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_IPIP_BIT] =         "tx-ipip-segmentation",
  88         [NETIF_F_GSO_SIT_BIT] =          "tx-sit-segmentation",
  89         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
  90         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
  91         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
  92
  93         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
  94         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
  95         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
  96         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
  97         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
  98         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
  99         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
 100         [NETIF_F_LOOPBACK_BIT] =         "loopback",
 101         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
 102         [NETIF_F_RXALL_BIT] =            "rx-all",
 103         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
 104         [NETIF_F_BUSY_POLL_BIT] =        "busy-poll",
 105         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
 106 };
 107
 108 static const char
 109 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
 110         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
 111         [ETH_RSS_HASH_XOR_BIT] =        "xor",
 112 };
 113
 114 static const char
 115 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 116         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 117         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
 118         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
 119 };
 120
 121 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 122 {
 123         struct ethtool_gfeatures cmd = {
 124                 .cmd = ETHTOOL_GFEATURES,
 125                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 126         };
 127         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 128         u32 __user *sizeaddr;
 129         u32 copy_size;
 130         int i;
 131
 132         /* in case feature bits run out again */
 133         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
 134
 135         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 136                 features[i].available = (u32)(dev->hw_features >> (32 * i));
 137                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 138                 features[i].active = (u32)(dev->features >> (32 * i));
 139                 features[i].never_changed =
 140                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 141         }
 142
 143         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 144         if (get_user(copy_size, sizeaddr))
 145                 return -EFAULT;
 146
 147         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 148                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 149
 150         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 151                 return -EFAULT;
 152         useraddr += sizeof(cmd);
 153         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 154                 return -EFAULT;
 155
 156         return 0;
 157 }
 158
 159 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 160 {
 161         struct ethtool_sfeatures cmd;
 162         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 163         netdev_features_t wanted = 0, valid = 0;
 164         int i, ret = 0;
 165
 166         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 167                 return -EFAULT;
 168         useraddr += sizeof(cmd);
 169
 170         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 171                 return -EINVAL;
 172
 173         if (copy_from_user(features, useraddr, sizeof(features)))
 174                 return -EFAULT;
 175
 176         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 177                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 178                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 179         }
 180
 181         if (valid & ~NETIF_F_ETHTOOL_BITS)
 182                 return -EINVAL;
 183
 184         if (valid & ~dev->hw_features) {
 185                 valid &= dev->hw_features;
 186                 ret |= ETHTOOL_F_UNSUPPORTED;
 187         }
 188
 189         dev->wanted_features &= ~valid;
 190         dev->wanted_features |= wanted & valid;
 191         __netdev_update_features(dev);
 192
 193         if ((dev->wanted_features ^ dev->features) & valid)
 194                 ret |= ETHTOOL_F_WISH;
 195
 196         return ret;
 197 }
 198
 199 static int phy_get_sset_count(struct phy_device *phydev)
 200 {
 201         int ret;
 202
 203         if (phydev->drv->get_sset_count &&
 204             phydev->drv->get_strings &&
 205             phydev->drv->get_stats) {
 206                 mutex_lock(&phydev->lock);
 207                 ret = phydev->drv->get_sset_count(phydev);
 208                 mutex_unlock(&phydev->lock);
 209
 210                 return ret;
 211         }
 212
 213         return -EOPNOTSUPP;
 214 }
 215
 216 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 217 {
 218         const struct ethtool_ops *ops = dev->ethtool_ops;
 219
 220         if (sset == ETH_SS_FEATURES)
 221                 return ARRAY_SIZE(netdev_features_strings);
 222
 223         if (sset == ETH_SS_RSS_HASH_FUNCS)
 224                 return ARRAY_SIZE(rss_hash_func_strings);
 225
 226         if (sset == ETH_SS_TUNABLES)
 227                 return ARRAY_SIZE(tunable_strings);
 228
 229         if (sset == ETH_SS_PHY_STATS) {
 230                 if (dev->phydev)
 231                         return phy_get_sset_count(dev->phydev);
 232                 else
 233                         return -EOPNOTSUPP;
 234         }
 235
 236         if (ops->get_sset_count && ops->get_strings)
 237                 return ops->get_sset_count(dev, sset);
 238         else
 239                 return -EOPNOTSUPP;
 240 }
 241
 242 static void __ethtool_get_strings(struct net_device *dev,
 243         u32 stringset, u8 *data)
 244 {
 245         const struct ethtool_ops *ops = dev->ethtool_ops;
 246
 247         if (stringset == ETH_SS_FEATURES)
 248                 memcpy(data, netdev_features_strings,
 249                         sizeof(netdev_features_strings));
 250         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 251                 memcpy(data, rss_hash_func_strings,
 252                        sizeof(rss_hash_func_strings));
 253         else if (stringset == ETH_SS_TUNABLES)
 254                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 255         else if (stringset == ETH_SS_PHY_STATS) {
 256                 struct phy_device *phydev = dev->phydev;
 257
 258                 if (phydev) {
 259                         mutex_lock(&phydev->lock);
 260                         phydev->drv->get_strings(phydev, data);
 261                         mutex_unlock(&phydev->lock);
 262                 } else {
 263                         return;
 264                 }
 265         } else
 266                 /* ops->get_strings is valid because checked earlier */
 267                 ops->get_strings(dev, stringset, data);
 268 }
 269
 270 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 271 {
 272         /* feature masks of legacy discrete ethtool ops */
 273
 274         switch (eth_cmd) {
 275         case ETHTOOL_GTXCSUM:
 276         case ETHTOOL_STXCSUM:
 277                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 278         case ETHTOOL_GRXCSUM:
 279         case ETHTOOL_SRXCSUM:
 280                 return NETIF_F_RXCSUM;
 281         case ETHTOOL_GSG:
 282         case ETHTOOL_SSG:
 283                 return NETIF_F_SG;
 284         case ETHTOOL_GTSO:
 285         case ETHTOOL_STSO:
 286                 return NETIF_F_ALL_TSO;
 287         case ETHTOOL_GUFO:
 288         case ETHTOOL_SUFO:
 289                 return NETIF_F_UFO;
 290         case ETHTOOL_GGSO:
 291         case ETHTOOL_SGSO:
 292                 return NETIF_F_GSO;
 293         case ETHTOOL_GGRO:
 294         case ETHTOOL_SGRO:
 295                 return NETIF_F_GRO;
 296         default:
 297                 BUG();
 298         }
 299 }
 300
 301 static int ethtool_get_one_feature(struct net_device *dev,
 302         char __user *useraddr, u32 ethcmd)
 303 {
 304         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 305         struct ethtool_value edata = {
 306                 .cmd = ethcmd,
 307                 .data = !!(dev->features & mask),
 308         };
 309
 310         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 311                 return -EFAULT;
 312         return 0;
 313 }
 314
 315 static int ethtool_set_one_feature(struct net_device *dev,
 316         void __user *useraddr, u32 ethcmd)
 317 {
 318         struct ethtool_value edata;
 319         netdev_features_t mask;
 320
 321         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 322                 return -EFAULT;
 323
 324         mask = ethtool_get_feature_mask(ethcmd);
 325         mask &= dev->hw_features;
 326         if (!mask)
 327                 return -EOPNOTSUPP;
 328
 329         if (edata.data)
 330                 dev->wanted_features |= mask;
 331         else
 332                 dev->wanted_features &= ~mask;
 333
 334         __netdev_update_features(dev);
 335
 336         return 0;
 337 }
 338
 339 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 340                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 341 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 342                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 343                           NETIF_F_RXHASH)
 344
 345 static u32 __ethtool_get_flags(struct net_device *dev)
 346 {
 347         u32 flags = 0;
 348
 349         if (dev->features & NETIF_F_LRO)
 350                 flags |= ETH_FLAG_LRO;
 351         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 352                 flags |= ETH_FLAG_RXVLAN;
 353         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 354                 flags |= ETH_FLAG_TXVLAN;
 355         if (dev->features & NETIF_F_NTUPLE)
 356                 flags |= ETH_FLAG_NTUPLE;
 357         if (dev->features & NETIF_F_RXHASH)
 358                 flags |= ETH_FLAG_RXHASH;
 359
 360         return flags;
 361 }
 362
 363 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 364 {
 365         netdev_features_t features = 0, changed;
 366
 367         if (data & ~ETH_ALL_FLAGS)
 368                 return -EINVAL;
 369
 370         if (data & ETH_FLAG_LRO)
 371                 features |= NETIF_F_LRO;
 372         if (data & ETH_FLAG_RXVLAN)
 373                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 374         if (data & ETH_FLAG_TXVLAN)
 375                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 376         if (data & ETH_FLAG_NTUPLE)
 377                 features |= NETIF_F_NTUPLE;
 378         if (data & ETH_FLAG_RXHASH)
 379                 features |= NETIF_F_RXHASH;
 380
 381         /* allow changing only bits set in hw_features */
 382         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 383         if (changed & ~dev->hw_features)
 384                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 385
 386         dev->wanted_features =
 387                 (dev->wanted_features & ~changed) | (features & changed);
 388
 389         __netdev_update_features(dev);
 390
 391         return 0;
 392 }
 393
 394 static void convert_legacy_u32_to_link_mode(unsigned long *dst, u32 legacy_u32)
 395 {
 396         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 397         dst[0] = legacy_u32;
 398 }
 399
 400 /* return false if src had higher bits set. lower bits always updated. */
 401 static bool convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 402                                             const unsigned long *src)
 403 {
 404         bool retval = true;
 405
 406         /* TODO: following test will soon always be true */
 407         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 408                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 409
 410                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 411                 bitmap_fill(ext, 32);
 412                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 413                 if (bitmap_intersects(ext, src,
 414                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 415                         /* src mask goes beyond bit 31 */
 416                         retval = false;
 417                 }
 418         }
 419         *legacy_u32 = src[0];
 420         return retval;
 421 }
 422
 423 /* return false if legacy contained non-0 deprecated fields
 424  * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
 425  */
 426 static bool
 427 convert_legacy_settings_to_link_ksettings(
 428         struct ethtool_link_ksettings *link_ksettings,
 429         const struct ethtool_cmd *legacy_settings)
 430 {
 431         bool retval = true;
 432
 433         memset(link_ksettings, 0, sizeof(*link_ksettings));
 434
 435         /* This is used to tell users that driver is still using these
 436          * deprecated legacy fields, and they should not use
 437          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
 438          */
 439         if (legacy_settings->transceiver ||
 440             legacy_settings->maxtxpkt ||
 441             legacy_settings->maxrxpkt)
 442                 retval = false;
 443
 444         convert_legacy_u32_to_link_mode(
 445                 link_ksettings->link_modes.supported,
 446                 legacy_settings->supported);
 447         convert_legacy_u32_to_link_mode(
 448                 link_ksettings->link_modes.advertising,
 449                 legacy_settings->advertising);
 450         convert_legacy_u32_to_link_mode(
 451                 link_ksettings->link_modes.lp_advertising,
 452                 legacy_settings->lp_advertising);
 453         link_ksettings->base.speed
 454                 = ethtool_cmd_speed(legacy_settings);
 455         link_ksettings->base.duplex
 456                 = legacy_settings->duplex;
 457         link_ksettings->base.port
 458                 = legacy_settings->port;
 459         link_ksettings->base.phy_address
 460                 = legacy_settings->phy_address;
 461         link_ksettings->base.autoneg
 462                 = legacy_settings->autoneg;
 463         link_ksettings->base.mdio_support
 464                 = legacy_settings->mdio_support;
 465         link_ksettings->base.eth_tp_mdix
 466                 = legacy_settings->eth_tp_mdix;
 467         link_ksettings->base.eth_tp_mdix_ctrl
 468                 = legacy_settings->eth_tp_mdix_ctrl;
 469         return retval;
 470 }
 471
 472 /* return false if ksettings link modes had higher bits
 473  * set. legacy_settings always updated (best effort)
 474  */
 475 static bool
 476 convert_link_ksettings_to_legacy_settings(
 477         struct ethtool_cmd *legacy_settings,
 478         const struct ethtool_link_ksettings *link_ksettings)
 479 {
 480         bool retval = true;
 481
 482         memset(legacy_settings, 0, sizeof(*legacy_settings));
 483         /* this also clears the deprecated fields in legacy structure:
 484          * __u8         transceiver;
 485          * __u32        maxtxpkt;
 486          * __u32        maxrxpkt;
 487          */
 488
 489         retval &= convert_link_mode_to_legacy_u32(
 490                 &legacy_settings->supported,
 491                 link_ksettings->link_modes.supported);
 492         retval &= convert_link_mode_to_legacy_u32(
 493                 &legacy_settings->advertising,
 494                 link_ksettings->link_modes.advertising);
 495         retval &= convert_link_mode_to_legacy_u32(
 496                 &legacy_settings->lp_advertising,
 497                 link_ksettings->link_modes.lp_advertising);
 498         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 499         legacy_settings->duplex
 500                 = link_ksettings->base.duplex;
 501         legacy_settings->port
 502                 = link_ksettings->base.port;
 503         legacy_settings->phy_address
 504                 = link_ksettings->base.phy_address;
 505         legacy_settings->autoneg
 506                 = link_ksettings->base.autoneg;
 507         legacy_settings->mdio_support
 508                 = link_ksettings->base.mdio_support;
 509         legacy_settings->eth_tp_mdix
 510                 = link_ksettings->base.eth_tp_mdix;
 511         legacy_settings->eth_tp_mdix_ctrl
 512                 = link_ksettings->base.eth_tp_mdix_ctrl;
 513         return retval;
 514 }
 515
 516 /* number of 32-bit words to store the user's link mode bitmaps */
 517 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 518         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 519
 520 /* layout of the struct passed from/to userland */
 521 struct ethtool_link_usettings {
 522         struct ethtool_link_settings base;
 523         struct {
 524                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 525                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 526                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 527         } link_modes;
 528 };
 529
 530 /* Internal kernel helper to query a device ethtool_link_settings.
 531  *
 532  * Backward compatibility note: for compatibility with legacy drivers
 533  * that implement only the ethtool_cmd API, this has to work with both
 534  * drivers implementing get_link_ksettings API and drivers
 535  * implementing get_settings API. When drivers implement get_settings
 536  * and report ethtool_cmd deprecated fields
 537  * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
 538  * because the resulting struct ethtool_link_settings does not report them.
 539  */
 540 int __ethtool_get_link_ksettings(struct net_device *dev,
 541                                  struct ethtool_link_ksettings *link_ksettings)
 542 {
 543         int err;
 544         struct ethtool_cmd cmd;
 545
 546         ASSERT_RTNL();
 547
 548         if (dev->ethtool_ops->get_link_ksettings) {
 549                 memset(link_ksettings, 0, sizeof(*link_ksettings));
 550                 return dev->ethtool_ops->get_link_ksettings(dev,
 551                                                             link_ksettings);
 552         }
 553
 554         /* driver doesn't support %ethtool_link_ksettings API. revert to
 555          * legacy %ethtool_cmd API, unless it's not supported either.
 556          * TODO: remove when ethtool_ops::get_settings disappears internally
 557          */
 558         if (!dev->ethtool_ops->get_settings)
 559                 return -EOPNOTSUPP;
 560
 561         memset(&cmd, 0, sizeof(cmd));
 562         cmd.cmd = ETHTOOL_GSET;
 563         err = dev->ethtool_ops->get_settings(dev, &cmd);
 564         if (err < 0)
 565                 return err;
 566
 567         /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
 568          */
 569         convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
 570         return err;
 571 }
 572 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 573
 574 /* convert ethtool_link_usettings in user space to a kernel internal
 575  * ethtool_link_ksettings. return 0 on success, errno on error.
 576  */
 577 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 578                                          const void __user *from)
 579 {
 580         struct ethtool_link_usettings link_usettings;
 581
 582         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 583                 return -EFAULT;
 584
 585         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 586         bitmap_from_u32array(to->link_modes.supported,
 587                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 588                              link_usettings.link_modes.supported,
 589                              __ETHTOOL_LINK_MODE_MASK_NU32);
 590         bitmap_from_u32array(to->link_modes.advertising,
 591                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 592                              link_usettings.link_modes.advertising,
 593                              __ETHTOOL_LINK_MODE_MASK_NU32);
 594         bitmap_from_u32array(to->link_modes.lp_advertising,
 595                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 596                              link_usettings.link_modes.lp_advertising,
 597                              __ETHTOOL_LINK_MODE_MASK_NU32);
 598
 599         return 0;
 600 }
 601
 602 /* convert a kernel internal ethtool_link_ksettings to
 603  * ethtool_link_usettings in user space. return 0 on success, errno on
 604  * error.
 605  */
 606 static int
 607 store_link_ksettings_for_user(void __user *to,
 608                               const struct ethtool_link_ksettings *from)
 609 {
 610         struct ethtool_link_usettings link_usettings;
 611
 612         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 613         bitmap_to_u32array(link_usettings.link_modes.supported,
 614                            __ETHTOOL_LINK_MODE_MASK_NU32,
 615                            from->link_modes.supported,
 616                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 617         bitmap_to_u32array(link_usettings.link_modes.advertising,
 618                            __ETHTOOL_LINK_MODE_MASK_NU32,
 619                            from->link_modes.advertising,
 620                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 621         bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
 622                            __ETHTOOL_LINK_MODE_MASK_NU32,
 623                            from->link_modes.lp_advertising,
 624                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 625
 626         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 627                 return -EFAULT;
 628
 629         return 0;
 630 }
 631
 632 /* Query device for its ethtool_link_settings.
 633  *
 634  * Backward compatibility note: this function must fail when driver
 635  * does not implement ethtool::get_link_ksettings, even if legacy
 636  * ethtool_ops::get_settings is implemented. This tells new versions
 637  * of ethtool that they should use the legacy API %ETHTOOL_GSET for
 638  * this driver, so that they can correctly access the ethtool_cmd
 639  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 640  * implements ethtool_ops::get_settings anymore.
 641  */
 642 static int ethtool_get_link_ksettings(struct net_device *dev,
 643                                       void __user *useraddr)
 644 {
 645         int err = 0;
 646         struct ethtool_link_ksettings link_ksettings;
 647
 648         ASSERT_RTNL();
 649
 650         if (!dev->ethtool_ops->get_link_ksettings)
 651                 return -EOPNOTSUPP;
 652
 653         /* handle bitmap nbits handshake */
 654         if (copy_from_user(&link_ksettings.base, useraddr,
 655                            sizeof(link_ksettings.base)))
 656                 return -EFAULT;
 657
 658         if (__ETHTOOL_LINK_MODE_MASK_NU32
 659             != link_ksettings.base.link_mode_masks_nwords) {
 660                 /* wrong link mode nbits requested */
 661                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 662                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 663                 /* send back number of words required as negative val */
 664                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 665                                    "need too many bits for link modes!");
 666                 link_ksettings.base.link_mode_masks_nwords
 667                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 668
 669                 /* copy the base fields back to user, not the link
 670                  * mode bitmaps
 671                  */
 672                 if (copy_to_user(useraddr, &link_ksettings.base,
 673                                  sizeof(link_ksettings.base)))
 674                         return -EFAULT;
 675
 676                 return 0;
 677         }
 678
 679         /* handshake successful: user/kernel agree on
 680          * link_mode_masks_nwords
 681          */
 682
 683         memset(&link_ksettings, 0, sizeof(link_ksettings));
 684         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 685         if (err < 0)
 686                 return err;
 687
 688         /* make sure we tell the right values to user */
 689         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 690         link_ksettings.base.link_mode_masks_nwords
 691                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 692
 693         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 694 }
 695
 696 /* Update device ethtool_link_settings.
 697  *
 698  * Backward compatibility note: this function must fail when driver
 699  * does not implement ethtool::set_link_ksettings, even if legacy
 700  * ethtool_ops::set_settings is implemented. This tells new versions
 701  * of ethtool that they should use the legacy API %ETHTOOL_SSET for
 702  * this driver, so that they can correctly update the ethtool_cmd
 703  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 704  * implements ethtool_ops::get_settings anymore.
 705  */
 706 static int ethtool_set_link_ksettings(struct net_device *dev,
 707                                       void __user *useraddr)
 708 {
 709         int err;
 710         struct ethtool_link_ksettings link_ksettings;
 711
 712         ASSERT_RTNL();
 713
 714         if (!dev->ethtool_ops->set_link_ksettings)
 715                 return -EOPNOTSUPP;
 716
 717         /* make sure nbits field has expected value */
 718         if (copy_from_user(&link_ksettings.base, useraddr,
 719                            sizeof(link_ksettings.base)))
 720                 return -EFAULT;
 721
 722         if (__ETHTOOL_LINK_MODE_MASK_NU32
 723             != link_ksettings.base.link_mode_masks_nwords)
 724                 return -EINVAL;
 725
 726         /* copy the whole structure, now that we know it has expected
 727          * format
 728          */
 729         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 730         if (err)
 731                 return err;
 732
 733         /* re-check nwords field, just in case */
 734         if (__ETHTOOL_LINK_MODE_MASK_NU32
 735             != link_ksettings.base.link_mode_masks_nwords)
 736                 return -EINVAL;
 737
 738         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 739 }
 740
 741 static void
 742 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
 743 {
 744         char name[sizeof(current->comm)];
 745
 746         pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
 747                      get_task_comm(name, current), details);
 748 }
 749
 750 /* Query device for its ethtool_cmd settings.
 751  *
 752  * Backward compatibility note: for compatibility with legacy ethtool,
 753  * this has to work with both drivers implementing get_link_ksettings
 754  * API and drivers implementing get_settings API. When drivers
 755  * implement get_link_ksettings and report higher link mode bits, a
 756  * kernel warning is logged once (with name of 1st driver/device) to
 757  * recommend user to upgrade ethtool, but the command is successful
 758  * (only the lower link mode bits reported back to user).
 759  */
 760 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 761 {
 762         struct ethtool_cmd cmd;
 763
 764         ASSERT_RTNL();
 765
 766         if (dev->ethtool_ops->get_link_ksettings) {
 767                 /* First, use link_ksettings API if it is supported */
 768                 int err;
 769                 struct ethtool_link_ksettings link_ksettings;
 770
 771                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 772                 err = dev->ethtool_ops->get_link_ksettings(dev,
 773                                                            &link_ksettings);
 774                 if (err < 0)
 775                         return err;
 776                 if (!convert_link_ksettings_to_legacy_settings(&cmd,
 777                                                                &link_ksettings))
 778                         warn_incomplete_ethtool_legacy_settings_conversion(
 779                                 "link modes are only partially reported");
 780
 781                 /* send a sensible cmd tag back to user */
 782                 cmd.cmd = ETHTOOL_GSET;
 783         } else {
 784                 /* driver doesn't support %ethtool_link_ksettings
 785                  * API. revert to legacy %ethtool_cmd API, unless it's
 786                  * not supported either.
 787                  */
 788                 int err;
 789
 790                 if (!dev->ethtool_ops->get_settings)
 791                         return -EOPNOTSUPP;
 792
 793                 memset(&cmd, 0, sizeof(cmd));
 794                 cmd.cmd = ETHTOOL_GSET;
 795                 err = dev->ethtool_ops->get_settings(dev, &cmd);
 796                 if (err < 0)
 797                         return err;
 798         }
 799
 800         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 801                 return -EFAULT;
 802
 803         return 0;
 804 }
 805
 806 /* Update device link settings with given ethtool_cmd.
 807  *
 808  * Backward compatibility note: for compatibility with legacy ethtool,
 809  * this has to work with both drivers implementing set_link_ksettings
 810  * API and drivers implementing set_settings API. When drivers
 811  * implement set_link_ksettings and user's request updates deprecated
 812  * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 813  * warning is logged once (with name of 1st driver/device) to
 814  * recommend user to upgrade ethtool, and the request is rejected.
 815  */
 816 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 817 {
 818         struct ethtool_cmd cmd;
 819
 820         ASSERT_RTNL();
 821
 822         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 823                 return -EFAULT;
 824
 825         /* first, try new %ethtool_link_ksettings API. */
 826         if (dev->ethtool_ops->set_link_ksettings) {
 827                 struct ethtool_link_ksettings link_ksettings;
 828
 829                 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
 830                                                                &cmd))
 831                         return -EINVAL;
 832
 833                 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
 834                 link_ksettings.base.link_mode_masks_nwords
 835                         = __ETHTOOL_LINK_MODE_MASK_NU32;
 836                 return dev->ethtool_ops->set_link_ksettings(dev,
 837                                                             &link_ksettings);
 838         }
 839
 840         /* legacy %ethtool_cmd API */
 841
 842         /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
 843          * disappears internally
 844          */
 845
 846         if (!dev->ethtool_ops->set_settings)
 847                 return -EOPNOTSUPP;
 848
 849         return dev->ethtool_ops->set_settings(dev, &cmd);
 850 }
 851
 852 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 853                                                   void __user *useraddr)
 854 {
 855         struct ethtool_drvinfo info;
 856         const struct ethtool_ops *ops = dev->ethtool_ops;
 857
 858         memset(&info, 0, sizeof(info));
 859         info.cmd = ETHTOOL_GDRVINFO;
 860         if (ops->get_drvinfo) {
 861                 ops->get_drvinfo(dev, &info);
 862         } else if (dev->dev.parent && dev->dev.parent->driver) {
 863                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 864                         sizeof(info.bus_info));
 865                 strlcpy(info.driver, dev->dev.parent->driver->name,
 866                         sizeof(info.driver));
 867         } else {
 868                 return -EOPNOTSUPP;
 869         }
 870
 871         /*
 872          * this method of obtaining string set info is deprecated;
 873          * Use ETHTOOL_GSSET_INFO instead.
 874          */
 875         if (ops->get_sset_count) {
 876                 int rc;
 877
 878                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 879                 if (rc >= 0)
 880                         info.testinfo_len = rc;
 881                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 882                 if (rc >= 0)
 883                         info.n_stats = rc;
 884                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 885                 if (rc >= 0)
 886                         info.n_priv_flags = rc;
 887         }
 888         if (ops->get_regs_len)
 889                 info.regdump_len = ops->get_regs_len(dev);
 890         if (ops->get_eeprom_len)
 891                 info.eedump_len = ops->get_eeprom_len(dev);
 892
 893         if (copy_to_user(useraddr, &info, sizeof(info)))
 894                 return -EFAULT;
 895         return 0;
 896 }
 897
 898 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 899                                                     void __user *useraddr)
 900 {
 901         struct ethtool_sset_info info;
 902         u64 sset_mask;
 903         int i, idx = 0, n_bits = 0, ret, rc;
 904         u32 *info_buf = NULL;
 905
 906         if (copy_from_user(&info, useraddr, sizeof(info)))
 907                 return -EFAULT;
 908
 909         /* store copy of mask, because we zero struct later on */
 910         sset_mask = info.sset_mask;
 911         if (!sset_mask)
 912                 return 0;
 913
 914         /* calculate size of return buffer */
 915         n_bits = hweight64(sset_mask);
 916
 917         memset(&info, 0, sizeof(info));
 918         info.cmd = ETHTOOL_GSSET_INFO;
 919
 920         info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
 921         if (!info_buf)
 922                 return -ENOMEM;
 923
 924         /*
 925          * fill return buffer based on input bitmask and successful
 926          * get_sset_count return
 927          */
 928         for (i = 0; i < 64; i++) {
 929                 if (!(sset_mask & (1ULL << i)))
 930                         continue;
 931
 932                 rc = __ethtool_get_sset_count(dev, i);
 933                 if (rc >= 0) {
 934                         info.sset_mask |= (1ULL << i);
 935                         info_buf[idx++] = rc;
 936                 }
 937         }
 938
 939         ret = -EFAULT;
 940         if (copy_to_user(useraddr, &info, sizeof(info)))
 941                 goto out;
 942
 943         useraddr += offsetof(struct ethtool_sset_info, data);
 944         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 945                 goto out;
 946
 947         ret = 0;
 948
 949 out:
 950         kfree(info_buf);
 951         return ret;
 952 }
 953
 954 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 955                                                 u32 cmd, void __user *useraddr)
 956 {
 957         struct ethtool_rxnfc info;
 958         size_t info_size = sizeof(info);
 959         int rc;
 960
 961         if (!dev->ethtool_ops->set_rxnfc)
 962                 return -EOPNOTSUPP;
 963
 964         /* struct ethtool_rxnfc was originally defined for
 965          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 966          * members.  User-space might still be using that
 967          * definition. */
 968         if (cmd == ETHTOOL_SRXFH)
 969                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 970                              sizeof(info.data));
 971
 972         if (copy_from_user(&info, useraddr, info_size))
 973                 return -EFAULT;
 974
 975         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 976         if (rc)
 977                 return rc;
 978
 979         if (cmd == ETHTOOL_SRXCLSRLINS &&
 980             copy_to_user(useraddr, &info, info_size))
 981                 return -EFAULT;
 982
 983         return 0;
 984 }
 985
 986 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 987                                                 u32 cmd, void __user *useraddr)
 988 {
 989         struct ethtool_rxnfc info;
 990         size_t info_size = sizeof(info);
 991         const struct ethtool_ops *ops = dev->ethtool_ops;
 992         int ret;
 993         void *rule_buf = NULL;
 994
 995         if (!ops->get_rxnfc)
 996                 return -EOPNOTSUPP;
 997
 998         /* struct ethtool_rxnfc was originally defined for
 999          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1000          * members.  User-space might still be using that
1001          * definition. */
1002         if (cmd == ETHTOOL_GRXFH)
1003                 info_size = (offsetof(struct ethtool_rxnfc, data) +
1004                              sizeof(info.data));
1005
1006         if (copy_from_user(&info, useraddr, info_size))
1007                 return -EFAULT;
1008
1009         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1010                 if (info.rule_cnt > 0) {
1011                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1012                                 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1013                                                    GFP_USER);
1014                         if (!rule_buf)
1015                                 return -ENOMEM;
1016                 }
1017         }
1018
1019         ret = ops->get_rxnfc(dev, &info, rule_buf);
1020         if (ret < 0)
1021                 goto err_out;
1022
1023         ret = -EFAULT;
1024         if (copy_to_user(useraddr, &info, info_size))
1025                 goto err_out;
1026
1027         if (rule_buf) {
1028                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1029                 if (copy_to_user(useraddr, rule_buf,
1030                                  info.rule_cnt * sizeof(u32)))
1031                         goto err_out;
1032         }
1033         ret = 0;
1034
1035 err_out:
1036         kfree(rule_buf);
1037
1038         return ret;
1039 }
1040
1041 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1042                                         struct ethtool_rxnfc *rx_rings,
1043                                         u32 size)
1044 {
1045         int i;
1046
1047         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1048                 return -EFAULT;
1049
1050         /* Validate ring indices */
1051         for (i = 0; i < size; i++)
1052                 if (indir[i] >= rx_rings->data)
1053                         return -EINVAL;
1054
1055         return 0;
1056 }
1057
1058 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1059
1060 void netdev_rss_key_fill(void *buffer, size_t len)
1061 {
1062         BUG_ON(len > sizeof(netdev_rss_key));
1063         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1064         memcpy(buffer, netdev_rss_key, len);
1065 }
1066 EXPORT_SYMBOL(netdev_rss_key_fill);
1067
1068 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1069 {
1070         u32 dev_size, current_max = 0;
1071         u32 *indir;
1072         int ret;
1073
1074         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1075             !dev->ethtool_ops->get_rxfh)
1076                 return -EOPNOTSUPP;
1077         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1078         if (dev_size == 0)
1079                 return -EOPNOTSUPP;
1080
1081         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1082         if (!indir)
1083                 return -ENOMEM;
1084
1085         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1086         if (ret)
1087                 goto out;
1088
1089         while (dev_size--)
1090                 current_max = max(current_max, indir[dev_size]);
1091
1092         *max = current_max;
1093
1094 out:
1095         kfree(indir);
1096         return ret;
1097 }
1098
1099 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1100                                                      void __user *useraddr)
1101 {
1102         u32 user_size, dev_size;
1103         u32 *indir;
1104         int ret;
1105
1106         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1107             !dev->ethtool_ops->get_rxfh)
1108                 return -EOPNOTSUPP;
1109         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1110         if (dev_size == 0)
1111                 return -EOPNOTSUPP;
1112
1113         if (copy_from_user(&user_size,
1114                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1115                            sizeof(user_size)))
1116                 return -EFAULT;
1117
1118         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1119                          &dev_size, sizeof(dev_size)))
1120                 return -EFAULT;
1121
1122         /* If the user buffer size is 0, this is just a query for the
1123          * device table size.  Otherwise, if it's smaller than the
1124          * device table size it's an error.
1125          */
1126         if (user_size < dev_size)
1127                 return user_size == 0 ? 0 : -EINVAL;
1128
1129         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1130         if (!indir)
1131                 return -ENOMEM;
1132
1133         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1134         if (ret)
1135                 goto out;
1136
1137         if (copy_to_user(useraddr +
1138                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1139                          indir, dev_size * sizeof(indir[0])))
1140                 ret = -EFAULT;
1141
1142 out:
1143         kfree(indir);
1144         return ret;
1145 }
1146
1147 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1148                                                      void __user *useraddr)
1149 {
1150         struct ethtool_rxnfc rx_rings;
1151         u32 user_size, dev_size, i;
1152         u32 *indir;
1153         const struct ethtool_ops *ops = dev->ethtool_ops;
1154         int ret;
1155         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1156
1157         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1158             !ops->get_rxnfc)
1159                 return -EOPNOTSUPP;
1160
1161         dev_size = ops->get_rxfh_indir_size(dev);
1162         if (dev_size == 0)
1163                 return -EOPNOTSUPP;
1164
1165         if (copy_from_user(&user_size,
1166                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1167                            sizeof(user_size)))
1168                 return -EFAULT;
1169
1170         if (user_size != 0 && user_size != dev_size)
1171                 return -EINVAL;
1172
1173         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1174         if (!indir)
1175                 return -ENOMEM;
1176
1177         rx_rings.cmd = ETHTOOL_GRXRINGS;
1178         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1179         if (ret)
1180                 goto out;
1181
1182         if (user_size == 0) {
1183                 for (i = 0; i < dev_size; i++)
1184                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1185         } else {
1186                 ret = ethtool_copy_validate_indir(indir,
1187                                                   useraddr + ringidx_offset,
1188                                                   &rx_rings,
1189                                                   dev_size);
1190                 if (ret)
1191                         goto out;
1192         }
1193
1194         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1195         if (ret)
1196                 goto out;
1197
1198         /* indicate whether rxfh was set to default */
1199         if (user_size == 0)
1200                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1201         else
1202                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1203
1204 out:
1205         kfree(indir);
1206         return ret;
1207 }
1208
1209 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1210                                                void __user *useraddr)
1211 {
1212         int ret;
1213         const struct ethtool_ops *ops = dev->ethtool_ops;
1214         u32 user_indir_size, user_key_size;
1215         u32 dev_indir_size = 0, dev_key_size = 0;
1216         struct ethtool_rxfh rxfh;
1217         u32 total_size;
1218         u32 indir_bytes;
1219         u32 *indir = NULL;
1220         u8 dev_hfunc = 0;
1221         u8 *hkey = NULL;
1222         u8 *rss_config;
1223
1224         if (!ops->get_rxfh)
1225                 return -EOPNOTSUPP;
1226
1227         if (ops->get_rxfh_indir_size)
1228                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1229         if (ops->get_rxfh_key_size)
1230                 dev_key_size = ops->get_rxfh_key_size(dev);
1231
1232         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1233                 return -EFAULT;
1234         user_indir_size = rxfh.indir_size;
1235         user_key_size = rxfh.key_size;
1236
1237         /* Check that reserved fields are 0 for now */
1238         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1239             rxfh.rsvd8[2] || rxfh.rsvd32)
1240                 return -EINVAL;
1241
1242         rxfh.indir_size = dev_indir_size;
1243         rxfh.key_size = dev_key_size;
1244         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1245                 return -EFAULT;
1246
1247         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1248             (user_key_size && (user_key_size != dev_key_size)))
1249                 return -EINVAL;
1250
1251         indir_bytes = user_indir_size * sizeof(indir[0]);
1252         total_size = indir_bytes + user_key_size;
1253         rss_config = kzalloc(total_size, GFP_USER);
1254         if (!rss_config)
1255                 return -ENOMEM;
1256
1257         if (user_indir_size)
1258                 indir = (u32 *)rss_config;
1259
1260         if (user_key_size)
1261                 hkey = rss_config + indir_bytes;
1262
1263         ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1264         if (ret)
1265                 goto out;
1266
1267         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1268                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1269                 ret = -EFAULT;
1270         } else if (copy_to_user(useraddr +
1271                               offsetof(struct ethtool_rxfh, rss_config[0]),
1272                               rss_config, total_size)) {
1273                 ret = -EFAULT;
1274         }
1275 out:
1276         kfree(rss_config);
1277
1278         return ret;
1279 }
1280
1281 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1282                                                void __user *useraddr)
1283 {
1284         int ret;
1285         const struct ethtool_ops *ops = dev->ethtool_ops;
1286         struct ethtool_rxnfc rx_rings;
1287         struct ethtool_rxfh rxfh;
1288         u32 dev_indir_size = 0, dev_key_size = 0, i;
1289         u32 *indir = NULL, indir_bytes = 0;
1290         u8 *hkey = NULL;
1291         u8 *rss_config;
1292         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1293
1294         if (!ops->get_rxnfc || !ops->set_rxfh)
1295                 return -EOPNOTSUPP;
1296
1297         if (ops->get_rxfh_indir_size)
1298                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1299         if (ops->get_rxfh_key_size)
1300                 dev_key_size = ops->get_rxfh_key_size(dev);
1301
1302         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1303                 return -EFAULT;
1304
1305         /* Check that reserved fields are 0 for now */
1306         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1307             rxfh.rsvd8[2] || rxfh.rsvd32)
1308                 return -EINVAL;
1309
1310         /* If either indir, hash key or function is valid, proceed further.
1311          * Must request at least one change: indir size, hash key or function.
1312          */
1313         if ((rxfh.indir_size &&
1314              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1315              rxfh.indir_size != dev_indir_size) ||
1316             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1317             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1318              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1319                 return -EINVAL;
1320
1321         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1322                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1323
1324         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1325         if (!rss_config)
1326                 return -ENOMEM;
1327
1328         rx_rings.cmd = ETHTOOL_GRXRINGS;
1329         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1330         if (ret)
1331                 goto out;
1332
1333         /* rxfh.indir_size == 0 means reset the indir table to default.
1334          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1335          */
1336         if (rxfh.indir_size &&
1337             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1338                 indir = (u32 *)rss_config;
1339                 ret = ethtool_copy_validate_indir(indir,
1340                                                   useraddr + rss_cfg_offset,
1341                                                   &rx_rings,
1342                                                   rxfh.indir_size);
1343                 if (ret)
1344                         goto out;
1345         } else if (rxfh.indir_size == 0) {
1346                 indir = (u32 *)rss_config;
1347                 for (i = 0; i < dev_indir_size; i++)
1348                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1349         }
1350
1351         if (rxfh.key_size) {
1352                 hkey = rss_config + indir_bytes;
1353                 if (copy_from_user(hkey,
1354                                    useraddr + rss_cfg_offset + indir_bytes,
1355                                    rxfh.key_size)) {
1356                         ret = -EFAULT;
1357                         goto out;
1358                 }
1359         }
1360
1361         ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1362         if (ret)
1363                 goto out;
1364
1365         /* indicate whether rxfh was set to default */
1366         if (rxfh.indir_size == 0)
1367                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1368         else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1369                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1370
1371 out:
1372         kfree(rss_config);
1373         return ret;
1374 }
1375
1376 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1377 {
1378         struct ethtool_regs regs;
1379         const struct ethtool_ops *ops = dev->ethtool_ops;
1380         void *regbuf;
1381         int reglen, ret;
1382
1383         if (!ops->get_regs || !ops->get_regs_len)
1384                 return -EOPNOTSUPP;
1385
1386         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1387                 return -EFAULT;
1388
1389         reglen = ops->get_regs_len(dev);
1390         if (regs.len > reglen)
1391                 regs.len = reglen;
1392
1393         regbuf = vzalloc(reglen);
1394         if (reglen && !regbuf)
1395                 return -ENOMEM;
1396
1397         ops->get_regs(dev, &regs, regbuf);
1398
1399         ret = -EFAULT;
1400         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1401                 goto out;
1402         useraddr += offsetof(struct ethtool_regs, data);
1403         if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1404                 goto out;
1405         ret = 0;
1406
1407  out:
1408         vfree(regbuf);
1409         return ret;
1410 }
1411
1412 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1413 {
1414         struct ethtool_value reset;
1415         int ret;
1416
1417         if (!dev->ethtool_ops->reset)
1418                 return -EOPNOTSUPP;
1419
1420         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1421                 return -EFAULT;
1422
1423         ret = dev->ethtool_ops->reset(dev, &reset.data);
1424         if (ret)
1425                 return ret;
1426
1427         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1428                 return -EFAULT;
1429         return 0;
1430 }
1431
1432 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1433 {
1434         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1435
1436         if (!dev->ethtool_ops->get_wol)
1437                 return -EOPNOTSUPP;
1438
1439         dev->ethtool_ops->get_wol(dev, &wol);
1440
1441         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1442                 return -EFAULT;
1443         return 0;
1444 }
1445
1446 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1447 {
1448         struct ethtool_wolinfo wol;
1449
1450         if (!dev->ethtool_ops->set_wol)
1451                 return -EOPNOTSUPP;
1452
1453         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1454                 return -EFAULT;
1455
1456         return dev->ethtool_ops->set_wol(dev, &wol);
1457 }
1458
1459 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1460 {
1461         struct ethtool_eee edata;
1462         int rc;
1463
1464         if (!dev->ethtool_ops->get_eee)
1465                 return -EOPNOTSUPP;
1466
1467         memset(&edata, 0, sizeof(struct ethtool_eee));
1468         edata.cmd = ETHTOOL_GEEE;
1469         rc = dev->ethtool_ops->get_eee(dev, &edata);
1470
1471         if (rc)
1472                 return rc;
1473
1474         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1475                 return -EFAULT;
1476
1477         return 0;
1478 }
1479
1480 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1481 {
1482         struct ethtool_eee edata;
1483
1484         if (!dev->ethtool_ops->set_eee)
1485                 return -EOPNOTSUPP;
1486
1487         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1488                 return -EFAULT;
1489
1490         return dev->ethtool_ops->set_eee(dev, &edata);
1491 }
1492
1493 static int ethtool_nway_reset(struct net_device *dev)
1494 {
1495         if (!dev->ethtool_ops->nway_reset)
1496                 return -EOPNOTSUPP;
1497
1498         return dev->ethtool_ops->nway_reset(dev);
1499 }
1500
1501 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1502 {
1503         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1504
1505         if (!dev->ethtool_ops->get_link)
1506                 return -EOPNOTSUPP;
1507
1508         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1509
1510         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1511                 return -EFAULT;
1512         return 0;
1513 }
1514
1515 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1516                                   int (*getter)(struct net_device *,
1517                                                 struct ethtool_eeprom *, u8 *),
1518                                   u32 total_len)
1519 {
1520         struct ethtool_eeprom eeprom;
1521         void __user *userbuf = useraddr + sizeof(eeprom);
1522         u32 bytes_remaining;
1523         u8 *data;
1524         int ret = 0;
1525
1526         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1527                 return -EFAULT;
1528
1529         /* Check for wrap and zero */
1530         if (eeprom.offset + eeprom.len <= eeprom.offset)
1531                 return -EINVAL;
1532
1533         /* Check for exceeding total eeprom len */
1534         if (eeprom.offset + eeprom.len > total_len)
1535                 return -EINVAL;
1536
1537         data = kmalloc(PAGE_SIZE, GFP_USER);
1538         if (!data)
1539                 return -ENOMEM;
1540
1541         bytes_remaining = eeprom.len;
1542         while (bytes_remaining > 0) {
1543                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1544
1545                 ret = getter(dev, &eeprom, data);
1546                 if (ret)
1547                         break;
1548                 if (copy_to_user(userbuf, data, eeprom.len)) {
1549                         ret = -EFAULT;
1550                         break;
1551                 }
1552                 userbuf += eeprom.len;
1553                 eeprom.offset += eeprom.len;
1554                 bytes_remaining -= eeprom.len;
1555         }
1556
1557         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1558         eeprom.offset -= eeprom.len;
1559         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1560                 ret = -EFAULT;
1561
1562         kfree(data);
1563         return ret;
1564 }
1565
1566 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1567 {
1568         const struct ethtool_ops *ops = dev->ethtool_ops;
1569
1570         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1571             !ops->get_eeprom_len(dev))
1572                 return -EOPNOTSUPP;
1573
1574         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1575                                       ops->get_eeprom_len(dev));
1576 }
1577
1578 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1579 {
1580         struct ethtool_eeprom eeprom;
1581         const struct ethtool_ops *ops = dev->ethtool_ops;
1582         void __user *userbuf = useraddr + sizeof(eeprom);
1583         u32 bytes_remaining;
1584         u8 *data;
1585         int ret = 0;
1586
1587         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1588             !ops->get_eeprom_len(dev))
1589                 return -EOPNOTSUPP;
1590
1591         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1592                 return -EFAULT;
1593
1594         /* Check for wrap and zero */
1595         if (eeprom.offset + eeprom.len <= eeprom.offset)
1596                 return -EINVAL;
1597
1598         /* Check for exceeding total eeprom len */
1599         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1600                 return -EINVAL;
1601
1602         data = kmalloc(PAGE_SIZE, GFP_USER);
1603         if (!data)
1604                 return -ENOMEM;
1605
1606         bytes_remaining = eeprom.len;
1607         while (bytes_remaining > 0) {
1608                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1609
1610                 if (copy_from_user(data, userbuf, eeprom.len)) {
1611                         ret = -EFAULT;
1612                         break;
1613                 }
1614                 ret = ops->set_eeprom(dev, &eeprom, data);
1615                 if (ret)
1616                         break;
1617                 userbuf += eeprom.len;
1618                 eeprom.offset += eeprom.len;
1619                 bytes_remaining -= eeprom.len;
1620         }
1621
1622         kfree(data);
1623         return ret;
1624 }
1625
1626 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1627                                                    void __user *useraddr)
1628 {
1629         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1630
1631         if (!dev->ethtool_ops->get_coalesce)
1632                 return -EOPNOTSUPP;
1633
1634         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1635
1636         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1637                 return -EFAULT;
1638         return 0;
1639 }
1640
1641 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1642                                                    void __user *useraddr)
1643 {
1644         struct ethtool_coalesce coalesce;
1645
1646         if (!dev->ethtool_ops->set_coalesce)
1647                 return -EOPNOTSUPP;
1648
1649         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1650                 return -EFAULT;
1651
1652         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1653 }
1654
1655 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1656 {
1657         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1658
1659         if (!dev->ethtool_ops->get_ringparam)
1660                 return -EOPNOTSUPP;
1661
1662         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1663
1664         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1665                 return -EFAULT;
1666         return 0;
1667 }
1668
1669 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1670 {
1671         struct ethtool_ringparam ringparam;
1672
1673         if (!dev->ethtool_ops->set_ringparam)
1674                 return -EOPNOTSUPP;
1675
1676         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1677                 return -EFAULT;
1678
1679         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1680 }
1681
1682 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1683                                                    void __user *useraddr)
1684 {
1685         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1686
1687         if (!dev->ethtool_ops->get_channels)
1688                 return -EOPNOTSUPP;
1689
1690         dev->ethtool_ops->get_channels(dev, &channels);
1691
1692         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1693                 return -EFAULT;
1694         return 0;
1695 }
1696
1697 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1698                                                    void __user *useraddr)
1699 {
1700         struct ethtool_channels channels, max;
1701         u32 max_rx_in_use = 0;
1702
1703         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1704                 return -EOPNOTSUPP;
1705
1706         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1707                 return -EFAULT;
1708
1709         dev->ethtool_ops->get_channels(dev, &max);
1710
1711         /* ensure new counts are within the maximums */
1712         if ((channels.rx_count > max.max_rx) ||
1713             (channels.tx_count > max.max_tx) ||
1714             (channels.combined_count > max.max_combined) ||
1715             (channels.other_count > max.max_other))
1716                 return -EINVAL;
1717
1718         /* ensure the new Rx count fits within the configured Rx flow
1719          * indirection table settings */
1720         if (netif_is_rxfh_configured(dev) &&
1721             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1722             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1723             return -EINVAL;
1724
1725         return dev->ethtool_ops->set_channels(dev, &channels);
1726 }
1727
1728 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1729 {
1730         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1731
1732         if (!dev->ethtool_ops->get_pauseparam)
1733                 return -EOPNOTSUPP;
1734
1735         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1736
1737         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1738                 return -EFAULT;
1739         return 0;
1740 }
1741
1742 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1743 {
1744         struct ethtool_pauseparam pauseparam;
1745
1746         if (!dev->ethtool_ops->set_pauseparam)
1747                 return -EOPNOTSUPP;
1748
1749         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1750                 return -EFAULT;
1751
1752         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1753 }
1754
1755 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1756 {
1757         struct ethtool_test test;
1758         const struct ethtool_ops *ops = dev->ethtool_ops;
1759         u64 *data;
1760         int ret, test_len;
1761
1762         if (!ops->self_test || !ops->get_sset_count)
1763                 return -EOPNOTSUPP;
1764
1765         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1766         if (test_len < 0)
1767                 return test_len;
1768         WARN_ON(test_len == 0);
1769
1770         if (copy_from_user(&test, useraddr, sizeof(test)))
1771                 return -EFAULT;
1772
1773         test.len = test_len;
1774         data = kmalloc(test_len * sizeof(u64), GFP_USER);
1775         if (!data)
1776                 return -ENOMEM;
1777
1778         ops->self_test(dev, &test, data);
1779
1780         ret = -EFAULT;
1781         if (copy_to_user(useraddr, &test, sizeof(test)))
1782                 goto out;
1783         useraddr += sizeof(test);
1784         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1785                 goto out;
1786         ret = 0;
1787
1788  out:
1789         kfree(data);
1790         return ret;
1791 }
1792
1793 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1794 {
1795         struct ethtool_gstrings gstrings;
1796         u8 *data;
1797         int ret;
1798
1799         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1800                 return -EFAULT;
1801
1802         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1803         if (ret < 0)
1804                 return ret;
1805
1806         gstrings.len = ret;
1807
1808         data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1809         if (!data)
1810                 return -ENOMEM;
1811
1812         __ethtool_get_strings(dev, gstrings.string_set, data);
1813
1814         ret = -EFAULT;
1815         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1816                 goto out;
1817         useraddr += sizeof(gstrings);
1818         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1819                 goto out;
1820         ret = 0;
1821
1822 out:
1823         kfree(data);
1824         return ret;
1825 }
1826
1827 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1828 {
1829         struct ethtool_value id;
1830         static bool busy;
1831         const struct ethtool_ops *ops = dev->ethtool_ops;
1832         int rc;
1833
1834         if (!ops->set_phys_id)
1835                 return -EOPNOTSUPP;
1836
1837         if (busy)
1838                 return -EBUSY;
1839
1840         if (copy_from_user(&id, useraddr, sizeof(id)))
1841                 return -EFAULT;
1842
1843         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1844         if (rc < 0)
1845                 return rc;
1846
1847         /* Drop the RTNL lock while waiting, but prevent reentry or
1848          * removal of the device.
1849          */
1850         busy = true;
1851         dev_hold(dev);
1852         rtnl_unlock();
1853
1854         if (rc == 0) {
1855                 /* Driver will handle this itself */
1856                 schedule_timeout_interruptible(
1857                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1858         } else {
1859                 /* Driver expects to be called at twice the frequency in rc */
1860                 int n = rc * 2, i, interval = HZ / n;
1861
1862                 /* Count down seconds */
1863                 do {
1864                         /* Count down iterations per second */
1865                         i = n;
1866                         do {
1867                                 rtnl_lock();
1868                                 rc = ops->set_phys_id(dev,
1869                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1870                                 rtnl_unlock();
1871                                 if (rc)
1872                                         break;
1873                                 schedule_timeout_interruptible(interval);
1874                         } while (!signal_pending(current) && --i != 0);
1875                 } while (!signal_pending(current) &&
1876                          (id.data == 0 || --id.data != 0));
1877         }
1878
1879         rtnl_lock();
1880         dev_put(dev);
1881         busy = false;
1882
1883         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1884         return rc;
1885 }
1886
1887 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1888 {
1889         struct ethtool_stats stats;
1890         const struct ethtool_ops *ops = dev->ethtool_ops;
1891         u64 *data;
1892         int ret, n_stats;
1893
1894         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1895                 return -EOPNOTSUPP;
1896
1897         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1898         if (n_stats < 0)
1899                 return n_stats;
1900         WARN_ON(n_stats == 0);
1901
1902         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1903                 return -EFAULT;
1904
1905         stats.n_stats = n_stats;
1906         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1907         if (!data)
1908                 return -ENOMEM;
1909
1910         ops->get_ethtool_stats(dev, &stats, data);
1911
1912         ret = -EFAULT;
1913         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1914                 goto out;
1915         useraddr += sizeof(stats);
1916         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1917                 goto out;
1918         ret = 0;
1919
1920  out:
1921         kfree(data);
1922         return ret;
1923 }
1924
1925 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1926 {
1927         struct ethtool_stats stats;
1928         struct phy_device *phydev = dev->phydev;
1929         u64 *data;
1930         int ret, n_stats;
1931
1932         if (!phydev)
1933                 return -EOPNOTSUPP;
1934
1935         n_stats = phy_get_sset_count(phydev);
1936
1937         if (n_stats < 0)
1938                 return n_stats;
1939         WARN_ON(n_stats == 0);
1940
1941         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1942                 return -EFAULT;
1943
1944         stats.n_stats = n_stats;
1945         data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1946         if (!data)
1947                 return -ENOMEM;
1948
1949         mutex_lock(&phydev->lock);
1950         phydev->drv->get_stats(phydev, &stats, data);
1951         mutex_unlock(&phydev->lock);
1952
1953         ret = -EFAULT;
1954         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1955                 goto out;
1956         useraddr += sizeof(stats);
1957         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1958                 goto out;
1959         ret = 0;
1960
1961  out:
1962         kfree(data);
1963         return ret;
1964 }
1965
1966 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1967 {
1968         struct ethtool_perm_addr epaddr;
1969
1970         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1971                 return -EFAULT;
1972
1973         if (epaddr.size < dev->addr_len)
1974                 return -ETOOSMALL;
1975         epaddr.size = dev->addr_len;
1976
1977         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1978                 return -EFAULT;
1979         useraddr += sizeof(epaddr);
1980         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1981                 return -EFAULT;
1982         return 0;
1983 }
1984
1985 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1986                              u32 cmd, u32 (*actor)(struct net_device *))
1987 {
1988         struct ethtool_value edata = { .cmd = cmd };
1989
1990         if (!actor)
1991                 return -EOPNOTSUPP;
1992
1993         edata.data = actor(dev);
1994
1995         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1996                 return -EFAULT;
1997         return 0;
1998 }
1999
2000 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2001                              void (*actor)(struct net_device *, u32))
2002 {
2003         struct ethtool_value edata;
2004
2005         if (!actor)
2006                 return -EOPNOTSUPP;
2007
2008         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2009                 return -EFAULT;
2010
2011         actor(dev, edata.data);
2012         return 0;
2013 }
2014
2015 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2016                              int (*actor)(struct net_device *, u32))
2017 {
2018         struct ethtool_value edata;
2019
2020         if (!actor)
2021                 return -EOPNOTSUPP;
2022
2023         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2024                 return -EFAULT;
2025
2026         return actor(dev, edata.data);
2027 }
2028
2029 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2030                                                    char __user *useraddr)
2031 {
2032         struct ethtool_flash efl;
2033
2034         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2035                 return -EFAULT;
2036
2037         if (!dev->ethtool_ops->flash_device)
2038                 return -EOPNOTSUPP;
2039
2040         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2041
2042         return dev->ethtool_ops->flash_device(dev, &efl);
2043 }
2044
2045 static int ethtool_set_dump(struct net_device *dev,
2046                         void __user *useraddr)
2047 {
2048         struct ethtool_dump dump;
2049
2050         if (!dev->ethtool_ops->set_dump)
2051                 return -EOPNOTSUPP;
2052
2053         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2054                 return -EFAULT;
2055
2056         return dev->ethtool_ops->set_dump(dev, &dump);
2057 }
2058
2059 static int ethtool_get_dump_flag(struct net_device *dev,
2060                                 void __user *useraddr)
2061 {
2062         int ret;
2063         struct ethtool_dump dump;
2064         const struct ethtool_ops *ops = dev->ethtool_ops;
2065
2066         if (!ops->get_dump_flag)
2067                 return -EOPNOTSUPP;
2068
2069         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2070                 return -EFAULT;
2071
2072         ret = ops->get_dump_flag(dev, &dump);
2073         if (ret)
2074                 return ret;
2075
2076         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2077                 return -EFAULT;
2078         return 0;
2079 }
2080
2081 static int ethtool_get_dump_data(struct net_device *dev,
2082                                 void __user *useraddr)
2083 {
2084         int ret;
2085         __u32 len;
2086         struct ethtool_dump dump, tmp;
2087         const struct ethtool_ops *ops = dev->ethtool_ops;
2088         void *data = NULL;
2089
2090         if (!ops->get_dump_data || !ops->get_dump_flag)
2091                 return -EOPNOTSUPP;
2092
2093         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2094                 return -EFAULT;
2095
2096         memset(&tmp, 0, sizeof(tmp));
2097         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2098         ret = ops->get_dump_flag(dev, &tmp);
2099         if (ret)
2100                 return ret;
2101
2102         len = min(tmp.len, dump.len);
2103         if (!len)
2104                 return -EFAULT;
2105
2106         /* Don't ever let the driver think there's more space available
2107          * than it requested with .get_dump_flag().
2108          */
2109         dump.len = len;
2110
2111         /* Always allocate enough space to hold the whole thing so that the
2112          * driver does not need to check the length and bother with partial
2113          * dumping.
2114          */
2115         data = vzalloc(tmp.len);
2116         if (!data)
2117                 return -ENOMEM;
2118         ret = ops->get_dump_data(dev, &dump, data);
2119         if (ret)
2120                 goto out;
2121
2122         /* There are two sane possibilities:
2123          * 1. The driver's .get_dump_data() does not touch dump.len.
2124          * 2. Or it may set dump.len to how much it really writes, which
2125          *    should be tmp.len (or len if it can do a partial dump).
2126          * In any case respond to userspace with the actual length of data
2127          * it's receiving.
2128          */
2129         WARN_ON(dump.len != len && dump.len != tmp.len);
2130         dump.len = len;
2131
2132         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2133                 ret = -EFAULT;
2134                 goto out;
2135         }
2136         useraddr += offsetof(struct ethtool_dump, data);
2137         if (copy_to_user(useraddr, data, len))
2138                 ret = -EFAULT;
2139 out:
2140         vfree(data);
2141         return ret;
2142 }
2143
2144 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2145 {
2146         int err = 0;
2147         struct ethtool_ts_info info;
2148         const struct ethtool_ops *ops = dev->ethtool_ops;
2149         struct phy_device *phydev = dev->phydev;
2150
2151         memset(&info, 0, sizeof(info));
2152         info.cmd = ETHTOOL_GET_TS_INFO;
2153
2154         if (phydev && phydev->drv && phydev->drv->ts_info) {
2155                 err = phydev->drv->ts_info(phydev, &info);
2156         } else if (ops->get_ts_info) {
2157                 err = ops->get_ts_info(dev, &info);
2158         } else {
2159                 info.so_timestamping =
2160                         SOF_TIMESTAMPING_RX_SOFTWARE |
2161                         SOF_TIMESTAMPING_SOFTWARE;
2162                 info.phc_index = -1;
2163         }
2164
2165         if (err)
2166                 return err;
2167
2168         if (copy_to_user(useraddr, &info, sizeof(info)))
2169                 err = -EFAULT;
2170
2171         return err;
2172 }
2173
2174 static int __ethtool_get_module_info(struct net_device *dev,
2175                                      struct ethtool_modinfo *modinfo)
2176 {
2177         const struct ethtool_ops *ops = dev->ethtool_ops;
2178         struct phy_device *phydev = dev->phydev;
2179
2180         if (phydev && phydev->drv && phydev->drv->module_info)
2181                 return phydev->drv->module_info(phydev, modinfo);
2182
2183         if (ops->get_module_info)
2184                 return ops->get_module_info(dev, modinfo);
2185
2186         return -EOPNOTSUPP;
2187 }
2188
2189 static int ethtool_get_module_info(struct net_device *dev,
2190                                    void __user *useraddr)
2191 {
2192         int ret;
2193         struct ethtool_modinfo modinfo;
2194
2195         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2196                 return -EFAULT;
2197
2198         ret = __ethtool_get_module_info(dev, &modinfo);
2199         if (ret)
2200                 return ret;
2201
2202         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2203                 return -EFAULT;
2204
2205         return 0;
2206 }
2207
2208 static int __ethtool_get_module_eeprom(struct net_device *dev,
2209                                        struct ethtool_eeprom *ee, u8 *data)
2210 {
2211         const struct ethtool_ops *ops = dev->ethtool_ops;
2212         struct phy_device *phydev = dev->phydev;
2213
2214         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2215                 return phydev->drv->module_eeprom(phydev, ee, data);
2216
2217         if (ops->get_module_eeprom)
2218                 return ops->get_module_eeprom(dev, ee, data);
2219
2220         return -EOPNOTSUPP;
2221 }
2222
2223 static int ethtool_get_module_eeprom(struct net_device *dev,
2224                                      void __user *useraddr)
2225 {
2226         int ret;
2227         struct ethtool_modinfo modinfo;
2228
2229         ret = __ethtool_get_module_info(dev, &modinfo);
2230         if (ret)
2231                 return ret;
2232
2233         return ethtool_get_any_eeprom(dev, useraddr,
2234                                       __ethtool_get_module_eeprom,
2235                                       modinfo.eeprom_len);
2236 }
2237
2238 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2239 {
2240         switch (tuna->id) {
2241         case ETHTOOL_RX_COPYBREAK:
2242         case ETHTOOL_TX_COPYBREAK:
2243                 if (tuna->len != sizeof(u32) ||
2244                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2245                         return -EINVAL;
2246                 break;
2247         default:
2248                 return -EINVAL;
2249         }
2250
2251         return 0;
2252 }
2253
2254 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2255 {
2256         int ret;
2257         struct ethtool_tunable tuna;
2258         const struct ethtool_ops *ops = dev->ethtool_ops;
2259         void *data;
2260
2261         if (!ops->get_tunable)
2262                 return -EOPNOTSUPP;
2263         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2264                 return -EFAULT;
2265         ret = ethtool_tunable_valid(&tuna);
2266         if (ret)
2267                 return ret;
2268         data = kmalloc(tuna.len, GFP_USER);
2269         if (!data)
2270                 return -ENOMEM;
2271         ret = ops->get_tunable(dev, &tuna, data);
2272         if (ret)
2273                 goto out;
2274         useraddr += sizeof(tuna);
2275         ret = -EFAULT;
2276         if (copy_to_user(useraddr, data, tuna.len))
2277                 goto out;
2278         ret = 0;
2279
2280 out:
2281         kfree(data);
2282         return ret;
2283 }
2284
2285 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2286 {
2287         int ret;
2288         struct ethtool_tunable tuna;
2289         const struct ethtool_ops *ops = dev->ethtool_ops;
2290         void *data;
2291
2292         if (!ops->set_tunable)
2293                 return -EOPNOTSUPP;
2294         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2295                 return -EFAULT;
2296         ret = ethtool_tunable_valid(&tuna);
2297         if (ret)
2298                 return ret;
2299         data = kmalloc(tuna.len, GFP_USER);
2300         if (!data)
2301                 return -ENOMEM;
2302         useraddr += sizeof(tuna);
2303         ret = -EFAULT;
2304         if (copy_from_user(data, useraddr, tuna.len))
2305                 goto out;
2306         ret = ops->set_tunable(dev, &tuna, data);
2307
2308 out:
2309         kfree(data);
2310         return ret;
2311 }
2312
2313 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2314                                           void __user *useraddr,
2315                                           struct ethtool_per_queue_op *per_queue_opt)
2316 {
2317         u32 bit;
2318         int ret;
2319         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2320
2321         if (!dev->ethtool_ops->get_per_queue_coalesce)
2322                 return -EOPNOTSUPP;
2323
2324         useraddr += sizeof(*per_queue_opt);
2325
2326         bitmap_from_u32array(queue_mask,
2327                              MAX_NUM_QUEUE,
2328                              per_queue_opt->queue_mask,
2329                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2330
2331         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2332                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2333
2334                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2335                 if (ret != 0)
2336                         return ret;
2337                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2338                         return -EFAULT;
2339                 useraddr += sizeof(coalesce);
2340         }
2341
2342         return 0;
2343 }
2344
2345 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2346                                           void __user *useraddr,
2347                                           struct ethtool_per_queue_op *per_queue_opt)
2348 {
2349         u32 bit;
2350         int i, ret = 0;
2351         int n_queue;
2352         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2353         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2354
2355         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2356             (!dev->ethtool_ops->get_per_queue_coalesce))
2357                 return -EOPNOTSUPP;
2358
2359         useraddr += sizeof(*per_queue_opt);
2360
2361         bitmap_from_u32array(queue_mask,
2362                              MAX_NUM_QUEUE,
2363                              per_queue_opt->queue_mask,
2364                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2365         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2366         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2367         if (!backup)
2368                 return -ENOMEM;
2369
2370         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2371                 struct ethtool_coalesce coalesce;
2372
2373                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2374                 if (ret != 0)
2375                         goto roll_back;
2376
2377                 tmp++;
2378
2379                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2380                         ret = -EFAULT;
2381                         goto roll_back;
2382                 }
2383
2384                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2385                 if (ret != 0)
2386                         goto roll_back;
2387
2388                 useraddr += sizeof(coalesce);
2389         }
2390
2391 roll_back:
2392         if (ret != 0) {
2393                 tmp = backup;
2394                 for_each_set_bit(i, queue_mask, bit) {
2395                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2396                         tmp++;
2397                 }
2398         }
2399         kfree(backup);
2400
2401         return ret;
2402 }
2403
2404 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2405 {
2406         struct ethtool_per_queue_op per_queue_opt;
2407
2408         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2409                 return -EFAULT;
2410
2411         switch (per_queue_opt.sub_command) {
2412         case ETHTOOL_GCOALESCE:
2413                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2414         case ETHTOOL_SCOALESCE:
2415                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2416         default:
2417                 return -EOPNOTSUPP;
2418         };
2419 }
2420
2421 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2422
2423 int dev_ethtool(struct net *net, struct ifreq *ifr)
2424 {
2425         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2426         void __user *useraddr = ifr->ifr_data;
2427         u32 ethcmd, sub_cmd;
2428         int rc;
2429         netdev_features_t old_features;
2430
2431         if (!dev || !netif_device_present(dev))
2432                 return -ENODEV;
2433
2434         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2435                 return -EFAULT;
2436
2437         if (ethcmd == ETHTOOL_PERQUEUE) {
2438                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2439                         return -EFAULT;
2440         } else {
2441                 sub_cmd = ethcmd;
2442         }
2443         /* Allow some commands to be done by anyone */
2444         switch (sub_cmd) {
2445         case ETHTOOL_GSET:
2446         case ETHTOOL_GDRVINFO:
2447         case ETHTOOL_GMSGLVL:
2448         case ETHTOOL_GLINK:
2449         case ETHTOOL_GCOALESCE:
2450         case ETHTOOL_GRINGPARAM:
2451         case ETHTOOL_GPAUSEPARAM:
2452         case ETHTOOL_GRXCSUM:
2453         case ETHTOOL_GTXCSUM:
2454         case ETHTOOL_GSG:
2455         case ETHTOOL_GSSET_INFO:
2456         case ETHTOOL_GSTRINGS:
2457         case ETHTOOL_GSTATS:
2458         case ETHTOOL_GPHYSTATS:
2459         case ETHTOOL_GTSO:
2460         case ETHTOOL_GPERMADDR:
2461         case ETHTOOL_GUFO:
2462         case ETHTOOL_GGSO:
2463         case ETHTOOL_GGRO:
2464         case ETHTOOL_GFLAGS:
2465         case ETHTOOL_GPFLAGS:
2466         case ETHTOOL_GRXFH:
2467         case ETHTOOL_GRXRINGS:
2468         case ETHTOOL_GRXCLSRLCNT:
2469         case ETHTOOL_GRXCLSRULE:
2470         case ETHTOOL_GRXCLSRLALL:
2471         case ETHTOOL_GRXFHINDIR:
2472         case ETHTOOL_GRSSH:
2473         case ETHTOOL_GFEATURES:
2474         case ETHTOOL_GCHANNELS:
2475         case ETHTOOL_GET_TS_INFO:
2476         case ETHTOOL_GEEE:
2477         case ETHTOOL_GTUNABLE:
2478                 break;
2479         default:
2480                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2481                         return -EPERM;
2482         }
2483
2484         if (dev->ethtool_ops->begin) {
2485                 rc = dev->ethtool_ops->begin(dev);
2486                 if (rc  < 0)
2487                         return rc;
2488         }
2489         old_features = dev->features;
2490
2491         switch (ethcmd) {
2492         case ETHTOOL_GSET:
2493                 rc = ethtool_get_settings(dev, useraddr);
2494                 break;
2495         case ETHTOOL_SSET:
2496                 rc = ethtool_set_settings(dev, useraddr);
2497                 break;
2498         case ETHTOOL_GDRVINFO:
2499                 rc = ethtool_get_drvinfo(dev, useraddr);
2500                 break;
2501         case ETHTOOL_GREGS:
2502                 rc = ethtool_get_regs(dev, useraddr);
2503                 break;
2504         case ETHTOOL_GWOL:
2505                 rc = ethtool_get_wol(dev, useraddr);
2506                 break;
2507         case ETHTOOL_SWOL:
2508                 rc = ethtool_set_wol(dev, useraddr);
2509                 break;
2510         case ETHTOOL_GMSGLVL:
2511                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2512                                        dev->ethtool_ops->get_msglevel);
2513                 break;
2514         case ETHTOOL_SMSGLVL:
2515                 rc = ethtool_set_value_void(dev, useraddr,
2516                                        dev->ethtool_ops->set_msglevel);
2517                 break;
2518         case ETHTOOL_GEEE:
2519                 rc = ethtool_get_eee(dev, useraddr);
2520                 break;
2521         case ETHTOOL_SEEE:
2522                 rc = ethtool_set_eee(dev, useraddr);
2523                 break;
2524         case ETHTOOL_NWAY_RST:
2525                 rc = ethtool_nway_reset(dev);
2526                 break;
2527         case ETHTOOL_GLINK:
2528                 rc = ethtool_get_link(dev, useraddr);
2529                 break;
2530         case ETHTOOL_GEEPROM:
2531                 rc = ethtool_get_eeprom(dev, useraddr);
2532                 break;
2533         case ETHTOOL_SEEPROM:
2534                 rc = ethtool_set_eeprom(dev, useraddr);
2535                 break;
2536         case ETHTOOL_GCOALESCE:
2537                 rc = ethtool_get_coalesce(dev, useraddr);
2538                 break;
2539         case ETHTOOL_SCOALESCE:
2540                 rc = ethtool_set_coalesce(dev, useraddr);
2541                 break;
2542         case ETHTOOL_GRINGPARAM:
2543                 rc = ethtool_get_ringparam(dev, useraddr);
2544                 break;
2545         case ETHTOOL_SRINGPARAM:
2546                 rc = ethtool_set_ringparam(dev, useraddr);
2547                 break;
2548         case ETHTOOL_GPAUSEPARAM:
2549                 rc = ethtool_get_pauseparam(dev, useraddr);
2550                 break;
2551         case ETHTOOL_SPAUSEPARAM:
2552                 rc = ethtool_set_pauseparam(dev, useraddr);
2553                 break;
2554         case ETHTOOL_TEST:
2555                 rc = ethtool_self_test(dev, useraddr);
2556                 break;
2557         case ETHTOOL_GSTRINGS:
2558                 rc = ethtool_get_strings(dev, useraddr);
2559                 break;
2560         case ETHTOOL_PHYS_ID:
2561                 rc = ethtool_phys_id(dev, useraddr);
2562                 break;
2563         case ETHTOOL_GSTATS:
2564                 rc = ethtool_get_stats(dev, useraddr);
2565                 break;
2566         case ETHTOOL_GPERMADDR:
2567                 rc = ethtool_get_perm_addr(dev, useraddr);
2568                 break;
2569         case ETHTOOL_GFLAGS:
2570                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2571                                         __ethtool_get_flags);
2572                 break;
2573         case ETHTOOL_SFLAGS:
2574                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2575                 break;
2576         case ETHTOOL_GPFLAGS:
2577                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2578                                        dev->ethtool_ops->get_priv_flags);
2579                 break;
2580         case ETHTOOL_SPFLAGS:
2581                 rc = ethtool_set_value(dev, useraddr,
2582                                        dev->ethtool_ops->set_priv_flags);
2583                 break;
2584         case ETHTOOL_GRXFH:
2585         case ETHTOOL_GRXRINGS:
2586         case ETHTOOL_GRXCLSRLCNT:
2587         case ETHTOOL_GRXCLSRULE:
2588         case ETHTOOL_GRXCLSRLALL:
2589                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2590                 break;
2591         case ETHTOOL_SRXFH:
2592         case ETHTOOL_SRXCLSRLDEL:
2593         case ETHTOOL_SRXCLSRLINS:
2594                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2595                 break;
2596         case ETHTOOL_FLASHDEV:
2597                 rc = ethtool_flash_device(dev, useraddr);
2598                 break;
2599         case ETHTOOL_RESET:
2600                 rc = ethtool_reset(dev, useraddr);
2601                 break;
2602         case ETHTOOL_GSSET_INFO:
2603                 rc = ethtool_get_sset_info(dev, useraddr);
2604                 break;
2605         case ETHTOOL_GRXFHINDIR:
2606                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2607                 break;
2608         case ETHTOOL_SRXFHINDIR:
2609                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2610                 break;
2611         case ETHTOOL_GRSSH:
2612                 rc = ethtool_get_rxfh(dev, useraddr);
2613                 break;
2614         case ETHTOOL_SRSSH:
2615                 rc = ethtool_set_rxfh(dev, useraddr);
2616                 break;
2617         case ETHTOOL_GFEATURES:
2618                 rc = ethtool_get_features(dev, useraddr);
2619                 break;
2620         case ETHTOOL_SFEATURES:
2621                 rc = ethtool_set_features(dev, useraddr);
2622                 break;
2623         case ETHTOOL_GTXCSUM:
2624         case ETHTOOL_GRXCSUM:
2625         case ETHTOOL_GSG:
2626         case ETHTOOL_GTSO:
2627         case ETHTOOL_GUFO:
2628         case ETHTOOL_GGSO:
2629         case ETHTOOL_GGRO:
2630                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2631                 break;
2632         case ETHTOOL_STXCSUM:
2633         case ETHTOOL_SRXCSUM:
2634         case ETHTOOL_SSG:
2635         case ETHTOOL_STSO:
2636         case ETHTOOL_SUFO:
2637         case ETHTOOL_SGSO:
2638         case ETHTOOL_SGRO:
2639                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2640                 break;
2641         case ETHTOOL_GCHANNELS:
2642                 rc = ethtool_get_channels(dev, useraddr);
2643                 break;
2644         case ETHTOOL_SCHANNELS:
2645                 rc = ethtool_set_channels(dev, useraddr);
2646                 break;
2647         case ETHTOOL_SET_DUMP:
2648                 rc = ethtool_set_dump(dev, useraddr);
2649                 break;
2650         case ETHTOOL_GET_DUMP_FLAG:
2651                 rc = ethtool_get_dump_flag(dev, useraddr);
2652                 break;
2653         case ETHTOOL_GET_DUMP_DATA:
2654                 rc = ethtool_get_dump_data(dev, useraddr);
2655                 break;
2656         case ETHTOOL_GET_TS_INFO:
2657                 rc = ethtool_get_ts_info(dev, useraddr);
2658                 break;
2659         case ETHTOOL_GMODULEINFO:
2660                 rc = ethtool_get_module_info(dev, useraddr);
2661                 break;
2662         case ETHTOOL_GMODULEEEPROM:
2663                 rc = ethtool_get_module_eeprom(dev, useraddr);
2664                 break;
2665         case ETHTOOL_GTUNABLE:
2666                 rc = ethtool_get_tunable(dev, useraddr);
2667                 break;
2668         case ETHTOOL_STUNABLE:
2669                 rc = ethtool_set_tunable(dev, useraddr);
2670                 break;
2671         case ETHTOOL_GPHYSTATS:
2672                 rc = ethtool_get_phy_stats(dev, useraddr);
2673                 break;
2674         case ETHTOOL_PERQUEUE:
2675                 rc = ethtool_set_per_queue(dev, useraddr);
2676                 break;
2677         case ETHTOOL_GLINKSETTINGS:
2678                 rc = ethtool_get_link_ksettings(dev, useraddr);
2679                 break;
2680         case ETHTOOL_SLINKSETTINGS:
2681                 rc = ethtool_set_link_ksettings(dev, useraddr);
2682                 break;
2683         default:
2684                 rc = -EOPNOTSUPP;
2685         }
2686
2687         if (dev->ethtool_ops->complete)
2688                 dev->ethtool_ops->complete(dev);
2689
2690         if (old_features != dev->features)
2691                 netdev_features_change(dev);
2692
2693         return rc;
2694 }