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/sfp.h>
  26 #include <linux/slab.h>
  27 #include <linux/rtnetlink.h>
  28 #include <linux/sched/signal.h>
  29 #include <linux/net.h>
  30
  31 /*
  32  * Some useful ethtool_ops methods that're device independent.
  33  * If we find that all drivers want to do the same thing here,
  34  * we can turn these into dev_() function calls.
  35  */
  36
  37 u32 ethtool_op_get_link(struct net_device *dev)
  38 {
  39         return netif_carrier_ok(dev) ? 1 : 0;
  40 }
  41 EXPORT_SYMBOL(ethtool_op_get_link);
  42
  43 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  44 {
  45         info->so_timestamping =
  46                 SOF_TIMESTAMPING_TX_SOFTWARE |
  47                 SOF_TIMESTAMPING_RX_SOFTWARE |
  48                 SOF_TIMESTAMPING_SOFTWARE;
  49         info->phc_index = -1;
  50         return 0;
  51 }
  52 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  53
  54 /* Handlers for each ethtool command */
  55
  56 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
  57
  58 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
  59         [NETIF_F_SG_BIT] =               "tx-scatter-gather",
  60         [NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
  61         [NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
  62         [NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
  63         [NETIF_F_HIGHDMA_BIT] =          "highdma",
  64         [NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
  65         [NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
  66
  67         [NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
  68         [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
  69         [NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
  70         [NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
  71         [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
  72         [NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
  73         [NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
  74         [NETIF_F_LLTX_BIT] =             "tx-lockless",
  75         [NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
  76         [NETIF_F_GRO_BIT] =              "rx-gro",
  77         [NETIF_F_GRO_HW_BIT] =           "rx-gro-hw",
  78         [NETIF_F_LRO_BIT] =              "rx-lro",
  79
  80         [NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
  81         [NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
  82         [NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
  83         [NETIF_F_TSO_MANGLEID_BIT] =     "tx-tcp-mangleid-segmentation",
  84         [NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
  85         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
  86         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
  87         [NETIF_F_GSO_GRE_CSUM_BIT] =     "tx-gre-csum-segmentation",
  88         [NETIF_F_GSO_IPXIP4_BIT] =       "tx-ipxip4-segmentation",
  89         [NETIF_F_GSO_IPXIP6_BIT] =       "tx-ipxip6-segmentation",
  90         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
  91         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
  92         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
  93         [NETIF_F_GSO_SCTP_BIT] =         "tx-sctp-segmentation",
  94         [NETIF_F_GSO_ESP_BIT] =          "tx-esp-segmentation",
  95
  96         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
  97         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
  98         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
  99         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
 100         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
 101         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
 102         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
 103         [NETIF_F_LOOPBACK_BIT] =         "loopback",
 104         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
 105         [NETIF_F_RXALL_BIT] =            "rx-all",
 106         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
 107         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
 108         [NETIF_F_HW_ESP_BIT] =           "esp-hw-offload",
 109         [NETIF_F_HW_ESP_TX_CSUM_BIT] =   "esp-tx-csum-hw-offload",
 110         [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] =       "rx-udp_tunnel-port-offload",
 111         [NETIF_F_HW_TLS_RECORD_BIT] =   "tls-hw-record",
 112 };
 113
 114 static const char
 115 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
 116         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
 117         [ETH_RSS_HASH_XOR_BIT] =        "xor",
 118         [ETH_RSS_HASH_CRC32_BIT] =      "crc32",
 119 };
 120
 121 static const char
 122 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 123         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 124         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
 125         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
 126         [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
 127 };
 128
 129 static const char
 130 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 131         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 132         [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
 133 };
 134
 135 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 136 {
 137         struct ethtool_gfeatures cmd = {
 138                 .cmd = ETHTOOL_GFEATURES,
 139                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 140         };
 141         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 142         u32 __user *sizeaddr;
 143         u32 copy_size;
 144         int i;
 145
 146         /* in case feature bits run out again */
 147         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
 148
 149         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 150                 features[i].available = (u32)(dev->hw_features >> (32 * i));
 151                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 152                 features[i].active = (u32)(dev->features >> (32 * i));
 153                 features[i].never_changed =
 154                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 155         }
 156
 157         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 158         if (get_user(copy_size, sizeaddr))
 159                 return -EFAULT;
 160
 161         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 162                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 163
 164         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 165                 return -EFAULT;
 166         useraddr += sizeof(cmd);
 167         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 168                 return -EFAULT;
 169
 170         return 0;
 171 }
 172
 173 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 174 {
 175         struct ethtool_sfeatures cmd;
 176         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 177         netdev_features_t wanted = 0, valid = 0;
 178         int i, ret = 0;
 179
 180         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 181                 return -EFAULT;
 182         useraddr += sizeof(cmd);
 183
 184         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 185                 return -EINVAL;
 186
 187         if (copy_from_user(features, useraddr, sizeof(features)))
 188                 return -EFAULT;
 189
 190         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 191                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 192                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 193         }
 194
 195         if (valid & ~NETIF_F_ETHTOOL_BITS)
 196                 return -EINVAL;
 197
 198         if (valid & ~dev->hw_features) {
 199                 valid &= dev->hw_features;
 200                 ret |= ETHTOOL_F_UNSUPPORTED;
 201         }
 202
 203         dev->wanted_features &= ~valid;
 204         dev->wanted_features |= wanted & valid;
 205         __netdev_update_features(dev);
 206
 207         if ((dev->wanted_features ^ dev->features) & valid)
 208                 ret |= ETHTOOL_F_WISH;
 209
 210         return ret;
 211 }
 212
 213 static int phy_get_sset_count(struct phy_device *phydev)
 214 {
 215         int ret;
 216
 217         if (phydev->drv->get_sset_count &&
 218             phydev->drv->get_strings &&
 219             phydev->drv->get_stats) {
 220                 mutex_lock(&phydev->lock);
 221                 ret = phydev->drv->get_sset_count(phydev);
 222                 mutex_unlock(&phydev->lock);
 223
 224                 return ret;
 225         }
 226
 227         return -EOPNOTSUPP;
 228 }
 229
 230 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 231 {
 232         const struct ethtool_ops *ops = dev->ethtool_ops;
 233
 234         if (sset == ETH_SS_FEATURES)
 235                 return ARRAY_SIZE(netdev_features_strings);
 236
 237         if (sset == ETH_SS_RSS_HASH_FUNCS)
 238                 return ARRAY_SIZE(rss_hash_func_strings);
 239
 240         if (sset == ETH_SS_TUNABLES)
 241                 return ARRAY_SIZE(tunable_strings);
 242
 243         if (sset == ETH_SS_PHY_TUNABLES)
 244                 return ARRAY_SIZE(phy_tunable_strings);
 245
 246         if (sset == ETH_SS_PHY_STATS) {
 247                 if (dev->phydev)
 248                         return phy_get_sset_count(dev->phydev);
 249                 else
 250                         return -EOPNOTSUPP;
 251         }
 252
 253         if (ops->get_sset_count && ops->get_strings)
 254                 return ops->get_sset_count(dev, sset);
 255         else
 256                 return -EOPNOTSUPP;
 257 }
 258
 259 static void __ethtool_get_strings(struct net_device *dev,
 260         u32 stringset, u8 *data)
 261 {
 262         const struct ethtool_ops *ops = dev->ethtool_ops;
 263
 264         if (stringset == ETH_SS_FEATURES)
 265                 memcpy(data, netdev_features_strings,
 266                         sizeof(netdev_features_strings));
 267         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 268                 memcpy(data, rss_hash_func_strings,
 269                        sizeof(rss_hash_func_strings));
 270         else if (stringset == ETH_SS_TUNABLES)
 271                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 272         else if (stringset == ETH_SS_PHY_TUNABLES)
 273                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 274         else if (stringset == ETH_SS_PHY_STATS) {
 275                 struct phy_device *phydev = dev->phydev;
 276
 277                 if (phydev) {
 278                         mutex_lock(&phydev->lock);
 279                         phydev->drv->get_strings(phydev, data);
 280                         mutex_unlock(&phydev->lock);
 281                 } else {
 282                         return;
 283                 }
 284         } else
 285                 /* ops->get_strings is valid because checked earlier */
 286                 ops->get_strings(dev, stringset, data);
 287 }
 288
 289 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 290 {
 291         /* feature masks of legacy discrete ethtool ops */
 292
 293         switch (eth_cmd) {
 294         case ETHTOOL_GTXCSUM:
 295         case ETHTOOL_STXCSUM:
 296                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 297         case ETHTOOL_GRXCSUM:
 298         case ETHTOOL_SRXCSUM:
 299                 return NETIF_F_RXCSUM;
 300         case ETHTOOL_GSG:
 301         case ETHTOOL_SSG:
 302                 return NETIF_F_SG;
 303         case ETHTOOL_GTSO:
 304         case ETHTOOL_STSO:
 305                 return NETIF_F_ALL_TSO;
 306         case ETHTOOL_GGSO:
 307         case ETHTOOL_SGSO:
 308                 return NETIF_F_GSO;
 309         case ETHTOOL_GGRO:
 310         case ETHTOOL_SGRO:
 311                 return NETIF_F_GRO;
 312         default:
 313                 BUG();
 314         }
 315 }
 316
 317 static int ethtool_get_one_feature(struct net_device *dev,
 318         char __user *useraddr, u32 ethcmd)
 319 {
 320         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 321         struct ethtool_value edata = {
 322                 .cmd = ethcmd,
 323                 .data = !!(dev->features & mask),
 324         };
 325
 326         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 327                 return -EFAULT;
 328         return 0;
 329 }
 330
 331 static int ethtool_set_one_feature(struct net_device *dev,
 332         void __user *useraddr, u32 ethcmd)
 333 {
 334         struct ethtool_value edata;
 335         netdev_features_t mask;
 336
 337         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 338                 return -EFAULT;
 339
 340         mask = ethtool_get_feature_mask(ethcmd);
 341         mask &= dev->hw_features;
 342         if (!mask)
 343                 return -EOPNOTSUPP;
 344
 345         if (edata.data)
 346                 dev->wanted_features |= mask;
 347         else
 348                 dev->wanted_features &= ~mask;
 349
 350         __netdev_update_features(dev);
 351
 352         return 0;
 353 }
 354
 355 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 356                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 357 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 358                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 359                           NETIF_F_RXHASH)
 360
 361 static u32 __ethtool_get_flags(struct net_device *dev)
 362 {
 363         u32 flags = 0;
 364
 365         if (dev->features & NETIF_F_LRO)
 366                 flags |= ETH_FLAG_LRO;
 367         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 368                 flags |= ETH_FLAG_RXVLAN;
 369         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 370                 flags |= ETH_FLAG_TXVLAN;
 371         if (dev->features & NETIF_F_NTUPLE)
 372                 flags |= ETH_FLAG_NTUPLE;
 373         if (dev->features & NETIF_F_RXHASH)
 374                 flags |= ETH_FLAG_RXHASH;
 375
 376         return flags;
 377 }
 378
 379 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 380 {
 381         netdev_features_t features = 0, changed;
 382
 383         if (data & ~ETH_ALL_FLAGS)
 384                 return -EINVAL;
 385
 386         if (data & ETH_FLAG_LRO)
 387                 features |= NETIF_F_LRO;
 388         if (data & ETH_FLAG_RXVLAN)
 389                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 390         if (data & ETH_FLAG_TXVLAN)
 391                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 392         if (data & ETH_FLAG_NTUPLE)
 393                 features |= NETIF_F_NTUPLE;
 394         if (data & ETH_FLAG_RXHASH)
 395                 features |= NETIF_F_RXHASH;
 396
 397         /* allow changing only bits set in hw_features */
 398         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 399         if (changed & ~dev->hw_features)
 400                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 401
 402         dev->wanted_features =
 403                 (dev->wanted_features & ~changed) | (features & changed);
 404
 405         __netdev_update_features(dev);
 406
 407         return 0;
 408 }
 409
 410 /* Given two link masks, AND them together and save the result in dst. */
 411 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 412                                   struct ethtool_link_ksettings *src)
 413 {
 414         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 415         unsigned int idx = 0;
 416
 417         for (; idx < size; idx++) {
 418                 dst->link_modes.supported[idx] &=
 419                         src->link_modes.supported[idx];
 420                 dst->link_modes.advertising[idx] &=
 421                         src->link_modes.advertising[idx];
 422         }
 423 }
 424 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 425
 426 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 427                                              u32 legacy_u32)
 428 {
 429         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 430         dst[0] = legacy_u32;
 431 }
 432 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 433
 434 /* return false if src had higher bits set. lower bits always updated. */
 435 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 436                                              const unsigned long *src)
 437 {
 438         bool retval = true;
 439
 440         /* TODO: following test will soon always be true */
 441         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 442                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 443
 444                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 445                 bitmap_fill(ext, 32);
 446                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 447                 if (bitmap_intersects(ext, src,
 448                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 449                         /* src mask goes beyond bit 31 */
 450                         retval = false;
 451                 }
 452         }
 453         *legacy_u32 = src[0];
 454         return retval;
 455 }
 456 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 457
 458 /* return false if legacy contained non-0 deprecated fields
 459  * maxtxpkt/maxrxpkt. rest of ksettings always updated
 460  */
 461 static bool
 462 convert_legacy_settings_to_link_ksettings(
 463         struct ethtool_link_ksettings *link_ksettings,
 464         const struct ethtool_cmd *legacy_settings)
 465 {
 466         bool retval = true;
 467
 468         memset(link_ksettings, 0, sizeof(*link_ksettings));
 469
 470         /* This is used to tell users that driver is still using these
 471          * deprecated legacy fields, and they should not use
 472          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
 473          */
 474         if (legacy_settings->maxtxpkt ||
 475             legacy_settings->maxrxpkt)
 476                 retval = false;
 477
 478         ethtool_convert_legacy_u32_to_link_mode(
 479                 link_ksettings->link_modes.supported,
 480                 legacy_settings->supported);
 481         ethtool_convert_legacy_u32_to_link_mode(
 482                 link_ksettings->link_modes.advertising,
 483                 legacy_settings->advertising);
 484         ethtool_convert_legacy_u32_to_link_mode(
 485                 link_ksettings->link_modes.lp_advertising,
 486                 legacy_settings->lp_advertising);
 487         link_ksettings->base.speed
 488                 = ethtool_cmd_speed(legacy_settings);
 489         link_ksettings->base.duplex
 490                 = legacy_settings->duplex;
 491         link_ksettings->base.port
 492                 = legacy_settings->port;
 493         link_ksettings->base.phy_address
 494                 = legacy_settings->phy_address;
 495         link_ksettings->base.autoneg
 496                 = legacy_settings->autoneg;
 497         link_ksettings->base.mdio_support
 498                 = legacy_settings->mdio_support;
 499         link_ksettings->base.eth_tp_mdix
 500                 = legacy_settings->eth_tp_mdix;
 501         link_ksettings->base.eth_tp_mdix_ctrl
 502                 = legacy_settings->eth_tp_mdix_ctrl;
 503         return retval;
 504 }
 505
 506 /* return false if ksettings link modes had higher bits
 507  * set. legacy_settings always updated (best effort)
 508  */
 509 static bool
 510 convert_link_ksettings_to_legacy_settings(
 511         struct ethtool_cmd *legacy_settings,
 512         const struct ethtool_link_ksettings *link_ksettings)
 513 {
 514         bool retval = true;
 515
 516         memset(legacy_settings, 0, sizeof(*legacy_settings));
 517         /* this also clears the deprecated fields in legacy structure:
 518          * __u8         transceiver;
 519          * __u32        maxtxpkt;
 520          * __u32        maxrxpkt;
 521          */
 522
 523         retval &= ethtool_convert_link_mode_to_legacy_u32(
 524                 &legacy_settings->supported,
 525                 link_ksettings->link_modes.supported);
 526         retval &= ethtool_convert_link_mode_to_legacy_u32(
 527                 &legacy_settings->advertising,
 528                 link_ksettings->link_modes.advertising);
 529         retval &= ethtool_convert_link_mode_to_legacy_u32(
 530                 &legacy_settings->lp_advertising,
 531                 link_ksettings->link_modes.lp_advertising);
 532         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 533         legacy_settings->duplex
 534                 = link_ksettings->base.duplex;
 535         legacy_settings->port
 536                 = link_ksettings->base.port;
 537         legacy_settings->phy_address
 538                 = link_ksettings->base.phy_address;
 539         legacy_settings->autoneg
 540                 = link_ksettings->base.autoneg;
 541         legacy_settings->mdio_support
 542                 = link_ksettings->base.mdio_support;
 543         legacy_settings->eth_tp_mdix
 544                 = link_ksettings->base.eth_tp_mdix;
 545         legacy_settings->eth_tp_mdix_ctrl
 546                 = link_ksettings->base.eth_tp_mdix_ctrl;
 547         legacy_settings->transceiver
 548                 = link_ksettings->base.transceiver;
 549         return retval;
 550 }
 551
 552 /* number of 32-bit words to store the user's link mode bitmaps */
 553 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 554         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 555
 556 /* layout of the struct passed from/to userland */
 557 struct ethtool_link_usettings {
 558         struct ethtool_link_settings base;
 559         struct {
 560                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 561                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 562                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 563         } link_modes;
 564 };
 565
 566 /* Internal kernel helper to query a device ethtool_link_settings.
 567  *
 568  * Backward compatibility note: for compatibility with legacy drivers
 569  * that implement only the ethtool_cmd API, this has to work with both
 570  * drivers implementing get_link_ksettings API and drivers
 571  * implementing get_settings API. When drivers implement get_settings
 572  * and report ethtool_cmd deprecated fields
 573  * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
 574  * because the resulting struct ethtool_link_settings does not report them.
 575  */
 576 int __ethtool_get_link_ksettings(struct net_device *dev,
 577                                  struct ethtool_link_ksettings *link_ksettings)
 578 {
 579         int err;
 580         struct ethtool_cmd cmd;
 581
 582         ASSERT_RTNL();
 583
 584         if (dev->ethtool_ops->get_link_ksettings) {
 585                 memset(link_ksettings, 0, sizeof(*link_ksettings));
 586                 return dev->ethtool_ops->get_link_ksettings(dev,
 587                                                             link_ksettings);
 588         }
 589
 590         /* driver doesn't support %ethtool_link_ksettings API. revert to
 591          * legacy %ethtool_cmd API, unless it's not supported either.
 592          * TODO: remove when ethtool_ops::get_settings disappears internally
 593          */
 594         if (!dev->ethtool_ops->get_settings)
 595                 return -EOPNOTSUPP;
 596
 597         memset(&cmd, 0, sizeof(cmd));
 598         cmd.cmd = ETHTOOL_GSET;
 599         err = dev->ethtool_ops->get_settings(dev, &cmd);
 600         if (err < 0)
 601                 return err;
 602
 603         /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
 604          */
 605         convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
 606         return err;
 607 }
 608 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 609
 610 /* convert ethtool_link_usettings in user space to a kernel internal
 611  * ethtool_link_ksettings. return 0 on success, errno on error.
 612  */
 613 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 614                                          const void __user *from)
 615 {
 616         struct ethtool_link_usettings link_usettings;
 617
 618         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 619                 return -EFAULT;
 620
 621         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 622         bitmap_from_arr32(to->link_modes.supported,
 623                           link_usettings.link_modes.supported,
 624                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 625         bitmap_from_arr32(to->link_modes.advertising,
 626                           link_usettings.link_modes.advertising,
 627                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 628         bitmap_from_arr32(to->link_modes.lp_advertising,
 629                           link_usettings.link_modes.lp_advertising,
 630                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 631
 632         return 0;
 633 }
 634
 635 /* convert a kernel internal ethtool_link_ksettings to
 636  * ethtool_link_usettings in user space. return 0 on success, errno on
 637  * error.
 638  */
 639 static int
 640 store_link_ksettings_for_user(void __user *to,
 641                               const struct ethtool_link_ksettings *from)
 642 {
 643         struct ethtool_link_usettings link_usettings;
 644
 645         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 646         bitmap_to_arr32(link_usettings.link_modes.supported,
 647                         from->link_modes.supported,
 648                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 649         bitmap_to_arr32(link_usettings.link_modes.advertising,
 650                         from->link_modes.advertising,
 651                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 652         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 653                         from->link_modes.lp_advertising,
 654                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 655
 656         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 657                 return -EFAULT;
 658
 659         return 0;
 660 }
 661
 662 /* Query device for its ethtool_link_settings.
 663  *
 664  * Backward compatibility note: this function must fail when driver
 665  * does not implement ethtool::get_link_ksettings, even if legacy
 666  * ethtool_ops::get_settings is implemented. This tells new versions
 667  * of ethtool that they should use the legacy API %ETHTOOL_GSET for
 668  * this driver, so that they can correctly access the ethtool_cmd
 669  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 670  * implements ethtool_ops::get_settings anymore.
 671  */
 672 static int ethtool_get_link_ksettings(struct net_device *dev,
 673                                       void __user *useraddr)
 674 {
 675         int err = 0;
 676         struct ethtool_link_ksettings link_ksettings;
 677
 678         ASSERT_RTNL();
 679
 680         if (!dev->ethtool_ops->get_link_ksettings)
 681                 return -EOPNOTSUPP;
 682
 683         /* handle bitmap nbits handshake */
 684         if (copy_from_user(&link_ksettings.base, useraddr,
 685                            sizeof(link_ksettings.base)))
 686                 return -EFAULT;
 687
 688         if (__ETHTOOL_LINK_MODE_MASK_NU32
 689             != link_ksettings.base.link_mode_masks_nwords) {
 690                 /* wrong link mode nbits requested */
 691                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 692                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 693                 /* send back number of words required as negative val */
 694                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 695                                    "need too many bits for link modes!");
 696                 link_ksettings.base.link_mode_masks_nwords
 697                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 698
 699                 /* copy the base fields back to user, not the link
 700                  * mode bitmaps
 701                  */
 702                 if (copy_to_user(useraddr, &link_ksettings.base,
 703                                  sizeof(link_ksettings.base)))
 704                         return -EFAULT;
 705
 706                 return 0;
 707         }
 708
 709         /* handshake successful: user/kernel agree on
 710          * link_mode_masks_nwords
 711          */
 712
 713         memset(&link_ksettings, 0, sizeof(link_ksettings));
 714         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 715         if (err < 0)
 716                 return err;
 717
 718         /* make sure we tell the right values to user */
 719         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 720         link_ksettings.base.link_mode_masks_nwords
 721                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 722
 723         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 724 }
 725
 726 /* Update device ethtool_link_settings.
 727  *
 728  * Backward compatibility note: this function must fail when driver
 729  * does not implement ethtool::set_link_ksettings, even if legacy
 730  * ethtool_ops::set_settings is implemented. This tells new versions
 731  * of ethtool that they should use the legacy API %ETHTOOL_SSET for
 732  * this driver, so that they can correctly update the ethtool_cmd
 733  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 734  * implements ethtool_ops::get_settings anymore.
 735  */
 736 static int ethtool_set_link_ksettings(struct net_device *dev,
 737                                       void __user *useraddr)
 738 {
 739         int err;
 740         struct ethtool_link_ksettings link_ksettings;
 741
 742         ASSERT_RTNL();
 743
 744         if (!dev->ethtool_ops->set_link_ksettings)
 745                 return -EOPNOTSUPP;
 746
 747         /* make sure nbits field has expected value */
 748         if (copy_from_user(&link_ksettings.base, useraddr,
 749                            sizeof(link_ksettings.base)))
 750                 return -EFAULT;
 751
 752         if (__ETHTOOL_LINK_MODE_MASK_NU32
 753             != link_ksettings.base.link_mode_masks_nwords)
 754                 return -EINVAL;
 755
 756         /* copy the whole structure, now that we know it has expected
 757          * format
 758          */
 759         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 760         if (err)
 761                 return err;
 762
 763         /* re-check nwords field, just in case */
 764         if (__ETHTOOL_LINK_MODE_MASK_NU32
 765             != link_ksettings.base.link_mode_masks_nwords)
 766                 return -EINVAL;
 767
 768         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 769 }
 770
 771 /* Query device for its ethtool_cmd settings.
 772  *
 773  * Backward compatibility note: for compatibility with legacy ethtool,
 774  * this has to work with both drivers implementing get_link_ksettings
 775  * API and drivers implementing get_settings API. When drivers
 776  * implement get_link_ksettings and report higher link mode bits, a
 777  * kernel warning is logged once (with name of 1st driver/device) to
 778  * recommend user to upgrade ethtool, but the command is successful
 779  * (only the lower link mode bits reported back to user).
 780  */
 781 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 782 {
 783         struct ethtool_cmd cmd;
 784
 785         ASSERT_RTNL();
 786
 787         if (dev->ethtool_ops->get_link_ksettings) {
 788                 /* First, use link_ksettings API if it is supported */
 789                 int err;
 790                 struct ethtool_link_ksettings link_ksettings;
 791
 792                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 793                 err = dev->ethtool_ops->get_link_ksettings(dev,
 794                                                            &link_ksettings);
 795                 if (err < 0)
 796                         return err;
 797                 convert_link_ksettings_to_legacy_settings(&cmd,
 798                                                           &link_ksettings);
 799
 800                 /* send a sensible cmd tag back to user */
 801                 cmd.cmd = ETHTOOL_GSET;
 802         } else {
 803                 /* driver doesn't support %ethtool_link_ksettings
 804                  * API. revert to legacy %ethtool_cmd API, unless it's
 805                  * not supported either.
 806                  */
 807                 int err;
 808
 809                 if (!dev->ethtool_ops->get_settings)
 810                         return -EOPNOTSUPP;
 811
 812                 memset(&cmd, 0, sizeof(cmd));
 813                 cmd.cmd = ETHTOOL_GSET;
 814                 err = dev->ethtool_ops->get_settings(dev, &cmd);
 815                 if (err < 0)
 816                         return err;
 817         }
 818
 819         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 820                 return -EFAULT;
 821
 822         return 0;
 823 }
 824
 825 /* Update device link settings with given ethtool_cmd.
 826  *
 827  * Backward compatibility note: for compatibility with legacy ethtool,
 828  * this has to work with both drivers implementing set_link_ksettings
 829  * API and drivers implementing set_settings API. When drivers
 830  * implement set_link_ksettings and user's request updates deprecated
 831  * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 832  * warning is logged once (with name of 1st driver/device) to
 833  * recommend user to upgrade ethtool, and the request is rejected.
 834  */
 835 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 836 {
 837         struct ethtool_cmd cmd;
 838
 839         ASSERT_RTNL();
 840
 841         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 842                 return -EFAULT;
 843
 844         /* first, try new %ethtool_link_ksettings API. */
 845         if (dev->ethtool_ops->set_link_ksettings) {
 846                 struct ethtool_link_ksettings link_ksettings;
 847
 848                 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
 849                                                                &cmd))
 850                         return -EINVAL;
 851
 852                 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
 853                 link_ksettings.base.link_mode_masks_nwords
 854                         = __ETHTOOL_LINK_MODE_MASK_NU32;
 855                 return dev->ethtool_ops->set_link_ksettings(dev,
 856                                                             &link_ksettings);
 857         }
 858
 859         /* legacy %ethtool_cmd API */
 860
 861         /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
 862          * disappears internally
 863          */
 864
 865         if (!dev->ethtool_ops->set_settings)
 866                 return -EOPNOTSUPP;
 867
 868         return dev->ethtool_ops->set_settings(dev, &cmd);
 869 }
 870
 871 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 872                                                   void __user *useraddr)
 873 {
 874         struct ethtool_drvinfo info;
 875         const struct ethtool_ops *ops = dev->ethtool_ops;
 876
 877         memset(&info, 0, sizeof(info));
 878         info.cmd = ETHTOOL_GDRVINFO;
 879         if (ops->get_drvinfo) {
 880                 ops->get_drvinfo(dev, &info);
 881         } else if (dev->dev.parent && dev->dev.parent->driver) {
 882                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 883                         sizeof(info.bus_info));
 884                 strlcpy(info.driver, dev->dev.parent->driver->name,
 885                         sizeof(info.driver));
 886         } else {
 887                 return -EOPNOTSUPP;
 888         }
 889
 890         /*
 891          * this method of obtaining string set info is deprecated;
 892          * Use ETHTOOL_GSSET_INFO instead.
 893          */
 894         if (ops->get_sset_count) {
 895                 int rc;
 896
 897                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 898                 if (rc >= 0)
 899                         info.testinfo_len = rc;
 900                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 901                 if (rc >= 0)
 902                         info.n_stats = rc;
 903                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 904                 if (rc >= 0)
 905                         info.n_priv_flags = rc;
 906         }
 907         if (ops->get_regs_len)
 908                 info.regdump_len = ops->get_regs_len(dev);
 909         if (ops->get_eeprom_len)
 910                 info.eedump_len = ops->get_eeprom_len(dev);
 911
 912         if (copy_to_user(useraddr, &info, sizeof(info)))
 913                 return -EFAULT;
 914         return 0;
 915 }
 916
 917 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 918                                                     void __user *useraddr)
 919 {
 920         struct ethtool_sset_info info;
 921         u64 sset_mask;
 922         int i, idx = 0, n_bits = 0, ret, rc;
 923         u32 *info_buf = NULL;
 924
 925         if (copy_from_user(&info, useraddr, sizeof(info)))
 926                 return -EFAULT;
 927
 928         /* store copy of mask, because we zero struct later on */
 929         sset_mask = info.sset_mask;
 930         if (!sset_mask)
 931                 return 0;
 932
 933         /* calculate size of return buffer */
 934         n_bits = hweight64(sset_mask);
 935
 936         memset(&info, 0, sizeof(info));
 937         info.cmd = ETHTOOL_GSSET_INFO;
 938
 939         info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
 940         if (!info_buf)
 941                 return -ENOMEM;
 942
 943         /*
 944          * fill return buffer based on input bitmask and successful
 945          * get_sset_count return
 946          */
 947         for (i = 0; i < 64; i++) {
 948                 if (!(sset_mask & (1ULL << i)))
 949                         continue;
 950
 951                 rc = __ethtool_get_sset_count(dev, i);
 952                 if (rc >= 0) {
 953                         info.sset_mask |= (1ULL << i);
 954                         info_buf[idx++] = rc;
 955                 }
 956         }
 957
 958         ret = -EFAULT;
 959         if (copy_to_user(useraddr, &info, sizeof(info)))
 960                 goto out;
 961
 962         useraddr += offsetof(struct ethtool_sset_info, data);
 963         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 964                 goto out;
 965
 966         ret = 0;
 967
 968 out:
 969         kfree(info_buf);
 970         return ret;
 971 }
 972
 973 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 974                                                 u32 cmd, void __user *useraddr)
 975 {
 976         struct ethtool_rxnfc info;
 977         size_t info_size = sizeof(info);
 978         int rc;
 979
 980         if (!dev->ethtool_ops->set_rxnfc)
 981                 return -EOPNOTSUPP;
 982
 983         /* struct ethtool_rxnfc was originally defined for
 984          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 985          * members.  User-space might still be using that
 986          * definition. */
 987         if (cmd == ETHTOOL_SRXFH)
 988                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 989                              sizeof(info.data));
 990
 991         if (copy_from_user(&info, useraddr, info_size))
 992                 return -EFAULT;
 993
 994         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 995         if (rc)
 996                 return rc;
 997
 998         if (cmd == ETHTOOL_SRXCLSRLINS &&
 999             copy_to_user(useraddr, &info, info_size))
1000                 return -EFAULT;
1001
1002         return 0;
1003 }
1004
1005 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1006                                                 u32 cmd, void __user *useraddr)
1007 {
1008         struct ethtool_rxnfc info;
1009         size_t info_size = sizeof(info);
1010         const struct ethtool_ops *ops = dev->ethtool_ops;
1011         int ret;
1012         void *rule_buf = NULL;
1013
1014         if (!ops->get_rxnfc)
1015                 return -EOPNOTSUPP;
1016
1017         /* struct ethtool_rxnfc was originally defined for
1018          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1019          * members.  User-space might still be using that
1020          * definition. */
1021         if (cmd == ETHTOOL_GRXFH)
1022                 info_size = (offsetof(struct ethtool_rxnfc, data) +
1023                              sizeof(info.data));
1024
1025         if (copy_from_user(&info, useraddr, info_size))
1026                 return -EFAULT;
1027
1028         /* If FLOW_RSS was requested then user-space must be using the
1029          * new definition, as FLOW_RSS is newer.
1030          */
1031         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
1032                 info_size = sizeof(info);
1033                 if (copy_from_user(&info, useraddr, info_size))
1034                         return -EFAULT;
1035                 /* Since malicious users may modify the original data,
1036                  * we need to check whether FLOW_RSS is still requested.
1037                  */
1038                 if (!(info.flow_type & FLOW_RSS))
1039                         return -EINVAL;
1040         }
1041
1042         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1043                 if (info.rule_cnt > 0) {
1044                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1045                                 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1046                                                    GFP_USER);
1047                         if (!rule_buf)
1048                                 return -ENOMEM;
1049                 }
1050         }
1051
1052         ret = ops->get_rxnfc(dev, &info, rule_buf);
1053         if (ret < 0)
1054                 goto err_out;
1055
1056         ret = -EFAULT;
1057         if (copy_to_user(useraddr, &info, info_size))
1058                 goto err_out;
1059
1060         if (rule_buf) {
1061                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1062                 if (copy_to_user(useraddr, rule_buf,
1063                                  info.rule_cnt * sizeof(u32)))
1064                         goto err_out;
1065         }
1066         ret = 0;
1067
1068 err_out:
1069         kfree(rule_buf);
1070
1071         return ret;
1072 }
1073
1074 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1075                                         struct ethtool_rxnfc *rx_rings,
1076                                         u32 size)
1077 {
1078         int i;
1079
1080         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1081                 return -EFAULT;
1082
1083         /* Validate ring indices */
1084         for (i = 0; i < size; i++)
1085                 if (indir[i] >= rx_rings->data)
1086                         return -EINVAL;
1087
1088         return 0;
1089 }
1090
1091 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1092
1093 void netdev_rss_key_fill(void *buffer, size_t len)
1094 {
1095         BUG_ON(len > sizeof(netdev_rss_key));
1096         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1097         memcpy(buffer, netdev_rss_key, len);
1098 }
1099 EXPORT_SYMBOL(netdev_rss_key_fill);
1100
1101 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1102 {
1103         u32 dev_size, current_max = 0;
1104         u32 *indir;
1105         int ret;
1106
1107         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1108             !dev->ethtool_ops->get_rxfh)
1109                 return -EOPNOTSUPP;
1110         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1111         if (dev_size == 0)
1112                 return -EOPNOTSUPP;
1113
1114         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1115         if (!indir)
1116                 return -ENOMEM;
1117
1118         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1119         if (ret)
1120                 goto out;
1121
1122         while (dev_size--)
1123                 current_max = max(current_max, indir[dev_size]);
1124
1125         *max = current_max;
1126
1127 out:
1128         kfree(indir);
1129         return ret;
1130 }
1131
1132 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1133                                                      void __user *useraddr)
1134 {
1135         u32 user_size, dev_size;
1136         u32 *indir;
1137         int ret;
1138
1139         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1140             !dev->ethtool_ops->get_rxfh)
1141                 return -EOPNOTSUPP;
1142         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1143         if (dev_size == 0)
1144                 return -EOPNOTSUPP;
1145
1146         if (copy_from_user(&user_size,
1147                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1148                            sizeof(user_size)))
1149                 return -EFAULT;
1150
1151         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1152                          &dev_size, sizeof(dev_size)))
1153                 return -EFAULT;
1154
1155         /* If the user buffer size is 0, this is just a query for the
1156          * device table size.  Otherwise, if it's smaller than the
1157          * device table size it's an error.
1158          */
1159         if (user_size < dev_size)
1160                 return user_size == 0 ? 0 : -EINVAL;
1161
1162         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1163         if (!indir)
1164                 return -ENOMEM;
1165
1166         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1167         if (ret)
1168                 goto out;
1169
1170         if (copy_to_user(useraddr +
1171                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1172                          indir, dev_size * sizeof(indir[0])))
1173                 ret = -EFAULT;
1174
1175 out:
1176         kfree(indir);
1177         return ret;
1178 }
1179
1180 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1181                                                      void __user *useraddr)
1182 {
1183         struct ethtool_rxnfc rx_rings;
1184         u32 user_size, dev_size, i;
1185         u32 *indir;
1186         const struct ethtool_ops *ops = dev->ethtool_ops;
1187         int ret;
1188         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1189
1190         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1191             !ops->get_rxnfc)
1192                 return -EOPNOTSUPP;
1193
1194         dev_size = ops->get_rxfh_indir_size(dev);
1195         if (dev_size == 0)
1196                 return -EOPNOTSUPP;
1197
1198         if (copy_from_user(&user_size,
1199                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1200                            sizeof(user_size)))
1201                 return -EFAULT;
1202
1203         if (user_size != 0 && user_size != dev_size)
1204                 return -EINVAL;
1205
1206         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1207         if (!indir)
1208                 return -ENOMEM;
1209
1210         rx_rings.cmd = ETHTOOL_GRXRINGS;
1211         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1212         if (ret)
1213                 goto out;
1214
1215         if (user_size == 0) {
1216                 for (i = 0; i < dev_size; i++)
1217                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1218         } else {
1219                 ret = ethtool_copy_validate_indir(indir,
1220                                                   useraddr + ringidx_offset,
1221                                                   &rx_rings,
1222                                                   dev_size);
1223                 if (ret)
1224                         goto out;
1225         }
1226
1227         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1228         if (ret)
1229                 goto out;
1230
1231         /* indicate whether rxfh was set to default */
1232         if (user_size == 0)
1233                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1234         else
1235                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1236
1237 out:
1238         kfree(indir);
1239         return ret;
1240 }
1241
1242 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1243                                                void __user *useraddr)
1244 {
1245         int ret;
1246         const struct ethtool_ops *ops = dev->ethtool_ops;
1247         u32 user_indir_size, user_key_size;
1248         u32 dev_indir_size = 0, dev_key_size = 0;
1249         struct ethtool_rxfh rxfh;
1250         u32 total_size;
1251         u32 indir_bytes;
1252         u32 *indir = NULL;
1253         u8 dev_hfunc = 0;
1254         u8 *hkey = NULL;
1255         u8 *rss_config;
1256
1257         if (!ops->get_rxfh)
1258                 return -EOPNOTSUPP;
1259
1260         if (ops->get_rxfh_indir_size)
1261                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1262         if (ops->get_rxfh_key_size)
1263                 dev_key_size = ops->get_rxfh_key_size(dev);
1264
1265         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1266                 return -EFAULT;
1267         user_indir_size = rxfh.indir_size;
1268         user_key_size = rxfh.key_size;
1269
1270         /* Check that reserved fields are 0 for now */
1271         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1272                 return -EINVAL;
1273         /* Most drivers don't handle rss_context, check it's 0 as well */
1274         if (rxfh.rss_context && !ops->get_rxfh_context)
1275                 return -EOPNOTSUPP;
1276
1277         rxfh.indir_size = dev_indir_size;
1278         rxfh.key_size = dev_key_size;
1279         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1280                 return -EFAULT;
1281
1282         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1283             (user_key_size && (user_key_size != dev_key_size)))
1284                 return -EINVAL;
1285
1286         indir_bytes = user_indir_size * sizeof(indir[0]);
1287         total_size = indir_bytes + user_key_size;
1288         rss_config = kzalloc(total_size, GFP_USER);
1289         if (!rss_config)
1290                 return -ENOMEM;
1291
1292         if (user_indir_size)
1293                 indir = (u32 *)rss_config;
1294
1295         if (user_key_size)
1296                 hkey = rss_config + indir_bytes;
1297
1298         if (rxfh.rss_context)
1299                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1300                                                          &dev_hfunc,
1301                                                          rxfh.rss_context);
1302         else
1303                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1304         if (ret)
1305                 goto out;
1306
1307         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1308                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1309                 ret = -EFAULT;
1310         } else if (copy_to_user(useraddr +
1311                               offsetof(struct ethtool_rxfh, rss_config[0]),
1312                               rss_config, total_size)) {
1313                 ret = -EFAULT;
1314         }
1315 out:
1316         kfree(rss_config);
1317
1318         return ret;
1319 }
1320
1321 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1322                                                void __user *useraddr)
1323 {
1324         int ret;
1325         const struct ethtool_ops *ops = dev->ethtool_ops;
1326         struct ethtool_rxnfc rx_rings;
1327         struct ethtool_rxfh rxfh;
1328         u32 dev_indir_size = 0, dev_key_size = 0, i;
1329         u32 *indir = NULL, indir_bytes = 0;
1330         u8 *hkey = NULL;
1331         u8 *rss_config;
1332         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1333         bool delete = false;
1334
1335         if (!ops->get_rxnfc || !ops->set_rxfh)
1336                 return -EOPNOTSUPP;
1337
1338         if (ops->get_rxfh_indir_size)
1339                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1340         if (ops->get_rxfh_key_size)
1341                 dev_key_size = ops->get_rxfh_key_size(dev);
1342
1343         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1344                 return -EFAULT;
1345
1346         /* Check that reserved fields are 0 for now */
1347         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1348                 return -EINVAL;
1349         /* Most drivers don't handle rss_context, check it's 0 as well */
1350         if (rxfh.rss_context && !ops->set_rxfh_context)
1351                 return -EOPNOTSUPP;
1352
1353         /* If either indir, hash key or function is valid, proceed further.
1354          * Must request at least one change: indir size, hash key or function.
1355          */
1356         if ((rxfh.indir_size &&
1357              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1358              rxfh.indir_size != dev_indir_size) ||
1359             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1360             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1361              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1362                 return -EINVAL;
1363
1364         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1365                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1366
1367         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1368         if (!rss_config)
1369                 return -ENOMEM;
1370
1371         rx_rings.cmd = ETHTOOL_GRXRINGS;
1372         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1373         if (ret)
1374                 goto out;
1375
1376         /* rxfh.indir_size == 0 means reset the indir table to default (master
1377          * context) or delete the context (other RSS contexts).
1378          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1379          */
1380         if (rxfh.indir_size &&
1381             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1382                 indir = (u32 *)rss_config;
1383                 ret = ethtool_copy_validate_indir(indir,
1384                                                   useraddr + rss_cfg_offset,
1385                                                   &rx_rings,
1386                                                   rxfh.indir_size);
1387                 if (ret)
1388                         goto out;
1389         } else if (rxfh.indir_size == 0) {
1390                 if (rxfh.rss_context == 0) {
1391                         indir = (u32 *)rss_config;
1392                         for (i = 0; i < dev_indir_size; i++)
1393                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1394                 } else {
1395                         delete = true;
1396                 }
1397         }
1398
1399         if (rxfh.key_size) {
1400                 hkey = rss_config + indir_bytes;
1401                 if (copy_from_user(hkey,
1402                                    useraddr + rss_cfg_offset + indir_bytes,
1403                                    rxfh.key_size)) {
1404                         ret = -EFAULT;
1405                         goto out;
1406                 }
1407         }
1408
1409         if (rxfh.rss_context)
1410                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1411                                             &rxfh.rss_context, delete);
1412         else
1413                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1414         if (ret)
1415                 goto out;
1416
1417         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1418                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1419                 ret = -EFAULT;
1420
1421         if (!rxfh.rss_context) {
1422                 /* indicate whether rxfh was set to default */
1423                 if (rxfh.indir_size == 0)
1424                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1425                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1426                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1427         }
1428
1429 out:
1430         kfree(rss_config);
1431         return ret;
1432 }
1433
1434 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1435 {
1436         struct ethtool_regs regs;
1437         const struct ethtool_ops *ops = dev->ethtool_ops;
1438         void *regbuf;
1439         int reglen, ret;
1440
1441         if (!ops->get_regs || !ops->get_regs_len)
1442                 return -EOPNOTSUPP;
1443
1444         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1445                 return -EFAULT;
1446
1447         reglen = ops->get_regs_len(dev);
1448         if (regs.len > reglen)
1449                 regs.len = reglen;
1450
1451         regbuf = NULL;
1452         if (reglen) {
1453                 regbuf = vzalloc(reglen);
1454                 if (!regbuf)
1455                         return -ENOMEM;
1456         }
1457
1458         ops->get_regs(dev, &regs, regbuf);
1459
1460         ret = -EFAULT;
1461         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1462                 goto out;
1463         useraddr += offsetof(struct ethtool_regs, data);
1464         if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1465                 goto out;
1466         ret = 0;
1467
1468  out:
1469         vfree(regbuf);
1470         return ret;
1471 }
1472
1473 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1474 {
1475         struct ethtool_value reset;
1476         int ret;
1477
1478         if (!dev->ethtool_ops->reset)
1479                 return -EOPNOTSUPP;
1480
1481         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1482                 return -EFAULT;
1483
1484         ret = dev->ethtool_ops->reset(dev, &reset.data);
1485         if (ret)
1486                 return ret;
1487
1488         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1489                 return -EFAULT;
1490         return 0;
1491 }
1492
1493 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1494 {
1495         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1496
1497         if (!dev->ethtool_ops->get_wol)
1498                 return -EOPNOTSUPP;
1499
1500         dev->ethtool_ops->get_wol(dev, &wol);
1501
1502         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1503                 return -EFAULT;
1504         return 0;
1505 }
1506
1507 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1508 {
1509         struct ethtool_wolinfo wol;
1510
1511         if (!dev->ethtool_ops->set_wol)
1512                 return -EOPNOTSUPP;
1513
1514         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1515                 return -EFAULT;
1516
1517         return dev->ethtool_ops->set_wol(dev, &wol);
1518 }
1519
1520 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1521 {
1522         struct ethtool_eee edata;
1523         int rc;
1524
1525         if (!dev->ethtool_ops->get_eee)
1526                 return -EOPNOTSUPP;
1527
1528         memset(&edata, 0, sizeof(struct ethtool_eee));
1529         edata.cmd = ETHTOOL_GEEE;
1530         rc = dev->ethtool_ops->get_eee(dev, &edata);
1531
1532         if (rc)
1533                 return rc;
1534
1535         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1536                 return -EFAULT;
1537
1538         return 0;
1539 }
1540
1541 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1542 {
1543         struct ethtool_eee edata;
1544
1545         if (!dev->ethtool_ops->set_eee)
1546                 return -EOPNOTSUPP;
1547
1548         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1549                 return -EFAULT;
1550
1551         return dev->ethtool_ops->set_eee(dev, &edata);
1552 }
1553
1554 static int ethtool_nway_reset(struct net_device *dev)
1555 {
1556         if (!dev->ethtool_ops->nway_reset)
1557                 return -EOPNOTSUPP;
1558
1559         return dev->ethtool_ops->nway_reset(dev);
1560 }
1561
1562 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1563 {
1564         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1565
1566         if (!dev->ethtool_ops->get_link)
1567                 return -EOPNOTSUPP;
1568
1569         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1570
1571         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1572                 return -EFAULT;
1573         return 0;
1574 }
1575
1576 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1577                                   int (*getter)(struct net_device *,
1578                                                 struct ethtool_eeprom *, u8 *),
1579                                   u32 total_len)
1580 {
1581         struct ethtool_eeprom eeprom;
1582         void __user *userbuf = useraddr + sizeof(eeprom);
1583         u32 bytes_remaining;
1584         u8 *data;
1585         int ret = 0;
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 > total_len)
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                 ret = getter(dev, &eeprom, data);
1607                 if (ret)
1608                         break;
1609                 if (copy_to_user(userbuf, data, eeprom.len)) {
1610                         ret = -EFAULT;
1611                         break;
1612                 }
1613                 userbuf += eeprom.len;
1614                 eeprom.offset += eeprom.len;
1615                 bytes_remaining -= eeprom.len;
1616         }
1617
1618         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1619         eeprom.offset -= eeprom.len;
1620         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1621                 ret = -EFAULT;
1622
1623         kfree(data);
1624         return ret;
1625 }
1626
1627 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1628 {
1629         const struct ethtool_ops *ops = dev->ethtool_ops;
1630
1631         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1632             !ops->get_eeprom_len(dev))
1633                 return -EOPNOTSUPP;
1634
1635         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1636                                       ops->get_eeprom_len(dev));
1637 }
1638
1639 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1640 {
1641         struct ethtool_eeprom eeprom;
1642         const struct ethtool_ops *ops = dev->ethtool_ops;
1643         void __user *userbuf = useraddr + sizeof(eeprom);
1644         u32 bytes_remaining;
1645         u8 *data;
1646         int ret = 0;
1647
1648         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1649             !ops->get_eeprom_len(dev))
1650                 return -EOPNOTSUPP;
1651
1652         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1653                 return -EFAULT;
1654
1655         /* Check for wrap and zero */
1656         if (eeprom.offset + eeprom.len <= eeprom.offset)
1657                 return -EINVAL;
1658
1659         /* Check for exceeding total eeprom len */
1660         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1661                 return -EINVAL;
1662
1663         data = kmalloc(PAGE_SIZE, GFP_USER);
1664         if (!data)
1665                 return -ENOMEM;
1666
1667         bytes_remaining = eeprom.len;
1668         while (bytes_remaining > 0) {
1669                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1670
1671                 if (copy_from_user(data, userbuf, eeprom.len)) {
1672                         ret = -EFAULT;
1673                         break;
1674                 }
1675                 ret = ops->set_eeprom(dev, &eeprom, data);
1676                 if (ret)
1677                         break;
1678                 userbuf += eeprom.len;
1679                 eeprom.offset += eeprom.len;
1680                 bytes_remaining -= eeprom.len;
1681         }
1682
1683         kfree(data);
1684         return ret;
1685 }
1686
1687 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1688                                                    void __user *useraddr)
1689 {
1690         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1691
1692         if (!dev->ethtool_ops->get_coalesce)
1693                 return -EOPNOTSUPP;
1694
1695         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1696
1697         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1698                 return -EFAULT;
1699         return 0;
1700 }
1701
1702 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1703                                                    void __user *useraddr)
1704 {
1705         struct ethtool_coalesce coalesce;
1706
1707         if (!dev->ethtool_ops->set_coalesce)
1708                 return -EOPNOTSUPP;
1709
1710         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1711                 return -EFAULT;
1712
1713         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1714 }
1715
1716 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1717 {
1718         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1719
1720         if (!dev->ethtool_ops->get_ringparam)
1721                 return -EOPNOTSUPP;
1722
1723         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1724
1725         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1726                 return -EFAULT;
1727         return 0;
1728 }
1729
1730 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1731 {
1732         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1733
1734         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1735                 return -EOPNOTSUPP;
1736
1737         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1738                 return -EFAULT;
1739
1740         dev->ethtool_ops->get_ringparam(dev, &max);
1741
1742         /* ensure new ring parameters are within the maximums */
1743         if (ringparam.rx_pending > max.rx_max_pending ||
1744             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1745             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1746             ringparam.tx_pending > max.tx_max_pending)
1747                 return -EINVAL;
1748
1749         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1750 }
1751
1752 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1753                                                    void __user *useraddr)
1754 {
1755         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1756
1757         if (!dev->ethtool_ops->get_channels)
1758                 return -EOPNOTSUPP;
1759
1760         dev->ethtool_ops->get_channels(dev, &channels);
1761
1762         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1763                 return -EFAULT;
1764         return 0;
1765 }
1766
1767 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1768                                                    void __user *useraddr)
1769 {
1770         struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1771         u32 max_rx_in_use = 0;
1772
1773         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1774                 return -EOPNOTSUPP;
1775
1776         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1777                 return -EFAULT;
1778
1779         dev->ethtool_ops->get_channels(dev, &max);
1780
1781         /* ensure new counts are within the maximums */
1782         if ((channels.rx_count > max.max_rx) ||
1783             (channels.tx_count > max.max_tx) ||
1784             (channels.combined_count > max.max_combined) ||
1785             (channels.other_count > max.max_other))
1786                 return -EINVAL;
1787
1788         /* ensure the new Rx count fits within the configured Rx flow
1789          * indirection table settings */
1790         if (netif_is_rxfh_configured(dev) &&
1791             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1792             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1793             return -EINVAL;
1794
1795         return dev->ethtool_ops->set_channels(dev, &channels);
1796 }
1797
1798 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1799 {
1800         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1801
1802         if (!dev->ethtool_ops->get_pauseparam)
1803                 return -EOPNOTSUPP;
1804
1805         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1806
1807         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1808                 return -EFAULT;
1809         return 0;
1810 }
1811
1812 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1813 {
1814         struct ethtool_pauseparam pauseparam;
1815
1816         if (!dev->ethtool_ops->set_pauseparam)
1817                 return -EOPNOTSUPP;
1818
1819         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1820                 return -EFAULT;
1821
1822         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1823 }
1824
1825 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1826 {
1827         struct ethtool_test test;
1828         const struct ethtool_ops *ops = dev->ethtool_ops;
1829         u64 *data;
1830         int ret, test_len;
1831
1832         if (!ops->self_test || !ops->get_sset_count)
1833                 return -EOPNOTSUPP;
1834
1835         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1836         if (test_len < 0)
1837                 return test_len;
1838         WARN_ON(test_len == 0);
1839
1840         if (copy_from_user(&test, useraddr, sizeof(test)))
1841                 return -EFAULT;
1842
1843         test.len = test_len;
1844         data = kmalloc(test_len * sizeof(u64), GFP_USER);
1845         if (!data)
1846                 return -ENOMEM;
1847
1848         ops->self_test(dev, &test, data);
1849
1850         ret = -EFAULT;
1851         if (copy_to_user(useraddr, &test, sizeof(test)))
1852                 goto out;
1853         useraddr += sizeof(test);
1854         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1855                 goto out;
1856         ret = 0;
1857
1858  out:
1859         kfree(data);
1860         return ret;
1861 }
1862
1863 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1864 {
1865         struct ethtool_gstrings gstrings;
1866         u8 *data;
1867         int ret;
1868
1869         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1870                 return -EFAULT;
1871
1872         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1873         if (ret < 0)
1874                 return ret;
1875         if (ret > S32_MAX / ETH_GSTRING_LEN)
1876                 return -ENOMEM;
1877         WARN_ON_ONCE(!ret);
1878
1879         gstrings.len = ret;
1880         data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1881         if (gstrings.len && !data)
1882                 return -ENOMEM;
1883
1884         __ethtool_get_strings(dev, gstrings.string_set, data);
1885
1886         ret = -EFAULT;
1887         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1888                 goto out;
1889         useraddr += sizeof(gstrings);
1890         if (gstrings.len &&
1891             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1892                 goto out;
1893         ret = 0;
1894
1895 out:
1896         vfree(data);
1897         return ret;
1898 }
1899
1900 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1901 {
1902         struct ethtool_value id;
1903         static bool busy;
1904         const struct ethtool_ops *ops = dev->ethtool_ops;
1905         int rc;
1906
1907         if (!ops->set_phys_id)
1908                 return -EOPNOTSUPP;
1909
1910         if (busy)
1911                 return -EBUSY;
1912
1913         if (copy_from_user(&id, useraddr, sizeof(id)))
1914                 return -EFAULT;
1915
1916         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1917         if (rc < 0)
1918                 return rc;
1919
1920         /* Drop the RTNL lock while waiting, but prevent reentry or
1921          * removal of the device.
1922          */
1923         busy = true;
1924         dev_hold(dev);
1925         rtnl_unlock();
1926
1927         if (rc == 0) {
1928                 /* Driver will handle this itself */
1929                 schedule_timeout_interruptible(
1930                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1931         } else {
1932                 /* Driver expects to be called at twice the frequency in rc */
1933                 int n = rc * 2, i, interval = HZ / n;
1934
1935                 /* Count down seconds */
1936                 do {
1937                         /* Count down iterations per second */
1938                         i = n;
1939                         do {
1940                                 rtnl_lock();
1941                                 rc = ops->set_phys_id(dev,
1942                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1943                                 rtnl_unlock();
1944                                 if (rc)
1945                                         break;
1946                                 schedule_timeout_interruptible(interval);
1947                         } while (!signal_pending(current) && --i != 0);
1948                 } while (!signal_pending(current) &&
1949                          (id.data == 0 || --id.data != 0));
1950         }
1951
1952         rtnl_lock();
1953         dev_put(dev);
1954         busy = false;
1955
1956         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1957         return rc;
1958 }
1959
1960 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1961 {
1962         struct ethtool_stats stats;
1963         const struct ethtool_ops *ops = dev->ethtool_ops;
1964         u64 *data;
1965         int ret, n_stats;
1966
1967         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1968                 return -EOPNOTSUPP;
1969
1970         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1971         if (n_stats < 0)
1972                 return n_stats;
1973         if (n_stats > S32_MAX / sizeof(u64))
1974                 return -ENOMEM;
1975         WARN_ON_ONCE(!n_stats);
1976         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1977                 return -EFAULT;
1978
1979         stats.n_stats = n_stats;
1980         data = vzalloc(n_stats * sizeof(u64));
1981         if (n_stats && !data)
1982                 return -ENOMEM;
1983
1984         ops->get_ethtool_stats(dev, &stats, data);
1985
1986         ret = -EFAULT;
1987         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1988                 goto out;
1989         useraddr += sizeof(stats);
1990         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1991                 goto out;
1992         ret = 0;
1993
1994  out:
1995         vfree(data);
1996         return ret;
1997 }
1998
1999 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2000 {
2001         struct ethtool_stats stats;
2002         struct phy_device *phydev = dev->phydev;
2003         u64 *data;
2004         int ret, n_stats;
2005
2006         if (!phydev)
2007                 return -EOPNOTSUPP;
2008
2009         n_stats = phy_get_sset_count(phydev);
2010         if (n_stats < 0)
2011                 return n_stats;
2012         if (n_stats > S32_MAX / sizeof(u64))
2013                 return -ENOMEM;
2014         WARN_ON_ONCE(!n_stats);
2015
2016         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2017                 return -EFAULT;
2018
2019         stats.n_stats = n_stats;
2020         data = vzalloc(n_stats * sizeof(u64));
2021         if (n_stats && !data)
2022                 return -ENOMEM;
2023
2024         mutex_lock(&phydev->lock);
2025         phydev->drv->get_stats(phydev, &stats, data);
2026         mutex_unlock(&phydev->lock);
2027
2028         ret = -EFAULT;
2029         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2030                 goto out;
2031         useraddr += sizeof(stats);
2032         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
2033                 goto out;
2034         ret = 0;
2035
2036  out:
2037         vfree(data);
2038         return ret;
2039 }
2040
2041 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2042 {
2043         struct ethtool_perm_addr epaddr;
2044
2045         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2046                 return -EFAULT;
2047
2048         if (epaddr.size < dev->addr_len)
2049                 return -ETOOSMALL;
2050         epaddr.size = dev->addr_len;
2051
2052         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2053                 return -EFAULT;
2054         useraddr += sizeof(epaddr);
2055         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2056                 return -EFAULT;
2057         return 0;
2058 }
2059
2060 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2061                              u32 cmd, u32 (*actor)(struct net_device *))
2062 {
2063         struct ethtool_value edata = { .cmd = cmd };
2064
2065         if (!actor)
2066                 return -EOPNOTSUPP;
2067
2068         edata.data = actor(dev);
2069
2070         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2071                 return -EFAULT;
2072         return 0;
2073 }
2074
2075 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2076                              void (*actor)(struct net_device *, u32))
2077 {
2078         struct ethtool_value edata;
2079
2080         if (!actor)
2081                 return -EOPNOTSUPP;
2082
2083         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2084                 return -EFAULT;
2085
2086         actor(dev, edata.data);
2087         return 0;
2088 }
2089
2090 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2091                              int (*actor)(struct net_device *, u32))
2092 {
2093         struct ethtool_value edata;
2094
2095         if (!actor)
2096                 return -EOPNOTSUPP;
2097
2098         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2099                 return -EFAULT;
2100
2101         return actor(dev, edata.data);
2102 }
2103
2104 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2105                                                    char __user *useraddr)
2106 {
2107         struct ethtool_flash efl;
2108
2109         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2110                 return -EFAULT;
2111
2112         if (!dev->ethtool_ops->flash_device)
2113                 return -EOPNOTSUPP;
2114
2115         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2116
2117         return dev->ethtool_ops->flash_device(dev, &efl);
2118 }
2119
2120 static int ethtool_set_dump(struct net_device *dev,
2121                         void __user *useraddr)
2122 {
2123         struct ethtool_dump dump;
2124
2125         if (!dev->ethtool_ops->set_dump)
2126                 return -EOPNOTSUPP;
2127
2128         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2129                 return -EFAULT;
2130
2131         return dev->ethtool_ops->set_dump(dev, &dump);
2132 }
2133
2134 static int ethtool_get_dump_flag(struct net_device *dev,
2135                                 void __user *useraddr)
2136 {
2137         int ret;
2138         struct ethtool_dump dump;
2139         const struct ethtool_ops *ops = dev->ethtool_ops;
2140
2141         if (!ops->get_dump_flag)
2142                 return -EOPNOTSUPP;
2143
2144         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2145                 return -EFAULT;
2146
2147         ret = ops->get_dump_flag(dev, &dump);
2148         if (ret)
2149                 return ret;
2150
2151         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2152                 return -EFAULT;
2153         return 0;
2154 }
2155
2156 static int ethtool_get_dump_data(struct net_device *dev,
2157                                 void __user *useraddr)
2158 {
2159         int ret;
2160         __u32 len;
2161         struct ethtool_dump dump, tmp;
2162         const struct ethtool_ops *ops = dev->ethtool_ops;
2163         void *data = NULL;
2164
2165         if (!ops->get_dump_data || !ops->get_dump_flag)
2166                 return -EOPNOTSUPP;
2167
2168         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2169                 return -EFAULT;
2170
2171         memset(&tmp, 0, sizeof(tmp));
2172         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2173         ret = ops->get_dump_flag(dev, &tmp);
2174         if (ret)
2175                 return ret;
2176
2177         len = min(tmp.len, dump.len);
2178         if (!len)
2179                 return -EFAULT;
2180
2181         /* Don't ever let the driver think there's more space available
2182          * than it requested with .get_dump_flag().
2183          */
2184         dump.len = len;
2185
2186         /* Always allocate enough space to hold the whole thing so that the
2187          * driver does not need to check the length and bother with partial
2188          * dumping.
2189          */
2190         data = vzalloc(tmp.len);
2191         if (!data)
2192                 return -ENOMEM;
2193         ret = ops->get_dump_data(dev, &dump, data);
2194         if (ret)
2195                 goto out;
2196
2197         /* There are two sane possibilities:
2198          * 1. The driver's .get_dump_data() does not touch dump.len.
2199          * 2. Or it may set dump.len to how much it really writes, which
2200          *    should be tmp.len (or len if it can do a partial dump).
2201          * In any case respond to userspace with the actual length of data
2202          * it's receiving.
2203          */
2204         WARN_ON(dump.len != len && dump.len != tmp.len);
2205         dump.len = len;
2206
2207         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2208                 ret = -EFAULT;
2209                 goto out;
2210         }
2211         useraddr += offsetof(struct ethtool_dump, data);
2212         if (copy_to_user(useraddr, data, len))
2213                 ret = -EFAULT;
2214 out:
2215         vfree(data);
2216         return ret;
2217 }
2218
2219 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2220 {
2221         int err = 0;
2222         struct ethtool_ts_info info;
2223         const struct ethtool_ops *ops = dev->ethtool_ops;
2224         struct phy_device *phydev = dev->phydev;
2225
2226         memset(&info, 0, sizeof(info));
2227         info.cmd = ETHTOOL_GET_TS_INFO;
2228
2229         if (phydev && phydev->drv && phydev->drv->ts_info) {
2230                 err = phydev->drv->ts_info(phydev, &info);
2231         } else if (ops->get_ts_info) {
2232                 err = ops->get_ts_info(dev, &info);
2233         } else {
2234                 info.so_timestamping =
2235                         SOF_TIMESTAMPING_RX_SOFTWARE |
2236                         SOF_TIMESTAMPING_SOFTWARE;
2237                 info.phc_index = -1;
2238         }
2239
2240         if (err)
2241                 return err;
2242
2243         if (copy_to_user(useraddr, &info, sizeof(info)))
2244                 err = -EFAULT;
2245
2246         return err;
2247 }
2248
2249 static int __ethtool_get_module_info(struct net_device *dev,
2250                                      struct ethtool_modinfo *modinfo)
2251 {
2252         const struct ethtool_ops *ops = dev->ethtool_ops;
2253         struct phy_device *phydev = dev->phydev;
2254
2255         if (dev->sfp_bus)
2256                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2257
2258         if (phydev && phydev->drv && phydev->drv->module_info)
2259                 return phydev->drv->module_info(phydev, modinfo);
2260
2261         if (ops->get_module_info)
2262                 return ops->get_module_info(dev, modinfo);
2263
2264         return -EOPNOTSUPP;
2265 }
2266
2267 static int ethtool_get_module_info(struct net_device *dev,
2268                                    void __user *useraddr)
2269 {
2270         int ret;
2271         struct ethtool_modinfo modinfo;
2272
2273         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2274                 return -EFAULT;
2275
2276         ret = __ethtool_get_module_info(dev, &modinfo);
2277         if (ret)
2278                 return ret;
2279
2280         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2281                 return -EFAULT;
2282
2283         return 0;
2284 }
2285
2286 static int __ethtool_get_module_eeprom(struct net_device *dev,
2287                                        struct ethtool_eeprom *ee, u8 *data)
2288 {
2289         const struct ethtool_ops *ops = dev->ethtool_ops;
2290         struct phy_device *phydev = dev->phydev;
2291
2292         if (dev->sfp_bus)
2293                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2294
2295         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2296                 return phydev->drv->module_eeprom(phydev, ee, data);
2297
2298         if (ops->get_module_eeprom)
2299                 return ops->get_module_eeprom(dev, ee, data);
2300
2301         return -EOPNOTSUPP;
2302 }
2303
2304 static int ethtool_get_module_eeprom(struct net_device *dev,
2305                                      void __user *useraddr)
2306 {
2307         int ret;
2308         struct ethtool_modinfo modinfo;
2309
2310         ret = __ethtool_get_module_info(dev, &modinfo);
2311         if (ret)
2312                 return ret;
2313
2314         return ethtool_get_any_eeprom(dev, useraddr,
2315                                       __ethtool_get_module_eeprom,
2316                                       modinfo.eeprom_len);
2317 }
2318
2319 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2320 {
2321         switch (tuna->id) {
2322         case ETHTOOL_RX_COPYBREAK:
2323         case ETHTOOL_TX_COPYBREAK:
2324                 if (tuna->len != sizeof(u32) ||
2325                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2326                         return -EINVAL;
2327                 break;
2328         case ETHTOOL_PFC_PREVENTION_TOUT:
2329                 if (tuna->len != sizeof(u16) ||
2330                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2331                         return -EINVAL;
2332                 break;
2333         default:
2334                 return -EINVAL;
2335         }
2336
2337         return 0;
2338 }
2339
2340 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2341 {
2342         int ret;
2343         struct ethtool_tunable tuna;
2344         const struct ethtool_ops *ops = dev->ethtool_ops;
2345         void *data;
2346
2347         if (!ops->get_tunable)
2348                 return -EOPNOTSUPP;
2349         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2350                 return -EFAULT;
2351         ret = ethtool_tunable_valid(&tuna);
2352         if (ret)
2353                 return ret;
2354         data = kmalloc(tuna.len, GFP_USER);
2355         if (!data)
2356                 return -ENOMEM;
2357         ret = ops->get_tunable(dev, &tuna, data);
2358         if (ret)
2359                 goto out;
2360         useraddr += sizeof(tuna);
2361         ret = -EFAULT;
2362         if (copy_to_user(useraddr, data, tuna.len))
2363                 goto out;
2364         ret = 0;
2365
2366 out:
2367         kfree(data);
2368         return ret;
2369 }
2370
2371 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2372 {
2373         int ret;
2374         struct ethtool_tunable tuna;
2375         const struct ethtool_ops *ops = dev->ethtool_ops;
2376         void *data;
2377
2378         if (!ops->set_tunable)
2379                 return -EOPNOTSUPP;
2380         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2381                 return -EFAULT;
2382         ret = ethtool_tunable_valid(&tuna);
2383         if (ret)
2384                 return ret;
2385         useraddr += sizeof(tuna);
2386         data = memdup_user(useraddr, tuna.len);
2387         if (IS_ERR(data))
2388                 return PTR_ERR(data);
2389         ret = ops->set_tunable(dev, &tuna, data);
2390
2391         kfree(data);
2392         return ret;
2393 }
2394
2395 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2396                                           void __user *useraddr,
2397                                           struct ethtool_per_queue_op *per_queue_opt)
2398 {
2399         u32 bit;
2400         int ret;
2401         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2402
2403         if (!dev->ethtool_ops->get_per_queue_coalesce)
2404                 return -EOPNOTSUPP;
2405
2406         useraddr += sizeof(*per_queue_opt);
2407
2408         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2409                           MAX_NUM_QUEUE);
2410
2411         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2412                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2413
2414                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2415                 if (ret != 0)
2416                         return ret;
2417                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2418                         return -EFAULT;
2419                 useraddr += sizeof(coalesce);
2420         }
2421
2422         return 0;
2423 }
2424
2425 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2426                                           void __user *useraddr,
2427                                           struct ethtool_per_queue_op *per_queue_opt)
2428 {
2429         u32 bit;
2430         int i, ret = 0;
2431         int n_queue;
2432         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2433         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2434
2435         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2436             (!dev->ethtool_ops->get_per_queue_coalesce))
2437                 return -EOPNOTSUPP;
2438
2439         useraddr += sizeof(*per_queue_opt);
2440
2441         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2442         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2443         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2444         if (!backup)
2445                 return -ENOMEM;
2446
2447         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2448                 struct ethtool_coalesce coalesce;
2449
2450                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2451                 if (ret != 0)
2452                         goto roll_back;
2453
2454                 tmp++;
2455
2456                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2457                         ret = -EFAULT;
2458                         goto roll_back;
2459                 }
2460
2461                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2462                 if (ret != 0)
2463                         goto roll_back;
2464
2465                 useraddr += sizeof(coalesce);
2466         }
2467
2468 roll_back:
2469         if (ret != 0) {
2470                 tmp = backup;
2471                 for_each_set_bit(i, queue_mask, bit) {
2472                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2473                         tmp++;
2474                 }
2475         }
2476         kfree(backup);
2477
2478         return ret;
2479 }
2480
2481 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2482 {
2483         struct ethtool_per_queue_op per_queue_opt;
2484
2485         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2486                 return -EFAULT;
2487
2488         switch (per_queue_opt.sub_command) {
2489         case ETHTOOL_GCOALESCE:
2490                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2491         case ETHTOOL_SCOALESCE:
2492                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2493         default:
2494                 return -EOPNOTSUPP;
2495         };
2496 }
2497
2498 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2499 {
2500         switch (tuna->id) {
2501         case ETHTOOL_PHY_DOWNSHIFT:
2502                 if (tuna->len != sizeof(u8) ||
2503                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2504                         return -EINVAL;
2505                 break;
2506         default:
2507                 return -EINVAL;
2508         }
2509
2510         return 0;
2511 }
2512
2513 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2514 {
2515         int ret;
2516         struct ethtool_tunable tuna;
2517         struct phy_device *phydev = dev->phydev;
2518         void *data;
2519
2520         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2521                 return -EOPNOTSUPP;
2522
2523         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2524                 return -EFAULT;
2525         ret = ethtool_phy_tunable_valid(&tuna);
2526         if (ret)
2527                 return ret;
2528         data = kmalloc(tuna.len, GFP_USER);
2529         if (!data)
2530                 return -ENOMEM;
2531         mutex_lock(&phydev->lock);
2532         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2533         mutex_unlock(&phydev->lock);
2534         if (ret)
2535                 goto out;
2536         useraddr += sizeof(tuna);
2537         ret = -EFAULT;
2538         if (copy_to_user(useraddr, data, tuna.len))
2539                 goto out;
2540         ret = 0;
2541
2542 out:
2543         kfree(data);
2544         return ret;
2545 }
2546
2547 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2548 {
2549         int ret;
2550         struct ethtool_tunable tuna;
2551         struct phy_device *phydev = dev->phydev;
2552         void *data;
2553
2554         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2555                 return -EOPNOTSUPP;
2556         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2557                 return -EFAULT;
2558         ret = ethtool_phy_tunable_valid(&tuna);
2559         if (ret)
2560                 return ret;
2561         useraddr += sizeof(tuna);
2562         data = memdup_user(useraddr, tuna.len);
2563         if (IS_ERR(data))
2564                 return PTR_ERR(data);
2565         mutex_lock(&phydev->lock);
2566         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2567         mutex_unlock(&phydev->lock);
2568
2569         kfree(data);
2570         return ret;
2571 }
2572
2573 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2574 {
2575         struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2576         int rc;
2577
2578         if (!dev->ethtool_ops->get_fecparam)
2579                 return -EOPNOTSUPP;
2580
2581         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2582         if (rc)
2583                 return rc;
2584
2585         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2586                 return -EFAULT;
2587         return 0;
2588 }
2589
2590 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2591 {
2592         struct ethtool_fecparam fecparam;
2593
2594         if (!dev->ethtool_ops->set_fecparam)
2595                 return -EOPNOTSUPP;
2596
2597         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2598                 return -EFAULT;
2599
2600         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2601 }
2602
2603 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2604
2605 int dev_ethtool(struct net *net, struct ifreq *ifr)
2606 {
2607         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2608         void __user *useraddr = ifr->ifr_data;
2609         u32 ethcmd, sub_cmd;
2610         int rc;
2611         netdev_features_t old_features;
2612
2613         if (!dev || !netif_device_present(dev))
2614                 return -ENODEV;
2615
2616         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2617                 return -EFAULT;
2618
2619         if (ethcmd == ETHTOOL_PERQUEUE) {
2620                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2621                         return -EFAULT;
2622         } else {
2623                 sub_cmd = ethcmd;
2624         }
2625         /* Allow some commands to be done by anyone */
2626         switch (sub_cmd) {
2627         case ETHTOOL_GSET:
2628         case ETHTOOL_GDRVINFO:
2629         case ETHTOOL_GMSGLVL:
2630         case ETHTOOL_GLINK:
2631         case ETHTOOL_GCOALESCE:
2632         case ETHTOOL_GRINGPARAM:
2633         case ETHTOOL_GPAUSEPARAM:
2634         case ETHTOOL_GRXCSUM:
2635         case ETHTOOL_GTXCSUM:
2636         case ETHTOOL_GSG:
2637         case ETHTOOL_GSSET_INFO:
2638         case ETHTOOL_GSTRINGS:
2639         case ETHTOOL_GSTATS:
2640         case ETHTOOL_GPHYSTATS:
2641         case ETHTOOL_GTSO:
2642         case ETHTOOL_GPERMADDR:
2643         case ETHTOOL_GGSO:
2644         case ETHTOOL_GGRO:
2645         case ETHTOOL_GFLAGS:
2646         case ETHTOOL_GPFLAGS:
2647         case ETHTOOL_GRXFH:
2648         case ETHTOOL_GRXRINGS:
2649         case ETHTOOL_GRXCLSRLCNT:
2650         case ETHTOOL_GRXCLSRULE:
2651         case ETHTOOL_GRXCLSRLALL:
2652         case ETHTOOL_GRXFHINDIR:
2653         case ETHTOOL_GRSSH:
2654         case ETHTOOL_GFEATURES:
2655         case ETHTOOL_GCHANNELS:
2656         case ETHTOOL_GET_TS_INFO:
2657         case ETHTOOL_GEEE:
2658         case ETHTOOL_GTUNABLE:
2659         case ETHTOOL_PHY_GTUNABLE:
2660         case ETHTOOL_GLINKSETTINGS:
2661         case ETHTOOL_GFECPARAM:
2662                 break;
2663         default:
2664                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2665                         return -EPERM;
2666         }
2667
2668         if (dev->ethtool_ops->begin) {
2669                 rc = dev->ethtool_ops->begin(dev);
2670                 if (rc  < 0)
2671                         return rc;
2672         }
2673         old_features = dev->features;
2674
2675         switch (ethcmd) {
2676         case ETHTOOL_GSET:
2677                 rc = ethtool_get_settings(dev, useraddr);
2678                 break;
2679         case ETHTOOL_SSET:
2680                 rc = ethtool_set_settings(dev, useraddr);
2681                 break;
2682         case ETHTOOL_GDRVINFO:
2683                 rc = ethtool_get_drvinfo(dev, useraddr);
2684                 break;
2685         case ETHTOOL_GREGS:
2686                 rc = ethtool_get_regs(dev, useraddr);
2687                 break;
2688         case ETHTOOL_GWOL:
2689                 rc = ethtool_get_wol(dev, useraddr);
2690                 break;
2691         case ETHTOOL_SWOL:
2692                 rc = ethtool_set_wol(dev, useraddr);
2693                 break;
2694         case ETHTOOL_GMSGLVL:
2695                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2696                                        dev->ethtool_ops->get_msglevel);
2697                 break;
2698         case ETHTOOL_SMSGLVL:
2699                 rc = ethtool_set_value_void(dev, useraddr,
2700                                        dev->ethtool_ops->set_msglevel);
2701                 break;
2702         case ETHTOOL_GEEE:
2703                 rc = ethtool_get_eee(dev, useraddr);
2704                 break;
2705         case ETHTOOL_SEEE:
2706                 rc = ethtool_set_eee(dev, useraddr);
2707                 break;
2708         case ETHTOOL_NWAY_RST:
2709                 rc = ethtool_nway_reset(dev);
2710                 break;
2711         case ETHTOOL_GLINK:
2712                 rc = ethtool_get_link(dev, useraddr);
2713                 break;
2714         case ETHTOOL_GEEPROM:
2715                 rc = ethtool_get_eeprom(dev, useraddr);
2716                 break;
2717         case ETHTOOL_SEEPROM:
2718                 rc = ethtool_set_eeprom(dev, useraddr);
2719                 break;
2720         case ETHTOOL_GCOALESCE:
2721                 rc = ethtool_get_coalesce(dev, useraddr);
2722                 break;
2723         case ETHTOOL_SCOALESCE:
2724                 rc = ethtool_set_coalesce(dev, useraddr);
2725                 break;
2726         case ETHTOOL_GRINGPARAM:
2727                 rc = ethtool_get_ringparam(dev, useraddr);
2728                 break;
2729         case ETHTOOL_SRINGPARAM:
2730                 rc = ethtool_set_ringparam(dev, useraddr);
2731                 break;
2732         case ETHTOOL_GPAUSEPARAM:
2733                 rc = ethtool_get_pauseparam(dev, useraddr);
2734                 break;
2735         case ETHTOOL_SPAUSEPARAM:
2736                 rc = ethtool_set_pauseparam(dev, useraddr);
2737                 break;
2738         case ETHTOOL_TEST:
2739                 rc = ethtool_self_test(dev, useraddr);
2740                 break;
2741         case ETHTOOL_GSTRINGS:
2742                 rc = ethtool_get_strings(dev, useraddr);
2743                 break;
2744         case ETHTOOL_PHYS_ID:
2745                 rc = ethtool_phys_id(dev, useraddr);
2746                 break;
2747         case ETHTOOL_GSTATS:
2748                 rc = ethtool_get_stats(dev, useraddr);
2749                 break;
2750         case ETHTOOL_GPERMADDR:
2751                 rc = ethtool_get_perm_addr(dev, useraddr);
2752                 break;
2753         case ETHTOOL_GFLAGS:
2754                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2755                                         __ethtool_get_flags);
2756                 break;
2757         case ETHTOOL_SFLAGS:
2758                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2759                 break;
2760         case ETHTOOL_GPFLAGS:
2761                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2762                                        dev->ethtool_ops->get_priv_flags);
2763                 break;
2764         case ETHTOOL_SPFLAGS:
2765                 rc = ethtool_set_value(dev, useraddr,
2766                                        dev->ethtool_ops->set_priv_flags);
2767                 break;
2768         case ETHTOOL_GRXFH:
2769         case ETHTOOL_GRXRINGS:
2770         case ETHTOOL_GRXCLSRLCNT:
2771         case ETHTOOL_GRXCLSRULE:
2772         case ETHTOOL_GRXCLSRLALL:
2773                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2774                 break;
2775         case ETHTOOL_SRXFH:
2776         case ETHTOOL_SRXCLSRLDEL:
2777         case ETHTOOL_SRXCLSRLINS:
2778                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2779                 break;
2780         case ETHTOOL_FLASHDEV:
2781                 rc = ethtool_flash_device(dev, useraddr);
2782                 break;
2783         case ETHTOOL_RESET:
2784                 rc = ethtool_reset(dev, useraddr);
2785                 break;
2786         case ETHTOOL_GSSET_INFO:
2787                 rc = ethtool_get_sset_info(dev, useraddr);
2788                 break;
2789         case ETHTOOL_GRXFHINDIR:
2790                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2791                 break;
2792         case ETHTOOL_SRXFHINDIR:
2793                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2794                 break;
2795         case ETHTOOL_GRSSH:
2796                 rc = ethtool_get_rxfh(dev, useraddr);
2797                 break;
2798         case ETHTOOL_SRSSH:
2799                 rc = ethtool_set_rxfh(dev, useraddr);
2800                 break;
2801         case ETHTOOL_GFEATURES:
2802                 rc = ethtool_get_features(dev, useraddr);
2803                 break;
2804         case ETHTOOL_SFEATURES:
2805                 rc = ethtool_set_features(dev, useraddr);
2806                 break;
2807         case ETHTOOL_GTXCSUM:
2808         case ETHTOOL_GRXCSUM:
2809         case ETHTOOL_GSG:
2810         case ETHTOOL_GTSO:
2811         case ETHTOOL_GGSO:
2812         case ETHTOOL_GGRO:
2813                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2814                 break;
2815         case ETHTOOL_STXCSUM:
2816         case ETHTOOL_SRXCSUM:
2817         case ETHTOOL_SSG:
2818         case ETHTOOL_STSO:
2819         case ETHTOOL_SGSO:
2820         case ETHTOOL_SGRO:
2821                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2822                 break;
2823         case ETHTOOL_GCHANNELS:
2824                 rc = ethtool_get_channels(dev, useraddr);
2825                 break;
2826         case ETHTOOL_SCHANNELS:
2827                 rc = ethtool_set_channels(dev, useraddr);
2828                 break;
2829         case ETHTOOL_SET_DUMP:
2830                 rc = ethtool_set_dump(dev, useraddr);
2831                 break;
2832         case ETHTOOL_GET_DUMP_FLAG:
2833                 rc = ethtool_get_dump_flag(dev, useraddr);
2834                 break;
2835         case ETHTOOL_GET_DUMP_DATA:
2836                 rc = ethtool_get_dump_data(dev, useraddr);
2837                 break;
2838         case ETHTOOL_GET_TS_INFO:
2839                 rc = ethtool_get_ts_info(dev, useraddr);
2840                 break;
2841         case ETHTOOL_GMODULEINFO:
2842                 rc = ethtool_get_module_info(dev, useraddr);
2843                 break;
2844         case ETHTOOL_GMODULEEEPROM:
2845                 rc = ethtool_get_module_eeprom(dev, useraddr);
2846                 break;
2847         case ETHTOOL_GTUNABLE:
2848                 rc = ethtool_get_tunable(dev, useraddr);
2849                 break;
2850         case ETHTOOL_STUNABLE:
2851                 rc = ethtool_set_tunable(dev, useraddr);
2852                 break;
2853         case ETHTOOL_GPHYSTATS:
2854                 rc = ethtool_get_phy_stats(dev, useraddr);
2855                 break;
2856         case ETHTOOL_PERQUEUE:
2857                 rc = ethtool_set_per_queue(dev, useraddr);
2858                 break;
2859         case ETHTOOL_GLINKSETTINGS:
2860                 rc = ethtool_get_link_ksettings(dev, useraddr);
2861                 break;
2862         case ETHTOOL_SLINKSETTINGS:
2863                 rc = ethtool_set_link_ksettings(dev, useraddr);
2864                 break;
2865         case ETHTOOL_PHY_GTUNABLE:
2866                 rc = get_phy_tunable(dev, useraddr);
2867                 break;
2868         case ETHTOOL_PHY_STUNABLE:
2869                 rc = set_phy_tunable(dev, useraddr);
2870                 break;
2871         case ETHTOOL_GFECPARAM:
2872                 rc = ethtool_get_fecparam(dev, useraddr);
2873                 break;
2874         case ETHTOOL_SFECPARAM:
2875                 rc = ethtool_set_fecparam(dev, useraddr);
2876                 break;
2877         default:
2878                 rc = -EOPNOTSUPP;
2879         }
2880
2881         if (dev->ethtool_ops->complete)
2882                 dev->ethtool_ops->complete(dev);
2883
2884         if (old_features != dev->features)
2885                 netdev_features_change(dev);
2886
2887         return rc;
2888 }