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/signal.h>
  28 #include <linux/net.h>
  29
  30 /*
  31  * Some useful ethtool_ops methods that're device independent.
  32  * If we find that all drivers want to do the same thing here,
  33  * we can turn these into dev_() function calls.
  34  */
  35
  36 u32 ethtool_op_get_link(struct net_device *dev)
  37 {
  38         return netif_carrier_ok(dev) ? 1 : 0;
  39 }
  40 EXPORT_SYMBOL(ethtool_op_get_link);
  41
  42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  43 {
  44         info->so_timestamping =
  45                 SOF_TIMESTAMPING_TX_SOFTWARE |
  46                 SOF_TIMESTAMPING_RX_SOFTWARE |
  47                 SOF_TIMESTAMPING_SOFTWARE;
  48         info->phc_index = -1;
  49         return 0;
  50 }
  51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  52
  53 /* Handlers for each ethtool command */
  54
  55 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
  56
  57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
  58         [NETIF_F_SG_BIT] =               "tx-scatter-gather",
  59         [NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
  60         [NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
  61         [NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
  62         [NETIF_F_HIGHDMA_BIT] =          "highdma",
  63         [NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
  64         [NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
  65
  66         [NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
  67         [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
  68         [NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
  69         [NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
  70         [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
  71         [NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
  72         [NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
  73         [NETIF_F_LLTX_BIT] =             "tx-lockless",
  74         [NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
  75         [NETIF_F_GRO_BIT] =              "rx-gro",
  76         [NETIF_F_LRO_BIT] =              "rx-lro",
  77
  78         [NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
  79         [NETIF_F_UFO_BIT] =              "tx-udp-fragmentation",
  80         [NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
  81         [NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
  82         [NETIF_F_TSO_MANGLEID_BIT] =     "tx-tcp-mangleid-segmentation",
  83         [NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
  84         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
  85         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
  86         [NETIF_F_GSO_GRE_CSUM_BIT] =     "tx-gre-csum-segmentation",
  87         [NETIF_F_GSO_IPXIP4_BIT] =       "tx-ipxip4-segmentation",
  88         [NETIF_F_GSO_IPXIP6_BIT] =       "tx-ipxip6-segmentation",
  89         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
  90         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
  91         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
  92         [NETIF_F_GSO_SCTP_BIT] =         "tx-sctp-segmentation",
  93
  94         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
  95         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
  96         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
  97         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
  98         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
  99         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
 100         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
 101         [NETIF_F_LOOPBACK_BIT] =         "loopback",
 102         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
 103         [NETIF_F_RXALL_BIT] =            "rx-all",
 104         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
 105         [NETIF_F_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 const char
 122 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 123         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 124         [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
 125 };
 126
 127 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 128 {
 129         struct ethtool_gfeatures cmd = {
 130                 .cmd = ETHTOOL_GFEATURES,
 131                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 132         };
 133         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 134         u32 __user *sizeaddr;
 135         u32 copy_size;
 136         int i;
 137
 138         /* in case feature bits run out again */
 139         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
 140
 141         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 142                 features[i].available = (u32)(dev->hw_features >> (32 * i));
 143                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 144                 features[i].active = (u32)(dev->features >> (32 * i));
 145                 features[i].never_changed =
 146                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 147         }
 148
 149         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 150         if (get_user(copy_size, sizeaddr))
 151                 return -EFAULT;
 152
 153         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 154                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 155
 156         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 157                 return -EFAULT;
 158         useraddr += sizeof(cmd);
 159         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 160                 return -EFAULT;
 161
 162         return 0;
 163 }
 164
 165 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 166 {
 167         struct ethtool_sfeatures cmd;
 168         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 169         netdev_features_t wanted = 0, valid = 0;
 170         int i, ret = 0;
 171
 172         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 173                 return -EFAULT;
 174         useraddr += sizeof(cmd);
 175
 176         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 177                 return -EINVAL;
 178
 179         if (copy_from_user(features, useraddr, sizeof(features)))
 180                 return -EFAULT;
 181
 182         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 183                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 184                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 185         }
 186
 187         if (valid & ~NETIF_F_ETHTOOL_BITS)
 188                 return -EINVAL;
 189
 190         if (valid & ~dev->hw_features) {
 191                 valid &= dev->hw_features;
 192                 ret |= ETHTOOL_F_UNSUPPORTED;
 193         }
 194
 195         dev->wanted_features &= ~valid;
 196         dev->wanted_features |= wanted & valid;
 197         __netdev_update_features(dev);
 198
 199         if ((dev->wanted_features ^ dev->features) & valid)
 200                 ret |= ETHTOOL_F_WISH;
 201
 202         return ret;
 203 }
 204
 205 static int phy_get_sset_count(struct phy_device *phydev)
 206 {
 207         int ret;
 208
 209         if (phydev->drv->get_sset_count &&
 210             phydev->drv->get_strings &&
 211             phydev->drv->get_stats) {
 212                 mutex_lock(&phydev->lock);
 213                 ret = phydev->drv->get_sset_count(phydev);
 214                 mutex_unlock(&phydev->lock);
 215
 216                 return ret;
 217         }
 218
 219         return -EOPNOTSUPP;
 220 }
 221
 222 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 223 {
 224         const struct ethtool_ops *ops = dev->ethtool_ops;
 225
 226         if (sset == ETH_SS_FEATURES)
 227                 return ARRAY_SIZE(netdev_features_strings);
 228
 229         if (sset == ETH_SS_RSS_HASH_FUNCS)
 230                 return ARRAY_SIZE(rss_hash_func_strings);
 231
 232         if (sset == ETH_SS_TUNABLES)
 233                 return ARRAY_SIZE(tunable_strings);
 234
 235         if (sset == ETH_SS_PHY_TUNABLES)
 236                 return ARRAY_SIZE(phy_tunable_strings);
 237
 238         if (sset == ETH_SS_PHY_STATS) {
 239                 if (dev->phydev)
 240                         return phy_get_sset_count(dev->phydev);
 241                 else
 242                         return -EOPNOTSUPP;
 243         }
 244
 245         if (ops->get_sset_count && ops->get_strings)
 246                 return ops->get_sset_count(dev, sset);
 247         else
 248                 return -EOPNOTSUPP;
 249 }
 250
 251 static void __ethtool_get_strings(struct net_device *dev,
 252         u32 stringset, u8 *data)
 253 {
 254         const struct ethtool_ops *ops = dev->ethtool_ops;
 255
 256         if (stringset == ETH_SS_FEATURES)
 257                 memcpy(data, netdev_features_strings,
 258                         sizeof(netdev_features_strings));
 259         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 260                 memcpy(data, rss_hash_func_strings,
 261                        sizeof(rss_hash_func_strings));
 262         else if (stringset == ETH_SS_TUNABLES)
 263                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 264         else if (stringset == ETH_SS_PHY_TUNABLES)
 265                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 266         else if (stringset == ETH_SS_PHY_STATS) {
 267                 struct phy_device *phydev = dev->phydev;
 268
 269                 if (phydev) {
 270                         mutex_lock(&phydev->lock);
 271                         phydev->drv->get_strings(phydev, data);
 272                         mutex_unlock(&phydev->lock);
 273                 } else {
 274                         return;
 275                 }
 276         } else
 277                 /* ops->get_strings is valid because checked earlier */
 278                 ops->get_strings(dev, stringset, data);
 279 }
 280
 281 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 282 {
 283         /* feature masks of legacy discrete ethtool ops */
 284
 285         switch (eth_cmd) {
 286         case ETHTOOL_GTXCSUM:
 287         case ETHTOOL_STXCSUM:
 288                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 289         case ETHTOOL_GRXCSUM:
 290         case ETHTOOL_SRXCSUM:
 291                 return NETIF_F_RXCSUM;
 292         case ETHTOOL_GSG:
 293         case ETHTOOL_SSG:
 294                 return NETIF_F_SG;
 295         case ETHTOOL_GTSO:
 296         case ETHTOOL_STSO:
 297                 return NETIF_F_ALL_TSO;
 298         case ETHTOOL_GUFO:
 299         case ETHTOOL_SUFO:
 300                 return NETIF_F_UFO;
 301         case ETHTOOL_GGSO:
 302         case ETHTOOL_SGSO:
 303                 return NETIF_F_GSO;
 304         case ETHTOOL_GGRO:
 305         case ETHTOOL_SGRO:
 306                 return NETIF_F_GRO;
 307         default:
 308                 BUG();
 309         }
 310 }
 311
 312 static int ethtool_get_one_feature(struct net_device *dev,
 313         char __user *useraddr, u32 ethcmd)
 314 {
 315         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 316         struct ethtool_value edata = {
 317                 .cmd = ethcmd,
 318                 .data = !!(dev->features & mask),
 319         };
 320
 321         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 322                 return -EFAULT;
 323         return 0;
 324 }
 325
 326 static int ethtool_set_one_feature(struct net_device *dev,
 327         void __user *useraddr, u32 ethcmd)
 328 {
 329         struct ethtool_value edata;
 330         netdev_features_t mask;
 331
 332         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 333                 return -EFAULT;
 334
 335         mask = ethtool_get_feature_mask(ethcmd);
 336         mask &= dev->hw_features;
 337         if (!mask)
 338                 return -EOPNOTSUPP;
 339
 340         if (edata.data)
 341                 dev->wanted_features |= mask;
 342         else
 343                 dev->wanted_features &= ~mask;
 344
 345         __netdev_update_features(dev);
 346
 347         return 0;
 348 }
 349
 350 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 351                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 352 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 353                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 354                           NETIF_F_RXHASH)
 355
 356 static u32 __ethtool_get_flags(struct net_device *dev)
 357 {
 358         u32 flags = 0;
 359
 360         if (dev->features & NETIF_F_LRO)
 361                 flags |= ETH_FLAG_LRO;
 362         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 363                 flags |= ETH_FLAG_RXVLAN;
 364         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 365                 flags |= ETH_FLAG_TXVLAN;
 366         if (dev->features & NETIF_F_NTUPLE)
 367                 flags |= ETH_FLAG_NTUPLE;
 368         if (dev->features & NETIF_F_RXHASH)
 369                 flags |= ETH_FLAG_RXHASH;
 370
 371         return flags;
 372 }
 373
 374 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 375 {
 376         netdev_features_t features = 0, changed;
 377
 378         if (data & ~ETH_ALL_FLAGS)
 379                 return -EINVAL;
 380
 381         if (data & ETH_FLAG_LRO)
 382                 features |= NETIF_F_LRO;
 383         if (data & ETH_FLAG_RXVLAN)
 384                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 385         if (data & ETH_FLAG_TXVLAN)
 386                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 387         if (data & ETH_FLAG_NTUPLE)
 388                 features |= NETIF_F_NTUPLE;
 389         if (data & ETH_FLAG_RXHASH)
 390                 features |= NETIF_F_RXHASH;
 391
 392         /* allow changing only bits set in hw_features */
 393         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 394         if (changed & ~dev->hw_features)
 395                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 396
 397         dev->wanted_features =
 398                 (dev->wanted_features & ~changed) | (features & changed);
 399
 400         __netdev_update_features(dev);
 401
 402         return 0;
 403 }
 404
 405 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 406                                              u32 legacy_u32)
 407 {
 408         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 409         dst[0] = legacy_u32;
 410 }
 411 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 412
 413 /* return false if src had higher bits set. lower bits always updated. */
 414 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 415                                              const unsigned long *src)
 416 {
 417         bool retval = true;
 418
 419         /* TODO: following test will soon always be true */
 420         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 421                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 422
 423                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 424                 bitmap_fill(ext, 32);
 425                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 426                 if (bitmap_intersects(ext, src,
 427                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 428                         /* src mask goes beyond bit 31 */
 429                         retval = false;
 430                 }
 431         }
 432         *legacy_u32 = src[0];
 433         return retval;
 434 }
 435 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 436
 437 /* return false if legacy contained non-0 deprecated fields
 438  * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
 439  */
 440 static bool
 441 convert_legacy_settings_to_link_ksettings(
 442         struct ethtool_link_ksettings *link_ksettings,
 443         const struct ethtool_cmd *legacy_settings)
 444 {
 445         bool retval = true;
 446
 447         memset(link_ksettings, 0, sizeof(*link_ksettings));
 448
 449         /* This is used to tell users that driver is still using these
 450          * deprecated legacy fields, and they should not use
 451          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
 452          */
 453         if (legacy_settings->transceiver ||
 454             legacy_settings->maxtxpkt ||
 455             legacy_settings->maxrxpkt)
 456                 retval = false;
 457
 458         ethtool_convert_legacy_u32_to_link_mode(
 459                 link_ksettings->link_modes.supported,
 460                 legacy_settings->supported);
 461         ethtool_convert_legacy_u32_to_link_mode(
 462                 link_ksettings->link_modes.advertising,
 463                 legacy_settings->advertising);
 464         ethtool_convert_legacy_u32_to_link_mode(
 465                 link_ksettings->link_modes.lp_advertising,
 466                 legacy_settings->lp_advertising);
 467         link_ksettings->base.speed
 468                 = ethtool_cmd_speed(legacy_settings);
 469         link_ksettings->base.duplex
 470                 = legacy_settings->duplex;
 471         link_ksettings->base.port
 472                 = legacy_settings->port;
 473         link_ksettings->base.phy_address
 474                 = legacy_settings->phy_address;
 475         link_ksettings->base.autoneg
 476                 = legacy_settings->autoneg;
 477         link_ksettings->base.mdio_support
 478                 = legacy_settings->mdio_support;
 479         link_ksettings->base.eth_tp_mdix
 480                 = legacy_settings->eth_tp_mdix;
 481         link_ksettings->base.eth_tp_mdix_ctrl
 482                 = legacy_settings->eth_tp_mdix_ctrl;
 483         return retval;
 484 }
 485
 486 /* return false if ksettings link modes had higher bits
 487  * set. legacy_settings always updated (best effort)
 488  */
 489 static bool
 490 convert_link_ksettings_to_legacy_settings(
 491         struct ethtool_cmd *legacy_settings,
 492         const struct ethtool_link_ksettings *link_ksettings)
 493 {
 494         bool retval = true;
 495
 496         memset(legacy_settings, 0, sizeof(*legacy_settings));
 497         /* this also clears the deprecated fields in legacy structure:
 498          * __u8         transceiver;
 499          * __u32        maxtxpkt;
 500          * __u32        maxrxpkt;
 501          */
 502
 503         retval &= ethtool_convert_link_mode_to_legacy_u32(
 504                 &legacy_settings->supported,
 505                 link_ksettings->link_modes.supported);
 506         retval &= ethtool_convert_link_mode_to_legacy_u32(
 507                 &legacy_settings->advertising,
 508                 link_ksettings->link_modes.advertising);
 509         retval &= ethtool_convert_link_mode_to_legacy_u32(
 510                 &legacy_settings->lp_advertising,
 511                 link_ksettings->link_modes.lp_advertising);
 512         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 513         legacy_settings->duplex
 514                 = link_ksettings->base.duplex;
 515         legacy_settings->port
 516                 = link_ksettings->base.port;
 517         legacy_settings->phy_address
 518                 = link_ksettings->base.phy_address;
 519         legacy_settings->autoneg
 520                 = link_ksettings->base.autoneg;
 521         legacy_settings->mdio_support
 522                 = link_ksettings->base.mdio_support;
 523         legacy_settings->eth_tp_mdix
 524                 = link_ksettings->base.eth_tp_mdix;
 525         legacy_settings->eth_tp_mdix_ctrl
 526                 = link_ksettings->base.eth_tp_mdix_ctrl;
 527         return retval;
 528 }
 529
 530 /* number of 32-bit words to store the user's link mode bitmaps */
 531 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 532         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 533
 534 /* layout of the struct passed from/to userland */
 535 struct ethtool_link_usettings {
 536         struct ethtool_link_settings base;
 537         struct {
 538                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 539                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 540                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 541         } link_modes;
 542 };
 543
 544 /* Internal kernel helper to query a device ethtool_link_settings.
 545  *
 546  * Backward compatibility note: for compatibility with legacy drivers
 547  * that implement only the ethtool_cmd API, this has to work with both
 548  * drivers implementing get_link_ksettings API and drivers
 549  * implementing get_settings API. When drivers implement get_settings
 550  * and report ethtool_cmd deprecated fields
 551  * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
 552  * because the resulting struct ethtool_link_settings does not report them.
 553  */
 554 int __ethtool_get_link_ksettings(struct net_device *dev,
 555                                  struct ethtool_link_ksettings *link_ksettings)
 556 {
 557         int err;
 558         struct ethtool_cmd cmd;
 559
 560         ASSERT_RTNL();
 561
 562         if (dev->ethtool_ops->get_link_ksettings) {
 563                 memset(link_ksettings, 0, sizeof(*link_ksettings));
 564                 return dev->ethtool_ops->get_link_ksettings(dev,
 565                                                             link_ksettings);
 566         }
 567
 568         /* driver doesn't support %ethtool_link_ksettings API. revert to
 569          * legacy %ethtool_cmd API, unless it's not supported either.
 570          * TODO: remove when ethtool_ops::get_settings disappears internally
 571          */
 572         if (!dev->ethtool_ops->get_settings)
 573                 return -EOPNOTSUPP;
 574
 575         memset(&cmd, 0, sizeof(cmd));
 576         cmd.cmd = ETHTOOL_GSET;
 577         err = dev->ethtool_ops->get_settings(dev, &cmd);
 578         if (err < 0)
 579                 return err;
 580
 581         /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
 582          */
 583         convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
 584         return err;
 585 }
 586 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 587
 588 /* convert ethtool_link_usettings in user space to a kernel internal
 589  * ethtool_link_ksettings. return 0 on success, errno on error.
 590  */
 591 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 592                                          const void __user *from)
 593 {
 594         struct ethtool_link_usettings link_usettings;
 595
 596         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 597                 return -EFAULT;
 598
 599         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 600         bitmap_from_u32array(to->link_modes.supported,
 601                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 602                              link_usettings.link_modes.supported,
 603                              __ETHTOOL_LINK_MODE_MASK_NU32);
 604         bitmap_from_u32array(to->link_modes.advertising,
 605                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 606                              link_usettings.link_modes.advertising,
 607                              __ETHTOOL_LINK_MODE_MASK_NU32);
 608         bitmap_from_u32array(to->link_modes.lp_advertising,
 609                              __ETHTOOL_LINK_MODE_MASK_NBITS,
 610                              link_usettings.link_modes.lp_advertising,
 611                              __ETHTOOL_LINK_MODE_MASK_NU32);
 612
 613         return 0;
 614 }
 615
 616 /* convert a kernel internal ethtool_link_ksettings to
 617  * ethtool_link_usettings in user space. return 0 on success, errno on
 618  * error.
 619  */
 620 static int
 621 store_link_ksettings_for_user(void __user *to,
 622                               const struct ethtool_link_ksettings *from)
 623 {
 624         struct ethtool_link_usettings link_usettings;
 625
 626         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 627         bitmap_to_u32array(link_usettings.link_modes.supported,
 628                            __ETHTOOL_LINK_MODE_MASK_NU32,
 629                            from->link_modes.supported,
 630                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 631         bitmap_to_u32array(link_usettings.link_modes.advertising,
 632                            __ETHTOOL_LINK_MODE_MASK_NU32,
 633                            from->link_modes.advertising,
 634                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 635         bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
 636                            __ETHTOOL_LINK_MODE_MASK_NU32,
 637                            from->link_modes.lp_advertising,
 638                            __ETHTOOL_LINK_MODE_MASK_NBITS);
 639
 640         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 641                 return -EFAULT;
 642
 643         return 0;
 644 }
 645
 646 /* Query device for its ethtool_link_settings.
 647  *
 648  * Backward compatibility note: this function must fail when driver
 649  * does not implement ethtool::get_link_ksettings, even if legacy
 650  * ethtool_ops::get_settings is implemented. This tells new versions
 651  * of ethtool that they should use the legacy API %ETHTOOL_GSET for
 652  * this driver, so that they can correctly access the ethtool_cmd
 653  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 654  * implements ethtool_ops::get_settings anymore.
 655  */
 656 static int ethtool_get_link_ksettings(struct net_device *dev,
 657                                       void __user *useraddr)
 658 {
 659         int err = 0;
 660         struct ethtool_link_ksettings link_ksettings;
 661
 662         ASSERT_RTNL();
 663
 664         if (!dev->ethtool_ops->get_link_ksettings)
 665                 return -EOPNOTSUPP;
 666
 667         /* handle bitmap nbits handshake */
 668         if (copy_from_user(&link_ksettings.base, useraddr,
 669                            sizeof(link_ksettings.base)))
 670                 return -EFAULT;
 671
 672         if (__ETHTOOL_LINK_MODE_MASK_NU32
 673             != link_ksettings.base.link_mode_masks_nwords) {
 674                 /* wrong link mode nbits requested */
 675                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 676                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 677                 /* send back number of words required as negative val */
 678                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 679                                    "need too many bits for link modes!");
 680                 link_ksettings.base.link_mode_masks_nwords
 681                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 682
 683                 /* copy the base fields back to user, not the link
 684                  * mode bitmaps
 685                  */
 686                 if (copy_to_user(useraddr, &link_ksettings.base,
 687                                  sizeof(link_ksettings.base)))
 688                         return -EFAULT;
 689
 690                 return 0;
 691         }
 692
 693         /* handshake successful: user/kernel agree on
 694          * link_mode_masks_nwords
 695          */
 696
 697         memset(&link_ksettings, 0, sizeof(link_ksettings));
 698         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 699         if (err < 0)
 700                 return err;
 701
 702         /* make sure we tell the right values to user */
 703         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 704         link_ksettings.base.link_mode_masks_nwords
 705                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 706
 707         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 708 }
 709
 710 /* Update device ethtool_link_settings.
 711  *
 712  * Backward compatibility note: this function must fail when driver
 713  * does not implement ethtool::set_link_ksettings, even if legacy
 714  * ethtool_ops::set_settings is implemented. This tells new versions
 715  * of ethtool that they should use the legacy API %ETHTOOL_SSET for
 716  * this driver, so that they can correctly update the ethtool_cmd
 717  * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
 718  * implements ethtool_ops::get_settings anymore.
 719  */
 720 static int ethtool_set_link_ksettings(struct net_device *dev,
 721                                       void __user *useraddr)
 722 {
 723         int err;
 724         struct ethtool_link_ksettings link_ksettings;
 725
 726         ASSERT_RTNL();
 727
 728         if (!dev->ethtool_ops->set_link_ksettings)
 729                 return -EOPNOTSUPP;
 730
 731         /* make sure nbits field has expected value */
 732         if (copy_from_user(&link_ksettings.base, useraddr,
 733                            sizeof(link_ksettings.base)))
 734                 return -EFAULT;
 735
 736         if (__ETHTOOL_LINK_MODE_MASK_NU32
 737             != link_ksettings.base.link_mode_masks_nwords)
 738                 return -EINVAL;
 739
 740         /* copy the whole structure, now that we know it has expected
 741          * format
 742          */
 743         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 744         if (err)
 745                 return err;
 746
 747         /* re-check nwords field, just in case */
 748         if (__ETHTOOL_LINK_MODE_MASK_NU32
 749             != link_ksettings.base.link_mode_masks_nwords)
 750                 return -EINVAL;
 751
 752         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 753 }
 754
 755 static void
 756 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
 757 {
 758         char name[sizeof(current->comm)];
 759
 760         pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
 761                      get_task_comm(name, current), details);
 762 }
 763
 764 /* Query device for its ethtool_cmd settings.
 765  *
 766  * Backward compatibility note: for compatibility with legacy ethtool,
 767  * this has to work with both drivers implementing get_link_ksettings
 768  * API and drivers implementing get_settings API. When drivers
 769  * implement get_link_ksettings and report higher link mode bits, a
 770  * kernel warning is logged once (with name of 1st driver/device) to
 771  * recommend user to upgrade ethtool, but the command is successful
 772  * (only the lower link mode bits reported back to user).
 773  */
 774 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 775 {
 776         struct ethtool_cmd cmd;
 777
 778         ASSERT_RTNL();
 779
 780         if (dev->ethtool_ops->get_link_ksettings) {
 781                 /* First, use link_ksettings API if it is supported */
 782                 int err;
 783                 struct ethtool_link_ksettings link_ksettings;
 784
 785                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 786                 err = dev->ethtool_ops->get_link_ksettings(dev,
 787                                                            &link_ksettings);
 788                 if (err < 0)
 789                         return err;
 790                 if (!convert_link_ksettings_to_legacy_settings(&cmd,
 791                                                                &link_ksettings))
 792                         warn_incomplete_ethtool_legacy_settings_conversion(
 793                                 "link modes are only partially reported");
 794
 795                 /* send a sensible cmd tag back to user */
 796                 cmd.cmd = ETHTOOL_GSET;
 797         } else {
 798                 /* driver doesn't support %ethtool_link_ksettings
 799                  * API. revert to legacy %ethtool_cmd API, unless it's
 800                  * not supported either.
 801                  */
 802                 int err;
 803
 804                 if (!dev->ethtool_ops->get_settings)
 805                         return -EOPNOTSUPP;
 806
 807                 memset(&cmd, 0, sizeof(cmd));
 808                 cmd.cmd = ETHTOOL_GSET;
 809                 err = dev->ethtool_ops->get_settings(dev, &cmd);
 810                 if (err < 0)
 811                         return err;
 812         }
 813
 814         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 815                 return -EFAULT;
 816
 817         return 0;
 818 }
 819
 820 /* Update device link settings with given ethtool_cmd.
 821  *
 822  * Backward compatibility note: for compatibility with legacy ethtool,
 823  * this has to work with both drivers implementing set_link_ksettings
 824  * API and drivers implementing set_settings API. When drivers
 825  * implement set_link_ksettings and user's request updates deprecated
 826  * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 827  * warning is logged once (with name of 1st driver/device) to
 828  * recommend user to upgrade ethtool, and the request is rejected.
 829  */
 830 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 831 {
 832         struct ethtool_cmd cmd;
 833
 834         ASSERT_RTNL();
 835
 836         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 837                 return -EFAULT;
 838
 839         /* first, try new %ethtool_link_ksettings API. */
 840         if (dev->ethtool_ops->set_link_ksettings) {
 841                 struct ethtool_link_ksettings link_ksettings;
 842
 843                 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
 844                                                                &cmd))
 845                         return -EINVAL;
 846
 847                 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
 848                 link_ksettings.base.link_mode_masks_nwords
 849                         = __ETHTOOL_LINK_MODE_MASK_NU32;
 850                 return dev->ethtool_ops->set_link_ksettings(dev,
 851                                                             &link_ksettings);
 852         }
 853
 854         /* legacy %ethtool_cmd API */
 855
 856         /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
 857          * disappears internally
 858          */
 859
 860         if (!dev->ethtool_ops->set_settings)
 861                 return -EOPNOTSUPP;
 862
 863         return dev->ethtool_ops->set_settings(dev, &cmd);
 864 }
 865
 866 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 867                                                   void __user *useraddr)
 868 {
 869         struct ethtool_drvinfo info;
 870         const struct ethtool_ops *ops = dev->ethtool_ops;
 871
 872         memset(&info, 0, sizeof(info));
 873         info.cmd = ETHTOOL_GDRVINFO;
 874         if (ops->get_drvinfo) {
 875                 ops->get_drvinfo(dev, &info);
 876         } else if (dev->dev.parent && dev->dev.parent->driver) {
 877                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 878                         sizeof(info.bus_info));
 879                 strlcpy(info.driver, dev->dev.parent->driver->name,
 880                         sizeof(info.driver));
 881         } else {
 882                 return -EOPNOTSUPP;
 883         }
 884
 885         /*
 886          * this method of obtaining string set info is deprecated;
 887          * Use ETHTOOL_GSSET_INFO instead.
 888          */
 889         if (ops->get_sset_count) {
 890                 int rc;
 891
 892                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 893                 if (rc >= 0)
 894                         info.testinfo_len = rc;
 895                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 896                 if (rc >= 0)
 897                         info.n_stats = rc;
 898                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 899                 if (rc >= 0)
 900                         info.n_priv_flags = rc;
 901         }
 902         if (ops->get_regs_len)
 903                 info.regdump_len = ops->get_regs_len(dev);
 904         if (ops->get_eeprom_len)
 905                 info.eedump_len = ops->get_eeprom_len(dev);
 906
 907         if (copy_to_user(useraddr, &info, sizeof(info)))
 908                 return -EFAULT;
 909         return 0;
 910 }
 911
 912 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 913                                                     void __user *useraddr)
 914 {
 915         struct ethtool_sset_info info;
 916         u64 sset_mask;
 917         int i, idx = 0, n_bits = 0, ret, rc;
 918         u32 *info_buf = NULL;
 919
 920         if (copy_from_user(&info, useraddr, sizeof(info)))
 921                 return -EFAULT;
 922
 923         /* store copy of mask, because we zero struct later on */
 924         sset_mask = info.sset_mask;
 925         if (!sset_mask)
 926                 return 0;
 927
 928         /* calculate size of return buffer */
 929         n_bits = hweight64(sset_mask);
 930
 931         memset(&info, 0, sizeof(info));
 932         info.cmd = ETHTOOL_GSSET_INFO;
 933
 934         info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
 935         if (!info_buf)
 936                 return -ENOMEM;
 937
 938         /*
 939          * fill return buffer based on input bitmask and successful
 940          * get_sset_count return
 941          */
 942         for (i = 0; i < 64; i++) {
 943                 if (!(sset_mask & (1ULL << i)))
 944                         continue;
 945
 946                 rc = __ethtool_get_sset_count(dev, i);
 947                 if (rc >= 0) {
 948                         info.sset_mask |= (1ULL << i);
 949                         info_buf[idx++] = rc;
 950                 }
 951         }
 952
 953         ret = -EFAULT;
 954         if (copy_to_user(useraddr, &info, sizeof(info)))
 955                 goto out;
 956
 957         useraddr += offsetof(struct ethtool_sset_info, data);
 958         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 959                 goto out;
 960
 961         ret = 0;
 962
 963 out:
 964         kfree(info_buf);
 965         return ret;
 966 }
 967
 968 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 969                                                 u32 cmd, void __user *useraddr)
 970 {
 971         struct ethtool_rxnfc info;
 972         size_t info_size = sizeof(info);
 973         int rc;
 974
 975         if (!dev->ethtool_ops->set_rxnfc)
 976                 return -EOPNOTSUPP;
 977
 978         /* struct ethtool_rxnfc was originally defined for
 979          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 980          * members.  User-space might still be using that
 981          * definition. */
 982         if (cmd == ETHTOOL_SRXFH)
 983                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 984                              sizeof(info.data));
 985
 986         if (copy_from_user(&info, useraddr, info_size))
 987                 return -EFAULT;
 988
 989         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 990         if (rc)
 991                 return rc;
 992
 993         if (cmd == ETHTOOL_SRXCLSRLINS &&
 994             copy_to_user(useraddr, &info, info_size))
 995                 return -EFAULT;
 996
 997         return 0;
 998 }
 999
1000 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1001                                                 u32 cmd, void __user *useraddr)
1002 {
1003         struct ethtool_rxnfc info;
1004         size_t info_size = sizeof(info);
1005         const struct ethtool_ops *ops = dev->ethtool_ops;
1006         int ret;
1007         void *rule_buf = NULL;
1008
1009         if (!ops->get_rxnfc)
1010                 return -EOPNOTSUPP;
1011
1012         /* struct ethtool_rxnfc was originally defined for
1013          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1014          * members.  User-space might still be using that
1015          * definition. */
1016         if (cmd == ETHTOOL_GRXFH)
1017                 info_size = (offsetof(struct ethtool_rxnfc, data) +
1018                              sizeof(info.data));
1019
1020         if (copy_from_user(&info, useraddr, info_size))
1021                 return -EFAULT;
1022
1023         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1024                 if (info.rule_cnt > 0) {
1025                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1026                                 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1027                                                    GFP_USER);
1028                         if (!rule_buf)
1029                                 return -ENOMEM;
1030                 }
1031         }
1032
1033         ret = ops->get_rxnfc(dev, &info, rule_buf);
1034         if (ret < 0)
1035                 goto err_out;
1036
1037         ret = -EFAULT;
1038         if (copy_to_user(useraddr, &info, info_size))
1039                 goto err_out;
1040
1041         if (rule_buf) {
1042                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1043                 if (copy_to_user(useraddr, rule_buf,
1044                                  info.rule_cnt * sizeof(u32)))
1045                         goto err_out;
1046         }
1047         ret = 0;
1048
1049 err_out:
1050         kfree(rule_buf);
1051
1052         return ret;
1053 }
1054
1055 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1056                                         struct ethtool_rxnfc *rx_rings,
1057                                         u32 size)
1058 {
1059         int i;
1060
1061         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1062                 return -EFAULT;
1063
1064         /* Validate ring indices */
1065         for (i = 0; i < size; i++)
1066                 if (indir[i] >= rx_rings->data)
1067                         return -EINVAL;
1068
1069         return 0;
1070 }
1071
1072 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1073
1074 void netdev_rss_key_fill(void *buffer, size_t len)
1075 {
1076         BUG_ON(len > sizeof(netdev_rss_key));
1077         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1078         memcpy(buffer, netdev_rss_key, len);
1079 }
1080 EXPORT_SYMBOL(netdev_rss_key_fill);
1081
1082 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1083 {
1084         u32 dev_size, current_max = 0;
1085         u32 *indir;
1086         int ret;
1087
1088         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1089             !dev->ethtool_ops->get_rxfh)
1090                 return -EOPNOTSUPP;
1091         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1092         if (dev_size == 0)
1093                 return -EOPNOTSUPP;
1094
1095         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1096         if (!indir)
1097                 return -ENOMEM;
1098
1099         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1100         if (ret)
1101                 goto out;
1102
1103         while (dev_size--)
1104                 current_max = max(current_max, indir[dev_size]);
1105
1106         *max = current_max;
1107
1108 out:
1109         kfree(indir);
1110         return ret;
1111 }
1112
1113 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1114                                                      void __user *useraddr)
1115 {
1116         u32 user_size, dev_size;
1117         u32 *indir;
1118         int ret;
1119
1120         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1121             !dev->ethtool_ops->get_rxfh)
1122                 return -EOPNOTSUPP;
1123         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1124         if (dev_size == 0)
1125                 return -EOPNOTSUPP;
1126
1127         if (copy_from_user(&user_size,
1128                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1129                            sizeof(user_size)))
1130                 return -EFAULT;
1131
1132         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1133                          &dev_size, sizeof(dev_size)))
1134                 return -EFAULT;
1135
1136         /* If the user buffer size is 0, this is just a query for the
1137          * device table size.  Otherwise, if it's smaller than the
1138          * device table size it's an error.
1139          */
1140         if (user_size < dev_size)
1141                 return user_size == 0 ? 0 : -EINVAL;
1142
1143         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1144         if (!indir)
1145                 return -ENOMEM;
1146
1147         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1148         if (ret)
1149                 goto out;
1150
1151         if (copy_to_user(useraddr +
1152                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1153                          indir, dev_size * sizeof(indir[0])))
1154                 ret = -EFAULT;
1155
1156 out:
1157         kfree(indir);
1158         return ret;
1159 }
1160
1161 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1162                                                      void __user *useraddr)
1163 {
1164         struct ethtool_rxnfc rx_rings;
1165         u32 user_size, dev_size, i;
1166         u32 *indir;
1167         const struct ethtool_ops *ops = dev->ethtool_ops;
1168         int ret;
1169         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1170
1171         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1172             !ops->get_rxnfc)
1173                 return -EOPNOTSUPP;
1174
1175         dev_size = ops->get_rxfh_indir_size(dev);
1176         if (dev_size == 0)
1177                 return -EOPNOTSUPP;
1178
1179         if (copy_from_user(&user_size,
1180                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1181                            sizeof(user_size)))
1182                 return -EFAULT;
1183
1184         if (user_size != 0 && user_size != dev_size)
1185                 return -EINVAL;
1186
1187         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1188         if (!indir)
1189                 return -ENOMEM;
1190
1191         rx_rings.cmd = ETHTOOL_GRXRINGS;
1192         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1193         if (ret)
1194                 goto out;
1195
1196         if (user_size == 0) {
1197                 for (i = 0; i < dev_size; i++)
1198                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1199         } else {
1200                 ret = ethtool_copy_validate_indir(indir,
1201                                                   useraddr + ringidx_offset,
1202                                                   &rx_rings,
1203                                                   dev_size);
1204                 if (ret)
1205                         goto out;
1206         }
1207
1208         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1209         if (ret)
1210                 goto out;
1211
1212         /* indicate whether rxfh was set to default */
1213         if (user_size == 0)
1214                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1215         else
1216                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1217
1218 out:
1219         kfree(indir);
1220         return ret;
1221 }
1222
1223 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1224                                                void __user *useraddr)
1225 {
1226         int ret;
1227         const struct ethtool_ops *ops = dev->ethtool_ops;
1228         u32 user_indir_size, user_key_size;
1229         u32 dev_indir_size = 0, dev_key_size = 0;
1230         struct ethtool_rxfh rxfh;
1231         u32 total_size;
1232         u32 indir_bytes;
1233         u32 *indir = NULL;
1234         u8 dev_hfunc = 0;
1235         u8 *hkey = NULL;
1236         u8 *rss_config;
1237
1238         if (!ops->get_rxfh)
1239                 return -EOPNOTSUPP;
1240
1241         if (ops->get_rxfh_indir_size)
1242                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1243         if (ops->get_rxfh_key_size)
1244                 dev_key_size = ops->get_rxfh_key_size(dev);
1245
1246         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1247                 return -EFAULT;
1248         user_indir_size = rxfh.indir_size;
1249         user_key_size = rxfh.key_size;
1250
1251         /* Check that reserved fields are 0 for now */
1252         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1253             rxfh.rsvd8[2] || rxfh.rsvd32)
1254                 return -EINVAL;
1255
1256         rxfh.indir_size = dev_indir_size;
1257         rxfh.key_size = dev_key_size;
1258         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1259                 return -EFAULT;
1260
1261         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1262             (user_key_size && (user_key_size != dev_key_size)))
1263                 return -EINVAL;
1264
1265         indir_bytes = user_indir_size * sizeof(indir[0]);
1266         total_size = indir_bytes + user_key_size;
1267         rss_config = kzalloc(total_size, GFP_USER);
1268         if (!rss_config)
1269                 return -ENOMEM;
1270
1271         if (user_indir_size)
1272                 indir = (u32 *)rss_config;
1273
1274         if (user_key_size)
1275                 hkey = rss_config + indir_bytes;
1276
1277         ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1278         if (ret)
1279                 goto out;
1280
1281         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1282                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1283                 ret = -EFAULT;
1284         } else if (copy_to_user(useraddr +
1285                               offsetof(struct ethtool_rxfh, rss_config[0]),
1286                               rss_config, total_size)) {
1287                 ret = -EFAULT;
1288         }
1289 out:
1290         kfree(rss_config);
1291
1292         return ret;
1293 }
1294
1295 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1296                                                void __user *useraddr)
1297 {
1298         int ret;
1299         const struct ethtool_ops *ops = dev->ethtool_ops;
1300         struct ethtool_rxnfc rx_rings;
1301         struct ethtool_rxfh rxfh;
1302         u32 dev_indir_size = 0, dev_key_size = 0, i;
1303         u32 *indir = NULL, indir_bytes = 0;
1304         u8 *hkey = NULL;
1305         u8 *rss_config;
1306         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1307
1308         if (!ops->get_rxnfc || !ops->set_rxfh)
1309                 return -EOPNOTSUPP;
1310
1311         if (ops->get_rxfh_indir_size)
1312                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1313         if (ops->get_rxfh_key_size)
1314                 dev_key_size = ops->get_rxfh_key_size(dev);
1315
1316         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1317                 return -EFAULT;
1318
1319         /* Check that reserved fields are 0 for now */
1320         if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1321             rxfh.rsvd8[2] || rxfh.rsvd32)
1322                 return -EINVAL;
1323
1324         /* If either indir, hash key or function is valid, proceed further.
1325          * Must request at least one change: indir size, hash key or function.
1326          */
1327         if ((rxfh.indir_size &&
1328              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1329              rxfh.indir_size != dev_indir_size) ||
1330             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1331             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1332              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1333                 return -EINVAL;
1334
1335         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1336                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1337
1338         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1339         if (!rss_config)
1340                 return -ENOMEM;
1341
1342         rx_rings.cmd = ETHTOOL_GRXRINGS;
1343         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1344         if (ret)
1345                 goto out;
1346
1347         /* rxfh.indir_size == 0 means reset the indir table to default.
1348          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1349          */
1350         if (rxfh.indir_size &&
1351             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1352                 indir = (u32 *)rss_config;
1353                 ret = ethtool_copy_validate_indir(indir,
1354                                                   useraddr + rss_cfg_offset,
1355                                                   &rx_rings,
1356                                                   rxfh.indir_size);
1357                 if (ret)
1358                         goto out;
1359         } else if (rxfh.indir_size == 0) {
1360                 indir = (u32 *)rss_config;
1361                 for (i = 0; i < dev_indir_size; i++)
1362                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1363         }
1364
1365         if (rxfh.key_size) {
1366                 hkey = rss_config + indir_bytes;
1367                 if (copy_from_user(hkey,
1368                                    useraddr + rss_cfg_offset + indir_bytes,
1369                                    rxfh.key_size)) {
1370                         ret = -EFAULT;
1371                         goto out;
1372                 }
1373         }
1374
1375         ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1376         if (ret)
1377                 goto out;
1378
1379         /* indicate whether rxfh was set to default */
1380         if (rxfh.indir_size == 0)
1381                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1382         else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1383                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1384
1385 out:
1386         kfree(rss_config);
1387         return ret;
1388 }
1389
1390 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1391 {
1392         struct ethtool_regs regs;
1393         const struct ethtool_ops *ops = dev->ethtool_ops;
1394         void *regbuf;
1395         int reglen, ret;
1396
1397         if (!ops->get_regs || !ops->get_regs_len)
1398                 return -EOPNOTSUPP;
1399
1400         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1401                 return -EFAULT;
1402
1403         reglen = ops->get_regs_len(dev);
1404         if (regs.len > reglen)
1405                 regs.len = reglen;
1406
1407         regbuf = NULL;
1408         if (reglen) {
1409                 regbuf = vzalloc(reglen);
1410                 if (!regbuf)
1411                         return -ENOMEM;
1412         }
1413
1414         ops->get_regs(dev, &regs, regbuf);
1415
1416         ret = -EFAULT;
1417         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1418                 goto out;
1419         useraddr += offsetof(struct ethtool_regs, data);
1420         if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1421                 goto out;
1422         ret = 0;
1423
1424  out:
1425         vfree(regbuf);
1426         return ret;
1427 }
1428
1429 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1430 {
1431         struct ethtool_value reset;
1432         int ret;
1433
1434         if (!dev->ethtool_ops->reset)
1435                 return -EOPNOTSUPP;
1436
1437         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1438                 return -EFAULT;
1439
1440         ret = dev->ethtool_ops->reset(dev, &reset.data);
1441         if (ret)
1442                 return ret;
1443
1444         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1445                 return -EFAULT;
1446         return 0;
1447 }
1448
1449 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1450 {
1451         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1452
1453         if (!dev->ethtool_ops->get_wol)
1454                 return -EOPNOTSUPP;
1455
1456         dev->ethtool_ops->get_wol(dev, &wol);
1457
1458         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1459                 return -EFAULT;
1460         return 0;
1461 }
1462
1463 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1464 {
1465         struct ethtool_wolinfo wol;
1466
1467         if (!dev->ethtool_ops->set_wol)
1468                 return -EOPNOTSUPP;
1469
1470         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1471                 return -EFAULT;
1472
1473         return dev->ethtool_ops->set_wol(dev, &wol);
1474 }
1475
1476 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1477 {
1478         struct ethtool_eee edata;
1479         int rc;
1480
1481         if (!dev->ethtool_ops->get_eee)
1482                 return -EOPNOTSUPP;
1483
1484         memset(&edata, 0, sizeof(struct ethtool_eee));
1485         edata.cmd = ETHTOOL_GEEE;
1486         rc = dev->ethtool_ops->get_eee(dev, &edata);
1487
1488         if (rc)
1489                 return rc;
1490
1491         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1492                 return -EFAULT;
1493
1494         return 0;
1495 }
1496
1497 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1498 {
1499         struct ethtool_eee edata;
1500
1501         if (!dev->ethtool_ops->set_eee)
1502                 return -EOPNOTSUPP;
1503
1504         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1505                 return -EFAULT;
1506
1507         return dev->ethtool_ops->set_eee(dev, &edata);
1508 }
1509
1510 static int ethtool_nway_reset(struct net_device *dev)
1511 {
1512         if (!dev->ethtool_ops->nway_reset)
1513                 return -EOPNOTSUPP;
1514
1515         return dev->ethtool_ops->nway_reset(dev);
1516 }
1517
1518 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1519 {
1520         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1521
1522         if (!dev->ethtool_ops->get_link)
1523                 return -EOPNOTSUPP;
1524
1525         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1526
1527         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1528                 return -EFAULT;
1529         return 0;
1530 }
1531
1532 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1533                                   int (*getter)(struct net_device *,
1534                                                 struct ethtool_eeprom *, u8 *),
1535                                   u32 total_len)
1536 {
1537         struct ethtool_eeprom eeprom;
1538         void __user *userbuf = useraddr + sizeof(eeprom);
1539         u32 bytes_remaining;
1540         u8 *data;
1541         int ret = 0;
1542
1543         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1544                 return -EFAULT;
1545
1546         /* Check for wrap and zero */
1547         if (eeprom.offset + eeprom.len <= eeprom.offset)
1548                 return -EINVAL;
1549
1550         /* Check for exceeding total eeprom len */
1551         if (eeprom.offset + eeprom.len > total_len)
1552                 return -EINVAL;
1553
1554         data = kmalloc(PAGE_SIZE, GFP_USER);
1555         if (!data)
1556                 return -ENOMEM;
1557
1558         bytes_remaining = eeprom.len;
1559         while (bytes_remaining > 0) {
1560                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1561
1562                 ret = getter(dev, &eeprom, data);
1563                 if (ret)
1564                         break;
1565                 if (copy_to_user(userbuf, data, eeprom.len)) {
1566                         ret = -EFAULT;
1567                         break;
1568                 }
1569                 userbuf += eeprom.len;
1570                 eeprom.offset += eeprom.len;
1571                 bytes_remaining -= eeprom.len;
1572         }
1573
1574         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1575         eeprom.offset -= eeprom.len;
1576         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1577                 ret = -EFAULT;
1578
1579         kfree(data);
1580         return ret;
1581 }
1582
1583 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1584 {
1585         const struct ethtool_ops *ops = dev->ethtool_ops;
1586
1587         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1588             !ops->get_eeprom_len(dev))
1589                 return -EOPNOTSUPP;
1590
1591         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1592                                       ops->get_eeprom_len(dev));
1593 }
1594
1595 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1596 {
1597         struct ethtool_eeprom eeprom;
1598         const struct ethtool_ops *ops = dev->ethtool_ops;
1599         void __user *userbuf = useraddr + sizeof(eeprom);
1600         u32 bytes_remaining;
1601         u8 *data;
1602         int ret = 0;
1603
1604         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1605             !ops->get_eeprom_len(dev))
1606                 return -EOPNOTSUPP;
1607
1608         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1609                 return -EFAULT;
1610
1611         /* Check for wrap and zero */
1612         if (eeprom.offset + eeprom.len <= eeprom.offset)
1613                 return -EINVAL;
1614
1615         /* Check for exceeding total eeprom len */
1616         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1617                 return -EINVAL;
1618
1619         data = kmalloc(PAGE_SIZE, GFP_USER);
1620         if (!data)
1621                 return -ENOMEM;
1622
1623         bytes_remaining = eeprom.len;
1624         while (bytes_remaining > 0) {
1625                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1626
1627                 if (copy_from_user(data, userbuf, eeprom.len)) {
1628                         ret = -EFAULT;
1629                         break;
1630                 }
1631                 ret = ops->set_eeprom(dev, &eeprom, data);
1632                 if (ret)
1633                         break;
1634                 userbuf += eeprom.len;
1635                 eeprom.offset += eeprom.len;
1636                 bytes_remaining -= eeprom.len;
1637         }
1638
1639         kfree(data);
1640         return ret;
1641 }
1642
1643 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1644                                                    void __user *useraddr)
1645 {
1646         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1647
1648         if (!dev->ethtool_ops->get_coalesce)
1649                 return -EOPNOTSUPP;
1650
1651         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1652
1653         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1654                 return -EFAULT;
1655         return 0;
1656 }
1657
1658 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1659                                                    void __user *useraddr)
1660 {
1661         struct ethtool_coalesce coalesce;
1662
1663         if (!dev->ethtool_ops->set_coalesce)
1664                 return -EOPNOTSUPP;
1665
1666         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1667                 return -EFAULT;
1668
1669         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1670 }
1671
1672 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1673 {
1674         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1675
1676         if (!dev->ethtool_ops->get_ringparam)
1677                 return -EOPNOTSUPP;
1678
1679         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1680
1681         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1682                 return -EFAULT;
1683         return 0;
1684 }
1685
1686 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1687 {
1688         struct ethtool_ringparam ringparam;
1689
1690         if (!dev->ethtool_ops->set_ringparam)
1691                 return -EOPNOTSUPP;
1692
1693         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1694                 return -EFAULT;
1695
1696         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1697 }
1698
1699 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1700                                                    void __user *useraddr)
1701 {
1702         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1703
1704         if (!dev->ethtool_ops->get_channels)
1705                 return -EOPNOTSUPP;
1706
1707         dev->ethtool_ops->get_channels(dev, &channels);
1708
1709         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1710                 return -EFAULT;
1711         return 0;
1712 }
1713
1714 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1715                                                    void __user *useraddr)
1716 {
1717         struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1718         u32 max_rx_in_use = 0;
1719
1720         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1721                 return -EOPNOTSUPP;
1722
1723         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1724                 return -EFAULT;
1725
1726         dev->ethtool_ops->get_channels(dev, &max);
1727
1728         /* ensure new counts are within the maximums */
1729         if ((channels.rx_count > max.max_rx) ||
1730             (channels.tx_count > max.max_tx) ||
1731             (channels.combined_count > max.max_combined) ||
1732             (channels.other_count > max.max_other))
1733                 return -EINVAL;
1734
1735         /* ensure the new Rx count fits within the configured Rx flow
1736          * indirection table settings */
1737         if (netif_is_rxfh_configured(dev) &&
1738             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1739             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1740             return -EINVAL;
1741
1742         return dev->ethtool_ops->set_channels(dev, &channels);
1743 }
1744
1745 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1746 {
1747         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1748
1749         if (!dev->ethtool_ops->get_pauseparam)
1750                 return -EOPNOTSUPP;
1751
1752         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1753
1754         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1755                 return -EFAULT;
1756         return 0;
1757 }
1758
1759 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1760 {
1761         struct ethtool_pauseparam pauseparam;
1762
1763         if (!dev->ethtool_ops->set_pauseparam)
1764                 return -EOPNOTSUPP;
1765
1766         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1767                 return -EFAULT;
1768
1769         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1770 }
1771
1772 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1773 {
1774         struct ethtool_test test;
1775         const struct ethtool_ops *ops = dev->ethtool_ops;
1776         u64 *data;
1777         int ret, test_len;
1778
1779         if (!ops->self_test || !ops->get_sset_count)
1780                 return -EOPNOTSUPP;
1781
1782         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1783         if (test_len < 0)
1784                 return test_len;
1785         WARN_ON(test_len == 0);
1786
1787         if (copy_from_user(&test, useraddr, sizeof(test)))
1788                 return -EFAULT;
1789
1790         test.len = test_len;
1791         data = kmalloc(test_len * sizeof(u64), GFP_USER);
1792         if (!data)
1793                 return -ENOMEM;
1794
1795         ops->self_test(dev, &test, data);
1796
1797         ret = -EFAULT;
1798         if (copy_to_user(useraddr, &test, sizeof(test)))
1799                 goto out;
1800         useraddr += sizeof(test);
1801         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1802                 goto out;
1803         ret = 0;
1804
1805  out:
1806         kfree(data);
1807         return ret;
1808 }
1809
1810 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1811 {
1812         struct ethtool_gstrings gstrings;
1813         u8 *data;
1814         int ret;
1815
1816         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1817                 return -EFAULT;
1818
1819         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1820         if (ret < 0)
1821                 return ret;
1822         if (ret > S32_MAX / ETH_GSTRING_LEN)
1823                 return -ENOMEM;
1824         WARN_ON_ONCE(!ret);
1825
1826         gstrings.len = ret;
1827         data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1828         if (gstrings.len && !data)
1829                 return -ENOMEM;
1830
1831         __ethtool_get_strings(dev, gstrings.string_set, data);
1832
1833         ret = -EFAULT;
1834         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1835                 goto out;
1836         useraddr += sizeof(gstrings);
1837         if (gstrings.len &&
1838             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1839                 goto out;
1840         ret = 0;
1841
1842 out:
1843         vfree(data);
1844         return ret;
1845 }
1846
1847 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1848 {
1849         struct ethtool_value id;
1850         static bool busy;
1851         const struct ethtool_ops *ops = dev->ethtool_ops;
1852         int rc;
1853
1854         if (!ops->set_phys_id)
1855                 return -EOPNOTSUPP;
1856
1857         if (busy)
1858                 return -EBUSY;
1859
1860         if (copy_from_user(&id, useraddr, sizeof(id)))
1861                 return -EFAULT;
1862
1863         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1864         if (rc < 0)
1865                 return rc;
1866
1867         /* Drop the RTNL lock while waiting, but prevent reentry or
1868          * removal of the device.
1869          */
1870         busy = true;
1871         dev_hold(dev);
1872         rtnl_unlock();
1873
1874         if (rc == 0) {
1875                 /* Driver will handle this itself */
1876                 schedule_timeout_interruptible(
1877                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1878         } else {
1879                 /* Driver expects to be called at twice the frequency in rc */
1880                 int n = rc * 2, i, interval = HZ / n;
1881
1882                 /* Count down seconds */
1883                 do {
1884                         /* Count down iterations per second */
1885                         i = n;
1886                         do {
1887                                 rtnl_lock();
1888                                 rc = ops->set_phys_id(dev,
1889                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1890                                 rtnl_unlock();
1891                                 if (rc)
1892                                         break;
1893                                 schedule_timeout_interruptible(interval);
1894                         } while (!signal_pending(current) && --i != 0);
1895                 } while (!signal_pending(current) &&
1896                          (id.data == 0 || --id.data != 0));
1897         }
1898
1899         rtnl_lock();
1900         dev_put(dev);
1901         busy = false;
1902
1903         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1904         return rc;
1905 }
1906
1907 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1908 {
1909         struct ethtool_stats stats;
1910         const struct ethtool_ops *ops = dev->ethtool_ops;
1911         u64 *data;
1912         int ret, n_stats;
1913
1914         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1915                 return -EOPNOTSUPP;
1916
1917         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1918         if (n_stats < 0)
1919                 return n_stats;
1920         if (n_stats > S32_MAX / sizeof(u64))
1921                 return -ENOMEM;
1922         WARN_ON_ONCE(!n_stats);
1923         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1924                 return -EFAULT;
1925
1926         stats.n_stats = n_stats;
1927         data = vzalloc(n_stats * sizeof(u64));
1928         if (n_stats && !data)
1929                 return -ENOMEM;
1930
1931         ops->get_ethtool_stats(dev, &stats, data);
1932
1933         ret = -EFAULT;
1934         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1935                 goto out;
1936         useraddr += sizeof(stats);
1937         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1938                 goto out;
1939         ret = 0;
1940
1941  out:
1942         vfree(data);
1943         return ret;
1944 }
1945
1946 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1947 {
1948         struct ethtool_stats stats;
1949         struct phy_device *phydev = dev->phydev;
1950         u64 *data;
1951         int ret, n_stats;
1952
1953         if (!phydev)
1954                 return -EOPNOTSUPP;
1955
1956         n_stats = phy_get_sset_count(phydev);
1957         if (n_stats < 0)
1958                 return n_stats;
1959         if (n_stats > S32_MAX / sizeof(u64))
1960                 return -ENOMEM;
1961         WARN_ON_ONCE(!n_stats);
1962
1963         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1964                 return -EFAULT;
1965
1966         stats.n_stats = n_stats;
1967         data = vzalloc(n_stats * sizeof(u64));
1968         if (n_stats && !data)
1969                 return -ENOMEM;
1970
1971         mutex_lock(&phydev->lock);
1972         phydev->drv->get_stats(phydev, &stats, data);
1973         mutex_unlock(&phydev->lock);
1974
1975         ret = -EFAULT;
1976         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1977                 goto out;
1978         useraddr += sizeof(stats);
1979         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1980                 goto out;
1981         ret = 0;
1982
1983  out:
1984         vfree(data);
1985         return ret;
1986 }
1987
1988 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1989 {
1990         struct ethtool_perm_addr epaddr;
1991
1992         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1993                 return -EFAULT;
1994
1995         if (epaddr.size < dev->addr_len)
1996                 return -ETOOSMALL;
1997         epaddr.size = dev->addr_len;
1998
1999         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2000                 return -EFAULT;
2001         useraddr += sizeof(epaddr);
2002         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2003                 return -EFAULT;
2004         return 0;
2005 }
2006
2007 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2008                              u32 cmd, u32 (*actor)(struct net_device *))
2009 {
2010         struct ethtool_value edata = { .cmd = cmd };
2011
2012         if (!actor)
2013                 return -EOPNOTSUPP;
2014
2015         edata.data = actor(dev);
2016
2017         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2018                 return -EFAULT;
2019         return 0;
2020 }
2021
2022 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2023                              void (*actor)(struct net_device *, u32))
2024 {
2025         struct ethtool_value edata;
2026
2027         if (!actor)
2028                 return -EOPNOTSUPP;
2029
2030         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2031                 return -EFAULT;
2032
2033         actor(dev, edata.data);
2034         return 0;
2035 }
2036
2037 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2038                              int (*actor)(struct net_device *, u32))
2039 {
2040         struct ethtool_value edata;
2041
2042         if (!actor)
2043                 return -EOPNOTSUPP;
2044
2045         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2046                 return -EFAULT;
2047
2048         return actor(dev, edata.data);
2049 }
2050
2051 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2052                                                    char __user *useraddr)
2053 {
2054         struct ethtool_flash efl;
2055
2056         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2057                 return -EFAULT;
2058
2059         if (!dev->ethtool_ops->flash_device)
2060                 return -EOPNOTSUPP;
2061
2062         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2063
2064         return dev->ethtool_ops->flash_device(dev, &efl);
2065 }
2066
2067 static int ethtool_set_dump(struct net_device *dev,
2068                         void __user *useraddr)
2069 {
2070         struct ethtool_dump dump;
2071
2072         if (!dev->ethtool_ops->set_dump)
2073                 return -EOPNOTSUPP;
2074
2075         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2076                 return -EFAULT;
2077
2078         return dev->ethtool_ops->set_dump(dev, &dump);
2079 }
2080
2081 static int ethtool_get_dump_flag(struct net_device *dev,
2082                                 void __user *useraddr)
2083 {
2084         int ret;
2085         struct ethtool_dump dump;
2086         const struct ethtool_ops *ops = dev->ethtool_ops;
2087
2088         if (!ops->get_dump_flag)
2089                 return -EOPNOTSUPP;
2090
2091         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2092                 return -EFAULT;
2093
2094         ret = ops->get_dump_flag(dev, &dump);
2095         if (ret)
2096                 return ret;
2097
2098         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2099                 return -EFAULT;
2100         return 0;
2101 }
2102
2103 static int ethtool_get_dump_data(struct net_device *dev,
2104                                 void __user *useraddr)
2105 {
2106         int ret;
2107         __u32 len;
2108         struct ethtool_dump dump, tmp;
2109         const struct ethtool_ops *ops = dev->ethtool_ops;
2110         void *data = NULL;
2111
2112         if (!ops->get_dump_data || !ops->get_dump_flag)
2113                 return -EOPNOTSUPP;
2114
2115         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2116                 return -EFAULT;
2117
2118         memset(&tmp, 0, sizeof(tmp));
2119         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2120         ret = ops->get_dump_flag(dev, &tmp);
2121         if (ret)
2122                 return ret;
2123
2124         len = min(tmp.len, dump.len);
2125         if (!len)
2126                 return -EFAULT;
2127
2128         /* Don't ever let the driver think there's more space available
2129          * than it requested with .get_dump_flag().
2130          */
2131         dump.len = len;
2132
2133         /* Always allocate enough space to hold the whole thing so that the
2134          * driver does not need to check the length and bother with partial
2135          * dumping.
2136          */
2137         data = vzalloc(tmp.len);
2138         if (!data)
2139                 return -ENOMEM;
2140         ret = ops->get_dump_data(dev, &dump, data);
2141         if (ret)
2142                 goto out;
2143
2144         /* There are two sane possibilities:
2145          * 1. The driver's .get_dump_data() does not touch dump.len.
2146          * 2. Or it may set dump.len to how much it really writes, which
2147          *    should be tmp.len (or len if it can do a partial dump).
2148          * In any case respond to userspace with the actual length of data
2149          * it's receiving.
2150          */
2151         WARN_ON(dump.len != len && dump.len != tmp.len);
2152         dump.len = len;
2153
2154         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2155                 ret = -EFAULT;
2156                 goto out;
2157         }
2158         useraddr += offsetof(struct ethtool_dump, data);
2159         if (copy_to_user(useraddr, data, len))
2160                 ret = -EFAULT;
2161 out:
2162         vfree(data);
2163         return ret;
2164 }
2165
2166 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2167 {
2168         int err = 0;
2169         struct ethtool_ts_info info;
2170         const struct ethtool_ops *ops = dev->ethtool_ops;
2171         struct phy_device *phydev = dev->phydev;
2172
2173         memset(&info, 0, sizeof(info));
2174         info.cmd = ETHTOOL_GET_TS_INFO;
2175
2176         if (phydev && phydev->drv && phydev->drv->ts_info) {
2177                 err = phydev->drv->ts_info(phydev, &info);
2178         } else if (ops->get_ts_info) {
2179                 err = ops->get_ts_info(dev, &info);
2180         } else {
2181                 info.so_timestamping =
2182                         SOF_TIMESTAMPING_RX_SOFTWARE |
2183                         SOF_TIMESTAMPING_SOFTWARE;
2184                 info.phc_index = -1;
2185         }
2186
2187         if (err)
2188                 return err;
2189
2190         if (copy_to_user(useraddr, &info, sizeof(info)))
2191                 err = -EFAULT;
2192
2193         return err;
2194 }
2195
2196 static int __ethtool_get_module_info(struct net_device *dev,
2197                                      struct ethtool_modinfo *modinfo)
2198 {
2199         const struct ethtool_ops *ops = dev->ethtool_ops;
2200         struct phy_device *phydev = dev->phydev;
2201
2202         if (phydev && phydev->drv && phydev->drv->module_info)
2203                 return phydev->drv->module_info(phydev, modinfo);
2204
2205         if (ops->get_module_info)
2206                 return ops->get_module_info(dev, modinfo);
2207
2208         return -EOPNOTSUPP;
2209 }
2210
2211 static int ethtool_get_module_info(struct net_device *dev,
2212                                    void __user *useraddr)
2213 {
2214         int ret;
2215         struct ethtool_modinfo modinfo;
2216
2217         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2218                 return -EFAULT;
2219
2220         ret = __ethtool_get_module_info(dev, &modinfo);
2221         if (ret)
2222                 return ret;
2223
2224         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2225                 return -EFAULT;
2226
2227         return 0;
2228 }
2229
2230 static int __ethtool_get_module_eeprom(struct net_device *dev,
2231                                        struct ethtool_eeprom *ee, u8 *data)
2232 {
2233         const struct ethtool_ops *ops = dev->ethtool_ops;
2234         struct phy_device *phydev = dev->phydev;
2235
2236         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2237                 return phydev->drv->module_eeprom(phydev, ee, data);
2238
2239         if (ops->get_module_eeprom)
2240                 return ops->get_module_eeprom(dev, ee, data);
2241
2242         return -EOPNOTSUPP;
2243 }
2244
2245 static int ethtool_get_module_eeprom(struct net_device *dev,
2246                                      void __user *useraddr)
2247 {
2248         int ret;
2249         struct ethtool_modinfo modinfo;
2250
2251         ret = __ethtool_get_module_info(dev, &modinfo);
2252         if (ret)
2253                 return ret;
2254
2255         return ethtool_get_any_eeprom(dev, useraddr,
2256                                       __ethtool_get_module_eeprom,
2257                                       modinfo.eeprom_len);
2258 }
2259
2260 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2261 {
2262         switch (tuna->id) {
2263         case ETHTOOL_RX_COPYBREAK:
2264         case ETHTOOL_TX_COPYBREAK:
2265                 if (tuna->len != sizeof(u32) ||
2266                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2267                         return -EINVAL;
2268                 break;
2269         default:
2270                 return -EINVAL;
2271         }
2272
2273         return 0;
2274 }
2275
2276 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2277 {
2278         int ret;
2279         struct ethtool_tunable tuna;
2280         const struct ethtool_ops *ops = dev->ethtool_ops;
2281         void *data;
2282
2283         if (!ops->get_tunable)
2284                 return -EOPNOTSUPP;
2285         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2286                 return -EFAULT;
2287         ret = ethtool_tunable_valid(&tuna);
2288         if (ret)
2289                 return ret;
2290         data = kmalloc(tuna.len, GFP_USER);
2291         if (!data)
2292                 return -ENOMEM;
2293         ret = ops->get_tunable(dev, &tuna, data);
2294         if (ret)
2295                 goto out;
2296         useraddr += sizeof(tuna);
2297         ret = -EFAULT;
2298         if (copy_to_user(useraddr, data, tuna.len))
2299                 goto out;
2300         ret = 0;
2301
2302 out:
2303         kfree(data);
2304         return ret;
2305 }
2306
2307 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2308 {
2309         int ret;
2310         struct ethtool_tunable tuna;
2311         const struct ethtool_ops *ops = dev->ethtool_ops;
2312         void *data;
2313
2314         if (!ops->set_tunable)
2315                 return -EOPNOTSUPP;
2316         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2317                 return -EFAULT;
2318         ret = ethtool_tunable_valid(&tuna);
2319         if (ret)
2320                 return ret;
2321         data = kmalloc(tuna.len, GFP_USER);
2322         if (!data)
2323                 return -ENOMEM;
2324         useraddr += sizeof(tuna);
2325         ret = -EFAULT;
2326         if (copy_from_user(data, useraddr, tuna.len))
2327                 goto out;
2328         ret = ops->set_tunable(dev, &tuna, data);
2329
2330 out:
2331         kfree(data);
2332         return ret;
2333 }
2334
2335 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2336                                           void __user *useraddr,
2337                                           struct ethtool_per_queue_op *per_queue_opt)
2338 {
2339         u32 bit;
2340         int ret;
2341         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2342
2343         if (!dev->ethtool_ops->get_per_queue_coalesce)
2344                 return -EOPNOTSUPP;
2345
2346         useraddr += sizeof(*per_queue_opt);
2347
2348         bitmap_from_u32array(queue_mask,
2349                              MAX_NUM_QUEUE,
2350                              per_queue_opt->queue_mask,
2351                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2352
2353         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2354                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2355
2356                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2357                 if (ret != 0)
2358                         return ret;
2359                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2360                         return -EFAULT;
2361                 useraddr += sizeof(coalesce);
2362         }
2363
2364         return 0;
2365 }
2366
2367 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2368                                           void __user *useraddr,
2369                                           struct ethtool_per_queue_op *per_queue_opt)
2370 {
2371         u32 bit;
2372         int i, ret = 0;
2373         int n_queue;
2374         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2375         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2376
2377         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2378             (!dev->ethtool_ops->get_per_queue_coalesce))
2379                 return -EOPNOTSUPP;
2380
2381         useraddr += sizeof(*per_queue_opt);
2382
2383         bitmap_from_u32array(queue_mask,
2384                              MAX_NUM_QUEUE,
2385                              per_queue_opt->queue_mask,
2386                              DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2387         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2388         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2389         if (!backup)
2390                 return -ENOMEM;
2391
2392         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2393                 struct ethtool_coalesce coalesce;
2394
2395                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2396                 if (ret != 0)
2397                         goto roll_back;
2398
2399                 tmp++;
2400
2401                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2402                         ret = -EFAULT;
2403                         goto roll_back;
2404                 }
2405
2406                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2407                 if (ret != 0)
2408                         goto roll_back;
2409
2410                 useraddr += sizeof(coalesce);
2411         }
2412
2413 roll_back:
2414         if (ret != 0) {
2415                 tmp = backup;
2416                 for_each_set_bit(i, queue_mask, bit) {
2417                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2418                         tmp++;
2419                 }
2420         }
2421         kfree(backup);
2422
2423         return ret;
2424 }
2425
2426 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2427 {
2428         struct ethtool_per_queue_op per_queue_opt;
2429
2430         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2431                 return -EFAULT;
2432
2433         switch (per_queue_opt.sub_command) {
2434         case ETHTOOL_GCOALESCE:
2435                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2436         case ETHTOOL_SCOALESCE:
2437                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2438         default:
2439                 return -EOPNOTSUPP;
2440         };
2441 }
2442
2443 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2444 {
2445         switch (tuna->id) {
2446         case ETHTOOL_PHY_DOWNSHIFT:
2447                 if (tuna->len != sizeof(u8) ||
2448                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2449                         return -EINVAL;
2450                 break;
2451         default:
2452                 return -EINVAL;
2453         }
2454
2455         return 0;
2456 }
2457
2458 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2459 {
2460         int ret;
2461         struct ethtool_tunable tuna;
2462         struct phy_device *phydev = dev->phydev;
2463         void *data;
2464
2465         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2466                 return -EOPNOTSUPP;
2467
2468         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2469                 return -EFAULT;
2470         ret = ethtool_phy_tunable_valid(&tuna);
2471         if (ret)
2472                 return ret;
2473         data = kmalloc(tuna.len, GFP_USER);
2474         if (!data)
2475                 return -ENOMEM;
2476         mutex_lock(&phydev->lock);
2477         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2478         mutex_unlock(&phydev->lock);
2479         if (ret)
2480                 goto out;
2481         useraddr += sizeof(tuna);
2482         ret = -EFAULT;
2483         if (copy_to_user(useraddr, data, tuna.len))
2484                 goto out;
2485         ret = 0;
2486
2487 out:
2488         kfree(data);
2489         return ret;
2490 }
2491
2492 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2493 {
2494         int ret;
2495         struct ethtool_tunable tuna;
2496         struct phy_device *phydev = dev->phydev;
2497         void *data;
2498
2499         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2500                 return -EOPNOTSUPP;
2501         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2502                 return -EFAULT;
2503         ret = ethtool_phy_tunable_valid(&tuna);
2504         if (ret)
2505                 return ret;
2506         data = kmalloc(tuna.len, GFP_USER);
2507         if (!data)
2508                 return -ENOMEM;
2509         useraddr += sizeof(tuna);
2510         ret = -EFAULT;
2511         if (copy_from_user(data, useraddr, tuna.len))
2512                 goto out;
2513         mutex_lock(&phydev->lock);
2514         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2515         mutex_unlock(&phydev->lock);
2516
2517 out:
2518         kfree(data);
2519         return ret;
2520 }
2521
2522 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2523
2524 int dev_ethtool(struct net *net, struct ifreq *ifr)
2525 {
2526         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2527         void __user *useraddr = ifr->ifr_data;
2528         u32 ethcmd, sub_cmd;
2529         int rc;
2530         netdev_features_t old_features;
2531
2532         if (!dev || !netif_device_present(dev))
2533                 return -ENODEV;
2534
2535         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2536                 return -EFAULT;
2537
2538         if (ethcmd == ETHTOOL_PERQUEUE) {
2539                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2540                         return -EFAULT;
2541         } else {
2542                 sub_cmd = ethcmd;
2543         }
2544         /* Allow some commands to be done by anyone */
2545         switch (sub_cmd) {
2546         case ETHTOOL_GSET:
2547         case ETHTOOL_GDRVINFO:
2548         case ETHTOOL_GMSGLVL:
2549         case ETHTOOL_GLINK:
2550         case ETHTOOL_GCOALESCE:
2551         case ETHTOOL_GRINGPARAM:
2552         case ETHTOOL_GPAUSEPARAM:
2553         case ETHTOOL_GRXCSUM:
2554         case ETHTOOL_GTXCSUM:
2555         case ETHTOOL_GSG:
2556         case ETHTOOL_GSSET_INFO:
2557         case ETHTOOL_GSTRINGS:
2558         case ETHTOOL_GSTATS:
2559         case ETHTOOL_GPHYSTATS:
2560         case ETHTOOL_GTSO:
2561         case ETHTOOL_GPERMADDR:
2562         case ETHTOOL_GUFO:
2563         case ETHTOOL_GGSO:
2564         case ETHTOOL_GGRO:
2565         case ETHTOOL_GFLAGS:
2566         case ETHTOOL_GPFLAGS:
2567         case ETHTOOL_GRXFH:
2568         case ETHTOOL_GRXRINGS:
2569         case ETHTOOL_GRXCLSRLCNT:
2570         case ETHTOOL_GRXCLSRULE:
2571         case ETHTOOL_GRXCLSRLALL:
2572         case ETHTOOL_GRXFHINDIR:
2573         case ETHTOOL_GRSSH:
2574         case ETHTOOL_GFEATURES:
2575         case ETHTOOL_GCHANNELS:
2576         case ETHTOOL_GET_TS_INFO:
2577         case ETHTOOL_GEEE:
2578         case ETHTOOL_GTUNABLE:
2579         case ETHTOOL_PHY_GTUNABLE:
2580         case ETHTOOL_GLINKSETTINGS:
2581                 break;
2582         default:
2583                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2584                         return -EPERM;
2585         }
2586
2587         if (dev->ethtool_ops->begin) {
2588                 rc = dev->ethtool_ops->begin(dev);
2589                 if (rc  < 0)
2590                         return rc;
2591         }
2592         old_features = dev->features;
2593
2594         switch (ethcmd) {
2595         case ETHTOOL_GSET:
2596                 rc = ethtool_get_settings(dev, useraddr);
2597                 break;
2598         case ETHTOOL_SSET:
2599                 rc = ethtool_set_settings(dev, useraddr);
2600                 break;
2601         case ETHTOOL_GDRVINFO:
2602                 rc = ethtool_get_drvinfo(dev, useraddr);
2603                 break;
2604         case ETHTOOL_GREGS:
2605                 rc = ethtool_get_regs(dev, useraddr);
2606                 break;
2607         case ETHTOOL_GWOL:
2608                 rc = ethtool_get_wol(dev, useraddr);
2609                 break;
2610         case ETHTOOL_SWOL:
2611                 rc = ethtool_set_wol(dev, useraddr);
2612                 break;
2613         case ETHTOOL_GMSGLVL:
2614                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2615                                        dev->ethtool_ops->get_msglevel);
2616                 break;
2617         case ETHTOOL_SMSGLVL:
2618                 rc = ethtool_set_value_void(dev, useraddr,
2619                                        dev->ethtool_ops->set_msglevel);
2620                 break;
2621         case ETHTOOL_GEEE:
2622                 rc = ethtool_get_eee(dev, useraddr);
2623                 break;
2624         case ETHTOOL_SEEE:
2625                 rc = ethtool_set_eee(dev, useraddr);
2626                 break;
2627         case ETHTOOL_NWAY_RST:
2628                 rc = ethtool_nway_reset(dev);
2629                 break;
2630         case ETHTOOL_GLINK:
2631                 rc = ethtool_get_link(dev, useraddr);
2632                 break;
2633         case ETHTOOL_GEEPROM:
2634                 rc = ethtool_get_eeprom(dev, useraddr);
2635                 break;
2636         case ETHTOOL_SEEPROM:
2637                 rc = ethtool_set_eeprom(dev, useraddr);
2638                 break;
2639         case ETHTOOL_GCOALESCE:
2640                 rc = ethtool_get_coalesce(dev, useraddr);
2641                 break;
2642         case ETHTOOL_SCOALESCE:
2643                 rc = ethtool_set_coalesce(dev, useraddr);
2644                 break;
2645         case ETHTOOL_GRINGPARAM:
2646                 rc = ethtool_get_ringparam(dev, useraddr);
2647                 break;
2648         case ETHTOOL_SRINGPARAM:
2649                 rc = ethtool_set_ringparam(dev, useraddr);
2650                 break;
2651         case ETHTOOL_GPAUSEPARAM:
2652                 rc = ethtool_get_pauseparam(dev, useraddr);
2653                 break;
2654         case ETHTOOL_SPAUSEPARAM:
2655                 rc = ethtool_set_pauseparam(dev, useraddr);
2656                 break;
2657         case ETHTOOL_TEST:
2658                 rc = ethtool_self_test(dev, useraddr);
2659                 break;
2660         case ETHTOOL_GSTRINGS:
2661                 rc = ethtool_get_strings(dev, useraddr);
2662                 break;
2663         case ETHTOOL_PHYS_ID:
2664                 rc = ethtool_phys_id(dev, useraddr);
2665                 break;
2666         case ETHTOOL_GSTATS:
2667                 rc = ethtool_get_stats(dev, useraddr);
2668                 break;
2669         case ETHTOOL_GPERMADDR:
2670                 rc = ethtool_get_perm_addr(dev, useraddr);
2671                 break;
2672         case ETHTOOL_GFLAGS:
2673                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2674                                         __ethtool_get_flags);
2675                 break;
2676         case ETHTOOL_SFLAGS:
2677                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2678                 break;
2679         case ETHTOOL_GPFLAGS:
2680                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2681                                        dev->ethtool_ops->get_priv_flags);
2682                 break;
2683         case ETHTOOL_SPFLAGS:
2684                 rc = ethtool_set_value(dev, useraddr,
2685                                        dev->ethtool_ops->set_priv_flags);
2686                 break;
2687         case ETHTOOL_GRXFH:
2688         case ETHTOOL_GRXRINGS:
2689         case ETHTOOL_GRXCLSRLCNT:
2690         case ETHTOOL_GRXCLSRULE:
2691         case ETHTOOL_GRXCLSRLALL:
2692                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2693                 break;
2694         case ETHTOOL_SRXFH:
2695         case ETHTOOL_SRXCLSRLDEL:
2696         case ETHTOOL_SRXCLSRLINS:
2697                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2698                 break;
2699         case ETHTOOL_FLASHDEV:
2700                 rc = ethtool_flash_device(dev, useraddr);
2701                 break;
2702         case ETHTOOL_RESET:
2703                 rc = ethtool_reset(dev, useraddr);
2704                 break;
2705         case ETHTOOL_GSSET_INFO:
2706                 rc = ethtool_get_sset_info(dev, useraddr);
2707                 break;
2708         case ETHTOOL_GRXFHINDIR:
2709                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2710                 break;
2711         case ETHTOOL_SRXFHINDIR:
2712                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2713                 break;
2714         case ETHTOOL_GRSSH:
2715                 rc = ethtool_get_rxfh(dev, useraddr);
2716                 break;
2717         case ETHTOOL_SRSSH:
2718                 rc = ethtool_set_rxfh(dev, useraddr);
2719                 break;
2720         case ETHTOOL_GFEATURES:
2721                 rc = ethtool_get_features(dev, useraddr);
2722                 break;
2723         case ETHTOOL_SFEATURES:
2724                 rc = ethtool_set_features(dev, useraddr);
2725                 break;
2726         case ETHTOOL_GTXCSUM:
2727         case ETHTOOL_GRXCSUM:
2728         case ETHTOOL_GSG:
2729         case ETHTOOL_GTSO:
2730         case ETHTOOL_GUFO:
2731         case ETHTOOL_GGSO:
2732         case ETHTOOL_GGRO:
2733                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2734                 break;
2735         case ETHTOOL_STXCSUM:
2736         case ETHTOOL_SRXCSUM:
2737         case ETHTOOL_SSG:
2738         case ETHTOOL_STSO:
2739         case ETHTOOL_SUFO:
2740         case ETHTOOL_SGSO:
2741         case ETHTOOL_SGRO:
2742                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2743                 break;
2744         case ETHTOOL_GCHANNELS:
2745                 rc = ethtool_get_channels(dev, useraddr);
2746                 break;
2747         case ETHTOOL_SCHANNELS:
2748                 rc = ethtool_set_channels(dev, useraddr);
2749                 break;
2750         case ETHTOOL_SET_DUMP:
2751                 rc = ethtool_set_dump(dev, useraddr);
2752                 break;
2753         case ETHTOOL_GET_DUMP_FLAG:
2754                 rc = ethtool_get_dump_flag(dev, useraddr);
2755                 break;
2756         case ETHTOOL_GET_DUMP_DATA:
2757                 rc = ethtool_get_dump_data(dev, useraddr);
2758                 break;
2759         case ETHTOOL_GET_TS_INFO:
2760                 rc = ethtool_get_ts_info(dev, useraddr);
2761                 break;
2762         case ETHTOOL_GMODULEINFO:
2763                 rc = ethtool_get_module_info(dev, useraddr);
2764                 break;
2765         case ETHTOOL_GMODULEEEPROM:
2766                 rc = ethtool_get_module_eeprom(dev, useraddr);
2767                 break;
2768         case ETHTOOL_GTUNABLE:
2769                 rc = ethtool_get_tunable(dev, useraddr);
2770                 break;
2771         case ETHTOOL_STUNABLE:
2772                 rc = ethtool_set_tunable(dev, useraddr);
2773                 break;
2774         case ETHTOOL_GPHYSTATS:
2775                 rc = ethtool_get_phy_stats(dev, useraddr);
2776                 break;
2777         case ETHTOOL_PERQUEUE:
2778                 rc = ethtool_set_per_queue(dev, useraddr);
2779                 break;
2780         case ETHTOOL_GLINKSETTINGS:
2781                 rc = ethtool_get_link_ksettings(dev, useraddr);
2782                 break;
2783         case ETHTOOL_SLINKSETTINGS:
2784                 rc = ethtool_set_link_ksettings(dev, useraddr);
2785                 break;
2786         case ETHTOOL_PHY_GTUNABLE:
2787                 rc = get_phy_tunable(dev, useraddr);
2788                 break;
2789         case ETHTOOL_PHY_STUNABLE:
2790                 rc = set_phy_tunable(dev, useraddr);
2791                 break;
2792         default:
2793                 rc = -EOPNOTSUPP;
2794         }
2795
2796         if (dev->ethtool_ops->complete)
2797                 dev->ethtool_ops->complete(dev);
2798
2799         if (old_features != dev->features)
2800                 netdev_features_change(dev);
2801
2802         return rc;
2803 }