[NETNS][IPV6] route6 - make route6 per namespace

This patch makes the routing engine use the network namespaces to
access routing informations: Add a network namespace parameter to
ipv6_route_ioctl and propagate the network namespace value to all the
routing code that have not yet been changed.

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>
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 1444d35..2bcbfb8 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -49,7 +49,9 @@
 extern int			ip6_route_init(void);
 extern void			ip6_route_cleanup(void);
 
-extern int			ipv6_route_ioctl(unsigned int cmd, void __user *arg);
+extern int			ipv6_route_ioctl(struct net *net,
+						 unsigned int cmd,
+						 void __user *arg);
 
 extern int			ip6_route_add(struct fib6_config *cfg);
 extern int			ip6_ins_rt(struct rt6_info *);