[mirror_ubuntu-bionic-kernel.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"

/* 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 br_cpu_netstats *brstats = this_cpu_ptr(br->stats);

#ifdef CONFIG_BRIDGE_NETFILTER
	if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
		br_nf_pre_routing_finish_bridge_slow(skb);
		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);

	rcu_read_lock();
	if (is_broadcast_ether_addr(dest))
		br_flood_deliver(br, skb);
	else if (is_multicast_ether_addr(dest)) {
		if (unlikely(netpoll_tx_running(dev))) {
			br_flood_deliver(br, skb);
			goto out;
		}
		if (br_multicast_rcv(br, NULL, skb)) {
			kfree_skb(skb);
			goto out;
		}

		mdst = br_mdb_get(br, skb);
		if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb))
			br_multicast_deliver(mdst, skb);
		else
			br_flood_deliver(br, skb);
	} else if ((dst = __br_fdb_get(br, dest)) != NULL)
		br_deliver(dst->dst, skb);
	else
		br_flood_deliver(br, skb);

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 = alloc_percpu(struct br_cpu_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 br_cpu_netstats tmp, sum = { 0 };
	unsigned int cpu;

	for_each_possible_cpu(cpu) {
		unsigned int start;
		const struct br_cpu_netstats *bstats
			= per_cpu_ptr(br->stats, cpu);
		do {
			start = u64_stats_fetch_begin(&bstats->syncp);
			memcpy(&tmp, bstats, sizeof(tmp));
		} while (u64_stats_fetch_retry(&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 -EINVAL;

	spin_lock_bh(&br->lock);
	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
	br_stp_change_bridge_id(br, addr->sa_data);
	br->flags |= BR_SET_MAC_ADDR;
	spin_unlock_bh(&br->lock);

	return 0;
}

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

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, *n;

	list_for_each_entry_safe(p, n, &br->port_list, list) {
		br_netpoll_disable(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, *n;
	int err = 0;

	list_for_each_entry_safe(p, n, &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;
}

int br_netpoll_enable(struct net_bridge_port *p)
{
	struct netpoll *np;
	int err = 0;

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

	np->dev = p->dev;
	strlcpy(np->dev_name, p->dev->name, IFNAMSIZ);

	err = __netpoll_setup(np);
	if (err) {
		kfree(np);
		goto out;
	}

	p->np = np;

out:
	return err;
}

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

	if (!np)
		return;

	p->np = NULL;

	/* Wait for transmitting packets to finish before freeing. */
	synchronize_rcu_bh();

	__netpoll_cleanup(np);
	kfree(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,
};

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);

	random_ether_addr(dev->dev_addr);
	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 = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
			NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | NETIF_F_LLTX |
			NETIF_F_NETNS_LOCAL | NETIF_F_HW_VLAN_TX;
	dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
			   NETIF_F_GSO_MASK | NETIF_F_HW_CSUM |
			   NETIF_F_HW_VLAN_TX;

	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;

	memcpy(br->group_addr, br_group_address, ETH_ALEN);

	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
eeaf61d8	25	/* net device transmit always called with BH disabled */
6fef4c0c	26	netdev_tx_t br_dev_xmit(struct sk_buff skb, struct net_device dev)
1da177e4 LT	27	{
	28	struct net_bridge *br = netdev_priv(dev);
	29	const unsigned char *dest = skb->data;
	30	struct net_bridge_fdb_entry *dst;
c4fcb78c	31	struct net_bridge_mdb_entry *mdst;
14bb4789	32	struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
1da177e4	33
ea2d9b41 BDS	34	#ifdef CONFIG_BRIDGE_NETFILTER
	35	if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
	36	br_nf_pre_routing_finish_bridge_slow(skb);
	37	return NETDEV_TX_OK;
	38	}
	39	#endif
	40
406818ff	41	u64_stats_update_begin(&brstats->syncp);
14bb4789	42	brstats->tx_packets++;
14bb4789	43	brstats->tx_bytes += skb->len;
406818ff	44	u64_stats_update_end(&brstats->syncp);
6088a539	45
14bb4789	46	BR_INPUT_SKB_CB(skb)->brdev = dev;
1da177e4	47
459a98ed	48	skb_reset_mac_header(skb);
1da177e4 LT	49	skb_pull(skb, ETH_HLEN);
1da177e4 LT	50
eeaf61d8	51	rcu_read_lock();
44661462 HX	52	if (is_broadcast_ether_addr(dest))
	53	br_flood_deliver(br, skb);
	54	else if (is_multicast_ether_addr(dest)) {
91d2c34a HX	55	if (unlikely(netpoll_tx_running(dev))) {
	56	br_flood_deliver(br, skb);
	57	goto out;
	58	}
6d1d1d39 HX	59	if (br_multicast_rcv(br, NULL, skb)) {
6d1d1d39 HX	60	kfree_skb(skb);
c4fcb78c	61	goto out;
6d1d1d39	62	}
c4fcb78c HX	63
c4fcb78c HX	64	mdst = br_mdb_get(br, skb);
32dec5dd	65	if (mdst \|\| BR_INPUT_SKB_CB_MROUTERS_ONLY(skb))
c4fcb78c HX	66	br_multicast_deliver(mdst, skb);
	67	else
	68	br_flood_deliver(br, skb);
	69	} else if ((dst = __br_fdb_get(br, dest)) != NULL)
1da177e4 LT	70	br_deliver(dst->dst, skb);
1da177e4 LT	71	else
e081e1e3	72	br_flood_deliver(br, skb);
1da177e4	73
c4fcb78c	74	out:
eeaf61d8	75	rcu_read_unlock();
6ed10654	76	return NETDEV_TX_OK;
1da177e4 LT	77	}
1da177e4 LT	78
bb900b27	79	static int br_dev_init(struct net_device *dev)
	80	{
	81	struct net_bridge *br = netdev_priv(dev);
	82
	83	br->stats = alloc_percpu(struct br_cpu_netstats);
	84	if (!br->stats)
	85	return -ENOMEM;
	86
	87	return 0;
	88	}
	89
1da177e4 LT	90	static int br_dev_open(struct net_device *dev)
1da177e4 LT	91	{
81d35307	92	struct net_bridge *br = netdev_priv(dev);
1da177e4	93
c4d27ef9	94	netdev_update_features(dev);
81d35307 SH	95	netif_start_queue(dev);
81d35307 SH	96	br_stp_enable_bridge(br);
3fe2d7c7	97	br_multicast_open(br);
1da177e4 LT	98
	99	return 0;
	100	}
	101
	102	static void br_dev_set_multicast_list(struct net_device *dev)
	103	{
	104	}
	105
	106	static int br_dev_stop(struct net_device *dev)
	107	{
3fe2d7c7 HX	108	struct net_bridge *br = netdev_priv(dev);
	109
	110	br_stp_disable_bridge(br);
	111	br_multicast_stop(br);
1da177e4 LT	112
	113	netif_stop_queue(dev);
	114
	115	return 0;
	116	}
	117
28172739 ED	118	static struct rtnl_link_stats64 br_get_stats64(struct net_device dev,
28172739 ED	119	struct rtnl_link_stats64 *stats)
14bb4789	120	{
14bb4789	121	struct net_bridge *br = netdev_priv(dev);
406818ff	122	struct br_cpu_netstats tmp, sum = { 0 };
14bb4789	123	unsigned int cpu;
	124
	125	for_each_possible_cpu(cpu) {
406818ff	126	unsigned int start;
14bb4789	127	const struct br_cpu_netstats *bstats
14bb4789	128	= per_cpu_ptr(br->stats, cpu);
406818ff ED	129	do {
	130	start = u64_stats_fetch_begin(&bstats->syncp);
	131	memcpy(&tmp, bstats, sizeof(tmp));
	132	} while (u64_stats_fetch_retry(&bstats->syncp, start));
	133	sum.tx_bytes += tmp.tx_bytes;
	134	sum.tx_packets += tmp.tx_packets;
	135	sum.rx_bytes += tmp.rx_bytes;
	136	sum.rx_packets += tmp.rx_packets;
14bb4789	137	}
	138
	139	stats->tx_bytes = sum.tx_bytes;
	140	stats->tx_packets = sum.tx_packets;
	141	stats->rx_bytes = sum.rx_bytes;
	142	stats->rx_packets = sum.rx_packets;
	143
	144	return stats;
	145	}
	146
1da177e4 LT	147	static int br_change_mtu(struct net_device *dev, int new_mtu)
1da177e4 LT	148	{
4adf0af6 SW	149	struct net_bridge *br = netdev_priv(dev);
4adf0af6 SW	150	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(br))
1da177e4 LT	151	return -EINVAL;
	152
	153	dev->mtu = new_mtu;
4adf0af6 SW	154
	155	#ifdef CONFIG_BRIDGE_NETFILTER
	156	/* remember the MTU in the rtable for PMTU */
defb3519	157	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
4adf0af6 SW	158	#endif
4adf0af6 SW	159
1da177e4 LT	160	return 0;
	161	}
	162
ffe1d49c	163	/* Allow setting mac address to any valid ethernet address. */
4505a3ef SH	164	static int br_set_mac_address(struct net_device dev, void p)
	165	{
	166	struct net_bridge *br = netdev_priv(dev);
	167	struct sockaddr *addr = p;
ffe1d49c SH	168
	169	if (!is_valid_ether_addr(addr->sa_data))
	170	return -EINVAL;
4505a3ef SH	171
4505a3ef SH	172	spin_lock_bh(&br->lock);
ffe1d49c SH	173	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
ffe1d49c SH	174	br_stp_change_bridge_id(br, addr->sa_data);
92c0574f	175	br->flags \|= BR_SET_MAC_ADDR;
4505a3ef SH	176	spin_unlock_bh(&br->lock);
4505a3ef SH	177
ffe1d49c	178	return 0;
4505a3ef SH	179	}
4505a3ef SH	180
edb5e46f SH	181	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
	182	{
	183	strcpy(info->driver, "bridge");
	184	strcpy(info->version, BR_VERSION);
	185	strcpy(info->fw_version, "N/A");
	186	strcpy(info->bus_info, "N/A");
	187	}
	188
c8f44aff MM	189	static netdev_features_t br_fix_features(struct net_device *dev,
c8f44aff MM	190	netdev_features_t features)
edb5e46f SH	191	{
	192	struct net_bridge *br = netdev_priv(dev);
	193
c4d27ef9	194	return br_features_recompute(br, features);
361ff8a6 JG	195	}
361ff8a6 JG	196
c06ee961	197	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	198	static void br_poll_controller(struct net_device *br_dev)
c06ee961	199	{
c06ee961 WC	200	}
c06ee961 WC	201
91d2c34a	202	static void br_netpoll_cleanup(struct net_device *dev)
c06ee961	203	{
91d2c34a HX	204	struct net_bridge *br = netdev_priv(dev);
91d2c34a HX	205	struct net_bridge_port p, n;
c06ee961	206
91d2c34a HX	207	list_for_each_entry_safe(p, n, &br->port_list, list) {
	208	br_netpoll_disable(p);
	209	}
c06ee961 WC	210	}
c06ee961 WC	211
91d2c34a	212	static int br_netpoll_setup(struct net_device dev, struct netpoll_info ni)
c06ee961	213	{
cfb478da	214	struct net_bridge *br = netdev_priv(dev);
c06ee961	215	struct net_bridge_port p, n;
91d2c34a	216	int err = 0;
c06ee961	217
c06ee961	218	list_for_each_entry_safe(p, n, &br->port_list, list) {
91d2c34a HX	219	if (!p->dev)
	220	continue;
	221
	222	err = br_netpoll_enable(p);
	223	if (err)
	224	goto fail;
c06ee961	225	}
91d2c34a HX	226
	227	out:
	228	return err;
	229
	230	fail:
	231	br_netpoll_cleanup(dev);
	232	goto out;
c06ee961 WC	233	}
c06ee961 WC	234
91d2c34a	235	int br_netpoll_enable(struct net_bridge_port *p)
cfb478da	236	{
91d2c34a HX	237	struct netpoll *np;
	238	int err = 0;
	239
	240	np = kzalloc(sizeof(*p->np), GFP_KERNEL);
	241	err = -ENOMEM;
	242	if (!np)
	243	goto out;
	244
	245	np->dev = p->dev;
cefa9993	246	strlcpy(np->dev_name, p->dev->name, IFNAMSIZ);
91d2c34a HX	247
	248	err = __netpoll_setup(np);
	249	if (err) {
	250	kfree(np);
	251	goto out;
	252	}
	253
	254	p->np = np;
	255
	256	out:
	257	return err;
cfb478da	258	}
c06ee961	259
91d2c34a	260	void br_netpoll_disable(struct net_bridge_port *p)
c06ee961	261	{
91d2c34a HX	262	struct netpoll *np = p->np;
	263
	264	if (!np)
	265	return;
	266
	267	p->np = NULL;
	268
	269	/* Wait for transmitting packets to finish before freeing. */
	270	synchronize_rcu_bh();
	271
	272	__netpoll_cleanup(np);
	273	kfree(np);
c06ee961 WC	274	}
	275
	276	#endif
	277
afc6151a JP	278	static int br_add_slave(struct net_device dev, struct net_device slave_dev)
	279
	280	{
	281	struct net_bridge *br = netdev_priv(dev);
	282
	283	return br_add_if(br, slave_dev);
	284	}
	285
	286	static int br_del_slave(struct net_device dev, struct net_device slave_dev)
	287	{
	288	struct net_bridge *br = netdev_priv(dev);
	289
	290	return br_del_if(br, slave_dev);
	291	}
	292
a2dbb882	293	static const struct ethtool_ops br_ethtool_ops = {
e4119a43 SH	294	.get_drvinfo = br_getinfo,
e4119a43 SH	295	.get_link = ethtool_op_get_link,
edb5e46f SH	296	};
edb5e46f SH	297
a2dbb882 SH	298	static const struct net_device_ops br_netdev_ops = {
	299	.ndo_open = br_dev_open,
	300	.ndo_stop = br_dev_stop,
bb900b27	301	.ndo_init = br_dev_init,
00829823	302	.ndo_start_xmit = br_dev_xmit,
406818ff	303	.ndo_get_stats64 = br_get_stats64,
00829823	304	.ndo_set_mac_address = br_set_mac_address,
afc4b13d	305	.ndo_set_rx_mode = br_dev_set_multicast_list,
00829823 SH	306	.ndo_change_mtu = br_change_mtu,
00829823 SH	307	.ndo_do_ioctl = br_dev_ioctl,
c06ee961	308	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	309	.ndo_netpoll_setup = br_netpoll_setup,
c06ee961 WC	310	.ndo_netpoll_cleanup = br_netpoll_cleanup,
	311	.ndo_poll_controller = br_poll_controller,
	312	#endif
afc6151a JP	313	.ndo_add_slave = br_add_slave,
afc6151a JP	314	.ndo_del_slave = br_del_slave,
c4d27ef9	315	.ndo_fix_features = br_fix_features,
a2dbb882 SH	316	};
a2dbb882 SH	317
14bb4789	318	static void br_dev_free(struct net_device *dev)
	319	{
	320	struct net_bridge *br = netdev_priv(dev);
	321
	322	free_percpu(br->stats);
	323	free_netdev(dev);
	324	}
	325
bb900b27	326	static struct device_type br_type = {
	327	.name = "bridge",
	328	};
	329
1da177e4 LT	330	void br_dev_setup(struct net_device *dev)
1da177e4 LT	331	{
bb900b27	332	struct net_bridge *br = netdev_priv(dev);
bb900b27	333
3ae41254	334	random_ether_addr(dev->dev_addr);
1da177e4 LT	335	ether_setup(dev);
1da177e4 LT	336
a2dbb882	337	dev->netdev_ops = &br_netdev_ops;
14bb4789	338	dev->destructor = br_dev_free;
9d6f229f	339	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
bb900b27	340	SET_NETDEV_DEVTYPE(dev, &br_type);
1da177e4	341	dev->tx_queue_len = 0;
1da177e4	342	dev->priv_flags = IFF_EBRIDGE;
edb5e46f	343
9d6f229f	344	dev->features = NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA \|
34324dc2	345	NETIF_F_GSO_MASK \| NETIF_F_HW_CSUM \| NETIF_F_LLTX \|
c4d27ef9 MM	346	NETIF_F_NETNS_LOCAL \| NETIF_F_HW_VLAN_TX;
c4d27ef9 MM	347	dev->hw_features = NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA \|
34324dc2	348	NETIF_F_GSO_MASK \| NETIF_F_HW_CSUM \|
c4d27ef9	349	NETIF_F_HW_VLAN_TX;
bb900b27	350
	351	br->dev = dev;
	352	spin_lock_init(&br->lock);
	353	INIT_LIST_HEAD(&br->port_list);
	354	spin_lock_init(&br->hash_lock);
	355
	356	br->bridge_id.prio[0] = 0x80;
	357	br->bridge_id.prio[1] = 0x00;
	358
	359	memcpy(br->group_addr, br_group_address, ETH_ALEN);
	360
bb900b27	361	br->stp_enabled = BR_NO_STP;
515853cc	362	br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
515853cc	363
bb900b27	364	br->designated_root = br->bridge_id;
	365	br->bridge_max_age = br->max_age = 20 * HZ;
	366	br->bridge_hello_time = br->hello_time = 2 * HZ;
	367	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
	368	br->ageing_time = 300 * HZ;
	369
	370	br_netfilter_rtable_init(br);
	371	br_stp_timer_init(br);
	372	br_multicast_init(br);
1da177e4	373	}