[mirror_ubuntu-focal-kernel.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) {
		if (event == NETDEV_REGISTER) {
			/* register of bridge completed, add sysfs entries */
			br_sysfs_addbr(dev);
			return NOTIFY_DONE;
		}
		br_vlan_bridge_event(dev, event, ptr);
	}

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