net/core/ethtool.c

   1 /*
   2  * net/core/ethtool.c - Ethtool ioctl handler
   3  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   4  *
   5  * This file is where we call all the ethtool_ops commands to get
   6  * the information ethtool needs.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/capability.h>
  17 #include <linux/errno.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/net_tstamp.h>
  21 #include <linux/phy.h>
  22 #include <linux/bitops.h>
  23 #include <linux/uaccess.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/slab.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/sched.h>
  28 #include <linux/net.h>
  29
  30 /*
  31  * Some useful ethtool_ops methods that're device independent.
  32  * If we find that all drivers want to do the same thing here,
  33  * we can turn these into dev_() function calls.
  34  */
  35
  36 u32 ethtool_op_get_link(struct net_device *dev)
  37 {
  38         return netif_carrier_ok(dev) ? 1 : 0;
  39 }
  40 EXPORT_SYMBOL(ethtool_op_get_link);
  41
  42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  43 {
  44         info->so_timestamping =
  45                 SOF_TIMESTAMPING_TX_SOFTWARE |
  46                 SOF_TIMESTAMPING_RX_SOFTWARE |
  47                 SOF_TIMESTAMPING_SOFTWARE;
  48         info->phc_index = -1;
  49         return 0;
  50 }
  51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  52
  53 /* Handlers for each ethtool command */
  54
  55 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
  56
  57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
  58         [NETIF_F_SG_BIT] =               "tx-scatter-gather",
  59         [NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
  60         [NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
  61         [NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
  62         [NETIF_F_HIGHDMA_BIT] =          "highdma",
  63         [NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
  64         [NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
  65
  66         [NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
  67         [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
  68         [NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
  69         [NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
  70         [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
  71         [NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
  72         [NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
  73         [NETIF_F_LLTX_BIT] =             "tx-lockless",
  74         [NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
  75         [NETIF_F_GRO_BIT] =              "rx-gro",
  76         [NETIF_F_LRO_BIT] =              "rx-lro",
  77
  78         [NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
  79         [NETIF_F_UFO_BIT] =              "tx-udp-fragmentation",
  80         [NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
  81         [NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
  82         [NETIF_F_TSO_MANGLEID_BIT] =     "tx-tcp-mangleid-segmentation",
  83         [NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
  84         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
  85         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
  86         [NETIF_F_GSO_GRE_CSUM_BIT] =     "tx-gre-csum-segmentation",
  87         [NETIF_F_GSO_IPXIP4_BIT] =       "tx-ipxip4-segmentation",
  88         [NETIF_F_GSO_IPXIP6_BIT] =       "tx-ipxip6-segmentation",
  89         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
  90         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
  91         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
  92         [NETIF_F_GSO_SCTP_BIT] =         "tx-sctp-segmentation",
  93
  94         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
  95         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
  96         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
  97         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
  98         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
  99         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
 100         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
 101         [NETIF_F_LOOPBACK_BIT] =         "loopback",
 102         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
 103         [NETIF_F_RXALL_BIT] =            "rx-all",
 104         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
 105         [NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
 106         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
 107 };
 108
 109 static const char
 110 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
 111         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
 112         [ETH_RSS_HASH_XOR_BIT] =        "xor",
 113 };
 114
 115 static const char
 116 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 117         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 118         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
 119         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
 120 };
 121
 122 static const char
 123 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 124         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 125         [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
 126 };
 127
 128 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 129 {
 130         struct ethtool_gfeatures cmd = {
 131                 .cmd = ETHTOOL_GFEATURES,
 132                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 133         };
 134         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 135         u32 __user *sizeaddr;
 136         u32 copy_size;
 137         int i;
 138
 139         /* in case feature bits run out again */
 140         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
 141
 142         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 143                 features[i].available = (u32)(dev->hw_features >> (32 * i));
 144                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 145                 features[i].active = (u32)(dev->features >> (32 * i));
 146                 features[i].never_changed =
 147                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 148         }
 149
 150         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 151         if (get_user(copy_size, sizeaddr))
 152                 return -EFAULT;
 153
 154         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 155                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 156
 157         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 158                 return -EFAULT;
 159         useraddr += sizeof(cmd);
 160         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 161                 return -EFAULT;
 162
 163         return 0;
 164 }
 165
 166 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 167 {
 168         struct ethtool_sfeatures cmd;
 169         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 170         netdev_features_t wanted = 0, valid = 0;
 171         int i, ret = 0;
 172
 173         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 174                 return -EFAULT;
 175         useraddr += sizeof(cmd);
 176
 177         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 178                 return -EINVAL;
 179
 180         if (copy_from_user(features, useraddr, sizeof(features)))
 181                 return -EFAULT;
 182
 183         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 184                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 185                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 186         }
 187
 188         if (valid & ~NETIF_F_ETHTOOL_BITS)
 189                 return -EINVAL;
 190
 191         if (valid & ~dev->hw_features) {
 192                 valid &= dev->hw_features;
 193                 ret |= ETHTOOL_F_UNSUPPORTED;
 194         }
 195
 196         dev->wanted_features &= ~valid;
 197         dev->wanted_features |= wanted & valid;
 198         __netdev_update_features(dev);
 199
 200         if ((dev->wanted_features ^ dev->features) & valid)
 201                 ret |= ETHTOOL_F_WISH;
 202
 203         return ret;
 204 }
 205
 206 static int phy_get_sset_count(struct phy_device *phydev)
 207 {
 208         int ret;
 209
 210         if (phydev->drv->get_sset_count &&
 211             phydev->drv->get_strings &&
 212             phydev->drv->get_stats) {
 213                 mutex_lock(&phydev->lock);
 214                 ret = phydev->drv->get_sset_count(phydev);
 215                 mutex_unlock(&phydev->lock);
 216
 217                 return ret;
 218         }
 219
 220         return -EOPNOTSUPP;
 221 }
 222
 223 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 224 {
 225         const struct ethtool_ops *ops = dev->ethtool_ops;
 226
 227         if (sset == ETH_SS_FEATURES)
 228                 return ARRAY_SIZE(netdev_features_strings);
 229
 230         if (sset == ETH_SS_RSS_HASH_FUNCS)
 231                 return ARRAY_SIZE(rss_hash_func_strings);
 232
 233         if (sset == ETH_SS_TUNABLES)
 234                 return ARRAY_SIZE(tunable_strings);
 235
 236         if (sset == ETH_SS_PHY_TUNABLES)
 237                 return ARRAY_SIZE(phy_tunable_strings);
 238
 239         if (sset == ETH_SS_PHY_STATS) {
 240                 if (dev->phydev)
 241                         return phy_get_sset_count(dev->phydev);
 242                 else
 243                         return -EOPNOTSUPP;
 244         }
 245
 246         if (ops->get_sset_count && ops->get_strings)
 247                 return ops->get_sset_count(dev, sset);
 248         else
 249                 return -EOPNOTSUPP;
 250 }
 251
 252 static void __ethtool_get_strings(struct net_device *dev,
 253         u32 stringset, u8 *data)
 254 {
 255         const struct ethtool_ops *ops = dev->ethtool_ops;
 256
 257         if (stringset == ETH_SS_FEATURES)
 258                 memcpy(data, netdev_features_strings,
 259                         sizeof(netdev_features_strings));
 260         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 261                 memcpy(data, rss_hash_func_strings,
 262                        sizeof(rss_hash_func_strings));
 263         else if (stringset == ETH_SS_TUNABLES)
 264                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 265         else if (stringset == ETH_SS_PHY_TUNABLES)
 266                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 267         else if (stringset == ETH_SS_PHY_STATS) {
 268                 struct phy_device *phydev = dev->phydev;
 269
 270                 if (phydev) {
 271                         mutex_lock(&phydev->lock);
 272                         phydev->drv->get_strings(phydev, data);
 273                         mutex_unlock(&phydev->lock);
 274                 } else {
 275                         return;
 276                 }
 277         } else
 278                 /* ops->get_strings is valid because checked earlier */
 279                 ops->get_strings(dev, stringset, data);
 280 }
 281
 282 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 283 {
 284         /* feature masks of legacy discrete ethtool ops */
 285
 286         switch (eth_cmd) {
 287         case ETHTOOL_GTXCSUM:
 288         case ETHTOOL_STXCSUM:
 289                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 290         case ETHTOOL_GRXCSUM:
 291         case ETHTOOL_SRXCSUM:
 292                 return NETIF_F_RXCSUM;
 293         case ETHTOOL_GSG:
 294         case ETHTOOL_SSG:
 295                 return NETIF_F_SG;
 296         case ETHTOOL_GTSO:
 297         case ETHTOOL_STSO:
 298                 return NETIF_F_ALL_TSO;
 299         case ETHTOOL_GUFO:
 300         case ETHTOOL_SUFO:
 301                 return NETIF_F_UFO;
 302         case ETHTOOL_GGSO:
 303         case ETHTOOL_SGSO:
 304                 return NETIF_F_GSO;
 305         case ETHTOOL_GGRO:
 306         case ETHTOOL_SGRO:
 307                 return NETIF_F_GRO;
 308         default:
 309                 BUG();
 310         }
 311 }
 312
 313 static int ethtool_get_one_feature(struct net_device *dev,
 314         char __user *useraddr, u32 ethcmd)
 315 {
 316         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 317         struct ethtool_value edata = {
 318                 .cmd = ethcmd,
 319                 .data = !!(dev->features & mask),
 320         };
 321
 322         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 323                 return -EFAULT;
 324         return 0;
 325 }
 326
 327 static int ethtool_set_one_feature(struct net_device *dev,
 328         void __user *useraddr, u32 ethcmd)
 329 {
 330         struct ethtool_value edata;
 331         netdev_features_t mask;
 332
 333         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 334                 return -EFAULT;
 335
 336         mask = ethtool_get_feature_mask(ethcmd);
 337         mask &= dev->hw_features;
 338         if (!mask)
 339                 return -EOPNOTSUPP;
 340
 341         if (edata.data)
 342                 dev->wanted_features |= mask;
 343         else
 344                 dev->wanted_features &= ~mask;
 345
 346         __netdev_update_features(dev);
 347
 348         return 0;
 349 }
 350
 351 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 352                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 353 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 354                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 355                           NETIF_F_RXHASH)
 356
 357 static u32 __ethtool_get_flags(struct net_device *dev)
 358 {
 359         u32 flags = 0;
 360
 361         if (dev->features & NETIF_F_LRO)
 362                 flags |= ETH_FLAG_LRO;
 363         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 364                 flags |= ETH_FLAG_RXVLAN;
 365         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 366                 flags |= ETH_FLAG_TXVLAN;
 367         if (dev->features & NETIF_F_NTUPLE)
 368                 flags |= ETH_FLAG_NTUPLE;
 369         if (dev->features & NETIF_F_RXHASH)
 370                 flags |= ETH_FLAG_RXHASH;
 371
 372         return flags;
 373 }
 374
 375 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 376 {
 377         netdev_features_t features = 0, changed;
 378
 379         if (data & ~ETH_ALL_FLAGS)
 380                 return -EINVAL;
 381
 382         if (data & ETH_FLAG_LRO)
 383                 features |= NETIF_F_LRO;
 384         if (data & ETH_FLAG_RXVLAN)
 385                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 386         if (data & ETH_FLAG_TXVLAN)
 387                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 388         if (data & ETH_FLAG_NTUPLE)
 389                 features |= NETIF_F_NTUPLE;
 390         if (data & ETH_FLAG_RXHASH)
 391                 features |= NETIF_F_RXHASH;
 392
 393         /* allow changing only bits set in hw_features */
 394         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 395         if (changed & ~dev->hw_features)
 396                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 397
 398         dev->wanted_features =
 399                 (dev->wanted_features & ~changed) | (features & changed);
 400
 401         __netdev_update_features(dev);
 402
 403         return 0;
 404 }
 405
 406 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 407                                              u32 legacy_u32)
 408 {
 409         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 410         dst[0] = legacy_u32;
 411 }
 412 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 413
 414 /* return false if src had higher bits set. lower bits always updated. */
 415 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 416                                              const unsigned long *src)
 417 {
 418         bool retval = true;
 419
 420         /* TODO: following test will soon always be true */
 421         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 422                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 423
 424                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 425                 bitmap_fill(ext, 32);
 426                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 427                 if (bitmap_intersects(ext, src,
 428                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 429                         /* src mask goes beyond bit 31 */
 430                         retval = false;
 431                 }
 432         }
 433         *legacy_u32 = src[0];
 434         return retval;
 435 }
 436 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 437
 438 /* return false if legacy contained non-0 deprecated fields
 439  * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
 440  */
 441 static bool
 442 convert_legacy_settings_to_link_ksettings(
 443         struct ethtool_link_ksettings *link_ksettings,
 444         const struct ethtool_cmd *legacy_settings)
 445 {
 446         bool retval = true;
 447
 448         memset(link_ksettings, 0, sizeof(*link_ksettings));
 449
 450         /* This is used to tell users that driver is still using these
 451          * deprecated legacy fields, and they should not use
 452          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
 453          */
 454         if (legacy_settings->transceiver ||
 455             legacy_settings->maxtxpkt ||
 456             legacy_settings->maxrxpkt)
 457                 retval = false;
 458
 459         ethtool_convert_legacy_u32_to_link_mode(
 460                 link_ksettings->link_modes.supported,
 461                 legacy_settings->supported);
 462         ethtool_convert_legacy_u32_to_link_mode(
 463                 link_ksettings->link_modes.advertising,
 464                 legacy_settings->advertising);
 465         ethtool_convert_legacy_u32_to_link_mode(
 466                 link_ksettings->link_modes.lp_advertising,
 467                 legacy_settings->lp_advertising);
 468         link_ksettings->base.speed
 469                 = ethtool_cmd_speed(legacy_settings);
 470         link_ksettings->base.duplex
 471                 = legacy_settings->duplex;
 472         link_ksettings->base.port
 473                 = legacy_settings->port;
 474         link_ksettings->base.phy_address
 475                 = legacy_settings->phy_address;
 476         link_ksettings->base.autoneg
 477                 = legacy_settings->autoneg;
 478         link_ksettings->base.mdio_support
 479                 = legacy_settings->mdio_support;
 480         link_ksettings->base.eth_tp_mdix
 481                 = legacy_settings->eth_tp_mdix;
 482         link_ksettings->base.eth_tp_mdix_ctrl
 483                 = legacy_settings->eth_tp_mdix_ctrl;
 484         return retval;
 485 }
 486
 487 /* return false if ksettings link modes had higher bits
 488  * set. legacy_settings always updated (best effort)
 489  */
 490 static bool
 491 convert_link_ksettings_to_legacy_settings(
 492         struct ethtool_cmd *legacy_settings,
 493         const struct ethtool_link_ksettings *link_ksettings)
 494 {
 495         bool retval = true;
 496
 497         memset(legacy_settings, 0, sizeof(*legacy_settings));
 498         /* this also clears the deprecated fields in legacy structure:
 499          * __u8         transceiver;
 500          * __u32        maxtxpkt;
 501          * __u32        maxrxpkt;
 502          */
 503
 504         retval &= ethtool_convert_link_mode_to_legacy_u32(
 505                 &legacy_settings->supported,
 506                 link_ksettings->link_modes.supported);
 507         retval &= ethtool_convert_link_mode_to_legacy_u32(
 508                 &legacy_settings->advertising,
 509                 link_ksettings->link_modes.advertising);
 510         retval &= ethtool_convert_link_mode_to_legacy_u32(
 511                 &legacy_settings->lp_advertising,
 512                 link_ksettings->link_modes.lp_advertising);
 513         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 514         legacy_settings->duplex
 515                 = link_ksettings->base.duplex;
 516         legacy_settings->port
 517                 = link_ksettings->base.port;
 518         legacy_settings->phy_address
 519                 = link_ksettings->base.phy_address;
 520         legacy_settings->autoneg
 521                 = link_ksettings->base.autoneg;
 522         legacy_settings->mdio_support
 523                 = link_ksettings->base.mdio_support;
 524         legacy_settings->eth_tp_mdix
 525                 = link_ksettings->base.eth_tp_mdix;
 526         legacy_settings->eth_tp_mdix_ctrl
 527                 = link_ksettings->base.eth_tp_mdix_ctrl;
 528         return retval;
 529 }
 530
 531 /* number of 32-bit words to store the user's link mode bitmaps */
 532 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 533         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 534
 535 /* layout of the struct passed from/to userland */
 536 struct ethtool_link_usettings {
 537         struct ethtool_link_settings base;
 538         struct {
 539                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 540                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 541                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 542         } link_modes;
 543 };
 544
 545 /* Internal kernel helper to query a device ethtool_link_settings.
 546  *
 547  * Backward compatibility note: for compatibility with legacy drivers
 548  * that implement only the ethtool_cmd API, this has to work with both
 549  * drivers implementing get_link_ksettings API and drivers
 550  * implementing get_settings API. When drivers implement get_settings
 551  * and report ethtool_cmd deprecated fields
 552  * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
 553  * because the resulting struct ethtool_link_settings does not report them.
 554  */
 555 int __ethtool_get_link_ksettings(struct net_device *dev,
 556                                  struct ethtool_link_ksettings *link_ksettings)
 557 {
 558         int err;
 559         struct ethtool_cmd cmd;
 560
 561         ASSERT_RTNL();
 562
 563         if (dev->ethtool_ops->get_link_ksettings) {
 564                 memset(link_ksettings, 0, sizeof(*link_ksettings));
 565                 return dev->ethtool_ops->get_link_ksettings(dev,
 566                                                             link_ksettings);
 567         }
 568
 569         /* driver doesn't support %ethtool_link_ksettings API. revert to
 570          * legacy %ethtool_cmd API, unless it's not supported either.
 571          * TODO: remove when ethtool_ops::get_settings disappears internally
 572          */
 573         if (!dev->ethtool_ops->get_settings)
 574                 return -EOPNOTSUPP;
 575
 576         memset(&cmd, 0, sizeof(cmd));
 577         cmd.cmd = ETHTOOL_GSET;
 578         err = dev->ethtool_ops->get_settings(dev, &cmd);
 579         if (err < 0)
 580                 return err;
 581
 582         /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
 583          */
 584         convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
 585         return err;
 586 }
 587 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 588
 589 /* convert ethtool_link_usettings in user space to a kernel internal
 590  * ethtool_link_ksettings. return 0 on success, errno on error.
 591  */
 592 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 593                                          const void __user *from)
 594 {
 595         struct ethtool_link_usettings link_usettings;
 596
 597         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 598                 return -EFAULT;
 599
 600         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 601         bitmap_from_u32array(to->link_modes.supported,
 602                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 603                              link_usettings.link_modes.supported,
 604                              __ETHTOOL_LINK_MODE_MASK_NU32);
 605         bitmap_from_u32array(to->link_modes.advertising,
 606                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 607                              link_usettings.link_modes.advertising,
 608                              __ETHTOOL_LINK_MODE_MASK_NU32);
 609         bitmap_from_u32array(to->link_modes.lp_advertising,
 610                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 611                              link_usettings.link_modes.lp_advertising,
 612                              __ETHTOOL_LINK_MODE_MASK_NU32);
 613
 614         return 0;
 615 }
 616
 617 /* convert a kernel internal ethtool_link_ksettings to
 618  * ethtool_link_usettings in user space. return 0 on success, errno on
 619  * error.
 620  */
 621 static int
 622 store_link_ksettings_for_user(void __user *to,
 623                               const struct ethtool_link_ksettings *from)
 624 {
 625         struct ethtool_link_usettings link_usettings;
 626
 627         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 628         bitmap_to_u32array(link_usettings.link_modes.supported,
 629                            __ETHTOOL_LINK_MODE_MASK_NU32,
 630                            from->link_modes.supported,
 631                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 632         bitmap_to_u32array(link_usettings.link_modes.advertising,
 633                            __ETHTOOL_LINK_MODE_MASK_NU32,
 634                            from->link_modes.advertising,
 635                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 636         bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
 637                            __ETHTOOL_LINK_MODE_MASK_NU32,
 638                            from->link_modes.lp_advertising,
 639                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 640
 641         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 642                 return -EFAULT;
 643
 644         return 0;
 645 }
 646
 647 /* Query device for its ethtool_link_settings.
 648  *
 649  * Backward compatibility note: this function must fail when driver
 650  * does not implement ethtool::get_link_ksettings, even if legacy
 651  * ethtool_ops::get_settings is implemented. This tells new versions
 652  * of ethtool that they should use the legacy API %ETHTOOL_GSET for
 653  * this driver, so that they can correctly access the ethtool_cmd
 654  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 655  * implements ethtool_ops::get_settings anymore.
 656  */
 657 static int ethtool_get_link_ksettings(struct net_device *dev,
 658                                       void __user *useraddr)
 659 {
 660         int err = 0;
 661         struct ethtool_link_ksettings link_ksettings;
 662
 663         ASSERT_RTNL();
 664
 665         if (!dev->ethtool_ops->get_link_ksettings)
 666                 return -EOPNOTSUPP;
 667
 668         /* handle bitmap nbits handshake */
 669         if (copy_from_user(&link_ksettings.base, useraddr,
 670                            sizeof(link_ksettings.base)))
 671                 return -EFAULT;
 672
 673         if (__ETHTOOL_LINK_MODE_MASK_NU32
 674             != link_ksettings.base.link_mode_masks_nwords) {
 675                 /* wrong link mode nbits requested */
 676                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 677                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 678                 /* send back number of words required as negative val */
 679                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 680                                    "need too many bits for link modes!");
 681                 link_ksettings.base.link_mode_masks_nwords
 682                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 683
 684                 /* copy the base fields back to user, not the link
 685                  * mode bitmaps
 686                  */
 687                 if (copy_to_user(useraddr, &link_ksettings.base,
 688                                  sizeof(link_ksettings.base)))
 689                         return -EFAULT;
 690
 691                 return 0;
 692         }
 693
 694         /* handshake successful: user/kernel agree on
 695          * link_mode_masks_nwords
 696          */
 697
 698         memset(&link_ksettings, 0, sizeof(link_ksettings));
 699         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 700         if (err < 0)
 701                 return err;
 702
 703         /* make sure we tell the right values to user */
 704         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 705         link_ksettings.base.link_mode_masks_nwords
 706                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 707
 708         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 709 }
 710
 711 /* Update device ethtool_link_settings.
 712  *
 713  * Backward compatibility note: this function must fail when driver
 714  * does not implement ethtool::set_link_ksettings, even if legacy
 715  * ethtool_ops::set_settings is implemented. This tells new versions
 716  * of ethtool that they should use the legacy API %ETHTOOL_SSET for
 717  * this driver, so that they can correctly update the ethtool_cmd
 718  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 719  * implements ethtool_ops::get_settings anymore.
 720  */
 721 static int ethtool_set_link_ksettings(struct net_device *dev,
 722                                       void __user *useraddr)
 723 {
 724         int err;
 725         struct ethtool_link_ksettings link_ksettings;
 726
 727         ASSERT_RTNL();
 728
 729         if (!dev->ethtool_ops->set_link_ksettings)
 730                 return -EOPNOTSUPP;
 731
 732         /* make sure nbits field has expected value */
 733         if (copy_from_user(&link_ksettings.base, useraddr,
 734                            sizeof(link_ksettings.base)))
 735                 return -EFAULT;
 736
 737         if (__ETHTOOL_LINK_MODE_MASK_NU32
 738             != link_ksettings.base.link_mode_masks_nwords)
 739                 return -EINVAL;
 740
 741         /* copy the whole structure, now that we know it has expected
 742          * format
 743          */
 744         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 745         if (err)
 746                 return err;
 747
 748         /* re-check nwords field, just in case */
 749         if (__ETHTOOL_LINK_MODE_MASK_NU32
 750             != link_ksettings.base.link_mode_masks_nwords)
 751                 return -EINVAL;
 752
 753         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 754 }
 755
 756 static void
 757 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
 758 {
 759         char name[sizeof(current->comm)];
 760
 761         pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
 762                      get_task_comm(name, current), details);
 763 }
 764
 765 /* Query device for its ethtool_cmd settings.
 766  *
 767  * Backward compatibility note: for compatibility with legacy ethtool,
 768  * this has to work with both drivers implementing get_link_ksettings
 769  * API and drivers implementing get_settings API. When drivers
 770  * implement get_link_ksettings and report higher link mode bits, a
 771  * kernel warning is logged once (with name of 1st driver/device) to
 772  * recommend user to upgrade ethtool, but the command is successful
 773  * (only the lower link mode bits reported back to user).
 774  */
 775 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 776 {
 777         struct ethtool_cmd cmd;
 778
 779         ASSERT_RTNL();
 780
 781         if (dev->ethtool_ops->get_link_ksettings) {
 782                 /* First, use link_ksettings API if it is supported */
 783                 int err;
 784                 struct ethtool_link_ksettings link_ksettings;
 785
 786                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 787                 err = dev->ethtool_ops->get_link_ksettings(dev,
 788                                                            &link_ksettings);
 789                 if (err < 0)
 790                         return err;
 791                 if (!convert_link_ksettings_to_legacy_settings(&cmd,
 792                                                                &link_ksettings))
 793                         warn_incomplete_ethtool_legacy_settings_conversion(
 794                                 "link modes are only partially reported");
 795
 796                 /* send a sensible cmd tag back to user */
 797                 cmd.cmd = ETHTOOL_GSET;
 798         } else {
 799                 /* driver doesn't support %ethtool_link_ksettings
 800                  * API. revert to legacy %ethtool_cmd API, unless it's
 801                  * not supported either.
 802                  */
 803                 int err;
 804
 805                 if (!dev->ethtool_ops->get_settings)
 806                         return -EOPNOTSUPP;
 807
 808                 memset(&cmd, 0, sizeof(cmd));
 809                 cmd.cmd = ETHTOOL_GSET;
 810                 err = dev->ethtool_ops->get_settings(dev, &cmd);
 811                 if (err < 0)
 812                         return err;
 813         }
 814
 815         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 816                 return -EFAULT;
 817
 818         return 0;
 819 }
 820
 821 /* Update device link settings with given ethtool_cmd.
 822  *
 823  * Backward compatibility note: for compatibility with legacy ethtool,
 824  * this has to work with both drivers implementing set_link_ksettings
 825  * API and drivers implementing set_settings API. When drivers
 826  * implement set_link_ksettings and user's request updates deprecated
 827  * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 828  * warning is logged once (with name of 1st driver/device) to
 829  * recommend user to upgrade ethtool, and the request is rejected.
 830  */
 831 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 832 {
 833         struct ethtool_cmd cmd;
 834
 835         ASSERT_RTNL();
 836
 837         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 838                 return -EFAULT;
 839
 840         /* first, try new %ethtool_link_ksettings API. */
 841         if (dev->ethtool_ops->set_link_ksettings) {
 842                 struct ethtool_link_ksettings link_ksettings;
 843
 844                 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
 845                                                                &cmd))
 846                         return -EINVAL;
 847
 848                 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
 849                 link_ksettings.base.link_mode_masks_nwords
 850                         = __ETHTOOL_LINK_MODE_MASK_NU32;
 851                 return dev->ethtool_ops->set_link_ksettings(dev,
 852                                                             &link_ksettings);
 853         }
 854
 855         /* legacy %ethtool_cmd API */
 856
 857         /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
 858          * disappears internally
 859          */
 860
 861         if (!dev->ethtool_ops->set_settings)
 862                 return -EOPNOTSUPP;
 863
 864         return dev->ethtool_ops->set_settings(dev, &cmd);
 865 }
 866
 867 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 868                                                   void __user *useraddr)
 869 {
 870         struct ethtool_drvinfo info;
 871         const struct ethtool_ops *ops = dev->ethtool_ops;
 872
 873         memset(&info, 0, sizeof(info));
 874         info.cmd = ETHTOOL_GDRVINFO;
 875         if (ops->get_drvinfo) {
 876                 ops->get_drvinfo(dev, &info);
 877         } else if (dev->dev.parent && dev->dev.parent->driver) {
 878                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 879                         sizeof(info.bus_info));
 880                 strlcpy(info.driver, dev->dev.parent->driver->name,
 881                         sizeof(info.driver));
 882         } else {
 883                 return -EOPNOTSUPP;
 884         }
 885
 886         /*
 887          * this method of obtaining string set info is deprecated;
 888          * Use ETHTOOL_GSSET_INFO instead.
 889          */
 890         if (ops->get_sset_count) {
 891                 int rc;
 892
 893                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 894                 if (rc >= 0)
 895                         info.testinfo_len = rc;
 896                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 897                 if (rc >= 0)
 898                         info.n_stats = rc;
 899                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 900                 if (rc >= 0)
 901                         info.n_priv_flags = rc;
 902         }
 903         if (ops->get_regs_len)
 904                 info.regdump_len = ops->get_regs_len(dev);
 905         if (ops->get_eeprom_len)
 906                 info.eedump_len = ops->get_eeprom_len(dev);
 907
 908         if (copy_to_user(useraddr, &info, sizeof(info)))
 909                 return -EFAULT;
 910         return 0;
 911 }
 912
 913 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 914                                                     void __user *useraddr)
 915 {
 916         struct ethtool_sset_info info;
 917         u64 sset_mask;
 918         int i, idx = 0, n_bits = 0, ret, rc;
 919         u32 *info_buf = NULL;
 920
 921         if (copy_from_user(&info, useraddr, sizeof(info)))
 922                 return -EFAULT;
 923
 924         /* store copy of mask, because we zero struct later on */
 925         sset_mask = info.sset_mask;
 926         if (!sset_mask)
 927                 return 0;
 928
 929         /* calculate size of return buffer */
 930         n_bits = hweight64(sset_mask);
 931
 932         memset(&info, 0, sizeof(info));
 933         info.cmd = ETHTOOL_GSSET_INFO;
 934
 935         info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
 936         if (!info_buf)
 937                 return -ENOMEM;
 938
 939         /*
 940          * fill return buffer based on input bitmask and successful
 941          * get_sset_count return
 942          */
 943         for (i = 0; i < 64; i++) {
 944                 if (!(sset_mask & (1ULL << i)))
 945                         continue;
 946
 947                 rc = __ethtool_get_sset_count(dev, i);
 948                 if (rc >= 0) {
 949                         info.sset_mask |= (1ULL << i);
 950                         info_buf[idx++] = rc;
 951                 }
 952         }
 953
 954         ret = -EFAULT;
 955         if (copy_to_user(useraddr, &info, sizeof(info)))
 956                 goto out;
 957
 958         useraddr += offsetof(struct ethtool_sset_info, data);
 959         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 960                 goto out;
 961
 962         ret = 0;
 963
 964 out:
 965         kfree(info_buf);
 966         return ret;
 967 }
 968
 969 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 970                                                 u32 cmd, void __user *useraddr)
 971 {
 972         struct ethtool_rxnfc info;
 973         size_t info_size = sizeof(info);
 974         int rc;
 975
 976         if (!dev->ethtool_ops->set_rxnfc)
 977                 return -EOPNOTSUPP;
 978
 979         /* struct ethtool_rxnfc was originally defined for
 980          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 981          * members.  User-space might still be using that
 982          * definition. */
 983         if (cmd == ETHTOOL_SRXFH)
 984                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 985                              sizeof(info.data));
 986
 987         if (copy_from_user(&info, useraddr, info_size))
 988                 return -EFAULT;
 989
 990         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 991         if (rc)
 992                 return rc;
 993
 994         if (cmd == ETHTOOL_SRXCLSRLINS &&
 995             copy_to_user(useraddr, &info, info_size))
 996                 return -EFAULT;
 997
 998         return 0;
 999 }
1000
1001 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1002                                                 u32 cmd, void __user *useraddr)
1003 {
1004         struct ethtool_rxnfc info;
1005         size_t info_size = sizeof(info);
1006         const struct ethtool_ops *ops = dev->ethtool_ops;
1007         int ret;
1008         void *rule_buf = NULL;
1009
1010         if (!ops->get_rxnfc)
1011                 return -EOPNOTSUPP;
1012
1013         /* struct ethtool_rxnfc was originally defined for
1014          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1015          * members.  User-space might still be using that
1016          * definition. */
1017         if (cmd == ETHTOOL_GRXFH)
1018                 info_size = (offsetof(struct ethtool_rxnfc, data) +
1019                              sizeof(info.data));
1020
1021         if (copy_from_user(&info, useraddr, info_size))
1022                 return -EFAULT;
1023
1024         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1025                 if (info.rule_cnt > 0) {
1026                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1027                                 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1028                                                    GFP_USER);
1029                         if (!rule_buf)
1030                                 return -ENOMEM;
1031                 }
1032         }
1033
1034         ret = ops->get_rxnfc(dev, &info, rule_buf);
1035         if (ret < 0)
1036                 goto err_out;
1037
1038         ret = -EFAULT;
1039         if (copy_to_user(useraddr, &info, info_size))
1040                 goto err_out;
1041
1042         if (rule_buf) {
1043                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1044                 if (copy_to_user(useraddr, rule_buf,
1045                                  info.rule_cnt * sizeof(u32)))
1046                         goto err_out;
1047         }
1048         ret = 0;
1049
1050 err_out:
1051         kfree(rule_buf);
1052
1053         return ret;
1054 }
1055
1056 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1057                                         struct ethtool_rxnfc *rx_rings,
1058                                         u32 size)
1059 {
1060         int i;
1061
1062         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1063                 return -EFAULT;
1064
1065         /* Validate ring indices */
1066         for (i = 0; i < size; i++)
1067                 if (indir[i] >= rx_rings->data)
1068                         return -EINVAL;
1069
1070         return 0;
1071 }
1072
1073 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1074
1075 void netdev_rss_key_fill(void *buffer, size_t len)
1076 {
1077         BUG_ON(len > sizeof(netdev_rss_key));
1078         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1079         memcpy(buffer, netdev_rss_key, len);
1080 }
1081 EXPORT_SYMBOL(netdev_rss_key_fill);
1082
1083 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1084 {
1085         u32 dev_size, current_max = 0;
1086         u32 *indir;
1087         int ret;
1088
1089         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1090             !dev->ethtool_ops->get_rxfh)
1091                 return -EOPNOTSUPP;
1092         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1093         if (dev_size == 0)
1094                 return -EOPNOTSUPP;
1095
1096         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1097         if (!indir)
1098                 return -ENOMEM;
1099
1100         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1101         if (ret)
1102                 goto out;
1103
1104         while (dev_size--)
1105                 current_max = max(current_max, indir[dev_size]);
1106
1107         *max = current_max;
1108
1109 out:
1110         kfree(indir);
1111         return ret;
1112 }
1113
1114 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1115                                                      void __user *useraddr)
1116 {
1117         u32 user_size, dev_size;
1118         u32 *indir;
1119         int ret;
1120
1121         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1122             !dev->ethtool_ops->get_rxfh)
1123                 return -EOPNOTSUPP;
1124         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1125         if (dev_size == 0)
1126                 return -EOPNOTSUPP;
1127
1128         if (copy_from_user(&user_size,
1129                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1130                            sizeof(user_size)))
1131                 return -EFAULT;
1132
1133         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1134                          &dev_size, sizeof(dev_size)))
1135                 return -EFAULT;
1136
1137         /* If the user buffer size is 0, this is just a query for the
1138          * device table size.  Otherwise, if it's smaller than the
1139          * device table size it's an error.
1140          */
1141         if (user_size < dev_size)
1142                 return user_size == 0 ? 0 : -EINVAL;
1143
1144         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1145         if (!indir)
1146                 return -ENOMEM;
1147
1148         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1149         if (ret)
1150                 goto out;
1151
1152         if (copy_to_user(useraddr +
1153                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1154                          indir, dev_size * sizeof(indir[0])))
1155                 ret = -EFAULT;
1156
1157 out:
1158         kfree(indir);
1159         return ret;
1160 }
1161
1162 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1163                                                      void __user *useraddr)
1164 {
1165         struct ethtool_rxnfc rx_rings;
1166         u32 user_size, dev_size, i;
1167         u32 *indir;
1168         const struct ethtool_ops *ops = dev->ethtool_ops;
1169         int ret;
1170         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1171
1172         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1173             !ops->get_rxnfc)
1174                 return -EOPNOTSUPP;
1175
1176         dev_size = ops->get_rxfh_indir_size(dev);
1177         if (dev_size == 0)
1178                 return -EOPNOTSUPP;
1179
1180         if (copy_from_user(&user_size,
1181                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1182                            sizeof(user_size)))
1183                 return -EFAULT;
1184
1185         if (user_size != 0 && user_size != dev_size)
1186                 return -EINVAL;
1187
1188         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1189         if (!indir)
1190                 return -ENOMEM;
1191
1192         rx_rings.cmd = ETHTOOL_GRXRINGS;
1193         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1194         if (ret)
1195                 goto out;
1196
1197         if (user_size == 0) {
1198                 for (i = 0; i < dev_size; i++)
1199                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1200         } else {
1201                 ret = ethtool_copy_validate_indir(indir,
1202                                                   useraddr + ringidx_offset,
1203                                                   &rx_rings,
1204                                                   dev_size);
1205                 if (ret)
1206                         goto out;
1207         }
1208
1209         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1210         if (ret)
1211                 goto out;
1212
1213         /* indicate whether rxfh was set to default */
1214         if (user_size == 0)
1215                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1216         else
1217                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1218
1219 out:
1220         kfree(indir);
1221         return ret;
1222 }
1223
1224 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1225                                                void __user *useraddr)
1226 {
1227         int ret;
1228         const struct ethtool_ops *ops = dev->ethtool_ops;
1229         u32 user_indir_size, user_key_size;
1230         u32 dev_indir_size = 0, dev_key_size = 0;
1231         struct ethtool_rxfh rxfh;
1232         u32 total_size;
1233         u32 indir_bytes;
1234         u32 *indir = NULL;
1235         u8 dev_hfunc = 0;
1236         u8 *hkey = NULL;
1237         u8 *rss_config;
1238
1239         if (!ops->get_rxfh)
1240                 return -EOPNOTSUPP;
1241
1242         if (ops->get_rxfh_indir_size)
1243                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1244         if (ops->get_rxfh_key_size)
1245                 dev_key_size = ops->get_rxfh_key_size(dev);
1246
1247         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1248                 return -EFAULT;
1249         user_indir_size = rxfh.indir_size;
1250         user_key_size = rxfh.key_size;
1251
1252         /* Check that reserved fields are 0 for now */
1253         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1254             rxfh.rsvd8[2] || rxfh.rsvd32)
1255                 return -EINVAL;
1256
1257         rxfh.indir_size = dev_indir_size;
1258         rxfh.key_size = dev_key_size;
1259         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1260                 return -EFAULT;
1261
1262         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1263             (user_key_size && (user_key_size != dev_key_size)))
1264                 return -EINVAL;
1265
1266         indir_bytes = user_indir_size * sizeof(indir[0]);
1267         total_size = indir_bytes + user_key_size;
1268         rss_config = kzalloc(total_size, GFP_USER);
1269         if (!rss_config)
1270                 return -ENOMEM;
1271
1272         if (user_indir_size)
1273                 indir = (u32 *)rss_config;
1274
1275         if (user_key_size)
1276                 hkey = rss_config + indir_bytes;
1277
1278         ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1279         if (ret)
1280                 goto out;
1281
1282         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1283                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1284                 ret = -EFAULT;
1285         } else if (copy_to_user(useraddr +
1286                               offsetof(struct ethtool_rxfh, rss_config[0]),
1287                               rss_config, total_size)) {
1288                 ret = -EFAULT;
1289         }
1290 out:
1291         kfree(rss_config);
1292
1293         return ret;
1294 }
1295
1296 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1297                                                void __user *useraddr)
1298 {
1299         int ret;
1300         const struct ethtool_ops *ops = dev->ethtool_ops;
1301         struct ethtool_rxnfc rx_rings;
1302         struct ethtool_rxfh rxfh;
1303         u32 dev_indir_size = 0, dev_key_size = 0, i;
1304         u32 *indir = NULL, indir_bytes = 0;
1305         u8 *hkey = NULL;
1306         u8 *rss_config;
1307         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1308
1309         if (!ops->get_rxnfc || !ops->set_rxfh)
1310                 return -EOPNOTSUPP;
1311
1312         if (ops->get_rxfh_indir_size)
1313                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1314         if (ops->get_rxfh_key_size)
1315                 dev_key_size = ops->get_rxfh_key_size(dev);
1316
1317         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1318                 return -EFAULT;
1319
1320         /* Check that reserved fields are 0 for now */
1321         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1322             rxfh.rsvd8[2] || rxfh.rsvd32)
1323                 return -EINVAL;
1324
1325         /* If either indir, hash key or function is valid, proceed further.
1326          * Must request at least one change: indir size, hash key or function.
1327          */
1328         if ((rxfh.indir_size &&
1329              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1330              rxfh.indir_size != dev_indir_size) ||
1331             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1332             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1333              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1334                 return -EINVAL;
1335
1336         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1337                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1338
1339         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1340         if (!rss_config)
1341                 return -ENOMEM;
1342
1343         rx_rings.cmd = ETHTOOL_GRXRINGS;
1344         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1345         if (ret)
1346                 goto out;
1347
1348         /* rxfh.indir_size == 0 means reset the indir table to default.
1349          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1350          */
1351         if (rxfh.indir_size &&
1352             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1353                 indir = (u32 *)rss_config;
1354                 ret = ethtool_copy_validate_indir(indir,
1355                                                   useraddr + rss_cfg_offset,
1356                                                   &rx_rings,
1357                                                   rxfh.indir_size);
1358                 if (ret)
1359                         goto out;
1360         } else if (rxfh.indir_size == 0) {
1361                 indir = (u32 *)rss_config;
1362                 for (i = 0; i < dev_indir_size; i++)
1363                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1364         }
1365
1366         if (rxfh.key_size) {
1367                 hkey = rss_config + indir_bytes;
1368                 if (copy_from_user(hkey,
1369                                    useraddr + rss_cfg_offset + indir_bytes,
1370                                    rxfh.key_size)) {
1371                         ret = -EFAULT;
1372                         goto out;
1373                 }
1374         }
1375
1376         ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1377         if (ret)
1378                 goto out;
1379
1380         /* indicate whether rxfh was set to default */
1381         if (rxfh.indir_size == 0)
1382                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1383         else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1384                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1385
1386 out:
1387         kfree(rss_config);
1388         return ret;
1389 }
1390
1391 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1392 {
1393         struct ethtool_regs regs;
1394         const struct ethtool_ops *ops = dev->ethtool_ops;
1395         void *regbuf;
1396         int reglen, ret;
1397
1398         if (!ops->get_regs || !ops->get_regs_len)
1399                 return -EOPNOTSUPP;
1400
1401         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1402                 return -EFAULT;
1403
1404         reglen = ops->get_regs_len(dev);
1405         if (regs.len > reglen)
1406                 regs.len = reglen;
1407
1408         regbuf = vzalloc(reglen);
1409         if (reglen && !regbuf)
1410                 return -ENOMEM;
1411
1412         ops->get_regs(dev, &regs, regbuf);
1413
1414         ret = -EFAULT;
1415         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1416                 goto out;
1417         useraddr += offsetof(struct ethtool_regs, data);
1418         if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1419                 goto out;
1420         ret = 0;
1421
1422  out:
1423         vfree(regbuf);
1424         return ret;
1425 }
1426
1427 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1428 {
1429         struct ethtool_value reset;
1430         int ret;
1431
1432         if (!dev->ethtool_ops->reset)
1433                 return -EOPNOTSUPP;
1434
1435         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1436                 return -EFAULT;
1437
1438         ret = dev->ethtool_ops->reset(dev, &reset.data);
1439         if (ret)
1440                 return ret;
1441
1442         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1443                 return -EFAULT;
1444         return 0;
1445 }
1446
1447 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1448 {
1449         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1450
1451         if (!dev->ethtool_ops->get_wol)
1452                 return -EOPNOTSUPP;
1453
1454         dev->ethtool_ops->get_wol(dev, &wol);
1455
1456         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1457                 return -EFAULT;
1458         return 0;
1459 }
1460
1461 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1462 {
1463         struct ethtool_wolinfo wol;
1464
1465         if (!dev->ethtool_ops->set_wol)
1466                 return -EOPNOTSUPP;
1467
1468         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1469                 return -EFAULT;
1470
1471         return dev->ethtool_ops->set_wol(dev, &wol);
1472 }
1473
1474 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1475 {
1476         struct ethtool_eee edata;
1477         int rc;
1478
1479         if (!dev->ethtool_ops->get_eee)
1480                 return -EOPNOTSUPP;
1481
1482         memset(&edata, 0, sizeof(struct ethtool_eee));
1483         edata.cmd = ETHTOOL_GEEE;
1484         rc = dev->ethtool_ops->get_eee(dev, &edata);
1485
1486         if (rc)
1487                 return rc;
1488
1489         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1490                 return -EFAULT;
1491
1492         return 0;
1493 }
1494
1495 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1496 {
1497         struct ethtool_eee edata;
1498
1499         if (!dev->ethtool_ops->set_eee)
1500                 return -EOPNOTSUPP;
1501
1502         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1503                 return -EFAULT;
1504
1505         return dev->ethtool_ops->set_eee(dev, &edata);
1506 }
1507
1508 static int ethtool_nway_reset(struct net_device *dev)
1509 {
1510         if (!dev->ethtool_ops->nway_reset)
1511                 return -EOPNOTSUPP;
1512
1513         return dev->ethtool_ops->nway_reset(dev);
1514 }
1515
1516 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1517 {
1518         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1519
1520         if (!dev->ethtool_ops->get_link)
1521                 return -EOPNOTSUPP;
1522
1523         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1524
1525         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1526                 return -EFAULT;
1527         return 0;
1528 }
1529
1530 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1531                                   int (*getter)(struct net_device *,
1532                                                 struct ethtool_eeprom *, u8 *),
1533                                   u32 total_len)
1534 {
1535         struct ethtool_eeprom eeprom;
1536         void __user *userbuf = useraddr + sizeof(eeprom);
1537         u32 bytes_remaining;
1538         u8 *data;
1539         int ret = 0;
1540
1541         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1542                 return -EFAULT;
1543
1544         /* Check for wrap and zero */
1545         if (eeprom.offset + eeprom.len <= eeprom.offset)
1546                 return -EINVAL;
1547
1548         /* Check for exceeding total eeprom len */
1549         if (eeprom.offset + eeprom.len > total_len)
1550                 return -EINVAL;
1551
1552         data = kmalloc(PAGE_SIZE, GFP_USER);
1553         if (!data)
1554                 return -ENOMEM;
1555
1556         bytes_remaining = eeprom.len;
1557         while (bytes_remaining > 0) {
1558                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1559
1560                 ret = getter(dev, &eeprom, data);
1561                 if (ret)
1562                         break;
1563                 if (copy_to_user(userbuf, data, eeprom.len)) {
1564                         ret = -EFAULT;
1565                         break;
1566                 }
1567                 userbuf += eeprom.len;
1568                 eeprom.offset += eeprom.len;
1569                 bytes_remaining -= eeprom.len;
1570         }
1571
1572         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1573         eeprom.offset -= eeprom.len;
1574         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1575                 ret = -EFAULT;
1576
1577         kfree(data);
1578         return ret;
1579 }
1580
1581 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1582 {
1583         const struct ethtool_ops *ops = dev->ethtool_ops;
1584
1585         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1586             !ops->get_eeprom_len(dev))
1587                 return -EOPNOTSUPP;
1588
1589         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1590                                       ops->get_eeprom_len(dev));
1591 }
1592
1593 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1594 {
1595         struct ethtool_eeprom eeprom;
1596         const struct ethtool_ops *ops = dev->ethtool_ops;
1597         void __user *userbuf = useraddr + sizeof(eeprom);
1598         u32 bytes_remaining;
1599         u8 *data;
1600         int ret = 0;
1601
1602         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1603             !ops->get_eeprom_len(dev))
1604                 return -EOPNOTSUPP;
1605
1606         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1607                 return -EFAULT;
1608
1609         /* Check for wrap and zero */
1610         if (eeprom.offset + eeprom.len <= eeprom.offset)
1611                 return -EINVAL;
1612
1613         /* Check for exceeding total eeprom len */
1614         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1615                 return -EINVAL;
1616
1617         data = kmalloc(PAGE_SIZE, GFP_USER);
1618         if (!data)
1619                 return -ENOMEM;
1620
1621         bytes_remaining = eeprom.len;
1622         while (bytes_remaining > 0) {
1623                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1624
1625                 if (copy_from_user(data, userbuf, eeprom.len)) {
1626                         ret = -EFAULT;
1627                         break;
1628                 }
1629                 ret = ops->set_eeprom(dev, &eeprom, data);
1630                 if (ret)
1631                         break;
1632                 userbuf += eeprom.len;
1633                 eeprom.offset += eeprom.len;
1634                 bytes_remaining -= eeprom.len;
1635         }
1636
1637         kfree(data);
1638         return ret;
1639 }
1640
1641 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1642                                                    void __user *useraddr)
1643 {
1644         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1645
1646         if (!dev->ethtool_ops->get_coalesce)
1647                 return -EOPNOTSUPP;
1648
1649         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1650
1651         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1652                 return -EFAULT;
1653         return 0;
1654 }
1655
1656 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1657                                                    void __user *useraddr)
1658 {
1659         struct ethtool_coalesce coalesce;
1660
1661         if (!dev->ethtool_ops->set_coalesce)
1662                 return -EOPNOTSUPP;
1663
1664         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1665                 return -EFAULT;
1666
1667         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1668 }
1669
1670 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1671 {
1672         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1673
1674         if (!dev->ethtool_ops->get_ringparam)
1675                 return -EOPNOTSUPP;
1676
1677         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1678
1679         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1680                 return -EFAULT;
1681         return 0;
1682 }
1683
1684 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1685 {
1686         struct ethtool_ringparam ringparam;
1687
1688         if (!dev->ethtool_ops->set_ringparam)
1689                 return -EOPNOTSUPP;
1690
1691         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1692                 return -EFAULT;
1693
1694         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1695 }
1696
1697 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1698                                                    void __user *useraddr)
1699 {
1700         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1701
1702         if (!dev->ethtool_ops->get_channels)
1703                 return -EOPNOTSUPP;
1704
1705         dev->ethtool_ops->get_channels(dev, &channels);
1706
1707         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1708                 return -EFAULT;
1709         return 0;
1710 }
1711
1712 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1713                                                    void __user *useraddr)
1714 {
1715         struct ethtool_channels channels, max;
1716         u32 max_rx_in_use = 0;
1717
1718         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1719                 return -EOPNOTSUPP;
1720
1721         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1722                 return -EFAULT;
1723
1724         dev->ethtool_ops->get_channels(dev, &max);
1725
1726         /* ensure new counts are within the maximums */
1727         if ((channels.rx_count > max.max_rx) ||
1728             (channels.tx_count > max.max_tx) ||
1729             (channels.combined_count > max.max_combined) ||
1730             (channels.other_count > max.max_other))
1731                 return -EINVAL;
1732
1733         /* ensure the new Rx count fits within the configured Rx flow
1734          * indirection table settings */
1735         if (netif_is_rxfh_configured(dev) &&
1736             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1737             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1738             return -EINVAL;
1739
1740         return dev->ethtool_ops->set_channels(dev, &channels);
1741 }
1742
1743 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1744 {
1745         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1746
1747         if (!dev->ethtool_ops->get_pauseparam)
1748                 return -EOPNOTSUPP;
1749
1750         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1751
1752         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1753                 return -EFAULT;
1754         return 0;
1755 }
1756
1757 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1758 {
1759         struct ethtool_pauseparam pauseparam;
1760
1761         if (!dev->ethtool_ops->set_pauseparam)
1762                 return -EOPNOTSUPP;
1763
1764         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1765                 return -EFAULT;
1766
1767         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1768 }
1769
1770 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1771 {
1772         struct ethtool_test test;
1773         const struct ethtool_ops *ops = dev->ethtool_ops;
1774         u64 *data;
1775         int ret, test_len;
1776
1777         if (!ops->self_test || !ops->get_sset_count)
1778                 return -EOPNOTSUPP;
1779
1780         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1781         if (test_len < 0)
1782                 return test_len;
1783         WARN_ON(test_len == 0);
1784
1785         if (copy_from_user(&test, useraddr, sizeof(test)))
1786                 return -EFAULT;
1787
1788         test.len = test_len;
1789         data = kmalloc(test_len * sizeof(u64), GFP_USER);
1790         if (!data)
1791                 return -ENOMEM;
1792
1793         ops->self_test(dev, &test, data);
1794
1795         ret = -EFAULT;
1796         if (copy_to_user(useraddr, &test, sizeof(test)))
1797                 goto out;
1798         useraddr += sizeof(test);
1799         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1800                 goto out;
1801         ret = 0;
1802
1803  out:
1804         kfree(data);
1805         return ret;
1806 }
1807
1808 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1809 {
1810         struct ethtool_gstrings gstrings;
1811         u8 *data;
1812         int ret;
1813
1814         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1815                 return -EFAULT;
1816
1817         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1818         if (ret < 0)
1819                 return ret;
1820
1821         gstrings.len = ret;
1822
1823         data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1824         if (!data)
1825                 return -ENOMEM;
1826
1827         __ethtool_get_strings(dev, gstrings.string_set, data);
1828
1829         ret = -EFAULT;
1830         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1831                 goto out;
1832         useraddr += sizeof(gstrings);
1833         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1834                 goto out;
1835         ret = 0;
1836
1837 out:
1838         kfree(data);
1839         return ret;
1840 }
1841
1842 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1843 {
1844         struct ethtool_value id;
1845         static bool busy;
1846         const struct ethtool_ops *ops = dev->ethtool_ops;
1847         int rc;
1848
1849         if (!ops->set_phys_id)
1850                 return -EOPNOTSUPP;
1851
1852         if (busy)
1853                 return -EBUSY;
1854
1855         if (copy_from_user(&id, useraddr, sizeof(id)))
1856                 return -EFAULT;
1857
1858         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1859         if (rc < 0)
1860                 return rc;
1861
1862         /* Drop the RTNL lock while waiting, but prevent reentry or
1863          * removal of the device.
1864          */
1865         busy = true;
1866         dev_hold(dev);
1867         rtnl_unlock();
1868
1869         if (rc == 0) {
1870                 /* Driver will handle this itself */
1871                 schedule_timeout_interruptible(
1872                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1873         } else {
1874                 /* Driver expects to be called at twice the frequency in rc */
1875                 int n = rc * 2, i, interval = HZ / n;
1876
1877                 /* Count down seconds */
1878                 do {
1879                         /* Count down iterations per second */
1880                         i = n;
1881                         do {
1882                                 rtnl_lock();
1883                                 rc = ops->set_phys_id(dev,
1884                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1885                                 rtnl_unlock();
1886                                 if (rc)
1887                                         break;
1888                                 schedule_timeout_interruptible(interval);
1889                         } while (!signal_pending(current) && --i != 0);
1890                 } while (!signal_pending(current) &&
1891                          (id.data == 0 || --id.data != 0));
1892         }
1893
1894         rtnl_lock();
1895         dev_put(dev);
1896         busy = false;
1897
1898         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1899         return rc;
1900 }
1901
1902 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1903 {
1904         struct ethtool_stats stats;
1905         const struct ethtool_ops *ops = dev->ethtool_ops;
1906         u64 *data;
1907         int ret, n_stats;
1908
1909         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1910                 return -EOPNOTSUPP;
1911
1912         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1913         if (n_stats < 0)
1914                 return n_stats;
1915         WARN_ON(n_stats == 0);
1916
1917         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1918                 return -EFAULT;
1919
1920         stats.n_stats = n_stats;
1921         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1922         if (!data)
1923                 return -ENOMEM;
1924
1925         ops->get_ethtool_stats(dev, &stats, data);
1926
1927         ret = -EFAULT;
1928         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1929                 goto out;
1930         useraddr += sizeof(stats);
1931         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1932                 goto out;
1933         ret = 0;
1934
1935  out:
1936         kfree(data);
1937         return ret;
1938 }
1939
1940 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1941 {
1942         struct ethtool_stats stats;
1943         struct phy_device *phydev = dev->phydev;
1944         u64 *data;
1945         int ret, n_stats;
1946
1947         if (!phydev)
1948                 return -EOPNOTSUPP;
1949
1950         n_stats = phy_get_sset_count(phydev);
1951
1952         if (n_stats < 0)
1953                 return n_stats;
1954         WARN_ON(n_stats == 0);
1955
1956         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1957                 return -EFAULT;
1958
1959         stats.n_stats = n_stats;
1960         data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1961         if (!data)
1962                 return -ENOMEM;
1963
1964         mutex_lock(&phydev->lock);
1965         phydev->drv->get_stats(phydev, &stats, data);
1966         mutex_unlock(&phydev->lock);
1967
1968         ret = -EFAULT;
1969         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1970                 goto out;
1971         useraddr += sizeof(stats);
1972         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1973                 goto out;
1974         ret = 0;
1975
1976  out:
1977         kfree(data);
1978         return ret;
1979 }
1980
1981 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1982 {
1983         struct ethtool_perm_addr epaddr;
1984
1985         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1986                 return -EFAULT;
1987
1988         if (epaddr.size < dev->addr_len)
1989                 return -ETOOSMALL;
1990         epaddr.size = dev->addr_len;
1991
1992         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1993                 return -EFAULT;
1994         useraddr += sizeof(epaddr);
1995         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1996                 return -EFAULT;
1997         return 0;
1998 }
1999
2000 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2001                              u32 cmd, u32 (*actor)(struct net_device *))
2002 {
2003         struct ethtool_value edata = { .cmd = cmd };
2004
2005         if (!actor)
2006                 return -EOPNOTSUPP;
2007
2008         edata.data = actor(dev);
2009
2010         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2011                 return -EFAULT;
2012         return 0;
2013 }
2014
2015 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2016                              void (*actor)(struct net_device *, u32))
2017 {
2018         struct ethtool_value edata;
2019
2020         if (!actor)
2021                 return -EOPNOTSUPP;
2022
2023         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2024                 return -EFAULT;
2025
2026         actor(dev, edata.data);
2027         return 0;
2028 }
2029
2030 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2031                              int (*actor)(struct net_device *, u32))
2032 {
2033         struct ethtool_value edata;
2034
2035         if (!actor)
2036                 return -EOPNOTSUPP;
2037
2038         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2039                 return -EFAULT;
2040
2041         return actor(dev, edata.data);
2042 }
2043
2044 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2045                                                    char __user *useraddr)
2046 {
2047         struct ethtool_flash efl;
2048
2049         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2050                 return -EFAULT;
2051
2052         if (!dev->ethtool_ops->flash_device)
2053                 return -EOPNOTSUPP;
2054
2055         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2056
2057         return dev->ethtool_ops->flash_device(dev, &efl);
2058 }
2059
2060 static int ethtool_set_dump(struct net_device *dev,
2061                         void __user *useraddr)
2062 {
2063         struct ethtool_dump dump;
2064
2065         if (!dev->ethtool_ops->set_dump)
2066                 return -EOPNOTSUPP;
2067
2068         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2069                 return -EFAULT;
2070
2071         return dev->ethtool_ops->set_dump(dev, &dump);
2072 }
2073
2074 static int ethtool_get_dump_flag(struct net_device *dev,
2075                                 void __user *useraddr)
2076 {
2077         int ret;
2078         struct ethtool_dump dump;
2079         const struct ethtool_ops *ops = dev->ethtool_ops;
2080
2081         if (!ops->get_dump_flag)
2082                 return -EOPNOTSUPP;
2083
2084         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2085                 return -EFAULT;
2086
2087         ret = ops->get_dump_flag(dev, &dump);
2088         if (ret)
2089                 return ret;
2090
2091         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2092                 return -EFAULT;
2093         return 0;
2094 }
2095
2096 static int ethtool_get_dump_data(struct net_device *dev,
2097                                 void __user *useraddr)
2098 {
2099         int ret;
2100         __u32 len;
2101         struct ethtool_dump dump, tmp;
2102         const struct ethtool_ops *ops = dev->ethtool_ops;
2103         void *data = NULL;
2104
2105         if (!ops->get_dump_data || !ops->get_dump_flag)
2106                 return -EOPNOTSUPP;
2107
2108         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2109                 return -EFAULT;
2110
2111         memset(&tmp, 0, sizeof(tmp));
2112         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2113         ret = ops->get_dump_flag(dev, &tmp);
2114         if (ret)
2115                 return ret;
2116
2117         len = min(tmp.len, dump.len);
2118         if (!len)
2119                 return -EFAULT;
2120
2121         /* Don't ever let the driver think there's more space available
2122          * than it requested with .get_dump_flag().
2123          */
2124         dump.len = len;
2125
2126         /* Always allocate enough space to hold the whole thing so that the
2127          * driver does not need to check the length and bother with partial
2128          * dumping.
2129          */
2130         data = vzalloc(tmp.len);
2131         if (!data)
2132                 return -ENOMEM;
2133         ret = ops->get_dump_data(dev, &dump, data);
2134         if (ret)
2135                 goto out;
2136
2137         /* There are two sane possibilities:
2138          * 1. The driver's .get_dump_data() does not touch dump.len.
2139          * 2. Or it may set dump.len to how much it really writes, which
2140          *    should be tmp.len (or len if it can do a partial dump).
2141          * In any case respond to userspace with the actual length of data
2142          * it's receiving.
2143          */
2144         WARN_ON(dump.len != len && dump.len != tmp.len);
2145         dump.len = len;
2146
2147         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2148                 ret = -EFAULT;
2149                 goto out;
2150         }
2151         useraddr += offsetof(struct ethtool_dump, data);
2152         if (copy_to_user(useraddr, data, len))
2153                 ret = -EFAULT;
2154 out:
2155         vfree(data);
2156         return ret;
2157 }
2158
2159 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2160 {
2161         int err = 0;
2162         struct ethtool_ts_info info;
2163         const struct ethtool_ops *ops = dev->ethtool_ops;
2164         struct phy_device *phydev = dev->phydev;
2165
2166         memset(&info, 0, sizeof(info));
2167         info.cmd = ETHTOOL_GET_TS_INFO;
2168
2169         if (phydev && phydev->drv && phydev->drv->ts_info) {
2170                 err = phydev->drv->ts_info(phydev, &info);
2171         } else if (ops->get_ts_info) {
2172                 err = ops->get_ts_info(dev, &info);
2173         } else {
2174                 info.so_timestamping =
2175                         SOF_TIMESTAMPING_RX_SOFTWARE |
2176                         SOF_TIMESTAMPING_SOFTWARE;
2177                 info.phc_index = -1;
2178         }
2179
2180         if (err)
2181                 return err;
2182
2183         if (copy_to_user(useraddr, &info, sizeof(info)))
2184                 err = -EFAULT;
2185
2186         return err;
2187 }
2188
2189 static int __ethtool_get_module_info(struct net_device *dev,
2190                                      struct ethtool_modinfo *modinfo)
2191 {
2192         const struct ethtool_ops *ops = dev->ethtool_ops;
2193         struct phy_device *phydev = dev->phydev;
2194
2195         if (phydev && phydev->drv && phydev->drv->module_info)
2196                 return phydev->drv->module_info(phydev, modinfo);
2197
2198         if (ops->get_module_info)
2199                 return ops->get_module_info(dev, modinfo);
2200
2201         return -EOPNOTSUPP;
2202 }
2203
2204 static int ethtool_get_module_info(struct net_device *dev,
2205                                    void __user *useraddr)
2206 {
2207         int ret;
2208         struct ethtool_modinfo modinfo;
2209
2210         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2211                 return -EFAULT;
2212
2213         ret = __ethtool_get_module_info(dev, &modinfo);
2214         if (ret)
2215                 return ret;
2216
2217         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2218                 return -EFAULT;
2219
2220         return 0;
2221 }
2222
2223 static int __ethtool_get_module_eeprom(struct net_device *dev,
2224                                        struct ethtool_eeprom *ee, u8 *data)
2225 {
2226         const struct ethtool_ops *ops = dev->ethtool_ops;
2227         struct phy_device *phydev = dev->phydev;
2228
2229         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2230                 return phydev->drv->module_eeprom(phydev, ee, data);
2231
2232         if (ops->get_module_eeprom)
2233                 return ops->get_module_eeprom(dev, ee, data);
2234
2235         return -EOPNOTSUPP;
2236 }
2237
2238 static int ethtool_get_module_eeprom(struct net_device *dev,
2239                                      void __user *useraddr)
2240 {
2241         int ret;
2242         struct ethtool_modinfo modinfo;
2243
2244         ret = __ethtool_get_module_info(dev, &modinfo);
2245         if (ret)
2246                 return ret;
2247
2248         return ethtool_get_any_eeprom(dev, useraddr,
2249                                       __ethtool_get_module_eeprom,
2250                                       modinfo.eeprom_len);
2251 }
2252
2253 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2254 {
2255         switch (tuna->id) {
2256         case ETHTOOL_RX_COPYBREAK:
2257         case ETHTOOL_TX_COPYBREAK:
2258                 if (tuna->len != sizeof(u32) ||
2259                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2260                         return -EINVAL;
2261                 break;
2262         default:
2263                 return -EINVAL;
2264         }
2265
2266         return 0;
2267 }
2268
2269 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2270 {
2271         int ret;
2272         struct ethtool_tunable tuna;
2273         const struct ethtool_ops *ops = dev->ethtool_ops;
2274         void *data;
2275
2276         if (!ops->get_tunable)
2277                 return -EOPNOTSUPP;
2278         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2279                 return -EFAULT;
2280         ret = ethtool_tunable_valid(&tuna);
2281         if (ret)
2282                 return ret;
2283         data = kmalloc(tuna.len, GFP_USER);
2284         if (!data)
2285                 return -ENOMEM;
2286         ret = ops->get_tunable(dev, &tuna, data);
2287         if (ret)
2288                 goto out;
2289         useraddr += sizeof(tuna);
2290         ret = -EFAULT;
2291         if (copy_to_user(useraddr, data, tuna.len))
2292                 goto out;
2293         ret = 0;
2294
2295 out:
2296         kfree(data);
2297         return ret;
2298 }
2299
2300 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2301 {
2302         int ret;
2303         struct ethtool_tunable tuna;
2304         const struct ethtool_ops *ops = dev->ethtool_ops;
2305         void *data;
2306
2307         if (!ops->set_tunable)
2308                 return -EOPNOTSUPP;
2309         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2310                 return -EFAULT;
2311         ret = ethtool_tunable_valid(&tuna);
2312         if (ret)
2313                 return ret;
2314         data = kmalloc(tuna.len, GFP_USER);
2315         if (!data)
2316                 return -ENOMEM;
2317         useraddr += sizeof(tuna);
2318         ret = -EFAULT;
2319         if (copy_from_user(data, useraddr, tuna.len))
2320                 goto out;
2321         ret = ops->set_tunable(dev, &tuna, data);
2322
2323 out:
2324         kfree(data);
2325         return ret;
2326 }
2327
2328 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2329                                           void __user *useraddr,
2330                                           struct ethtool_per_queue_op *per_queue_opt)
2331 {
2332         u32 bit;
2333         int ret;
2334         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2335
2336         if (!dev->ethtool_ops->get_per_queue_coalesce)
2337                 return -EOPNOTSUPP;
2338
2339         useraddr += sizeof(*per_queue_opt);
2340
2341         bitmap_from_u32array(queue_mask,
2342                              MAX_NUM_QUEUE,
2343                              per_queue_opt->queue_mask,
2344                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2345
2346         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2347                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2348
2349                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2350                 if (ret != 0)
2351                         return ret;
2352                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2353                         return -EFAULT;
2354                 useraddr += sizeof(coalesce);
2355         }
2356
2357         return 0;
2358 }
2359
2360 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2361                                           void __user *useraddr,
2362                                           struct ethtool_per_queue_op *per_queue_opt)
2363 {
2364         u32 bit;
2365         int i, ret = 0;
2366         int n_queue;
2367         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2368         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2369
2370         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2371             (!dev->ethtool_ops->get_per_queue_coalesce))
2372                 return -EOPNOTSUPP;
2373
2374         useraddr += sizeof(*per_queue_opt);
2375
2376         bitmap_from_u32array(queue_mask,
2377                              MAX_NUM_QUEUE,
2378                              per_queue_opt->queue_mask,
2379                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2380         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2381         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2382         if (!backup)
2383                 return -ENOMEM;
2384
2385         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2386                 struct ethtool_coalesce coalesce;
2387
2388                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2389                 if (ret != 0)
2390                         goto roll_back;
2391
2392                 tmp++;
2393
2394                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2395                         ret = -EFAULT;
2396                         goto roll_back;
2397                 }
2398
2399                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2400                 if (ret != 0)
2401                         goto roll_back;
2402
2403                 useraddr += sizeof(coalesce);
2404         }
2405
2406 roll_back:
2407         if (ret != 0) {
2408                 tmp = backup;
2409                 for_each_set_bit(i, queue_mask, bit) {
2410                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2411                         tmp++;
2412                 }
2413         }
2414         kfree(backup);
2415
2416         return ret;
2417 }
2418
2419 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2420 {
2421         struct ethtool_per_queue_op per_queue_opt;
2422
2423         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2424                 return -EFAULT;
2425
2426         switch (per_queue_opt.sub_command) {
2427         case ETHTOOL_GCOALESCE:
2428                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2429         case ETHTOOL_SCOALESCE:
2430                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2431         default:
2432                 return -EOPNOTSUPP;
2433         };
2434 }
2435
2436 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2437 {
2438         switch (tuna->id) {
2439         case ETHTOOL_PHY_DOWNSHIFT:
2440                 if (tuna->len != sizeof(u8) ||
2441                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2442                         return -EINVAL;
2443                 break;
2444         default:
2445                 return -EINVAL;
2446         }
2447
2448         return 0;
2449 }
2450
2451 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2452 {
2453         int ret;
2454         struct ethtool_tunable tuna;
2455         struct phy_device *phydev = dev->phydev;
2456         void *data;
2457
2458         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2459                 return -EOPNOTSUPP;
2460
2461         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2462                 return -EFAULT;
2463         ret = ethtool_phy_tunable_valid(&tuna);
2464         if (ret)
2465                 return ret;
2466         data = kmalloc(tuna.len, GFP_USER);
2467         if (!data)
2468                 return -ENOMEM;
2469         mutex_lock(&phydev->lock);
2470         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2471         mutex_unlock(&phydev->lock);
2472         if (ret)
2473                 goto out;
2474         useraddr += sizeof(tuna);
2475         ret = -EFAULT;
2476         if (copy_to_user(useraddr, data, tuna.len))
2477                 goto out;
2478         ret = 0;
2479
2480 out:
2481         kfree(data);
2482         return ret;
2483 }
2484
2485 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2486 {
2487         int ret;
2488         struct ethtool_tunable tuna;
2489         struct phy_device *phydev = dev->phydev;
2490         void *data;
2491
2492         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2493                 return -EOPNOTSUPP;
2494         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2495                 return -EFAULT;
2496         ret = ethtool_phy_tunable_valid(&tuna);
2497         if (ret)
2498                 return ret;
2499         data = kmalloc(tuna.len, GFP_USER);
2500         if (!data)
2501                 return -ENOMEM;
2502         useraddr += sizeof(tuna);
2503         ret = -EFAULT;
2504         if (copy_from_user(data, useraddr, tuna.len))
2505                 goto out;
2506         mutex_lock(&phydev->lock);
2507         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2508         mutex_unlock(&phydev->lock);
2509
2510 out:
2511         kfree(data);
2512         return ret;
2513 }
2514
2515 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2516
2517 int dev_ethtool(struct net *net, struct ifreq *ifr)
2518 {
2519         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2520         void __user *useraddr = ifr->ifr_data;
2521         u32 ethcmd, sub_cmd;
2522         int rc;
2523         netdev_features_t old_features;
2524
2525         if (!dev || !netif_device_present(dev))
2526                 return -ENODEV;
2527
2528         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2529                 return -EFAULT;
2530
2531         if (ethcmd == ETHTOOL_PERQUEUE) {
2532                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2533                         return -EFAULT;
2534         } else {
2535                 sub_cmd = ethcmd;
2536         }
2537         /* Allow some commands to be done by anyone */
2538         switch (sub_cmd) {
2539         case ETHTOOL_GSET:
2540         case ETHTOOL_GDRVINFO:
2541         case ETHTOOL_GMSGLVL:
2542         case ETHTOOL_GLINK:
2543         case ETHTOOL_GCOALESCE:
2544         case ETHTOOL_GRINGPARAM:
2545         case ETHTOOL_GPAUSEPARAM:
2546         case ETHTOOL_GRXCSUM:
2547         case ETHTOOL_GTXCSUM:
2548         case ETHTOOL_GSG:
2549         case ETHTOOL_GSSET_INFO:
2550         case ETHTOOL_GSTRINGS:
2551         case ETHTOOL_GSTATS:
2552         case ETHTOOL_GPHYSTATS:
2553         case ETHTOOL_GTSO:
2554         case ETHTOOL_GPERMADDR:
2555         case ETHTOOL_GUFO:
2556         case ETHTOOL_GGSO:
2557         case ETHTOOL_GGRO:
2558         case ETHTOOL_GFLAGS:
2559         case ETHTOOL_GPFLAGS:
2560         case ETHTOOL_GRXFH:
2561         case ETHTOOL_GRXRINGS:
2562         case ETHTOOL_GRXCLSRLCNT:
2563         case ETHTOOL_GRXCLSRULE:
2564         case ETHTOOL_GRXCLSRLALL:
2565         case ETHTOOL_GRXFHINDIR:
2566         case ETHTOOL_GRSSH:
2567         case ETHTOOL_GFEATURES:
2568         case ETHTOOL_GCHANNELS:
2569         case ETHTOOL_GET_TS_INFO:
2570         case ETHTOOL_GEEE:
2571         case ETHTOOL_GTUNABLE:
2572         case ETHTOOL_PHY_GTUNABLE:
2573         case ETHTOOL_GLINKSETTINGS:
2574                 break;
2575         default:
2576                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2577                         return -EPERM;
2578         }
2579
2580         if (dev->ethtool_ops->begin) {
2581                 rc = dev->ethtool_ops->begin(dev);
2582                 if (rc  < 0)
2583                         return rc;
2584         }
2585         old_features = dev->features;
2586
2587         switch (ethcmd) {
2588         case ETHTOOL_GSET:
2589                 rc = ethtool_get_settings(dev, useraddr);
2590                 break;
2591         case ETHTOOL_SSET:
2592                 rc = ethtool_set_settings(dev, useraddr);
2593                 break;
2594         case ETHTOOL_GDRVINFO:
2595                 rc = ethtool_get_drvinfo(dev, useraddr);
2596                 break;
2597         case ETHTOOL_GREGS:
2598                 rc = ethtool_get_regs(dev, useraddr);
2599                 break;
2600         case ETHTOOL_GWOL:
2601                 rc = ethtool_get_wol(dev, useraddr);
2602                 break;
2603         case ETHTOOL_SWOL:
2604                 rc = ethtool_set_wol(dev, useraddr);
2605                 break;
2606         case ETHTOOL_GMSGLVL:
2607                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2608                                        dev->ethtool_ops->get_msglevel);
2609                 break;
2610         case ETHTOOL_SMSGLVL:
2611                 rc = ethtool_set_value_void(dev, useraddr,
2612                                        dev->ethtool_ops->set_msglevel);
2613                 break;
2614         case ETHTOOL_GEEE:
2615                 rc = ethtool_get_eee(dev, useraddr);
2616                 break;
2617         case ETHTOOL_SEEE:
2618                 rc = ethtool_set_eee(dev, useraddr);
2619                 break;
2620         case ETHTOOL_NWAY_RST:
2621                 rc = ethtool_nway_reset(dev);
2622                 break;
2623         case ETHTOOL_GLINK:
2624                 rc = ethtool_get_link(dev, useraddr);
2625                 break;
2626         case ETHTOOL_GEEPROM:
2627                 rc = ethtool_get_eeprom(dev, useraddr);
2628                 break;
2629         case ETHTOOL_SEEPROM:
2630                 rc = ethtool_set_eeprom(dev, useraddr);
2631                 break;
2632         case ETHTOOL_GCOALESCE:
2633                 rc = ethtool_get_coalesce(dev, useraddr);
2634                 break;
2635         case ETHTOOL_SCOALESCE:
2636                 rc = ethtool_set_coalesce(dev, useraddr);
2637                 break;
2638         case ETHTOOL_GRINGPARAM:
2639                 rc = ethtool_get_ringparam(dev, useraddr);
2640                 break;
2641         case ETHTOOL_SRINGPARAM:
2642                 rc = ethtool_set_ringparam(dev, useraddr);
2643                 break;
2644         case ETHTOOL_GPAUSEPARAM:
2645                 rc = ethtool_get_pauseparam(dev, useraddr);
2646                 break;
2647         case ETHTOOL_SPAUSEPARAM:
2648                 rc = ethtool_set_pauseparam(dev, useraddr);
2649                 break;
2650         case ETHTOOL_TEST:
2651                 rc = ethtool_self_test(dev, useraddr);
2652                 break;
2653         case ETHTOOL_GSTRINGS:
2654                 rc = ethtool_get_strings(dev, useraddr);
2655                 break;
2656         case ETHTOOL_PHYS_ID:
2657                 rc = ethtool_phys_id(dev, useraddr);
2658                 break;
2659         case ETHTOOL_GSTATS:
2660                 rc = ethtool_get_stats(dev, useraddr);
2661                 break;
2662         case ETHTOOL_GPERMADDR:
2663                 rc = ethtool_get_perm_addr(dev, useraddr);
2664                 break;
2665         case ETHTOOL_GFLAGS:
2666                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2667                                         __ethtool_get_flags);
2668                 break;
2669         case ETHTOOL_SFLAGS:
2670                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2671                 break;
2672         case ETHTOOL_GPFLAGS:
2673                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2674                                        dev->ethtool_ops->get_priv_flags);
2675                 break;
2676         case ETHTOOL_SPFLAGS:
2677                 rc = ethtool_set_value(dev, useraddr,
2678                                        dev->ethtool_ops->set_priv_flags);
2679                 break;
2680         case ETHTOOL_GRXFH:
2681         case ETHTOOL_GRXRINGS:
2682         case ETHTOOL_GRXCLSRLCNT:
2683         case ETHTOOL_GRXCLSRULE:
2684         case ETHTOOL_GRXCLSRLALL:
2685                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2686                 break;
2687         case ETHTOOL_SRXFH:
2688         case ETHTOOL_SRXCLSRLDEL:
2689         case ETHTOOL_SRXCLSRLINS:
2690                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2691                 break;
2692         case ETHTOOL_FLASHDEV:
2693                 rc = ethtool_flash_device(dev, useraddr);
2694                 break;
2695         case ETHTOOL_RESET:
2696                 rc = ethtool_reset(dev, useraddr);
2697                 break;
2698         case ETHTOOL_GSSET_INFO:
2699                 rc = ethtool_get_sset_info(dev, useraddr);
2700                 break;
2701         case ETHTOOL_GRXFHINDIR:
2702                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2703                 break;
2704         case ETHTOOL_SRXFHINDIR:
2705                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2706                 break;
2707         case ETHTOOL_GRSSH:
2708                 rc = ethtool_get_rxfh(dev, useraddr);
2709                 break;
2710         case ETHTOOL_SRSSH:
2711                 rc = ethtool_set_rxfh(dev, useraddr);
2712                 break;
2713         case ETHTOOL_GFEATURES:
2714                 rc = ethtool_get_features(dev, useraddr);
2715                 break;
2716         case ETHTOOL_SFEATURES:
2717                 rc = ethtool_set_features(dev, useraddr);
2718                 break;
2719         case ETHTOOL_GTXCSUM:
2720         case ETHTOOL_GRXCSUM:
2721         case ETHTOOL_GSG:
2722         case ETHTOOL_GTSO:
2723         case ETHTOOL_GUFO:
2724         case ETHTOOL_GGSO:
2725         case ETHTOOL_GGRO:
2726                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2727                 break;
2728         case ETHTOOL_STXCSUM:
2729         case ETHTOOL_SRXCSUM:
2730         case ETHTOOL_SSG:
2731         case ETHTOOL_STSO:
2732         case ETHTOOL_SUFO:
2733         case ETHTOOL_SGSO:
2734         case ETHTOOL_SGRO:
2735                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2736                 break;
2737         case ETHTOOL_GCHANNELS:
2738                 rc = ethtool_get_channels(dev, useraddr);
2739                 break;
2740         case ETHTOOL_SCHANNELS:
2741                 rc = ethtool_set_channels(dev, useraddr);
2742                 break;
2743         case ETHTOOL_SET_DUMP:
2744                 rc = ethtool_set_dump(dev, useraddr);
2745                 break;
2746         case ETHTOOL_GET_DUMP_FLAG:
2747                 rc = ethtool_get_dump_flag(dev, useraddr);
2748                 break;
2749         case ETHTOOL_GET_DUMP_DATA:
2750                 rc = ethtool_get_dump_data(dev, useraddr);
2751                 break;
2752         case ETHTOOL_GET_TS_INFO:
2753                 rc = ethtool_get_ts_info(dev, useraddr);
2754                 break;
2755         case ETHTOOL_GMODULEINFO:
2756                 rc = ethtool_get_module_info(dev, useraddr);
2757                 break;
2758         case ETHTOOL_GMODULEEEPROM:
2759                 rc = ethtool_get_module_eeprom(dev, useraddr);
2760                 break;
2761         case ETHTOOL_GTUNABLE:
2762                 rc = ethtool_get_tunable(dev, useraddr);
2763                 break;
2764         case ETHTOOL_STUNABLE:
2765                 rc = ethtool_set_tunable(dev, useraddr);
2766                 break;
2767         case ETHTOOL_GPHYSTATS:
2768                 rc = ethtool_get_phy_stats(dev, useraddr);
2769                 break;
2770         case ETHTOOL_PERQUEUE:
2771                 rc = ethtool_set_per_queue(dev, useraddr);
2772                 break;
2773         case ETHTOOL_GLINKSETTINGS:
2774                 rc = ethtool_get_link_ksettings(dev, useraddr);
2775                 break;
2776         case ETHTOOL_SLINKSETTINGS:
2777                 rc = ethtool_set_link_ksettings(dev, useraddr);
2778                 break;
2779         case ETHTOOL_PHY_GTUNABLE:
2780                 rc = get_phy_tunable(dev, useraddr);
2781                 break;
2782         case ETHTOOL_PHY_STUNABLE:
2783                 rc = set_phy_tunable(dev, useraddr);
2784                 break;
2785         default:
2786                 rc = -EOPNOTSUPP;
2787         }
2788
2789         if (dev->ethtool_ops->complete)
2790                 dev->ethtool_ops->complete(dev);
2791
2792         if (old_features != dev->features)
2793                 netdev_features_change(dev);
2794
2795         return rc;
2796 }