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[thirdparty/kernel/stable.git] / net / bridge / br_multicast.c
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2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
eb1d1641
HX		 2/*
3 * Bridge multicast support.
4 *
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
eb1d1641
HX		 6 */
7
8#include <linux/err.h>
07f8ac4a 9#include <linux/export.h>
eb1d1641
HX		 10#include <linux/if_ether.h>
11#include <linux/igmp.h>
4b3087c7 12#include <linux/in.h>
eb1d1641
HX		 13#include <linux/jhash.h>
14#include <linux/kernel.h>
b195167f 15#include <linux/log2.h>
eb1d1641
HX		 16#include <linux/netdevice.h>
17#include <linux/netfilter_bridge.h>
18#include <linux/random.h>
19#include <linux/rculist.h>
20#include <linux/skbuff.h>
21#include <linux/slab.h>
22#include <linux/timer.h>
1c8ad5bf 23#include <linux/inetdevice.h>
91b02d3d 24#include <linux/mroute.h>
eb1d1641 25#include <net/ip.h>
147c1e9b 26#include <net/switchdev.h>
dfd56b8b 27#if IS_ENABLED(CONFIG_IPV6)
4b3087c7 28#include <linux/icmpv6.h>
08b202b6
YH		 29#include <net/ipv6.h>
30#include <net/mld.h>
d4c4f07d 31#include <net/ip6_checksum.h>
3c3769e6 32#include <net/addrconf.h>
08b202b6 33#endif
eb1d1641
HX		 34
35#include "br_private.h"
8f07b831 36#include "br_private_mcast_eht.h"
eb1d1641 37
19e3a9c9
NA		 38static const struct rhashtable_params br_mdb_rht_params = {
39 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
40 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
41 .key_len = sizeof(struct br_ip),
42 .automatic_shrinking = true,
19e3a9c9
NA		 43};
44
085b53c8
NA		 45static const struct rhashtable_params br_sg_port_rht_params = {
46 .head_offset = offsetof(struct net_bridge_port_group, rhnode),
47 .key_offset = offsetof(struct net_bridge_port_group, key),
48 .key_len = sizeof(struct net_bridge_port_group_sg_key),
49 .automatic_shrinking = true,
50};
51
adc47037 52static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
90010b36 53 struct bridge_mcast_own_query *query);
adc47037
NA		 54static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
55 struct net_bridge_mcast_port *pmctx);
56static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
57 struct net_bridge_mcast_port *pmctx,
bc8c20ac 58 __be32 group,
6db6f0ea
FF		 59 __u16 vid,
60 const unsigned char *src);
42c11ccf 61static void br_multicast_port_group_rexmit(struct timer_list *t);
6db6f0ea 62
ed2d3597 63static void
adc47037
NA		 64br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted);
65static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
66 struct net_bridge_mcast_port *pmctx);
30515832 67#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 68static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
69 struct net_bridge_mcast_port *pmctx,
bc8c20ac 70 const struct in6_addr *group,
6db6f0ea 71 __u16 vid, const unsigned char *src);
bc8c20ac 72#endif
b0812368 73static struct net_bridge_port_group *
adc47037
NA		 74__br_multicast_add_group(struct net_bridge_mcast *brmctx,
75 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 76 struct br_ip *group,
77 const unsigned char *src,
78 u8 filter_mode,
9116ffbf
NA		 79 bool igmpv2_mldv1,
80 bool blocked);
8266a049
NA		 81static void br_multicast_find_del_pg(struct net_bridge *br,
82 struct net_bridge_port_group *pg);
613d61db 83static void __br_multicast_stop(struct net_bridge_mcast *brmctx);
c83b8fab 84
c832962a
OM		 85static int br_mc_disabled_update(struct net_device *dev, bool value,
86 struct netlink_ext_ack *extack);
87
085b53c8
NA		 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
19e3a9c9
NA		 98static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
99 struct br_ip *dst)
08b202b6 100{
19e3a9c9 101 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 102}
08b202b6 103
19e3a9c9
NA		 104struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
105 struct br_ip *dst)
eb1d1641 106{
19e3a9c9 107 struct net_bridge_mdb_entry *ent;
eb1d1641 108
19e3a9c9 109 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 110
19e3a9c9
NA		 111 rcu_read_lock();
112 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
113 rcu_read_unlock();
7f285fa7 114
19e3a9c9 115 return ent;
7f285fa7
HX		 116}
117
19e3a9c9
NA		 118static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
119 __be32 dst, __u16 vid)
eb1d1641 120{
8ef2a9a5
YH		 121 struct br_ip br_dst;
122
19e3a9c9 123 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 124 br_dst.dst.ip4 = dst;
8ef2a9a5 125 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 126 br_dst.vid = vid;
0821ec55 127
19e3a9c9 128 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 129}
130
dfd56b8b 131#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 132static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
133 const struct in6_addr *dst,
134 __u16 vid)
08b202b6
YH		 135{
136 struct br_ip br_dst;
0821ec55 137
19e3a9c9 138 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 139 br_dst.dst.ip6 = *dst;
08b202b6 140 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 141 br_dst.vid = vid;
08b202b6 142
19e3a9c9 143 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 144}
145#endif
146
adc47037 147struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
fbca58a2 148 struct sk_buff *skb, u16 vid)
eb1d1641 149{
adc47037 150 struct net_bridge *br = brmctx->br;
8ef2a9a5
YH		 151 struct br_ip ip;
152
4cdd0d10
NA		 153 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
154 br_multicast_ctx_vlan_global_disabled(brmctx))
eb1d1641
HX		 155 return NULL;
156
8ef2a9a5 157 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 158 return NULL;
159
19e3a9c9 160 memset(&ip, 0, sizeof(ip));
8ef2a9a5 161 ip.proto = skb->protocol;
fbca58a2 162 ip.vid = vid;
8ef2a9a5 163
eb1d1641
HX		 164 switch (skb->protocol) {
165 case htons(ETH_P_IP):
eab3227b 166 ip.dst.ip4 = ip_hdr(skb)->daddr;
adc47037 167 if (brmctx->multicast_igmp_version == 3) {
7d07a68c
NA		 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 }
8ef2a9a5 176 break;
dfd56b8b 177#if IS_ENABLED(CONFIG_IPV6)
08b202b6 178 case htons(ETH_P_IPV6):
eab3227b 179 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
adc47037 180 if (brmctx->multicast_mld_version == 2) {
7d07a68c
NA		 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 }
08b202b6
YH		 189 break;
190#endif
8ef2a9a5 191 default:
955062b0
NA		 192 ip.proto = 0;
193 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
eb1d1641
HX		 194 }
195
19e3a9c9 196 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 197}
198
74edfd48
NA		 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();
3f0d14ef 227 vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid);
74edfd48
NA		 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
4cdd0d10
NA		 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
b0812368
NA		 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
adc47037
NA		 268static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx,
269 struct net_bridge_port_group *pg,
8266a049
NA		 270 struct br_ip *sg_ip)
271{
272 struct net_bridge_port_group_sg_key sg_key;
8266a049 273 struct net_bridge_port_group *src_pg;
adc47037 274 struct net_bridge_mcast *brmctx;
8266a049
NA		 275
276 memset(&sg_key, 0, sizeof(sg_key));
7b54aaaf 277 brmctx = br_multicast_port_ctx_get_global(pmctx);
8266a049
NA		 278 sg_key.port = pg->key.port;
279 sg_key.addr = *sg_ip;
adc47037 280 if (br_sg_port_find(brmctx->br, &sg_key))
8266a049
NA		 281 return;
282
adc47037
NA		 283 src_pg = __br_multicast_add_group(brmctx, pmctx,
284 sg_ip, pg->eth_addr,
9116ffbf 285 MCAST_INCLUDE, false, false);
8266a049
NA		 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;
adc47037 324 struct net_bridge_mcast_port *pmctx;
8266a049
NA		 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;
eb1593a0
NA		 334 pmctx = br_multicast_pg_to_port_ctx(pg);
335 if (!pmctx)
336 return;
8266a049
NA		 337
338 memset(&sg_ip, 0, sizeof(sg_ip));
339 sg_ip = pg->key.addr;
7b54aaaf 340
8266a049
NA		 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:
adc47037 357 __fwd_add_star_excl(pmctx, pg, &sg_ip);
8266a049
NA		 358 break;
359 }
360 }
361 }
362}
363
094b82fd
NA		 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
8266a049
NA		 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
094b82fd
NA		 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
8266a049
NA		 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;
adc47037 450 struct net_bridge_mcast_port *pmctx;
8266a049 451 struct net_bridge_port_group *pg;
adc47037 452 struct net_bridge_mcast *brmctx;
8266a049
NA		 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
094b82fd 459 br_multicast_sg_host_state(star_mp, sg);
8266a049
NA		 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
eb1593a0
NA		 475 pmctx = br_multicast_pg_to_port_ctx(pg);
476 if (!pmctx)
477 continue;
478 brmctx = br_multicast_port_ctx_get_global(pmctx);
479
adc47037 480 src_pg = __br_multicast_add_group(brmctx, pmctx,
8266a049
NA		 481 &sg->key.addr,
482 sg->eth_addr,
9116ffbf 483 MCAST_INCLUDE, false, false);
8266a049
NA		 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
b0812368
NA		 491static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
492{
8266a049 493 struct net_bridge_mdb_entry *star_mp;
adc47037 494 struct net_bridge_mcast_port *pmctx;
b0812368 495 struct net_bridge_port_group *sg;
adc47037 496 struct net_bridge_mcast *brmctx;
b0812368
NA		 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));
eb1593a0
NA		 503 pmctx = br_multicast_pg_to_port_ctx(src->pg);
504 if (!pmctx)
505 return;
7b54aaaf 506 brmctx = br_multicast_port_ctx_get_global(pmctx);
b0812368
NA		 507 sg_ip = src->pg->key.addr;
508 sg_ip.src = src->addr.src;
adc47037
NA		 509
510 sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip,
9116ffbf
NA		 511 src->pg->eth_addr, MCAST_INCLUDE, false,
512 !timer_pending(&src->timer));
b0812368
NA		 513 if (IS_ERR_OR_NULL(sg))
514 return;
515 src->flags |= BR_SGRP_F_INSTALLED;
8266a049 516 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
b0812368
NA		 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);
8266a049
NA		 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);
b0812368
NA		 530}
531
d5a10222
NA		 532static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
533 bool fastleave)
b0812368
NA		 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 &&
a01ecb17
IS		 555 (p->flags & MDB_PG_FLAGS_PERMANENT) &&
556 !(src->flags & BR_SGRP_F_USER_ADDED))
b0812368
NA		 557 break;
558
d5a10222
NA		 559 if (fastleave)
560 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
b0812368
NA		 561 br_multicast_del_pg(mp, p, pp);
562 break;
563 }
564 src->flags &= ~BR_SGRP_F_INSTALLED;
565}
566
9116ffbf 567/* install S,G and based on src's timer enable or disable forwarding */
b0812368
NA		 568static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
569{
9116ffbf
NA		 570 struct net_bridge_port_group_sg_key sg_key;
571 struct net_bridge_port_group *sg;
572 u8 old_flags;
573
b0812368 574 br_multicast_fwd_src_add(src);
9116ffbf
NA		 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 }
b0812368
NA		 599}
600
e12cec65
NA		 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
292a089d 609 timer_shutdown_sync(&mp->timer);
e12cec65
NA		 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
88c1f37f 624static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 625{
88c1f37f 626 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 627 struct net_bridge *br = mp->br;
eb1d1641
HX		 628
629 spin_lock(&br->multicast_lock);
b0812368
NA		 630 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
631 timer_pending(&mp->timer))
eb1d1641
HX		 632 goto out;
633
1bc844ee 634 br_multicast_host_leave(mp, true);
eb1d1641
HX		 635
636 if (mp->ports)
637 goto out;
e12cec65
NA		 638 br_multicast_del_mdb_entry(mp);
639out:
640 spin_unlock(&br->multicast_lock);
641}
eb1d1641 642
e12cec65
NA		 643static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
644{
645 struct net_bridge_group_src *src;
eb1d1641 646
e12cec65
NA		 647 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
648 WARN_ON(!hlist_unhashed(&src->node));
eb1d1641 649
292a089d 650 timer_shutdown_sync(&src->timer);
e12cec65 651 kfree_rcu(src, rcu);
eb1d1641
HX		 652}
653
083e3534 654void __br_multicast_del_group_src(struct net_bridge_group_src *src)
8b671779 655{
085b53c8 656 struct net_bridge *br = src->pg->key.port->br;
8b671779
NA		 657
658 hlist_del_init_rcu(&src->node);
659 src->pg->src_ents--;
e12cec65
NA		 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
083e3534
IS		 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
e12cec65
NA		 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
292a089d
SRG		 679 timer_shutdown_sync(&pg->rexmit_timer);
680 timer_shutdown_sync(&pg->timer);
e12cec65 681 kfree_rcu(pg, rcu);
8b671779
NA		 682}
683
681590bd
NA		 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{
085b53c8 688 struct net_bridge *br = pg->key.port->br;
8b671779
NA		 689 struct net_bridge_group_src *ent;
690 struct hlist_node *tmp;
681590bd
NA		 691
692 rcu_assign_pointer(*pp, pg->next);
693 hlist_del_init(&pg->mglist);
baa74d39 694 br_multicast_eht_clean_sets(pg);
8b671779 695 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
d5a10222 696 br_multicast_del_group_src(ent, false);
81f19838 697 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
74705582
NA		 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);
8266a049 701 br_multicast_sg_del_exclude_ports(mp);
74705582 702 } else {
8266a049 703 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
74705582 704 }
e12cec65
NA		 705 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
706 queue_work(system_long_wq, &br->mcast_gc_work);
681590bd
NA		 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)
eb1d1641 714{
8b671779 715 struct net_bridge_port_group __rcu **pp;
eb1d1641
HX		 716 struct net_bridge_mdb_entry *mp;
717 struct net_bridge_port_group *p;
e8051688 718
085b53c8 719 mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641
HX		 720 if (WARN_ON(!mp))
721 return;
722
e8051688
ED		 723 for (pp = &mp->ports;
724 (p = mlock_dereference(*pp, br)) != NULL;
725 pp = &p->next) {
eb1d1641
HX		 726 if (p != pg)
727 continue;
728
681590bd 729 br_multicast_del_pg(mp, pg, pp);
eb1d1641
HX		 730 return;
731 }
732
733 WARN_ON(1);
734}
735
88c1f37f 736static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 737{
88c1f37f 738 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
d6c33d67 739 struct net_bridge_group_src *src_ent;
085b53c8 740 struct net_bridge *br = pg->key.port->br;
d6c33d67
NA		 741 struct hlist_node *tmp;
742 bool changed;
eb1d1641
HX		 743
744 spin_lock(&br->multicast_lock);
745 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 746 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 747 goto out;
748
d6c33d67
NA		 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)) {
d5a10222 753 br_multicast_del_group_src(src_ent, false);
d6c33d67
NA		 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) {
085b53c8 761 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641 762
8266a049
NA		 763 if (changed && br_multicast_is_star_g(&pg->key.addr))
764 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
765
d6c33d67
NA		 766 if (WARN_ON(!mp))
767 goto out;
768 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
769 }
eb1d1641
HX		 770out:
771 spin_unlock(&br->multicast_lock);
772}
773
e12cec65
NA		 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
615cc23e
NA		 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
adc47037 805static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx,
615cc23e 806 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 807 struct net_bridge_port_group *pg,
808 __be32 ip_dst, __be32 group,
809 bool with_srcs, bool over_lmqt,
42c11ccf
NA		 810 u8 sflag, u8 *igmp_type,
811 bool *need_rexmit)
eb1d1641 812{
085b53c8 813 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 814 struct net_bridge_group_src *ent;
815 size_t pkt_size, igmp_hdr_size;
816 unsigned long now = jiffies;
5e923585 817 struct igmpv3_query *ihv3;
438ef2d0
NA		 818 void *csum_start = NULL;
819 __sum16 *csum = NULL;
eb1d1641
HX		 820 struct sk_buff *skb;
821 struct igmphdr *ih;
822 struct ethhdr *eth;
438ef2d0 823 unsigned long lmqt;
eb1d1641 824 struct iphdr *iph;
438ef2d0 825 u16 lmqt_srcs = 0;
eb1d1641 826
5e923585 827 igmp_hdr_size = sizeof(*ih);
d3d065c0 828 if (brmctx->multicast_igmp_version == 3) {
5e923585 829 igmp_hdr_size = sizeof(*ihv3);
438ef2d0 830 if (pg && with_srcs) {
d3d065c0
NA		 831 lmqt = now + (brmctx->multicast_last_member_interval *
832 brmctx->multicast_last_member_count);
438ef2d0
NA		 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) ||
adc47037 848 pkt_size > brmctx->br->dev->mtu)
438ef2d0
NA		 849 return NULL;
850
adc47037 851 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
eb1d1641
HX		 852 if (!skb)
853 goto out;
854
615cc23e 855 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
eb1d1641
HX		 856 skb->protocol = htons(ETH_P_IP);
857
858 skb_reset_mac_header(skb);
859 eth = eth_hdr(skb);
860
adc47037 861 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
438ef2d0 862 ip_eth_mc_map(ip_dst, eth->h_dest);
eb1d1641
HX		 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);
438ef2d0 868 iph->tot_len = htons(pkt_size - sizeof(*eth));
eb1d1641
HX		 869
870 iph->version = 4;
871 iph->ihl = 6;
872 iph->tos = 0xc0;
eb1d1641
HX		 873 iph->id = 0;
874 iph->frag_off = htons(IP_DF);
875 iph->ttl = 1;
876 iph->protocol = IPPROTO_IGMP;
adc47037
NA		 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;
438ef2d0 879 iph->daddr = ip_dst;
eb1d1641
HX		 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);
1080ab95 888 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 889
d3d065c0 890 switch (brmctx->multicast_igmp_version) {
5e923585
NA		 891 case 2:
892 ih = igmp_hdr(skb);
893 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
d3d065c0
NA		 894 ih->code = (group ? brmctx->multicast_last_member_interval :
895 brmctx->multicast_query_response_interval) /
5e923585
NA		 896 (HZ / IGMP_TIMER_SCALE);
897 ih->group = group;
898 ih->csum = 0;
438ef2d0
NA		 899 csum = &ih->csum;
900 csum_start = (void *)ih;
5e923585
NA		 901 break;
902 case 3:
903 ihv3 = igmpv3_query_hdr(skb);
904 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
d3d065c0
NA		 905 ihv3->code = (group ? brmctx->multicast_last_member_interval :
906 brmctx->multicast_query_response_interval) /
5e923585
NA		 907 (HZ / IGMP_TIMER_SCALE);
908 ihv3->group = group;
d3d065c0 909 ihv3->qqic = brmctx->multicast_query_interval / HZ;
438ef2d0 910 ihv3->nsrcs = htons(lmqt_srcs);
5e923585 911 ihv3->resv = 0;
438ef2d0 912 ihv3->suppress = sflag;
5e923585
NA		 913 ihv3->qrv = 2;
914 ihv3->csum = 0;
438ef2d0
NA		 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) {
deb96566 925 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
438ef2d0 926 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 927 if (need_rexmit && ent->src_query_rexmit_cnt)
928 *need_rexmit = true;
438ef2d0
NA		 929 }
930 }
931 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
932 kfree_skb(skb);
933 return NULL;
934 }
5e923585
NA		 935 break;
936 }
937
438ef2d0
NA		 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);
5e923585 944 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 945 __skb_pull(skb, sizeof(*eth));
946
947out:
948 return skb;
949}
950
dfd56b8b 951#if IS_ENABLED(CONFIG_IPV6)
adc47037 952static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx,
615cc23e 953 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 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,
42c11ccf
NA		 958 u8 sflag, u8 *igmp_type,
959 bool *need_rexmit)
08b202b6 960{
085b53c8 961 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 962 struct net_bridge_group_src *ent;
963 size_t pkt_size, mld_hdr_size;
964 unsigned long now = jiffies;
aa2ae3e7 965 struct mld2_query *mld2q;
438ef2d0 966 void *csum_start = NULL;
aa2ae3e7 967 unsigned long interval;
438ef2d0 968 __sum16 *csum = NULL;
08b202b6
YH		 969 struct ipv6hdr *ip6h;
970 struct mld_msg *mldq;
aa2ae3e7 971 struct sk_buff *skb;
438ef2d0 972 unsigned long llqt;
08b202b6 973 struct ethhdr *eth;
438ef2d0 974 u16 llqt_srcs = 0;
08b202b6 975 u8 *hopopt;
08b202b6 976
aa2ae3e7 977 mld_hdr_size = sizeof(*mldq);
d3d065c0 978 if (brmctx->multicast_mld_version == 2) {
aa2ae3e7 979 mld_hdr_size = sizeof(*mld2q);
438ef2d0 980 if (pg && with_srcs) {
d3d065c0
NA		 981 llqt = now + (brmctx->multicast_last_member_interval *
982 brmctx->multicast_last_member_count);
438ef2d0
NA		 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) ||
adc47037 998 pkt_size > brmctx->br->dev->mtu)
438ef2d0
NA		 999 return NULL;
1000
adc47037 1001 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
08b202b6
YH		 1002 if (!skb)
1003 goto out;
1004
615cc23e 1005 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
08b202b6
YH		 1006 skb->protocol = htons(ETH_P_IPV6);
1007
1008 /* Ethernet header */
1009 skb_reset_mac_header(skb);
1010 eth = eth_hdr(skb);
1011
adc47037 1012 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
08b202b6
YH		 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);
aa2ae3e7 1021 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 1022 ip6h->nexthdr = IPPROTO_HOPOPTS;
1023 ip6h->hop_limit = 1;
438ef2d0 1024 ip6h->daddr = *ip6_dst;
adc47037
NA		 1025 if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev,
1026 &ip6h->daddr, 0, &ip6h->saddr)) {
d1d81d4c 1027 kfree_skb(skb);
adc47037 1028 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 1029 return NULL;
1030 }
0888d5f3 1031
adc47037 1032 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 1033 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 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;
1de5a71c
EZ		 1042 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
1043 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 1044
1045 skb_put(skb, sizeof(*ip6h) + 8);
1046
1047 /* ICMPv6 */
1048 skb_set_transport_header(skb, skb->len);
438ef2d0 1049 interval = ipv6_addr_any(group) ?
d3d065c0
NA		 1050 brmctx->multicast_query_response_interval :
1051 brmctx->multicast_last_member_interval;
1080ab95 1052 *igmp_type = ICMPV6_MGM_QUERY;
d3d065c0 1053 switch (brmctx->multicast_mld_version) {
aa2ae3e7
NA		 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;
438ef2d0
NA		 1061 mldq->mld_mca = *group;
1062 csum = &mldq->mld_cksum;
1063 csum_start = (void *)mldq;
aa2ae3e7
NA		 1064 break;
1065 case 2:
1066 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 1067 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 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;
438ef2d0 1073 mld2q->mld2q_suppress = sflag;
aa2ae3e7 1074 mld2q->mld2q_qrv = 2;
438ef2d0 1075 mld2q->mld2q_nsrcs = htons(llqt_srcs);
d3d065c0 1076 mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ;
438ef2d0
NA		 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) {
deb96566 1088 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
438ef2d0 1089 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 1090 if (need_rexmit && ent->src_query_rexmit_cnt)
1091 *need_rexmit = true;
438ef2d0
NA		 1092 }
1093 }
1094 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
1095 kfree_skb(skb);
1096 return NULL;
1097 }
aa2ae3e7
NA		 1098 break;
1099 }
08b202b6 1100
438ef2d0
NA		 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);
08b202b6
YH		 1110 __skb_pull(skb, sizeof(*eth));
1111
1112out:
1113 return skb;
1114}
1115#endif
1116
adc47037 1117static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx,
615cc23e 1118 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 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,
42c11ccf
NA		 1123 u8 sflag, u8 *igmp_type,
1124 bool *need_rexmit)
8ef2a9a5 1125{
438ef2d0
NA		 1126 __be32 ip4_dst;
1127
1128 switch (group->proto) {
8ef2a9a5 1129 case htons(ETH_P_IP):
eab3227b 1130 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
615cc23e 1131 return br_ip4_multicast_alloc_query(brmctx, pmctx, pg,
eab3227b 1132 ip4_dst, group->dst.ip4,
438ef2d0 1133 with_srcs, over_lmqt,
42c11ccf
NA		 1134 sflag, igmp_type,
1135 need_rexmit);
dfd56b8b 1136#if IS_ENABLED(CONFIG_IPV6)
438ef2d0
NA		 1137 case htons(ETH_P_IPV6): {
1138 struct in6_addr ip6_dst;
1139
1140 if (ip_dst)
eab3227b 1141 ip6_dst = ip_dst->dst.ip6;
438ef2d0
NA		 1142 else
1143 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1144 htonl(1));
1145
615cc23e 1146 return br_ip6_multicast_alloc_query(brmctx, pmctx, pg,
eab3227b 1147 &ip6_dst, &group->dst.ip6,
438ef2d0 1148 with_srcs, over_lmqt,
42c11ccf
NA		 1149 sflag, igmp_type,
1150 need_rexmit);
438ef2d0 1151 }
08b202b6 1152#endif
8ef2a9a5
YH		 1153 }
1154 return NULL;
1155}
1156
cfd56754 1157struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 1158 struct br_ip *group)
eb1d1641 1159{
eb1d1641 1160 struct net_bridge_mdb_entry *mp;
4c0833bc 1161 int err;
eb1d1641 1162
19e3a9c9
NA		 1163 mp = br_mdb_ip_get(br, group);
1164 if (mp)
1165 return mp;
eb1d1641 1166
19e3a9c9 1167 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
c832962a 1168 br_mc_disabled_update(br->dev, false, NULL);
19e3a9c9
NA		 1169 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1170 return ERR_PTR(-E2BIG);
eb1d1641
HX		 1171 }
1172
1173 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1174 if (unlikely(!mp))
4c0833bc 1175 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 1176
1177 mp->br = br;
8ef2a9a5 1178 mp->addr = *group;
e12cec65 1179 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
88c1f37f 1180 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 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 }
1faabf2a 1189
eb1d1641
HX		 1190 return mp;
1191}
1192
8b671779
NA		 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) {
d5a10222 1206 br_multicast_del_group_src(src, false);
8b671779
NA		 1207 if (!hlist_empty(&pg->src_list))
1208 goto out;
1209 br_multicast_find_del_pg(br, pg);
9116ffbf
NA		 1210 } else {
1211 br_multicast_fwd_src_handle(src);
8b671779 1212 }
9116ffbf 1213
8b671779
NA		 1214out:
1215 spin_unlock(&br->multicast_lock);
1216}
1217
474ddb37 1218struct net_bridge_group_src *
8b671779
NA		 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)
deb96566 1226 if (ip->src.ip4 == ent->addr.src.ip4)
8b671779
NA		 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)
deb96566 1232 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
8b671779
NA		 1233 return ent;
1234 break;
1235#endif
1236 }
1237
1238 return NULL;
1239}
1240
fd0c6961 1241struct net_bridge_group_src *
8b671779
NA		 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):
deb96566
NA		 1251 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1252 ipv4_is_multicast(src_ip->src.ip4))
8b671779
NA		 1253 return NULL;
1254 break;
1255#if IS_ENABLED(CONFIG_IPV6)
1256 case htons(ETH_P_IPV6):
deb96566
NA		 1257 if (ipv6_addr_any(&src_ip->src.ip6) ||
1258 ipv6_addr_is_multicast(&src_ip->src.ip6))
8b671779
NA		 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;
085b53c8 1269 grp_src->br = pg->key.port->br;
8b671779 1270 grp_src->addr = *src_ip;
e12cec65 1271 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
8b671779
NA		 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
cfd56754
CW		 1280struct net_bridge_port_group *br_multicast_new_port_group(
1281 struct net_bridge_port *port,
f86c3e2c 1282 const struct br_ip *group,
ccb1c31a 1283 struct net_bridge_port_group __rcu *next,
6db6f0ea 1284 unsigned char flags,
8b671779 1285 const unsigned char *src,
8f8cb77e
NA		 1286 u8 filter_mode,
1287 u8 rt_protocol)
cfd56754
CW		 1288{
1289 struct net_bridge_port_group *p;
1290
1291 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1292 if (unlikely(!p))
1293 return NULL;
1294
085b53c8
NA		 1295 p->key.addr = *group;
1296 p->key.port = port;
9d06b6d8 1297 p->flags = flags;
8b671779 1298 p->filter_mode = filter_mode;
8f8cb77e 1299 p->rt_protocol = rt_protocol;
5b163288 1300 p->eht_host_tree = RB_ROOT;
baa74d39 1301 p->eht_set_tree = RB_ROOT;
e12cec65 1302 p->mcast_gc.destroy = br_multicast_destroy_port_group;
8b671779 1303 INIT_HLIST_HEAD(&p->src_list);
085b53c8
NA		 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
eca2a43b 1312 rcu_assign_pointer(p->next, next);
88c1f37f 1313 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
42c11ccf
NA		 1314 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1315 hlist_add_head(&p->mglist, &port->mglist);
6db6f0ea
FF		 1316
1317 if (src)
1318 memcpy(p->eth_addr, src, ETH_ALEN);
1319 else
1bfe45f4 1320 eth_broadcast_addr(p->eth_addr);
6db6f0ea 1321
cfd56754
CW		 1322 return p;
1323}
1324
58d913a3
NA		 1325void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1326 struct net_bridge_mdb_entry *mp, bool notify)
1bc844ee
NA		 1327{
1328 if (!mp->host_joined) {
1329 mp->host_joined = true;
094b82fd
NA		 1330 if (br_multicast_is_star_g(&mp->addr))
1331 br_multicast_star_g_host_state(mp);
1bc844ee 1332 if (notify)
81f19838 1333 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1bc844ee 1334 }
955062b0
NA		 1335
1336 if (br_group_is_l2(&mp->addr))
1337 return;
1338
58d913a3 1339 mod_timer(&mp->timer, jiffies + brmctx->multicast_membership_interval);
1bc844ee
NA		 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;
094b82fd
NA		 1348 if (br_multicast_is_star_g(&mp->addr))
1349 br_multicast_star_g_host_state(mp);
1bc844ee 1350 if (notify)
81f19838 1351 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1bc844ee
NA		 1352}
1353
b0812368 1354static struct net_bridge_port_group *
adc47037
NA		 1355__br_multicast_add_group(struct net_bridge_mcast *brmctx,
1356 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 1357 struct br_ip *group,
1358 const unsigned char *src,
1359 u8 filter_mode,
9116ffbf
NA		 1360 bool igmpv2_mldv1,
1361 bool blocked)
eb1d1641 1362{
e8051688 1363 struct net_bridge_port_group __rcu **pp;
b0812368 1364 struct net_bridge_port_group *p = NULL;
5e923585 1365 struct net_bridge_mdb_entry *mp;
454594f3 1366 unsigned long now = jiffies;
eb1d1641 1367
4cdd0d10 1368 if (!br_multicast_ctx_should_use(brmctx, pmctx))
eb1d1641
HX		 1369 goto out;
1370
adc47037 1371 mp = br_multicast_new_group(brmctx->br, group);
4c0833bc 1372 if (IS_ERR(mp))
1697291d 1373 return ERR_CAST(mp);
eb1d1641 1374
adc47037 1375 if (!pmctx) {
58d913a3 1376 br_multicast_host_join(brmctx, mp, true);
eb1d1641
HX		 1377 goto out;
1378 }
1379
e8051688 1380 for (pp = &mp->ports;
adc47037 1381 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 1382 pp = &p->next) {
adc47037 1383 if (br_port_group_equal(p, pmctx->port, src))
454594f3 1384 goto found;
adc47037 1385 if ((unsigned long)p->key.port < (unsigned long)pmctx->port)
eb1d1641
HX		 1386 break;
1387 }
1388
adc47037 1389 p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src,
955062b0 1390 filter_mode, RTPROT_KERNEL);
b0812368
NA		 1391 if (unlikely(!p)) {
1392 p = ERR_PTR(-ENOMEM);
1393 goto out;
1394 }
eb1d1641 1395 rcu_assign_pointer(*pp, p);
9116ffbf
NA		 1396 if (blocked)
1397 p->flags |= MDB_PG_FLAGS_BLOCKED;
adc47037 1398 br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB);
eb1d1641 1399
454594f3 1400found:
0436862e 1401 if (igmpv2_mldv1)
d3d065c0 1402 mod_timer(&p->timer,
adc47037 1403 now + brmctx->multicast_membership_interval);
81f19838 1404
eb1d1641 1405out:
b0812368
NA		 1406 return p;
1407}
1408
adc47037
NA		 1409static int br_multicast_add_group(struct net_bridge_mcast *brmctx,
1410 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 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;
eb1d1641 1418
adc47037
NA		 1419 spin_lock(&brmctx->br->multicast_lock);
1420 pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode,
9116ffbf 1421 igmpv2_mldv1, false);
b0812368 1422 /* NULL is considered valid for host joined groups */
8d21c882 1423 err = PTR_ERR_OR_ZERO(pg);
adc47037 1424 spin_unlock(&brmctx->br->multicast_lock);
b0812368 1425
eb1d1641
HX		 1426 return err;
1427}
1428
adc47037
NA		 1429static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx,
1430 struct net_bridge_mcast_port *pmctx,
b0e9a30d 1431 __be32 group,
6db6f0ea 1432 __u16 vid,
8b671779
NA		 1433 const unsigned char *src,
1434 bool igmpv2)
8ef2a9a5
YH		 1435{
1436 struct br_ip br_group;
8b671779 1437 u8 filter_mode;
8ef2a9a5
YH		 1438
1439 if (ipv4_is_local_multicast(group))
1440 return 0;
1441
1515a63f 1442 memset(&br_group, 0, sizeof(br_group));
eab3227b 1443 br_group.dst.ip4 = group;
8ef2a9a5 1444 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1445 br_group.vid = vid;
8b671779 1446 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
8ef2a9a5 1447
adc47037
NA		 1448 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1449 filter_mode, igmpv2);
8ef2a9a5
YH		 1450}
1451
dfd56b8b 1452#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 1453static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx,
1454 struct net_bridge_mcast_port *pmctx,
b0e9a30d 1455 const struct in6_addr *group,
6db6f0ea 1456 __u16 vid,
8b671779
NA		 1457 const unsigned char *src,
1458 bool mldv1)
08b202b6
YH		 1459{
1460 struct br_ip br_group;
8b671779 1461 u8 filter_mode;
08b202b6 1462
3c3769e6 1463 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1464 return 0;
1465
19e3a9c9 1466 memset(&br_group, 0, sizeof(br_group));
eab3227b 1467 br_group.dst.ip6 = *group;
9cc6e0c4 1468 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1469 br_group.vid = vid;
8b671779 1470 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
08b202b6 1471
adc47037
NA		 1472 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1473 filter_mode, mldv1);
08b202b6
YH		 1474}
1475#endif
1476
ed2d3597
LL		 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
adc47037 1486static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
ed2d3597 1487{
adc47037 1488 return br_multicast_rport_del(&pmctx->ip4_rlist);
ed2d3597
LL		 1489}
1490
adc47037 1491static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 1492{
1493#if IS_ENABLED(CONFIG_IPV6)
adc47037 1494 return br_multicast_rport_del(&pmctx->ip6_rlist);
a3c02e76
LL		 1495#else
1496 return false;
1497#endif
1498}
1499
9632233e 1500static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx,
ee5fb222
LL		 1501 struct timer_list *t,
1502 struct hlist_node *rlist)
eb1d1641 1503{
9632233e 1504 struct net_bridge *br = pmctx->port->br;
ed2d3597 1505 bool del;
eb1d1641
HX		 1506
1507 spin_lock(&br->multicast_lock);
9632233e
NA		 1508 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1509 pmctx->multicast_router == MDB_RTR_TYPE_PERM ||
ee5fb222 1510 timer_pending(t))
eb1d1641
HX		 1511 goto out;
1512
ed2d3597 1513 del = br_multicast_rport_del(rlist);
adc47037 1514 br_multicast_rport_del_notify(pmctx, del);
eb1d1641
HX		 1515out:
1516 spin_unlock(&br->multicast_lock);
1517}
1518
ee5fb222
LL		 1519static void br_ip4_multicast_router_expired(struct timer_list *t)
1520{
9632233e
NA		 1521 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1522 ip4_mc_router_timer);
ee5fb222 1523
9632233e 1524 br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist);
ee5fb222
LL		 1525}
1526
a3c02e76
LL		 1527#if IS_ENABLED(CONFIG_IPV6)
1528static void br_ip6_multicast_router_expired(struct timer_list *t)
1529{
9632233e
NA		 1530 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1531 ip6_mc_router_timer);
a3c02e76 1532
9632233e 1533 br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist);
a3c02e76
LL		 1534}
1535#endif
1536
77041420
YG		 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
dcbdf135 1547 switchdev_port_attr_set(p->dev, &attr, NULL);
77041420
YG		 1548}
1549
d3d065c0 1550static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx,
ee5fb222 1551 struct timer_list *timer)
eb1d1641 1552{
d3d065c0
NA		 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))
77041420
YG		 1558 goto out;
1559
d3d065c0 1560 br_mc_router_state_change(brmctx->br, false);
77041420 1561out:
d3d065c0 1562 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 1563}
1564
ee5fb222
LL		 1565static void br_ip4_multicast_local_router_expired(struct timer_list *t)
1566{
d3d065c0
NA		 1567 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1568 ip4_mc_router_timer);
ee5fb222 1569
d3d065c0 1570 br_multicast_local_router_expired(brmctx, t);
ee5fb222
LL		 1571}
1572
a3c02e76
LL		 1573#if IS_ENABLED(CONFIG_IPV6)
1574static void br_ip6_multicast_local_router_expired(struct timer_list *t)
1575{
d3d065c0
NA		 1576 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1577 ip6_mc_router_timer);
a3c02e76 1578
d3d065c0 1579 br_multicast_local_router_expired(brmctx, t);
a3c02e76
LL		 1580}
1581#endif
1582
d3d065c0 1583static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx,
90010b36 1584 struct bridge_mcast_own_query *query)
c83b8fab 1585{
d3d065c0
NA		 1586 spin_lock(&brmctx->br->multicast_lock);
1587 if (!netif_running(brmctx->br->dev) ||
4cdd0d10 1588 br_multicast_ctx_vlan_global_disabled(brmctx) ||
d3d065c0 1589 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 1590 goto out;
1591
adc47037 1592 br_multicast_start_querier(brmctx, query);
c83b8fab
HX		 1593
1594out:
d3d065c0 1595 spin_unlock(&brmctx->br->multicast_lock);
c83b8fab
HX		 1596}
1597
88c1f37f 1598static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1599{
d3d065c0
NA		 1600 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1601 ip4_other_query.timer);
cc0fdd80 1602
d3d065c0 1603 br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query);
cc0fdd80
LL		 1604}
1605
1606#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1607static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1608{
d3d065c0
NA		 1609 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1610 ip6_other_query.timer);
cc0fdd80 1611
d3d065c0 1612 br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query);
cc0fdd80
LL		 1613}
1614#endif
1615
adc47037 1616static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx,
dc4eb53a
LL		 1617 struct br_ip *ip,
1618 struct sk_buff *skb)
1619{
1620 if (ip->proto == htons(ETH_P_IP))
d3d065c0 1621 brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
dc4eb53a
LL		 1622#if IS_ENABLED(CONFIG_IPV6)
1623 else
d3d065c0 1624 brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
dc4eb53a
LL		 1625#endif
1626}
1627
adc47037
NA		 1628static void __br_multicast_send_query(struct net_bridge_mcast *brmctx,
1629 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 1630 struct net_bridge_port_group *pg,
1631 struct br_ip *ip_dst,
1632 struct br_ip *group,
1633 bool with_srcs,
42c11ccf
NA		 1634 u8 sflag,
1635 bool *need_rexmit)
eb1d1641 1636{
438ef2d0 1637 bool over_lmqt = !!sflag;
eb1d1641 1638 struct sk_buff *skb;
1080ab95 1639 u8 igmp_type;
eb1d1641 1640
cb486ce9
NA		 1641 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1642 !br_multicast_ctx_matches_vlan_snooping(brmctx))
615cc23e
NA		 1643 return;
1644
438ef2d0 1645again_under_lmqt:
615cc23e
NA		 1646 skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group,
1647 with_srcs, over_lmqt, sflag, &igmp_type,
42c11ccf 1648 need_rexmit);
eb1d1641 1649 if (!skb)
8ef2a9a5 1650 return;
eb1d1641 1651
adc47037
NA		 1652 if (pmctx) {
1653 skb->dev = pmctx->port->dev;
1654 br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type,
1080ab95 1655 BR_MCAST_DIR_TX);
29a26a56 1656 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
adc47037 1657 dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 1658 br_dev_queue_push_xmit);
438ef2d0
NA		 1659
1660 if (over_lmqt && with_srcs && sflag) {
1661 over_lmqt = false;
1662 goto again_under_lmqt;
1663 }
dc4eb53a 1664 } else {
adc47037
NA		 1665 br_multicast_select_own_querier(brmctx, group, skb);
1666 br_multicast_count(brmctx->br, NULL, skb, igmp_type,
1080ab95 1667 BR_MCAST_DIR_RX);
eb1d1641 1668 netif_rx(skb);
dc4eb53a 1669 }
8ef2a9a5
YH		 1670}
1671
67b746f9
NA		 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{
67b746f9
NA		 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
adc47037
NA		 1696static void br_multicast_send_query(struct net_bridge_mcast *brmctx,
1697 struct net_bridge_mcast_port *pmctx,
90010b36 1698 struct bridge_mcast_own_query *own_query)
8ef2a9a5 1699{
90010b36 1700 struct bridge_mcast_other_query *other_query = NULL;
67b746f9 1701 struct bridge_mcast_querier *querier;
5e923585
NA		 1702 struct br_ip br_group;
1703 unsigned long time;
8ef2a9a5 1704
4cdd0d10 1705 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
adc47037 1706 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
4d5b4e84 1707 !brmctx->multicast_querier)
8ef2a9a5
YH		 1708 return;
1709
eab3227b 1710 memset(&br_group.dst, 0, sizeof(br_group.dst));
08b202b6 1711
adc47037
NA		 1712 if (pmctx ? (own_query == &pmctx->ip4_own_query) :
1713 (own_query == &brmctx->ip4_own_query)) {
67b746f9 1714 querier = &brmctx->ip4_querier;
d3d065c0 1715 other_query = &brmctx->ip4_other_query;
cc0fdd80 1716 br_group.proto = htons(ETH_P_IP);
dfd56b8b 1717#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 1718 } else {
67b746f9 1719 querier = &brmctx->ip6_querier;
d3d065c0 1720 other_query = &brmctx->ip6_other_query;
cc0fdd80 1721 br_group.proto = htons(ETH_P_IPV6);
08b202b6 1722#endif
cc0fdd80
LL		 1723 }
1724
90010b36 1725 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 1726 return;
1727
67b746f9
NA		 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
adc47037
NA		 1735 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false,
1736 0, NULL);
eb1d1641 1737
eb1d1641 1738 time = jiffies;
d3d065c0
NA		 1739 time += own_query->startup_sent < brmctx->multicast_startup_query_count ?
1740 brmctx->multicast_startup_query_interval :
1741 brmctx->multicast_query_interval;
90010b36 1742 mod_timer(&own_query->timer, time);
eb1d1641
HX		 1743}
1744
90010b36 1745static void
9632233e 1746br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx,
90010b36 1747 struct bridge_mcast_own_query *query)
eb1d1641 1748{
9632233e 1749 struct net_bridge *br = pmctx->port->br;
4cdd0d10 1750 struct net_bridge_mcast *brmctx;
eb1d1641
HX		 1751
1752 spin_lock(&br->multicast_lock);
4cdd0d10 1753 if (br_multicast_port_ctx_state_stopped(pmctx))
eb1d1641 1754 goto out;
615cc23e 1755
4cdd0d10
NA		 1756 brmctx = br_multicast_port_ctx_get_global(pmctx);
1757 if (query->startup_sent < brmctx->multicast_startup_query_count)
cc0fdd80 1758 query->startup_sent++;
eb1d1641 1759
4cdd0d10 1760 br_multicast_send_query(brmctx, pmctx, query);
eb1d1641
HX		 1761
1762out:
1763 spin_unlock(&br->multicast_lock);
1764}
1765
88c1f37f 1766static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1767{
9632233e
NA		 1768 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1769 ip4_own_query.timer);
cc0fdd80 1770
9632233e 1771 br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query);
cc0fdd80
LL		 1772}
1773
1774#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1775static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1776{
9632233e
NA		 1777 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1778 ip6_own_query.timer);
cc0fdd80 1779
9632233e 1780 br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query);
cc0fdd80
LL		 1781}
1782#endif
1783
42c11ccf
NA		 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;
085b53c8 1788 struct net_bridge *br = pg->key.port->br;
adc47037
NA		 1789 struct net_bridge_mcast_port *pmctx;
1790 struct net_bridge_mcast *brmctx;
42c11ccf
NA		 1791 bool need_rexmit = false;
1792
1793 spin_lock(&br->multicast_lock);
1794 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
4d5b4e84 1795 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
42c11ccf
NA		 1796 goto out;
1797
eb1593a0
NA		 1798 pmctx = br_multicast_pg_to_port_ctx(pg);
1799 if (!pmctx)
1800 goto out;
1801 brmctx = br_multicast_port_ctx_get_global(pmctx);
4d5b4e84
NA		 1802 if (!brmctx->multicast_querier)
1803 goto out;
1804
085b53c8 1805 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 1806 other_query = &brmctx->ip4_other_query;
42c11ccf
NA		 1807#if IS_ENABLED(CONFIG_IPV6)
1808 else
d3d065c0 1809 other_query = &brmctx->ip6_other_query;
42c11ccf
NA		 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--;
adc47037 1817 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1818 &pg->key.addr, false, 1, NULL);
42c11ccf 1819 }
adc47037 1820 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1821 &pg->key.addr, true, 0, &need_rexmit);
42c11ccf
NA		 1822
1823 if (pg->grp_query_rexmit_cnt || need_rexmit)
1824 mod_timer(&pg->rexmit_timer, jiffies +
d3d065c0 1825 brmctx->multicast_last_member_interval);
42c11ccf
NA		 1826out:
1827 spin_unlock(&br->multicast_lock);
1828}
1829
ae1ea84b
FF		 1830static int br_mc_disabled_update(struct net_device *dev, bool value,
1831 struct netlink_ext_ack *extack)
147c1e9b
NF		 1832{
1833 struct switchdev_attr attr = {
1834 .orig_dev = dev,
1835 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1836 .flags = SWITCHDEV_F_DEFER,
13cefad2 1837 .u.mc_disabled = !value,
147c1e9b
NF		 1838 };
1839
ae1ea84b 1840 return switchdev_port_attr_set(dev, &attr, extack);
147c1e9b
NF		 1841}
1842
613d61db
NA		 1843void br_multicast_port_ctx_init(struct net_bridge_port *port,
1844 struct net_bridge_vlan *vlan,
1845 struct net_bridge_mcast_port *pmctx)
eb1d1641 1846{
9632233e 1847 pmctx->port = port;
613d61db 1848 pmctx->vlan = vlan;
9632233e
NA		 1849 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
1850 timer_setup(&pmctx->ip4_mc_router_timer,
ee5fb222 1851 br_ip4_multicast_router_expired, 0);
9632233e 1852 timer_setup(&pmctx->ip4_own_query.timer,
88c1f37f 1853 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 1854#if IS_ENABLED(CONFIG_IPV6)
9632233e 1855 timer_setup(&pmctx->ip6_mc_router_timer,
a3c02e76 1856 br_ip6_multicast_router_expired, 0);
9632233e 1857 timer_setup(&pmctx->ip6_own_query.timer,
88c1f37f 1858 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 1859#endif
9632233e
NA		 1860}
1861
613d61db 1862void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
9632233e
NA		 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;
613d61db 1875 br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx);
9632233e 1876
ae1ea84b
FF		 1877 err = br_mc_disabled_update(port->dev,
1878 br_opt_get(port->br,
1879 BROPT_MULTICAST_ENABLED),
1880 NULL);
68f5c12a 1881 if (err && err != -EOPNOTSUPP)
ae1ea84b 1882 return err;
147c1e9b 1883
1080ab95
NA		 1884 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
1885 if (!port->mcast_stats)
1886 return -ENOMEM;
1887
1888 return 0;
eb1d1641
HX		 1889}
1890
1891void br_multicast_del_port(struct net_bridge_port *port)
1892{
e10177ab
SA		 1893 struct net_bridge *br = port->br;
1894 struct net_bridge_port_group *pg;
e12cec65 1895 HLIST_HEAD(deleted_head);
e10177ab
SA		 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)
681590bd 1901 br_multicast_find_del_pg(br, pg);
e12cec65 1902 hlist_move_list(&br->mcast_gc_list, &deleted_head);
e10177ab 1903 spin_unlock_bh(&br->multicast_lock);
e12cec65 1904 br_multicast_gc(&deleted_head);
9632233e 1905 br_multicast_port_ctx_deinit(&port->multicast_ctx);
1080ab95 1906 free_percpu(port->mcast_stats);
eb1d1641
HX		 1907}
1908
90010b36 1909static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 1910{
cc0fdd80 1911 query->startup_sent = 0;
561f1103 1912
cc0fdd80
LL		 1913 if (try_to_del_timer_sync(&query->timer) >= 0 ||
1914 del_timer(&query->timer))
1915 mod_timer(&query->timer, jiffies);
561f1103
HX		 1916}
1917
adc47037 1918static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx)
eb1d1641 1919{
adc47037 1920 struct net_bridge *br = pmctx->port->br;
7b54aaaf 1921 struct net_bridge_mcast *brmctx;
eb1d1641 1922
7b54aaaf
NA		 1923 brmctx = br_multicast_port_ctx_get_global(pmctx);
1924 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
1925 !netif_running(br->dev))
7cb3f921 1926 return;
eb1d1641 1927
adc47037 1928 br_multicast_enable(&pmctx->ip4_own_query);
cc0fdd80 1929#if IS_ENABLED(CONFIG_IPV6)
adc47037 1930 br_multicast_enable(&pmctx->ip6_own_query);
cc0fdd80 1931#endif
adc47037
NA		 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);
a3c02e76 1935 }
7cb3f921 1936}
eb1d1641 1937
7cb3f921
NA		 1938void br_multicast_enable_port(struct net_bridge_port *port)
1939{
1940 struct net_bridge *br = port->br;
1941
f4b7002a 1942 spin_lock_bh(&br->multicast_lock);
adc47037 1943 __br_multicast_enable_port_ctx(&port->multicast_ctx);
f4b7002a 1944 spin_unlock_bh(&br->multicast_lock);
eb1d1641
HX		 1945}
1946
7b54aaaf 1947static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx)
eb1d1641 1948{
eb1d1641 1949 struct net_bridge_port_group *pg;
b67bfe0d 1950 struct hlist_node *n;
ed2d3597 1951 bool del = false;
eb1d1641 1952
7b54aaaf
NA		 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);
eb1d1641 1958
adc47037
NA		 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);
cc0fdd80 1963#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 1964 del_timer(&pmctx->ip6_mc_router_timer);
1965 del_timer(&pmctx->ip6_own_query.timer);
cc0fdd80 1966#endif
adc47037 1967 br_multicast_rport_del_notify(pmctx, del);
7b54aaaf
NA		 1968}
1969
1970void br_multicast_disable_port(struct net_bridge_port *port)
1971{
f4b7002a 1972 spin_lock_bh(&port->br->multicast_lock);
7b54aaaf 1973 __br_multicast_disable_port_ctx(&port->multicast_ctx);
f4b7002a 1974 spin_unlock_bh(&port->br->multicast_lock);
eb1d1641
HX		 1975}
1976
e6231bca
NA		 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) {
d5a10222 1985 br_multicast_del_group_src(ent, false);
e6231bca
NA		 1986 deleted++;
1987 }
1988
1989 return deleted;
1990}
1991
b0812368
NA		 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
adc47037
NA		 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)
5bf1e00b
NA		 2002{
2003 struct bridge_mcast_other_query *other_query = NULL;
d3d065c0 2004 u32 lmqc = brmctx->multicast_last_member_count;
5bf1e00b
NA		 2005 unsigned long lmqt, lmi, now = jiffies;
2006 struct net_bridge_group_src *ent;
2007
adc47037
NA		 2008 if (!netif_running(brmctx->br->dev) ||
2009 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
5bf1e00b
NA		 2010 return;
2011
085b53c8 2012 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 2013 other_query = &brmctx->ip4_other_query;
5bf1e00b
NA		 2014#if IS_ENABLED(CONFIG_IPV6)
2015 else
d3d065c0 2016 other_query = &brmctx->ip6_other_query;
5bf1e00b
NA		 2017#endif
2018
adc47037 2019 lmqt = now + br_multicast_lmqt(brmctx);
5bf1e00b
NA		 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) {
4d5b4e84 2024 if (brmctx->multicast_querier &&
5bf1e00b
NA		 2025 other_query &&
2026 !timer_pending(&other_query->timer))
2027 ent->src_query_rexmit_cnt = lmqc;
b0812368 2028 __grp_src_mod_timer(ent, lmqt);
5bf1e00b
NA		 2029 }
2030 }
2031 }
2032
4d5b4e84 2033 if (!brmctx->multicast_querier ||
5bf1e00b
NA		 2034 !other_query || timer_pending(&other_query->timer))
2035 return;
2036
adc47037 2037 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 2038 &pg->key.addr, true, 1, NULL);
5bf1e00b 2039
d3d065c0 2040 lmi = now + brmctx->multicast_last_member_interval;
5bf1e00b
NA		 2041 if (!timer_pending(&pg->rexmit_timer) ||
2042 time_after(pg->rexmit_timer.expires, lmi))
2043 mod_timer(&pg->rexmit_timer, lmi);
2044}
2045
adc47037
NA		 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)
5bf1e00b
NA		 2049{
2050 struct bridge_mcast_other_query *other_query = NULL;
5bf1e00b
NA		 2051 unsigned long now = jiffies, lmi;
2052
adc47037
NA		 2053 if (!netif_running(brmctx->br->dev) ||
2054 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
5bf1e00b
NA		 2055 return;
2056
085b53c8 2057 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 2058 other_query = &brmctx->ip4_other_query;
5bf1e00b
NA		 2059#if IS_ENABLED(CONFIG_IPV6)
2060 else
d3d065c0 2061 other_query = &brmctx->ip6_other_query;
5bf1e00b
NA		 2062#endif
2063
4d5b4e84 2064 if (brmctx->multicast_querier &&
5bf1e00b 2065 other_query && !timer_pending(&other_query->timer)) {
d3d065c0
NA		 2066 lmi = now + brmctx->multicast_last_member_interval;
2067 pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1;
adc47037 2068 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 2069 &pg->key.addr, false, 0, NULL);
5bf1e00b
NA		 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) ||
adc47037
NA		 2077 time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx))))
2078 mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx));
5bf1e00b
NA		 2079}
2080
0436862e
NA		 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 */
adc47037
NA		 2086static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx,
2087 struct net_bridge_port_group *pg, void *h_addr,
474ddb37
NA		 2088 void *srcs, u32 nsrcs, size_t addr_size,
2089 int grec_type)
0436862e 2090{
0436862e
NA		 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));
085b53c8 2098 src_ip.proto = pg->key.addr.proto;
0436862e 2099 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2100 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
0436862e
NA		 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)
adc47037 2109 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
0436862e
NA		 2110 }
2111
adc47037
NA		 2112 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2113 grec_type))
474ddb37
NA		 2114 changed = true;
2115
0436862e
NA		 2116 return changed;
2117}
2118
e6231bca
NA		 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 */
adc47037
NA		 2124static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx,
2125 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2126 void *srcs, u32 nsrcs, size_t addr_size,
2127 int grec_type)
e6231bca
NA		 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));
085b53c8 2137 src_ip.proto = pg->key.addr.proto;
e6231bca 2138 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2139 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
e6231bca
NA		 2140 ent = br_multicast_find_group_src(pg, &src_ip);
2141 if (ent)
2142 ent->flags &= ~BR_SGRP_F_DELETE;
2143 else
b0812368
NA		 2144 ent = br_multicast_new_group_src(pg, &src_ip);
2145 if (ent)
2146 br_multicast_fwd_src_handle(ent);
e6231bca
NA		 2147 }
2148
adc47037
NA		 2149 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2150 grec_type);
ddc255d9 2151
e6231bca
NA		 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 */
adc47037
NA		 2161static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx,
2162 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2163 void *srcs, u32 nsrcs, size_t addr_size,
2164 int grec_type)
e6231bca 2165{
e6231bca
NA		 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));
085b53c8 2176 src_ip.proto = pg->key.addr.proto;
e6231bca 2177 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2178 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
e6231bca
NA		 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) {
b0812368 2185 __grp_src_mod_timer(ent,
adc47037 2186 now + br_multicast_gmi(brmctx));
e6231bca
NA		 2187 changed = true;
2188 }
2189 }
e6231bca
NA		 2190 }
2191
adc47037
NA		 2192 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2193 grec_type))
ddc255d9
NA		 2194 changed = true;
2195
e6231bca
NA		 2196 if (__grp_src_delete_marked(pg))
2197 changed = true;
2198
2199 return changed;
2200}
2201
adc47037
NA		 2202static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx,
2203 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2204 void *srcs, u32 nsrcs, size_t addr_size,
2205 int grec_type)
e6231bca 2206{
e6231bca
NA		 2207 bool changed = false;
2208
2209 switch (pg->filter_mode) {
2210 case MCAST_INCLUDE:
adc47037 2211 __grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
ddc255d9 2212 grec_type);
8266a049 2213 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
e6231bca
NA		 2214 changed = true;
2215 break;
2216 case MCAST_EXCLUDE:
adc47037
NA		 2217 changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs,
2218 addr_size, grec_type);
e6231bca
NA		 2219 break;
2220 }
2221
2222 pg->filter_mode = MCAST_EXCLUDE;
adc47037 2223 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
e6231bca
NA		 2224
2225 return changed;
2226}
2227
5bf1e00b
NA		 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 */
adc47037
NA		 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,
ddc255d9
NA		 2235 void *srcs, u32 nsrcs, size_t addr_size,
2236 int grec_type)
5bf1e00b 2237{
5bf1e00b
NA		 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));
085b53c8 2248 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2249 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2250 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 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)
adc47037 2261 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2262 }
2263
adc47037
NA		 2264 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2265 grec_type))
ddc255d9
NA		 2266 changed = true;
2267
5bf1e00b 2268 if (to_send)
adc47037 2269 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 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 */
adc47037
NA		 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,
ddc255d9
NA		 2282 void *srcs, u32 nsrcs, size_t addr_size,
2283 int grec_type)
5bf1e00b 2284{
5bf1e00b
NA		 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));
085b53c8 2296 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2297 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2298 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 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)
adc47037 2311 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2312 }
2313
adc47037
NA		 2314 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2315 grec_type))
ddc255d9
NA		 2316 changed = true;
2317
5bf1e00b 2318 if (to_send)
adc47037 2319 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b 2320
adc47037 2321 __grp_send_query_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2322
2323 return changed;
2324}
2325
adc47037
NA		 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,
ddc255d9
NA		 2329 void *srcs, u32 nsrcs, size_t addr_size,
2330 int grec_type)
5bf1e00b
NA		 2331{
2332 bool changed = false;
2333
2334 switch (pg->filter_mode) {
2335 case MCAST_INCLUDE:
adc47037
NA		 2336 changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs,
2337 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2338 break;
2339 case MCAST_EXCLUDE:
adc47037
NA		 2340 changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs,
2341 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2342 break;
2343 }
2344
ddc255d9 2345 if (br_multicast_eht_should_del_pg(pg)) {
d5a10222 2346 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
ddc255d9
NA		 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
5bf1e00b
NA		 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 */
adc47037
NA		 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,
ddc255d9
NA		 2366 void *srcs, u32 nsrcs, size_t addr_size,
2367 int grec_type)
5bf1e00b
NA		 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));
085b53c8 2377 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2378 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2379 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 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 {
b0812368 2386 ent = br_multicast_new_group_src(pg, &src_ip);
5bf1e00b 2387 }
b0812368
NA		 2388 if (ent)
2389 br_multicast_fwd_src_handle(ent);
5bf1e00b
NA		 2390 }
2391
adc47037
NA		 2392 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2393 grec_type);
ddc255d9 2394
5bf1e00b
NA		 2395 __grp_src_delete_marked(pg);
2396 if (to_send)
adc47037 2397 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 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 */
adc47037
NA		 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,
ddc255d9
NA		 2410 void *srcs, u32 nsrcs, size_t addr_size,
2411 int grec_type)
5bf1e00b
NA		 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));
085b53c8 2422 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2423 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2424 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 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) {
b0812368 2431 __grp_src_mod_timer(ent, pg->timer.expires);
5bf1e00b
NA		 2432 changed = true;
2433 }
2434 }
2435 if (ent && timer_pending(&ent->timer)) {
2436 ent->flags |= BR_SGRP_F_SEND;
2437 to_send++;
2438 }
5bf1e00b
NA		 2439 }
2440
adc47037
NA		 2441 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2442 grec_type))
ddc255d9
NA		 2443 changed = true;
2444
5bf1e00b
NA		 2445 if (__grp_src_delete_marked(pg))
2446 changed = true;
2447 if (to_send)
adc47037 2448 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2449
2450 return changed;
2451}
2452
adc47037
NA		 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,
ddc255d9
NA		 2456 void *srcs, u32 nsrcs, size_t addr_size,
2457 int grec_type)
5bf1e00b 2458{
5bf1e00b
NA		 2459 bool changed = false;
2460
2461 switch (pg->filter_mode) {
2462 case MCAST_INCLUDE:
adc47037
NA		 2463 __grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs,
2464 addr_size, grec_type);
8266a049 2465 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
5bf1e00b
NA		 2466 changed = true;
2467 break;
2468 case MCAST_EXCLUDE:
adc47037
NA		 2469 changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs,
2470 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2471 break;
2472 }
2473
2474 pg->filter_mode = MCAST_EXCLUDE;
adc47037 2475 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2476
2477 return changed;
2478}
2479
109865fe
NA		 2480/* State Msg type New state Actions
2481 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2482 */
adc47037
NA		 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,
474ddb37 2486 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2487{
2488 struct net_bridge_group_src *ent;
2489 u32 src_idx, to_send = 0;
0ad57c99 2490 bool changed = false;
109865fe
NA		 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));
085b53c8 2497 src_ip.proto = pg->key.addr.proto;
109865fe 2498 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2499 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
109865fe
NA		 2500 ent = br_multicast_find_group_src(pg, &src_ip);
2501 if (ent) {
2502 ent->flags |= BR_SGRP_F_SEND;
2503 to_send++;
2504 }
109865fe
NA		 2505 }
2506
adc47037
NA		 2507 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2508 grec_type))
474ddb37
NA		 2509 changed = true;
2510
109865fe 2511 if (to_send)
adc47037 2512 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
109865fe 2513
0ad57c99 2514 return changed;
109865fe
NA		 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 */
adc47037
NA		 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,
474ddb37 2524 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 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));
085b53c8 2535 src_ip.proto = pg->key.addr.proto;
109865fe 2536 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2537 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
109865fe
NA		 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) {
b0812368 2542 __grp_src_mod_timer(ent, pg->timer.expires);
109865fe
NA		 2543 changed = true;
2544 }
2545 }
2546 if (ent && timer_pending(&ent->timer)) {
2547 ent->flags |= BR_SGRP_F_SEND;
2548 to_send++;
2549 }
109865fe
NA		 2550 }
2551
adc47037
NA		 2552 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2553 grec_type))
474ddb37
NA		 2554 changed = true;
2555
109865fe 2556 if (to_send)
adc47037 2557 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
109865fe
NA		 2558
2559 return changed;
2560}
2561
adc47037
NA		 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,
474ddb37 2565 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2566{
2567 bool changed = false;
2568
2569 switch (pg->filter_mode) {
2570 case MCAST_INCLUDE:
adc47037
NA		 2571 changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs,
2572 nsrcs, addr_size, grec_type);
109865fe
NA		 2573 break;
2574 case MCAST_EXCLUDE:
adc47037
NA		 2575 changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs,
2576 nsrcs, addr_size, grec_type);
109865fe
NA		 2577 break;
2578 }
2579
e87e4b5c
NA		 2580 if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
2581 br_multicast_eht_should_del_pg(pg)) {
d5a10222
NA		 2582 if (br_multicast_eht_should_del_pg(pg))
2583 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
e87e4b5c
NA		 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
109865fe
NA		 2591 return changed;
2592}
2593
0436862e
NA		 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{
071445c6 2599 struct net_bridge *br __maybe_unused = mp->br;
0436862e 2600 struct net_bridge_port_group *pg;
0436862e
NA		 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
adc47037
NA		 2611static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx,
2612 struct net_bridge_mcast_port *pmctx,
06499098
VY		 2613 struct sk_buff *skb,
2614 u16 vid)
eb1d1641 2615{
adc47037 2616 bool igmpv2 = brmctx->multicast_igmp_version == 2;
0436862e
NA		 2617 struct net_bridge_mdb_entry *mdst;
2618 struct net_bridge_port_group *pg;
6db6f0ea 2619 const unsigned char *src;
eb1d1641
HX		 2620 struct igmpv3_report *ih;
2621 struct igmpv3_grec *grec;
0436862e 2622 int i, len, num, type;
54bea721 2623 __be32 group, *h_addr;
0436862e 2624 bool changed = false;
0436862e 2625 int err = 0;
e57f6185 2626 u16 nsrcs;
eb1d1641 2627
eb1d1641
HX		 2628 ih = igmpv3_report_hdr(skb);
2629 num = ntohs(ih->ngrec);
c2d4fbd2 2630 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 2631
2632 for (i = 0; i < num; i++) {
2633 len += sizeof(*grec);
ba5ea614 2634 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2635 return -EINVAL;
2636
fd218cf9 2637 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 2638 group = grec->grec_mca;
2639 type = grec->grec_type;
e57f6185 2640 nsrcs = ntohs(grec->grec_nsrcs);
eb1d1641 2641
e57f6185 2642 len += nsrcs * 4;
ba5ea614 2643 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2644 return -EINVAL;
2645
eb1d1641
HX		 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
6db6f0ea 2659 src = eth_hdr(skb)->h_source;
0436862e
NA		 2660 if (nsrcs == 0 &&
2661 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2662 type == IGMPV3_MODE_IS_INCLUDE)) {
adc47037
NA		 2663 if (!pmctx || igmpv2) {
2664 br_ip4_multicast_leave_group(brmctx, pmctx,
2665 group, vid, src);
0436862e
NA		 2666 continue;
2667 }
bc8c20ac 2668 } else {
adc47037
NA		 2669 err = br_ip4_multicast_add_group(brmctx, pmctx, group,
2670 vid, src, igmpv2);
bc8c20ac
SA		 2671 if (err)
2672 break;
2673 }
0436862e 2674
adc47037 2675 if (!pmctx || igmpv2)
0436862e
NA		 2676 continue;
2677
262985fa 2678 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10
NA		 2679 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2680 goto unlock_continue;
2681
adc47037 2682 mdst = br_mdb_ip4_get(brmctx->br, group, vid);
0436862e
NA		 2683 if (!mdst)
2684 goto unlock_continue;
adc47037 2685 pg = br_multicast_find_port(mdst, pmctx->port, src);
0436862e
NA		 2686 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2687 goto unlock_continue;
54bea721 2688 /* reload grec and host addr */
0436862e 2689 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
54bea721 2690 h_addr = &ip_hdr(skb)->saddr;
0436862e
NA		 2691 switch (type) {
2692 case IGMPV3_ALLOW_NEW_SOURCES:
adc47037
NA		 2693 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2694 grec->grec_src,
474ddb37 2695 nsrcs, sizeof(__be32), type);
0436862e 2696 break;
e6231bca 2697 case IGMPV3_MODE_IS_INCLUDE:
adc47037
NA		 2698 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2699 grec->grec_src,
474ddb37 2700 nsrcs, sizeof(__be32), type);
e6231bca
NA		 2701 break;
2702 case IGMPV3_MODE_IS_EXCLUDE:
adc47037
NA		 2703 changed = br_multicast_isexc(brmctx, pg, h_addr,
2704 grec->grec_src,
ddc255d9 2705 nsrcs, sizeof(__be32), type);
e6231bca 2706 break;
5bf1e00b 2707 case IGMPV3_CHANGE_TO_INCLUDE:
adc47037
NA		 2708 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
2709 grec->grec_src,
ddc255d9 2710 nsrcs, sizeof(__be32), type);
5bf1e00b
NA		 2711 break;
2712 case IGMPV3_CHANGE_TO_EXCLUDE:
adc47037
NA		 2713 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
2714 grec->grec_src,
ddc255d9 2715 nsrcs, sizeof(__be32), type);
5bf1e00b 2716 break;
109865fe 2717 case IGMPV3_BLOCK_OLD_SOURCES:
adc47037
NA		 2718 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
2719 grec->grec_src,
474ddb37 2720 nsrcs, sizeof(__be32), type);
109865fe 2721 break;
0436862e
NA		 2722 }
2723 if (changed)
adc47037 2724 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
0436862e 2725unlock_continue:
262985fa 2726 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 2727 }
2728
2729 return err;
2730}
2731
dfd56b8b 2732#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 2733static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx,
2734 struct net_bridge_mcast_port *pmctx,
06499098
VY		 2735 struct sk_buff *skb,
2736 u16 vid)
08b202b6 2737{
adc47037 2738 bool mldv1 = brmctx->multicast_mld_version == 1;
0436862e
NA		 2739 struct net_bridge_mdb_entry *mdst;
2740 struct net_bridge_port_group *pg;
ba5ea614 2741 unsigned int nsrcs_offset;
6baeb395 2742 struct mld2_report *mld2r;
6db6f0ea 2743 const unsigned char *src;
54bea721 2744 struct in6_addr *h_addr;
08b202b6 2745 struct mld2_grec *grec;
ba5ea614 2746 unsigned int grec_len;
0436862e
NA		 2747 bool changed = false;
2748 int i, len, num;
08b202b6
YH		 2749 int err = 0;
2750
6baeb395 2751 if (!ipv6_mc_may_pull(skb, sizeof(*mld2r)))
08b202b6
YH		 2752 return -EINVAL;
2753
6baeb395
M		 2754 mld2r = (struct mld2_report *)icmp6_hdr(skb);
2755 num = ntohs(mld2r->mld2r_ngrec);
2756 len = skb_transport_offset(skb) + sizeof(*mld2r);
08b202b6
YH		 2757
2758 for (i = 0; i < num; i++) {
e57f6185
NA		 2759 __be16 *_nsrcs, __nsrcs;
2760 u16 nsrcs;
08b202b6 2761
ba5ea614
LL		 2762 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2763
2764 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
5fc6266a 2765 nsrcs_offset + sizeof(__nsrcs))
ba5ea614
LL		 2766 return -EINVAL;
2767
e57f6185
NA		 2768 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2769 sizeof(__nsrcs), &__nsrcs);
2770 if (!_nsrcs)
08b202b6
YH		 2771 return -EINVAL;
2772
e57f6185
NA		 2773 nsrcs = ntohs(*_nsrcs);
2774 grec_len = struct_size(grec, grec_src, nsrcs);
ba5ea614
LL		 2775
2776 if (!ipv6_mc_may_pull(skb, len + grec_len))
08b202b6
YH		 2777 return -EINVAL;
2778
2779 grec = (struct mld2_grec *)(skb->data + len);
ba5ea614 2780 len += grec_len;
08b202b6 2781
08b202b6
YH		 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
6db6f0ea 2795 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 2796 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2797 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
e57f6185 2798 nsrcs == 0) {
adc47037
NA		 2799 if (!pmctx || mldv1) {
2800 br_ip6_multicast_leave_group(brmctx, pmctx,
0436862e
NA		 2801 &grec->grec_mca,
2802 vid, src);
2803 continue;
2804 }
bc8c20ac 2805 } else {
adc47037 2806 err = br_ip6_multicast_add_group(brmctx, pmctx,
6db6f0ea 2807 &grec->grec_mca, vid,
0436862e 2808 src, mldv1);
9264251e 2809 if (err)
bc8c20ac
SA		 2810 break;
2811 }
0436862e 2812
adc47037 2813 if (!pmctx || mldv1)
0436862e
NA		 2814 continue;
2815
262985fa 2816 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10
NA		 2817 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2818 goto unlock_continue;
2819
adc47037 2820 mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid);
0436862e
NA		 2821 if (!mdst)
2822 goto unlock_continue;
adc47037 2823 pg = br_multicast_find_port(mdst, pmctx->port, src);
0436862e
NA		 2824 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2825 goto unlock_continue;
54bea721 2826 h_addr = &ipv6_hdr(skb)->saddr;
0436862e
NA		 2827 switch (grec->grec_type) {
2828 case MLD2_ALLOW_NEW_SOURCES:
adc47037 2829 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
54bea721 2830 grec->grec_src, nsrcs,
474ddb37
NA		 2831 sizeof(struct in6_addr),
2832 grec->grec_type);
0436862e 2833 break;
e6231bca 2834 case MLD2_MODE_IS_INCLUDE:
adc47037 2835 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
54bea721 2836 grec->grec_src, nsrcs,
474ddb37
NA		 2837 sizeof(struct in6_addr),
2838 grec->grec_type);
e6231bca
NA		 2839 break;
2840 case MLD2_MODE_IS_EXCLUDE:
adc47037 2841 changed = br_multicast_isexc(brmctx, pg, h_addr,
54bea721 2842 grec->grec_src, nsrcs,
ddc255d9
NA		 2843 sizeof(struct in6_addr),
2844 grec->grec_type);
e6231bca 2845 break;
5bf1e00b 2846 case MLD2_CHANGE_TO_INCLUDE:
adc47037 2847 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
54bea721 2848 grec->grec_src, nsrcs,
ddc255d9
NA		 2849 sizeof(struct in6_addr),
2850 grec->grec_type);
5bf1e00b
NA		 2851 break;
2852 case MLD2_CHANGE_TO_EXCLUDE:
adc47037 2853 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
54bea721 2854 grec->grec_src, nsrcs,
ddc255d9
NA		 2855 sizeof(struct in6_addr),
2856 grec->grec_type);
5bf1e00b 2857 break;
109865fe 2858 case MLD2_BLOCK_OLD_SOURCES:
adc47037 2859 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
54bea721 2860 grec->grec_src, nsrcs,
474ddb37
NA		 2861 sizeof(struct in6_addr),
2862 grec->grec_type);
109865fe 2863 break;
0436862e
NA		 2864 }
2865 if (changed)
adc47037 2866 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
0436862e 2867unlock_continue:
262985fa 2868 spin_unlock(&brmctx->br->multicast_lock);
08b202b6
YH		 2869 }
2870
2871 return err;
2872}
2873#endif
2874
c3fb3698
NA		 2875static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx,
2876 struct net_bridge_mcast_port *pmctx,
2877 struct br_ip *saddr)
dc4eb53a 2878{
67b746f9 2879 int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0;
c3fb3698
NA		 2880 struct timer_list *own_timer, *other_timer;
2881 struct bridge_mcast_querier *querier;
54cb4319 2882
c3fb3698
NA		 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;
dc4eb53a 2892#if IS_ENABLED(CONFIG_IPV6)
c3fb3698
NA		 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 }
dc4eb53a 2904
c3fb3698 2905 if (!timer_pending(own_timer) && !timer_pending(other_timer))
dc4eb53a
LL		 2906 goto update;
2907
2908 return false;
2909
2910update:
c3fb3698 2911 br_multicast_update_querier(brmctx, querier, port_ifidx, saddr);
2cd41431 2912
dc4eb53a
LL		 2913 return true;
2914}
dc4eb53a 2915
c7fa1d9b
NA		 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{
cdda378b 2939 return nla_total_size(0) + /* nest attribute */
c7fa1d9b
NA		 2940 nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */
2941 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IP_PORT */
175e6692
NA		 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;
c7fa1d9b
NA		 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
f137b7d4
NA		 2960 if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
2961 br_multicast_ctx_vlan_global_disabled(brmctx))
2962 return 0;
2963
c7fa1d9b
NA		 2964 nest = nla_nest_start(skb, nest_attr);
2965 if (!nest)
2966 return -EMSGSIZE;
2967
2968 rcu_read_lock();
85b41082
NA		 2969 if (!brmctx->multicast_querier &&
2970 !timer_pending(&brmctx->ip4_other_query.timer))
2971 goto out_v6;
2972
c7fa1d9b
NA		 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 }
85b41082
NA		 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
c7fa1d9b
NA		 3015 rcu_read_unlock();
3016 nla_nest_end(skb, nest);
85b41082
NA		 3017 if (!nla_len(nest))
3018 nla_nest_cancel(skb, nest);
c7fa1d9b
NA		 3019
3020 return 0;
3021
3022out_err:
3023 nla_nest_cancel(skb, nest);
3024 return -EMSGSIZE;
3025}
3026
cc0fdd80 3027static void
adc47037 3028br_multicast_update_query_timer(struct net_bridge_mcast *brmctx,
90010b36
LL		 3029 struct bridge_mcast_other_query *query,
3030 unsigned long max_delay)
b00589af 3031{
90010b36
LL		 3032 if (!timer_pending(&query->timer))
3033 query->delay_time = jiffies + max_delay;
b00589af 3034
adc47037 3035 mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval);
b00589af
LL		 3036}
3037
6d549648
NF		 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
dcbdf135 3048 switchdev_port_attr_set(p->dev, &attr, NULL);
6d549648
NF		 3049}
3050
d9b8c4d8 3051static struct net_bridge_port *
d3d065c0 3052br_multicast_rport_from_node(struct net_bridge_mcast *brmctx,
d9b8c4d8
LL		 3053 struct hlist_head *mc_router_list,
3054 struct hlist_node *rlist)
3055{
9632233e
NA		 3056 struct net_bridge_mcast_port *pmctx;
3057
a3c02e76 3058#if IS_ENABLED(CONFIG_IPV6)
d3d065c0 3059 if (mc_router_list == &brmctx->ip6_mc_router_list)
9632233e
NA		 3060 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3061 ip6_rlist);
3062 else
a3c02e76 3063#endif
9632233e
NA		 3064 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3065 ip4_rlist);
3066
3067 return pmctx->port;
d9b8c4d8
LL		 3068}
3069
3070static struct hlist_node *
d3d065c0 3071br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx,
d9b8c4d8
LL		 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) {
d3d065c0 3081 p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist);
d9b8c4d8
LL		 3082
3083 if ((unsigned long)port >= (unsigned long)p)
3084 break;
3085
3086 slot = rlist;
3087 }
3088
3089 return slot;
3090}
3091
adc47037 3092static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx,
a3c02e76
LL		 3093 struct hlist_node *rnode)
3094{
3095#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3096 if (rnode != &pmctx->ip6_rlist)
3097 return hlist_unhashed(&pmctx->ip6_rlist);
a3c02e76 3098 else
adc47037 3099 return hlist_unhashed(&pmctx->ip4_rlist);
a3c02e76
LL		 3100#else
3101 return true;
3102#endif
3103}
3104
d9b8c4d8 3105/* Add port to router_list
7e80c124 3106 * list is maintained ordered by pointer value
3107 * and locked by br->multicast_lock and RCU
3108 */
d3d065c0 3109static void br_multicast_add_router(struct net_bridge_mcast *brmctx,
adc47037 3110 struct net_bridge_mcast_port *pmctx,
d9b8c4d8
LL		 3111 struct hlist_node *rlist,
3112 struct hlist_head *mc_router_list)
0909e117 3113{
d9b8c4d8 3114 struct hlist_node *slot;
dcdca2c4 3115
d9b8c4d8 3116 if (!hlist_unhashed(rlist))
1a040eac
NA		 3117 return;
3118
adc47037 3119 slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list);
dcdca2c4 3120
7e80c124 3121 if (slot)
d9b8c4d8 3122 hlist_add_behind_rcu(rlist, slot);
dcdca2c4 3123 else
d9b8c4d8
LL		 3124 hlist_add_head_rcu(rlist, mc_router_list);
3125
a3c02e76
LL		 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 */
adc47037 3130 if (br_multicast_no_router_otherpf(pmctx, rlist)) {
1e9ca456 3131 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB);
adc47037 3132 br_port_mc_router_state_change(pmctx->port, true);
a3c02e76 3133 }
0909e117
HX		 3134}
3135
d9b8c4d8
LL		 3136/* Add port to router_list
3137 * list is maintained ordered by pointer value
3138 * and locked by br->multicast_lock and RCU
3139 */
adc47037
NA		 3140static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
3141 struct net_bridge_mcast_port *pmctx)
d9b8c4d8 3142{
adc47037
NA		 3143 br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist,
3144 &brmctx->ip4_mc_router_list);
d9b8c4d8
LL		 3145}
3146
a3c02e76
LL		 3147/* Add port to router_list
3148 * list is maintained ordered by pointer value
3149 * and locked by br->multicast_lock and RCU
3150 */
adc47037
NA		 3151static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
3152 struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 3153{
3154#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3155 br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist,
3156 &brmctx->ip6_mc_router_list);
a3c02e76
LL		 3157#endif
3158}
3159
adc47037
NA		 3160static void br_multicast_mark_router(struct net_bridge_mcast *brmctx,
3161 struct net_bridge_mcast_port *pmctx,
d9b8c4d8
LL		 3162 struct timer_list *timer,
3163 struct hlist_node *rlist,
3164 struct hlist_head *mc_router_list)
eb1d1641
HX		 3165{
3166 unsigned long now = jiffies;
eb1d1641 3167
4cdd0d10
NA		 3168 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3169 return;
3170
adc47037 3171 if (!pmctx) {
d3d065c0
NA		 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))
adc47037 3175 br_mc_router_state_change(brmctx->br, true);
d3d065c0 3176 mod_timer(timer, now + brmctx->multicast_querier_interval);
77041420 3177 }
eb1d1641
HX		 3178 return;
3179 }
3180
adc47037
NA		 3181 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
3182 pmctx->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 3183 return;
3184
adc47037 3185 br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list);
d3d065c0 3186 mod_timer(timer, now + brmctx->multicast_querier_interval);
d9b8c4d8
LL		 3187}
3188
adc47037
NA		 3189static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx,
3190 struct net_bridge_mcast_port *pmctx)
d9b8c4d8 3191{
adc47037 3192 struct timer_list *timer = &brmctx->ip4_mc_router_timer;
d9b8c4d8
LL		 3193 struct hlist_node *rlist = NULL;
3194
adc47037
NA		 3195 if (pmctx) {
3196 timer = &pmctx->ip4_mc_router_timer;
3197 rlist = &pmctx->ip4_rlist;
d9b8c4d8 3198 }
eb1d1641 3199
adc47037
NA		 3200 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3201 &brmctx->ip4_mc_router_list);
eb1d1641
HX		 3202}
3203
adc47037
NA		 3204static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx,
3205 struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 3206{
3207#if IS_ENABLED(CONFIG_IPV6)
adc47037 3208 struct timer_list *timer = &brmctx->ip6_mc_router_timer;
a3c02e76
LL		 3209 struct hlist_node *rlist = NULL;
3210
adc47037
NA		 3211 if (pmctx) {
3212 timer = &pmctx->ip6_mc_router_timer;
3213 rlist = &pmctx->ip6_rlist;
a3c02e76
LL		 3214 }
3215
adc47037
NA		 3216 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3217 &brmctx->ip6_mc_router_list);
a3c02e76
LL		 3218#endif
3219}
3220
b19232ef 3221static void
adc47037
NA		 3222br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx,
3223 struct net_bridge_mcast_port *pmctx,
b19232ef
LL		 3224 struct bridge_mcast_other_query *query,
3225 struct br_ip *saddr,
3226 unsigned long max_delay)
3227{
c3fb3698 3228 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
b19232ef
LL		 3229 return;
3230
adc47037
NA		 3231 br_multicast_update_query_timer(brmctx, query, max_delay);
3232 br_ip4_multicast_mark_router(brmctx, pmctx);
b19232ef
LL		 3233}
3234
3235#if IS_ENABLED(CONFIG_IPV6)
3236static void
adc47037
NA		 3237br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx,
3238 struct net_bridge_mcast_port *pmctx,
b19232ef
LL		 3239 struct bridge_mcast_other_query *query,
3240 struct br_ip *saddr,
3241 unsigned long max_delay)
eb1d1641 3242{
c3fb3698 3243 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
eb1d1641
HX		 3244 return;
3245
adc47037
NA		 3246 br_multicast_update_query_timer(brmctx, query, max_delay);
3247 br_ip6_multicast_mark_router(brmctx, pmctx);
eb1d1641 3248}
b19232ef 3249#endif
eb1d1641 3250
adc47037
NA		 3251static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx,
3252 struct net_bridge_mcast_port *pmctx,
9c2e955c 3253 struct sk_buff *skb,
3254 u16 vid)
eb1d1641 3255{
ba5ea614 3256 unsigned int transport_len = ip_transport_len(skb);
b71d1d42 3257 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 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;
e8051688 3262 struct net_bridge_port_group __rcu **pp;
67b746f9 3263 struct br_ip saddr = {};
eb1d1641
HX		 3264 unsigned long max_delay;
3265 unsigned long now = jiffies;
3266 __be32 group;
3267
adc47037 3268 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10 3269 if (!br_multicast_ctx_should_use(brmctx, pmctx))
eb1d1641
HX		 3270 goto out;
3271
eb1d1641
HX		 3272 group = ih->group;
3273
ba5ea614 3274 if (transport_len == sizeof(*ih)) {
eb1d1641
HX		 3275 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
3276
3277 if (!max_delay) {
3278 max_delay = 10 * HZ;
3279 group = 0;
3280 }
ba5ea614 3281 } else if (transport_len >= sizeof(*ih3)) {
eb1d1641 3282 ih3 = igmpv3_query_hdr(skb);
23550b83 3283 if (ih3->nsrcs ||
d3d065c0
NA		 3284 (brmctx->multicast_igmp_version == 3 && group &&
3285 ih3->suppress))
bec68ff1 3286 goto out;
eb1d1641 3287
0ba8c9ec
YH		 3288 max_delay = ih3->code ?
3289 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 3290 } else {
9ed973cc
LL		 3291 goto out;
3292 }
3293
dc4eb53a
LL		 3294 if (!group) {
3295 saddr.proto = htons(ETH_P_IP);
deb96566 3296 saddr.src.ip4 = iph->saddr;
b00589af 3297
adc47037 3298 br_ip4_multicast_query_received(brmctx, pmctx,
d3d065c0 3299 &brmctx->ip4_other_query,
b19232ef 3300 &saddr, max_delay);
eb1d1641 3301 goto out;
dc4eb53a 3302 }
eb1d1641 3303
adc47037 3304 mp = br_mdb_ip4_get(brmctx->br, group, vid);
eb1d1641
HX		 3305 if (!mp)
3306 goto out;
3307
d3d065c0 3308 max_delay *= brmctx->multicast_last_member_count;
eb1d1641 3309
ff0fd34e 3310 if (mp->host_joined &&
eb1d1641
HX		 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
e8051688 3316 for (pp = &mp->ports;
adc47037 3317 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 3318 pp = &p->next) {
eb1d1641
HX		 3319 if (timer_pending(&p->timer) ?
3320 time_after(p->timer.expires, now + max_delay) :
23550b83 3321 try_to_del_timer_sync(&p->timer) >= 0 &&
d3d065c0 3322 (brmctx->multicast_igmp_version == 2 ||
23550b83 3323 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 3324 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 3325 }
3326
3327out:
adc47037 3328 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 3329}
3330
dfd56b8b 3331#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3332static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx,
3333 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3334 struct sk_buff *skb,
3335 u16 vid)
08b202b6 3336{
ba5ea614 3337 unsigned int transport_len = ipv6_transport_len(skb);
eca2a43b 3338 struct mld_msg *mld;
08b202b6
YH		 3339 struct net_bridge_mdb_entry *mp;
3340 struct mld2_query *mld2q;
e8051688
ED		 3341 struct net_bridge_port_group *p;
3342 struct net_bridge_port_group __rcu **pp;
67b746f9 3343 struct br_ip saddr = {};
08b202b6
YH		 3344 unsigned long max_delay;
3345 unsigned long now = jiffies;
856ce5d0 3346 unsigned int offset = skb_transport_offset(skb);
b71d1d42 3347 const struct in6_addr *group = NULL;
9ed973cc 3348 bool is_general_query;
08b202b6
YH		 3349 int err = 0;
3350
adc47037 3351 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10 3352 if (!br_multicast_ctx_should_use(brmctx, pmctx))
08b202b6
YH		 3353 goto out;
3354
ba5ea614 3355 if (transport_len == sizeof(*mld)) {
856ce5d0 3356 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 3357 err = -EINVAL;
3358 goto out;
3359 }
3360 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 3361 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 3362 if (max_delay)
3363 group = &mld->mld_mca;
248ba8ec 3364 } else {
856ce5d0 3365 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 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;
d3d065c0 3372 if (brmctx->multicast_mld_version == 2 &&
23550b83
NA		 3373 !ipv6_addr_any(&mld2q->mld2q_mca) &&
3374 mld2q->mld2q_suppress)
3375 goto out;
e3f5b170
DB		 3376
3377 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 3378 }
3379
9ed973cc
LL		 3380 is_general_query = group && ipv6_addr_any(group);
3381
dc4eb53a
LL		 3382 if (is_general_query) {
3383 saddr.proto = htons(ETH_P_IPV6);
deb96566 3384 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
b00589af 3385
adc47037 3386 br_ip6_multicast_query_received(brmctx, pmctx,
d3d065c0 3387 &brmctx->ip6_other_query,
b19232ef 3388 &saddr, max_delay);
08b202b6 3389 goto out;
6c03ee8b
LL		 3390 } else if (!group) {
3391 goto out;
dc4eb53a 3392 }
08b202b6 3393
adc47037 3394 mp = br_mdb_ip6_get(brmctx->br, group, vid);
08b202b6
YH		 3395 if (!mp)
3396 goto out;
3397
d3d065c0 3398 max_delay *= brmctx->multicast_last_member_count;
ff0fd34e 3399 if (mp->host_joined &&
08b202b6
YH		 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
e8051688 3405 for (pp = &mp->ports;
adc47037 3406 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 3407 pp = &p->next) {
08b202b6
YH		 3408 if (timer_pending(&p->timer) ?
3409 time_after(p->timer.expires, now + max_delay) :
23550b83 3410 try_to_del_timer_sync(&p->timer) >= 0 &&
d3d065c0 3411 (brmctx->multicast_mld_version == 1 ||
23550b83 3412 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 3413 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 3414 }
3415
3416out:
adc47037 3417 spin_unlock(&brmctx->br->multicast_lock);
08b202b6
YH		 3418 return err;
3419}
3420#endif
3421
90010b36 3422static void
adc47037
NA		 3423br_multicast_leave_group(struct net_bridge_mcast *brmctx,
3424 struct net_bridge_mcast_port *pmctx,
90010b36
LL		 3425 struct br_ip *group,
3426 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 3427 struct bridge_mcast_own_query *own_query,
3428 const unsigned char *src)
eb1d1641 3429{
eb1d1641
HX		 3430 struct net_bridge_mdb_entry *mp;
3431 struct net_bridge_port_group *p;
3432 unsigned long now;
3433 unsigned long time;
3434
adc47037 3435 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10 3436 if (!br_multicast_ctx_should_use(brmctx, pmctx))
eb1d1641
HX		 3437 goto out;
3438
adc47037 3439 mp = br_mdb_ip_get(brmctx->br, group);
eb1d1641
HX		 3440 if (!mp)
3441 goto out;
3442
adc47037 3443 if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) {
544586f7
SA		 3444 struct net_bridge_port_group __rcu **pp;
3445
3446 for (pp = &mp->ports;
adc47037 3447 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
544586f7 3448 pp = &p->next) {
adc47037 3449 if (!br_port_group_equal(p, pmctx->port, src))
544586f7
SA		 3450 continue;
3451
5c725b6b
NA		 3452 if (p->flags & MDB_PG_FLAGS_PERMANENT)
3453 break;
3454
681590bd
NA		 3455 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
3456 br_multicast_del_pg(mp, p, pp);
544586f7
SA		 3457 }
3458 goto out;
3459 }
3460
3461 if (timer_pending(&other_query->timer))
3462 goto out;
3463
4d5b4e84 3464 if (brmctx->multicast_querier) {
adc47037 3465 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr,
42c11ccf 3466 false, 0, NULL);
6b7df111 3467
d3d065c0
NA		 3468 time = jiffies + brmctx->multicast_last_member_count *
3469 brmctx->multicast_last_member_interval;
cc0fdd80 3470
90010b36 3471 mod_timer(&own_query->timer, time);
6b7df111 3472
adc47037 3473 for (p = mlock_dereference(mp->ports, brmctx->br);
54cb4319 3474 p != NULL && pmctx != NULL;
adc47037
NA		 3475 p = mlock_dereference(p->next, brmctx->br)) {
3476 if (!br_port_group_equal(p, pmctx->port, src))
6b7df111
CW		 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
eb1d1641 3490 now = jiffies;
d3d065c0
NA		 3491 time = now + brmctx->multicast_last_member_count *
3492 brmctx->multicast_last_member_interval;
eb1d1641 3493
adc47037 3494 if (!pmctx) {
ff0fd34e 3495 if (mp->host_joined &&
eb1d1641
HX		 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);
eb1d1641 3500 }
454594f3
LL		 3501
3502 goto out;
3503 }
3504
adc47037 3505 for (p = mlock_dereference(mp->ports, brmctx->br);
454594f3 3506 p != NULL;
adc47037
NA		 3507 p = mlock_dereference(p->next, brmctx->br)) {
3508 if (p->key.port != pmctx->port)
454594f3
LL		 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;
eb1d1641 3519 }
eb1d1641 3520out:
adc47037 3521 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 3522}
3523
adc47037
NA		 3524static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
3525 struct net_bridge_mcast_port *pmctx,
b0e9a30d 3526 __be32 group,
6db6f0ea
FF		 3527 __u16 vid,
3528 const unsigned char *src)
8ef2a9a5
YH		 3529{
3530 struct br_ip br_group;
90010b36 3531 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 3532
3533 if (ipv4_is_local_multicast(group))
3534 return;
3535
adc47037 3536 own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query;
90010b36 3537
1515a63f 3538 memset(&br_group, 0, sizeof(br_group));
eab3227b 3539 br_group.dst.ip4 = group;
8ef2a9a5 3540 br_group.proto = htons(ETH_P_IP);
b0e9a30d 3541 br_group.vid = vid;
8ef2a9a5 3542
adc47037
NA		 3543 br_multicast_leave_group(brmctx, pmctx, &br_group,
3544 &brmctx->ip4_other_query,
6db6f0ea 3545 own_query, src);
8ef2a9a5
YH		 3546}
3547
dfd56b8b 3548#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3549static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
3550 struct net_bridge_mcast_port *pmctx,
b0e9a30d 3551 const struct in6_addr *group,
6db6f0ea
FF		 3552 __u16 vid,
3553 const unsigned char *src)
08b202b6
YH		 3554{
3555 struct br_ip br_group;
90010b36 3556 struct bridge_mcast_own_query *own_query;
08b202b6 3557
3c3769e6 3558 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 3559 return;
3560
adc47037 3561 own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query;
90010b36 3562
1515a63f 3563 memset(&br_group, 0, sizeof(br_group));
eab3227b 3564 br_group.dst.ip6 = *group;
08b202b6 3565 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 3566 br_group.vid = vid;
08b202b6 3567
adc47037
NA		 3568 br_multicast_leave_group(brmctx, pmctx, &br_group,
3569 &brmctx->ip6_other_query,
6db6f0ea 3570 own_query, src);
08b202b6
YH		 3571}
3572#endif
8ef2a9a5 3573
1080ab95
NA		 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
675779ad 3581 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 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
adc47037
NA		 3607static void br_multicast_pim(struct net_bridge_mcast *brmctx,
3608 struct net_bridge_mcast_port *pmctx,
91b02d3d
NA		 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
adc47037
NA		 3619 spin_lock(&brmctx->br->multicast_lock);
3620 br_ip4_multicast_mark_router(brmctx, pmctx);
3621 spin_unlock(&brmctx->br->multicast_lock);
91b02d3d
NA		 3622}
3623
adc47037
NA		 3624static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3625 struct net_bridge_mcast_port *pmctx,
4b3087c7
LL		 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
adc47037
NA		 3632 spin_lock(&brmctx->br->multicast_lock);
3633 br_ip4_multicast_mark_router(brmctx, pmctx);
3634 spin_unlock(&brmctx->br->multicast_lock);
4b3087c7
LL		 3635
3636 return 0;
3637}
3638
adc47037
NA		 3639static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
3640 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3641 struct sk_buff *skb,
3642 u16 vid)
eb1d1641 3643{
adc47037 3644 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
6db6f0ea 3645 const unsigned char *src;
eb1d1641 3646 struct igmphdr *ih;
eb1d1641
HX		 3647 int err;
3648
ba5ea614 3649 err = ip_mc_check_igmp(skb);
eb1d1641 3650
9afd85c9 3651 if (err == -ENOMSG) {
91b02d3d 3652 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 3653 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 3654 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3655 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
adc47037 3656 br_multicast_pim(brmctx, pmctx, skb);
4b3087c7 3657 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
adc47037 3658 br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb);
91b02d3d 3659 }
4b3087c7 3660
eb1d1641 3661 return 0;
9afd85c9 3662 } else if (err < 0) {
adc47037 3663 br_multicast_err_count(brmctx->br, p, skb->protocol);
9afd85c9 3664 return err;
bd4265fe 3665 }
eb1d1641 3666
9afd85c9 3667 ih = igmp_hdr(skb);
6db6f0ea 3668 src = eth_hdr(skb)->h_source;
1080ab95 3669 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
eb1d1641
HX		 3670
3671 switch (ih->type) {
3672 case IGMP_HOST_MEMBERSHIP_REPORT:
3673 case IGMPV2_HOST_MEMBERSHIP_REPORT:
62b2bcb4 3674 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
adc47037
NA		 3675 err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid,
3676 src, true);
eb1d1641
HX		 3677 break;
3678 case IGMPV3_HOST_MEMBERSHIP_REPORT:
adc47037 3679 err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid);
eb1d1641
HX		 3680 break;
3681 case IGMP_HOST_MEMBERSHIP_QUERY:
adc47037 3682 br_ip4_multicast_query(brmctx, pmctx, skb, vid);
eb1d1641
HX		 3683 break;
3684 case IGMP_HOST_LEAVE_MESSAGE:
adc47037 3685 br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src);
eb1d1641
HX		 3686 break;
3687 }
3688
adc47037 3689 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3690 BR_MCAST_DIR_RX);
3691
eb1d1641
HX		 3692 return err;
3693}
3694
dfd56b8b 3695#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3696static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3697 struct net_bridge_mcast_port *pmctx,
99014088 3698 struct sk_buff *skb)
4b3087c7 3699{
4b3087c7 3700 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
99014088 3701 return;
4b3087c7 3702
adc47037
NA		 3703 spin_lock(&brmctx->br->multicast_lock);
3704 br_ip6_multicast_mark_router(brmctx, pmctx);
3705 spin_unlock(&brmctx->br->multicast_lock);
4b3087c7
LL		 3706}
3707
adc47037
NA		 3708static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
3709 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3710 struct sk_buff *skb,
3711 u16 vid)
08b202b6 3712{
adc47037 3713 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
6db6f0ea 3714 const unsigned char *src;
9afd85c9 3715 struct mld_msg *mld;
08b202b6
YH		 3716 int err;
3717
ba5ea614 3718 err = ipv6_mc_check_mld(skb);
08b202b6 3719
99014088 3720 if (err == -ENOMSG || err == -ENODATA) {
9afd85c9
LL		 3721 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3722 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
99014088
LL		 3723 if (err == -ENODATA &&
3724 ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
adc47037 3725 br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
4b3087c7 3726
08b202b6 3727 return 0;
9afd85c9 3728 } else if (err < 0) {
adc47037 3729 br_multicast_err_count(brmctx->br, p, skb->protocol);
9afd85c9 3730 return err;
08b202b6
YH		 3731 }
3732
9afd85c9 3733 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 3734 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 3735
9afd85c9 3736 switch (mld->mld_type) {
08b202b6 3737 case ICMPV6_MGM_REPORT:
6db6f0ea 3738 src = eth_hdr(skb)->h_source;
fc2af6c7 3739 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
adc47037
NA		 3740 err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca,
3741 vid, src, true);
08b202b6 3742 break;
08b202b6 3743 case ICMPV6_MLD2_REPORT:
adc47037 3744 err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid);
08b202b6
YH		 3745 break;
3746 case ICMPV6_MGM_QUERY:
adc47037 3747 err = br_ip6_multicast_query(brmctx, pmctx, skb, vid);
08b202b6
YH		 3748 break;
3749 case ICMPV6_MGM_REDUCTION:
6db6f0ea 3750 src = eth_hdr(skb)->h_source;
adc47037
NA		 3751 br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid,
3752 src);
9afd85c9 3753 break;
08b202b6
YH		 3754 }
3755
adc47037 3756 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3757 BR_MCAST_DIR_RX);
3758
08b202b6
YH		 3759 return err;
3760}
3761#endif
3762
f4b7002a
NA		 3763int br_multicast_rcv(struct net_bridge_mcast **brmctx,
3764 struct net_bridge_mcast_port **pmctx,
3765 struct net_bridge_vlan *vlan,
06499098 3766 struct sk_buff *skb, u16 vid)
eb1d1641 3767{
1080ab95
NA		 3768 int ret = 0;
3769
1fafc7a9
YH		 3770 BR_INPUT_SKB_CB(skb)->igmp = 0;
3771 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3772
f4b7002a 3773 if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 3774 return 0;
3775
f4b7002a
NA		 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
eb1d1641
HX		 3796 switch (skb->protocol) {
3797 case htons(ETH_P_IP):
f4b7002a 3798 ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid);
1080ab95 3799 break;
dfd56b8b 3800#if IS_ENABLED(CONFIG_IPV6)
08b202b6 3801 case htons(ETH_P_IPV6):
f4b7002a 3802 ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid);
1080ab95 3803 break;
08b202b6 3804#endif
eb1d1641
HX		 3805 }
3806
1080ab95 3807 return ret;
eb1d1641
HX		 3808}
3809
adc47037 3810static void br_multicast_query_expired(struct net_bridge_mcast *brmctx,
2cd41431
LL		 3811 struct bridge_mcast_own_query *query,
3812 struct bridge_mcast_querier *querier)
cc0fdd80 3813{
adc47037 3814 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10
NA		 3815 if (br_multicast_ctx_vlan_disabled(brmctx))
3816 goto out;
3817
adc47037 3818 if (query->startup_sent < brmctx->multicast_startup_query_count)
cc0fdd80
LL		 3819 query->startup_sent++;
3820
adc47037 3821 br_multicast_send_query(brmctx, NULL, query);
4cdd0d10 3822out:
adc47037 3823 spin_unlock(&brmctx->br->multicast_lock);
cc0fdd80
LL		 3824}
3825
88c1f37f 3826static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 3827{
d3d065c0
NA		 3828 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
3829 ip4_own_query.timer);
eb1d1641 3830
adc47037 3831 br_multicast_query_expired(brmctx, &brmctx->ip4_own_query,
d3d065c0 3832 &brmctx->ip4_querier);
cc0fdd80 3833}
eb1d1641 3834
cc0fdd80 3835#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 3836static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 3837{
d3d065c0
NA		 3838 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
3839 ip6_own_query.timer);
eb1d1641 3840
adc47037 3841 br_multicast_query_expired(brmctx, &brmctx->ip6_own_query,
d3d065c0 3842 &brmctx->ip6_querier);
eb1d1641 3843}
cc0fdd80 3844#endif
eb1d1641 3845
e12cec65 3846static void br_multicast_gc_work(struct work_struct *work)
8b671779
NA		 3847{
3848 struct net_bridge *br = container_of(work, struct net_bridge,
e12cec65 3849 mcast_gc_work);
8b671779
NA		 3850 HLIST_HEAD(deleted_head);
3851
3852 spin_lock_bh(&br->multicast_lock);
e12cec65 3853 hlist_move_list(&br->mcast_gc_list, &deleted_head);
8b671779
NA		 3854 spin_unlock_bh(&br->multicast_lock);
3855
e12cec65 3856 br_multicast_gc(&deleted_head);
8b671779
NA		 3857}
3858
613d61db
NA		 3859void br_multicast_ctx_init(struct net_bridge *br,
3860 struct net_bridge_vlan *vlan,
3861 struct net_bridge_mcast *brmctx)
eb1d1641 3862{
613d61db
NA		 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;
eb1d1641 3868
613d61db
NA		 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;
bb18ef8e 3877 brmctx->ip4_querier.port_ifidx = 0;
f936bb42 3878 seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock);
613d61db 3879 brmctx->multicast_igmp_version = 2;
cc0fdd80 3880#if IS_ENABLED(CONFIG_IPV6)
613d61db
NA		 3881 brmctx->multicast_mld_version = 1;
3882 brmctx->ip6_other_query.delay_time = 0;
bb18ef8e 3883 brmctx->ip6_querier.port_ifidx = 0;
f936bb42 3884 seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock);
cc0fdd80 3885#endif
b00589af 3886
613d61db 3887 timer_setup(&brmctx->ip4_mc_router_timer,
ee5fb222 3888 br_ip4_multicast_local_router_expired, 0);
613d61db 3889 timer_setup(&brmctx->ip4_other_query.timer,
88c1f37f 3890 br_ip4_multicast_querier_expired, 0);
613d61db 3891 timer_setup(&brmctx->ip4_own_query.timer,
88c1f37f 3892 br_ip4_multicast_query_expired, 0);
cc0fdd80 3893#if IS_ENABLED(CONFIG_IPV6)
613d61db 3894 timer_setup(&brmctx->ip6_mc_router_timer,
a3c02e76 3895 br_ip6_multicast_local_router_expired, 0);
613d61db 3896 timer_setup(&brmctx->ip6_other_query.timer,
88c1f37f 3897 br_ip6_multicast_querier_expired, 0);
613d61db 3898 timer_setup(&brmctx->ip6_own_query.timer,
88c1f37f 3899 br_ip6_multicast_query_expired, 0);
cc0fdd80 3900#endif
613d61db
NA		 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);
19e3a9c9 3918 INIT_HLIST_HEAD(&br->mdb_list);
e12cec65
NA		 3919 INIT_HLIST_HEAD(&br->mcast_gc_list);
3920 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
eb1d1641
HX		 3921}
3922
4effd28c
LL		 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
9fb20801 3930 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 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
851d0a73 3948void br_multicast_join_snoopers(struct net_bridge *br)
4effd28c
LL		 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
9fb20801 3961 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 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
851d0a73 3979void br_multicast_leave_snoopers(struct net_bridge *br)
4effd28c
LL		 3980{
3981 br_ip4_multicast_leave_snoopers(br);
3982 br_ip6_multicast_leave_snoopers(br);
3983}
3984
7b54aaaf
NA		 3985static void __br_multicast_open_query(struct net_bridge *br,
3986 struct bridge_mcast_own_query *query)
eb1d1641 3987{
cc0fdd80 3988 query->startup_sent = 0;
eb1d1641 3989
13cefad2 3990 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 3991 return;
3992
cc0fdd80
LL		 3993 mod_timer(&query->timer, jiffies);
3994}
3995
7b54aaaf 3996static void __br_multicast_open(struct net_bridge_mcast *brmctx)
cc0fdd80 3997{
7b54aaaf 3998 __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query);
cc0fdd80 3999#if IS_ENABLED(CONFIG_IPV6)
7b54aaaf 4000 __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query);
cc0fdd80 4001#endif
eb1d1641
HX		 4002}
4003
7b54aaaf
NA		 4004void br_multicast_open(struct net_bridge *br)
4005{
7b54aaaf
NA		 4006 ASSERT_RTNL();
4007
f4b7002a
NA		 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 }
7b54aaaf 4022 }
cb486ce9
NA		 4023 } else {
4024 __br_multicast_open(&br->multicast_ctx);
7b54aaaf 4025 }
7b54aaaf
NA		 4026}
4027
613d61db 4028static void __br_multicast_stop(struct net_bridge_mcast *brmctx)
eb1d1641 4029{
613d61db
NA		 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);
cc0fdd80 4033#if IS_ENABLED(CONFIG_IPV6)
613d61db
NA		 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);
cc0fdd80 4037#endif
e10177ab
SA		 4038}
4039
7b54aaaf
NA		 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
affce9a7 4085static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on)
f4b7002a
NA		 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 }
affce9a7
NA		 4100
4101 if (br_vlan_is_brentry(vlan))
4102 br_multicast_toggle_one_vlan(vlan, on);
f4b7002a
NA		 4103}
4104
4105int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
4106 struct netlink_ext_ack *extack)
613d61db 4107{
7b54aaaf
NA		 4108 struct net_bridge_vlan_group *vg;
4109 struct net_bridge_vlan *vlan;
f4b7002a 4110 struct net_bridge_port *p;
7b54aaaf 4111
f4b7002a
NA		 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 }
7b54aaaf
NA		 4119
4120 vg = br_vlan_group(br);
f4b7002a
NA		 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
9dee572c
NA		 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
f4b7002a
NA		 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 }
7b54aaaf 4178 }
cb486ce9
NA		 4179 } else {
4180 __br_multicast_stop(&br->multicast_ctx);
7b54aaaf 4181 }
613d61db
NA		 4182}
4183
e10177ab
SA		 4184void br_multicast_dev_del(struct net_bridge *br)
4185{
e10177ab 4186 struct net_bridge_mdb_entry *mp;
8b671779 4187 HLIST_HEAD(deleted_head);
19e3a9c9 4188 struct hlist_node *tmp;
eb1d1641
HX		 4189
4190 spin_lock_bh(&br->multicast_lock);
e12cec65
NA		 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);
eb1d1641 4194 spin_unlock_bh(&br->multicast_lock);
19e3a9c9 4195
613d61db 4196 br_multicast_ctx_deinit(&br->multicast_ctx);
e12cec65
NA		 4197 br_multicast_gc(&deleted_head);
4198 cancel_work_sync(&br->mcast_gc_work);
8b671779 4199
4329596c 4200 rcu_barrier();
eb1d1641 4201}
0909e117 4202
a97df080 4203int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val)
0909e117 4204{
6ae4ae8e 4205 int err = -EINVAL;
0909e117 4206
a97df080 4207 spin_lock_bh(&brmctx->br->multicast_lock);
0909e117
HX		 4208
4209 switch (val) {
7f0aec7a
NA		 4210 case MDB_RTR_TYPE_DISABLED:
4211 case MDB_RTR_TYPE_PERM:
a97df080 4212 br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM);
d3d065c0 4213 del_timer(&brmctx->ip4_mc_router_timer);
a3c02e76 4214#if IS_ENABLED(CONFIG_IPV6)
d3d065c0 4215 del_timer(&brmctx->ip6_mc_router_timer);
a3c02e76 4216#endif
d3d065c0 4217 brmctx->multicast_router = val;
77041420
YG		 4218 err = 0;
4219 break;
7f0aec7a 4220 case MDB_RTR_TYPE_TEMP_QUERY:
d3d065c0 4221 if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
a97df080 4222 br_mc_router_state_change(brmctx->br, false);
d3d065c0 4223 brmctx->multicast_router = val;
0909e117
HX		 4224 err = 0;
4225 break;
0909e117
HX		 4226 }
4227
a97df080 4228 spin_unlock_bh(&brmctx->br->multicast_lock);
0909e117
HX		 4229
4230 return err;
4231}
4232
ed2d3597 4233static void
adc47037 4234br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted)
7f0aec7a 4235{
ed2d3597 4236 if (!deleted)
7f0aec7a 4237 return;
ed2d3597 4238
a3c02e76
LL		 4239 /* For backwards compatibility for now, only notify if there is
4240 * no multicast router anymore for both IPv4 and IPv6.
4241 */
adc47037 4242 if (!hlist_unhashed(&pmctx->ip4_rlist))
a3c02e76
LL		 4243 return;
4244#if IS_ENABLED(CONFIG_IPV6)
adc47037 4245 if (!hlist_unhashed(&pmctx->ip6_rlist))
a3c02e76
LL		 4246 return;
4247#endif
4248
1e9ca456 4249 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB);
adc47037 4250 br_port_mc_router_state_change(pmctx->port, false);
f12e7d95
NF		 4251
4252 /* don't allow timer refresh */
adc47037
NA		 4253 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP)
4254 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 4255}
4256
a53581d5
NA		 4257int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
4258 unsigned long val)
0909e117 4259{
a53581d5 4260 struct net_bridge_mcast *brmctx;
a55d8246 4261 unsigned long now = jiffies;
6ae4ae8e 4262 int err = -EINVAL;
ed2d3597 4263 bool del = false;
0909e117 4264
a53581d5 4265 brmctx = br_multicast_port_ctx_get_global(pmctx);
ddd0d529 4266 spin_lock_bh(&brmctx->br->multicast_lock);
adc47037 4267 if (pmctx->multicast_router == val) {
a55d8246 4268 /* Refresh the temp router port timer */
adc47037
NA		 4269 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) {
4270 mod_timer(&pmctx->ip4_mc_router_timer,
d3d065c0 4271 now + brmctx->multicast_querier_interval);
a3c02e76 4272#if IS_ENABLED(CONFIG_IPV6)
adc47037 4273 mod_timer(&pmctx->ip6_mc_router_timer,
d3d065c0 4274 now + brmctx->multicast_querier_interval);
a3c02e76
LL		 4275#endif
4276 }
4950cfd1
NA		 4277 err = 0;
4278 goto unlock;
4279 }
0909e117 4280 switch (val) {
7f0aec7a 4281 case MDB_RTR_TYPE_DISABLED:
adc47037
NA		 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);
a3c02e76 4286#if IS_ENABLED(CONFIG_IPV6)
adc47037 4287 del_timer(&pmctx->ip6_mc_router_timer);
a3c02e76 4288#endif
adc47037 4289 br_multicast_rport_del_notify(pmctx, del);
7f0aec7a
NA		 4290 break;
4291 case MDB_RTR_TYPE_TEMP_QUERY:
adc47037
NA		 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);
7f0aec7a
NA		 4296 break;
4297 case MDB_RTR_TYPE_PERM:
adc47037
NA		 4298 pmctx->multicast_router = MDB_RTR_TYPE_PERM;
4299 del_timer(&pmctx->ip4_mc_router_timer);
4300 br_ip4_multicast_add_router(brmctx, pmctx);
a3c02e76 4301#if IS_ENABLED(CONFIG_IPV6)
adc47037 4302 del_timer(&pmctx->ip6_mc_router_timer);
a3c02e76 4303#endif
adc47037 4304 br_ip6_multicast_add_router(brmctx, pmctx);
0909e117 4305 break;
a55d8246 4306 case MDB_RTR_TYPE_TEMP:
adc47037
NA		 4307 pmctx->multicast_router = MDB_RTR_TYPE_TEMP;
4308 br_ip4_multicast_mark_router(brmctx, pmctx);
4309 br_ip6_multicast_mark_router(brmctx, pmctx);
a55d8246 4310 break;
7f0aec7a
NA		 4311 default:
4312 goto unlock;
0909e117 4313 }
7f0aec7a
NA		 4314 err = 0;
4315unlock:
ddd0d529 4316 spin_unlock_bh(&brmctx->br->multicast_lock);
0909e117
HX		 4317
4318 return err;
4319}
561f1103 4320
2796d846
NA		 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
adc47037 4334static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
90010b36 4335 struct bridge_mcast_own_query *query)
561f1103
HX		 4336{
4337 struct net_bridge_port *port;
74857216 4338
cb486ce9
NA		 4339 if (!br_multicast_ctx_matches_vlan_snooping(brmctx))
4340 return;
4341
7b54aaaf 4342 __br_multicast_open_query(brmctx->br, query);
74857216 4343
c5b493ce 4344 rcu_read_lock();
adc47037 4345 list_for_each_entry_rcu(port, &brmctx->br->port_list, list) {
615cc23e
NA		 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))
74857216
HX		 4352 continue;
4353
615cc23e
NA		 4354 if (br_multicast_ctx_is_vlan(brmctx)) {
4355 struct net_bridge_vlan *vlan;
4356
3f0d14ef
NA		 4357 vlan = br_vlan_find(nbp_vlan_group_rcu(port),
4358 brmctx->vlan->vid);
615cc23e
NA		 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
adc47037 4374 if (query == &brmctx->ip4_own_query)
615cc23e 4375 br_multicast_enable(ip4_own_query);
cc0fdd80
LL		 4376#if IS_ENABLED(CONFIG_IPV6)
4377 else
615cc23e 4378 br_multicast_enable(ip6_own_query);
cc0fdd80 4379#endif
74857216 4380 }
c5b493ce 4381 rcu_read_unlock();
74857216
HX		 4382}
4383
ae1ea84b
FF		 4384int br_multicast_toggle(struct net_bridge *br, unsigned long val,
4385 struct netlink_ext_ack *extack)
74857216 4386{
7cb3f921 4387 struct net_bridge_port *port;
851d0a73 4388 bool change_snoopers = false;
ae1ea84b 4389 int err = 0;
561f1103 4390
ef5e0d82 4391 spin_lock_bh(&br->multicast_lock);
13cefad2 4392 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 4393 goto unlock;
4394
ae1ea84b
FF		 4395 err = br_mc_disabled_update(br->dev, val, extack);
4396 if (err == -EOPNOTSUPP)
4397 err = 0;
4398 if (err)
4399 goto unlock;
4400
13cefad2 4401 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4effd28c 4402 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
851d0a73 4403 change_snoopers = true;
561f1103 4404 goto unlock;
4effd28c 4405 }
561f1103 4406
3a7fda06
HX		 4407 if (!netif_running(br->dev))
4408 goto unlock;
4409
7cb3f921
NA		 4410 br_multicast_open(br);
4411 list_for_each_entry(port, &br->port_list, list)
adc47037 4412 __br_multicast_enable_port_ctx(&port->multicast_ctx);
561f1103 4413
851d0a73
JH		 4414 change_snoopers = true;
4415
561f1103 4416unlock:
ef5e0d82 4417 spin_unlock_bh(&br->multicast_lock);
561f1103 4418
851d0a73
JH		 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
ae1ea84b 4438 return err;
561f1103 4439}
b195167f 4440
9341b988
IS		 4441bool br_multicast_enabled(const struct net_device *dev)
4442{
4443 struct net_bridge *br = netdev_priv(dev);
4444
13cefad2 4445 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 4446}
4447EXPORT_SYMBOL_GPL(br_multicast_enabled);
4448
0912bda4
YG		 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);
adc47037 4455 is_router = br_multicast_is_router(&br->multicast_ctx, NULL);
0912bda4
YG		 4456 spin_unlock_bh(&br->multicast_lock);
4457 return is_router;
4458}
4459EXPORT_SYMBOL_GPL(br_multicast_router);
4460
62938182 4461int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val)
c5c23260 4462{
b00589af
LL		 4463 unsigned long max_delay;
4464
c5c23260
HX		 4465 val = !!val;
4466
62938182 4467 spin_lock_bh(&brmctx->br->multicast_lock);
4d5b4e84 4468 if (brmctx->multicast_querier == val)
c5c23260
HX		 4469 goto unlock;
4470
4d5b4e84 4471 WRITE_ONCE(brmctx->multicast_querier, val);
b00589af
LL		 4472 if (!val)
4473 goto unlock;
4474
d3d065c0 4475 max_delay = brmctx->multicast_query_response_interval;
b00589af 4476
d3d065c0
NA		 4477 if (!timer_pending(&brmctx->ip4_other_query.timer))
4478 brmctx->ip4_other_query.delay_time = jiffies + max_delay;
cc0fdd80 4479
adc47037 4480 br_multicast_start_querier(brmctx, &brmctx->ip4_own_query);
cc0fdd80
LL		 4481
4482#if IS_ENABLED(CONFIG_IPV6)
d3d065c0
NA		 4483 if (!timer_pending(&brmctx->ip6_other_query.timer))
4484 brmctx->ip6_other_query.delay_time = jiffies + max_delay;
cc0fdd80 4485
adc47037 4486 br_multicast_start_querier(brmctx, &brmctx->ip6_own_query);
cc0fdd80 4487#endif
c5c23260
HX		 4488
4489unlock:
62938182 4490 spin_unlock_bh(&brmctx->br->multicast_lock);
c5c23260
HX		 4491
4492 return 0;
4493}
4494
df271cd6
NA		 4495int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
4496 unsigned long val)
5e923585
NA		 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
df271cd6
NA		 4507 spin_lock_bh(&brmctx->br->multicast_lock);
4508 brmctx->multicast_igmp_version = val;
4509 spin_unlock_bh(&brmctx->br->multicast_lock);
5e923585
NA		 4510
4511 return 0;
4512}
4513
aa2ae3e7 4514#if IS_ENABLED(CONFIG_IPV6)
df271cd6
NA		 4515int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
4516 unsigned long val)
aa2ae3e7
NA		 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
df271cd6
NA		 4527 spin_lock_bh(&brmctx->br->multicast_lock);
4528 brmctx->multicast_mld_version = val;
4529 spin_unlock_bh(&brmctx->br->multicast_lock);
aa2ae3e7
NA		 4530
4531 return 0;
4532}
4533#endif
4534
99b40610
NA		 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
f83a112b
NA		 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
07f8ac4a
LL		 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();
35f861e3 4594 if (!br_ip_list || !netif_is_bridge_port(dev))
07f8ac4a
LL		 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
085b53c8 4612 entry->addr = group->key.addr;
07f8ac4a
LL		 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);
2cd41431 4623
c34963e2
LL		 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();
35f861e3 4641 if (!netif_is_bridge_port(dev))
c34963e2
LL		 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(&eth, 0, sizeof(eth));
4651 eth.h_proto = htons(proto);
4652
adc47037 4653 ret = br_multicast_querier_exists(&br->multicast_ctx, &eth, NULL);
c34963e2
LL		 4654
4655unlock:
4656 rcu_read_unlock();
4657 return ret;
4658}
4659EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
4660
2cd41431
LL		 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{
d3d065c0 4672 struct net_bridge_mcast *brmctx;
2cd41431
LL		 4673 struct net_bridge *br;
4674 struct net_bridge_port *port;
4675 bool ret = false;
bb18ef8e 4676 int port_ifidx;
2cd41431
LL		 4677
4678 rcu_read_lock();
35f861e3 4679 if (!netif_is_bridge_port(dev))
2cd41431
LL		 4680 goto unlock;
4681
4682 port = br_port_get_rcu(dev);
4683 if (!port || !port->br)
4684 goto unlock;
4685
4686 br = port->br;
d3d065c0 4687 brmctx = &br->multicast_ctx;
2cd41431
LL		 4688
4689 switch (proto) {
4690 case ETH_P_IP:
bb18ef8e 4691 port_ifidx = brmctx->ip4_querier.port_ifidx;
d3d065c0 4692 if (!timer_pending(&brmctx->ip4_other_query.timer) ||
bb18ef8e 4693 port_ifidx == port->dev->ifindex)
2cd41431
LL		 4694 goto unlock;
4695 break;
3993c4e1 4696#if IS_ENABLED(CONFIG_IPV6)
2cd41431 4697 case ETH_P_IPV6:
bb18ef8e 4698 port_ifidx = brmctx->ip6_querier.port_ifidx;
d3d065c0 4699 if (!timer_pending(&brmctx->ip6_other_query.timer) ||
bb18ef8e 4700 port_ifidx == port->dev->ifindex)
2cd41431
LL		 4701 goto unlock;
4702 break;
3993c4e1 4703#endif
2cd41431
LL		 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);
1080ab95 4714
3b85f9ba
LL		 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{
9632233e 4726 struct net_bridge_mcast_port *pmctx;
d3d065c0 4727 struct net_bridge_mcast *brmctx;
9632233e 4728 struct net_bridge_port *port;
3b85f9ba
LL		 4729 bool ret = false;
4730
4731 rcu_read_lock();
4732 port = br_port_get_check_rcu(dev);
4733 if (!port)
4734 goto unlock;
4735
d3d065c0 4736 brmctx = &port->br->multicast_ctx;
3b85f9ba
LL		 4737 switch (proto) {
4738 case ETH_P_IP:
d3d065c0 4739 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
3b85f9ba 4740 ip4_rlist) {
9632233e 4741 if (pmctx->port == port)
3b85f9ba
LL		 4742 continue;
4743
4744 ret = true;
4745 goto unlock;
4746 }
4747 break;
4748#if IS_ENABLED(CONFIG_IPV6)
4749 case ETH_P_IPV6:
d3d065c0 4750 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
3b85f9ba 4751 ip6_rlist) {
9632233e 4752 if (pmctx->port == port)
3b85f9ba
LL		 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
1080ab95 4773static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 4774 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 4775{
4776 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 4777 __be16 proto = skb->protocol;
4778 unsigned int t_len;
1080ab95
NA		 4779
4780 u64_stats_update_begin(&pstats->syncp);
4781 switch (proto) {
4782 case htons(ETH_P_IP):
a65056ec 4783 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 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:
a65056ec
NA		 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 }
1080ab95
NA		 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):
a65056ec
NA		 4818 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
4819 sizeof(struct ipv6hdr);
4820 t_len -= skb_network_header_len(skb);
1080ab95
NA		 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:
a65056ec
NA		 4829 if (t_len != sizeof(struct mld_msg))
4830 pstats->mstats.mld_v2queries[dir]++;
4831 else
4832 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 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
adc47037
NA		 4844void br_multicast_count(struct net_bridge *br,
4845 const struct net_bridge_port *p,
a65056ec 4846 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 4847{
4848 struct bridge_mcast_stats __percpu *stats;
4849
4850 /* if multicast_disabled is true then igmp type can't be set */
675779ad 4851 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 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
a65056ec 4861 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 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
b6fe0440
IS		 4873void br_multicast_uninit_stats(struct net_bridge *br)
4874{
4875 free_percpu(br->mcast_stats);
4876}
4877
b3b6a84c
AB		 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)
1080ab95
NA		 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 {
d120d1a6 4908 start = u64_stats_fetch_begin(&cpu_stats->syncp);
1080ab95 4909 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
d120d1a6 4910 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
1080ab95 4911
a65056ec
NA		 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);
1080ab95
NA		 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
a65056ec
NA		 4921 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
4922 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 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}
19e3a9c9
NA		 4930
4931int br_mdb_hash_init(struct net_bridge *br)
4932{
085b53c8
NA		 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;
19e3a9c9
NA		 4946}
4947
4948void br_mdb_hash_fini(struct net_bridge *br)
4949{
085b53c8 4950 rhashtable_destroy(&br->sg_port_tbl);
19e3a9c9
NA		 4951 rhashtable_destroy(&br->mdb_hash_tbl);
4952}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git