1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Bridge multicast support.
5 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
9 #include <linux/export.h>
10 #include <linux/if_ether.h>
11 #include <linux/igmp.h>
13 #include <linux/jhash.h>
14 #include <linux/kernel.h>
15 #include <linux/log2.h>
16 #include <linux/netdevice.h>
17 #include <linux/netfilter_bridge.h>
18 #include <linux/random.h>
19 #include <linux/rculist.h>
20 #include <linux/skbuff.h>
21 #include <linux/slab.h>
22 #include <linux/timer.h>
23 #include <linux/inetdevice.h>
24 #include <linux/mroute.h>
26 #include <net/switchdev.h>
27 #if IS_ENABLED(CONFIG_IPV6)
28 #include <linux/icmpv6.h>
31 #include <net/ip6_checksum.h>
32 #include <net/addrconf.h>
34 #include <trace/events/bridge.h>
36 #include "br_private.h"
37 #include "br_private_mcast_eht.h"
39 static 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,
46 static 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,
53 static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
54 struct bridge_mcast_own_query *query);
55 static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
56 struct net_bridge_mcast_port *pmctx);
57 static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
58 struct net_bridge_mcast_port *pmctx,
61 const unsigned char *src);
62 static void br_multicast_port_group_rexmit(struct timer_list *t);
65 br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted);
66 static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
67 struct net_bridge_mcast_port *pmctx);
68 #if IS_ENABLED(CONFIG_IPV6)
69 static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
70 struct net_bridge_mcast_port *pmctx,
71 const struct in6_addr *group,
72 __u16 vid, const unsigned char *src);
74 static struct net_bridge_port_group *
75 __br_multicast_add_group(struct net_bridge_mcast *brmctx,
76 struct net_bridge_mcast_port *pmctx,
78 const unsigned char *src,
82 static void br_multicast_find_del_pg(struct net_bridge *br,
83 struct net_bridge_port_group *pg);
84 static void __br_multicast_stop(struct net_bridge_mcast *brmctx);
86 static int br_mc_disabled_update(struct net_device *dev, bool value,
87 struct netlink_ext_ack *extack);
89 static struct net_bridge_port_group *
90 br_sg_port_find(struct net_bridge *br,
91 struct net_bridge_port_group_sg_key *sg_p)
93 lockdep_assert_held_once(&br->multicast_lock);
95 return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
96 br_sg_port_rht_params);
99 static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
102 return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
105 struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
108 struct net_bridge_mdb_entry *ent;
110 lockdep_assert_held_once(&br->multicast_lock);
113 ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
119 static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
120 __be32 dst, __u16 vid)
124 memset(&br_dst, 0, sizeof(br_dst));
125 br_dst.dst.ip4 = dst;
126 br_dst.proto = htons(ETH_P_IP);
129 return br_mdb_ip_get(br, &br_dst);
132 #if IS_ENABLED(CONFIG_IPV6)
133 static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
134 const struct in6_addr *dst,
139 memset(&br_dst, 0, sizeof(br_dst));
140 br_dst.dst.ip6 = *dst;
141 br_dst.proto = htons(ETH_P_IPV6);
144 return br_mdb_ip_get(br, &br_dst);
148 struct net_bridge_mdb_entry *
149 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
152 struct net_bridge *br = brmctx->br;
155 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
156 br_multicast_ctx_vlan_global_disabled(brmctx))
159 if (BR_INPUT_SKB_CB(skb)->igmp)
162 memset(&ip, 0, sizeof(ip));
163 ip.proto = skb->protocol;
166 switch (skb->protocol) {
167 case htons(ETH_P_IP):
168 ip.dst.ip4 = ip_hdr(skb)->daddr;
169 if (brmctx->multicast_igmp_version == 3) {
170 struct net_bridge_mdb_entry *mdb;
172 ip.src.ip4 = ip_hdr(skb)->saddr;
173 mdb = br_mdb_ip_get_rcu(br, &ip);
179 #if IS_ENABLED(CONFIG_IPV6)
180 case htons(ETH_P_IPV6):
181 ip.dst.ip6 = ipv6_hdr(skb)->daddr;
182 if (brmctx->multicast_mld_version == 2) {
183 struct net_bridge_mdb_entry *mdb;
185 ip.src.ip6 = ipv6_hdr(skb)->saddr;
186 mdb = br_mdb_ip_get_rcu(br, &ip);
189 memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
195 ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
198 return br_mdb_ip_get_rcu(br, &ip);
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
209 static struct net_bridge_mcast_port *
210 br_multicast_pg_to_port_ctx(const struct net_bridge_port_group *pg)
212 struct net_bridge_mcast_port *pmctx = &pg->key.port->multicast_ctx;
213 struct net_bridge_vlan *vlan;
215 lockdep_assert_held_once(&pg->key.port->br->multicast_lock);
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))
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
229 vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid);
230 if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx))
231 pmctx = &vlan->port_mcast_ctx;
239 static struct net_bridge_mcast_port *
240 br_multicast_port_vid_to_port_ctx(struct net_bridge_port *port, u16 vid)
242 struct net_bridge_mcast_port *pmctx = NULL;
243 struct net_bridge_vlan *vlan;
245 lockdep_assert_held_once(&port->br->multicast_lock);
247 if (!br_opt_get(port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED))
250 /* Take RCU to access the vlan. */
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;
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
268 br_multicast_ctx_should_use(const struct net_bridge_mcast *brmctx,
269 const struct net_bridge_mcast_port *pmctx)
271 if (!netif_running(brmctx->br->dev))
275 return !br_multicast_port_ctx_state_disabled(pmctx);
277 return !br_multicast_ctx_vlan_disabled(brmctx);
280 static bool br_port_group_equal(struct net_bridge_port_group *p,
281 struct net_bridge_port *port,
282 const unsigned char *src)
284 if (p->key.port != port)
287 if (!(port->flags & BR_MULTICAST_TO_UNICAST))
290 return ether_addr_equal(src, p->eth_addr);
293 static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx,
294 struct net_bridge_port_group *pg,
297 struct net_bridge_port_group_sg_key sg_key;
298 struct net_bridge_port_group *src_pg;
299 struct net_bridge_mcast *brmctx;
301 memset(&sg_key, 0, sizeof(sg_key));
302 brmctx = br_multicast_port_ctx_get_global(pmctx);
303 sg_key.port = pg->key.port;
304 sg_key.addr = *sg_ip;
305 if (br_sg_port_find(brmctx->br, &sg_key))
308 src_pg = __br_multicast_add_group(brmctx, pmctx,
310 MCAST_INCLUDE, false, false);
311 if (IS_ERR_OR_NULL(src_pg) ||
312 src_pg->rt_protocol != RTPROT_KERNEL)
315 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
318 static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
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;
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)
333 br_multicast_find_del_pg(br, src_pg);
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).
344 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
347 struct net_bridge *br = pg->key.port->br;
348 struct net_bridge_port_group *pg_lst;
349 struct net_bridge_mcast_port *pmctx;
350 struct net_bridge_mdb_entry *mp;
353 if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
356 mp = br_mdb_ip_get(br, &pg->key.addr);
359 pmctx = br_multicast_pg_to_port_ctx(pg);
363 memset(&sg_ip, 0, sizeof(sg_ip));
364 sg_ip = pg->key.addr;
366 for (pg_lst = mlock_dereference(mp->ports, br);
368 pg_lst = mlock_dereference(pg_lst->next, br)) {
369 struct net_bridge_group_src *src_ent;
373 hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
374 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
376 sg_ip.src = src_ent->addr.src;
377 switch (filter_mode) {
379 __fwd_del_star_excl(pg, &sg_ip);
382 __fwd_add_star_excl(pmctx, pg, &sg_ip);
389 /* called when adding a new S,G with host_joined == false by default */
390 static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
391 struct net_bridge_port_group *sg)
393 struct net_bridge_mdb_entry *sg_mp;
395 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
397 if (!star_mp->host_joined)
400 sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
403 sg_mp->host_joined = true;
406 /* set the host_joined state of all of *,G's S,G entries */
407 static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
409 struct net_bridge *br = star_mp->br;
410 struct net_bridge_mdb_entry *sg_mp;
411 struct net_bridge_port_group *pg;
414 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
417 memset(&sg_ip, 0, sizeof(sg_ip));
418 sg_ip = star_mp->addr;
419 for (pg = mlock_dereference(star_mp->ports, br);
421 pg = mlock_dereference(pg->next, br)) {
422 struct net_bridge_group_src *src_ent;
424 hlist_for_each_entry(src_ent, &pg->src_list, node) {
425 if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
427 sg_ip.src = src_ent->addr.src;
428 sg_mp = br_mdb_ip_get(br, &sg_ip);
431 sg_mp->host_joined = star_mp->host_joined;
436 static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
438 struct net_bridge_port_group __rcu **pp;
439 struct net_bridge_port_group *p;
441 /* *,G exclude ports are only added to S,G entries */
442 if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
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
448 for (pp = &sgmp->ports;
449 (p = mlock_dereference(*pp, sgmp->br)) != NULL;
451 if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
452 MDB_PG_FLAGS_PERMANENT)))
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
459 sgmp->host_joined = false;
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);
470 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
471 struct net_bridge_port_group *sg)
473 struct net_bridge_port_group_sg_key sg_key;
474 struct net_bridge *br = star_mp->br;
475 struct net_bridge_mcast_port *pmctx;
476 struct net_bridge_port_group *pg;
477 struct net_bridge_mcast *brmctx;
479 if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
481 if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
484 br_multicast_sg_host_state(star_mp, sg);
485 memset(&sg_key, 0, sizeof(sg_key));
486 sg_key.addr = sg->key.addr;
487 /* we need to add all exclude ports to the S,G */
488 for (pg = mlock_dereference(star_mp->ports, br);
490 pg = mlock_dereference(pg->next, br)) {
491 struct net_bridge_port_group *src_pg;
493 if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
496 sg_key.port = pg->key.port;
497 if (br_sg_port_find(br, &sg_key))
500 pmctx = br_multicast_pg_to_port_ctx(pg);
503 brmctx = br_multicast_port_ctx_get_global(pmctx);
505 src_pg = __br_multicast_add_group(brmctx, pmctx,
508 MCAST_INCLUDE, false, false);
509 if (IS_ERR_OR_NULL(src_pg) ||
510 src_pg->rt_protocol != RTPROT_KERNEL)
512 src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
516 static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
518 struct net_bridge_mdb_entry *star_mp;
519 struct net_bridge_mcast_port *pmctx;
520 struct net_bridge_port_group *sg;
521 struct net_bridge_mcast *brmctx;
524 if (src->flags & BR_SGRP_F_INSTALLED)
527 memset(&sg_ip, 0, sizeof(sg_ip));
528 pmctx = br_multicast_pg_to_port_ctx(src->pg);
531 brmctx = br_multicast_port_ctx_get_global(pmctx);
532 sg_ip = src->pg->key.addr;
533 sg_ip.src = src->addr.src;
535 sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip,
536 src->pg->eth_addr, MCAST_INCLUDE, false,
537 !timer_pending(&src->timer));
538 if (IS_ERR_OR_NULL(sg))
540 src->flags |= BR_SGRP_F_INSTALLED;
541 sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
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))
548 /* the kernel is now responsible for removing this S,G */
549 del_timer(&sg->timer);
550 star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
554 br_multicast_sg_add_exclude_ports(star_mp, sg);
557 static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
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;
565 memset(&sg_ip, 0, sizeof(sg_ip));
566 sg_ip = pg->key.addr;
567 sg_ip.src = src->addr.src;
569 mp = br_mdb_ip_get(src->br, &sg_ip);
573 for (pp = &mp->ports;
574 (p = mlock_dereference(*pp, src->br)) != NULL;
576 if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
579 if (p->rt_protocol != RTPROT_KERNEL &&
580 (p->flags & MDB_PG_FLAGS_PERMANENT) &&
581 !(src->flags & BR_SGRP_F_USER_ADDED))
585 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
586 br_multicast_del_pg(mp, p, pp);
589 src->flags &= ~BR_SGRP_F_INSTALLED;
592 /* install S,G and based on src's timer enable or disable forwarding */
593 static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
595 struct net_bridge_port_group_sg_key sg_key;
596 struct net_bridge_port_group *sg;
599 br_multicast_fwd_src_add(src);
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;
606 sg = br_sg_port_find(src->br, &sg_key);
607 if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
610 old_flags = sg->flags;
611 if (timer_pending(&src->timer))
612 sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
614 sg->flags |= MDB_PG_FLAGS_BLOCKED;
616 if (old_flags != sg->flags) {
617 struct net_bridge_mdb_entry *sg_mp;
619 sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
622 br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
626 static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
628 struct net_bridge_mdb_entry *mp;
630 mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
631 WARN_ON(!hlist_unhashed(&mp->mdb_node));
634 timer_shutdown_sync(&mp->timer);
638 static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
640 struct net_bridge *br = mp->br;
642 rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
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);
649 static void br_multicast_group_expired(struct timer_list *t)
651 struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
652 struct net_bridge *br = mp->br;
654 spin_lock(&br->multicast_lock);
655 if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
656 timer_pending(&mp->timer))
659 br_multicast_host_leave(mp, true);
663 br_multicast_del_mdb_entry(mp);
665 spin_unlock(&br->multicast_lock);
668 static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
670 struct net_bridge_group_src *src;
672 src = container_of(gc, struct net_bridge_group_src, mcast_gc);
673 WARN_ON(!hlist_unhashed(&src->node));
675 timer_shutdown_sync(&src->timer);
679 void __br_multicast_del_group_src(struct net_bridge_group_src *src)
681 struct net_bridge *br = src->pg->key.port->br;
683 hlist_del_init_rcu(&src->node);
685 hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
686 queue_work(system_long_wq, &br->mcast_gc_work);
689 void br_multicast_del_group_src(struct net_bridge_group_src *src,
692 br_multicast_fwd_src_remove(src, fastleave);
693 __br_multicast_del_group_src(src);
697 br_multicast_port_ngroups_inc_one(struct net_bridge_mcast_port *pmctx,
698 struct netlink_ext_ack *extack,
701 u32 max = READ_ONCE(pmctx->mdb_max_entries);
702 u32 n = READ_ONCE(pmctx->mdb_n_entries);
704 if (max && n >= max) {
705 NL_SET_ERR_MSG_FMT_MOD(extack, "%s is already in %u groups, and mcast_max_groups=%u",
710 WRITE_ONCE(pmctx->mdb_n_entries, n + 1);
714 static void br_multicast_port_ngroups_dec_one(struct net_bridge_mcast_port *pmctx)
716 u32 n = READ_ONCE(pmctx->mdb_n_entries);
718 WARN_ON_ONCE(n == 0);
719 WRITE_ONCE(pmctx->mdb_n_entries, n - 1);
722 static int br_multicast_port_ngroups_inc(struct net_bridge_port *port,
723 const struct br_ip *group,
724 struct netlink_ext_ack *extack)
726 struct net_bridge_mcast_port *pmctx;
729 lockdep_assert_held_once(&port->br->multicast_lock);
731 /* Always count on the port context. */
732 err = br_multicast_port_ngroups_inc_one(&port->multicast_ctx, extack,
735 trace_br_mdb_full(port->dev, group);
739 /* Only count on the VLAN context if VID is given, and if snooping on
740 * that VLAN is enabled.
745 pmctx = br_multicast_port_vid_to_port_ctx(port, group->vid);
749 err = br_multicast_port_ngroups_inc_one(pmctx, extack, "Port-VLAN");
751 trace_br_mdb_full(port->dev, group);
758 br_multicast_port_ngroups_dec_one(&port->multicast_ctx);
762 static void br_multicast_port_ngroups_dec(struct net_bridge_port *port, u16 vid)
764 struct net_bridge_mcast_port *pmctx;
766 lockdep_assert_held_once(&port->br->multicast_lock);
769 pmctx = br_multicast_port_vid_to_port_ctx(port, vid);
771 br_multicast_port_ngroups_dec_one(pmctx);
773 br_multicast_port_ngroups_dec_one(&port->multicast_ctx);
776 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx)
778 return READ_ONCE(pmctx->mdb_n_entries);
781 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max)
783 WRITE_ONCE(pmctx->mdb_max_entries, max);
786 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx)
788 return READ_ONCE(pmctx->mdb_max_entries);
791 static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
793 struct net_bridge_port_group *pg;
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));
799 timer_shutdown_sync(&pg->rexmit_timer);
800 timer_shutdown_sync(&pg->timer);
804 void 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)
808 struct net_bridge *br = pg->key.port->br;
809 struct net_bridge_group_src *ent;
810 struct hlist_node *tmp;
812 rcu_assign_pointer(*pp, pg->next);
813 hlist_del_init(&pg->mglist);
814 br_multicast_eht_clean_sets(pg);
815 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
816 br_multicast_del_group_src(ent, false);
817 br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
818 if (!br_multicast_is_star_g(&mp->addr)) {
819 rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
820 br_sg_port_rht_params);
821 br_multicast_sg_del_exclude_ports(mp);
823 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
825 br_multicast_port_ngroups_dec(pg->key.port, pg->key.addr.vid);
826 hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
827 queue_work(system_long_wq, &br->mcast_gc_work);
829 if (!mp->ports && !mp->host_joined && netif_running(br->dev))
830 mod_timer(&mp->timer, jiffies);
833 static void br_multicast_find_del_pg(struct net_bridge *br,
834 struct net_bridge_port_group *pg)
836 struct net_bridge_port_group __rcu **pp;
837 struct net_bridge_mdb_entry *mp;
838 struct net_bridge_port_group *p;
840 mp = br_mdb_ip_get(br, &pg->key.addr);
844 for (pp = &mp->ports;
845 (p = mlock_dereference(*pp, br)) != NULL;
850 br_multicast_del_pg(mp, pg, pp);
857 static void br_multicast_port_group_expired(struct timer_list *t)
859 struct net_bridge_port_group *pg = from_timer(pg, t, timer);
860 struct net_bridge_group_src *src_ent;
861 struct net_bridge *br = pg->key.port->br;
862 struct hlist_node *tmp;
865 spin_lock(&br->multicast_lock);
866 if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
867 hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
870 changed = !!(pg->filter_mode == MCAST_EXCLUDE);
871 pg->filter_mode = MCAST_INCLUDE;
872 hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
873 if (!timer_pending(&src_ent->timer)) {
874 br_multicast_del_group_src(src_ent, false);
879 if (hlist_empty(&pg->src_list)) {
880 br_multicast_find_del_pg(br, pg);
881 } else if (changed) {
882 struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
884 if (changed && br_multicast_is_star_g(&pg->key.addr))
885 br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
889 br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
892 spin_unlock(&br->multicast_lock);
895 static void br_multicast_gc(struct hlist_head *head)
897 struct net_bridge_mcast_gc *gcent;
898 struct hlist_node *tmp;
900 hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
901 hlist_del_init(&gcent->gc_node);
902 gcent->destroy(gcent);
906 static void __br_multicast_query_handle_vlan(struct net_bridge_mcast *brmctx,
907 struct net_bridge_mcast_port *pmctx,
910 struct net_bridge_vlan *vlan = NULL;
912 if (pmctx && br_multicast_port_ctx_is_vlan(pmctx))
914 else if (br_multicast_ctx_is_vlan(brmctx))
917 if (vlan && !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) {
920 if (br_vlan_get_proto(brmctx->br->dev, &vlan_proto) != 0)
922 __vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan->vid);
926 static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx,
927 struct net_bridge_mcast_port *pmctx,
928 struct net_bridge_port_group *pg,
929 __be32 ip_dst, __be32 group,
930 bool with_srcs, bool over_lmqt,
931 u8 sflag, u8 *igmp_type,
934 struct net_bridge_port *p = pg ? pg->key.port : NULL;
935 struct net_bridge_group_src *ent;
936 size_t pkt_size, igmp_hdr_size;
937 unsigned long now = jiffies;
938 struct igmpv3_query *ihv3;
939 void *csum_start = NULL;
940 __sum16 *csum = NULL;
948 igmp_hdr_size = sizeof(*ih);
949 if (brmctx->multicast_igmp_version == 3) {
950 igmp_hdr_size = sizeof(*ihv3);
951 if (pg && with_srcs) {
952 lmqt = now + (brmctx->multicast_last_member_interval *
953 brmctx->multicast_last_member_count);
954 hlist_for_each_entry(ent, &pg->src_list, node) {
955 if (over_lmqt == time_after(ent->timer.expires,
957 ent->src_query_rexmit_cnt > 0)
963 igmp_hdr_size += lmqt_srcs * sizeof(__be32);
967 pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
968 if ((p && pkt_size > p->dev->mtu) ||
969 pkt_size > brmctx->br->dev->mtu)
972 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
976 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
977 skb->protocol = htons(ETH_P_IP);
979 skb_reset_mac_header(skb);
982 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
983 ip_eth_mc_map(ip_dst, eth->h_dest);
984 eth->h_proto = htons(ETH_P_IP);
985 skb_put(skb, sizeof(*eth));
987 skb_set_network_header(skb, skb->len);
989 iph->tot_len = htons(pkt_size - sizeof(*eth));
995 iph->frag_off = htons(IP_DF);
997 iph->protocol = IPPROTO_IGMP;
998 iph->saddr = br_opt_get(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
999 inet_select_addr(brmctx->br->dev, 0, RT_SCOPE_LINK) : 0;
1000 iph->daddr = ip_dst;
1001 ((u8 *)&iph[1])[0] = IPOPT_RA;
1002 ((u8 *)&iph[1])[1] = 4;
1003 ((u8 *)&iph[1])[2] = 0;
1004 ((u8 *)&iph[1])[3] = 0;
1008 skb_set_transport_header(skb, skb->len);
1009 *igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
1011 switch (brmctx->multicast_igmp_version) {
1014 ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
1015 ih->code = (group ? brmctx->multicast_last_member_interval :
1016 brmctx->multicast_query_response_interval) /
1017 (HZ / IGMP_TIMER_SCALE);
1021 csum_start = (void *)ih;
1024 ihv3 = igmpv3_query_hdr(skb);
1025 ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
1026 ihv3->code = (group ? brmctx->multicast_last_member_interval :
1027 brmctx->multicast_query_response_interval) /
1028 (HZ / IGMP_TIMER_SCALE);
1029 ihv3->group = group;
1030 ihv3->qqic = brmctx->multicast_query_interval / HZ;
1031 ihv3->nsrcs = htons(lmqt_srcs);
1033 ihv3->suppress = sflag;
1037 csum_start = (void *)ihv3;
1038 if (!pg || !with_srcs)
1042 hlist_for_each_entry(ent, &pg->src_list, node) {
1043 if (over_lmqt == time_after(ent->timer.expires,
1045 ent->src_query_rexmit_cnt > 0) {
1046 ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
1047 ent->src_query_rexmit_cnt--;
1048 if (need_rexmit && ent->src_query_rexmit_cnt)
1049 *need_rexmit = true;
1052 if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
1059 if (WARN_ON(!csum || !csum_start)) {
1064 *csum = ip_compute_csum(csum_start, igmp_hdr_size);
1065 skb_put(skb, igmp_hdr_size);
1066 __skb_pull(skb, sizeof(*eth));
1072 #if IS_ENABLED(CONFIG_IPV6)
1073 static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx,
1074 struct net_bridge_mcast_port *pmctx,
1075 struct net_bridge_port_group *pg,
1076 const struct in6_addr *ip6_dst,
1077 const struct in6_addr *group,
1078 bool with_srcs, bool over_llqt,
1079 u8 sflag, u8 *igmp_type,
1082 struct net_bridge_port *p = pg ? pg->key.port : NULL;
1083 struct net_bridge_group_src *ent;
1084 size_t pkt_size, mld_hdr_size;
1085 unsigned long now = jiffies;
1086 struct mld2_query *mld2q;
1087 void *csum_start = NULL;
1088 unsigned long interval;
1089 __sum16 *csum = NULL;
1090 struct ipv6hdr *ip6h;
1091 struct mld_msg *mldq;
1092 struct sk_buff *skb;
1098 mld_hdr_size = sizeof(*mldq);
1099 if (brmctx->multicast_mld_version == 2) {
1100 mld_hdr_size = sizeof(*mld2q);
1101 if (pg && with_srcs) {
1102 llqt = now + (brmctx->multicast_last_member_interval *
1103 brmctx->multicast_last_member_count);
1104 hlist_for_each_entry(ent, &pg->src_list, node) {
1105 if (over_llqt == time_after(ent->timer.expires,
1107 ent->src_query_rexmit_cnt > 0)
1113 mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
1117 pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
1118 if ((p && pkt_size > p->dev->mtu) ||
1119 pkt_size > brmctx->br->dev->mtu)
1122 skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
1126 __br_multicast_query_handle_vlan(brmctx, pmctx, skb);
1127 skb->protocol = htons(ETH_P_IPV6);
1129 /* Ethernet header */
1130 skb_reset_mac_header(skb);
1133 ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
1134 eth->h_proto = htons(ETH_P_IPV6);
1135 skb_put(skb, sizeof(*eth));
1137 /* IPv6 header + HbH option */
1138 skb_set_network_header(skb, skb->len);
1139 ip6h = ipv6_hdr(skb);
1141 *(__force __be32 *)ip6h = htonl(0x60000000);
1142 ip6h->payload_len = htons(8 + mld_hdr_size);
1143 ip6h->nexthdr = IPPROTO_HOPOPTS;
1144 ip6h->hop_limit = 1;
1145 ip6h->daddr = *ip6_dst;
1146 if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev,
1147 &ip6h->daddr, 0, &ip6h->saddr)) {
1149 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false);
1153 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true);
1154 ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
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) */
1163 hopopt[6] = IPV6_TLV_PAD1; /* Pad1 */
1164 hopopt[7] = IPV6_TLV_PAD1; /* Pad1 */
1166 skb_put(skb, sizeof(*ip6h) + 8);
1169 skb_set_transport_header(skb, skb->len);
1170 interval = ipv6_addr_any(group) ?
1171 brmctx->multicast_query_response_interval :
1172 brmctx->multicast_last_member_interval;
1173 *igmp_type = ICMPV6_MGM_QUERY;
1174 switch (brmctx->multicast_mld_version) {
1176 mldq = (struct mld_msg *)icmp6_hdr(skb);
1177 mldq->mld_type = ICMPV6_MGM_QUERY;
1179 mldq->mld_cksum = 0;
1180 mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
1181 mldq->mld_reserved = 0;
1182 mldq->mld_mca = *group;
1183 csum = &mldq->mld_cksum;
1184 csum_start = (void *)mldq;
1187 mld2q = (struct mld2_query *)icmp6_hdr(skb);
1188 mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
1189 mld2q->mld2q_type = ICMPV6_MGM_QUERY;
1190 mld2q->mld2q_code = 0;
1191 mld2q->mld2q_cksum = 0;
1192 mld2q->mld2q_resv1 = 0;
1193 mld2q->mld2q_resv2 = 0;
1194 mld2q->mld2q_suppress = sflag;
1195 mld2q->mld2q_qrv = 2;
1196 mld2q->mld2q_nsrcs = htons(llqt_srcs);
1197 mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ;
1198 mld2q->mld2q_mca = *group;
1199 csum = &mld2q->mld2q_cksum;
1200 csum_start = (void *)mld2q;
1201 if (!pg || !with_srcs)
1205 hlist_for_each_entry(ent, &pg->src_list, node) {
1206 if (over_llqt == time_after(ent->timer.expires,
1208 ent->src_query_rexmit_cnt > 0) {
1209 mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
1210 ent->src_query_rexmit_cnt--;
1211 if (need_rexmit && ent->src_query_rexmit_cnt)
1212 *need_rexmit = true;
1215 if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
1222 if (WARN_ON(!csum || !csum_start)) {
1227 *csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
1229 csum_partial(csum_start, mld_hdr_size, 0));
1230 skb_put(skb, mld_hdr_size);
1231 __skb_pull(skb, sizeof(*eth));
1238 static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx,
1239 struct net_bridge_mcast_port *pmctx,
1240 struct net_bridge_port_group *pg,
1241 struct br_ip *ip_dst,
1242 struct br_ip *group,
1243 bool with_srcs, bool over_lmqt,
1244 u8 sflag, u8 *igmp_type,
1249 switch (group->proto) {
1250 case htons(ETH_P_IP):
1251 ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
1252 return br_ip4_multicast_alloc_query(brmctx, pmctx, pg,
1253 ip4_dst, group->dst.ip4,
1254 with_srcs, over_lmqt,
1257 #if IS_ENABLED(CONFIG_IPV6)
1258 case htons(ETH_P_IPV6): {
1259 struct in6_addr ip6_dst;
1262 ip6_dst = ip_dst->dst.ip6;
1264 ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
1267 return br_ip6_multicast_alloc_query(brmctx, pmctx, pg,
1268 &ip6_dst, &group->dst.ip6,
1269 with_srcs, over_lmqt,
1278 struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
1279 struct br_ip *group)
1281 struct net_bridge_mdb_entry *mp;
1284 mp = br_mdb_ip_get(br, group);
1288 if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
1289 trace_br_mdb_full(br->dev, group);
1290 br_mc_disabled_update(br->dev, false, NULL);
1291 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
1292 return ERR_PTR(-E2BIG);
1295 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1297 return ERR_PTR(-ENOMEM);
1301 mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
1302 timer_setup(&mp->timer, br_multicast_group_expired, 0);
1303 err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
1309 hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
1315 static void br_multicast_group_src_expired(struct timer_list *t)
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;
1321 spin_lock(&br->multicast_lock);
1322 if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
1323 timer_pending(&src->timer))
1327 if (pg->filter_mode == MCAST_INCLUDE) {
1328 br_multicast_del_group_src(src, false);
1329 if (!hlist_empty(&pg->src_list))
1331 br_multicast_find_del_pg(br, pg);
1333 br_multicast_fwd_src_handle(src);
1337 spin_unlock(&br->multicast_lock);
1340 struct net_bridge_group_src *
1341 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
1343 struct net_bridge_group_src *ent;
1345 switch (ip->proto) {
1346 case htons(ETH_P_IP):
1347 hlist_for_each_entry(ent, &pg->src_list, node)
1348 if (ip->src.ip4 == ent->addr.src.ip4)
1351 #if IS_ENABLED(CONFIG_IPV6)
1352 case htons(ETH_P_IPV6):
1353 hlist_for_each_entry(ent, &pg->src_list, node)
1354 if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
1363 struct net_bridge_group_src *
1364 br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
1366 struct net_bridge_group_src *grp_src;
1368 if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
1371 switch (src_ip->proto) {
1372 case htons(ETH_P_IP):
1373 if (ipv4_is_zeronet(src_ip->src.ip4) ||
1374 ipv4_is_multicast(src_ip->src.ip4))
1377 #if IS_ENABLED(CONFIG_IPV6)
1378 case htons(ETH_P_IPV6):
1379 if (ipv6_addr_any(&src_ip->src.ip6) ||
1380 ipv6_addr_is_multicast(&src_ip->src.ip6))
1386 grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
1387 if (unlikely(!grp_src))
1391 grp_src->br = pg->key.port->br;
1392 grp_src->addr = *src_ip;
1393 grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
1394 timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
1396 hlist_add_head_rcu(&grp_src->node, &pg->src_list);
1402 struct net_bridge_port_group *br_multicast_new_port_group(
1403 struct net_bridge_port *port,
1404 const struct br_ip *group,
1405 struct net_bridge_port_group __rcu *next,
1406 unsigned char flags,
1407 const unsigned char *src,
1410 struct netlink_ext_ack *extack)
1412 struct net_bridge_port_group *p;
1415 err = br_multicast_port_ngroups_inc(port, group, extack);
1419 p = kzalloc(sizeof(*p), GFP_ATOMIC);
1421 NL_SET_ERR_MSG_MOD(extack, "Couldn't allocate new port group");
1425 p->key.addr = *group;
1428 p->filter_mode = filter_mode;
1429 p->rt_protocol = rt_protocol;
1430 p->eht_host_tree = RB_ROOT;
1431 p->eht_set_tree = RB_ROOT;
1432 p->mcast_gc.destroy = br_multicast_destroy_port_group;
1433 INIT_HLIST_HEAD(&p->src_list);
1435 if (!br_multicast_is_star_g(group) &&
1436 rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
1437 br_sg_port_rht_params)) {
1438 NL_SET_ERR_MSG_MOD(extack, "Couldn't insert new port group");
1442 rcu_assign_pointer(p->next, next);
1443 timer_setup(&p->timer, br_multicast_port_group_expired, 0);
1444 timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
1445 hlist_add_head(&p->mglist, &port->mglist);
1448 memcpy(p->eth_addr, src, ETH_ALEN);
1450 eth_broadcast_addr(p->eth_addr);
1457 br_multicast_port_ngroups_dec(port, group->vid);
1461 void br_multicast_del_port_group(struct net_bridge_port_group *p)
1463 struct net_bridge_port *port = p->key.port;
1464 __u16 vid = p->key.addr.vid;
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);
1471 br_multicast_port_ngroups_dec(port, vid);
1474 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1475 struct net_bridge_mdb_entry *mp, bool notify)
1477 if (!mp->host_joined) {
1478 mp->host_joined = true;
1479 if (br_multicast_is_star_g(&mp->addr))
1480 br_multicast_star_g_host_state(mp);
1482 br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
1485 if (br_group_is_l2(&mp->addr))
1488 mod_timer(&mp->timer, jiffies + brmctx->multicast_membership_interval);
1491 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
1493 if (!mp->host_joined)
1496 mp->host_joined = false;
1497 if (br_multicast_is_star_g(&mp->addr))
1498 br_multicast_star_g_host_state(mp);
1500 br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
1503 static struct net_bridge_port_group *
1504 __br_multicast_add_group(struct net_bridge_mcast *brmctx,
1505 struct net_bridge_mcast_port *pmctx,
1506 struct br_ip *group,
1507 const unsigned char *src,
1512 struct net_bridge_port_group __rcu **pp;
1513 struct net_bridge_port_group *p = NULL;
1514 struct net_bridge_mdb_entry *mp;
1515 unsigned long now = jiffies;
1517 if (!br_multicast_ctx_should_use(brmctx, pmctx))
1520 mp = br_multicast_new_group(brmctx->br, group);
1522 return ERR_CAST(mp);
1525 br_multicast_host_join(brmctx, mp, true);
1529 for (pp = &mp->ports;
1530 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
1532 if (br_port_group_equal(p, pmctx->port, src))
1534 if ((unsigned long)p->key.port < (unsigned long)pmctx->port)
1538 p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src,
1539 filter_mode, RTPROT_KERNEL, NULL);
1541 p = ERR_PTR(-ENOMEM);
1544 rcu_assign_pointer(*pp, p);
1546 p->flags |= MDB_PG_FLAGS_BLOCKED;
1547 br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB);
1551 mod_timer(&p->timer,
1552 now + brmctx->multicast_membership_interval);
1558 static int br_multicast_add_group(struct net_bridge_mcast *brmctx,
1559 struct net_bridge_mcast_port *pmctx,
1560 struct br_ip *group,
1561 const unsigned char *src,
1565 struct net_bridge_port_group *pg;
1568 spin_lock(&brmctx->br->multicast_lock);
1569 pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode,
1570 igmpv2_mldv1, false);
1571 /* NULL is considered valid for host joined groups */
1572 err = PTR_ERR_OR_ZERO(pg);
1573 spin_unlock(&brmctx->br->multicast_lock);
1578 static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx,
1579 struct net_bridge_mcast_port *pmctx,
1582 const unsigned char *src,
1585 struct br_ip br_group;
1588 if (ipv4_is_local_multicast(group))
1591 memset(&br_group, 0, sizeof(br_group));
1592 br_group.dst.ip4 = group;
1593 br_group.proto = htons(ETH_P_IP);
1595 filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1597 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1598 filter_mode, igmpv2);
1601 #if IS_ENABLED(CONFIG_IPV6)
1602 static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx,
1603 struct net_bridge_mcast_port *pmctx,
1604 const struct in6_addr *group,
1606 const unsigned char *src,
1609 struct br_ip br_group;
1612 if (ipv6_addr_is_ll_all_nodes(group))
1615 memset(&br_group, 0, sizeof(br_group));
1616 br_group.dst.ip6 = *group;
1617 br_group.proto = htons(ETH_P_IPV6);
1619 filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
1621 return br_multicast_add_group(brmctx, pmctx, &br_group, src,
1622 filter_mode, mldv1);
1626 static bool br_multicast_rport_del(struct hlist_node *rlist)
1628 if (hlist_unhashed(rlist))
1631 hlist_del_init_rcu(rlist);
1635 static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
1637 return br_multicast_rport_del(&pmctx->ip4_rlist);
1640 static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
1642 #if IS_ENABLED(CONFIG_IPV6)
1643 return br_multicast_rport_del(&pmctx->ip6_rlist);
1649 static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx,
1650 struct timer_list *t,
1651 struct hlist_node *rlist)
1653 struct net_bridge *br = pmctx->port->br;
1656 spin_lock(&br->multicast_lock);
1657 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
1658 pmctx->multicast_router == MDB_RTR_TYPE_PERM ||
1662 del = br_multicast_rport_del(rlist);
1663 br_multicast_rport_del_notify(pmctx, del);
1665 spin_unlock(&br->multicast_lock);
1668 static void br_ip4_multicast_router_expired(struct timer_list *t)
1670 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1671 ip4_mc_router_timer);
1673 br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist);
1676 #if IS_ENABLED(CONFIG_IPV6)
1677 static void br_ip6_multicast_router_expired(struct timer_list *t)
1679 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1680 ip6_mc_router_timer);
1682 br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist);
1686 static void br_mc_router_state_change(struct net_bridge *p,
1689 struct switchdev_attr attr = {
1691 .id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
1692 .flags = SWITCHDEV_F_DEFER,
1693 .u.mrouter = is_mc_router,
1696 switchdev_port_attr_set(p->dev, &attr, NULL);
1699 static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx,
1700 struct timer_list *timer)
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))
1709 br_mc_router_state_change(brmctx->br, false);
1711 spin_unlock(&brmctx->br->multicast_lock);
1714 static void br_ip4_multicast_local_router_expired(struct timer_list *t)
1716 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1717 ip4_mc_router_timer);
1719 br_multicast_local_router_expired(brmctx, t);
1722 #if IS_ENABLED(CONFIG_IPV6)
1723 static void br_ip6_multicast_local_router_expired(struct timer_list *t)
1725 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1726 ip6_mc_router_timer);
1728 br_multicast_local_router_expired(brmctx, t);
1732 static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx,
1733 struct bridge_mcast_own_query *query)
1735 spin_lock(&brmctx->br->multicast_lock);
1736 if (!netif_running(brmctx->br->dev) ||
1737 br_multicast_ctx_vlan_global_disabled(brmctx) ||
1738 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
1741 br_multicast_start_querier(brmctx, query);
1744 spin_unlock(&brmctx->br->multicast_lock);
1747 static void br_ip4_multicast_querier_expired(struct timer_list *t)
1749 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1750 ip4_other_query.timer);
1752 br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query);
1755 #if IS_ENABLED(CONFIG_IPV6)
1756 static void br_ip6_multicast_querier_expired(struct timer_list *t)
1758 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
1759 ip6_other_query.timer);
1761 br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query);
1765 static void br_multicast_query_delay_expired(struct timer_list *t)
1769 static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx,
1771 struct sk_buff *skb)
1773 if (ip->proto == htons(ETH_P_IP))
1774 brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
1775 #if IS_ENABLED(CONFIG_IPV6)
1777 brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
1781 static void __br_multicast_send_query(struct net_bridge_mcast *brmctx,
1782 struct net_bridge_mcast_port *pmctx,
1783 struct net_bridge_port_group *pg,
1784 struct br_ip *ip_dst,
1785 struct br_ip *group,
1790 bool over_lmqt = !!sflag;
1791 struct sk_buff *skb;
1794 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1795 !br_multicast_ctx_matches_vlan_snooping(brmctx))
1799 skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group,
1800 with_srcs, over_lmqt, sflag, &igmp_type,
1806 skb->dev = pmctx->port->dev;
1807 br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type,
1809 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
1810 dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev,
1811 br_dev_queue_push_xmit);
1813 if (over_lmqt && with_srcs && sflag) {
1815 goto again_under_lmqt;
1818 br_multicast_select_own_querier(brmctx, group, skb);
1819 br_multicast_count(brmctx->br, NULL, skb, igmp_type,
1825 static void br_multicast_read_querier(const struct bridge_mcast_querier *querier,
1826 struct bridge_mcast_querier *dest)
1830 memset(dest, 0, sizeof(*dest));
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));
1838 static void br_multicast_update_querier(struct net_bridge_mcast *brmctx,
1839 struct bridge_mcast_querier *querier,
1841 struct br_ip *saddr)
1843 write_seqcount_begin(&querier->seq);
1844 querier->port_ifidx = ifindex;
1845 memcpy(&querier->addr, saddr, sizeof(*saddr));
1846 write_seqcount_end(&querier->seq);
1849 static void br_multicast_send_query(struct net_bridge_mcast *brmctx,
1850 struct net_bridge_mcast_port *pmctx,
1851 struct bridge_mcast_own_query *own_query)
1853 struct bridge_mcast_other_query *other_query = NULL;
1854 struct bridge_mcast_querier *querier;
1855 struct br_ip br_group;
1858 if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
1859 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
1860 !brmctx->multicast_querier)
1863 memset(&br_group.dst, 0, sizeof(br_group.dst));
1865 if (pmctx ? (own_query == &pmctx->ip4_own_query) :
1866 (own_query == &brmctx->ip4_own_query)) {
1867 querier = &brmctx->ip4_querier;
1868 other_query = &brmctx->ip4_other_query;
1869 br_group.proto = htons(ETH_P_IP);
1870 #if IS_ENABLED(CONFIG_IPV6)
1872 querier = &brmctx->ip6_querier;
1873 other_query = &brmctx->ip6_other_query;
1874 br_group.proto = htons(ETH_P_IPV6);
1878 if (!other_query || timer_pending(&other_query->timer))
1881 /* we're about to select ourselves as querier */
1882 if (!pmctx && querier->port_ifidx) {
1883 struct br_ip zeroip = {};
1885 br_multicast_update_querier(brmctx, querier, 0, &zeroip);
1888 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false,
1892 time += own_query->startup_sent < brmctx->multicast_startup_query_count ?
1893 brmctx->multicast_startup_query_interval :
1894 brmctx->multicast_query_interval;
1895 mod_timer(&own_query->timer, time);
1899 br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx,
1900 struct bridge_mcast_own_query *query)
1902 struct net_bridge *br = pmctx->port->br;
1903 struct net_bridge_mcast *brmctx;
1905 spin_lock(&br->multicast_lock);
1906 if (br_multicast_port_ctx_state_stopped(pmctx))
1909 brmctx = br_multicast_port_ctx_get_global(pmctx);
1910 if (query->startup_sent < brmctx->multicast_startup_query_count)
1911 query->startup_sent++;
1913 br_multicast_send_query(brmctx, pmctx, query);
1916 spin_unlock(&br->multicast_lock);
1919 static void br_ip4_multicast_port_query_expired(struct timer_list *t)
1921 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1922 ip4_own_query.timer);
1924 br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query);
1927 #if IS_ENABLED(CONFIG_IPV6)
1928 static void br_ip6_multicast_port_query_expired(struct timer_list *t)
1930 struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
1931 ip6_own_query.timer);
1933 br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query);
1937 static void br_multicast_port_group_rexmit(struct timer_list *t)
1939 struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
1940 struct bridge_mcast_other_query *other_query = NULL;
1941 struct net_bridge *br = pg->key.port->br;
1942 struct net_bridge_mcast_port *pmctx;
1943 struct net_bridge_mcast *brmctx;
1944 bool need_rexmit = false;
1946 spin_lock(&br->multicast_lock);
1947 if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
1948 !br_opt_get(br, BROPT_MULTICAST_ENABLED))
1951 pmctx = br_multicast_pg_to_port_ctx(pg);
1954 brmctx = br_multicast_port_ctx_get_global(pmctx);
1955 if (!brmctx->multicast_querier)
1958 if (pg->key.addr.proto == htons(ETH_P_IP))
1959 other_query = &brmctx->ip4_other_query;
1960 #if IS_ENABLED(CONFIG_IPV6)
1962 other_query = &brmctx->ip6_other_query;
1965 if (!other_query || timer_pending(&other_query->timer))
1968 if (pg->grp_query_rexmit_cnt) {
1969 pg->grp_query_rexmit_cnt--;
1970 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
1971 &pg->key.addr, false, 1, NULL);
1973 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
1974 &pg->key.addr, true, 0, &need_rexmit);
1976 if (pg->grp_query_rexmit_cnt || need_rexmit)
1977 mod_timer(&pg->rexmit_timer, jiffies +
1978 brmctx->multicast_last_member_interval);
1980 spin_unlock(&br->multicast_lock);
1983 static int br_mc_disabled_update(struct net_device *dev, bool value,
1984 struct netlink_ext_ack *extack)
1986 struct switchdev_attr attr = {
1988 .id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
1989 .flags = SWITCHDEV_F_DEFER,
1990 .u.mc_disabled = !value,
1993 return switchdev_port_attr_set(dev, &attr, extack);
1996 void br_multicast_port_ctx_init(struct net_bridge_port *port,
1997 struct net_bridge_vlan *vlan,
1998 struct net_bridge_mcast_port *pmctx)
2002 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
2003 timer_setup(&pmctx->ip4_mc_router_timer,
2004 br_ip4_multicast_router_expired, 0);
2005 timer_setup(&pmctx->ip4_own_query.timer,
2006 br_ip4_multicast_port_query_expired, 0);
2007 #if IS_ENABLED(CONFIG_IPV6)
2008 timer_setup(&pmctx->ip6_mc_router_timer,
2009 br_ip6_multicast_router_expired, 0);
2010 timer_setup(&pmctx->ip6_own_query.timer,
2011 br_ip6_multicast_port_query_expired, 0);
2015 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
2017 #if IS_ENABLED(CONFIG_IPV6)
2018 del_timer_sync(&pmctx->ip6_mc_router_timer);
2020 del_timer_sync(&pmctx->ip4_mc_router_timer);
2023 int br_multicast_add_port(struct net_bridge_port *port)
2027 port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
2028 br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx);
2030 err = br_mc_disabled_update(port->dev,
2031 br_opt_get(port->br,
2032 BROPT_MULTICAST_ENABLED),
2034 if (err && err != -EOPNOTSUPP)
2037 port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
2038 if (!port->mcast_stats)
2044 void br_multicast_del_port(struct net_bridge_port *port)
2046 struct net_bridge *br = port->br;
2047 struct net_bridge_port_group *pg;
2048 HLIST_HEAD(deleted_head);
2049 struct hlist_node *n;
2051 /* Take care of the remaining groups, only perm ones should be left */
2052 spin_lock_bh(&br->multicast_lock);
2053 hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
2054 br_multicast_find_del_pg(br, pg);
2055 hlist_move_list(&br->mcast_gc_list, &deleted_head);
2056 spin_unlock_bh(&br->multicast_lock);
2057 br_multicast_gc(&deleted_head);
2058 br_multicast_port_ctx_deinit(&port->multicast_ctx);
2059 free_percpu(port->mcast_stats);
2062 static void br_multicast_enable(struct bridge_mcast_own_query *query)
2064 query->startup_sent = 0;
2066 if (try_to_del_timer_sync(&query->timer) >= 0 ||
2067 del_timer(&query->timer))
2068 mod_timer(&query->timer, jiffies);
2071 static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx)
2073 struct net_bridge *br = pmctx->port->br;
2074 struct net_bridge_mcast *brmctx;
2076 brmctx = br_multicast_port_ctx_get_global(pmctx);
2077 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
2078 !netif_running(br->dev))
2081 br_multicast_enable(&pmctx->ip4_own_query);
2082 #if IS_ENABLED(CONFIG_IPV6)
2083 br_multicast_enable(&pmctx->ip6_own_query);
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);
2090 if (br_multicast_port_ctx_is_vlan(pmctx)) {
2091 struct net_bridge_port_group *pg;
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.
2102 hlist_for_each_entry(pg, &pmctx->port->mglist, mglist) {
2103 if (pg->key.addr.vid == pmctx->vlan->vid)
2106 WRITE_ONCE(pmctx->mdb_n_entries, n);
2110 void br_multicast_enable_port(struct net_bridge_port *port)
2112 struct net_bridge *br = port->br;
2114 spin_lock_bh(&br->multicast_lock);
2115 __br_multicast_enable_port_ctx(&port->multicast_ctx);
2116 spin_unlock_bh(&br->multicast_lock);
2119 static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx)
2121 struct net_bridge_port_group *pg;
2122 struct hlist_node *n;
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);
2131 del |= br_ip4_multicast_rport_del(pmctx);
2132 del_timer(&pmctx->ip4_mc_router_timer);
2133 del_timer(&pmctx->ip4_own_query.timer);
2134 del |= br_ip6_multicast_rport_del(pmctx);
2135 #if IS_ENABLED(CONFIG_IPV6)
2136 del_timer(&pmctx->ip6_mc_router_timer);
2137 del_timer(&pmctx->ip6_own_query.timer);
2139 br_multicast_rport_del_notify(pmctx, del);
2142 void br_multicast_disable_port(struct net_bridge_port *port)
2144 spin_lock_bh(&port->br->multicast_lock);
2145 __br_multicast_disable_port_ctx(&port->multicast_ctx);
2146 spin_unlock_bh(&port->br->multicast_lock);
2149 static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
2151 struct net_bridge_group_src *ent;
2152 struct hlist_node *tmp;
2155 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
2156 if (ent->flags & BR_SGRP_F_DELETE) {
2157 br_multicast_del_group_src(ent, false);
2164 static void __grp_src_mod_timer(struct net_bridge_group_src *src,
2165 unsigned long expires)
2167 mod_timer(&src->timer, expires);
2168 br_multicast_fwd_src_handle(src);
2171 static 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)
2175 struct bridge_mcast_other_query *other_query = NULL;
2176 u32 lmqc = brmctx->multicast_last_member_count;
2177 unsigned long lmqt, lmi, now = jiffies;
2178 struct net_bridge_group_src *ent;
2180 if (!netif_running(brmctx->br->dev) ||
2181 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
2184 if (pg->key.addr.proto == htons(ETH_P_IP))
2185 other_query = &brmctx->ip4_other_query;
2186 #if IS_ENABLED(CONFIG_IPV6)
2188 other_query = &brmctx->ip6_other_query;
2191 lmqt = now + br_multicast_lmqt(brmctx);
2192 hlist_for_each_entry(ent, &pg->src_list, node) {
2193 if (ent->flags & BR_SGRP_F_SEND) {
2194 ent->flags &= ~BR_SGRP_F_SEND;
2195 if (ent->timer.expires > lmqt) {
2196 if (brmctx->multicast_querier &&
2198 !timer_pending(&other_query->timer))
2199 ent->src_query_rexmit_cnt = lmqc;
2200 __grp_src_mod_timer(ent, lmqt);
2205 if (!brmctx->multicast_querier ||
2206 !other_query || timer_pending(&other_query->timer))
2209 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
2210 &pg->key.addr, true, 1, NULL);
2212 lmi = now + brmctx->multicast_last_member_interval;
2213 if (!timer_pending(&pg->rexmit_timer) ||
2214 time_after(pg->rexmit_timer.expires, lmi))
2215 mod_timer(&pg->rexmit_timer, lmi);
2218 static 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)
2222 struct bridge_mcast_other_query *other_query = NULL;
2223 unsigned long now = jiffies, lmi;
2225 if (!netif_running(brmctx->br->dev) ||
2226 !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
2229 if (pg->key.addr.proto == htons(ETH_P_IP))
2230 other_query = &brmctx->ip4_other_query;
2231 #if IS_ENABLED(CONFIG_IPV6)
2233 other_query = &brmctx->ip6_other_query;
2236 if (brmctx->multicast_querier &&
2237 other_query && !timer_pending(&other_query->timer)) {
2238 lmi = now + brmctx->multicast_last_member_interval;
2239 pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1;
2240 __br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
2241 &pg->key.addr, false, 0, NULL);
2242 if (!timer_pending(&pg->rexmit_timer) ||
2243 time_after(pg->rexmit_timer.expires, lmi))
2244 mod_timer(&pg->rexmit_timer, lmi);
2247 if (pg->filter_mode == MCAST_EXCLUDE &&
2248 (!timer_pending(&pg->timer) ||
2249 time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx))))
2250 mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx));
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
2258 static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx,
2259 struct net_bridge_port_group *pg, void *h_addr,
2260 void *srcs, u32 nsrcs, size_t addr_size,
2263 struct net_bridge_group_src *ent;
2264 unsigned long now = jiffies;
2265 bool changed = false;
2266 struct br_ip src_ip;
2269 memset(&src_ip, 0, sizeof(src_ip));
2270 src_ip.proto = pg->key.addr.proto;
2271 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2272 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2273 ent = br_multicast_find_group_src(pg, &src_ip);
2275 ent = br_multicast_new_group_src(pg, &src_ip);
2281 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2284 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2291 /* State Msg type New state Actions
2292 * INCLUDE (A) IS_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2296 static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx,
2297 struct net_bridge_port_group *pg, void *h_addr,
2298 void *srcs, u32 nsrcs, size_t addr_size,
2301 struct net_bridge_group_src *ent;
2302 struct br_ip src_ip;
2305 hlist_for_each_entry(ent, &pg->src_list, node)
2306 ent->flags |= BR_SGRP_F_DELETE;
2308 memset(&src_ip, 0, sizeof(src_ip));
2309 src_ip.proto = pg->key.addr.proto;
2310 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2311 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2312 ent = br_multicast_find_group_src(pg, &src_ip);
2314 ent->flags &= ~BR_SGRP_F_DELETE;
2316 ent = br_multicast_new_group_src(pg, &src_ip);
2318 br_multicast_fwd_src_handle(ent);
2321 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2324 __grp_src_delete_marked(pg);
2327 /* State Msg type New state Actions
2328 * EXCLUDE (X,Y) IS_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=GMI
2333 static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx,
2334 struct net_bridge_port_group *pg, void *h_addr,
2335 void *srcs, u32 nsrcs, size_t addr_size,
2338 struct net_bridge_group_src *ent;
2339 unsigned long now = jiffies;
2340 bool changed = false;
2341 struct br_ip src_ip;
2344 hlist_for_each_entry(ent, &pg->src_list, node)
2345 ent->flags |= BR_SGRP_F_DELETE;
2347 memset(&src_ip, 0, sizeof(src_ip));
2348 src_ip.proto = pg->key.addr.proto;
2349 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2350 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2351 ent = br_multicast_find_group_src(pg, &src_ip);
2353 ent->flags &= ~BR_SGRP_F_DELETE;
2355 ent = br_multicast_new_group_src(pg, &src_ip);
2357 __grp_src_mod_timer(ent,
2358 now + br_multicast_gmi(brmctx));
2364 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2368 if (__grp_src_delete_marked(pg))
2374 static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx,
2375 struct net_bridge_port_group *pg, void *h_addr,
2376 void *srcs, u32 nsrcs, size_t addr_size,
2379 bool changed = false;
2381 switch (pg->filter_mode) {
2383 __grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2385 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2389 changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs,
2390 addr_size, grec_type);
2394 pg->filter_mode = MCAST_EXCLUDE;
2395 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
2400 /* State Msg type New state Actions
2401 * INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
2404 static bool __grp_src_toin_incl(struct net_bridge_mcast *brmctx,
2405 struct net_bridge_mcast_port *pmctx,
2406 struct net_bridge_port_group *pg, void *h_addr,
2407 void *srcs, u32 nsrcs, size_t addr_size,
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;
2416 hlist_for_each_entry(ent, &pg->src_list, node)
2417 ent->flags |= BR_SGRP_F_SEND;
2419 memset(&src_ip, 0, sizeof(src_ip));
2420 src_ip.proto = pg->key.addr.proto;
2421 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2422 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2423 ent = br_multicast_find_group_src(pg, &src_ip);
2425 ent->flags &= ~BR_SGRP_F_SEND;
2428 ent = br_multicast_new_group_src(pg, &src_ip);
2433 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2436 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2441 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2446 /* State Msg type New state Actions
2447 * EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
2451 static bool __grp_src_toin_excl(struct net_bridge_mcast *brmctx,
2452 struct net_bridge_mcast_port *pmctx,
2453 struct net_bridge_port_group *pg, void *h_addr,
2454 void *srcs, u32 nsrcs, size_t addr_size,
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;
2463 hlist_for_each_entry(ent, &pg->src_list, node)
2464 if (timer_pending(&ent->timer))
2465 ent->flags |= BR_SGRP_F_SEND;
2467 memset(&src_ip, 0, sizeof(src_ip));
2468 src_ip.proto = pg->key.addr.proto;
2469 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2470 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2471 ent = br_multicast_find_group_src(pg, &src_ip);
2473 if (timer_pending(&ent->timer)) {
2474 ent->flags &= ~BR_SGRP_F_SEND;
2478 ent = br_multicast_new_group_src(pg, &src_ip);
2483 __grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
2486 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2491 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2493 __grp_send_query_and_rexmit(brmctx, pmctx, pg);
2498 static bool br_multicast_toin(struct net_bridge_mcast *brmctx,
2499 struct net_bridge_mcast_port *pmctx,
2500 struct net_bridge_port_group *pg, void *h_addr,
2501 void *srcs, u32 nsrcs, size_t addr_size,
2504 bool changed = false;
2506 switch (pg->filter_mode) {
2508 changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs,
2509 nsrcs, addr_size, grec_type);
2512 changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs,
2513 nsrcs, addr_size, grec_type);
2517 if (br_multicast_eht_should_del_pg(pg)) {
2518 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2519 br_multicast_find_del_pg(pg->key.port->br, pg);
2520 /* a notification has already been sent and we shouldn't
2521 * access pg after the delete so we have to return false
2529 /* State Msg type New state Actions
2530 * INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
2535 static void __grp_src_toex_incl(struct net_bridge_mcast *brmctx,
2536 struct net_bridge_mcast_port *pmctx,
2537 struct net_bridge_port_group *pg, void *h_addr,
2538 void *srcs, u32 nsrcs, size_t addr_size,
2541 struct net_bridge_group_src *ent;
2542 u32 src_idx, to_send = 0;
2543 struct br_ip src_ip;
2545 hlist_for_each_entry(ent, &pg->src_list, node)
2546 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2548 memset(&src_ip, 0, sizeof(src_ip));
2549 src_ip.proto = pg->key.addr.proto;
2550 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2551 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2552 ent = br_multicast_find_group_src(pg, &src_ip);
2554 ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
2558 ent = br_multicast_new_group_src(pg, &src_ip);
2561 br_multicast_fwd_src_handle(ent);
2564 br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2567 __grp_src_delete_marked(pg);
2569 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2572 /* State Msg type New state Actions
2573 * EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
2579 static bool __grp_src_toex_excl(struct net_bridge_mcast *brmctx,
2580 struct net_bridge_mcast_port *pmctx,
2581 struct net_bridge_port_group *pg, void *h_addr,
2582 void *srcs, u32 nsrcs, size_t addr_size,
2585 struct net_bridge_group_src *ent;
2586 u32 src_idx, to_send = 0;
2587 bool changed = false;
2588 struct br_ip src_ip;
2590 hlist_for_each_entry(ent, &pg->src_list, node)
2591 ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
2593 memset(&src_ip, 0, sizeof(src_ip));
2594 src_ip.proto = pg->key.addr.proto;
2595 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2596 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2597 ent = br_multicast_find_group_src(pg, &src_ip);
2599 ent->flags &= ~BR_SGRP_F_DELETE;
2601 ent = br_multicast_new_group_src(pg, &src_ip);
2603 __grp_src_mod_timer(ent, pg->timer.expires);
2607 if (ent && timer_pending(&ent->timer)) {
2608 ent->flags |= BR_SGRP_F_SEND;
2613 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2617 if (__grp_src_delete_marked(pg))
2620 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2625 static bool br_multicast_toex(struct net_bridge_mcast *brmctx,
2626 struct net_bridge_mcast_port *pmctx,
2627 struct net_bridge_port_group *pg, void *h_addr,
2628 void *srcs, u32 nsrcs, size_t addr_size,
2631 bool changed = false;
2633 switch (pg->filter_mode) {
2635 __grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs,
2636 addr_size, grec_type);
2637 br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
2641 changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs,
2642 nsrcs, addr_size, grec_type);
2646 pg->filter_mode = MCAST_EXCLUDE;
2647 mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
2652 /* State Msg type New state Actions
2653 * INCLUDE (A) BLOCK (B) INCLUDE (A) Send Q(G,A*B)
2655 static bool __grp_src_block_incl(struct net_bridge_mcast *brmctx,
2656 struct net_bridge_mcast_port *pmctx,
2657 struct net_bridge_port_group *pg, void *h_addr,
2658 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2660 struct net_bridge_group_src *ent;
2661 u32 src_idx, to_send = 0;
2662 bool changed = false;
2663 struct br_ip src_ip;
2665 hlist_for_each_entry(ent, &pg->src_list, node)
2666 ent->flags &= ~BR_SGRP_F_SEND;
2668 memset(&src_ip, 0, sizeof(src_ip));
2669 src_ip.proto = pg->key.addr.proto;
2670 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2671 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2672 ent = br_multicast_find_group_src(pg, &src_ip);
2674 ent->flags |= BR_SGRP_F_SEND;
2679 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2684 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2689 /* State Msg type New state Actions
2690 * EXCLUDE (X,Y) BLOCK (A) EXCLUDE (X+(A-Y),Y) (A-X-Y)=Group Timer
2693 static bool __grp_src_block_excl(struct net_bridge_mcast *brmctx,
2694 struct net_bridge_mcast_port *pmctx,
2695 struct net_bridge_port_group *pg, void *h_addr,
2696 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2698 struct net_bridge_group_src *ent;
2699 u32 src_idx, to_send = 0;
2700 bool changed = false;
2701 struct br_ip src_ip;
2703 hlist_for_each_entry(ent, &pg->src_list, node)
2704 ent->flags &= ~BR_SGRP_F_SEND;
2706 memset(&src_ip, 0, sizeof(src_ip));
2707 src_ip.proto = pg->key.addr.proto;
2708 for (src_idx = 0; src_idx < nsrcs; src_idx++) {
2709 memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
2710 ent = br_multicast_find_group_src(pg, &src_ip);
2712 ent = br_multicast_new_group_src(pg, &src_ip);
2714 __grp_src_mod_timer(ent, pg->timer.expires);
2718 if (ent && timer_pending(&ent->timer)) {
2719 ent->flags |= BR_SGRP_F_SEND;
2724 if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
2729 __grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
2734 static bool br_multicast_block(struct net_bridge_mcast *brmctx,
2735 struct net_bridge_mcast_port *pmctx,
2736 struct net_bridge_port_group *pg, void *h_addr,
2737 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
2739 bool changed = false;
2741 switch (pg->filter_mode) {
2743 changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs,
2744 nsrcs, addr_size, grec_type);
2747 changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs,
2748 nsrcs, addr_size, grec_type);
2752 if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
2753 br_multicast_eht_should_del_pg(pg)) {
2754 if (br_multicast_eht_should_del_pg(pg))
2755 pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
2756 br_multicast_find_del_pg(pg->key.port->br, pg);
2757 /* a notification has already been sent and we shouldn't
2758 * access pg after the delete so we have to return false
2766 static struct net_bridge_port_group *
2767 br_multicast_find_port(struct net_bridge_mdb_entry *mp,
2768 struct net_bridge_port *p,
2769 const unsigned char *src)
2771 struct net_bridge *br __maybe_unused = mp->br;
2772 struct net_bridge_port_group *pg;
2774 for (pg = mlock_dereference(mp->ports, br);
2776 pg = mlock_dereference(pg->next, br))
2777 if (br_port_group_equal(pg, p, src))
2783 static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx,
2784 struct net_bridge_mcast_port *pmctx,
2785 struct sk_buff *skb,
2788 bool igmpv2 = brmctx->multicast_igmp_version == 2;
2789 struct net_bridge_mdb_entry *mdst;
2790 struct net_bridge_port_group *pg;
2791 const unsigned char *src;
2792 struct igmpv3_report *ih;
2793 struct igmpv3_grec *grec;
2794 int i, len, num, type;
2795 __be32 group, *h_addr;
2796 bool changed = false;
2800 ih = igmpv3_report_hdr(skb);
2801 num = ntohs(ih->ngrec);
2802 len = skb_transport_offset(skb) + sizeof(*ih);
2804 for (i = 0; i < num; i++) {
2805 len += sizeof(*grec);
2806 if (!ip_mc_may_pull(skb, len))
2809 grec = (void *)(skb->data + len - sizeof(*grec));
2810 group = grec->grec_mca;
2811 type = grec->grec_type;
2812 nsrcs = ntohs(grec->grec_nsrcs);
2815 if (!ip_mc_may_pull(skb, len))
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:
2831 src = eth_hdr(skb)->h_source;
2833 (type == IGMPV3_CHANGE_TO_INCLUDE ||
2834 type == IGMPV3_MODE_IS_INCLUDE)) {
2835 if (!pmctx || igmpv2) {
2836 br_ip4_multicast_leave_group(brmctx, pmctx,
2841 err = br_ip4_multicast_add_group(brmctx, pmctx, group,
2847 if (!pmctx || igmpv2)
2850 spin_lock(&brmctx->br->multicast_lock);
2851 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2852 goto unlock_continue;
2854 mdst = br_mdb_ip4_get(brmctx->br, group, vid);
2856 goto unlock_continue;
2857 pg = br_multicast_find_port(mdst, pmctx->port, src);
2858 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2859 goto unlock_continue;
2860 /* reload grec and host addr */
2861 grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
2862 h_addr = &ip_hdr(skb)->saddr;
2864 case IGMPV3_ALLOW_NEW_SOURCES:
2865 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2867 nsrcs, sizeof(__be32), type);
2869 case IGMPV3_MODE_IS_INCLUDE:
2870 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
2872 nsrcs, sizeof(__be32), type);
2874 case IGMPV3_MODE_IS_EXCLUDE:
2875 changed = br_multicast_isexc(brmctx, pg, h_addr,
2877 nsrcs, sizeof(__be32), type);
2879 case IGMPV3_CHANGE_TO_INCLUDE:
2880 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
2882 nsrcs, sizeof(__be32), type);
2884 case IGMPV3_CHANGE_TO_EXCLUDE:
2885 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
2887 nsrcs, sizeof(__be32), type);
2889 case IGMPV3_BLOCK_OLD_SOURCES:
2890 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
2892 nsrcs, sizeof(__be32), type);
2896 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
2898 spin_unlock(&brmctx->br->multicast_lock);
2904 #if IS_ENABLED(CONFIG_IPV6)
2905 static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx,
2906 struct net_bridge_mcast_port *pmctx,
2907 struct sk_buff *skb,
2910 bool mldv1 = brmctx->multicast_mld_version == 1;
2911 struct net_bridge_mdb_entry *mdst;
2912 struct net_bridge_port_group *pg;
2913 unsigned int nsrcs_offset;
2914 struct mld2_report *mld2r;
2915 const unsigned char *src;
2916 struct in6_addr *h_addr;
2917 struct mld2_grec *grec;
2918 unsigned int grec_len;
2919 bool changed = false;
2923 if (!ipv6_mc_may_pull(skb, sizeof(*mld2r)))
2926 mld2r = (struct mld2_report *)icmp6_hdr(skb);
2927 num = ntohs(mld2r->mld2r_ngrec);
2928 len = skb_transport_offset(skb) + sizeof(*mld2r);
2930 for (i = 0; i < num; i++) {
2931 __be16 *_nsrcs, __nsrcs;
2934 nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
2936 if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
2937 nsrcs_offset + sizeof(__nsrcs))
2940 _nsrcs = skb_header_pointer(skb, nsrcs_offset,
2941 sizeof(__nsrcs), &__nsrcs);
2945 nsrcs = ntohs(*_nsrcs);
2946 grec_len = struct_size(grec, grec_src, nsrcs);
2948 if (!ipv6_mc_may_pull(skb, len + grec_len))
2951 grec = (struct mld2_grec *)(skb->data + len);
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:
2967 src = eth_hdr(skb)->h_source;
2968 if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
2969 grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
2971 if (!pmctx || mldv1) {
2972 br_ip6_multicast_leave_group(brmctx, pmctx,
2978 err = br_ip6_multicast_add_group(brmctx, pmctx,
2979 &grec->grec_mca, vid,
2985 if (!pmctx || mldv1)
2988 spin_lock(&brmctx->br->multicast_lock);
2989 if (!br_multicast_ctx_should_use(brmctx, pmctx))
2990 goto unlock_continue;
2992 mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid);
2994 goto unlock_continue;
2995 pg = br_multicast_find_port(mdst, pmctx->port, src);
2996 if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
2997 goto unlock_continue;
2998 h_addr = &ipv6_hdr(skb)->saddr;
2999 switch (grec->grec_type) {
3000 case MLD2_ALLOW_NEW_SOURCES:
3001 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
3002 grec->grec_src, nsrcs,
3003 sizeof(struct in6_addr),
3006 case MLD2_MODE_IS_INCLUDE:
3007 changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
3008 grec->grec_src, nsrcs,
3009 sizeof(struct in6_addr),
3012 case MLD2_MODE_IS_EXCLUDE:
3013 changed = br_multicast_isexc(brmctx, pg, h_addr,
3014 grec->grec_src, nsrcs,
3015 sizeof(struct in6_addr),
3018 case MLD2_CHANGE_TO_INCLUDE:
3019 changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
3020 grec->grec_src, nsrcs,
3021 sizeof(struct in6_addr),
3024 case MLD2_CHANGE_TO_EXCLUDE:
3025 changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
3026 grec->grec_src, nsrcs,
3027 sizeof(struct in6_addr),
3030 case MLD2_BLOCK_OLD_SOURCES:
3031 changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
3032 grec->grec_src, nsrcs,
3033 sizeof(struct in6_addr),
3038 br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
3040 spin_unlock(&brmctx->br->multicast_lock);
3047 static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx,
3048 struct net_bridge_mcast_port *pmctx,
3049 struct br_ip *saddr)
3051 int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0;
3052 struct timer_list *own_timer, *other_timer;
3053 struct bridge_mcast_querier *querier;
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))
3064 #if IS_ENABLED(CONFIG_IPV6)
3065 case htons(ETH_P_IPV6):
3066 querier = &brmctx->ip6_querier;
3067 own_timer = &brmctx->ip6_own_query.timer;
3068 other_timer = &brmctx->ip6_other_query.timer;
3069 if (ipv6_addr_cmp(&saddr->src.ip6, &querier->addr.src.ip6) <= 0)
3077 if (!timer_pending(own_timer) && !timer_pending(other_timer))
3083 br_multicast_update_querier(brmctx, querier, port_ifidx, saddr);
3088 static struct net_bridge_port *
3089 __br_multicast_get_querier_port(struct net_bridge *br,
3090 const struct bridge_mcast_querier *querier)
3092 int port_ifidx = READ_ONCE(querier->port_ifidx);
3093 struct net_bridge_port *p;
3094 struct net_device *dev;
3096 if (port_ifidx == 0)
3099 dev = dev_get_by_index_rcu(dev_net(br->dev), port_ifidx);
3102 p = br_port_get_rtnl_rcu(dev);
3103 if (!p || p->br != br)
3109 size_t br_multicast_querier_state_size(void)
3111 return nla_total_size(0) + /* nest attribute */
3112 nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */
3113 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IP_PORT */
3114 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IP_OTHER_TIMER */
3115 #if IS_ENABLED(CONFIG_IPV6)
3116 nla_total_size(sizeof(struct in6_addr)) + /* BRIDGE_QUERIER_IPV6_ADDRESS */
3117 nla_total_size(sizeof(int)) + /* BRIDGE_QUERIER_IPV6_PORT */
3118 nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IPV6_OTHER_TIMER */
3123 /* protected by rtnl or rcu */
3124 int br_multicast_dump_querier_state(struct sk_buff *skb,
3125 const struct net_bridge_mcast *brmctx,
3128 struct bridge_mcast_querier querier = {};
3129 struct net_bridge_port *p;
3130 struct nlattr *nest;
3132 if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
3133 br_multicast_ctx_vlan_global_disabled(brmctx))
3136 nest = nla_nest_start(skb, nest_attr);
3141 if (!brmctx->multicast_querier &&
3142 !timer_pending(&brmctx->ip4_other_query.timer))
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)) {
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)))) {
3163 #if IS_ENABLED(CONFIG_IPV6)
3164 if (!brmctx->multicast_querier &&
3165 !timer_pending(&brmctx->ip6_other_query.timer))
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)) {
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)))) {
3188 nla_nest_end(skb, nest);
3190 nla_nest_cancel(skb, nest);
3195 nla_nest_cancel(skb, nest);
3200 br_multicast_update_query_timer(struct net_bridge_mcast *brmctx,
3201 struct bridge_mcast_other_query *query,
3202 unsigned long max_delay)
3204 if (!timer_pending(&query->timer))
3205 mod_timer(&query->delay_timer, jiffies + max_delay);
3207 mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval);
3210 static void br_port_mc_router_state_change(struct net_bridge_port *p,
3213 struct switchdev_attr attr = {
3215 .id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
3216 .flags = SWITCHDEV_F_DEFER,
3217 .u.mrouter = is_mc_router,
3220 switchdev_port_attr_set(p->dev, &attr, NULL);
3223 static struct net_bridge_port *
3224 br_multicast_rport_from_node(struct net_bridge_mcast *brmctx,
3225 struct hlist_head *mc_router_list,
3226 struct hlist_node *rlist)
3228 struct net_bridge_mcast_port *pmctx;
3230 #if IS_ENABLED(CONFIG_IPV6)
3231 if (mc_router_list == &brmctx->ip6_mc_router_list)
3232 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3236 pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
3242 static struct hlist_node *
3243 br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx,
3244 struct net_bridge_port *port,
3245 struct hlist_head *mc_router_list)
3248 struct hlist_node *slot = NULL;
3249 struct net_bridge_port *p;
3250 struct hlist_node *rlist;
3252 hlist_for_each(rlist, mc_router_list) {
3253 p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist);
3255 if ((unsigned long)port >= (unsigned long)p)
3264 static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx,
3265 struct hlist_node *rnode)
3267 #if IS_ENABLED(CONFIG_IPV6)
3268 if (rnode != &pmctx->ip6_rlist)
3269 return hlist_unhashed(&pmctx->ip6_rlist);
3271 return hlist_unhashed(&pmctx->ip4_rlist);
3277 /* Add port to router_list
3278 * list is maintained ordered by pointer value
3279 * and locked by br->multicast_lock and RCU
3281 static void br_multicast_add_router(struct net_bridge_mcast *brmctx,
3282 struct net_bridge_mcast_port *pmctx,
3283 struct hlist_node *rlist,
3284 struct hlist_head *mc_router_list)
3286 struct hlist_node *slot;
3288 if (!hlist_unhashed(rlist))
3291 slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list);
3294 hlist_add_behind_rcu(rlist, slot);
3296 hlist_add_head_rcu(rlist, mc_router_list);
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.
3302 if (br_multicast_no_router_otherpf(pmctx, rlist)) {
3303 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB);
3304 br_port_mc_router_state_change(pmctx->port, true);
3308 /* Add port to router_list
3309 * list is maintained ordered by pointer value
3310 * and locked by br->multicast_lock and RCU
3312 static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
3313 struct net_bridge_mcast_port *pmctx)
3315 br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist,
3316 &brmctx->ip4_mc_router_list);
3319 /* Add port to router_list
3320 * list is maintained ordered by pointer value
3321 * and locked by br->multicast_lock and RCU
3323 static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
3324 struct net_bridge_mcast_port *pmctx)
3326 #if IS_ENABLED(CONFIG_IPV6)
3327 br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist,
3328 &brmctx->ip6_mc_router_list);
3332 static void br_multicast_mark_router(struct net_bridge_mcast *brmctx,
3333 struct net_bridge_mcast_port *pmctx,
3334 struct timer_list *timer,
3335 struct hlist_node *rlist,
3336 struct hlist_head *mc_router_list)
3338 unsigned long now = jiffies;
3340 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3344 if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
3345 if (!br_ip4_multicast_is_router(brmctx) &&
3346 !br_ip6_multicast_is_router(brmctx))
3347 br_mc_router_state_change(brmctx->br, true);
3348 mod_timer(timer, now + brmctx->multicast_querier_interval);
3353 if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
3354 pmctx->multicast_router == MDB_RTR_TYPE_PERM)
3357 br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list);
3358 mod_timer(timer, now + brmctx->multicast_querier_interval);
3361 static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx,
3362 struct net_bridge_mcast_port *pmctx)
3364 struct timer_list *timer = &brmctx->ip4_mc_router_timer;
3365 struct hlist_node *rlist = NULL;
3368 timer = &pmctx->ip4_mc_router_timer;
3369 rlist = &pmctx->ip4_rlist;
3372 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3373 &brmctx->ip4_mc_router_list);
3376 static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx,
3377 struct net_bridge_mcast_port *pmctx)
3379 #if IS_ENABLED(CONFIG_IPV6)
3380 struct timer_list *timer = &brmctx->ip6_mc_router_timer;
3381 struct hlist_node *rlist = NULL;
3384 timer = &pmctx->ip6_mc_router_timer;
3385 rlist = &pmctx->ip6_rlist;
3388 br_multicast_mark_router(brmctx, pmctx, timer, rlist,
3389 &brmctx->ip6_mc_router_list);
3394 br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx,
3395 struct net_bridge_mcast_port *pmctx,
3396 struct bridge_mcast_other_query *query,
3397 struct br_ip *saddr,
3398 unsigned long max_delay)
3400 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
3403 br_multicast_update_query_timer(brmctx, query, max_delay);
3404 br_ip4_multicast_mark_router(brmctx, pmctx);
3407 #if IS_ENABLED(CONFIG_IPV6)
3409 br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx,
3410 struct net_bridge_mcast_port *pmctx,
3411 struct bridge_mcast_other_query *query,
3412 struct br_ip *saddr,
3413 unsigned long max_delay)
3415 if (!br_multicast_select_querier(brmctx, pmctx, saddr))
3418 br_multicast_update_query_timer(brmctx, query, max_delay);
3419 br_ip6_multicast_mark_router(brmctx, pmctx);
3423 static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx,
3424 struct net_bridge_mcast_port *pmctx,
3425 struct sk_buff *skb,
3428 unsigned int transport_len = ip_transport_len(skb);
3429 const struct iphdr *iph = ip_hdr(skb);
3430 struct igmphdr *ih = igmp_hdr(skb);
3431 struct net_bridge_mdb_entry *mp;
3432 struct igmpv3_query *ih3;
3433 struct net_bridge_port_group *p;
3434 struct net_bridge_port_group __rcu **pp;
3435 struct br_ip saddr = {};
3436 unsigned long max_delay;
3437 unsigned long now = jiffies;
3440 spin_lock(&brmctx->br->multicast_lock);
3441 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3446 if (transport_len == sizeof(*ih)) {
3447 max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
3450 max_delay = 10 * HZ;
3453 } else if (transport_len >= sizeof(*ih3)) {
3454 ih3 = igmpv3_query_hdr(skb);
3456 (brmctx->multicast_igmp_version == 3 && group &&
3460 max_delay = ih3->code ?
3461 IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
3467 saddr.proto = htons(ETH_P_IP);
3468 saddr.src.ip4 = iph->saddr;
3470 br_ip4_multicast_query_received(brmctx, pmctx,
3471 &brmctx->ip4_other_query,
3476 mp = br_mdb_ip4_get(brmctx->br, group, vid);
3480 max_delay *= brmctx->multicast_last_member_count;
3482 if (mp->host_joined &&
3483 (timer_pending(&mp->timer) ?
3484 time_after(mp->timer.expires, now + max_delay) :
3485 try_to_del_timer_sync(&mp->timer) >= 0))
3486 mod_timer(&mp->timer, now + max_delay);
3488 for (pp = &mp->ports;
3489 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3491 if (timer_pending(&p->timer) ?
3492 time_after(p->timer.expires, now + max_delay) :
3493 try_to_del_timer_sync(&p->timer) >= 0 &&
3494 (brmctx->multicast_igmp_version == 2 ||
3495 p->filter_mode == MCAST_EXCLUDE))
3496 mod_timer(&p->timer, now + max_delay);
3500 spin_unlock(&brmctx->br->multicast_lock);
3503 #if IS_ENABLED(CONFIG_IPV6)
3504 static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx,
3505 struct net_bridge_mcast_port *pmctx,
3506 struct sk_buff *skb,
3509 unsigned int transport_len = ipv6_transport_len(skb);
3510 struct mld_msg *mld;
3511 struct net_bridge_mdb_entry *mp;
3512 struct mld2_query *mld2q;
3513 struct net_bridge_port_group *p;
3514 struct net_bridge_port_group __rcu **pp;
3515 struct br_ip saddr = {};
3516 unsigned long max_delay;
3517 unsigned long now = jiffies;
3518 unsigned int offset = skb_transport_offset(skb);
3519 const struct in6_addr *group = NULL;
3520 bool is_general_query;
3523 spin_lock(&brmctx->br->multicast_lock);
3524 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3527 if (transport_len == sizeof(*mld)) {
3528 if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
3532 mld = (struct mld_msg *) icmp6_hdr(skb);
3533 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
3535 group = &mld->mld_mca;
3537 if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
3541 mld2q = (struct mld2_query *)icmp6_hdr(skb);
3542 if (!mld2q->mld2q_nsrcs)
3543 group = &mld2q->mld2q_mca;
3544 if (brmctx->multicast_mld_version == 2 &&
3545 !ipv6_addr_any(&mld2q->mld2q_mca) &&
3546 mld2q->mld2q_suppress)
3549 max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
3552 is_general_query = group && ipv6_addr_any(group);
3554 if (is_general_query) {
3555 saddr.proto = htons(ETH_P_IPV6);
3556 saddr.src.ip6 = ipv6_hdr(skb)->saddr;
3558 br_ip6_multicast_query_received(brmctx, pmctx,
3559 &brmctx->ip6_other_query,
3562 } else if (!group) {
3566 mp = br_mdb_ip6_get(brmctx->br, group, vid);
3570 max_delay *= brmctx->multicast_last_member_count;
3571 if (mp->host_joined &&
3572 (timer_pending(&mp->timer) ?
3573 time_after(mp->timer.expires, now + max_delay) :
3574 try_to_del_timer_sync(&mp->timer) >= 0))
3575 mod_timer(&mp->timer, now + max_delay);
3577 for (pp = &mp->ports;
3578 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3580 if (timer_pending(&p->timer) ?
3581 time_after(p->timer.expires, now + max_delay) :
3582 try_to_del_timer_sync(&p->timer) >= 0 &&
3583 (brmctx->multicast_mld_version == 1 ||
3584 p->filter_mode == MCAST_EXCLUDE))
3585 mod_timer(&p->timer, now + max_delay);
3589 spin_unlock(&brmctx->br->multicast_lock);
3595 br_multicast_leave_group(struct net_bridge_mcast *brmctx,
3596 struct net_bridge_mcast_port *pmctx,
3597 struct br_ip *group,
3598 struct bridge_mcast_other_query *other_query,
3599 struct bridge_mcast_own_query *own_query,
3600 const unsigned char *src)
3602 struct net_bridge_mdb_entry *mp;
3603 struct net_bridge_port_group *p;
3607 spin_lock(&brmctx->br->multicast_lock);
3608 if (!br_multicast_ctx_should_use(brmctx, pmctx))
3611 mp = br_mdb_ip_get(brmctx->br, group);
3615 if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) {
3616 struct net_bridge_port_group __rcu **pp;
3618 for (pp = &mp->ports;
3619 (p = mlock_dereference(*pp, brmctx->br)) != NULL;
3621 if (!br_port_group_equal(p, pmctx->port, src))
3624 if (p->flags & MDB_PG_FLAGS_PERMANENT)
3627 p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
3628 br_multicast_del_pg(mp, p, pp);
3633 if (timer_pending(&other_query->timer))
3636 if (brmctx->multicast_querier) {
3637 __br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr,
3640 time = jiffies + brmctx->multicast_last_member_count *
3641 brmctx->multicast_last_member_interval;
3643 mod_timer(&own_query->timer, time);
3645 for (p = mlock_dereference(mp->ports, brmctx->br);
3646 p != NULL && pmctx != NULL;
3647 p = mlock_dereference(p->next, brmctx->br)) {
3648 if (!br_port_group_equal(p, pmctx->port, src))
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);
3663 time = now + brmctx->multicast_last_member_count *
3664 brmctx->multicast_last_member_interval;
3667 if (mp->host_joined &&
3668 (timer_pending(&mp->timer) ?
3669 time_after(mp->timer.expires, time) :
3670 try_to_del_timer_sync(&mp->timer) >= 0)) {
3671 mod_timer(&mp->timer, time);
3677 for (p = mlock_dereference(mp->ports, brmctx->br);
3679 p = mlock_dereference(p->next, brmctx->br)) {
3680 if (p->key.port != pmctx->port)
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);
3693 spin_unlock(&brmctx->br->multicast_lock);
3696 static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
3697 struct net_bridge_mcast_port *pmctx,
3700 const unsigned char *src)
3702 struct br_ip br_group;
3703 struct bridge_mcast_own_query *own_query;
3705 if (ipv4_is_local_multicast(group))
3708 own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query;
3710 memset(&br_group, 0, sizeof(br_group));
3711 br_group.dst.ip4 = group;
3712 br_group.proto = htons(ETH_P_IP);
3715 br_multicast_leave_group(brmctx, pmctx, &br_group,
3716 &brmctx->ip4_other_query,
3720 #if IS_ENABLED(CONFIG_IPV6)
3721 static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
3722 struct net_bridge_mcast_port *pmctx,
3723 const struct in6_addr *group,
3725 const unsigned char *src)
3727 struct br_ip br_group;
3728 struct bridge_mcast_own_query *own_query;
3730 if (ipv6_addr_is_ll_all_nodes(group))
3733 own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query;
3735 memset(&br_group, 0, sizeof(br_group));
3736 br_group.dst.ip6 = *group;
3737 br_group.proto = htons(ETH_P_IPV6);
3740 br_multicast_leave_group(brmctx, pmctx, &br_group,
3741 &brmctx->ip6_other_query,
3746 static void br_multicast_err_count(const struct net_bridge *br,
3747 const struct net_bridge_port *p,
3750 struct bridge_mcast_stats __percpu *stats;
3751 struct bridge_mcast_stats *pstats;
3753 if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
3757 stats = p->mcast_stats;
3759 stats = br->mcast_stats;
3760 if (WARN_ON(!stats))
3763 pstats = this_cpu_ptr(stats);
3765 u64_stats_update_begin(&pstats->syncp);
3767 case htons(ETH_P_IP):
3768 pstats->mstats.igmp_parse_errors++;
3770 #if IS_ENABLED(CONFIG_IPV6)
3771 case htons(ETH_P_IPV6):
3772 pstats->mstats.mld_parse_errors++;
3776 u64_stats_update_end(&pstats->syncp);
3779 static void br_multicast_pim(struct net_bridge_mcast *brmctx,
3780 struct net_bridge_mcast_port *pmctx,
3781 const struct sk_buff *skb)
3783 unsigned int offset = skb_transport_offset(skb);
3784 struct pimhdr *pimhdr, _pimhdr;
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)
3791 spin_lock(&brmctx->br->multicast_lock);
3792 br_ip4_multicast_mark_router(brmctx, pmctx);
3793 spin_unlock(&brmctx->br->multicast_lock);
3796 static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3797 struct net_bridge_mcast_port *pmctx,
3798 struct sk_buff *skb)
3800 if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
3801 igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
3804 spin_lock(&brmctx->br->multicast_lock);
3805 br_ip4_multicast_mark_router(brmctx, pmctx);
3806 spin_unlock(&brmctx->br->multicast_lock);
3811 static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
3812 struct net_bridge_mcast_port *pmctx,
3813 struct sk_buff *skb,
3816 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
3817 const unsigned char *src;
3821 err = ip_mc_check_igmp(skb);
3823 if (err == -ENOMSG) {
3824 if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
3825 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3826 } else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
3827 if (ip_hdr(skb)->protocol == IPPROTO_PIM)
3828 br_multicast_pim(brmctx, pmctx, skb);
3829 } else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
3830 br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb);
3834 } else if (err < 0) {
3835 br_multicast_err_count(brmctx->br, p, skb->protocol);
3840 src = eth_hdr(skb)->h_source;
3841 BR_INPUT_SKB_CB(skb)->igmp = ih->type;
3844 case IGMP_HOST_MEMBERSHIP_REPORT:
3845 case IGMPV2_HOST_MEMBERSHIP_REPORT:
3846 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3847 err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid,
3850 case IGMPV3_HOST_MEMBERSHIP_REPORT:
3851 err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid);
3853 case IGMP_HOST_MEMBERSHIP_QUERY:
3854 br_ip4_multicast_query(brmctx, pmctx, skb, vid);
3856 case IGMP_HOST_LEAVE_MESSAGE:
3857 br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src);
3861 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
3867 #if IS_ENABLED(CONFIG_IPV6)
3868 static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
3869 struct net_bridge_mcast_port *pmctx,
3870 struct sk_buff *skb)
3872 if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
3875 spin_lock(&brmctx->br->multicast_lock);
3876 br_ip6_multicast_mark_router(brmctx, pmctx);
3877 spin_unlock(&brmctx->br->multicast_lock);
3880 static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
3881 struct net_bridge_mcast_port *pmctx,
3882 struct sk_buff *skb,
3885 struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
3886 const unsigned char *src;
3887 struct mld_msg *mld;
3890 err = ipv6_mc_check_mld(skb);
3892 if (err == -ENOMSG || err == -ENODATA) {
3893 if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
3894 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3895 if (err == -ENODATA &&
3896 ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
3897 br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
3900 } else if (err < 0) {
3901 br_multicast_err_count(brmctx->br, p, skb->protocol);
3905 mld = (struct mld_msg *)skb_transport_header(skb);
3906 BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
3908 switch (mld->mld_type) {
3909 case ICMPV6_MGM_REPORT:
3910 src = eth_hdr(skb)->h_source;
3911 BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
3912 err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca,
3915 case ICMPV6_MLD2_REPORT:
3916 err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid);
3918 case ICMPV6_MGM_QUERY:
3919 err = br_ip6_multicast_query(brmctx, pmctx, skb, vid);
3921 case ICMPV6_MGM_REDUCTION:
3922 src = eth_hdr(skb)->h_source;
3923 br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid,
3928 br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
3935 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
3936 struct net_bridge_mcast_port **pmctx,
3937 struct net_bridge_vlan *vlan,
3938 struct sk_buff *skb, u16 vid)
3942 BR_INPUT_SKB_CB(skb)->igmp = 0;
3943 BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
3945 if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED))
3948 if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) {
3949 const struct net_bridge_vlan *masterv;
3951 /* the vlan has the master flag set only when transmitting
3952 * through the bridge device
3954 if (br_vlan_is_master(vlan)) {
3956 *brmctx = &vlan->br_mcast_ctx;
3959 masterv = vlan->brvlan;
3960 *brmctx = &vlan->brvlan->br_mcast_ctx;
3961 *pmctx = &vlan->port_mcast_ctx;
3964 if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
3968 switch (skb->protocol) {
3969 case htons(ETH_P_IP):
3970 ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid);
3972 #if IS_ENABLED(CONFIG_IPV6)
3973 case htons(ETH_P_IPV6):
3974 ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid);
3982 static void br_multicast_query_expired(struct net_bridge_mcast *brmctx,
3983 struct bridge_mcast_own_query *query,
3984 struct bridge_mcast_querier *querier)
3986 spin_lock(&brmctx->br->multicast_lock);
3987 if (br_multicast_ctx_vlan_disabled(brmctx))
3990 if (query->startup_sent < brmctx->multicast_startup_query_count)
3991 query->startup_sent++;
3993 br_multicast_send_query(brmctx, NULL, query);
3995 spin_unlock(&brmctx->br->multicast_lock);
3998 static void br_ip4_multicast_query_expired(struct timer_list *t)
4000 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
4001 ip4_own_query.timer);
4003 br_multicast_query_expired(brmctx, &brmctx->ip4_own_query,
4004 &brmctx->ip4_querier);
4007 #if IS_ENABLED(CONFIG_IPV6)
4008 static void br_ip6_multicast_query_expired(struct timer_list *t)
4010 struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
4011 ip6_own_query.timer);
4013 br_multicast_query_expired(brmctx, &brmctx->ip6_own_query,
4014 &brmctx->ip6_querier);
4018 static void br_multicast_gc_work(struct work_struct *work)
4020 struct net_bridge *br = container_of(work, struct net_bridge,
4022 HLIST_HEAD(deleted_head);
4024 spin_lock_bh(&br->multicast_lock);
4025 hlist_move_list(&br->mcast_gc_list, &deleted_head);
4026 spin_unlock_bh(&br->multicast_lock);
4028 br_multicast_gc(&deleted_head);
4031 void br_multicast_ctx_init(struct net_bridge *br,
4032 struct net_bridge_vlan *vlan,
4033 struct net_bridge_mcast *brmctx)
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;
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;
4048 brmctx->ip4_querier.port_ifidx = 0;
4049 seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock);
4050 brmctx->multicast_igmp_version = 2;
4051 #if IS_ENABLED(CONFIG_IPV6)
4052 brmctx->multicast_mld_version = 1;
4053 brmctx->ip6_querier.port_ifidx = 0;
4054 seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock);
4057 timer_setup(&brmctx->ip4_mc_router_timer,
4058 br_ip4_multicast_local_router_expired, 0);
4059 timer_setup(&brmctx->ip4_other_query.timer,
4060 br_ip4_multicast_querier_expired, 0);
4061 timer_setup(&brmctx->ip4_other_query.delay_timer,
4062 br_multicast_query_delay_expired, 0);
4063 timer_setup(&brmctx->ip4_own_query.timer,
4064 br_ip4_multicast_query_expired, 0);
4065 #if IS_ENABLED(CONFIG_IPV6)
4066 timer_setup(&brmctx->ip6_mc_router_timer,
4067 br_ip6_multicast_local_router_expired, 0);
4068 timer_setup(&brmctx->ip6_other_query.timer,
4069 br_ip6_multicast_querier_expired, 0);
4070 timer_setup(&brmctx->ip6_other_query.delay_timer,
4071 br_multicast_query_delay_expired, 0);
4072 timer_setup(&brmctx->ip6_own_query.timer,
4073 br_ip6_multicast_query_expired, 0);
4077 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
4079 __br_multicast_stop(brmctx);
4082 void br_multicast_init(struct net_bridge *br)
4084 br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
4086 br_multicast_ctx_init(br, NULL, &br->multicast_ctx);
4088 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
4089 br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
4091 spin_lock_init(&br->multicast_lock);
4092 INIT_HLIST_HEAD(&br->mdb_list);
4093 INIT_HLIST_HEAD(&br->mcast_gc_list);
4094 INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
4097 static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
4099 struct in_device *in_dev = in_dev_get(br->dev);
4104 __ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4108 #if IS_ENABLED(CONFIG_IPV6)
4109 static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
4111 struct in6_addr addr;
4113 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
4114 ipv6_dev_mc_inc(br->dev, &addr);
4117 static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
4122 void br_multicast_join_snoopers(struct net_bridge *br)
4124 br_ip4_multicast_join_snoopers(br);
4125 br_ip6_multicast_join_snoopers(br);
4128 static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
4130 struct in_device *in_dev = in_dev_get(br->dev);
4132 if (WARN_ON(!in_dev))
4135 __ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
4139 #if IS_ENABLED(CONFIG_IPV6)
4140 static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
4142 struct in6_addr addr;
4144 ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
4145 ipv6_dev_mc_dec(br->dev, &addr);
4148 static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
4153 void br_multicast_leave_snoopers(struct net_bridge *br)
4155 br_ip4_multicast_leave_snoopers(br);
4156 br_ip6_multicast_leave_snoopers(br);
4159 static void __br_multicast_open_query(struct net_bridge *br,
4160 struct bridge_mcast_own_query *query)
4162 query->startup_sent = 0;
4164 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
4167 mod_timer(&query->timer, jiffies);
4170 static void __br_multicast_open(struct net_bridge_mcast *brmctx)
4172 __br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query);
4173 #if IS_ENABLED(CONFIG_IPV6)
4174 __br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query);
4178 void br_multicast_open(struct net_bridge *br)
4182 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4183 struct net_bridge_vlan_group *vg;
4184 struct net_bridge_vlan *vlan;
4186 vg = br_vlan_group(br);
4188 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4189 struct net_bridge_mcast *brmctx;
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);
4198 __br_multicast_open(&br->multicast_ctx);
4202 static void __br_multicast_stop(struct net_bridge_mcast *brmctx)
4204 del_timer_sync(&brmctx->ip4_mc_router_timer);
4205 del_timer_sync(&brmctx->ip4_other_query.timer);
4206 del_timer_sync(&brmctx->ip4_other_query.delay_timer);
4207 del_timer_sync(&brmctx->ip4_own_query.timer);
4208 #if IS_ENABLED(CONFIG_IPV6)
4209 del_timer_sync(&brmctx->ip6_mc_router_timer);
4210 del_timer_sync(&brmctx->ip6_other_query.timer);
4211 del_timer_sync(&brmctx->ip6_other_query.delay_timer);
4212 del_timer_sync(&brmctx->ip6_own_query.timer);
4216 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on)
4218 struct net_bridge *br;
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
4224 if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED))
4227 if (br_vlan_is_master(vlan)) {
4230 if (!br_vlan_is_brentry(vlan) ||
4232 br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx)))
4235 spin_lock_bh(&br->multicast_lock);
4236 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4237 spin_unlock_bh(&br->multicast_lock);
4240 __br_multicast_open(&vlan->br_mcast_ctx);
4242 __br_multicast_stop(&vlan->br_mcast_ctx);
4244 struct net_bridge_mcast *brmctx;
4246 brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx);
4247 if (on && br_multicast_ctx_vlan_global_disabled(brmctx))
4250 br = vlan->port->br;
4251 spin_lock_bh(&br->multicast_lock);
4252 vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
4254 __br_multicast_enable_port_ctx(&vlan->port_mcast_ctx);
4256 __br_multicast_disable_port_ctx(&vlan->port_mcast_ctx);
4257 spin_unlock_bh(&br->multicast_lock);
4261 static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on)
4263 struct net_bridge_port *p;
4265 if (WARN_ON_ONCE(!br_vlan_is_master(vlan)))
4268 list_for_each_entry(p, &vlan->br->port_list, list) {
4269 struct net_bridge_vlan *vport;
4271 vport = br_vlan_find(nbp_vlan_group(p), vlan->vid);
4274 br_multicast_toggle_one_vlan(vport, on);
4277 if (br_vlan_is_brentry(vlan))
4278 br_multicast_toggle_one_vlan(vlan, on);
4281 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
4282 struct netlink_ext_ack *extack)
4284 struct net_bridge_vlan_group *vg;
4285 struct net_bridge_vlan *vlan;
4286 struct net_bridge_port *p;
4288 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on)
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");
4296 vg = br_vlan_group(br);
4300 br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on);
4302 /* disable/enable non-vlan mcast contexts based on vlan snooping */
4304 __br_multicast_stop(&br->multicast_ctx);
4306 __br_multicast_open(&br->multicast_ctx);
4307 list_for_each_entry(p, &br->port_list, list) {
4309 br_multicast_disable_port(p);
4311 br_multicast_enable_port(p);
4314 list_for_each_entry(vlan, &vg->vlan_list, vlist)
4315 br_multicast_toggle_vlan(vlan, on);
4320 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on)
4324 /* BR_VLFLAG_GLOBAL_MCAST_ENABLED relies on eventual consistency and
4325 * requires only RTNL to change
4327 if (on == !!(vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
4330 vlan->priv_flags ^= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
4331 br_multicast_toggle_vlan(vlan, on);
4336 void br_multicast_stop(struct net_bridge *br)
4340 if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
4341 struct net_bridge_vlan_group *vg;
4342 struct net_bridge_vlan *vlan;
4344 vg = br_vlan_group(br);
4346 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
4347 struct net_bridge_mcast *brmctx;
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);
4356 __br_multicast_stop(&br->multicast_ctx);
4360 void br_multicast_dev_del(struct net_bridge *br)
4362 struct net_bridge_mdb_entry *mp;
4363 HLIST_HEAD(deleted_head);
4364 struct hlist_node *tmp;
4366 spin_lock_bh(&br->multicast_lock);
4367 hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
4368 br_multicast_del_mdb_entry(mp);
4369 hlist_move_list(&br->mcast_gc_list, &deleted_head);
4370 spin_unlock_bh(&br->multicast_lock);
4372 br_multicast_ctx_deinit(&br->multicast_ctx);
4373 br_multicast_gc(&deleted_head);
4374 cancel_work_sync(&br->mcast_gc_work);
4379 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val)
4383 spin_lock_bh(&brmctx->br->multicast_lock);
4386 case MDB_RTR_TYPE_DISABLED:
4387 case MDB_RTR_TYPE_PERM:
4388 br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM);
4389 del_timer(&brmctx->ip4_mc_router_timer);
4390 #if IS_ENABLED(CONFIG_IPV6)
4391 del_timer(&brmctx->ip6_mc_router_timer);
4393 brmctx->multicast_router = val;
4396 case MDB_RTR_TYPE_TEMP_QUERY:
4397 if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
4398 br_mc_router_state_change(brmctx->br, false);
4399 brmctx->multicast_router = val;
4404 spin_unlock_bh(&brmctx->br->multicast_lock);
4410 br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted)
4415 /* For backwards compatibility for now, only notify if there is
4416 * no multicast router anymore for both IPv4 and IPv6.
4418 if (!hlist_unhashed(&pmctx->ip4_rlist))
4420 #if IS_ENABLED(CONFIG_IPV6)
4421 if (!hlist_unhashed(&pmctx->ip6_rlist))
4425 br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB);
4426 br_port_mc_router_state_change(pmctx->port, false);
4428 /* don't allow timer refresh */
4429 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP)
4430 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4433 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
4436 struct net_bridge_mcast *brmctx;
4437 unsigned long now = jiffies;
4441 brmctx = br_multicast_port_ctx_get_global(pmctx);
4442 spin_lock_bh(&brmctx->br->multicast_lock);
4443 if (pmctx->multicast_router == val) {
4444 /* Refresh the temp router port timer */
4445 if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) {
4446 mod_timer(&pmctx->ip4_mc_router_timer,
4447 now + brmctx->multicast_querier_interval);
4448 #if IS_ENABLED(CONFIG_IPV6)
4449 mod_timer(&pmctx->ip6_mc_router_timer,
4450 now + brmctx->multicast_querier_interval);
4457 case MDB_RTR_TYPE_DISABLED:
4458 pmctx->multicast_router = MDB_RTR_TYPE_DISABLED;
4459 del |= br_ip4_multicast_rport_del(pmctx);
4460 del_timer(&pmctx->ip4_mc_router_timer);
4461 del |= br_ip6_multicast_rport_del(pmctx);
4462 #if IS_ENABLED(CONFIG_IPV6)
4463 del_timer(&pmctx->ip6_mc_router_timer);
4465 br_multicast_rport_del_notify(pmctx, del);
4467 case MDB_RTR_TYPE_TEMP_QUERY:
4468 pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
4469 del |= br_ip4_multicast_rport_del(pmctx);
4470 del |= br_ip6_multicast_rport_del(pmctx);
4471 br_multicast_rport_del_notify(pmctx, del);
4473 case MDB_RTR_TYPE_PERM:
4474 pmctx->multicast_router = MDB_RTR_TYPE_PERM;
4475 del_timer(&pmctx->ip4_mc_router_timer);
4476 br_ip4_multicast_add_router(brmctx, pmctx);
4477 #if IS_ENABLED(CONFIG_IPV6)
4478 del_timer(&pmctx->ip6_mc_router_timer);
4480 br_ip6_multicast_add_router(brmctx, pmctx);
4482 case MDB_RTR_TYPE_TEMP:
4483 pmctx->multicast_router = MDB_RTR_TYPE_TEMP;
4484 br_ip4_multicast_mark_router(brmctx, pmctx);
4485 br_ip6_multicast_mark_router(brmctx, pmctx);
4492 spin_unlock_bh(&brmctx->br->multicast_lock);
4497 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router)
4501 if (br_vlan_is_master(v))
4502 err = br_multicast_set_router(&v->br_mcast_ctx, mcast_router);
4504 err = br_multicast_set_port_router(&v->port_mcast_ctx,
4510 static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
4511 struct bridge_mcast_own_query *query)
4513 struct net_bridge_port *port;
4515 if (!br_multicast_ctx_matches_vlan_snooping(brmctx))
4518 __br_multicast_open_query(brmctx->br, query);
4521 list_for_each_entry_rcu(port, &brmctx->br->port_list, list) {
4522 struct bridge_mcast_own_query *ip4_own_query;
4523 #if IS_ENABLED(CONFIG_IPV6)
4524 struct bridge_mcast_own_query *ip6_own_query;
4527 if (br_multicast_port_ctx_state_stopped(&port->multicast_ctx))
4530 if (br_multicast_ctx_is_vlan(brmctx)) {
4531 struct net_bridge_vlan *vlan;
4533 vlan = br_vlan_find(nbp_vlan_group_rcu(port),
4536 br_multicast_port_ctx_state_stopped(&vlan->port_mcast_ctx))
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;
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;
4550 if (query == &brmctx->ip4_own_query)
4551 br_multicast_enable(ip4_own_query);
4552 #if IS_ENABLED(CONFIG_IPV6)
4554 br_multicast_enable(ip6_own_query);
4560 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
4561 struct netlink_ext_ack *extack)
4563 struct net_bridge_port *port;
4564 bool change_snoopers = false;
4567 spin_lock_bh(&br->multicast_lock);
4568 if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
4571 err = br_mc_disabled_update(br->dev, val, extack);
4572 if (err == -EOPNOTSUPP)
4577 br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
4578 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
4579 change_snoopers = true;
4583 if (!netif_running(br->dev))
4586 br_multicast_open(br);
4587 list_for_each_entry(port, &br->port_list, list)
4588 __br_multicast_enable_port_ctx(&port->multicast_ctx);
4590 change_snoopers = true;
4593 spin_unlock_bh(&br->multicast_lock);
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
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.
4607 if (change_snoopers) {
4608 if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
4609 br_multicast_join_snoopers(br);
4611 br_multicast_leave_snoopers(br);
4617 bool br_multicast_enabled(const struct net_device *dev)
4619 struct net_bridge *br = netdev_priv(dev);
4621 return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
4623 EXPORT_SYMBOL_GPL(br_multicast_enabled);
4625 bool br_multicast_router(const struct net_device *dev)
4627 struct net_bridge *br = netdev_priv(dev);
4630 spin_lock_bh(&br->multicast_lock);
4631 is_router = br_multicast_is_router(&br->multicast_ctx, NULL);
4632 spin_unlock_bh(&br->multicast_lock);
4635 EXPORT_SYMBOL_GPL(br_multicast_router);
4637 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val)
4639 unsigned long max_delay;
4643 spin_lock_bh(&brmctx->br->multicast_lock);
4644 if (brmctx->multicast_querier == val)
4647 WRITE_ONCE(brmctx->multicast_querier, val);
4651 max_delay = brmctx->multicast_query_response_interval;
4653 if (!timer_pending(&brmctx->ip4_other_query.timer))
4654 mod_timer(&brmctx->ip4_other_query.delay_timer,
4655 jiffies + max_delay);
4657 br_multicast_start_querier(brmctx, &brmctx->ip4_own_query);
4659 #if IS_ENABLED(CONFIG_IPV6)
4660 if (!timer_pending(&brmctx->ip6_other_query.timer))
4661 mod_timer(&brmctx->ip6_other_query.delay_timer,
4662 jiffies + max_delay);
4664 br_multicast_start_querier(brmctx, &brmctx->ip6_own_query);
4668 spin_unlock_bh(&brmctx->br->multicast_lock);
4673 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
4676 /* Currently we support only version 2 and 3 */
4685 spin_lock_bh(&brmctx->br->multicast_lock);
4686 brmctx->multicast_igmp_version = val;
4687 spin_unlock_bh(&brmctx->br->multicast_lock);
4692 #if IS_ENABLED(CONFIG_IPV6)
4693 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
4696 /* Currently we support version 1 and 2 */
4705 spin_lock_bh(&brmctx->br->multicast_lock);
4706 brmctx->multicast_mld_version = val;
4707 spin_unlock_bh(&brmctx->br->multicast_lock);
4713 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
4716 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4718 if (intvl_jiffies < BR_MULTICAST_QUERY_INTVL_MIN) {
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;
4726 brmctx->multicast_query_interval = intvl_jiffies;
4729 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
4732 unsigned long intvl_jiffies = clock_t_to_jiffies(val);
4734 if (intvl_jiffies < BR_MULTICAST_STARTUP_QUERY_INTVL_MIN) {
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;
4742 brmctx->multicast_startup_query_interval = intvl_jiffies;
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
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.
4754 * Returns the number of items added to br_ip_list.
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
4762 int br_multicast_list_adjacent(struct net_device *dev,
4763 struct list_head *br_ip_list)
4765 struct net_bridge *br;
4766 struct net_bridge_port *port;
4767 struct net_bridge_port_group *group;
4768 struct br_ip_list *entry;
4772 if (!br_ip_list || !netif_is_bridge_port(dev))
4775 port = br_port_get_rcu(dev);
4776 if (!port || !port->br)
4781 list_for_each_entry_rcu(port, &br->port_list, list) {
4782 if (!port->dev || port->dev == dev)
4785 hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
4786 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
4790 entry->addr = group->key.addr;
4791 list_add(&entry->list, br_ip_list);
4800 EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
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
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.
4811 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
4813 struct net_bridge *br;
4814 struct net_bridge_port *port;
4819 if (!netif_is_bridge_port(dev))
4822 port = br_port_get_rcu(dev);
4823 if (!port || !port->br)
4828 memset(ð, 0, sizeof(eth));
4829 eth.h_proto = htons(proto);
4831 ret = br_multicast_querier_exists(&br->multicast_ctx, ð, NULL);
4837 EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
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
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.
4848 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
4850 struct net_bridge_mcast *brmctx;
4851 struct net_bridge *br;
4852 struct net_bridge_port *port;
4857 if (!netif_is_bridge_port(dev))
4860 port = br_port_get_rcu(dev);
4861 if (!port || !port->br)
4865 brmctx = &br->multicast_ctx;
4869 port_ifidx = brmctx->ip4_querier.port_ifidx;
4870 if (!timer_pending(&brmctx->ip4_other_query.timer) ||
4871 port_ifidx == port->dev->ifindex)
4874 #if IS_ENABLED(CONFIG_IPV6)
4876 port_ifidx = brmctx->ip6_querier.port_ifidx;
4877 if (!timer_pending(&brmctx->ip6_other_query.timer) ||
4878 port_ifidx == port->dev->ifindex)
4891 EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
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
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.
4902 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto)
4904 struct net_bridge_mcast_port *pmctx;
4905 struct net_bridge_mcast *brmctx;
4906 struct net_bridge_port *port;
4910 port = br_port_get_check_rcu(dev);
4914 brmctx = &port->br->multicast_ctx;
4917 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
4919 if (pmctx->port == port)
4926 #if IS_ENABLED(CONFIG_IPV6)
4928 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
4930 if (pmctx->port == port)
4939 /* when compiled without IPv6 support, be conservative and
4940 * always assume presence of an IPv6 multicast router
4949 EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);
4951 static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
4952 const struct sk_buff *skb, u8 type, u8 dir)
4954 struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
4955 __be16 proto = skb->protocol;
4958 u64_stats_update_begin(&pstats->syncp);
4960 case htons(ETH_P_IP):
4961 t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
4963 case IGMP_HOST_MEMBERSHIP_REPORT:
4964 pstats->mstats.igmp_v1reports[dir]++;
4966 case IGMPV2_HOST_MEMBERSHIP_REPORT:
4967 pstats->mstats.igmp_v2reports[dir]++;
4969 case IGMPV3_HOST_MEMBERSHIP_REPORT:
4970 pstats->mstats.igmp_v3reports[dir]++;
4972 case IGMP_HOST_MEMBERSHIP_QUERY:
4973 if (t_len != sizeof(struct igmphdr)) {
4974 pstats->mstats.igmp_v3queries[dir]++;
4976 unsigned int offset = skb_transport_offset(skb);
4977 struct igmphdr *ih, _ihdr;
4979 ih = skb_header_pointer(skb, offset,
4980 sizeof(_ihdr), &_ihdr);
4984 pstats->mstats.igmp_v1queries[dir]++;
4986 pstats->mstats.igmp_v2queries[dir]++;
4989 case IGMP_HOST_LEAVE_MESSAGE:
4990 pstats->mstats.igmp_leaves[dir]++;
4994 #if IS_ENABLED(CONFIG_IPV6)
4995 case htons(ETH_P_IPV6):
4996 t_len = ntohs(ipv6_hdr(skb)->payload_len) +
4997 sizeof(struct ipv6hdr);
4998 t_len -= skb_network_header_len(skb);
5000 case ICMPV6_MGM_REPORT:
5001 pstats->mstats.mld_v1reports[dir]++;
5003 case ICMPV6_MLD2_REPORT:
5004 pstats->mstats.mld_v2reports[dir]++;
5006 case ICMPV6_MGM_QUERY:
5007 if (t_len != sizeof(struct mld_msg))
5008 pstats->mstats.mld_v2queries[dir]++;
5010 pstats->mstats.mld_v1queries[dir]++;
5012 case ICMPV6_MGM_REDUCTION:
5013 pstats->mstats.mld_leaves[dir]++;
5017 #endif /* CONFIG_IPV6 */
5019 u64_stats_update_end(&pstats->syncp);
5022 void br_multicast_count(struct net_bridge *br,
5023 const struct net_bridge_port *p,
5024 const struct sk_buff *skb, u8 type, u8 dir)
5026 struct bridge_mcast_stats __percpu *stats;
5028 /* if multicast_disabled is true then igmp type can't be set */
5029 if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
5033 stats = p->mcast_stats;
5035 stats = br->mcast_stats;
5036 if (WARN_ON(!stats))
5039 br_mcast_stats_add(stats, skb, type, dir);
5042 int br_multicast_init_stats(struct net_bridge *br)
5044 br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
5045 if (!br->mcast_stats)
5051 void br_multicast_uninit_stats(struct net_bridge *br)
5053 free_percpu(br->mcast_stats);
5056 /* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
5057 static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
5059 dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
5060 dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
5063 void br_multicast_get_stats(const struct net_bridge *br,
5064 const struct net_bridge_port *p,
5065 struct br_mcast_stats *dest)
5067 struct bridge_mcast_stats __percpu *stats;
5068 struct br_mcast_stats tdst;
5071 memset(dest, 0, sizeof(*dest));
5073 stats = p->mcast_stats;
5075 stats = br->mcast_stats;
5076 if (WARN_ON(!stats))
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;
5086 start = u64_stats_fetch_begin(&cpu_stats->syncp);
5087 memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
5088 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
5090 mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
5091 mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
5092 mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
5093 mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
5094 mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
5095 mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
5096 mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
5097 tdst.igmp_parse_errors += temp.igmp_parse_errors;
5099 mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
5100 mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
5101 mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
5102 mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
5103 mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
5104 tdst.mld_parse_errors += temp.mld_parse_errors;
5106 memcpy(dest, &tdst, sizeof(*dest));
5109 int br_mdb_hash_init(struct net_bridge *br)
5113 err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
5117 err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
5119 rhashtable_destroy(&br->sg_port_tbl);
5126 void br_mdb_hash_fini(struct net_bridge *br)
5128 rhashtable_destroy(&br->sg_port_tbl);
5129 rhashtable_destroy(&br->mdb_hash_tbl);