ethtool.c 40.3 KB
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/*
 * 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
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 * the information ethtool needs.
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 *
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 * 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.
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 */

#include <linux/module.h>
#include <linux/types.h>
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#include <linux/capability.h>
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#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
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#include <linux/bitops.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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/*
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 * 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;
}
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EXPORT_SYMBOL(ethtool_op_get_link);
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u32 ethtool_op_get_rx_csum(struct net_device *dev)
{
	return (dev->features & NETIF_F_ALL_CSUM) != 0;
}
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EXPORT_SYMBOL(ethtool_op_get_rx_csum);
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u32 ethtool_op_get_tx_csum(struct net_device *dev)
{
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	return (dev->features & NETIF_F_ALL_CSUM) != 0;
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}
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EXPORT_SYMBOL(ethtool_op_get_tx_csum);
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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;
}

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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;
}
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EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
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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;
}
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EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
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u32 ethtool_op_get_sg(struct net_device *dev)
{
	return (dev->features & NETIF_F_SG) != 0;
}
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EXPORT_SYMBOL(ethtool_op_get_sg);
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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;
}
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EXPORT_SYMBOL(ethtool_op_set_sg);
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u32 ethtool_op_get_tso(struct net_device *dev)
{
	return (dev->features & NETIF_F_TSO) != 0;
}
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EXPORT_SYMBOL(ethtool_op_get_tso);
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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;
}
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EXPORT_SYMBOL(ethtool_op_set_tso);
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u32 ethtool_op_get_ufo(struct net_device *dev)
{
	return (dev->features & NETIF_F_UFO) != 0;
}
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EXPORT_SYMBOL(ethtool_op_get_ufo);
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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;
}
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EXPORT_SYMBOL(ethtool_op_set_ufo);
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/* 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 =
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	(ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
	 ETH_FLAG_RXHASH);
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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;
}
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EXPORT_SYMBOL(ethtool_op_get_flags);
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int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
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{
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	if (data & ~supported)
		return -EINVAL;
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	dev->features = ((dev->features & ~flags_dup_features) |
			 (data & flags_dup_features));
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	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_flags);
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void ethtool_ntuple_flush(struct net_device *dev)
{
	struct ethtool_rx_ntuple_flow_spec_container *fsc, *f;

	list_for_each_entry_safe(fsc, f, &dev->ethtool_ntuple_list.list, list) {
		list_del(&fsc->list);
		kfree(fsc);
	}
	dev->ethtool_ntuple_list.count = 0;
}
EXPORT_SYMBOL(ethtool_ntuple_flush);

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/* Handlers for each ethtool command */

static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
{
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	struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
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	int err;

	if (!dev->ethtool_ops->get_settings)
		return -EOPNOTSUPP;

	err = dev->ethtool_ops->get_settings(dev, &cmd);
	if (err < 0)
		return err;

	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
		return -EFAULT;
	return 0;
}

static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_cmd cmd;

	if (!dev->ethtool_ops->set_settings)
		return -EOPNOTSUPP;

	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
		return -EFAULT;

	return dev->ethtool_ops->set_settings(dev, &cmd);
}

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static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
						  void __user *useraddr)
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{
	struct ethtool_drvinfo info;
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	const struct ethtool_ops *ops = dev->ethtool_ops;
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	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GDRVINFO;
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	if (ops && ops->get_drvinfo) {
		ops->get_drvinfo(dev, &info);
	} else if (dev->dev.parent && dev->dev.parent->driver) {
		strlcpy(info.bus_info, dev_name(dev->dev.parent),
			sizeof(info.bus_info));
		strlcpy(info.driver, dev->dev.parent->driver->name,
			sizeof(info.driver));
	} else {
		return -EOPNOTSUPP;
	}
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	/*
	 * this method of obtaining string set info is deprecated;
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	 * Use ETHTOOL_GSSET_INFO instead.
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	 */
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	if (ops && ops->get_sset_count) {
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		int rc;

		rc = ops->get_sset_count(dev, ETH_SS_TEST);
		if (rc >= 0)
			info.testinfo_len = rc;
		rc = ops->get_sset_count(dev, ETH_SS_STATS);
		if (rc >= 0)
			info.n_stats = rc;
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		rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
		if (rc >= 0)
			info.n_priv_flags = rc;
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	}
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	if (ops && ops->get_regs_len)
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		info.regdump_len = ops->get_regs_len(dev);
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	if (ops && ops->get_eeprom_len)
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		info.eedump_len = ops->get_eeprom_len(dev);

	if (copy_to_user(useraddr, &info, sizeof(info)))
		return -EFAULT;
	return 0;
}

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static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
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						    void __user *useraddr)
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{
	struct ethtool_sset_info info;
	const struct ethtool_ops *ops = dev->ethtool_ops;
	u64 sset_mask;
	int i, idx = 0, n_bits = 0, ret, rc;
	u32 *info_buf = NULL;

	if (!ops->get_sset_count)
		return -EOPNOTSUPP;

	if (copy_from_user(&info, useraddr, sizeof(info)))
		return -EFAULT;

	/* store copy of mask, because we zero struct later on */
	sset_mask = info.sset_mask;
	if (!sset_mask)
		return 0;

	/* calculate size of return buffer */
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	n_bits = hweight64(sset_mask);
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	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GSSET_INFO;

	info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
	if (!info_buf)
		return -ENOMEM;

	/*
	 * fill return buffer based on input bitmask and successful
	 * get_sset_count return
	 */
	for (i = 0; i < 64; i++) {
		if (!(sset_mask & (1ULL << i)))
			continue;

		rc = ops->get_sset_count(dev, i);
		if (rc >= 0) {
			info.sset_mask |= (1ULL << i);
			info_buf[idx++] = rc;
		}
	}

	ret = -EFAULT;
	if (copy_to_user(useraddr, &info, sizeof(info)))
		goto out;

	useraddr += offsetof(struct ethtool_sset_info, data);
	if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
		goto out;

	ret = 0;

out:
	kfree(info_buf);
	return ret;
}

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static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
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						u32 cmd, void __user *useraddr)
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{
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	struct ethtool_rxnfc info;
	size_t info_size = sizeof(info);
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	if (!dev->ethtool_ops->set_rxnfc)
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		return -EOPNOTSUPP;

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	/* struct ethtool_rxnfc was originally defined for
	 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
	 * members.  User-space might still be using that
	 * definition. */
	if (cmd == ETHTOOL_SRXFH)
		info_size = (offsetof(struct ethtool_rxnfc, data) +
			     sizeof(info.data));

	if (copy_from_user(&info, useraddr, info_size))
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		return -EFAULT;

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	return dev->ethtool_ops->set_rxnfc(dev, &info);
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}

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static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
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						u32 cmd, void __user *useraddr)
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{
	struct ethtool_rxnfc info;
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	size_t info_size = sizeof(info);
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	const struct ethtool_ops *ops = dev->ethtool_ops;
	int ret;
	void *rule_buf = NULL;
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	if (!ops->get_rxnfc)
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		return -EOPNOTSUPP;

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	/* struct ethtool_rxnfc was originally defined for
	 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
	 * members.  User-space might still be using that
	 * definition. */
	if (cmd == ETHTOOL_GRXFH)
		info_size = (offsetof(struct ethtool_rxnfc, data) +
			     sizeof(info.data));

	if (copy_from_user(&info, useraddr, info_size))
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		return -EFAULT;

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	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
		if (info.rule_cnt > 0) {
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			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
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				rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
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						   GFP_USER);
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			if (!rule_buf)
				return -ENOMEM;
		}
	}
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	ret = ops->get_rxnfc(dev, &info, rule_buf);
	if (ret < 0)
		goto err_out;

	ret = -EFAULT;
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	if (copy_to_user(useraddr, &info, info_size))
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		goto err_out;

	if (rule_buf) {
		useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
		if (copy_to_user(useraddr, rule_buf,
				 info.rule_cnt * sizeof(u32)))
			goto err_out;
	}
	ret = 0;

err_out:
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	kfree(rule_buf);
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	return ret;
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}

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static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
	struct ethtool_rxfh_indir *indir;
	u32 table_size;
	size_t full_size;
	int ret;

	if (!dev->ethtool_ops->get_rxfh_indir)
		return -EOPNOTSUPP;

	if (copy_from_user(&table_size,
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
			   sizeof(table_size)))
		return -EFAULT;

	if (table_size >
	    (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
		return -ENOMEM;
	full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
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	indir = kzalloc(full_size, GFP_USER);
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	if (!indir)
		return -ENOMEM;

	indir->cmd = ETHTOOL_GRXFHINDIR;
	indir->size = table_size;
	ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
	if (ret)
		goto out;

	if (copy_to_user(useraddr, indir, full_size))
		ret = -EFAULT;

out:
	kfree(indir);
	return ret;
}

static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
	struct ethtool_rxfh_indir *indir;
	u32 table_size;
	size_t full_size;
	int ret;

	if (!dev->ethtool_ops->set_rxfh_indir)
		return -EOPNOTSUPP;

	if (copy_from_user(&table_size,
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
			   sizeof(table_size)))
		return -EFAULT;

	if (table_size >
	    (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
		return -ENOMEM;
	full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
	indir = kmalloc(full_size, GFP_USER);
	if (!indir)
		return -ENOMEM;

	if (copy_from_user(indir, useraddr, full_size)) {
		ret = -EFAULT;
		goto out;
	}

	ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);

out:
	kfree(indir);
	return ret;
}

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static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
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			struct ethtool_rx_ntuple_flow_spec *spec,
			struct ethtool_rx_ntuple_flow_spec_container *fsc)
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{

	/* don't add filters forever */
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	if (list->count >= ETHTOOL_MAX_NTUPLE_LIST_ENTRY) {
		/* free the container */
		kfree(fsc);
		return;
	}
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	/* Copy the whole filter over */
	fsc->fs.flow_type = spec->flow_type;
	memcpy(&fsc->fs.h_u, &spec->h_u, sizeof(spec->h_u));
	memcpy(&fsc->fs.m_u, &spec->m_u, sizeof(spec->m_u));

	fsc->fs.vlan_tag = spec->vlan_tag;
	fsc->fs.vlan_tag_mask = spec->vlan_tag_mask;
	fsc->fs.data = spec->data;
	fsc->fs.data_mask = spec->data_mask;
	fsc->fs.action = spec->action;

	/* add to the list */
	list_add_tail_rcu(&fsc->list, &list->list);
	list->count++;
}

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/*
 * ethtool does not (or did not) set masks for flow parameters that are
 * not specified, so if both value and mask are 0 then this must be
 * treated as equivalent to a mask with all bits set.  Implement that
 * here rather than in drivers.
 */
static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
{
	struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
	struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;

	if (fs->flow_type != TCP_V4_FLOW &&
	    fs->flow_type != UDP_V4_FLOW &&
	    fs->flow_type != SCTP_V4_FLOW)
		return;

	if (!(entry->ip4src | mask->ip4src))
		mask->ip4src = htonl(0xffffffff);
	if (!(entry->ip4dst | mask->ip4dst))
		mask->ip4dst = htonl(0xffffffff);
	if (!(entry->psrc | mask->psrc))
		mask->psrc = htons(0xffff);
	if (!(entry->pdst | mask->pdst))
		mask->pdst = htons(0xffff);
	if (!(entry->tos | mask->tos))
		mask->tos = 0xff;
	if (!(fs->vlan_tag | fs->vlan_tag_mask))
		fs->vlan_tag_mask = 0xffff;
	if (!(fs->data | fs->data_mask))
		fs->data_mask = 0xffffffffffffffffULL;
}

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static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
						    void __user *useraddr)
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{
	struct ethtool_rx_ntuple cmd;
	const struct ethtool_ops *ops = dev->ethtool_ops;
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	struct ethtool_rx_ntuple_flow_spec_container *fsc = NULL;
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	int ret;

	if (!(dev->features & NETIF_F_NTUPLE))
		return -EINVAL;

	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
		return -EFAULT;

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	rx_ntuple_fix_masks(&cmd.fs);

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	/*
	 * Cache filter in dev struct for GET operation only if
	 * the underlying driver doesn't have its own GET operation, and
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	 * only if the filter was added successfully.  First make sure we
	 * can allocate the filter, then continue if successful.
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	 */
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	if (!ops->get_rx_ntuple) {
		fsc = kmalloc(sizeof(*fsc), GFP_ATOMIC);
		if (!fsc)
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			return -ENOMEM;
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	}

	ret = ops->set_rx_ntuple(dev, &cmd);
	if (ret) {
		kfree(fsc);
		return ret;
	}

	if (!ops->get_rx_ntuple)
		__rx_ntuple_filter_add(&dev->ethtool_ntuple_list, &cmd.fs, fsc);
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	return ret;
}

static int ethtool_get_rx_ntuple(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_gstrings gstrings;
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct ethtool_rx_ntuple_flow_spec_container *fsc;
	u8 *data;
	char *p;
	int ret, i, num_strings = 0;

	if (!ops->get_sset_count)
		return -EOPNOTSUPP;

	if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
		return -EFAULT;

	ret = ops->get_sset_count(dev, gstrings.string_set);
	if (ret < 0)
		return ret;

	gstrings.len = ret;

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	data = kzalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
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	if (!data)
		return -ENOMEM;

	if (ops->get_rx_ntuple) {
		/* driver-specific filter grab */
		ret = ops->get_rx_ntuple(dev, gstrings.string_set, data);
		goto copy;
	}

	/* default ethtool filter grab */
	i = 0;
	p = (char *)data;
	list_for_each_entry(fsc, &dev->ethtool_ntuple_list.list, list) {
		sprintf(p, "Filter %d:\n", i);
		p += ETH_GSTRING_LEN;
		num_strings++;

		switch (fsc->fs.flow_type) {
		case TCP_V4_FLOW:
			sprintf(p, "\tFlow Type: TCP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case UDP_V4_FLOW:
			sprintf(p, "\tFlow Type: UDP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case SCTP_V4_FLOW:
			sprintf(p, "\tFlow Type: SCTP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case AH_ESP_V4_FLOW:
			sprintf(p, "\tFlow Type: AH ESP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case ESP_V4_FLOW:
			sprintf(p, "\tFlow Type: ESP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IP_USER_FLOW:
			sprintf(p, "\tFlow Type: Raw IP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IPV4_FLOW:
			sprintf(p, "\tFlow Type: IPv4\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		default:
			sprintf(p, "\tFlow Type: Unknown\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			goto unknown_filter;
642
		}
643 644 645 646 647 648 649

		/* now the rest of the filters */
		switch (fsc->fs.flow_type) {
		case TCP_V4_FLOW:
		case UDP_V4_FLOW:
		case SCTP_V4_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
650
				fsc->fs.h_u.tcp_ip4_spec.ip4src);
651 652 653
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
654
				fsc->fs.m_u.tcp_ip4_spec.ip4src);
655 656 657
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
658
				fsc->fs.h_u.tcp_ip4_spec.ip4dst);
659 660 661
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
662
				fsc->fs.m_u.tcp_ip4_spec.ip4dst);
663 664 665
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc Port: %d, mask: 0x%x\n",
666 667
				fsc->fs.h_u.tcp_ip4_spec.psrc,
				fsc->fs.m_u.tcp_ip4_spec.psrc);
668 669 670
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest Port: %d, mask: 0x%x\n",
671 672
				fsc->fs.h_u.tcp_ip4_spec.pdst,
				fsc->fs.m_u.tcp_ip4_spec.pdst);
673 674 675
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tTOS: %d, mask: 0x%x\n",
676 677
				fsc->fs.h_u.tcp_ip4_spec.tos,
				fsc->fs.m_u.tcp_ip4_spec.tos);
678 679 680 681 682 683
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case AH_ESP_V4_FLOW:
		case ESP_V4_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
684
				fsc->fs.h_u.ah_ip4_spec.ip4src);
685 686 687
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
688
				fsc->fs.m_u.ah_ip4_spec.ip4src);
689 690 691
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
692
				fsc->fs.h_u.ah_ip4_spec.ip4dst);
693 694 695
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
696
				fsc->fs.m_u.ah_ip4_spec.ip4dst);
697 698 699
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSPI: %d, mask: 0x%x\n",
700 701
				fsc->fs.h_u.ah_ip4_spec.spi,
				fsc->fs.m_u.ah_ip4_spec.spi);
702 703 704
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tTOS: %d, mask: 0x%x\n",
705 706
				fsc->fs.h_u.ah_ip4_spec.tos,
				fsc->fs.m_u.ah_ip4_spec.tos);
707 708 709 710 711
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IP_USER_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
712
				fsc->fs.h_u.usr_ip4_spec.ip4src);
713 714 715
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
716
				fsc->fs.m_u.usr_ip4_spec.ip4src);
717 718 719
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
720
				fsc->fs.h_u.usr_ip4_spec.ip4dst);
721 722 723
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
724
				fsc->fs.m_u.usr_ip4_spec.ip4dst);
725 726 727 728 729
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IPV4_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
730
				fsc->fs.h_u.usr_ip4_spec.ip4src);
731 732 733
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
734
				fsc->fs.m_u.usr_ip4_spec.ip4src);
735 736 737
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
738
				fsc->fs.h_u.usr_ip4_spec.ip4dst);
739 740 741
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
742
				fsc->fs.m_u.usr_ip4_spec.ip4dst);
743 744 745
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tL4 bytes: 0x%x, mask: 0x%x\n",
746 747
				fsc->fs.h_u.usr_ip4_spec.l4_4_bytes,
				fsc->fs.m_u.usr_ip4_spec.l4_4_bytes);
748 749 750
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tTOS: %d, mask: 0x%x\n",
751 752
				fsc->fs.h_u.usr_ip4_spec.tos,
				fsc->fs.m_u.usr_ip4_spec.tos);
753 754 755
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tIP Version: %d, mask: 0x%x\n",
756 757
				fsc->fs.h_u.usr_ip4_spec.ip_ver,
				fsc->fs.m_u.usr_ip4_spec.ip_ver);
758 759 760
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tProtocol: %d, mask: 0x%x\n",
761 762
				fsc->fs.h_u.usr_ip4_spec.proto,
				fsc->fs.m_u.usr_ip4_spec.proto);
763 764 765
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
766
		}
767
		sprintf(p, "\tVLAN: %d, mask: 0x%x\n",
768
			fsc->fs.vlan_tag, fsc->fs.vlan_tag_mask);
769 770 771 772 773 774 775 776 777 778 779 780
		p += ETH_GSTRING_LEN;
		num_strings++;
		sprintf(p, "\tUser-defined: 0x%Lx\n", fsc->fs.data);
		p += ETH_GSTRING_LEN;
		num_strings++;
		sprintf(p, "\tUser-defined mask: 0x%Lx\n", fsc->fs.data_mask);
		p += ETH_GSTRING_LEN;
		num_strings++;
		if (fsc->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP)
			sprintf(p, "\tAction: Drop\n");
		else
			sprintf(p, "\tAction: Direct to queue %d\n",
781
				fsc->fs.action);
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
		p += ETH_GSTRING_LEN;
		num_strings++;
unknown_filter:
		i++;
	}
copy:
	/* indicate to userspace how many strings we actually have */
	gstrings.len = num_strings;
	ret = -EFAULT;
	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
		goto out;
	useraddr += sizeof(gstrings);
	if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
		goto out;
	ret = 0;

out:
	kfree(data);
	return ret;
}

L
Linus Torvalds 已提交
803 804 805
static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_regs regs;
806
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
807 808 809 810 811 812 813 814 815 816 817 818 819
	void *regbuf;
	int reglen, ret;

	if (!ops->get_regs || !ops->get_regs_len)
		return -EOPNOTSUPP;

	if (copy_from_user(&regs, useraddr, sizeof(regs)))
		return -EFAULT;

	reglen = ops->get_regs_len(dev);
	if (regs.len > reglen)
		regs.len = reglen;

820
	regbuf = vmalloc(reglen);
L
Linus Torvalds 已提交
821 822 823 824 825 826 827 828 829 830 831 832 833 834
	if (!regbuf)
		return -ENOMEM;

	ops->get_regs(dev, &regs, regbuf);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &regs, sizeof(regs)))
		goto out;
	useraddr += offsetof(struct ethtool_regs, data);
	if (copy_to_user(useraddr, regbuf, regs.len))
		goto out;
	ret = 0;

 out:
835
	vfree(regbuf);
L
Linus Torvalds 已提交
836 837 838
	return ret;
}

B
Ben Hutchings 已提交
839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
static int ethtool_reset(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value reset;
	int ret;

	if (!dev->ethtool_ops->reset)
		return -EOPNOTSUPP;

	if (copy_from_user(&reset, useraddr, sizeof(reset)))
		return -EFAULT;

	ret = dev->ethtool_ops->reset(dev, &reset.data);
	if (ret)
		return ret;

	if (copy_to_user(useraddr, &reset, sizeof(reset)))
		return -EFAULT;
	return 0;
}

L
Linus Torvalds 已提交
859 860
static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
861
	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
L
Linus Torvalds 已提交
862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893

	if (!dev->ethtool_ops->get_wol)
		return -EOPNOTSUPP;

	dev->ethtool_ops->get_wol(dev, &wol);

	if (copy_to_user(useraddr, &wol, sizeof(wol)))
		return -EFAULT;
	return 0;
}

static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_wolinfo wol;

	if (!dev->ethtool_ops->set_wol)
		return -EOPNOTSUPP;

	if (copy_from_user(&wol, useraddr, sizeof(wol)))
		return -EFAULT;

	return dev->ethtool_ops->set_wol(dev, &wol);
}

static int ethtool_nway_reset(struct net_device *dev)
{
	if (!dev->ethtool_ops->nway_reset)
		return -EOPNOTSUPP;

	return dev->ethtool_ops->nway_reset(dev);
}

894 895 896 897 898 899 900 901 902 903 904 905 906 907
static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };

	if (!dev->ethtool_ops->get_link)
		return -EOPNOTSUPP;

	edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);

	if (copy_to_user(useraddr, &edata, sizeof(edata)))
		return -EFAULT;
	return 0;
}

L
Linus Torvalds 已提交
908 909 910
static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
911
	const struct ethtool_ops *ops = dev->ethtool_ops;
912 913
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
914
	u8 *data;
915
	int ret = 0;
L
Linus Torvalds 已提交
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930

	if (!ops->get_eeprom || !ops->get_eeprom_len)
		return -EOPNOTSUPP;

	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
		return -EFAULT;

	/* Check for wrap and zero */
	if (eeprom.offset + eeprom.len <= eeprom.offset)
		return -EINVAL;

	/* Check for exceeding total eeprom len */
	if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
		return -EINVAL;

931
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
932 933 934
	if (!data)
		return -ENOMEM;

935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
	bytes_remaining = eeprom.len;
	while (bytes_remaining > 0) {
		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

		ret = ops->get_eeprom(dev, &eeprom, data);
		if (ret)
			break;
		if (copy_to_user(userbuf, data, eeprom.len)) {
			ret = -EFAULT;
			break;
		}
		userbuf += eeprom.len;
		eeprom.offset += eeprom.len;
		bytes_remaining -= eeprom.len;
	}
L
Linus Torvalds 已提交
950

951 952 953 954 955
	eeprom.len = userbuf - (useraddr + sizeof(eeprom));
	eeprom.offset -= eeprom.len;
	if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
		ret = -EFAULT;

L
Linus Torvalds 已提交
956 957 958 959 960 961 962
	kfree(data);
	return ret;
}

static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
963
	const struct ethtool_ops *ops = dev->ethtool_ops;
964 965
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
966
	u8 *data;
967
	int ret = 0;
L
Linus Torvalds 已提交
968 969 970 971 972 973 974 975 976 977 978 979 980 981 982

	if (!ops->set_eeprom || !ops->get_eeprom_len)
		return -EOPNOTSUPP;

	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
		return -EFAULT;

	/* Check for wrap and zero */
	if (eeprom.offset + eeprom.len <= eeprom.offset)
		return -EINVAL;

	/* Check for exceeding total eeprom len */
	if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
		return -EINVAL;

983
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
984 985 986
	if (!data)
		return -ENOMEM;

987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
	bytes_remaining = eeprom.len;
	while (bytes_remaining > 0) {
		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

		if (copy_from_user(data, userbuf, eeprom.len)) {
			ret = -EFAULT;
			break;
		}
		ret = ops->set_eeprom(dev, &eeprom, data);
		if (ret)
			break;
		userbuf += eeprom.len;
		eeprom.offset += eeprom.len;
		bytes_remaining -= eeprom.len;
	}
L
Linus Torvalds 已提交
1002 1003 1004 1005 1006

	kfree(data);
	return ret;
}

1007 1008
static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1009
{
1010
	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
L
Linus Torvalds 已提交
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021

	if (!dev->ethtool_ops->get_coalesce)
		return -EOPNOTSUPP;

	dev->ethtool_ops->get_coalesce(dev, &coalesce);

	if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
		return -EFAULT;
	return 0;
}

1022 1023
static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1024 1025 1026
{
	struct ethtool_coalesce coalesce;

1027
	if (!dev->ethtool_ops->set_coalesce)
L
Linus Torvalds 已提交
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037
		return -EOPNOTSUPP;

	if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
		return -EFAULT;

	return dev->ethtool_ops->set_coalesce(dev, &coalesce);
}

static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
{
1038
	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
L
Linus Torvalds 已提交
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080

	if (!dev->ethtool_ops->get_ringparam)
		return -EOPNOTSUPP;

	dev->ethtool_ops->get_ringparam(dev, &ringparam);

	if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
		return -EFAULT;
	return 0;
}

static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_ringparam ringparam;

	if (!dev->ethtool_ops->set_ringparam)
		return -EOPNOTSUPP;

	if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
		return -EFAULT;

	return dev->ethtool_ops->set_ringparam(dev, &ringparam);
}

static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };

	if (!dev->ethtool_ops->get_pauseparam)
		return -EOPNOTSUPP;

	dev->ethtool_ops->get_pauseparam(dev, &pauseparam);

	if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
		return -EFAULT;
	return 0;
}

static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_pauseparam pauseparam;

1081
	if (!dev->ethtool_ops->set_pauseparam)
L
Linus Torvalds 已提交
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
		return -EOPNOTSUPP;

	if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
		return -EFAULT;

	return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
}

static int __ethtool_set_sg(struct net_device *dev, u32 data)
{
	int err;

	if (!data && dev->ethtool_ops->set_tso) {
		err = dev->ethtool_ops->set_tso(dev, 0);
		if (err)
			return err;
	}

1100 1101 1102 1103 1104
	if (!data && dev->ethtool_ops->set_ufo) {
		err = dev->ethtool_ops->set_ufo(dev, 0);
		if (err)
			return err;
	}
L
Linus Torvalds 已提交
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
	return dev->ethtool_ops->set_sg(dev, data);
}

static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata;
	int err;

	if (!dev->ethtool_ops->set_tx_csum)
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

	if (!edata.data && dev->ethtool_ops->set_sg) {
		err = __ethtool_set_sg(dev, 0);
		if (err)
			return err;
	}

	return dev->ethtool_ops->set_tx_csum(dev, edata.data);
}
1127
EXPORT_SYMBOL(ethtool_op_set_tx_csum);
L
Linus Torvalds 已提交
1128

H
Herbert Xu 已提交
1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata;

	if (!dev->ethtool_ops->set_rx_csum)
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

	if (!edata.data && dev->ethtool_ops->set_sg)
		dev->features &= ~NETIF_F_GRO;

	return dev->ethtool_ops->set_rx_csum(dev, edata.data);
}

L
Linus Torvalds 已提交
1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata;

	if (!dev->ethtool_ops->set_sg)
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

1155
	if (edata.data &&
1156
	    !(dev->features & NETIF_F_ALL_CSUM))
L
Linus Torvalds 已提交
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
		return -EINVAL;

	return __ethtool_set_sg(dev, edata.data);
}

static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata;

	if (!dev->ethtool_ops->set_tso)
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

	if (edata.data && !(dev->features & NETIF_F_SG))
		return -EINVAL;

	return dev->ethtool_ops->set_tso(dev, edata.data);
}

1178 1179 1180 1181 1182 1183 1184 1185 1186 1187
static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata;

	if (!dev->ethtool_ops->set_ufo)
		return -EOPNOTSUPP;
	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;
	if (edata.data && !(dev->features & NETIF_F_SG))
		return -EINVAL;
1188 1189 1190
	if (edata.data && !((dev->features & NETIF_F_GEN_CSUM) ||
		(dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
			== (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
1191 1192 1193 1194
		return -EINVAL;
	return dev->ethtool_ops->set_ufo(dev, edata.data);
}

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1195 1196 1197 1198 1199 1200
static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata = { ETHTOOL_GGSO };

	edata.data = dev->features & NETIF_F_GSO;
	if (copy_to_user(useraddr, &edata, sizeof(edata)))
1201
		return -EFAULT;
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1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217
	return 0;
}

static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;
	if (edata.data)
		dev->features |= NETIF_F_GSO;
	else
		dev->features &= ~NETIF_F_GSO;
	return 0;
}

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1218 1219 1220 1221 1222 1223
static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata = { ETHTOOL_GGRO };

	edata.data = dev->features & NETIF_F_GRO;
	if (copy_to_user(useraddr, &edata, sizeof(edata)))
1224
		return -EFAULT;
H
Herbert Xu 已提交
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235
	return 0;
}

static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

	if (edata.data) {
1236 1237 1238 1239 1240
		u32 rxcsum = dev->ethtool_ops->get_rx_csum ?
				dev->ethtool_ops->get_rx_csum(dev) :
				ethtool_op_get_rx_csum(dev);

		if (!rxcsum)
H
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1241 1242 1243 1244 1245 1246 1247 1248
			return -EINVAL;
		dev->features |= NETIF_F_GRO;
	} else
		dev->features &= ~NETIF_F_GRO;

	return 0;
}

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static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_test test;
1252
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
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1253
	u64 *data;
1254
	int ret, test_len;
L
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1255

1256
	if (!ops->self_test || !ops->get_sset_count)
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		return -EOPNOTSUPP;

1259
	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1260 1261 1262 1263
	if (test_len < 0)
		return test_len;
	WARN_ON(test_len == 0);

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1264 1265 1266
	if (copy_from_user(&test, useraddr, sizeof(test)))
		return -EFAULT;

1267 1268
	test.len = test_len;
	data = kmalloc(test_len * sizeof(u64), GFP_USER);
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1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
	if (!data)
		return -ENOMEM;

	ops->self_test(dev, &test, data);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &test, sizeof(test)))
		goto out;
	useraddr += sizeof(test);
	if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
		goto out;
	ret = 0;

 out:
	kfree(data);
	return ret;
}

static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_gstrings gstrings;
1290
	const struct ethtool_ops *ops = dev->ethtool_ops;
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	u8 *data;
	int ret;

1294
	if (!ops->get_strings || !ops->get_sset_count)
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		return -EOPNOTSUPP;

	if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
		return -EFAULT;

1300 1301 1302 1303 1304
	ret = ops->get_sset_count(dev, gstrings.string_set);
	if (ret < 0)
		return ret;

	gstrings.len = ret;
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	data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
	if (!data)
		return -ENOMEM;

	ops->get_strings(dev, gstrings.string_set, data);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
		goto out;
	useraddr += sizeof(gstrings);
	if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
		goto out;
	ret = 0;

 out:
	kfree(data);
	return ret;
}

static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_value id;

	if (!dev->ethtool_ops->phys_id)
		return -EOPNOTSUPP;

	if (copy_from_user(&id, useraddr, sizeof(id)))
		return -EFAULT;

	return dev->ethtool_ops->phys_id(dev, id.data);
}

static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_stats stats;
1341
	const struct ethtool_ops *ops = dev->ethtool_ops;
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	u64 *data;
1343
	int ret, n_stats;
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1344

1345
	if (!ops->get_ethtool_stats || !ops->get_sset_count)
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		return -EOPNOTSUPP;

1348
	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1349 1350 1351 1352
	if (n_stats < 0)
		return n_stats;
	WARN_ON(n_stats == 0);

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	if (copy_from_user(&stats, useraddr, sizeof(stats)))
		return -EFAULT;

1356 1357
	stats.n_stats = n_stats;
	data = kmalloc(n_stats * sizeof(u64), GFP_USER);
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	if (!data)
		return -ENOMEM;

	ops->get_ethtool_stats(dev, &stats, data);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &stats, sizeof(stats)))
		goto out;
	useraddr += sizeof(stats);
	if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
		goto out;
	ret = 0;

 out:
	kfree(data);
	return ret;
}

1376
static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1377 1378 1379
{
	struct ethtool_perm_addr epaddr;

1380
	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1381 1382
		return -EFAULT;

1383 1384 1385
	if (epaddr.size < dev->addr_len)
		return -ETOOSMALL;
	epaddr.size = dev->addr_len;
1386 1387

	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1388
		return -EFAULT;
1389
	useraddr += sizeof(epaddr);
1390 1391 1392
	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
		return -EFAULT;
	return 0;
1393 1394
}

1395 1396
static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
			     u32 cmd, u32 (*actor)(struct net_device *))
1397
{
1398
	struct ethtool_value edata = { .cmd = cmd };
1399

1400
	if (!actor)
1401 1402
		return -EOPNOTSUPP;

1403
	edata.data = actor(dev);
1404 1405 1406 1407 1408 1409

	if (copy_to_user(useraddr, &edata, sizeof(edata)))
		return -EFAULT;
	return 0;
}

1410 1411
static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
			     void (*actor)(struct net_device *, u32))
1412 1413 1414
{
	struct ethtool_value edata;

1415
	if (!actor)
1416 1417 1418 1419 1420
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

1421
	actor(dev, edata.data);
1422 1423 1424
	return 0;
}

1425 1426
static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
			     int (*actor)(struct net_device *, u32))
1427 1428 1429
{
	struct ethtool_value edata;

1430
	if (!actor)
1431 1432 1433 1434 1435
		return -EOPNOTSUPP;

	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

1436
	return actor(dev, edata.data);
1437 1438
}

1439 1440
static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
						   char __user *useraddr)
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452
{
	struct ethtool_flash efl;

	if (copy_from_user(&efl, useraddr, sizeof(efl)))
		return -EFAULT;

	if (!dev->ethtool_ops->flash_device)
		return -EOPNOTSUPP;

	return dev->ethtool_ops->flash_device(dev, &efl);
}

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/* The main entry point in this file.  Called from net/core/dev.c */

1455
int dev_ethtool(struct net *net, struct ifreq *ifr)
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{
1457
	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
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	void __user *useraddr = ifr->ifr_data;
	u32 ethcmd;
	int rc;
1461
	unsigned long old_features;
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	if (!dev || !netif_device_present(dev))
		return -ENODEV;

1466
	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
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		return -EFAULT;

1469 1470 1471 1472 1473 1474 1475 1476 1477 1478
	if (!dev->ethtool_ops) {
		/* ETHTOOL_GDRVINFO does not require any driver support.
		 * It is also unprivileged and does not change anything,
		 * so we can take a shortcut to it. */
		if (ethcmd == ETHTOOL_GDRVINFO)
			return ethtool_get_drvinfo(dev, useraddr);
		else
			return -EOPNOTSUPP;
	}

1479
	/* Allow some commands to be done by anyone */
1480
	switch (ethcmd) {
1481
	case ETHTOOL_GSET:
1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
	case ETHTOOL_GDRVINFO:
	case ETHTOOL_GMSGLVL:
	case ETHTOOL_GCOALESCE:
	case ETHTOOL_GRINGPARAM:
	case ETHTOOL_GPAUSEPARAM:
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
	case ETHTOOL_GSG:
	case ETHTOOL_GSTRINGS:
	case ETHTOOL_GTSO:
	case ETHTOOL_GPERMADDR:
	case ETHTOOL_GUFO:
	case ETHTOOL_GGSO:
1495
	case ETHTOOL_GGRO:
1496 1497
	case ETHTOOL_GFLAGS:
	case ETHTOOL_GPFLAGS:
1498
	case ETHTOOL_GRXFH:
1499 1500 1501 1502
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
1503 1504 1505 1506 1507 1508
		break;
	default:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
	}

1509 1510 1511
	if (dev->ethtool_ops->begin) {
		rc = dev->ethtool_ops->begin(dev);
		if (rc  < 0)
L
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1512
			return rc;
1513
	}
1514 1515
	old_features = dev->features;

L
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	switch (ethcmd) {
	case ETHTOOL_GSET:
		rc = ethtool_get_settings(dev, useraddr);
		break;
	case ETHTOOL_SSET:
		rc = ethtool_set_settings(dev, useraddr);
		break;
	case ETHTOOL_GDRVINFO:
		rc = ethtool_get_drvinfo(dev, useraddr);
		break;
	case ETHTOOL_GREGS:
		rc = ethtool_get_regs(dev, useraddr);
		break;
	case ETHTOOL_GWOL:
		rc = ethtool_get_wol(dev, useraddr);
		break;
	case ETHTOOL_SWOL:
		rc = ethtool_set_wol(dev, useraddr);
		break;
	case ETHTOOL_GMSGLVL:
1536 1537
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_msglevel);
L
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1538 1539
		break;
	case ETHTOOL_SMSGLVL:
1540 1541
		rc = ethtool_set_value_void(dev, useraddr,
				       dev->ethtool_ops->set_msglevel);
L
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1542 1543 1544 1545 1546
		break;
	case ETHTOOL_NWAY_RST:
		rc = ethtool_nway_reset(dev);
		break;
	case ETHTOOL_GLINK:
1547
		rc = ethtool_get_link(dev, useraddr);
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1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
		break;
	case ETHTOOL_GEEPROM:
		rc = ethtool_get_eeprom(dev, useraddr);
		break;
	case ETHTOOL_SEEPROM:
		rc = ethtool_set_eeprom(dev, useraddr);
		break;
	case ETHTOOL_GCOALESCE:
		rc = ethtool_get_coalesce(dev, useraddr);
		break;
	case ETHTOOL_SCOALESCE:
		rc = ethtool_set_coalesce(dev, useraddr);
		break;
	case ETHTOOL_GRINGPARAM:
		rc = ethtool_get_ringparam(dev, useraddr);
		break;
	case ETHTOOL_SRINGPARAM:
		rc = ethtool_set_ringparam(dev, useraddr);
		break;
	case ETHTOOL_GPAUSEPARAM:
		rc = ethtool_get_pauseparam(dev, useraddr);
		break;
	case ETHTOOL_SPAUSEPARAM:
		rc = ethtool_set_pauseparam(dev, useraddr);
		break;
	case ETHTOOL_GRXCSUM:
1574
		rc = ethtool_get_value(dev, useraddr, ethcmd,
1575 1576 1577
				       (dev->ethtool_ops->get_rx_csum ?
					dev->ethtool_ops->get_rx_csum :
					ethtool_op_get_rx_csum));
L
Linus Torvalds 已提交
1578 1579
		break;
	case ETHTOOL_SRXCSUM:
H
Herbert Xu 已提交
1580
		rc = ethtool_set_rx_csum(dev, useraddr);
L
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1581 1582
		break;
	case ETHTOOL_GTXCSUM:
1583
		rc = ethtool_get_value(dev, useraddr, ethcmd,
1584 1585 1586
				       (dev->ethtool_ops->get_tx_csum ?
					dev->ethtool_ops->get_tx_csum :
					ethtool_op_get_tx_csum));
L
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1587 1588 1589 1590 1591
		break;
	case ETHTOOL_STXCSUM:
		rc = ethtool_set_tx_csum(dev, useraddr);
		break;
	case ETHTOOL_GSG:
1592
		rc = ethtool_get_value(dev, useraddr, ethcmd,
1593 1594 1595
				       (dev->ethtool_ops->get_sg ?
					dev->ethtool_ops->get_sg :
					ethtool_op_get_sg));
L
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1596 1597 1598 1599 1600
		break;
	case ETHTOOL_SSG:
		rc = ethtool_set_sg(dev, useraddr);
		break;
	case ETHTOOL_GTSO:
1601
		rc = ethtool_get_value(dev, useraddr, ethcmd,
1602 1603 1604
				       (dev->ethtool_ops->get_tso ?
					dev->ethtool_ops->get_tso :
					ethtool_op_get_tso));
L
Linus Torvalds 已提交
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
		break;
	case ETHTOOL_STSO:
		rc = ethtool_set_tso(dev, useraddr);
		break;
	case ETHTOOL_TEST:
		rc = ethtool_self_test(dev, useraddr);
		break;
	case ETHTOOL_GSTRINGS:
		rc = ethtool_get_strings(dev, useraddr);
		break;
	case ETHTOOL_PHYS_ID:
		rc = ethtool_phys_id(dev, useraddr);
		break;
	case ETHTOOL_GSTATS:
		rc = ethtool_get_stats(dev, useraddr);
		break;
1621 1622 1623
	case ETHTOOL_GPERMADDR:
		rc = ethtool_get_perm_addr(dev, useraddr);
		break;
1624
	case ETHTOOL_GUFO:
1625
		rc = ethtool_get_value(dev, useraddr, ethcmd,
1626 1627 1628
				       (dev->ethtool_ops->get_ufo ?
					dev->ethtool_ops->get_ufo :
					ethtool_op_get_ufo));
1629 1630 1631 1632
		break;
	case ETHTOOL_SUFO:
		rc = ethtool_set_ufo(dev, useraddr);
		break;
H
Herbert Xu 已提交
1633 1634 1635 1636 1637 1638
	case ETHTOOL_GGSO:
		rc = ethtool_get_gso(dev, useraddr);
		break;
	case ETHTOOL_SGSO:
		rc = ethtool_set_gso(dev, useraddr);
		break;
1639
	case ETHTOOL_GFLAGS:
1640
		rc = ethtool_get_value(dev, useraddr, ethcmd,
1641 1642 1643
				       (dev->ethtool_ops->get_flags ?
					dev->ethtool_ops->get_flags :
					ethtool_op_get_flags));
1644 1645
		break;
	case ETHTOOL_SFLAGS:
1646 1647
		rc = ethtool_set_value(dev, useraddr,
				       dev->ethtool_ops->set_flags);
1648
		break;
1649
	case ETHTOOL_GPFLAGS:
1650 1651
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_priv_flags);
1652 1653
		break;
	case ETHTOOL_SPFLAGS:
1654 1655
		rc = ethtool_set_value(dev, useraddr,
				       dev->ethtool_ops->set_priv_flags);
1656
		break;
1657
	case ETHTOOL_GRXFH:
1658 1659 1660 1661
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
1662
		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1663 1664
		break;
	case ETHTOOL_SRXFH:
1665 1666
	case ETHTOOL_SRXCLSRLDEL:
	case ETHTOOL_SRXCLSRLINS:
1667
		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1668
		break;
H
Herbert Xu 已提交
1669 1670 1671 1672 1673 1674
	case ETHTOOL_GGRO:
		rc = ethtool_get_gro(dev, useraddr);
		break;
	case ETHTOOL_SGRO:
		rc = ethtool_set_gro(dev, useraddr);
		break;
1675 1676 1677
	case ETHTOOL_FLASHDEV:
		rc = ethtool_flash_device(dev, useraddr);
		break;
B
Ben Hutchings 已提交
1678 1679 1680
	case ETHTOOL_RESET:
		rc = ethtool_reset(dev, useraddr);
		break;
1681 1682 1683 1684 1685 1686
	case ETHTOOL_SRXNTUPLE:
		rc = ethtool_set_rx_ntuple(dev, useraddr);
		break;
	case ETHTOOL_GRXNTUPLE:
		rc = ethtool_get_rx_ntuple(dev, useraddr);
		break;
1687 1688 1689
	case ETHTOOL_GSSET_INFO:
		rc = ethtool_get_sset_info(dev, useraddr);
		break;
1690 1691 1692 1693 1694 1695
	case ETHTOOL_GRXFHINDIR:
		rc = ethtool_get_rxfh_indir(dev, useraddr);
		break;
	case ETHTOOL_SRXFHINDIR:
		rc = ethtool_set_rxfh_indir(dev, useraddr);
		break;
L
Linus Torvalds 已提交
1696
	default:
1697
		rc = -EOPNOTSUPP;
L
Linus Torvalds 已提交
1698
	}
1699

1700
	if (dev->ethtool_ops->complete)
L
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1701
		dev->ethtool_ops->complete(dev);
1702 1703 1704 1705

	if (old_features != dev->features)
		netdev_features_change(dev);

L
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1706 1707
	return rc;
}