kernel: disable multicast-to-unicast translation for ipv6 neighbor solicitation (#17625)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

Backport of r43736

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@43737 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 20 insertions, 17 deletions

diff --git a/target/linux/generic/patches-3.10/645-bridge_multicast_to_unicast.patch b/target/linux/generic/patches-3.10/645-bridge_multicast_to_unicast.patch
index 9ee6b01df0..283157ac97 100644
--- a/target/linux/generic/patches-3.10/645-bridge_multicast_to_unicast.patch
+++ b/target/linux/generic/patches-3.10/645-bridge_multicast_to_unicast.patch
@@ -87,16 +87,19 @@
  {
  	struct br_ip br_group;
  
-@@ -735,7 +757,7 @@ static int br_ip6_multicast_add_group(st
+@@ -735,7 +757,10 @@ static int br_ip6_multicast_add_group(st
  	br_group.proto = htons(ETH_P_IPV6);
  	br_group.vid = vid;
  
 -	return br_multicast_add_group(br, port, &br_group);
++	if (ipv6_addr_is_solict_mult(group))
++		src = NULL;
++
 +	return br_multicast_add_group(br, port, &br_group, src);
  }
  #endif
  
-@@ -949,6 +971,7 @@ static int br_ip4_multicast_igmp3_report
+@@ -949,6 +974,7 @@ static int br_ip4_multicast_igmp3_report
  					 struct net_bridge_port *port,
  					 struct sk_buff *skb)
  {
@@ -104,7 +107,7 @@
  	struct igmpv3_report *ih;
  	struct igmpv3_grec *grec;
  	int i;
-@@ -994,7 +1017,7 @@ static int br_ip4_multicast_igmp3_report
+@@ -994,7 +1020,7 @@ static int br_ip4_multicast_igmp3_report
  			continue;
  		}
  
@@ -113,7 +116,7 @@
  		if (err)
  			break;
  	}
-@@ -1007,6 +1030,7 @@ static int br_ip6_multicast_mld2_report(
+@@ -1007,6 +1033,7 @@ static int br_ip6_multicast_mld2_report(
  					struct net_bridge_port *port,
  					struct sk_buff *skb)
  {
@@ -121,7 +124,7 @@
  	struct icmp6hdr *icmp6h;
  	struct mld2_grec *grec;
  	int i;
-@@ -1057,7 +1081,7 @@ static int br_ip6_multicast_mld2_report(
+@@ -1057,7 +1084,7 @@ static int br_ip6_multicast_mld2_report(
  		}
  
  		err = br_ip6_multicast_add_group(br, port, &grec->grec_mca,
@@ -130,7 +133,7 @@
  		if (!err)
  			break;
  	}
-@@ -1302,7 +1326,8 @@ static void br_multicast_leave_group(str
+@@ -1302,7 +1329,8 @@ static void br_multicast_leave_group(str
  				     struct net_bridge_port *port,
  				     struct br_ip *group,
  				     struct bridge_mcast_querier *querier,
@@ -140,7 +143,7 @@
  {
  	struct net_bridge_mdb_htable *mdb;
  	struct net_bridge_mdb_entry *mp;
-@@ -1352,7 +1377,7 @@ static void br_multicast_leave_group(str
+@@ -1352,7 +1380,7 @@ static void br_multicast_leave_group(str
  		for (pp = &mp->ports;
  		     (p = mlock_dereference(*pp, br)) != NULL;
  		     pp = &p->next) {
@@ -149,7 +152,7 @@
  				continue;
  
  			rcu_assign_pointer(*pp, p->next);
-@@ -1386,7 +1411,7 @@ static void br_multicast_leave_group(str
+@@ -1386,7 +1414,7 @@ static void br_multicast_leave_group(str
  	for (p = mlock_dereference(mp->ports, br);
  	     p != NULL;
  	     p = mlock_dereference(p->next, br)) {
@@ -158,7 +161,7 @@
  			continue;
  
  		if (!hlist_unhashed(&p->mglist) &&
-@@ -1404,8 +1429,8 @@ out:
+@@ -1404,8 +1432,8 @@ out:
  
  static void br_ip4_multicast_leave_group(struct net_bridge *br,
  					 struct net_bridge_port *port,
@@ -169,7 +172,7 @@
  {
  	struct br_ip br_group;
  	struct bridge_mcast_query *query = port ? &port->ip4_query :
-@@ -1418,14 +1443,15 @@ static void br_ip4_multicast_leave_group
+@@ -1418,14 +1446,15 @@ static void br_ip4_multicast_leave_group
  	br_group.proto = htons(ETH_P_IP);
  	br_group.vid = vid;
  
@@ -187,7 +190,7 @@
  {
  	struct br_ip br_group;
  	struct bridge_mcast_query *query = port ? &port->ip6_query :
-@@ -1439,7 +1465,8 @@ static void br_ip6_multicast_leave_group
+@@ -1439,7 +1468,8 @@ static void br_ip6_multicast_leave_group
  	br_group.proto = htons(ETH_P_IPV6);
  	br_group.vid = vid;
  
@@ -197,7 +200,7 @@
  }
  #endif
  
-@@ -1447,6 +1474,7 @@ static int br_multicast_ipv4_rcv(struct 
+@@ -1447,6 +1477,7 @@ static int br_multicast_ipv4_rcv(struct 
  				 struct net_bridge_port *port,
  				 struct sk_buff *skb)
  {
@@ -205,7 +208,7 @@
  	struct sk_buff *skb2 = skb;
  	const struct iphdr *iph;
  	struct igmphdr *ih;
-@@ -1522,7 +1550,7 @@ static int br_multicast_ipv4_rcv(struct 
+@@ -1522,7 +1553,7 @@ static int br_multicast_ipv4_rcv(struct 
  	case IGMP_HOST_MEMBERSHIP_REPORT:
  	case IGMPV2_HOST_MEMBERSHIP_REPORT:
  		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
@@ -214,7 +217,7 @@
  		break;
  	case IGMPV3_HOST_MEMBERSHIP_REPORT:
  		err = br_ip4_multicast_igmp3_report(br, port, skb2);
-@@ -1531,7 +1559,7 @@ static int br_multicast_ipv4_rcv(struct 
+@@ -1531,7 +1562,7 @@ static int br_multicast_ipv4_rcv(struct 
  		err = br_ip4_multicast_query(br, port, skb2);
  		break;
  	case IGMP_HOST_LEAVE_MESSAGE:
@@ -223,7 +226,7 @@
  		break;
  	}
  
-@@ -1548,6 +1576,7 @@ static int br_multicast_ipv6_rcv(struct 
+@@ -1548,6 +1579,7 @@ static int br_multicast_ipv6_rcv(struct 
  				 struct net_bridge_port *port,
  				 struct sk_buff *skb)
  {
@@ -231,7 +234,7 @@
  	struct sk_buff *skb2;
  	const struct ipv6hdr *ip6h;
  	u8 icmp6_type;
-@@ -1659,7 +1688,8 @@ static int br_multicast_ipv6_rcv(struct 
+@@ -1659,7 +1691,8 @@ static int br_multicast_ipv6_rcv(struct 
  		}
  		mld = (struct mld_msg *)skb_transport_header(skb2);
  		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
@@ -241,7 +244,7 @@
  		break;
  	    }
  	case ICMPV6_MLD2_REPORT:
-@@ -1676,7 +1706,7 @@ static int br_multicast_ipv6_rcv(struct 
+@@ -1676,7 +1709,7 @@ static int br_multicast_ipv6_rcv(struct 
  			goto out;
  		}
  		mld = (struct mld_msg *)skb_transport_header(skb2);