[linux-block.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 <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);
	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);
	const struct nf_br_ops *nf_ops;
	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_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;

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