[NETNS]: Add netns parameter to fib_select_default.

Currently fib_select_default calls fib_get_table() with the
init_net. Prepare it to provide a correct namespace to lookup default
route.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 13bf01d..7e3e732 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -116,7 +116,8 @@
 }
 #endif /* CONFIG_IP_MULTIPLE_TABLES */
 
-void fib_select_default(const struct flowi *flp, struct fib_result *res)
+void fib_select_default(struct net *net,
+			const struct flowi *flp, struct fib_result *res)
 {
 	struct fib_table *tb;
 	int table = RT_TABLE_MAIN;
@@ -125,7 +126,7 @@
 		return;
 	table = res->r->table;
 #endif
-	tb = fib_get_table(&init_net, table);
+	tb = fib_get_table(net, table);
 	if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
 		tb->tb_select_default(tb, flp, res);
 }