?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'trace-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux/fpc-iii.git] / net / bridge / br_multicast.c
blob257ac4e25f6d91b77bfc3efd4ba8e3ce0c419948
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Bridge multicast support.
4 *
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
6 */
7
8 #include <linux/err.h>
9 #include <linux/export.h>
10 #include <linux/if_ether.h>
11 #include <linux/igmp.h>
12 #include <linux/in.h>
13 #include <linux/jhash.h>
14 #include <linux/kernel.h>
15 #include <linux/log2.h>
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>
23 #include <linux/inetdevice.h>
24 #include <linux/mroute.h>
25 #include <net/ip.h>
26 #include <net/switchdev.h>
27 #if IS_ENABLED(CONFIG_IPV6)
28 #include <linux/icmpv6.h>
29 #include <net/ipv6.h>
30 #include <net/mld.h>
31 #include <net/ip6_checksum.h>
32 #include <net/addrconf.h>
33 #endif
34
35 #include "br_private.h"
36
37 static 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,
42 };
43
44 static 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
51 static void br_multicast_start_querier(struct net_bridge *br,
52 struct bridge_mcast_own_query *query);
53 static void br_multicast_add_router(struct net_bridge *br,
54 struct net_bridge_port *port);
55 static void br_ip4_multicast_leave_group(struct net_bridge *br,
56 struct net_bridge_port *port,
57 __be32 group,
58 __u16 vid,
59 const unsigned char *src);
60 static void br_multicast_port_group_rexmit(struct timer_list *t);
61
62 static void __del_port_router(struct net_bridge_port *p);
63 #if IS_ENABLED(CONFIG_IPV6)
64 static void br_ip6_multicast_leave_group(struct net_bridge *br,
65 struct net_bridge_port *port,
66 const struct in6_addr *group,
67 __u16 vid, const unsigned char *src);
68 #endif
69 static 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,
75 bool igmpv2_mldv1,
76 bool blocked);
77 static void br_multicast_find_del_pg(struct net_bridge *br,
78 struct net_bridge_port_group *pg);
79
80 static struct net_bridge_port_group *
81 br_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
90 static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
91 struct br_ip *dst)
92 {
93 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
94 }
95
96 struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
97 struct br_ip *dst)
98 {
99 struct net_bridge_mdb_entry *ent;
100
101 lockdep_assert_held_once(&br->multicast_lock);
102
103 rcu_read_lock();
104 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
105 rcu_read_unlock();
106
107 return ent;
108 }
109
110 static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
111 __be32 dst, __u16 vid)
112 {
113 struct br_ip br_dst;
114
115 memset(&br_dst, 0, sizeof(br_dst));
116 br_dst.dst.ip4 = dst;
117 br_dst.proto = htons(ETH_P_IP);
118 br_dst.vid = vid;
119
120 return br_mdb_ip_get(br, &br_dst);
121 }
122
123 #if IS_ENABLED(CONFIG_IPV6)
124 static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
125 const struct in6_addr *dst,
126 __u16 vid)
127 {
128 struct br_ip br_dst;
129
130 memset(&br_dst, 0, sizeof(br_dst));
131 br_dst.dst.ip6 = *dst;
132 br_dst.proto = htons(ETH_P_IPV6);
133 br_dst.vid = vid;
134
135 return br_mdb_ip_get(br, &br_dst);
136 }
137 #endif
138
139 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
140 struct sk_buff *skb, u16 vid)
141 {
142 struct br_ip ip;
143
144 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
145 return NULL;
146
147 if (BR_INPUT_SKB_CB(skb)->igmp)
148 return NULL;
149
150 memset(&ip, 0, sizeof(ip));
151 ip.proto = skb->protocol;
152 ip.vid = vid;
153
154 switch (skb->protocol) {
155 case htons(ETH_P_IP):
156 ip.dst.ip4 = ip_hdr(skb)->daddr;
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 }
166 break;
167 #if IS_ENABLED(CONFIG_IPV6)
168 case htons(ETH_P_IPV6):
169 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
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 }
179 break;
180 #endif
181 default:
182 ip.proto = 0;
183 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
184 }
185
186 return br_mdb_ip_get_rcu(br, &ip);
187 }
188
189 static bool br_port_group_equal(struct net_bridge_port_group *p,
190 struct net_bridge_port *port,
191 const unsigned char *src)
192 {
193 if (p->key.port != port)
194 return false;
195
196 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
197 return true;
198
199 return ether_addr_equal(src, p->eth_addr);
200 }
201
202 static void __fwd_add_star_excl(struct net_bridge_port_group *pg,
203 struct br_ip *sg_ip)
204 {
205 struct net_bridge_port_group_sg_key sg_key;
206 struct net_bridge *br = pg->key.port->br;
207 struct net_bridge_port_group *src_pg;
208
209 memset(&sg_key, 0, sizeof(sg_key));
210 sg_key.port = pg->key.port;
211 sg_key.addr = *sg_ip;
212 if (br_sg_port_find(br, &sg_key))
213 return;
214
215 src_pg = __br_multicast_add_group(br, pg->key.port, sg_ip, pg->eth_addr,
216 MCAST_INCLUDE, false, false);
217 if (IS_ERR_OR_NULL(src_pg) ||
218 src_pg->rt_protocol != RTPROT_KERNEL)
219 return;
220
221 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
222 }
223
224 static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
225 struct br_ip *sg_ip)
226 {
227 struct net_bridge_port_group_sg_key sg_key;
228 struct net_bridge *br = pg->key.port->br;
229 struct net_bridge_port_group *src_pg;
230
231 memset(&sg_key, 0, sizeof(sg_key));
232 sg_key.port = pg->key.port;
233 sg_key.addr = *sg_ip;
234 src_pg = br_sg_port_find(br, &sg_key);
235 if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
236 src_pg->rt_protocol != RTPROT_KERNEL)
237 return;
238
239 br_multicast_find_del_pg(br, src_pg);
240 }
241
242 /* When a port group transitions to (or is added as) EXCLUDE we need to add it
243 * to all other ports' S,G entries which are not blocked by the current group
244 * for proper replication, the assumption is that any S,G blocked entries
245 * are already added so the S,G,port lookup should skip them.
246 * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
247 * deleted we need to remove it from all ports' S,G entries where it was
248 * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
249 */
250 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
251 u8 filter_mode)
252 {
253 struct net_bridge *br = pg->key.port->br;
254 struct net_bridge_port_group *pg_lst;
255 struct net_bridge_mdb_entry *mp;
256 struct br_ip sg_ip;
257
258 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
259 return;
260
261 mp = br_mdb_ip_get(br, &pg->key.addr);
262 if (!mp)
263 return;
264
265 memset(&sg_ip, 0, sizeof(sg_ip));
266 sg_ip = pg->key.addr;
267 for (pg_lst = mlock_dereference(mp->ports, br);
268 pg_lst;
269 pg_lst = mlock_dereference(pg_lst->next, br)) {
270 struct net_bridge_group_src *src_ent;
271
272 if (pg_lst == pg)
273 continue;
274 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
275 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
276 continue;
277 sg_ip.src = src_ent->addr.src;
278 switch (filter_mode) {
279 case MCAST_INCLUDE:
280 __fwd_del_star_excl(pg, &sg_ip);
281 break;
282 case MCAST_EXCLUDE:
283 __fwd_add_star_excl(pg, &sg_ip);
284 break;
285 }
286 }
287 }
288 }
289
290 /* called when adding a new S,G with host_joined == false by default */
291 static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
292 struct net_bridge_port_group *sg)
293 {
294 struct net_bridge_mdb_entry *sg_mp;
295
296 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
297 return;
298 if (!star_mp->host_joined)
299 return;
300
301 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
302 if (!sg_mp)
303 return;
304 sg_mp->host_joined = true;
305 }
306
307 /* set the host_joined state of all of *,G's S,G entries */
308 static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
309 {
310 struct net_bridge *br = star_mp->br;
311 struct net_bridge_mdb_entry *sg_mp;
312 struct net_bridge_port_group *pg;
313 struct br_ip sg_ip;
314
315 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
316 return;
317
318 memset(&sg_ip, 0, sizeof(sg_ip));
319 sg_ip = star_mp->addr;
320 for (pg = mlock_dereference(star_mp->ports, br);
321 pg;
322 pg = mlock_dereference(pg->next, br)) {
323 struct net_bridge_group_src *src_ent;
324
325 hlist_for_each_entry(src_ent, &pg->src_list, node) {
326 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
327 continue;
328 sg_ip.src = src_ent->addr.src;
329 sg_mp = br_mdb_ip_get(br, &sg_ip);
330 if (!sg_mp)
331 continue;
332 sg_mp->host_joined = star_mp->host_joined;
333 }
334 }
335 }
336
337 static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
338 {
339 struct net_bridge_port_group __rcu **pp;
340 struct net_bridge_port_group *p;
341
342 /* *,G exclude ports are only added to S,G entries */
343 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
344 return;
345
346 /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
347 * we should ignore perm entries since they're managed by user-space
348 */
349 for (pp = &sgmp->ports;
350 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
351 pp = &p->next)
352 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
353 MDB_PG_FLAGS_PERMANENT)))
354 return;
355
356 /* currently the host can only have joined the *,G which means
357 * we treat it as EXCLUDE {}, so for an S,G it's considered a
358 * STAR_EXCLUDE entry and we can safely leave it
359 */
360 sgmp->host_joined = false;
361
362 for (pp = &sgmp->ports;
363 (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
364 if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
365 br_multicast_del_pg(sgmp, p, pp);
366 else
367 pp = &p->next;
368 }
369 }
370
371 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
372 struct net_bridge_port_group *sg)
373 {
374 struct net_bridge_port_group_sg_key sg_key;
375 struct net_bridge *br = star_mp->br;
376 struct net_bridge_port_group *pg;
377
378 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
379 return;
380 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
381 return;
382
383 br_multicast_sg_host_state(star_mp, sg);
384 memset(&sg_key, 0, sizeof(sg_key));
385 sg_key.addr = sg->key.addr;
386 /* we need to add all exclude ports to the S,G */
387 for (pg = mlock_dereference(star_mp->ports, br);
388 pg;
389 pg = mlock_dereference(pg->next, br)) {
390 struct net_bridge_port_group *src_pg;
391
392 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
393 continue;
394
395 sg_key.port = pg->key.port;
396 if (br_sg_port_find(br, &sg_key))
397 continue;
398
399 src_pg = __br_multicast_add_group(br, pg->key.port,
400 &sg->key.addr,
401 sg->eth_addr,
402 MCAST_INCLUDE, false, false);
403 if (IS_ERR_OR_NULL(src_pg) ||
404 src_pg->rt_protocol != RTPROT_KERNEL)
405 continue;
406 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
407 }
408 }
409
410 static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
411 {
412 struct net_bridge_mdb_entry *star_mp;
413 struct net_bridge_port_group *sg;
414 struct br_ip sg_ip;
415
416 if (src->flags & BR_SGRP_F_INSTALLED)
417 return;
418
419 memset(&sg_ip, 0, sizeof(sg_ip));
420 sg_ip = src->pg->key.addr;
421 sg_ip.src = src->addr.src;
422 sg = __br_multicast_add_group(src->br, src->pg->key.port, &sg_ip,
423 src->pg->eth_addr, MCAST_INCLUDE, false,
424 !timer_pending(&src->timer));
425 if (IS_ERR_OR_NULL(sg))
426 return;
427 src->flags |= BR_SGRP_F_INSTALLED;
428 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
429
430 /* if it was added by user-space as perm we can skip next steps */
431 if (sg->rt_protocol != RTPROT_KERNEL &&
432 (sg->flags & MDB_PG_FLAGS_PERMANENT))
433 return;
434
435 /* the kernel is now responsible for removing this S,G */
436 del_timer(&sg->timer);
437 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
438 if (!star_mp)
439 return;
440
441 br_multicast_sg_add_exclude_ports(star_mp, sg);
442 }
443
444 static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src)
445 {
446 struct net_bridge_port_group *p, *pg = src->pg;
447 struct net_bridge_port_group __rcu **pp;
448 struct net_bridge_mdb_entry *mp;
449 struct br_ip sg_ip;
450
451 memset(&sg_ip, 0, sizeof(sg_ip));
452 sg_ip = pg->key.addr;
453 sg_ip.src = src->addr.src;
454
455 mp = br_mdb_ip_get(src->br, &sg_ip);
456 if (!mp)
457 return;
458
459 for (pp = &mp->ports;
460 (p = mlock_dereference(*pp, src->br)) != NULL;
461 pp = &p->next) {
462 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
463 continue;
464
465 if (p->rt_protocol != RTPROT_KERNEL &&
466 (p->flags & MDB_PG_FLAGS_PERMANENT))
467 break;
468
469 br_multicast_del_pg(mp, p, pp);
470 break;
471 }
472 src->flags &= ~BR_SGRP_F_INSTALLED;
473 }
474
475 /* install S,G and based on src's timer enable or disable forwarding */
476 static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
477 {
478 struct net_bridge_port_group_sg_key sg_key;
479 struct net_bridge_port_group *sg;
480 u8 old_flags;
481
482 br_multicast_fwd_src_add(src);
483
484 memset(&sg_key, 0, sizeof(sg_key));
485 sg_key.addr = src->pg->key.addr;
486 sg_key.addr.src = src->addr.src;
487 sg_key.port = src->pg->key.port;
488
489 sg = br_sg_port_find(src->br, &sg_key);
490 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
491 return;
492
493 old_flags = sg->flags;
494 if (timer_pending(&src->timer))
495 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
496 else
497 sg->flags |= MDB_PG_FLAGS_BLOCKED;
498
499 if (old_flags != sg->flags) {
500 struct net_bridge_mdb_entry *sg_mp;
501
502 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
503 if (!sg_mp)
504 return;
505 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
506 }
507 }
508
509 static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
510 {
511 struct net_bridge_mdb_entry *mp;
512
513 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
514 WARN_ON(!hlist_unhashed(&mp->mdb_node));
515 WARN_ON(mp->ports);
516
517 del_timer_sync(&mp->timer);
518 kfree_rcu(mp, rcu);
519 }
520
521 static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
522 {
523 struct net_bridge *br = mp->br;
524
525 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
526 br_mdb_rht_params);
527 hlist_del_init_rcu(&mp->mdb_node);
528 hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
529 queue_work(system_long_wq, &br->mcast_gc_work);
530 }
531
532 static void br_multicast_group_expired(struct timer_list *t)
533 {
534 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
535 struct net_bridge *br = mp->br;
536
537 spin_lock(&br->multicast_lock);
538 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
539 timer_pending(&mp->timer))
540 goto out;
541
542 br_multicast_host_leave(mp, true);
543
544 if (mp->ports)
545 goto out;
546 br_multicast_del_mdb_entry(mp);
547 out:
548 spin_unlock(&br->multicast_lock);
549 }
550
551 static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
552 {
553 struct net_bridge_group_src *src;
554
555 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
556 WARN_ON(!hlist_unhashed(&src->node));
557
558 del_timer_sync(&src->timer);
559 kfree_rcu(src, rcu);
560 }
561
562 static void br_multicast_del_group_src(struct net_bridge_group_src *src)
563 {
564 struct net_bridge *br = src->pg->key.port->br;
565
566 br_multicast_fwd_src_remove(src);
567 hlist_del_init_rcu(&src->node);
568 src->pg->src_ents--;
569 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
570 queue_work(system_long_wq, &br->mcast_gc_work);
571 }
572
573 static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
574 {
575 struct net_bridge_port_group *pg;
576
577 pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
578 WARN_ON(!hlist_unhashed(&pg->mglist));
579 WARN_ON(!hlist_empty(&pg->src_list));
580
581 del_timer_sync(&pg->rexmit_timer);
582 del_timer_sync(&pg->timer);
583 kfree_rcu(pg, rcu);
584 }
585
586 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
587 struct net_bridge_port_group *pg,
588 struct net_bridge_port_group __rcu **pp)
589 {
590 struct net_bridge *br = pg->key.port->br;
591 struct net_bridge_group_src *ent;
592 struct hlist_node *tmp;
593
594 rcu_assign_pointer(*pp, pg->next);
595 hlist_del_init(&pg->mglist);
596 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
597 br_multicast_del_group_src(ent);
598 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
599 if (!br_multicast_is_star_g(&mp->addr)) {
600 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
601 br_sg_port_rht_params);
602 br_multicast_sg_del_exclude_ports(mp);
603 } else {
604 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
605 }
606 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
607 queue_work(system_long_wq, &br->mcast_gc_work);
608
609 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
610 mod_timer(&mp->timer, jiffies);
611 }
612
613 static void br_multicast_find_del_pg(struct net_bridge *br,
614 struct net_bridge_port_group *pg)
615 {
616 struct net_bridge_port_group __rcu **pp;
617 struct net_bridge_mdb_entry *mp;
618 struct net_bridge_port_group *p;
619
620 mp = br_mdb_ip_get(br, &pg->key.addr);
621 if (WARN_ON(!mp))
622 return;
623
624 for (pp = &mp->ports;
625 (p = mlock_dereference(*pp, br)) != NULL;
626 pp = &p->next) {
627 if (p != pg)
628 continue;
629
630 br_multicast_del_pg(mp, pg, pp);
631 return;
632 }
633
634 WARN_ON(1);
635 }
636
637 static void br_multicast_port_group_expired(struct timer_list *t)
638 {
639 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
640 struct net_bridge_group_src *src_ent;
641 struct net_bridge *br = pg->key.port->br;
642 struct hlist_node *tmp;
643 bool changed;
644
645 spin_lock(&br->multicast_lock);
646 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
647 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
648 goto out;
649
650 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
651 pg->filter_mode = MCAST_INCLUDE;
652 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
653 if (!timer_pending(&src_ent->timer)) {
654 br_multicast_del_group_src(src_ent);
655 changed = true;
656 }
657 }
658
659 if (hlist_empty(&pg->src_list)) {
660 br_multicast_find_del_pg(br, pg);
661 } else if (changed) {
662 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
663
664 if (changed && br_multicast_is_star_g(&pg->key.addr))
665 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
666
667 if (WARN_ON(!mp))
668 goto out;
669 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
670 }
671 out:
672 spin_unlock(&br->multicast_lock);
673 }
674
675 static void br_multicast_gc(struct hlist_head *head)
676 {
677 struct net_bridge_mcast_gc *gcent;
678 struct hlist_node *tmp;
679
680 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
681 hlist_del_init(&gcent->gc_node);
682 gcent->destroy(gcent);
683 }
684 }
685
686 static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
687 struct net_bridge_port_group *pg,
688 __be32 ip_dst, __be32 group,
689 bool with_srcs, bool over_lmqt,
690 u8 sflag, u8 *igmp_type,
691 bool *need_rexmit)
692 {
693 struct net_bridge_port *p = pg ? pg->key.port : NULL;
694 struct net_bridge_group_src *ent;
695 size_t pkt_size, igmp_hdr_size;
696 unsigned long now = jiffies;
697 struct igmpv3_query *ihv3;
698 void *csum_start = NULL;
699 __sum16 *csum = NULL;
700 struct sk_buff *skb;
701 struct igmphdr *ih;
702 struct ethhdr *eth;
703 unsigned long lmqt;
704 struct iphdr *iph;
705 u16 lmqt_srcs = 0;
706
707 igmp_hdr_size = sizeof(*ih);
708 if (br->multicast_igmp_version == 3) {
709 igmp_hdr_size = sizeof(*ihv3);
710 if (pg && with_srcs) {
711 lmqt = now + (br->multicast_last_member_interval *
712 br->multicast_last_member_count);
713 hlist_for_each_entry(ent, &pg->src_list, node) {
714 if (over_lmqt == time_after(ent->timer.expires,
715 lmqt) &&
716 ent->src_query_rexmit_cnt > 0)
717 lmqt_srcs++;
718 }
719
720 if (!lmqt_srcs)
721 return NULL;
722 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
723 }
724 }
725
726 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
727 if ((p && pkt_size > p->dev->mtu) ||
728 pkt_size > br->dev->mtu)
729 return NULL;
730
731 skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
732 if (!skb)
733 goto out;
734
735 skb->protocol = htons(ETH_P_IP);
736
737 skb_reset_mac_header(skb);
738 eth = eth_hdr(skb);
739
740 ether_addr_copy(eth->h_source, br->dev->dev_addr);
741 ip_eth_mc_map(ip_dst, eth->h_dest);
742 eth->h_proto = htons(ETH_P_IP);
743 skb_put(skb, sizeof(*eth));
744
745 skb_set_network_header(skb, skb->len);
746 iph = ip_hdr(skb);
747 iph->tot_len = htons(pkt_size - sizeof(*eth));
748
749 iph->version = 4;
750 iph->ihl = 6;
751 iph->tos = 0xc0;
752 iph->id = 0;
753 iph->frag_off = htons(IP_DF);
754 iph->ttl = 1;
755 iph->protocol = IPPROTO_IGMP;
756 iph->saddr = br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
757 inet_select_addr(br->dev, 0, RT_SCOPE_LINK) : 0;
758 iph->daddr = ip_dst;
759 ((u8 *)&iph[1])[0] = IPOPT_RA;
760 ((u8 *)&iph[1])[1] = 4;
761 ((u8 *)&iph[1])[2] = 0;
762 ((u8 *)&iph[1])[3] = 0;
763 ip_send_check(iph);
764 skb_put(skb, 24);
765
766 skb_set_transport_header(skb, skb->len);
767 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
768
769 switch (br->multicast_igmp_version) {
770 case 2:
771 ih = igmp_hdr(skb);
772 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
773 ih->code = (group ? br->multicast_last_member_interval :
774 br->multicast_query_response_interval) /
775 (HZ / IGMP_TIMER_SCALE);
776 ih->group = group;
777 ih->csum = 0;
778 csum = &ih->csum;
779 csum_start = (void *)ih;
780 break;
781 case 3:
782 ihv3 = igmpv3_query_hdr(skb);
783 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
784 ihv3->code = (group ? br->multicast_last_member_interval :
785 br->multicast_query_response_interval) /
786 (HZ / IGMP_TIMER_SCALE);
787 ihv3->group = group;
788 ihv3->qqic = br->multicast_query_interval / HZ;
789 ihv3->nsrcs = htons(lmqt_srcs);
790 ihv3->resv = 0;
791 ihv3->suppress = sflag;
792 ihv3->qrv = 2;
793 ihv3->csum = 0;
794 csum = &ihv3->csum;
795 csum_start = (void *)ihv3;
796 if (!pg || !with_srcs)
797 break;
798
799 lmqt_srcs = 0;
800 hlist_for_each_entry(ent, &pg->src_list, node) {
801 if (over_lmqt == time_after(ent->timer.expires,
802 lmqt) &&
803 ent->src_query_rexmit_cnt > 0) {
804 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
805 ent->src_query_rexmit_cnt--;
806 if (need_rexmit && ent->src_query_rexmit_cnt)
807 *need_rexmit = true;
808 }
809 }
810 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
811 kfree_skb(skb);
812 return NULL;
813 }
814 break;
815 }
816
817 if (WARN_ON(!csum || !csum_start)) {
818 kfree_skb(skb);
819 return NULL;
820 }
821
822 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
823 skb_put(skb, igmp_hdr_size);
824 __skb_pull(skb, sizeof(*eth));
825
826 out:
827 return skb;
828 }
829
830 #if IS_ENABLED(CONFIG_IPV6)
831 static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
832 struct net_bridge_port_group *pg,
833 const struct in6_addr *ip6_dst,
834 const struct in6_addr *group,
835 bool with_srcs, bool over_llqt,
836 u8 sflag, u8 *igmp_type,
837 bool *need_rexmit)
838 {
839 struct net_bridge_port *p = pg ? pg->key.port : NULL;
840 struct net_bridge_group_src *ent;
841 size_t pkt_size, mld_hdr_size;
842 unsigned long now = jiffies;
843 struct mld2_query *mld2q;
844 void *csum_start = NULL;
845 unsigned long interval;
846 __sum16 *csum = NULL;
847 struct ipv6hdr *ip6h;
848 struct mld_msg *mldq;
849 struct sk_buff *skb;
850 unsigned long llqt;
851 struct ethhdr *eth;
852 u16 llqt_srcs = 0;
853 u8 *hopopt;
854
855 mld_hdr_size = sizeof(*mldq);
856 if (br->multicast_mld_version == 2) {
857 mld_hdr_size = sizeof(*mld2q);
858 if (pg && with_srcs) {
859 llqt = now + (br->multicast_last_member_interval *
860 br->multicast_last_member_count);
861 hlist_for_each_entry(ent, &pg->src_list, node) {
862 if (over_llqt == time_after(ent->timer.expires,
863 llqt) &&
864 ent->src_query_rexmit_cnt > 0)
865 llqt_srcs++;
866 }
867
868 if (!llqt_srcs)
869 return NULL;
870 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
871 }
872 }
873
874 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
875 if ((p && pkt_size > p->dev->mtu) ||
876 pkt_size > br->dev->mtu)
877 return NULL;
878
879 skb = netdev_alloc_skb_ip_align(br->dev, pkt_size);
880 if (!skb)
881 goto out;
882
883 skb->protocol = htons(ETH_P_IPV6);
884
885 /* Ethernet header */
886 skb_reset_mac_header(skb);
887 eth = eth_hdr(skb);
888
889 ether_addr_copy(eth->h_source, br->dev->dev_addr);
890 eth->h_proto = htons(ETH_P_IPV6);
891 skb_put(skb, sizeof(*eth));
892
893 /* IPv6 header + HbH option */
894 skb_set_network_header(skb, skb->len);
895 ip6h = ipv6_hdr(skb);
896
897 *(__force __be32 *)ip6h = htonl(0x60000000);
898 ip6h->payload_len = htons(8 + mld_hdr_size);
899 ip6h->nexthdr = IPPROTO_HOPOPTS;
900 ip6h->hop_limit = 1;
901 ip6h->daddr = *ip6_dst;
902 if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0,
903 &ip6h->saddr)) {
904 kfree_skb(skb);
905 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, false);
906 return NULL;
907 }
908
909 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
910 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
911
912 hopopt = (u8 *)(ip6h + 1);
913 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
914 hopopt[1] = 0; /* length of HbH */
915 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
916 hopopt[3] = 2; /* Length of RA Option */
917 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
918 hopopt[5] = 0;
919 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
920 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
921
922 skb_put(skb, sizeof(*ip6h) + 8);
923
924 /* ICMPv6 */
925 skb_set_transport_header(skb, skb->len);
926 interval = ipv6_addr_any(group) ?
927 br->multicast_query_response_interval :
928 br->multicast_last_member_interval;
929 *igmp_type = ICMPV6_MGM_QUERY;
930 switch (br->multicast_mld_version) {
931 case 1:
932 mldq = (struct mld_msg *)icmp6_hdr(skb);
933 mldq->mld_type = ICMPV6_MGM_QUERY;
934 mldq->mld_code = 0;
935 mldq->mld_cksum = 0;
936 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
937 mldq->mld_reserved = 0;
938 mldq->mld_mca = *group;
939 csum = &mldq->mld_cksum;
940 csum_start = (void *)mldq;
941 break;
942 case 2:
943 mld2q = (struct mld2_query *)icmp6_hdr(skb);
944 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
945 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
946 mld2q->mld2q_code = 0;
947 mld2q->mld2q_cksum = 0;
948 mld2q->mld2q_resv1 = 0;
949 mld2q->mld2q_resv2 = 0;
950 mld2q->mld2q_suppress = sflag;
951 mld2q->mld2q_qrv = 2;
952 mld2q->mld2q_nsrcs = htons(llqt_srcs);
953 mld2q->mld2q_qqic = br->multicast_query_interval / HZ;
954 mld2q->mld2q_mca = *group;
955 csum = &mld2q->mld2q_cksum;
956 csum_start = (void *)mld2q;
957 if (!pg || !with_srcs)
958 break;
959
960 llqt_srcs = 0;
961 hlist_for_each_entry(ent, &pg->src_list, node) {
962 if (over_llqt == time_after(ent->timer.expires,
963 llqt) &&
964 ent->src_query_rexmit_cnt > 0) {
965 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
966 ent->src_query_rexmit_cnt--;
967 if (need_rexmit && ent->src_query_rexmit_cnt)
968 *need_rexmit = true;
969 }
970 }
971 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
972 kfree_skb(skb);
973 return NULL;
974 }
975 break;
976 }
977
978 if (WARN_ON(!csum || !csum_start)) {
979 kfree_skb(skb);
980 return NULL;
981 }
982
983 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
984 IPPROTO_ICMPV6,
985 csum_partial(csum_start, mld_hdr_size, 0));
986 skb_put(skb, mld_hdr_size);
987 __skb_pull(skb, sizeof(*eth));
988
989 out:
990 return skb;
991 }
992 #endif
993
994 static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
995 struct net_bridge_port_group *pg,
996 struct br_ip *ip_dst,
997 struct br_ip *group,
998 bool with_srcs, bool over_lmqt,
999 u8 sflag, u8 *igmp_type,
1000 bool *need_rexmit)
1001 {
1002 __be32 ip4_dst;
1003
1004 switch (group->proto) {
1005 case htons(ETH_P_IP):
1006 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
1007 return br_ip4_multicast_alloc_query(br, pg,
1008 ip4_dst, group->dst.ip4,
1009 with_srcs, over_lmqt,
1010 sflag, igmp_type,
1011 need_rexmit);
1012 #if IS_ENABLED(CONFIG_IPV6)
1013 case htons(ETH_P_IPV6): {
1014 struct in6_addr ip6_dst;
1015
1016 if (ip_dst)
1017 ip6_dst = ip_dst->dst.ip6;
1018 else
1019 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1020 htonl(1));
1021
1022 return br_ip6_multicast_alloc_query(br, pg,
1023 &ip6_dst, &group->dst.ip6,
1024 with_srcs, over_lmqt,
1025 sflag, igmp_type,
1026 need_rexmit);
1027 }
1028 #endif
1029 }
1030 return NULL;
1031 }
1032
1033 struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
1034 struct br_ip *group)
1035 {
1036 struct net_bridge_mdb_entry *mp;
1037 int err;
1038
1039 mp = br_mdb_ip_get(br, group);
1040 if (mp)
1041 return mp;
1042
1043 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
1044 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1045 return ERR_PTR(-E2BIG);
1046 }
1047
1048 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1049 if (unlikely(!mp))
1050 return ERR_PTR(-ENOMEM);
1051
1052 mp->br = br;
1053 mp->addr = *group;
1054 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
1055 timer_setup(&mp->timer, br_multicast_group_expired, 0);
1056 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1057 br_mdb_rht_params);
1058 if (err) {
1059 kfree(mp);
1060 mp = ERR_PTR(err);
1061 } else {
1062 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1063 }
1064
1065 return mp;
1066 }
1067
1068 static void br_multicast_group_src_expired(struct timer_list *t)
1069 {
1070 struct net_bridge_group_src *src = from_timer(src, t, timer);
1071 struct net_bridge_port_group *pg;
1072 struct net_bridge *br = src->br;
1073
1074 spin_lock(&br->multicast_lock);
1075 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1076 timer_pending(&src->timer))
1077 goto out;
1078
1079 pg = src->pg;
1080 if (pg->filter_mode == MCAST_INCLUDE) {
1081 br_multicast_del_group_src(src);
1082 if (!hlist_empty(&pg->src_list))
1083 goto out;
1084 br_multicast_find_del_pg(br, pg);
1085 } else {
1086 br_multicast_fwd_src_handle(src);
1087 }
1088
1089 out:
1090 spin_unlock(&br->multicast_lock);
1091 }
1092
1093 static struct net_bridge_group_src *
1094 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1095 {
1096 struct net_bridge_group_src *ent;
1097
1098 switch (ip->proto) {
1099 case htons(ETH_P_IP):
1100 hlist_for_each_entry(ent, &pg->src_list, node)
1101 if (ip->src.ip4 == ent->addr.src.ip4)
1102 return ent;
1103 break;
1104 #if IS_ENABLED(CONFIG_IPV6)
1105 case htons(ETH_P_IPV6):
1106 hlist_for_each_entry(ent, &pg->src_list, node)
1107 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
1108 return ent;
1109 break;
1110 #endif
1111 }
1112
1113 return NULL;
1114 }
1115
1116 static struct net_bridge_group_src *
1117 br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1118 {
1119 struct net_bridge_group_src *grp_src;
1120
1121 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1122 return NULL;
1123
1124 switch (src_ip->proto) {
1125 case htons(ETH_P_IP):
1126 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1127 ipv4_is_multicast(src_ip->src.ip4))
1128 return NULL;
1129 break;
1130 #if IS_ENABLED(CONFIG_IPV6)
1131 case htons(ETH_P_IPV6):
1132 if (ipv6_addr_any(&src_ip->src.ip6) ||
1133 ipv6_addr_is_multicast(&src_ip->src.ip6))
1134 return NULL;
1135 break;
1136 #endif
1137 }
1138
1139 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1140 if (unlikely(!grp_src))
1141 return NULL;
1142
1143 grp_src->pg = pg;
1144 grp_src->br = pg->key.port->br;
1145 grp_src->addr = *src_ip;
1146 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
1147 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1148
1149 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1150 pg->src_ents++;
1151
1152 return grp_src;
1153 }
1154
1155 struct net_bridge_port_group *br_multicast_new_port_group(
1156 struct net_bridge_port *port,
1157 struct br_ip *group,
1158 struct net_bridge_port_group __rcu *next,
1159 unsigned char flags,
1160 const unsigned char *src,
1161 u8 filter_mode,
1162 u8 rt_protocol)
1163 {
1164 struct net_bridge_port_group *p;
1165
1166 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1167 if (unlikely(!p))
1168 return NULL;
1169
1170 p->key.addr = *group;
1171 p->key.port = port;
1172 p->flags = flags;
1173 p->filter_mode = filter_mode;
1174 p->rt_protocol = rt_protocol;
1175 p->mcast_gc.destroy = br_multicast_destroy_port_group;
1176 INIT_HLIST_HEAD(&p->src_list);
1177
1178 if (!br_multicast_is_star_g(group) &&
1179 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1180 br_sg_port_rht_params)) {
1181 kfree(p);
1182 return NULL;
1183 }
1184
1185 rcu_assign_pointer(p->next, next);
1186 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
1187 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1188 hlist_add_head(&p->mglist, &port->mglist);
1189
1190 if (src)
1191 memcpy(p->eth_addr, src, ETH_ALEN);
1192 else
1193 eth_broadcast_addr(p->eth_addr);
1194
1195 return p;
1196 }
1197
1198 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify)
1199 {
1200 if (!mp->host_joined) {
1201 mp->host_joined = true;
1202 if (br_multicast_is_star_g(&mp->addr))
1203 br_multicast_star_g_host_state(mp);
1204 if (notify)
1205 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1206 }
1207
1208 if (br_group_is_l2(&mp->addr))
1209 return;
1210
1211 mod_timer(&mp->timer, jiffies + mp->br->multicast_membership_interval);
1212 }
1213
1214 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1215 {
1216 if (!mp->host_joined)
1217 return;
1218
1219 mp->host_joined = false;
1220 if (br_multicast_is_star_g(&mp->addr))
1221 br_multicast_star_g_host_state(mp);
1222 if (notify)
1223 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1224 }
1225
1226 static struct net_bridge_port_group *
1227 __br_multicast_add_group(struct net_bridge *br,
1228 struct net_bridge_port *port,
1229 struct br_ip *group,
1230 const unsigned char *src,
1231 u8 filter_mode,
1232 bool igmpv2_mldv1,
1233 bool blocked)
1234 {
1235 struct net_bridge_port_group __rcu **pp;
1236 struct net_bridge_port_group *p = NULL;
1237 struct net_bridge_mdb_entry *mp;
1238 unsigned long now = jiffies;
1239
1240 if (!netif_running(br->dev) ||
1241 (port && port->state == BR_STATE_DISABLED))
1242 goto out;
1243
1244 mp = br_multicast_new_group(br, group);
1245 if (IS_ERR(mp))
1246 return ERR_PTR(PTR_ERR(mp));
1247
1248 if (!port) {
1249 br_multicast_host_join(mp, true);
1250 goto out;
1251 }
1252
1253 for (pp = &mp->ports;
1254 (p = mlock_dereference(*pp, br)) != NULL;
1255 pp = &p->next) {
1256 if (br_port_group_equal(p, port, src))
1257 goto found;
1258 if ((unsigned long)p->key.port < (unsigned long)port)
1259 break;
1260 }
1261
1262 p = br_multicast_new_port_group(port, group, *pp, 0, src,
1263 filter_mode, RTPROT_KERNEL);
1264 if (unlikely(!p)) {
1265 p = ERR_PTR(-ENOMEM);
1266 goto out;
1267 }
1268 rcu_assign_pointer(*pp, p);
1269 if (blocked)
1270 p->flags |= MDB_PG_FLAGS_BLOCKED;
1271 br_mdb_notify(br->dev, mp, p, RTM_NEWMDB);
1272
1273 found:
1274 if (igmpv2_mldv1)
1275 mod_timer(&p->timer, now + br->multicast_membership_interval);
1276
1277 out:
1278 return p;
1279 }
1280
1281 static int br_multicast_add_group(struct net_bridge *br,
1282 struct net_bridge_port *port,
1283 struct br_ip *group,
1284 const unsigned char *src,
1285 u8 filter_mode,
1286 bool igmpv2_mldv1)
1287 {
1288 struct net_bridge_port_group *pg;
1289 int err;
1290
1291 spin_lock(&br->multicast_lock);
1292 pg = __br_multicast_add_group(br, port, group, src, filter_mode,
1293 igmpv2_mldv1, false);
1294 /* NULL is considered valid for host joined groups */
1295 err = IS_ERR(pg) ? PTR_ERR(pg) : 0;
1296 spin_unlock(&br->multicast_lock);
1297
1298 return err;
1299 }
1300
1301 static int br_ip4_multicast_add_group(struct net_bridge *br,
1302 struct net_bridge_port *port,
1303 __be32 group,
1304 __u16 vid,
1305 const unsigned char *src,
1306 bool igmpv2)
1307 {
1308 struct br_ip br_group;
1309 u8 filter_mode;
1310
1311 if (ipv4_is_local_multicast(group))
1312 return 0;
1313
1314 memset(&br_group, 0, sizeof(br_group));
1315 br_group.dst.ip4 = group;
1316 br_group.proto = htons(ETH_P_IP);
1317 br_group.vid = vid;
1318 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1319
1320 return br_multicast_add_group(br, port, &br_group, src, filter_mode,
1321 igmpv2);
1322 }
1323
1324 #if IS_ENABLED(CONFIG_IPV6)
1325 static int br_ip6_multicast_add_group(struct net_bridge *br,
1326 struct net_bridge_port *port,
1327 const struct in6_addr *group,
1328 __u16 vid,
1329 const unsigned char *src,
1330 bool mldv1)
1331 {
1332 struct br_ip br_group;
1333 u8 filter_mode;
1334
1335 if (ipv6_addr_is_ll_all_nodes(group))
1336 return 0;
1337
1338 memset(&br_group, 0, sizeof(br_group));
1339 br_group.dst.ip6 = *group;
1340 br_group.proto = htons(ETH_P_IPV6);
1341 br_group.vid = vid;
1342 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1343
1344 return br_multicast_add_group(br, port, &br_group, src, filter_mode,
1345 mldv1);
1346 }
1347 #endif
1348
1349 static void br_multicast_router_expired(struct timer_list *t)
1350 {
1351 struct net_bridge_port *port =
1352 from_timer(port, t, multicast_router_timer);
1353 struct net_bridge *br = port->br;
1354
1355 spin_lock(&br->multicast_lock);
1356 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
1357 port->multicast_router == MDB_RTR_TYPE_PERM ||
1358 timer_pending(&port->multicast_router_timer))
1359 goto out;
1360
1361 __del_port_router(port);
1362 out:
1363 spin_unlock(&br->multicast_lock);
1364 }
1365
1366 static void br_mc_router_state_change(struct net_bridge *p,
1367 bool is_mc_router)
1368 {
1369 struct switchdev_attr attr = {
1370 .orig_dev = p->dev,
1371 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1372 .flags = SWITCHDEV_F_DEFER,
1373 .u.mrouter = is_mc_router,
1374 };
1375
1376 switchdev_port_attr_set(p->dev, &attr);
1377 }
1378
1379 static void br_multicast_local_router_expired(struct timer_list *t)
1380 {
1381 struct net_bridge *br = from_timer(br, t, multicast_router_timer);
1382
1383 spin_lock(&br->multicast_lock);
1384 if (br->multicast_router == MDB_RTR_TYPE_DISABLED ||
1385 br->multicast_router == MDB_RTR_TYPE_PERM ||
1386 timer_pending(&br->multicast_router_timer))
1387 goto out;
1388
1389 br_mc_router_state_change(br, false);
1390 out:
1391 spin_unlock(&br->multicast_lock);
1392 }
1393
1394 static void br_multicast_querier_expired(struct net_bridge *br,
1395 struct bridge_mcast_own_query *query)
1396 {
1397 spin_lock(&br->multicast_lock);
1398 if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1399 goto out;
1400
1401 br_multicast_start_querier(br, query);
1402
1403 out:
1404 spin_unlock(&br->multicast_lock);
1405 }
1406
1407 static void br_ip4_multicast_querier_expired(struct timer_list *t)
1408 {
1409 struct net_bridge *br = from_timer(br, t, ip4_other_query.timer);
1410
1411 br_multicast_querier_expired(br, &br->ip4_own_query);
1412 }
1413
1414 #if IS_ENABLED(CONFIG_IPV6)
1415 static void br_ip6_multicast_querier_expired(struct timer_list *t)
1416 {
1417 struct net_bridge *br = from_timer(br, t, ip6_other_query.timer);
1418
1419 br_multicast_querier_expired(br, &br->ip6_own_query);
1420 }
1421 #endif
1422
1423 static void br_multicast_select_own_querier(struct net_bridge *br,
1424 struct br_ip *ip,
1425 struct sk_buff *skb)
1426 {
1427 if (ip->proto == htons(ETH_P_IP))
1428 br->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
1429 #if IS_ENABLED(CONFIG_IPV6)
1430 else
1431 br->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
1432 #endif
1433 }
1434
1435 static void __br_multicast_send_query(struct net_bridge *br,
1436 struct net_bridge_port *port,
1437 struct net_bridge_port_group *pg,
1438 struct br_ip *ip_dst,
1439 struct br_ip *group,
1440 bool with_srcs,
1441 u8 sflag,
1442 bool *need_rexmit)
1443 {
1444 bool over_lmqt = !!sflag;
1445 struct sk_buff *skb;
1446 u8 igmp_type;
1447
1448 again_under_lmqt:
1449 skb = br_multicast_alloc_query(br, pg, ip_dst, group, with_srcs,
1450 over_lmqt, sflag, &igmp_type,
1451 need_rexmit);
1452 if (!skb)
1453 return;
1454
1455 if (port) {
1456 skb->dev = port->dev;
1457 br_multicast_count(br, port, skb, igmp_type,
1458 BR_MCAST_DIR_TX);
1459 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
1460 dev_net(port->dev), NULL, skb, NULL, skb->dev,
1461 br_dev_queue_push_xmit);
1462
1463 if (over_lmqt && with_srcs && sflag) {
1464 over_lmqt = false;
1465 goto again_under_lmqt;
1466 }
1467 } else {
1468 br_multicast_select_own_querier(br, group, skb);
1469 br_multicast_count(br, port, skb, igmp_type,
1470 BR_MCAST_DIR_RX);
1471 netif_rx(skb);
1472 }
1473 }
1474
1475 static void br_multicast_send_query(struct net_bridge *br,
1476 struct net_bridge_port *port,
1477 struct bridge_mcast_own_query *own_query)
1478 {
1479 struct bridge_mcast_other_query *other_query = NULL;
1480 struct br_ip br_group;
1481 unsigned long time;
1482
1483 if (!netif_running(br->dev) ||
1484 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1485 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
1486 return;
1487
1488 memset(&br_group.dst, 0, sizeof(br_group.dst));
1489
1490 if (port ? (own_query == &port->ip4_own_query) :
1491 (own_query == &br->ip4_own_query)) {
1492 other_query = &br->ip4_other_query;
1493 br_group.proto = htons(ETH_P_IP);
1494 #if IS_ENABLED(CONFIG_IPV6)
1495 } else {
1496 other_query = &br->ip6_other_query;
1497 br_group.proto = htons(ETH_P_IPV6);
1498 #endif
1499 }
1500
1501 if (!other_query || timer_pending(&other_query->timer))
1502 return;
1503
1504 __br_multicast_send_query(br, port, NULL, NULL, &br_group, false, 0,
1505 NULL);
1506
1507 time = jiffies;
1508 time += own_query->startup_sent < br->multicast_startup_query_count ?
1509 br->multicast_startup_query_interval :
1510 br->multicast_query_interval;
1511 mod_timer(&own_query->timer, time);
1512 }
1513
1514 static void
1515 br_multicast_port_query_expired(struct net_bridge_port *port,
1516 struct bridge_mcast_own_query *query)
1517 {
1518 struct net_bridge *br = port->br;
1519
1520 spin_lock(&br->multicast_lock);
1521 if (port->state == BR_STATE_DISABLED ||
1522 port->state == BR_STATE_BLOCKING)
1523 goto out;
1524
1525 if (query->startup_sent < br->multicast_startup_query_count)
1526 query->startup_sent++;
1527
1528 br_multicast_send_query(port->br, port, query);
1529
1530 out:
1531 spin_unlock(&br->multicast_lock);
1532 }
1533
1534 static void br_ip4_multicast_port_query_expired(struct timer_list *t)
1535 {
1536 struct net_bridge_port *port = from_timer(port, t, ip4_own_query.timer);
1537
1538 br_multicast_port_query_expired(port, &port->ip4_own_query);
1539 }
1540
1541 #if IS_ENABLED(CONFIG_IPV6)
1542 static void br_ip6_multicast_port_query_expired(struct timer_list *t)
1543 {
1544 struct net_bridge_port *port = from_timer(port, t, ip6_own_query.timer);
1545
1546 br_multicast_port_query_expired(port, &port->ip6_own_query);
1547 }
1548 #endif
1549
1550 static void br_multicast_port_group_rexmit(struct timer_list *t)
1551 {
1552 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1553 struct bridge_mcast_other_query *other_query = NULL;
1554 struct net_bridge *br = pg->key.port->br;
1555 bool need_rexmit = false;
1556
1557 spin_lock(&br->multicast_lock);
1558 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
1559 !br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1560 !br_opt_get(br, BROPT_MULTICAST_QUERIER))
1561 goto out;
1562
1563 if (pg->key.addr.proto == htons(ETH_P_IP))
1564 other_query = &br->ip4_other_query;
1565 #if IS_ENABLED(CONFIG_IPV6)
1566 else
1567 other_query = &br->ip6_other_query;
1568 #endif
1569
1570 if (!other_query || timer_pending(&other_query->timer))
1571 goto out;
1572
1573 if (pg->grp_query_rexmit_cnt) {
1574 pg->grp_query_rexmit_cnt--;
1575 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1576 &pg->key.addr, false, 1, NULL);
1577 }
1578 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1579 &pg->key.addr, true, 0, &need_rexmit);
1580
1581 if (pg->grp_query_rexmit_cnt || need_rexmit)
1582 mod_timer(&pg->rexmit_timer, jiffies +
1583 br->multicast_last_member_interval);
1584 out:
1585 spin_unlock(&br->multicast_lock);
1586 }
1587
1588 static void br_mc_disabled_update(struct net_device *dev, bool value)
1589 {
1590 struct switchdev_attr attr = {
1591 .orig_dev = dev,
1592 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1593 .flags = SWITCHDEV_F_DEFER,
1594 .u.mc_disabled = !value,
1595 };
1596
1597 switchdev_port_attr_set(dev, &attr);
1598 }
1599
1600 int br_multicast_add_port(struct net_bridge_port *port)
1601 {
1602 port->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1603
1604 timer_setup(&port->multicast_router_timer,
1605 br_multicast_router_expired, 0);
1606 timer_setup(&port->ip4_own_query.timer,
1607 br_ip4_multicast_port_query_expired, 0);
1608 #if IS_ENABLED(CONFIG_IPV6)
1609 timer_setup(&port->ip6_own_query.timer,
1610 br_ip6_multicast_port_query_expired, 0);
1611 #endif
1612 br_mc_disabled_update(port->dev,
1613 br_opt_get(port->br, BROPT_MULTICAST_ENABLED));
1614
1615 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
1616 if (!port->mcast_stats)
1617 return -ENOMEM;
1618
1619 return 0;
1620 }
1621
1622 void br_multicast_del_port(struct net_bridge_port *port)
1623 {
1624 struct net_bridge *br = port->br;
1625 struct net_bridge_port_group *pg;
1626 HLIST_HEAD(deleted_head);
1627 struct hlist_node *n;
1628
1629 /* Take care of the remaining groups, only perm ones should be left */
1630 spin_lock_bh(&br->multicast_lock);
1631 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
1632 br_multicast_find_del_pg(br, pg);
1633 hlist_move_list(&br->mcast_gc_list, &deleted_head);
1634 spin_unlock_bh(&br->multicast_lock);
1635 br_multicast_gc(&deleted_head);
1636 del_timer_sync(&port->multicast_router_timer);
1637 free_percpu(port->mcast_stats);
1638 }
1639
1640 static void br_multicast_enable(struct bridge_mcast_own_query *query)
1641 {
1642 query->startup_sent = 0;
1643
1644 if (try_to_del_timer_sync(&query->timer) >= 0 ||
1645 del_timer(&query->timer))
1646 mod_timer(&query->timer, jiffies);
1647 }
1648
1649 static void __br_multicast_enable_port(struct net_bridge_port *port)
1650 {
1651 struct net_bridge *br = port->br;
1652
1653 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) || !netif_running(br->dev))
1654 return;
1655
1656 br_multicast_enable(&port->ip4_own_query);
1657 #if IS_ENABLED(CONFIG_IPV6)
1658 br_multicast_enable(&port->ip6_own_query);
1659 #endif
1660 if (port->multicast_router == MDB_RTR_TYPE_PERM &&
1661 hlist_unhashed(&port->rlist))
1662 br_multicast_add_router(br, port);
1663 }
1664
1665 void br_multicast_enable_port(struct net_bridge_port *port)
1666 {
1667 struct net_bridge *br = port->br;
1668
1669 spin_lock(&br->multicast_lock);
1670 __br_multicast_enable_port(port);
1671 spin_unlock(&br->multicast_lock);
1672 }
1673
1674 void br_multicast_disable_port(struct net_bridge_port *port)
1675 {
1676 struct net_bridge *br = port->br;
1677 struct net_bridge_port_group *pg;
1678 struct hlist_node *n;
1679
1680 spin_lock(&br->multicast_lock);
1681 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
1682 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT))
1683 br_multicast_find_del_pg(br, pg);
1684
1685 __del_port_router(port);
1686
1687 del_timer(&port->multicast_router_timer);
1688 del_timer(&port->ip4_own_query.timer);
1689 #if IS_ENABLED(CONFIG_IPV6)
1690 del_timer(&port->ip6_own_query.timer);
1691 #endif
1692 spin_unlock(&br->multicast_lock);
1693 }
1694
1695 static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
1696 {
1697 struct net_bridge_group_src *ent;
1698 struct hlist_node *tmp;
1699 int deleted = 0;
1700
1701 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
1702 if (ent->flags & BR_SGRP_F_DELETE) {
1703 br_multicast_del_group_src(ent);
1704 deleted++;
1705 }
1706
1707 return deleted;
1708 }
1709
1710 static void __grp_src_mod_timer(struct net_bridge_group_src *src,
1711 unsigned long expires)
1712 {
1713 mod_timer(&src->timer, expires);
1714 br_multicast_fwd_src_handle(src);
1715 }
1716
1717 static void __grp_src_query_marked_and_rexmit(struct net_bridge_port_group *pg)
1718 {
1719 struct bridge_mcast_other_query *other_query = NULL;
1720 struct net_bridge *br = pg->key.port->br;
1721 u32 lmqc = br->multicast_last_member_count;
1722 unsigned long lmqt, lmi, now = jiffies;
1723 struct net_bridge_group_src *ent;
1724
1725 if (!netif_running(br->dev) ||
1726 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1727 return;
1728
1729 if (pg->key.addr.proto == htons(ETH_P_IP))
1730 other_query = &br->ip4_other_query;
1731 #if IS_ENABLED(CONFIG_IPV6)
1732 else
1733 other_query = &br->ip6_other_query;
1734 #endif
1735
1736 lmqt = now + br_multicast_lmqt(br);
1737 hlist_for_each_entry(ent, &pg->src_list, node) {
1738 if (ent->flags & BR_SGRP_F_SEND) {
1739 ent->flags &= ~BR_SGRP_F_SEND;
1740 if (ent->timer.expires > lmqt) {
1741 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
1742 other_query &&
1743 !timer_pending(&other_query->timer))
1744 ent->src_query_rexmit_cnt = lmqc;
1745 __grp_src_mod_timer(ent, lmqt);
1746 }
1747 }
1748 }
1749
1750 if (!br_opt_get(br, BROPT_MULTICAST_QUERIER) ||
1751 !other_query || timer_pending(&other_query->timer))
1752 return;
1753
1754 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1755 &pg->key.addr, true, 1, NULL);
1756
1757 lmi = now + br->multicast_last_member_interval;
1758 if (!timer_pending(&pg->rexmit_timer) ||
1759 time_after(pg->rexmit_timer.expires, lmi))
1760 mod_timer(&pg->rexmit_timer, lmi);
1761 }
1762
1763 static void __grp_send_query_and_rexmit(struct net_bridge_port_group *pg)
1764 {
1765 struct bridge_mcast_other_query *other_query = NULL;
1766 struct net_bridge *br = pg->key.port->br;
1767 unsigned long now = jiffies, lmi;
1768
1769 if (!netif_running(br->dev) ||
1770 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1771 return;
1772
1773 if (pg->key.addr.proto == htons(ETH_P_IP))
1774 other_query = &br->ip4_other_query;
1775 #if IS_ENABLED(CONFIG_IPV6)
1776 else
1777 other_query = &br->ip6_other_query;
1778 #endif
1779
1780 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
1781 other_query && !timer_pending(&other_query->timer)) {
1782 lmi = now + br->multicast_last_member_interval;
1783 pg->grp_query_rexmit_cnt = br->multicast_last_member_count - 1;
1784 __br_multicast_send_query(br, pg->key.port, pg, &pg->key.addr,
1785 &pg->key.addr, false, 0, NULL);
1786 if (!timer_pending(&pg->rexmit_timer) ||
1787 time_after(pg->rexmit_timer.expires, lmi))
1788 mod_timer(&pg->rexmit_timer, lmi);
1789 }
1790
1791 if (pg->filter_mode == MCAST_EXCLUDE &&
1792 (!timer_pending(&pg->timer) ||
1793 time_after(pg->timer.expires, now + br_multicast_lmqt(br))))
1794 mod_timer(&pg->timer, now + br_multicast_lmqt(br));
1795 }
1796
1797 /* State Msg type New state Actions
1798 * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
1799 * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
1800 * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
1801 */
1802 static bool br_multicast_isinc_allow(struct net_bridge_port_group *pg,
1803 void *srcs, u32 nsrcs, size_t src_size)
1804 {
1805 struct net_bridge *br = pg->key.port->br;
1806 struct net_bridge_group_src *ent;
1807 unsigned long now = jiffies;
1808 bool changed = false;
1809 struct br_ip src_ip;
1810 u32 src_idx;
1811
1812 memset(&src_ip, 0, sizeof(src_ip));
1813 src_ip.proto = pg->key.addr.proto;
1814 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1815 memcpy(&src_ip.src, srcs, src_size);
1816 ent = br_multicast_find_group_src(pg, &src_ip);
1817 if (!ent) {
1818 ent = br_multicast_new_group_src(pg, &src_ip);
1819 if (ent)
1820 changed = true;
1821 }
1822
1823 if (ent)
1824 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
1825 srcs += src_size;
1826 }
1827
1828 return changed;
1829 }
1830
1831 /* State Msg type New state Actions
1832 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
1833 * Delete (A-B)
1834 * Group Timer=GMI
1835 */
1836 static void __grp_src_isexc_incl(struct net_bridge_port_group *pg,
1837 void *srcs, u32 nsrcs, size_t src_size)
1838 {
1839 struct net_bridge_group_src *ent;
1840 struct br_ip src_ip;
1841 u32 src_idx;
1842
1843 hlist_for_each_entry(ent, &pg->src_list, node)
1844 ent->flags |= BR_SGRP_F_DELETE;
1845
1846 memset(&src_ip, 0, sizeof(src_ip));
1847 src_ip.proto = pg->key.addr.proto;
1848 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1849 memcpy(&src_ip.src, srcs, src_size);
1850 ent = br_multicast_find_group_src(pg, &src_ip);
1851 if (ent)
1852 ent->flags &= ~BR_SGRP_F_DELETE;
1853 else
1854 ent = br_multicast_new_group_src(pg, &src_ip);
1855 if (ent)
1856 br_multicast_fwd_src_handle(ent);
1857 srcs += src_size;
1858 }
1859
1860 __grp_src_delete_marked(pg);
1861 }
1862
1863 /* State Msg type New state Actions
1864 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
1865 * Delete (X-A)
1866 * Delete (Y-A)
1867 * Group Timer=GMI
1868 */
1869 static bool __grp_src_isexc_excl(struct net_bridge_port_group *pg,
1870 void *srcs, u32 nsrcs, size_t src_size)
1871 {
1872 struct net_bridge *br = pg->key.port->br;
1873 struct net_bridge_group_src *ent;
1874 unsigned long now = jiffies;
1875 bool changed = false;
1876 struct br_ip src_ip;
1877 u32 src_idx;
1878
1879 hlist_for_each_entry(ent, &pg->src_list, node)
1880 ent->flags |= BR_SGRP_F_DELETE;
1881
1882 memset(&src_ip, 0, sizeof(src_ip));
1883 src_ip.proto = pg->key.addr.proto;
1884 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1885 memcpy(&src_ip.src, srcs, src_size);
1886 ent = br_multicast_find_group_src(pg, &src_ip);
1887 if (ent) {
1888 ent->flags &= ~BR_SGRP_F_DELETE;
1889 } else {
1890 ent = br_multicast_new_group_src(pg, &src_ip);
1891 if (ent) {
1892 __grp_src_mod_timer(ent,
1893 now + br_multicast_gmi(br));
1894 changed = true;
1895 }
1896 }
1897 srcs += src_size;
1898 }
1899
1900 if (__grp_src_delete_marked(pg))
1901 changed = true;
1902
1903 return changed;
1904 }
1905
1906 static bool br_multicast_isexc(struct net_bridge_port_group *pg,
1907 void *srcs, u32 nsrcs, size_t src_size)
1908 {
1909 struct net_bridge *br = pg->key.port->br;
1910 bool changed = false;
1911
1912 switch (pg->filter_mode) {
1913 case MCAST_INCLUDE:
1914 __grp_src_isexc_incl(pg, srcs, nsrcs, src_size);
1915 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
1916 changed = true;
1917 break;
1918 case MCAST_EXCLUDE:
1919 changed = __grp_src_isexc_excl(pg, srcs, nsrcs, src_size);
1920 break;
1921 }
1922
1923 pg->filter_mode = MCAST_EXCLUDE;
1924 mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
1925
1926 return changed;
1927 }
1928
1929 /* State Msg type New state Actions
1930 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
1931 * Send Q(G,A-B)
1932 */
1933 static bool __grp_src_toin_incl(struct net_bridge_port_group *pg,
1934 void *srcs, u32 nsrcs, size_t src_size)
1935 {
1936 struct net_bridge *br = pg->key.port->br;
1937 u32 src_idx, to_send = pg->src_ents;
1938 struct net_bridge_group_src *ent;
1939 unsigned long now = jiffies;
1940 bool changed = false;
1941 struct br_ip src_ip;
1942
1943 hlist_for_each_entry(ent, &pg->src_list, node)
1944 ent->flags |= BR_SGRP_F_SEND;
1945
1946 memset(&src_ip, 0, sizeof(src_ip));
1947 src_ip.proto = pg->key.addr.proto;
1948 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1949 memcpy(&src_ip.src, srcs, src_size);
1950 ent = br_multicast_find_group_src(pg, &src_ip);
1951 if (ent) {
1952 ent->flags &= ~BR_SGRP_F_SEND;
1953 to_send--;
1954 } else {
1955 ent = br_multicast_new_group_src(pg, &src_ip);
1956 if (ent)
1957 changed = true;
1958 }
1959 if (ent)
1960 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
1961 srcs += src_size;
1962 }
1963
1964 if (to_send)
1965 __grp_src_query_marked_and_rexmit(pg);
1966
1967 return changed;
1968 }
1969
1970 /* State Msg type New state Actions
1971 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
1972 * Send Q(G,X-A)
1973 * Send Q(G)
1974 */
1975 static bool __grp_src_toin_excl(struct net_bridge_port_group *pg,
1976 void *srcs, u32 nsrcs, size_t src_size)
1977 {
1978 struct net_bridge *br = pg->key.port->br;
1979 u32 src_idx, to_send = pg->src_ents;
1980 struct net_bridge_group_src *ent;
1981 unsigned long now = jiffies;
1982 bool changed = false;
1983 struct br_ip src_ip;
1984
1985 hlist_for_each_entry(ent, &pg->src_list, node)
1986 if (timer_pending(&ent->timer))
1987 ent->flags |= BR_SGRP_F_SEND;
1988
1989 memset(&src_ip, 0, sizeof(src_ip));
1990 src_ip.proto = pg->key.addr.proto;
1991 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
1992 memcpy(&src_ip.src, srcs, src_size);
1993 ent = br_multicast_find_group_src(pg, &src_ip);
1994 if (ent) {
1995 if (timer_pending(&ent->timer)) {
1996 ent->flags &= ~BR_SGRP_F_SEND;
1997 to_send--;
1998 }
1999 } else {
2000 ent = br_multicast_new_group_src(pg, &src_ip);
2001 if (ent)
2002 changed = true;
2003 }
2004 if (ent)
2005 __grp_src_mod_timer(ent, now + br_multicast_gmi(br));
2006 srcs += src_size;
2007 }
2008
2009 if (to_send)
2010 __grp_src_query_marked_and_rexmit(pg);
2011
2012 __grp_send_query_and_rexmit(pg);
2013
2014 return changed;
2015 }
2016
2017 static bool br_multicast_toin(struct net_bridge_port_group *pg,
2018 void *srcs, u32 nsrcs, size_t src_size)
2019 {
2020 bool changed = false;
2021
2022 switch (pg->filter_mode) {
2023 case MCAST_INCLUDE:
2024 changed = __grp_src_toin_incl(pg, srcs, nsrcs, src_size);
2025 break;
2026 case MCAST_EXCLUDE:
2027 changed = __grp_src_toin_excl(pg, srcs, nsrcs, src_size);
2028 break;
2029 }
2030
2031 return changed;
2032 }
2033
2034 /* State Msg type New state Actions
2035 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2036 * Delete (A-B)
2037 * Send Q(G,A*B)
2038 * Group Timer=GMI
2039 */
2040 static void __grp_src_toex_incl(struct net_bridge_port_group *pg,
2041 void *srcs, u32 nsrcs, size_t src_size)
2042 {
2043 struct net_bridge_group_src *ent;
2044 u32 src_idx, to_send = 0;
2045 struct br_ip src_ip;
2046
2047 hlist_for_each_entry(ent, &pg->src_list, node)
2048 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2049
2050 memset(&src_ip, 0, sizeof(src_ip));
2051 src_ip.proto = pg->key.addr.proto;
2052 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2053 memcpy(&src_ip.src, srcs, src_size);
2054 ent = br_multicast_find_group_src(pg, &src_ip);
2055 if (ent) {
2056 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2057 BR_SGRP_F_SEND;
2058 to_send++;
2059 } else {
2060 ent = br_multicast_new_group_src(pg, &src_ip);
2061 }
2062 if (ent)
2063 br_multicast_fwd_src_handle(ent);
2064 srcs += src_size;
2065 }
2066
2067 __grp_src_delete_marked(pg);
2068 if (to_send)
2069 __grp_src_query_marked_and_rexmit(pg);
2070 }
2071
2072 /* State Msg type New state Actions
2073 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2074 * Delete (X-A)
2075 * Delete (Y-A)
2076 * Send Q(G,A-Y)
2077 * Group Timer=GMI
2078 */
2079 static bool __grp_src_toex_excl(struct net_bridge_port_group *pg,
2080 void *srcs, u32 nsrcs, size_t src_size)
2081 {
2082 struct net_bridge_group_src *ent;
2083 u32 src_idx, to_send = 0;
2084 bool changed = false;
2085 struct br_ip src_ip;
2086
2087 hlist_for_each_entry(ent, &pg->src_list, node)
2088 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2089
2090 memset(&src_ip, 0, sizeof(src_ip));
2091 src_ip.proto = pg->key.addr.proto;
2092 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2093 memcpy(&src_ip.src, srcs, src_size);
2094 ent = br_multicast_find_group_src(pg, &src_ip);
2095 if (ent) {
2096 ent->flags &= ~BR_SGRP_F_DELETE;
2097 } else {
2098 ent = br_multicast_new_group_src(pg, &src_ip);
2099 if (ent) {
2100 __grp_src_mod_timer(ent, pg->timer.expires);
2101 changed = true;
2102 }
2103 }
2104 if (ent && timer_pending(&ent->timer)) {
2105 ent->flags |= BR_SGRP_F_SEND;
2106 to_send++;
2107 }
2108 srcs += src_size;
2109 }
2110
2111 if (__grp_src_delete_marked(pg))
2112 changed = true;
2113 if (to_send)
2114 __grp_src_query_marked_and_rexmit(pg);
2115
2116 return changed;
2117 }
2118
2119 static bool br_multicast_toex(struct net_bridge_port_group *pg,
2120 void *srcs, u32 nsrcs, size_t src_size)
2121 {
2122 struct net_bridge *br = pg->key.port->br;
2123 bool changed = false;
2124
2125 switch (pg->filter_mode) {
2126 case MCAST_INCLUDE:
2127 __grp_src_toex_incl(pg, srcs, nsrcs, src_size);
2128 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2129 changed = true;
2130 break;
2131 case MCAST_EXCLUDE:
2132 changed = __grp_src_toex_excl(pg, srcs, nsrcs, src_size);
2133 break;
2134 }
2135
2136 pg->filter_mode = MCAST_EXCLUDE;
2137 mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
2138
2139 return changed;
2140 }
2141
2142 /* State Msg type New state Actions
2143 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2144 */
2145 static void __grp_src_block_incl(struct net_bridge_port_group *pg,
2146 void *srcs, u32 nsrcs, size_t src_size)
2147 {
2148 struct net_bridge_group_src *ent;
2149 u32 src_idx, to_send = 0;
2150 struct br_ip src_ip;
2151
2152 hlist_for_each_entry(ent, &pg->src_list, node)
2153 ent->flags &= ~BR_SGRP_F_SEND;
2154
2155 memset(&src_ip, 0, sizeof(src_ip));
2156 src_ip.proto = pg->key.addr.proto;
2157 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2158 memcpy(&src_ip.src, srcs, src_size);
2159 ent = br_multicast_find_group_src(pg, &src_ip);
2160 if (ent) {
2161 ent->flags |= BR_SGRP_F_SEND;
2162 to_send++;
2163 }
2164 srcs += src_size;
2165 }
2166
2167 if (to_send)
2168 __grp_src_query_marked_and_rexmit(pg);
2169
2170 if (pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list))
2171 br_multicast_find_del_pg(pg->key.port->br, pg);
2172 }
2173
2174 /* State Msg type New state Actions
2175 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2176 * Send Q(G,A-Y)
2177 */
2178 static bool __grp_src_block_excl(struct net_bridge_port_group *pg,
2179 void *srcs, u32 nsrcs, size_t src_size)
2180 {
2181 struct net_bridge_group_src *ent;
2182 u32 src_idx, to_send = 0;
2183 bool changed = false;
2184 struct br_ip src_ip;
2185
2186 hlist_for_each_entry(ent, &pg->src_list, node)
2187 ent->flags &= ~BR_SGRP_F_SEND;
2188
2189 memset(&src_ip, 0, sizeof(src_ip));
2190 src_ip.proto = pg->key.addr.proto;
2191 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2192 memcpy(&src_ip.src, srcs, src_size);
2193 ent = br_multicast_find_group_src(pg, &src_ip);
2194 if (!ent) {
2195 ent = br_multicast_new_group_src(pg, &src_ip);
2196 if (ent) {
2197 __grp_src_mod_timer(ent, pg->timer.expires);
2198 changed = true;
2199 }
2200 }
2201 if (ent && timer_pending(&ent->timer)) {
2202 ent->flags |= BR_SGRP_F_SEND;
2203 to_send++;
2204 }
2205 srcs += src_size;
2206 }
2207
2208 if (to_send)
2209 __grp_src_query_marked_and_rexmit(pg);
2210
2211 return changed;
2212 }
2213
2214 static bool br_multicast_block(struct net_bridge_port_group *pg,
2215 void *srcs, u32 nsrcs, size_t src_size)
2216 {
2217 bool changed = false;
2218
2219 switch (pg->filter_mode) {
2220 case MCAST_INCLUDE:
2221 __grp_src_block_incl(pg, srcs, nsrcs, src_size);
2222 break;
2223 case MCAST_EXCLUDE:
2224 changed = __grp_src_block_excl(pg, srcs, nsrcs, src_size);
2225 break;
2226 }
2227
2228 return changed;
2229 }
2230
2231 static struct net_bridge_port_group *
2232 br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2233 struct net_bridge_port *p,
2234 const unsigned char *src)
2235 {
2236 struct net_bridge *br __maybe_unused = mp->br;
2237 struct net_bridge_port_group *pg;
2238
2239 for (pg = mlock_dereference(mp->ports, br);
2240 pg;
2241 pg = mlock_dereference(pg->next, br))
2242 if (br_port_group_equal(pg, p, src))
2243 return pg;
2244
2245 return NULL;
2246 }
2247
2248 static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
2249 struct net_bridge_port *port,
2250 struct sk_buff *skb,
2251 u16 vid)
2252 {
2253 bool igmpv2 = br->multicast_igmp_version == 2;
2254 struct net_bridge_mdb_entry *mdst;
2255 struct net_bridge_port_group *pg;
2256 const unsigned char *src;
2257 struct igmpv3_report *ih;
2258 struct igmpv3_grec *grec;
2259 int i, len, num, type;
2260 bool changed = false;
2261 __be32 group;
2262 int err = 0;
2263 u16 nsrcs;
2264
2265 ih = igmpv3_report_hdr(skb);
2266 num = ntohs(ih->ngrec);
2267 len = skb_transport_offset(skb) + sizeof(*ih);
2268
2269 for (i = 0; i < num; i++) {
2270 len += sizeof(*grec);
2271 if (!ip_mc_may_pull(skb, len))
2272 return -EINVAL;
2273
2274 grec = (void *)(skb->data + len - sizeof(*grec));
2275 group = grec->grec_mca;
2276 type = grec->grec_type;
2277 nsrcs = ntohs(grec->grec_nsrcs);
2278
2279 len += nsrcs * 4;
2280 if (!ip_mc_may_pull(skb, len))
2281 return -EINVAL;
2282
2283 switch (type) {
2284 case IGMPV3_MODE_IS_INCLUDE:
2285 case IGMPV3_MODE_IS_EXCLUDE:
2286 case IGMPV3_CHANGE_TO_INCLUDE:
2287 case IGMPV3_CHANGE_TO_EXCLUDE:
2288 case IGMPV3_ALLOW_NEW_SOURCES:
2289 case IGMPV3_BLOCK_OLD_SOURCES:
2290 break;
2291
2292 default:
2293 continue;
2294 }
2295
2296 src = eth_hdr(skb)->h_source;
2297 if (nsrcs == 0 &&
2298 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2299 type == IGMPV3_MODE_IS_INCLUDE)) {
2300 if (!port || igmpv2) {
2301 br_ip4_multicast_leave_group(br, port, group, vid, src);
2302 continue;
2303 }
2304 } else {
2305 err = br_ip4_multicast_add_group(br, port, group, vid,
2306 src, igmpv2);
2307 if (err)
2308 break;
2309 }
2310
2311 if (!port || igmpv2)
2312 continue;
2313
2314 spin_lock_bh(&br->multicast_lock);
2315 mdst = br_mdb_ip4_get(br, group, vid);
2316 if (!mdst)
2317 goto unlock_continue;
2318 pg = br_multicast_find_port(mdst, port, src);
2319 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2320 goto unlock_continue;
2321 /* reload grec */
2322 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
2323 switch (type) {
2324 case IGMPV3_ALLOW_NEW_SOURCES:
2325 changed = br_multicast_isinc_allow(pg, grec->grec_src,
2326 nsrcs, sizeof(__be32));
2327 break;
2328 case IGMPV3_MODE_IS_INCLUDE:
2329 changed = br_multicast_isinc_allow(pg, grec->grec_src, nsrcs,
2330 sizeof(__be32));
2331 break;
2332 case IGMPV3_MODE_IS_EXCLUDE:
2333 changed = br_multicast_isexc(pg, grec->grec_src, nsrcs,
2334 sizeof(__be32));
2335 break;
2336 case IGMPV3_CHANGE_TO_INCLUDE:
2337 changed = br_multicast_toin(pg, grec->grec_src, nsrcs,
2338 sizeof(__be32));
2339 break;
2340 case IGMPV3_CHANGE_TO_EXCLUDE:
2341 changed = br_multicast_toex(pg, grec->grec_src, nsrcs,
2342 sizeof(__be32));
2343 break;
2344 case IGMPV3_BLOCK_OLD_SOURCES:
2345 changed = br_multicast_block(pg, grec->grec_src, nsrcs,
2346 sizeof(__be32));
2347 break;
2348 }
2349 if (changed)
2350 br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
2351 unlock_continue:
2352 spin_unlock_bh(&br->multicast_lock);
2353 }
2354
2355 return err;
2356 }
2357
2358 #if IS_ENABLED(CONFIG_IPV6)
2359 static int br_ip6_multicast_mld2_report(struct net_bridge *br,
2360 struct net_bridge_port *port,
2361 struct sk_buff *skb,
2362 u16 vid)
2363 {
2364 bool mldv1 = br->multicast_mld_version == 1;
2365 struct net_bridge_mdb_entry *mdst;
2366 struct net_bridge_port_group *pg;
2367 unsigned int nsrcs_offset;
2368 const unsigned char *src;
2369 struct icmp6hdr *icmp6h;
2370 struct mld2_grec *grec;
2371 unsigned int grec_len;
2372 bool changed = false;
2373 int i, len, num;
2374 int err = 0;
2375
2376 if (!ipv6_mc_may_pull(skb, sizeof(*icmp6h)))
2377 return -EINVAL;
2378
2379 icmp6h = icmp6_hdr(skb);
2380 num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
2381 len = skb_transport_offset(skb) + sizeof(*icmp6h);
2382
2383 for (i = 0; i < num; i++) {
2384 __be16 *_nsrcs, __nsrcs;
2385 u16 nsrcs;
2386
2387 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2388
2389 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
2390 nsrcs_offset + sizeof(__nsrcs))
2391 return -EINVAL;
2392
2393 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2394 sizeof(__nsrcs), &__nsrcs);
2395 if (!_nsrcs)
2396 return -EINVAL;
2397
2398 nsrcs = ntohs(*_nsrcs);
2399 grec_len = struct_size(grec, grec_src, nsrcs);
2400
2401 if (!ipv6_mc_may_pull(skb, len + grec_len))
2402 return -EINVAL;
2403
2404 grec = (struct mld2_grec *)(skb->data + len);
2405 len += grec_len;
2406
2407 switch (grec->grec_type) {
2408 case MLD2_MODE_IS_INCLUDE:
2409 case MLD2_MODE_IS_EXCLUDE:
2410 case MLD2_CHANGE_TO_INCLUDE:
2411 case MLD2_CHANGE_TO_EXCLUDE:
2412 case MLD2_ALLOW_NEW_SOURCES:
2413 case MLD2_BLOCK_OLD_SOURCES:
2414 break;
2415
2416 default:
2417 continue;
2418 }
2419
2420 src = eth_hdr(skb)->h_source;
2421 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2422 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
2423 nsrcs == 0) {
2424 if (!port || mldv1) {
2425 br_ip6_multicast_leave_group(br, port,
2426 &grec->grec_mca,
2427 vid, src);
2428 continue;
2429 }
2430 } else {
2431 err = br_ip6_multicast_add_group(br, port,
2432 &grec->grec_mca, vid,
2433 src, mldv1);
2434 if (err)
2435 break;
2436 }
2437
2438 if (!port || mldv1)
2439 continue;
2440
2441 spin_lock_bh(&br->multicast_lock);
2442 mdst = br_mdb_ip6_get(br, &grec->grec_mca, vid);
2443 if (!mdst)
2444 goto unlock_continue;
2445 pg = br_multicast_find_port(mdst, port, src);
2446 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2447 goto unlock_continue;
2448 switch (grec->grec_type) {
2449 case MLD2_ALLOW_NEW_SOURCES:
2450 changed = br_multicast_isinc_allow(pg, grec->grec_src,
2451 nsrcs,
2452 sizeof(struct in6_addr));
2453 break;
2454 case MLD2_MODE_IS_INCLUDE:
2455 changed = br_multicast_isinc_allow(pg, grec->grec_src, nsrcs,
2456 sizeof(struct in6_addr));
2457 break;
2458 case MLD2_MODE_IS_EXCLUDE:
2459 changed = br_multicast_isexc(pg, grec->grec_src, nsrcs,
2460 sizeof(struct in6_addr));
2461 break;
2462 case MLD2_CHANGE_TO_INCLUDE:
2463 changed = br_multicast_toin(pg, grec->grec_src, nsrcs,
2464 sizeof(struct in6_addr));
2465 break;
2466 case MLD2_CHANGE_TO_EXCLUDE:
2467 changed = br_multicast_toex(pg, grec->grec_src, nsrcs,
2468 sizeof(struct in6_addr));
2469 break;
2470 case MLD2_BLOCK_OLD_SOURCES:
2471 changed = br_multicast_block(pg, grec->grec_src, nsrcs,
2472 sizeof(struct in6_addr));
2473 break;
2474 }
2475 if (changed)
2476 br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
2477 unlock_continue:
2478 spin_unlock_bh(&br->multicast_lock);
2479 }
2480
2481 return err;
2482 }
2483 #endif
2484
2485 static bool br_ip4_multicast_select_querier(struct net_bridge *br,
2486 struct net_bridge_port *port,
2487 __be32 saddr)
2488 {
2489 if (!timer_pending(&br->ip4_own_query.timer) &&
2490 !timer_pending(&br->ip4_other_query.timer))
2491 goto update;
2492
2493 if (!br->ip4_querier.addr.src.ip4)
2494 goto update;
2495
2496 if (ntohl(saddr) <= ntohl(br->ip4_querier.addr.src.ip4))
2497 goto update;
2498
2499 return false;
2500
2501 update:
2502 br->ip4_querier.addr.src.ip4 = saddr;
2503
2504 /* update protected by general multicast_lock by caller */
2505 rcu_assign_pointer(br->ip4_querier.port, port);
2506
2507 return true;
2508 }
2509
2510 #if IS_ENABLED(CONFIG_IPV6)
2511 static bool br_ip6_multicast_select_querier(struct net_bridge *br,
2512 struct net_bridge_port *port,
2513 struct in6_addr *saddr)
2514 {
2515 if (!timer_pending(&br->ip6_own_query.timer) &&
2516 !timer_pending(&br->ip6_other_query.timer))
2517 goto update;
2518
2519 if (ipv6_addr_cmp(saddr, &br->ip6_querier.addr.src.ip6) <= 0)
2520 goto update;
2521
2522 return false;
2523
2524 update:
2525 br->ip6_querier.addr.src.ip6 = *saddr;
2526
2527 /* update protected by general multicast_lock by caller */
2528 rcu_assign_pointer(br->ip6_querier.port, port);
2529
2530 return true;
2531 }
2532 #endif
2533
2534 static bool br_multicast_select_querier(struct net_bridge *br,
2535 struct net_bridge_port *port,
2536 struct br_ip *saddr)
2537 {
2538 switch (saddr->proto) {
2539 case htons(ETH_P_IP):
2540 return br_ip4_multicast_select_querier(br, port, saddr->src.ip4);
2541 #if IS_ENABLED(CONFIG_IPV6)
2542 case htons(ETH_P_IPV6):
2543 return br_ip6_multicast_select_querier(br, port, &saddr->src.ip6);
2544 #endif
2545 }
2546
2547 return false;
2548 }
2549
2550 static void
2551 br_multicast_update_query_timer(struct net_bridge *br,
2552 struct bridge_mcast_other_query *query,
2553 unsigned long max_delay)
2554 {
2555 if (!timer_pending(&query->timer))
2556 query->delay_time = jiffies + max_delay;
2557
2558 mod_timer(&query->timer, jiffies + br->multicast_querier_interval);
2559 }
2560
2561 static void br_port_mc_router_state_change(struct net_bridge_port *p,
2562 bool is_mc_router)
2563 {
2564 struct switchdev_attr attr = {
2565 .orig_dev = p->dev,
2566 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
2567 .flags = SWITCHDEV_F_DEFER,
2568 .u.mrouter = is_mc_router,
2569 };
2570
2571 switchdev_port_attr_set(p->dev, &attr);
2572 }
2573
2574 /*
2575 * Add port to router_list
2576 * list is maintained ordered by pointer value
2577 * and locked by br->multicast_lock and RCU
2578 */
2579 static void br_multicast_add_router(struct net_bridge *br,
2580 struct net_bridge_port *port)
2581 {
2582 struct net_bridge_port *p;
2583 struct hlist_node *slot = NULL;
2584
2585 if (!hlist_unhashed(&port->rlist))
2586 return;
2587
2588 hlist_for_each_entry(p, &br->router_list, rlist) {
2589 if ((unsigned long) port >= (unsigned long) p)
2590 break;
2591 slot = &p->rlist;
2592 }
2593
2594 if (slot)
2595 hlist_add_behind_rcu(&port->rlist, slot);
2596 else
2597 hlist_add_head_rcu(&port->rlist, &br->router_list);
2598 br_rtr_notify(br->dev, port, RTM_NEWMDB);
2599 br_port_mc_router_state_change(port, true);
2600 }
2601
2602 static void br_multicast_mark_router(struct net_bridge *br,
2603 struct net_bridge_port *port)
2604 {
2605 unsigned long now = jiffies;
2606
2607 if (!port) {
2608 if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
2609 if (!timer_pending(&br->multicast_router_timer))
2610 br_mc_router_state_change(br, true);
2611 mod_timer(&br->multicast_router_timer,
2612 now + br->multicast_querier_interval);
2613 }
2614 return;
2615 }
2616
2617 if (port->multicast_router == MDB_RTR_TYPE_DISABLED ||
2618 port->multicast_router == MDB_RTR_TYPE_PERM)
2619 return;
2620
2621 br_multicast_add_router(br, port);
2622
2623 mod_timer(&port->multicast_router_timer,
2624 now + br->multicast_querier_interval);
2625 }
2626
2627 static void br_multicast_query_received(struct net_bridge *br,
2628 struct net_bridge_port *port,
2629 struct bridge_mcast_other_query *query,
2630 struct br_ip *saddr,
2631 unsigned long max_delay)
2632 {
2633 if (!br_multicast_select_querier(br, port, saddr))
2634 return;
2635
2636 br_multicast_update_query_timer(br, query, max_delay);
2637 br_multicast_mark_router(br, port);
2638 }
2639
2640 static void br_ip4_multicast_query(struct net_bridge *br,
2641 struct net_bridge_port *port,
2642 struct sk_buff *skb,
2643 u16 vid)
2644 {
2645 unsigned int transport_len = ip_transport_len(skb);
2646 const struct iphdr *iph = ip_hdr(skb);
2647 struct igmphdr *ih = igmp_hdr(skb);
2648 struct net_bridge_mdb_entry *mp;
2649 struct igmpv3_query *ih3;
2650 struct net_bridge_port_group *p;
2651 struct net_bridge_port_group __rcu **pp;
2652 struct br_ip saddr;
2653 unsigned long max_delay;
2654 unsigned long now = jiffies;
2655 __be32 group;
2656
2657 spin_lock(&br->multicast_lock);
2658 if (!netif_running(br->dev) ||
2659 (port && port->state == BR_STATE_DISABLED))
2660 goto out;
2661
2662 group = ih->group;
2663
2664 if (transport_len == sizeof(*ih)) {
2665 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
2666
2667 if (!max_delay) {
2668 max_delay = 10 * HZ;
2669 group = 0;
2670 }
2671 } else if (transport_len >= sizeof(*ih3)) {
2672 ih3 = igmpv3_query_hdr(skb);
2673 if (ih3->nsrcs ||
2674 (br->multicast_igmp_version == 3 && group && ih3->suppress))
2675 goto out;
2676
2677 max_delay = ih3->code ?
2678 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
2679 } else {
2680 goto out;
2681 }
2682
2683 if (!group) {
2684 saddr.proto = htons(ETH_P_IP);
2685 saddr.src.ip4 = iph->saddr;
2686
2687 br_multicast_query_received(br, port, &br->ip4_other_query,
2688 &saddr, max_delay);
2689 goto out;
2690 }
2691
2692 mp = br_mdb_ip4_get(br, group, vid);
2693 if (!mp)
2694 goto out;
2695
2696 max_delay *= br->multicast_last_member_count;
2697
2698 if (mp->host_joined &&
2699 (timer_pending(&mp->timer) ?
2700 time_after(mp->timer.expires, now + max_delay) :
2701 try_to_del_timer_sync(&mp->timer) >= 0))
2702 mod_timer(&mp->timer, now + max_delay);
2703
2704 for (pp = &mp->ports;
2705 (p = mlock_dereference(*pp, br)) != NULL;
2706 pp = &p->next) {
2707 if (timer_pending(&p->timer) ?
2708 time_after(p->timer.expires, now + max_delay) :
2709 try_to_del_timer_sync(&p->timer) >= 0 &&
2710 (br->multicast_igmp_version == 2 ||
2711 p->filter_mode == MCAST_EXCLUDE))
2712 mod_timer(&p->timer, now + max_delay);
2713 }
2714
2715 out:
2716 spin_unlock(&br->multicast_lock);
2717 }
2718
2719 #if IS_ENABLED(CONFIG_IPV6)
2720 static int br_ip6_multicast_query(struct net_bridge *br,
2721 struct net_bridge_port *port,
2722 struct sk_buff *skb,
2723 u16 vid)
2724 {
2725 unsigned int transport_len = ipv6_transport_len(skb);
2726 struct mld_msg *mld;
2727 struct net_bridge_mdb_entry *mp;
2728 struct mld2_query *mld2q;
2729 struct net_bridge_port_group *p;
2730 struct net_bridge_port_group __rcu **pp;
2731 struct br_ip saddr;
2732 unsigned long max_delay;
2733 unsigned long now = jiffies;
2734 unsigned int offset = skb_transport_offset(skb);
2735 const struct in6_addr *group = NULL;
2736 bool is_general_query;
2737 int err = 0;
2738
2739 spin_lock(&br->multicast_lock);
2740 if (!netif_running(br->dev) ||
2741 (port && port->state == BR_STATE_DISABLED))
2742 goto out;
2743
2744 if (transport_len == sizeof(*mld)) {
2745 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
2746 err = -EINVAL;
2747 goto out;
2748 }
2749 mld = (struct mld_msg *) icmp6_hdr(skb);
2750 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
2751 if (max_delay)
2752 group = &mld->mld_mca;
2753 } else {
2754 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
2755 err = -EINVAL;
2756 goto out;
2757 }
2758 mld2q = (struct mld2_query *)icmp6_hdr(skb);
2759 if (!mld2q->mld2q_nsrcs)
2760 group = &mld2q->mld2q_mca;
2761 if (br->multicast_mld_version == 2 &&
2762 !ipv6_addr_any(&mld2q->mld2q_mca) &&
2763 mld2q->mld2q_suppress)
2764 goto out;
2765
2766 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
2767 }
2768
2769 is_general_query = group && ipv6_addr_any(group);
2770
2771 if (is_general_query) {
2772 saddr.proto = htons(ETH_P_IPV6);
2773 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
2774
2775 br_multicast_query_received(br, port, &br->ip6_other_query,
2776 &saddr, max_delay);
2777 goto out;
2778 } else if (!group) {
2779 goto out;
2780 }
2781
2782 mp = br_mdb_ip6_get(br, group, vid);
2783 if (!mp)
2784 goto out;
2785
2786 max_delay *= br->multicast_last_member_count;
2787 if (mp->host_joined &&
2788 (timer_pending(&mp->timer) ?
2789 time_after(mp->timer.expires, now + max_delay) :
2790 try_to_del_timer_sync(&mp->timer) >= 0))
2791 mod_timer(&mp->timer, now + max_delay);
2792
2793 for (pp = &mp->ports;
2794 (p = mlock_dereference(*pp, br)) != NULL;
2795 pp = &p->next) {
2796 if (timer_pending(&p->timer) ?
2797 time_after(p->timer.expires, now + max_delay) :
2798 try_to_del_timer_sync(&p->timer) >= 0 &&
2799 (br->multicast_mld_version == 1 ||
2800 p->filter_mode == MCAST_EXCLUDE))
2801 mod_timer(&p->timer, now + max_delay);
2802 }
2803
2804 out:
2805 spin_unlock(&br->multicast_lock);
2806 return err;
2807 }
2808 #endif
2809
2810 static void
2811 br_multicast_leave_group(struct net_bridge *br,
2812 struct net_bridge_port *port,
2813 struct br_ip *group,
2814 struct bridge_mcast_other_query *other_query,
2815 struct bridge_mcast_own_query *own_query,
2816 const unsigned char *src)
2817 {
2818 struct net_bridge_mdb_entry *mp;
2819 struct net_bridge_port_group *p;
2820 unsigned long now;
2821 unsigned long time;
2822
2823 spin_lock(&br->multicast_lock);
2824 if (!netif_running(br->dev) ||
2825 (port && port->state == BR_STATE_DISABLED))
2826 goto out;
2827
2828 mp = br_mdb_ip_get(br, group);
2829 if (!mp)
2830 goto out;
2831
2832 if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
2833 struct net_bridge_port_group __rcu **pp;
2834
2835 for (pp = &mp->ports;
2836 (p = mlock_dereference(*pp, br)) != NULL;
2837 pp = &p->next) {
2838 if (!br_port_group_equal(p, port, src))
2839 continue;
2840
2841 if (p->flags & MDB_PG_FLAGS_PERMANENT)
2842 break;
2843
2844 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2845 br_multicast_del_pg(mp, p, pp);
2846 }
2847 goto out;
2848 }
2849
2850 if (timer_pending(&other_query->timer))
2851 goto out;
2852
2853 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
2854 __br_multicast_send_query(br, port, NULL, NULL, &mp->addr,
2855 false, 0, NULL);
2856
2857 time = jiffies + br->multicast_last_member_count *
2858 br->multicast_last_member_interval;
2859
2860 mod_timer(&own_query->timer, time);
2861
2862 for (p = mlock_dereference(mp->ports, br);
2863 p != NULL;
2864 p = mlock_dereference(p->next, br)) {
2865 if (!br_port_group_equal(p, port, src))
2866 continue;
2867
2868 if (!hlist_unhashed(&p->mglist) &&
2869 (timer_pending(&p->timer) ?
2870 time_after(p->timer.expires, time) :
2871 try_to_del_timer_sync(&p->timer) >= 0)) {
2872 mod_timer(&p->timer, time);
2873 }
2874
2875 break;
2876 }
2877 }
2878
2879 now = jiffies;
2880 time = now + br->multicast_last_member_count *
2881 br->multicast_last_member_interval;
2882
2883 if (!port) {
2884 if (mp->host_joined &&
2885 (timer_pending(&mp->timer) ?
2886 time_after(mp->timer.expires, time) :
2887 try_to_del_timer_sync(&mp->timer) >= 0)) {
2888 mod_timer(&mp->timer, time);
2889 }
2890
2891 goto out;
2892 }
2893
2894 for (p = mlock_dereference(mp->ports, br);
2895 p != NULL;
2896 p = mlock_dereference(p->next, br)) {
2897 if (p->key.port != port)
2898 continue;
2899
2900 if (!hlist_unhashed(&p->mglist) &&
2901 (timer_pending(&p->timer) ?
2902 time_after(p->timer.expires, time) :
2903 try_to_del_timer_sync(&p->timer) >= 0)) {
2904 mod_timer(&p->timer, time);
2905 }
2906
2907 break;
2908 }
2909 out:
2910 spin_unlock(&br->multicast_lock);
2911 }
2912
2913 static void br_ip4_multicast_leave_group(struct net_bridge *br,
2914 struct net_bridge_port *port,
2915 __be32 group,
2916 __u16 vid,
2917 const unsigned char *src)
2918 {
2919 struct br_ip br_group;
2920 struct bridge_mcast_own_query *own_query;
2921
2922 if (ipv4_is_local_multicast(group))
2923 return;
2924
2925 own_query = port ? &port->ip4_own_query : &br->ip4_own_query;
2926
2927 memset(&br_group, 0, sizeof(br_group));
2928 br_group.dst.ip4 = group;
2929 br_group.proto = htons(ETH_P_IP);
2930 br_group.vid = vid;
2931
2932 br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
2933 own_query, src);
2934 }
2935
2936 #if IS_ENABLED(CONFIG_IPV6)
2937 static void br_ip6_multicast_leave_group(struct net_bridge *br,
2938 struct net_bridge_port *port,
2939 const struct in6_addr *group,
2940 __u16 vid,
2941 const unsigned char *src)
2942 {
2943 struct br_ip br_group;
2944 struct bridge_mcast_own_query *own_query;
2945
2946 if (ipv6_addr_is_ll_all_nodes(group))
2947 return;
2948
2949 own_query = port ? &port->ip6_own_query : &br->ip6_own_query;
2950
2951 memset(&br_group, 0, sizeof(br_group));
2952 br_group.dst.ip6 = *group;
2953 br_group.proto = htons(ETH_P_IPV6);
2954 br_group.vid = vid;
2955
2956 br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
2957 own_query, src);
2958 }
2959 #endif
2960
2961 static void br_multicast_err_count(const struct net_bridge *br,
2962 const struct net_bridge_port *p,
2963 __be16 proto)
2964 {
2965 struct bridge_mcast_stats __percpu *stats;
2966 struct bridge_mcast_stats *pstats;
2967
2968 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
2969 return;
2970
2971 if (p)
2972 stats = p->mcast_stats;
2973 else
2974 stats = br->mcast_stats;
2975 if (WARN_ON(!stats))
2976 return;
2977
2978 pstats = this_cpu_ptr(stats);
2979
2980 u64_stats_update_begin(&pstats->syncp);
2981 switch (proto) {
2982 case htons(ETH_P_IP):
2983 pstats->mstats.igmp_parse_errors++;
2984 break;
2985 #if IS_ENABLED(CONFIG_IPV6)
2986 case htons(ETH_P_IPV6):
2987 pstats->mstats.mld_parse_errors++;
2988 break;
2989 #endif
2990 }
2991 u64_stats_update_end(&pstats->syncp);
2992 }
2993
2994 static void br_multicast_pim(struct net_bridge *br,
2995 struct net_bridge_port *port,
2996 const struct sk_buff *skb)
2997 {
2998 unsigned int offset = skb_transport_offset(skb);
2999 struct pimhdr *pimhdr, _pimhdr;
3000
3001 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
3002 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
3003 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
3004 return;
3005
3006 br_multicast_mark_router(br, port);
3007 }
3008
3009 static int br_ip4_multicast_mrd_rcv(struct net_bridge *br,
3010 struct net_bridge_port *port,
3011 struct sk_buff *skb)
3012 {
3013 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3014 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3015 return -ENOMSG;
3016
3017 br_multicast_mark_router(br, port);
3018
3019 return 0;
3020 }
3021
3022 static int br_multicast_ipv4_rcv(struct net_bridge *br,
3023 struct net_bridge_port *port,
3024 struct sk_buff *skb,
3025 u16 vid)
3026 {
3027 const unsigned char *src;
3028 struct igmphdr *ih;
3029 int err;
3030
3031 err = ip_mc_check_igmp(skb);
3032
3033 if (err == -ENOMSG) {
3034 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
3035 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3036 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3037 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
3038 br_multicast_pim(br, port, skb);
3039 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
3040 br_ip4_multicast_mrd_rcv(br, port, skb);
3041 }
3042
3043 return 0;
3044 } else if (err < 0) {
3045 br_multicast_err_count(br, port, skb->protocol);
3046 return err;
3047 }
3048
3049 ih = igmp_hdr(skb);
3050 src = eth_hdr(skb)->h_source;
3051 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
3052
3053 switch (ih->type) {
3054 case IGMP_HOST_MEMBERSHIP_REPORT:
3055 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3056 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3057 err = br_ip4_multicast_add_group(br, port, ih->group, vid, src,
3058 true);
3059 break;
3060 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3061 err = br_ip4_multicast_igmp3_report(br, port, skb, vid);
3062 break;
3063 case IGMP_HOST_MEMBERSHIP_QUERY:
3064 br_ip4_multicast_query(br, port, skb, vid);
3065 break;
3066 case IGMP_HOST_LEAVE_MESSAGE:
3067 br_ip4_multicast_leave_group(br, port, ih->group, vid, src);
3068 break;
3069 }
3070
3071 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
3072 BR_MCAST_DIR_RX);
3073
3074 return err;
3075 }
3076
3077 #if IS_ENABLED(CONFIG_IPV6)
3078 static int br_ip6_multicast_mrd_rcv(struct net_bridge *br,
3079 struct net_bridge_port *port,
3080 struct sk_buff *skb)
3081 {
3082 int ret;
3083
3084 if (ipv6_hdr(skb)->nexthdr != IPPROTO_ICMPV6)
3085 return -ENOMSG;
3086
3087 ret = ipv6_mc_check_icmpv6(skb);
3088 if (ret < 0)
3089 return ret;
3090
3091 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
3092 return -ENOMSG;
3093
3094 br_multicast_mark_router(br, port);
3095
3096 return 0;
3097 }
3098
3099 static int br_multicast_ipv6_rcv(struct net_bridge *br,
3100 struct net_bridge_port *port,
3101 struct sk_buff *skb,
3102 u16 vid)
3103 {
3104 const unsigned char *src;
3105 struct mld_msg *mld;
3106 int err;
3107
3108 err = ipv6_mc_check_mld(skb);
3109
3110 if (err == -ENOMSG) {
3111 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3112 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3113
3114 if (ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr)) {
3115 err = br_ip6_multicast_mrd_rcv(br, port, skb);
3116
3117 if (err < 0 && err != -ENOMSG) {
3118 br_multicast_err_count(br, port, skb->protocol);
3119 return err;
3120 }
3121 }
3122
3123 return 0;
3124 } else if (err < 0) {
3125 br_multicast_err_count(br, port, skb->protocol);
3126 return err;
3127 }
3128
3129 mld = (struct mld_msg *)skb_transport_header(skb);
3130 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
3131
3132 switch (mld->mld_type) {
3133 case ICMPV6_MGM_REPORT:
3134 src = eth_hdr(skb)->h_source;
3135 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3136 err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid,
3137 src, true);
3138 break;
3139 case ICMPV6_MLD2_REPORT:
3140 err = br_ip6_multicast_mld2_report(br, port, skb, vid);
3141 break;
3142 case ICMPV6_MGM_QUERY:
3143 err = br_ip6_multicast_query(br, port, skb, vid);
3144 break;
3145 case ICMPV6_MGM_REDUCTION:
3146 src = eth_hdr(skb)->h_source;
3147 br_ip6_multicast_leave_group(br, port, &mld->mld_mca, vid, src);
3148 break;
3149 }
3150
3151 br_multicast_count(br, port, skb, BR_INPUT_SKB_CB(skb)->igmp,
3152 BR_MCAST_DIR_RX);
3153
3154 return err;
3155 }
3156 #endif
3157
3158 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
3159 struct sk_buff *skb, u16 vid)
3160 {
3161 int ret = 0;
3162
3163 BR_INPUT_SKB_CB(skb)->igmp = 0;
3164 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3165
3166 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
3167 return 0;
3168
3169 switch (skb->protocol) {
3170 case htons(ETH_P_IP):
3171 ret = br_multicast_ipv4_rcv(br, port, skb, vid);
3172 break;
3173 #if IS_ENABLED(CONFIG_IPV6)
3174 case htons(ETH_P_IPV6):
3175 ret = br_multicast_ipv6_rcv(br, port, skb, vid);
3176 break;
3177 #endif
3178 }
3179
3180 return ret;
3181 }
3182
3183 static void br_multicast_query_expired(struct net_bridge *br,
3184 struct bridge_mcast_own_query *query,
3185 struct bridge_mcast_querier *querier)
3186 {
3187 spin_lock(&br->multicast_lock);
3188 if (query->startup_sent < br->multicast_startup_query_count)
3189 query->startup_sent++;
3190
3191 RCU_INIT_POINTER(querier->port, NULL);
3192 br_multicast_send_query(br, NULL, query);
3193 spin_unlock(&br->multicast_lock);
3194 }
3195
3196 static void br_ip4_multicast_query_expired(struct timer_list *t)
3197 {
3198 struct net_bridge *br = from_timer(br, t, ip4_own_query.timer);
3199
3200 br_multicast_query_expired(br, &br->ip4_own_query, &br->ip4_querier);
3201 }
3202
3203 #if IS_ENABLED(CONFIG_IPV6)
3204 static void br_ip6_multicast_query_expired(struct timer_list *t)
3205 {
3206 struct net_bridge *br = from_timer(br, t, ip6_own_query.timer);
3207
3208 br_multicast_query_expired(br, &br->ip6_own_query, &br->ip6_querier);
3209 }
3210 #endif
3211
3212 static void br_multicast_gc_work(struct work_struct *work)
3213 {
3214 struct net_bridge *br = container_of(work, struct net_bridge,
3215 mcast_gc_work);
3216 HLIST_HEAD(deleted_head);
3217
3218 spin_lock_bh(&br->multicast_lock);
3219 hlist_move_list(&br->mcast_gc_list, &deleted_head);
3220 spin_unlock_bh(&br->multicast_lock);
3221
3222 br_multicast_gc(&deleted_head);
3223 }
3224
3225 void br_multicast_init(struct net_bridge *br)
3226 {
3227 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
3228
3229 br->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3230 br->multicast_last_member_count = 2;
3231 br->multicast_startup_query_count = 2;
3232
3233 br->multicast_last_member_interval = HZ;
3234 br->multicast_query_response_interval = 10 * HZ;
3235 br->multicast_startup_query_interval = 125 * HZ / 4;
3236 br->multicast_query_interval = 125 * HZ;
3237 br->multicast_querier_interval = 255 * HZ;
3238 br->multicast_membership_interval = 260 * HZ;
3239
3240 br->ip4_other_query.delay_time = 0;
3241 br->ip4_querier.port = NULL;
3242 br->multicast_igmp_version = 2;
3243 #if IS_ENABLED(CONFIG_IPV6)
3244 br->multicast_mld_version = 1;
3245 br->ip6_other_query.delay_time = 0;
3246 br->ip6_querier.port = NULL;
3247 #endif
3248 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
3249 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
3250
3251 spin_lock_init(&br->multicast_lock);
3252 timer_setup(&br->multicast_router_timer,
3253 br_multicast_local_router_expired, 0);
3254 timer_setup(&br->ip4_other_query.timer,
3255 br_ip4_multicast_querier_expired, 0);
3256 timer_setup(&br->ip4_own_query.timer,
3257 br_ip4_multicast_query_expired, 0);
3258 #if IS_ENABLED(CONFIG_IPV6)
3259 timer_setup(&br->ip6_other_query.timer,
3260 br_ip6_multicast_querier_expired, 0);
3261 timer_setup(&br->ip6_own_query.timer,
3262 br_ip6_multicast_query_expired, 0);
3263 #endif
3264 INIT_HLIST_HEAD(&br->mdb_list);
3265 INIT_HLIST_HEAD(&br->mcast_gc_list);
3266 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
3267 }
3268
3269 static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
3270 {
3271 struct in_device *in_dev = in_dev_get(br->dev);
3272
3273 if (!in_dev)
3274 return;
3275
3276 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
3277 in_dev_put(in_dev);
3278 }
3279
3280 #if IS_ENABLED(CONFIG_IPV6)
3281 static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3282 {
3283 struct in6_addr addr;
3284
3285 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3286 ipv6_dev_mc_inc(br->dev, &addr);
3287 }
3288 #else
3289 static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3290 {
3291 }
3292 #endif
3293
3294 void br_multicast_join_snoopers(struct net_bridge *br)
3295 {
3296 br_ip4_multicast_join_snoopers(br);
3297 br_ip6_multicast_join_snoopers(br);
3298 }
3299
3300 static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
3301 {
3302 struct in_device *in_dev = in_dev_get(br->dev);
3303
3304 if (WARN_ON(!in_dev))
3305 return;
3306
3307 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
3308 in_dev_put(in_dev);
3309 }
3310
3311 #if IS_ENABLED(CONFIG_IPV6)
3312 static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3313 {
3314 struct in6_addr addr;
3315
3316 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3317 ipv6_dev_mc_dec(br->dev, &addr);
3318 }
3319 #else
3320 static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3321 {
3322 }
3323 #endif
3324
3325 void br_multicast_leave_snoopers(struct net_bridge *br)
3326 {
3327 br_ip4_multicast_leave_snoopers(br);
3328 br_ip6_multicast_leave_snoopers(br);
3329 }
3330
3331 static void __br_multicast_open(struct net_bridge *br,
3332 struct bridge_mcast_own_query *query)
3333 {
3334 query->startup_sent = 0;
3335
3336 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
3337 return;
3338
3339 mod_timer(&query->timer, jiffies);
3340 }
3341
3342 void br_multicast_open(struct net_bridge *br)
3343 {
3344 __br_multicast_open(br, &br->ip4_own_query);
3345 #if IS_ENABLED(CONFIG_IPV6)
3346 __br_multicast_open(br, &br->ip6_own_query);
3347 #endif
3348 }
3349
3350 void br_multicast_stop(struct net_bridge *br)
3351 {
3352 del_timer_sync(&br->multicast_router_timer);
3353 del_timer_sync(&br->ip4_other_query.timer);
3354 del_timer_sync(&br->ip4_own_query.timer);
3355 #if IS_ENABLED(CONFIG_IPV6)
3356 del_timer_sync(&br->ip6_other_query.timer);
3357 del_timer_sync(&br->ip6_own_query.timer);
3358 #endif
3359 }
3360
3361 void br_multicast_dev_del(struct net_bridge *br)
3362 {
3363 struct net_bridge_mdb_entry *mp;
3364 HLIST_HEAD(deleted_head);
3365 struct hlist_node *tmp;
3366
3367 spin_lock_bh(&br->multicast_lock);
3368 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
3369 br_multicast_del_mdb_entry(mp);
3370 hlist_move_list(&br->mcast_gc_list, &deleted_head);
3371 spin_unlock_bh(&br->multicast_lock);
3372
3373 br_multicast_gc(&deleted_head);
3374 cancel_work_sync(&br->mcast_gc_work);
3375
3376 rcu_barrier();
3377 }
3378
3379 int br_multicast_set_router(struct net_bridge *br, unsigned long val)
3380 {
3381 int err = -EINVAL;
3382
3383 spin_lock_bh(&br->multicast_lock);
3384
3385 switch (val) {
3386 case MDB_RTR_TYPE_DISABLED:
3387 case MDB_RTR_TYPE_PERM:
3388 br_mc_router_state_change(br, val == MDB_RTR_TYPE_PERM);
3389 del_timer(&br->multicast_router_timer);
3390 br->multicast_router = val;
3391 err = 0;
3392 break;
3393 case MDB_RTR_TYPE_TEMP_QUERY:
3394 if (br->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
3395 br_mc_router_state_change(br, false);
3396 br->multicast_router = val;
3397 err = 0;
3398 break;
3399 }
3400
3401 spin_unlock_bh(&br->multicast_lock);
3402
3403 return err;
3404 }
3405
3406 static void __del_port_router(struct net_bridge_port *p)
3407 {
3408 if (hlist_unhashed(&p->rlist))
3409 return;
3410 hlist_del_init_rcu(&p->rlist);
3411 br_rtr_notify(p->br->dev, p, RTM_DELMDB);
3412 br_port_mc_router_state_change(p, false);
3413
3414 /* don't allow timer refresh */
3415 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
3416 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3417 }
3418
3419 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val)
3420 {
3421 struct net_bridge *br = p->br;
3422 unsigned long now = jiffies;
3423 int err = -EINVAL;
3424
3425 spin_lock(&br->multicast_lock);
3426 if (p->multicast_router == val) {
3427 /* Refresh the temp router port timer */
3428 if (p->multicast_router == MDB_RTR_TYPE_TEMP)
3429 mod_timer(&p->multicast_router_timer,
3430 now + br->multicast_querier_interval);
3431 err = 0;
3432 goto unlock;
3433 }
3434 switch (val) {
3435 case MDB_RTR_TYPE_DISABLED:
3436 p->multicast_router = MDB_RTR_TYPE_DISABLED;
3437 __del_port_router(p);
3438 del_timer(&p->multicast_router_timer);
3439 break;
3440 case MDB_RTR_TYPE_TEMP_QUERY:
3441 p->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3442 __del_port_router(p);
3443 break;
3444 case MDB_RTR_TYPE_PERM:
3445 p->multicast_router = MDB_RTR_TYPE_PERM;
3446 del_timer(&p->multicast_router_timer);
3447 br_multicast_add_router(br, p);
3448 break;
3449 case MDB_RTR_TYPE_TEMP:
3450 p->multicast_router = MDB_RTR_TYPE_TEMP;
3451 br_multicast_mark_router(br, p);
3452 break;
3453 default:
3454 goto unlock;
3455 }
3456 err = 0;
3457 unlock:
3458 spin_unlock(&br->multicast_lock);
3459
3460 return err;
3461 }
3462
3463 static void br_multicast_start_querier(struct net_bridge *br,
3464 struct bridge_mcast_own_query *query)
3465 {
3466 struct net_bridge_port *port;
3467
3468 __br_multicast_open(br, query);
3469
3470 rcu_read_lock();
3471 list_for_each_entry_rcu(port, &br->port_list, list) {
3472 if (port->state == BR_STATE_DISABLED ||
3473 port->state == BR_STATE_BLOCKING)
3474 continue;
3475
3476 if (query == &br->ip4_own_query)
3477 br_multicast_enable(&port->ip4_own_query);
3478 #if IS_ENABLED(CONFIG_IPV6)
3479 else
3480 br_multicast_enable(&port->ip6_own_query);
3481 #endif
3482 }
3483 rcu_read_unlock();
3484 }
3485
3486 int br_multicast_toggle(struct net_bridge *br, unsigned long val)
3487 {
3488 struct net_bridge_port *port;
3489 bool change_snoopers = false;
3490
3491 spin_lock_bh(&br->multicast_lock);
3492 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
3493 goto unlock;
3494
3495 br_mc_disabled_update(br->dev, val);
3496 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
3497 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
3498 change_snoopers = true;
3499 goto unlock;
3500 }
3501
3502 if (!netif_running(br->dev))
3503 goto unlock;
3504
3505 br_multicast_open(br);
3506 list_for_each_entry(port, &br->port_list, list)
3507 __br_multicast_enable_port(port);
3508
3509 change_snoopers = true;
3510
3511 unlock:
3512 spin_unlock_bh(&br->multicast_lock);
3513
3514 /* br_multicast_join_snoopers has the potential to cause
3515 * an MLD Report/Leave to be delivered to br_multicast_rcv,
3516 * which would in turn call br_multicast_add_group, which would
3517 * attempt to acquire multicast_lock. This function should be
3518 * called after the lock has been released to avoid deadlocks on
3519 * multicast_lock.
3520 *
3521 * br_multicast_leave_snoopers does not have the problem since
3522 * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
3523 * returns without calling br_multicast_ipv4/6_rcv if it's not
3524 * enabled. Moved both functions out just for symmetry.
3525 */
3526 if (change_snoopers) {
3527 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
3528 br_multicast_join_snoopers(br);
3529 else
3530 br_multicast_leave_snoopers(br);
3531 }
3532
3533 return 0;
3534 }
3535
3536 bool br_multicast_enabled(const struct net_device *dev)
3537 {
3538 struct net_bridge *br = netdev_priv(dev);
3539
3540 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
3541 }
3542 EXPORT_SYMBOL_GPL(br_multicast_enabled);
3543
3544 bool br_multicast_router(const struct net_device *dev)
3545 {
3546 struct net_bridge *br = netdev_priv(dev);
3547 bool is_router;
3548
3549 spin_lock_bh(&br->multicast_lock);
3550 is_router = br_multicast_is_router(br);
3551 spin_unlock_bh(&br->multicast_lock);
3552 return is_router;
3553 }
3554 EXPORT_SYMBOL_GPL(br_multicast_router);
3555
3556 int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
3557 {
3558 unsigned long max_delay;
3559
3560 val = !!val;
3561
3562 spin_lock_bh(&br->multicast_lock);
3563 if (br_opt_get(br, BROPT_MULTICAST_QUERIER) == val)
3564 goto unlock;
3565
3566 br_opt_toggle(br, BROPT_MULTICAST_QUERIER, !!val);
3567 if (!val)
3568 goto unlock;
3569
3570 max_delay = br->multicast_query_response_interval;
3571
3572 if (!timer_pending(&br->ip4_other_query.timer))
3573 br->ip4_other_query.delay_time = jiffies + max_delay;
3574
3575 br_multicast_start_querier(br, &br->ip4_own_query);
3576
3577 #if IS_ENABLED(CONFIG_IPV6)
3578 if (!timer_pending(&br->ip6_other_query.timer))
3579 br->ip6_other_query.delay_time = jiffies + max_delay;
3580
3581 br_multicast_start_querier(br, &br->ip6_own_query);
3582 #endif
3583
3584 unlock:
3585 spin_unlock_bh(&br->multicast_lock);
3586
3587 return 0;
3588 }
3589
3590 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val)
3591 {
3592 /* Currently we support only version 2 and 3 */
3593 switch (val) {
3594 case 2:
3595 case 3:
3596 break;
3597 default:
3598 return -EINVAL;
3599 }
3600
3601 spin_lock_bh(&br->multicast_lock);
3602 br->multicast_igmp_version = val;
3603 spin_unlock_bh(&br->multicast_lock);
3604
3605 return 0;
3606 }
3607
3608 #if IS_ENABLED(CONFIG_IPV6)
3609 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val)
3610 {
3611 /* Currently we support version 1 and 2 */
3612 switch (val) {
3613 case 1:
3614 case 2:
3615 break;
3616 default:
3617 return -EINVAL;
3618 }
3619
3620 spin_lock_bh(&br->multicast_lock);
3621 br->multicast_mld_version = val;
3622 spin_unlock_bh(&br->multicast_lock);
3623
3624 return 0;
3625 }
3626 #endif
3627
3628 /**
3629 * br_multicast_list_adjacent - Returns snooped multicast addresses
3630 * @dev: The bridge port adjacent to which to retrieve addresses
3631 * @br_ip_list: The list to store found, snooped multicast IP addresses in
3632 *
3633 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
3634 * snooping feature on all bridge ports of dev's bridge device, excluding
3635 * the addresses from dev itself.
3636 *
3637 * Returns the number of items added to br_ip_list.
3638 *
3639 * Notes:
3640 * - br_ip_list needs to be initialized by caller
3641 * - br_ip_list might contain duplicates in the end
3642 * (needs to be taken care of by caller)
3643 * - br_ip_list needs to be freed by caller
3644 */
3645 int br_multicast_list_adjacent(struct net_device *dev,
3646 struct list_head *br_ip_list)
3647 {
3648 struct net_bridge *br;
3649 struct net_bridge_port *port;
3650 struct net_bridge_port_group *group;
3651 struct br_ip_list *entry;
3652 int count = 0;
3653
3654 rcu_read_lock();
3655 if (!br_ip_list || !netif_is_bridge_port(dev))
3656 goto unlock;
3657
3658 port = br_port_get_rcu(dev);
3659 if (!port || !port->br)
3660 goto unlock;
3661
3662 br = port->br;
3663
3664 list_for_each_entry_rcu(port, &br->port_list, list) {
3665 if (!port->dev || port->dev == dev)
3666 continue;
3667
3668 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
3669 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3670 if (!entry)
3671 goto unlock;
3672
3673 entry->addr = group->key.addr;
3674 list_add(&entry->list, br_ip_list);
3675 count++;
3676 }
3677 }
3678
3679 unlock:
3680 rcu_read_unlock();
3681 return count;
3682 }
3683 EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
3684
3685 /**
3686 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
3687 * @dev: The bridge port providing the bridge on which to check for a querier
3688 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
3689 *
3690 * Checks whether the given interface has a bridge on top and if so returns
3691 * true if a valid querier exists anywhere on the bridged link layer.
3692 * Otherwise returns false.
3693 */
3694 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
3695 {
3696 struct net_bridge *br;
3697 struct net_bridge_port *port;
3698 struct ethhdr eth;
3699 bool ret = false;
3700
3701 rcu_read_lock();
3702 if (!netif_is_bridge_port(dev))
3703 goto unlock;
3704
3705 port = br_port_get_rcu(dev);
3706 if (!port || !port->br)
3707 goto unlock;
3708
3709 br = port->br;
3710
3711 memset(&eth, 0, sizeof(eth));
3712 eth.h_proto = htons(proto);
3713
3714 ret = br_multicast_querier_exists(br, &eth, NULL);
3715
3716 unlock:
3717 rcu_read_unlock();
3718 return ret;
3719 }
3720 EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
3721
3722 /**
3723 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
3724 * @dev: The bridge port adjacent to which to check for a querier
3725 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
3726 *
3727 * Checks whether the given interface has a bridge on top and if so returns
3728 * true if a selected querier is behind one of the other ports of this
3729 * bridge. Otherwise returns false.
3730 */
3731 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
3732 {
3733 struct net_bridge *br;
3734 struct net_bridge_port *port;
3735 bool ret = false;
3736
3737 rcu_read_lock();
3738 if (!netif_is_bridge_port(dev))
3739 goto unlock;
3740
3741 port = br_port_get_rcu(dev);
3742 if (!port || !port->br)
3743 goto unlock;
3744
3745 br = port->br;
3746
3747 switch (proto) {
3748 case ETH_P_IP:
3749 if (!timer_pending(&br->ip4_other_query.timer) ||
3750 rcu_dereference(br->ip4_querier.port) == port)
3751 goto unlock;
3752 break;
3753 #if IS_ENABLED(CONFIG_IPV6)
3754 case ETH_P_IPV6:
3755 if (!timer_pending(&br->ip6_other_query.timer) ||
3756 rcu_dereference(br->ip6_querier.port) == port)
3757 goto unlock;
3758 break;
3759 #endif
3760 default:
3761 goto unlock;
3762 }
3763
3764 ret = true;
3765 unlock:
3766 rcu_read_unlock();
3767 return ret;
3768 }
3769 EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
3770
3771 static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
3772 const struct sk_buff *skb, u8 type, u8 dir)
3773 {
3774 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
3775 __be16 proto = skb->protocol;
3776 unsigned int t_len;
3777
3778 u64_stats_update_begin(&pstats->syncp);
3779 switch (proto) {
3780 case htons(ETH_P_IP):
3781 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
3782 switch (type) {
3783 case IGMP_HOST_MEMBERSHIP_REPORT:
3784 pstats->mstats.igmp_v1reports[dir]++;
3785 break;
3786 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3787 pstats->mstats.igmp_v2reports[dir]++;
3788 break;
3789 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3790 pstats->mstats.igmp_v3reports[dir]++;
3791 break;
3792 case IGMP_HOST_MEMBERSHIP_QUERY:
3793 if (t_len != sizeof(struct igmphdr)) {
3794 pstats->mstats.igmp_v3queries[dir]++;
3795 } else {
3796 unsigned int offset = skb_transport_offset(skb);
3797 struct igmphdr *ih, _ihdr;
3798
3799 ih = skb_header_pointer(skb, offset,
3800 sizeof(_ihdr), &_ihdr);
3801 if (!ih)
3802 break;
3803 if (!ih->code)
3804 pstats->mstats.igmp_v1queries[dir]++;
3805 else
3806 pstats->mstats.igmp_v2queries[dir]++;
3807 }
3808 break;
3809 case IGMP_HOST_LEAVE_MESSAGE:
3810 pstats->mstats.igmp_leaves[dir]++;
3811 break;
3812 }
3813 break;
3814 #if IS_ENABLED(CONFIG_IPV6)
3815 case htons(ETH_P_IPV6):
3816 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
3817 sizeof(struct ipv6hdr);
3818 t_len -= skb_network_header_len(skb);
3819 switch (type) {
3820 case ICMPV6_MGM_REPORT:
3821 pstats->mstats.mld_v1reports[dir]++;
3822 break;
3823 case ICMPV6_MLD2_REPORT:
3824 pstats->mstats.mld_v2reports[dir]++;
3825 break;
3826 case ICMPV6_MGM_QUERY:
3827 if (t_len != sizeof(struct mld_msg))
3828 pstats->mstats.mld_v2queries[dir]++;
3829 else
3830 pstats->mstats.mld_v1queries[dir]++;
3831 break;
3832 case ICMPV6_MGM_REDUCTION:
3833 pstats->mstats.mld_leaves[dir]++;
3834 break;
3835 }
3836 break;
3837 #endif /* CONFIG_IPV6 */
3838 }
3839 u64_stats_update_end(&pstats->syncp);
3840 }
3841
3842 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
3843 const struct sk_buff *skb, u8 type, u8 dir)
3844 {
3845 struct bridge_mcast_stats __percpu *stats;
3846
3847 /* if multicast_disabled is true then igmp type can't be set */
3848 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
3849 return;
3850
3851 if (p)
3852 stats = p->mcast_stats;
3853 else
3854 stats = br->mcast_stats;
3855 if (WARN_ON(!stats))
3856 return;
3857
3858 br_mcast_stats_add(stats, skb, type, dir);
3859 }
3860
3861 int br_multicast_init_stats(struct net_bridge *br)
3862 {
3863 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
3864 if (!br->mcast_stats)
3865 return -ENOMEM;
3866
3867 return 0;
3868 }
3869
3870 void br_multicast_uninit_stats(struct net_bridge *br)
3871 {
3872 free_percpu(br->mcast_stats);
3873 }
3874
3875 /* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
3876 static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
3877 {
3878 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
3879 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
3880 }
3881
3882 void br_multicast_get_stats(const struct net_bridge *br,
3883 const struct net_bridge_port *p,
3884 struct br_mcast_stats *dest)
3885 {
3886 struct bridge_mcast_stats __percpu *stats;
3887 struct br_mcast_stats tdst;
3888 int i;
3889
3890 memset(dest, 0, sizeof(*dest));
3891 if (p)
3892 stats = p->mcast_stats;
3893 else
3894 stats = br->mcast_stats;
3895 if (WARN_ON(!stats))
3896 return;
3897
3898 memset(&tdst, 0, sizeof(tdst));
3899 for_each_possible_cpu(i) {
3900 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
3901 struct br_mcast_stats temp;
3902 unsigned int start;
3903
3904 do {
3905 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
3906 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
3907 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
3908
3909 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
3910 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
3911 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
3912 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
3913 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
3914 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
3915 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
3916 tdst.igmp_parse_errors += temp.igmp_parse_errors;
3917
3918 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
3919 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
3920 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
3921 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
3922 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
3923 tdst.mld_parse_errors += temp.mld_parse_errors;
3924 }
3925 memcpy(dest, &tdst, sizeof(*dest));
3926 }
3927
3928 int br_mdb_hash_init(struct net_bridge *br)
3929 {
3930 int err;
3931
3932 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
3933 if (err)
3934 return err;
3935
3936 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
3937 if (err) {
3938 rhashtable_destroy(&br->sg_port_tbl);
3939 return err;
3940 }
3941
3942 return 0;
3943 }
3944
3945 void br_mdb_hash_fini(struct net_bridge *br)
3946 {
3947 rhashtable_destroy(&br->sg_port_tbl);
3948 rhashtable_destroy(&br->mdb_hash_tbl);
3949 }
Linux with added FPC-III support