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authorMadhu Challa <challa@noironetworks.com>2015-02-25 20:58:35 +0300
committerDavid S. Miller <davem@davemloft.net>2015-02-28 00:25:25 +0300
commit93a714d6b53d87872e552dbb273544bdeaaf6e12 (patch)
tree3cc79521cb6dbcd600384507329ecef93ae618ab /net/ipv6/mcast.c
parent46a4dee074b58c4256dbf6c2dbf199c372f85b04 (diff)
downloadlinux-93a714d6b53d87872e552dbb273544bdeaaf6e12.tar.xz
multicast: Extend ip address command to enable multicast group join/leave on
Joining multicast group on ethernet level via "ip maddr" command would not work if we have an Ethernet switch that does igmp snooping since the switch would not replicate multicast packets on ports that did not have IGMP reports for the multicast addresses. Linux vxlan interfaces created via "ip link add vxlan" have the group option that enables then to do the required join. By extending ip address command with option "autojoin" we can get similar functionality for openvswitch vxlan interfaces as well as other tunneling mechanisms that need to receive multicast traffic. The kernel code is structured similar to how the vxlan driver does a group join / leave. example: ip address add 224.1.1.10/24 dev eth5 autojoin ip address del 224.1.1.10/24 dev eth5 Signed-off-by: Madhu Challa <challa@noironetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/mcast.c')
-rw-r--r--net/ipv6/mcast.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index e4955d019734..1dd1fedff9f4 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -2929,20 +2929,32 @@ static int __net_init igmp6_net_init(struct net *net)
inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
+ err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6,
+ SOCK_RAW, IPPROTO_ICMPV6, net);
+ if (err < 0) {
+ pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n",
+ err);
+ goto out_sock_create;
+ }
+
err = igmp6_proc_init(net);
if (err)
- goto out_sock_create;
-out:
- return err;
+ goto out_sock_create_autojoin;
+
+ return 0;
+out_sock_create_autojoin:
+ inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk);
out_sock_create:
inet_ctl_sock_destroy(net->ipv6.igmp_sk);
- goto out;
+out:
+ return err;
}
static void __net_exit igmp6_net_exit(struct net *net)
{
inet_ctl_sock_destroy(net->ipv6.igmp_sk);
+ inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk);
igmp6_proc_exit(net);
}