[deliverable/linux.git] / net / bridge / br.c

/*
 *	Generic parts
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/llc.h>
#include <net/llc.h>
#include <net/stp.h>

#include "br_private.h"

static void __net_exit br_net_exit(struct net *net)
{
	struct net_device *dev;
	LIST_HEAD(list);

	rtnl_lock();
	for_each_netdev(net, dev)
		if (dev->priv_flags & IFF_EBRIDGE)
			br_dev_delete(dev, &list);

	unregister_netdevice_many(&list);
	rtnl_unlock();

}

static struct pernet_operations br_net_ops = {
	.exit	= br_net_exit,
};

static const struct stp_proto br_stp_proto = {
	.rcv	= br_stp_rcv,
};

static int __init br_init(void)
{
	int err;

	err = stp_proto_register(&br_stp_proto);
	if (err < 0) {
		pr_err("bridge: can't register sap for STP\n");
		return err;
	}

	err = br_fdb_init();
	if (err)
		goto err_out;

	err = register_pernet_subsys(&br_net_ops);
	if (err)
		goto err_out1;

	err = br_netfilter_init();
	if (err)
		goto err_out2;

	err = register_netdevice_notifier(&br_device_notifier);
	if (err)
		goto err_out3;

	err = br_netlink_init();
	if (err)
		goto err_out4;

	brioctl_set(br_ioctl_deviceless_stub);

#if IS_ENABLED(CONFIG_ATM_LANE)
	br_fdb_test_addr_hook = br_fdb_test_addr;
#endif

	return 0;
err_out4:
	unregister_netdevice_notifier(&br_device_notifier);
err_out3:
	br_netfilter_fini();
err_out2:
	unregister_pernet_subsys(&br_net_ops);
err_out1:
	br_fdb_fini();
err_out:
	stp_proto_unregister(&br_stp_proto);
	return err;
}

static void __exit br_deinit(void)
{
	stp_proto_unregister(&br_stp_proto);

	br_netlink_fini();
	unregister_netdevice_notifier(&br_device_notifier);
	brioctl_set(NULL);

	unregister_pernet_subsys(&br_net_ops);

	rcu_barrier(); /* Wait for completion of call_rcu()'s */

	br_netfilter_fini();
#if IS_ENABLED(CONFIG_ATM_LANE)
	br_fdb_test_addr_hook = NULL;
#endif

	br_fdb_fini();
}

module_init(br_init)
module_exit(br_deinit)
MODULE_LICENSE("GPL");
MODULE_VERSION(BR_VERSION);
MODULE_ALIAS_RTNL_LINK("bridge");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Generic parts
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <buytenh@gnu.org>
	7	*
1da177e4 LT	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
1da177e4 LT	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>
cf0f02d0 SH	19	#include <linux/llc.h>
cf0f02d0 SH	20	#include <net/llc.h>
7c85fbf0	21	#include <net/stp.h>
1da177e4 LT	22
	23	#include "br_private.h"
	24
b86f81cc WC	25	static void __net_exit br_net_exit(struct net *net)
	26	{
	27	struct net_device *dev;
	28	LIST_HEAD(list);
	29
	30	rtnl_lock();
	31	for_each_netdev(net, dev)
	32	if (dev->priv_flags & IFF_EBRIDGE)
	33	br_dev_delete(dev, &list);
	34
	35	unregister_netdevice_many(&list);
	36	rtnl_unlock();
	37
	38	}
cf0f02d0	39
712d6954 AD	40	static struct pernet_operations br_net_ops = {
	41	.exit = br_net_exit,
	42	};
	43
b86f81cc WC	44	static const struct stp_proto br_stp_proto = {
	45	.rcv = br_stp_rcv,
	46	};
	47
1da177e4 LT	48	static int __init br_init(void)
1da177e4 LT	49	{
c0909713 SH	50	int err;
c0909713 SH	51
7c85fbf0 PM	52	err = stp_proto_register(&br_stp_proto);
7c85fbf0 PM	53	if (err < 0) {
28a16c97	54	pr_err("bridge: can't register sap for STP\n");
7c85fbf0	55	return err;
cf0f02d0 SH	56	}
cf0f02d0 SH	57
87a596e0 AM	58	err = br_fdb_init();
87a596e0 AM	59	if (err)
17efdd45	60	goto err_out;
1da177e4	61
712d6954	62	err = register_pernet_subsys(&br_net_ops);
c0909713 SH	63	if (err)
	64	goto err_out1;
	65
712d6954	66	err = br_netfilter_init();
c0909713 SH	67	if (err)
	68	goto err_out2;
	69
712d6954	70	err = register_netdevice_notifier(&br_device_notifier);
32fe21c0 TG	71	if (err)
	72	goto err_out3;
	73
712d6954 AD	74	err = br_netlink_init();
	75	if (err)
	76	goto err_out4;
	77
1da177e4	78	brioctl_set(br_ioctl_deviceless_stub);
1da177e4	79
e6373c4c	80	#if IS_ENABLED(CONFIG_ATM_LANE)
da678292 MM	81	br_fdb_test_addr_hook = br_fdb_test_addr;
da678292 MM	82	#endif
1da177e4	83
1da177e4	84	return 0;
712d6954	85	err_out4:
32fe21c0	86	unregister_netdevice_notifier(&br_device_notifier);
712d6954	87	err_out3:
c0909713	88	br_netfilter_fini();
712d6954 AD	89	err_out2:
712d6954 AD	90	unregister_pernet_subsys(&br_net_ops);
c0909713	91	err_out1:
17efdd45 PE	92	br_fdb_fini();
17efdd45 PE	93	err_out:
7c85fbf0	94	stp_proto_unregister(&br_stp_proto);
c0909713	95	return err;
1da177e4 LT	96	}
	97
	98	static void __exit br_deinit(void)
	99	{
7c85fbf0	100	stp_proto_unregister(&br_stp_proto);
cf0f02d0	101
11dc1f36	102	br_netlink_fini();
1da177e4 LT	103	unregister_netdevice_notifier(&br_device_notifier);
	104	brioctl_set(NULL);
	105
712d6954	106	unregister_pernet_subsys(&br_net_ops);
1da177e4	107
473c22d7	108	rcu_barrier(); /* Wait for completion of call_rcu()'s */
1da177e4	109
d69efb16	110	br_netfilter_fini();
e6373c4c	111	#if IS_ENABLED(CONFIG_ATM_LANE)
da678292 MM	112	br_fdb_test_addr_hook = NULL;
da678292 MM	113	#endif
1da177e4	114
1da177e4 LT	115	br_fdb_fini();
	116	}
	117
1da177e4 LT	118	module_init(br_init)
	119	module_exit(br_deinit)
	120	MODULE_LICENSE("GPL");
8cbb512e	121	MODULE_VERSION(BR_VERSION);
bb900b27	122	MODULE_ALIAS_RTNL_LINK("bridge");