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