xref: /linux/net/bridge/br.c (revision 5e8d780d745c1619aba81fe7166c5a4b5cad2b84)
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);
94