path: root/net/core/ethtool.c

/*
 * net/core/ethtool.c - Ethtool ioctl handler
 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
 *
 * This file is where we call all the ethtool_ops commands to get
 * the information ethtool needs.
 *
 * 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/module.h>
#include <linux/types.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <asm/uaccess.h>

/*
 * Some useful ethtool_ops methods that're device independent.
 * If we find that all drivers want to do the same thing here,
 * we can turn these into dev_() function calls.
 */

u32 ethtool_op_get_link(struct net_device *dev)
{
	return netif_carrier_ok(dev) ? 1 : 0;
}

u32 ethtool_op_get_rx_csum(struct net_device *dev)
{
	return (dev->features & NETIF_F_ALL_CSUM) != 0;
}
EXPORT_SYMBOL(ethtool_op_get_rx_csum);

u32 ethtool_op_get_tx_csum(struct net_device *dev)
{
	return (dev->features & NETIF_F_ALL_CSUM) != 0;
}
EXPORT_SYMBOL(ethtool_op_get_tx_csum);

int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_IP_CSUM;
	else
		dev->features &= ~NETIF_F_IP_CSUM;

	return 0;
}

int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_HW_CSUM;
	else
		dev->features &= ~NETIF_F_HW_CSUM;

	return 0;
}

int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
	else
		dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);

	return 0;
}

u32 ethtool_op_get_sg(struct net_device *dev)
{
	return (dev->features & NETIF_F_SG) != 0;
}

int ethtool_op_set_sg(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_SG;
	else
		dev->features &= ~NETIF_F_SG;

	return 0;
}

u32 ethtool_op_get_tso(struct net_device *dev)
{
	return (dev->features & NETIF_F_TSO) != 0;
}

int ethtool_op_set_tso(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_TSO;
	else
		dev->features &= ~NETIF_F_TSO;

	return 0;
}

u32 ethtool_op_get_ufo(struct net_device *dev)
{
	return (dev->features & NETIF_F_UFO) != 0;
}

int ethtool_op_set_ufo(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_UFO;
	else
		dev->features &= ~NETIF_F_UFO;
	return 0;
}

/* the following list of flags are the same as their associated
 * NETIF_F_xxx values in include/linux/netdevice.h
 */
static const u32 flags_dup_features =
	ETH_FLAG_LRO;

u32 ethtool_op_get_flags(struct net_device *dev)
{
	/* in the future, this function will probably contain additional
	 * handling for flags which are not so easily handled
	 * by a simple masking operation
	 */

	return dev->features & flags_dup_features;
}

int ethtool_op_set_flags(struct net_device *dev, u32 data)
{
	if (data & ETH_FLAG_LRO)
		dev->features |= NETIF_F_LRO;
	else
		dev->features &= ~NETIF_F_LRO;

	return 0;
}

/* Handlers for each ethtool command */

static int