From: Li Wei <lw@cn.fujitsu.com>
Date: Mon, 5 Mar 2012 14:45:17 +0000 (+0000)
Subject: IPv6: Fix not join all-router mcast group when forwarding set.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d6ddef9e641d1229d4ec841dc75ae703171c3e92;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

IPv6: Fix not join all-router mcast group when forwarding set.

When forwarding was set and a new net device is register,
we need add this device to the all-router mcast group.

Signed-off-by: Li Wei <lw@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c02280a4d12..6b8ebc5da0e 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -434,6 +434,10 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
 	/* Join all-node multicast group */
 	ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
 
+	/* Join all-router multicast group if forwarding is set */
+	if (ndev->cnf.forwarding && dev && (dev->flags & IFF_MULTICAST))
+		ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
+
 	return ndev;
 }