1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * net/core/ethtool.c - Ethtool ioctl handler
   4 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   5 *
   6 * This file is where we call all the ethtool_ops commands to get
   7 * the information ethtool needs.
   8 */
   9
  10#include <linux/compat.h>
  11#include <linux/etherdevice.h>
  12#include <linux/module.h>
  13#include <linux/types.h>
  14#include <linux/capability.h>
  15#include <linux/errno.h>
  16#include <linux/ethtool.h>
  17#include <linux/netdevice.h>
  18#include <linux/net_tstamp.h>
  19#include <linux/phy.h>
  20#include <linux/bitops.h>
  21#include <linux/uaccess.h>
  22#include <linux/vmalloc.h>
  23#include <linux/sfp.h>
  24#include <linux/slab.h>
  25#include <linux/rtnetlink.h>
  26#include <linux/sched/signal.h>
  27#include <linux/net.h>
  28#include <linux/pm_runtime.h>
  29#include <net/devlink.h>
  30#include <net/ipv6.h>
  31#include <net/xdp_sock_drv.h>
  32#include <net/flow_offload.h>
  33#include <linux/ethtool_netlink.h>
  34#include <generated/utsrelease.h>
  35#include "common.h"
  36
  37/* State held across locks and calls for commands which have devlink fallback */
  38struct ethtool_devlink_compat {
  39	struct devlink *devlink;
  40	union {
  41		struct ethtool_flash efl;
  42		struct ethtool_drvinfo info;
  43	};
  44};
  45
  46static struct devlink *netdev_to_devlink_get(struct net_device *dev)
  47{
  48	if (!dev->devlink_port)
  49		return NULL;
  50	return devlink_try_get(dev->devlink_port->devlink);
  51}
  52
  53/*
  54 * Some useful ethtool_ops methods that're device independent.
  55 * If we find that all drivers want to do the same thing here,
  56 * we can turn these into dev_() function calls.
  57 */
  58
  59u32 ethtool_op_get_link(struct net_device *dev)
  60{
  61	/* Synchronize carrier state with link watch, see also rtnl_getlink() */
  62	linkwatch_sync_dev(dev);
  63
  64	return netif_carrier_ok(dev) ? 1 : 0;
  65}
  66EXPORT_SYMBOL(ethtool_op_get_link);
  67
  68int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  69{
  70	info->so_timestamping =
  71		SOF_TIMESTAMPING_TX_SOFTWARE |
  72		SOF_TIMESTAMPING_RX_SOFTWARE |
  73		SOF_TIMESTAMPING_SOFTWARE;
  74	info->phc_index = -1;
  75	return 0;
  76}
  77EXPORT_SYMBOL(ethtool_op_get_ts_info);
  78
  79/* Handlers for each ethtool command */
  80
  81static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  82{
  83	struct ethtool_gfeatures cmd = {
  84		.cmd = ETHTOOL_GFEATURES,
  85		.size = ETHTOOL_DEV_FEATURE_WORDS,
  86	};
  87	struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  88	u32 __user *sizeaddr;
  89	u32 copy_size;
  90	int i;
  91
  92	/* in case feature bits run out again */
  93	BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  94
  95	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  96		features[i].available = (u32)(dev->hw_features >> (32 * i));
  97		features[i].requested = (u32)(dev->wanted_features >> (32 * i));
  98		features[i].active = (u32)(dev->features >> (32 * i));
  99		features[i].never_changed =
 100			(u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 101	}
 102
 103	sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 104	if (get_user(copy_size, sizeaddr))
 105		return -EFAULT;
 106
 107	if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 108		copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 109
 110	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 111		return -EFAULT;
 112	useraddr += sizeof(cmd);
 113	if (copy_to_user(useraddr, features,
 114			 array_size(copy_size, sizeof(*features))))
 115		return -EFAULT;
 116
 117	return 0;
 118}
 119
 120static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 121{
 122	struct ethtool_sfeatures cmd;
 123	struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 124	netdev_features_t wanted = 0, valid = 0;
 125	int i, ret = 0;
 126
 127	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 128		return -EFAULT;
 129	useraddr += sizeof(cmd);
 130
 131	if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 132		return -EINVAL;
 133
 134	if (copy_from_user(features, useraddr, sizeof(features)))
 135		return -EFAULT;
 136
 137	for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 138		valid |= (netdev_features_t)features[i].valid << (32 * i);
 139		wanted |= (netdev_features_t)features[i].requested << (32 * i);
 140	}
 141
 142	if (valid & ~NETIF_F_ETHTOOL_BITS)
 143		return -EINVAL;
 144
 145	if (valid & ~dev->hw_features) {
 146		valid &= dev->hw_features;
 147		ret |= ETHTOOL_F_UNSUPPORTED;
 148	}
 149
 150	dev->wanted_features &= ~valid;
 151	dev->wanted_features |= wanted & valid;
 152	__netdev_update_features(dev);
 153
 154	if ((dev->wanted_features ^ dev->features) & valid)
 155		ret |= ETHTOOL_F_WISH;
 156
 157	return ret;
 158}
 159
 160static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 161{
 162	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 163	const struct ethtool_ops *ops = dev->ethtool_ops;
 164
 165	if (sset == ETH_SS_FEATURES)
 166		return ARRAY_SIZE(netdev_features_strings);
 167
 168	if (sset == ETH_SS_RSS_HASH_FUNCS)
 169		return ARRAY_SIZE(rss_hash_func_strings);
 170
 171	if (sset == ETH_SS_TUNABLES)
 172		return ARRAY_SIZE(tunable_strings);
 173
 174	if (sset == ETH_SS_PHY_TUNABLES)
 175		return ARRAY_SIZE(phy_tunable_strings);
 176
 177	if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 178	    !ops->get_ethtool_phy_stats &&
 179	    phy_ops && phy_ops->get_sset_count)
 180		return phy_ops->get_sset_count(dev->phydev);
 181
 182	if (sset == ETH_SS_LINK_MODES)
 183		return __ETHTOOL_LINK_MODE_MASK_NBITS;
 184
 185	if (ops->get_sset_count && ops->get_strings)
 186		return ops->get_sset_count(dev, sset);
 187	else
 188		return -EOPNOTSUPP;
 189}
 190
 191static void __ethtool_get_strings(struct net_device *dev,
 192	u32 stringset, u8 *data)
 193{
 194	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 195	const struct ethtool_ops *ops = dev->ethtool_ops;
 196
 197	if (stringset == ETH_SS_FEATURES)
 198		memcpy(data, netdev_features_strings,
 199			sizeof(netdev_features_strings));
 200	else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 201		memcpy(data, rss_hash_func_strings,
 202		       sizeof(rss_hash_func_strings));
 203	else if (stringset == ETH_SS_TUNABLES)
 204		memcpy(data, tunable_strings, sizeof(tunable_strings));
 205	else if (stringset == ETH_SS_PHY_TUNABLES)
 206		memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 207	else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 208		 !ops->get_ethtool_phy_stats && phy_ops &&
 209		 phy_ops->get_strings)
 210		phy_ops->get_strings(dev->phydev, data);
 211	else if (stringset == ETH_SS_LINK_MODES)
 212		memcpy(data, link_mode_names,
 213		       __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 214	else
 215		/* ops->get_strings is valid because checked earlier */
 216		ops->get_strings(dev, stringset, data);
 217}
 218
 219static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 220{
 221	/* feature masks of legacy discrete ethtool ops */
 222
 223	switch (eth_cmd) {
 224	case ETHTOOL_GTXCSUM:
 225	case ETHTOOL_STXCSUM:
 226		return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
 227		       NETIF_F_SCTP_CRC;
 228	case ETHTOOL_GRXCSUM:
 229	case ETHTOOL_SRXCSUM:
 230		return NETIF_F_RXCSUM;
 231	case ETHTOOL_GSG:
 232	case ETHTOOL_SSG:
 233		return NETIF_F_SG | NETIF_F_FRAGLIST;
 234	case ETHTOOL_GTSO:
 235	case ETHTOOL_STSO:
 236		return NETIF_F_ALL_TSO;
 237	case ETHTOOL_GGSO:
 238	case ETHTOOL_SGSO:
 239		return NETIF_F_GSO;
 240	case ETHTOOL_GGRO:
 241	case ETHTOOL_SGRO:
 242		return NETIF_F_GRO;
 243	default:
 244		BUG();
 245	}
 246}
 247
 248static int ethtool_get_one_feature(struct net_device *dev,
 249	char __user *useraddr, u32 ethcmd)
 250{
 251	netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 252	struct ethtool_value edata = {
 253		.cmd = ethcmd,
 254		.data = !!(dev->features & mask),
 255	};
 256
 257	if (copy_to_user(useraddr, &edata, sizeof(edata)))
 258		return -EFAULT;
 259	return 0;
 260}
 261
 262static int ethtool_set_one_feature(struct net_device *dev,
 263	void __user *useraddr, u32 ethcmd)
 264{
 265	struct ethtool_value edata;
 266	netdev_features_t mask;
 267
 268	if (copy_from_user(&edata, useraddr, sizeof(edata)))
 269		return -EFAULT;
 270
 271	mask = ethtool_get_feature_mask(ethcmd);
 272	mask &= dev->hw_features;
 273	if (!mask)
 274		return -EOPNOTSUPP;
 275
 276	if (edata.data)
 277		dev->wanted_features |= mask;
 278	else
 279		dev->wanted_features &= ~mask;
 280
 281	__netdev_update_features(dev);
 282
 283	return 0;
 284}
 285
 286#define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 287			  ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 288#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 289			  NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 290			  NETIF_F_RXHASH)
 291
 292static u32 __ethtool_get_flags(struct net_device *dev)
 293{
 294	u32 flags = 0;
 295
 296	if (dev->features & NETIF_F_LRO)
 297		flags |= ETH_FLAG_LRO;
 298	if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 299		flags |= ETH_FLAG_RXVLAN;
 300	if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 301		flags |= ETH_FLAG_TXVLAN;
 302	if (dev->features & NETIF_F_NTUPLE)
 303		flags |= ETH_FLAG_NTUPLE;
 304	if (dev->features & NETIF_F_RXHASH)
 305		flags |= ETH_FLAG_RXHASH;
 306
 307	return flags;
 308}
 309
 310static int __ethtool_set_flags(struct net_device *dev, u32 data)
 311{
 312	netdev_features_t features = 0, changed;
 313
 314	if (data & ~ETH_ALL_FLAGS)
 315		return -EINVAL;
 316
 317	if (data & ETH_FLAG_LRO)
 318		features |= NETIF_F_LRO;
 319	if (data & ETH_FLAG_RXVLAN)
 320		features |= NETIF_F_HW_VLAN_CTAG_RX;
 321	if (data & ETH_FLAG_TXVLAN)
 322		features |= NETIF_F_HW_VLAN_CTAG_TX;
 323	if (data & ETH_FLAG_NTUPLE)
 324		features |= NETIF_F_NTUPLE;
 325	if (data & ETH_FLAG_RXHASH)
 326		features |= NETIF_F_RXHASH;
 327
 328	/* allow changing only bits set in hw_features */
 329	changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 330	if (changed & ~dev->hw_features)
 331		return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 332
 333	dev->wanted_features =
 334		(dev->wanted_features & ~changed) | (features & changed);
 335
 336	__netdev_update_features(dev);
 337
 338	return 0;
 339}
 340
 341/* Given two link masks, AND them together and save the result in dst. */
 342void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 343				  struct ethtool_link_ksettings *src)
 344{
 345	unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 346	unsigned int idx = 0;
 347
 348	for (; idx < size; idx++) {
 349		dst->link_modes.supported[idx] &=
 350			src->link_modes.supported[idx];
 351		dst->link_modes.advertising[idx] &=
 352			src->link_modes.advertising[idx];
 353	}
 354}
 355EXPORT_SYMBOL(ethtool_intersect_link_masks);
 356
 357void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 358					     u32 legacy_u32)
 359{
 360	linkmode_zero(dst);
 361	dst[0] = legacy_u32;
 362}
 363EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 364
 365/* return false if src had higher bits set. lower bits always updated. */
 366bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 367					     const unsigned long *src)
 368{
 369	*legacy_u32 = src[0];
 370	return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
 371		__ETHTOOL_LINK_MODE_MASK_NBITS;
 372}
 373EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 374
 375/* return false if ksettings link modes had higher bits
 376 * set. legacy_settings always updated (best effort)
 377 */
 378static bool
 379convert_link_ksettings_to_legacy_settings(
 380	struct ethtool_cmd *legacy_settings,
 381	const struct ethtool_link_ksettings *link_ksettings)
 382{
 383	bool retval = true;
 384
 385	memset(legacy_settings, 0, sizeof(*legacy_settings));
 386	/* this also clears the deprecated fields in legacy structure:
 387	 * __u8		transceiver;
 388	 * __u32	maxtxpkt;
 389	 * __u32	maxrxpkt;
 390	 */
 391
 392	retval &= ethtool_convert_link_mode_to_legacy_u32(
 393		&legacy_settings->supported,
 394		link_ksettings->link_modes.supported);
 395	retval &= ethtool_convert_link_mode_to_legacy_u32(
 396		&legacy_settings->advertising,
 397		link_ksettings->link_modes.advertising);
 398	retval &= ethtool_convert_link_mode_to_legacy_u32(
 399		&legacy_settings->lp_advertising,
 400		link_ksettings->link_modes.lp_advertising);
 401	ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 402	legacy_settings->duplex
 403		= link_ksettings->base.duplex;
 404	legacy_settings->port
 405		= link_ksettings->base.port;
 406	legacy_settings->phy_address
 407		= link_ksettings->base.phy_address;
 408	legacy_settings->autoneg
 409		= link_ksettings->base.autoneg;
 410	legacy_settings->mdio_support
 411		= link_ksettings->base.mdio_support;
 412	legacy_settings->eth_tp_mdix
 413		= link_ksettings->base.eth_tp_mdix;
 414	legacy_settings->eth_tp_mdix_ctrl
 415		= link_ksettings->base.eth_tp_mdix_ctrl;
 416	legacy_settings->transceiver
 417		= link_ksettings->base.transceiver;
 418	return retval;
 419}
 420
 421/* number of 32-bit words to store the user's link mode bitmaps */
 422#define __ETHTOOL_LINK_MODE_MASK_NU32			\
 423	DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 424
 425/* layout of the struct passed from/to userland */
 426struct ethtool_link_usettings {
 427	struct ethtool_link_settings base;
 428	struct {
 429		__u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 430		__u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 431		__u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 432	} link_modes;
 433};
 434
 435/* Internal kernel helper to query a device ethtool_link_settings. */
 436int __ethtool_get_link_ksettings(struct net_device *dev,
 437				 struct ethtool_link_ksettings *link_ksettings)
 438{
 439	ASSERT_RTNL();
 440
 441	if (!dev->ethtool_ops->get_link_ksettings)
 442		return -EOPNOTSUPP;
 443
 444	memset(link_ksettings, 0, sizeof(*link_ksettings));
 445	return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 446}
 447EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 448
 449/* convert ethtool_link_usettings in user space to a kernel internal
 450 * ethtool_link_ksettings. return 0 on success, errno on error.
 451 */
 452static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 453					 const void __user *from)
 454{
 455	struct ethtool_link_usettings link_usettings;
 456
 457	if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 458		return -EFAULT;
 459
 460	memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 461	bitmap_from_arr32(to->link_modes.supported,
 462			  link_usettings.link_modes.supported,
 463			  __ETHTOOL_LINK_MODE_MASK_NBITS);
 464	bitmap_from_arr32(to->link_modes.advertising,
 465			  link_usettings.link_modes.advertising,
 466			  __ETHTOOL_LINK_MODE_MASK_NBITS);
 467	bitmap_from_arr32(to->link_modes.lp_advertising,
 468			  link_usettings.link_modes.lp_advertising,
 469			  __ETHTOOL_LINK_MODE_MASK_NBITS);
 470
 471	return 0;
 472}
 473
 474/* Check if the user is trying to change anything besides speed/duplex */
 475bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
 476{
 477	struct ethtool_link_settings base2 = {};
 478
 479	base2.speed = cmd->base.speed;
 480	base2.port = PORT_OTHER;
 481	base2.duplex = cmd->base.duplex;
 482	base2.cmd = cmd->base.cmd;
 483	base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
 484
 485	return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
 486		bitmap_empty(cmd->link_modes.supported,
 487			     __ETHTOOL_LINK_MODE_MASK_NBITS) &&
 488		bitmap_empty(cmd->link_modes.lp_advertising,
 489			     __ETHTOOL_LINK_MODE_MASK_NBITS);
 490}
 491
 492/* convert a kernel internal ethtool_link_ksettings to
 493 * ethtool_link_usettings in user space. return 0 on success, errno on
 494 * error.
 495 */
 496static int
 497store_link_ksettings_for_user(void __user *to,
 498			      const struct ethtool_link_ksettings *from)
 499{
 500	struct ethtool_link_usettings link_usettings;
 501
 502	memcpy(&link_usettings, from, sizeof(link_usettings));
 503	bitmap_to_arr32(link_usettings.link_modes.supported,
 504			from->link_modes.supported,
 505			__ETHTOOL_LINK_MODE_MASK_NBITS);
 506	bitmap_to_arr32(link_usettings.link_modes.advertising,
 507			from->link_modes.advertising,
 508			__ETHTOOL_LINK_MODE_MASK_NBITS);
 509	bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 510			from->link_modes.lp_advertising,
 511			__ETHTOOL_LINK_MODE_MASK_NBITS);
 512
 513	if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 514		return -EFAULT;
 515
 516	return 0;
 517}
 518
 519/* Query device for its ethtool_link_settings. */
 520static int ethtool_get_link_ksettings(struct net_device *dev,
 521				      void __user *useraddr)
 522{
 523	int err = 0;
 524	struct ethtool_link_ksettings link_ksettings;
 525
 526	ASSERT_RTNL();
 527	if (!dev->ethtool_ops->get_link_ksettings)
 528		return -EOPNOTSUPP;
 529
 530	/* handle bitmap nbits handshake */
 531	if (copy_from_user(&link_ksettings.base, useraddr,
 532			   sizeof(link_ksettings.base)))
 533		return -EFAULT;
 534
 535	if (__ETHTOOL_LINK_MODE_MASK_NU32
 536	    != link_ksettings.base.link_mode_masks_nwords) {
 537		/* wrong link mode nbits requested */
 538		memset(&link_ksettings, 0, sizeof(link_ksettings));
 539		link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 540		/* send back number of words required as negative val */
 541		compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 542				   "need too many bits for link modes!");
 543		link_ksettings.base.link_mode_masks_nwords
 544			= -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 545
 546		/* copy the base fields back to user, not the link
 547		 * mode bitmaps
 548		 */
 549		if (copy_to_user(useraddr, &link_ksettings.base,
 550				 sizeof(link_ksettings.base)))
 551			return -EFAULT;
 552
 553		return 0;
 554	}
 555
 556	/* handshake successful: user/kernel agree on
 557	 * link_mode_masks_nwords
 558	 */
 559
 560	memset(&link_ksettings, 0, sizeof(link_ksettings));
 561	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 562	if (err < 0)
 563		return err;
 564
 565	/* make sure we tell the right values to user */
 566	link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 567	link_ksettings.base.link_mode_masks_nwords
 568		= __ETHTOOL_LINK_MODE_MASK_NU32;
 569	link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
 570	link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 571	link_ksettings.base.rate_matching = RATE_MATCH_NONE;
 572
 573	return store_link_ksettings_for_user(useraddr, &link_ksettings);
 574}
 575
 576/* Update device ethtool_link_settings. */
 577static int ethtool_set_link_ksettings(struct net_device *dev,
 578				      void __user *useraddr)
 579{
 580	struct ethtool_link_ksettings link_ksettings = {};
 581	int err;
 582
 583	ASSERT_RTNL();
 584
 585	if (!dev->ethtool_ops->set_link_ksettings)
 586		return -EOPNOTSUPP;
 587
 588	/* make sure nbits field has expected value */
 589	if (copy_from_user(&link_ksettings.base, useraddr,
 590			   sizeof(link_ksettings.base)))
 591		return -EFAULT;
 592
 593	if (__ETHTOOL_LINK_MODE_MASK_NU32
 594	    != link_ksettings.base.link_mode_masks_nwords)
 595		return -EINVAL;
 596
 597	/* copy the whole structure, now that we know it has expected
 598	 * format
 599	 */
 600	err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 601	if (err)
 602		return err;
 603
 604	/* re-check nwords field, just in case */
 605	if (__ETHTOOL_LINK_MODE_MASK_NU32
 606	    != link_ksettings.base.link_mode_masks_nwords)
 607		return -EINVAL;
 608
 609	if (link_ksettings.base.master_slave_cfg ||
 610	    link_ksettings.base.master_slave_state)
 611		return -EINVAL;
 612
 613	err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 614	if (err >= 0) {
 615		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 616		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 617	}
 618	return err;
 619}
 620
 621int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 622				       const struct ethtool_link_ksettings *cmd,
 623				       u32 *dev_speed, u8 *dev_duplex)
 624{
 625	u32 speed;
 626	u8 duplex;
 627
 628	speed = cmd->base.speed;
 629	duplex = cmd->base.duplex;
 630	/* don't allow custom speed and duplex */
 631	if (!ethtool_validate_speed(speed) ||
 632	    !ethtool_validate_duplex(duplex) ||
 633	    !ethtool_virtdev_validate_cmd(cmd))
 634		return -EINVAL;
 635	*dev_speed = speed;
 636	*dev_duplex = duplex;
 637
 638	return 0;
 639}
 640EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 641
 642/* Query device for its ethtool_cmd settings.
 643 *
 644 * Backward compatibility note: for compatibility with legacy ethtool, this is
 645 * now implemented via get_link_ksettings. When driver reports higher link mode
 646 * bits, a kernel warning is logged once (with name of 1st driver/device) to
 647 * recommend user to upgrade ethtool, but the command is successful (only the
 648 * lower link mode bits reported back to user). Deprecated fields from
 649 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 650 */
 651static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 652{
 653	struct ethtool_link_ksettings link_ksettings;
 654	struct ethtool_cmd cmd;
 655	int err;
 656
 657	ASSERT_RTNL();
 658	if (!dev->ethtool_ops->get_link_ksettings)
 659		return -EOPNOTSUPP;
 660
 661	memset(&link_ksettings, 0, sizeof(link_ksettings));
 662	err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 663	if (err < 0)
 664		return err;
 665	convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 666
 667	/* send a sensible cmd tag back to user */
 668	cmd.cmd = ETHTOOL_GSET;
 669
 670	if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 671		return -EFAULT;
 672
 673	return 0;
 674}
 675
 676/* Update device link settings with given ethtool_cmd.
 677 *
 678 * Backward compatibility note: for compatibility with legacy ethtool, this is
 679 * now always implemented via set_link_settings. When user's request updates
 680 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 681 * warning is logged once (with name of 1st driver/device) to recommend user to
 682 * upgrade ethtool, and the request is rejected.
 683 */
 684static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 685{
 686	struct ethtool_link_ksettings link_ksettings;
 687	struct ethtool_cmd cmd;
 688	int ret;
 689
 690	ASSERT_RTNL();
 691
 692	if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 693		return -EFAULT;
 694	if (!dev->ethtool_ops->set_link_ksettings)
 695		return -EOPNOTSUPP;
 696
 697	if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 698		return -EINVAL;
 699	link_ksettings.base.link_mode_masks_nwords =
 700		__ETHTOOL_LINK_MODE_MASK_NU32;
 701	ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 702	if (ret >= 0) {
 703		ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 704		ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 705	}
 706	return ret;
 707}
 708
 709static int
 710ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
 711{
 712	const struct ethtool_ops *ops = dev->ethtool_ops;
 713	struct device *parent = dev->dev.parent;
 714
 715	rsp->info.cmd = ETHTOOL_GDRVINFO;
 716	strscpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version));
 717	if (ops->get_drvinfo) {
 718		ops->get_drvinfo(dev, &rsp->info);
 719		if (!rsp->info.bus_info[0] && parent)
 720			strscpy(rsp->info.bus_info, dev_name(parent),
 721				sizeof(rsp->info.bus_info));
 722		if (!rsp->info.driver[0] && parent && parent->driver)
 723			strscpy(rsp->info.driver, parent->driver->name,
 724				sizeof(rsp->info.driver));
 725	} else if (parent && parent->driver) {
 726		strscpy(rsp->info.bus_info, dev_name(parent),
 727			sizeof(rsp->info.bus_info));
 728		strscpy(rsp->info.driver, parent->driver->name,
 729			sizeof(rsp->info.driver));
 730	} else if (dev->rtnl_link_ops) {
 731		strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
 732			sizeof(rsp->info.driver));
 733	} else {
 734		return -EOPNOTSUPP;
 735	}
 736
 737	/*
 738	 * this method of obtaining string set info is deprecated;
 739	 * Use ETHTOOL_GSSET_INFO instead.
 740	 */
 741	if (ops->get_sset_count) {
 742		int rc;
 743
 744		rc = ops->get_sset_count(dev, ETH_SS_TEST);
 745		if (rc >= 0)
 746			rsp->info.testinfo_len = rc;
 747		rc = ops->get_sset_count(dev, ETH_SS_STATS);
 748		if (rc >= 0)
 749			rsp->info.n_stats = rc;
 750		rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 751		if (rc >= 0)
 752			rsp->info.n_priv_flags = rc;
 753	}
 754	if (ops->get_regs_len) {
 755		int ret = ops->get_regs_len(dev);
 756
 757		if (ret > 0)
 758			rsp->info.regdump_len = ret;
 759	}
 760
 761	if (ops->get_eeprom_len)
 762		rsp->info.eedump_len = ops->get_eeprom_len(dev);
 763
 764	if (!rsp->info.fw_version[0])
 765		rsp->devlink = netdev_to_devlink_get(dev);
 766
 767	return 0;
 768}
 769
 770static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 771						    void __user *useraddr)
 772{
 773	struct ethtool_sset_info info;
 774	u64 sset_mask;
 775	int i, idx = 0, n_bits = 0, ret, rc;
 776	u32 *info_buf = NULL;
 777
 778	if (copy_from_user(&info, useraddr, sizeof(info)))
 779		return -EFAULT;
 780
 781	/* store copy of mask, because we zero struct later on */
 782	sset_mask = info.sset_mask;
 783	if (!sset_mask)
 784		return 0;
 785
 786	/* calculate size of return buffer */
 787	n_bits = hweight64(sset_mask);
 788
 789	memset(&info, 0, sizeof(info));
 790	info.cmd = ETHTOOL_GSSET_INFO;
 791
 792	info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 793	if (!info_buf)
 794		return -ENOMEM;
 795
 796	/*
 797	 * fill return buffer based on input bitmask and successful
 798	 * get_sset_count return
 799	 */
 800	for (i = 0; i < 64; i++) {
 801		if (!(sset_mask & (1ULL << i)))
 802			continue;
 803
 804		rc = __ethtool_get_sset_count(dev, i);
 805		if (rc >= 0) {
 806			info.sset_mask |= (1ULL << i);
 807			info_buf[idx++] = rc;
 808		}
 809	}
 810
 811	ret = -EFAULT;
 812	if (copy_to_user(useraddr, &info, sizeof(info)))
 813		goto out;
 814
 815	useraddr += offsetof(struct ethtool_sset_info, data);
 816	if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
 817		goto out;
 818
 819	ret = 0;
 820
 821out:
 822	kfree(info_buf);
 823	return ret;
 824}
 825
 826static noinline_for_stack int
 827ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
 828			       const struct compat_ethtool_rxnfc __user *useraddr,
 829			       size_t size)
 830{
 831	struct compat_ethtool_rxnfc crxnfc = {};
 832
 833	/* We expect there to be holes between fs.m_ext and
 834	 * fs.ring_cookie and at the end of fs, but nowhere else.
 835	 * On non-x86, no conversion should be needed.
 836	 */
 837	BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
 838		     sizeof(struct compat_ethtool_rxnfc) !=
 839		     sizeof(struct ethtool_rxnfc));
 840	BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
 841		     sizeof(useraddr->fs.m_ext) !=
 842		     offsetof(struct ethtool_rxnfc, fs.m_ext) +
 843		     sizeof(rxnfc->fs.m_ext));
 844	BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
 845		     offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
 846		     offsetof(struct ethtool_rxnfc, fs.location) -
 847		     offsetof(struct ethtool_rxnfc, fs.ring_cookie));
 848
 849	if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
 850		return -EFAULT;
 851
 852	*rxnfc = (struct ethtool_rxnfc) {
 853		.cmd		= crxnfc.cmd,
 854		.flow_type	= crxnfc.flow_type,
 855		.data		= crxnfc.data,
 856		.fs		= {
 857			.flow_type	= crxnfc.fs.flow_type,
 858			.h_u		= crxnfc.fs.h_u,
 859			.h_ext		= crxnfc.fs.h_ext,
 860			.m_u		= crxnfc.fs.m_u,
 861			.m_ext		= crxnfc.fs.m_ext,
 862			.ring_cookie	= crxnfc.fs.ring_cookie,
 863			.location	= crxnfc.fs.location,
 864		},
 865		.rule_cnt	= crxnfc.rule_cnt,
 866	};
 867
 868	return 0;
 869}
 870
 871static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
 872					const void __user *useraddr,
 873					size_t size)
 874{
 875	if (compat_need_64bit_alignment_fixup())
 876		return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
 877
 878	if (copy_from_user(rxnfc, useraddr, size))
 879		return -EFAULT;
 880
 881	return 0;
 882}
 883
 884static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
 885					const struct ethtool_rxnfc *rxnfc,
 886					size_t size, const u32 *rule_buf)
 887{
 888	struct compat_ethtool_rxnfc crxnfc;
 889
 890	memset(&crxnfc, 0, sizeof(crxnfc));
 891	crxnfc = (struct compat_ethtool_rxnfc) {
 892		.cmd		= rxnfc->cmd,
 893		.flow_type	= rxnfc->flow_type,
 894		.data		= rxnfc->data,
 895		.fs		= {
 896			.flow_type	= rxnfc->fs.flow_type,
 897			.h_u		= rxnfc->fs.h_u,
 898			.h_ext		= rxnfc->fs.h_ext,
 899			.m_u		= rxnfc->fs.m_u,
 900			.m_ext		= rxnfc->fs.m_ext,
 901			.ring_cookie	= rxnfc->fs.ring_cookie,
 902			.location	= rxnfc->fs.location,
 903		},
 904		.rule_cnt	= rxnfc->rule_cnt,
 905	};
 906
 907	if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
 908		return -EFAULT;
 909
 910	return 0;
 911}
 912
 913static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
 914				     size_t *info_size, void __user *useraddr)
 915{
 916	/* struct ethtool_rxnfc was originally defined for
 917	 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 918	 * members.  User-space might still be using that
 919	 * definition.
 920	 */
 921	if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
 922		*info_size = (offsetof(struct ethtool_rxnfc, data) +
 923			      sizeof(info->data));
 924
 925	if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 926		return -EFAULT;
 927
 928	if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
 929		*info_size = sizeof(*info);
 930		if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 931			return -EFAULT;
 932		/* Since malicious users may modify the original data,
 933		 * we need to check whether FLOW_RSS is still requested.
 934		 */
 935		if (!(info->flow_type & FLOW_RSS))
 936			return -EINVAL;
 937	}
 938
 939	if (info->cmd != cmd)
 940		return -EINVAL;
 941
 942	return 0;
 943}
 944
 945static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
 946				      const struct ethtool_rxnfc *rxnfc,
 947				      size_t size, const u32 *rule_buf)
 948{
 949	int ret;
 950
 951	if (compat_need_64bit_alignment_fixup()) {
 952		ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
 953						   rule_buf);
 954		useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
 955	} else {
 956		ret = copy_to_user(useraddr, rxnfc, size);
 957		useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 958	}
 959
 960	if (ret)
 961		return -EFAULT;
 962
 963	if (rule_buf) {
 964		if (copy_to_user(useraddr, rule_buf,
 965				 rxnfc->rule_cnt * sizeof(u32)))
 966			return -EFAULT;
 967	}
 968
 969	return 0;
 970}
 971
 972static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 973						u32 cmd, void __user *useraddr)
 974{
 975	const struct ethtool_ops *ops = dev->ethtool_ops;
 976	struct ethtool_rxnfc info;
 977	size_t info_size = sizeof(info);
 978	int rc;
 979
 980	if (!ops->set_rxnfc)
 981		return -EOPNOTSUPP;
 982
 983	rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
 984	if (rc)
 985		return rc;
 986
 987	if (ops->get_rxfh) {
 988		struct ethtool_rxfh_param rxfh = {};
 989
 990		rc = ops->get_rxfh(dev, &rxfh);
 991		if (rc)
 992			return rc;
 993
 994		/* Sanity check: if symmetric-xor is set, then:
 995		 * 1 - no other fields besides IP src/dst and/or L4 src/dst
 996		 * 2 - If src is set, dst must also be set
 997		 */
 998		if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
 999		    ((info.data & ~(RXH_IP_SRC | RXH_IP_DST |
1000				    RXH_L4_B_0_1 | RXH_L4_B_2_3)) ||
1001		     (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) ||
1002		     (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3))))
1003			return -EINVAL;
1004	}
1005
1006	rc = ops->set_rxnfc(dev, &info);
1007	if (rc)
1008		return rc;
1009
1010	if (cmd == ETHTOOL_SRXCLSRLINS &&
1011	    ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
1012		return -EFAULT;
1013
1014	return 0;
1015}
1016
1017static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1018						u32 cmd, void __user *useraddr)
1019{
1020	struct ethtool_rxnfc info;
1021	size_t info_size = sizeof(info);
1022	const struct ethtool_ops *ops = dev->ethtool_ops;
1023	int ret;
1024	void *rule_buf = NULL;
1025
1026	if (!ops->get_rxnfc)
1027		return -EOPNOTSUPP;
1028
1029	ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1030	if (ret)
1031		return ret;
1032
1033	if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1034		if (info.rule_cnt > 0) {
1035			if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1036				rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1037						   GFP_USER);
1038			if (!rule_buf)
1039				return -ENOMEM;
1040		}
1041	}
1042
1043	ret = ops->get_rxnfc(dev, &info, rule_buf);
1044	if (ret < 0)
1045		goto err_out;
1046
1047	ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1048err_out:
1049	kfree(rule_buf);
1050
1051	return ret;
1052}
1053
1054static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1055					struct ethtool_rxnfc *rx_rings,
1056					u32 size)
1057{
1058	int i;
1059
1060	if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1061		return -EFAULT;
1062
1063	/* Validate ring indices */
1064	for (i = 0; i < size; i++)
1065		if (indir[i] >= rx_rings->data)
1066			return -EINVAL;
1067
1068	return 0;
1069}
1070
1071u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1072
1073void netdev_rss_key_fill(void *buffer, size_t len)
1074{
1075	BUG_ON(len > sizeof(netdev_rss_key));
1076	net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1077	memcpy(buffer, netdev_rss_key, len);
1078}
1079EXPORT_SYMBOL(netdev_rss_key_fill);
1080
1081static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1082						     void __user *useraddr)
1083{
1084	struct ethtool_rxfh_param rxfh = {};
1085	u32 user_size;
1086	int ret;
1087
1088	if (!dev->ethtool_ops->get_rxfh_indir_size ||
1089	    !dev->ethtool_ops->get_rxfh)
1090		return -EOPNOTSUPP;
1091	rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1092	if (rxfh.indir_size == 0)
1093		return -EOPNOTSUPP;
1094
1095	if (copy_from_user(&user_size,
1096			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1097			   sizeof(user_size)))
1098		return -EFAULT;
1099
1100	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1101			 &rxfh.indir_size, sizeof(rxfh.indir_size)))
1102		return -EFAULT;
1103
1104	/* If the user buffer size is 0, this is just a query for the
1105	 * device table size.  Otherwise, if it's smaller than the
1106	 * device table size it's an error.
1107	 */
1108	if (user_size < rxfh.indir_size)
1109		return user_size == 0 ? 0 : -EINVAL;
1110
1111	rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
1112	if (!rxfh.indir)
1113		return -ENOMEM;
1114
1115	ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
1116	if (ret)
1117		goto out;
1118	if (copy_to_user(useraddr +
1119			 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1120			 rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
1121		ret = -EFAULT;
1122
1123out:
1124	kfree(rxfh.indir);
1125	return ret;
1126}
1127
1128static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1129						     void __user *useraddr)
1130{
1131	const struct ethtool_ops *ops = dev->ethtool_ops;
1132	struct ethtool_rxfh_param rxfh_dev = {};
1133	struct netlink_ext_ack *extack = NULL;
1134	struct ethtool_rxnfc rx_rings;
1135	u32 user_size, i;
1136	int ret;
1137	u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1138
1139	if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1140	    !ops->get_rxnfc)
1141		return -EOPNOTSUPP;
1142
1143	rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1144	if (rxfh_dev.indir_size == 0)
1145		return -EOPNOTSUPP;
1146
1147	if (copy_from_user(&user_size,
1148			   useraddr + offsetof(struct ethtool_rxfh_indir, size),
1149			   sizeof(user_size)))
1150		return -EFAULT;
1151
1152	if (user_size != 0 && user_size != rxfh_dev.indir_size)
1153		return -EINVAL;
1154
1155	rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
1156				 sizeof(rxfh_dev.indir[0]), GFP_USER);
1157	if (!rxfh_dev.indir)
1158		return -ENOMEM;
1159
1160	rx_rings.cmd = ETHTOOL_GRXRINGS;
1161	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1162	if (ret)
1163		goto out;
1164
1165	if (user_size == 0) {
1166		u32 *indir = rxfh_dev.indir;
1167
1168		for (i = 0; i < rxfh_dev.indir_size; i++)
1169			indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1170	} else {
1171		ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1172						  useraddr + ringidx_offset,
1173						  &rx_rings,
1174						  rxfh_dev.indir_size);
1175		if (ret)
1176			goto out;
1177	}
1178
1179	rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;
1180	ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1181	if (ret)
1182		goto out;
1183
1184	/* indicate whether rxfh was set to default */
1185	if (user_size == 0)
1186		dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1187	else
1188		dev->priv_flags |= IFF_RXFH_CONFIGURED;
1189
1190out:
1191	kfree(rxfh_dev.indir);
1192	return ret;
1193}
1194
1195static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1196					       void __user *useraddr)
1197{
1198	const struct ethtool_ops *ops = dev->ethtool_ops;
1199	struct ethtool_rxfh_param rxfh_dev = {};
1200	u32 user_indir_size, user_key_size;
1201	struct ethtool_rxfh rxfh;
1202	u32 indir_bytes;
1203	u8 *rss_config;
1204	u32 total_size;
1205	int ret;
1206
1207	if (!ops->get_rxfh)
1208		return -EOPNOTSUPP;
1209
1210	if (ops->get_rxfh_indir_size)
1211		rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1212	if (ops->get_rxfh_key_size)
1213		rxfh_dev.key_size = ops->get_rxfh_key_size(dev);
1214
1215	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1216		return -EFAULT;
1217	user_indir_size = rxfh.indir_size;
1218	user_key_size = rxfh.key_size;
1219
1220	/* Check that reserved fields are 0 for now */
1221	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1222		return -EINVAL;
1223	/* Most drivers don't handle rss_context, check it's 0 as well */
1224	if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1225		return -EOPNOTSUPP;
1226
1227	rxfh.indir_size = rxfh_dev.indir_size;
1228	rxfh.key_size = rxfh_dev.key_size;
1229	if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1230		return -EFAULT;
1231
1232	if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
1233	    (user_key_size && user_key_size != rxfh_dev.key_size))
1234		return -EINVAL;
1235
1236	indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
1237	total_size = indir_bytes + user_key_size;
1238	rss_config = kzalloc(total_size, GFP_USER);
1239	if (!rss_config)
1240		return -ENOMEM;
1241
1242	if (user_indir_size)
1243		rxfh_dev.indir = (u32 *)rss_config;
1244
1245	if (user_key_size)
1246		rxfh_dev.key = rss_config + indir_bytes;
1247
1248	rxfh_dev.rss_context = rxfh.rss_context;
1249
1250	ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
1251	if (ret)
1252		goto out;
1253
1254	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1255			 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
1256		ret = -EFAULT;
1257	} else if (copy_to_user(useraddr +
1258				offsetof(struct ethtool_rxfh, input_xfrm),
1259				&rxfh_dev.input_xfrm,
1260				sizeof(rxfh.input_xfrm))) {
1261		ret = -EFAULT;
1262	} else if (copy_to_user(useraddr +
1263			      offsetof(struct ethtool_rxfh, rss_config[0]),
1264			      rss_config, total_size)) {
1265		ret = -EFAULT;
1266	}
1267out:
1268	kfree(rss_config);
1269
1270	return ret;
1271}
1272
1273static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1274					       void __user *useraddr)
1275{
1276	u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1277	const struct ethtool_ops *ops = dev->ethtool_ops;
1278	u32 dev_indir_size = 0, dev_key_size = 0, i;
1279	struct ethtool_rxfh_param rxfh_dev = {};
1280	struct netlink_ext_ack *extack = NULL;
1281	struct ethtool_rxnfc rx_rings;
1282	struct ethtool_rxfh rxfh;
1283	u32 indir_bytes = 0;
1284	u8 *rss_config;
1285	int ret;
1286
1287	if (!ops->get_rxnfc || !ops->set_rxfh)
1288		return -EOPNOTSUPP;
1289
1290	if (ops->get_rxfh_indir_size)
1291		dev_indir_size = ops->get_rxfh_indir_size(dev);
1292	if (ops->get_rxfh_key_size)
1293		dev_key_size = ops->get_rxfh_key_size(dev);
1294
1295	if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1296		return -EFAULT;
1297
1298	/* Check that reserved fields are 0 for now */
1299	if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1300		return -EINVAL;
1301	/* Most drivers don't handle rss_context, check it's 0 as well */
1302	if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1303		return -EOPNOTSUPP;
1304	/* Check input data transformation capabilities */
1305	if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
1306	    rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
1307		return -EINVAL;
1308	if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1309	    !ops->cap_rss_sym_xor_supported)
1310		return -EOPNOTSUPP;
1311
1312	/* If either indir, hash key or function is valid, proceed further.
1313	 * Must request at least one change: indir size, hash key, function
1314	 * or input transformation.
1315	 */
1316	if ((rxfh.indir_size &&
1317	     rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1318	     rxfh.indir_size != dev_indir_size) ||
1319	    (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1320	    (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1321	     rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
1322	     rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
1323		return -EINVAL;
1324
1325	if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1326		indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);
1327
1328	rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1329	if (!rss_config)
1330		return -ENOMEM;
1331
1332	rx_rings.cmd = ETHTOOL_GRXRINGS;
1333	ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1334	if (ret)
1335		goto out;
1336
1337	/* rxfh.indir_size == 0 means reset the indir table to default (master
1338	 * context) or delete the context (other RSS contexts).
1339	 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1340	 */
1341	if (rxfh.indir_size &&
1342	    rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1343		rxfh_dev.indir = (u32 *)rss_config;
1344		rxfh_dev.indir_size = dev_indir_size;
1345		ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1346						  useraddr + rss_cfg_offset,
1347						  &rx_rings,
1348						  rxfh.indir_size);
1349		if (ret)
1350			goto out;
1351	} else if (rxfh.indir_size == 0) {
1352		if (rxfh.rss_context == 0) {
1353			u32 *indir;
1354
1355			rxfh_dev.indir = (u32 *)rss_config;
1356			rxfh_dev.indir_size = dev_indir_size;
1357			indir = rxfh_dev.indir;
1358			for (i = 0; i < dev_indir_size; i++)
1359				indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1360		} else {
1361			rxfh_dev.rss_delete = true;
1362		}
1363	}
1364
1365	if (rxfh.key_size) {
1366		rxfh_dev.key_size = dev_key_size;
1367		rxfh_dev.key = rss_config + indir_bytes;
1368		if (copy_from_user(rxfh_dev.key,
1369				   useraddr + rss_cfg_offset + indir_bytes,
1370				   rxfh.key_size)) {
1371			ret = -EFAULT;
1372			goto out;
1373		}
1374	}
1375
1376	rxfh_dev.hfunc = rxfh.hfunc;
1377	rxfh_dev.rss_context = rxfh.rss_context;
1378	rxfh_dev.input_xfrm = rxfh.input_xfrm;
1379
1380	ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1381	if (ret)
1382		goto out;
1383
1384	if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1385			 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
1386		ret = -EFAULT;
1387
1388	if (!rxfh_dev.rss_context) {
1389		/* indicate whether rxfh was set to default */
1390		if (rxfh.indir_size == 0)
1391			dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1392		else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1393			dev->priv_flags |= IFF_RXFH_CONFIGURED;
1394	}
1395
1396out:
1397	kfree(rss_config);
1398	return ret;
1399}
1400
1401static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1402{
1403	struct ethtool_regs regs;
1404	const struct ethtool_ops *ops = dev->ethtool_ops;
1405	void *regbuf;
1406	int reglen, ret;
1407
1408	if (!ops->get_regs || !ops->get_regs_len)
1409		return -EOPNOTSUPP;
1410
1411	if (copy_from_user(&regs, useraddr, sizeof(regs)))
1412		return -EFAULT;
1413
1414	reglen = ops->get_regs_len(dev);
1415	if (reglen <= 0)
1416		return reglen;
1417
1418	if (regs.len > reglen)
1419		regs.len = reglen;
1420
1421	regbuf = vzalloc(reglen);
1422	if (!regbuf)
1423		return -ENOMEM;
1424
1425	if (regs.len < reglen)
1426		reglen = regs.len;
1427
1428	ops->get_regs(dev, &regs, regbuf);
1429
1430	ret = -EFAULT;
1431	if (copy_to_user(useraddr, &regs, sizeof(regs)))
1432		goto out;
1433	useraddr += offsetof(struct ethtool_regs, data);
1434	if (copy_to_user(useraddr, regbuf, reglen))
1435		goto out;
1436	ret = 0;
1437
1438 out:
1439	vfree(regbuf);
1440	return ret;
1441}
1442
1443static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1444{
1445	struct ethtool_value reset;
1446	int ret;
1447
1448	if (!dev->ethtool_ops->reset)
1449		return -EOPNOTSUPP;
1450
1451	if (copy_from_user(&reset, useraddr, sizeof(reset)))
1452		return -EFAULT;
1453
1454	ret = dev->ethtool_ops->reset(dev, &reset.data);
1455	if (ret)
1456		return ret;
1457
1458	if (copy_to_user(useraddr, &reset, sizeof(reset)))
1459		return -EFAULT;
1460	return 0;
1461}
1462
1463static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1464{
1465	struct ethtool_wolinfo wol;
1466
1467	if (!dev->ethtool_ops->get_wol)
1468		return -EOPNOTSUPP;
1469
1470	memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1471	wol.cmd = ETHTOOL_GWOL;
1472	dev->ethtool_ops->get_wol(dev, &wol);
1473
1474	if (copy_to_user(useraddr, &wol, sizeof(wol)))
1475		return -EFAULT;
1476	return 0;
1477}
1478
1479static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1480{
1481	struct ethtool_wolinfo wol, cur_wol;
1482	int ret;
1483
1484	if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1485		return -EOPNOTSUPP;
1486
1487	memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1488	cur_wol.cmd = ETHTOOL_GWOL;
1489	dev->ethtool_ops->get_wol(dev, &cur_wol);
1490
1491	if (copy_from_user(&wol, useraddr, sizeof(wol)))
1492		return -EFAULT;
1493
1494	if (wol.wolopts & ~cur_wol.supported)
1495		return -EINVAL;
1496
1497	if (wol.wolopts == cur_wol.wolopts &&
1498	    !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1499		return 0;
1500
1501	ret = dev->ethtool_ops->set_wol(dev, &wol);
1502	if (ret)
1503		return ret;
1504
1505	dev->wol_enabled = !!wol.wolopts;
1506	ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1507
1508	return 0;
1509}
1510
1511static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1512{
1513	struct ethtool_eee edata;
1514	int rc;
1515
1516	if (!dev->ethtool_ops->get_eee)
1517		return -EOPNOTSUPP;
1518
1519	memset(&edata, 0, sizeof(struct ethtool_eee));
1520	edata.cmd = ETHTOOL_GEEE;
1521	rc = dev->ethtool_ops->get_eee(dev, &edata);
1522
1523	if (rc)
1524		return rc;
1525
1526	if (copy_to_user(useraddr, &edata, sizeof(edata)))
1527		return -EFAULT;
1528
1529	return 0;
1530}
1531
1532static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1533{
1534	struct ethtool_eee edata;
1535	int ret;
1536
1537	if (!dev->ethtool_ops->set_eee)
1538		return -EOPNOTSUPP;
1539
1540	if (copy_from_user(&edata, useraddr, sizeof(edata)))
1541		return -EFAULT;
1542
1543	ret = dev->ethtool_ops->set_eee(dev, &edata);
1544	if (!ret)
1545		ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1546	return ret;
1547}
1548
1549static int ethtool_nway_reset(struct net_device *dev)
1550{
1551	if (!dev->ethtool_ops->nway_reset)
1552		return -EOPNOTSUPP;
1553
1554	return dev->ethtool_ops->nway_reset(dev);
1555}
1556
1557static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1558{
1559	struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1560	int link = __ethtool_get_link(dev);
1561
1562	if (link < 0)
1563		return link;
1564
1565	edata.data = link;
1566	if (copy_to_user(useraddr, &edata, sizeof(edata)))
1567		return -EFAULT;
1568	return 0;
1569}
1570
1571static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1572				  int (*getter)(struct net_device *,
1573						struct ethtool_eeprom *, u8 *),
1574				  u32 total_len)
1575{
1576	struct ethtool_eeprom eeprom;
1577	void __user *userbuf = useraddr + sizeof(eeprom);
1578	u32 bytes_remaining;
1579	u8 *data;
1580	int ret = 0;
1581
1582	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1583		return -EFAULT;
1584
1585	/* Check for wrap and zero */
1586	if (eeprom.offset + eeprom.len <= eeprom.offset)
1587		return -EINVAL;
1588
1589	/* Check for exceeding total eeprom len */
1590	if (eeprom.offset + eeprom.len > total_len)
1591		return -EINVAL;
1592
1593	data = kzalloc(PAGE_SIZE, GFP_USER);
1594	if (!data)
1595		return -ENOMEM;
1596
1597	bytes_remaining = eeprom.len;
1598	while (bytes_remaining > 0) {
1599		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1600
1601		ret = getter(dev, &eeprom, data);
1602		if (ret)
1603			break;
1604		if (!eeprom.len) {
1605			ret = -EIO;
1606			break;
1607		}
1608		if (copy_to_user(userbuf, data, eeprom.len)) {
1609			ret = -EFAULT;
1610			break;
1611		}
1612		userbuf += eeprom.len;
1613		eeprom.offset += eeprom.len;
1614		bytes_remaining -= eeprom.len;
1615	}
1616
1617	eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1618	eeprom.offset -= eeprom.len;
1619	if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1620		ret = -EFAULT;
1621
1622	kfree(data);
1623	return ret;
1624}
1625
1626static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1627{
1628	const struct ethtool_ops *ops = dev->ethtool_ops;
1629
1630	if (!ops->get_eeprom || !ops->get_eeprom_len ||
1631	    !ops->get_eeprom_len(dev))
1632		return -EOPNOTSUPP;
1633
1634	return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1635				      ops->get_eeprom_len(dev));
1636}
1637
1638static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1639{
1640	struct ethtool_eeprom eeprom;
1641	const struct ethtool_ops *ops = dev->ethtool_ops;
1642	void __user *userbuf = useraddr + sizeof(eeprom);
1643	u32 bytes_remaining;
1644	u8 *data;
1645	int ret = 0;
1646
1647	if (!ops->set_eeprom || !ops->get_eeprom_len ||
1648	    !ops->get_eeprom_len(dev))
1649		return -EOPNOTSUPP;
1650
1651	if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1652		return -EFAULT;
1653
1654	/* Check for wrap and zero */
1655	if (eeprom.offset + eeprom.len <= eeprom.offset)
1656		return -EINVAL;
1657
1658	/* Check for exceeding total eeprom len */
1659	if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1660		return -EINVAL;
1661
1662	data = kzalloc(PAGE_SIZE, GFP_USER);
1663	if (!data)
1664		return -ENOMEM;
1665
1666	bytes_remaining = eeprom.len;
1667	while (bytes_remaining > 0) {
1668		eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1669
1670		if (copy_from_user(data, userbuf, eeprom.len)) {
1671			ret = -EFAULT;
1672			break;
1673		}
1674		ret = ops->set_eeprom(dev, &eeprom, data);
1675		if (ret)
1676			break;
1677		userbuf += eeprom.len;
1678		eeprom.offset += eeprom.len;
1679		bytes_remaining -= eeprom.len;
1680	}
1681
1682	kfree(data);
1683	return ret;
1684}
1685
1686static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1687						   void __user *useraddr)
1688{
1689	struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1690	struct kernel_ethtool_coalesce kernel_coalesce = {};
1691	int ret;
1692
1693	if (!dev->ethtool_ops->get_coalesce)
1694		return -EOPNOTSUPP;
1695
1696	ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1697					     NULL);
1698	if (ret)
1699		return ret;
1700
1701	if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1702		return -EFAULT;
1703	return 0;
1704}
1705
1706static bool
1707ethtool_set_coalesce_supported(struct net_device *dev,
1708			       struct ethtool_coalesce *coalesce)
1709{
1710	u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1711	u32 nonzero_params = 0;
1712
1713	if (coalesce->rx_coalesce_usecs)
1714		nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1715	if (coalesce->rx_max_coalesced_frames)
1716		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1717	if (coalesce->rx_coalesce_usecs_irq)
1718		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1719	if (coalesce->rx_max_coalesced_frames_irq)
1720		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1721	if (coalesce->tx_coalesce_usecs)
1722		nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1723	if (coalesce->tx_max_coalesced_frames)
1724		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1725	if (coalesce->tx_coalesce_usecs_irq)
1726		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1727	if (coalesce->tx_max_coalesced_frames_irq)
1728		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1729	if (coalesce->stats_block_coalesce_usecs)
1730		nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1731	if (coalesce->use_adaptive_rx_coalesce)
1732		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1733	if (coalesce->use_adaptive_tx_coalesce)
1734		nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1735	if (coalesce->pkt_rate_low)
1736		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1737	if (coalesce->rx_coalesce_usecs_low)
1738		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1739	if (coalesce->rx_max_coalesced_frames_low)
1740		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1741	if (coalesce->tx_coalesce_usecs_low)
1742		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1743	if (coalesce->tx_max_coalesced_frames_low)
1744		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1745	if (coalesce->pkt_rate_high)
1746		nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1747	if (coalesce->rx_coalesce_usecs_high)
1748		nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1749	if (coalesce->rx_max_coalesced_frames_high)
1750		nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1751	if (coalesce->tx_coalesce_usecs_high)
1752		nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1753	if (coalesce->tx_max_coalesced_frames_high)
1754		nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1755	if (coalesce->rate_sample_interval)
1756		nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1757
1758	return (supported_params & nonzero_params) == nonzero_params;
1759}
1760
1761static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1762						   void __user *useraddr)
1763{
1764	struct kernel_ethtool_coalesce kernel_coalesce = {};
1765	struct ethtool_coalesce coalesce;
1766	int ret;
1767
1768	if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
1769		return -EOPNOTSUPP;
1770
1771	ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1772					     NULL);
1773	if (ret)
1774		return ret;
1775
1776	if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1777		return -EFAULT;
1778
1779	if (!ethtool_set_coalesce_supported(dev, &coalesce))
1780		return -EOPNOTSUPP;
1781
1782	ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1783					     NULL);
1784	if (!ret)
1785		ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1786	return ret;
1787}
1788
1789static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1790{
1791	struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1792	struct kernel_ethtool_ringparam kernel_ringparam = {};
1793
1794	if (!dev->ethtool_ops->get_ringparam)
1795		return -EOPNOTSUPP;
1796
1797	dev->ethtool_ops->get_ringparam(dev, &ringparam,
1798					&kernel_ringparam, NULL);
1799
1800	if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1801		return -EFAULT;
1802	return 0;
1803}
1804
1805static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1806{
1807	struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1808	struct kernel_ethtool_ringparam kernel_ringparam;
1809	int ret;
1810
1811	if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1812		return -EOPNOTSUPP;
1813
1814	if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1815		return -EFAULT;
1816
1817	dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
1818
1819	/* ensure new ring parameters are within the maximums */
1820	if (ringparam.rx_pending > max.rx_max_pending ||
1821	    ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1822	    ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1823	    ringparam.tx_pending > max.tx_max_pending)
1824		return -EINVAL;
1825
1826	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
1827					      &kernel_ringparam, NULL);
1828	if (!ret)
1829		ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1830	return ret;
1831}
1832
1833static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1834						   void __user *useraddr)
1835{
1836	struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1837
1838	if (!dev->ethtool_ops->get_channels)
1839		return -EOPNOTSUPP;
1840
1841	dev->ethtool_ops->get_channels(dev, &channels);
1842
1843	if (copy_to_user(useraddr, &channels, sizeof(channels)))
1844		return -EFAULT;
1845	return 0;
1846}
1847
1848static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1849						   void __user *useraddr)
1850{
1851	struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1852	u16 from_channel, to_channel;
1853	u64 max_rxnfc_in_use;
1854	u32 max_rxfh_in_use;
1855	unsigned int i;
1856	int ret;
1857
1858	if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1859		return -EOPNOTSUPP;
1860
1861	if (copy_from_user(&channels, useraddr, sizeof(channels)))
1862		return -EFAULT;
1863
1864	dev->ethtool_ops->get_channels(dev, &curr);
1865
1866	if (channels.rx_count == curr.rx_count &&
1867	    channels.tx_count == curr.tx_count &&
1868	    channels.combined_count == curr.combined_count &&
1869	    channels.other_count == curr.other_count)
1870		return 0;
1871
1872	/* ensure new counts are within the maximums */
1873	if (channels.rx_count > curr.max_rx ||
1874	    channels.tx_count > curr.max_tx ||
1875	    channels.combined_count > curr.max_combined ||
1876	    channels.other_count > curr.max_other)
1877		return -EINVAL;
1878
1879	/* ensure there is at least one RX and one TX channel */
1880	if (!channels.combined_count &&
1881	    (!channels.rx_count || !channels.tx_count))
1882		return -EINVAL;
1883
1884	/* ensure the new Rx count fits within the configured Rx flow
1885	 * indirection table/rxnfc settings */
1886	if (ethtool_get_max_rxnfc_channel(dev, &max_rxnfc_in_use))
1887		max_rxnfc_in_use = 0;
1888	if (!netif_is_rxfh_configured(dev) ||
1889	    ethtool_get_max_rxfh_channel(dev, &max_rxfh_in_use))
1890		max_rxfh_in_use = 0;
1891	if (channels.combined_count + channels.rx_count <=
1892	    max_t(u64, max_rxnfc_in_use, max_rxfh_in_use))
1893		return -EINVAL;
1894
1895	/* Disabling channels, query zero-copy AF_XDP sockets */
1896	from_channel = channels.combined_count +
1897		min(channels.rx_count, channels.tx_count);
1898	to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1899	for (i = from_channel; i < to_channel; i++)
1900		if (xsk_get_pool_from_qid(dev, i))
1901			return -EINVAL;
1902
1903	ret = dev->ethtool_ops->set_channels(dev, &channels);
1904	if (!ret)
1905		ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1906	return ret;
1907}
1908
1909static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1910{
1911	struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1912
1913	if (!dev->ethtool_ops->get_pauseparam)
1914		return -EOPNOTSUPP;
1915
1916	dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1917
1918	if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1919		return -EFAULT;
1920	return 0;
1921}
1922
1923static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1924{
1925	struct ethtool_pauseparam pauseparam;
1926	int ret;
1927
1928	if (!dev->ethtool_ops->set_pauseparam)
1929		return -EOPNOTSUPP;
1930
1931	if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1932		return -EFAULT;
1933
1934	ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1935	if (!ret)
1936		ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1937	return ret;
1938}
1939
1940static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1941{
1942	struct ethtool_test test;
1943	const struct ethtool_ops *ops = dev->ethtool_ops;
1944	u64 *data;
1945	int ret, test_len;
1946
1947	if (!ops->self_test || !ops->get_sset_count)
1948		return -EOPNOTSUPP;
1949
1950	test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1951	if (test_len < 0)
1952		return test_len;
1953	WARN_ON(test_len == 0);
1954
1955	if (copy_from_user(&test, useraddr, sizeof(test)))
1956		return -EFAULT;
1957
1958	test.len = test_len;
1959	data = kcalloc(test_len, sizeof(u64), GFP_USER);
1960	if (!data)
1961		return -ENOMEM;
1962
1963	netif_testing_on(dev);
1964	ops->self_test(dev, &test, data);
1965	netif_testing_off(dev);
1966
1967	ret = -EFAULT;
1968	if (copy_to_user(useraddr, &test, sizeof(test)))
1969		goto out;
1970	useraddr += sizeof(test);
1971	if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
1972		goto out;
1973	ret = 0;
1974
1975 out:
1976	kfree(data);
1977	return ret;
1978}
1979
1980static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1981{
1982	struct ethtool_gstrings gstrings;
1983	u8 *data;
1984	int ret;
1985
1986	if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1987		return -EFAULT;
1988
1989	ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1990	if (ret < 0)
1991		return ret;
1992	if (ret > S32_MAX / ETH_GSTRING_LEN)
1993		return -ENOMEM;
1994	WARN_ON_ONCE(!ret);
1995
1996	gstrings.len = ret;
1997
1998	if (gstrings.len) {
1999		data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
2000		if (!data)
2001			return -ENOMEM;
2002
2003		__ethtool_get_strings(dev, gstrings.string_set, data);
2004	} else {
2005		data = NULL;
2006	}
2007
2008	ret = -EFAULT;
2009	if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
2010		goto out;
2011	useraddr += sizeof(gstrings);
2012	if (gstrings.len &&
2013	    copy_to_user(useraddr, data,
2014			 array_size(gstrings.len, ETH_GSTRING_LEN)))
2015		goto out;
2016	ret = 0;
2017
2018out:
2019	vfree(data);
2020	return ret;
2021}
2022
2023__printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
2024{
2025	va_list args;
2026
2027	va_start(args, fmt);
2028	vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
2029	va_end(args);
2030
2031	*data += ETH_GSTRING_LEN;
2032}
2033EXPORT_SYMBOL(ethtool_sprintf);
2034
2035void ethtool_puts(u8 **data, const char *str)
2036{
2037	strscpy(*data, str, ETH_GSTRING_LEN);
2038	*data += ETH_GSTRING_LEN;
2039}
2040EXPORT_SYMBOL(ethtool_puts);
2041
2042static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
2043{
2044	struct ethtool_value id;
2045	static bool busy;
2046	const struct ethtool_ops *ops = dev->ethtool_ops;
2047	netdevice_tracker dev_tracker;
2048	int rc;
2049
2050	if (!ops->set_phys_id)
2051		return -EOPNOTSUPP;
2052
2053	if (busy)
2054		return -EBUSY;
2055
2056	if (copy_from_user(&id, useraddr, sizeof(id)))
2057		return -EFAULT;
2058
2059	rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2060	if (rc < 0)
2061		return rc;
2062
2063	/* Drop the RTNL lock while waiting, but prevent reentry or
2064	 * removal of the device.
2065	 */
2066	busy = true;
2067	netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2068	rtnl_unlock();
2069
2070	if (rc == 0) {
2071		/* Driver will handle this itself */
2072		schedule_timeout_interruptible(
2073			id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2074	} else {
2075		/* Driver expects to be called at twice the frequency in rc */
2076		int n = rc * 2, interval = HZ / n;
2077		u64 count = mul_u32_u32(n, id.data);
2078		u64 i = 0;
2079
2080		do {
2081			rtnl_lock();
2082			rc = ops->set_phys_id(dev,
2083				    (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2084			rtnl_unlock();
2085			if (rc)
2086				break;
2087			schedule_timeout_interruptible(interval);
2088		} while (!signal_pending(current) && (!id.data || i < count));
2089	}
2090
2091	rtnl_lock();
2092	netdev_put(dev, &dev_tracker);
2093	busy = false;
2094
2095	(void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2096	return rc;
2097}
2098
2099static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2100{
2101	struct ethtool_stats stats;
2102	const struct ethtool_ops *ops = dev->ethtool_ops;
2103	u64 *data;
2104	int ret, n_stats;
2105
2106	if (!ops->get_ethtool_stats || !ops->get_sset_count)
2107		return -EOPNOTSUPP;
2108
2109	n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2110	if (n_stats < 0)
2111		return n_stats;
2112	if (n_stats > S32_MAX / sizeof(u64))
2113		return -ENOMEM;
2114	WARN_ON_ONCE(!n_stats);
2115	if (copy_from_user(&stats, useraddr, sizeof(stats)))
2116		return -EFAULT;
2117
2118	stats.n_stats = n_stats;
2119
2120	if (n_stats) {
2121		data = vzalloc(array_size(n_stats, sizeof(u64)));
2122		if (!data)
2123			return -ENOMEM;
2124		ops->get_ethtool_stats(dev, &stats, data);
2125	} else {
2126		data = NULL;
2127	}
2128
2129	ret = -EFAULT;
2130	if (copy_to_user(useraddr, &stats, sizeof(stats)))
2131		goto out;
2132	useraddr += sizeof(stats);
2133	if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2134		goto out;
2135	ret = 0;
2136
2137 out:
2138	vfree(data);
2139	return ret;
2140}
2141
2142static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2143{
2144	if (n_stats < 0)
2145		return n_stats;
2146	if (n_stats > S32_MAX / sizeof(u64))
2147		return -ENOMEM;
2148	if (WARN_ON_ONCE(!n_stats))
2149		return -EOPNOTSUPP;
2150
2151	*data = vzalloc(array_size(n_stats, sizeof(u64)));
2152	if (!*data)
2153		return -ENOMEM;
2154
2155	return 0;
2156}
2157
2158static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2159					 struct ethtool_stats *stats,
2160					 u64 **data)
2161 {
2162	const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2163	int n_stats, ret;
2164
2165	if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2166		return -EOPNOTSUPP;
2167
2168	n_stats = phy_ops->get_sset_count(phydev);
2169
2170	ret = ethtool_vzalloc_stats_array(n_stats, data);
2171	if (ret)
2172		return ret;
2173
2174	stats->n_stats = n_stats;
2175	return phy_ops->get_stats(phydev, stats, *data);
2176}
2177
2178static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2179					  struct ethtool_stats *stats,
2180					  u64 **data)
2181{
2182	const struct ethtool_ops *ops = dev->ethtool_ops;
2183	int n_stats, ret;
2184
2185	if (!ops || !ops->get_sset_count || ops->get_ethtool_phy_stats)
2186		return -EOPNOTSUPP;
2187
2188	n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2189
2190	ret = ethtool_vzalloc_stats_array(n_stats, data);
2191	if (ret)
2192		return ret;
2193
2194	stats->n_stats = n_stats;
2195	ops->get_ethtool_phy_stats(dev, stats, *data);
2196
2197	return 0;
2198}
2199
2200static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2201{
2202	struct phy_device *phydev = dev->phydev;
2203	struct ethtool_stats stats;
2204	u64 *data = NULL;
2205	int ret = -EOPNOTSUPP;
2206
2207	if (copy_from_user(&stats, useraddr, sizeof(stats)))
2208		return -EFAULT;
2209
2210	if (phydev)
2211		ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2212
2213	if (ret == -EOPNOTSUPP)
2214		ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2215
2216	if (ret)
2217		goto out;
2218
2219	if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2220		ret = -EFAULT;
2221		goto out;
2222	}
2223
2224	useraddr += sizeof(stats);
2225	if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2226		ret = -EFAULT;
2227
2228 out:
2229	vfree(data);
2230	return ret;
2231}
2232
2233static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2234{
2235	struct ethtool_perm_addr epaddr;
2236
2237	if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2238		return -EFAULT;
2239
2240	if (epaddr.size < dev->addr_len)
2241		return -ETOOSMALL;
2242	epaddr.size = dev->addr_len;
2243
2244	if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2245		return -EFAULT;
2246	useraddr += sizeof(epaddr);
2247	if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2248		return -EFAULT;
2249	return 0;
2250}
2251
2252static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2253			     u32 cmd, u32 (*actor)(struct net_device *))
2254{
2255	struct ethtool_value edata = { .cmd = cmd };
2256
2257	if (!actor)
2258		return -EOPNOTSUPP;
2259
2260	edata.data = actor(dev);
2261
2262	if (copy_to_user(useraddr, &edata, sizeof(edata)))
2263		return -EFAULT;
2264	return 0;
2265}
2266
2267static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2268			     void (*actor)(struct net_device *, u32))
2269{
2270	struct ethtool_value edata;
2271
2272	if (!actor)
2273		return -EOPNOTSUPP;
2274
2275	if (copy_from_user(&edata, useraddr, sizeof(edata)))
2276		return -EFAULT;
2277
2278	actor(dev, edata.data);
2279	return 0;
2280}
2281
2282static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2283			     int (*actor)(struct net_device *, u32))
2284{
2285	struct ethtool_value edata;
2286
2287	if (!actor)
2288		return -EOPNOTSUPP;
2289
2290	if (copy_from_user(&edata, useraddr, sizeof(edata)))
2291		return -EFAULT;
2292
2293	return actor(dev, edata.data);
2294}
2295
2296static int
2297ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2298{
2299	if (!dev->ethtool_ops->flash_device) {
2300		req->devlink = netdev_to_devlink_get(dev);
2301		return 0;
2302	}
2303
2304	return dev->ethtool_ops->flash_device(dev, &req->efl);
2305}
2306
2307static int ethtool_set_dump(struct net_device *dev,
2308			void __user *useraddr)
2309{
2310	struct ethtool_dump dump;
2311
2312	if (!dev->ethtool_ops->set_dump)
2313		return -EOPNOTSUPP;
2314
2315	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2316		return -EFAULT;
2317
2318	return dev->ethtool_ops->set_dump(dev, &dump);
2319}
2320
2321static int ethtool_get_dump_flag(struct net_device *dev,
2322				void __user *useraddr)
2323{
2324	int ret;
2325	struct ethtool_dump dump;
2326	const struct ethtool_ops *ops = dev->ethtool_ops;
2327
2328	if (!ops->get_dump_flag)
2329		return -EOPNOTSUPP;
2330
2331	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2332		return -EFAULT;
2333
2334	ret = ops->get_dump_flag(dev, &dump);
2335	if (ret)
2336		return ret;
2337
2338	if (copy_to_user(useraddr, &dump, sizeof(dump)))
2339		return -EFAULT;
2340	return 0;
2341}
2342
2343static int ethtool_get_dump_data(struct net_device *dev,
2344				void __user *useraddr)
2345{
2346	int ret;
2347	__u32 len;
2348	struct ethtool_dump dump, tmp;
2349	const struct ethtool_ops *ops = dev->ethtool_ops;
2350	void *data = NULL;
2351
2352	if (!ops->get_dump_data || !ops->get_dump_flag)
2353		return -EOPNOTSUPP;
2354
2355	if (copy_from_user(&dump, useraddr, sizeof(dump)))
2356		return -EFAULT;
2357
2358	memset(&tmp, 0, sizeof(tmp));
2359	tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2360	ret = ops->get_dump_flag(dev, &tmp);
2361	if (ret)
2362		return ret;
2363
2364	len = min(tmp.len, dump.len);
2365	if (!len)
2366		return -EFAULT;
2367
2368	/* Don't ever let the driver think there's more space available
2369	 * than it requested with .get_dump_flag().
2370	 */
2371	dump.len = len;
2372
2373	/* Always allocate enough space to hold the whole thing so that the
2374	 * driver does not need to check the length and bother with partial
2375	 * dumping.
2376	 */
2377	data = vzalloc(tmp.len);
2378	if (!data)
2379		return -ENOMEM;
2380	ret = ops->get_dump_data(dev, &dump, data);
2381	if (ret)
2382		goto out;
2383
2384	/* There are two sane possibilities:
2385	 * 1. The driver's .get_dump_data() does not touch dump.len.
2386	 * 2. Or it may set dump.len to how much it really writes, which
2387	 *    should be tmp.len (or len if it can do a partial dump).
2388	 * In any case respond to userspace with the actual length of data
2389	 * it's receiving.
2390	 */
2391	WARN_ON(dump.len != len && dump.len != tmp.len);
2392	dump.len = len;
2393
2394	if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2395		ret = -EFAULT;
2396		goto out;
2397	}
2398	useraddr += offsetof(struct ethtool_dump, data);
2399	if (copy_to_user(useraddr, data, len))
2400		ret = -EFAULT;
2401out:
2402	vfree(data);
2403	return ret;
2404}
2405
2406static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2407{
2408	struct ethtool_ts_info info;
2409	int err;
2410
2411	err = __ethtool_get_ts_info(dev, &info);
2412	if (err)
2413		return err;
2414
2415	if (copy_to_user(useraddr, &info, sizeof(info)))
2416		return -EFAULT;
2417
2418	return 0;
2419}
2420
2421int ethtool_get_module_info_call(struct net_device *dev,
2422				 struct ethtool_modinfo *modinfo)
2423{
2424	const struct ethtool_ops *ops = dev->ethtool_ops;
2425	struct phy_device *phydev = dev->phydev;
2426
2427	if (dev->sfp_bus)
2428		return sfp_get_module_info(dev->sfp_bus, modinfo);
2429
2430	if (phydev && phydev->drv && phydev->drv->module_info)
2431		return phydev->drv->module_info(phydev, modinfo);
2432
2433	if (ops->get_module_info)
2434		return ops->get_module_info(dev, modinfo);
2435
2436	return -EOPNOTSUPP;
2437}
2438
2439static int ethtool_get_module_info(struct net_device *dev,
2440				   void __user *useraddr)
2441{
2442	int ret;
2443	struct ethtool_modinfo modinfo;
2444
2445	if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2446		return -EFAULT;
2447
2448	ret = ethtool_get_module_info_call(dev, &modinfo);
2449	if (ret)
2450		return ret;
2451
2452	if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2453		return -EFAULT;
2454
2455	return 0;
2456}
2457
2458int ethtool_get_module_eeprom_call(struct net_device *dev,
2459				   struct ethtool_eeprom *ee, u8 *data)
2460{
2461	const struct ethtool_ops *ops = dev->ethtool_ops;
2462	struct phy_device *phydev = dev->phydev;
2463
2464	if (dev->sfp_bus)
2465		return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2466
2467	if (phydev && phydev->drv && phydev->drv->module_eeprom)
2468		return phydev->drv->module_eeprom(phydev, ee, data);
2469
2470	if (ops->get_module_eeprom)
2471		return ops->get_module_eeprom(dev, ee, data);
2472
2473	return -EOPNOTSUPP;
2474}
2475
2476static int ethtool_get_module_eeprom(struct net_device *dev,
2477				     void __user *useraddr)
2478{
2479	int ret;
2480	struct ethtool_modinfo modinfo;
2481
2482	ret = ethtool_get_module_info_call(dev, &modinfo);
2483	if (ret)
2484		return ret;
2485
2486	return ethtool_get_any_eeprom(dev, useraddr,
2487				      ethtool_get_module_eeprom_call,
2488				      modinfo.eeprom_len);
2489}
2490
2491static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2492{
2493	switch (tuna->id) {
2494	case ETHTOOL_RX_COPYBREAK:
2495	case ETHTOOL_TX_COPYBREAK:
2496	case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2497		if (tuna->len != sizeof(u32) ||
2498		    tuna->type_id != ETHTOOL_TUNABLE_U32)
2499			return -EINVAL;
2500		break;
2501	case ETHTOOL_PFC_PREVENTION_TOUT:
2502		if (tuna->len != sizeof(u16) ||
2503		    tuna->type_id != ETHTOOL_TUNABLE_U16)
2504			return -EINVAL;
2505		break;
2506	default:
2507		return -EINVAL;
2508	}
2509
2510	return 0;
2511}
2512
2513static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2514{
2515	int ret;
2516	struct ethtool_tunable tuna;
2517	const struct ethtool_ops *ops = dev->ethtool_ops;
2518	void *data;
2519
2520	if (!ops->get_tunable)
2521		return -EOPNOTSUPP;
2522	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2523		return -EFAULT;
2524	ret = ethtool_tunable_valid(&tuna);
2525	if (ret)
2526		return ret;
2527	data = kzalloc(tuna.len, GFP_USER);
2528	if (!data)
2529		return -ENOMEM;
2530	ret = ops->get_tunable(dev, &tuna, data);
2531	if (ret)
2532		goto out;
2533	useraddr += sizeof(tuna);
2534	ret = -EFAULT;
2535	if (copy_to_user(useraddr, data, tuna.len))
2536		goto out;
2537	ret = 0;
2538
2539out:
2540	kfree(data);
2541	return ret;
2542}
2543
2544static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2545{
2546	int ret;
2547	struct ethtool_tunable tuna;
2548	const struct ethtool_ops *ops = dev->ethtool_ops;
2549	void *data;
2550
2551	if (!ops->set_tunable)
2552		return -EOPNOTSUPP;
2553	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2554		return -EFAULT;
2555	ret = ethtool_tunable_valid(&tuna);
2556	if (ret)
2557		return ret;
2558	useraddr += sizeof(tuna);
2559	data = memdup_user(useraddr, tuna.len);
2560	if (IS_ERR(data))
2561		return PTR_ERR(data);
2562	ret = ops->set_tunable(dev, &tuna, data);
2563
2564	kfree(data);
2565	return ret;
2566}
2567
2568static noinline_for_stack int
2569ethtool_get_per_queue_coalesce(struct net_device *dev,
2570			       void __user *useraddr,
2571			       struct ethtool_per_queue_op *per_queue_opt)
2572{
2573	u32 bit;
2574	int ret;
2575	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2576
2577	if (!dev->ethtool_ops->get_per_queue_coalesce)
2578		return -EOPNOTSUPP;
2579
2580	useraddr += sizeof(*per_queue_opt);
2581
2582	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2583			  MAX_NUM_QUEUE);
2584
2585	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2586		struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2587
2588		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2589		if (ret != 0)
2590			return ret;
2591		if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2592			return -EFAULT;
2593		useraddr += sizeof(coalesce);
2594	}
2595
2596	return 0;
2597}
2598
2599static noinline_for_stack int
2600ethtool_set_per_queue_coalesce(struct net_device *dev,
2601			       void __user *useraddr,
2602			       struct ethtool_per_queue_op *per_queue_opt)
2603{
2604	u32 bit;
2605	int i, ret = 0;
2606	int n_queue;
2607	struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2608	DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2609
2610	if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2611	    (!dev->ethtool_ops->get_per_queue_coalesce))
2612		return -EOPNOTSUPP;
2613
2614	useraddr += sizeof(*per_queue_opt);
2615
2616	bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2617	n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2618	tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2619	if (!backup)
2620		return -ENOMEM;
2621
2622	for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2623		struct ethtool_coalesce coalesce;
2624
2625		ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2626		if (ret != 0)
2627			goto roll_back;
2628
2629		tmp++;
2630
2631		if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2632			ret = -EFAULT;
2633			goto roll_back;
2634		}
2635
2636		if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2637			ret = -EOPNOTSUPP;
2638			goto roll_back;
2639		}
2640
2641		ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2642		if (ret != 0)
2643			goto roll_back;
2644
2645		useraddr += sizeof(coalesce);
2646	}
2647
2648roll_back:
2649	if (ret != 0) {
2650		tmp = backup;
2651		for_each_set_bit(i, queue_mask, bit) {
2652			dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2653			tmp++;
2654		}
2655	}
2656	kfree(backup);
2657
2658	return ret;
2659}
2660
2661static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2662				 void __user *useraddr, u32 sub_cmd)
2663{
2664	struct ethtool_per_queue_op per_queue_opt;
2665
2666	if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2667		return -EFAULT;
2668
2669	if (per_queue_opt.sub_command != sub_cmd)
2670		return -EINVAL;
2671
2672	switch (per_queue_opt.sub_command) {
2673	case ETHTOOL_GCOALESCE:
2674		return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2675	case ETHTOOL_SCOALESCE:
2676		return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2677	default:
2678		return -EOPNOTSUPP;
2679	}
2680}
2681
2682static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2683{
2684	switch (tuna->id) {
2685	case ETHTOOL_PHY_DOWNSHIFT:
2686	case ETHTOOL_PHY_FAST_LINK_DOWN:
2687		if (tuna->len != sizeof(u8) ||
2688		    tuna->type_id != ETHTOOL_TUNABLE_U8)
2689			return -EINVAL;
2690		break;
2691	case ETHTOOL_PHY_EDPD:
2692		if (tuna->len != sizeof(u16) ||
2693		    tuna->type_id != ETHTOOL_TUNABLE_U16)
2694			return -EINVAL;
2695		break;
2696	default:
2697		return -EINVAL;
2698	}
2699
2700	return 0;
2701}
2702
2703static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2704{
2705	struct phy_device *phydev = dev->phydev;
2706	struct ethtool_tunable tuna;
2707	bool phy_drv_tunable;
2708	void *data;
2709	int ret;
2710
2711	phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2712	if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2713		return -EOPNOTSUPP;
2714	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2715		return -EFAULT;
2716	ret = ethtool_phy_tunable_valid(&tuna);
2717	if (ret)
2718		return ret;
2719	data = kzalloc(tuna.len, GFP_USER);
2720	if (!data)
2721		return -ENOMEM;
2722	if (phy_drv_tunable) {
2723		mutex_lock(&phydev->lock);
2724		ret = phydev->drv->get_tunable(phydev, &tuna, data);
2725		mutex_unlock(&phydev->lock);
2726	} else {
2727		ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2728	}
2729	if (ret)
2730		goto out;
2731	useraddr += sizeof(tuna);
2732	ret = -EFAULT;
2733	if (copy_to_user(useraddr, data, tuna.len))
2734		goto out;
2735	ret = 0;
2736
2737out:
2738	kfree(data);
2739	return ret;
2740}
2741
2742static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2743{
2744	struct phy_device *phydev = dev->phydev;
2745	struct ethtool_tunable tuna;
2746	bool phy_drv_tunable;
2747	void *data;
2748	int ret;
2749
2750	phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2751	if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2752		return -EOPNOTSUPP;
2753	if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2754		return -EFAULT;
2755	ret = ethtool_phy_tunable_valid(&tuna);
2756	if (ret)
2757		return ret;
2758	useraddr += sizeof(tuna);
2759	data = memdup_user(useraddr, tuna.len);
2760	if (IS_ERR(data))
2761		return PTR_ERR(data);
2762	if (phy_drv_tunable) {
2763		mutex_lock(&phydev->lock);
2764		ret = phydev->drv->set_tunable(phydev, &tuna, data);
2765		mutex_unlock(&phydev->lock);
2766	} else {
2767		ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2768	}
2769
2770	kfree(data);
2771	return ret;
2772}
2773
2774static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2775{
2776	struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2777	int rc;
2778
2779	if (!dev->ethtool_ops->get_fecparam)
2780		return -EOPNOTSUPP;
2781
2782	rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2783	if (rc)
2784		return rc;
2785
2786	if (WARN_ON_ONCE(fecparam.reserved))
2787		fecparam.reserved = 0;
2788
2789	if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2790		return -EFAULT;
2791	return 0;
2792}
2793
2794static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2795{
2796	struct ethtool_fecparam fecparam;
2797
2798	if (!dev->ethtool_ops->set_fecparam)
2799		return -EOPNOTSUPP;
2800
2801	if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2802		return -EFAULT;
2803
2804	if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2805		return -EINVAL;
2806
2807	fecparam.active_fec = 0;
2808	fecparam.reserved = 0;
2809
2810	return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2811}
2812
2813/* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2814
2815static int
2816__dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2817	      u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2818{
2819	struct net_device *dev;
2820	u32 sub_cmd;
2821	int rc;
2822	netdev_features_t old_features;
2823
2824	dev = __dev_get_by_name(net, ifr->ifr_name);
2825	if (!dev)
2826		return -ENODEV;
2827
2828	if (ethcmd == ETHTOOL_PERQUEUE) {
2829		if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2830			return -EFAULT;
2831	} else {
2832		sub_cmd = ethcmd;
2833	}
2834	/* Allow some commands to be done by anyone */
2835	switch (sub_cmd) {
2836	case ETHTOOL_GSET:
2837	case ETHTOOL_GDRVINFO:
2838	case ETHTOOL_GMSGLVL:
2839	case ETHTOOL_GLINK:
2840	case ETHTOOL_GCOALESCE:
2841	case ETHTOOL_GRINGPARAM:
2842	case ETHTOOL_GPAUSEPARAM:
2843	case ETHTOOL_GRXCSUM:
2844	case ETHTOOL_GTXCSUM:
2845	case ETHTOOL_GSG:
2846	case ETHTOOL_GSSET_INFO:
2847	case ETHTOOL_GSTRINGS:
2848	case ETHTOOL_GSTATS:
2849	case ETHTOOL_GPHYSTATS:
2850	case ETHTOOL_GTSO:
2851	case ETHTOOL_GPERMADDR:
2852	case ETHTOOL_GUFO:
2853	case ETHTOOL_GGSO:
2854	case ETHTOOL_GGRO:
2855	case ETHTOOL_GFLAGS:
2856	case ETHTOOL_GPFLAGS:
2857	case ETHTOOL_GRXFH:
2858	case ETHTOOL_GRXRINGS:
2859	case ETHTOOL_GRXCLSRLCNT:
2860	case ETHTOOL_GRXCLSRULE:
2861	case ETHTOOL_GRXCLSRLALL:
2862	case ETHTOOL_GRXFHINDIR:
2863	case ETHTOOL_GRSSH:
2864	case ETHTOOL_GFEATURES:
2865	case ETHTOOL_GCHANNELS:
2866	case ETHTOOL_GET_TS_INFO:
2867	case ETHTOOL_GEEE:
2868	case ETHTOOL_GTUNABLE:
2869	case ETHTOOL_PHY_GTUNABLE:
2870	case ETHTOOL_GLINKSETTINGS:
2871	case ETHTOOL_GFECPARAM:
2872		break;
2873	default:
2874		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2875			return -EPERM;
2876	}
2877
2878	if (dev->dev.parent)
2879		pm_runtime_get_sync(dev->dev.parent);
2880
2881	if (!netif_device_present(dev)) {
2882		rc = -ENODEV;
2883		goto out;
2884	}
2885
2886	if (dev->ethtool_ops->begin) {
2887		rc = dev->ethtool_ops->begin(dev);
2888		if (rc < 0)
2889			goto out;
2890	}
2891	old_features = dev->features;
2892
2893	switch (ethcmd) {
2894	case ETHTOOL_GSET:
2895		rc = ethtool_get_settings(dev, useraddr);
2896		break;
2897	case ETHTOOL_SSET:
2898		rc = ethtool_set_settings(dev, useraddr);
2899		break;
2900	case ETHTOOL_GDRVINFO:
2901		rc = ethtool_get_drvinfo(dev, devlink_state);
2902		break;
2903	case ETHTOOL_GREGS:
2904		rc = ethtool_get_regs(dev, useraddr);
2905		break;
2906	case ETHTOOL_GWOL:
2907		rc = ethtool_get_wol(dev, useraddr);
2908		break;
2909	case ETHTOOL_SWOL:
2910		rc = ethtool_set_wol(dev, useraddr);
2911		break;
2912	case ETHTOOL_GMSGLVL:
2913		rc = ethtool_get_value(dev, useraddr, ethcmd,
2914				       dev->ethtool_ops->get_msglevel);
2915		break;
2916	case ETHTOOL_SMSGLVL:
2917		rc = ethtool_set_value_void(dev, useraddr,
2918				       dev->ethtool_ops->set_msglevel);
2919		if (!rc)
2920			ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2921		break;
2922	case ETHTOOL_GEEE:
2923		rc = ethtool_get_eee(dev, useraddr);
2924		break;
2925	case ETHTOOL_SEEE:
2926		rc = ethtool_set_eee(dev, useraddr);
2927		break;
2928	case ETHTOOL_NWAY_RST:
2929		rc = ethtool_nway_reset(dev);
2930		break;
2931	case ETHTOOL_GLINK:
2932		rc = ethtool_get_link(dev, useraddr);
2933		break;
2934	case ETHTOOL_GEEPROM:
2935		rc = ethtool_get_eeprom(dev, useraddr);
2936		break;
2937	case ETHTOOL_SEEPROM:
2938		rc = ethtool_set_eeprom(dev, useraddr);
2939		break;
2940	case ETHTOOL_GCOALESCE:
2941		rc = ethtool_get_coalesce(dev, useraddr);
2942		break;
2943	case ETHTOOL_SCOALESCE:
2944		rc = ethtool_set_coalesce(dev, useraddr);
2945		break;
2946	case ETHTOOL_GRINGPARAM:
2947		rc = ethtool_get_ringparam(dev, useraddr);
2948		break;
2949	case ETHTOOL_SRINGPARAM:
2950		rc = ethtool_set_ringparam(dev, useraddr);
2951		break;
2952	case ETHTOOL_GPAUSEPARAM:
2953		rc = ethtool_get_pauseparam(dev, useraddr);
2954		break;
2955	case ETHTOOL_SPAUSEPARAM:
2956		rc = ethtool_set_pauseparam(dev, useraddr);
2957		break;
2958	case ETHTOOL_TEST:
2959		rc = ethtool_self_test(dev, useraddr);
2960		break;
2961	case ETHTOOL_GSTRINGS:
2962		rc = ethtool_get_strings(dev, useraddr);
2963		break;
2964	case ETHTOOL_PHYS_ID:
2965		rc = ethtool_phys_id(dev, useraddr);
2966		break;
2967	case ETHTOOL_GSTATS:
2968		rc = ethtool_get_stats(dev, useraddr);
2969		break;
2970	case ETHTOOL_GPERMADDR:
2971		rc = ethtool_get_perm_addr(dev, useraddr);
2972		break;
2973	case ETHTOOL_GFLAGS:
2974		rc = ethtool_get_value(dev, useraddr, ethcmd,
2975					__ethtool_get_flags);
2976		break;
2977	case ETHTOOL_SFLAGS:
2978		rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2979		break;
2980	case ETHTOOL_GPFLAGS:
2981		rc = ethtool_get_value(dev, useraddr, ethcmd,
2982				       dev->ethtool_ops->get_priv_flags);
2983		if (!rc)
2984			ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2985		break;
2986	case ETHTOOL_SPFLAGS:
2987		rc = ethtool_set_value(dev, useraddr,
2988				       dev->ethtool_ops->set_priv_flags);
2989		break;
2990	case ETHTOOL_GRXFH:
2991	case ETHTOOL_GRXRINGS:
2992	case ETHTOOL_GRXCLSRLCNT:
2993	case ETHTOOL_GRXCLSRULE:
2994	case ETHTOOL_GRXCLSRLALL:
2995		rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2996		break;
2997	case ETHTOOL_SRXFH:
2998	case ETHTOOL_SRXCLSRLDEL:
2999	case ETHTOOL_SRXCLSRLINS:
3000		rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
3001		break;
3002	case ETHTOOL_FLASHDEV:
3003		rc = ethtool_flash_device(dev, devlink_state);
3004		break;
3005	case ETHTOOL_RESET:
3006		rc = ethtool_reset(dev, useraddr);
3007		break;
3008	case ETHTOOL_GSSET_INFO:
3009		rc = ethtool_get_sset_info(dev, useraddr);
3010		break;
3011	case ETHTOOL_GRXFHINDIR:
3012		rc = ethtool_get_rxfh_indir(dev, useraddr);
3013		break;
3014	case ETHTOOL_SRXFHINDIR:
3015		rc = ethtool_set_rxfh_indir(dev, useraddr);
3016		break;
3017	case ETHTOOL_GRSSH:
3018		rc = ethtool_get_rxfh(dev, useraddr);
3019		break;
3020	case ETHTOOL_SRSSH:
3021		rc = ethtool_set_rxfh(dev, useraddr);
3022		break;
3023	case ETHTOOL_GFEATURES:
3024		rc = ethtool_get_features(dev, useraddr);
3025		break;
3026	case ETHTOOL_SFEATURES:
3027		rc = ethtool_set_features(dev, useraddr);
3028		break;
3029	case ETHTOOL_GTXCSUM:
3030	case ETHTOOL_GRXCSUM:
3031	case ETHTOOL_GSG:
3032	case ETHTOOL_GTSO:
3033	case ETHTOOL_GGSO:
3034	case ETHTOOL_GGRO:
3035		rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
3036		break;
3037	case ETHTOOL_STXCSUM:
3038	case ETHTOOL_SRXCSUM:
3039	case ETHTOOL_SSG:
3040	case ETHTOOL_STSO:
3041	case ETHTOOL_SGSO:
3042	case ETHTOOL_SGRO:
3043		rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
3044		break;
3045	case ETHTOOL_GCHANNELS:
3046		rc = ethtool_get_channels(dev, useraddr);
3047		break;
3048	case ETHTOOL_SCHANNELS:
3049		rc = ethtool_set_channels(dev, useraddr);
3050		break;
3051	case ETHTOOL_SET_DUMP:
3052		rc = ethtool_set_dump(dev, useraddr);
3053		break;
3054	case ETHTOOL_GET_DUMP_FLAG:
3055		rc = ethtool_get_dump_flag(dev, useraddr);
3056		break;
3057	case ETHTOOL_GET_DUMP_DATA:
3058		rc = ethtool_get_dump_data(dev, useraddr);
3059		break;
3060	case ETHTOOL_GET_TS_INFO:
3061		rc = ethtool_get_ts_info(dev, useraddr);
3062		break;
3063	case ETHTOOL_GMODULEINFO:
3064		rc = ethtool_get_module_info(dev, useraddr);
3065		break;
3066	case ETHTOOL_GMODULEEEPROM:
3067		rc = ethtool_get_module_eeprom(dev, useraddr);
3068		break;
3069	case ETHTOOL_GTUNABLE:
3070		rc = ethtool_get_tunable(dev, useraddr);
3071		break;
3072	case ETHTOOL_STUNABLE:
3073		rc = ethtool_set_tunable(dev, useraddr);
3074		break;
3075	case ETHTOOL_GPHYSTATS:
3076		rc = ethtool_get_phy_stats(dev, useraddr);
3077		break;
3078	case ETHTOOL_PERQUEUE:
3079		rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3080		break;
3081	case ETHTOOL_GLINKSETTINGS:
3082		rc = ethtool_get_link_ksettings(dev, useraddr);
3083		break;
3084	case ETHTOOL_SLINKSETTINGS:
3085		rc = ethtool_set_link_ksettings(dev, useraddr);
3086		break;
3087	case ETHTOOL_PHY_GTUNABLE:
3088		rc = get_phy_tunable(dev, useraddr);
3089		break;
3090	case ETHTOOL_PHY_STUNABLE:
3091		rc = set_phy_tunable(dev, useraddr);
3092		break;
3093	case ETHTOOL_GFECPARAM:
3094		rc = ethtool_get_fecparam(dev, useraddr);
3095		break;
3096	case ETHTOOL_SFECPARAM:
3097		rc = ethtool_set_fecparam(dev, useraddr);
3098		break;
3099	default:
3100		rc = -EOPNOTSUPP;
3101	}
3102
3103	if (dev->ethtool_ops->complete)
3104		dev->ethtool_ops->complete(dev);
3105
3106	if (old_features != dev->features)
3107		netdev_features_change(dev);
3108out:
3109	if (dev->dev.parent)
3110		pm_runtime_put(dev->dev.parent);
3111
3112	return rc;
3113}
3114
3115int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3116{
3117	struct ethtool_devlink_compat *state;
3118	u32 ethcmd;
3119	int rc;
3120
3121	if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3122		return -EFAULT;
3123
3124	state = kzalloc(sizeof(*state), GFP_KERNEL);
3125	if (!state)
3126		return -ENOMEM;
3127
3128	switch (ethcmd) {
3129	case ETHTOOL_FLASHDEV:
3130		if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3131			rc = -EFAULT;
3132			goto exit_free;
3133		}
3134		state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3135		break;
3136	}
3137
3138	rtnl_lock();
3139	rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3140	rtnl_unlock();
3141	if (rc)
3142		goto exit_free;
3143
3144	switch (ethcmd) {
3145	case ETHTOOL_FLASHDEV:
3146		if (state->devlink)
3147			rc = devlink_compat_flash_update(state->devlink,
3148							 state->efl.data);
3149		break;
3150	case ETHTOOL_GDRVINFO:
3151		if (state->devlink)
3152			devlink_compat_running_version(state->devlink,
3153						       state->info.fw_version,
3154						       sizeof(state->info.fw_version));
3155		if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3156			rc = -EFAULT;
3157			goto exit_free;
3158		}
3159		break;
3160	}
3161
3162exit_free:
3163	if (state->devlink)
3164		devlink_put(state->devlink);
3165	kfree(state);
3166	return rc;
3167}
3168
3169struct ethtool_rx_flow_key {
3170	struct flow_dissector_key_basic			basic;
3171	union {
3172		struct flow_dissector_key_ipv4_addrs	ipv4;
3173		struct flow_dissector_key_ipv6_addrs	ipv6;
3174	};
3175	struct flow_dissector_key_ports			tp;
3176	struct flow_dissector_key_ip			ip;
3177	struct flow_dissector_key_vlan			vlan;
3178	struct flow_dissector_key_eth_addrs		eth_addrs;
3179} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3180
3181struct ethtool_rx_flow_match {
3182	struct flow_dissector		dissector;
3183	struct ethtool_rx_flow_key	key;
3184	struct ethtool_rx_flow_key	mask;
3185};
3186
3187struct ethtool_rx_flow_rule *
3188ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3189{
3190	const struct ethtool_rx_flow_spec *fs = input->fs;
3191	struct ethtool_rx_flow_match *match;
3192	struct ethtool_rx_flow_rule *flow;
3193	struct flow_action_entry *act;
3194
3195	flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3196		       sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3197	if (!flow)
3198		return ERR_PTR(-ENOMEM);
3199
3200	/* ethtool_rx supports only one single action per rule. */
3201	flow->rule = flow_rule_alloc(1);
3202	if (!flow->rule) {
3203		kfree(flow);
3204		return ERR_PTR(-ENOMEM);
3205	}
3206
3207	match = (struct ethtool_rx_flow_match *)flow->priv;
3208	flow->rule->match.dissector	= &match->dissector;
3209	flow->rule->match.mask		= &match->mask;
3210	flow->rule->match.key		= &match->key;
3211
3212	match->mask.basic.n_proto = htons(0xffff);
3213
3214	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3215	case ETHER_FLOW: {
3216		const struct ethhdr *ether_spec, *ether_m_spec;
3217
3218		ether_spec = &fs->h_u.ether_spec;
3219		ether_m_spec = &fs->m_u.ether_spec;
3220
3221		if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3222			ether_addr_copy(match->key.eth_addrs.src,
3223					ether_spec->h_source);
3224			ether_addr_copy(match->mask.eth_addrs.src,
3225					ether_m_spec->h_source);
3226		}
3227		if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3228			ether_addr_copy(match->key.eth_addrs.dst,
3229					ether_spec->h_dest);
3230			ether_addr_copy(match->mask.eth_addrs.dst,
3231					ether_m_spec->h_dest);
3232		}
3233		if (ether_m_spec->h_proto) {
3234			match->key.basic.n_proto = ether_spec->h_proto;
3235			match->mask.basic.n_proto = ether_m_spec->h_proto;
3236		}
3237		}
3238		break;
3239	case TCP_V4_FLOW:
3240	case UDP_V4_FLOW: {
3241		const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3242
3243		match->key.basic.n_proto = htons(ETH_P_IP);
3244
3245		v4_spec = &fs->h_u.tcp_ip4_spec;
3246		v4_m_spec = &fs->m_u.tcp_ip4_spec;
3247
3248		if (v4_m_spec->ip4src) {
3249			match->key.ipv4.src = v4_spec->ip4src;
3250			match->mask.ipv4.src = v4_m_spec->ip4src;
3251		}
3252		if (v4_m_spec->ip4dst) {
3253			match->key.ipv4.dst = v4_spec->ip4dst;
3254			match->mask.ipv4.dst = v4_m_spec->ip4dst;
3255		}
3256		if (v4_m_spec->ip4src ||
3257		    v4_m_spec->ip4dst) {
3258			match->dissector.used_keys |=
3259				BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3260			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3261				offsetof(struct ethtool_rx_flow_key, ipv4);
3262		}
3263		if (v4_m_spec->psrc) {
3264			match->key.tp.src = v4_spec->psrc;
3265			match->mask.tp.src = v4_m_spec->psrc;
3266		}
3267		if (v4_m_spec->pdst) {
3268			match->key.tp.dst = v4_spec->pdst;
3269			match->mask.tp.dst = v4_m_spec->pdst;
3270		}
3271		if (v4_m_spec->psrc ||
3272		    v4_m_spec->pdst) {
3273			match->dissector.used_keys |=
3274				BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3275			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3276				offsetof(struct ethtool_rx_flow_key, tp);
3277		}
3278		if (v4_m_spec->tos) {
3279			match->key.ip.tos = v4_spec->tos;
3280			match->mask.ip.tos = v4_m_spec->tos;
3281			match->dissector.used_keys |=
3282				BIT(FLOW_DISSECTOR_KEY_IP);
3283			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3284				offsetof(struct ethtool_rx_flow_key, ip);
3285		}
3286		}
3287		break;
3288	case TCP_V6_FLOW:
3289	case UDP_V6_FLOW: {
3290		const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3291
3292		match->key.basic.n_proto = htons(ETH_P_IPV6);
3293
3294		v6_spec = &fs->h_u.tcp_ip6_spec;
3295		v6_m_spec = &fs->m_u.tcp_ip6_spec;
3296		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3297			memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3298			       sizeof(match->key.ipv6.src));
3299			memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3300			       sizeof(match->mask.ipv6.src));
3301		}
3302		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3303			memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3304			       sizeof(match->key.ipv6.dst));
3305			memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3306			       sizeof(match->mask.ipv6.dst));
3307		}
3308		if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3309		    !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3310			match->dissector.used_keys |=
3311				BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3312			match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3313				offsetof(struct ethtool_rx_flow_key, ipv6);
3314		}
3315		if (v6_m_spec->psrc) {
3316			match->key.tp.src = v6_spec->psrc;
3317			match->mask.tp.src = v6_m_spec->psrc;
3318		}
3319		if (v6_m_spec->pdst) {
3320			match->key.tp.dst = v6_spec->pdst;
3321			match->mask.tp.dst = v6_m_spec->pdst;
3322		}
3323		if (v6_m_spec->psrc ||
3324		    v6_m_spec->pdst) {
3325			match->dissector.used_keys |=
3326				BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3327			match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3328				offsetof(struct ethtool_rx_flow_key, tp);
3329		}
3330		if (v6_m_spec->tclass) {
3331			match->key.ip.tos = v6_spec->tclass;
3332			match->mask.ip.tos = v6_m_spec->tclass;
3333			match->dissector.used_keys |=
3334				BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3335			match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3336				offsetof(struct ethtool_rx_flow_key, ip);
3337		}
3338		}
3339		break;
3340	default:
3341		ethtool_rx_flow_rule_destroy(flow);
3342		return ERR_PTR(-EINVAL);
3343	}
3344
3345	switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3346	case TCP_V4_FLOW:
3347	case TCP_V6_FLOW:
3348		match->key.basic.ip_proto = IPPROTO_TCP;
3349		match->mask.basic.ip_proto = 0xff;
3350		break;
3351	case UDP_V4_FLOW:
3352	case UDP_V6_FLOW:
3353		match->key.basic.ip_proto = IPPROTO_UDP;
3354		match->mask.basic.ip_proto = 0xff;
3355		break;
3356	}
3357
3358	match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3359	match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3360		offsetof(struct ethtool_rx_flow_key, basic);
3361
3362	if (fs->flow_type & FLOW_EXT) {
3363		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3364		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3365
3366		if (ext_m_spec->vlan_etype) {
3367			match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3368			match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3369		}
3370
3371		if (ext_m_spec->vlan_tci) {
3372			match->key.vlan.vlan_id =
3373				ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3374			match->mask.vlan.vlan_id =
3375				ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3376
3377			match->key.vlan.vlan_dei =
3378				!!(ext_h_spec->vlan_tci & htons(0x1000));
3379			match->mask.vlan.vlan_dei =
3380				!!(ext_m_spec->vlan_tci & htons(0x1000));
3381
3382			match->key.vlan.vlan_priority =
3383				(ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3384			match->mask.vlan.vlan_priority =
3385				(ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3386		}
3387
3388		if (ext_m_spec->vlan_etype ||
3389		    ext_m_spec->vlan_tci) {
3390			match->dissector.used_keys |=
3391				BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3392			match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3393				offsetof(struct ethtool_rx_flow_key, vlan);
3394		}
3395	}
3396	if (fs->flow_type & FLOW_MAC_EXT) {
3397		const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3398		const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3399
3400		memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3401		       ETH_ALEN);
3402		memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3403		       ETH_ALEN);
3404
3405		match->dissector.used_keys |=
3406			BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3407		match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3408			offsetof(struct ethtool_rx_flow_key, eth_addrs);
3409	}
3410
3411	act = &flow->rule->action.entries[0];
3412	switch (fs->ring_cookie) {
3413	case RX_CLS_FLOW_DISC:
3414		act->id = FLOW_ACTION_DROP;
3415		break;
3416	case RX_CLS_FLOW_WAKE:
3417		act->id = FLOW_ACTION_WAKE;
3418		break;
3419	default:
3420		act->id = FLOW_ACTION_QUEUE;
3421		if (fs->flow_type & FLOW_RSS)
3422			act->queue.ctx = input->rss_ctx;
3423
3424		act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3425		act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3426		break;
3427	}
3428
3429	return flow;
3430}
3431EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3432
3433void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3434{
3435	kfree(flow->rule);
3436	kfree(flow);
3437}
3438EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);