[NETNS][IPV6] mcast - handle several network namespace

This patch make use of the network namespace information at the right
places to handle the multicast for several network namespaces.  It
makes the socket control to be per namespace too.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 53739de829db..d6e311f6c8eb 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -323,6 +323,9 @@ static struct sock *udp_v6_mcast_next(struct sock *sk,
         sk_for_each_from(s, node) {
                 struct inet_sock *inet = inet_sk(s);
 
+                if (s->sk_net != sk->sk_net)
+                        continue;
+
                 if (s->sk_hash == num && s->sk_family == PF_INET6) {
                         struct ipv6_pinfo *np = inet6_sk(s);
                         if (inet->dport) {