LXR linux/net/bridge/br.c

   1/*
   2 *      Generic parts
   3 *      Linux ethernet bridge
   4 *
   5 *      Authors:
   6 *      Lennert Buytenhek               <buytenh@gnu.org>
   7 *
   8 *      $Id: br.c,v 1.47 2001/12/24 00:56:41 davem Exp $
   9 *
  10 *      This program is free software; you can redistribute it and/or
  11 *      modify it under the terms of the GNU General Public License
  12 *      as published by the Free Software Foundation; either version
  13 *      2 of the License, or (at your option) any later version.
  14 */
  15
  16#include <linux/module.h>
  17#include <linux/kernel.h>
  18#include <linux/netdevice.h>
  19#include <linux/etherdevice.h>
  20#include <linux/init.h>
  21#include <linux/llc.h>
  22#include <net/llc.h>
  23
  24#include "br_private.h"
  25
  26int (*br_should_route_hook)(struct sk_buff *skb);
  27
  28static struct llc_sap *br_stp_sap;
  29
  30static int __init br_init(void)
  31{
  32        int err;
  33
  34        br_stp_sap = llc_sap_open(LLC_SAP_BSPAN, br_stp_rcv);
  35        if (!br_stp_sap) {
  36                printk(KERN_ERR "bridge: can't register sap for STP\n");
  37                return -EADDRINUSE;
  38        }
  39
  40        err = br_fdb_init();
  41        if (err)
  42                goto err_out;
  43
  44        err = br_netfilter_init();
  45        if (err)
  46                goto err_out1;
  47
  48        err = register_netdevice_notifier(&br_device_notifier);
  49        if (err)
  50                goto err_out2;
  51
  52        err = br_netlink_init();
  53        if (err)
  54                goto err_out3;
  55
  56        brioctl_set(br_ioctl_deviceless_stub);
  57        br_handle_frame_hook = br_handle_frame;
  58
  59        br_fdb_get_hook = br_fdb_get;
  60        br_fdb_put_hook = br_fdb_put;
  61
  62        return 0;
  63err_out3:
  64        unregister_netdevice_notifier(&br_device_notifier);
  65err_out2:
  66        br_netfilter_fini();
  67err_out1:
  68        br_fdb_fini();
  69err_out:
  70        llc_sap_put(br_stp_sap);
  71        return err;
  72}
  73
  74static void __exit br_deinit(void)
  75{
  76        rcu_assign_pointer(br_stp_sap->rcv_func, NULL);
  77
  78        br_netlink_fini();
  79        br_netfilter_fini();
  80        unregister_netdevice_notifier(&br_device_notifier);
  81        brioctl_set(NULL);
  82
  83        br_cleanup_bridges();
  84
  85        synchronize_net();
  86
  87        llc_sap_put(br_stp_sap);
  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
  95EXPORT_SYMBOL(br_should_route_hook);
  96
  97module_init(br_init)
  98module_exit(br_deinit)
  99MODULE_LICENSE("GPL");
 100MODULE_VERSION(BR_VERSION);
 101