[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 <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();
#if IS_ENABLED(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);
	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;
}

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 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;

#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_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,
};

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;
	dev->ethtool_ops = &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 | 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->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();
34666d46	39	#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
ea2d9b41 BDS	40	if (skb->nf_bridge && (skb->nf_bridge->mask & BRNF_BRIDGED_DNAT)) {
ea2d9b41 BDS	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);
5be5a2df	91	int err;
bb900b27	92
1c213bd2	93	br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
bb900b27	94	if (!br->stats)
	95	return -ENOMEM;
	96
5be5a2df VY	97	err = br_vlan_init(br);
	98	if (err)
	99	free_percpu(br->stats);
	100
	101	return err;
bb900b27	102	}
bb900b27	103
1da177e4 LT	104	static int br_dev_open(struct net_device *dev)
1da177e4 LT	105	{
81d35307	106	struct net_bridge *br = netdev_priv(dev);
1da177e4	107
c4d27ef9	108	netdev_update_features(dev);
81d35307 SH	109	netif_start_queue(dev);
81d35307 SH	110	br_stp_enable_bridge(br);
3fe2d7c7	111	br_multicast_open(br);
1da177e4 LT	112
	113	return 0;
	114	}
	115
	116	static void br_dev_set_multicast_list(struct net_device *dev)
	117	{
	118	}
	119
2796d0c6 VY	120	static void br_dev_change_rx_flags(struct net_device *dev, int change)
	121	{
	122	if (change & IFF_PROMISC)
	123	br_manage_promisc(netdev_priv(dev));
	124	}
	125
1da177e4 LT	126	static int br_dev_stop(struct net_device *dev)
1da177e4 LT	127	{
3fe2d7c7 HX	128	struct net_bridge *br = netdev_priv(dev);
	129
	130	br_stp_disable_bridge(br);
	131	br_multicast_stop(br);
1da177e4 LT	132
	133	netif_stop_queue(dev);
	134
	135	return 0;
	136	}
	137
28172739 ED	138	static struct rtnl_link_stats64 br_get_stats64(struct net_device dev,
28172739 ED	139	struct rtnl_link_stats64 *stats)
14bb4789	140	{
14bb4789	141	struct net_bridge *br = netdev_priv(dev);
8f84985f	142	struct pcpu_sw_netstats tmp, sum = { 0 };
14bb4789	143	unsigned int cpu;
	144
	145	for_each_possible_cpu(cpu) {
406818ff	146	unsigned int start;
8f84985f	147	const struct pcpu_sw_netstats *bstats
14bb4789	148	= per_cpu_ptr(br->stats, cpu);
406818ff	149	do {
57a7744e	150	start = u64_stats_fetch_begin_irq(&bstats->syncp);
406818ff	151	memcpy(&tmp, bstats, sizeof(tmp));
57a7744e	152	} while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
406818ff ED	153	sum.tx_bytes += tmp.tx_bytes;
	154	sum.tx_packets += tmp.tx_packets;
	155	sum.rx_bytes += tmp.rx_bytes;
	156	sum.rx_packets += tmp.rx_packets;
14bb4789	157	}
	158
	159	stats->tx_bytes = sum.tx_bytes;
	160	stats->tx_packets = sum.tx_packets;
	161	stats->rx_bytes = sum.rx_bytes;
	162	stats->rx_packets = sum.rx_packets;
	163
	164	return stats;
	165	}
	166
1da177e4 LT	167	static int br_change_mtu(struct net_device *dev, int new_mtu)
1da177e4 LT	168	{
4adf0af6 SW	169	struct net_bridge *br = netdev_priv(dev);
4adf0af6 SW	170	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(br))
1da177e4 LT	171	return -EINVAL;
	172
	173	dev->mtu = new_mtu;
4adf0af6	174
34666d46	175	#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
4adf0af6	176	/* remember the MTU in the rtable for PMTU */
defb3519	177	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
4adf0af6 SW	178	#endif
4adf0af6 SW	179
1da177e4 LT	180	return 0;
	181	}
	182
ffe1d49c	183	/* Allow setting mac address to any valid ethernet address. */
4505a3ef SH	184	static int br_set_mac_address(struct net_device dev, void p)
	185	{
	186	struct net_bridge *br = netdev_priv(dev);
	187	struct sockaddr *addr = p;
ffe1d49c SH	188
ffe1d49c SH	189	if (!is_valid_ether_addr(addr->sa_data))
7ca1e11a	190	return -EADDRNOTAVAIL;
4505a3ef SH	191
4505a3ef SH	192	spin_lock_bh(&br->lock);
9a7b6ef9	193	if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
a3ebb7ef	194	/* Mac address will be changed in br_stp_change_bridge_id(). */
43598813	195	br_stp_change_bridge_id(br, addr->sa_data);
43598813	196	}
4505a3ef SH	197	spin_unlock_bh(&br->lock);
4505a3ef SH	198
ffe1d49c	199	return 0;
4505a3ef SH	200	}
4505a3ef SH	201
edb5e46f SH	202	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
edb5e46f SH	203	{
7826d43f JP	204	strlcpy(info->driver, "bridge", sizeof(info->driver));
	205	strlcpy(info->version, BR_VERSION, sizeof(info->version));
	206	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
	207	strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
edb5e46f SH	208	}
edb5e46f SH	209
c8f44aff MM	210	static netdev_features_t br_fix_features(struct net_device *dev,
c8f44aff MM	211	netdev_features_t features)
edb5e46f SH	212	{
	213	struct net_bridge *br = netdev_priv(dev);
	214
c4d27ef9	215	return br_features_recompute(br, features);
361ff8a6 JG	216	}
361ff8a6 JG	217
c06ee961	218	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	219	static void br_poll_controller(struct net_device *br_dev)
c06ee961	220	{
c06ee961 WC	221	}
c06ee961 WC	222
91d2c34a	223	static void br_netpoll_cleanup(struct net_device *dev)
c06ee961	224	{
91d2c34a	225	struct net_bridge *br = netdev_priv(dev);
4e3828c4	226	struct net_bridge_port *p;
c06ee961	227
4e3828c4	228	list_for_each_entry(p, &br->port_list, list)
91d2c34a	229	br_netpoll_disable(p);
c06ee961 WC	230	}
c06ee961 WC	231
a8779ec1	232	static int __br_netpoll_enable(struct net_bridge_port *p)
dbe17307 CW	233	{
	234	struct netpoll *np;
	235	int err;
	236
a8779ec1	237	np = kzalloc(sizeof(*p->np), GFP_KERNEL);
dbe17307 CW	238	if (!np)
	239	return -ENOMEM;
	240
a8779ec1	241	err = __netpoll_setup(np, p->dev);
dbe17307 CW	242	if (err) {
	243	kfree(np);
	244	return err;
	245	}
	246
	247	p->np = np;
	248	return err;
	249	}
	250
a8779ec1	251	int br_netpoll_enable(struct net_bridge_port *p)
dbe17307 CW	252	{
	253	if (!p->br->dev->npinfo)
	254	return 0;
	255
a8779ec1	256	return __br_netpoll_enable(p);
dbe17307 CW	257	}
dbe17307 CW	258
a8779ec1	259	static int br_netpoll_setup(struct net_device dev, struct netpoll_info ni)
c06ee961	260	{
cfb478da	261	struct net_bridge *br = netdev_priv(dev);
4e3828c4	262	struct net_bridge_port *p;
91d2c34a	263	int err = 0;
c06ee961	264
4e3828c4	265	list_for_each_entry(p, &br->port_list, list) {
91d2c34a HX	266	if (!p->dev)
91d2c34a HX	267	continue;
a8779ec1	268	err = __br_netpoll_enable(p);
91d2c34a HX	269	if (err)
91d2c34a HX	270	goto fail;
c06ee961	271	}
91d2c34a HX	272
	273	out:
	274	return err;
	275
	276	fail:
	277	br_netpoll_cleanup(dev);
	278	goto out;
c06ee961 WC	279	}
c06ee961 WC	280
91d2c34a	281	void br_netpoll_disable(struct net_bridge_port *p)
c06ee961	282	{
91d2c34a HX	283	struct netpoll *np = p->np;
	284
	285	if (!np)
	286	return;
	287
	288	p->np = NULL;
	289
2cde6acd	290	__netpoll_free_async(np);
c06ee961 WC	291	}
	292
	293	#endif
	294
afc6151a JP	295	static int br_add_slave(struct net_device dev, struct net_device slave_dev)
	296
	297	{
	298	struct net_bridge *br = netdev_priv(dev);
	299
	300	return br_add_if(br, slave_dev);
	301	}
	302
	303	static int br_del_slave(struct net_device dev, struct net_device slave_dev)
	304	{
	305	struct net_bridge *br = netdev_priv(dev);
	306
	307	return br_del_if(br, slave_dev);
	308	}
	309
a2dbb882	310	static const struct ethtool_ops br_ethtool_ops = {
e4119a43 SH	311	.get_drvinfo = br_getinfo,
e4119a43 SH	312	.get_link = ethtool_op_get_link,
edb5e46f SH	313	};
edb5e46f SH	314
a2dbb882 SH	315	static const struct net_device_ops br_netdev_ops = {
	316	.ndo_open = br_dev_open,
	317	.ndo_stop = br_dev_stop,
bb900b27	318	.ndo_init = br_dev_init,
00829823	319	.ndo_start_xmit = br_dev_xmit,
406818ff	320	.ndo_get_stats64 = br_get_stats64,
00829823	321	.ndo_set_mac_address = br_set_mac_address,
afc4b13d	322	.ndo_set_rx_mode = br_dev_set_multicast_list,
2796d0c6	323	.ndo_change_rx_flags = br_dev_change_rx_flags,
00829823 SH	324	.ndo_change_mtu = br_change_mtu,
00829823 SH	325	.ndo_do_ioctl = br_dev_ioctl,
c06ee961	326	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a	327	.ndo_netpoll_setup = br_netpoll_setup,
c06ee961 WC	328	.ndo_netpoll_cleanup = br_netpoll_cleanup,
	329	.ndo_poll_controller = br_poll_controller,
	330	#endif
afc6151a JP	331	.ndo_add_slave = br_add_slave,
afc6151a JP	332	.ndo_del_slave = br_del_slave,
c4d27ef9	333	.ndo_fix_features = br_fix_features,
77162022 JF	334	.ndo_fdb_add = br_fdb_add,
	335	.ndo_fdb_del = br_fdb_delete,
	336	.ndo_fdb_dump = br_fdb_dump,
e5a55a89 JF	337	.ndo_bridge_getlink = br_getlink,
e5a55a89 JF	338	.ndo_bridge_setlink = br_setlink,
407af329	339	.ndo_bridge_dellink = br_dellink,
a2dbb882 SH	340	};
a2dbb882 SH	341
14bb4789	342	static void br_dev_free(struct net_device *dev)
	343	{
	344	struct net_bridge *br = netdev_priv(dev);
	345
	346	free_percpu(br->stats);
	347	free_netdev(dev);
	348	}
	349
bb900b27	350	static struct device_type br_type = {
	351	.name = "bridge",
	352	};
	353
1da177e4 LT	354	void br_dev_setup(struct net_device *dev)
1da177e4 LT	355	{
bb900b27	356	struct net_bridge *br = netdev_priv(dev);
bb900b27	357
7ce5d222	358	eth_hw_addr_random(dev);
1da177e4 LT	359	ether_setup(dev);
1da177e4 LT	360
a2dbb882	361	dev->netdev_ops = &br_netdev_ops;
14bb4789	362	dev->destructor = br_dev_free;
7ad24ea4	363	dev->ethtool_ops = &br_ethtool_ops;
bb900b27	364	SET_NETDEV_DEVTYPE(dev, &br_type);
1da177e4	365	dev->tx_queue_len = 0;
1da177e4	366	dev->priv_flags = IFF_EBRIDGE;
edb5e46f	367
161f65ba	368	dev->features = COMMON_FEATURES \| NETIF_F_LLTX \| NETIF_F_NETNS_LOCAL \|
1c5abb6c TM	369	NETIF_F_HW_VLAN_CTAG_TX \| NETIF_F_HW_VLAN_STAG_TX;
	370	dev->hw_features = COMMON_FEATURES \| NETIF_F_HW_VLAN_CTAG_TX \|
	371	NETIF_F_HW_VLAN_STAG_TX;
161f65ba	372	dev->vlan_features = COMMON_FEATURES;
bb900b27	373
	374	br->dev = dev;
	375	spin_lock_init(&br->lock);
	376	INIT_LIST_HEAD(&br->port_list);
	377	spin_lock_init(&br->hash_lock);
	378
	379	br->bridge_id.prio[0] = 0x80;
	380	br->bridge_id.prio[1] = 0x00;
	381
e5a727f6	382	ether_addr_copy(br->group_addr, eth_reserved_addr_base);
bb900b27	383
bb900b27	384	br->stp_enabled = BR_NO_STP;
515853cc	385	br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
f2808d22	386	br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
515853cc	387
bb900b27	388	br->designated_root = br->bridge_id;
	389	br->bridge_max_age = br->max_age = 20 * HZ;
	390	br->bridge_hello_time = br->hello_time = 2 * HZ;
	391	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
	392	br->ageing_time = 300 * HZ;
	393
	394	br_netfilter_rtable_init(br);
	395	br_stp_timer_init(br);
	396	br_multicast_init(br);
1da177e4	397	}