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net: bridge: convert multicast to generic rhashtable
[thirdparty/kernel/stable.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>
17#include <linux/jhash.h>
18#include <linux/kernel.h>
b195167f 19#include <linux/log2.h>
eb1d1641
HX		 20#include <linux/netdevice.h>
21#include <linux/netfilter_bridge.h>
22#include <linux/random.h>
23#include <linux/rculist.h>
24#include <linux/skbuff.h>
25#include <linux/slab.h>
26#include <linux/timer.h>
1c8ad5bf 27#include <linux/inetdevice.h>
91b02d3d 28#include <linux/mroute.h>
eb1d1641 29#include <net/ip.h>
147c1e9b 30#include <net/switchdev.h>
dfd56b8b 31#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 32#include <net/ipv6.h>
33#include <net/mld.h>
d4c4f07d 34#include <net/ip6_checksum.h>
3c3769e6 35#include <net/addrconf.h>
08b202b6 36#endif
eb1d1641
HX		 37
38#include "br_private.h"
39
19e3a9c9
NA		 40static const struct rhashtable_params br_mdb_rht_params = {
41 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
42 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
43 .key_len = sizeof(struct br_ip),
44 .automatic_shrinking = true,
45 .locks_mul = 1,
46};
47
cc0fdd80 48static void br_multicast_start_querier(struct net_bridge *br,
90010b36 49 struct bridge_mcast_own_query *query);
754bc547
SA		 50static void br_multicast_add_router(struct net_bridge *br,
51 struct net_bridge_port *port);
bc8c20ac
SA		 52static void br_ip4_multicast_leave_group(struct net_bridge *br,
53 struct net_bridge_port *port,
54 __be32 group,
6db6f0ea
FF		 55 __u16 vid,
56 const unsigned char *src);
57
f12e7d95 58static void __del_port_router(struct net_bridge_port *p);
bc8c20ac
SA		 59#if IS_ENABLED(CONFIG_IPV6)
60static void br_ip6_multicast_leave_group(struct net_bridge *br,
61 struct net_bridge_port *port,
62 const struct in6_addr *group,
6db6f0ea 63 __u16 vid, const unsigned char *src);
bc8c20ac 64#endif
c83b8fab 65
8ef2a9a5
YH		 66static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
67{
68 if (a->proto != b->proto)
69 return 0;
b0e9a30d
VY		 70 if (a->vid != b->vid)
71 return 0;
8ef2a9a5
YH		 72 switch (a->proto) {
73 case htons(ETH_P_IP):
74 return a->u.ip4 == b->u.ip4;
dfd56b8b 75#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 76 case htons(ETH_P_IPV6):
77 return ipv6_addr_equal(&a->u.ip6, &b->u.ip6);
78#endif
8ef2a9a5
YH		 79 }
80 return 0;
81}
82
19e3a9c9
NA		 83static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
84 struct br_ip *dst)
08b202b6 85{
19e3a9c9 86 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 87}
08b202b6 88
19e3a9c9
NA		 89struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
90 struct br_ip *dst)
eb1d1641 91{
19e3a9c9 92 struct net_bridge_mdb_entry *ent;
eb1d1641 93
19e3a9c9 94 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 95
19e3a9c9
NA		 96 rcu_read_lock();
97 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
98 rcu_read_unlock();
7f285fa7 99
19e3a9c9 100 return ent;
7f285fa7
HX		 101}
102
19e3a9c9
NA		 103static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
104 __be32 dst, __u16 vid)
eb1d1641 105{
8ef2a9a5
YH		 106 struct br_ip br_dst;
107
19e3a9c9 108 memset(&br_dst, 0, sizeof(br_dst));
8ef2a9a5
YH		 109 br_dst.u.ip4 = dst;
110 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 111 br_dst.vid = vid;
0821ec55 112
19e3a9c9 113 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 114}
115
dfd56b8b 116#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 117static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
118 const struct in6_addr *dst,
119 __u16 vid)
08b202b6
YH		 120{
121 struct br_ip br_dst;
0821ec55 122
19e3a9c9 123 memset(&br_dst, 0, sizeof(br_dst));
4e3fd7a0 124 br_dst.u.ip6 = *dst;
08b202b6 125 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 126 br_dst.vid = vid;
08b202b6 127
19e3a9c9 128 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 129}
130#endif
131
eb1d1641 132struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 133 struct sk_buff *skb, u16 vid)
eb1d1641 134{
8ef2a9a5
YH		 135 struct br_ip ip;
136
13cefad2 137 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 138 return NULL;
139
8ef2a9a5 140 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 141 return NULL;
142
19e3a9c9 143 memset(&ip, 0, sizeof(ip));
8ef2a9a5 144 ip.proto = skb->protocol;
fbca58a2 145 ip.vid = vid;
8ef2a9a5 146
eb1d1641
HX		 147 switch (skb->protocol) {
148 case htons(ETH_P_IP):
8ef2a9a5
YH		 149 ip.u.ip4 = ip_hdr(skb)->daddr;
150 break;
dfd56b8b 151#if IS_ENABLED(CONFIG_IPV6)
08b202b6 152 case htons(ETH_P_IPV6):
4e3fd7a0 153 ip.u.ip6 = ipv6_hdr(skb)->daddr;
08b202b6
YH		 154 break;
155#endif
8ef2a9a5
YH		 156 default:
157 return NULL;
eb1d1641
HX		 158 }
159
19e3a9c9 160 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 161}
162
cfd56754 163void br_multicast_free_pg(struct rcu_head *head)
eb1d1641
HX		 164{
165 struct net_bridge_port_group *p =
166 container_of(head, struct net_bridge_port_group, rcu);
167
168 kfree(p);
169}
170
171static void br_multicast_free_group(struct rcu_head *head)
172{
173 struct net_bridge_mdb_entry *mp =
174 container_of(head, struct net_bridge_mdb_entry, rcu);
175
176 kfree(mp);
177}
178
88c1f37f 179static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 180{
88c1f37f 181 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 182 struct net_bridge *br = mp->br;
eb1d1641
HX		 183
184 spin_lock(&br->multicast_lock);
185 if (!netif_running(br->dev) || timer_pending(&mp->timer))
186 goto out;
187
ff0fd34e 188 mp->host_joined = false;
2a26028d 189 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_DELMDB, 0);
eb1d1641
HX		 190
191 if (mp->ports)
192 goto out;
193
19e3a9c9
NA		 194 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
195 br_mdb_rht_params);
196 hlist_del_rcu(&mp->mdb_node);
eb1d1641 197
eb1d1641
HX		 198 call_rcu_bh(&mp->rcu, br_multicast_free_group);
199
200out:
201 spin_unlock(&br->multicast_lock);
202}
203
204static void br_multicast_del_pg(struct net_bridge *br,
205 struct net_bridge_port_group *pg)
206{
eb1d1641
HX		 207 struct net_bridge_mdb_entry *mp;
208 struct net_bridge_port_group *p;
e8051688
ED		 209 struct net_bridge_port_group __rcu **pp;
210
19e3a9c9 211 mp = br_mdb_ip_get(br, &pg->addr);
eb1d1641
HX		 212 if (WARN_ON(!mp))
213 return;
214
e8051688
ED		 215 for (pp = &mp->ports;
216 (p = mlock_dereference(*pp, br)) != NULL;
217 pp = &p->next) {
eb1d1641
HX		 218 if (p != pg)
219 continue;
220
83f6a740 221 rcu_assign_pointer(*pp, p->next);
eb1d1641
HX		 222 hlist_del_init(&p->mglist);
223 del_timer(&p->timer);
45ebcce5
ER		 224 br_mdb_notify(br->dev, p->port, &pg->addr, RTM_DELMDB,
225 p->flags);
eb1d1641
HX		 226 call_rcu_bh(&p->rcu, br_multicast_free_pg);
227
ff0fd34e 228 if (!mp->ports && !mp->host_joined &&
eb1d1641
HX		 229 netif_running(br->dev))
230 mod_timer(&mp->timer, jiffies);
231
232 return;
233 }
234
235 WARN_ON(1);
236}
237
88c1f37f 238static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 239{
88c1f37f 240 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
eb1d1641
HX		 241 struct net_bridge *br = pg->port->br;
242
243 spin_lock(&br->multicast_lock);
244 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 245 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 246 goto out;
247
248 br_multicast_del_pg(br, pg);
249
250out:
251 spin_unlock(&br->multicast_lock);
252}
253
8ef2a9a5 254static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 255 __be32 group,
256 u8 *igmp_type)
eb1d1641 257{
5e923585
NA		 258 struct igmpv3_query *ihv3;
259 size_t igmp_hdr_size;
eb1d1641
HX		 260 struct sk_buff *skb;
261 struct igmphdr *ih;
262 struct ethhdr *eth;
263 struct iphdr *iph;
264
5e923585
NA		 265 igmp_hdr_size = sizeof(*ih);
266 if (br->multicast_igmp_version == 3)
267 igmp_hdr_size = sizeof(*ihv3);
eb1d1641 268 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*iph) +
5e923585 269 igmp_hdr_size + 4);
eb1d1641
HX		 270 if (!skb)
271 goto out;
272
273 skb->protocol = htons(ETH_P_IP);
274
275 skb_reset_mac_header(skb);
276 eth = eth_hdr(skb);
277
e5a727f6 278 ether_addr_copy(eth->h_source, br->dev->dev_addr);
eb1d1641
HX		 279 eth->h_dest[0] = 1;
280 eth->h_dest[1] = 0;
281 eth->h_dest[2] = 0x5e;
282 eth->h_dest[3] = 0;
283 eth->h_dest[4] = 0;
284 eth->h_dest[5] = 1;
285 eth->h_proto = htons(ETH_P_IP);
286 skb_put(skb, sizeof(*eth));
287
288 skb_set_network_header(skb, skb->len);
289 iph = ip_hdr(skb);
290
291 iph->version = 4;
292 iph->ihl = 6;
293 iph->tos = 0xc0;
5e923585 294 iph->tot_len = htons(sizeof(*iph) + igmp_hdr_size + 4);
eb1d1641
HX		 295 iph->id = 0;
296 iph->frag_off = htons(IP_DF);
297 iph->ttl = 1;
298 iph->protocol = IPPROTO_IGMP;
675779ad 299 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
1c8ad5bf 300 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
eb1d1641
HX		 301 iph->daddr = htonl(INADDR_ALLHOSTS_GROUP);
302 ((u8 *)&iph[1])[0] = IPOPT_RA;
303 ((u8 *)&iph[1])[1] = 4;
304 ((u8 *)&iph[1])[2] = 0;
305 ((u8 *)&iph[1])[3] = 0;
306 ip_send_check(iph);
307 skb_put(skb, 24);
308
309 skb_set_transport_header(skb, skb->len);
1080ab95 310 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 311
5e923585
NA		 312 switch (br->multicast_igmp_version) {
313 case 2:
314 ih = igmp_hdr(skb);
315 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
316 ih->code = (group ? br->multicast_last_member_interval :
317 br->multicast_query_response_interval) /
318 (HZ / IGMP_TIMER_SCALE);
319 ih->group = group;
320 ih->csum = 0;
321 ih->csum = ip_compute_csum((void *)ih, sizeof(*ih));
322 break;
323 case 3:
324 ihv3 = igmpv3_query_hdr(skb);
325 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
326 ihv3->code = (group ? br->multicast_last_member_interval :
327 br->multicast_query_response_interval) /
328 (HZ / IGMP_TIMER_SCALE);
329 ihv3->group = group;
330 ihv3->qqic = br->multicast_query_interval / HZ;
331 ihv3->nsrcs = 0;
332 ihv3->resv = 0;
333 ihv3->suppress = 0;
334 ihv3->qrv = 2;
335 ihv3->csum = 0;
336 ihv3->csum = ip_compute_csum((void *)ihv3, sizeof(*ihv3));
337 break;
338 }
339
340 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 341 __skb_pull(skb, sizeof(*eth));
342
343out:
344 return skb;
345}
346
dfd56b8b 347#if IS_ENABLED(CONFIG_IPV6)
08b202b6 348static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 349 const struct in6_addr *grp,
350 u8 *igmp_type)
08b202b6 351{
aa2ae3e7
NA		 352 struct mld2_query *mld2q;
353 unsigned long interval;
08b202b6
YH		 354 struct ipv6hdr *ip6h;
355 struct mld_msg *mldq;
aa2ae3e7
NA		 356 size_t mld_hdr_size;
357 struct sk_buff *skb;
08b202b6
YH		 358 struct ethhdr *eth;
359 u8 *hopopt;
08b202b6 360
aa2ae3e7
NA		 361 mld_hdr_size = sizeof(*mldq);
362 if (br->multicast_mld_version == 2)
363 mld_hdr_size = sizeof(*mld2q);
08b202b6 364 skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
aa2ae3e7 365 8 + mld_hdr_size);
08b202b6
YH		 366 if (!skb)
367 goto out;
368
369 skb->protocol = htons(ETH_P_IPV6);
370
371 /* Ethernet header */
372 skb_reset_mac_header(skb);
373 eth = eth_hdr(skb);
374
e5a727f6 375 ether_addr_copy(eth->h_source, br->dev->dev_addr);
08b202b6
YH		 376 eth->h_proto = htons(ETH_P_IPV6);
377 skb_put(skb, sizeof(*eth));
378
379 /* IPv6 header + HbH option */
380 skb_set_network_header(skb, skb->len);
381 ip6h = ipv6_hdr(skb);
382
383 *(__force __be32 *)ip6h = htonl(0x60000000);
aa2ae3e7 384 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 385 ip6h->nexthdr = IPPROTO_HOPOPTS;
386 ip6h->hop_limit = 1;
a7bff75b 387 ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
d1d81d4c
UW		 388 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
389 &ip6h->saddr)) {
390 kfree_skb(skb);
675779ad 391 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 392 return NULL;
393 }
0888d5f3 394
675779ad 395 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 396 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 397
398 hopopt = (u8 *)(ip6h + 1);
399 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
400 hopopt[1] = 0; /* length of HbH */
401 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
402 hopopt[3] = 2; /* Length of RA Option */
403 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
404 hopopt[5] = 0;
1de5a71c
EZ		 405 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
406 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 407
408 skb_put(skb, sizeof(*ip6h) + 8);
409
410 /* ICMPv6 */
411 skb_set_transport_header(skb, skb->len);
1080ab95 412 interval = ipv6_addr_any(grp) ?
32de868c
LL		 413 br->multicast_query_response_interval :
414 br->multicast_last_member_interval;
1080ab95 415 *igmp_type = ICMPV6_MGM_QUERY;
aa2ae3e7
NA		 416 switch (br->multicast_mld_version) {
417 case 1:
418 mldq = (struct mld_msg *)icmp6_hdr(skb);
419 mldq->mld_type = ICMPV6_MGM_QUERY;
420 mldq->mld_code = 0;
421 mldq->mld_cksum = 0;
422 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
423 mldq->mld_reserved = 0;
424 mldq->mld_mca = *grp;
425 mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
426 sizeof(*mldq), IPPROTO_ICMPV6,
427 csum_partial(mldq,
428 sizeof(*mldq),
429 0));
430 break;
431 case 2:
432 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 433 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 434 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
435 mld2q->mld2q_code = 0;
436 mld2q->mld2q_cksum = 0;
437 mld2q->mld2q_resv1 = 0;
438 mld2q->mld2q_resv2 = 0;
439 mld2q->mld2q_suppress = 0;
440 mld2q->mld2q_qrv = 2;
441 mld2q->mld2q_nsrcs = 0;
442 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
443 mld2q->mld2q_mca = *grp;
444 mld2q->mld2q_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
445 sizeof(*mld2q),
446 IPPROTO_ICMPV6,
447 csum_partial(mld2q,
448 sizeof(*mld2q),
449 0));
450 break;
451 }
452 skb_put(skb, mld_hdr_size);
08b202b6
YH		 453
454 __skb_pull(skb, sizeof(*eth));
455
456out:
457 return skb;
458}
459#endif
460
8ef2a9a5 461static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
1080ab95
NA		 462 struct br_ip *addr,
463 u8 *igmp_type)
8ef2a9a5
YH		 464{
465 switch (addr->proto) {
466 case htons(ETH_P_IP):
1080ab95 467 return br_ip4_multicast_alloc_query(br, addr->u.ip4, igmp_type);
dfd56b8b 468#if IS_ENABLED(CONFIG_IPV6)
08b202b6 469 case htons(ETH_P_IPV6):
1080ab95
NA		 470 return br_ip6_multicast_alloc_query(br, &addr->u.ip6,
471 igmp_type);
08b202b6 472#endif
8ef2a9a5
YH		 473 }
474 return NULL;
475}
476
cfd56754 477struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 478 struct br_ip *group)
eb1d1641 479{
eb1d1641 480 struct net_bridge_mdb_entry *mp;
4c0833bc 481 int err;
eb1d1641 482
19e3a9c9
NA		 483 mp = br_mdb_ip_get(br, group);
484 if (mp)
485 return mp;
eb1d1641 486
19e3a9c9
NA		 487 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
488 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
489 return ERR_PTR(-E2BIG);
eb1d1641
HX		 490 }
491
492 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
493 if (unlikely(!mp))
4c0833bc 494 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 495
496 mp->br = br;
8ef2a9a5 497 mp->addr = *group;
88c1f37f 498 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 499 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
500 br_mdb_rht_params);
501 if (err) {
502 kfree(mp);
503 mp = ERR_PTR(err);
504 } else {
505 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
506 }
1faabf2a 507
eb1d1641
HX		 508 return mp;
509}
510
cfd56754
CW		 511struct net_bridge_port_group *br_multicast_new_port_group(
512 struct net_bridge_port *port,
513 struct br_ip *group,
ccb1c31a 514 struct net_bridge_port_group __rcu *next,
6db6f0ea
FF		 515 unsigned char flags,
516 const unsigned char *src)
cfd56754
CW		 517{
518 struct net_bridge_port_group *p;
519
520 p = kzalloc(sizeof(*p), GFP_ATOMIC);
521 if (unlikely(!p))
522 return NULL;
523
524 p->addr = *group;
525 p->port = port;
9d06b6d8 526 p->flags = flags;
eca2a43b 527 rcu_assign_pointer(p->next, next);
cfd56754 528 hlist_add_head(&p->mglist, &port->mglist);
88c1f37f 529 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
6db6f0ea
FF		 530
531 if (src)
532 memcpy(p->eth_addr, src, ETH_ALEN);
533 else
534 memset(p->eth_addr, 0xff, ETH_ALEN);
535
cfd56754
CW		 536 return p;
537}
538
6db6f0ea
FF		 539static bool br_port_group_equal(struct net_bridge_port_group *p,
540 struct net_bridge_port *port,
541 const unsigned char *src)
542{
543 if (p->port != port)
544 return false;
545
546 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
547 return true;
548
549 return ether_addr_equal(src, p->eth_addr);
550}
551
eb1d1641 552static int br_multicast_add_group(struct net_bridge *br,
8ef2a9a5 553 struct net_bridge_port *port,
6db6f0ea
FF		 554 struct br_ip *group,
555 const unsigned char *src)
eb1d1641 556{
e8051688 557 struct net_bridge_port_group __rcu **pp;
5e923585
NA		 558 struct net_bridge_port_group *p;
559 struct net_bridge_mdb_entry *mp;
454594f3 560 unsigned long now = jiffies;
eb1d1641
HX		 561 int err;
562
eb1d1641
HX		 563 spin_lock(&br->multicast_lock);
564 if (!netif_running(br->dev) ||
565 (port && port->state == BR_STATE_DISABLED))
566 goto out;
567
19e3a9c9 568 mp = br_multicast_new_group(br, group);
eb1d1641 569 err = PTR_ERR(mp);
4c0833bc 570 if (IS_ERR(mp))
eb1d1641
HX		 571 goto err;
572
573 if (!port) {
2a26028d
AL		 574 if (!mp->host_joined) {
575 mp->host_joined = true;
576 br_mdb_notify(br->dev, NULL, &mp->addr, RTM_NEWMDB, 0);
577 }
454594f3 578 mod_timer(&mp->timer, now + br->multicast_membership_interval);
eb1d1641
HX		 579 goto out;
580 }
581
e8051688
ED		 582 for (pp = &mp->ports;
583 (p = mlock_dereference(*pp, br)) != NULL;
584 pp = &p->next) {
6db6f0ea 585 if (br_port_group_equal(p, port, src))
454594f3 586 goto found;
eb1d1641
HX		 587 if ((unsigned long)p->port < (unsigned long)port)
588 break;
589 }
590
6db6f0ea 591 p = br_multicast_new_port_group(port, group, *pp, 0, src);
eb1d1641
HX		 592 if (unlikely(!p))
593 goto err;
eb1d1641 594 rcu_assign_pointer(*pp, p);
45ebcce5 595 br_mdb_notify(br->dev, port, group, RTM_NEWMDB, 0);
eb1d1641 596
454594f3
LL		 597found:
598 mod_timer(&p->timer, now + br->multicast_membership_interval);
eb1d1641
HX		 599out:
600 err = 0;
601
602err:
603 spin_unlock(&br->multicast_lock);
604 return err;
605}
606
8ef2a9a5
YH		 607static int br_ip4_multicast_add_group(struct net_bridge *br,
608 struct net_bridge_port *port,
b0e9a30d 609 __be32 group,
6db6f0ea
FF		 610 __u16 vid,
611 const unsigned char *src)
8ef2a9a5
YH		 612{
613 struct br_ip br_group;
614
615 if (ipv4_is_local_multicast(group))
616 return 0;
617
618 br_group.u.ip4 = group;
619 br_group.proto = htons(ETH_P_IP);
b0e9a30d 620 br_group.vid = vid;
8ef2a9a5 621
6db6f0ea 622 return br_multicast_add_group(br, port, &br_group, src);
8ef2a9a5
YH		 623}
624
dfd56b8b 625#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 626static int br_ip6_multicast_add_group(struct net_bridge *br,
627 struct net_bridge_port *port,
b0e9a30d 628 const struct in6_addr *group,
6db6f0ea
FF		 629 __u16 vid,
630 const unsigned char *src)
08b202b6
YH		 631{
632 struct br_ip br_group;
633
3c3769e6 634 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 635 return 0;
636
19e3a9c9 637 memset(&br_group, 0, sizeof(br_group));
4e3fd7a0 638 br_group.u.ip6 = *group;
9cc6e0c4 639 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 640 br_group.vid = vid;
08b202b6 641
6db6f0ea 642 return br_multicast_add_group(br, port, &br_group, src);
08b202b6
YH		 643}
644#endif
645
88c1f37f 646static void br_multicast_router_expired(struct timer_list *t)
eb1d1641 647{
88c1f37f
AP		 648 struct net_bridge_port *port =
649 from_timer(port, t, multicast_router_timer);
eb1d1641
HX		 650 struct net_bridge *br = port->br;
651
652 spin_lock(&br->multicast_lock);
a55d8246
NA		 653 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
654 port->multicast_router == MDB_RTR_TYPE_PERM ||
f12e7d95 655 timer_pending(&port->multicast_router_timer))
eb1d1641
HX		 656 goto out;
657
f12e7d95 658 __del_port_router(port);
eb1d1641
HX		 659out:
660 spin_unlock(&br->multicast_lock);
661}
662
77041420
YG		 663static void br_mc_router_state_change(struct net_bridge *p,
664 bool is_mc_router)
665{
666 struct switchdev_attr attr = {
667 .orig_dev = p->dev,
668 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
669 .flags = SWITCHDEV_F_DEFER,
670 .u.mrouter = is_mc_router,
671 };
672
673 switchdev_port_attr_set(p->dev, &attr);
674}
675
88c1f37f 676static void br_multicast_local_router_expired(struct timer_list *t)
eb1d1641 677{
88c1f37f 678 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
77041420
YG		 679
680 spin_lock(&br->multicast_lock);
681 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
682 br->multicast_router == MDB_RTR_TYPE_PERM ||
683 timer_pending(&br->multicast_router_timer))
684 goto out;
685
686 br_mc_router_state_change(br, false);
687out:
688 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 689}
690
cc0fdd80 691static void br_multicast_querier_expired(struct net_bridge *br,
90010b36 692 struct bridge_mcast_own_query *query)
c83b8fab 693{
c83b8fab 694 spin_lock(&br->multicast_lock);
13cefad2 695 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 696 goto out;
697
cc0fdd80 698 br_multicast_start_querier(br, query);
c83b8fab
HX		 699
700out:
701 spin_unlock(&br->multicast_lock);
702}
703
88c1f37f 704static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 705{
88c1f37f 706 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
cc0fdd80 707
90010b36 708 br_multicast_querier_expired(br, &br->ip4_own_query);
cc0fdd80
LL		 709}
710
711#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 712static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 713{
88c1f37f 714 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
cc0fdd80 715
90010b36 716 br_multicast_querier_expired(br, &br->ip6_own_query);
cc0fdd80
LL		 717}
718#endif
719
dc4eb53a
LL		 720static void br_multicast_select_own_querier(struct net_bridge *br,
721 struct br_ip *ip,
722 struct sk_buff *skb)
723{
724 if (ip->proto == htons(ETH_P_IP))
725 br->ip4_querier.addr.u.ip4 = ip_hdr(skb)->saddr;
726#if IS_ENABLED(CONFIG_IPV6)
727 else
728 br->ip6_querier.addr.u.ip6 = ipv6_hdr(skb)->saddr;
729#endif
730}
731
8ef2a9a5
YH		 732static void __br_multicast_send_query(struct net_bridge *br,
733 struct net_bridge_port *port,
734 struct br_ip *ip)
eb1d1641 735{
eb1d1641 736 struct sk_buff *skb;
1080ab95 737 u8 igmp_type;
eb1d1641 738
1080ab95 739 skb = br_multicast_alloc_query(br, ip, &igmp_type);
eb1d1641 740 if (!skb)
8ef2a9a5 741 return;
eb1d1641
HX		 742
743 if (port) {
eb1d1641 744 skb->dev = port->dev;
a65056ec 745 br_multicast_count(br, port, skb, igmp_type,
1080ab95 746 BR_MCAST_DIR_TX);
29a26a56
EB		 747 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
748 dev_net(port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 749 br_dev_queue_push_xmit);
dc4eb53a
LL		 750 } else {
751 br_multicast_select_own_querier(br, ip, skb);
a65056ec 752 br_multicast_count(br, port, skb, igmp_type,
1080ab95 753 BR_MCAST_DIR_RX);
eb1d1641 754 netif_rx(skb);
dc4eb53a 755 }
8ef2a9a5
YH		 756}
757
758static void br_multicast_send_query(struct net_bridge *br,
cc0fdd80 759 struct net_bridge_port *port,
90010b36 760 struct bridge_mcast_own_query *own_query)
8ef2a9a5 761{
90010b36 762 struct bridge_mcast_other_query *other_query = NULL;
5e923585
NA		 763 struct br_ip br_group;
764 unsigned long time;
8ef2a9a5 765
13cefad2
NA		 766 if (!netif_running(br->dev) ||
767 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
675779ad 768 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
8ef2a9a5
YH		 769 return;
770
08b202b6
YH		 771 memset(&br_group.u, 0, sizeof(br_group.u));
772
90010b36
LL		 773 if (port ? (own_query == &port->ip4_own_query) :
774 (own_query == &br->ip4_own_query)) {
775 other_query = &br->ip4_other_query;
cc0fdd80 776 br_group.proto = htons(ETH_P_IP);
dfd56b8b 777#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 778 } else {
90010b36 779 other_query = &br->ip6_other_query;
cc0fdd80 780 br_group.proto = htons(ETH_P_IPV6);
08b202b6 781#endif
cc0fdd80
LL		 782 }
783
90010b36 784 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 785 return;
786
787 __br_multicast_send_query(br, port, &br_group);
eb1d1641 788
eb1d1641 789 time = jiffies;
90010b36 790 time += own_query->startup_sent < br->multicast_startup_query_count ?
eb1d1641
HX		 791 br->multicast_startup_query_interval :
792 br->multicast_query_interval;
90010b36 793 mod_timer(&own_query->timer, time);
eb1d1641
HX		 794}
795
90010b36
LL		 796static void
797br_multicast_port_query_expired(struct net_bridge_port *port,
798 struct bridge_mcast_own_query *query)
eb1d1641 799{
eb1d1641
HX		 800 struct net_bridge *br = port->br;
801
802 spin_lock(&br->multicast_lock);
02a780c0
DC		 803 if (port->state == BR_STATE_DISABLED ||
804 port->state == BR_STATE_BLOCKING)
eb1d1641
HX		 805 goto out;
806
cc0fdd80
LL		 807 if (query->startup_sent < br->multicast_startup_query_count)
808 query->startup_sent++;
eb1d1641 809
cc0fdd80 810 br_multicast_send_query(port->br, port, query);
eb1d1641
HX		 811
812out:
813 spin_unlock(&br->multicast_lock);
814}
815
88c1f37f 816static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 817{
88c1f37f 818 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
cc0fdd80 819
90010b36 820 br_multicast_port_query_expired(port, &port->ip4_own_query);
cc0fdd80
LL		 821}
822
823#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 824static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 825{
88c1f37f 826 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
cc0fdd80 827
90010b36 828 br_multicast_port_query_expired(port, &port->ip6_own_query);
cc0fdd80
LL		 829}
830#endif
831
147c1e9b
NF		 832static void br_mc_disabled_update(struct net_device *dev, bool value)
833{
834 struct switchdev_attr attr = {
835 .orig_dev = dev,
836 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
837 .flags = SWITCHDEV_F_DEFER,
13cefad2 838 .u.mc_disabled = !value,
147c1e9b
NF		 839 };
840
841 switchdev_port_attr_set(dev, &attr);
842}
843
1080ab95 844int br_multicast_add_port(struct net_bridge_port *port)
eb1d1641 845{
7f0aec7a 846 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641 847
88c1f37f
AP		 848 timer_setup(&port->multicast_router_timer,
849 br_multicast_router_expired, 0);
850 timer_setup(&port->ip4_own_query.timer,
851 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 852#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 853 timer_setup(&port->ip6_own_query.timer,
854 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 855#endif
13cefad2
NA		 856 br_mc_disabled_update(port->dev,
857 br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
147c1e9b 858
1080ab95
NA		 859 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
860 if (!port->mcast_stats)
861 return -ENOMEM;
862
863 return 0;
eb1d1641
HX		 864}
865
866void br_multicast_del_port(struct net_bridge_port *port)
867{
e10177ab
SA		 868 struct net_bridge *br = port->br;
869 struct net_bridge_port_group *pg;
870 struct hlist_node *n;
871
872 /* Take care of the remaining groups, only perm ones should be left */
873 spin_lock_bh(&br->multicast_lock);
874 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
875 br_multicast_del_pg(br, pg);
876 spin_unlock_bh(&br->multicast_lock);
eb1d1641 877 del_timer_sync(&port->multicast_router_timer);
1080ab95 878 free_percpu(port->mcast_stats);
eb1d1641
HX		 879}
880
90010b36 881static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 882{
cc0fdd80 883 query->startup_sent = 0;
561f1103 884
cc0fdd80
LL		 885 if (try_to_del_timer_sync(&query->timer) >= 0 ||
886 del_timer(&query->timer))
887 mod_timer(&query->timer, jiffies);
561f1103
HX		 888}
889
7cb3f921 890static void __br_multicast_enable_port(struct net_bridge_port *port)
eb1d1641
HX		 891{
892 struct net_bridge *br = port->br;
893
13cefad2 894 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
7cb3f921 895 return;
eb1d1641 896
90010b36 897 br_multicast_enable(&port->ip4_own_query);
cc0fdd80 898#if IS_ENABLED(CONFIG_IPV6)
90010b36 899 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 900#endif
7f0aec7a
NA		 901 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
902 hlist_unhashed(&port->rlist))
754bc547 903 br_multicast_add_router(br, port);
7cb3f921 904}
eb1d1641 905
7cb3f921
NA		 906void br_multicast_enable_port(struct net_bridge_port *port)
907{
908 struct net_bridge *br = port->br;
909
910 spin_lock(&br->multicast_lock);
911 __br_multicast_enable_port(port);
eb1d1641
HX		 912 spin_unlock(&br->multicast_lock);
913}
914
915void br_multicast_disable_port(struct net_bridge_port *port)
916{
917 struct net_bridge *br = port->br;
918 struct net_bridge_port_group *pg;
b67bfe0d 919 struct hlist_node *n;
eb1d1641
HX		 920
921 spin_lock(&br->multicast_lock);
b67bfe0d 922 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
9d06b6d8 923 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
e10177ab 924 br_multicast_del_pg(br, pg);
eb1d1641 925
f12e7d95
NF		 926 __del_port_router(port);
927
eb1d1641 928 del_timer(&port->multicast_router_timer);
90010b36 929 del_timer(&port->ip4_own_query.timer);
cc0fdd80 930#if IS_ENABLED(CONFIG_IPV6)
90010b36 931 del_timer(&port->ip6_own_query.timer);
cc0fdd80 932#endif
eb1d1641
HX		 933 spin_unlock(&br->multicast_lock);
934}
935
8ef2a9a5
YH		 936static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
937 struct net_bridge_port *port,
06499098
VY		 938 struct sk_buff *skb,
939 u16 vid)
eb1d1641 940{
6db6f0ea 941 const unsigned char *src;
eb1d1641
HX		 942 struct igmpv3_report *ih;
943 struct igmpv3_grec *grec;
944 int i;
945 int len;
946 int num;
947 int type;
948 int err = 0;
949 __be32 group;
950
eb1d1641
HX		 951 ih = igmpv3_report_hdr(skb);
952 num = ntohs(ih->ngrec);
c2d4fbd2 953 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 954
955 for (i = 0; i < num; i++) {
956 len += sizeof(*grec);
957 if (!pskb_may_pull(skb, len))
958 return -EINVAL;
959
fd218cf9 960 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 961 group = grec->grec_mca;
962 type = grec->grec_type;
963
8eabf95c 964 len += ntohs(grec->grec_nsrcs) * 4;
eb1d1641
HX		 965 if (!pskb_may_pull(skb, len))
966 return -EINVAL;
967
968 /* We treat this as an IGMPv2 report for now. */
969 switch (type) {
970 case IGMPV3_MODE_IS_INCLUDE:
971 case IGMPV3_MODE_IS_EXCLUDE:
972 case IGMPV3_CHANGE_TO_INCLUDE:
973 case IGMPV3_CHANGE_TO_EXCLUDE:
974 case IGMPV3_ALLOW_NEW_SOURCES:
975 case IGMPV3_BLOCK_OLD_SOURCES:
976 break;
977
978 default:
979 continue;
980 }
981
6db6f0ea 982 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 983 if ((type == IGMPV3_CHANGE_TO_INCLUDE ||
984 type == IGMPV3_MODE_IS_INCLUDE) &&
985 ntohs(grec->grec_nsrcs) == 0) {
6db6f0ea 986 br_ip4_multicast_leave_group(br, port, group, vid, src);
bc8c20ac 987 } else {
6db6f0ea
FF		 988 err = br_ip4_multicast_add_group(br, port, group, vid,
989 src);
bc8c20ac
SA		 990 if (err)
991 break;
992 }
eb1d1641
HX		 993 }
994
995 return err;
996}
997
dfd56b8b 998#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 999static int br_ip6_multicast_mld2_report(struct net_bridge *br,
1000 struct net_bridge_port *port,
06499098
VY		 1001 struct sk_buff *skb,
1002 u16 vid)
08b202b6 1003{
6db6f0ea 1004 const unsigned char *src;
08b202b6
YH		 1005 struct icmp6hdr *icmp6h;
1006 struct mld2_grec *grec;
1007 int i;
1008 int len;
1009 int num;
1010 int err = 0;
1011
1012 if (!pskb_may_pull(skb, sizeof(*icmp6h)))
1013 return -EINVAL;
1014
1015 icmp6h = icmp6_hdr(skb);
1016 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
c2d4fbd2 1017 len = skb_transport_offset(skb) + sizeof(*icmp6h);
08b202b6
YH		 1018
1019 for (i = 0; i < num; i++) {
1020 __be16 *nsrcs, _nsrcs;
1021
1022 nsrcs = skb_header_pointer(skb,
1023 len + offsetof(struct mld2_grec,
649e984d 1024 grec_nsrcs),
08b202b6
YH		 1025 sizeof(_nsrcs), &_nsrcs);
1026 if (!nsrcs)
1027 return -EINVAL;
1028
1029 if (!pskb_may_pull(skb,
1030 len + sizeof(*grec) +
d41db9f3 1031 sizeof(struct in6_addr) * ntohs(*nsrcs)))
08b202b6
YH		 1032 return -EINVAL;
1033
1034 grec = (struct mld2_grec *)(skb->data + len);
d41db9f3
LL		 1035 len += sizeof(*grec) +
1036 sizeof(struct in6_addr) * ntohs(*nsrcs);
08b202b6
YH		 1037
1038 /* We treat these as MLDv1 reports for now. */
1039 switch (grec->grec_type) {
1040 case MLD2_MODE_IS_INCLUDE:
1041 case MLD2_MODE_IS_EXCLUDE:
1042 case MLD2_CHANGE_TO_INCLUDE:
1043 case MLD2_CHANGE_TO_EXCLUDE:
1044 case MLD2_ALLOW_NEW_SOURCES:
1045 case MLD2_BLOCK_OLD_SOURCES:
1046 break;
1047
1048 default:
1049 continue;
1050 }
1051
6db6f0ea 1052 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 1053 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
1054 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
1055 ntohs(*nsrcs) == 0) {
1056 br_ip6_multicast_leave_group(br, port, &grec->grec_mca,
6db6f0ea 1057 vid, src);
bc8c20ac
SA		 1058 } else {
1059 err = br_ip6_multicast_add_group(br, port,
6db6f0ea
FF		 1060 &grec->grec_mca, vid,
1061 src);
9264251e 1062 if (err)
bc8c20ac
SA		 1063 break;
1064 }
08b202b6
YH		 1065 }
1066
1067 return err;
1068}
1069#endif
1070
dc4eb53a 1071static bool br_ip4_multicast_select_querier(struct net_bridge *br,
2cd41431 1072 struct net_bridge_port *port,
dc4eb53a
LL		 1073 __be32 saddr)
1074{
1075 if (!timer_pending(&br->ip4_own_query.timer) &&
1076 !timer_pending(&br->ip4_other_query.timer))
1077 goto update;
1078
1079 if (!br->ip4_querier.addr.u.ip4)
1080 goto update;
1081
1082 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.u.ip4))
1083 goto update;
1084
1085 return false;
1086
1087update:
1088 br->ip4_querier.addr.u.ip4 = saddr;
1089
2cd41431
LL		 1090 /* update protected by general multicast_lock by caller */
1091 rcu_assign_pointer(br->ip4_querier.port, port);
1092
dc4eb53a
LL		 1093 return true;
1094}
1095
1096#if IS_ENABLED(CONFIG_IPV6)
1097static bool br_ip6_multicast_select_querier(struct net_bridge *br,
2cd41431 1098 struct net_bridge_port *port,
dc4eb53a
LL		 1099 struct in6_addr *saddr)
1100{
1101 if (!timer_pending(&br->ip6_own_query.timer) &&
1102 !timer_pending(&br->ip6_other_query.timer))
1103 goto update;
1104
1105 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.u.ip6) <= 0)
1106 goto update;
1107
1108 return false;
1109
1110update:
1111 br->ip6_querier.addr.u.ip6 = *saddr;
1112
2cd41431
LL		 1113 /* update protected by general multicast_lock by caller */
1114 rcu_assign_pointer(br->ip6_querier.port, port);
1115
dc4eb53a
LL		 1116 return true;
1117}
1118#endif
1119
1120static bool br_multicast_select_querier(struct net_bridge *br,
2cd41431 1121 struct net_bridge_port *port,
dc4eb53a
LL		 1122 struct br_ip *saddr)
1123{
1124 switch (saddr->proto) {
1125 case htons(ETH_P_IP):
2cd41431 1126 return br_ip4_multicast_select_querier(br, port, saddr->u.ip4);
dc4eb53a
LL		 1127#if IS_ENABLED(CONFIG_IPV6)
1128 case htons(ETH_P_IPV6):
2cd41431 1129 return br_ip6_multicast_select_querier(br, port, &saddr->u.ip6);
dc4eb53a
LL		 1130#endif
1131 }
1132
1133 return false;
1134}
1135
cc0fdd80 1136static void
90010b36
LL		 1137br_multicast_update_query_timer(struct net_bridge *br,
1138 struct bridge_mcast_other_query *query,
1139 unsigned long max_delay)
b00589af 1140{
90010b36
LL		 1141 if (!timer_pending(&query->timer))
1142 query->delay_time = jiffies + max_delay;
b00589af 1143
90010b36 1144 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
b00589af
LL		 1145}
1146
6d549648
NF		 1147static void br_port_mc_router_state_change(struct net_bridge_port *p,
1148 bool is_mc_router)
1149{
1150 struct switchdev_attr attr = {
1151 .orig_dev = p->dev,
1152 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
1153 .flags = SWITCHDEV_F_DEFER,
1154 .u.mrouter = is_mc_router,
1155 };
1156
1157 switchdev_port_attr_set(p->dev, &attr);
1158}
1159
7e80c124 1160/*
7c77602f 1161 * Add port to router_list
7e80c124 1162 * list is maintained ordered by pointer value
1163 * and locked by br->multicast_lock and RCU
1164 */
0909e117
HX		 1165static void br_multicast_add_router(struct net_bridge *br,
1166 struct net_bridge_port *port)
1167{
dcdca2c4 1168 struct net_bridge_port *p;
b67bfe0d 1169 struct hlist_node *slot = NULL;
dcdca2c4 1170
1a040eac
NA		 1171 if (!hlist_unhashed(&port->rlist))
1172 return;
1173
b67bfe0d 1174 hlist_for_each_entry(p, &br->router_list, rlist) {
7e80c124 1175 if ((unsigned long) port >= (unsigned long) p)
1176 break;
b67bfe0d 1177 slot = &p->rlist;
dcdca2c4 1178 }
1179
7e80c124 1180 if (slot)
1d023284 1181 hlist_add_behind_rcu(&port->rlist, slot);
dcdca2c4 1182 else
1183 hlist_add_head_rcu(&port->rlist, &br->router_list);
949f1e39 1184 br_rtr_notify(br->dev, port, RTM_NEWMDB);
6d549648 1185 br_port_mc_router_state_change(port, true);
0909e117
HX		 1186}
1187
eb1d1641
HX		 1188static void br_multicast_mark_router(struct net_bridge *br,
1189 struct net_bridge_port *port)
1190{
1191 unsigned long now = jiffies;
eb1d1641
HX		 1192
1193 if (!port) {
77041420
YG		 1194 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
1195 if (!timer_pending(&br->multicast_router_timer))
1196 br_mc_router_state_change(br, true);
eb1d1641
HX		 1197 mod_timer(&br->multicast_router_timer,
1198 now + br->multicast_querier_interval);
77041420 1199 }
eb1d1641
HX		 1200 return;
1201 }
1202
a55d8246
NA		 1203 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1204 port->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 1205 return;
1206
0909e117 1207 br_multicast_add_router(br, port);
eb1d1641 1208
eb1d1641
HX		 1209 mod_timer(&port->multicast_router_timer,
1210 now + br->multicast_querier_interval);
1211}
1212
1213static void br_multicast_query_received(struct net_bridge *br,
1214 struct net_bridge_port *port,
90010b36 1215 struct bridge_mcast_other_query *query,
dc4eb53a 1216 struct br_ip *saddr,
b00589af 1217 unsigned long max_delay)
eb1d1641 1218{
2cd41431 1219 if (!br_multicast_select_querier(br, port, saddr))
eb1d1641
HX		 1220 return;
1221
dc4eb53a 1222 br_multicast_update_query_timer(br, query, max_delay);
5a2de63f
HL		 1223
1224 /* Based on RFC4541, section 2.1.1 IGMP Forwarding Rules,
1225 * the arrival port for IGMP Queries where the source address
1226 * is 0.0.0.0 should not be added to router port list.
1227 */
1228 if ((saddr->proto == htons(ETH_P_IP) && saddr->u.ip4) ||
0fe5119e 1229 saddr->proto == htons(ETH_P_IPV6))
5a2de63f 1230 br_multicast_mark_router(br, port);
eb1d1641
HX		 1231}
1232
9c2e955c 1233static void br_ip4_multicast_query(struct net_bridge *br,
1234 struct net_bridge_port *port,
1235 struct sk_buff *skb,
1236 u16 vid)
eb1d1641 1237{
b71d1d42 1238 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 1239 struct igmphdr *ih = igmp_hdr(skb);
1240 struct net_bridge_mdb_entry *mp;
1241 struct igmpv3_query *ih3;
1242 struct net_bridge_port_group *p;
e8051688 1243 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1244 struct br_ip saddr;
eb1d1641
HX		 1245 unsigned long max_delay;
1246 unsigned long now = jiffies;
856ce5d0 1247 unsigned int offset = skb_transport_offset(skb);
eb1d1641
HX		 1248 __be32 group;
1249
1250 spin_lock(&br->multicast_lock);
1251 if (!netif_running(br->dev) ||
1252 (port && port->state == BR_STATE_DISABLED))
1253 goto out;
1254
eb1d1641
HX		 1255 group = ih->group;
1256
856ce5d0 1257 if (skb->len == offset + sizeof(*ih)) {
eb1d1641
HX		 1258 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
1259
1260 if (!max_delay) {
1261 max_delay = 10 * HZ;
1262 group = 0;
1263 }
856ce5d0 1264 } else if (skb->len >= offset + sizeof(*ih3)) {
eb1d1641
HX		 1265 ih3 = igmpv3_query_hdr(skb);
1266 if (ih3->nsrcs)
bec68ff1 1267 goto out;
eb1d1641 1268
0ba8c9ec
YH		 1269 max_delay = ih3->code ?
1270 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 1271 } else {
9ed973cc
LL		 1272 goto out;
1273 }
1274
dc4eb53a
LL		 1275 if (!group) {
1276 saddr.proto = htons(ETH_P_IP);
1277 saddr.u.ip4 = iph->saddr;
b00589af 1278
dc4eb53a
LL		 1279 br_multicast_query_received(br, port, &br->ip4_other_query,
1280 &saddr, max_delay);
eb1d1641 1281 goto out;
dc4eb53a 1282 }
eb1d1641 1283
19e3a9c9 1284 mp = br_mdb_ip4_get(br, group, vid);
eb1d1641
HX		 1285 if (!mp)
1286 goto out;
1287
1288 max_delay *= br->multicast_last_member_count;
1289
ff0fd34e 1290 if (mp->host_joined &&
eb1d1641
HX		 1291 (timer_pending(&mp->timer) ?
1292 time_after(mp->timer.expires, now + max_delay) :
1293 try_to_del_timer_sync(&mp->timer) >= 0))
1294 mod_timer(&mp->timer, now + max_delay);
1295
e8051688
ED		 1296 for (pp = &mp->ports;
1297 (p = mlock_dereference(*pp, br)) != NULL;
1298 pp = &p->next) {
eb1d1641
HX		 1299 if (timer_pending(&p->timer) ?
1300 time_after(p->timer.expires, now + max_delay) :
1301 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1302 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 1303 }
1304
1305out:
1306 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 1307}
1308
dfd56b8b 1309#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1310static int br_ip6_multicast_query(struct net_bridge *br,
1311 struct net_bridge_port *port,
06499098
VY		 1312 struct sk_buff *skb,
1313 u16 vid)
08b202b6 1314{
b71d1d42 1315 const struct ipv6hdr *ip6h = ipv6_hdr(skb);
eca2a43b 1316 struct mld_msg *mld;
08b202b6
YH		 1317 struct net_bridge_mdb_entry *mp;
1318 struct mld2_query *mld2q;
e8051688
ED		 1319 struct net_bridge_port_group *p;
1320 struct net_bridge_port_group __rcu **pp;
dc4eb53a 1321 struct br_ip saddr;
08b202b6
YH		 1322 unsigned long max_delay;
1323 unsigned long now = jiffies;
856ce5d0 1324 unsigned int offset = skb_transport_offset(skb);
b71d1d42 1325 const struct in6_addr *group = NULL;
9ed973cc 1326 bool is_general_query;
08b202b6
YH		 1327 int err = 0;
1328
1329 spin_lock(&br->multicast_lock);
1330 if (!netif_running(br->dev) ||
1331 (port && port->state == BR_STATE_DISABLED))
1332 goto out;
1333
856ce5d0
LL		 1334 if (skb->len == offset + sizeof(*mld)) {
1335 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 1336 err = -EINVAL;
1337 goto out;
1338 }
1339 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 1340 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 1341 if (max_delay)
1342 group = &mld->mld_mca;
248ba8ec 1343 } else {
856ce5d0 1344 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 1345 err = -EINVAL;
1346 goto out;
1347 }
1348 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1349 if (!mld2q->mld2q_nsrcs)
1350 group = &mld2q->mld2q_mca;
e3f5b170
DB		 1351
1352 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 1353 }
1354
9ed973cc
LL		 1355 is_general_query = group && ipv6_addr_any(group);
1356
dc4eb53a
LL		 1357 if (is_general_query) {
1358 saddr.proto = htons(ETH_P_IPV6);
1359 saddr.u.ip6 = ip6h->saddr;
b00589af 1360
dc4eb53a
LL		 1361 br_multicast_query_received(br, port, &br->ip6_other_query,
1362 &saddr, max_delay);
08b202b6 1363 goto out;
6c03ee8b
LL		 1364 } else if (!group) {
1365 goto out;
dc4eb53a 1366 }
08b202b6 1367
19e3a9c9 1368 mp = br_mdb_ip6_get(br, group, vid);
08b202b6
YH		 1369 if (!mp)
1370 goto out;
1371
1372 max_delay *= br->multicast_last_member_count;
ff0fd34e 1373 if (mp->host_joined &&
08b202b6
YH		 1374 (timer_pending(&mp->timer) ?
1375 time_after(mp->timer.expires, now + max_delay) :
1376 try_to_del_timer_sync(&mp->timer) >= 0))
1377 mod_timer(&mp->timer, now + max_delay);
1378
e8051688
ED		 1379 for (pp = &mp->ports;
1380 (p = mlock_dereference(*pp, br)) != NULL;
1381 pp = &p->next) {
08b202b6
YH		 1382 if (timer_pending(&p->timer) ?
1383 time_after(p->timer.expires, now + max_delay) :
1384 try_to_del_timer_sync(&p->timer) >= 0)
24f9cdcb 1385 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 1386 }
1387
1388out:
1389 spin_unlock(&br->multicast_lock);
1390 return err;
1391}
1392#endif
1393
90010b36
LL		 1394static void
1395br_multicast_leave_group(struct net_bridge *br,
1396 struct net_bridge_port *port,
1397 struct br_ip *group,
1398 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 1399 struct bridge_mcast_own_query *own_query,
1400 const unsigned char *src)
eb1d1641 1401{
eb1d1641
HX		 1402 struct net_bridge_mdb_entry *mp;
1403 struct net_bridge_port_group *p;
1404 unsigned long now;
1405 unsigned long time;
1406
eb1d1641
HX		 1407 spin_lock(&br->multicast_lock);
1408 if (!netif_running(br->dev) ||
544586f7 1409 (port && port->state == BR_STATE_DISABLED))
eb1d1641
HX		 1410 goto out;
1411
19e3a9c9 1412 mp = br_mdb_ip_get(br, group);
eb1d1641
HX		 1413 if (!mp)
1414 goto out;
1415
544586f7
SA		 1416 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
1417 struct net_bridge_port_group __rcu **pp;
1418
1419 for (pp = &mp->ports;
1420 (p = mlock_dereference(*pp, br)) != NULL;
1421 pp = &p->next) {
6db6f0ea 1422 if (!br_port_group_equal(p, port, src))
544586f7
SA		 1423 continue;
1424
1425 rcu_assign_pointer(*pp, p->next);
1426 hlist_del_init(&p->mglist);
1427 del_timer(&p->timer);
1428 call_rcu_bh(&p->rcu, br_multicast_free_pg);
45ebcce5
ER		 1429 br_mdb_notify(br->dev, port, group, RTM_DELMDB,
1430 p->flags);
544586f7 1431
ff0fd34e 1432 if (!mp->ports && !mp->host_joined &&
544586f7
SA		 1433 netif_running(br->dev))
1434 mod_timer(&mp->timer, jiffies);
1435 }
1436 goto out;
1437 }
1438
1439 if (timer_pending(&other_query->timer))
1440 goto out;
1441
675779ad 1442 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
6b7df111
CW		 1443 __br_multicast_send_query(br, port, &mp->addr);
1444
1445 time = jiffies + br->multicast_last_member_count *
1446 br->multicast_last_member_interval;
cc0fdd80 1447
90010b36 1448 mod_timer(&own_query->timer, time);
6b7df111
CW		 1449
1450 for (p = mlock_dereference(mp->ports, br);
1451 p != NULL;
1452 p = mlock_dereference(p->next, br)) {
6db6f0ea 1453 if (!br_port_group_equal(p, port, src))
6b7df111
CW		 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;
1464 }
1465 }
1466
eb1d1641
HX		 1467 now = jiffies;
1468 time = now + br->multicast_last_member_count *
1469 br->multicast_last_member_interval;
1470
1471 if (!port) {
ff0fd34e 1472 if (mp->host_joined &&
eb1d1641
HX		 1473 (timer_pending(&mp->timer) ?
1474 time_after(mp->timer.expires, time) :
1475 try_to_del_timer_sync(&mp->timer) >= 0)) {
1476 mod_timer(&mp->timer, time);
eb1d1641 1477 }
454594f3
LL		 1478
1479 goto out;
1480 }
1481
1482 for (p = mlock_dereference(mp->ports, br);
1483 p != NULL;
1484 p = mlock_dereference(p->next, br)) {
1485 if (p->port != port)
1486 continue;
1487
1488 if (!hlist_unhashed(&p->mglist) &&
1489 (timer_pending(&p->timer) ?
1490 time_after(p->timer.expires, time) :
1491 try_to_del_timer_sync(&p->timer) >= 0)) {
1492 mod_timer(&p->timer, time);
1493 }
1494
1495 break;
eb1d1641 1496 }
eb1d1641
HX		 1497out:
1498 spin_unlock(&br->multicast_lock);
1499}
1500
8ef2a9a5
YH		 1501static void br_ip4_multicast_leave_group(struct net_bridge *br,
1502 struct net_bridge_port *port,
b0e9a30d 1503 __be32 group,
6db6f0ea
FF		 1504 __u16 vid,
1505 const unsigned char *src)
8ef2a9a5
YH		 1506{
1507 struct br_ip br_group;
90010b36 1508 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 1509
1510 if (ipv4_is_local_multicast(group))
1511 return;
1512
90010b36
LL		 1513 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
1514
8ef2a9a5
YH		 1515 br_group.u.ip4 = group;
1516 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1517 br_group.vid = vid;
8ef2a9a5 1518
90010b36 1519 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
6db6f0ea 1520 own_query, src);
8ef2a9a5
YH		 1521}
1522
dfd56b8b 1523#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1524static void br_ip6_multicast_leave_group(struct net_bridge *br,
1525 struct net_bridge_port *port,
b0e9a30d 1526 const struct in6_addr *group,
6db6f0ea
FF		 1527 __u16 vid,
1528 const unsigned char *src)
08b202b6
YH		 1529{
1530 struct br_ip br_group;
90010b36 1531 struct bridge_mcast_own_query *own_query;
08b202b6 1532
3c3769e6 1533 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1534 return;
1535
90010b36
LL		 1536 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
1537
4e3fd7a0 1538 br_group.u.ip6 = *group;
08b202b6 1539 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1540 br_group.vid = vid;
08b202b6 1541
90010b36 1542 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
6db6f0ea 1543 own_query, src);
08b202b6
YH		 1544}
1545#endif
8ef2a9a5 1546
1080ab95
NA		 1547static void br_multicast_err_count(const struct net_bridge *br,
1548 const struct net_bridge_port *p,
1549 __be16 proto)
1550{
1551 struct bridge_mcast_stats __percpu *stats;
1552 struct bridge_mcast_stats *pstats;
1553
675779ad 1554 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 1555 return;
1556
1557 if (p)
1558 stats = p->mcast_stats;
1559 else
1560 stats = br->mcast_stats;
1561 if (WARN_ON(!stats))
1562 return;
1563
1564 pstats = this_cpu_ptr(stats);
1565
1566 u64_stats_update_begin(&pstats->syncp);
1567 switch (proto) {
1568 case htons(ETH_P_IP):
1569 pstats->mstats.igmp_parse_errors++;
1570 break;
1571#if IS_ENABLED(CONFIG_IPV6)
1572 case htons(ETH_P_IPV6):
1573 pstats->mstats.mld_parse_errors++;
1574 break;
1575#endif
1576 }
1577 u64_stats_update_end(&pstats->syncp);
1578}
1579
91b02d3d
NA		 1580static void br_multicast_pim(struct net_bridge *br,
1581 struct net_bridge_port *port,
1582 const struct sk_buff *skb)
1583{
1584 unsigned int offset = skb_transport_offset(skb);
1585 struct pimhdr *pimhdr, _pimhdr;
1586
1587 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
1588 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
1589 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
1590 return;
1591
1592 br_multicast_mark_router(br, port);
1593}
1594
eb1d1641
HX		 1595static int br_multicast_ipv4_rcv(struct net_bridge *br,
1596 struct net_bridge_port *port,
06499098
VY		 1597 struct sk_buff *skb,
1598 u16 vid)
eb1d1641 1599{
9afd85c9 1600 struct sk_buff *skb_trimmed = NULL;
6db6f0ea 1601 const unsigned char *src;
eb1d1641 1602 struct igmphdr *ih;
eb1d1641
HX		 1603 int err;
1604
9afd85c9 1605 err = ip_mc_check_igmp(skb, &skb_trimmed);
eb1d1641 1606
9afd85c9 1607 if (err == -ENOMSG) {
91b02d3d 1608 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 1609 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 1610 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
1611 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
1612 br_multicast_pim(br, port, skb);
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:
9afd85c9 1631 err = br_ip4_multicast_igmp3_report(br, port, skb_trimmed, vid);
eb1d1641
HX		 1632 break;
1633 case IGMP_HOST_MEMBERSHIP_QUERY:
9c2e955c 1634 br_ip4_multicast_query(br, port, skb_trimmed, 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
a516993f 1641 if (skb_trimmed && skb_trimmed != skb)
9afd85c9
LL		 1642 kfree_skb(skb_trimmed);
1643
a65056ec 1644 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1645 BR_MCAST_DIR_RX);
1646
eb1d1641
HX		 1647 return err;
1648}
1649
dfd56b8b 1650#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1651static int br_multicast_ipv6_rcv(struct net_bridge *br,
1652 struct net_bridge_port *port,
06499098
VY		 1653 struct sk_buff *skb,
1654 u16 vid)
08b202b6 1655{
9afd85c9 1656 struct sk_buff *skb_trimmed = NULL;
6db6f0ea 1657 const unsigned char *src;
9afd85c9 1658 struct mld_msg *mld;
08b202b6
YH		 1659 int err;
1660
9afd85c9 1661 err = ipv6_mc_check_mld(skb, &skb_trimmed);
08b202b6 1662
9afd85c9
LL		 1663 if (err == -ENOMSG) {
1664 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
1665 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
08b202b6 1666 return 0;
9afd85c9 1667 } else if (err < 0) {
1080ab95 1668 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 1669 return err;
08b202b6
YH		 1670 }
1671
9afd85c9 1672 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 1673 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 1674
9afd85c9 1675 switch (mld->mld_type) {
08b202b6 1676 case ICMPV6_MGM_REPORT:
6db6f0ea 1677 src = eth_hdr(skb)->h_source;
fc2af6c7 1678 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
6db6f0ea
FF		 1679 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
1680 src);
08b202b6 1681 break;
08b202b6 1682 case ICMPV6_MLD2_REPORT:
9afd85c9 1683 err = br_ip6_multicast_mld2_report(br, port, skb_trimmed, vid);
08b202b6
YH		 1684 break;
1685 case ICMPV6_MGM_QUERY:
9afd85c9 1686 err = br_ip6_multicast_query(br, port, skb_trimmed, vid);
08b202b6
YH		 1687 break;
1688 case ICMPV6_MGM_REDUCTION:
6db6f0ea
FF		 1689 src = eth_hdr(skb)->h_source;
1690 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
9afd85c9 1691 break;
08b202b6
YH		 1692 }
1693
a516993f 1694 if (skb_trimmed && skb_trimmed != skb)
9afd85c9
LL		 1695 kfree_skb(skb_trimmed);
1696
a65056ec 1697 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 1698 BR_MCAST_DIR_RX);
1699
08b202b6
YH		 1700 return err;
1701}
1702#endif
1703
eb1d1641 1704int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
06499098 1705 struct sk_buff *skb, u16 vid)
eb1d1641 1706{
1080ab95
NA		 1707 int ret = 0;
1708
1fafc7a9
YH		 1709 BR_INPUT_SKB_CB(skb)->igmp = 0;
1710 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
1711
13cefad2 1712 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 1713 return 0;
1714
1715 switch (skb->protocol) {
1716 case htons(ETH_P_IP):
1080ab95
NA		 1717 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
1718 break;
dfd56b8b 1719#if IS_ENABLED(CONFIG_IPV6)
08b202b6 1720 case htons(ETH_P_IPV6):
1080ab95
NA		 1721 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
1722 break;
08b202b6 1723#endif
eb1d1641
HX		 1724 }
1725
1080ab95 1726 return ret;
eb1d1641
HX		 1727}
1728
cc0fdd80 1729static void br_multicast_query_expired(struct net_bridge *br,
2cd41431
LL		 1730 struct bridge_mcast_own_query *query,
1731 struct bridge_mcast_querier *querier)
cc0fdd80
LL		 1732{
1733 spin_lock(&br->multicast_lock);
1734 if (query->startup_sent < br->multicast_startup_query_count)
1735 query->startup_sent++;
1736
71d9f614 1737 RCU_INIT_POINTER(querier->port, NULL);
cc0fdd80
LL		 1738 br_multicast_send_query(br, NULL, query);
1739 spin_unlock(&br->multicast_lock);
1740}
1741
88c1f37f 1742static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 1743{
88c1f37f 1744 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
eb1d1641 1745
2cd41431 1746 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
cc0fdd80 1747}
eb1d1641 1748
cc0fdd80 1749#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1750static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 1751{
88c1f37f 1752 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
eb1d1641 1753
2cd41431 1754 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
eb1d1641 1755}
cc0fdd80 1756#endif
eb1d1641
HX		 1757
1758void br_multicast_init(struct net_bridge *br)
1759{
1760 br->hash_elasticity = 4;
1761 br->hash_max = 512;
1762
7f0aec7a 1763 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641
HX		 1764 br->multicast_last_member_count = 2;
1765 br->multicast_startup_query_count = 2;
1766
1767 br->multicast_last_member_interval = HZ;
1768 br->multicast_query_response_interval = 10 * HZ;
1769 br->multicast_startup_query_interval = 125 * HZ / 4;
1770 br->multicast_query_interval = 125 * HZ;
1771 br->multicast_querier_interval = 255 * HZ;
1772 br->multicast_membership_interval = 260 * HZ;
1773
90010b36 1774 br->ip4_other_query.delay_time = 0;
2cd41431 1775 br->ip4_querier.port = NULL;
aa2ae3e7 1776 br->multicast_igmp_version = 2;
cc0fdd80 1777#if IS_ENABLED(CONFIG_IPV6)
aa2ae3e7 1778 br->multicast_mld_version = 1;
90010b36 1779 br->ip6_other_query.delay_time = 0;
2cd41431 1780 br->ip6_querier.port = NULL;
cc0fdd80 1781#endif
6919622a 1782 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
675779ad 1783 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
b00589af 1784
eb1d1641 1785 spin_lock_init(&br->multicast_lock);
88c1f37f
AP		 1786 timer_setup(&br->multicast_router_timer,
1787 br_multicast_local_router_expired, 0);
1788 timer_setup(&br->ip4_other_query.timer,
1789 br_ip4_multicast_querier_expired, 0);
1790 timer_setup(&br->ip4_own_query.timer,
1791 br_ip4_multicast_query_expired, 0);
cc0fdd80 1792#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 1793 timer_setup(&br->ip6_other_query.timer,
1794 br_ip6_multicast_querier_expired, 0);
1795 timer_setup(&br->ip6_own_query.timer,
1796 br_ip6_multicast_query_expired, 0);
cc0fdd80 1797#endif
19e3a9c9 1798 INIT_HLIST_HEAD(&br->mdb_list);
eb1d1641
HX		 1799}
1800
cc0fdd80 1801static void __br_multicast_open(struct net_bridge *br,
90010b36 1802 struct bridge_mcast_own_query *query)
eb1d1641 1803{
cc0fdd80 1804 query->startup_sent = 0;
eb1d1641 1805
13cefad2 1806 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 1807 return;
1808
cc0fdd80
LL		 1809 mod_timer(&query->timer, jiffies);
1810}
1811
1812void br_multicast_open(struct net_bridge *br)
1813{
90010b36 1814 __br_multicast_open(br, &br->ip4_own_query);
cc0fdd80 1815#if IS_ENABLED(CONFIG_IPV6)
90010b36 1816 __br_multicast_open(br, &br->ip6_own_query);
cc0fdd80 1817#endif
eb1d1641
HX		 1818}
1819
1820void br_multicast_stop(struct net_bridge *br)
1821{
eb1d1641 1822 del_timer_sync(&br->multicast_router_timer);
90010b36
LL		 1823 del_timer_sync(&br->ip4_other_query.timer);
1824 del_timer_sync(&br->ip4_own_query.timer);
cc0fdd80 1825#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 1826 del_timer_sync(&br->ip6_other_query.timer);
1827 del_timer_sync(&br->ip6_own_query.timer);
cc0fdd80 1828#endif
e10177ab
SA		 1829}
1830
1831void br_multicast_dev_del(struct net_bridge *br)
1832{
e10177ab 1833 struct net_bridge_mdb_entry *mp;
19e3a9c9 1834 struct hlist_node *tmp;
eb1d1641
HX		 1835
1836 spin_lock_bh(&br->multicast_lock);
19e3a9c9
NA		 1837 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node) {
1838 del_timer(&mp->timer);
1839 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
1840 br_mdb_rht_params);
1841 hlist_del_rcu(&mp->mdb_node);
1842 call_rcu_bh(&mp->rcu, br_multicast_free_group);
eb1d1641 1843 }
eb1d1641 1844 spin_unlock_bh(&br->multicast_lock);
19e3a9c9
NA		 1845
1846 rcu_barrier_bh();
eb1d1641 1847}
0909e117
HX		 1848
1849int br_multicast_set_router(struct net_bridge *br, unsigned long val)
1850{
6ae4ae8e 1851 int err = -EINVAL;
0909e117
HX		 1852
1853 spin_lock_bh(&br->multicast_lock);
0909e117
HX		 1854
1855 switch (val) {
7f0aec7a
NA		 1856 case MDB_RTR_TYPE_DISABLED:
1857 case MDB_RTR_TYPE_PERM:
77041420 1858 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
0909e117 1859 del_timer(&br->multicast_router_timer);
77041420
YG		 1860 br->multicast_router = val;
1861 err = 0;
1862 break;
7f0aec7a 1863 case MDB_RTR_TYPE_TEMP_QUERY:
77041420
YG		 1864 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
1865 br_mc_router_state_change(br, false);
0909e117
HX		 1866 br->multicast_router = val;
1867 err = 0;
1868 break;
0909e117
HX		 1869 }
1870
0909e117
HX		 1871 spin_unlock_bh(&br->multicast_lock);
1872
1873 return err;
1874}
1875
7f0aec7a
NA		 1876static void __del_port_router(struct net_bridge_port *p)
1877{
1878 if (hlist_unhashed(&p->rlist))
1879 return;
1880 hlist_del_init_rcu(&p->rlist);
1881 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
6d549648 1882 br_port_mc_router_state_change(p, false);
f12e7d95
NF		 1883
1884 /* don't allow timer refresh */
1885 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
1886 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 1887}
1888
0909e117
HX		 1889int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
1890{
1891 struct net_bridge *br = p->br;
a55d8246 1892 unsigned long now = jiffies;
6ae4ae8e 1893 int err = -EINVAL;
0909e117
HX		 1894
1895 spin_lock(&br->multicast_lock);
4950cfd1 1896 if (p->multicast_router == val) {
a55d8246
NA		 1897 /* Refresh the temp router port timer */
1898 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
1899 mod_timer(&p->multicast_router_timer,
1900 now + br->multicast_querier_interval);
4950cfd1
NA		 1901 err = 0;
1902 goto unlock;
1903 }
0909e117 1904 switch (val) {
7f0aec7a
NA		 1905 case MDB_RTR_TYPE_DISABLED:
1906 p->multicast_router = MDB_RTR_TYPE_DISABLED;
1907 __del_port_router(p);
1908 del_timer(&p->multicast_router_timer);
1909 break;
1910 case MDB_RTR_TYPE_TEMP_QUERY:
1911 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1912 __del_port_router(p);
1913 break;
1914 case MDB_RTR_TYPE_PERM:
1915 p->multicast_router = MDB_RTR_TYPE_PERM;
0909e117 1916 del_timer(&p->multicast_router_timer);
0909e117
HX		 1917 br_multicast_add_router(br, p);
1918 break;
a55d8246
NA		 1919 case MDB_RTR_TYPE_TEMP:
1920 p->multicast_router = MDB_RTR_TYPE_TEMP;
1921 br_multicast_mark_router(br, p);
1922 break;
7f0aec7a
NA		 1923 default:
1924 goto unlock;
0909e117 1925 }
7f0aec7a
NA		 1926 err = 0;
1927unlock:
0909e117
HX		 1928 spin_unlock(&br->multicast_lock);
1929
1930 return err;
1931}
561f1103 1932
cc0fdd80 1933static void br_multicast_start_querier(struct net_bridge *br,
90010b36 1934 struct bridge_mcast_own_query *query)
561f1103
HX		 1935{
1936 struct net_bridge_port *port;
74857216 1937
cc0fdd80 1938 __br_multicast_open(br, query);
74857216
HX		 1939
1940 list_for_each_entry(port, &br->port_list, list) {
1941 if (port->state == BR_STATE_DISABLED ||
1942 port->state == BR_STATE_BLOCKING)
1943 continue;
1944
90010b36
LL		 1945 if (query == &br->ip4_own_query)
1946 br_multicast_enable(&port->ip4_own_query);
cc0fdd80
LL		 1947#if IS_ENABLED(CONFIG_IPV6)
1948 else
90010b36 1949 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 1950#endif
74857216
HX		 1951 }
1952}
1953
1954int br_multicast_toggle(struct net_bridge *br, unsigned long val)
1955{
7cb3f921
NA		 1956 struct net_bridge_port *port;
1957 int err = 0;
561f1103 1958
ef5e0d82 1959 spin_lock_bh(&br->multicast_lock);
13cefad2 1960 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 1961 goto unlock;
1962
13cefad2
NA		 1963 br_mc_disabled_update(br->dev, val);
1964 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
1965 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
561f1103
HX		 1966 goto unlock;
1967
3a7fda06
HX		 1968 if (!netif_running(br->dev))
1969 goto unlock;
1970
7cb3f921
NA		 1971 br_multicast_open(br);
1972 list_for_each_entry(port, &br->port_list, list)
1973 __br_multicast_enable_port(port);
561f1103
HX		 1974
1975unlock:
ef5e0d82 1976 spin_unlock_bh(&br->multicast_lock);
561f1103
HX		 1977
1978 return err;
1979}
b195167f 1980
9341b988
IS		 1981bool br_multicast_enabled(const struct net_device *dev)
1982{
1983 struct net_bridge *br = netdev_priv(dev);
1984
13cefad2 1985 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 1986}
1987EXPORT_SYMBOL_GPL(br_multicast_enabled);
1988
0912bda4
YG		 1989bool br_multicast_router(const struct net_device *dev)
1990{
1991 struct net_bridge *br = netdev_priv(dev);
1992 bool is_router;
1993
1994 spin_lock_bh(&br->multicast_lock);
1995 is_router = br_multicast_is_router(br);
1996 spin_unlock_bh(&br->multicast_lock);
1997 return is_router;
1998}
1999EXPORT_SYMBOL_GPL(br_multicast_router);
2000
c5c23260
HX		 2001int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
2002{
b00589af
LL		 2003 unsigned long max_delay;
2004
c5c23260
HX		 2005 val = !!val;
2006
2007 spin_lock_bh(&br->multicast_lock);
675779ad 2008 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
c5c23260
HX		 2009 goto unlock;
2010
675779ad 2011 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
b00589af
LL		 2012 if (!val)
2013 goto unlock;
2014
2015 max_delay = br->multicast_query_response_interval;
b00589af 2016
90010b36
LL		 2017 if (!timer_pending(&br->ip4_other_query.timer))
2018 br->ip4_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2019
90010b36 2020 br_multicast_start_querier(br, &br->ip4_own_query);
cc0fdd80
LL		 2021
2022#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 2023 if (!timer_pending(&br->ip6_other_query.timer))
2024 br->ip6_other_query.delay_time = jiffies + max_delay;
cc0fdd80 2025
90010b36 2026 br_multicast_start_querier(br, &br->ip6_own_query);
cc0fdd80 2027#endif
c5c23260
HX		 2028
2029unlock:
2030 spin_unlock_bh(&br->multicast_lock);
2031
2032 return 0;
2033}
2034
5e923585
NA		 2035int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
2036{
2037 /* Currently we support only version 2 and 3 */
2038 switch (val) {
2039 case 2:
2040 case 3:
2041 break;
2042 default:
2043 return -EINVAL;
2044 }
2045
2046 spin_lock_bh(&br->multicast_lock);
2047 br->multicast_igmp_version = val;
2048 spin_unlock_bh(&br->multicast_lock);
2049
2050 return 0;
2051}
2052
aa2ae3e7
NA		 2053#if IS_ENABLED(CONFIG_IPV6)
2054int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
2055{
2056 /* Currently we support version 1 and 2 */
2057 switch (val) {
2058 case 1:
2059 case 2:
2060 break;
2061 default:
2062 return -EINVAL;
2063 }
2064
2065 spin_lock_bh(&br->multicast_lock);
2066 br->multicast_mld_version = val;
2067 spin_unlock_bh(&br->multicast_lock);
2068
2069 return 0;
2070}
2071#endif
2072
07f8ac4a
LL		 2073/**
2074 * br_multicast_list_adjacent - Returns snooped multicast addresses
2075 * @dev: The bridge port adjacent to which to retrieve addresses
2076 * @br_ip_list: The list to store found, snooped multicast IP addresses in
2077 *
2078 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
2079 * snooping feature on all bridge ports of dev's bridge device, excluding
2080 * the addresses from dev itself.
2081 *
2082 * Returns the number of items added to br_ip_list.
2083 *
2084 * Notes:
2085 * - br_ip_list needs to be initialized by caller
2086 * - br_ip_list might contain duplicates in the end
2087 * (needs to be taken care of by caller)
2088 * - br_ip_list needs to be freed by caller
2089 */
2090int br_multicast_list_adjacent(struct net_device *dev,
2091 struct list_head *br_ip_list)
2092{
2093 struct net_bridge *br;
2094 struct net_bridge_port *port;
2095 struct net_bridge_port_group *group;
2096 struct br_ip_list *entry;
2097 int count = 0;
2098
2099 rcu_read_lock();
2100 if (!br_ip_list || !br_port_exists(dev))
2101 goto unlock;
2102
2103 port = br_port_get_rcu(dev);
2104 if (!port || !port->br)
2105 goto unlock;
2106
2107 br = port->br;
2108
2109 list_for_each_entry_rcu(port, &br->port_list, list) {
2110 if (!port->dev || port->dev == dev)
2111 continue;
2112
2113 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
2114 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
2115 if (!entry)
2116 goto unlock;
2117
2118 entry->addr = group->addr;
2119 list_add(&entry->list, br_ip_list);
2120 count++;
2121 }
2122 }
2123
2124unlock:
2125 rcu_read_unlock();
2126 return count;
2127}
2128EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2cd41431 2129
c34963e2
LL		 2130/**
2131 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
2132 * @dev: The bridge port providing the bridge on which to check for a querier
2133 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2134 *
2135 * Checks whether the given interface has a bridge on top and if so returns
2136 * true if a valid querier exists anywhere on the bridged link layer.
2137 * Otherwise returns false.
2138 */
2139bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
2140{
2141 struct net_bridge *br;
2142 struct net_bridge_port *port;
2143 struct ethhdr eth;
2144 bool ret = false;
2145
2146 rcu_read_lock();
2147 if (!br_port_exists(dev))
2148 goto unlock;
2149
2150 port = br_port_get_rcu(dev);
2151 if (!port || !port->br)
2152 goto unlock;
2153
2154 br = port->br;
2155
2156 memset(&eth, 0, sizeof(eth));
2157 eth.h_proto = htons(proto);
2158
2159 ret = br_multicast_querier_exists(br, &eth);
2160
2161unlock:
2162 rcu_read_unlock();
2163 return ret;
2164}
2165EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
2166
2cd41431
LL		 2167/**
2168 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
2169 * @dev: The bridge port adjacent to which to check for a querier
2170 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
2171 *
2172 * Checks whether the given interface has a bridge on top and if so returns
2173 * true if a selected querier is behind one of the other ports of this
2174 * bridge. Otherwise returns false.
2175 */
2176bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
2177{
2178 struct net_bridge *br;
2179 struct net_bridge_port *port;
2180 bool ret = false;
2181
2182 rcu_read_lock();
2183 if (!br_port_exists(dev))
2184 goto unlock;
2185
2186 port = br_port_get_rcu(dev);
2187 if (!port || !port->br)
2188 goto unlock;
2189
2190 br = port->br;
2191
2192 switch (proto) {
2193 case ETH_P_IP:
2194 if (!timer_pending(&br->ip4_other_query.timer) ||
2195 rcu_dereference(br->ip4_querier.port) == port)
2196 goto unlock;
2197 break;
3993c4e1 2198#if IS_ENABLED(CONFIG_IPV6)
2cd41431
LL		 2199 case ETH_P_IPV6:
2200 if (!timer_pending(&br->ip6_other_query.timer) ||
2201 rcu_dereference(br->ip6_querier.port) == port)
2202 goto unlock;
2203 break;
3993c4e1 2204#endif
2cd41431
LL		 2205 default:
2206 goto unlock;
2207 }
2208
2209 ret = true;
2210unlock:
2211 rcu_read_unlock();
2212 return ret;
2213}
2214EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
1080ab95
NA		 2215
2216static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 2217 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2218{
2219 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 2220 __be16 proto = skb->protocol;
2221 unsigned int t_len;
1080ab95
NA		 2222
2223 u64_stats_update_begin(&pstats->syncp);
2224 switch (proto) {
2225 case htons(ETH_P_IP):
a65056ec 2226 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 2227 switch (type) {
2228 case IGMP_HOST_MEMBERSHIP_REPORT:
2229 pstats->mstats.igmp_v1reports[dir]++;
2230 break;
2231 case IGMPV2_HOST_MEMBERSHIP_REPORT:
2232 pstats->mstats.igmp_v2reports[dir]++;
2233 break;
2234 case IGMPV3_HOST_MEMBERSHIP_REPORT:
2235 pstats->mstats.igmp_v3reports[dir]++;
2236 break;
2237 case IGMP_HOST_MEMBERSHIP_QUERY:
a65056ec
NA		 2238 if (t_len != sizeof(struct igmphdr)) {
2239 pstats->mstats.igmp_v3queries[dir]++;
2240 } else {
2241 unsigned int offset = skb_transport_offset(skb);
2242 struct igmphdr *ih, _ihdr;
2243
2244 ih = skb_header_pointer(skb, offset,
2245 sizeof(_ihdr), &_ihdr);
2246 if (!ih)
2247 break;
2248 if (!ih->code)
2249 pstats->mstats.igmp_v1queries[dir]++;
2250 else
2251 pstats->mstats.igmp_v2queries[dir]++;
2252 }
1080ab95
NA		 2253 break;
2254 case IGMP_HOST_LEAVE_MESSAGE:
2255 pstats->mstats.igmp_leaves[dir]++;
2256 break;
2257 }
2258 break;
2259#if IS_ENABLED(CONFIG_IPV6)
2260 case htons(ETH_P_IPV6):
a65056ec
NA		 2261 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
2262 sizeof(struct ipv6hdr);
2263 t_len -= skb_network_header_len(skb);
1080ab95
NA		 2264 switch (type) {
2265 case ICMPV6_MGM_REPORT:
2266 pstats->mstats.mld_v1reports[dir]++;
2267 break;
2268 case ICMPV6_MLD2_REPORT:
2269 pstats->mstats.mld_v2reports[dir]++;
2270 break;
2271 case ICMPV6_MGM_QUERY:
a65056ec
NA		 2272 if (t_len != sizeof(struct mld_msg))
2273 pstats->mstats.mld_v2queries[dir]++;
2274 else
2275 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 2276 break;
2277 case ICMPV6_MGM_REDUCTION:
2278 pstats->mstats.mld_leaves[dir]++;
2279 break;
2280 }
2281 break;
2282#endif /* CONFIG_IPV6 */
2283 }
2284 u64_stats_update_end(&pstats->syncp);
2285}
2286
2287void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
a65056ec 2288 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 2289{
2290 struct bridge_mcast_stats __percpu *stats;
2291
2292 /* if multicast_disabled is true then igmp type can't be set */
675779ad 2293 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 2294 return;
2295
2296 if (p)
2297 stats = p->mcast_stats;
2298 else
2299 stats = br->mcast_stats;
2300 if (WARN_ON(!stats))
2301 return;
2302
a65056ec 2303 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 2304}
2305
2306int br_multicast_init_stats(struct net_bridge *br)
2307{
2308 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2309 if (!br->mcast_stats)
2310 return -ENOMEM;
2311
2312 return 0;
2313}
2314
b6fe0440
IS		 2315void br_multicast_uninit_stats(struct net_bridge *br)
2316{
2317 free_percpu(br->mcast_stats);
2318}
2319
1080ab95
NA		 2320static void mcast_stats_add_dir(u64 *dst, u64 *src)
2321{
2322 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
2323 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
2324}
2325
2326void br_multicast_get_stats(const struct net_bridge *br,
2327 const struct net_bridge_port *p,
2328 struct br_mcast_stats *dest)
2329{
2330 struct bridge_mcast_stats __percpu *stats;
2331 struct br_mcast_stats tdst;
2332 int i;
2333
2334 memset(dest, 0, sizeof(*dest));
2335 if (p)
2336 stats = p->mcast_stats;
2337 else
2338 stats = br->mcast_stats;
2339 if (WARN_ON(!stats))
2340 return;
2341
2342 memset(&tdst, 0, sizeof(tdst));
2343 for_each_possible_cpu(i) {
2344 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
2345 struct br_mcast_stats temp;
2346 unsigned int start;
2347
2348 do {
2349 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
2350 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
2351 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
2352
a65056ec
NA		 2353 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
2354 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
2355 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
1080ab95
NA		 2356 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
2357 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
2358 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
2359 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
2360 tdst.igmp_parse_errors += temp.igmp_parse_errors;
2361
a65056ec
NA		 2362 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
2363 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 2364 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
2365 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
2366 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
2367 tdst.mld_parse_errors += temp.mld_parse_errors;
2368 }
2369 memcpy(dest, &tdst, sizeof(*dest));
2370}
19e3a9c9
NA		 2371
2372int br_mdb_hash_init(struct net_bridge *br)
2373{
2374 return rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
2375}
2376
2377void br_mdb_hash_fini(struct net_bridge *br)
2378{
2379 rhashtable_destroy(&br->mdb_hash_tbl);
2380}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git