ethtool.c 46.6 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>
#include <linux/sched.h>
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/*
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 * Some useful ethtool_ops methods that're device independent.
 * If we find that all drivers want to do the same thing here,
 * we can turn these into dev_() function calls.
 */

u32 ethtool_op_get_link(struct net_device *dev)
{
	return netif_carrier_ok(dev) ? 1 : 0;
}
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EXPORT_SYMBOL(ethtool_op_get_link);
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int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
{
	info->so_timestamping =
		SOF_TIMESTAMPING_TX_SOFTWARE |
		SOF_TIMESTAMPING_RX_SOFTWARE |
		SOF_TIMESTAMPING_SOFTWARE;
	info->phc_index = -1;
	return 0;
}
EXPORT_SYMBOL(ethtool_op_get_ts_info);

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/* Handlers for each ethtool command */

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#define ETHTOOL_DEV_FEATURE_WORDS	((NETDEV_FEATURE_COUNT + 31) / 32)
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static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
	[NETIF_F_SG_BIT] =               "tx-scatter-gather",
	[NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
	[NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
	[NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
	[NETIF_F_HIGHDMA_BIT] =          "highdma",
	[NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
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	[NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
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	[NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
	[NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
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	[NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
	[NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
	[NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
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	[NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
	[NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
	[NETIF_F_LLTX_BIT] =             "tx-lockless",
	[NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
	[NETIF_F_GRO_BIT] =              "rx-gro",
	[NETIF_F_LRO_BIT] =              "rx-lro",

	[NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
	[NETIF_F_UFO_BIT] =              "tx-udp-fragmentation",
	[NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
	[NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
	[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_IPIP_BIT] =	 "tx-ipip-segmentation",
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	[NETIF_F_GSO_SIT_BIT] =		 "tx-sit-segmentation",
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	[NETIF_F_GSO_UDP_TUNNEL_BIT] =	 "tx-udp_tnl-segmentation",
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	[NETIF_F_GSO_MPLS_BIT] =	 "tx-mpls-segmentation",
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	[NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
	[NETIF_F_SCTP_CSUM_BIT] =        "tx-checksum-sctp",
	[NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
	[NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
	[NETIF_F_RXHASH_BIT] =           "rx-hashing",
	[NETIF_F_RXCSUM_BIT] =           "rx-checksum",
	[NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
	[NETIF_F_LOOPBACK_BIT] =         "loopback",
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	[NETIF_F_RXFCS_BIT] =            "rx-fcs",
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	[NETIF_F_RXALL_BIT] =            "rx-all",
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	[NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
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	[NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
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};

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

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

	if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
		copy_size = ETHTOOL_DEV_FEATURE_WORDS;

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

	return 0;
}

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

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

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

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

	if (valid & ~NETIF_F_ETHTOOL_BITS)
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		return -EINVAL;

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

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

	return ret;
}

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

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

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	if (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));
	else
		/* 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:
		return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
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	case ETHTOOL_GRXCSUM:
	case ETHTOOL_SRXCSUM:
		return NETIF_F_RXCSUM;
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	case ETHTOOL_GSG:
	case ETHTOOL_SSG:
		return NETIF_F_SG;
	case ETHTOOL_GTSO:
	case ETHTOOL_STSO:
		return NETIF_F_ALL_TSO;
	case ETHTOOL_GUFO:
	case ETHTOOL_SUFO:
		return NETIF_F_UFO;
	case ETHTOOL_GGSO:
	case ETHTOOL_SGSO:
		return NETIF_F_GSO;
	case ETHTOOL_GGRO:
	case ETHTOOL_SGRO:
		return NETIF_F_GRO;
	default:
		BUG();
	}
}

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

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

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

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

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

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

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

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

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

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int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
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{
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	ASSERT_RTNL();
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	if (!dev->ethtool_ops->get_settings)
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		return -EOPNOTSUPP;

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	memset(cmd, 0, sizeof(struct ethtool_cmd));
	cmd->cmd = ETHTOOL_GSET;
	return dev->ethtool_ops->get_settings(dev, cmd);
}
EXPORT_SYMBOL(__ethtool_get_settings);

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

	err = __ethtool_get_settings(dev, &cmd);
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	if (err < 0)
		return err;

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

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

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

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

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

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

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

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

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static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
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						    void __user *useraddr)
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{
	struct ethtool_sset_info info;
	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 */
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	n_bits = hweight64(sset_mask);
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	memset(&info, 0, sizeof(info));
	info.cmd = ETHTOOL_GSSET_INFO;

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

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

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

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

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

	ret = 0;

out:
	kfree(info_buf);
	return ret;
}

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

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

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

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	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;
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}

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

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

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

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

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

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

err_out:
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	kfree(rule_buf);
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	return ret;
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}

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static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
					struct ethtool_rxnfc *rx_rings,
					u32 size)
{
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	int i;
565 566

	if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
567
		return -EFAULT;
568 569

	/* Validate ring indices */
570 571 572 573 574
	for (i = 0; i < size; i++)
		if (indir[i] >= rx_rings->data)
			return -EINVAL;

	return 0;
575 576
}

577 578 579
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
580 581
	u32 user_size, dev_size;
	u32 *indir;
582 583
	int ret;

584
	if (!dev->ethtool_ops->get_rxfh_indir_size ||
585
	    !dev->ethtool_ops->get_rxfh)
586 587 588
		return -EOPNOTSUPP;
	dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
	if (dev_size == 0)
589 590
		return -EOPNOTSUPP;

591
	if (copy_from_user(&user_size,
592
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
593
			   sizeof(user_size)))
594 595
		return -EFAULT;

596 597 598 599 600 601 602 603 604 605 606 607
	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);
608 609 610
	if (!indir)
		return -ENOMEM;

611
	ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL);
612 613 614
	if (ret)
		goto out;

615 616 617
	if (copy_to_user(useraddr +
			 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
			 indir, dev_size * sizeof(indir[0])))
618 619 620 621 622 623 624 625 626 627
		ret = -EFAULT;

out:
	kfree(indir);
	return ret;
}

static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
628 629 630
	struct ethtool_rxnfc rx_rings;
	u32 user_size, dev_size, i;
	u32 *indir;
631
	const struct ethtool_ops *ops = dev->ethtool_ops;
632
	int ret;
633
	u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
634

635
	if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
636
	    !ops->get_rxnfc)
637
		return -EOPNOTSUPP;
638 639

	dev_size = ops->get_rxfh_indir_size(dev);
640
	if (dev_size == 0)
641 642
		return -EOPNOTSUPP;

643
	if (copy_from_user(&user_size,
644
			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
645
			   sizeof(user_size)))
646 647
		return -EFAULT;

648
	if (user_size != 0 && user_size != dev_size)
649 650 651
		return -EINVAL;

	indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
652 653 654
	if (!indir)
		return -ENOMEM;

655
	rx_rings.cmd = ETHTOOL_GRXRINGS;
656
	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
657 658
	if (ret)
		goto out;
659 660 661 662 663

	if (user_size == 0) {
		for (i = 0; i < dev_size; i++)
			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
	} else {
664 665 666 667 668 669 670 671
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + ringidx_offset,
						  &rx_rings,
						  dev_size);
		if (ret)
			goto out;
	}

672
	ret = ops->set_rxfh(dev, indir, NULL);
673 674 675 676 677 678 679 680 681 682 683

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;
684
	u32 user_indir_size, user_key_size;
685
	u32 dev_indir_size = 0, dev_key_size = 0;
686
	struct ethtool_rxfh rxfh;
687
	u32 total_size;
688
	u32 indir_bytes;
689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
	u32 *indir = NULL;
	u8 *hkey = NULL;
	u8 *rss_config;

	if (!(dev->ethtool_ops->get_rxfh_indir_size ||
	      dev->ethtool_ops->get_rxfh_key_size) ||
	      !dev->ethtool_ops->get_rxfh)
		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);

	if ((dev_key_size + dev_indir_size) == 0)
		return -EOPNOTSUPP;

706
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
707
		return -EFAULT;
708 709
	user_indir_size = rxfh.indir_size;
	user_key_size = rxfh.key_size;
710

711 712 713 714 715 716 717
	/* Check that reserved fields are 0 for now */
	if (rxfh.rss_context || rxfh.rsvd[0] || rxfh.rsvd[1])
		return -EINVAL;

	rxfh.indir_size = dev_indir_size;
	rxfh.key_size = dev_key_size;
	if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
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
		return -EFAULT;

	/* If the user buffer size is 0, this is just a query for the
	 * device table size and key size.  Otherwise, if the User size is
	 * not equal to device table size or key size it's an error.
	 */
	if (!user_indir_size && !user_key_size)
		return 0;

	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;

	ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey);
	if (!ret) {
		if (copy_to_user(useraddr +
				 offsetof(struct ethtool_rxfh, rss_config[0]),
				 rss_config, total_size))
748
			ret = -EFAULT;
749 750 751 752 753 754 755 756 757 758 759 760 761
	}

	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;
762 763
	struct ethtool_rxfh rxfh;
	u32 dev_indir_size = 0, dev_key_size = 0, i;
764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779
	u32 *indir = NULL, indir_bytes = 0;
	u8 *hkey = NULL;
	u8 *rss_config;
	u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);

	if (!(ops->get_rxfh_indir_size || ops->get_rxfh_key_size) ||
	    !ops->get_rxnfc || !ops->set_rxfh)
		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 = dev->ethtool_ops->get_rxfh_key_size(dev);
	if ((dev_key_size + dev_indir_size) == 0)
		return -EOPNOTSUPP;

780
	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
781 782
		return -EFAULT;

783 784 785 786
	/* Check that reserved fields are 0 for now */
	if (rxfh.rss_context || rxfh.rsvd[0] || rxfh.rsvd[1])
		return -EINVAL;

787
	/* If either indir or hash key is valid, proceed further.
788
	 * It is not valid to request that both be unchanged.
789
	 */
790 791 792 793 794 795
	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 &&
	     rxfh.key_size == 0))
796 797
		return -EINVAL;

798
	if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
799 800
		indir_bytes = dev_indir_size * sizeof(indir[0]);

801
	rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
802 803 804 805 806 807 808 809
	if (!rss_config)
		return -ENOMEM;

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

810 811
	/* rxfh.indir_size == 0 means reset the indir table to default.
	 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
812
	 */
813 814
	if (rxfh.indir_size &&
	    rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
815 816 817 818
		indir = (u32 *)rss_config;
		ret = ethtool_copy_validate_indir(indir,
						  useraddr + rss_cfg_offset,
						  &rx_rings,
819
						  rxfh.indir_size);
820
		if (ret)
821
			goto out;
822
	} else if (rxfh.indir_size == 0) {
823 824 825 826
		indir = (u32 *)rss_config;
		for (i = 0; i < dev_indir_size; i++)
			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
	}
827

828
	if (rxfh.key_size) {
829 830 831
		hkey = rss_config + indir_bytes;
		if (copy_from_user(hkey,
				   useraddr + rss_cfg_offset + indir_bytes,
832
				   rxfh.key_size)) {
833 834
			ret = -EFAULT;
			goto out;
835
		}
836 837
	}

838
	ret = ops->set_rxfh(dev, indir, hkey);
839 840

out:
841
	kfree(rss_config);
842 843 844
	return ret;
}

L
Linus Torvalds 已提交
845 846 847
static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_regs regs;
848
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
849 850 851 852 853 854 855 856 857 858 859 860 861
	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;

862
	regbuf = vzalloc(reglen);
863
	if (reglen && !regbuf)
L
Linus Torvalds 已提交
864 865 866 867 868 869 870 871
		return -ENOMEM;

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

	ret = -EFAULT;
	if (copy_to_user(useraddr, &regs, sizeof(regs)))
		goto out;
	useraddr += offsetof(struct ethtool_regs, data);
872
	if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
L
Linus Torvalds 已提交
873 874 875 876
		goto out;
	ret = 0;

 out:
877
	vfree(regbuf);
L
Linus Torvalds 已提交
878 879 880
	return ret;
}

B
Ben Hutchings 已提交
881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900
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
901 902
static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
903
	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
L
Linus Torvalds 已提交
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927

	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);
}

928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961
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
962 963 964 965 966 967 968 969
static int ethtool_nway_reset(struct net_device *dev)
{
	if (!dev->ethtool_ops->nway_reset)
		return -EOPNOTSUPP;

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

970 971 972 973 974 975 976 977 978 979 980 981 982 983
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;
}

984 985 986 987
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
988 989
{
	struct ethtool_eeprom eeprom;
990 991
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
992
	u8 *data;
993
	int ret = 0;
L
Linus Torvalds 已提交
994 995 996 997 998 999 1000 1001 1002

	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 */
1003
	if (eeprom.offset + eeprom.len > total_len)
L
Linus Torvalds 已提交
1004 1005
		return -EINVAL;

1006
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
1007 1008 1009
	if (!data)
		return -ENOMEM;

1010 1011 1012 1013
	bytes_remaining = eeprom.len;
	while (bytes_remaining > 0) {
		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

1014
		ret = getter(dev, &eeprom, data);
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
		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
1025

1026 1027 1028 1029 1030
	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
1031 1032 1033 1034
	kfree(data);
	return ret;
}

1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

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

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

L
Linus Torvalds 已提交
1046 1047 1048
static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
1049
	const struct ethtool_ops *ops = dev->ethtool_ops;
1050 1051
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
L
Linus Torvalds 已提交
1052
	u8 *data;
1053
	int ret = 0;
L
Linus Torvalds 已提交
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068

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

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

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

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

1069
	data = kmalloc(PAGE_SIZE, GFP_USER);
L
Linus Torvalds 已提交
1070 1071 1072
	if (!data)
		return -ENOMEM;

1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
	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
1088 1089 1090 1091 1092

	kfree(data);
	return ret;
}

1093 1094
static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1095
{
1096
	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
L
Linus Torvalds 已提交
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107

	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;
}

1108 1109
static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
						   void __user *useraddr)
L
Linus Torvalds 已提交
1110 1111 1112
{
	struct ethtool_coalesce coalesce;

1113
	if (!dev->ethtool_ops->set_coalesce)
L
Linus Torvalds 已提交
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123
		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)
{
1124
	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
L
Linus Torvalds 已提交
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148

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

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

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

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

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

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

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

1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
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)
{
	struct ethtool_channels channels;

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

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

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

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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;

1196
	if (!dev->ethtool_ops->set_pauseparam)
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		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;
1208
	const struct ethtool_ops *ops = dev->ethtool_ops;
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1209
	u64 *data;
1210
	int ret, test_len;
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1211

1212
	if (!ops->self_test || !ops->get_sset_count)
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		return -EOPNOTSUPP;

1215
	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1216 1217 1218 1219
	if (test_len < 0)
		return test_len;
	WARN_ON(test_len == 0);

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1220 1221 1222
	if (copy_from_user(&test, useraddr, sizeof(test)))
		return -EFAULT;

1223 1224
	test.len = test_len;
	data = kmalloc(test_len * sizeof(u64), GFP_USER);
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1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
	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;

1252
	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1253 1254 1255 1256
	if (ret < 0)
		return ret;

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

1262
	__ethtool_get_strings(dev, gstrings.string_set, data);
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	ret = -EFAULT;
	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
		goto out;
	useraddr += sizeof(gstrings);
	if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
		goto out;
	ret = 0;

1272
out:
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	kfree(data);
	return ret;
}

static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_value id;
1280
	static bool busy;
1281
	const struct ethtool_ops *ops = dev->ethtool_ops;
1282
	int rc;
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1284
	if (!ops->set_phys_id)
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		return -EOPNOTSUPP;

1287 1288 1289
	if (busy)
		return -EBUSY;

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

1293
	rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1294
	if (rc < 0)
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
		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(
1307
			id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1308
	} else {
1309 1310 1311 1312
		/* Driver expects to be called at twice the frequency in rc */
		int n = rc * 2, i, interval = HZ / n;

		/* Count down seconds */
1313
		do {
1314 1315 1316 1317
			/* Count down iterations per second */
			i = n;
			do {
				rtnl_lock();
1318
				rc = ops->set_phys_id(dev,
1319 1320 1321 1322 1323 1324
				    (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
				rtnl_unlock();
				if (rc)
					break;
				schedule_timeout_interruptible(interval);
			} while (!signal_pending(current) && --i != 0);
1325 1326 1327 1328 1329 1330 1331 1332
		} while (!signal_pending(current) &&
			 (id.data == 0 || --id.data != 0));
	}

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

1333
	(void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1334
	return rc;
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}

static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_stats stats;
1340
	const struct ethtool_ops *ops = dev->ethtool_ops;
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	u64 *data;
1342
	int ret, n_stats;
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1343

1344
	if (!ops->get_ethtool_stats || !ops->get_sset_count)
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		return -EOPNOTSUPP;

1347
	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1348 1349 1350 1351
	if (n_stats < 0)
		return n_stats;
	WARN_ON(n_stats == 0);

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

1355 1356
	stats.n_stats = n_stats;
	data = kmalloc(n_stats * sizeof(u64), GFP_USER);
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	if (!data)
		return -ENOMEM;

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

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

 out:
	kfree(data);
	return ret;
}

1375
static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1376 1377 1378
{
	struct ethtool_perm_addr epaddr;

1379
	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1380 1381
		return -EFAULT;

1382 1383 1384
	if (epaddr.size < dev->addr_len)
		return -ETOOSMALL;
	epaddr.size = dev->addr_len;
1385 1386

	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1387
		return -EFAULT;
1388
	useraddr += sizeof(epaddr);
1389 1390 1391
	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
		return -EFAULT;
	return 0;
1392 1393
}

1394 1395
static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
			     u32 cmd, u32 (*actor)(struct net_device *))
1396
{
1397
	struct ethtool_value edata = { .cmd = cmd };
1398

1399
	if (!actor)
1400 1401
		return -EOPNOTSUPP;

1402
	edata.data = actor(dev);
1403 1404 1405 1406 1407 1408

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

1409 1410
static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
			     void (*actor)(struct net_device *, u32))
1411 1412 1413
{
	struct ethtool_value edata;

1414
	if (!actor)
1415 1416 1417 1418 1419
		return -EOPNOTSUPP;

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

1420
	actor(dev, edata.data);
1421 1422 1423
	return 0;
}

1424 1425
static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
			     int (*actor)(struct net_device *, u32))
1426 1427 1428
{
	struct ethtool_value edata;

1429
	if (!actor)
1430 1431 1432 1433 1434
		return -EOPNOTSUPP;

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

1435
	return actor(dev, edata.data);
1436 1437
}

1438 1439
static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
						   char __user *useraddr)
1440 1441 1442 1443 1444 1445 1446 1447 1448
{
	struct ethtool_flash efl;

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

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

1449 1450
	efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;

1451 1452 1453
	return dev->ethtool_ops->flash_device(dev, &efl);
}

1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474
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;

1475
	if (!ops->get_dump_flag)
1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
		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;

1499
	if (!ops->get_dump_data || !ops->get_dump_flag)
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510
		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;

1511
	len = min(tmp.len, dump.len);
1512 1513 1514
	if (!len)
		return -EFAULT;

1515 1516 1517 1518 1519 1520 1521 1522 1523
	/* 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.
	 */
1524 1525 1526 1527 1528 1529 1530
	data = vzalloc(tmp.len);
	if (!data)
		return -ENOMEM;
	ret = ops->get_dump_data(dev, &dump, data);
	if (ret)
		goto out;

1531 1532 1533 1534 1535 1536 1537 1538 1539 1540
	/* 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;

1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552
	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;
}

1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564
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);
1565
	} else if (ops->get_ts_info) {
1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582
		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;
}

1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623
static int ethtool_get_module_info(struct net_device *dev,
				   void __user *useraddr)
{
	int ret;
	struct ethtool_modinfo modinfo;
	const struct ethtool_ops *ops = dev->ethtool_ops;

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

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

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

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

	return 0;
}

static int ethtool_get_module_eeprom(struct net_device *dev,
				     void __user *useraddr)
{
	int ret;
	struct ethtool_modinfo modinfo;
	const struct ethtool_ops *ops = dev->ethtool_ops;

	if (!ops->get_module_info || !ops->get_module_eeprom)
		return -EOPNOTSUPP;

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

	return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
				      modinfo.eeprom_len);
}

1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697
static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
{
	switch (tuna->id) {
	case ETHTOOL_RX_COPYBREAK:
		if (tuna->len != sizeof(u32) ||
		    tuna->type_id != ETHTOOL_TUNABLE_U32)
			return -EINVAL;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

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

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

out:
	kfree(data);
	return ret;
}

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

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

out:
	kfree(data);
	return ret;
}

1698
/* The main entry point in this file.  Called from net/core/dev_ioctl.c */
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1699

1700
int dev_ethtool(struct net *net, struct ifreq *ifr)
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1701
{
1702
	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
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1703 1704 1705
	void __user *useraddr = ifr->ifr_data;
	u32 ethcmd;
	int rc;
1706
	netdev_features_t old_features;
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1707 1708 1709 1710

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

1711
	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
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1712 1713
		return -EFAULT;

1714
	/* Allow some commands to be done by anyone */
1715
	switch (ethcmd) {
1716
	case ETHTOOL_GSET:
1717 1718
	case ETHTOOL_GDRVINFO:
	case ETHTOOL_GMSGLVL:
1719
	case ETHTOOL_GLINK:
1720 1721 1722 1723 1724 1725
	case ETHTOOL_GCOALESCE:
	case ETHTOOL_GRINGPARAM:
	case ETHTOOL_GPAUSEPARAM:
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
	case ETHTOOL_GSG:
1726
	case ETHTOOL_GSSET_INFO:
1727
	case ETHTOOL_GSTRINGS:
1728
	case ETHTOOL_GSTATS:
1729 1730 1731 1732
	case ETHTOOL_GTSO:
	case ETHTOOL_GPERMADDR:
	case ETHTOOL_GUFO:
	case ETHTOOL_GGSO:
1733
	case ETHTOOL_GGRO:
1734 1735
	case ETHTOOL_GFLAGS:
	case ETHTOOL_GPFLAGS:
1736
	case ETHTOOL_GRXFH:
1737 1738 1739 1740
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
1741
	case ETHTOOL_GRXFHINDIR:
1742
	case ETHTOOL_GRSSH:
1743
	case ETHTOOL_GFEATURES:
1744
	case ETHTOOL_GCHANNELS:
1745
	case ETHTOOL_GET_TS_INFO:
1746
	case ETHTOOL_GEEE:
1747
	case ETHTOOL_GTUNABLE:
1748 1749
		break;
	default:
1750
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1751 1752 1753
			return -EPERM;
	}

1754 1755 1756
	if (dev->ethtool_ops->begin) {
		rc = dev->ethtool_ops->begin(dev);
		if (rc  < 0)
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1757
			return rc;
1758
	}
1759 1760
	old_features = dev->features;

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1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780
	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:
1781 1782
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_msglevel);
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Linus Torvalds 已提交
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		break;
	case ETHTOOL_SMSGLVL:
1785 1786
		rc = ethtool_set_value_void(dev, useraddr,
				       dev->ethtool_ops->set_msglevel);
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Linus Torvalds 已提交
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		break;
1788 1789 1790 1791 1792 1793
	case ETHTOOL_GEEE:
		rc = ethtool_get_eee(dev, useraddr);
		break;
	case ETHTOOL_SEEE:
		rc = ethtool_set_eee(dev, useraddr);
		break;
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1794 1795 1796 1797
	case ETHTOOL_NWAY_RST:
		rc = ethtool_nway_reset(dev);
		break;
	case ETHTOOL_GLINK:
1798
		rc = ethtool_get_link(dev, useraddr);
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1799 1800 1801 1802 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 1830 1831 1832 1833 1834 1835
		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;
1836 1837 1838
	case ETHTOOL_GPERMADDR:
		rc = ethtool_get_perm_addr(dev, useraddr);
		break;
1839
	case ETHTOOL_GFLAGS:
1840
		rc = ethtool_get_value(dev, useraddr, ethcmd,
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Michał Mirosław 已提交
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					__ethtool_get_flags);
1842 1843
		break;
	case ETHTOOL_SFLAGS:
1844
		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1845
		break;
1846
	case ETHTOOL_GPFLAGS:
1847 1848
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_priv_flags);
1849 1850
		break;
	case ETHTOOL_SPFLAGS:
1851 1852
		rc = ethtool_set_value(dev, useraddr,
				       dev->ethtool_ops->set_priv_flags);
1853
		break;
1854
	case ETHTOOL_GRXFH:
1855 1856 1857 1858
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
1859
		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1860 1861
		break;
	case ETHTOOL_SRXFH:
1862 1863
	case ETHTOOL_SRXCLSRLDEL:
	case ETHTOOL_SRXCLSRLINS:
1864
		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1865
		break;
1866 1867 1868
	case ETHTOOL_FLASHDEV:
		rc = ethtool_flash_device(dev, useraddr);
		break;
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1869 1870 1871
	case ETHTOOL_RESET:
		rc = ethtool_reset(dev, useraddr);
		break;
1872 1873 1874
	case ETHTOOL_GSSET_INFO:
		rc = ethtool_get_sset_info(dev, useraddr);
		break;
1875 1876 1877 1878 1879 1880
	case ETHTOOL_GRXFHINDIR:
		rc = ethtool_get_rxfh_indir(dev, useraddr);
		break;
	case ETHTOOL_SRXFHINDIR:
		rc = ethtool_set_rxfh_indir(dev, useraddr);
		break;
1881 1882 1883 1884 1885 1886
	case ETHTOOL_GRSSH:
		rc = ethtool_get_rxfh(dev, useraddr);
		break;
	case ETHTOOL_SRSSH:
		rc = ethtool_set_rxfh(dev, useraddr);
		break;
1887 1888 1889 1890 1891 1892
	case ETHTOOL_GFEATURES:
		rc = ethtool_get_features(dev, useraddr);
		break;
	case ETHTOOL_SFEATURES:
		rc = ethtool_set_features(dev, useraddr);
		break;
1893
	case ETHTOOL_GTXCSUM:
1894
	case ETHTOOL_GRXCSUM:
1895 1896 1897 1898 1899 1900 1901 1902
	case ETHTOOL_GSG:
	case ETHTOOL_GTSO:
	case ETHTOOL_GUFO:
	case ETHTOOL_GGSO:
	case ETHTOOL_GGRO:
		rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
		break;
	case ETHTOOL_STXCSUM:
1903
	case ETHTOOL_SRXCSUM:
1904 1905 1906 1907 1908 1909 1910
	case ETHTOOL_SSG:
	case ETHTOOL_STSO:
	case ETHTOOL_SUFO:
	case ETHTOOL_SGSO:
	case ETHTOOL_SGRO:
		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
		break;
1911 1912 1913 1914 1915 1916
	case ETHTOOL_GCHANNELS:
		rc = ethtool_get_channels(dev, useraddr);
		break;
	case ETHTOOL_SCHANNELS:
		rc = ethtool_set_channels(dev, useraddr);
		break;
1917 1918 1919 1920 1921 1922 1923 1924 1925
	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;
1926 1927 1928
	case ETHTOOL_GET_TS_INFO:
		rc = ethtool_get_ts_info(dev, useraddr);
		break;
1929 1930 1931 1932 1933 1934
	case ETHTOOL_GMODULEINFO:
		rc = ethtool_get_module_info(dev, useraddr);
		break;
	case ETHTOOL_GMODULEEEPROM:
		rc = ethtool_get_module_eeprom(dev, useraddr);
		break;
1935 1936 1937 1938 1939 1940
	case ETHTOOL_GTUNABLE:
		rc = ethtool_get_tunable(dev, useraddr);
		break;
	case ETHTOOL_STUNABLE:
		rc = ethtool_set_tunable(dev, useraddr);
		break;
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Linus Torvalds 已提交
1941
	default:
1942
		rc = -EOPNOTSUPP;
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1943
	}
1944

1945
	if (dev->ethtool_ops->complete)
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		dev->ethtool_ops->complete(dev);
1947 1948 1949 1950

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

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1951 1952
	return rc;
}