net/core/ethtool.c

   1 /*
   2  * net/core/ethtool.c - Ethtool ioctl handler
   3  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   4  *
   5  * This file is where we call all the ethtool_ops commands to get
   6  * the information ethtool needs.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/capability.h>
  17 #include <linux/errno.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/net_tstamp.h>
  21 #include <linux/phy.h>
  22 #include <linux/bitops.h>
  23 #include <linux/uaccess.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/slab.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/sched.h>
  28 #include <linux/net.h>
  29
  30 /*
  31  * Some useful ethtool_ops methods that're device independent.
  32  * If we find that all drivers want to do the same thing here,
  33  * we can turn these into dev_() function calls.
  34  */
  35
  36 u32 ethtool_op_get_link(struct net_device *dev)
  37 {
  38         return netif_carrier_ok(dev) ? 1 : 0;
  39 }
  40 EXPORT_SYMBOL(ethtool_op_get_link);
  41
  42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  43 {
  44         info->so_timestamping =
  45                 SOF_TIMESTAMPING_TX_SOFTWARE |
  46                 SOF_TIMESTAMPING_RX_SOFTWARE |
  47                 SOF_TIMESTAMPING_SOFTWARE;
  48         info->phc_index = -1;
  49         return 0;
  50 }
  51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  52
  53 /* Handlers for each ethtool command */
  54
  55 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
  56
  57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
  58         [NETIF_F_SG_BIT] =               "tx-scatter-gather",
  59         [NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
  60         [NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
  61         [NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
  62         [NETIF_F_HIGHDMA_BIT] =          "highdma",
  63         [NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
  64         [NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
  65
  66         [NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
  67         [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
  68         [NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
  69         [NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
  70         [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
  71         [NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
  72         [NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
  73         [NETIF_F_LLTX_BIT] =             "tx-lockless",
  74         [NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
  75         [NETIF_F_GRO_BIT] =              "rx-gro",
  76         [NETIF_F_LRO_BIT] =              "rx-lro",
  77
  78         [NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
  79         [NETIF_F_UFO_BIT] =              "tx-udp-fragmentation",
  80         [NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
  81         [NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
  82         [NETIF_F_TSO_MANGLEID_BIT] =     "tx-tcp-mangleid-segmentation",
  83         [NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
  84         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
  85         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
  86         [NETIF_F_GSO_GRE_CSUM_BIT] =     "tx-gre-csum-segmentation",
  87         [NETIF_F_GSO_IPXIP4_BIT] =       "tx-ipxip4-segmentation",
  88         [NETIF_F_GSO_IPXIP6_BIT] =       "tx-ipxip6-segmentation",
  89         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
  90         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
  91         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
  92
  93         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
  94         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
  95         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
  96         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
  97         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
  98         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
  99         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
 100         [NETIF_F_LOOPBACK_BIT] =         "loopback",
 101         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
 102         [NETIF_F_RXALL_BIT] =            "rx-all",
 103         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
 104         [NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
 105         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
 106 };
 107
 108 static const char
 109 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
 110         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
 111         [ETH_RSS_HASH_XOR_BIT] =        "xor",
 112 };
 113
 114 static const char
 115 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 116         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 117         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
 118         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
 119 };
 120
 121 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 122 {
 123         struct ethtool_gfeatures cmd = {
 124                 .cmd = ETHTOOL_GFEATURES,
 125                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 126         };
 127         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 128         u32 __user *sizeaddr;
 129         u32 copy_size;
 130         int i;
 131
 132         /* in case feature bits run out again */
 133         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
 134
 135         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 136                 features[i].available = (u32)(dev->hw_features >> (32 * i));
 137                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 138                 features[i].active = (u32)(dev->features >> (32 * i));
 139                 features[i].never_changed =
 140                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 141         }
 142
 143         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 144         if (get_user(copy_size, sizeaddr))
 145                 return -EFAULT;
 146
 147         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 148                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 149
 150         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 151                 return -EFAULT;
 152         useraddr += sizeof(cmd);
 153         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 154                 return -EFAULT;
 155
 156         return 0;
 157 }
 158
 159 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 160 {
 161         struct ethtool_sfeatures cmd;
 162         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 163         netdev_features_t wanted = 0, valid = 0;
 164         int i, ret = 0;
 165
 166         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 167                 return -EFAULT;
 168         useraddr += sizeof(cmd);
 169
 170         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 171                 return -EINVAL;
 172
 173         if (copy_from_user(features, useraddr, sizeof(features)))
 174                 return -EFAULT;
 175
 176         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 177                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 178                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 179         }
 180
 181         if (valid & ~NETIF_F_ETHTOOL_BITS)
 182                 return -EINVAL;
 183
 184         if (valid & ~dev->hw_features) {
 185                 valid &= dev->hw_features;
 186                 ret |= ETHTOOL_F_UNSUPPORTED;
 187         }
 188
 189         dev->wanted_features &= ~valid;
 190         dev->wanted_features |= wanted & valid;
 191         __netdev_update_features(dev);
 192
 193         if ((dev->wanted_features ^ dev->features) & valid)
 194                 ret |= ETHTOOL_F_WISH;
 195
 196         return ret;
 197 }
 198
 199 static int phy_get_sset_count(struct phy_device *phydev)
 200 {
 201         int ret;
 202
 203         if (phydev->drv->get_sset_count &&
 204             phydev->drv->get_strings &&
 205             phydev->drv->get_stats) {
 206                 mutex_lock(&phydev->lock);
 207                 ret = phydev->drv->get_sset_count(phydev);
 208                 mutex_unlock(&phydev->lock);
 209
 210                 return ret;
 211         }
 212
 213         return -EOPNOTSUPP;
 214 }
 215
 216 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 217 {
 218         const struct ethtool_ops *ops = dev->ethtool_ops;
 219
 220         if (sset == ETH_SS_FEATURES)
 221                 return ARRAY_SIZE(netdev_features_strings);
 222
 223         if (sset == ETH_SS_RSS_HASH_FUNCS)
 224                 return ARRAY_SIZE(rss_hash_func_strings);
 225
 226         if (sset == ETH_SS_TUNABLES)
 227                 return ARRAY_SIZE(tunable_strings);
 228
 229         if (sset == ETH_SS_PHY_STATS) {
 230                 if (dev->phydev)
 231                         return phy_get_sset_count(dev->phydev);
 232                 else
 233                         return -EOPNOTSUPP;
 234         }
 235
 236         if (ops->get_sset_count && ops->get_strings)
 237                 return ops->get_sset_count(dev, sset);
 238         else
 239                 return -EOPNOTSUPP;
 240 }
 241
 242 static void __ethtool_get_strings(struct net_device *dev,
 243         u32 stringset, u8 *data)
 244 {
 245         const struct ethtool_ops *ops = dev->ethtool_ops;
 246
 247         if (stringset == ETH_SS_FEATURES)
 248                 memcpy(data, netdev_features_strings,
 249                         sizeof(netdev_features_strings));
 250         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 251                 memcpy(data, rss_hash_func_strings,
 252                        sizeof(rss_hash_func_strings));
 253         else if (stringset == ETH_SS_TUNABLES)
 254                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 255         else if (stringset == ETH_SS_PHY_STATS) {
 256                 struct phy_device *phydev = dev->phydev;
 257
 258                 if (phydev) {
 259                         mutex_lock(&phydev->lock);
 260                         phydev->drv->get_strings(phydev, data);
 261                         mutex_unlock(&phydev->lock);
 262                 } else {
 263                         return;
 264                 }
 265         } else
 266                 /* ops->get_strings is valid because checked earlier */
 267                 ops->get_strings(dev, stringset, data);
 268 }
 269
 270 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 271 {
 272         /* feature masks of legacy discrete ethtool ops */
 273
 274         switch (eth_cmd) {
 275         case ETHTOOL_GTXCSUM:
 276         case ETHTOOL_STXCSUM:
 277                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 278         case ETHTOOL_GRXCSUM:
 279         case ETHTOOL_SRXCSUM:
 280                 return NETIF_F_RXCSUM;
 281         case ETHTOOL_GSG:
 282         case ETHTOOL_SSG:
 283                 return NETIF_F_SG;
 284         case ETHTOOL_GTSO:
 285         case ETHTOOL_STSO:
 286                 return NETIF_F_ALL_TSO;
 287         case ETHTOOL_GUFO:
 288         case ETHTOOL_SUFO:
 289                 return NETIF_F_UFO;
 290         case ETHTOOL_GGSO:
 291         case ETHTOOL_SGSO:
 292                 return NETIF_F_GSO;
 293         case ETHTOOL_GGRO:
 294         case ETHTOOL_SGRO:
 295                 return NETIF_F_GRO;
 296         default:
 297                 BUG();
 298         }
 299 }
 300
 301 static int ethtool_get_one_feature(struct net_device *dev,
 302         char __user *useraddr, u32 ethcmd)
 303 {
 304         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 305         struct ethtool_value edata = {
 306                 .cmd = ethcmd,
 307                 .data = !!(dev->features & mask),
 308         };
 309
 310         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 311                 return -EFAULT;
 312         return 0;
 313 }
 314
 315 static int ethtool_set_one_feature(struct net_device *dev,
 316         void __user *useraddr, u32 ethcmd)
 317 {
 318         struct ethtool_value edata;
 319         netdev_features_t mask;
 320
 321         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 322                 return -EFAULT;
 323
 324         mask = ethtool_get_feature_mask(ethcmd);
 325         mask &= dev->hw_features;
 326         if (!mask)
 327                 return -EOPNOTSUPP;
 328
 329         if (edata.data)
 330                 dev->wanted_features |= mask;
 331         else
 332                 dev->wanted_features &= ~mask;
 333
 334         __netdev_update_features(dev);
 335
 336         return 0;
 337 }
 338
 339 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 340                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 341 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 342                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 343                           NETIF_F_RXHASH)
 344
 345 static u32 __ethtool_get_flags(struct net_device *dev)
 346 {
 347         u32 flags = 0;
 348
 349         if (dev->features & NETIF_F_LRO)
 350                 flags |= ETH_FLAG_LRO;
 351         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 352                 flags |= ETH_FLAG_RXVLAN;
 353         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 354                 flags |= ETH_FLAG_TXVLAN;
 355         if (dev->features & NETIF_F_NTUPLE)
 356                 flags |= ETH_FLAG_NTUPLE;
 357         if (dev->features & NETIF_F_RXHASH)
 358                 flags |= ETH_FLAG_RXHASH;
 359
 360         return flags;
 361 }
 362
 363 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 364 {
 365         netdev_features_t features = 0, changed;
 366
 367         if (data & ~ETH_ALL_FLAGS)
 368                 return -EINVAL;
 369
 370         if (data & ETH_FLAG_LRO)
 371                 features |= NETIF_F_LRO;
 372         if (data & ETH_FLAG_RXVLAN)
 373                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 374         if (data & ETH_FLAG_TXVLAN)
 375                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 376         if (data & ETH_FLAG_NTUPLE)
 377                 features |= NETIF_F_NTUPLE;
 378         if (data & ETH_FLAG_RXHASH)
 379                 features |= NETIF_F_RXHASH;
 380
 381         /* allow changing only bits set in hw_features */
 382         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 383         if (changed & ~dev->hw_features)
 384                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 385
 386         dev->wanted_features =
 387                 (dev->wanted_features & ~changed) | (features & changed);
 388
 389         __netdev_update_features(dev);
 390
 391         return 0;
 392 }
 393
 394 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 395                                              u32 legacy_u32)
 396 {
 397         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 398         dst[0] = legacy_u32;
 399 }
 400 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 401
 402 /* return false if src had higher bits set. lower bits always updated. */
 403 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 404                                              const unsigned long *src)
 405 {
 406         bool retval = true;
 407
 408         /* TODO: following test will soon always be true */
 409         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 410                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 411
 412                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 413                 bitmap_fill(ext, 32);
 414                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 415                 if (bitmap_intersects(ext, src,
 416                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 417                         /* src mask goes beyond bit 31 */
 418                         retval = false;
 419                 }
 420         }
 421         *legacy_u32 = src[0];
 422         return retval;
 423 }
 424 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 425
 426 /* return false if legacy contained non-0 deprecated fields
 427  * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
 428  */
 429 static bool
 430 convert_legacy_settings_to_link_ksettings(
 431         struct ethtool_link_ksettings *link_ksettings,
 432         const struct ethtool_cmd *legacy_settings)
 433 {
 434         bool retval = true;
 435
 436         memset(link_ksettings, 0, sizeof(*link_ksettings));
 437
 438         /* This is used to tell users that driver is still using these
 439          * deprecated legacy fields, and they should not use
 440          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
 441          */
 442         if (legacy_settings->transceiver ||
 443             legacy_settings->maxtxpkt ||
 444             legacy_settings->maxrxpkt)
 445                 retval = false;
 446
 447         ethtool_convert_legacy_u32_to_link_mode(
 448                 link_ksettings->link_modes.supported,
 449                 legacy_settings->supported);
 450         ethtool_convert_legacy_u32_to_link_mode(
 451                 link_ksettings->link_modes.advertising,
 452                 legacy_settings->advertising);
 453         ethtool_convert_legacy_u32_to_link_mode(
 454                 link_ksettings->link_modes.lp_advertising,
 455                 legacy_settings->lp_advertising);
 456         link_ksettings->base.speed
 457                 = ethtool_cmd_speed(legacy_settings);
 458         link_ksettings->base.duplex
 459                 = legacy_settings->duplex;
 460         link_ksettings->base.port
 461                 = legacy_settings->port;
 462         link_ksettings->base.phy_address
 463                 = legacy_settings->phy_address;
 464         link_ksettings->base.autoneg
 465                 = legacy_settings->autoneg;
 466         link_ksettings->base.mdio_support
 467                 = legacy_settings->mdio_support;
 468         link_ksettings->base.eth_tp_mdix
 469                 = legacy_settings->eth_tp_mdix;
 470         link_ksettings->base.eth_tp_mdix_ctrl
 471                 = legacy_settings->eth_tp_mdix_ctrl;
 472         return retval;
 473 }
 474
 475 /* return false if ksettings link modes had higher bits
 476  * set. legacy_settings always updated (best effort)
 477  */
 478 static bool
 479 convert_link_ksettings_to_legacy_settings(
 480         struct ethtool_cmd *legacy_settings,
 481         const struct ethtool_link_ksettings *link_ksettings)
 482 {
 483         bool retval = true;
 484
 485         memset(legacy_settings, 0, sizeof(*legacy_settings));
 486         /* this also clears the deprecated fields in legacy structure:
 487          * __u8         transceiver;
 488          * __u32        maxtxpkt;
 489          * __u32        maxrxpkt;
 490          */
 491
 492         retval &= ethtool_convert_link_mode_to_legacy_u32(
 493                 &legacy_settings->supported,
 494                 link_ksettings->link_modes.supported);
 495         retval &= ethtool_convert_link_mode_to_legacy_u32(
 496                 &legacy_settings->advertising,
 497                 link_ksettings->link_modes.advertising);
 498         retval &= ethtool_convert_link_mode_to_legacy_u32(
 499                 &legacy_settings->lp_advertising,
 500                 link_ksettings->link_modes.lp_advertising);
 501         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 502         legacy_settings->duplex
 503                 = link_ksettings->base.duplex;
 504         legacy_settings->port
 505                 = link_ksettings->base.port;
 506         legacy_settings->phy_address
 507                 = link_ksettings->base.phy_address;
 508         legacy_settings->autoneg
 509                 = link_ksettings->base.autoneg;
 510         legacy_settings->mdio_support
 511                 = link_ksettings->base.mdio_support;
 512         legacy_settings->eth_tp_mdix
 513                 = link_ksettings->base.eth_tp_mdix;
 514         legacy_settings->eth_tp_mdix_ctrl
 515                 = link_ksettings->base.eth_tp_mdix_ctrl;
 516         return retval;
 517 }
 518
 519 /* number of 32-bit words to store the user's link mode bitmaps */
 520 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 521         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 522
 523 /* layout of the struct passed from/to userland */
 524 struct ethtool_link_usettings {
 525         struct ethtool_link_settings base;
 526         struct {
 527                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 528                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 529                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 530         } link_modes;
 531 };
 532
 533 /* Internal kernel helper to query a device ethtool_link_settings.
 534  *
 535  * Backward compatibility note: for compatibility with legacy drivers
 536  * that implement only the ethtool_cmd API, this has to work with both
 537  * drivers implementing get_link_ksettings API and drivers
 538  * implementing get_settings API. When drivers implement get_settings
 539  * and report ethtool_cmd deprecated fields
 540  * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
 541  * because the resulting struct ethtool_link_settings does not report them.
 542  */
 543 int __ethtool_get_link_ksettings(struct net_device *dev,
 544                                  struct ethtool_link_ksettings *link_ksettings)
 545 {
 546         int err;
 547         struct ethtool_cmd cmd;
 548
 549         ASSERT_RTNL();
 550
 551         if (dev->ethtool_ops->get_link_ksettings) {
 552                 memset(link_ksettings, 0, sizeof(*link_ksettings));
 553                 return dev->ethtool_ops->get_link_ksettings(dev,
 554                                                             link_ksettings);
 555         }
 556
 557         /* driver doesn't support %ethtool_link_ksettings API. revert to
 558          * legacy %ethtool_cmd API, unless it's not supported either.
 559          * TODO: remove when ethtool_ops::get_settings disappears internally
 560          */
 561         if (!dev->ethtool_ops->get_settings)
 562                 return -EOPNOTSUPP;
 563
 564         memset(&cmd, 0, sizeof(cmd));
 565         cmd.cmd = ETHTOOL_GSET;
 566         err = dev->ethtool_ops->get_settings(dev, &cmd);
 567         if (err < 0)
 568                 return err;
 569
 570         /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
 571          */
 572         convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
 573         return err;
 574 }
 575 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 576
 577 /* convert ethtool_link_usettings in user space to a kernel internal
 578  * ethtool_link_ksettings. return 0 on success, errno on error.
 579  */
 580 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 581                                          const void __user *from)
 582 {
 583         struct ethtool_link_usettings link_usettings;
 584
 585         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 586                 return -EFAULT;
 587
 588         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 589         bitmap_from_u32array(to->link_modes.supported,
 590                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 591                              link_usettings.link_modes.supported,
 592                              __ETHTOOL_LINK_MODE_MASK_NU32);
 593         bitmap_from_u32array(to->link_modes.advertising,
 594                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 595                              link_usettings.link_modes.advertising,
 596                              __ETHTOOL_LINK_MODE_MASK_NU32);
 597         bitmap_from_u32array(to->link_modes.lp_advertising,
 598                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 599                              link_usettings.link_modes.lp_advertising,
 600                              __ETHTOOL_LINK_MODE_MASK_NU32);
 601
 602         return 0;
 603 }
 604
 605 /* convert a kernel internal ethtool_link_ksettings to
 606  * ethtool_link_usettings in user space. return 0 on success, errno on
 607  * error.
 608  */
 609 static int
 610 store_link_ksettings_for_user(void __user *to,
 611                               const struct ethtool_link_ksettings *from)
 612 {
 613         struct ethtool_link_usettings link_usettings;
 614
 615         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 616         bitmap_to_u32array(link_usettings.link_modes.supported,
 617                            __ETHTOOL_LINK_MODE_MASK_NU32,
 618                            from->link_modes.supported,
 619                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 620         bitmap_to_u32array(link_usettings.link_modes.advertising,
 621                            __ETHTOOL_LINK_MODE_MASK_NU32,
 622                            from->link_modes.advertising,
 623                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 624         bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
 625                            __ETHTOOL_LINK_MODE_MASK_NU32,
 626                            from->link_modes.lp_advertising,
 627                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 628
 629         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 630                 return -EFAULT;
 631
 632         return 0;
 633 }
 634
 635 /* Query device for its ethtool_link_settings.
 636  *
 637  * Backward compatibility note: this function must fail when driver
 638  * does not implement ethtool::get_link_ksettings, even if legacy
 639  * ethtool_ops::get_settings is implemented. This tells new versions
 640  * of ethtool that they should use the legacy API %ETHTOOL_GSET for
 641  * this driver, so that they can correctly access the ethtool_cmd
 642  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 643  * implements ethtool_ops::get_settings anymore.
 644  */
 645 static int ethtool_get_link_ksettings(struct net_device *dev,
 646                                       void __user *useraddr)
 647 {
 648         int err = 0;
 649         struct ethtool_link_ksettings link_ksettings;
 650
 651         ASSERT_RTNL();
 652
 653         if (!dev->ethtool_ops->get_link_ksettings)
 654                 return -EOPNOTSUPP;
 655
 656         /* handle bitmap nbits handshake */
 657         if (copy_from_user(&link_ksettings.base, useraddr,
 658                            sizeof(link_ksettings.base)))
 659                 return -EFAULT;
 660
 661         if (__ETHTOOL_LINK_MODE_MASK_NU32
 662             != link_ksettings.base.link_mode_masks_nwords) {
 663                 /* wrong link mode nbits requested */
 664                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 665                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 666                 /* send back number of words required as negative val */
 667                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 668                                    "need too many bits for link modes!");
 669                 link_ksettings.base.link_mode_masks_nwords
 670                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 671
 672                 /* copy the base fields back to user, not the link
 673                  * mode bitmaps
 674                  */
 675                 if (copy_to_user(useraddr, &link_ksettings.base,
 676                                  sizeof(link_ksettings.base)))
 677                         return -EFAULT;
 678
 679                 return 0;
 680         }
 681
 682         /* handshake successful: user/kernel agree on
 683          * link_mode_masks_nwords
 684          */
 685
 686         memset(&link_ksettings, 0, sizeof(link_ksettings));
 687         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 688         if (err < 0)
 689                 return err;
 690
 691         /* make sure we tell the right values to user */
 692         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 693         link_ksettings.base.link_mode_masks_nwords
 694                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 695
 696         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 697 }
 698
 699 /* Update device ethtool_link_settings.
 700  *
 701  * Backward compatibility note: this function must fail when driver
 702  * does not implement ethtool::set_link_ksettings, even if legacy
 703  * ethtool_ops::set_settings is implemented. This tells new versions
 704  * of ethtool that they should use the legacy API %ETHTOOL_SSET for
 705  * this driver, so that they can correctly update the ethtool_cmd
 706  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 707  * implements ethtool_ops::get_settings anymore.
 708  */
 709 static int ethtool_set_link_ksettings(struct net_device *dev,
 710                                       void __user *useraddr)
 711 {
 712         int err;
 713         struct ethtool_link_ksettings link_ksettings;
 714
 715         ASSERT_RTNL();
 716
 717         if (!dev->ethtool_ops->set_link_ksettings)
 718                 return -EOPNOTSUPP;
 719
 720         /* make sure nbits field has expected value */
 721         if (copy_from_user(&link_ksettings.base, useraddr,
 722                            sizeof(link_ksettings.base)))
 723                 return -EFAULT;
 724
 725         if (__ETHTOOL_LINK_MODE_MASK_NU32
 726             != link_ksettings.base.link_mode_masks_nwords)
 727                 return -EINVAL;
 728
 729         /* copy the whole structure, now that we know it has expected
 730          * format
 731          */
 732         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 733         if (err)
 734                 return err;
 735
 736         /* re-check nwords field, just in case */
 737         if (__ETHTOOL_LINK_MODE_MASK_NU32
 738             != link_ksettings.base.link_mode_masks_nwords)
 739                 return -EINVAL;
 740
 741         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 742 }
 743
 744 static void
 745 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
 746 {
 747         char name[sizeof(current->comm)];
 748
 749         pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
 750                      get_task_comm(name, current), details);
 751 }
 752
 753 /* Query device for its ethtool_cmd settings.
 754  *
 755  * Backward compatibility note: for compatibility with legacy ethtool,
 756  * this has to work with both drivers implementing get_link_ksettings
 757  * API and drivers implementing get_settings API. When drivers
 758  * implement get_link_ksettings and report higher link mode bits, a
 759  * kernel warning is logged once (with name of 1st driver/device) to
 760  * recommend user to upgrade ethtool, but the command is successful
 761  * (only the lower link mode bits reported back to user).
 762  */
 763 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 764 {
 765         struct ethtool_cmd cmd;
 766
 767         ASSERT_RTNL();
 768
 769         if (dev->ethtool_ops->get_link_ksettings) {
 770                 /* First, use link_ksettings API if it is supported */
 771                 int err;
 772                 struct ethtool_link_ksettings link_ksettings;
 773
 774                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 775                 err = dev->ethtool_ops->get_link_ksettings(dev,
 776                                                            &link_ksettings);
 777                 if (err < 0)
 778                         return err;
 779                 if (!convert_link_ksettings_to_legacy_settings(&cmd,
 780                                                                &link_ksettings))
 781                         warn_incomplete_ethtool_legacy_settings_conversion(
 782                                 "link modes are only partially reported");
 783
 784                 /* send a sensible cmd tag back to user */
 785                 cmd.cmd = ETHTOOL_GSET;
 786         } else {
 787                 /* driver doesn't support %ethtool_link_ksettings
 788                  * API. revert to legacy %ethtool_cmd API, unless it's
 789                  * not supported either.
 790                  */
 791                 int err;
 792
 793                 if (!dev->ethtool_ops->get_settings)
 794                         return -EOPNOTSUPP;
 795
 796                 memset(&cmd, 0, sizeof(cmd));
 797                 cmd.cmd = ETHTOOL_GSET;
 798                 err = dev->ethtool_ops->get_settings(dev, &cmd);
 799                 if (err < 0)
 800                         return err;
 801         }
 802
 803         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 804                 return -EFAULT;
 805
 806         return 0;
 807 }
 808
 809 /* Update device link settings with given ethtool_cmd.
 810  *
 811  * Backward compatibility note: for compatibility with legacy ethtool,
 812  * this has to work with both drivers implementing set_link_ksettings
 813  * API and drivers implementing set_settings API. When drivers
 814  * implement set_link_ksettings and user's request updates deprecated
 815  * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 816  * warning is logged once (with name of 1st driver/device) to
 817  * recommend user to upgrade ethtool, and the request is rejected.
 818  */
 819 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 820 {
 821         struct ethtool_cmd cmd;
 822
 823         ASSERT_RTNL();
 824
 825         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 826                 return -EFAULT;
 827
 828         /* first, try new %ethtool_link_ksettings API. */
 829         if (dev->ethtool_ops->set_link_ksettings) {
 830                 struct ethtool_link_ksettings link_ksettings;
 831
 832                 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
 833                                                                &cmd))
 834                         return -EINVAL;
 835
 836                 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
 837                 link_ksettings.base.link_mode_masks_nwords
 838                         = __ETHTOOL_LINK_MODE_MASK_NU32;
 839                 return dev->ethtool_ops->set_link_ksettings(dev,
 840                                                             &link_ksettings);
 841         }
 842
 843         /* legacy %ethtool_cmd API */
 844
 845         /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
 846          * disappears internally
 847          */
 848
 849         if (!dev->ethtool_ops->set_settings)
 850                 return -EOPNOTSUPP;
 851
 852         return dev->ethtool_ops->set_settings(dev, &cmd);
 853 }
 854
 855 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 856                                                   void __user *useraddr)
 857 {
 858         struct ethtool_drvinfo info;
 859         const struct ethtool_ops *ops = dev->ethtool_ops;
 860
 861         memset(&info, 0, sizeof(info));
 862         info.cmd = ETHTOOL_GDRVINFO;
 863         if (ops->get_drvinfo) {
 864                 ops->get_drvinfo(dev, &info);
 865         } else if (dev->dev.parent && dev->dev.parent->driver) {
 866                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 867                         sizeof(info.bus_info));
 868                 strlcpy(info.driver, dev->dev.parent->driver->name,
 869                         sizeof(info.driver));
 870         } else {
 871                 return -EOPNOTSUPP;
 872         }
 873
 874         /*
 875          * this method of obtaining string set info is deprecated;
 876          * Use ETHTOOL_GSSET_INFO instead.
 877          */
 878         if (ops->get_sset_count) {
 879                 int rc;
 880
 881                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 882                 if (rc >= 0)
 883                         info.testinfo_len = rc;
 884                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 885                 if (rc >= 0)
 886                         info.n_stats = rc;
 887                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 888                 if (rc >= 0)
 889                         info.n_priv_flags = rc;
 890         }
 891         if (ops->get_regs_len)
 892                 info.regdump_len = ops->get_regs_len(dev);
 893         if (ops->get_eeprom_len)
 894                 info.eedump_len = ops->get_eeprom_len(dev);
 895
 896         if (copy_to_user(useraddr, &info, sizeof(info)))
 897                 return -EFAULT;
 898         return 0;
 899 }
 900
 901 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 902                                                     void __user *useraddr)
 903 {
 904         struct ethtool_sset_info info;
 905         u64 sset_mask;
 906         int i, idx = 0, n_bits = 0, ret, rc;
 907         u32 *info_buf = NULL;
 908
 909         if (copy_from_user(&info, useraddr, sizeof(info)))
 910                 return -EFAULT;
 911
 912         /* store copy of mask, because we zero struct later on */
 913         sset_mask = info.sset_mask;
 914         if (!sset_mask)
 915                 return 0;
 916
 917         /* calculate size of return buffer */
 918         n_bits = hweight64(sset_mask);
 919
 920         memset(&info, 0, sizeof(info));
 921         info.cmd = ETHTOOL_GSSET_INFO;
 922
 923         info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
 924         if (!info_buf)
 925                 return -ENOMEM;
 926
 927         /*
 928          * fill return buffer based on input bitmask and successful
 929          * get_sset_count return
 930          */
 931         for (i = 0; i < 64; i++) {
 932                 if (!(sset_mask & (1ULL << i)))
 933                         continue;
 934
 935                 rc = __ethtool_get_sset_count(dev, i);
 936                 if (rc >= 0) {
 937                         info.sset_mask |= (1ULL << i);
 938                         info_buf[idx++] = rc;
 939                 }
 940         }
 941
 942         ret = -EFAULT;
 943         if (copy_to_user(useraddr, &info, sizeof(info)))
 944                 goto out;
 945
 946         useraddr += offsetof(struct ethtool_sset_info, data);
 947         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 948                 goto out;
 949
 950         ret = 0;
 951
 952 out:
 953         kfree(info_buf);
 954         return ret;
 955 }
 956
 957 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 958                                                 u32 cmd, void __user *useraddr)
 959 {
 960         struct ethtool_rxnfc info;
 961         size_t info_size = sizeof(info);
 962         int rc;
 963
 964         if (!dev->ethtool_ops->set_rxnfc)
 965                 return -EOPNOTSUPP;
 966
 967         /* struct ethtool_rxnfc was originally defined for
 968          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 969          * members.  User-space might still be using that
 970          * definition. */
 971         if (cmd == ETHTOOL_SRXFH)
 972                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 973                              sizeof(info.data));
 974
 975         if (copy_from_user(&info, useraddr, info_size))
 976                 return -EFAULT;
 977
 978         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 979         if (rc)
 980                 return rc;
 981
 982         if (cmd == ETHTOOL_SRXCLSRLINS &&
 983             copy_to_user(useraddr, &info, info_size))
 984                 return -EFAULT;
 985
 986         return 0;
 987 }
 988
 989 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 990                                                 u32 cmd, void __user *useraddr)
 991 {
 992         struct ethtool_rxnfc info;
 993         size_t info_size = sizeof(info);
 994         const struct ethtool_ops *ops = dev->ethtool_ops;
 995         int ret;
 996         void *rule_buf = NULL;
 997
 998         if (!ops->get_rxnfc)
 999                 return -EOPNOTSUPP;
1000
1001         /* struct ethtool_rxnfc was originally defined for
1002          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1003          * members.  User-space might still be using that
1004          * definition. */
1005         if (cmd == ETHTOOL_GRXFH)
1006                 info_size = (offsetof(struct ethtool_rxnfc, data) +
1007                              sizeof(info.data));
1008
1009         if (copy_from_user(&info, useraddr, info_size))
1010                 return -EFAULT;
1011
1012         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1013                 if (info.rule_cnt > 0) {
1014                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1015                                 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1016                                                    GFP_USER);
1017                         if (!rule_buf)
1018                                 return -ENOMEM;
1019                 }
1020         }
1021
1022         ret = ops->get_rxnfc(dev, &info, rule_buf);
1023         if (ret < 0)
1024                 goto err_out;
1025
1026         ret = -EFAULT;
1027         if (copy_to_user(useraddr, &info, info_size))
1028                 goto err_out;
1029
1030         if (rule_buf) {
1031                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1032                 if (copy_to_user(useraddr, rule_buf,
1033                                  info.rule_cnt * sizeof(u32)))
1034                         goto err_out;
1035         }
1036         ret = 0;
1037
1038 err_out:
1039         kfree(rule_buf);
1040
1041         return ret;
1042 }
1043
1044 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1045                                         struct ethtool_rxnfc *rx_rings,
1046                                         u32 size)
1047 {
1048         int i;
1049
1050         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1051                 return -EFAULT;
1052
1053         /* Validate ring indices */
1054         for (i = 0; i < size; i++)
1055                 if (indir[i] >= rx_rings->data)
1056                         return -EINVAL;
1057
1058         return 0;
1059 }
1060
1061 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1062
1063 void netdev_rss_key_fill(void *buffer, size_t len)
1064 {
1065         BUG_ON(len > sizeof(netdev_rss_key));
1066         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1067         memcpy(buffer, netdev_rss_key, len);
1068 }
1069 EXPORT_SYMBOL(netdev_rss_key_fill);
1070
1071 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1072 {
1073         u32 dev_size, current_max = 0;
1074         u32 *indir;
1075         int ret;
1076
1077         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1078             !dev->ethtool_ops->get_rxfh)
1079                 return -EOPNOTSUPP;
1080         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1081         if (dev_size == 0)
1082                 return -EOPNOTSUPP;
1083
1084         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1085         if (!indir)
1086                 return -ENOMEM;
1087
1088         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1089         if (ret)
1090                 goto out;
1091
1092         while (dev_size--)
1093                 current_max = max(current_max, indir[dev_size]);
1094
1095         *max = current_max;
1096
1097 out:
1098         kfree(indir);
1099         return ret;
1100 }
1101
1102 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1103                                                      void __user *useraddr)
1104 {
1105         u32 user_size, dev_size;
1106         u32 *indir;
1107         int ret;
1108
1109         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1110             !dev->ethtool_ops->get_rxfh)
1111                 return -EOPNOTSUPP;
1112         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1113         if (dev_size == 0)
1114                 return -EOPNOTSUPP;
1115
1116         if (copy_from_user(&user_size,
1117                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1118                            sizeof(user_size)))
1119                 return -EFAULT;
1120
1121         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1122                          &dev_size, sizeof(dev_size)))
1123                 return -EFAULT;
1124
1125         /* If the user buffer size is 0, this is just a query for the
1126          * device table size.  Otherwise, if it's smaller than the
1127          * device table size it's an error.
1128          */
1129         if (user_size < dev_size)
1130                 return user_size == 0 ? 0 : -EINVAL;
1131
1132         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1133         if (!indir)
1134                 return -ENOMEM;
1135
1136         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1137         if (ret)
1138                 goto out;
1139
1140         if (copy_to_user(useraddr +
1141                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1142                          indir, dev_size * sizeof(indir[0])))
1143                 ret = -EFAULT;
1144
1145 out:
1146         kfree(indir);
1147         return ret;
1148 }
1149
1150 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1151                                                      void __user *useraddr)
1152 {
1153         struct ethtool_rxnfc rx_rings;
1154         u32 user_size, dev_size, i;
1155         u32 *indir;
1156         const struct ethtool_ops *ops = dev->ethtool_ops;
1157         int ret;
1158         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1159
1160         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1161             !ops->get_rxnfc)
1162                 return -EOPNOTSUPP;
1163
1164         dev_size = ops->get_rxfh_indir_size(dev);
1165         if (dev_size == 0)
1166                 return -EOPNOTSUPP;
1167
1168         if (copy_from_user(&user_size,
1169                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1170                            sizeof(user_size)))
1171                 return -EFAULT;
1172
1173         if (user_size != 0 && user_size != dev_size)
1174                 return -EINVAL;
1175
1176         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1177         if (!indir)
1178                 return -ENOMEM;
1179
1180         rx_rings.cmd = ETHTOOL_GRXRINGS;
1181         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1182         if (ret)
1183                 goto out;
1184
1185         if (user_size == 0) {
1186                 for (i = 0; i < dev_size; i++)
1187                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1188         } else {
1189                 ret = ethtool_copy_validate_indir(indir,
1190                                                   useraddr + ringidx_offset,
1191                                                   &rx_rings,
1192                                                   dev_size);
1193                 if (ret)
1194                         goto out;
1195         }
1196
1197         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1198         if (ret)
1199                 goto out;
1200
1201         /* indicate whether rxfh was set to default */
1202         if (user_size == 0)
1203                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1204         else
1205                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1206
1207 out:
1208         kfree(indir);
1209         return ret;
1210 }
1211
1212 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1213                                                void __user *useraddr)
1214 {
1215         int ret;
1216         const struct ethtool_ops *ops = dev->ethtool_ops;
1217         u32 user_indir_size, user_key_size;
1218         u32 dev_indir_size = 0, dev_key_size = 0;
1219         struct ethtool_rxfh rxfh;
1220         u32 total_size;
1221         u32 indir_bytes;
1222         u32 *indir = NULL;
1223         u8 dev_hfunc = 0;
1224         u8 *hkey = NULL;
1225         u8 *rss_config;
1226
1227         if (!ops->get_rxfh)
1228                 return -EOPNOTSUPP;
1229
1230         if (ops->get_rxfh_indir_size)
1231                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1232         if (ops->get_rxfh_key_size)
1233                 dev_key_size = ops->get_rxfh_key_size(dev);
1234
1235         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1236                 return -EFAULT;
1237         user_indir_size = rxfh.indir_size;
1238         user_key_size = rxfh.key_size;
1239
1240         /* Check that reserved fields are 0 for now */
1241         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1242             rxfh.rsvd8[2] || rxfh.rsvd32)
1243                 return -EINVAL;
1244
1245         rxfh.indir_size = dev_indir_size;
1246         rxfh.key_size = dev_key_size;
1247         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1248                 return -EFAULT;
1249
1250         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1251             (user_key_size && (user_key_size != dev_key_size)))
1252                 return -EINVAL;
1253
1254         indir_bytes = user_indir_size * sizeof(indir[0]);
1255         total_size = indir_bytes + user_key_size;
1256         rss_config = kzalloc(total_size, GFP_USER);
1257         if (!rss_config)
1258                 return -ENOMEM;
1259
1260         if (user_indir_size)
1261                 indir = (u32 *)rss_config;
1262
1263         if (user_key_size)
1264                 hkey = rss_config + indir_bytes;
1265
1266         ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1267         if (ret)
1268                 goto out;
1269
1270         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1271                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1272                 ret = -EFAULT;
1273         } else if (copy_to_user(useraddr +
1274                               offsetof(struct ethtool_rxfh, rss_config[0]),
1275                               rss_config, total_size)) {
1276                 ret = -EFAULT;
1277         }
1278 out:
1279         kfree(rss_config);
1280
1281         return ret;
1282 }
1283
1284 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1285                                                void __user *useraddr)
1286 {
1287         int ret;
1288         const struct ethtool_ops *ops = dev->ethtool_ops;
1289         struct ethtool_rxnfc rx_rings;
1290         struct ethtool_rxfh rxfh;
1291         u32 dev_indir_size = 0, dev_key_size = 0, i;
1292         u32 *indir = NULL, indir_bytes = 0;
1293         u8 *hkey = NULL;
1294         u8 *rss_config;
1295         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1296
1297         if (!ops->get_rxnfc || !ops->set_rxfh)
1298                 return -EOPNOTSUPP;
1299
1300         if (ops->get_rxfh_indir_size)
1301                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1302         if (ops->get_rxfh_key_size)
1303                 dev_key_size = ops->get_rxfh_key_size(dev);
1304
1305         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1306                 return -EFAULT;
1307
1308         /* Check that reserved fields are 0 for now */
1309         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1310             rxfh.rsvd8[2] || rxfh.rsvd32)
1311                 return -EINVAL;
1312
1313         /* If either indir, hash key or function is valid, proceed further.
1314          * Must request at least one change: indir size, hash key or function.
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                 return -EINVAL;
1323
1324         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1325                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1326
1327         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1328         if (!rss_config)
1329                 return -ENOMEM;
1330
1331         rx_rings.cmd = ETHTOOL_GRXRINGS;
1332         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1333         if (ret)
1334                 goto out;
1335
1336         /* rxfh.indir_size == 0 means reset the indir table to default.
1337          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1338          */
1339         if (rxfh.indir_size &&
1340             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1341                 indir = (u32 *)rss_config;
1342                 ret = ethtool_copy_validate_indir(indir,
1343                                                   useraddr + rss_cfg_offset,
1344                                                   &rx_rings,
1345                                                   rxfh.indir_size);
1346                 if (ret)
1347                         goto out;
1348         } else if (rxfh.indir_size == 0) {
1349                 indir = (u32 *)rss_config;
1350                 for (i = 0; i < dev_indir_size; i++)
1351                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1352         }
1353
1354         if (rxfh.key_size) {
1355                 hkey = rss_config + indir_bytes;
1356                 if (copy_from_user(hkey,
1357                                    useraddr + rss_cfg_offset + indir_bytes,
1358                                    rxfh.key_size)) {
1359                         ret = -EFAULT;
1360                         goto out;
1361                 }
1362         }
1363
1364         ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1365         if (ret)
1366                 goto out;
1367
1368         /* indicate whether rxfh was set to default */
1369         if (rxfh.indir_size == 0)
1370                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1371         else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1372                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1373
1374 out:
1375         kfree(rss_config);
1376         return ret;
1377 }
1378
1379 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1380 {
1381         struct ethtool_regs regs;
1382         const struct ethtool_ops *ops = dev->ethtool_ops;
1383         void *regbuf;
1384         int reglen, ret;
1385
1386         if (!ops->get_regs || !ops->get_regs_len)
1387                 return -EOPNOTSUPP;
1388
1389         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1390                 return -EFAULT;
1391
1392         reglen = ops->get_regs_len(dev);
1393         if (regs.len > reglen)
1394                 regs.len = reglen;
1395
1396         regbuf = vzalloc(reglen);
1397         if (reglen && !regbuf)
1398                 return -ENOMEM;
1399
1400         ops->get_regs(dev, &regs, regbuf);
1401
1402         ret = -EFAULT;
1403         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1404                 goto out;
1405         useraddr += offsetof(struct ethtool_regs, data);
1406         if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1407                 goto out;
1408         ret = 0;
1409
1410  out:
1411         vfree(regbuf);
1412         return ret;
1413 }
1414
1415 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1416 {
1417         struct ethtool_value reset;
1418         int ret;
1419
1420         if (!dev->ethtool_ops->reset)
1421                 return -EOPNOTSUPP;
1422
1423         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1424                 return -EFAULT;
1425
1426         ret = dev->ethtool_ops->reset(dev, &reset.data);
1427         if (ret)
1428                 return ret;
1429
1430         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1431                 return -EFAULT;
1432         return 0;
1433 }
1434
1435 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1436 {
1437         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1438
1439         if (!dev->ethtool_ops->get_wol)
1440                 return -EOPNOTSUPP;
1441
1442         dev->ethtool_ops->get_wol(dev, &wol);
1443
1444         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1445                 return -EFAULT;
1446         return 0;
1447 }
1448
1449 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1450 {
1451         struct ethtool_wolinfo wol;
1452
1453         if (!dev->ethtool_ops->set_wol)
1454                 return -EOPNOTSUPP;
1455
1456         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1457                 return -EFAULT;
1458
1459         return dev->ethtool_ops->set_wol(dev, &wol);
1460 }
1461
1462 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1463 {
1464         struct ethtool_eee edata;
1465         int rc;
1466
1467         if (!dev->ethtool_ops->get_eee)
1468                 return -EOPNOTSUPP;
1469
1470         memset(&edata, 0, sizeof(struct ethtool_eee));
1471         edata.cmd = ETHTOOL_GEEE;
1472         rc = dev->ethtool_ops->get_eee(dev, &edata);
1473
1474         if (rc)
1475                 return rc;
1476
1477         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1478                 return -EFAULT;
1479
1480         return 0;
1481 }
1482
1483 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1484 {
1485         struct ethtool_eee edata;
1486
1487         if (!dev->ethtool_ops->set_eee)
1488                 return -EOPNOTSUPP;
1489
1490         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1491                 return -EFAULT;
1492
1493         return dev->ethtool_ops->set_eee(dev, &edata);
1494 }
1495
1496 static int ethtool_nway_reset(struct net_device *dev)
1497 {
1498         if (!dev->ethtool_ops->nway_reset)
1499                 return -EOPNOTSUPP;
1500
1501         return dev->ethtool_ops->nway_reset(dev);
1502 }
1503
1504 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1505 {
1506         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1507
1508         if (!dev->ethtool_ops->get_link)
1509                 return -EOPNOTSUPP;
1510
1511         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1512
1513         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1514                 return -EFAULT;
1515         return 0;
1516 }
1517
1518 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1519                                   int (*getter)(struct net_device *,
1520                                                 struct ethtool_eeprom *, u8 *),
1521                                   u32 total_len)
1522 {
1523         struct ethtool_eeprom eeprom;
1524         void __user *userbuf = useraddr + sizeof(eeprom);
1525         u32 bytes_remaining;
1526         u8 *data;
1527         int ret = 0;
1528
1529         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1530                 return -EFAULT;
1531
1532         /* Check for wrap and zero */
1533         if (eeprom.offset + eeprom.len <= eeprom.offset)
1534                 return -EINVAL;
1535
1536         /* Check for exceeding total eeprom len */
1537         if (eeprom.offset + eeprom.len > total_len)
1538                 return -EINVAL;
1539
1540         data = kmalloc(PAGE_SIZE, GFP_USER);
1541         if (!data)
1542                 return -ENOMEM;
1543
1544         bytes_remaining = eeprom.len;
1545         while (bytes_remaining > 0) {
1546                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1547
1548                 ret = getter(dev, &eeprom, data);
1549                 if (ret)
1550                         break;
1551                 if (copy_to_user(userbuf, data, eeprom.len)) {
1552                         ret = -EFAULT;
1553                         break;
1554                 }
1555                 userbuf += eeprom.len;
1556                 eeprom.offset += eeprom.len;
1557                 bytes_remaining -= eeprom.len;
1558         }
1559
1560         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1561         eeprom.offset -= eeprom.len;
1562         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1563                 ret = -EFAULT;
1564
1565         kfree(data);
1566         return ret;
1567 }
1568
1569 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1570 {
1571         const struct ethtool_ops *ops = dev->ethtool_ops;
1572
1573         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1574             !ops->get_eeprom_len(dev))
1575                 return -EOPNOTSUPP;
1576
1577         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1578                                       ops->get_eeprom_len(dev));
1579 }
1580
1581 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1582 {
1583         struct ethtool_eeprom eeprom;
1584         const struct ethtool_ops *ops = dev->ethtool_ops;
1585         void __user *userbuf = useraddr + sizeof(eeprom);
1586         u32 bytes_remaining;
1587         u8 *data;
1588         int ret = 0;
1589
1590         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1591             !ops->get_eeprom_len(dev))
1592                 return -EOPNOTSUPP;
1593
1594         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1595                 return -EFAULT;
1596
1597         /* Check for wrap and zero */
1598         if (eeprom.offset + eeprom.len <= eeprom.offset)
1599                 return -EINVAL;
1600
1601         /* Check for exceeding total eeprom len */
1602         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1603                 return -EINVAL;
1604
1605         data = kmalloc(PAGE_SIZE, GFP_USER);
1606         if (!data)
1607                 return -ENOMEM;
1608
1609         bytes_remaining = eeprom.len;
1610         while (bytes_remaining > 0) {
1611                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1612
1613                 if (copy_from_user(data, userbuf, eeprom.len)) {
1614                         ret = -EFAULT;
1615                         break;
1616                 }
1617                 ret = ops->set_eeprom(dev, &eeprom, data);
1618                 if (ret)
1619                         break;
1620                 userbuf += eeprom.len;
1621                 eeprom.offset += eeprom.len;
1622                 bytes_remaining -= eeprom.len;
1623         }
1624
1625         kfree(data);
1626         return ret;
1627 }
1628
1629 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1630                                                    void __user *useraddr)
1631 {
1632         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1633
1634         if (!dev->ethtool_ops->get_coalesce)
1635                 return -EOPNOTSUPP;
1636
1637         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1638
1639         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1640                 return -EFAULT;
1641         return 0;
1642 }
1643
1644 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1645                                                    void __user *useraddr)
1646 {
1647         struct ethtool_coalesce coalesce;
1648
1649         if (!dev->ethtool_ops->set_coalesce)
1650                 return -EOPNOTSUPP;
1651
1652         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1653                 return -EFAULT;
1654
1655         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1656 }
1657
1658 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1659 {
1660         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1661
1662         if (!dev->ethtool_ops->get_ringparam)
1663                 return -EOPNOTSUPP;
1664
1665         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1666
1667         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1668                 return -EFAULT;
1669         return 0;
1670 }
1671
1672 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1673 {
1674         struct ethtool_ringparam ringparam;
1675
1676         if (!dev->ethtool_ops->set_ringparam)
1677                 return -EOPNOTSUPP;
1678
1679         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1680                 return -EFAULT;
1681
1682         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1683 }
1684
1685 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1686                                                    void __user *useraddr)
1687 {
1688         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1689
1690         if (!dev->ethtool_ops->get_channels)
1691                 return -EOPNOTSUPP;
1692
1693         dev->ethtool_ops->get_channels(dev, &channels);
1694
1695         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1696                 return -EFAULT;
1697         return 0;
1698 }
1699
1700 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1701                                                    void __user *useraddr)
1702 {
1703         struct ethtool_channels channels, max;
1704         u32 max_rx_in_use = 0;
1705
1706         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1707                 return -EOPNOTSUPP;
1708
1709         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1710                 return -EFAULT;
1711
1712         dev->ethtool_ops->get_channels(dev, &max);
1713
1714         /* ensure new counts are within the maximums */
1715         if ((channels.rx_count > max.max_rx) ||
1716             (channels.tx_count > max.max_tx) ||
1717             (channels.combined_count > max.max_combined) ||
1718             (channels.other_count > max.max_other))
1719                 return -EINVAL;
1720
1721         /* ensure the new Rx count fits within the configured Rx flow
1722          * indirection table settings */
1723         if (netif_is_rxfh_configured(dev) &&
1724             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1725             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1726             return -EINVAL;
1727
1728         return dev->ethtool_ops->set_channels(dev, &channels);
1729 }
1730
1731 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1732 {
1733         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1734
1735         if (!dev->ethtool_ops->get_pauseparam)
1736                 return -EOPNOTSUPP;
1737
1738         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1739
1740         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1741                 return -EFAULT;
1742         return 0;
1743 }
1744
1745 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1746 {
1747         struct ethtool_pauseparam pauseparam;
1748
1749         if (!dev->ethtool_ops->set_pauseparam)
1750                 return -EOPNOTSUPP;
1751
1752         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1753                 return -EFAULT;
1754
1755         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1756 }
1757
1758 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1759 {
1760         struct ethtool_test test;
1761         const struct ethtool_ops *ops = dev->ethtool_ops;
1762         u64 *data;
1763         int ret, test_len;
1764
1765         if (!ops->self_test || !ops->get_sset_count)
1766                 return -EOPNOTSUPP;
1767
1768         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1769         if (test_len < 0)
1770                 return test_len;
1771         WARN_ON(test_len == 0);
1772
1773         if (copy_from_user(&test, useraddr, sizeof(test)))
1774                 return -EFAULT;
1775
1776         test.len = test_len;
1777         data = kmalloc(test_len * sizeof(u64), GFP_USER);
1778         if (!data)
1779                 return -ENOMEM;
1780
1781         ops->self_test(dev, &test, data);
1782
1783         ret = -EFAULT;
1784         if (copy_to_user(useraddr, &test, sizeof(test)))
1785                 goto out;
1786         useraddr += sizeof(test);
1787         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1788                 goto out;
1789         ret = 0;
1790
1791  out:
1792         kfree(data);
1793         return ret;
1794 }
1795
1796 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1797 {
1798         struct ethtool_gstrings gstrings;
1799         u8 *data;
1800         int ret;
1801
1802         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1803                 return -EFAULT;
1804
1805         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1806         if (ret < 0)
1807                 return ret;
1808
1809         gstrings.len = ret;
1810
1811         data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1812         if (!data)
1813                 return -ENOMEM;
1814
1815         __ethtool_get_strings(dev, gstrings.string_set, data);
1816
1817         ret = -EFAULT;
1818         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1819                 goto out;
1820         useraddr += sizeof(gstrings);
1821         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1822                 goto out;
1823         ret = 0;
1824
1825 out:
1826         kfree(data);
1827         return ret;
1828 }
1829
1830 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1831 {
1832         struct ethtool_value id;
1833         static bool busy;
1834         const struct ethtool_ops *ops = dev->ethtool_ops;
1835         int rc;
1836
1837         if (!ops->set_phys_id)
1838                 return -EOPNOTSUPP;
1839
1840         if (busy)
1841                 return -EBUSY;
1842
1843         if (copy_from_user(&id, useraddr, sizeof(id)))
1844                 return -EFAULT;
1845
1846         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1847         if (rc < 0)
1848                 return rc;
1849
1850         /* Drop the RTNL lock while waiting, but prevent reentry or
1851          * removal of the device.
1852          */
1853         busy = true;
1854         dev_hold(dev);
1855         rtnl_unlock();
1856
1857         if (rc == 0) {
1858                 /* Driver will handle this itself */
1859                 schedule_timeout_interruptible(
1860                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1861         } else {
1862                 /* Driver expects to be called at twice the frequency in rc */
1863                 int n = rc * 2, i, interval = HZ / n;
1864
1865                 /* Count down seconds */
1866                 do {
1867                         /* Count down iterations per second */
1868                         i = n;
1869                         do {
1870                                 rtnl_lock();
1871                                 rc = ops->set_phys_id(dev,
1872                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1873                                 rtnl_unlock();
1874                                 if (rc)
1875                                         break;
1876                                 schedule_timeout_interruptible(interval);
1877                         } while (!signal_pending(current) && --i != 0);
1878                 } while (!signal_pending(current) &&
1879                          (id.data == 0 || --id.data != 0));
1880         }
1881
1882         rtnl_lock();
1883         dev_put(dev);
1884         busy = false;
1885
1886         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1887         return rc;
1888 }
1889
1890 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1891 {
1892         struct ethtool_stats stats;
1893         const struct ethtool_ops *ops = dev->ethtool_ops;
1894         u64 *data;
1895         int ret, n_stats;
1896
1897         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1898                 return -EOPNOTSUPP;
1899
1900         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1901         if (n_stats < 0)
1902                 return n_stats;
1903         WARN_ON(n_stats == 0);
1904
1905         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1906                 return -EFAULT;
1907
1908         stats.n_stats = n_stats;
1909         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1910         if (!data)
1911                 return -ENOMEM;
1912
1913         ops->get_ethtool_stats(dev, &stats, data);
1914
1915         ret = -EFAULT;
1916         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1917                 goto out;
1918         useraddr += sizeof(stats);
1919         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1920                 goto out;
1921         ret = 0;
1922
1923  out:
1924         kfree(data);
1925         return ret;
1926 }
1927
1928 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1929 {
1930         struct ethtool_stats stats;
1931         struct phy_device *phydev = dev->phydev;
1932         u64 *data;
1933         int ret, n_stats;
1934
1935         if (!phydev)
1936                 return -EOPNOTSUPP;
1937
1938         n_stats = phy_get_sset_count(phydev);
1939
1940         if (n_stats < 0)
1941                 return n_stats;
1942         WARN_ON(n_stats == 0);
1943
1944         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1945                 return -EFAULT;
1946
1947         stats.n_stats = n_stats;
1948         data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1949         if (!data)
1950                 return -ENOMEM;
1951
1952         mutex_lock(&phydev->lock);
1953         phydev->drv->get_stats(phydev, &stats, data);
1954         mutex_unlock(&phydev->lock);
1955
1956         ret = -EFAULT;
1957         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1958                 goto out;
1959         useraddr += sizeof(stats);
1960         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1961                 goto out;
1962         ret = 0;
1963
1964  out:
1965         kfree(data);
1966         return ret;
1967 }
1968
1969 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1970 {
1971         struct ethtool_perm_addr epaddr;
1972
1973         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1974                 return -EFAULT;
1975
1976         if (epaddr.size < dev->addr_len)
1977                 return -ETOOSMALL;
1978         epaddr.size = dev->addr_len;
1979
1980         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1981                 return -EFAULT;
1982         useraddr += sizeof(epaddr);
1983         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1984                 return -EFAULT;
1985         return 0;
1986 }
1987
1988 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1989                              u32 cmd, u32 (*actor)(struct net_device *))
1990 {
1991         struct ethtool_value edata = { .cmd = cmd };
1992
1993         if (!actor)
1994                 return -EOPNOTSUPP;
1995
1996         edata.data = actor(dev);
1997
1998         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1999                 return -EFAULT;
2000         return 0;
2001 }
2002
2003 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2004                              void (*actor)(struct net_device *, u32))
2005 {
2006         struct ethtool_value edata;
2007
2008         if (!actor)
2009                 return -EOPNOTSUPP;
2010
2011         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2012                 return -EFAULT;
2013
2014         actor(dev, edata.data);
2015         return 0;
2016 }
2017
2018 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2019                              int (*actor)(struct net_device *, u32))
2020 {
2021         struct ethtool_value edata;
2022
2023         if (!actor)
2024                 return -EOPNOTSUPP;
2025
2026         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2027                 return -EFAULT;
2028
2029         return actor(dev, edata.data);
2030 }
2031
2032 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2033                                                    char __user *useraddr)
2034 {
2035         struct ethtool_flash efl;
2036
2037         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2038                 return -EFAULT;
2039
2040         if (!dev->ethtool_ops->flash_device)
2041                 return -EOPNOTSUPP;
2042
2043         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2044
2045         return dev->ethtool_ops->flash_device(dev, &efl);
2046 }
2047
2048 static int ethtool_set_dump(struct net_device *dev,
2049                         void __user *useraddr)
2050 {
2051         struct ethtool_dump dump;
2052
2053         if (!dev->ethtool_ops->set_dump)
2054                 return -EOPNOTSUPP;
2055
2056         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2057                 return -EFAULT;
2058
2059         return dev->ethtool_ops->set_dump(dev, &dump);
2060 }
2061
2062 static int ethtool_get_dump_flag(struct net_device *dev,
2063                                 void __user *useraddr)
2064 {
2065         int ret;
2066         struct ethtool_dump dump;
2067         const struct ethtool_ops *ops = dev->ethtool_ops;
2068
2069         if (!ops->get_dump_flag)
2070                 return -EOPNOTSUPP;
2071
2072         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2073                 return -EFAULT;
2074
2075         ret = ops->get_dump_flag(dev, &dump);
2076         if (ret)
2077                 return ret;
2078
2079         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2080                 return -EFAULT;
2081         return 0;
2082 }
2083
2084 static int ethtool_get_dump_data(struct net_device *dev,
2085                                 void __user *useraddr)
2086 {
2087         int ret;
2088         __u32 len;
2089         struct ethtool_dump dump, tmp;
2090         const struct ethtool_ops *ops = dev->ethtool_ops;
2091         void *data = NULL;
2092
2093         if (!ops->get_dump_data || !ops->get_dump_flag)
2094                 return -EOPNOTSUPP;
2095
2096         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2097                 return -EFAULT;
2098
2099         memset(&tmp, 0, sizeof(tmp));
2100         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2101         ret = ops->get_dump_flag(dev, &tmp);
2102         if (ret)
2103                 return ret;
2104
2105         len = min(tmp.len, dump.len);
2106         if (!len)
2107                 return -EFAULT;
2108
2109         /* Don't ever let the driver think there's more space available
2110          * than it requested with .get_dump_flag().
2111          */
2112         dump.len = len;
2113
2114         /* Always allocate enough space to hold the whole thing so that the
2115          * driver does not need to check the length and bother with partial
2116          * dumping.
2117          */
2118         data = vzalloc(tmp.len);
2119         if (!data)
2120                 return -ENOMEM;
2121         ret = ops->get_dump_data(dev, &dump, data);
2122         if (ret)
2123                 goto out;
2124
2125         /* There are two sane possibilities:
2126          * 1. The driver's .get_dump_data() does not touch dump.len.
2127          * 2. Or it may set dump.len to how much it really writes, which
2128          *    should be tmp.len (or len if it can do a partial dump).
2129          * In any case respond to userspace with the actual length of data
2130          * it's receiving.
2131          */
2132         WARN_ON(dump.len != len && dump.len != tmp.len);
2133         dump.len = len;
2134
2135         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2136                 ret = -EFAULT;
2137                 goto out;
2138         }
2139         useraddr += offsetof(struct ethtool_dump, data);
2140         if (copy_to_user(useraddr, data, len))
2141                 ret = -EFAULT;
2142 out:
2143         vfree(data);
2144         return ret;
2145 }
2146
2147 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2148 {
2149         int err = 0;
2150         struct ethtool_ts_info info;
2151         const struct ethtool_ops *ops = dev->ethtool_ops;
2152         struct phy_device *phydev = dev->phydev;
2153
2154         memset(&info, 0, sizeof(info));
2155         info.cmd = ETHTOOL_GET_TS_INFO;
2156
2157         if (phydev && phydev->drv && phydev->drv->ts_info) {
2158                 err = phydev->drv->ts_info(phydev, &info);
2159         } else if (ops->get_ts_info) {
2160                 err = ops->get_ts_info(dev, &info);
2161         } else {
2162                 info.so_timestamping =
2163                         SOF_TIMESTAMPING_RX_SOFTWARE |
2164                         SOF_TIMESTAMPING_SOFTWARE;
2165                 info.phc_index = -1;
2166         }
2167
2168         if (err)
2169                 return err;
2170
2171         if (copy_to_user(useraddr, &info, sizeof(info)))
2172                 err = -EFAULT;
2173
2174         return err;
2175 }
2176
2177 static int __ethtool_get_module_info(struct net_device *dev,
2178                                      struct ethtool_modinfo *modinfo)
2179 {
2180         const struct ethtool_ops *ops = dev->ethtool_ops;
2181         struct phy_device *phydev = dev->phydev;
2182
2183         if (phydev && phydev->drv && phydev->drv->module_info)
2184                 return phydev->drv->module_info(phydev, modinfo);
2185
2186         if (ops->get_module_info)
2187                 return ops->get_module_info(dev, modinfo);
2188
2189         return -EOPNOTSUPP;
2190 }
2191
2192 static int ethtool_get_module_info(struct net_device *dev,
2193                                    void __user *useraddr)
2194 {
2195         int ret;
2196         struct ethtool_modinfo modinfo;
2197
2198         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2199                 return -EFAULT;
2200
2201         ret = __ethtool_get_module_info(dev, &modinfo);
2202         if (ret)
2203                 return ret;
2204
2205         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2206                 return -EFAULT;
2207
2208         return 0;
2209 }
2210
2211 static int __ethtool_get_module_eeprom(struct net_device *dev,
2212                                        struct ethtool_eeprom *ee, u8 *data)
2213 {
2214         const struct ethtool_ops *ops = dev->ethtool_ops;
2215         struct phy_device *phydev = dev->phydev;
2216
2217         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2218                 return phydev->drv->module_eeprom(phydev, ee, data);
2219
2220         if (ops->get_module_eeprom)
2221                 return ops->get_module_eeprom(dev, ee, data);
2222
2223         return -EOPNOTSUPP;
2224 }
2225
2226 static int ethtool_get_module_eeprom(struct net_device *dev,
2227                                      void __user *useraddr)
2228 {
2229         int ret;
2230         struct ethtool_modinfo modinfo;
2231
2232         ret = __ethtool_get_module_info(dev, &modinfo);
2233         if (ret)
2234                 return ret;
2235
2236         return ethtool_get_any_eeprom(dev, useraddr,
2237                                       __ethtool_get_module_eeprom,
2238                                       modinfo.eeprom_len);
2239 }
2240
2241 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2242 {
2243         switch (tuna->id) {
2244         case ETHTOOL_RX_COPYBREAK:
2245         case ETHTOOL_TX_COPYBREAK:
2246                 if (tuna->len != sizeof(u32) ||
2247                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2248                         return -EINVAL;
2249                 break;
2250         default:
2251                 return -EINVAL;
2252         }
2253
2254         return 0;
2255 }
2256
2257 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2258 {
2259         int ret;
2260         struct ethtool_tunable tuna;
2261         const struct ethtool_ops *ops = dev->ethtool_ops;
2262         void *data;
2263
2264         if (!ops->get_tunable)
2265                 return -EOPNOTSUPP;
2266         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2267                 return -EFAULT;
2268         ret = ethtool_tunable_valid(&tuna);
2269         if (ret)
2270                 return ret;
2271         data = kmalloc(tuna.len, GFP_USER);
2272         if (!data)
2273                 return -ENOMEM;
2274         ret = ops->get_tunable(dev, &tuna, data);
2275         if (ret)
2276                 goto out;
2277         useraddr += sizeof(tuna);
2278         ret = -EFAULT;
2279         if (copy_to_user(useraddr, data, tuna.len))
2280                 goto out;
2281         ret = 0;
2282
2283 out:
2284         kfree(data);
2285         return ret;
2286 }
2287
2288 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2289 {
2290         int ret;
2291         struct ethtool_tunable tuna;
2292         const struct ethtool_ops *ops = dev->ethtool_ops;
2293         void *data;
2294
2295         if (!ops->set_tunable)
2296                 return -EOPNOTSUPP;
2297         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2298                 return -EFAULT;
2299         ret = ethtool_tunable_valid(&tuna);
2300         if (ret)
2301                 return ret;
2302         data = kmalloc(tuna.len, GFP_USER);
2303         if (!data)
2304                 return -ENOMEM;
2305         useraddr += sizeof(tuna);
2306         ret = -EFAULT;
2307         if (copy_from_user(data, useraddr, tuna.len))
2308                 goto out;
2309         ret = ops->set_tunable(dev, &tuna, data);
2310
2311 out:
2312         kfree(data);
2313         return ret;
2314 }
2315
2316 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2317                                           void __user *useraddr,
2318                                           struct ethtool_per_queue_op *per_queue_opt)
2319 {
2320         u32 bit;
2321         int ret;
2322         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2323
2324         if (!dev->ethtool_ops->get_per_queue_coalesce)
2325                 return -EOPNOTSUPP;
2326
2327         useraddr += sizeof(*per_queue_opt);
2328
2329         bitmap_from_u32array(queue_mask,
2330                              MAX_NUM_QUEUE,
2331                              per_queue_opt->queue_mask,
2332                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2333
2334         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2335                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2336
2337                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2338                 if (ret != 0)
2339                         return ret;
2340                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2341                         return -EFAULT;
2342                 useraddr += sizeof(coalesce);
2343         }
2344
2345         return 0;
2346 }
2347
2348 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2349                                           void __user *useraddr,
2350                                           struct ethtool_per_queue_op *per_queue_opt)
2351 {
2352         u32 bit;
2353         int i, ret = 0;
2354         int n_queue;
2355         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2356         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2357
2358         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2359             (!dev->ethtool_ops->get_per_queue_coalesce))
2360                 return -EOPNOTSUPP;
2361
2362         useraddr += sizeof(*per_queue_opt);
2363
2364         bitmap_from_u32array(queue_mask,
2365                              MAX_NUM_QUEUE,
2366                              per_queue_opt->queue_mask,
2367                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2368         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2369         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2370         if (!backup)
2371                 return -ENOMEM;
2372
2373         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2374                 struct ethtool_coalesce coalesce;
2375
2376                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2377                 if (ret != 0)
2378                         goto roll_back;
2379
2380                 tmp++;
2381
2382                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2383                         ret = -EFAULT;
2384                         goto roll_back;
2385                 }
2386
2387                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2388                 if (ret != 0)
2389                         goto roll_back;
2390
2391                 useraddr += sizeof(coalesce);
2392         }
2393
2394 roll_back:
2395         if (ret != 0) {
2396                 tmp = backup;
2397                 for_each_set_bit(i, queue_mask, bit) {
2398                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2399                         tmp++;
2400                 }
2401         }
2402         kfree(backup);
2403
2404         return ret;
2405 }
2406
2407 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2408 {
2409         struct ethtool_per_queue_op per_queue_opt;
2410
2411         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2412                 return -EFAULT;
2413
2414         switch (per_queue_opt.sub_command) {
2415         case ETHTOOL_GCOALESCE:
2416                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2417         case ETHTOOL_SCOALESCE:
2418                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2419         default:
2420                 return -EOPNOTSUPP;
2421         };
2422 }
2423
2424 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2425
2426 int dev_ethtool(struct net *net, struct ifreq *ifr)
2427 {
2428         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2429         void __user *useraddr = ifr->ifr_data;
2430         u32 ethcmd, sub_cmd;
2431         int rc;
2432         netdev_features_t old_features;
2433
2434         if (!dev || !netif_device_present(dev))
2435                 return -ENODEV;
2436
2437         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2438                 return -EFAULT;
2439
2440         if (ethcmd == ETHTOOL_PERQUEUE) {
2441                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2442                         return -EFAULT;
2443         } else {
2444                 sub_cmd = ethcmd;
2445         }
2446         /* Allow some commands to be done by anyone */
2447         switch (sub_cmd) {
2448         case ETHTOOL_GSET:
2449         case ETHTOOL_GDRVINFO:
2450         case ETHTOOL_GMSGLVL:
2451         case ETHTOOL_GLINK:
2452         case ETHTOOL_GCOALESCE:
2453         case ETHTOOL_GRINGPARAM:
2454         case ETHTOOL_GPAUSEPARAM:
2455         case ETHTOOL_GRXCSUM:
2456         case ETHTOOL_GTXCSUM:
2457         case ETHTOOL_GSG:
2458         case ETHTOOL_GSSET_INFO:
2459         case ETHTOOL_GSTRINGS:
2460         case ETHTOOL_GSTATS:
2461         case ETHTOOL_GPHYSTATS:
2462         case ETHTOOL_GTSO:
2463         case ETHTOOL_GPERMADDR:
2464         case ETHTOOL_GUFO:
2465         case ETHTOOL_GGSO:
2466         case ETHTOOL_GGRO:
2467         case ETHTOOL_GFLAGS:
2468         case ETHTOOL_GPFLAGS:
2469         case ETHTOOL_GRXFH:
2470         case ETHTOOL_GRXRINGS:
2471         case ETHTOOL_GRXCLSRLCNT:
2472         case ETHTOOL_GRXCLSRULE:
2473         case ETHTOOL_GRXCLSRLALL:
2474         case ETHTOOL_GRXFHINDIR:
2475         case ETHTOOL_GRSSH:
2476         case ETHTOOL_GFEATURES:
2477         case ETHTOOL_GCHANNELS:
2478         case ETHTOOL_GET_TS_INFO:
2479         case ETHTOOL_GEEE:
2480         case ETHTOOL_GTUNABLE:
2481                 break;
2482         default:
2483                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2484                         return -EPERM;
2485         }
2486
2487         if (dev->ethtool_ops->begin) {
2488                 rc = dev->ethtool_ops->begin(dev);
2489                 if (rc  < 0)
2490                         return rc;
2491         }
2492         old_features = dev->features;
2493
2494         switch (ethcmd) {
2495         case ETHTOOL_GSET:
2496                 rc = ethtool_get_settings(dev, useraddr);
2497                 break;
2498         case ETHTOOL_SSET:
2499                 rc = ethtool_set_settings(dev, useraddr);
2500                 break;
2501         case ETHTOOL_GDRVINFO:
2502                 rc = ethtool_get_drvinfo(dev, useraddr);
2503                 break;
2504         case ETHTOOL_GREGS:
2505                 rc = ethtool_get_regs(dev, useraddr);
2506                 break;
2507         case ETHTOOL_GWOL:
2508                 rc = ethtool_get_wol(dev, useraddr);
2509                 break;
2510         case ETHTOOL_SWOL:
2511                 rc = ethtool_set_wol(dev, useraddr);
2512                 break;
2513         case ETHTOOL_GMSGLVL:
2514                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2515                                        dev->ethtool_ops->get_msglevel);
2516                 break;
2517         case ETHTOOL_SMSGLVL:
2518                 rc = ethtool_set_value_void(dev, useraddr,
2519                                        dev->ethtool_ops->set_msglevel);
2520                 break;
2521         case ETHTOOL_GEEE:
2522                 rc = ethtool_get_eee(dev, useraddr);
2523                 break;
2524         case ETHTOOL_SEEE:
2525                 rc = ethtool_set_eee(dev, useraddr);
2526                 break;
2527         case ETHTOOL_NWAY_RST:
2528                 rc = ethtool_nway_reset(dev);
2529                 break;
2530         case ETHTOOL_GLINK:
2531                 rc = ethtool_get_link(dev, useraddr);
2532                 break;
2533         case ETHTOOL_GEEPROM:
2534                 rc = ethtool_get_eeprom(dev, useraddr);
2535                 break;
2536         case ETHTOOL_SEEPROM:
2537                 rc = ethtool_set_eeprom(dev, useraddr);
2538                 break;
2539         case ETHTOOL_GCOALESCE:
2540                 rc = ethtool_get_coalesce(dev, useraddr);
2541                 break;
2542         case ETHTOOL_SCOALESCE:
2543                 rc = ethtool_set_coalesce(dev, useraddr);
2544                 break;
2545         case ETHTOOL_GRINGPARAM:
2546                 rc = ethtool_get_ringparam(dev, useraddr);
2547                 break;
2548         case ETHTOOL_SRINGPARAM:
2549                 rc = ethtool_set_ringparam(dev, useraddr);
2550                 break;
2551         case ETHTOOL_GPAUSEPARAM:
2552                 rc = ethtool_get_pauseparam(dev, useraddr);
2553                 break;
2554         case ETHTOOL_SPAUSEPARAM:
2555                 rc = ethtool_set_pauseparam(dev, useraddr);
2556                 break;
2557         case ETHTOOL_TEST:
2558                 rc = ethtool_self_test(dev, useraddr);
2559                 break;
2560         case ETHTOOL_GSTRINGS:
2561                 rc = ethtool_get_strings(dev, useraddr);
2562                 break;
2563         case ETHTOOL_PHYS_ID:
2564                 rc = ethtool_phys_id(dev, useraddr);
2565                 break;
2566         case ETHTOOL_GSTATS:
2567                 rc = ethtool_get_stats(dev, useraddr);
2568                 break;
2569         case ETHTOOL_GPERMADDR:
2570                 rc = ethtool_get_perm_addr(dev, useraddr);
2571                 break;
2572         case ETHTOOL_GFLAGS:
2573                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2574                                         __ethtool_get_flags);
2575                 break;
2576         case ETHTOOL_SFLAGS:
2577                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2578                 break;
2579         case ETHTOOL_GPFLAGS:
2580                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2581                                        dev->ethtool_ops->get_priv_flags);
2582                 break;
2583         case ETHTOOL_SPFLAGS:
2584                 rc = ethtool_set_value(dev, useraddr,
2585                                        dev->ethtool_ops->set_priv_flags);
2586                 break;
2587         case ETHTOOL_GRXFH:
2588         case ETHTOOL_GRXRINGS:
2589         case ETHTOOL_GRXCLSRLCNT:
2590         case ETHTOOL_GRXCLSRULE:
2591         case ETHTOOL_GRXCLSRLALL:
2592                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2593                 break;
2594         case ETHTOOL_SRXFH:
2595         case ETHTOOL_SRXCLSRLDEL:
2596         case ETHTOOL_SRXCLSRLINS:
2597                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2598                 break;
2599         case ETHTOOL_FLASHDEV:
2600                 rc = ethtool_flash_device(dev, useraddr);
2601                 break;
2602         case ETHTOOL_RESET:
2603                 rc = ethtool_reset(dev, useraddr);
2604                 break;
2605         case ETHTOOL_GSSET_INFO:
2606                 rc = ethtool_get_sset_info(dev, useraddr);
2607                 break;
2608         case ETHTOOL_GRXFHINDIR:
2609                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2610                 break;
2611         case ETHTOOL_SRXFHINDIR:
2612                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2613                 break;
2614         case ETHTOOL_GRSSH:
2615                 rc = ethtool_get_rxfh(dev, useraddr);
2616                 break;
2617         case ETHTOOL_SRSSH:
2618                 rc = ethtool_set_rxfh(dev, useraddr);
2619                 break;
2620         case ETHTOOL_GFEATURES:
2621                 rc = ethtool_get_features(dev, useraddr);
2622                 break;
2623         case ETHTOOL_SFEATURES:
2624                 rc = ethtool_set_features(dev, useraddr);
2625                 break;
2626         case ETHTOOL_GTXCSUM:
2627         case ETHTOOL_GRXCSUM:
2628         case ETHTOOL_GSG:
2629         case ETHTOOL_GTSO:
2630         case ETHTOOL_GUFO:
2631         case ETHTOOL_GGSO:
2632         case ETHTOOL_GGRO:
2633                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2634                 break;
2635         case ETHTOOL_STXCSUM:
2636         case ETHTOOL_SRXCSUM:
2637         case ETHTOOL_SSG:
2638         case ETHTOOL_STSO:
2639         case ETHTOOL_SUFO:
2640         case ETHTOOL_SGSO:
2641         case ETHTOOL_SGRO:
2642                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2643                 break;
2644         case ETHTOOL_GCHANNELS:
2645                 rc = ethtool_get_channels(dev, useraddr);
2646                 break;
2647         case ETHTOOL_SCHANNELS:
2648                 rc = ethtool_set_channels(dev, useraddr);
2649                 break;
2650         case ETHTOOL_SET_DUMP:
2651                 rc = ethtool_set_dump(dev, useraddr);
2652                 break;
2653         case ETHTOOL_GET_DUMP_FLAG:
2654                 rc = ethtool_get_dump_flag(dev, useraddr);
2655                 break;
2656         case ETHTOOL_GET_DUMP_DATA:
2657                 rc = ethtool_get_dump_data(dev, useraddr);
2658                 break;
2659         case ETHTOOL_GET_TS_INFO:
2660                 rc = ethtool_get_ts_info(dev, useraddr);
2661                 break;
2662         case ETHTOOL_GMODULEINFO:
2663                 rc = ethtool_get_module_info(dev, useraddr);
2664                 break;
2665         case ETHTOOL_GMODULEEEPROM:
2666                 rc = ethtool_get_module_eeprom(dev, useraddr);
2667                 break;
2668         case ETHTOOL_GTUNABLE:
2669                 rc = ethtool_get_tunable(dev, useraddr);
2670                 break;
2671         case ETHTOOL_STUNABLE:
2672                 rc = ethtool_set_tunable(dev, useraddr);
2673                 break;
2674         case ETHTOOL_GPHYSTATS:
2675                 rc = ethtool_get_phy_stats(dev, useraddr);
2676                 break;
2677         case ETHTOOL_PERQUEUE:
2678                 rc = ethtool_set_per_queue(dev, useraddr);
2679                 break;
2680         case ETHTOOL_GLINKSETTINGS:
2681                 rc = ethtool_get_link_ksettings(dev, useraddr);
2682                 break;
2683         case ETHTOOL_SLINKSETTINGS:
2684                 rc = ethtool_set_link_ksettings(dev, useraddr);
2685                 break;
2686         default:
2687                 rc = -EOPNOTSUPP;
2688         }
2689
2690         if (dev->ethtool_ops->complete)
2691                 dev->ethtool_ops->complete(dev);
2692
2693         if (old_features != dev->features)
2694                 netdev_features_change(dev);
2695
2696         return rc;
2697 }