Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4946 insertions, 0 deletions

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
new file mode 100644
index 000000000..db4f2641d
--- /dev/null
+++ b/net/bridge/br_multicast.c
@@ -0,0 +1,4946 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Bridge multicast support.
+ *
+ * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
+ */
+
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/if_ether.h>
+#include <linux/igmp.h>
+#include <linux/in.h>
+#include <linux/jhash.h>
+#include <linux/kernel.h>
+#include <linux/log2.h>
+#include <linux/netdevice.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/random.h>
+#include <linux/rculist.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/inetdevice.h>
+#include <linux/mroute.h>
+#include <net/ip.h>
+#include <net/switchdev.h>
+#if IS_ENABLED(CONFIG_IPV6)
+#include <linux/icmpv6.h>
+#include <net/ipv6.h>
+#include <net/mld.h>
+#include <net/ip6_checksum.h>
+#include <net/addrconf.h>
+#endif
+
+#include "br_private.h"
+#include "br_private_mcast_eht.h"
+
+static const struct rhashtable_params br_mdb_rht_params = {
+	.head_offset = offsetof(struct net_bridge_mdb_entry, rhnode),
+	.key_offset = offsetof(struct net_bridge_mdb_entry, addr),
+	.key_len = sizeof(struct br_ip),
+	.automatic_shrinking = true,
+};
+
+static const struct rhashtable_params br_sg_port_rht_params = {
+	.head_offset = offsetof(struct net_bridge_port_group, rhnode),
+	.key_offset = offsetof(struct net_bridge_port_group, key),
+	.key_len = sizeof(struct net_bridge_port_group_sg_key),
+	.automatic_shrinking = true,
+};
+
+static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
+				       struct bridge_mcast_own_query *query);
+static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
+					struct net_bridge_mcast_port *pmctx);
+static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
+					 struct net_bridge_mcast_port *pmctx,
+					 __be32 group,
+					 __u16 vid,
+					 const unsigned char *src);
+static void br_multicast_port_group_rexmit(struct timer_list *t);
+
+static void
+br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted);
+static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
+					struct net_bridge_mcast_port *pmctx);
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
+					 struct net_bridge_mcast_port *pmctx,
+					 const struct in6_addr *group,
+					 __u16 vid, const unsigned char *src);
+#endif
+static struct net_bridge_port_group *
+__br_multicast_add_group(struct net_bridge_mcast *brmctx,
+			 struct net_bridge_mcast_port *pmctx,
+			 struct br_ip *group,
+			 const unsigned char *src,
+			 u8 filter_mode,
+			 bool igmpv2_mldv1,
+			 bool blocked);
+static void br_multicast_find_del_pg(struct net_bridge *br,
+				     struct net_bridge_port_group *pg);
+static void __br_multicast_stop(struct net_bridge_mcast *brmctx);
+
+static int br_mc_disabled_update(struct net_device *dev, bool value,
+				 struct netlink_ext_ack *extack);
+
+static struct net_bridge_port_group *
+br_sg_port_find(struct net_bridge *br,
+		struct net_bridge_port_group_sg_key *sg_p)
+{
+	lockdep_assert_held_once(&br->multicast_lock);
+
+	return rhashtable_lookup_fast(&br->sg_port_tbl, sg_p,
+				      br_sg_port_rht_params);
+}
+
+static struct net_bridge_mdb_entry *br_mdb_ip_get_rcu(struct net_bridge *br,
+						      struct br_ip *dst)
+{
+	return rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
+}
+
+struct net_bridge_mdb_entry *br_mdb_ip_get(struct net_bridge *br,
+					   struct br_ip *dst)
+{
+	struct net_bridge_mdb_entry *ent;
+
+	lockdep_assert_held_once(&br->multicast_lock);
+
+	rcu_read_lock();
+	ent = rhashtable_lookup(&br->mdb_hash_tbl, dst, br_mdb_rht_params);
+	rcu_read_unlock();
+
+	return ent;
+}
+
+static struct net_bridge_mdb_entry *br_mdb_ip4_get(struct net_bridge *br,
+						   __be32 dst, __u16 vid)
+{
+	struct br_ip br_dst;
+
+	memset(&br_dst, 0, sizeof(br_dst));
+	br_dst.dst.ip4 = dst;
+	br_dst.proto = htons(ETH_P_IP);
+	br_dst.vid = vid;
+
+	return br_mdb_ip_get(br, &br_dst);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static struct net_bridge_mdb_entry *br_mdb_ip6_get(struct net_bridge *br,
+						   const struct in6_addr *dst,
+						   __u16 vid)
+{
+	struct br_ip br_dst;
+
+	memset(&br_dst, 0, sizeof(br_dst));
+	br_dst.dst.ip6 = *dst;
+	br_dst.proto = htons(ETH_P_IPV6);
+	br_dst.vid = vid;
+
+	return br_mdb_ip_get(br, &br_dst);
+}
+#endif
+
+struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
+					struct sk_buff *skb, u16 vid)
+{
+	struct net_bridge *br = brmctx->br;
+	struct br_ip ip;
+
+	if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
+	    br_multicast_ctx_vlan_global_disabled(brmctx))
+		return NULL;
+
+	if (BR_INPUT_SKB_CB(skb)->igmp)
+		return NULL;
+
+	memset(&ip, 0, sizeof(ip));
+	ip.proto = skb->protocol;
+	ip.vid = vid;
+
+	switch (skb->protocol) {
+	case htons(ETH_P_IP):
+		ip.dst.ip4 = ip_hdr(skb)->daddr;
+		if (brmctx->multicast_igmp_version == 3) {
+			struct net_bridge_mdb_entry *mdb;
+
+			ip.src.ip4 = ip_hdr(skb)->saddr;
+			mdb = br_mdb_ip_get_rcu(br, &ip);
+			if (mdb)
+				return mdb;
+			ip.src.ip4 = 0;
+		}
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		ip.dst.ip6 = ipv6_hdr(skb)->daddr;
+		if (brmctx->multicast_mld_version == 2) {
+			struct net_bridge_mdb_entry *mdb;
+
+			ip.src.ip6 = ipv6_hdr(skb)->saddr;
+			mdb = br_mdb_ip_get_rcu(br, &ip);
+			if (mdb)
+				return mdb;
+			memset(&ip.src.ip6, 0, sizeof(ip.src.ip6));
+		}
+		break;
+#endif
+	default:
+		ip.proto = 0;
+		ether_addr_copy(ip.dst.mac_addr, eth_hdr(skb)->h_dest);
+	}
+
+	return br_mdb_ip_get_rcu(br, &ip);
+}
+
+/* IMPORTANT: this function must be used only when the contexts cannot be
+ * passed down (e.g. timer) and must be used for read-only purposes because
+ * the vlan snooping option can change, so it can return any context
+ * (non-vlan or vlan). Its initial intended purpose is to read timer values
+ * from the *current* context based on the option. At worst that could lead
+ * to inconsistent timers when the contexts are changed, i.e. src timer
+ * which needs to re-arm with a specific delay taken from the old context
+ */
+static struct net_bridge_mcast_port *
+br_multicast_pg_to_port_ctx(const struct net_bridge_port_group *pg)
+{
+	struct net_bridge_mcast_port *pmctx = &pg->key.port->multicast_ctx;
+	struct net_bridge_vlan *vlan;
+
+	lockdep_assert_held_once(&pg->key.port->br->multicast_lock);
+
+	/* if vlan snooping is disabled use the port's multicast context */
+	if (!pg->key.addr.vid ||
+	    !br_opt_get(pg->key.port->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED))
+		goto out;
+
+	/* locking is tricky here, due to different rules for multicast and
+	 * vlans we need to take rcu to find the vlan and make sure it has
+	 * the BR_VLFLAG_MCAST_ENABLED flag set, it can only change under
+	 * multicast_lock which must be already held here, so the vlan's pmctx
+	 * can safely be used on return
+	 */
+	rcu_read_lock();
+	vlan = br_vlan_find(nbp_vlan_group_rcu(pg->key.port), pg->key.addr.vid);
+	if (vlan && !br_multicast_port_ctx_vlan_disabled(&vlan->port_mcast_ctx))
+		pmctx = &vlan->port_mcast_ctx;
+	else
+		pmctx = NULL;
+	rcu_read_unlock();
+out:
+	return pmctx;
+}
+
+/* when snooping we need to check if the contexts should be used
+ * in the following order:
+ * - if pmctx is non-NULL (port), check if it should be used
+ * - if pmctx is NULL (bridge), check if brmctx should be used
+ */
+static bool
+br_multicast_ctx_should_use(const struct net_bridge_mcast *brmctx,
+			    const struct net_bridge_mcast_port *pmctx)
+{
+	if (!netif_running(brmctx->br->dev))
+		return false;
+
+	if (pmctx)
+		return !br_multicast_port_ctx_state_disabled(pmctx);
+	else
+		return !br_multicast_ctx_vlan_disabled(brmctx);
+}
+
+static bool br_port_group_equal(struct net_bridge_port_group *p,
+				struct net_bridge_port *port,
+				const unsigned char *src)
+{
+	if (p->key.port != port)
+		return false;
+
+	if (!(port->flags & BR_MULTICAST_TO_UNICAST))
+		return true;
+
+	return ether_addr_equal(src, p->eth_addr);
+}
+
+static void __fwd_add_star_excl(struct net_bridge_mcast_port *pmctx,
+				struct net_bridge_port_group *pg,
+				struct br_ip *sg_ip)
+{
+	struct net_bridge_port_group_sg_key sg_key;
+	struct net_bridge_port_group *src_pg;
+	struct net_bridge_mcast *brmctx;
+
+	memset(&sg_key, 0, sizeof(sg_key));
+	brmctx = br_multicast_port_ctx_get_global(pmctx);
+	sg_key.port = pg->key.port;
+	sg_key.addr = *sg_ip;
+	if (br_sg_port_find(brmctx->br, &sg_key))
+		return;
+
+	src_pg = __br_multicast_add_group(brmctx, pmctx,
+					  sg_ip, pg->eth_addr,
+					  MCAST_INCLUDE, false, false);
+	if (IS_ERR_OR_NULL(src_pg) ||
+	    src_pg->rt_protocol != RTPROT_KERNEL)
+		return;
+
+	src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
+}
+
+static void __fwd_del_star_excl(struct net_bridge_port_group *pg,
+				struct br_ip *sg_ip)
+{
+	struct net_bridge_port_group_sg_key sg_key;
+	struct net_bridge *br = pg->key.port->br;
+	struct net_bridge_port_group *src_pg;
+
+	memset(&sg_key, 0, sizeof(sg_key));
+	sg_key.port = pg->key.port;
+	sg_key.addr = *sg_ip;
+	src_pg = br_sg_port_find(br, &sg_key);
+	if (!src_pg || !(src_pg->flags & MDB_PG_FLAGS_STAR_EXCL) ||
+	    src_pg->rt_protocol != RTPROT_KERNEL)
+		return;
+
+	br_multicast_find_del_pg(br, src_pg);
+}
+
+/* When a port group transitions to (or is added as) EXCLUDE we need to add it
+ * to all other ports' S,G entries which are not blocked by the current group
+ * for proper replication, the assumption is that any S,G blocked entries
+ * are already added so the S,G,port lookup should skip them.
+ * When a port group transitions from EXCLUDE -> INCLUDE mode or is being
+ * deleted we need to remove it from all ports' S,G entries where it was
+ * automatically installed before (i.e. where it's MDB_PG_FLAGS_STAR_EXCL).
+ */
+void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
+				     u8 filter_mode)
+{
+	struct net_bridge *br = pg->key.port->br;
+	struct net_bridge_port_group *pg_lst;
+	struct net_bridge_mcast_port *pmctx;
+	struct net_bridge_mdb_entry *mp;
+	struct br_ip sg_ip;
+
+	if (WARN_ON(!br_multicast_is_star_g(&pg->key.addr)))
+		return;
+
+	mp = br_mdb_ip_get(br, &pg->key.addr);
+	if (!mp)
+		return;
+	pmctx = br_multicast_pg_to_port_ctx(pg);
+	if (!pmctx)
+		return;
+
+	memset(&sg_ip, 0, sizeof(sg_ip));
+	sg_ip = pg->key.addr;
+
+	for (pg_lst = mlock_dereference(mp->ports, br);
+	     pg_lst;
+	     pg_lst = mlock_dereference(pg_lst->next, br)) {
+		struct net_bridge_group_src *src_ent;
+
+		if (pg_lst == pg)
+			continue;
+		hlist_for_each_entry(src_ent, &pg_lst->src_list, node) {
+			if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
+				continue;
+			sg_ip.src = src_ent->addr.src;
+			switch (filter_mode) {
+			case MCAST_INCLUDE:
+				__fwd_del_star_excl(pg, &sg_ip);
+				break;
+			case MCAST_EXCLUDE:
+				__fwd_add_star_excl(pmctx, pg, &sg_ip);
+				break;
+			}
+		}
+	}
+}
+
+/* called when adding a new S,G with host_joined == false by default */
+static void br_multicast_sg_host_state(struct net_bridge_mdb_entry *star_mp,
+				       struct net_bridge_port_group *sg)
+{
+	struct net_bridge_mdb_entry *sg_mp;
+
+	if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
+		return;
+	if (!star_mp->host_joined)
+		return;
+
+	sg_mp = br_mdb_ip_get(star_mp->br, &sg->key.addr);
+	if (!sg_mp)
+		return;
+	sg_mp->host_joined = true;
+}
+
+/* set the host_joined state of all of *,G's S,G entries */
+static void br_multicast_star_g_host_state(struct net_bridge_mdb_entry *star_mp)
+{
+	struct net_bridge *br = star_mp->br;
+	struct net_bridge_mdb_entry *sg_mp;
+	struct net_bridge_port_group *pg;
+	struct br_ip sg_ip;
+
+	if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
+		return;
+
+	memset(&sg_ip, 0, sizeof(sg_ip));
+	sg_ip = star_mp->addr;
+	for (pg = mlock_dereference(star_mp->ports, br);
+	     pg;
+	     pg = mlock_dereference(pg->next, br)) {
+		struct net_bridge_group_src *src_ent;
+
+		hlist_for_each_entry(src_ent, &pg->src_list, node) {
+			if (!(src_ent->flags & BR_SGRP_F_INSTALLED))
+				continue;
+			sg_ip.src = src_ent->addr.src;
+			sg_mp = br_mdb_ip_get(br, &sg_ip);
+			if (!sg_mp)
+				continue;
+			sg_mp->host_joined = star_mp->host_joined;
+		}
+	}
+}
+
+static void br_multicast_sg_del_exclude_ports(struct net_bridge_mdb_entry *sgmp)
+{
+	struct net_bridge_port_group __rcu **pp;
+	struct net_bridge_port_group *p;
+
+	/* *,G exclude ports are only added to S,G entries */
+	if (WARN_ON(br_multicast_is_star_g(&sgmp->addr)))
+		return;
+
+	/* we need the STAR_EXCLUDE ports if there are non-STAR_EXCLUDE ports
+	 * we should ignore perm entries since they're managed by user-space
+	 */
+	for (pp = &sgmp->ports;
+	     (p = mlock_dereference(*pp, sgmp->br)) != NULL;
+	     pp = &p->next)
+		if (!(p->flags & (MDB_PG_FLAGS_STAR_EXCL |
+				  MDB_PG_FLAGS_PERMANENT)))
+			return;
+
+	/* currently the host can only have joined the *,G which means
+	 * we treat it as EXCLUDE {}, so for an S,G it's considered a
+	 * STAR_EXCLUDE entry and we can safely leave it
+	 */
+	sgmp->host_joined = false;
+
+	for (pp = &sgmp->ports;
+	     (p = mlock_dereference(*pp, sgmp->br)) != NULL;) {
+		if (!(p->flags & MDB_PG_FLAGS_PERMANENT))
+			br_multicast_del_pg(sgmp, p, pp);
+		else
+			pp = &p->next;
+	}
+}
+
+void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
+				       struct net_bridge_port_group *sg)
+{
+	struct net_bridge_port_group_sg_key sg_key;
+	struct net_bridge *br = star_mp->br;
+	struct net_bridge_mcast_port *pmctx;
+	struct net_bridge_port_group *pg;
+	struct net_bridge_mcast *brmctx;
+
+	if (WARN_ON(br_multicast_is_star_g(&sg->key.addr)))
+		return;
+	if (WARN_ON(!br_multicast_is_star_g(&star_mp->addr)))
+		return;
+
+	br_multicast_sg_host_state(star_mp, sg);
+	memset(&sg_key, 0, sizeof(sg_key));
+	sg_key.addr = sg->key.addr;
+	/* we need to add all exclude ports to the S,G */
+	for (pg = mlock_dereference(star_mp->ports, br);
+	     pg;
+	     pg = mlock_dereference(pg->next, br)) {
+		struct net_bridge_port_group *src_pg;
+
+		if (pg == sg || pg->filter_mode == MCAST_INCLUDE)
+			continue;
+
+		sg_key.port = pg->key.port;
+		if (br_sg_port_find(br, &sg_key))
+			continue;
+
+		pmctx = br_multicast_pg_to_port_ctx(pg);
+		if (!pmctx)
+			continue;
+		brmctx = br_multicast_port_ctx_get_global(pmctx);
+
+		src_pg = __br_multicast_add_group(brmctx, pmctx,
+						  &sg->key.addr,
+						  sg->eth_addr,
+						  MCAST_INCLUDE, false, false);
+		if (IS_ERR_OR_NULL(src_pg) ||
+		    src_pg->rt_protocol != RTPROT_KERNEL)
+			continue;
+		src_pg->flags |= MDB_PG_FLAGS_STAR_EXCL;
+	}
+}
+
+static void br_multicast_fwd_src_add(struct net_bridge_group_src *src)
+{
+	struct net_bridge_mdb_entry *star_mp;
+	struct net_bridge_mcast_port *pmctx;
+	struct net_bridge_port_group *sg;
+	struct net_bridge_mcast *brmctx;
+	struct br_ip sg_ip;
+
+	if (src->flags & BR_SGRP_F_INSTALLED)
+		return;
+
+	memset(&sg_ip, 0, sizeof(sg_ip));
+	pmctx = br_multicast_pg_to_port_ctx(src->pg);
+	if (!pmctx)
+		return;
+	brmctx = br_multicast_port_ctx_get_global(pmctx);
+	sg_ip = src->pg->key.addr;
+	sg_ip.src = src->addr.src;
+
+	sg = __br_multicast_add_group(brmctx, pmctx, &sg_ip,
+				      src->pg->eth_addr, MCAST_INCLUDE, false,
+				      !timer_pending(&src->timer));
+	if (IS_ERR_OR_NULL(sg))
+		return;
+	src->flags |= BR_SGRP_F_INSTALLED;
+	sg->flags &= ~MDB_PG_FLAGS_STAR_EXCL;
+
+	/* if it was added by user-space as perm we can skip next steps */
+	if (sg->rt_protocol != RTPROT_KERNEL &&
+	    (sg->flags & MDB_PG_FLAGS_PERMANENT))
+		return;
+
+	/* the kernel is now responsible for removing this S,G */
+	del_timer(&sg->timer);
+	star_mp = br_mdb_ip_get(src->br, &src->pg->key.addr);
+	if (!star_mp)
+		return;
+
+	br_multicast_sg_add_exclude_ports(star_mp, sg);
+}
+
+static void br_multicast_fwd_src_remove(struct net_bridge_group_src *src,
+					bool fastleave)
+{
+	struct net_bridge_port_group *p, *pg = src->pg;
+	struct net_bridge_port_group __rcu **pp;
+	struct net_bridge_mdb_entry *mp;
+	struct br_ip sg_ip;
+
+	memset(&sg_ip, 0, sizeof(sg_ip));
+	sg_ip = pg->key.addr;
+	sg_ip.src = src->addr.src;
+
+	mp = br_mdb_ip_get(src->br, &sg_ip);
+	if (!mp)
+		return;
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, src->br)) != NULL;
+	     pp = &p->next) {
+		if (!br_port_group_equal(p, pg->key.port, pg->eth_addr))
+			continue;
+
+		if (p->rt_protocol != RTPROT_KERNEL &&
+		    (p->flags & MDB_PG_FLAGS_PERMANENT))
+			break;
+
+		if (fastleave)
+			p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
+		br_multicast_del_pg(mp, p, pp);
+		break;
+	}
+	src->flags &= ~BR_SGRP_F_INSTALLED;
+}
+
+/* install S,G and based on src's timer enable or disable forwarding */
+static void br_multicast_fwd_src_handle(struct net_bridge_group_src *src)
+{
+	struct net_bridge_port_group_sg_key sg_key;
+	struct net_bridge_port_group *sg;
+	u8 old_flags;
+
+	br_multicast_fwd_src_add(src);
+
+	memset(&sg_key, 0, sizeof(sg_key));
+	sg_key.addr = src->pg->key.addr;
+	sg_key.addr.src = src->addr.src;
+	sg_key.port = src->pg->key.port;
+
+	sg = br_sg_port_find(src->br, &sg_key);
+	if (!sg || (sg->flags & MDB_PG_FLAGS_PERMANENT))
+		return;
+
+	old_flags = sg->flags;
+	if (timer_pending(&src->timer))
+		sg->flags &= ~MDB_PG_FLAGS_BLOCKED;
+	else
+		sg->flags |= MDB_PG_FLAGS_BLOCKED;
+
+	if (old_flags != sg->flags) {
+		struct net_bridge_mdb_entry *sg_mp;
+
+		sg_mp = br_mdb_ip_get(src->br, &sg_key.addr);
+		if (!sg_mp)
+			return;
+		br_mdb_notify(src->br->dev, sg_mp, sg, RTM_NEWMDB);
+	}
+}
+
+static void br_multicast_destroy_mdb_entry(struct net_bridge_mcast_gc *gc)
+{
+	struct net_bridge_mdb_entry *mp;
+
+	mp = container_of(gc, struct net_bridge_mdb_entry, mcast_gc);
+	WARN_ON(!hlist_unhashed(&mp->mdb_node));
+	WARN_ON(mp->ports);
+
+	del_timer_sync(&mp->timer);
+	kfree_rcu(mp, rcu);
+}
+
+static void br_multicast_del_mdb_entry(struct net_bridge_mdb_entry *mp)
+{
+	struct net_bridge *br = mp->br;
+
+	rhashtable_remove_fast(&br->mdb_hash_tbl, &mp->rhnode,
+			       br_mdb_rht_params);
+	hlist_del_init_rcu(&mp->mdb_node);
+	hlist_add_head(&mp->mcast_gc.gc_node, &br->mcast_gc_list);
+	queue_work(system_long_wq, &br->mcast_gc_work);
+}
+
+static void br_multicast_group_expired(struct timer_list *t)
+{
+	struct net_bridge_mdb_entry *mp = from_timer(mp, t, timer);
+	struct net_bridge *br = mp->br;
+
+	spin_lock(&br->multicast_lock);
+	if (hlist_unhashed(&mp->mdb_node) || !netif_running(br->dev) ||
+	    timer_pending(&mp->timer))
+		goto out;
+
+	br_multicast_host_leave(mp, true);
+
+	if (mp->ports)
+		goto out;
+	br_multicast_del_mdb_entry(mp);
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_multicast_destroy_group_src(struct net_bridge_mcast_gc *gc)
+{
+	struct net_bridge_group_src *src;
+
+	src = container_of(gc, struct net_bridge_group_src, mcast_gc);
+	WARN_ON(!hlist_unhashed(&src->node));
+
+	del_timer_sync(&src->timer);
+	kfree_rcu(src, rcu);
+}
+
+void br_multicast_del_group_src(struct net_bridge_group_src *src,
+				bool fastleave)
+{
+	struct net_bridge *br = src->pg->key.port->br;
+
+	br_multicast_fwd_src_remove(src, fastleave);
+	hlist_del_init_rcu(&src->node);
+	src->pg->src_ents--;
+	hlist_add_head(&src->mcast_gc.gc_node, &br->mcast_gc_list);
+	queue_work(system_long_wq, &br->mcast_gc_work);
+}
+
+static void br_multicast_destroy_port_group(struct net_bridge_mcast_gc *gc)
+{
+	struct net_bridge_port_group *pg;
+
+	pg = container_of(gc, struct net_bridge_port_group, mcast_gc);
+	WARN_ON(!hlist_unhashed(&pg->mglist));
+	WARN_ON(!hlist_empty(&pg->src_list));
+
+	del_timer_sync(&pg->rexmit_timer);
+	del_timer_sync(&pg->timer);
+	kfree_rcu(pg, rcu);
+}
+
+void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
+			 struct net_bridge_port_group *pg,
+			 struct net_bridge_port_group __rcu **pp)
+{
+	struct net_bridge *br = pg->key.port->br;
+	struct net_bridge_group_src *ent;
+	struct hlist_node *tmp;
+
+	rcu_assign_pointer(*pp, pg->next);
+	hlist_del_init(&pg->mglist);
+	br_multicast_eht_clean_sets(pg);
+	hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
+		br_multicast_del_group_src(ent, false);
+	br_mdb_notify(br->dev, mp, pg, RTM_DELMDB);
+	if (!br_multicast_is_star_g(&mp->addr)) {
+		rhashtable_remove_fast(&br->sg_port_tbl, &pg->rhnode,
+				       br_sg_port_rht_params);
+		br_multicast_sg_del_exclude_ports(mp);
+	} else {
+		br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
+	}
+	hlist_add_head(&pg->mcast_gc.gc_node, &br->mcast_gc_list);
+	queue_work(system_long_wq, &br->mcast_gc_work);
+
+	if (!mp->ports && !mp->host_joined && netif_running(br->dev))
+		mod_timer(&mp->timer, jiffies);
+}
+
+static void br_multicast_find_del_pg(struct net_bridge *br,
+				     struct net_bridge_port_group *pg)
+{
+	struct net_bridge_port_group __rcu **pp;
+	struct net_bridge_mdb_entry *mp;
+	struct net_bridge_port_group *p;
+
+	mp = br_mdb_ip_get(br, &pg->key.addr);
+	if (WARN_ON(!mp))
+		return;
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, br)) != NULL;
+	     pp = &p->next) {
+		if (p != pg)
+			continue;
+
+		br_multicast_del_pg(mp, pg, pp);
+		return;
+	}
+
+	WARN_ON(1);
+}
+
+static void br_multicast_port_group_expired(struct timer_list *t)
+{
+	struct net_bridge_port_group *pg = from_timer(pg, t, timer);
+	struct net_bridge_group_src *src_ent;
+	struct net_bridge *br = pg->key.port->br;
+	struct hlist_node *tmp;
+	bool changed;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
+	    hlist_unhashed(&pg->mglist) || pg->flags & MDB_PG_FLAGS_PERMANENT)
+		goto out;
+
+	changed = !!(pg->filter_mode == MCAST_EXCLUDE);
+	pg->filter_mode = MCAST_INCLUDE;
+	hlist_for_each_entry_safe(src_ent, tmp, &pg->src_list, node) {
+		if (!timer_pending(&src_ent->timer)) {
+			br_multicast_del_group_src(src_ent, false);
+			changed = true;
+		}
+	}
+
+	if (hlist_empty(&pg->src_list)) {
+		br_multicast_find_del_pg(br, pg);
+	} else if (changed) {
+		struct net_bridge_mdb_entry *mp = br_mdb_ip_get(br, &pg->key.addr);
+
+		if (changed && br_multicast_is_star_g(&pg->key.addr))
+			br_multicast_star_g_handle_mode(pg, MCAST_INCLUDE);
+
+		if (WARN_ON(!mp))
+			goto out;
+		br_mdb_notify(br->dev, mp, pg, RTM_NEWMDB);
+	}
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_multicast_gc(struct hlist_head *head)
+{
+	struct net_bridge_mcast_gc *gcent;
+	struct hlist_node *tmp;
+
+	hlist_for_each_entry_safe(gcent, tmp, head, gc_node) {
+		hlist_del_init(&gcent->gc_node);
+		gcent->destroy(gcent);
+	}
+}
+
+static void __br_multicast_query_handle_vlan(struct net_bridge_mcast *brmctx,
+					     struct net_bridge_mcast_port *pmctx,
+					     struct sk_buff *skb)
+{
+	struct net_bridge_vlan *vlan = NULL;
+
+	if (pmctx && br_multicast_port_ctx_is_vlan(pmctx))
+		vlan = pmctx->vlan;
+	else if (br_multicast_ctx_is_vlan(brmctx))
+		vlan = brmctx->vlan;
+
+	if (vlan && !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED)) {
+		u16 vlan_proto;
+
+		if (br_vlan_get_proto(brmctx->br->dev, &vlan_proto) != 0)
+			return;
+		__vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan->vid);
+	}
+}
+
+static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge_mcast *brmctx,
+						    struct net_bridge_mcast_port *pmctx,
+						    struct net_bridge_port_group *pg,
+						    __be32 ip_dst, __be32 group,
+						    bool with_srcs, bool over_lmqt,
+						    u8 sflag, u8 *igmp_type,
+						    bool *need_rexmit)
+{
+	struct net_bridge_port *p = pg ? pg->key.port : NULL;
+	struct net_bridge_group_src *ent;
+	size_t pkt_size, igmp_hdr_size;
+	unsigned long now = jiffies;
+	struct igmpv3_query *ihv3;
+	void *csum_start = NULL;
+	__sum16 *csum = NULL;
+	struct sk_buff *skb;
+	struct igmphdr *ih;
+	struct ethhdr *eth;
+	unsigned long lmqt;
+	struct iphdr *iph;
+	u16 lmqt_srcs = 0;
+
+	igmp_hdr_size = sizeof(*ih);
+	if (brmctx->multicast_igmp_version == 3) {
+		igmp_hdr_size = sizeof(*ihv3);
+		if (pg && with_srcs) {
+			lmqt = now + (brmctx->multicast_last_member_interval *
+				      brmctx->multicast_last_member_count);
+			hlist_for_each_entry(ent, &pg->src_list, node) {
+				if (over_lmqt == time_after(ent->timer.expires,
+							    lmqt) &&
+				    ent->src_query_rexmit_cnt > 0)
+					lmqt_srcs++;
+			}
+
+			if (!lmqt_srcs)
+				return NULL;
+			igmp_hdr_size += lmqt_srcs * sizeof(__be32);
+		}
+	}
+
+	pkt_size = sizeof(*eth) + sizeof(*iph) + 4 + igmp_hdr_size;
+	if ((p && pkt_size > p->dev->mtu) ||
+	    pkt_size > brmctx->br->dev->mtu)
+		return NULL;
+
+	skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
+	if (!skb)
+		goto out;
+
+	__br_multicast_query_handle_vlan(brmctx, pmctx, skb);
+	skb->protocol = htons(ETH_P_IP);
+
+	skb_reset_mac_header(skb);
+	eth = eth_hdr(skb);
+
+	ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
+	ip_eth_mc_map(ip_dst, eth->h_dest);
+	eth->h_proto = htons(ETH_P_IP);
+	skb_put(skb, sizeof(*eth));
+
+	skb_set_network_header(skb, skb->len);
+	iph = ip_hdr(skb);
+	iph->tot_len = htons(pkt_size - sizeof(*eth));
+
+	iph->version = 4;
+	iph->ihl = 6;
+	iph->tos = 0xc0;
+	iph->id = 0;
+	iph->frag_off = htons(IP_DF);
+	iph->ttl = 1;
+	iph->protocol = IPPROTO_IGMP;
+	iph->saddr = br_opt_get(brmctx->br, BROPT_MULTICAST_QUERY_USE_IFADDR) ?
+		     inet_select_addr(brmctx->br->dev, 0, RT_SCOPE_LINK) : 0;
+	iph->daddr = ip_dst;
+	((u8 *)&iph[1])[0] = IPOPT_RA;
+	((u8 *)&iph[1])[1] = 4;
+	((u8 *)&iph[1])[2] = 0;
+	((u8 *)&iph[1])[3] = 0;
+	ip_send_check(iph);
+	skb_put(skb, 24);
+
+	skb_set_transport_header(skb, skb->len);
+	*igmp_type = IGMP_HOST_MEMBERSHIP_QUERY;
+
+	switch (brmctx->multicast_igmp_version) {
+	case 2:
+		ih = igmp_hdr(skb);
+		ih->type = IGMP_HOST_MEMBERSHIP_QUERY;
+		ih->code = (group ? brmctx->multicast_last_member_interval :
+				    brmctx->multicast_query_response_interval) /
+			   (HZ / IGMP_TIMER_SCALE);
+		ih->group = group;
+		ih->csum = 0;
+		csum = &ih->csum;
+		csum_start = (void *)ih;
+		break;
+	case 3:
+		ihv3 = igmpv3_query_hdr(skb);
+		ihv3->type = IGMP_HOST_MEMBERSHIP_QUERY;
+		ihv3->code = (group ? brmctx->multicast_last_member_interval :
+				      brmctx->multicast_query_response_interval) /
+			     (HZ / IGMP_TIMER_SCALE);
+		ihv3->group = group;
+		ihv3->qqic = brmctx->multicast_query_interval / HZ;
+		ihv3->nsrcs = htons(lmqt_srcs);
+		ihv3->resv = 0;
+		ihv3->suppress = sflag;
+		ihv3->qrv = 2;
+		ihv3->csum = 0;
+		csum = &ihv3->csum;
+		csum_start = (void *)ihv3;
+		if (!pg || !with_srcs)
+			break;
+
+		lmqt_srcs = 0;
+		hlist_for_each_entry(ent, &pg->src_list, node) {
+			if (over_lmqt == time_after(ent->timer.expires,
+						    lmqt) &&
+			    ent->src_query_rexmit_cnt > 0) {
+				ihv3->srcs[lmqt_srcs++] = ent->addr.src.ip4;
+				ent->src_query_rexmit_cnt--;
+				if (need_rexmit && ent->src_query_rexmit_cnt)
+					*need_rexmit = true;
+			}
+		}
+		if (WARN_ON(lmqt_srcs != ntohs(ihv3->nsrcs))) {
+			kfree_skb(skb);
+			return NULL;
+		}
+		break;
+	}
+
+	if (WARN_ON(!csum || !csum_start)) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	*csum = ip_compute_csum(csum_start, igmp_hdr_size);
+	skb_put(skb, igmp_hdr_size);
+	__skb_pull(skb, sizeof(*eth));
+
+out:
+	return skb;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge_mcast *brmctx,
+						    struct net_bridge_mcast_port *pmctx,
+						    struct net_bridge_port_group *pg,
+						    const struct in6_addr *ip6_dst,
+						    const struct in6_addr *group,
+						    bool with_srcs, bool over_llqt,
+						    u8 sflag, u8 *igmp_type,
+						    bool *need_rexmit)
+{
+	struct net_bridge_port *p = pg ? pg->key.port : NULL;
+	struct net_bridge_group_src *ent;
+	size_t pkt_size, mld_hdr_size;
+	unsigned long now = jiffies;
+	struct mld2_query *mld2q;
+	void *csum_start = NULL;
+	unsigned long interval;
+	__sum16 *csum = NULL;
+	struct ipv6hdr *ip6h;
+	struct mld_msg *mldq;
+	struct sk_buff *skb;
+	unsigned long llqt;
+	struct ethhdr *eth;
+	u16 llqt_srcs = 0;
+	u8 *hopopt;
+
+	mld_hdr_size = sizeof(*mldq);
+	if (brmctx->multicast_mld_version == 2) {
+		mld_hdr_size = sizeof(*mld2q);
+		if (pg && with_srcs) {
+			llqt = now + (brmctx->multicast_last_member_interval *
+				      brmctx->multicast_last_member_count);
+			hlist_for_each_entry(ent, &pg->src_list, node) {
+				if (over_llqt == time_after(ent->timer.expires,
+							    llqt) &&
+				    ent->src_query_rexmit_cnt > 0)
+					llqt_srcs++;
+			}
+
+			if (!llqt_srcs)
+				return NULL;
+			mld_hdr_size += llqt_srcs * sizeof(struct in6_addr);
+		}
+	}
+
+	pkt_size = sizeof(*eth) + sizeof(*ip6h) + 8 + mld_hdr_size;
+	if ((p && pkt_size > p->dev->mtu) ||
+	    pkt_size > brmctx->br->dev->mtu)
+		return NULL;
+
+	skb = netdev_alloc_skb_ip_align(brmctx->br->dev, pkt_size);
+	if (!skb)
+		goto out;
+
+	__br_multicast_query_handle_vlan(brmctx, pmctx, skb);
+	skb->protocol = htons(ETH_P_IPV6);
+
+	/* Ethernet header */
+	skb_reset_mac_header(skb);
+	eth = eth_hdr(skb);
+
+	ether_addr_copy(eth->h_source, brmctx->br->dev->dev_addr);
+	eth->h_proto = htons(ETH_P_IPV6);
+	skb_put(skb, sizeof(*eth));
+
+	/* IPv6 header + HbH option */
+	skb_set_network_header(skb, skb->len);
+	ip6h = ipv6_hdr(skb);
+
+	*(__force __be32 *)ip6h = htonl(0x60000000);
+	ip6h->payload_len = htons(8 + mld_hdr_size);
+	ip6h->nexthdr = IPPROTO_HOPOPTS;
+	ip6h->hop_limit = 1;
+	ip6h->daddr = *ip6_dst;
+	if (ipv6_dev_get_saddr(dev_net(brmctx->br->dev), brmctx->br->dev,
+			       &ip6h->daddr, 0, &ip6h->saddr)) {
+		kfree_skb(skb);
+		br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false);
+		return NULL;
+	}
+
+	br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true);
+	ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest);
+
+	hopopt = (u8 *)(ip6h + 1);
+	hopopt[0] = IPPROTO_ICMPV6;		/* next hdr */
+	hopopt[1] = 0;				/* length of HbH */
+	hopopt[2] = IPV6_TLV_ROUTERALERT;	/* Router Alert */
+	hopopt[3] = 2;				/* Length of RA Option */
+	hopopt[4] = 0;				/* Type = 0x0000 (MLD) */
+	hopopt[5] = 0;
+	hopopt[6] = IPV6_TLV_PAD1;		/* Pad1 */
+	hopopt[7] = IPV6_TLV_PAD1;		/* Pad1 */
+
+	skb_put(skb, sizeof(*ip6h) + 8);
+
+	/* ICMPv6 */
+	skb_set_transport_header(skb, skb->len);
+	interval = ipv6_addr_any(group) ?
+			brmctx->multicast_query_response_interval :
+			brmctx->multicast_last_member_interval;
+	*igmp_type = ICMPV6_MGM_QUERY;
+	switch (brmctx->multicast_mld_version) {
+	case 1:
+		mldq = (struct mld_msg *)icmp6_hdr(skb);
+		mldq->mld_type = ICMPV6_MGM_QUERY;
+		mldq->mld_code = 0;
+		mldq->mld_cksum = 0;
+		mldq->mld_maxdelay = htons((u16)jiffies_to_msecs(interval));
+		mldq->mld_reserved = 0;
+		mldq->mld_mca = *group;
+		csum = &mldq->mld_cksum;
+		csum_start = (void *)mldq;
+		break;
+	case 2:
+		mld2q = (struct mld2_query *)icmp6_hdr(skb);
+		mld2q->mld2q_mrc = htons((u16)jiffies_to_msecs(interval));
+		mld2q->mld2q_type = ICMPV6_MGM_QUERY;
+		mld2q->mld2q_code = 0;
+		mld2q->mld2q_cksum = 0;
+		mld2q->mld2q_resv1 = 0;
+		mld2q->mld2q_resv2 = 0;
+		mld2q->mld2q_suppress = sflag;
+		mld2q->mld2q_qrv = 2;
+		mld2q->mld2q_nsrcs = htons(llqt_srcs);
+		mld2q->mld2q_qqic = brmctx->multicast_query_interval / HZ;
+		mld2q->mld2q_mca = *group;
+		csum = &mld2q->mld2q_cksum;
+		csum_start = (void *)mld2q;
+		if (!pg || !with_srcs)
+			break;
+
+		llqt_srcs = 0;
+		hlist_for_each_entry(ent, &pg->src_list, node) {
+			if (over_llqt == time_after(ent->timer.expires,
+						    llqt) &&
+			    ent->src_query_rexmit_cnt > 0) {
+				mld2q->mld2q_srcs[llqt_srcs++] = ent->addr.src.ip6;
+				ent->src_query_rexmit_cnt--;
+				if (need_rexmit && ent->src_query_rexmit_cnt)
+					*need_rexmit = true;
+			}
+		}
+		if (WARN_ON(llqt_srcs != ntohs(mld2q->mld2q_nsrcs))) {
+			kfree_skb(skb);
+			return NULL;
+		}
+		break;
+	}
+
+	if (WARN_ON(!csum || !csum_start)) {
+		kfree_skb(skb);
+		return NULL;
+	}
+
+	*csum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, mld_hdr_size,
+				IPPROTO_ICMPV6,
+				csum_partial(csum_start, mld_hdr_size, 0));
+	skb_put(skb, mld_hdr_size);
+	__skb_pull(skb, sizeof(*eth));
+
+out:
+	return skb;
+}
+#endif
+
+static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx,
+						struct net_bridge_mcast_port *pmctx,
+						struct net_bridge_port_group *pg,
+						struct br_ip *ip_dst,
+						struct br_ip *group,
+						bool with_srcs, bool over_lmqt,
+						u8 sflag, u8 *igmp_type,
+						bool *need_rexmit)
+{
+	__be32 ip4_dst;
+
+	switch (group->proto) {
+	case htons(ETH_P_IP):
+		ip4_dst = ip_dst ? ip_dst->dst.ip4 : htonl(INADDR_ALLHOSTS_GROUP);
+		return br_ip4_multicast_alloc_query(brmctx, pmctx, pg,
+						    ip4_dst, group->dst.ip4,
+						    with_srcs, over_lmqt,
+						    sflag, igmp_type,
+						    need_rexmit);
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6): {
+		struct in6_addr ip6_dst;
+
+		if (ip_dst)
+			ip6_dst = ip_dst->dst.ip6;
+		else
+			ipv6_addr_set(&ip6_dst, htonl(0xff020000), 0, 0,
+				      htonl(1));
+
+		return br_ip6_multicast_alloc_query(brmctx, pmctx, pg,
+						    &ip6_dst, &group->dst.ip6,
+						    with_srcs, over_lmqt,
+						    sflag, igmp_type,
+						    need_rexmit);
+	}
+#endif
+	}
+	return NULL;
+}
+
+struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
+						    struct br_ip *group)
+{
+	struct net_bridge_mdb_entry *mp;
+	int err;
+
+	mp = br_mdb_ip_get(br, group);
+	if (mp)
+		return mp;
+
+	if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) {
+		br_mc_disabled_update(br->dev, false, NULL);
+		br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false);
+		return ERR_PTR(-E2BIG);
+	}
+
+	mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
+	if (unlikely(!mp))
+		return ERR_PTR(-ENOMEM);
+
+	mp->br = br;
+	mp->addr = *group;
+	mp->mcast_gc.destroy = br_multicast_destroy_mdb_entry;
+	timer_setup(&mp->timer, br_multicast_group_expired, 0);
+	err = rhashtable_lookup_insert_fast(&br->mdb_hash_tbl, &mp->rhnode,
+					    br_mdb_rht_params);
+	if (err) {
+		kfree(mp);
+		mp = ERR_PTR(err);
+	} else {
+		hlist_add_head_rcu(&mp->mdb_node, &br->mdb_list);
+	}
+
+	return mp;
+}
+
+static void br_multicast_group_src_expired(struct timer_list *t)
+{
+	struct net_bridge_group_src *src = from_timer(src, t, timer);
+	struct net_bridge_port_group *pg;
+	struct net_bridge *br = src->br;
+
+	spin_lock(&br->multicast_lock);
+	if (hlist_unhashed(&src->node) || !netif_running(br->dev) ||
+	    timer_pending(&src->timer))
+		goto out;
+
+	pg = src->pg;
+	if (pg->filter_mode == MCAST_INCLUDE) {
+		br_multicast_del_group_src(src, false);
+		if (!hlist_empty(&pg->src_list))
+			goto out;
+		br_multicast_find_del_pg(br, pg);
+	} else {
+		br_multicast_fwd_src_handle(src);
+	}
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+struct net_bridge_group_src *
+br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip)
+{
+	struct net_bridge_group_src *ent;
+
+	switch (ip->proto) {
+	case htons(ETH_P_IP):
+		hlist_for_each_entry(ent, &pg->src_list, node)
+			if (ip->src.ip4 == ent->addr.src.ip4)
+				return ent;
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		hlist_for_each_entry(ent, &pg->src_list, node)
+			if (!ipv6_addr_cmp(&ent->addr.src.ip6, &ip->src.ip6))
+				return ent;
+		break;
+#endif
+	}
+
+	return NULL;
+}
+
+static struct net_bridge_group_src *
+br_multicast_new_group_src(struct net_bridge_port_group *pg, struct br_ip *src_ip)
+{
+	struct net_bridge_group_src *grp_src;
+
+	if (unlikely(pg->src_ents >= PG_SRC_ENT_LIMIT))
+		return NULL;
+
+	switch (src_ip->proto) {
+	case htons(ETH_P_IP):
+		if (ipv4_is_zeronet(src_ip->src.ip4) ||
+		    ipv4_is_multicast(src_ip->src.ip4))
+			return NULL;
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		if (ipv6_addr_any(&src_ip->src.ip6) ||
+		    ipv6_addr_is_multicast(&src_ip->src.ip6))
+			return NULL;
+		break;
+#endif
+	}
+
+	grp_src = kzalloc(sizeof(*grp_src), GFP_ATOMIC);
+	if (unlikely(!grp_src))
+		return NULL;
+
+	grp_src->pg = pg;
+	grp_src->br = pg->key.port->br;
+	grp_src->addr = *src_ip;
+	grp_src->mcast_gc.destroy = br_multicast_destroy_group_src;
+	timer_setup(&grp_src->timer, br_multicast_group_src_expired, 0);
+
+	hlist_add_head_rcu(&grp_src->node, &pg->src_list);
+	pg->src_ents++;
+
+	return grp_src;
+}
+
+struct net_bridge_port_group *br_multicast_new_port_group(
+			struct net_bridge_port *port,
+			struct br_ip *group,
+			struct net_bridge_port_group __rcu *next,
+			unsigned char flags,
+			const unsigned char *src,
+			u8 filter_mode,
+			u8 rt_protocol)
+{
+	struct net_bridge_port_group *p;
+
+	p = kzalloc(sizeof(*p), GFP_ATOMIC);
+	if (unlikely(!p))
+		return NULL;
+
+	p->key.addr = *group;
+	p->key.port = port;
+	p->flags = flags;
+	p->filter_mode = filter_mode;
+	p->rt_protocol = rt_protocol;
+	p->eht_host_tree = RB_ROOT;
+	p->eht_set_tree = RB_ROOT;
+	p->mcast_gc.destroy = br_multicast_destroy_port_group;
+	INIT_HLIST_HEAD(&p->src_list);
+
+	if (!br_multicast_is_star_g(group) &&
+	    rhashtable_lookup_insert_fast(&port->br->sg_port_tbl, &p->rhnode,
+					  br_sg_port_rht_params)) {
+		kfree(p);
+		return NULL;
+	}
+
+	rcu_assign_pointer(p->next, next);
+	timer_setup(&p->timer, br_multicast_port_group_expired, 0);
+	timer_setup(&p->rexmit_timer, br_multicast_port_group_rexmit, 0);
+	hlist_add_head(&p->mglist, &port->mglist);
+
+	if (src)
+		memcpy(p->eth_addr, src, ETH_ALEN);
+	else
+		eth_broadcast_addr(p->eth_addr);
+
+	return p;
+}
+
+void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
+			    struct net_bridge_mdb_entry *mp, bool notify)
+{
+	if (!mp->host_joined) {
+		mp->host_joined = true;
+		if (br_multicast_is_star_g(&mp->addr))
+			br_multicast_star_g_host_state(mp);
+		if (notify)
+			br_mdb_notify(mp->br->dev, mp, NULL, RTM_NEWMDB);
+	}
+
+	if (br_group_is_l2(&mp->addr))
+		return;
+
+	mod_timer(&mp->timer, jiffies + brmctx->multicast_membership_interval);
+}
+
+void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify)
+{
+	if (!mp->host_joined)
+		return;
+
+	mp->host_joined = false;
+	if (br_multicast_is_star_g(&mp->addr))
+		br_multicast_star_g_host_state(mp);
+	if (notify)
+		br_mdb_notify(mp->br->dev, mp, NULL, RTM_DELMDB);
+}
+
+static struct net_bridge_port_group *
+__br_multicast_add_group(struct net_bridge_mcast *brmctx,
+			 struct net_bridge_mcast_port *pmctx,
+			 struct br_ip *group,
+			 const unsigned char *src,
+			 u8 filter_mode,
+			 bool igmpv2_mldv1,
+			 bool blocked)
+{
+	struct net_bridge_port_group __rcu **pp;
+	struct net_bridge_port_group *p = NULL;
+	struct net_bridge_mdb_entry *mp;
+	unsigned long now = jiffies;
+
+	if (!br_multicast_ctx_should_use(brmctx, pmctx))
+		goto out;
+
+	mp = br_multicast_new_group(brmctx->br, group);
+	if (IS_ERR(mp))
+		return ERR_CAST(mp);
+
+	if (!pmctx) {
+		br_multicast_host_join(brmctx, mp, true);
+		goto out;
+	}
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, brmctx->br)) != NULL;
+	     pp = &p->next) {
+		if (br_port_group_equal(p, pmctx->port, src))
+			goto found;
+		if ((unsigned long)p->key.port < (unsigned long)pmctx->port)
+			break;
+	}
+
+	p = br_multicast_new_port_group(pmctx->port, group, *pp, 0, src,
+					filter_mode, RTPROT_KERNEL);
+	if (unlikely(!p)) {
+		p = ERR_PTR(-ENOMEM);
+		goto out;
+	}
+	rcu_assign_pointer(*pp, p);
+	if (blocked)
+		p->flags |= MDB_PG_FLAGS_BLOCKED;
+	br_mdb_notify(brmctx->br->dev, mp, p, RTM_NEWMDB);
+
+found:
+	if (igmpv2_mldv1)
+		mod_timer(&p->timer,
+			  now + brmctx->multicast_membership_interval);
+
+out:
+	return p;
+}
+
+static int br_multicast_add_group(struct net_bridge_mcast *brmctx,
+				  struct net_bridge_mcast_port *pmctx,
+				  struct br_ip *group,
+				  const unsigned char *src,
+				  u8 filter_mode,
+				  bool igmpv2_mldv1)
+{
+	struct net_bridge_port_group *pg;
+	int err;
+
+	spin_lock(&brmctx->br->multicast_lock);
+	pg = __br_multicast_add_group(brmctx, pmctx, group, src, filter_mode,
+				      igmpv2_mldv1, false);
+	/* NULL is considered valid for host joined groups */
+	err = PTR_ERR_OR_ZERO(pg);
+	spin_unlock(&brmctx->br->multicast_lock);
+
+	return err;
+}
+
+static int br_ip4_multicast_add_group(struct net_bridge_mcast *brmctx,
+				      struct net_bridge_mcast_port *pmctx,
+				      __be32 group,
+				      __u16 vid,
+				      const unsigned char *src,
+				      bool igmpv2)
+{
+	struct br_ip br_group;
+	u8 filter_mode;
+
+	if (ipv4_is_local_multicast(group))
+		return 0;
+
+	memset(&br_group, 0, sizeof(br_group));
+	br_group.dst.ip4 = group;
+	br_group.proto = htons(ETH_P_IP);
+	br_group.vid = vid;
+	filter_mode = igmpv2 ? MCAST_EXCLUDE : MCAST_INCLUDE;
+
+	return br_multicast_add_group(brmctx, pmctx, &br_group, src,
+				      filter_mode, igmpv2);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int br_ip6_multicast_add_group(struct net_bridge_mcast *brmctx,
+				      struct net_bridge_mcast_port *pmctx,
+				      const struct in6_addr *group,
+				      __u16 vid,
+				      const unsigned char *src,
+				      bool mldv1)
+{
+	struct br_ip br_group;
+	u8 filter_mode;
+
+	if (ipv6_addr_is_ll_all_nodes(group))
+		return 0;
+
+	memset(&br_group, 0, sizeof(br_group));
+	br_group.dst.ip6 = *group;
+	br_group.proto = htons(ETH_P_IPV6);
+	br_group.vid = vid;
+	filter_mode = mldv1 ? MCAST_EXCLUDE : MCAST_INCLUDE;
+
+	return br_multicast_add_group(brmctx, pmctx, &br_group, src,
+				      filter_mode, mldv1);
+}
+#endif
+
+static bool br_multicast_rport_del(struct hlist_node *rlist)
+{
+	if (hlist_unhashed(rlist))
+		return false;
+
+	hlist_del_init_rcu(rlist);
+	return true;
+}
+
+static bool br_ip4_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
+{
+	return br_multicast_rport_del(&pmctx->ip4_rlist);
+}
+
+static bool br_ip6_multicast_rport_del(struct net_bridge_mcast_port *pmctx)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	return br_multicast_rport_del(&pmctx->ip6_rlist);
+#else
+	return false;
+#endif
+}
+
+static void br_multicast_router_expired(struct net_bridge_mcast_port *pmctx,
+					struct timer_list *t,
+					struct hlist_node *rlist)
+{
+	struct net_bridge *br = pmctx->port->br;
+	bool del;
+
+	spin_lock(&br->multicast_lock);
+	if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
+	    pmctx->multicast_router == MDB_RTR_TYPE_PERM ||
+	    timer_pending(t))
+		goto out;
+
+	del = br_multicast_rport_del(rlist);
+	br_multicast_rport_del_notify(pmctx, del);
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_ip4_multicast_router_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
+							 ip4_mc_router_timer);
+
+	br_multicast_router_expired(pmctx, t, &pmctx->ip4_rlist);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_router_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
+							 ip6_mc_router_timer);
+
+	br_multicast_router_expired(pmctx, t, &pmctx->ip6_rlist);
+}
+#endif
+
+static void br_mc_router_state_change(struct net_bridge *p,
+				      bool is_mc_router)
+{
+	struct switchdev_attr attr = {
+		.orig_dev = p->dev,
+		.id = SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
+		.flags = SWITCHDEV_F_DEFER,
+		.u.mrouter = is_mc_router,
+	};
+
+	switchdev_port_attr_set(p->dev, &attr, NULL);
+}
+
+static void br_multicast_local_router_expired(struct net_bridge_mcast *brmctx,
+					      struct timer_list *timer)
+{
+	spin_lock(&brmctx->br->multicast_lock);
+	if (brmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
+	    brmctx->multicast_router == MDB_RTR_TYPE_PERM ||
+	    br_ip4_multicast_is_router(brmctx) ||
+	    br_ip6_multicast_is_router(brmctx))
+		goto out;
+
+	br_mc_router_state_change(brmctx->br, false);
+out:
+	spin_unlock(&brmctx->br->multicast_lock);
+}
+
+static void br_ip4_multicast_local_router_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
+						     ip4_mc_router_timer);
+
+	br_multicast_local_router_expired(brmctx, t);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_local_router_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
+						     ip6_mc_router_timer);
+
+	br_multicast_local_router_expired(brmctx, t);
+}
+#endif
+
+static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx,
+					 struct bridge_mcast_own_query *query)
+{
+	spin_lock(&brmctx->br->multicast_lock);
+	if (!netif_running(brmctx->br->dev) ||
+	    br_multicast_ctx_vlan_global_disabled(brmctx) ||
+	    !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
+		goto out;
+
+	br_multicast_start_querier(brmctx, query);
+
+out:
+	spin_unlock(&brmctx->br->multicast_lock);
+}
+
+static void br_ip4_multicast_querier_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
+						     ip4_other_query.timer);
+
+	br_multicast_querier_expired(brmctx, &brmctx->ip4_own_query);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_querier_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
+						     ip6_other_query.timer);
+
+	br_multicast_querier_expired(brmctx, &brmctx->ip6_own_query);
+}
+#endif
+
+static void br_multicast_select_own_querier(struct net_bridge_mcast *brmctx,
+					    struct br_ip *ip,
+					    struct sk_buff *skb)
+{
+	if (ip->proto == htons(ETH_P_IP))
+		brmctx->ip4_querier.addr.src.ip4 = ip_hdr(skb)->saddr;
+#if IS_ENABLED(CONFIG_IPV6)
+	else
+		brmctx->ip6_querier.addr.src.ip6 = ipv6_hdr(skb)->saddr;
+#endif
+}
+
+static void __br_multicast_send_query(struct net_bridge_mcast *brmctx,
+				      struct net_bridge_mcast_port *pmctx,
+				      struct net_bridge_port_group *pg,
+				      struct br_ip *ip_dst,
+				      struct br_ip *group,
+				      bool with_srcs,
+				      u8 sflag,
+				      bool *need_rexmit)
+{
+	bool over_lmqt = !!sflag;
+	struct sk_buff *skb;
+	u8 igmp_type;
+
+	if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
+	    !br_multicast_ctx_matches_vlan_snooping(brmctx))
+		return;
+
+again_under_lmqt:
+	skb = br_multicast_alloc_query(brmctx, pmctx, pg, ip_dst, group,
+				       with_srcs, over_lmqt, sflag, &igmp_type,
+				       need_rexmit);
+	if (!skb)
+		return;
+
+	if (pmctx) {
+		skb->dev = pmctx->port->dev;
+		br_multicast_count(brmctx->br, pmctx->port, skb, igmp_type,
+				   BR_MCAST_DIR_TX);
+		NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
+			dev_net(pmctx->port->dev), NULL, skb, NULL, skb->dev,
+			br_dev_queue_push_xmit);
+
+		if (over_lmqt && with_srcs && sflag) {
+			over_lmqt = false;
+			goto again_under_lmqt;
+		}
+	} else {
+		br_multicast_select_own_querier(brmctx, group, skb);
+		br_multicast_count(brmctx->br, NULL, skb, igmp_type,
+				   BR_MCAST_DIR_RX);
+		netif_rx(skb);
+	}
+}
+
+static void br_multicast_read_querier(const struct bridge_mcast_querier *querier,
+				      struct bridge_mcast_querier *dest)
+{
+	unsigned int seq;
+
+	memset(dest, 0, sizeof(*dest));
+	do {
+		seq = read_seqcount_begin(&querier->seq);
+		dest->port_ifidx = querier->port_ifidx;
+		memcpy(&dest->addr, &querier->addr, sizeof(struct br_ip));
+	} while (read_seqcount_retry(&querier->seq, seq));
+}
+
+static void br_multicast_update_querier(struct net_bridge_mcast *brmctx,
+					struct bridge_mcast_querier *querier,
+					int ifindex,
+					struct br_ip *saddr)
+{
+	write_seqcount_begin(&querier->seq);
+	querier->port_ifidx = ifindex;
+	memcpy(&querier->addr, saddr, sizeof(*saddr));
+	write_seqcount_end(&querier->seq);
+}
+
+static void br_multicast_send_query(struct net_bridge_mcast *brmctx,
+				    struct net_bridge_mcast_port *pmctx,
+				    struct bridge_mcast_own_query *own_query)
+{
+	struct bridge_mcast_other_query *other_query = NULL;
+	struct bridge_mcast_querier *querier;
+	struct br_ip br_group;
+	unsigned long time;
+
+	if (!br_multicast_ctx_should_use(brmctx, pmctx) ||
+	    !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
+	    !brmctx->multicast_querier)
+		return;
+
+	memset(&br_group.dst, 0, sizeof(br_group.dst));
+
+	if (pmctx ? (own_query == &pmctx->ip4_own_query) :
+		    (own_query == &brmctx->ip4_own_query)) {
+		querier = &brmctx->ip4_querier;
+		other_query = &brmctx->ip4_other_query;
+		br_group.proto = htons(ETH_P_IP);
+#if IS_ENABLED(CONFIG_IPV6)
+	} else {
+		querier = &brmctx->ip6_querier;
+		other_query = &brmctx->ip6_other_query;
+		br_group.proto = htons(ETH_P_IPV6);
+#endif
+	}
+
+	if (!other_query || timer_pending(&other_query->timer))
+		return;
+
+	/* we're about to select ourselves as querier */
+	if (!pmctx && querier->port_ifidx) {
+		struct br_ip zeroip = {};
+
+		br_multicast_update_querier(brmctx, querier, 0, &zeroip);
+	}
+
+	__br_multicast_send_query(brmctx, pmctx, NULL, NULL, &br_group, false,
+				  0, NULL);
+
+	time = jiffies;
+	time += own_query->startup_sent < brmctx->multicast_startup_query_count ?
+		brmctx->multicast_startup_query_interval :
+		brmctx->multicast_query_interval;
+	mod_timer(&own_query->timer, time);
+}
+
+static void
+br_multicast_port_query_expired(struct net_bridge_mcast_port *pmctx,
+				struct bridge_mcast_own_query *query)
+{
+	struct net_bridge *br = pmctx->port->br;
+	struct net_bridge_mcast *brmctx;
+
+	spin_lock(&br->multicast_lock);
+	if (br_multicast_port_ctx_state_stopped(pmctx))
+		goto out;
+
+	brmctx = br_multicast_port_ctx_get_global(pmctx);
+	if (query->startup_sent < brmctx->multicast_startup_query_count)
+		query->startup_sent++;
+
+	br_multicast_send_query(brmctx, pmctx, query);
+
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static void br_ip4_multicast_port_query_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
+							 ip4_own_query.timer);
+
+	br_multicast_port_query_expired(pmctx, &pmctx->ip4_own_query);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_port_query_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast_port *pmctx = from_timer(pmctx, t,
+							 ip6_own_query.timer);
+
+	br_multicast_port_query_expired(pmctx, &pmctx->ip6_own_query);
+}
+#endif
+
+static void br_multicast_port_group_rexmit(struct timer_list *t)
+{
+	struct net_bridge_port_group *pg = from_timer(pg, t, rexmit_timer);
+	struct bridge_mcast_other_query *other_query = NULL;
+	struct net_bridge *br = pg->key.port->br;
+	struct net_bridge_mcast_port *pmctx;
+	struct net_bridge_mcast *brmctx;
+	bool need_rexmit = false;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) || hlist_unhashed(&pg->mglist) ||
+	    !br_opt_get(br, BROPT_MULTICAST_ENABLED))
+		goto out;
+
+	pmctx = br_multicast_pg_to_port_ctx(pg);
+	if (!pmctx)
+		goto out;
+	brmctx = br_multicast_port_ctx_get_global(pmctx);
+	if (!brmctx->multicast_querier)
+		goto out;
+
+	if (pg->key.addr.proto == htons(ETH_P_IP))
+		other_query = &brmctx->ip4_other_query;
+#if IS_ENABLED(CONFIG_IPV6)
+	else
+		other_query = &brmctx->ip6_other_query;
+#endif
+
+	if (!other_query || timer_pending(&other_query->timer))
+		goto out;
+
+	if (pg->grp_query_rexmit_cnt) {
+		pg->grp_query_rexmit_cnt--;
+		__br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
+					  &pg->key.addr, false, 1, NULL);
+	}
+	__br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
+				  &pg->key.addr, true, 0, &need_rexmit);
+
+	if (pg->grp_query_rexmit_cnt || need_rexmit)
+		mod_timer(&pg->rexmit_timer, jiffies +
+					     brmctx->multicast_last_member_interval);
+out:
+	spin_unlock(&br->multicast_lock);
+}
+
+static int br_mc_disabled_update(struct net_device *dev, bool value,
+				 struct netlink_ext_ack *extack)
+{
+	struct switchdev_attr attr = {
+		.orig_dev = dev,
+		.id = SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
+		.flags = SWITCHDEV_F_DEFER,
+		.u.mc_disabled = !value,
+	};
+
+	return switchdev_port_attr_set(dev, &attr, extack);
+}
+
+void br_multicast_port_ctx_init(struct net_bridge_port *port,
+				struct net_bridge_vlan *vlan,
+				struct net_bridge_mcast_port *pmctx)
+{
+	pmctx->port = port;
+	pmctx->vlan = vlan;
+	pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
+	timer_setup(&pmctx->ip4_mc_router_timer,
+		    br_ip4_multicast_router_expired, 0);
+	timer_setup(&pmctx->ip4_own_query.timer,
+		    br_ip4_multicast_port_query_expired, 0);
+#if IS_ENABLED(CONFIG_IPV6)
+	timer_setup(&pmctx->ip6_mc_router_timer,
+		    br_ip6_multicast_router_expired, 0);
+	timer_setup(&pmctx->ip6_own_query.timer,
+		    br_ip6_multicast_port_query_expired, 0);
+#endif
+}
+
+void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	del_timer_sync(&pmctx->ip6_mc_router_timer);
+#endif
+	del_timer_sync(&pmctx->ip4_mc_router_timer);
+}
+
+int br_multicast_add_port(struct net_bridge_port *port)
+{
+	int err;
+
+	port->multicast_eht_hosts_limit = BR_MCAST_DEFAULT_EHT_HOSTS_LIMIT;
+	br_multicast_port_ctx_init(port, NULL, &port->multicast_ctx);
+
+	err = br_mc_disabled_update(port->dev,
+				    br_opt_get(port->br,
+					       BROPT_MULTICAST_ENABLED),
+				    NULL);
+	if (err && err != -EOPNOTSUPP)
+		return err;
+
+	port->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
+	if (!port->mcast_stats)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void br_multicast_del_port(struct net_bridge_port *port)
+{
+	struct net_bridge *br = port->br;
+	struct net_bridge_port_group *pg;
+	HLIST_HEAD(deleted_head);
+	struct hlist_node *n;
+
+	/* Take care of the remaining groups, only perm ones should be left */
+	spin_lock_bh(&br->multicast_lock);
+	hlist_for_each_entry_safe(pg, n, &port->mglist, mglist)
+		br_multicast_find_del_pg(br, pg);
+	hlist_move_list(&br->mcast_gc_list, &deleted_head);
+	spin_unlock_bh(&br->multicast_lock);
+	br_multicast_gc(&deleted_head);
+	br_multicast_port_ctx_deinit(&port->multicast_ctx);
+	free_percpu(port->mcast_stats);
+}
+
+static void br_multicast_enable(struct bridge_mcast_own_query *query)
+{
+	query->startup_sent = 0;
+
+	if (try_to_del_timer_sync(&query->timer) >= 0 ||
+	    del_timer(&query->timer))
+		mod_timer(&query->timer, jiffies);
+}
+
+static void __br_multicast_enable_port_ctx(struct net_bridge_mcast_port *pmctx)
+{
+	struct net_bridge *br = pmctx->port->br;
+	struct net_bridge_mcast *brmctx;
+
+	brmctx = br_multicast_port_ctx_get_global(pmctx);
+	if (!br_opt_get(br, BROPT_MULTICAST_ENABLED) ||
+	    !netif_running(br->dev))
+		return;
+
+	br_multicast_enable(&pmctx->ip4_own_query);
+#if IS_ENABLED(CONFIG_IPV6)
+	br_multicast_enable(&pmctx->ip6_own_query);
+#endif
+	if (pmctx->multicast_router == MDB_RTR_TYPE_PERM) {
+		br_ip4_multicast_add_router(brmctx, pmctx);
+		br_ip6_multicast_add_router(brmctx, pmctx);
+	}
+}
+
+void br_multicast_enable_port(struct net_bridge_port *port)
+{
+	struct net_bridge *br = port->br;
+
+	spin_lock_bh(&br->multicast_lock);
+	__br_multicast_enable_port_ctx(&port->multicast_ctx);
+	spin_unlock_bh(&br->multicast_lock);
+}
+
+static void __br_multicast_disable_port_ctx(struct net_bridge_mcast_port *pmctx)
+{
+	struct net_bridge_port_group *pg;
+	struct hlist_node *n;
+	bool del = false;
+
+	hlist_for_each_entry_safe(pg, n, &pmctx->port->mglist, mglist)
+		if (!(pg->flags & MDB_PG_FLAGS_PERMANENT) &&
+		    (!br_multicast_port_ctx_is_vlan(pmctx) ||
+		     pg->key.addr.vid == pmctx->vlan->vid))
+			br_multicast_find_del_pg(pmctx->port->br, pg);
+
+	del |= br_ip4_multicast_rport_del(pmctx);
+	del_timer(&pmctx->ip4_mc_router_timer);
+	del_timer(&pmctx->ip4_own_query.timer);
+	del |= br_ip6_multicast_rport_del(pmctx);
+#if IS_ENABLED(CONFIG_IPV6)
+	del_timer(&pmctx->ip6_mc_router_timer);
+	del_timer(&pmctx->ip6_own_query.timer);
+#endif
+	br_multicast_rport_del_notify(pmctx, del);
+}
+
+void br_multicast_disable_port(struct net_bridge_port *port)
+{
+	spin_lock_bh(&port->br->multicast_lock);
+	__br_multicast_disable_port_ctx(&port->multicast_ctx);
+	spin_unlock_bh(&port->br->multicast_lock);
+}
+
+static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
+{
+	struct net_bridge_group_src *ent;
+	struct hlist_node *tmp;
+	int deleted = 0;
+
+	hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node)
+		if (ent->flags & BR_SGRP_F_DELETE) {
+			br_multicast_del_group_src(ent, false);
+			deleted++;
+		}
+
+	return deleted;
+}
+
+static void __grp_src_mod_timer(struct net_bridge_group_src *src,
+				unsigned long expires)
+{
+	mod_timer(&src->timer, expires);
+	br_multicast_fwd_src_handle(src);
+}
+
+static void __grp_src_query_marked_and_rexmit(struct net_bridge_mcast *brmctx,
+					      struct net_bridge_mcast_port *pmctx,
+					      struct net_bridge_port_group *pg)
+{
+	struct bridge_mcast_other_query *other_query = NULL;
+	u32 lmqc = brmctx->multicast_last_member_count;
+	unsigned long lmqt, lmi, now = jiffies;
+	struct net_bridge_group_src *ent;
+
+	if (!netif_running(brmctx->br->dev) ||
+	    !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
+		return;
+
+	if (pg->key.addr.proto == htons(ETH_P_IP))
+		other_query = &brmctx->ip4_other_query;
+#if IS_ENABLED(CONFIG_IPV6)
+	else
+		other_query = &brmctx->ip6_other_query;
+#endif
+
+	lmqt = now + br_multicast_lmqt(brmctx);
+	hlist_for_each_entry(ent, &pg->src_list, node) {
+		if (ent->flags & BR_SGRP_F_SEND) {
+			ent->flags &= ~BR_SGRP_F_SEND;
+			if (ent->timer.expires > lmqt) {
+				if (brmctx->multicast_querier &&
+				    other_query &&
+				    !timer_pending(&other_query->timer))
+					ent->src_query_rexmit_cnt = lmqc;
+				__grp_src_mod_timer(ent, lmqt);
+			}
+		}
+	}
+
+	if (!brmctx->multicast_querier ||
+	    !other_query || timer_pending(&other_query->timer))
+		return;
+
+	__br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
+				  &pg->key.addr, true, 1, NULL);
+
+	lmi = now + brmctx->multicast_last_member_interval;
+	if (!timer_pending(&pg->rexmit_timer) ||
+	    time_after(pg->rexmit_timer.expires, lmi))
+		mod_timer(&pg->rexmit_timer, lmi);
+}
+
+static void __grp_send_query_and_rexmit(struct net_bridge_mcast *brmctx,
+					struct net_bridge_mcast_port *pmctx,
+					struct net_bridge_port_group *pg)
+{
+	struct bridge_mcast_other_query *other_query = NULL;
+	unsigned long now = jiffies, lmi;
+
+	if (!netif_running(brmctx->br->dev) ||
+	    !br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED))
+		return;
+
+	if (pg->key.addr.proto == htons(ETH_P_IP))
+		other_query = &brmctx->ip4_other_query;
+#if IS_ENABLED(CONFIG_IPV6)
+	else
+		other_query = &brmctx->ip6_other_query;
+#endif
+
+	if (brmctx->multicast_querier &&
+	    other_query && !timer_pending(&other_query->timer)) {
+		lmi = now + brmctx->multicast_last_member_interval;
+		pg->grp_query_rexmit_cnt = brmctx->multicast_last_member_count - 1;
+		__br_multicast_send_query(brmctx, pmctx, pg, &pg->key.addr,
+					  &pg->key.addr, false, 0, NULL);
+		if (!timer_pending(&pg->rexmit_timer) ||
+		    time_after(pg->rexmit_timer.expires, lmi))
+			mod_timer(&pg->rexmit_timer, lmi);
+	}
+
+	if (pg->filter_mode == MCAST_EXCLUDE &&
+	    (!timer_pending(&pg->timer) ||
+	     time_after(pg->timer.expires, now + br_multicast_lmqt(brmctx))))
+		mod_timer(&pg->timer, now + br_multicast_lmqt(brmctx));
+}
+
+/* State          Msg type      New state                Actions
+ * INCLUDE (A)    IS_IN (B)     INCLUDE (A+B)            (B)=GMI
+ * INCLUDE (A)    ALLOW (B)     INCLUDE (A+B)            (B)=GMI
+ * EXCLUDE (X,Y)  ALLOW (A)     EXCLUDE (X+A,Y-A)        (A)=GMI
+ */
+static bool br_multicast_isinc_allow(const struct net_bridge_mcast *brmctx,
+				     struct net_bridge_port_group *pg, void *h_addr,
+				     void *srcs, u32 nsrcs, size_t addr_size,
+				     int grec_type)
+{
+	struct net_bridge_group_src *ent;
+	unsigned long now = jiffies;
+	bool changed = false;
+	struct br_ip src_ip;
+	u32 src_idx;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (!ent) {
+			ent = br_multicast_new_group_src(pg, &src_ip);
+			if (ent)
+				changed = true;
+		}
+
+		if (ent)
+			__grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
+	}
+
+	if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				    grec_type))
+		changed = true;
+
+	return changed;
+}
+
+/* State          Msg type      New state                Actions
+ * INCLUDE (A)    IS_EX (B)     EXCLUDE (A*B,B-A)        (B-A)=0
+ *                                                       Delete (A-B)
+ *                                                       Group Timer=GMI
+ */
+static void __grp_src_isexc_incl(const struct net_bridge_mcast *brmctx,
+				 struct net_bridge_port_group *pg, void *h_addr,
+				 void *srcs, u32 nsrcs, size_t addr_size,
+				 int grec_type)
+{
+	struct net_bridge_group_src *ent;
+	struct br_ip src_ip;
+	u32 src_idx;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		ent->flags |= BR_SGRP_F_DELETE;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (ent)
+			ent->flags &= ~BR_SGRP_F_DELETE;
+		else
+			ent = br_multicast_new_group_src(pg, &src_ip);
+		if (ent)
+			br_multicast_fwd_src_handle(ent);
+	}
+
+	br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				grec_type);
+
+	__grp_src_delete_marked(pg);
+}
+
+/* State          Msg type      New state                Actions
+ * EXCLUDE (X,Y)  IS_EX (A)     EXCLUDE (A-Y,Y*A)        (A-X-Y)=GMI
+ *                                                       Delete (X-A)
+ *                                                       Delete (Y-A)
+ *                                                       Group Timer=GMI
+ */
+static bool __grp_src_isexc_excl(const struct net_bridge_mcast *brmctx,
+				 struct net_bridge_port_group *pg, void *h_addr,
+				 void *srcs, u32 nsrcs, size_t addr_size,
+				 int grec_type)
+{
+	struct net_bridge_group_src *ent;
+	unsigned long now = jiffies;
+	bool changed = false;
+	struct br_ip src_ip;
+	u32 src_idx;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		ent->flags |= BR_SGRP_F_DELETE;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (ent) {
+			ent->flags &= ~BR_SGRP_F_DELETE;
+		} else {
+			ent = br_multicast_new_group_src(pg, &src_ip);
+			if (ent) {
+				__grp_src_mod_timer(ent,
+						    now + br_multicast_gmi(brmctx));
+				changed = true;
+			}
+		}
+	}
+
+	if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				    grec_type))
+		changed = true;
+
+	if (__grp_src_delete_marked(pg))
+		changed = true;
+
+	return changed;
+}
+
+static bool br_multicast_isexc(const struct net_bridge_mcast *brmctx,
+			       struct net_bridge_port_group *pg, void *h_addr,
+			       void *srcs, u32 nsrcs, size_t addr_size,
+			       int grec_type)
+{
+	bool changed = false;
+
+	switch (pg->filter_mode) {
+	case MCAST_INCLUDE:
+		__grp_src_isexc_incl(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				     grec_type);
+		br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
+		changed = true;
+		break;
+	case MCAST_EXCLUDE:
+		changed = __grp_src_isexc_excl(brmctx, pg, h_addr, srcs, nsrcs,
+					       addr_size, grec_type);
+		break;
+	}
+
+	pg->filter_mode = MCAST_EXCLUDE;
+	mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
+
+	return changed;
+}
+
+/* State          Msg type      New state                Actions
+ * INCLUDE (A)    TO_IN (B)     INCLUDE (A+B)            (B)=GMI
+ *                                                       Send Q(G,A-B)
+ */
+static bool __grp_src_toin_incl(struct net_bridge_mcast *brmctx,
+				struct net_bridge_mcast_port *pmctx,
+				struct net_bridge_port_group *pg, void *h_addr,
+				void *srcs, u32 nsrcs, size_t addr_size,
+				int grec_type)
+{
+	u32 src_idx, to_send = pg->src_ents;
+	struct net_bridge_group_src *ent;
+	unsigned long now = jiffies;
+	bool changed = false;
+	struct br_ip src_ip;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		ent->flags |= BR_SGRP_F_SEND;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (ent) {
+			ent->flags &= ~BR_SGRP_F_SEND;
+			to_send--;
+		} else {
+			ent = br_multicast_new_group_src(pg, &src_ip);
+			if (ent)
+				changed = true;
+		}
+		if (ent)
+			__grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
+	}
+
+	if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				    grec_type))
+		changed = true;
+
+	if (to_send)
+		__grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
+
+	return changed;
+}
+
+/* State          Msg type      New state                Actions
+ * EXCLUDE (X,Y)  TO_IN (A)     EXCLUDE (X+A,Y-A)        (A)=GMI
+ *                                                       Send Q(G,X-A)
+ *                                                       Send Q(G)
+ */
+static bool __grp_src_toin_excl(struct net_bridge_mcast *brmctx,
+				struct net_bridge_mcast_port *pmctx,
+				struct net_bridge_port_group *pg, void *h_addr,
+				void *srcs, u32 nsrcs, size_t addr_size,
+				int grec_type)
+{
+	u32 src_idx, to_send = pg->src_ents;
+	struct net_bridge_group_src *ent;
+	unsigned long now = jiffies;
+	bool changed = false;
+	struct br_ip src_ip;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		if (timer_pending(&ent->timer))
+			ent->flags |= BR_SGRP_F_SEND;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (ent) {
+			if (timer_pending(&ent->timer)) {
+				ent->flags &= ~BR_SGRP_F_SEND;
+				to_send--;
+			}
+		} else {
+			ent = br_multicast_new_group_src(pg, &src_ip);
+			if (ent)
+				changed = true;
+		}
+		if (ent)
+			__grp_src_mod_timer(ent, now + br_multicast_gmi(brmctx));
+	}
+
+	if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				    grec_type))
+		changed = true;
+
+	if (to_send)
+		__grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
+
+	__grp_send_query_and_rexmit(brmctx, pmctx, pg);
+
+	return changed;
+}
+
+static bool br_multicast_toin(struct net_bridge_mcast *brmctx,
+			      struct net_bridge_mcast_port *pmctx,
+			      struct net_bridge_port_group *pg, void *h_addr,
+			      void *srcs, u32 nsrcs, size_t addr_size,
+			      int grec_type)
+{
+	bool changed = false;
+
+	switch (pg->filter_mode) {
+	case MCAST_INCLUDE:
+		changed = __grp_src_toin_incl(brmctx, pmctx, pg, h_addr, srcs,
+					      nsrcs, addr_size, grec_type);
+		break;
+	case MCAST_EXCLUDE:
+		changed = __grp_src_toin_excl(brmctx, pmctx, pg, h_addr, srcs,
+					      nsrcs, addr_size, grec_type);
+		break;
+	}
+
+	if (br_multicast_eht_should_del_pg(pg)) {
+		pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
+		br_multicast_find_del_pg(pg->key.port->br, pg);
+		/* a notification has already been sent and we shouldn't
+		 * access pg after the delete so we have to return false
+		 */
+		changed = false;
+	}
+
+	return changed;
+}
+
+/* State          Msg type      New state                Actions
+ * INCLUDE (A)    TO_EX (B)     EXCLUDE (A*B,B-A)        (B-A)=0
+ *                                                       Delete (A-B)
+ *                                                       Send Q(G,A*B)
+ *                                                       Group Timer=GMI
+ */
+static void __grp_src_toex_incl(struct net_bridge_mcast *brmctx,
+				struct net_bridge_mcast_port *pmctx,
+				struct net_bridge_port_group *pg, void *h_addr,
+				void *srcs, u32 nsrcs, size_t addr_size,
+				int grec_type)
+{
+	struct net_bridge_group_src *ent;
+	u32 src_idx, to_send = 0;
+	struct br_ip src_ip;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (ent) {
+			ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
+				     BR_SGRP_F_SEND;
+			to_send++;
+		} else {
+			ent = br_multicast_new_group_src(pg, &src_ip);
+		}
+		if (ent)
+			br_multicast_fwd_src_handle(ent);
+	}
+
+	br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				grec_type);
+
+	__grp_src_delete_marked(pg);
+	if (to_send)
+		__grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
+}
+
+/* State          Msg type      New state                Actions
+ * EXCLUDE (X,Y)  TO_EX (A)     EXCLUDE (A-Y,Y*A)        (A-X-Y)=Group Timer
+ *                                                       Delete (X-A)
+ *                                                       Delete (Y-A)
+ *                                                       Send Q(G,A-Y)
+ *                                                       Group Timer=GMI
+ */
+static bool __grp_src_toex_excl(struct net_bridge_mcast *brmctx,
+				struct net_bridge_mcast_port *pmctx,
+				struct net_bridge_port_group *pg, void *h_addr,
+				void *srcs, u32 nsrcs, size_t addr_size,
+				int grec_type)
+{
+	struct net_bridge_group_src *ent;
+	u32 src_idx, to_send = 0;
+	bool changed = false;
+	struct br_ip src_ip;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (ent) {
+			ent->flags &= ~BR_SGRP_F_DELETE;
+		} else {
+			ent = br_multicast_new_group_src(pg, &src_ip);
+			if (ent) {
+				__grp_src_mod_timer(ent, pg->timer.expires);
+				changed = true;
+			}
+		}
+		if (ent && timer_pending(&ent->timer)) {
+			ent->flags |= BR_SGRP_F_SEND;
+			to_send++;
+		}
+	}
+
+	if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				    grec_type))
+		changed = true;
+
+	if (__grp_src_delete_marked(pg))
+		changed = true;
+	if (to_send)
+		__grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
+
+	return changed;
+}
+
+static bool br_multicast_toex(struct net_bridge_mcast *brmctx,
+			      struct net_bridge_mcast_port *pmctx,
+			      struct net_bridge_port_group *pg, void *h_addr,
+			      void *srcs, u32 nsrcs, size_t addr_size,
+			      int grec_type)
+{
+	bool changed = false;
+
+	switch (pg->filter_mode) {
+	case MCAST_INCLUDE:
+		__grp_src_toex_incl(brmctx, pmctx, pg, h_addr, srcs, nsrcs,
+				    addr_size, grec_type);
+		br_multicast_star_g_handle_mode(pg, MCAST_EXCLUDE);
+		changed = true;
+		break;
+	case MCAST_EXCLUDE:
+		changed = __grp_src_toex_excl(brmctx, pmctx, pg, h_addr, srcs,
+					      nsrcs, addr_size, grec_type);
+		break;
+	}
+
+	pg->filter_mode = MCAST_EXCLUDE;
+	mod_timer(&pg->timer, jiffies + br_multicast_gmi(brmctx));
+
+	return changed;
+}
+
+/* State          Msg type      New state                Actions
+ * INCLUDE (A)    BLOCK (B)     INCLUDE (A)              Send Q(G,A*B)
+ */
+static bool __grp_src_block_incl(struct net_bridge_mcast *brmctx,
+				 struct net_bridge_mcast_port *pmctx,
+				 struct net_bridge_port_group *pg, void *h_addr,
+				 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
+{
+	struct net_bridge_group_src *ent;
+	u32 src_idx, to_send = 0;
+	bool changed = false;
+	struct br_ip src_ip;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		ent->flags &= ~BR_SGRP_F_SEND;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (ent) {
+			ent->flags |= BR_SGRP_F_SEND;
+			to_send++;
+		}
+	}
+
+	if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				    grec_type))
+		changed = true;
+
+	if (to_send)
+		__grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
+
+	return changed;
+}
+
+/* State          Msg type      New state                Actions
+ * EXCLUDE (X,Y)  BLOCK (A)     EXCLUDE (X+(A-Y),Y)      (A-X-Y)=Group Timer
+ *                                                       Send Q(G,A-Y)
+ */
+static bool __grp_src_block_excl(struct net_bridge_mcast *brmctx,
+				 struct net_bridge_mcast_port *pmctx,
+				 struct net_bridge_port_group *pg, void *h_addr,
+				 void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
+{
+	struct net_bridge_group_src *ent;
+	u32 src_idx, to_send = 0;
+	bool changed = false;
+	struct br_ip src_ip;
+
+	hlist_for_each_entry(ent, &pg->src_list, node)
+		ent->flags &= ~BR_SGRP_F_SEND;
+
+	memset(&src_ip, 0, sizeof(src_ip));
+	src_ip.proto = pg->key.addr.proto;
+	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
+		memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
+		ent = br_multicast_find_group_src(pg, &src_ip);
+		if (!ent) {
+			ent = br_multicast_new_group_src(pg, &src_ip);
+			if (ent) {
+				__grp_src_mod_timer(ent, pg->timer.expires);
+				changed = true;
+			}
+		}
+		if (ent && timer_pending(&ent->timer)) {
+			ent->flags |= BR_SGRP_F_SEND;
+			to_send++;
+		}
+	}
+
+	if (br_multicast_eht_handle(brmctx, pg, h_addr, srcs, nsrcs, addr_size,
+				    grec_type))
+		changed = true;
+
+	if (to_send)
+		__grp_src_query_marked_and_rexmit(brmctx, pmctx, pg);
+
+	return changed;
+}
+
+static bool br_multicast_block(struct net_bridge_mcast *brmctx,
+			       struct net_bridge_mcast_port *pmctx,
+			       struct net_bridge_port_group *pg, void *h_addr,
+			       void *srcs, u32 nsrcs, size_t addr_size, int grec_type)
+{
+	bool changed = false;
+
+	switch (pg->filter_mode) {
+	case MCAST_INCLUDE:
+		changed = __grp_src_block_incl(brmctx, pmctx, pg, h_addr, srcs,
+					       nsrcs, addr_size, grec_type);
+		break;
+	case MCAST_EXCLUDE:
+		changed = __grp_src_block_excl(brmctx, pmctx, pg, h_addr, srcs,
+					       nsrcs, addr_size, grec_type);
+		break;
+	}
+
+	if ((pg->filter_mode == MCAST_INCLUDE && hlist_empty(&pg->src_list)) ||
+	    br_multicast_eht_should_del_pg(pg)) {
+		if (br_multicast_eht_should_del_pg(pg))
+			pg->flags |= MDB_PG_FLAGS_FAST_LEAVE;
+		br_multicast_find_del_pg(pg->key.port->br, pg);
+		/* a notification has already been sent and we shouldn't
+		 * access pg after the delete so we have to return false
+		 */
+		changed = false;
+	}
+
+	return changed;
+}
+
+static struct net_bridge_port_group *
+br_multicast_find_port(struct net_bridge_mdb_entry *mp,
+		       struct net_bridge_port *p,
+		       const unsigned char *src)
+{
+	struct net_bridge *br __maybe_unused = mp->br;
+	struct net_bridge_port_group *pg;
+
+	for (pg = mlock_dereference(mp->ports, br);
+	     pg;
+	     pg = mlock_dereference(pg->next, br))
+		if (br_port_group_equal(pg, p, src))
+			return pg;
+
+	return NULL;
+}
+
+static int br_ip4_multicast_igmp3_report(struct net_bridge_mcast *brmctx,
+					 struct net_bridge_mcast_port *pmctx,
+					 struct sk_buff *skb,
+					 u16 vid)
+{
+	bool igmpv2 = brmctx->multicast_igmp_version == 2;
+	struct net_bridge_mdb_entry *mdst;
+	struct net_bridge_port_group *pg;
+	const unsigned char *src;
+	struct igmpv3_report *ih;
+	struct igmpv3_grec *grec;
+	int i, len, num, type;
+	__be32 group, *h_addr;
+	bool changed = false;
+	int err = 0;
+	u16 nsrcs;
+
+	ih = igmpv3_report_hdr(skb);
+	num = ntohs(ih->ngrec);
+	len = skb_transport_offset(skb) + sizeof(*ih);
+
+	for (i = 0; i < num; i++) {
+		len += sizeof(*grec);
+		if (!ip_mc_may_pull(skb, len))
+			return -EINVAL;
+
+		grec = (void *)(skb->data + len - sizeof(*grec));
+		group = grec->grec_mca;
+		type = grec->grec_type;
+		nsrcs = ntohs(grec->grec_nsrcs);
+
+		len += nsrcs * 4;
+		if (!ip_mc_may_pull(skb, len))
+			return -EINVAL;
+
+		switch (type) {
+		case IGMPV3_MODE_IS_INCLUDE:
+		case IGMPV3_MODE_IS_EXCLUDE:
+		case IGMPV3_CHANGE_TO_INCLUDE:
+		case IGMPV3_CHANGE_TO_EXCLUDE:
+		case IGMPV3_ALLOW_NEW_SOURCES:
+		case IGMPV3_BLOCK_OLD_SOURCES:
+			break;
+
+		default:
+			continue;
+		}
+
+		src = eth_hdr(skb)->h_source;
+		if (nsrcs == 0 &&
+		    (type == IGMPV3_CHANGE_TO_INCLUDE ||
+		     type == IGMPV3_MODE_IS_INCLUDE)) {
+			if (!pmctx || igmpv2) {
+				br_ip4_multicast_leave_group(brmctx, pmctx,
+							     group, vid, src);
+				continue;
+			}
+		} else {
+			err = br_ip4_multicast_add_group(brmctx, pmctx, group,
+							 vid, src, igmpv2);
+			if (err)
+				break;
+		}
+
+		if (!pmctx || igmpv2)
+			continue;
+
+		spin_lock_bh(&brmctx->br->multicast_lock);
+		if (!br_multicast_ctx_should_use(brmctx, pmctx))
+			goto unlock_continue;
+
+		mdst = br_mdb_ip4_get(brmctx->br, group, vid);
+		if (!mdst)
+			goto unlock_continue;
+		pg = br_multicast_find_port(mdst, pmctx->port, src);
+		if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
+			goto unlock_continue;
+		/* reload grec and host addr */
+		grec = (void *)(skb->data + len - sizeof(*grec) - (nsrcs * 4));
+		h_addr = &ip_hdr(skb)->saddr;
+		switch (type) {
+		case IGMPV3_ALLOW_NEW_SOURCES:
+			changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
+							   grec->grec_src,
+							   nsrcs, sizeof(__be32), type);
+			break;
+		case IGMPV3_MODE_IS_INCLUDE:
+			changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
+							   grec->grec_src,
+							   nsrcs, sizeof(__be32), type);
+			break;
+		case IGMPV3_MODE_IS_EXCLUDE:
+			changed = br_multicast_isexc(brmctx, pg, h_addr,
+						     grec->grec_src,
+						     nsrcs, sizeof(__be32), type);
+			break;
+		case IGMPV3_CHANGE_TO_INCLUDE:
+			changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
+						    grec->grec_src,
+						    nsrcs, sizeof(__be32), type);
+			break;
+		case IGMPV3_CHANGE_TO_EXCLUDE:
+			changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
+						    grec->grec_src,
+						    nsrcs, sizeof(__be32), type);
+			break;
+		case IGMPV3_BLOCK_OLD_SOURCES:
+			changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
+						     grec->grec_src,
+						     nsrcs, sizeof(__be32), type);
+			break;
+		}
+		if (changed)
+			br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
+unlock_continue:
+		spin_unlock_bh(&brmctx->br->multicast_lock);
+	}
+
+	return err;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int br_ip6_multicast_mld2_report(struct net_bridge_mcast *brmctx,
+					struct net_bridge_mcast_port *pmctx,
+					struct sk_buff *skb,
+					u16 vid)
+{
+	bool mldv1 = brmctx->multicast_mld_version == 1;
+	struct net_bridge_mdb_entry *mdst;
+	struct net_bridge_port_group *pg;
+	unsigned int nsrcs_offset;
+	struct mld2_report *mld2r;
+	const unsigned char *src;
+	struct in6_addr *h_addr;
+	struct mld2_grec *grec;
+	unsigned int grec_len;
+	bool changed = false;
+	int i, len, num;
+	int err = 0;
+
+	if (!ipv6_mc_may_pull(skb, sizeof(*mld2r)))
+		return -EINVAL;
+
+	mld2r = (struct mld2_report *)icmp6_hdr(skb);
+	num = ntohs(mld2r->mld2r_ngrec);
+	len = skb_transport_offset(skb) + sizeof(*mld2r);
+
+	for (i = 0; i < num; i++) {
+		__be16 *_nsrcs, __nsrcs;
+		u16 nsrcs;
+
+		nsrcs_offset = len + offsetof(struct mld2_grec, grec_nsrcs);
+
+		if (skb_transport_offset(skb) + ipv6_transport_len(skb) <
+		    nsrcs_offset + sizeof(__nsrcs))
+			return -EINVAL;
+
+		_nsrcs = skb_header_pointer(skb, nsrcs_offset,
+					    sizeof(__nsrcs), &__nsrcs);
+		if (!_nsrcs)
+			return -EINVAL;
+
+		nsrcs = ntohs(*_nsrcs);
+		grec_len = struct_size(grec, grec_src, nsrcs);
+
+		if (!ipv6_mc_may_pull(skb, len + grec_len))
+			return -EINVAL;
+
+		grec = (struct mld2_grec *)(skb->data + len);
+		len += grec_len;
+
+		switch (grec->grec_type) {
+		case MLD2_MODE_IS_INCLUDE:
+		case MLD2_MODE_IS_EXCLUDE:
+		case MLD2_CHANGE_TO_INCLUDE:
+		case MLD2_CHANGE_TO_EXCLUDE:
+		case MLD2_ALLOW_NEW_SOURCES:
+		case MLD2_BLOCK_OLD_SOURCES:
+			break;
+
+		default:
+			continue;
+		}
+
+		src = eth_hdr(skb)->h_source;
+		if ((grec->grec_type == MLD2_CHANGE_TO_INCLUDE ||
+		     grec->grec_type == MLD2_MODE_IS_INCLUDE) &&
+		    nsrcs == 0) {
+			if (!pmctx || mldv1) {
+				br_ip6_multicast_leave_group(brmctx, pmctx,
+							     &grec->grec_mca,
+							     vid, src);
+				continue;
+			}
+		} else {
+			err = br_ip6_multicast_add_group(brmctx, pmctx,
+							 &grec->grec_mca, vid,
+							 src, mldv1);
+			if (err)
+				break;
+		}
+
+		if (!pmctx || mldv1)
+			continue;
+
+		spin_lock_bh(&brmctx->br->multicast_lock);
+		if (!br_multicast_ctx_should_use(brmctx, pmctx))
+			goto unlock_continue;
+
+		mdst = br_mdb_ip6_get(brmctx->br, &grec->grec_mca, vid);
+		if (!mdst)
+			goto unlock_continue;
+		pg = br_multicast_find_port(mdst, pmctx->port, src);
+		if (!pg || (pg->flags & MDB_PG_FLAGS_PERMANENT))
+			goto unlock_continue;
+		h_addr = &ipv6_hdr(skb)->saddr;
+		switch (grec->grec_type) {
+		case MLD2_ALLOW_NEW_SOURCES:
+			changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
+							   grec->grec_src, nsrcs,
+							   sizeof(struct in6_addr),
+							   grec->grec_type);
+			break;
+		case MLD2_MODE_IS_INCLUDE:
+			changed = br_multicast_isinc_allow(brmctx, pg, h_addr,
+							   grec->grec_src, nsrcs,
+							   sizeof(struct in6_addr),
+							   grec->grec_type);
+			break;
+		case MLD2_MODE_IS_EXCLUDE:
+			changed = br_multicast_isexc(brmctx, pg, h_addr,
+						     grec->grec_src, nsrcs,
+						     sizeof(struct in6_addr),
+						     grec->grec_type);
+			break;
+		case MLD2_CHANGE_TO_INCLUDE:
+			changed = br_multicast_toin(brmctx, pmctx, pg, h_addr,
+						    grec->grec_src, nsrcs,
+						    sizeof(struct in6_addr),
+						    grec->grec_type);
+			break;
+		case MLD2_CHANGE_TO_EXCLUDE:
+			changed = br_multicast_toex(brmctx, pmctx, pg, h_addr,
+						    grec->grec_src, nsrcs,
+						    sizeof(struct in6_addr),
+						    grec->grec_type);
+			break;
+		case MLD2_BLOCK_OLD_SOURCES:
+			changed = br_multicast_block(brmctx, pmctx, pg, h_addr,
+						     grec->grec_src, nsrcs,
+						     sizeof(struct in6_addr),
+						     grec->grec_type);
+			break;
+		}
+		if (changed)
+			br_mdb_notify(brmctx->br->dev, mdst, pg, RTM_NEWMDB);
+unlock_continue:
+		spin_unlock_bh(&brmctx->br->multicast_lock);
+	}
+
+	return err;
+}
+#endif
+
+static bool br_multicast_select_querier(struct net_bridge_mcast *brmctx,
+					struct net_bridge_mcast_port *pmctx,
+					struct br_ip *saddr)
+{
+	int port_ifidx = pmctx ? pmctx->port->dev->ifindex : 0;
+	struct timer_list *own_timer, *other_timer;
+	struct bridge_mcast_querier *querier;
+
+	switch (saddr->proto) {
+	case htons(ETH_P_IP):
+		querier = &brmctx->ip4_querier;
+		own_timer = &brmctx->ip4_own_query.timer;
+		other_timer = &brmctx->ip4_other_query.timer;
+		if (!querier->addr.src.ip4 ||
+		    ntohl(saddr->src.ip4) <= ntohl(querier->addr.src.ip4))
+			goto update;
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		querier = &brmctx->ip6_querier;
+		own_timer = &brmctx->ip6_own_query.timer;
+		other_timer = &brmctx->ip6_other_query.timer;
+		if (ipv6_addr_cmp(&saddr->src.ip6, &querier->addr.src.ip6) <= 0)
+			goto update;
+		break;
+#endif
+	default:
+		return false;
+	}
+
+	if (!timer_pending(own_timer) && !timer_pending(other_timer))
+		goto update;
+
+	return false;
+
+update:
+	br_multicast_update_querier(brmctx, querier, port_ifidx, saddr);
+
+	return true;
+}
+
+static struct net_bridge_port *
+__br_multicast_get_querier_port(struct net_bridge *br,
+				const struct bridge_mcast_querier *querier)
+{
+	int port_ifidx = READ_ONCE(querier->port_ifidx);
+	struct net_bridge_port *p;
+	struct net_device *dev;
+
+	if (port_ifidx == 0)
+		return NULL;
+
+	dev = dev_get_by_index_rcu(dev_net(br->dev), port_ifidx);
+	if (!dev)
+		return NULL;
+	p = br_port_get_rtnl_rcu(dev);
+	if (!p || p->br != br)
+		return NULL;
+
+	return p;
+}
+
+size_t br_multicast_querier_state_size(void)
+{
+	return nla_total_size(0) +		/* nest attribute */
+	       nla_total_size(sizeof(__be32)) + /* BRIDGE_QUERIER_IP_ADDRESS */
+	       nla_total_size(sizeof(int)) +    /* BRIDGE_QUERIER_IP_PORT */
+	       nla_total_size_64bit(sizeof(u64)) + /* BRIDGE_QUERIER_IP_OTHER_TIMER */
+#if IS_ENABLED(CONFIG_IPV6)
+	       nla_total_size(sizeof(struct in6_addr)) + /* BRIDGE_QUERIER_IPV6_ADDRESS */
+	       nla_total_size(sizeof(int)) +		 /* BRIDGE_QUERIER_IPV6_PORT */
+	       nla_total_size_64bit(sizeof(u64)) +	 /* BRIDGE_QUERIER_IPV6_OTHER_TIMER */
+#endif
+	       0;
+}
+
+/* protected by rtnl or rcu */
+int br_multicast_dump_querier_state(struct sk_buff *skb,
+				    const struct net_bridge_mcast *brmctx,
+				    int nest_attr)
+{
+	struct bridge_mcast_querier querier = {};
+	struct net_bridge_port *p;
+	struct nlattr *nest;
+
+	if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED) ||
+	    br_multicast_ctx_vlan_global_disabled(brmctx))
+		return 0;
+
+	nest = nla_nest_start(skb, nest_attr);
+	if (!nest)
+		return -EMSGSIZE;
+
+	rcu_read_lock();
+	if (!brmctx->multicast_querier &&
+	    !timer_pending(&brmctx->ip4_other_query.timer))
+		goto out_v6;
+
+	br_multicast_read_querier(&brmctx->ip4_querier, &querier);
+	if (nla_put_in_addr(skb, BRIDGE_QUERIER_IP_ADDRESS,
+			    querier.addr.src.ip4)) {
+		rcu_read_unlock();
+		goto out_err;
+	}
+
+	p = __br_multicast_get_querier_port(brmctx->br, &querier);
+	if (timer_pending(&brmctx->ip4_other_query.timer) &&
+	    (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IP_OTHER_TIMER,
+			       br_timer_value(&brmctx->ip4_other_query.timer),
+			       BRIDGE_QUERIER_PAD) ||
+	     (p && nla_put_u32(skb, BRIDGE_QUERIER_IP_PORT, p->dev->ifindex)))) {
+		rcu_read_unlock();
+		goto out_err;
+	}
+
+out_v6:
+#if IS_ENABLED(CONFIG_IPV6)
+	if (!brmctx->multicast_querier &&
+	    !timer_pending(&brmctx->ip6_other_query.timer))
+		goto out;
+
+	br_multicast_read_querier(&brmctx->ip6_querier, &querier);
+	if (nla_put_in6_addr(skb, BRIDGE_QUERIER_IPV6_ADDRESS,
+			     &querier.addr.src.ip6)) {
+		rcu_read_unlock();
+		goto out_err;
+	}
+
+	p = __br_multicast_get_querier_port(brmctx->br, &querier);
+	if (timer_pending(&brmctx->ip6_other_query.timer) &&
+	    (nla_put_u64_64bit(skb, BRIDGE_QUERIER_IPV6_OTHER_TIMER,
+			       br_timer_value(&brmctx->ip6_other_query.timer),
+			       BRIDGE_QUERIER_PAD) ||
+	     (p && nla_put_u32(skb, BRIDGE_QUERIER_IPV6_PORT,
+			       p->dev->ifindex)))) {
+		rcu_read_unlock();
+		goto out_err;
+	}
+out:
+#endif
+	rcu_read_unlock();
+	nla_nest_end(skb, nest);
+	if (!nla_len(nest))
+		nla_nest_cancel(skb, nest);
+
+	return 0;
+
+out_err:
+	nla_nest_cancel(skb, nest);
+	return -EMSGSIZE;
+}
+
+static void
+br_multicast_update_query_timer(struct net_bridge_mcast *brmctx,
+				struct bridge_mcast_other_query *query,
+				unsigned long max_delay)
+{
+	if (!timer_pending(&query->timer))
+		query->delay_time = jiffies + max_delay;
+
+	mod_timer(&query->timer, jiffies + brmctx->multicast_querier_interval);
+}
+
+static void br_port_mc_router_state_change(struct net_bridge_port *p,
+					   bool is_mc_router)
+{
+	struct switchdev_attr attr = {
+		.orig_dev = p->dev,
+		.id = SWITCHDEV_ATTR_ID_PORT_MROUTER,
+		.flags = SWITCHDEV_F_DEFER,
+		.u.mrouter = is_mc_router,
+	};
+
+	switchdev_port_attr_set(p->dev, &attr, NULL);
+}
+
+static struct net_bridge_port *
+br_multicast_rport_from_node(struct net_bridge_mcast *brmctx,
+			     struct hlist_head *mc_router_list,
+			     struct hlist_node *rlist)
+{
+	struct net_bridge_mcast_port *pmctx;
+
+#if IS_ENABLED(CONFIG_IPV6)
+	if (mc_router_list == &brmctx->ip6_mc_router_list)
+		pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
+				    ip6_rlist);
+	else
+#endif
+		pmctx = hlist_entry(rlist, struct net_bridge_mcast_port,
+				    ip4_rlist);
+
+	return pmctx->port;
+}
+
+static struct hlist_node *
+br_multicast_get_rport_slot(struct net_bridge_mcast *brmctx,
+			    struct net_bridge_port *port,
+			    struct hlist_head *mc_router_list)
+
+{
+	struct hlist_node *slot = NULL;
+	struct net_bridge_port *p;
+	struct hlist_node *rlist;
+
+	hlist_for_each(rlist, mc_router_list) {
+		p = br_multicast_rport_from_node(brmctx, mc_router_list, rlist);
+
+		if ((unsigned long)port >= (unsigned long)p)
+			break;
+
+		slot = rlist;
+	}
+
+	return slot;
+}
+
+static bool br_multicast_no_router_otherpf(struct net_bridge_mcast_port *pmctx,
+					   struct hlist_node *rnode)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	if (rnode != &pmctx->ip6_rlist)
+		return hlist_unhashed(&pmctx->ip6_rlist);
+	else
+		return hlist_unhashed(&pmctx->ip4_rlist);
+#else
+	return true;
+#endif
+}
+
+/* Add port to router_list
+ *  list is maintained ordered by pointer value
+ *  and locked by br->multicast_lock and RCU
+ */
+static void br_multicast_add_router(struct net_bridge_mcast *brmctx,
+				    struct net_bridge_mcast_port *pmctx,
+				    struct hlist_node *rlist,
+				    struct hlist_head *mc_router_list)
+{
+	struct hlist_node *slot;
+
+	if (!hlist_unhashed(rlist))
+		return;
+
+	slot = br_multicast_get_rport_slot(brmctx, pmctx->port, mc_router_list);
+
+	if (slot)
+		hlist_add_behind_rcu(rlist, slot);
+	else
+		hlist_add_head_rcu(rlist, mc_router_list);
+
+	/* For backwards compatibility for now, only notify if we
+	 * switched from no IPv4/IPv6 multicast router to a new
+	 * IPv4 or IPv6 multicast router.
+	 */
+	if (br_multicast_no_router_otherpf(pmctx, rlist)) {
+		br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_NEWMDB);
+		br_port_mc_router_state_change(pmctx->port, true);
+	}
+}
+
+/* Add port to router_list
+ *  list is maintained ordered by pointer value
+ *  and locked by br->multicast_lock and RCU
+ */
+static void br_ip4_multicast_add_router(struct net_bridge_mcast *brmctx,
+					struct net_bridge_mcast_port *pmctx)
+{
+	br_multicast_add_router(brmctx, pmctx, &pmctx->ip4_rlist,
+				&brmctx->ip4_mc_router_list);
+}
+
+/* Add port to router_list
+ *  list is maintained ordered by pointer value
+ *  and locked by br->multicast_lock and RCU
+ */
+static void br_ip6_multicast_add_router(struct net_bridge_mcast *brmctx,
+					struct net_bridge_mcast_port *pmctx)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	br_multicast_add_router(brmctx, pmctx, &pmctx->ip6_rlist,
+				&brmctx->ip6_mc_router_list);
+#endif
+}
+
+static void br_multicast_mark_router(struct net_bridge_mcast *brmctx,
+				     struct net_bridge_mcast_port *pmctx,
+				     struct timer_list *timer,
+				     struct hlist_node *rlist,
+				     struct hlist_head *mc_router_list)
+{
+	unsigned long now = jiffies;
+
+	if (!br_multicast_ctx_should_use(brmctx, pmctx))
+		return;
+
+	if (!pmctx) {
+		if (brmctx->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) {
+			if (!br_ip4_multicast_is_router(brmctx) &&
+			    !br_ip6_multicast_is_router(brmctx))
+				br_mc_router_state_change(brmctx->br, true);
+			mod_timer(timer, now + brmctx->multicast_querier_interval);
+		}
+		return;
+	}
+
+	if (pmctx->multicast_router == MDB_RTR_TYPE_DISABLED ||
+	    pmctx->multicast_router == MDB_RTR_TYPE_PERM)
+		return;
+
+	br_multicast_add_router(brmctx, pmctx, rlist, mc_router_list);
+	mod_timer(timer, now + brmctx->multicast_querier_interval);
+}
+
+static void br_ip4_multicast_mark_router(struct net_bridge_mcast *brmctx,
+					 struct net_bridge_mcast_port *pmctx)
+{
+	struct timer_list *timer = &brmctx->ip4_mc_router_timer;
+	struct hlist_node *rlist = NULL;
+
+	if (pmctx) {
+		timer = &pmctx->ip4_mc_router_timer;
+		rlist = &pmctx->ip4_rlist;
+	}
+
+	br_multicast_mark_router(brmctx, pmctx, timer, rlist,
+				 &brmctx->ip4_mc_router_list);
+}
+
+static void br_ip6_multicast_mark_router(struct net_bridge_mcast *brmctx,
+					 struct net_bridge_mcast_port *pmctx)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+	struct timer_list *timer = &brmctx->ip6_mc_router_timer;
+	struct hlist_node *rlist = NULL;
+
+	if (pmctx) {
+		timer = &pmctx->ip6_mc_router_timer;
+		rlist = &pmctx->ip6_rlist;
+	}
+
+	br_multicast_mark_router(brmctx, pmctx, timer, rlist,
+				 &brmctx->ip6_mc_router_list);
+#endif
+}
+
+static void
+br_ip4_multicast_query_received(struct net_bridge_mcast *brmctx,
+				struct net_bridge_mcast_port *pmctx,
+				struct bridge_mcast_other_query *query,
+				struct br_ip *saddr,
+				unsigned long max_delay)
+{
+	if (!br_multicast_select_querier(brmctx, pmctx, saddr))
+		return;
+
+	br_multicast_update_query_timer(brmctx, query, max_delay);
+	br_ip4_multicast_mark_router(brmctx, pmctx);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void
+br_ip6_multicast_query_received(struct net_bridge_mcast *brmctx,
+				struct net_bridge_mcast_port *pmctx,
+				struct bridge_mcast_other_query *query,
+				struct br_ip *saddr,
+				unsigned long max_delay)
+{
+	if (!br_multicast_select_querier(brmctx, pmctx, saddr))
+		return;
+
+	br_multicast_update_query_timer(brmctx, query, max_delay);
+	br_ip6_multicast_mark_router(brmctx, pmctx);
+}
+#endif
+
+static void br_ip4_multicast_query(struct net_bridge_mcast *brmctx,
+				   struct net_bridge_mcast_port *pmctx,
+				   struct sk_buff *skb,
+				   u16 vid)
+{
+	unsigned int transport_len = ip_transport_len(skb);
+	const struct iphdr *iph = ip_hdr(skb);
+	struct igmphdr *ih = igmp_hdr(skb);
+	struct net_bridge_mdb_entry *mp;
+	struct igmpv3_query *ih3;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+	struct br_ip saddr = {};
+	unsigned long max_delay;
+	unsigned long now = jiffies;
+	__be32 group;
+
+	spin_lock(&brmctx->br->multicast_lock);
+	if (!br_multicast_ctx_should_use(brmctx, pmctx))
+		goto out;
+
+	group = ih->group;
+
+	if (transport_len == sizeof(*ih)) {
+		max_delay = ih->code * (HZ / IGMP_TIMER_SCALE);
+
+		if (!max_delay) {
+			max_delay = 10 * HZ;
+			group = 0;
+		}
+	} else if (transport_len >= sizeof(*ih3)) {
+		ih3 = igmpv3_query_hdr(skb);
+		if (ih3->nsrcs ||
+		    (brmctx->multicast_igmp_version == 3 && group &&
+		     ih3->suppress))
+			goto out;
+
+		max_delay = ih3->code ?
+			    IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
+	} else {
+		goto out;
+	}
+
+	if (!group) {
+		saddr.proto = htons(ETH_P_IP);
+		saddr.src.ip4 = iph->saddr;
+
+		br_ip4_multicast_query_received(brmctx, pmctx,
+						&brmctx->ip4_other_query,
+						&saddr, max_delay);
+		goto out;
+	}
+
+	mp = br_mdb_ip4_get(brmctx->br, group, vid);
+	if (!mp)
+		goto out;
+
+	max_delay *= brmctx->multicast_last_member_count;
+
+	if (mp->host_joined &&
+	    (timer_pending(&mp->timer) ?
+	     time_after(mp->timer.expires, now + max_delay) :
+	     try_to_del_timer_sync(&mp->timer) >= 0))
+		mod_timer(&mp->timer, now + max_delay);
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, brmctx->br)) != NULL;
+	     pp = &p->next) {
+		if (timer_pending(&p->timer) ?
+		    time_after(p->timer.expires, now + max_delay) :
+		    try_to_del_timer_sync(&p->timer) >= 0 &&
+		    (brmctx->multicast_igmp_version == 2 ||
+		     p->filter_mode == MCAST_EXCLUDE))
+			mod_timer(&p->timer, now + max_delay);
+	}
+
+out:
+	spin_unlock(&brmctx->br->multicast_lock);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int br_ip6_multicast_query(struct net_bridge_mcast *brmctx,
+				  struct net_bridge_mcast_port *pmctx,
+				  struct sk_buff *skb,
+				  u16 vid)
+{
+	unsigned int transport_len = ipv6_transport_len(skb);
+	struct mld_msg *mld;
+	struct net_bridge_mdb_entry *mp;
+	struct mld2_query *mld2q;
+	struct net_bridge_port_group *p;
+	struct net_bridge_port_group __rcu **pp;
+	struct br_ip saddr = {};
+	unsigned long max_delay;
+	unsigned long now = jiffies;
+	unsigned int offset = skb_transport_offset(skb);
+	const struct in6_addr *group = NULL;
+	bool is_general_query;
+	int err = 0;
+
+	spin_lock(&brmctx->br->multicast_lock);
+	if (!br_multicast_ctx_should_use(brmctx, pmctx))
+		goto out;
+
+	if (transport_len == sizeof(*mld)) {
+		if (!pskb_may_pull(skb, offset + sizeof(*mld))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld = (struct mld_msg *) icmp6_hdr(skb);
+		max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
+		if (max_delay)
+			group = &mld->mld_mca;
+	} else {
+		if (!pskb_may_pull(skb, offset + sizeof(*mld2q))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld2q = (struct mld2_query *)icmp6_hdr(skb);
+		if (!mld2q->mld2q_nsrcs)
+			group = &mld2q->mld2q_mca;
+		if (brmctx->multicast_mld_version == 2 &&
+		    !ipv6_addr_any(&mld2q->mld2q_mca) &&
+		    mld2q->mld2q_suppress)
+			goto out;
+
+		max_delay = max(msecs_to_jiffies(mldv2_mrc(mld2q)), 1UL);
+	}
+
+	is_general_query = group && ipv6_addr_any(group);
+
+	if (is_general_query) {
+		saddr.proto = htons(ETH_P_IPV6);
+		saddr.src.ip6 = ipv6_hdr(skb)->saddr;
+
+		br_ip6_multicast_query_received(brmctx, pmctx,
+						&brmctx->ip6_other_query,
+						&saddr, max_delay);
+		goto out;
+	} else if (!group) {
+		goto out;
+	}
+
+	mp = br_mdb_ip6_get(brmctx->br, group, vid);
+	if (!mp)
+		goto out;
+
+	max_delay *= brmctx->multicast_last_member_count;
+	if (mp->host_joined &&
+	    (timer_pending(&mp->timer) ?
+	     time_after(mp->timer.expires, now + max_delay) :
+	     try_to_del_timer_sync(&mp->timer) >= 0))
+		mod_timer(&mp->timer, now + max_delay);
+
+	for (pp = &mp->ports;
+	     (p = mlock_dereference(*pp, brmctx->br)) != NULL;
+	     pp = &p->next) {
+		if (timer_pending(&p->timer) ?
+		    time_after(p->timer.expires, now + max_delay) :
+		    try_to_del_timer_sync(&p->timer) >= 0 &&
+		    (brmctx->multicast_mld_version == 1 ||
+		     p->filter_mode == MCAST_EXCLUDE))
+			mod_timer(&p->timer, now + max_delay);
+	}
+
+out:
+	spin_unlock(&brmctx->br->multicast_lock);
+	return err;
+}
+#endif
+
+static void
+br_multicast_leave_group(struct net_bridge_mcast *brmctx,
+			 struct net_bridge_mcast_port *pmctx,
+			 struct br_ip *group,
+			 struct bridge_mcast_other_query *other_query,
+			 struct bridge_mcast_own_query *own_query,
+			 const unsigned char *src)
+{
+	struct net_bridge_mdb_entry *mp;
+	struct net_bridge_port_group *p;
+	unsigned long now;
+	unsigned long time;
+
+	spin_lock(&brmctx->br->multicast_lock);
+	if (!br_multicast_ctx_should_use(brmctx, pmctx))
+		goto out;
+
+	mp = br_mdb_ip_get(brmctx->br, group);
+	if (!mp)
+		goto out;
+
+	if (pmctx && (pmctx->port->flags & BR_MULTICAST_FAST_LEAVE)) {
+		struct net_bridge_port_group __rcu **pp;
+
+		for (pp = &mp->ports;
+		     (p = mlock_dereference(*pp, brmctx->br)) != NULL;
+		     pp = &p->next) {
+			if (!br_port_group_equal(p, pmctx->port, src))
+				continue;
+
+			if (p->flags & MDB_PG_FLAGS_PERMANENT)
+				break;
+
+			p->flags |= MDB_PG_FLAGS_FAST_LEAVE;
+			br_multicast_del_pg(mp, p, pp);
+		}
+		goto out;
+	}
+
+	if (timer_pending(&other_query->timer))
+		goto out;
+
+	if (brmctx->multicast_querier) {
+		__br_multicast_send_query(brmctx, pmctx, NULL, NULL, &mp->addr,
+					  false, 0, NULL);
+
+		time = jiffies + brmctx->multicast_last_member_count *
+				 brmctx->multicast_last_member_interval;
+
+		mod_timer(&own_query->timer, time);
+
+		for (p = mlock_dereference(mp->ports, brmctx->br);
+		     p != NULL && pmctx != NULL;
+		     p = mlock_dereference(p->next, brmctx->br)) {
+			if (!br_port_group_equal(p, pmctx->port, src))
+				continue;
+
+			if (!hlist_unhashed(&p->mglist) &&
+			    (timer_pending(&p->timer) ?
+			     time_after(p->timer.expires, time) :
+			     try_to_del_timer_sync(&p->timer) >= 0)) {
+				mod_timer(&p->timer, time);
+			}
+
+			break;
+		}
+	}
+
+	now = jiffies;
+	time = now + brmctx->multicast_last_member_count *
+		     brmctx->multicast_last_member_interval;
+
+	if (!pmctx) {
+		if (mp->host_joined &&
+		    (timer_pending(&mp->timer) ?
+		     time_after(mp->timer.expires, time) :
+		     try_to_del_timer_sync(&mp->timer) >= 0)) {
+			mod_timer(&mp->timer, time);
+		}
+
+		goto out;
+	}
+
+	for (p = mlock_dereference(mp->ports, brmctx->br);
+	     p != NULL;
+	     p = mlock_dereference(p->next, brmctx->br)) {
+		if (p->key.port != pmctx->port)
+			continue;
+
+		if (!hlist_unhashed(&p->mglist) &&
+		    (timer_pending(&p->timer) ?
+		     time_after(p->timer.expires, time) :
+		     try_to_del_timer_sync(&p->timer) >= 0)) {
+			mod_timer(&p->timer, time);
+		}
+
+		break;
+	}
+out:
+	spin_unlock(&brmctx->br->multicast_lock);
+}
+
+static void br_ip4_multicast_leave_group(struct net_bridge_mcast *brmctx,
+					 struct net_bridge_mcast_port *pmctx,
+					 __be32 group,
+					 __u16 vid,
+					 const unsigned char *src)
+{
+	struct br_ip br_group;
+	struct bridge_mcast_own_query *own_query;
+
+	if (ipv4_is_local_multicast(group))
+		return;
+
+	own_query = pmctx ? &pmctx->ip4_own_query : &brmctx->ip4_own_query;
+
+	memset(&br_group, 0, sizeof(br_group));
+	br_group.dst.ip4 = group;
+	br_group.proto = htons(ETH_P_IP);
+	br_group.vid = vid;
+
+	br_multicast_leave_group(brmctx, pmctx, &br_group,
+				 &brmctx->ip4_other_query,
+				 own_query, src);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_leave_group(struct net_bridge_mcast *brmctx,
+					 struct net_bridge_mcast_port *pmctx,
+					 const struct in6_addr *group,
+					 __u16 vid,
+					 const unsigned char *src)
+{
+	struct br_ip br_group;
+	struct bridge_mcast_own_query *own_query;
+
+	if (ipv6_addr_is_ll_all_nodes(group))
+		return;
+
+	own_query = pmctx ? &pmctx->ip6_own_query : &brmctx->ip6_own_query;
+
+	memset(&br_group, 0, sizeof(br_group));
+	br_group.dst.ip6 = *group;
+	br_group.proto = htons(ETH_P_IPV6);
+	br_group.vid = vid;
+
+	br_multicast_leave_group(brmctx, pmctx, &br_group,
+				 &brmctx->ip6_other_query,
+				 own_query, src);
+}
+#endif
+
+static void br_multicast_err_count(const struct net_bridge *br,
+				   const struct net_bridge_port *p,
+				   __be16 proto)
+{
+	struct bridge_mcast_stats __percpu *stats;
+	struct bridge_mcast_stats *pstats;
+
+	if (!br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
+		return;
+
+	if (p)
+		stats = p->mcast_stats;
+	else
+		stats = br->mcast_stats;
+	if (WARN_ON(!stats))
+		return;
+
+	pstats = this_cpu_ptr(stats);
+
+	u64_stats_update_begin(&pstats->syncp);
+	switch (proto) {
+	case htons(ETH_P_IP):
+		pstats->mstats.igmp_parse_errors++;
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		pstats->mstats.mld_parse_errors++;
+		break;
+#endif
+	}
+	u64_stats_update_end(&pstats->syncp);
+}
+
+static void br_multicast_pim(struct net_bridge_mcast *brmctx,
+			     struct net_bridge_mcast_port *pmctx,
+			     const struct sk_buff *skb)
+{
+	unsigned int offset = skb_transport_offset(skb);
+	struct pimhdr *pimhdr, _pimhdr;
+
+	pimhdr = skb_header_pointer(skb, offset, sizeof(_pimhdr), &_pimhdr);
+	if (!pimhdr || pim_hdr_version(pimhdr) != PIM_VERSION ||
+	    pim_hdr_type(pimhdr) != PIM_TYPE_HELLO)
+		return;
+
+	spin_lock(&brmctx->br->multicast_lock);
+	br_ip4_multicast_mark_router(brmctx, pmctx);
+	spin_unlock(&brmctx->br->multicast_lock);
+}
+
+static int br_ip4_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
+				    struct net_bridge_mcast_port *pmctx,
+				    struct sk_buff *skb)
+{
+	if (ip_hdr(skb)->protocol != IPPROTO_IGMP ||
+	    igmp_hdr(skb)->type != IGMP_MRDISC_ADV)
+		return -ENOMSG;
+
+	spin_lock(&brmctx->br->multicast_lock);
+	br_ip4_multicast_mark_router(brmctx, pmctx);
+	spin_unlock(&brmctx->br->multicast_lock);
+
+	return 0;
+}
+
+static int br_multicast_ipv4_rcv(struct net_bridge_mcast *brmctx,
+				 struct net_bridge_mcast_port *pmctx,
+				 struct sk_buff *skb,
+				 u16 vid)
+{
+	struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
+	const unsigned char *src;
+	struct igmphdr *ih;
+	int err;
+
+	err = ip_mc_check_igmp(skb);
+
+	if (err == -ENOMSG) {
+		if (!ipv4_is_local_multicast(ip_hdr(skb)->daddr)) {
+			BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+		} else if (pim_ipv4_all_pim_routers(ip_hdr(skb)->daddr)) {
+			if (ip_hdr(skb)->protocol == IPPROTO_PIM)
+				br_multicast_pim(brmctx, pmctx, skb);
+		} else if (ipv4_is_all_snoopers(ip_hdr(skb)->daddr)) {
+			br_ip4_multicast_mrd_rcv(brmctx, pmctx, skb);
+		}
+
+		return 0;
+	} else if (err < 0) {
+		br_multicast_err_count(brmctx->br, p, skb->protocol);
+		return err;
+	}
+
+	ih = igmp_hdr(skb);
+	src = eth_hdr(skb)->h_source;
+	BR_INPUT_SKB_CB(skb)->igmp = ih->type;
+
+	switch (ih->type) {
+	case IGMP_HOST_MEMBERSHIP_REPORT:
+	case IGMPV2_HOST_MEMBERSHIP_REPORT:
+		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+		err = br_ip4_multicast_add_group(brmctx, pmctx, ih->group, vid,
+						 src, true);
+		break;
+	case IGMPV3_HOST_MEMBERSHIP_REPORT:
+		err = br_ip4_multicast_igmp3_report(brmctx, pmctx, skb, vid);
+		break;
+	case IGMP_HOST_MEMBERSHIP_QUERY:
+		br_ip4_multicast_query(brmctx, pmctx, skb, vid);
+		break;
+	case IGMP_HOST_LEAVE_MESSAGE:
+		br_ip4_multicast_leave_group(brmctx, pmctx, ih->group, vid, src);
+		break;
+	}
+
+	br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
+			   BR_MCAST_DIR_RX);
+
+	return err;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_mrd_rcv(struct net_bridge_mcast *brmctx,
+				     struct net_bridge_mcast_port *pmctx,
+				     struct sk_buff *skb)
+{
+	if (icmp6_hdr(skb)->icmp6_type != ICMPV6_MRDISC_ADV)
+		return;
+
+	spin_lock(&brmctx->br->multicast_lock);
+	br_ip6_multicast_mark_router(brmctx, pmctx);
+	spin_unlock(&brmctx->br->multicast_lock);
+}
+
+static int br_multicast_ipv6_rcv(struct net_bridge_mcast *brmctx,
+				 struct net_bridge_mcast_port *pmctx,
+				 struct sk_buff *skb,
+				 u16 vid)
+{
+	struct net_bridge_port *p = pmctx ? pmctx->port : NULL;
+	const unsigned char *src;
+	struct mld_msg *mld;
+	int err;
+
+	err = ipv6_mc_check_mld(skb);
+
+	if (err == -ENOMSG || err == -ENODATA) {
+		if (!ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))
+			BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+		if (err == -ENODATA &&
+		    ipv6_addr_is_all_snoopers(&ipv6_hdr(skb)->daddr))
+			br_ip6_multicast_mrd_rcv(brmctx, pmctx, skb);
+
+		return 0;
+	} else if (err < 0) {
+		br_multicast_err_count(brmctx->br, p, skb->protocol);
+		return err;
+	}
+
+	mld = (struct mld_msg *)skb_transport_header(skb);
+	BR_INPUT_SKB_CB(skb)->igmp = mld->mld_type;
+
+	switch (mld->mld_type) {
+	case ICMPV6_MGM_REPORT:
+		src = eth_hdr(skb)->h_source;
+		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
+		err = br_ip6_multicast_add_group(brmctx, pmctx, &mld->mld_mca,
+						 vid, src, true);
+		break;
+	case ICMPV6_MLD2_REPORT:
+		err = br_ip6_multicast_mld2_report(brmctx, pmctx, skb, vid);
+		break;
+	case ICMPV6_MGM_QUERY:
+		err = br_ip6_multicast_query(brmctx, pmctx, skb, vid);
+		break;
+	case ICMPV6_MGM_REDUCTION:
+		src = eth_hdr(skb)->h_source;
+		br_ip6_multicast_leave_group(brmctx, pmctx, &mld->mld_mca, vid,
+					     src);
+		break;
+	}
+
+	br_multicast_count(brmctx->br, p, skb, BR_INPUT_SKB_CB(skb)->igmp,
+			   BR_MCAST_DIR_RX);
+
+	return err;
+}
+#endif
+
+int br_multicast_rcv(struct net_bridge_mcast **brmctx,
+		     struct net_bridge_mcast_port **pmctx,
+		     struct net_bridge_vlan *vlan,
+		     struct sk_buff *skb, u16 vid)
+{
+	int ret = 0;
+
+	BR_INPUT_SKB_CB(skb)->igmp = 0;
+	BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
+
+	if (!br_opt_get((*brmctx)->br, BROPT_MULTICAST_ENABLED))
+		return 0;
+
+	if (br_opt_get((*brmctx)->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && vlan) {
+		const struct net_bridge_vlan *masterv;
+
+		/* the vlan has the master flag set only when transmitting
+		 * through the bridge device
+		 */
+		if (br_vlan_is_master(vlan)) {
+			masterv = vlan;
+			*brmctx = &vlan->br_mcast_ctx;
+			*pmctx = NULL;
+		} else {
+			masterv = vlan->brvlan;
+			*brmctx = &vlan->brvlan->br_mcast_ctx;
+			*pmctx = &vlan->port_mcast_ctx;
+		}
+
+		if (!(masterv->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
+			return 0;
+	}
+
+	switch (skb->protocol) {
+	case htons(ETH_P_IP):
+		ret = br_multicast_ipv4_rcv(*brmctx, *pmctx, skb, vid);
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		ret = br_multicast_ipv6_rcv(*brmctx, *pmctx, skb, vid);
+		break;
+#endif
+	}
+
+	return ret;
+}
+
+static void br_multicast_query_expired(struct net_bridge_mcast *brmctx,
+				       struct bridge_mcast_own_query *query,
+				       struct bridge_mcast_querier *querier)
+{
+	spin_lock(&brmctx->br->multicast_lock);
+	if (br_multicast_ctx_vlan_disabled(brmctx))
+		goto out;
+
+	if (query->startup_sent < brmctx->multicast_startup_query_count)
+		query->startup_sent++;
+
+	br_multicast_send_query(brmctx, NULL, query);
+out:
+	spin_unlock(&brmctx->br->multicast_lock);
+}
+
+static void br_ip4_multicast_query_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
+						     ip4_own_query.timer);
+
+	br_multicast_query_expired(brmctx, &brmctx->ip4_own_query,
+				   &brmctx->ip4_querier);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_query_expired(struct timer_list *t)
+{
+	struct net_bridge_mcast *brmctx = from_timer(brmctx, t,
+						     ip6_own_query.timer);
+
+	br_multicast_query_expired(brmctx, &brmctx->ip6_own_query,
+				   &brmctx->ip6_querier);
+}
+#endif
+
+static void br_multicast_gc_work(struct work_struct *work)
+{
+	struct net_bridge *br = container_of(work, struct net_bridge,
+					     mcast_gc_work);
+	HLIST_HEAD(deleted_head);
+
+	spin_lock_bh(&br->multicast_lock);
+	hlist_move_list(&br->mcast_gc_list, &deleted_head);
+	spin_unlock_bh(&br->multicast_lock);
+
+	br_multicast_gc(&deleted_head);
+}
+
+void br_multicast_ctx_init(struct net_bridge *br,
+			   struct net_bridge_vlan *vlan,
+			   struct net_bridge_mcast *brmctx)
+{
+	brmctx->br = br;
+	brmctx->vlan = vlan;
+	brmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
+	brmctx->multicast_last_member_count = 2;
+	brmctx->multicast_startup_query_count = 2;
+
+	brmctx->multicast_last_member_interval = HZ;
+	brmctx->multicast_query_response_interval = 10 * HZ;
+	brmctx->multicast_startup_query_interval = 125 * HZ / 4;
+	brmctx->multicast_query_interval = 125 * HZ;
+	brmctx->multicast_querier_interval = 255 * HZ;
+	brmctx->multicast_membership_interval = 260 * HZ;
+
+	brmctx->ip4_other_query.delay_time = 0;
+	brmctx->ip4_querier.port_ifidx = 0;
+	seqcount_spinlock_init(&brmctx->ip4_querier.seq, &br->multicast_lock);
+	brmctx->multicast_igmp_version = 2;
+#if IS_ENABLED(CONFIG_IPV6)
+	brmctx->multicast_mld_version = 1;
+	brmctx->ip6_other_query.delay_time = 0;
+	brmctx->ip6_querier.port_ifidx = 0;
+	seqcount_spinlock_init(&brmctx->ip6_querier.seq, &br->multicast_lock);
+#endif
+
+	timer_setup(&brmctx->ip4_mc_router_timer,
+		    br_ip4_multicast_local_router_expired, 0);
+	timer_setup(&brmctx->ip4_other_query.timer,
+		    br_ip4_multicast_querier_expired, 0);
+	timer_setup(&brmctx->ip4_own_query.timer,
+		    br_ip4_multicast_query_expired, 0);
+#if IS_ENABLED(CONFIG_IPV6)
+	timer_setup(&brmctx->ip6_mc_router_timer,
+		    br_ip6_multicast_local_router_expired, 0);
+	timer_setup(&brmctx->ip6_other_query.timer,
+		    br_ip6_multicast_querier_expired, 0);
+	timer_setup(&brmctx->ip6_own_query.timer,
+		    br_ip6_multicast_query_expired, 0);
+#endif
+}
+
+void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
+{
+	__br_multicast_stop(brmctx);
+}
+
+void br_multicast_init(struct net_bridge *br)
+{
+	br->hash_max = BR_MULTICAST_DEFAULT_HASH_MAX;
+
+	br_multicast_ctx_init(br, NULL, &br->multicast_ctx);
+
+	br_opt_toggle(br, BROPT_MULTICAST_ENABLED, true);
+	br_opt_toggle(br, BROPT_HAS_IPV6_ADDR, true);
+
+	spin_lock_init(&br->multicast_lock);
+	INIT_HLIST_HEAD(&br->mdb_list);
+	INIT_HLIST_HEAD(&br->mcast_gc_list);
+	INIT_WORK(&br->mcast_gc_work, br_multicast_gc_work);
+}
+
+static void br_ip4_multicast_join_snoopers(struct net_bridge *br)
+{
+	struct in_device *in_dev = in_dev_get(br->dev);
+
+	if (!in_dev)
+		return;
+
+	__ip_mc_inc_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
+	in_dev_put(in_dev);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_join_snoopers(struct net_bridge *br)
+{
+	struct in6_addr addr;
+
+	ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
+	ipv6_dev_mc_inc(br->dev, &addr);
+}
+#else
+static inline void br_ip6_multicast_join_snoopers(struct net_bridge *br)
+{
+}
+#endif
+
+void br_multicast_join_snoopers(struct net_bridge *br)
+{
+	br_ip4_multicast_join_snoopers(br);
+	br_ip6_multicast_join_snoopers(br);
+}
+
+static void br_ip4_multicast_leave_snoopers(struct net_bridge *br)
+{
+	struct in_device *in_dev = in_dev_get(br->dev);
+
+	if (WARN_ON(!in_dev))
+		return;
+
+	__ip_mc_dec_group(in_dev, htonl(INADDR_ALLSNOOPERS_GROUP), GFP_ATOMIC);
+	in_dev_put(in_dev);
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
+{
+	struct in6_addr addr;
+
+	ipv6_addr_set(&addr, htonl(0xff020000), 0, 0, htonl(0x6a));
+	ipv6_dev_mc_dec(br->dev, &addr);
+}
+#else
+static inline void br_ip6_multicast_leave_snoopers(struct net_bridge *br)
+{
+}
+#endif
+
+void br_multicast_leave_snoopers(struct net_bridge *br)
+{
+	br_ip4_multicast_leave_snoopers(br);
+	br_ip6_multicast_leave_snoopers(br);
+}
+
+static void __br_multicast_open_query(struct net_bridge *br,
+				      struct bridge_mcast_own_query *query)
+{
+	query->startup_sent = 0;
+
+	if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
+		return;
+
+	mod_timer(&query->timer, jiffies);
+}
+
+static void __br_multicast_open(struct net_bridge_mcast *brmctx)
+{
+	__br_multicast_open_query(brmctx->br, &brmctx->ip4_own_query);
+#if IS_ENABLED(CONFIG_IPV6)
+	__br_multicast_open_query(brmctx->br, &brmctx->ip6_own_query);
+#endif
+}
+
+void br_multicast_open(struct net_bridge *br)
+{
+	ASSERT_RTNL();
+
+	if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
+		struct net_bridge_vlan_group *vg;
+		struct net_bridge_vlan *vlan;
+
+		vg = br_vlan_group(br);
+		if (vg) {
+			list_for_each_entry(vlan, &vg->vlan_list, vlist) {
+				struct net_bridge_mcast *brmctx;
+
+				brmctx = &vlan->br_mcast_ctx;
+				if (br_vlan_is_brentry(vlan) &&
+				    !br_multicast_ctx_vlan_disabled(brmctx))
+					__br_multicast_open(&vlan->br_mcast_ctx);
+			}
+		}
+	} else {
+		__br_multicast_open(&br->multicast_ctx);
+	}
+}
+
+static void __br_multicast_stop(struct net_bridge_mcast *brmctx)
+{
+	del_timer_sync(&brmctx->ip4_mc_router_timer);
+	del_timer_sync(&brmctx->ip4_other_query.timer);
+	del_timer_sync(&brmctx->ip4_own_query.timer);
+#if IS_ENABLED(CONFIG_IPV6)
+	del_timer_sync(&brmctx->ip6_mc_router_timer);
+	del_timer_sync(&brmctx->ip6_other_query.timer);
+	del_timer_sync(&brmctx->ip6_own_query.timer);
+#endif
+}
+
+void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on)
+{
+	struct net_bridge *br;
+
+	/* it's okay to check for the flag without the multicast lock because it
+	 * can only change under RTNL -> multicast_lock, we need the latter to
+	 * sync with timers and packets
+	 */
+	if (on == !!(vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED))
+		return;
+
+	if (br_vlan_is_master(vlan)) {
+		br = vlan->br;
+
+		if (!br_vlan_is_brentry(vlan) ||
+		    (on &&
+		     br_multicast_ctx_vlan_global_disabled(&vlan->br_mcast_ctx)))
+			return;
+
+		spin_lock_bh(&br->multicast_lock);
+		vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
+		spin_unlock_bh(&br->multicast_lock);
+
+		if (on)
+			__br_multicast_open(&vlan->br_mcast_ctx);
+		else
+			__br_multicast_stop(&vlan->br_mcast_ctx);
+	} else {
+		struct net_bridge_mcast *brmctx;
+
+		brmctx = br_multicast_port_ctx_get_global(&vlan->port_mcast_ctx);
+		if (on && br_multicast_ctx_vlan_global_disabled(brmctx))
+			return;
+
+		br = vlan->port->br;
+		spin_lock_bh(&br->multicast_lock);
+		vlan->priv_flags ^= BR_VLFLAG_MCAST_ENABLED;
+		if (on)
+			__br_multicast_enable_port_ctx(&vlan->port_mcast_ctx);
+		else
+			__br_multicast_disable_port_ctx(&vlan->port_mcast_ctx);
+		spin_unlock_bh(&br->multicast_lock);
+	}
+}
+
+static void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on)
+{
+	struct net_bridge_port *p;
+
+	if (WARN_ON_ONCE(!br_vlan_is_master(vlan)))
+		return;
+
+	list_for_each_entry(p, &vlan->br->port_list, list) {
+		struct net_bridge_vlan *vport;
+
+		vport = br_vlan_find(nbp_vlan_group(p), vlan->vid);
+		if (!vport)
+			continue;
+		br_multicast_toggle_one_vlan(vport, on);
+	}
+
+	if (br_vlan_is_brentry(vlan))
+		br_multicast_toggle_one_vlan(vlan, on);
+}
+
+int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
+				      struct netlink_ext_ack *extack)
+{
+	struct net_bridge_vlan_group *vg;
+	struct net_bridge_vlan *vlan;
+	struct net_bridge_port *p;
+
+	if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) == on)
+		return 0;
+
+	if (on && !br_opt_get(br, BROPT_VLAN_ENABLED)) {
+		NL_SET_ERR_MSG_MOD(extack, "Cannot enable multicast vlan snooping with vlan filtering disabled");
+		return -EINVAL;
+	}
+
+	vg = br_vlan_group(br);
+	if (!vg)
+		return 0;
+
+	br_opt_toggle(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED, on);
+
+	/* disable/enable non-vlan mcast contexts based on vlan snooping */
+	if (on)
+		__br_multicast_stop(&br->multicast_ctx);
+	else
+		__br_multicast_open(&br->multicast_ctx);
+	list_for_each_entry(p, &br->port_list, list) {
+		if (on)
+			br_multicast_disable_port(p);
+		else
+			br_multicast_enable_port(p);
+	}
+
+	list_for_each_entry(vlan, &vg->vlan_list, vlist)
+		br_multicast_toggle_vlan(vlan, on);
+
+	return 0;
+}
+
+bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on)
+{
+	ASSERT_RTNL();
+
+	/* BR_VLFLAG_GLOBAL_MCAST_ENABLED relies on eventual consistency and
+	 * requires only RTNL to change
+	 */
+	if (on == !!(vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED))
+		return false;
+
+	vlan->priv_flags ^= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
+	br_multicast_toggle_vlan(vlan, on);
+
+	return true;
+}
+
+void br_multicast_stop(struct net_bridge *br)
+{
+	ASSERT_RTNL();
+
+	if (br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
+		struct net_bridge_vlan_group *vg;
+		struct net_bridge_vlan *vlan;
+
+		vg = br_vlan_group(br);
+		if (vg) {
+			list_for_each_entry(vlan, &vg->vlan_list, vlist) {
+				struct net_bridge_mcast *brmctx;
+
+				brmctx = &vlan->br_mcast_ctx;
+				if (br_vlan_is_brentry(vlan) &&
+				    !br_multicast_ctx_vlan_disabled(brmctx))
+					__br_multicast_stop(&vlan->br_mcast_ctx);
+			}
+		}
+	} else {
+		__br_multicast_stop(&br->multicast_ctx);
+	}
+}
+
+void br_multicast_dev_del(struct net_bridge *br)
+{
+	struct net_bridge_mdb_entry *mp;
+	HLIST_HEAD(deleted_head);
+	struct hlist_node *tmp;
+
+	spin_lock_bh(&br->multicast_lock);
+	hlist_for_each_entry_safe(mp, tmp, &br->mdb_list, mdb_node)
+		br_multicast_del_mdb_entry(mp);
+	hlist_move_list(&br->mcast_gc_list, &deleted_head);
+	spin_unlock_bh(&br->multicast_lock);
+
+	br_multicast_ctx_deinit(&br->multicast_ctx);
+	br_multicast_gc(&deleted_head);
+	cancel_work_sync(&br->mcast_gc_work);
+
+	rcu_barrier();
+}
+
+int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val)
+{
+	int err = -EINVAL;
+
+	spin_lock_bh(&brmctx->br->multicast_lock);
+
+	switch (val) {
+	case MDB_RTR_TYPE_DISABLED:
+	case MDB_RTR_TYPE_PERM:
+		br_mc_router_state_change(brmctx->br, val == MDB_RTR_TYPE_PERM);
+		del_timer(&brmctx->ip4_mc_router_timer);
+#if IS_ENABLED(CONFIG_IPV6)
+		del_timer(&brmctx->ip6_mc_router_timer);
+#endif
+		brmctx->multicast_router = val;
+		err = 0;
+		break;
+	case MDB_RTR_TYPE_TEMP_QUERY:
+		if (brmctx->multicast_router != MDB_RTR_TYPE_TEMP_QUERY)
+			br_mc_router_state_change(brmctx->br, false);
+		brmctx->multicast_router = val;
+		err = 0;
+		break;
+	}
+
+	spin_unlock_bh(&brmctx->br->multicast_lock);
+
+	return err;
+}
+
+static void
+br_multicast_rport_del_notify(struct net_bridge_mcast_port *pmctx, bool deleted)
+{
+	if (!deleted)
+		return;
+
+	/* For backwards compatibility for now, only notify if there is
+	 * no multicast router anymore for both IPv4 and IPv6.
+	 */
+	if (!hlist_unhashed(&pmctx->ip4_rlist))
+		return;
+#if IS_ENABLED(CONFIG_IPV6)
+	if (!hlist_unhashed(&pmctx->ip6_rlist))
+		return;
+#endif
+
+	br_rtr_notify(pmctx->port->br->dev, pmctx, RTM_DELMDB);
+	br_port_mc_router_state_change(pmctx->port, false);
+
+	/* don't allow timer refresh */
+	if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP)
+		pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
+}
+
+int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
+				 unsigned long val)
+{
+	struct net_bridge_mcast *brmctx;
+	unsigned long now = jiffies;
+	int err = -EINVAL;
+	bool del = false;
+
+	brmctx = br_multicast_port_ctx_get_global(pmctx);
+	spin_lock_bh(&brmctx->br->multicast_lock);
+	if (pmctx->multicast_router == val) {
+		/* Refresh the temp router port timer */
+		if (pmctx->multicast_router == MDB_RTR_TYPE_TEMP) {
+			mod_timer(&pmctx->ip4_mc_router_timer,
+				  now + brmctx->multicast_querier_interval);
+#if IS_ENABLED(CONFIG_IPV6)
+			mod_timer(&pmctx->ip6_mc_router_timer,
+				  now + brmctx->multicast_querier_interval);
+#endif
+		}
+		err = 0;
+		goto unlock;
+	}
+	switch (val) {
+	case MDB_RTR_TYPE_DISABLED:
+		pmctx->multicast_router = MDB_RTR_TYPE_DISABLED;
+		del |= br_ip4_multicast_rport_del(pmctx);
+		del_timer(&pmctx->ip4_mc_router_timer);
+		del |= br_ip6_multicast_rport_del(pmctx);
+#if IS_ENABLED(CONFIG_IPV6)
+		del_timer(&pmctx->ip6_mc_router_timer);
+#endif
+		br_multicast_rport_del_notify(pmctx, del);
+		break;
+	case MDB_RTR_TYPE_TEMP_QUERY:
+		pmctx->multicast_router = MDB_RTR_TYPE_TEMP_QUERY;
+		del |= br_ip4_multicast_rport_del(pmctx);
+		del |= br_ip6_multicast_rport_del(pmctx);
+		br_multicast_rport_del_notify(pmctx, del);
+		break;
+	case MDB_RTR_TYPE_PERM:
+		pmctx->multicast_router = MDB_RTR_TYPE_PERM;
+		del_timer(&pmctx->ip4_mc_router_timer);
+		br_ip4_multicast_add_router(brmctx, pmctx);
+#if IS_ENABLED(CONFIG_IPV6)
+		del_timer(&pmctx->ip6_mc_router_timer);
+#endif
+		br_ip6_multicast_add_router(brmctx, pmctx);
+		break;
+	case MDB_RTR_TYPE_TEMP:
+		pmctx->multicast_router = MDB_RTR_TYPE_TEMP;
+		br_ip4_multicast_mark_router(brmctx, pmctx);
+		br_ip6_multicast_mark_router(brmctx, pmctx);
+		break;
+	default:
+		goto unlock;
+	}
+	err = 0;
+unlock:
+	spin_unlock_bh(&brmctx->br->multicast_lock);
+
+	return err;
+}
+
+int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router)
+{
+	int err;
+
+	if (br_vlan_is_master(v))
+		err = br_multicast_set_router(&v->br_mcast_ctx, mcast_router);
+	else
+		err = br_multicast_set_port_router(&v->port_mcast_ctx,
+						   mcast_router);
+
+	return err;
+}
+
+static void br_multicast_start_querier(struct net_bridge_mcast *brmctx,
+				       struct bridge_mcast_own_query *query)
+{
+	struct net_bridge_port *port;
+
+	if (!br_multicast_ctx_matches_vlan_snooping(brmctx))
+		return;
+
+	__br_multicast_open_query(brmctx->br, query);
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(port, &brmctx->br->port_list, list) {
+		struct bridge_mcast_own_query *ip4_own_query;
+#if IS_ENABLED(CONFIG_IPV6)
+		struct bridge_mcast_own_query *ip6_own_query;
+#endif
+
+		if (br_multicast_port_ctx_state_stopped(&port->multicast_ctx))
+			continue;
+
+		if (br_multicast_ctx_is_vlan(brmctx)) {
+			struct net_bridge_vlan *vlan;
+
+			vlan = br_vlan_find(nbp_vlan_group_rcu(port),
+					    brmctx->vlan->vid);
+			if (!vlan ||
+			    br_multicast_port_ctx_state_stopped(&vlan->port_mcast_ctx))
+				continue;
+
+			ip4_own_query = &vlan->port_mcast_ctx.ip4_own_query;
+#if IS_ENABLED(CONFIG_IPV6)
+			ip6_own_query = &vlan->port_mcast_ctx.ip6_own_query;
+#endif
+		} else {
+			ip4_own_query = &port->multicast_ctx.ip4_own_query;
+#if IS_ENABLED(CONFIG_IPV6)
+			ip6_own_query = &port->multicast_ctx.ip6_own_query;
+#endif
+		}
+
+		if (query == &brmctx->ip4_own_query)
+			br_multicast_enable(ip4_own_query);
+#if IS_ENABLED(CONFIG_IPV6)
+		else
+			br_multicast_enable(ip6_own_query);
+#endif
+	}
+	rcu_read_unlock();
+}
+
+int br_multicast_toggle(struct net_bridge *br, unsigned long val,
+			struct netlink_ext_ack *extack)
+{
+	struct net_bridge_port *port;
+	bool change_snoopers = false;
+	int err = 0;
+
+	spin_lock_bh(&br->multicast_lock);
+	if (!!br_opt_get(br, BROPT_MULTICAST_ENABLED) == !!val)
+		goto unlock;
+
+	err = br_mc_disabled_update(br->dev, val, extack);
+	if (err == -EOPNOTSUPP)
+		err = 0;
+	if (err)
+		goto unlock;
+
+	br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val);
+	if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) {
+		change_snoopers = true;
+		goto unlock;
+	}
+
+	if (!netif_running(br->dev))
+		goto unlock;
+
+	br_multicast_open(br);
+	list_for_each_entry(port, &br->port_list, list)
+		__br_multicast_enable_port_ctx(&port->multicast_ctx);
+
+	change_snoopers = true;
+
+unlock:
+	spin_unlock_bh(&br->multicast_lock);
+
+	/* br_multicast_join_snoopers has the potential to cause
+	 * an MLD Report/Leave to be delivered to br_multicast_rcv,
+	 * which would in turn call br_multicast_add_group, which would
+	 * attempt to acquire multicast_lock. This function should be
+	 * called after the lock has been released to avoid deadlocks on
+	 * multicast_lock.
+	 *
+	 * br_multicast_leave_snoopers does not have the problem since
+	 * br_multicast_rcv first checks BROPT_MULTICAST_ENABLED, and
+	 * returns without calling br_multicast_ipv4/6_rcv if it's not
+	 * enabled. Moved both functions out just for symmetry.
+	 */
+	if (change_snoopers) {
+		if (br_opt_get(br, BROPT_MULTICAST_ENABLED))
+			br_multicast_join_snoopers(br);
+		else
+			br_multicast_leave_snoopers(br);
+	}
+
+	return err;
+}
+
+bool br_multicast_enabled(const struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+
+	return !!br_opt_get(br, BROPT_MULTICAST_ENABLED);
+}
+EXPORT_SYMBOL_GPL(br_multicast_enabled);
+
+bool br_multicast_router(const struct net_device *dev)
+{
+	struct net_bridge *br = netdev_priv(dev);
+	bool is_router;
+
+	spin_lock_bh(&br->multicast_lock);
+	is_router = br_multicast_is_router(&br->multicast_ctx, NULL);
+	spin_unlock_bh(&br->multicast_lock);
+	return is_router;
+}
+EXPORT_SYMBOL_GPL(br_multicast_router);
+
+int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val)
+{
+	unsigned long max_delay;
+
+	val = !!val;
+
+	spin_lock_bh(&brmctx->br->multicast_lock);
+	if (brmctx->multicast_querier == val)
+		goto unlock;
+
+	WRITE_ONCE(brmctx->multicast_querier, val);
+	if (!val)
+		goto unlock;
+
+	max_delay = brmctx->multicast_query_response_interval;
+
+	if (!timer_pending(&brmctx->ip4_other_query.timer))
+		brmctx->ip4_other_query.delay_time = jiffies + max_delay;
+
+	br_multicast_start_querier(brmctx, &brmctx->ip4_own_query);
+
+#if IS_ENABLED(CONFIG_IPV6)
+	if (!timer_pending(&brmctx->ip6_other_query.timer))
+		brmctx->ip6_other_query.delay_time = jiffies + max_delay;
+
+	br_multicast_start_querier(brmctx, &brmctx->ip6_own_query);
+#endif
+
+unlock:
+	spin_unlock_bh(&brmctx->br->multicast_lock);
+
+	return 0;
+}
+
+int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
+				  unsigned long val)
+{
+	/* Currently we support only version 2 and 3 */
+	switch (val) {
+	case 2:
+	case 3:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&brmctx->br->multicast_lock);
+	brmctx->multicast_igmp_version = val;
+	spin_unlock_bh(&brmctx->br->multicast_lock);
+
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
+				 unsigned long val)
+{
+	/* Currently we support version 1 and 2 */
+	switch (val) {
+	case 1:
+	case 2:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&brmctx->br->multicast_lock);
+	brmctx->multicast_mld_version = val;
+	spin_unlock_bh(&brmctx->br->multicast_lock);
+
+	return 0;
+}
+#endif
+
+void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
+				  unsigned long val)
+{
+	unsigned long intvl_jiffies = clock_t_to_jiffies(val);
+
+	if (intvl_jiffies < BR_MULTICAST_QUERY_INTVL_MIN) {
+		br_info(brmctx->br,
+			"trying to set multicast query interval below minimum, setting to %lu (%ums)\n",
+			jiffies_to_clock_t(BR_MULTICAST_QUERY_INTVL_MIN),
+			jiffies_to_msecs(BR_MULTICAST_QUERY_INTVL_MIN));
+		intvl_jiffies = BR_MULTICAST_QUERY_INTVL_MIN;
+	}
+
+	brmctx->multicast_query_interval = intvl_jiffies;
+}
+
+void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
+					  unsigned long val)
+{
+	unsigned long intvl_jiffies = clock_t_to_jiffies(val);
+
+	if (intvl_jiffies < BR_MULTICAST_STARTUP_QUERY_INTVL_MIN) {
+		br_info(brmctx->br,
+			"trying to set multicast startup query interval below minimum, setting to %lu (%ums)\n",
+			jiffies_to_clock_t(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN),
+			jiffies_to_msecs(BR_MULTICAST_STARTUP_QUERY_INTVL_MIN));
+		intvl_jiffies = BR_MULTICAST_STARTUP_QUERY_INTVL_MIN;
+	}
+
+	brmctx->multicast_startup_query_interval = intvl_jiffies;
+}
+
+/**
+ * br_multicast_list_adjacent - Returns snooped multicast addresses
+ * @dev:	The bridge port adjacent to which to retrieve addresses
+ * @br_ip_list:	The list to store found, snooped multicast IP addresses in
+ *
+ * Creates a list of IP addresses (struct br_ip_list) sensed by the multicast
+ * snooping feature on all bridge ports of dev's bridge device, excluding
+ * the addresses from dev itself.
+ *
+ * Returns the number of items added to br_ip_list.
+ *
+ * Notes:
+ * - br_ip_list needs to be initialized by caller
+ * - br_ip_list might contain duplicates in the end
+ *   (needs to be taken care of by caller)
+ * - br_ip_list needs to be freed by caller
+ */
+int br_multicast_list_adjacent(struct net_device *dev,
+			       struct list_head *br_ip_list)
+{
+	struct net_bridge *br;
+	struct net_bridge_port *port;
+	struct net_bridge_port_group *group;
+	struct br_ip_list *entry;
+	int count = 0;
+
+	rcu_read_lock();
+	if (!br_ip_list || !netif_is_bridge_port(dev))
+		goto unlock;
+
+	port = br_port_get_rcu(dev);
+	if (!port || !port->br)
+		goto unlock;
+
+	br = port->br;
+
+	list_for_each_entry_rcu(port, &br->port_list, list) {
+		if (!port->dev || port->dev == dev)
+			continue;
+
+		hlist_for_each_entry_rcu(group, &port->mglist, mglist) {
+			entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+			if (!entry)
+				goto unlock;
+
+			entry->addr = group->key.addr;
+			list_add(&entry->list, br_ip_list);
+			count++;
+		}
+	}
+
+unlock:
+	rcu_read_unlock();
+	return count;
+}
+EXPORT_SYMBOL_GPL(br_multicast_list_adjacent);
+
+/**
+ * br_multicast_has_querier_anywhere - Checks for a querier on a bridge
+ * @dev: The bridge port providing the bridge on which to check for a querier
+ * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
+ *
+ * Checks whether the given interface has a bridge on top and if so returns
+ * true if a valid querier exists anywhere on the bridged link layer.
+ * Otherwise returns false.
+ */
+bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto)
+{
+	struct net_bridge *br;
+	struct net_bridge_port *port;
+	struct ethhdr eth;
+	bool ret = false;
+
+	rcu_read_lock();
+	if (!netif_is_bridge_port(dev))
+		goto unlock;
+
+	port = br_port_get_rcu(dev);
+	if (!port || !port->br)
+		goto unlock;
+
+	br = port->br;
+
+	memset(&eth, 0, sizeof(eth));
+	eth.h_proto = htons(proto);
+
+	ret = br_multicast_querier_exists(&br->multicast_ctx, &eth, NULL);
+
+unlock:
+	rcu_read_unlock();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(br_multicast_has_querier_anywhere);
+
+/**
+ * br_multicast_has_querier_adjacent - Checks for a querier behind a bridge port
+ * @dev: The bridge port adjacent to which to check for a querier
+ * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
+ *
+ * Checks whether the given interface has a bridge on top and if so returns
+ * true if a selected querier is behind one of the other ports of this
+ * bridge. Otherwise returns false.
+ */
+bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto)
+{
+	struct net_bridge_mcast *brmctx;
+	struct net_bridge *br;
+	struct net_bridge_port *port;
+	bool ret = false;
+	int port_ifidx;
+
+	rcu_read_lock();
+	if (!netif_is_bridge_port(dev))
+		goto unlock;
+
+	port = br_port_get_rcu(dev);
+	if (!port || !port->br)
+		goto unlock;
+
+	br = port->br;
+	brmctx = &br->multicast_ctx;
+
+	switch (proto) {
+	case ETH_P_IP:
+		port_ifidx = brmctx->ip4_querier.port_ifidx;
+		if (!timer_pending(&brmctx->ip4_other_query.timer) ||
+		    port_ifidx == port->dev->ifindex)
+			goto unlock;
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case ETH_P_IPV6:
+		port_ifidx = brmctx->ip6_querier.port_ifidx;
+		if (!timer_pending(&brmctx->ip6_other_query.timer) ||
+		    port_ifidx == port->dev->ifindex)
+			goto unlock;
+		break;
+#endif
+	default:
+		goto unlock;
+	}
+
+	ret = true;
+unlock:
+	rcu_read_unlock();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(br_multicast_has_querier_adjacent);
+
+/**
+ * br_multicast_has_router_adjacent - Checks for a router behind a bridge port
+ * @dev: The bridge port adjacent to which to check for a multicast router
+ * @proto: The protocol family to check for: IGMP -> ETH_P_IP, MLD -> ETH_P_IPV6
+ *
+ * Checks whether the given interface has a bridge on top and if so returns
+ * true if a multicast router is behind one of the other ports of this
+ * bridge. Otherwise returns false.
+ */
+bool br_multicast_has_router_adjacent(struct net_device *dev, int proto)
+{
+	struct net_bridge_mcast_port *pmctx;
+	struct net_bridge_mcast *brmctx;
+	struct net_bridge_port *port;
+	bool ret = false;
+
+	rcu_read_lock();
+	port = br_port_get_check_rcu(dev);
+	if (!port)
+		goto unlock;
+
+	brmctx = &port->br->multicast_ctx;
+	switch (proto) {
+	case ETH_P_IP:
+		hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
+					 ip4_rlist) {
+			if (pmctx->port == port)
+				continue;
+
+			ret = true;
+			goto unlock;
+		}
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case ETH_P_IPV6:
+		hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
+					 ip6_rlist) {
+			if (pmctx->port == port)
+				continue;
+
+			ret = true;
+			goto unlock;
+		}
+		break;
+#endif
+	default:
+		/* when compiled without IPv6 support, be conservative and
+		 * always assume presence of an IPv6 multicast router
+		 */
+		ret = true;
+	}
+
+unlock:
+	rcu_read_unlock();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);
+
+static void br_mcast_stats_add(struct bridge_mcast_stats __percpu *stats,
+			       const struct sk_buff *skb, u8 type, u8 dir)
+{
+	struct bridge_mcast_stats *pstats = this_cpu_ptr(stats);
+	__be16 proto = skb->protocol;
+	unsigned int t_len;
+
+	u64_stats_update_begin(&pstats->syncp);
+	switch (proto) {
+	case htons(ETH_P_IP):
+		t_len = ntohs(ip_hdr(skb)->tot_len) - ip_hdrlen(skb);
+		switch (type) {
+		case IGMP_HOST_MEMBERSHIP_REPORT:
+			pstats->mstats.igmp_v1reports[dir]++;
+			break;
+		case IGMPV2_HOST_MEMBERSHIP_REPORT:
+			pstats->mstats.igmp_v2reports[dir]++;
+			break;
+		case IGMPV3_HOST_MEMBERSHIP_REPORT:
+			pstats->mstats.igmp_v3reports[dir]++;
+			break;
+		case IGMP_HOST_MEMBERSHIP_QUERY:
+			if (t_len != sizeof(struct igmphdr)) {
+				pstats->mstats.igmp_v3queries[dir]++;
+			} else {
+				unsigned int offset = skb_transport_offset(skb);
+				struct igmphdr *ih, _ihdr;
+
+				ih = skb_header_pointer(skb, offset,
+							sizeof(_ihdr), &_ihdr);
+				if (!ih)
+					break;
+				if (!ih->code)
+					pstats->mstats.igmp_v1queries[dir]++;
+				else
+					pstats->mstats.igmp_v2queries[dir]++;
+			}
+			break;
+		case IGMP_HOST_LEAVE_MESSAGE:
+			pstats->mstats.igmp_leaves[dir]++;
+			break;
+		}
+		break;
+#if IS_ENABLED(CONFIG_IPV6)
+	case htons(ETH_P_IPV6):
+		t_len = ntohs(ipv6_hdr(skb)->payload_len) +
+			sizeof(struct ipv6hdr);
+		t_len -= skb_network_header_len(skb);
+		switch (type) {
+		case ICMPV6_MGM_REPORT:
+			pstats->mstats.mld_v1reports[dir]++;
+			break;
+		case ICMPV6_MLD2_REPORT:
+			pstats->mstats.mld_v2reports[dir]++;
+			break;
+		case ICMPV6_MGM_QUERY:
+			if (t_len != sizeof(struct mld_msg))
+				pstats->mstats.mld_v2queries[dir]++;
+			else
+				pstats->mstats.mld_v1queries[dir]++;
+			break;
+		case ICMPV6_MGM_REDUCTION:
+			pstats->mstats.mld_leaves[dir]++;
+			break;
+		}
+		break;
+#endif /* CONFIG_IPV6 */
+	}
+	u64_stats_update_end(&pstats->syncp);
+}
+
+void br_multicast_count(struct net_bridge *br,
+			const struct net_bridge_port *p,
+			const struct sk_buff *skb, u8 type, u8 dir)
+{
+	struct bridge_mcast_stats __percpu *stats;
+
+	/* if multicast_disabled is true then igmp type can't be set */
+	if (!type || !br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED))
+		return;
+
+	if (p)
+		stats = p->mcast_stats;
+	else
+		stats = br->mcast_stats;
+	if (WARN_ON(!stats))
+		return;
+
+	br_mcast_stats_add(stats, skb, type, dir);
+}
+
+int br_multicast_init_stats(struct net_bridge *br)
+{
+	br->mcast_stats = netdev_alloc_pcpu_stats(struct bridge_mcast_stats);
+	if (!br->mcast_stats)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void br_multicast_uninit_stats(struct net_bridge *br)
+{
+	free_percpu(br->mcast_stats);
+}
+
+/* noinline for https://bugs.llvm.org/show_bug.cgi?id=45802#c9 */
+static noinline_for_stack void mcast_stats_add_dir(u64 *dst, u64 *src)
+{
+	dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
+	dst[BR_MCAST_DIR_TX] += src[BR_MCAST_DIR_TX];
+}
+
+void br_multicast_get_stats(const struct net_bridge *br,
+			    const struct net_bridge_port *p,
+			    struct br_mcast_stats *dest)
+{
+	struct bridge_mcast_stats __percpu *stats;
+	struct br_mcast_stats tdst;
+	int i;
+
+	memset(dest, 0, sizeof(*dest));
+	if (p)
+		stats = p->mcast_stats;
+	else
+		stats = br->mcast_stats;
+	if (WARN_ON(!stats))
+		return;
+
+	memset(&tdst, 0, sizeof(tdst));
+	for_each_possible_cpu(i) {
+		struct bridge_mcast_stats *cpu_stats = per_cpu_ptr(stats, i);
+		struct br_mcast_stats temp;
+		unsigned int start;
+
+		do {
+			start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
+			memcpy(&temp, &cpu_stats->mstats, sizeof(temp));
+		} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
+
+		mcast_stats_add_dir(tdst.igmp_v1queries, temp.igmp_v1queries);
+		mcast_stats_add_dir(tdst.igmp_v2queries, temp.igmp_v2queries);
+		mcast_stats_add_dir(tdst.igmp_v3queries, temp.igmp_v3queries);
+		mcast_stats_add_dir(tdst.igmp_leaves, temp.igmp_leaves);
+		mcast_stats_add_dir(tdst.igmp_v1reports, temp.igmp_v1reports);
+		mcast_stats_add_dir(tdst.igmp_v2reports, temp.igmp_v2reports);
+		mcast_stats_add_dir(tdst.igmp_v3reports, temp.igmp_v3reports);
+		tdst.igmp_parse_errors += temp.igmp_parse_errors;
+
+		mcast_stats_add_dir(tdst.mld_v1queries, temp.mld_v1queries);
+		mcast_stats_add_dir(tdst.mld_v2queries, temp.mld_v2queries);
+		mcast_stats_add_dir(tdst.mld_leaves, temp.mld_leaves);
+		mcast_stats_add_dir(tdst.mld_v1reports, temp.mld_v1reports);
+		mcast_stats_add_dir(tdst.mld_v2reports, temp.mld_v2reports);
+		tdst.mld_parse_errors += temp.mld_parse_errors;
+	}
+	memcpy(dest, &tdst, sizeof(*dest));
+}
+
+int br_mdb_hash_init(struct net_bridge *br)
+{
+	int err;
+
+	err = rhashtable_init(&br->sg_port_tbl, &br_sg_port_rht_params);
+	if (err)
+		return err;
+
+	err = rhashtable_init(&br->mdb_hash_tbl, &br_mdb_rht_params);
+	if (err) {
+		rhashtable_destroy(&br->sg_port_tbl);
+		return err;
+	}
+
+	return 0;
+}
+
+void br_mdb_hash_fini(struct net_bridge *br)
+{
+	rhashtable_destroy(&br->sg_port_tbl);
+	rhashtable_destroy(&br->mdb_hash_tbl);
+}