[NETNS]: Add netns to nl_info structure.

nl_info is used to track the end-user destination of routing change
notification. This is a natural object to hold a namespace on. Place
it there and utilize the context in the appropriate places.

Acked-by: Benjamin Thery <benjamin.thery@bull.net>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index d2b3cf6..48c8d7c 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -601,7 +601,9 @@
 
 int ip6_ins_rt(struct rt6_info *rt)
 {
-	struct nl_info info = {};
+	struct nl_info info = {
+		.nl_net = &init_net,
+	};
 	return __ip6_ins_rt(rt, &info);
 }
 
@@ -1259,7 +1261,9 @@
 
 int ip6_del_rt(struct rt6_info *rt)
 {
-	struct nl_info info = {};
+	struct nl_info info = {
+		.nl_net = &init_net,
+	};
 	return __ip6_del_rt(rt, &info);
 }