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 static const struct stp_proto br_stp_proto = {
26 	.rcv	= br_stp_rcv,
27 };
28 
29 static struct pernet_operations br_net_ops = {
30 	.exit	= br_net_exit,
31 };
32 
br_init(void)33 static int __init br_init(void)
34 {
35 	int err;
36 
37 	err = stp_proto_register(&br_stp_proto);
38 	if (err < 0) {
39 		pr_err("bridge: can't register sap for STP\n");
40 		return err;
41 	}
42 
43 	err = br_fdb_init();
44 	if (err)
45 		goto err_out;
46 
47 	err = register_pernet_subsys(&br_net_ops);
48 	if (err)
49 		goto err_out1;
50 
51 	err = br_netfilter_init();
52 	if (err)
53 		goto err_out2;
54 
55 	err = register_netdevice_notifier(&br_device_notifier);
56 	if (err)
57 		goto err_out3;
58 
59 	err = br_netlink_init();
60 	if (err)
61 		goto err_out4;
62 
63 	brioctl_set(br_ioctl_deviceless_stub);
64 
65 #if IS_ENABLED(CONFIG_ATM_LANE)
66 	br_fdb_test_addr_hook = br_fdb_test_addr;
67 #endif
68 
69 	return 0;
70 err_out4:
71 	unregister_netdevice_notifier(&br_device_notifier);
72 err_out3:
73 	br_netfilter_fini();
74 err_out2:
75 	unregister_pernet_subsys(&br_net_ops);
76 err_out1:
77 	br_fdb_fini();
78 err_out:
79 	stp_proto_unregister(&br_stp_proto);
80 	return err;
81 }
82 
br_deinit(void)83 static void __exit br_deinit(void)
84 {
85 	stp_proto_unregister(&br_stp_proto);
86 
87 	br_netlink_fini();
88 	unregister_netdevice_notifier(&br_device_notifier);
89 	brioctl_set(NULL);
90 
91 	unregister_pernet_subsys(&br_net_ops);
92 
93 	rcu_barrier(); /* Wait for completion of call_rcu()'s */
94 
95 	br_netfilter_fini();
96 #if IS_ENABLED(CONFIG_ATM_LANE)
97 	br_fdb_test_addr_hook = NULL;
98 #endif
99 
100 	br_fdb_fini();
101 }
102 
103 module_init(br_init)
104 module_exit(br_deinit)
105 MODULE_LICENSE("GPL");
106 MODULE_VERSION(BR_VERSION);
107 MODULE_ALIAS_RTNL_LINK("bridge");
108