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Merge branch 'sfc-ef100-tso-enhancements'
[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"
36
19e3a9c9
NA		 37static const struct rhashtable_params br_mdb_rht_params = {
38 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
39 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
40 .key_len = sizeof(struct br_ip),
41 .automatic_shrinking = true,
19e3a9c9
NA		 42};
43
085b53c8
NA		 44static const struct rhashtable_params br_sg_port_rht_params = {
45 .head_offset = offsetof(struct net_bridge_port_group, rhnode),
46 .key_offset = offsetof(struct net_bridge_port_group, key),
47 .key_len = sizeof(struct net_bridge_port_group_sg_key),
48 .automatic_shrinking = true,
49};
50
cc0fdd80 51static void br_multicast_start_querier(struct net_bridge *br,
90010b36 52 struct bridge_mcast_own_query *query);
754bc547
SA		 53static void br_multicast_add_router(struct net_bridge *br,
54 struct net_bridge_port *port);
bc8c20ac
SA		 55static void br_ip4_multicast_leave_group(struct net_bridge *br,
56 struct net_bridge_port *port,
57 __be32 group,
6db6f0ea
FF		 58 __u16 vid,
59 const unsigned char *src);
42c11ccf 60static void br_multicast_port_group_rexmit(struct timer_list *t);
6db6f0ea 61
f12e7d95 62static void __del_port_router(struct net_bridge_port *p);
bc8c20ac
SA		 63#if IS_ENABLED(CONFIG_IPV6)
64static void br_ip6_multicast_leave_group(struct net_bridge *br,
65 struct net_bridge_port *port,
66 const struct in6_addr *group,
6db6f0ea 67 __u16 vid, const unsigned char *src);
bc8c20ac 68#endif
b0812368
NA		 69static struct net_bridge_port_group *
70__br_multicast_add_group(struct net_bridge *br,
71 struct net_bridge_port *port,
72 struct br_ip *group,
73 const unsigned char *src,
74 u8 filter_mode,
9116ffbf
NA		 75 bool igmpv2_mldv1,
76 bool blocked);
8266a049
NA		 77static void br_multicast_find_del_pg(struct net_bridge *br,
78 struct net_bridge_port_group *pg);
c83b8fab 79
085b53c8
NA		 80static struct net_bridge_port_group *
81br_sg_port_find(struct net_bridge *br,
82 struct net_bridge_port_group_sg_key *sg_p)
83{
84 lockdep_assert_held_once(&br->multicast_lock);
85
86 return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
87 br_sg_port_rht_params);
88}
89
19e3a9c9
NA		 90static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
91 struct br_ip *dst)
08b202b6 92{
19e3a9c9 93 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 94}
08b202b6 95
19e3a9c9
NA		 96struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
97 struct br_ip *dst)
eb1d1641 98{
19e3a9c9 99 struct net_bridge_mdb_entry *ent;
eb1d1641 100
19e3a9c9 101 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 102
19e3a9c9
NA		 103 rcu_read_lock();
104 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
105 rcu_read_unlock();
7f285fa7 106
19e3a9c9 107 return ent;
7f285fa7
HX		 108}
109
19e3a9c9
NA		 110static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
111 __be32 dst, __u16 vid)
eb1d1641 112{
8ef2a9a5
YH		 113 struct br_ip br_dst;
114
19e3a9c9 115 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 116 br_dst.dst.ip4 = dst;
8ef2a9a5 117 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 118 br_dst.vid = vid;
0821ec55 119
19e3a9c9 120 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 121}
122
dfd56b8b 123#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 124static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
125 const struct in6_addr *dst,
126 __u16 vid)
08b202b6
YH		 127{
128 struct br_ip br_dst;
0821ec55 129
19e3a9c9 130 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 131 br_dst.dst.ip6 = *dst;
08b202b6 132 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 133 br_dst.vid = vid;
08b202b6 134
19e3a9c9 135 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 136}
137#endif
138
eb1d1641 139struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 140 struct sk_buff *skb, u16 vid)
eb1d1641 141{
8ef2a9a5
YH		 142 struct br_ip ip;
143
13cefad2 144 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 145 return NULL;
146
8ef2a9a5 147 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 148 return NULL;
149
19e3a9c9 150 memset(&ip, 0, sizeof(ip));
8ef2a9a5 151 ip.proto = skb->protocol;
fbca58a2 152 ip.vid = vid;
8ef2a9a5 153
eb1d1641
HX		 154 switch (skb->protocol) {
155 case htons(ETH_P_IP):
eab3227b 156 ip.dst.ip4 = ip_hdr(skb)->daddr;
7d07a68c
NA		 157 if (br->multicast_igmp_version == 3) {
158 struct net_bridge_mdb_entry *mdb;
159
160 ip.src.ip4 = ip_hdr(skb)->saddr;
161 mdb = br_mdb_ip_get_rcu(br, &ip);
162 if (mdb)
163 return mdb;
164 ip.src.ip4 = 0;
165 }
8ef2a9a5 166 break;
dfd56b8b 167#if IS_ENABLED(CONFIG_IPV6)
08b202b6 168 case htons(ETH_P_IPV6):
eab3227b 169 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
7d07a68c
NA		 170 if (br->multicast_mld_version == 2) {
171 struct net_bridge_mdb_entry *mdb;
172
173 ip.src.ip6 = ipv6_hdr(skb)->saddr;
174 mdb = br_mdb_ip_get_rcu(br, &ip);
175 if (mdb)
176 return mdb;
177 memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
178 }
08b202b6
YH		 179 break;
180#endif
8ef2a9a5
YH		 181 default:
182 return NULL;
eb1d1641
HX		 183 }
184
19e3a9c9 185 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 186}
187
b0812368
NA		 188static bool br_port_group_equal(struct net_bridge_port_group *p,
189 struct net_bridge_port *port,
190 const unsigned char *src)
191{
192 if (p->key.port != port)
193 return false;
194
195 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
196 return true;
197
198 return ether_addr_equal(src, p->eth_addr);
199}
200
8266a049
NA		 201static void __fwd_add_star_excl(struct net_bridge_port_group *pg,
202 struct br_ip *sg_ip)
203{
204 struct net_bridge_port_group_sg_key sg_key;
205 struct net_bridge *br = pg->key.port->br;
206 struct net_bridge_port_group *src_pg;
207
208 memset(&sg_key, 0, sizeof(sg_key));
209 sg_key.port = pg->key.port;
210 sg_key.addr = *sg_ip;
211 if (br_sg_port_find(br, &sg_key))
212 return;
213
214 src_pg = __br_multicast_add_group(br, pg->key.port, sg_ip, pg->eth_addr,
9116ffbf 215 MCAST_INCLUDE, false, false);
8266a049
NA		 216 if (IS_ERR_OR_NULL(src_pg) ||
217 src_pg->rt_protocol != RTPROT_KERNEL)
218 return;
219
220 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
221}
222
223static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
224 struct br_ip *sg_ip)
225{
226 struct net_bridge_port_group_sg_key sg_key;
227 struct net_bridge *br = pg->key.port->br;
228 struct net_bridge_port_group *src_pg;
229
230 memset(&sg_key, 0, sizeof(sg_key));
231 sg_key.port = pg->key.port;
232 sg_key.addr = *sg_ip;
233 src_pg = br_sg_port_find(br, &sg_key);
234 if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
235 src_pg->rt_protocol != RTPROT_KERNEL)
236 return;
237
238 br_multicast_find_del_pg(br, src_pg);
239}
240
241/* When a port group transitions to (or is added as) EXCLUDE we need to add it
242 * to all other ports' S,G entries which are not blocked by the current group
243 * for proper replication, the assumption is that any S,G blocked entries
244 * are already added so the S,G,port lookup should skip them.
245 * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
246 * deleted we need to remove it from all ports' S,G entries where it was
247 * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
248 */
249void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
250 u8 filter_mode)
251{
252 struct net_bridge *br = pg->key.port->br;
253 struct net_bridge_port_group *pg_lst;
254 struct net_bridge_mdb_entry *mp;
255 struct br_ip sg_ip;
256
257 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
258 return;
259
260 mp = br_mdb_ip_get(br, &pg->key.addr);
261 if (!mp)
262 return;
263
264 memset(&sg_ip, 0, sizeof(sg_ip));
265 sg_ip = pg->key.addr;
266 for (pg_lst = mlock_dereference(mp->ports, br);
267 pg_lst;
268 pg_lst = mlock_dereference(pg_lst->next, br)) {
269 struct net_bridge_group_src *src_ent;
270
271 if (pg_lst == pg)
272 continue;
273 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
274 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
275 continue;
276 sg_ip.src = src_ent->addr.src;
277 switch (filter_mode) {
278 case MCAST_INCLUDE:
279 __fwd_del_star_excl(pg, &sg_ip);
280 break;
281 case MCAST_EXCLUDE:
282 __fwd_add_star_excl(pg, &sg_ip);
283 break;
284 }
285 }
286 }
287}
288
094b82fd
NA		 289/* called when adding a new S,G with host_joined == false by default */
290static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
291 struct net_bridge_port_group *sg)
292{
293 struct net_bridge_mdb_entry *sg_mp;
294
295 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
296 return;
297 if (!star_mp->host_joined)
298 return;
299
300 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
301 if (!sg_mp)
302 return;
303 sg_mp->host_joined = true;
304}
305
306/* set the host_joined state of all of *,G's S,G entries */
307static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
308{
309 struct net_bridge *br = star_mp->br;
310 struct net_bridge_mdb_entry *sg_mp;
311 struct net_bridge_port_group *pg;
312 struct br_ip sg_ip;
313
314 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
315 return;
316
317 memset(&sg_ip, 0, sizeof(sg_ip));
318 sg_ip = star_mp->addr;
319 for (pg = mlock_dereference(star_mp->ports, br);
320 pg;
321 pg = mlock_dereference(pg->next, br)) {
322 struct net_bridge_group_src *src_ent;
323
324 hlist_for_each_entry(src_ent, &pg->src_list, node) {
325 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
326 continue;
327 sg_ip.src = src_ent->addr.src;
328 sg_mp = br_mdb_ip_get(br, &sg_ip);
329 if (!sg_mp)
330 continue;
331 sg_mp->host_joined = star_mp->host_joined;
332 }
333 }
334}
335
8266a049
NA		 336static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
337{
338 struct net_bridge_port_group __rcu **pp;
339 struct net_bridge_port_group *p;
340
341 /* *,G exclude ports are only added to S,G entries */
342 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
343 return;
344
345 /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
346 * we should ignore perm entries since they're managed by user-space
347 */
348 for (pp = &sgmp->ports;
349 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
350 pp = &p->next)
351 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
352 MDB_PG_FLAGS_PERMANENT)))
353 return;
354
094b82fd
NA		 355 /* currently the host can only have joined the *,G which means
356 * we treat it as EXCLUDE {}, so for an S,G it's considered a
357 * STAR_EXCLUDE entry and we can safely leave it
358 */
359 sgmp->host_joined = false;
360
8266a049
NA		 361 for (pp = &sgmp->ports;
362 (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
363 if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
364 br_multicast_del_pg(sgmp, p, pp);
365 else
366 pp = &p->next;
367 }
368}
369
370void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
371 struct net_bridge_port_group *sg)
372{
373 struct net_bridge_port_group_sg_key sg_key;
374 struct net_bridge *br = star_mp->br;
375 struct net_bridge_port_group *pg;
376
377 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
378 return;
379 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
380 return;
381
094b82fd 382 br_multicast_sg_host_state(star_mp, sg);
8266a049
NA		 383 memset(&sg_key, 0, sizeof(sg_key));
384 sg_key.addr = sg->key.addr;
385 /* we need to add all exclude ports to the S,G */
386 for (pg = mlock_dereference(star_mp->ports, br);
387 pg;
388 pg = mlock_dereference(pg->next, br)) {
389 struct net_bridge_port_group *src_pg;
390
391 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
392 continue;
393
394 sg_key.port = pg->key.port;
395 if (br_sg_port_find(br, &sg_key))
396 continue;
397
398 src_pg = __br_multicast_add_group(br, pg->key.port,
399 &sg->key.addr,
400 sg->eth_addr,
9116ffbf 401 MCAST_INCLUDE, false, false);
8266a049
NA		 402 if (IS_ERR_OR_NULL(src_pg) ||
403 src_pg->rt_protocol != RTPROT_KERNEL)
404 continue;
405 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
406 }
407}
408
b0812368
NA		 409static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
410{
8266a049 411 struct net_bridge_mdb_entry *star_mp;
b0812368
NA		 412 struct net_bridge_port_group *sg;
413 struct br_ip sg_ip;
414
415 if (src->flags & BR_SGRP_F_INSTALLED)
416 return;
417
418 memset(&sg_ip, 0, sizeof(sg_ip));
419 sg_ip = src->pg->key.addr;
420 sg_ip.src = src->addr.src;
421 sg = __br_multicast_add_group(src->br, src->pg->key.port, &sg_ip,
9116ffbf
NA		 422 src->pg->eth_addr, MCAST_INCLUDE, false,
423 !timer_pending(&src->timer));
b0812368
NA		 424 if (IS_ERR_OR_NULL(sg))
425 return;
426 src->flags |= BR_SGRP_F_INSTALLED;
8266a049 427 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
b0812368
NA		 428
429 /* if it was added by user-space as perm we can skip next steps */
430 if (sg->rt_protocol != RTPROT_KERNEL &&
431 (sg->flags & MDB_PG_FLAGS_PERMANENT))
432 return;
433
434 /* the kernel is now responsible for removing this S,G */
435 del_timer(&sg->timer);
8266a049
NA		 436 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
437 if (!star_mp)
438 return;
439
440 br_multicast_sg_add_exclude_ports(star_mp, sg);
b0812368
NA		 441}
442
443static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src)
444{
445 struct net_bridge_port_group *p, *pg = src->pg;
446 struct net_bridge_port_group __rcu **pp;
447 struct net_bridge_mdb_entry *mp;
448 struct br_ip sg_ip;
449
450 memset(&sg_ip, 0, sizeof(sg_ip));
451 sg_ip = pg->key.addr;
452 sg_ip.src = src->addr.src;
453
454 mp = br_mdb_ip_get(src->br, &sg_ip);
455 if (!mp)
456 return;
457
458 for (pp = &mp->ports;
459 (p = mlock_dereference(*pp, src->br)) != NULL;
460 pp = &p->next) {
461 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
462 continue;
463
464 if (p->rt_protocol != RTPROT_KERNEL &&
465 (p->flags & MDB_PG_FLAGS_PERMANENT))
466 break;
467
468 br_multicast_del_pg(mp, p, pp);
469 break;
470 }
471 src->flags &= ~BR_SGRP_F_INSTALLED;
472}
473
9116ffbf 474/* install S,G and based on src's timer enable or disable forwarding */
b0812368
NA		 475static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
476{
9116ffbf
NA		 477 struct net_bridge_port_group_sg_key sg_key;
478 struct net_bridge_port_group *sg;
479 u8 old_flags;
480
b0812368 481 br_multicast_fwd_src_add(src);
9116ffbf
NA		 482
483 memset(&sg_key, 0, sizeof(sg_key));
484 sg_key.addr = src->pg->key.addr;
485 sg_key.addr.src = src->addr.src;
486 sg_key.port = src->pg->key.port;
487
488 sg = br_sg_port_find(src->br, &sg_key);
489 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
490 return;
491
492 old_flags = sg->flags;
493 if (timer_pending(&src->timer))
494 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
495 else
496 sg->flags |= MDB_PG_FLAGS_BLOCKED;
497
498 if (old_flags != sg->flags) {
499 struct net_bridge_mdb_entry *sg_mp;
500
501 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
502 if (!sg_mp)
503 return;
504 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
505 }
b0812368
NA		 506}
507
e12cec65
NA		 508static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
509{
510 struct net_bridge_mdb_entry *mp;
511
512 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
513 WARN_ON(!hlist_unhashed(&mp->mdb_node));
514 WARN_ON(mp->ports);
515
516 del_timer_sync(&mp->timer);
517 kfree_rcu(mp, rcu);
518}
519
520static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
521{
522 struct net_bridge *br = mp->br;
523
524 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
525 br_mdb_rht_params);
526 hlist_del_init_rcu(&mp->mdb_node);
527 hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
528 queue_work(system_long_wq, &br->mcast_gc_work);
529}
530
88c1f37f 531static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 532{
88c1f37f 533 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 534 struct net_bridge *br = mp->br;
eb1d1641
HX		 535
536 spin_lock(&br->multicast_lock);
b0812368
NA		 537 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
538 timer_pending(&mp->timer))
eb1d1641
HX		 539 goto out;
540
1bc844ee 541 br_multicast_host_leave(mp, true);
eb1d1641
HX		 542
543 if (mp->ports)
544 goto out;
e12cec65
NA		 545 br_multicast_del_mdb_entry(mp);
546out:
547 spin_unlock(&br->multicast_lock);
548}
eb1d1641 549
e12cec65
NA		 550static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
551{
552 struct net_bridge_group_src *src;
eb1d1641 553
e12cec65
NA		 554 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
555 WARN_ON(!hlist_unhashed(&src->node));
eb1d1641 556
e12cec65
NA		 557 del_timer_sync(&src->timer);
558 kfree_rcu(src, rcu);
eb1d1641
HX		 559}
560
8b671779
NA		 561static void br_multicast_del_group_src(struct net_bridge_group_src *src)
562{
085b53c8 563 struct net_bridge *br = src->pg->key.port->br;
8b671779 564
b0812368 565 br_multicast_fwd_src_remove(src);
8b671779
NA		 566 hlist_del_init_rcu(&src->node);
567 src->pg->src_ents--;
e12cec65
NA		 568 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
569 queue_work(system_long_wq, &br->mcast_gc_work);
570}
571
572static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
573{
574 struct net_bridge_port_group *pg;
575
576 pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
577 WARN_ON(!hlist_unhashed(&pg->mglist));
578 WARN_ON(!hlist_empty(&pg->src_list));
579
580 del_timer_sync(&pg->rexmit_timer);
581 del_timer_sync(&pg->timer);
582 kfree_rcu(pg, rcu);
8b671779
NA		 583}
584
681590bd
NA		 585void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
586 struct net_bridge_port_group *pg,
587 struct net_bridge_port_group __rcu **pp)
588{
085b53c8 589 struct net_bridge *br = pg->key.port->br;
8b671779
NA		 590 struct net_bridge_group_src *ent;
591 struct hlist_node *tmp;
681590bd
NA		 592
593 rcu_assign_pointer(*pp, pg->next);
594 hlist_del_init(&pg->mglist);
8b671779
NA		 595 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
596 br_multicast_del_group_src(ent);
81f19838 597 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
74705582
NA		 598 if (!br_multicast_is_star_g(&mp->addr)) {
599 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
600 br_sg_port_rht_params);
8266a049 601 br_multicast_sg_del_exclude_ports(mp);
74705582 602 } else {
8266a049 603 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
74705582 604 }
e12cec65
NA		 605 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
606 queue_work(system_long_wq, &br->mcast_gc_work);
681590bd
NA		 607
608 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
609 mod_timer(&mp->timer, jiffies);
610}
611
612static void br_multicast_find_del_pg(struct net_bridge *br,
613 struct net_bridge_port_group *pg)
eb1d1641 614{
8b671779 615 struct net_bridge_port_group __rcu **pp;
eb1d1641
HX		 616 struct net_bridge_mdb_entry *mp;
617 struct net_bridge_port_group *p;
e8051688 618
085b53c8 619 mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641
HX		 620 if (WARN_ON(!mp))
621 return;
622
e8051688
ED		 623 for (pp = &mp->ports;
624 (p = mlock_dereference(*pp, br)) != NULL;
625 pp = &p->next) {
eb1d1641
HX		 626 if (p != pg)
627 continue;
628
681590bd 629 br_multicast_del_pg(mp, pg, pp);
eb1d1641
HX		 630 return;
631 }
632
633 WARN_ON(1);
634}
635
88c1f37f 636static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 637{
88c1f37f 638 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
d6c33d67 639 struct net_bridge_group_src *src_ent;
085b53c8 640 struct net_bridge *br = pg->key.port->br;
d6c33d67
NA		 641 struct hlist_node *tmp;
642 bool changed;
eb1d1641
HX		 643
644 spin_lock(&br->multicast_lock);
645 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 646 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 647 goto out;
648
d6c33d67
NA		 649 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
650 pg->filter_mode = MCAST_INCLUDE;
651 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
652 if (!timer_pending(&src_ent->timer)) {
653 br_multicast_del_group_src(src_ent);
654 changed = true;
655 }
656 }
657
658 if (hlist_empty(&pg->src_list)) {
659 br_multicast_find_del_pg(br, pg);
660 } else if (changed) {
085b53c8 661 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641 662
8266a049
NA		 663 if (changed && br_multicast_is_star_g(&pg->key.addr))
664 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
665
d6c33d67
NA		 666 if (WARN_ON(!mp))
667 goto out;
668 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
669 }
eb1d1641
HX		 670out:
671 spin_unlock(&br->multicast_lock);
672}
673
e12cec65
NA		 674static void br_multicast_gc(struct hlist_head *head)
675{
676 struct net_bridge_mcast_gc *gcent;
677 struct hlist_node *tmp;
678
679 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
680 hlist_del_init(&gcent->gc_node);
681 gcent->destroy(gcent);
682 }
683}
684
8ef2a9a5 685static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
438ef2d0
NA		 686 struct net_bridge_port_group *pg,
687 __be32 ip_dst, __be32 group,
688 bool with_srcs, bool over_lmqt,
42c11ccf
NA		 689 u8 sflag, u8 *igmp_type,
690 bool *need_rexmit)
eb1d1641 691{
085b53c8 692 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 693 struct net_bridge_group_src *ent;
694 size_t pkt_size, igmp_hdr_size;
695 unsigned long now = jiffies;
5e923585 696 struct igmpv3_query *ihv3;
438ef2d0
NA		 697 void *csum_start = NULL;
698 __sum16 *csum = NULL;
eb1d1641
HX		 699 struct sk_buff *skb;
700 struct igmphdr *ih;
701 struct ethhdr *eth;
438ef2d0 702 unsigned long lmqt;
eb1d1641 703 struct iphdr *iph;
438ef2d0 704 u16 lmqt_srcs = 0;
eb1d1641 705
5e923585 706 igmp_hdr_size = sizeof(*ih);
438ef2d0 707 if (br->multicast_igmp_version == 3) {
5e923585 708 igmp_hdr_size = sizeof(*ihv3);
438ef2d0
NA		 709 if (pg && with_srcs) {
710 lmqt = now + (br->multicast_last_member_interval *
711 br->multicast_last_member_count);
712 hlist_for_each_entry(ent, &pg->src_list, node) {
713 if (over_lmqt == time_after(ent->timer.expires,
714 lmqt) &&
715 ent->src_query_rexmit_cnt > 0)
716 lmqt_srcs++;
717 }
718
719 if (!lmqt_srcs)
720 return NULL;
721 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
722 }
723 }
724
725 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
726 if ((p && pkt_size > p->dev->mtu) ||
727 pkt_size > br->dev->mtu)
728 return NULL;
729
730 skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
eb1d1641
HX		 731 if (!skb)
732 goto out;
733
734 skb->protocol = htons(ETH_P_IP);
735
736 skb_reset_mac_header(skb);
737 eth = eth_hdr(skb);
738
e5a727f6 739 ether_addr_copy(eth->h_source, br->dev->dev_addr);
438ef2d0 740 ip_eth_mc_map(ip_dst, eth->h_dest);
eb1d1641
HX		 741 eth->h_proto = htons(ETH_P_IP);
742 skb_put(skb, sizeof(*eth));
743
744 skb_set_network_header(skb, skb->len);
745 iph = ip_hdr(skb);
438ef2d0 746 iph->tot_len = htons(pkt_size - sizeof(*eth));
eb1d1641
HX		 747
748 iph->version = 4;
749 iph->ihl = 6;
750 iph->tos = 0xc0;
eb1d1641
HX		 751 iph->id = 0;
752 iph->frag_off = htons(IP_DF);
753 iph->ttl = 1;
754 iph->protocol = IPPROTO_IGMP;
675779ad 755 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
1c8ad5bf 756 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
438ef2d0 757 iph->daddr = ip_dst;
eb1d1641
HX		 758 ((u8 *)&iph[1])[0] = IPOPT_RA;
759 ((u8 *)&iph[1])[1] = 4;
760 ((u8 *)&iph[1])[2] = 0;
761 ((u8 *)&iph[1])[3] = 0;
762 ip_send_check(iph);
763 skb_put(skb, 24);
764
765 skb_set_transport_header(skb, skb->len);
1080ab95 766 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 767
5e923585
NA		 768 switch (br->multicast_igmp_version) {
769 case 2:
770 ih = igmp_hdr(skb);
771 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
772 ih->code = (group ? br->multicast_last_member_interval :
773 br->multicast_query_response_interval) /
774 (HZ / IGMP_TIMER_SCALE);
775 ih->group = group;
776 ih->csum = 0;
438ef2d0
NA		 777 csum = &ih->csum;
778 csum_start = (void *)ih;
5e923585
NA		 779 break;
780 case 3:
781 ihv3 = igmpv3_query_hdr(skb);
782 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
783 ihv3->code = (group ? br->multicast_last_member_interval :
784 br->multicast_query_response_interval) /
785 (HZ / IGMP_TIMER_SCALE);
786 ihv3->group = group;
787 ihv3->qqic = br->multicast_query_interval / HZ;
438ef2d0 788 ihv3->nsrcs = htons(lmqt_srcs);
5e923585 789 ihv3->resv = 0;
438ef2d0 790 ihv3->suppress = sflag;
5e923585
NA		 791 ihv3->qrv = 2;
792 ihv3->csum = 0;
438ef2d0
NA		 793 csum = &ihv3->csum;
794 csum_start = (void *)ihv3;
795 if (!pg || !with_srcs)
796 break;
797
798 lmqt_srcs = 0;
799 hlist_for_each_entry(ent, &pg->src_list, node) {
800 if (over_lmqt == time_after(ent->timer.expires,
801 lmqt) &&
802 ent->src_query_rexmit_cnt > 0) {
deb96566 803 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
438ef2d0 804 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 805 if (need_rexmit && ent->src_query_rexmit_cnt)
806 *need_rexmit = true;
438ef2d0
NA		 807 }
808 }
809 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
810 kfree_skb(skb);
811 return NULL;
812 }
5e923585
NA		 813 break;
814 }
815
438ef2d0
NA		 816 if (WARN_ON(!csum || !csum_start)) {
817 kfree_skb(skb);
818 return NULL;
819 }
820
821 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
5e923585 822 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 823 __skb_pull(skb, sizeof(*eth));
824
825out:
826 return skb;
827}
828
dfd56b8b 829#if IS_ENABLED(CONFIG_IPV6)
08b202b6 830static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
438ef2d0
NA		 831 struct net_bridge_port_group *pg,
832 const struct in6_addr *ip6_dst,
833 const struct in6_addr *group,
834 bool with_srcs, bool over_llqt,
42c11ccf
NA		 835 u8 sflag, u8 *igmp_type,
836 bool *need_rexmit)
08b202b6 837{
085b53c8 838 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 839 struct net_bridge_group_src *ent;
840 size_t pkt_size, mld_hdr_size;
841 unsigned long now = jiffies;
aa2ae3e7 842 struct mld2_query *mld2q;
438ef2d0 843 void *csum_start = NULL;
aa2ae3e7 844 unsigned long interval;
438ef2d0 845 __sum16 *csum = NULL;
08b202b6
YH		 846 struct ipv6hdr *ip6h;
847 struct mld_msg *mldq;
aa2ae3e7 848 struct sk_buff *skb;
438ef2d0 849 unsigned long llqt;
08b202b6 850 struct ethhdr *eth;
438ef2d0 851 u16 llqt_srcs = 0;
08b202b6 852 u8 *hopopt;
08b202b6 853
aa2ae3e7 854 mld_hdr_size = sizeof(*mldq);
438ef2d0 855 if (br->multicast_mld_version == 2) {
aa2ae3e7 856 mld_hdr_size = sizeof(*mld2q);
438ef2d0
NA		 857 if (pg && with_srcs) {
858 llqt = now + (br->multicast_last_member_interval *
859 br->multicast_last_member_count);
860 hlist_for_each_entry(ent, &pg->src_list, node) {
861 if (over_llqt == time_after(ent->timer.expires,
862 llqt) &&
863 ent->src_query_rexmit_cnt > 0)
864 llqt_srcs++;
865 }
866
867 if (!llqt_srcs)
868 return NULL;
869 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
870 }
871 }
872
873 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
874 if ((p && pkt_size > p->dev->mtu) ||
875 pkt_size > br->dev->mtu)
876 return NULL;
877
878 skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
08b202b6
YH		 879 if (!skb)
880 goto out;
881
882 skb->protocol = htons(ETH_P_IPV6);
883
884 /* Ethernet header */
885 skb_reset_mac_header(skb);
886 eth = eth_hdr(skb);
887
e5a727f6 888 ether_addr_copy(eth->h_source, br->dev->dev_addr);
08b202b6
YH		 889 eth->h_proto = htons(ETH_P_IPV6);
890 skb_put(skb, sizeof(*eth));
891
892 /* IPv6 header + HbH option */
893 skb_set_network_header(skb, skb->len);
894 ip6h = ipv6_hdr(skb);
895
896 *(__force __be32 *)ip6h = htonl(0x60000000);
aa2ae3e7 897 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 898 ip6h->nexthdr = IPPROTO_HOPOPTS;
899 ip6h->hop_limit = 1;
438ef2d0 900 ip6h->daddr = *ip6_dst;
d1d81d4c
UW		 901 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
902 &ip6h->saddr)) {
903 kfree_skb(skb);
675779ad 904 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 905 return NULL;
906 }
0888d5f3 907
675779ad 908 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 909 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 910
911 hopopt = (u8 *)(ip6h + 1);
912 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
913 hopopt[1] = 0; /* length of HbH */
914 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
915 hopopt[3] = 2; /* Length of RA Option */
916 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
917 hopopt[5] = 0;
1de5a71c
EZ		 918 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
919 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 920
921 skb_put(skb, sizeof(*ip6h) + 8);
922
923 /* ICMPv6 */
924 skb_set_transport_header(skb, skb->len);
438ef2d0 925 interval = ipv6_addr_any(group) ?
32de868c
LL		 926 br->multicast_query_response_interval :
927 br->multicast_last_member_interval;
1080ab95 928 *igmp_type = ICMPV6_MGM_QUERY;
aa2ae3e7
NA		 929 switch (br->multicast_mld_version) {
930 case 1:
931 mldq = (struct mld_msg *)icmp6_hdr(skb);
932 mldq->mld_type = ICMPV6_MGM_QUERY;
933 mldq->mld_code = 0;
934 mldq->mld_cksum = 0;
935 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
936 mldq->mld_reserved = 0;
438ef2d0
NA		 937 mldq->mld_mca = *group;
938 csum = &mldq->mld_cksum;
939 csum_start = (void *)mldq;
aa2ae3e7
NA		 940 break;
941 case 2:
942 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 943 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 944 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
945 mld2q->mld2q_code = 0;
946 mld2q->mld2q_cksum = 0;
947 mld2q->mld2q_resv1 = 0;
948 mld2q->mld2q_resv2 = 0;
438ef2d0 949 mld2q->mld2q_suppress = sflag;
aa2ae3e7 950 mld2q->mld2q_qrv = 2;
438ef2d0 951 mld2q->mld2q_nsrcs = htons(llqt_srcs);
aa2ae3e7 952 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
438ef2d0
NA		 953 mld2q->mld2q_mca = *group;
954 csum = &mld2q->mld2q_cksum;
955 csum_start = (void *)mld2q;
956 if (!pg || !with_srcs)
957 break;
958
959 llqt_srcs = 0;
960 hlist_for_each_entry(ent, &pg->src_list, node) {
961 if (over_llqt == time_after(ent->timer.expires,
962 llqt) &&
963 ent->src_query_rexmit_cnt > 0) {
deb96566 964 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
438ef2d0 965 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 966 if (need_rexmit && ent->src_query_rexmit_cnt)
967 *need_rexmit = true;
438ef2d0
NA		 968 }
969 }
970 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
971 kfree_skb(skb);
972 return NULL;
973 }
aa2ae3e7
NA		 974 break;
975 }
08b202b6 976
438ef2d0
NA		 977 if (WARN_ON(!csum || !csum_start)) {
978 kfree_skb(skb);
979 return NULL;
980 }
981
982 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
983 IPPROTO_ICMPV6,
984 csum_partial(csum_start, mld_hdr_size, 0));
985 skb_put(skb, mld_hdr_size);
08b202b6
YH		 986 __skb_pull(skb, sizeof(*eth));
987
988out:
989 return skb;
990}
991#endif
992
8ef2a9a5 993static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
438ef2d0
NA		 994 struct net_bridge_port_group *pg,
995 struct br_ip *ip_dst,
996 struct br_ip *group,
997 bool with_srcs, bool over_lmqt,
42c11ccf
NA		 998 u8 sflag, u8 *igmp_type,
999 bool *need_rexmit)
8ef2a9a5 1000{
438ef2d0
NA		 1001 __be32 ip4_dst;
1002
1003 switch (group->proto) {
8ef2a9a5 1004 case htons(ETH_P_IP):
eab3227b 1005 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
438ef2d0 1006 return br_ip4_multicast_alloc_query(br, pg,
eab3227b 1007 ip4_dst, group->dst.ip4,
438ef2d0 1008 with_srcs, over_lmqt,
42c11ccf
NA		 1009 sflag, igmp_type,
1010 need_rexmit);
dfd56b8b 1011#if IS_ENABLED(CONFIG_IPV6)
438ef2d0
NA		 1012 case htons(ETH_P_IPV6): {
1013 struct in6_addr ip6_dst;
1014
1015 if (ip_dst)
eab3227b 1016 ip6_dst = ip_dst->dst.ip6;
438ef2d0
NA		 1017 else
1018 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1019 htonl(1));
1020
1021 return br_ip6_multicast_alloc_query(br, pg,
eab3227b 1022 &ip6_dst, &group->dst.ip6,
438ef2d0 1023 with_srcs, over_lmqt,
42c11ccf
NA		 1024 sflag, igmp_type,
1025 need_rexmit);
438ef2d0 1026 }
08b202b6 1027#endif
8ef2a9a5
YH		 1028 }
1029 return NULL;
1030}
1031
cfd56754 1032struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 1033 struct br_ip *group)
eb1d1641 1034{
eb1d1641 1035 struct net_bridge_mdb_entry *mp;
4c0833bc 1036 int err;
eb1d1641 1037
19e3a9c9
NA		 1038 mp = br_mdb_ip_get(br, group);
1039 if (mp)
1040 return mp;
eb1d1641 1041
19e3a9c9
NA		 1042 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
1043 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1044 return ERR_PTR(-E2BIG);
eb1d1641
HX		 1045 }
1046
1047 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1048 if (unlikely(!mp))
4c0833bc 1049 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 1050
1051 mp->br = br;
8ef2a9a5 1052 mp->addr = *group;
e12cec65 1053 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
88c1f37f 1054 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 1055 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1056 br_mdb_rht_params);
1057 if (err) {
1058 kfree(mp);
1059 mp = ERR_PTR(err);
1060 } else {
1061 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1062 }
1faabf2a 1063
eb1d1641
HX		 1064 return mp;
1065}
1066
8b671779
NA		 1067static void br_multicast_group_src_expired(struct timer_list *t)
1068{
1069 struct net_bridge_group_src *src = from_timer(src, t, timer);
1070 struct net_bridge_port_group *pg;
1071 struct net_bridge *br = src->br;
1072
1073 spin_lock(&br->multicast_lock);
1074 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1075 timer_pending(&src->timer))
1076 goto out;
1077
1078 pg = src->pg;
1079 if (pg->filter_mode == MCAST_INCLUDE) {
1080 br_multicast_del_group_src(src);
1081 if (!hlist_empty(&pg->src_list))
1082 goto out;
1083 br_multicast_find_del_pg(br, pg);
9116ffbf
NA		 1084 } else {
1085 br_multicast_fwd_src_handle(src);
8b671779 1086 }
9116ffbf 1087
8b671779
NA		 1088out:
1089 spin_unlock(&br->multicast_lock);
1090}
1091
1092static struct net_bridge_group_src *
1093br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1094{
1095 struct net_bridge_group_src *ent;
1096
1097 switch (ip->proto) {
1098 case htons(ETH_P_IP):
1099 hlist_for_each_entry(ent, &pg->src_list, node)
deb96566 1100 if (ip->src.ip4 == ent->addr.src.ip4)
8b671779
NA		 1101 return ent;
1102 break;
1103#if IS_ENABLED(CONFIG_IPV6)
1104 case htons(ETH_P_IPV6):
1105 hlist_for_each_entry(ent, &pg->src_list, node)
deb96566 1106 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
8b671779
NA		 1107 return ent;
1108 break;
1109#endif
1110 }
1111
1112 return NULL;
1113}
1114
1115static struct net_bridge_group_src *
1116br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1117{
1118 struct net_bridge_group_src *grp_src;
1119
1120 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1121 return NULL;
1122
1123 switch (src_ip->proto) {
1124 case htons(ETH_P_IP):
deb96566
NA		 1125 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1126 ipv4_is_multicast(src_ip->src.ip4))
8b671779
NA		 1127 return NULL;
1128 break;
1129#if IS_ENABLED(CONFIG_IPV6)
1130 case htons(ETH_P_IPV6):
deb96566
NA		 1131 if (ipv6_addr_any(&src_ip->src.ip6) ||
1132 ipv6_addr_is_multicast(&src_ip->src.ip6))
8b671779
NA		 1133 return NULL;
1134 break;
1135#endif
1136 }
1137
1138 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1139 if (unlikely(!grp_src))
1140 return NULL;
1141
1142 grp_src->pg = pg;
085b53c8 1143 grp_src->br = pg->key.port->br;
8b671779 1144 grp_src->addr = *src_ip;
e12cec65 1145 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
8b671779
NA		 1146 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1147
1148 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1149 pg->src_ents++;
1150
1151 return grp_src;
1152}
1153
cfd56754
CW		 1154struct net_bridge_port_group *br_multicast_new_port_group(
1155 struct net_bridge_port *port,
1156 struct br_ip *group,
ccb1c31a 1157 struct net_bridge_port_group __rcu *next,
6db6f0ea 1158 unsigned char flags,
8b671779 1159 const unsigned char *src,
8f8cb77e
NA		 1160 u8 filter_mode,
1161 u8 rt_protocol)
cfd56754
CW		 1162{
1163 struct net_bridge_port_group *p;
1164
1165 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1166 if (unlikely(!p))
1167 return NULL;
1168
085b53c8
NA		 1169 p->key.addr = *group;
1170 p->key.port = port;
9d06b6d8 1171 p->flags = flags;
8b671779 1172 p->filter_mode = filter_mode;
8f8cb77e 1173 p->rt_protocol = rt_protocol;
e12cec65 1174 p->mcast_gc.destroy = br_multicast_destroy_port_group;
8b671779 1175 INIT_HLIST_HEAD(&p->src_list);
085b53c8
NA		 1176
1177 if (!br_multicast_is_star_g(group) &&
1178 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1179 br_sg_port_rht_params)) {
1180 kfree(p);
1181 return NULL;
1182 }
1183
eca2a43b 1184 rcu_assign_pointer(p->next, next);
88c1f37f 1185 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
42c11ccf
NA		 1186 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1187 hlist_add_head(&p->mglist, &port->mglist);
6db6f0ea
FF		 1188
1189 if (src)
1190 memcpy(p->eth_addr, src, ETH_ALEN);
1191 else
1bfe45f4 1192 eth_broadcast_addr(p->eth_addr);
6db6f0ea 1193
cfd56754
CW		 1194 return p;
1195}
1196
1bc844ee
NA		 1197void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify)
1198{
1199 if (!mp->host_joined) {
1200 mp->host_joined = true;
094b82fd
NA		 1201 if (br_multicast_is_star_g(&mp->addr))
1202 br_multicast_star_g_host_state(mp);
1bc844ee 1203 if (notify)
81f19838 1204 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1bc844ee
NA		 1205 }
1206 mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval);
1207}
1208
1209void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1210{
1211 if (!mp->host_joined)
1212 return;
1213
1214 mp->host_joined = false;
094b82fd
NA		 1215 if (br_multicast_is_star_g(&mp->addr))
1216 br_multicast_star_g_host_state(mp);
1bc844ee 1217 if (notify)
81f19838 1218 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1bc844ee
NA		 1219}
1220
b0812368
NA		 1221static struct net_bridge_port_group *
1222__br_multicast_add_group(struct net_bridge *br,
1223 struct net_bridge_port *port,
1224 struct br_ip *group,
1225 const unsigned char *src,
1226 u8 filter_mode,
9116ffbf
NA		 1227 bool igmpv2_mldv1,
1228 bool blocked)
eb1d1641 1229{
e8051688 1230 struct net_bridge_port_group __rcu **pp;
b0812368 1231 struct net_bridge_port_group *p = NULL;
5e923585 1232 struct net_bridge_mdb_entry *mp;
454594f3 1233 unsigned long now = jiffies;
eb1d1641 1234
eb1d1641
HX		 1235 if (!netif_running(br->dev) ||
1236 (port && port->state == BR_STATE_DISABLED))
1237 goto out;
1238
19e3a9c9 1239 mp = br_multicast_new_group(br, group);
4c0833bc 1240 if (IS_ERR(mp))
b0812368 1241 return ERR_PTR(PTR_ERR(mp));
eb1d1641
HX		 1242
1243 if (!port) {
1bc844ee 1244 br_multicast_host_join(mp, true);
eb1d1641
HX		 1245 goto out;
1246 }
1247
e8051688
ED		 1248 for (pp = &mp->ports;
1249 (p = mlock_dereference(*pp, br)) != NULL;
1250 pp = &p->next) {
6db6f0ea 1251 if (br_port_group_equal(p, port, src))
454594f3 1252 goto found;
085b53c8 1253 if ((unsigned long)p->key.port < (unsigned long)port)
eb1d1641
HX		 1254 break;
1255 }
1256
8f8cb77e
NA		 1257 p = br_multicast_new_port_group(port, group, *pp, 0, src, filter_mode,
1258 RTPROT_KERNEL);
b0812368
NA		 1259 if (unlikely(!p)) {
1260 p = ERR_PTR(-ENOMEM);
1261 goto out;
1262 }
eb1d1641 1263 rcu_assign_pointer(*pp, p);
9116ffbf
NA		 1264 if (blocked)
1265 p->flags |= MDB_PG_FLAGS_BLOCKED;
81f19838 1266 br_mdb_notify(br->dev, mp, p, RTM_NEWMDB);
eb1d1641 1267
454594f3 1268found:
0436862e
NA		 1269 if (igmpv2_mldv1)
1270 mod_timer(&p->timer, now + br->multicast_membership_interval);
81f19838 1271
eb1d1641 1272out:
b0812368
NA		 1273 return p;
1274}
1275
1276static int br_multicast_add_group(struct net_bridge *br,
1277 struct net_bridge_port *port,
1278 struct br_ip *group,
1279 const unsigned char *src,
1280 u8 filter_mode,
1281 bool igmpv2_mldv1)
1282{
1283 struct net_bridge_port_group *pg;
1284 int err;
eb1d1641 1285
b0812368
NA		 1286 spin_lock(&br->multicast_lock);
1287 pg = __br_multicast_add_group(br, port, group, src, filter_mode,
9116ffbf 1288 igmpv2_mldv1, false);
b0812368
NA		 1289 /* NULL is considered valid for host joined groups */
1290 err = IS_ERR(pg) ? PTR_ERR(pg) : 0;
eb1d1641 1291 spin_unlock(&br->multicast_lock);
b0812368 1292
eb1d1641
HX		 1293 return err;
1294}
1295
8ef2a9a5
YH		 1296static int br_ip4_multicast_add_group(struct net_bridge *br,
1297 struct net_bridge_port *port,
b0e9a30d 1298 __be32 group,
6db6f0ea 1299 __u16 vid,
8b671779
NA		 1300 const unsigned char *src,
1301 bool igmpv2)
8ef2a9a5
YH		 1302{
1303 struct br_ip br_group;
8b671779 1304 u8 filter_mode;
8ef2a9a5
YH		 1305
1306 if (ipv4_is_local_multicast(group))
1307 return 0;
1308
1515a63f 1309 memset(&br_group, 0, sizeof(br_group));
eab3227b 1310 br_group.dst.ip4 = group;
8ef2a9a5 1311 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1312 br_group.vid = vid;
8b671779 1313 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
8ef2a9a5 1314
0436862e
NA		 1315 return br_multicast_add_group(br, port, &br_group, src, filter_mode,
1316 igmpv2);
8ef2a9a5
YH		 1317}
1318
dfd56b8b 1319#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 1320static int br_ip6_multicast_add_group(struct net_bridge *br,
1321 struct net_bridge_port *port,
b0e9a30d 1322 const struct in6_addr *group,
6db6f0ea 1323 __u16 vid,
8b671779
NA		 1324 const unsigned char *src,
1325 bool mldv1)
08b202b6
YH		 1326{
1327 struct br_ip br_group;
8b671779 1328 u8 filter_mode;
08b202b6 1329
3c3769e6 1330 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1331 return 0;
1332
19e3a9c9 1333 memset(&br_group, 0, sizeof(br_group));
eab3227b 1334 br_group.dst.ip6 = *group;
9cc6e0c4 1335 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1336 br_group.vid = vid;
8b671779 1337 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
08b202b6 1338
0436862e
NA		 1339 return br_multicast_add_group(br, port, &br_group, src, filter_mode,
1340 mldv1);
08b202b6
YH		 1341}
1342#endif
1343
88c1f37f 1344static void br_multicast_router_expired(struct timer_list *t)
eb1d1641 1345{
88c1f37f
AP		 1346 struct net_bridge_port *port =
1347 from_timer(port, t, multicast_router_timer);
eb1d1641
HX		 1348 struct net_bridge *br = port->br;
1349
1350 spin_lock(&br->multicast_lock);
a55d8246
NA		 1351 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1352 port->multicast_router == MDB_RTR_TYPE_PERM ||
f12e7d95 1353 timer_pending(&port->multicast_router_timer))
eb1d1641
HX		 1354 goto out;
1355
f12e7d95 1356 __del_port_router(port);
eb1d1641
HX		 1357out:
1358 spin_unlock(&br->multicast_lock);
1359}
1360
77041420
YG		 1361static void br_mc_router_state_change(struct net_bridge *p,
1362 bool is_mc_router)
1363{
1364 struct switchdev_attr attr = {
1365 .orig_dev = p->dev,
1366 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1367 .flags = SWITCHDEV_F_DEFER,
1368 .u.mrouter = is_mc_router,
1369 };
1370
1371 switchdev_port_attr_set(p->dev, &attr);
1372}
1373
88c1f37f 1374static void br_multicast_local_router_expired(struct timer_list *t)
eb1d1641 1375{
88c1f37f 1376 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
77041420
YG		 1377
1378 spin_lock(&br->multicast_lock);
1379 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
1380 br->multicast_router == MDB_RTR_TYPE_PERM ||
1381 timer_pending(&br->multicast_router_timer))
1382 goto out;
1383
1384 br_mc_router_state_change(br, false);
1385out:
1386 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 1387}
1388
cc0fdd80 1389static void br_multicast_querier_expired(struct net_bridge *br,
90010b36 1390 struct bridge_mcast_own_query *query)
c83b8fab 1391{
c83b8fab 1392 spin_lock(&br->multicast_lock);
13cefad2 1393 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 1394 goto out;
1395
cc0fdd80 1396 br_multicast_start_querier(br, query);
c83b8fab
HX		 1397
1398out:
1399 spin_unlock(&br->multicast_lock);
1400}
1401
88c1f37f 1402static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1403{
88c1f37f 1404 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
cc0fdd80 1405
90010b36 1406 br_multicast_querier_expired(br, &br->ip4_own_query);
cc0fdd80
LL		 1407}
1408
1409#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1410static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1411{
88c1f37f 1412 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
cc0fdd80 1413
90010b36 1414 br_multicast_querier_expired(br, &br->ip6_own_query);
cc0fdd80
LL		 1415}
1416#endif
1417
dc4eb53a
LL		 1418static void br_multicast_select_own_querier(struct net_bridge *br,
1419 struct br_ip *ip,
1420 struct sk_buff *skb)
1421{
1422 if (ip->proto == htons(ETH_P_IP))
deb96566 1423 br->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
dc4eb53a
LL		 1424#if IS_ENABLED(CONFIG_IPV6)
1425 else
deb96566 1426 br->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
dc4eb53a
LL		 1427#endif
1428}
1429
8ef2a9a5
YH		 1430static void __br_multicast_send_query(struct net_bridge *br,
1431 struct net_bridge_port *port,
438ef2d0
NA		 1432 struct net_bridge_port_group *pg,
1433 struct br_ip *ip_dst,
1434 struct br_ip *group,
1435 bool with_srcs,
42c11ccf
NA		 1436 u8 sflag,
1437 bool *need_rexmit)
eb1d1641 1438{
438ef2d0 1439 bool over_lmqt = !!sflag;
eb1d1641 1440 struct sk_buff *skb;
1080ab95 1441 u8 igmp_type;
eb1d1641 1442
438ef2d0
NA		 1443again_under_lmqt:
1444 skb = br_multicast_alloc_query(br, pg, ip_dst, group, with_srcs,
42c11ccf
NA		 1445 over_lmqt, sflag, &igmp_type,
1446 need_rexmit);
eb1d1641 1447 if (!skb)
8ef2a9a5 1448 return;
eb1d1641
HX		 1449
1450 if (port) {
eb1d1641 1451 skb->dev = port->dev;
a65056ec 1452 br_multicast_count(br, port, skb, igmp_type,
1080ab95 1453 BR_MCAST_DIR_TX);
29a26a56
EB		 1454 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
1455 dev_net(port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 1456 br_dev_queue_push_xmit);
438ef2d0
NA		 1457
1458 if (over_lmqt && with_srcs && sflag) {
1459 over_lmqt = false;
1460 goto again_under_lmqt;
1461 }
dc4eb53a 1462 } else {
438ef2d0 1463 br_multicast_select_own_querier(br, group, skb);
a65056ec 1464 br_multicast_count(br, port, skb, igmp_type,
1080ab95 1465 BR_MCAST_DIR_RX);
eb1d1641 1466 netif_rx(skb);
dc4eb53a 1467 }
8ef2a9a5
YH		 1468}
1469
1470static void br_multicast_send_query(struct net_bridge *br,
cc0fdd80 1471 struct net_bridge_port *port,
90010b36 1472 struct bridge_mcast_own_query *own_query)
8ef2a9a5 1473{
90010b36 1474 struct bridge_mcast_other_query *other_query = NULL;
5e923585
NA		 1475 struct br_ip br_group;
1476 unsigned long time;
8ef2a9a5 1477
13cefad2
NA		 1478 if (!netif_running(br->dev) ||
1479 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
675779ad 1480 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
8ef2a9a5
YH		 1481 return;
1482
eab3227b 1483 memset(&br_group.dst, 0, sizeof(br_group.dst));
08b202b6 1484
90010b36
LL		 1485 if (port ? (own_query == &port->ip4_own_query) :
1486 (own_query == &br->ip4_own_query)) {
1487 other_query = &br->ip4_other_query;
cc0fdd80 1488 br_group.proto = htons(ETH_P_IP);
dfd56b8b 1489#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 1490 } else {
90010b36 1491 other_query = &br->ip6_other_query;
cc0fdd80 1492 br_group.proto = htons(ETH_P_IPV6);
08b202b6 1493#endif
cc0fdd80
LL		 1494 }
1495
90010b36 1496 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 1497 return;
1498
42c11ccf
NA		 1499 __br_multicast_send_query(br, port, NULL, NULL, &br_group, false, 0,
1500 NULL);
eb1d1641 1501
eb1d1641 1502 time = jiffies;
90010b36 1503 time += own_query->startup_sent < br->multicast_startup_query_count ?
eb1d1641
HX		 1504 br->multicast_startup_query_interval :
1505 br->multicast_query_interval;
90010b36 1506 mod_timer(&own_query->timer, time);
eb1d1641
HX		 1507}
1508
90010b36
LL		 1509static void
1510br_multicast_port_query_expired(struct net_bridge_port *port,
1511 struct bridge_mcast_own_query *query)
eb1d1641 1512{
eb1d1641
HX		 1513 struct net_bridge *br = port->br;
1514
1515 spin_lock(&br->multicast_lock);
02a780c0
DC		 1516 if (port->state == BR_STATE_DISABLED ||
1517 port->state == BR_STATE_BLOCKING)
eb1d1641
HX		 1518 goto out;
1519
cc0fdd80
LL		 1520 if (query->startup_sent < br->multicast_startup_query_count)
1521 query->startup_sent++;
eb1d1641 1522
cc0fdd80 1523 br_multicast_send_query(port->br, port, query);
eb1d1641
HX		 1524
1525out:
1526 spin_unlock(&br->multicast_lock);
1527}
1528
88c1f37f 1529static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1530{
88c1f37f 1531 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
cc0fdd80 1532
90010b36 1533 br_multicast_port_query_expired(port, &port->ip4_own_query);
cc0fdd80
LL		 1534}
1535
1536#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1537static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1538{
88c1f37f 1539 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
cc0fdd80 1540
90010b36 1541 br_multicast_port_query_expired(port, &port->ip6_own_query);
cc0fdd80
LL		 1542}
1543#endif
1544
42c11ccf
NA		 1545static void br_multicast_port_group_rexmit(struct timer_list *t)
1546{
1547 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1548 struct bridge_mcast_other_query *other_query = NULL;
085b53c8 1549 struct net_bridge *br = pg->key.port->br;
42c11ccf
NA		 1550 bool need_rexmit = false;
1551
1552 spin_lock(&br->multicast_lock);
1553 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
1554 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1555 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
1556 goto out;
1557
085b53c8 1558 if (pg->key.addr.proto == htons(ETH_P_IP))
42c11ccf
NA		 1559 other_query = &br->ip4_other_query;
1560#if IS_ENABLED(CONFIG_IPV6)
1561 else
1562 other_query = &br->ip6_other_query;
1563#endif
1564
1565 if (!other_query || timer_pending(&other_query->timer))
1566 goto out;
1567
1568 if (pg->grp_query_rexmit_cnt) {
1569 pg->grp_query_rexmit_cnt--;
085b53c8
NA		 1570 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1571 &pg->key.addr, false, 1, NULL);
42c11ccf 1572 }
085b53c8
NA		 1573 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1574 &pg->key.addr, true, 0, &need_rexmit);
42c11ccf
NA		 1575
1576 if (pg->grp_query_rexmit_cnt || need_rexmit)
1577 mod_timer(&pg->rexmit_timer, jiffies +
1578 br->multicast_last_member_interval);
1579out:
1580 spin_unlock(&br->multicast_lock);
1581}
1582
147c1e9b
NF		 1583static void br_mc_disabled_update(struct net_device *dev, bool value)
1584{
1585 struct switchdev_attr attr = {
1586 .orig_dev = dev,
1587 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1588 .flags = SWITCHDEV_F_DEFER,
13cefad2 1589 .u.mc_disabled = !value,
147c1e9b
NF		 1590 };
1591
1592 switchdev_port_attr_set(dev, &attr);
1593}
1594
1080ab95 1595int br_multicast_add_port(struct net_bridge_port *port)
eb1d1641 1596{
7f0aec7a 1597 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641 1598
88c1f37f
AP		 1599 timer_setup(&port->multicast_router_timer,
1600 br_multicast_router_expired, 0);
1601 timer_setup(&port->ip4_own_query.timer,
1602 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 1603#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 1604 timer_setup(&port->ip6_own_query.timer,
1605 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 1606#endif
13cefad2
NA		 1607 br_mc_disabled_update(port->dev,
1608 br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
147c1e9b 1609
1080ab95
NA		 1610 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
1611 if (!port->mcast_stats)
1612 return -ENOMEM;
1613
1614 return 0;
eb1d1641
HX		 1615}
1616
1617void br_multicast_del_port(struct net_bridge_port *port)
1618{
e10177ab
SA		 1619 struct net_bridge *br = port->br;
1620 struct net_bridge_port_group *pg;
e12cec65 1621 HLIST_HEAD(deleted_head);
e10177ab
SA		 1622 struct hlist_node *n;
1623
1624 /* Take care of the remaining groups, only perm ones should be left */
1625 spin_lock_bh(&br->multicast_lock);
1626 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
681590bd 1627 br_multicast_find_del_pg(br, pg);
e12cec65 1628 hlist_move_list(&br->mcast_gc_list, &deleted_head);
e10177ab 1629 spin_unlock_bh(&br->multicast_lock);
e12cec65 1630 br_multicast_gc(&deleted_head);
eb1d1641 1631 del_timer_sync(&port->multicast_router_timer);
1080ab95 1632 free_percpu(port->mcast_stats);
eb1d1641
HX		 1633}
1634
90010b36 1635static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 1636{
cc0fdd80 1637 query->startup_sent = 0;
561f1103 1638
cc0fdd80
LL		 1639 if (try_to_del_timer_sync(&query->timer) >= 0 ||
1640 del_timer(&query->timer))
1641 mod_timer(&query->timer, jiffies);
561f1103
HX		 1642}
1643
7cb3f921 1644static void __br_multicast_enable_port(struct net_bridge_port *port)
eb1d1641
HX		 1645{
1646 struct net_bridge *br = port->br;
1647
13cefad2 1648 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
7cb3f921 1649 return;
eb1d1641 1650
90010b36 1651 br_multicast_enable(&port->ip4_own_query);
cc0fdd80 1652#if IS_ENABLED(CONFIG_IPV6)
90010b36 1653 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 1654#endif
7f0aec7a
NA		 1655 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
1656 hlist_unhashed(&port->rlist))
754bc547 1657 br_multicast_add_router(br, port);
7cb3f921 1658}
eb1d1641 1659
7cb3f921
NA		 1660void br_multicast_enable_port(struct net_bridge_port *port)
1661{
1662 struct net_bridge *br = port->br;
1663
1664 spin_lock(&br->multicast_lock);
1665 __br_multicast_enable_port(port);
eb1d1641
HX		 1666 spin_unlock(&br->multicast_lock);
1667}
1668
1669void br_multicast_disable_port(struct net_bridge_port *port)
1670{
1671 struct net_bridge *br = port->br;
1672 struct net_bridge_port_group *pg;
b67bfe0d 1673 struct hlist_node *n;
eb1d1641
HX		 1674
1675 spin_lock(&br->multicast_lock);
b67bfe0d 1676 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
9d06b6d8 1677 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
681590bd 1678 br_multicast_find_del_pg(br, pg);
eb1d1641 1679
f12e7d95
NF		 1680 __del_port_router(port);
1681
eb1d1641 1682 del_timer(&port->multicast_router_timer);
90010b36 1683 del_timer(&port->ip4_own_query.timer);
cc0fdd80 1684#if IS_ENABLED(CONFIG_IPV6)
90010b36 1685 del_timer(&port->ip6_own_query.timer);
cc0fdd80 1686#endif
eb1d1641
HX		 1687 spin_unlock(&br->multicast_lock);
1688}
1689
e6231bca
NA		 1690static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
1691{
1692 struct net_bridge_group_src *ent;
1693 struct hlist_node *tmp;
1694 int deleted = 0;
1695
1696 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
1697 if (ent->flags & BR_SGRP_F_DELETE) {
1698 br_multicast_del_group_src(ent);
1699 deleted++;
1700 }
1701
1702 return deleted;
1703}
1704
b0812368
NA		 1705static void __grp_src_mod_timer(struct net_bridge_group_src *src,
1706 unsigned long expires)
1707{
1708 mod_timer(&src->timer, expires);
1709 br_multicast_fwd_src_handle(src);
1710}
1711
5bf1e00b
NA		 1712static void __grp_src_query_marked_and_rexmit(struct net_bridge_port_group *pg)
1713{
1714 struct bridge_mcast_other_query *other_query = NULL;
085b53c8 1715 struct net_bridge *br = pg->key.port->br;
5bf1e00b
NA		 1716 u32 lmqc = br->multicast_last_member_count;
1717 unsigned long lmqt, lmi, now = jiffies;
1718 struct net_bridge_group_src *ent;
1719
1720 if (!netif_running(br->dev) ||
1721 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1722 return;
1723
085b53c8 1724 if (pg->key.addr.proto == htons(ETH_P_IP))
5bf1e00b
NA		 1725 other_query = &br->ip4_other_query;
1726#if IS_ENABLED(CONFIG_IPV6)
1727 else
1728 other_query = &br->ip6_other_query;
1729#endif
1730
1731 lmqt = now + br_multicast_lmqt(br);
1732 hlist_for_each_entry(ent, &pg->src_list, node) {
1733 if (ent->flags & BR_SGRP_F_SEND) {
1734 ent->flags &= ~BR_SGRP_F_SEND;
1735 if (ent->timer.expires > lmqt) {
1736 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
1737 other_query &&
1738 !timer_pending(&other_query->timer))
1739 ent->src_query_rexmit_cnt = lmqc;
b0812368 1740 __grp_src_mod_timer(ent, lmqt);
5bf1e00b
NA		 1741 }
1742 }
1743 }
1744
1745 if (!br_opt_get(br, BROPT_MULTICAST_QUERIER) ||
1746 !other_query || timer_pending(&other_query->timer))
1747 return;
1748
085b53c8
NA		 1749 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1750 &pg->key.addr, true, 1, NULL);
5bf1e00b
NA		 1751
1752 lmi = now + br->multicast_last_member_interval;
1753 if (!timer_pending(&pg->rexmit_timer) ||
1754 time_after(pg->rexmit_timer.expires, lmi))
1755 mod_timer(&pg->rexmit_timer, lmi);
1756}
1757
1758static void __grp_send_query_and_rexmit(struct net_bridge_port_group *pg)
1759{
1760 struct bridge_mcast_other_query *other_query = NULL;
085b53c8 1761 struct net_bridge *br = pg->key.port->br;
5bf1e00b
NA		 1762 unsigned long now = jiffies, lmi;
1763
1764 if (!netif_running(br->dev) ||
1765 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1766 return;
1767
085b53c8 1768 if (pg->key.addr.proto == htons(ETH_P_IP))
5bf1e00b
NA		 1769 other_query = &br->ip4_other_query;
1770#if IS_ENABLED(CONFIG_IPV6)
1771 else
1772 other_query = &br->ip6_other_query;
1773#endif
1774
1775 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
1776 other_query && !timer_pending(&other_query->timer)) {
1777 lmi = now + br->multicast_last_member_interval;
1778 pg->grp_query_rexmit_cnt = br->multicast_last_member_count - 1;
085b53c8
NA		 1779 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1780 &pg->key.addr, false, 0, NULL);
5bf1e00b
NA		 1781 if (!timer_pending(&pg->rexmit_timer) ||
1782 time_after(pg->rexmit_timer.expires, lmi))
1783 mod_timer(&pg->rexmit_timer, lmi);
1784 }
1785
1786 if (pg->filter_mode == MCAST_EXCLUDE &&
1787 (!timer_pending(&pg->timer) ||
1788 time_after(pg->timer.expires, now + br_multicast_lmqt(br))))
1789 mod_timer(&pg->timer, now + br_multicast_lmqt(br));
1790}
1791
0436862e
NA		 1792/* State Msg type New state Actions
1793 * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
1794 * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
1795 * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
1796 */
1797static bool br_multicast_isinc_allow(struct net_bridge_port_group *pg,
1798 void *srcs, u32 nsrcs, size_t src_size)
1799{
085b53c8 1800 struct net_bridge *br = pg->key.port->br;
0436862e
NA		 1801 struct net_bridge_group_src *ent;
1802 unsigned long now = jiffies;
1803 bool changed = false;
1804 struct br_ip src_ip;
1805 u32 src_idx;
1806
1807 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 1808 src_ip.proto = pg->key.addr.proto;
0436862e 1809 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 1810 memcpy(&src_ip.src, srcs, src_size);
0436862e
NA		 1811 ent = br_multicast_find_group_src(pg, &src_ip);
1812 if (!ent) {
1813 ent = br_multicast_new_group_src(pg, &src_ip);
1814 if (ent)
1815 changed = true;
1816 }
1817
1818 if (ent)
b0812368 1819 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
0436862e
NA		 1820 srcs += src_size;
1821 }
1822
1823 return changed;
1824}
1825
e6231bca
NA		 1826/* State Msg type New state Actions
1827 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
1828 * Delete (A-B)
1829 * Group Timer=GMI
1830 */
1831static void __grp_src_isexc_incl(struct net_bridge_port_group *pg,
1832 void *srcs, u32 nsrcs, size_t src_size)
1833{
1834 struct net_bridge_group_src *ent;
1835 struct br_ip src_ip;
1836 u32 src_idx;
1837
1838 hlist_for_each_entry(ent, &pg->src_list, node)
1839 ent->flags |= BR_SGRP_F_DELETE;
1840
1841 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 1842 src_ip.proto = pg->key.addr.proto;
e6231bca 1843 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 1844 memcpy(&src_ip.src, srcs, src_size);
e6231bca
NA		 1845 ent = br_multicast_find_group_src(pg, &src_ip);
1846 if (ent)
1847 ent->flags &= ~BR_SGRP_F_DELETE;
1848 else
b0812368
NA		 1849 ent = br_multicast_new_group_src(pg, &src_ip);
1850 if (ent)
1851 br_multicast_fwd_src_handle(ent);
e6231bca
NA		 1852 srcs += src_size;
1853 }
1854
1855 __grp_src_delete_marked(pg);
1856}
1857
1858/* State Msg type New state Actions
1859 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
1860 * Delete (X-A)
1861 * Delete (Y-A)
1862 * Group Timer=GMI
1863 */
1864static bool __grp_src_isexc_excl(struct net_bridge_port_group *pg,
1865 void *srcs, u32 nsrcs, size_t src_size)
1866{
085b53c8 1867 struct net_bridge *br = pg->key.port->br;
e6231bca
NA		 1868 struct net_bridge_group_src *ent;
1869 unsigned long now = jiffies;
1870 bool changed = false;
1871 struct br_ip src_ip;
1872 u32 src_idx;
1873
1874 hlist_for_each_entry(ent, &pg->src_list, node)
1875 ent->flags |= BR_SGRP_F_DELETE;
1876
1877 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 1878 src_ip.proto = pg->key.addr.proto;
e6231bca 1879 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 1880 memcpy(&src_ip.src, srcs, src_size);
e6231bca
NA		 1881 ent = br_multicast_find_group_src(pg, &src_ip);
1882 if (ent) {
1883 ent->flags &= ~BR_SGRP_F_DELETE;
1884 } else {
1885 ent = br_multicast_new_group_src(pg, &src_ip);
1886 if (ent) {
b0812368
NA		 1887 __grp_src_mod_timer(ent,
1888 now + br_multicast_gmi(br));
e6231bca
NA		 1889 changed = true;
1890 }
1891 }
1892 srcs += src_size;
1893 }
1894
1895 if (__grp_src_delete_marked(pg))
1896 changed = true;
1897
1898 return changed;
1899}
1900
1901static bool br_multicast_isexc(struct net_bridge_port_group *pg,
1902 void *srcs, u32 nsrcs, size_t src_size)
1903{
085b53c8 1904 struct net_bridge *br = pg->key.port->br;
e6231bca
NA		 1905 bool changed = false;
1906
1907 switch (pg->filter_mode) {
1908 case MCAST_INCLUDE:
1909 __grp_src_isexc_incl(pg, srcs, nsrcs, src_size);
8266a049 1910 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
e6231bca
NA		 1911 changed = true;
1912 break;
1913 case MCAST_EXCLUDE:
1914 changed = __grp_src_isexc_excl(pg, srcs, nsrcs, src_size);
1915 break;
1916 }
1917
1918 pg->filter_mode = MCAST_EXCLUDE;
1919 mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
1920
1921 return changed;
1922}
1923
5bf1e00b
NA		 1924/* State Msg type New state Actions
1925 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
1926 * Send Q(G,A-B)
1927 */
1928static bool __grp_src_toin_incl(struct net_bridge_port_group *pg,
1929 void *srcs, u32 nsrcs, size_t src_size)
1930{
085b53c8 1931 struct net_bridge *br = pg->key.port->br;
5bf1e00b
NA		 1932 u32 src_idx, to_send = pg->src_ents;
1933 struct net_bridge_group_src *ent;
1934 unsigned long now = jiffies;
1935 bool changed = false;
1936 struct br_ip src_ip;
1937
1938 hlist_for_each_entry(ent, &pg->src_list, node)
1939 ent->flags |= BR_SGRP_F_SEND;
1940
1941 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 1942 src_ip.proto = pg->key.addr.proto;
5bf1e00b 1943 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 1944 memcpy(&src_ip.src, srcs, src_size);
5bf1e00b
NA		 1945 ent = br_multicast_find_group_src(pg, &src_ip);
1946 if (ent) {
1947 ent->flags &= ~BR_SGRP_F_SEND;
1948 to_send--;
1949 } else {
1950 ent = br_multicast_new_group_src(pg, &src_ip);
1951 if (ent)
1952 changed = true;
1953 }
1954 if (ent)
b0812368 1955 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
5bf1e00b
NA		 1956 srcs += src_size;
1957 }
1958
1959 if (to_send)
1960 __grp_src_query_marked_and_rexmit(pg);
1961
1962 return changed;
1963}
1964
1965/* State Msg type New state Actions
1966 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
1967 * Send Q(G,X-A)
1968 * Send Q(G)
1969 */
1970static bool __grp_src_toin_excl(struct net_bridge_port_group *pg,
1971 void *srcs, u32 nsrcs, size_t src_size)
1972{
085b53c8 1973 struct net_bridge *br = pg->key.port->br;
5bf1e00b
NA		 1974 u32 src_idx, to_send = pg->src_ents;
1975 struct net_bridge_group_src *ent;
1976 unsigned long now = jiffies;
1977 bool changed = false;
1978 struct br_ip src_ip;
1979
1980 hlist_for_each_entry(ent, &pg->src_list, node)
1981 if (timer_pending(&ent->timer))
1982 ent->flags |= BR_SGRP_F_SEND;
1983
1984 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 1985 src_ip.proto = pg->key.addr.proto;
5bf1e00b 1986 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 1987 memcpy(&src_ip.src, srcs, src_size);
5bf1e00b
NA		 1988 ent = br_multicast_find_group_src(pg, &src_ip);
1989 if (ent) {
1990 if (timer_pending(&ent->timer)) {
1991 ent->flags &= ~BR_SGRP_F_SEND;
1992 to_send--;
1993 }
1994 } else {
1995 ent = br_multicast_new_group_src(pg, &src_ip);
1996 if (ent)
1997 changed = true;
1998 }
1999 if (ent)
b0812368 2000 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
5bf1e00b
NA		 2001 srcs += src_size;
2002 }
2003
2004 if (to_send)
2005 __grp_src_query_marked_and_rexmit(pg);
2006
2007 __grp_send_query_and_rexmit(pg);
2008
2009 return changed;
2010}
2011
2012static bool br_multicast_toin(struct net_bridge_port_group *pg,
2013 void *srcs, u32 nsrcs, size_t src_size)
2014{
2015 bool changed = false;
2016
2017 switch (pg->filter_mode) {
2018 case MCAST_INCLUDE:
2019 changed = __grp_src_toin_incl(pg, srcs, nsrcs, src_size);
2020 break;
2021 case MCAST_EXCLUDE:
2022 changed = __grp_src_toin_excl(pg, srcs, nsrcs, src_size);
2023 break;
2024 }
2025
2026 return changed;
2027}
2028
2029/* State Msg type New state Actions
2030 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2031 * Delete (A-B)
2032 * Send Q(G,A*B)
2033 * Group Timer=GMI
2034 */
2035static void __grp_src_toex_incl(struct net_bridge_port_group *pg,
2036 void *srcs, u32 nsrcs, size_t src_size)
2037{
2038 struct net_bridge_group_src *ent;
2039 u32 src_idx, to_send = 0;
2040 struct br_ip src_ip;
2041
2042 hlist_for_each_entry(ent, &pg->src_list, node)
2043 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2044
2045 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2046 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2047 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 2048 memcpy(&src_ip.src, srcs, src_size);
5bf1e00b
NA		 2049 ent = br_multicast_find_group_src(pg, &src_ip);
2050 if (ent) {
2051 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2052 BR_SGRP_F_SEND;
2053 to_send++;
2054 } else {
b0812368 2055 ent = br_multicast_new_group_src(pg, &src_ip);
5bf1e00b 2056 }
b0812368
NA		 2057 if (ent)
2058 br_multicast_fwd_src_handle(ent);
5bf1e00b
NA		 2059 srcs += src_size;
2060 }
2061
2062 __grp_src_delete_marked(pg);
2063 if (to_send)
2064 __grp_src_query_marked_and_rexmit(pg);
2065}
2066
2067/* State Msg type New state Actions
2068 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2069 * Delete (X-A)
2070 * Delete (Y-A)
2071 * Send Q(G,A-Y)
2072 * Group Timer=GMI
2073 */
2074static bool __grp_src_toex_excl(struct net_bridge_port_group *pg,
2075 void *srcs, u32 nsrcs, size_t src_size)
2076{
2077 struct net_bridge_group_src *ent;
2078 u32 src_idx, to_send = 0;
2079 bool changed = false;
2080 struct br_ip src_ip;
2081
2082 hlist_for_each_entry(ent, &pg->src_list, node)
2083 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2084
2085 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2086 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2087 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 2088 memcpy(&src_ip.src, srcs, src_size);
5bf1e00b
NA		 2089 ent = br_multicast_find_group_src(pg, &src_ip);
2090 if (ent) {
2091 ent->flags &= ~BR_SGRP_F_DELETE;
2092 } else {
2093 ent = br_multicast_new_group_src(pg, &src_ip);
2094 if (ent) {
b0812368 2095 __grp_src_mod_timer(ent, pg->timer.expires);
5bf1e00b
NA		 2096 changed = true;
2097 }
2098 }
2099 if (ent && timer_pending(&ent->timer)) {
2100 ent->flags |= BR_SGRP_F_SEND;
2101 to_send++;
2102 }
2103 srcs += src_size;
2104 }
2105
2106 if (__grp_src_delete_marked(pg))
2107 changed = true;
2108 if (to_send)
2109 __grp_src_query_marked_and_rexmit(pg);
2110
2111 return changed;
2112}
2113
2114static bool br_multicast_toex(struct net_bridge_port_group *pg,
2115 void *srcs, u32 nsrcs, size_t src_size)
2116{
085b53c8 2117 struct net_bridge *br = pg->key.port->br;
5bf1e00b
NA		 2118 bool changed = false;
2119
2120 switch (pg->filter_mode) {
2121 case MCAST_INCLUDE:
2122 __grp_src_toex_incl(pg, srcs, nsrcs, src_size);
8266a049 2123 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
5bf1e00b
NA		 2124 changed = true;
2125 break;
2126 case MCAST_EXCLUDE:
d5bf31dd 2127 changed = __grp_src_toex_excl(pg, srcs, nsrcs, src_size);
5bf1e00b
NA		 2128 break;
2129 }
2130
2131 pg->filter_mode = MCAST_EXCLUDE;
2132 mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
2133
2134 return changed;
2135}
2136
109865fe
NA		 2137/* State Msg type New state Actions
2138 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2139 */
2140static void __grp_src_block_incl(struct net_bridge_port_group *pg,
2141 void *srcs, u32 nsrcs, size_t src_size)
2142{
2143 struct net_bridge_group_src *ent;
2144 u32 src_idx, to_send = 0;
2145 struct br_ip src_ip;
2146
2147 hlist_for_each_entry(ent, &pg->src_list, node)
2148 ent->flags &= ~BR_SGRP_F_SEND;
2149
2150 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2151 src_ip.proto = pg->key.addr.proto;
109865fe 2152 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 2153 memcpy(&src_ip.src, srcs, src_size);
109865fe
NA		 2154 ent = br_multicast_find_group_src(pg, &src_ip);
2155 if (ent) {
2156 ent->flags |= BR_SGRP_F_SEND;
2157 to_send++;
2158 }
2159 srcs += src_size;
2160 }
2161
2162 if (to_send)
2163 __grp_src_query_marked_and_rexmit(pg);
2164
2165 if (pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list))
085b53c8 2166 br_multicast_find_del_pg(pg->key.port->br, pg);
109865fe
NA		 2167}
2168
2169/* State Msg type New state Actions
2170 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2171 * Send Q(G,A-Y)
2172 */
2173static bool __grp_src_block_excl(struct net_bridge_port_group *pg,
2174 void *srcs, u32 nsrcs, size_t src_size)
2175{
2176 struct net_bridge_group_src *ent;
2177 u32 src_idx, to_send = 0;
2178 bool changed = false;
2179 struct br_ip src_ip;
2180
2181 hlist_for_each_entry(ent, &pg->src_list, node)
2182 ent->flags &= ~BR_SGRP_F_SEND;
2183
2184 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2185 src_ip.proto = pg->key.addr.proto;
109865fe 2186 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
deb96566 2187 memcpy(&src_ip.src, srcs, src_size);
109865fe
NA		 2188 ent = br_multicast_find_group_src(pg, &src_ip);
2189 if (!ent) {
2190 ent = br_multicast_new_group_src(pg, &src_ip);
2191 if (ent) {
b0812368 2192 __grp_src_mod_timer(ent, pg->timer.expires);
109865fe
NA		 2193 changed = true;
2194 }
2195 }
2196 if (ent && timer_pending(&ent->timer)) {
2197 ent->flags |= BR_SGRP_F_SEND;
2198 to_send++;
2199 }
2200 srcs += src_size;
2201 }
2202
2203 if (to_send)
2204 __grp_src_query_marked_and_rexmit(pg);
2205
2206 return changed;
2207}
2208
2209static bool br_multicast_block(struct net_bridge_port_group *pg,
2210 void *srcs, u32 nsrcs, size_t src_size)
2211{
2212 bool changed = false;
2213
2214 switch (pg->filter_mode) {
2215 case MCAST_INCLUDE:
2216 __grp_src_block_incl(pg, srcs, nsrcs, src_size);
2217 break;
2218 case MCAST_EXCLUDE:
2219 changed = __grp_src_block_excl(pg, srcs, nsrcs, src_size);
2220 break;
2221 }
2222
2223 return changed;
2224}
2225
0436862e
NA		 2226static struct net_bridge_port_group *
2227br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2228 struct net_bridge_port *p,
2229 const unsigned char *src)
2230{
071445c6 2231 struct net_bridge *br __maybe_unused = mp->br;
0436862e 2232 struct net_bridge_port_group *pg;
0436862e
NA		 2233
2234 for (pg = mlock_dereference(mp->ports, br);
2235 pg;
2236 pg = mlock_dereference(pg->next, br))
2237 if (br_port_group_equal(pg, p, src))
2238 return pg;
2239
2240 return NULL;
2241}
2242
8ef2a9a5
YH		 2243static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
2244 struct net_bridge_port *port,
06499098
VY		 2245 struct sk_buff *skb,
2246 u16 vid)
eb1d1641 2247{
0436862e
NA		 2248 bool igmpv2 = br->multicast_igmp_version == 2;
2249 struct net_bridge_mdb_entry *mdst;
2250 struct net_bridge_port_group *pg;
6db6f0ea 2251 const unsigned char *src;
eb1d1641
HX		 2252 struct igmpv3_report *ih;
2253 struct igmpv3_grec *grec;
0436862e
NA		 2254 int i, len, num, type;
2255 bool changed = false;
eb1d1641 2256 __be32 group;
0436862e 2257 int err = 0;
e57f6185 2258 u16 nsrcs;
eb1d1641 2259
eb1d1641
HX		 2260 ih = igmpv3_report_hdr(skb);
2261 num = ntohs(ih->ngrec);
c2d4fbd2 2262 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 2263
2264 for (i = 0; i < num; i++) {
2265 len += sizeof(*grec);
ba5ea614 2266 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2267 return -EINVAL;
2268
fd218cf9 2269 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 2270 group = grec->grec_mca;
2271 type = grec->grec_type;
e57f6185 2272 nsrcs = ntohs(grec->grec_nsrcs);
eb1d1641 2273
e57f6185 2274 len += nsrcs * 4;
ba5ea614 2275 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2276 return -EINVAL;
2277
eb1d1641
HX		 2278 switch (type) {
2279 case IGMPV3_MODE_IS_INCLUDE:
2280 case IGMPV3_MODE_IS_EXCLUDE:
2281 case IGMPV3_CHANGE_TO_INCLUDE:
2282 case IGMPV3_CHANGE_TO_EXCLUDE:
2283 case IGMPV3_ALLOW_NEW_SOURCES:
2284 case IGMPV3_BLOCK_OLD_SOURCES:
2285 break;
2286
2287 default:
2288 continue;
2289 }
2290
6db6f0ea 2291 src = eth_hdr(skb)->h_source;
0436862e
NA		 2292 if (nsrcs == 0 &&
2293 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2294 type == IGMPV3_MODE_IS_INCLUDE)) {
2295 if (!port || igmpv2) {
2296 br_ip4_multicast_leave_group(br, port, group, vid, src);
2297 continue;
2298 }
bc8c20ac 2299 } else {
6db6f0ea 2300 err = br_ip4_multicast_add_group(br, port, group, vid,
0436862e 2301 src, igmpv2);
bc8c20ac
SA		 2302 if (err)
2303 break;
2304 }
0436862e
NA		 2305
2306 if (!port || igmpv2)
2307 continue;
2308
2309 spin_lock_bh(&br->multicast_lock);
2310 mdst = br_mdb_ip4_get(br, group, vid);
2311 if (!mdst)
2312 goto unlock_continue;
2313 pg = br_multicast_find_port(mdst, port, src);
2314 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2315 goto unlock_continue;
2316 /* reload grec */
2317 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
2318 switch (type) {
2319 case IGMPV3_ALLOW_NEW_SOURCES:
2320 changed = br_multicast_isinc_allow(pg, grec->grec_src,
2321 nsrcs, sizeof(__be32));
2322 break;
e6231bca
NA		 2323 case IGMPV3_MODE_IS_INCLUDE:
2324 changed = br_multicast_isinc_allow(pg, grec->grec_src, nsrcs,
2325 sizeof(__be32));
2326 break;
2327 case IGMPV3_MODE_IS_EXCLUDE:
2328 changed = br_multicast_isexc(pg, grec->grec_src, nsrcs,
2329 sizeof(__be32));
2330 break;
5bf1e00b
NA		 2331 case IGMPV3_CHANGE_TO_INCLUDE:
2332 changed = br_multicast_toin(pg, grec->grec_src, nsrcs,
2333 sizeof(__be32));
2334 break;
2335 case IGMPV3_CHANGE_TO_EXCLUDE:
2336 changed = br_multicast_toex(pg, grec->grec_src, nsrcs,
2337 sizeof(__be32));
2338 break;
109865fe
NA		 2339 case IGMPV3_BLOCK_OLD_SOURCES:
2340 changed = br_multicast_block(pg, grec->grec_src, nsrcs,
2341 sizeof(__be32));
2342 break;
0436862e
NA		 2343 }
2344 if (changed)
2345 br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
2346unlock_continue:
2347 spin_unlock_bh(&br->multicast_lock);
eb1d1641
HX		 2348 }
2349
2350 return err;
2351}
2352
dfd56b8b 2353#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 2354static int br_ip6_multicast_mld2_report(struct net_bridge *br,
2355 struct net_bridge_port *port,
06499098
VY		 2356 struct sk_buff *skb,
2357 u16 vid)
08b202b6 2358{
0436862e
NA		 2359 bool mldv1 = br->multicast_mld_version == 1;
2360 struct net_bridge_mdb_entry *mdst;
2361 struct net_bridge_port_group *pg;
ba5ea614 2362 unsigned int nsrcs_offset;
6db6f0ea 2363 const unsigned char *src;
08b202b6
YH		 2364 struct icmp6hdr *icmp6h;
2365 struct mld2_grec *grec;
ba5ea614 2366 unsigned int grec_len;
0436862e
NA		 2367 bool changed = false;
2368 int i, len, num;
08b202b6
YH		 2369 int err = 0;
2370
ba5ea614 2371 if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
08b202b6
YH		 2372 return -EINVAL;
2373
2374 icmp6h = icmp6_hdr(skb);
2375 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
c2d4fbd2 2376 len = skb_transport_offset(skb) + sizeof(*icmp6h);
08b202b6
YH		 2377
2378 for (i = 0; i < num; i++) {
e57f6185
NA		 2379 __be16 *_nsrcs, __nsrcs;
2380 u16 nsrcs;
08b202b6 2381
ba5ea614
LL		 2382 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2383
2384 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
5fc6266a 2385 nsrcs_offset + sizeof(__nsrcs))
ba5ea614
LL		 2386 return -EINVAL;
2387
e57f6185
NA		 2388 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2389 sizeof(__nsrcs), &__nsrcs);
2390 if (!_nsrcs)
08b202b6
YH		 2391 return -EINVAL;
2392
e57f6185
NA		 2393 nsrcs = ntohs(*_nsrcs);
2394 grec_len = struct_size(grec, grec_src, nsrcs);
ba5ea614
LL		 2395
2396 if (!ipv6_mc_may_pull(skb, len + grec_len))
08b202b6
YH		 2397 return -EINVAL;
2398
2399 grec = (struct mld2_grec *)(skb->data + len);
ba5ea614 2400 len += grec_len;
08b202b6 2401
08b202b6
YH		 2402 switch (grec->grec_type) {
2403 case MLD2_MODE_IS_INCLUDE:
2404 case MLD2_MODE_IS_EXCLUDE:
2405 case MLD2_CHANGE_TO_INCLUDE:
2406 case MLD2_CHANGE_TO_EXCLUDE:
2407 case MLD2_ALLOW_NEW_SOURCES:
2408 case MLD2_BLOCK_OLD_SOURCES:
2409 break;
2410
2411 default:
2412 continue;
2413 }
2414
6db6f0ea 2415 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 2416 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2417 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
e57f6185 2418 nsrcs == 0) {
0436862e
NA		 2419 if (!port || mldv1) {
2420 br_ip6_multicast_leave_group(br, port,
2421 &grec->grec_mca,
2422 vid, src);
2423 continue;
2424 }
bc8c20ac
SA		 2425 } else {
2426 err = br_ip6_multicast_add_group(br, port,
6db6f0ea 2427 &grec->grec_mca, vid,
0436862e 2428 src, mldv1);
9264251e 2429 if (err)
bc8c20ac
SA		 2430 break;
2431 }
0436862e
NA		 2432
2433 if (!port || mldv1)
2434 continue;
2435
2436 spin_lock_bh(&br->multicast_lock);
2437 mdst = br_mdb_ip6_get(br, &grec->grec_mca, vid);
2438 if (!mdst)
2439 goto unlock_continue;
2440 pg = br_multicast_find_port(mdst, port, src);
2441 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2442 goto unlock_continue;
2443 switch (grec->grec_type) {
2444 case MLD2_ALLOW_NEW_SOURCES:
2445 changed = br_multicast_isinc_allow(pg, grec->grec_src,
2446 nsrcs,
2447 sizeof(struct in6_addr));
2448 break;
e6231bca
NA		 2449 case MLD2_MODE_IS_INCLUDE:
2450 changed = br_multicast_isinc_allow(pg, grec->grec_src, nsrcs,
2451 sizeof(struct in6_addr));
2452 break;
2453 case MLD2_MODE_IS_EXCLUDE:
2454 changed = br_multicast_isexc(pg, grec->grec_src, nsrcs,
2455 sizeof(struct in6_addr));
2456 break;
5bf1e00b
NA		 2457 case MLD2_CHANGE_TO_INCLUDE:
2458 changed = br_multicast_toin(pg, grec->grec_src, nsrcs,
2459 sizeof(struct in6_addr));
2460 break;
2461 case MLD2_CHANGE_TO_EXCLUDE:
2462 changed = br_multicast_toex(pg, grec->grec_src, nsrcs,
2463 sizeof(struct in6_addr));
2464 break;
109865fe
NA		 2465 case MLD2_BLOCK_OLD_SOURCES:
2466 changed = br_multicast_block(pg, grec->grec_src, nsrcs,
2467 sizeof(struct in6_addr));
2468 break;
0436862e
NA		 2469 }
2470 if (changed)
2471 br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
2472unlock_continue:
2473 spin_unlock_bh(&br->multicast_lock);
08b202b6
YH		 2474 }
2475
2476 return err;
2477}
2478#endif
2479
dc4eb53a 2480static bool br_ip4_multicast_select_querier(struct net_bridge *br,
2cd41431 2481 struct net_bridge_port *port,
dc4eb53a
LL		 2482 __be32 saddr)
2483{
2484 if (!timer_pending(&br->ip4_own_query.timer) &&
2485 !timer_pending(&br->ip4_other_query.timer))
2486 goto update;
2487
deb96566 2488 if (!br->ip4_querier.addr.src.ip4)
dc4eb53a
LL		 2489 goto update;
2490
deb96566 2491 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.src.ip4))
dc4eb53a
LL		 2492 goto update;
2493
2494 return false;
2495
2496update:
deb96566 2497 br->ip4_querier.addr.src.ip4 = saddr;
dc4eb53a 2498
2cd41431
LL		 2499 /* update protected by general multicast_lock by caller */
2500 rcu_assign_pointer(br->ip4_querier.port, port);
2501
dc4eb53a
LL		 2502 return true;
2503}
2504
2505#if IS_ENABLED(CONFIG_IPV6)
2506static bool br_ip6_multicast_select_querier(struct net_bridge *br,
2cd41431 2507 struct net_bridge_port *port,
dc4eb53a
LL		 2508 struct in6_addr *saddr)
2509{
2510 if (!timer_pending(&br->ip6_own_query.timer) &&
2511 !timer_pending(&br->ip6_other_query.timer))
2512 goto update;
2513
deb96566 2514 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.src.ip6) <= 0)
dc4eb53a
LL		 2515 goto update;
2516
2517 return false;
2518
2519update:
deb96566 2520 br->ip6_querier.addr.src.ip6 = *saddr;
dc4eb53a 2521
2cd41431
LL		 2522 /* update protected by general multicast_lock by caller */
2523 rcu_assign_pointer(br->ip6_querier.port, port);
2524
dc4eb53a
LL		 2525 return true;
2526}
2527#endif
2528
2529static bool br_multicast_select_querier(struct net_bridge *br,
2cd41431 2530 struct net_bridge_port *port,
dc4eb53a
LL		 2531 struct br_ip *saddr)
2532{
2533 switch (saddr->proto) {
2534 case htons(ETH_P_IP):
deb96566 2535 return br_ip4_multicast_select_querier(br, port, saddr->src.ip4);
dc4eb53a
LL		 2536#if IS_ENABLED(CONFIG_IPV6)
2537 case htons(ETH_P_IPV6):
deb96566 2538 return br_ip6_multicast_select_querier(br, port, &saddr->src.ip6);
dc4eb53a
LL		 2539#endif
2540 }
2541
2542 return false;
2543}
2544
cc0fdd80 2545static void
90010b36
LL		 2546br_multicast_update_query_timer(struct net_bridge *br,
2547 struct bridge_mcast_other_query *query,
2548 unsigned long max_delay)
b00589af 2549{
90010b36
LL		 2550 if (!timer_pending(&query->timer))
2551 query->delay_time = jiffies + max_delay;
b00589af 2552
90010b36 2553 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
b00589af
LL		 2554}
2555
6d549648
NF		 2556static void br_port_mc_router_state_change(struct net_bridge_port *p,
2557 bool is_mc_router)
2558{
2559 struct switchdev_attr attr = {
2560 .orig_dev = p->dev,
2561 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
2562 .flags = SWITCHDEV_F_DEFER,
2563 .u.mrouter = is_mc_router,
2564 };
2565
2566 switchdev_port_attr_set(p->dev, &attr);
2567}
2568
7e80c124 2569/*
7c77602f 2570 * Add port to router_list
7e80c124 2571 * list is maintained ordered by pointer value
2572 * and locked by br->multicast_lock and RCU
2573 */
0909e117
HX		 2574static void br_multicast_add_router(struct net_bridge *br,
2575 struct net_bridge_port *port)
2576{
dcdca2c4 2577 struct net_bridge_port *p;
b67bfe0d 2578 struct hlist_node *slot = NULL;
dcdca2c4 2579
1a040eac
NA		 2580 if (!hlist_unhashed(&port->rlist))
2581 return;
2582
b67bfe0d 2583 hlist_for_each_entry(p, &br->router_list, rlist) {
7e80c124 2584 if ((unsigned long) port >= (unsigned long) p)
2585 break;
b67bfe0d 2586 slot = &p->rlist;
dcdca2c4 2587 }
2588
7e80c124 2589 if (slot)
1d023284 2590 hlist_add_behind_rcu(&port->rlist, slot);
dcdca2c4 2591 else
2592 hlist_add_head_rcu(&port->rlist, &br->router_list);
949f1e39 2593 br_rtr_notify(br->dev, port, RTM_NEWMDB);
6d549648 2594 br_port_mc_router_state_change(port, true);
0909e117
HX		 2595}
2596
eb1d1641
HX		 2597static void br_multicast_mark_router(struct net_bridge *br,
2598 struct net_bridge_port *port)
2599{
2600 unsigned long now = jiffies;
eb1d1641
HX		 2601
2602 if (!port) {
77041420
YG		 2603 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
2604 if (!timer_pending(&br->multicast_router_timer))
2605 br_mc_router_state_change(br, true);
eb1d1641
HX		 2606 mod_timer(&br->multicast_router_timer,
2607 now + br->multicast_querier_interval);
77041420 2608 }
eb1d1641
HX		 2609 return;
2610 }
2611
a55d8246
NA		 2612 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
2613 port->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 2614 return;
2615
0909e117 2616 br_multicast_add_router(br, port);
eb1d1641 2617
eb1d1641
HX		 2618 mod_timer(&port->multicast_router_timer,
2619 now + br->multicast_querier_interval);
2620}
2621
2622static void br_multicast_query_received(struct net_bridge *br,
2623 struct net_bridge_port *port,
90010b36 2624 struct bridge_mcast_other_query *query,
dc4eb53a 2625 struct br_ip *saddr,
b00589af 2626 unsigned long max_delay)
eb1d1641 2627{
2cd41431 2628 if (!br_multicast_select_querier(br, port, saddr))
eb1d1641
HX		 2629 return;
2630
dc4eb53a 2631 br_multicast_update_query_timer(br, query, max_delay);
278e2148 2632 br_multicast_mark_router(br, port);
eb1d1641
HX		 2633}
2634
9c2e955c 2635static void br_ip4_multicast_query(struct net_bridge *br,
2636 struct net_bridge_port *port,
2637 struct sk_buff *skb,
2638 u16 vid)
eb1d1641 2639{
ba5ea614 2640 unsigned int transport_len = ip_transport_len(skb);
b71d1d42 2641 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 2642 struct igmphdr *ih = igmp_hdr(skb);
2643 struct net_bridge_mdb_entry *mp;
2644 struct igmpv3_query *ih3;
2645 struct net_bridge_port_group *p;
e8051688 2646 struct net_bridge_port_group __rcu **pp;
dc4eb53a 2647 struct br_ip saddr;
eb1d1641
HX		 2648 unsigned long max_delay;
2649 unsigned long now = jiffies;
2650 __be32 group;
2651
2652 spin_lock(&br->multicast_lock);
2653 if (!netif_running(br->dev) ||
2654 (port && port->state == BR_STATE_DISABLED))
2655 goto out;
2656
eb1d1641
HX		 2657 group = ih->group;
2658
ba5ea614 2659 if (transport_len == sizeof(*ih)) {
eb1d1641
HX		 2660 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
2661
2662 if (!max_delay) {
2663 max_delay = 10 * HZ;
2664 group = 0;
2665 }
ba5ea614 2666 } else if (transport_len >= sizeof(*ih3)) {
eb1d1641 2667 ih3 = igmpv3_query_hdr(skb);
23550b83
NA		 2668 if (ih3->nsrcs ||
2669 (br->multicast_igmp_version == 3 && group && ih3->suppress))
bec68ff1 2670 goto out;
eb1d1641 2671
0ba8c9ec
YH		 2672 max_delay = ih3->code ?
2673 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 2674 } else {
9ed973cc
LL		 2675 goto out;
2676 }
2677
dc4eb53a
LL		 2678 if (!group) {
2679 saddr.proto = htons(ETH_P_IP);
deb96566 2680 saddr.src.ip4 = iph->saddr;
b00589af 2681
dc4eb53a
LL		 2682 br_multicast_query_received(br, port, &br->ip4_other_query,
2683 &saddr, max_delay);
eb1d1641 2684 goto out;
dc4eb53a 2685 }
eb1d1641 2686
19e3a9c9 2687 mp = br_mdb_ip4_get(br, group, vid);
eb1d1641
HX		 2688 if (!mp)
2689 goto out;
2690
2691 max_delay *= br->multicast_last_member_count;
2692
ff0fd34e 2693 if (mp->host_joined &&
eb1d1641
HX		 2694 (timer_pending(&mp->timer) ?
2695 time_after(mp->timer.expires, now + max_delay) :
2696 try_to_del_timer_sync(&mp->timer) >= 0))
2697 mod_timer(&mp->timer, now + max_delay);
2698
e8051688
ED		 2699 for (pp = &mp->ports;
2700 (p = mlock_dereference(*pp, br)) != NULL;
2701 pp = &p->next) {
eb1d1641
HX		 2702 if (timer_pending(&p->timer) ?
2703 time_after(p->timer.expires, now + max_delay) :
23550b83
NA		 2704 try_to_del_timer_sync(&p->timer) >= 0 &&
2705 (br->multicast_igmp_version == 2 ||
2706 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 2707 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 2708 }
2709
2710out:
2711 spin_unlock(&br->multicast_lock);
eb1d1641
HX		 2712}
2713
dfd56b8b 2714#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 2715static int br_ip6_multicast_query(struct net_bridge *br,
2716 struct net_bridge_port *port,
06499098
VY		 2717 struct sk_buff *skb,
2718 u16 vid)
08b202b6 2719{
ba5ea614 2720 unsigned int transport_len = ipv6_transport_len(skb);
eca2a43b 2721 struct mld_msg *mld;
08b202b6
YH		 2722 struct net_bridge_mdb_entry *mp;
2723 struct mld2_query *mld2q;
e8051688
ED		 2724 struct net_bridge_port_group *p;
2725 struct net_bridge_port_group __rcu **pp;
dc4eb53a 2726 struct br_ip saddr;
08b202b6
YH		 2727 unsigned long max_delay;
2728 unsigned long now = jiffies;
856ce5d0 2729 unsigned int offset = skb_transport_offset(skb);
b71d1d42 2730 const struct in6_addr *group = NULL;
9ed973cc 2731 bool is_general_query;
08b202b6
YH		 2732 int err = 0;
2733
2734 spin_lock(&br->multicast_lock);
2735 if (!netif_running(br->dev) ||
2736 (port && port->state == BR_STATE_DISABLED))
2737 goto out;
2738
ba5ea614 2739 if (transport_len == sizeof(*mld)) {
856ce5d0 2740 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 2741 err = -EINVAL;
2742 goto out;
2743 }
2744 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 2745 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 2746 if (max_delay)
2747 group = &mld->mld_mca;
248ba8ec 2748 } else {
856ce5d0 2749 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 2750 err = -EINVAL;
2751 goto out;
2752 }
2753 mld2q = (struct mld2_query *)icmp6_hdr(skb);
2754 if (!mld2q->mld2q_nsrcs)
2755 group = &mld2q->mld2q_mca;
23550b83
NA		 2756 if (br->multicast_mld_version == 2 &&
2757 !ipv6_addr_any(&mld2q->mld2q_mca) &&
2758 mld2q->mld2q_suppress)
2759 goto out;
e3f5b170
DB		 2760
2761 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 2762 }
2763
9ed973cc
LL		 2764 is_general_query = group && ipv6_addr_any(group);
2765
dc4eb53a
LL		 2766 if (is_general_query) {
2767 saddr.proto = htons(ETH_P_IPV6);
deb96566 2768 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
b00589af 2769
dc4eb53a
LL		 2770 br_multicast_query_received(br, port, &br->ip6_other_query,
2771 &saddr, max_delay);
08b202b6 2772 goto out;
6c03ee8b
LL		 2773 } else if (!group) {
2774 goto out;
dc4eb53a 2775 }
08b202b6 2776
19e3a9c9 2777 mp = br_mdb_ip6_get(br, group, vid);
08b202b6
YH		 2778 if (!mp)
2779 goto out;
2780
2781 max_delay *= br->multicast_last_member_count;
ff0fd34e 2782 if (mp->host_joined &&
08b202b6
YH		 2783 (timer_pending(&mp->timer) ?
2784 time_after(mp->timer.expires, now + max_delay) :
2785 try_to_del_timer_sync(&mp->timer) >= 0))
2786 mod_timer(&mp->timer, now + max_delay);
2787
e8051688
ED		 2788 for (pp = &mp->ports;
2789 (p = mlock_dereference(*pp, br)) != NULL;
2790 pp = &p->next) {
08b202b6
YH		 2791 if (timer_pending(&p->timer) ?
2792 time_after(p->timer.expires, now + max_delay) :
23550b83
NA		 2793 try_to_del_timer_sync(&p->timer) >= 0 &&
2794 (br->multicast_mld_version == 1 ||
2795 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 2796 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 2797 }
2798
2799out:
2800 spin_unlock(&br->multicast_lock);
2801 return err;
2802}
2803#endif
2804
90010b36
LL		 2805static void
2806br_multicast_leave_group(struct net_bridge *br,
2807 struct net_bridge_port *port,
2808 struct br_ip *group,
2809 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 2810 struct bridge_mcast_own_query *own_query,
2811 const unsigned char *src)
eb1d1641 2812{
eb1d1641
HX		 2813 struct net_bridge_mdb_entry *mp;
2814 struct net_bridge_port_group *p;
2815 unsigned long now;
2816 unsigned long time;
2817
eb1d1641
HX		 2818 spin_lock(&br->multicast_lock);
2819 if (!netif_running(br->dev) ||
544586f7 2820 (port && port->state == BR_STATE_DISABLED))
eb1d1641
HX		 2821 goto out;
2822
19e3a9c9 2823 mp = br_mdb_ip_get(br, group);
eb1d1641
HX		 2824 if (!mp)
2825 goto out;
2826
544586f7
SA		 2827 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
2828 struct net_bridge_port_group __rcu **pp;
2829
2830 for (pp = &mp->ports;
2831 (p = mlock_dereference(*pp, br)) != NULL;
2832 pp = &p->next) {
6db6f0ea 2833 if (!br_port_group_equal(p, port, src))
544586f7
SA		 2834 continue;
2835
5c725b6b
NA		 2836 if (p->flags & MDB_PG_FLAGS_PERMANENT)
2837 break;
2838
681590bd
NA		 2839 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2840 br_multicast_del_pg(mp, p, pp);
544586f7
SA		 2841 }
2842 goto out;
2843 }
2844
2845 if (timer_pending(&other_query->timer))
2846 goto out;
2847
675779ad 2848 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
438ef2d0 2849 __br_multicast_send_query(br, port, NULL, NULL, &mp->addr,
42c11ccf 2850 false, 0, NULL);
6b7df111
CW		 2851
2852 time = jiffies + br->multicast_last_member_count *
2853 br->multicast_last_member_interval;
cc0fdd80 2854
90010b36 2855 mod_timer(&own_query->timer, time);
6b7df111
CW		 2856
2857 for (p = mlock_dereference(mp->ports, br);
2858 p != NULL;
2859 p = mlock_dereference(p->next, br)) {
6db6f0ea 2860 if (!br_port_group_equal(p, port, src))
6b7df111
CW		 2861 continue;
2862
2863 if (!hlist_unhashed(&p->mglist) &&
2864 (timer_pending(&p->timer) ?
2865 time_after(p->timer.expires, time) :
2866 try_to_del_timer_sync(&p->timer) >= 0)) {
2867 mod_timer(&p->timer, time);
2868 }
2869
2870 break;
2871 }
2872 }
2873
eb1d1641
HX		 2874 now = jiffies;
2875 time = now + br->multicast_last_member_count *
2876 br->multicast_last_member_interval;
2877
2878 if (!port) {
ff0fd34e 2879 if (mp->host_joined &&
eb1d1641
HX		 2880 (timer_pending(&mp->timer) ?
2881 time_after(mp->timer.expires, time) :
2882 try_to_del_timer_sync(&mp->timer) >= 0)) {
2883 mod_timer(&mp->timer, time);
eb1d1641 2884 }
454594f3
LL		 2885
2886 goto out;
2887 }
2888
2889 for (p = mlock_dereference(mp->ports, br);
2890 p != NULL;
2891 p = mlock_dereference(p->next, br)) {
085b53c8 2892 if (p->key.port != port)
454594f3
LL		 2893 continue;
2894
2895 if (!hlist_unhashed(&p->mglist) &&
2896 (timer_pending(&p->timer) ?
2897 time_after(p->timer.expires, time) :
2898 try_to_del_timer_sync(&p->timer) >= 0)) {
2899 mod_timer(&p->timer, time);
2900 }
2901
2902 break;
eb1d1641 2903 }
eb1d1641
HX		 2904out:
2905 spin_unlock(&br->multicast_lock);
2906}
2907
8ef2a9a5
YH		 2908static void br_ip4_multicast_leave_group(struct net_bridge *br,
2909 struct net_bridge_port *port,
b0e9a30d 2910 __be32 group,
6db6f0ea
FF		 2911 __u16 vid,
2912 const unsigned char *src)
8ef2a9a5
YH		 2913{
2914 struct br_ip br_group;
90010b36 2915 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 2916
2917 if (ipv4_is_local_multicast(group))
2918 return;
2919
90010b36
LL		 2920 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
2921
1515a63f 2922 memset(&br_group, 0, sizeof(br_group));
eab3227b 2923 br_group.dst.ip4 = group;
8ef2a9a5 2924 br_group.proto = htons(ETH_P_IP);
b0e9a30d 2925 br_group.vid = vid;
8ef2a9a5 2926
90010b36 2927 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
6db6f0ea 2928 own_query, src);
8ef2a9a5
YH		 2929}
2930
dfd56b8b 2931#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 2932static void br_ip6_multicast_leave_group(struct net_bridge *br,
2933 struct net_bridge_port *port,
b0e9a30d 2934 const struct in6_addr *group,
6db6f0ea
FF		 2935 __u16 vid,
2936 const unsigned char *src)
08b202b6
YH		 2937{
2938 struct br_ip br_group;
90010b36 2939 struct bridge_mcast_own_query *own_query;
08b202b6 2940
3c3769e6 2941 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 2942 return;
2943
90010b36
LL		 2944 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
2945
1515a63f 2946 memset(&br_group, 0, sizeof(br_group));
eab3227b 2947 br_group.dst.ip6 = *group;
08b202b6 2948 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 2949 br_group.vid = vid;
08b202b6 2950
90010b36 2951 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
6db6f0ea 2952 own_query, src);
08b202b6
YH		 2953}
2954#endif
8ef2a9a5 2955
1080ab95
NA		 2956static void br_multicast_err_count(const struct net_bridge *br,
2957 const struct net_bridge_port *p,
2958 __be16 proto)
2959{
2960 struct bridge_mcast_stats __percpu *stats;
2961 struct bridge_mcast_stats *pstats;
2962
675779ad 2963 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 2964 return;
2965
2966 if (p)
2967 stats = p->mcast_stats;
2968 else
2969 stats = br->mcast_stats;
2970 if (WARN_ON(!stats))
2971 return;
2972
2973 pstats = this_cpu_ptr(stats);
2974
2975 u64_stats_update_begin(&pstats->syncp);
2976 switch (proto) {
2977 case htons(ETH_P_IP):
2978 pstats->mstats.igmp_parse_errors++;
2979 break;
2980#if IS_ENABLED(CONFIG_IPV6)
2981 case htons(ETH_P_IPV6):
2982 pstats->mstats.mld_parse_errors++;
2983 break;
2984#endif
2985 }
2986 u64_stats_update_end(&pstats->syncp);
2987}
2988
91b02d3d
NA		 2989static void br_multicast_pim(struct net_bridge *br,
2990 struct net_bridge_port *port,
2991 const struct sk_buff *skb)
2992{
2993 unsigned int offset = skb_transport_offset(skb);
2994 struct pimhdr *pimhdr, _pimhdr;
2995
2996 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
2997 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
2998 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
2999 return;
3000
3001 br_multicast_mark_router(br, port);
3002}
3003
4b3087c7
LL		 3004static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
3005 struct net_bridge_port *port,
3006 struct sk_buff *skb)
3007{
3008 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3009 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3010 return -ENOMSG;
3011
3012 br_multicast_mark_router(br, port);
3013
3014 return 0;
3015}
3016
eb1d1641
HX		 3017static int br_multicast_ipv4_rcv(struct net_bridge *br,
3018 struct net_bridge_port *port,
06499098
VY		 3019 struct sk_buff *skb,
3020 u16 vid)
eb1d1641 3021{
6db6f0ea 3022 const unsigned char *src;
eb1d1641 3023 struct igmphdr *ih;
eb1d1641
HX		 3024 int err;
3025
ba5ea614 3026 err = ip_mc_check_igmp(skb);
eb1d1641 3027
9afd85c9 3028 if (err == -ENOMSG) {
91b02d3d 3029 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 3030 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 3031 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3032 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
3033 br_multicast_pim(br, port, skb);
4b3087c7 3034 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
08e71623 3035 br_ip4_multicast_mrd_rcv(br, port, skb);
91b02d3d 3036 }
4b3087c7 3037
eb1d1641 3038 return 0;
9afd85c9 3039 } else if (err < 0) {
1080ab95 3040 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 3041 return err;
bd4265fe 3042 }
eb1d1641 3043
9afd85c9 3044 ih = igmp_hdr(skb);
6db6f0ea 3045 src = eth_hdr(skb)->h_source;
1080ab95 3046 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
eb1d1641
HX		 3047
3048 switch (ih->type) {
3049 case IGMP_HOST_MEMBERSHIP_REPORT:
3050 case IGMPV2_HOST_MEMBERSHIP_REPORT:
62b2bcb4 3051 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
8b671779
NA		 3052 err = br_ip4_multicast_add_group(br, port, ih->group, vid, src,
3053 true);
eb1d1641
HX		 3054 break;
3055 case IGMPV3_HOST_MEMBERSHIP_REPORT:
ba5ea614 3056 err = br_ip4_multicast_igmp3_report(br, port, skb, vid);
eb1d1641
HX		 3057 break;
3058 case IGMP_HOST_MEMBERSHIP_QUERY:
ba5ea614 3059 br_ip4_multicast_query(br, port, skb, vid);
eb1d1641
HX		 3060 break;
3061 case IGMP_HOST_LEAVE_MESSAGE:
6db6f0ea 3062 br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
eb1d1641
HX		 3063 break;
3064 }
3065
a65056ec 3066 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3067 BR_MCAST_DIR_RX);
3068
eb1d1641
HX		 3069 return err;
3070}
3071
dfd56b8b 3072#if IS_ENABLED(CONFIG_IPV6)
4b3087c7
LL		 3073static int br_ip6_multicast_mrd_rcv(struct net_bridge *br,
3074 struct net_bridge_port *port,
3075 struct sk_buff *skb)
3076{
3077 int ret;
3078
3079 if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
3080 return -ENOMSG;
3081
3082 ret = ipv6_mc_check_icmpv6(skb);
3083 if (ret < 0)
3084 return ret;
3085
3086 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
3087 return -ENOMSG;
3088
3089 br_multicast_mark_router(br, port);
3090
3091 return 0;
3092}
3093
08b202b6
YH		 3094static int br_multicast_ipv6_rcv(struct net_bridge *br,
3095 struct net_bridge_port *port,
06499098
VY		 3096 struct sk_buff *skb,
3097 u16 vid)
08b202b6 3098{
6db6f0ea 3099 const unsigned char *src;
9afd85c9 3100 struct mld_msg *mld;
08b202b6
YH		 3101 int err;
3102
ba5ea614 3103 err = ipv6_mc_check_mld(skb);
08b202b6 3104
9afd85c9
LL		 3105 if (err == -ENOMSG) {
3106 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3107 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
4b3087c7
LL		 3108
3109 if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) {
3110 err = br_ip6_multicast_mrd_rcv(br, port, skb);
3111
3112 if (err < 0 && err != -ENOMSG) {
3113 br_multicast_err_count(br, port, skb->protocol);
3114 return err;
3115 }
3116 }
3117
08b202b6 3118 return 0;
9afd85c9 3119 } else if (err < 0) {
1080ab95 3120 br_multicast_err_count(br, port, skb->protocol);
9afd85c9 3121 return err;
08b202b6
YH		 3122 }
3123
9afd85c9 3124 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 3125 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 3126
9afd85c9 3127 switch (mld->mld_type) {
08b202b6 3128 case ICMPV6_MGM_REPORT:
6db6f0ea 3129 src = eth_hdr(skb)->h_source;
fc2af6c7 3130 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
6db6f0ea 3131 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
8b671779 3132 src, true);
08b202b6 3133 break;
08b202b6 3134 case ICMPV6_MLD2_REPORT:
ba5ea614 3135 err = br_ip6_multicast_mld2_report(br, port, skb, vid);
08b202b6
YH		 3136 break;
3137 case ICMPV6_MGM_QUERY:
ba5ea614 3138 err = br_ip6_multicast_query(br, port, skb, vid);
08b202b6
YH		 3139 break;
3140 case ICMPV6_MGM_REDUCTION:
6db6f0ea
FF		 3141 src = eth_hdr(skb)->h_source;
3142 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
9afd85c9 3143 break;
08b202b6
YH		 3144 }
3145
a65056ec 3146 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3147 BR_MCAST_DIR_RX);
3148
08b202b6
YH		 3149 return err;
3150}
3151#endif
3152
eb1d1641 3153int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
06499098 3154 struct sk_buff *skb, u16 vid)
eb1d1641 3155{
1080ab95
NA		 3156 int ret = 0;
3157
1fafc7a9
YH		 3158 BR_INPUT_SKB_CB(skb)->igmp = 0;
3159 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3160
13cefad2 3161 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 3162 return 0;
3163
3164 switch (skb->protocol) {
3165 case htons(ETH_P_IP):
1080ab95
NA		 3166 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
3167 break;
dfd56b8b 3168#if IS_ENABLED(CONFIG_IPV6)
08b202b6 3169 case htons(ETH_P_IPV6):
1080ab95
NA		 3170 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
3171 break;
08b202b6 3172#endif
eb1d1641
HX		 3173 }
3174
1080ab95 3175 return ret;
eb1d1641
HX		 3176}
3177
cc0fdd80 3178static void br_multicast_query_expired(struct net_bridge *br,
2cd41431
LL		 3179 struct bridge_mcast_own_query *query,
3180 struct bridge_mcast_querier *querier)
cc0fdd80
LL		 3181{
3182 spin_lock(&br->multicast_lock);
3183 if (query->startup_sent < br->multicast_startup_query_count)
3184 query->startup_sent++;
3185
71d9f614 3186 RCU_INIT_POINTER(querier->port, NULL);
cc0fdd80
LL		 3187 br_multicast_send_query(br, NULL, query);
3188 spin_unlock(&br->multicast_lock);
3189}
3190
88c1f37f 3191static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 3192{
88c1f37f 3193 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
eb1d1641 3194
2cd41431 3195 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
cc0fdd80 3196}
eb1d1641 3197
cc0fdd80 3198#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 3199static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 3200{
88c1f37f 3201 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
eb1d1641 3202
2cd41431 3203 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
eb1d1641 3204}
cc0fdd80 3205#endif
eb1d1641 3206
e12cec65 3207static void br_multicast_gc_work(struct work_struct *work)
8b671779
NA		 3208{
3209 struct net_bridge *br = container_of(work, struct net_bridge,
e12cec65 3210 mcast_gc_work);
8b671779
NA		 3211 HLIST_HEAD(deleted_head);
3212
3213 spin_lock_bh(&br->multicast_lock);
e12cec65 3214 hlist_move_list(&br->mcast_gc_list, &deleted_head);
8b671779
NA		 3215 spin_unlock_bh(&br->multicast_lock);
3216
e12cec65 3217 br_multicast_gc(&deleted_head);
8b671779
NA		 3218}
3219
eb1d1641
HX		 3220void br_multicast_init(struct net_bridge *br)
3221{
d08c6bc0 3222 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
eb1d1641 3223
7f0aec7a 3224 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
eb1d1641
HX		 3225 br->multicast_last_member_count = 2;
3226 br->multicast_startup_query_count = 2;
3227
3228 br->multicast_last_member_interval = HZ;
3229 br->multicast_query_response_interval = 10 * HZ;
3230 br->multicast_startup_query_interval = 125 * HZ / 4;
3231 br->multicast_query_interval = 125 * HZ;
3232 br->multicast_querier_interval = 255 * HZ;
3233 br->multicast_membership_interval = 260 * HZ;
3234
90010b36 3235 br->ip4_other_query.delay_time = 0;
2cd41431 3236 br->ip4_querier.port = NULL;
aa2ae3e7 3237 br->multicast_igmp_version = 2;
cc0fdd80 3238#if IS_ENABLED(CONFIG_IPV6)
aa2ae3e7 3239 br->multicast_mld_version = 1;
90010b36 3240 br->ip6_other_query.delay_time = 0;
2cd41431 3241 br->ip6_querier.port = NULL;
cc0fdd80 3242#endif
6919622a 3243 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
675779ad 3244 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
b00589af 3245
eb1d1641 3246 spin_lock_init(&br->multicast_lock);
88c1f37f
AP		 3247 timer_setup(&br->multicast_router_timer,
3248 br_multicast_local_router_expired, 0);
3249 timer_setup(&br->ip4_other_query.timer,
3250 br_ip4_multicast_querier_expired, 0);
3251 timer_setup(&br->ip4_own_query.timer,
3252 br_ip4_multicast_query_expired, 0);
cc0fdd80 3253#if IS_ENABLED(CONFIG_IPV6)
88c1f37f
AP		 3254 timer_setup(&br->ip6_other_query.timer,
3255 br_ip6_multicast_querier_expired, 0);
3256 timer_setup(&br->ip6_own_query.timer,
3257 br_ip6_multicast_query_expired, 0);
cc0fdd80 3258#endif
19e3a9c9 3259 INIT_HLIST_HEAD(&br->mdb_list);
e12cec65
NA		 3260 INIT_HLIST_HEAD(&br->mcast_gc_list);
3261 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
eb1d1641
HX		 3262}
3263
4effd28c
LL		 3264static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
3265{
3266 struct in_device *in_dev = in_dev_get(br->dev);
3267
3268 if (!in_dev)
3269 return;
3270
9fb20801 3271 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 3272 in_dev_put(in_dev);
3273}
3274
3275#if IS_ENABLED(CONFIG_IPV6)
3276static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3277{
3278 struct in6_addr addr;
3279
3280 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3281 ipv6_dev_mc_inc(br->dev, &addr);
3282}
3283#else
3284static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3285{
3286}
3287#endif
3288
3289static void br_multicast_join_snoopers(struct net_bridge *br)
3290{
3291 br_ip4_multicast_join_snoopers(br);
3292 br_ip6_multicast_join_snoopers(br);
3293}
3294
3295static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
3296{
3297 struct in_device *in_dev = in_dev_get(br->dev);
3298
3299 if (WARN_ON(!in_dev))
3300 return;
3301
9fb20801 3302 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 3303 in_dev_put(in_dev);
3304}
3305
3306#if IS_ENABLED(CONFIG_IPV6)
3307static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3308{
3309 struct in6_addr addr;
3310
3311 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3312 ipv6_dev_mc_dec(br->dev, &addr);
3313}
3314#else
3315static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3316{
3317}
3318#endif
3319
3320static void br_multicast_leave_snoopers(struct net_bridge *br)
3321{
3322 br_ip4_multicast_leave_snoopers(br);
3323 br_ip6_multicast_leave_snoopers(br);
3324}
3325
cc0fdd80 3326static void __br_multicast_open(struct net_bridge *br,
90010b36 3327 struct bridge_mcast_own_query *query)
eb1d1641 3328{
cc0fdd80 3329 query->startup_sent = 0;
eb1d1641 3330
13cefad2 3331 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 3332 return;
3333
cc0fdd80
LL		 3334 mod_timer(&query->timer, jiffies);
3335}
3336
3337void br_multicast_open(struct net_bridge *br)
3338{
4effd28c
LL		 3339 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
3340 br_multicast_join_snoopers(br);
3341
90010b36 3342 __br_multicast_open(br, &br->ip4_own_query);
cc0fdd80 3343#if IS_ENABLED(CONFIG_IPV6)
90010b36 3344 __br_multicast_open(br, &br->ip6_own_query);
cc0fdd80 3345#endif
eb1d1641
HX		 3346}
3347
3348void br_multicast_stop(struct net_bridge *br)
3349{
eb1d1641 3350 del_timer_sync(&br->multicast_router_timer);
90010b36
LL		 3351 del_timer_sync(&br->ip4_other_query.timer);
3352 del_timer_sync(&br->ip4_own_query.timer);
cc0fdd80 3353#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 3354 del_timer_sync(&br->ip6_other_query.timer);
3355 del_timer_sync(&br->ip6_own_query.timer);
cc0fdd80 3356#endif
4effd28c
LL		 3357
3358 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
3359 br_multicast_leave_snoopers(br);
e10177ab
SA		 3360}
3361
3362void br_multicast_dev_del(struct net_bridge *br)
3363{
e10177ab 3364 struct net_bridge_mdb_entry *mp;
8b671779 3365 HLIST_HEAD(deleted_head);
19e3a9c9 3366 struct hlist_node *tmp;
eb1d1641
HX		 3367
3368 spin_lock_bh(&br->multicast_lock);
e12cec65
NA		 3369 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
3370 br_multicast_del_mdb_entry(mp);
3371 hlist_move_list(&br->mcast_gc_list, &deleted_head);
eb1d1641 3372 spin_unlock_bh(&br->multicast_lock);
19e3a9c9 3373
e12cec65
NA		 3374 br_multicast_gc(&deleted_head);
3375 cancel_work_sync(&br->mcast_gc_work);
8b671779 3376
4329596c 3377 rcu_barrier();
eb1d1641 3378}
0909e117
HX		 3379
3380int br_multicast_set_router(struct net_bridge *br, unsigned long val)
3381{
6ae4ae8e 3382 int err = -EINVAL;
0909e117
HX		 3383
3384 spin_lock_bh(&br->multicast_lock);
0909e117
HX		 3385
3386 switch (val) {
7f0aec7a
NA		 3387 case MDB_RTR_TYPE_DISABLED:
3388 case MDB_RTR_TYPE_PERM:
77041420 3389 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
0909e117 3390 del_timer(&br->multicast_router_timer);
77041420
YG		 3391 br->multicast_router = val;
3392 err = 0;
3393 break;
7f0aec7a 3394 case MDB_RTR_TYPE_TEMP_QUERY:
77041420
YG		 3395 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
3396 br_mc_router_state_change(br, false);
0909e117
HX		 3397 br->multicast_router = val;
3398 err = 0;
3399 break;
0909e117
HX		 3400 }
3401
0909e117
HX		 3402 spin_unlock_bh(&br->multicast_lock);
3403
3404 return err;
3405}
3406
7f0aec7a
NA		 3407static void __del_port_router(struct net_bridge_port *p)
3408{
3409 if (hlist_unhashed(&p->rlist))
3410 return;
3411 hlist_del_init_rcu(&p->rlist);
3412 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
6d549648 3413 br_port_mc_router_state_change(p, false);
f12e7d95
NF		 3414
3415 /* don't allow timer refresh */
3416 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
3417 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 3418}
3419
0909e117
HX		 3420int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
3421{
3422 struct net_bridge *br = p->br;
a55d8246 3423 unsigned long now = jiffies;
6ae4ae8e 3424 int err = -EINVAL;
0909e117
HX		 3425
3426 spin_lock(&br->multicast_lock);
4950cfd1 3427 if (p->multicast_router == val) {
a55d8246
NA		 3428 /* Refresh the temp router port timer */
3429 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
3430 mod_timer(&p->multicast_router_timer,
3431 now + br->multicast_querier_interval);
4950cfd1
NA		 3432 err = 0;
3433 goto unlock;
3434 }
0909e117 3435 switch (val) {
7f0aec7a
NA		 3436 case MDB_RTR_TYPE_DISABLED:
3437 p->multicast_router = MDB_RTR_TYPE_DISABLED;
3438 __del_port_router(p);
3439 del_timer(&p->multicast_router_timer);
3440 break;
3441 case MDB_RTR_TYPE_TEMP_QUERY:
3442 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3443 __del_port_router(p);
3444 break;
3445 case MDB_RTR_TYPE_PERM:
3446 p->multicast_router = MDB_RTR_TYPE_PERM;
0909e117 3447 del_timer(&p->multicast_router_timer);
0909e117
HX		 3448 br_multicast_add_router(br, p);
3449 break;
a55d8246
NA		 3450 case MDB_RTR_TYPE_TEMP:
3451 p->multicast_router = MDB_RTR_TYPE_TEMP;
3452 br_multicast_mark_router(br, p);
3453 break;
7f0aec7a
NA		 3454 default:
3455 goto unlock;
0909e117 3456 }
7f0aec7a
NA		 3457 err = 0;
3458unlock:
0909e117
HX		 3459 spin_unlock(&br->multicast_lock);
3460
3461 return err;
3462}
561f1103 3463
cc0fdd80 3464static void br_multicast_start_querier(struct net_bridge *br,
90010b36 3465 struct bridge_mcast_own_query *query)
561f1103
HX		 3466{
3467 struct net_bridge_port *port;
74857216 3468
cc0fdd80 3469 __br_multicast_open(br, query);
74857216 3470
c5b493ce
NA		 3471 rcu_read_lock();
3472 list_for_each_entry_rcu(port, &br->port_list, list) {
74857216
HX		 3473 if (port->state == BR_STATE_DISABLED ||
3474 port->state == BR_STATE_BLOCKING)
3475 continue;
3476
90010b36
LL		 3477 if (query == &br->ip4_own_query)
3478 br_multicast_enable(&port->ip4_own_query);
cc0fdd80
LL		 3479#if IS_ENABLED(CONFIG_IPV6)
3480 else
90010b36 3481 br_multicast_enable(&port->ip6_own_query);
cc0fdd80 3482#endif
74857216 3483 }
c5b493ce 3484 rcu_read_unlock();
74857216
HX		 3485}
3486
3487int br_multicast_toggle(struct net_bridge *br, unsigned long val)
3488{
7cb3f921 3489 struct net_bridge_port *port;
561f1103 3490
ef5e0d82 3491 spin_lock_bh(&br->multicast_lock);
13cefad2 3492 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 3493 goto unlock;
3494
13cefad2
NA		 3495 br_mc_disabled_update(br->dev, val);
3496 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4effd28c
LL		 3497 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
3498 br_multicast_leave_snoopers(br);
561f1103 3499 goto unlock;
4effd28c 3500 }
561f1103 3501
3a7fda06
HX		 3502 if (!netif_running(br->dev))
3503 goto unlock;
3504
7cb3f921
NA		 3505 br_multicast_open(br);
3506 list_for_each_entry(port, &br->port_list, list)
3507 __br_multicast_enable_port(port);
561f1103
HX		 3508
3509unlock:
ef5e0d82 3510 spin_unlock_bh(&br->multicast_lock);
561f1103 3511
a26d94bf 3512 return 0;
561f1103 3513}
b195167f 3514
9341b988
IS		 3515bool br_multicast_enabled(const struct net_device *dev)
3516{
3517 struct net_bridge *br = netdev_priv(dev);
3518
13cefad2 3519 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 3520}
3521EXPORT_SYMBOL_GPL(br_multicast_enabled);
3522
0912bda4
YG		 3523bool br_multicast_router(const struct net_device *dev)
3524{
3525 struct net_bridge *br = netdev_priv(dev);
3526 bool is_router;
3527
3528 spin_lock_bh(&br->multicast_lock);
3529 is_router = br_multicast_is_router(br);
3530 spin_unlock_bh(&br->multicast_lock);
3531 return is_router;
3532}
3533EXPORT_SYMBOL_GPL(br_multicast_router);
3534
c5c23260
HX		 3535int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
3536{
b00589af
LL		 3537 unsigned long max_delay;
3538
c5c23260
HX		 3539 val = !!val;
3540
3541 spin_lock_bh(&br->multicast_lock);
675779ad 3542 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
c5c23260
HX		 3543 goto unlock;
3544
675779ad 3545 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
b00589af
LL		 3546 if (!val)
3547 goto unlock;
3548
3549 max_delay = br->multicast_query_response_interval;
b00589af 3550
90010b36
LL		 3551 if (!timer_pending(&br->ip4_other_query.timer))
3552 br->ip4_other_query.delay_time = jiffies + max_delay;
cc0fdd80 3553
90010b36 3554 br_multicast_start_querier(br, &br->ip4_own_query);
cc0fdd80
LL		 3555
3556#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL		 3557 if (!timer_pending(&br->ip6_other_query.timer))
3558 br->ip6_other_query.delay_time = jiffies + max_delay;
cc0fdd80 3559
90010b36 3560 br_multicast_start_querier(br, &br->ip6_own_query);
cc0fdd80 3561#endif
c5c23260
HX		 3562
3563unlock:
3564 spin_unlock_bh(&br->multicast_lock);
3565
3566 return 0;
3567}
3568
5e923585
NA		 3569int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
3570{
3571 /* Currently we support only version 2 and 3 */
3572 switch (val) {
3573 case 2:
3574 case 3:
3575 break;
3576 default:
3577 return -EINVAL;
3578 }
3579
3580 spin_lock_bh(&br->multicast_lock);
3581 br->multicast_igmp_version = val;
3582 spin_unlock_bh(&br->multicast_lock);
3583
3584 return 0;
3585}
3586
aa2ae3e7
NA		 3587#if IS_ENABLED(CONFIG_IPV6)
3588int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
3589{
3590 /* Currently we support version 1 and 2 */
3591 switch (val) {
3592 case 1:
3593 case 2:
3594 break;
3595 default:
3596 return -EINVAL;
3597 }
3598
3599 spin_lock_bh(&br->multicast_lock);
3600 br->multicast_mld_version = val;
3601 spin_unlock_bh(&br->multicast_lock);
3602
3603 return 0;
3604}
3605#endif
3606
07f8ac4a
LL		 3607/**
3608 * br_multicast_list_adjacent - Returns snooped multicast addresses
3609 * @dev: The bridge port adjacent to which to retrieve addresses
3610 * @br_ip_list: The list to store found, snooped multicast IP addresses in
3611 *
3612 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
3613 * snooping feature on all bridge ports of dev's bridge device, excluding
3614 * the addresses from dev itself.
3615 *
3616 * Returns the number of items added to br_ip_list.
3617 *
3618 * Notes:
3619 * - br_ip_list needs to be initialized by caller
3620 * - br_ip_list might contain duplicates in the end
3621 * (needs to be taken care of by caller)
3622 * - br_ip_list needs to be freed by caller
3623 */
3624int br_multicast_list_adjacent(struct net_device *dev,
3625 struct list_head *br_ip_list)
3626{
3627 struct net_bridge *br;
3628 struct net_bridge_port *port;
3629 struct net_bridge_port_group *group;
3630 struct br_ip_list *entry;
3631 int count = 0;
3632
3633 rcu_read_lock();
35f861e3 3634 if (!br_ip_list || !netif_is_bridge_port(dev))
07f8ac4a
LL		 3635 goto unlock;
3636
3637 port = br_port_get_rcu(dev);
3638 if (!port || !port->br)
3639 goto unlock;
3640
3641 br = port->br;
3642
3643 list_for_each_entry_rcu(port, &br->port_list, list) {
3644 if (!port->dev || port->dev == dev)
3645 continue;
3646
3647 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
3648 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3649 if (!entry)
3650 goto unlock;
3651
085b53c8 3652 entry->addr = group->key.addr;
07f8ac4a
LL		 3653 list_add(&entry->list, br_ip_list);
3654 count++;
3655 }
3656 }
3657
3658unlock:
3659 rcu_read_unlock();
3660 return count;
3661}
3662EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2cd41431 3663
c34963e2
LL		 3664/**
3665 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
3666 * @dev: The bridge port providing the bridge on which to check for a querier
3667 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
3668 *
3669 * Checks whether the given interface has a bridge on top and if so returns
3670 * true if a valid querier exists anywhere on the bridged link layer.
3671 * Otherwise returns false.
3672 */
3673bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
3674{
3675 struct net_bridge *br;
3676 struct net_bridge_port *port;
3677 struct ethhdr eth;
3678 bool ret = false;
3679
3680 rcu_read_lock();
35f861e3 3681 if (!netif_is_bridge_port(dev))
c34963e2
LL		 3682 goto unlock;
3683
3684 port = br_port_get_rcu(dev);
3685 if (!port || !port->br)
3686 goto unlock;
3687
3688 br = port->br;
3689
3690 memset(&eth, 0, sizeof(eth));
3691 eth.h_proto = htons(proto);
3692
3693 ret = br_multicast_querier_exists(br, &eth);
3694
3695unlock:
3696 rcu_read_unlock();
3697 return ret;
3698}
3699EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
3700
2cd41431
LL		 3701/**
3702 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
3703 * @dev: The bridge port adjacent to which to check for a querier
3704 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
3705 *
3706 * Checks whether the given interface has a bridge on top and if so returns
3707 * true if a selected querier is behind one of the other ports of this
3708 * bridge. Otherwise returns false.
3709 */
3710bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
3711{
3712 struct net_bridge *br;
3713 struct net_bridge_port *port;
3714 bool ret = false;
3715
3716 rcu_read_lock();
35f861e3 3717 if (!netif_is_bridge_port(dev))
2cd41431
LL		 3718 goto unlock;
3719
3720 port = br_port_get_rcu(dev);
3721 if (!port || !port->br)
3722 goto unlock;
3723
3724 br = port->br;
3725
3726 switch (proto) {
3727 case ETH_P_IP:
3728 if (!timer_pending(&br->ip4_other_query.timer) ||
3729 rcu_dereference(br->ip4_querier.port) == port)
3730 goto unlock;
3731 break;
3993c4e1 3732#if IS_ENABLED(CONFIG_IPV6)
2cd41431
LL		 3733 case ETH_P_IPV6:
3734 if (!timer_pending(&br->ip6_other_query.timer) ||
3735 rcu_dereference(br->ip6_querier.port) == port)
3736 goto unlock;
3737 break;
3993c4e1 3738#endif
2cd41431
LL		 3739 default:
3740 goto unlock;
3741 }
3742
3743 ret = true;
3744unlock:
3745 rcu_read_unlock();
3746 return ret;
3747}
3748EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
1080ab95
NA		 3749
3750static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 3751 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 3752{
3753 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 3754 __be16 proto = skb->protocol;
3755 unsigned int t_len;
1080ab95
NA		 3756
3757 u64_stats_update_begin(&pstats->syncp);
3758 switch (proto) {
3759 case htons(ETH_P_IP):
a65056ec 3760 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 3761 switch (type) {
3762 case IGMP_HOST_MEMBERSHIP_REPORT:
3763 pstats->mstats.igmp_v1reports[dir]++;
3764 break;
3765 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3766 pstats->mstats.igmp_v2reports[dir]++;
3767 break;
3768 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3769 pstats->mstats.igmp_v3reports[dir]++;
3770 break;
3771 case IGMP_HOST_MEMBERSHIP_QUERY:
a65056ec
NA		 3772 if (t_len != sizeof(struct igmphdr)) {
3773 pstats->mstats.igmp_v3queries[dir]++;
3774 } else {
3775 unsigned int offset = skb_transport_offset(skb);
3776 struct igmphdr *ih, _ihdr;
3777
3778 ih = skb_header_pointer(skb, offset,
3779 sizeof(_ihdr), &_ihdr);
3780 if (!ih)
3781 break;
3782 if (!ih->code)
3783 pstats->mstats.igmp_v1queries[dir]++;
3784 else
3785 pstats->mstats.igmp_v2queries[dir]++;
3786 }
1080ab95
NA		 3787 break;
3788 case IGMP_HOST_LEAVE_MESSAGE:
3789 pstats->mstats.igmp_leaves[dir]++;
3790 break;
3791 }
3792 break;
3793#if IS_ENABLED(CONFIG_IPV6)
3794 case htons(ETH_P_IPV6):
a65056ec
NA		 3795 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
3796 sizeof(struct ipv6hdr);
3797 t_len -= skb_network_header_len(skb);
1080ab95
NA		 3798 switch (type) {
3799 case ICMPV6_MGM_REPORT:
3800 pstats->mstats.mld_v1reports[dir]++;
3801 break;
3802 case ICMPV6_MLD2_REPORT:
3803 pstats->mstats.mld_v2reports[dir]++;
3804 break;
3805 case ICMPV6_MGM_QUERY:
a65056ec
NA		 3806 if (t_len != sizeof(struct mld_msg))
3807 pstats->mstats.mld_v2queries[dir]++;
3808 else
3809 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 3810 break;
3811 case ICMPV6_MGM_REDUCTION:
3812 pstats->mstats.mld_leaves[dir]++;
3813 break;
3814 }
3815 break;
3816#endif /* CONFIG_IPV6 */
3817 }
3818 u64_stats_update_end(&pstats->syncp);
3819}
3820
3821void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
a65056ec 3822 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 3823{
3824 struct bridge_mcast_stats __percpu *stats;
3825
3826 /* if multicast_disabled is true then igmp type can't be set */
675779ad 3827 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 3828 return;
3829
3830 if (p)
3831 stats = p->mcast_stats;
3832 else
3833 stats = br->mcast_stats;
3834 if (WARN_ON(!stats))
3835 return;
3836
a65056ec 3837 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 3838}
3839
3840int br_multicast_init_stats(struct net_bridge *br)
3841{
3842 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
3843 if (!br->mcast_stats)
3844 return -ENOMEM;
3845
3846 return 0;
3847}
3848
b6fe0440
IS		 3849void br_multicast_uninit_stats(struct net_bridge *br)
3850{
3851 free_percpu(br->mcast_stats);
3852}
3853
b3b6a84c
AB		 3854/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
3855static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
1080ab95
NA		 3856{
3857 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
3858 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
3859}
3860
3861void br_multicast_get_stats(const struct net_bridge *br,
3862 const struct net_bridge_port *p,
3863 struct br_mcast_stats *dest)
3864{
3865 struct bridge_mcast_stats __percpu *stats;
3866 struct br_mcast_stats tdst;
3867 int i;
3868
3869 memset(dest, 0, sizeof(*dest));
3870 if (p)
3871 stats = p->mcast_stats;
3872 else
3873 stats = br->mcast_stats;
3874 if (WARN_ON(!stats))
3875 return;
3876
3877 memset(&tdst, 0, sizeof(tdst));
3878 for_each_possible_cpu(i) {
3879 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
3880 struct br_mcast_stats temp;
3881 unsigned int start;
3882
3883 do {
3884 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
3885 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
3886 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
3887
a65056ec
NA		 3888 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
3889 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
3890 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
1080ab95
NA		 3891 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
3892 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
3893 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
3894 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
3895 tdst.igmp_parse_errors += temp.igmp_parse_errors;
3896
a65056ec
NA		 3897 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
3898 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 3899 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
3900 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
3901 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
3902 tdst.mld_parse_errors += temp.mld_parse_errors;
3903 }
3904 memcpy(dest, &tdst, sizeof(*dest));
3905}
19e3a9c9
NA		 3906
3907int br_mdb_hash_init(struct net_bridge *br)
3908{
085b53c8
NA		 3909 int err;
3910
3911 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
3912 if (err)
3913 return err;
3914
3915 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
3916 if (err) {
3917 rhashtable_destroy(&br->sg_port_tbl);
3918 return err;
3919 }
3920
3921 return 0;
19e3a9c9
NA		 3922}
3923
3924void br_mdb_hash_fini(struct net_bridge *br)
3925{
085b53c8 3926 rhashtable_destroy(&br->sg_port_tbl);
19e3a9c9
NA		 3927 rhashtable_destroy(&br->mdb_hash_tbl);
3928}
Linux 6.x block layer and io_uring tree(s)