[linux.git] / net / bridge / br_device.c

/*
 *	Device handling code
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<[email protected]>
 *
 *	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/kernel.h>
#include <linux/netdevice.h>
#include <linux/netpoll.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/list.h>
#include <linux/netfilter_bridge.h>

#include <linux/uaccess.h>
#include "br_private.h"

#define COMMON_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | \
			 NETIF_F_GSO_MASK | NETIF_F_HW_CSUM)

const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
EXPORT_SYMBOL_GPL(nf_br_ops);

static struct lock_class_key bridge_netdev_addr_lock_key;

/* net device transmit always called with BH disabled */
netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_mdb_entry *mdst;
	struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
	const struct nf_br_ops *nf_ops;
	const unsigned char *dest;
	u16 vid = 0;

	rcu_read_lock();
	nf_ops = rcu_dereference(nf_br_ops);
	if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
		rcu_read_unlock();
		return NETDEV_TX_OK;
	}

	u64_stats_update_begin(&brstats->syncp);
	brstats->tx_packets++;
	brstats->tx_bytes += skb->len;
	u64_stats_update_end(&brstats->syncp);

	br_switchdev_frame_unmark(skb);
	BR_INPUT_SKB_CB(skb)->brdev = dev;

	skb_reset_mac_header(skb);
	skb_pull(skb, ETH_HLEN);

	if (!br_allowed_ingress(br, br_vlan_group_rcu(br), skb, &vid))
		goto out;

	dest = eth_hdr(skb)->h_dest;
	if (is_broadcast_ether_addr(dest)) {
		br_flood(br, skb, BR_PKT_BROADCAST, false, true);
	} else if (is_multicast_ether_addr(dest)) {
		if (unlikely(netpoll_tx_running(dev))) {
			br_flood(br, skb, BR_PKT_MULTICAST, false, true);
			goto out;
		}
		if (br_multicast_rcv(br, NULL, skb, vid)) {
			kfree_skb(skb);
			goto out;
		}

		mdst = br_mdb_get(br, skb, vid);
		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
		    br_multicast_querier_exists(br, eth_hdr(skb)))
			br_multicast_flood(mdst, skb, false, true);
		else
			br_flood(br, skb, BR_PKT_MULTICAST, false, true);
	} else if ((dst = br_fdb_find_rcu(br, dest, vid)) != NULL) {
		br_forward(dst->dst, skb, false, true);
	} else {
		br_flood(br, skb, BR_PKT_UNICAST, false, true);
	}
out:
	rcu_read_unlock();
	return NETDEV_TX_OK;
}

static void br_set_lockdep_class(struct net_device *dev)
{
	lockdep_set_class(&dev->addr_list_lock, &bridge_netdev_addr_lock_key);
}

static int br_dev_init(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	int err;

	br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
	if (!br->stats)
		return -ENOMEM;

	err = br_vlan_init(br);
	if (err) {
		free_percpu(br->stats);
		return err;
	}

	err = br_multicast_init_stats(br);
	if (err) {
		free_percpu(br->stats);
		br_vlan_flush(br);
	}
	br_set_lockdep_class(dev);

	return err;
}

static void br_dev_uninit(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	br_multicast_dev_del(br);
	br_multicast_uninit_stats(br);
	br_vlan_flush(br);
	free_percpu(br->stats);
}

static int br_dev_open(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	netdev_update_features(dev);
	netif_start_queue(dev);
	br_stp_enable_bridge(br);
	br_multicast_open(br);

	return 0;
}

static void br_dev_set_multicast_list(struct net_device *dev)
{
}

static void br_dev_change_rx_flags(struct net_device *dev, int change)
{
	if (change & IFF_PROMISC)
		br_manage_promisc(netdev_priv(dev));
}

static int br_dev_stop(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	br_stp_disable_bridge(br);
	br_multicast_stop(br);

	netif_stop_queue(dev);

	return 0;
}

static void br_get_stats64(struct net_device *dev,
			   struct rtnl_link_stats64 *stats)
{
	struct net_bridge *br = netdev_priv(dev);
	struct pcpu_sw_netstats tmp, sum = { 0 };
	unsigned int cpu;

	for_each_possible_cpu(cpu) {
		unsigned int start;
		const struct pcpu_sw_netstats *bstats
			= per_cpu_ptr(br->stats, cpu);
		do {
			start = u64_stats_fetch_begin_irq(&bstats->syncp);
			memcpy(&tmp, bstats, sizeof(tmp));
		} while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
		sum.tx_bytes   += tmp.tx_bytes;
		sum.tx_packets += tmp.tx_packets;
		sum.rx_bytes   += tmp.rx_bytes;
		sum.rx_packets += tmp.rx_packets;
	}

	stats->tx_bytes   = sum.tx_bytes;
	stats->tx_packets = sum.tx_packets;
	stats->rx_bytes   = sum.rx_bytes;
	stats->rx_packets = sum.rx_packets;
}

static int br_change_mtu(struct net_device *dev, int new_mtu)
{
	struct net_bridge *br = netdev_priv(dev);
	if (new_mtu > br_min_mtu(br))
		return -EINVAL;

	dev->mtu = new_mtu;

#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
	/* remember the MTU in the rtable for PMTU */
	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
#endif

	return 0;
}

/* Allow setting mac address to any valid ethernet address. */
static int br_set_mac_address(struct net_device *dev, void *p)
{
	struct net_bridge *br = netdev_priv(dev);
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	spin_lock_bh(&br->lock);
	if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
		/* Mac address will be changed in br_stp_change_bridge_id(). */
		br_stp_change_bridge_id(br, addr->sa_data);
	}
	spin_unlock_bh(&br->lock);

	return 0;
}

static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	strlcpy(info->driver, "bridge", sizeof(info->driver));
	strlcpy(info->version, BR_VERSION, sizeof(info->version));
	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
	strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
}

static netdev_features_t br_fix_features(struct net_device *dev,
	netdev_features_t features)
{
	struct net_bridge *br = netdev_priv(dev);

	return br_features_recompute(br, features);
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void br_poll_controller(struct net_device *br_dev)
{
}

static void br_netpoll_cleanup(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_port *p;

	list_for_each_entry(p, &br->port_list, list)
		br_netpoll_disable(p);
}

static int __br_netpoll_enable(struct net_bridge_port *p)
{
	struct netpoll *np;
	int err;

	np = kzalloc(sizeof(*p->np), GFP_KERNEL);
	if (!np)
		return -ENOMEM;

	err = __netpoll_setup(np, p->dev);
	if (err) {
		kfree(np);
		return err;
	}

	p->np = np;
	return err;
}

int br_netpoll_enable(struct net_bridge_port *p)
{
	if (!p->br->dev->npinfo)
		return 0;

	return __br_netpoll_enable(p);
}

static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_port *p;
	int err = 0;

	list_for_each_entry(p, &br->port_list, list) {
		if (!p->dev)
			continue;
		err = __br_netpoll_enable(p);
		if (err)
			goto fail;
	}

out:
	return err;

fail:
	br_netpoll_cleanup(dev);
	goto out;
}

void br_netpoll_disable(struct net_bridge_port *p)
{
	struct netpoll *np = p->np;

	if (!np)
		return;

	p->np = NULL;

	__netpoll_free_async(np);
}

#endif

static int br_add_slave(struct net_device *dev, struct net_device *slave_dev,
			struct netlink_ext_ack *extack)

{
	struct net_bridge *br = netdev_priv(dev);

	return br_add_if(br, slave_dev, extack);
}

static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
{
	struct net_bridge *br = netdev_priv(dev);

	return br_del_if(br, slave_dev);
}

static const struct ethtool_ops br_ethtool_ops = {
	.get_drvinfo    = br_getinfo,
	.get_link	= ethtool_op_get_link,
};

static const struct net_device_ops br_netdev_ops = {
	.ndo_open		 = br_dev_open,
	.ndo_stop		 = br_dev_stop,
	.ndo_init		 = br_dev_init,
	.ndo_uninit		 = br_dev_uninit,
	.ndo_start_xmit		 = br_dev_xmit,
	.ndo_get_stats64	 = br_get_stats64,
	.ndo_set_mac_address	 = br_set_mac_address,
	.ndo_set_rx_mode	 = br_dev_set_multicast_list,
	.ndo_change_rx_flags	 = br_dev_change_rx_flags,
	.ndo_change_mtu		 = br_change_mtu,
	.ndo_do_ioctl		 = br_dev_ioctl,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_netpoll_setup	 = br_netpoll_setup,
	.ndo_netpoll_cleanup	 = br_netpoll_cleanup,
	.ndo_poll_controller	 = br_poll_controller,
#endif
	.ndo_add_slave		 = br_add_slave,
	.ndo_del_slave		 = br_del_slave,
	.ndo_fix_features        = br_fix_features,
	.ndo_fdb_add		 = br_fdb_add,
	.ndo_fdb_del		 = br_fdb_delete,
	.ndo_fdb_dump		 = br_fdb_dump,
	.ndo_bridge_getlink	 = br_getlink,
	.ndo_bridge_setlink	 = br_setlink,
	.ndo_bridge_dellink	 = br_dellink,
	.ndo_features_check	 = passthru_features_check,
};

static struct device_type br_type = {
	.name	= "bridge",
};

void br_dev_setup(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	eth_hw_addr_random(dev);
	ether_setup(dev);

	dev->netdev_ops = &br_netdev_ops;
	dev->needs_free_netdev = true;
	dev->ethtool_ops = &br_ethtool_ops;
	SET_NETDEV_DEVTYPE(dev, &br_type);
	dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;

	dev->features = COMMON_FEATURES | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL |
			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
	dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
			   NETIF_F_HW_VLAN_STAG_TX;
	dev->vlan_features = COMMON_FEATURES;

	br->dev = dev;
	spin_lock_init(&br->lock);
	INIT_LIST_HEAD(&br->port_list);
	spin_lock_init(&br->hash_lock);

	br->bridge_id.prio[0] = 0x80;
	br->bridge_id.prio[1] = 0x00;

	ether_addr_copy(br->group_addr, eth_reserved_addr_base);

	br->stp_enabled = BR_NO_STP;
	br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
	br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;

	br->designated_root = br->bridge_id;
	br->bridge_max_age = br->max_age = 20 * HZ;
	br->bridge_hello_time = br->hello_time = 2 * HZ;
	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
	br->bridge_ageing_time = br->ageing_time = BR_DEFAULT_AGEING_TIME;
	dev->max_mtu = ETH_MAX_MTU;

	br_netfilter_rtable_init(br);
	br_stp_timer_init(br);
	br_multicast_init(br);
	INIT_DELAYED_WORK(&br->gc_work, br_fdb_cleanup);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Device handling code
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <[email protected]>
	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
	14	#include <linux/kernel.h>
	15	#include <linux/netdevice.h>
c06ee961	16	#include <linux/netpoll.h>
4505a3ef	17	#include <linux/etherdevice.h>
edb5e46f	18	#include <linux/ethtool.h>
c06ee961	19	#include <linux/list.h>
ea2d9b41	20	#include <linux/netfilter_bridge.h>
4505a3ef	21
7c0f6ba6	22	#include <linux/uaccess.h>
1da177e4 LT	23	#include "br_private.h"
1da177e4 LT	24
161f65ba VY	25	#define COMMON_FEATURES (NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA \| \
	26	NETIF_F_GSO_MASK \| NETIF_F_HW_CSUM)
	27
1a4ba64d PNA	28	const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
	29	EXPORT_SYMBOL_GPL(nf_br_ops);
	30
c6894dec NA	31	static struct lock_class_key bridge_netdev_addr_lock_key;
c6894dec NA	32
eeaf61d8	33	/* net device transmit always called with BH disabled */
6fef4c0c	34	netdev_tx_t br_dev_xmit(struct sk_buff skb, struct net_device dev)
1da177e4 LT	35	{
1da177e4 LT	36	struct net_bridge *br = netdev_priv(dev);
1da177e4	37	struct net_bridge_fdb_entry *dst;
c4fcb78c	38	struct net_bridge_mdb_entry *mdst;
8f84985f	39	struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
1a4ba64d	40	const struct nf_br_ops *nf_ops;
31a4562d	41	const unsigned char *dest;
78851988	42	u16 vid = 0;
1da177e4	43
c03307ea	44	rcu_read_lock();
1a4ba64d PNA	45	nf_ops = rcu_dereference(nf_br_ops);
1a4ba64d PNA	46	if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
c03307ea	47	rcu_read_unlock();
ea2d9b41 BDS	48	return NETDEV_TX_OK;
ea2d9b41 BDS	49	}
ea2d9b41	50
406818ff	51	u64_stats_update_begin(&brstats->syncp);
14bb4789	52	brstats->tx_packets++;
14bb4789	53	brstats->tx_bytes += skb->len;
406818ff	54	u64_stats_update_end(&brstats->syncp);
6088a539	55
f1c2eddf	56	br_switchdev_frame_unmark(skb);
14bb4789	57	BR_INPUT_SKB_CB(skb)->brdev = dev;
1da177e4	58
459a98ed	59	skb_reset_mac_header(skb);
1da177e4 LT	60	skb_pull(skb, ETH_HLEN);
1da177e4 LT	61
907b1e6e	62	if (!br_allowed_ingress(br, br_vlan_group_rcu(br), skb, &vid))
12464bb8 TM	63	goto out;
12464bb8 TM	64
31a4562d	65	dest = eth_hdr(skb)->h_dest;
37b090e6	66	if (is_broadcast_ether_addr(dest)) {
8addd5e7	67	br_flood(br, skb, BR_PKT_BROADCAST, false, true);
37b090e6	68	} else if (is_multicast_ether_addr(dest)) {
91d2c34a	69	if (unlikely(netpoll_tx_running(dev))) {
8addd5e7	70	br_flood(br, skb, BR_PKT_MULTICAST, false, true);
91d2c34a HX	71	goto out;
91d2c34a HX	72	}
06499098	73	if (br_multicast_rcv(br, NULL, skb, vid)) {
6d1d1d39	74	kfree_skb(skb);
c4fcb78c	75	goto out;
6d1d1d39	76	}
c4fcb78c	77
fbca58a2	78	mdst = br_mdb_get(br, skb, vid);
b00589af	79	if ((mdst \|\| BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
cc0fdd80	80	br_multicast_querier_exists(br, eth_hdr(skb)))
37b090e6	81	br_multicast_flood(mdst, skb, false, true);
c4fcb78c	82	else
8addd5e7	83	br_flood(br, skb, BR_PKT_MULTICAST, false, true);
bfd0aeac	84	} else if ((dst = br_fdb_find_rcu(br, dest, vid)) != NULL) {
37b090e6 NA	85	br_forward(dst->dst, skb, false, true);
37b090e6 NA	86	} else {
8addd5e7	87	br_flood(br, skb, BR_PKT_UNICAST, false, true);
37b090e6	88	}
c4fcb78c	89	out:
eeaf61d8	90	rcu_read_unlock();
6ed10654	91	return NETDEV_TX_OK;
1da177e4 LT	92	}
1da177e4 LT	93
c6894dec NA	94	static void br_set_lockdep_class(struct net_device *dev)
	95	{
	96	lockdep_set_class(&dev->addr_list_lock, &bridge_netdev_addr_lock_key);
	97	}
	98
bb900b27	99	static int br_dev_init(struct net_device *dev)
	100	{
	101	struct net_bridge *br = netdev_priv(dev);
5be5a2df	102	int err;
bb900b27	103
1c213bd2	104	br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
bb900b27	105	if (!br->stats)
	106	return -ENOMEM;
	107
5be5a2df	108	err = br_vlan_init(br);
1080ab95	109	if (err) {
5be5a2df	110	free_percpu(br->stats);
1080ab95 NA	111	return err;
	112	}
	113
	114	err = br_multicast_init_stats(br);
	115	if (err) {
	116	free_percpu(br->stats);
	117	br_vlan_flush(br);
	118	}
c6894dec	119	br_set_lockdep_class(dev);
5be5a2df VY	120
5be5a2df VY	121	return err;
bb900b27	122	}
bb900b27	123
b6fe0440 IS	124	static void br_dev_uninit(struct net_device *dev)
	125	{
	126	struct net_bridge *br = netdev_priv(dev);
	127
b1b9d366	128	br_multicast_dev_del(br);
b6fe0440 IS	129	br_multicast_uninit_stats(br);
	130	br_vlan_flush(br);
	131	free_percpu(br->stats);
	132	}
	133
1da177e4 LT	134	static int br_dev_open(struct net_device *dev)
1da177e4 LT	135	{
81d35307	136	struct net_bridge *br = netdev_priv(dev);
1da177e4	137
c4d27ef9	138	netdev_update_features(dev);
81d35307 SH	139	netif_start_queue(dev);
81d35307 SH	140	br_stp_enable_bridge(br);
3fe2d7c7	141	br_multicast_open(br);
1da177e4 LT	142
	143	return 0;
	144	}
	145
	146	static void br_dev_set_multicast_list(struct net_device *dev)
	147	{
	148	}
	149
2796d0c6 VY	150	static void br_dev_change_rx_flags(struct net_device *dev, int change)
	151	{
	152	if (change & IFF_PROMISC)
	153	br_manage_promisc(netdev_priv(dev));
	154	}
	155
1da177e4 LT	156	static int br_dev_stop(struct net_device *dev)
1da177e4 LT	157	{
3fe2d7c7 HX	158	struct net_bridge *br = netdev_priv(dev);
	159
	160	br_stp_disable_bridge(br);
	161	br_multicast_stop(br);
1da177e4 LT	162
	163	netif_stop_queue(dev);
	164
	165	return 0;
	166	}
	167
bc1f4470	168	static void br_get_stats64(struct net_device *dev,
bc1f4470	169	struct rtnl_link_stats64 *stats)
14bb4789	170	{
14bb4789	171	struct net_bridge *br = netdev_priv(dev);
8f84985f	172	struct pcpu_sw_netstats tmp, sum = { 0 };
14bb4789	173	unsigned int cpu;
	174
	175	for_each_possible_cpu(cpu) {
406818ff	176	unsigned int start;
8f84985f	177	const struct pcpu_sw_netstats *bstats
14bb4789	178	= per_cpu_ptr(br->stats, cpu);
406818ff	179	do {
57a7744e	180	start = u64_stats_fetch_begin_irq(&bstats->syncp);
406818ff	181	memcpy(&tmp, bstats, sizeof(tmp));
57a7744e	182	} while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
406818ff ED	183	sum.tx_bytes += tmp.tx_bytes;
	184	sum.tx_packets += tmp.tx_packets;
	185	sum.rx_bytes += tmp.rx_bytes;
	186	sum.rx_packets += tmp.rx_packets;
14bb4789	187	}
	188
	189	stats->tx_bytes = sum.tx_bytes;
	190	stats->tx_packets = sum.tx_packets;
	191	stats->rx_bytes = sum.rx_bytes;
	192	stats->rx_packets = sum.rx_packets;
14bb4789	193	}
14bb4789	194
1da177e4 LT	195	static int br_change_mtu(struct net_device *dev, int new_mtu)
1da177e4 LT	196	{
4adf0af6	197	struct net_bridge *br = netdev_priv(dev);
91572088	198	if (new_mtu > br_min_mtu(br))
1da177e4 LT	199	return -EINVAL;
	200
	201	dev->mtu = new_mtu;
4adf0af6	202
34666d46	203	#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
4adf0af6	204	/* remember the MTU in the rtable for PMTU */
defb3519	205	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
4adf0af6 SW	206	#endif
4adf0af6 SW	207
1da177e4 LT	208	return 0;
	209	}
	210
ffe1d49c	211	/* Allow setting mac address to any valid ethernet address. */
4505a3ef SH	212	static int br_set_mac_address(struct net_device dev, void p)
	213	{
	214	struct net_bridge *br = netdev_priv(dev);
	215	struct sockaddr *addr = p;
ffe1d49c SH	216
ffe1d49c SH	217	if (!is_valid_ether_addr(addr->sa_data))
7ca1e11a	218	return -EADDRNOTAVAIL;
4505a3ef SH	219
4505a3ef SH	220	spin_lock_bh(&br->lock);
9a7b6ef9	221	if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
a3ebb7ef	222	/* Mac address will be changed in br_stp_change_bridge_id(). */
43598813	223	br_stp_change_bridge_id(br, addr->sa_data);
43598813	224	}
4505a3ef SH	225	spin_unlock_bh(&br->lock);
4505a3ef SH	226
ffe1d49c	227	return 0;
4505a3ef SH	228	}
4505a3ef SH	229
edb5e46f SH	230	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
edb5e46f SH	231	{
7826d43f JP	232	strlcpy(info->driver, "bridge", sizeof(info->driver));
	233	strlcpy(info->version, BR_VERSION, sizeof(info->version));
	234	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
	235	strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
edb5e46f SH	236	}
edb5e46f SH	237
c8f44aff MM	238	static netdev_features_t br_fix_features(struct net_device *dev,
c8f44aff MM	239	netdev_features_t features)
edb5e46f SH	240	{
	241	struct net_bridge *br = netdev_priv(dev);
	242
c4d27ef9	243	return br_features_recompute(br, features);
361ff8a6 JG	244	}
361ff8a6 JG	245
c06ee961	246	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	247	static void br_poll_controller(struct net_device *br_dev)
c06ee961	248	{
c06ee961 WC	249	}
c06ee961 WC	250
91d2c34a	251	static void br_netpoll_cleanup(struct net_device *dev)
c06ee961	252	{
91d2c34a	253	struct net_bridge *br = netdev_priv(dev);
4e3828c4	254	struct net_bridge_port *p;
c06ee961	255
4e3828c4	256	list_for_each_entry(p, &br->port_list, list)
91d2c34a	257	br_netpoll_disable(p);
c06ee961 WC	258	}
c06ee961 WC	259
a8779ec1	260	static int __br_netpoll_enable(struct net_bridge_port *p)
dbe17307 CW	261	{
	262	struct netpoll *np;
	263	int err;
	264
a8779ec1	265	np = kzalloc(sizeof(*p->np), GFP_KERNEL);
dbe17307 CW	266	if (!np)
	267	return -ENOMEM;
	268
a8779ec1	269	err = __netpoll_setup(np, p->dev);
dbe17307 CW	270	if (err) {
	271	kfree(np);
	272	return err;
	273	}
	274
	275	p->np = np;
	276	return err;
	277	}
	278
a8779ec1	279	int br_netpoll_enable(struct net_bridge_port *p)
dbe17307 CW	280	{
	281	if (!p->br->dev->npinfo)
	282	return 0;
	283
a8779ec1	284	return __br_netpoll_enable(p);
dbe17307 CW	285	}
dbe17307 CW	286
a8779ec1	287	static int br_netpoll_setup(struct net_device dev, struct netpoll_info ni)
c06ee961	288	{
cfb478da	289	struct net_bridge *br = netdev_priv(dev);
4e3828c4	290	struct net_bridge_port *p;
91d2c34a	291	int err = 0;
c06ee961	292
4e3828c4	293	list_for_each_entry(p, &br->port_list, list) {
91d2c34a HX	294	if (!p->dev)
91d2c34a HX	295	continue;
a8779ec1	296	err = __br_netpoll_enable(p);
91d2c34a HX	297	if (err)
91d2c34a HX	298	goto fail;
c06ee961	299	}
91d2c34a HX	300
	301	out:
	302	return err;
	303
	304	fail:
	305	br_netpoll_cleanup(dev);
	306	goto out;
c06ee961 WC	307	}
c06ee961 WC	308
91d2c34a	309	void br_netpoll_disable(struct net_bridge_port *p)
c06ee961	310	{
91d2c34a HX	311	struct netpoll *np = p->np;
	312
	313	if (!np)
	314	return;
	315
	316	p->np = NULL;
	317
2cde6acd	318	__netpoll_free_async(np);
c06ee961 WC	319	}
	320
	321	#endif
	322
33eaf2a6 DA	323	static int br_add_slave(struct net_device dev, struct net_device slave_dev,
33eaf2a6 DA	324	struct netlink_ext_ack *extack)
afc6151a JP	325
	326	{
	327	struct net_bridge *br = netdev_priv(dev);
	328
ca752be0	329	return br_add_if(br, slave_dev, extack);
afc6151a JP	330	}
	331
	332	static int br_del_slave(struct net_device dev, struct net_device slave_dev)
	333	{
	334	struct net_bridge *br = netdev_priv(dev);
	335
	336	return br_del_if(br, slave_dev);
	337	}
	338
a2dbb882	339	static const struct ethtool_ops br_ethtool_ops = {
e4119a43 SH	340	.get_drvinfo = br_getinfo,
e4119a43 SH	341	.get_link = ethtool_op_get_link,
edb5e46f SH	342	};
edb5e46f SH	343
a2dbb882 SH	344	static const struct net_device_ops br_netdev_ops = {
	345	.ndo_open = br_dev_open,
	346	.ndo_stop = br_dev_stop,
bb900b27	347	.ndo_init = br_dev_init,
b6fe0440	348	.ndo_uninit = br_dev_uninit,
00829823	349	.ndo_start_xmit = br_dev_xmit,
406818ff	350	.ndo_get_stats64 = br_get_stats64,
00829823	351	.ndo_set_mac_address = br_set_mac_address,
afc4b13d	352	.ndo_set_rx_mode = br_dev_set_multicast_list,
2796d0c6	353	.ndo_change_rx_flags = br_dev_change_rx_flags,
00829823 SH	354	.ndo_change_mtu = br_change_mtu,
00829823 SH	355	.ndo_do_ioctl = br_dev_ioctl,
c06ee961	356	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	357	.ndo_netpoll_setup = br_netpoll_setup,
c06ee961 WC	358	.ndo_netpoll_cleanup = br_netpoll_cleanup,
	359	.ndo_poll_controller = br_poll_controller,
	360	#endif
afc6151a JP	361	.ndo_add_slave = br_add_slave,
afc6151a JP	362	.ndo_del_slave = br_del_slave,
c4d27ef9	363	.ndo_fix_features = br_fix_features,
77162022 JF	364	.ndo_fdb_add = br_fdb_add,
	365	.ndo_fdb_del = br_fdb_delete,
	366	.ndo_fdb_dump = br_fdb_dump,
e5a55a89 JF	367	.ndo_bridge_getlink = br_getlink,
e5a55a89 JF	368	.ndo_bridge_setlink = br_setlink,
407af329	369	.ndo_bridge_dellink = br_dellink,
66780530	370	.ndo_features_check = passthru_features_check,
a2dbb882 SH	371	};
a2dbb882 SH	372
bb900b27	373	static struct device_type br_type = {
	374	.name = "bridge",
	375	};
	376
1da177e4 LT	377	void br_dev_setup(struct net_device *dev)
1da177e4 LT	378	{
bb900b27	379	struct net_bridge *br = netdev_priv(dev);
bb900b27	380
7ce5d222	381	eth_hw_addr_random(dev);
1da177e4 LT	382	ether_setup(dev);
1da177e4 LT	383
a2dbb882	384	dev->netdev_ops = &br_netdev_ops;
cf124db5	385	dev->needs_free_netdev = true;
7ad24ea4	386	dev->ethtool_ops = &br_ethtool_ops;
bb900b27	387	SET_NETDEV_DEVTYPE(dev, &br_type);
ccecb2a4	388	dev->priv_flags = IFF_EBRIDGE \| IFF_NO_QUEUE;
edb5e46f	389
161f65ba	390	dev->features = COMMON_FEATURES \| NETIF_F_LLTX \| NETIF_F_NETNS_LOCAL \|
1c5abb6c TM	391	NETIF_F_HW_VLAN_CTAG_TX \| NETIF_F_HW_VLAN_STAG_TX;
	392	dev->hw_features = COMMON_FEATURES \| NETIF_F_HW_VLAN_CTAG_TX \|
	393	NETIF_F_HW_VLAN_STAG_TX;
161f65ba	394	dev->vlan_features = COMMON_FEATURES;
bb900b27	395
	396	br->dev = dev;
	397	spin_lock_init(&br->lock);
	398	INIT_LIST_HEAD(&br->port_list);
	399	spin_lock_init(&br->hash_lock);
	400
	401	br->bridge_id.prio[0] = 0x80;
	402	br->bridge_id.prio[1] = 0x00;
	403
e5a727f6	404	ether_addr_copy(br->group_addr, eth_reserved_addr_base);
bb900b27	405
bb900b27	406	br->stp_enabled = BR_NO_STP;
515853cc	407	br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
f2808d22	408	br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
515853cc	409
bb900b27	410	br->designated_root = br->bridge_id;
	411	br->bridge_max_age = br->max_age = 20 * HZ;
	412	br->bridge_hello_time = br->hello_time = 2 * HZ;
	413	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
34d8acd8	414	br->bridge_ageing_time = br->ageing_time = BR_DEFAULT_AGEING_TIME;
91572088	415	dev->max_mtu = ETH_MAX_MTU;
bb900b27	416
	417	br_netfilter_rtable_init(br);
	418	br_stp_timer_init(br);
	419	br_multicast_init(br);
f7cdee8a	420	INIT_DELAYED_WORK(&br->gc_work, br_fdb_cleanup);
1da177e4	421	}