[NETNS]: Add netns parameter to fib_get_table/fib_new_table.

This patch extends the fib_get_table and the fib_new_table functions
with the network namespace pointer. That will allow to access the
table relatively from the network namespace.

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/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 1aae61c8..49819fe 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -93,7 +93,7 @@
 		goto errout;
 	}
 
-	if ((tbl = fib_get_table(rule->table)) == NULL)
+	if ((tbl = fib_get_table(&init_net, rule->table)) == NULL)
 		goto errout;
 
 	err = tbl->tb_lookup(tbl, flp, (struct fib_result *) arg->result);
@@ -109,7 +109,7 @@
 	if (res->r && res->r->action == FR_ACT_TO_TBL &&
 	    FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) {
 		struct fib_table *tb;
-		if ((tb = fib_get_table(res->r->table)) != NULL)
+		if ((tb = fib_get_table(&init_net, res->r->table)) != NULL)
 			tb->tb_select_default(tb, flp, res);
 	}
 }
@@ -130,13 +130,13 @@
 	return 1;
 }
 
-static struct fib_table *fib_empty_table(void)
+static struct fib_table *fib_empty_table(struct net *net)
 {
 	u32 id;
 
 	for (id = 1; id <= RT_TABLE_MAX; id++)
-		if (fib_get_table(id) == NULL)
-			return fib_new_table(id);
+		if (fib_get_table(net, id) == NULL)
+			return fib_new_table(net, id);
 	return NULL;
 }
 
@@ -159,7 +159,7 @@
 		if (rule->action == FR_ACT_TO_TBL) {
 			struct fib_table *table;
 
-			table = fib_empty_table();
+			table = fib_empty_table(&init_net);
 			if (table == NULL) {
 				err = -ENOBUFS;
 				goto errout;