[linux-2.6-block.git] / net / bridge / br.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *	Generic parts
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 */

#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;

	if (dev->priv_flags & IFF_EBRIDGE) {
		err = br_vlan_bridge_event(dev, event, ptr);
		if (err)
			return notifier_from_errno(err);

		if (event == NETDEV_REGISTER) {
			/* register of bridge completed, add sysfs entries */
			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;
	}

	if (event != NETDEV_UNREGISTER)
		br_vlan_port_event(p, event);

	/* 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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* Generic parts
	4	* Linux ethernet bridge
	5	*
	6	* Authors:
	7	* Lennert Buytenhek <buytenh@gnu.org>
1da177e4 LT	8	*/
1da177e4 LT	9
1da177e4 LT	10	#include <linux/module.h>
	11	#include <linux/kernel.h>
	12	#include <linux/netdevice.h>
	13	#include <linux/etherdevice.h>
	14	#include <linux/init.h>
cf0f02d0 SH	15	#include <linux/llc.h>
cf0f02d0 SH	16	#include <net/llc.h>
7c85fbf0	17	#include <net/stp.h>
3aeb6617	18	#include <net/switchdev.h>
1da177e4 LT	19
	20	#include "br_private.h"
	21
b1282726 CW	22	/*
	23	* Handle changes in state of network devices enslaved to a bridge.
	24	*
	25	* Note: don't care about up/down if bridge itself is down, because
	26	* port state is checked when bridge is brought up.
	27	*/
	28	static int br_device_event(struct notifier_block unused, unsigned long event, void ptr)
	29	{
b89df65c PM	30	struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
b89df65c PM	31	struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
b1282726 CW	32	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	33	struct net_bridge_port *p;
	34	struct net_bridge *br;
faa1cd82	35	bool notified = false;
b1282726 CW	36	bool changed_addr;
	37	int err;
	38
9c0ec2e7	39	if (dev->priv_flags & IFF_EBRIDGE) {
091adf9b NA	40	err = br_vlan_bridge_event(dev, event, ptr);
	41	if (err)
	42	return notifier_from_errno(err);
	43
9c0ec2e7 MM	44	if (event == NETDEV_REGISTER) {
	45	/* register of bridge completed, add sysfs entries */
	46	br_sysfs_addbr(dev);
	47	return NOTIFY_DONE;
	48	}
b1282726 CW	49	}
	50
	51	/* not a port of a bridge */
	52	p = br_port_get_rtnl(dev);
	53	if (!p)
	54	return NOTIFY_DONE;
	55
	56	br = p->br;
	57
	58	switch (event) {
	59	case NETDEV_CHANGEMTU:
804b854d	60	br_mtu_auto_adjust(br);
b1282726 CW	61	break;
b1282726 CW	62
b89df65c PM	63	case NETDEV_PRE_CHANGEADDR:
	64	if (br->dev->addr_assign_type == NET_ADDR_SET)
	65	break;
	66	prechaddr_info = ptr;
	67	err = dev_pre_changeaddr_notify(br->dev,
	68	prechaddr_info->dev_addr,
	69	extack);
	70	if (err)
	71	return notifier_from_errno(err);
	72	break;
	73
b1282726 CW	74	case NETDEV_CHANGEADDR:
	75	spin_lock_bh(&br->lock);
	76	br_fdb_changeaddr(p, dev->dev_addr);
	77	changed_addr = br_stp_recalculate_bridge_id(br);
	78	spin_unlock_bh(&br->lock);
	79
	80	if (changed_addr)
	81	call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
	82
	83	break;
	84
	85	case NETDEV_CHANGE:
faa1cd82	86	br_port_carrier_check(p, &notified);
b1282726 CW	87	break;
	88
	89	case NETDEV_FEAT_CHANGE:
	90	netdev_update_features(br->dev);
	91	break;
	92
	93	case NETDEV_DOWN:
	94	spin_lock_bh(&br->lock);
faa1cd82	95	if (br->dev->flags & IFF_UP) {
b1282726	96	br_stp_disable_port(p);
faa1cd82 NA	97	notified = true;
faa1cd82 NA	98	}
b1282726 CW	99	spin_unlock_bh(&br->lock);
	100	break;
	101
	102	case NETDEV_UP:
	103	if (netif_running(br->dev) && netif_oper_up(dev)) {
	104	spin_lock_bh(&br->lock);
	105	br_stp_enable_port(p);
faa1cd82	106	notified = true;
b1282726 CW	107	spin_unlock_bh(&br->lock);
	108	}
	109	break;
	110
	111	case NETDEV_UNREGISTER:
	112	br_del_if(br, dev);
	113	break;
	114
	115	case NETDEV_CHANGENAME:
	116	err = br_sysfs_renameif(p);
	117	if (err)
	118	return notifier_from_errno(err);
	119	break;
	120
	121	case NETDEV_PRE_TYPE_CHANGE:
	122	/* Forbid underlaying device to change its type. */
	123	return NOTIFY_BAD;
	124
	125	case NETDEV_RESEND_IGMP:
	126	/* Propagate to master device */
	127	call_netdevice_notifiers(event, br->dev);
	128	break;
	129	}
	130
697cd36c IS	131	if (event != NETDEV_UNREGISTER)
697cd36c IS	132	br_vlan_port_event(p, event);
9c0ec2e7	133
b1282726	134	/* Events that may cause spanning tree to refresh */
faa1cd82 NA	135	if (!notified && (event == NETDEV_CHANGEADDR \|\| event == NETDEV_UP \|\|
faa1cd82 NA	136	event == NETDEV_CHANGE \|\| event == NETDEV_DOWN))
92899063	137	br_ifinfo_notify(RTM_NEWLINK, NULL, p);
b1282726 CW	138
	139	return NOTIFY_DONE;
	140	}
	141
	142	static struct notifier_block br_device_notifier = {
	143	.notifier_call = br_device_event
	144	};
	145
0baa10ff	146	/* called with RTNL or RCU */
ebb9a03a JP	147	static int br_switchdev_event(struct notifier_block *unused,
ebb9a03a JP	148	unsigned long event, void *ptr)
3aeb6617	149	{
ebb9a03a	150	struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3aeb6617 JP	151	struct net_bridge_port *p;
3aeb6617 JP	152	struct net_bridge *br;
ebb9a03a	153	struct switchdev_notifier_fdb_info *fdb_info;
3aeb6617 JP	154	int err = NOTIFY_DONE;
3aeb6617 JP	155
0baa10ff	156	p = br_port_get_rtnl_rcu(dev);
3aeb6617 JP	157	if (!p)
	158	goto out;
	159
	160	br = p->br;
	161
	162	switch (event) {
6b26b51b	163	case SWITCHDEV_FDB_ADD_TO_BRIDGE:
3aeb6617 JP	164	fdb_info = ptr;
3aeb6617 JP	165	err = br_fdb_external_learn_add(br, p, fdb_info->addr,
161d82de	166	fdb_info->vid, false);
9fe8bcec	167	if (err) {
3aeb6617	168	err = notifier_from_errno(err);
9fe8bcec AS	169	break;
	170	}
	171	br_fdb_offloaded_set(br, p, fdb_info->addr,
e9ba0fbc	172	fdb_info->vid, true);
3aeb6617	173	break;
6b26b51b	174	case SWITCHDEV_FDB_DEL_TO_BRIDGE:
3aeb6617 JP	175	fdb_info = ptr;
3aeb6617 JP	176	err = br_fdb_external_learn_del(br, p, fdb_info->addr,
161d82de	177	fdb_info->vid, false);
3aeb6617 JP	178	if (err)
	179	err = notifier_from_errno(err);
	180	break;
9fe8bcec AS	181	case SWITCHDEV_FDB_OFFLOADED:
	182	fdb_info = ptr;
	183	br_fdb_offloaded_set(br, p, fdb_info->addr,
e9ba0fbc	184	fdb_info->vid, fdb_info->offloaded);
9fe8bcec	185	break;
3aeb6617 JP	186	}
	187
	188	out:
3aeb6617 JP	189	return err;
	190	}
	191
ebb9a03a JP	192	static struct notifier_block br_switchdev_notifier = {
ebb9a03a JP	193	.notifier_call = br_switchdev_event,
3aeb6617 JP	194	};
3aeb6617 JP	195
a428afe8 NA	196	/* br_boolopt_toggle - change user-controlled boolean option
	197	*
	198	* @br: bridge device
	199	* @opt: id of the option to change
	200	* @on: new option value
	201	* @extack: extack for error messages
	202	*
	203	* Changes the value of the respective boolean option to @on taking care of
	204	* any internal option value mapping and configuration.
	205	*/
	206	int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
	207	struct netlink_ext_ack *extack)
	208	{
	209	switch (opt) {
70e4272b NA	210	case BR_BOOLOPT_NO_LL_LEARN:
	211	br_opt_toggle(br, BROPT_NO_LL_LEARN, on);
	212	break;
a428afe8 NA	213	default:
	214	/* shouldn't be called with unsupported options */
	215	WARN_ON(1);
	216	break;
	217	}
	218
	219	return 0;
	220	}
	221
	222	int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
	223	{
	224	switch (opt) {
70e4272b NA	225	case BR_BOOLOPT_NO_LL_LEARN:
70e4272b NA	226	return br_opt_get(br, BROPT_NO_LL_LEARN);
a428afe8 NA	227	default:
	228	/* shouldn't be called with unsupported options */
	229	WARN_ON(1);
	230	break;
	231	}
	232
	233	return 0;
	234	}
	235
	236	int br_boolopt_multi_toggle(struct net_bridge *br,
	237	struct br_boolopt_multi *bm,
	238	struct netlink_ext_ack *extack)
	239	{
	240	unsigned long bitmap = bm->optmask;
	241	int err = 0;
	242	int opt_id;
	243
	244	for_each_set_bit(opt_id, &bitmap, BR_BOOLOPT_MAX) {
	245	bool on = !!(bm->optval & BIT(opt_id));
	246
	247	err = br_boolopt_toggle(br, opt_id, on, extack);
	248	if (err) {
	249	br_debug(br, "boolopt multi-toggle error: option: %d current: %d new: %d error: %d\n",
	250	opt_id, br_boolopt_get(br, opt_id), on, err);
	251	break;
	252	}
	253	}
	254
	255	return err;
	256	}
	257
	258	void br_boolopt_multi_get(const struct net_bridge *br,
	259	struct br_boolopt_multi *bm)
	260	{
	261	u32 optval = 0;
	262	int opt_id;
	263
	264	for (opt_id = 0; opt_id < BR_BOOLOPT_MAX; opt_id++)
	265	optval \|= (br_boolopt_get(br, opt_id) << opt_id);
	266
	267	bm->optval = optval;
1ed1ccb9	268	bm->optmask = GENMASK((BR_BOOLOPT_MAX - 1), 0);
a428afe8 NA	269	}
	270
	271	/* private bridge options, controlled by the kernel */
ae75767e NA	272	void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
	273	{
	274	bool cur = !!br_opt_get(br, opt);
	275
	276	br_debug(br, "toggle option: %d state: %d -> %d\n",
	277	opt, cur, on);
	278
	279	if (cur == on)
	280	return;
	281
	282	if (on)
	283	set_bit(opt, &br->options);
	284	else
	285	clear_bit(opt, &br->options);
	286	}
	287
b86f81cc WC	288	static void __net_exit br_net_exit(struct net *net)
	289	{
	290	struct net_device *dev;
	291	LIST_HEAD(list);
	292
	293	rtnl_lock();
	294	for_each_netdev(net, dev)
	295	if (dev->priv_flags & IFF_EBRIDGE)
	296	br_dev_delete(dev, &list);
	297
	298	unregister_netdevice_many(&list);
	299	rtnl_unlock();
	300
	301	}
cf0f02d0	302
712d6954 AD	303	static struct pernet_operations br_net_ops = {
	304	.exit = br_net_exit,
	305	};
	306
b86f81cc WC	307	static const struct stp_proto br_stp_proto = {
	308	.rcv = br_stp_rcv,
	309	};
	310
1da177e4 LT	311	static int __init br_init(void)
1da177e4 LT	312	{
c0909713 SH	313	int err;
c0909713 SH	314
71e168b1 FW	315	BUILD_BUG_ON(sizeof(struct br_input_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb));
71e168b1 FW	316
7c85fbf0 PM	317	err = stp_proto_register(&br_stp_proto);
7c85fbf0 PM	318	if (err < 0) {
28a16c97	319	pr_err("bridge: can't register sap for STP\n");
7c85fbf0	320	return err;
cf0f02d0 SH	321	}
cf0f02d0 SH	322
87a596e0 AM	323	err = br_fdb_init();
87a596e0 AM	324	if (err)
17efdd45	325	goto err_out;
1da177e4	326
712d6954	327	err = register_pernet_subsys(&br_net_ops);
c0909713 SH	328	if (err)
	329	goto err_out1;
	330
34666d46	331	err = br_nf_core_init();
c0909713 SH	332	if (err)
	333	goto err_out2;
	334
712d6954	335	err = register_netdevice_notifier(&br_device_notifier);
32fe21c0 TG	336	if (err)
	337	goto err_out3;
	338
ebb9a03a	339	err = register_switchdev_notifier(&br_switchdev_notifier);
712d6954 AD	340	if (err)
	341	goto err_out4;
	342
3aeb6617 JP	343	err = br_netlink_init();
	344	if (err)
	345	goto err_out5;
	346
1da177e4	347	brioctl_set(br_ioctl_deviceless_stub);
1da177e4	348
e6373c4c	349	#if IS_ENABLED(CONFIG_ATM_LANE)
da678292 MM	350	br_fdb_test_addr_hook = br_fdb_test_addr;
da678292 MM	351	#endif
1da177e4	352
d4ef9f72 SA	353	#if IS_MODULE(CONFIG_BRIDGE_NETFILTER)
	354	pr_info("bridge: filtering via arp/ip/ip6tables is no longer available "
	355	"by default. Update your scripts to load br_netfilter if you "
34666d46	356	"need this.\n");
d4ef9f72	357	#endif
34666d46	358
1da177e4	359	return 0;
34666d46	360
3aeb6617	361	err_out5:
ebb9a03a	362	unregister_switchdev_notifier(&br_switchdev_notifier);
712d6954	363	err_out4:
32fe21c0	364	unregister_netdevice_notifier(&br_device_notifier);
712d6954	365	err_out3:
34666d46	366	br_nf_core_fini();
712d6954 AD	367	err_out2:
712d6954 AD	368	unregister_pernet_subsys(&br_net_ops);
c0909713	369	err_out1:
17efdd45 PE	370	br_fdb_fini();
17efdd45 PE	371	err_out:
7c85fbf0	372	stp_proto_unregister(&br_stp_proto);
c0909713	373	return err;
1da177e4 LT	374	}
	375
	376	static void __exit br_deinit(void)
	377	{
7c85fbf0	378	stp_proto_unregister(&br_stp_proto);
11dc1f36	379	br_netlink_fini();
ebb9a03a	380	unregister_switchdev_notifier(&br_switchdev_notifier);
1da177e4 LT	381	unregister_netdevice_notifier(&br_device_notifier);
1da177e4 LT	382	brioctl_set(NULL);
712d6954	383	unregister_pernet_subsys(&br_net_ops);
1da177e4	384
473c22d7	385	rcu_barrier(); /* Wait for completion of call_rcu()'s */
1da177e4	386
34666d46	387	br_nf_core_fini();
e6373c4c	388	#if IS_ENABLED(CONFIG_ATM_LANE)
da678292 MM	389	br_fdb_test_addr_hook = NULL;
da678292 MM	390	#endif
1da177e4 LT	391	br_fdb_fini();
	392	}
	393
1da177e4 LT	394	module_init(br_init)
	395	module_exit(br_deinit)
	396	MODULE_LICENSE("GPL");
8cbb512e	397	MODULE_VERSION(BR_VERSION);
bb900b27	398	MODULE_ALIAS_RTNL_LINK("bridge");