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 int (*br_should_route_hook)(struct sk_buff *skb);
  26
  27 static const struct stp_proto br_stp_proto = {
  28         .rcv    = br_stp_rcv,
  29 };
  30
  31 static int __init br_init(void)
  32 {
  33         int err;
  34
  35         err = stp_proto_register(&br_stp_proto);
  36         if (err < 0) {
  37                 printk(KERN_ERR "bridge: can't register sap for STP\n");
  38                 return err;
  39         }
  40
  41         err = br_fdb_init();
  42         if (err)
  43                 goto err_out;
  44
  45         err = br_netfilter_init();
  46         if (err)
  47                 goto err_out1;
  48
  49         err = register_netdevice_notifier(&br_device_notifier);
  50         if (err)
  51                 goto err_out2;
  52
  53         err = br_netlink_init();
  54         if (err)
  55                 goto err_out3;
  56
  57         brioctl_set(br_ioctl_deviceless_stub);
  58         br_handle_frame_hook = br_handle_frame;
  59
  60         br_fdb_get_hook = br_fdb_get;
  61         br_fdb_put_hook = br_fdb_put;
  62
  63         return 0;
  64 err_out3:
  65         unregister_netdevice_notifier(&br_device_notifier);
  66 err_out2:
  67         br_netfilter_fini();
  68 err_out1:
  69         br_fdb_fini();
  70 err_out:
  71         stp_proto_unregister(&br_stp_proto);
  72         return err;
  73 }
  74
  75 static void __exit br_deinit(void)
  76 {
  77         stp_proto_unregister(&br_stp_proto);
  78
  79         br_netlink_fini();
  80         unregister_netdevice_notifier(&br_device_notifier);
  81         brioctl_set(NULL);
  82
  83         br_cleanup_bridges();
  84
  85         synchronize_net();
  86
  87         br_netfilter_fini();
  88         br_fdb_get_hook = NULL;
  89         br_fdb_put_hook = NULL;
  90
  91         br_handle_frame_hook = NULL;
  92         br_fdb_fini();
  93 }
  94
  95 EXPORT_SYMBOL(br_should_route_hook);
  96
  97 module_init(br_init)
  98 module_exit(br_deinit)
  99 MODULE_LICENSE("GPL");
 100 MODULE_VERSION(BR_VERSION);