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net: bridge: add vlan mcast snooping knob
[linux-block.git] / net / bridge / br_multicast.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
eb1d1641
HX		 2/*
3 * Bridge multicast support.
4 *
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
eb1d1641
HX		 6 */
7
8#include <linux/err.h>
07f8ac4a 9#include <linux/export.h>
eb1d1641
HX		 10#include <linux/if_ether.h>
11#include <linux/igmp.h>
4b3087c7 12#include <linux/in.h>
eb1d1641
HX		 13#include <linux/jhash.h>
14#include <linux/kernel.h>
b195167f 15#include <linux/log2.h>
eb1d1641
HX		 16#include <linux/netdevice.h>
17#include <linux/netfilter_bridge.h>
18#include <linux/random.h>
19#include <linux/rculist.h>
20#include <linux/skbuff.h>
21#include <linux/slab.h>
22#include <linux/timer.h>
1c8ad5bf 23#include <linux/inetdevice.h>
91b02d3d 24#include <linux/mroute.h>
eb1d1641 25#include <net/ip.h>
147c1e9b 26#include <net/switchdev.h>
dfd56b8b 27#if IS_ENABLED(CONFIG_IPV6)
4b3087c7 28#include <linux/icmpv6.h>
08b202b6
YH		 29#include <net/ipv6.h>
30#include <net/mld.h>
d4c4f07d 31#include <net/ip6_checksum.h>
3c3769e6 32#include <net/addrconf.h>
08b202b6 33#endif
eb1d1641
HX		 34
35#include "br_private.h"
8f07b831 36#include "br_private_mcast_eht.h"
eb1d1641 37
19e3a9c9
NA		 38static const struct rhashtable_params br_mdb_rht_params = {
39 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
40 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
41 .key_len = sizeof(struct br_ip),
42 .automatic_shrinking = true,
19e3a9c9
NA		 43};
44
085b53c8
NA		 45static const struct rhashtable_params br_sg_port_rht_params = {
46 .head_offset = offsetof(struct net_bridge_port_group, rhnode),
47 .key_offset = offsetof(struct net_bridge_port_group, key),
48 .key_len = sizeof(struct net_bridge_port_group_sg_key),
49 .automatic_shrinking = true,
50};
51
adc47037 52static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
90010b36 53 struct bridge_mcast_own_query *query);
adc47037
NA		 54static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
55 struct net_bridge_mcast_port *pmctx);
56static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
57 struct net_bridge_mcast_port *pmctx,
bc8c20ac 58 __be32 group,
6db6f0ea
FF		 59 __u16 vid,
60 const unsigned char *src);
42c11ccf 61static void br_multicast_port_group_rexmit(struct timer_list *t);
6db6f0ea 62
ed2d3597 63static void
adc47037
NA		 64br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted);
65static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
66 struct net_bridge_mcast_port *pmctx);
30515832 67#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 68static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
69 struct net_bridge_mcast_port *pmctx,
bc8c20ac 70 const struct in6_addr *group,
6db6f0ea 71 __u16 vid, const unsigned char *src);
bc8c20ac 72#endif
b0812368 73static struct net_bridge_port_group *
adc47037
NA		 74__br_multicast_add_group(struct net_bridge_mcast *brmctx,
75 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 76 struct br_ip *group,
77 const unsigned char *src,
78 u8 filter_mode,
9116ffbf
NA		 79 bool igmpv2_mldv1,
80 bool blocked);
8266a049
NA		 81static void br_multicast_find_del_pg(struct net_bridge *br,
82 struct net_bridge_port_group *pg);
613d61db 83static void __br_multicast_stop(struct net_bridge_mcast *brmctx);
c83b8fab 84
085b53c8
NA		 85static struct net_bridge_port_group *
86br_sg_port_find(struct net_bridge *br,
87 struct net_bridge_port_group_sg_key *sg_p)
88{
89 lockdep_assert_held_once(&br->multicast_lock);
90
91 return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
92 br_sg_port_rht_params);
93}
94
19e3a9c9
NA		 95static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
96 struct br_ip *dst)
08b202b6 97{
19e3a9c9 98 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 99}
08b202b6 100
19e3a9c9
NA		 101struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
102 struct br_ip *dst)
eb1d1641 103{
19e3a9c9 104 struct net_bridge_mdb_entry *ent;
eb1d1641 105
19e3a9c9 106 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 107
19e3a9c9
NA		 108 rcu_read_lock();
109 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
110 rcu_read_unlock();
7f285fa7 111
19e3a9c9 112 return ent;
7f285fa7
HX		 113}
114
19e3a9c9
NA		 115static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
116 __be32 dst, __u16 vid)
eb1d1641 117{
8ef2a9a5
YH		 118 struct br_ip br_dst;
119
19e3a9c9 120 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 121 br_dst.dst.ip4 = dst;
8ef2a9a5 122 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 123 br_dst.vid = vid;
0821ec55 124
19e3a9c9 125 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 126}
127
dfd56b8b 128#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 129static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
130 const struct in6_addr *dst,
131 __u16 vid)
08b202b6
YH		 132{
133 struct br_ip br_dst;
0821ec55 134
19e3a9c9 135 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 136 br_dst.dst.ip6 = *dst;
08b202b6 137 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 138 br_dst.vid = vid;
08b202b6 139
19e3a9c9 140 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 141}
142#endif
143
adc47037 144struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
fbca58a2 145 struct sk_buff *skb, u16 vid)
eb1d1641 146{
adc47037 147 struct net_bridge *br = brmctx->br;
8ef2a9a5
YH		 148 struct br_ip ip;
149
13cefad2 150 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 151 return NULL;
152
8ef2a9a5 153 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 154 return NULL;
155
19e3a9c9 156 memset(&ip, 0, sizeof(ip));
8ef2a9a5 157 ip.proto = skb->protocol;
fbca58a2 158 ip.vid = vid;
8ef2a9a5 159
eb1d1641
HX		 160 switch (skb->protocol) {
161 case htons(ETH_P_IP):
eab3227b 162 ip.dst.ip4 = ip_hdr(skb)->daddr;
adc47037 163 if (brmctx->multicast_igmp_version == 3) {
7d07a68c
NA		 164 struct net_bridge_mdb_entry *mdb;
165
166 ip.src.ip4 = ip_hdr(skb)->saddr;
167 mdb = br_mdb_ip_get_rcu(br, &ip);
168 if (mdb)
169 return mdb;
170 ip.src.ip4 = 0;
171 }
8ef2a9a5 172 break;
dfd56b8b 173#if IS_ENABLED(CONFIG_IPV6)
08b202b6 174 case htons(ETH_P_IPV6):
eab3227b 175 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
adc47037 176 if (brmctx->multicast_mld_version == 2) {
7d07a68c
NA		 177 struct net_bridge_mdb_entry *mdb;
178
179 ip.src.ip6 = ipv6_hdr(skb)->saddr;
180 mdb = br_mdb_ip_get_rcu(br, &ip);
181 if (mdb)
182 return mdb;
183 memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
184 }
08b202b6
YH		 185 break;
186#endif
8ef2a9a5 187 default:
955062b0
NA		 188 ip.proto = 0;
189 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
eb1d1641
HX		 190 }
191
19e3a9c9 192 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 193}
194
b0812368
NA		 195static bool br_port_group_equal(struct net_bridge_port_group *p,
196 struct net_bridge_port *port,
197 const unsigned char *src)
198{
199 if (p->key.port != port)
200 return false;
201
202 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
203 return true;
204
205 return ether_addr_equal(src, p->eth_addr);
206}
207
adc47037
NA		 208static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx,
209 struct net_bridge_port_group *pg,
8266a049
NA		 210 struct br_ip *sg_ip)
211{
212 struct net_bridge_port_group_sg_key sg_key;
8266a049 213 struct net_bridge_port_group *src_pg;
adc47037 214 struct net_bridge_mcast *brmctx;
8266a049
NA		 215
216 memset(&sg_key, 0, sizeof(sg_key));
7b54aaaf 217 brmctx = br_multicast_port_ctx_get_global(pmctx);
8266a049
NA		 218 sg_key.port = pg->key.port;
219 sg_key.addr = *sg_ip;
adc47037 220 if (br_sg_port_find(brmctx->br, &sg_key))
8266a049
NA		 221 return;
222
adc47037
NA		 223 src_pg = __br_multicast_add_group(brmctx, pmctx,
224 sg_ip, pg->eth_addr,
9116ffbf 225 MCAST_INCLUDE, false, false);
8266a049
NA		 226 if (IS_ERR_OR_NULL(src_pg) ||
227 src_pg->rt_protocol != RTPROT_KERNEL)
228 return;
229
230 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
231}
232
233static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
234 struct br_ip *sg_ip)
235{
236 struct net_bridge_port_group_sg_key sg_key;
237 struct net_bridge *br = pg->key.port->br;
238 struct net_bridge_port_group *src_pg;
239
240 memset(&sg_key, 0, sizeof(sg_key));
241 sg_key.port = pg->key.port;
242 sg_key.addr = *sg_ip;
243 src_pg = br_sg_port_find(br, &sg_key);
244 if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
245 src_pg->rt_protocol != RTPROT_KERNEL)
246 return;
247
248 br_multicast_find_del_pg(br, src_pg);
249}
250
251/* When a port group transitions to (or is added as) EXCLUDE we need to add it
252 * to all other ports' S,G entries which are not blocked by the current group
253 * for proper replication, the assumption is that any S,G blocked entries
254 * are already added so the S,G,port lookup should skip them.
255 * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
256 * deleted we need to remove it from all ports' S,G entries where it was
257 * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
258 */
259void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
260 u8 filter_mode)
261{
262 struct net_bridge *br = pg->key.port->br;
263 struct net_bridge_port_group *pg_lst;
adc47037 264 struct net_bridge_mcast_port *pmctx;
8266a049
NA		 265 struct net_bridge_mdb_entry *mp;
266 struct br_ip sg_ip;
267
268 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
269 return;
270
271 mp = br_mdb_ip_get(br, &pg->key.addr);
272 if (!mp)
273 return;
adc47037 274 pmctx = &pg->key.port->multicast_ctx;
8266a049
NA		 275
276 memset(&sg_ip, 0, sizeof(sg_ip));
277 sg_ip = pg->key.addr;
7b54aaaf 278
8266a049
NA		 279 for (pg_lst = mlock_dereference(mp->ports, br);
280 pg_lst;
281 pg_lst = mlock_dereference(pg_lst->next, br)) {
282 struct net_bridge_group_src *src_ent;
283
284 if (pg_lst == pg)
285 continue;
286 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
287 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
288 continue;
289 sg_ip.src = src_ent->addr.src;
290 switch (filter_mode) {
291 case MCAST_INCLUDE:
292 __fwd_del_star_excl(pg, &sg_ip);
293 break;
294 case MCAST_EXCLUDE:
adc47037 295 __fwd_add_star_excl(pmctx, pg, &sg_ip);
8266a049
NA		 296 break;
297 }
298 }
299 }
300}
301
094b82fd
NA		 302/* called when adding a new S,G with host_joined == false by default */
303static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
304 struct net_bridge_port_group *sg)
305{
306 struct net_bridge_mdb_entry *sg_mp;
307
308 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
309 return;
310 if (!star_mp->host_joined)
311 return;
312
313 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
314 if (!sg_mp)
315 return;
316 sg_mp->host_joined = true;
317}
318
319/* set the host_joined state of all of *,G's S,G entries */
320static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
321{
322 struct net_bridge *br = star_mp->br;
323 struct net_bridge_mdb_entry *sg_mp;
324 struct net_bridge_port_group *pg;
325 struct br_ip sg_ip;
326
327 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
328 return;
329
330 memset(&sg_ip, 0, sizeof(sg_ip));
331 sg_ip = star_mp->addr;
332 for (pg = mlock_dereference(star_mp->ports, br);
333 pg;
334 pg = mlock_dereference(pg->next, br)) {
335 struct net_bridge_group_src *src_ent;
336
337 hlist_for_each_entry(src_ent, &pg->src_list, node) {
338 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
339 continue;
340 sg_ip.src = src_ent->addr.src;
341 sg_mp = br_mdb_ip_get(br, &sg_ip);
342 if (!sg_mp)
343 continue;
344 sg_mp->host_joined = star_mp->host_joined;
345 }
346 }
347}
348
8266a049
NA		 349static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
350{
351 struct net_bridge_port_group __rcu **pp;
352 struct net_bridge_port_group *p;
353
354 /* *,G exclude ports are only added to S,G entries */
355 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
356 return;
357
358 /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
359 * we should ignore perm entries since they're managed by user-space
360 */
361 for (pp = &sgmp->ports;
362 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
363 pp = &p->next)
364 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
365 MDB_PG_FLAGS_PERMANENT)))
366 return;
367
094b82fd
NA		 368 /* currently the host can only have joined the *,G which means
369 * we treat it as EXCLUDE {}, so for an S,G it's considered a
370 * STAR_EXCLUDE entry and we can safely leave it
371 */
372 sgmp->host_joined = false;
373
8266a049
NA		 374 for (pp = &sgmp->ports;
375 (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
376 if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
377 br_multicast_del_pg(sgmp, p, pp);
378 else
379 pp = &p->next;
380 }
381}
382
383void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
384 struct net_bridge_port_group *sg)
385{
386 struct net_bridge_port_group_sg_key sg_key;
387 struct net_bridge *br = star_mp->br;
adc47037 388 struct net_bridge_mcast_port *pmctx;
8266a049 389 struct net_bridge_port_group *pg;
adc47037 390 struct net_bridge_mcast *brmctx;
8266a049
NA		 391
392 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
393 return;
394 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
395 return;
396
094b82fd 397 br_multicast_sg_host_state(star_mp, sg);
8266a049
NA		 398 memset(&sg_key, 0, sizeof(sg_key));
399 sg_key.addr = sg->key.addr;
adc47037 400 brmctx = &br->multicast_ctx;
8266a049
NA		 401 /* we need to add all exclude ports to the S,G */
402 for (pg = mlock_dereference(star_mp->ports, br);
403 pg;
404 pg = mlock_dereference(pg->next, br)) {
405 struct net_bridge_port_group *src_pg;
406
407 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
408 continue;
409
410 sg_key.port = pg->key.port;
411 if (br_sg_port_find(br, &sg_key))
412 continue;
413
adc47037
NA		 414 pmctx = &pg->key.port->multicast_ctx;
415 src_pg = __br_multicast_add_group(brmctx, pmctx,
8266a049
NA		 416 &sg->key.addr,
417 sg->eth_addr,
9116ffbf 418 MCAST_INCLUDE, false, false);
8266a049
NA		 419 if (IS_ERR_OR_NULL(src_pg) ||
420 src_pg->rt_protocol != RTPROT_KERNEL)
421 continue;
422 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
423 }
424}
425
b0812368
NA		 426static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
427{
8266a049 428 struct net_bridge_mdb_entry *star_mp;
adc47037 429 struct net_bridge_mcast_port *pmctx;
b0812368 430 struct net_bridge_port_group *sg;
adc47037 431 struct net_bridge_mcast *brmctx;
b0812368
NA		 432 struct br_ip sg_ip;
433
434 if (src->flags & BR_SGRP_F_INSTALLED)
435 return;
436
437 memset(&sg_ip, 0, sizeof(sg_ip));
adc47037 438 pmctx = &src->pg->key.port->multicast_ctx;
7b54aaaf 439 brmctx = br_multicast_port_ctx_get_global(pmctx);
b0812368
NA		 440 sg_ip = src->pg->key.addr;
441 sg_ip.src = src->addr.src;
adc47037
NA		 442
443 sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip,
9116ffbf
NA		 444 src->pg->eth_addr, MCAST_INCLUDE, false,
445 !timer_pending(&src->timer));
b0812368
NA		 446 if (IS_ERR_OR_NULL(sg))
447 return;
448 src->flags |= BR_SGRP_F_INSTALLED;
8266a049 449 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
b0812368
NA		 450
451 /* if it was added by user-space as perm we can skip next steps */
452 if (sg->rt_protocol != RTPROT_KERNEL &&
453 (sg->flags & MDB_PG_FLAGS_PERMANENT))
454 return;
455
456 /* the kernel is now responsible for removing this S,G */
457 del_timer(&sg->timer);
8266a049
NA		 458 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
459 if (!star_mp)
460 return;
461
462 br_multicast_sg_add_exclude_ports(star_mp, sg);
b0812368
NA		 463}
464
d5a10222
NA		 465static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
466 bool fastleave)
b0812368
NA		 467{
468 struct net_bridge_port_group *p, *pg = src->pg;
469 struct net_bridge_port_group __rcu **pp;
470 struct net_bridge_mdb_entry *mp;
471 struct br_ip sg_ip;
472
473 memset(&sg_ip, 0, sizeof(sg_ip));
474 sg_ip = pg->key.addr;
475 sg_ip.src = src->addr.src;
476
477 mp = br_mdb_ip_get(src->br, &sg_ip);
478 if (!mp)
479 return;
480
481 for (pp = &mp->ports;
482 (p = mlock_dereference(*pp, src->br)) != NULL;
483 pp = &p->next) {
484 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
485 continue;
486
487 if (p->rt_protocol != RTPROT_KERNEL &&
488 (p->flags & MDB_PG_FLAGS_PERMANENT))
489 break;
490
d5a10222
NA		 491 if (fastleave)
492 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
b0812368
NA		 493 br_multicast_del_pg(mp, p, pp);
494 break;
495 }
496 src->flags &= ~BR_SGRP_F_INSTALLED;
497}
498
9116ffbf 499/* install S,G and based on src's timer enable or disable forwarding */
b0812368
NA		 500static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
501{
9116ffbf
NA		 502 struct net_bridge_port_group_sg_key sg_key;
503 struct net_bridge_port_group *sg;
504 u8 old_flags;
505
b0812368 506 br_multicast_fwd_src_add(src);
9116ffbf
NA		 507
508 memset(&sg_key, 0, sizeof(sg_key));
509 sg_key.addr = src->pg->key.addr;
510 sg_key.addr.src = src->addr.src;
511 sg_key.port = src->pg->key.port;
512
513 sg = br_sg_port_find(src->br, &sg_key);
514 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
515 return;
516
517 old_flags = sg->flags;
518 if (timer_pending(&src->timer))
519 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
520 else
521 sg->flags |= MDB_PG_FLAGS_BLOCKED;
522
523 if (old_flags != sg->flags) {
524 struct net_bridge_mdb_entry *sg_mp;
525
526 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
527 if (!sg_mp)
528 return;
529 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
530 }
b0812368
NA		 531}
532
e12cec65
NA		 533static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
534{
535 struct net_bridge_mdb_entry *mp;
536
537 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
538 WARN_ON(!hlist_unhashed(&mp->mdb_node));
539 WARN_ON(mp->ports);
540
541 del_timer_sync(&mp->timer);
542 kfree_rcu(mp, rcu);
543}
544
545static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
546{
547 struct net_bridge *br = mp->br;
548
549 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
550 br_mdb_rht_params);
551 hlist_del_init_rcu(&mp->mdb_node);
552 hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
553 queue_work(system_long_wq, &br->mcast_gc_work);
554}
555
88c1f37f 556static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 557{
88c1f37f 558 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 559 struct net_bridge *br = mp->br;
eb1d1641
HX		 560
561 spin_lock(&br->multicast_lock);
b0812368
NA		 562 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
563 timer_pending(&mp->timer))
eb1d1641
HX		 564 goto out;
565
1bc844ee 566 br_multicast_host_leave(mp, true);
eb1d1641
HX		 567
568 if (mp->ports)
569 goto out;
e12cec65
NA		 570 br_multicast_del_mdb_entry(mp);
571out:
572 spin_unlock(&br->multicast_lock);
573}
eb1d1641 574
e12cec65
NA		 575static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
576{
577 struct net_bridge_group_src *src;
eb1d1641 578
e12cec65
NA		 579 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
580 WARN_ON(!hlist_unhashed(&src->node));
eb1d1641 581
e12cec65
NA		 582 del_timer_sync(&src->timer);
583 kfree_rcu(src, rcu);
eb1d1641
HX		 584}
585
d5a10222
NA		 586void br_multicast_del_group_src(struct net_bridge_group_src *src,
587 bool fastleave)
8b671779 588{
085b53c8 589 struct net_bridge *br = src->pg->key.port->br;
8b671779 590
d5a10222 591 br_multicast_fwd_src_remove(src, fastleave);
8b671779
NA		 592 hlist_del_init_rcu(&src->node);
593 src->pg->src_ents--;
e12cec65
NA		 594 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
595 queue_work(system_long_wq, &br->mcast_gc_work);
596}
597
598static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
599{
600 struct net_bridge_port_group *pg;
601
602 pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
603 WARN_ON(!hlist_unhashed(&pg->mglist));
604 WARN_ON(!hlist_empty(&pg->src_list));
605
606 del_timer_sync(&pg->rexmit_timer);
607 del_timer_sync(&pg->timer);
608 kfree_rcu(pg, rcu);
8b671779
NA		 609}
610
681590bd
NA		 611void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
612 struct net_bridge_port_group *pg,
613 struct net_bridge_port_group __rcu **pp)
614{
085b53c8 615 struct net_bridge *br = pg->key.port->br;
8b671779
NA		 616 struct net_bridge_group_src *ent;
617 struct hlist_node *tmp;
681590bd
NA		 618
619 rcu_assign_pointer(*pp, pg->next);
620 hlist_del_init(&pg->mglist);
baa74d39 621 br_multicast_eht_clean_sets(pg);
8b671779 622 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
d5a10222 623 br_multicast_del_group_src(ent, false);
81f19838 624 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
74705582
NA		 625 if (!br_multicast_is_star_g(&mp->addr)) {
626 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
627 br_sg_port_rht_params);
8266a049 628 br_multicast_sg_del_exclude_ports(mp);
74705582 629 } else {
8266a049 630 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
74705582 631 }
e12cec65
NA		 632 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
633 queue_work(system_long_wq, &br->mcast_gc_work);
681590bd
NA		 634
635 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
636 mod_timer(&mp->timer, jiffies);
637}
638
639static void br_multicast_find_del_pg(struct net_bridge *br,
640 struct net_bridge_port_group *pg)
eb1d1641 641{
8b671779 642 struct net_bridge_port_group __rcu **pp;
eb1d1641
HX		 643 struct net_bridge_mdb_entry *mp;
644 struct net_bridge_port_group *p;
e8051688 645
085b53c8 646 mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641
HX		 647 if (WARN_ON(!mp))
648 return;
649
e8051688
ED		 650 for (pp = &mp->ports;
651 (p = mlock_dereference(*pp, br)) != NULL;
652 pp = &p->next) {
eb1d1641
HX		 653 if (p != pg)
654 continue;
655
681590bd 656 br_multicast_del_pg(mp, pg, pp);
eb1d1641
HX		 657 return;
658 }
659
660 WARN_ON(1);
661}
662
88c1f37f 663static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 664{
88c1f37f 665 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
d6c33d67 666 struct net_bridge_group_src *src_ent;
085b53c8 667 struct net_bridge *br = pg->key.port->br;
d6c33d67
NA		 668 struct hlist_node *tmp;
669 bool changed;
eb1d1641
HX		 670
671 spin_lock(&br->multicast_lock);
672 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 673 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 674 goto out;
675
d6c33d67
NA		 676 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
677 pg->filter_mode = MCAST_INCLUDE;
678 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
679 if (!timer_pending(&src_ent->timer)) {
d5a10222 680 br_multicast_del_group_src(src_ent, false);
d6c33d67
NA		 681 changed = true;
682 }
683 }
684
685 if (hlist_empty(&pg->src_list)) {
686 br_multicast_find_del_pg(br, pg);
687 } else if (changed) {
085b53c8 688 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641 689
8266a049
NA		 690 if (changed && br_multicast_is_star_g(&pg->key.addr))
691 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
692
d6c33d67
NA		 693 if (WARN_ON(!mp))
694 goto out;
695 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
696 }
eb1d1641
HX		 697out:
698 spin_unlock(&br->multicast_lock);
699}
700
e12cec65
NA		 701static void br_multicast_gc(struct hlist_head *head)
702{
703 struct net_bridge_mcast_gc *gcent;
704 struct hlist_node *tmp;
705
706 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
707 hlist_del_init(&gcent->gc_node);
708 gcent->destroy(gcent);
709 }
710}
711
adc47037 712static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx,
438ef2d0
NA		 713 struct net_bridge_port_group *pg,
714 __be32 ip_dst, __be32 group,
715 bool with_srcs, bool over_lmqt,
42c11ccf
NA		 716 u8 sflag, u8 *igmp_type,
717 bool *need_rexmit)
eb1d1641 718{
085b53c8 719 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 720 struct net_bridge_group_src *ent;
721 size_t pkt_size, igmp_hdr_size;
722 unsigned long now = jiffies;
5e923585 723 struct igmpv3_query *ihv3;
438ef2d0
NA		 724 void *csum_start = NULL;
725 __sum16 *csum = NULL;
eb1d1641
HX		 726 struct sk_buff *skb;
727 struct igmphdr *ih;
728 struct ethhdr *eth;
438ef2d0 729 unsigned long lmqt;
eb1d1641 730 struct iphdr *iph;
438ef2d0 731 u16 lmqt_srcs = 0;
eb1d1641 732
5e923585 733 igmp_hdr_size = sizeof(*ih);
d3d065c0 734 if (brmctx->multicast_igmp_version == 3) {
5e923585 735 igmp_hdr_size = sizeof(*ihv3);
438ef2d0 736 if (pg && with_srcs) {
d3d065c0
NA		 737 lmqt = now + (brmctx->multicast_last_member_interval *
738 brmctx->multicast_last_member_count);
438ef2d0
NA		 739 hlist_for_each_entry(ent, &pg->src_list, node) {
740 if (over_lmqt == time_after(ent->timer.expires,
741 lmqt) &&
742 ent->src_query_rexmit_cnt > 0)
743 lmqt_srcs++;
744 }
745
746 if (!lmqt_srcs)
747 return NULL;
748 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
749 }
750 }
751
752 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
753 if ((p && pkt_size > p->dev->mtu) ||
adc47037 754 pkt_size > brmctx->br->dev->mtu)
438ef2d0
NA		 755 return NULL;
756
adc47037 757 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
eb1d1641
HX		 758 if (!skb)
759 goto out;
760
761 skb->protocol = htons(ETH_P_IP);
762
763 skb_reset_mac_header(skb);
764 eth = eth_hdr(skb);
765
adc47037 766 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
438ef2d0 767 ip_eth_mc_map(ip_dst, eth->h_dest);
eb1d1641
HX		 768 eth->h_proto = htons(ETH_P_IP);
769 skb_put(skb, sizeof(*eth));
770
771 skb_set_network_header(skb, skb->len);
772 iph = ip_hdr(skb);
438ef2d0 773 iph->tot_len = htons(pkt_size - sizeof(*eth));
eb1d1641
HX		 774
775 iph->version = 4;
776 iph->ihl = 6;
777 iph->tos = 0xc0;
eb1d1641
HX		 778 iph->id = 0;
779 iph->frag_off = htons(IP_DF);
780 iph->ttl = 1;
781 iph->protocol = IPPROTO_IGMP;
adc47037
NA		 782 iph->saddr = br_opt_get(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
783 inet_select_addr(brmctx->br->dev, 0, RT_SCOPE_LINK) : 0;
438ef2d0 784 iph->daddr = ip_dst;
eb1d1641
HX		 785 ((u8 *)&iph[1])[0] = IPOPT_RA;
786 ((u8 *)&iph[1])[1] = 4;
787 ((u8 *)&iph[1])[2] = 0;
788 ((u8 *)&iph[1])[3] = 0;
789 ip_send_check(iph);
790 skb_put(skb, 24);
791
792 skb_set_transport_header(skb, skb->len);
1080ab95 793 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 794
d3d065c0 795 switch (brmctx->multicast_igmp_version) {
5e923585
NA		 796 case 2:
797 ih = igmp_hdr(skb);
798 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
d3d065c0
NA		 799 ih->code = (group ? brmctx->multicast_last_member_interval :
800 brmctx->multicast_query_response_interval) /
5e923585
NA		 801 (HZ / IGMP_TIMER_SCALE);
802 ih->group = group;
803 ih->csum = 0;
438ef2d0
NA		 804 csum = &ih->csum;
805 csum_start = (void *)ih;
5e923585
NA		 806 break;
807 case 3:
808 ihv3 = igmpv3_query_hdr(skb);
809 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
d3d065c0
NA		 810 ihv3->code = (group ? brmctx->multicast_last_member_interval :
811 brmctx->multicast_query_response_interval) /
5e923585
NA		 812 (HZ / IGMP_TIMER_SCALE);
813 ihv3->group = group;
d3d065c0 814 ihv3->qqic = brmctx->multicast_query_interval / HZ;
438ef2d0 815 ihv3->nsrcs = htons(lmqt_srcs);
5e923585 816 ihv3->resv = 0;
438ef2d0 817 ihv3->suppress = sflag;
5e923585
NA		 818 ihv3->qrv = 2;
819 ihv3->csum = 0;
438ef2d0
NA		 820 csum = &ihv3->csum;
821 csum_start = (void *)ihv3;
822 if (!pg || !with_srcs)
823 break;
824
825 lmqt_srcs = 0;
826 hlist_for_each_entry(ent, &pg->src_list, node) {
827 if (over_lmqt == time_after(ent->timer.expires,
828 lmqt) &&
829 ent->src_query_rexmit_cnt > 0) {
deb96566 830 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
438ef2d0 831 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 832 if (need_rexmit && ent->src_query_rexmit_cnt)
833 *need_rexmit = true;
438ef2d0
NA		 834 }
835 }
836 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
837 kfree_skb(skb);
838 return NULL;
839 }
5e923585
NA		 840 break;
841 }
842
438ef2d0
NA		 843 if (WARN_ON(!csum || !csum_start)) {
844 kfree_skb(skb);
845 return NULL;
846 }
847
848 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
5e923585 849 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 850 __skb_pull(skb, sizeof(*eth));
851
852out:
853 return skb;
854}
855
dfd56b8b 856#if IS_ENABLED(CONFIG_IPV6)
adc47037 857static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx,
438ef2d0
NA		 858 struct net_bridge_port_group *pg,
859 const struct in6_addr *ip6_dst,
860 const struct in6_addr *group,
861 bool with_srcs, bool over_llqt,
42c11ccf
NA		 862 u8 sflag, u8 *igmp_type,
863 bool *need_rexmit)
08b202b6 864{
085b53c8 865 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 866 struct net_bridge_group_src *ent;
867 size_t pkt_size, mld_hdr_size;
868 unsigned long now = jiffies;
aa2ae3e7 869 struct mld2_query *mld2q;
438ef2d0 870 void *csum_start = NULL;
aa2ae3e7 871 unsigned long interval;
438ef2d0 872 __sum16 *csum = NULL;
08b202b6
YH		 873 struct ipv6hdr *ip6h;
874 struct mld_msg *mldq;
aa2ae3e7 875 struct sk_buff *skb;
438ef2d0 876 unsigned long llqt;
08b202b6 877 struct ethhdr *eth;
438ef2d0 878 u16 llqt_srcs = 0;
08b202b6 879 u8 *hopopt;
08b202b6 880
aa2ae3e7 881 mld_hdr_size = sizeof(*mldq);
d3d065c0 882 if (brmctx->multicast_mld_version == 2) {
aa2ae3e7 883 mld_hdr_size = sizeof(*mld2q);
438ef2d0 884 if (pg && with_srcs) {
d3d065c0
NA		 885 llqt = now + (brmctx->multicast_last_member_interval *
886 brmctx->multicast_last_member_count);
438ef2d0
NA		 887 hlist_for_each_entry(ent, &pg->src_list, node) {
888 if (over_llqt == time_after(ent->timer.expires,
889 llqt) &&
890 ent->src_query_rexmit_cnt > 0)
891 llqt_srcs++;
892 }
893
894 if (!llqt_srcs)
895 return NULL;
896 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
897 }
898 }
899
900 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
901 if ((p && pkt_size > p->dev->mtu) ||
adc47037 902 pkt_size > brmctx->br->dev->mtu)
438ef2d0
NA		 903 return NULL;
904
adc47037 905 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
08b202b6
YH		 906 if (!skb)
907 goto out;
908
909 skb->protocol = htons(ETH_P_IPV6);
910
911 /* Ethernet header */
912 skb_reset_mac_header(skb);
913 eth = eth_hdr(skb);
914
adc47037 915 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
08b202b6
YH		 916 eth->h_proto = htons(ETH_P_IPV6);
917 skb_put(skb, sizeof(*eth));
918
919 /* IPv6 header + HbH option */
920 skb_set_network_header(skb, skb->len);
921 ip6h = ipv6_hdr(skb);
922
923 *(__force __be32 *)ip6h = htonl(0x60000000);
aa2ae3e7 924 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 925 ip6h->nexthdr = IPPROTO_HOPOPTS;
926 ip6h->hop_limit = 1;
438ef2d0 927 ip6h->daddr = *ip6_dst;
adc47037
NA		 928 if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev,
929 &ip6h->daddr, 0, &ip6h->saddr)) {
d1d81d4c 930 kfree_skb(skb);
adc47037 931 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 932 return NULL;
933 }
0888d5f3 934
adc47037 935 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 936 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 937
938 hopopt = (u8 *)(ip6h + 1);
939 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
940 hopopt[1] = 0; /* length of HbH */
941 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
942 hopopt[3] = 2; /* Length of RA Option */
943 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
944 hopopt[5] = 0;
1de5a71c
EZ		 945 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
946 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 947
948 skb_put(skb, sizeof(*ip6h) + 8);
949
950 /* ICMPv6 */
951 skb_set_transport_header(skb, skb->len);
438ef2d0 952 interval = ipv6_addr_any(group) ?
d3d065c0
NA		 953 brmctx->multicast_query_response_interval :
954 brmctx->multicast_last_member_interval;
1080ab95 955 *igmp_type = ICMPV6_MGM_QUERY;
d3d065c0 956 switch (brmctx->multicast_mld_version) {
aa2ae3e7
NA		 957 case 1:
958 mldq = (struct mld_msg *)icmp6_hdr(skb);
959 mldq->mld_type = ICMPV6_MGM_QUERY;
960 mldq->mld_code = 0;
961 mldq->mld_cksum = 0;
962 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
963 mldq->mld_reserved = 0;
438ef2d0
NA		 964 mldq->mld_mca = *group;
965 csum = &mldq->mld_cksum;
966 csum_start = (void *)mldq;
aa2ae3e7
NA		 967 break;
968 case 2:
969 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 970 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 971 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
972 mld2q->mld2q_code = 0;
973 mld2q->mld2q_cksum = 0;
974 mld2q->mld2q_resv1 = 0;
975 mld2q->mld2q_resv2 = 0;
438ef2d0 976 mld2q->mld2q_suppress = sflag;
aa2ae3e7 977 mld2q->mld2q_qrv = 2;
438ef2d0 978 mld2q->mld2q_nsrcs = htons(llqt_srcs);
d3d065c0 979 mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ;
438ef2d0
NA		 980 mld2q->mld2q_mca = *group;
981 csum = &mld2q->mld2q_cksum;
982 csum_start = (void *)mld2q;
983 if (!pg || !with_srcs)
984 break;
985
986 llqt_srcs = 0;
987 hlist_for_each_entry(ent, &pg->src_list, node) {
988 if (over_llqt == time_after(ent->timer.expires,
989 llqt) &&
990 ent->src_query_rexmit_cnt > 0) {
deb96566 991 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
438ef2d0 992 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 993 if (need_rexmit && ent->src_query_rexmit_cnt)
994 *need_rexmit = true;
438ef2d0
NA		 995 }
996 }
997 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
998 kfree_skb(skb);
999 return NULL;
1000 }
aa2ae3e7
NA		 1001 break;
1002 }
08b202b6 1003
438ef2d0
NA		 1004 if (WARN_ON(!csum || !csum_start)) {
1005 kfree_skb(skb);
1006 return NULL;
1007 }
1008
1009 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
1010 IPPROTO_ICMPV6,
1011 csum_partial(csum_start, mld_hdr_size, 0));
1012 skb_put(skb, mld_hdr_size);
08b202b6
YH		 1013 __skb_pull(skb, sizeof(*eth));
1014
1015out:
1016 return skb;
1017}
1018#endif
1019
adc47037 1020static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx,
438ef2d0
NA		 1021 struct net_bridge_port_group *pg,
1022 struct br_ip *ip_dst,
1023 struct br_ip *group,
1024 bool with_srcs, bool over_lmqt,
42c11ccf
NA		 1025 u8 sflag, u8 *igmp_type,
1026 bool *need_rexmit)
8ef2a9a5 1027{
438ef2d0
NA		 1028 __be32 ip4_dst;
1029
1030 switch (group->proto) {
8ef2a9a5 1031 case htons(ETH_P_IP):
eab3227b 1032 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
adc47037 1033 return br_ip4_multicast_alloc_query(brmctx, pg,
eab3227b 1034 ip4_dst, group->dst.ip4,
438ef2d0 1035 with_srcs, over_lmqt,
42c11ccf
NA		 1036 sflag, igmp_type,
1037 need_rexmit);
dfd56b8b 1038#if IS_ENABLED(CONFIG_IPV6)
438ef2d0
NA		 1039 case htons(ETH_P_IPV6): {
1040 struct in6_addr ip6_dst;
1041
1042 if (ip_dst)
eab3227b 1043 ip6_dst = ip_dst->dst.ip6;
438ef2d0
NA		 1044 else
1045 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1046 htonl(1));
1047
adc47037 1048 return br_ip6_multicast_alloc_query(brmctx, pg,
eab3227b 1049 &ip6_dst, &group->dst.ip6,
438ef2d0 1050 with_srcs, over_lmqt,
42c11ccf
NA		 1051 sflag, igmp_type,
1052 need_rexmit);
438ef2d0 1053 }
08b202b6 1054#endif
8ef2a9a5
YH		 1055 }
1056 return NULL;
1057}
1058
cfd56754 1059struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 1060 struct br_ip *group)
eb1d1641 1061{
eb1d1641 1062 struct net_bridge_mdb_entry *mp;
4c0833bc 1063 int err;
eb1d1641 1064
19e3a9c9
NA		 1065 mp = br_mdb_ip_get(br, group);
1066 if (mp)
1067 return mp;
eb1d1641 1068
19e3a9c9
NA		 1069 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
1070 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1071 return ERR_PTR(-E2BIG);
eb1d1641
HX		 1072 }
1073
1074 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1075 if (unlikely(!mp))
4c0833bc 1076 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 1077
1078 mp->br = br;
8ef2a9a5 1079 mp->addr = *group;
e12cec65 1080 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
88c1f37f 1081 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 1082 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1083 br_mdb_rht_params);
1084 if (err) {
1085 kfree(mp);
1086 mp = ERR_PTR(err);
1087 } else {
1088 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1089 }
1faabf2a 1090
eb1d1641
HX		 1091 return mp;
1092}
1093
8b671779
NA		 1094static void br_multicast_group_src_expired(struct timer_list *t)
1095{
1096 struct net_bridge_group_src *src = from_timer(src, t, timer);
1097 struct net_bridge_port_group *pg;
1098 struct net_bridge *br = src->br;
1099
1100 spin_lock(&br->multicast_lock);
1101 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1102 timer_pending(&src->timer))
1103 goto out;
1104
1105 pg = src->pg;
1106 if (pg->filter_mode == MCAST_INCLUDE) {
d5a10222 1107 br_multicast_del_group_src(src, false);
8b671779
NA		 1108 if (!hlist_empty(&pg->src_list))
1109 goto out;
1110 br_multicast_find_del_pg(br, pg);
9116ffbf
NA		 1111 } else {
1112 br_multicast_fwd_src_handle(src);
8b671779 1113 }
9116ffbf 1114
8b671779
NA		 1115out:
1116 spin_unlock(&br->multicast_lock);
1117}
1118
474ddb37 1119struct net_bridge_group_src *
8b671779
NA		 1120br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1121{
1122 struct net_bridge_group_src *ent;
1123
1124 switch (ip->proto) {
1125 case htons(ETH_P_IP):
1126 hlist_for_each_entry(ent, &pg->src_list, node)
deb96566 1127 if (ip->src.ip4 == ent->addr.src.ip4)
8b671779
NA		 1128 return ent;
1129 break;
1130#if IS_ENABLED(CONFIG_IPV6)
1131 case htons(ETH_P_IPV6):
1132 hlist_for_each_entry(ent, &pg->src_list, node)
deb96566 1133 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
8b671779
NA		 1134 return ent;
1135 break;
1136#endif
1137 }
1138
1139 return NULL;
1140}
1141
1142static struct net_bridge_group_src *
1143br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1144{
1145 struct net_bridge_group_src *grp_src;
1146
1147 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1148 return NULL;
1149
1150 switch (src_ip->proto) {
1151 case htons(ETH_P_IP):
deb96566
NA		 1152 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1153 ipv4_is_multicast(src_ip->src.ip4))
8b671779
NA		 1154 return NULL;
1155 break;
1156#if IS_ENABLED(CONFIG_IPV6)
1157 case htons(ETH_P_IPV6):
deb96566
NA		 1158 if (ipv6_addr_any(&src_ip->src.ip6) ||
1159 ipv6_addr_is_multicast(&src_ip->src.ip6))
8b671779
NA		 1160 return NULL;
1161 break;
1162#endif
1163 }
1164
1165 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1166 if (unlikely(!grp_src))
1167 return NULL;
1168
1169 grp_src->pg = pg;
085b53c8 1170 grp_src->br = pg->key.port->br;
8b671779 1171 grp_src->addr = *src_ip;
e12cec65 1172 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
8b671779
NA		 1173 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1174
1175 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1176 pg->src_ents++;
1177
1178 return grp_src;
1179}
1180
cfd56754
CW		 1181struct net_bridge_port_group *br_multicast_new_port_group(
1182 struct net_bridge_port *port,
1183 struct br_ip *group,
ccb1c31a 1184 struct net_bridge_port_group __rcu *next,
6db6f0ea 1185 unsigned char flags,
8b671779 1186 const unsigned char *src,
8f8cb77e
NA		 1187 u8 filter_mode,
1188 u8 rt_protocol)
cfd56754
CW		 1189{
1190 struct net_bridge_port_group *p;
1191
1192 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1193 if (unlikely(!p))
1194 return NULL;
1195
085b53c8
NA		 1196 p->key.addr = *group;
1197 p->key.port = port;
9d06b6d8 1198 p->flags = flags;
8b671779 1199 p->filter_mode = filter_mode;
8f8cb77e 1200 p->rt_protocol = rt_protocol;
5b163288 1201 p->eht_host_tree = RB_ROOT;
baa74d39 1202 p->eht_set_tree = RB_ROOT;
e12cec65 1203 p->mcast_gc.destroy = br_multicast_destroy_port_group;
8b671779 1204 INIT_HLIST_HEAD(&p->src_list);
085b53c8
NA		 1205
1206 if (!br_multicast_is_star_g(group) &&
1207 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1208 br_sg_port_rht_params)) {
1209 kfree(p);
1210 return NULL;
1211 }
1212
eca2a43b 1213 rcu_assign_pointer(p->next, next);
88c1f37f 1214 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
42c11ccf
NA		 1215 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1216 hlist_add_head(&p->mglist, &port->mglist);
6db6f0ea
FF		 1217
1218 if (src)
1219 memcpy(p->eth_addr, src, ETH_ALEN);
1220 else
1bfe45f4 1221 eth_broadcast_addr(p->eth_addr);
6db6f0ea 1222
cfd56754
CW		 1223 return p;
1224}
1225
1bc844ee
NA		 1226void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify)
1227{
1228 if (!mp->host_joined) {
1229 mp->host_joined = true;
094b82fd
NA		 1230 if (br_multicast_is_star_g(&mp->addr))
1231 br_multicast_star_g_host_state(mp);
1bc844ee 1232 if (notify)
81f19838 1233 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1bc844ee 1234 }
955062b0
NA		 1235
1236 if (br_group_is_l2(&mp->addr))
1237 return;
1238
d3d065c0
NA		 1239 mod_timer(&mp->timer,
1240 jiffies + mp->br->multicast_ctx.multicast_membership_interval);
1bc844ee
NA		 1241}
1242
1243void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1244{
1245 if (!mp->host_joined)
1246 return;
1247
1248 mp->host_joined = false;
094b82fd
NA		 1249 if (br_multicast_is_star_g(&mp->addr))
1250 br_multicast_star_g_host_state(mp);
1bc844ee 1251 if (notify)
81f19838 1252 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1bc844ee
NA		 1253}
1254
b0812368 1255static struct net_bridge_port_group *
adc47037
NA		 1256__br_multicast_add_group(struct net_bridge_mcast *brmctx,
1257 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 1258 struct br_ip *group,
1259 const unsigned char *src,
1260 u8 filter_mode,
9116ffbf
NA		 1261 bool igmpv2_mldv1,
1262 bool blocked)
eb1d1641 1263{
e8051688 1264 struct net_bridge_port_group __rcu **pp;
b0812368 1265 struct net_bridge_port_group *p = NULL;
5e923585 1266 struct net_bridge_mdb_entry *mp;
454594f3 1267 unsigned long now = jiffies;
eb1d1641 1268
adc47037
NA		 1269 if (!netif_running(brmctx->br->dev) ||
1270 (pmctx && pmctx->port->state == BR_STATE_DISABLED))
eb1d1641
HX		 1271 goto out;
1272
adc47037 1273 mp = br_multicast_new_group(brmctx->br, group);
4c0833bc 1274 if (IS_ERR(mp))
1697291d 1275 return ERR_CAST(mp);
eb1d1641 1276
adc47037 1277 if (!pmctx) {
1bc844ee 1278 br_multicast_host_join(mp, true);
eb1d1641
HX		 1279 goto out;
1280 }
1281
e8051688 1282 for (pp = &mp->ports;
adc47037 1283 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 1284 pp = &p->next) {
adc47037 1285 if (br_port_group_equal(p, pmctx->port, src))
454594f3 1286 goto found;
adc47037 1287 if ((unsigned long)p->key.port < (unsigned long)pmctx->port)
eb1d1641
HX		 1288 break;
1289 }
1290
adc47037 1291 p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src,
955062b0 1292 filter_mode, RTPROT_KERNEL);
b0812368
NA		 1293 if (unlikely(!p)) {
1294 p = ERR_PTR(-ENOMEM);
1295 goto out;
1296 }
eb1d1641 1297 rcu_assign_pointer(*pp, p);
9116ffbf
NA		 1298 if (blocked)
1299 p->flags |= MDB_PG_FLAGS_BLOCKED;
adc47037 1300 br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB);
eb1d1641 1301
454594f3 1302found:
0436862e 1303 if (igmpv2_mldv1)
d3d065c0 1304 mod_timer(&p->timer,
adc47037 1305 now + brmctx->multicast_membership_interval);
81f19838 1306
eb1d1641 1307out:
b0812368
NA		 1308 return p;
1309}
1310
adc47037
NA		 1311static int br_multicast_add_group(struct net_bridge_mcast *brmctx,
1312 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 1313 struct br_ip *group,
1314 const unsigned char *src,
1315 u8 filter_mode,
1316 bool igmpv2_mldv1)
1317{
1318 struct net_bridge_port_group *pg;
1319 int err;
eb1d1641 1320
adc47037
NA		 1321 spin_lock(&brmctx->br->multicast_lock);
1322 pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode,
9116ffbf 1323 igmpv2_mldv1, false);
b0812368 1324 /* NULL is considered valid for host joined groups */
8d21c882 1325 err = PTR_ERR_OR_ZERO(pg);
adc47037 1326 spin_unlock(&brmctx->br->multicast_lock);
b0812368 1327
eb1d1641
HX		 1328 return err;
1329}
1330
adc47037
NA		 1331static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx,
1332 struct net_bridge_mcast_port *pmctx,
b0e9a30d 1333 __be32 group,
6db6f0ea 1334 __u16 vid,
8b671779
NA		 1335 const unsigned char *src,
1336 bool igmpv2)
8ef2a9a5
YH		 1337{
1338 struct br_ip br_group;
8b671779 1339 u8 filter_mode;
8ef2a9a5
YH		 1340
1341 if (ipv4_is_local_multicast(group))
1342 return 0;
1343
1515a63f 1344 memset(&br_group, 0, sizeof(br_group));
eab3227b 1345 br_group.dst.ip4 = group;
8ef2a9a5 1346 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1347 br_group.vid = vid;
8b671779 1348 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
8ef2a9a5 1349
adc47037
NA		 1350 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1351 filter_mode, igmpv2);
8ef2a9a5
YH		 1352}
1353
dfd56b8b 1354#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 1355static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx,
1356 struct net_bridge_mcast_port *pmctx,
b0e9a30d 1357 const struct in6_addr *group,
6db6f0ea 1358 __u16 vid,
8b671779
NA		 1359 const unsigned char *src,
1360 bool mldv1)
08b202b6
YH		 1361{
1362 struct br_ip br_group;
8b671779 1363 u8 filter_mode;
08b202b6 1364
3c3769e6 1365 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1366 return 0;
1367
19e3a9c9 1368 memset(&br_group, 0, sizeof(br_group));
eab3227b 1369 br_group.dst.ip6 = *group;
9cc6e0c4 1370 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1371 br_group.vid = vid;
8b671779 1372 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
08b202b6 1373
adc47037
NA		 1374 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1375 filter_mode, mldv1);
08b202b6
YH		 1376}
1377#endif
1378
ed2d3597
LL		 1379static bool br_multicast_rport_del(struct hlist_node *rlist)
1380{
1381 if (hlist_unhashed(rlist))
1382 return false;
1383
1384 hlist_del_init_rcu(rlist);
1385 return true;
1386}
1387
adc47037 1388static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
ed2d3597 1389{
adc47037 1390 return br_multicast_rport_del(&pmctx->ip4_rlist);
ed2d3597
LL		 1391}
1392
adc47037 1393static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 1394{
1395#if IS_ENABLED(CONFIG_IPV6)
adc47037 1396 return br_multicast_rport_del(&pmctx->ip6_rlist);
a3c02e76
LL		 1397#else
1398 return false;
1399#endif
1400}
1401
9632233e 1402static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx,
ee5fb222
LL		 1403 struct timer_list *t,
1404 struct hlist_node *rlist)
eb1d1641 1405{
9632233e 1406 struct net_bridge *br = pmctx->port->br;
ed2d3597 1407 bool del;
eb1d1641
HX		 1408
1409 spin_lock(&br->multicast_lock);
9632233e
NA		 1410 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1411 pmctx->multicast_router == MDB_RTR_TYPE_PERM ||
ee5fb222 1412 timer_pending(t))
eb1d1641
HX		 1413 goto out;
1414
ed2d3597 1415 del = br_multicast_rport_del(rlist);
adc47037 1416 br_multicast_rport_del_notify(pmctx, del);
eb1d1641
HX		 1417out:
1418 spin_unlock(&br->multicast_lock);
1419}
1420
ee5fb222
LL		 1421static void br_ip4_multicast_router_expired(struct timer_list *t)
1422{
9632233e
NA		 1423 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1424 ip4_mc_router_timer);
ee5fb222 1425
9632233e 1426 br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist);
ee5fb222
LL		 1427}
1428
a3c02e76
LL		 1429#if IS_ENABLED(CONFIG_IPV6)
1430static void br_ip6_multicast_router_expired(struct timer_list *t)
1431{
9632233e
NA		 1432 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1433 ip6_mc_router_timer);
a3c02e76 1434
9632233e 1435 br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist);
a3c02e76
LL		 1436}
1437#endif
1438
77041420
YG		 1439static void br_mc_router_state_change(struct net_bridge *p,
1440 bool is_mc_router)
1441{
1442 struct switchdev_attr attr = {
1443 .orig_dev = p->dev,
1444 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1445 .flags = SWITCHDEV_F_DEFER,
1446 .u.mrouter = is_mc_router,
1447 };
1448
dcbdf135 1449 switchdev_port_attr_set(p->dev, &attr, NULL);
77041420
YG		 1450}
1451
d3d065c0 1452static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx,
ee5fb222 1453 struct timer_list *timer)
eb1d1641 1454{
d3d065c0
NA		 1455 spin_lock(&brmctx->br->multicast_lock);
1456 if (brmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1457 brmctx->multicast_router == MDB_RTR_TYPE_PERM ||
1458 br_ip4_multicast_is_router(brmctx) ||
1459 br_ip6_multicast_is_router(brmctx))
77041420
YG		 1460 goto out;
1461
d3d065c0 1462 br_mc_router_state_change(brmctx->br, false);
77041420 1463out:
d3d065c0 1464 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 1465}
1466
ee5fb222
LL		 1467static void br_ip4_multicast_local_router_expired(struct timer_list *t)
1468{
d3d065c0
NA		 1469 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1470 ip4_mc_router_timer);
ee5fb222 1471
d3d065c0 1472 br_multicast_local_router_expired(brmctx, t);
ee5fb222
LL		 1473}
1474
a3c02e76
LL		 1475#if IS_ENABLED(CONFIG_IPV6)
1476static void br_ip6_multicast_local_router_expired(struct timer_list *t)
1477{
d3d065c0
NA		 1478 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1479 ip6_mc_router_timer);
a3c02e76 1480
d3d065c0 1481 br_multicast_local_router_expired(brmctx, t);
a3c02e76
LL		 1482}
1483#endif
1484
d3d065c0 1485static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx,
90010b36 1486 struct bridge_mcast_own_query *query)
c83b8fab 1487{
d3d065c0
NA		 1488 spin_lock(&brmctx->br->multicast_lock);
1489 if (!netif_running(brmctx->br->dev) ||
1490 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 1491 goto out;
1492
adc47037 1493 br_multicast_start_querier(brmctx, query);
c83b8fab
HX		 1494
1495out:
d3d065c0 1496 spin_unlock(&brmctx->br->multicast_lock);
c83b8fab
HX		 1497}
1498
88c1f37f 1499static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1500{
d3d065c0
NA		 1501 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1502 ip4_other_query.timer);
cc0fdd80 1503
d3d065c0 1504 br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query);
cc0fdd80
LL		 1505}
1506
1507#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1508static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1509{
d3d065c0
NA		 1510 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1511 ip6_other_query.timer);
cc0fdd80 1512
d3d065c0 1513 br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query);
cc0fdd80
LL		 1514}
1515#endif
1516
adc47037 1517static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx,
dc4eb53a
LL		 1518 struct br_ip *ip,
1519 struct sk_buff *skb)
1520{
1521 if (ip->proto == htons(ETH_P_IP))
d3d065c0 1522 brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
dc4eb53a
LL		 1523#if IS_ENABLED(CONFIG_IPV6)
1524 else
d3d065c0 1525 brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
dc4eb53a
LL		 1526#endif
1527}
1528
adc47037
NA		 1529static void __br_multicast_send_query(struct net_bridge_mcast *brmctx,
1530 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 1531 struct net_bridge_port_group *pg,
1532 struct br_ip *ip_dst,
1533 struct br_ip *group,
1534 bool with_srcs,
42c11ccf
NA		 1535 u8 sflag,
1536 bool *need_rexmit)
eb1d1641 1537{
438ef2d0 1538 bool over_lmqt = !!sflag;
eb1d1641 1539 struct sk_buff *skb;
1080ab95 1540 u8 igmp_type;
eb1d1641 1541
438ef2d0 1542again_under_lmqt:
adc47037 1543 skb = br_multicast_alloc_query(brmctx, pg, ip_dst, group, with_srcs,
42c11ccf
NA		 1544 over_lmqt, sflag, &igmp_type,
1545 need_rexmit);
eb1d1641 1546 if (!skb)
8ef2a9a5 1547 return;
eb1d1641 1548
adc47037
NA		 1549 if (pmctx) {
1550 skb->dev = pmctx->port->dev;
1551 br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type,
1080ab95 1552 BR_MCAST_DIR_TX);
29a26a56 1553 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
adc47037 1554 dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 1555 br_dev_queue_push_xmit);
438ef2d0
NA		 1556
1557 if (over_lmqt && with_srcs && sflag) {
1558 over_lmqt = false;
1559 goto again_under_lmqt;
1560 }
dc4eb53a 1561 } else {
adc47037
NA		 1562 br_multicast_select_own_querier(brmctx, group, skb);
1563 br_multicast_count(brmctx->br, NULL, skb, igmp_type,
1080ab95 1564 BR_MCAST_DIR_RX);
eb1d1641 1565 netif_rx(skb);
dc4eb53a 1566 }
8ef2a9a5
YH		 1567}
1568
adc47037
NA		 1569static void br_multicast_send_query(struct net_bridge_mcast *brmctx,
1570 struct net_bridge_mcast_port *pmctx,
90010b36 1571 struct bridge_mcast_own_query *own_query)
8ef2a9a5 1572{
90010b36 1573 struct bridge_mcast_other_query *other_query = NULL;
5e923585
NA		 1574 struct br_ip br_group;
1575 unsigned long time;
8ef2a9a5 1576
adc47037
NA		 1577 if (!netif_running(brmctx->br->dev) ||
1578 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
1579 !br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER))
8ef2a9a5
YH		 1580 return;
1581
eab3227b 1582 memset(&br_group.dst, 0, sizeof(br_group.dst));
08b202b6 1583
adc47037
NA		 1584 if (pmctx ? (own_query == &pmctx->ip4_own_query) :
1585 (own_query == &brmctx->ip4_own_query)) {
d3d065c0 1586 other_query = &brmctx->ip4_other_query;
cc0fdd80 1587 br_group.proto = htons(ETH_P_IP);
dfd56b8b 1588#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 1589 } else {
d3d065c0 1590 other_query = &brmctx->ip6_other_query;
cc0fdd80 1591 br_group.proto = htons(ETH_P_IPV6);
08b202b6 1592#endif
cc0fdd80
LL		 1593 }
1594
90010b36 1595 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 1596 return;
1597
adc47037
NA		 1598 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false,
1599 0, NULL);
eb1d1641 1600
eb1d1641 1601 time = jiffies;
d3d065c0
NA		 1602 time += own_query->startup_sent < brmctx->multicast_startup_query_count ?
1603 brmctx->multicast_startup_query_interval :
1604 brmctx->multicast_query_interval;
90010b36 1605 mod_timer(&own_query->timer, time);
eb1d1641
HX		 1606}
1607
90010b36 1608static void
9632233e 1609br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx,
90010b36 1610 struct bridge_mcast_own_query *query)
eb1d1641 1611{
9632233e 1612 struct net_bridge *br = pmctx->port->br;
eb1d1641
HX		 1613
1614 spin_lock(&br->multicast_lock);
9632233e
NA		 1615 if (pmctx->port->state == BR_STATE_DISABLED ||
1616 pmctx->port->state == BR_STATE_BLOCKING)
eb1d1641
HX		 1617 goto out;
1618
d3d065c0 1619 if (query->startup_sent < br->multicast_ctx.multicast_startup_query_count)
cc0fdd80 1620 query->startup_sent++;
eb1d1641 1621
adc47037 1622 br_multicast_send_query(&br->multicast_ctx, pmctx, query);
eb1d1641
HX		 1623
1624out:
1625 spin_unlock(&br->multicast_lock);
1626}
1627
88c1f37f 1628static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1629{
9632233e
NA		 1630 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1631 ip4_own_query.timer);
cc0fdd80 1632
9632233e 1633 br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query);
cc0fdd80
LL		 1634}
1635
1636#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1637static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1638{
9632233e
NA		 1639 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1640 ip6_own_query.timer);
cc0fdd80 1641
9632233e 1642 br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query);
cc0fdd80
LL		 1643}
1644#endif
1645
42c11ccf
NA		 1646static void br_multicast_port_group_rexmit(struct timer_list *t)
1647{
1648 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1649 struct bridge_mcast_other_query *other_query = NULL;
085b53c8 1650 struct net_bridge *br = pg->key.port->br;
adc47037
NA		 1651 struct net_bridge_mcast_port *pmctx;
1652 struct net_bridge_mcast *brmctx;
42c11ccf
NA		 1653 bool need_rexmit = false;
1654
1655 spin_lock(&br->multicast_lock);
1656 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
1657 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1658 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
1659 goto out;
1660
adc47037
NA		 1661 brmctx = &br->multicast_ctx;
1662 pmctx = &pg->key.port->multicast_ctx;
085b53c8 1663 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 1664 other_query = &brmctx->ip4_other_query;
42c11ccf
NA		 1665#if IS_ENABLED(CONFIG_IPV6)
1666 else
d3d065c0 1667 other_query = &brmctx->ip6_other_query;
42c11ccf
NA		 1668#endif
1669
1670 if (!other_query || timer_pending(&other_query->timer))
1671 goto out;
1672
1673 if (pg->grp_query_rexmit_cnt) {
1674 pg->grp_query_rexmit_cnt--;
adc47037 1675 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1676 &pg->key.addr, false, 1, NULL);
42c11ccf 1677 }
adc47037 1678 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1679 &pg->key.addr, true, 0, &need_rexmit);
42c11ccf
NA		 1680
1681 if (pg->grp_query_rexmit_cnt || need_rexmit)
1682 mod_timer(&pg->rexmit_timer, jiffies +
d3d065c0 1683 brmctx->multicast_last_member_interval);
42c11ccf
NA		 1684out:
1685 spin_unlock(&br->multicast_lock);
1686}
1687
ae1ea84b
FF		 1688static int br_mc_disabled_update(struct net_device *dev, bool value,
1689 struct netlink_ext_ack *extack)
147c1e9b
NF		 1690{
1691 struct switchdev_attr attr = {
1692 .orig_dev = dev,
1693 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1694 .flags = SWITCHDEV_F_DEFER,
13cefad2 1695 .u.mc_disabled = !value,
147c1e9b
NF		 1696 };
1697
ae1ea84b 1698 return switchdev_port_attr_set(dev, &attr, extack);
147c1e9b
NF		 1699}
1700
613d61db
NA		 1701void br_multicast_port_ctx_init(struct net_bridge_port *port,
1702 struct net_bridge_vlan *vlan,
1703 struct net_bridge_mcast_port *pmctx)
eb1d1641 1704{
9632233e 1705 pmctx->port = port;
613d61db 1706 pmctx->vlan = vlan;
9632233e
NA		 1707 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1708 timer_setup(&pmctx->ip4_mc_router_timer,
ee5fb222 1709 br_ip4_multicast_router_expired, 0);
9632233e 1710 timer_setup(&pmctx->ip4_own_query.timer,
88c1f37f 1711 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 1712#if IS_ENABLED(CONFIG_IPV6)
9632233e 1713 timer_setup(&pmctx->ip6_mc_router_timer,
a3c02e76 1714 br_ip6_multicast_router_expired, 0);
9632233e 1715 timer_setup(&pmctx->ip6_own_query.timer,
88c1f37f 1716 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 1717#endif
9632233e
NA		 1718}
1719
613d61db 1720void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
9632233e
NA		 1721{
1722#if IS_ENABLED(CONFIG_IPV6)
1723 del_timer_sync(&pmctx->ip6_mc_router_timer);
1724#endif
1725 del_timer_sync(&pmctx->ip4_mc_router_timer);
1726}
1727
1728int br_multicast_add_port(struct net_bridge_port *port)
1729{
1730 int err;
1731
1732 port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
613d61db 1733 br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx);
9632233e 1734
ae1ea84b
FF		 1735 err = br_mc_disabled_update(port->dev,
1736 br_opt_get(port->br,
1737 BROPT_MULTICAST_ENABLED),
1738 NULL);
68f5c12a 1739 if (err && err != -EOPNOTSUPP)
ae1ea84b 1740 return err;
147c1e9b 1741
1080ab95
NA		 1742 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
1743 if (!port->mcast_stats)
1744 return -ENOMEM;
1745
1746 return 0;
eb1d1641
HX		 1747}
1748
1749void br_multicast_del_port(struct net_bridge_port *port)
1750{
e10177ab
SA		 1751 struct net_bridge *br = port->br;
1752 struct net_bridge_port_group *pg;
e12cec65 1753 HLIST_HEAD(deleted_head);
e10177ab
SA		 1754 struct hlist_node *n;
1755
1756 /* Take care of the remaining groups, only perm ones should be left */
1757 spin_lock_bh(&br->multicast_lock);
1758 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
681590bd 1759 br_multicast_find_del_pg(br, pg);
e12cec65 1760 hlist_move_list(&br->mcast_gc_list, &deleted_head);
e10177ab 1761 spin_unlock_bh(&br->multicast_lock);
e12cec65 1762 br_multicast_gc(&deleted_head);
9632233e 1763 br_multicast_port_ctx_deinit(&port->multicast_ctx);
1080ab95 1764 free_percpu(port->mcast_stats);
eb1d1641
HX		 1765}
1766
90010b36 1767static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 1768{
cc0fdd80 1769 query->startup_sent = 0;
561f1103 1770
cc0fdd80
LL		 1771 if (try_to_del_timer_sync(&query->timer) >= 0 ||
1772 del_timer(&query->timer))
1773 mod_timer(&query->timer, jiffies);
561f1103
HX		 1774}
1775
adc47037 1776static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx)
eb1d1641 1777{
adc47037 1778 struct net_bridge *br = pmctx->port->br;
7b54aaaf 1779 struct net_bridge_mcast *brmctx;
eb1d1641 1780
7b54aaaf
NA		 1781 brmctx = br_multicast_port_ctx_get_global(pmctx);
1782 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1783 !netif_running(br->dev))
7cb3f921 1784 return;
eb1d1641 1785
adc47037 1786 br_multicast_enable(&pmctx->ip4_own_query);
cc0fdd80 1787#if IS_ENABLED(CONFIG_IPV6)
adc47037 1788 br_multicast_enable(&pmctx->ip6_own_query);
cc0fdd80 1789#endif
adc47037
NA		 1790 if (pmctx->multicast_router == MDB_RTR_TYPE_PERM) {
1791 br_ip4_multicast_add_router(brmctx, pmctx);
1792 br_ip6_multicast_add_router(brmctx, pmctx);
a3c02e76 1793 }
7cb3f921 1794}
eb1d1641 1795
7cb3f921
NA		 1796void br_multicast_enable_port(struct net_bridge_port *port)
1797{
1798 struct net_bridge *br = port->br;
1799
f4b7002a 1800 spin_lock_bh(&br->multicast_lock);
adc47037 1801 __br_multicast_enable_port_ctx(&port->multicast_ctx);
f4b7002a 1802 spin_unlock_bh(&br->multicast_lock);
eb1d1641
HX		 1803}
1804
7b54aaaf 1805static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx)
eb1d1641 1806{
eb1d1641 1807 struct net_bridge_port_group *pg;
b67bfe0d 1808 struct hlist_node *n;
ed2d3597 1809 bool del = false;
eb1d1641 1810
7b54aaaf
NA		 1811 hlist_for_each_entry_safe(pg, n, &pmctx->port->mglist, mglist)
1812 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT) &&
1813 (!br_multicast_port_ctx_is_vlan(pmctx) ||
1814 pg->key.addr.vid == pmctx->vlan->vid))
1815 br_multicast_find_del_pg(pmctx->port->br, pg);
eb1d1641 1816
adc47037
NA		 1817 del |= br_ip4_multicast_rport_del(pmctx);
1818 del_timer(&pmctx->ip4_mc_router_timer);
1819 del_timer(&pmctx->ip4_own_query.timer);
1820 del |= br_ip6_multicast_rport_del(pmctx);
cc0fdd80 1821#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 1822 del_timer(&pmctx->ip6_mc_router_timer);
1823 del_timer(&pmctx->ip6_own_query.timer);
cc0fdd80 1824#endif
adc47037 1825 br_multicast_rport_del_notify(pmctx, del);
7b54aaaf
NA		 1826}
1827
1828void br_multicast_disable_port(struct net_bridge_port *port)
1829{
f4b7002a 1830 spin_lock_bh(&port->br->multicast_lock);
7b54aaaf 1831 __br_multicast_disable_port_ctx(&port->multicast_ctx);
f4b7002a 1832 spin_unlock_bh(&port->br->multicast_lock);
eb1d1641
HX		 1833}
1834
e6231bca
NA		 1835static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
1836{
1837 struct net_bridge_group_src *ent;
1838 struct hlist_node *tmp;
1839 int deleted = 0;
1840
1841 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
1842 if (ent->flags & BR_SGRP_F_DELETE) {
d5a10222 1843 br_multicast_del_group_src(ent, false);
e6231bca
NA		 1844 deleted++;
1845 }
1846
1847 return deleted;
1848}
1849
b0812368
NA		 1850static void __grp_src_mod_timer(struct net_bridge_group_src *src,
1851 unsigned long expires)
1852{
1853 mod_timer(&src->timer, expires);
1854 br_multicast_fwd_src_handle(src);
1855}
1856
adc47037
NA		 1857static void __grp_src_query_marked_and_rexmit(struct net_bridge_mcast *brmctx,
1858 struct net_bridge_mcast_port *pmctx,
1859 struct net_bridge_port_group *pg)
5bf1e00b
NA		 1860{
1861 struct bridge_mcast_other_query *other_query = NULL;
d3d065c0 1862 u32 lmqc = brmctx->multicast_last_member_count;
5bf1e00b
NA		 1863 unsigned long lmqt, lmi, now = jiffies;
1864 struct net_bridge_group_src *ent;
1865
adc47037
NA		 1866 if (!netif_running(brmctx->br->dev) ||
1867 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
5bf1e00b
NA		 1868 return;
1869
085b53c8 1870 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 1871 other_query = &brmctx->ip4_other_query;
5bf1e00b
NA		 1872#if IS_ENABLED(CONFIG_IPV6)
1873 else
d3d065c0 1874 other_query = &brmctx->ip6_other_query;
5bf1e00b
NA		 1875#endif
1876
adc47037 1877 lmqt = now + br_multicast_lmqt(brmctx);
5bf1e00b
NA		 1878 hlist_for_each_entry(ent, &pg->src_list, node) {
1879 if (ent->flags & BR_SGRP_F_SEND) {
1880 ent->flags &= ~BR_SGRP_F_SEND;
1881 if (ent->timer.expires > lmqt) {
adc47037
NA		 1882 if (br_opt_get(brmctx->br,
1883 BROPT_MULTICAST_QUERIER) &&
5bf1e00b
NA		 1884 other_query &&
1885 !timer_pending(&other_query->timer))
1886 ent->src_query_rexmit_cnt = lmqc;
b0812368 1887 __grp_src_mod_timer(ent, lmqt);
5bf1e00b
NA		 1888 }
1889 }
1890 }
1891
adc47037 1892 if (!br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER) ||
5bf1e00b
NA		 1893 !other_query || timer_pending(&other_query->timer))
1894 return;
1895
adc47037 1896 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1897 &pg->key.addr, true, 1, NULL);
5bf1e00b 1898
d3d065c0 1899 lmi = now + brmctx->multicast_last_member_interval;
5bf1e00b
NA		 1900 if (!timer_pending(&pg->rexmit_timer) ||
1901 time_after(pg->rexmit_timer.expires, lmi))
1902 mod_timer(&pg->rexmit_timer, lmi);
1903}
1904
adc47037
NA		 1905static void __grp_send_query_and_rexmit(struct net_bridge_mcast *brmctx,
1906 struct net_bridge_mcast_port *pmctx,
1907 struct net_bridge_port_group *pg)
5bf1e00b
NA		 1908{
1909 struct bridge_mcast_other_query *other_query = NULL;
5bf1e00b
NA		 1910 unsigned long now = jiffies, lmi;
1911
adc47037
NA		 1912 if (!netif_running(brmctx->br->dev) ||
1913 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
5bf1e00b
NA		 1914 return;
1915
085b53c8 1916 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 1917 other_query = &brmctx->ip4_other_query;
5bf1e00b
NA		 1918#if IS_ENABLED(CONFIG_IPV6)
1919 else
d3d065c0 1920 other_query = &brmctx->ip6_other_query;
5bf1e00b
NA		 1921#endif
1922
adc47037 1923 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER) &&
5bf1e00b 1924 other_query && !timer_pending(&other_query->timer)) {
d3d065c0
NA		 1925 lmi = now + brmctx->multicast_last_member_interval;
1926 pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1;
adc47037 1927 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1928 &pg->key.addr, false, 0, NULL);
5bf1e00b
NA		 1929 if (!timer_pending(&pg->rexmit_timer) ||
1930 time_after(pg->rexmit_timer.expires, lmi))
1931 mod_timer(&pg->rexmit_timer, lmi);
1932 }
1933
1934 if (pg->filter_mode == MCAST_EXCLUDE &&
1935 (!timer_pending(&pg->timer) ||
adc47037
NA		 1936 time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx))))
1937 mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx));
5bf1e00b
NA		 1938}
1939
0436862e
NA		 1940/* State Msg type New state Actions
1941 * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
1942 * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
1943 * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
1944 */
adc47037
NA		 1945static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx,
1946 struct net_bridge_port_group *pg, void *h_addr,
474ddb37
NA		 1947 void *srcs, u32 nsrcs, size_t addr_size,
1948 int grec_type)
0436862e 1949{
0436862e
NA		 1950 struct net_bridge_group_src *ent;
1951 unsigned long now = jiffies;
1952 bool changed = false;
1953 struct br_ip src_ip;
1954 u32 src_idx;
1955
1956 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 1957 src_ip.proto = pg->key.addr.proto;
0436862e 1958 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 1959 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
0436862e
NA		 1960 ent = br_multicast_find_group_src(pg, &src_ip);
1961 if (!ent) {
1962 ent = br_multicast_new_group_src(pg, &src_ip);
1963 if (ent)
1964 changed = true;
1965 }
1966
1967 if (ent)
adc47037 1968 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
0436862e
NA		 1969 }
1970
adc47037
NA		 1971 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
1972 grec_type))
474ddb37
NA		 1973 changed = true;
1974
0436862e
NA		 1975 return changed;
1976}
1977
e6231bca
NA		 1978/* State Msg type New state Actions
1979 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
1980 * Delete (A-B)
1981 * Group Timer=GMI
1982 */
adc47037
NA		 1983static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx,
1984 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 1985 void *srcs, u32 nsrcs, size_t addr_size,
1986 int grec_type)
e6231bca
NA		 1987{
1988 struct net_bridge_group_src *ent;
1989 struct br_ip src_ip;
1990 u32 src_idx;
1991
1992 hlist_for_each_entry(ent, &pg->src_list, node)
1993 ent->flags |= BR_SGRP_F_DELETE;
1994
1995 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 1996 src_ip.proto = pg->key.addr.proto;
e6231bca 1997 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 1998 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
e6231bca
NA		 1999 ent = br_multicast_find_group_src(pg, &src_ip);
2000 if (ent)
2001 ent->flags &= ~BR_SGRP_F_DELETE;
2002 else
b0812368
NA		 2003 ent = br_multicast_new_group_src(pg, &src_ip);
2004 if (ent)
2005 br_multicast_fwd_src_handle(ent);
e6231bca
NA		 2006 }
2007
adc47037
NA		 2008 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2009 grec_type);
ddc255d9 2010
e6231bca
NA		 2011 __grp_src_delete_marked(pg);
2012}
2013
2014/* State Msg type New state Actions
2015 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
2016 * Delete (X-A)
2017 * Delete (Y-A)
2018 * Group Timer=GMI
2019 */
adc47037
NA		 2020static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx,
2021 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2022 void *srcs, u32 nsrcs, size_t addr_size,
2023 int grec_type)
e6231bca 2024{
e6231bca
NA		 2025 struct net_bridge_group_src *ent;
2026 unsigned long now = jiffies;
2027 bool changed = false;
2028 struct br_ip src_ip;
2029 u32 src_idx;
2030
2031 hlist_for_each_entry(ent, &pg->src_list, node)
2032 ent->flags |= BR_SGRP_F_DELETE;
2033
2034 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2035 src_ip.proto = pg->key.addr.proto;
e6231bca 2036 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2037 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
e6231bca
NA		 2038 ent = br_multicast_find_group_src(pg, &src_ip);
2039 if (ent) {
2040 ent->flags &= ~BR_SGRP_F_DELETE;
2041 } else {
2042 ent = br_multicast_new_group_src(pg, &src_ip);
2043 if (ent) {
b0812368 2044 __grp_src_mod_timer(ent,
adc47037 2045 now + br_multicast_gmi(brmctx));
e6231bca
NA		 2046 changed = true;
2047 }
2048 }
e6231bca
NA		 2049 }
2050
adc47037
NA		 2051 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2052 grec_type))
ddc255d9
NA		 2053 changed = true;
2054
e6231bca
NA		 2055 if (__grp_src_delete_marked(pg))
2056 changed = true;
2057
2058 return changed;
2059}
2060
adc47037
NA		 2061static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx,
2062 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2063 void *srcs, u32 nsrcs, size_t addr_size,
2064 int grec_type)
e6231bca 2065{
e6231bca
NA		 2066 bool changed = false;
2067
2068 switch (pg->filter_mode) {
2069 case MCAST_INCLUDE:
adc47037 2070 __grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
ddc255d9 2071 grec_type);
8266a049 2072 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
e6231bca
NA		 2073 changed = true;
2074 break;
2075 case MCAST_EXCLUDE:
adc47037
NA		 2076 changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs,
2077 addr_size, grec_type);
e6231bca
NA		 2078 break;
2079 }
2080
2081 pg->filter_mode = MCAST_EXCLUDE;
adc47037 2082 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
e6231bca
NA		 2083
2084 return changed;
2085}
2086
5bf1e00b
NA		 2087/* State Msg type New state Actions
2088 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
2089 * Send Q(G,A-B)
2090 */
adc47037
NA		 2091static bool __grp_src_toin_incl(struct net_bridge_mcast *brmctx,
2092 struct net_bridge_mcast_port *pmctx,
2093 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2094 void *srcs, u32 nsrcs, size_t addr_size,
2095 int grec_type)
5bf1e00b 2096{
5bf1e00b
NA		 2097 u32 src_idx, to_send = pg->src_ents;
2098 struct net_bridge_group_src *ent;
2099 unsigned long now = jiffies;
2100 bool changed = false;
2101 struct br_ip src_ip;
2102
2103 hlist_for_each_entry(ent, &pg->src_list, node)
2104 ent->flags |= BR_SGRP_F_SEND;
2105
2106 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2107 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2108 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2109 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2110 ent = br_multicast_find_group_src(pg, &src_ip);
2111 if (ent) {
2112 ent->flags &= ~BR_SGRP_F_SEND;
2113 to_send--;
2114 } else {
2115 ent = br_multicast_new_group_src(pg, &src_ip);
2116 if (ent)
2117 changed = true;
2118 }
2119 if (ent)
adc47037 2120 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2121 }
2122
adc47037
NA		 2123 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2124 grec_type))
ddc255d9
NA		 2125 changed = true;
2126
5bf1e00b 2127 if (to_send)
adc47037 2128 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2129
2130 return changed;
2131}
2132
2133/* State Msg type New state Actions
2134 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
2135 * Send Q(G,X-A)
2136 * Send Q(G)
2137 */
adc47037
NA		 2138static bool __grp_src_toin_excl(struct net_bridge_mcast *brmctx,
2139 struct net_bridge_mcast_port *pmctx,
2140 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2141 void *srcs, u32 nsrcs, size_t addr_size,
2142 int grec_type)
5bf1e00b 2143{
5bf1e00b
NA		 2144 u32 src_idx, to_send = pg->src_ents;
2145 struct net_bridge_group_src *ent;
2146 unsigned long now = jiffies;
2147 bool changed = false;
2148 struct br_ip src_ip;
2149
2150 hlist_for_each_entry(ent, &pg->src_list, node)
2151 if (timer_pending(&ent->timer))
2152 ent->flags |= BR_SGRP_F_SEND;
2153
2154 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2155 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2156 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2157 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2158 ent = br_multicast_find_group_src(pg, &src_ip);
2159 if (ent) {
2160 if (timer_pending(&ent->timer)) {
2161 ent->flags &= ~BR_SGRP_F_SEND;
2162 to_send--;
2163 }
2164 } else {
2165 ent = br_multicast_new_group_src(pg, &src_ip);
2166 if (ent)
2167 changed = true;
2168 }
2169 if (ent)
adc47037 2170 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2171 }
2172
adc47037
NA		 2173 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2174 grec_type))
ddc255d9
NA		 2175 changed = true;
2176
5bf1e00b 2177 if (to_send)
adc47037 2178 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b 2179
adc47037 2180 __grp_send_query_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2181
2182 return changed;
2183}
2184
adc47037
NA		 2185static bool br_multicast_toin(struct net_bridge_mcast *brmctx,
2186 struct net_bridge_mcast_port *pmctx,
2187 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2188 void *srcs, u32 nsrcs, size_t addr_size,
2189 int grec_type)
5bf1e00b
NA		 2190{
2191 bool changed = false;
2192
2193 switch (pg->filter_mode) {
2194 case MCAST_INCLUDE:
adc47037
NA		 2195 changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs,
2196 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2197 break;
2198 case MCAST_EXCLUDE:
adc47037
NA		 2199 changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs,
2200 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2201 break;
2202 }
2203
ddc255d9 2204 if (br_multicast_eht_should_del_pg(pg)) {
d5a10222 2205 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
ddc255d9
NA		 2206 br_multicast_find_del_pg(pg->key.port->br, pg);
2207 /* a notification has already been sent and we shouldn't
2208 * access pg after the delete so we have to return false
2209 */
2210 changed = false;
2211 }
2212
5bf1e00b
NA		 2213 return changed;
2214}
2215
2216/* State Msg type New state Actions
2217 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2218 * Delete (A-B)
2219 * Send Q(G,A*B)
2220 * Group Timer=GMI
2221 */
adc47037
NA		 2222static void __grp_src_toex_incl(struct net_bridge_mcast *brmctx,
2223 struct net_bridge_mcast_port *pmctx,
2224 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2225 void *srcs, u32 nsrcs, size_t addr_size,
2226 int grec_type)
5bf1e00b
NA		 2227{
2228 struct net_bridge_group_src *ent;
2229 u32 src_idx, to_send = 0;
2230 struct br_ip src_ip;
2231
2232 hlist_for_each_entry(ent, &pg->src_list, node)
2233 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2234
2235 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2236 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2237 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2238 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2239 ent = br_multicast_find_group_src(pg, &src_ip);
2240 if (ent) {
2241 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2242 BR_SGRP_F_SEND;
2243 to_send++;
2244 } else {
b0812368 2245 ent = br_multicast_new_group_src(pg, &src_ip);
5bf1e00b 2246 }
b0812368
NA		 2247 if (ent)
2248 br_multicast_fwd_src_handle(ent);
5bf1e00b
NA		 2249 }
2250
adc47037
NA		 2251 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2252 grec_type);
ddc255d9 2253
5bf1e00b
NA		 2254 __grp_src_delete_marked(pg);
2255 if (to_send)
adc47037 2256 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2257}
2258
2259/* State Msg type New state Actions
2260 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2261 * Delete (X-A)
2262 * Delete (Y-A)
2263 * Send Q(G,A-Y)
2264 * Group Timer=GMI
2265 */
adc47037
NA		 2266static bool __grp_src_toex_excl(struct net_bridge_mcast *brmctx,
2267 struct net_bridge_mcast_port *pmctx,
2268 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2269 void *srcs, u32 nsrcs, size_t addr_size,
2270 int grec_type)
5bf1e00b
NA		 2271{
2272 struct net_bridge_group_src *ent;
2273 u32 src_idx, to_send = 0;
2274 bool changed = false;
2275 struct br_ip src_ip;
2276
2277 hlist_for_each_entry(ent, &pg->src_list, node)
2278 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2279
2280 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2281 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2282 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2283 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2284 ent = br_multicast_find_group_src(pg, &src_ip);
2285 if (ent) {
2286 ent->flags &= ~BR_SGRP_F_DELETE;
2287 } else {
2288 ent = br_multicast_new_group_src(pg, &src_ip);
2289 if (ent) {
b0812368 2290 __grp_src_mod_timer(ent, pg->timer.expires);
5bf1e00b
NA		 2291 changed = true;
2292 }
2293 }
2294 if (ent && timer_pending(&ent->timer)) {
2295 ent->flags |= BR_SGRP_F_SEND;
2296 to_send++;
2297 }
5bf1e00b
NA		 2298 }
2299
adc47037
NA		 2300 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2301 grec_type))
ddc255d9
NA		 2302 changed = true;
2303
5bf1e00b
NA		 2304 if (__grp_src_delete_marked(pg))
2305 changed = true;
2306 if (to_send)
adc47037 2307 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2308
2309 return changed;
2310}
2311
adc47037
NA		 2312static bool br_multicast_toex(struct net_bridge_mcast *brmctx,
2313 struct net_bridge_mcast_port *pmctx,
2314 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2315 void *srcs, u32 nsrcs, size_t addr_size,
2316 int grec_type)
5bf1e00b 2317{
5bf1e00b
NA		 2318 bool changed = false;
2319
2320 switch (pg->filter_mode) {
2321 case MCAST_INCLUDE:
adc47037
NA		 2322 __grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs,
2323 addr_size, grec_type);
8266a049 2324 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
5bf1e00b
NA		 2325 changed = true;
2326 break;
2327 case MCAST_EXCLUDE:
adc47037
NA		 2328 changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs,
2329 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2330 break;
2331 }
2332
2333 pg->filter_mode = MCAST_EXCLUDE;
adc47037 2334 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2335
2336 return changed;
2337}
2338
109865fe
NA		 2339/* State Msg type New state Actions
2340 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2341 */
adc47037
NA		 2342static bool __grp_src_block_incl(struct net_bridge_mcast *brmctx,
2343 struct net_bridge_mcast_port *pmctx,
2344 struct net_bridge_port_group *pg, void *h_addr,
474ddb37 2345 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2346{
2347 struct net_bridge_group_src *ent;
2348 u32 src_idx, to_send = 0;
0ad57c99 2349 bool changed = false;
109865fe
NA		 2350 struct br_ip src_ip;
2351
2352 hlist_for_each_entry(ent, &pg->src_list, node)
2353 ent->flags &= ~BR_SGRP_F_SEND;
2354
2355 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2356 src_ip.proto = pg->key.addr.proto;
109865fe 2357 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2358 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
109865fe
NA		 2359 ent = br_multicast_find_group_src(pg, &src_ip);
2360 if (ent) {
2361 ent->flags |= BR_SGRP_F_SEND;
2362 to_send++;
2363 }
109865fe
NA		 2364 }
2365
adc47037
NA		 2366 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2367 grec_type))
474ddb37
NA		 2368 changed = true;
2369
109865fe 2370 if (to_send)
adc47037 2371 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
109865fe 2372
0ad57c99 2373 return changed;
109865fe
NA		 2374}
2375
2376/* State Msg type New state Actions
2377 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2378 * Send Q(G,A-Y)
2379 */
adc47037
NA		 2380static bool __grp_src_block_excl(struct net_bridge_mcast *brmctx,
2381 struct net_bridge_mcast_port *pmctx,
2382 struct net_bridge_port_group *pg, void *h_addr,
474ddb37 2383 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2384{
2385 struct net_bridge_group_src *ent;
2386 u32 src_idx, to_send = 0;
2387 bool changed = false;
2388 struct br_ip src_ip;
2389
2390 hlist_for_each_entry(ent, &pg->src_list, node)
2391 ent->flags &= ~BR_SGRP_F_SEND;
2392
2393 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2394 src_ip.proto = pg->key.addr.proto;
109865fe 2395 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2396 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
109865fe
NA		 2397 ent = br_multicast_find_group_src(pg, &src_ip);
2398 if (!ent) {
2399 ent = br_multicast_new_group_src(pg, &src_ip);
2400 if (ent) {
b0812368 2401 __grp_src_mod_timer(ent, pg->timer.expires);
109865fe
NA		 2402 changed = true;
2403 }
2404 }
2405 if (ent && timer_pending(&ent->timer)) {
2406 ent->flags |= BR_SGRP_F_SEND;
2407 to_send++;
2408 }
109865fe
NA		 2409 }
2410
adc47037
NA		 2411 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2412 grec_type))
474ddb37
NA		 2413 changed = true;
2414
109865fe 2415 if (to_send)
adc47037 2416 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
109865fe
NA		 2417
2418 return changed;
2419}
2420
adc47037
NA		 2421static bool br_multicast_block(struct net_bridge_mcast *brmctx,
2422 struct net_bridge_mcast_port *pmctx,
2423 struct net_bridge_port_group *pg, void *h_addr,
474ddb37 2424 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2425{
2426 bool changed = false;
2427
2428 switch (pg->filter_mode) {
2429 case MCAST_INCLUDE:
adc47037
NA		 2430 changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs,
2431 nsrcs, addr_size, grec_type);
109865fe
NA		 2432 break;
2433 case MCAST_EXCLUDE:
adc47037
NA		 2434 changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs,
2435 nsrcs, addr_size, grec_type);
109865fe
NA		 2436 break;
2437 }
2438
e87e4b5c
NA		 2439 if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
2440 br_multicast_eht_should_del_pg(pg)) {
d5a10222
NA		 2441 if (br_multicast_eht_should_del_pg(pg))
2442 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
e87e4b5c
NA		 2443 br_multicast_find_del_pg(pg->key.port->br, pg);
2444 /* a notification has already been sent and we shouldn't
2445 * access pg after the delete so we have to return false
2446 */
2447 changed = false;
2448 }
2449
109865fe
NA		 2450 return changed;
2451}
2452
0436862e
NA		 2453static struct net_bridge_port_group *
2454br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2455 struct net_bridge_port *p,
2456 const unsigned char *src)
2457{
071445c6 2458 struct net_bridge *br __maybe_unused = mp->br;
0436862e 2459 struct net_bridge_port_group *pg;
0436862e
NA		 2460
2461 for (pg = mlock_dereference(mp->ports, br);
2462 pg;
2463 pg = mlock_dereference(pg->next, br))
2464 if (br_port_group_equal(pg, p, src))
2465 return pg;
2466
2467 return NULL;
2468}
2469
adc47037
NA		 2470static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx,
2471 struct net_bridge_mcast_port *pmctx,
06499098
VY		 2472 struct sk_buff *skb,
2473 u16 vid)
eb1d1641 2474{
adc47037 2475 bool igmpv2 = brmctx->multicast_igmp_version == 2;
0436862e
NA		 2476 struct net_bridge_mdb_entry *mdst;
2477 struct net_bridge_port_group *pg;
6db6f0ea 2478 const unsigned char *src;
eb1d1641
HX		 2479 struct igmpv3_report *ih;
2480 struct igmpv3_grec *grec;
0436862e 2481 int i, len, num, type;
54bea721 2482 __be32 group, *h_addr;
0436862e 2483 bool changed = false;
0436862e 2484 int err = 0;
e57f6185 2485 u16 nsrcs;
eb1d1641 2486
eb1d1641
HX		 2487 ih = igmpv3_report_hdr(skb);
2488 num = ntohs(ih->ngrec);
c2d4fbd2 2489 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 2490
2491 for (i = 0; i < num; i++) {
2492 len += sizeof(*grec);
ba5ea614 2493 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2494 return -EINVAL;
2495
fd218cf9 2496 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 2497 group = grec->grec_mca;
2498 type = grec->grec_type;
e57f6185 2499 nsrcs = ntohs(grec->grec_nsrcs);
eb1d1641 2500
e57f6185 2501 len += nsrcs * 4;
ba5ea614 2502 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2503 return -EINVAL;
2504
eb1d1641
HX		 2505 switch (type) {
2506 case IGMPV3_MODE_IS_INCLUDE:
2507 case IGMPV3_MODE_IS_EXCLUDE:
2508 case IGMPV3_CHANGE_TO_INCLUDE:
2509 case IGMPV3_CHANGE_TO_EXCLUDE:
2510 case IGMPV3_ALLOW_NEW_SOURCES:
2511 case IGMPV3_BLOCK_OLD_SOURCES:
2512 break;
2513
2514 default:
2515 continue;
2516 }
2517
6db6f0ea 2518 src = eth_hdr(skb)->h_source;
0436862e
NA		 2519 if (nsrcs == 0 &&
2520 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2521 type == IGMPV3_MODE_IS_INCLUDE)) {
adc47037
NA		 2522 if (!pmctx || igmpv2) {
2523 br_ip4_multicast_leave_group(brmctx, pmctx,
2524 group, vid, src);
0436862e
NA		 2525 continue;
2526 }
bc8c20ac 2527 } else {
adc47037
NA		 2528 err = br_ip4_multicast_add_group(brmctx, pmctx, group,
2529 vid, src, igmpv2);
bc8c20ac
SA		 2530 if (err)
2531 break;
2532 }
0436862e 2533
adc47037 2534 if (!pmctx || igmpv2)
0436862e
NA		 2535 continue;
2536
adc47037
NA		 2537 spin_lock_bh(&brmctx->br->multicast_lock);
2538 mdst = br_mdb_ip4_get(brmctx->br, group, vid);
0436862e
NA		 2539 if (!mdst)
2540 goto unlock_continue;
adc47037 2541 pg = br_multicast_find_port(mdst, pmctx->port, src);
0436862e
NA		 2542 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2543 goto unlock_continue;
54bea721 2544 /* reload grec and host addr */
0436862e 2545 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
54bea721 2546 h_addr = &ip_hdr(skb)->saddr;
0436862e
NA		 2547 switch (type) {
2548 case IGMPV3_ALLOW_NEW_SOURCES:
adc47037
NA		 2549 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2550 grec->grec_src,
474ddb37 2551 nsrcs, sizeof(__be32), type);
0436862e 2552 break;
e6231bca 2553 case IGMPV3_MODE_IS_INCLUDE:
adc47037
NA		 2554 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2555 grec->grec_src,
474ddb37 2556 nsrcs, sizeof(__be32), type);
e6231bca
NA		 2557 break;
2558 case IGMPV3_MODE_IS_EXCLUDE:
adc47037
NA		 2559 changed = br_multicast_isexc(brmctx, pg, h_addr,
2560 grec->grec_src,
ddc255d9 2561 nsrcs, sizeof(__be32), type);
e6231bca 2562 break;
5bf1e00b 2563 case IGMPV3_CHANGE_TO_INCLUDE:
adc47037
NA		 2564 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
2565 grec->grec_src,
ddc255d9 2566 nsrcs, sizeof(__be32), type);
5bf1e00b
NA		 2567 break;
2568 case IGMPV3_CHANGE_TO_EXCLUDE:
adc47037
NA		 2569 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
2570 grec->grec_src,
ddc255d9 2571 nsrcs, sizeof(__be32), type);
5bf1e00b 2572 break;
109865fe 2573 case IGMPV3_BLOCK_OLD_SOURCES:
adc47037
NA		 2574 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
2575 grec->grec_src,
474ddb37 2576 nsrcs, sizeof(__be32), type);
109865fe 2577 break;
0436862e
NA		 2578 }
2579 if (changed)
adc47037 2580 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
0436862e 2581unlock_continue:
adc47037 2582 spin_unlock_bh(&brmctx->br->multicast_lock);
eb1d1641
HX		 2583 }
2584
2585 return err;
2586}
2587
dfd56b8b 2588#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 2589static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx,
2590 struct net_bridge_mcast_port *pmctx,
06499098
VY		 2591 struct sk_buff *skb,
2592 u16 vid)
08b202b6 2593{
adc47037 2594 bool mldv1 = brmctx->multicast_mld_version == 1;
0436862e
NA		 2595 struct net_bridge_mdb_entry *mdst;
2596 struct net_bridge_port_group *pg;
ba5ea614 2597 unsigned int nsrcs_offset;
6db6f0ea 2598 const unsigned char *src;
08b202b6 2599 struct icmp6hdr *icmp6h;
54bea721 2600 struct in6_addr *h_addr;
08b202b6 2601 struct mld2_grec *grec;
ba5ea614 2602 unsigned int grec_len;
0436862e
NA		 2603 bool changed = false;
2604 int i, len, num;
08b202b6
YH		 2605 int err = 0;
2606
ba5ea614 2607 if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
08b202b6
YH		 2608 return -EINVAL;
2609
2610 icmp6h = icmp6_hdr(skb);
2611 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
c2d4fbd2 2612 len = skb_transport_offset(skb) + sizeof(*icmp6h);
08b202b6
YH		 2613
2614 for (i = 0; i < num; i++) {
e57f6185
NA		 2615 __be16 *_nsrcs, __nsrcs;
2616 u16 nsrcs;
08b202b6 2617
ba5ea614
LL		 2618 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2619
2620 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
5fc6266a 2621 nsrcs_offset + sizeof(__nsrcs))
ba5ea614
LL		 2622 return -EINVAL;
2623
e57f6185
NA		 2624 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2625 sizeof(__nsrcs), &__nsrcs);
2626 if (!_nsrcs)
08b202b6
YH		 2627 return -EINVAL;
2628
e57f6185
NA		 2629 nsrcs = ntohs(*_nsrcs);
2630 grec_len = struct_size(grec, grec_src, nsrcs);
ba5ea614
LL		 2631
2632 if (!ipv6_mc_may_pull(skb, len + grec_len))
08b202b6
YH		 2633 return -EINVAL;
2634
2635 grec = (struct mld2_grec *)(skb->data + len);
ba5ea614 2636 len += grec_len;
08b202b6 2637
08b202b6
YH		 2638 switch (grec->grec_type) {
2639 case MLD2_MODE_IS_INCLUDE:
2640 case MLD2_MODE_IS_EXCLUDE:
2641 case MLD2_CHANGE_TO_INCLUDE:
2642 case MLD2_CHANGE_TO_EXCLUDE:
2643 case MLD2_ALLOW_NEW_SOURCES:
2644 case MLD2_BLOCK_OLD_SOURCES:
2645 break;
2646
2647 default:
2648 continue;
2649 }
2650
6db6f0ea 2651 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 2652 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2653 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
e57f6185 2654 nsrcs == 0) {
adc47037
NA		 2655 if (!pmctx || mldv1) {
2656 br_ip6_multicast_leave_group(brmctx, pmctx,
0436862e
NA		 2657 &grec->grec_mca,
2658 vid, src);
2659 continue;
2660 }
bc8c20ac 2661 } else {
adc47037 2662 err = br_ip6_multicast_add_group(brmctx, pmctx,
6db6f0ea 2663 &grec->grec_mca, vid,
0436862e 2664 src, mldv1);
9264251e 2665 if (err)
bc8c20ac
SA		 2666 break;
2667 }
0436862e 2668
adc47037 2669 if (!pmctx || mldv1)
0436862e
NA		 2670 continue;
2671
adc47037
NA		 2672 spin_lock_bh(&brmctx->br->multicast_lock);
2673 mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid);
0436862e
NA		 2674 if (!mdst)
2675 goto unlock_continue;
adc47037 2676 pg = br_multicast_find_port(mdst, pmctx->port, src);
0436862e
NA		 2677 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2678 goto unlock_continue;
54bea721 2679 h_addr = &ipv6_hdr(skb)->saddr;
0436862e
NA		 2680 switch (grec->grec_type) {
2681 case MLD2_ALLOW_NEW_SOURCES:
adc47037 2682 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
54bea721 2683 grec->grec_src, nsrcs,
474ddb37
NA		 2684 sizeof(struct in6_addr),
2685 grec->grec_type);
0436862e 2686 break;
e6231bca 2687 case MLD2_MODE_IS_INCLUDE:
adc47037 2688 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
54bea721 2689 grec->grec_src, nsrcs,
474ddb37
NA		 2690 sizeof(struct in6_addr),
2691 grec->grec_type);
e6231bca
NA		 2692 break;
2693 case MLD2_MODE_IS_EXCLUDE:
adc47037 2694 changed = br_multicast_isexc(brmctx, pg, h_addr,
54bea721 2695 grec->grec_src, nsrcs,
ddc255d9
NA		 2696 sizeof(struct in6_addr),
2697 grec->grec_type);
e6231bca 2698 break;
5bf1e00b 2699 case MLD2_CHANGE_TO_INCLUDE:
adc47037 2700 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
54bea721 2701 grec->grec_src, nsrcs,
ddc255d9
NA		 2702 sizeof(struct in6_addr),
2703 grec->grec_type);
5bf1e00b
NA		 2704 break;
2705 case MLD2_CHANGE_TO_EXCLUDE:
adc47037 2706 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
54bea721 2707 grec->grec_src, nsrcs,
ddc255d9
NA		 2708 sizeof(struct in6_addr),
2709 grec->grec_type);
5bf1e00b 2710 break;
109865fe 2711 case MLD2_BLOCK_OLD_SOURCES:
adc47037 2712 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
54bea721 2713 grec->grec_src, nsrcs,
474ddb37
NA		 2714 sizeof(struct in6_addr),
2715 grec->grec_type);
109865fe 2716 break;
0436862e
NA		 2717 }
2718 if (changed)
adc47037 2719 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
0436862e 2720unlock_continue:
adc47037 2721 spin_unlock_bh(&brmctx->br->multicast_lock);
08b202b6
YH		 2722 }
2723
2724 return err;
2725}
2726#endif
2727
adc47037 2728static bool br_ip4_multicast_select_querier(struct net_bridge_mcast *brmctx,
2cd41431 2729 struct net_bridge_port *port,
dc4eb53a
LL		 2730 __be32 saddr)
2731{
d3d065c0
NA		 2732 if (!timer_pending(&brmctx->ip4_own_query.timer) &&
2733 !timer_pending(&brmctx->ip4_other_query.timer))
dc4eb53a
LL		 2734 goto update;
2735
d3d065c0 2736 if (!brmctx->ip4_querier.addr.src.ip4)
dc4eb53a
LL		 2737 goto update;
2738
d3d065c0 2739 if (ntohl(saddr) <= ntohl(brmctx->ip4_querier.addr.src.ip4))
dc4eb53a
LL		 2740 goto update;
2741
2742 return false;
2743
2744update:
d3d065c0 2745 brmctx->ip4_querier.addr.src.ip4 = saddr;
dc4eb53a 2746
2cd41431 2747 /* update protected by general multicast_lock by caller */
d3d065c0 2748 rcu_assign_pointer(brmctx->ip4_querier.port, port);
2cd41431 2749
dc4eb53a
LL		 2750 return true;
2751}
2752
2753#if IS_ENABLED(CONFIG_IPV6)
adc47037 2754static bool br_ip6_multicast_select_querier(struct net_bridge_mcast *brmctx,
2cd41431 2755 struct net_bridge_port *port,
dc4eb53a
LL		 2756 struct in6_addr *saddr)
2757{
d3d065c0
NA		 2758 if (!timer_pending(&brmctx->ip6_own_query.timer) &&
2759 !timer_pending(&brmctx->ip6_other_query.timer))
dc4eb53a
LL		 2760 goto update;
2761
d3d065c0 2762 if (ipv6_addr_cmp(saddr, &brmctx->ip6_querier.addr.src.ip6) <= 0)
dc4eb53a
LL		 2763 goto update;
2764
2765 return false;
2766
2767update:
d3d065c0 2768 brmctx->ip6_querier.addr.src.ip6 = *saddr;
dc4eb53a 2769
2cd41431 2770 /* update protected by general multicast_lock by caller */
d3d065c0 2771 rcu_assign_pointer(brmctx->ip6_querier.port, port);
2cd41431 2772
dc4eb53a
LL		 2773 return true;
2774}
2775#endif
2776
cc0fdd80 2777static void
adc47037 2778br_multicast_update_query_timer(struct net_bridge_mcast *brmctx,
90010b36
LL		 2779 struct bridge_mcast_other_query *query,
2780 unsigned long max_delay)
b00589af 2781{
90010b36
LL		 2782 if (!timer_pending(&query->timer))
2783 query->delay_time = jiffies + max_delay;
b00589af 2784
adc47037 2785 mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval);
b00589af
LL		 2786}
2787
6d549648
NF		 2788static void br_port_mc_router_state_change(struct net_bridge_port *p,
2789 bool is_mc_router)
2790{
2791 struct switchdev_attr attr = {
2792 .orig_dev = p->dev,
2793 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
2794 .flags = SWITCHDEV_F_DEFER,
2795 .u.mrouter = is_mc_router,
2796 };
2797
dcbdf135 2798 switchdev_port_attr_set(p->dev, &attr, NULL);
6d549648
NF		 2799}
2800
d9b8c4d8 2801static struct net_bridge_port *
d3d065c0 2802br_multicast_rport_from_node(struct net_bridge_mcast *brmctx,
d9b8c4d8
LL		 2803 struct hlist_head *mc_router_list,
2804 struct hlist_node *rlist)
2805{
9632233e
NA		 2806 struct net_bridge_mcast_port *pmctx;
2807
a3c02e76 2808#if IS_ENABLED(CONFIG_IPV6)
d3d065c0 2809 if (mc_router_list == &brmctx->ip6_mc_router_list)
9632233e
NA		 2810 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
2811 ip6_rlist);
2812 else
a3c02e76 2813#endif
9632233e
NA		 2814 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
2815 ip4_rlist);
2816
2817 return pmctx->port;
d9b8c4d8
LL		 2818}
2819
2820static struct hlist_node *
d3d065c0 2821br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx,
d9b8c4d8
LL		 2822 struct net_bridge_port *port,
2823 struct hlist_head *mc_router_list)
2824
2825{
2826 struct hlist_node *slot = NULL;
2827 struct net_bridge_port *p;
2828 struct hlist_node *rlist;
2829
2830 hlist_for_each(rlist, mc_router_list) {
d3d065c0 2831 p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist);
d9b8c4d8
LL		 2832
2833 if ((unsigned long)port >= (unsigned long)p)
2834 break;
2835
2836 slot = rlist;
2837 }
2838
2839 return slot;
2840}
2841
adc47037 2842static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx,
a3c02e76
LL		 2843 struct hlist_node *rnode)
2844{
2845#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 2846 if (rnode != &pmctx->ip6_rlist)
2847 return hlist_unhashed(&pmctx->ip6_rlist);
a3c02e76 2848 else
adc47037 2849 return hlist_unhashed(&pmctx->ip4_rlist);
a3c02e76
LL		 2850#else
2851 return true;
2852#endif
2853}
2854
d9b8c4d8 2855/* Add port to router_list
7e80c124 2856 * list is maintained ordered by pointer value
2857 * and locked by br->multicast_lock and RCU
2858 */
d3d065c0 2859static void br_multicast_add_router(struct net_bridge_mcast *brmctx,
adc47037 2860 struct net_bridge_mcast_port *pmctx,
d9b8c4d8
LL		 2861 struct hlist_node *rlist,
2862 struct hlist_head *mc_router_list)
0909e117 2863{
d9b8c4d8 2864 struct hlist_node *slot;
dcdca2c4 2865
d9b8c4d8 2866 if (!hlist_unhashed(rlist))
1a040eac
NA		 2867 return;
2868
adc47037 2869 slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list);
dcdca2c4 2870
7e80c124 2871 if (slot)
d9b8c4d8 2872 hlist_add_behind_rcu(rlist, slot);
dcdca2c4 2873 else
d9b8c4d8
LL		 2874 hlist_add_head_rcu(rlist, mc_router_list);
2875
a3c02e76
LL		 2876 /* For backwards compatibility for now, only notify if we
2877 * switched from no IPv4/IPv6 multicast router to a new
2878 * IPv4 or IPv6 multicast router.
2879 */
adc47037
NA		 2880 if (br_multicast_no_router_otherpf(pmctx, rlist)) {
2881 br_rtr_notify(pmctx->port->br->dev, pmctx->port, RTM_NEWMDB);
2882 br_port_mc_router_state_change(pmctx->port, true);
a3c02e76 2883 }
0909e117
HX		 2884}
2885
d9b8c4d8
LL		 2886/* Add port to router_list
2887 * list is maintained ordered by pointer value
2888 * and locked by br->multicast_lock and RCU
2889 */
adc47037
NA		 2890static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
2891 struct net_bridge_mcast_port *pmctx)
d9b8c4d8 2892{
adc47037
NA		 2893 br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist,
2894 &brmctx->ip4_mc_router_list);
d9b8c4d8
LL		 2895}
2896
a3c02e76
LL		 2897/* Add port to router_list
2898 * list is maintained ordered by pointer value
2899 * and locked by br->multicast_lock and RCU
2900 */
adc47037
NA		 2901static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
2902 struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 2903{
2904#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 2905 br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist,
2906 &brmctx->ip6_mc_router_list);
a3c02e76
LL		 2907#endif
2908}
2909
adc47037
NA		 2910static void br_multicast_mark_router(struct net_bridge_mcast *brmctx,
2911 struct net_bridge_mcast_port *pmctx,
d9b8c4d8
LL		 2912 struct timer_list *timer,
2913 struct hlist_node *rlist,
2914 struct hlist_head *mc_router_list)
eb1d1641
HX		 2915{
2916 unsigned long now = jiffies;
eb1d1641 2917
adc47037 2918 if (!pmctx) {
d3d065c0
NA		 2919 if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
2920 if (!br_ip4_multicast_is_router(brmctx) &&
2921 !br_ip6_multicast_is_router(brmctx))
adc47037 2922 br_mc_router_state_change(brmctx->br, true);
d3d065c0 2923 mod_timer(timer, now + brmctx->multicast_querier_interval);
77041420 2924 }
eb1d1641
HX		 2925 return;
2926 }
2927
adc47037
NA		 2928 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
2929 pmctx->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 2930 return;
2931
adc47037 2932 br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list);
d3d065c0 2933 mod_timer(timer, now + brmctx->multicast_querier_interval);
d9b8c4d8
LL		 2934}
2935
adc47037
NA		 2936static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx,
2937 struct net_bridge_mcast_port *pmctx)
d9b8c4d8 2938{
adc47037 2939 struct timer_list *timer = &brmctx->ip4_mc_router_timer;
d9b8c4d8
LL		 2940 struct hlist_node *rlist = NULL;
2941
adc47037
NA		 2942 if (pmctx) {
2943 timer = &pmctx->ip4_mc_router_timer;
2944 rlist = &pmctx->ip4_rlist;
d9b8c4d8 2945 }
eb1d1641 2946
adc47037
NA		 2947 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
2948 &brmctx->ip4_mc_router_list);
eb1d1641
HX		 2949}
2950
adc47037
NA		 2951static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx,
2952 struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 2953{
2954#if IS_ENABLED(CONFIG_IPV6)
adc47037 2955 struct timer_list *timer = &brmctx->ip6_mc_router_timer;
a3c02e76
LL		 2956 struct hlist_node *rlist = NULL;
2957
adc47037
NA		 2958 if (pmctx) {
2959 timer = &pmctx->ip6_mc_router_timer;
2960 rlist = &pmctx->ip6_rlist;
a3c02e76
LL		 2961 }
2962
adc47037
NA		 2963 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
2964 &brmctx->ip6_mc_router_list);
a3c02e76
LL		 2965#endif
2966}
2967
b19232ef 2968static void
adc47037
NA		 2969br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx,
2970 struct net_bridge_mcast_port *pmctx,
b19232ef
LL		 2971 struct bridge_mcast_other_query *query,
2972 struct br_ip *saddr,
2973 unsigned long max_delay)
2974{
adc47037 2975 if (!br_ip4_multicast_select_querier(brmctx, pmctx->port, saddr->src.ip4))
b19232ef
LL		 2976 return;
2977
adc47037
NA		 2978 br_multicast_update_query_timer(brmctx, query, max_delay);
2979 br_ip4_multicast_mark_router(brmctx, pmctx);
b19232ef
LL		 2980}
2981
2982#if IS_ENABLED(CONFIG_IPV6)
2983static void
adc47037
NA		 2984br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx,
2985 struct net_bridge_mcast_port *pmctx,
b19232ef
LL		 2986 struct bridge_mcast_other_query *query,
2987 struct br_ip *saddr,
2988 unsigned long max_delay)
eb1d1641 2989{
adc47037 2990 if (!br_ip6_multicast_select_querier(brmctx, pmctx->port, &saddr->src.ip6))
eb1d1641
HX		 2991 return;
2992
adc47037
NA		 2993 br_multicast_update_query_timer(brmctx, query, max_delay);
2994 br_ip6_multicast_mark_router(brmctx, pmctx);
eb1d1641 2995}
b19232ef 2996#endif
eb1d1641 2997
adc47037
NA		 2998static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx,
2999 struct net_bridge_mcast_port *pmctx,
9c2e955c 3000 struct sk_buff *skb,
3001 u16 vid)
eb1d1641 3002{
ba5ea614 3003 unsigned int transport_len = ip_transport_len(skb);
b71d1d42 3004 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 3005 struct igmphdr *ih = igmp_hdr(skb);
3006 struct net_bridge_mdb_entry *mp;
3007 struct igmpv3_query *ih3;
3008 struct net_bridge_port_group *p;
e8051688 3009 struct net_bridge_port_group __rcu **pp;
dc4eb53a 3010 struct br_ip saddr;
eb1d1641
HX		 3011 unsigned long max_delay;
3012 unsigned long now = jiffies;
3013 __be32 group;
3014
adc47037
NA		 3015 spin_lock(&brmctx->br->multicast_lock);
3016 if (!netif_running(brmctx->br->dev) ||
3017 (pmctx && pmctx->port->state == BR_STATE_DISABLED))
eb1d1641
HX		 3018 goto out;
3019
eb1d1641
HX		 3020 group = ih->group;
3021
ba5ea614 3022 if (transport_len == sizeof(*ih)) {
eb1d1641
HX		 3023 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
3024
3025 if (!max_delay) {
3026 max_delay = 10 * HZ;
3027 group = 0;
3028 }
ba5ea614 3029 } else if (transport_len >= sizeof(*ih3)) {
eb1d1641 3030 ih3 = igmpv3_query_hdr(skb);
23550b83 3031 if (ih3->nsrcs ||
d3d065c0
NA		 3032 (brmctx->multicast_igmp_version == 3 && group &&
3033 ih3->suppress))
bec68ff1 3034 goto out;
eb1d1641 3035
0ba8c9ec
YH		 3036 max_delay = ih3->code ?
3037 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 3038 } else {
9ed973cc
LL		 3039 goto out;
3040 }
3041
dc4eb53a
LL		 3042 if (!group) {
3043 saddr.proto = htons(ETH_P_IP);
deb96566 3044 saddr.src.ip4 = iph->saddr;
b00589af 3045
adc47037 3046 br_ip4_multicast_query_received(brmctx, pmctx,
d3d065c0 3047 &brmctx->ip4_other_query,
b19232ef 3048 &saddr, max_delay);
eb1d1641 3049 goto out;
dc4eb53a 3050 }
eb1d1641 3051
adc47037 3052 mp = br_mdb_ip4_get(brmctx->br, group, vid);
eb1d1641
HX		 3053 if (!mp)
3054 goto out;
3055
d3d065c0 3056 max_delay *= brmctx->multicast_last_member_count;
eb1d1641 3057
ff0fd34e 3058 if (mp->host_joined &&
eb1d1641
HX		 3059 (timer_pending(&mp->timer) ?
3060 time_after(mp->timer.expires, now + max_delay) :
3061 try_to_del_timer_sync(&mp->timer) >= 0))
3062 mod_timer(&mp->timer, now + max_delay);
3063
e8051688 3064 for (pp = &mp->ports;
adc47037 3065 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 3066 pp = &p->next) {
eb1d1641
HX		 3067 if (timer_pending(&p->timer) ?
3068 time_after(p->timer.expires, now + max_delay) :
23550b83 3069 try_to_del_timer_sync(&p->timer) >= 0 &&
d3d065c0 3070 (brmctx->multicast_igmp_version == 2 ||
23550b83 3071 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 3072 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 3073 }
3074
3075out:
adc47037 3076 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 3077}
3078
dfd56b8b 3079#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3080static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx,
3081 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3082 struct sk_buff *skb,
3083 u16 vid)
08b202b6 3084{
ba5ea614 3085 unsigned int transport_len = ipv6_transport_len(skb);
eca2a43b 3086 struct mld_msg *mld;
08b202b6
YH		 3087 struct net_bridge_mdb_entry *mp;
3088 struct mld2_query *mld2q;
e8051688
ED		 3089 struct net_bridge_port_group *p;
3090 struct net_bridge_port_group __rcu **pp;
dc4eb53a 3091 struct br_ip saddr;
08b202b6
YH		 3092 unsigned long max_delay;
3093 unsigned long now = jiffies;
856ce5d0 3094 unsigned int offset = skb_transport_offset(skb);
b71d1d42 3095 const struct in6_addr *group = NULL;
9ed973cc 3096 bool is_general_query;
08b202b6
YH		 3097 int err = 0;
3098
adc47037
NA		 3099 spin_lock(&brmctx->br->multicast_lock);
3100 if (!netif_running(brmctx->br->dev) ||
3101 (pmctx && pmctx->port->state == BR_STATE_DISABLED))
08b202b6
YH		 3102 goto out;
3103
ba5ea614 3104 if (transport_len == sizeof(*mld)) {
856ce5d0 3105 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 3106 err = -EINVAL;
3107 goto out;
3108 }
3109 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 3110 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 3111 if (max_delay)
3112 group = &mld->mld_mca;
248ba8ec 3113 } else {
856ce5d0 3114 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 3115 err = -EINVAL;
3116 goto out;
3117 }
3118 mld2q = (struct mld2_query *)icmp6_hdr(skb);
3119 if (!mld2q->mld2q_nsrcs)
3120 group = &mld2q->mld2q_mca;
d3d065c0 3121 if (brmctx->multicast_mld_version == 2 &&
23550b83
NA		 3122 !ipv6_addr_any(&mld2q->mld2q_mca) &&
3123 mld2q->mld2q_suppress)
3124 goto out;
e3f5b170
DB		 3125
3126 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 3127 }
3128
9ed973cc
LL		 3129 is_general_query = group && ipv6_addr_any(group);
3130
dc4eb53a
LL		 3131 if (is_general_query) {
3132 saddr.proto = htons(ETH_P_IPV6);
deb96566 3133 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
b00589af 3134
adc47037 3135 br_ip6_multicast_query_received(brmctx, pmctx,
d3d065c0 3136 &brmctx->ip6_other_query,
b19232ef 3137 &saddr, max_delay);
08b202b6 3138 goto out;
6c03ee8b
LL		 3139 } else if (!group) {
3140 goto out;
dc4eb53a 3141 }
08b202b6 3142
adc47037 3143 mp = br_mdb_ip6_get(brmctx->br, group, vid);
08b202b6
YH		 3144 if (!mp)
3145 goto out;
3146
d3d065c0 3147 max_delay *= brmctx->multicast_last_member_count;
ff0fd34e 3148 if (mp->host_joined &&
08b202b6
YH		 3149 (timer_pending(&mp->timer) ?
3150 time_after(mp->timer.expires, now + max_delay) :
3151 try_to_del_timer_sync(&mp->timer) >= 0))
3152 mod_timer(&mp->timer, now + max_delay);
3153
e8051688 3154 for (pp = &mp->ports;
adc47037 3155 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 3156 pp = &p->next) {
08b202b6
YH		 3157 if (timer_pending(&p->timer) ?
3158 time_after(p->timer.expires, now + max_delay) :
23550b83 3159 try_to_del_timer_sync(&p->timer) >= 0 &&
d3d065c0 3160 (brmctx->multicast_mld_version == 1 ||
23550b83 3161 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 3162 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 3163 }
3164
3165out:
adc47037 3166 spin_unlock(&brmctx->br->multicast_lock);
08b202b6
YH		 3167 return err;
3168}
3169#endif
3170
90010b36 3171static void
adc47037
NA		 3172br_multicast_leave_group(struct net_bridge_mcast *brmctx,
3173 struct net_bridge_mcast_port *pmctx,
90010b36
LL		 3174 struct br_ip *group,
3175 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 3176 struct bridge_mcast_own_query *own_query,
3177 const unsigned char *src)
eb1d1641 3178{
eb1d1641
HX		 3179 struct net_bridge_mdb_entry *mp;
3180 struct net_bridge_port_group *p;
3181 unsigned long now;
3182 unsigned long time;
3183
adc47037
NA		 3184 spin_lock(&brmctx->br->multicast_lock);
3185 if (!netif_running(brmctx->br->dev) ||
3186 (pmctx && pmctx->port->state == BR_STATE_DISABLED))
eb1d1641
HX		 3187 goto out;
3188
adc47037 3189 mp = br_mdb_ip_get(brmctx->br, group);
eb1d1641
HX		 3190 if (!mp)
3191 goto out;
3192
adc47037 3193 if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) {
544586f7
SA		 3194 struct net_bridge_port_group __rcu **pp;
3195
3196 for (pp = &mp->ports;
adc47037 3197 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
544586f7 3198 pp = &p->next) {
adc47037 3199 if (!br_port_group_equal(p, pmctx->port, src))
544586f7
SA		 3200 continue;
3201
5c725b6b
NA		 3202 if (p->flags & MDB_PG_FLAGS_PERMANENT)
3203 break;
3204
681590bd
NA		 3205 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
3206 br_multicast_del_pg(mp, p, pp);
544586f7
SA		 3207 }
3208 goto out;
3209 }
3210
3211 if (timer_pending(&other_query->timer))
3212 goto out;
3213
adc47037
NA		 3214 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) {
3215 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr,
42c11ccf 3216 false, 0, NULL);
6b7df111 3217
d3d065c0
NA		 3218 time = jiffies + brmctx->multicast_last_member_count *
3219 brmctx->multicast_last_member_interval;
cc0fdd80 3220
90010b36 3221 mod_timer(&own_query->timer, time);
6b7df111 3222
adc47037 3223 for (p = mlock_dereference(mp->ports, brmctx->br);
6b7df111 3224 p != NULL;
adc47037
NA		 3225 p = mlock_dereference(p->next, brmctx->br)) {
3226 if (!br_port_group_equal(p, pmctx->port, src))
6b7df111
CW		 3227 continue;
3228
3229 if (!hlist_unhashed(&p->mglist) &&
3230 (timer_pending(&p->timer) ?
3231 time_after(p->timer.expires, time) :
3232 try_to_del_timer_sync(&p->timer) >= 0)) {
3233 mod_timer(&p->timer, time);
3234 }
3235
3236 break;
3237 }
3238 }
3239
eb1d1641 3240 now = jiffies;
d3d065c0
NA		 3241 time = now + brmctx->multicast_last_member_count *
3242 brmctx->multicast_last_member_interval;
eb1d1641 3243
adc47037 3244 if (!pmctx) {
ff0fd34e 3245 if (mp->host_joined &&
eb1d1641
HX		 3246 (timer_pending(&mp->timer) ?
3247 time_after(mp->timer.expires, time) :
3248 try_to_del_timer_sync(&mp->timer) >= 0)) {
3249 mod_timer(&mp->timer, time);
eb1d1641 3250 }
454594f3
LL		 3251
3252 goto out;
3253 }
3254
adc47037 3255 for (p = mlock_dereference(mp->ports, brmctx->br);
454594f3 3256 p != NULL;
adc47037
NA		 3257 p = mlock_dereference(p->next, brmctx->br)) {
3258 if (p->key.port != pmctx->port)
454594f3
LL		 3259 continue;
3260
3261 if (!hlist_unhashed(&p->mglist) &&
3262 (timer_pending(&p->timer) ?
3263 time_after(p->timer.expires, time) :
3264 try_to_del_timer_sync(&p->timer) >= 0)) {
3265 mod_timer(&p->timer, time);
3266 }
3267
3268 break;
eb1d1641 3269 }
eb1d1641 3270out:
adc47037 3271 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 3272}
3273
adc47037
NA		 3274static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
3275 struct net_bridge_mcast_port *pmctx,
b0e9a30d 3276 __be32 group,
6db6f0ea
FF		 3277 __u16 vid,
3278 const unsigned char *src)
8ef2a9a5
YH		 3279{
3280 struct br_ip br_group;
90010b36 3281 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 3282
3283 if (ipv4_is_local_multicast(group))
3284 return;
3285
adc47037 3286 own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query;
90010b36 3287
1515a63f 3288 memset(&br_group, 0, sizeof(br_group));
eab3227b 3289 br_group.dst.ip4 = group;
8ef2a9a5 3290 br_group.proto = htons(ETH_P_IP);
b0e9a30d 3291 br_group.vid = vid;
8ef2a9a5 3292
adc47037
NA		 3293 br_multicast_leave_group(brmctx, pmctx, &br_group,
3294 &brmctx->ip4_other_query,
6db6f0ea 3295 own_query, src);
8ef2a9a5
YH		 3296}
3297
dfd56b8b 3298#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3299static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
3300 struct net_bridge_mcast_port *pmctx,
b0e9a30d 3301 const struct in6_addr *group,
6db6f0ea
FF		 3302 __u16 vid,
3303 const unsigned char *src)
08b202b6
YH		 3304{
3305 struct br_ip br_group;
90010b36 3306 struct bridge_mcast_own_query *own_query;
08b202b6 3307
3c3769e6 3308 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 3309 return;
3310
adc47037 3311 own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query;
90010b36 3312
1515a63f 3313 memset(&br_group, 0, sizeof(br_group));
eab3227b 3314 br_group.dst.ip6 = *group;
08b202b6 3315 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 3316 br_group.vid = vid;
08b202b6 3317
adc47037
NA		 3318 br_multicast_leave_group(brmctx, pmctx, &br_group,
3319 &brmctx->ip6_other_query,
6db6f0ea 3320 own_query, src);
08b202b6
YH		 3321}
3322#endif
8ef2a9a5 3323
1080ab95
NA		 3324static void br_multicast_err_count(const struct net_bridge *br,
3325 const struct net_bridge_port *p,
3326 __be16 proto)
3327{
3328 struct bridge_mcast_stats __percpu *stats;
3329 struct bridge_mcast_stats *pstats;
3330
675779ad 3331 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 3332 return;
3333
3334 if (p)
3335 stats = p->mcast_stats;
3336 else
3337 stats = br->mcast_stats;
3338 if (WARN_ON(!stats))
3339 return;
3340
3341 pstats = this_cpu_ptr(stats);
3342
3343 u64_stats_update_begin(&pstats->syncp);
3344 switch (proto) {
3345 case htons(ETH_P_IP):
3346 pstats->mstats.igmp_parse_errors++;
3347 break;
3348#if IS_ENABLED(CONFIG_IPV6)
3349 case htons(ETH_P_IPV6):
3350 pstats->mstats.mld_parse_errors++;
3351 break;
3352#endif
3353 }
3354 u64_stats_update_end(&pstats->syncp);
3355}
3356
adc47037
NA		 3357static void br_multicast_pim(struct net_bridge_mcast *brmctx,
3358 struct net_bridge_mcast_port *pmctx,
91b02d3d
NA		 3359 const struct sk_buff *skb)
3360{
3361 unsigned int offset = skb_transport_offset(skb);
3362 struct pimhdr *pimhdr, _pimhdr;
3363
3364 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
3365 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
3366 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
3367 return;
3368
adc47037
NA		 3369 spin_lock(&brmctx->br->multicast_lock);
3370 br_ip4_multicast_mark_router(brmctx, pmctx);
3371 spin_unlock(&brmctx->br->multicast_lock);
91b02d3d
NA		 3372}
3373
adc47037
NA		 3374static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3375 struct net_bridge_mcast_port *pmctx,
4b3087c7
LL		 3376 struct sk_buff *skb)
3377{
3378 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3379 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3380 return -ENOMSG;
3381
adc47037
NA		 3382 spin_lock(&brmctx->br->multicast_lock);
3383 br_ip4_multicast_mark_router(brmctx, pmctx);
3384 spin_unlock(&brmctx->br->multicast_lock);
4b3087c7
LL		 3385
3386 return 0;
3387}
3388
adc47037
NA		 3389static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
3390 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3391 struct sk_buff *skb,
3392 u16 vid)
eb1d1641 3393{
adc47037 3394 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
6db6f0ea 3395 const unsigned char *src;
eb1d1641 3396 struct igmphdr *ih;
eb1d1641
HX		 3397 int err;
3398
ba5ea614 3399 err = ip_mc_check_igmp(skb);
eb1d1641 3400
9afd85c9 3401 if (err == -ENOMSG) {
91b02d3d 3402 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 3403 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 3404 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3405 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
adc47037 3406 br_multicast_pim(brmctx, pmctx, skb);
4b3087c7 3407 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
adc47037 3408 br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb);
91b02d3d 3409 }
4b3087c7 3410
eb1d1641 3411 return 0;
9afd85c9 3412 } else if (err < 0) {
adc47037 3413 br_multicast_err_count(brmctx->br, p, skb->protocol);
9afd85c9 3414 return err;
bd4265fe 3415 }
eb1d1641 3416
9afd85c9 3417 ih = igmp_hdr(skb);
6db6f0ea 3418 src = eth_hdr(skb)->h_source;
1080ab95 3419 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
eb1d1641
HX		 3420
3421 switch (ih->type) {
3422 case IGMP_HOST_MEMBERSHIP_REPORT:
3423 case IGMPV2_HOST_MEMBERSHIP_REPORT:
62b2bcb4 3424 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
adc47037
NA		 3425 err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid,
3426 src, true);
eb1d1641
HX		 3427 break;
3428 case IGMPV3_HOST_MEMBERSHIP_REPORT:
adc47037 3429 err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid);
eb1d1641
HX		 3430 break;
3431 case IGMP_HOST_MEMBERSHIP_QUERY:
adc47037 3432 br_ip4_multicast_query(brmctx, pmctx, skb, vid);
eb1d1641
HX		 3433 break;
3434 case IGMP_HOST_LEAVE_MESSAGE:
adc47037 3435 br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src);
eb1d1641
HX		 3436 break;
3437 }
3438
adc47037 3439 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3440 BR_MCAST_DIR_RX);
3441
eb1d1641
HX		 3442 return err;
3443}
3444
dfd56b8b 3445#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3446static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3447 struct net_bridge_mcast_port *pmctx,
99014088 3448 struct sk_buff *skb)
4b3087c7 3449{
4b3087c7 3450 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
99014088 3451 return;
4b3087c7 3452
adc47037
NA		 3453 spin_lock(&brmctx->br->multicast_lock);
3454 br_ip6_multicast_mark_router(brmctx, pmctx);
3455 spin_unlock(&brmctx->br->multicast_lock);
4b3087c7
LL		 3456}
3457
adc47037
NA		 3458static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
3459 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3460 struct sk_buff *skb,
3461 u16 vid)
08b202b6 3462{
adc47037 3463 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
6db6f0ea 3464 const unsigned char *src;
9afd85c9 3465 struct mld_msg *mld;
08b202b6
YH		 3466 int err;
3467
ba5ea614 3468 err = ipv6_mc_check_mld(skb);
08b202b6 3469
99014088 3470 if (err == -ENOMSG || err == -ENODATA) {
9afd85c9
LL		 3471 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3472 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
99014088
LL		 3473 if (err == -ENODATA &&
3474 ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
adc47037 3475 br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
4b3087c7 3476
08b202b6 3477 return 0;
9afd85c9 3478 } else if (err < 0) {
adc47037 3479 br_multicast_err_count(brmctx->br, p, skb->protocol);
9afd85c9 3480 return err;
08b202b6
YH		 3481 }
3482
9afd85c9 3483 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 3484 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 3485
9afd85c9 3486 switch (mld->mld_type) {
08b202b6 3487 case ICMPV6_MGM_REPORT:
6db6f0ea 3488 src = eth_hdr(skb)->h_source;
fc2af6c7 3489 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
adc47037
NA		 3490 err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca,
3491 vid, src, true);
08b202b6 3492 break;
08b202b6 3493 case ICMPV6_MLD2_REPORT:
adc47037 3494 err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid);
08b202b6
YH		 3495 break;
3496 case ICMPV6_MGM_QUERY:
adc47037 3497 err = br_ip6_multicast_query(brmctx, pmctx, skb, vid);
08b202b6
YH		 3498 break;
3499 case ICMPV6_MGM_REDUCTION:
6db6f0ea 3500 src = eth_hdr(skb)->h_source;
adc47037
NA		 3501 br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid,
3502 src);
9afd85c9 3503 break;
08b202b6
YH		 3504 }
3505
adc47037 3506 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3507 BR_MCAST_DIR_RX);
3508
08b202b6
YH		 3509 return err;
3510}
3511#endif
3512
f4b7002a
NA		 3513int br_multicast_rcv(struct net_bridge_mcast **brmctx,
3514 struct net_bridge_mcast_port **pmctx,
3515 struct net_bridge_vlan *vlan,
06499098 3516 struct sk_buff *skb, u16 vid)
eb1d1641 3517{
1080ab95
NA		 3518 int ret = 0;
3519
1fafc7a9
YH		 3520 BR_INPUT_SKB_CB(skb)->igmp = 0;
3521 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3522
f4b7002a 3523 if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 3524 return 0;
3525
f4b7002a
NA		 3526 if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) {
3527 const struct net_bridge_vlan *masterv;
3528
3529 /* the vlan has the master flag set only when transmitting
3530 * through the bridge device
3531 */
3532 if (br_vlan_is_master(vlan)) {
3533 masterv = vlan;
3534 *brmctx = &vlan->br_mcast_ctx;
3535 *pmctx = NULL;
3536 } else {
3537 masterv = vlan->brvlan;
3538 *brmctx = &vlan->brvlan->br_mcast_ctx;
3539 *pmctx = &vlan->port_mcast_ctx;
3540 }
3541
3542 if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
3543 return 0;
3544 }
3545
eb1d1641
HX		 3546 switch (skb->protocol) {
3547 case htons(ETH_P_IP):
f4b7002a 3548 ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid);
1080ab95 3549 break;
dfd56b8b 3550#if IS_ENABLED(CONFIG_IPV6)
08b202b6 3551 case htons(ETH_P_IPV6):
f4b7002a 3552 ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid);
1080ab95 3553 break;
08b202b6 3554#endif
eb1d1641
HX		 3555 }
3556
1080ab95 3557 return ret;
eb1d1641
HX		 3558}
3559
adc47037 3560static void br_multicast_query_expired(struct net_bridge_mcast *brmctx,
2cd41431
LL		 3561 struct bridge_mcast_own_query *query,
3562 struct bridge_mcast_querier *querier)
cc0fdd80 3563{
adc47037
NA		 3564 spin_lock(&brmctx->br->multicast_lock);
3565 if (query->startup_sent < brmctx->multicast_startup_query_count)
cc0fdd80
LL		 3566 query->startup_sent++;
3567
71d9f614 3568 RCU_INIT_POINTER(querier->port, NULL);
adc47037
NA		 3569 br_multicast_send_query(brmctx, NULL, query);
3570 spin_unlock(&brmctx->br->multicast_lock);
cc0fdd80
LL		 3571}
3572
88c1f37f 3573static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 3574{
d3d065c0
NA		 3575 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
3576 ip4_own_query.timer);
eb1d1641 3577
adc47037 3578 br_multicast_query_expired(brmctx, &brmctx->ip4_own_query,
d3d065c0 3579 &brmctx->ip4_querier);
cc0fdd80 3580}
eb1d1641 3581
cc0fdd80 3582#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 3583static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 3584{
d3d065c0
NA		 3585 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
3586 ip6_own_query.timer);
eb1d1641 3587
adc47037 3588 br_multicast_query_expired(brmctx, &brmctx->ip6_own_query,
d3d065c0 3589 &brmctx->ip6_querier);
eb1d1641 3590}
cc0fdd80 3591#endif
eb1d1641 3592
e12cec65 3593static void br_multicast_gc_work(struct work_struct *work)
8b671779
NA		 3594{
3595 struct net_bridge *br = container_of(work, struct net_bridge,
e12cec65 3596 mcast_gc_work);
8b671779
NA		 3597 HLIST_HEAD(deleted_head);
3598
3599 spin_lock_bh(&br->multicast_lock);
e12cec65 3600 hlist_move_list(&br->mcast_gc_list, &deleted_head);
8b671779
NA		 3601 spin_unlock_bh(&br->multicast_lock);
3602
e12cec65 3603 br_multicast_gc(&deleted_head);
8b671779
NA		 3604}
3605
613d61db
NA		 3606void br_multicast_ctx_init(struct net_bridge *br,
3607 struct net_bridge_vlan *vlan,
3608 struct net_bridge_mcast *brmctx)
eb1d1641 3609{
613d61db
NA		 3610 brmctx->br = br;
3611 brmctx->vlan = vlan;
3612 brmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3613 brmctx->multicast_last_member_count = 2;
3614 brmctx->multicast_startup_query_count = 2;
eb1d1641 3615
613d61db
NA		 3616 brmctx->multicast_last_member_interval = HZ;
3617 brmctx->multicast_query_response_interval = 10 * HZ;
3618 brmctx->multicast_startup_query_interval = 125 * HZ / 4;
3619 brmctx->multicast_query_interval = 125 * HZ;
3620 brmctx->multicast_querier_interval = 255 * HZ;
3621 brmctx->multicast_membership_interval = 260 * HZ;
3622
3623 brmctx->ip4_other_query.delay_time = 0;
3624 brmctx->ip4_querier.port = NULL;
3625 brmctx->multicast_igmp_version = 2;
cc0fdd80 3626#if IS_ENABLED(CONFIG_IPV6)
613d61db
NA		 3627 brmctx->multicast_mld_version = 1;
3628 brmctx->ip6_other_query.delay_time = 0;
3629 brmctx->ip6_querier.port = NULL;
cc0fdd80 3630#endif
b00589af 3631
613d61db 3632 timer_setup(&brmctx->ip4_mc_router_timer,
ee5fb222 3633 br_ip4_multicast_local_router_expired, 0);
613d61db 3634 timer_setup(&brmctx->ip4_other_query.timer,
88c1f37f 3635 br_ip4_multicast_querier_expired, 0);
613d61db 3636 timer_setup(&brmctx->ip4_own_query.timer,
88c1f37f 3637 br_ip4_multicast_query_expired, 0);
cc0fdd80 3638#if IS_ENABLED(CONFIG_IPV6)
613d61db 3639 timer_setup(&brmctx->ip6_mc_router_timer,
a3c02e76 3640 br_ip6_multicast_local_router_expired, 0);
613d61db 3641 timer_setup(&brmctx->ip6_other_query.timer,
88c1f37f 3642 br_ip6_multicast_querier_expired, 0);
613d61db 3643 timer_setup(&brmctx->ip6_own_query.timer,
88c1f37f 3644 br_ip6_multicast_query_expired, 0);
cc0fdd80 3645#endif
613d61db
NA		 3646}
3647
3648void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
3649{
3650 __br_multicast_stop(brmctx);
3651}
3652
3653void br_multicast_init(struct net_bridge *br)
3654{
3655 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
3656
3657 br_multicast_ctx_init(br, NULL, &br->multicast_ctx);
3658
3659 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
3660 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
3661
3662 spin_lock_init(&br->multicast_lock);
19e3a9c9 3663 INIT_HLIST_HEAD(&br->mdb_list);
e12cec65
NA		 3664 INIT_HLIST_HEAD(&br->mcast_gc_list);
3665 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
eb1d1641
HX		 3666}
3667
4effd28c
LL		 3668static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
3669{
3670 struct in_device *in_dev = in_dev_get(br->dev);
3671
3672 if (!in_dev)
3673 return;
3674
9fb20801 3675 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 3676 in_dev_put(in_dev);
3677}
3678
3679#if IS_ENABLED(CONFIG_IPV6)
3680static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3681{
3682 struct in6_addr addr;
3683
3684 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3685 ipv6_dev_mc_inc(br->dev, &addr);
3686}
3687#else
3688static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3689{
3690}
3691#endif
3692
851d0a73 3693void br_multicast_join_snoopers(struct net_bridge *br)
4effd28c
LL		 3694{
3695 br_ip4_multicast_join_snoopers(br);
3696 br_ip6_multicast_join_snoopers(br);
3697}
3698
3699static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
3700{
3701 struct in_device *in_dev = in_dev_get(br->dev);
3702
3703 if (WARN_ON(!in_dev))
3704 return;
3705
9fb20801 3706 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 3707 in_dev_put(in_dev);
3708}
3709
3710#if IS_ENABLED(CONFIG_IPV6)
3711static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3712{
3713 struct in6_addr addr;
3714
3715 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3716 ipv6_dev_mc_dec(br->dev, &addr);
3717}
3718#else
3719static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3720{
3721}
3722#endif
3723
851d0a73 3724void br_multicast_leave_snoopers(struct net_bridge *br)
4effd28c
LL		 3725{
3726 br_ip4_multicast_leave_snoopers(br);
3727 br_ip6_multicast_leave_snoopers(br);
3728}
3729
7b54aaaf
NA		 3730static void __br_multicast_open_query(struct net_bridge *br,
3731 struct bridge_mcast_own_query *query)
eb1d1641 3732{
cc0fdd80 3733 query->startup_sent = 0;
eb1d1641 3734
13cefad2 3735 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 3736 return;
3737
cc0fdd80
LL		 3738 mod_timer(&query->timer, jiffies);
3739}
3740
7b54aaaf 3741static void __br_multicast_open(struct net_bridge_mcast *brmctx)
cc0fdd80 3742{
7b54aaaf 3743 __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query);
cc0fdd80 3744#if IS_ENABLED(CONFIG_IPV6)
7b54aaaf 3745 __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query);
cc0fdd80 3746#endif
eb1d1641
HX		 3747}
3748
7b54aaaf
NA		 3749void br_multicast_open(struct net_bridge *br)
3750{
7b54aaaf
NA		 3751 ASSERT_RTNL();
3752
f4b7002a
NA		 3753 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
3754 struct net_bridge_vlan_group *vg;
3755 struct net_bridge_vlan *vlan;
3756
3757 vg = br_vlan_group(br);
3758 if (vg) {
3759 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
3760 struct net_bridge_mcast *brmctx;
3761
3762 brmctx = &vlan->br_mcast_ctx;
3763 if (br_vlan_is_brentry(vlan) &&
3764 !br_multicast_ctx_vlan_disabled(brmctx))
3765 __br_multicast_open(&vlan->br_mcast_ctx);
3766 }
7b54aaaf
NA		 3767 }
3768 }
3769
3770 __br_multicast_open(&br->multicast_ctx);
3771}
3772
613d61db 3773static void __br_multicast_stop(struct net_bridge_mcast *brmctx)
eb1d1641 3774{
613d61db
NA		 3775 del_timer_sync(&brmctx->ip4_mc_router_timer);
3776 del_timer_sync(&brmctx->ip4_other_query.timer);
3777 del_timer_sync(&brmctx->ip4_own_query.timer);
cc0fdd80 3778#if IS_ENABLED(CONFIG_IPV6)
613d61db
NA		 3779 del_timer_sync(&brmctx->ip6_mc_router_timer);
3780 del_timer_sync(&brmctx->ip6_other_query.timer);
3781 del_timer_sync(&brmctx->ip6_own_query.timer);
cc0fdd80 3782#endif
e10177ab
SA		 3783}
3784
7b54aaaf
NA		 3785void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on)
3786{
3787 struct net_bridge *br;
3788
3789 /* it's okay to check for the flag without the multicast lock because it
3790 * can only change under RTNL -> multicast_lock, we need the latter to
3791 * sync with timers and packets
3792 */
3793 if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED))
3794 return;
3795
3796 if (br_vlan_is_master(vlan)) {
3797 br = vlan->br;
3798
3799 if (!br_vlan_is_brentry(vlan) ||
3800 (on &&
3801 br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx)))
3802 return;
3803
3804 spin_lock_bh(&br->multicast_lock);
3805 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
3806 spin_unlock_bh(&br->multicast_lock);
3807
3808 if (on)
3809 __br_multicast_open(&vlan->br_mcast_ctx);
3810 else
3811 __br_multicast_stop(&vlan->br_mcast_ctx);
3812 } else {
3813 struct net_bridge_mcast *brmctx;
3814
3815 brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx);
3816 if (on && br_multicast_ctx_vlan_global_disabled(brmctx))
3817 return;
3818
3819 br = vlan->port->br;
3820 spin_lock_bh(&br->multicast_lock);
3821 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
3822 if (on)
3823 __br_multicast_enable_port_ctx(&vlan->port_mcast_ctx);
3824 else
3825 __br_multicast_disable_port_ctx(&vlan->port_mcast_ctx);
3826 spin_unlock_bh(&br->multicast_lock);
3827 }
3828}
3829
f4b7002a
NA		 3830void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on)
3831{
3832 struct net_bridge_port *p;
3833
3834 if (WARN_ON_ONCE(!br_vlan_is_master(vlan)))
3835 return;
3836
3837 list_for_each_entry(p, &vlan->br->port_list, list) {
3838 struct net_bridge_vlan *vport;
3839
3840 vport = br_vlan_find(nbp_vlan_group(p), vlan->vid);
3841 if (!vport)
3842 continue;
3843 br_multicast_toggle_one_vlan(vport, on);
3844 }
3845}
3846
3847int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
3848 struct netlink_ext_ack *extack)
613d61db 3849{
7b54aaaf
NA		 3850 struct net_bridge_vlan_group *vg;
3851 struct net_bridge_vlan *vlan;
f4b7002a 3852 struct net_bridge_port *p;
7b54aaaf 3853
f4b7002a
NA		 3854 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on)
3855 return 0;
3856
3857 if (on && !br_opt_get(br, BROPT_VLAN_ENABLED)) {
3858 NL_SET_ERR_MSG_MOD(extack, "Cannot enable multicast vlan snooping with vlan filtering disabled");
3859 return -EINVAL;
3860 }
7b54aaaf
NA		 3861
3862 vg = br_vlan_group(br);
f4b7002a
NA		 3863 if (!vg)
3864 return 0;
3865
3866 br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on);
3867
3868 /* disable/enable non-vlan mcast contexts based on vlan snooping */
3869 if (on)
3870 __br_multicast_stop(&br->multicast_ctx);
3871 else
3872 __br_multicast_open(&br->multicast_ctx);
3873 list_for_each_entry(p, &br->port_list, list) {
3874 if (on)
3875 br_multicast_disable_port(p);
3876 else
3877 br_multicast_enable_port(p);
3878 }
3879
3880 list_for_each_entry(vlan, &vg->vlan_list, vlist)
3881 br_multicast_toggle_vlan(vlan, on);
3882
3883 return 0;
3884}
3885
3886void br_multicast_stop(struct net_bridge *br)
3887{
3888 ASSERT_RTNL();
3889
3890 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
3891 struct net_bridge_vlan_group *vg;
3892 struct net_bridge_vlan *vlan;
3893
3894 vg = br_vlan_group(br);
3895 if (vg) {
3896 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
3897 struct net_bridge_mcast *brmctx;
3898
3899 brmctx = &vlan->br_mcast_ctx;
3900 if (br_vlan_is_brentry(vlan) &&
3901 !br_multicast_ctx_vlan_disabled(brmctx))
3902 __br_multicast_stop(&vlan->br_mcast_ctx);
3903 }
7b54aaaf
NA		 3904 }
3905 }
3906
613d61db
NA		 3907 __br_multicast_stop(&br->multicast_ctx);
3908}
3909
e10177ab
SA		 3910void br_multicast_dev_del(struct net_bridge *br)
3911{
e10177ab 3912 struct net_bridge_mdb_entry *mp;
8b671779 3913 HLIST_HEAD(deleted_head);
19e3a9c9 3914 struct hlist_node *tmp;
eb1d1641
HX		 3915
3916 spin_lock_bh(&br->multicast_lock);
e12cec65
NA		 3917 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
3918 br_multicast_del_mdb_entry(mp);
3919 hlist_move_list(&br->mcast_gc_list, &deleted_head);
eb1d1641 3920 spin_unlock_bh(&br->multicast_lock);
19e3a9c9 3921
613d61db 3922 br_multicast_ctx_deinit(&br->multicast_ctx);
e12cec65
NA		 3923 br_multicast_gc(&deleted_head);
3924 cancel_work_sync(&br->mcast_gc_work);
8b671779 3925
4329596c 3926 rcu_barrier();
eb1d1641 3927}
0909e117
HX		 3928
3929int br_multicast_set_router(struct net_bridge *br, unsigned long val)
3930{
d3d065c0 3931 struct net_bridge_mcast *brmctx = &br->multicast_ctx;
6ae4ae8e 3932 int err = -EINVAL;
0909e117
HX		 3933
3934 spin_lock_bh(&br->multicast_lock);
0909e117
HX		 3935
3936 switch (val) {
7f0aec7a
NA		 3937 case MDB_RTR_TYPE_DISABLED:
3938 case MDB_RTR_TYPE_PERM:
77041420 3939 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
d3d065c0 3940 del_timer(&brmctx->ip4_mc_router_timer);
a3c02e76 3941#if IS_ENABLED(CONFIG_IPV6)
d3d065c0 3942 del_timer(&brmctx->ip6_mc_router_timer);
a3c02e76 3943#endif
d3d065c0 3944 brmctx->multicast_router = val;
77041420
YG		 3945 err = 0;
3946 break;
7f0aec7a 3947 case MDB_RTR_TYPE_TEMP_QUERY:
d3d065c0 3948 if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
77041420 3949 br_mc_router_state_change(br, false);
d3d065c0 3950 brmctx->multicast_router = val;
0909e117
HX		 3951 err = 0;
3952 break;
0909e117
HX		 3953 }
3954
0909e117
HX		 3955 spin_unlock_bh(&br->multicast_lock);
3956
3957 return err;
3958}
3959
ed2d3597 3960static void
adc47037 3961br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted)
7f0aec7a 3962{
ed2d3597 3963 if (!deleted)
7f0aec7a 3964 return;
ed2d3597 3965
a3c02e76
LL		 3966 /* For backwards compatibility for now, only notify if there is
3967 * no multicast router anymore for both IPv4 and IPv6.
3968 */
adc47037 3969 if (!hlist_unhashed(&pmctx->ip4_rlist))
a3c02e76
LL		 3970 return;
3971#if IS_ENABLED(CONFIG_IPV6)
adc47037 3972 if (!hlist_unhashed(&pmctx->ip6_rlist))
a3c02e76
LL		 3973 return;
3974#endif
3975
adc47037
NA		 3976 br_rtr_notify(pmctx->port->br->dev, pmctx->port, RTM_DELMDB);
3977 br_port_mc_router_state_change(pmctx->port, false);
f12e7d95
NF		 3978
3979 /* don't allow timer refresh */
adc47037
NA		 3980 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP)
3981 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 3982}
3983
0909e117
HX		 3984int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
3985{
d3d065c0 3986 struct net_bridge_mcast *brmctx = &p->br->multicast_ctx;
adc47037 3987 struct net_bridge_mcast_port *pmctx = &p->multicast_ctx;
a55d8246 3988 unsigned long now = jiffies;
6ae4ae8e 3989 int err = -EINVAL;
ed2d3597 3990 bool del = false;
0909e117 3991
d3d065c0 3992 spin_lock(&p->br->multicast_lock);
adc47037 3993 if (pmctx->multicast_router == val) {
a55d8246 3994 /* Refresh the temp router port timer */
adc47037
NA		 3995 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) {
3996 mod_timer(&pmctx->ip4_mc_router_timer,
d3d065c0 3997 now + brmctx->multicast_querier_interval);
a3c02e76 3998#if IS_ENABLED(CONFIG_IPV6)
adc47037 3999 mod_timer(&pmctx->ip6_mc_router_timer,
d3d065c0 4000 now + brmctx->multicast_querier_interval);
a3c02e76
LL		 4001#endif
4002 }
4950cfd1
NA		 4003 err = 0;
4004 goto unlock;
4005 }
0909e117 4006 switch (val) {
7f0aec7a 4007 case MDB_RTR_TYPE_DISABLED:
adc47037
NA		 4008 pmctx->multicast_router = MDB_RTR_TYPE_DISABLED;
4009 del |= br_ip4_multicast_rport_del(pmctx);
4010 del_timer(&pmctx->ip4_mc_router_timer);
4011 del |= br_ip6_multicast_rport_del(pmctx);
a3c02e76 4012#if IS_ENABLED(CONFIG_IPV6)
adc47037 4013 del_timer(&pmctx->ip6_mc_router_timer);
a3c02e76 4014#endif
adc47037 4015 br_multicast_rport_del_notify(pmctx, del);
7f0aec7a
NA		 4016 break;
4017 case MDB_RTR_TYPE_TEMP_QUERY:
adc47037
NA		 4018 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4019 del |= br_ip4_multicast_rport_del(pmctx);
4020 del |= br_ip6_multicast_rport_del(pmctx);
4021 br_multicast_rport_del_notify(pmctx, del);
7f0aec7a
NA		 4022 break;
4023 case MDB_RTR_TYPE_PERM:
adc47037
NA		 4024 pmctx->multicast_router = MDB_RTR_TYPE_PERM;
4025 del_timer(&pmctx->ip4_mc_router_timer);
4026 br_ip4_multicast_add_router(brmctx, pmctx);
a3c02e76 4027#if IS_ENABLED(CONFIG_IPV6)
adc47037 4028 del_timer(&pmctx->ip6_mc_router_timer);
a3c02e76 4029#endif
adc47037 4030 br_ip6_multicast_add_router(brmctx, pmctx);
0909e117 4031 break;
a55d8246 4032 case MDB_RTR_TYPE_TEMP:
adc47037
NA		 4033 pmctx->multicast_router = MDB_RTR_TYPE_TEMP;
4034 br_ip4_multicast_mark_router(brmctx, pmctx);
4035 br_ip6_multicast_mark_router(brmctx, pmctx);
a55d8246 4036 break;
7f0aec7a
NA		 4037 default:
4038 goto unlock;
0909e117 4039 }
7f0aec7a
NA		 4040 err = 0;
4041unlock:
d3d065c0 4042 spin_unlock(&p->br->multicast_lock);
0909e117
HX		 4043
4044 return err;
4045}
561f1103 4046
adc47037 4047static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
90010b36 4048 struct bridge_mcast_own_query *query)
561f1103
HX		 4049{
4050 struct net_bridge_port *port;
74857216 4051
7b54aaaf 4052 __br_multicast_open_query(brmctx->br, query);
74857216 4053
c5b493ce 4054 rcu_read_lock();
adc47037 4055 list_for_each_entry_rcu(port, &brmctx->br->port_list, list) {
74857216
HX		 4056 if (port->state == BR_STATE_DISABLED ||
4057 port->state == BR_STATE_BLOCKING)
4058 continue;
4059
adc47037 4060 if (query == &brmctx->ip4_own_query)
9632233e 4061 br_multicast_enable(&port->multicast_ctx.ip4_own_query);
cc0fdd80
LL		 4062#if IS_ENABLED(CONFIG_IPV6)
4063 else
9632233e 4064 br_multicast_enable(&port->multicast_ctx.ip6_own_query);
cc0fdd80 4065#endif
74857216 4066 }
c5b493ce 4067 rcu_read_unlock();
74857216
HX		 4068}
4069
ae1ea84b
FF		 4070int br_multicast_toggle(struct net_bridge *br, unsigned long val,
4071 struct netlink_ext_ack *extack)
74857216 4072{
7cb3f921 4073 struct net_bridge_port *port;
851d0a73 4074 bool change_snoopers = false;
ae1ea84b 4075 int err = 0;
561f1103 4076
ef5e0d82 4077 spin_lock_bh(&br->multicast_lock);
13cefad2 4078 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 4079 goto unlock;
4080
ae1ea84b
FF		 4081 err = br_mc_disabled_update(br->dev, val, extack);
4082 if (err == -EOPNOTSUPP)
4083 err = 0;
4084 if (err)
4085 goto unlock;
4086
13cefad2 4087 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4effd28c 4088 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
851d0a73 4089 change_snoopers = true;
561f1103 4090 goto unlock;
4effd28c 4091 }
561f1103 4092
3a7fda06
HX		 4093 if (!netif_running(br->dev))
4094 goto unlock;
4095
7cb3f921
NA		 4096 br_multicast_open(br);
4097 list_for_each_entry(port, &br->port_list, list)
adc47037 4098 __br_multicast_enable_port_ctx(&port->multicast_ctx);
561f1103 4099
851d0a73
JH		 4100 change_snoopers = true;
4101
561f1103 4102unlock:
ef5e0d82 4103 spin_unlock_bh(&br->multicast_lock);
561f1103 4104
851d0a73
JH		 4105 /* br_multicast_join_snoopers has the potential to cause
4106 * an MLD Report/Leave to be delivered to br_multicast_rcv,
4107 * which would in turn call br_multicast_add_group, which would
4108 * attempt to acquire multicast_lock. This function should be
4109 * called after the lock has been released to avoid deadlocks on
4110 * multicast_lock.
4111 *
4112 * br_multicast_leave_snoopers does not have the problem since
4113 * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
4114 * returns without calling br_multicast_ipv4/6_rcv if it's not
4115 * enabled. Moved both functions out just for symmetry.
4116 */
4117 if (change_snoopers) {
4118 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
4119 br_multicast_join_snoopers(br);
4120 else
4121 br_multicast_leave_snoopers(br);
4122 }
4123
ae1ea84b 4124 return err;
561f1103 4125}
b195167f 4126
9341b988
IS		 4127bool br_multicast_enabled(const struct net_device *dev)
4128{
4129 struct net_bridge *br = netdev_priv(dev);
4130
13cefad2 4131 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 4132}
4133EXPORT_SYMBOL_GPL(br_multicast_enabled);
4134
0912bda4
YG		 4135bool br_multicast_router(const struct net_device *dev)
4136{
4137 struct net_bridge *br = netdev_priv(dev);
4138 bool is_router;
4139
4140 spin_lock_bh(&br->multicast_lock);
adc47037 4141 is_router = br_multicast_is_router(&br->multicast_ctx, NULL);
0912bda4
YG		 4142 spin_unlock_bh(&br->multicast_lock);
4143 return is_router;
4144}
4145EXPORT_SYMBOL_GPL(br_multicast_router);
4146
c5c23260
HX		 4147int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
4148{
d3d065c0 4149 struct net_bridge_mcast *brmctx = &br->multicast_ctx;
b00589af
LL		 4150 unsigned long max_delay;
4151
c5c23260
HX		 4152 val = !!val;
4153
4154 spin_lock_bh(&br->multicast_lock);
675779ad 4155 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
c5c23260
HX		 4156 goto unlock;
4157
675779ad 4158 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
b00589af
LL		 4159 if (!val)
4160 goto unlock;
4161
d3d065c0 4162 max_delay = brmctx->multicast_query_response_interval;
b00589af 4163
d3d065c0
NA		 4164 if (!timer_pending(&brmctx->ip4_other_query.timer))
4165 brmctx->ip4_other_query.delay_time = jiffies + max_delay;
cc0fdd80 4166
adc47037 4167 br_multicast_start_querier(brmctx, &brmctx->ip4_own_query);
cc0fdd80
LL		 4168
4169#if IS_ENABLED(CONFIG_IPV6)
d3d065c0
NA		 4170 if (!timer_pending(&brmctx->ip6_other_query.timer))
4171 brmctx->ip6_other_query.delay_time = jiffies + max_delay;
cc0fdd80 4172
adc47037 4173 br_multicast_start_querier(brmctx, &brmctx->ip6_own_query);
cc0fdd80 4174#endif
c5c23260
HX		 4175
4176unlock:
4177 spin_unlock_bh(&br->multicast_lock);
4178
4179 return 0;
4180}
4181
5e923585
NA		 4182int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
4183{
4184 /* Currently we support only version 2 and 3 */
4185 switch (val) {
4186 case 2:
4187 case 3:
4188 break;
4189 default:
4190 return -EINVAL;
4191 }
4192
4193 spin_lock_bh(&br->multicast_lock);
d3d065c0 4194 br->multicast_ctx.multicast_igmp_version = val;
5e923585
NA		 4195 spin_unlock_bh(&br->multicast_lock);
4196
4197 return 0;
4198}
4199
aa2ae3e7
NA		 4200#if IS_ENABLED(CONFIG_IPV6)
4201int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
4202{
4203 /* Currently we support version 1 and 2 */
4204 switch (val) {
4205 case 1:
4206 case 2:
4207 break;
4208 default:
4209 return -EINVAL;
4210 }
4211
4212 spin_lock_bh(&br->multicast_lock);
d3d065c0 4213 br->multicast_ctx.multicast_mld_version = val;
aa2ae3e7
NA		 4214 spin_unlock_bh(&br->multicast_lock);
4215
4216 return 0;
4217}
4218#endif
4219
07f8ac4a
LL		 4220/**
4221 * br_multicast_list_adjacent - Returns snooped multicast addresses
4222 * @dev: The bridge port adjacent to which to retrieve addresses
4223 * @br_ip_list: The list to store found, snooped multicast IP addresses in
4224 *
4225 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
4226 * snooping feature on all bridge ports of dev's bridge device, excluding
4227 * the addresses from dev itself.
4228 *
4229 * Returns the number of items added to br_ip_list.
4230 *
4231 * Notes:
4232 * - br_ip_list needs to be initialized by caller
4233 * - br_ip_list might contain duplicates in the end
4234 * (needs to be taken care of by caller)
4235 * - br_ip_list needs to be freed by caller
4236 */
4237int br_multicast_list_adjacent(struct net_device *dev,
4238 struct list_head *br_ip_list)
4239{
4240 struct net_bridge *br;
4241 struct net_bridge_port *port;
4242 struct net_bridge_port_group *group;
4243 struct br_ip_list *entry;
4244 int count = 0;
4245
4246 rcu_read_lock();
35f861e3 4247 if (!br_ip_list || !netif_is_bridge_port(dev))
07f8ac4a
LL		 4248 goto unlock;
4249
4250 port = br_port_get_rcu(dev);
4251 if (!port || !port->br)
4252 goto unlock;
4253
4254 br = port->br;
4255
4256 list_for_each_entry_rcu(port, &br->port_list, list) {
4257 if (!port->dev || port->dev == dev)
4258 continue;
4259
4260 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
4261 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
4262 if (!entry)
4263 goto unlock;
4264
085b53c8 4265 entry->addr = group->key.addr;
07f8ac4a
LL		 4266 list_add(&entry->list, br_ip_list);
4267 count++;
4268 }
4269 }
4270
4271unlock:
4272 rcu_read_unlock();
4273 return count;
4274}
4275EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2cd41431 4276
c34963e2
LL		 4277/**
4278 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
4279 * @dev: The bridge port providing the bridge on which to check for a querier
4280 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4281 *
4282 * Checks whether the given interface has a bridge on top and if so returns
4283 * true if a valid querier exists anywhere on the bridged link layer.
4284 * Otherwise returns false.
4285 */
4286bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
4287{
4288 struct net_bridge *br;
4289 struct net_bridge_port *port;
4290 struct ethhdr eth;
4291 bool ret = false;
4292
4293 rcu_read_lock();
35f861e3 4294 if (!netif_is_bridge_port(dev))
c34963e2
LL		 4295 goto unlock;
4296
4297 port = br_port_get_rcu(dev);
4298 if (!port || !port->br)
4299 goto unlock;
4300
4301 br = port->br;
4302
4303 memset(&eth, 0, sizeof(eth));
4304 eth.h_proto = htons(proto);
4305
adc47037 4306 ret = br_multicast_querier_exists(&br->multicast_ctx, &eth, NULL);
c34963e2
LL		 4307
4308unlock:
4309 rcu_read_unlock();
4310 return ret;
4311}
4312EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
4313
2cd41431
LL		 4314/**
4315 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
4316 * @dev: The bridge port adjacent to which to check for a querier
4317 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4318 *
4319 * Checks whether the given interface has a bridge on top and if so returns
4320 * true if a selected querier is behind one of the other ports of this
4321 * bridge. Otherwise returns false.
4322 */
4323bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
4324{
d3d065c0 4325 struct net_bridge_mcast *brmctx;
2cd41431
LL		 4326 struct net_bridge *br;
4327 struct net_bridge_port *port;
4328 bool ret = false;
4329
4330 rcu_read_lock();
35f861e3 4331 if (!netif_is_bridge_port(dev))
2cd41431
LL		 4332 goto unlock;
4333
4334 port = br_port_get_rcu(dev);
4335 if (!port || !port->br)
4336 goto unlock;
4337
4338 br = port->br;
d3d065c0 4339 brmctx = &br->multicast_ctx;
2cd41431
LL		 4340
4341 switch (proto) {
4342 case ETH_P_IP:
d3d065c0
NA		 4343 if (!timer_pending(&brmctx->ip4_other_query.timer) ||
4344 rcu_dereference(brmctx->ip4_querier.port) == port)
2cd41431
LL		 4345 goto unlock;
4346 break;
3993c4e1 4347#if IS_ENABLED(CONFIG_IPV6)
2cd41431 4348 case ETH_P_IPV6:
d3d065c0
NA		 4349 if (!timer_pending(&brmctx->ip6_other_query.timer) ||
4350 rcu_dereference(brmctx->ip6_querier.port) == port)
2cd41431
LL		 4351 goto unlock;
4352 break;
3993c4e1 4353#endif
2cd41431
LL		 4354 default:
4355 goto unlock;
4356 }
4357
4358 ret = true;
4359unlock:
4360 rcu_read_unlock();
4361 return ret;
4362}
4363EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
1080ab95 4364
3b85f9ba
LL		 4365/**
4366 * br_multicast_has_router_adjacent - Checks for a router behind a bridge port
4367 * @dev: The bridge port adjacent to which to check for a multicast router
4368 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4369 *
4370 * Checks whether the given interface has a bridge on top and if so returns
4371 * true if a multicast router is behind one of the other ports of this
4372 * bridge. Otherwise returns false.
4373 */
4374bool br_multicast_has_router_adjacent(struct net_device *dev, int proto)
4375{
9632233e 4376 struct net_bridge_mcast_port *pmctx;
d3d065c0 4377 struct net_bridge_mcast *brmctx;
9632233e 4378 struct net_bridge_port *port;
3b85f9ba
LL		 4379 bool ret = false;
4380
4381 rcu_read_lock();
4382 port = br_port_get_check_rcu(dev);
4383 if (!port)
4384 goto unlock;
4385
d3d065c0 4386 brmctx = &port->br->multicast_ctx;
3b85f9ba
LL		 4387 switch (proto) {
4388 case ETH_P_IP:
d3d065c0 4389 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
3b85f9ba 4390 ip4_rlist) {
9632233e 4391 if (pmctx->port == port)
3b85f9ba
LL		 4392 continue;
4393
4394 ret = true;
4395 goto unlock;
4396 }
4397 break;
4398#if IS_ENABLED(CONFIG_IPV6)
4399 case ETH_P_IPV6:
d3d065c0 4400 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
3b85f9ba 4401 ip6_rlist) {
9632233e 4402 if (pmctx->port == port)
3b85f9ba
LL		 4403 continue;
4404
4405 ret = true;
4406 goto unlock;
4407 }
4408 break;
4409#endif
4410 default:
4411 /* when compiled without IPv6 support, be conservative and
4412 * always assume presence of an IPv6 multicast router
4413 */
4414 ret = true;
4415 }
4416
4417unlock:
4418 rcu_read_unlock();
4419 return ret;
4420}
4421EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);
4422
1080ab95 4423static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 4424 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 4425{
4426 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 4427 __be16 proto = skb->protocol;
4428 unsigned int t_len;
1080ab95
NA		 4429
4430 u64_stats_update_begin(&pstats->syncp);
4431 switch (proto) {
4432 case htons(ETH_P_IP):
a65056ec 4433 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 4434 switch (type) {
4435 case IGMP_HOST_MEMBERSHIP_REPORT:
4436 pstats->mstats.igmp_v1reports[dir]++;
4437 break;
4438 case IGMPV2_HOST_MEMBERSHIP_REPORT:
4439 pstats->mstats.igmp_v2reports[dir]++;
4440 break;
4441 case IGMPV3_HOST_MEMBERSHIP_REPORT:
4442 pstats->mstats.igmp_v3reports[dir]++;
4443 break;
4444 case IGMP_HOST_MEMBERSHIP_QUERY:
a65056ec
NA		 4445 if (t_len != sizeof(struct igmphdr)) {
4446 pstats->mstats.igmp_v3queries[dir]++;
4447 } else {
4448 unsigned int offset = skb_transport_offset(skb);
4449 struct igmphdr *ih, _ihdr;
4450
4451 ih = skb_header_pointer(skb, offset,
4452 sizeof(_ihdr), &_ihdr);
4453 if (!ih)
4454 break;
4455 if (!ih->code)
4456 pstats->mstats.igmp_v1queries[dir]++;
4457 else
4458 pstats->mstats.igmp_v2queries[dir]++;
4459 }
1080ab95
NA		 4460 break;
4461 case IGMP_HOST_LEAVE_MESSAGE:
4462 pstats->mstats.igmp_leaves[dir]++;
4463 break;
4464 }
4465 break;
4466#if IS_ENABLED(CONFIG_IPV6)
4467 case htons(ETH_P_IPV6):
a65056ec
NA		 4468 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
4469 sizeof(struct ipv6hdr);
4470 t_len -= skb_network_header_len(skb);
1080ab95
NA		 4471 switch (type) {
4472 case ICMPV6_MGM_REPORT:
4473 pstats->mstats.mld_v1reports[dir]++;
4474 break;
4475 case ICMPV6_MLD2_REPORT:
4476 pstats->mstats.mld_v2reports[dir]++;
4477 break;
4478 case ICMPV6_MGM_QUERY:
a65056ec
NA		 4479 if (t_len != sizeof(struct mld_msg))
4480 pstats->mstats.mld_v2queries[dir]++;
4481 else
4482 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 4483 break;
4484 case ICMPV6_MGM_REDUCTION:
4485 pstats->mstats.mld_leaves[dir]++;
4486 break;
4487 }
4488 break;
4489#endif /* CONFIG_IPV6 */
4490 }
4491 u64_stats_update_end(&pstats->syncp);
4492}
4493
adc47037
NA		 4494void br_multicast_count(struct net_bridge *br,
4495 const struct net_bridge_port *p,
a65056ec 4496 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 4497{
4498 struct bridge_mcast_stats __percpu *stats;
4499
4500 /* if multicast_disabled is true then igmp type can't be set */
675779ad 4501 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 4502 return;
4503
4504 if (p)
4505 stats = p->mcast_stats;
4506 else
4507 stats = br->mcast_stats;
4508 if (WARN_ON(!stats))
4509 return;
4510
a65056ec 4511 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 4512}
4513
4514int br_multicast_init_stats(struct net_bridge *br)
4515{
4516 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
4517 if (!br->mcast_stats)
4518 return -ENOMEM;
4519
4520 return 0;
4521}
4522
b6fe0440
IS		 4523void br_multicast_uninit_stats(struct net_bridge *br)
4524{
4525 free_percpu(br->mcast_stats);
4526}
4527
b3b6a84c
AB		 4528/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
4529static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
1080ab95
NA		 4530{
4531 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
4532 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
4533}
4534
4535void br_multicast_get_stats(const struct net_bridge *br,
4536 const struct net_bridge_port *p,
4537 struct br_mcast_stats *dest)
4538{
4539 struct bridge_mcast_stats __percpu *stats;
4540 struct br_mcast_stats tdst;
4541 int i;
4542
4543 memset(dest, 0, sizeof(*dest));
4544 if (p)
4545 stats = p->mcast_stats;
4546 else
4547 stats = br->mcast_stats;
4548 if (WARN_ON(!stats))
4549 return;
4550
4551 memset(&tdst, 0, sizeof(tdst));
4552 for_each_possible_cpu(i) {
4553 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
4554 struct br_mcast_stats temp;
4555 unsigned int start;
4556
4557 do {
4558 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
4559 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
4560 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
4561
a65056ec
NA		 4562 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
4563 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
4564 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
1080ab95
NA		 4565 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
4566 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
4567 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
4568 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
4569 tdst.igmp_parse_errors += temp.igmp_parse_errors;
4570
a65056ec
NA		 4571 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
4572 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 4573 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
4574 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
4575 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
4576 tdst.mld_parse_errors += temp.mld_parse_errors;
4577 }
4578 memcpy(dest, &tdst, sizeof(*dest));
4579}
19e3a9c9
NA		 4580
4581int br_mdb_hash_init(struct net_bridge *br)
4582{
085b53c8
NA		 4583 int err;
4584
4585 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
4586 if (err)
4587 return err;
4588
4589 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
4590 if (err) {
4591 rhashtable_destroy(&br->sg_port_tbl);
4592 return err;
4593 }
4594
4595 return 0;
19e3a9c9
NA		 4596}
4597
4598void br_mdb_hash_fini(struct net_bridge *br)
4599{
085b53c8 4600 rhashtable_destroy(&br->sg_port_tbl);
19e3a9c9
NA		 4601 rhashtable_destroy(&br->mdb_hash_tbl);
4602}
Linux 6.x block layer and io_uring tree(s)