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_TSO6_BIT] =             "tx-tcp6-segmentation",
  83         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
  84         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
  85         [NETIF_F_GSO_IPIP_BIT] =         "tx-ipip-segmentation",
  86         [NETIF_F_GSO_SIT_BIT] =          "tx-sit-segmentation",
  87         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
  88
  89         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
  90         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
  91         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
  92         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
  93         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
  94         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
  95         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
  96         [NETIF_F_LOOPBACK_BIT] =         "loopback",
  97         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
  98         [NETIF_F_RXALL_BIT] =            "rx-all",
  99         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
 100         [NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
 101         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
 102 };
 103
 104 static const char
 105 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
 106         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
 107         [ETH_RSS_HASH_XOR_BIT] =        "xor",
 108 };
 109
 110 static const char
 111 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 112         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 113         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
 114         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
 115 };
 116
 117 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 118 {
 119         struct ethtool_gfeatures cmd = {
 120                 .cmd = ETHTOOL_GFEATURES,
 121                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 122         };
 123         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 124         u32 __user *sizeaddr;
 125         u32 copy_size;
 126         int i;
 127
 128         /* in case feature bits run out again */
 129         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
 130
 131         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 132                 features[i].available = (u32)(dev->hw_features >> (32 * i));
 133                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 134                 features[i].active = (u32)(dev->features >> (32 * i));
 135                 features[i].never_changed =
 136                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 137         }
 138
 139         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 140         if (get_user(copy_size, sizeaddr))
 141                 return -EFAULT;
 142
 143         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 144                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 145
 146         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 147                 return -EFAULT;
 148         useraddr += sizeof(cmd);
 149         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 150                 return -EFAULT;
 151
 152         return 0;
 153 }
 154
 155 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 156 {
 157         struct ethtool_sfeatures cmd;
 158         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 159         netdev_features_t wanted = 0, valid = 0;
 160         int i, ret = 0;
 161
 162         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 163                 return -EFAULT;
 164         useraddr += sizeof(cmd);
 165
 166         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 167                 return -EINVAL;
 168
 169         if (copy_from_user(features, useraddr, sizeof(features)))
 170                 return -EFAULT;
 171
 172         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 173                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 174                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 175         }
 176
 177         if (valid & ~NETIF_F_ETHTOOL_BITS)
 178                 return -EINVAL;
 179
 180         if (valid & ~dev->hw_features) {
 181                 valid &= dev->hw_features;
 182                 ret |= ETHTOOL_F_UNSUPPORTED;
 183         }
 184
 185         dev->wanted_features &= ~valid;
 186         dev->wanted_features |= wanted & valid;
 187         __netdev_update_features(dev);
 188
 189         if ((dev->wanted_features ^ dev->features) & valid)
 190                 ret |= ETHTOOL_F_WISH;
 191
 192         return ret;
 193 }
 194
 195 static int phy_get_sset_count(struct phy_device *phydev)
 196 {
 197         int ret;
 198
 199         if (phydev->drv->get_sset_count &&
 200             phydev->drv->get_strings &&
 201             phydev->drv->get_stats) {
 202                 mutex_lock(&phydev->lock);
 203                 ret = phydev->drv->get_sset_count(phydev);
 204                 mutex_unlock(&phydev->lock);
 205
 206                 return ret;
 207         }
 208
 209         return -EOPNOTSUPP;
 210 }
 211
 212 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 213 {
 214         const struct ethtool_ops *ops = dev->ethtool_ops;
 215
 216         if (sset == ETH_SS_FEATURES)
 217                 return ARRAY_SIZE(netdev_features_strings);
 218
 219         if (sset == ETH_SS_RSS_HASH_FUNCS)
 220                 return ARRAY_SIZE(rss_hash_func_strings);
 221
 222         if (sset == ETH_SS_TUNABLES)
 223                 return ARRAY_SIZE(tunable_strings);
 224
 225         if (sset == ETH_SS_PHY_STATS) {
 226                 if (dev->phydev)
 227                         return phy_get_sset_count(dev->phydev);
 228                 else
 229                         return -EOPNOTSUPP;
 230         }
 231
 232         if (ops->get_sset_count && ops->get_strings)
 233                 return ops->get_sset_count(dev, sset);
 234         else
 235                 return -EOPNOTSUPP;
 236 }
 237
 238 static void __ethtool_get_strings(struct net_device *dev,
 239         u32 stringset, u8 *data)
 240 {
 241         const struct ethtool_ops *ops = dev->ethtool_ops;
 242
 243         if (stringset == ETH_SS_FEATURES)
 244                 memcpy(data, netdev_features_strings,
 245                         sizeof(netdev_features_strings));
 246         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 247                 memcpy(data, rss_hash_func_strings,
 248                        sizeof(rss_hash_func_strings));
 249         else if (stringset == ETH_SS_TUNABLES)
 250                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 251         else if (stringset == ETH_SS_PHY_STATS) {
 252                 struct phy_device *phydev = dev->phydev;
 253
 254                 if (phydev) {
 255                         mutex_lock(&phydev->lock);
 256                         phydev->drv->get_strings(phydev, data);
 257                         mutex_unlock(&phydev->lock);
 258                 } else {
 259                         return;
 260                 }
 261         } else
 262                 /* ops->get_strings is valid because checked earlier */
 263                 ops->get_strings(dev, stringset, data);
 264 }
 265
 266 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 267 {
 268         /* feature masks of legacy discrete ethtool ops */
 269
 270         switch (eth_cmd) {
 271         case ETHTOOL_GTXCSUM:
 272         case ETHTOOL_STXCSUM:
 273                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 274         case ETHTOOL_GRXCSUM:
 275         case ETHTOOL_SRXCSUM:
 276                 return NETIF_F_RXCSUM;
 277         case ETHTOOL_GSG:
 278         case ETHTOOL_SSG:
 279                 return NETIF_F_SG;
 280         case ETHTOOL_GTSO:
 281         case ETHTOOL_STSO:
 282                 return NETIF_F_ALL_TSO;
 283         case ETHTOOL_GUFO:
 284         case ETHTOOL_SUFO:
 285                 return NETIF_F_UFO;
 286         case ETHTOOL_GGSO:
 287         case ETHTOOL_SGSO:
 288                 return NETIF_F_GSO;
 289         case ETHTOOL_GGRO:
 290         case ETHTOOL_SGRO:
 291                 return NETIF_F_GRO;
 292         default:
 293                 BUG();
 294         }
 295 }
 296
 297 static int ethtool_get_one_feature(struct net_device *dev,
 298         char __user *useraddr, u32 ethcmd)
 299 {
 300         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 301         struct ethtool_value edata = {
 302                 .cmd = ethcmd,
 303                 .data = !!(dev->features & mask),
 304         };
 305
 306         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 307                 return -EFAULT;
 308         return 0;
 309 }
 310
 311 static int ethtool_set_one_feature(struct net_device *dev,
 312         void __user *useraddr, u32 ethcmd)
 313 {
 314         struct ethtool_value edata;
 315         netdev_features_t mask;
 316
 317         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 318                 return -EFAULT;
 319
 320         mask = ethtool_get_feature_mask(ethcmd);
 321         mask &= dev->hw_features;
 322         if (!mask)
 323                 return -EOPNOTSUPP;
 324
 325         if (edata.data)
 326                 dev->wanted_features |= mask;
 327         else
 328                 dev->wanted_features &= ~mask;
 329
 330         __netdev_update_features(dev);
 331
 332         return 0;
 333 }
 334
 335 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 336                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 337 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 338                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 339                           NETIF_F_RXHASH)
 340
 341 static u32 __ethtool_get_flags(struct net_device *dev)
 342 {
 343         u32 flags = 0;
 344
 345         if (dev->features & NETIF_F_LRO)
 346                 flags |= ETH_FLAG_LRO;
 347         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 348                 flags |= ETH_FLAG_RXVLAN;
 349         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 350                 flags |= ETH_FLAG_TXVLAN;
 351         if (dev->features & NETIF_F_NTUPLE)
 352                 flags |= ETH_FLAG_NTUPLE;
 353         if (dev->features & NETIF_F_RXHASH)
 354                 flags |= ETH_FLAG_RXHASH;
 355
 356         return flags;
 357 }
 358
 359 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 360 {
 361         netdev_features_t features = 0, changed;
 362
 363         if (data & ~ETH_ALL_FLAGS)
 364                 return -EINVAL;
 365
 366         if (data & ETH_FLAG_LRO)
 367                 features |= NETIF_F_LRO;
 368         if (data & ETH_FLAG_RXVLAN)
 369                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 370         if (data & ETH_FLAG_TXVLAN)
 371                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 372         if (data & ETH_FLAG_NTUPLE)
 373                 features |= NETIF_F_NTUPLE;
 374         if (data & ETH_FLAG_RXHASH)
 375                 features |= NETIF_F_RXHASH;
 376
 377         /* allow changing only bits set in hw_features */
 378         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 379         if (changed & ~dev->hw_features)
 380                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 381
 382         dev->wanted_features =
 383                 (dev->wanted_features & ~changed) | (features & changed);
 384
 385         __netdev_update_features(dev);
 386
 387         return 0;
 388 }
 389
 390 static void convert_legacy_u32_to_link_mode(unsigned long *dst, u32 legacy_u32)
 391 {
 392         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 393         dst[0] = legacy_u32;
 394 }
 395
 396 /* return false if src had higher bits set. lower bits always updated. */
 397 static bool convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 398                                             const unsigned long *src)
 399 {
 400         bool retval = true;
 401
 402         /* TODO: following test will soon always be true */
 403         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 404                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 405
 406                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 407                 bitmap_fill(ext, 32);
 408                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 409                 if (bitmap_intersects(ext, src,
 410                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 411                         /* src mask goes beyond bit 31 */
 412                         retval = false;
 413                 }
 414         }
 415         *legacy_u32 = src[0];
 416         return retval;
 417 }
 418
 419 /* return false if legacy contained non-0 deprecated fields
 420  * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
 421  */
 422 static bool
 423 convert_legacy_settings_to_link_ksettings(
 424         struct ethtool_link_ksettings *link_ksettings,
 425         const struct ethtool_cmd *legacy_settings)
 426 {
 427         bool retval = true;
 428
 429         memset(link_ksettings, 0, sizeof(*link_ksettings));
 430
 431         /* This is used to tell users that driver is still using these
 432          * deprecated legacy fields, and they should not use
 433          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
 434          */
 435         if (legacy_settings->transceiver ||
 436             legacy_settings->maxtxpkt ||
 437             legacy_settings->maxrxpkt)
 438                 retval = false;
 439
 440         convert_legacy_u32_to_link_mode(
 441                 link_ksettings->link_modes.supported,
 442                 legacy_settings->supported);
 443         convert_legacy_u32_to_link_mode(
 444                 link_ksettings->link_modes.advertising,
 445                 legacy_settings->advertising);
 446         convert_legacy_u32_to_link_mode(
 447                 link_ksettings->link_modes.lp_advertising,
 448                 legacy_settings->lp_advertising);
 449         link_ksettings->base.speed
 450                 = ethtool_cmd_speed(legacy_settings);
 451         link_ksettings->base.duplex
 452                 = legacy_settings->duplex;
 453         link_ksettings->base.port
 454                 = legacy_settings->port;
 455         link_ksettings->base.phy_address
 456                 = legacy_settings->phy_address;
 457         link_ksettings->base.autoneg
 458                 = legacy_settings->autoneg;
 459         link_ksettings->base.mdio_support
 460                 = legacy_settings->mdio_support;
 461         link_ksettings->base.eth_tp_mdix
 462                 = legacy_settings->eth_tp_mdix;
 463         link_ksettings->base.eth_tp_mdix_ctrl
 464                 = legacy_settings->eth_tp_mdix_ctrl;
 465         return retval;
 466 }
 467
 468 /* return false if ksettings link modes had higher bits
 469  * set. legacy_settings always updated (best effort)
 470  */
 471 static bool
 472 convert_link_ksettings_to_legacy_settings(
 473         struct ethtool_cmd *legacy_settings,
 474         const struct ethtool_link_ksettings *link_ksettings)
 475 {
 476         bool retval = true;
 477
 478         memset(legacy_settings, 0, sizeof(*legacy_settings));
 479         /* this also clears the deprecated fields in legacy structure:
 480          * __u8         transceiver;
 481          * __u32        maxtxpkt;
 482          * __u32        maxrxpkt;
 483          */
 484
 485         retval &= convert_link_mode_to_legacy_u32(
 486                 &legacy_settings->supported,
 487                 link_ksettings->link_modes.supported);
 488         retval &= convert_link_mode_to_legacy_u32(
 489                 &legacy_settings->advertising,
 490                 link_ksettings->link_modes.advertising);
 491         retval &= convert_link_mode_to_legacy_u32(
 492                 &legacy_settings->lp_advertising,
 493                 link_ksettings->link_modes.lp_advertising);
 494         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 495         legacy_settings->duplex
 496                 = link_ksettings->base.duplex;
 497         legacy_settings->port
 498                 = link_ksettings->base.port;
 499         legacy_settings->phy_address
 500                 = link_ksettings->base.phy_address;
 501         legacy_settings->autoneg
 502                 = link_ksettings->base.autoneg;
 503         legacy_settings->mdio_support
 504                 = link_ksettings->base.mdio_support;
 505         legacy_settings->eth_tp_mdix
 506                 = link_ksettings->base.eth_tp_mdix;
 507         legacy_settings->eth_tp_mdix_ctrl
 508                 = link_ksettings->base.eth_tp_mdix_ctrl;
 509         return retval;
 510 }
 511
 512 /* number of 32-bit words to store the user's link mode bitmaps */
 513 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 514         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 515
 516 /* layout of the struct passed from/to userland */
 517 struct ethtool_link_usettings {
 518         struct ethtool_link_settings base;
 519         struct {
 520                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 521                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 522                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 523         } link_modes;
 524 };
 525
 526 /* Internal kernel helper to query a device ethtool_link_settings.
 527  *
 528  * Backward compatibility note: for compatibility with legacy drivers
 529  * that implement only the ethtool_cmd API, this has to work with both
 530  * drivers implementing get_link_ksettings API and drivers
 531  * implementing get_settings API. When drivers implement get_settings
 532  * and report ethtool_cmd deprecated fields
 533  * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
 534  * because the resulting struct ethtool_link_settings does not report them.
 535  */
 536 int __ethtool_get_link_ksettings(struct net_device *dev,
 537                                  struct ethtool_link_ksettings *link_ksettings)
 538 {
 539         int err;
 540         struct ethtool_cmd cmd;
 541
 542         ASSERT_RTNL();
 543
 544         if (dev->ethtool_ops->get_link_ksettings) {
 545                 memset(link_ksettings, 0, sizeof(*link_ksettings));
 546                 return dev->ethtool_ops->get_link_ksettings(dev,
 547                                                             link_ksettings);
 548         }
 549
 550         /* driver doesn't support %ethtool_link_ksettings API. revert to
 551          * legacy %ethtool_cmd API, unless it's not supported either.
 552          * TODO: remove when ethtool_ops::get_settings disappears internally
 553          */
 554         if (!dev->ethtool_ops->get_settings)
 555                 return -EOPNOTSUPP;
 556
 557         memset(&cmd, 0, sizeof(cmd));
 558         cmd.cmd = ETHTOOL_GSET;
 559         err = dev->ethtool_ops->get_settings(dev, &cmd);
 560         if (err < 0)
 561                 return err;
 562
 563         /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
 564          */
 565         convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
 566         return err;
 567 }
 568 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 569
 570 /* convert ethtool_link_usettings in user space to a kernel internal
 571  * ethtool_link_ksettings. return 0 on success, errno on error.
 572  */
 573 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 574                                          const void __user *from)
 575 {
 576         struct ethtool_link_usettings link_usettings;
 577
 578         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 579                 return -EFAULT;
 580
 581         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 582         bitmap_from_u32array(to->link_modes.supported,
 583                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 584                              link_usettings.link_modes.supported,
 585                              __ETHTOOL_LINK_MODE_MASK_NU32);
 586         bitmap_from_u32array(to->link_modes.advertising,
 587                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 588                              link_usettings.link_modes.advertising,
 589                              __ETHTOOL_LINK_MODE_MASK_NU32);
 590         bitmap_from_u32array(to->link_modes.lp_advertising,
 591                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 592                              link_usettings.link_modes.lp_advertising,
 593                              __ETHTOOL_LINK_MODE_MASK_NU32);
 594
 595         return 0;
 596 }
 597
 598 /* convert a kernel internal ethtool_link_ksettings to
 599  * ethtool_link_usettings in user space. return 0 on success, errno on
 600  * error.
 601  */
 602 static int
 603 store_link_ksettings_for_user(void __user *to,
 604                               const struct ethtool_link_ksettings *from)
 605 {
 606         struct ethtool_link_usettings link_usettings;
 607
 608         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 609         bitmap_to_u32array(link_usettings.link_modes.supported,
 610                            __ETHTOOL_LINK_MODE_MASK_NU32,
 611                            from->link_modes.supported,
 612                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 613         bitmap_to_u32array(link_usettings.link_modes.advertising,
 614                            __ETHTOOL_LINK_MODE_MASK_NU32,
 615                            from->link_modes.advertising,
 616                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 617         bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
 618                            __ETHTOOL_LINK_MODE_MASK_NU32,
 619                            from->link_modes.lp_advertising,
 620                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 621
 622         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 623                 return -EFAULT;
 624
 625         return 0;
 626 }
 627
 628 /* Query device for its ethtool_link_settings.
 629  *
 630  * Backward compatibility note: this function must fail when driver
 631  * does not implement ethtool::get_link_ksettings, even if legacy
 632  * ethtool_ops::get_settings is implemented. This tells new versions
 633  * of ethtool that they should use the legacy API %ETHTOOL_GSET for
 634  * this driver, so that they can correctly access the ethtool_cmd
 635  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 636  * implements ethtool_ops::get_settings anymore.
 637  */
 638 static int ethtool_get_link_ksettings(struct net_device *dev,
 639                                       void __user *useraddr)
 640 {
 641         int err = 0;
 642         struct ethtool_link_ksettings link_ksettings;
 643
 644         ASSERT_RTNL();
 645
 646         if (!dev->ethtool_ops->get_link_ksettings)
 647                 return -EOPNOTSUPP;
 648
 649         /* handle bitmap nbits handshake */
 650         if (copy_from_user(&link_ksettings.base, useraddr,
 651                            sizeof(link_ksettings.base)))
 652                 return -EFAULT;
 653
 654         if (__ETHTOOL_LINK_MODE_MASK_NU32
 655             != link_ksettings.base.link_mode_masks_nwords) {
 656                 /* wrong link mode nbits requested */
 657                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 658                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 659                 /* send back number of words required as negative val */
 660                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 661                                    "need too many bits for link modes!");
 662                 link_ksettings.base.link_mode_masks_nwords
 663                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 664
 665                 /* copy the base fields back to user, not the link
 666                  * mode bitmaps
 667                  */
 668                 if (copy_to_user(useraddr, &link_ksettings.base,
 669                                  sizeof(link_ksettings.base)))
 670                         return -EFAULT;
 671
 672                 return 0;
 673         }
 674
 675         /* handshake successful: user/kernel agree on
 676          * link_mode_masks_nwords
 677          */
 678
 679         memset(&link_ksettings, 0, sizeof(link_ksettings));
 680         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 681         if (err < 0)
 682                 return err;
 683
 684         /* make sure we tell the right values to user */
 685         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 686         link_ksettings.base.link_mode_masks_nwords
 687                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 688
 689         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 690 }
 691
 692 /* Update device ethtool_link_settings.
 693  *
 694  * Backward compatibility note: this function must fail when driver
 695  * does not implement ethtool::set_link_ksettings, even if legacy
 696  * ethtool_ops::set_settings is implemented. This tells new versions
 697  * of ethtool that they should use the legacy API %ETHTOOL_SSET for
 698  * this driver, so that they can correctly update the ethtool_cmd
 699  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 700  * implements ethtool_ops::get_settings anymore.
 701  */
 702 static int ethtool_set_link_ksettings(struct net_device *dev,
 703                                       void __user *useraddr)
 704 {
 705         int err;
 706         struct ethtool_link_ksettings link_ksettings;
 707
 708         ASSERT_RTNL();
 709
 710         if (!dev->ethtool_ops->set_link_ksettings)
 711                 return -EOPNOTSUPP;
 712
 713         /* make sure nbits field has expected value */
 714         if (copy_from_user(&link_ksettings.base, useraddr,
 715                            sizeof(link_ksettings.base)))
 716                 return -EFAULT;
 717
 718         if (__ETHTOOL_LINK_MODE_MASK_NU32
 719             != link_ksettings.base.link_mode_masks_nwords)
 720                 return -EINVAL;
 721
 722         /* copy the whole structure, now that we know it has expected
 723          * format
 724          */
 725         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 726         if (err)
 727                 return err;
 728
 729         /* re-check nwords field, just in case */
 730         if (__ETHTOOL_LINK_MODE_MASK_NU32
 731             != link_ksettings.base.link_mode_masks_nwords)
 732                 return -EINVAL;
 733
 734         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 735 }
 736
 737 static void
 738 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
 739 {
 740         char name[sizeof(current->comm)];
 741
 742         pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
 743                      get_task_comm(name, current), details);
 744 }
 745
 746 /* Query device for its ethtool_cmd settings.
 747  *
 748  * Backward compatibility note: for compatibility with legacy ethtool,
 749  * this has to work with both drivers implementing get_link_ksettings
 750  * API and drivers implementing get_settings API. When drivers
 751  * implement get_link_ksettings and report higher link mode bits, a
 752  * kernel warning is logged once (with name of 1st driver/device) to
 753  * recommend user to upgrade ethtool, but the command is successful
 754  * (only the lower link mode bits reported back to user).
 755  */
 756 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 757 {
 758         struct ethtool_cmd cmd;
 759
 760         ASSERT_RTNL();
 761
 762         if (dev->ethtool_ops->get_link_ksettings) {
 763                 /* First, use link_ksettings API if it is supported */
 764                 int err;
 765                 struct ethtool_link_ksettings link_ksettings;
 766
 767                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 768                 err = dev->ethtool_ops->get_link_ksettings(dev,
 769                                                            &link_ksettings);
 770                 if (err < 0)
 771                         return err;
 772                 if (!convert_link_ksettings_to_legacy_settings(&cmd,
 773                                                                &link_ksettings))
 774                         warn_incomplete_ethtool_legacy_settings_conversion(
 775                                 "link modes are only partially reported");
 776
 777                 /* send a sensible cmd tag back to user */
 778                 cmd.cmd = ETHTOOL_GSET;
 779         } else {
 780                 /* driver doesn't support %ethtool_link_ksettings
 781                  * API. revert to legacy %ethtool_cmd API, unless it's
 782                  * not supported either.
 783                  */
 784                 int err;
 785
 786                 if (!dev->ethtool_ops->get_settings)
 787                         return -EOPNOTSUPP;
 788
 789                 memset(&cmd, 0, sizeof(cmd));
 790                 cmd.cmd = ETHTOOL_GSET;
 791                 err = dev->ethtool_ops->get_settings(dev, &cmd);
 792                 if (err < 0)
 793                         return err;
 794         }
 795
 796         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 797                 return -EFAULT;
 798
 799         return 0;
 800 }
 801
 802 /* Update device link settings with given ethtool_cmd.
 803  *
 804  * Backward compatibility note: for compatibility with legacy ethtool,
 805  * this has to work with both drivers implementing set_link_ksettings
 806  * API and drivers implementing set_settings API. When drivers
 807  * implement set_link_ksettings and user's request updates deprecated
 808  * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 809  * warning is logged once (with name of 1st driver/device) to
 810  * recommend user to upgrade ethtool, and the request is rejected.
 811  */
 812 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 813 {
 814         struct ethtool_cmd cmd;
 815
 816         ASSERT_RTNL();
 817
 818         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 819                 return -EFAULT;
 820
 821         /* first, try new %ethtool_link_ksettings API. */
 822         if (dev->ethtool_ops->set_link_ksettings) {
 823                 struct ethtool_link_ksettings link_ksettings;
 824
 825                 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
 826                                                                &cmd))
 827                         return -EINVAL;
 828
 829                 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
 830                 link_ksettings.base.link_mode_masks_nwords
 831                         = __ETHTOOL_LINK_MODE_MASK_NU32;
 832                 return dev->ethtool_ops->set_link_ksettings(dev,
 833                                                             &link_ksettings);
 834         }
 835
 836         /* legacy %ethtool_cmd API */
 837
 838         /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
 839          * disappears internally
 840          */
 841
 842         if (!dev->ethtool_ops->set_settings)
 843                 return -EOPNOTSUPP;
 844
 845         return dev->ethtool_ops->set_settings(dev, &cmd);
 846 }
 847
 848 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 849                                                   void __user *useraddr)
 850 {
 851         struct ethtool_drvinfo info;
 852         const struct ethtool_ops *ops = dev->ethtool_ops;
 853
 854         memset(&info, 0, sizeof(info));
 855         info.cmd = ETHTOOL_GDRVINFO;
 856         if (ops->get_drvinfo) {
 857                 ops->get_drvinfo(dev, &info);
 858         } else if (dev->dev.parent && dev->dev.parent->driver) {
 859                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 860                         sizeof(info.bus_info));
 861                 strlcpy(info.driver, dev->dev.parent->driver->name,
 862                         sizeof(info.driver));
 863         } else {
 864                 return -EOPNOTSUPP;
 865         }
 866
 867         /*
 868          * this method of obtaining string set info is deprecated;
 869          * Use ETHTOOL_GSSET_INFO instead.
 870          */
 871         if (ops->get_sset_count) {
 872                 int rc;
 873
 874                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 875                 if (rc >= 0)
 876                         info.testinfo_len = rc;
 877                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 878                 if (rc >= 0)
 879                         info.n_stats = rc;
 880                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 881                 if (rc >= 0)
 882                         info.n_priv_flags = rc;
 883         }
 884         if (ops->get_regs_len)
 885                 info.regdump_len = ops->get_regs_len(dev);
 886         if (ops->get_eeprom_len)
 887                 info.eedump_len = ops->get_eeprom_len(dev);
 888
 889         if (copy_to_user(useraddr, &info, sizeof(info)))
 890                 return -EFAULT;
 891         return 0;
 892 }
 893
 894 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 895                                                     void __user *useraddr)
 896 {
 897         struct ethtool_sset_info info;
 898         u64 sset_mask;
 899         int i, idx = 0, n_bits = 0, ret, rc;
 900         u32 *info_buf = NULL;
 901
 902         if (copy_from_user(&info, useraddr, sizeof(info)))
 903                 return -EFAULT;
 904
 905         /* store copy of mask, because we zero struct later on */
 906         sset_mask = info.sset_mask;
 907         if (!sset_mask)
 908                 return 0;
 909
 910         /* calculate size of return buffer */
 911         n_bits = hweight64(sset_mask);
 912
 913         memset(&info, 0, sizeof(info));
 914         info.cmd = ETHTOOL_GSSET_INFO;
 915
 916         info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
 917         if (!info_buf)
 918                 return -ENOMEM;
 919
 920         /*
 921          * fill return buffer based on input bitmask and successful
 922          * get_sset_count return
 923          */
 924         for (i = 0; i < 64; i++) {
 925                 if (!(sset_mask & (1ULL << i)))
 926                         continue;
 927
 928                 rc = __ethtool_get_sset_count(dev, i);
 929                 if (rc >= 0) {
 930                         info.sset_mask |= (1ULL << i);
 931                         info_buf[idx++] = rc;
 932                 }
 933         }
 934
 935         ret = -EFAULT;
 936         if (copy_to_user(useraddr, &info, sizeof(info)))
 937                 goto out;
 938
 939         useraddr += offsetof(struct ethtool_sset_info, data);
 940         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 941                 goto out;
 942
 943         ret = 0;
 944
 945 out:
 946         kfree(info_buf);
 947         return ret;
 948 }
 949
 950 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 951                                                 u32 cmd, void __user *useraddr)
 952 {
 953         struct ethtool_rxnfc info;
 954         size_t info_size = sizeof(info);
 955         int rc;
 956
 957         if (!dev->ethtool_ops->set_rxnfc)
 958                 return -EOPNOTSUPP;
 959
 960         /* struct ethtool_rxnfc was originally defined for
 961          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 962          * members.  User-space might still be using that
 963          * definition. */
 964         if (cmd == ETHTOOL_SRXFH)
 965                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 966                              sizeof(info.data));
 967
 968         if (copy_from_user(&info, useraddr, info_size))
 969                 return -EFAULT;
 970
 971         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 972         if (rc)
 973                 return rc;
 974
 975         if (cmd == ETHTOOL_SRXCLSRLINS &&
 976             copy_to_user(useraddr, &info, info_size))
 977                 return -EFAULT;
 978
 979         return 0;
 980 }
 981
 982 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 983                                                 u32 cmd, void __user *useraddr)
 984 {
 985         struct ethtool_rxnfc info;
 986         size_t info_size = sizeof(info);
 987         const struct ethtool_ops *ops = dev->ethtool_ops;
 988         int ret;
 989         void *rule_buf = NULL;
 990
 991         if (!ops->get_rxnfc)
 992                 return -EOPNOTSUPP;
 993
 994         /* struct ethtool_rxnfc was originally defined for
 995          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 996          * members.  User-space might still be using that
 997          * definition. */
 998         if (cmd == ETHTOOL_GRXFH)
 999                 info_size = (offsetof(struct ethtool_rxnfc, data) +
1000                              sizeof(info.data));
1001
1002         if (copy_from_user(&info, useraddr, info_size))
1003                 return -EFAULT;
1004
1005         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1006                 if (info.rule_cnt > 0) {
1007                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1008                                 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1009                                                    GFP_USER);
1010                         if (!rule_buf)
1011                                 return -ENOMEM;
1012                 }
1013         }
1014
1015         ret = ops->get_rxnfc(dev, &info, rule_buf);
1016         if (ret < 0)
1017                 goto err_out;
1018
1019         ret = -EFAULT;
1020         if (copy_to_user(useraddr, &info, info_size))
1021                 goto err_out;
1022
1023         if (rule_buf) {
1024                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1025                 if (copy_to_user(useraddr, rule_buf,
1026                                  info.rule_cnt * sizeof(u32)))
1027                         goto err_out;
1028         }
1029         ret = 0;
1030
1031 err_out:
1032         kfree(rule_buf);
1033
1034         return ret;
1035 }
1036
1037 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1038                                         struct ethtool_rxnfc *rx_rings,
1039                                         u32 size)
1040 {
1041         int i;
1042
1043         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1044                 return -EFAULT;
1045
1046         /* Validate ring indices */
1047         for (i = 0; i < size; i++)
1048                 if (indir[i] >= rx_rings->data)
1049                         return -EINVAL;
1050
1051         return 0;
1052 }
1053
1054 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1055
1056 void netdev_rss_key_fill(void *buffer, size_t len)
1057 {
1058         BUG_ON(len > sizeof(netdev_rss_key));
1059         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1060         memcpy(buffer, netdev_rss_key, len);
1061 }
1062 EXPORT_SYMBOL(netdev_rss_key_fill);
1063
1064 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1065 {
1066         u32 dev_size, current_max = 0;
1067         u32 *indir;
1068         int ret;
1069
1070         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1071             !dev->ethtool_ops->get_rxfh)
1072                 return -EOPNOTSUPP;
1073         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1074         if (dev_size == 0)
1075                 return -EOPNOTSUPP;
1076
1077         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1078         if (!indir)
1079                 return -ENOMEM;
1080
1081         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1082         if (ret)
1083                 goto out;
1084
1085         while (dev_size--)
1086                 current_max = max(current_max, indir[dev_size]);
1087
1088         *max = current_max;
1089
1090 out:
1091         kfree(indir);
1092         return ret;
1093 }
1094
1095 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1096                                                      void __user *useraddr)
1097 {
1098         u32 user_size, dev_size;
1099         u32 *indir;
1100         int ret;
1101
1102         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1103             !dev->ethtool_ops->get_rxfh)
1104                 return -EOPNOTSUPP;
1105         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1106         if (dev_size == 0)
1107                 return -EOPNOTSUPP;
1108
1109         if (copy_from_user(&user_size,
1110                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1111                            sizeof(user_size)))
1112                 return -EFAULT;
1113
1114         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1115                          &dev_size, sizeof(dev_size)))
1116                 return -EFAULT;
1117
1118         /* If the user buffer size is 0, this is just a query for the
1119          * device table size.  Otherwise, if it's smaller than the
1120          * device table size it's an error.
1121          */
1122         if (user_size < dev_size)
1123                 return user_size == 0 ? 0 : -EINVAL;
1124
1125         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1126         if (!indir)
1127                 return -ENOMEM;
1128
1129         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1130         if (ret)
1131                 goto out;
1132
1133         if (copy_to_user(useraddr +
1134                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1135                          indir, dev_size * sizeof(indir[0])))
1136                 ret = -EFAULT;
1137
1138 out:
1139         kfree(indir);
1140         return ret;
1141 }
1142
1143 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1144                                                      void __user *useraddr)
1145 {
1146         struct ethtool_rxnfc rx_rings;
1147         u32 user_size, dev_size, i;
1148         u32 *indir;
1149         const struct ethtool_ops *ops = dev->ethtool_ops;
1150         int ret;
1151         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1152
1153         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1154             !ops->get_rxnfc)
1155                 return -EOPNOTSUPP;
1156
1157         dev_size = ops->get_rxfh_indir_size(dev);
1158         if (dev_size == 0)
1159                 return -EOPNOTSUPP;
1160
1161         if (copy_from_user(&user_size,
1162                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1163                            sizeof(user_size)))
1164                 return -EFAULT;
1165
1166         if (user_size != 0 && user_size != dev_size)
1167                 return -EINVAL;
1168
1169         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1170         if (!indir)
1171                 return -ENOMEM;
1172
1173         rx_rings.cmd = ETHTOOL_GRXRINGS;
1174         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1175         if (ret)
1176                 goto out;
1177
1178         if (user_size == 0) {
1179                 for (i = 0; i < dev_size; i++)
1180                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1181         } else {
1182                 ret = ethtool_copy_validate_indir(indir,
1183                                                   useraddr + ringidx_offset,
1184                                                   &rx_rings,
1185                                                   dev_size);
1186                 if (ret)
1187                         goto out;
1188         }
1189
1190         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1191         if (ret)
1192                 goto out;
1193
1194         /* indicate whether rxfh was set to default */
1195         if (user_size == 0)
1196                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1197         else
1198                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1199
1200 out:
1201         kfree(indir);
1202         return ret;
1203 }
1204
1205 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1206                                                void __user *useraddr)
1207 {
1208         int ret;
1209         const struct ethtool_ops *ops = dev->ethtool_ops;
1210         u32 user_indir_size, user_key_size;
1211         u32 dev_indir_size = 0, dev_key_size = 0;
1212         struct ethtool_rxfh rxfh;
1213         u32 total_size;
1214         u32 indir_bytes;
1215         u32 *indir = NULL;
1216         u8 dev_hfunc = 0;
1217         u8 *hkey = NULL;
1218         u8 *rss_config;
1219
1220         if (!ops->get_rxfh)
1221                 return -EOPNOTSUPP;
1222
1223         if (ops->get_rxfh_indir_size)
1224                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1225         if (ops->get_rxfh_key_size)
1226                 dev_key_size = ops->get_rxfh_key_size(dev);
1227
1228         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1229                 return -EFAULT;
1230         user_indir_size = rxfh.indir_size;
1231         user_key_size = rxfh.key_size;
1232
1233         /* Check that reserved fields are 0 for now */
1234         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1235             rxfh.rsvd8[2] || rxfh.rsvd32)
1236                 return -EINVAL;
1237
1238         rxfh.indir_size = dev_indir_size;
1239         rxfh.key_size = dev_key_size;
1240         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1241                 return -EFAULT;
1242
1243         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1244             (user_key_size && (user_key_size != dev_key_size)))
1245                 return -EINVAL;
1246
1247         indir_bytes = user_indir_size * sizeof(indir[0]);
1248         total_size = indir_bytes + user_key_size;
1249         rss_config = kzalloc(total_size, GFP_USER);
1250         if (!rss_config)
1251                 return -ENOMEM;
1252
1253         if (user_indir_size)
1254                 indir = (u32 *)rss_config;
1255
1256         if (user_key_size)
1257                 hkey = rss_config + indir_bytes;
1258
1259         ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1260         if (ret)
1261                 goto out;
1262
1263         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1264                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1265                 ret = -EFAULT;
1266         } else if (copy_to_user(useraddr +
1267                               offsetof(struct ethtool_rxfh, rss_config[0]),
1268                               rss_config, total_size)) {
1269                 ret = -EFAULT;
1270         }
1271 out:
1272         kfree(rss_config);
1273
1274         return ret;
1275 }
1276
1277 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1278                                                void __user *useraddr)
1279 {
1280         int ret;
1281         const struct ethtool_ops *ops = dev->ethtool_ops;
1282         struct ethtool_rxnfc rx_rings;
1283         struct ethtool_rxfh rxfh;
1284         u32 dev_indir_size = 0, dev_key_size = 0, i;
1285         u32 *indir = NULL, indir_bytes = 0;
1286         u8 *hkey = NULL;
1287         u8 *rss_config;
1288         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1289
1290         if (!ops->get_rxnfc || !ops->set_rxfh)
1291                 return -EOPNOTSUPP;
1292
1293         if (ops->get_rxfh_indir_size)
1294                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1295         if (ops->get_rxfh_key_size)
1296                 dev_key_size = ops->get_rxfh_key_size(dev);
1297
1298         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1299                 return -EFAULT;
1300
1301         /* Check that reserved fields are 0 for now */
1302         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1303             rxfh.rsvd8[2] || rxfh.rsvd32)
1304                 return -EINVAL;
1305
1306         /* If either indir, hash key or function is valid, proceed further.
1307          * Must request at least one change: indir size, hash key or function.
1308          */
1309         if ((rxfh.indir_size &&
1310              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1311              rxfh.indir_size != dev_indir_size) ||
1312             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1313             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1314              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1315                 return -EINVAL;
1316
1317         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1318                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1319
1320         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1321         if (!rss_config)
1322                 return -ENOMEM;
1323
1324         rx_rings.cmd = ETHTOOL_GRXRINGS;
1325         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1326         if (ret)
1327                 goto out;
1328
1329         /* rxfh.indir_size == 0 means reset the indir table to default.
1330          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1331          */
1332         if (rxfh.indir_size &&
1333             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1334                 indir = (u32 *)rss_config;
1335                 ret = ethtool_copy_validate_indir(indir,
1336                                                   useraddr + rss_cfg_offset,
1337                                                   &rx_rings,
1338                                                   rxfh.indir_size);
1339                 if (ret)
1340                         goto out;
1341         } else if (rxfh.indir_size == 0) {
1342                 indir = (u32 *)rss_config;
1343                 for (i = 0; i < dev_indir_size; i++)
1344                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1345         }
1346
1347         if (rxfh.key_size) {
1348                 hkey = rss_config + indir_bytes;
1349                 if (copy_from_user(hkey,
1350                                    useraddr + rss_cfg_offset + indir_bytes,
1351                                    rxfh.key_size)) {
1352                         ret = -EFAULT;
1353                         goto out;
1354                 }
1355         }
1356
1357         ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1358         if (ret)
1359                 goto out;
1360
1361         /* indicate whether rxfh was set to default */
1362         if (rxfh.indir_size == 0)
1363                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1364         else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1365                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1366
1367 out:
1368         kfree(rss_config);
1369         return ret;
1370 }
1371
1372 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1373 {
1374         struct ethtool_regs regs;
1375         const struct ethtool_ops *ops = dev->ethtool_ops;
1376         void *regbuf;
1377         int reglen, ret;
1378
1379         if (!ops->get_regs || !ops->get_regs_len)
1380                 return -EOPNOTSUPP;
1381
1382         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1383                 return -EFAULT;
1384
1385         reglen = ops->get_regs_len(dev);
1386         if (regs.len > reglen)
1387                 regs.len = reglen;
1388
1389         regbuf = vzalloc(reglen);
1390         if (reglen && !regbuf)
1391                 return -ENOMEM;
1392
1393         ops->get_regs(dev, &regs, regbuf);
1394
1395         ret = -EFAULT;
1396         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1397                 goto out;
1398         useraddr += offsetof(struct ethtool_regs, data);
1399         if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1400                 goto out;
1401         ret = 0;
1402
1403  out:
1404         vfree(regbuf);
1405         return ret;
1406 }
1407
1408 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1409 {
1410         struct ethtool_value reset;
1411         int ret;
1412
1413         if (!dev->ethtool_ops->reset)
1414                 return -EOPNOTSUPP;
1415
1416         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1417                 return -EFAULT;
1418
1419         ret = dev->ethtool_ops->reset(dev, &reset.data);
1420         if (ret)
1421                 return ret;
1422
1423         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1424                 return -EFAULT;
1425         return 0;
1426 }
1427
1428 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1429 {
1430         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1431
1432         if (!dev->ethtool_ops->get_wol)
1433                 return -EOPNOTSUPP;
1434
1435         dev->ethtool_ops->get_wol(dev, &wol);
1436
1437         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1438                 return -EFAULT;
1439         return 0;
1440 }
1441
1442 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1443 {
1444         struct ethtool_wolinfo wol;
1445
1446         if (!dev->ethtool_ops->set_wol)
1447                 return -EOPNOTSUPP;
1448
1449         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1450                 return -EFAULT;
1451
1452         return dev->ethtool_ops->set_wol(dev, &wol);
1453 }
1454
1455 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1456 {
1457         struct ethtool_eee edata;
1458         int rc;
1459
1460         if (!dev->ethtool_ops->get_eee)
1461                 return -EOPNOTSUPP;
1462
1463         memset(&edata, 0, sizeof(struct ethtool_eee));
1464         edata.cmd = ETHTOOL_GEEE;
1465         rc = dev->ethtool_ops->get_eee(dev, &edata);
1466
1467         if (rc)
1468                 return rc;
1469
1470         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1471                 return -EFAULT;
1472
1473         return 0;
1474 }
1475
1476 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1477 {
1478         struct ethtool_eee edata;
1479
1480         if (!dev->ethtool_ops->set_eee)
1481                 return -EOPNOTSUPP;
1482
1483         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1484                 return -EFAULT;
1485
1486         return dev->ethtool_ops->set_eee(dev, &edata);
1487 }
1488
1489 static int ethtool_nway_reset(struct net_device *dev)
1490 {
1491         if (!dev->ethtool_ops->nway_reset)
1492                 return -EOPNOTSUPP;
1493
1494         return dev->ethtool_ops->nway_reset(dev);
1495 }
1496
1497 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1498 {
1499         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1500
1501         if (!dev->ethtool_ops->get_link)
1502                 return -EOPNOTSUPP;
1503
1504         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1505
1506         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1507                 return -EFAULT;
1508         return 0;
1509 }
1510
1511 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1512                                   int (*getter)(struct net_device *,
1513                                                 struct ethtool_eeprom *, u8 *),
1514                                   u32 total_len)
1515 {
1516         struct ethtool_eeprom eeprom;
1517         void __user *userbuf = useraddr + sizeof(eeprom);
1518         u32 bytes_remaining;
1519         u8 *data;
1520         int ret = 0;
1521
1522         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1523                 return -EFAULT;
1524
1525         /* Check for wrap and zero */
1526         if (eeprom.offset + eeprom.len <= eeprom.offset)
1527                 return -EINVAL;
1528
1529         /* Check for exceeding total eeprom len */
1530         if (eeprom.offset + eeprom.len > total_len)
1531                 return -EINVAL;
1532
1533         data = kmalloc(PAGE_SIZE, GFP_USER);
1534         if (!data)
1535                 return -ENOMEM;
1536
1537         bytes_remaining = eeprom.len;
1538         while (bytes_remaining > 0) {
1539                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1540
1541                 ret = getter(dev, &eeprom, data);
1542                 if (ret)
1543                         break;
1544                 if (copy_to_user(userbuf, data, eeprom.len)) {
1545                         ret = -EFAULT;
1546                         break;
1547                 }
1548                 userbuf += eeprom.len;
1549                 eeprom.offset += eeprom.len;
1550                 bytes_remaining -= eeprom.len;
1551         }
1552
1553         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1554         eeprom.offset -= eeprom.len;
1555         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1556                 ret = -EFAULT;
1557
1558         kfree(data);
1559         return ret;
1560 }
1561
1562 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1563 {
1564         const struct ethtool_ops *ops = dev->ethtool_ops;
1565
1566         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1567             !ops->get_eeprom_len(dev))
1568                 return -EOPNOTSUPP;
1569
1570         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1571                                       ops->get_eeprom_len(dev));
1572 }
1573
1574 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1575 {
1576         struct ethtool_eeprom eeprom;
1577         const struct ethtool_ops *ops = dev->ethtool_ops;
1578         void __user *userbuf = useraddr + sizeof(eeprom);
1579         u32 bytes_remaining;
1580         u8 *data;
1581         int ret = 0;
1582
1583         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1584             !ops->get_eeprom_len(dev))
1585                 return -EOPNOTSUPP;
1586
1587         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1588                 return -EFAULT;
1589
1590         /* Check for wrap and zero */
1591         if (eeprom.offset + eeprom.len <= eeprom.offset)
1592                 return -EINVAL;
1593
1594         /* Check for exceeding total eeprom len */
1595         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1596                 return -EINVAL;
1597
1598         data = kmalloc(PAGE_SIZE, GFP_USER);
1599         if (!data)
1600                 return -ENOMEM;
1601
1602         bytes_remaining = eeprom.len;
1603         while (bytes_remaining > 0) {
1604                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1605
1606                 if (copy_from_user(data, userbuf, eeprom.len)) {
1607                         ret = -EFAULT;
1608                         break;
1609                 }
1610                 ret = ops->set_eeprom(dev, &eeprom, data);
1611                 if (ret)
1612                         break;
1613                 userbuf += eeprom.len;
1614                 eeprom.offset += eeprom.len;
1615                 bytes_remaining -= eeprom.len;
1616         }
1617
1618         kfree(data);
1619         return ret;
1620 }
1621
1622 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1623                                                    void __user *useraddr)
1624 {
1625         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1626
1627         if (!dev->ethtool_ops->get_coalesce)
1628                 return -EOPNOTSUPP;
1629
1630         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1631
1632         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1633                 return -EFAULT;
1634         return 0;
1635 }
1636
1637 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1638                                                    void __user *useraddr)
1639 {
1640         struct ethtool_coalesce coalesce;
1641
1642         if (!dev->ethtool_ops->set_coalesce)
1643                 return -EOPNOTSUPP;
1644
1645         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1646                 return -EFAULT;
1647
1648         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1649 }
1650
1651 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1652 {
1653         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1654
1655         if (!dev->ethtool_ops->get_ringparam)
1656                 return -EOPNOTSUPP;
1657
1658         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1659
1660         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1661                 return -EFAULT;
1662         return 0;
1663 }
1664
1665 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1666 {
1667         struct ethtool_ringparam ringparam;
1668
1669         if (!dev->ethtool_ops->set_ringparam)
1670                 return -EOPNOTSUPP;
1671
1672         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1673                 return -EFAULT;
1674
1675         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1676 }
1677
1678 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1679                                                    void __user *useraddr)
1680 {
1681         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1682
1683         if (!dev->ethtool_ops->get_channels)
1684                 return -EOPNOTSUPP;
1685
1686         dev->ethtool_ops->get_channels(dev, &channels);
1687
1688         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1689                 return -EFAULT;
1690         return 0;
1691 }
1692
1693 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1694                                                    void __user *useraddr)
1695 {
1696         struct ethtool_channels channels, max;
1697         u32 max_rx_in_use = 0;
1698
1699         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1700                 return -EOPNOTSUPP;
1701
1702         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1703                 return -EFAULT;
1704
1705         dev->ethtool_ops->get_channels(dev, &max);
1706
1707         /* ensure new counts are within the maximums */
1708         if ((channels.rx_count > max.max_rx) ||
1709             (channels.tx_count > max.max_tx) ||
1710             (channels.combined_count > max.max_combined) ||
1711             (channels.other_count > max.max_other))
1712                 return -EINVAL;
1713
1714         /* ensure the new Rx count fits within the configured Rx flow
1715          * indirection table settings */
1716         if (netif_is_rxfh_configured(dev) &&
1717             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1718             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1719             return -EINVAL;
1720
1721         return dev->ethtool_ops->set_channels(dev, &channels);
1722 }
1723
1724 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1725 {
1726         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1727
1728         if (!dev->ethtool_ops->get_pauseparam)
1729                 return -EOPNOTSUPP;
1730
1731         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1732
1733         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1734                 return -EFAULT;
1735         return 0;
1736 }
1737
1738 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1739 {
1740         struct ethtool_pauseparam pauseparam;
1741
1742         if (!dev->ethtool_ops->set_pauseparam)
1743                 return -EOPNOTSUPP;
1744
1745         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1746                 return -EFAULT;
1747
1748         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1749 }
1750
1751 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1752 {
1753         struct ethtool_test test;
1754         const struct ethtool_ops *ops = dev->ethtool_ops;
1755         u64 *data;
1756         int ret, test_len;
1757
1758         if (!ops->self_test || !ops->get_sset_count)
1759                 return -EOPNOTSUPP;
1760
1761         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1762         if (test_len < 0)
1763                 return test_len;
1764         WARN_ON(test_len == 0);
1765
1766         if (copy_from_user(&test, useraddr, sizeof(test)))
1767                 return -EFAULT;
1768
1769         test.len = test_len;
1770         data = kmalloc(test_len * sizeof(u64), GFP_USER);
1771         if (!data)
1772                 return -ENOMEM;
1773
1774         ops->self_test(dev, &test, data);
1775
1776         ret = -EFAULT;
1777         if (copy_to_user(useraddr, &test, sizeof(test)))
1778                 goto out;
1779         useraddr += sizeof(test);
1780         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1781                 goto out;
1782         ret = 0;
1783
1784  out:
1785         kfree(data);
1786         return ret;
1787 }
1788
1789 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1790 {
1791         struct ethtool_gstrings gstrings;
1792         u8 *data;
1793         int ret;
1794
1795         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1796                 return -EFAULT;
1797
1798         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1799         if (ret < 0)
1800                 return ret;
1801
1802         gstrings.len = ret;
1803
1804         data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1805         if (!data)
1806                 return -ENOMEM;
1807
1808         __ethtool_get_strings(dev, gstrings.string_set, data);
1809
1810         ret = -EFAULT;
1811         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1812                 goto out;
1813         useraddr += sizeof(gstrings);
1814         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1815                 goto out;
1816         ret = 0;
1817
1818 out:
1819         kfree(data);
1820         return ret;
1821 }
1822
1823 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1824 {
1825         struct ethtool_value id;
1826         static bool busy;
1827         const struct ethtool_ops *ops = dev->ethtool_ops;
1828         int rc;
1829
1830         if (!ops->set_phys_id)
1831                 return -EOPNOTSUPP;
1832
1833         if (busy)
1834                 return -EBUSY;
1835
1836         if (copy_from_user(&id, useraddr, sizeof(id)))
1837                 return -EFAULT;
1838
1839         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1840         if (rc < 0)
1841                 return rc;
1842
1843         /* Drop the RTNL lock while waiting, but prevent reentry or
1844          * removal of the device.
1845          */
1846         busy = true;
1847         dev_hold(dev);
1848         rtnl_unlock();
1849
1850         if (rc == 0) {
1851                 /* Driver will handle this itself */
1852                 schedule_timeout_interruptible(
1853                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1854         } else {
1855                 /* Driver expects to be called at twice the frequency in rc */
1856                 int n = rc * 2, i, interval = HZ / n;
1857
1858                 /* Count down seconds */
1859                 do {
1860                         /* Count down iterations per second */
1861                         i = n;
1862                         do {
1863                                 rtnl_lock();
1864                                 rc = ops->set_phys_id(dev,
1865                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1866                                 rtnl_unlock();
1867                                 if (rc)
1868                                         break;
1869                                 schedule_timeout_interruptible(interval);
1870                         } while (!signal_pending(current) && --i != 0);
1871                 } while (!signal_pending(current) &&
1872                          (id.data == 0 || --id.data != 0));
1873         }
1874
1875         rtnl_lock();
1876         dev_put(dev);
1877         busy = false;
1878
1879         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1880         return rc;
1881 }
1882
1883 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1884 {
1885         struct ethtool_stats stats;
1886         const struct ethtool_ops *ops = dev->ethtool_ops;
1887         u64 *data;
1888         int ret, n_stats;
1889
1890         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1891                 return -EOPNOTSUPP;
1892
1893         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1894         if (n_stats < 0)
1895                 return n_stats;
1896         WARN_ON(n_stats == 0);
1897
1898         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1899                 return -EFAULT;
1900
1901         stats.n_stats = n_stats;
1902         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1903         if (!data)
1904                 return -ENOMEM;
1905
1906         ops->get_ethtool_stats(dev, &stats, data);
1907
1908         ret = -EFAULT;
1909         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1910                 goto out;
1911         useraddr += sizeof(stats);
1912         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1913                 goto out;
1914         ret = 0;
1915
1916  out:
1917         kfree(data);
1918         return ret;
1919 }
1920
1921 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1922 {
1923         struct ethtool_stats stats;
1924         struct phy_device *phydev = dev->phydev;
1925         u64 *data;
1926         int ret, n_stats;
1927
1928         if (!phydev)
1929                 return -EOPNOTSUPP;
1930
1931         n_stats = phy_get_sset_count(phydev);
1932
1933         if (n_stats < 0)
1934                 return n_stats;
1935         WARN_ON(n_stats == 0);
1936
1937         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1938                 return -EFAULT;
1939
1940         stats.n_stats = n_stats;
1941         data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1942         if (!data)
1943                 return -ENOMEM;
1944
1945         mutex_lock(&phydev->lock);
1946         phydev->drv->get_stats(phydev, &stats, data);
1947         mutex_unlock(&phydev->lock);
1948
1949         ret = -EFAULT;
1950         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1951                 goto out;
1952         useraddr += sizeof(stats);
1953         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1954                 goto out;
1955         ret = 0;
1956
1957  out:
1958         kfree(data);
1959         return ret;
1960 }
1961
1962 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1963 {
1964         struct ethtool_perm_addr epaddr;
1965
1966         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1967                 return -EFAULT;
1968
1969         if (epaddr.size < dev->addr_len)
1970                 return -ETOOSMALL;
1971         epaddr.size = dev->addr_len;
1972
1973         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1974                 return -EFAULT;
1975         useraddr += sizeof(epaddr);
1976         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1977                 return -EFAULT;
1978         return 0;
1979 }
1980
1981 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1982                              u32 cmd, u32 (*actor)(struct net_device *))
1983 {
1984         struct ethtool_value edata = { .cmd = cmd };
1985
1986         if (!actor)
1987                 return -EOPNOTSUPP;
1988
1989         edata.data = actor(dev);
1990
1991         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1992                 return -EFAULT;
1993         return 0;
1994 }
1995
1996 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1997                              void (*actor)(struct net_device *, u32))
1998 {
1999         struct ethtool_value edata;
2000
2001         if (!actor)
2002                 return -EOPNOTSUPP;
2003
2004         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2005                 return -EFAULT;
2006
2007         actor(dev, edata.data);
2008         return 0;
2009 }
2010
2011 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2012                              int (*actor)(struct net_device *, u32))
2013 {
2014         struct ethtool_value edata;
2015
2016         if (!actor)
2017                 return -EOPNOTSUPP;
2018
2019         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2020                 return -EFAULT;
2021
2022         return actor(dev, edata.data);
2023 }
2024
2025 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2026                                                    char __user *useraddr)
2027 {
2028         struct ethtool_flash efl;
2029
2030         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2031                 return -EFAULT;
2032
2033         if (!dev->ethtool_ops->flash_device)
2034                 return -EOPNOTSUPP;
2035
2036         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2037
2038         return dev->ethtool_ops->flash_device(dev, &efl);
2039 }
2040
2041 static int ethtool_set_dump(struct net_device *dev,
2042                         void __user *useraddr)
2043 {
2044         struct ethtool_dump dump;
2045
2046         if (!dev->ethtool_ops->set_dump)
2047                 return -EOPNOTSUPP;
2048
2049         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2050                 return -EFAULT;
2051
2052         return dev->ethtool_ops->set_dump(dev, &dump);
2053 }
2054
2055 static int ethtool_get_dump_flag(struct net_device *dev,
2056                                 void __user *useraddr)
2057 {
2058         int ret;
2059         struct ethtool_dump dump;
2060         const struct ethtool_ops *ops = dev->ethtool_ops;
2061
2062         if (!ops->get_dump_flag)
2063                 return -EOPNOTSUPP;
2064
2065         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2066                 return -EFAULT;
2067
2068         ret = ops->get_dump_flag(dev, &dump);
2069         if (ret)
2070                 return ret;
2071
2072         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2073                 return -EFAULT;
2074         return 0;
2075 }
2076
2077 static int ethtool_get_dump_data(struct net_device *dev,
2078                                 void __user *useraddr)
2079 {
2080         int ret;
2081         __u32 len;
2082         struct ethtool_dump dump, tmp;
2083         const struct ethtool_ops *ops = dev->ethtool_ops;
2084         void *data = NULL;
2085
2086         if (!ops->get_dump_data || !ops->get_dump_flag)
2087                 return -EOPNOTSUPP;
2088
2089         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2090                 return -EFAULT;
2091
2092         memset(&tmp, 0, sizeof(tmp));
2093         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2094         ret = ops->get_dump_flag(dev, &tmp);
2095         if (ret)
2096                 return ret;
2097
2098         len = min(tmp.len, dump.len);
2099         if (!len)
2100                 return -EFAULT;
2101
2102         /* Don't ever let the driver think there's more space available
2103          * than it requested with .get_dump_flag().
2104          */
2105         dump.len = len;
2106
2107         /* Always allocate enough space to hold the whole thing so that the
2108          * driver does not need to check the length and bother with partial
2109          * dumping.
2110          */
2111         data = vzalloc(tmp.len);
2112         if (!data)
2113                 return -ENOMEM;
2114         ret = ops->get_dump_data(dev, &dump, data);
2115         if (ret)
2116                 goto out;
2117
2118         /* There are two sane possibilities:
2119          * 1. The driver's .get_dump_data() does not touch dump.len.
2120          * 2. Or it may set dump.len to how much it really writes, which
2121          *    should be tmp.len (or len if it can do a partial dump).
2122          * In any case respond to userspace with the actual length of data
2123          * it's receiving.
2124          */
2125         WARN_ON(dump.len != len && dump.len != tmp.len);
2126         dump.len = len;
2127
2128         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2129                 ret = -EFAULT;
2130                 goto out;
2131         }
2132         useraddr += offsetof(struct ethtool_dump, data);
2133         if (copy_to_user(useraddr, data, len))
2134                 ret = -EFAULT;
2135 out:
2136         vfree(data);
2137         return ret;
2138 }
2139
2140 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2141 {
2142         int err = 0;
2143         struct ethtool_ts_info info;
2144         const struct ethtool_ops *ops = dev->ethtool_ops;
2145         struct phy_device *phydev = dev->phydev;
2146
2147         memset(&info, 0, sizeof(info));
2148         info.cmd = ETHTOOL_GET_TS_INFO;
2149
2150         if (phydev && phydev->drv && phydev->drv->ts_info) {
2151                 err = phydev->drv->ts_info(phydev, &info);
2152         } else if (ops->get_ts_info) {
2153                 err = ops->get_ts_info(dev, &info);
2154         } else {
2155                 info.so_timestamping =
2156                         SOF_TIMESTAMPING_RX_SOFTWARE |
2157                         SOF_TIMESTAMPING_SOFTWARE;
2158                 info.phc_index = -1;
2159         }
2160
2161         if (err)
2162                 return err;
2163
2164         if (copy_to_user(useraddr, &info, sizeof(info)))
2165                 err = -EFAULT;
2166
2167         return err;
2168 }
2169
2170 static int __ethtool_get_module_info(struct net_device *dev,
2171                                      struct ethtool_modinfo *modinfo)
2172 {
2173         const struct ethtool_ops *ops = dev->ethtool_ops;
2174         struct phy_device *phydev = dev->phydev;
2175
2176         if (phydev && phydev->drv && phydev->drv->module_info)
2177                 return phydev->drv->module_info(phydev, modinfo);
2178
2179         if (ops->get_module_info)
2180                 return ops->get_module_info(dev, modinfo);
2181
2182         return -EOPNOTSUPP;
2183 }
2184
2185 static int ethtool_get_module_info(struct net_device *dev,
2186                                    void __user *useraddr)
2187 {
2188         int ret;
2189         struct ethtool_modinfo modinfo;
2190
2191         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2192                 return -EFAULT;
2193
2194         ret = __ethtool_get_module_info(dev, &modinfo);
2195         if (ret)
2196                 return ret;
2197
2198         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2199                 return -EFAULT;
2200
2201         return 0;
2202 }
2203
2204 static int __ethtool_get_module_eeprom(struct net_device *dev,
2205                                        struct ethtool_eeprom *ee, u8 *data)
2206 {
2207         const struct ethtool_ops *ops = dev->ethtool_ops;
2208         struct phy_device *phydev = dev->phydev;
2209
2210         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2211                 return phydev->drv->module_eeprom(phydev, ee, data);
2212
2213         if (ops->get_module_eeprom)
2214                 return ops->get_module_eeprom(dev, ee, data);
2215
2216         return -EOPNOTSUPP;
2217 }
2218
2219 static int ethtool_get_module_eeprom(struct net_device *dev,
2220                                      void __user *useraddr)
2221 {
2222         int ret;
2223         struct ethtool_modinfo modinfo;
2224
2225         ret = __ethtool_get_module_info(dev, &modinfo);
2226         if (ret)
2227                 return ret;
2228
2229         return ethtool_get_any_eeprom(dev, useraddr,
2230                                       __ethtool_get_module_eeprom,
2231                                       modinfo.eeprom_len);
2232 }
2233
2234 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2235 {
2236         switch (tuna->id) {
2237         case ETHTOOL_RX_COPYBREAK:
2238         case ETHTOOL_TX_COPYBREAK:
2239                 if (tuna->len != sizeof(u32) ||
2240                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2241                         return -EINVAL;
2242                 break;
2243         default:
2244                 return -EINVAL;
2245         }
2246
2247         return 0;
2248 }
2249
2250 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2251 {
2252         int ret;
2253         struct ethtool_tunable tuna;
2254         const struct ethtool_ops *ops = dev->ethtool_ops;
2255         void *data;
2256
2257         if (!ops->get_tunable)
2258                 return -EOPNOTSUPP;
2259         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2260                 return -EFAULT;
2261         ret = ethtool_tunable_valid(&tuna);
2262         if (ret)
2263                 return ret;
2264         data = kmalloc(tuna.len, GFP_USER);
2265         if (!data)
2266                 return -ENOMEM;
2267         ret = ops->get_tunable(dev, &tuna, data);
2268         if (ret)
2269                 goto out;
2270         useraddr += sizeof(tuna);
2271         ret = -EFAULT;
2272         if (copy_to_user(useraddr, data, tuna.len))
2273                 goto out;
2274         ret = 0;
2275
2276 out:
2277         kfree(data);
2278         return ret;
2279 }
2280
2281 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2282 {
2283         int ret;
2284         struct ethtool_tunable tuna;
2285         const struct ethtool_ops *ops = dev->ethtool_ops;
2286         void *data;
2287
2288         if (!ops->set_tunable)
2289                 return -EOPNOTSUPP;
2290         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2291                 return -EFAULT;
2292         ret = ethtool_tunable_valid(&tuna);
2293         if (ret)
2294                 return ret;
2295         data = kmalloc(tuna.len, GFP_USER);
2296         if (!data)
2297                 return -ENOMEM;
2298         useraddr += sizeof(tuna);
2299         ret = -EFAULT;
2300         if (copy_from_user(data, useraddr, tuna.len))
2301                 goto out;
2302         ret = ops->set_tunable(dev, &tuna, data);
2303
2304 out:
2305         kfree(data);
2306         return ret;
2307 }
2308
2309 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2310                                           void __user *useraddr,
2311                                           struct ethtool_per_queue_op *per_queue_opt)
2312 {
2313         u32 bit;
2314         int ret;
2315         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2316
2317         if (!dev->ethtool_ops->get_per_queue_coalesce)
2318                 return -EOPNOTSUPP;
2319
2320         useraddr += sizeof(*per_queue_opt);
2321
2322         bitmap_from_u32array(queue_mask,
2323                              MAX_NUM_QUEUE,
2324                              per_queue_opt->queue_mask,
2325                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2326
2327         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2328                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2329
2330                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2331                 if (ret != 0)
2332                         return ret;
2333                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2334                         return -EFAULT;
2335                 useraddr += sizeof(coalesce);
2336         }
2337
2338         return 0;
2339 }
2340
2341 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2342                                           void __user *useraddr,
2343                                           struct ethtool_per_queue_op *per_queue_opt)
2344 {
2345         u32 bit;
2346         int i, ret = 0;
2347         int n_queue;
2348         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2349         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2350
2351         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2352             (!dev->ethtool_ops->get_per_queue_coalesce))
2353                 return -EOPNOTSUPP;
2354
2355         useraddr += sizeof(*per_queue_opt);
2356
2357         bitmap_from_u32array(queue_mask,
2358                              MAX_NUM_QUEUE,
2359                              per_queue_opt->queue_mask,
2360                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2361         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2362         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2363         if (!backup)
2364                 return -ENOMEM;
2365
2366         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2367                 struct ethtool_coalesce coalesce;
2368
2369                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2370                 if (ret != 0)
2371                         goto roll_back;
2372
2373                 tmp++;
2374
2375                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2376                         ret = -EFAULT;
2377                         goto roll_back;
2378                 }
2379
2380                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2381                 if (ret != 0)
2382                         goto roll_back;
2383
2384                 useraddr += sizeof(coalesce);
2385         }
2386
2387 roll_back:
2388         if (ret != 0) {
2389                 tmp = backup;
2390                 for_each_set_bit(i, queue_mask, bit) {
2391                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2392                         tmp++;
2393                 }
2394         }
2395         kfree(backup);
2396
2397         return ret;
2398 }
2399
2400 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2401 {
2402         struct ethtool_per_queue_op per_queue_opt;
2403
2404         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2405                 return -EFAULT;
2406
2407         switch (per_queue_opt.sub_command) {
2408         case ETHTOOL_GCOALESCE:
2409                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2410         case ETHTOOL_SCOALESCE:
2411                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2412         default:
2413                 return -EOPNOTSUPP;
2414         };
2415 }
2416
2417 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2418
2419 int dev_ethtool(struct net *net, struct ifreq *ifr)
2420 {
2421         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2422         void __user *useraddr = ifr->ifr_data;
2423         u32 ethcmd, sub_cmd;
2424         int rc;
2425         netdev_features_t old_features;
2426
2427         if (!dev || !netif_device_present(dev))
2428                 return -ENODEV;
2429
2430         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2431                 return -EFAULT;
2432
2433         if (ethcmd == ETHTOOL_PERQUEUE) {
2434                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2435                         return -EFAULT;
2436         } else {
2437                 sub_cmd = ethcmd;
2438         }
2439         /* Allow some commands to be done by anyone */
2440         switch (sub_cmd) {
2441         case ETHTOOL_GSET:
2442         case ETHTOOL_GDRVINFO:
2443         case ETHTOOL_GMSGLVL:
2444         case ETHTOOL_GLINK:
2445         case ETHTOOL_GCOALESCE:
2446         case ETHTOOL_GRINGPARAM:
2447         case ETHTOOL_GPAUSEPARAM:
2448         case ETHTOOL_GRXCSUM:
2449         case ETHTOOL_GTXCSUM:
2450         case ETHTOOL_GSG:
2451         case ETHTOOL_GSSET_INFO:
2452         case ETHTOOL_GSTRINGS:
2453         case ETHTOOL_GSTATS:
2454         case ETHTOOL_GPHYSTATS:
2455         case ETHTOOL_GTSO:
2456         case ETHTOOL_GPERMADDR:
2457         case ETHTOOL_GUFO:
2458         case ETHTOOL_GGSO:
2459         case ETHTOOL_GGRO:
2460         case ETHTOOL_GFLAGS:
2461         case ETHTOOL_GPFLAGS:
2462         case ETHTOOL_GRXFH:
2463         case ETHTOOL_GRXRINGS:
2464         case ETHTOOL_GRXCLSRLCNT:
2465         case ETHTOOL_GRXCLSRULE:
2466         case ETHTOOL_GRXCLSRLALL:
2467         case ETHTOOL_GRXFHINDIR:
2468         case ETHTOOL_GRSSH:
2469         case ETHTOOL_GFEATURES:
2470         case ETHTOOL_GCHANNELS:
2471         case ETHTOOL_GET_TS_INFO:
2472         case ETHTOOL_GEEE:
2473         case ETHTOOL_GTUNABLE:
2474                 break;
2475         default:
2476                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2477                         return -EPERM;
2478         }
2479
2480         if (dev->ethtool_ops->begin) {
2481                 rc = dev->ethtool_ops->begin(dev);
2482                 if (rc  < 0)
2483                         return rc;
2484         }
2485         old_features = dev->features;
2486
2487         switch (ethcmd) {
2488         case ETHTOOL_GSET:
2489                 rc = ethtool_get_settings(dev, useraddr);
2490                 break;
2491         case ETHTOOL_SSET:
2492                 rc = ethtool_set_settings(dev, useraddr);
2493                 break;
2494         case ETHTOOL_GDRVINFO:
2495                 rc = ethtool_get_drvinfo(dev, useraddr);
2496                 break;
2497         case ETHTOOL_GREGS:
2498                 rc = ethtool_get_regs(dev, useraddr);
2499                 break;
2500         case ETHTOOL_GWOL:
2501                 rc = ethtool_get_wol(dev, useraddr);
2502                 break;
2503         case ETHTOOL_SWOL:
2504                 rc = ethtool_set_wol(dev, useraddr);
2505                 break;
2506         case ETHTOOL_GMSGLVL:
2507                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2508                                        dev->ethtool_ops->get_msglevel);
2509                 break;
2510         case ETHTOOL_SMSGLVL:
2511                 rc = ethtool_set_value_void(dev, useraddr,
2512                                        dev->ethtool_ops->set_msglevel);
2513                 break;
2514         case ETHTOOL_GEEE:
2515                 rc = ethtool_get_eee(dev, useraddr);
2516                 break;
2517         case ETHTOOL_SEEE:
2518                 rc = ethtool_set_eee(dev, useraddr);
2519                 break;
2520         case ETHTOOL_NWAY_RST:
2521                 rc = ethtool_nway_reset(dev);
2522                 break;
2523         case ETHTOOL_GLINK:
2524                 rc = ethtool_get_link(dev, useraddr);
2525                 break;
2526         case ETHTOOL_GEEPROM:
2527                 rc = ethtool_get_eeprom(dev, useraddr);
2528                 break;
2529         case ETHTOOL_SEEPROM:
2530                 rc = ethtool_set_eeprom(dev, useraddr);
2531                 break;
2532         case ETHTOOL_GCOALESCE:
2533                 rc = ethtool_get_coalesce(dev, useraddr);
2534                 break;
2535         case ETHTOOL_SCOALESCE:
2536                 rc = ethtool_set_coalesce(dev, useraddr);
2537                 break;
2538         case ETHTOOL_GRINGPARAM:
2539                 rc = ethtool_get_ringparam(dev, useraddr);
2540                 break;
2541         case ETHTOOL_SRINGPARAM:
2542                 rc = ethtool_set_ringparam(dev, useraddr);
2543                 break;
2544         case ETHTOOL_GPAUSEPARAM:
2545                 rc = ethtool_get_pauseparam(dev, useraddr);
2546                 break;
2547         case ETHTOOL_SPAUSEPARAM:
2548                 rc = ethtool_set_pauseparam(dev, useraddr);
2549                 break;
2550         case ETHTOOL_TEST:
2551                 rc = ethtool_self_test(dev, useraddr);
2552                 break;
2553         case ETHTOOL_GSTRINGS:
2554                 rc = ethtool_get_strings(dev, useraddr);
2555                 break;
2556         case ETHTOOL_PHYS_ID:
2557                 rc = ethtool_phys_id(dev, useraddr);
2558                 break;
2559         case ETHTOOL_GSTATS:
2560                 rc = ethtool_get_stats(dev, useraddr);
2561                 break;
2562         case ETHTOOL_GPERMADDR:
2563                 rc = ethtool_get_perm_addr(dev, useraddr);
2564                 break;
2565         case ETHTOOL_GFLAGS:
2566                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2567                                         __ethtool_get_flags);
2568                 break;
2569         case ETHTOOL_SFLAGS:
2570                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2571                 break;
2572         case ETHTOOL_GPFLAGS:
2573                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2574                                        dev->ethtool_ops->get_priv_flags);
2575                 break;
2576         case ETHTOOL_SPFLAGS:
2577                 rc = ethtool_set_value(dev, useraddr,
2578                                        dev->ethtool_ops->set_priv_flags);
2579                 break;
2580         case ETHTOOL_GRXFH:
2581         case ETHTOOL_GRXRINGS:
2582         case ETHTOOL_GRXCLSRLCNT:
2583         case ETHTOOL_GRXCLSRULE:
2584         case ETHTOOL_GRXCLSRLALL:
2585                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2586                 break;
2587         case ETHTOOL_SRXFH:
2588         case ETHTOOL_SRXCLSRLDEL:
2589         case ETHTOOL_SRXCLSRLINS:
2590                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2591                 break;
2592         case ETHTOOL_FLASHDEV:
2593                 rc = ethtool_flash_device(dev, useraddr);
2594                 break;
2595         case ETHTOOL_RESET:
2596                 rc = ethtool_reset(dev, useraddr);
2597                 break;
2598         case ETHTOOL_GSSET_INFO:
2599                 rc = ethtool_get_sset_info(dev, useraddr);
2600                 break;
2601         case ETHTOOL_GRXFHINDIR:
2602                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2603                 break;
2604         case ETHTOOL_SRXFHINDIR:
2605                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2606                 break;
2607         case ETHTOOL_GRSSH:
2608                 rc = ethtool_get_rxfh(dev, useraddr);
2609                 break;
2610         case ETHTOOL_SRSSH:
2611                 rc = ethtool_set_rxfh(dev, useraddr);
2612                 break;
2613         case ETHTOOL_GFEATURES:
2614                 rc = ethtool_get_features(dev, useraddr);
2615                 break;
2616         case ETHTOOL_SFEATURES:
2617                 rc = ethtool_set_features(dev, useraddr);
2618                 break;
2619         case ETHTOOL_GTXCSUM:
2620         case ETHTOOL_GRXCSUM:
2621         case ETHTOOL_GSG:
2622         case ETHTOOL_GTSO:
2623         case ETHTOOL_GUFO:
2624         case ETHTOOL_GGSO:
2625         case ETHTOOL_GGRO:
2626                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2627                 break;
2628         case ETHTOOL_STXCSUM:
2629         case ETHTOOL_SRXCSUM:
2630         case ETHTOOL_SSG:
2631         case ETHTOOL_STSO:
2632         case ETHTOOL_SUFO:
2633         case ETHTOOL_SGSO:
2634         case ETHTOOL_SGRO:
2635                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2636                 break;
2637         case ETHTOOL_GCHANNELS:
2638                 rc = ethtool_get_channels(dev, useraddr);
2639                 break;
2640         case ETHTOOL_SCHANNELS:
2641                 rc = ethtool_set_channels(dev, useraddr);
2642                 break;
2643         case ETHTOOL_SET_DUMP:
2644                 rc = ethtool_set_dump(dev, useraddr);
2645                 break;
2646         case ETHTOOL_GET_DUMP_FLAG:
2647                 rc = ethtool_get_dump_flag(dev, useraddr);
2648                 break;
2649         case ETHTOOL_GET_DUMP_DATA:
2650                 rc = ethtool_get_dump_data(dev, useraddr);
2651                 break;
2652         case ETHTOOL_GET_TS_INFO:
2653                 rc = ethtool_get_ts_info(dev, useraddr);
2654                 break;
2655         case ETHTOOL_GMODULEINFO:
2656                 rc = ethtool_get_module_info(dev, useraddr);
2657                 break;
2658         case ETHTOOL_GMODULEEEPROM:
2659                 rc = ethtool_get_module_eeprom(dev, useraddr);
2660                 break;
2661         case ETHTOOL_GTUNABLE:
2662                 rc = ethtool_get_tunable(dev, useraddr);
2663                 break;
2664         case ETHTOOL_STUNABLE:
2665                 rc = ethtool_set_tunable(dev, useraddr);
2666                 break;
2667         case ETHTOOL_GPHYSTATS:
2668                 rc = ethtool_get_phy_stats(dev, useraddr);
2669                 break;
2670         case ETHTOOL_PERQUEUE:
2671                 rc = ethtool_set_per_queue(dev, useraddr);
2672                 break;
2673         case ETHTOOL_GLINKSETTINGS:
2674                 rc = ethtool_get_link_ksettings(dev, useraddr);
2675                 break;
2676         case ETHTOOL_SLINKSETTINGS:
2677                 rc = ethtool_set_link_ksettings(dev, useraddr);
2678                 break;
2679         default:
2680                 rc = -EOPNOTSUPP;
2681         }
2682
2683         if (dev->ethtool_ops->complete)
2684                 dev->ethtool_ops->complete(dev);
2685
2686         if (old_features != dev->features)
2687                 netdev_features_change(dev);
2688
2689         return rc;
2690 }