[linux-2.6-block.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 <net/switchdev.h>

#include "br_private.h"

/*
 * Handle changes in state of network devices enslaved to a bridge.
 *
 * Note: don't care about up/down if bridge itself is down, because
 *     port state is checked when bridge is brought up.
 */
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
	struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
	struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct net_bridge_port *p;
	struct net_bridge *br;
	bool notified = false;
	bool changed_addr;
	int err;

	/* register of bridge completed, add sysfs entries */
	if ((dev->priv_flags & IFF_EBRIDGE) && event == NETDEV_REGISTER) {
		br_sysfs_addbr(dev);
		return NOTIFY_DONE;
	}

	/* not a port of a bridge */
	p = br_port_get_rtnl(dev);
	if (!p)
		return NOTIFY_DONE;

	br = p->br;

	switch (event) {
	case NETDEV_CHANGEMTU:
		br_mtu_auto_adjust(br);
		break;

	case NETDEV_PRE_CHANGEADDR:
		if (br->dev->addr_assign_type == NET_ADDR_SET)
			break;
		prechaddr_info = ptr;
		err = dev_pre_changeaddr_notify(br->dev,
						prechaddr_info->dev_addr,
						extack);
		if (err)
			return notifier_from_errno(err);
		break;

	case NETDEV_CHANGEADDR:
		spin_lock_bh(&br->lock);
		br_fdb_changeaddr(p, dev->dev_addr);
		changed_addr = br_stp_recalculate_bridge_id(br);
		spin_unlock_bh(&br->lock);

		if (changed_addr)
			call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);

		break;

	case NETDEV_CHANGE:
		br_port_carrier_check(p, &notified);
		break;

	case NETDEV_FEAT_CHANGE:
		netdev_update_features(br->dev);
		break;

	case NETDEV_DOWN:
		spin_lock_bh(&br->lock);
		if (br->dev->flags & IFF_UP) {
			br_stp_disable_port(p);
			notified = true;
		}
		spin_unlock_bh(&br->lock);
		break;

	case NETDEV_UP:
		if (netif_running(br->dev) && netif_oper_up(dev)) {
			spin_lock_bh(&br->lock);
			br_stp_enable_port(p);
			notified = true;
			spin_unlock_bh(&br->lock);
		}
		break;

	case NETDEV_UNREGISTER:
		br_del_if(br, dev);
		break;

	case NETDEV_CHANGENAME:
		err = br_sysfs_renameif(p);
		if (err)
			return notifier_from_errno(err);
		break;

	case NETDEV_PRE_TYPE_CHANGE:
		/* Forbid underlaying device to change its type. */
		return NOTIFY_BAD;

	case NETDEV_RESEND_IGMP:
		/* Propagate to master device */
		call_netdevice_notifiers(event, br->dev);
		break;
	}

	/* Events that may cause spanning tree to refresh */
	if (!notified && (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
			  event == NETDEV_CHANGE || event == NETDEV_DOWN))
		br_ifinfo_notify(RTM_NEWLINK, NULL, p);

	return NOTIFY_DONE;
}

static struct notifier_block br_device_notifier = {
	.notifier_call = br_device_event
};

/* called with RTNL or RCU */
static int br_switchdev_event(struct notifier_block *unused,
			      unsigned long event, void *ptr)
{
	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
	struct net_bridge_port *p;
	struct net_bridge *br;
	struct switchdev_notifier_fdb_info *fdb_info;
	int err = NOTIFY_DONE;

	p = br_port_get_rtnl_rcu(dev);
	if (!p)
		goto out;

	br = p->br;

	switch (event) {
	case SWITCHDEV_FDB_ADD_TO_BRIDGE:
		fdb_info = ptr;
		err = br_fdb_external_learn_add(br, p, fdb_info->addr,
						fdb_info->vid, false);
		if (err) {
			err = notifier_from_errno(err);
			break;
		}
		br_fdb_offloaded_set(br, p, fdb_info->addr,
				     fdb_info->vid, true);
		break;
	case SWITCHDEV_FDB_DEL_TO_BRIDGE:
		fdb_info = ptr;
		err = br_fdb_external_learn_del(br, p, fdb_info->addr,
						fdb_info->vid, false);
		if (err)
			err = notifier_from_errno(err);
		break;
	case SWITCHDEV_FDB_OFFLOADED:
		fdb_info = ptr;
		br_fdb_offloaded_set(br, p, fdb_info->addr,
				     fdb_info->vid, fdb_info->offloaded);
		break;
	}

out:
	return err;
}

static struct notifier_block br_switchdev_notifier = {
	.notifier_call = br_switchdev_event,
};

/* br_boolopt_toggle - change user-controlled boolean option
 *
 * @br: bridge device
 * @opt: id of the option to change
 * @on: new option value
 * @extack: extack for error messages
 *
 * Changes the value of the respective boolean option to @on taking care of
 * any internal option value mapping and configuration.
 */
int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
		      struct netlink_ext_ack *extack)
{
	switch (opt) {
	case BR_BOOLOPT_NO_LL_LEARN:
		br_opt_toggle(br, BROPT_NO_LL_LEARN, on);
		break;
	default:
		/* shouldn't be called with unsupported options */
		WARN_ON(1);
		break;
	}

	return 0;
}

int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
{
	switch (opt) {
	case BR_BOOLOPT_NO_LL_LEARN:
		return br_opt_get(br, BROPT_NO_LL_LEARN);
	default:
		/* shouldn't be called with unsupported options */
		WARN_ON(1);
		break;
	}

	return 0;
}

int br_boolopt_multi_toggle(struct net_bridge *br,
			    struct br_boolopt_multi *bm,
			    struct netlink_ext_ack *extack)
{
	unsigned long bitmap = bm->optmask;
	int err = 0;
	int opt_id;

	for_each_set_bit(opt_id, &bitmap, BR_BOOLOPT_MAX) {
		bool on = !!(bm->optval & BIT(opt_id));

		err = br_boolopt_toggle(br, opt_id, on, extack);
		if (err) {
			br_debug(br, "boolopt multi-toggle error: option: %d current: %d new: %d error: %d\n",
				 opt_id, br_boolopt_get(br, opt_id), on, err);
			break;
		}
	}

	return err;
}

void br_boolopt_multi_get(const struct net_bridge *br,
			  struct br_boolopt_multi *bm)
{
	u32 optval = 0;
	int opt_id;

	for (opt_id = 0; opt_id < BR_BOOLOPT_MAX; opt_id++)
		optval |= (br_boolopt_get(br, opt_id) << opt_id);

	bm->optval = optval;
	bm->optmask = GENMASK((BR_BOOLOPT_MAX - 1), 0);
}

/* private bridge options, controlled by the kernel */
void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
{
	bool cur = !!br_opt_get(br, opt);

	br_debug(br, "toggle option: %d state: %d -> %d\n",
		 opt, cur, on);

	if (cur == on)
		return;

	if (on)
		set_bit(opt, &br->options);
	else
		clear_bit(opt, &br->options);
}

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;

	BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));

	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_nf_core_init();
	if (err)
		goto err_out2;

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

	err = register_switchdev_notifier(&br_switchdev_notifier);
	if (err)
		goto err_out4;

	err = br_netlink_init();
	if (err)
		goto err_out5;

	brioctl_set(br_ioctl_deviceless_stub);

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

#if IS_MODULE(CONFIG_BRIDGE_NETFILTER)
	pr_info("bridge: filtering via arp/ip/ip6tables is no longer available "
		"by default. Update your scripts to load br_netfilter if you "
		"need this.\n");
#endif

	return 0;

err_out5:
	unregister_switchdev_notifier(&br_switchdev_notifier);
err_out4:
	unregister_netdevice_notifier(&br_device_notifier);
err_out3:
	br_nf_core_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_switchdev_notifier(&br_switchdev_notifier);
	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_nf_core_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>
3aeb6617	22	#include <net/switchdev.h>
1da177e4 LT	23
	24	#include "br_private.h"
	25
b1282726 CW	26	/*
	27	* Handle changes in state of network devices enslaved to a bridge.
	28	*
	29	* Note: don't care about up/down if bridge itself is down, because
	30	* port state is checked when bridge is brought up.
	31	*/
	32	static int br_device_event(struct notifier_block unused, unsigned long event, void ptr)
	33	{
b89df65c PM	34	struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
b89df65c PM	35	struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
b1282726 CW	36	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	37	struct net_bridge_port *p;
	38	struct net_bridge *br;
faa1cd82	39	bool notified = false;
b1282726 CW	40	bool changed_addr;
	41	int err;
	42
	43	/* register of bridge completed, add sysfs entries */
	44	if ((dev->priv_flags & IFF_EBRIDGE) && event == NETDEV_REGISTER) {
	45	br_sysfs_addbr(dev);
	46	return NOTIFY_DONE;
	47	}
	48
	49	/* not a port of a bridge */
	50	p = br_port_get_rtnl(dev);
	51	if (!p)
	52	return NOTIFY_DONE;
	53
	54	br = p->br;
	55
	56	switch (event) {
	57	case NETDEV_CHANGEMTU:
804b854d	58	br_mtu_auto_adjust(br);
b1282726 CW	59	break;
b1282726 CW	60
b89df65c PM	61	case NETDEV_PRE_CHANGEADDR:
	62	if (br->dev->addr_assign_type == NET_ADDR_SET)
	63	break;
	64	prechaddr_info = ptr;
	65	err = dev_pre_changeaddr_notify(br->dev,
	66	prechaddr_info->dev_addr,
	67	extack);
	68	if (err)
	69	return notifier_from_errno(err);
	70	break;
	71
b1282726 CW	72	case NETDEV_CHANGEADDR:
	73	spin_lock_bh(&br->lock);
	74	br_fdb_changeaddr(p, dev->dev_addr);
	75	changed_addr = br_stp_recalculate_bridge_id(br);
	76	spin_unlock_bh(&br->lock);
	77
	78	if (changed_addr)
	79	call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
	80
	81	break;
	82
	83	case NETDEV_CHANGE:
faa1cd82	84	br_port_carrier_check(p, &notified);
b1282726 CW	85	break;
	86
	87	case NETDEV_FEAT_CHANGE:
	88	netdev_update_features(br->dev);
	89	break;
	90
	91	case NETDEV_DOWN:
	92	spin_lock_bh(&br->lock);
faa1cd82	93	if (br->dev->flags & IFF_UP) {
b1282726	94	br_stp_disable_port(p);
faa1cd82 NA	95	notified = true;
faa1cd82 NA	96	}
b1282726 CW	97	spin_unlock_bh(&br->lock);
	98	break;
	99
	100	case NETDEV_UP:
	101	if (netif_running(br->dev) && netif_oper_up(dev)) {
	102	spin_lock_bh(&br->lock);
	103	br_stp_enable_port(p);
faa1cd82	104	notified = true;
b1282726 CW	105	spin_unlock_bh(&br->lock);
	106	}
	107	break;
	108
	109	case NETDEV_UNREGISTER:
	110	br_del_if(br, dev);
	111	break;
	112
	113	case NETDEV_CHANGENAME:
	114	err = br_sysfs_renameif(p);
	115	if (err)
	116	return notifier_from_errno(err);
	117	break;
	118
	119	case NETDEV_PRE_TYPE_CHANGE:
	120	/* Forbid underlaying device to change its type. */
	121	return NOTIFY_BAD;
	122
	123	case NETDEV_RESEND_IGMP:
	124	/* Propagate to master device */
	125	call_netdevice_notifiers(event, br->dev);
	126	break;
	127	}
	128
	129	/* Events that may cause spanning tree to refresh */
faa1cd82 NA	130	if (!notified && (event == NETDEV_CHANGEADDR \|\| event == NETDEV_UP \|\|
faa1cd82 NA	131	event == NETDEV_CHANGE \|\| event == NETDEV_DOWN))
92899063	132	br_ifinfo_notify(RTM_NEWLINK, NULL, p);
b1282726 CW	133
	134	return NOTIFY_DONE;
	135	}
	136
	137	static struct notifier_block br_device_notifier = {
	138	.notifier_call = br_device_event
	139	};
	140
0baa10ff	141	/* called with RTNL or RCU */
ebb9a03a JP	142	static int br_switchdev_event(struct notifier_block *unused,
ebb9a03a JP	143	unsigned long event, void *ptr)
3aeb6617	144	{
ebb9a03a	145	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3aeb6617 JP	146	struct net_bridge_port *p;
3aeb6617 JP	147	struct net_bridge *br;
ebb9a03a	148	struct switchdev_notifier_fdb_info *fdb_info;
3aeb6617 JP	149	int err = NOTIFY_DONE;
3aeb6617 JP	150
0baa10ff	151	p = br_port_get_rtnl_rcu(dev);
3aeb6617 JP	152	if (!p)
	153	goto out;
	154
	155	br = p->br;
	156
	157	switch (event) {
6b26b51b	158	case SWITCHDEV_FDB_ADD_TO_BRIDGE:
3aeb6617 JP	159	fdb_info = ptr;
3aeb6617 JP	160	err = br_fdb_external_learn_add(br, p, fdb_info->addr,
161d82de	161	fdb_info->vid, false);
9fe8bcec	162	if (err) {
3aeb6617	163	err = notifier_from_errno(err);
9fe8bcec AS	164	break;
	165	}
	166	br_fdb_offloaded_set(br, p, fdb_info->addr,
e9ba0fbc	167	fdb_info->vid, true);
3aeb6617	168	break;
6b26b51b	169	case SWITCHDEV_FDB_DEL_TO_BRIDGE:
3aeb6617 JP	170	fdb_info = ptr;
3aeb6617 JP	171	err = br_fdb_external_learn_del(br, p, fdb_info->addr,
161d82de	172	fdb_info->vid, false);
3aeb6617 JP	173	if (err)
	174	err = notifier_from_errno(err);
	175	break;
9fe8bcec AS	176	case SWITCHDEV_FDB_OFFLOADED:
	177	fdb_info = ptr;
	178	br_fdb_offloaded_set(br, p, fdb_info->addr,
e9ba0fbc	179	fdb_info->vid, fdb_info->offloaded);
9fe8bcec	180	break;
3aeb6617 JP	181	}
	182
	183	out:
3aeb6617 JP	184	return err;
	185	}
	186
ebb9a03a JP	187	static struct notifier_block br_switchdev_notifier = {
ebb9a03a JP	188	.notifier_call = br_switchdev_event,
3aeb6617 JP	189	};
3aeb6617 JP	190
a428afe8 NA	191	/* br_boolopt_toggle - change user-controlled boolean option
	192	*
	193	* @br: bridge device
	194	* @opt: id of the option to change
	195	* @on: new option value
	196	* @extack: extack for error messages
	197	*
	198	* Changes the value of the respective boolean option to @on taking care of
	199	* any internal option value mapping and configuration.
	200	*/
	201	int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
	202	struct netlink_ext_ack *extack)
	203	{
	204	switch (opt) {
70e4272b NA	205	case BR_BOOLOPT_NO_LL_LEARN:
	206	br_opt_toggle(br, BROPT_NO_LL_LEARN, on);
	207	break;
a428afe8 NA	208	default:
	209	/* shouldn't be called with unsupported options */
	210	WARN_ON(1);
	211	break;
	212	}
	213
	214	return 0;
	215	}
	216
	217	int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
	218	{
	219	switch (opt) {
70e4272b NA	220	case BR_BOOLOPT_NO_LL_LEARN:
70e4272b NA	221	return br_opt_get(br, BROPT_NO_LL_LEARN);
a428afe8 NA	222	default:
	223	/* shouldn't be called with unsupported options */
	224	WARN_ON(1);
	225	break;
	226	}
	227
	228	return 0;
	229	}
	230
	231	int br_boolopt_multi_toggle(struct net_bridge *br,
	232	struct br_boolopt_multi *bm,
	233	struct netlink_ext_ack *extack)
	234	{
	235	unsigned long bitmap = bm->optmask;
	236	int err = 0;
	237	int opt_id;
	238
	239	for_each_set_bit(opt_id, &bitmap, BR_BOOLOPT_MAX) {
	240	bool on = !!(bm->optval & BIT(opt_id));
	241
	242	err = br_boolopt_toggle(br, opt_id, on, extack);
	243	if (err) {
	244	br_debug(br, "boolopt multi-toggle error: option: %d current: %d new: %d error: %d\n",
	245	opt_id, br_boolopt_get(br, opt_id), on, err);
	246	break;
	247	}
	248	}
	249
	250	return err;
	251	}
	252
	253	void br_boolopt_multi_get(const struct net_bridge *br,
	254	struct br_boolopt_multi *bm)
	255	{
	256	u32 optval = 0;
	257	int opt_id;
	258
	259	for (opt_id = 0; opt_id < BR_BOOLOPT_MAX; opt_id++)
	260	optval \|= (br_boolopt_get(br, opt_id) << opt_id);
	261
	262	bm->optval = optval;
1ed1ccb9	263	bm->optmask = GENMASK((BR_BOOLOPT_MAX - 1), 0);
a428afe8 NA	264	}
	265
	266	/* private bridge options, controlled by the kernel */
ae75767e NA	267	void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
	268	{
	269	bool cur = !!br_opt_get(br, opt);
	270
	271	br_debug(br, "toggle option: %d state: %d -> %d\n",
	272	opt, cur, on);
	273
	274	if (cur == on)
	275	return;
	276
	277	if (on)
	278	set_bit(opt, &br->options);
	279	else
	280	clear_bit(opt, &br->options);
	281	}
	282
b86f81cc WC	283	static void __net_exit br_net_exit(struct net *net)
	284	{
	285	struct net_device *dev;
	286	LIST_HEAD(list);
	287
	288	rtnl_lock();
	289	for_each_netdev(net, dev)
	290	if (dev->priv_flags & IFF_EBRIDGE)
	291	br_dev_delete(dev, &list);
	292
	293	unregister_netdevice_many(&list);
	294	rtnl_unlock();
	295
	296	}
cf0f02d0	297
712d6954 AD	298	static struct pernet_operations br_net_ops = {
	299	.exit = br_net_exit,
	300	};
	301
b86f81cc WC	302	static const struct stp_proto br_stp_proto = {
	303	.rcv = br_stp_rcv,
	304	};
	305
1da177e4 LT	306	static int __init br_init(void)
1da177e4 LT	307	{
c0909713 SH	308	int err;
c0909713 SH	309
71e168b1 FW	310	BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
71e168b1 FW	311
7c85fbf0 PM	312	err = stp_proto_register(&br_stp_proto);
7c85fbf0 PM	313	if (err < 0) {
28a16c97	314	pr_err("bridge: can't register sap for STP\n");
7c85fbf0	315	return err;
cf0f02d0 SH	316	}
cf0f02d0 SH	317
87a596e0 AM	318	err = br_fdb_init();
87a596e0 AM	319	if (err)
17efdd45	320	goto err_out;
1da177e4	321
712d6954	322	err = register_pernet_subsys(&br_net_ops);
c0909713 SH	323	if (err)
	324	goto err_out1;
	325
34666d46	326	err = br_nf_core_init();
c0909713 SH	327	if (err)
	328	goto err_out2;
	329
712d6954	330	err = register_netdevice_notifier(&br_device_notifier);
32fe21c0 TG	331	if (err)
	332	goto err_out3;
	333
ebb9a03a	334	err = register_switchdev_notifier(&br_switchdev_notifier);
712d6954 AD	335	if (err)
	336	goto err_out4;
	337
3aeb6617 JP	338	err = br_netlink_init();
	339	if (err)
	340	goto err_out5;
	341
1da177e4	342	brioctl_set(br_ioctl_deviceless_stub);
1da177e4	343
e6373c4c	344	#if IS_ENABLED(CONFIG_ATM_LANE)
da678292 MM	345	br_fdb_test_addr_hook = br_fdb_test_addr;
da678292 MM	346	#endif
1da177e4	347
d4ef9f72 SA	348	#if IS_MODULE(CONFIG_BRIDGE_NETFILTER)
	349	pr_info("bridge: filtering via arp/ip/ip6tables is no longer available "
	350	"by default. Update your scripts to load br_netfilter if you "
34666d46	351	"need this.\n");
d4ef9f72	352	#endif
34666d46	353
1da177e4	354	return 0;
34666d46	355
3aeb6617	356	err_out5:
ebb9a03a	357	unregister_switchdev_notifier(&br_switchdev_notifier);
712d6954	358	err_out4:
32fe21c0	359	unregister_netdevice_notifier(&br_device_notifier);
712d6954	360	err_out3:
34666d46	361	br_nf_core_fini();
712d6954 AD	362	err_out2:
712d6954 AD	363	unregister_pernet_subsys(&br_net_ops);
c0909713	364	err_out1:
17efdd45 PE	365	br_fdb_fini();
17efdd45 PE	366	err_out:
7c85fbf0	367	stp_proto_unregister(&br_stp_proto);
c0909713	368	return err;
1da177e4 LT	369	}
	370
	371	static void __exit br_deinit(void)
	372	{
7c85fbf0	373	stp_proto_unregister(&br_stp_proto);
11dc1f36	374	br_netlink_fini();
ebb9a03a	375	unregister_switchdev_notifier(&br_switchdev_notifier);
1da177e4 LT	376	unregister_netdevice_notifier(&br_device_notifier);
1da177e4 LT	377	brioctl_set(NULL);
712d6954	378	unregister_pernet_subsys(&br_net_ops);
1da177e4	379
473c22d7	380	rcu_barrier(); /* Wait for completion of call_rcu()'s */
1da177e4	381
34666d46	382	br_nf_core_fini();
e6373c4c	383	#if IS_ENABLED(CONFIG_ATM_LANE)
da678292 MM	384	br_fdb_test_addr_hook = NULL;
da678292 MM	385	#endif
1da177e4 LT	386	br_fdb_fini();
	387	}
	388
1da177e4 LT	389	module_init(br_init)
	390	module_exit(br_deinit)
	391	MODULE_LICENSE("GPL");
8cbb512e	392	MODULE_VERSION(BR_VERSION);
bb900b27	393	MODULE_ALIAS_RTNL_LINK("bridge");