net/ipv6/fib6_notifier.c

   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
  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
  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
  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
  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
  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
  61 void __net_exit fib6_notifier_exit(struct net *net)
  62 {
  63         fib_notifier_ops_unregister(net->ipv6.notifier_ops);
  64 }