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

/*
 *	Device handling code
 *	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/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 <asm/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)

/* 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);
	const unsigned char *dest = skb->data;
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_mdb_entry *mdst;
	struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
	u16 vid = 0;

	rcu_read_lock();
#ifdef CONFIG_BRIDGE_NETFILTER
	if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
		br_nf_pre_routing_finish_bridge_slow(skb);
		rcu_read_unlock();
		return NETDEV_TX_OK;
	}
#endif

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

	BR_INPUT_SKB_CB(skb)->brdev = dev;

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

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

	if (is_broadcast_ether_addr(dest))
		br_flood_deliver(br, skb, false);
	else if (is_multicast_ether_addr(dest)) {
		if (unlikely(netpoll_tx_running(dev))) {
			br_flood_deliver(br, skb, false);
			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_deliver(mdst, skb);
		else
			br_flood_deliver(br, skb, false);
	} else if ((dst = __br_fdb_get(br, dest, vid)) != NULL)
		br_deliver(dst->dst, skb);
	else
		br_flood_deliver(br, skb, true);

out:
	rcu_read_unlock();
	return NETDEV_TX_OK;
}

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

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

	return 0;
}

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 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 struct rtnl_link_stats64 *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;

	return stats;
}

static int br_change_mtu(struct net_device *dev, int new_mtu)
{
	struct net_bridge *br = netdev_priv(dev);
	if (new_mtu < 68 || new_mtu > br_min_mtu(br))
		return -EINVAL;

	dev->mtu = new_mtu;

#ifdef 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 net_bridge *br = netdev_priv(dev);

	return br_add_if(br, slave_dev);
}

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_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_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,
};

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

	free_percpu(br->stats);
	free_netdev(dev);
}

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->destructor = br_dev_free;
	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
	SET_NETDEV_DEVTYPE(dev, &br_type);
	dev->tx_queue_len = 0;
	dev->priv_flags = IFF_EBRIDGE;

	dev->features = COMMON_FEATURES | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL |
			NETIF_F_HW_VLAN_CTAG_TX;
	dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_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->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->ageing_time = 300 * HZ;

	br_netfilter_rtable_init(br);
	br_stp_timer_init(br);
	br_multicast_init(br);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Device handling code
	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
	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
1da177e4 LT	22	#include <asm/uaccess.h>
	23	#include "br_private.h"
	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
eeaf61d8	28	/* net device transmit always called with BH disabled */
6fef4c0c	29	netdev_tx_t br_dev_xmit(struct sk_buff skb, struct net_device dev)
1da177e4 LT	30	{
	31	struct net_bridge *br = netdev_priv(dev);
	32	const unsigned char *dest = skb->data;
	33	struct net_bridge_fdb_entry *dst;
c4fcb78c	34	struct net_bridge_mdb_entry *mdst;
8f84985f	35	struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
78851988	36	u16 vid = 0;
1da177e4	37
c03307ea	38	rcu_read_lock();
ea2d9b41 BDS	39	#ifdef CONFIG_BRIDGE_NETFILTER
	40	if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
	41	br_nf_pre_routing_finish_bridge_slow(skb);
c03307ea	42	rcu_read_unlock();
ea2d9b41 BDS	43	return NETDEV_TX_OK;
	44	}
	45	#endif
	46
406818ff	47	u64_stats_update_begin(&brstats->syncp);
14bb4789	48	brstats->tx_packets++;
14bb4789	49	brstats->tx_bytes += skb->len;
406818ff	50	u64_stats_update_end(&brstats->syncp);
6088a539	51
14bb4789	52	BR_INPUT_SKB_CB(skb)->brdev = dev;
1da177e4	53
459a98ed	54	skb_reset_mac_header(skb);
1da177e4 LT	55	skb_pull(skb, ETH_HLEN);
1da177e4 LT	56
12464bb8 TM	57	if (!br_allowed_ingress(br, br_get_vlan_info(br), skb, &vid))
	58	goto out;
	59
44661462	60	if (is_broadcast_ether_addr(dest))
867a5943	61	br_flood_deliver(br, skb, false);
44661462	62	else if (is_multicast_ether_addr(dest)) {
91d2c34a	63	if (unlikely(netpoll_tx_running(dev))) {
867a5943	64	br_flood_deliver(br, skb, false);
91d2c34a HX	65	goto out;
91d2c34a HX	66	}
06499098	67	if (br_multicast_rcv(br, NULL, skb, vid)) {
6d1d1d39	68	kfree_skb(skb);
c4fcb78c	69	goto out;
6d1d1d39	70	}
c4fcb78c	71
fbca58a2	72	mdst = br_mdb_get(br, skb, vid);
b00589af	73	if ((mdst \|\| BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
cc0fdd80	74	br_multicast_querier_exists(br, eth_hdr(skb)))
c4fcb78c HX	75	br_multicast_deliver(mdst, skb);
c4fcb78c HX	76	else
867a5943	77	br_flood_deliver(br, skb, false);
2ba071ec	78	} else if ((dst = __br_fdb_get(br, dest, vid)) != NULL)
1da177e4 LT	79	br_deliver(dst->dst, skb);
1da177e4 LT	80	else
867a5943	81	br_flood_deliver(br, skb, true);
1da177e4	82
c4fcb78c	83	out:
eeaf61d8	84	rcu_read_unlock();
6ed10654	85	return NETDEV_TX_OK;
1da177e4 LT	86	}
1da177e4 LT	87
bb900b27	88	static int br_dev_init(struct net_device *dev)
	89	{
	90	struct net_bridge *br = netdev_priv(dev);
	91
1c213bd2	92	br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
bb900b27	93	if (!br->stats)
	94	return -ENOMEM;
	95
	96	return 0;
	97	}
	98
1da177e4 LT	99	static int br_dev_open(struct net_device *dev)
1da177e4 LT	100	{
81d35307	101	struct net_bridge *br = netdev_priv(dev);
1da177e4	102
c4d27ef9	103	netdev_update_features(dev);
81d35307 SH	104	netif_start_queue(dev);
81d35307 SH	105	br_stp_enable_bridge(br);
3fe2d7c7	106	br_multicast_open(br);
1da177e4 LT	107
	108	return 0;
	109	}
	110
	111	static void br_dev_set_multicast_list(struct net_device *dev)
	112	{
	113	}
	114
	115	static int br_dev_stop(struct net_device *dev)
	116	{
3fe2d7c7 HX	117	struct net_bridge *br = netdev_priv(dev);
	118
	119	br_stp_disable_bridge(br);
	120	br_multicast_stop(br);
1da177e4 LT	121
	122	netif_stop_queue(dev);
	123
	124	return 0;
	125	}
	126
28172739 ED	127	static struct rtnl_link_stats64 br_get_stats64(struct net_device dev,
28172739 ED	128	struct rtnl_link_stats64 *stats)
14bb4789	129	{
14bb4789	130	struct net_bridge *br = netdev_priv(dev);
8f84985f	131	struct pcpu_sw_netstats tmp, sum = { 0 };
14bb4789	132	unsigned int cpu;
	133
	134	for_each_possible_cpu(cpu) {
406818ff	135	unsigned int start;
8f84985f	136	const struct pcpu_sw_netstats *bstats
14bb4789	137	= per_cpu_ptr(br->stats, cpu);
406818ff	138	do {
57a7744e	139	start = u64_stats_fetch_begin_irq(&bstats->syncp);
406818ff	140	memcpy(&tmp, bstats, sizeof(tmp));
57a7744e	141	} while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
406818ff ED	142	sum.tx_bytes += tmp.tx_bytes;
	143	sum.tx_packets += tmp.tx_packets;
	144	sum.rx_bytes += tmp.rx_bytes;
	145	sum.rx_packets += tmp.rx_packets;
14bb4789	146	}
	147
	148	stats->tx_bytes = sum.tx_bytes;
	149	stats->tx_packets = sum.tx_packets;
	150	stats->rx_bytes = sum.rx_bytes;
	151	stats->rx_packets = sum.rx_packets;
	152
	153	return stats;
	154	}
	155
1da177e4 LT	156	static int br_change_mtu(struct net_device *dev, int new_mtu)
1da177e4 LT	157	{
4adf0af6 SW	158	struct net_bridge *br = netdev_priv(dev);
4adf0af6 SW	159	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(br))
1da177e4 LT	160	return -EINVAL;
	161
	162	dev->mtu = new_mtu;
4adf0af6 SW	163
	164	#ifdef CONFIG_BRIDGE_NETFILTER
	165	/* remember the MTU in the rtable for PMTU */
defb3519	166	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
4adf0af6 SW	167	#endif
4adf0af6 SW	168
1da177e4 LT	169	return 0;
	170	}
	171
ffe1d49c	172	/* Allow setting mac address to any valid ethernet address. */
4505a3ef SH	173	static int br_set_mac_address(struct net_device dev, void p)
	174	{
	175	struct net_bridge *br = netdev_priv(dev);
	176	struct sockaddr *addr = p;
ffe1d49c SH	177
ffe1d49c SH	178	if (!is_valid_ether_addr(addr->sa_data))
7ca1e11a	179	return -EADDRNOTAVAIL;
4505a3ef SH	180
4505a3ef SH	181	spin_lock_bh(&br->lock);
9a7b6ef9	182	if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
a3ebb7ef	183	/* Mac address will be changed in br_stp_change_bridge_id(). */
43598813	184	br_stp_change_bridge_id(br, addr->sa_data);
43598813	185	}
4505a3ef SH	186	spin_unlock_bh(&br->lock);
4505a3ef SH	187
ffe1d49c	188	return 0;
4505a3ef SH	189	}
4505a3ef SH	190
edb5e46f SH	191	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
edb5e46f SH	192	{
7826d43f JP	193	strlcpy(info->driver, "bridge", sizeof(info->driver));
	194	strlcpy(info->version, BR_VERSION, sizeof(info->version));
	195	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
	196	strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
edb5e46f SH	197	}
edb5e46f SH	198
c8f44aff MM	199	static netdev_features_t br_fix_features(struct net_device *dev,
c8f44aff MM	200	netdev_features_t features)
edb5e46f SH	201	{
	202	struct net_bridge *br = netdev_priv(dev);
	203
c4d27ef9	204	return br_features_recompute(br, features);
361ff8a6 JG	205	}
361ff8a6 JG	206
c06ee961	207	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	208	static void br_poll_controller(struct net_device *br_dev)
c06ee961	209	{
c06ee961 WC	210	}
c06ee961 WC	211
91d2c34a	212	static void br_netpoll_cleanup(struct net_device *dev)
c06ee961	213	{
91d2c34a	214	struct net_bridge *br = netdev_priv(dev);
4e3828c4	215	struct net_bridge_port *p;
c06ee961	216
4e3828c4	217	list_for_each_entry(p, &br->port_list, list)
91d2c34a	218	br_netpoll_disable(p);
c06ee961 WC	219	}
c06ee961 WC	220
a8779ec1	221	static int __br_netpoll_enable(struct net_bridge_port *p)
dbe17307 CW	222	{
	223	struct netpoll *np;
	224	int err;
	225
a8779ec1	226	np = kzalloc(sizeof(*p->np), GFP_KERNEL);
dbe17307 CW	227	if (!np)
	228	return -ENOMEM;
	229
a8779ec1	230	err = __netpoll_setup(np, p->dev);
dbe17307 CW	231	if (err) {
	232	kfree(np);
	233	return err;
	234	}
	235
	236	p->np = np;
	237	return err;
	238	}
	239
a8779ec1	240	int br_netpoll_enable(struct net_bridge_port *p)
dbe17307 CW	241	{
	242	if (!p->br->dev->npinfo)
	243	return 0;
	244
a8779ec1	245	return __br_netpoll_enable(p);
dbe17307 CW	246	}
dbe17307 CW	247
a8779ec1	248	static int br_netpoll_setup(struct net_device dev, struct netpoll_info ni)
c06ee961	249	{
cfb478da	250	struct net_bridge *br = netdev_priv(dev);
4e3828c4	251	struct net_bridge_port *p;
91d2c34a	252	int err = 0;
c06ee961	253
4e3828c4	254	list_for_each_entry(p, &br->port_list, list) {
91d2c34a HX	255	if (!p->dev)
91d2c34a HX	256	continue;
a8779ec1	257	err = __br_netpoll_enable(p);
91d2c34a HX	258	if (err)
91d2c34a HX	259	goto fail;
c06ee961	260	}
91d2c34a HX	261
	262	out:
	263	return err;
	264
	265	fail:
	266	br_netpoll_cleanup(dev);
	267	goto out;
c06ee961 WC	268	}
c06ee961 WC	269
91d2c34a	270	void br_netpoll_disable(struct net_bridge_port *p)
c06ee961	271	{
91d2c34a HX	272	struct netpoll *np = p->np;
	273
	274	if (!np)
	275	return;
	276
	277	p->np = NULL;
	278
2cde6acd	279	__netpoll_free_async(np);
c06ee961 WC	280	}
	281
	282	#endif
	283
afc6151a JP	284	static int br_add_slave(struct net_device dev, struct net_device slave_dev)
	285
	286	{
	287	struct net_bridge *br = netdev_priv(dev);
	288
	289	return br_add_if(br, slave_dev);
	290	}
	291
	292	static int br_del_slave(struct net_device dev, struct net_device slave_dev)
	293	{
	294	struct net_bridge *br = netdev_priv(dev);
	295
	296	return br_del_if(br, slave_dev);
	297	}
	298
a2dbb882	299	static const struct ethtool_ops br_ethtool_ops = {
e4119a43 SH	300	.get_drvinfo = br_getinfo,
e4119a43 SH	301	.get_link = ethtool_op_get_link,
edb5e46f SH	302	};
edb5e46f SH	303
a2dbb882 SH	304	static const struct net_device_ops br_netdev_ops = {
	305	.ndo_open = br_dev_open,
	306	.ndo_stop = br_dev_stop,
bb900b27	307	.ndo_init = br_dev_init,
00829823	308	.ndo_start_xmit = br_dev_xmit,
406818ff	309	.ndo_get_stats64 = br_get_stats64,
00829823	310	.ndo_set_mac_address = br_set_mac_address,
afc4b13d	311	.ndo_set_rx_mode = br_dev_set_multicast_list,
00829823 SH	312	.ndo_change_mtu = br_change_mtu,
00829823 SH	313	.ndo_do_ioctl = br_dev_ioctl,
c06ee961	314	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	315	.ndo_netpoll_setup = br_netpoll_setup,
c06ee961 WC	316	.ndo_netpoll_cleanup = br_netpoll_cleanup,
	317	.ndo_poll_controller = br_poll_controller,
	318	#endif
afc6151a JP	319	.ndo_add_slave = br_add_slave,
afc6151a JP	320	.ndo_del_slave = br_del_slave,
c4d27ef9	321	.ndo_fix_features = br_fix_features,
77162022 JF	322	.ndo_fdb_add = br_fdb_add,
	323	.ndo_fdb_del = br_fdb_delete,
	324	.ndo_fdb_dump = br_fdb_dump,
e5a55a89 JF	325	.ndo_bridge_getlink = br_getlink,
e5a55a89 JF	326	.ndo_bridge_setlink = br_setlink,
407af329	327	.ndo_bridge_dellink = br_dellink,
a2dbb882 SH	328	};
a2dbb882 SH	329
14bb4789	330	static void br_dev_free(struct net_device *dev)
	331	{
	332	struct net_bridge *br = netdev_priv(dev);
	333
	334	free_percpu(br->stats);
	335	free_netdev(dev);
	336	}
	337
bb900b27	338	static struct device_type br_type = {
	339	.name = "bridge",
	340	};
	341
1da177e4 LT	342	void br_dev_setup(struct net_device *dev)
1da177e4 LT	343	{
bb900b27	344	struct net_bridge *br = netdev_priv(dev);
bb900b27	345
7ce5d222	346	eth_hw_addr_random(dev);
1da177e4 LT	347	ether_setup(dev);
1da177e4 LT	348
a2dbb882	349	dev->netdev_ops = &br_netdev_ops;
14bb4789	350	dev->destructor = br_dev_free;
9d6f229f	351	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
bb900b27	352	SET_NETDEV_DEVTYPE(dev, &br_type);
1da177e4	353	dev->tx_queue_len = 0;
1da177e4	354	dev->priv_flags = IFF_EBRIDGE;
edb5e46f	355
161f65ba VY	356	dev->features = COMMON_FEATURES \| NETIF_F_LLTX \| NETIF_F_NETNS_LOCAL \|
	357	NETIF_F_HW_VLAN_CTAG_TX;
	358	dev->hw_features = COMMON_FEATURES \| NETIF_F_HW_VLAN_CTAG_TX;
	359	dev->vlan_features = COMMON_FEATURES;
bb900b27	360
	361	br->dev = dev;
	362	spin_lock_init(&br->lock);
	363	INIT_LIST_HEAD(&br->port_list);
	364	spin_lock_init(&br->hash_lock);
	365
	366	br->bridge_id.prio[0] = 0x80;
	367	br->bridge_id.prio[1] = 0x00;
	368
e5a727f6	369	ether_addr_copy(br->group_addr, eth_reserved_addr_base);
bb900b27	370
bb900b27	371	br->stp_enabled = BR_NO_STP;
515853cc	372	br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
515853cc	373
bb900b27	374	br->designated_root = br->bridge_id;
	375	br->bridge_max_age = br->max_age = 20 * HZ;
	376	br->bridge_hello_time = br->hello_time = 2 * HZ;
	377	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
	378	br->ageing_time = 300 * HZ;
	379
	380	br_netfilter_rtable_init(br);
	381	br_stp_timer_init(br);
	382	br_multicast_init(br);
1da177e4	383	}