[FIB]: Add netns to fib_rules_ops.

The backward link from FIB rules operations to the network namespace
will allow to simplify the API a bit.
Signed-off-by: NDenis V. Lunev <den@openvz.org>
Acked-by: NDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/fib_rules.h

@@ -67,6 +67,7 @@ struct fib_rules_ops
 	const struct nla_policy	*policy;
 	struct list_head	rules_list;
 	struct module		*owner;
+	struct net		*fro_net;
 };
 
 #define FRA_GENERIC_POLICY \

net/decnet/dn_rules.c

@@ -249,6 +249,7 @@ static struct fib_rules_ops dn_fib_rules_ops = {
 	.policy		= dn_fib_rule_policy,
 	.rules_list	= LIST_HEAD_INIT(dn_fib_rules_ops.rules_list),
 	.owner		= THIS_MODULE,
+	.fro_net	= &init_net,
 };
 
 void __init dn_fib_rules_init(void)

net/ipv4/fib_rules.c

@@ -315,6 +315,8 @@ int __net_init fib4_rules_init(struct net *net)
 	if (ops == NULL)
 		return -ENOMEM;
 	INIT_LIST_HEAD(&ops->rules_list);
+	ops->fro_net = net;
+
 	fib_rules_register(net, ops);
 
 	err = fib_default_rules_init(ops);

net/ipv6/fib6_rules.c

@@ -249,6 +249,7 @@ static struct fib_rules_ops fib6_rules_ops = {
 	.policy			= fib6_rule_policy,
 	.rules_list		= LIST_HEAD_INIT(fib6_rules_ops.rules_list),
 	.owner			= THIS_MODULE,
+	.fro_net		= &init_net,
 };
 
 static int __init fib6_default_rules_init(void)