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