1 files changed, 599 insertions, 99 deletions

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index f29ada827a6..9d21d98ae5f 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -24,51 +24,139 @@
 #include <linux/slab.h>
 #include <linux/timer.h>
 #include <net/ip.h>
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#include <net/ipv6.h>
+#include <net/mld.h>
+#include <net/addrconf.h>
+#include <net/ip6_checksum.h>
+#endif
 
 #include "br_private.h"
 
-static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static inline int ipv6_is_local_multicast(const struct in6_addr *addr)
 {
-	return jhash_1word(mdb->secret, (u32)ip) & (mdb->max - 1);
+	if (ipv6_addr_is_multicast(addr) &&
+	    IPV6_ADDR_MC_SCOPE(addr) <= IPV6_ADDR_SCOPE_LINKLOCAL)
+		return 1;
+	return 0;
+}
+#endif
+
+static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
+{
+	if (a->proto != b->proto)
+		return 0;
+	switch (a->proto) {
+	case htons(ETH_P_IP):
+		return a->u.ip4 == b->u.ip4;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case htons(ETH_P_IPV6):
+		return ipv6_addr_equal(&a->u.ip6, &b->u.ip6);
+#endif
+	}
+	return 0;
+}
+
+static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
+{
+	return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1);
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb,
+				const struct in6_addr *ip)
+{
+	return jhash2((__force u32 *)ip->s6_addr32, 4, mdb->secret) & (mdb->max - 1);
+}
+#endif
+
+static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb,
+			     struct br_ip *ip)
+{
+	switch (ip->proto) {
+	case htons(ETH_P_IP):
+		return __br_ip4_hash(mdb, ip->u.ip4);
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case htons(ETH_P_IPV6):
+		return __br_ip6_hash(mdb, &ip->u.ip6);
+#endif
+	}
+	return 0;
 }
 
 static struct net_bridge_mdb_entry *__br_mdb_ip_get(
-	struct net_bridge_mdb_htable *mdb, __be32 dst, int hash)
+	struct net_bridge_mdb_htable *mdb, struct br_ip *dst, int hash)
 {
 	struct net_bridge_mdb_entry *mp;
 	struct hlist_node *p;
 
 	hlist_for_each_entry_rcu(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
-		if (dst == mp->addr)
+		if (br_ip_equal(&mp->addr, dst))
 			return mp;
 	}
 
 	return NULL;
 }
 
-static struct net_bridge_mdb_entry *br_mdb_ip_get(
+static struct net_bridge_mdb_entry *br_mdb_ip4_get(
 	struct net_bridge_mdb_htable *mdb, __be32 dst)
 {
-	if (!mdb)
-		return NULL;
+	struct br_ip br_dst;
+
+	br_dst.u.ip4 = dst;
+	br_dst.proto = htons(ETH_P_IP);
+
+	return __br_mdb_ip_get(mdb, &br_dst, __br_ip4_hash(mdb, dst));
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static struct net_bridge_mdb_entry *br_mdb_ip6_get(
+	struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst)
+{
+	struct br_ip br_dst;
 
+	ipv6_addr_copy(&br_dst.u.ip6, dst);
+	br_dst.proto = htons(ETH_P_IPV6);
+
+	return __br_mdb_ip_get(mdb, &br_dst, __br_ip6_hash(mdb, dst));
+}
+#endif
+
+static struct net_bridge_mdb_entry *br_mdb_ip_get(
+	struct net_bridge_mdb_htable *mdb, struct br_ip *dst)
+{
 	return __br_mdb_ip_get(mdb, dst, br_ip_hash(mdb, dst));
 }
 
 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 					struct sk_buff *skb)
 {
-	if (br->multicast_disabled)
+	struct net_bridge_mdb_htable *mdb = br->mdb;
+	struct br_ip ip;
+
+	if (!mdb || br->multicast_disabled)
+		return NULL;
+
+	if (BR_INPUT_SKB_CB(skb)->igmp)
 		return NULL;
 
+	ip.proto = skb->protocol;
+
 	switch (skb->protocol) {
 	case htons(ETH_P_IP):
-		if (BR_INPUT_SKB_CB(skb)->igmp)
-			break;
-		return br_mdb_ip_get(br->mdb, ip_hdr(skb)->daddr);
+		ip.u.ip4 = ip_hdr(skb)->daddr;
+		break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case htons(ETH_P_IPV6):
+		ipv6_addr_copy(&ip.u.ip6, &ipv6_hdr(skb)->daddr);
+		break;
+#endif
+	default:
+		return NULL;
 	}
 
-	return NULL;
+	return br_mdb_ip_get(mdb, &ip);
 }
 
 static void br_mdb_free(struct rcu_head *head)
@@ -95,7 +183,7 @@ static int br_mdb_copy(struct net_bridge_mdb_htable *new,
 	for (i = 0; i < old->max; i++)
 		hlist_for_each_entry(mp, p, &old->mhash[i], hlist[old->ver])
 			hlist_add_head(&mp->hlist[new->ver],
-				       &new->mhash[br_ip_hash(new, mp->addr)]);
+				       &new->mhash[br_ip_hash(new, &mp->addr)]);
 
 	if (!elasticity)
 		return 0;
@@ -163,7 +251,7 @@ static void br_multicast_del_pg(struct net_bridge *br,
 	struct net_bridge_port_group *p;
 	struct net_bridge_port_group **pp;
 
-	mp = br_mdb_ip_get(mdb, pg->addr);
+	mp = br_mdb_ip_get(mdb, &pg->addr);
 	if (WARN_ON(!mp))
 		return;
 
@@ -171,7 +259,7 @@ static void br_multicast_del_pg(struct net_bridge *br,
 		if (p != pg)
 			continue;
 
-		*pp = p->next;
+		rcu_assign_pointer(*pp, p->next);
 		hlist_del_init(&p->mglist);
 		del_timer(&p->timer);
 		del_timer(&p->query_timer);
@@ -249,8 +337,8 @@ out:
 	return 0;
 }
 
-static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
-						__be32 group)
+static struct sk_buff *br_ip4_multicast_alloc_query(struct net_bridge *br,
+						    __be32 group)
 {
 	struct sk_buff *skb;
 	struct igmphdr *ih;
@@ -314,12 +402,104 @@ out:
 	return skb;
 }
 
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br,
+						    struct in6_addr *group)
+{
+	struct sk_buff *skb;
+	struct ipv6hdr *ip6h;
+	struct mld_msg *mldq;
+	struct ethhdr *eth;
+	u8 *hopopt;
+	unsigned long interval;
+
+	skb = netdev_alloc_skb_ip_align(br->dev, sizeof(*eth) + sizeof(*ip6h) +
+						 8 + sizeof(*mldq));
+	if (!skb)
+		goto out;
+
+	skb->protocol = htons(ETH_P_IPV6);
+
+	/* Ethernet header */
+	skb_reset_mac_header(skb);
+	eth = eth_hdr(skb);
+
+	memcpy(eth->h_source, br->dev->dev_addr, 6);
+	ipv6_eth_mc_map(group, eth->h_dest);
+	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 = 8 + sizeof(*mldq);
+	ip6h->nexthdr = IPPROTO_HOPOPTS;
+	ip6h->hop_limit = 1;
+	ipv6_addr_set(&ip6h->saddr, 0, 0, 0, 0);
+	ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1));
+
+	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_PAD0;		/* Pad0 */
+	hopopt[7] = IPV6_TLV_PAD0;		/* Pad0 */
+
+	skb_put(skb, sizeof(*ip6h) + 8);
+
+	/* ICMPv6 */
+	skb_set_transport_header(skb, skb->len);
+	mldq = (struct mld_msg *) icmp6_hdr(skb);
+
+	interval = ipv6_addr_any(group) ? br->multicast_last_member_interval :
+					  br->multicast_query_response_interval;
+
+	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;
+	ipv6_addr_copy(&mldq->mld_mca, group);
+
+	/* checksum */
+	mldq->mld_cksum = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
+					  sizeof(*mldq), IPPROTO_ICMPV6,
+					  csum_partial(mldq,
+						       sizeof(*mldq), 0));
+	skb_put(skb, sizeof(*mldq));
+
+	__skb_pull(skb, sizeof(*eth));
+
+out:
+	return skb;
+}
+#endif
+
+static struct sk_buff *br_multicast_alloc_query(struct net_bridge *br,
+						struct br_ip *addr)
+{
+	switch (addr->proto) {
+	case htons(ETH_P_IP):
+		return br_ip4_multicast_alloc_query(br, addr->u.ip4);
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case htons(ETH_P_IPV6):
+		return br_ip6_multicast_alloc_query(br, &addr->u.ip6);
+#endif
+	}
+	return NULL;
+}
+
 static void br_multicast_send_group_query(struct net_bridge_mdb_entry *mp)
 {
 	struct net_bridge *br = mp->br;
 	struct sk_buff *skb;
 
-	skb = br_multicast_alloc_query(br, mp->addr);
+	skb = br_multicast_alloc_query(br, &mp->addr);
 	if (!skb)
 		goto timer;
 
@@ -353,7 +533,7 @@ static void br_multicast_send_port_group_query(struct net_bridge_port_group *pg)
 	struct net_bridge *br = port->br;
 	struct sk_buff *skb;
 
-	skb = br_multicast_alloc_query(br, pg->addr);
+	skb = br_multicast_alloc_query(br, &pg->addr);
 	if (!skb)
 		goto timer;
 
@@ -383,8 +563,8 @@ out:
 }
 
 static struct net_bridge_mdb_entry *br_multicast_get_group(
-	struct net_bridge *br, struct net_bridge_port *port, __be32 group,
-	int hash)
+	struct net_bridge *br, struct net_bridge_port *port,
+	struct br_ip *group, int hash)
 {
 	struct net_bridge_mdb_htable *mdb = br->mdb;
 	struct net_bridge_mdb_entry *mp;
@@ -396,9 +576,8 @@ static struct net_bridge_mdb_entry *br_multicast_get_group(
 
 	hlist_for_each_entry(mp, p, &mdb->mhash[hash], hlist[mdb->ver]) {
 		count++;
-		if (unlikely(group == mp->addr)) {
+		if (unlikely(br_ip_equal(group, &mp->addr)))
 			return mp;
-		}
 	}
 
 	elasticity = 0;
@@ -406,10 +585,9 @@ static struct net_bridge_mdb_entry *br_multicast_get_group(
 
 	if (unlikely(count > br->hash_elasticity && count)) {
 		if (net_ratelimit())
-			printk(KERN_INFO "%s: Multicast hash table "
-			       "chain limit reached: %s\n",
-			       br->dev->name, port ? port->dev->name :
-						     br->dev->name);
+			br_info(br, "Multicast hash table "
+				"chain limit reached: %s\n",
+				port ? port->dev->name : br->dev->name);
 
 		elasticity = br->hash_elasticity;
 	}
@@ -417,11 +595,9 @@ static struct net_bridge_mdb_entry *br_multicast_get_group(
 	if (mdb->size >= max) {
 		max *= 2;
 		if (unlikely(max >= br->hash_max)) {
-			printk(KERN_WARNING "%s: Multicast hash table maximum "
-			       "reached, disabling snooping: %s, %d\n",
-			       br->dev->name, port ? port->dev->name :
-						     br->dev->name,
-			       max);
+			br_warn(br, "Multicast hash table maximum "
+				"reached, disabling snooping: %s, %d\n",
+				port ? port->dev->name : br->dev->name, max);
 			err = -E2BIG;
 disable:
 			br->multicast_disabled = 1;
@@ -432,22 +608,19 @@ disable:
 	if (max > mdb->max || elasticity) {
 		if (mdb->old) {
 			if (net_ratelimit())
-				printk(KERN_INFO "%s: Multicast hash table "
-				       "on fire: %s\n",
-				       br->dev->name, port ? port->dev->name :
-							     br->dev->name);
+				br_info(br, "Multicast hash table "
+					"on fire: %s\n",
+					port ? port->dev->name : br->dev->name);
 			err = -EEXIST;
 			goto err;
 		}
 
 		err = br_mdb_rehash(&br->mdb, max, elasticity);
 		if (err) {
-			printk(KERN_WARNING "%s: Cannot rehash multicast "
-			       "hash table, disabling snooping: "
-			       "%s, %d, %d\n",
-			       br->dev->name, port ? port->dev->name :
-						     br->dev->name,
-			       mdb->size, err);
+			br_warn(br, "Cannot rehash multicast "
+				"hash table, disabling snooping: %s, %d, %d\n",
+				port ? port->dev->name : br->dev->name,
+				mdb->size, err);
 			goto disable;
 		}
 
@@ -463,7 +636,8 @@ err:
 }
 
 static struct net_bridge_mdb_entry *br_multicast_new_group(
-	struct net_bridge *br, struct net_bridge_port *port, __be32 group)
+	struct net_bridge *br, struct net_bridge_port *port,
+	struct br_ip *group)
 {
 	struct net_bridge_mdb_htable *mdb = br->mdb;
 	struct net_bridge_mdb_entry *mp;
@@ -496,7 +670,7 @@ rehash:
 		goto out;
 
 	mp->br = br;
-	mp->addr = group;
+	mp->addr = *group;
 	setup_timer(&mp->timer, br_multicast_group_expired,
 		    (unsigned long)mp);
 	setup_timer(&mp->query_timer, br_multicast_group_query_expired,
@@ -510,7 +684,8 @@ out:
 }
 
 static int br_multicast_add_group(struct net_bridge *br,
-				  struct net_bridge_port *port, __be32 group)
+				  struct net_bridge_port *port,
+				  struct br_ip *group)
 {
 	struct net_bridge_mdb_entry *mp;
 	struct net_bridge_port_group *p;
@@ -518,9 +693,6 @@ static int br_multicast_add_group(struct net_bridge *br,
 	unsigned long now = jiffies;
 	int err;
 
-	if (ipv4_is_local_multicast(group))
-		return 0;
-
 	spin_lock(&br->multicast_lock);
 	if (!netif_running(br->dev) ||
 	    (port && port->state == BR_STATE_DISABLED))
@@ -549,7 +721,7 @@ static int br_multicast_add_group(struct net_bridge *br,
 	if (unlikely(!p))
 		goto err;
 
-	p->addr = group;
+	p->addr = *group;
 	p->port = port;
 	p->next = *pp;
 	hlist_add_head(&p->mglist, &port->mglist);
@@ -570,6 +742,38 @@ err:
 	return err;
 }
 
+static int br_ip4_multicast_add_group(struct net_bridge *br,
+				      struct net_bridge_port *port,
+				      __be32 group)
+{
+	struct br_ip br_group;
+
+	if (ipv4_is_local_multicast(group))
+		return 0;
+
+	br_group.u.ip4 = group;
+	br_group.proto = htons(ETH_P_IP);
+
+	return br_multicast_add_group(br, port, &br_group);
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static int br_ip6_multicast_add_group(struct net_bridge *br,
+				      struct net_bridge_port *port,
+				      const struct in6_addr *group)
+{
+	struct br_ip br_group;
+
+	if (ipv6_is_local_multicast(group))
+		return 0;
+
+	ipv6_addr_copy(&br_group.u.ip6, group);
+	br_group.proto = htons(ETH_P_IP);
+
+	return br_multicast_add_group(br, port, &br_group);
+}
+#endif
+
 static void br_multicast_router_expired(unsigned long data)
 {
 	struct net_bridge_port *port = (void *)data;
@@ -591,29 +795,45 @@ static void br_multicast_local_router_expired(unsigned long data)
 {
 }
 
-static void br_multicast_send_query(struct net_bridge *br,
-				    struct net_bridge_port *port, u32 sent)
+static void __br_multicast_send_query(struct net_bridge *br,
+				      struct net_bridge_port *port,
+				      struct br_ip *ip)
 {
-	unsigned long time;
 	struct sk_buff *skb;
 
-	if (!netif_running(br->dev) || br->multicast_disabled ||
-	    timer_pending(&br->multicast_querier_timer))
-		return;
-
-	skb = br_multicast_alloc_query(br, 0);
+	skb = br_multicast_alloc_query(br, ip);
 	if (!skb)
-		goto timer;
+		return;
 
 	if (port) {
 		__skb_push(skb, sizeof(struct ethhdr));
 		skb->dev = port->dev;
-		NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
+		NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
 			dev_queue_xmit);
 	} else
 		netif_rx(skb);
+}
+
+static void br_multicast_send_query(struct net_bridge *br,
+				    struct net_bridge_port *port, u32 sent)
+{
+	unsigned long time;
+	struct br_ip br_group;
+
+	if (!netif_running(br->dev) || br->multicast_disabled ||
+	    timer_pending(&br->multicast_querier_timer))
+		return;
+
+	memset(&br_group.u, 0, sizeof(br_group.u));
+
+	br_group.proto = htons(ETH_P_IP);
+	__br_multicast_send_query(br, port, &br_group);
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	br_group.proto = htons(ETH_P_IPV6);
+	__br_multicast_send_query(br, port, &br_group);
+#endif
 
-timer:
 	time = jiffies;
 	time += sent < br->multicast_startup_query_count ?
 		br->multicast_startup_query_interval :
@@ -698,9 +918,9 @@ void br_multicast_disable_port(struct net_bridge_port *port)
 	spin_unlock(&br->multicast_lock);
 }
 
-static int br_multicast_igmp3_report(struct net_bridge *br,
-				     struct net_bridge_port *port,
-				     struct sk_buff *skb)
+static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
+					 struct net_bridge_port *port,
+					 struct sk_buff *skb)
 {
 	struct igmpv3_report *ih;
 	struct igmpv3_grec *grec;
@@ -727,7 +947,7 @@ static int br_multicast_igmp3_report(struct net_bridge *br,
 		group = grec->grec_mca;
 		type = grec->grec_type;
 
-		len += grec->grec_nsrcs * 4;
+		len += ntohs(grec->grec_nsrcs) * 4;
 		if (!pskb_may_pull(skb, len))
 			return -EINVAL;
 
@@ -745,7 +965,7 @@ static int br_multicast_igmp3_report(struct net_bridge *br,
 			continue;
 		}
 
-		err = br_multicast_add_group(br, port, group);
+		err = br_ip4_multicast_add_group(br, port, group);
 		if (err)
 			break;
 	}
@@ -753,24 +973,87 @@ static int br_multicast_igmp3_report(struct net_bridge *br,
 	return err;
 }
 
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static int br_ip6_multicast_mld2_report(struct net_bridge *br,
+					struct net_bridge_port *port,
+					struct sk_buff *skb)
+{
+	struct icmp6hdr *icmp6h;
+	struct mld2_grec *grec;
+	int i;
+	int len;
+	int num;
+	int err = 0;
+
+	if (!pskb_may_pull(skb, sizeof(*icmp6h)))
+		return -EINVAL;
+
+	icmp6h = icmp6_hdr(skb);
+	num = ntohs(icmp6h->icmp6_dataun.un_data16[1]);
+	len = sizeof(*icmp6h);
+
+	for (i = 0; i < num; i++) {
+		__be16 *nsrcs, _nsrcs;
+
+		nsrcs = skb_header_pointer(skb,
+					   len + offsetof(struct mld2_grec,
+							  grec_mca),
+					   sizeof(_nsrcs), &_nsrcs);
+		if (!nsrcs)
+			return -EINVAL;
+
+		if (!pskb_may_pull(skb,
+				   len + sizeof(*grec) +
+				   sizeof(struct in6_addr) * (*nsrcs)))
+			return -EINVAL;
+
+		grec = (struct mld2_grec *)(skb->data + len);
+		len += sizeof(*grec) + sizeof(struct in6_addr) * (*nsrcs);
+
+		/* We treat these as MLDv1 reports for now. */
+		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;
+		}
+
+		err = br_ip6_multicast_add_group(br, port, &grec->grec_mca);
+		if (!err)
+			break;
+	}
+
+	return err;
+}
+#endif
+
+/*
+ * Add port to rotuer_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 *br,
 				    struct net_bridge_port *port)
 {
-	struct hlist_node *p;
-	struct hlist_node **h;
-
-	for (h = &br->router_list.first;
-	     (p = *h) &&
-	     (unsigned long)container_of(p, struct net_bridge_port, rlist) >
-	     (unsigned long)port;
-	     h = &p->next)
-		;
-
-	port->rlist.pprev = h;
-	port->rlist.next = p;
-	rcu_assign_pointer(*h, &port->rlist);
-	if (p)
-		p->pprev = &port->rlist.next;
+	struct net_bridge_port *p;
+	struct hlist_node *n, *slot = NULL;
+
+	hlist_for_each_entry(p, n, &br->router_list, rlist) {
+		if ((unsigned long) port >= (unsigned long) p)
+			break;
+		slot = n;
+	}
+
+	if (slot)
+		hlist_add_after_rcu(slot, &port->rlist);
+	else
+		hlist_add_head_rcu(&port->rlist, &br->router_list);
 }
 
 static void br_multicast_mark_router(struct net_bridge *br,
@@ -800,7 +1083,7 @@ timer:
 
 static void br_multicast_query_received(struct net_bridge *br,
 					struct net_bridge_port *port,
-					__be32 saddr)
+					int saddr)
 {
 	if (saddr)
 		mod_timer(&br->multicast_querier_timer,
@@ -811,9 +1094,9 @@ static void br_multicast_query_received(struct net_bridge *br,
 	br_multicast_mark_router(br, port);
 }
 
-static int br_multicast_query(struct net_bridge *br,
-			      struct net_bridge_port *port,
-			      struct sk_buff *skb)
+static int br_ip4_multicast_query(struct net_bridge *br,
+				  struct net_bridge_port *port,
+				  struct sk_buff *skb)
 {
 	struct iphdr *iph = ip_hdr(skb);
 	struct igmphdr *ih = igmp_hdr(skb);
@@ -831,7 +1114,7 @@ static int br_multicast_query(struct net_bridge *br,
 	    (port && port->state == BR_STATE_DISABLED))
 		goto out;
 
-	br_multicast_query_received(br, port, iph->saddr);
+	br_multicast_query_received(br, port, !!iph->saddr);
 
 	group = ih->group;
 
@@ -859,7 +1142,7 @@ static int br_multicast_query(struct net_bridge *br,
 	if (!group)
 		goto out;
 
-	mp = br_mdb_ip_get(br->mdb, group);
+	mp = br_mdb_ip4_get(br->mdb, group);
 	if (!mp)
 		goto out;
 
@@ -883,9 +1166,78 @@ out:
 	return err;
 }
 
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static int br_ip6_multicast_query(struct net_bridge *br,
+				  struct net_bridge_port *port,
+				  struct sk_buff *skb)
+{
+	struct ipv6hdr *ip6h = ipv6_hdr(skb);
+	struct mld_msg *mld = (struct mld_msg *) icmp6_hdr(skb);
+	struct net_bridge_mdb_entry *mp;
+	struct mld2_query *mld2q;
+	struct net_bridge_port_group *p, **pp;
+	unsigned long max_delay;
+	unsigned long now = jiffies;
+	struct in6_addr *group = NULL;
+	int err = 0;
+
+	spin_lock(&br->multicast_lock);
+	if (!netif_running(br->dev) ||
+	    (port && port->state == BR_STATE_DISABLED))
+		goto out;
+
+	br_multicast_query_received(br, port, !ipv6_addr_any(&ip6h->saddr));
+
+	if (skb->len == sizeof(*mld)) {
+		if (!pskb_may_pull(skb, sizeof(*mld))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld = (struct mld_msg *) icmp6_hdr(skb);
+		max_delay = msecs_to_jiffies(htons(mld->mld_maxdelay));
+		if (max_delay)
+			group = &mld->mld_mca;
+	} else if (skb->len >= sizeof(*mld2q)) {
+		if (!pskb_may_pull(skb, sizeof(*mld2q))) {
+			err = -EINVAL;
+			goto out;
+		}
+		mld2q = (struct mld2_query *)icmp6_hdr(skb);
+		if (!mld2q->mld2q_nsrcs)
+			group = &mld2q->mld2q_mca;
+		max_delay = mld2q->mld2q_mrc ? MLDV2_MRC(mld2q->mld2q_mrc) : 1;
+	}
+
+	if (!group)
+		goto out;
+
+	mp = br_mdb_ip6_get(br->mdb, group);
+	if (!mp)
+		goto out;
+
+	max_delay *= br->multicast_last_member_count;
+	if (!hlist_unhashed(&mp->mglist) &&
+	    (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 = *pp); pp = &p->next) {
+		if (timer_pending(&p->timer) ?
+		    time_after(p->timer.expires, now + max_delay) :
+		    try_to_del_timer_sync(&p->timer) >= 0)
+			mod_timer(&mp->timer, now + max_delay);
+	}
+
+out:
+	spin_unlock(&br->multicast_lock);
+	return err;
+}
+#endif
+
 static void br_multicast_leave_group(struct net_bridge *br,
 				     struct net_bridge_port *port,
-				     __be32 group)
+				     struct br_ip *group)
 {
 	struct net_bridge_mdb_htable *mdb;
 	struct net_bridge_mdb_entry *mp;
@@ -893,9 +1245,6 @@ static void br_multicast_leave_group(struct net_bridge *br,
 	unsigned long now;
 	unsigned long time;
 
-	if (ipv4_is_local_multicast(group))
-		return;
-
 	spin_lock(&br->multicast_lock);
 	if (!netif_running(br->dev) ||
 	    (port && port->state == BR_STATE_DISABLED) ||
@@ -946,6 +1295,38 @@ out:
 	spin_unlock(&br->multicast_lock);
 }
 
+static void br_ip4_multicast_leave_group(struct net_bridge *br,
+					 struct net_bridge_port *port,
+					 __be32 group)
+{
+	struct br_ip br_group;
+
+	if (ipv4_is_local_multicast(group))
+		return;
+
+	br_group.u.ip4 = group;
+	br_group.proto = htons(ETH_P_IP);
+
+	br_multicast_leave_group(br, port, &br_group);
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static void br_ip6_multicast_leave_group(struct net_bridge *br,
+					 struct net_bridge_port *port,
+					 const struct in6_addr *group)
+{
+	struct br_ip br_group;
+
+	if (ipv6_is_local_multicast(group))
+		return;
+
+	ipv6_addr_copy(&br_group.u.ip6, group);
+	br_group.proto = htons(ETH_P_IPV6);
+
+	br_multicast_leave_group(br, port, &br_group);
+}
+#endif
+
 static int br_multicast_ipv4_rcv(struct net_bridge *br,
 				 struct net_bridge_port *port,
 				 struct sk_buff *skb)
@@ -957,9 +1338,6 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
 	unsigned offset;
 	int err;
 
-	BR_INPUT_SKB_CB(skb)->igmp = 0;
-	BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
-
 	/* We treat OOM as packet loss for now. */
 	if (!pskb_may_pull(skb, sizeof(*iph)))
 		return -EINVAL;
@@ -1003,8 +1381,6 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
 	if (!pskb_may_pull(skb2, sizeof(*ih)))
 		goto out;
 
-	iph = ip_hdr(skb2);
-
 	switch (skb2->ip_summed) {
 	case CHECKSUM_COMPLETE:
 		if (!csum_fold(skb2->csum))
@@ -1025,16 +1401,16 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
 	case IGMP_HOST_MEMBERSHIP_REPORT:
 	case IGMPV2_HOST_MEMBERSHIP_REPORT:
 		BR_INPUT_SKB_CB(skb2)->mrouters_only = 1;
-		err = br_multicast_add_group(br, port, ih->group);
+		err = br_ip4_multicast_add_group(br, port, ih->group);
 		break;
 	case IGMPV3_HOST_MEMBERSHIP_REPORT:
-		err = br_multicast_igmp3_report(br, port, skb2);
+		err = br_ip4_multicast_igmp3_report(br, port, skb2);
 		break;
 	case IGMP_HOST_MEMBERSHIP_QUERY:
-		err = br_multicast_query(br, port, skb2);
+		err = br_ip4_multicast_query(br, port, skb2);
 		break;
 	case IGMP_HOST_LEAVE_MESSAGE:
-		br_multicast_leave_group(br, port, ih->group);
+		br_ip4_multicast_leave_group(br, port, ih->group);
 		break;
 	}
 
@@ -1046,15 +1422,139 @@ err_out:
 	return err;
 }
 
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static int br_multicast_ipv6_rcv(struct net_bridge *br,
+				 struct net_bridge_port *port,
+				 struct sk_buff *skb)
+{
+	struct sk_buff *skb2 = skb;
+	struct ipv6hdr *ip6h;
+	struct icmp6hdr *icmp6h;
+	u8 nexthdr;
+	unsigned len;
+	unsigned offset;
+	int err;
+
+	if (!pskb_may_pull(skb, sizeof(*ip6h)))
+		return -EINVAL;
+
+	ip6h = ipv6_hdr(skb);
+
+	/*
+	 * We're interested in MLD messages only.
+	 *  - Version is 6
+	 *  - MLD has always Router Alert hop-by-hop option
+	 *  - But we do not support jumbrograms.
+	 */
+	if (ip6h->version != 6 ||
+	    ip6h->nexthdr != IPPROTO_HOPOPTS ||
+	    ip6h->payload_len == 0)
+		return 0;
+
+	len = ntohs(ip6h->payload_len);
+	if (skb->len < len)
+		return -EINVAL;
+
+	nexthdr = ip6h->nexthdr;
+	offset = ipv6_skip_exthdr(skb, sizeof(*ip6h), &nexthdr);
+
+	if (offset < 0 || nexthdr != IPPROTO_ICMPV6)
+		return 0;
+
+	/* Okay, we found ICMPv6 header */
+	skb2 = skb_clone(skb, GFP_ATOMIC);
+	if (!skb2)
+		return -ENOMEM;
+
+	len -= offset - skb_network_offset(skb2);
+
+	__skb_pull(skb2, offset);
+	skb_reset_transport_header(skb2);
+
+	err = -EINVAL;
+	if (!pskb_may_pull(skb2, sizeof(*icmp6h)))
+		goto out;
+
+	icmp6h = icmp6_hdr(skb2);
+
+	switch (icmp6h->icmp6_type) {
+	case ICMPV6_MGM_QUERY:
+	case ICMPV6_MGM_REPORT:
+	case ICMPV6_MGM_REDUCTION:
+	case ICMPV6_MLD2_REPORT:
+		break;
+	default:
+		err = 0;
+		goto out;
+	}
+
+	/* Okay, we found MLD message. Check further. */
+	if (skb2->len > len) {
+		err = pskb_trim_rcsum(skb2, len);
+		if (err)
+			goto out;
+	}
+
+	switch (skb2->ip_summed) {
+	case CHECKSUM_COMPLETE:
+		if (!csum_fold(skb2->csum))
+			break;
+		/*FALLTHROUGH*/
+	case CHECKSUM_NONE:
+		skb2->csum = 0;
+		if (skb_checksum_complete(skb2))
+			goto out;
+	}
+
+	err = 0;
+
+	BR_INPUT_SKB_CB(skb)->igmp = 1;
+
+	switch (icmp6h->icmp6_type) {
+	case ICMPV6_MGM_REPORT:
+	    {
+		struct mld_msg *mld = (struct mld_msg *)icmp6h;
+		BR_INPUT_SKB_CB(skb2)->mrouters_only = 1;
+		err = br_ip6_multicast_add_group(br, port, &mld->mld_mca);
+		break;
+	    }
+	case ICMPV6_MLD2_REPORT:
+		err = br_ip6_multicast_mld2_report(br, port, skb2);
+		break;
+	case ICMPV6_MGM_QUERY:
+		err = br_ip6_multicast_query(br, port, skb2);
+		break;
+	case ICMPV6_MGM_REDUCTION:
+	    {
+		struct mld_msg *mld = (struct mld_msg *)icmp6h;
+		br_ip6_multicast_leave_group(br, port, &mld->mld_mca);
+	    }
+	}
+
+out:
+	__skb_push(skb2, offset);
+	if (skb2 != skb)
+		kfree_skb(skb2);
+	return err;
+}
+#endif
+
 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 		     struct sk_buff *skb)
 {
+	BR_INPUT_SKB_CB(skb)->igmp = 0;
+	BR_INPUT_SKB_CB(skb)->mrouters_only = 0;
+
 	if (br->multicast_disabled)
 		return 0;
 
 	switch (skb->protocol) {
 	case htons(ETH_P_IP):
 		return br_multicast_ipv4_rcv(br, port, skb);
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case htons(ETH_P_IPV6):
+		return br_multicast_ipv6_rcv(br, port, skb);
+#endif
 	}
 
 	return 0;