[linux.git] / net / bridge / br_device.c

/*
 *	Device handling code
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<[email protected]>
 *
 *	$Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $
 *
 *	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"

static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	return &br->statistics;
}

/* 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;

	br->statistics.tx_packets++;
	br->statistics.tx_bytes += skb->len;

	skb->mac.raw = skb->data;
	skb_pull(skb, ETH_HLEN);

	if (dest[0] & 1) 
		br_flood_deliver(br, skb, 0);
	else if ((dst = __br_fdb_get(br, dest)) != NULL)
		br_deliver(dst->dst, skb);
	else
		br_flood_deliver(br, skb, 0);

	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 of pseudo-bridge to be same as
 * any of the bound interfaces
 */
static int br_set_mac_address(struct net_device *dev, void *p)
{
	struct net_bridge *br = netdev_priv(dev);
	struct sockaddr *addr = p;
	struct net_bridge_port *port;
	int err = -EADDRNOTAVAIL;

	spin_lock_bh(&br->lock);
	list_for_each_entry(port, &br->port_list, list) {
		if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
			br_stp_change_bridge_id(br, addr->sa_data);
			err = 0;
			break;
		}
	}
	spin_unlock_bh(&br->lock);

	return err;
}

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,
	.get_sg = ethtool_op_get_sg,
	.set_sg = br_set_sg,
	.get_tx_csum = ethtool_op_get_tx_csum,
	.set_tx_csum = br_set_tx_csum,
	.get_tso = ethtool_op_get_tso,
	.set_tso = br_set_tso,
};

void br_dev_setup(struct net_device *dev)
{
	memset(dev->dev_addr, 0, ETH_ALEN);

	ether_setup(dev);

	dev->do_ioctl = br_dev_ioctl;
	dev->get_stats = br_dev_get_stats;
	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_MODULE_OWNER(dev);
 	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_TSO | NETIF_F_NO_CSUM | NETIF_F_GSO_ROBUST;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Device handling code
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <[email protected]>
	7	*
	8	* $Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* as published by the Free Software Foundation; either version
	13	* 2 of the License, or (at your option) any later version.
	14	*/
	15
	16	#include <linux/kernel.h>
	17	#include <linux/netdevice.h>
4505a3ef	18	#include <linux/etherdevice.h>
edb5e46f	19	#include <linux/ethtool.h>
4505a3ef	20
1da177e4 LT	21	#include <asm/uaccess.h>
	22	#include "br_private.h"
	23
	24	static struct net_device_stats br_dev_get_stats(struct net_device dev)
	25	{
81d35307	26	struct net_bridge *br = netdev_priv(dev);
1da177e4 LT	27	return &br->statistics;
	28	}
	29
f8ae737d	30	/* net device transmit always called with no BH (preempt_disabled) */
1da177e4 LT	31	int br_dev_xmit(struct sk_buff skb, struct net_device dev)
	32	{
	33	struct net_bridge *br = netdev_priv(dev);
	34	const unsigned char *dest = skb->data;
	35	struct net_bridge_fdb_entry *dst;
	36
	37	br->statistics.tx_packets++;
	38	br->statistics.tx_bytes += skb->len;
	39
	40	skb->mac.raw = skb->data;
	41	skb_pull(skb, ETH_HLEN);
	42
1da177e4 LT	43	if (dest[0] & 1)
	44	br_flood_deliver(br, skb, 0);
	45	else if ((dst = __br_fdb_get(br, dest)) != NULL)
	46	br_deliver(dst->dst, skb);
	47	else
	48	br_flood_deliver(br, skb, 0);
	49
1da177e4 LT	50	return 0;
	51	}
	52
	53	static int br_dev_open(struct net_device *dev)
	54	{
81d35307	55	struct net_bridge *br = netdev_priv(dev);
1da177e4	56
81d35307 SH	57	br_features_recompute(br);
	58	netif_start_queue(dev);
	59	br_stp_enable_bridge(br);
1da177e4 LT	60
	61	return 0;
	62	}
	63
	64	static void br_dev_set_multicast_list(struct net_device *dev)
	65	{
	66	}
	67
	68	static int br_dev_stop(struct net_device *dev)
	69	{
81d35307	70	br_stp_disable_bridge(netdev_priv(dev));
1da177e4 LT	71
	72	netif_stop_queue(dev);
	73
	74	return 0;
	75	}
	76
	77	static int br_change_mtu(struct net_device *dev, int new_mtu)
	78	{
81d35307	79	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(netdev_priv(dev)))
1da177e4 LT	80	return -EINVAL;
	81
	82	dev->mtu = new_mtu;
	83	return 0;
	84	}
	85
4505a3ef SH	86	/* Allow setting mac address of pseudo-bridge to be same as
	87	* any of the bound interfaces
	88	*/
	89	static int br_set_mac_address(struct net_device dev, void p)
	90	{
	91	struct net_bridge *br = netdev_priv(dev);
	92	struct sockaddr *addr = p;
	93	struct net_bridge_port *port;
	94	int err = -EADDRNOTAVAIL;
	95
	96	spin_lock_bh(&br->lock);
	97	list_for_each_entry(port, &br->port_list, list) {
	98	if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
	99	br_stp_change_bridge_id(br, addr->sa_data);
	100	err = 0;
	101	break;
	102	}
	103	}
	104	spin_unlock_bh(&br->lock);
	105
	106	return err;
	107	}
	108
edb5e46f SH	109	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
	110	{
	111	strcpy(info->driver, "bridge");
	112	strcpy(info->version, BR_VERSION);
	113	strcpy(info->fw_version, "N/A");
	114	strcpy(info->bus_info, "N/A");
	115	}
	116
	117	static int br_set_sg(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_SG;
	123	else
	124	br->feature_mask &= ~NETIF_F_SG;
	125
	126	br_features_recompute(br);
	127	return 0;
	128	}
	129
	130	static int br_set_tso(struct net_device *dev, u32 data)
	131	{
	132	struct net_bridge *br = netdev_priv(dev);
	133
	134	if (data)
	135	br->feature_mask \|= NETIF_F_TSO;
	136	else
	137	br->feature_mask &= ~NETIF_F_TSO;
	138
	139	br_features_recompute(br);
	140	return 0;
	141	}
	142
	143	static int br_set_tx_csum(struct net_device *dev, u32 data)
	144	{
	145	struct net_bridge *br = netdev_priv(dev);
	146
	147	if (data)
2c6cc0d8	148	br->feature_mask \|= NETIF_F_NO_CSUM;
edb5e46f	149	else
2c6cc0d8	150	br->feature_mask &= ~NETIF_F_ALL_CSUM;
edb5e46f SH	151
	152	br_features_recompute(br);
	153	return 0;
	154	}
	155
	156	static struct ethtool_ops br_ethtool_ops = {
	157	.get_drvinfo = br_getinfo,
	158	.get_link = ethtool_op_get_link,
	159	.get_sg = ethtool_op_get_sg,
	160	.set_sg = br_set_sg,
	161	.get_tx_csum = ethtool_op_get_tx_csum,
	162	.set_tx_csum = br_set_tx_csum,
	163	.get_tso = ethtool_op_get_tso,
	164	.set_tso = br_set_tso,
	165	};
	166
1da177e4 LT	167	void br_dev_setup(struct net_device *dev)
	168	{
	169	memset(dev->dev_addr, 0, ETH_ALEN);
	170
	171	ether_setup(dev);
	172
	173	dev->do_ioctl = br_dev_ioctl;
	174	dev->get_stats = br_dev_get_stats;
	175	dev->hard_start_xmit = br_dev_xmit;
	176	dev->open = br_dev_open;
	177	dev->set_multicast_list = br_dev_set_multicast_list;
	178	dev->change_mtu = br_change_mtu;
	179	dev->destructor = free_netdev;
	180	SET_MODULE_OWNER(dev);
edb5e46f	181	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
1da177e4 LT	182	dev->stop = br_dev_stop;
1da177e4 LT	183	dev->tx_queue_len = 0;
4505a3ef	184	dev->set_mac_address = br_set_mac_address;
1da177e4	185	dev->priv_flags = IFF_EBRIDGE;
edb5e46f	186
576a30eb HX	187	dev->features = NETIF_F_SG \| NETIF_F_FRAGLIST \| NETIF_F_HIGHDMA \|
576a30eb HX	188	NETIF_F_TSO \| NETIF_F_NO_CSUM \| NETIF_F_GSO_ROBUST;
1da177e4	189	}