[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bridge / br_device.c

/*
 *	Device handling code
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	$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;
}

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);

	rcu_read_lock();
	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);

	rcu_read_unlock();
	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_IP_CSUM;
	else
		br->feature_mask &= ~NETIF_F_IP_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_IP_CSUM;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Device handling code
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <buytenh@gnu.org>
	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
	30	int br_dev_xmit(struct sk_buff skb, struct net_device dev)
	31	{
	32	struct net_bridge *br = netdev_priv(dev);
	33	const unsigned char *dest = skb->data;
	34	struct net_bridge_fdb_entry *dst;
	35
	36	br->statistics.tx_packets++;
	37	br->statistics.tx_bytes += skb->len;
	38
	39	skb->mac.raw = skb->data;
	40	skb_pull(skb, ETH_HLEN);
	41
	42	rcu_read_lock();
	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
	50	rcu_read_unlock();
	51	return 0;
	52	}
	53
	54	static int br_dev_open(struct net_device *dev)
	55	{
81d35307	56	struct net_bridge *br = netdev_priv(dev);
1da177e4	57
81d35307 SH	58	br_features_recompute(br);
	59	netif_start_queue(dev);
	60	br_stp_enable_bridge(br);
1da177e4 LT	61
	62	return 0;
	63	}
	64
	65	static void br_dev_set_multicast_list(struct net_device *dev)
	66	{
	67	}
	68
	69	static int br_dev_stop(struct net_device *dev)
	70	{
81d35307	71	br_stp_disable_bridge(netdev_priv(dev));
1da177e4 LT	72
	73	netif_stop_queue(dev);
	74
	75	return 0;
	76	}
	77
	78	static int br_change_mtu(struct net_device *dev, int new_mtu)
	79	{
81d35307	80	if (new_mtu < 68 \|\| new_mtu > br_min_mtu(netdev_priv(dev)))
1da177e4 LT	81	return -EINVAL;
	82
	83	dev->mtu = new_mtu;
	84	return 0;
	85	}
	86
4505a3ef SH	87	/* Allow setting mac address of pseudo-bridge to be same as
	88	* any of the bound interfaces
	89	*/
	90	static int br_set_mac_address(struct net_device dev, void p)
	91	{
	92	struct net_bridge *br = netdev_priv(dev);
	93	struct sockaddr *addr = p;
	94	struct net_bridge_port *port;
	95	int err = -EADDRNOTAVAIL;
	96
	97	spin_lock_bh(&br->lock);
	98	list_for_each_entry(port, &br->port_list, list) {
	99	if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
	100	br_stp_change_bridge_id(br, addr->sa_data);
	101	err = 0;
	102	break;
	103	}
	104	}
	105	spin_unlock_bh(&br->lock);
	106
	107	return err;
	108	}
	109
edb5e46f SH	110	static void br_getinfo(struct net_device dev, struct ethtool_drvinfo info)
	111	{
	112	strcpy(info->driver, "bridge");
	113	strcpy(info->version, BR_VERSION);
	114	strcpy(info->fw_version, "N/A");
	115	strcpy(info->bus_info, "N/A");
	116	}
	117
	118	static int br_set_sg(struct net_device *dev, u32 data)
	119	{
	120	struct net_bridge *br = netdev_priv(dev);
	121
	122	if (data)
	123	br->feature_mask \|= NETIF_F_SG;
	124	else
	125	br->feature_mask &= ~NETIF_F_SG;
	126
	127	br_features_recompute(br);
	128	return 0;
	129	}
	130
	131	static int br_set_tso(struct net_device *dev, u32 data)
	132	{
	133	struct net_bridge *br = netdev_priv(dev);
	134
	135	if (data)
	136	br->feature_mask \|= NETIF_F_TSO;
	137	else
	138	br->feature_mask &= ~NETIF_F_TSO;
	139
	140	br_features_recompute(br);
	141	return 0;
	142	}
	143
	144	static int br_set_tx_csum(struct net_device *dev, u32 data)
	145	{
	146	struct net_bridge *br = netdev_priv(dev);
	147
	148	if (data)
	149	br->feature_mask \|= NETIF_F_IP_CSUM;
	150	else
	151	br->feature_mask &= ~NETIF_F_IP_CSUM;
	152
	153	br_features_recompute(br);
	154	return 0;
	155	}
	156
	157	static struct ethtool_ops br_ethtool_ops = {
	158	.get_drvinfo = br_getinfo,
	159	.get_link = ethtool_op_get_link,
	160	.get_sg = ethtool_op_get_sg,
	161	.set_sg = br_set_sg,
	162	.get_tx_csum = ethtool_op_get_tx_csum,
	163	.set_tx_csum = br_set_tx_csum,
	164	.get_tso = ethtool_op_get_tso,
	165	.set_tso = br_set_tso,
	166	};
	167
1da177e4 LT	168	void br_dev_setup(struct net_device *dev)
	169	{
	170	memset(dev->dev_addr, 0, ETH_ALEN);
	171
	172	ether_setup(dev);
	173
	174	dev->do_ioctl = br_dev_ioctl;
	175	dev->get_stats = br_dev_get_stats;
	176	dev->hard_start_xmit = br_dev_xmit;
	177	dev->open = br_dev_open;
	178	dev->set_multicast_list = br_dev_set_multicast_list;
	179	dev->change_mtu = br_change_mtu;
	180	dev->destructor = free_netdev;
	181	SET_MODULE_OWNER(dev);
edb5e46f	182	SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
1da177e4 LT	183	dev->stop = br_dev_stop;
1da177e4 LT	184	dev->tx_queue_len = 0;
4505a3ef	185	dev->set_mac_address = br_set_mac_address;
1da177e4	186	dev->priv_flags = IFF_EBRIDGE;
edb5e46f SH	187
	188	dev->features = NETIF_F_SG \| NETIF_F_FRAGLIST
	189	\| NETIF_F_HIGHDMA \| NETIF_F_TSO \| NETIF_F_IP_CSUM;
1da177e4	190	}