ethtool.c 67.9 KB
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/*
 * net/core/ethtool.c - Ethtool ioctl handler
 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
 *
 * This file is where we call all the ethtool_ops commands to get
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 * the information ethtool needs.
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 *
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 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
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 */

#include <linux/module.h>
#include <linux/types.h>
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#include <linux/capability.h>
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#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
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#include <linux/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/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
#include <linux/sched.h>
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#include <linux/net.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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#define ETHTOOL_DEV_FEATURE_WORDS	((NETDEV_FEATURE_COUNT + 31) / 32)
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static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
	[NETIF_F_SG_BIT] =               "tx-scatter-gather",
	[NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
	[NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
	[NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
	[NETIF_F_HIGHDMA_BIT] =          "highdma",
	[NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
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	[NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
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	[NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
	[NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
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	[NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
	[NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
	[NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
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	[NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
	[NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
	[NETIF_F_LLTX_BIT] =             "tx-lockless",
	[NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
	[NETIF_F_GRO_BIT] =              "rx-gro",
	[NETIF_F_LRO_BIT] =              "rx-lro",

	[NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
	[NETIF_F_UFO_BIT] =              "tx-udp-fragmentation",
	[NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
	[NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
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	[NETIF_F_TSO_MANGLEID_BIT] =	 "tx-tcp-mangleid-segmentation",
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	[NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
	[NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
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	[NETIF_F_GSO_GRE_BIT] =		 "tx-gre-segmentation",
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	[NETIF_F_GSO_GRE_CSUM_BIT] =	 "tx-gre-csum-segmentation",
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	[NETIF_F_GSO_IPIP_BIT] =	 "tx-ipip-segmentation",
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	[NETIF_F_GSO_SIT_BIT] =		 "tx-sit-segmentation",
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	[NETIF_F_GSO_UDP_TUNNEL_BIT] =	 "tx-udp_tnl-segmentation",
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	[NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
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	[NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
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	[NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
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	[NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
	[NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
	[NETIF_F_RXHASH_BIT] =           "rx-hashing",
	[NETIF_F_RXCSUM_BIT] =           "rx-checksum",
	[NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
	[NETIF_F_LOOPBACK_BIT] =         "loopback",
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	[NETIF_F_RXFCS_BIT] =            "rx-fcs",
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	[NETIF_F_RXALL_BIT] =            "rx-all",
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	[NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
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	[NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
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	[NETIF_F_HW_TC_BIT] =		 "hw-tc-offload",
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};

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static const char
rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
	[ETH_RSS_HASH_TOP_BIT] =	"toeplitz",
	[ETH_RSS_HASH_XOR_BIT] =	"xor",
};

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static const char
tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
	[ETHTOOL_ID_UNSPEC]     = "Unspec",
	[ETHTOOL_RX_COPYBREAK]	= "rx-copybreak",
	[ETHTOOL_TX_COPYBREAK]	= "tx-copybreak",
};

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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 phy_get_sset_count(struct phy_device *phydev)
{
	int ret;

	if (phydev->drv->get_sset_count &&
	    phydev->drv->get_strings &&
	    phydev->drv->get_stats) {
		mutex_lock(&phydev->lock);
		ret = phydev->drv->get_sset_count(phydev);
		mutex_unlock(&phydev->lock);

		return ret;
	}

	return -EOPNOTSUPP;
}

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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_STATS) {
		if (dev->phydev)
			return phy_get_sset_count(dev->phydev);
		else
			return -EOPNOTSUPP;
	}

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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_STATS) {
		struct phy_device *phydev = dev->phydev;

		if (phydev) {
			mutex_lock(&phydev->lock);
			phydev->drv->get_strings(phydev, data);
			mutex_unlock(&phydev->lock);
		} else {
			return;
		}
	} 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_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:
		return NETIF_F_SG;
	case ETHTOOL_GTSO:
	case ETHTOOL_STSO:
		return NETIF_F_ALL_TSO;
	case ETHTOOL_GUFO:
	case ETHTOOL_SUFO:
		return NETIF_F_UFO;
	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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static void convert_legacy_u32_to_link_mode(unsigned long *dst, u32 legacy_u32)
{
	bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
	dst[0] = legacy_u32;
}

/* return false if src had higher bits set. lower bits always updated. */
static bool convert_link_mode_to_legacy_u32(u32 *legacy_u32,
					    const unsigned long *src)
{
	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;
}

/* return false if legacy contained non-0 deprecated fields
 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
 */
static bool
convert_legacy_settings_to_link_ksettings(
	struct ethtool_link_ksettings *link_ksettings,
	const struct ethtool_cmd *legacy_settings)
{
	bool retval = true;

	memset(link_ksettings, 0, sizeof(*link_ksettings));

	/* This is used to tell users that driver is still using these
	 * deprecated legacy fields, and they should not use
	 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
	 */
	if (legacy_settings->transceiver ||
	    legacy_settings->maxtxpkt ||
	    legacy_settings->maxrxpkt)
		retval = false;

	convert_legacy_u32_to_link_mode(
		link_ksettings->link_modes.supported,
		legacy_settings->supported);
	convert_legacy_u32_to_link_mode(
		link_ksettings->link_modes.advertising,
		legacy_settings->advertising);
	convert_legacy_u32_to_link_mode(
		link_ksettings->link_modes.lp_advertising,
		legacy_settings->lp_advertising);
	link_ksettings->base.speed
		= ethtool_cmd_speed(legacy_settings);
	link_ksettings->base.duplex
		= legacy_settings->duplex;
	link_ksettings->base.port
		= legacy_settings->port;
	link_ksettings->base.phy_address
		= legacy_settings->phy_address;
	link_ksettings->base.autoneg
		= legacy_settings->autoneg;
	link_ksettings->base.mdio_support
		= legacy_settings->mdio_support;
	link_ksettings->base.eth_tp_mdix
		= legacy_settings->eth_tp_mdix;
	link_ksettings->base.eth_tp_mdix_ctrl
		= legacy_settings->eth_tp_mdix_ctrl;
	return retval;
}

/* 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;
	 */

	retval &= convert_link_mode_to_legacy_u32(
		&legacy_settings->supported,
		link_ksettings->link_modes.supported);
	retval &= convert_link_mode_to_legacy_u32(
		&legacy_settings->advertising,
		link_ksettings->link_modes.advertising);
	retval &= convert_link_mode_to_legacy_u32(
		&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;
	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;
};

/* Internal kernel helper to query a device ethtool_link_settings.
 *
 * Backward compatibility note: for compatibility with legacy drivers
 * that implement only the ethtool_cmd API, this has to work with both
 * drivers implementing get_link_ksettings API and drivers
 * implementing get_settings API. When drivers implement get_settings
 * and report ethtool_cmd deprecated fields
 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
 * because the resulting struct ethtool_link_settings does not report them.
 */
int __ethtool_get_link_ksettings(struct net_device *dev,
				 struct ethtool_link_ksettings *link_ksettings)
{
	int err;
	struct ethtool_cmd cmd;

	ASSERT_RTNL();

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

	/* driver doesn't support %ethtool_link_ksettings API. revert to
	 * legacy %ethtool_cmd API, unless it's not supported either.
	 * TODO: remove when ethtool_ops::get_settings disappears internally
	 */
557 558 559 560 561 562
	if (!dev->ethtool_ops->get_settings)
		return -EOPNOTSUPP;

	memset(&cmd, 0, sizeof(cmd));
	cmd.cmd = ETHTOOL_GSET;
	err = dev->ethtool_ops->get_settings(dev, &cmd);
563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660
	if (err < 0)
		return err;

	/* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
	 */
	convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
	return err;
}
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));
	bitmap_from_u32array(to->link_modes.supported,
			     __ETHTOOL_LINK_MODE_MASK_NBITS,
			     link_usettings.link_modes.supported,
			     __ETHTOOL_LINK_MODE_MASK_NU32);
	bitmap_from_u32array(to->link_modes.advertising,
			     __ETHTOOL_LINK_MODE_MASK_NBITS,
			     link_usettings.link_modes.advertising,
			     __ETHTOOL_LINK_MODE_MASK_NU32);
	bitmap_from_u32array(to->link_modes.lp_advertising,
			     __ETHTOOL_LINK_MODE_MASK_NBITS,
			     link_usettings.link_modes.lp_advertising,
			     __ETHTOOL_LINK_MODE_MASK_NU32);

	return 0;
}

/* 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));
	bitmap_to_u32array(link_usettings.link_modes.supported,
			   __ETHTOOL_LINK_MODE_MASK_NU32,
			   from->link_modes.supported,
			   __ETHTOOL_LINK_MODE_MASK_NBITS);
	bitmap_to_u32array(link_usettings.link_modes.advertising,
			   __ETHTOOL_LINK_MODE_MASK_NU32,
			   from->link_modes.advertising,
			   __ETHTOOL_LINK_MODE_MASK_NBITS);
	bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
			   __ETHTOOL_LINK_MODE_MASK_NU32,
			   from->link_modes.lp_advertising,
			   __ETHTOOL_LINK_MODE_MASK_NBITS);

	if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
		return -EFAULT;

	return 0;
}

/* Query device for its ethtool_link_settings.
 *
 * Backward compatibility note: this function must fail when driver
 * does not implement ethtool::get_link_ksettings, even if legacy
 * ethtool_ops::get_settings is implemented. This tells new versions
 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
 * this driver, so that they can correctly access the ethtool_cmd
 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 * implements ethtool_ops::get_settings anymore.
 */
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));
661
		link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
		/* 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);
}

/* Update device ethtool_link_settings.
 *
 * Backward compatibility note: this function must fail when driver
 * does not implement ethtool::set_link_ksettings, even if legacy
 * ethtool_ops::set_settings is implemented. This tells new versions
 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
 * this driver, so that they can correctly update the ethtool_cmd
 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 * implements ethtool_ops::get_settings anymore.
 */
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;

	return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
}

static void
warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
{
	char name[sizeof(current->comm)];

	pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
		     get_task_comm(name, current), details);
}

/* Query device for its ethtool_cmd settings.
 *
 * Backward compatibility note: for compatibility with legacy ethtool,
 * this has to work with both drivers implementing get_link_ksettings
 * API and drivers implementing get_settings API. When drivers
 * implement get_link_ksettings and report 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).
 */
759 760 761 762
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_cmd cmd;

763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
	ASSERT_RTNL();

	if (dev->ethtool_ops->get_link_ksettings) {
		/* First, use link_ksettings API if it is supported */
		int err;
		struct ethtool_link_ksettings link_ksettings;

		memset(&link_ksettings, 0, sizeof(link_ksettings));
		err = dev->ethtool_ops->get_link_ksettings(dev,
							   &link_ksettings);
		if (err < 0)
			return err;
		if (!convert_link_ksettings_to_legacy_settings(&cmd,
							       &link_ksettings))
			warn_incomplete_ethtool_legacy_settings_conversion(
				"link modes are only partially reported");

		/* send a sensible cmd tag back to user */
		cmd.cmd = ETHTOOL_GSET;
	} else {
		/* driver doesn't support %ethtool_link_ksettings
		 * API. revert to legacy %ethtool_cmd API, unless it's
		 * not supported either.
		 */
787 788 789 790 791 792 793 794
		int err;

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

		memset(&cmd, 0, sizeof(cmd));
		cmd.cmd = ETHTOOL_GSET;
		err = dev->ethtool_ops->get_settings(dev, &cmd);
795 796 797
		if (err < 0)
			return err;
	}
L
Linus Torvalds 已提交
798 799 800

	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
		return -EFAULT;
801

L
Linus Torvalds 已提交
802 803 804
	return 0;
}

805 806 807 808 809 810 811 812 813 814
/* Update device link settings with given ethtool_cmd.
 *
 * Backward compatibility note: for compatibility with legacy ethtool,
 * this has to work with both drivers implementing set_link_ksettings
 * API and drivers implementing set_settings API. When drivers
 * implement set_link_ksettings and 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.
 */
L
Linus Torvalds 已提交
815 816 817 818
static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_cmd cmd;

819
	ASSERT_RTNL();
L
Linus Torvalds 已提交
820 821 822 823

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

824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847
	/* first, try new %ethtool_link_ksettings API. */
	if (dev->ethtool_ops->set_link_ksettings) {
		struct ethtool_link_ksettings link_ksettings;

		if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
							       &cmd))
			return -EINVAL;

		link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
		link_ksettings.base.link_mode_masks_nwords
			= __ETHTOOL_LINK_MODE_MASK_NU32;
		return dev->ethtool_ops->set_link_ksettings(dev,
							    &link_ksettings);
	}

	/* legacy %ethtool_cmd API */

	/* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
	 * disappears internally
	 */

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

L
Linus Torvalds 已提交
848 849 850
	return dev->ethtool_ops->set_settings(dev, &cmd);
}

851 852
static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
						  void __user *useraddr)
L
Linus Torvalds 已提交
853 854
{
	struct ethtool_drvinfo info;
855
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
856 857 858

	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GDRVINFO;
859
	if (ops->get_drvinfo) {
860 861 862 863 864 865 866 867 868
		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
869

870 871
	/*
	 * this method of obtaining string set info is deprecated;
872
	 * Use ETHTOOL_GSSET_INFO instead.
873
	 */
874
	if (ops->get_sset_count) {
875 876 877 878 879 880 881 882
		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;
883 884 885
		rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
		if (rc >= 0)
			info.n_priv_flags = rc;
886
	}
887
	if (ops->get_regs_len)
L
Linus Torvalds 已提交
888
		info.regdump_len = ops->get_regs_len(dev);
889
	if (ops->get_eeprom_len)
L
Linus Torvalds 已提交
890 891 892 893 894 895 896
		info.eedump_len = ops->get_eeprom_len(dev);

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

E
Eric Dumazet 已提交
897
static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
898
						    void __user *useraddr)
899 900 901 902 903 904 905 906 907 908 909 910 911 912 913
{
	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 */
914
	n_bits = hweight64(sset_mask);
915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930

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

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

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

931
		rc = __ethtool_get_sset_count(dev, i);
932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
		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;
}

953
static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
954
						u32 cmd, void __user *useraddr)
955
{
956 957
	struct ethtool_rxnfc info;
	size_t info_size = sizeof(info);
958
	int rc;
959

960
	if (!dev->ethtool_ops->set_rxnfc)
961 962
		return -EOPNOTSUPP;

963 964 965 966 967 968 969 970 971
	/* 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))
972 973
		return -EFAULT;

974 975 976 977 978 979 980 981 982
	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;
983 984
}

985
static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
986
						u32 cmd, void __user *useraddr)
987 988
{
	struct ethtool_rxnfc info;
989
	size_t info_size = sizeof(info);
990 991 992
	const struct ethtool_ops *ops = dev->ethtool_ops;
	int ret;
	void *rule_buf = NULL;
993

994
	if (!ops->get_rxnfc)
995 996
		return -EOPNOTSUPP;

997 998 999 1000 1001 1002 1003 1004 1005
	/* 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))
1006 1007
		return -EFAULT;

1008 1009
	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
		if (info.rule_cnt > 0) {
1010
			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1011
				rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1012
						   GFP_USER);
1013 1014 1015 1016
			if (!rule_buf)
				return -ENOMEM;
		}
	}
1017

1018 1019 1020 1021 1022
	ret = ops->get_rxnfc(dev, &info, rule_buf);
	if (ret < 0)
		goto err_out;

	ret = -EFAULT;
1023
	if (copy_to_user(useraddr, &info, info_size))
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
		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:
1035
	kfree(rule_buf);
1036 1037

	return ret;
1038 1039
}

1040 1041 1042 1043
static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
					struct ethtool_rxnfc *rx_rings,
					u32 size)
{
1044
	int i;
1045 1046

	if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1047
		return -EFAULT;
1048 1049

	/* Validate ring indices */
1050 1051 1052 1053 1054
	for (i = 0; i < size; i++)
		if (indir[i] >= rx_rings->data)
			return -EINVAL;

	return 0;
1055 1056
}

1057
u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1058 1059 1060 1061 1062 1063 1064 1065 1066

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);

1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
{
	u32 dev_size, current_max = 0;
	u32 *indir;
	int ret;

	if (!dev->ethtool_ops->get_rxfh_indir_size ||
	    !dev->ethtool_ops->get_rxfh)
		return -EOPNOTSUPP;
	dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
	if (dev_size == 0)
		return -EOPNOTSUPP;

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

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

	while (dev_size--)
		current_max = max(current_max, indir[dev_size]);

	*max = current_max;

out:
	kfree(indir);
	return ret;
}

1098 1099 1100
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
1101 1102
	u32 user_size, dev_size;
	u32 *indir;
1103 1104
	int ret;

1105
	if (!dev->ethtool_ops->get_rxfh_indir_size ||
1106
	    !dev->ethtool_ops->get_rxfh)
1107 1108 1109
		return -EOPNOTSUPP;
	dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
	if (dev_size == 0)
1110 1111
		return -EOPNOTSUPP;

1112
	if (copy_from_user(&user_size,
1113
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1114
			   sizeof(user_size)))
1115 1116
		return -EFAULT;

1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
	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);
1129 1130 1131
	if (!indir)
		return -ENOMEM;

1132
	ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1133 1134 1135
	if (ret)
		goto out;

1136 1137 1138
	if (copy_to_user(useraddr +
			 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
			 indir, dev_size * sizeof(indir[0])))
1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
		ret = -EFAULT;

out:
	kfree(indir);
	return ret;
}

static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
1149 1150 1151
	struct ethtool_rxnfc rx_rings;
	u32 user_size, dev_size, i;
	u32 *indir;
1152
	const struct ethtool_ops *ops = dev->ethtool_ops;
1153
	int ret;
1154
	u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1155

1156
	if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1157
	    !ops->get_rxnfc)
1158
		return -EOPNOTSUPP;
1159 1160

	dev_size = ops->get_rxfh_indir_size(dev);
1161
	if (dev_size == 0)
1162 1163
		return -EOPNOTSUPP;

1164
	if (copy_from_user(&user_size,
1165
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1166
			   sizeof(user_size)))
1167 1168
		return -EFAULT;

1169
	if (user_size != 0 && user_size != dev_size)
1170 1171 1172
		return -EINVAL;

	indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1173 1174 1175
	if (!indir)
		return -ENOMEM;

1176
	rx_rings.cmd = ETHTOOL_GRXRINGS;
1177
	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1178 1179
	if (ret)
		goto out;
1180 1181 1182 1183 1184

	if (user_size == 0) {
		for (i = 0; i < dev_size; i++)
			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
	} else {
1185 1186 1187 1188 1189 1190 1191 1192
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + ringidx_offset,
						  &rx_rings,
						  dev_size);
		if (ret)
			goto out;
	}

1193
	ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1194 1195 1196 1197 1198 1199 1200 1201
	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;
1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212

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;
1213
	u32 user_indir_size, user_key_size;
1214
	u32 dev_indir_size = 0, dev_key_size = 0;
1215
	struct ethtool_rxfh rxfh;
1216
	u32 total_size;
1217
	u32 indir_bytes;
1218
	u32 *indir = NULL;
1219
	u8 dev_hfunc = 0;
1220 1221 1222
	u8 *hkey = NULL;
	u8 *rss_config;

1223
	if (!ops->get_rxfh)
1224 1225 1226 1227 1228 1229 1230
		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);

1231
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1232
		return -EFAULT;
1233 1234
	user_indir_size = rxfh.indir_size;
	user_key_size = rxfh.key_size;
1235

1236
	/* Check that reserved fields are 0 for now */
1237 1238
	if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
	    rxfh.rsvd8[2] || rxfh.rsvd32)
1239 1240 1241 1242 1243
		return -EINVAL;

	rxfh.indir_size = dev_indir_size;
	rxfh.key_size = dev_key_size;
	if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
		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;

1262 1263 1264
	ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
	if (ret)
		goto out;
1265

1266 1267 1268 1269 1270 1271 1272 1273 1274
	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:
1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285
	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;
1286 1287
	struct ethtool_rxfh rxfh;
	u32 dev_indir_size = 0, dev_key_size = 0, i;
1288 1289 1290 1291 1292
	u32 *indir = NULL, indir_bytes = 0;
	u8 *hkey = NULL;
	u8 *rss_config;
	u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);

1293
	if (!ops->get_rxnfc || !ops->set_rxfh)
1294 1295 1296 1297 1298
		return -EOPNOTSUPP;

	if (ops->get_rxfh_indir_size)
		dev_indir_size = ops->get_rxfh_indir_size(dev);
	if (ops->get_rxfh_key_size)
1299
		dev_key_size = ops->get_rxfh_key_size(dev);
1300

1301
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1302 1303
		return -EFAULT;

1304
	/* Check that reserved fields are 0 for now */
1305 1306
	if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
	    rxfh.rsvd8[2] || rxfh.rsvd32)
1307 1308
		return -EINVAL;

1309 1310
	/* If either indir, hash key or function is valid, proceed further.
	 * Must request at least one change: indir size, hash key or function.
1311
	 */
1312 1313 1314 1315 1316
	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 &&
1317
	     rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1318 1319
		return -EINVAL;

1320
	if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1321 1322
		indir_bytes = dev_indir_size * sizeof(indir[0]);

1323
	rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1324 1325 1326 1327 1328 1329 1330 1331
	if (!rss_config)
		return -ENOMEM;

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

1332 1333
	/* rxfh.indir_size == 0 means reset the indir table to default.
	 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1334
	 */
1335 1336
	if (rxfh.indir_size &&
	    rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1337 1338 1339 1340
		indir = (u32 *)rss_config;
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + rss_cfg_offset,
						  &rx_rings,
1341
						  rxfh.indir_size);
1342
		if (ret)
1343
			goto out;
1344
	} else if (rxfh.indir_size == 0) {
1345 1346 1347 1348
		indir = (u32 *)rss_config;
		for (i = 0; i < dev_indir_size; i++)
			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
	}
1349

1350
	if (rxfh.key_size) {
1351 1352 1353
		hkey = rss_config + indir_bytes;
		if (copy_from_user(hkey,
				   useraddr + rss_cfg_offset + indir_bytes,
1354
				   rxfh.key_size)) {
1355 1356
			ret = -EFAULT;
			goto out;
1357
		}
1358 1359
	}

1360
	ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1361 1362 1363 1364 1365 1366 1367 1368
	if (ret)
		goto out;

	/* 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;
1369 1370

out:
1371
	kfree(rss_config);
1372 1373 1374
	return ret;
}

L
Linus Torvalds 已提交
1375 1376 1377
static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_regs regs;
1378
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391
	void *regbuf;
	int reglen, ret;

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

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

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

1392
	regbuf = vzalloc(reglen);
1393
	if (reglen && !regbuf)
L
Linus Torvalds 已提交
1394 1395 1396 1397 1398 1399 1400 1401
		return -ENOMEM;

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

	ret = -EFAULT;
	if (copy_to_user(useraddr, &regs, sizeof(regs)))
		goto out;
	useraddr += offsetof(struct ethtool_regs, data);
1402
	if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
L
Linus Torvalds 已提交
1403 1404 1405 1406
		goto out;
	ret = 0;

 out:
1407
	vfree(regbuf);
L
Linus Torvalds 已提交
1408 1409 1410
	return ret;
}

B
Ben Hutchings 已提交
1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
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
1431 1432
static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
1433
	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
L
Linus Torvalds 已提交
1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457

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

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

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

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

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

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

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

1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491
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
1492 1493 1494 1495 1496 1497 1498 1499
static int ethtool_nway_reset(struct net_device *dev)
{
	if (!dev->ethtool_ops->nway_reset)
		return -EOPNOTSUPP;

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

1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513
static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };

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

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

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

1514 1515 1516 1517
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
1518 1519
{
	struct ethtool_eeprom eeprom;
1520 1521
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
1522
	u8 *data;
1523
	int ret = 0;
L
Linus Torvalds 已提交
1524 1525 1526 1527 1528 1529 1530 1531 1532

	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 */
1533
	if (eeprom.offset + eeprom.len > total_len)
L
Linus Torvalds 已提交
1534 1535
		return -EINVAL;

1536
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
1537 1538 1539
	if (!data)
		return -ENOMEM;

1540 1541 1542 1543
	bytes_remaining = eeprom.len;
	while (bytes_remaining > 0) {
		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

1544
		ret = getter(dev, &eeprom, data);
1545 1546 1547 1548 1549 1550 1551 1552 1553 1554
		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
1555

1556 1557 1558 1559 1560
	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
1561 1562 1563 1564
	kfree(data);
	return ret;
}

1565 1566 1567 1568
static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

1569 1570
	if (!ops->get_eeprom || !ops->get_eeprom_len ||
	    !ops->get_eeprom_len(dev))
1571 1572 1573 1574 1575 1576
		return -EOPNOTSUPP;

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

L
Linus Torvalds 已提交
1577 1578 1579
static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
1580
	const struct ethtool_ops *ops = dev->ethtool_ops;
1581 1582
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
1583
	u8 *data;
1584
	int ret = 0;
L
Linus Torvalds 已提交
1585

1586 1587
	if (!ops->set_eeprom || !ops->get_eeprom_len ||
	    !ops->get_eeprom_len(dev))
L
Linus Torvalds 已提交
1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600
		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;

1601
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
1602 1603 1604
	if (!data)
		return -ENOMEM;

1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619
	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
1620 1621 1622 1623 1624

	kfree(data);
	return ret;
}

1625 1626
static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1627
{
1628
	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
L
Linus Torvalds 已提交
1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639

	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;
}

1640 1641
static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1642 1643 1644
{
	struct ethtool_coalesce coalesce;

1645
	if (!dev->ethtool_ops->set_coalesce)
L
Linus Torvalds 已提交
1646 1647 1648 1649 1650 1651 1652 1653 1654 1655
		return -EOPNOTSUPP;

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

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

static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
{
1656
	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
L
Linus Torvalds 已提交
1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680

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

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

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

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

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

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

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

1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698
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)
{
1699
	struct ethtool_channels channels, max;
1700
	u32 max_rx_in_use = 0;
1701

1702
	if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1703 1704 1705 1706 1707
		return -EOPNOTSUPP;

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

1708 1709 1710 1711 1712 1713 1714 1715 1716
	dev->ethtool_ops->get_channels(dev, &max);

	/* ensure new counts are within the maximums */
	if ((channels.rx_count > max.max_rx) ||
	    (channels.tx_count > max.max_tx) ||
	    (channels.combined_count > max.max_combined) ||
	    (channels.other_count > max.max_other))
		return -EINVAL;

1717 1718 1719 1720 1721 1722 1723
	/* 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;

1724 1725 1726
	return dev->ethtool_ops->set_channels(dev, &channels);
}

L
Linus Torvalds 已提交
1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };

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

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

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

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

1745
	if (!dev->ethtool_ops->set_pauseparam)
L
Linus Torvalds 已提交
1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756
		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;
1757
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1758
	u64 *data;
1759
	int ret, test_len;
L
Linus Torvalds 已提交
1760

1761
	if (!ops->self_test || !ops->get_sset_count)
L
Linus Torvalds 已提交
1762 1763
		return -EOPNOTSUPP;

1764
	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1765 1766 1767 1768
	if (test_len < 0)
		return test_len;
	WARN_ON(test_len == 0);

L
Linus Torvalds 已提交
1769 1770 1771
	if (copy_from_user(&test, useraddr, sizeof(test)))
		return -EFAULT;

1772 1773
	test.len = test_len;
	data = kmalloc(test_len * sizeof(u64), GFP_USER);
L
Linus Torvalds 已提交
1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800
	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;

1801
	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1802 1803 1804 1805
	if (ret < 0)
		return ret;

	gstrings.len = ret;
L
Linus Torvalds 已提交
1806

1807
	data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
L
Linus Torvalds 已提交
1808 1809 1810
	if (!data)
		return -ENOMEM;

1811
	__ethtool_get_strings(dev, gstrings.string_set, data);
L
Linus Torvalds 已提交
1812 1813 1814 1815 1816 1817 1818 1819 1820

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

1821
out:
L
Linus Torvalds 已提交
1822 1823 1824 1825 1826 1827 1828
	kfree(data);
	return ret;
}

static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_value id;
1829
	static bool busy;
1830
	const struct ethtool_ops *ops = dev->ethtool_ops;
1831
	int rc;
L
Linus Torvalds 已提交
1832

1833
	if (!ops->set_phys_id)
L
Linus Torvalds 已提交
1834 1835
		return -EOPNOTSUPP;

1836 1837 1838
	if (busy)
		return -EBUSY;

L
Linus Torvalds 已提交
1839 1840 1841
	if (copy_from_user(&id, useraddr, sizeof(id)))
		return -EFAULT;

1842
	rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1843
	if (rc < 0)
1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855
		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(
1856
			id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1857
	} else {
1858 1859 1860 1861
		/* Driver expects to be called at twice the frequency in rc */
		int n = rc * 2, i, interval = HZ / n;

		/* Count down seconds */
1862
		do {
1863 1864 1865 1866
			/* Count down iterations per second */
			i = n;
			do {
				rtnl_lock();
1867
				rc = ops->set_phys_id(dev,
1868 1869 1870 1871 1872 1873
				    (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
				rtnl_unlock();
				if (rc)
					break;
				schedule_timeout_interruptible(interval);
			} while (!signal_pending(current) && --i != 0);
1874 1875 1876 1877 1878 1879 1880 1881
		} while (!signal_pending(current) &&
			 (id.data == 0 || --id.data != 0));
	}

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

1882
	(void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1883
	return rc;
L
Linus Torvalds 已提交
1884 1885 1886 1887 1888
}

static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_stats stats;
1889
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1890
	u64 *data;
1891
	int ret, n_stats;
L
Linus Torvalds 已提交
1892

1893
	if (!ops->get_ethtool_stats || !ops->get_sset_count)
L
Linus Torvalds 已提交
1894 1895
		return -EOPNOTSUPP;

1896
	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1897 1898 1899 1900
	if (n_stats < 0)
		return n_stats;
	WARN_ON(n_stats == 0);

L
Linus Torvalds 已提交
1901 1902 1903
	if (copy_from_user(&stats, useraddr, sizeof(stats)))
		return -EFAULT;

1904 1905
	stats.n_stats = n_stats;
	data = kmalloc(n_stats * sizeof(u64), GFP_USER);
L
Linus Torvalds 已提交
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923
	if (!data)
		return -ENOMEM;

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

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

 out:
	kfree(data);
	return ret;
}

A
Andrew Lunn 已提交
1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_stats stats;
	struct phy_device *phydev = dev->phydev;
	u64 *data;
	int ret, n_stats;

	if (!phydev)
		return -EOPNOTSUPP;

	n_stats = phy_get_sset_count(phydev);

	if (n_stats < 0)
		return n_stats;
	WARN_ON(n_stats == 0);

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

	stats.n_stats = n_stats;
	data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
	if (!data)
		return -ENOMEM;

	mutex_lock(&phydev->lock);
	phydev->drv->get_stats(phydev, &stats, data);
	mutex_unlock(&phydev->lock);

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

 out:
	kfree(data);
	return ret;
}

1965
static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1966 1967 1968
{
	struct ethtool_perm_addr epaddr;

1969
	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1970 1971
		return -EFAULT;

1972 1973 1974
	if (epaddr.size < dev->addr_len)
		return -ETOOSMALL;
	epaddr.size = dev->addr_len;
1975 1976

	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1977
		return -EFAULT;
1978
	useraddr += sizeof(epaddr);
1979 1980 1981
	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
		return -EFAULT;
	return 0;
1982 1983
}

1984 1985
static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
			     u32 cmd, u32 (*actor)(struct net_device *))
1986
{
1987
	struct ethtool_value edata = { .cmd = cmd };
1988

1989
	if (!actor)
1990 1991
		return -EOPNOTSUPP;

1992
	edata.data = actor(dev);
1993 1994 1995 1996 1997 1998

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

1999 2000
static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
			     void (*actor)(struct net_device *, u32))
2001 2002 2003
{
	struct ethtool_value edata;

2004
	if (!actor)
2005 2006 2007 2008 2009
		return -EOPNOTSUPP;

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

2010
	actor(dev, edata.data);
2011 2012 2013
	return 0;
}

2014 2015
static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
			     int (*actor)(struct net_device *, u32))
2016 2017 2018
{
	struct ethtool_value edata;

2019
	if (!actor)
2020 2021 2022 2023 2024
		return -EOPNOTSUPP;

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

2025
	return actor(dev, edata.data);
2026 2027
}

2028 2029
static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
						   char __user *useraddr)
2030 2031 2032 2033 2034 2035 2036 2037 2038
{
	struct ethtool_flash efl;

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

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

2039 2040
	efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;

2041 2042 2043
	return dev->ethtool_ops->flash_device(dev, &efl);
}

2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064
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;

2065
	if (!ops->get_dump_flag)
2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088
		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;

2089
	if (!ops->get_dump_data || !ops->get_dump_flag)
2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100
		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;

2101
	len = min(tmp.len, dump.len);
2102 2103 2104
	if (!len)
		return -EFAULT;

2105 2106 2107 2108 2109 2110 2111 2112 2113
	/* 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.
	 */
2114 2115 2116 2117 2118 2119 2120
	data = vzalloc(tmp.len);
	if (!data)
		return -ENOMEM;
	ret = ops->get_dump_data(dev, &dump, data);
	if (ret)
		goto out;

2121 2122 2123 2124 2125 2126 2127 2128 2129 2130
	/* 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;

2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142
	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;
}

2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154
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;

	if (phydev && phydev->drv && phydev->drv->ts_info) {
		err = phydev->drv->ts_info(phydev, &info);
2155
	} else if (ops->get_ts_info) {
2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172
		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;
}

2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187
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;

	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;
}

2188 2189 2190 2191 2192 2193 2194 2195 2196
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;

2197
	ret = __ethtool_get_module_info(dev, &modinfo);
2198 2199 2200 2201 2202 2203 2204 2205 2206
	if (ret)
		return ret;

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

	return 0;
}

2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221
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;

	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;
}

2222 2223 2224 2225 2226 2227
static int ethtool_get_module_eeprom(struct net_device *dev,
				     void __user *useraddr)
{
	int ret;
	struct ethtool_modinfo modinfo;

2228
	ret = __ethtool_get_module_info(dev, &modinfo);
2229 2230 2231
	if (ret)
		return ret;

2232 2233
	return ethtool_get_any_eeprom(dev, useraddr,
				      __ethtool_get_module_eeprom,
2234 2235 2236
				      modinfo.eeprom_len);
}

2237 2238 2239 2240
static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
{
	switch (tuna->id) {
	case ETHTOOL_RX_COPYBREAK:
2241
	case ETHTOOL_TX_COPYBREAK:
2242 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 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311
		if (tuna->len != sizeof(u32) ||
		    tuna->type_id != ETHTOOL_TUNABLE_U32)
			return -EINVAL;
		break;
	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;
	data = kmalloc(tuna.len, GFP_USER);
	if (!data)
		return -ENOMEM;
	useraddr += sizeof(tuna);
	ret = -EFAULT;
	if (copy_from_user(data, useraddr, tuna.len))
		goto out;
	ret = ops->set_tunable(dev, &tuna, data);

out:
	kfree(data);
	return ret;
}

2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343
static int ethtool_get_per_queue_coalesce(struct net_device *dev,
					  void __user *useraddr,
					  struct ethtool_per_queue_op *per_queue_opt)
{
	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);

	bitmap_from_u32array(queue_mask,
			     MAX_NUM_QUEUE,
			     per_queue_opt->queue_mask,
			     DIV_ROUND_UP(MAX_NUM_QUEUE, 32));

	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;
}

2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402
static int ethtool_set_per_queue_coalesce(struct net_device *dev,
					  void __user *useraddr,
					  struct ethtool_per_queue_op *per_queue_opt)
{
	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);

	bitmap_from_u32array(queue_mask,
			     MAX_NUM_QUEUE,
			     per_queue_opt->queue_mask,
			     DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
	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;
		}

		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;
}

2403 2404 2405 2406 2407 2408 2409 2410
static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_per_queue_op per_queue_opt;

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

	switch (per_queue_opt.sub_command) {
2411 2412
	case ETHTOOL_GCOALESCE:
		return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2413 2414
	case ETHTOOL_SCOALESCE:
		return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2415 2416 2417 2418 2419
	default:
		return -EOPNOTSUPP;
	};
}

2420
/* The main entry point in this file.  Called from net/core/dev_ioctl.c */
L
Linus Torvalds 已提交
2421

2422
int dev_ethtool(struct net *net, struct ifreq *ifr)
L
Linus Torvalds 已提交
2423
{
2424
	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
L
Linus Torvalds 已提交
2425
	void __user *useraddr = ifr->ifr_data;
2426
	u32 ethcmd, sub_cmd;
L
Linus Torvalds 已提交
2427
	int rc;
2428
	netdev_features_t old_features;
L
Linus Torvalds 已提交
2429 2430 2431 2432

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

2433
	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
L
Linus Torvalds 已提交
2434 2435
		return -EFAULT;

2436 2437 2438 2439 2440 2441
	if (ethcmd == ETHTOOL_PERQUEUE) {
		if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
			return -EFAULT;
	} else {
		sub_cmd = ethcmd;
	}
2442
	/* Allow some commands to be done by anyone */
2443
	switch (sub_cmd) {
2444
	case ETHTOOL_GSET:
2445 2446
	case ETHTOOL_GDRVINFO:
	case ETHTOOL_GMSGLVL:
2447
	case ETHTOOL_GLINK:
2448 2449 2450 2451 2452 2453
	case ETHTOOL_GCOALESCE:
	case ETHTOOL_GRINGPARAM:
	case ETHTOOL_GPAUSEPARAM:
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
	case ETHTOOL_GSG:
2454
	case ETHTOOL_GSSET_INFO:
2455
	case ETHTOOL_GSTRINGS:
2456
	case ETHTOOL_GSTATS:
A
Andrew Lunn 已提交
2457
	case ETHTOOL_GPHYSTATS:
2458 2459 2460 2461
	case ETHTOOL_GTSO:
	case ETHTOOL_GPERMADDR:
	case ETHTOOL_GUFO:
	case ETHTOOL_GGSO:
2462
	case ETHTOOL_GGRO:
2463 2464
	case ETHTOOL_GFLAGS:
	case ETHTOOL_GPFLAGS:
2465
	case ETHTOOL_GRXFH:
2466 2467 2468 2469
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
2470
	case ETHTOOL_GRXFHINDIR:
2471
	case ETHTOOL_GRSSH:
2472
	case ETHTOOL_GFEATURES:
2473
	case ETHTOOL_GCHANNELS:
2474
	case ETHTOOL_GET_TS_INFO:
2475
	case ETHTOOL_GEEE:
2476
	case ETHTOOL_GTUNABLE:
2477 2478
		break;
	default:
2479
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2480 2481 2482
			return -EPERM;
	}

2483 2484 2485
	if (dev->ethtool_ops->begin) {
		rc = dev->ethtool_ops->begin(dev);
		if (rc  < 0)
L
Linus Torvalds 已提交
2486
			return rc;
2487
	}
2488 2489
	old_features = dev->features;

L
Linus Torvalds 已提交
2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509
	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:
2510 2511
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_msglevel);
L
Linus Torvalds 已提交
2512 2513
		break;
	case ETHTOOL_SMSGLVL:
2514 2515
		rc = ethtool_set_value_void(dev, useraddr,
				       dev->ethtool_ops->set_msglevel);
L
Linus Torvalds 已提交
2516
		break;
2517 2518 2519 2520 2521 2522
	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
2523 2524 2525 2526
	case ETHTOOL_NWAY_RST:
		rc = ethtool_nway_reset(dev);
		break;
	case ETHTOOL_GLINK:
2527
		rc = ethtool_get_link(dev, useraddr);
L
Linus Torvalds 已提交
2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564
		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;
2565 2566 2567
	case ETHTOOL_GPERMADDR:
		rc = ethtool_get_perm_addr(dev, useraddr);
		break;
2568
	case ETHTOOL_GFLAGS:
2569
		rc = ethtool_get_value(dev, useraddr, ethcmd,
M
Michał Mirosław 已提交
2570
					__ethtool_get_flags);
2571 2572
		break;
	case ETHTOOL_SFLAGS:
2573
		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2574
		break;
2575
	case ETHTOOL_GPFLAGS:
2576 2577
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_priv_flags);
2578 2579
		break;
	case ETHTOOL_SPFLAGS:
2580 2581
		rc = ethtool_set_value(dev, useraddr,
				       dev->ethtool_ops->set_priv_flags);
2582
		break;
2583
	case ETHTOOL_GRXFH:
2584 2585 2586 2587
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
2588
		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2589 2590
		break;
	case ETHTOOL_SRXFH:
2591 2592
	case ETHTOOL_SRXCLSRLDEL:
	case ETHTOOL_SRXCLSRLINS:
2593
		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2594
		break;
2595 2596 2597
	case ETHTOOL_FLASHDEV:
		rc = ethtool_flash_device(dev, useraddr);
		break;
B
Ben Hutchings 已提交
2598 2599 2600
	case ETHTOOL_RESET:
		rc = ethtool_reset(dev, useraddr);
		break;
2601 2602 2603
	case ETHTOOL_GSSET_INFO:
		rc = ethtool_get_sset_info(dev, useraddr);
		break;
2604 2605 2606 2607 2608 2609
	case ETHTOOL_GRXFHINDIR:
		rc = ethtool_get_rxfh_indir(dev, useraddr);
		break;
	case ETHTOOL_SRXFHINDIR:
		rc = ethtool_set_rxfh_indir(dev, useraddr);
		break;
2610 2611 2612 2613 2614 2615
	case ETHTOOL_GRSSH:
		rc = ethtool_get_rxfh(dev, useraddr);
		break;
	case ETHTOOL_SRSSH:
		rc = ethtool_set_rxfh(dev, useraddr);
		break;
2616 2617 2618 2619 2620 2621
	case ETHTOOL_GFEATURES:
		rc = ethtool_get_features(dev, useraddr);
		break;
	case ETHTOOL_SFEATURES:
		rc = ethtool_set_features(dev, useraddr);
		break;
2622
	case ETHTOOL_GTXCSUM:
2623
	case ETHTOOL_GRXCSUM:
2624 2625 2626 2627 2628 2629 2630 2631
	case ETHTOOL_GSG:
	case ETHTOOL_GTSO:
	case ETHTOOL_GUFO:
	case ETHTOOL_GGSO:
	case ETHTOOL_GGRO:
		rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
		break;
	case ETHTOOL_STXCSUM:
2632
	case ETHTOOL_SRXCSUM:
2633 2634 2635 2636 2637 2638 2639
	case ETHTOOL_SSG:
	case ETHTOOL_STSO:
	case ETHTOOL_SUFO:
	case ETHTOOL_SGSO:
	case ETHTOOL_SGRO:
		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
		break;
2640 2641 2642 2643 2644 2645
	case ETHTOOL_GCHANNELS:
		rc = ethtool_get_channels(dev, useraddr);
		break;
	case ETHTOOL_SCHANNELS:
		rc = ethtool_set_channels(dev, useraddr);
		break;
2646 2647 2648 2649 2650 2651 2652 2653 2654
	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;
2655 2656 2657
	case ETHTOOL_GET_TS_INFO:
		rc = ethtool_get_ts_info(dev, useraddr);
		break;
2658 2659 2660 2661 2662 2663
	case ETHTOOL_GMODULEINFO:
		rc = ethtool_get_module_info(dev, useraddr);
		break;
	case ETHTOOL_GMODULEEEPROM:
		rc = ethtool_get_module_eeprom(dev, useraddr);
		break;
2664 2665 2666 2667 2668 2669
	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
2670 2671 2672
	case ETHTOOL_GPHYSTATS:
		rc = ethtool_get_phy_stats(dev, useraddr);
		break;
2673 2674 2675
	case ETHTOOL_PERQUEUE:
		rc = ethtool_set_per_queue(dev, useraddr);
		break;
2676 2677 2678 2679 2680 2681
	case ETHTOOL_GLINKSETTINGS:
		rc = ethtool_get_link_ksettings(dev, useraddr);
		break;
	case ETHTOOL_SLINKSETTINGS:
		rc = ethtool_set_link_ksettings(dev, useraddr);
		break;
L
Linus Torvalds 已提交
2682
	default:
2683
		rc = -EOPNOTSUPP;
L
Linus Torvalds 已提交
2684
	}
2685

2686
	if (dev->ethtool_ops->complete)
L
Linus Torvalds 已提交
2687
		dev->ethtool_ops->complete(dev);
2688 2689 2690 2691

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

L
Linus Torvalds 已提交
2692 2693
	return rc;
}