netfilter: nfnetlink: netns support

Make nfnl socket per-petns.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 9de0470..285e902 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -323,7 +323,8 @@
 			  NLMSG_DONE,
 			  sizeof(struct nfgenmsg));
 
-	status = nfnetlink_unicast(inst->skb, inst->peer_pid, MSG_DONTWAIT);
+	status = nfnetlink_unicast(inst->skb, &init_net, inst->peer_pid,
+				   MSG_DONTWAIT);
 
 	inst->qlen = 0;
 	inst->skb = NULL;