[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>

include/net/fib_rules.h

@@ -101,8 +101,8 @@ static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
 	return frh->table;
 }
 
-extern int			fib_rules_register(struct fib_rules_ops *);
-extern int			fib_rules_unregister(struct fib_rules_ops *);
+extern int fib_rules_register(struct net *, struct fib_rules_ops *);
+extern int fib_rules_unregister(struct net *, struct fib_rules_ops *);
 extern void                     fib_rules_cleanup_ops(struct fib_rules_ops *);
 
 extern int			fib_rules_lookup(struct fib_rules_ops *,

net/core/fib_rules.c

@@ -74,7 +74,7 @@ static void flush_route_cache(struct fib_rules_ops *ops)
 		ops->flush_cache();
 }
 
-int fib_rules_register(struct fib_rules_ops *ops)
+int fib_rules_register(struct net *net, struct fib_rules_ops *ops)
 {
 	int err = -EEXIST;
 	struct fib_rules_ops *o;
@@ -113,7 +113,7 @@ void fib_rules_cleanup_ops(struct fib_rules_ops *ops)
 }
 EXPORT_SYMBOL_GPL(fib_rules_cleanup_ops);
 
-int fib_rules_unregister(struct fib_rules_ops *ops)
+int fib_rules_unregister(struct net *net, struct fib_rules_ops *ops)
 {
 	int err = 0;
 	struct fib_rules_ops *o;

net/decnet/dn_rules.c

@@ -255,12 +255,12 @@ void __init dn_fib_rules_init(void)
 {
 	BUG_ON(fib_default_rule_add(&dn_fib_rules_ops, 0x7fff,
 			            RT_TABLE_MAIN, 0));
-	fib_rules_register(&dn_fib_rules_ops);
+	fib_rules_register(&init_net, &dn_fib_rules_ops);
 }
 
 void __exit dn_fib_rules_cleanup(void)
 {
-	fib_rules_unregister(&dn_fib_rules_ops);
+	fib_rules_unregister(&init_net, &dn_fib_rules_ops);
 }
 
 

net/ipv4/fib_rules.c

@@ -314,5 +314,5 @@ static int __init fib_default_rules_init(void)
 void __init fib4_rules_init(void)
 {
 	BUG_ON(fib_default_rules_init());
-	fib_rules_register(&fib4_rules_ops);
+	fib_rules_register(&init_net, &fib4_rules_ops);
 }

net/ipv6/fib6_rules.c

@@ -273,7 +273,7 @@ int __init fib6_rules_init(void)
 	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 @@ out_default_rules_init:
 
 void fib6_rules_cleanup(void)
 {
-	fib_rules_unregister(&fib6_rules_ops);
+	fib_rules_unregister(&init_net, &fib6_rules_ops);
 }