ethtool.c 71.6 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>
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#include <linux/sched/signal.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",
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	[NETIF_F_GRO_HW_BIT] =           "rx-gro-hw",
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	[NETIF_F_LRO_BIT] =              "rx-lro",

	[NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
	[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_IPXIP4_BIT] =	 "tx-ipxip4-segmentation",
	[NETIF_F_GSO_IPXIP6_BIT] =	 "tx-ipxip6-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_GSO_PARTIAL_BIT] =	 "tx-gso-partial",
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	[NETIF_F_GSO_SCTP_BIT] =	 "tx-sctp-segmentation",
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	[NETIF_F_GSO_ESP_BIT] =		 "tx-esp-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_HW_TC_BIT] =		 "hw-tc-offload",
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	[NETIF_F_HW_ESP_BIT] =		 "esp-hw-offload",
	[NETIF_F_HW_ESP_TX_CSUM_BIT] =	 "esp-tx-csum-hw-offload",
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	[NETIF_F_RX_UDP_TUNNEL_PORT_BIT] =	 "rx-udp_tunnel-port-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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	[ETH_RSS_HASH_CRC32_BIT] =	"crc32",
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};

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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 const char
phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
	[ETHTOOL_ID_UNSPEC]     = "Unspec",
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	[ETHTOOL_PHY_DOWNSHIFT]	= "phy-downshift",
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};

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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_TUNABLES)
		return ARRAY_SIZE(phy_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_TUNABLES)
		memcpy(data, phy_tunable_strings, sizeof(phy_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_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 legacy contained non-0 deprecated fields
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 * maxtxpkt/maxrxpkt. rest of ksettings always updated
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 */
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
	 */
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	if (legacy_settings->maxtxpkt ||
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	    legacy_settings->maxrxpkt)
		retval = false;

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	ethtool_convert_legacy_u32_to_link_mode(
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		link_ksettings->link_modes.supported,
		legacy_settings->supported);
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	ethtool_convert_legacy_u32_to_link_mode(
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		link_ksettings->link_modes.advertising,
		legacy_settings->advertising);
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	ethtool_convert_legacy_u32_to_link_mode(
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		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;
	 */

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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);
526
	retval &= ethtool_convert_link_mode_to_legacy_u32(
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543
		&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;
544 545
	legacy_settings->transceiver
		= link_ksettings->base.transceiver;
546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590
	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
	 */
591 592 593 594 595 596
	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);
597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618
	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));
619 620 621 622 623 624 625 626 627
	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);
628 629 630 631 632 633 634 635 636 637 638 639 640 641 642

	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));
643 644 645 646 647 648 649 650 651
	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);
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688

	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));
689
		link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777
		/* 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);
}

/* 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).
 */
778 779 780 781
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_cmd cmd;

782 783 784 785 786 787 788 789 790 791 792 793
	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;
794 795
		convert_link_ksettings_to_legacy_settings(&cmd,
							  &link_ksettings);
796 797 798 799 800 801 802 803

		/* 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.
		 */
804 805 806 807 808 809 810 811
		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);
812 813 814
		if (err < 0)
			return err;
	}
L
Linus Torvalds 已提交
815 816 817

	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
		return -EFAULT;
818

L
Linus Torvalds 已提交
819 820 821
	return 0;
}

822 823 824 825 826 827 828 829 830 831
/* 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
832 833 834 835
static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_cmd cmd;

836
	ASSERT_RTNL();
L
Linus Torvalds 已提交
837 838 839 840

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

841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864
	/* 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
865 866 867
	return dev->ethtool_ops->set_settings(dev, &cmd);
}

868 869
static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
						  void __user *useraddr)
L
Linus Torvalds 已提交
870 871
{
	struct ethtool_drvinfo info;
872
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
873 874 875

	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GDRVINFO;
876
	if (ops->get_drvinfo) {
877 878 879 880 881 882 883 884 885
		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
886

887 888
	/*
	 * this method of obtaining string set info is deprecated;
889
	 * Use ETHTOOL_GSSET_INFO instead.
890
	 */
891
	if (ops->get_sset_count) {
892 893 894 895 896 897 898 899
		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;
900 901 902
		rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
		if (rc >= 0)
			info.n_priv_flags = rc;
903
	}
904
	if (ops->get_regs_len)
L
Linus Torvalds 已提交
905
		info.regdump_len = ops->get_regs_len(dev);
906
	if (ops->get_eeprom_len)
L
Linus Torvalds 已提交
907 908 909 910 911 912 913
		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
914
static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
915
						    void __user *useraddr)
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930
{
	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 */
931
	n_bits = hweight64(sset_mask);
932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947

	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;

948
		rc = __ethtool_get_sset_count(dev, i);
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969
		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;
}

970
static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
971
						u32 cmd, void __user *useraddr)
972
{
973 974
	struct ethtool_rxnfc info;
	size_t info_size = sizeof(info);
975
	int rc;
976

977
	if (!dev->ethtool_ops->set_rxnfc)
978 979
		return -EOPNOTSUPP;

980 981 982 983 984 985 986 987 988
	/* 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))
989 990
		return -EFAULT;

991 992 993 994 995 996 997 998 999
	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;
1000 1001
}

1002
static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1003
						u32 cmd, void __user *useraddr)
1004 1005
{
	struct ethtool_rxnfc info;
1006
	size_t info_size = sizeof(info);
1007 1008 1009
	const struct ethtool_ops *ops = dev->ethtool_ops;
	int ret;
	void *rule_buf = NULL;
1010

1011
	if (!ops->get_rxnfc)
1012 1013
		return -EOPNOTSUPP;

1014 1015 1016 1017 1018 1019 1020 1021 1022
	/* 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))
1023 1024
		return -EFAULT;

1025 1026
	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
		if (info.rule_cnt > 0) {
1027
			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1028
				rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1029
						   GFP_USER);
1030 1031 1032 1033
			if (!rule_buf)
				return -ENOMEM;
		}
	}
1034

1035 1036 1037 1038 1039
	ret = ops->get_rxnfc(dev, &info, rule_buf);
	if (ret < 0)
		goto err_out;

	ret = -EFAULT;
1040
	if (copy_to_user(useraddr, &info, info_size))
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
		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:
1052
	kfree(rule_buf);
1053 1054

	return ret;
1055 1056
}

1057 1058 1059 1060
static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
					struct ethtool_rxnfc *rx_rings,
					u32 size)
{
1061
	int i;
1062 1063

	if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1064
		return -EFAULT;
1065 1066

	/* Validate ring indices */
1067 1068 1069 1070 1071
	for (i = 0; i < size; i++)
		if (indir[i] >= rx_rings->data)
			return -EINVAL;

	return 0;
1072 1073
}

1074
u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1075 1076 1077 1078 1079 1080 1081 1082 1083

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);

1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114
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;
}

1115 1116 1117
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
1118 1119
	u32 user_size, dev_size;
	u32 *indir;
1120 1121
	int ret;

1122
	if (!dev->ethtool_ops->get_rxfh_indir_size ||
1123
	    !dev->ethtool_ops->get_rxfh)
1124 1125 1126
		return -EOPNOTSUPP;
	dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
	if (dev_size == 0)
1127 1128
		return -EOPNOTSUPP;

1129
	if (copy_from_user(&user_size,
1130
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1131
			   sizeof(user_size)))
1132 1133
		return -EFAULT;

1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
	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);
1146 1147 1148
	if (!indir)
		return -ENOMEM;

1149
	ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1150 1151 1152
	if (ret)
		goto out;

1153 1154 1155
	if (copy_to_user(useraddr +
			 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
			 indir, dev_size * sizeof(indir[0])))
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
		ret = -EFAULT;

out:
	kfree(indir);
	return ret;
}

static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
1166 1167 1168
	struct ethtool_rxnfc rx_rings;
	u32 user_size, dev_size, i;
	u32 *indir;
1169
	const struct ethtool_ops *ops = dev->ethtool_ops;
1170
	int ret;
1171
	u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1172

1173
	if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1174
	    !ops->get_rxnfc)
1175
		return -EOPNOTSUPP;
1176 1177

	dev_size = ops->get_rxfh_indir_size(dev);
1178
	if (dev_size == 0)
1179 1180
		return -EOPNOTSUPP;

1181
	if (copy_from_user(&user_size,
1182
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1183
			   sizeof(user_size)))
1184 1185
		return -EFAULT;

1186
	if (user_size != 0 && user_size != dev_size)
1187 1188 1189
		return -EINVAL;

	indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1190 1191 1192
	if (!indir)
		return -ENOMEM;

1193
	rx_rings.cmd = ETHTOOL_GRXRINGS;
1194
	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1195 1196
	if (ret)
		goto out;
1197 1198 1199 1200 1201

	if (user_size == 0) {
		for (i = 0; i < dev_size; i++)
			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
	} else {
1202 1203 1204 1205 1206 1207 1208 1209
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + ringidx_offset,
						  &rx_rings,
						  dev_size);
		if (ret)
			goto out;
	}

1210
	ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1211 1212 1213 1214 1215 1216 1217 1218
	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;
1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229

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;
1230
	u32 user_indir_size, user_key_size;
1231
	u32 dev_indir_size = 0, dev_key_size = 0;
1232
	struct ethtool_rxfh rxfh;
1233
	u32 total_size;
1234
	u32 indir_bytes;
1235
	u32 *indir = NULL;
1236
	u8 dev_hfunc = 0;
1237 1238 1239
	u8 *hkey = NULL;
	u8 *rss_config;

1240
	if (!ops->get_rxfh)
1241 1242 1243 1244 1245 1246 1247
		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);

1248
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1249
		return -EFAULT;
1250 1251
	user_indir_size = rxfh.indir_size;
	user_key_size = rxfh.key_size;
1252

1253
	/* Check that reserved fields are 0 for now */
1254 1255
	if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
	    rxfh.rsvd8[2] || rxfh.rsvd32)
1256 1257 1258 1259 1260
		return -EINVAL;

	rxfh.indir_size = dev_indir_size;
	rxfh.key_size = dev_key_size;
	if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
		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;

1279 1280 1281
	ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
	if (ret)
		goto out;
1282

1283 1284 1285 1286 1287 1288 1289 1290 1291
	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:
1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
	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;
1303 1304
	struct ethtool_rxfh rxfh;
	u32 dev_indir_size = 0, dev_key_size = 0, i;
1305 1306 1307 1308 1309
	u32 *indir = NULL, indir_bytes = 0;
	u8 *hkey = NULL;
	u8 *rss_config;
	u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);

1310
	if (!ops->get_rxnfc || !ops->set_rxfh)
1311 1312 1313 1314 1315
		return -EOPNOTSUPP;

	if (ops->get_rxfh_indir_size)
		dev_indir_size = ops->get_rxfh_indir_size(dev);
	if (ops->get_rxfh_key_size)
1316
		dev_key_size = ops->get_rxfh_key_size(dev);
1317

1318
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1319 1320
		return -EFAULT;

1321
	/* Check that reserved fields are 0 for now */
1322 1323
	if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
	    rxfh.rsvd8[2] || rxfh.rsvd32)
1324 1325
		return -EINVAL;

1326 1327
	/* If either indir, hash key or function is valid, proceed further.
	 * Must request at least one change: indir size, hash key or function.
1328
	 */
1329 1330 1331 1332 1333
	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 &&
1334
	     rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1335 1336
		return -EINVAL;

1337
	if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1338 1339
		indir_bytes = dev_indir_size * sizeof(indir[0]);

1340
	rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1341 1342 1343 1344 1345 1346 1347 1348
	if (!rss_config)
		return -ENOMEM;

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

1349 1350
	/* rxfh.indir_size == 0 means reset the indir table to default.
	 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1351
	 */
1352 1353
	if (rxfh.indir_size &&
	    rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1354 1355 1356 1357
		indir = (u32 *)rss_config;
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + rss_cfg_offset,
						  &rx_rings,
1358
						  rxfh.indir_size);
1359
		if (ret)
1360
			goto out;
1361
	} else if (rxfh.indir_size == 0) {
1362 1363 1364 1365
		indir = (u32 *)rss_config;
		for (i = 0; i < dev_indir_size; i++)
			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
	}
1366

1367
	if (rxfh.key_size) {
1368 1369 1370
		hkey = rss_config + indir_bytes;
		if (copy_from_user(hkey,
				   useraddr + rss_cfg_offset + indir_bytes,
1371
				   rxfh.key_size)) {
1372 1373
			ret = -EFAULT;
			goto out;
1374
		}
1375 1376
	}

1377
	ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1378 1379 1380 1381 1382 1383 1384 1385
	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;
1386 1387

out:
1388
	kfree(rss_config);
1389 1390 1391
	return ret;
}

L
Linus Torvalds 已提交
1392 1393 1394
static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_regs regs;
1395
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408
	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;

1409 1410 1411 1412 1413 1414
	regbuf = NULL;
	if (reglen) {
		regbuf = vzalloc(reglen);
		if (!regbuf)
			return -ENOMEM;
	}
L
Linus Torvalds 已提交
1415 1416 1417 1418 1419 1420 1421

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

	ret = -EFAULT;
	if (copy_to_user(useraddr, &regs, sizeof(regs)))
		goto out;
	useraddr += offsetof(struct ethtool_regs, data);
1422
	if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
L
Linus Torvalds 已提交
1423 1424 1425 1426
		goto out;
	ret = 0;

 out:
1427
	vfree(regbuf);
L
Linus Torvalds 已提交
1428 1429 1430
	return ret;
}

B
Ben Hutchings 已提交
1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450
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
1451 1452
static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
1453
	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
L
Linus Torvalds 已提交
1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477

	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);
}

1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511
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
1512 1513 1514 1515 1516 1517 1518 1519
static int ethtool_nway_reset(struct net_device *dev)
{
	if (!dev->ethtool_ops->nway_reset)
		return -EOPNOTSUPP;

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

1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
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;
}

1534 1535 1536 1537
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
1538 1539
{
	struct ethtool_eeprom eeprom;
1540 1541
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
1542
	u8 *data;
1543
	int ret = 0;
L
Linus Torvalds 已提交
1544 1545 1546 1547 1548 1549 1550 1551 1552

	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 */
1553
	if (eeprom.offset + eeprom.len > total_len)
L
Linus Torvalds 已提交
1554 1555
		return -EINVAL;

1556
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
1557 1558 1559
	if (!data)
		return -ENOMEM;

1560 1561 1562 1563
	bytes_remaining = eeprom.len;
	while (bytes_remaining > 0) {
		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

1564
		ret = getter(dev, &eeprom, data);
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574
		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
1575

1576 1577 1578 1579 1580
	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
1581 1582 1583 1584
	kfree(data);
	return ret;
}

1585 1586 1587 1588
static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

1589 1590
	if (!ops->get_eeprom || !ops->get_eeprom_len ||
	    !ops->get_eeprom_len(dev))
1591 1592 1593 1594 1595 1596
		return -EOPNOTSUPP;

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

L
Linus Torvalds 已提交
1597 1598 1599
static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
1600
	const struct ethtool_ops *ops = dev->ethtool_ops;
1601 1602
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
1603
	u8 *data;
1604
	int ret = 0;
L
Linus Torvalds 已提交
1605

1606 1607
	if (!ops->set_eeprom || !ops->get_eeprom_len ||
	    !ops->get_eeprom_len(dev))
L
Linus Torvalds 已提交
1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
		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;

1621
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
1622 1623 1624
	if (!data)
		return -ENOMEM;

1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639
	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
1640 1641 1642 1643 1644

	kfree(data);
	return ret;
}

1645 1646
static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1647
{
1648
	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
L
Linus Torvalds 已提交
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659

	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;
}

1660 1661
static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1662 1663 1664
{
	struct ethtool_coalesce coalesce;

1665
	if (!dev->ethtool_ops->set_coalesce)
L
Linus Torvalds 已提交
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
		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)
{
1676
	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
L
Linus Torvalds 已提交
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689

	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)
{
1690
	struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
L
Linus Torvalds 已提交
1691

1692
	if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
L
Linus Torvalds 已提交
1693 1694 1695 1696 1697
		return -EOPNOTSUPP;

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

1698 1699 1700 1701 1702 1703 1704 1705 1706
	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;

L
Linus Torvalds 已提交
1707 1708 1709
	return dev->ethtool_ops->set_ringparam(dev, &ringparam);
}

1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
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)
{
1728
	struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1729
	u32 max_rx_in_use = 0;
1730

1731
	if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1732 1733 1734 1735 1736
		return -EOPNOTSUPP;

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

1737 1738 1739 1740 1741 1742 1743 1744 1745
	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;

1746 1747 1748 1749 1750 1751 1752
	/* 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;

1753 1754 1755
	return dev->ethtool_ops->set_channels(dev, &channels);
}

L
Linus Torvalds 已提交
1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773
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;

1774
	if (!dev->ethtool_ops->set_pauseparam)
L
Linus Torvalds 已提交
1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785
		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;
1786
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1787
	u64 *data;
1788
	int ret, test_len;
L
Linus Torvalds 已提交
1789

1790
	if (!ops->self_test || !ops->get_sset_count)
L
Linus Torvalds 已提交
1791 1792
		return -EOPNOTSUPP;

1793
	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1794 1795 1796 1797
	if (test_len < 0)
		return test_len;
	WARN_ON(test_len == 0);

L
Linus Torvalds 已提交
1798 1799 1800
	if (copy_from_user(&test, useraddr, sizeof(test)))
		return -EFAULT;

1801 1802
	test.len = test_len;
	data = kmalloc(test_len * sizeof(u64), GFP_USER);
L
Linus Torvalds 已提交
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829
	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;

1830
	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1831 1832
	if (ret < 0)
		return ret;
1833 1834 1835
	if (ret > S32_MAX / ETH_GSTRING_LEN)
		return -ENOMEM;
	WARN_ON_ONCE(!ret);
1836 1837

	gstrings.len = ret;
1838 1839
	data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
	if (gstrings.len && !data)
L
Linus Torvalds 已提交
1840 1841
		return -ENOMEM;

1842
	__ethtool_get_strings(dev, gstrings.string_set, data);
L
Linus Torvalds 已提交
1843 1844 1845 1846 1847

	ret = -EFAULT;
	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
		goto out;
	useraddr += sizeof(gstrings);
1848 1849
	if (gstrings.len &&
	    copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
L
Linus Torvalds 已提交
1850 1851 1852
		goto out;
	ret = 0;

1853
out:
1854
	vfree(data);
L
Linus Torvalds 已提交
1855 1856 1857 1858 1859 1860
	return ret;
}

static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_value id;
1861
	static bool busy;
1862
	const struct ethtool_ops *ops = dev->ethtool_ops;
1863
	int rc;
L
Linus Torvalds 已提交
1864

1865
	if (!ops->set_phys_id)
L
Linus Torvalds 已提交
1866 1867
		return -EOPNOTSUPP;

1868 1869 1870
	if (busy)
		return -EBUSY;

L
Linus Torvalds 已提交
1871 1872 1873
	if (copy_from_user(&id, useraddr, sizeof(id)))
		return -EFAULT;

1874
	rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1875
	if (rc < 0)
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
		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(
1888
			id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1889
	} else {
1890 1891 1892 1893
		/* Driver expects to be called at twice the frequency in rc */
		int n = rc * 2, i, interval = HZ / n;

		/* Count down seconds */
1894
		do {
1895 1896 1897 1898
			/* Count down iterations per second */
			i = n;
			do {
				rtnl_lock();
1899
				rc = ops->set_phys_id(dev,
1900 1901 1902 1903 1904 1905
				    (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
				rtnl_unlock();
				if (rc)
					break;
				schedule_timeout_interruptible(interval);
			} while (!signal_pending(current) && --i != 0);
1906 1907 1908 1909 1910 1911 1912 1913
		} while (!signal_pending(current) &&
			 (id.data == 0 || --id.data != 0));
	}

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

1914
	(void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1915
	return rc;
L
Linus Torvalds 已提交
1916 1917 1918 1919 1920
}

static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_stats stats;
1921
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1922
	u64 *data;
1923
	int ret, n_stats;
L
Linus Torvalds 已提交
1924

1925
	if (!ops->get_ethtool_stats || !ops->get_sset_count)
L
Linus Torvalds 已提交
1926 1927
		return -EOPNOTSUPP;

1928
	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1929 1930
	if (n_stats < 0)
		return n_stats;
1931 1932 1933
	if (n_stats > S32_MAX / sizeof(u64))
		return -ENOMEM;
	WARN_ON_ONCE(!n_stats);
L
Linus Torvalds 已提交
1934 1935 1936
	if (copy_from_user(&stats, useraddr, sizeof(stats)))
		return -EFAULT;

1937
	stats.n_stats = n_stats;
1938 1939
	data = vzalloc(n_stats * sizeof(u64));
	if (n_stats && !data)
L
Linus Torvalds 已提交
1940 1941 1942 1943 1944 1945 1946 1947
		return -ENOMEM;

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

	ret = -EFAULT;
	if (copy_to_user(useraddr, &stats, sizeof(stats)))
		goto out;
	useraddr += sizeof(stats);
1948
	if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
L
Linus Torvalds 已提交
1949 1950 1951 1952
		goto out;
	ret = 0;

 out:
1953
	vfree(data);
L
Linus Torvalds 已提交
1954 1955 1956
	return ret;
}

A
Andrew Lunn 已提交
1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
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;
1970 1971 1972
	if (n_stats > S32_MAX / sizeof(u64))
		return -ENOMEM;
	WARN_ON_ONCE(!n_stats);
A
Andrew Lunn 已提交
1973 1974 1975 1976 1977

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

	stats.n_stats = n_stats;
1978 1979
	data = vzalloc(n_stats * sizeof(u64));
	if (n_stats && !data)
A
Andrew Lunn 已提交
1980 1981 1982 1983 1984 1985 1986 1987 1988 1989
		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);
1990
	if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
A
Andrew Lunn 已提交
1991 1992 1993 1994
		goto out;
	ret = 0;

 out:
1995
	vfree(data);
A
Andrew Lunn 已提交
1996 1997 1998
	return ret;
}

1999
static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2000 2001 2002
{
	struct ethtool_perm_addr epaddr;

2003
	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2004 2005
		return -EFAULT;

2006 2007 2008
	if (epaddr.size < dev->addr_len)
		return -ETOOSMALL;
	epaddr.size = dev->addr_len;
2009 2010

	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2011
		return -EFAULT;
2012
	useraddr += sizeof(epaddr);
2013 2014 2015
	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
		return -EFAULT;
	return 0;
2016 2017
}

2018 2019
static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
			     u32 cmd, u32 (*actor)(struct net_device *))
2020
{
2021
	struct ethtool_value edata = { .cmd = cmd };
2022

2023
	if (!actor)
2024 2025
		return -EOPNOTSUPP;

2026
	edata.data = actor(dev);
2027 2028 2029 2030 2031 2032

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

2033 2034
static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
			     void (*actor)(struct net_device *, u32))
2035 2036 2037
{
	struct ethtool_value edata;

2038
	if (!actor)
2039 2040 2041 2042 2043
		return -EOPNOTSUPP;

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

2044
	actor(dev, edata.data);
2045 2046 2047
	return 0;
}

2048 2049
static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
			     int (*actor)(struct net_device *, u32))
2050 2051 2052
{
	struct ethtool_value edata;

2053
	if (!actor)
2054 2055 2056 2057 2058
		return -EOPNOTSUPP;

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

2059
	return actor(dev, edata.data);
2060 2061
}

2062 2063
static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
						   char __user *useraddr)
2064 2065 2066 2067 2068 2069 2070 2071 2072
{
	struct ethtool_flash efl;

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

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

2073 2074
	efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;

2075 2076 2077
	return dev->ethtool_ops->flash_device(dev, &efl);
}

2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098
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;

2099
	if (!ops->get_dump_flag)
2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122
		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;

2123
	if (!ops->get_dump_data || !ops->get_dump_flag)
2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134
		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;

2135
	len = min(tmp.len, dump.len);
2136 2137 2138
	if (!len)
		return -EFAULT;

2139 2140 2141 2142 2143 2144 2145 2146 2147
	/* 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.
	 */
2148 2149 2150 2151 2152 2153 2154
	data = vzalloc(tmp.len);
	if (!data)
		return -ENOMEM;
	ret = ops->get_dump_data(dev, &dump, data);
	if (ret)
		goto out;

2155 2156 2157 2158 2159 2160 2161 2162 2163 2164
	/* 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;

2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176
	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;
}

2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188
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);
2189
	} else if (ops->get_ts_info) {
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206
		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;
}

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

2222 2223 2224 2225 2226 2227 2228 2229 2230
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;

2231
	ret = __ethtool_get_module_info(dev, &modinfo);
2232 2233 2234 2235 2236 2237 2238 2239 2240
	if (ret)
		return ret;

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

	return 0;
}

2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255
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;
}

2256 2257 2258 2259 2260 2261
static int ethtool_get_module_eeprom(struct net_device *dev,
				     void __user *useraddr)
{
	int ret;
	struct ethtool_modinfo modinfo;

2262
	ret = __ethtool_get_module_info(dev, &modinfo);
2263 2264 2265
	if (ret)
		return ret;

2266 2267
	return ethtool_get_any_eeprom(dev, useraddr,
				      __ethtool_get_module_eeprom,
2268 2269 2270
				      modinfo.eeprom_len);
}

2271 2272 2273 2274
static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
{
	switch (tuna->id) {
	case ETHTOOL_RX_COPYBREAK:
2275
	case ETHTOOL_TX_COPYBREAK:
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 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332
		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;
	useraddr += sizeof(tuna);
A
Al Viro 已提交
2333 2334 2335
	data = memdup_user(useraddr, tuna.len);
	if (IS_ERR(data))
		return PTR_ERR(data);
2336 2337 2338 2339 2340 2341
	ret = ops->set_tunable(dev, &tuna, data);

	kfree(data);
	return ret;
}

2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354
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);

2355 2356
	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
			  MAX_NUM_QUEUE);
2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371

	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;
}

2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387
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);

2388
	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427
	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;
}

2428 2429 2430 2431 2432 2433 2434 2435
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) {
2436 2437
	case ETHTOOL_GCOALESCE:
		return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2438 2439
	case ETHTOOL_SCOALESCE:
		return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2440 2441 2442 2443 2444
	default:
		return -EOPNOTSUPP;
	};
}

2445 2446 2447
static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
{
	switch (tuna->id) {
2448 2449 2450 2451 2452
	case ETHTOOL_PHY_DOWNSHIFT:
		if (tuna->len != sizeof(u8) ||
		    tuna->type_id != ETHTOOL_TUNABLE_U8)
			return -EINVAL;
		break;
2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477
	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;
2478
	mutex_lock(&phydev->lock);
2479
	ret = phydev->drv->get_tunable(phydev, &tuna, data);
2480
	mutex_unlock(&phydev->lock);
2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508
	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
2509 2510 2511
	data = memdup_user(useraddr, tuna.len);
	if (IS_ERR(data))
		return PTR_ERR(data);
2512
	mutex_lock(&phydev->lock);
2513
	ret = phydev->drv->set_tunable(phydev, &tuna, data);
2514
	mutex_unlock(&phydev->lock);
2515 2516 2517 2518 2519

	kfree(data);
	return ret;
}

2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546
static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };

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

	dev->ethtool_ops->get_fecparam(dev, &fecparam);

	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);
}

2547
/* The main entry point in this file.  Called from net/core/dev_ioctl.c */
L
Linus Torvalds 已提交
2548

2549
int dev_ethtool(struct net *net, struct ifreq *ifr)
L
Linus Torvalds 已提交
2550
{
2551
	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
L
Linus Torvalds 已提交
2552
	void __user *useraddr = ifr->ifr_data;
2553
	u32 ethcmd, sub_cmd;
L
Linus Torvalds 已提交
2554
	int rc;
2555
	netdev_features_t old_features;
L
Linus Torvalds 已提交
2556 2557 2558 2559

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

2560
	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
L
Linus Torvalds 已提交
2561 2562
		return -EFAULT;

2563 2564 2565 2566 2567 2568
	if (ethcmd == ETHTOOL_PERQUEUE) {
		if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
			return -EFAULT;
	} else {
		sub_cmd = ethcmd;
	}
2569
	/* Allow some commands to be done by anyone */
2570
	switch (sub_cmd) {
2571
	case ETHTOOL_GSET:
2572 2573
	case ETHTOOL_GDRVINFO:
	case ETHTOOL_GMSGLVL:
2574
	case ETHTOOL_GLINK:
2575 2576 2577 2578 2579 2580
	case ETHTOOL_GCOALESCE:
	case ETHTOOL_GRINGPARAM:
	case ETHTOOL_GPAUSEPARAM:
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
	case ETHTOOL_GSG:
2581
	case ETHTOOL_GSSET_INFO:
2582
	case ETHTOOL_GSTRINGS:
2583
	case ETHTOOL_GSTATS:
A
Andrew Lunn 已提交
2584
	case ETHTOOL_GPHYSTATS:
2585 2586 2587
	case ETHTOOL_GTSO:
	case ETHTOOL_GPERMADDR:
	case ETHTOOL_GGSO:
2588
	case ETHTOOL_GGRO:
2589 2590
	case ETHTOOL_GFLAGS:
	case ETHTOOL_GPFLAGS:
2591
	case ETHTOOL_GRXFH:
2592 2593 2594 2595
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
2596
	case ETHTOOL_GRXFHINDIR:
2597
	case ETHTOOL_GRSSH:
2598
	case ETHTOOL_GFEATURES:
2599
	case ETHTOOL_GCHANNELS:
2600
	case ETHTOOL_GET_TS_INFO:
2601
	case ETHTOOL_GEEE:
2602
	case ETHTOOL_GTUNABLE:
2603
	case ETHTOOL_PHY_GTUNABLE:
2604
	case ETHTOOL_GLINKSETTINGS:
2605
	case ETHTOOL_GFECPARAM:
2606 2607
		break;
	default:
2608
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2609 2610 2611
			return -EPERM;
	}

2612 2613 2614
	if (dev->ethtool_ops->begin) {
		rc = dev->ethtool_ops->begin(dev);
		if (rc  < 0)
L
Linus Torvalds 已提交
2615
			return rc;
2616
	}
2617 2618
	old_features = dev->features;

L
Linus Torvalds 已提交
2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638
	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:
2639 2640
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_msglevel);
L
Linus Torvalds 已提交
2641 2642
		break;
	case ETHTOOL_SMSGLVL:
2643 2644
		rc = ethtool_set_value_void(dev, useraddr,
				       dev->ethtool_ops->set_msglevel);
L
Linus Torvalds 已提交
2645
		break;
2646 2647 2648 2649 2650 2651
	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
2652 2653 2654 2655
	case ETHTOOL_NWAY_RST:
		rc = ethtool_nway_reset(dev);
		break;
	case ETHTOOL_GLINK:
2656
		rc = ethtool_get_link(dev, useraddr);
L
Linus Torvalds 已提交
2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693
		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;
2694 2695 2696
	case ETHTOOL_GPERMADDR:
		rc = ethtool_get_perm_addr(dev, useraddr);
		break;
2697
	case ETHTOOL_GFLAGS:
2698
		rc = ethtool_get_value(dev, useraddr, ethcmd,
M
Michał Mirosław 已提交
2699
					__ethtool_get_flags);
2700 2701
		break;
	case ETHTOOL_SFLAGS:
2702
		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2703
		break;
2704
	case ETHTOOL_GPFLAGS:
2705 2706
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_priv_flags);
2707 2708
		break;
	case ETHTOOL_SPFLAGS:
2709 2710
		rc = ethtool_set_value(dev, useraddr,
				       dev->ethtool_ops->set_priv_flags);
2711
		break;
2712
	case ETHTOOL_GRXFH:
2713 2714 2715 2716
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
2717
		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2718 2719
		break;
	case ETHTOOL_SRXFH:
2720 2721
	case ETHTOOL_SRXCLSRLDEL:
	case ETHTOOL_SRXCLSRLINS:
2722
		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2723
		break;
2724 2725 2726
	case ETHTOOL_FLASHDEV:
		rc = ethtool_flash_device(dev, useraddr);
		break;
B
Ben Hutchings 已提交
2727 2728 2729
	case ETHTOOL_RESET:
		rc = ethtool_reset(dev, useraddr);
		break;
2730 2731 2732
	case ETHTOOL_GSSET_INFO:
		rc = ethtool_get_sset_info(dev, useraddr);
		break;
2733 2734 2735 2736 2737 2738
	case ETHTOOL_GRXFHINDIR:
		rc = ethtool_get_rxfh_indir(dev, useraddr);
		break;
	case ETHTOOL_SRXFHINDIR:
		rc = ethtool_set_rxfh_indir(dev, useraddr);
		break;
2739 2740 2741 2742 2743 2744
	case ETHTOOL_GRSSH:
		rc = ethtool_get_rxfh(dev, useraddr);
		break;
	case ETHTOOL_SRSSH:
		rc = ethtool_set_rxfh(dev, useraddr);
		break;
2745 2746 2747 2748 2749 2750
	case ETHTOOL_GFEATURES:
		rc = ethtool_get_features(dev, useraddr);
		break;
	case ETHTOOL_SFEATURES:
		rc = ethtool_set_features(dev, useraddr);
		break;
2751
	case ETHTOOL_GTXCSUM:
2752
	case ETHTOOL_GRXCSUM:
2753 2754 2755 2756 2757 2758 2759
	case ETHTOOL_GSG:
	case ETHTOOL_GTSO:
	case ETHTOOL_GGSO:
	case ETHTOOL_GGRO:
		rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
		break;
	case ETHTOOL_STXCSUM:
2760
	case ETHTOOL_SRXCSUM:
2761 2762 2763 2764 2765 2766
	case ETHTOOL_SSG:
	case ETHTOOL_STSO:
	case ETHTOOL_SGSO:
	case ETHTOOL_SGRO:
		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
		break;
2767 2768 2769 2770 2771 2772
	case ETHTOOL_GCHANNELS:
		rc = ethtool_get_channels(dev, useraddr);
		break;
	case ETHTOOL_SCHANNELS:
		rc = ethtool_set_channels(dev, useraddr);
		break;
2773 2774 2775 2776 2777 2778 2779 2780 2781
	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;
2782 2783 2784
	case ETHTOOL_GET_TS_INFO:
		rc = ethtool_get_ts_info(dev, useraddr);
		break;
2785 2786 2787 2788 2789 2790
	case ETHTOOL_GMODULEINFO:
		rc = ethtool_get_module_info(dev, useraddr);
		break;
	case ETHTOOL_GMODULEEEPROM:
		rc = ethtool_get_module_eeprom(dev, useraddr);
		break;
2791 2792 2793 2794 2795 2796
	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
2797 2798 2799
	case ETHTOOL_GPHYSTATS:
		rc = ethtool_get_phy_stats(dev, useraddr);
		break;
2800 2801 2802
	case ETHTOOL_PERQUEUE:
		rc = ethtool_set_per_queue(dev, useraddr);
		break;
2803 2804 2805 2806 2807 2808
	case ETHTOOL_GLINKSETTINGS:
		rc = ethtool_get_link_ksettings(dev, useraddr);
		break;
	case ETHTOOL_SLINKSETTINGS:
		rc = ethtool_set_link_ksettings(dev, useraddr);
		break;
2809 2810 2811 2812 2813 2814
	case ETHTOOL_PHY_GTUNABLE:
		rc = get_phy_tunable(dev, useraddr);
		break;
	case ETHTOOL_PHY_STUNABLE:
		rc = set_phy_tunable(dev, useraddr);
		break;
2815 2816 2817 2818 2819 2820
	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
2821
	default:
2822
		rc = -EOPNOTSUPP;
L
Linus Torvalds 已提交
2823
	}
2824

2825
	if (dev->ethtool_ops->complete)
L
Linus Torvalds 已提交
2826
		dev->ethtool_ops->complete(dev);
2827 2828 2829 2830

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

L
Linus Torvalds 已提交
2831 2832
	return rc;
}