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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#include <trace/events/bridge.h>
35
36#include "br_private.h"
37#include "br_private_mcast_eht.h"
38
39static const struct rhashtable_params br_mdb_rht_params = {
40 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
41 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
42 .key_len = sizeof(struct br_ip),
43 .automatic_shrinking = true,
44};
45
46static const struct rhashtable_params br_sg_port_rht_params = {
47 .head_offset = offsetof(struct net_bridge_port_group, rhnode),
48 .key_offset = offsetof(struct net_bridge_port_group, key),
49 .key_len = sizeof(struct net_bridge_port_group_sg_key),
50 .automatic_shrinking = true,
51};
52
53static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
54 struct bridge_mcast_own_query *query);
55static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
56 struct net_bridge_mcast_port *pmctx);
57static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
58 struct net_bridge_mcast_port *pmctx,
59 __be32 group,
60 __u16 vid,
61 const unsigned char *src);
62static void br_multicast_port_group_rexmit(struct timer_list *t);
63
64static void
65br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted);
66static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
67 struct net_bridge_mcast_port *pmctx);
68#if IS_ENABLED(CONFIG_IPV6)
69static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
70 struct net_bridge_mcast_port *pmctx,
71 const struct in6_addr *group,
72 __u16 vid, const unsigned char *src);
73#endif
74static struct net_bridge_port_group *
75__br_multicast_add_group(struct net_bridge_mcast *brmctx,
76 struct net_bridge_mcast_port *pmctx,
77 struct br_ip *group,
78 const unsigned char *src,
79 u8 filter_mode,
80 bool igmpv2_mldv1,
81 bool blocked);
82static void br_multicast_find_del_pg(struct net_bridge *br,
83 struct net_bridge_port_group *pg);
84static void __br_multicast_stop(struct net_bridge_mcast *brmctx);
85
86static int br_mc_disabled_update(struct net_device *dev, bool value,
87 struct netlink_ext_ack *extack);
88
89static struct net_bridge_port_group *
90br_sg_port_find(struct net_bridge *br,
91 struct net_bridge_port_group_sg_key *sg_p)
92{
93 lockdep_assert_held_once(&br->multicast_lock);
94
95 return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
96 br_sg_port_rht_params);
97}
98
99static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
100 struct br_ip *dst)
101{
102 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
103}
104
105struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
106 struct br_ip *dst)
107{
108 struct net_bridge_mdb_entry *ent;
109
110 lockdep_assert_held_once(&br->multicast_lock);
111
112 rcu_read_lock();
113 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
114 rcu_read_unlock();
115
116 return ent;
117}
118
119static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
120 __be32 dst, __u16 vid)
121{
122 struct br_ip br_dst;
123
124 memset(&br_dst, 0, sizeof(br_dst));
125 br_dst.dst.ip4 = dst;
126 br_dst.proto = htons(ETH_P_IP);
127 br_dst.vid = vid;
128
129 return br_mdb_ip_get(br, &br_dst);
130}
131
132#if IS_ENABLED(CONFIG_IPV6)
133static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
134 const struct in6_addr *dst,
135 __u16 vid)
136{
137 struct br_ip br_dst;
138
139 memset(&br_dst, 0, sizeof(br_dst));
140 br_dst.dst.ip6 = *dst;
141 br_dst.proto = htons(ETH_P_IPV6);
142 br_dst.vid = vid;
143
144 return br_mdb_ip_get(br, &br_dst);
145}
146#endif
147
148struct net_bridge_mdb_entry *
149br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
150 u16 vid)
151{
152 struct net_bridge *br = brmctx->br;
153 struct br_ip ip;
154
155 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
156 br_multicast_ctx_vlan_global_disabled(brmctx))
157 return NULL;
158
159 if (BR_INPUT_SKB_CB(skb)->igmp)
160 return NULL;
161
162 memset(&ip, 0, sizeof(ip));
163 ip.proto = skb->protocol;
164 ip.vid = vid;
165
166 switch (skb->protocol) {
167 case htons(ETH_P_IP):
168 ip.dst.ip4 = ip_hdr(skb)->daddr;
169 if (brmctx->multicast_igmp_version == 3) {
170 struct net_bridge_mdb_entry *mdb;
171
172 ip.src.ip4 = ip_hdr(skb)->saddr;
173 mdb = br_mdb_ip_get_rcu(br, &ip);
174 if (mdb)
175 return mdb;
176 ip.src.ip4 = 0;
177 }
178 break;
179#if IS_ENABLED(CONFIG_IPV6)
180 case htons(ETH_P_IPV6):
181 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
182 if (brmctx->multicast_mld_version == 2) {
183 struct net_bridge_mdb_entry *mdb;
184
185 ip.src.ip6 = ipv6_hdr(skb)->saddr;
186 mdb = br_mdb_ip_get_rcu(br, &ip);
187 if (mdb)
188 return mdb;
189 memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
190 }
191 break;
192#endif
193 default:
194 ip.proto = 0;
195 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
196 }
197
198 return br_mdb_ip_get_rcu(br, &ip);
199}
200
201/* IMPORTANT: this function must be used only when the contexts cannot be
202 * passed down (e.g. timer) and must be used for read-only purposes because
203 * the vlan snooping option can change, so it can return any context
204 * (non-vlan or vlan). Its initial intended purpose is to read timer values
205 * from the *current* context based on the option. At worst that could lead
206 * to inconsistent timers when the contexts are changed, i.e. src timer
207 * which needs to re-arm with a specific delay taken from the old context
208 */
209static struct net_bridge_mcast_port *
210br_multicast_pg_to_port_ctx(const struct net_bridge_port_group *pg)
211{
212 struct net_bridge_mcast_port *pmctx = &pg->key.port->multicast_ctx;
213 struct net_bridge_vlan *vlan;
214
215 lockdep_assert_held_once(&pg->key.port->br->multicast_lock);
216
217 /* if vlan snooping is disabled use the port's multicast context */
218 if (!pg->key.addr.vid ||
219 !br_opt_get(pg->key.port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED))
220 goto out;
221
222 /* locking is tricky here, due to different rules for multicast and
223 * vlans we need to take rcu to find the vlan and make sure it has
224 * the BR_VLFLAG_MCAST_ENABLED flag set, it can only change under
225 * multicast_lock which must be already held here, so the vlan's pmctx
226 * can safely be used on return
227 */
228 rcu_read_lock();
229 vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid);
230 if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx))
231 pmctx = &vlan->port_mcast_ctx;
232 else
233 pmctx = NULL;
234 rcu_read_unlock();
235out:
236 return pmctx;
237}
238
239static struct net_bridge_mcast_port *
240br_multicast_port_vid_to_port_ctx(struct net_bridge_port *port, u16 vid)
241{
242 struct net_bridge_mcast_port *pmctx = NULL;
243 struct net_bridge_vlan *vlan;
244
245 lockdep_assert_held_once(&port->br->multicast_lock);
246
247 if (!br_opt_get(port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED))
248 return NULL;
249
250 /* Take RCU to access the vlan. */
251 rcu_read_lock();
252
253 vlan = br_vlan_find(nbp_vlan_group_rcu(port), vid);
254 if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx))
255 pmctx = &vlan->port_mcast_ctx;
256
257 rcu_read_unlock();
258
259 return pmctx;
260}
261
262/* when snooping we need to check if the contexts should be used
263 * in the following order:
264 * - if pmctx is non-NULL (port), check if it should be used
265 * - if pmctx is NULL (bridge), check if brmctx should be used
266 */
267static bool
268br_multicast_ctx_should_use(const struct net_bridge_mcast *brmctx,
269 const struct net_bridge_mcast_port *pmctx)
270{
271 if (!netif_running(brmctx->br->dev))
272 return false;
273
274 if (pmctx)
275 return !br_multicast_port_ctx_state_disabled(pmctx);
276 else
277 return !br_multicast_ctx_vlan_disabled(brmctx);
278}
279
280static bool br_port_group_equal(struct net_bridge_port_group *p,
281 struct net_bridge_port *port,
282 const unsigned char *src)
283{
284 if (p->key.port != port)
285 return false;
286
287 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
288 return true;
289
290 return ether_addr_equal(src, p->eth_addr);
291}
292
293static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx,
294 struct net_bridge_port_group *pg,
295 struct br_ip *sg_ip)
296{
297 struct net_bridge_port_group_sg_key sg_key;
298 struct net_bridge_port_group *src_pg;
299 struct net_bridge_mcast *brmctx;
300
301 memset(&sg_key, 0, sizeof(sg_key));
302 brmctx = br_multicast_port_ctx_get_global(pmctx);
303 sg_key.port = pg->key.port;
304 sg_key.addr = *sg_ip;
305 if (br_sg_port_find(brmctx->br, &sg_key))
306 return;
307
308 src_pg = __br_multicast_add_group(brmctx, pmctx,
309 sg_ip, pg->eth_addr,
310 MCAST_INCLUDE, false, false);
311 if (IS_ERR_OR_NULL(src_pg) ||
312 src_pg->rt_protocol != RTPROT_KERNEL)
313 return;
314
315 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
316}
317
318static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
319 struct br_ip *sg_ip)
320{
321 struct net_bridge_port_group_sg_key sg_key;
322 struct net_bridge *br = pg->key.port->br;
323 struct net_bridge_port_group *src_pg;
324
325 memset(&sg_key, 0, sizeof(sg_key));
326 sg_key.port = pg->key.port;
327 sg_key.addr = *sg_ip;
328 src_pg = br_sg_port_find(br, &sg_key);
329 if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
330 src_pg->rt_protocol != RTPROT_KERNEL)
331 return;
332
333 br_multicast_find_del_pg(br, src_pg);
334}
335
336/* When a port group transitions to (or is added as) EXCLUDE we need to add it
337 * to all other ports' S,G entries which are not blocked by the current group
338 * for proper replication, the assumption is that any S,G blocked entries
339 * are already added so the S,G,port lookup should skip them.
340 * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
341 * deleted we need to remove it from all ports' S,G entries where it was
342 * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
343 */
344void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
345 u8 filter_mode)
346{
347 struct net_bridge *br = pg->key.port->br;
348 struct net_bridge_port_group *pg_lst;
349 struct net_bridge_mcast_port *pmctx;
350 struct net_bridge_mdb_entry *mp;
351 struct br_ip sg_ip;
352
353 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
354 return;
355
356 mp = br_mdb_ip_get(br, &pg->key.addr);
357 if (!mp)
358 return;
359 pmctx = br_multicast_pg_to_port_ctx(pg);
360 if (!pmctx)
361 return;
362
363 memset(&sg_ip, 0, sizeof(sg_ip));
364 sg_ip = pg->key.addr;
365
366 for (pg_lst = mlock_dereference(mp->ports, br);
367 pg_lst;
368 pg_lst = mlock_dereference(pg_lst->next, br)) {
369 struct net_bridge_group_src *src_ent;
370
371 if (pg_lst == pg)
372 continue;
373 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
374 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
375 continue;
376 sg_ip.src = src_ent->addr.src;
377 switch (filter_mode) {
378 case MCAST_INCLUDE:
379 __fwd_del_star_excl(pg, &sg_ip);
380 break;
381 case MCAST_EXCLUDE:
382 __fwd_add_star_excl(pmctx, pg, &sg_ip);
383 break;
384 }
385 }
386 }
387}
388
389/* called when adding a new S,G with host_joined == false by default */
390static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
391 struct net_bridge_port_group *sg)
392{
393 struct net_bridge_mdb_entry *sg_mp;
394
395 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
396 return;
397 if (!star_mp->host_joined)
398 return;
399
400 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
401 if (!sg_mp)
402 return;
403 sg_mp->host_joined = true;
404}
405
406/* set the host_joined state of all of *,G's S,G entries */
407static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
408{
409 struct net_bridge *br = star_mp->br;
410 struct net_bridge_mdb_entry *sg_mp;
411 struct net_bridge_port_group *pg;
412 struct br_ip sg_ip;
413
414 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
415 return;
416
417 memset(&sg_ip, 0, sizeof(sg_ip));
418 sg_ip = star_mp->addr;
419 for (pg = mlock_dereference(star_mp->ports, br);
420 pg;
421 pg = mlock_dereference(pg->next, br)) {
422 struct net_bridge_group_src *src_ent;
423
424 hlist_for_each_entry(src_ent, &pg->src_list, node) {
425 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
426 continue;
427 sg_ip.src = src_ent->addr.src;
428 sg_mp = br_mdb_ip_get(br, &sg_ip);
429 if (!sg_mp)
430 continue;
431 sg_mp->host_joined = star_mp->host_joined;
432 }
433 }
434}
435
436static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
437{
438 struct net_bridge_port_group __rcu **pp;
439 struct net_bridge_port_group *p;
440
441 /* *,G exclude ports are only added to S,G entries */
442 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
443 return;
444
445 /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
446 * we should ignore perm entries since they're managed by user-space
447 */
448 for (pp = &sgmp->ports;
449 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
450 pp = &p->next)
451 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
452 MDB_PG_FLAGS_PERMANENT)))
453 return;
454
455 /* currently the host can only have joined the *,G which means
456 * we treat it as EXCLUDE {}, so for an S,G it's considered a
457 * STAR_EXCLUDE entry and we can safely leave it
458 */
459 sgmp->host_joined = false;
460
461 for (pp = &sgmp->ports;
462 (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
463 if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
464 br_multicast_del_pg(sgmp, p, pp);
465 else
466 pp = &p->next;
467 }
468}
469
470void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
471 struct net_bridge_port_group *sg)
472{
473 struct net_bridge_port_group_sg_key sg_key;
474 struct net_bridge *br = star_mp->br;
475 struct net_bridge_mcast_port *pmctx;
476 struct net_bridge_port_group *pg;
477 struct net_bridge_mcast *brmctx;
478
479 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
480 return;
481 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
482 return;
483
484 br_multicast_sg_host_state(star_mp, sg);
485 memset(&sg_key, 0, sizeof(sg_key));
486 sg_key.addr = sg->key.addr;
487 /* we need to add all exclude ports to the S,G */
488 for (pg = mlock_dereference(star_mp->ports, br);
489 pg;
490 pg = mlock_dereference(pg->next, br)) {
491 struct net_bridge_port_group *src_pg;
492
493 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
494 continue;
495
496 sg_key.port = pg->key.port;
497 if (br_sg_port_find(br, &sg_key))
498 continue;
499
500 pmctx = br_multicast_pg_to_port_ctx(pg);
501 if (!pmctx)
502 continue;
503 brmctx = br_multicast_port_ctx_get_global(pmctx);
504
505 src_pg = __br_multicast_add_group(brmctx, pmctx,
506 &sg->key.addr,
507 sg->eth_addr,
508 MCAST_INCLUDE, false, false);
509 if (IS_ERR_OR_NULL(src_pg) ||
510 src_pg->rt_protocol != RTPROT_KERNEL)
511 continue;
512 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
513 }
514}
515
516static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
517{
518 struct net_bridge_mdb_entry *star_mp;
519 struct net_bridge_mcast_port *pmctx;
520 struct net_bridge_port_group *sg;
521 struct net_bridge_mcast *brmctx;
522 struct br_ip sg_ip;
523
524 if (src->flags & BR_SGRP_F_INSTALLED)
525 return;
526
527 memset(&sg_ip, 0, sizeof(sg_ip));
528 pmctx = br_multicast_pg_to_port_ctx(src->pg);
529 if (!pmctx)
530 return;
531 brmctx = br_multicast_port_ctx_get_global(pmctx);
532 sg_ip = src->pg->key.addr;
533 sg_ip.src = src->addr.src;
534
535 sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip,
536 src->pg->eth_addr, MCAST_INCLUDE, false,
537 !timer_pending(&src->timer));
538 if (IS_ERR_OR_NULL(sg))
539 return;
540 src->flags |= BR_SGRP_F_INSTALLED;
541 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
542
543 /* if it was added by user-space as perm we can skip next steps */
544 if (sg->rt_protocol != RTPROT_KERNEL &&
545 (sg->flags & MDB_PG_FLAGS_PERMANENT))
546 return;
547
548 /* the kernel is now responsible for removing this S,G */
549 del_timer(&sg->timer);
550 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
551 if (!star_mp)
552 return;
553
554 br_multicast_sg_add_exclude_ports(star_mp, sg);
555}
556
557static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
558 bool fastleave)
559{
560 struct net_bridge_port_group *p, *pg = src->pg;
561 struct net_bridge_port_group __rcu **pp;
562 struct net_bridge_mdb_entry *mp;
563 struct br_ip sg_ip;
564
565 memset(&sg_ip, 0, sizeof(sg_ip));
566 sg_ip = pg->key.addr;
567 sg_ip.src = src->addr.src;
568
569 mp = br_mdb_ip_get(src->br, &sg_ip);
570 if (!mp)
571 return;
572
573 for (pp = &mp->ports;
574 (p = mlock_dereference(*pp, src->br)) != NULL;
575 pp = &p->next) {
576 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
577 continue;
578
579 if (p->rt_protocol != RTPROT_KERNEL &&
580 (p->flags & MDB_PG_FLAGS_PERMANENT) &&
581 !(src->flags & BR_SGRP_F_USER_ADDED))
582 break;
583
584 if (fastleave)
585 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
586 br_multicast_del_pg(mp, p, pp);
587 break;
588 }
589 src->flags &= ~BR_SGRP_F_INSTALLED;
590}
591
592/* install S,G and based on src's timer enable or disable forwarding */
593static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
594{
595 struct net_bridge_port_group_sg_key sg_key;
596 struct net_bridge_port_group *sg;
597 u8 old_flags;
598
599 br_multicast_fwd_src_add(src);
600
601 memset(&sg_key, 0, sizeof(sg_key));
602 sg_key.addr = src->pg->key.addr;
603 sg_key.addr.src = src->addr.src;
604 sg_key.port = src->pg->key.port;
605
606 sg = br_sg_port_find(src->br, &sg_key);
607 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
608 return;
609
610 old_flags = sg->flags;
611 if (timer_pending(&src->timer))
612 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
613 else
614 sg->flags |= MDB_PG_FLAGS_BLOCKED;
615
616 if (old_flags != sg->flags) {
617 struct net_bridge_mdb_entry *sg_mp;
618
619 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
620 if (!sg_mp)
621 return;
622 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
623 }
624}
625
626static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
627{
628 struct net_bridge_mdb_entry *mp;
629
630 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
631 WARN_ON(!hlist_unhashed(&mp->mdb_node));
632 WARN_ON(mp->ports);
633
634 timer_shutdown_sync(&mp->timer);
635 kfree_rcu(mp, rcu);
636}
637
638static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
639{
640 struct net_bridge *br = mp->br;
641
642 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
643 br_mdb_rht_params);
644 hlist_del_init_rcu(&mp->mdb_node);
645 hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
646 queue_work(system_long_wq, &br->mcast_gc_work);
647}
648
649static void br_multicast_group_expired(struct timer_list *t)
650{
651 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
652 struct net_bridge *br = mp->br;
653
654 spin_lock(&br->multicast_lock);
655 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
656 timer_pending(&mp->timer))
657 goto out;
658
659 br_multicast_host_leave(mp, true);
660
661 if (mp->ports)
662 goto out;
663 br_multicast_del_mdb_entry(mp);
664out:
665 spin_unlock(&br->multicast_lock);
666}
667
668static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
669{
670 struct net_bridge_group_src *src;
671
672 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
673 WARN_ON(!hlist_unhashed(&src->node));
674
675 timer_shutdown_sync(&src->timer);
676 kfree_rcu(src, rcu);
677}
678
679void __br_multicast_del_group_src(struct net_bridge_group_src *src)
680{
681 struct net_bridge *br = src->pg->key.port->br;
682
683 hlist_del_init_rcu(&src->node);
684 src->pg->src_ents--;
685 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
686 queue_work(system_long_wq, &br->mcast_gc_work);
687}
688
689void br_multicast_del_group_src(struct net_bridge_group_src *src,
690 bool fastleave)
691{
692 br_multicast_fwd_src_remove(src, fastleave);
693 __br_multicast_del_group_src(src);
694}
695
696static int
697br_multicast_port_ngroups_inc_one(struct net_bridge_mcast_port *pmctx,
698 struct netlink_ext_ack *extack,
699 const char *what)
700{
701 u32 max = READ_ONCE(pmctx->mdb_max_entries);
702 u32 n = READ_ONCE(pmctx->mdb_n_entries);
703
704 if (max && n >= max) {
705 NL_SET_ERR_MSG_FMT_MOD(extack, "%s is already in %u groups, and mcast_max_groups=%u",
706 what, n, max);
707 return -E2BIG;
708 }
709
710 WRITE_ONCE(pmctx->mdb_n_entries, n + 1);
711 return 0;
712}
713
714static void br_multicast_port_ngroups_dec_one(struct net_bridge_mcast_port *pmctx)
715{
716 u32 n = READ_ONCE(pmctx->mdb_n_entries);
717
718 WARN_ON_ONCE(n == 0);
719 WRITE_ONCE(pmctx->mdb_n_entries, n - 1);
720}
721
722static int br_multicast_port_ngroups_inc(struct net_bridge_port *port,
723 const struct br_ip *group,
724 struct netlink_ext_ack *extack)
725{
726 struct net_bridge_mcast_port *pmctx;
727 int err;
728
729 lockdep_assert_held_once(&port->br->multicast_lock);
730
731 /* Always count on the port context. */
732 err = br_multicast_port_ngroups_inc_one(&port->multicast_ctx, extack,
733 "Port");
734 if (err) {
735 trace_br_mdb_full(port->dev, group);
736 return err;
737 }
738
739 /* Only count on the VLAN context if VID is given, and if snooping on
740 * that VLAN is enabled.
741 */
742 if (!group->vid)
743 return 0;
744
745 pmctx = br_multicast_port_vid_to_port_ctx(port, group->vid);
746 if (!pmctx)
747 return 0;
748
749 err = br_multicast_port_ngroups_inc_one(pmctx, extack, "Port-VLAN");
750 if (err) {
751 trace_br_mdb_full(port->dev, group);
752 goto dec_one_out;
753 }
754
755 return 0;
756
757dec_one_out:
758 br_multicast_port_ngroups_dec_one(&port->multicast_ctx);
759 return err;
760}
761
762static void br_multicast_port_ngroups_dec(struct net_bridge_port *port, u16 vid)
763{
764 struct net_bridge_mcast_port *pmctx;
765
766 lockdep_assert_held_once(&port->br->multicast_lock);
767
768 if (vid) {
769 pmctx = br_multicast_port_vid_to_port_ctx(port, vid);
770 if (pmctx)
771 br_multicast_port_ngroups_dec_one(pmctx);
772 }
773 br_multicast_port_ngroups_dec_one(&port->multicast_ctx);
774}
775
776u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx)
777{
778 return READ_ONCE(pmctx->mdb_n_entries);
779}
780
781void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max)
782{
783 WRITE_ONCE(pmctx->mdb_max_entries, max);
784}
785
786u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx)
787{
788 return READ_ONCE(pmctx->mdb_max_entries);
789}
790
791static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
792{
793 struct net_bridge_port_group *pg;
794
795 pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
796 WARN_ON(!hlist_unhashed(&pg->mglist));
797 WARN_ON(!hlist_empty(&pg->src_list));
798
799 timer_shutdown_sync(&pg->rexmit_timer);
800 timer_shutdown_sync(&pg->timer);
801 kfree_rcu(pg, rcu);
802}
803
804void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
805 struct net_bridge_port_group *pg,
806 struct net_bridge_port_group __rcu **pp)
807{
808 struct net_bridge *br = pg->key.port->br;
809 struct net_bridge_group_src *ent;
810 struct hlist_node *tmp;
811
812 rcu_assign_pointer(*pp, pg->next);
813 hlist_del_init(&pg->mglist);
814 br_multicast_eht_clean_sets(pg);
815 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
816 br_multicast_del_group_src(ent, false);
817 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
818 if (!br_multicast_is_star_g(&mp->addr)) {
819 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
820 br_sg_port_rht_params);
821 br_multicast_sg_del_exclude_ports(mp);
822 } else {
823 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
824 }
825 br_multicast_port_ngroups_dec(pg->key.port, pg->key.addr.vid);
826 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
827 queue_work(system_long_wq, &br->mcast_gc_work);
828
829 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
830 mod_timer(&mp->timer, jiffies);
831}
832
833static void br_multicast_find_del_pg(struct net_bridge *br,
834 struct net_bridge_port_group *pg)
835{
836 struct net_bridge_port_group __rcu **pp;
837 struct net_bridge_mdb_entry *mp;
838 struct net_bridge_port_group *p;
839
840 mp = br_mdb_ip_get(br, &pg->key.addr);
841 if (WARN_ON(!mp))
842 return;
843
844 for (pp = &mp->ports;
845 (p = mlock_dereference(*pp, br)) != NULL;
846 pp = &p->next) {
847 if (p != pg)
848 continue;
849
850 br_multicast_del_pg(mp, pg, pp);
851 return;
852 }
853
854 WARN_ON(1);
855}
856
857static void br_multicast_port_group_expired(struct timer_list *t)
858{
859 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
860 struct net_bridge_group_src *src_ent;
861 struct net_bridge *br = pg->key.port->br;
862 struct hlist_node *tmp;
863 bool changed;
864
865 spin_lock(&br->multicast_lock);
866 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
867 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
868 goto out;
869
870 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
871 pg->filter_mode = MCAST_INCLUDE;
872 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
873 if (!timer_pending(&src_ent->timer)) {
874 br_multicast_del_group_src(src_ent, false);
875 changed = true;
876 }
877 }
878
879 if (hlist_empty(&pg->src_list)) {
880 br_multicast_find_del_pg(br, pg);
881 } else if (changed) {
882 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
883
884 if (changed && br_multicast_is_star_g(&pg->key.addr))
885 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
886
887 if (WARN_ON(!mp))
888 goto out;
889 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
890 }
891out:
892 spin_unlock(&br->multicast_lock);
893}
894
895static void br_multicast_gc(struct hlist_head *head)
896{
897 struct net_bridge_mcast_gc *gcent;
898 struct hlist_node *tmp;
899
900 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
901 hlist_del_init(&gcent->gc_node);
902 gcent->destroy(gcent);
903 }
904}
905
906static void __br_multicast_query_handle_vlan(struct net_bridge_mcast *brmctx,
907 struct net_bridge_mcast_port *pmctx,
908 struct sk_buff *skb)
909{
910 struct net_bridge_vlan *vlan = NULL;
911
912 if (pmctx && br_multicast_port_ctx_is_vlan(pmctx))
913 vlan = pmctx->vlan;
914 else if (br_multicast_ctx_is_vlan(brmctx))
915 vlan = brmctx->vlan;
916
917 if (vlan && !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) {
918 u16 vlan_proto;
919
920 if (br_vlan_get_proto(brmctx->br->dev, &vlan_proto) != 0)
921 return;
922 __vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan->vid);
923 }
924}
925
926static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx,
927 struct net_bridge_mcast_port *pmctx,
928 struct net_bridge_port_group *pg,
929 __be32 ip_dst, __be32 group,
930 bool with_srcs, bool over_lmqt,
931 u8 sflag, u8 *igmp_type,
932 bool *need_rexmit)
933{
934 struct net_bridge_port *p = pg ? pg->key.port : NULL;
935 struct net_bridge_group_src *ent;
936 size_t pkt_size, igmp_hdr_size;
937 unsigned long now = jiffies;
938 struct igmpv3_query *ihv3;
939 void *csum_start = NULL;
940 __sum16 *csum = NULL;
941 struct sk_buff *skb;
942 struct igmphdr *ih;
943 struct ethhdr *eth;
944 unsigned long lmqt;
945 struct iphdr *iph;
946 u16 lmqt_srcs = 0;
947
948 igmp_hdr_size = sizeof(*ih);
949 if (brmctx->multicast_igmp_version == 3) {
950 igmp_hdr_size = sizeof(*ihv3);
951 if (pg && with_srcs) {
952 lmqt = now + (brmctx->multicast_last_member_interval *
953 brmctx->multicast_last_member_count);
954 hlist_for_each_entry(ent, &pg->src_list, node) {
955 if (over_lmqt == time_after(ent->timer.expires,
956 lmqt) &&
957 ent->src_query_rexmit_cnt > 0)
958 lmqt_srcs++;
959 }
960
961 if (!lmqt_srcs)
962 return NULL;
963 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
964 }
965 }
966
967 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
968 if ((p && pkt_size > p->dev->mtu) ||
969 pkt_size > brmctx->br->dev->mtu)
970 return NULL;
971
972 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
973 if (!skb)
974 goto out;
975
976 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
977 skb->protocol = htons(ETH_P_IP);
978
979 skb_reset_mac_header(skb);
980 eth = eth_hdr(skb);
981
982 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
983 ip_eth_mc_map(ip_dst, eth->h_dest);
984 eth->h_proto = htons(ETH_P_IP);
985 skb_put(skb, sizeof(*eth));
986
987 skb_set_network_header(skb, skb->len);
988 iph = ip_hdr(skb);
989 iph->tot_len = htons(pkt_size - sizeof(*eth));
990
991 iph->version = 4;
992 iph->ihl = 6;
993 iph->tos = 0xc0;
994 iph->id = 0;
995 iph->frag_off = htons(IP_DF);
996 iph->ttl = 1;
997 iph->protocol = IPPROTO_IGMP;
998 iph->saddr = br_opt_get(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
999 inet_select_addr(brmctx->br->dev, 0, RT_SCOPE_LINK) : 0;
1000 iph->daddr = ip_dst;
1001 ((u8 *)&iph[1])[0] = IPOPT_RA;
1002 ((u8 *)&iph[1])[1] = 4;
1003 ((u8 *)&iph[1])[2] = 0;
1004 ((u8 *)&iph[1])[3] = 0;
1005 ip_send_check(iph);
1006 skb_put(skb, 24);
1007
1008 skb_set_transport_header(skb, skb->len);
1009 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
1010
1011 switch (brmctx->multicast_igmp_version) {
1012 case 2:
1013 ih = igmp_hdr(skb);
1014 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
1015 ih->code = (group ? brmctx->multicast_last_member_interval :
1016 brmctx->multicast_query_response_interval) /
1017 (HZ / IGMP_TIMER_SCALE);
1018 ih->group = group;
1019 ih->csum = 0;
1020 csum = &ih->csum;
1021 csum_start = (void *)ih;
1022 break;
1023 case 3:
1024 ihv3 = igmpv3_query_hdr(skb);
1025 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
1026 ihv3->code = (group ? brmctx->multicast_last_member_interval :
1027 brmctx->multicast_query_response_interval) /
1028 (HZ / IGMP_TIMER_SCALE);
1029 ihv3->group = group;
1030 ihv3->qqic = brmctx->multicast_query_interval / HZ;
1031 ihv3->nsrcs = htons(lmqt_srcs);
1032 ihv3->resv = 0;
1033 ihv3->suppress = sflag;
1034 ihv3->qrv = 2;
1035 ihv3->csum = 0;
1036 csum = &ihv3->csum;
1037 csum_start = (void *)ihv3;
1038 if (!pg || !with_srcs)
1039 break;
1040
1041 lmqt_srcs = 0;
1042 hlist_for_each_entry(ent, &pg->src_list, node) {
1043 if (over_lmqt == time_after(ent->timer.expires,
1044 lmqt) &&
1045 ent->src_query_rexmit_cnt > 0) {
1046 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
1047 ent->src_query_rexmit_cnt--;
1048 if (need_rexmit && ent->src_query_rexmit_cnt)
1049 *need_rexmit = true;
1050 }
1051 }
1052 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
1053 kfree_skb(skb);
1054 return NULL;
1055 }
1056 break;
1057 }
1058
1059 if (WARN_ON(!csum || !csum_start)) {
1060 kfree_skb(skb);
1061 return NULL;
1062 }
1063
1064 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
1065 skb_put(skb, igmp_hdr_size);
1066 __skb_pull(skb, sizeof(*eth));
1067
1068out:
1069 return skb;
1070}
1071
1072#if IS_ENABLED(CONFIG_IPV6)
1073static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx,
1074 struct net_bridge_mcast_port *pmctx,
1075 struct net_bridge_port_group *pg,
1076 const struct in6_addr *ip6_dst,
1077 const struct in6_addr *group,
1078 bool with_srcs, bool over_llqt,
1079 u8 sflag, u8 *igmp_type,
1080 bool *need_rexmit)
1081{
1082 struct net_bridge_port *p = pg ? pg->key.port : NULL;
1083 struct net_bridge_group_src *ent;
1084 size_t pkt_size, mld_hdr_size;
1085 unsigned long now = jiffies;
1086 struct mld2_query *mld2q;
1087 void *csum_start = NULL;
1088 unsigned long interval;
1089 __sum16 *csum = NULL;
1090 struct ipv6hdr *ip6h;
1091 struct mld_msg *mldq;
1092 struct sk_buff *skb;
1093 unsigned long llqt;
1094 struct ethhdr *eth;
1095 u16 llqt_srcs = 0;
1096 u8 *hopopt;
1097
1098 mld_hdr_size = sizeof(*mldq);
1099 if (brmctx->multicast_mld_version == 2) {
1100 mld_hdr_size = sizeof(*mld2q);
1101 if (pg && with_srcs) {
1102 llqt = now + (brmctx->multicast_last_member_interval *
1103 brmctx->multicast_last_member_count);
1104 hlist_for_each_entry(ent, &pg->src_list, node) {
1105 if (over_llqt == time_after(ent->timer.expires,
1106 llqt) &&
1107 ent->src_query_rexmit_cnt > 0)
1108 llqt_srcs++;
1109 }
1110
1111 if (!llqt_srcs)
1112 return NULL;
1113 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
1114 }
1115 }
1116
1117 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
1118 if ((p && pkt_size > p->dev->mtu) ||
1119 pkt_size > brmctx->br->dev->mtu)
1120 return NULL;
1121
1122 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
1123 if (!skb)
1124 goto out;
1125
1126 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
1127 skb->protocol = htons(ETH_P_IPV6);
1128
1129 /* Ethernet header */
1130 skb_reset_mac_header(skb);
1131 eth = eth_hdr(skb);
1132
1133 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
1134 eth->h_proto = htons(ETH_P_IPV6);
1135 skb_put(skb, sizeof(*eth));
1136
1137 /* IPv6 header + HbH option */
1138 skb_set_network_header(skb, skb->len);
1139 ip6h = ipv6_hdr(skb);
1140
1141 *(__force __be32 *)ip6h = htonl(0x60000000);
1142 ip6h->payload_len = htons(8 + mld_hdr_size);
1143 ip6h->nexthdr = IPPROTO_HOPOPTS;
1144 ip6h->hop_limit = 1;
1145 ip6h->daddr = *ip6_dst;
1146 if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev,
1147 &ip6h->daddr, 0, &ip6h->saddr)) {
1148 kfree_skb(skb);
1149 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false);
1150 return NULL;
1151 }
1152
1153 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true);
1154 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
1155
1156 hopopt = (u8 *)(ip6h + 1);
1157 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
1158 hopopt[1] = 0; /* length of HbH */
1159 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
1160 hopopt[3] = 2; /* Length of RA Option */
1161 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
1162 hopopt[5] = 0;
1163 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
1164 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
1165
1166 skb_put(skb, sizeof(*ip6h) + 8);
1167
1168 /* ICMPv6 */
1169 skb_set_transport_header(skb, skb->len);
1170 interval = ipv6_addr_any(group) ?
1171 brmctx->multicast_query_response_interval :
1172 brmctx->multicast_last_member_interval;
1173 *igmp_type = ICMPV6_MGM_QUERY;
1174 switch (brmctx->multicast_mld_version) {
1175 case 1:
1176 mldq = (struct mld_msg *)icmp6_hdr(skb);
1177 mldq->mld_type = ICMPV6_MGM_QUERY;
1178 mldq->mld_code = 0;
1179 mldq->mld_cksum = 0;
1180 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
1181 mldq->mld_reserved = 0;
1182 mldq->mld_mca = *group;
1183 csum = &mldq->mld_cksum;
1184 csum_start = (void *)mldq;
1185 break;
1186 case 2:
1187 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1188 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
1189 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
1190 mld2q->mld2q_code = 0;
1191 mld2q->mld2q_cksum = 0;
1192 mld2q->mld2q_resv1 = 0;
1193 mld2q->mld2q_resv2 = 0;
1194 mld2q->mld2q_suppress = sflag;
1195 mld2q->mld2q_qrv = 2;
1196 mld2q->mld2q_nsrcs = htons(llqt_srcs);
1197 mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ;
1198 mld2q->mld2q_mca = *group;
1199 csum = &mld2q->mld2q_cksum;
1200 csum_start = (void *)mld2q;
1201 if (!pg || !with_srcs)
1202 break;
1203
1204 llqt_srcs = 0;
1205 hlist_for_each_entry(ent, &pg->src_list, node) {
1206 if (over_llqt == time_after(ent->timer.expires,
1207 llqt) &&
1208 ent->src_query_rexmit_cnt > 0) {
1209 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
1210 ent->src_query_rexmit_cnt--;
1211 if (need_rexmit && ent->src_query_rexmit_cnt)
1212 *need_rexmit = true;
1213 }
1214 }
1215 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
1216 kfree_skb(skb);
1217 return NULL;
1218 }
1219 break;
1220 }
1221
1222 if (WARN_ON(!csum || !csum_start)) {
1223 kfree_skb(skb);
1224 return NULL;
1225 }
1226
1227 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
1228 IPPROTO_ICMPV6,
1229 csum_partial(csum_start, mld_hdr_size, 0));
1230 skb_put(skb, mld_hdr_size);
1231 __skb_pull(skb, sizeof(*eth));
1232
1233out:
1234 return skb;
1235}
1236#endif
1237
1238static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx,
1239 struct net_bridge_mcast_port *pmctx,
1240 struct net_bridge_port_group *pg,
1241 struct br_ip *ip_dst,
1242 struct br_ip *group,
1243 bool with_srcs, bool over_lmqt,
1244 u8 sflag, u8 *igmp_type,
1245 bool *need_rexmit)
1246{
1247 __be32 ip4_dst;
1248
1249 switch (group->proto) {
1250 case htons(ETH_P_IP):
1251 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
1252 return br_ip4_multicast_alloc_query(brmctx, pmctx, pg,
1253 ip4_dst, group->dst.ip4,
1254 with_srcs, over_lmqt,
1255 sflag, igmp_type,
1256 need_rexmit);
1257#if IS_ENABLED(CONFIG_IPV6)
1258 case htons(ETH_P_IPV6): {
1259 struct in6_addr ip6_dst;
1260
1261 if (ip_dst)
1262 ip6_dst = ip_dst->dst.ip6;
1263 else
1264 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1265 htonl(1));
1266
1267 return br_ip6_multicast_alloc_query(brmctx, pmctx, pg,
1268 &ip6_dst, &group->dst.ip6,
1269 with_srcs, over_lmqt,
1270 sflag, igmp_type,
1271 need_rexmit);
1272 }
1273#endif
1274 }
1275 return NULL;
1276}
1277
1278struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
1279 struct br_ip *group)
1280{
1281 struct net_bridge_mdb_entry *mp;
1282 int err;
1283
1284 mp = br_mdb_ip_get(br, group);
1285 if (mp)
1286 return mp;
1287
1288 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
1289 trace_br_mdb_full(br->dev, group);
1290 br_mc_disabled_update(br->dev, false, NULL);
1291 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1292 return ERR_PTR(-E2BIG);
1293 }
1294
1295 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1296 if (unlikely(!mp))
1297 return ERR_PTR(-ENOMEM);
1298
1299 mp->br = br;
1300 mp->addr = *group;
1301 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
1302 timer_setup(&mp->timer, br_multicast_group_expired, 0);
1303 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1304 br_mdb_rht_params);
1305 if (err) {
1306 kfree(mp);
1307 mp = ERR_PTR(err);
1308 } else {
1309 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1310 }
1311
1312 return mp;
1313}
1314
1315static void br_multicast_group_src_expired(struct timer_list *t)
1316{
1317 struct net_bridge_group_src *src = from_timer(src, t, timer);
1318 struct net_bridge_port_group *pg;
1319 struct net_bridge *br = src->br;
1320
1321 spin_lock(&br->multicast_lock);
1322 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1323 timer_pending(&src->timer))
1324 goto out;
1325
1326 pg = src->pg;
1327 if (pg->filter_mode == MCAST_INCLUDE) {
1328 br_multicast_del_group_src(src, false);
1329 if (!hlist_empty(&pg->src_list))
1330 goto out;
1331 br_multicast_find_del_pg(br, pg);
1332 } else {
1333 br_multicast_fwd_src_handle(src);
1334 }
1335
1336out:
1337 spin_unlock(&br->multicast_lock);
1338}
1339
1340struct net_bridge_group_src *
1341br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1342{
1343 struct net_bridge_group_src *ent;
1344
1345 switch (ip->proto) {
1346 case htons(ETH_P_IP):
1347 hlist_for_each_entry(ent, &pg->src_list, node)
1348 if (ip->src.ip4 == ent->addr.src.ip4)
1349 return ent;
1350 break;
1351#if IS_ENABLED(CONFIG_IPV6)
1352 case htons(ETH_P_IPV6):
1353 hlist_for_each_entry(ent, &pg->src_list, node)
1354 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
1355 return ent;
1356 break;
1357#endif
1358 }
1359
1360 return NULL;
1361}
1362
1363struct net_bridge_group_src *
1364br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1365{
1366 struct net_bridge_group_src *grp_src;
1367
1368 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1369 return NULL;
1370
1371 switch (src_ip->proto) {
1372 case htons(ETH_P_IP):
1373 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1374 ipv4_is_multicast(src_ip->src.ip4))
1375 return NULL;
1376 break;
1377#if IS_ENABLED(CONFIG_IPV6)
1378 case htons(ETH_P_IPV6):
1379 if (ipv6_addr_any(&src_ip->src.ip6) ||
1380 ipv6_addr_is_multicast(&src_ip->src.ip6))
1381 return NULL;
1382 break;
1383#endif
1384 }
1385
1386 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1387 if (unlikely(!grp_src))
1388 return NULL;
1389
1390 grp_src->pg = pg;
1391 grp_src->br = pg->key.port->br;
1392 grp_src->addr = *src_ip;
1393 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
1394 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1395
1396 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1397 pg->src_ents++;
1398
1399 return grp_src;
1400}
1401
1402struct net_bridge_port_group *br_multicast_new_port_group(
1403 struct net_bridge_port *port,
1404 const struct br_ip *group,
1405 struct net_bridge_port_group __rcu *next,
1406 unsigned char flags,
1407 const unsigned char *src,
1408 u8 filter_mode,
1409 u8 rt_protocol,
1410 struct netlink_ext_ack *extack)
1411{
1412 struct net_bridge_port_group *p;
1413 int err;
1414
1415 err = br_multicast_port_ngroups_inc(port, group, extack);
1416 if (err)
1417 return NULL;
1418
1419 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1420 if (unlikely(!p)) {
1421 NL_SET_ERR_MSG_MOD(extack, "Couldn't allocate new port group");
1422 goto dec_out;
1423 }
1424
1425 p->key.addr = *group;
1426 p->key.port = port;
1427 p->flags = flags;
1428 p->filter_mode = filter_mode;
1429 p->rt_protocol = rt_protocol;
1430 p->eht_host_tree = RB_ROOT;
1431 p->eht_set_tree = RB_ROOT;
1432 p->mcast_gc.destroy = br_multicast_destroy_port_group;
1433 INIT_HLIST_HEAD(&p->src_list);
1434
1435 if (!br_multicast_is_star_g(group) &&
1436 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1437 br_sg_port_rht_params)) {
1438 NL_SET_ERR_MSG_MOD(extack, "Couldn't insert new port group");
1439 goto free_out;
1440 }
1441
1442 rcu_assign_pointer(p->next, next);
1443 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
1444 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1445 hlist_add_head(&p->mglist, &port->mglist);
1446
1447 if (src)
1448 memcpy(p->eth_addr, src, ETH_ALEN);
1449 else
1450 eth_broadcast_addr(p->eth_addr);
1451
1452 return p;
1453
1454free_out:
1455 kfree(p);
1456dec_out:
1457 br_multicast_port_ngroups_dec(port, group->vid);
1458 return NULL;
1459}
1460
1461void br_multicast_del_port_group(struct net_bridge_port_group *p)
1462{
1463 struct net_bridge_port *port = p->key.port;
1464 __u16 vid = p->key.addr.vid;
1465
1466 hlist_del_init(&p->mglist);
1467 if (!br_multicast_is_star_g(&p->key.addr))
1468 rhashtable_remove_fast(&port->br->sg_port_tbl, &p->rhnode,
1469 br_sg_port_rht_params);
1470 kfree(p);
1471 br_multicast_port_ngroups_dec(port, vid);
1472}
1473
1474void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1475 struct net_bridge_mdb_entry *mp, bool notify)
1476{
1477 if (!mp->host_joined) {
1478 mp->host_joined = true;
1479 if (br_multicast_is_star_g(&mp->addr))
1480 br_multicast_star_g_host_state(mp);
1481 if (notify)
1482 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1483 }
1484
1485 if (br_group_is_l2(&mp->addr))
1486 return;
1487
1488 mod_timer(&mp->timer, jiffies + brmctx->multicast_membership_interval);
1489}
1490
1491void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1492{
1493 if (!mp->host_joined)
1494 return;
1495
1496 mp->host_joined = false;
1497 if (br_multicast_is_star_g(&mp->addr))
1498 br_multicast_star_g_host_state(mp);
1499 if (notify)
1500 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1501}
1502
1503static struct net_bridge_port_group *
1504__br_multicast_add_group(struct net_bridge_mcast *brmctx,
1505 struct net_bridge_mcast_port *pmctx,
1506 struct br_ip *group,
1507 const unsigned char *src,
1508 u8 filter_mode,
1509 bool igmpv2_mldv1,
1510 bool blocked)
1511{
1512 struct net_bridge_port_group __rcu **pp;
1513 struct net_bridge_port_group *p = NULL;
1514 struct net_bridge_mdb_entry *mp;
1515 unsigned long now = jiffies;
1516
1517 if (!br_multicast_ctx_should_use(brmctx, pmctx))
1518 goto out;
1519
1520 mp = br_multicast_new_group(brmctx->br, group);
1521 if (IS_ERR(mp))
1522 return ERR_CAST(mp);
1523
1524 if (!pmctx) {
1525 br_multicast_host_join(brmctx, mp, true);
1526 goto out;
1527 }
1528
1529 for (pp = &mp->ports;
1530 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
1531 pp = &p->next) {
1532 if (br_port_group_equal(p, pmctx->port, src))
1533 goto found;
1534 if ((unsigned long)p->key.port < (unsigned long)pmctx->port)
1535 break;
1536 }
1537
1538 p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src,
1539 filter_mode, RTPROT_KERNEL, NULL);
1540 if (unlikely(!p)) {
1541 p = ERR_PTR(-ENOMEM);
1542 goto out;
1543 }
1544 rcu_assign_pointer(*pp, p);
1545 if (blocked)
1546 p->flags |= MDB_PG_FLAGS_BLOCKED;
1547 br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB);
1548
1549found:
1550 if (igmpv2_mldv1)
1551 mod_timer(&p->timer,
1552 now + brmctx->multicast_membership_interval);
1553
1554out:
1555 return p;
1556}
1557
1558static int br_multicast_add_group(struct net_bridge_mcast *brmctx,
1559 struct net_bridge_mcast_port *pmctx,
1560 struct br_ip *group,
1561 const unsigned char *src,
1562 u8 filter_mode,
1563 bool igmpv2_mldv1)
1564{
1565 struct net_bridge_port_group *pg;
1566 int err;
1567
1568 spin_lock(&brmctx->br->multicast_lock);
1569 pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode,
1570 igmpv2_mldv1, false);
1571 /* NULL is considered valid for host joined groups */
1572 err = PTR_ERR_OR_ZERO(pg);
1573 spin_unlock(&brmctx->br->multicast_lock);
1574
1575 return err;
1576}
1577
1578static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx,
1579 struct net_bridge_mcast_port *pmctx,
1580 __be32 group,
1581 __u16 vid,
1582 const unsigned char *src,
1583 bool igmpv2)
1584{
1585 struct br_ip br_group;
1586 u8 filter_mode;
1587
1588 if (ipv4_is_local_multicast(group))
1589 return 0;
1590
1591 memset(&br_group, 0, sizeof(br_group));
1592 br_group.dst.ip4 = group;
1593 br_group.proto = htons(ETH_P_IP);
1594 br_group.vid = vid;
1595 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1596
1597 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1598 filter_mode, igmpv2);
1599}
1600
1601#if IS_ENABLED(CONFIG_IPV6)
1602static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx,
1603 struct net_bridge_mcast_port *pmctx,
1604 const struct in6_addr *group,
1605 __u16 vid,
1606 const unsigned char *src,
1607 bool mldv1)
1608{
1609 struct br_ip br_group;
1610 u8 filter_mode;
1611
1612 if (ipv6_addr_is_ll_all_nodes(group))
1613 return 0;
1614
1615 memset(&br_group, 0, sizeof(br_group));
1616 br_group.dst.ip6 = *group;
1617 br_group.proto = htons(ETH_P_IPV6);
1618 br_group.vid = vid;
1619 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1620
1621 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1622 filter_mode, mldv1);
1623}
1624#endif
1625
1626static bool br_multicast_rport_del(struct hlist_node *rlist)
1627{
1628 if (hlist_unhashed(rlist))
1629 return false;
1630
1631 hlist_del_init_rcu(rlist);
1632 return true;
1633}
1634
1635static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
1636{
1637 return br_multicast_rport_del(&pmctx->ip4_rlist);
1638}
1639
1640static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
1641{
1642#if IS_ENABLED(CONFIG_IPV6)
1643 return br_multicast_rport_del(&pmctx->ip6_rlist);
1644#else
1645 return false;
1646#endif
1647}
1648
1649static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx,
1650 struct timer_list *t,
1651 struct hlist_node *rlist)
1652{
1653 struct net_bridge *br = pmctx->port->br;
1654 bool del;
1655
1656 spin_lock(&br->multicast_lock);
1657 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1658 pmctx->multicast_router == MDB_RTR_TYPE_PERM ||
1659 timer_pending(t))
1660 goto out;
1661
1662 del = br_multicast_rport_del(rlist);
1663 br_multicast_rport_del_notify(pmctx, del);
1664out:
1665 spin_unlock(&br->multicast_lock);
1666}
1667
1668static void br_ip4_multicast_router_expired(struct timer_list *t)
1669{
1670 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1671 ip4_mc_router_timer);
1672
1673 br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist);
1674}
1675
1676#if IS_ENABLED(CONFIG_IPV6)
1677static void br_ip6_multicast_router_expired(struct timer_list *t)
1678{
1679 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1680 ip6_mc_router_timer);
1681
1682 br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist);
1683}
1684#endif
1685
1686static void br_mc_router_state_change(struct net_bridge *p,
1687 bool is_mc_router)
1688{
1689 struct switchdev_attr attr = {
1690 .orig_dev = p->dev,
1691 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1692 .flags = SWITCHDEV_F_DEFER,
1693 .u.mrouter = is_mc_router,
1694 };
1695
1696 switchdev_port_attr_set(p->dev, &attr, NULL);
1697}
1698
1699static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx,
1700 struct timer_list *timer)
1701{
1702 spin_lock(&brmctx->br->multicast_lock);
1703 if (brmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1704 brmctx->multicast_router == MDB_RTR_TYPE_PERM ||
1705 br_ip4_multicast_is_router(brmctx) ||
1706 br_ip6_multicast_is_router(brmctx))
1707 goto out;
1708
1709 br_mc_router_state_change(brmctx->br, false);
1710out:
1711 spin_unlock(&brmctx->br->multicast_lock);
1712}
1713
1714static void br_ip4_multicast_local_router_expired(struct timer_list *t)
1715{
1716 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1717 ip4_mc_router_timer);
1718
1719 br_multicast_local_router_expired(brmctx, t);
1720}
1721
1722#if IS_ENABLED(CONFIG_IPV6)
1723static void br_ip6_multicast_local_router_expired(struct timer_list *t)
1724{
1725 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1726 ip6_mc_router_timer);
1727
1728 br_multicast_local_router_expired(brmctx, t);
1729}
1730#endif
1731
1732static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx,
1733 struct bridge_mcast_own_query *query)
1734{
1735 spin_lock(&brmctx->br->multicast_lock);
1736 if (!netif_running(brmctx->br->dev) ||
1737 br_multicast_ctx_vlan_global_disabled(brmctx) ||
1738 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
1739 goto out;
1740
1741 br_multicast_start_querier(brmctx, query);
1742
1743out:
1744 spin_unlock(&brmctx->br->multicast_lock);
1745}
1746
1747static void br_ip4_multicast_querier_expired(struct timer_list *t)
1748{
1749 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1750 ip4_other_query.timer);
1751
1752 br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query);
1753}
1754
1755#if IS_ENABLED(CONFIG_IPV6)
1756static void br_ip6_multicast_querier_expired(struct timer_list *t)
1757{
1758 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1759 ip6_other_query.timer);
1760
1761 br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query);
1762}
1763#endif
1764
1765static void br_multicast_query_delay_expired(struct timer_list *t)
1766{
1767}
1768
1769static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx,
1770 struct br_ip *ip,
1771 struct sk_buff *skb)
1772{
1773 if (ip->proto == htons(ETH_P_IP))
1774 brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
1775#if IS_ENABLED(CONFIG_IPV6)
1776 else
1777 brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
1778#endif
1779}
1780
1781static void __br_multicast_send_query(struct net_bridge_mcast *brmctx,
1782 struct net_bridge_mcast_port *pmctx,
1783 struct net_bridge_port_group *pg,
1784 struct br_ip *ip_dst,
1785 struct br_ip *group,
1786 bool with_srcs,
1787 u8 sflag,
1788 bool *need_rexmit)
1789{
1790 bool over_lmqt = !!sflag;
1791 struct sk_buff *skb;
1792 u8 igmp_type;
1793
1794 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1795 !br_multicast_ctx_matches_vlan_snooping(brmctx))
1796 return;
1797
1798again_under_lmqt:
1799 skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group,
1800 with_srcs, over_lmqt, sflag, &igmp_type,
1801 need_rexmit);
1802 if (!skb)
1803 return;
1804
1805 if (pmctx) {
1806 skb->dev = pmctx->port->dev;
1807 br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type,
1808 BR_MCAST_DIR_TX);
1809 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
1810 dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev,
1811 br_dev_queue_push_xmit);
1812
1813 if (over_lmqt && with_srcs && sflag) {
1814 over_lmqt = false;
1815 goto again_under_lmqt;
1816 }
1817 } else {
1818 br_multicast_select_own_querier(brmctx, group, skb);
1819 br_multicast_count(brmctx->br, NULL, skb, igmp_type,
1820 BR_MCAST_DIR_RX);
1821 netif_rx(skb);
1822 }
1823}
1824
1825static void br_multicast_read_querier(const struct bridge_mcast_querier *querier,
1826 struct bridge_mcast_querier *dest)
1827{
1828 unsigned int seq;
1829
1830 memset(dest, 0, sizeof(*dest));
1831 do {
1832 seq = read_seqcount_begin(&querier->seq);
1833 dest->port_ifidx = querier->port_ifidx;
1834 memcpy(&dest->addr, &querier->addr, sizeof(struct br_ip));
1835 } while (read_seqcount_retry(&querier->seq, seq));
1836}
1837
1838static void br_multicast_update_querier(struct net_bridge_mcast *brmctx,
1839 struct bridge_mcast_querier *querier,
1840 int ifindex,
1841 struct br_ip *saddr)
1842{
1843 write_seqcount_begin(&querier->seq);
1844 querier->port_ifidx = ifindex;
1845 memcpy(&querier->addr, saddr, sizeof(*saddr));
1846 write_seqcount_end(&querier->seq);
1847}
1848
1849static void br_multicast_send_query(struct net_bridge_mcast *brmctx,
1850 struct net_bridge_mcast_port *pmctx,
1851 struct bridge_mcast_own_query *own_query)
1852{
1853 struct bridge_mcast_other_query *other_query = NULL;
1854 struct bridge_mcast_querier *querier;
1855 struct br_ip br_group;
1856 unsigned long time;
1857
1858 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1859 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
1860 !brmctx->multicast_querier)
1861 return;
1862
1863 memset(&br_group.dst, 0, sizeof(br_group.dst));
1864
1865 if (pmctx ? (own_query == &pmctx->ip4_own_query) :
1866 (own_query == &brmctx->ip4_own_query)) {
1867 querier = &brmctx->ip4_querier;
1868 other_query = &brmctx->ip4_other_query;
1869 br_group.proto = htons(ETH_P_IP);
1870#if IS_ENABLED(CONFIG_IPV6)
1871 } else {
1872 querier = &brmctx->ip6_querier;
1873 other_query = &brmctx->ip6_other_query;
1874 br_group.proto = htons(ETH_P_IPV6);
1875#endif
1876 }
1877
1878 if (!other_query || timer_pending(&other_query->timer))
1879 return;
1880
1881 /* we're about to select ourselves as querier */
1882 if (!pmctx && querier->port_ifidx) {
1883 struct br_ip zeroip = {};
1884
1885 br_multicast_update_querier(brmctx, querier, 0, &zeroip);
1886 }
1887
1888 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false,
1889 0, NULL);
1890
1891 time = jiffies;
1892 time += own_query->startup_sent < brmctx->multicast_startup_query_count ?
1893 brmctx->multicast_startup_query_interval :
1894 brmctx->multicast_query_interval;
1895 mod_timer(&own_query->timer, time);
1896}
1897
1898static void
1899br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx,
1900 struct bridge_mcast_own_query *query)
1901{
1902 struct net_bridge *br = pmctx->port->br;
1903 struct net_bridge_mcast *brmctx;
1904
1905 spin_lock(&br->multicast_lock);
1906 if (br_multicast_port_ctx_state_stopped(pmctx))
1907 goto out;
1908
1909 brmctx = br_multicast_port_ctx_get_global(pmctx);
1910 if (query->startup_sent < brmctx->multicast_startup_query_count)
1911 query->startup_sent++;
1912
1913 br_multicast_send_query(brmctx, pmctx, query);
1914
1915out:
1916 spin_unlock(&br->multicast_lock);
1917}
1918
1919static void br_ip4_multicast_port_query_expired(struct timer_list *t)
1920{
1921 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1922 ip4_own_query.timer);
1923
1924 br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query);
1925}
1926
1927#if IS_ENABLED(CONFIG_IPV6)
1928static void br_ip6_multicast_port_query_expired(struct timer_list *t)
1929{
1930 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1931 ip6_own_query.timer);
1932
1933 br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query);
1934}
1935#endif
1936
1937static void br_multicast_port_group_rexmit(struct timer_list *t)
1938{
1939 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1940 struct bridge_mcast_other_query *other_query = NULL;
1941 struct net_bridge *br = pg->key.port->br;
1942 struct net_bridge_mcast_port *pmctx;
1943 struct net_bridge_mcast *brmctx;
1944 bool need_rexmit = false;
1945
1946 spin_lock(&br->multicast_lock);
1947 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
1948 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1949 goto out;
1950
1951 pmctx = br_multicast_pg_to_port_ctx(pg);
1952 if (!pmctx)
1953 goto out;
1954 brmctx = br_multicast_port_ctx_get_global(pmctx);
1955 if (!brmctx->multicast_querier)
1956 goto out;
1957
1958 if (pg->key.addr.proto == htons(ETH_P_IP))
1959 other_query = &brmctx->ip4_other_query;
1960#if IS_ENABLED(CONFIG_IPV6)
1961 else
1962 other_query = &brmctx->ip6_other_query;
1963#endif
1964
1965 if (!other_query || timer_pending(&other_query->timer))
1966 goto out;
1967
1968 if (pg->grp_query_rexmit_cnt) {
1969 pg->grp_query_rexmit_cnt--;
1970 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
1971 &pg->key.addr, false, 1, NULL);
1972 }
1973 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
1974 &pg->key.addr, true, 0, &need_rexmit);
1975
1976 if (pg->grp_query_rexmit_cnt || need_rexmit)
1977 mod_timer(&pg->rexmit_timer, jiffies +
1978 brmctx->multicast_last_member_interval);
1979out:
1980 spin_unlock(&br->multicast_lock);
1981}
1982
1983static int br_mc_disabled_update(struct net_device *dev, bool value,
1984 struct netlink_ext_ack *extack)
1985{
1986 struct switchdev_attr attr = {
1987 .orig_dev = dev,
1988 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1989 .flags = SWITCHDEV_F_DEFER,
1990 .u.mc_disabled = !value,
1991 };
1992
1993 return switchdev_port_attr_set(dev, &attr, extack);
1994}
1995
1996void br_multicast_port_ctx_init(struct net_bridge_port *port,
1997 struct net_bridge_vlan *vlan,
1998 struct net_bridge_mcast_port *pmctx)
1999{
2000 pmctx->port = port;
2001 pmctx->vlan = vlan;
2002 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
2003 timer_setup(&pmctx->ip4_mc_router_timer,
2004 br_ip4_multicast_router_expired, 0);
2005 timer_setup(&pmctx->ip4_own_query.timer,
2006 br_ip4_multicast_port_query_expired, 0);
2007#if IS_ENABLED(CONFIG_IPV6)
2008 timer_setup(&pmctx->ip6_mc_router_timer,
2009 br_ip6_multicast_router_expired, 0);
2010 timer_setup(&pmctx->ip6_own_query.timer,
2011 br_ip6_multicast_port_query_expired, 0);
2012#endif
2013}
2014
2015void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
2016{
2017#if IS_ENABLED(CONFIG_IPV6)
2018 del_timer_sync(&pmctx->ip6_mc_router_timer);
2019#endif
2020 del_timer_sync(&pmctx->ip4_mc_router_timer);
2021}
2022
2023int br_multicast_add_port(struct net_bridge_port *port)
2024{
2025 int err;
2026
2027 port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
2028 br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx);
2029
2030 err = br_mc_disabled_update(port->dev,
2031 br_opt_get(port->br,
2032 BROPT_MULTICAST_ENABLED),
2033 NULL);
2034 if (err && err != -EOPNOTSUPP)
2035 return err;
2036
2037 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2038 if (!port->mcast_stats)
2039 return -ENOMEM;
2040
2041 return 0;
2042}
2043
2044void br_multicast_del_port(struct net_bridge_port *port)
2045{
2046 struct net_bridge *br = port->br;
2047 struct net_bridge_port_group *pg;
2048 HLIST_HEAD(deleted_head);
2049 struct hlist_node *n;
2050
2051 /* Take care of the remaining groups, only perm ones should be left */
2052 spin_lock_bh(&br->multicast_lock);
2053 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
2054 br_multicast_find_del_pg(br, pg);
2055 hlist_move_list(&br->mcast_gc_list, &deleted_head);
2056 spin_unlock_bh(&br->multicast_lock);
2057 br_multicast_gc(&deleted_head);
2058 br_multicast_port_ctx_deinit(&port->multicast_ctx);
2059 free_percpu(port->mcast_stats);
2060}
2061
2062static void br_multicast_enable(struct bridge_mcast_own_query *query)
2063{
2064 query->startup_sent = 0;
2065
2066 if (try_to_del_timer_sync(&query->timer) >= 0 ||
2067 del_timer(&query->timer))
2068 mod_timer(&query->timer, jiffies);
2069}
2070
2071static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx)
2072{
2073 struct net_bridge *br = pmctx->port->br;
2074 struct net_bridge_mcast *brmctx;
2075
2076 brmctx = br_multicast_port_ctx_get_global(pmctx);
2077 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
2078 !netif_running(br->dev))
2079 return;
2080
2081 br_multicast_enable(&pmctx->ip4_own_query);
2082#if IS_ENABLED(CONFIG_IPV6)
2083 br_multicast_enable(&pmctx->ip6_own_query);
2084#endif
2085 if (pmctx->multicast_router == MDB_RTR_TYPE_PERM) {
2086 br_ip4_multicast_add_router(brmctx, pmctx);
2087 br_ip6_multicast_add_router(brmctx, pmctx);
2088 }
2089
2090 if (br_multicast_port_ctx_is_vlan(pmctx)) {
2091 struct net_bridge_port_group *pg;
2092 u32 n = 0;
2093
2094 /* The mcast_n_groups counter might be wrong. First,
2095 * BR_VLFLAG_MCAST_ENABLED is toggled before temporary entries
2096 * are flushed, thus mcast_n_groups after the toggle does not
2097 * reflect the true values. And second, permanent entries added
2098 * while BR_VLFLAG_MCAST_ENABLED was disabled, are not reflected
2099 * either. Thus we have to refresh the counter.
2100 */
2101
2102 hlist_for_each_entry(pg, &pmctx->port->mglist, mglist) {
2103 if (pg->key.addr.vid == pmctx->vlan->vid)
2104 n++;
2105 }
2106 WRITE_ONCE(pmctx->mdb_n_entries, n);
2107 }
2108}
2109
2110void br_multicast_enable_port(struct net_bridge_port *port)
2111{
2112 struct net_bridge *br = port->br;
2113
2114 spin_lock_bh(&br->multicast_lock);
2115 __br_multicast_enable_port_ctx(&port->multicast_ctx);
2116 spin_unlock_bh(&br->multicast_lock);
2117}
2118
2119static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx)
2120{
2121 struct net_bridge_port_group *pg;
2122 struct hlist_node *n;
2123 bool del = false;
2124
2125 hlist_for_each_entry_safe(pg, n, &pmctx->port->mglist, mglist)
2126 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT) &&
2127 (!br_multicast_port_ctx_is_vlan(pmctx) ||
2128 pg->key.addr.vid == pmctx->vlan->vid))
2129 br_multicast_find_del_pg(pmctx->port->br, pg);
2130
2131 del |= br_ip4_multicast_rport_del(pmctx);
2132 del_timer(&pmctx->ip4_mc_router_timer);
2133 del_timer(&pmctx->ip4_own_query.timer);
2134 del |= br_ip6_multicast_rport_del(pmctx);
2135#if IS_ENABLED(CONFIG_IPV6)
2136 del_timer(&pmctx->ip6_mc_router_timer);
2137 del_timer(&pmctx->ip6_own_query.timer);
2138#endif
2139 br_multicast_rport_del_notify(pmctx, del);
2140}
2141
2142void br_multicast_disable_port(struct net_bridge_port *port)
2143{
2144 spin_lock_bh(&port->br->multicast_lock);
2145 __br_multicast_disable_port_ctx(&port->multicast_ctx);
2146 spin_unlock_bh(&port->br->multicast_lock);
2147}
2148
2149static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
2150{
2151 struct net_bridge_group_src *ent;
2152 struct hlist_node *tmp;
2153 int deleted = 0;
2154
2155 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
2156 if (ent->flags & BR_SGRP_F_DELETE) {
2157 br_multicast_del_group_src(ent, false);
2158 deleted++;
2159 }
2160
2161 return deleted;
2162}
2163
2164static void __grp_src_mod_timer(struct net_bridge_group_src *src,
2165 unsigned long expires)
2166{
2167 mod_timer(&src->timer, expires);
2168 br_multicast_fwd_src_handle(src);
2169}
2170
2171static void __grp_src_query_marked_and_rexmit(struct net_bridge_mcast *brmctx,
2172 struct net_bridge_mcast_port *pmctx,
2173 struct net_bridge_port_group *pg)
2174{
2175 struct bridge_mcast_other_query *other_query = NULL;
2176 u32 lmqc = brmctx->multicast_last_member_count;
2177 unsigned long lmqt, lmi, now = jiffies;
2178 struct net_bridge_group_src *ent;
2179
2180 if (!netif_running(brmctx->br->dev) ||
2181 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
2182 return;
2183
2184 if (pg->key.addr.proto == htons(ETH_P_IP))
2185 other_query = &brmctx->ip4_other_query;
2186#if IS_ENABLED(CONFIG_IPV6)
2187 else
2188 other_query = &brmctx->ip6_other_query;
2189#endif
2190
2191 lmqt = now + br_multicast_lmqt(brmctx);
2192 hlist_for_each_entry(ent, &pg->src_list, node) {
2193 if (ent->flags & BR_SGRP_F_SEND) {
2194 ent->flags &= ~BR_SGRP_F_SEND;
2195 if (ent->timer.expires > lmqt) {
2196 if (brmctx->multicast_querier &&
2197 other_query &&
2198 !timer_pending(&other_query->timer))
2199 ent->src_query_rexmit_cnt = lmqc;
2200 __grp_src_mod_timer(ent, lmqt);
2201 }
2202 }
2203 }
2204
2205 if (!brmctx->multicast_querier ||
2206 !other_query || timer_pending(&other_query->timer))
2207 return;
2208
2209 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
2210 &pg->key.addr, true, 1, NULL);
2211
2212 lmi = now + brmctx->multicast_last_member_interval;
2213 if (!timer_pending(&pg->rexmit_timer) ||
2214 time_after(pg->rexmit_timer.expires, lmi))
2215 mod_timer(&pg->rexmit_timer, lmi);
2216}
2217
2218static void __grp_send_query_and_rexmit(struct net_bridge_mcast *brmctx,
2219 struct net_bridge_mcast_port *pmctx,
2220 struct net_bridge_port_group *pg)
2221{
2222 struct bridge_mcast_other_query *other_query = NULL;
2223 unsigned long now = jiffies, lmi;
2224
2225 if (!netif_running(brmctx->br->dev) ||
2226 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
2227 return;
2228
2229 if (pg->key.addr.proto == htons(ETH_P_IP))
2230 other_query = &brmctx->ip4_other_query;
2231#if IS_ENABLED(CONFIG_IPV6)
2232 else
2233 other_query = &brmctx->ip6_other_query;
2234#endif
2235
2236 if (brmctx->multicast_querier &&
2237 other_query && !timer_pending(&other_query->timer)) {
2238 lmi = now + brmctx->multicast_last_member_interval;
2239 pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1;
2240 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
2241 &pg->key.addr, false, 0, NULL);
2242 if (!timer_pending(&pg->rexmit_timer) ||
2243 time_after(pg->rexmit_timer.expires, lmi))
2244 mod_timer(&pg->rexmit_timer, lmi);
2245 }
2246
2247 if (pg->filter_mode == MCAST_EXCLUDE &&
2248 (!timer_pending(&pg->timer) ||
2249 time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx))))
2250 mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx));
2251}
2252
2253/* State Msg type New state Actions
2254 * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
2255 * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
2256 * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
2257 */
2258static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx,
2259 struct net_bridge_port_group *pg, void *h_addr,
2260 void *srcs, u32 nsrcs, size_t addr_size,
2261 int grec_type)
2262{
2263 struct net_bridge_group_src *ent;
2264 unsigned long now = jiffies;
2265 bool changed = false;
2266 struct br_ip src_ip;
2267 u32 src_idx;
2268
2269 memset(&src_ip, 0, sizeof(src_ip));
2270 src_ip.proto = pg->key.addr.proto;
2271 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2272 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2273 ent = br_multicast_find_group_src(pg, &src_ip);
2274 if (!ent) {
2275 ent = br_multicast_new_group_src(pg, &src_ip);
2276 if (ent)
2277 changed = true;
2278 }
2279
2280 if (ent)
2281 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2282 }
2283
2284 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2285 grec_type))
2286 changed = true;
2287
2288 return changed;
2289}
2290
2291/* State Msg type New state Actions
2292 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2293 * Delete (A-B)
2294 * Group Timer=GMI
2295 */
2296static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx,
2297 struct net_bridge_port_group *pg, void *h_addr,
2298 void *srcs, u32 nsrcs, size_t addr_size,
2299 int grec_type)
2300{
2301 struct net_bridge_group_src *ent;
2302 struct br_ip src_ip;
2303 u32 src_idx;
2304
2305 hlist_for_each_entry(ent, &pg->src_list, node)
2306 ent->flags |= BR_SGRP_F_DELETE;
2307
2308 memset(&src_ip, 0, sizeof(src_ip));
2309 src_ip.proto = pg->key.addr.proto;
2310 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2311 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2312 ent = br_multicast_find_group_src(pg, &src_ip);
2313 if (ent)
2314 ent->flags &= ~BR_SGRP_F_DELETE;
2315 else
2316 ent = br_multicast_new_group_src(pg, &src_ip);
2317 if (ent)
2318 br_multicast_fwd_src_handle(ent);
2319 }
2320
2321 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2322 grec_type);
2323
2324 __grp_src_delete_marked(pg);
2325}
2326
2327/* State Msg type New state Actions
2328 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
2329 * Delete (X-A)
2330 * Delete (Y-A)
2331 * Group Timer=GMI
2332 */
2333static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx,
2334 struct net_bridge_port_group *pg, void *h_addr,
2335 void *srcs, u32 nsrcs, size_t addr_size,
2336 int grec_type)
2337{
2338 struct net_bridge_group_src *ent;
2339 unsigned long now = jiffies;
2340 bool changed = false;
2341 struct br_ip src_ip;
2342 u32 src_idx;
2343
2344 hlist_for_each_entry(ent, &pg->src_list, node)
2345 ent->flags |= BR_SGRP_F_DELETE;
2346
2347 memset(&src_ip, 0, sizeof(src_ip));
2348 src_ip.proto = pg->key.addr.proto;
2349 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2350 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2351 ent = br_multicast_find_group_src(pg, &src_ip);
2352 if (ent) {
2353 ent->flags &= ~BR_SGRP_F_DELETE;
2354 } else {
2355 ent = br_multicast_new_group_src(pg, &src_ip);
2356 if (ent) {
2357 __grp_src_mod_timer(ent,
2358 now + br_multicast_gmi(brmctx));
2359 changed = true;
2360 }
2361 }
2362 }
2363
2364 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2365 grec_type))
2366 changed = true;
2367
2368 if (__grp_src_delete_marked(pg))
2369 changed = true;
2370
2371 return changed;
2372}
2373
2374static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx,
2375 struct net_bridge_port_group *pg, void *h_addr,
2376 void *srcs, u32 nsrcs, size_t addr_size,
2377 int grec_type)
2378{
2379 bool changed = false;
2380
2381 switch (pg->filter_mode) {
2382 case MCAST_INCLUDE:
2383 __grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2384 grec_type);
2385 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2386 changed = true;
2387 break;
2388 case MCAST_EXCLUDE:
2389 changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs,
2390 addr_size, grec_type);
2391 break;
2392 }
2393
2394 pg->filter_mode = MCAST_EXCLUDE;
2395 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
2396
2397 return changed;
2398}
2399
2400/* State Msg type New state Actions
2401 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
2402 * Send Q(G,A-B)
2403 */
2404static bool __grp_src_toin_incl(struct net_bridge_mcast *brmctx,
2405 struct net_bridge_mcast_port *pmctx,
2406 struct net_bridge_port_group *pg, void *h_addr,
2407 void *srcs, u32 nsrcs, size_t addr_size,
2408 int grec_type)
2409{
2410 u32 src_idx, to_send = pg->src_ents;
2411 struct net_bridge_group_src *ent;
2412 unsigned long now = jiffies;
2413 bool changed = false;
2414 struct br_ip src_ip;
2415
2416 hlist_for_each_entry(ent, &pg->src_list, node)
2417 ent->flags |= BR_SGRP_F_SEND;
2418
2419 memset(&src_ip, 0, sizeof(src_ip));
2420 src_ip.proto = pg->key.addr.proto;
2421 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2422 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2423 ent = br_multicast_find_group_src(pg, &src_ip);
2424 if (ent) {
2425 ent->flags &= ~BR_SGRP_F_SEND;
2426 to_send--;
2427 } else {
2428 ent = br_multicast_new_group_src(pg, &src_ip);
2429 if (ent)
2430 changed = true;
2431 }
2432 if (ent)
2433 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2434 }
2435
2436 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2437 grec_type))
2438 changed = true;
2439
2440 if (to_send)
2441 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2442
2443 return changed;
2444}
2445
2446/* State Msg type New state Actions
2447 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
2448 * Send Q(G,X-A)
2449 * Send Q(G)
2450 */
2451static bool __grp_src_toin_excl(struct net_bridge_mcast *brmctx,
2452 struct net_bridge_mcast_port *pmctx,
2453 struct net_bridge_port_group *pg, void *h_addr,
2454 void *srcs, u32 nsrcs, size_t addr_size,
2455 int grec_type)
2456{
2457 u32 src_idx, to_send = pg->src_ents;
2458 struct net_bridge_group_src *ent;
2459 unsigned long now = jiffies;
2460 bool changed = false;
2461 struct br_ip src_ip;
2462
2463 hlist_for_each_entry(ent, &pg->src_list, node)
2464 if (timer_pending(&ent->timer))
2465 ent->flags |= BR_SGRP_F_SEND;
2466
2467 memset(&src_ip, 0, sizeof(src_ip));
2468 src_ip.proto = pg->key.addr.proto;
2469 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2470 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2471 ent = br_multicast_find_group_src(pg, &src_ip);
2472 if (ent) {
2473 if (timer_pending(&ent->timer)) {
2474 ent->flags &= ~BR_SGRP_F_SEND;
2475 to_send--;
2476 }
2477 } else {
2478 ent = br_multicast_new_group_src(pg, &src_ip);
2479 if (ent)
2480 changed = true;
2481 }
2482 if (ent)
2483 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2484 }
2485
2486 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2487 grec_type))
2488 changed = true;
2489
2490 if (to_send)
2491 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2492
2493 __grp_send_query_and_rexmit(brmctx, pmctx, pg);
2494
2495 return changed;
2496}
2497
2498static bool br_multicast_toin(struct net_bridge_mcast *brmctx,
2499 struct net_bridge_mcast_port *pmctx,
2500 struct net_bridge_port_group *pg, void *h_addr,
2501 void *srcs, u32 nsrcs, size_t addr_size,
2502 int grec_type)
2503{
2504 bool changed = false;
2505
2506 switch (pg->filter_mode) {
2507 case MCAST_INCLUDE:
2508 changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs,
2509 nsrcs, addr_size, grec_type);
2510 break;
2511 case MCAST_EXCLUDE:
2512 changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs,
2513 nsrcs, addr_size, grec_type);
2514 break;
2515 }
2516
2517 if (br_multicast_eht_should_del_pg(pg)) {
2518 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2519 br_multicast_find_del_pg(pg->key.port->br, pg);
2520 /* a notification has already been sent and we shouldn't
2521 * access pg after the delete so we have to return false
2522 */
2523 changed = false;
2524 }
2525
2526 return changed;
2527}
2528
2529/* State Msg type New state Actions
2530 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2531 * Delete (A-B)
2532 * Send Q(G,A*B)
2533 * Group Timer=GMI
2534 */
2535static void __grp_src_toex_incl(struct net_bridge_mcast *brmctx,
2536 struct net_bridge_mcast_port *pmctx,
2537 struct net_bridge_port_group *pg, void *h_addr,
2538 void *srcs, u32 nsrcs, size_t addr_size,
2539 int grec_type)
2540{
2541 struct net_bridge_group_src *ent;
2542 u32 src_idx, to_send = 0;
2543 struct br_ip src_ip;
2544
2545 hlist_for_each_entry(ent, &pg->src_list, node)
2546 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2547
2548 memset(&src_ip, 0, sizeof(src_ip));
2549 src_ip.proto = pg->key.addr.proto;
2550 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2551 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2552 ent = br_multicast_find_group_src(pg, &src_ip);
2553 if (ent) {
2554 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2555 BR_SGRP_F_SEND;
2556 to_send++;
2557 } else {
2558 ent = br_multicast_new_group_src(pg, &src_ip);
2559 }
2560 if (ent)
2561 br_multicast_fwd_src_handle(ent);
2562 }
2563
2564 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2565 grec_type);
2566
2567 __grp_src_delete_marked(pg);
2568 if (to_send)
2569 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2570}
2571
2572/* State Msg type New state Actions
2573 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2574 * Delete (X-A)
2575 * Delete (Y-A)
2576 * Send Q(G,A-Y)
2577 * Group Timer=GMI
2578 */
2579static bool __grp_src_toex_excl(struct net_bridge_mcast *brmctx,
2580 struct net_bridge_mcast_port *pmctx,
2581 struct net_bridge_port_group *pg, void *h_addr,
2582 void *srcs, u32 nsrcs, size_t addr_size,
2583 int grec_type)
2584{
2585 struct net_bridge_group_src *ent;
2586 u32 src_idx, to_send = 0;
2587 bool changed = false;
2588 struct br_ip src_ip;
2589
2590 hlist_for_each_entry(ent, &pg->src_list, node)
2591 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2592
2593 memset(&src_ip, 0, sizeof(src_ip));
2594 src_ip.proto = pg->key.addr.proto;
2595 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2596 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2597 ent = br_multicast_find_group_src(pg, &src_ip);
2598 if (ent) {
2599 ent->flags &= ~BR_SGRP_F_DELETE;
2600 } else {
2601 ent = br_multicast_new_group_src(pg, &src_ip);
2602 if (ent) {
2603 __grp_src_mod_timer(ent, pg->timer.expires);
2604 changed = true;
2605 }
2606 }
2607 if (ent && timer_pending(&ent->timer)) {
2608 ent->flags |= BR_SGRP_F_SEND;
2609 to_send++;
2610 }
2611 }
2612
2613 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2614 grec_type))
2615 changed = true;
2616
2617 if (__grp_src_delete_marked(pg))
2618 changed = true;
2619 if (to_send)
2620 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2621
2622 return changed;
2623}
2624
2625static bool br_multicast_toex(struct net_bridge_mcast *brmctx,
2626 struct net_bridge_mcast_port *pmctx,
2627 struct net_bridge_port_group *pg, void *h_addr,
2628 void *srcs, u32 nsrcs, size_t addr_size,
2629 int grec_type)
2630{
2631 bool changed = false;
2632
2633 switch (pg->filter_mode) {
2634 case MCAST_INCLUDE:
2635 __grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs,
2636 addr_size, grec_type);
2637 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2638 changed = true;
2639 break;
2640 case MCAST_EXCLUDE:
2641 changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs,
2642 nsrcs, addr_size, grec_type);
2643 break;
2644 }
2645
2646 pg->filter_mode = MCAST_EXCLUDE;
2647 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
2648
2649 return changed;
2650}
2651
2652/* State Msg type New state Actions
2653 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2654 */
2655static bool __grp_src_block_incl(struct net_bridge_mcast *brmctx,
2656 struct net_bridge_mcast_port *pmctx,
2657 struct net_bridge_port_group *pg, void *h_addr,
2658 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2659{
2660 struct net_bridge_group_src *ent;
2661 u32 src_idx, to_send = 0;
2662 bool changed = false;
2663 struct br_ip src_ip;
2664
2665 hlist_for_each_entry(ent, &pg->src_list, node)
2666 ent->flags &= ~BR_SGRP_F_SEND;
2667
2668 memset(&src_ip, 0, sizeof(src_ip));
2669 src_ip.proto = pg->key.addr.proto;
2670 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2671 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2672 ent = br_multicast_find_group_src(pg, &src_ip);
2673 if (ent) {
2674 ent->flags |= BR_SGRP_F_SEND;
2675 to_send++;
2676 }
2677 }
2678
2679 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2680 grec_type))
2681 changed = true;
2682
2683 if (to_send)
2684 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2685
2686 return changed;
2687}
2688
2689/* State Msg type New state Actions
2690 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2691 * Send Q(G,A-Y)
2692 */
2693static bool __grp_src_block_excl(struct net_bridge_mcast *brmctx,
2694 struct net_bridge_mcast_port *pmctx,
2695 struct net_bridge_port_group *pg, void *h_addr,
2696 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2697{
2698 struct net_bridge_group_src *ent;
2699 u32 src_idx, to_send = 0;
2700 bool changed = false;
2701 struct br_ip src_ip;
2702
2703 hlist_for_each_entry(ent, &pg->src_list, node)
2704 ent->flags &= ~BR_SGRP_F_SEND;
2705
2706 memset(&src_ip, 0, sizeof(src_ip));
2707 src_ip.proto = pg->key.addr.proto;
2708 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2709 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2710 ent = br_multicast_find_group_src(pg, &src_ip);
2711 if (!ent) {
2712 ent = br_multicast_new_group_src(pg, &src_ip);
2713 if (ent) {
2714 __grp_src_mod_timer(ent, pg->timer.expires);
2715 changed = true;
2716 }
2717 }
2718 if (ent && timer_pending(&ent->timer)) {
2719 ent->flags |= BR_SGRP_F_SEND;
2720 to_send++;
2721 }
2722 }
2723
2724 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2725 grec_type))
2726 changed = true;
2727
2728 if (to_send)
2729 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2730
2731 return changed;
2732}
2733
2734static bool br_multicast_block(struct net_bridge_mcast *brmctx,
2735 struct net_bridge_mcast_port *pmctx,
2736 struct net_bridge_port_group *pg, void *h_addr,
2737 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2738{
2739 bool changed = false;
2740
2741 switch (pg->filter_mode) {
2742 case MCAST_INCLUDE:
2743 changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs,
2744 nsrcs, addr_size, grec_type);
2745 break;
2746 case MCAST_EXCLUDE:
2747 changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs,
2748 nsrcs, addr_size, grec_type);
2749 break;
2750 }
2751
2752 if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
2753 br_multicast_eht_should_del_pg(pg)) {
2754 if (br_multicast_eht_should_del_pg(pg))
2755 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2756 br_multicast_find_del_pg(pg->key.port->br, pg);
2757 /* a notification has already been sent and we shouldn't
2758 * access pg after the delete so we have to return false
2759 */
2760 changed = false;
2761 }
2762
2763 return changed;
2764}
2765
2766static struct net_bridge_port_group *
2767br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2768 struct net_bridge_port *p,
2769 const unsigned char *src)
2770{
2771 struct net_bridge *br __maybe_unused = mp->br;
2772 struct net_bridge_port_group *pg;
2773
2774 for (pg = mlock_dereference(mp->ports, br);
2775 pg;
2776 pg = mlock_dereference(pg->next, br))
2777 if (br_port_group_equal(pg, p, src))
2778 return pg;
2779
2780 return NULL;
2781}
2782
2783static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx,
2784 struct net_bridge_mcast_port *pmctx,
2785 struct sk_buff *skb,
2786 u16 vid)
2787{
2788 bool igmpv2 = brmctx->multicast_igmp_version == 2;
2789 struct net_bridge_mdb_entry *mdst;
2790 struct net_bridge_port_group *pg;
2791 const unsigned char *src;
2792 struct igmpv3_report *ih;
2793 struct igmpv3_grec *grec;
2794 int i, len, num, type;
2795 __be32 group, *h_addr;
2796 bool changed = false;
2797 int err = 0;
2798 u16 nsrcs;
2799
2800 ih = igmpv3_report_hdr(skb);
2801 num = ntohs(ih->ngrec);
2802 len = skb_transport_offset(skb) + sizeof(*ih);
2803
2804 for (i = 0; i < num; i++) {
2805 len += sizeof(*grec);
2806 if (!ip_mc_may_pull(skb, len))
2807 return -EINVAL;
2808
2809 grec = (void *)(skb->data + len - sizeof(*grec));
2810 group = grec->grec_mca;
2811 type = grec->grec_type;
2812 nsrcs = ntohs(grec->grec_nsrcs);
2813
2814 len += nsrcs * 4;
2815 if (!ip_mc_may_pull(skb, len))
2816 return -EINVAL;
2817
2818 switch (type) {
2819 case IGMPV3_MODE_IS_INCLUDE:
2820 case IGMPV3_MODE_IS_EXCLUDE:
2821 case IGMPV3_CHANGE_TO_INCLUDE:
2822 case IGMPV3_CHANGE_TO_EXCLUDE:
2823 case IGMPV3_ALLOW_NEW_SOURCES:
2824 case IGMPV3_BLOCK_OLD_SOURCES:
2825 break;
2826
2827 default:
2828 continue;
2829 }
2830
2831 src = eth_hdr(skb)->h_source;
2832 if (nsrcs == 0 &&
2833 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2834 type == IGMPV3_MODE_IS_INCLUDE)) {
2835 if (!pmctx || igmpv2) {
2836 br_ip4_multicast_leave_group(brmctx, pmctx,
2837 group, vid, src);
2838 continue;
2839 }
2840 } else {
2841 err = br_ip4_multicast_add_group(brmctx, pmctx, group,
2842 vid, src, igmpv2);
2843 if (err)
2844 break;
2845 }
2846
2847 if (!pmctx || igmpv2)
2848 continue;
2849
2850 spin_lock(&brmctx->br->multicast_lock);
2851 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2852 goto unlock_continue;
2853
2854 mdst = br_mdb_ip4_get(brmctx->br, group, vid);
2855 if (!mdst)
2856 goto unlock_continue;
2857 pg = br_multicast_find_port(mdst, pmctx->port, src);
2858 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2859 goto unlock_continue;
2860 /* reload grec and host addr */
2861 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
2862 h_addr = &ip_hdr(skb)->saddr;
2863 switch (type) {
2864 case IGMPV3_ALLOW_NEW_SOURCES:
2865 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2866 grec->grec_src,
2867 nsrcs, sizeof(__be32), type);
2868 break;
2869 case IGMPV3_MODE_IS_INCLUDE:
2870 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2871 grec->grec_src,
2872 nsrcs, sizeof(__be32), type);
2873 break;
2874 case IGMPV3_MODE_IS_EXCLUDE:
2875 changed = br_multicast_isexc(brmctx, pg, h_addr,
2876 grec->grec_src,
2877 nsrcs, sizeof(__be32), type);
2878 break;
2879 case IGMPV3_CHANGE_TO_INCLUDE:
2880 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
2881 grec->grec_src,
2882 nsrcs, sizeof(__be32), type);
2883 break;
2884 case IGMPV3_CHANGE_TO_EXCLUDE:
2885 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
2886 grec->grec_src,
2887 nsrcs, sizeof(__be32), type);
2888 break;
2889 case IGMPV3_BLOCK_OLD_SOURCES:
2890 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
2891 grec->grec_src,
2892 nsrcs, sizeof(__be32), type);
2893 break;
2894 }
2895 if (changed)
2896 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
2897unlock_continue:
2898 spin_unlock(&brmctx->br->multicast_lock);
2899 }
2900
2901 return err;
2902}
2903
2904#if IS_ENABLED(CONFIG_IPV6)
2905static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx,
2906 struct net_bridge_mcast_port *pmctx,
2907 struct sk_buff *skb,
2908 u16 vid)
2909{
2910 bool mldv1 = brmctx->multicast_mld_version == 1;
2911 struct net_bridge_mdb_entry *mdst;
2912 struct net_bridge_port_group *pg;
2913 unsigned int nsrcs_offset;
2914 struct mld2_report *mld2r;
2915 const unsigned char *src;
2916 struct in6_addr *h_addr;
2917 struct mld2_grec *grec;
2918 unsigned int grec_len;
2919 bool changed = false;
2920 int i, len, num;
2921 int err = 0;
2922
2923 if (!ipv6_mc_may_pull(skb, sizeof(*mld2r)))
2924 return -EINVAL;
2925
2926 mld2r = (struct mld2_report *)icmp6_hdr(skb);
2927 num = ntohs(mld2r->mld2r_ngrec);
2928 len = skb_transport_offset(skb) + sizeof(*mld2r);
2929
2930 for (i = 0; i < num; i++) {
2931 __be16 *_nsrcs, __nsrcs;
2932 u16 nsrcs;
2933
2934 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2935
2936 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
2937 nsrcs_offset + sizeof(__nsrcs))
2938 return -EINVAL;
2939
2940 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2941 sizeof(__nsrcs), &__nsrcs);
2942 if (!_nsrcs)
2943 return -EINVAL;
2944
2945 nsrcs = ntohs(*_nsrcs);
2946 grec_len = struct_size(grec, grec_src, nsrcs);
2947
2948 if (!ipv6_mc_may_pull(skb, len + grec_len))
2949 return -EINVAL;
2950
2951 grec = (struct mld2_grec *)(skb->data + len);
2952 len += grec_len;
2953
2954 switch (grec->grec_type) {
2955 case MLD2_MODE_IS_INCLUDE:
2956 case MLD2_MODE_IS_EXCLUDE:
2957 case MLD2_CHANGE_TO_INCLUDE:
2958 case MLD2_CHANGE_TO_EXCLUDE:
2959 case MLD2_ALLOW_NEW_SOURCES:
2960 case MLD2_BLOCK_OLD_SOURCES:
2961 break;
2962
2963 default:
2964 continue;
2965 }
2966
2967 src = eth_hdr(skb)->h_source;
2968 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2969 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
2970 nsrcs == 0) {
2971 if (!pmctx || mldv1) {
2972 br_ip6_multicast_leave_group(brmctx, pmctx,
2973 &grec->grec_mca,
2974 vid, src);
2975 continue;
2976 }
2977 } else {
2978 err = br_ip6_multicast_add_group(brmctx, pmctx,
2979 &grec->grec_mca, vid,
2980 src, mldv1);
2981 if (err)
2982 break;
2983 }
2984
2985 if (!pmctx || mldv1)
2986 continue;
2987
2988 spin_lock(&brmctx->br->multicast_lock);
2989 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2990 goto unlock_continue;
2991
2992 mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid);
2993 if (!mdst)
2994 goto unlock_continue;
2995 pg = br_multicast_find_port(mdst, pmctx->port, src);
2996 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2997 goto unlock_continue;
2998 h_addr = &ipv6_hdr(skb)->saddr;
2999 switch (grec->grec_type) {
3000 case MLD2_ALLOW_NEW_SOURCES:
3001 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
3002 grec->grec_src, nsrcs,
3003 sizeof(struct in6_addr),
3004 grec->grec_type);
3005 break;
3006 case MLD2_MODE_IS_INCLUDE:
3007 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
3008 grec->grec_src, nsrcs,
3009 sizeof(struct in6_addr),
3010 grec->grec_type);
3011 break;
3012 case MLD2_MODE_IS_EXCLUDE:
3013 changed = br_multicast_isexc(brmctx, pg, h_addr,
3014 grec->grec_src, nsrcs,
3015 sizeof(struct in6_addr),
3016 grec->grec_type);
3017 break;
3018 case MLD2_CHANGE_TO_INCLUDE:
3019 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
3020 grec->grec_src, nsrcs,
3021 sizeof(struct in6_addr),
3022 grec->grec_type);
3023 break;
3024 case MLD2_CHANGE_TO_EXCLUDE:
3025 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
3026 grec->grec_src, nsrcs,
3027 sizeof(struct in6_addr),
3028 grec->grec_type);
3029 break;
3030 case MLD2_BLOCK_OLD_SOURCES:
3031 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
3032 grec->grec_src, nsrcs,
3033 sizeof(struct in6_addr),
3034 grec->grec_type);
3035 break;
3036 }
3037 if (changed)
3038 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
3039unlock_continue:
3040 spin_unlock(&brmctx->br->multicast_lock);
3041 }
3042
3043 return err;
3044}
3045#endif
3046
3047static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx,
3048 struct net_bridge_mcast_port *pmctx,
3049 struct br_ip *saddr)
3050{
3051 int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0;
3052 struct timer_list *own_timer, *other_timer;
3053 struct bridge_mcast_querier *querier;
3054
3055 switch (saddr->proto) {
3056 case htons(ETH_P_IP):
3057 querier = &brmctx->ip4_querier;
3058 own_timer = &brmctx->ip4_own_query.timer;
3059 other_timer = &brmctx->ip4_other_query.timer;
3060 if (!querier->addr.src.ip4 ||
3061 ntohl(saddr->src.ip4) <= ntohl(querier->addr.src.ip4))
3062 goto update;
3063 break;
3064#if IS_ENABLED(CONFIG_IPV6)
3065 case htons(ETH_P_IPV6):
3066 querier = &brmctx->ip6_querier;
3067 own_timer = &brmctx->ip6_own_query.timer;
3068 other_timer = &brmctx->ip6_other_query.timer;
3069 if (ipv6_addr_cmp(&saddr->src.ip6, &querier->addr.src.ip6) <= 0)
3070 goto update;
3071 break;
3072#endif
3073 default:
3074 return false;
3075 }
3076
3077 if (!timer_pending(own_timer) && !timer_pending(other_timer))
3078 goto update;
3079
3080 return false;
3081
3082update:
3083 br_multicast_update_querier(brmctx, querier, port_ifidx, saddr);
3084
3085 return true;
3086}
3087
3088static struct net_bridge_port *
3089__br_multicast_get_querier_port(struct net_bridge *br,
3090 const struct bridge_mcast_querier *querier)
3091{
3092 int port_ifidx = READ_ONCE(querier->port_ifidx);
3093 struct net_bridge_port *p;
3094 struct net_device *dev;
3095
3096 if (port_ifidx == 0)
3097 return NULL;
3098
3099 dev = dev_get_by_index_rcu(dev_net(br->dev), port_ifidx);
3100 if (!dev)
3101 return NULL;
3102 p = br_port_get_rtnl_rcu(dev);
3103 if (!p || p->br != br)
3104 return NULL;
3105
3106 return p;
3107}
3108
3109size_t br_multicast_querier_state_size(void)
3110{
3111 return nla_total_size(0) + /* nest attribute */
3112 nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */
3113 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IP_PORT */
3114 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IP_OTHER_TIMER */
3115#if IS_ENABLED(CONFIG_IPV6)
3116 nla_total_size(sizeof(struct in6_addr)) + /* BRIDGE_QUERIER_IPV6_ADDRESS */
3117 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IPV6_PORT */
3118 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IPV6_OTHER_TIMER */
3119#endif
3120 0;
3121}
3122
3123/* protected by rtnl or rcu */
3124int br_multicast_dump_querier_state(struct sk_buff *skb,
3125 const struct net_bridge_mcast *brmctx,
3126 int nest_attr)
3127{
3128 struct bridge_mcast_querier querier = {};
3129 struct net_bridge_port *p;
3130 struct nlattr *nest;
3131
3132 if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
3133 br_multicast_ctx_vlan_global_disabled(brmctx))
3134 return 0;
3135
3136 nest = nla_nest_start(skb, nest_attr);
3137 if (!nest)
3138 return -EMSGSIZE;
3139
3140 rcu_read_lock();
3141 if (!brmctx->multicast_querier &&
3142 !timer_pending(&brmctx->ip4_other_query.timer))
3143 goto out_v6;
3144
3145 br_multicast_read_querier(&brmctx->ip4_querier, &querier);
3146 if (nla_put_in_addr(skb, BRIDGE_QUERIER_IP_ADDRESS,
3147 querier.addr.src.ip4)) {
3148 rcu_read_unlock();
3149 goto out_err;
3150 }
3151
3152 p = __br_multicast_get_querier_port(brmctx->br, &querier);
3153 if (timer_pending(&brmctx->ip4_other_query.timer) &&
3154 (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IP_OTHER_TIMER,
3155 br_timer_value(&brmctx->ip4_other_query.timer),
3156 BRIDGE_QUERIER_PAD) ||
3157 (p && nla_put_u32(skb, BRIDGE_QUERIER_IP_PORT, p->dev->ifindex)))) {
3158 rcu_read_unlock();
3159 goto out_err;
3160 }
3161
3162out_v6:
3163#if IS_ENABLED(CONFIG_IPV6)
3164 if (!brmctx->multicast_querier &&
3165 !timer_pending(&brmctx->ip6_other_query.timer))
3166 goto out;
3167
3168 br_multicast_read_querier(&brmctx->ip6_querier, &querier);
3169 if (nla_put_in6_addr(skb, BRIDGE_QUERIER_IPV6_ADDRESS,
3170 &querier.addr.src.ip6)) {
3171 rcu_read_unlock();
3172 goto out_err;
3173 }
3174
3175 p = __br_multicast_get_querier_port(brmctx->br, &querier);
3176 if (timer_pending(&brmctx->ip6_other_query.timer) &&
3177 (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IPV6_OTHER_TIMER,
3178 br_timer_value(&brmctx->ip6_other_query.timer),
3179 BRIDGE_QUERIER_PAD) ||
3180 (p && nla_put_u32(skb, BRIDGE_QUERIER_IPV6_PORT,
3181 p->dev->ifindex)))) {
3182 rcu_read_unlock();
3183 goto out_err;
3184 }
3185out:
3186#endif
3187 rcu_read_unlock();
3188 nla_nest_end(skb, nest);
3189 if (!nla_len(nest))
3190 nla_nest_cancel(skb, nest);
3191
3192 return 0;
3193
3194out_err:
3195 nla_nest_cancel(skb, nest);
3196 return -EMSGSIZE;
3197}
3198
3199static void
3200br_multicast_update_query_timer(struct net_bridge_mcast *brmctx,
3201 struct bridge_mcast_other_query *query,
3202 unsigned long max_delay)
3203{
3204 if (!timer_pending(&query->timer))
3205 mod_timer(&query->delay_timer, jiffies + max_delay);
3206
3207 mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval);
3208}
3209
3210static void br_port_mc_router_state_change(struct net_bridge_port *p,
3211 bool is_mc_router)
3212{
3213 struct switchdev_attr attr = {
3214 .orig_dev = p->dev,
3215 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
3216 .flags = SWITCHDEV_F_DEFER,
3217 .u.mrouter = is_mc_router,
3218 };
3219
3220 switchdev_port_attr_set(p->dev, &attr, NULL);
3221}
3222
3223static struct net_bridge_port *
3224br_multicast_rport_from_node(struct net_bridge_mcast *brmctx,
3225 struct hlist_head *mc_router_list,
3226 struct hlist_node *rlist)
3227{
3228 struct net_bridge_mcast_port *pmctx;
3229
3230#if IS_ENABLED(CONFIG_IPV6)
3231 if (mc_router_list == &brmctx->ip6_mc_router_list)
3232 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3233 ip6_rlist);
3234 else
3235#endif
3236 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3237 ip4_rlist);
3238
3239 return pmctx->port;
3240}
3241
3242static struct hlist_node *
3243br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx,
3244 struct net_bridge_port *port,
3245 struct hlist_head *mc_router_list)
3246
3247{
3248 struct hlist_node *slot = NULL;
3249 struct net_bridge_port *p;
3250 struct hlist_node *rlist;
3251
3252 hlist_for_each(rlist, mc_router_list) {
3253 p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist);
3254
3255 if ((unsigned long)port >= (unsigned long)p)
3256 break;
3257
3258 slot = rlist;
3259 }
3260
3261 return slot;
3262}
3263
3264static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx,
3265 struct hlist_node *rnode)
3266{
3267#if IS_ENABLED(CONFIG_IPV6)
3268 if (rnode != &pmctx->ip6_rlist)
3269 return hlist_unhashed(&pmctx->ip6_rlist);
3270 else
3271 return hlist_unhashed(&pmctx->ip4_rlist);
3272#else
3273 return true;
3274#endif
3275}
3276
3277/* Add port to router_list
3278 * list is maintained ordered by pointer value
3279 * and locked by br->multicast_lock and RCU
3280 */
3281static void br_multicast_add_router(struct net_bridge_mcast *brmctx,
3282 struct net_bridge_mcast_port *pmctx,
3283 struct hlist_node *rlist,
3284 struct hlist_head *mc_router_list)
3285{
3286 struct hlist_node *slot;
3287
3288 if (!hlist_unhashed(rlist))
3289 return;
3290
3291 slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list);
3292
3293 if (slot)
3294 hlist_add_behind_rcu(rlist, slot);
3295 else
3296 hlist_add_head_rcu(rlist, mc_router_list);
3297
3298 /* For backwards compatibility for now, only notify if we
3299 * switched from no IPv4/IPv6 multicast router to a new
3300 * IPv4 or IPv6 multicast router.
3301 */
3302 if (br_multicast_no_router_otherpf(pmctx, rlist)) {
3303 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB);
3304 br_port_mc_router_state_change(pmctx->port, true);
3305 }
3306}
3307
3308/* Add port to router_list
3309 * list is maintained ordered by pointer value
3310 * and locked by br->multicast_lock and RCU
3311 */
3312static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
3313 struct net_bridge_mcast_port *pmctx)
3314{
3315 br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist,
3316 &brmctx->ip4_mc_router_list);
3317}
3318
3319/* Add port to router_list
3320 * list is maintained ordered by pointer value
3321 * and locked by br->multicast_lock and RCU
3322 */
3323static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
3324 struct net_bridge_mcast_port *pmctx)
3325{
3326#if IS_ENABLED(CONFIG_IPV6)
3327 br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist,
3328 &brmctx->ip6_mc_router_list);
3329#endif
3330}
3331
3332static void br_multicast_mark_router(struct net_bridge_mcast *brmctx,
3333 struct net_bridge_mcast_port *pmctx,
3334 struct timer_list *timer,
3335 struct hlist_node *rlist,
3336 struct hlist_head *mc_router_list)
3337{
3338 unsigned long now = jiffies;
3339
3340 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3341 return;
3342
3343 if (!pmctx) {
3344 if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
3345 if (!br_ip4_multicast_is_router(brmctx) &&
3346 !br_ip6_multicast_is_router(brmctx))
3347 br_mc_router_state_change(brmctx->br, true);
3348 mod_timer(timer, now + brmctx->multicast_querier_interval);
3349 }
3350 return;
3351 }
3352
3353 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
3354 pmctx->multicast_router == MDB_RTR_TYPE_PERM)
3355 return;
3356
3357 br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list);
3358 mod_timer(timer, now + brmctx->multicast_querier_interval);
3359}
3360
3361static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx,
3362 struct net_bridge_mcast_port *pmctx)
3363{
3364 struct timer_list *timer = &brmctx->ip4_mc_router_timer;
3365 struct hlist_node *rlist = NULL;
3366
3367 if (pmctx) {
3368 timer = &pmctx->ip4_mc_router_timer;
3369 rlist = &pmctx->ip4_rlist;
3370 }
3371
3372 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3373 &brmctx->ip4_mc_router_list);
3374}
3375
3376static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx,
3377 struct net_bridge_mcast_port *pmctx)
3378{
3379#if IS_ENABLED(CONFIG_IPV6)
3380 struct timer_list *timer = &brmctx->ip6_mc_router_timer;
3381 struct hlist_node *rlist = NULL;
3382
3383 if (pmctx) {
3384 timer = &pmctx->ip6_mc_router_timer;
3385 rlist = &pmctx->ip6_rlist;
3386 }
3387
3388 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3389 &brmctx->ip6_mc_router_list);
3390#endif
3391}
3392
3393static void
3394br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx,
3395 struct net_bridge_mcast_port *pmctx,
3396 struct bridge_mcast_other_query *query,
3397 struct br_ip *saddr,
3398 unsigned long max_delay)
3399{
3400 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
3401 return;
3402
3403 br_multicast_update_query_timer(brmctx, query, max_delay);
3404 br_ip4_multicast_mark_router(brmctx, pmctx);
3405}
3406
3407#if IS_ENABLED(CONFIG_IPV6)
3408static void
3409br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx,
3410 struct net_bridge_mcast_port *pmctx,
3411 struct bridge_mcast_other_query *query,
3412 struct br_ip *saddr,
3413 unsigned long max_delay)
3414{
3415 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
3416 return;
3417
3418 br_multicast_update_query_timer(brmctx, query, max_delay);
3419 br_ip6_multicast_mark_router(brmctx, pmctx);
3420}
3421#endif
3422
3423static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx,
3424 struct net_bridge_mcast_port *pmctx,
3425 struct sk_buff *skb,
3426 u16 vid)
3427{
3428 unsigned int transport_len = ip_transport_len(skb);
3429 const struct iphdr *iph = ip_hdr(skb);
3430 struct igmphdr *ih = igmp_hdr(skb);
3431 struct net_bridge_mdb_entry *mp;
3432 struct igmpv3_query *ih3;
3433 struct net_bridge_port_group *p;
3434 struct net_bridge_port_group __rcu **pp;
3435 struct br_ip saddr = {};
3436 unsigned long max_delay;
3437 unsigned long now = jiffies;
3438 __be32 group;
3439
3440 spin_lock(&brmctx->br->multicast_lock);
3441 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3442 goto out;
3443
3444 group = ih->group;
3445
3446 if (transport_len == sizeof(*ih)) {
3447 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
3448
3449 if (!max_delay) {
3450 max_delay = 10 * HZ;
3451 group = 0;
3452 }
3453 } else if (transport_len >= sizeof(*ih3)) {
3454 ih3 = igmpv3_query_hdr(skb);
3455 if (ih3->nsrcs ||
3456 (brmctx->multicast_igmp_version == 3 && group &&
3457 ih3->suppress))
3458 goto out;
3459
3460 max_delay = ih3->code ?
3461 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
3462 } else {
3463 goto out;
3464 }
3465
3466 if (!group) {
3467 saddr.proto = htons(ETH_P_IP);
3468 saddr.src.ip4 = iph->saddr;
3469
3470 br_ip4_multicast_query_received(brmctx, pmctx,
3471 &brmctx->ip4_other_query,
3472 &saddr, max_delay);
3473 goto out;
3474 }
3475
3476 mp = br_mdb_ip4_get(brmctx->br, group, vid);
3477 if (!mp)
3478 goto out;
3479
3480 max_delay *= brmctx->multicast_last_member_count;
3481
3482 if (mp->host_joined &&
3483 (timer_pending(&mp->timer) ?
3484 time_after(mp->timer.expires, now + max_delay) :
3485 try_to_del_timer_sync(&mp->timer) >= 0))
3486 mod_timer(&mp->timer, now + max_delay);
3487
3488 for (pp = &mp->ports;
3489 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3490 pp = &p->next) {
3491 if (timer_pending(&p->timer) ?
3492 time_after(p->timer.expires, now + max_delay) :
3493 try_to_del_timer_sync(&p->timer) >= 0 &&
3494 (brmctx->multicast_igmp_version == 2 ||
3495 p->filter_mode == MCAST_EXCLUDE))
3496 mod_timer(&p->timer, now + max_delay);
3497 }
3498
3499out:
3500 spin_unlock(&brmctx->br->multicast_lock);
3501}
3502
3503#if IS_ENABLED(CONFIG_IPV6)
3504static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx,
3505 struct net_bridge_mcast_port *pmctx,
3506 struct sk_buff *skb,
3507 u16 vid)
3508{
3509 unsigned int transport_len = ipv6_transport_len(skb);
3510 struct mld_msg *mld;
3511 struct net_bridge_mdb_entry *mp;
3512 struct mld2_query *mld2q;
3513 struct net_bridge_port_group *p;
3514 struct net_bridge_port_group __rcu **pp;
3515 struct br_ip saddr = {};
3516 unsigned long max_delay;
3517 unsigned long now = jiffies;
3518 unsigned int offset = skb_transport_offset(skb);
3519 const struct in6_addr *group = NULL;
3520 bool is_general_query;
3521 int err = 0;
3522
3523 spin_lock(&brmctx->br->multicast_lock);
3524 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3525 goto out;
3526
3527 if (transport_len == sizeof(*mld)) {
3528 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
3529 err = -EINVAL;
3530 goto out;
3531 }
3532 mld = (struct mld_msg *) icmp6_hdr(skb);
3533 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
3534 if (max_delay)
3535 group = &mld->mld_mca;
3536 } else {
3537 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
3538 err = -EINVAL;
3539 goto out;
3540 }
3541 mld2q = (struct mld2_query *)icmp6_hdr(skb);
3542 if (!mld2q->mld2q_nsrcs)
3543 group = &mld2q->mld2q_mca;
3544 if (brmctx->multicast_mld_version == 2 &&
3545 !ipv6_addr_any(&mld2q->mld2q_mca) &&
3546 mld2q->mld2q_suppress)
3547 goto out;
3548
3549 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
3550 }
3551
3552 is_general_query = group && ipv6_addr_any(group);
3553
3554 if (is_general_query) {
3555 saddr.proto = htons(ETH_P_IPV6);
3556 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
3557
3558 br_ip6_multicast_query_received(brmctx, pmctx,
3559 &brmctx->ip6_other_query,
3560 &saddr, max_delay);
3561 goto out;
3562 } else if (!group) {
3563 goto out;
3564 }
3565
3566 mp = br_mdb_ip6_get(brmctx->br, group, vid);
3567 if (!mp)
3568 goto out;
3569
3570 max_delay *= brmctx->multicast_last_member_count;
3571 if (mp->host_joined &&
3572 (timer_pending(&mp->timer) ?
3573 time_after(mp->timer.expires, now + max_delay) :
3574 try_to_del_timer_sync(&mp->timer) >= 0))
3575 mod_timer(&mp->timer, now + max_delay);
3576
3577 for (pp = &mp->ports;
3578 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3579 pp = &p->next) {
3580 if (timer_pending(&p->timer) ?
3581 time_after(p->timer.expires, now + max_delay) :
3582 try_to_del_timer_sync(&p->timer) >= 0 &&
3583 (brmctx->multicast_mld_version == 1 ||
3584 p->filter_mode == MCAST_EXCLUDE))
3585 mod_timer(&p->timer, now + max_delay);
3586 }
3587
3588out:
3589 spin_unlock(&brmctx->br->multicast_lock);
3590 return err;
3591}
3592#endif
3593
3594static void
3595br_multicast_leave_group(struct net_bridge_mcast *brmctx,
3596 struct net_bridge_mcast_port *pmctx,
3597 struct br_ip *group,
3598 struct bridge_mcast_other_query *other_query,
3599 struct bridge_mcast_own_query *own_query,
3600 const unsigned char *src)
3601{
3602 struct net_bridge_mdb_entry *mp;
3603 struct net_bridge_port_group *p;
3604 unsigned long now;
3605 unsigned long time;
3606
3607 spin_lock(&brmctx->br->multicast_lock);
3608 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3609 goto out;
3610
3611 mp = br_mdb_ip_get(brmctx->br, group);
3612 if (!mp)
3613 goto out;
3614
3615 if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) {
3616 struct net_bridge_port_group __rcu **pp;
3617
3618 for (pp = &mp->ports;
3619 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3620 pp = &p->next) {
3621 if (!br_port_group_equal(p, pmctx->port, src))
3622 continue;
3623
3624 if (p->flags & MDB_PG_FLAGS_PERMANENT)
3625 break;
3626
3627 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
3628 br_multicast_del_pg(mp, p, pp);
3629 }
3630 goto out;
3631 }
3632
3633 if (timer_pending(&other_query->timer))
3634 goto out;
3635
3636 if (brmctx->multicast_querier) {
3637 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr,
3638 false, 0, NULL);
3639
3640 time = jiffies + brmctx->multicast_last_member_count *
3641 brmctx->multicast_last_member_interval;
3642
3643 mod_timer(&own_query->timer, time);
3644
3645 for (p = mlock_dereference(mp->ports, brmctx->br);
3646 p != NULL && pmctx != NULL;
3647 p = mlock_dereference(p->next, brmctx->br)) {
3648 if (!br_port_group_equal(p, pmctx->port, src))
3649 continue;
3650
3651 if (!hlist_unhashed(&p->mglist) &&
3652 (timer_pending(&p->timer) ?
3653 time_after(p->timer.expires, time) :
3654 try_to_del_timer_sync(&p->timer) >= 0)) {
3655 mod_timer(&p->timer, time);
3656 }
3657
3658 break;
3659 }
3660 }
3661
3662 now = jiffies;
3663 time = now + brmctx->multicast_last_member_count *
3664 brmctx->multicast_last_member_interval;
3665
3666 if (!pmctx) {
3667 if (mp->host_joined &&
3668 (timer_pending(&mp->timer) ?
3669 time_after(mp->timer.expires, time) :
3670 try_to_del_timer_sync(&mp->timer) >= 0)) {
3671 mod_timer(&mp->timer, time);
3672 }
3673
3674 goto out;
3675 }
3676
3677 for (p = mlock_dereference(mp->ports, brmctx->br);
3678 p != NULL;
3679 p = mlock_dereference(p->next, brmctx->br)) {
3680 if (p->key.port != pmctx->port)
3681 continue;
3682
3683 if (!hlist_unhashed(&p->mglist) &&
3684 (timer_pending(&p->timer) ?
3685 time_after(p->timer.expires, time) :
3686 try_to_del_timer_sync(&p->timer) >= 0)) {
3687 mod_timer(&p->timer, time);
3688 }
3689
3690 break;
3691 }
3692out:
3693 spin_unlock(&brmctx->br->multicast_lock);
3694}
3695
3696static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
3697 struct net_bridge_mcast_port *pmctx,
3698 __be32 group,
3699 __u16 vid,
3700 const unsigned char *src)
3701{
3702 struct br_ip br_group;
3703 struct bridge_mcast_own_query *own_query;
3704
3705 if (ipv4_is_local_multicast(group))
3706 return;
3707
3708 own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query;
3709
3710 memset(&br_group, 0, sizeof(br_group));
3711 br_group.dst.ip4 = group;
3712 br_group.proto = htons(ETH_P_IP);
3713 br_group.vid = vid;
3714
3715 br_multicast_leave_group(brmctx, pmctx, &br_group,
3716 &brmctx->ip4_other_query,
3717 own_query, src);
3718}
3719
3720#if IS_ENABLED(CONFIG_IPV6)
3721static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
3722 struct net_bridge_mcast_port *pmctx,
3723 const struct in6_addr *group,
3724 __u16 vid,
3725 const unsigned char *src)
3726{
3727 struct br_ip br_group;
3728 struct bridge_mcast_own_query *own_query;
3729
3730 if (ipv6_addr_is_ll_all_nodes(group))
3731 return;
3732
3733 own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query;
3734
3735 memset(&br_group, 0, sizeof(br_group));
3736 br_group.dst.ip6 = *group;
3737 br_group.proto = htons(ETH_P_IPV6);
3738 br_group.vid = vid;
3739
3740 br_multicast_leave_group(brmctx, pmctx, &br_group,
3741 &brmctx->ip6_other_query,
3742 own_query, src);
3743}
3744#endif
3745
3746static void br_multicast_err_count(const struct net_bridge *br,
3747 const struct net_bridge_port *p,
3748 __be16 proto)
3749{
3750 struct bridge_mcast_stats __percpu *stats;
3751 struct bridge_mcast_stats *pstats;
3752
3753 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
3754 return;
3755
3756 if (p)
3757 stats = p->mcast_stats;
3758 else
3759 stats = br->mcast_stats;
3760 if (WARN_ON(!stats))
3761 return;
3762
3763 pstats = this_cpu_ptr(stats);
3764
3765 u64_stats_update_begin(&pstats->syncp);
3766 switch (proto) {
3767 case htons(ETH_P_IP):
3768 pstats->mstats.igmp_parse_errors++;
3769 break;
3770#if IS_ENABLED(CONFIG_IPV6)
3771 case htons(ETH_P_IPV6):
3772 pstats->mstats.mld_parse_errors++;
3773 break;
3774#endif
3775 }
3776 u64_stats_update_end(&pstats->syncp);
3777}
3778
3779static void br_multicast_pim(struct net_bridge_mcast *brmctx,
3780 struct net_bridge_mcast_port *pmctx,
3781 const struct sk_buff *skb)
3782{
3783 unsigned int offset = skb_transport_offset(skb);
3784 struct pimhdr *pimhdr, _pimhdr;
3785
3786 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
3787 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
3788 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
3789 return;
3790
3791 spin_lock(&brmctx->br->multicast_lock);
3792 br_ip4_multicast_mark_router(brmctx, pmctx);
3793 spin_unlock(&brmctx->br->multicast_lock);
3794}
3795
3796static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3797 struct net_bridge_mcast_port *pmctx,
3798 struct sk_buff *skb)
3799{
3800 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3801 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3802 return -ENOMSG;
3803
3804 spin_lock(&brmctx->br->multicast_lock);
3805 br_ip4_multicast_mark_router(brmctx, pmctx);
3806 spin_unlock(&brmctx->br->multicast_lock);
3807
3808 return 0;
3809}
3810
3811static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
3812 struct net_bridge_mcast_port *pmctx,
3813 struct sk_buff *skb,
3814 u16 vid)
3815{
3816 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
3817 const unsigned char *src;
3818 struct igmphdr *ih;
3819 int err;
3820
3821 err = ip_mc_check_igmp(skb);
3822
3823 if (err == -ENOMSG) {
3824 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
3825 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3826 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3827 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
3828 br_multicast_pim(brmctx, pmctx, skb);
3829 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
3830 br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb);
3831 }
3832
3833 return 0;
3834 } else if (err < 0) {
3835 br_multicast_err_count(brmctx->br, p, skb->protocol);
3836 return err;
3837 }
3838
3839 ih = igmp_hdr(skb);
3840 src = eth_hdr(skb)->h_source;
3841 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
3842
3843 switch (ih->type) {
3844 case IGMP_HOST_MEMBERSHIP_REPORT:
3845 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3846 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3847 err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid,
3848 src, true);
3849 break;
3850 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3851 err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid);
3852 break;
3853 case IGMP_HOST_MEMBERSHIP_QUERY:
3854 br_ip4_multicast_query(brmctx, pmctx, skb, vid);
3855 break;
3856 case IGMP_HOST_LEAVE_MESSAGE:
3857 br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src);
3858 break;
3859 }
3860
3861 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
3862 BR_MCAST_DIR_RX);
3863
3864 return err;
3865}
3866
3867#if IS_ENABLED(CONFIG_IPV6)
3868static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3869 struct net_bridge_mcast_port *pmctx,
3870 struct sk_buff *skb)
3871{
3872 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
3873 return;
3874
3875 spin_lock(&brmctx->br->multicast_lock);
3876 br_ip6_multicast_mark_router(brmctx, pmctx);
3877 spin_unlock(&brmctx->br->multicast_lock);
3878}
3879
3880static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
3881 struct net_bridge_mcast_port *pmctx,
3882 struct sk_buff *skb,
3883 u16 vid)
3884{
3885 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
3886 const unsigned char *src;
3887 struct mld_msg *mld;
3888 int err;
3889
3890 err = ipv6_mc_check_mld(skb);
3891
3892 if (err == -ENOMSG || err == -ENODATA) {
3893 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3894 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3895 if (err == -ENODATA &&
3896 ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
3897 br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
3898
3899 return 0;
3900 } else if (err < 0) {
3901 br_multicast_err_count(brmctx->br, p, skb->protocol);
3902 return err;
3903 }
3904
3905 mld = (struct mld_msg *)skb_transport_header(skb);
3906 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
3907
3908 switch (mld->mld_type) {
3909 case ICMPV6_MGM_REPORT:
3910 src = eth_hdr(skb)->h_source;
3911 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3912 err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca,
3913 vid, src, true);
3914 break;
3915 case ICMPV6_MLD2_REPORT:
3916 err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid);
3917 break;
3918 case ICMPV6_MGM_QUERY:
3919 err = br_ip6_multicast_query(brmctx, pmctx, skb, vid);
3920 break;
3921 case ICMPV6_MGM_REDUCTION:
3922 src = eth_hdr(skb)->h_source;
3923 br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid,
3924 src);
3925 break;
3926 }
3927
3928 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
3929 BR_MCAST_DIR_RX);
3930
3931 return err;
3932}
3933#endif
3934
3935int br_multicast_rcv(struct net_bridge_mcast **brmctx,
3936 struct net_bridge_mcast_port **pmctx,
3937 struct net_bridge_vlan *vlan,
3938 struct sk_buff *skb, u16 vid)
3939{
3940 int ret = 0;
3941
3942 BR_INPUT_SKB_CB(skb)->igmp = 0;
3943 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3944
3945 if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED))
3946 return 0;
3947
3948 if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) {
3949 const struct net_bridge_vlan *masterv;
3950
3951 /* the vlan has the master flag set only when transmitting
3952 * through the bridge device
3953 */
3954 if (br_vlan_is_master(vlan)) {
3955 masterv = vlan;
3956 *brmctx = &vlan->br_mcast_ctx;
3957 *pmctx = NULL;
3958 } else {
3959 masterv = vlan->brvlan;
3960 *brmctx = &vlan->brvlan->br_mcast_ctx;
3961 *pmctx = &vlan->port_mcast_ctx;
3962 }
3963
3964 if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
3965 return 0;
3966 }
3967
3968 switch (skb->protocol) {
3969 case htons(ETH_P_IP):
3970 ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid);
3971 break;
3972#if IS_ENABLED(CONFIG_IPV6)
3973 case htons(ETH_P_IPV6):
3974 ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid);
3975 break;
3976#endif
3977 }
3978
3979 return ret;
3980}
3981
3982static void br_multicast_query_expired(struct net_bridge_mcast *brmctx,
3983 struct bridge_mcast_own_query *query,
3984 struct bridge_mcast_querier *querier)
3985{
3986 spin_lock(&brmctx->br->multicast_lock);
3987 if (br_multicast_ctx_vlan_disabled(brmctx))
3988 goto out;
3989
3990 if (query->startup_sent < brmctx->multicast_startup_query_count)
3991 query->startup_sent++;
3992
3993 br_multicast_send_query(brmctx, NULL, query);
3994out:
3995 spin_unlock(&brmctx->br->multicast_lock);
3996}
3997
3998static void br_ip4_multicast_query_expired(struct timer_list *t)
3999{
4000 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
4001 ip4_own_query.timer);
4002
4003 br_multicast_query_expired(brmctx, &brmctx->ip4_own_query,
4004 &brmctx->ip4_querier);
4005}
4006
4007#if IS_ENABLED(CONFIG_IPV6)
4008static void br_ip6_multicast_query_expired(struct timer_list *t)
4009{
4010 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
4011 ip6_own_query.timer);
4012
4013 br_multicast_query_expired(brmctx, &brmctx->ip6_own_query,
4014 &brmctx->ip6_querier);
4015}
4016#endif
4017
4018static void br_multicast_gc_work(struct work_struct *work)
4019{
4020 struct net_bridge *br = container_of(work, struct net_bridge,
4021 mcast_gc_work);
4022 HLIST_HEAD(deleted_head);
4023
4024 spin_lock_bh(&br->multicast_lock);
4025 hlist_move_list(&br->mcast_gc_list, &deleted_head);
4026 spin_unlock_bh(&br->multicast_lock);
4027
4028 br_multicast_gc(&deleted_head);
4029}
4030
4031void br_multicast_ctx_init(struct net_bridge *br,
4032 struct net_bridge_vlan *vlan,
4033 struct net_bridge_mcast *brmctx)
4034{
4035 brmctx->br = br;
4036 brmctx->vlan = vlan;
4037 brmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4038 brmctx->multicast_last_member_count = 2;
4039 brmctx->multicast_startup_query_count = 2;
4040
4041 brmctx->multicast_last_member_interval = HZ;
4042 brmctx->multicast_query_response_interval = 10 * HZ;
4043 brmctx->multicast_startup_query_interval = 125 * HZ / 4;
4044 brmctx->multicast_query_interval = 125 * HZ;
4045 brmctx->multicast_querier_interval = 255 * HZ;
4046 brmctx->multicast_membership_interval = 260 * HZ;
4047
4048 brmctx->ip4_querier.port_ifidx = 0;
4049 seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock);
4050 brmctx->multicast_igmp_version = 2;
4051#if IS_ENABLED(CONFIG_IPV6)
4052 brmctx->multicast_mld_version = 1;
4053 brmctx->ip6_querier.port_ifidx = 0;
4054 seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock);
4055#endif
4056
4057 timer_setup(&brmctx->ip4_mc_router_timer,
4058 br_ip4_multicast_local_router_expired, 0);
4059 timer_setup(&brmctx->ip4_other_query.timer,
4060 br_ip4_multicast_querier_expired, 0);
4061 timer_setup(&brmctx->ip4_other_query.delay_timer,
4062 br_multicast_query_delay_expired, 0);
4063 timer_setup(&brmctx->ip4_own_query.timer,
4064 br_ip4_multicast_query_expired, 0);
4065#if IS_ENABLED(CONFIG_IPV6)
4066 timer_setup(&brmctx->ip6_mc_router_timer,
4067 br_ip6_multicast_local_router_expired, 0);
4068 timer_setup(&brmctx->ip6_other_query.timer,
4069 br_ip6_multicast_querier_expired, 0);
4070 timer_setup(&brmctx->ip6_other_query.delay_timer,
4071 br_multicast_query_delay_expired, 0);
4072 timer_setup(&brmctx->ip6_own_query.timer,
4073 br_ip6_multicast_query_expired, 0);
4074#endif
4075}
4076
4077void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
4078{
4079 __br_multicast_stop(brmctx);
4080}
4081
4082void br_multicast_init(struct net_bridge *br)
4083{
4084 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
4085
4086 br_multicast_ctx_init(br, NULL, &br->multicast_ctx);
4087
4088 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
4089 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
4090
4091 spin_lock_init(&br->multicast_lock);
4092 INIT_HLIST_HEAD(&br->mdb_list);
4093 INIT_HLIST_HEAD(&br->mcast_gc_list);
4094 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
4095}
4096
4097static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
4098{
4099 struct in_device *in_dev = in_dev_get(br->dev);
4100
4101 if (!in_dev)
4102 return;
4103
4104 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4105 in_dev_put(in_dev);
4106}
4107
4108#if IS_ENABLED(CONFIG_IPV6)
4109static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
4110{
4111 struct in6_addr addr;
4112
4113 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
4114 ipv6_dev_mc_inc(br->dev, &addr);
4115}
4116#else
4117static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
4118{
4119}
4120#endif
4121
4122void br_multicast_join_snoopers(struct net_bridge *br)
4123{
4124 br_ip4_multicast_join_snoopers(br);
4125 br_ip6_multicast_join_snoopers(br);
4126}
4127
4128static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
4129{
4130 struct in_device *in_dev = in_dev_get(br->dev);
4131
4132 if (WARN_ON(!in_dev))
4133 return;
4134
4135 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4136 in_dev_put(in_dev);
4137}
4138
4139#if IS_ENABLED(CONFIG_IPV6)
4140static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
4141{
4142 struct in6_addr addr;
4143
4144 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
4145 ipv6_dev_mc_dec(br->dev, &addr);
4146}
4147#else
4148static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
4149{
4150}
4151#endif
4152
4153void br_multicast_leave_snoopers(struct net_bridge *br)
4154{
4155 br_ip4_multicast_leave_snoopers(br);
4156 br_ip6_multicast_leave_snoopers(br);
4157}
4158
4159static void __br_multicast_open_query(struct net_bridge *br,
4160 struct bridge_mcast_own_query *query)
4161{
4162 query->startup_sent = 0;
4163
4164 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
4165 return;
4166
4167 mod_timer(&query->timer, jiffies);
4168}
4169
4170static void __br_multicast_open(struct net_bridge_mcast *brmctx)
4171{
4172 __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query);
4173#if IS_ENABLED(CONFIG_IPV6)
4174 __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query);
4175#endif
4176}
4177
4178void br_multicast_open(struct net_bridge *br)
4179{
4180 ASSERT_RTNL();
4181
4182 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4183 struct net_bridge_vlan_group *vg;
4184 struct net_bridge_vlan *vlan;
4185
4186 vg = br_vlan_group(br);
4187 if (vg) {
4188 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4189 struct net_bridge_mcast *brmctx;
4190
4191 brmctx = &vlan->br_mcast_ctx;
4192 if (br_vlan_is_brentry(vlan) &&
4193 !br_multicast_ctx_vlan_disabled(brmctx))
4194 __br_multicast_open(&vlan->br_mcast_ctx);
4195 }
4196 }
4197 } else {
4198 __br_multicast_open(&br->multicast_ctx);
4199 }
4200}
4201
4202static void __br_multicast_stop(struct net_bridge_mcast *brmctx)
4203{
4204 del_timer_sync(&brmctx->ip4_mc_router_timer);
4205 del_timer_sync(&brmctx->ip4_other_query.timer);
4206 del_timer_sync(&brmctx->ip4_other_query.delay_timer);
4207 del_timer_sync(&brmctx->ip4_own_query.timer);
4208#if IS_ENABLED(CONFIG_IPV6)
4209 del_timer_sync(&brmctx->ip6_mc_router_timer);
4210 del_timer_sync(&brmctx->ip6_other_query.timer);
4211 del_timer_sync(&brmctx->ip6_other_query.delay_timer);
4212 del_timer_sync(&brmctx->ip6_own_query.timer);
4213#endif
4214}
4215
4216void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on)
4217{
4218 struct net_bridge *br;
4219
4220 /* it's okay to check for the flag without the multicast lock because it
4221 * can only change under RTNL -> multicast_lock, we need the latter to
4222 * sync with timers and packets
4223 */
4224 if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED))
4225 return;
4226
4227 if (br_vlan_is_master(vlan)) {
4228 br = vlan->br;
4229
4230 if (!br_vlan_is_brentry(vlan) ||
4231 (on &&
4232 br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx)))
4233 return;
4234
4235 spin_lock_bh(&br->multicast_lock);
4236 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4237 spin_unlock_bh(&br->multicast_lock);
4238
4239 if (on)
4240 __br_multicast_open(&vlan->br_mcast_ctx);
4241 else
4242 __br_multicast_stop(&vlan->br_mcast_ctx);
4243 } else {
4244 struct net_bridge_mcast *brmctx;
4245
4246 brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx);
4247 if (on && br_multicast_ctx_vlan_global_disabled(brmctx))
4248 return;
4249
4250 br = vlan->port->br;
4251 spin_lock_bh(&br->multicast_lock);
4252 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4253 if (on)
4254 __br_multicast_enable_port_ctx(&vlan->port_mcast_ctx);
4255 else
4256 __br_multicast_disable_port_ctx(&vlan->port_mcast_ctx);
4257 spin_unlock_bh(&br->multicast_lock);
4258 }
4259}
4260
4261static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on)
4262{
4263 struct net_bridge_port *p;
4264
4265 if (WARN_ON_ONCE(!br_vlan_is_master(vlan)))
4266 return;
4267
4268 list_for_each_entry(p, &vlan->br->port_list, list) {
4269 struct net_bridge_vlan *vport;
4270
4271 vport = br_vlan_find(nbp_vlan_group(p), vlan->vid);
4272 if (!vport)
4273 continue;
4274 br_multicast_toggle_one_vlan(vport, on);
4275 }
4276
4277 if (br_vlan_is_brentry(vlan))
4278 br_multicast_toggle_one_vlan(vlan, on);
4279}
4280
4281int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
4282 struct netlink_ext_ack *extack)
4283{
4284 struct net_bridge_vlan_group *vg;
4285 struct net_bridge_vlan *vlan;
4286 struct net_bridge_port *p;
4287
4288 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on)
4289 return 0;
4290
4291 if (on && !br_opt_get(br, BROPT_VLAN_ENABLED)) {
4292 NL_SET_ERR_MSG_MOD(extack, "Cannot enable multicast vlan snooping with vlan filtering disabled");
4293 return -EINVAL;
4294 }
4295
4296 vg = br_vlan_group(br);
4297 if (!vg)
4298 return 0;
4299
4300 br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on);
4301
4302 /* disable/enable non-vlan mcast contexts based on vlan snooping */
4303 if (on)
4304 __br_multicast_stop(&br->multicast_ctx);
4305 else
4306 __br_multicast_open(&br->multicast_ctx);
4307 list_for_each_entry(p, &br->port_list, list) {
4308 if (on)
4309 br_multicast_disable_port(p);
4310 else
4311 br_multicast_enable_port(p);
4312 }
4313
4314 list_for_each_entry(vlan, &vg->vlan_list, vlist)
4315 br_multicast_toggle_vlan(vlan, on);
4316
4317 return 0;
4318}
4319
4320bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on)
4321{
4322 ASSERT_RTNL();
4323
4324 /* BR_VLFLAG_GLOBAL_MCAST_ENABLED relies on eventual consistency and
4325 * requires only RTNL to change
4326 */
4327 if (on == !!(vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
4328 return false;
4329
4330 vlan->priv_flags ^= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
4331 br_multicast_toggle_vlan(vlan, on);
4332
4333 return true;
4334}
4335
4336void br_multicast_stop(struct net_bridge *br)
4337{
4338 ASSERT_RTNL();
4339
4340 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4341 struct net_bridge_vlan_group *vg;
4342 struct net_bridge_vlan *vlan;
4343
4344 vg = br_vlan_group(br);
4345 if (vg) {
4346 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4347 struct net_bridge_mcast *brmctx;
4348
4349 brmctx = &vlan->br_mcast_ctx;
4350 if (br_vlan_is_brentry(vlan) &&
4351 !br_multicast_ctx_vlan_disabled(brmctx))
4352 __br_multicast_stop(&vlan->br_mcast_ctx);
4353 }
4354 }
4355 } else {
4356 __br_multicast_stop(&br->multicast_ctx);
4357 }
4358}
4359
4360void br_multicast_dev_del(struct net_bridge *br)
4361{
4362 struct net_bridge_mdb_entry *mp;
4363 HLIST_HEAD(deleted_head);
4364 struct hlist_node *tmp;
4365
4366 spin_lock_bh(&br->multicast_lock);
4367 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
4368 br_multicast_del_mdb_entry(mp);
4369 hlist_move_list(&br->mcast_gc_list, &deleted_head);
4370 spin_unlock_bh(&br->multicast_lock);
4371
4372 br_multicast_ctx_deinit(&br->multicast_ctx);
4373 br_multicast_gc(&deleted_head);
4374 cancel_work_sync(&br->mcast_gc_work);
4375
4376 rcu_barrier();
4377}
4378
4379int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val)
4380{
4381 int err = -EINVAL;
4382
4383 spin_lock_bh(&brmctx->br->multicast_lock);
4384
4385 switch (val) {
4386 case MDB_RTR_TYPE_DISABLED:
4387 case MDB_RTR_TYPE_PERM:
4388 br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM);
4389 del_timer(&brmctx->ip4_mc_router_timer);
4390#if IS_ENABLED(CONFIG_IPV6)
4391 del_timer(&brmctx->ip6_mc_router_timer);
4392#endif
4393 brmctx->multicast_router = val;
4394 err = 0;
4395 break;
4396 case MDB_RTR_TYPE_TEMP_QUERY:
4397 if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
4398 br_mc_router_state_change(brmctx->br, false);
4399 brmctx->multicast_router = val;
4400 err = 0;
4401 break;
4402 }
4403
4404 spin_unlock_bh(&brmctx->br->multicast_lock);
4405
4406 return err;
4407}
4408
4409static void
4410br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted)
4411{
4412 if (!deleted)
4413 return;
4414
4415 /* For backwards compatibility for now, only notify if there is
4416 * no multicast router anymore for both IPv4 and IPv6.
4417 */
4418 if (!hlist_unhashed(&pmctx->ip4_rlist))
4419 return;
4420#if IS_ENABLED(CONFIG_IPV6)
4421 if (!hlist_unhashed(&pmctx->ip6_rlist))
4422 return;
4423#endif
4424
4425 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB);
4426 br_port_mc_router_state_change(pmctx->port, false);
4427
4428 /* don't allow timer refresh */
4429 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP)
4430 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4431}
4432
4433int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
4434 unsigned long val)
4435{
4436 struct net_bridge_mcast *brmctx;
4437 unsigned long now = jiffies;
4438 int err = -EINVAL;
4439 bool del = false;
4440
4441 brmctx = br_multicast_port_ctx_get_global(pmctx);
4442 spin_lock_bh(&brmctx->br->multicast_lock);
4443 if (pmctx->multicast_router == val) {
4444 /* Refresh the temp router port timer */
4445 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) {
4446 mod_timer(&pmctx->ip4_mc_router_timer,
4447 now + brmctx->multicast_querier_interval);
4448#if IS_ENABLED(CONFIG_IPV6)
4449 mod_timer(&pmctx->ip6_mc_router_timer,
4450 now + brmctx->multicast_querier_interval);
4451#endif
4452 }
4453 err = 0;
4454 goto unlock;
4455 }
4456 switch (val) {
4457 case MDB_RTR_TYPE_DISABLED:
4458 pmctx->multicast_router = MDB_RTR_TYPE_DISABLED;
4459 del |= br_ip4_multicast_rport_del(pmctx);
4460 del_timer(&pmctx->ip4_mc_router_timer);
4461 del |= br_ip6_multicast_rport_del(pmctx);
4462#if IS_ENABLED(CONFIG_IPV6)
4463 del_timer(&pmctx->ip6_mc_router_timer);
4464#endif
4465 br_multicast_rport_del_notify(pmctx, del);
4466 break;
4467 case MDB_RTR_TYPE_TEMP_QUERY:
4468 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4469 del |= br_ip4_multicast_rport_del(pmctx);
4470 del |= br_ip6_multicast_rport_del(pmctx);
4471 br_multicast_rport_del_notify(pmctx, del);
4472 break;
4473 case MDB_RTR_TYPE_PERM:
4474 pmctx->multicast_router = MDB_RTR_TYPE_PERM;
4475 del_timer(&pmctx->ip4_mc_router_timer);
4476 br_ip4_multicast_add_router(brmctx, pmctx);
4477#if IS_ENABLED(CONFIG_IPV6)
4478 del_timer(&pmctx->ip6_mc_router_timer);
4479#endif
4480 br_ip6_multicast_add_router(brmctx, pmctx);
4481 break;
4482 case MDB_RTR_TYPE_TEMP:
4483 pmctx->multicast_router = MDB_RTR_TYPE_TEMP;
4484 br_ip4_multicast_mark_router(brmctx, pmctx);
4485 br_ip6_multicast_mark_router(brmctx, pmctx);
4486 break;
4487 default:
4488 goto unlock;
4489 }
4490 err = 0;
4491unlock:
4492 spin_unlock_bh(&brmctx->br->multicast_lock);
4493
4494 return err;
4495}
4496
4497int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router)
4498{
4499 int err;
4500
4501 if (br_vlan_is_master(v))
4502 err = br_multicast_set_router(&v->br_mcast_ctx, mcast_router);
4503 else
4504 err = br_multicast_set_port_router(&v->port_mcast_ctx,
4505 mcast_router);
4506
4507 return err;
4508}
4509
4510static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
4511 struct bridge_mcast_own_query *query)
4512{
4513 struct net_bridge_port *port;
4514
4515 if (!br_multicast_ctx_matches_vlan_snooping(brmctx))
4516 return;
4517
4518 __br_multicast_open_query(brmctx->br, query);
4519
4520 rcu_read_lock();
4521 list_for_each_entry_rcu(port, &brmctx->br->port_list, list) {
4522 struct bridge_mcast_own_query *ip4_own_query;
4523#if IS_ENABLED(CONFIG_IPV6)
4524 struct bridge_mcast_own_query *ip6_own_query;
4525#endif
4526
4527 if (br_multicast_port_ctx_state_stopped(&port->multicast_ctx))
4528 continue;
4529
4530 if (br_multicast_ctx_is_vlan(brmctx)) {
4531 struct net_bridge_vlan *vlan;
4532
4533 vlan = br_vlan_find(nbp_vlan_group_rcu(port),
4534 brmctx->vlan->vid);
4535 if (!vlan ||
4536 br_multicast_port_ctx_state_stopped(&vlan->port_mcast_ctx))
4537 continue;
4538
4539 ip4_own_query = &vlan->port_mcast_ctx.ip4_own_query;
4540#if IS_ENABLED(CONFIG_IPV6)
4541 ip6_own_query = &vlan->port_mcast_ctx.ip6_own_query;
4542#endif
4543 } else {
4544 ip4_own_query = &port->multicast_ctx.ip4_own_query;
4545#if IS_ENABLED(CONFIG_IPV6)
4546 ip6_own_query = &port->multicast_ctx.ip6_own_query;
4547#endif
4548 }
4549
4550 if (query == &brmctx->ip4_own_query)
4551 br_multicast_enable(ip4_own_query);
4552#if IS_ENABLED(CONFIG_IPV6)
4553 else
4554 br_multicast_enable(ip6_own_query);
4555#endif
4556 }
4557 rcu_read_unlock();
4558}
4559
4560int br_multicast_toggle(struct net_bridge *br, unsigned long val,
4561 struct netlink_ext_ack *extack)
4562{
4563 struct net_bridge_port *port;
4564 bool change_snoopers = false;
4565 int err = 0;
4566
4567 spin_lock_bh(&br->multicast_lock);
4568 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
4569 goto unlock;
4570
4571 err = br_mc_disabled_update(br->dev, val, extack);
4572 if (err == -EOPNOTSUPP)
4573 err = 0;
4574 if (err)
4575 goto unlock;
4576
4577 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4578 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
4579 change_snoopers = true;
4580 goto unlock;
4581 }
4582
4583 if (!netif_running(br->dev))
4584 goto unlock;
4585
4586 br_multicast_open(br);
4587 list_for_each_entry(port, &br->port_list, list)
4588 __br_multicast_enable_port_ctx(&port->multicast_ctx);
4589
4590 change_snoopers = true;
4591
4592unlock:
4593 spin_unlock_bh(&br->multicast_lock);
4594
4595 /* br_multicast_join_snoopers has the potential to cause
4596 * an MLD Report/Leave to be delivered to br_multicast_rcv,
4597 * which would in turn call br_multicast_add_group, which would
4598 * attempt to acquire multicast_lock. This function should be
4599 * called after the lock has been released to avoid deadlocks on
4600 * multicast_lock.
4601 *
4602 * br_multicast_leave_snoopers does not have the problem since
4603 * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
4604 * returns without calling br_multicast_ipv4/6_rcv if it's not
4605 * enabled. Moved both functions out just for symmetry.
4606 */
4607 if (change_snoopers) {
4608 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
4609 br_multicast_join_snoopers(br);
4610 else
4611 br_multicast_leave_snoopers(br);
4612 }
4613
4614 return err;
4615}
4616
4617bool br_multicast_enabled(const struct net_device *dev)
4618{
4619 struct net_bridge *br = netdev_priv(dev);
4620
4621 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
4622}
4623EXPORT_SYMBOL_GPL(br_multicast_enabled);
4624
4625bool br_multicast_router(const struct net_device *dev)
4626{
4627 struct net_bridge *br = netdev_priv(dev);
4628 bool is_router;
4629
4630 spin_lock_bh(&br->multicast_lock);
4631 is_router = br_multicast_is_router(&br->multicast_ctx, NULL);
4632 spin_unlock_bh(&br->multicast_lock);
4633 return is_router;
4634}
4635EXPORT_SYMBOL_GPL(br_multicast_router);
4636
4637int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val)
4638{
4639 unsigned long max_delay;
4640
4641 val = !!val;
4642
4643 spin_lock_bh(&brmctx->br->multicast_lock);
4644 if (brmctx->multicast_querier == val)
4645 goto unlock;
4646
4647 WRITE_ONCE(brmctx->multicast_querier, val);
4648 if (!val)
4649 goto unlock;
4650
4651 max_delay = brmctx->multicast_query_response_interval;
4652
4653 if (!timer_pending(&brmctx->ip4_other_query.timer))
4654 mod_timer(&brmctx->ip4_other_query.delay_timer,
4655 jiffies + max_delay);
4656
4657 br_multicast_start_querier(brmctx, &brmctx->ip4_own_query);
4658
4659#if IS_ENABLED(CONFIG_IPV6)
4660 if (!timer_pending(&brmctx->ip6_other_query.timer))
4661 mod_timer(&brmctx->ip6_other_query.delay_timer,
4662 jiffies + max_delay);
4663
4664 br_multicast_start_querier(brmctx, &brmctx->ip6_own_query);
4665#endif
4666
4667unlock:
4668 spin_unlock_bh(&brmctx->br->multicast_lock);
4669
4670 return 0;
4671}
4672
4673int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
4674 unsigned long val)
4675{
4676 /* Currently we support only version 2 and 3 */
4677 switch (val) {
4678 case 2:
4679 case 3:
4680 break;
4681 default:
4682 return -EINVAL;
4683 }
4684
4685 spin_lock_bh(&brmctx->br->multicast_lock);
4686 brmctx->multicast_igmp_version = val;
4687 spin_unlock_bh(&brmctx->br->multicast_lock);
4688
4689 return 0;
4690}
4691
4692#if IS_ENABLED(CONFIG_IPV6)
4693int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
4694 unsigned long val)
4695{
4696 /* Currently we support version 1 and 2 */
4697 switch (val) {
4698 case 1:
4699 case 2:
4700 break;
4701 default:
4702 return -EINVAL;
4703 }
4704
4705 spin_lock_bh(&brmctx->br->multicast_lock);
4706 brmctx->multicast_mld_version = val;
4707 spin_unlock_bh(&brmctx->br->multicast_lock);
4708
4709 return 0;
4710}
4711#endif
4712
4713void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
4714 unsigned long val)
4715{
4716 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4717
4718 if (intvl_jiffies < BR_MULTICAST_QUERY_INTVL_MIN) {
4719 br_info(brmctx->br,
4720 "trying to set multicast query interval below minimum, setting to %lu (%ums)\n",
4721 jiffies_to_clock_t(BR_MULTICAST_QUERY_INTVL_MIN),
4722 jiffies_to_msecs(BR_MULTICAST_QUERY_INTVL_MIN));
4723 intvl_jiffies = BR_MULTICAST_QUERY_INTVL_MIN;
4724 }
4725
4726 brmctx->multicast_query_interval = intvl_jiffies;
4727}
4728
4729void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
4730 unsigned long val)
4731{
4732 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4733
4734 if (intvl_jiffies < BR_MULTICAST_STARTUP_QUERY_INTVL_MIN) {
4735 br_info(brmctx->br,
4736 "trying to set multicast startup query interval below minimum, setting to %lu (%ums)\n",
4737 jiffies_to_clock_t(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN),
4738 jiffies_to_msecs(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN));
4739 intvl_jiffies = BR_MULTICAST_STARTUP_QUERY_INTVL_MIN;
4740 }
4741
4742 brmctx->multicast_startup_query_interval = intvl_jiffies;
4743}
4744
4745/**
4746 * br_multicast_list_adjacent - Returns snooped multicast addresses
4747 * @dev: The bridge port adjacent to which to retrieve addresses
4748 * @br_ip_list: The list to store found, snooped multicast IP addresses in
4749 *
4750 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
4751 * snooping feature on all bridge ports of dev's bridge device, excluding
4752 * the addresses from dev itself.
4753 *
4754 * Returns the number of items added to br_ip_list.
4755 *
4756 * Notes:
4757 * - br_ip_list needs to be initialized by caller
4758 * - br_ip_list might contain duplicates in the end
4759 * (needs to be taken care of by caller)
4760 * - br_ip_list needs to be freed by caller
4761 */
4762int br_multicast_list_adjacent(struct net_device *dev,
4763 struct list_head *br_ip_list)
4764{
4765 struct net_bridge *br;
4766 struct net_bridge_port *port;
4767 struct net_bridge_port_group *group;
4768 struct br_ip_list *entry;
4769 int count = 0;
4770
4771 rcu_read_lock();
4772 if (!br_ip_list || !netif_is_bridge_port(dev))
4773 goto unlock;
4774
4775 port = br_port_get_rcu(dev);
4776 if (!port || !port->br)
4777 goto unlock;
4778
4779 br = port->br;
4780
4781 list_for_each_entry_rcu(port, &br->port_list, list) {
4782 if (!port->dev || port->dev == dev)
4783 continue;
4784
4785 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
4786 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
4787 if (!entry)
4788 goto unlock;
4789
4790 entry->addr = group->key.addr;
4791 list_add(&entry->list, br_ip_list);
4792 count++;
4793 }
4794 }
4795
4796unlock:
4797 rcu_read_unlock();
4798 return count;
4799}
4800EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
4801
4802/**
4803 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
4804 * @dev: The bridge port providing the bridge on which to check for a querier
4805 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4806 *
4807 * Checks whether the given interface has a bridge on top and if so returns
4808 * true if a valid querier exists anywhere on the bridged link layer.
4809 * Otherwise returns false.
4810 */
4811bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
4812{
4813 struct net_bridge *br;
4814 struct net_bridge_port *port;
4815 struct ethhdr eth;
4816 bool ret = false;
4817
4818 rcu_read_lock();
4819 if (!netif_is_bridge_port(dev))
4820 goto unlock;
4821
4822 port = br_port_get_rcu(dev);
4823 if (!port || !port->br)
4824 goto unlock;
4825
4826 br = port->br;
4827
4828 memset(ð, 0, sizeof(eth));
4829 eth.h_proto = htons(proto);
4830
4831 ret = br_multicast_querier_exists(&br->multicast_ctx, ð, NULL);
4832
4833unlock:
4834 rcu_read_unlock();
4835 return ret;
4836}
4837EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
4838
4839/**
4840 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
4841 * @dev: The bridge port adjacent to which to check for a querier
4842 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4843 *
4844 * Checks whether the given interface has a bridge on top and if so returns
4845 * true if a selected querier is behind one of the other ports of this
4846 * bridge. Otherwise returns false.
4847 */
4848bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
4849{
4850 struct net_bridge_mcast *brmctx;
4851 struct net_bridge *br;
4852 struct net_bridge_port *port;
4853 bool ret = false;
4854 int port_ifidx;
4855
4856 rcu_read_lock();
4857 if (!netif_is_bridge_port(dev))
4858 goto unlock;
4859
4860 port = br_port_get_rcu(dev);
4861 if (!port || !port->br)
4862 goto unlock;
4863
4864 br = port->br;
4865 brmctx = &br->multicast_ctx;
4866
4867 switch (proto) {
4868 case ETH_P_IP:
4869 port_ifidx = brmctx->ip4_querier.port_ifidx;
4870 if (!timer_pending(&brmctx->ip4_other_query.timer) ||
4871 port_ifidx == port->dev->ifindex)
4872 goto unlock;
4873 break;
4874#if IS_ENABLED(CONFIG_IPV6)
4875 case ETH_P_IPV6:
4876 port_ifidx = brmctx->ip6_querier.port_ifidx;
4877 if (!timer_pending(&brmctx->ip6_other_query.timer) ||
4878 port_ifidx == port->dev->ifindex)
4879 goto unlock;
4880 break;
4881#endif
4882 default:
4883 goto unlock;
4884 }
4885
4886 ret = true;
4887unlock:
4888 rcu_read_unlock();
4889 return ret;
4890}
4891EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
4892
4893/**
4894 * br_multicast_has_router_adjacent - Checks for a router behind a bridge port
4895 * @dev: The bridge port adjacent to which to check for a multicast router
4896 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4897 *
4898 * Checks whether the given interface has a bridge on top and if so returns
4899 * true if a multicast router is behind one of the other ports of this
4900 * bridge. Otherwise returns false.
4901 */
4902bool br_multicast_has_router_adjacent(struct net_device *dev, int proto)
4903{
4904 struct net_bridge_mcast_port *pmctx;
4905 struct net_bridge_mcast *brmctx;
4906 struct net_bridge_port *port;
4907 bool ret = false;
4908
4909 rcu_read_lock();
4910 port = br_port_get_check_rcu(dev);
4911 if (!port)
4912 goto unlock;
4913
4914 brmctx = &port->br->multicast_ctx;
4915 switch (proto) {
4916 case ETH_P_IP:
4917 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
4918 ip4_rlist) {
4919 if (pmctx->port == port)
4920 continue;
4921
4922 ret = true;
4923 goto unlock;
4924 }
4925 break;
4926#if IS_ENABLED(CONFIG_IPV6)
4927 case ETH_P_IPV6:
4928 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
4929 ip6_rlist) {
4930 if (pmctx->port == port)
4931 continue;
4932
4933 ret = true;
4934 goto unlock;
4935 }
4936 break;
4937#endif
4938 default:
4939 /* when compiled without IPv6 support, be conservative and
4940 * always assume presence of an IPv6 multicast router
4941 */
4942 ret = true;
4943 }
4944
4945unlock:
4946 rcu_read_unlock();
4947 return ret;
4948}
4949EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);
4950
4951static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
4952 const struct sk_buff *skb, u8 type, u8 dir)
4953{
4954 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
4955 __be16 proto = skb->protocol;
4956 unsigned int t_len;
4957
4958 u64_stats_update_begin(&pstats->syncp);
4959 switch (proto) {
4960 case htons(ETH_P_IP):
4961 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
4962 switch (type) {
4963 case IGMP_HOST_MEMBERSHIP_REPORT:
4964 pstats->mstats.igmp_v1reports[dir]++;
4965 break;
4966 case IGMPV2_HOST_MEMBERSHIP_REPORT:
4967 pstats->mstats.igmp_v2reports[dir]++;
4968 break;
4969 case IGMPV3_HOST_MEMBERSHIP_REPORT:
4970 pstats->mstats.igmp_v3reports[dir]++;
4971 break;
4972 case IGMP_HOST_MEMBERSHIP_QUERY:
4973 if (t_len != sizeof(struct igmphdr)) {
4974 pstats->mstats.igmp_v3queries[dir]++;
4975 } else {
4976 unsigned int offset = skb_transport_offset(skb);
4977 struct igmphdr *ih, _ihdr;
4978
4979 ih = skb_header_pointer(skb, offset,
4980 sizeof(_ihdr), &_ihdr);
4981 if (!ih)
4982 break;
4983 if (!ih->code)
4984 pstats->mstats.igmp_v1queries[dir]++;
4985 else
4986 pstats->mstats.igmp_v2queries[dir]++;
4987 }
4988 break;
4989 case IGMP_HOST_LEAVE_MESSAGE:
4990 pstats->mstats.igmp_leaves[dir]++;
4991 break;
4992 }
4993 break;
4994#if IS_ENABLED(CONFIG_IPV6)
4995 case htons(ETH_P_IPV6):
4996 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
4997 sizeof(struct ipv6hdr);
4998 t_len -= skb_network_header_len(skb);
4999 switch (type) {
5000 case ICMPV6_MGM_REPORT:
5001 pstats->mstats.mld_v1reports[dir]++;
5002 break;
5003 case ICMPV6_MLD2_REPORT:
5004 pstats->mstats.mld_v2reports[dir]++;
5005 break;
5006 case ICMPV6_MGM_QUERY:
5007 if (t_len != sizeof(struct mld_msg))
5008 pstats->mstats.mld_v2queries[dir]++;
5009 else
5010 pstats->mstats.mld_v1queries[dir]++;
5011 break;
5012 case ICMPV6_MGM_REDUCTION:
5013 pstats->mstats.mld_leaves[dir]++;
5014 break;
5015 }
5016 break;
5017#endif /* CONFIG_IPV6 */
5018 }
5019 u64_stats_update_end(&pstats->syncp);
5020}
5021
5022void br_multicast_count(struct net_bridge *br,
5023 const struct net_bridge_port *p,
5024 const struct sk_buff *skb, u8 type, u8 dir)
5025{
5026 struct bridge_mcast_stats __percpu *stats;
5027
5028 /* if multicast_disabled is true then igmp type can't be set */
5029 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
5030 return;
5031
5032 if (p)
5033 stats = p->mcast_stats;
5034 else
5035 stats = br->mcast_stats;
5036 if (WARN_ON(!stats))
5037 return;
5038
5039 br_mcast_stats_add(stats, skb, type, dir);
5040}
5041
5042int br_multicast_init_stats(struct net_bridge *br)
5043{
5044 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
5045 if (!br->mcast_stats)
5046 return -ENOMEM;
5047
5048 return 0;
5049}
5050
5051void br_multicast_uninit_stats(struct net_bridge *br)
5052{
5053 free_percpu(br->mcast_stats);
5054}
5055
5056/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
5057static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
5058{
5059 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
5060 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
5061}
5062
5063void br_multicast_get_stats(const struct net_bridge *br,
5064 const struct net_bridge_port *p,
5065 struct br_mcast_stats *dest)
5066{
5067 struct bridge_mcast_stats __percpu *stats;
5068 struct br_mcast_stats tdst;
5069 int i;
5070
5071 memset(dest, 0, sizeof(*dest));
5072 if (p)
5073 stats = p->mcast_stats;
5074 else
5075 stats = br->mcast_stats;
5076 if (WARN_ON(!stats))
5077 return;
5078
5079 memset(&tdst, 0, sizeof(tdst));
5080 for_each_possible_cpu(i) {
5081 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
5082 struct br_mcast_stats temp;
5083 unsigned int start;
5084
5085 do {
5086 start = u64_stats_fetch_begin(&cpu_stats->syncp);
5087 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
5088 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
5089
5090 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
5091 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
5092 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
5093 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
5094 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
5095 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
5096 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
5097 tdst.igmp_parse_errors += temp.igmp_parse_errors;
5098
5099 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
5100 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
5101 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
5102 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
5103 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
5104 tdst.mld_parse_errors += temp.mld_parse_errors;
5105 }
5106 memcpy(dest, &tdst, sizeof(*dest));
5107}
5108
5109int br_mdb_hash_init(struct net_bridge *br)
5110{
5111 int err;
5112
5113 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
5114 if (err)
5115 return err;
5116
5117 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
5118 if (err) {
5119 rhashtable_destroy(&br->sg_port_tbl);
5120 return err;
5121 }
5122
5123 return 0;
5124}
5125
5126void br_mdb_hash_fini(struct net_bridge *br)
5127{
5128 rhashtable_destroy(&br->sg_port_tbl);
5129 rhashtable_destroy(&br->mdb_hash_tbl);
5130}
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#include "br_private_mcast_eht.h"
37
38static const struct rhashtable_params br_mdb_rht_params = {
39 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
40 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
41 .key_len = sizeof(struct br_ip),
42 .automatic_shrinking = true,
43};
44
45static const struct rhashtable_params br_sg_port_rht_params = {
46 .head_offset = offsetof(struct net_bridge_port_group, rhnode),
47 .key_offset = offsetof(struct net_bridge_port_group, key),
48 .key_len = sizeof(struct net_bridge_port_group_sg_key),
49 .automatic_shrinking = true,
50};
51
52static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
53 struct bridge_mcast_own_query *query);
54static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
55 struct net_bridge_mcast_port *pmctx);
56static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
57 struct net_bridge_mcast_port *pmctx,
58 __be32 group,
59 __u16 vid,
60 const unsigned char *src);
61static void br_multicast_port_group_rexmit(struct timer_list *t);
62
63static void
64br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted);
65static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
66 struct net_bridge_mcast_port *pmctx);
67#if IS_ENABLED(CONFIG_IPV6)
68static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
69 struct net_bridge_mcast_port *pmctx,
70 const struct in6_addr *group,
71 __u16 vid, const unsigned char *src);
72#endif
73static struct net_bridge_port_group *
74__br_multicast_add_group(struct net_bridge_mcast *brmctx,
75 struct net_bridge_mcast_port *pmctx,
76 struct br_ip *group,
77 const unsigned char *src,
78 u8 filter_mode,
79 bool igmpv2_mldv1,
80 bool blocked);
81static void br_multicast_find_del_pg(struct net_bridge *br,
82 struct net_bridge_port_group *pg);
83static void __br_multicast_stop(struct net_bridge_mcast *brmctx);
84
85static int br_mc_disabled_update(struct net_device *dev, bool value,
86 struct netlink_ext_ack *extack);
87
88static struct net_bridge_port_group *
89br_sg_port_find(struct net_bridge *br,
90 struct net_bridge_port_group_sg_key *sg_p)
91{
92 lockdep_assert_held_once(&br->multicast_lock);
93
94 return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
95 br_sg_port_rht_params);
96}
97
98static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
99 struct br_ip *dst)
100{
101 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
102}
103
104struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
105 struct br_ip *dst)
106{
107 struct net_bridge_mdb_entry *ent;
108
109 lockdep_assert_held_once(&br->multicast_lock);
110
111 rcu_read_lock();
112 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
113 rcu_read_unlock();
114
115 return ent;
116}
117
118static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
119 __be32 dst, __u16 vid)
120{
121 struct br_ip br_dst;
122
123 memset(&br_dst, 0, sizeof(br_dst));
124 br_dst.dst.ip4 = dst;
125 br_dst.proto = htons(ETH_P_IP);
126 br_dst.vid = vid;
127
128 return br_mdb_ip_get(br, &br_dst);
129}
130
131#if IS_ENABLED(CONFIG_IPV6)
132static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
133 const struct in6_addr *dst,
134 __u16 vid)
135{
136 struct br_ip br_dst;
137
138 memset(&br_dst, 0, sizeof(br_dst));
139 br_dst.dst.ip6 = *dst;
140 br_dst.proto = htons(ETH_P_IPV6);
141 br_dst.vid = vid;
142
143 return br_mdb_ip_get(br, &br_dst);
144}
145#endif
146
147struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
148 struct sk_buff *skb, u16 vid)
149{
150 struct net_bridge *br = brmctx->br;
151 struct br_ip ip;
152
153 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
154 br_multicast_ctx_vlan_global_disabled(brmctx))
155 return NULL;
156
157 if (BR_INPUT_SKB_CB(skb)->igmp)
158 return NULL;
159
160 memset(&ip, 0, sizeof(ip));
161 ip.proto = skb->protocol;
162 ip.vid = vid;
163
164 switch (skb->protocol) {
165 case htons(ETH_P_IP):
166 ip.dst.ip4 = ip_hdr(skb)->daddr;
167 if (brmctx->multicast_igmp_version == 3) {
168 struct net_bridge_mdb_entry *mdb;
169
170 ip.src.ip4 = ip_hdr(skb)->saddr;
171 mdb = br_mdb_ip_get_rcu(br, &ip);
172 if (mdb)
173 return mdb;
174 ip.src.ip4 = 0;
175 }
176 break;
177#if IS_ENABLED(CONFIG_IPV6)
178 case htons(ETH_P_IPV6):
179 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
180 if (brmctx->multicast_mld_version == 2) {
181 struct net_bridge_mdb_entry *mdb;
182
183 ip.src.ip6 = ipv6_hdr(skb)->saddr;
184 mdb = br_mdb_ip_get_rcu(br, &ip);
185 if (mdb)
186 return mdb;
187 memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
188 }
189 break;
190#endif
191 default:
192 ip.proto = 0;
193 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
194 }
195
196 return br_mdb_ip_get_rcu(br, &ip);
197}
198
199/* IMPORTANT: this function must be used only when the contexts cannot be
200 * passed down (e.g. timer) and must be used for read-only purposes because
201 * the vlan snooping option can change, so it can return any context
202 * (non-vlan or vlan). Its initial intended purpose is to read timer values
203 * from the *current* context based on the option. At worst that could lead
204 * to inconsistent timers when the contexts are changed, i.e. src timer
205 * which needs to re-arm with a specific delay taken from the old context
206 */
207static struct net_bridge_mcast_port *
208br_multicast_pg_to_port_ctx(const struct net_bridge_port_group *pg)
209{
210 struct net_bridge_mcast_port *pmctx = &pg->key.port->multicast_ctx;
211 struct net_bridge_vlan *vlan;
212
213 lockdep_assert_held_once(&pg->key.port->br->multicast_lock);
214
215 /* if vlan snooping is disabled use the port's multicast context */
216 if (!pg->key.addr.vid ||
217 !br_opt_get(pg->key.port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED))
218 goto out;
219
220 /* locking is tricky here, due to different rules for multicast and
221 * vlans we need to take rcu to find the vlan and make sure it has
222 * the BR_VLFLAG_MCAST_ENABLED flag set, it can only change under
223 * multicast_lock which must be already held here, so the vlan's pmctx
224 * can safely be used on return
225 */
226 rcu_read_lock();
227 vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid);
228 if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx))
229 pmctx = &vlan->port_mcast_ctx;
230 else
231 pmctx = NULL;
232 rcu_read_unlock();
233out:
234 return pmctx;
235}
236
237/* when snooping we need to check if the contexts should be used
238 * in the following order:
239 * - if pmctx is non-NULL (port), check if it should be used
240 * - if pmctx is NULL (bridge), check if brmctx should be used
241 */
242static bool
243br_multicast_ctx_should_use(const struct net_bridge_mcast *brmctx,
244 const struct net_bridge_mcast_port *pmctx)
245{
246 if (!netif_running(brmctx->br->dev))
247 return false;
248
249 if (pmctx)
250 return !br_multicast_port_ctx_state_disabled(pmctx);
251 else
252 return !br_multicast_ctx_vlan_disabled(brmctx);
253}
254
255static bool br_port_group_equal(struct net_bridge_port_group *p,
256 struct net_bridge_port *port,
257 const unsigned char *src)
258{
259 if (p->key.port != port)
260 return false;
261
262 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
263 return true;
264
265 return ether_addr_equal(src, p->eth_addr);
266}
267
268static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx,
269 struct net_bridge_port_group *pg,
270 struct br_ip *sg_ip)
271{
272 struct net_bridge_port_group_sg_key sg_key;
273 struct net_bridge_port_group *src_pg;
274 struct net_bridge_mcast *brmctx;
275
276 memset(&sg_key, 0, sizeof(sg_key));
277 brmctx = br_multicast_port_ctx_get_global(pmctx);
278 sg_key.port = pg->key.port;
279 sg_key.addr = *sg_ip;
280 if (br_sg_port_find(brmctx->br, &sg_key))
281 return;
282
283 src_pg = __br_multicast_add_group(brmctx, pmctx,
284 sg_ip, pg->eth_addr,
285 MCAST_INCLUDE, false, false);
286 if (IS_ERR_OR_NULL(src_pg) ||
287 src_pg->rt_protocol != RTPROT_KERNEL)
288 return;
289
290 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
291}
292
293static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
294 struct br_ip *sg_ip)
295{
296 struct net_bridge_port_group_sg_key sg_key;
297 struct net_bridge *br = pg->key.port->br;
298 struct net_bridge_port_group *src_pg;
299
300 memset(&sg_key, 0, sizeof(sg_key));
301 sg_key.port = pg->key.port;
302 sg_key.addr = *sg_ip;
303 src_pg = br_sg_port_find(br, &sg_key);
304 if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
305 src_pg->rt_protocol != RTPROT_KERNEL)
306 return;
307
308 br_multicast_find_del_pg(br, src_pg);
309}
310
311/* When a port group transitions to (or is added as) EXCLUDE we need to add it
312 * to all other ports' S,G entries which are not blocked by the current group
313 * for proper replication, the assumption is that any S,G blocked entries
314 * are already added so the S,G,port lookup should skip them.
315 * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
316 * deleted we need to remove it from all ports' S,G entries where it was
317 * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
318 */
319void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
320 u8 filter_mode)
321{
322 struct net_bridge *br = pg->key.port->br;
323 struct net_bridge_port_group *pg_lst;
324 struct net_bridge_mcast_port *pmctx;
325 struct net_bridge_mdb_entry *mp;
326 struct br_ip sg_ip;
327
328 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
329 return;
330
331 mp = br_mdb_ip_get(br, &pg->key.addr);
332 if (!mp)
333 return;
334 pmctx = br_multicast_pg_to_port_ctx(pg);
335 if (!pmctx)
336 return;
337
338 memset(&sg_ip, 0, sizeof(sg_ip));
339 sg_ip = pg->key.addr;
340
341 for (pg_lst = mlock_dereference(mp->ports, br);
342 pg_lst;
343 pg_lst = mlock_dereference(pg_lst->next, br)) {
344 struct net_bridge_group_src *src_ent;
345
346 if (pg_lst == pg)
347 continue;
348 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
349 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
350 continue;
351 sg_ip.src = src_ent->addr.src;
352 switch (filter_mode) {
353 case MCAST_INCLUDE:
354 __fwd_del_star_excl(pg, &sg_ip);
355 break;
356 case MCAST_EXCLUDE:
357 __fwd_add_star_excl(pmctx, pg, &sg_ip);
358 break;
359 }
360 }
361 }
362}
363
364/* called when adding a new S,G with host_joined == false by default */
365static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
366 struct net_bridge_port_group *sg)
367{
368 struct net_bridge_mdb_entry *sg_mp;
369
370 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
371 return;
372 if (!star_mp->host_joined)
373 return;
374
375 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
376 if (!sg_mp)
377 return;
378 sg_mp->host_joined = true;
379}
380
381/* set the host_joined state of all of *,G's S,G entries */
382static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
383{
384 struct net_bridge *br = star_mp->br;
385 struct net_bridge_mdb_entry *sg_mp;
386 struct net_bridge_port_group *pg;
387 struct br_ip sg_ip;
388
389 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
390 return;
391
392 memset(&sg_ip, 0, sizeof(sg_ip));
393 sg_ip = star_mp->addr;
394 for (pg = mlock_dereference(star_mp->ports, br);
395 pg;
396 pg = mlock_dereference(pg->next, br)) {
397 struct net_bridge_group_src *src_ent;
398
399 hlist_for_each_entry(src_ent, &pg->src_list, node) {
400 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
401 continue;
402 sg_ip.src = src_ent->addr.src;
403 sg_mp = br_mdb_ip_get(br, &sg_ip);
404 if (!sg_mp)
405 continue;
406 sg_mp->host_joined = star_mp->host_joined;
407 }
408 }
409}
410
411static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
412{
413 struct net_bridge_port_group __rcu **pp;
414 struct net_bridge_port_group *p;
415
416 /* *,G exclude ports are only added to S,G entries */
417 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
418 return;
419
420 /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
421 * we should ignore perm entries since they're managed by user-space
422 */
423 for (pp = &sgmp->ports;
424 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
425 pp = &p->next)
426 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
427 MDB_PG_FLAGS_PERMANENT)))
428 return;
429
430 /* currently the host can only have joined the *,G which means
431 * we treat it as EXCLUDE {}, so for an S,G it's considered a
432 * STAR_EXCLUDE entry and we can safely leave it
433 */
434 sgmp->host_joined = false;
435
436 for (pp = &sgmp->ports;
437 (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
438 if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
439 br_multicast_del_pg(sgmp, p, pp);
440 else
441 pp = &p->next;
442 }
443}
444
445void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
446 struct net_bridge_port_group *sg)
447{
448 struct net_bridge_port_group_sg_key sg_key;
449 struct net_bridge *br = star_mp->br;
450 struct net_bridge_mcast_port *pmctx;
451 struct net_bridge_port_group *pg;
452 struct net_bridge_mcast *brmctx;
453
454 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
455 return;
456 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
457 return;
458
459 br_multicast_sg_host_state(star_mp, sg);
460 memset(&sg_key, 0, sizeof(sg_key));
461 sg_key.addr = sg->key.addr;
462 /* we need to add all exclude ports to the S,G */
463 for (pg = mlock_dereference(star_mp->ports, br);
464 pg;
465 pg = mlock_dereference(pg->next, br)) {
466 struct net_bridge_port_group *src_pg;
467
468 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
469 continue;
470
471 sg_key.port = pg->key.port;
472 if (br_sg_port_find(br, &sg_key))
473 continue;
474
475 pmctx = br_multicast_pg_to_port_ctx(pg);
476 if (!pmctx)
477 continue;
478 brmctx = br_multicast_port_ctx_get_global(pmctx);
479
480 src_pg = __br_multicast_add_group(brmctx, pmctx,
481 &sg->key.addr,
482 sg->eth_addr,
483 MCAST_INCLUDE, false, false);
484 if (IS_ERR_OR_NULL(src_pg) ||
485 src_pg->rt_protocol != RTPROT_KERNEL)
486 continue;
487 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
488 }
489}
490
491static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
492{
493 struct net_bridge_mdb_entry *star_mp;
494 struct net_bridge_mcast_port *pmctx;
495 struct net_bridge_port_group *sg;
496 struct net_bridge_mcast *brmctx;
497 struct br_ip sg_ip;
498
499 if (src->flags & BR_SGRP_F_INSTALLED)
500 return;
501
502 memset(&sg_ip, 0, sizeof(sg_ip));
503 pmctx = br_multicast_pg_to_port_ctx(src->pg);
504 if (!pmctx)
505 return;
506 brmctx = br_multicast_port_ctx_get_global(pmctx);
507 sg_ip = src->pg->key.addr;
508 sg_ip.src = src->addr.src;
509
510 sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip,
511 src->pg->eth_addr, MCAST_INCLUDE, false,
512 !timer_pending(&src->timer));
513 if (IS_ERR_OR_NULL(sg))
514 return;
515 src->flags |= BR_SGRP_F_INSTALLED;
516 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
517
518 /* if it was added by user-space as perm we can skip next steps */
519 if (sg->rt_protocol != RTPROT_KERNEL &&
520 (sg->flags & MDB_PG_FLAGS_PERMANENT))
521 return;
522
523 /* the kernel is now responsible for removing this S,G */
524 del_timer(&sg->timer);
525 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
526 if (!star_mp)
527 return;
528
529 br_multicast_sg_add_exclude_ports(star_mp, sg);
530}
531
532static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
533 bool fastleave)
534{
535 struct net_bridge_port_group *p, *pg = src->pg;
536 struct net_bridge_port_group __rcu **pp;
537 struct net_bridge_mdb_entry *mp;
538 struct br_ip sg_ip;
539
540 memset(&sg_ip, 0, sizeof(sg_ip));
541 sg_ip = pg->key.addr;
542 sg_ip.src = src->addr.src;
543
544 mp = br_mdb_ip_get(src->br, &sg_ip);
545 if (!mp)
546 return;
547
548 for (pp = &mp->ports;
549 (p = mlock_dereference(*pp, src->br)) != NULL;
550 pp = &p->next) {
551 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
552 continue;
553
554 if (p->rt_protocol != RTPROT_KERNEL &&
555 (p->flags & MDB_PG_FLAGS_PERMANENT) &&
556 !(src->flags & BR_SGRP_F_USER_ADDED))
557 break;
558
559 if (fastleave)
560 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
561 br_multicast_del_pg(mp, p, pp);
562 break;
563 }
564 src->flags &= ~BR_SGRP_F_INSTALLED;
565}
566
567/* install S,G and based on src's timer enable or disable forwarding */
568static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
569{
570 struct net_bridge_port_group_sg_key sg_key;
571 struct net_bridge_port_group *sg;
572 u8 old_flags;
573
574 br_multicast_fwd_src_add(src);
575
576 memset(&sg_key, 0, sizeof(sg_key));
577 sg_key.addr = src->pg->key.addr;
578 sg_key.addr.src = src->addr.src;
579 sg_key.port = src->pg->key.port;
580
581 sg = br_sg_port_find(src->br, &sg_key);
582 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
583 return;
584
585 old_flags = sg->flags;
586 if (timer_pending(&src->timer))
587 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
588 else
589 sg->flags |= MDB_PG_FLAGS_BLOCKED;
590
591 if (old_flags != sg->flags) {
592 struct net_bridge_mdb_entry *sg_mp;
593
594 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
595 if (!sg_mp)
596 return;
597 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
598 }
599}
600
601static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
602{
603 struct net_bridge_mdb_entry *mp;
604
605 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
606 WARN_ON(!hlist_unhashed(&mp->mdb_node));
607 WARN_ON(mp->ports);
608
609 timer_shutdown_sync(&mp->timer);
610 kfree_rcu(mp, rcu);
611}
612
613static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
614{
615 struct net_bridge *br = mp->br;
616
617 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
618 br_mdb_rht_params);
619 hlist_del_init_rcu(&mp->mdb_node);
620 hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
621 queue_work(system_long_wq, &br->mcast_gc_work);
622}
623
624static void br_multicast_group_expired(struct timer_list *t)
625{
626 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
627 struct net_bridge *br = mp->br;
628
629 spin_lock(&br->multicast_lock);
630 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
631 timer_pending(&mp->timer))
632 goto out;
633
634 br_multicast_host_leave(mp, true);
635
636 if (mp->ports)
637 goto out;
638 br_multicast_del_mdb_entry(mp);
639out:
640 spin_unlock(&br->multicast_lock);
641}
642
643static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
644{
645 struct net_bridge_group_src *src;
646
647 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
648 WARN_ON(!hlist_unhashed(&src->node));
649
650 timer_shutdown_sync(&src->timer);
651 kfree_rcu(src, rcu);
652}
653
654void __br_multicast_del_group_src(struct net_bridge_group_src *src)
655{
656 struct net_bridge *br = src->pg->key.port->br;
657
658 hlist_del_init_rcu(&src->node);
659 src->pg->src_ents--;
660 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
661 queue_work(system_long_wq, &br->mcast_gc_work);
662}
663
664void br_multicast_del_group_src(struct net_bridge_group_src *src,
665 bool fastleave)
666{
667 br_multicast_fwd_src_remove(src, fastleave);
668 __br_multicast_del_group_src(src);
669}
670
671static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
672{
673 struct net_bridge_port_group *pg;
674
675 pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
676 WARN_ON(!hlist_unhashed(&pg->mglist));
677 WARN_ON(!hlist_empty(&pg->src_list));
678
679 timer_shutdown_sync(&pg->rexmit_timer);
680 timer_shutdown_sync(&pg->timer);
681 kfree_rcu(pg, rcu);
682}
683
684void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
685 struct net_bridge_port_group *pg,
686 struct net_bridge_port_group __rcu **pp)
687{
688 struct net_bridge *br = pg->key.port->br;
689 struct net_bridge_group_src *ent;
690 struct hlist_node *tmp;
691
692 rcu_assign_pointer(*pp, pg->next);
693 hlist_del_init(&pg->mglist);
694 br_multicast_eht_clean_sets(pg);
695 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
696 br_multicast_del_group_src(ent, false);
697 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
698 if (!br_multicast_is_star_g(&mp->addr)) {
699 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
700 br_sg_port_rht_params);
701 br_multicast_sg_del_exclude_ports(mp);
702 } else {
703 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
704 }
705 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
706 queue_work(system_long_wq, &br->mcast_gc_work);
707
708 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
709 mod_timer(&mp->timer, jiffies);
710}
711
712static void br_multicast_find_del_pg(struct net_bridge *br,
713 struct net_bridge_port_group *pg)
714{
715 struct net_bridge_port_group __rcu **pp;
716 struct net_bridge_mdb_entry *mp;
717 struct net_bridge_port_group *p;
718
719 mp = br_mdb_ip_get(br, &pg->key.addr);
720 if (WARN_ON(!mp))
721 return;
722
723 for (pp = &mp->ports;
724 (p = mlock_dereference(*pp, br)) != NULL;
725 pp = &p->next) {
726 if (p != pg)
727 continue;
728
729 br_multicast_del_pg(mp, pg, pp);
730 return;
731 }
732
733 WARN_ON(1);
734}
735
736static void br_multicast_port_group_expired(struct timer_list *t)
737{
738 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
739 struct net_bridge_group_src *src_ent;
740 struct net_bridge *br = pg->key.port->br;
741 struct hlist_node *tmp;
742 bool changed;
743
744 spin_lock(&br->multicast_lock);
745 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
746 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
747 goto out;
748
749 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
750 pg->filter_mode = MCAST_INCLUDE;
751 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
752 if (!timer_pending(&src_ent->timer)) {
753 br_multicast_del_group_src(src_ent, false);
754 changed = true;
755 }
756 }
757
758 if (hlist_empty(&pg->src_list)) {
759 br_multicast_find_del_pg(br, pg);
760 } else if (changed) {
761 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
762
763 if (changed && br_multicast_is_star_g(&pg->key.addr))
764 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
765
766 if (WARN_ON(!mp))
767 goto out;
768 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
769 }
770out:
771 spin_unlock(&br->multicast_lock);
772}
773
774static void br_multicast_gc(struct hlist_head *head)
775{
776 struct net_bridge_mcast_gc *gcent;
777 struct hlist_node *tmp;
778
779 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
780 hlist_del_init(&gcent->gc_node);
781 gcent->destroy(gcent);
782 }
783}
784
785static void __br_multicast_query_handle_vlan(struct net_bridge_mcast *brmctx,
786 struct net_bridge_mcast_port *pmctx,
787 struct sk_buff *skb)
788{
789 struct net_bridge_vlan *vlan = NULL;
790
791 if (pmctx && br_multicast_port_ctx_is_vlan(pmctx))
792 vlan = pmctx->vlan;
793 else if (br_multicast_ctx_is_vlan(brmctx))
794 vlan = brmctx->vlan;
795
796 if (vlan && !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) {
797 u16 vlan_proto;
798
799 if (br_vlan_get_proto(brmctx->br->dev, &vlan_proto) != 0)
800 return;
801 __vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan->vid);
802 }
803}
804
805static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx,
806 struct net_bridge_mcast_port *pmctx,
807 struct net_bridge_port_group *pg,
808 __be32 ip_dst, __be32 group,
809 bool with_srcs, bool over_lmqt,
810 u8 sflag, u8 *igmp_type,
811 bool *need_rexmit)
812{
813 struct net_bridge_port *p = pg ? pg->key.port : NULL;
814 struct net_bridge_group_src *ent;
815 size_t pkt_size, igmp_hdr_size;
816 unsigned long now = jiffies;
817 struct igmpv3_query *ihv3;
818 void *csum_start = NULL;
819 __sum16 *csum = NULL;
820 struct sk_buff *skb;
821 struct igmphdr *ih;
822 struct ethhdr *eth;
823 unsigned long lmqt;
824 struct iphdr *iph;
825 u16 lmqt_srcs = 0;
826
827 igmp_hdr_size = sizeof(*ih);
828 if (brmctx->multicast_igmp_version == 3) {
829 igmp_hdr_size = sizeof(*ihv3);
830 if (pg && with_srcs) {
831 lmqt = now + (brmctx->multicast_last_member_interval *
832 brmctx->multicast_last_member_count);
833 hlist_for_each_entry(ent, &pg->src_list, node) {
834 if (over_lmqt == time_after(ent->timer.expires,
835 lmqt) &&
836 ent->src_query_rexmit_cnt > 0)
837 lmqt_srcs++;
838 }
839
840 if (!lmqt_srcs)
841 return NULL;
842 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
843 }
844 }
845
846 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
847 if ((p && pkt_size > p->dev->mtu) ||
848 pkt_size > brmctx->br->dev->mtu)
849 return NULL;
850
851 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
852 if (!skb)
853 goto out;
854
855 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
856 skb->protocol = htons(ETH_P_IP);
857
858 skb_reset_mac_header(skb);
859 eth = eth_hdr(skb);
860
861 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
862 ip_eth_mc_map(ip_dst, eth->h_dest);
863 eth->h_proto = htons(ETH_P_IP);
864 skb_put(skb, sizeof(*eth));
865
866 skb_set_network_header(skb, skb->len);
867 iph = ip_hdr(skb);
868 iph->tot_len = htons(pkt_size - sizeof(*eth));
869
870 iph->version = 4;
871 iph->ihl = 6;
872 iph->tos = 0xc0;
873 iph->id = 0;
874 iph->frag_off = htons(IP_DF);
875 iph->ttl = 1;
876 iph->protocol = IPPROTO_IGMP;
877 iph->saddr = br_opt_get(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
878 inet_select_addr(brmctx->br->dev, 0, RT_SCOPE_LINK) : 0;
879 iph->daddr = ip_dst;
880 ((u8 *)&iph[1])[0] = IPOPT_RA;
881 ((u8 *)&iph[1])[1] = 4;
882 ((u8 *)&iph[1])[2] = 0;
883 ((u8 *)&iph[1])[3] = 0;
884 ip_send_check(iph);
885 skb_put(skb, 24);
886
887 skb_set_transport_header(skb, skb->len);
888 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
889
890 switch (brmctx->multicast_igmp_version) {
891 case 2:
892 ih = igmp_hdr(skb);
893 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
894 ih->code = (group ? brmctx->multicast_last_member_interval :
895 brmctx->multicast_query_response_interval) /
896 (HZ / IGMP_TIMER_SCALE);
897 ih->group = group;
898 ih->csum = 0;
899 csum = &ih->csum;
900 csum_start = (void *)ih;
901 break;
902 case 3:
903 ihv3 = igmpv3_query_hdr(skb);
904 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
905 ihv3->code = (group ? brmctx->multicast_last_member_interval :
906 brmctx->multicast_query_response_interval) /
907 (HZ / IGMP_TIMER_SCALE);
908 ihv3->group = group;
909 ihv3->qqic = brmctx->multicast_query_interval / HZ;
910 ihv3->nsrcs = htons(lmqt_srcs);
911 ihv3->resv = 0;
912 ihv3->suppress = sflag;
913 ihv3->qrv = 2;
914 ihv3->csum = 0;
915 csum = &ihv3->csum;
916 csum_start = (void *)ihv3;
917 if (!pg || !with_srcs)
918 break;
919
920 lmqt_srcs = 0;
921 hlist_for_each_entry(ent, &pg->src_list, node) {
922 if (over_lmqt == time_after(ent->timer.expires,
923 lmqt) &&
924 ent->src_query_rexmit_cnt > 0) {
925 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
926 ent->src_query_rexmit_cnt--;
927 if (need_rexmit && ent->src_query_rexmit_cnt)
928 *need_rexmit = true;
929 }
930 }
931 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
932 kfree_skb(skb);
933 return NULL;
934 }
935 break;
936 }
937
938 if (WARN_ON(!csum || !csum_start)) {
939 kfree_skb(skb);
940 return NULL;
941 }
942
943 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
944 skb_put(skb, igmp_hdr_size);
945 __skb_pull(skb, sizeof(*eth));
946
947out:
948 return skb;
949}
950
951#if IS_ENABLED(CONFIG_IPV6)
952static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx,
953 struct net_bridge_mcast_port *pmctx,
954 struct net_bridge_port_group *pg,
955 const struct in6_addr *ip6_dst,
956 const struct in6_addr *group,
957 bool with_srcs, bool over_llqt,
958 u8 sflag, u8 *igmp_type,
959 bool *need_rexmit)
960{
961 struct net_bridge_port *p = pg ? pg->key.port : NULL;
962 struct net_bridge_group_src *ent;
963 size_t pkt_size, mld_hdr_size;
964 unsigned long now = jiffies;
965 struct mld2_query *mld2q;
966 void *csum_start = NULL;
967 unsigned long interval;
968 __sum16 *csum = NULL;
969 struct ipv6hdr *ip6h;
970 struct mld_msg *mldq;
971 struct sk_buff *skb;
972 unsigned long llqt;
973 struct ethhdr *eth;
974 u16 llqt_srcs = 0;
975 u8 *hopopt;
976
977 mld_hdr_size = sizeof(*mldq);
978 if (brmctx->multicast_mld_version == 2) {
979 mld_hdr_size = sizeof(*mld2q);
980 if (pg && with_srcs) {
981 llqt = now + (brmctx->multicast_last_member_interval *
982 brmctx->multicast_last_member_count);
983 hlist_for_each_entry(ent, &pg->src_list, node) {
984 if (over_llqt == time_after(ent->timer.expires,
985 llqt) &&
986 ent->src_query_rexmit_cnt > 0)
987 llqt_srcs++;
988 }
989
990 if (!llqt_srcs)
991 return NULL;
992 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
993 }
994 }
995
996 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
997 if ((p && pkt_size > p->dev->mtu) ||
998 pkt_size > brmctx->br->dev->mtu)
999 return NULL;
1000
1001 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
1002 if (!skb)
1003 goto out;
1004
1005 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
1006 skb->protocol = htons(ETH_P_IPV6);
1007
1008 /* Ethernet header */
1009 skb_reset_mac_header(skb);
1010 eth = eth_hdr(skb);
1011
1012 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
1013 eth->h_proto = htons(ETH_P_IPV6);
1014 skb_put(skb, sizeof(*eth));
1015
1016 /* IPv6 header + HbH option */
1017 skb_set_network_header(skb, skb->len);
1018 ip6h = ipv6_hdr(skb);
1019
1020 *(__force __be32 *)ip6h = htonl(0x60000000);
1021 ip6h->payload_len = htons(8 + mld_hdr_size);
1022 ip6h->nexthdr = IPPROTO_HOPOPTS;
1023 ip6h->hop_limit = 1;
1024 ip6h->daddr = *ip6_dst;
1025 if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev,
1026 &ip6h->daddr, 0, &ip6h->saddr)) {
1027 kfree_skb(skb);
1028 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false);
1029 return NULL;
1030 }
1031
1032 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true);
1033 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
1034
1035 hopopt = (u8 *)(ip6h + 1);
1036 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
1037 hopopt[1] = 0; /* length of HbH */
1038 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
1039 hopopt[3] = 2; /* Length of RA Option */
1040 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
1041 hopopt[5] = 0;
1042 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
1043 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
1044
1045 skb_put(skb, sizeof(*ip6h) + 8);
1046
1047 /* ICMPv6 */
1048 skb_set_transport_header(skb, skb->len);
1049 interval = ipv6_addr_any(group) ?
1050 brmctx->multicast_query_response_interval :
1051 brmctx->multicast_last_member_interval;
1052 *igmp_type = ICMPV6_MGM_QUERY;
1053 switch (brmctx->multicast_mld_version) {
1054 case 1:
1055 mldq = (struct mld_msg *)icmp6_hdr(skb);
1056 mldq->mld_type = ICMPV6_MGM_QUERY;
1057 mldq->mld_code = 0;
1058 mldq->mld_cksum = 0;
1059 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
1060 mldq->mld_reserved = 0;
1061 mldq->mld_mca = *group;
1062 csum = &mldq->mld_cksum;
1063 csum_start = (void *)mldq;
1064 break;
1065 case 2:
1066 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1067 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
1068 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
1069 mld2q->mld2q_code = 0;
1070 mld2q->mld2q_cksum = 0;
1071 mld2q->mld2q_resv1 = 0;
1072 mld2q->mld2q_resv2 = 0;
1073 mld2q->mld2q_suppress = sflag;
1074 mld2q->mld2q_qrv = 2;
1075 mld2q->mld2q_nsrcs = htons(llqt_srcs);
1076 mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ;
1077 mld2q->mld2q_mca = *group;
1078 csum = &mld2q->mld2q_cksum;
1079 csum_start = (void *)mld2q;
1080 if (!pg || !with_srcs)
1081 break;
1082
1083 llqt_srcs = 0;
1084 hlist_for_each_entry(ent, &pg->src_list, node) {
1085 if (over_llqt == time_after(ent->timer.expires,
1086 llqt) &&
1087 ent->src_query_rexmit_cnt > 0) {
1088 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
1089 ent->src_query_rexmit_cnt--;
1090 if (need_rexmit && ent->src_query_rexmit_cnt)
1091 *need_rexmit = true;
1092 }
1093 }
1094 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
1095 kfree_skb(skb);
1096 return NULL;
1097 }
1098 break;
1099 }
1100
1101 if (WARN_ON(!csum || !csum_start)) {
1102 kfree_skb(skb);
1103 return NULL;
1104 }
1105
1106 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
1107 IPPROTO_ICMPV6,
1108 csum_partial(csum_start, mld_hdr_size, 0));
1109 skb_put(skb, mld_hdr_size);
1110 __skb_pull(skb, sizeof(*eth));
1111
1112out:
1113 return skb;
1114}
1115#endif
1116
1117static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx,
1118 struct net_bridge_mcast_port *pmctx,
1119 struct net_bridge_port_group *pg,
1120 struct br_ip *ip_dst,
1121 struct br_ip *group,
1122 bool with_srcs, bool over_lmqt,
1123 u8 sflag, u8 *igmp_type,
1124 bool *need_rexmit)
1125{
1126 __be32 ip4_dst;
1127
1128 switch (group->proto) {
1129 case htons(ETH_P_IP):
1130 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
1131 return br_ip4_multicast_alloc_query(brmctx, pmctx, pg,
1132 ip4_dst, group->dst.ip4,
1133 with_srcs, over_lmqt,
1134 sflag, igmp_type,
1135 need_rexmit);
1136#if IS_ENABLED(CONFIG_IPV6)
1137 case htons(ETH_P_IPV6): {
1138 struct in6_addr ip6_dst;
1139
1140 if (ip_dst)
1141 ip6_dst = ip_dst->dst.ip6;
1142 else
1143 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1144 htonl(1));
1145
1146 return br_ip6_multicast_alloc_query(brmctx, pmctx, pg,
1147 &ip6_dst, &group->dst.ip6,
1148 with_srcs, over_lmqt,
1149 sflag, igmp_type,
1150 need_rexmit);
1151 }
1152#endif
1153 }
1154 return NULL;
1155}
1156
1157struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
1158 struct br_ip *group)
1159{
1160 struct net_bridge_mdb_entry *mp;
1161 int err;
1162
1163 mp = br_mdb_ip_get(br, group);
1164 if (mp)
1165 return mp;
1166
1167 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
1168 br_mc_disabled_update(br->dev, false, NULL);
1169 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1170 return ERR_PTR(-E2BIG);
1171 }
1172
1173 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1174 if (unlikely(!mp))
1175 return ERR_PTR(-ENOMEM);
1176
1177 mp->br = br;
1178 mp->addr = *group;
1179 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
1180 timer_setup(&mp->timer, br_multicast_group_expired, 0);
1181 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1182 br_mdb_rht_params);
1183 if (err) {
1184 kfree(mp);
1185 mp = ERR_PTR(err);
1186 } else {
1187 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1188 }
1189
1190 return mp;
1191}
1192
1193static void br_multicast_group_src_expired(struct timer_list *t)
1194{
1195 struct net_bridge_group_src *src = from_timer(src, t, timer);
1196 struct net_bridge_port_group *pg;
1197 struct net_bridge *br = src->br;
1198
1199 spin_lock(&br->multicast_lock);
1200 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1201 timer_pending(&src->timer))
1202 goto out;
1203
1204 pg = src->pg;
1205 if (pg->filter_mode == MCAST_INCLUDE) {
1206 br_multicast_del_group_src(src, false);
1207 if (!hlist_empty(&pg->src_list))
1208 goto out;
1209 br_multicast_find_del_pg(br, pg);
1210 } else {
1211 br_multicast_fwd_src_handle(src);
1212 }
1213
1214out:
1215 spin_unlock(&br->multicast_lock);
1216}
1217
1218struct net_bridge_group_src *
1219br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1220{
1221 struct net_bridge_group_src *ent;
1222
1223 switch (ip->proto) {
1224 case htons(ETH_P_IP):
1225 hlist_for_each_entry(ent, &pg->src_list, node)
1226 if (ip->src.ip4 == ent->addr.src.ip4)
1227 return ent;
1228 break;
1229#if IS_ENABLED(CONFIG_IPV6)
1230 case htons(ETH_P_IPV6):
1231 hlist_for_each_entry(ent, &pg->src_list, node)
1232 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
1233 return ent;
1234 break;
1235#endif
1236 }
1237
1238 return NULL;
1239}
1240
1241struct net_bridge_group_src *
1242br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1243{
1244 struct net_bridge_group_src *grp_src;
1245
1246 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1247 return NULL;
1248
1249 switch (src_ip->proto) {
1250 case htons(ETH_P_IP):
1251 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1252 ipv4_is_multicast(src_ip->src.ip4))
1253 return NULL;
1254 break;
1255#if IS_ENABLED(CONFIG_IPV6)
1256 case htons(ETH_P_IPV6):
1257 if (ipv6_addr_any(&src_ip->src.ip6) ||
1258 ipv6_addr_is_multicast(&src_ip->src.ip6))
1259 return NULL;
1260 break;
1261#endif
1262 }
1263
1264 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1265 if (unlikely(!grp_src))
1266 return NULL;
1267
1268 grp_src->pg = pg;
1269 grp_src->br = pg->key.port->br;
1270 grp_src->addr = *src_ip;
1271 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
1272 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1273
1274 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1275 pg->src_ents++;
1276
1277 return grp_src;
1278}
1279
1280struct net_bridge_port_group *br_multicast_new_port_group(
1281 struct net_bridge_port *port,
1282 const struct br_ip *group,
1283 struct net_bridge_port_group __rcu *next,
1284 unsigned char flags,
1285 const unsigned char *src,
1286 u8 filter_mode,
1287 u8 rt_protocol)
1288{
1289 struct net_bridge_port_group *p;
1290
1291 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1292 if (unlikely(!p))
1293 return NULL;
1294
1295 p->key.addr = *group;
1296 p->key.port = port;
1297 p->flags = flags;
1298 p->filter_mode = filter_mode;
1299 p->rt_protocol = rt_protocol;
1300 p->eht_host_tree = RB_ROOT;
1301 p->eht_set_tree = RB_ROOT;
1302 p->mcast_gc.destroy = br_multicast_destroy_port_group;
1303 INIT_HLIST_HEAD(&p->src_list);
1304
1305 if (!br_multicast_is_star_g(group) &&
1306 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1307 br_sg_port_rht_params)) {
1308 kfree(p);
1309 return NULL;
1310 }
1311
1312 rcu_assign_pointer(p->next, next);
1313 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
1314 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1315 hlist_add_head(&p->mglist, &port->mglist);
1316
1317 if (src)
1318 memcpy(p->eth_addr, src, ETH_ALEN);
1319 else
1320 eth_broadcast_addr(p->eth_addr);
1321
1322 return p;
1323}
1324
1325void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1326 struct net_bridge_mdb_entry *mp, bool notify)
1327{
1328 if (!mp->host_joined) {
1329 mp->host_joined = true;
1330 if (br_multicast_is_star_g(&mp->addr))
1331 br_multicast_star_g_host_state(mp);
1332 if (notify)
1333 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1334 }
1335
1336 if (br_group_is_l2(&mp->addr))
1337 return;
1338
1339 mod_timer(&mp->timer, jiffies + brmctx->multicast_membership_interval);
1340}
1341
1342void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1343{
1344 if (!mp->host_joined)
1345 return;
1346
1347 mp->host_joined = false;
1348 if (br_multicast_is_star_g(&mp->addr))
1349 br_multicast_star_g_host_state(mp);
1350 if (notify)
1351 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1352}
1353
1354static struct net_bridge_port_group *
1355__br_multicast_add_group(struct net_bridge_mcast *brmctx,
1356 struct net_bridge_mcast_port *pmctx,
1357 struct br_ip *group,
1358 const unsigned char *src,
1359 u8 filter_mode,
1360 bool igmpv2_mldv1,
1361 bool blocked)
1362{
1363 struct net_bridge_port_group __rcu **pp;
1364 struct net_bridge_port_group *p = NULL;
1365 struct net_bridge_mdb_entry *mp;
1366 unsigned long now = jiffies;
1367
1368 if (!br_multicast_ctx_should_use(brmctx, pmctx))
1369 goto out;
1370
1371 mp = br_multicast_new_group(brmctx->br, group);
1372 if (IS_ERR(mp))
1373 return ERR_CAST(mp);
1374
1375 if (!pmctx) {
1376 br_multicast_host_join(brmctx, mp, true);
1377 goto out;
1378 }
1379
1380 for (pp = &mp->ports;
1381 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
1382 pp = &p->next) {
1383 if (br_port_group_equal(p, pmctx->port, src))
1384 goto found;
1385 if ((unsigned long)p->key.port < (unsigned long)pmctx->port)
1386 break;
1387 }
1388
1389 p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src,
1390 filter_mode, RTPROT_KERNEL);
1391 if (unlikely(!p)) {
1392 p = ERR_PTR(-ENOMEM);
1393 goto out;
1394 }
1395 rcu_assign_pointer(*pp, p);
1396 if (blocked)
1397 p->flags |= MDB_PG_FLAGS_BLOCKED;
1398 br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB);
1399
1400found:
1401 if (igmpv2_mldv1)
1402 mod_timer(&p->timer,
1403 now + brmctx->multicast_membership_interval);
1404
1405out:
1406 return p;
1407}
1408
1409static int br_multicast_add_group(struct net_bridge_mcast *brmctx,
1410 struct net_bridge_mcast_port *pmctx,
1411 struct br_ip *group,
1412 const unsigned char *src,
1413 u8 filter_mode,
1414 bool igmpv2_mldv1)
1415{
1416 struct net_bridge_port_group *pg;
1417 int err;
1418
1419 spin_lock(&brmctx->br->multicast_lock);
1420 pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode,
1421 igmpv2_mldv1, false);
1422 /* NULL is considered valid for host joined groups */
1423 err = PTR_ERR_OR_ZERO(pg);
1424 spin_unlock(&brmctx->br->multicast_lock);
1425
1426 return err;
1427}
1428
1429static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx,
1430 struct net_bridge_mcast_port *pmctx,
1431 __be32 group,
1432 __u16 vid,
1433 const unsigned char *src,
1434 bool igmpv2)
1435{
1436 struct br_ip br_group;
1437 u8 filter_mode;
1438
1439 if (ipv4_is_local_multicast(group))
1440 return 0;
1441
1442 memset(&br_group, 0, sizeof(br_group));
1443 br_group.dst.ip4 = group;
1444 br_group.proto = htons(ETH_P_IP);
1445 br_group.vid = vid;
1446 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1447
1448 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1449 filter_mode, igmpv2);
1450}
1451
1452#if IS_ENABLED(CONFIG_IPV6)
1453static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx,
1454 struct net_bridge_mcast_port *pmctx,
1455 const struct in6_addr *group,
1456 __u16 vid,
1457 const unsigned char *src,
1458 bool mldv1)
1459{
1460 struct br_ip br_group;
1461 u8 filter_mode;
1462
1463 if (ipv6_addr_is_ll_all_nodes(group))
1464 return 0;
1465
1466 memset(&br_group, 0, sizeof(br_group));
1467 br_group.dst.ip6 = *group;
1468 br_group.proto = htons(ETH_P_IPV6);
1469 br_group.vid = vid;
1470 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1471
1472 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1473 filter_mode, mldv1);
1474}
1475#endif
1476
1477static bool br_multicast_rport_del(struct hlist_node *rlist)
1478{
1479 if (hlist_unhashed(rlist))
1480 return false;
1481
1482 hlist_del_init_rcu(rlist);
1483 return true;
1484}
1485
1486static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
1487{
1488 return br_multicast_rport_del(&pmctx->ip4_rlist);
1489}
1490
1491static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
1492{
1493#if IS_ENABLED(CONFIG_IPV6)
1494 return br_multicast_rport_del(&pmctx->ip6_rlist);
1495#else
1496 return false;
1497#endif
1498}
1499
1500static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx,
1501 struct timer_list *t,
1502 struct hlist_node *rlist)
1503{
1504 struct net_bridge *br = pmctx->port->br;
1505 bool del;
1506
1507 spin_lock(&br->multicast_lock);
1508 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1509 pmctx->multicast_router == MDB_RTR_TYPE_PERM ||
1510 timer_pending(t))
1511 goto out;
1512
1513 del = br_multicast_rport_del(rlist);
1514 br_multicast_rport_del_notify(pmctx, del);
1515out:
1516 spin_unlock(&br->multicast_lock);
1517}
1518
1519static void br_ip4_multicast_router_expired(struct timer_list *t)
1520{
1521 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1522 ip4_mc_router_timer);
1523
1524 br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist);
1525}
1526
1527#if IS_ENABLED(CONFIG_IPV6)
1528static void br_ip6_multicast_router_expired(struct timer_list *t)
1529{
1530 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1531 ip6_mc_router_timer);
1532
1533 br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist);
1534}
1535#endif
1536
1537static void br_mc_router_state_change(struct net_bridge *p,
1538 bool is_mc_router)
1539{
1540 struct switchdev_attr attr = {
1541 .orig_dev = p->dev,
1542 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1543 .flags = SWITCHDEV_F_DEFER,
1544 .u.mrouter = is_mc_router,
1545 };
1546
1547 switchdev_port_attr_set(p->dev, &attr, NULL);
1548}
1549
1550static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx,
1551 struct timer_list *timer)
1552{
1553 spin_lock(&brmctx->br->multicast_lock);
1554 if (brmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1555 brmctx->multicast_router == MDB_RTR_TYPE_PERM ||
1556 br_ip4_multicast_is_router(brmctx) ||
1557 br_ip6_multicast_is_router(brmctx))
1558 goto out;
1559
1560 br_mc_router_state_change(brmctx->br, false);
1561out:
1562 spin_unlock(&brmctx->br->multicast_lock);
1563}
1564
1565static void br_ip4_multicast_local_router_expired(struct timer_list *t)
1566{
1567 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1568 ip4_mc_router_timer);
1569
1570 br_multicast_local_router_expired(brmctx, t);
1571}
1572
1573#if IS_ENABLED(CONFIG_IPV6)
1574static void br_ip6_multicast_local_router_expired(struct timer_list *t)
1575{
1576 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1577 ip6_mc_router_timer);
1578
1579 br_multicast_local_router_expired(brmctx, t);
1580}
1581#endif
1582
1583static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx,
1584 struct bridge_mcast_own_query *query)
1585{
1586 spin_lock(&brmctx->br->multicast_lock);
1587 if (!netif_running(brmctx->br->dev) ||
1588 br_multicast_ctx_vlan_global_disabled(brmctx) ||
1589 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
1590 goto out;
1591
1592 br_multicast_start_querier(brmctx, query);
1593
1594out:
1595 spin_unlock(&brmctx->br->multicast_lock);
1596}
1597
1598static void br_ip4_multicast_querier_expired(struct timer_list *t)
1599{
1600 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1601 ip4_other_query.timer);
1602
1603 br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query);
1604}
1605
1606#if IS_ENABLED(CONFIG_IPV6)
1607static void br_ip6_multicast_querier_expired(struct timer_list *t)
1608{
1609 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1610 ip6_other_query.timer);
1611
1612 br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query);
1613}
1614#endif
1615
1616static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx,
1617 struct br_ip *ip,
1618 struct sk_buff *skb)
1619{
1620 if (ip->proto == htons(ETH_P_IP))
1621 brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
1622#if IS_ENABLED(CONFIG_IPV6)
1623 else
1624 brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
1625#endif
1626}
1627
1628static void __br_multicast_send_query(struct net_bridge_mcast *brmctx,
1629 struct net_bridge_mcast_port *pmctx,
1630 struct net_bridge_port_group *pg,
1631 struct br_ip *ip_dst,
1632 struct br_ip *group,
1633 bool with_srcs,
1634 u8 sflag,
1635 bool *need_rexmit)
1636{
1637 bool over_lmqt = !!sflag;
1638 struct sk_buff *skb;
1639 u8 igmp_type;
1640
1641 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1642 !br_multicast_ctx_matches_vlan_snooping(brmctx))
1643 return;
1644
1645again_under_lmqt:
1646 skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group,
1647 with_srcs, over_lmqt, sflag, &igmp_type,
1648 need_rexmit);
1649 if (!skb)
1650 return;
1651
1652 if (pmctx) {
1653 skb->dev = pmctx->port->dev;
1654 br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type,
1655 BR_MCAST_DIR_TX);
1656 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
1657 dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev,
1658 br_dev_queue_push_xmit);
1659
1660 if (over_lmqt && with_srcs && sflag) {
1661 over_lmqt = false;
1662 goto again_under_lmqt;
1663 }
1664 } else {
1665 br_multicast_select_own_querier(brmctx, group, skb);
1666 br_multicast_count(brmctx->br, NULL, skb, igmp_type,
1667 BR_MCAST_DIR_RX);
1668 netif_rx(skb);
1669 }
1670}
1671
1672static void br_multicast_read_querier(const struct bridge_mcast_querier *querier,
1673 struct bridge_mcast_querier *dest)
1674{
1675 unsigned int seq;
1676
1677 memset(dest, 0, sizeof(*dest));
1678 do {
1679 seq = read_seqcount_begin(&querier->seq);
1680 dest->port_ifidx = querier->port_ifidx;
1681 memcpy(&dest->addr, &querier->addr, sizeof(struct br_ip));
1682 } while (read_seqcount_retry(&querier->seq, seq));
1683}
1684
1685static void br_multicast_update_querier(struct net_bridge_mcast *brmctx,
1686 struct bridge_mcast_querier *querier,
1687 int ifindex,
1688 struct br_ip *saddr)
1689{
1690 write_seqcount_begin(&querier->seq);
1691 querier->port_ifidx = ifindex;
1692 memcpy(&querier->addr, saddr, sizeof(*saddr));
1693 write_seqcount_end(&querier->seq);
1694}
1695
1696static void br_multicast_send_query(struct net_bridge_mcast *brmctx,
1697 struct net_bridge_mcast_port *pmctx,
1698 struct bridge_mcast_own_query *own_query)
1699{
1700 struct bridge_mcast_other_query *other_query = NULL;
1701 struct bridge_mcast_querier *querier;
1702 struct br_ip br_group;
1703 unsigned long time;
1704
1705 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1706 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
1707 !brmctx->multicast_querier)
1708 return;
1709
1710 memset(&br_group.dst, 0, sizeof(br_group.dst));
1711
1712 if (pmctx ? (own_query == &pmctx->ip4_own_query) :
1713 (own_query == &brmctx->ip4_own_query)) {
1714 querier = &brmctx->ip4_querier;
1715 other_query = &brmctx->ip4_other_query;
1716 br_group.proto = htons(ETH_P_IP);
1717#if IS_ENABLED(CONFIG_IPV6)
1718 } else {
1719 querier = &brmctx->ip6_querier;
1720 other_query = &brmctx->ip6_other_query;
1721 br_group.proto = htons(ETH_P_IPV6);
1722#endif
1723 }
1724
1725 if (!other_query || timer_pending(&other_query->timer))
1726 return;
1727
1728 /* we're about to select ourselves as querier */
1729 if (!pmctx && querier->port_ifidx) {
1730 struct br_ip zeroip = {};
1731
1732 br_multicast_update_querier(brmctx, querier, 0, &zeroip);
1733 }
1734
1735 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false,
1736 0, NULL);
1737
1738 time = jiffies;
1739 time += own_query->startup_sent < brmctx->multicast_startup_query_count ?
1740 brmctx->multicast_startup_query_interval :
1741 brmctx->multicast_query_interval;
1742 mod_timer(&own_query->timer, time);
1743}
1744
1745static void
1746br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx,
1747 struct bridge_mcast_own_query *query)
1748{
1749 struct net_bridge *br = pmctx->port->br;
1750 struct net_bridge_mcast *brmctx;
1751
1752 spin_lock(&br->multicast_lock);
1753 if (br_multicast_port_ctx_state_stopped(pmctx))
1754 goto out;
1755
1756 brmctx = br_multicast_port_ctx_get_global(pmctx);
1757 if (query->startup_sent < brmctx->multicast_startup_query_count)
1758 query->startup_sent++;
1759
1760 br_multicast_send_query(brmctx, pmctx, query);
1761
1762out:
1763 spin_unlock(&br->multicast_lock);
1764}
1765
1766static void br_ip4_multicast_port_query_expired(struct timer_list *t)
1767{
1768 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1769 ip4_own_query.timer);
1770
1771 br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query);
1772}
1773
1774#if IS_ENABLED(CONFIG_IPV6)
1775static void br_ip6_multicast_port_query_expired(struct timer_list *t)
1776{
1777 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1778 ip6_own_query.timer);
1779
1780 br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query);
1781}
1782#endif
1783
1784static void br_multicast_port_group_rexmit(struct timer_list *t)
1785{
1786 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1787 struct bridge_mcast_other_query *other_query = NULL;
1788 struct net_bridge *br = pg->key.port->br;
1789 struct net_bridge_mcast_port *pmctx;
1790 struct net_bridge_mcast *brmctx;
1791 bool need_rexmit = false;
1792
1793 spin_lock(&br->multicast_lock);
1794 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
1795 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1796 goto out;
1797
1798 pmctx = br_multicast_pg_to_port_ctx(pg);
1799 if (!pmctx)
1800 goto out;
1801 brmctx = br_multicast_port_ctx_get_global(pmctx);
1802 if (!brmctx->multicast_querier)
1803 goto out;
1804
1805 if (pg->key.addr.proto == htons(ETH_P_IP))
1806 other_query = &brmctx->ip4_other_query;
1807#if IS_ENABLED(CONFIG_IPV6)
1808 else
1809 other_query = &brmctx->ip6_other_query;
1810#endif
1811
1812 if (!other_query || timer_pending(&other_query->timer))
1813 goto out;
1814
1815 if (pg->grp_query_rexmit_cnt) {
1816 pg->grp_query_rexmit_cnt--;
1817 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
1818 &pg->key.addr, false, 1, NULL);
1819 }
1820 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
1821 &pg->key.addr, true, 0, &need_rexmit);
1822
1823 if (pg->grp_query_rexmit_cnt || need_rexmit)
1824 mod_timer(&pg->rexmit_timer, jiffies +
1825 brmctx->multicast_last_member_interval);
1826out:
1827 spin_unlock(&br->multicast_lock);
1828}
1829
1830static int br_mc_disabled_update(struct net_device *dev, bool value,
1831 struct netlink_ext_ack *extack)
1832{
1833 struct switchdev_attr attr = {
1834 .orig_dev = dev,
1835 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1836 .flags = SWITCHDEV_F_DEFER,
1837 .u.mc_disabled = !value,
1838 };
1839
1840 return switchdev_port_attr_set(dev, &attr, extack);
1841}
1842
1843void br_multicast_port_ctx_init(struct net_bridge_port *port,
1844 struct net_bridge_vlan *vlan,
1845 struct net_bridge_mcast_port *pmctx)
1846{
1847 pmctx->port = port;
1848 pmctx->vlan = vlan;
1849 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1850 timer_setup(&pmctx->ip4_mc_router_timer,
1851 br_ip4_multicast_router_expired, 0);
1852 timer_setup(&pmctx->ip4_own_query.timer,
1853 br_ip4_multicast_port_query_expired, 0);
1854#if IS_ENABLED(CONFIG_IPV6)
1855 timer_setup(&pmctx->ip6_mc_router_timer,
1856 br_ip6_multicast_router_expired, 0);
1857 timer_setup(&pmctx->ip6_own_query.timer,
1858 br_ip6_multicast_port_query_expired, 0);
1859#endif
1860}
1861
1862void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1863{
1864#if IS_ENABLED(CONFIG_IPV6)
1865 del_timer_sync(&pmctx->ip6_mc_router_timer);
1866#endif
1867 del_timer_sync(&pmctx->ip4_mc_router_timer);
1868}
1869
1870int br_multicast_add_port(struct net_bridge_port *port)
1871{
1872 int err;
1873
1874 port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
1875 br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx);
1876
1877 err = br_mc_disabled_update(port->dev,
1878 br_opt_get(port->br,
1879 BROPT_MULTICAST_ENABLED),
1880 NULL);
1881 if (err && err != -EOPNOTSUPP)
1882 return err;
1883
1884 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
1885 if (!port->mcast_stats)
1886 return -ENOMEM;
1887
1888 return 0;
1889}
1890
1891void br_multicast_del_port(struct net_bridge_port *port)
1892{
1893 struct net_bridge *br = port->br;
1894 struct net_bridge_port_group *pg;
1895 HLIST_HEAD(deleted_head);
1896 struct hlist_node *n;
1897
1898 /* Take care of the remaining groups, only perm ones should be left */
1899 spin_lock_bh(&br->multicast_lock);
1900 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
1901 br_multicast_find_del_pg(br, pg);
1902 hlist_move_list(&br->mcast_gc_list, &deleted_head);
1903 spin_unlock_bh(&br->multicast_lock);
1904 br_multicast_gc(&deleted_head);
1905 br_multicast_port_ctx_deinit(&port->multicast_ctx);
1906 free_percpu(port->mcast_stats);
1907}
1908
1909static void br_multicast_enable(struct bridge_mcast_own_query *query)
1910{
1911 query->startup_sent = 0;
1912
1913 if (try_to_del_timer_sync(&query->timer) >= 0 ||
1914 del_timer(&query->timer))
1915 mod_timer(&query->timer, jiffies);
1916}
1917
1918static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx)
1919{
1920 struct net_bridge *br = pmctx->port->br;
1921 struct net_bridge_mcast *brmctx;
1922
1923 brmctx = br_multicast_port_ctx_get_global(pmctx);
1924 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1925 !netif_running(br->dev))
1926 return;
1927
1928 br_multicast_enable(&pmctx->ip4_own_query);
1929#if IS_ENABLED(CONFIG_IPV6)
1930 br_multicast_enable(&pmctx->ip6_own_query);
1931#endif
1932 if (pmctx->multicast_router == MDB_RTR_TYPE_PERM) {
1933 br_ip4_multicast_add_router(brmctx, pmctx);
1934 br_ip6_multicast_add_router(brmctx, pmctx);
1935 }
1936}
1937
1938void br_multicast_enable_port(struct net_bridge_port *port)
1939{
1940 struct net_bridge *br = port->br;
1941
1942 spin_lock_bh(&br->multicast_lock);
1943 __br_multicast_enable_port_ctx(&port->multicast_ctx);
1944 spin_unlock_bh(&br->multicast_lock);
1945}
1946
1947static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx)
1948{
1949 struct net_bridge_port_group *pg;
1950 struct hlist_node *n;
1951 bool del = false;
1952
1953 hlist_for_each_entry_safe(pg, n, &pmctx->port->mglist, mglist)
1954 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT) &&
1955 (!br_multicast_port_ctx_is_vlan(pmctx) ||
1956 pg->key.addr.vid == pmctx->vlan->vid))
1957 br_multicast_find_del_pg(pmctx->port->br, pg);
1958
1959 del |= br_ip4_multicast_rport_del(pmctx);
1960 del_timer(&pmctx->ip4_mc_router_timer);
1961 del_timer(&pmctx->ip4_own_query.timer);
1962 del |= br_ip6_multicast_rport_del(pmctx);
1963#if IS_ENABLED(CONFIG_IPV6)
1964 del_timer(&pmctx->ip6_mc_router_timer);
1965 del_timer(&pmctx->ip6_own_query.timer);
1966#endif
1967 br_multicast_rport_del_notify(pmctx, del);
1968}
1969
1970void br_multicast_disable_port(struct net_bridge_port *port)
1971{
1972 spin_lock_bh(&port->br->multicast_lock);
1973 __br_multicast_disable_port_ctx(&port->multicast_ctx);
1974 spin_unlock_bh(&port->br->multicast_lock);
1975}
1976
1977static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
1978{
1979 struct net_bridge_group_src *ent;
1980 struct hlist_node *tmp;
1981 int deleted = 0;
1982
1983 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
1984 if (ent->flags & BR_SGRP_F_DELETE) {
1985 br_multicast_del_group_src(ent, false);
1986 deleted++;
1987 }
1988
1989 return deleted;
1990}
1991
1992static void __grp_src_mod_timer(struct net_bridge_group_src *src,
1993 unsigned long expires)
1994{
1995 mod_timer(&src->timer, expires);
1996 br_multicast_fwd_src_handle(src);
1997}
1998
1999static void __grp_src_query_marked_and_rexmit(struct net_bridge_mcast *brmctx,
2000 struct net_bridge_mcast_port *pmctx,
2001 struct net_bridge_port_group *pg)
2002{
2003 struct bridge_mcast_other_query *other_query = NULL;
2004 u32 lmqc = brmctx->multicast_last_member_count;
2005 unsigned long lmqt, lmi, now = jiffies;
2006 struct net_bridge_group_src *ent;
2007
2008 if (!netif_running(brmctx->br->dev) ||
2009 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
2010 return;
2011
2012 if (pg->key.addr.proto == htons(ETH_P_IP))
2013 other_query = &brmctx->ip4_other_query;
2014#if IS_ENABLED(CONFIG_IPV6)
2015 else
2016 other_query = &brmctx->ip6_other_query;
2017#endif
2018
2019 lmqt = now + br_multicast_lmqt(brmctx);
2020 hlist_for_each_entry(ent, &pg->src_list, node) {
2021 if (ent->flags & BR_SGRP_F_SEND) {
2022 ent->flags &= ~BR_SGRP_F_SEND;
2023 if (ent->timer.expires > lmqt) {
2024 if (brmctx->multicast_querier &&
2025 other_query &&
2026 !timer_pending(&other_query->timer))
2027 ent->src_query_rexmit_cnt = lmqc;
2028 __grp_src_mod_timer(ent, lmqt);
2029 }
2030 }
2031 }
2032
2033 if (!brmctx->multicast_querier ||
2034 !other_query || timer_pending(&other_query->timer))
2035 return;
2036
2037 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
2038 &pg->key.addr, true, 1, NULL);
2039
2040 lmi = now + brmctx->multicast_last_member_interval;
2041 if (!timer_pending(&pg->rexmit_timer) ||
2042 time_after(pg->rexmit_timer.expires, lmi))
2043 mod_timer(&pg->rexmit_timer, lmi);
2044}
2045
2046static void __grp_send_query_and_rexmit(struct net_bridge_mcast *brmctx,
2047 struct net_bridge_mcast_port *pmctx,
2048 struct net_bridge_port_group *pg)
2049{
2050 struct bridge_mcast_other_query *other_query = NULL;
2051 unsigned long now = jiffies, lmi;
2052
2053 if (!netif_running(brmctx->br->dev) ||
2054 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
2055 return;
2056
2057 if (pg->key.addr.proto == htons(ETH_P_IP))
2058 other_query = &brmctx->ip4_other_query;
2059#if IS_ENABLED(CONFIG_IPV6)
2060 else
2061 other_query = &brmctx->ip6_other_query;
2062#endif
2063
2064 if (brmctx->multicast_querier &&
2065 other_query && !timer_pending(&other_query->timer)) {
2066 lmi = now + brmctx->multicast_last_member_interval;
2067 pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1;
2068 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
2069 &pg->key.addr, false, 0, NULL);
2070 if (!timer_pending(&pg->rexmit_timer) ||
2071 time_after(pg->rexmit_timer.expires, lmi))
2072 mod_timer(&pg->rexmit_timer, lmi);
2073 }
2074
2075 if (pg->filter_mode == MCAST_EXCLUDE &&
2076 (!timer_pending(&pg->timer) ||
2077 time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx))))
2078 mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx));
2079}
2080
2081/* State Msg type New state Actions
2082 * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
2083 * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
2084 * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
2085 */
2086static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx,
2087 struct net_bridge_port_group *pg, void *h_addr,
2088 void *srcs, u32 nsrcs, size_t addr_size,
2089 int grec_type)
2090{
2091 struct net_bridge_group_src *ent;
2092 unsigned long now = jiffies;
2093 bool changed = false;
2094 struct br_ip src_ip;
2095 u32 src_idx;
2096
2097 memset(&src_ip, 0, sizeof(src_ip));
2098 src_ip.proto = pg->key.addr.proto;
2099 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2100 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2101 ent = br_multicast_find_group_src(pg, &src_ip);
2102 if (!ent) {
2103 ent = br_multicast_new_group_src(pg, &src_ip);
2104 if (ent)
2105 changed = true;
2106 }
2107
2108 if (ent)
2109 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2110 }
2111
2112 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2113 grec_type))
2114 changed = true;
2115
2116 return changed;
2117}
2118
2119/* State Msg type New state Actions
2120 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2121 * Delete (A-B)
2122 * Group Timer=GMI
2123 */
2124static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx,
2125 struct net_bridge_port_group *pg, void *h_addr,
2126 void *srcs, u32 nsrcs, size_t addr_size,
2127 int grec_type)
2128{
2129 struct net_bridge_group_src *ent;
2130 struct br_ip src_ip;
2131 u32 src_idx;
2132
2133 hlist_for_each_entry(ent, &pg->src_list, node)
2134 ent->flags |= BR_SGRP_F_DELETE;
2135
2136 memset(&src_ip, 0, sizeof(src_ip));
2137 src_ip.proto = pg->key.addr.proto;
2138 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2139 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2140 ent = br_multicast_find_group_src(pg, &src_ip);
2141 if (ent)
2142 ent->flags &= ~BR_SGRP_F_DELETE;
2143 else
2144 ent = br_multicast_new_group_src(pg, &src_ip);
2145 if (ent)
2146 br_multicast_fwd_src_handle(ent);
2147 }
2148
2149 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2150 grec_type);
2151
2152 __grp_src_delete_marked(pg);
2153}
2154
2155/* State Msg type New state Actions
2156 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
2157 * Delete (X-A)
2158 * Delete (Y-A)
2159 * Group Timer=GMI
2160 */
2161static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx,
2162 struct net_bridge_port_group *pg, void *h_addr,
2163 void *srcs, u32 nsrcs, size_t addr_size,
2164 int grec_type)
2165{
2166 struct net_bridge_group_src *ent;
2167 unsigned long now = jiffies;
2168 bool changed = false;
2169 struct br_ip src_ip;
2170 u32 src_idx;
2171
2172 hlist_for_each_entry(ent, &pg->src_list, node)
2173 ent->flags |= BR_SGRP_F_DELETE;
2174
2175 memset(&src_ip, 0, sizeof(src_ip));
2176 src_ip.proto = pg->key.addr.proto;
2177 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2178 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2179 ent = br_multicast_find_group_src(pg, &src_ip);
2180 if (ent) {
2181 ent->flags &= ~BR_SGRP_F_DELETE;
2182 } else {
2183 ent = br_multicast_new_group_src(pg, &src_ip);
2184 if (ent) {
2185 __grp_src_mod_timer(ent,
2186 now + br_multicast_gmi(brmctx));
2187 changed = true;
2188 }
2189 }
2190 }
2191
2192 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2193 grec_type))
2194 changed = true;
2195
2196 if (__grp_src_delete_marked(pg))
2197 changed = true;
2198
2199 return changed;
2200}
2201
2202static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx,
2203 struct net_bridge_port_group *pg, void *h_addr,
2204 void *srcs, u32 nsrcs, size_t addr_size,
2205 int grec_type)
2206{
2207 bool changed = false;
2208
2209 switch (pg->filter_mode) {
2210 case MCAST_INCLUDE:
2211 __grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2212 grec_type);
2213 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2214 changed = true;
2215 break;
2216 case MCAST_EXCLUDE:
2217 changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs,
2218 addr_size, grec_type);
2219 break;
2220 }
2221
2222 pg->filter_mode = MCAST_EXCLUDE;
2223 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
2224
2225 return changed;
2226}
2227
2228/* State Msg type New state Actions
2229 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
2230 * Send Q(G,A-B)
2231 */
2232static bool __grp_src_toin_incl(struct net_bridge_mcast *brmctx,
2233 struct net_bridge_mcast_port *pmctx,
2234 struct net_bridge_port_group *pg, void *h_addr,
2235 void *srcs, u32 nsrcs, size_t addr_size,
2236 int grec_type)
2237{
2238 u32 src_idx, to_send = pg->src_ents;
2239 struct net_bridge_group_src *ent;
2240 unsigned long now = jiffies;
2241 bool changed = false;
2242 struct br_ip src_ip;
2243
2244 hlist_for_each_entry(ent, &pg->src_list, node)
2245 ent->flags |= BR_SGRP_F_SEND;
2246
2247 memset(&src_ip, 0, sizeof(src_ip));
2248 src_ip.proto = pg->key.addr.proto;
2249 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2250 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2251 ent = br_multicast_find_group_src(pg, &src_ip);
2252 if (ent) {
2253 ent->flags &= ~BR_SGRP_F_SEND;
2254 to_send--;
2255 } else {
2256 ent = br_multicast_new_group_src(pg, &src_ip);
2257 if (ent)
2258 changed = true;
2259 }
2260 if (ent)
2261 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2262 }
2263
2264 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2265 grec_type))
2266 changed = true;
2267
2268 if (to_send)
2269 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2270
2271 return changed;
2272}
2273
2274/* State Msg type New state Actions
2275 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
2276 * Send Q(G,X-A)
2277 * Send Q(G)
2278 */
2279static bool __grp_src_toin_excl(struct net_bridge_mcast *brmctx,
2280 struct net_bridge_mcast_port *pmctx,
2281 struct net_bridge_port_group *pg, void *h_addr,
2282 void *srcs, u32 nsrcs, size_t addr_size,
2283 int grec_type)
2284{
2285 u32 src_idx, to_send = pg->src_ents;
2286 struct net_bridge_group_src *ent;
2287 unsigned long now = jiffies;
2288 bool changed = false;
2289 struct br_ip src_ip;
2290
2291 hlist_for_each_entry(ent, &pg->src_list, node)
2292 if (timer_pending(&ent->timer))
2293 ent->flags |= BR_SGRP_F_SEND;
2294
2295 memset(&src_ip, 0, sizeof(src_ip));
2296 src_ip.proto = pg->key.addr.proto;
2297 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2298 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2299 ent = br_multicast_find_group_src(pg, &src_ip);
2300 if (ent) {
2301 if (timer_pending(&ent->timer)) {
2302 ent->flags &= ~BR_SGRP_F_SEND;
2303 to_send--;
2304 }
2305 } else {
2306 ent = br_multicast_new_group_src(pg, &src_ip);
2307 if (ent)
2308 changed = true;
2309 }
2310 if (ent)
2311 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2312 }
2313
2314 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2315 grec_type))
2316 changed = true;
2317
2318 if (to_send)
2319 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2320
2321 __grp_send_query_and_rexmit(brmctx, pmctx, pg);
2322
2323 return changed;
2324}
2325
2326static bool br_multicast_toin(struct net_bridge_mcast *brmctx,
2327 struct net_bridge_mcast_port *pmctx,
2328 struct net_bridge_port_group *pg, void *h_addr,
2329 void *srcs, u32 nsrcs, size_t addr_size,
2330 int grec_type)
2331{
2332 bool changed = false;
2333
2334 switch (pg->filter_mode) {
2335 case MCAST_INCLUDE:
2336 changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs,
2337 nsrcs, addr_size, grec_type);
2338 break;
2339 case MCAST_EXCLUDE:
2340 changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs,
2341 nsrcs, addr_size, grec_type);
2342 break;
2343 }
2344
2345 if (br_multicast_eht_should_del_pg(pg)) {
2346 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2347 br_multicast_find_del_pg(pg->key.port->br, pg);
2348 /* a notification has already been sent and we shouldn't
2349 * access pg after the delete so we have to return false
2350 */
2351 changed = false;
2352 }
2353
2354 return changed;
2355}
2356
2357/* State Msg type New state Actions
2358 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2359 * Delete (A-B)
2360 * Send Q(G,A*B)
2361 * Group Timer=GMI
2362 */
2363static void __grp_src_toex_incl(struct net_bridge_mcast *brmctx,
2364 struct net_bridge_mcast_port *pmctx,
2365 struct net_bridge_port_group *pg, void *h_addr,
2366 void *srcs, u32 nsrcs, size_t addr_size,
2367 int grec_type)
2368{
2369 struct net_bridge_group_src *ent;
2370 u32 src_idx, to_send = 0;
2371 struct br_ip src_ip;
2372
2373 hlist_for_each_entry(ent, &pg->src_list, node)
2374 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2375
2376 memset(&src_ip, 0, sizeof(src_ip));
2377 src_ip.proto = pg->key.addr.proto;
2378 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2379 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2380 ent = br_multicast_find_group_src(pg, &src_ip);
2381 if (ent) {
2382 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2383 BR_SGRP_F_SEND;
2384 to_send++;
2385 } else {
2386 ent = br_multicast_new_group_src(pg, &src_ip);
2387 }
2388 if (ent)
2389 br_multicast_fwd_src_handle(ent);
2390 }
2391
2392 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2393 grec_type);
2394
2395 __grp_src_delete_marked(pg);
2396 if (to_send)
2397 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2398}
2399
2400/* State Msg type New state Actions
2401 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2402 * Delete (X-A)
2403 * Delete (Y-A)
2404 * Send Q(G,A-Y)
2405 * Group Timer=GMI
2406 */
2407static bool __grp_src_toex_excl(struct net_bridge_mcast *brmctx,
2408 struct net_bridge_mcast_port *pmctx,
2409 struct net_bridge_port_group *pg, void *h_addr,
2410 void *srcs, u32 nsrcs, size_t addr_size,
2411 int grec_type)
2412{
2413 struct net_bridge_group_src *ent;
2414 u32 src_idx, to_send = 0;
2415 bool changed = false;
2416 struct br_ip src_ip;
2417
2418 hlist_for_each_entry(ent, &pg->src_list, node)
2419 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2420
2421 memset(&src_ip, 0, sizeof(src_ip));
2422 src_ip.proto = pg->key.addr.proto;
2423 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2424 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2425 ent = br_multicast_find_group_src(pg, &src_ip);
2426 if (ent) {
2427 ent->flags &= ~BR_SGRP_F_DELETE;
2428 } else {
2429 ent = br_multicast_new_group_src(pg, &src_ip);
2430 if (ent) {
2431 __grp_src_mod_timer(ent, pg->timer.expires);
2432 changed = true;
2433 }
2434 }
2435 if (ent && timer_pending(&ent->timer)) {
2436 ent->flags |= BR_SGRP_F_SEND;
2437 to_send++;
2438 }
2439 }
2440
2441 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2442 grec_type))
2443 changed = true;
2444
2445 if (__grp_src_delete_marked(pg))
2446 changed = true;
2447 if (to_send)
2448 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2449
2450 return changed;
2451}
2452
2453static bool br_multicast_toex(struct net_bridge_mcast *brmctx,
2454 struct net_bridge_mcast_port *pmctx,
2455 struct net_bridge_port_group *pg, void *h_addr,
2456 void *srcs, u32 nsrcs, size_t addr_size,
2457 int grec_type)
2458{
2459 bool changed = false;
2460
2461 switch (pg->filter_mode) {
2462 case MCAST_INCLUDE:
2463 __grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs,
2464 addr_size, grec_type);
2465 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2466 changed = true;
2467 break;
2468 case MCAST_EXCLUDE:
2469 changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs,
2470 nsrcs, addr_size, grec_type);
2471 break;
2472 }
2473
2474 pg->filter_mode = MCAST_EXCLUDE;
2475 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
2476
2477 return changed;
2478}
2479
2480/* State Msg type New state Actions
2481 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2482 */
2483static bool __grp_src_block_incl(struct net_bridge_mcast *brmctx,
2484 struct net_bridge_mcast_port *pmctx,
2485 struct net_bridge_port_group *pg, void *h_addr,
2486 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2487{
2488 struct net_bridge_group_src *ent;
2489 u32 src_idx, to_send = 0;
2490 bool changed = false;
2491 struct br_ip src_ip;
2492
2493 hlist_for_each_entry(ent, &pg->src_list, node)
2494 ent->flags &= ~BR_SGRP_F_SEND;
2495
2496 memset(&src_ip, 0, sizeof(src_ip));
2497 src_ip.proto = pg->key.addr.proto;
2498 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2499 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2500 ent = br_multicast_find_group_src(pg, &src_ip);
2501 if (ent) {
2502 ent->flags |= BR_SGRP_F_SEND;
2503 to_send++;
2504 }
2505 }
2506
2507 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2508 grec_type))
2509 changed = true;
2510
2511 if (to_send)
2512 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2513
2514 return changed;
2515}
2516
2517/* State Msg type New state Actions
2518 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2519 * Send Q(G,A-Y)
2520 */
2521static bool __grp_src_block_excl(struct net_bridge_mcast *brmctx,
2522 struct net_bridge_mcast_port *pmctx,
2523 struct net_bridge_port_group *pg, void *h_addr,
2524 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2525{
2526 struct net_bridge_group_src *ent;
2527 u32 src_idx, to_send = 0;
2528 bool changed = false;
2529 struct br_ip src_ip;
2530
2531 hlist_for_each_entry(ent, &pg->src_list, node)
2532 ent->flags &= ~BR_SGRP_F_SEND;
2533
2534 memset(&src_ip, 0, sizeof(src_ip));
2535 src_ip.proto = pg->key.addr.proto;
2536 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2537 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2538 ent = br_multicast_find_group_src(pg, &src_ip);
2539 if (!ent) {
2540 ent = br_multicast_new_group_src(pg, &src_ip);
2541 if (ent) {
2542 __grp_src_mod_timer(ent, pg->timer.expires);
2543 changed = true;
2544 }
2545 }
2546 if (ent && timer_pending(&ent->timer)) {
2547 ent->flags |= BR_SGRP_F_SEND;
2548 to_send++;
2549 }
2550 }
2551
2552 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2553 grec_type))
2554 changed = true;
2555
2556 if (to_send)
2557 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2558
2559 return changed;
2560}
2561
2562static bool br_multicast_block(struct net_bridge_mcast *brmctx,
2563 struct net_bridge_mcast_port *pmctx,
2564 struct net_bridge_port_group *pg, void *h_addr,
2565 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2566{
2567 bool changed = false;
2568
2569 switch (pg->filter_mode) {
2570 case MCAST_INCLUDE:
2571 changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs,
2572 nsrcs, addr_size, grec_type);
2573 break;
2574 case MCAST_EXCLUDE:
2575 changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs,
2576 nsrcs, addr_size, grec_type);
2577 break;
2578 }
2579
2580 if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
2581 br_multicast_eht_should_del_pg(pg)) {
2582 if (br_multicast_eht_should_del_pg(pg))
2583 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2584 br_multicast_find_del_pg(pg->key.port->br, pg);
2585 /* a notification has already been sent and we shouldn't
2586 * access pg after the delete so we have to return false
2587 */
2588 changed = false;
2589 }
2590
2591 return changed;
2592}
2593
2594static struct net_bridge_port_group *
2595br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2596 struct net_bridge_port *p,
2597 const unsigned char *src)
2598{
2599 struct net_bridge *br __maybe_unused = mp->br;
2600 struct net_bridge_port_group *pg;
2601
2602 for (pg = mlock_dereference(mp->ports, br);
2603 pg;
2604 pg = mlock_dereference(pg->next, br))
2605 if (br_port_group_equal(pg, p, src))
2606 return pg;
2607
2608 return NULL;
2609}
2610
2611static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx,
2612 struct net_bridge_mcast_port *pmctx,
2613 struct sk_buff *skb,
2614 u16 vid)
2615{
2616 bool igmpv2 = brmctx->multicast_igmp_version == 2;
2617 struct net_bridge_mdb_entry *mdst;
2618 struct net_bridge_port_group *pg;
2619 const unsigned char *src;
2620 struct igmpv3_report *ih;
2621 struct igmpv3_grec *grec;
2622 int i, len, num, type;
2623 __be32 group, *h_addr;
2624 bool changed = false;
2625 int err = 0;
2626 u16 nsrcs;
2627
2628 ih = igmpv3_report_hdr(skb);
2629 num = ntohs(ih->ngrec);
2630 len = skb_transport_offset(skb) + sizeof(*ih);
2631
2632 for (i = 0; i < num; i++) {
2633 len += sizeof(*grec);
2634 if (!ip_mc_may_pull(skb, len))
2635 return -EINVAL;
2636
2637 grec = (void *)(skb->data + len - sizeof(*grec));
2638 group = grec->grec_mca;
2639 type = grec->grec_type;
2640 nsrcs = ntohs(grec->grec_nsrcs);
2641
2642 len += nsrcs * 4;
2643 if (!ip_mc_may_pull(skb, len))
2644 return -EINVAL;
2645
2646 switch (type) {
2647 case IGMPV3_MODE_IS_INCLUDE:
2648 case IGMPV3_MODE_IS_EXCLUDE:
2649 case IGMPV3_CHANGE_TO_INCLUDE:
2650 case IGMPV3_CHANGE_TO_EXCLUDE:
2651 case IGMPV3_ALLOW_NEW_SOURCES:
2652 case IGMPV3_BLOCK_OLD_SOURCES:
2653 break;
2654
2655 default:
2656 continue;
2657 }
2658
2659 src = eth_hdr(skb)->h_source;
2660 if (nsrcs == 0 &&
2661 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2662 type == IGMPV3_MODE_IS_INCLUDE)) {
2663 if (!pmctx || igmpv2) {
2664 br_ip4_multicast_leave_group(brmctx, pmctx,
2665 group, vid, src);
2666 continue;
2667 }
2668 } else {
2669 err = br_ip4_multicast_add_group(brmctx, pmctx, group,
2670 vid, src, igmpv2);
2671 if (err)
2672 break;
2673 }
2674
2675 if (!pmctx || igmpv2)
2676 continue;
2677
2678 spin_lock(&brmctx->br->multicast_lock);
2679 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2680 goto unlock_continue;
2681
2682 mdst = br_mdb_ip4_get(brmctx->br, group, vid);
2683 if (!mdst)
2684 goto unlock_continue;
2685 pg = br_multicast_find_port(mdst, pmctx->port, src);
2686 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2687 goto unlock_continue;
2688 /* reload grec and host addr */
2689 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
2690 h_addr = &ip_hdr(skb)->saddr;
2691 switch (type) {
2692 case IGMPV3_ALLOW_NEW_SOURCES:
2693 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2694 grec->grec_src,
2695 nsrcs, sizeof(__be32), type);
2696 break;
2697 case IGMPV3_MODE_IS_INCLUDE:
2698 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2699 grec->grec_src,
2700 nsrcs, sizeof(__be32), type);
2701 break;
2702 case IGMPV3_MODE_IS_EXCLUDE:
2703 changed = br_multicast_isexc(brmctx, pg, h_addr,
2704 grec->grec_src,
2705 nsrcs, sizeof(__be32), type);
2706 break;
2707 case IGMPV3_CHANGE_TO_INCLUDE:
2708 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
2709 grec->grec_src,
2710 nsrcs, sizeof(__be32), type);
2711 break;
2712 case IGMPV3_CHANGE_TO_EXCLUDE:
2713 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
2714 grec->grec_src,
2715 nsrcs, sizeof(__be32), type);
2716 break;
2717 case IGMPV3_BLOCK_OLD_SOURCES:
2718 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
2719 grec->grec_src,
2720 nsrcs, sizeof(__be32), type);
2721 break;
2722 }
2723 if (changed)
2724 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
2725unlock_continue:
2726 spin_unlock(&brmctx->br->multicast_lock);
2727 }
2728
2729 return err;
2730}
2731
2732#if IS_ENABLED(CONFIG_IPV6)
2733static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx,
2734 struct net_bridge_mcast_port *pmctx,
2735 struct sk_buff *skb,
2736 u16 vid)
2737{
2738 bool mldv1 = brmctx->multicast_mld_version == 1;
2739 struct net_bridge_mdb_entry *mdst;
2740 struct net_bridge_port_group *pg;
2741 unsigned int nsrcs_offset;
2742 struct mld2_report *mld2r;
2743 const unsigned char *src;
2744 struct in6_addr *h_addr;
2745 struct mld2_grec *grec;
2746 unsigned int grec_len;
2747 bool changed = false;
2748 int i, len, num;
2749 int err = 0;
2750
2751 if (!ipv6_mc_may_pull(skb, sizeof(*mld2r)))
2752 return -EINVAL;
2753
2754 mld2r = (struct mld2_report *)icmp6_hdr(skb);
2755 num = ntohs(mld2r->mld2r_ngrec);
2756 len = skb_transport_offset(skb) + sizeof(*mld2r);
2757
2758 for (i = 0; i < num; i++) {
2759 __be16 *_nsrcs, __nsrcs;
2760 u16 nsrcs;
2761
2762 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2763
2764 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
2765 nsrcs_offset + sizeof(__nsrcs))
2766 return -EINVAL;
2767
2768 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2769 sizeof(__nsrcs), &__nsrcs);
2770 if (!_nsrcs)
2771 return -EINVAL;
2772
2773 nsrcs = ntohs(*_nsrcs);
2774 grec_len = struct_size(grec, grec_src, nsrcs);
2775
2776 if (!ipv6_mc_may_pull(skb, len + grec_len))
2777 return -EINVAL;
2778
2779 grec = (struct mld2_grec *)(skb->data + len);
2780 len += grec_len;
2781
2782 switch (grec->grec_type) {
2783 case MLD2_MODE_IS_INCLUDE:
2784 case MLD2_MODE_IS_EXCLUDE:
2785 case MLD2_CHANGE_TO_INCLUDE:
2786 case MLD2_CHANGE_TO_EXCLUDE:
2787 case MLD2_ALLOW_NEW_SOURCES:
2788 case MLD2_BLOCK_OLD_SOURCES:
2789 break;
2790
2791 default:
2792 continue;
2793 }
2794
2795 src = eth_hdr(skb)->h_source;
2796 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2797 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
2798 nsrcs == 0) {
2799 if (!pmctx || mldv1) {
2800 br_ip6_multicast_leave_group(brmctx, pmctx,
2801 &grec->grec_mca,
2802 vid, src);
2803 continue;
2804 }
2805 } else {
2806 err = br_ip6_multicast_add_group(brmctx, pmctx,
2807 &grec->grec_mca, vid,
2808 src, mldv1);
2809 if (err)
2810 break;
2811 }
2812
2813 if (!pmctx || mldv1)
2814 continue;
2815
2816 spin_lock(&brmctx->br->multicast_lock);
2817 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2818 goto unlock_continue;
2819
2820 mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid);
2821 if (!mdst)
2822 goto unlock_continue;
2823 pg = br_multicast_find_port(mdst, pmctx->port, src);
2824 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2825 goto unlock_continue;
2826 h_addr = &ipv6_hdr(skb)->saddr;
2827 switch (grec->grec_type) {
2828 case MLD2_ALLOW_NEW_SOURCES:
2829 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2830 grec->grec_src, nsrcs,
2831 sizeof(struct in6_addr),
2832 grec->grec_type);
2833 break;
2834 case MLD2_MODE_IS_INCLUDE:
2835 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2836 grec->grec_src, nsrcs,
2837 sizeof(struct in6_addr),
2838 grec->grec_type);
2839 break;
2840 case MLD2_MODE_IS_EXCLUDE:
2841 changed = br_multicast_isexc(brmctx, pg, h_addr,
2842 grec->grec_src, nsrcs,
2843 sizeof(struct in6_addr),
2844 grec->grec_type);
2845 break;
2846 case MLD2_CHANGE_TO_INCLUDE:
2847 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
2848 grec->grec_src, nsrcs,
2849 sizeof(struct in6_addr),
2850 grec->grec_type);
2851 break;
2852 case MLD2_CHANGE_TO_EXCLUDE:
2853 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
2854 grec->grec_src, nsrcs,
2855 sizeof(struct in6_addr),
2856 grec->grec_type);
2857 break;
2858 case MLD2_BLOCK_OLD_SOURCES:
2859 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
2860 grec->grec_src, nsrcs,
2861 sizeof(struct in6_addr),
2862 grec->grec_type);
2863 break;
2864 }
2865 if (changed)
2866 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
2867unlock_continue:
2868 spin_unlock(&brmctx->br->multicast_lock);
2869 }
2870
2871 return err;
2872}
2873#endif
2874
2875static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx,
2876 struct net_bridge_mcast_port *pmctx,
2877 struct br_ip *saddr)
2878{
2879 int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0;
2880 struct timer_list *own_timer, *other_timer;
2881 struct bridge_mcast_querier *querier;
2882
2883 switch (saddr->proto) {
2884 case htons(ETH_P_IP):
2885 querier = &brmctx->ip4_querier;
2886 own_timer = &brmctx->ip4_own_query.timer;
2887 other_timer = &brmctx->ip4_other_query.timer;
2888 if (!querier->addr.src.ip4 ||
2889 ntohl(saddr->src.ip4) <= ntohl(querier->addr.src.ip4))
2890 goto update;
2891 break;
2892#if IS_ENABLED(CONFIG_IPV6)
2893 case htons(ETH_P_IPV6):
2894 querier = &brmctx->ip6_querier;
2895 own_timer = &brmctx->ip6_own_query.timer;
2896 other_timer = &brmctx->ip6_other_query.timer;
2897 if (ipv6_addr_cmp(&saddr->src.ip6, &querier->addr.src.ip6) <= 0)
2898 goto update;
2899 break;
2900#endif
2901 default:
2902 return false;
2903 }
2904
2905 if (!timer_pending(own_timer) && !timer_pending(other_timer))
2906 goto update;
2907
2908 return false;
2909
2910update:
2911 br_multicast_update_querier(brmctx, querier, port_ifidx, saddr);
2912
2913 return true;
2914}
2915
2916static struct net_bridge_port *
2917__br_multicast_get_querier_port(struct net_bridge *br,
2918 const struct bridge_mcast_querier *querier)
2919{
2920 int port_ifidx = READ_ONCE(querier->port_ifidx);
2921 struct net_bridge_port *p;
2922 struct net_device *dev;
2923
2924 if (port_ifidx == 0)
2925 return NULL;
2926
2927 dev = dev_get_by_index_rcu(dev_net(br->dev), port_ifidx);
2928 if (!dev)
2929 return NULL;
2930 p = br_port_get_rtnl_rcu(dev);
2931 if (!p || p->br != br)
2932 return NULL;
2933
2934 return p;
2935}
2936
2937size_t br_multicast_querier_state_size(void)
2938{
2939 return nla_total_size(0) + /* nest attribute */
2940 nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */
2941 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IP_PORT */
2942 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IP_OTHER_TIMER */
2943#if IS_ENABLED(CONFIG_IPV6)
2944 nla_total_size(sizeof(struct in6_addr)) + /* BRIDGE_QUERIER_IPV6_ADDRESS */
2945 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IPV6_PORT */
2946 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IPV6_OTHER_TIMER */
2947#endif
2948 0;
2949}
2950
2951/* protected by rtnl or rcu */
2952int br_multicast_dump_querier_state(struct sk_buff *skb,
2953 const struct net_bridge_mcast *brmctx,
2954 int nest_attr)
2955{
2956 struct bridge_mcast_querier querier = {};
2957 struct net_bridge_port *p;
2958 struct nlattr *nest;
2959
2960 if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
2961 br_multicast_ctx_vlan_global_disabled(brmctx))
2962 return 0;
2963
2964 nest = nla_nest_start(skb, nest_attr);
2965 if (!nest)
2966 return -EMSGSIZE;
2967
2968 rcu_read_lock();
2969 if (!brmctx->multicast_querier &&
2970 !timer_pending(&brmctx->ip4_other_query.timer))
2971 goto out_v6;
2972
2973 br_multicast_read_querier(&brmctx->ip4_querier, &querier);
2974 if (nla_put_in_addr(skb, BRIDGE_QUERIER_IP_ADDRESS,
2975 querier.addr.src.ip4)) {
2976 rcu_read_unlock();
2977 goto out_err;
2978 }
2979
2980 p = __br_multicast_get_querier_port(brmctx->br, &querier);
2981 if (timer_pending(&brmctx->ip4_other_query.timer) &&
2982 (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IP_OTHER_TIMER,
2983 br_timer_value(&brmctx->ip4_other_query.timer),
2984 BRIDGE_QUERIER_PAD) ||
2985 (p && nla_put_u32(skb, BRIDGE_QUERIER_IP_PORT, p->dev->ifindex)))) {
2986 rcu_read_unlock();
2987 goto out_err;
2988 }
2989
2990out_v6:
2991#if IS_ENABLED(CONFIG_IPV6)
2992 if (!brmctx->multicast_querier &&
2993 !timer_pending(&brmctx->ip6_other_query.timer))
2994 goto out;
2995
2996 br_multicast_read_querier(&brmctx->ip6_querier, &querier);
2997 if (nla_put_in6_addr(skb, BRIDGE_QUERIER_IPV6_ADDRESS,
2998 &querier.addr.src.ip6)) {
2999 rcu_read_unlock();
3000 goto out_err;
3001 }
3002
3003 p = __br_multicast_get_querier_port(brmctx->br, &querier);
3004 if (timer_pending(&brmctx->ip6_other_query.timer) &&
3005 (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IPV6_OTHER_TIMER,
3006 br_timer_value(&brmctx->ip6_other_query.timer),
3007 BRIDGE_QUERIER_PAD) ||
3008 (p && nla_put_u32(skb, BRIDGE_QUERIER_IPV6_PORT,
3009 p->dev->ifindex)))) {
3010 rcu_read_unlock();
3011 goto out_err;
3012 }
3013out:
3014#endif
3015 rcu_read_unlock();
3016 nla_nest_end(skb, nest);
3017 if (!nla_len(nest))
3018 nla_nest_cancel(skb, nest);
3019
3020 return 0;
3021
3022out_err:
3023 nla_nest_cancel(skb, nest);
3024 return -EMSGSIZE;
3025}
3026
3027static void
3028br_multicast_update_query_timer(struct net_bridge_mcast *brmctx,
3029 struct bridge_mcast_other_query *query,
3030 unsigned long max_delay)
3031{
3032 if (!timer_pending(&query->timer))
3033 query->delay_time = jiffies + max_delay;
3034
3035 mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval);
3036}
3037
3038static void br_port_mc_router_state_change(struct net_bridge_port *p,
3039 bool is_mc_router)
3040{
3041 struct switchdev_attr attr = {
3042 .orig_dev = p->dev,
3043 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
3044 .flags = SWITCHDEV_F_DEFER,
3045 .u.mrouter = is_mc_router,
3046 };
3047
3048 switchdev_port_attr_set(p->dev, &attr, NULL);
3049}
3050
3051static struct net_bridge_port *
3052br_multicast_rport_from_node(struct net_bridge_mcast *brmctx,
3053 struct hlist_head *mc_router_list,
3054 struct hlist_node *rlist)
3055{
3056 struct net_bridge_mcast_port *pmctx;
3057
3058#if IS_ENABLED(CONFIG_IPV6)
3059 if (mc_router_list == &brmctx->ip6_mc_router_list)
3060 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3061 ip6_rlist);
3062 else
3063#endif
3064 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3065 ip4_rlist);
3066
3067 return pmctx->port;
3068}
3069
3070static struct hlist_node *
3071br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx,
3072 struct net_bridge_port *port,
3073 struct hlist_head *mc_router_list)
3074
3075{
3076 struct hlist_node *slot = NULL;
3077 struct net_bridge_port *p;
3078 struct hlist_node *rlist;
3079
3080 hlist_for_each(rlist, mc_router_list) {
3081 p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist);
3082
3083 if ((unsigned long)port >= (unsigned long)p)
3084 break;
3085
3086 slot = rlist;
3087 }
3088
3089 return slot;
3090}
3091
3092static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx,
3093 struct hlist_node *rnode)
3094{
3095#if IS_ENABLED(CONFIG_IPV6)
3096 if (rnode != &pmctx->ip6_rlist)
3097 return hlist_unhashed(&pmctx->ip6_rlist);
3098 else
3099 return hlist_unhashed(&pmctx->ip4_rlist);
3100#else
3101 return true;
3102#endif
3103}
3104
3105/* Add port to router_list
3106 * list is maintained ordered by pointer value
3107 * and locked by br->multicast_lock and RCU
3108 */
3109static void br_multicast_add_router(struct net_bridge_mcast *brmctx,
3110 struct net_bridge_mcast_port *pmctx,
3111 struct hlist_node *rlist,
3112 struct hlist_head *mc_router_list)
3113{
3114 struct hlist_node *slot;
3115
3116 if (!hlist_unhashed(rlist))
3117 return;
3118
3119 slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list);
3120
3121 if (slot)
3122 hlist_add_behind_rcu(rlist, slot);
3123 else
3124 hlist_add_head_rcu(rlist, mc_router_list);
3125
3126 /* For backwards compatibility for now, only notify if we
3127 * switched from no IPv4/IPv6 multicast router to a new
3128 * IPv4 or IPv6 multicast router.
3129 */
3130 if (br_multicast_no_router_otherpf(pmctx, rlist)) {
3131 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB);
3132 br_port_mc_router_state_change(pmctx->port, true);
3133 }
3134}
3135
3136/* Add port to router_list
3137 * list is maintained ordered by pointer value
3138 * and locked by br->multicast_lock and RCU
3139 */
3140static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
3141 struct net_bridge_mcast_port *pmctx)
3142{
3143 br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist,
3144 &brmctx->ip4_mc_router_list);
3145}
3146
3147/* Add port to router_list
3148 * list is maintained ordered by pointer value
3149 * and locked by br->multicast_lock and RCU
3150 */
3151static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
3152 struct net_bridge_mcast_port *pmctx)
3153{
3154#if IS_ENABLED(CONFIG_IPV6)
3155 br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist,
3156 &brmctx->ip6_mc_router_list);
3157#endif
3158}
3159
3160static void br_multicast_mark_router(struct net_bridge_mcast *brmctx,
3161 struct net_bridge_mcast_port *pmctx,
3162 struct timer_list *timer,
3163 struct hlist_node *rlist,
3164 struct hlist_head *mc_router_list)
3165{
3166 unsigned long now = jiffies;
3167
3168 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3169 return;
3170
3171 if (!pmctx) {
3172 if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
3173 if (!br_ip4_multicast_is_router(brmctx) &&
3174 !br_ip6_multicast_is_router(brmctx))
3175 br_mc_router_state_change(brmctx->br, true);
3176 mod_timer(timer, now + brmctx->multicast_querier_interval);
3177 }
3178 return;
3179 }
3180
3181 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
3182 pmctx->multicast_router == MDB_RTR_TYPE_PERM)
3183 return;
3184
3185 br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list);
3186 mod_timer(timer, now + brmctx->multicast_querier_interval);
3187}
3188
3189static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx,
3190 struct net_bridge_mcast_port *pmctx)
3191{
3192 struct timer_list *timer = &brmctx->ip4_mc_router_timer;
3193 struct hlist_node *rlist = NULL;
3194
3195 if (pmctx) {
3196 timer = &pmctx->ip4_mc_router_timer;
3197 rlist = &pmctx->ip4_rlist;
3198 }
3199
3200 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3201 &brmctx->ip4_mc_router_list);
3202}
3203
3204static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx,
3205 struct net_bridge_mcast_port *pmctx)
3206{
3207#if IS_ENABLED(CONFIG_IPV6)
3208 struct timer_list *timer = &brmctx->ip6_mc_router_timer;
3209 struct hlist_node *rlist = NULL;
3210
3211 if (pmctx) {
3212 timer = &pmctx->ip6_mc_router_timer;
3213 rlist = &pmctx->ip6_rlist;
3214 }
3215
3216 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3217 &brmctx->ip6_mc_router_list);
3218#endif
3219}
3220
3221static void
3222br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx,
3223 struct net_bridge_mcast_port *pmctx,
3224 struct bridge_mcast_other_query *query,
3225 struct br_ip *saddr,
3226 unsigned long max_delay)
3227{
3228 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
3229 return;
3230
3231 br_multicast_update_query_timer(brmctx, query, max_delay);
3232 br_ip4_multicast_mark_router(brmctx, pmctx);
3233}
3234
3235#if IS_ENABLED(CONFIG_IPV6)
3236static void
3237br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx,
3238 struct net_bridge_mcast_port *pmctx,
3239 struct bridge_mcast_other_query *query,
3240 struct br_ip *saddr,
3241 unsigned long max_delay)
3242{
3243 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
3244 return;
3245
3246 br_multicast_update_query_timer(brmctx, query, max_delay);
3247 br_ip6_multicast_mark_router(brmctx, pmctx);
3248}
3249#endif
3250
3251static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx,
3252 struct net_bridge_mcast_port *pmctx,
3253 struct sk_buff *skb,
3254 u16 vid)
3255{
3256 unsigned int transport_len = ip_transport_len(skb);
3257 const struct iphdr *iph = ip_hdr(skb);
3258 struct igmphdr *ih = igmp_hdr(skb);
3259 struct net_bridge_mdb_entry *mp;
3260 struct igmpv3_query *ih3;
3261 struct net_bridge_port_group *p;
3262 struct net_bridge_port_group __rcu **pp;
3263 struct br_ip saddr = {};
3264 unsigned long max_delay;
3265 unsigned long now = jiffies;
3266 __be32 group;
3267
3268 spin_lock(&brmctx->br->multicast_lock);
3269 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3270 goto out;
3271
3272 group = ih->group;
3273
3274 if (transport_len == sizeof(*ih)) {
3275 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
3276
3277 if (!max_delay) {
3278 max_delay = 10 * HZ;
3279 group = 0;
3280 }
3281 } else if (transport_len >= sizeof(*ih3)) {
3282 ih3 = igmpv3_query_hdr(skb);
3283 if (ih3->nsrcs ||
3284 (brmctx->multicast_igmp_version == 3 && group &&
3285 ih3->suppress))
3286 goto out;
3287
3288 max_delay = ih3->code ?
3289 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
3290 } else {
3291 goto out;
3292 }
3293
3294 if (!group) {
3295 saddr.proto = htons(ETH_P_IP);
3296 saddr.src.ip4 = iph->saddr;
3297
3298 br_ip4_multicast_query_received(brmctx, pmctx,
3299 &brmctx->ip4_other_query,
3300 &saddr, max_delay);
3301 goto out;
3302 }
3303
3304 mp = br_mdb_ip4_get(brmctx->br, group, vid);
3305 if (!mp)
3306 goto out;
3307
3308 max_delay *= brmctx->multicast_last_member_count;
3309
3310 if (mp->host_joined &&
3311 (timer_pending(&mp->timer) ?
3312 time_after(mp->timer.expires, now + max_delay) :
3313 try_to_del_timer_sync(&mp->timer) >= 0))
3314 mod_timer(&mp->timer, now + max_delay);
3315
3316 for (pp = &mp->ports;
3317 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3318 pp = &p->next) {
3319 if (timer_pending(&p->timer) ?
3320 time_after(p->timer.expires, now + max_delay) :
3321 try_to_del_timer_sync(&p->timer) >= 0 &&
3322 (brmctx->multicast_igmp_version == 2 ||
3323 p->filter_mode == MCAST_EXCLUDE))
3324 mod_timer(&p->timer, now + max_delay);
3325 }
3326
3327out:
3328 spin_unlock(&brmctx->br->multicast_lock);
3329}
3330
3331#if IS_ENABLED(CONFIG_IPV6)
3332static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx,
3333 struct net_bridge_mcast_port *pmctx,
3334 struct sk_buff *skb,
3335 u16 vid)
3336{
3337 unsigned int transport_len = ipv6_transport_len(skb);
3338 struct mld_msg *mld;
3339 struct net_bridge_mdb_entry *mp;
3340 struct mld2_query *mld2q;
3341 struct net_bridge_port_group *p;
3342 struct net_bridge_port_group __rcu **pp;
3343 struct br_ip saddr = {};
3344 unsigned long max_delay;
3345 unsigned long now = jiffies;
3346 unsigned int offset = skb_transport_offset(skb);
3347 const struct in6_addr *group = NULL;
3348 bool is_general_query;
3349 int err = 0;
3350
3351 spin_lock(&brmctx->br->multicast_lock);
3352 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3353 goto out;
3354
3355 if (transport_len == sizeof(*mld)) {
3356 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
3357 err = -EINVAL;
3358 goto out;
3359 }
3360 mld = (struct mld_msg *) icmp6_hdr(skb);
3361 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
3362 if (max_delay)
3363 group = &mld->mld_mca;
3364 } else {
3365 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
3366 err = -EINVAL;
3367 goto out;
3368 }
3369 mld2q = (struct mld2_query *)icmp6_hdr(skb);
3370 if (!mld2q->mld2q_nsrcs)
3371 group = &mld2q->mld2q_mca;
3372 if (brmctx->multicast_mld_version == 2 &&
3373 !ipv6_addr_any(&mld2q->mld2q_mca) &&
3374 mld2q->mld2q_suppress)
3375 goto out;
3376
3377 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
3378 }
3379
3380 is_general_query = group && ipv6_addr_any(group);
3381
3382 if (is_general_query) {
3383 saddr.proto = htons(ETH_P_IPV6);
3384 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
3385
3386 br_ip6_multicast_query_received(brmctx, pmctx,
3387 &brmctx->ip6_other_query,
3388 &saddr, max_delay);
3389 goto out;
3390 } else if (!group) {
3391 goto out;
3392 }
3393
3394 mp = br_mdb_ip6_get(brmctx->br, group, vid);
3395 if (!mp)
3396 goto out;
3397
3398 max_delay *= brmctx->multicast_last_member_count;
3399 if (mp->host_joined &&
3400 (timer_pending(&mp->timer) ?
3401 time_after(mp->timer.expires, now + max_delay) :
3402 try_to_del_timer_sync(&mp->timer) >= 0))
3403 mod_timer(&mp->timer, now + max_delay);
3404
3405 for (pp = &mp->ports;
3406 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3407 pp = &p->next) {
3408 if (timer_pending(&p->timer) ?
3409 time_after(p->timer.expires, now + max_delay) :
3410 try_to_del_timer_sync(&p->timer) >= 0 &&
3411 (brmctx->multicast_mld_version == 1 ||
3412 p->filter_mode == MCAST_EXCLUDE))
3413 mod_timer(&p->timer, now + max_delay);
3414 }
3415
3416out:
3417 spin_unlock(&brmctx->br->multicast_lock);
3418 return err;
3419}
3420#endif
3421
3422static void
3423br_multicast_leave_group(struct net_bridge_mcast *brmctx,
3424 struct net_bridge_mcast_port *pmctx,
3425 struct br_ip *group,
3426 struct bridge_mcast_other_query *other_query,
3427 struct bridge_mcast_own_query *own_query,
3428 const unsigned char *src)
3429{
3430 struct net_bridge_mdb_entry *mp;
3431 struct net_bridge_port_group *p;
3432 unsigned long now;
3433 unsigned long time;
3434
3435 spin_lock(&brmctx->br->multicast_lock);
3436 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3437 goto out;
3438
3439 mp = br_mdb_ip_get(brmctx->br, group);
3440 if (!mp)
3441 goto out;
3442
3443 if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) {
3444 struct net_bridge_port_group __rcu **pp;
3445
3446 for (pp = &mp->ports;
3447 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3448 pp = &p->next) {
3449 if (!br_port_group_equal(p, pmctx->port, src))
3450 continue;
3451
3452 if (p->flags & MDB_PG_FLAGS_PERMANENT)
3453 break;
3454
3455 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
3456 br_multicast_del_pg(mp, p, pp);
3457 }
3458 goto out;
3459 }
3460
3461 if (timer_pending(&other_query->timer))
3462 goto out;
3463
3464 if (brmctx->multicast_querier) {
3465 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr,
3466 false, 0, NULL);
3467
3468 time = jiffies + brmctx->multicast_last_member_count *
3469 brmctx->multicast_last_member_interval;
3470
3471 mod_timer(&own_query->timer, time);
3472
3473 for (p = mlock_dereference(mp->ports, brmctx->br);
3474 p != NULL && pmctx != NULL;
3475 p = mlock_dereference(p->next, brmctx->br)) {
3476 if (!br_port_group_equal(p, pmctx->port, src))
3477 continue;
3478
3479 if (!hlist_unhashed(&p->mglist) &&
3480 (timer_pending(&p->timer) ?
3481 time_after(p->timer.expires, time) :
3482 try_to_del_timer_sync(&p->timer) >= 0)) {
3483 mod_timer(&p->timer, time);
3484 }
3485
3486 break;
3487 }
3488 }
3489
3490 now = jiffies;
3491 time = now + brmctx->multicast_last_member_count *
3492 brmctx->multicast_last_member_interval;
3493
3494 if (!pmctx) {
3495 if (mp->host_joined &&
3496 (timer_pending(&mp->timer) ?
3497 time_after(mp->timer.expires, time) :
3498 try_to_del_timer_sync(&mp->timer) >= 0)) {
3499 mod_timer(&mp->timer, time);
3500 }
3501
3502 goto out;
3503 }
3504
3505 for (p = mlock_dereference(mp->ports, brmctx->br);
3506 p != NULL;
3507 p = mlock_dereference(p->next, brmctx->br)) {
3508 if (p->key.port != pmctx->port)
3509 continue;
3510
3511 if (!hlist_unhashed(&p->mglist) &&
3512 (timer_pending(&p->timer) ?
3513 time_after(p->timer.expires, time) :
3514 try_to_del_timer_sync(&p->timer) >= 0)) {
3515 mod_timer(&p->timer, time);
3516 }
3517
3518 break;
3519 }
3520out:
3521 spin_unlock(&brmctx->br->multicast_lock);
3522}
3523
3524static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
3525 struct net_bridge_mcast_port *pmctx,
3526 __be32 group,
3527 __u16 vid,
3528 const unsigned char *src)
3529{
3530 struct br_ip br_group;
3531 struct bridge_mcast_own_query *own_query;
3532
3533 if (ipv4_is_local_multicast(group))
3534 return;
3535
3536 own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query;
3537
3538 memset(&br_group, 0, sizeof(br_group));
3539 br_group.dst.ip4 = group;
3540 br_group.proto = htons(ETH_P_IP);
3541 br_group.vid = vid;
3542
3543 br_multicast_leave_group(brmctx, pmctx, &br_group,
3544 &brmctx->ip4_other_query,
3545 own_query, src);
3546}
3547
3548#if IS_ENABLED(CONFIG_IPV6)
3549static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
3550 struct net_bridge_mcast_port *pmctx,
3551 const struct in6_addr *group,
3552 __u16 vid,
3553 const unsigned char *src)
3554{
3555 struct br_ip br_group;
3556 struct bridge_mcast_own_query *own_query;
3557
3558 if (ipv6_addr_is_ll_all_nodes(group))
3559 return;
3560
3561 own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query;
3562
3563 memset(&br_group, 0, sizeof(br_group));
3564 br_group.dst.ip6 = *group;
3565 br_group.proto = htons(ETH_P_IPV6);
3566 br_group.vid = vid;
3567
3568 br_multicast_leave_group(brmctx, pmctx, &br_group,
3569 &brmctx->ip6_other_query,
3570 own_query, src);
3571}
3572#endif
3573
3574static void br_multicast_err_count(const struct net_bridge *br,
3575 const struct net_bridge_port *p,
3576 __be16 proto)
3577{
3578 struct bridge_mcast_stats __percpu *stats;
3579 struct bridge_mcast_stats *pstats;
3580
3581 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
3582 return;
3583
3584 if (p)
3585 stats = p->mcast_stats;
3586 else
3587 stats = br->mcast_stats;
3588 if (WARN_ON(!stats))
3589 return;
3590
3591 pstats = this_cpu_ptr(stats);
3592
3593 u64_stats_update_begin(&pstats->syncp);
3594 switch (proto) {
3595 case htons(ETH_P_IP):
3596 pstats->mstats.igmp_parse_errors++;
3597 break;
3598#if IS_ENABLED(CONFIG_IPV6)
3599 case htons(ETH_P_IPV6):
3600 pstats->mstats.mld_parse_errors++;
3601 break;
3602#endif
3603 }
3604 u64_stats_update_end(&pstats->syncp);
3605}
3606
3607static void br_multicast_pim(struct net_bridge_mcast *brmctx,
3608 struct net_bridge_mcast_port *pmctx,
3609 const struct sk_buff *skb)
3610{
3611 unsigned int offset = skb_transport_offset(skb);
3612 struct pimhdr *pimhdr, _pimhdr;
3613
3614 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
3615 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
3616 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
3617 return;
3618
3619 spin_lock(&brmctx->br->multicast_lock);
3620 br_ip4_multicast_mark_router(brmctx, pmctx);
3621 spin_unlock(&brmctx->br->multicast_lock);
3622}
3623
3624static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3625 struct net_bridge_mcast_port *pmctx,
3626 struct sk_buff *skb)
3627{
3628 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3629 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3630 return -ENOMSG;
3631
3632 spin_lock(&brmctx->br->multicast_lock);
3633 br_ip4_multicast_mark_router(brmctx, pmctx);
3634 spin_unlock(&brmctx->br->multicast_lock);
3635
3636 return 0;
3637}
3638
3639static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
3640 struct net_bridge_mcast_port *pmctx,
3641 struct sk_buff *skb,
3642 u16 vid)
3643{
3644 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
3645 const unsigned char *src;
3646 struct igmphdr *ih;
3647 int err;
3648
3649 err = ip_mc_check_igmp(skb);
3650
3651 if (err == -ENOMSG) {
3652 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
3653 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3654 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3655 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
3656 br_multicast_pim(brmctx, pmctx, skb);
3657 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
3658 br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb);
3659 }
3660
3661 return 0;
3662 } else if (err < 0) {
3663 br_multicast_err_count(brmctx->br, p, skb->protocol);
3664 return err;
3665 }
3666
3667 ih = igmp_hdr(skb);
3668 src = eth_hdr(skb)->h_source;
3669 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
3670
3671 switch (ih->type) {
3672 case IGMP_HOST_MEMBERSHIP_REPORT:
3673 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3674 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3675 err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid,
3676 src, true);
3677 break;
3678 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3679 err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid);
3680 break;
3681 case IGMP_HOST_MEMBERSHIP_QUERY:
3682 br_ip4_multicast_query(brmctx, pmctx, skb, vid);
3683 break;
3684 case IGMP_HOST_LEAVE_MESSAGE:
3685 br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src);
3686 break;
3687 }
3688
3689 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
3690 BR_MCAST_DIR_RX);
3691
3692 return err;
3693}
3694
3695#if IS_ENABLED(CONFIG_IPV6)
3696static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3697 struct net_bridge_mcast_port *pmctx,
3698 struct sk_buff *skb)
3699{
3700 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
3701 return;
3702
3703 spin_lock(&brmctx->br->multicast_lock);
3704 br_ip6_multicast_mark_router(brmctx, pmctx);
3705 spin_unlock(&brmctx->br->multicast_lock);
3706}
3707
3708static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
3709 struct net_bridge_mcast_port *pmctx,
3710 struct sk_buff *skb,
3711 u16 vid)
3712{
3713 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
3714 const unsigned char *src;
3715 struct mld_msg *mld;
3716 int err;
3717
3718 err = ipv6_mc_check_mld(skb);
3719
3720 if (err == -ENOMSG || err == -ENODATA) {
3721 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3722 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3723 if (err == -ENODATA &&
3724 ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
3725 br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
3726
3727 return 0;
3728 } else if (err < 0) {
3729 br_multicast_err_count(brmctx->br, p, skb->protocol);
3730 return err;
3731 }
3732
3733 mld = (struct mld_msg *)skb_transport_header(skb);
3734 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
3735
3736 switch (mld->mld_type) {
3737 case ICMPV6_MGM_REPORT:
3738 src = eth_hdr(skb)->h_source;
3739 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3740 err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca,
3741 vid, src, true);
3742 break;
3743 case ICMPV6_MLD2_REPORT:
3744 err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid);
3745 break;
3746 case ICMPV6_MGM_QUERY:
3747 err = br_ip6_multicast_query(brmctx, pmctx, skb, vid);
3748 break;
3749 case ICMPV6_MGM_REDUCTION:
3750 src = eth_hdr(skb)->h_source;
3751 br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid,
3752 src);
3753 break;
3754 }
3755
3756 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
3757 BR_MCAST_DIR_RX);
3758
3759 return err;
3760}
3761#endif
3762
3763int br_multicast_rcv(struct net_bridge_mcast **brmctx,
3764 struct net_bridge_mcast_port **pmctx,
3765 struct net_bridge_vlan *vlan,
3766 struct sk_buff *skb, u16 vid)
3767{
3768 int ret = 0;
3769
3770 BR_INPUT_SKB_CB(skb)->igmp = 0;
3771 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3772
3773 if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED))
3774 return 0;
3775
3776 if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) {
3777 const struct net_bridge_vlan *masterv;
3778
3779 /* the vlan has the master flag set only when transmitting
3780 * through the bridge device
3781 */
3782 if (br_vlan_is_master(vlan)) {
3783 masterv = vlan;
3784 *brmctx = &vlan->br_mcast_ctx;
3785 *pmctx = NULL;
3786 } else {
3787 masterv = vlan->brvlan;
3788 *brmctx = &vlan->brvlan->br_mcast_ctx;
3789 *pmctx = &vlan->port_mcast_ctx;
3790 }
3791
3792 if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
3793 return 0;
3794 }
3795
3796 switch (skb->protocol) {
3797 case htons(ETH_P_IP):
3798 ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid);
3799 break;
3800#if IS_ENABLED(CONFIG_IPV6)
3801 case htons(ETH_P_IPV6):
3802 ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid);
3803 break;
3804#endif
3805 }
3806
3807 return ret;
3808}
3809
3810static void br_multicast_query_expired(struct net_bridge_mcast *brmctx,
3811 struct bridge_mcast_own_query *query,
3812 struct bridge_mcast_querier *querier)
3813{
3814 spin_lock(&brmctx->br->multicast_lock);
3815 if (br_multicast_ctx_vlan_disabled(brmctx))
3816 goto out;
3817
3818 if (query->startup_sent < brmctx->multicast_startup_query_count)
3819 query->startup_sent++;
3820
3821 br_multicast_send_query(brmctx, NULL, query);
3822out:
3823 spin_unlock(&brmctx->br->multicast_lock);
3824}
3825
3826static void br_ip4_multicast_query_expired(struct timer_list *t)
3827{
3828 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
3829 ip4_own_query.timer);
3830
3831 br_multicast_query_expired(brmctx, &brmctx->ip4_own_query,
3832 &brmctx->ip4_querier);
3833}
3834
3835#if IS_ENABLED(CONFIG_IPV6)
3836static void br_ip6_multicast_query_expired(struct timer_list *t)
3837{
3838 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
3839 ip6_own_query.timer);
3840
3841 br_multicast_query_expired(brmctx, &brmctx->ip6_own_query,
3842 &brmctx->ip6_querier);
3843}
3844#endif
3845
3846static void br_multicast_gc_work(struct work_struct *work)
3847{
3848 struct net_bridge *br = container_of(work, struct net_bridge,
3849 mcast_gc_work);
3850 HLIST_HEAD(deleted_head);
3851
3852 spin_lock_bh(&br->multicast_lock);
3853 hlist_move_list(&br->mcast_gc_list, &deleted_head);
3854 spin_unlock_bh(&br->multicast_lock);
3855
3856 br_multicast_gc(&deleted_head);
3857}
3858
3859void br_multicast_ctx_init(struct net_bridge *br,
3860 struct net_bridge_vlan *vlan,
3861 struct net_bridge_mcast *brmctx)
3862{
3863 brmctx->br = br;
3864 brmctx->vlan = vlan;
3865 brmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
3866 brmctx->multicast_last_member_count = 2;
3867 brmctx->multicast_startup_query_count = 2;
3868
3869 brmctx->multicast_last_member_interval = HZ;
3870 brmctx->multicast_query_response_interval = 10 * HZ;
3871 brmctx->multicast_startup_query_interval = 125 * HZ / 4;
3872 brmctx->multicast_query_interval = 125 * HZ;
3873 brmctx->multicast_querier_interval = 255 * HZ;
3874 brmctx->multicast_membership_interval = 260 * HZ;
3875
3876 brmctx->ip4_other_query.delay_time = 0;
3877 brmctx->ip4_querier.port_ifidx = 0;
3878 seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock);
3879 brmctx->multicast_igmp_version = 2;
3880#if IS_ENABLED(CONFIG_IPV6)
3881 brmctx->multicast_mld_version = 1;
3882 brmctx->ip6_other_query.delay_time = 0;
3883 brmctx->ip6_querier.port_ifidx = 0;
3884 seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock);
3885#endif
3886
3887 timer_setup(&brmctx->ip4_mc_router_timer,
3888 br_ip4_multicast_local_router_expired, 0);
3889 timer_setup(&brmctx->ip4_other_query.timer,
3890 br_ip4_multicast_querier_expired, 0);
3891 timer_setup(&brmctx->ip4_own_query.timer,
3892 br_ip4_multicast_query_expired, 0);
3893#if IS_ENABLED(CONFIG_IPV6)
3894 timer_setup(&brmctx->ip6_mc_router_timer,
3895 br_ip6_multicast_local_router_expired, 0);
3896 timer_setup(&brmctx->ip6_other_query.timer,
3897 br_ip6_multicast_querier_expired, 0);
3898 timer_setup(&brmctx->ip6_own_query.timer,
3899 br_ip6_multicast_query_expired, 0);
3900#endif
3901}
3902
3903void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
3904{
3905 __br_multicast_stop(brmctx);
3906}
3907
3908void br_multicast_init(struct net_bridge *br)
3909{
3910 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
3911
3912 br_multicast_ctx_init(br, NULL, &br->multicast_ctx);
3913
3914 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
3915 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
3916
3917 spin_lock_init(&br->multicast_lock);
3918 INIT_HLIST_HEAD(&br->mdb_list);
3919 INIT_HLIST_HEAD(&br->mcast_gc_list);
3920 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
3921}
3922
3923static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
3924{
3925 struct in_device *in_dev = in_dev_get(br->dev);
3926
3927 if (!in_dev)
3928 return;
3929
3930 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
3931 in_dev_put(in_dev);
3932}
3933
3934#if IS_ENABLED(CONFIG_IPV6)
3935static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3936{
3937 struct in6_addr addr;
3938
3939 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3940 ipv6_dev_mc_inc(br->dev, &addr);
3941}
3942#else
3943static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
3944{
3945}
3946#endif
3947
3948void br_multicast_join_snoopers(struct net_bridge *br)
3949{
3950 br_ip4_multicast_join_snoopers(br);
3951 br_ip6_multicast_join_snoopers(br);
3952}
3953
3954static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
3955{
3956 struct in_device *in_dev = in_dev_get(br->dev);
3957
3958 if (WARN_ON(!in_dev))
3959 return;
3960
3961 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
3962 in_dev_put(in_dev);
3963}
3964
3965#if IS_ENABLED(CONFIG_IPV6)
3966static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3967{
3968 struct in6_addr addr;
3969
3970 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
3971 ipv6_dev_mc_dec(br->dev, &addr);
3972}
3973#else
3974static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
3975{
3976}
3977#endif
3978
3979void br_multicast_leave_snoopers(struct net_bridge *br)
3980{
3981 br_ip4_multicast_leave_snoopers(br);
3982 br_ip6_multicast_leave_snoopers(br);
3983}
3984
3985static void __br_multicast_open_query(struct net_bridge *br,
3986 struct bridge_mcast_own_query *query)
3987{
3988 query->startup_sent = 0;
3989
3990 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
3991 return;
3992
3993 mod_timer(&query->timer, jiffies);
3994}
3995
3996static void __br_multicast_open(struct net_bridge_mcast *brmctx)
3997{
3998 __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query);
3999#if IS_ENABLED(CONFIG_IPV6)
4000 __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query);
4001#endif
4002}
4003
4004void br_multicast_open(struct net_bridge *br)
4005{
4006 ASSERT_RTNL();
4007
4008 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4009 struct net_bridge_vlan_group *vg;
4010 struct net_bridge_vlan *vlan;
4011
4012 vg = br_vlan_group(br);
4013 if (vg) {
4014 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4015 struct net_bridge_mcast *brmctx;
4016
4017 brmctx = &vlan->br_mcast_ctx;
4018 if (br_vlan_is_brentry(vlan) &&
4019 !br_multicast_ctx_vlan_disabled(brmctx))
4020 __br_multicast_open(&vlan->br_mcast_ctx);
4021 }
4022 }
4023 } else {
4024 __br_multicast_open(&br->multicast_ctx);
4025 }
4026}
4027
4028static void __br_multicast_stop(struct net_bridge_mcast *brmctx)
4029{
4030 del_timer_sync(&brmctx->ip4_mc_router_timer);
4031 del_timer_sync(&brmctx->ip4_other_query.timer);
4032 del_timer_sync(&brmctx->ip4_own_query.timer);
4033#if IS_ENABLED(CONFIG_IPV6)
4034 del_timer_sync(&brmctx->ip6_mc_router_timer);
4035 del_timer_sync(&brmctx->ip6_other_query.timer);
4036 del_timer_sync(&brmctx->ip6_own_query.timer);
4037#endif
4038}
4039
4040void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on)
4041{
4042 struct net_bridge *br;
4043
4044 /* it's okay to check for the flag without the multicast lock because it
4045 * can only change under RTNL -> multicast_lock, we need the latter to
4046 * sync with timers and packets
4047 */
4048 if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED))
4049 return;
4050
4051 if (br_vlan_is_master(vlan)) {
4052 br = vlan->br;
4053
4054 if (!br_vlan_is_brentry(vlan) ||
4055 (on &&
4056 br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx)))
4057 return;
4058
4059 spin_lock_bh(&br->multicast_lock);
4060 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4061 spin_unlock_bh(&br->multicast_lock);
4062
4063 if (on)
4064 __br_multicast_open(&vlan->br_mcast_ctx);
4065 else
4066 __br_multicast_stop(&vlan->br_mcast_ctx);
4067 } else {
4068 struct net_bridge_mcast *brmctx;
4069
4070 brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx);
4071 if (on && br_multicast_ctx_vlan_global_disabled(brmctx))
4072 return;
4073
4074 br = vlan->port->br;
4075 spin_lock_bh(&br->multicast_lock);
4076 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4077 if (on)
4078 __br_multicast_enable_port_ctx(&vlan->port_mcast_ctx);
4079 else
4080 __br_multicast_disable_port_ctx(&vlan->port_mcast_ctx);
4081 spin_unlock_bh(&br->multicast_lock);
4082 }
4083}
4084
4085static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on)
4086{
4087 struct net_bridge_port *p;
4088
4089 if (WARN_ON_ONCE(!br_vlan_is_master(vlan)))
4090 return;
4091
4092 list_for_each_entry(p, &vlan->br->port_list, list) {
4093 struct net_bridge_vlan *vport;
4094
4095 vport = br_vlan_find(nbp_vlan_group(p), vlan->vid);
4096 if (!vport)
4097 continue;
4098 br_multicast_toggle_one_vlan(vport, on);
4099 }
4100
4101 if (br_vlan_is_brentry(vlan))
4102 br_multicast_toggle_one_vlan(vlan, on);
4103}
4104
4105int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
4106 struct netlink_ext_ack *extack)
4107{
4108 struct net_bridge_vlan_group *vg;
4109 struct net_bridge_vlan *vlan;
4110 struct net_bridge_port *p;
4111
4112 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on)
4113 return 0;
4114
4115 if (on && !br_opt_get(br, BROPT_VLAN_ENABLED)) {
4116 NL_SET_ERR_MSG_MOD(extack, "Cannot enable multicast vlan snooping with vlan filtering disabled");
4117 return -EINVAL;
4118 }
4119
4120 vg = br_vlan_group(br);
4121 if (!vg)
4122 return 0;
4123
4124 br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on);
4125
4126 /* disable/enable non-vlan mcast contexts based on vlan snooping */
4127 if (on)
4128 __br_multicast_stop(&br->multicast_ctx);
4129 else
4130 __br_multicast_open(&br->multicast_ctx);
4131 list_for_each_entry(p, &br->port_list, list) {
4132 if (on)
4133 br_multicast_disable_port(p);
4134 else
4135 br_multicast_enable_port(p);
4136 }
4137
4138 list_for_each_entry(vlan, &vg->vlan_list, vlist)
4139 br_multicast_toggle_vlan(vlan, on);
4140
4141 return 0;
4142}
4143
4144bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on)
4145{
4146 ASSERT_RTNL();
4147
4148 /* BR_VLFLAG_GLOBAL_MCAST_ENABLED relies on eventual consistency and
4149 * requires only RTNL to change
4150 */
4151 if (on == !!(vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
4152 return false;
4153
4154 vlan->priv_flags ^= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
4155 br_multicast_toggle_vlan(vlan, on);
4156
4157 return true;
4158}
4159
4160void br_multicast_stop(struct net_bridge *br)
4161{
4162 ASSERT_RTNL();
4163
4164 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4165 struct net_bridge_vlan_group *vg;
4166 struct net_bridge_vlan *vlan;
4167
4168 vg = br_vlan_group(br);
4169 if (vg) {
4170 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4171 struct net_bridge_mcast *brmctx;
4172
4173 brmctx = &vlan->br_mcast_ctx;
4174 if (br_vlan_is_brentry(vlan) &&
4175 !br_multicast_ctx_vlan_disabled(brmctx))
4176 __br_multicast_stop(&vlan->br_mcast_ctx);
4177 }
4178 }
4179 } else {
4180 __br_multicast_stop(&br->multicast_ctx);
4181 }
4182}
4183
4184void br_multicast_dev_del(struct net_bridge *br)
4185{
4186 struct net_bridge_mdb_entry *mp;
4187 HLIST_HEAD(deleted_head);
4188 struct hlist_node *tmp;
4189
4190 spin_lock_bh(&br->multicast_lock);
4191 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
4192 br_multicast_del_mdb_entry(mp);
4193 hlist_move_list(&br->mcast_gc_list, &deleted_head);
4194 spin_unlock_bh(&br->multicast_lock);
4195
4196 br_multicast_ctx_deinit(&br->multicast_ctx);
4197 br_multicast_gc(&deleted_head);
4198 cancel_work_sync(&br->mcast_gc_work);
4199
4200 rcu_barrier();
4201}
4202
4203int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val)
4204{
4205 int err = -EINVAL;
4206
4207 spin_lock_bh(&brmctx->br->multicast_lock);
4208
4209 switch (val) {
4210 case MDB_RTR_TYPE_DISABLED:
4211 case MDB_RTR_TYPE_PERM:
4212 br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM);
4213 del_timer(&brmctx->ip4_mc_router_timer);
4214#if IS_ENABLED(CONFIG_IPV6)
4215 del_timer(&brmctx->ip6_mc_router_timer);
4216#endif
4217 brmctx->multicast_router = val;
4218 err = 0;
4219 break;
4220 case MDB_RTR_TYPE_TEMP_QUERY:
4221 if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
4222 br_mc_router_state_change(brmctx->br, false);
4223 brmctx->multicast_router = val;
4224 err = 0;
4225 break;
4226 }
4227
4228 spin_unlock_bh(&brmctx->br->multicast_lock);
4229
4230 return err;
4231}
4232
4233static void
4234br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted)
4235{
4236 if (!deleted)
4237 return;
4238
4239 /* For backwards compatibility for now, only notify if there is
4240 * no multicast router anymore for both IPv4 and IPv6.
4241 */
4242 if (!hlist_unhashed(&pmctx->ip4_rlist))
4243 return;
4244#if IS_ENABLED(CONFIG_IPV6)
4245 if (!hlist_unhashed(&pmctx->ip6_rlist))
4246 return;
4247#endif
4248
4249 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB);
4250 br_port_mc_router_state_change(pmctx->port, false);
4251
4252 /* don't allow timer refresh */
4253 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP)
4254 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4255}
4256
4257int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
4258 unsigned long val)
4259{
4260 struct net_bridge_mcast *brmctx;
4261 unsigned long now = jiffies;
4262 int err = -EINVAL;
4263 bool del = false;
4264
4265 brmctx = br_multicast_port_ctx_get_global(pmctx);
4266 spin_lock_bh(&brmctx->br->multicast_lock);
4267 if (pmctx->multicast_router == val) {
4268 /* Refresh the temp router port timer */
4269 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) {
4270 mod_timer(&pmctx->ip4_mc_router_timer,
4271 now + brmctx->multicast_querier_interval);
4272#if IS_ENABLED(CONFIG_IPV6)
4273 mod_timer(&pmctx->ip6_mc_router_timer,
4274 now + brmctx->multicast_querier_interval);
4275#endif
4276 }
4277 err = 0;
4278 goto unlock;
4279 }
4280 switch (val) {
4281 case MDB_RTR_TYPE_DISABLED:
4282 pmctx->multicast_router = MDB_RTR_TYPE_DISABLED;
4283 del |= br_ip4_multicast_rport_del(pmctx);
4284 del_timer(&pmctx->ip4_mc_router_timer);
4285 del |= br_ip6_multicast_rport_del(pmctx);
4286#if IS_ENABLED(CONFIG_IPV6)
4287 del_timer(&pmctx->ip6_mc_router_timer);
4288#endif
4289 br_multicast_rport_del_notify(pmctx, del);
4290 break;
4291 case MDB_RTR_TYPE_TEMP_QUERY:
4292 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4293 del |= br_ip4_multicast_rport_del(pmctx);
4294 del |= br_ip6_multicast_rport_del(pmctx);
4295 br_multicast_rport_del_notify(pmctx, del);
4296 break;
4297 case MDB_RTR_TYPE_PERM:
4298 pmctx->multicast_router = MDB_RTR_TYPE_PERM;
4299 del_timer(&pmctx->ip4_mc_router_timer);
4300 br_ip4_multicast_add_router(brmctx, pmctx);
4301#if IS_ENABLED(CONFIG_IPV6)
4302 del_timer(&pmctx->ip6_mc_router_timer);
4303#endif
4304 br_ip6_multicast_add_router(brmctx, pmctx);
4305 break;
4306 case MDB_RTR_TYPE_TEMP:
4307 pmctx->multicast_router = MDB_RTR_TYPE_TEMP;
4308 br_ip4_multicast_mark_router(brmctx, pmctx);
4309 br_ip6_multicast_mark_router(brmctx, pmctx);
4310 break;
4311 default:
4312 goto unlock;
4313 }
4314 err = 0;
4315unlock:
4316 spin_unlock_bh(&brmctx->br->multicast_lock);
4317
4318 return err;
4319}
4320
4321int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router)
4322{
4323 int err;
4324
4325 if (br_vlan_is_master(v))
4326 err = br_multicast_set_router(&v->br_mcast_ctx, mcast_router);
4327 else
4328 err = br_multicast_set_port_router(&v->port_mcast_ctx,
4329 mcast_router);
4330
4331 return err;
4332}
4333
4334static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
4335 struct bridge_mcast_own_query *query)
4336{
4337 struct net_bridge_port *port;
4338
4339 if (!br_multicast_ctx_matches_vlan_snooping(brmctx))
4340 return;
4341
4342 __br_multicast_open_query(brmctx->br, query);
4343
4344 rcu_read_lock();
4345 list_for_each_entry_rcu(port, &brmctx->br->port_list, list) {
4346 struct bridge_mcast_own_query *ip4_own_query;
4347#if IS_ENABLED(CONFIG_IPV6)
4348 struct bridge_mcast_own_query *ip6_own_query;
4349#endif
4350
4351 if (br_multicast_port_ctx_state_stopped(&port->multicast_ctx))
4352 continue;
4353
4354 if (br_multicast_ctx_is_vlan(brmctx)) {
4355 struct net_bridge_vlan *vlan;
4356
4357 vlan = br_vlan_find(nbp_vlan_group_rcu(port),
4358 brmctx->vlan->vid);
4359 if (!vlan ||
4360 br_multicast_port_ctx_state_stopped(&vlan->port_mcast_ctx))
4361 continue;
4362
4363 ip4_own_query = &vlan->port_mcast_ctx.ip4_own_query;
4364#if IS_ENABLED(CONFIG_IPV6)
4365 ip6_own_query = &vlan->port_mcast_ctx.ip6_own_query;
4366#endif
4367 } else {
4368 ip4_own_query = &port->multicast_ctx.ip4_own_query;
4369#if IS_ENABLED(CONFIG_IPV6)
4370 ip6_own_query = &port->multicast_ctx.ip6_own_query;
4371#endif
4372 }
4373
4374 if (query == &brmctx->ip4_own_query)
4375 br_multicast_enable(ip4_own_query);
4376#if IS_ENABLED(CONFIG_IPV6)
4377 else
4378 br_multicast_enable(ip6_own_query);
4379#endif
4380 }
4381 rcu_read_unlock();
4382}
4383
4384int br_multicast_toggle(struct net_bridge *br, unsigned long val,
4385 struct netlink_ext_ack *extack)
4386{
4387 struct net_bridge_port *port;
4388 bool change_snoopers = false;
4389 int err = 0;
4390
4391 spin_lock_bh(&br->multicast_lock);
4392 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
4393 goto unlock;
4394
4395 err = br_mc_disabled_update(br->dev, val, extack);
4396 if (err == -EOPNOTSUPP)
4397 err = 0;
4398 if (err)
4399 goto unlock;
4400
4401 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4402 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
4403 change_snoopers = true;
4404 goto unlock;
4405 }
4406
4407 if (!netif_running(br->dev))
4408 goto unlock;
4409
4410 br_multicast_open(br);
4411 list_for_each_entry(port, &br->port_list, list)
4412 __br_multicast_enable_port_ctx(&port->multicast_ctx);
4413
4414 change_snoopers = true;
4415
4416unlock:
4417 spin_unlock_bh(&br->multicast_lock);
4418
4419 /* br_multicast_join_snoopers has the potential to cause
4420 * an MLD Report/Leave to be delivered to br_multicast_rcv,
4421 * which would in turn call br_multicast_add_group, which would
4422 * attempt to acquire multicast_lock. This function should be
4423 * called after the lock has been released to avoid deadlocks on
4424 * multicast_lock.
4425 *
4426 * br_multicast_leave_snoopers does not have the problem since
4427 * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
4428 * returns without calling br_multicast_ipv4/6_rcv if it's not
4429 * enabled. Moved both functions out just for symmetry.
4430 */
4431 if (change_snoopers) {
4432 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
4433 br_multicast_join_snoopers(br);
4434 else
4435 br_multicast_leave_snoopers(br);
4436 }
4437
4438 return err;
4439}
4440
4441bool br_multicast_enabled(const struct net_device *dev)
4442{
4443 struct net_bridge *br = netdev_priv(dev);
4444
4445 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
4446}
4447EXPORT_SYMBOL_GPL(br_multicast_enabled);
4448
4449bool br_multicast_router(const struct net_device *dev)
4450{
4451 struct net_bridge *br = netdev_priv(dev);
4452 bool is_router;
4453
4454 spin_lock_bh(&br->multicast_lock);
4455 is_router = br_multicast_is_router(&br->multicast_ctx, NULL);
4456 spin_unlock_bh(&br->multicast_lock);
4457 return is_router;
4458}
4459EXPORT_SYMBOL_GPL(br_multicast_router);
4460
4461int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val)
4462{
4463 unsigned long max_delay;
4464
4465 val = !!val;
4466
4467 spin_lock_bh(&brmctx->br->multicast_lock);
4468 if (brmctx->multicast_querier == val)
4469 goto unlock;
4470
4471 WRITE_ONCE(brmctx->multicast_querier, val);
4472 if (!val)
4473 goto unlock;
4474
4475 max_delay = brmctx->multicast_query_response_interval;
4476
4477 if (!timer_pending(&brmctx->ip4_other_query.timer))
4478 brmctx->ip4_other_query.delay_time = jiffies + max_delay;
4479
4480 br_multicast_start_querier(brmctx, &brmctx->ip4_own_query);
4481
4482#if IS_ENABLED(CONFIG_IPV6)
4483 if (!timer_pending(&brmctx->ip6_other_query.timer))
4484 brmctx->ip6_other_query.delay_time = jiffies + max_delay;
4485
4486 br_multicast_start_querier(brmctx, &brmctx->ip6_own_query);
4487#endif
4488
4489unlock:
4490 spin_unlock_bh(&brmctx->br->multicast_lock);
4491
4492 return 0;
4493}
4494
4495int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
4496 unsigned long val)
4497{
4498 /* Currently we support only version 2 and 3 */
4499 switch (val) {
4500 case 2:
4501 case 3:
4502 break;
4503 default:
4504 return -EINVAL;
4505 }
4506
4507 spin_lock_bh(&brmctx->br->multicast_lock);
4508 brmctx->multicast_igmp_version = val;
4509 spin_unlock_bh(&brmctx->br->multicast_lock);
4510
4511 return 0;
4512}
4513
4514#if IS_ENABLED(CONFIG_IPV6)
4515int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
4516 unsigned long val)
4517{
4518 /* Currently we support version 1 and 2 */
4519 switch (val) {
4520 case 1:
4521 case 2:
4522 break;
4523 default:
4524 return -EINVAL;
4525 }
4526
4527 spin_lock_bh(&brmctx->br->multicast_lock);
4528 brmctx->multicast_mld_version = val;
4529 spin_unlock_bh(&brmctx->br->multicast_lock);
4530
4531 return 0;
4532}
4533#endif
4534
4535void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
4536 unsigned long val)
4537{
4538 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4539
4540 if (intvl_jiffies < BR_MULTICAST_QUERY_INTVL_MIN) {
4541 br_info(brmctx->br,
4542 "trying to set multicast query interval below minimum, setting to %lu (%ums)\n",
4543 jiffies_to_clock_t(BR_MULTICAST_QUERY_INTVL_MIN),
4544 jiffies_to_msecs(BR_MULTICAST_QUERY_INTVL_MIN));
4545 intvl_jiffies = BR_MULTICAST_QUERY_INTVL_MIN;
4546 }
4547
4548 brmctx->multicast_query_interval = intvl_jiffies;
4549}
4550
4551void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
4552 unsigned long val)
4553{
4554 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4555
4556 if (intvl_jiffies < BR_MULTICAST_STARTUP_QUERY_INTVL_MIN) {
4557 br_info(brmctx->br,
4558 "trying to set multicast startup query interval below minimum, setting to %lu (%ums)\n",
4559 jiffies_to_clock_t(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN),
4560 jiffies_to_msecs(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN));
4561 intvl_jiffies = BR_MULTICAST_STARTUP_QUERY_INTVL_MIN;
4562 }
4563
4564 brmctx->multicast_startup_query_interval = intvl_jiffies;
4565}
4566
4567/**
4568 * br_multicast_list_adjacent - Returns snooped multicast addresses
4569 * @dev: The bridge port adjacent to which to retrieve addresses
4570 * @br_ip_list: The list to store found, snooped multicast IP addresses in
4571 *
4572 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
4573 * snooping feature on all bridge ports of dev's bridge device, excluding
4574 * the addresses from dev itself.
4575 *
4576 * Returns the number of items added to br_ip_list.
4577 *
4578 * Notes:
4579 * - br_ip_list needs to be initialized by caller
4580 * - br_ip_list might contain duplicates in the end
4581 * (needs to be taken care of by caller)
4582 * - br_ip_list needs to be freed by caller
4583 */
4584int br_multicast_list_adjacent(struct net_device *dev,
4585 struct list_head *br_ip_list)
4586{
4587 struct net_bridge *br;
4588 struct net_bridge_port *port;
4589 struct net_bridge_port_group *group;
4590 struct br_ip_list *entry;
4591 int count = 0;
4592
4593 rcu_read_lock();
4594 if (!br_ip_list || !netif_is_bridge_port(dev))
4595 goto unlock;
4596
4597 port = br_port_get_rcu(dev);
4598 if (!port || !port->br)
4599 goto unlock;
4600
4601 br = port->br;
4602
4603 list_for_each_entry_rcu(port, &br->port_list, list) {
4604 if (!port->dev || port->dev == dev)
4605 continue;
4606
4607 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
4608 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
4609 if (!entry)
4610 goto unlock;
4611
4612 entry->addr = group->key.addr;
4613 list_add(&entry->list, br_ip_list);
4614 count++;
4615 }
4616 }
4617
4618unlock:
4619 rcu_read_unlock();
4620 return count;
4621}
4622EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
4623
4624/**
4625 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
4626 * @dev: The bridge port providing the bridge on which to check for a querier
4627 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4628 *
4629 * Checks whether the given interface has a bridge on top and if so returns
4630 * true if a valid querier exists anywhere on the bridged link layer.
4631 * Otherwise returns false.
4632 */
4633bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
4634{
4635 struct net_bridge *br;
4636 struct net_bridge_port *port;
4637 struct ethhdr eth;
4638 bool ret = false;
4639
4640 rcu_read_lock();
4641 if (!netif_is_bridge_port(dev))
4642 goto unlock;
4643
4644 port = br_port_get_rcu(dev);
4645 if (!port || !port->br)
4646 goto unlock;
4647
4648 br = port->br;
4649
4650 memset(ð, 0, sizeof(eth));
4651 eth.h_proto = htons(proto);
4652
4653 ret = br_multicast_querier_exists(&br->multicast_ctx, ð, NULL);
4654
4655unlock:
4656 rcu_read_unlock();
4657 return ret;
4658}
4659EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
4660
4661/**
4662 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
4663 * @dev: The bridge port adjacent to which to check for a querier
4664 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4665 *
4666 * Checks whether the given interface has a bridge on top and if so returns
4667 * true if a selected querier is behind one of the other ports of this
4668 * bridge. Otherwise returns false.
4669 */
4670bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
4671{
4672 struct net_bridge_mcast *brmctx;
4673 struct net_bridge *br;
4674 struct net_bridge_port *port;
4675 bool ret = false;
4676 int port_ifidx;
4677
4678 rcu_read_lock();
4679 if (!netif_is_bridge_port(dev))
4680 goto unlock;
4681
4682 port = br_port_get_rcu(dev);
4683 if (!port || !port->br)
4684 goto unlock;
4685
4686 br = port->br;
4687 brmctx = &br->multicast_ctx;
4688
4689 switch (proto) {
4690 case ETH_P_IP:
4691 port_ifidx = brmctx->ip4_querier.port_ifidx;
4692 if (!timer_pending(&brmctx->ip4_other_query.timer) ||
4693 port_ifidx == port->dev->ifindex)
4694 goto unlock;
4695 break;
4696#if IS_ENABLED(CONFIG_IPV6)
4697 case ETH_P_IPV6:
4698 port_ifidx = brmctx->ip6_querier.port_ifidx;
4699 if (!timer_pending(&brmctx->ip6_other_query.timer) ||
4700 port_ifidx == port->dev->ifindex)
4701 goto unlock;
4702 break;
4703#endif
4704 default:
4705 goto unlock;
4706 }
4707
4708 ret = true;
4709unlock:
4710 rcu_read_unlock();
4711 return ret;
4712}
4713EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
4714
4715/**
4716 * br_multicast_has_router_adjacent - Checks for a router behind a bridge port
4717 * @dev: The bridge port adjacent to which to check for a multicast router
4718 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4719 *
4720 * Checks whether the given interface has a bridge on top and if so returns
4721 * true if a multicast router is behind one of the other ports of this
4722 * bridge. Otherwise returns false.
4723 */
4724bool br_multicast_has_router_adjacent(struct net_device *dev, int proto)
4725{
4726 struct net_bridge_mcast_port *pmctx;
4727 struct net_bridge_mcast *brmctx;
4728 struct net_bridge_port *port;
4729 bool ret = false;
4730
4731 rcu_read_lock();
4732 port = br_port_get_check_rcu(dev);
4733 if (!port)
4734 goto unlock;
4735
4736 brmctx = &port->br->multicast_ctx;
4737 switch (proto) {
4738 case ETH_P_IP:
4739 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
4740 ip4_rlist) {
4741 if (pmctx->port == port)
4742 continue;
4743
4744 ret = true;
4745 goto unlock;
4746 }
4747 break;
4748#if IS_ENABLED(CONFIG_IPV6)
4749 case ETH_P_IPV6:
4750 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
4751 ip6_rlist) {
4752 if (pmctx->port == port)
4753 continue;
4754
4755 ret = true;
4756 goto unlock;
4757 }
4758 break;
4759#endif
4760 default:
4761 /* when compiled without IPv6 support, be conservative and
4762 * always assume presence of an IPv6 multicast router
4763 */
4764 ret = true;
4765 }
4766
4767unlock:
4768 rcu_read_unlock();
4769 return ret;
4770}
4771EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);
4772
4773static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
4774 const struct sk_buff *skb, u8 type, u8 dir)
4775{
4776 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
4777 __be16 proto = skb->protocol;
4778 unsigned int t_len;
4779
4780 u64_stats_update_begin(&pstats->syncp);
4781 switch (proto) {
4782 case htons(ETH_P_IP):
4783 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
4784 switch (type) {
4785 case IGMP_HOST_MEMBERSHIP_REPORT:
4786 pstats->mstats.igmp_v1reports[dir]++;
4787 break;
4788 case IGMPV2_HOST_MEMBERSHIP_REPORT:
4789 pstats->mstats.igmp_v2reports[dir]++;
4790 break;
4791 case IGMPV3_HOST_MEMBERSHIP_REPORT:
4792 pstats->mstats.igmp_v3reports[dir]++;
4793 break;
4794 case IGMP_HOST_MEMBERSHIP_QUERY:
4795 if (t_len != sizeof(struct igmphdr)) {
4796 pstats->mstats.igmp_v3queries[dir]++;
4797 } else {
4798 unsigned int offset = skb_transport_offset(skb);
4799 struct igmphdr *ih, _ihdr;
4800
4801 ih = skb_header_pointer(skb, offset,
4802 sizeof(_ihdr), &_ihdr);
4803 if (!ih)
4804 break;
4805 if (!ih->code)
4806 pstats->mstats.igmp_v1queries[dir]++;
4807 else
4808 pstats->mstats.igmp_v2queries[dir]++;
4809 }
4810 break;
4811 case IGMP_HOST_LEAVE_MESSAGE:
4812 pstats->mstats.igmp_leaves[dir]++;
4813 break;
4814 }
4815 break;
4816#if IS_ENABLED(CONFIG_IPV6)
4817 case htons(ETH_P_IPV6):
4818 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
4819 sizeof(struct ipv6hdr);
4820 t_len -= skb_network_header_len(skb);
4821 switch (type) {
4822 case ICMPV6_MGM_REPORT:
4823 pstats->mstats.mld_v1reports[dir]++;
4824 break;
4825 case ICMPV6_MLD2_REPORT:
4826 pstats->mstats.mld_v2reports[dir]++;
4827 break;
4828 case ICMPV6_MGM_QUERY:
4829 if (t_len != sizeof(struct mld_msg))
4830 pstats->mstats.mld_v2queries[dir]++;
4831 else
4832 pstats->mstats.mld_v1queries[dir]++;
4833 break;
4834 case ICMPV6_MGM_REDUCTION:
4835 pstats->mstats.mld_leaves[dir]++;
4836 break;
4837 }
4838 break;
4839#endif /* CONFIG_IPV6 */
4840 }
4841 u64_stats_update_end(&pstats->syncp);
4842}
4843
4844void br_multicast_count(struct net_bridge *br,
4845 const struct net_bridge_port *p,
4846 const struct sk_buff *skb, u8 type, u8 dir)
4847{
4848 struct bridge_mcast_stats __percpu *stats;
4849
4850 /* if multicast_disabled is true then igmp type can't be set */
4851 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
4852 return;
4853
4854 if (p)
4855 stats = p->mcast_stats;
4856 else
4857 stats = br->mcast_stats;
4858 if (WARN_ON(!stats))
4859 return;
4860
4861 br_mcast_stats_add(stats, skb, type, dir);
4862}
4863
4864int br_multicast_init_stats(struct net_bridge *br)
4865{
4866 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
4867 if (!br->mcast_stats)
4868 return -ENOMEM;
4869
4870 return 0;
4871}
4872
4873void br_multicast_uninit_stats(struct net_bridge *br)
4874{
4875 free_percpu(br->mcast_stats);
4876}
4877
4878/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
4879static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
4880{
4881 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
4882 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
4883}
4884
4885void br_multicast_get_stats(const struct net_bridge *br,
4886 const struct net_bridge_port *p,
4887 struct br_mcast_stats *dest)
4888{
4889 struct bridge_mcast_stats __percpu *stats;
4890 struct br_mcast_stats tdst;
4891 int i;
4892
4893 memset(dest, 0, sizeof(*dest));
4894 if (p)
4895 stats = p->mcast_stats;
4896 else
4897 stats = br->mcast_stats;
4898 if (WARN_ON(!stats))
4899 return;
4900
4901 memset(&tdst, 0, sizeof(tdst));
4902 for_each_possible_cpu(i) {
4903 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
4904 struct br_mcast_stats temp;
4905 unsigned int start;
4906
4907 do {
4908 start = u64_stats_fetch_begin(&cpu_stats->syncp);
4909 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
4910 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
4911
4912 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
4913 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
4914 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
4915 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
4916 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
4917 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
4918 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
4919 tdst.igmp_parse_errors += temp.igmp_parse_errors;
4920
4921 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
4922 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
4923 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
4924 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
4925 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
4926 tdst.mld_parse_errors += temp.mld_parse_errors;
4927 }
4928 memcpy(dest, &tdst, sizeof(*dest));
4929}
4930
4931int br_mdb_hash_init(struct net_bridge *br)
4932{
4933 int err;
4934
4935 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
4936 if (err)
4937 return err;
4938
4939 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
4940 if (err) {
4941 rhashtable_destroy(&br->sg_port_tbl);
4942 return err;
4943 }
4944
4945 return 0;
4946}
4947
4948void br_mdb_hash_fini(struct net_bridge *br)
4949{
4950 rhashtable_destroy(&br->sg_port_tbl);
4951 rhashtable_destroy(&br->mdb_hash_tbl);
4952}