[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/etherdevice.h>
#include <linux/ethtool.h>

#include <asm/uaccess.h>
#include "br_private.h"

/* net device transmit always called with no BH (preempt_disabled) */
int 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;

	dev->stats.tx_packets++;
	dev->stats.tx_bytes += skb->len;

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

	if (dest[0] & 1)
		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);

	return 0;
}

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

	br_features_recompute(br);
	netif_start_queue(dev);
	br_stp_enable_bridge(br);

	return 0;
}

static void br_dev_set_multicast_list(struct net_device *dev)
{
}

static int br_dev_stop(struct net_device *dev)
{
	br_stp_disable_bridge(netdev_priv(dev));

	netif_stop_queue(dev);

	return 0;
}

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

	dev->mtu = new_mtu;
	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 int br_set_sg(struct net_device *dev, u32 data)
{
	struct net_bridge *br = netdev_priv(dev);

	if (data)
		br->feature_mask |= NETIF_F_SG;
	else
		br->feature_mask &= ~NETIF_F_SG;

	br_features_recompute(br);
	return 0;
}

static int br_set_tso(struct net_device *dev, u32 data)
{
	struct net_bridge *br = netdev_priv(dev);

	if (data)
		br->feature_mask |= NETIF_F_TSO;
	else
		br->feature_mask &= ~NETIF_F_TSO;

	br_features_recompute(br);
	return 0;
}

static int br_set_tx_csum(struct net_device *dev, u32 data)
{
	struct net_bridge *br = netdev_priv(dev);

	if (data)
		br->feature_mask |= NETIF_F_NO_CSUM;
	else
		br->feature_mask &= ~NETIF_F_ALL_CSUM;

	br_features_recompute(br);
	return 0;
}

static struct ethtool_ops br_ethtool_ops = {
	.get_drvinfo = br_getinfo,
	.get_link = ethtool_op_get_link,
	.set_sg = br_set_sg,
	.set_tx_csum = br_set_tx_csum,
	.set_tso = br_set_tso,
};

void br_dev_setup(struct net_device *dev)
{
	random_ether_addr(dev->dev_addr);
	ether_setup(dev);

	dev->do_ioctl = br_dev_ioctl;
	dev->hard_start_xmit = br_dev_xmit;
	dev->open = br_dev_open;
	dev->set_multicast_list = br_dev_set_multicast_list;
	dev->change_mtu = br_change_mtu;
	dev->destructor = free_netdev;
	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
	dev->stop = br_dev_stop;
	dev->tx_queue_len = 0;
	dev->set_mac_address = br_set_mac_address;
	dev->priv_flags = IFF_EBRIDGE;

	dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
			NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX;
}
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>
4505a3ef	16	#include <linux/etherdevice.h>
edb5e46f	17	#include <linux/ethtool.h>
4505a3ef	18
1da177e4 LT	19	#include <asm/uaccess.h>
	20	#include "br_private.h"
	21
f8ae737d	22	/* net device transmit always called with no BH (preempt_disabled) */
1da177e4 LT	23	int br_dev_xmit(struct sk_buff skb, struct net_device dev)
	24	{
	25	struct net_bridge *br = netdev_priv(dev);
	26	const unsigned char *dest = skb->data;
	27	struct net_bridge_fdb_entry *dst;
	28
a339f1c8 PE	29	dev->stats.tx_packets++;
a339f1c8 PE	30	dev->stats.tx_bytes += skb->len;
1da177e4	31
459a98ed	32	skb_reset_mac_header(skb);
1da177e4 LT	33	skb_pull(skb, ETH_HLEN);
1da177e4 LT	34
9d6f229f	35	if (dest[0] & 1)
e081e1e3	36	br_flood_deliver(br, skb);
1da177e4 LT	37	else if ((dst = __br_fdb_get(br, dest)) != NULL)
	38	br_deliver(dst->dst, skb);
	39	else
e081e1e3	40	br_flood_deliver(br, skb);
1da177e4	41
1da177e4 LT	42	return 0;
	43	}
	44
	45	static int br_dev_open(struct net_device *dev)
	46	{
81d35307	47	struct net_bridge *br = netdev_priv(dev);
1da177e4	48
81d35307 SH	49	br_features_recompute(br);
	50	netif_start_queue(dev);
	51	br_stp_enable_bridge(br);
1da177e4 LT	52
	53	return 0;
	54	}
	55
	56	static void br_dev_set_multicast_list(struct net_device *dev)
	57	{
	58	}
	59
	60	static int br_dev_stop(struct net_device *dev)
	61	{
81d35307	62	br_stp_disable_bridge(netdev_priv(dev));
1da177e4 LT	63
	64	netif_stop_queue(dev);
	65
	66	return 0;
	67	}
	68
	69	static int br_change_mtu(struct net_device *dev, int new_mtu)
	70	{
81d35307	71	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(netdev_priv(dev)))
1da177e4 LT	72	return -EINVAL;
	73
	74	dev->mtu = new_mtu;
	75	return 0;
	76	}
	77
ffe1d49c	78	/* Allow setting mac address to any valid ethernet address. */
4505a3ef SH	79	static int br_set_mac_address(struct net_device dev, void p)
	80	{
	81	struct net_bridge *br = netdev_priv(dev);
	82	struct sockaddr *addr = p;
ffe1d49c SH	83
	84	if (!is_valid_ether_addr(addr->sa_data))
	85	return -EINVAL;
4505a3ef SH	86
4505a3ef SH	87	spin_lock_bh(&br->lock);
ffe1d49c SH	88	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
ffe1d49c SH	89	br_stp_change_bridge_id(br, addr->sa_data);
92c0574f	90	br->flags \|= BR_SET_MAC_ADDR;
4505a3ef SH	91	spin_unlock_bh(&br->lock);
4505a3ef SH	92
ffe1d49c	93	return 0;
4505a3ef SH	94	}
4505a3ef SH	95
edb5e46f SH	96	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
	97	{
	98	strcpy(info->driver, "bridge");
	99	strcpy(info->version, BR_VERSION);
	100	strcpy(info->fw_version, "N/A");
	101	strcpy(info->bus_info, "N/A");
	102	}
	103
	104	static int br_set_sg(struct net_device *dev, u32 data)
	105	{
	106	struct net_bridge *br = netdev_priv(dev);
	107
	108	if (data)
	109	br->feature_mask \|= NETIF_F_SG;
	110	else
	111	br->feature_mask &= ~NETIF_F_SG;
	112
	113	br_features_recompute(br);
	114	return 0;
	115	}
	116
	117	static int br_set_tso(struct net_device *dev, u32 data)
	118	{
	119	struct net_bridge *br = netdev_priv(dev);
	120
	121	if (data)
	122	br->feature_mask \|= NETIF_F_TSO;
	123	else
	124	br->feature_mask &= ~NETIF_F_TSO;
	125
	126	br_features_recompute(br);
	127	return 0;
	128	}
	129
	130	static int br_set_tx_csum(struct net_device *dev, u32 data)
	131	{
	132	struct net_bridge *br = netdev_priv(dev);
	133
	134	if (data)
2c6cc0d8	135	br->feature_mask \|= NETIF_F_NO_CSUM;
edb5e46f	136	else
2c6cc0d8	137	br->feature_mask &= ~NETIF_F_ALL_CSUM;
edb5e46f SH	138
	139	br_features_recompute(br);
	140	return 0;
	141	}
	142
	143	static struct ethtool_ops br_ethtool_ops = {
	144	.get_drvinfo = br_getinfo,
	145	.get_link = ethtool_op_get_link,
edb5e46f	146	.set_sg = br_set_sg,
edb5e46f	147	.set_tx_csum = br_set_tx_csum,
edb5e46f SH	148	.set_tso = br_set_tso,
	149	};
	150
1da177e4 LT	151	void br_dev_setup(struct net_device *dev)
1da177e4 LT	152	{
3ae41254	153	random_ether_addr(dev->dev_addr);
1da177e4 LT	154	ether_setup(dev);
	155
	156	dev->do_ioctl = br_dev_ioctl;
1da177e4 LT	157	dev->hard_start_xmit = br_dev_xmit;
	158	dev->open = br_dev_open;
	159	dev->set_multicast_list = br_dev_set_multicast_list;
	160	dev->change_mtu = br_change_mtu;
	161	dev->destructor = free_netdev;
9d6f229f	162	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
1da177e4 LT	163	dev->stop = br_dev_stop;
1da177e4 LT	164	dev->tx_queue_len = 0;
4505a3ef	165	dev->set_mac_address = br_set_mac_address;
1da177e4	166	dev->priv_flags = IFF_EBRIDGE;
edb5e46f	167
9d6f229f	168	dev->features = NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA \|
7f353bf2	169	NETIF_F_GSO_MASK \| NETIF_F_NO_CSUM \| NETIF_F_LLTX;
1da177e4	170	}