ioctl.c 78.4 KB
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// SPDX-License-Identifier: GPL-2.0-or-later
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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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 */

#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/net_tstamp.h>
#include <linux/phy.h>
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#include <linux/bitops.h>
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#include <linux/uaccess.h>
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#include <linux/vermagic.h>
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#include <linux/vmalloc.h>
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#include <linux/sfp.h>
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
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#include <linux/sched/signal.h>
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#include <linux/net.h>
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#include <net/devlink.h>
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#include <net/xdp_sock.h>
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#include <net/flow_offload.h>
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#include <linux/ethtool_netlink.h>
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#include "common.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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int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
{
	info->so_timestamping =
		SOF_TIMESTAMPING_TX_SOFTWARE |
		SOF_TIMESTAMPING_RX_SOFTWARE |
		SOF_TIMESTAMPING_SOFTWARE;
	info->phc_index = -1;
	return 0;
}
EXPORT_SYMBOL(ethtool_op_get_ts_info);

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/* Handlers for each ethtool command */

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static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_gfeatures cmd = {
		.cmd = ETHTOOL_GFEATURES,
		.size = ETHTOOL_DEV_FEATURE_WORDS,
	};
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	struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
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	u32 __user *sizeaddr;
	u32 copy_size;
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	int i;

	/* in case feature bits run out again */
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	BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
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	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
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		features[i].available = (u32)(dev->hw_features >> (32 * i));
		features[i].requested = (u32)(dev->wanted_features >> (32 * i));
		features[i].active = (u32)(dev->features >> (32 * i));
		features[i].never_changed =
			(u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
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	}
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	sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
	if (get_user(copy_size, sizeaddr))
		return -EFAULT;

	if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
		copy_size = ETHTOOL_DEV_FEATURE_WORDS;

	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
		return -EFAULT;
	useraddr += sizeof(cmd);
	if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
		return -EFAULT;

	return 0;
}

static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_sfeatures cmd;
	struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
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	netdev_features_t wanted = 0, valid = 0;
	int i, ret = 0;
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	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
		return -EFAULT;
	useraddr += sizeof(cmd);

	if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
		return -EINVAL;

	if (copy_from_user(features, useraddr, sizeof(features)))
		return -EFAULT;

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	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
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		valid |= (netdev_features_t)features[i].valid << (32 * i);
		wanted |= (netdev_features_t)features[i].requested << (32 * i);
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	}

	if (valid & ~NETIF_F_ETHTOOL_BITS)
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		return -EINVAL;

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	if (valid & ~dev->hw_features) {
		valid &= dev->hw_features;
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		ret |= ETHTOOL_F_UNSUPPORTED;
	}

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	dev->wanted_features &= ~valid;
	dev->wanted_features |= wanted & valid;
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	__netdev_update_features(dev);
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	if ((dev->wanted_features ^ dev->features) & valid)
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		ret |= ETHTOOL_F_WISH;

	return ret;
}

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static int __ethtool_get_sset_count(struct net_device *dev, int sset)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

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	if (sset == ETH_SS_FEATURES)
		return ARRAY_SIZE(netdev_features_strings);

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	if (sset == ETH_SS_RSS_HASH_FUNCS)
		return ARRAY_SIZE(rss_hash_func_strings);

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	if (sset == ETH_SS_TUNABLES)
		return ARRAY_SIZE(tunable_strings);

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	if (sset == ETH_SS_PHY_TUNABLES)
		return ARRAY_SIZE(phy_tunable_strings);

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	if (sset == ETH_SS_PHY_STATS && dev->phydev &&
	    !ops->get_ethtool_phy_stats)
		return phy_ethtool_get_sset_count(dev->phydev);
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	if (sset == ETH_SS_LINK_MODES)
		return __ETHTOOL_LINK_MODE_MASK_NBITS;

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	if (ops->get_sset_count && ops->get_strings)
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		return ops->get_sset_count(dev, sset);
	else
		return -EOPNOTSUPP;
}

static void __ethtool_get_strings(struct net_device *dev,
	u32 stringset, u8 *data)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

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	if (stringset == ETH_SS_FEATURES)
		memcpy(data, netdev_features_strings,
			sizeof(netdev_features_strings));
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	else if (stringset == ETH_SS_RSS_HASH_FUNCS)
		memcpy(data, rss_hash_func_strings,
		       sizeof(rss_hash_func_strings));
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	else if (stringset == ETH_SS_TUNABLES)
		memcpy(data, tunable_strings, sizeof(tunable_strings));
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	else if (stringset == ETH_SS_PHY_TUNABLES)
		memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
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	else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
		 !ops->get_ethtool_phy_stats)
		phy_ethtool_get_strings(dev->phydev, data);
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	else if (stringset == ETH_SS_LINK_MODES)
		memcpy(data, link_mode_names,
		       __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
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	else
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		/* ops->get_strings is valid because checked earlier */
		ops->get_strings(dev, stringset, data);
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}

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static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
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{
	/* feature masks of legacy discrete ethtool ops */

	switch (eth_cmd) {
	case ETHTOOL_GTXCSUM:
	case ETHTOOL_STXCSUM:
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		return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
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		       NETIF_F_SCTP_CRC;
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	case ETHTOOL_GRXCSUM:
	case ETHTOOL_SRXCSUM:
		return NETIF_F_RXCSUM;
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	case ETHTOOL_GSG:
	case ETHTOOL_SSG:
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		return NETIF_F_SG | NETIF_F_FRAGLIST;
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	case ETHTOOL_GTSO:
	case ETHTOOL_STSO:
		return NETIF_F_ALL_TSO;
	case ETHTOOL_GGSO:
	case ETHTOOL_SGSO:
		return NETIF_F_GSO;
	case ETHTOOL_GGRO:
	case ETHTOOL_SGRO:
		return NETIF_F_GRO;
	default:
		BUG();
	}
}

static int ethtool_get_one_feature(struct net_device *dev,
	char __user *useraddr, u32 ethcmd)
{
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	netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
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	struct ethtool_value edata = {
		.cmd = ethcmd,
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		.data = !!(dev->features & mask),
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	};

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

static int ethtool_set_one_feature(struct net_device *dev,
	void __user *useraddr, u32 ethcmd)
{
	struct ethtool_value edata;
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	netdev_features_t mask;
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	if (copy_from_user(&edata, useraddr, sizeof(edata)))
		return -EFAULT;

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	mask = ethtool_get_feature_mask(ethcmd);
	mask &= dev->hw_features;
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	if (!mask)
		return -EOPNOTSUPP;
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	if (edata.data)
		dev->wanted_features |= mask;
	else
		dev->wanted_features &= ~mask;
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	__netdev_update_features(dev);
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	return 0;
}

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#define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
			  ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
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#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
			  NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
			  NETIF_F_RXHASH)
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static u32 __ethtool_get_flags(struct net_device *dev)
{
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	u32 flags = 0;

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	if (dev->features & NETIF_F_LRO)
		flags |= ETH_FLAG_LRO;
	if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
		flags |= ETH_FLAG_RXVLAN;
	if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
		flags |= ETH_FLAG_TXVLAN;
	if (dev->features & NETIF_F_NTUPLE)
		flags |= ETH_FLAG_NTUPLE;
	if (dev->features & NETIF_F_RXHASH)
		flags |= ETH_FLAG_RXHASH;
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	return flags;
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}

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static int __ethtool_set_flags(struct net_device *dev, u32 data)
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{
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	netdev_features_t features = 0, changed;
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	if (data & ~ETH_ALL_FLAGS)
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		return -EINVAL;

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	if (data & ETH_FLAG_LRO)
		features |= NETIF_F_LRO;
	if (data & ETH_FLAG_RXVLAN)
		features |= NETIF_F_HW_VLAN_CTAG_RX;
	if (data & ETH_FLAG_TXVLAN)
		features |= NETIF_F_HW_VLAN_CTAG_TX;
	if (data & ETH_FLAG_NTUPLE)
		features |= NETIF_F_NTUPLE;
	if (data & ETH_FLAG_RXHASH)
		features |= NETIF_F_RXHASH;
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	/* allow changing only bits set in hw_features */
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	changed = (features ^ dev->features) & ETH_ALL_FEATURES;
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	if (changed & ~dev->hw_features)
		return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;

	dev->wanted_features =
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		(dev->wanted_features & ~changed) | (features & changed);
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	__netdev_update_features(dev);
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	return 0;
}

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/* Given two link masks, AND them together and save the result in dst. */
void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
				  struct ethtool_link_ksettings *src)
{
	unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
	unsigned int idx = 0;

	for (; idx < size; idx++) {
		dst->link_modes.supported[idx] &=
			src->link_modes.supported[idx];
		dst->link_modes.advertising[idx] &=
			src->link_modes.advertising[idx];
	}
}
EXPORT_SYMBOL(ethtool_intersect_link_masks);

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void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
					     u32 legacy_u32)
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{
	bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
	dst[0] = legacy_u32;
}
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EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
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/* return false if src had higher bits set. lower bits always updated. */
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bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
					     const unsigned long *src)
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{
	bool retval = true;

	/* TODO: following test will soon always be true */
	if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
		__ETHTOOL_DECLARE_LINK_MODE_MASK(ext);

		bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
		bitmap_fill(ext, 32);
		bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
		if (bitmap_intersects(ext, src,
				      __ETHTOOL_LINK_MODE_MASK_NBITS)) {
			/* src mask goes beyond bit 31 */
			retval = false;
		}
	}
	*legacy_u32 = src[0];
	return retval;
}
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EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
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/* return false if ksettings link modes had higher bits
 * set. legacy_settings always updated (best effort)
 */
static bool
convert_link_ksettings_to_legacy_settings(
	struct ethtool_cmd *legacy_settings,
	const struct ethtool_link_ksettings *link_ksettings)
{
	bool retval = true;

	memset(legacy_settings, 0, sizeof(*legacy_settings));
	/* this also clears the deprecated fields in legacy structure:
	 * __u8		transceiver;
	 * __u32	maxtxpkt;
	 * __u32	maxrxpkt;
	 */

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	retval &= ethtool_convert_link_mode_to_legacy_u32(
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		&legacy_settings->supported,
		link_ksettings->link_modes.supported);
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	retval &= ethtool_convert_link_mode_to_legacy_u32(
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		&legacy_settings->advertising,
		link_ksettings->link_modes.advertising);
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	retval &= ethtool_convert_link_mode_to_legacy_u32(
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		&legacy_settings->lp_advertising,
		link_ksettings->link_modes.lp_advertising);
	ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
	legacy_settings->duplex
		= link_ksettings->base.duplex;
	legacy_settings->port
		= link_ksettings->base.port;
	legacy_settings->phy_address
		= link_ksettings->base.phy_address;
	legacy_settings->autoneg
		= link_ksettings->base.autoneg;
	legacy_settings->mdio_support
		= link_ksettings->base.mdio_support;
	legacy_settings->eth_tp_mdix
		= link_ksettings->base.eth_tp_mdix;
	legacy_settings->eth_tp_mdix_ctrl
		= link_ksettings->base.eth_tp_mdix_ctrl;
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	legacy_settings->transceiver
		= link_ksettings->base.transceiver;
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	return retval;
}

/* number of 32-bit words to store the user's link mode bitmaps */
#define __ETHTOOL_LINK_MODE_MASK_NU32			\
	DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)

/* layout of the struct passed from/to userland */
struct ethtool_link_usettings {
	struct ethtool_link_settings base;
	struct {
		__u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
		__u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
		__u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
	} link_modes;
};

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/* Internal kernel helper to query a device ethtool_link_settings. */
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int __ethtool_get_link_ksettings(struct net_device *dev,
				 struct ethtool_link_ksettings *link_ksettings)
{
	ASSERT_RTNL();

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

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	memset(link_ksettings, 0, sizeof(*link_ksettings));
	return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
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}
EXPORT_SYMBOL(__ethtool_get_link_ksettings);

/* convert ethtool_link_usettings in user space to a kernel internal
 * ethtool_link_ksettings. return 0 on success, errno on error.
 */
static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
					 const void __user *from)
{
	struct ethtool_link_usettings link_usettings;

	if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
		return -EFAULT;

	memcpy(&to->base, &link_usettings.base, sizeof(to->base));
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	bitmap_from_arr32(to->link_modes.supported,
			  link_usettings.link_modes.supported,
			  __ETHTOOL_LINK_MODE_MASK_NBITS);
	bitmap_from_arr32(to->link_modes.advertising,
			  link_usettings.link_modes.advertising,
			  __ETHTOOL_LINK_MODE_MASK_NBITS);
	bitmap_from_arr32(to->link_modes.lp_advertising,
			  link_usettings.link_modes.lp_advertising,
			  __ETHTOOL_LINK_MODE_MASK_NBITS);
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	return 0;
}

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/* Check if the user is trying to change anything besides speed/duplex */
bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
{
	struct ethtool_link_settings base2 = {};

	base2.speed = cmd->base.speed;
	base2.port = PORT_OTHER;
	base2.duplex = cmd->base.duplex;
	base2.cmd = cmd->base.cmd;
	base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;

	return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
		bitmap_empty(cmd->link_modes.supported,
			     __ETHTOOL_LINK_MODE_MASK_NBITS) &&
		bitmap_empty(cmd->link_modes.lp_advertising,
			     __ETHTOOL_LINK_MODE_MASK_NBITS);
}

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/* convert a kernel internal ethtool_link_ksettings to
 * ethtool_link_usettings in user space. return 0 on success, errno on
 * error.
 */
static int
store_link_ksettings_for_user(void __user *to,
			      const struct ethtool_link_ksettings *from)
{
	struct ethtool_link_usettings link_usettings;

	memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
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	bitmap_to_arr32(link_usettings.link_modes.supported,
			from->link_modes.supported,
			__ETHTOOL_LINK_MODE_MASK_NBITS);
	bitmap_to_arr32(link_usettings.link_modes.advertising,
			from->link_modes.advertising,
			__ETHTOOL_LINK_MODE_MASK_NBITS);
	bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
			from->link_modes.lp_advertising,
			__ETHTOOL_LINK_MODE_MASK_NBITS);
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	if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
		return -EFAULT;

	return 0;
}

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/* Query device for its ethtool_link_settings. */
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static int ethtool_get_link_ksettings(struct net_device *dev,
				      void __user *useraddr)
{
	int err = 0;
	struct ethtool_link_ksettings link_ksettings;

	ASSERT_RTNL();
	if (!dev->ethtool_ops->get_link_ksettings)
		return -EOPNOTSUPP;

	/* handle bitmap nbits handshake */
	if (copy_from_user(&link_ksettings.base, useraddr,
			   sizeof(link_ksettings.base)))
		return -EFAULT;

	if (__ETHTOOL_LINK_MODE_MASK_NU32
	    != link_ksettings.base.link_mode_masks_nwords) {
		/* wrong link mode nbits requested */
		memset(&link_ksettings, 0, sizeof(link_ksettings));
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		link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
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		/* send back number of words required as negative val */
		compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
				   "need too many bits for link modes!");
		link_ksettings.base.link_mode_masks_nwords
			= -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);

		/* copy the base fields back to user, not the link
		 * mode bitmaps
		 */
		if (copy_to_user(useraddr, &link_ksettings.base,
				 sizeof(link_ksettings.base)))
			return -EFAULT;

		return 0;
	}

	/* handshake successful: user/kernel agree on
	 * link_mode_masks_nwords
	 */

	memset(&link_ksettings, 0, sizeof(link_ksettings));
	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
	if (err < 0)
		return err;

	/* make sure we tell the right values to user */
	link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
	link_ksettings.base.link_mode_masks_nwords
		= __ETHTOOL_LINK_MODE_MASK_NU32;

	return store_link_ksettings_for_user(useraddr, &link_ksettings);
}

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/* Update device ethtool_link_settings. */
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static int ethtool_set_link_ksettings(struct net_device *dev,
				      void __user *useraddr)
{
	int err;
	struct ethtool_link_ksettings link_ksettings;

	ASSERT_RTNL();

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

	/* make sure nbits field has expected value */
	if (copy_from_user(&link_ksettings.base, useraddr,
			   sizeof(link_ksettings.base)))
		return -EFAULT;

	if (__ETHTOOL_LINK_MODE_MASK_NU32
	    != link_ksettings.base.link_mode_masks_nwords)
		return -EINVAL;

	/* copy the whole structure, now that we know it has expected
	 * format
	 */
	err = load_link_ksettings_from_user(&link_ksettings, useraddr);
	if (err)
		return err;

	/* re-check nwords field, just in case */
	if (__ETHTOOL_LINK_MODE_MASK_NU32
	    != link_ksettings.base.link_mode_masks_nwords)
		return -EINVAL;

593
	err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
594
	if (err >= 0) {
595
		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
596 597
		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
	}
598
	return err;
599 600
}

601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
				       const struct ethtool_link_ksettings *cmd,
				       u32 *dev_speed, u8 *dev_duplex)
{
	u32 speed;
	u8 duplex;

	speed = cmd->base.speed;
	duplex = cmd->base.duplex;
	/* don't allow custom speed and duplex */
	if (!ethtool_validate_speed(speed) ||
	    !ethtool_validate_duplex(duplex) ||
	    !ethtool_virtdev_validate_cmd(cmd))
		return -EINVAL;
	*dev_speed = speed;
	*dev_duplex = duplex;

	return 0;
}
EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);

622 623
/* Query device for its ethtool_cmd settings.
 *
624 625 626 627 628 629
 * Backward compatibility note: for compatibility with legacy ethtool, this is
 * now implemented via get_link_ksettings. When driver reports higher link mode
 * bits, a kernel warning is logged once (with name of 1st driver/device) to
 * recommend user to upgrade ethtool, but the command is successful (only the
 * lower link mode bits reported back to user). Deprecated fields from
 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
630
 */
631 632
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
{
633
	struct ethtool_link_ksettings link_ksettings;
634
	struct ethtool_cmd cmd;
635
	int err;
636

637
	ASSERT_RTNL();
638 639
	if (!dev->ethtool_ops->get_link_ksettings)
		return -EOPNOTSUPP;
640

641 642 643 644 645
	memset(&link_ksettings, 0, sizeof(link_ksettings));
	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
	if (err < 0)
		return err;
	convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
646

647 648
	/* send a sensible cmd tag back to user */
	cmd.cmd = ETHTOOL_GSET;
L
Linus Torvalds 已提交
649 650 651

	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
		return -EFAULT;
652

L
Linus Torvalds 已提交
653 654 655
	return 0;
}

656 657
/* Update device link settings with given ethtool_cmd.
 *
658 659 660 661 662
 * Backward compatibility note: for compatibility with legacy ethtool, this is
 * now always implemented via set_link_settings. When user's request updates
 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 * warning is logged once (with name of 1st driver/device) to recommend user to
 * upgrade ethtool, and the request is rejected.
663
 */
L
Linus Torvalds 已提交
664 665
static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
{
666
	struct ethtool_link_ksettings link_ksettings;
L
Linus Torvalds 已提交
667
	struct ethtool_cmd cmd;
668
	int ret;
L
Linus Torvalds 已提交
669

670
	ASSERT_RTNL();
L
Linus Torvalds 已提交
671 672 673

	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
		return -EFAULT;
674
	if (!dev->ethtool_ops->set_link_ksettings)
675 676
		return -EOPNOTSUPP;

677 678 679 680
	if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
		return -EINVAL;
	link_ksettings.base.link_mode_masks_nwords =
		__ETHTOOL_LINK_MODE_MASK_NU32;
681
	ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
682
	if (ret >= 0) {
683
		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
684 685
		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
	}
686
	return ret;
L
Linus Torvalds 已提交
687 688
}

689 690
static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
						  void __user *useraddr)
L
Linus Torvalds 已提交
691 692
{
	struct ethtool_drvinfo info;
693
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
694 695 696

	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GDRVINFO;
697
	strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
698
	if (ops->get_drvinfo) {
699 700 701 702 703 704 705 706 707
		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;
	}
L
Linus Torvalds 已提交
708

709 710
	/*
	 * this method of obtaining string set info is deprecated;
711
	 * Use ETHTOOL_GSSET_INFO instead.
712
	 */
713
	if (ops->get_sset_count) {
714 715 716 717 718 719 720 721
		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;
722 723 724
		rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
		if (rc >= 0)
			info.n_priv_flags = rc;
725
	}
726 727 728 729 730 731 732
	if (ops->get_regs_len) {
		int ret = ops->get_regs_len(dev);

		if (ret > 0)
			info.regdump_len = ret;
	}

733
	if (ops->get_eeprom_len)
L
Linus Torvalds 已提交
734 735
		info.eedump_len = ops->get_eeprom_len(dev);

736 737 738 739
	if (!info.fw_version[0])
		devlink_compat_running_version(dev, info.fw_version,
					       sizeof(info.fw_version));

L
Linus Torvalds 已提交
740 741 742 743 744
	if (copy_to_user(useraddr, &info, sizeof(info)))
		return -EFAULT;
	return 0;
}

E
Eric Dumazet 已提交
745
static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
746
						    void __user *useraddr)
747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
{
	struct ethtool_sset_info info;
	u64 sset_mask;
	int i, idx = 0, n_bits = 0, ret, rc;
	u32 *info_buf = NULL;

	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 */
762
	n_bits = hweight64(sset_mask);
763 764 765 766

	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GSSET_INFO;

K
Kees Cook 已提交
767
	info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
768 769 770 771 772 773 774 775 776 777 778
	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;

779
		rc = __ethtool_get_sset_count(dev, i);
780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
		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;
}

801
static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
802
						u32 cmd, void __user *useraddr)
803
{
804 805
	struct ethtool_rxnfc info;
	size_t info_size = sizeof(info);
806
	int rc;
807

808
	if (!dev->ethtool_ops->set_rxnfc)
809 810
		return -EOPNOTSUPP;

811 812 813 814 815 816 817 818 819
	/* 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))
820 821
		return -EFAULT;

822 823 824 825 826 827 828 829 830
	rc = dev->ethtool_ops->set_rxnfc(dev, &info);
	if (rc)
		return rc;

	if (cmd == ETHTOOL_SRXCLSRLINS &&
	    copy_to_user(useraddr, &info, info_size))
		return -EFAULT;

	return 0;
831 832
}

833
static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
834
						u32 cmd, void __user *useraddr)
835 836
{
	struct ethtool_rxnfc info;
837
	size_t info_size = sizeof(info);
838 839 840
	const struct ethtool_ops *ops = dev->ethtool_ops;
	int ret;
	void *rule_buf = NULL;
841

842
	if (!ops->get_rxnfc)
843 844
		return -EOPNOTSUPP;

845 846 847 848 849 850 851 852 853
	/* 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))
854 855
		return -EFAULT;

856 857 858 859 860 861 862
	/* If FLOW_RSS was requested then user-space must be using the
	 * new definition, as FLOW_RSS is newer.
	 */
	if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
		info_size = sizeof(info);
		if (copy_from_user(&info, useraddr, info_size))
			return -EFAULT;
863 864 865 866 867
		/* Since malicious users may modify the original data,
		 * we need to check whether FLOW_RSS is still requested.
		 */
		if (!(info.flow_type & FLOW_RSS))
			return -EINVAL;
868 869
	}

W
Wenwen Wang 已提交
870 871 872
	if (info.cmd != cmd)
		return -EINVAL;

873 874
	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
		if (info.rule_cnt > 0) {
875
			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
K
Kees Cook 已提交
876
				rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
877
						   GFP_USER);
878 879 880 881
			if (!rule_buf)
				return -ENOMEM;
		}
	}
882

883 884 885 886 887
	ret = ops->get_rxnfc(dev, &info, rule_buf);
	if (ret < 0)
		goto err_out;

	ret = -EFAULT;
888
	if (copy_to_user(useraddr, &info, info_size))
889 890 891 892 893 894 895 896 897 898 899
		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:
900
	kfree(rule_buf);
901 902

	return ret;
903 904
}

905 906 907 908
static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
					struct ethtool_rxnfc *rx_rings,
					u32 size)
{
909
	int i;
910 911

	if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
912
		return -EFAULT;
913 914

	/* Validate ring indices */
915 916 917 918 919
	for (i = 0; i < size; i++)
		if (indir[i] >= rx_rings->data)
			return -EINVAL;

	return 0;
920 921
}

922
u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
923 924 925 926 927 928 929 930 931

void netdev_rss_key_fill(void *buffer, size_t len)
{
	BUG_ON(len > sizeof(netdev_rss_key));
	net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
	memcpy(buffer, netdev_rss_key, len);
}
EXPORT_SYMBOL(netdev_rss_key_fill);

932 933 934
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
935 936
	u32 user_size, dev_size;
	u32 *indir;
937 938
	int ret;

939
	if (!dev->ethtool_ops->get_rxfh_indir_size ||
940
	    !dev->ethtool_ops->get_rxfh)
941 942 943
		return -EOPNOTSUPP;
	dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
	if (dev_size == 0)
944 945
		return -EOPNOTSUPP;

946
	if (copy_from_user(&user_size,
947
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
948
			   sizeof(user_size)))
949 950
		return -EFAULT;

951 952 953 954 955 956 957 958 959 960 961 962
	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
			 &dev_size, sizeof(dev_size)))
		return -EFAULT;

	/* If the user buffer size is 0, this is just a query for the
	 * device table size.  Otherwise, if it's smaller than the
	 * device table size it's an error.
	 */
	if (user_size < dev_size)
		return user_size == 0 ? 0 : -EINVAL;

	indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
963 964 965
	if (!indir)
		return -ENOMEM;

966
	ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
967 968 969
	if (ret)
		goto out;

970 971 972
	if (copy_to_user(useraddr +
			 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
			 indir, dev_size * sizeof(indir[0])))
973 974 975 976 977 978 979 980 981 982
		ret = -EFAULT;

out:
	kfree(indir);
	return ret;
}

static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
983 984 985
	struct ethtool_rxnfc rx_rings;
	u32 user_size, dev_size, i;
	u32 *indir;
986
	const struct ethtool_ops *ops = dev->ethtool_ops;
987
	int ret;
988
	u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
989

990
	if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
991
	    !ops->get_rxnfc)
992
		return -EOPNOTSUPP;
993 994

	dev_size = ops->get_rxfh_indir_size(dev);
995
	if (dev_size == 0)
996 997
		return -EOPNOTSUPP;

998
	if (copy_from_user(&user_size,
999
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1000
			   sizeof(user_size)))
1001 1002
		return -EFAULT;

1003
	if (user_size != 0 && user_size != dev_size)
1004 1005 1006
		return -EINVAL;

	indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1007 1008 1009
	if (!indir)
		return -ENOMEM;

1010
	rx_rings.cmd = ETHTOOL_GRXRINGS;
1011
	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1012 1013
	if (ret)
		goto out;
1014 1015 1016 1017 1018

	if (user_size == 0) {
		for (i = 0; i < dev_size; i++)
			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
	} else {
1019 1020 1021 1022 1023 1024 1025 1026
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + ringidx_offset,
						  &rx_rings,
						  dev_size);
		if (ret)
			goto out;
	}

1027
	ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1028 1029 1030 1031 1032 1033 1034 1035
	if (ret)
		goto out;

	/* indicate whether rxfh was set to default */
	if (user_size == 0)
		dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
	else
		dev->priv_flags |= IFF_RXFH_CONFIGURED;
1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046

out:
	kfree(indir);
	return ret;
}

static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
					       void __user *useraddr)
{
	int ret;
	const struct ethtool_ops *ops = dev->ethtool_ops;
1047
	u32 user_indir_size, user_key_size;
1048
	u32 dev_indir_size = 0, dev_key_size = 0;
1049
	struct ethtool_rxfh rxfh;
1050
	u32 total_size;
1051
	u32 indir_bytes;
1052
	u32 *indir = NULL;
1053
	u8 dev_hfunc = 0;
1054 1055 1056
	u8 *hkey = NULL;
	u8 *rss_config;

1057
	if (!ops->get_rxfh)
1058 1059 1060 1061 1062 1063 1064
		return -EOPNOTSUPP;

	if (ops->get_rxfh_indir_size)
		dev_indir_size = ops->get_rxfh_indir_size(dev);
	if (ops->get_rxfh_key_size)
		dev_key_size = ops->get_rxfh_key_size(dev);

1065
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1066
		return -EFAULT;
1067 1068
	user_indir_size = rxfh.indir_size;
	user_key_size = rxfh.key_size;
1069

1070
	/* Check that reserved fields are 0 for now */
1071
	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1072
		return -EINVAL;
1073 1074 1075
	/* Most drivers don't handle rss_context, check it's 0 as well */
	if (rxfh.rss_context && !ops->get_rxfh_context)
		return -EOPNOTSUPP;
1076 1077 1078 1079

	rxfh.indir_size = dev_indir_size;
	rxfh.key_size = dev_key_size;
	if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
		return -EFAULT;

	if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
	    (user_key_size && (user_key_size != dev_key_size)))
		return -EINVAL;

	indir_bytes = user_indir_size * sizeof(indir[0]);
	total_size = indir_bytes + user_key_size;
	rss_config = kzalloc(total_size, GFP_USER);
	if (!rss_config)
		return -ENOMEM;

	if (user_indir_size)
		indir = (u32 *)rss_config;

	if (user_key_size)
		hkey = rss_config + indir_bytes;

1098 1099 1100 1101 1102 1103
	if (rxfh.rss_context)
		ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
							 &dev_hfunc,
							 rxfh.rss_context);
	else
		ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1104 1105
	if (ret)
		goto out;
1106

1107 1108 1109 1110 1111 1112 1113 1114 1115
	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
			 &dev_hfunc, sizeof(rxfh.hfunc))) {
		ret = -EFAULT;
	} else if (copy_to_user(useraddr +
			      offsetof(struct ethtool_rxfh, rss_config[0]),
			      rss_config, total_size)) {
		ret = -EFAULT;
	}
out:
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
	kfree(rss_config);

	return ret;
}

static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
					       void __user *useraddr)
{
	int ret;
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct ethtool_rxnfc rx_rings;
1127 1128
	struct ethtool_rxfh rxfh;
	u32 dev_indir_size = 0, dev_key_size = 0, i;
1129 1130 1131 1132
	u32 *indir = NULL, indir_bytes = 0;
	u8 *hkey = NULL;
	u8 *rss_config;
	u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1133
	bool delete = false;
1134

1135
	if (!ops->get_rxnfc || !ops->set_rxfh)
1136 1137 1138 1139 1140
		return -EOPNOTSUPP;

	if (ops->get_rxfh_indir_size)
		dev_indir_size = ops->get_rxfh_indir_size(dev);
	if (ops->get_rxfh_key_size)
1141
		dev_key_size = ops->get_rxfh_key_size(dev);
1142

1143
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1144 1145
		return -EFAULT;

1146
	/* Check that reserved fields are 0 for now */
1147
	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1148
		return -EINVAL;
1149 1150 1151
	/* Most drivers don't handle rss_context, check it's 0 as well */
	if (rxfh.rss_context && !ops->set_rxfh_context)
		return -EOPNOTSUPP;
1152

1153 1154
	/* If either indir, hash key or function is valid, proceed further.
	 * Must request at least one change: indir size, hash key or function.
1155
	 */
1156 1157 1158 1159 1160
	if ((rxfh.indir_size &&
	     rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
	     rxfh.indir_size != dev_indir_size) ||
	    (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
	    (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1161
	     rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1162 1163
		return -EINVAL;

1164
	if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1165 1166
		indir_bytes = dev_indir_size * sizeof(indir[0]);

1167
	rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1168 1169 1170 1171 1172 1173 1174 1175
	if (!rss_config)
		return -ENOMEM;

	rx_rings.cmd = ETHTOOL_GRXRINGS;
	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
	if (ret)
		goto out;

1176 1177
	/* rxfh.indir_size == 0 means reset the indir table to default (master
	 * context) or delete the context (other RSS contexts).
1178
	 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1179
	 */
1180 1181
	if (rxfh.indir_size &&
	    rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1182 1183 1184 1185
		indir = (u32 *)rss_config;
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + rss_cfg_offset,
						  &rx_rings,
1186
						  rxfh.indir_size);
1187
		if (ret)
1188
			goto out;
1189
	} else if (rxfh.indir_size == 0) {
1190 1191 1192 1193 1194 1195 1196
		if (rxfh.rss_context == 0) {
			indir = (u32 *)rss_config;
			for (i = 0; i < dev_indir_size; i++)
				indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
		} else {
			delete = true;
		}
1197
	}
1198

1199
	if (rxfh.key_size) {
1200 1201 1202
		hkey = rss_config + indir_bytes;
		if (copy_from_user(hkey,
				   useraddr + rss_cfg_offset + indir_bytes,
1203
				   rxfh.key_size)) {
1204 1205
			ret = -EFAULT;
			goto out;
1206
		}
1207 1208
	}

1209 1210 1211 1212 1213
	if (rxfh.rss_context)
		ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
					    &rxfh.rss_context, delete);
	else
		ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1214 1215 1216
	if (ret)
		goto out;

1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
			 &rxfh.rss_context, sizeof(rxfh.rss_context)))
		ret = -EFAULT;

	if (!rxfh.rss_context) {
		/* indicate whether rxfh was set to default */
		if (rxfh.indir_size == 0)
			dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
		else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
			dev->priv_flags |= IFF_RXFH_CONFIGURED;
	}
1228 1229

out:
1230
	kfree(rss_config);
1231 1232 1233
	return ret;
}

L
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static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_regs regs;
1237
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
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1238 1239 1240 1241 1242 1243 1244 1245 1246 1247
	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);
1248 1249 1250
	if (reglen <= 0)
		return reglen;

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1251 1252 1253
	if (regs.len > reglen)
		regs.len = reglen;

1254 1255 1256
	regbuf = vzalloc(reglen);
	if (!regbuf)
		return -ENOMEM;
L
Linus Torvalds 已提交
1257

1258 1259 1260
	if (regs.len < reglen)
		reglen = regs.len;

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1261 1262 1263 1264 1265 1266
	ops->get_regs(dev, &regs, regbuf);

	ret = -EFAULT;
	if (copy_to_user(useraddr, &regs, sizeof(regs)))
		goto out;
	useraddr += offsetof(struct ethtool_regs, data);
1267
	if (copy_to_user(useraddr, regbuf, reglen))
L
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1268 1269 1270 1271
		goto out;
	ret = 0;

 out:
1272
	vfree(regbuf);
L
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1273 1274 1275
	return ret;
}

B
Ben Hutchings 已提交
1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295
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
1296 1297
static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
1298
	struct ethtool_wolinfo wol;
L
Linus Torvalds 已提交
1299 1300 1301 1302

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

1303 1304
	memset(&wol, 0, sizeof(struct ethtool_wolinfo));
	wol.cmd = ETHTOOL_GWOL;
L
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1305 1306 1307 1308 1309 1310 1311 1312 1313 1314
	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;
1315
	int ret;
L
Linus Torvalds 已提交
1316 1317 1318 1319 1320 1321 1322

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

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

1323 1324 1325 1326 1327
	ret = dev->ethtool_ops->set_wol(dev, &wol);
	if (ret)
		return ret;

	dev->wol_enabled = !!wol.wolopts;
1328
	ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1329 1330

	return 0;
L
Linus Torvalds 已提交
1331 1332
}

1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_eee edata;
	int rc;

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

	memset(&edata, 0, sizeof(struct ethtool_eee));
	edata.cmd = ETHTOOL_GEEE;
	rc = dev->ethtool_ops->get_eee(dev, &edata);

	if (rc)
		return rc;

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

	return 0;
}

static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_eee edata;

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

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

	return dev->ethtool_ops->set_eee(dev, &edata);
}

L
Linus Torvalds 已提交
1367 1368 1369 1370 1371 1372 1373 1374
static int ethtool_nway_reset(struct net_device *dev)
{
	if (!dev->ethtool_ops->nway_reset)
		return -EOPNOTSUPP;

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

1375 1376 1377
static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1378
	int link = __ethtool_get_link(dev);
1379

1380 1381
	if (link < 0)
		return link;
1382

1383
	edata.data = link;
1384 1385 1386 1387 1388
	if (copy_to_user(useraddr, &edata, sizeof(edata)))
		return -EFAULT;
	return 0;
}

1389 1390 1391 1392
static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
				  int (*getter)(struct net_device *,
						struct ethtool_eeprom *, u8 *),
				  u32 total_len)
L
Linus Torvalds 已提交
1393 1394
{
	struct ethtool_eeprom eeprom;
1395 1396
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
1397
	u8 *data;
1398
	int ret = 0;
L
Linus Torvalds 已提交
1399 1400 1401 1402 1403 1404 1405 1406 1407

	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 */
1408
	if (eeprom.offset + eeprom.len > total_len)
L
Linus Torvalds 已提交
1409 1410
		return -EINVAL;

1411
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
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	if (!data)
		return -ENOMEM;

1415 1416 1417 1418
	bytes_remaining = eeprom.len;
	while (bytes_remaining > 0) {
		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

1419
		ret = getter(dev, &eeprom, data);
1420 1421 1422 1423 1424 1425 1426 1427 1428 1429
		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
1430

1431 1432 1433 1434 1435
	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
1436 1437 1438 1439
	kfree(data);
	return ret;
}

1440 1441 1442 1443
static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

1444 1445
	if (!ops->get_eeprom || !ops->get_eeprom_len ||
	    !ops->get_eeprom_len(dev))
1446 1447 1448 1449 1450 1451
		return -EOPNOTSUPP;

	return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
				      ops->get_eeprom_len(dev));
}

L
Linus Torvalds 已提交
1452 1453 1454
static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
1455
	const struct ethtool_ops *ops = dev->ethtool_ops;
1456 1457
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
1458
	u8 *data;
1459
	int ret = 0;
L
Linus Torvalds 已提交
1460

1461 1462
	if (!ops->set_eeprom || !ops->get_eeprom_len ||
	    !ops->get_eeprom_len(dev))
L
Linus Torvalds 已提交
1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475
		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;

1476
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
1477 1478 1479
	if (!data)
		return -ENOMEM;

1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
	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
1495 1496 1497 1498 1499

	kfree(data);
	return ret;
}

1500 1501
static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1502
{
1503
	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
L
Linus Torvalds 已提交
1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514

	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;
}

1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569
static bool
ethtool_set_coalesce_supported(struct net_device *dev,
			       struct ethtool_coalesce *coalesce)
{
	u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
	u32 nonzero_params = 0;

	if (coalesce->rx_coalesce_usecs)
		nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
	if (coalesce->rx_max_coalesced_frames)
		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
	if (coalesce->rx_coalesce_usecs_irq)
		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
	if (coalesce->rx_max_coalesced_frames_irq)
		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
	if (coalesce->tx_coalesce_usecs)
		nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
	if (coalesce->tx_max_coalesced_frames)
		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
	if (coalesce->tx_coalesce_usecs_irq)
		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
	if (coalesce->tx_max_coalesced_frames_irq)
		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
	if (coalesce->stats_block_coalesce_usecs)
		nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
	if (coalesce->use_adaptive_rx_coalesce)
		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
	if (coalesce->use_adaptive_tx_coalesce)
		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
	if (coalesce->pkt_rate_low)
		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
	if (coalesce->rx_coalesce_usecs_low)
		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
	if (coalesce->rx_max_coalesced_frames_low)
		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
	if (coalesce->tx_coalesce_usecs_low)
		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
	if (coalesce->tx_max_coalesced_frames_low)
		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
	if (coalesce->pkt_rate_high)
		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
	if (coalesce->rx_coalesce_usecs_high)
		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
	if (coalesce->rx_max_coalesced_frames_high)
		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
	if (coalesce->tx_coalesce_usecs_high)
		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
	if (coalesce->tx_max_coalesced_frames_high)
		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
	if (coalesce->rate_sample_interval)
		nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;

	return (supported_params & nonzero_params) == nonzero_params;
}

1570 1571
static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1572 1573 1574
{
	struct ethtool_coalesce coalesce;

1575
	if (!dev->ethtool_ops->set_coalesce)
L
Linus Torvalds 已提交
1576 1577 1578 1579 1580
		return -EOPNOTSUPP;

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

1581 1582 1583
	if (!ethtool_set_coalesce_supported(dev, &coalesce))
		return -EOPNOTSUPP;

L
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1584 1585 1586 1587 1588
	return dev->ethtool_ops->set_coalesce(dev, &coalesce);
}

static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
{
1589
	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
L
Linus Torvalds 已提交
1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602

	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)
{
1603
	struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1604
	int ret;
L
Linus Torvalds 已提交
1605

1606
	if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
L
Linus Torvalds 已提交
1607 1608 1609 1610 1611
		return -EOPNOTSUPP;

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

1612 1613 1614 1615 1616 1617 1618 1619 1620
	dev->ethtool_ops->get_ringparam(dev, &max);

	/* ensure new ring parameters are within the maximums */
	if (ringparam.rx_pending > max.rx_max_pending ||
	    ringparam.rx_mini_pending > max.rx_mini_max_pending ||
	    ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
	    ringparam.tx_pending > max.tx_max_pending)
		return -EINVAL;

1621 1622 1623 1624
	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
	if (!ret)
		ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
	return ret;
L
Linus Torvalds 已提交
1625 1626
}

1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644
static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
						   void __user *useraddr)
{
	struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };

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

	dev->ethtool_ops->get_channels(dev, &channels);

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

static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
						   void __user *useraddr)
{
1645
	struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1646
	u16 from_channel, to_channel;
1647
	u32 max_rx_in_use = 0;
1648
	unsigned int i;
1649
	int ret;
1650

1651
	if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1652 1653 1654 1655 1656
		return -EOPNOTSUPP;

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

1657
	dev->ethtool_ops->get_channels(dev, &curr);
1658 1659

	/* ensure new counts are within the maximums */
1660 1661 1662 1663
	if (channels.rx_count > curr.max_rx ||
	    channels.tx_count > curr.max_tx ||
	    channels.combined_count > curr.max_combined ||
	    channels.other_count > curr.max_other)
1664 1665
		return -EINVAL;

1666 1667 1668 1669 1670 1671 1672
	/* ensure the new Rx count fits within the configured Rx flow
	 * indirection table settings */
	if (netif_is_rxfh_configured(dev) &&
	    !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
	    (channels.combined_count + channels.rx_count) <= max_rx_in_use)
	    return -EINVAL;

1673 1674 1675 1676 1677 1678 1679 1680
	/* Disabling channels, query zero-copy AF_XDP sockets */
	from_channel = channels.combined_count +
		min(channels.rx_count, channels.tx_count);
	to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
	for (i = from_channel; i < to_channel; i++)
		if (xdp_get_umem_from_qid(dev, i))
			return -EINVAL;

1681 1682 1683 1684
	ret = dev->ethtool_ops->set_channels(dev, &channels);
	if (!ret)
		ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
	return ret;
1685 1686
}

L
Linus Torvalds 已提交
1687 1688
static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
{
1689
	struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
L
Linus Torvalds 已提交
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704

	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;

1705
	if (!dev->ethtool_ops->set_pauseparam)
L
Linus Torvalds 已提交
1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
		return -EOPNOTSUPP;

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

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

static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_test test;
1717
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1718
	u64 *data;
1719
	int ret, test_len;
L
Linus Torvalds 已提交
1720

1721
	if (!ops->self_test || !ops->get_sset_count)
L
Linus Torvalds 已提交
1722 1723
		return -EOPNOTSUPP;

1724
	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1725 1726 1727 1728
	if (test_len < 0)
		return test_len;
	WARN_ON(test_len == 0);

L
Linus Torvalds 已提交
1729 1730 1731
	if (copy_from_user(&test, useraddr, sizeof(test)))
		return -EFAULT;

1732
	test.len = test_len;
1733
	data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
L
Linus Torvalds 已提交
1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760
	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;
	u8 *data;
	int ret;

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

1761
	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1762 1763
	if (ret < 0)
		return ret;
1764 1765 1766
	if (ret > S32_MAX / ETH_GSTRING_LEN)
		return -ENOMEM;
	WARN_ON_ONCE(!ret);
1767 1768

	gstrings.len = ret;
L
Linus Torvalds 已提交
1769

1770 1771 1772 1773 1774 1775 1776 1777 1778
	if (gstrings.len) {
		data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
		if (!data)
			return -ENOMEM;

		__ethtool_get_strings(dev, gstrings.string_set, data);
	} else {
		data = NULL;
	}
L
Linus Torvalds 已提交
1779 1780 1781 1782 1783

	ret = -EFAULT;
	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
		goto out;
	useraddr += sizeof(gstrings);
1784 1785
	if (gstrings.len &&
	    copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
L
Linus Torvalds 已提交
1786 1787 1788
		goto out;
	ret = 0;

1789
out:
1790
	vfree(data);
L
Linus Torvalds 已提交
1791 1792 1793 1794 1795 1796
	return ret;
}

static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_value id;
1797
	static bool busy;
1798
	const struct ethtool_ops *ops = dev->ethtool_ops;
1799
	int rc;
L
Linus Torvalds 已提交
1800

1801
	if (!ops->set_phys_id)
L
Linus Torvalds 已提交
1802 1803
		return -EOPNOTSUPP;

1804 1805 1806
	if (busy)
		return -EBUSY;

L
Linus Torvalds 已提交
1807 1808 1809
	if (copy_from_user(&id, useraddr, sizeof(id)))
		return -EFAULT;

1810
	rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1811
	if (rc < 0)
1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823
		return rc;

	/* Drop the RTNL lock while waiting, but prevent reentry or
	 * removal of the device.
	 */
	busy = true;
	dev_hold(dev);
	rtnl_unlock();

	if (rc == 0) {
		/* Driver will handle this itself */
		schedule_timeout_interruptible(
1824
			id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1825
	} else {
1826 1827 1828 1829
		/* Driver expects to be called at twice the frequency in rc */
		int n = rc * 2, i, interval = HZ / n;

		/* Count down seconds */
1830
		do {
1831 1832 1833 1834
			/* Count down iterations per second */
			i = n;
			do {
				rtnl_lock();
1835
				rc = ops->set_phys_id(dev,
1836 1837 1838 1839 1840 1841
				    (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
				rtnl_unlock();
				if (rc)
					break;
				schedule_timeout_interruptible(interval);
			} while (!signal_pending(current) && --i != 0);
1842 1843 1844 1845 1846 1847 1848 1849
		} while (!signal_pending(current) &&
			 (id.data == 0 || --id.data != 0));
	}

	rtnl_lock();
	dev_put(dev);
	busy = false;

1850
	(void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1851
	return rc;
L
Linus Torvalds 已提交
1852 1853 1854 1855 1856
}

static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_stats stats;
1857
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1858
	u64 *data;
1859
	int ret, n_stats;
L
Linus Torvalds 已提交
1860

1861
	if (!ops->get_ethtool_stats || !ops->get_sset_count)
L
Linus Torvalds 已提交
1862 1863
		return -EOPNOTSUPP;

1864
	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1865 1866
	if (n_stats < 0)
		return n_stats;
1867 1868 1869
	if (n_stats > S32_MAX / sizeof(u64))
		return -ENOMEM;
	WARN_ON_ONCE(!n_stats);
L
Linus Torvalds 已提交
1870 1871 1872
	if (copy_from_user(&stats, useraddr, sizeof(stats)))
		return -EFAULT;

1873
	stats.n_stats = n_stats;
L
Linus Torvalds 已提交
1874

1875 1876 1877 1878 1879 1880 1881 1882
	if (n_stats) {
		data = vzalloc(array_size(n_stats, sizeof(u64)));
		if (!data)
			return -ENOMEM;
		ops->get_ethtool_stats(dev, &stats, data);
	} else {
		data = NULL;
	}
L
Linus Torvalds 已提交
1883 1884 1885 1886 1887

	ret = -EFAULT;
	if (copy_to_user(useraddr, &stats, sizeof(stats)))
		goto out;
	useraddr += sizeof(stats);
1888
	if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
L
Linus Torvalds 已提交
1889 1890 1891 1892
		goto out;
	ret = 0;

 out:
1893
	vfree(data);
L
Linus Torvalds 已提交
1894 1895 1896
	return ret;
}

A
Andrew Lunn 已提交
1897 1898
static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
{
1899
	const struct ethtool_ops *ops = dev->ethtool_ops;
A
Andrew Lunn 已提交
1900
	struct phy_device *phydev = dev->phydev;
1901
	struct ethtool_stats stats;
A
Andrew Lunn 已提交
1902 1903 1904
	u64 *data;
	int ret, n_stats;

1905
	if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
A
Andrew Lunn 已提交
1906 1907
		return -EOPNOTSUPP;

1908 1909 1910 1911
	if (dev->phydev && !ops->get_ethtool_phy_stats)
		n_stats = phy_ethtool_get_sset_count(dev->phydev);
	else
		n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
A
Andrew Lunn 已提交
1912 1913
	if (n_stats < 0)
		return n_stats;
1914 1915 1916
	if (n_stats > S32_MAX / sizeof(u64))
		return -ENOMEM;
	WARN_ON_ONCE(!n_stats);
A
Andrew Lunn 已提交
1917 1918 1919 1920 1921 1922

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

	stats.n_stats = n_stats;

1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934
	if (n_stats) {
		data = vzalloc(array_size(n_stats, sizeof(u64)));
		if (!data)
			return -ENOMEM;

		if (dev->phydev && !ops->get_ethtool_phy_stats) {
			ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
			if (ret < 0)
				goto out;
		} else {
			ops->get_ethtool_phy_stats(dev, &stats, data);
		}
1935
	} else {
1936
		data = NULL;
1937
	}
A
Andrew Lunn 已提交
1938 1939 1940 1941 1942

	ret = -EFAULT;
	if (copy_to_user(useraddr, &stats, sizeof(stats)))
		goto out;
	useraddr += sizeof(stats);
1943
	if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
A
Andrew Lunn 已提交
1944 1945 1946 1947
		goto out;
	ret = 0;

 out:
1948
	vfree(data);
A
Andrew Lunn 已提交
1949 1950 1951
	return ret;
}

1952
static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1953 1954 1955
{
	struct ethtool_perm_addr epaddr;

1956
	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1957 1958
		return -EFAULT;

1959 1960 1961
	if (epaddr.size < dev->addr_len)
		return -ETOOSMALL;
	epaddr.size = dev->addr_len;
1962 1963

	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1964
		return -EFAULT;
1965
	useraddr += sizeof(epaddr);
1966 1967 1968
	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
		return -EFAULT;
	return 0;
1969 1970
}

1971 1972
static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
			     u32 cmd, u32 (*actor)(struct net_device *))
1973
{
1974
	struct ethtool_value edata = { .cmd = cmd };
1975

1976
	if (!actor)
1977 1978
		return -EOPNOTSUPP;

1979
	edata.data = actor(dev);
1980 1981 1982 1983 1984 1985

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

1986 1987
static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
			     void (*actor)(struct net_device *, u32))
1988 1989 1990
{
	struct ethtool_value edata;

1991
	if (!actor)
1992 1993 1994 1995 1996
		return -EOPNOTSUPP;

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

1997
	actor(dev, edata.data);
1998 1999 2000
	return 0;
}

2001 2002
static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
			     int (*actor)(struct net_device *, u32))
2003 2004 2005
{
	struct ethtool_value edata;

2006
	if (!actor)
2007 2008 2009 2010 2011
		return -EOPNOTSUPP;

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

2012
	return actor(dev, edata.data);
2013 2014
}

2015 2016
static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
						   char __user *useraddr)
2017 2018 2019 2020 2021
{
	struct ethtool_flash efl;

	if (copy_from_user(&efl, useraddr, sizeof(efl)))
		return -EFAULT;
2022
	efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2023

2024 2025
	if (!dev->ethtool_ops->flash_device)
		return devlink_compat_flash_update(dev, efl.data);
2026

2027 2028 2029
	return dev->ethtool_ops->flash_device(dev, &efl);
}

2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050
static int ethtool_set_dump(struct net_device *dev,
			void __user *useraddr)
{
	struct ethtool_dump dump;

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

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

	return dev->ethtool_ops->set_dump(dev, &dump);
}

static int ethtool_get_dump_flag(struct net_device *dev,
				void __user *useraddr)
{
	int ret;
	struct ethtool_dump dump;
	const struct ethtool_ops *ops = dev->ethtool_ops;

2051
	if (!ops->get_dump_flag)
2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
		return -EOPNOTSUPP;

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

	ret = ops->get_dump_flag(dev, &dump);
	if (ret)
		return ret;

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

static int ethtool_get_dump_data(struct net_device *dev,
				void __user *useraddr)
{
	int ret;
	__u32 len;
	struct ethtool_dump dump, tmp;
	const struct ethtool_ops *ops = dev->ethtool_ops;
	void *data = NULL;

2075
	if (!ops->get_dump_data || !ops->get_dump_flag)
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086
		return -EOPNOTSUPP;

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

	memset(&tmp, 0, sizeof(tmp));
	tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
	ret = ops->get_dump_flag(dev, &tmp);
	if (ret)
		return ret;

2087
	len = min(tmp.len, dump.len);
2088 2089 2090
	if (!len)
		return -EFAULT;

2091 2092 2093 2094 2095 2096 2097 2098 2099
	/* Don't ever let the driver think there's more space available
	 * than it requested with .get_dump_flag().
	 */
	dump.len = len;

	/* Always allocate enough space to hold the whole thing so that the
	 * driver does not need to check the length and bother with partial
	 * dumping.
	 */
2100 2101 2102 2103 2104 2105 2106
	data = vzalloc(tmp.len);
	if (!data)
		return -ENOMEM;
	ret = ops->get_dump_data(dev, &dump, data);
	if (ret)
		goto out;

2107 2108 2109 2110 2111 2112 2113 2114 2115 2116
	/* There are two sane possibilities:
	 * 1. The driver's .get_dump_data() does not touch dump.len.
	 * 2. Or it may set dump.len to how much it really writes, which
	 *    should be tmp.len (or len if it can do a partial dump).
	 * In any case respond to userspace with the actual length of data
	 * it's receiving.
	 */
	WARN_ON(dump.len != len && dump.len != tmp.len);
	dump.len = len;

2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
	if (copy_to_user(useraddr, &dump, sizeof(dump))) {
		ret = -EFAULT;
		goto out;
	}
	useraddr += offsetof(struct ethtool_dump, data);
	if (copy_to_user(useraddr, data, len))
		ret = -EFAULT;
out:
	vfree(data);
	return ret;
}

2129 2130 2131 2132 2133 2134 2135 2136 2137 2138
static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
{
	int err = 0;
	struct ethtool_ts_info info;
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct phy_device *phydev = dev->phydev;

	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GET_TS_INFO;

2139 2140
	if (phy_has_tsinfo(phydev)) {
		err = phy_ts_info(phydev, &info);
2141
	} else if (ops->get_ts_info) {
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158
		err = ops->get_ts_info(dev, &info);
	} else {
		info.so_timestamping =
			SOF_TIMESTAMPING_RX_SOFTWARE |
			SOF_TIMESTAMPING_SOFTWARE;
		info.phc_index = -1;
	}

	if (err)
		return err;

	if (copy_to_user(useraddr, &info, sizeof(info)))
		err = -EFAULT;

	return err;
}

2159 2160 2161 2162 2163 2164
static int __ethtool_get_module_info(struct net_device *dev,
				     struct ethtool_modinfo *modinfo)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct phy_device *phydev = dev->phydev;

2165 2166 2167
	if (dev->sfp_bus)
		return sfp_get_module_info(dev->sfp_bus, modinfo);

2168 2169 2170 2171 2172 2173 2174 2175 2176
	if (phydev && phydev->drv && phydev->drv->module_info)
		return phydev->drv->module_info(phydev, modinfo);

	if (ops->get_module_info)
		return ops->get_module_info(dev, modinfo);

	return -EOPNOTSUPP;
}

2177 2178 2179 2180 2181 2182 2183 2184 2185
static int ethtool_get_module_info(struct net_device *dev,
				   void __user *useraddr)
{
	int ret;
	struct ethtool_modinfo modinfo;

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

2186
	ret = __ethtool_get_module_info(dev, &modinfo);
2187 2188 2189 2190 2191 2192 2193 2194 2195
	if (ret)
		return ret;

	if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
		return -EFAULT;

	return 0;
}

2196 2197 2198 2199 2200 2201
static int __ethtool_get_module_eeprom(struct net_device *dev,
				       struct ethtool_eeprom *ee, u8 *data)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct phy_device *phydev = dev->phydev;

2202 2203 2204
	if (dev->sfp_bus)
		return sfp_get_module_eeprom(dev->sfp_bus, ee, data);

2205 2206 2207 2208 2209 2210 2211 2212 2213
	if (phydev && phydev->drv && phydev->drv->module_eeprom)
		return phydev->drv->module_eeprom(phydev, ee, data);

	if (ops->get_module_eeprom)
		return ops->get_module_eeprom(dev, ee, data);

	return -EOPNOTSUPP;
}

2214 2215 2216 2217 2218 2219
static int ethtool_get_module_eeprom(struct net_device *dev,
				     void __user *useraddr)
{
	int ret;
	struct ethtool_modinfo modinfo;

2220
	ret = __ethtool_get_module_info(dev, &modinfo);
2221 2222 2223
	if (ret)
		return ret;

2224 2225
	return ethtool_get_any_eeprom(dev, useraddr,
				      __ethtool_get_module_eeprom,
2226 2227 2228
				      modinfo.eeprom_len);
}

2229 2230 2231 2232
static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
{
	switch (tuna->id) {
	case ETHTOOL_RX_COPYBREAK:
2233
	case ETHTOOL_TX_COPYBREAK:
2234 2235 2236 2237
		if (tuna->len != sizeof(u32) ||
		    tuna->type_id != ETHTOOL_TUNABLE_U32)
			return -EINVAL;
		break;
2238 2239 2240 2241 2242
	case ETHTOOL_PFC_PREVENTION_TOUT:
		if (tuna->len != sizeof(u16) ||
		    tuna->type_id != ETHTOOL_TUNABLE_U16)
			return -EINVAL;
		break;
2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295
	default:
		return -EINVAL;
	}

	return 0;
}

static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
{
	int ret;
	struct ethtool_tunable tuna;
	const struct ethtool_ops *ops = dev->ethtool_ops;
	void *data;

	if (!ops->get_tunable)
		return -EOPNOTSUPP;
	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
		return -EFAULT;
	ret = ethtool_tunable_valid(&tuna);
	if (ret)
		return ret;
	data = kmalloc(tuna.len, GFP_USER);
	if (!data)
		return -ENOMEM;
	ret = ops->get_tunable(dev, &tuna, data);
	if (ret)
		goto out;
	useraddr += sizeof(tuna);
	ret = -EFAULT;
	if (copy_to_user(useraddr, data, tuna.len))
		goto out;
	ret = 0;

out:
	kfree(data);
	return ret;
}

static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
{
	int ret;
	struct ethtool_tunable tuna;
	const struct ethtool_ops *ops = dev->ethtool_ops;
	void *data;

	if (!ops->set_tunable)
		return -EOPNOTSUPP;
	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
		return -EFAULT;
	ret = ethtool_tunable_valid(&tuna);
	if (ret)
		return ret;
	useraddr += sizeof(tuna);
A
Al Viro 已提交
2296 2297 2298
	data = memdup_user(useraddr, tuna.len);
	if (IS_ERR(data))
		return PTR_ERR(data);
2299 2300 2301 2302 2303 2304
	ret = ops->set_tunable(dev, &tuna, data);

	kfree(data);
	return ret;
}

2305 2306 2307 2308
static noinline_for_stack int
ethtool_get_per_queue_coalesce(struct net_device *dev,
			       void __user *useraddr,
			       struct ethtool_per_queue_op *per_queue_opt)
2309 2310 2311 2312 2313 2314 2315 2316 2317 2318
{
	u32 bit;
	int ret;
	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);

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

	useraddr += sizeof(*per_queue_opt);

2319 2320
	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
			  MAX_NUM_QUEUE);
2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335

	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
		struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };

		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
		if (ret != 0)
			return ret;
		if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
			return -EFAULT;
		useraddr += sizeof(coalesce);
	}

	return 0;
}

2336 2337 2338 2339
static noinline_for_stack int
ethtool_set_per_queue_coalesce(struct net_device *dev,
			       void __user *useraddr,
			       struct ethtool_per_queue_op *per_queue_opt)
2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352
{
	u32 bit;
	int i, ret = 0;
	int n_queue;
	struct ethtool_coalesce *backup = NULL, *tmp = NULL;
	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);

	if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
	    (!dev->ethtool_ops->get_per_queue_coalesce))
		return -EOPNOTSUPP;

	useraddr += sizeof(*per_queue_opt);

2353
	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372
	n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
	tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
	if (!backup)
		return -ENOMEM;

	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
		struct ethtool_coalesce coalesce;

		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
		if (ret != 0)
			goto roll_back;

		tmp++;

		if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
			ret = -EFAULT;
			goto roll_back;
		}

2373 2374 2375 2376 2377
		if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
			ret = -EOPNOTSUPP;
			goto roll_back;
		}

2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397
		ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
		if (ret != 0)
			goto roll_back;

		useraddr += sizeof(coalesce);
	}

roll_back:
	if (ret != 0) {
		tmp = backup;
		for_each_set_bit(i, queue_mask, bit) {
			dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
			tmp++;
		}
	}
	kfree(backup);

	return ret;
}

2398
static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2399
				 void __user *useraddr, u32 sub_cmd)
2400 2401 2402 2403 2404 2405
{
	struct ethtool_per_queue_op per_queue_opt;

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

2406 2407 2408
	if (per_queue_opt.sub_command != sub_cmd)
		return -EINVAL;

2409
	switch (per_queue_opt.sub_command) {
2410 2411
	case ETHTOOL_GCOALESCE:
		return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2412 2413
	case ETHTOOL_SCOALESCE:
		return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2414 2415 2416 2417 2418
	default:
		return -EOPNOTSUPP;
	};
}

2419 2420 2421
static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
{
	switch (tuna->id) {
2422
	case ETHTOOL_PHY_DOWNSHIFT:
2423
	case ETHTOOL_PHY_FAST_LINK_DOWN:
2424 2425 2426 2427
		if (tuna->len != sizeof(u8) ||
		    tuna->type_id != ETHTOOL_TUNABLE_U8)
			return -EINVAL;
		break;
2428 2429 2430 2431 2432
	case ETHTOOL_PHY_EDPD:
		if (tuna->len != sizeof(u16) ||
		    tuna->type_id != ETHTOOL_TUNABLE_U16)
			return -EINVAL;
		break;
2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457
	default:
		return -EINVAL;
	}

	return 0;
}

static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
{
	int ret;
	struct ethtool_tunable tuna;
	struct phy_device *phydev = dev->phydev;
	void *data;

	if (!(phydev && phydev->drv && phydev->drv->get_tunable))
		return -EOPNOTSUPP;

	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
		return -EFAULT;
	ret = ethtool_phy_tunable_valid(&tuna);
	if (ret)
		return ret;
	data = kmalloc(tuna.len, GFP_USER);
	if (!data)
		return -ENOMEM;
2458
	mutex_lock(&phydev->lock);
2459
	ret = phydev->drv->get_tunable(phydev, &tuna, data);
2460
	mutex_unlock(&phydev->lock);
2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488
	if (ret)
		goto out;
	useraddr += sizeof(tuna);
	ret = -EFAULT;
	if (copy_to_user(useraddr, data, tuna.len))
		goto out;
	ret = 0;

out:
	kfree(data);
	return ret;
}

static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
{
	int ret;
	struct ethtool_tunable tuna;
	struct phy_device *phydev = dev->phydev;
	void *data;

	if (!(phydev && phydev->drv && phydev->drv->set_tunable))
		return -EOPNOTSUPP;
	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
		return -EFAULT;
	ret = ethtool_phy_tunable_valid(&tuna);
	if (ret)
		return ret;
	useraddr += sizeof(tuna);
A
Al Viro 已提交
2489 2490 2491
	data = memdup_user(useraddr, tuna.len);
	if (IS_ERR(data))
		return PTR_ERR(data);
2492
	mutex_lock(&phydev->lock);
2493
	ret = phydev->drv->set_tunable(phydev, &tuna, data);
2494
	mutex_unlock(&phydev->lock);
2495 2496 2497 2498 2499

	kfree(data);
	return ret;
}

2500 2501
static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
{
2502
	struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2503
	int rc;
2504 2505 2506 2507

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

2508 2509 2510
	rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
	if (rc)
		return rc;
2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529

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

static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_fecparam fecparam;

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

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

	return dev->ethtool_ops->set_fecparam(dev, &fecparam);
}

2530
/* The main entry point in this file.  Called from net/core/dev_ioctl.c */
L
Linus Torvalds 已提交
2531

2532
int dev_ethtool(struct net *net, struct ifreq *ifr)
L
Linus Torvalds 已提交
2533
{
2534
	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
L
Linus Torvalds 已提交
2535
	void __user *useraddr = ifr->ifr_data;
2536
	u32 ethcmd, sub_cmd;
L
Linus Torvalds 已提交
2537
	int rc;
2538
	netdev_features_t old_features;
L
Linus Torvalds 已提交
2539 2540 2541 2542

	if (!dev || !netif_device_present(dev))
		return -ENODEV;

2543
	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
L
Linus Torvalds 已提交
2544 2545
		return -EFAULT;

2546 2547 2548 2549 2550 2551
	if (ethcmd == ETHTOOL_PERQUEUE) {
		if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
			return -EFAULT;
	} else {
		sub_cmd = ethcmd;
	}
2552
	/* Allow some commands to be done by anyone */
2553
	switch (sub_cmd) {
2554
	case ETHTOOL_GSET:
2555 2556
	case ETHTOOL_GDRVINFO:
	case ETHTOOL_GMSGLVL:
2557
	case ETHTOOL_GLINK:
2558 2559 2560 2561 2562 2563
	case ETHTOOL_GCOALESCE:
	case ETHTOOL_GRINGPARAM:
	case ETHTOOL_GPAUSEPARAM:
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
	case ETHTOOL_GSG:
2564
	case ETHTOOL_GSSET_INFO:
2565
	case ETHTOOL_GSTRINGS:
2566
	case ETHTOOL_GSTATS:
A
Andrew Lunn 已提交
2567
	case ETHTOOL_GPHYSTATS:
2568 2569
	case ETHTOOL_GTSO:
	case ETHTOOL_GPERMADDR:
2570
	case ETHTOOL_GUFO:
2571
	case ETHTOOL_GGSO:
2572
	case ETHTOOL_GGRO:
2573 2574
	case ETHTOOL_GFLAGS:
	case ETHTOOL_GPFLAGS:
2575
	case ETHTOOL_GRXFH:
2576 2577 2578 2579
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
2580
	case ETHTOOL_GRXFHINDIR:
2581
	case ETHTOOL_GRSSH:
2582
	case ETHTOOL_GFEATURES:
2583
	case ETHTOOL_GCHANNELS:
2584
	case ETHTOOL_GET_TS_INFO:
2585
	case ETHTOOL_GEEE:
2586
	case ETHTOOL_GTUNABLE:
2587
	case ETHTOOL_PHY_GTUNABLE:
2588
	case ETHTOOL_GLINKSETTINGS:
2589
	case ETHTOOL_GFECPARAM:
2590 2591
		break;
	default:
2592
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2593 2594 2595
			return -EPERM;
	}

2596 2597 2598
	if (dev->ethtool_ops->begin) {
		rc = dev->ethtool_ops->begin(dev);
		if (rc  < 0)
L
Linus Torvalds 已提交
2599
			return rc;
2600
	}
2601 2602
	old_features = dev->features;

L
Linus Torvalds 已提交
2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622
	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:
2623 2624
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_msglevel);
L
Linus Torvalds 已提交
2625 2626
		break;
	case ETHTOOL_SMSGLVL:
2627 2628
		rc = ethtool_set_value_void(dev, useraddr,
				       dev->ethtool_ops->set_msglevel);
2629 2630
		if (!rc)
			ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
L
Linus Torvalds 已提交
2631
		break;
2632 2633 2634 2635 2636 2637
	case ETHTOOL_GEEE:
		rc = ethtool_get_eee(dev, useraddr);
		break;
	case ETHTOOL_SEEE:
		rc = ethtool_set_eee(dev, useraddr);
		break;
L
Linus Torvalds 已提交
2638 2639 2640 2641
	case ETHTOOL_NWAY_RST:
		rc = ethtool_nway_reset(dev);
		break;
	case ETHTOOL_GLINK:
2642
		rc = ethtool_get_link(dev, useraddr);
L
Linus Torvalds 已提交
2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679
		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_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;
2680 2681 2682
	case ETHTOOL_GPERMADDR:
		rc = ethtool_get_perm_addr(dev, useraddr);
		break;
2683
	case ETHTOOL_GFLAGS:
2684
		rc = ethtool_get_value(dev, useraddr, ethcmd,
M
Michał Mirosław 已提交
2685
					__ethtool_get_flags);
2686 2687
		break;
	case ETHTOOL_SFLAGS:
2688
		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2689
		break;
2690
	case ETHTOOL_GPFLAGS:
2691 2692
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_priv_flags);
2693 2694
		if (!rc)
			ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2695 2696
		break;
	case ETHTOOL_SPFLAGS:
2697 2698
		rc = ethtool_set_value(dev, useraddr,
				       dev->ethtool_ops->set_priv_flags);
2699
		break;
2700
	case ETHTOOL_GRXFH:
2701 2702 2703 2704
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
2705
		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2706 2707
		break;
	case ETHTOOL_SRXFH:
2708 2709
	case ETHTOOL_SRXCLSRLDEL:
	case ETHTOOL_SRXCLSRLINS:
2710
		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2711
		break;
2712 2713 2714
	case ETHTOOL_FLASHDEV:
		rc = ethtool_flash_device(dev, useraddr);
		break;
B
Ben Hutchings 已提交
2715 2716 2717
	case ETHTOOL_RESET:
		rc = ethtool_reset(dev, useraddr);
		break;
2718 2719 2720
	case ETHTOOL_GSSET_INFO:
		rc = ethtool_get_sset_info(dev, useraddr);
		break;
2721 2722 2723 2724 2725 2726
	case ETHTOOL_GRXFHINDIR:
		rc = ethtool_get_rxfh_indir(dev, useraddr);
		break;
	case ETHTOOL_SRXFHINDIR:
		rc = ethtool_set_rxfh_indir(dev, useraddr);
		break;
2727 2728 2729 2730 2731 2732
	case ETHTOOL_GRSSH:
		rc = ethtool_get_rxfh(dev, useraddr);
		break;
	case ETHTOOL_SRSSH:
		rc = ethtool_set_rxfh(dev, useraddr);
		break;
2733 2734 2735 2736 2737 2738
	case ETHTOOL_GFEATURES:
		rc = ethtool_get_features(dev, useraddr);
		break;
	case ETHTOOL_SFEATURES:
		rc = ethtool_set_features(dev, useraddr);
		break;
2739
	case ETHTOOL_GTXCSUM:
2740
	case ETHTOOL_GRXCSUM:
2741 2742 2743 2744 2745 2746 2747
	case ETHTOOL_GSG:
	case ETHTOOL_GTSO:
	case ETHTOOL_GGSO:
	case ETHTOOL_GGRO:
		rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
		break;
	case ETHTOOL_STXCSUM:
2748
	case ETHTOOL_SRXCSUM:
2749 2750 2751 2752 2753 2754
	case ETHTOOL_SSG:
	case ETHTOOL_STSO:
	case ETHTOOL_SGSO:
	case ETHTOOL_SGRO:
		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
		break;
2755 2756 2757 2758 2759 2760
	case ETHTOOL_GCHANNELS:
		rc = ethtool_get_channels(dev, useraddr);
		break;
	case ETHTOOL_SCHANNELS:
		rc = ethtool_set_channels(dev, useraddr);
		break;
2761 2762 2763 2764 2765 2766 2767 2768 2769
	case ETHTOOL_SET_DUMP:
		rc = ethtool_set_dump(dev, useraddr);
		break;
	case ETHTOOL_GET_DUMP_FLAG:
		rc = ethtool_get_dump_flag(dev, useraddr);
		break;
	case ETHTOOL_GET_DUMP_DATA:
		rc = ethtool_get_dump_data(dev, useraddr);
		break;
2770 2771 2772
	case ETHTOOL_GET_TS_INFO:
		rc = ethtool_get_ts_info(dev, useraddr);
		break;
2773 2774 2775 2776 2777 2778
	case ETHTOOL_GMODULEINFO:
		rc = ethtool_get_module_info(dev, useraddr);
		break;
	case ETHTOOL_GMODULEEEPROM:
		rc = ethtool_get_module_eeprom(dev, useraddr);
		break;
2779 2780 2781 2782 2783 2784
	case ETHTOOL_GTUNABLE:
		rc = ethtool_get_tunable(dev, useraddr);
		break;
	case ETHTOOL_STUNABLE:
		rc = ethtool_set_tunable(dev, useraddr);
		break;
A
Andrew Lunn 已提交
2785 2786 2787
	case ETHTOOL_GPHYSTATS:
		rc = ethtool_get_phy_stats(dev, useraddr);
		break;
2788
	case ETHTOOL_PERQUEUE:
2789
		rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2790
		break;
2791 2792 2793 2794 2795 2796
	case ETHTOOL_GLINKSETTINGS:
		rc = ethtool_get_link_ksettings(dev, useraddr);
		break;
	case ETHTOOL_SLINKSETTINGS:
		rc = ethtool_set_link_ksettings(dev, useraddr);
		break;
2797 2798 2799 2800 2801 2802
	case ETHTOOL_PHY_GTUNABLE:
		rc = get_phy_tunable(dev, useraddr);
		break;
	case ETHTOOL_PHY_STUNABLE:
		rc = set_phy_tunable(dev, useraddr);
		break;
2803 2804 2805 2806 2807 2808
	case ETHTOOL_GFECPARAM:
		rc = ethtool_get_fecparam(dev, useraddr);
		break;
	case ETHTOOL_SFECPARAM:
		rc = ethtool_set_fecparam(dev, useraddr);
		break;
L
Linus Torvalds 已提交
2809
	default:
2810
		rc = -EOPNOTSUPP;
L
Linus Torvalds 已提交
2811
	}
2812

2813
	if (dev->ethtool_ops->complete)
L
Linus Torvalds 已提交
2814
		dev->ethtool_ops->complete(dev);
2815 2816 2817 2818

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

L
Linus Torvalds 已提交
2819 2820
	return rc;
}
2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868

struct ethtool_rx_flow_key {
	struct flow_dissector_key_basic			basic;
	union {
		struct flow_dissector_key_ipv4_addrs	ipv4;
		struct flow_dissector_key_ipv6_addrs	ipv6;
	};
	struct flow_dissector_key_ports			tp;
	struct flow_dissector_key_ip			ip;
	struct flow_dissector_key_vlan			vlan;
	struct flow_dissector_key_eth_addrs		eth_addrs;
} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */

struct ethtool_rx_flow_match {
	struct flow_dissector		dissector;
	struct ethtool_rx_flow_key	key;
	struct ethtool_rx_flow_key	mask;
};

struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
{
	const struct ethtool_rx_flow_spec *fs = input->fs;
	static struct in6_addr zero_addr = {};
	struct ethtool_rx_flow_match *match;
	struct ethtool_rx_flow_rule *flow;
	struct flow_action_entry *act;

	flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
		       sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
	if (!flow)
		return ERR_PTR(-ENOMEM);

	/* ethtool_rx supports only one single action per rule. */
	flow->rule = flow_rule_alloc(1);
	if (!flow->rule) {
		kfree(flow);
		return ERR_PTR(-ENOMEM);
	}

	match = (struct ethtool_rx_flow_match *)flow->priv;
	flow->rule->match.dissector	= &match->dissector;
	flow->rule->match.mask		= &match->mask;
	flow->rule->match.key		= &match->key;

	match->mask.basic.n_proto = htons(0xffff);

	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
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	case ETHER_FLOW: {
		const struct ethhdr *ether_spec, *ether_m_spec;

		ether_spec = &fs->h_u.ether_spec;
		ether_m_spec = &fs->m_u.ether_spec;

		if (!is_zero_ether_addr(ether_m_spec->h_source)) {
			ether_addr_copy(match->key.eth_addrs.src,
					ether_spec->h_source);
			ether_addr_copy(match->mask.eth_addrs.src,
					ether_m_spec->h_source);
		}
		if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
			ether_addr_copy(match->key.eth_addrs.dst,
					ether_spec->h_dest);
			ether_addr_copy(match->mask.eth_addrs.dst,
					ether_m_spec->h_dest);
		}
		if (ether_m_spec->h_proto) {
			match->key.basic.n_proto = ether_spec->h_proto;
			match->mask.basic.n_proto = ether_m_spec->h_proto;
		}
		}
		break;
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	case TCP_V4_FLOW:
	case UDP_V4_FLOW: {
		const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;

		match->key.basic.n_proto = htons(ETH_P_IP);

		v4_spec = &fs->h_u.tcp_ip4_spec;
		v4_m_spec = &fs->m_u.tcp_ip4_spec;

		if (v4_m_spec->ip4src) {
			match->key.ipv4.src = v4_spec->ip4src;
			match->mask.ipv4.src = v4_m_spec->ip4src;
		}
		if (v4_m_spec->ip4dst) {
			match->key.ipv4.dst = v4_spec->ip4dst;
			match->mask.ipv4.dst = v4_m_spec->ip4dst;
		}
		if (v4_m_spec->ip4src ||
		    v4_m_spec->ip4dst) {
			match->dissector.used_keys |=
				BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
				offsetof(struct ethtool_rx_flow_key, ipv4);
		}
		if (v4_m_spec->psrc) {
			match->key.tp.src = v4_spec->psrc;
			match->mask.tp.src = v4_m_spec->psrc;
		}
		if (v4_m_spec->pdst) {
			match->key.tp.dst = v4_spec->pdst;
			match->mask.tp.dst = v4_m_spec->pdst;
		}
		if (v4_m_spec->psrc ||
		    v4_m_spec->pdst) {
			match->dissector.used_keys |=
				BIT(FLOW_DISSECTOR_KEY_PORTS);
			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
				offsetof(struct ethtool_rx_flow_key, tp);
		}
		if (v4_m_spec->tos) {
			match->key.ip.tos = v4_spec->tos;
			match->mask.ip.tos = v4_m_spec->tos;
			match->dissector.used_keys |=
				BIT(FLOW_DISSECTOR_KEY_IP);
			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
				offsetof(struct ethtool_rx_flow_key, ip);
		}
		}
		break;
	case TCP_V6_FLOW:
	case UDP_V6_FLOW: {
		const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;

		match->key.basic.n_proto = htons(ETH_P_IPV6);

		v6_spec = &fs->h_u.tcp_ip6_spec;
		v6_m_spec = &fs->m_u.tcp_ip6_spec;
		if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
			memcpy(&match->key.ipv6.src, v6_spec->ip6src,
			       sizeof(match->key.ipv6.src));
			memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
			       sizeof(match->mask.ipv6.src));
		}
		if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
			memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
			       sizeof(match->key.ipv6.dst));
			memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
			       sizeof(match->mask.ipv6.dst));
		}
		if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
		    memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
			match->dissector.used_keys |=
				BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
				offsetof(struct ethtool_rx_flow_key, ipv6);
		}
		if (v6_m_spec->psrc) {
			match->key.tp.src = v6_spec->psrc;
			match->mask.tp.src = v6_m_spec->psrc;
		}
		if (v6_m_spec->pdst) {
			match->key.tp.dst = v6_spec->pdst;
			match->mask.tp.dst = v6_m_spec->pdst;
		}
		if (v6_m_spec->psrc ||
		    v6_m_spec->pdst) {
			match->dissector.used_keys |=
				BIT(FLOW_DISSECTOR_KEY_PORTS);
			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
				offsetof(struct ethtool_rx_flow_key, tp);
		}
		if (v6_m_spec->tclass) {
			match->key.ip.tos = v6_spec->tclass;
			match->mask.ip.tos = v6_m_spec->tclass;
			match->dissector.used_keys |=
				BIT(FLOW_DISSECTOR_KEY_IP);
			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
				offsetof(struct ethtool_rx_flow_key, ip);
		}
		}
		break;
	default:
		ethtool_rx_flow_rule_destroy(flow);
		return ERR_PTR(-EINVAL);
	}

	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
	case TCP_V4_FLOW:
	case TCP_V6_FLOW:
		match->key.basic.ip_proto = IPPROTO_TCP;
		break;
	case UDP_V4_FLOW:
	case UDP_V6_FLOW:
		match->key.basic.ip_proto = IPPROTO_UDP;
		break;
	}
	match->mask.basic.ip_proto = 0xff;

	match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
	match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
		offsetof(struct ethtool_rx_flow_key, basic);

	if (fs->flow_type & FLOW_EXT) {
		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;

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		if (ext_m_spec->vlan_etype) {
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			match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
			match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
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		}
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		if (ext_m_spec->vlan_tci) {
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			match->key.vlan.vlan_id =
				ntohs(ext_h_spec->vlan_tci) & 0x0fff;
			match->mask.vlan.vlan_id =
				ntohs(ext_m_spec->vlan_tci) & 0x0fff;

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			match->key.vlan.vlan_dei =
				!!(ext_h_spec->vlan_tci & htons(0x1000));
			match->mask.vlan.vlan_dei =
				!!(ext_m_spec->vlan_tci & htons(0x1000));

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			match->key.vlan.vlan_priority =
				(ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
			match->mask.vlan.vlan_priority =
				(ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
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		}
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		if (ext_m_spec->vlan_etype ||
		    ext_m_spec->vlan_tci) {
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			match->dissector.used_keys |=
				BIT(FLOW_DISSECTOR_KEY_VLAN);
			match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
				offsetof(struct ethtool_rx_flow_key, vlan);
		}
	}
	if (fs->flow_type & FLOW_MAC_EXT) {
		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;

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		memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
		       ETH_ALEN);
		memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
		       ETH_ALEN);

		match->dissector.used_keys |=
			BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
		match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
			offsetof(struct ethtool_rx_flow_key, eth_addrs);
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	}

	act = &flow->rule->action.entries[0];
	switch (fs->ring_cookie) {
	case RX_CLS_FLOW_DISC:
		act->id = FLOW_ACTION_DROP;
		break;
	case RX_CLS_FLOW_WAKE:
		act->id = FLOW_ACTION_WAKE;
		break;
	default:
		act->id = FLOW_ACTION_QUEUE;
		if (fs->flow_type & FLOW_RSS)
			act->queue.ctx = input->rss_ctx;

		act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
		act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
		break;
	}

	return flow;
}
EXPORT_SYMBOL(ethtool_rx_flow_rule_create);

void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
{
	kfree(flow->rule);
	kfree(flow);
}
EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);