LCOV - code coverage report
Current view: top level - net/ipv4 - fib_notifier.c (source / functions) Hit Total Coverage
Test: landlock.info Lines: 12 27 44.4 %
Date: 2021-04-22 12:43:58 Functions: 2 6 33.3 %

          Line data    Source code
       1             : // SPDX-License-Identifier: GPL-2.0
       2             : #include <linux/rtnetlink.h>
       3             : #include <linux/notifier.h>
       4             : #include <linux/socket.h>
       5             : #include <linux/kernel.h>
       6             : #include <linux/export.h>
       7             : #include <net/net_namespace.h>
       8             : #include <net/fib_notifier.h>
       9             : #include <net/netns/ipv4.h>
      10             : #include <net/ip_fib.h>
      11             : 
      12           0 : int call_fib4_notifier(struct notifier_block *nb,
      13             :                        enum fib_event_type event_type,
      14             :                        struct fib_notifier_info *info)
      15             : {
      16           0 :         info->family = AF_INET;
      17           0 :         return call_fib_notifier(nb, event_type, info);
      18             : }
      19             : 
      20          10 : int call_fib4_notifiers(struct net *net, enum fib_event_type event_type,
      21             :                         struct fib_notifier_info *info)
      22             : {
      23          10 :         ASSERT_RTNL();
      24             : 
      25          10 :         info->family = AF_INET;
      26          10 :         net->ipv4.fib_seq++;
      27          10 :         return call_fib_notifiers(net, event_type, info);
      28             : }
      29             : 
      30           0 : static unsigned int fib4_seq_read(struct net *net)
      31             : {
      32           0 :         ASSERT_RTNL();
      33             : 
      34           0 :         return net->ipv4.fib_seq + fib4_rules_seq_read(net);
      35             : }
      36             : 
      37           0 : static int fib4_dump(struct net *net, struct notifier_block *nb,
      38             :                      struct netlink_ext_ack *extack)
      39             : {
      40           0 :         int err;
      41             : 
      42           0 :         err = fib4_rules_dump(net, nb, extack);
      43           0 :         if (err)
      44             :                 return err;
      45             : 
      46           0 :         return fib_notify(net, nb, extack);
      47             : }
      48             : 
      49             : static const struct fib_notifier_ops fib4_notifier_ops_template = {
      50             :         .family         = AF_INET,
      51             :         .fib_seq_read   = fib4_seq_read,
      52             :         .fib_dump       = fib4_dump,
      53             :         .owner          = THIS_MODULE,
      54             : };
      55             : 
      56           1 : int __net_init fib4_notifier_init(struct net *net)
      57             : {
      58           1 :         struct fib_notifier_ops *ops;
      59             : 
      60           1 :         net->ipv4.fib_seq = 0;
      61             : 
      62           1 :         ops = fib_notifier_ops_register(&fib4_notifier_ops_template, net);
      63           1 :         if (IS_ERR(ops))
      64           0 :                 return PTR_ERR(ops);
      65           1 :         net->ipv4.notifier_ops = ops;
      66             : 
      67           1 :         return 0;
      68             : }
      69             : 
      70           0 : void __net_exit fib4_notifier_exit(struct net *net)
      71             : {
      72           0 :         fib_notifier_ops_unregister(net->ipv4.notifier_ops);
      73           0 : }

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