Merge branch 'rio.b19' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/bird
[linux-2.6] / 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/config.h>
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/init.h>
22 #include <linux/llc.h>
23 #include <net/llc.h>
24
25 #include "br_private.h"
26
27 int (*br_should_route_hook) (struct sk_buff **pskb) = NULL;
28
29 static struct llc_sap *br_stp_sap;
30
31 static int __init br_init(void)
32 {
33         int err;
34
35         br_stp_sap = llc_sap_open(LLC_SAP_BSPAN, br_stp_rcv);
36         if (!br_stp_sap) {
37                 printk(KERN_ERR "bridge: can't register sap for STP\n");
38                 return -EADDRINUSE;
39         }
40
41         br_fdb_init();
42
43         err = br_netfilter_init();
44         if (err)
45                 goto err_out1;
46
47         err = register_netdevice_notifier(&br_device_notifier);
48         if (err)
49                 goto err_out2;
50
51         br_netlink_init();
52         brioctl_set(br_ioctl_deviceless_stub);
53         br_handle_frame_hook = br_handle_frame;
54
55         br_fdb_get_hook = br_fdb_get;
56         br_fdb_put_hook = br_fdb_put;
57
58         return 0;
59
60 err_out2:
61         br_netfilter_fini();
62 err_out1:
63         llc_sap_put(br_stp_sap);
64         return err;
65 }
66
67 static void __exit br_deinit(void)
68 {
69         rcu_assign_pointer(br_stp_sap->rcv_func, NULL);
70
71         br_netlink_fini();
72         br_netfilter_fini();
73         unregister_netdevice_notifier(&br_device_notifier);
74         brioctl_set(NULL);
75
76         br_cleanup_bridges();
77
78         synchronize_net();
79
80         llc_sap_put(br_stp_sap);
81         br_fdb_get_hook = NULL;
82         br_fdb_put_hook = NULL;
83
84         br_handle_frame_hook = NULL;
85         br_fdb_fini();
86 }
87
88 EXPORT_SYMBOL(br_should_route_hook);
89
90 module_init(br_init)
91 module_exit(br_deinit)
92 MODULE_LICENSE("GPL");
93 MODULE_VERSION(BR_VERSION);