net/bridge/br.c

   1 /*
   2  *      Generic parts
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Lennert Buytenhek               <buytenh@gnu.org>
   7  *
   8  *      This program is free software; you can redistribute it and/or
   9  *      modify it under the terms of the GNU General Public License
  10  *      as published by the Free Software Foundation; either version
  11  *      2 of the License, or (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/etherdevice.h>
  18 #include <linux/init.h>
  19 #include <linux/llc.h>
  20 #include <net/llc.h>
  21 #include <net/stp.h>
  22
  23 #include "br_private.h"
  24
  25 static const struct stp_proto br_stp_proto = {
  26         .rcv    = br_stp_rcv,
  27 };
  28
  29 static struct pernet_operations br_net_ops = {
  30         .exit   = br_net_exit,
  31 };
  32
  33 static int __init br_init(void)
  34 {
  35         int err;
  36
  37         err = stp_proto_register(&br_stp_proto);
  38         if (err < 0) {
  39                 pr_err("bridge: can't register sap for STP\n");
  40                 return err;
  41         }
  42
  43         err = br_fdb_init();
  44         if (err)
  45                 goto err_out;
  46
  47         err = register_pernet_subsys(&br_net_ops);
  48         if (err)
  49                 goto err_out1;
  50
  51         err = br_netfilter_init();
  52         if (err)
  53                 goto err_out2;
  54
  55         err = register_netdevice_notifier(&br_device_notifier);
  56         if (err)
  57                 goto err_out3;
  58
  59         err = br_netlink_init();
  60         if (err)
  61                 goto err_out4;
  62
  63         brioctl_set(br_ioctl_deviceless_stub);
  64
  65 #if IS_ENABLED(CONFIG_ATM_LANE)
  66         br_fdb_test_addr_hook = br_fdb_test_addr;
  67 #endif
  68
  69         return 0;
  70 err_out4:
  71         unregister_netdevice_notifier(&br_device_notifier);
  72 err_out3:
  73         br_netfilter_fini();
  74 err_out2:
  75         unregister_pernet_subsys(&br_net_ops);
  76 err_out1:
  77         br_fdb_fini();
  78 err_out:
  79         stp_proto_unregister(&br_stp_proto);
  80         return err;
  81 }
  82
  83 static void __exit br_deinit(void)
  84 {
  85         stp_proto_unregister(&br_stp_proto);
  86
  87         br_netlink_fini();
  88         unregister_netdevice_notifier(&br_device_notifier);
  89         brioctl_set(NULL);
  90
  91         unregister_pernet_subsys(&br_net_ops);
  92
  93         rcu_barrier(); /* Wait for completion of call_rcu()'s */
  94
  95         br_netfilter_fini();
  96 #if IS_ENABLED(CONFIG_ATM_LANE)
  97         br_fdb_test_addr_hook = NULL;
  98 #endif
  99
 100         br_fdb_fini();
 101 }
 102
 103 module_init(br_init)
 104 module_exit(br_deinit)
 105 MODULE_LICENSE("GPL");
 106 MODULE_VERSION(BR_VERSION);
 107 MODULE_ALIAS_RTNL_LINK("bridge");