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bridge: mcast: fix disabled snooping after long uptime
[thirdparty/kernel/stable.git] / net / bridge / br_multicast.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
eb1d1641
HX		 2/*
3 * Bridge multicast support.
4 *
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
eb1d1641
HX		 6 */
7
8#include <linux/err.h>
07f8ac4a 9#include <linux/export.h>
eb1d1641
HX		 10#include <linux/if_ether.h>
11#include <linux/igmp.h>
4b3087c7 12#include <linux/in.h>
eb1d1641
HX		 13#include <linux/jhash.h>
14#include <linux/kernel.h>
b195167f 15#include <linux/log2.h>
eb1d1641
HX		 16#include <linux/netdevice.h>
17#include <linux/netfilter_bridge.h>
18#include <linux/random.h>
19#include <linux/rculist.h>
20#include <linux/skbuff.h>
21#include <linux/slab.h>
22#include <linux/timer.h>
1c8ad5bf 23#include <linux/inetdevice.h>
91b02d3d 24#include <linux/mroute.h>
eb1d1641 25#include <net/ip.h>
147c1e9b 26#include <net/switchdev.h>
dfd56b8b 27#if IS_ENABLED(CONFIG_IPV6)
4b3087c7 28#include <linux/icmpv6.h>
08b202b6
YH		 29#include <net/ipv6.h>
30#include <net/mld.h>
d4c4f07d 31#include <net/ip6_checksum.h>
3c3769e6 32#include <net/addrconf.h>
08b202b6 33#endif
b57e8d87 34#include <trace/events/bridge.h>
eb1d1641
HX		 35
36#include "br_private.h"
8f07b831 37#include "br_private_mcast_eht.h"
eb1d1641 38
19e3a9c9
NA		 39static const struct rhashtable_params br_mdb_rht_params = {
40 .head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
41 .key_offset = offsetof(struct net_bridge_mdb_entry, addr),
42 .key_len = sizeof(struct br_ip),
43 .automatic_shrinking = true,
19e3a9c9
NA		 44};
45
085b53c8
NA		 46static const struct rhashtable_params br_sg_port_rht_params = {
47 .head_offset = offsetof(struct net_bridge_port_group, rhnode),
48 .key_offset = offsetof(struct net_bridge_port_group, key),
49 .key_len = sizeof(struct net_bridge_port_group_sg_key),
50 .automatic_shrinking = true,
51};
52
adc47037 53static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
90010b36 54 struct bridge_mcast_own_query *query);
adc47037
NA		 55static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
56 struct net_bridge_mcast_port *pmctx);
57static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
58 struct net_bridge_mcast_port *pmctx,
bc8c20ac 59 __be32 group,
6db6f0ea
FF		 60 __u16 vid,
61 const unsigned char *src);
42c11ccf 62static void br_multicast_port_group_rexmit(struct timer_list *t);
6db6f0ea 63
ed2d3597 64static void
adc47037
NA		 65br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted);
66static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
67 struct net_bridge_mcast_port *pmctx);
30515832 68#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 69static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
70 struct net_bridge_mcast_port *pmctx,
bc8c20ac 71 const struct in6_addr *group,
6db6f0ea 72 __u16 vid, const unsigned char *src);
bc8c20ac 73#endif
b0812368 74static struct net_bridge_port_group *
adc47037
NA		 75__br_multicast_add_group(struct net_bridge_mcast *brmctx,
76 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 77 struct br_ip *group,
78 const unsigned char *src,
79 u8 filter_mode,
9116ffbf
NA		 80 bool igmpv2_mldv1,
81 bool blocked);
8266a049
NA		 82static void br_multicast_find_del_pg(struct net_bridge *br,
83 struct net_bridge_port_group *pg);
613d61db 84static void __br_multicast_stop(struct net_bridge_mcast *brmctx);
c83b8fab 85
c832962a
OM		 86static int br_mc_disabled_update(struct net_device *dev, bool value,
87 struct netlink_ext_ack *extack);
88
085b53c8
NA		 89static struct net_bridge_port_group *
90br_sg_port_find(struct net_bridge *br,
91 struct net_bridge_port_group_sg_key *sg_p)
92{
93 lockdep_assert_held_once(&br->multicast_lock);
94
95 return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
96 br_sg_port_rht_params);
97}
98
19e3a9c9
NA		 99static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
100 struct br_ip *dst)
08b202b6 101{
19e3a9c9 102 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
08b202b6 103}
08b202b6 104
19e3a9c9
NA		 105struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
106 struct br_ip *dst)
eb1d1641 107{
19e3a9c9 108 struct net_bridge_mdb_entry *ent;
eb1d1641 109
19e3a9c9 110 lockdep_assert_held_once(&br->multicast_lock);
eb1d1641 111
19e3a9c9
NA		 112 rcu_read_lock();
113 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
114 rcu_read_unlock();
7f285fa7 115
19e3a9c9 116 return ent;
7f285fa7
HX		 117}
118
19e3a9c9
NA		 119static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
120 __be32 dst, __u16 vid)
eb1d1641 121{
8ef2a9a5
YH		 122 struct br_ip br_dst;
123
19e3a9c9 124 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 125 br_dst.dst.ip4 = dst;
8ef2a9a5 126 br_dst.proto = htons(ETH_P_IP);
b0e9a30d 127 br_dst.vid = vid;
0821ec55 128
19e3a9c9 129 return br_mdb_ip_get(br, &br_dst);
8ef2a9a5
YH		 130}
131
dfd56b8b 132#if IS_ENABLED(CONFIG_IPV6)
19e3a9c9
NA		 133static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
134 const struct in6_addr *dst,
135 __u16 vid)
08b202b6
YH		 136{
137 struct br_ip br_dst;
0821ec55 138
19e3a9c9 139 memset(&br_dst, 0, sizeof(br_dst));
eab3227b 140 br_dst.dst.ip6 = *dst;
08b202b6 141 br_dst.proto = htons(ETH_P_IPV6);
b0e9a30d 142 br_dst.vid = vid;
08b202b6 143
19e3a9c9 144 return br_mdb_ip_get(br, &br_dst);
08b202b6
YH		 145}
146#endif
147
6d0259dd
IS		 148struct net_bridge_mdb_entry *
149br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
150 u16 vid)
eb1d1641 151{
adc47037 152 struct net_bridge *br = brmctx->br;
8ef2a9a5
YH		 153 struct br_ip ip;
154
4cdd0d10
NA		 155 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
156 br_multicast_ctx_vlan_global_disabled(brmctx))
eb1d1641
HX		 157 return NULL;
158
8ef2a9a5 159 if (BR_INPUT_SKB_CB(skb)->igmp)
eb1d1641
HX		 160 return NULL;
161
19e3a9c9 162 memset(&ip, 0, sizeof(ip));
8ef2a9a5 163 ip.proto = skb->protocol;
fbca58a2 164 ip.vid = vid;
8ef2a9a5 165
eb1d1641
HX		 166 switch (skb->protocol) {
167 case htons(ETH_P_IP):
eab3227b 168 ip.dst.ip4 = ip_hdr(skb)->daddr;
adc47037 169 if (brmctx->multicast_igmp_version == 3) {
7d07a68c
NA		 170 struct net_bridge_mdb_entry *mdb;
171
172 ip.src.ip4 = ip_hdr(skb)->saddr;
173 mdb = br_mdb_ip_get_rcu(br, &ip);
174 if (mdb)
175 return mdb;
176 ip.src.ip4 = 0;
177 }
8ef2a9a5 178 break;
dfd56b8b 179#if IS_ENABLED(CONFIG_IPV6)
08b202b6 180 case htons(ETH_P_IPV6):
eab3227b 181 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
adc47037 182 if (brmctx->multicast_mld_version == 2) {
7d07a68c
NA		 183 struct net_bridge_mdb_entry *mdb;
184
185 ip.src.ip6 = ipv6_hdr(skb)->saddr;
186 mdb = br_mdb_ip_get_rcu(br, &ip);
187 if (mdb)
188 return mdb;
189 memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
190 }
08b202b6
YH		 191 break;
192#endif
8ef2a9a5 193 default:
955062b0
NA		 194 ip.proto = 0;
195 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
eb1d1641
HX		 196 }
197
19e3a9c9 198 return br_mdb_ip_get_rcu(br, &ip);
eb1d1641
HX		 199}
200
74edfd48
NA		 201/* IMPORTANT: this function must be used only when the contexts cannot be
202 * passed down (e.g. timer) and must be used for read-only purposes because
203 * the vlan snooping option can change, so it can return any context
204 * (non-vlan or vlan). Its initial intended purpose is to read timer values
205 * from the *current* context based on the option. At worst that could lead
206 * to inconsistent timers when the contexts are changed, i.e. src timer
207 * which needs to re-arm with a specific delay taken from the old context
208 */
209static struct net_bridge_mcast_port *
210br_multicast_pg_to_port_ctx(const struct net_bridge_port_group *pg)
211{
212 struct net_bridge_mcast_port *pmctx = &pg->key.port->multicast_ctx;
213 struct net_bridge_vlan *vlan;
214
215 lockdep_assert_held_once(&pg->key.port->br->multicast_lock);
216
217 /* if vlan snooping is disabled use the port's multicast context */
218 if (!pg->key.addr.vid ||
219 !br_opt_get(pg->key.port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED))
220 goto out;
221
222 /* locking is tricky here, due to different rules for multicast and
223 * vlans we need to take rcu to find the vlan and make sure it has
224 * the BR_VLFLAG_MCAST_ENABLED flag set, it can only change under
225 * multicast_lock which must be already held here, so the vlan's pmctx
226 * can safely be used on return
227 */
228 rcu_read_lock();
3f0d14ef 229 vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid);
74edfd48
NA		 230 if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx))
231 pmctx = &vlan->port_mcast_ctx;
232 else
233 pmctx = NULL;
234 rcu_read_unlock();
235out:
236 return pmctx;
237}
238
b57e8d87
PM		 239static struct net_bridge_mcast_port *
240br_multicast_port_vid_to_port_ctx(struct net_bridge_port *port, u16 vid)
241{
242 struct net_bridge_mcast_port *pmctx = NULL;
243 struct net_bridge_vlan *vlan;
244
245 lockdep_assert_held_once(&port->br->multicast_lock);
246
247 if (!br_opt_get(port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED))
248 return NULL;
249
250 /* Take RCU to access the vlan. */
251 rcu_read_lock();
252
253 vlan = br_vlan_find(nbp_vlan_group_rcu(port), vid);
254 if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx))
255 pmctx = &vlan->port_mcast_ctx;
256
257 rcu_read_unlock();
258
259 return pmctx;
260}
261
4cdd0d10
NA		 262/* when snooping we need to check if the contexts should be used
263 * in the following order:
264 * - if pmctx is non-NULL (port), check if it should be used
265 * - if pmctx is NULL (bridge), check if brmctx should be used
266 */
267static bool
268br_multicast_ctx_should_use(const struct net_bridge_mcast *brmctx,
269 const struct net_bridge_mcast_port *pmctx)
270{
271 if (!netif_running(brmctx->br->dev))
272 return false;
273
274 if (pmctx)
275 return !br_multicast_port_ctx_state_disabled(pmctx);
276 else
277 return !br_multicast_ctx_vlan_disabled(brmctx);
278}
279
b0812368
NA		 280static bool br_port_group_equal(struct net_bridge_port_group *p,
281 struct net_bridge_port *port,
282 const unsigned char *src)
283{
284 if (p->key.port != port)
285 return false;
286
287 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
288 return true;
289
290 return ether_addr_equal(src, p->eth_addr);
291}
292
adc47037
NA		 293static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx,
294 struct net_bridge_port_group *pg,
8266a049
NA		 295 struct br_ip *sg_ip)
296{
297 struct net_bridge_port_group_sg_key sg_key;
8266a049 298 struct net_bridge_port_group *src_pg;
adc47037 299 struct net_bridge_mcast *brmctx;
8266a049
NA		 300
301 memset(&sg_key, 0, sizeof(sg_key));
7b54aaaf 302 brmctx = br_multicast_port_ctx_get_global(pmctx);
8266a049
NA		 303 sg_key.port = pg->key.port;
304 sg_key.addr = *sg_ip;
adc47037 305 if (br_sg_port_find(brmctx->br, &sg_key))
8266a049
NA		 306 return;
307
adc47037
NA		 308 src_pg = __br_multicast_add_group(brmctx, pmctx,
309 sg_ip, pg->eth_addr,
9116ffbf 310 MCAST_INCLUDE, false, false);
8266a049
NA		 311 if (IS_ERR_OR_NULL(src_pg) ||
312 src_pg->rt_protocol != RTPROT_KERNEL)
313 return;
314
315 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
316}
317
318static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
319 struct br_ip *sg_ip)
320{
321 struct net_bridge_port_group_sg_key sg_key;
322 struct net_bridge *br = pg->key.port->br;
323 struct net_bridge_port_group *src_pg;
324
325 memset(&sg_key, 0, sizeof(sg_key));
326 sg_key.port = pg->key.port;
327 sg_key.addr = *sg_ip;
328 src_pg = br_sg_port_find(br, &sg_key);
329 if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
330 src_pg->rt_protocol != RTPROT_KERNEL)
331 return;
332
333 br_multicast_find_del_pg(br, src_pg);
334}
335
336/* When a port group transitions to (or is added as) EXCLUDE we need to add it
337 * to all other ports' S,G entries which are not blocked by the current group
338 * for proper replication, the assumption is that any S,G blocked entries
339 * are already added so the S,G,port lookup should skip them.
340 * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
341 * deleted we need to remove it from all ports' S,G entries where it was
342 * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
343 */
344void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
345 u8 filter_mode)
346{
347 struct net_bridge *br = pg->key.port->br;
348 struct net_bridge_port_group *pg_lst;
adc47037 349 struct net_bridge_mcast_port *pmctx;
8266a049
NA		 350 struct net_bridge_mdb_entry *mp;
351 struct br_ip sg_ip;
352
353 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
354 return;
355
356 mp = br_mdb_ip_get(br, &pg->key.addr);
357 if (!mp)
358 return;
eb1593a0
NA		 359 pmctx = br_multicast_pg_to_port_ctx(pg);
360 if (!pmctx)
361 return;
8266a049
NA		 362
363 memset(&sg_ip, 0, sizeof(sg_ip));
364 sg_ip = pg->key.addr;
7b54aaaf 365
8266a049
NA		 366 for (pg_lst = mlock_dereference(mp->ports, br);
367 pg_lst;
368 pg_lst = mlock_dereference(pg_lst->next, br)) {
369 struct net_bridge_group_src *src_ent;
370
371 if (pg_lst == pg)
372 continue;
373 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
374 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
375 continue;
376 sg_ip.src = src_ent->addr.src;
377 switch (filter_mode) {
378 case MCAST_INCLUDE:
379 __fwd_del_star_excl(pg, &sg_ip);
380 break;
381 case MCAST_EXCLUDE:
adc47037 382 __fwd_add_star_excl(pmctx, pg, &sg_ip);
8266a049
NA		 383 break;
384 }
385 }
386 }
387}
388
094b82fd
NA		 389/* called when adding a new S,G with host_joined == false by default */
390static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
391 struct net_bridge_port_group *sg)
392{
393 struct net_bridge_mdb_entry *sg_mp;
394
395 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
396 return;
397 if (!star_mp->host_joined)
398 return;
399
400 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
401 if (!sg_mp)
402 return;
403 sg_mp->host_joined = true;
404}
405
406/* set the host_joined state of all of *,G's S,G entries */
407static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
408{
409 struct net_bridge *br = star_mp->br;
410 struct net_bridge_mdb_entry *sg_mp;
411 struct net_bridge_port_group *pg;
412 struct br_ip sg_ip;
413
414 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
415 return;
416
417 memset(&sg_ip, 0, sizeof(sg_ip));
418 sg_ip = star_mp->addr;
419 for (pg = mlock_dereference(star_mp->ports, br);
420 pg;
421 pg = mlock_dereference(pg->next, br)) {
422 struct net_bridge_group_src *src_ent;
423
424 hlist_for_each_entry(src_ent, &pg->src_list, node) {
425 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
426 continue;
427 sg_ip.src = src_ent->addr.src;
428 sg_mp = br_mdb_ip_get(br, &sg_ip);
429 if (!sg_mp)
430 continue;
431 sg_mp->host_joined = star_mp->host_joined;
432 }
433 }
434}
435
8266a049
NA		 436static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
437{
438 struct net_bridge_port_group __rcu **pp;
439 struct net_bridge_port_group *p;
440
441 /* *,G exclude ports are only added to S,G entries */
442 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
443 return;
444
445 /* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
446 * we should ignore perm entries since they're managed by user-space
447 */
448 for (pp = &sgmp->ports;
449 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
450 pp = &p->next)
451 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
452 MDB_PG_FLAGS_PERMANENT)))
453 return;
454
094b82fd
NA		 455 /* currently the host can only have joined the *,G which means
456 * we treat it as EXCLUDE {}, so for an S,G it's considered a
457 * STAR_EXCLUDE entry and we can safely leave it
458 */
459 sgmp->host_joined = false;
460
8266a049
NA		 461 for (pp = &sgmp->ports;
462 (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
463 if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
464 br_multicast_del_pg(sgmp, p, pp);
465 else
466 pp = &p->next;
467 }
468}
469
470void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
471 struct net_bridge_port_group *sg)
472{
473 struct net_bridge_port_group_sg_key sg_key;
474 struct net_bridge *br = star_mp->br;
adc47037 475 struct net_bridge_mcast_port *pmctx;
8266a049 476 struct net_bridge_port_group *pg;
adc47037 477 struct net_bridge_mcast *brmctx;
8266a049
NA		 478
479 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
480 return;
481 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
482 return;
483
094b82fd 484 br_multicast_sg_host_state(star_mp, sg);
8266a049
NA		 485 memset(&sg_key, 0, sizeof(sg_key));
486 sg_key.addr = sg->key.addr;
487 /* we need to add all exclude ports to the S,G */
488 for (pg = mlock_dereference(star_mp->ports, br);
489 pg;
490 pg = mlock_dereference(pg->next, br)) {
491 struct net_bridge_port_group *src_pg;
492
493 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
494 continue;
495
496 sg_key.port = pg->key.port;
497 if (br_sg_port_find(br, &sg_key))
498 continue;
499
eb1593a0
NA		 500 pmctx = br_multicast_pg_to_port_ctx(pg);
501 if (!pmctx)
502 continue;
503 brmctx = br_multicast_port_ctx_get_global(pmctx);
504
adc47037 505 src_pg = __br_multicast_add_group(brmctx, pmctx,
8266a049
NA		 506 &sg->key.addr,
507 sg->eth_addr,
9116ffbf 508 MCAST_INCLUDE, false, false);
8266a049
NA		 509 if (IS_ERR_OR_NULL(src_pg) ||
510 src_pg->rt_protocol != RTPROT_KERNEL)
511 continue;
512 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
513 }
514}
515
b0812368
NA		 516static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
517{
8266a049 518 struct net_bridge_mdb_entry *star_mp;
adc47037 519 struct net_bridge_mcast_port *pmctx;
b0812368 520 struct net_bridge_port_group *sg;
adc47037 521 struct net_bridge_mcast *brmctx;
b0812368
NA		 522 struct br_ip sg_ip;
523
524 if (src->flags & BR_SGRP_F_INSTALLED)
525 return;
526
527 memset(&sg_ip, 0, sizeof(sg_ip));
eb1593a0
NA		 528 pmctx = br_multicast_pg_to_port_ctx(src->pg);
529 if (!pmctx)
530 return;
7b54aaaf 531 brmctx = br_multicast_port_ctx_get_global(pmctx);
b0812368
NA		 532 sg_ip = src->pg->key.addr;
533 sg_ip.src = src->addr.src;
adc47037
NA		 534
535 sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip,
9116ffbf
NA		 536 src->pg->eth_addr, MCAST_INCLUDE, false,
537 !timer_pending(&src->timer));
b0812368
NA		 538 if (IS_ERR_OR_NULL(sg))
539 return;
540 src->flags |= BR_SGRP_F_INSTALLED;
8266a049 541 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
b0812368
NA		 542
543 /* if it was added by user-space as perm we can skip next steps */
544 if (sg->rt_protocol != RTPROT_KERNEL &&
545 (sg->flags & MDB_PG_FLAGS_PERMANENT))
546 return;
547
548 /* the kernel is now responsible for removing this S,G */
549 del_timer(&sg->timer);
8266a049
NA		 550 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
551 if (!star_mp)
552 return;
553
554 br_multicast_sg_add_exclude_ports(star_mp, sg);
b0812368
NA		 555}
556
d5a10222
NA		 557static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
558 bool fastleave)
b0812368
NA		 559{
560 struct net_bridge_port_group *p, *pg = src->pg;
561 struct net_bridge_port_group __rcu **pp;
562 struct net_bridge_mdb_entry *mp;
563 struct br_ip sg_ip;
564
565 memset(&sg_ip, 0, sizeof(sg_ip));
566 sg_ip = pg->key.addr;
567 sg_ip.src = src->addr.src;
568
569 mp = br_mdb_ip_get(src->br, &sg_ip);
570 if (!mp)
571 return;
572
573 for (pp = &mp->ports;
574 (p = mlock_dereference(*pp, src->br)) != NULL;
575 pp = &p->next) {
576 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
577 continue;
578
579 if (p->rt_protocol != RTPROT_KERNEL &&
a01ecb17
IS		 580 (p->flags & MDB_PG_FLAGS_PERMANENT) &&
581 !(src->flags & BR_SGRP_F_USER_ADDED))
b0812368
NA		 582 break;
583
d5a10222
NA		 584 if (fastleave)
585 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
b0812368
NA		 586 br_multicast_del_pg(mp, p, pp);
587 break;
588 }
589 src->flags &= ~BR_SGRP_F_INSTALLED;
590}
591
9116ffbf 592/* install S,G and based on src's timer enable or disable forwarding */
b0812368
NA		 593static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
594{
9116ffbf
NA		 595 struct net_bridge_port_group_sg_key sg_key;
596 struct net_bridge_port_group *sg;
597 u8 old_flags;
598
b0812368 599 br_multicast_fwd_src_add(src);
9116ffbf
NA		 600
601 memset(&sg_key, 0, sizeof(sg_key));
602 sg_key.addr = src->pg->key.addr;
603 sg_key.addr.src = src->addr.src;
604 sg_key.port = src->pg->key.port;
605
606 sg = br_sg_port_find(src->br, &sg_key);
607 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
608 return;
609
610 old_flags = sg->flags;
611 if (timer_pending(&src->timer))
612 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
613 else
614 sg->flags |= MDB_PG_FLAGS_BLOCKED;
615
616 if (old_flags != sg->flags) {
617 struct net_bridge_mdb_entry *sg_mp;
618
619 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
620 if (!sg_mp)
621 return;
622 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
623 }
b0812368
NA		 624}
625
e12cec65
NA		 626static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
627{
628 struct net_bridge_mdb_entry *mp;
629
630 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
631 WARN_ON(!hlist_unhashed(&mp->mdb_node));
632 WARN_ON(mp->ports);
633
292a089d 634 timer_shutdown_sync(&mp->timer);
e12cec65
NA		 635 kfree_rcu(mp, rcu);
636}
637
638static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
639{
640 struct net_bridge *br = mp->br;
641
642 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
643 br_mdb_rht_params);
644 hlist_del_init_rcu(&mp->mdb_node);
645 hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
646 queue_work(system_long_wq, &br->mcast_gc_work);
647}
648
88c1f37f 649static void br_multicast_group_expired(struct timer_list *t)
eb1d1641 650{
88c1f37f 651 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
eb1d1641 652 struct net_bridge *br = mp->br;
eb1d1641
HX		 653
654 spin_lock(&br->multicast_lock);
b0812368
NA		 655 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
656 timer_pending(&mp->timer))
eb1d1641
HX		 657 goto out;
658
1bc844ee 659 br_multicast_host_leave(mp, true);
eb1d1641
HX		 660
661 if (mp->ports)
662 goto out;
e12cec65
NA		 663 br_multicast_del_mdb_entry(mp);
664out:
665 spin_unlock(&br->multicast_lock);
666}
eb1d1641 667
e12cec65
NA		 668static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
669{
670 struct net_bridge_group_src *src;
eb1d1641 671
e12cec65
NA		 672 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
673 WARN_ON(!hlist_unhashed(&src->node));
eb1d1641 674
292a089d 675 timer_shutdown_sync(&src->timer);
e12cec65 676 kfree_rcu(src, rcu);
eb1d1641
HX		 677}
678
083e3534 679void __br_multicast_del_group_src(struct net_bridge_group_src *src)
8b671779 680{
085b53c8 681 struct net_bridge *br = src->pg->key.port->br;
8b671779
NA		 682
683 hlist_del_init_rcu(&src->node);
684 src->pg->src_ents--;
e12cec65
NA		 685 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
686 queue_work(system_long_wq, &br->mcast_gc_work);
687}
688
083e3534
IS		 689void br_multicast_del_group_src(struct net_bridge_group_src *src,
690 bool fastleave)
691{
692 br_multicast_fwd_src_remove(src, fastleave);
693 __br_multicast_del_group_src(src);
694}
695
b57e8d87
PM		 696static int
697br_multicast_port_ngroups_inc_one(struct net_bridge_mcast_port *pmctx,
698 struct netlink_ext_ack *extack,
699 const char *what)
700{
701 u32 max = READ_ONCE(pmctx->mdb_max_entries);
702 u32 n = READ_ONCE(pmctx->mdb_n_entries);
703
704 if (max && n >= max) {
705 NL_SET_ERR_MSG_FMT_MOD(extack, "%s is already in %u groups, and mcast_max_groups=%u",
706 what, n, max);
707 return -E2BIG;
708 }
709
710 WRITE_ONCE(pmctx->mdb_n_entries, n + 1);
711 return 0;
712}
713
714static void br_multicast_port_ngroups_dec_one(struct net_bridge_mcast_port *pmctx)
715{
716 u32 n = READ_ONCE(pmctx->mdb_n_entries);
717
718 WARN_ON_ONCE(n == 0);
719 WRITE_ONCE(pmctx->mdb_n_entries, n - 1);
720}
721
722static int br_multicast_port_ngroups_inc(struct net_bridge_port *port,
723 const struct br_ip *group,
724 struct netlink_ext_ack *extack)
725{
726 struct net_bridge_mcast_port *pmctx;
727 int err;
728
729 lockdep_assert_held_once(&port->br->multicast_lock);
730
731 /* Always count on the port context. */
732 err = br_multicast_port_ngroups_inc_one(&port->multicast_ctx, extack,
733 "Port");
734 if (err) {
735 trace_br_mdb_full(port->dev, group);
736 return err;
737 }
738
739 /* Only count on the VLAN context if VID is given, and if snooping on
740 * that VLAN is enabled.
741 */
742 if (!group->vid)
743 return 0;
744
745 pmctx = br_multicast_port_vid_to_port_ctx(port, group->vid);
746 if (!pmctx)
747 return 0;
748
749 err = br_multicast_port_ngroups_inc_one(pmctx, extack, "Port-VLAN");
750 if (err) {
751 trace_br_mdb_full(port->dev, group);
752 goto dec_one_out;
753 }
754
755 return 0;
756
757dec_one_out:
758 br_multicast_port_ngroups_dec_one(&port->multicast_ctx);
759 return err;
760}
761
762static void br_multicast_port_ngroups_dec(struct net_bridge_port *port, u16 vid)
763{
764 struct net_bridge_mcast_port *pmctx;
765
766 lockdep_assert_held_once(&port->br->multicast_lock);
767
768 if (vid) {
769 pmctx = br_multicast_port_vid_to_port_ctx(port, vid);
770 if (pmctx)
771 br_multicast_port_ngroups_dec_one(pmctx);
772 }
773 br_multicast_port_ngroups_dec_one(&port->multicast_ctx);
774}
775
a1aee20d
PM		 776u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx)
777{
778 return READ_ONCE(pmctx->mdb_n_entries);
779}
780
781void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max)
782{
783 WRITE_ONCE(pmctx->mdb_max_entries, max);
784}
785
786u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx)
787{
788 return READ_ONCE(pmctx->mdb_max_entries);
789}
790
e12cec65
NA		 791static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
792{
793 struct net_bridge_port_group *pg;
794
795 pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
796 WARN_ON(!hlist_unhashed(&pg->mglist));
797 WARN_ON(!hlist_empty(&pg->src_list));
798
292a089d
SRG		 799 timer_shutdown_sync(&pg->rexmit_timer);
800 timer_shutdown_sync(&pg->timer);
e12cec65 801 kfree_rcu(pg, rcu);
8b671779
NA		 802}
803
681590bd
NA		 804void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
805 struct net_bridge_port_group *pg,
806 struct net_bridge_port_group __rcu **pp)
807{
085b53c8 808 struct net_bridge *br = pg->key.port->br;
8b671779
NA		 809 struct net_bridge_group_src *ent;
810 struct hlist_node *tmp;
681590bd
NA		 811
812 rcu_assign_pointer(*pp, pg->next);
813 hlist_del_init(&pg->mglist);
baa74d39 814 br_multicast_eht_clean_sets(pg);
8b671779 815 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
d5a10222 816 br_multicast_del_group_src(ent, false);
81f19838 817 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
74705582
NA		 818 if (!br_multicast_is_star_g(&mp->addr)) {
819 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
820 br_sg_port_rht_params);
8266a049 821 br_multicast_sg_del_exclude_ports(mp);
74705582 822 } else {
8266a049 823 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
74705582 824 }
b57e8d87 825 br_multicast_port_ngroups_dec(pg->key.port, pg->key.addr.vid);
e12cec65
NA		 826 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
827 queue_work(system_long_wq, &br->mcast_gc_work);
681590bd
NA		 828
829 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
830 mod_timer(&mp->timer, jiffies);
831}
832
833static void br_multicast_find_del_pg(struct net_bridge *br,
834 struct net_bridge_port_group *pg)
eb1d1641 835{
8b671779 836 struct net_bridge_port_group __rcu **pp;
eb1d1641
HX		 837 struct net_bridge_mdb_entry *mp;
838 struct net_bridge_port_group *p;
e8051688 839
085b53c8 840 mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641
HX		 841 if (WARN_ON(!mp))
842 return;
843
e8051688
ED		 844 for (pp = &mp->ports;
845 (p = mlock_dereference(*pp, br)) != NULL;
846 pp = &p->next) {
eb1d1641
HX		 847 if (p != pg)
848 continue;
849
681590bd 850 br_multicast_del_pg(mp, pg, pp);
eb1d1641
HX		 851 return;
852 }
853
854 WARN_ON(1);
855}
856
88c1f37f 857static void br_multicast_port_group_expired(struct timer_list *t)
eb1d1641 858{
88c1f37f 859 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
d6c33d67 860 struct net_bridge_group_src *src_ent;
085b53c8 861 struct net_bridge *br = pg->key.port->br;
d6c33d67
NA		 862 struct hlist_node *tmp;
863 bool changed;
eb1d1641
HX		 864
865 spin_lock(&br->multicast_lock);
866 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
9d06b6d8 867 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
eb1d1641
HX		 868 goto out;
869
d6c33d67
NA		 870 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
871 pg->filter_mode = MCAST_INCLUDE;
872 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
873 if (!timer_pending(&src_ent->timer)) {
d5a10222 874 br_multicast_del_group_src(src_ent, false);
d6c33d67
NA		 875 changed = true;
876 }
877 }
878
879 if (hlist_empty(&pg->src_list)) {
880 br_multicast_find_del_pg(br, pg);
881 } else if (changed) {
085b53c8 882 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
eb1d1641 883
8266a049
NA		 884 if (changed && br_multicast_is_star_g(&pg->key.addr))
885 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
886
d6c33d67
NA		 887 if (WARN_ON(!mp))
888 goto out;
889 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
890 }
eb1d1641
HX		 891out:
892 spin_unlock(&br->multicast_lock);
893}
894
e12cec65
NA		 895static void br_multicast_gc(struct hlist_head *head)
896{
897 struct net_bridge_mcast_gc *gcent;
898 struct hlist_node *tmp;
899
900 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
901 hlist_del_init(&gcent->gc_node);
902 gcent->destroy(gcent);
903 }
904}
905
615cc23e
NA		 906static void __br_multicast_query_handle_vlan(struct net_bridge_mcast *brmctx,
907 struct net_bridge_mcast_port *pmctx,
908 struct sk_buff *skb)
909{
910 struct net_bridge_vlan *vlan = NULL;
911
912 if (pmctx && br_multicast_port_ctx_is_vlan(pmctx))
913 vlan = pmctx->vlan;
914 else if (br_multicast_ctx_is_vlan(brmctx))
915 vlan = brmctx->vlan;
916
917 if (vlan && !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) {
918 u16 vlan_proto;
919
920 if (br_vlan_get_proto(brmctx->br->dev, &vlan_proto) != 0)
921 return;
922 __vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan->vid);
923 }
924}
925
adc47037 926static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx,
615cc23e 927 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 928 struct net_bridge_port_group *pg,
929 __be32 ip_dst, __be32 group,
930 bool with_srcs, bool over_lmqt,
42c11ccf
NA		 931 u8 sflag, u8 *igmp_type,
932 bool *need_rexmit)
eb1d1641 933{
085b53c8 934 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 935 struct net_bridge_group_src *ent;
936 size_t pkt_size, igmp_hdr_size;
937 unsigned long now = jiffies;
5e923585 938 struct igmpv3_query *ihv3;
438ef2d0
NA		 939 void *csum_start = NULL;
940 __sum16 *csum = NULL;
eb1d1641
HX		 941 struct sk_buff *skb;
942 struct igmphdr *ih;
943 struct ethhdr *eth;
438ef2d0 944 unsigned long lmqt;
eb1d1641 945 struct iphdr *iph;
438ef2d0 946 u16 lmqt_srcs = 0;
eb1d1641 947
5e923585 948 igmp_hdr_size = sizeof(*ih);
d3d065c0 949 if (brmctx->multicast_igmp_version == 3) {
5e923585 950 igmp_hdr_size = sizeof(*ihv3);
438ef2d0 951 if (pg && with_srcs) {
d3d065c0
NA		 952 lmqt = now + (brmctx->multicast_last_member_interval *
953 brmctx->multicast_last_member_count);
438ef2d0
NA		 954 hlist_for_each_entry(ent, &pg->src_list, node) {
955 if (over_lmqt == time_after(ent->timer.expires,
956 lmqt) &&
957 ent->src_query_rexmit_cnt > 0)
958 lmqt_srcs++;
959 }
960
961 if (!lmqt_srcs)
962 return NULL;
963 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
964 }
965 }
966
967 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
968 if ((p && pkt_size > p->dev->mtu) ||
adc47037 969 pkt_size > brmctx->br->dev->mtu)
438ef2d0
NA		 970 return NULL;
971
adc47037 972 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
eb1d1641
HX		 973 if (!skb)
974 goto out;
975
615cc23e 976 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
eb1d1641
HX		 977 skb->protocol = htons(ETH_P_IP);
978
979 skb_reset_mac_header(skb);
980 eth = eth_hdr(skb);
981
adc47037 982 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
438ef2d0 983 ip_eth_mc_map(ip_dst, eth->h_dest);
eb1d1641
HX		 984 eth->h_proto = htons(ETH_P_IP);
985 skb_put(skb, sizeof(*eth));
986
987 skb_set_network_header(skb, skb->len);
988 iph = ip_hdr(skb);
438ef2d0 989 iph->tot_len = htons(pkt_size - sizeof(*eth));
eb1d1641
HX		 990
991 iph->version = 4;
992 iph->ihl = 6;
993 iph->tos = 0xc0;
eb1d1641
HX		 994 iph->id = 0;
995 iph->frag_off = htons(IP_DF);
996 iph->ttl = 1;
997 iph->protocol = IPPROTO_IGMP;
adc47037
NA		 998 iph->saddr = br_opt_get(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
999 inet_select_addr(brmctx->br->dev, 0, RT_SCOPE_LINK) : 0;
438ef2d0 1000 iph->daddr = ip_dst;
eb1d1641
HX		 1001 ((u8 *)&iph[1])[0] = IPOPT_RA;
1002 ((u8 *)&iph[1])[1] = 4;
1003 ((u8 *)&iph[1])[2] = 0;
1004 ((u8 *)&iph[1])[3] = 0;
1005 ip_send_check(iph);
1006 skb_put(skb, 24);
1007
1008 skb_set_transport_header(skb, skb->len);
1080ab95 1009 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
eb1d1641 1010
d3d065c0 1011 switch (brmctx->multicast_igmp_version) {
5e923585
NA		 1012 case 2:
1013 ih = igmp_hdr(skb);
1014 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
d3d065c0
NA		 1015 ih->code = (group ? brmctx->multicast_last_member_interval :
1016 brmctx->multicast_query_response_interval) /
5e923585
NA		 1017 (HZ / IGMP_TIMER_SCALE);
1018 ih->group = group;
1019 ih->csum = 0;
438ef2d0
NA		 1020 csum = &ih->csum;
1021 csum_start = (void *)ih;
5e923585
NA		 1022 break;
1023 case 3:
1024 ihv3 = igmpv3_query_hdr(skb);
1025 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
d3d065c0
NA		 1026 ihv3->code = (group ? brmctx->multicast_last_member_interval :
1027 brmctx->multicast_query_response_interval) /
5e923585
NA		 1028 (HZ / IGMP_TIMER_SCALE);
1029 ihv3->group = group;
d3d065c0 1030 ihv3->qqic = brmctx->multicast_query_interval / HZ;
438ef2d0 1031 ihv3->nsrcs = htons(lmqt_srcs);
5e923585 1032 ihv3->resv = 0;
438ef2d0 1033 ihv3->suppress = sflag;
5e923585
NA		 1034 ihv3->qrv = 2;
1035 ihv3->csum = 0;
438ef2d0
NA		 1036 csum = &ihv3->csum;
1037 csum_start = (void *)ihv3;
1038 if (!pg || !with_srcs)
1039 break;
1040
1041 lmqt_srcs = 0;
1042 hlist_for_each_entry(ent, &pg->src_list, node) {
1043 if (over_lmqt == time_after(ent->timer.expires,
1044 lmqt) &&
1045 ent->src_query_rexmit_cnt > 0) {
deb96566 1046 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
438ef2d0 1047 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 1048 if (need_rexmit && ent->src_query_rexmit_cnt)
1049 *need_rexmit = true;
438ef2d0
NA		 1050 }
1051 }
1052 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
1053 kfree_skb(skb);
1054 return NULL;
1055 }
5e923585
NA		 1056 break;
1057 }
1058
438ef2d0
NA		 1059 if (WARN_ON(!csum || !csum_start)) {
1060 kfree_skb(skb);
1061 return NULL;
1062 }
1063
1064 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
5e923585 1065 skb_put(skb, igmp_hdr_size);
eb1d1641
HX		 1066 __skb_pull(skb, sizeof(*eth));
1067
1068out:
1069 return skb;
1070}
1071
dfd56b8b 1072#if IS_ENABLED(CONFIG_IPV6)
adc47037 1073static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx,
615cc23e 1074 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 1075 struct net_bridge_port_group *pg,
1076 const struct in6_addr *ip6_dst,
1077 const struct in6_addr *group,
1078 bool with_srcs, bool over_llqt,
42c11ccf
NA		 1079 u8 sflag, u8 *igmp_type,
1080 bool *need_rexmit)
08b202b6 1081{
085b53c8 1082 struct net_bridge_port *p = pg ? pg->key.port : NULL;
438ef2d0
NA		 1083 struct net_bridge_group_src *ent;
1084 size_t pkt_size, mld_hdr_size;
1085 unsigned long now = jiffies;
aa2ae3e7 1086 struct mld2_query *mld2q;
438ef2d0 1087 void *csum_start = NULL;
aa2ae3e7 1088 unsigned long interval;
438ef2d0 1089 __sum16 *csum = NULL;
08b202b6
YH		 1090 struct ipv6hdr *ip6h;
1091 struct mld_msg *mldq;
aa2ae3e7 1092 struct sk_buff *skb;
438ef2d0 1093 unsigned long llqt;
08b202b6 1094 struct ethhdr *eth;
438ef2d0 1095 u16 llqt_srcs = 0;
08b202b6 1096 u8 *hopopt;
08b202b6 1097
aa2ae3e7 1098 mld_hdr_size = sizeof(*mldq);
d3d065c0 1099 if (brmctx->multicast_mld_version == 2) {
aa2ae3e7 1100 mld_hdr_size = sizeof(*mld2q);
438ef2d0 1101 if (pg && with_srcs) {
d3d065c0
NA		 1102 llqt = now + (brmctx->multicast_last_member_interval *
1103 brmctx->multicast_last_member_count);
438ef2d0
NA		 1104 hlist_for_each_entry(ent, &pg->src_list, node) {
1105 if (over_llqt == time_after(ent->timer.expires,
1106 llqt) &&
1107 ent->src_query_rexmit_cnt > 0)
1108 llqt_srcs++;
1109 }
1110
1111 if (!llqt_srcs)
1112 return NULL;
1113 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
1114 }
1115 }
1116
1117 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
1118 if ((p && pkt_size > p->dev->mtu) ||
adc47037 1119 pkt_size > brmctx->br->dev->mtu)
438ef2d0
NA		 1120 return NULL;
1121
adc47037 1122 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
08b202b6
YH		 1123 if (!skb)
1124 goto out;
1125
615cc23e 1126 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
08b202b6
YH		 1127 skb->protocol = htons(ETH_P_IPV6);
1128
1129 /* Ethernet header */
1130 skb_reset_mac_header(skb);
1131 eth = eth_hdr(skb);
1132
adc47037 1133 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
08b202b6
YH		 1134 eth->h_proto = htons(ETH_P_IPV6);
1135 skb_put(skb, sizeof(*eth));
1136
1137 /* IPv6 header + HbH option */
1138 skb_set_network_header(skb, skb->len);
1139 ip6h = ipv6_hdr(skb);
1140
1141 *(__force __be32 *)ip6h = htonl(0x60000000);
aa2ae3e7 1142 ip6h->payload_len = htons(8 + mld_hdr_size);
08b202b6
YH		 1143 ip6h->nexthdr = IPPROTO_HOPOPTS;
1144 ip6h->hop_limit = 1;
438ef2d0 1145 ip6h->daddr = *ip6_dst;
adc47037
NA		 1146 if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev,
1147 &ip6h->daddr, 0, &ip6h->saddr)) {
d1d81d4c 1148 kfree_skb(skb);
adc47037 1149 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false);
d1d81d4c
UW		 1150 return NULL;
1151 }
0888d5f3 1152
adc47037 1153 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true);
36cff5a1 1154 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
08b202b6
YH		 1155
1156 hopopt = (u8 *)(ip6h + 1);
1157 hopopt[0] = IPPROTO_ICMPV6; /* next hdr */
1158 hopopt[1] = 0; /* length of HbH */
1159 hopopt[2] = IPV6_TLV_ROUTERALERT; /* Router Alert */
1160 hopopt[3] = 2; /* Length of RA Option */
1161 hopopt[4] = 0; /* Type = 0x0000 (MLD) */
1162 hopopt[5] = 0;
1de5a71c
EZ		 1163 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
1164 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
08b202b6
YH		 1165
1166 skb_put(skb, sizeof(*ip6h) + 8);
1167
1168 /* ICMPv6 */
1169 skb_set_transport_header(skb, skb->len);
438ef2d0 1170 interval = ipv6_addr_any(group) ?
d3d065c0
NA		 1171 brmctx->multicast_query_response_interval :
1172 brmctx->multicast_last_member_interval;
1080ab95 1173 *igmp_type = ICMPV6_MGM_QUERY;
d3d065c0 1174 switch (brmctx->multicast_mld_version) {
aa2ae3e7
NA		 1175 case 1:
1176 mldq = (struct mld_msg *)icmp6_hdr(skb);
1177 mldq->mld_type = ICMPV6_MGM_QUERY;
1178 mldq->mld_code = 0;
1179 mldq->mld_cksum = 0;
1180 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
1181 mldq->mld_reserved = 0;
438ef2d0
NA		 1182 mldq->mld_mca = *group;
1183 csum = &mldq->mld_cksum;
1184 csum_start = (void *)mldq;
aa2ae3e7
NA		 1185 break;
1186 case 2:
1187 mld2q = (struct mld2_query *)icmp6_hdr(skb);
53631a5f 1188 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
aa2ae3e7
NA		 1189 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
1190 mld2q->mld2q_code = 0;
1191 mld2q->mld2q_cksum = 0;
1192 mld2q->mld2q_resv1 = 0;
1193 mld2q->mld2q_resv2 = 0;
438ef2d0 1194 mld2q->mld2q_suppress = sflag;
aa2ae3e7 1195 mld2q->mld2q_qrv = 2;
438ef2d0 1196 mld2q->mld2q_nsrcs = htons(llqt_srcs);
d3d065c0 1197 mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ;
438ef2d0
NA		 1198 mld2q->mld2q_mca = *group;
1199 csum = &mld2q->mld2q_cksum;
1200 csum_start = (void *)mld2q;
1201 if (!pg || !with_srcs)
1202 break;
1203
1204 llqt_srcs = 0;
1205 hlist_for_each_entry(ent, &pg->src_list, node) {
1206 if (over_llqt == time_after(ent->timer.expires,
1207 llqt) &&
1208 ent->src_query_rexmit_cnt > 0) {
deb96566 1209 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
438ef2d0 1210 ent->src_query_rexmit_cnt--;
42c11ccf
NA		 1211 if (need_rexmit && ent->src_query_rexmit_cnt)
1212 *need_rexmit = true;
438ef2d0
NA		 1213 }
1214 }
1215 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
1216 kfree_skb(skb);
1217 return NULL;
1218 }
aa2ae3e7
NA		 1219 break;
1220 }
08b202b6 1221
438ef2d0
NA		 1222 if (WARN_ON(!csum || !csum_start)) {
1223 kfree_skb(skb);
1224 return NULL;
1225 }
1226
1227 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
1228 IPPROTO_ICMPV6,
1229 csum_partial(csum_start, mld_hdr_size, 0));
1230 skb_put(skb, mld_hdr_size);
08b202b6
YH		 1231 __skb_pull(skb, sizeof(*eth));
1232
1233out:
1234 return skb;
1235}
1236#endif
1237
adc47037 1238static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx,
615cc23e 1239 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 1240 struct net_bridge_port_group *pg,
1241 struct br_ip *ip_dst,
1242 struct br_ip *group,
1243 bool with_srcs, bool over_lmqt,
42c11ccf
NA		 1244 u8 sflag, u8 *igmp_type,
1245 bool *need_rexmit)
8ef2a9a5 1246{
438ef2d0
NA		 1247 __be32 ip4_dst;
1248
1249 switch (group->proto) {
8ef2a9a5 1250 case htons(ETH_P_IP):
eab3227b 1251 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
615cc23e 1252 return br_ip4_multicast_alloc_query(brmctx, pmctx, pg,
eab3227b 1253 ip4_dst, group->dst.ip4,
438ef2d0 1254 with_srcs, over_lmqt,
42c11ccf
NA		 1255 sflag, igmp_type,
1256 need_rexmit);
dfd56b8b 1257#if IS_ENABLED(CONFIG_IPV6)
438ef2d0
NA		 1258 case htons(ETH_P_IPV6): {
1259 struct in6_addr ip6_dst;
1260
1261 if (ip_dst)
eab3227b 1262 ip6_dst = ip_dst->dst.ip6;
438ef2d0
NA		 1263 else
1264 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1265 htonl(1));
1266
615cc23e 1267 return br_ip6_multicast_alloc_query(brmctx, pmctx, pg,
eab3227b 1268 &ip6_dst, &group->dst.ip6,
438ef2d0 1269 with_srcs, over_lmqt,
42c11ccf
NA		 1270 sflag, igmp_type,
1271 need_rexmit);
438ef2d0 1272 }
08b202b6 1273#endif
8ef2a9a5
YH		 1274 }
1275 return NULL;
1276}
1277
cfd56754 1278struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
5e923585 1279 struct br_ip *group)
eb1d1641 1280{
eb1d1641 1281 struct net_bridge_mdb_entry *mp;
4c0833bc 1282 int err;
eb1d1641 1283
19e3a9c9
NA		 1284 mp = br_mdb_ip_get(br, group);
1285 if (mp)
1286 return mp;
eb1d1641 1287
19e3a9c9 1288 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
b57e8d87 1289 trace_br_mdb_full(br->dev, group);
c832962a 1290 br_mc_disabled_update(br->dev, false, NULL);
19e3a9c9
NA		 1291 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1292 return ERR_PTR(-E2BIG);
eb1d1641
HX		 1293 }
1294
1295 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1296 if (unlikely(!mp))
4c0833bc 1297 return ERR_PTR(-ENOMEM);
eb1d1641
HX		 1298
1299 mp->br = br;
8ef2a9a5 1300 mp->addr = *group;
e12cec65 1301 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
88c1f37f 1302 timer_setup(&mp->timer, br_multicast_group_expired, 0);
19e3a9c9
NA		 1303 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1304 br_mdb_rht_params);
1305 if (err) {
1306 kfree(mp);
1307 mp = ERR_PTR(err);
1308 } else {
1309 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1310 }
1faabf2a 1311
eb1d1641
HX		 1312 return mp;
1313}
1314
8b671779
NA		 1315static void br_multicast_group_src_expired(struct timer_list *t)
1316{
1317 struct net_bridge_group_src *src = from_timer(src, t, timer);
1318 struct net_bridge_port_group *pg;
1319 struct net_bridge *br = src->br;
1320
1321 spin_lock(&br->multicast_lock);
1322 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1323 timer_pending(&src->timer))
1324 goto out;
1325
1326 pg = src->pg;
1327 if (pg->filter_mode == MCAST_INCLUDE) {
d5a10222 1328 br_multicast_del_group_src(src, false);
8b671779
NA		 1329 if (!hlist_empty(&pg->src_list))
1330 goto out;
1331 br_multicast_find_del_pg(br, pg);
9116ffbf
NA		 1332 } else {
1333 br_multicast_fwd_src_handle(src);
8b671779 1334 }
9116ffbf 1335
8b671779
NA		 1336out:
1337 spin_unlock(&br->multicast_lock);
1338}
1339
474ddb37 1340struct net_bridge_group_src *
8b671779
NA		 1341br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1342{
1343 struct net_bridge_group_src *ent;
1344
1345 switch (ip->proto) {
1346 case htons(ETH_P_IP):
1347 hlist_for_each_entry(ent, &pg->src_list, node)
deb96566 1348 if (ip->src.ip4 == ent->addr.src.ip4)
8b671779
NA		 1349 return ent;
1350 break;
1351#if IS_ENABLED(CONFIG_IPV6)
1352 case htons(ETH_P_IPV6):
1353 hlist_for_each_entry(ent, &pg->src_list, node)
deb96566 1354 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
8b671779
NA		 1355 return ent;
1356 break;
1357#endif
1358 }
1359
1360 return NULL;
1361}
1362
fd0c6961 1363struct net_bridge_group_src *
8b671779
NA		 1364br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1365{
1366 struct net_bridge_group_src *grp_src;
1367
1368 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1369 return NULL;
1370
1371 switch (src_ip->proto) {
1372 case htons(ETH_P_IP):
deb96566
NA		 1373 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1374 ipv4_is_multicast(src_ip->src.ip4))
8b671779
NA		 1375 return NULL;
1376 break;
1377#if IS_ENABLED(CONFIG_IPV6)
1378 case htons(ETH_P_IPV6):
deb96566
NA		 1379 if (ipv6_addr_any(&src_ip->src.ip6) ||
1380 ipv6_addr_is_multicast(&src_ip->src.ip6))
8b671779
NA		 1381 return NULL;
1382 break;
1383#endif
1384 }
1385
1386 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1387 if (unlikely(!grp_src))
1388 return NULL;
1389
1390 grp_src->pg = pg;
085b53c8 1391 grp_src->br = pg->key.port->br;
8b671779 1392 grp_src->addr = *src_ip;
e12cec65 1393 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
8b671779
NA		 1394 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1395
1396 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1397 pg->src_ents++;
1398
1399 return grp_src;
1400}
1401
cfd56754
CW		 1402struct net_bridge_port_group *br_multicast_new_port_group(
1403 struct net_bridge_port *port,
f86c3e2c 1404 const struct br_ip *group,
ccb1c31a 1405 struct net_bridge_port_group __rcu *next,
6db6f0ea 1406 unsigned char flags,
8b671779 1407 const unsigned char *src,
8f8cb77e 1408 u8 filter_mode,
60977a0c
PM		 1409 u8 rt_protocol,
1410 struct netlink_ext_ack *extack)
cfd56754
CW		 1411{
1412 struct net_bridge_port_group *p;
b57e8d87
PM		 1413 int err;
1414
1415 err = br_multicast_port_ngroups_inc(port, group, extack);
1416 if (err)
1417 return NULL;
cfd56754
CW		 1418
1419 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1c85b80b
PM		 1420 if (unlikely(!p)) {
1421 NL_SET_ERR_MSG_MOD(extack, "Couldn't allocate new port group");
b57e8d87 1422 goto dec_out;
1c85b80b 1423 }
cfd56754 1424
085b53c8
NA		 1425 p->key.addr = *group;
1426 p->key.port = port;
9d06b6d8 1427 p->flags = flags;
8b671779 1428 p->filter_mode = filter_mode;
8f8cb77e 1429 p->rt_protocol = rt_protocol;
5b163288 1430 p->eht_host_tree = RB_ROOT;
baa74d39 1431 p->eht_set_tree = RB_ROOT;
e12cec65 1432 p->mcast_gc.destroy = br_multicast_destroy_port_group;
8b671779 1433 INIT_HLIST_HEAD(&p->src_list);
085b53c8
NA		 1434
1435 if (!br_multicast_is_star_g(group) &&
1436 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1437 br_sg_port_rht_params)) {
1c85b80b 1438 NL_SET_ERR_MSG_MOD(extack, "Couldn't insert new port group");
eceb3085 1439 goto free_out;
085b53c8
NA		 1440 }
1441
eca2a43b 1442 rcu_assign_pointer(p->next, next);
88c1f37f 1443 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
42c11ccf
NA		 1444 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1445 hlist_add_head(&p->mglist, &port->mglist);
6db6f0ea
FF		 1446
1447 if (src)
1448 memcpy(p->eth_addr, src, ETH_ALEN);
1449 else
1bfe45f4 1450 eth_broadcast_addr(p->eth_addr);
6db6f0ea 1451
cfd56754 1452 return p;
eceb3085
PM		 1453
1454free_out:
1455 kfree(p);
b57e8d87
PM		 1456dec_out:
1457 br_multicast_port_ngroups_dec(port, group->vid);
eceb3085 1458 return NULL;
cfd56754
CW		 1459}
1460
976b3858
PM		 1461void br_multicast_del_port_group(struct net_bridge_port_group *p)
1462{
1463 struct net_bridge_port *port = p->key.port;
b57e8d87 1464 __u16 vid = p->key.addr.vid;
976b3858
PM		 1465
1466 hlist_del_init(&p->mglist);
1467 if (!br_multicast_is_star_g(&p->key.addr))
1468 rhashtable_remove_fast(&port->br->sg_port_tbl, &p->rhnode,
1469 br_sg_port_rht_params);
1470 kfree(p);
b57e8d87 1471 br_multicast_port_ngroups_dec(port, vid);
976b3858
PM		 1472}
1473
58d913a3
NA		 1474void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1475 struct net_bridge_mdb_entry *mp, bool notify)
1bc844ee
NA		 1476{
1477 if (!mp->host_joined) {
1478 mp->host_joined = true;
094b82fd
NA		 1479 if (br_multicast_is_star_g(&mp->addr))
1480 br_multicast_star_g_host_state(mp);
1bc844ee 1481 if (notify)
81f19838 1482 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1bc844ee 1483 }
955062b0
NA		 1484
1485 if (br_group_is_l2(&mp->addr))
1486 return;
1487
58d913a3 1488 mod_timer(&mp->timer, jiffies + brmctx->multicast_membership_interval);
1bc844ee
NA		 1489}
1490
1491void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1492{
1493 if (!mp->host_joined)
1494 return;
1495
1496 mp->host_joined = false;
094b82fd
NA		 1497 if (br_multicast_is_star_g(&mp->addr))
1498 br_multicast_star_g_host_state(mp);
1bc844ee 1499 if (notify)
81f19838 1500 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1bc844ee
NA		 1501}
1502
b0812368 1503static struct net_bridge_port_group *
adc47037
NA		 1504__br_multicast_add_group(struct net_bridge_mcast *brmctx,
1505 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 1506 struct br_ip *group,
1507 const unsigned char *src,
1508 u8 filter_mode,
9116ffbf
NA		 1509 bool igmpv2_mldv1,
1510 bool blocked)
eb1d1641 1511{
e8051688 1512 struct net_bridge_port_group __rcu **pp;
b0812368 1513 struct net_bridge_port_group *p = NULL;
5e923585 1514 struct net_bridge_mdb_entry *mp;
454594f3 1515 unsigned long now = jiffies;
eb1d1641 1516
4cdd0d10 1517 if (!br_multicast_ctx_should_use(brmctx, pmctx))
eb1d1641
HX		 1518 goto out;
1519
adc47037 1520 mp = br_multicast_new_group(brmctx->br, group);
4c0833bc 1521 if (IS_ERR(mp))
1697291d 1522 return ERR_CAST(mp);
eb1d1641 1523
adc47037 1524 if (!pmctx) {
58d913a3 1525 br_multicast_host_join(brmctx, mp, true);
eb1d1641
HX		 1526 goto out;
1527 }
1528
e8051688 1529 for (pp = &mp->ports;
adc47037 1530 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 1531 pp = &p->next) {
adc47037 1532 if (br_port_group_equal(p, pmctx->port, src))
454594f3 1533 goto found;
adc47037 1534 if ((unsigned long)p->key.port < (unsigned long)pmctx->port)
eb1d1641
HX		 1535 break;
1536 }
1537
adc47037 1538 p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src,
60977a0c 1539 filter_mode, RTPROT_KERNEL, NULL);
b0812368
NA		 1540 if (unlikely(!p)) {
1541 p = ERR_PTR(-ENOMEM);
1542 goto out;
1543 }
eb1d1641 1544 rcu_assign_pointer(*pp, p);
9116ffbf
NA		 1545 if (blocked)
1546 p->flags |= MDB_PG_FLAGS_BLOCKED;
adc47037 1547 br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB);
eb1d1641 1548
454594f3 1549found:
0436862e 1550 if (igmpv2_mldv1)
d3d065c0 1551 mod_timer(&p->timer,
adc47037 1552 now + brmctx->multicast_membership_interval);
81f19838 1553
eb1d1641 1554out:
b0812368
NA		 1555 return p;
1556}
1557
adc47037
NA		 1558static int br_multicast_add_group(struct net_bridge_mcast *brmctx,
1559 struct net_bridge_mcast_port *pmctx,
b0812368
NA		 1560 struct br_ip *group,
1561 const unsigned char *src,
1562 u8 filter_mode,
1563 bool igmpv2_mldv1)
1564{
1565 struct net_bridge_port_group *pg;
1566 int err;
eb1d1641 1567
adc47037
NA		 1568 spin_lock(&brmctx->br->multicast_lock);
1569 pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode,
9116ffbf 1570 igmpv2_mldv1, false);
b0812368 1571 /* NULL is considered valid for host joined groups */
8d21c882 1572 err = PTR_ERR_OR_ZERO(pg);
adc47037 1573 spin_unlock(&brmctx->br->multicast_lock);
b0812368 1574
eb1d1641
HX		 1575 return err;
1576}
1577
adc47037
NA		 1578static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx,
1579 struct net_bridge_mcast_port *pmctx,
b0e9a30d 1580 __be32 group,
6db6f0ea 1581 __u16 vid,
8b671779
NA		 1582 const unsigned char *src,
1583 bool igmpv2)
8ef2a9a5
YH		 1584{
1585 struct br_ip br_group;
8b671779 1586 u8 filter_mode;
8ef2a9a5
YH		 1587
1588 if (ipv4_is_local_multicast(group))
1589 return 0;
1590
1515a63f 1591 memset(&br_group, 0, sizeof(br_group));
eab3227b 1592 br_group.dst.ip4 = group;
8ef2a9a5 1593 br_group.proto = htons(ETH_P_IP);
b0e9a30d 1594 br_group.vid = vid;
8b671779 1595 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
8ef2a9a5 1596
adc47037
NA		 1597 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1598 filter_mode, igmpv2);
8ef2a9a5
YH		 1599}
1600
dfd56b8b 1601#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 1602static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx,
1603 struct net_bridge_mcast_port *pmctx,
b0e9a30d 1604 const struct in6_addr *group,
6db6f0ea 1605 __u16 vid,
8b671779
NA		 1606 const unsigned char *src,
1607 bool mldv1)
08b202b6
YH		 1608{
1609 struct br_ip br_group;
8b671779 1610 u8 filter_mode;
08b202b6 1611
3c3769e6 1612 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 1613 return 0;
1614
19e3a9c9 1615 memset(&br_group, 0, sizeof(br_group));
eab3227b 1616 br_group.dst.ip6 = *group;
9cc6e0c4 1617 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 1618 br_group.vid = vid;
8b671779 1619 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
08b202b6 1620
adc47037
NA		 1621 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1622 filter_mode, mldv1);
08b202b6
YH		 1623}
1624#endif
1625
ed2d3597
LL		 1626static bool br_multicast_rport_del(struct hlist_node *rlist)
1627{
1628 if (hlist_unhashed(rlist))
1629 return false;
1630
1631 hlist_del_init_rcu(rlist);
1632 return true;
1633}
1634
adc47037 1635static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
ed2d3597 1636{
adc47037 1637 return br_multicast_rport_del(&pmctx->ip4_rlist);
ed2d3597
LL		 1638}
1639
adc47037 1640static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 1641{
1642#if IS_ENABLED(CONFIG_IPV6)
adc47037 1643 return br_multicast_rport_del(&pmctx->ip6_rlist);
a3c02e76
LL		 1644#else
1645 return false;
1646#endif
1647}
1648
9632233e 1649static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx,
ee5fb222
LL		 1650 struct timer_list *t,
1651 struct hlist_node *rlist)
eb1d1641 1652{
9632233e 1653 struct net_bridge *br = pmctx->port->br;
ed2d3597 1654 bool del;
eb1d1641
HX		 1655
1656 spin_lock(&br->multicast_lock);
9632233e
NA		 1657 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1658 pmctx->multicast_router == MDB_RTR_TYPE_PERM ||
ee5fb222 1659 timer_pending(t))
eb1d1641
HX		 1660 goto out;
1661
ed2d3597 1662 del = br_multicast_rport_del(rlist);
adc47037 1663 br_multicast_rport_del_notify(pmctx, del);
eb1d1641
HX		 1664out:
1665 spin_unlock(&br->multicast_lock);
1666}
1667
ee5fb222
LL		 1668static void br_ip4_multicast_router_expired(struct timer_list *t)
1669{
9632233e
NA		 1670 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1671 ip4_mc_router_timer);
ee5fb222 1672
9632233e 1673 br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist);
ee5fb222
LL		 1674}
1675
a3c02e76
LL		 1676#if IS_ENABLED(CONFIG_IPV6)
1677static void br_ip6_multicast_router_expired(struct timer_list *t)
1678{
9632233e
NA		 1679 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1680 ip6_mc_router_timer);
a3c02e76 1681
9632233e 1682 br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist);
a3c02e76
LL		 1683}
1684#endif
1685
77041420
YG		 1686static void br_mc_router_state_change(struct net_bridge *p,
1687 bool is_mc_router)
1688{
1689 struct switchdev_attr attr = {
1690 .orig_dev = p->dev,
1691 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1692 .flags = SWITCHDEV_F_DEFER,
1693 .u.mrouter = is_mc_router,
1694 };
1695
dcbdf135 1696 switchdev_port_attr_set(p->dev, &attr, NULL);
77041420
YG		 1697}
1698
d3d065c0 1699static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx,
ee5fb222 1700 struct timer_list *timer)
eb1d1641 1701{
d3d065c0
NA		 1702 spin_lock(&brmctx->br->multicast_lock);
1703 if (brmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1704 brmctx->multicast_router == MDB_RTR_TYPE_PERM ||
1705 br_ip4_multicast_is_router(brmctx) ||
1706 br_ip6_multicast_is_router(brmctx))
77041420
YG		 1707 goto out;
1708
d3d065c0 1709 br_mc_router_state_change(brmctx->br, false);
77041420 1710out:
d3d065c0 1711 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 1712}
1713
ee5fb222
LL		 1714static void br_ip4_multicast_local_router_expired(struct timer_list *t)
1715{
d3d065c0
NA		 1716 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1717 ip4_mc_router_timer);
ee5fb222 1718
d3d065c0 1719 br_multicast_local_router_expired(brmctx, t);
ee5fb222
LL		 1720}
1721
a3c02e76
LL		 1722#if IS_ENABLED(CONFIG_IPV6)
1723static void br_ip6_multicast_local_router_expired(struct timer_list *t)
1724{
d3d065c0
NA		 1725 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1726 ip6_mc_router_timer);
a3c02e76 1727
d3d065c0 1728 br_multicast_local_router_expired(brmctx, t);
a3c02e76
LL		 1729}
1730#endif
1731
d3d065c0 1732static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx,
90010b36 1733 struct bridge_mcast_own_query *query)
c83b8fab 1734{
d3d065c0
NA		 1735 spin_lock(&brmctx->br->multicast_lock);
1736 if (!netif_running(brmctx->br->dev) ||
4cdd0d10 1737 br_multicast_ctx_vlan_global_disabled(brmctx) ||
d3d065c0 1738 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
c83b8fab
HX		 1739 goto out;
1740
adc47037 1741 br_multicast_start_querier(brmctx, query);
c83b8fab
HX		 1742
1743out:
d3d065c0 1744 spin_unlock(&brmctx->br->multicast_lock);
c83b8fab
HX		 1745}
1746
88c1f37f 1747static void br_ip4_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1748{
d3d065c0
NA		 1749 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1750 ip4_other_query.timer);
cc0fdd80 1751
d3d065c0 1752 br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query);
cc0fdd80
LL		 1753}
1754
1755#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1756static void br_ip6_multicast_querier_expired(struct timer_list *t)
cc0fdd80 1757{
d3d065c0
NA		 1758 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1759 ip6_other_query.timer);
cc0fdd80 1760
d3d065c0 1761 br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query);
cc0fdd80
LL		 1762}
1763#endif
1764
f5c3eb4b
LL		 1765static void br_multicast_query_delay_expired(struct timer_list *t)
1766{
1767}
1768
adc47037 1769static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx,
dc4eb53a
LL		 1770 struct br_ip *ip,
1771 struct sk_buff *skb)
1772{
1773 if (ip->proto == htons(ETH_P_IP))
d3d065c0 1774 brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
dc4eb53a
LL		 1775#if IS_ENABLED(CONFIG_IPV6)
1776 else
d3d065c0 1777 brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
dc4eb53a
LL		 1778#endif
1779}
1780
adc47037
NA		 1781static void __br_multicast_send_query(struct net_bridge_mcast *brmctx,
1782 struct net_bridge_mcast_port *pmctx,
438ef2d0
NA		 1783 struct net_bridge_port_group *pg,
1784 struct br_ip *ip_dst,
1785 struct br_ip *group,
1786 bool with_srcs,
42c11ccf
NA		 1787 u8 sflag,
1788 bool *need_rexmit)
eb1d1641 1789{
438ef2d0 1790 bool over_lmqt = !!sflag;
eb1d1641 1791 struct sk_buff *skb;
1080ab95 1792 u8 igmp_type;
eb1d1641 1793
cb486ce9
NA		 1794 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1795 !br_multicast_ctx_matches_vlan_snooping(brmctx))
615cc23e
NA		 1796 return;
1797
438ef2d0 1798again_under_lmqt:
615cc23e
NA		 1799 skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group,
1800 with_srcs, over_lmqt, sflag, &igmp_type,
42c11ccf 1801 need_rexmit);
eb1d1641 1802 if (!skb)
8ef2a9a5 1803 return;
eb1d1641 1804
adc47037
NA		 1805 if (pmctx) {
1806 skb->dev = pmctx->port->dev;
1807 br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type,
1080ab95 1808 BR_MCAST_DIR_TX);
29a26a56 1809 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
adc47037 1810 dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev,
f0b4eece 1811 br_dev_queue_push_xmit);
438ef2d0
NA		 1812
1813 if (over_lmqt && with_srcs && sflag) {
1814 over_lmqt = false;
1815 goto again_under_lmqt;
1816 }
dc4eb53a 1817 } else {
adc47037
NA		 1818 br_multicast_select_own_querier(brmctx, group, skb);
1819 br_multicast_count(brmctx->br, NULL, skb, igmp_type,
1080ab95 1820 BR_MCAST_DIR_RX);
eb1d1641 1821 netif_rx(skb);
dc4eb53a 1822 }
8ef2a9a5
YH		 1823}
1824
67b746f9
NA		 1825static void br_multicast_read_querier(const struct bridge_mcast_querier *querier,
1826 struct bridge_mcast_querier *dest)
1827{
1828 unsigned int seq;
1829
1830 memset(dest, 0, sizeof(*dest));
1831 do {
1832 seq = read_seqcount_begin(&querier->seq);
1833 dest->port_ifidx = querier->port_ifidx;
1834 memcpy(&dest->addr, &querier->addr, sizeof(struct br_ip));
1835 } while (read_seqcount_retry(&querier->seq, seq));
1836}
1837
1838static void br_multicast_update_querier(struct net_bridge_mcast *brmctx,
1839 struct bridge_mcast_querier *querier,
1840 int ifindex,
1841 struct br_ip *saddr)
1842{
67b746f9
NA		 1843 write_seqcount_begin(&querier->seq);
1844 querier->port_ifidx = ifindex;
1845 memcpy(&querier->addr, saddr, sizeof(*saddr));
1846 write_seqcount_end(&querier->seq);
1847}
1848
adc47037
NA		 1849static void br_multicast_send_query(struct net_bridge_mcast *brmctx,
1850 struct net_bridge_mcast_port *pmctx,
90010b36 1851 struct bridge_mcast_own_query *own_query)
8ef2a9a5 1852{
90010b36 1853 struct bridge_mcast_other_query *other_query = NULL;
67b746f9 1854 struct bridge_mcast_querier *querier;
5e923585
NA		 1855 struct br_ip br_group;
1856 unsigned long time;
8ef2a9a5 1857
4cdd0d10 1858 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
adc47037 1859 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
4d5b4e84 1860 !brmctx->multicast_querier)
8ef2a9a5
YH		 1861 return;
1862
eab3227b 1863 memset(&br_group.dst, 0, sizeof(br_group.dst));
08b202b6 1864
adc47037
NA		 1865 if (pmctx ? (own_query == &pmctx->ip4_own_query) :
1866 (own_query == &brmctx->ip4_own_query)) {
67b746f9 1867 querier = &brmctx->ip4_querier;
d3d065c0 1868 other_query = &brmctx->ip4_other_query;
cc0fdd80 1869 br_group.proto = htons(ETH_P_IP);
dfd56b8b 1870#if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 1871 } else {
67b746f9 1872 querier = &brmctx->ip6_querier;
d3d065c0 1873 other_query = &brmctx->ip6_other_query;
cc0fdd80 1874 br_group.proto = htons(ETH_P_IPV6);
08b202b6 1875#endif
cc0fdd80
LL		 1876 }
1877
90010b36 1878 if (!other_query || timer_pending(&other_query->timer))
cc0fdd80
LL		 1879 return;
1880
67b746f9
NA		 1881 /* we're about to select ourselves as querier */
1882 if (!pmctx && querier->port_ifidx) {
1883 struct br_ip zeroip = {};
1884
1885 br_multicast_update_querier(brmctx, querier, 0, &zeroip);
1886 }
1887
adc47037
NA		 1888 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false,
1889 0, NULL);
eb1d1641 1890
eb1d1641 1891 time = jiffies;
d3d065c0
NA		 1892 time += own_query->startup_sent < brmctx->multicast_startup_query_count ?
1893 brmctx->multicast_startup_query_interval :
1894 brmctx->multicast_query_interval;
90010b36 1895 mod_timer(&own_query->timer, time);
eb1d1641
HX		 1896}
1897
90010b36 1898static void
9632233e 1899br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx,
90010b36 1900 struct bridge_mcast_own_query *query)
eb1d1641 1901{
9632233e 1902 struct net_bridge *br = pmctx->port->br;
4cdd0d10 1903 struct net_bridge_mcast *brmctx;
eb1d1641
HX		 1904
1905 spin_lock(&br->multicast_lock);
4cdd0d10 1906 if (br_multicast_port_ctx_state_stopped(pmctx))
eb1d1641 1907 goto out;
615cc23e 1908
4cdd0d10
NA		 1909 brmctx = br_multicast_port_ctx_get_global(pmctx);
1910 if (query->startup_sent < brmctx->multicast_startup_query_count)
cc0fdd80 1911 query->startup_sent++;
eb1d1641 1912
4cdd0d10 1913 br_multicast_send_query(brmctx, pmctx, query);
eb1d1641
HX		 1914
1915out:
1916 spin_unlock(&br->multicast_lock);
1917}
1918
88c1f37f 1919static void br_ip4_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1920{
9632233e
NA		 1921 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1922 ip4_own_query.timer);
cc0fdd80 1923
9632233e 1924 br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query);
cc0fdd80
LL		 1925}
1926
1927#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 1928static void br_ip6_multicast_port_query_expired(struct timer_list *t)
cc0fdd80 1929{
9632233e
NA		 1930 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1931 ip6_own_query.timer);
cc0fdd80 1932
9632233e 1933 br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query);
cc0fdd80
LL		 1934}
1935#endif
1936
42c11ccf
NA		 1937static void br_multicast_port_group_rexmit(struct timer_list *t)
1938{
1939 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1940 struct bridge_mcast_other_query *other_query = NULL;
085b53c8 1941 struct net_bridge *br = pg->key.port->br;
adc47037
NA		 1942 struct net_bridge_mcast_port *pmctx;
1943 struct net_bridge_mcast *brmctx;
42c11ccf
NA		 1944 bool need_rexmit = false;
1945
1946 spin_lock(&br->multicast_lock);
1947 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
4d5b4e84 1948 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
42c11ccf
NA		 1949 goto out;
1950
eb1593a0
NA		 1951 pmctx = br_multicast_pg_to_port_ctx(pg);
1952 if (!pmctx)
1953 goto out;
1954 brmctx = br_multicast_port_ctx_get_global(pmctx);
4d5b4e84
NA		 1955 if (!brmctx->multicast_querier)
1956 goto out;
1957
085b53c8 1958 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 1959 other_query = &brmctx->ip4_other_query;
42c11ccf
NA		 1960#if IS_ENABLED(CONFIG_IPV6)
1961 else
d3d065c0 1962 other_query = &brmctx->ip6_other_query;
42c11ccf
NA		 1963#endif
1964
1965 if (!other_query || timer_pending(&other_query->timer))
1966 goto out;
1967
1968 if (pg->grp_query_rexmit_cnt) {
1969 pg->grp_query_rexmit_cnt--;
adc47037 1970 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1971 &pg->key.addr, false, 1, NULL);
42c11ccf 1972 }
adc47037 1973 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 1974 &pg->key.addr, true, 0, &need_rexmit);
42c11ccf
NA		 1975
1976 if (pg->grp_query_rexmit_cnt || need_rexmit)
1977 mod_timer(&pg->rexmit_timer, jiffies +
d3d065c0 1978 brmctx->multicast_last_member_interval);
42c11ccf
NA		 1979out:
1980 spin_unlock(&br->multicast_lock);
1981}
1982
ae1ea84b
FF		 1983static int br_mc_disabled_update(struct net_device *dev, bool value,
1984 struct netlink_ext_ack *extack)
147c1e9b
NF		 1985{
1986 struct switchdev_attr attr = {
1987 .orig_dev = dev,
1988 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1989 .flags = SWITCHDEV_F_DEFER,
13cefad2 1990 .u.mc_disabled = !value,
147c1e9b
NF		 1991 };
1992
ae1ea84b 1993 return switchdev_port_attr_set(dev, &attr, extack);
147c1e9b
NF		 1994}
1995
613d61db
NA		 1996void br_multicast_port_ctx_init(struct net_bridge_port *port,
1997 struct net_bridge_vlan *vlan,
1998 struct net_bridge_mcast_port *pmctx)
eb1d1641 1999{
9632233e 2000 pmctx->port = port;
613d61db 2001 pmctx->vlan = vlan;
9632233e
NA		 2002 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
2003 timer_setup(&pmctx->ip4_mc_router_timer,
ee5fb222 2004 br_ip4_multicast_router_expired, 0);
9632233e 2005 timer_setup(&pmctx->ip4_own_query.timer,
88c1f37f 2006 br_ip4_multicast_port_query_expired, 0);
cc0fdd80 2007#if IS_ENABLED(CONFIG_IPV6)
9632233e 2008 timer_setup(&pmctx->ip6_mc_router_timer,
a3c02e76 2009 br_ip6_multicast_router_expired, 0);
9632233e 2010 timer_setup(&pmctx->ip6_own_query.timer,
88c1f37f 2011 br_ip6_multicast_port_query_expired, 0);
cc0fdd80 2012#endif
9632233e
NA		 2013}
2014
613d61db 2015void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
9632233e
NA		 2016{
2017#if IS_ENABLED(CONFIG_IPV6)
2018 del_timer_sync(&pmctx->ip6_mc_router_timer);
2019#endif
2020 del_timer_sync(&pmctx->ip4_mc_router_timer);
2021}
2022
2023int br_multicast_add_port(struct net_bridge_port *port)
2024{
2025 int err;
2026
2027 port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
613d61db 2028 br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx);
9632233e 2029
ae1ea84b
FF		 2030 err = br_mc_disabled_update(port->dev,
2031 br_opt_get(port->br,
2032 BROPT_MULTICAST_ENABLED),
2033 NULL);
68f5c12a 2034 if (err && err != -EOPNOTSUPP)
ae1ea84b 2035 return err;
147c1e9b 2036
1080ab95
NA		 2037 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2038 if (!port->mcast_stats)
2039 return -ENOMEM;
2040
2041 return 0;
eb1d1641
HX		 2042}
2043
2044void br_multicast_del_port(struct net_bridge_port *port)
2045{
e10177ab
SA		 2046 struct net_bridge *br = port->br;
2047 struct net_bridge_port_group *pg;
e12cec65 2048 HLIST_HEAD(deleted_head);
e10177ab
SA		 2049 struct hlist_node *n;
2050
2051 /* Take care of the remaining groups, only perm ones should be left */
2052 spin_lock_bh(&br->multicast_lock);
2053 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
681590bd 2054 br_multicast_find_del_pg(br, pg);
e12cec65 2055 hlist_move_list(&br->mcast_gc_list, &deleted_head);
e10177ab 2056 spin_unlock_bh(&br->multicast_lock);
e12cec65 2057 br_multicast_gc(&deleted_head);
9632233e 2058 br_multicast_port_ctx_deinit(&port->multicast_ctx);
1080ab95 2059 free_percpu(port->mcast_stats);
eb1d1641
HX		 2060}
2061
90010b36 2062static void br_multicast_enable(struct bridge_mcast_own_query *query)
561f1103 2063{
cc0fdd80 2064 query->startup_sent = 0;
561f1103 2065
cc0fdd80
LL		 2066 if (try_to_del_timer_sync(&query->timer) >= 0 ||
2067 del_timer(&query->timer))
2068 mod_timer(&query->timer, jiffies);
561f1103
HX		 2069}
2070
adc47037 2071static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx)
eb1d1641 2072{
adc47037 2073 struct net_bridge *br = pmctx->port->br;
7b54aaaf 2074 struct net_bridge_mcast *brmctx;
eb1d1641 2075
7b54aaaf
NA		 2076 brmctx = br_multicast_port_ctx_get_global(pmctx);
2077 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
2078 !netif_running(br->dev))
7cb3f921 2079 return;
eb1d1641 2080
adc47037 2081 br_multicast_enable(&pmctx->ip4_own_query);
cc0fdd80 2082#if IS_ENABLED(CONFIG_IPV6)
adc47037 2083 br_multicast_enable(&pmctx->ip6_own_query);
cc0fdd80 2084#endif
adc47037
NA		 2085 if (pmctx->multicast_router == MDB_RTR_TYPE_PERM) {
2086 br_ip4_multicast_add_router(brmctx, pmctx);
2087 br_ip6_multicast_add_router(brmctx, pmctx);
a3c02e76 2088 }
b57e8d87
PM		 2089
2090 if (br_multicast_port_ctx_is_vlan(pmctx)) {
2091 struct net_bridge_port_group *pg;
2092 u32 n = 0;
2093
2094 /* The mcast_n_groups counter might be wrong. First,
2095 * BR_VLFLAG_MCAST_ENABLED is toggled before temporary entries
2096 * are flushed, thus mcast_n_groups after the toggle does not
2097 * reflect the true values. And second, permanent entries added
2098 * while BR_VLFLAG_MCAST_ENABLED was disabled, are not reflected
2099 * either. Thus we have to refresh the counter.
2100 */
2101
2102 hlist_for_each_entry(pg, &pmctx->port->mglist, mglist) {
2103 if (pg->key.addr.vid == pmctx->vlan->vid)
2104 n++;
2105 }
2106 WRITE_ONCE(pmctx->mdb_n_entries, n);
2107 }
7cb3f921 2108}
eb1d1641 2109
7cb3f921
NA		 2110void br_multicast_enable_port(struct net_bridge_port *port)
2111{
2112 struct net_bridge *br = port->br;
2113
f4b7002a 2114 spin_lock_bh(&br->multicast_lock);
adc47037 2115 __br_multicast_enable_port_ctx(&port->multicast_ctx);
f4b7002a 2116 spin_unlock_bh(&br->multicast_lock);
eb1d1641
HX		 2117}
2118
7b54aaaf 2119static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx)
eb1d1641 2120{
eb1d1641 2121 struct net_bridge_port_group *pg;
b67bfe0d 2122 struct hlist_node *n;
ed2d3597 2123 bool del = false;
eb1d1641 2124
7b54aaaf
NA		 2125 hlist_for_each_entry_safe(pg, n, &pmctx->port->mglist, mglist)
2126 if (!(pg->flags & MDB_PG_FLAGS_PERMANENT) &&
2127 (!br_multicast_port_ctx_is_vlan(pmctx) ||
2128 pg->key.addr.vid == pmctx->vlan->vid))
2129 br_multicast_find_del_pg(pmctx->port->br, pg);
eb1d1641 2130
adc47037
NA		 2131 del |= br_ip4_multicast_rport_del(pmctx);
2132 del_timer(&pmctx->ip4_mc_router_timer);
2133 del_timer(&pmctx->ip4_own_query.timer);
2134 del |= br_ip6_multicast_rport_del(pmctx);
cc0fdd80 2135#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 2136 del_timer(&pmctx->ip6_mc_router_timer);
2137 del_timer(&pmctx->ip6_own_query.timer);
cc0fdd80 2138#endif
adc47037 2139 br_multicast_rport_del_notify(pmctx, del);
7b54aaaf
NA		 2140}
2141
2142void br_multicast_disable_port(struct net_bridge_port *port)
2143{
f4b7002a 2144 spin_lock_bh(&port->br->multicast_lock);
7b54aaaf 2145 __br_multicast_disable_port_ctx(&port->multicast_ctx);
f4b7002a 2146 spin_unlock_bh(&port->br->multicast_lock);
eb1d1641
HX		 2147}
2148
e6231bca
NA		 2149static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
2150{
2151 struct net_bridge_group_src *ent;
2152 struct hlist_node *tmp;
2153 int deleted = 0;
2154
2155 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
2156 if (ent->flags & BR_SGRP_F_DELETE) {
d5a10222 2157 br_multicast_del_group_src(ent, false);
e6231bca
NA		 2158 deleted++;
2159 }
2160
2161 return deleted;
2162}
2163
b0812368
NA		 2164static void __grp_src_mod_timer(struct net_bridge_group_src *src,
2165 unsigned long expires)
2166{
2167 mod_timer(&src->timer, expires);
2168 br_multicast_fwd_src_handle(src);
2169}
2170
adc47037
NA		 2171static void __grp_src_query_marked_and_rexmit(struct net_bridge_mcast *brmctx,
2172 struct net_bridge_mcast_port *pmctx,
2173 struct net_bridge_port_group *pg)
5bf1e00b
NA		 2174{
2175 struct bridge_mcast_other_query *other_query = NULL;
d3d065c0 2176 u32 lmqc = brmctx->multicast_last_member_count;
5bf1e00b
NA		 2177 unsigned long lmqt, lmi, now = jiffies;
2178 struct net_bridge_group_src *ent;
2179
adc47037
NA		 2180 if (!netif_running(brmctx->br->dev) ||
2181 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
5bf1e00b
NA		 2182 return;
2183
085b53c8 2184 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 2185 other_query = &brmctx->ip4_other_query;
5bf1e00b
NA		 2186#if IS_ENABLED(CONFIG_IPV6)
2187 else
d3d065c0 2188 other_query = &brmctx->ip6_other_query;
5bf1e00b
NA		 2189#endif
2190
adc47037 2191 lmqt = now + br_multicast_lmqt(brmctx);
5bf1e00b
NA		 2192 hlist_for_each_entry(ent, &pg->src_list, node) {
2193 if (ent->flags & BR_SGRP_F_SEND) {
2194 ent->flags &= ~BR_SGRP_F_SEND;
2195 if (ent->timer.expires > lmqt) {
4d5b4e84 2196 if (brmctx->multicast_querier &&
5bf1e00b
NA		 2197 other_query &&
2198 !timer_pending(&other_query->timer))
2199 ent->src_query_rexmit_cnt = lmqc;
b0812368 2200 __grp_src_mod_timer(ent, lmqt);
5bf1e00b
NA		 2201 }
2202 }
2203 }
2204
4d5b4e84 2205 if (!brmctx->multicast_querier ||
5bf1e00b
NA		 2206 !other_query || timer_pending(&other_query->timer))
2207 return;
2208
adc47037 2209 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 2210 &pg->key.addr, true, 1, NULL);
5bf1e00b 2211
d3d065c0 2212 lmi = now + brmctx->multicast_last_member_interval;
5bf1e00b
NA		 2213 if (!timer_pending(&pg->rexmit_timer) ||
2214 time_after(pg->rexmit_timer.expires, lmi))
2215 mod_timer(&pg->rexmit_timer, lmi);
2216}
2217
adc47037
NA		 2218static void __grp_send_query_and_rexmit(struct net_bridge_mcast *brmctx,
2219 struct net_bridge_mcast_port *pmctx,
2220 struct net_bridge_port_group *pg)
5bf1e00b
NA		 2221{
2222 struct bridge_mcast_other_query *other_query = NULL;
5bf1e00b
NA		 2223 unsigned long now = jiffies, lmi;
2224
adc47037
NA		 2225 if (!netif_running(brmctx->br->dev) ||
2226 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
5bf1e00b
NA		 2227 return;
2228
085b53c8 2229 if (pg->key.addr.proto == htons(ETH_P_IP))
d3d065c0 2230 other_query = &brmctx->ip4_other_query;
5bf1e00b
NA		 2231#if IS_ENABLED(CONFIG_IPV6)
2232 else
d3d065c0 2233 other_query = &brmctx->ip6_other_query;
5bf1e00b
NA		 2234#endif
2235
4d5b4e84 2236 if (brmctx->multicast_querier &&
5bf1e00b 2237 other_query && !timer_pending(&other_query->timer)) {
d3d065c0
NA		 2238 lmi = now + brmctx->multicast_last_member_interval;
2239 pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1;
adc47037 2240 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
085b53c8 2241 &pg->key.addr, false, 0, NULL);
5bf1e00b
NA		 2242 if (!timer_pending(&pg->rexmit_timer) ||
2243 time_after(pg->rexmit_timer.expires, lmi))
2244 mod_timer(&pg->rexmit_timer, lmi);
2245 }
2246
2247 if (pg->filter_mode == MCAST_EXCLUDE &&
2248 (!timer_pending(&pg->timer) ||
adc47037
NA		 2249 time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx))))
2250 mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx));
5bf1e00b
NA		 2251}
2252
0436862e
NA		 2253/* State Msg type New state Actions
2254 * INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
2255 * INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
2256 * EXCLUDE (X,Y) ALLOW (A) EXCLUDE (X+A,Y-A) (A)=GMI
2257 */
adc47037
NA		 2258static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx,
2259 struct net_bridge_port_group *pg, void *h_addr,
474ddb37
NA		 2260 void *srcs, u32 nsrcs, size_t addr_size,
2261 int grec_type)
0436862e 2262{
0436862e
NA		 2263 struct net_bridge_group_src *ent;
2264 unsigned long now = jiffies;
2265 bool changed = false;
2266 struct br_ip src_ip;
2267 u32 src_idx;
2268
2269 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2270 src_ip.proto = pg->key.addr.proto;
0436862e 2271 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2272 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
0436862e
NA		 2273 ent = br_multicast_find_group_src(pg, &src_ip);
2274 if (!ent) {
2275 ent = br_multicast_new_group_src(pg, &src_ip);
2276 if (ent)
2277 changed = true;
2278 }
2279
2280 if (ent)
adc47037 2281 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
0436862e
NA		 2282 }
2283
adc47037
NA		 2284 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2285 grec_type))
474ddb37
NA		 2286 changed = true;
2287
0436862e
NA		 2288 return changed;
2289}
2290
e6231bca
NA		 2291/* State Msg type New state Actions
2292 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2293 * Delete (A-B)
2294 * Group Timer=GMI
2295 */
adc47037
NA		 2296static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx,
2297 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2298 void *srcs, u32 nsrcs, size_t addr_size,
2299 int grec_type)
e6231bca
NA		 2300{
2301 struct net_bridge_group_src *ent;
2302 struct br_ip src_ip;
2303 u32 src_idx;
2304
2305 hlist_for_each_entry(ent, &pg->src_list, node)
2306 ent->flags |= BR_SGRP_F_DELETE;
2307
2308 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2309 src_ip.proto = pg->key.addr.proto;
e6231bca 2310 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2311 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
e6231bca
NA		 2312 ent = br_multicast_find_group_src(pg, &src_ip);
2313 if (ent)
2314 ent->flags &= ~BR_SGRP_F_DELETE;
2315 else
b0812368
NA		 2316 ent = br_multicast_new_group_src(pg, &src_ip);
2317 if (ent)
2318 br_multicast_fwd_src_handle(ent);
e6231bca
NA		 2319 }
2320
adc47037
NA		 2321 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2322 grec_type);
ddc255d9 2323
e6231bca
NA		 2324 __grp_src_delete_marked(pg);
2325}
2326
2327/* State Msg type New state Actions
2328 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
2329 * Delete (X-A)
2330 * Delete (Y-A)
2331 * Group Timer=GMI
2332 */
adc47037
NA		 2333static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx,
2334 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2335 void *srcs, u32 nsrcs, size_t addr_size,
2336 int grec_type)
e6231bca 2337{
e6231bca
NA		 2338 struct net_bridge_group_src *ent;
2339 unsigned long now = jiffies;
2340 bool changed = false;
2341 struct br_ip src_ip;
2342 u32 src_idx;
2343
2344 hlist_for_each_entry(ent, &pg->src_list, node)
2345 ent->flags |= BR_SGRP_F_DELETE;
2346
2347 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2348 src_ip.proto = pg->key.addr.proto;
e6231bca 2349 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2350 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
e6231bca
NA		 2351 ent = br_multicast_find_group_src(pg, &src_ip);
2352 if (ent) {
2353 ent->flags &= ~BR_SGRP_F_DELETE;
2354 } else {
2355 ent = br_multicast_new_group_src(pg, &src_ip);
2356 if (ent) {
b0812368 2357 __grp_src_mod_timer(ent,
adc47037 2358 now + br_multicast_gmi(brmctx));
e6231bca
NA		 2359 changed = true;
2360 }
2361 }
e6231bca
NA		 2362 }
2363
adc47037
NA		 2364 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2365 grec_type))
ddc255d9
NA		 2366 changed = true;
2367
e6231bca
NA		 2368 if (__grp_src_delete_marked(pg))
2369 changed = true;
2370
2371 return changed;
2372}
2373
adc47037
NA		 2374static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx,
2375 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2376 void *srcs, u32 nsrcs, size_t addr_size,
2377 int grec_type)
e6231bca 2378{
e6231bca
NA		 2379 bool changed = false;
2380
2381 switch (pg->filter_mode) {
2382 case MCAST_INCLUDE:
adc47037 2383 __grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
ddc255d9 2384 grec_type);
8266a049 2385 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
e6231bca
NA		 2386 changed = true;
2387 break;
2388 case MCAST_EXCLUDE:
adc47037
NA		 2389 changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs,
2390 addr_size, grec_type);
e6231bca
NA		 2391 break;
2392 }
2393
2394 pg->filter_mode = MCAST_EXCLUDE;
adc47037 2395 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
e6231bca
NA		 2396
2397 return changed;
2398}
2399
5bf1e00b
NA		 2400/* State Msg type New state Actions
2401 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
2402 * Send Q(G,A-B)
2403 */
adc47037
NA		 2404static bool __grp_src_toin_incl(struct net_bridge_mcast *brmctx,
2405 struct net_bridge_mcast_port *pmctx,
2406 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2407 void *srcs, u32 nsrcs, size_t addr_size,
2408 int grec_type)
5bf1e00b 2409{
5bf1e00b
NA		 2410 u32 src_idx, to_send = pg->src_ents;
2411 struct net_bridge_group_src *ent;
2412 unsigned long now = jiffies;
2413 bool changed = false;
2414 struct br_ip src_ip;
2415
2416 hlist_for_each_entry(ent, &pg->src_list, node)
2417 ent->flags |= BR_SGRP_F_SEND;
2418
2419 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2420 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2421 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2422 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2423 ent = br_multicast_find_group_src(pg, &src_ip);
2424 if (ent) {
2425 ent->flags &= ~BR_SGRP_F_SEND;
2426 to_send--;
2427 } else {
2428 ent = br_multicast_new_group_src(pg, &src_ip);
2429 if (ent)
2430 changed = true;
2431 }
2432 if (ent)
adc47037 2433 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2434 }
2435
adc47037
NA		 2436 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2437 grec_type))
ddc255d9
NA		 2438 changed = true;
2439
5bf1e00b 2440 if (to_send)
adc47037 2441 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2442
2443 return changed;
2444}
2445
2446/* State Msg type New state Actions
2447 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
2448 * Send Q(G,X-A)
2449 * Send Q(G)
2450 */
adc47037
NA		 2451static bool __grp_src_toin_excl(struct net_bridge_mcast *brmctx,
2452 struct net_bridge_mcast_port *pmctx,
2453 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2454 void *srcs, u32 nsrcs, size_t addr_size,
2455 int grec_type)
5bf1e00b 2456{
5bf1e00b
NA		 2457 u32 src_idx, to_send = pg->src_ents;
2458 struct net_bridge_group_src *ent;
2459 unsigned long now = jiffies;
2460 bool changed = false;
2461 struct br_ip src_ip;
2462
2463 hlist_for_each_entry(ent, &pg->src_list, node)
2464 if (timer_pending(&ent->timer))
2465 ent->flags |= BR_SGRP_F_SEND;
2466
2467 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2468 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2469 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2470 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2471 ent = br_multicast_find_group_src(pg, &src_ip);
2472 if (ent) {
2473 if (timer_pending(&ent->timer)) {
2474 ent->flags &= ~BR_SGRP_F_SEND;
2475 to_send--;
2476 }
2477 } else {
2478 ent = br_multicast_new_group_src(pg, &src_ip);
2479 if (ent)
2480 changed = true;
2481 }
2482 if (ent)
adc47037 2483 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2484 }
2485
adc47037
NA		 2486 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2487 grec_type))
ddc255d9
NA		 2488 changed = true;
2489
5bf1e00b 2490 if (to_send)
adc47037 2491 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b 2492
adc47037 2493 __grp_send_query_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2494
2495 return changed;
2496}
2497
adc47037
NA		 2498static bool br_multicast_toin(struct net_bridge_mcast *brmctx,
2499 struct net_bridge_mcast_port *pmctx,
2500 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2501 void *srcs, u32 nsrcs, size_t addr_size,
2502 int grec_type)
5bf1e00b
NA		 2503{
2504 bool changed = false;
2505
2506 switch (pg->filter_mode) {
2507 case MCAST_INCLUDE:
adc47037
NA		 2508 changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs,
2509 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2510 break;
2511 case MCAST_EXCLUDE:
adc47037
NA		 2512 changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs,
2513 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2514 break;
2515 }
2516
ddc255d9 2517 if (br_multicast_eht_should_del_pg(pg)) {
d5a10222 2518 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
ddc255d9
NA		 2519 br_multicast_find_del_pg(pg->key.port->br, pg);
2520 /* a notification has already been sent and we shouldn't
2521 * access pg after the delete so we have to return false
2522 */
2523 changed = false;
2524 }
2525
5bf1e00b
NA		 2526 return changed;
2527}
2528
2529/* State Msg type New state Actions
2530 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2531 * Delete (A-B)
2532 * Send Q(G,A*B)
2533 * Group Timer=GMI
2534 */
adc47037
NA		 2535static void __grp_src_toex_incl(struct net_bridge_mcast *brmctx,
2536 struct net_bridge_mcast_port *pmctx,
2537 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2538 void *srcs, u32 nsrcs, size_t addr_size,
2539 int grec_type)
5bf1e00b
NA		 2540{
2541 struct net_bridge_group_src *ent;
2542 u32 src_idx, to_send = 0;
2543 struct br_ip src_ip;
2544
2545 hlist_for_each_entry(ent, &pg->src_list, node)
2546 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2547
2548 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2549 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2550 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2551 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2552 ent = br_multicast_find_group_src(pg, &src_ip);
2553 if (ent) {
2554 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2555 BR_SGRP_F_SEND;
2556 to_send++;
2557 } else {
b0812368 2558 ent = br_multicast_new_group_src(pg, &src_ip);
5bf1e00b 2559 }
b0812368
NA		 2560 if (ent)
2561 br_multicast_fwd_src_handle(ent);
5bf1e00b
NA		 2562 }
2563
adc47037
NA		 2564 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2565 grec_type);
ddc255d9 2566
5bf1e00b
NA		 2567 __grp_src_delete_marked(pg);
2568 if (to_send)
adc47037 2569 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2570}
2571
2572/* State Msg type New state Actions
2573 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2574 * Delete (X-A)
2575 * Delete (Y-A)
2576 * Send Q(G,A-Y)
2577 * Group Timer=GMI
2578 */
adc47037
NA		 2579static bool __grp_src_toex_excl(struct net_bridge_mcast *brmctx,
2580 struct net_bridge_mcast_port *pmctx,
2581 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2582 void *srcs, u32 nsrcs, size_t addr_size,
2583 int grec_type)
5bf1e00b
NA		 2584{
2585 struct net_bridge_group_src *ent;
2586 u32 src_idx, to_send = 0;
2587 bool changed = false;
2588 struct br_ip src_ip;
2589
2590 hlist_for_each_entry(ent, &pg->src_list, node)
2591 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2592
2593 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2594 src_ip.proto = pg->key.addr.proto;
5bf1e00b 2595 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2596 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
5bf1e00b
NA		 2597 ent = br_multicast_find_group_src(pg, &src_ip);
2598 if (ent) {
2599 ent->flags &= ~BR_SGRP_F_DELETE;
2600 } else {
2601 ent = br_multicast_new_group_src(pg, &src_ip);
2602 if (ent) {
b0812368 2603 __grp_src_mod_timer(ent, pg->timer.expires);
5bf1e00b
NA		 2604 changed = true;
2605 }
2606 }
2607 if (ent && timer_pending(&ent->timer)) {
2608 ent->flags |= BR_SGRP_F_SEND;
2609 to_send++;
2610 }
5bf1e00b
NA		 2611 }
2612
adc47037
NA		 2613 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2614 grec_type))
ddc255d9
NA		 2615 changed = true;
2616
5bf1e00b
NA		 2617 if (__grp_src_delete_marked(pg))
2618 changed = true;
2619 if (to_send)
adc47037 2620 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
5bf1e00b
NA		 2621
2622 return changed;
2623}
2624
adc47037
NA		 2625static bool br_multicast_toex(struct net_bridge_mcast *brmctx,
2626 struct net_bridge_mcast_port *pmctx,
2627 struct net_bridge_port_group *pg, void *h_addr,
ddc255d9
NA		 2628 void *srcs, u32 nsrcs, size_t addr_size,
2629 int grec_type)
5bf1e00b 2630{
5bf1e00b
NA		 2631 bool changed = false;
2632
2633 switch (pg->filter_mode) {
2634 case MCAST_INCLUDE:
adc47037
NA		 2635 __grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs,
2636 addr_size, grec_type);
8266a049 2637 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
5bf1e00b
NA		 2638 changed = true;
2639 break;
2640 case MCAST_EXCLUDE:
adc47037
NA		 2641 changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs,
2642 nsrcs, addr_size, grec_type);
5bf1e00b
NA		 2643 break;
2644 }
2645
2646 pg->filter_mode = MCAST_EXCLUDE;
adc47037 2647 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
5bf1e00b
NA		 2648
2649 return changed;
2650}
2651
109865fe
NA		 2652/* State Msg type New state Actions
2653 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2654 */
adc47037
NA		 2655static bool __grp_src_block_incl(struct net_bridge_mcast *brmctx,
2656 struct net_bridge_mcast_port *pmctx,
2657 struct net_bridge_port_group *pg, void *h_addr,
474ddb37 2658 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2659{
2660 struct net_bridge_group_src *ent;
2661 u32 src_idx, to_send = 0;
0ad57c99 2662 bool changed = false;
109865fe
NA		 2663 struct br_ip src_ip;
2664
2665 hlist_for_each_entry(ent, &pg->src_list, node)
2666 ent->flags &= ~BR_SGRP_F_SEND;
2667
2668 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2669 src_ip.proto = pg->key.addr.proto;
109865fe 2670 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2671 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
109865fe
NA		 2672 ent = br_multicast_find_group_src(pg, &src_ip);
2673 if (ent) {
2674 ent->flags |= BR_SGRP_F_SEND;
2675 to_send++;
2676 }
109865fe
NA		 2677 }
2678
adc47037
NA		 2679 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2680 grec_type))
474ddb37
NA		 2681 changed = true;
2682
109865fe 2683 if (to_send)
adc47037 2684 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
109865fe 2685
0ad57c99 2686 return changed;
109865fe
NA		 2687}
2688
2689/* State Msg type New state Actions
2690 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2691 * Send Q(G,A-Y)
2692 */
adc47037
NA		 2693static bool __grp_src_block_excl(struct net_bridge_mcast *brmctx,
2694 struct net_bridge_mcast_port *pmctx,
2695 struct net_bridge_port_group *pg, void *h_addr,
474ddb37 2696 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2697{
2698 struct net_bridge_group_src *ent;
2699 u32 src_idx, to_send = 0;
2700 bool changed = false;
2701 struct br_ip src_ip;
2702
2703 hlist_for_each_entry(ent, &pg->src_list, node)
2704 ent->flags &= ~BR_SGRP_F_SEND;
2705
2706 memset(&src_ip, 0, sizeof(src_ip));
085b53c8 2707 src_ip.proto = pg->key.addr.proto;
109865fe 2708 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
e7cfcf2c 2709 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
109865fe
NA		 2710 ent = br_multicast_find_group_src(pg, &src_ip);
2711 if (!ent) {
2712 ent = br_multicast_new_group_src(pg, &src_ip);
2713 if (ent) {
b0812368 2714 __grp_src_mod_timer(ent, pg->timer.expires);
109865fe
NA		 2715 changed = true;
2716 }
2717 }
2718 if (ent && timer_pending(&ent->timer)) {
2719 ent->flags |= BR_SGRP_F_SEND;
2720 to_send++;
2721 }
109865fe
NA		 2722 }
2723
adc47037
NA		 2724 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2725 grec_type))
474ddb37
NA		 2726 changed = true;
2727
109865fe 2728 if (to_send)
adc47037 2729 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
109865fe
NA		 2730
2731 return changed;
2732}
2733
adc47037
NA		 2734static bool br_multicast_block(struct net_bridge_mcast *brmctx,
2735 struct net_bridge_mcast_port *pmctx,
2736 struct net_bridge_port_group *pg, void *h_addr,
474ddb37 2737 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
109865fe
NA		 2738{
2739 bool changed = false;
2740
2741 switch (pg->filter_mode) {
2742 case MCAST_INCLUDE:
adc47037
NA		 2743 changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs,
2744 nsrcs, addr_size, grec_type);
109865fe
NA		 2745 break;
2746 case MCAST_EXCLUDE:
adc47037
NA		 2747 changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs,
2748 nsrcs, addr_size, grec_type);
109865fe
NA		 2749 break;
2750 }
2751
e87e4b5c
NA		 2752 if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
2753 br_multicast_eht_should_del_pg(pg)) {
d5a10222
NA		 2754 if (br_multicast_eht_should_del_pg(pg))
2755 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
e87e4b5c
NA		 2756 br_multicast_find_del_pg(pg->key.port->br, pg);
2757 /* a notification has already been sent and we shouldn't
2758 * access pg after the delete so we have to return false
2759 */
2760 changed = false;
2761 }
2762
109865fe
NA		 2763 return changed;
2764}
2765
0436862e
NA		 2766static struct net_bridge_port_group *
2767br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2768 struct net_bridge_port *p,
2769 const unsigned char *src)
2770{
071445c6 2771 struct net_bridge *br __maybe_unused = mp->br;
0436862e 2772 struct net_bridge_port_group *pg;
0436862e
NA		 2773
2774 for (pg = mlock_dereference(mp->ports, br);
2775 pg;
2776 pg = mlock_dereference(pg->next, br))
2777 if (br_port_group_equal(pg, p, src))
2778 return pg;
2779
2780 return NULL;
2781}
2782
adc47037
NA		 2783static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx,
2784 struct net_bridge_mcast_port *pmctx,
06499098
VY		 2785 struct sk_buff *skb,
2786 u16 vid)
eb1d1641 2787{
adc47037 2788 bool igmpv2 = brmctx->multicast_igmp_version == 2;
0436862e
NA		 2789 struct net_bridge_mdb_entry *mdst;
2790 struct net_bridge_port_group *pg;
6db6f0ea 2791 const unsigned char *src;
eb1d1641
HX		 2792 struct igmpv3_report *ih;
2793 struct igmpv3_grec *grec;
0436862e 2794 int i, len, num, type;
54bea721 2795 __be32 group, *h_addr;
0436862e 2796 bool changed = false;
0436862e 2797 int err = 0;
e57f6185 2798 u16 nsrcs;
eb1d1641 2799
eb1d1641
HX		 2800 ih = igmpv3_report_hdr(skb);
2801 num = ntohs(ih->ngrec);
c2d4fbd2 2802 len = skb_transport_offset(skb) + sizeof(*ih);
eb1d1641
HX		 2803
2804 for (i = 0; i < num; i++) {
2805 len += sizeof(*grec);
ba5ea614 2806 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2807 return -EINVAL;
2808
fd218cf9 2809 grec = (void *)(skb->data + len - sizeof(*grec));
eb1d1641
HX		 2810 group = grec->grec_mca;
2811 type = grec->grec_type;
e57f6185 2812 nsrcs = ntohs(grec->grec_nsrcs);
eb1d1641 2813
e57f6185 2814 len += nsrcs * 4;
ba5ea614 2815 if (!ip_mc_may_pull(skb, len))
eb1d1641
HX		 2816 return -EINVAL;
2817
eb1d1641
HX		 2818 switch (type) {
2819 case IGMPV3_MODE_IS_INCLUDE:
2820 case IGMPV3_MODE_IS_EXCLUDE:
2821 case IGMPV3_CHANGE_TO_INCLUDE:
2822 case IGMPV3_CHANGE_TO_EXCLUDE:
2823 case IGMPV3_ALLOW_NEW_SOURCES:
2824 case IGMPV3_BLOCK_OLD_SOURCES:
2825 break;
2826
2827 default:
2828 continue;
2829 }
2830
6db6f0ea 2831 src = eth_hdr(skb)->h_source;
0436862e
NA		 2832 if (nsrcs == 0 &&
2833 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2834 type == IGMPV3_MODE_IS_INCLUDE)) {
adc47037
NA		 2835 if (!pmctx || igmpv2) {
2836 br_ip4_multicast_leave_group(brmctx, pmctx,
2837 group, vid, src);
0436862e
NA		 2838 continue;
2839 }
bc8c20ac 2840 } else {
adc47037
NA		 2841 err = br_ip4_multicast_add_group(brmctx, pmctx, group,
2842 vid, src, igmpv2);
bc8c20ac
SA		 2843 if (err)
2844 break;
2845 }
0436862e 2846
adc47037 2847 if (!pmctx || igmpv2)
0436862e
NA		 2848 continue;
2849
262985fa 2850 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10
NA		 2851 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2852 goto unlock_continue;
2853
adc47037 2854 mdst = br_mdb_ip4_get(brmctx->br, group, vid);
0436862e
NA		 2855 if (!mdst)
2856 goto unlock_continue;
adc47037 2857 pg = br_multicast_find_port(mdst, pmctx->port, src);
0436862e
NA		 2858 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2859 goto unlock_continue;
54bea721 2860 /* reload grec and host addr */
0436862e 2861 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
54bea721 2862 h_addr = &ip_hdr(skb)->saddr;
0436862e
NA		 2863 switch (type) {
2864 case IGMPV3_ALLOW_NEW_SOURCES:
adc47037
NA		 2865 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2866 grec->grec_src,
474ddb37 2867 nsrcs, sizeof(__be32), type);
0436862e 2868 break;
e6231bca 2869 case IGMPV3_MODE_IS_INCLUDE:
adc47037
NA		 2870 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2871 grec->grec_src,
474ddb37 2872 nsrcs, sizeof(__be32), type);
e6231bca
NA		 2873 break;
2874 case IGMPV3_MODE_IS_EXCLUDE:
adc47037
NA		 2875 changed = br_multicast_isexc(brmctx, pg, h_addr,
2876 grec->grec_src,
ddc255d9 2877 nsrcs, sizeof(__be32), type);
e6231bca 2878 break;
5bf1e00b 2879 case IGMPV3_CHANGE_TO_INCLUDE:
adc47037
NA		 2880 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
2881 grec->grec_src,
ddc255d9 2882 nsrcs, sizeof(__be32), type);
5bf1e00b
NA		 2883 break;
2884 case IGMPV3_CHANGE_TO_EXCLUDE:
adc47037
NA		 2885 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
2886 grec->grec_src,
ddc255d9 2887 nsrcs, sizeof(__be32), type);
5bf1e00b 2888 break;
109865fe 2889 case IGMPV3_BLOCK_OLD_SOURCES:
adc47037
NA		 2890 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
2891 grec->grec_src,
474ddb37 2892 nsrcs, sizeof(__be32), type);
109865fe 2893 break;
0436862e
NA		 2894 }
2895 if (changed)
adc47037 2896 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
0436862e 2897unlock_continue:
262985fa 2898 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 2899 }
2900
2901 return err;
2902}
2903
dfd56b8b 2904#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 2905static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx,
2906 struct net_bridge_mcast_port *pmctx,
06499098
VY		 2907 struct sk_buff *skb,
2908 u16 vid)
08b202b6 2909{
adc47037 2910 bool mldv1 = brmctx->multicast_mld_version == 1;
0436862e
NA		 2911 struct net_bridge_mdb_entry *mdst;
2912 struct net_bridge_port_group *pg;
ba5ea614 2913 unsigned int nsrcs_offset;
6baeb395 2914 struct mld2_report *mld2r;
6db6f0ea 2915 const unsigned char *src;
54bea721 2916 struct in6_addr *h_addr;
08b202b6 2917 struct mld2_grec *grec;
ba5ea614 2918 unsigned int grec_len;
0436862e
NA		 2919 bool changed = false;
2920 int i, len, num;
08b202b6
YH		 2921 int err = 0;
2922
6baeb395 2923 if (!ipv6_mc_may_pull(skb, sizeof(*mld2r)))
08b202b6
YH		 2924 return -EINVAL;
2925
6baeb395
M		 2926 mld2r = (struct mld2_report *)icmp6_hdr(skb);
2927 num = ntohs(mld2r->mld2r_ngrec);
2928 len = skb_transport_offset(skb) + sizeof(*mld2r);
08b202b6
YH		 2929
2930 for (i = 0; i < num; i++) {
e57f6185
NA		 2931 __be16 *_nsrcs, __nsrcs;
2932 u16 nsrcs;
08b202b6 2933
ba5ea614
LL		 2934 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2935
2936 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
5fc6266a 2937 nsrcs_offset + sizeof(__nsrcs))
ba5ea614
LL		 2938 return -EINVAL;
2939
e57f6185
NA		 2940 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2941 sizeof(__nsrcs), &__nsrcs);
2942 if (!_nsrcs)
08b202b6
YH		 2943 return -EINVAL;
2944
e57f6185
NA		 2945 nsrcs = ntohs(*_nsrcs);
2946 grec_len = struct_size(grec, grec_src, nsrcs);
ba5ea614
LL		 2947
2948 if (!ipv6_mc_may_pull(skb, len + grec_len))
08b202b6
YH		 2949 return -EINVAL;
2950
2951 grec = (struct mld2_grec *)(skb->data + len);
ba5ea614 2952 len += grec_len;
08b202b6 2953
08b202b6
YH		 2954 switch (grec->grec_type) {
2955 case MLD2_MODE_IS_INCLUDE:
2956 case MLD2_MODE_IS_EXCLUDE:
2957 case MLD2_CHANGE_TO_INCLUDE:
2958 case MLD2_CHANGE_TO_EXCLUDE:
2959 case MLD2_ALLOW_NEW_SOURCES:
2960 case MLD2_BLOCK_OLD_SOURCES:
2961 break;
2962
2963 default:
2964 continue;
2965 }
2966
6db6f0ea 2967 src = eth_hdr(skb)->h_source;
bc8c20ac
SA		 2968 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2969 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
e57f6185 2970 nsrcs == 0) {
adc47037
NA		 2971 if (!pmctx || mldv1) {
2972 br_ip6_multicast_leave_group(brmctx, pmctx,
0436862e
NA		 2973 &grec->grec_mca,
2974 vid, src);
2975 continue;
2976 }
bc8c20ac 2977 } else {
adc47037 2978 err = br_ip6_multicast_add_group(brmctx, pmctx,
6db6f0ea 2979 &grec->grec_mca, vid,
0436862e 2980 src, mldv1);
9264251e 2981 if (err)
bc8c20ac
SA		 2982 break;
2983 }
0436862e 2984
adc47037 2985 if (!pmctx || mldv1)
0436862e
NA		 2986 continue;
2987
262985fa 2988 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10
NA		 2989 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2990 goto unlock_continue;
2991
adc47037 2992 mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid);
0436862e
NA		 2993 if (!mdst)
2994 goto unlock_continue;
adc47037 2995 pg = br_multicast_find_port(mdst, pmctx->port, src);
0436862e
NA		 2996 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2997 goto unlock_continue;
54bea721 2998 h_addr = &ipv6_hdr(skb)->saddr;
0436862e
NA		 2999 switch (grec->grec_type) {
3000 case MLD2_ALLOW_NEW_SOURCES:
adc47037 3001 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
54bea721 3002 grec->grec_src, nsrcs,
474ddb37
NA		 3003 sizeof(struct in6_addr),
3004 grec->grec_type);
0436862e 3005 break;
e6231bca 3006 case MLD2_MODE_IS_INCLUDE:
adc47037 3007 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
54bea721 3008 grec->grec_src, nsrcs,
474ddb37
NA		 3009 sizeof(struct in6_addr),
3010 grec->grec_type);
e6231bca
NA		 3011 break;
3012 case MLD2_MODE_IS_EXCLUDE:
adc47037 3013 changed = br_multicast_isexc(brmctx, pg, h_addr,
54bea721 3014 grec->grec_src, nsrcs,
ddc255d9
NA		 3015 sizeof(struct in6_addr),
3016 grec->grec_type);
e6231bca 3017 break;
5bf1e00b 3018 case MLD2_CHANGE_TO_INCLUDE:
adc47037 3019 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
54bea721 3020 grec->grec_src, nsrcs,
ddc255d9
NA		 3021 sizeof(struct in6_addr),
3022 grec->grec_type);
5bf1e00b
NA		 3023 break;
3024 case MLD2_CHANGE_TO_EXCLUDE:
adc47037 3025 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
54bea721 3026 grec->grec_src, nsrcs,
ddc255d9
NA		 3027 sizeof(struct in6_addr),
3028 grec->grec_type);
5bf1e00b 3029 break;
109865fe 3030 case MLD2_BLOCK_OLD_SOURCES:
adc47037 3031 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
54bea721 3032 grec->grec_src, nsrcs,
474ddb37
NA		 3033 sizeof(struct in6_addr),
3034 grec->grec_type);
109865fe 3035 break;
0436862e
NA		 3036 }
3037 if (changed)
adc47037 3038 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
0436862e 3039unlock_continue:
262985fa 3040 spin_unlock(&brmctx->br->multicast_lock);
08b202b6
YH		 3041 }
3042
3043 return err;
3044}
3045#endif
3046
c3fb3698
NA		 3047static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx,
3048 struct net_bridge_mcast_port *pmctx,
3049 struct br_ip *saddr)
dc4eb53a 3050{
67b746f9 3051 int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0;
c3fb3698
NA		 3052 struct timer_list *own_timer, *other_timer;
3053 struct bridge_mcast_querier *querier;
54cb4319 3054
c3fb3698
NA		 3055 switch (saddr->proto) {
3056 case htons(ETH_P_IP):
3057 querier = &brmctx->ip4_querier;
3058 own_timer = &brmctx->ip4_own_query.timer;
3059 other_timer = &brmctx->ip4_other_query.timer;
3060 if (!querier->addr.src.ip4 ||
3061 ntohl(saddr->src.ip4) <= ntohl(querier->addr.src.ip4))
3062 goto update;
3063 break;
dc4eb53a 3064#if IS_ENABLED(CONFIG_IPV6)
c3fb3698
NA		 3065 case htons(ETH_P_IPV6):
3066 querier = &brmctx->ip6_querier;
3067 own_timer = &brmctx->ip6_own_query.timer;
3068 other_timer = &brmctx->ip6_other_query.timer;
3069 if (ipv6_addr_cmp(&saddr->src.ip6, &querier->addr.src.ip6) <= 0)
3070 goto update;
3071 break;
3072#endif
3073 default:
3074 return false;
3075 }
dc4eb53a 3076
c3fb3698 3077 if (!timer_pending(own_timer) && !timer_pending(other_timer))
dc4eb53a
LL		 3078 goto update;
3079
3080 return false;
3081
3082update:
c3fb3698 3083 br_multicast_update_querier(brmctx, querier, port_ifidx, saddr);
2cd41431 3084
dc4eb53a
LL		 3085 return true;
3086}
dc4eb53a 3087
c7fa1d9b
NA		 3088static struct net_bridge_port *
3089__br_multicast_get_querier_port(struct net_bridge *br,
3090 const struct bridge_mcast_querier *querier)
3091{
3092 int port_ifidx = READ_ONCE(querier->port_ifidx);
3093 struct net_bridge_port *p;
3094 struct net_device *dev;
3095
3096 if (port_ifidx == 0)
3097 return NULL;
3098
3099 dev = dev_get_by_index_rcu(dev_net(br->dev), port_ifidx);
3100 if (!dev)
3101 return NULL;
3102 p = br_port_get_rtnl_rcu(dev);
3103 if (!p || p->br != br)
3104 return NULL;
3105
3106 return p;
3107}
3108
3109size_t br_multicast_querier_state_size(void)
3110{
cdda378b 3111 return nla_total_size(0) + /* nest attribute */
c7fa1d9b
NA		 3112 nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */
3113 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IP_PORT */
175e6692
NA		 3114 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IP_OTHER_TIMER */
3115#if IS_ENABLED(CONFIG_IPV6)
3116 nla_total_size(sizeof(struct in6_addr)) + /* BRIDGE_QUERIER_IPV6_ADDRESS */
3117 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IPV6_PORT */
3118 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IPV6_OTHER_TIMER */
3119#endif
3120 0;
c7fa1d9b
NA		 3121}
3122
3123/* protected by rtnl or rcu */
3124int br_multicast_dump_querier_state(struct sk_buff *skb,
3125 const struct net_bridge_mcast *brmctx,
3126 int nest_attr)
3127{
3128 struct bridge_mcast_querier querier = {};
3129 struct net_bridge_port *p;
3130 struct nlattr *nest;
3131
f137b7d4
NA		 3132 if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
3133 br_multicast_ctx_vlan_global_disabled(brmctx))
3134 return 0;
3135
c7fa1d9b
NA		 3136 nest = nla_nest_start(skb, nest_attr);
3137 if (!nest)
3138 return -EMSGSIZE;
3139
3140 rcu_read_lock();
85b41082
NA		 3141 if (!brmctx->multicast_querier &&
3142 !timer_pending(&brmctx->ip4_other_query.timer))
3143 goto out_v6;
3144
c7fa1d9b
NA		 3145 br_multicast_read_querier(&brmctx->ip4_querier, &querier);
3146 if (nla_put_in_addr(skb, BRIDGE_QUERIER_IP_ADDRESS,
3147 querier.addr.src.ip4)) {
3148 rcu_read_unlock();
3149 goto out_err;
3150 }
3151
3152 p = __br_multicast_get_querier_port(brmctx->br, &querier);
3153 if (timer_pending(&brmctx->ip4_other_query.timer) &&
3154 (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IP_OTHER_TIMER,
3155 br_timer_value(&brmctx->ip4_other_query.timer),
3156 BRIDGE_QUERIER_PAD) ||
3157 (p && nla_put_u32(skb, BRIDGE_QUERIER_IP_PORT, p->dev->ifindex)))) {
3158 rcu_read_unlock();
3159 goto out_err;
3160 }
85b41082
NA		 3161
3162out_v6:
3163#if IS_ENABLED(CONFIG_IPV6)
3164 if (!brmctx->multicast_querier &&
3165 !timer_pending(&brmctx->ip6_other_query.timer))
3166 goto out;
3167
3168 br_multicast_read_querier(&brmctx->ip6_querier, &querier);
3169 if (nla_put_in6_addr(skb, BRIDGE_QUERIER_IPV6_ADDRESS,
3170 &querier.addr.src.ip6)) {
3171 rcu_read_unlock();
3172 goto out_err;
3173 }
3174
3175 p = __br_multicast_get_querier_port(brmctx->br, &querier);
3176 if (timer_pending(&brmctx->ip6_other_query.timer) &&
3177 (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IPV6_OTHER_TIMER,
3178 br_timer_value(&brmctx->ip6_other_query.timer),
3179 BRIDGE_QUERIER_PAD) ||
3180 (p && nla_put_u32(skb, BRIDGE_QUERIER_IPV6_PORT,
3181 p->dev->ifindex)))) {
3182 rcu_read_unlock();
3183 goto out_err;
3184 }
3185out:
3186#endif
c7fa1d9b
NA		 3187 rcu_read_unlock();
3188 nla_nest_end(skb, nest);
85b41082
NA		 3189 if (!nla_len(nest))
3190 nla_nest_cancel(skb, nest);
c7fa1d9b
NA		 3191
3192 return 0;
3193
3194out_err:
3195 nla_nest_cancel(skb, nest);
3196 return -EMSGSIZE;
3197}
3198
cc0fdd80 3199static void
adc47037 3200br_multicast_update_query_timer(struct net_bridge_mcast *brmctx,
90010b36
LL		 3201 struct bridge_mcast_other_query *query,
3202 unsigned long max_delay)
b00589af 3203{
90010b36 3204 if (!timer_pending(&query->timer))
f5c3eb4b 3205 mod_timer(&query->delay_timer, jiffies + max_delay);
b00589af 3206
adc47037 3207 mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval);
b00589af
LL		 3208}
3209
6d549648
NF		 3210static void br_port_mc_router_state_change(struct net_bridge_port *p,
3211 bool is_mc_router)
3212{
3213 struct switchdev_attr attr = {
3214 .orig_dev = p->dev,
3215 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
3216 .flags = SWITCHDEV_F_DEFER,
3217 .u.mrouter = is_mc_router,
3218 };
3219
dcbdf135 3220 switchdev_port_attr_set(p->dev, &attr, NULL);
6d549648
NF		 3221}
3222
d9b8c4d8 3223static struct net_bridge_port *
d3d065c0 3224br_multicast_rport_from_node(struct net_bridge_mcast *brmctx,
d9b8c4d8
LL		 3225 struct hlist_head *mc_router_list,
3226 struct hlist_node *rlist)
3227{
9632233e
NA		 3228 struct net_bridge_mcast_port *pmctx;
3229
a3c02e76 3230#if IS_ENABLED(CONFIG_IPV6)
d3d065c0 3231 if (mc_router_list == &brmctx->ip6_mc_router_list)
9632233e
NA		 3232 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3233 ip6_rlist);
3234 else
a3c02e76 3235#endif
9632233e
NA		 3236 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3237 ip4_rlist);
3238
3239 return pmctx->port;
d9b8c4d8
LL		 3240}
3241
3242static struct hlist_node *
d3d065c0 3243br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx,
d9b8c4d8
LL		 3244 struct net_bridge_port *port,
3245 struct hlist_head *mc_router_list)
3246
3247{
3248 struct hlist_node *slot = NULL;
3249 struct net_bridge_port *p;
3250 struct hlist_node *rlist;
3251
3252 hlist_for_each(rlist, mc_router_list) {
d3d065c0 3253 p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist);
d9b8c4d8
LL		 3254
3255 if ((unsigned long)port >= (unsigned long)p)
3256 break;
3257
3258 slot = rlist;
3259 }
3260
3261 return slot;
3262}
3263
adc47037 3264static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx,
a3c02e76
LL		 3265 struct hlist_node *rnode)
3266{
3267#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3268 if (rnode != &pmctx->ip6_rlist)
3269 return hlist_unhashed(&pmctx->ip6_rlist);
a3c02e76 3270 else
adc47037 3271 return hlist_unhashed(&pmctx->ip4_rlist);
a3c02e76
LL		 3272#else
3273 return true;
3274#endif
3275}
3276
d9b8c4d8 3277/* Add port to router_list
7e80c124 3278 * list is maintained ordered by pointer value
3279 * and locked by br->multicast_lock and RCU
3280 */
d3d065c0 3281static void br_multicast_add_router(struct net_bridge_mcast *brmctx,
adc47037 3282 struct net_bridge_mcast_port *pmctx,
d9b8c4d8
LL		 3283 struct hlist_node *rlist,
3284 struct hlist_head *mc_router_list)
0909e117 3285{
d9b8c4d8 3286 struct hlist_node *slot;
dcdca2c4 3287
d9b8c4d8 3288 if (!hlist_unhashed(rlist))
1a040eac
NA		 3289 return;
3290
adc47037 3291 slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list);
dcdca2c4 3292
7e80c124 3293 if (slot)
d9b8c4d8 3294 hlist_add_behind_rcu(rlist, slot);
dcdca2c4 3295 else
d9b8c4d8
LL		 3296 hlist_add_head_rcu(rlist, mc_router_list);
3297
a3c02e76
LL		 3298 /* For backwards compatibility for now, only notify if we
3299 * switched from no IPv4/IPv6 multicast router to a new
3300 * IPv4 or IPv6 multicast router.
3301 */
adc47037 3302 if (br_multicast_no_router_otherpf(pmctx, rlist)) {
1e9ca456 3303 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB);
adc47037 3304 br_port_mc_router_state_change(pmctx->port, true);
a3c02e76 3305 }
0909e117
HX		 3306}
3307
d9b8c4d8
LL		 3308/* Add port to router_list
3309 * list is maintained ordered by pointer value
3310 * and locked by br->multicast_lock and RCU
3311 */
adc47037
NA		 3312static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
3313 struct net_bridge_mcast_port *pmctx)
d9b8c4d8 3314{
adc47037
NA		 3315 br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist,
3316 &brmctx->ip4_mc_router_list);
d9b8c4d8
LL		 3317}
3318
a3c02e76
LL		 3319/* Add port to router_list
3320 * list is maintained ordered by pointer value
3321 * and locked by br->multicast_lock and RCU
3322 */
adc47037
NA		 3323static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
3324 struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 3325{
3326#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3327 br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist,
3328 &brmctx->ip6_mc_router_list);
a3c02e76
LL		 3329#endif
3330}
3331
adc47037
NA		 3332static void br_multicast_mark_router(struct net_bridge_mcast *brmctx,
3333 struct net_bridge_mcast_port *pmctx,
d9b8c4d8
LL		 3334 struct timer_list *timer,
3335 struct hlist_node *rlist,
3336 struct hlist_head *mc_router_list)
eb1d1641
HX		 3337{
3338 unsigned long now = jiffies;
eb1d1641 3339
4cdd0d10
NA		 3340 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3341 return;
3342
adc47037 3343 if (!pmctx) {
d3d065c0
NA		 3344 if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
3345 if (!br_ip4_multicast_is_router(brmctx) &&
3346 !br_ip6_multicast_is_router(brmctx))
adc47037 3347 br_mc_router_state_change(brmctx->br, true);
d3d065c0 3348 mod_timer(timer, now + brmctx->multicast_querier_interval);
77041420 3349 }
eb1d1641
HX		 3350 return;
3351 }
3352
adc47037
NA		 3353 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
3354 pmctx->multicast_router == MDB_RTR_TYPE_PERM)
eb1d1641
HX		 3355 return;
3356
adc47037 3357 br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list);
d3d065c0 3358 mod_timer(timer, now + brmctx->multicast_querier_interval);
d9b8c4d8
LL		 3359}
3360
adc47037
NA		 3361static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx,
3362 struct net_bridge_mcast_port *pmctx)
d9b8c4d8 3363{
adc47037 3364 struct timer_list *timer = &brmctx->ip4_mc_router_timer;
d9b8c4d8
LL		 3365 struct hlist_node *rlist = NULL;
3366
adc47037
NA		 3367 if (pmctx) {
3368 timer = &pmctx->ip4_mc_router_timer;
3369 rlist = &pmctx->ip4_rlist;
d9b8c4d8 3370 }
eb1d1641 3371
adc47037
NA		 3372 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3373 &brmctx->ip4_mc_router_list);
eb1d1641
HX		 3374}
3375
adc47037
NA		 3376static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx,
3377 struct net_bridge_mcast_port *pmctx)
a3c02e76
LL		 3378{
3379#if IS_ENABLED(CONFIG_IPV6)
adc47037 3380 struct timer_list *timer = &brmctx->ip6_mc_router_timer;
a3c02e76
LL		 3381 struct hlist_node *rlist = NULL;
3382
adc47037
NA		 3383 if (pmctx) {
3384 timer = &pmctx->ip6_mc_router_timer;
3385 rlist = &pmctx->ip6_rlist;
a3c02e76
LL		 3386 }
3387
adc47037
NA		 3388 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3389 &brmctx->ip6_mc_router_list);
a3c02e76
LL		 3390#endif
3391}
3392
b19232ef 3393static void
adc47037
NA		 3394br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx,
3395 struct net_bridge_mcast_port *pmctx,
b19232ef
LL		 3396 struct bridge_mcast_other_query *query,
3397 struct br_ip *saddr,
3398 unsigned long max_delay)
3399{
c3fb3698 3400 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
b19232ef
LL		 3401 return;
3402
adc47037
NA		 3403 br_multicast_update_query_timer(brmctx, query, max_delay);
3404 br_ip4_multicast_mark_router(brmctx, pmctx);
b19232ef
LL		 3405}
3406
3407#if IS_ENABLED(CONFIG_IPV6)
3408static void
adc47037
NA		 3409br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx,
3410 struct net_bridge_mcast_port *pmctx,
b19232ef
LL		 3411 struct bridge_mcast_other_query *query,
3412 struct br_ip *saddr,
3413 unsigned long max_delay)
eb1d1641 3414{
c3fb3698 3415 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
eb1d1641
HX		 3416 return;
3417
adc47037
NA		 3418 br_multicast_update_query_timer(brmctx, query, max_delay);
3419 br_ip6_multicast_mark_router(brmctx, pmctx);
eb1d1641 3420}
b19232ef 3421#endif
eb1d1641 3422
adc47037
NA		 3423static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx,
3424 struct net_bridge_mcast_port *pmctx,
9c2e955c 3425 struct sk_buff *skb,
3426 u16 vid)
eb1d1641 3427{
ba5ea614 3428 unsigned int transport_len = ip_transport_len(skb);
b71d1d42 3429 const struct iphdr *iph = ip_hdr(skb);
eb1d1641
HX		 3430 struct igmphdr *ih = igmp_hdr(skb);
3431 struct net_bridge_mdb_entry *mp;
3432 struct igmpv3_query *ih3;
3433 struct net_bridge_port_group *p;
e8051688 3434 struct net_bridge_port_group __rcu **pp;
67b746f9 3435 struct br_ip saddr = {};
eb1d1641
HX		 3436 unsigned long max_delay;
3437 unsigned long now = jiffies;
3438 __be32 group;
3439
adc47037 3440 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10 3441 if (!br_multicast_ctx_should_use(brmctx, pmctx))
eb1d1641
HX		 3442 goto out;
3443
eb1d1641
HX		 3444 group = ih->group;
3445
ba5ea614 3446 if (transport_len == sizeof(*ih)) {
eb1d1641
HX		 3447 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
3448
3449 if (!max_delay) {
3450 max_delay = 10 * HZ;
3451 group = 0;
3452 }
ba5ea614 3453 } else if (transport_len >= sizeof(*ih3)) {
eb1d1641 3454 ih3 = igmpv3_query_hdr(skb);
23550b83 3455 if (ih3->nsrcs ||
d3d065c0
NA		 3456 (brmctx->multicast_igmp_version == 3 && group &&
3457 ih3->suppress))
bec68ff1 3458 goto out;
eb1d1641 3459
0ba8c9ec
YH		 3460 max_delay = ih3->code ?
3461 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
9afd85c9 3462 } else {
9ed973cc
LL		 3463 goto out;
3464 }
3465
dc4eb53a
LL		 3466 if (!group) {
3467 saddr.proto = htons(ETH_P_IP);
deb96566 3468 saddr.src.ip4 = iph->saddr;
b00589af 3469
adc47037 3470 br_ip4_multicast_query_received(brmctx, pmctx,
d3d065c0 3471 &brmctx->ip4_other_query,
b19232ef 3472 &saddr, max_delay);
eb1d1641 3473 goto out;
dc4eb53a 3474 }
eb1d1641 3475
adc47037 3476 mp = br_mdb_ip4_get(brmctx->br, group, vid);
eb1d1641
HX		 3477 if (!mp)
3478 goto out;
3479
d3d065c0 3480 max_delay *= brmctx->multicast_last_member_count;
eb1d1641 3481
ff0fd34e 3482 if (mp->host_joined &&
eb1d1641
HX		 3483 (timer_pending(&mp->timer) ?
3484 time_after(mp->timer.expires, now + max_delay) :
3485 try_to_del_timer_sync(&mp->timer) >= 0))
3486 mod_timer(&mp->timer, now + max_delay);
3487
e8051688 3488 for (pp = &mp->ports;
adc47037 3489 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 3490 pp = &p->next) {
eb1d1641
HX		 3491 if (timer_pending(&p->timer) ?
3492 time_after(p->timer.expires, now + max_delay) :
23550b83 3493 try_to_del_timer_sync(&p->timer) >= 0 &&
d3d065c0 3494 (brmctx->multicast_igmp_version == 2 ||
23550b83 3495 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 3496 mod_timer(&p->timer, now + max_delay);
eb1d1641
HX		 3497 }
3498
3499out:
adc47037 3500 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 3501}
3502
dfd56b8b 3503#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3504static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx,
3505 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3506 struct sk_buff *skb,
3507 u16 vid)
08b202b6 3508{
ba5ea614 3509 unsigned int transport_len = ipv6_transport_len(skb);
eca2a43b 3510 struct mld_msg *mld;
08b202b6
YH		 3511 struct net_bridge_mdb_entry *mp;
3512 struct mld2_query *mld2q;
e8051688
ED		 3513 struct net_bridge_port_group *p;
3514 struct net_bridge_port_group __rcu **pp;
67b746f9 3515 struct br_ip saddr = {};
08b202b6
YH		 3516 unsigned long max_delay;
3517 unsigned long now = jiffies;
856ce5d0 3518 unsigned int offset = skb_transport_offset(skb);
b71d1d42 3519 const struct in6_addr *group = NULL;
9ed973cc 3520 bool is_general_query;
08b202b6
YH		 3521 int err = 0;
3522
adc47037 3523 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10 3524 if (!br_multicast_ctx_should_use(brmctx, pmctx))
08b202b6
YH		 3525 goto out;
3526
ba5ea614 3527 if (transport_len == sizeof(*mld)) {
856ce5d0 3528 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
08b202b6
YH		 3529 err = -EINVAL;
3530 goto out;
3531 }
3532 mld = (struct mld_msg *) icmp6_hdr(skb);
4715213d 3533 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
08b202b6
YH		 3534 if (max_delay)
3535 group = &mld->mld_mca;
248ba8ec 3536 } else {
856ce5d0 3537 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
08b202b6
YH		 3538 err = -EINVAL;
3539 goto out;
3540 }
3541 mld2q = (struct mld2_query *)icmp6_hdr(skb);
3542 if (!mld2q->mld2q_nsrcs)
3543 group = &mld2q->mld2q_mca;
d3d065c0 3544 if (brmctx->multicast_mld_version == 2 &&
23550b83
NA		 3545 !ipv6_addr_any(&mld2q->mld2q_mca) &&
3546 mld2q->mld2q_suppress)
3547 goto out;
e3f5b170
DB		 3548
3549 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
08b202b6
YH		 3550 }
3551
9ed973cc
LL		 3552 is_general_query = group && ipv6_addr_any(group);
3553
dc4eb53a
LL		 3554 if (is_general_query) {
3555 saddr.proto = htons(ETH_P_IPV6);
deb96566 3556 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
b00589af 3557
adc47037 3558 br_ip6_multicast_query_received(brmctx, pmctx,
d3d065c0 3559 &brmctx->ip6_other_query,
b19232ef 3560 &saddr, max_delay);
08b202b6 3561 goto out;
6c03ee8b
LL		 3562 } else if (!group) {
3563 goto out;
dc4eb53a 3564 }
08b202b6 3565
adc47037 3566 mp = br_mdb_ip6_get(brmctx->br, group, vid);
08b202b6
YH		 3567 if (!mp)
3568 goto out;
3569
d3d065c0 3570 max_delay *= brmctx->multicast_last_member_count;
ff0fd34e 3571 if (mp->host_joined &&
08b202b6
YH		 3572 (timer_pending(&mp->timer) ?
3573 time_after(mp->timer.expires, now + max_delay) :
3574 try_to_del_timer_sync(&mp->timer) >= 0))
3575 mod_timer(&mp->timer, now + max_delay);
3576
e8051688 3577 for (pp = &mp->ports;
adc47037 3578 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
e8051688 3579 pp = &p->next) {
08b202b6
YH		 3580 if (timer_pending(&p->timer) ?
3581 time_after(p->timer.expires, now + max_delay) :
23550b83 3582 try_to_del_timer_sync(&p->timer) >= 0 &&
d3d065c0 3583 (brmctx->multicast_mld_version == 1 ||
23550b83 3584 p->filter_mode == MCAST_EXCLUDE))
24f9cdcb 3585 mod_timer(&p->timer, now + max_delay);
08b202b6
YH		 3586 }
3587
3588out:
adc47037 3589 spin_unlock(&brmctx->br->multicast_lock);
08b202b6
YH		 3590 return err;
3591}
3592#endif
3593
90010b36 3594static void
adc47037
NA		 3595br_multicast_leave_group(struct net_bridge_mcast *brmctx,
3596 struct net_bridge_mcast_port *pmctx,
90010b36
LL		 3597 struct br_ip *group,
3598 struct bridge_mcast_other_query *other_query,
6db6f0ea
FF		 3599 struct bridge_mcast_own_query *own_query,
3600 const unsigned char *src)
eb1d1641 3601{
eb1d1641
HX		 3602 struct net_bridge_mdb_entry *mp;
3603 struct net_bridge_port_group *p;
3604 unsigned long now;
3605 unsigned long time;
3606
adc47037 3607 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10 3608 if (!br_multicast_ctx_should_use(brmctx, pmctx))
eb1d1641
HX		 3609 goto out;
3610
adc47037 3611 mp = br_mdb_ip_get(brmctx->br, group);
eb1d1641
HX		 3612 if (!mp)
3613 goto out;
3614
adc47037 3615 if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) {
544586f7
SA		 3616 struct net_bridge_port_group __rcu **pp;
3617
3618 for (pp = &mp->ports;
adc47037 3619 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
544586f7 3620 pp = &p->next) {
adc47037 3621 if (!br_port_group_equal(p, pmctx->port, src))
544586f7
SA		 3622 continue;
3623
5c725b6b
NA		 3624 if (p->flags & MDB_PG_FLAGS_PERMANENT)
3625 break;
3626
681590bd
NA		 3627 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
3628 br_multicast_del_pg(mp, p, pp);
544586f7
SA		 3629 }
3630 goto out;
3631 }
3632
3633 if (timer_pending(&other_query->timer))
3634 goto out;
3635
4d5b4e84 3636 if (brmctx->multicast_querier) {
adc47037 3637 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr,
42c11ccf 3638 false, 0, NULL);
6b7df111 3639
d3d065c0
NA		 3640 time = jiffies + brmctx->multicast_last_member_count *
3641 brmctx->multicast_last_member_interval;
cc0fdd80 3642
90010b36 3643 mod_timer(&own_query->timer, time);
6b7df111 3644
adc47037 3645 for (p = mlock_dereference(mp->ports, brmctx->br);
54cb4319 3646 p != NULL && pmctx != NULL;
adc47037
NA		 3647 p = mlock_dereference(p->next, brmctx->br)) {
3648 if (!br_port_group_equal(p, pmctx->port, src))
6b7df111
CW		 3649 continue;
3650
3651 if (!hlist_unhashed(&p->mglist) &&
3652 (timer_pending(&p->timer) ?
3653 time_after(p->timer.expires, time) :
3654 try_to_del_timer_sync(&p->timer) >= 0)) {
3655 mod_timer(&p->timer, time);
3656 }
3657
3658 break;
3659 }
3660 }
3661
eb1d1641 3662 now = jiffies;
d3d065c0
NA		 3663 time = now + brmctx->multicast_last_member_count *
3664 brmctx->multicast_last_member_interval;
eb1d1641 3665
adc47037 3666 if (!pmctx) {
ff0fd34e 3667 if (mp->host_joined &&
eb1d1641
HX		 3668 (timer_pending(&mp->timer) ?
3669 time_after(mp->timer.expires, time) :
3670 try_to_del_timer_sync(&mp->timer) >= 0)) {
3671 mod_timer(&mp->timer, time);
eb1d1641 3672 }
454594f3
LL		 3673
3674 goto out;
3675 }
3676
adc47037 3677 for (p = mlock_dereference(mp->ports, brmctx->br);
454594f3 3678 p != NULL;
adc47037
NA		 3679 p = mlock_dereference(p->next, brmctx->br)) {
3680 if (p->key.port != pmctx->port)
454594f3
LL		 3681 continue;
3682
3683 if (!hlist_unhashed(&p->mglist) &&
3684 (timer_pending(&p->timer) ?
3685 time_after(p->timer.expires, time) :
3686 try_to_del_timer_sync(&p->timer) >= 0)) {
3687 mod_timer(&p->timer, time);
3688 }
3689
3690 break;
eb1d1641 3691 }
eb1d1641 3692out:
adc47037 3693 spin_unlock(&brmctx->br->multicast_lock);
eb1d1641
HX		 3694}
3695
adc47037
NA		 3696static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
3697 struct net_bridge_mcast_port *pmctx,
b0e9a30d 3698 __be32 group,
6db6f0ea
FF		 3699 __u16 vid,
3700 const unsigned char *src)
8ef2a9a5
YH		 3701{
3702 struct br_ip br_group;
90010b36 3703 struct bridge_mcast_own_query *own_query;
8ef2a9a5
YH		 3704
3705 if (ipv4_is_local_multicast(group))
3706 return;
3707
adc47037 3708 own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query;
90010b36 3709
1515a63f 3710 memset(&br_group, 0, sizeof(br_group));
eab3227b 3711 br_group.dst.ip4 = group;
8ef2a9a5 3712 br_group.proto = htons(ETH_P_IP);
b0e9a30d 3713 br_group.vid = vid;
8ef2a9a5 3714
adc47037
NA		 3715 br_multicast_leave_group(brmctx, pmctx, &br_group,
3716 &brmctx->ip4_other_query,
6db6f0ea 3717 own_query, src);
8ef2a9a5
YH		 3718}
3719
dfd56b8b 3720#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3721static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
3722 struct net_bridge_mcast_port *pmctx,
b0e9a30d 3723 const struct in6_addr *group,
6db6f0ea
FF		 3724 __u16 vid,
3725 const unsigned char *src)
08b202b6
YH		 3726{
3727 struct br_ip br_group;
90010b36 3728 struct bridge_mcast_own_query *own_query;
08b202b6 3729
3c3769e6 3730 if (ipv6_addr_is_ll_all_nodes(group))
08b202b6
YH		 3731 return;
3732
adc47037 3733 own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query;
90010b36 3734
1515a63f 3735 memset(&br_group, 0, sizeof(br_group));
eab3227b 3736 br_group.dst.ip6 = *group;
08b202b6 3737 br_group.proto = htons(ETH_P_IPV6);
b0e9a30d 3738 br_group.vid = vid;
08b202b6 3739
adc47037
NA		 3740 br_multicast_leave_group(brmctx, pmctx, &br_group,
3741 &brmctx->ip6_other_query,
6db6f0ea 3742 own_query, src);
08b202b6
YH		 3743}
3744#endif
8ef2a9a5 3745
1080ab95
NA		 3746static void br_multicast_err_count(const struct net_bridge *br,
3747 const struct net_bridge_port *p,
3748 __be16 proto)
3749{
3750 struct bridge_mcast_stats __percpu *stats;
3751 struct bridge_mcast_stats *pstats;
3752
675779ad 3753 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 3754 return;
3755
3756 if (p)
3757 stats = p->mcast_stats;
3758 else
3759 stats = br->mcast_stats;
3760 if (WARN_ON(!stats))
3761 return;
3762
3763 pstats = this_cpu_ptr(stats);
3764
3765 u64_stats_update_begin(&pstats->syncp);
3766 switch (proto) {
3767 case htons(ETH_P_IP):
3768 pstats->mstats.igmp_parse_errors++;
3769 break;
3770#if IS_ENABLED(CONFIG_IPV6)
3771 case htons(ETH_P_IPV6):
3772 pstats->mstats.mld_parse_errors++;
3773 break;
3774#endif
3775 }
3776 u64_stats_update_end(&pstats->syncp);
3777}
3778
adc47037
NA		 3779static void br_multicast_pim(struct net_bridge_mcast *brmctx,
3780 struct net_bridge_mcast_port *pmctx,
91b02d3d
NA		 3781 const struct sk_buff *skb)
3782{
3783 unsigned int offset = skb_transport_offset(skb);
3784 struct pimhdr *pimhdr, _pimhdr;
3785
3786 pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
3787 if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
3788 pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
3789 return;
3790
adc47037
NA		 3791 spin_lock(&brmctx->br->multicast_lock);
3792 br_ip4_multicast_mark_router(brmctx, pmctx);
3793 spin_unlock(&brmctx->br->multicast_lock);
91b02d3d
NA		 3794}
3795
adc47037
NA		 3796static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3797 struct net_bridge_mcast_port *pmctx,
4b3087c7
LL		 3798 struct sk_buff *skb)
3799{
3800 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3801 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3802 return -ENOMSG;
3803
adc47037
NA		 3804 spin_lock(&brmctx->br->multicast_lock);
3805 br_ip4_multicast_mark_router(brmctx, pmctx);
3806 spin_unlock(&brmctx->br->multicast_lock);
4b3087c7
LL		 3807
3808 return 0;
3809}
3810
adc47037
NA		 3811static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
3812 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3813 struct sk_buff *skb,
3814 u16 vid)
eb1d1641 3815{
adc47037 3816 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
6db6f0ea 3817 const unsigned char *src;
eb1d1641 3818 struct igmphdr *ih;
eb1d1641
HX		 3819 int err;
3820
ba5ea614 3821 err = ip_mc_check_igmp(skb);
eb1d1641 3822
9afd85c9 3823 if (err == -ENOMSG) {
91b02d3d 3824 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
bd4265fe 3825 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
91b02d3d
NA		 3826 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3827 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
adc47037 3828 br_multicast_pim(brmctx, pmctx, skb);
4b3087c7 3829 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
adc47037 3830 br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb);
91b02d3d 3831 }
4b3087c7 3832
eb1d1641 3833 return 0;
9afd85c9 3834 } else if (err < 0) {
adc47037 3835 br_multicast_err_count(brmctx->br, p, skb->protocol);
9afd85c9 3836 return err;
bd4265fe 3837 }
eb1d1641 3838
9afd85c9 3839 ih = igmp_hdr(skb);
6db6f0ea 3840 src = eth_hdr(skb)->h_source;
1080ab95 3841 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
eb1d1641
HX		 3842
3843 switch (ih->type) {
3844 case IGMP_HOST_MEMBERSHIP_REPORT:
3845 case IGMPV2_HOST_MEMBERSHIP_REPORT:
62b2bcb4 3846 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
adc47037
NA		 3847 err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid,
3848 src, true);
eb1d1641
HX		 3849 break;
3850 case IGMPV3_HOST_MEMBERSHIP_REPORT:
adc47037 3851 err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid);
eb1d1641
HX		 3852 break;
3853 case IGMP_HOST_MEMBERSHIP_QUERY:
adc47037 3854 br_ip4_multicast_query(brmctx, pmctx, skb, vid);
eb1d1641
HX		 3855 break;
3856 case IGMP_HOST_LEAVE_MESSAGE:
adc47037 3857 br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src);
eb1d1641
HX		 3858 break;
3859 }
3860
adc47037 3861 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3862 BR_MCAST_DIR_RX);
3863
eb1d1641
HX		 3864 return err;
3865}
3866
dfd56b8b 3867#if IS_ENABLED(CONFIG_IPV6)
adc47037
NA		 3868static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3869 struct net_bridge_mcast_port *pmctx,
99014088 3870 struct sk_buff *skb)
4b3087c7 3871{
4b3087c7 3872 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
99014088 3873 return;
4b3087c7 3874
adc47037
NA		 3875 spin_lock(&brmctx->br->multicast_lock);
3876 br_ip6_multicast_mark_router(brmctx, pmctx);
3877 spin_unlock(&brmctx->br->multicast_lock);
4b3087c7
LL		 3878}
3879
adc47037
NA		 3880static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
3881 struct net_bridge_mcast_port *pmctx,
06499098
VY		 3882 struct sk_buff *skb,
3883 u16 vid)
08b202b6 3884{
adc47037 3885 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
6db6f0ea 3886 const unsigned char *src;
9afd85c9 3887 struct mld_msg *mld;
08b202b6
YH		 3888 int err;
3889
ba5ea614 3890 err = ipv6_mc_check_mld(skb);
08b202b6 3891
99014088 3892 if (err == -ENOMSG || err == -ENODATA) {
9afd85c9
LL		 3893 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3894 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
99014088
LL		 3895 if (err == -ENODATA &&
3896 ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
adc47037 3897 br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
4b3087c7 3898
08b202b6 3899 return 0;
9afd85c9 3900 } else if (err < 0) {
adc47037 3901 br_multicast_err_count(brmctx->br, p, skb->protocol);
9afd85c9 3902 return err;
08b202b6
YH		 3903 }
3904
9afd85c9 3905 mld = (struct mld_msg *)skb_transport_header(skb);
1080ab95 3906 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
08b202b6 3907
9afd85c9 3908 switch (mld->mld_type) {
08b202b6 3909 case ICMPV6_MGM_REPORT:
6db6f0ea 3910 src = eth_hdr(skb)->h_source;
fc2af6c7 3911 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
adc47037
NA		 3912 err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca,
3913 vid, src, true);
08b202b6 3914 break;
08b202b6 3915 case ICMPV6_MLD2_REPORT:
adc47037 3916 err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid);
08b202b6
YH		 3917 break;
3918 case ICMPV6_MGM_QUERY:
adc47037 3919 err = br_ip6_multicast_query(brmctx, pmctx, skb, vid);
08b202b6
YH		 3920 break;
3921 case ICMPV6_MGM_REDUCTION:
6db6f0ea 3922 src = eth_hdr(skb)->h_source;
adc47037
NA		 3923 br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid,
3924 src);
9afd85c9 3925 break;
08b202b6
YH		 3926 }
3927
adc47037 3928 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
1080ab95
NA		 3929 BR_MCAST_DIR_RX);
3930
08b202b6
YH		 3931 return err;
3932}
3933#endif
3934
f4b7002a
NA		 3935int br_multicast_rcv(struct net_bridge_mcast **brmctx,
3936 struct net_bridge_mcast_port **pmctx,
3937 struct net_bridge_vlan *vlan,
06499098 3938 struct sk_buff *skb, u16 vid)
eb1d1641 3939{
1080ab95
NA		 3940 int ret = 0;
3941
1fafc7a9
YH		 3942 BR_INPUT_SKB_CB(skb)->igmp = 0;
3943 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3944
f4b7002a 3945 if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 3946 return 0;
3947
f4b7002a
NA		 3948 if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) {
3949 const struct net_bridge_vlan *masterv;
3950
3951 /* the vlan has the master flag set only when transmitting
3952 * through the bridge device
3953 */
3954 if (br_vlan_is_master(vlan)) {
3955 masterv = vlan;
3956 *brmctx = &vlan->br_mcast_ctx;
3957 *pmctx = NULL;
3958 } else {
3959 masterv = vlan->brvlan;
3960 *brmctx = &vlan->brvlan->br_mcast_ctx;
3961 *pmctx = &vlan->port_mcast_ctx;
3962 }
3963
3964 if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
3965 return 0;
3966 }
3967
eb1d1641
HX		 3968 switch (skb->protocol) {
3969 case htons(ETH_P_IP):
f4b7002a 3970 ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid);
1080ab95 3971 break;
dfd56b8b 3972#if IS_ENABLED(CONFIG_IPV6)
08b202b6 3973 case htons(ETH_P_IPV6):
f4b7002a 3974 ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid);
1080ab95 3975 break;
08b202b6 3976#endif
eb1d1641
HX		 3977 }
3978
1080ab95 3979 return ret;
eb1d1641
HX		 3980}
3981
adc47037 3982static void br_multicast_query_expired(struct net_bridge_mcast *brmctx,
2cd41431
LL		 3983 struct bridge_mcast_own_query *query,
3984 struct bridge_mcast_querier *querier)
cc0fdd80 3985{
adc47037 3986 spin_lock(&brmctx->br->multicast_lock);
4cdd0d10
NA		 3987 if (br_multicast_ctx_vlan_disabled(brmctx))
3988 goto out;
3989
adc47037 3990 if (query->startup_sent < brmctx->multicast_startup_query_count)
cc0fdd80
LL		 3991 query->startup_sent++;
3992
adc47037 3993 br_multicast_send_query(brmctx, NULL, query);
4cdd0d10 3994out:
adc47037 3995 spin_unlock(&brmctx->br->multicast_lock);
cc0fdd80
LL		 3996}
3997
88c1f37f 3998static void br_ip4_multicast_query_expired(struct timer_list *t)
eb1d1641 3999{
d3d065c0
NA		 4000 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
4001 ip4_own_query.timer);
eb1d1641 4002
adc47037 4003 br_multicast_query_expired(brmctx, &brmctx->ip4_own_query,
d3d065c0 4004 &brmctx->ip4_querier);
cc0fdd80 4005}
eb1d1641 4006
cc0fdd80 4007#if IS_ENABLED(CONFIG_IPV6)
88c1f37f 4008static void br_ip6_multicast_query_expired(struct timer_list *t)
cc0fdd80 4009{
d3d065c0
NA		 4010 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
4011 ip6_own_query.timer);
eb1d1641 4012
adc47037 4013 br_multicast_query_expired(brmctx, &brmctx->ip6_own_query,
d3d065c0 4014 &brmctx->ip6_querier);
eb1d1641 4015}
cc0fdd80 4016#endif
eb1d1641 4017
e12cec65 4018static void br_multicast_gc_work(struct work_struct *work)
8b671779
NA		 4019{
4020 struct net_bridge *br = container_of(work, struct net_bridge,
e12cec65 4021 mcast_gc_work);
8b671779
NA		 4022 HLIST_HEAD(deleted_head);
4023
4024 spin_lock_bh(&br->multicast_lock);
e12cec65 4025 hlist_move_list(&br->mcast_gc_list, &deleted_head);
8b671779
NA		 4026 spin_unlock_bh(&br->multicast_lock);
4027
e12cec65 4028 br_multicast_gc(&deleted_head);
8b671779
NA		 4029}
4030
613d61db
NA		 4031void br_multicast_ctx_init(struct net_bridge *br,
4032 struct net_bridge_vlan *vlan,
4033 struct net_bridge_mcast *brmctx)
eb1d1641 4034{
613d61db
NA		 4035 brmctx->br = br;
4036 brmctx->vlan = vlan;
4037 brmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4038 brmctx->multicast_last_member_count = 2;
4039 brmctx->multicast_startup_query_count = 2;
eb1d1641 4040
613d61db
NA		 4041 brmctx->multicast_last_member_interval = HZ;
4042 brmctx->multicast_query_response_interval = 10 * HZ;
4043 brmctx->multicast_startup_query_interval = 125 * HZ / 4;
4044 brmctx->multicast_query_interval = 125 * HZ;
4045 brmctx->multicast_querier_interval = 255 * HZ;
4046 brmctx->multicast_membership_interval = 260 * HZ;
4047
bb18ef8e 4048 brmctx->ip4_querier.port_ifidx = 0;
f936bb42 4049 seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock);
613d61db 4050 brmctx->multicast_igmp_version = 2;
cc0fdd80 4051#if IS_ENABLED(CONFIG_IPV6)
613d61db 4052 brmctx->multicast_mld_version = 1;
bb18ef8e 4053 brmctx->ip6_querier.port_ifidx = 0;
f936bb42 4054 seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock);
cc0fdd80 4055#endif
b00589af 4056
613d61db 4057 timer_setup(&brmctx->ip4_mc_router_timer,
ee5fb222 4058 br_ip4_multicast_local_router_expired, 0);
613d61db 4059 timer_setup(&brmctx->ip4_other_query.timer,
88c1f37f 4060 br_ip4_multicast_querier_expired, 0);
f5c3eb4b
LL		 4061 timer_setup(&brmctx->ip4_other_query.delay_timer,
4062 br_multicast_query_delay_expired, 0);
613d61db 4063 timer_setup(&brmctx->ip4_own_query.timer,
88c1f37f 4064 br_ip4_multicast_query_expired, 0);
cc0fdd80 4065#if IS_ENABLED(CONFIG_IPV6)
613d61db 4066 timer_setup(&brmctx->ip6_mc_router_timer,
a3c02e76 4067 br_ip6_multicast_local_router_expired, 0);
613d61db 4068 timer_setup(&brmctx->ip6_other_query.timer,
88c1f37f 4069 br_ip6_multicast_querier_expired, 0);
f5c3eb4b
LL		 4070 timer_setup(&brmctx->ip6_other_query.delay_timer,
4071 br_multicast_query_delay_expired, 0);
613d61db 4072 timer_setup(&brmctx->ip6_own_query.timer,
88c1f37f 4073 br_ip6_multicast_query_expired, 0);
cc0fdd80 4074#endif
613d61db
NA		 4075}
4076
4077void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
4078{
4079 __br_multicast_stop(brmctx);
4080}
4081
4082void br_multicast_init(struct net_bridge *br)
4083{
4084 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
4085
4086 br_multicast_ctx_init(br, NULL, &br->multicast_ctx);
4087
4088 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
4089 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
4090
4091 spin_lock_init(&br->multicast_lock);
19e3a9c9 4092 INIT_HLIST_HEAD(&br->mdb_list);
e12cec65
NA		 4093 INIT_HLIST_HEAD(&br->mcast_gc_list);
4094 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
eb1d1641
HX		 4095}
4096
4effd28c
LL		 4097static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
4098{
4099 struct in_device *in_dev = in_dev_get(br->dev);
4100
4101 if (!in_dev)
4102 return;
4103
9fb20801 4104 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 4105 in_dev_put(in_dev);
4106}
4107
4108#if IS_ENABLED(CONFIG_IPV6)
4109static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
4110{
4111 struct in6_addr addr;
4112
4113 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
4114 ipv6_dev_mc_inc(br->dev, &addr);
4115}
4116#else
4117static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
4118{
4119}
4120#endif
4121
851d0a73 4122void br_multicast_join_snoopers(struct net_bridge *br)
4effd28c
LL		 4123{
4124 br_ip4_multicast_join_snoopers(br);
4125 br_ip6_multicast_join_snoopers(br);
4126}
4127
4128static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
4129{
4130 struct in_device *in_dev = in_dev_get(br->dev);
4131
4132 if (WARN_ON(!in_dev))
4133 return;
4134
9fb20801 4135 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4effd28c
LL		 4136 in_dev_put(in_dev);
4137}
4138
4139#if IS_ENABLED(CONFIG_IPV6)
4140static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
4141{
4142 struct in6_addr addr;
4143
4144 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
4145 ipv6_dev_mc_dec(br->dev, &addr);
4146}
4147#else
4148static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
4149{
4150}
4151#endif
4152
851d0a73 4153void br_multicast_leave_snoopers(struct net_bridge *br)
4effd28c
LL		 4154{
4155 br_ip4_multicast_leave_snoopers(br);
4156 br_ip6_multicast_leave_snoopers(br);
4157}
4158
7b54aaaf
NA		 4159static void __br_multicast_open_query(struct net_bridge *br,
4160 struct bridge_mcast_own_query *query)
eb1d1641 4161{
cc0fdd80 4162 query->startup_sent = 0;
eb1d1641 4163
13cefad2 4164 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
eb1d1641
HX		 4165 return;
4166
cc0fdd80
LL		 4167 mod_timer(&query->timer, jiffies);
4168}
4169
7b54aaaf 4170static void __br_multicast_open(struct net_bridge_mcast *brmctx)
cc0fdd80 4171{
7b54aaaf 4172 __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query);
cc0fdd80 4173#if IS_ENABLED(CONFIG_IPV6)
7b54aaaf 4174 __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query);
cc0fdd80 4175#endif
eb1d1641
HX		 4176}
4177
7b54aaaf
NA		 4178void br_multicast_open(struct net_bridge *br)
4179{
7b54aaaf
NA		 4180 ASSERT_RTNL();
4181
f4b7002a
NA		 4182 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4183 struct net_bridge_vlan_group *vg;
4184 struct net_bridge_vlan *vlan;
4185
4186 vg = br_vlan_group(br);
4187 if (vg) {
4188 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4189 struct net_bridge_mcast *brmctx;
4190
4191 brmctx = &vlan->br_mcast_ctx;
4192 if (br_vlan_is_brentry(vlan) &&
4193 !br_multicast_ctx_vlan_disabled(brmctx))
4194 __br_multicast_open(&vlan->br_mcast_ctx);
4195 }
7b54aaaf 4196 }
cb486ce9
NA		 4197 } else {
4198 __br_multicast_open(&br->multicast_ctx);
7b54aaaf 4199 }
7b54aaaf
NA		 4200}
4201
613d61db 4202static void __br_multicast_stop(struct net_bridge_mcast *brmctx)
eb1d1641 4203{
613d61db
NA		 4204 del_timer_sync(&brmctx->ip4_mc_router_timer);
4205 del_timer_sync(&brmctx->ip4_other_query.timer);
f5c3eb4b 4206 del_timer_sync(&brmctx->ip4_other_query.delay_timer);
613d61db 4207 del_timer_sync(&brmctx->ip4_own_query.timer);
cc0fdd80 4208#if IS_ENABLED(CONFIG_IPV6)
613d61db
NA		 4209 del_timer_sync(&brmctx->ip6_mc_router_timer);
4210 del_timer_sync(&brmctx->ip6_other_query.timer);
f5c3eb4b 4211 del_timer_sync(&brmctx->ip6_other_query.delay_timer);
613d61db 4212 del_timer_sync(&brmctx->ip6_own_query.timer);
cc0fdd80 4213#endif
e10177ab
SA		 4214}
4215
7b54aaaf
NA		 4216void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on)
4217{
4218 struct net_bridge *br;
4219
4220 /* it's okay to check for the flag without the multicast lock because it
4221 * can only change under RTNL -> multicast_lock, we need the latter to
4222 * sync with timers and packets
4223 */
4224 if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED))
4225 return;
4226
4227 if (br_vlan_is_master(vlan)) {
4228 br = vlan->br;
4229
4230 if (!br_vlan_is_brentry(vlan) ||
4231 (on &&
4232 br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx)))
4233 return;
4234
4235 spin_lock_bh(&br->multicast_lock);
4236 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4237 spin_unlock_bh(&br->multicast_lock);
4238
4239 if (on)
4240 __br_multicast_open(&vlan->br_mcast_ctx);
4241 else
4242 __br_multicast_stop(&vlan->br_mcast_ctx);
4243 } else {
4244 struct net_bridge_mcast *brmctx;
4245
4246 brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx);
4247 if (on && br_multicast_ctx_vlan_global_disabled(brmctx))
4248 return;
4249
4250 br = vlan->port->br;
4251 spin_lock_bh(&br->multicast_lock);
4252 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4253 if (on)
4254 __br_multicast_enable_port_ctx(&vlan->port_mcast_ctx);
4255 else
4256 __br_multicast_disable_port_ctx(&vlan->port_mcast_ctx);
4257 spin_unlock_bh(&br->multicast_lock);
4258 }
4259}
4260
affce9a7 4261static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on)
f4b7002a
NA		 4262{
4263 struct net_bridge_port *p;
4264
4265 if (WARN_ON_ONCE(!br_vlan_is_master(vlan)))
4266 return;
4267
4268 list_for_each_entry(p, &vlan->br->port_list, list) {
4269 struct net_bridge_vlan *vport;
4270
4271 vport = br_vlan_find(nbp_vlan_group(p), vlan->vid);
4272 if (!vport)
4273 continue;
4274 br_multicast_toggle_one_vlan(vport, on);
4275 }
affce9a7
NA		 4276
4277 if (br_vlan_is_brentry(vlan))
4278 br_multicast_toggle_one_vlan(vlan, on);
f4b7002a
NA		 4279}
4280
4281int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
4282 struct netlink_ext_ack *extack)
613d61db 4283{
7b54aaaf
NA		 4284 struct net_bridge_vlan_group *vg;
4285 struct net_bridge_vlan *vlan;
f4b7002a 4286 struct net_bridge_port *p;
7b54aaaf 4287
f4b7002a
NA		 4288 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on)
4289 return 0;
4290
4291 if (on && !br_opt_get(br, BROPT_VLAN_ENABLED)) {
4292 NL_SET_ERR_MSG_MOD(extack, "Cannot enable multicast vlan snooping with vlan filtering disabled");
4293 return -EINVAL;
4294 }
7b54aaaf
NA		 4295
4296 vg = br_vlan_group(br);
f4b7002a
NA		 4297 if (!vg)
4298 return 0;
4299
4300 br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on);
4301
4302 /* disable/enable non-vlan mcast contexts based on vlan snooping */
4303 if (on)
4304 __br_multicast_stop(&br->multicast_ctx);
4305 else
4306 __br_multicast_open(&br->multicast_ctx);
4307 list_for_each_entry(p, &br->port_list, list) {
4308 if (on)
4309 br_multicast_disable_port(p);
4310 else
4311 br_multicast_enable_port(p);
4312 }
4313
4314 list_for_each_entry(vlan, &vg->vlan_list, vlist)
4315 br_multicast_toggle_vlan(vlan, on);
4316
4317 return 0;
4318}
4319
9dee572c
NA		 4320bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on)
4321{
4322 ASSERT_RTNL();
4323
4324 /* BR_VLFLAG_GLOBAL_MCAST_ENABLED relies on eventual consistency and
4325 * requires only RTNL to change
4326 */
4327 if (on == !!(vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
4328 return false;
4329
4330 vlan->priv_flags ^= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
4331 br_multicast_toggle_vlan(vlan, on);
4332
4333 return true;
4334}
4335
f4b7002a
NA		 4336void br_multicast_stop(struct net_bridge *br)
4337{
4338 ASSERT_RTNL();
4339
4340 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4341 struct net_bridge_vlan_group *vg;
4342 struct net_bridge_vlan *vlan;
4343
4344 vg = br_vlan_group(br);
4345 if (vg) {
4346 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4347 struct net_bridge_mcast *brmctx;
4348
4349 brmctx = &vlan->br_mcast_ctx;
4350 if (br_vlan_is_brentry(vlan) &&
4351 !br_multicast_ctx_vlan_disabled(brmctx))
4352 __br_multicast_stop(&vlan->br_mcast_ctx);
4353 }
7b54aaaf 4354 }
cb486ce9
NA		 4355 } else {
4356 __br_multicast_stop(&br->multicast_ctx);
7b54aaaf 4357 }
613d61db
NA		 4358}
4359
e10177ab
SA		 4360void br_multicast_dev_del(struct net_bridge *br)
4361{
e10177ab 4362 struct net_bridge_mdb_entry *mp;
8b671779 4363 HLIST_HEAD(deleted_head);
19e3a9c9 4364 struct hlist_node *tmp;
eb1d1641
HX		 4365
4366 spin_lock_bh(&br->multicast_lock);
e12cec65
NA		 4367 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
4368 br_multicast_del_mdb_entry(mp);
4369 hlist_move_list(&br->mcast_gc_list, &deleted_head);
eb1d1641 4370 spin_unlock_bh(&br->multicast_lock);
19e3a9c9 4371
613d61db 4372 br_multicast_ctx_deinit(&br->multicast_ctx);
e12cec65
NA		 4373 br_multicast_gc(&deleted_head);
4374 cancel_work_sync(&br->mcast_gc_work);
8b671779 4375
4329596c 4376 rcu_barrier();
eb1d1641 4377}
0909e117 4378
a97df080 4379int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val)
0909e117 4380{
6ae4ae8e 4381 int err = -EINVAL;
0909e117 4382
a97df080 4383 spin_lock_bh(&brmctx->br->multicast_lock);
0909e117
HX		 4384
4385 switch (val) {
7f0aec7a
NA		 4386 case MDB_RTR_TYPE_DISABLED:
4387 case MDB_RTR_TYPE_PERM:
a97df080 4388 br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM);
d3d065c0 4389 del_timer(&brmctx->ip4_mc_router_timer);
a3c02e76 4390#if IS_ENABLED(CONFIG_IPV6)
d3d065c0 4391 del_timer(&brmctx->ip6_mc_router_timer);
a3c02e76 4392#endif
d3d065c0 4393 brmctx->multicast_router = val;
77041420
YG		 4394 err = 0;
4395 break;
7f0aec7a 4396 case MDB_RTR_TYPE_TEMP_QUERY:
d3d065c0 4397 if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
a97df080 4398 br_mc_router_state_change(brmctx->br, false);
d3d065c0 4399 brmctx->multicast_router = val;
0909e117
HX		 4400 err = 0;
4401 break;
0909e117
HX		 4402 }
4403
a97df080 4404 spin_unlock_bh(&brmctx->br->multicast_lock);
0909e117
HX		 4405
4406 return err;
4407}
4408
ed2d3597 4409static void
adc47037 4410br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted)
7f0aec7a 4411{
ed2d3597 4412 if (!deleted)
7f0aec7a 4413 return;
ed2d3597 4414
a3c02e76
LL		 4415 /* For backwards compatibility for now, only notify if there is
4416 * no multicast router anymore for both IPv4 and IPv6.
4417 */
adc47037 4418 if (!hlist_unhashed(&pmctx->ip4_rlist))
a3c02e76
LL		 4419 return;
4420#if IS_ENABLED(CONFIG_IPV6)
adc47037 4421 if (!hlist_unhashed(&pmctx->ip6_rlist))
a3c02e76
LL		 4422 return;
4423#endif
4424
1e9ca456 4425 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB);
adc47037 4426 br_port_mc_router_state_change(pmctx->port, false);
f12e7d95
NF		 4427
4428 /* don't allow timer refresh */
adc47037
NA		 4429 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP)
4430 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
7f0aec7a
NA		 4431}
4432
a53581d5
NA		 4433int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
4434 unsigned long val)
0909e117 4435{
a53581d5 4436 struct net_bridge_mcast *brmctx;
a55d8246 4437 unsigned long now = jiffies;
6ae4ae8e 4438 int err = -EINVAL;
ed2d3597 4439 bool del = false;
0909e117 4440
a53581d5 4441 brmctx = br_multicast_port_ctx_get_global(pmctx);
ddd0d529 4442 spin_lock_bh(&brmctx->br->multicast_lock);
adc47037 4443 if (pmctx->multicast_router == val) {
a55d8246 4444 /* Refresh the temp router port timer */
adc47037
NA		 4445 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) {
4446 mod_timer(&pmctx->ip4_mc_router_timer,
d3d065c0 4447 now + brmctx->multicast_querier_interval);
a3c02e76 4448#if IS_ENABLED(CONFIG_IPV6)
adc47037 4449 mod_timer(&pmctx->ip6_mc_router_timer,
d3d065c0 4450 now + brmctx->multicast_querier_interval);
a3c02e76
LL		 4451#endif
4452 }
4950cfd1
NA		 4453 err = 0;
4454 goto unlock;
4455 }
0909e117 4456 switch (val) {
7f0aec7a 4457 case MDB_RTR_TYPE_DISABLED:
adc47037
NA		 4458 pmctx->multicast_router = MDB_RTR_TYPE_DISABLED;
4459 del |= br_ip4_multicast_rport_del(pmctx);
4460 del_timer(&pmctx->ip4_mc_router_timer);
4461 del |= br_ip6_multicast_rport_del(pmctx);
a3c02e76 4462#if IS_ENABLED(CONFIG_IPV6)
adc47037 4463 del_timer(&pmctx->ip6_mc_router_timer);
a3c02e76 4464#endif
adc47037 4465 br_multicast_rport_del_notify(pmctx, del);
7f0aec7a
NA		 4466 break;
4467 case MDB_RTR_TYPE_TEMP_QUERY:
adc47037
NA		 4468 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4469 del |= br_ip4_multicast_rport_del(pmctx);
4470 del |= br_ip6_multicast_rport_del(pmctx);
4471 br_multicast_rport_del_notify(pmctx, del);
7f0aec7a
NA		 4472 break;
4473 case MDB_RTR_TYPE_PERM:
adc47037
NA		 4474 pmctx->multicast_router = MDB_RTR_TYPE_PERM;
4475 del_timer(&pmctx->ip4_mc_router_timer);
4476 br_ip4_multicast_add_router(brmctx, pmctx);
a3c02e76 4477#if IS_ENABLED(CONFIG_IPV6)
adc47037 4478 del_timer(&pmctx->ip6_mc_router_timer);
a3c02e76 4479#endif
adc47037 4480 br_ip6_multicast_add_router(brmctx, pmctx);
0909e117 4481 break;
a55d8246 4482 case MDB_RTR_TYPE_TEMP:
adc47037
NA		 4483 pmctx->multicast_router = MDB_RTR_TYPE_TEMP;
4484 br_ip4_multicast_mark_router(brmctx, pmctx);
4485 br_ip6_multicast_mark_router(brmctx, pmctx);
a55d8246 4486 break;
7f0aec7a
NA		 4487 default:
4488 goto unlock;
0909e117 4489 }
7f0aec7a
NA		 4490 err = 0;
4491unlock:
ddd0d529 4492 spin_unlock_bh(&brmctx->br->multicast_lock);
0909e117
HX		 4493
4494 return err;
4495}
561f1103 4496
2796d846
NA		 4497int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router)
4498{
4499 int err;
4500
4501 if (br_vlan_is_master(v))
4502 err = br_multicast_set_router(&v->br_mcast_ctx, mcast_router);
4503 else
4504 err = br_multicast_set_port_router(&v->port_mcast_ctx,
4505 mcast_router);
4506
4507 return err;
4508}
4509
adc47037 4510static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
90010b36 4511 struct bridge_mcast_own_query *query)
561f1103
HX		 4512{
4513 struct net_bridge_port *port;
74857216 4514
cb486ce9
NA		 4515 if (!br_multicast_ctx_matches_vlan_snooping(brmctx))
4516 return;
4517
7b54aaaf 4518 __br_multicast_open_query(brmctx->br, query);
74857216 4519
c5b493ce 4520 rcu_read_lock();
adc47037 4521 list_for_each_entry_rcu(port, &brmctx->br->port_list, list) {
615cc23e
NA		 4522 struct bridge_mcast_own_query *ip4_own_query;
4523#if IS_ENABLED(CONFIG_IPV6)
4524 struct bridge_mcast_own_query *ip6_own_query;
4525#endif
4526
4527 if (br_multicast_port_ctx_state_stopped(&port->multicast_ctx))
74857216
HX		 4528 continue;
4529
615cc23e
NA		 4530 if (br_multicast_ctx_is_vlan(brmctx)) {
4531 struct net_bridge_vlan *vlan;
4532
3f0d14ef
NA		 4533 vlan = br_vlan_find(nbp_vlan_group_rcu(port),
4534 brmctx->vlan->vid);
615cc23e
NA		 4535 if (!vlan ||
4536 br_multicast_port_ctx_state_stopped(&vlan->port_mcast_ctx))
4537 continue;
4538
4539 ip4_own_query = &vlan->port_mcast_ctx.ip4_own_query;
4540#if IS_ENABLED(CONFIG_IPV6)
4541 ip6_own_query = &vlan->port_mcast_ctx.ip6_own_query;
4542#endif
4543 } else {
4544 ip4_own_query = &port->multicast_ctx.ip4_own_query;
4545#if IS_ENABLED(CONFIG_IPV6)
4546 ip6_own_query = &port->multicast_ctx.ip6_own_query;
4547#endif
4548 }
4549
adc47037 4550 if (query == &brmctx->ip4_own_query)
615cc23e 4551 br_multicast_enable(ip4_own_query);
cc0fdd80
LL		 4552#if IS_ENABLED(CONFIG_IPV6)
4553 else
615cc23e 4554 br_multicast_enable(ip6_own_query);
cc0fdd80 4555#endif
74857216 4556 }
c5b493ce 4557 rcu_read_unlock();
74857216
HX		 4558}
4559
ae1ea84b
FF		 4560int br_multicast_toggle(struct net_bridge *br, unsigned long val,
4561 struct netlink_ext_ack *extack)
74857216 4562{
7cb3f921 4563 struct net_bridge_port *port;
851d0a73 4564 bool change_snoopers = false;
ae1ea84b 4565 int err = 0;
561f1103 4566
ef5e0d82 4567 spin_lock_bh(&br->multicast_lock);
13cefad2 4568 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
561f1103
HX		 4569 goto unlock;
4570
ae1ea84b
FF		 4571 err = br_mc_disabled_update(br->dev, val, extack);
4572 if (err == -EOPNOTSUPP)
4573 err = 0;
4574 if (err)
4575 goto unlock;
4576
13cefad2 4577 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4effd28c 4578 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
851d0a73 4579 change_snoopers = true;
561f1103 4580 goto unlock;
4effd28c 4581 }
561f1103 4582
3a7fda06
HX		 4583 if (!netif_running(br->dev))
4584 goto unlock;
4585
7cb3f921
NA		 4586 br_multicast_open(br);
4587 list_for_each_entry(port, &br->port_list, list)
adc47037 4588 __br_multicast_enable_port_ctx(&port->multicast_ctx);
561f1103 4589
851d0a73
JH		 4590 change_snoopers = true;
4591
561f1103 4592unlock:
ef5e0d82 4593 spin_unlock_bh(&br->multicast_lock);
561f1103 4594
851d0a73
JH		 4595 /* br_multicast_join_snoopers has the potential to cause
4596 * an MLD Report/Leave to be delivered to br_multicast_rcv,
4597 * which would in turn call br_multicast_add_group, which would
4598 * attempt to acquire multicast_lock. This function should be
4599 * called after the lock has been released to avoid deadlocks on
4600 * multicast_lock.
4601 *
4602 * br_multicast_leave_snoopers does not have the problem since
4603 * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
4604 * returns without calling br_multicast_ipv4/6_rcv if it's not
4605 * enabled. Moved both functions out just for symmetry.
4606 */
4607 if (change_snoopers) {
4608 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
4609 br_multicast_join_snoopers(br);
4610 else
4611 br_multicast_leave_snoopers(br);
4612 }
4613
ae1ea84b 4614 return err;
561f1103 4615}
b195167f 4616
9341b988
IS		 4617bool br_multicast_enabled(const struct net_device *dev)
4618{
4619 struct net_bridge *br = netdev_priv(dev);
4620
13cefad2 4621 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
9341b988
IS		 4622}
4623EXPORT_SYMBOL_GPL(br_multicast_enabled);
4624
0912bda4
YG		 4625bool br_multicast_router(const struct net_device *dev)
4626{
4627 struct net_bridge *br = netdev_priv(dev);
4628 bool is_router;
4629
4630 spin_lock_bh(&br->multicast_lock);
adc47037 4631 is_router = br_multicast_is_router(&br->multicast_ctx, NULL);
0912bda4
YG		 4632 spin_unlock_bh(&br->multicast_lock);
4633 return is_router;
4634}
4635EXPORT_SYMBOL_GPL(br_multicast_router);
4636
62938182 4637int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val)
c5c23260 4638{
b00589af
LL		 4639 unsigned long max_delay;
4640
c5c23260
HX		 4641 val = !!val;
4642
62938182 4643 spin_lock_bh(&brmctx->br->multicast_lock);
4d5b4e84 4644 if (brmctx->multicast_querier == val)
c5c23260
HX		 4645 goto unlock;
4646
4d5b4e84 4647 WRITE_ONCE(brmctx->multicast_querier, val);
b00589af
LL		 4648 if (!val)
4649 goto unlock;
4650
d3d065c0 4651 max_delay = brmctx->multicast_query_response_interval;
b00589af 4652
d3d065c0 4653 if (!timer_pending(&brmctx->ip4_other_query.timer))
f5c3eb4b
LL		 4654 mod_timer(&brmctx->ip4_other_query.delay_timer,
4655 jiffies + max_delay);
cc0fdd80 4656
adc47037 4657 br_multicast_start_querier(brmctx, &brmctx->ip4_own_query);
cc0fdd80
LL		 4658
4659#if IS_ENABLED(CONFIG_IPV6)
d3d065c0 4660 if (!timer_pending(&brmctx->ip6_other_query.timer))
f5c3eb4b
LL		 4661 mod_timer(&brmctx->ip6_other_query.delay_timer,
4662 jiffies + max_delay);
cc0fdd80 4663
adc47037 4664 br_multicast_start_querier(brmctx, &brmctx->ip6_own_query);
cc0fdd80 4665#endif
c5c23260
HX		 4666
4667unlock:
62938182 4668 spin_unlock_bh(&brmctx->br->multicast_lock);
c5c23260
HX		 4669
4670 return 0;
4671}
4672
df271cd6
NA		 4673int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
4674 unsigned long val)
5e923585
NA		 4675{
4676 /* Currently we support only version 2 and 3 */
4677 switch (val) {
4678 case 2:
4679 case 3:
4680 break;
4681 default:
4682 return -EINVAL;
4683 }
4684
df271cd6
NA		 4685 spin_lock_bh(&brmctx->br->multicast_lock);
4686 brmctx->multicast_igmp_version = val;
4687 spin_unlock_bh(&brmctx->br->multicast_lock);
5e923585
NA		 4688
4689 return 0;
4690}
4691
aa2ae3e7 4692#if IS_ENABLED(CONFIG_IPV6)
df271cd6
NA		 4693int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
4694 unsigned long val)
aa2ae3e7
NA		 4695{
4696 /* Currently we support version 1 and 2 */
4697 switch (val) {
4698 case 1:
4699 case 2:
4700 break;
4701 default:
4702 return -EINVAL;
4703 }
4704
df271cd6
NA		 4705 spin_lock_bh(&brmctx->br->multicast_lock);
4706 brmctx->multicast_mld_version = val;
4707 spin_unlock_bh(&brmctx->br->multicast_lock);
aa2ae3e7
NA		 4708
4709 return 0;
4710}
4711#endif
4712
99b40610
NA		 4713void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
4714 unsigned long val)
4715{
4716 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4717
4718 if (intvl_jiffies < BR_MULTICAST_QUERY_INTVL_MIN) {
4719 br_info(brmctx->br,
4720 "trying to set multicast query interval below minimum, setting to %lu (%ums)\n",
4721 jiffies_to_clock_t(BR_MULTICAST_QUERY_INTVL_MIN),
4722 jiffies_to_msecs(BR_MULTICAST_QUERY_INTVL_MIN));
4723 intvl_jiffies = BR_MULTICAST_QUERY_INTVL_MIN;
4724 }
4725
4726 brmctx->multicast_query_interval = intvl_jiffies;
4727}
4728
f83a112b
NA		 4729void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
4730 unsigned long val)
4731{
4732 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4733
4734 if (intvl_jiffies < BR_MULTICAST_STARTUP_QUERY_INTVL_MIN) {
4735 br_info(brmctx->br,
4736 "trying to set multicast startup query interval below minimum, setting to %lu (%ums)\n",
4737 jiffies_to_clock_t(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN),
4738 jiffies_to_msecs(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN));
4739 intvl_jiffies = BR_MULTICAST_STARTUP_QUERY_INTVL_MIN;
4740 }
4741
4742 brmctx->multicast_startup_query_interval = intvl_jiffies;
4743}
4744
07f8ac4a
LL		 4745/**
4746 * br_multicast_list_adjacent - Returns snooped multicast addresses
4747 * @dev: The bridge port adjacent to which to retrieve addresses
4748 * @br_ip_list: The list to store found, snooped multicast IP addresses in
4749 *
4750 * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
4751 * snooping feature on all bridge ports of dev's bridge device, excluding
4752 * the addresses from dev itself.
4753 *
4754 * Returns the number of items added to br_ip_list.
4755 *
4756 * Notes:
4757 * - br_ip_list needs to be initialized by caller
4758 * - br_ip_list might contain duplicates in the end
4759 * (needs to be taken care of by caller)
4760 * - br_ip_list needs to be freed by caller
4761 */
4762int br_multicast_list_adjacent(struct net_device *dev,
4763 struct list_head *br_ip_list)
4764{
4765 struct net_bridge *br;
4766 struct net_bridge_port *port;
4767 struct net_bridge_port_group *group;
4768 struct br_ip_list *entry;
4769 int count = 0;
4770
4771 rcu_read_lock();
35f861e3 4772 if (!br_ip_list || !netif_is_bridge_port(dev))
07f8ac4a
LL		 4773 goto unlock;
4774
4775 port = br_port_get_rcu(dev);
4776 if (!port || !port->br)
4777 goto unlock;
4778
4779 br = port->br;
4780
4781 list_for_each_entry_rcu(port, &br->port_list, list) {
4782 if (!port->dev || port->dev == dev)
4783 continue;
4784
4785 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
4786 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
4787 if (!entry)
4788 goto unlock;
4789
085b53c8 4790 entry->addr = group->key.addr;
07f8ac4a
LL		 4791 list_add(&entry->list, br_ip_list);
4792 count++;
4793 }
4794 }
4795
4796unlock:
4797 rcu_read_unlock();
4798 return count;
4799}
4800EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
2cd41431 4801
c34963e2
LL		 4802/**
4803 * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
4804 * @dev: The bridge port providing the bridge on which to check for a querier
4805 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4806 *
4807 * Checks whether the given interface has a bridge on top and if so returns
4808 * true if a valid querier exists anywhere on the bridged link layer.
4809 * Otherwise returns false.
4810 */
4811bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
4812{
4813 struct net_bridge *br;
4814 struct net_bridge_port *port;
4815 struct ethhdr eth;
4816 bool ret = false;
4817
4818 rcu_read_lock();
35f861e3 4819 if (!netif_is_bridge_port(dev))
c34963e2
LL		 4820 goto unlock;
4821
4822 port = br_port_get_rcu(dev);
4823 if (!port || !port->br)
4824 goto unlock;
4825
4826 br = port->br;
4827
4828 memset(&eth, 0, sizeof(eth));
4829 eth.h_proto = htons(proto);
4830
adc47037 4831 ret = br_multicast_querier_exists(&br->multicast_ctx, &eth, NULL);
c34963e2
LL		 4832
4833unlock:
4834 rcu_read_unlock();
4835 return ret;
4836}
4837EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
4838
2cd41431
LL		 4839/**
4840 * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
4841 * @dev: The bridge port adjacent to which to check for a querier
4842 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4843 *
4844 * Checks whether the given interface has a bridge on top and if so returns
4845 * true if a selected querier is behind one of the other ports of this
4846 * bridge. Otherwise returns false.
4847 */
4848bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
4849{
d3d065c0 4850 struct net_bridge_mcast *brmctx;
2cd41431
LL		 4851 struct net_bridge *br;
4852 struct net_bridge_port *port;
4853 bool ret = false;
bb18ef8e 4854 int port_ifidx;
2cd41431
LL		 4855
4856 rcu_read_lock();
35f861e3 4857 if (!netif_is_bridge_port(dev))
2cd41431
LL		 4858 goto unlock;
4859
4860 port = br_port_get_rcu(dev);
4861 if (!port || !port->br)
4862 goto unlock;
4863
4864 br = port->br;
d3d065c0 4865 brmctx = &br->multicast_ctx;
2cd41431
LL		 4866
4867 switch (proto) {
4868 case ETH_P_IP:
bb18ef8e 4869 port_ifidx = brmctx->ip4_querier.port_ifidx;
d3d065c0 4870 if (!timer_pending(&brmctx->ip4_other_query.timer) ||
bb18ef8e 4871 port_ifidx == port->dev->ifindex)
2cd41431
LL		 4872 goto unlock;
4873 break;
3993c4e1 4874#if IS_ENABLED(CONFIG_IPV6)
2cd41431 4875 case ETH_P_IPV6:
bb18ef8e 4876 port_ifidx = brmctx->ip6_querier.port_ifidx;
d3d065c0 4877 if (!timer_pending(&brmctx->ip6_other_query.timer) ||
bb18ef8e 4878 port_ifidx == port->dev->ifindex)
2cd41431
LL		 4879 goto unlock;
4880 break;
3993c4e1 4881#endif
2cd41431
LL		 4882 default:
4883 goto unlock;
4884 }
4885
4886 ret = true;
4887unlock:
4888 rcu_read_unlock();
4889 return ret;
4890}
4891EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
1080ab95 4892
3b85f9ba
LL		 4893/**
4894 * br_multicast_has_router_adjacent - Checks for a router behind a bridge port
4895 * @dev: The bridge port adjacent to which to check for a multicast router
4896 * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
4897 *
4898 * Checks whether the given interface has a bridge on top and if so returns
4899 * true if a multicast router is behind one of the other ports of this
4900 * bridge. Otherwise returns false.
4901 */
4902bool br_multicast_has_router_adjacent(struct net_device *dev, int proto)
4903{
9632233e 4904 struct net_bridge_mcast_port *pmctx;
d3d065c0 4905 struct net_bridge_mcast *brmctx;
9632233e 4906 struct net_bridge_port *port;
3b85f9ba
LL		 4907 bool ret = false;
4908
4909 rcu_read_lock();
4910 port = br_port_get_check_rcu(dev);
4911 if (!port)
4912 goto unlock;
4913
d3d065c0 4914 brmctx = &port->br->multicast_ctx;
3b85f9ba
LL		 4915 switch (proto) {
4916 case ETH_P_IP:
d3d065c0 4917 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
3b85f9ba 4918 ip4_rlist) {
9632233e 4919 if (pmctx->port == port)
3b85f9ba
LL		 4920 continue;
4921
4922 ret = true;
4923 goto unlock;
4924 }
4925 break;
4926#if IS_ENABLED(CONFIG_IPV6)
4927 case ETH_P_IPV6:
d3d065c0 4928 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
3b85f9ba 4929 ip6_rlist) {
9632233e 4930 if (pmctx->port == port)
3b85f9ba
LL		 4931 continue;
4932
4933 ret = true;
4934 goto unlock;
4935 }
4936 break;
4937#endif
4938 default:
4939 /* when compiled without IPv6 support, be conservative and
4940 * always assume presence of an IPv6 multicast router
4941 */
4942 ret = true;
4943 }
4944
4945unlock:
4946 rcu_read_unlock();
4947 return ret;
4948}
4949EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);
4950
1080ab95 4951static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
a65056ec 4952 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 4953{
4954 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
a65056ec
NA		 4955 __be16 proto = skb->protocol;
4956 unsigned int t_len;
1080ab95
NA		 4957
4958 u64_stats_update_begin(&pstats->syncp);
4959 switch (proto) {
4960 case htons(ETH_P_IP):
a65056ec 4961 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
1080ab95
NA		 4962 switch (type) {
4963 case IGMP_HOST_MEMBERSHIP_REPORT:
4964 pstats->mstats.igmp_v1reports[dir]++;
4965 break;
4966 case IGMPV2_HOST_MEMBERSHIP_REPORT:
4967 pstats->mstats.igmp_v2reports[dir]++;
4968 break;
4969 case IGMPV3_HOST_MEMBERSHIP_REPORT:
4970 pstats->mstats.igmp_v3reports[dir]++;
4971 break;
4972 case IGMP_HOST_MEMBERSHIP_QUERY:
a65056ec
NA		 4973 if (t_len != sizeof(struct igmphdr)) {
4974 pstats->mstats.igmp_v3queries[dir]++;
4975 } else {
4976 unsigned int offset = skb_transport_offset(skb);
4977 struct igmphdr *ih, _ihdr;
4978
4979 ih = skb_header_pointer(skb, offset,
4980 sizeof(_ihdr), &_ihdr);
4981 if (!ih)
4982 break;
4983 if (!ih->code)
4984 pstats->mstats.igmp_v1queries[dir]++;
4985 else
4986 pstats->mstats.igmp_v2queries[dir]++;
4987 }
1080ab95
NA		 4988 break;
4989 case IGMP_HOST_LEAVE_MESSAGE:
4990 pstats->mstats.igmp_leaves[dir]++;
4991 break;
4992 }
4993 break;
4994#if IS_ENABLED(CONFIG_IPV6)
4995 case htons(ETH_P_IPV6):
a65056ec
NA		 4996 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
4997 sizeof(struct ipv6hdr);
4998 t_len -= skb_network_header_len(skb);
1080ab95
NA		 4999 switch (type) {
5000 case ICMPV6_MGM_REPORT:
5001 pstats->mstats.mld_v1reports[dir]++;
5002 break;
5003 case ICMPV6_MLD2_REPORT:
5004 pstats->mstats.mld_v2reports[dir]++;
5005 break;
5006 case ICMPV6_MGM_QUERY:
a65056ec
NA		 5007 if (t_len != sizeof(struct mld_msg))
5008 pstats->mstats.mld_v2queries[dir]++;
5009 else
5010 pstats->mstats.mld_v1queries[dir]++;
1080ab95
NA		 5011 break;
5012 case ICMPV6_MGM_REDUCTION:
5013 pstats->mstats.mld_leaves[dir]++;
5014 break;
5015 }
5016 break;
5017#endif /* CONFIG_IPV6 */
5018 }
5019 u64_stats_update_end(&pstats->syncp);
5020}
5021
adc47037
NA		 5022void br_multicast_count(struct net_bridge *br,
5023 const struct net_bridge_port *p,
a65056ec 5024 const struct sk_buff *skb, u8 type, u8 dir)
1080ab95
NA		 5025{
5026 struct bridge_mcast_stats __percpu *stats;
5027
5028 /* if multicast_disabled is true then igmp type can't be set */
675779ad 5029 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
1080ab95
NA		 5030 return;
5031
5032 if (p)
5033 stats = p->mcast_stats;
5034 else
5035 stats = br->mcast_stats;
5036 if (WARN_ON(!stats))
5037 return;
5038
a65056ec 5039 br_mcast_stats_add(stats, skb, type, dir);
1080ab95
NA		 5040}
5041
5042int br_multicast_init_stats(struct net_bridge *br)
5043{
5044 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
5045 if (!br->mcast_stats)
5046 return -ENOMEM;
5047
5048 return 0;
5049}
5050
b6fe0440
IS		 5051void br_multicast_uninit_stats(struct net_bridge *br)
5052{
5053 free_percpu(br->mcast_stats);
5054}
5055
b3b6a84c
AB		 5056/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
5057static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
1080ab95
NA		 5058{
5059 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
5060 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
5061}
5062
5063void br_multicast_get_stats(const struct net_bridge *br,
5064 const struct net_bridge_port *p,
5065 struct br_mcast_stats *dest)
5066{
5067 struct bridge_mcast_stats __percpu *stats;
5068 struct br_mcast_stats tdst;
5069 int i;
5070
5071 memset(dest, 0, sizeof(*dest));
5072 if (p)
5073 stats = p->mcast_stats;
5074 else
5075 stats = br->mcast_stats;
5076 if (WARN_ON(!stats))
5077 return;
5078
5079 memset(&tdst, 0, sizeof(tdst));
5080 for_each_possible_cpu(i) {
5081 struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
5082 struct br_mcast_stats temp;
5083 unsigned int start;
5084
5085 do {
d120d1a6 5086 start = u64_stats_fetch_begin(&cpu_stats->syncp);
1080ab95 5087 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
d120d1a6 5088 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
1080ab95 5089
a65056ec
NA		 5090 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
5091 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
5092 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
1080ab95
NA		 5093 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
5094 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
5095 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
5096 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
5097 tdst.igmp_parse_errors += temp.igmp_parse_errors;
5098
a65056ec
NA		 5099 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
5100 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
1080ab95
NA		 5101 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
5102 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
5103 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
5104 tdst.mld_parse_errors += temp.mld_parse_errors;
5105 }
5106 memcpy(dest, &tdst, sizeof(*dest));
5107}
19e3a9c9
NA		 5108
5109int br_mdb_hash_init(struct net_bridge *br)
5110{
085b53c8
NA		 5111 int err;
5112
5113 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
5114 if (err)
5115 return err;
5116
5117 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
5118 if (err) {
5119 rhashtable_destroy(&br->sg_port_tbl);
5120 return err;
5121 }
5122
5123 return 0;
19e3a9c9
NA		 5124}
5125
5126void br_mdb_hash_fini(struct net_bridge *br)
5127{
085b53c8 5128 rhashtable_destroy(&br->sg_port_tbl);
19e3a9c9
NA		 5129 rhashtable_destroy(&br->mdb_hash_tbl);
5130}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git