ethtool.c 45.2 KB
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/*
 * net/core/ethtool.c - Ethtool ioctl handler
 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
 *
 * This file is where we call all the ethtool_ops commands to get
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 * the information ethtool needs.
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 *
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 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
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 */

#include <linux/module.h>
#include <linux/types.h>
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#include <linux/capability.h>
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#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
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#include <linux/bitops.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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/*
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 * Some useful ethtool_ops methods that're device independent.
 * If we find that all drivers want to do the same thing here,
 * we can turn these into dev_() function calls.
 */

u32 ethtool_op_get_link(struct net_device *dev)
{
	return netif_carrier_ok(dev) ? 1 : 0;
}
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EXPORT_SYMBOL(ethtool_op_get_link);
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u32 ethtool_op_get_tx_csum(struct net_device *dev)
{
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	return (dev->features & NETIF_F_ALL_CSUM) != 0;
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}
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EXPORT_SYMBOL(ethtool_op_get_tx_csum);
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int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_IP_CSUM;
	else
		dev->features &= ~NETIF_F_IP_CSUM;

	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_tx_csum);
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int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_HW_CSUM;
	else
		dev->features &= ~NETIF_F_HW_CSUM;

	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
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int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
	else
		dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);

	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
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u32 ethtool_op_get_sg(struct net_device *dev)
{
	return (dev->features & NETIF_F_SG) != 0;
}
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EXPORT_SYMBOL(ethtool_op_get_sg);
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int ethtool_op_set_sg(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_SG;
	else
		dev->features &= ~NETIF_F_SG;

	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_sg);
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u32 ethtool_op_get_tso(struct net_device *dev)
{
	return (dev->features & NETIF_F_TSO) != 0;
}
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EXPORT_SYMBOL(ethtool_op_get_tso);
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int ethtool_op_set_tso(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_TSO;
	else
		dev->features &= ~NETIF_F_TSO;

	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_tso);
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u32 ethtool_op_get_ufo(struct net_device *dev)
{
	return (dev->features & NETIF_F_UFO) != 0;
}
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EXPORT_SYMBOL(ethtool_op_get_ufo);
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int ethtool_op_set_ufo(struct net_device *dev, u32 data)
{
	if (data)
		dev->features |= NETIF_F_UFO;
	else
		dev->features &= ~NETIF_F_UFO;
	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_ufo);
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/* the following list of flags are the same as their associated
 * NETIF_F_xxx values in include/linux/netdevice.h
 */
static const u32 flags_dup_features =
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	(ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
	 ETH_FLAG_RXHASH);
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u32 ethtool_op_get_flags(struct net_device *dev)
{
	/* in the future, this function will probably contain additional
	 * handling for flags which are not so easily handled
	 * by a simple masking operation
	 */

	return dev->features & flags_dup_features;
}
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EXPORT_SYMBOL(ethtool_op_get_flags);
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int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
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{
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	if (data & ~supported)
		return -EINVAL;
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	dev->features = ((dev->features & ~flags_dup_features) |
			 (data & flags_dup_features));
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	return 0;
}
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EXPORT_SYMBOL(ethtool_op_set_flags);
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void ethtool_ntuple_flush(struct net_device *dev)
{
	struct ethtool_rx_ntuple_flow_spec_container *fsc, *f;

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

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/* Handlers for each ethtool command */

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#define ETHTOOL_DEV_FEATURE_WORDS	1

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static void ethtool_get_features_compat(struct net_device *dev,
	struct ethtool_get_features_block *features)
{
	if (!dev->ethtool_ops)
		return;

	/* getting RX checksum */
	if (dev->ethtool_ops->get_rx_csum)
		if (dev->ethtool_ops->get_rx_csum(dev))
			features[0].active |= NETIF_F_RXCSUM;
}

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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,
	};
	struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS] = {
		{
			.available = dev->hw_features,
			.requested = dev->wanted_features,
			.active = dev->features,
			.never_changed = NETIF_F_NEVER_CHANGE,
		},
	};
	u32 __user *sizeaddr;
	u32 copy_size;

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	ethtool_get_features_compat(dev, features);

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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];
	int ret = 0;

	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;

	if (features[0].valid & ~NETIF_F_ETHTOOL_BITS)
		return -EINVAL;

	if (features[0].valid & ~dev->hw_features) {
		features[0].valid &= dev->hw_features;
		ret |= ETHTOOL_F_UNSUPPORTED;
	}

	dev->wanted_features &= ~features[0].valid;
	dev->wanted_features |= features[0].valid & features[0].requested;
	netdev_update_features(dev);

	if ((dev->wanted_features ^ dev->features) & features[0].valid)
		ret |= ETHTOOL_F_WISH;

	return ret;
}

static const char netdev_features_strings[ETHTOOL_DEV_FEATURE_WORDS * 32][ETH_GSTRING_LEN] = {
	/* NETIF_F_SG */              "tx-scatter-gather",
	/* NETIF_F_IP_CSUM */         "tx-checksum-ipv4",
	/* NETIF_F_NO_CSUM */         "tx-checksum-unneeded",
	/* NETIF_F_HW_CSUM */         "tx-checksum-ip-generic",
	/* NETIF_F_IPV6_CSUM */       "tx_checksum-ipv6",
	/* NETIF_F_HIGHDMA */         "highdma",
	/* NETIF_F_FRAGLIST */        "tx-scatter-gather-fraglist",
	/* NETIF_F_HW_VLAN_TX */      "tx-vlan-hw-insert",

	/* NETIF_F_HW_VLAN_RX */      "rx-vlan-hw-parse",
	/* NETIF_F_HW_VLAN_FILTER */  "rx-vlan-filter",
	/* NETIF_F_VLAN_CHALLENGED */ "vlan-challenged",
	/* NETIF_F_GSO */             "tx-generic-segmentation",
	/* NETIF_F_LLTX */            "tx-lockless",
	/* NETIF_F_NETNS_LOCAL */     "netns-local",
	/* NETIF_F_GRO */             "rx-gro",
	/* NETIF_F_LRO */             "rx-lro",

	/* NETIF_F_TSO */             "tx-tcp-segmentation",
	/* NETIF_F_UFO */             "tx-udp-fragmentation",
	/* NETIF_F_GSO_ROBUST */      "tx-gso-robust",
	/* NETIF_F_TSO_ECN */         "tx-tcp-ecn-segmentation",
	/* NETIF_F_TSO6 */            "tx-tcp6-segmentation",
	/* NETIF_F_FSO */             "tx-fcoe-segmentation",
	"",
	"",

	/* NETIF_F_FCOE_CRC */        "tx-checksum-fcoe-crc",
	/* NETIF_F_SCTP_CSUM */       "tx-checksum-sctp",
	/* NETIF_F_FCOE_MTU */        "fcoe-mtu",
	/* NETIF_F_NTUPLE */          "rx-ntuple-filter",
	/* NETIF_F_RXHASH */          "rx-hashing",
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	/* NETIF_F_RXCSUM */          "rx-checksum",
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	"",
	"",
};

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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 && ops->get_sset_count && ops->get_strings)
		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 u32 ethtool_get_feature_mask(u32 eth_cmd)
{
	/* 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 void *__ethtool_get_one_feature_actor(struct net_device *dev, u32 ethcmd)
{
	const struct ethtool_ops *ops = dev->ethtool_ops;

	if (!ops)
		return NULL;

	switch (ethcmd) {
	case ETHTOOL_GTXCSUM:
		return ops->get_tx_csum;
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	case ETHTOOL_GRXCSUM:
		return ops->get_rx_csum;
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	case ETHTOOL_SSG:
		return ops->get_sg;
	case ETHTOOL_STSO:
		return ops->get_tso;
	case ETHTOOL_SUFO:
		return ops->get_ufo;
	default:
		return NULL;
	}
}

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static u32 __ethtool_get_rx_csum_oldbug(struct net_device *dev)
{
	return !!(dev->features & NETIF_F_ALL_CSUM);
}

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static int ethtool_get_one_feature(struct net_device *dev,
	char __user *useraddr, u32 ethcmd)
{
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	u32 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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	};

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	/* compatibility with discrete get_ ops */
	if (!(dev->hw_features & mask)) {
		u32 (*actor)(struct net_device *);

		actor = __ethtool_get_one_feature_actor(dev, ethcmd);

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		/* bug compatibility with old get_rx_csum */
		if (ethcmd == ETHTOOL_GRXCSUM && !actor)
			actor = __ethtool_get_rx_csum_oldbug;

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		if (actor)
			edata.data = actor(dev);
	}
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	if (copy_to_user(useraddr, &edata, sizeof(edata)))
		return -EFAULT;
	return 0;
}

static int __ethtool_set_tx_csum(struct net_device *dev, u32 data);
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static int __ethtool_set_rx_csum(struct net_device *dev, u32 data);
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static int __ethtool_set_sg(struct net_device *dev, u32 data);
static int __ethtool_set_tso(struct net_device *dev, u32 data);
static int __ethtool_set_ufo(struct net_device *dev, u32 data);

static int ethtool_set_one_feature(struct net_device *dev,
	void __user *useraddr, u32 ethcmd)
{
	struct ethtool_value edata;
	u32 mask;

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

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	mask = ethtool_get_feature_mask(ethcmd);
	mask &= dev->hw_features;
	if (mask) {
		if (edata.data)
			dev->wanted_features |= mask;
		else
			dev->wanted_features &= ~mask;

		netdev_update_features(dev);
		return 0;
	}

	/* Driver is not converted to ndo_fix_features or does not
	 * support changing this offload. In the latter case it won't
	 * have corresponding ethtool_ops field set.
	 *
	 * Following part is to be removed after all drivers advertise
	 * their changeable features in netdev->hw_features and stop
	 * using discrete offload setting ops.
	 */

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	switch (ethcmd) {
	case ETHTOOL_STXCSUM:
		return __ethtool_set_tx_csum(dev, edata.data);
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	case ETHTOOL_SRXCSUM:
		return __ethtool_set_rx_csum(dev, edata.data);
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	case ETHTOOL_SSG:
		return __ethtool_set_sg(dev, edata.data);
	case ETHTOOL_STSO:
		return __ethtool_set_tso(dev, edata.data);
	case ETHTOOL_SUFO:
		return __ethtool_set_ufo(dev, edata.data);
	default:
		return -EOPNOTSUPP;
	}
}

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static int __ethtool_set_flags(struct net_device *dev, u32 data)
{
	u32 changed;

	if (data & ~flags_dup_features)
		return -EINVAL;

	/* legacy set_flags() op */
	if (dev->ethtool_ops->set_flags) {
		if (unlikely(dev->hw_features & flags_dup_features))
			netdev_warn(dev,
				"driver BUG: mixed hw_features and set_flags()\n");
		return dev->ethtool_ops->set_flags(dev, data);
	}

	/* allow changing only bits set in hw_features */
	changed = (data ^ dev->wanted_features) & flags_dup_features;
	if (changed & ~dev->hw_features)
		return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;

	dev->wanted_features =
		(dev->wanted_features & ~changed) | data;

	netdev_update_features(dev);

	return 0;
}

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

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

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

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

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

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

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

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

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

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

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

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static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
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						    void __user *useraddr)
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{
	struct ethtool_sset_info info;
	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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	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))
633 634
		return -EFAULT;

635
	return dev->ethtool_ops->set_rxnfc(dev, &info);
636 637
}

638
static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
639
						u32 cmd, void __user *useraddr)
640 641
{
	struct ethtool_rxnfc info;
642
	size_t info_size = sizeof(info);
643 644 645
	const struct ethtool_ops *ops = dev->ethtool_ops;
	int ret;
	void *rule_buf = NULL;
646

647
	if (!ops->get_rxnfc)
648 649
		return -EOPNOTSUPP;

650 651 652 653 654 655 656 657 658
	/* 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))
659 660
		return -EFAULT;

661 662
	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
		if (info.rule_cnt > 0) {
663
			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
664
				rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
665
						   GFP_USER);
666 667 668 669
			if (!rule_buf)
				return -ENOMEM;
		}
	}
670

671 672 673 674 675
	ret = ops->get_rxnfc(dev, &info, rule_buf);
	if (ret < 0)
		goto err_out;

	ret = -EFAULT;
676
	if (copy_to_user(useraddr, &info, info_size))
677 678 679 680 681 682 683 684 685 686 687
		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:
688
	kfree(rule_buf);
689 690

	return ret;
691 692
}

693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
						     void __user *useraddr)
{
	struct ethtool_rxfh_indir *indir;
	u32 table_size;
	size_t full_size;
	int ret;

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

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

	if (table_size >
	    (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
		return -ENOMEM;
	full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
713
	indir = kzalloc(full_size, GFP_USER);
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
	if (!indir)
		return -ENOMEM;

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

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

out:
	kfree(indir);
	return ret;
}

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

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

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

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

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

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

out:
	kfree(indir);
	return ret;
}

767
static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
768 769
			struct ethtool_rx_ntuple_flow_spec *spec,
			struct ethtool_rx_ntuple_flow_spec_container *fsc)
770 771 772
{

	/* don't add filters forever */
773 774 775 776 777
	if (list->count >= ETHTOOL_MAX_NTUPLE_LIST_ENTRY) {
		/* free the container */
		kfree(fsc);
		return;
	}
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794

	/* Copy the whole filter over */
	fsc->fs.flow_type = spec->flow_type;
	memcpy(&fsc->fs.h_u, &spec->h_u, sizeof(spec->h_u));
	memcpy(&fsc->fs.m_u, &spec->m_u, sizeof(spec->m_u));

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

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

795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826
/*
 * ethtool does not (or did not) set masks for flow parameters that are
 * not specified, so if both value and mask are 0 then this must be
 * treated as equivalent to a mask with all bits set.  Implement that
 * here rather than in drivers.
 */
static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
{
	struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
	struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;

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

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

827 828
static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
						    void __user *useraddr)
829 830 831
{
	struct ethtool_rx_ntuple cmd;
	const struct ethtool_ops *ops = dev->ethtool_ops;
832
	struct ethtool_rx_ntuple_flow_spec_container *fsc = NULL;
833 834 835 836 837 838 839 840
	int ret;

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

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

841 842
	rx_ntuple_fix_masks(&cmd.fs);

843 844 845
	/*
	 * Cache filter in dev struct for GET operation only if
	 * the underlying driver doesn't have its own GET operation, and
846 847
	 * only if the filter was added successfully.  First make sure we
	 * can allocate the filter, then continue if successful.
848
	 */
849 850 851
	if (!ops->get_rx_ntuple) {
		fsc = kmalloc(sizeof(*fsc), GFP_ATOMIC);
		if (!fsc)
852
			return -ENOMEM;
853 854 855 856 857 858 859 860 861 862
	}

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

	if (!ops->get_rx_ntuple)
		__rx_ntuple_filter_add(&dev->ethtool_ntuple_list, &cmd.fs, fsc);
863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887

	return ret;
}

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

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

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

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

	gstrings.len = ret;

888
	data = kzalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946
	if (!data)
		return -ENOMEM;

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

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

		switch (fsc->fs.flow_type) {
		case TCP_V4_FLOW:
			sprintf(p, "\tFlow Type: TCP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case UDP_V4_FLOW:
			sprintf(p, "\tFlow Type: UDP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case SCTP_V4_FLOW:
			sprintf(p, "\tFlow Type: SCTP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case AH_ESP_V4_FLOW:
			sprintf(p, "\tFlow Type: AH ESP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case ESP_V4_FLOW:
			sprintf(p, "\tFlow Type: ESP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IP_USER_FLOW:
			sprintf(p, "\tFlow Type: Raw IP\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IPV4_FLOW:
			sprintf(p, "\tFlow Type: IPv4\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		default:
			sprintf(p, "\tFlow Type: Unknown\n");
			p += ETH_GSTRING_LEN;
			num_strings++;
			goto unknown_filter;
947
		}
948 949 950 951 952 953 954

		/* now the rest of the filters */
		switch (fsc->fs.flow_type) {
		case TCP_V4_FLOW:
		case UDP_V4_FLOW:
		case SCTP_V4_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
955
				fsc->fs.h_u.tcp_ip4_spec.ip4src);
956 957 958
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
959
				fsc->fs.m_u.tcp_ip4_spec.ip4src);
960 961 962
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
963
				fsc->fs.h_u.tcp_ip4_spec.ip4dst);
964 965 966
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
967
				fsc->fs.m_u.tcp_ip4_spec.ip4dst);
968 969 970
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc Port: %d, mask: 0x%x\n",
971 972
				fsc->fs.h_u.tcp_ip4_spec.psrc,
				fsc->fs.m_u.tcp_ip4_spec.psrc);
973 974 975
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest Port: %d, mask: 0x%x\n",
976 977
				fsc->fs.h_u.tcp_ip4_spec.pdst,
				fsc->fs.m_u.tcp_ip4_spec.pdst);
978 979 980
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tTOS: %d, mask: 0x%x\n",
981 982
				fsc->fs.h_u.tcp_ip4_spec.tos,
				fsc->fs.m_u.tcp_ip4_spec.tos);
983 984 985 986 987 988
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case AH_ESP_V4_FLOW:
		case ESP_V4_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
989
				fsc->fs.h_u.ah_ip4_spec.ip4src);
990 991 992
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
993
				fsc->fs.m_u.ah_ip4_spec.ip4src);
994 995 996
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
997
				fsc->fs.h_u.ah_ip4_spec.ip4dst);
998 999 1000
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
1001
				fsc->fs.m_u.ah_ip4_spec.ip4dst);
1002 1003 1004
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSPI: %d, mask: 0x%x\n",
1005 1006
				fsc->fs.h_u.ah_ip4_spec.spi,
				fsc->fs.m_u.ah_ip4_spec.spi);
1007 1008 1009
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1010 1011
				fsc->fs.h_u.ah_ip4_spec.tos,
				fsc->fs.m_u.ah_ip4_spec.tos);
1012 1013 1014 1015 1016
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IP_USER_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
1017
				fsc->fs.h_u.usr_ip4_spec.ip4src);
1018 1019 1020
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
1021
				fsc->fs.m_u.usr_ip4_spec.ip4src);
1022 1023 1024
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
1025
				fsc->fs.h_u.usr_ip4_spec.ip4dst);
1026 1027 1028
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
1029
				fsc->fs.m_u.usr_ip4_spec.ip4dst);
1030 1031 1032 1033 1034
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
		case IPV4_FLOW:
			sprintf(p, "\tSrc IP addr: 0x%x\n",
1035
				fsc->fs.h_u.usr_ip4_spec.ip4src);
1036 1037 1038
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tSrc IP mask: 0x%x\n",
1039
				fsc->fs.m_u.usr_ip4_spec.ip4src);
1040 1041 1042
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP addr: 0x%x\n",
1043
				fsc->fs.h_u.usr_ip4_spec.ip4dst);
1044 1045 1046
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tDest IP mask: 0x%x\n",
1047
				fsc->fs.m_u.usr_ip4_spec.ip4dst);
1048 1049 1050
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tL4 bytes: 0x%x, mask: 0x%x\n",
1051 1052
				fsc->fs.h_u.usr_ip4_spec.l4_4_bytes,
				fsc->fs.m_u.usr_ip4_spec.l4_4_bytes);
1053 1054 1055
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1056 1057
				fsc->fs.h_u.usr_ip4_spec.tos,
				fsc->fs.m_u.usr_ip4_spec.tos);
1058 1059 1060
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tIP Version: %d, mask: 0x%x\n",
1061 1062
				fsc->fs.h_u.usr_ip4_spec.ip_ver,
				fsc->fs.m_u.usr_ip4_spec.ip_ver);
1063 1064 1065
			p += ETH_GSTRING_LEN;
			num_strings++;
			sprintf(p, "\tProtocol: %d, mask: 0x%x\n",
1066 1067
				fsc->fs.h_u.usr_ip4_spec.proto,
				fsc->fs.m_u.usr_ip4_spec.proto);
1068 1069 1070
			p += ETH_GSTRING_LEN;
			num_strings++;
			break;
1071
		}
1072
		sprintf(p, "\tVLAN: %d, mask: 0x%x\n",
1073
			fsc->fs.vlan_tag, fsc->fs.vlan_tag_mask);
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
		p += ETH_GSTRING_LEN;
		num_strings++;
		sprintf(p, "\tUser-defined: 0x%Lx\n", fsc->fs.data);
		p += ETH_GSTRING_LEN;
		num_strings++;
		sprintf(p, "\tUser-defined mask: 0x%Lx\n", fsc->fs.data_mask);
		p += ETH_GSTRING_LEN;
		num_strings++;
		if (fsc->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP)
			sprintf(p, "\tAction: Drop\n");
		else
			sprintf(p, "\tAction: Direct to queue %d\n",
1086
				fsc->fs.action);
1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
		p += ETH_GSTRING_LEN;
		num_strings++;
unknown_filter:
		i++;
	}
copy:
	/* indicate to userspace how many strings we actually have */
	gstrings.len = num_strings;
	ret = -EFAULT;
	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
		goto out;
	useraddr += sizeof(gstrings);
	if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
		goto out;
	ret = 0;

out:
	kfree(data);
	return ret;
}

L
Linus Torvalds 已提交
1108 1109 1110
static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_regs regs;
1111
	const struct ethtool_ops *ops = dev->ethtool_ops;
L
Linus Torvalds 已提交
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
	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;

1125
	regbuf = vzalloc(reglen);
L
Linus Torvalds 已提交
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
	if (!regbuf)
		return -ENOMEM;

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

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

 out:
1140
	vfree(regbuf);
L
Linus Torvalds 已提交
1141 1142 1143
	return ret;
}

B
Ben Hutchings 已提交
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
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
1164 1165
static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
1166
	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
L
Linus Torvalds 已提交
1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198

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

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

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

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

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

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

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

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

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

1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212
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;
}

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static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
1216
	const struct ethtool_ops *ops = dev->ethtool_ops;
1217 1218
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
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	u8 *data;
1220
	int ret = 0;
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	if (!ops->get_eeprom || !ops->get_eeprom_len)
		return -EOPNOTSUPP;

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

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

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

1236
	data = kmalloc(PAGE_SIZE, GFP_USER);
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	if (!data)
		return -ENOMEM;

1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254
	bytes_remaining = eeprom.len;
	while (bytes_remaining > 0) {
		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

		ret = ops->get_eeprom(dev, &eeprom, data);
		if (ret)
			break;
		if (copy_to_user(userbuf, data, eeprom.len)) {
			ret = -EFAULT;
			break;
		}
		userbuf += eeprom.len;
		eeprom.offset += eeprom.len;
		bytes_remaining -= eeprom.len;
	}
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1256 1257 1258 1259 1260
	eeprom.len = userbuf - (useraddr + sizeof(eeprom));
	eeprom.offset -= eeprom.len;
	if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
		ret = -EFAULT;

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	kfree(data);
	return ret;
}

static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_eeprom eeprom;
1268
	const struct ethtool_ops *ops = dev->ethtool_ops;
1269 1270
	void __user *userbuf = useraddr + sizeof(eeprom);
	u32 bytes_remaining;
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	u8 *data;
1272
	int ret = 0;
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	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;

1288
	data = kmalloc(PAGE_SIZE, GFP_USER);
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	if (!data)
		return -ENOMEM;

1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
	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;
	}
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	kfree(data);
	return ret;
}

1312 1313
static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
						   void __user *useraddr)
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{
1315
	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
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	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;
}

1327 1328
static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
						   void __user *useraddr)
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{
	struct ethtool_coalesce coalesce;

1332
	if (!dev->ethtool_ops->set_coalesce)
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		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)
{
1343
	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
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	if (!dev->ethtool_ops->get_ringparam)
		return -EOPNOTSUPP;

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

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

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

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

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

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

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

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

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

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

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

1386
	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_set_sg(struct net_device *dev, u32 data)
{
	int err;

1399 1400 1401
	if (data && !(dev->features & NETIF_F_ALL_CSUM))
		return -EINVAL;

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

1408 1409 1410 1411 1412
	if (!data && dev->ethtool_ops->set_ufo) {
		err = dev->ethtool_ops->set_ufo(dev, 0);
		if (err)
			return err;
	}
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	return dev->ethtool_ops->set_sg(dev, data);
}

1416
static int __ethtool_set_tx_csum(struct net_device *dev, u32 data)
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{
	int err;

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

1423
	if (!data && dev->ethtool_ops->set_sg) {
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		err = __ethtool_set_sg(dev, 0);
		if (err)
			return err;
	}

1429
	return dev->ethtool_ops->set_tx_csum(dev, data);
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}

1432
static int __ethtool_set_rx_csum(struct net_device *dev, u32 data)
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{
	if (!dev->ethtool_ops->set_rx_csum)
		return -EOPNOTSUPP;

1437
	if (!data)
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		dev->features &= ~NETIF_F_GRO;

1440
	return dev->ethtool_ops->set_rx_csum(dev, data);
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}

1443
static int __ethtool_set_tso(struct net_device *dev, u32 data)
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{
	if (!dev->ethtool_ops->set_tso)
		return -EOPNOTSUPP;

1448
	if (data && !(dev->features & NETIF_F_SG))
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		return -EINVAL;

1451
	return dev->ethtool_ops->set_tso(dev, data);
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}

1454
static int __ethtool_set_ufo(struct net_device *dev, u32 data)
1455 1456 1457
{
	if (!dev->ethtool_ops->set_ufo)
		return -EOPNOTSUPP;
1458
	if (data && !(dev->features & NETIF_F_SG))
1459
		return -EINVAL;
1460
	if (data && !((dev->features & NETIF_F_GEN_CSUM) ||
1461 1462
		(dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
			== (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
1463
		return -EINVAL;
1464
	return dev->ethtool_ops->set_ufo(dev, data);
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}

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static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
{
	struct ethtool_test test;
1470
	const struct ethtool_ops *ops = dev->ethtool_ops;
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	u64 *data;
1472
	int ret, test_len;
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1474
	if (!ops->self_test || !ops->get_sset_count)
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		return -EOPNOTSUPP;

1477
	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1478 1479 1480 1481
	if (test_len < 0)
		return test_len;
	WARN_ON(test_len == 0);

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

1485 1486
	test.len = test_len;
	data = kmalloc(test_len * sizeof(u64), GFP_USER);
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	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;

1514
	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1515 1516 1517 1518
	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;

1524
	__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;

1534
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;

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

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

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

static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
	struct ethtool_stats stats;
1555
	const struct ethtool_ops *ops = dev->ethtool_ops;
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	u64 *data;
1557
	int ret, n_stats;
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1559
	if (!ops->get_ethtool_stats || !ops->get_sset_count)
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		return -EOPNOTSUPP;

1562
	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1563 1564 1565 1566
	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;

1570 1571
	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;
}

1590
static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1591 1592 1593
{
	struct ethtool_perm_addr epaddr;

1594
	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1595 1596
		return -EFAULT;

1597 1598 1599
	if (epaddr.size < dev->addr_len)
		return -ETOOSMALL;
	epaddr.size = dev->addr_len;
1600 1601

	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1602
		return -EFAULT;
1603
	useraddr += sizeof(epaddr);
1604 1605 1606
	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
		return -EFAULT;
	return 0;
1607 1608
}

1609 1610
static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
			     u32 cmd, u32 (*actor)(struct net_device *))
1611
{
1612
	struct ethtool_value edata = { .cmd = cmd };
1613

1614
	if (!actor)
1615 1616
		return -EOPNOTSUPP;

1617
	edata.data = actor(dev);
1618 1619 1620 1621 1622 1623

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

1624 1625
static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
			     void (*actor)(struct net_device *, u32))
1626 1627 1628
{
	struct ethtool_value edata;

1629
	if (!actor)
1630 1631 1632 1633 1634
		return -EOPNOTSUPP;

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

1635
	actor(dev, edata.data);
1636 1637 1638
	return 0;
}

1639 1640
static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
			     int (*actor)(struct net_device *, u32))
1641 1642 1643
{
	struct ethtool_value edata;

1644
	if (!actor)
1645 1646 1647 1648 1649
		return -EOPNOTSUPP;

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

1650
	return actor(dev, edata.data);
1651 1652
}

1653 1654
static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
						   char __user *useraddr)
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666
{
	struct ethtool_flash efl;

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

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

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

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

1669
int dev_ethtool(struct net *net, struct ifreq *ifr)
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{
1671
	struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
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	void __user *useraddr = ifr->ifr_data;
	u32 ethcmd;
	int rc;
1675
	u32 old_features;
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	if (!dev || !netif_device_present(dev))
		return -ENODEV;

1680
	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
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		return -EFAULT;

1683 1684 1685 1686 1687 1688 1689 1690 1691 1692
	if (!dev->ethtool_ops) {
		/* ETHTOOL_GDRVINFO does not require any driver support.
		 * It is also unprivileged and does not change anything,
		 * so we can take a shortcut to it. */
		if (ethcmd == ETHTOOL_GDRVINFO)
			return ethtool_get_drvinfo(dev, useraddr);
		else
			return -EOPNOTSUPP;
	}

1693
	/* Allow some commands to be done by anyone */
1694
	switch (ethcmd) {
1695
	case ETHTOOL_GSET:
1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
	case ETHTOOL_GDRVINFO:
	case ETHTOOL_GMSGLVL:
	case ETHTOOL_GCOALESCE:
	case ETHTOOL_GRINGPARAM:
	case ETHTOOL_GPAUSEPARAM:
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
	case ETHTOOL_GSG:
	case ETHTOOL_GSTRINGS:
	case ETHTOOL_GTSO:
	case ETHTOOL_GPERMADDR:
	case ETHTOOL_GUFO:
	case ETHTOOL_GGSO:
1709
	case ETHTOOL_GGRO:
1710 1711
	case ETHTOOL_GFLAGS:
	case ETHTOOL_GPFLAGS:
1712
	case ETHTOOL_GRXFH:
1713 1714 1715 1716
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
1717
	case ETHTOOL_GFEATURES:
1718 1719 1720 1721 1722 1723
		break;
	default:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
	}

1724 1725 1726
	if (dev->ethtool_ops->begin) {
		rc = dev->ethtool_ops->begin(dev);
		if (rc  < 0)
L
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			return rc;
1728
	}
1729 1730
	old_features = dev->features;

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	switch (ethcmd) {
	case ETHTOOL_GSET:
		rc = ethtool_get_settings(dev, useraddr);
		break;
	case ETHTOOL_SSET:
		rc = ethtool_set_settings(dev, useraddr);
		break;
	case ETHTOOL_GDRVINFO:
		rc = ethtool_get_drvinfo(dev, useraddr);
		break;
	case ETHTOOL_GREGS:
		rc = ethtool_get_regs(dev, useraddr);
		break;
	case ETHTOOL_GWOL:
		rc = ethtool_get_wol(dev, useraddr);
		break;
	case ETHTOOL_SWOL:
		rc = ethtool_set_wol(dev, useraddr);
		break;
	case ETHTOOL_GMSGLVL:
1751 1752
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_msglevel);
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		break;
	case ETHTOOL_SMSGLVL:
1755 1756
		rc = ethtool_set_value_void(dev, useraddr,
				       dev->ethtool_ops->set_msglevel);
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		break;
	case ETHTOOL_NWAY_RST:
		rc = ethtool_nway_reset(dev);
		break;
	case ETHTOOL_GLINK:
1762
		rc = ethtool_get_link(dev, useraddr);
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1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799
		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;
1800 1801 1802
	case ETHTOOL_GPERMADDR:
		rc = ethtool_get_perm_addr(dev, useraddr);
		break;
1803
	case ETHTOOL_GFLAGS:
1804
		rc = ethtool_get_value(dev, useraddr, ethcmd,
1805 1806 1807
				       (dev->ethtool_ops->get_flags ?
					dev->ethtool_ops->get_flags :
					ethtool_op_get_flags));
1808 1809
		break;
	case ETHTOOL_SFLAGS:
1810
		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1811
		break;
1812
	case ETHTOOL_GPFLAGS:
1813 1814
		rc = ethtool_get_value(dev, useraddr, ethcmd,
				       dev->ethtool_ops->get_priv_flags);
1815 1816
		break;
	case ETHTOOL_SPFLAGS:
1817 1818
		rc = ethtool_set_value(dev, useraddr,
				       dev->ethtool_ops->set_priv_flags);
1819
		break;
1820
	case ETHTOOL_GRXFH:
1821 1822 1823 1824
	case ETHTOOL_GRXRINGS:
	case ETHTOOL_GRXCLSRLCNT:
	case ETHTOOL_GRXCLSRULE:
	case ETHTOOL_GRXCLSRLALL:
1825
		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1826 1827
		break;
	case ETHTOOL_SRXFH:
1828 1829
	case ETHTOOL_SRXCLSRLDEL:
	case ETHTOOL_SRXCLSRLINS:
1830
		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1831
		break;
1832 1833 1834
	case ETHTOOL_FLASHDEV:
		rc = ethtool_flash_device(dev, useraddr);
		break;
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	case ETHTOOL_RESET:
		rc = ethtool_reset(dev, useraddr);
		break;
1838 1839 1840 1841 1842 1843
	case ETHTOOL_SRXNTUPLE:
		rc = ethtool_set_rx_ntuple(dev, useraddr);
		break;
	case ETHTOOL_GRXNTUPLE:
		rc = ethtool_get_rx_ntuple(dev, useraddr);
		break;
1844 1845 1846
	case ETHTOOL_GSSET_INFO:
		rc = ethtool_get_sset_info(dev, useraddr);
		break;
1847 1848 1849 1850 1851 1852
	case ETHTOOL_GRXFHINDIR:
		rc = ethtool_get_rxfh_indir(dev, useraddr);
		break;
	case ETHTOOL_SRXFHINDIR:
		rc = ethtool_set_rxfh_indir(dev, useraddr);
		break;
1853 1854 1855 1856 1857 1858
	case ETHTOOL_GFEATURES:
		rc = ethtool_get_features(dev, useraddr);
		break;
	case ETHTOOL_SFEATURES:
		rc = ethtool_set_features(dev, useraddr);
		break;
1859
	case ETHTOOL_GTXCSUM:
1860
	case ETHTOOL_GRXCSUM:
1861 1862 1863 1864 1865 1866 1867 1868
	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:
1869
	case ETHTOOL_SRXCSUM:
1870 1871 1872 1873 1874 1875 1876
	case ETHTOOL_SSG:
	case ETHTOOL_STSO:
	case ETHTOOL_SUFO:
	case ETHTOOL_SGSO:
	case ETHTOOL_SGRO:
		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
		break;
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	default:
1878
		rc = -EOPNOTSUPP;
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	}
1880

1881
	if (dev->ethtool_ops->complete)
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		dev->ethtool_ops->complete(dev);
1883 1884 1885 1886

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

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	return rc;
}