[NETNS]: Add netns parameter to fib_rules_(un)register.

The patch extends the different fib rules API in order to pass the
network namespace pointer. That will allow to access the different
tables from a namespace relative object. As usual, the pointer to the
init_net variable is passed as parameter so we don't break the
network.

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>
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 9ce2e0a..e4d7e5a 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -273,7 +273,7 @@
 	if (ret)
 		goto out;
 
-	ret = fib_rules_register(&fib6_rules_ops);
+	ret = fib_rules_register(&init_net, &fib6_rules_ops);
 	if (ret)
 		goto out_default_rules_init;
 out:
@@ -286,5 +286,5 @@
 
 void fib6_rules_cleanup(void)
 {
-	fib_rules_unregister(&fib6_rules_ops);
+	fib_rules_unregister(&init_net, &fib6_rules_ops);
 }