000);
aa2ae3e7 370 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 371 ip6h->nexthdr = IPPROTO_HOPOPTS;
372 ip6h->hop_limit = 1;
a7bff75b 373 ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
d1d81d4c
UW		 374 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
375 &ip6h->saddr)) {
376 kfree_skb(skb);
675779ad 377 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 378 return NULL;
379 }
0888d5f3 380
675779ad 381 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 382 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 383
384 hopopt = (u8 *)(ip6h + 1);
385 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
386 hopopt[1] = 0; /* length of HbH */
387 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
388 hopopt[3] = 2; /* Length of RA Option */
389 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
390 hopopt[5] = 0;
1de5a71c
EZ		 391 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
392 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 393
394 skb_put(skb, sizeof(*ip6h) + 8);
395
396 /* ICMPv6 */
397 skb_set_transport_header(skb, skb->len);
1080ab95 398 interval = ipv6_addr_any(grp) ?
32de868c
LL		 399 br->multicast_query_response_interval :
400 br->multicast_last_member_interval;
1080ab95 401 *igmp_type = ICMPV6_MGM_QUERY;
aa2ae3e7
NA		 402 switch (br->multicast_mld_version) {
403 case 1:
404 mldq = (struct mld_msg *)icmp6_hdr(skb);
405 mldq->mld_type = ICMPV6_MGM_QUERY;
406 mldq->mld_code = 0;
407 mldq->mld_cksum = 0;
408 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
409 mldq->mld_reserved = 0;
410 mldq->mld_mca = *grp;
411 mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
412 sizeof(*mldq), IPPROTO_ICMPV6,
413 csum_partial(mldq,
414 sizeof(*mldq),
415 0));
416 break;
417 case 2:
418 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 419 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 420 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
421 mld2q->mld2q_code = 0;
422 mld2q->mld2q_cksum = 0;
423 mld2q->mld2q_resv1 = 0;
424 mld2q->mld2q_resv2 = 0;
425 mld2q->mld2q_suppress = 0;
426 mld2q->mld2q_qrv = 2;
427 mld2q->mld2q_nsrcs = 0;
428 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
429 mld2q->mld2q_mca = *grp;
430 mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
431 sizeof(*mld2q),
432 IPPROTO_ICMPV6,
433 csum_partial(mld2q,
434 sizeof(*mld2q),
435 0));
436 break;
437 }
438 skb_put(skb, mld_hdr_size);
08b202b6
YH		 439
440 __skb_pull(skb, sizeof(*eth));
441
442out:
443 return skb;
444}
445#endif
446
8ef2a9a5 447static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 448 struct br_ip *addr,
449 u8 *igmp_type)
8ef2a9a5
YH		 450{
451 switch (addr->proto) {
452 case htons(ETH_P_IP):
1080ab95 453 return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type);
dfd56b8b 454#if IS_ENABLED(CONFIG_IPV6)
08b202b6 455 case htons(ETH_P_IPV6):
1080ab95
NA		 456 return br_ip6_multicast_alloc_query(br, &addr->u.ip6,
457 igmp_type);
08b202b6 458#endif
8ef2a9a5
YH		 459 }
460 return NULL;
461}
462
cfd56754 463struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 464 struct br_ip *group)
eb1d1641 465{
eb1d1641 466 struct net_bridge_mdb_entry *mp;
4c0833bc 467 int err;
eb1d1641 468
19e3a9c9
NA		 469 mp = br_mdb_ip_get(br, group);
470 if (mp)
471 return mp;
eb1d1641 472
19e3a9c9
NA		 473 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
474 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
475 return ERR_PTR(-E2BIG);
eb1d1641
HX		 476 }
477
478 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
479 if (unlikely(!mp))
4c0833bc 480 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 481
482 mp->br = br;
8ef2a9a5 483 mp->addr = *group;
88c1f37f 484 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 485 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
486 br_mdb_rht_params);
487 if (err) {
488 kfree(mp);
489 mp = ERR_PTR(err);
490 } else {
491 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
492 }
1faabf2a 493
eb1d1641
HX		 494 return mp;
495}
496
cfd56754
CW		 497struct net_bridge_port_group *br_multicast_new_port_group(
498 struct net_bridge_port *port,
499 struct br_ip *group,
ccb1c31a 500 struct net_bridge_port_group __rcu *next,
6db6f0ea
FF		 501 unsigned char flags,
502 const unsigned char *src)
cfd56754
CW		 503{
504 struct net_bridge_port_group *p;
505
506 p = kzalloc(sizeof(*p), GFP_ATOMIC);
507 if (unlikely(!p))
508 return NULL;
509
510 p->addr = *group;
511 p->port = port;
9d06b6d8 512 p->flags = flags;
eca2a43b 513 rcu_assign_pointer(p->next, next);
cfd56754 514 hlist_add_head(&p->mglist, &port->mglist);
88c1f37f 515 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
6db6f0ea
FF		 516
517 if (src)
518 memcpy(p->eth_addr, src, ETH_ALEN);
519 else
520 memset(p->eth_addr, 0xff, ETH_ALEN);
521
cfd56754
CW		 522 return p;
523}
524
6db6f0ea
FF		 525static bool br_port_group_equal(struct net_bridge_port_group *p,
526 struct net_bridge_port *port,
527 const unsigned char *src)
528{
529 if (p->port != port)
530 return false;
531
532 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
533 return true;
534
535 return ether_addr_equal(src, p->eth_addr);
536}
537
eb1d1641 538static int br_multicast_add_group(struct net_bridge *br,
8ef2a9a5 539 struct net_bridge_port *port,
6db6f0ea
FF		 540 struct br_ip *group,
541 const unsigned char *src)
eb1d1641 542{
e8051688 543 struct net_bridge_port_group __rcu **pp;
5e923585
NA		 544 struct net_bridge_port_group *p;
545 struct net_bridge_mdb_entry *mp;
454594f3 546 unsigned long now = jiffies;
eb1d1641
HX		 547 int err;
548
eb1d1641
HX		 549 spin_lock(&br->multicast_lock);
550 if (!netif_running(br->dev) ||
551 (port && port->state == BR_STATE_DISABLED))
552 goto out;
553
19e3a9c9 554 mp = br_multicast_new_group(br, group);
eb1d1641 555 err = PTR_ERR(mp);
4c0833bc 556 if (IS_ERR(mp))
eb1d1641
HX		 557 goto err;
558
559 if (!port) {
2a26028d
AL		 560 if (!mp->host_joined) {
561 mp->host_joined = true;
562 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0);
563 }
454594f3 564 mod_timer(&mp->timer, now + br->multicast_membership_interval);
eb1d1641
HX		 565 goto out;
566 }
567
e8051688
ED		 568 for (pp = &mp->ports;
569 (p = mlock_dereference(*pp, br)) != NULL;
570 pp = &p->next) {
6db6f0ea 571 if (br_port_group_equal(p, port, src))
454594f3 572 goto found;
eb1d1641
HX		 573 if ((unsigned long)p->port < (unsigned long)port)
574 break;
575 }
576
6db6f0ea 577 p = br_multicast_new_port_group(port, group, *pp, 0, src);
eb1d1641
HX		 578 if (unlikely(!p))
579 goto err;
eb1d1641 580 rcu_assign_pointer(*pp, p);
45ebcce5 581 br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0);
eb1d1641 582
454594f3
LL		 583found:
584 mod_timer(&p->timer, now + br->multicast_membership_interval);
eb1d1641
HX		 585out:
586 err = 0;
587
588err:
589 spin_unlock(&br->multicast_lock);
590 return err;
591}
592
8ef2a9a5
YH		 593static int br_ip4_multicast_add_group(struct net_bridge *br,
594 struct net_bridge_port *port,
b0e9a30d 595 __be32 group,
6db6f0ea
FF		 596 __u16 vid,
597 const unsigned char *src)
8ef2a9a5
YH		 598{
599 struct br_ip br_group;
600
601 if (ipv4_is_local_multicast(group))
602 return 0;
603
604 br_group.u.ip4 = group;
605 br_group.proto = htons(ETH_P_IP);
b0e9a30d 606 br_group.vid = vid;
8ef2a9a5 607
6db6f0ea 608 return br_multicast_add_group(br, port, &br_group, src);
8ef2a9a5
YH		 609}
610
dfd56b8b 611#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 612static int br_ip6_multicast_add_group(struct net_bridge *br,
613 struct net_bridge_port *port,
b0e9a30d 614 const struct in6_addr *group,
6db6f0ea
FF		 615 __u16 vid,
616 const unsigned char *src)
08b202b6
YH		 617{
618 struct br_ip br_group;
619
3c3769e6 620 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 621 return 0;
622
19e3a9c9 623 memset(&br_group, 0, sizeof(br_group));
4e3fd7a0 624 br_group.u.ip6 = *group;
9cc6e0c4 625 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 626 br_group.vid = vid;
08b202b6 627
6db6f0ea 628 return br_multicast_add_group(br, port, &br_group, src);
08b202b6
YH		 629}
630#endif
631
88c1f37f 632static void br_multicast_router_expired(struct timer_list *t)
eb1d1641 633{
88c1f37f
AP		 634 struct net_bridge_port *port =
635 from_timer(port, t, multicast_router_timer);
eb1d1641
HX		 636 struct net_bridge *br = port->br;
637
638 spin_lock(&br->multicast_lock);
a55d8246
NA		 639 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
640 port->multicast_router == MDB_RTR_TYPE_PERM ||
f12e7d95 641 timer_pending(&port->multicast_router_timer))
eb1d1641
HX		 642 goto out;
643
f12e7d95 644 __del_port_router(port);
eb1d1641
HX		 645out:
646 spin_unlock(&br->multicast_lock);
647}
648
77041420
YG		 649static void br_mc_router_state_change(struct net_bridge *p,
650 bool is_mc_router)
651{
652 struct switchdev_attr attr = {
653 .orig_dev = p->dev,
654 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
655 .flags = SWITCHDEV_F_DEFER,
656 .u.mrouter = is_mc_router,
657 };
658
659 switchdev_port_attr_set(p->dev, &attr);
660}
661
88c1f37f 662static void br_multicast_local_router_expired(struct timer_list *t)
eb1d1641 663{
88c1f37f 664 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
77041420
YG		 665
666 spin_lock(&br->multicast_lock);
667 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
668 br->multicast_router == MDB_RTR_TYPE_PERM ||
669 timer_pending(&br->multicast_router_timer))
670 goto out;
671
672 br_mc_router_state_change(br, false);
673out:
674 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 675}
676
cc0fdd80 677static void br_multicast_querier_expired(struct net_bridge *br,
90010b36 678 struct bridge_mcast_own_query *query)
c83b8fab 679{
c83b8fab 680 spin_lock(&br->multicast_lock);
13cefad2 681 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 682 goto out;
683
cc0fdd80 684 br_multicast_start_querier(br, query);
c83b8fab
HX		 685
686out:
687 spin_unlock(&br->multicast_lock);
688}
689
88c1f37f 690static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 691{
88c1f37f 692 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
cc0fdd80 693
90010b36 694 br_multicast_querier_expired(br, &br->ip4_own_query);
cc0fdd80
LL		 695}
696
697#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 698static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 699{
88c1f37f 700 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
cc0fdd80 701
90010b36 702 br_multicast_querier_expired(br, &br->ip6_own_query);
cc0fdd80
LL		 703}
704#endif
705
dc4eb53a
LL		 706static void br_multicast_select_own_querier(struct net_bridge *br,
707 struct br_ip *ip,
708 struct sk_buff *skb)
709{
710 if (ip->proto == htons(ETH_P_IP))
711 br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr;
712#if IS_ENABLED(CONFIG_IPV6)
713 else
714 br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr;
715#endif
716}
717
8ef2a9a5
YH		 718static void __br_multicast_send_query(struct net_bridge *br,
719 struct net_bridge_port *port,
720 struct br_ip *ip)
eb1d1641 721{
eb1d1641 722 struct sk_buff *skb;
1080ab95 723 u8 igmp_type;
eb1d1641 724
1080ab95 725 skb = br_multicast_alloc_query(br, ip, &igmp_type);
eb1d1641 726 if (!skb)
8ef2a9a5 727 return;
eb1d1641
HX		 728
729 if (port) {
eb1d1641 730 skb->dev = port->dev;
a65056ec 731 br_multicast_count(br, port, skb, igmp_type,
1080ab95 732 BR_MCAST_DIR_TX);
29a26a56
EB		 733 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
734 dev_net(port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 735 br_dev_queue_push_xmit);
dc4eb53a
LL		 736 } else {
737 br_multicast_select_own_querier(br, ip, skb);
a65056ec 738 br_multicast_count(br, port, skb, igmp_type,
1080ab95 739 BR_MCAST_DIR_RX);
eb1d1641 740 netif_rx(skb);
dc4eb53a 741 }
8ef2a9a5
YH		 742}
743
744static void br_multicast_send_query(struct net_bridge *br,
cc0fdd80 745 struct net_bridge_port *port,
90010b36 746 struct bridge_mcast_own_query *own_query)
8ef2a9a5 747{
90010b36 748 struct bridge_mcast_other_query *other_query = NULL;
5e923585
NA		 749 struct br_ip br_group;
750 unsigned long time;
8ef2a9a5 751
13cefad2
NA		 752 if (!netif_running(br->dev) ||
753 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
675779ad 754 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
8ef2a9a5
YH		 755 return;
756
08b202b6
YH		 757 memset(&br_group.u, 0, sizeof(br_group.u));
758
90010b36
LL		 759 if (port ? (own_query == &port->ip4_own_query) :
760 (own_query == &br->ip4_own_query)) {
761 other_query = &br->ip4_other_query;
cc0fdd80 762 br_group.proto = htons(ETH_P_IP);
dfd56b8b 763#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 764 } else {
90010b36 765 other_query = &br->ip6_other_query;
cc0fdd80 766 br_group.proto = htons(ETH_P_IPV6);
08b202b6 767#endif
cc0fdd80
LL		 768 }
769
90010b36 770 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 771 return;
772
773 __br_multicast_send_query(br, port, &br_group);
eb1d1641 774
eb1d1641 775 time = jiffies;
90010b36 776 time += own_query->startup_sent < br->multicast_startup_query_count ?
eb1d1641
HX		 777 br->multicast_startup_query_interval :
778 br->multicast_query_interval;
90010b36 779 mod_timer(&own_query->timer, time);
eb1d1641
HX		 780}
781
90010b36
LL		 782static void
783br_multicast_port_query_expired(struct net_bridge_port *port,
784 struct bridge_mcast_own_query *query)
eb1d1641 785{
eb1d1641
HX		 786 struct net_bridge *br = port->br;
787
788 spin_lock(&br->multicast_lock);
02a780c0
DC		 789 if (port->state == BR_STATE_DISABLED ||
790 port->state == BR_STATE_BLOCKING)
eb1d1641
HX		 791 goto out;
792
cc0fdd80
LL		 793 if (query->startup_sent < br->multicast_startup_query_count)
794 query->startup_sent++;
eb1d1641 795
cc0fdd80 796 br_multicast_send_query(port->br, port, query);
eb1d1641
HX		 797
798out:
799 spin_unlock(&br->multicast_lock);
800}
801
88c1f37f 802static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 803{
88c1f37f 804 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
cc0fdd80 805
90010b36 806 br_multicast_port_query_expired(port, &port->ip4_own_query);
cc0fdd80
LL		 807}
808
809#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 810static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 811{
88c1f37f 812 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
cc0fdd80 813
90010b36 814 br_multicast_port_query_expired(port, &port->ip6_own_query);
cc0fdd80
LL		 815}
816#endif
817
147c1e9b
NF		 818static void br_mc_disabled_update(struct net_device *dev, bool value)
819{
820 struct switchdev_attr attr = {
821 .orig_dev = dev,
822 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
823 .flags = SWITCHDEV_F_DEFER,
13cefad2 824 .u.mc_disabled = !value,
147c1e9b
NF		 825 };
826
827 switchdev_port_attr_set(dev, &attr);
828}
829
1080ab95 830int br_multicast_add_port(struct net_bridge_port *port)
eb1d1641 831{
7f0aec7a 832 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641 833
88c1f37f
AP		 834 timer_setup(&port->multicast_router_timer,
835 br_multicast_router_expired, 0);
836 timer_setup(&port->ip4_own_query.timer,
837 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 838#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 839 timer_setup(&port->ip6_own_query.timer,
840 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 841#endif
13cefad2
NA		 842 br_mc_disabled_update(port->dev,
843 br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
147c1e9b 844
1080ab95
NA		 845 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
846 if (!port->mcast_stats)
847 return -ENOMEM;
848
849 return 0;
eb1d1641
HX		 850}
851
852void br_multicast_del_port(struct net_bridge_port *port)
853{
e10177ab
SA		 854 struct net_bridge *br = port->br;
855 struct net_bridge_port_group *pg;
856 struct hlist_node *n;
857
858 /* Take care of the remaining groups, only perm ones should be left */
859 spin_lock_bh(&br->multicast_lock);
860 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
861 br_multicast_del_pg(br, pg);
862 spin_unlock_bh(&br->multicast_lock);
eb1d1641 863 del_timer_sync(&port->multicast_router_timer);
1080ab95 864 free_percpu(port->mcast_stats);
eb1d1641
HX		 865}
866
90010b36 867static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 868{
cc0fdd80 869 query->startup_sent = 0;
561f1103 870
cc0fdd80
LL		 871 if (try_to_del_timer_sync(&query->timer) >= 0 ||
872 del_timer(&query->timer))
873 mod_timer(&query->timer, jiffies);
561f1103
HX		 874}
875
7cb3f921 876static void __br_multicast_enable_port(struct net_bridge_port *port)
eb1d1641
HX		 877{
878 struct net_bridge *br = port->br;
879
13cefad2 880 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
7cb3f921 881 return;
eb1d1641 882
90010b36 883 br_multicast_enable(&port->ip4_own_query);
cc0fdd80 884#if IS_ENABLED(CONFIG_IPV6)
90010b36 885 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 886#endif
7f0aec7a
NA		 887 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
888 hlist_unhashed(&port->rlist))
754bc547 889 br_multicast_add_router(br, port);
7cb3f921 890}
eb1d1641 891
7cb3f921
NA		 892void br_multicast_enable_port(struct net_bridge_port *port)
893{
894 struct net_bridge *br = port->br;
895
896 spin_lock(&br->multicast_lock);
897 __br_multicast_enable_port(port);
eb1d1641
HX		 898 spin_unlock(&br->multicast_lock);
899}
900
901void br_multicast_disable_port(struct net_bridge_port *port)
902{
903 struct net_bridge *br = port->br;
904 struct net_bridge_port_group *pg;
b67bfe0d 905 struct hlist_node *n;
eb1d1641
HX		 906
907 spin_lock(&br->multicast_lock);
b67bfe0d 908 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
9d06b6d8 909 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
e10177ab 910 br_multicast_del_pg(br, pg);
eb1d1641 911
f12e7d95
NF		 912 __del_port_router(port);
913
eb1d1641 914 del_timer(&port->multicast_router_timer);
90010b36 915 del_timer(&port->ip4_own_query.timer);
cc0fdd80 916#if IS_ENABLED(CONFIG_IPV6)
90010b36 917 del_timer(&port->ip6_own_query.timer);
cc0fdd80 918#endif
eb1d1641
HX		 919 spin_unlock(&br->multicast_lock);
920}
921
8ef2a9a5
YH		 922static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
923 struct net_bridge_port *port,
06499098
VY		 924 struct sk_buff *skb,
925 u16 vid)
eb1d1641 926{
6db6f0ea 927 const unsigned char *src;
eb1d1641
HX		 928 struct igmpv3_report *ih;
929 struct igmpv3_grec *grec;
930 int i;
931 int len;
932 int num;
933 int type;
934 int err = 0;
935 __be32 group;
936
eb1d1641
HX		 937 ih = igmpv3_report_hdr(skb);
938 num = ntohs(ih->ngrec);
c2d4fbd2 939 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 940
941 for (i = 0; i < num; i++) {
942 len += sizeof(*grec);
ba5ea614 943 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 944 return -EINVAL;
945
fd218cf9 946 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 947 group = grec->grec_mca;
948 type = grec->grec_type;
949
8eabf95c 950 len += ntohs(grec->grec_nsrcs) * 4;
ba5ea614 951 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 952 return -EINVAL;
953
954 /* We treat this as an IGMPv2 report for now. */
955 switch (type) {
956 case IGMPV3_MODE_IS_INCLUDE:
957 case IGMPV3_MODE_IS_EXCLUDE:
958 case IGMPV3_CHANGE_TO_INCLUDE:
959 case IGMPV3_CHANGE_TO_EXCLUDE:
960 case IGMPV3_ALLOW_NEW_SOURCES:
961 case IGMPV3_BLOCK_OLD_SOURCES:
962 break;
963
964 default:
965 continue;
966 }
967
6db6f0ea 968 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 969 if ((type == IGMPV3_CHANGE_TO_INCLUDE ||
970 type == IGMPV3_MODE_IS_INCLUDE) &&
971 ntohs(grec->grec_nsrcs) == 0) {
6db6f0ea 972 br_ip4_multicast_leave_group(br, port, group, vid, src);
bc8c20ac 973 } else {
6db6f0ea
FF		 974 err = br_ip4_multicast_add_group(br, port, group, vid,
975 src);
bc8c20ac
SA		 976 if (err)
977 break;
978 }
eb1d1641
HX		 979 }
980
981 return err;
982}
983
dfd56b8b 984#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 985static int br_ip6_multicast_mld2_report(struct net_bridge *br,
986 struct net_bridge_port *port,
06499098
VY		 987 struct sk_buff *skb,
988 u16 vid)
08b202b6 989{
ba5ea614 990 unsigned int nsrcs_offset;
6db6f0ea 991 const unsigned char *src;
08b202b6
YH		 992 struct icmp6hdr *icmp6h;
993 struct mld2_grec *grec;
ba5ea614 994 unsigned int grec_len;
08b202b6
YH		 995 int i;
996 int len;
997 int num;
998 int err = 0;
999
ba5ea614 1000 if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
08b202b6
YH		 1001 return -EINVAL;
1002
1003 icmp6h = icmp6_hdr(skb);
1004 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
c2d4fbd2 1005 len = skb_transport_offset(skb) + sizeof(*icmp6h);
08b202b6
YH		 1006
1007 for (i = 0; i < num; i++) {
1008 __be16 *nsrcs, _nsrcs;
1009
ba5ea614
LL		 1010 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
1011
1012 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
1013 nsrcs_offset + sizeof(_nsrcs))
1014 return -EINVAL;
1015
1016 nsrcs = skb_header_pointer(skb, nsrcs_offset,
08b202b6
YH		 1017 sizeof(_nsrcs), &_nsrcs);
1018 if (!nsrcs)
1019 return -EINVAL;
1020
4154b567 1021 grec_len = struct_size(grec, grec_src, ntohs(*nsrcs));
ba5ea614
LL		 1022
1023 if (!ipv6_mc_may_pull(skb, len + grec_len))
08b202b6
YH		 1024 return -EINVAL;
1025
1026 grec = (struct mld2_grec *)(skb->data + len);
ba5ea614 1027 len += grec_len;
08b202b6
YH		 1028
1029 /* We treat these as MLDv1 reports for now. */
1030 switch (grec->grec_type) {
1031 case MLD2_MODE_IS_INCLUDE:
1032 case MLD2_MODE_IS_EXCLUDE:
1033 case MLD2_CHANGE_TO_INCLUDE:
1034 case MLD2_CHANGE_TO_EXCLUDE:
1035 case MLD2_ALLOW_NEW_SOURCES:
1036 case MLD2_BLOCK_OLD_SOURCES:
1037 break;
1038
1039 default:
1040 continue;
1041 }
1042
6db6f0ea 1043 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 1044 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
1045 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
1046 ntohs(*nsrcs) == 0) {
1047 br_ip6_multicast_leave_group(br, port, &grec->grec_mca,
6db6f0ea 1048 vid, src);
bc8c20ac
SA		 1049 } else {
1050 err = br_ip6_multicast_add_group(br, port,
6db6f0ea
FF		 1051 &grec->grec_mca, vid,
1052 src);
9264251e 1053 if (err)
bc8c20ac
SA		 1054 break;
1055 }
08b202b6
YH		 1056 }
1057
1058 return err;
1059}
1060#endif
1061
dc4eb53a 1062static bool br_ip4_multicast_select_querier(struct net_bridge *br,
2cd41431 1063 struct net_bridge_port *port,
dc4eb53a
LL		 1064 __be32 saddr)
1065{
1066 if (!timer_pending(&br->ip4_own_query.timer) &&
1067 !timer_pending(&br->ip4_other_query.timer))
1068 goto update;
1069
1070 if (!br->ip4_querier.addr.u.ip4)
1071 goto update;
1072
1073 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4))
1074 goto update;
1075
1076 return false;
1077
1078update:
1079 br->ip4_querier.addr.u.ip4 = saddr;
1080
2cd41431
LL		 1081 /* update protected by general multicast_lock by caller */
1082 rcu_assign_pointer(br->ip4_querier.port, port);
1083
dc4eb53a
LL		 1084 return true;
1085}
1086
1087#if IS_ENABLED(CONFIG_IPV6)
1088static bool br_ip6_multicast_select_querier(struct net_bridge *br,
2cd41431 1089 struct net_bridge_port *port,
dc4eb53a
LL		 1090 struct in6_addr *saddr)
1091{
1092 if (!timer_pending(&br->ip6_own_query.timer) &&
1093 !timer_pending(&br->ip6_other_query.timer))
1094 goto update;
1095
1096 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0)
1097 goto update;
1098
1099 return false;
1100
1101update:
1102 br->ip6_querier.addr.u.ip6 = *saddr;
1103
2cd41431
LL		 1104 /* update protected by general multicast_lock by caller */
1105 rcu_assign_pointer(br->ip6_querier.port, port);
1106
dc4eb53a
LL		 1107 return true;
1108}
1109#endif
1110
1111static bool br_multicast_select_querier(struct net_bridge *br,
2cd41431 1112 struct net_bridge_port *port,
dc4eb53a
LL		 1113 struct br_ip *saddr)
1114{
1115 switch (saddr->proto) {
1116 case htons(ETH_P_IP):
2cd41431 1117 return br_ip4_multicast_select_querier(br, port, saddr->u.ip4);
dc4eb53a
LL		 1118#if IS_ENABLED(CONFIG_IPV6)
1119 case htons(ETH_P_IPV6):
2cd41431 1120 return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6);
dc4eb53a
LL		 1121#endif
1122 }
1123
1124 return false;
1125}
1126
cc0fdd80 1127static void
90010b36
LL		 1128br_multicast_update_query_timer(struct net_bridge *br,
1129 struct bridge_mcast_other_query *query,
1130 unsigned long max_delay)
b00589af 1131{
90010b36
LL		 1132 if (!timer_pending(&query->timer))
1133 query->delay_time = jiffies + max_delay;
b00589af 1134
90010b36 1135 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
b00589af
LL		 1136}
1137
6d549648
NF		 1138static void br_port_mc_router_state_change(struct net_bridge_port *p,
1139 bool is_mc_router)
1140{
1141 struct switchdev_attr attr = {
1142 .orig_dev = p->dev,
1143 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
1144 .flags = SWITCHDEV_F_DEFER,
1145 .u.mrouter = is_mc_router,
1146 };
1147
1148 switchdev_port_attr_set(p->dev, &attr);
1149}
1150
7e80c124 1151/*
7c77602f 1152 * Add port to router_list
7e80c124 1153 * list is maintained ordered by pointer value
1154 * and locked by br->multicast_lock and RCU
1155 */
0909e117
HX		 1156static void br_multicast_add_router(struct net_bridge *br,
1157 struct net_bridge_port *port)
1158{
dcdca2c4 1159 struct net_bridge_port *p;
b67bfe0d 1160 struct hlist_node *slot = NULL;
dcdca2c4 1161
1a040eac
NA		 1162 if (!hlist_unhashed(&port->rlist))
1163 return;
1164
b67bfe0d 1165 hlist_for_each_entry(p, &br->router_list, rlist) {
7e80c124 1166 if ((unsigned long) port >= (unsigned long) p)
1167 break;
b67bfe0d 1168 slot = &p->rlist;
dcdca2c4 1169 }
1170
7e80c124 1171 if (slot)
1d023284 1172 hlist_add_behind_rcu(&port->rlist, slot);
dcdca2c4 1173 else
1174 hlist_add_head_rcu(&port->rlist, &br->router_list);
949f1e39 1175 br_rtr_notify(br->dev, port, RTM_NEWMDB);
6d549648 1176 br_port_mc_router_state_change(port, true);
0909e117
HX		 1177}
1178
eb1d1641
HX		 1179static void br_multicast_mark_router(struct net_bridge *br,
1180 struct net_bridge_port *port)
1181{
1182 unsigned long now = jiffies;
eb1d1641
HX		 1183
1184 if (!port) {
77041420
YG		 1185 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
1186 if (!timer_pending(&br->multicast_router_timer))
1187 br_mc_router_state_change(br, true);
eb1d1641
HX		 1188 mod_timer(&br->multicast_router_timer,
1189 now + br->multicast_querier_interval);
77041420 1190 }
eb1d1641
HX		 1191 return;
1192 }
1193
a55d8246
NA		 1194 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1195 port->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 1196 return;
1197
0909e117 1198 br_multicast_add_router(br, port);
eb1d1641 1199
eb1d1641
HX		 1200 mod_timer(&port->multicast_router_timer,
1201 now + br->multicast_querier_interval);
1202}
1203
1204static void br_multicast_query_received(struct net_bridge *br,
1205 struct net_bridge_port *port,
90010b36 1206 struct bridge_mcast_other_query *query,
dc4eb53a 1207 struct br_ip *saddr,
b00589af 1208 unsigned long max_delay)
eb1d1641 1209{
2cd41431 1210 if (!br_multicast_select_querier(br, port, saddr))
eb1d1641
HX		 1211 return;
1212
dc4eb53a 1213 br_multicast_update_query_timer(br, query, max_delay);
278e2148 1214 br_multicast_mark_router(br, port);
eb1d1641
HX		 1215}
1216
9c2e955c 1217static void br_ip4_multicast_query(struct net_bridge *br,
1218 struct net_bridge_port *port,
1219 struct sk_buff *skb,
1220 u16 vid)
eb1d1641 1221{
ba5ea614 1222 unsigned int transport_len = ip_transport_len(skb);
b71d1d42 1223 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 1224 struct igmphdr *ih = igmp_hdr(skb);
1225 struct net_bridge_mdb_entry *mp;
1226 struct igmpv3_query *ih3;
1227 struct net_bridge_port_group *p;
e8051688 1228 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1229 struct br_ip saddr;
eb1d1641
HX		 1230 unsigned long max_delay;
1231 unsigned long now = jiffies;
1232 __be32 group;
1233
1234 spin_lock(&br->multicast_lock);
1235 if (!netif_running(br->dev) ||
1236 (port && port->state == BR_STATE_DISABLED))
1237 goto out;
1238
eb1d1641
HX		 1239 group = ih->group;
1240
ba5ea614 1241 if (transport_len == sizeof(*ih)) {
eb1d1641
HX		 1242 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
1243
1244 if (!max_delay) {
1245 max_delay = 10 * HZ;
1246 group = 0;
1247 }
ba5ea614 1248 } else if (transport_len >= sizeof(*ih3)) {
eb1d1641
HX		 1249 ih3 = igmpv3_query_hdr(skb);
1250 if (ih3->nsrcs)
bec68ff1 1251 goto out;
eb1d1641 1252
0ba8c9ec
YH		 1253 max_delay = ih3->code ?
1254 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 1255 } else {
9ed973cc
LL		 1256 goto out;
1257 }
1258
dc4eb53a
LL		 1259 if (!group) {
1260 saddr.proto = htons(ETH_P_IP);
1261 saddr.u.ip4 = iph->saddr;
b00589af 1262
dc4eb53a
LL		 1263 br_multicast_query_received(br, port, &br->ip4_other_query,
1264 &saddr, max_delay);
eb1d1641 1265 goto out;
dc4eb53a 1266 }
eb1d1641 1267
19e3a9c9 1268 mp = br_mdb_ip4_get(br, group, vid);
eb1d1641
HX		 1269 if (!mp)
1270 goto out;
1271
1272 max_delay *= br->multicast_last_member_count;
1273
ff0fd34e 1274 if (mp->host_joined &&
eb1d1641
HX		 1275 (timer_pending(&mp->timer) ?
1276 time_after(mp->timer.expires, now + max_delay) :
1277 try_to_del_timer_sync(&mp->timer) >= 0))
1278 mod_timer(&mp->timer, now + max_delay);
1279
e8051688
ED		 1280 for (pp = &mp->ports;
1281 (p = mlock_dereference(*pp, br)) != NULL;
1282 pp = &p->next) {
eb1d1641
HX		 1283 if (timer_pending(&p->timer) ?
1284 time_after(p->timer.expires, now + max_delay) :
1285 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1286 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 1287 }
1288
1289out:
1290 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 1291}
1292
dfd56b8b 1293#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1294static int br_ip6_multicast_query(struct net_bridge *br,
1295 struct net_bridge_port *port,
06499098
VY		 1296 struct sk_buff *skb,
1297 u16 vid)
08b202b6 1298{
ba5ea614 1299 unsigned int transport_len = ipv6_transport_len(skb);
b71d1d42 1300 const struct ipv6hdr *ip6h = ipv6_hdr(skb);
eca2a43b 1301 struct mld_msg *mld;
08b202b6
YH		 1302 struct net_bridge_mdb_entry *mp;
1303 struct mld2_query *mld2q;
e8051688
ED		 1304 struct net_bridge_port_group *p;
1305 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1306 struct br_ip saddr;
08b202b6
YH		 1307 unsigned long max_delay;
1308 unsigned long now = jiffies;
856ce5d0 1309 unsigned int offset = skb_transport_offset(skb);
b71d1d42 1310 const struct in6_addr *group = NULL;
9ed973cc 1311 bool is_general_query;
08b202b6
YH		 1312 int err = 0;
1313
1314 spin_lock(&br->multicast_lock);
1315 if (!netif_running(br->dev) ||
1316 (port && port->state == BR_STATE_DISABLED))
1317 goto out;
1318
ba5ea614 1319 if (transport_len == sizeof(*mld)) {
856ce5d0 1320 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 1321 err = -EINVAL;
1322 goto out;
1323 }
1324 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 1325 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 1326 if (max_delay)
1327 group = &mld->mld_mca;
248ba8ec 1328 } else {
856ce5d0 1329 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 1330 err = -EINVAL;
1331 goto out;
1332 }
1333 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1334 if (!mld2q->mld2q_nsrcs)
1335 group = &mld2q->mld2q_mca;
e3f5b170
DB		 1336
1337 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 1338 }
1339
9ed973cc
LL		 1340 is_general_query = group && ipv6_addr_any(group);
1341
dc4eb53a
LL		 1342 if (is_general_query) {
1343 saddr.proto = htons(ETH_P_IPV6);
1344 saddr.u.ip6 = ip6h->saddr;
b00589af 1345
dc4eb53a
LL		 1346 br_multicast_query_received(br, port, &br->ip6_other_query,
1347 &saddr, max_delay);
08b202b6 1348 goto out;
6c03ee8b
LL		 1349 } else if (!group) {
1350 goto out;
dc4eb53a 1351 }
08b202b6 1352
19e3a9c9 1353 mp = br_mdb_ip6_get(br, group, vid);
08b202b6
YH		 1354 if (!mp)
1355 goto out;
1356
1357 max_delay *= br->multicast_last_member_count;
ff0fd34e 1358 if (mp->host_joined &&
08b202b6
YH		 1359 (timer_pending(&mp->timer) ?
1360 time_after(mp->timer.expires, now + max_delay) :
1361 try_to_del_timer_sync(&mp->timer) >= 0))
1362 mod_timer(&mp->timer, now + max_delay);
1363
e8051688
ED		 1364 for (pp = &mp->ports;
1365 (p = mlock_dereference(*pp, br)) != NULL;
1366 pp = &p->next) {
08b202b6
YH		 1367 if (timer_pending(&p->timer) ?
1368 time_after(p->timer.expires, now + max_delay) :
1369 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1370 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 1371 }
1372
1373out:
1374 spin_unlock(&br->multicast_lock);
1375 return err;
1376}
1377#endif
1378
90010b36
LL		 1379static void
1380br_multicast_leave_group(struct net_bridge *br,
1381 struct net_bridge_port *port,
1382 struct br_ip *group,
1383 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 1384 struct bridge_mcast_own_query *own_query,
1385 const unsigned char *src)
eb1d1641 1386{
eb1d1641
HX		 1387 struct net_bridge_mdb_entry *mp;
1388 struct net_bridge_port_group *p;
1389 unsigned long now;
1390 unsigned long time;
1391
eb1d1641
HX		 1392 spin_lock(&br->multicast_lock);
1393 if (!netif_running(br->dev) ||
544586f7 1394 (port && port->state == BR_STATE_DISABLED))
eb1d1641
HX		 1395 goto out;
1396
19e3a9c9 1397 mp = br_mdb_ip_get(br, group);
eb1d1641
HX		 1398 if (!mp)
1399 goto out;
1400
544586f7
SA		 1401 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
1402 struct net_bridge_port_group __rcu **pp;
1403
1404 for (pp = &mp->ports;
1405 (p = mlock_dereference(*pp, br)) != NULL;
1406 pp = &p->next) {
6db6f0ea 1407 if (!br_port_group_equal(p, port, src))
544586f7
SA		 1408 continue;
1409
1410 rcu_assign_pointer(*pp, p->next);
1411 hlist_del_init(&p->mglist);
1412 del_timer(&p->timer);
4329596c 1413 kfree_rcu(p, rcu);
45ebcce5
ER		 1414 br_mdb_notify(br->dev, port, group, RTM_DELMDB,
1415 p->flags);
544586f7 1416
ff0fd34e 1417 if (!mp->ports && !mp->host_joined &&
544586f7
SA		 1418 netif_running(br->dev))
1419 mod_timer(&mp->timer, jiffies);
1420 }
1421 goto out;
1422 }
1423
1424 if (timer_pending(&other_query->timer))
1425 goto out;
1426
675779ad 1427 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
6b7df111
CW		 1428 __br_multicast_send_query(br, port, &mp->addr);
1429
1430 time = jiffies + br->multicast_last_member_count *
1431 br->multicast_last_member_interval;
cc0fdd80 1432
90010b36 1433 mod_timer(&own_query->timer, time);
6b7df111
CW		 1434
1435 for (p = mlock_dereference(mp->ports, br);
1436 p != NULL;
1437 p = mlock_dereference(p->next, br)) {
6db6f0ea 1438 if (!br_port_group_equal(p, port, src))
6b7df111
CW		 1439 continue;
1440
1441 if (!hlist_unhashed(&p->mglist) &&
1442 (timer_pending(&p->timer) ?
1443 time_after(p->timer.expires, time) :
1444 try_to_del_timer_sync(&p->timer) >= 0)) {
1445 mod_timer(&p->timer, time);
1446 }
1447
1448 break;
1449 }
1450 }
1451
eb1d1641
HX		 1452 now = jiffies;
1453 time = now + br->multicast_last_member_count *
1454 br->multicast_last_member_interval;
1455
1456 if (!port) {
ff0fd34e 1457 if (mp->host_joined &&
eb1d1641
HX		 1458 (timer_pending(&mp->timer) ?
1459 time_after(mp->timer.expires, time) :
1460 try_to_del_timer_sync(&mp->timer) >= 0)) {
1461 mod_timer(&mp->timer, time);
eb1d1641 1462 }
454594f3
LL		 1463
1464 goto out;
1465 }
1466
1467 for (p = mlock_dereference(mp->ports, br);
1468 p != NULL;
1469 p = mlock_dereference(p->next, br)) {
1470 if (p->port != port)
1471 continue;
1472
1473 if (!hlist_unhashed(&p->mglist) &&
1474 (timer_pending(&p->timer) ?
1475 time_after(p->timer.expires, time) :
1476 try_to_del_timer_sync(&p->timer) >= 0)) {
1477 mod_timer(&p->timer, time);
1478 }
1479
1480 break;
eb1d1641 1481 }
eb1d1641
HX		 1482out:
1483 spin_unlock(&br->multicast_lock);
1484}
1485
8ef2a9a5
YH		 1486static void br_ip4_multicast_leave_group(struct net_bridge *br,
1487 struct net_bridge_port *port,
b0e9a30d 1488 __be32 group,
6db6f0ea
FF		 1489 __u16 vid,
1490 const unsigned char *src)
8ef2a9a5
YH		 1491{
1492 struct br_ip br_group;
90010b36 1493 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 1494
1495 if (ipv4_is_local_multicast(group))
1496 return;
1497
90010b36
LL		 1498 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
1499
8ef2a9a5
YH		 1500 br_group.u.ip4 = group;
1501 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1502 br_group.vid = vid;
8ef2a9a5 1503
90010b36 1504 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
6db6f0ea 1505 own_query, src);
8ef2a9a5
YH		 1506}
1507
dfd56b8b 1508#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1509static void br_ip6_multicast_leave_group(struct net_bridge *br,
1510 struct net_bridge_port *port,
b0e9a30d 1511 const struct in6_addr *group,
6db6f0ea
FF		 1512 __u16 vid,
1513 const unsigned char *src)
08b202b6
YH		 1514{
1515 struct br_ip br_group;
90010b36 1516 struct bridge_mcast_own_query *own_query;
08b202b6 1517
3c3769e6 1518 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1519 return;
1520
90010b36
LL		 1521 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
1522
4e3fd7a0 1523 br_group.u.ip6 = *group;
08b202b6 1524 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1525 br_group.vid = vid;
08b202b6 1526
90010b36 1527 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
6db6f0ea 1528 own_query, src);
08b202b6
YH		 1529}
1530#endif
8ef2a9a5 1531
1080ab95
NA		 1532static void br_multicast_err_count(const struct net_bridge *br,
1533 const struct net_bridge_port *p,
1534 __be16 proto)
1535{
1536 struct bridge_mcast_stats __percpu *stats;
1537 struct bridge_mcast_stats *pstats;
1538
675779ad 1539 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 1540 return;
1541
1542 if (p)
1543 stats = p->mcast_stats;
1544 else
1545 stats = br->mcast_stats;
1546 if (WARN_ON(!stats))
1547 return;
1548
1549 pstats = this_cpu_ptr(stats);
1550
1551 u64_stats_update_begin(&pstats->syncp);
1552 switch (proto) {
1553 case htons(ETH_P_IP):
1554 pstats->mstats.igmp_parse_errors++;
1555 break;
1556#if IS_ENABLED(CONFIG_IPV6)
1557 case htons(ETH_P_IPV6):
1558 pstats->mstats.mld_parse_errors++;
1559 break;
1560#endif
1561 }
1562 u64_stats_update_end(&pstats->syncp);
1563}
1564
91b02d3d
NA		 1565static void br_multicast_pim(struct net_bridge *br,
1566 struct net_bridge_port *port,
1567 const struct sk_buff *skb)
1568{
1569 unsigned int offset = skb_transport_offset(skb);
1570 struct pimhdr *pimhdr, _pimhdr;
1571
1572 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
1573 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
1574 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
1575 return;
1576
1577 br_multicast_mark_router(br, port);
1578}
1579
4b3087c7
LL		 1580static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
1581 struct net_bridge_port *port,
1582 struct sk_buff *skb)
1583{
1584 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
1585 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
1586 return -ENOMSG;
1587
1588 br_multicast_mark_router(br, port);
1589
1590 return 0;
1591}
1592
eb1d1641
HX		 1593static int br_multicast_ipv4_rcv(struct net_bridge *br,
1594 struct net_bridge_port *port,
06499098
VY		 1595 struct sk_buff *skb,
1596 u16 vid)
eb1d1641 1597{
6db6f0ea 1598 const unsigned char *src;
eb1d1641 1599 struct igmphdr *ih;
eb1d1641
HX		 1600 int err;
1601
ba5ea614 1602 err = ip_mc_check_igmp(skb);
eb1d1641 1603
9afd85c9 1604 if (err == -ENOMSG) {
91b02d3d 1605 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 1606 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 1607 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
1608 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
1609 br_multicast_pim(br, port, skb);
4b3087c7 1610 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
08e71623 1611 br_ip4_multicast_mrd_rcv(br, port, skb);
91b02d3d 1612 }
4b3087c7 1613
eb1d1641 1614 return 0;
9afd85c9 1615 } else if (err < 0) {
1080ab95 1616 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 1617 return err;
bd4265fe 1618 }
eb1d1641 1619
9afd85c9 1620 ih = igmp_hdr(skb);
6db6f0ea 1621 src = eth_hdr(skb)->h_source;
1080ab95 1622 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
eb1d1641
HX		 1623
1624 switch (ih->type) {
1625 case IGMP_HOST_MEMBERSHIP_REPORT:
1626 case IGMPV2_HOST_MEMBERSHIP_REPORT:
62b2bcb4 1627 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
6db6f0ea 1628 err = br_ip4_multicast_add_group(br, port, ih->group, vid, src);
eb1d1641
HX		 1629 break;
1630 case IGMPV3_HOST_MEMBERSHIP_REPORT:
ba5ea614 1631 err = br_ip4_multicast_igmp3_report(br, port, skb, vid);
eb1d1641
HX		 1632 break;
1633 case IGMP_HOST_MEMBERSHIP_QUERY:
ba5ea614 1634 br_ip4_multicast_query(br, port, skb, vid);
eb1d1641
HX		 1635 break;
1636 case IGMP_HOST_LEAVE_MESSAGE:
6db6f0ea 1637 br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
eb1d1641
HX		 1638 break;
1639 }
1640
a65056ec 1641 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1642 BR_MCAST_DIR_RX);
1643
eb1d1641
HX		 1644 return err;
1645}
1646
dfd56b8b 1647#if IS_ENABLED(CONFIG_IPV6)
4b3087c7
LL		 1648static int br_ip6_multicast_mrd_rcv(struct net_bridge *br,
1649 struct net_bridge_port *port,
1650 struct sk_buff *skb)
1651{
1652 int ret;
1653
1654 if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
1655 return -ENOMSG;
1656
1657 ret = ipv6_mc_check_icmpv6(skb);
1658 if (ret < 0)
1659 return ret;
1660
1661 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
1662 return -ENOMSG;
1663
1664 br_multicast_mark_router(br, port);
1665
1666 return 0;
1667}
1668
08b202b6
YH		 1669static int br_multicast_ipv6_rcv(struct net_bridge *br,
1670 struct net_bridge_port *port,
06499098
VY		 1671 struct sk_buff *skb,
1672 u16 vid)
08b202b6 1673{
6db6f0ea 1674 const unsigned char *src;
9afd85c9 1675 struct mld_msg *mld;
08b202b6
YH		 1676 int err;
1677
ba5ea614 1678 err = ipv6_mc_check_mld(skb);
08b202b6 1679
9afd85c9
LL		 1680 if (err == -ENOMSG) {
1681 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
1682 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
4b3087c7
LL		 1683
1684 if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) {
1685 err = br_ip6_multicast_mrd_rcv(br, port, skb);
1686
1687 if (err < 0 && err != -ENOMSG) {
1688 br_multicast_err_count(br, port, skb->protocol);
1689 return err;
1690 }
1691 }
1692
08b202b6 1693 return 0;
9afd85c9 1694 } else if (err < 0) {
1080ab95 1695 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 1696 return err;
08b202b6
YH		 1697 }
1698
9afd85c9 1699 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 1700 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 1701
9afd85c9 1702 switch (mld->mld_type) {
08b202b6 1703 case ICMPV6_MGM_REPORT:
6db6f0ea 1704 src = eth_hdr(skb)->h_source;
fc2af6c7 1705 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
6db6f0ea
FF		 1706 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
1707 src);
08b202b6 1708 break;
08b202b6 1709 case ICMPV6_MLD2_REPORT:
ba5ea614 1710 err = br_ip6_multicast_mld2_report(br, port, skb, vid);
08b202b6
YH		 1711 break;
1712 case ICMPV6_MGM_QUERY:
ba5ea614 1713 err = br_ip6_multicast_query(br, port, skb, vid);
08b202b6
YH		 1714 break;
1715 case ICMPV6_MGM_REDUCTION:
6db6f0ea
FF		 1716 src = eth_hdr(skb)->h_source;
1717 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
9afd85c9 1718 break;
08b202b6
YH		 1719 }
1720
a65056ec 1721 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1722 BR_MCAST_DIR_RX);
1723
08b202b6
YH		 1724 return err;
1725}
1726#endif
1727
eb1d1641 1728int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
06499098 1729 struct sk_buff *skb, u16 vid)
eb1d1641 1730{
1080ab95
NA		 1731 int ret = 0;
1732
1fafc7a9
YH		 1733 BR_INPUT_SKB_CB(skb)->igmp = 0;
1734 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
1735
13cefad2 1736 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 1737 return 0;
1738
1739 switch (skb->protocol) {
1740 case htons(ETH_P_IP):
1080ab95
NA		 1741 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
1742 break;
dfd56b8b 1743#if IS_ENABLED(CONFIG_IPV6)
08b202b6 1744 case htons(ETH_P_IPV6):
1080ab95
NA		 1745 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
1746 break;
08b202b6 1747#endif
eb1d1641
HX		 1748 }
1749
1080ab95 1750 return ret;
eb1d1641
HX		 1751}
1752
cc0fdd80 1753static void br_multicast_query_expired(struct net_bridge *br,
2cd41431
LL		 1754 struct bridge_mcast_own_query *query,
1755 struct bridge_mcast_querier *querier)
cc0fdd80
LL		 1756{
1757 spin_lock(&br->multicast_lock);
1758 if (query->startup_sent < br->multicast_startup_query_count)
1759 query->startup_sent++;
1760
71d9f614 1761 RCU_INIT_POINTER(querier->port, NULL);
cc0fdd80
LL		 1762 br_multicast_send_query(br, NULL, query);
1763 spin_unlock(&br->multicast_lock);
1764}
1765
88c1f37f 1766static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 1767{
88c1f37f 1768 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
eb1d1641 1769
2cd41431 1770 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
cc0fdd80 1771}
eb1d1641 1772
cc0fdd80 1773#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1774static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 1775{
88c1f37f 1776 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
eb1d1641 1777
2cd41431 1778 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
eb1d1641 1779}
cc0fdd80 1780#endif
eb1d1641
HX		 1781
1782void br_multicast_init(struct net_bridge *br)
1783{
d08c6bc0 1784 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
eb1d1641 1785
7f0aec7a 1786 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641
HX		 1787 br->multicast_last_member_count = 2;
1788 br->multicast_startup_query_count = 2;
1789
1790 br->multicast_last_member_interval = HZ;
1791 br->multicast_query_response_interval = 10 * HZ;
1792 br->multicast_startup_query_interval = 125 * HZ / 4;
1793 br->multicast_query_interval = 125 * HZ;
1794 br->multicast_querier_interval = 255 * HZ;
1795 br->multicast_membership_interval = 260 * HZ;
1796
90010b36 1797 br->ip4_other_query.delay_time = 0;
2cd41431 1798 br->ip4_querier.port = NULL;
aa2ae3e7 1799 br->multicast_igmp_version = 2;
cc0fdd80 1800#if IS_ENABLED(CONFIG_IPV6)
aa2ae3e7 1801 br->multicast_mld_version = 1;
90010b36 1802 br->ip6_other_query.delay_time = 0;
2cd41431 1803 br->ip6_querier.port = NULL;
cc0fdd80 1804#endif
6919622a 1805 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
675779ad 1806 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
b00589af 1807
eb1d1641 1808 spin_lock_init(&br->multicast_lock);
88c1f37f
AP		 1809 timer_setup(&br->multicast_router_timer,
1810 br_multicast_local_router_expired, 0);
1811 timer_setup(&br->ip4_other_query.timer,
1812 br_ip4_multicast_querier_expired, 0);
1813 timer_setup(&br->ip4_own_query.timer,
1814 br_ip4_multicast_query_expired, 0);
cc0fdd80 1815#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 1816 timer_setup(&br->ip6_other_query.timer,
1817 br_ip6_multicast_querier_expired, 0);
1818 timer_setup(&br->ip6_own_query.timer,
1819 br_ip6_multicast_query_expired, 0);
cc0fdd80 1820#endif
19e3a9c9 1821 INIT_HLIST_HEAD(&br->mdb_list);
eb1d1641
HX		 1822}
1823
4effd28c
LL		 1824static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
1825{
1826 struct in_device *in_dev = in_dev_get(br->dev);
1827
1828 if (!in_dev)
1829 return;
1830
9fb20801 1831 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 1832 in_dev_put(in_dev);
1833}
1834
1835#if IS_ENABLED(CONFIG_IPV6)
1836static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
1837{
1838 struct in6_addr addr;
1839
1840 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
1841 ipv6_dev_mc_inc(br->dev, &addr);
1842}
1843#else
1844static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
1845{
1846}
1847#endif
1848
1849static void br_multicast_join_snoopers(struct net_bridge *br)
1850{
1851 br_ip4_multicast_join_snoopers(br);
1852 br_ip6_multicast_join_snoopers(br);
1853}
1854
1855static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
1856{
1857 struct in_device *in_dev = in_dev_get(br->dev);
1858
1859 if (WARN_ON(!in_dev))
1860 return;
1861
9fb20801 1862 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 1863 in_dev_put(in_dev);
1864}
1865
1866#if IS_ENABLED(CONFIG_IPV6)
1867static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
1868{
1869 struct in6_addr addr;
1870
1871 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
1872 ipv6_dev_mc_dec(br->dev, &addr);
1873}
1874#else
1875static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
1876{
1877}
1878#endif
1879
1880static void br_multicast_leave_snoopers(struct net_bridge *br)
1881{
1882 br_ip4_multicast_leave_snoopers(br);
1883 br_ip6_multicast_leave_snoopers(br);
1884}
1885
cc0fdd80 1886static void __br_multicast_open(struct net_bridge *br,
90010b36 1887 struct bridge_mcast_own_query *query)
eb1d1641 1888{
cc0fdd80 1889 query->startup_sent = 0;
eb1d1641 1890
13cefad2 1891 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 1892 return;
1893
cc0fdd80
LL		 1894 mod_timer(&query->timer, jiffies);
1895}
1896
1897void br_multicast_open(struct net_bridge *br)
1898{
4effd28c
LL		 1899 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
1900 br_multicast_join_snoopers(br);
1901
90010b36 1902 __br_multicast_open(br, &br->ip4_own_query);
cc0fdd80 1903#if IS_ENABLED(CONFIG_IPV6)
90010b36 1904 __br_multicast_open(br, &br->ip6_own_query);
cc0fdd80 1905#endif
eb1d1641
HX		 1906}
1907
1908void br_multicast_stop(struct net_bridge *br)
1909{
eb1d1641 1910 del_timer_sync(&br->multicast_router_timer);
90010b36
LL		 1911 del_timer_sync(&br->ip4_other_query.timer);
1912 del_timer_sync(&br->ip4_own_query.timer);
cc0fdd80 1913#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 1914 del_timer_sync(&br->ip6_other_query.timer);
1915 del_timer_sync(&br->ip6_own_query.timer);
cc0fdd80 1916#endif
4effd28c
LL		 1917
1918 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
1919 br_multicast_leave_snoopers(br);
e10177ab
SA		 1920}
1921
1922void br_multicast_dev_del(struct net_bridge *br)
1923{
e10177ab 1924 struct net_bridge_mdb_entry *mp;
19e3a9c9 1925 struct hlist_node *tmp;
eb1d1641
HX		 1926
1927 spin_lock_bh(&br->multicast_lock);
19e3a9c9
NA		 1928 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) {
1929 del_timer(&mp->timer);
1930 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
1931 br_mdb_rht_params);
1932 hlist_del_rcu(&mp->mdb_node);
4329596c 1933 kfree_rcu(mp, rcu);
eb1d1641 1934 }
eb1d1641 1935 spin_unlock_bh(&br->multicast_lock);
19e3a9c9 1936
4329596c 1937 rcu_barrier();
eb1d1641 1938}
0909e117
HX		 1939
1940int br_multicast_set_router(struct net_bridge *br, unsigned long val)
1941{
6ae4ae8e 1942 int err = -EINVAL;
0909e117
HX		 1943
1944 spin_lock_bh(&br->multicast_lock);
0909e117
HX		 1945
1946 switch (val) {
7f0aec7a
NA		 1947 case MDB_RTR_TYPE_DISABLED:
1948 case MDB_RTR_TYPE_PERM:
77041420 1949 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
0909e117 1950 del_timer(&br->multicast_router_timer);
77041420
YG		 1951 br->multicast_router = val;
1952 err = 0;
1953 break;
7f0aec7a 1954 case MDB_RTR_TYPE_TEMP_QUERY:
77041420
YG		 1955 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
1956 br_mc_router_state_change(br, false);
0909e117
HX		 1957 br->multicast_router = val;
1958 err = 0;
1959 break;
0909e117
HX		 1960 }
1961
0909e117
HX		 1962 spin_unlock_bh(&br->multicast_lock);
1963
1964 return err;
1965}
1966
7f0aec7a
NA		 1967static void __del_port_router(struct net_bridge_port *p)
1968{
1969 if (hlist_unhashed(&p->rlist))
1970 return;
1971 hlist_del_init_rcu(&p->rlist);
1972 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
6d549648 1973 br_port_mc_router_state_change(p, false);
f12e7d95
NF		 1974
1975 /* don't allow timer refresh */
1976 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
1977 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 1978}
1979
0909e117
HX		 1980int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
1981{
1982 struct net_bridge *br = p->br;
a55d8246 1983 unsigned long now = jiffies;
6ae4ae8e 1984 int err = -EINVAL;
0909e117
HX		 1985
1986 spin_lock(&br->multicast_lock);
4950cfd1 1987 if (p->multicast_router == val) {
a55d8246
NA		 1988 /* Refresh the temp router port timer */
1989 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
1990 mod_timer(&p->multicast_router_timer,
1991 now + br->multicast_querier_interval);
4950cfd1
NA		 1992 err = 0;
1993 goto unlock;
1994 }
0909e117 1995 switch (val) {
7f0aec7a
NA		 1996 case MDB_RTR_TYPE_DISABLED:
1997 p->multicast_router = MDB_RTR_TYPE_DISABLED;
1998 __del_port_router(p);
1999 del_timer(&p->multicast_router_timer);
2000 break;
2001 case MDB_RTR_TYPE_TEMP_QUERY:
2002 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
2003 __del_port_router(p);
2004 break;
2005 case MDB_RTR_TYPE_PERM:
2006 p->multicast_router = MDB_RTR_TYPE_PERM;
0909e117 2007 del_timer(&p->multicast_router_timer);
0909e117
HX		 2008 br_multicast_add_router(br, p);
2009 break;
a55d8246
NA		 2010 case MDB_RTR_TYPE_TEMP:
2011 p->multicast_router = MDB_RTR_TYPE_TEMP;
2012 br_multicast_mark_router(br, p);
2013 break;
7f0aec7a
NA		 2014 default:
2015 goto unlock;
0909e117 2016 }
7f0aec7a
NA		 2017 err = 0;
2018unlock:
0909e117
HX		 2019 spin_unlock(&br->multicast_lock);
2020
2021 return err;
2022}
561f1103 2023
cc0fdd80 2024static void br_multicast_start_querier(struct net_bridge *br,
90010b36 2025 struct bridge_mcast_own_query *query)
561f1103
HX		 2026{
2027 struct net_bridge_port *port;
74857216 2028
cc0fdd80 2029 __br_multicast_open(br, query);
74857216
HX		 2030
2031 list_for_each_entry(port, &br->port_list, list) {
2032 if (port->state == BR_STATE_DISABLED ||
2033 port->state == BR_STATE_BLOCKING)
2034 continue;
2035
90010b36
LL		 2036 if (query == &br->ip4_own_query)
2037 br_multicast_enable(&port->ip4_own_query);
cc0fdd80
LL		 2038#if IS_ENABLED(CONFIG_IPV6)
2039 else
90010b36 2040 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 2041#endif
74857216
HX		 2042 }
2043}
2044
2045int br_multicast_toggle(struct net_bridge *br, unsigned long val)
2046{
7cb3f921 2047 struct net_bridge_port *port;
561f1103 2048
ef5e0d82 2049 spin_lock_bh(&br->multicast_lock);
13cefad2 2050 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 2051 goto unlock;
2052
13cefad2
NA		 2053 br_mc_disabled_update(br->dev, val);
2054 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4effd28c
LL		 2055 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
2056 br_multicast_leave_snoopers(br);
561f1103 2057 goto unlock;
4effd28c 2058 }
561f1103 2059
3a7fda06
HX		 2060 if (!netif_running(br->dev))
2061 goto unlock;
2062
7cb3f921
NA		 2063 br_multicast_open(br);
2064 list_for_each_entry(port, &br->port_list, list)
2065 __br_multicast_enable_port(port);
561f1103
HX		 2066
2067unlock:
ef5e0d82 2068 spin_unlock_bh(&br->multicast_lock);
561f1103 2069
a26d94bf 2070 return 0;
561f1103 2071}
b195167f 2072
9341b988
IS		 2073bool br_multicast_enabled(const struct net_device *dev)
2074{
2075 struct net_bridge *br = netdev_priv(dev);
2076
13cefad2 2077 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 2078}
2079EXPORT_SYMBOL_GPL(br_multicast_enabled);
2080
0912bda4
YG		 2081bool br_multicast_router(const struct net_device *dev)
2082{
2083 struct net_bridge *br = netdev_priv(dev);
2084 bool is_router;
2085
2086 spin_lock_bh(&br->multicast_lock);
2087 is_router = br_multicast_is_router(br);
2088 spin_unlock_bh(&br->multicast_lock);
2089 return is_router;
2090}
2091EXPORT_SYMBOL_GPL(br_multicast_router);
2092
c5c23260
HX		 2093int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
2094{
b00589af
LL		 2095 unsigned long max_delay;
2096
c5c23260
HX		 2097 val = !!val;
2098
2099 spin_lock_bh(&br->multicast_lock);
675779ad 2100 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
c5c23260
HX		 2101 goto unlock;
2102
675779ad 2103 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
b00589af
LL		 2104 if (!val)
2105 goto unlock;
2106
2107 max_delay = br->multicast_query_response_interval;
b00589af 2108
90010b36
LL		 2109 if (!timer_pending(&br->ip4_other_query.timer))
2110 br->ip4_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2111
90010b36 2112 br_multicast_start_querier(br, &br->ip4_own_query);
cc0fdd80
LL		 2113
2114#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 2115 if (!timer_pending(&br->ip6_other_query.timer))
2116 br->ip6_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2117
90010b36 2118 br_multicast_start_querier(br, &br->ip6_own_query);
cc0fdd80 2119#endif
c5c23260
HX		 2120
2121unlock:
2122 spin_unlock_bh(&br->multicast_lock);
2123
2124 return 0;
2125}
2126
5e923585
NA		 2127int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
2128{
2129 /* Currently we support only version 2 and 3 */
2130 switch (val) {
2131 case 2:
2132 case 3:
2133 break;
2134 default:
2135 return -EINVAL;
2136 }
2137
2138 spin_lock_bh(&br->multicast_lock);
2139 br->multicast_igmp_version = val;
2140 spin_unlock_bh(&br->multicast_lock);
2141
2142 return 0;
2143}
2144
aa2ae3e7
NA		 2145#if IS_ENABLED(CONFIG_IPV6)
2146int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
2147{
2148 /* Currently we support version 1 and 2 */
2149 switch (val) {
2150 case 1:
2151 case 2:
2152 break;
2153 default:
2154 return -EINVAL;
2155 }
2156
2157 spin_lock_bh(&br->multicast_lock);
2158 br->multicast_mld_version = val;
2159 spin_unlock_bh(&br->multicast_lock);
2160
2161 return 0;
2162}
2163#endif
2164
07f8ac4a
LL		 2165/**
2166 * br_multicast_list_adjacent - Returns snooped multicast addresses
2167 * @dev: The bridge port adjacent to which to retrieve addresses
2168 * @br_ip_list: The list to store found, snooped multicast IP addresses in
2169 *
2170 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
2171 * snooping feature on all bridge ports of dev's bridge device, excluding
2172 * the addresses from dev itself.
2173 *
2174 * Returns the number of items added to br_ip_list.
2175 *
2176 * Notes:
2177 * - br_ip_list needs to be initialized by caller
2178 * - br_ip_list might contain duplicates in the end
2179 * (needs to be taken care of by caller)
2180 * - br_ip_list needs to be freed by caller
2181 */
2182int br_multicast_list_adjacent(struct net_device *dev,
2183 struct list_head *br_ip_list)
2184{
2185 struct net_bridge *br;
2186 struct net_bridge_port *port;
2187 struct net_bridge_port_group *group;
2188 struct br_ip_list *entry;
2189 int count = 0;
2190
2191 rcu_read_lock();
2192 if (!br_ip_list || !br_port_exists(dev))
2193 goto unlock;
2194
2195 port = br_port_get_rcu(dev);
2196 if (!port || !port->br)
2197 goto unlock;
2198
2199 br = port->br;
2200
2201 list_for_each_entry_rcu(port, &br->port_list, list) {
2202 if (!port->dev || port->dev == dev)
2203 continue;
2204
2205 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
2206 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
2207 if (!entry)
2208 goto unlock;
2209
2210 entry->addr = group->addr;
2211 list_add(&entry->list, br_ip_list);
2212 count++;
2213 }
2214 }
2215
2216unlock:
2217 rcu_read_unlock();
2218 return count;
2219}
2220EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2cd41431 2221
c34963e2
LL		 2222/**
2223 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
2224 * @dev: The bridge port providing the bridge on which to check for a querier
2225 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2226 *
2227 * Checks whether the given interface has a bridge on top and if so returns
2228 * true if a valid querier exists anywhere on the bridged link layer.
2229 * Otherwise returns false.
2230 */
2231bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
2232{
2233 struct net_bridge *br;
2234 struct net_bridge_port *port;
2235 struct ethhdr eth;
2236 bool ret = false;
2237
2238 rcu_read_lock();
2239 if (!br_port_exists(dev))
2240 goto unlock;
2241
2242 port = br_port_get_rcu(dev);
2243 if (!port || !port->br)
2244 goto unlock;
2245
2246 br = port->br;
2247
2248 memset(&eth, 0, sizeof(eth));
2249 eth.h_proto = htons(proto);
2250
2251 ret = br_multicast_querier_exists(br, &eth);
2252
2253unlock:
2254 rcu_read_unlock();
2255 return ret;
2256}
2257EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
2258
2cd41431
LL		 2259/**
2260 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
2261 * @dev: The bridge port adjacent to which to check for a querier
2262 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2263 *
2264 * Checks whether the given interface has a bridge on top and if so returns
2265 * true if a selected querier is behind one of the other ports of this
2266 * bridge. Otherwise returns false.
2267 */
2268bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
2269{
2270 struct net_bridge *br;
2271 struct net_bridge_port *port;
2272 bool ret = false;
2273
2274 rcu_read_lock();
2275 if (!br_port_exists(dev))
2276 goto unlock;
2277
2278 port = br_port_get_rcu(dev);
2279 if (!port || !port->br)
2280 goto unlock;
2281
2282 br = port->br;
2283
2284 switch (proto) {
2285 case ETH_P_IP:
2286 if (!timer_pending(&br->ip4_other_query.timer) ||
2287 rcu_dereference(br->ip4_querier.port) == port)
2288 goto unlock;
2289 break;
3993c4e1 2290#if IS_ENABLED(CONFIG_IPV6)
2cd41431
LL		 2291 case ETH_P_IPV6:
2292 if (!timer_pending(&br->ip6_other_query.timer) ||
2293 rcu_dereference(br->ip6_querier.port) == port)
2294 goto unlock;
2295 break;
3993c4e1 2296#endif
2cd41431
LL		 2297 default:
2298 goto unlock;
2299 }
2300
2301 ret = true;
2302unlock:
2303 rcu_read_unlock();
2304 return ret;
2305}
2306EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
1080ab95
NA		 2307
2308static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 2309 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2310{
2311 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 2312 __be16 proto = skb->protocol;
2313 unsigned int t_len;
1080ab95
NA		 2314
2315 u64_stats_update_begin(&pstats->syncp);
2316 switch (proto) {
2317 case htons(ETH_P_IP):
a65056ec 2318 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 2319 switch (type) {
2320 case IGMP_HOST_MEMBERSHIP_REPORT:
2321 pstats->mstats.igmp_v1reports[dir]++;
2322 break;
2323 case IGMPV2_HOST_MEMBERSHIP_REPORT:
2324 pstats->mstats.igmp_v2reports[dir]++;
2325 break;
2326 case IGMPV3_HOST_MEMBERSHIP_REPORT:
2327 pstats->mstats.igmp_v3reports[dir]++;
2328 break;
2329 case IGMP_HOST_MEMBERSHIP_QUERY:
a65056ec
NA		 2330 if (t_len != sizeof(struct igmphdr)) {
2331 pstats->mstats.igmp_v3queries[dir]++;
2332 } else {
2333 unsigned int offset = skb_transport_offset(skb);
2334 struct igmphdr *ih, _ihdr;
2335
2336 ih = skb_header_pointer(skb, offset,
2337 sizeof(_ihdr), &_ihdr);
2338 if (!ih)
2339 break;
2340 if (!ih->code)
2341 pstats->mstats.igmp_v1queries[dir]++;
2342 else
2343 pstats->mstats.igmp_v2queries[dir]++;
2344 }
1080ab95
NA		 2345 break;
2346 case IGMP_HOST_LEAVE_MESSAGE:
2347 pstats->mstats.igmp_leaves[dir]++;
2348 break;
2349 }
2350 break;
2351#if IS_ENABLED(CONFIG_IPV6)
2352 case htons(ETH_P_IPV6):
a65056ec
NA		 2353 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
2354 sizeof(struct ipv6hdr);
2355 t_len -= skb_network_header_len(skb);
1080ab95
NA		 2356 switch (type) {
2357 case ICMPV6_MGM_REPORT:
2358 pstats->mstats.mld_v1reports[dir]++;
2359 break;
2360 case ICMPV6_MLD2_REPORT:
2361 pstats->mstats.mld_v2reports[dir]++;
2362 break;
2363 case ICMPV6_MGM_QUERY:
a65056ec
NA		 2364 if (t_len != sizeof(struct mld_msg))
2365 pstats->mstats.mld_v2queries[dir]++;
2366 else
2367 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 2368 break;
2369 case ICMPV6_MGM_REDUCTION:
2370 pstats->mstats.mld_leaves[dir]++;
2371 break;
2372 }
2373 break;
2374#endif /* CONFIG_IPV6 */
2375 }
2376 u64_stats_update_end(&pstats->syncp);
2377}
2378
2379void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
a65056ec 2380 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2381{
2382 struct bridge_mcast_stats __percpu *stats;
2383
2384 /* if multicast_disabled is true then igmp type can't be set */
675779ad 2385 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 2386 return;
2387
2388 if (p)
2389 stats = p->mcast_stats;
2390 else
2391 stats = br->mcast_stats;
2392 if (WARN_ON(!stats))
2393 return;
2394
a65056ec 2395 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 2396}
2397
2398int br_multicast_init_stats(struct net_bridge *br)
2399{
2400 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2401 if (!br->mcast_stats)
2402 return -ENOMEM;
2403
2404 return 0;
2405}
2406
b6fe0440
IS		 2407void br_multicast_uninit_stats(struct net_bridge *br)
2408{
2409 free_percpu(br->mcast_stats);
2410}
2411
1080ab95
NA		 2412static void mcast_stats_add_dir(u64 *dst, u64 *src)
2413{
2414 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
2415 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
2416}
2417
2418void br_multicast_get_stats(const struct net_bridge *br,
2419 const struct net_bridge_port *p,
2420 struct br_mcast_stats *dest)
2421{
2422 struct bridge_mcast_stats __percpu *stats;
2423 struct br_mcast_stats tdst;
2424 int i;
2425
2426 memset(dest, 0, sizeof(*dest));
2427 if (p)
2428 stats = p->mcast_stats;
2429 else
2430 stats = br->mcast_stats;
2431 if (WARN_ON(!stats))
2432 return;
2433
2434 memset(&tdst, 0, sizeof(tdst));
2435 for_each_possible_cpu(i) {
2436 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
2437 struct br_mcast_stats temp;
2438 unsigned int start;
2439
2440 do {
2441 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
2442 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
2443 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
2444
a65056ec
NA		 2445 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
2446 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
2447 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
1080ab95
NA		 2448 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
2449 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
2450 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
2451 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
2452 tdst.igmp_parse_errors += temp.igmp_parse_errors;
2453
a65056ec
NA		 2454 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
2455 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 2456 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
2457 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
2458 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
2459 tdst.mld_parse_errors += temp.mld_parse_errors;
2460 }
2461 memcpy(dest, &tdst, sizeof(*dest));
2462}
19e3a9c9
NA		 2463
2464int br_mdb_hash_init(struct net_bridge *br)
2465{
2466 return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
2467}
2468
2469void br_mdb_hash_fini(struct net_bridge *br)
2470{
2471 rhashtable_destroy(&br->mdb_hash_tbl);
2472}
Linux 6.x block layer and io_uring tree(s)