]> git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blame - net/bridge/br_multicast.c
projects / mirror_ubuntu-hirsute-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
rhashtable: use bit_spin_locks to protect hash bucket.
[mirror_ubuntu-hirsute-kernel.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,
19e3a9c9
NA		 47};
48
cc0fdd80 49static void br_multicast_start_querier(struct net_bridge *br,
90010b36 50 struct bridge_mcast_own_query *query);
754bc547
SA		 51static void br_multicast_add_router(struct net_bridge *br,
52 struct net_bridge_port *port);
bc8c20ac
SA		 53static void br_ip4_multicast_leave_group(struct net_bridge *br,
54 struct net_bridge_port *port,
55 __be32 group,
6db6f0ea
FF		 56 __u16 vid,
57 const unsigned char *src);
58
f12e7d95 59static void __del_port_router(struct net_bridge_port *p);
bc8c20ac
SA		 60#if IS_ENABLED(CONFIG_IPV6)
61static void br_ip6_multicast_leave_group(struct net_bridge *br,
62 struct net_bridge_port *port,
63 const struct in6_addr *group,
6db6f0ea 64 __u16 vid, const unsigned char *src);
bc8c20ac 65#endif
c83b8fab 66
19e3a9c9
NA		 67static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
68 struct br_ip *dst)
08b202b6 69{
19e3a9c9 70 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 71}
08b202b6 72
19e3a9c9
NA		 73struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
74 struct br_ip *dst)
eb1d1641 75{
19e3a9c9 76 struct net_bridge_mdb_entry *ent;
eb1d1641 77
19e3a9c9 78 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 79
19e3a9c9
NA		 80 rcu_read_lock();
81 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
82 rcu_read_unlock();
7f285fa7 83
19e3a9c9 84 return ent;
7f285fa7
HX		 85}
86
19e3a9c9
NA		 87static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
88 __be32 dst, __u16 vid)
eb1d1641 89{
8ef2a9a5
YH		 90 struct br_ip br_dst;
91
19e3a9c9 92 memset(&br_dst, 0, sizeof(br_dst));
8ef2a9a5
YH		 93 br_dst.u.ip4 = dst;
94 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 95 br_dst.vid = vid;
0821ec55 96
19e3a9c9 97 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 98}
99
dfd56b8b 100#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 101static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
102 const struct in6_addr *dst,
103 __u16 vid)
08b202b6
YH		 104{
105 struct br_ip br_dst;
0821ec55 106
19e3a9c9 107 memset(&br_dst, 0, sizeof(br_dst));
4e3fd7a0 108 br_dst.u.ip6 = *dst;
08b202b6 109 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 110 br_dst.vid = vid;
08b202b6 111
19e3a9c9 112 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 113}
114#endif
115
eb1d1641 116struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 117 struct sk_buff *skb, u16 vid)
eb1d1641 118{
8ef2a9a5
YH		 119 struct br_ip ip;
120
13cefad2 121 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 122 return NULL;
123
8ef2a9a5 124 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 125 return NULL;
126
19e3a9c9 127 memset(&ip, 0, sizeof(ip));
8ef2a9a5 128 ip.proto = skb->protocol;
fbca58a2 129 ip.vid = vid;
8ef2a9a5 130
eb1d1641
HX		 131 switch (skb->protocol) {
132 case htons(ETH_P_IP):
8ef2a9a5
YH		 133 ip.u.ip4 = ip_hdr(skb)->daddr;
134 break;
dfd56b8b 135#if IS_ENABLED(CONFIG_IPV6)
08b202b6 136 case htons(ETH_P_IPV6):
4e3fd7a0 137 ip.u.ip6 = ipv6_hdr(skb)->daddr;
08b202b6
YH		 138 break;
139#endif
8ef2a9a5
YH		 140 default:
141 return NULL;
eb1d1641
HX		 142 }
143
19e3a9c9 144 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 145}
146
88c1f37f 147static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 148{
88c1f37f 149 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 150 struct net_bridge *br = mp->br;
eb1d1641
HX		 151
152 spin_lock(&br->multicast_lock);
153 if (!netif_running(br->dev) || timer_pending(&mp->timer))
154 goto out;
155
ff0fd34e 156 mp->host_joined = false;
2a26028d 157 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0);
eb1d1641
HX		 158
159 if (mp->ports)
160 goto out;
161
19e3a9c9
NA		 162 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
163 br_mdb_rht_params);
164 hlist_del_rcu(&mp->mdb_node);
eb1d1641 165
4329596c 166 kfree_rcu(mp, rcu);
eb1d1641
HX		 167
168out:
169 spin_unlock(&br->multicast_lock);
170}
171
172static void br_multicast_del_pg(struct net_bridge *br,
173 struct net_bridge_port_group *pg)
174{
eb1d1641
HX		 175 struct net_bridge_mdb_entry *mp;
176 struct net_bridge_port_group *p;
e8051688
ED		 177 struct net_bridge_port_group __rcu **pp;
178
19e3a9c9 179 mp = br_mdb_ip_get(br, &pg->addr);
eb1d1641
HX		 180 if (WARN_ON(!mp))
181 return;
182
e8051688
ED		 183 for (pp = &mp->ports;
184 (p = mlock_dereference(*pp, br)) != NULL;
185 pp = &p->next) {
eb1d1641
HX		 186 if (p != pg)
187 continue;
188
83f6a740 189 rcu_assign_pointer(*pp, p->next);
eb1d1641
HX		 190 hlist_del_init(&p->mglist);
191 del_timer(&p->timer);
45ebcce5
ER		 192 br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB,
193 p->flags);
4329596c 194 kfree_rcu(p, rcu);
eb1d1641 195
ff0fd34e 196 if (!mp->ports && !mp->host_joined &&
eb1d1641
HX		 197 netif_running(br->dev))
198 mod_timer(&mp->timer, jiffies);
199
200 return;
201 }
202
203 WARN_ON(1);
204}
205
88c1f37f 206static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 207{
88c1f37f 208 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
eb1d1641
HX		 209 struct net_bridge *br = pg->port->br;
210
211 spin_lock(&br->multicast_lock);
212 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 213 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 214 goto out;
215
216 br_multicast_del_pg(br, pg);
217
218out:
219 spin_unlock(&br->multicast_lock);
220}
221
8ef2a9a5 222static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 223 __be32 group,
224 u8 *igmp_type)
eb1d1641 225{
5e923585
NA		 226 struct igmpv3_query *ihv3;
227 size_t igmp_hdr_size;
eb1d1641
HX		 228 struct sk_buff *skb;
229 struct igmphdr *ih;
230 struct ethhdr *eth;
231 struct iphdr *iph;
232
5e923585
NA		 233 igmp_hdr_size = sizeof(*ih);
234 if (br->multicast_igmp_version == 3)
235 igmp_hdr_size = sizeof(*ihv3);
eb1d1641 236 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
5e923585 237 igmp_hdr_size + 4);
eb1d1641
HX		 238 if (!skb)
239 goto out;
240
241 skb->protocol = htons(ETH_P_IP);
242
243 skb_reset_mac_header(skb);
244 eth = eth_hdr(skb);
245
e5a727f6 246 ether_addr_copy(eth->h_source, br->dev->dev_addr);
eb1d1641
HX		 247 eth->h_dest[0] = 1;
248 eth->h_dest[1] = 0;
249 eth->h_dest[2] = 0x5e;
250 eth->h_dest[3] = 0;
251 eth->h_dest[4] = 0;
252 eth->h_dest[5] = 1;
253 eth->h_proto = htons(ETH_P_IP);
254 skb_put(skb, sizeof(*eth));
255
256 skb_set_network_header(skb, skb->len);
257 iph = ip_hdr(skb);
258
259 iph->version = 4;
260 iph->ihl = 6;
261 iph->tos = 0xc0;
5e923585 262 iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4);
eb1d1641
HX		 263 iph->id = 0;
264 iph->frag_off = htons(IP_DF);
265 iph->ttl = 1;
266 iph->protocol = IPPROTO_IGMP;
675779ad 267 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
1c8ad5bf 268 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
eb1d1641
HX		 269 iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
270 ((u8 *)&iph[1])[0] = IPOPT_RA;
271 ((u8 *)&iph[1])[1] = 4;
272 ((u8 *)&iph[1])[2] = 0;
273 ((u8 *)&iph[1])[3] = 0;
274 ip_send_check(iph);
275 skb_put(skb, 24);
276
277 skb_set_transport_header(skb, skb->len);
1080ab95 278 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 279
5e923585
NA		 280 switch (br->multicast_igmp_version) {
281 case 2:
282 ih = igmp_hdr(skb);
283 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
284 ih->code = (group ? br->multicast_last_member_interval :
285 br->multicast_query_response_interval) /
286 (HZ / IGMP_TIMER_SCALE);
287 ih->group = group;
288 ih->csum = 0;
289 ih->csum = ip_compute_csum((void *)ih, sizeof(*ih));
290 break;
291 case 3:
292 ihv3 = igmpv3_query_hdr(skb);
293 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
294 ihv3->code = (group ? br->multicast_last_member_interval :
295 br->multicast_query_response_interval) /
296 (HZ / IGMP_TIMER_SCALE);
297 ihv3->group = group;
298 ihv3->qqic = br->multicast_query_interval / HZ;
299 ihv3->nsrcs = 0;
300 ihv3->resv = 0;
301 ihv3->suppress = 0;
302 ihv3->qrv = 2;
303 ihv3->csum = 0;
304 ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3));
305 break;
306 }
307
308 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 309 __skb_pull(skb, sizeof(*eth));
310
311out:
312 return skb;
313}
314
dfd56b8b 315#if IS_ENABLED(CONFIG_IPV6)
08b202b6 316static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 317 const struct in6_addr *grp,
318 u8 *igmp_type)
08b202b6 319{
aa2ae3e7
NA		 320 struct mld2_query *mld2q;
321 unsigned long interval;
08b202b6
YH		 322 struct ipv6hdr *ip6h;
323 struct mld_msg *mldq;
aa2ae3e7
NA		 324 size_t mld_hdr_size;
325 struct sk_buff *skb;
08b202b6
YH		 326 struct ethhdr *eth;
327 u8 *hopopt;
08b202b6 328
aa2ae3e7
NA		 329 mld_hdr_size = sizeof(*mldq);
330 if (br->multicast_mld_version == 2)
331 mld_hdr_size = sizeof(*mld2q);
08b202b6 332 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
aa2ae3e7 333 8 + mld_hdr_size);
08b202b6
YH		 334 if (!skb)
335 goto out;
336
337 skb->protocol = htons(ETH_P_IPV6);
338
339 /* Ethernet header */
340 skb_reset_mac_header(skb);
341 eth = eth_hdr(skb);
342
e5a727f6 343 ether_addr_copy(eth->h_source, br->dev->dev_addr);
08b202b6
YH		 344 eth->h_proto = htons(ETH_P_IPV6);
345 skb_put(skb, sizeof(*eth));
346
347 /* IPv6 header + HbH option */
348 skb_set_network_header(skb, skb->len);
349 ip6h = ipv6_hdr(skb);
350
351 *(__force __be32 *)ip6h = htonl(0x60000000);
aa2ae3e7 352 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 353 ip6h->nexthdr = IPPROTO_HOPOPTS;
354 ip6h->hop_limit = 1;
a7bff75b 355 ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
d1d81d4c
UW		 356 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
357 &ip6h->saddr)) {
358 kfree_skb(skb);
675779ad 359 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 360 return NULL;
361 }
0888d5f3 362
675779ad 363 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 364 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 365
366 hopopt = (u8 *)(ip6h + 1);
367 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
368 hopopt[1] = 0; /* length of HbH */
369 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
370 hopopt[3] = 2; /* Length of RA Option */
371 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
372 hopopt[5] = 0;
1de5a71c
EZ		 373 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
374 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 375
376 skb_put(skb, sizeof(*ip6h) + 8);
377
378 /* ICMPv6 */
379 skb_set_transport_header(skb, skb->len);
1080ab95 380 interval = ipv6_addr_any(grp) ?
32de868c
LL		 381 br->multicast_query_response_interval :
382 br->multicast_last_member_interval;
1080ab95 383 *igmp_type = ICMPV6_MGM_QUERY;
aa2ae3e7
NA		 384 switch (br->multicast_mld_version) {
385 case 1:
386 mldq = (struct mld_msg *)icmp6_hdr(skb);
387 mldq->mld_type = ICMPV6_MGM_QUERY;
388 mldq->mld_code = 0;
389 mldq->mld_cksum = 0;
390 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
391 mldq->mld_reserved = 0;
392 mldq->mld_mca = *grp;
393 mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
394 sizeof(*mldq), IPPROTO_ICMPV6,
395 csum_partial(mldq,
396 sizeof(*mldq),
397 0));
398 break;
399 case 2:
400 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 401 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 402 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
403 mld2q->mld2q_code = 0;
404 mld2q->mld2q_cksum = 0;
405 mld2q->mld2q_resv1 = 0;
406 mld2q->mld2q_resv2 = 0;
407 mld2q->mld2q_suppress = 0;
408 mld2q->mld2q_qrv = 2;
409 mld2q->mld2q_nsrcs = 0;
410 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
411 mld2q->mld2q_mca = *grp;
412 mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
413 sizeof(*mld2q),
414 IPPROTO_ICMPV6,
415 csum_partial(mld2q,
416 sizeof(*mld2q),
417 0));
418 break;
419 }
420 skb_put(skb, mld_hdr_size);
08b202b6
YH		 421
422 __skb_pull(skb, sizeof(*eth));
423
424out:
425 return skb;
426}
427#endif
428
8ef2a9a5 429static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 430 struct br_ip *addr,
431 u8 *igmp_type)
8ef2a9a5
YH		 432{
433 switch (addr->proto) {
434 case htons(ETH_P_IP):
1080ab95 435 return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type);
dfd56b8b 436#if IS_ENABLED(CONFIG_IPV6)
08b202b6 437 case htons(ETH_P_IPV6):
1080ab95
NA		 438 return br_ip6_multicast_alloc_query(br, &addr->u.ip6,
439 igmp_type);
08b202b6 440#endif
8ef2a9a5
YH		 441 }
442 return NULL;
443}
444
cfd56754 445struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 446 struct br_ip *group)
eb1d1641 447{
eb1d1641 448 struct net_bridge_mdb_entry *mp;
4c0833bc 449 int err;
eb1d1641 450
19e3a9c9
NA		 451 mp = br_mdb_ip_get(br, group);
452 if (mp)
453 return mp;
eb1d1641 454
19e3a9c9
NA		 455 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
456 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
457 return ERR_PTR(-E2BIG);
eb1d1641
HX		 458 }
459
460 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
461 if (unlikely(!mp))
4c0833bc 462 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 463
464 mp->br = br;
8ef2a9a5 465 mp->addr = *group;
88c1f37f 466 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 467 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
468 br_mdb_rht_params);
469 if (err) {
470 kfree(mp);
471 mp = ERR_PTR(err);
472 } else {
473 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
474 }
1faabf2a 475
eb1d1641
HX		 476 return mp;
477}
478
cfd56754
CW		 479struct net_bridge_port_group *br_multicast_new_port_group(
480 struct net_bridge_port *port,
481 struct br_ip *group,
ccb1c31a 482 struct net_bridge_port_group __rcu *next,
6db6f0ea
FF		 483 unsigned char flags,
484 const unsigned char *src)
cfd56754
CW		 485{
486 struct net_bridge_port_group *p;
487
488 p = kzalloc(sizeof(*p), GFP_ATOMIC);
489 if (unlikely(!p))
490 return NULL;
491
492 p->addr = *group;
493 p->port = port;
9d06b6d8 494 p->flags = flags;
eca2a43b 495 rcu_assign_pointer(p->next, next);
cfd56754 496 hlist_add_head(&p->mglist, &port->mglist);
88c1f37f 497 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
6db6f0ea
FF		 498
499 if (src)
500 memcpy(p->eth_addr, src, ETH_ALEN);
501 else
1bfe45f4 502 eth_broadcast_addr(p->eth_addr);
6db6f0ea 503
cfd56754
CW		 504 return p;
505}
506
6db6f0ea
FF		 507static bool br_port_group_equal(struct net_bridge_port_group *p,
508 struct net_bridge_port *port,
509 const unsigned char *src)
510{
511 if (p->port != port)
512 return false;
513
514 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
515 return true;
516
517 return ether_addr_equal(src, p->eth_addr);
518}
519
eb1d1641 520static int br_multicast_add_group(struct net_bridge *br,
8ef2a9a5 521 struct net_bridge_port *port,
6db6f0ea
FF		 522 struct br_ip *group,
523 const unsigned char *src)
eb1d1641 524{
e8051688 525 struct net_bridge_port_group __rcu **pp;
5e923585
NA		 526 struct net_bridge_port_group *p;
527 struct net_bridge_mdb_entry *mp;
454594f3 528 unsigned long now = jiffies;
eb1d1641
HX		 529 int err;
530
eb1d1641
HX		 531 spin_lock(&br->multicast_lock);
532 if (!netif_running(br->dev) ||
533 (port && port->state == BR_STATE_DISABLED))
534 goto out;
535
19e3a9c9 536 mp = br_multicast_new_group(br, group);
eb1d1641 537 err = PTR_ERR(mp);
4c0833bc 538 if (IS_ERR(mp))
eb1d1641
HX		 539 goto err;
540
541 if (!port) {
2a26028d
AL		 542 if (!mp->host_joined) {
543 mp->host_joined = true;
544 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0);
545 }
454594f3 546 mod_timer(&mp->timer, now + br->multicast_membership_interval);
eb1d1641
HX		 547 goto out;
548 }
549
e8051688
ED		 550 for (pp = &mp->ports;
551 (p = mlock_dereference(*pp, br)) != NULL;
552 pp = &p->next) {
6db6f0ea 553 if (br_port_group_equal(p, port, src))
454594f3 554 goto found;
eb1d1641
HX		 555 if ((unsigned long)p->port < (unsigned long)port)
556 break;
557 }
558
6db6f0ea 559 p = br_multicast_new_port_group(port, group, *pp, 0, src);
eb1d1641
HX		 560 if (unlikely(!p))
561 goto err;
eb1d1641 562 rcu_assign_pointer(*pp, p);
45ebcce5 563 br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0);
eb1d1641 564
454594f3
LL		 565found:
566 mod_timer(&p->timer, now + br->multicast_membership_interval);
eb1d1641
HX		 567out:
568 err = 0;
569
570err:
571 spin_unlock(&br->multicast_lock);
572 return err;
573}
574
8ef2a9a5
YH		 575static int br_ip4_multicast_add_group(struct net_bridge *br,
576 struct net_bridge_port *port,
b0e9a30d 577 __be32 group,
6db6f0ea
FF		 578 __u16 vid,
579 const unsigned char *src)
8ef2a9a5
YH		 580{
581 struct br_ip br_group;
582
583 if (ipv4_is_local_multicast(group))
584 return 0;
585
1515a63f 586 memset(&br_group, 0, sizeof(br_group));
8ef2a9a5
YH		 587 br_group.u.ip4 = group;
588 br_group.proto = htons(ETH_P_IP);
b0e9a30d 589 br_group.vid = vid;
8ef2a9a5 590
6db6f0ea 591 return br_multicast_add_group(br, port, &br_group, src);
8ef2a9a5
YH		 592}
593
dfd56b8b 594#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 595static int br_ip6_multicast_add_group(struct net_bridge *br,
596 struct net_bridge_port *port,
b0e9a30d 597 const struct in6_addr *group,
6db6f0ea
FF		 598 __u16 vid,
599 const unsigned char *src)
08b202b6
YH		 600{
601 struct br_ip br_group;
602
3c3769e6 603 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 604 return 0;
605
19e3a9c9 606 memset(&br_group, 0, sizeof(br_group));
4e3fd7a0 607 br_group.u.ip6 = *group;
9cc6e0c4 608 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 609 br_group.vid = vid;
08b202b6 610
6db6f0ea 611 return br_multicast_add_group(br, port, &br_group, src);
08b202b6
YH		 612}
613#endif
614
88c1f37f 615static void br_multicast_router_expired(struct timer_list *t)
eb1d1641 616{
88c1f37f
AP		 617 struct net_bridge_port *port =
618 from_timer(port, t, multicast_router_timer);
eb1d1641
HX		 619 struct net_bridge *br = port->br;
620
621 spin_lock(&br->multicast_lock);
a55d8246
NA		 622 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
623 port->multicast_router == MDB_RTR_TYPE_PERM ||
f12e7d95 624 timer_pending(&port->multicast_router_timer))
eb1d1641
HX		 625 goto out;
626
f12e7d95 627 __del_port_router(port);
eb1d1641
HX		 628out:
629 spin_unlock(&br->multicast_lock);
630}
631
77041420
YG		 632static void br_mc_router_state_change(struct net_bridge *p,
633 bool is_mc_router)
634{
635 struct switchdev_attr attr = {
636 .orig_dev = p->dev,
637 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
638 .flags = SWITCHDEV_F_DEFER,
639 .u.mrouter = is_mc_router,
640 };
641
642 switchdev_port_attr_set(p->dev, &attr);
643}
644
88c1f37f 645static void br_multicast_local_router_expired(struct timer_list *t)
eb1d1641 646{
88c1f37f 647 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
77041420
YG		 648
649 spin_lock(&br->multicast_lock);
650 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
651 br->multicast_router == MDB_RTR_TYPE_PERM ||
652 timer_pending(&br->multicast_router_timer))
653 goto out;
654
655 br_mc_router_state_change(br, false);
656out:
657 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 658}
659
cc0fdd80 660static void br_multicast_querier_expired(struct net_bridge *br,
90010b36 661 struct bridge_mcast_own_query *query)
c83b8fab 662{
c83b8fab 663 spin_lock(&br->multicast_lock);
13cefad2 664 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 665 goto out;
666
cc0fdd80 667 br_multicast_start_querier(br, query);
c83b8fab
HX		 668
669out:
670 spin_unlock(&br->multicast_lock);
671}
672
88c1f37f 673static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 674{
88c1f37f 675 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
cc0fdd80 676
90010b36 677 br_multicast_querier_expired(br, &br->ip4_own_query);
cc0fdd80
LL		 678}
679
680#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 681static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 682{
88c1f37f 683 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
cc0fdd80 684
90010b36 685 br_multicast_querier_expired(br, &br->ip6_own_query);
cc0fdd80
LL		 686}
687#endif
688
dc4eb53a
LL		 689static void br_multicast_select_own_querier(struct net_bridge *br,
690 struct br_ip *ip,
691 struct sk_buff *skb)
692{
693 if (ip->proto == htons(ETH_P_IP))
694 br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr;
695#if IS_ENABLED(CONFIG_IPV6)
696 else
697 br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr;
698#endif
699}
700
8ef2a9a5
YH		 701static void __br_multicast_send_query(struct net_bridge *br,
702 struct net_bridge_port *port,
703 struct br_ip *ip)
eb1d1641 704{
eb1d1641 705 struct sk_buff *skb;
1080ab95 706 u8 igmp_type;
eb1d1641 707
1080ab95 708 skb = br_multicast_alloc_query(br, ip, &igmp_type);
eb1d1641 709 if (!skb)
8ef2a9a5 710 return;
eb1d1641
HX		 711
712 if (port) {
eb1d1641 713 skb->dev = port->dev;
a65056ec 714 br_multicast_count(br, port, skb, igmp_type,
1080ab95 715 BR_MCAST_DIR_TX);
29a26a56
EB		 716 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
717 dev_net(port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 718 br_dev_queue_push_xmit);
dc4eb53a
LL		 719 } else {
720 br_multicast_select_own_querier(br, ip, skb);
a65056ec 721 br_multicast_count(br, port, skb, igmp_type,
1080ab95 722 BR_MCAST_DIR_RX);
eb1d1641 723 netif_rx(skb);
dc4eb53a 724 }
8ef2a9a5
YH		 725}
726
727static void br_multicast_send_query(struct net_bridge *br,
cc0fdd80 728 struct net_bridge_port *port,
90010b36 729 struct bridge_mcast_own_query *own_query)
8ef2a9a5 730{
90010b36 731 struct bridge_mcast_other_query *other_query = NULL;
5e923585
NA		 732 struct br_ip br_group;
733 unsigned long time;
8ef2a9a5 734
13cefad2
NA		 735 if (!netif_running(br->dev) ||
736 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
675779ad 737 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
8ef2a9a5
YH		 738 return;
739
08b202b6
YH		 740 memset(&br_group.u, 0, sizeof(br_group.u));
741
90010b36
LL		 742 if (port ? (own_query == &port->ip4_own_query) :
743 (own_query == &br->ip4_own_query)) {
744 other_query = &br->ip4_other_query;
cc0fdd80 745 br_group.proto = htons(ETH_P_IP);
dfd56b8b 746#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 747 } else {
90010b36 748 other_query = &br->ip6_other_query;
cc0fdd80 749 br_group.proto = htons(ETH_P_IPV6);
08b202b6 750#endif
cc0fdd80
LL		 751 }
752
90010b36 753 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 754 return;
755
756 __br_multicast_send_query(br, port, &br_group);
eb1d1641 757
eb1d1641 758 time = jiffies;
90010b36 759 time += own_query->startup_sent < br->multicast_startup_query_count ?
eb1d1641
HX		 760 br->multicast_startup_query_interval :
761 br->multicast_query_interval;
90010b36 762 mod_timer(&own_query->timer, time);
eb1d1641
HX		 763}
764
90010b36
LL		 765static void
766br_multicast_port_query_expired(struct net_bridge_port *port,
767 struct bridge_mcast_own_query *query)
eb1d1641 768{
eb1d1641
HX		 769 struct net_bridge *br = port->br;
770
771 spin_lock(&br->multicast_lock);
02a780c0
DC		 772 if (port->state == BR_STATE_DISABLED ||
773 port->state == BR_STATE_BLOCKING)
eb1d1641
HX		 774 goto out;
775
cc0fdd80
LL		 776 if (query->startup_sent < br->multicast_startup_query_count)
777 query->startup_sent++;
eb1d1641 778
cc0fdd80 779 br_multicast_send_query(port->br, port, query);
eb1d1641
HX		 780
781out:
782 spin_unlock(&br->multicast_lock);
783}
784
88c1f37f 785static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 786{
88c1f37f 787 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
cc0fdd80 788
90010b36 789 br_multicast_port_query_expired(port, &port->ip4_own_query);
cc0fdd80
LL		 790}
791
792#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 793static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 794{
88c1f37f 795 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
cc0fdd80 796
90010b36 797 br_multicast_port_query_expired(port, &port->ip6_own_query);
cc0fdd80
LL		 798}
799#endif
800
147c1e9b
NF		 801static void br_mc_disabled_update(struct net_device *dev, bool value)
802{
803 struct switchdev_attr attr = {
804 .orig_dev = dev,
805 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
806 .flags = SWITCHDEV_F_DEFER,
13cefad2 807 .u.mc_disabled = !value,
147c1e9b
NF		 808 };
809
810 switchdev_port_attr_set(dev, &attr);
811}
812
1080ab95 813int br_multicast_add_port(struct net_bridge_port *port)
eb1d1641 814{
7f0aec7a 815 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641 816
88c1f37f
AP		 817 timer_setup(&port->multicast_router_timer,
818 br_multicast_router_expired, 0);
819 timer_setup(&port->ip4_own_query.timer,
820 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 821#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 822 timer_setup(&port->ip6_own_query.timer,
823 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 824#endif
13cefad2
NA		 825 br_mc_disabled_update(port->dev,
826 br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
147c1e9b 827
1080ab95
NA		 828 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
829 if (!port->mcast_stats)
830 return -ENOMEM;
831
832 return 0;
eb1d1641
HX		 833}
834
835void br_multicast_del_port(struct net_bridge_port *port)
836{
e10177ab
SA		 837 struct net_bridge *br = port->br;
838 struct net_bridge_port_group *pg;
839 struct hlist_node *n;
840
841 /* Take care of the remaining groups, only perm ones should be left */
842 spin_lock_bh(&br->multicast_lock);
843 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
844 br_multicast_del_pg(br, pg);
845 spin_unlock_bh(&br->multicast_lock);
eb1d1641 846 del_timer_sync(&port->multicast_router_timer);
1080ab95 847 free_percpu(port->mcast_stats);
eb1d1641
HX		 848}
849
90010b36 850static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 851{
cc0fdd80 852 query->startup_sent = 0;
561f1103 853
cc0fdd80
LL		 854 if (try_to_del_timer_sync(&query->timer) >= 0 ||
855 del_timer(&query->timer))
856 mod_timer(&query->timer, jiffies);
561f1103
HX		 857}
858
7cb3f921 859static void __br_multicast_enable_port(struct net_bridge_port *port)
eb1d1641
HX		 860{
861 struct net_bridge *br = port->br;
862
13cefad2 863 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
7cb3f921 864 return;
eb1d1641 865
90010b36 866 br_multicast_enable(&port->ip4_own_query);
cc0fdd80 867#if IS_ENABLED(CONFIG_IPV6)
90010b36 868 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 869#endif
7f0aec7a
NA		 870 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
871 hlist_unhashed(&port->rlist))
754bc547 872 br_multicast_add_router(br, port);
7cb3f921 873}
eb1d1641 874
7cb3f921
NA		 875void br_multicast_enable_port(struct net_bridge_port *port)
876{
877 struct net_bridge *br = port->br;
878
879 spin_lock(&br->multicast_lock);
880 __br_multicast_enable_port(port);
eb1d1641
HX		 881 spin_unlock(&br->multicast_lock);
882}
883
884void br_multicast_disable_port(struct net_bridge_port *port)
885{
886 struct net_bridge *br = port->br;
887 struct net_bridge_port_group *pg;
b67bfe0d 888 struct hlist_node *n;
eb1d1641
HX		 889
890 spin_lock(&br->multicast_lock);
b67bfe0d 891 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
9d06b6d8 892 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
e10177ab 893 br_multicast_del_pg(br, pg);
eb1d1641 894
f12e7d95
NF		 895 __del_port_router(port);
896
eb1d1641 897 del_timer(&port->multicast_router_timer);
90010b36 898 del_timer(&port->ip4_own_query.timer);
cc0fdd80 899#if IS_ENABLED(CONFIG_IPV6)
90010b36 900 del_timer(&port->ip6_own_query.timer);
cc0fdd80 901#endif
eb1d1641
HX		 902 spin_unlock(&br->multicast_lock);
903}
904
8ef2a9a5
YH		 905static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
906 struct net_bridge_port *port,
06499098
VY		 907 struct sk_buff *skb,
908 u16 vid)
eb1d1641 909{
6db6f0ea 910 const unsigned char *src;
eb1d1641
HX		 911 struct igmpv3_report *ih;
912 struct igmpv3_grec *grec;
913 int i;
914 int len;
915 int num;
916 int type;
917 int err = 0;
918 __be32 group;
919
eb1d1641
HX		 920 ih = igmpv3_report_hdr(skb);
921 num = ntohs(ih->ngrec);
c2d4fbd2 922 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 923
924 for (i = 0; i < num; i++) {
925 len += sizeof(*grec);
ba5ea614 926 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 927 return -EINVAL;
928
fd218cf9 929 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 930 group = grec->grec_mca;
931 type = grec->grec_type;
932
8eabf95c 933 len += ntohs(grec->grec_nsrcs) * 4;
ba5ea614 934 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 935 return -EINVAL;
936
937 /* We treat this as an IGMPv2 report for now. */
938 switch (type) {
939 case IGMPV3_MODE_IS_INCLUDE:
940 case IGMPV3_MODE_IS_EXCLUDE:
941 case IGMPV3_CHANGE_TO_INCLUDE:
942 case IGMPV3_CHANGE_TO_EXCLUDE:
943 case IGMPV3_ALLOW_NEW_SOURCES:
944 case IGMPV3_BLOCK_OLD_SOURCES:
945 break;
946
947 default:
948 continue;
949 }
950
6db6f0ea 951 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 952 if ((type == IGMPV3_CHANGE_TO_INCLUDE ||
953 type == IGMPV3_MODE_IS_INCLUDE) &&
954 ntohs(grec->grec_nsrcs) == 0) {
6db6f0ea 955 br_ip4_multicast_leave_group(br, port, group, vid, src);
bc8c20ac 956 } else {
6db6f0ea
FF		 957 err = br_ip4_multicast_add_group(br, port, group, vid,
958 src);
bc8c20ac
SA		 959 if (err)
960 break;
961 }
eb1d1641
HX		 962 }
963
964 return err;
965}
966
dfd56b8b 967#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 968static int br_ip6_multicast_mld2_report(struct net_bridge *br,
969 struct net_bridge_port *port,
06499098
VY		 970 struct sk_buff *skb,
971 u16 vid)
08b202b6 972{
ba5ea614 973 unsigned int nsrcs_offset;
6db6f0ea 974 const unsigned char *src;
08b202b6
YH		 975 struct icmp6hdr *icmp6h;
976 struct mld2_grec *grec;
ba5ea614 977 unsigned int grec_len;
08b202b6
YH		 978 int i;
979 int len;
980 int num;
981 int err = 0;
982
ba5ea614 983 if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
08b202b6
YH		 984 return -EINVAL;
985
986 icmp6h = icmp6_hdr(skb);
987 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
c2d4fbd2 988 len = skb_transport_offset(skb) + sizeof(*icmp6h);
08b202b6
YH		 989
990 for (i = 0; i < num; i++) {
991 __be16 *nsrcs, _nsrcs;
992
ba5ea614
LL		 993 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
994
995 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
996 nsrcs_offset + sizeof(_nsrcs))
997 return -EINVAL;
998
999 nsrcs = skb_header_pointer(skb, nsrcs_offset,
08b202b6
YH		 1000 sizeof(_nsrcs), &_nsrcs);
1001 if (!nsrcs)
1002 return -EINVAL;
1003
4154b567 1004 grec_len = struct_size(grec, grec_src, ntohs(*nsrcs));
ba5ea614
LL		 1005
1006 if (!ipv6_mc_may_pull(skb, len + grec_len))
08b202b6
YH		 1007 return -EINVAL;
1008
1009 grec = (struct mld2_grec *)(skb->data + len);
ba5ea614 1010 len += grec_len;
08b202b6
YH		 1011
1012 /* We treat these as MLDv1 reports for now. */
1013 switch (grec->grec_type) {
1014 case MLD2_MODE_IS_INCLUDE:
1015 case MLD2_MODE_IS_EXCLUDE:
1016 case MLD2_CHANGE_TO_INCLUDE:
1017 case MLD2_CHANGE_TO_EXCLUDE:
1018 case MLD2_ALLOW_NEW_SOURCES:
1019 case MLD2_BLOCK_OLD_SOURCES:
1020 break;
1021
1022 default:
1023 continue;
1024 }
1025
6db6f0ea 1026 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 1027 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
1028 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
1029 ntohs(*nsrcs) == 0) {
1030 br_ip6_multicast_leave_group(br, port, &grec->grec_mca,
6db6f0ea 1031 vid, src);
bc8c20ac
SA		 1032 } else {
1033 err = br_ip6_multicast_add_group(br, port,
6db6f0ea
FF		 1034 &grec->grec_mca, vid,
1035 src);
9264251e 1036 if (err)
bc8c20ac
SA		 1037 break;
1038 }
08b202b6
YH		 1039 }
1040
1041 return err;
1042}
1043#endif
1044
dc4eb53a 1045static bool br_ip4_multicast_select_querier(struct net_bridge *br,
2cd41431 1046 struct net_bridge_port *port,
dc4eb53a
LL		 1047 __be32 saddr)
1048{
1049 if (!timer_pending(&br->ip4_own_query.timer) &&
1050 !timer_pending(&br->ip4_other_query.timer))
1051 goto update;
1052
1053 if (!br->ip4_querier.addr.u.ip4)
1054 goto update;
1055
1056 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4))
1057 goto update;
1058
1059 return false;
1060
1061update:
1062 br->ip4_querier.addr.u.ip4 = saddr;
1063
2cd41431
LL		 1064 /* update protected by general multicast_lock by caller */
1065 rcu_assign_pointer(br->ip4_querier.port, port);
1066
dc4eb53a
LL		 1067 return true;
1068}
1069
1070#if IS_ENABLED(CONFIG_IPV6)
1071static bool br_ip6_multicast_select_querier(struct net_bridge *br,
2cd41431 1072 struct net_bridge_port *port,
dc4eb53a
LL		 1073 struct in6_addr *saddr)
1074{
1075 if (!timer_pending(&br->ip6_own_query.timer) &&
1076 !timer_pending(&br->ip6_other_query.timer))
1077 goto update;
1078
1079 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0)
1080 goto update;
1081
1082 return false;
1083
1084update:
1085 br->ip6_querier.addr.u.ip6 = *saddr;
1086
2cd41431
LL		 1087 /* update protected by general multicast_lock by caller */
1088 rcu_assign_pointer(br->ip6_querier.port, port);
1089
dc4eb53a
LL		 1090 return true;
1091}
1092#endif
1093
1094static bool br_multicast_select_querier(struct net_bridge *br,
2cd41431 1095 struct net_bridge_port *port,
dc4eb53a
LL		 1096 struct br_ip *saddr)
1097{
1098 switch (saddr->proto) {
1099 case htons(ETH_P_IP):
2cd41431 1100 return br_ip4_multicast_select_querier(br, port, saddr->u.ip4);
dc4eb53a
LL		 1101#if IS_ENABLED(CONFIG_IPV6)
1102 case htons(ETH_P_IPV6):
2cd41431 1103 return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6);
dc4eb53a
LL		 1104#endif
1105 }
1106
1107 return false;
1108}
1109
cc0fdd80 1110static void
90010b36
LL		 1111br_multicast_update_query_timer(struct net_bridge *br,
1112 struct bridge_mcast_other_query *query,
1113 unsigned long max_delay)
b00589af 1114{
90010b36
LL		 1115 if (!timer_pending(&query->timer))
1116 query->delay_time = jiffies + max_delay;
b00589af 1117
90010b36 1118 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
b00589af
LL		 1119}
1120
6d549648
NF		 1121static void br_port_mc_router_state_change(struct net_bridge_port *p,
1122 bool is_mc_router)
1123{
1124 struct switchdev_attr attr = {
1125 .orig_dev = p->dev,
1126 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
1127 .flags = SWITCHDEV_F_DEFER,
1128 .u.mrouter = is_mc_router,
1129 };
1130
1131 switchdev_port_attr_set(p->dev, &attr);
1132}
1133
7e80c124 1134/*
7c77602f 1135 * Add port to router_list
7e80c124 1136 * list is maintained ordered by pointer value
1137 * and locked by br->multicast_lock and RCU
1138 */
0909e117
HX		 1139static void br_multicast_add_router(struct net_bridge *br,
1140 struct net_bridge_port *port)
1141{
dcdca2c4 1142 struct net_bridge_port *p;
b67bfe0d 1143 struct hlist_node *slot = NULL;
dcdca2c4 1144
1a040eac
NA		 1145 if (!hlist_unhashed(&port->rlist))
1146 return;
1147
b67bfe0d 1148 hlist_for_each_entry(p, &br->router_list, rlist) {
7e80c124 1149 if ((unsigned long) port >= (unsigned long) p)
1150 break;
b67bfe0d 1151 slot = &p->rlist;
dcdca2c4 1152 }
1153
7e80c124 1154 if (slot)
1d023284 1155 hlist_add_behind_rcu(&port->rlist, slot);
dcdca2c4 1156 else
1157 hlist_add_head_rcu(&port->rlist, &br->router_list);
949f1e39 1158 br_rtr_notify(br->dev, port, RTM_NEWMDB);
6d549648 1159 br_port_mc_router_state_change(port, true);
0909e117
HX		 1160}
1161
eb1d1641
HX		 1162static void br_multicast_mark_router(struct net_bridge *br,
1163 struct net_bridge_port *port)
1164{
1165 unsigned long now = jiffies;
eb1d1641
HX		 1166
1167 if (!port) {
77041420
YG		 1168 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
1169 if (!timer_pending(&br->multicast_router_timer))
1170 br_mc_router_state_change(br, true);
eb1d1641
HX		 1171 mod_timer(&br->multicast_router_timer,
1172 now + br->multicast_querier_interval);
77041420 1173 }
eb1d1641
HX		 1174 return;
1175 }
1176
a55d8246
NA		 1177 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1178 port->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 1179 return;
1180
0909e117 1181 br_multicast_add_router(br, port);
eb1d1641 1182
eb1d1641
HX		 1183 mod_timer(&port->multicast_router_timer,
1184 now + br->multicast_querier_interval);
1185}
1186
1187static void br_multicast_query_received(struct net_bridge *br,
1188 struct net_bridge_port *port,
90010b36 1189 struct bridge_mcast_other_query *query,
dc4eb53a 1190 struct br_ip *saddr,
b00589af 1191 unsigned long max_delay)
eb1d1641 1192{
2cd41431 1193 if (!br_multicast_select_querier(br, port, saddr))
eb1d1641
HX		 1194 return;
1195
dc4eb53a 1196 br_multicast_update_query_timer(br, query, max_delay);
278e2148 1197 br_multicast_mark_router(br, port);
eb1d1641
HX		 1198}
1199
9c2e955c 1200static void br_ip4_multicast_query(struct net_bridge *br,
1201 struct net_bridge_port *port,
1202 struct sk_buff *skb,
1203 u16 vid)
eb1d1641 1204{
ba5ea614 1205 unsigned int transport_len = ip_transport_len(skb);
b71d1d42 1206 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 1207 struct igmphdr *ih = igmp_hdr(skb);
1208 struct net_bridge_mdb_entry *mp;
1209 struct igmpv3_query *ih3;
1210 struct net_bridge_port_group *p;
e8051688 1211 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1212 struct br_ip saddr;
eb1d1641
HX		 1213 unsigned long max_delay;
1214 unsigned long now = jiffies;
1215 __be32 group;
1216
1217 spin_lock(&br->multicast_lock);
1218 if (!netif_running(br->dev) ||
1219 (port && port->state == BR_STATE_DISABLED))
1220 goto out;
1221
eb1d1641
HX		 1222 group = ih->group;
1223
ba5ea614 1224 if (transport_len == sizeof(*ih)) {
eb1d1641
HX		 1225 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
1226
1227 if (!max_delay) {
1228 max_delay = 10 * HZ;
1229 group = 0;
1230 }
ba5ea614 1231 } else if (transport_len >= sizeof(*ih3)) {
eb1d1641
HX		 1232 ih3 = igmpv3_query_hdr(skb);
1233 if (ih3->nsrcs)
bec68ff1 1234 goto out;
eb1d1641 1235
0ba8c9ec
YH		 1236 max_delay = ih3->code ?
1237 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 1238 } else {
9ed973cc
LL		 1239 goto out;
1240 }
1241
dc4eb53a
LL		 1242 if (!group) {
1243 saddr.proto = htons(ETH_P_IP);
1244 saddr.u.ip4 = iph->saddr;
b00589af 1245
dc4eb53a
LL		 1246 br_multicast_query_received(br, port, &br->ip4_other_query,
1247 &saddr, max_delay);
eb1d1641 1248 goto out;
dc4eb53a 1249 }
eb1d1641 1250
19e3a9c9 1251 mp = br_mdb_ip4_get(br, group, vid);
eb1d1641
HX		 1252 if (!mp)
1253 goto out;
1254
1255 max_delay *= br->multicast_last_member_count;
1256
ff0fd34e 1257 if (mp->host_joined &&
eb1d1641
HX		 1258 (timer_pending(&mp->timer) ?
1259 time_after(mp->timer.expires, now + max_delay) :
1260 try_to_del_timer_sync(&mp->timer) >= 0))
1261 mod_timer(&mp->timer, now + max_delay);
1262
e8051688
ED		 1263 for (pp = &mp->ports;
1264 (p = mlock_dereference(*pp, br)) != NULL;
1265 pp = &p->next) {
eb1d1641
HX		 1266 if (timer_pending(&p->timer) ?
1267 time_after(p->timer.expires, now + max_delay) :
1268 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1269 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 1270 }
1271
1272out:
1273 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 1274}
1275
dfd56b8b 1276#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1277static int br_ip6_multicast_query(struct net_bridge *br,
1278 struct net_bridge_port *port,
06499098
VY		 1279 struct sk_buff *skb,
1280 u16 vid)
08b202b6 1281{
ba5ea614 1282 unsigned int transport_len = ipv6_transport_len(skb);
b71d1d42 1283 const struct ipv6hdr *ip6h = ipv6_hdr(skb);
eca2a43b 1284 struct mld_msg *mld;
08b202b6
YH		 1285 struct net_bridge_mdb_entry *mp;
1286 struct mld2_query *mld2q;
e8051688
ED		 1287 struct net_bridge_port_group *p;
1288 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1289 struct br_ip saddr;
08b202b6
YH		 1290 unsigned long max_delay;
1291 unsigned long now = jiffies;
856ce5d0 1292 unsigned int offset = skb_transport_offset(skb);
b71d1d42 1293 const struct in6_addr *group = NULL;
9ed973cc 1294 bool is_general_query;
08b202b6
YH		 1295 int err = 0;
1296
1297 spin_lock(&br->multicast_lock);
1298 if (!netif_running(br->dev) ||
1299 (port && port->state == BR_STATE_DISABLED))
1300 goto out;
1301
ba5ea614 1302 if (transport_len == sizeof(*mld)) {
856ce5d0 1303 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 1304 err = -EINVAL;
1305 goto out;
1306 }
1307 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 1308 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 1309 if (max_delay)
1310 group = &mld->mld_mca;
248ba8ec 1311 } else {
856ce5d0 1312 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 1313 err = -EINVAL;
1314 goto out;
1315 }
1316 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1317 if (!mld2q->mld2q_nsrcs)
1318 group = &mld2q->mld2q_mca;
e3f5b170
DB		 1319
1320 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 1321 }
1322
9ed973cc
LL		 1323 is_general_query = group && ipv6_addr_any(group);
1324
dc4eb53a
LL		 1325 if (is_general_query) {
1326 saddr.proto = htons(ETH_P_IPV6);
1327 saddr.u.ip6 = ip6h->saddr;
b00589af 1328
dc4eb53a
LL		 1329 br_multicast_query_received(br, port, &br->ip6_other_query,
1330 &saddr, max_delay);
08b202b6 1331 goto out;
6c03ee8b
LL		 1332 } else if (!group) {
1333 goto out;
dc4eb53a 1334 }
08b202b6 1335
19e3a9c9 1336 mp = br_mdb_ip6_get(br, group, vid);
08b202b6
YH		 1337 if (!mp)
1338 goto out;
1339
1340 max_delay *= br->multicast_last_member_count;
ff0fd34e 1341 if (mp->host_joined &&
08b202b6
YH		 1342 (timer_pending(&mp->timer) ?
1343 time_after(mp->timer.expires, now + max_delay) :
1344 try_to_del_timer_sync(&mp->timer) >= 0))
1345 mod_timer(&mp->timer, now + max_delay);
1346
e8051688
ED		 1347 for (pp = &mp->ports;
1348 (p = mlock_dereference(*pp, br)) != NULL;
1349 pp = &p->next) {
08b202b6
YH		 1350 if (timer_pending(&p->timer) ?
1351 time_after(p->timer.expires, now + max_delay) :
1352 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1353 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 1354 }
1355
1356out:
1357 spin_unlock(&br->multicast_lock);
1358 return err;
1359}
1360#endif
1361
90010b36
LL		 1362static void
1363br_multicast_leave_group(struct net_bridge *br,
1364 struct net_bridge_port *port,
1365 struct br_ip *group,
1366 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 1367 struct bridge_mcast_own_query *own_query,
1368 const unsigned char *src)
eb1d1641 1369{
eb1d1641
HX		 1370 struct net_bridge_mdb_entry *mp;
1371 struct net_bridge_port_group *p;
1372 unsigned long now;
1373 unsigned long time;
1374
eb1d1641
HX		 1375 spin_lock(&br->multicast_lock);
1376 if (!netif_running(br->dev) ||
544586f7 1377 (port && port->state == BR_STATE_DISABLED))
eb1d1641
HX		 1378 goto out;
1379
19e3a9c9 1380 mp = br_mdb_ip_get(br, group);
eb1d1641
HX		 1381 if (!mp)
1382 goto out;
1383
544586f7
SA		 1384 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
1385 struct net_bridge_port_group __rcu **pp;
1386
1387 for (pp = &mp->ports;
1388 (p = mlock_dereference(*pp, br)) != NULL;
1389 pp = &p->next) {
6db6f0ea 1390 if (!br_port_group_equal(p, port, src))
544586f7
SA		 1391 continue;
1392
1393 rcu_assign_pointer(*pp, p->next);
1394 hlist_del_init(&p->mglist);
1395 del_timer(&p->timer);
4329596c 1396 kfree_rcu(p, rcu);
45ebcce5
ER		 1397 br_mdb_notify(br->dev, port, group, RTM_DELMDB,
1398 p->flags);
544586f7 1399
ff0fd34e 1400 if (!mp->ports && !mp->host_joined &&
544586f7
SA		 1401 netif_running(br->dev))
1402 mod_timer(&mp->timer, jiffies);
1403 }
1404 goto out;
1405 }
1406
1407 if (timer_pending(&other_query->timer))
1408 goto out;
1409
675779ad 1410 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
6b7df111
CW		 1411 __br_multicast_send_query(br, port, &mp->addr);
1412
1413 time = jiffies + br->multicast_last_member_count *
1414 br->multicast_last_member_interval;
cc0fdd80 1415
90010b36 1416 mod_timer(&own_query->timer, time);
6b7df111
CW		 1417
1418 for (p = mlock_dereference(mp->ports, br);
1419 p != NULL;
1420 p = mlock_dereference(p->next, br)) {
6db6f0ea 1421 if (!br_port_group_equal(p, port, src))
6b7df111
CW		 1422 continue;
1423
1424 if (!hlist_unhashed(&p->mglist) &&
1425 (timer_pending(&p->timer) ?
1426 time_after(p->timer.expires, time) :
1427 try_to_del_timer_sync(&p->timer) >= 0)) {
1428 mod_timer(&p->timer, time);
1429 }
1430
1431 break;
1432 }
1433 }
1434
eb1d1641
HX		 1435 now = jiffies;
1436 time = now + br->multicast_last_member_count *
1437 br->multicast_last_member_interval;
1438
1439 if (!port) {
ff0fd34e 1440 if (mp->host_joined &&
eb1d1641
HX		 1441 (timer_pending(&mp->timer) ?
1442 time_after(mp->timer.expires, time) :
1443 try_to_del_timer_sync(&mp->timer) >= 0)) {
1444 mod_timer(&mp->timer, time);
eb1d1641 1445 }
454594f3
LL		 1446
1447 goto out;
1448 }
1449
1450 for (p = mlock_dereference(mp->ports, br);
1451 p != NULL;
1452 p = mlock_dereference(p->next, br)) {
1453 if (p->port != port)
1454 continue;
1455
1456 if (!hlist_unhashed(&p->mglist) &&
1457 (timer_pending(&p->timer) ?
1458 time_after(p->timer.expires, time) :
1459 try_to_del_timer_sync(&p->timer) >= 0)) {
1460 mod_timer(&p->timer, time);
1461 }
1462
1463 break;
eb1d1641 1464 }
eb1d1641
HX		 1465out:
1466 spin_unlock(&br->multicast_lock);
1467}
1468
8ef2a9a5
YH		 1469static void br_ip4_multicast_leave_group(struct net_bridge *br,
1470 struct net_bridge_port *port,
b0e9a30d 1471 __be32 group,
6db6f0ea
FF		 1472 __u16 vid,
1473 const unsigned char *src)
8ef2a9a5
YH		 1474{
1475 struct br_ip br_group;
90010b36 1476 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 1477
1478 if (ipv4_is_local_multicast(group))
1479 return;
1480
90010b36
LL		 1481 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
1482
1515a63f 1483 memset(&br_group, 0, sizeof(br_group));
8ef2a9a5
YH		 1484 br_group.u.ip4 = group;
1485 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1486 br_group.vid = vid;
8ef2a9a5 1487
90010b36 1488 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
6db6f0ea 1489 own_query, src);
8ef2a9a5
YH		 1490}
1491
dfd56b8b 1492#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1493static void br_ip6_multicast_leave_group(struct net_bridge *br,
1494 struct net_bridge_port *port,
b0e9a30d 1495 const struct in6_addr *group,
6db6f0ea
FF		 1496 __u16 vid,
1497 const unsigned char *src)
08b202b6
YH		 1498{
1499 struct br_ip br_group;
90010b36 1500 struct bridge_mcast_own_query *own_query;
08b202b6 1501
3c3769e6 1502 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1503 return;
1504
90010b36
LL		 1505 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
1506
1515a63f 1507 memset(&br_group, 0, sizeof(br_group));
4e3fd7a0 1508 br_group.u.ip6 = *group;
08b202b6 1509 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1510 br_group.vid = vid;
08b202b6 1511
90010b36 1512 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
6db6f0ea 1513 own_query, src);
08b202b6
YH		 1514}
1515#endif
8ef2a9a5 1516
1080ab95
NA		 1517static void br_multicast_err_count(const struct net_bridge *br,
1518 const struct net_bridge_port *p,
1519 __be16 proto)
1520{
1521 struct bridge_mcast_stats __percpu *stats;
1522 struct bridge_mcast_stats *pstats;
1523
675779ad 1524 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 1525 return;
1526
1527 if (p)
1528 stats = p->mcast_stats;
1529 else
1530 stats = br->mcast_stats;
1531 if (WARN_ON(!stats))
1532 return;
1533
1534 pstats = this_cpu_ptr(stats);
1535
1536 u64_stats_update_begin(&pstats->syncp);
1537 switch (proto) {
1538 case htons(ETH_P_IP):
1539 pstats->mstats.igmp_parse_errors++;
1540 break;
1541#if IS_ENABLED(CONFIG_IPV6)
1542 case htons(ETH_P_IPV6):
1543 pstats->mstats.mld_parse_errors++;
1544 break;
1545#endif
1546 }
1547 u64_stats_update_end(&pstats->syncp);
1548}
1549
91b02d3d
NA		 1550static void br_multicast_pim(struct net_bridge *br,
1551 struct net_bridge_port *port,
1552 const struct sk_buff *skb)
1553{
1554 unsigned int offset = skb_transport_offset(skb);
1555 struct pimhdr *pimhdr, _pimhdr;
1556
1557 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
1558 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
1559 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
1560 return;
1561
1562 br_multicast_mark_router(br, port);
1563}
1564
4b3087c7
LL		 1565static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
1566 struct net_bridge_port *port,
1567 struct sk_buff *skb)
1568{
1569 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
1570 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
1571 return -ENOMSG;
1572
1573 br_multicast_mark_router(br, port);
1574
1575 return 0;
1576}
1577
eb1d1641
HX		 1578static int br_multicast_ipv4_rcv(struct net_bridge *br,
1579 struct net_bridge_port *port,
06499098
VY		 1580 struct sk_buff *skb,
1581 u16 vid)
eb1d1641 1582{
6db6f0ea 1583 const unsigned char *src;
eb1d1641 1584 struct igmphdr *ih;
eb1d1641
HX		 1585 int err;
1586
ba5ea614 1587 err = ip_mc_check_igmp(skb);
eb1d1641 1588
9afd85c9 1589 if (err == -ENOMSG) {
91b02d3d 1590 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 1591 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 1592 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
1593 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
1594 br_multicast_pim(br, port, skb);
4b3087c7 1595 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
08e71623 1596 br_ip4_multicast_mrd_rcv(br, port, skb);
91b02d3d 1597 }
4b3087c7 1598
eb1d1641 1599 return 0;
9afd85c9 1600 } else if (err < 0) {
1080ab95 1601 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 1602 return err;
bd4265fe 1603 }
eb1d1641 1604
9afd85c9 1605 ih = igmp_hdr(skb);
6db6f0ea 1606 src = eth_hdr(skb)->h_source;
1080ab95 1607 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
eb1d1641
HX		 1608
1609 switch (ih->type) {
1610 case IGMP_HOST_MEMBERSHIP_REPORT:
1611 case IGMPV2_HOST_MEMBERSHIP_REPORT:
62b2bcb4 1612 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
6db6f0ea 1613 err = br_ip4_multicast_add_group(br, port, ih->group, vid, src);
eb1d1641
HX		 1614 break;
1615 case IGMPV3_HOST_MEMBERSHIP_REPORT:
ba5ea614 1616 err = br_ip4_multicast_igmp3_report(br, port, skb, vid);
eb1d1641
HX		 1617 break;
1618 case IGMP_HOST_MEMBERSHIP_QUERY:
ba5ea614 1619 br_ip4_multicast_query(br, port, skb, vid);
eb1d1641
HX		 1620 break;
1621 case IGMP_HOST_LEAVE_MESSAGE:
6db6f0ea 1622 br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
eb1d1641
HX		 1623 break;
1624 }
1625
a65056ec 1626 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1627 BR_MCAST_DIR_RX);
1628
eb1d1641
HX		 1629 return err;
1630}
1631
dfd56b8b 1632#if IS_ENABLED(CONFIG_IPV6)
4b3087c7
LL		 1633static int br_ip6_multicast_mrd_rcv(struct net_bridge *br,
1634 struct net_bridge_port *port,
1635 struct sk_buff *skb)
1636{
1637 int ret;
1638
1639 if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
1640 return -ENOMSG;
1641
1642 ret = ipv6_mc_check_icmpv6(skb);
1643 if (ret < 0)
1644 return ret;
1645
1646 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
1647 return -ENOMSG;
1648
1649 br_multicast_mark_router(br, port);
1650
1651 return 0;
1652}
1653
08b202b6
YH		 1654static int br_multicast_ipv6_rcv(struct net_bridge *br,
1655 struct net_bridge_port *port,
06499098
VY		 1656 struct sk_buff *skb,
1657 u16 vid)
08b202b6 1658{
6db6f0ea 1659 const unsigned char *src;
9afd85c9 1660 struct mld_msg *mld;
08b202b6
YH		 1661 int err;
1662
ba5ea614 1663 err = ipv6_mc_check_mld(skb);
08b202b6 1664
9afd85c9
LL		 1665 if (err == -ENOMSG) {
1666 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
1667 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
4b3087c7
LL		 1668
1669 if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) {
1670 err = br_ip6_multicast_mrd_rcv(br, port, skb);
1671
1672 if (err < 0 && err != -ENOMSG) {
1673 br_multicast_err_count(br, port, skb->protocol);
1674 return err;
1675 }
1676 }
1677
08b202b6 1678 return 0;
9afd85c9 1679 } else if (err < 0) {
1080ab95 1680 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 1681 return err;
08b202b6
YH		 1682 }
1683
9afd85c9 1684 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 1685 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 1686
9afd85c9 1687 switch (mld->mld_type) {
08b202b6 1688 case ICMPV6_MGM_REPORT:
6db6f0ea 1689 src = eth_hdr(skb)->h_source;
fc2af6c7 1690 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
6db6f0ea
FF		 1691 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
1692 src);
08b202b6 1693 break;
08b202b6 1694 case ICMPV6_MLD2_REPORT:
ba5ea614 1695 err = br_ip6_multicast_mld2_report(br, port, skb, vid);
08b202b6
YH		 1696 break;
1697 case ICMPV6_MGM_QUERY:
ba5ea614 1698 err = br_ip6_multicast_query(br, port, skb, vid);
08b202b6
YH		 1699 break;
1700 case ICMPV6_MGM_REDUCTION:
6db6f0ea
FF		 1701 src = eth_hdr(skb)->h_source;
1702 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
9afd85c9 1703 break;
08b202b6
YH		 1704 }
1705
a65056ec 1706 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1707 BR_MCAST_DIR_RX);
1708
08b202b6
YH		 1709 return err;
1710}
1711#endif
1712
eb1d1641 1713int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
06499098 1714 struct sk_buff *skb, u16 vid)
eb1d1641 1715{
1080ab95
NA		 1716 int ret = 0;
1717
1fafc7a9
YH		 1718 BR_INPUT_SKB_CB(skb)->igmp = 0;
1719 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
1720
13cefad2 1721 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 1722 return 0;
1723
1724 switch (skb->protocol) {
1725 case htons(ETH_P_IP):
1080ab95
NA		 1726 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
1727 break;
dfd56b8b 1728#if IS_ENABLED(CONFIG_IPV6)
08b202b6 1729 case htons(ETH_P_IPV6):
1080ab95
NA		 1730 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
1731 break;
08b202b6 1732#endif
eb1d1641
HX		 1733 }
1734
1080ab95 1735 return ret;
eb1d1641
HX		 1736}
1737
cc0fdd80 1738static void br_multicast_query_expired(struct net_bridge *br,
2cd41431
LL		 1739 struct bridge_mcast_own_query *query,
1740 struct bridge_mcast_querier *querier)
cc0fdd80
LL		 1741{
1742 spin_lock(&br->multicast_lock);
1743 if (query->startup_sent < br->multicast_startup_query_count)
1744 query->startup_sent++;
1745
71d9f614 1746 RCU_INIT_POINTER(querier->port, NULL);
cc0fdd80
LL		 1747 br_multicast_send_query(br, NULL, query);
1748 spin_unlock(&br->multicast_lock);
1749}
1750
88c1f37f 1751static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 1752{
88c1f37f 1753 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
eb1d1641 1754
2cd41431 1755 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
cc0fdd80 1756}
eb1d1641 1757
cc0fdd80 1758#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1759static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 1760{
88c1f37f 1761 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
eb1d1641 1762
2cd41431 1763 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
eb1d1641 1764}
cc0fdd80 1765#endif
eb1d1641
HX		 1766
1767void br_multicast_init(struct net_bridge *br)
1768{
d08c6bc0 1769 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
eb1d1641 1770
7f0aec7a 1771 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641
HX		 1772 br->multicast_last_member_count = 2;
1773 br->multicast_startup_query_count = 2;
1774
1775 br->multicast_last_member_interval = HZ;
1776 br->multicast_query_response_interval = 10 * HZ;
1777 br->multicast_startup_query_interval = 125 * HZ / 4;
1778 br->multicast_query_interval = 125 * HZ;
1779 br->multicast_querier_interval = 255 * HZ;
1780 br->multicast_membership_interval = 260 * HZ;
1781
90010b36 1782 br->ip4_other_query.delay_time = 0;
2cd41431 1783 br->ip4_querier.port = NULL;
aa2ae3e7 1784 br->multicast_igmp_version = 2;
cc0fdd80 1785#if IS_ENABLED(CONFIG_IPV6)
aa2ae3e7 1786 br->multicast_mld_version = 1;
90010b36 1787 br->ip6_other_query.delay_time = 0;
2cd41431 1788 br->ip6_querier.port = NULL;
cc0fdd80 1789#endif
6919622a 1790 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
675779ad 1791 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
b00589af 1792
eb1d1641 1793 spin_lock_init(&br->multicast_lock);
88c1f37f
AP		 1794 timer_setup(&br->multicast_router_timer,
1795 br_multicast_local_router_expired, 0);
1796 timer_setup(&br->ip4_other_query.timer,
1797 br_ip4_multicast_querier_expired, 0);
1798 timer_setup(&br->ip4_own_query.timer,
1799 br_ip4_multicast_query_expired, 0);
cc0fdd80 1800#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 1801 timer_setup(&br->ip6_other_query.timer,
1802 br_ip6_multicast_querier_expired, 0);
1803 timer_setup(&br->ip6_own_query.timer,
1804 br_ip6_multicast_query_expired, 0);
cc0fdd80 1805#endif
19e3a9c9 1806 INIT_HLIST_HEAD(&br->mdb_list);
eb1d1641
HX		 1807}
1808
4effd28c
LL		 1809static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
1810{
1811 struct in_device *in_dev = in_dev_get(br->dev);
1812
1813 if (!in_dev)
1814 return;
1815
9fb20801 1816 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 1817 in_dev_put(in_dev);
1818}
1819
1820#if IS_ENABLED(CONFIG_IPV6)
1821static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
1822{
1823 struct in6_addr addr;
1824
1825 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
1826 ipv6_dev_mc_inc(br->dev, &addr);
1827}
1828#else
1829static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
1830{
1831}
1832#endif
1833
1834static void br_multicast_join_snoopers(struct net_bridge *br)
1835{
1836 br_ip4_multicast_join_snoopers(br);
1837 br_ip6_multicast_join_snoopers(br);
1838}
1839
1840static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
1841{
1842 struct in_device *in_dev = in_dev_get(br->dev);
1843
1844 if (WARN_ON(!in_dev))
1845 return;
1846
9fb20801 1847 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 1848 in_dev_put(in_dev);
1849}
1850
1851#if IS_ENABLED(CONFIG_IPV6)
1852static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
1853{
1854 struct in6_addr addr;
1855
1856 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
1857 ipv6_dev_mc_dec(br->dev, &addr);
1858}
1859#else
1860static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
1861{
1862}
1863#endif
1864
1865static void br_multicast_leave_snoopers(struct net_bridge *br)
1866{
1867 br_ip4_multicast_leave_snoopers(br);
1868 br_ip6_multicast_leave_snoopers(br);
1869}
1870
cc0fdd80 1871static void __br_multicast_open(struct net_bridge *br,
90010b36 1872 struct bridge_mcast_own_query *query)
eb1d1641 1873{
cc0fdd80 1874 query->startup_sent = 0;
eb1d1641 1875
13cefad2 1876 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 1877 return;
1878
cc0fdd80
LL		 1879 mod_timer(&query->timer, jiffies);
1880}
1881
1882void br_multicast_open(struct net_bridge *br)
1883{
4effd28c
LL		 1884 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
1885 br_multicast_join_snoopers(br);
1886
90010b36 1887 __br_multicast_open(br, &br->ip4_own_query);
cc0fdd80 1888#if IS_ENABLED(CONFIG_IPV6)
90010b36 1889 __br_multicast_open(br, &br->ip6_own_query);
cc0fdd80 1890#endif
eb1d1641
HX		 1891}
1892
1893void br_multicast_stop(struct net_bridge *br)
1894{
eb1d1641 1895 del_timer_sync(&br->multicast_router_timer);
90010b36
LL		 1896 del_timer_sync(&br->ip4_other_query.timer);
1897 del_timer_sync(&br->ip4_own_query.timer);
cc0fdd80 1898#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 1899 del_timer_sync(&br->ip6_other_query.timer);
1900 del_timer_sync(&br->ip6_own_query.timer);
cc0fdd80 1901#endif
4effd28c
LL		 1902
1903 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
1904 br_multicast_leave_snoopers(br);
e10177ab
SA		 1905}
1906
1907void br_multicast_dev_del(struct net_bridge *br)
1908{
e10177ab 1909 struct net_bridge_mdb_entry *mp;
19e3a9c9 1910 struct hlist_node *tmp;
eb1d1641
HX		 1911
1912 spin_lock_bh(&br->multicast_lock);
19e3a9c9
NA		 1913 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) {
1914 del_timer(&mp->timer);
1915 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
1916 br_mdb_rht_params);
1917 hlist_del_rcu(&mp->mdb_node);
4329596c 1918 kfree_rcu(mp, rcu);
eb1d1641 1919 }
eb1d1641 1920 spin_unlock_bh(&br->multicast_lock);
19e3a9c9 1921
4329596c 1922 rcu_barrier();
eb1d1641 1923}
0909e117
HX		 1924
1925int br_multicast_set_router(struct net_bridge *br, unsigned long val)
1926{
6ae4ae8e 1927 int err = -EINVAL;
0909e117
HX		 1928
1929 spin_lock_bh(&br->multicast_lock);
0909e117
HX		 1930
1931 switch (val) {
7f0aec7a
NA		 1932 case MDB_RTR_TYPE_DISABLED:
1933 case MDB_RTR_TYPE_PERM:
77041420 1934 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
0909e117 1935 del_timer(&br->multicast_router_timer);
77041420
YG		 1936 br->multicast_router = val;
1937 err = 0;
1938 break;
7f0aec7a 1939 case MDB_RTR_TYPE_TEMP_QUERY:
77041420
YG		 1940 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
1941 br_mc_router_state_change(br, false);
0909e117
HX		 1942 br->multicast_router = val;
1943 err = 0;
1944 break;
0909e117
HX		 1945 }
1946
0909e117
HX		 1947 spin_unlock_bh(&br->multicast_lock);
1948
1949 return err;
1950}
1951
7f0aec7a
NA		 1952static void __del_port_router(struct net_bridge_port *p)
1953{
1954 if (hlist_unhashed(&p->rlist))
1955 return;
1956 hlist_del_init_rcu(&p->rlist);
1957 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
6d549648 1958 br_port_mc_router_state_change(p, false);
f12e7d95
NF		 1959
1960 /* don't allow timer refresh */
1961 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
1962 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 1963}
1964
0909e117
HX		 1965int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
1966{
1967 struct net_bridge *br = p->br;
a55d8246 1968 unsigned long now = jiffies;
6ae4ae8e 1969 int err = -EINVAL;
0909e117
HX		 1970
1971 spin_lock(&br->multicast_lock);
4950cfd1 1972 if (p->multicast_router == val) {
a55d8246
NA		 1973 /* Refresh the temp router port timer */
1974 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
1975 mod_timer(&p->multicast_router_timer,
1976 now + br->multicast_querier_interval);
4950cfd1
NA		 1977 err = 0;
1978 goto unlock;
1979 }
0909e117 1980 switch (val) {
7f0aec7a
NA		 1981 case MDB_RTR_TYPE_DISABLED:
1982 p->multicast_router = MDB_RTR_TYPE_DISABLED;
1983 __del_port_router(p);
1984 del_timer(&p->multicast_router_timer);
1985 break;
1986 case MDB_RTR_TYPE_TEMP_QUERY:
1987 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1988 __del_port_router(p);
1989 break;
1990 case MDB_RTR_TYPE_PERM:
1991 p->multicast_router = MDB_RTR_TYPE_PERM;
0909e117 1992 del_timer(&p->multicast_router_timer);
0909e117
HX		 1993 br_multicast_add_router(br, p);
1994 break;
a55d8246
NA		 1995 case MDB_RTR_TYPE_TEMP:
1996 p->multicast_router = MDB_RTR_TYPE_TEMP;
1997 br_multicast_mark_router(br, p);
1998 break;
7f0aec7a
NA		 1999 default:
2000 goto unlock;
0909e117 2001 }
7f0aec7a
NA		 2002 err = 0;
2003unlock:
0909e117
HX		 2004 spin_unlock(&br->multicast_lock);
2005
2006 return err;
2007}
561f1103 2008
cc0fdd80 2009static void br_multicast_start_querier(struct net_bridge *br,
90010b36 2010 struct bridge_mcast_own_query *query)
561f1103
HX		 2011{
2012 struct net_bridge_port *port;
74857216 2013
cc0fdd80 2014 __br_multicast_open(br, query);
74857216
HX		 2015
2016 list_for_each_entry(port, &br->port_list, list) {
2017 if (port->state == BR_STATE_DISABLED ||
2018 port->state == BR_STATE_BLOCKING)
2019 continue;
2020
90010b36
LL		 2021 if (query == &br->ip4_own_query)
2022 br_multicast_enable(&port->ip4_own_query);
cc0fdd80
LL		 2023#if IS_ENABLED(CONFIG_IPV6)
2024 else
90010b36 2025 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 2026#endif
74857216
HX		 2027 }
2028}
2029
2030int br_multicast_toggle(struct net_bridge *br, unsigned long val)
2031{
7cb3f921 2032 struct net_bridge_port *port;
561f1103 2033
ef5e0d82 2034 spin_lock_bh(&br->multicast_lock);
13cefad2 2035 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 2036 goto unlock;
2037
13cefad2
NA		 2038 br_mc_disabled_update(br->dev, val);
2039 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4effd28c
LL		 2040 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
2041 br_multicast_leave_snoopers(br);
561f1103 2042 goto unlock;
4effd28c 2043 }
561f1103 2044
3a7fda06
HX		 2045 if (!netif_running(br->dev))
2046 goto unlock;
2047
7cb3f921
NA		 2048 br_multicast_open(br);
2049 list_for_each_entry(port, &br->port_list, list)
2050 __br_multicast_enable_port(port);
561f1103
HX		 2051
2052unlock:
ef5e0d82 2053 spin_unlock_bh(&br->multicast_lock);
561f1103 2054
a26d94bf 2055 return 0;
561f1103 2056}
b195167f 2057
9341b988
IS		 2058bool br_multicast_enabled(const struct net_device *dev)
2059{
2060 struct net_bridge *br = netdev_priv(dev);
2061
13cefad2 2062 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 2063}
2064EXPORT_SYMBOL_GPL(br_multicast_enabled);
2065
0912bda4
YG		 2066bool br_multicast_router(const struct net_device *dev)
2067{
2068 struct net_bridge *br = netdev_priv(dev);
2069 bool is_router;
2070
2071 spin_lock_bh(&br->multicast_lock);
2072 is_router = br_multicast_is_router(br);
2073 spin_unlock_bh(&br->multicast_lock);
2074 return is_router;
2075}
2076EXPORT_SYMBOL_GPL(br_multicast_router);
2077
c5c23260
HX		 2078int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
2079{
b00589af
LL		 2080 unsigned long max_delay;
2081
c5c23260
HX		 2082 val = !!val;
2083
2084 spin_lock_bh(&br->multicast_lock);
675779ad 2085 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
c5c23260
HX		 2086 goto unlock;
2087
675779ad 2088 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
b00589af
LL		 2089 if (!val)
2090 goto unlock;
2091
2092 max_delay = br->multicast_query_response_interval;
b00589af 2093
90010b36
LL		 2094 if (!timer_pending(&br->ip4_other_query.timer))
2095 br->ip4_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2096
90010b36 2097 br_multicast_start_querier(br, &br->ip4_own_query);
cc0fdd80
LL		 2098
2099#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 2100 if (!timer_pending(&br->ip6_other_query.timer))
2101 br->ip6_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2102
90010b36 2103 br_multicast_start_querier(br, &br->ip6_own_query);
cc0fdd80 2104#endif
c5c23260
HX		 2105
2106unlock:
2107 spin_unlock_bh(&br->multicast_lock);
2108
2109 return 0;
2110}
2111
5e923585
NA		 2112int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
2113{
2114 /* Currently we support only version 2 and 3 */
2115 switch (val) {
2116 case 2:
2117 case 3:
2118 break;
2119 default:
2120 return -EINVAL;
2121 }
2122
2123 spin_lock_bh(&br->multicast_lock);
2124 br->multicast_igmp_version = val;
2125 spin_unlock_bh(&br->multicast_lock);
2126
2127 return 0;
2128}
2129
aa2ae3e7
NA		 2130#if IS_ENABLED(CONFIG_IPV6)
2131int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
2132{
2133 /* Currently we support version 1 and 2 */
2134 switch (val) {
2135 case 1:
2136 case 2:
2137 break;
2138 default:
2139 return -EINVAL;
2140 }
2141
2142 spin_lock_bh(&br->multicast_lock);
2143 br->multicast_mld_version = val;
2144 spin_unlock_bh(&br->multicast_lock);
2145
2146 return 0;
2147}
2148#endif
2149
07f8ac4a
LL		 2150/**
2151 * br_multicast_list_adjacent - Returns snooped multicast addresses
2152 * @dev: The bridge port adjacent to which to retrieve addresses
2153 * @br_ip_list: The list to store found, snooped multicast IP addresses in
2154 *
2155 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
2156 * snooping feature on all bridge ports of dev's bridge device, excluding
2157 * the addresses from dev itself.
2158 *
2159 * Returns the number of items added to br_ip_list.
2160 *
2161 * Notes:
2162 * - br_ip_list needs to be initialized by caller
2163 * - br_ip_list might contain duplicates in the end
2164 * (needs to be taken care of by caller)
2165 * - br_ip_list needs to be freed by caller
2166 */
2167int br_multicast_list_adjacent(struct net_device *dev,
2168 struct list_head *br_ip_list)
2169{
2170 struct net_bridge *br;
2171 struct net_bridge_port *port;
2172 struct net_bridge_port_group *group;
2173 struct br_ip_list *entry;
2174 int count = 0;
2175
2176 rcu_read_lock();
35f861e3 2177 if (!br_ip_list || !netif_is_bridge_port(dev))
07f8ac4a
LL		 2178 goto unlock;
2179
2180 port = br_port_get_rcu(dev);
2181 if (!port || !port->br)
2182 goto unlock;
2183
2184 br = port->br;
2185
2186 list_for_each_entry_rcu(port, &br->port_list, list) {
2187 if (!port->dev || port->dev == dev)
2188 continue;
2189
2190 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
2191 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
2192 if (!entry)
2193 goto unlock;
2194
2195 entry->addr = group->addr;
2196 list_add(&entry->list, br_ip_list);
2197 count++;
2198 }
2199 }
2200
2201unlock:
2202 rcu_read_unlock();
2203 return count;
2204}
2205EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2cd41431 2206
c34963e2
LL		 2207/**
2208 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
2209 * @dev: The bridge port providing the bridge on which to check for a querier
2210 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2211 *
2212 * Checks whether the given interface has a bridge on top and if so returns
2213 * true if a valid querier exists anywhere on the bridged link layer.
2214 * Otherwise returns false.
2215 */
2216bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
2217{
2218 struct net_bridge *br;
2219 struct net_bridge_port *port;
2220 struct ethhdr eth;
2221 bool ret = false;
2222
2223 rcu_read_lock();
35f861e3 2224 if (!netif_is_bridge_port(dev))
c34963e2
LL		 2225 goto unlock;
2226
2227 port = br_port_get_rcu(dev);
2228 if (!port || !port->br)
2229 goto unlock;
2230
2231 br = port->br;
2232
2233 memset(&eth, 0, sizeof(eth));
2234 eth.h_proto = htons(proto);
2235
2236 ret = br_multicast_querier_exists(br, &eth);
2237
2238unlock:
2239 rcu_read_unlock();
2240 return ret;
2241}
2242EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
2243
2cd41431
LL		 2244/**
2245 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
2246 * @dev: The bridge port adjacent to which to check for a querier
2247 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2248 *
2249 * Checks whether the given interface has a bridge on top and if so returns
2250 * true if a selected querier is behind one of the other ports of this
2251 * bridge. Otherwise returns false.
2252 */
2253bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
2254{
2255 struct net_bridge *br;
2256 struct net_bridge_port *port;
2257 bool ret = false;
2258
2259 rcu_read_lock();
35f861e3 2260 if (!netif_is_bridge_port(dev))
2cd41431
LL		 2261 goto unlock;
2262
2263 port = br_port_get_rcu(dev);
2264 if (!port || !port->br)
2265 goto unlock;
2266
2267 br = port->br;
2268
2269 switch (proto) {
2270 case ETH_P_IP:
2271 if (!timer_pending(&br->ip4_other_query.timer) ||
2272 rcu_dereference(br->ip4_querier.port) == port)
2273 goto unlock;
2274 break;
3993c4e1 2275#if IS_ENABLED(CONFIG_IPV6)
2cd41431
LL		 2276 case ETH_P_IPV6:
2277 if (!timer_pending(&br->ip6_other_query.timer) ||
2278 rcu_dereference(br->ip6_querier.port) == port)
2279 goto unlock;
2280 break;
3993c4e1 2281#endif
2cd41431
LL		 2282 default:
2283 goto unlock;
2284 }
2285
2286 ret = true;
2287unlock:
2288 rcu_read_unlock();
2289 return ret;
2290}
2291EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
1080ab95
NA		 2292
2293static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 2294 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2295{
2296 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 2297 __be16 proto = skb->protocol;
2298 unsigned int t_len;
1080ab95
NA		 2299
2300 u64_stats_update_begin(&pstats->syncp);
2301 switch (proto) {
2302 case htons(ETH_P_IP):
a65056ec 2303 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 2304 switch (type) {
2305 case IGMP_HOST_MEMBERSHIP_REPORT:
2306 pstats->mstats.igmp_v1reports[dir]++;
2307 break;
2308 case IGMPV2_HOST_MEMBERSHIP_REPORT:
2309 pstats->mstats.igmp_v2reports[dir]++;
2310 break;
2311 case IGMPV3_HOST_MEMBERSHIP_REPORT:
2312 pstats->mstats.igmp_v3reports[dir]++;
2313 break;
2314 case IGMP_HOST_MEMBERSHIP_QUERY:
a65056ec
NA		 2315 if (t_len != sizeof(struct igmphdr)) {
2316 pstats->mstats.igmp_v3queries[dir]++;
2317 } else {
2318 unsigned int offset = skb_transport_offset(skb);
2319 struct igmphdr *ih, _ihdr;
2320
2321 ih = skb_header_pointer(skb, offset,
2322 sizeof(_ihdr), &_ihdr);
2323 if (!ih)
2324 break;
2325 if (!ih->code)
2326 pstats->mstats.igmp_v1queries[dir]++;
2327 else
2328 pstats->mstats.igmp_v2queries[dir]++;
2329 }
1080ab95
NA		 2330 break;
2331 case IGMP_HOST_LEAVE_MESSAGE:
2332 pstats->mstats.igmp_leaves[dir]++;
2333 break;
2334 }
2335 break;
2336#if IS_ENABLED(CONFIG_IPV6)
2337 case htons(ETH_P_IPV6):
a65056ec
NA		 2338 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
2339 sizeof(struct ipv6hdr);
2340 t_len -= skb_network_header_len(skb);
1080ab95
NA		 2341 switch (type) {
2342 case ICMPV6_MGM_REPORT:
2343 pstats->mstats.mld_v1reports[dir]++;
2344 break;
2345 case ICMPV6_MLD2_REPORT:
2346 pstats->mstats.mld_v2reports[dir]++;
2347 break;
2348 case ICMPV6_MGM_QUERY:
a65056ec
NA		 2349 if (t_len != sizeof(struct mld_msg))
2350 pstats->mstats.mld_v2queries[dir]++;
2351 else
2352 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 2353 break;
2354 case ICMPV6_MGM_REDUCTION:
2355 pstats->mstats.mld_leaves[dir]++;
2356 break;
2357 }
2358 break;
2359#endif /* CONFIG_IPV6 */
2360 }
2361 u64_stats_update_end(&pstats->syncp);
2362}
2363
2364void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
a65056ec 2365 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2366{
2367 struct bridge_mcast_stats __percpu *stats;
2368
2369 /* if multicast_disabled is true then igmp type can't be set */
675779ad 2370 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 2371 return;
2372
2373 if (p)
2374 stats = p->mcast_stats;
2375 else
2376 stats = br->mcast_stats;
2377 if (WARN_ON(!stats))
2378 return;
2379
a65056ec 2380 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 2381}
2382
2383int br_multicast_init_stats(struct net_bridge *br)
2384{
2385 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2386 if (!br->mcast_stats)
2387 return -ENOMEM;
2388
2389 return 0;
2390}
2391
b6fe0440
IS		 2392void br_multicast_uninit_stats(struct net_bridge *br)
2393{
2394 free_percpu(br->mcast_stats);
2395}
2396
1080ab95
NA		 2397static void mcast_stats_add_dir(u64 *dst, u64 *src)
2398{
2399 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
2400 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
2401}
2402
2403void br_multicast_get_stats(const struct net_bridge *br,
2404 const struct net_bridge_port *p,
2405 struct br_mcast_stats *dest)
2406{
2407 struct bridge_mcast_stats __percpu *stats;
2408 struct br_mcast_stats tdst;
2409 int i;
2410
2411 memset(dest, 0, sizeof(*dest));
2412 if (p)
2413 stats = p->mcast_stats;
2414 else
2415 stats = br->mcast_stats;
2416 if (WARN_ON(!stats))
2417 return;
2418
2419 memset(&tdst, 0, sizeof(tdst));
2420 for_each_possible_cpu(i) {
2421 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
2422 struct br_mcast_stats temp;
2423 unsigned int start;
2424
2425 do {
2426 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
2427 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
2428 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
2429
a65056ec
NA		 2430 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
2431 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
2432 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
1080ab95
NA		 2433 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
2434 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
2435 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
2436 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
2437 tdst.igmp_parse_errors += temp.igmp_parse_errors;
2438
a65056ec
NA		 2439 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
2440 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 2441 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
2442 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
2443 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
2444 tdst.mld_parse_errors += temp.mld_parse_errors;
2445 }
2446 memcpy(dest, &tdst, sizeof(*dest));
2447}
19e3a9c9
NA		 2448
2449int br_mdb_hash_init(struct net_bridge *br)
2450{
2451 return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
2452}
2453
2454void br_mdb_hash_fini(struct net_bridge *br)
2455{
2456 rhashtable_destroy(&br->mdb_hash_tbl);
2457}
Ubuntu Hirsute Linux kernel mirror