xref: /openbmc/linux/net/bridge/br.c (revision e868d61272caa648214046a096e5a6bfc068dc8c)
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 
26 int (*br_should_route_hook) (struct sk_buff **pskb) = NULL;
27 
28 static struct llc_sap *br_stp_sap;
29 
30 static 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_out1;
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;
63 err_out3:
64 	unregister_netdevice_notifier(&br_device_notifier);
65 err_out2:
66 	br_netfilter_fini();
67 err_out1:
68 	llc_sap_put(br_stp_sap);
69 	return err;
70 }
71 
72 static void __exit br_deinit(void)
73 {
74 	rcu_assign_pointer(br_stp_sap->rcv_func, NULL);
75 
76 	br_netlink_fini();
77 	br_netfilter_fini();
78 	unregister_netdevice_notifier(&br_device_notifier);
79 	brioctl_set(NULL);
80 
81 	br_cleanup_bridges();
82 
83 	synchronize_net();
84 
85 	llc_sap_put(br_stp_sap);
86 	br_fdb_get_hook = NULL;
87 	br_fdb_put_hook = NULL;
88 
89 	br_handle_frame_hook = NULL;
90 	br_fdb_fini();
91 }
92 
93 EXPORT_SYMBOL(br_should_route_hook);
94 
95 module_init(br_init)
96 module_exit(br_deinit)
97 MODULE_LICENSE("GPL");
98 MODULE_VERSION(BR_VERSION);
99