1  #include <linux/notifier.h>
2  #include <linux/socket.h>
3  #include <linux/kernel.h>
4  #include <linux/export.h>
5  #include <net/net_namespace.h>
6  #include <net/fib_notifier.h>
7  #include <net/netns/ipv6.h>
8  #include <net/ip6_fib.h>
9  
call_fib6_notifier(struct notifier_block * nb,enum fib_event_type event_type,struct fib_notifier_info * info)10  int call_fib6_notifier(struct notifier_block *nb,
11  		       enum fib_event_type event_type,
12  		       struct fib_notifier_info *info)
13  {
14  	info->family = AF_INET6;
15  	return call_fib_notifier(nb, event_type, info);
16  }
17  
call_fib6_notifiers(struct net * net,enum fib_event_type event_type,struct fib_notifier_info * info)18  int call_fib6_notifiers(struct net *net, enum fib_event_type event_type,
19  			struct fib_notifier_info *info)
20  {
21  	info->family = AF_INET6;
22  	return call_fib_notifiers(net, event_type, info);
23  }
24  
fib6_seq_read(struct net * net)25  static unsigned int fib6_seq_read(struct net *net)
26  {
27  	return fib6_tables_seq_read(net) + fib6_rules_seq_read(net);
28  }
29  
fib6_dump(struct net * net,struct notifier_block * nb,struct netlink_ext_ack * extack)30  static int fib6_dump(struct net *net, struct notifier_block *nb,
31  		     struct netlink_ext_ack *extack)
32  {
33  	int err;
34  
35  	err = fib6_rules_dump(net, nb, extack);
36  	if (err)
37  		return err;
38  
39  	return fib6_tables_dump(net, nb, extack);
40  }
41  
42  static const struct fib_notifier_ops fib6_notifier_ops_template = {
43  	.family		= AF_INET6,
44  	.fib_seq_read	= fib6_seq_read,
45  	.fib_dump	= fib6_dump,
46  	.owner		= THIS_MODULE,
47  };
48  
fib6_notifier_init(struct net * net)49  int __net_init fib6_notifier_init(struct net *net)
50  {
51  	struct fib_notifier_ops *ops;
52  
53  	ops = fib_notifier_ops_register(&fib6_notifier_ops_template, net);
54  	if (IS_ERR(ops))
55  		return PTR_ERR(ops);
56  	net->ipv6.notifier_ops = ops;
57  
58  	return 0;
59  }
60  
fib6_notifier_exit(struct net * net)61  void __net_exit fib6_notifier_exit(struct net *net)
62  {
63  	fib_notifier_ops_unregister(net->ipv6.notifier_ops);
64  }
65