net/ethtool/ioctl.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/ethtool.c - Ethtool ioctl handler
   4  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   5  *
   6  * This file is where we call all the ethtool_ops commands to get
   7  * the information ethtool needs.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/types.h>
  12 #include <linux/capability.h>
  13 #include <linux/errno.h>
  14 #include <linux/ethtool.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/net_tstamp.h>
  17 #include <linux/phy.h>
  18 #include <linux/bitops.h>
  19 #include <linux/uaccess.h>
  20 #include <linux/vmalloc.h>
  21 #include <linux/sfp.h>
  22 #include <linux/slab.h>
  23 #include <linux/rtnetlink.h>
  24 #include <linux/sched/signal.h>
  25 #include <linux/net.h>
  26 #include <net/devlink.h>
  27 #include <net/xdp_sock.h>
  28 #include <net/flow_offload.h>
  29 #include <linux/ethtool_netlink.h>
  30 #include <generated/utsrelease.h>
  31 #include "common.h"
  32
  33 /*
  34  * Some useful ethtool_ops methods that're device independent.
  35  * If we find that all drivers want to do the same thing here,
  36  * we can turn these into dev_() function calls.
  37  */
  38
  39 u32 ethtool_op_get_link(struct net_device *dev)
  40 {
  41         return netif_carrier_ok(dev) ? 1 : 0;
  42 }
  43 EXPORT_SYMBOL(ethtool_op_get_link);
  44
  45 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  46 {
  47         info->so_timestamping =
  48                 SOF_TIMESTAMPING_TX_SOFTWARE |
  49                 SOF_TIMESTAMPING_RX_SOFTWARE |
  50                 SOF_TIMESTAMPING_SOFTWARE;
  51         info->phc_index = -1;
  52         return 0;
  53 }
  54 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  55
  56 /* Handlers for each ethtool command */
  57
  58 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  59 {
  60         struct ethtool_gfeatures cmd = {
  61                 .cmd = ETHTOOL_GFEATURES,
  62                 .size = ETHTOOL_DEV_FEATURE_WORDS,
  63         };
  64         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  65         u32 __user *sizeaddr;
  66         u32 copy_size;
  67         int i;
  68
  69         /* in case feature bits run out again */
  70         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  71
  72         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  73                 features[i].available = (u32)(dev->hw_features >> (32 * i));
  74                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
  75                 features[i].active = (u32)(dev->features >> (32 * i));
  76                 features[i].never_changed =
  77                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
  78         }
  79
  80         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
  81         if (get_user(copy_size, sizeaddr))
  82                 return -EFAULT;
  83
  84         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
  85                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
  86
  87         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
  88                 return -EFAULT;
  89         useraddr += sizeof(cmd);
  90         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
  91                 return -EFAULT;
  92
  93         return 0;
  94 }
  95
  96 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
  97 {
  98         struct ethtool_sfeatures cmd;
  99         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 100         netdev_features_t wanted = 0, valid = 0;
 101         int i, ret = 0;
 102
 103         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 104                 return -EFAULT;
 105         useraddr += sizeof(cmd);
 106
 107         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 108                 return -EINVAL;
 109
 110         if (copy_from_user(features, useraddr, sizeof(features)))
 111                 return -EFAULT;
 112
 113         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 114                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 115                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 116         }
 117
 118         if (valid & ~NETIF_F_ETHTOOL_BITS)
 119                 return -EINVAL;
 120
 121         if (valid & ~dev->hw_features) {
 122                 valid &= dev->hw_features;
 123                 ret |= ETHTOOL_F_UNSUPPORTED;
 124         }
 125
 126         dev->wanted_features &= ~valid;
 127         dev->wanted_features |= wanted & valid;
 128         __netdev_update_features(dev);
 129
 130         if ((dev->wanted_features ^ dev->features) & valid)
 131                 ret |= ETHTOOL_F_WISH;
 132
 133         return ret;
 134 }
 135
 136 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 137 {
 138         const struct ethtool_ops *ops = dev->ethtool_ops;
 139
 140         if (sset == ETH_SS_FEATURES)
 141                 return ARRAY_SIZE(netdev_features_strings);
 142
 143         if (sset == ETH_SS_RSS_HASH_FUNCS)
 144                 return ARRAY_SIZE(rss_hash_func_strings);
 145
 146         if (sset == ETH_SS_TUNABLES)
 147                 return ARRAY_SIZE(tunable_strings);
 148
 149         if (sset == ETH_SS_PHY_TUNABLES)
 150                 return ARRAY_SIZE(phy_tunable_strings);
 151
 152         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 153             !ops->get_ethtool_phy_stats)
 154                 return phy_ethtool_get_sset_count(dev->phydev);
 155
 156         if (sset == ETH_SS_LINK_MODES)
 157                 return __ETHTOOL_LINK_MODE_MASK_NBITS;
 158
 159         if (ops->get_sset_count && ops->get_strings)
 160                 return ops->get_sset_count(dev, sset);
 161         else
 162                 return -EOPNOTSUPP;
 163 }
 164
 165 static void __ethtool_get_strings(struct net_device *dev,
 166         u32 stringset, u8 *data)
 167 {
 168         const struct ethtool_ops *ops = dev->ethtool_ops;
 169
 170         if (stringset == ETH_SS_FEATURES)
 171                 memcpy(data, netdev_features_strings,
 172                         sizeof(netdev_features_strings));
 173         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 174                 memcpy(data, rss_hash_func_strings,
 175                        sizeof(rss_hash_func_strings));
 176         else if (stringset == ETH_SS_TUNABLES)
 177                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 178         else if (stringset == ETH_SS_PHY_TUNABLES)
 179                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 180         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 181                  !ops->get_ethtool_phy_stats)
 182                 phy_ethtool_get_strings(dev->phydev, data);
 183         else if (stringset == ETH_SS_LINK_MODES)
 184                 memcpy(data, link_mode_names,
 185                        __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 186         else
 187                 /* ops->get_strings is valid because checked earlier */
 188                 ops->get_strings(dev, stringset, data);
 189 }
 190
 191 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 192 {
 193         /* feature masks of legacy discrete ethtool ops */
 194
 195         switch (eth_cmd) {
 196         case ETHTOOL_GTXCSUM:
 197         case ETHTOOL_STXCSUM:
 198                 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
 199                        NETIF_F_SCTP_CRC;
 200         case ETHTOOL_GRXCSUM:
 201         case ETHTOOL_SRXCSUM:
 202                 return NETIF_F_RXCSUM;
 203         case ETHTOOL_GSG:
 204         case ETHTOOL_SSG:
 205                 return NETIF_F_SG | NETIF_F_FRAGLIST;
 206         case ETHTOOL_GTSO:
 207         case ETHTOOL_STSO:
 208                 return NETIF_F_ALL_TSO;
 209         case ETHTOOL_GGSO:
 210         case ETHTOOL_SGSO:
 211                 return NETIF_F_GSO;
 212         case ETHTOOL_GGRO:
 213         case ETHTOOL_SGRO:
 214                 return NETIF_F_GRO;
 215         default:
 216                 BUG();
 217         }
 218 }
 219
 220 static int ethtool_get_one_feature(struct net_device *dev,
 221         char __user *useraddr, u32 ethcmd)
 222 {
 223         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 224         struct ethtool_value edata = {
 225                 .cmd = ethcmd,
 226                 .data = !!(dev->features & mask),
 227         };
 228
 229         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 230                 return -EFAULT;
 231         return 0;
 232 }
 233
 234 static int ethtool_set_one_feature(struct net_device *dev,
 235         void __user *useraddr, u32 ethcmd)
 236 {
 237         struct ethtool_value edata;
 238         netdev_features_t mask;
 239
 240         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 241                 return -EFAULT;
 242
 243         mask = ethtool_get_feature_mask(ethcmd);
 244         mask &= dev->hw_features;
 245         if (!mask)
 246                 return -EOPNOTSUPP;
 247
 248         if (edata.data)
 249                 dev->wanted_features |= mask;
 250         else
 251                 dev->wanted_features &= ~mask;
 252
 253         __netdev_update_features(dev);
 254
 255         return 0;
 256 }
 257
 258 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 259                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 260 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 261                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 262                           NETIF_F_RXHASH)
 263
 264 static u32 __ethtool_get_flags(struct net_device *dev)
 265 {
 266         u32 flags = 0;
 267
 268         if (dev->features & NETIF_F_LRO)
 269                 flags |= ETH_FLAG_LRO;
 270         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 271                 flags |= ETH_FLAG_RXVLAN;
 272         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 273                 flags |= ETH_FLAG_TXVLAN;
 274         if (dev->features & NETIF_F_NTUPLE)
 275                 flags |= ETH_FLAG_NTUPLE;
 276         if (dev->features & NETIF_F_RXHASH)
 277                 flags |= ETH_FLAG_RXHASH;
 278
 279         return flags;
 280 }
 281
 282 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 283 {
 284         netdev_features_t features = 0, changed;
 285
 286         if (data & ~ETH_ALL_FLAGS)
 287                 return -EINVAL;
 288
 289         if (data & ETH_FLAG_LRO)
 290                 features |= NETIF_F_LRO;
 291         if (data & ETH_FLAG_RXVLAN)
 292                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 293         if (data & ETH_FLAG_TXVLAN)
 294                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 295         if (data & ETH_FLAG_NTUPLE)
 296                 features |= NETIF_F_NTUPLE;
 297         if (data & ETH_FLAG_RXHASH)
 298                 features |= NETIF_F_RXHASH;
 299
 300         /* allow changing only bits set in hw_features */
 301         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 302         if (changed & ~dev->hw_features)
 303                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 304
 305         dev->wanted_features =
 306                 (dev->wanted_features & ~changed) | (features & changed);
 307
 308         __netdev_update_features(dev);
 309
 310         return 0;
 311 }
 312
 313 /* Given two link masks, AND them together and save the result in dst. */
 314 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 315                                   struct ethtool_link_ksettings *src)
 316 {
 317         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 318         unsigned int idx = 0;
 319
 320         for (; idx < size; idx++) {
 321                 dst->link_modes.supported[idx] &=
 322                         src->link_modes.supported[idx];
 323                 dst->link_modes.advertising[idx] &=
 324                         src->link_modes.advertising[idx];
 325         }
 326 }
 327 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 328
 329 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 330                                              u32 legacy_u32)
 331 {
 332         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 333         dst[0] = legacy_u32;
 334 }
 335 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 336
 337 /* return false if src had higher bits set. lower bits always updated. */
 338 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 339                                              const unsigned long *src)
 340 {
 341         bool retval = true;
 342
 343         /* TODO: following test will soon always be true */
 344         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 345                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 346
 347                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 348                 bitmap_fill(ext, 32);
 349                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 350                 if (bitmap_intersects(ext, src,
 351                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 352                         /* src mask goes beyond bit 31 */
 353                         retval = false;
 354                 }
 355         }
 356         *legacy_u32 = src[0];
 357         return retval;
 358 }
 359 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 360
 361 /* return false if ksettings link modes had higher bits
 362  * set. legacy_settings always updated (best effort)
 363  */
 364 static bool
 365 convert_link_ksettings_to_legacy_settings(
 366         struct ethtool_cmd *legacy_settings,
 367         const struct ethtool_link_ksettings *link_ksettings)
 368 {
 369         bool retval = true;
 370
 371         memset(legacy_settings, 0, sizeof(*legacy_settings));
 372         /* this also clears the deprecated fields in legacy structure:
 373          * __u8         transceiver;
 374          * __u32        maxtxpkt;
 375          * __u32        maxrxpkt;
 376          */
 377
 378         retval &= ethtool_convert_link_mode_to_legacy_u32(
 379                 &legacy_settings->supported,
 380                 link_ksettings->link_modes.supported);
 381         retval &= ethtool_convert_link_mode_to_legacy_u32(
 382                 &legacy_settings->advertising,
 383                 link_ksettings->link_modes.advertising);
 384         retval &= ethtool_convert_link_mode_to_legacy_u32(
 385                 &legacy_settings->lp_advertising,
 386                 link_ksettings->link_modes.lp_advertising);
 387         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 388         legacy_settings->duplex
 389                 = link_ksettings->base.duplex;
 390         legacy_settings->port
 391                 = link_ksettings->base.port;
 392         legacy_settings->phy_address
 393                 = link_ksettings->base.phy_address;
 394         legacy_settings->autoneg
 395                 = link_ksettings->base.autoneg;
 396         legacy_settings->mdio_support
 397                 = link_ksettings->base.mdio_support;
 398         legacy_settings->eth_tp_mdix
 399                 = link_ksettings->base.eth_tp_mdix;
 400         legacy_settings->eth_tp_mdix_ctrl
 401                 = link_ksettings->base.eth_tp_mdix_ctrl;
 402         legacy_settings->transceiver
 403                 = link_ksettings->base.transceiver;
 404         return retval;
 405 }
 406
 407 /* number of 32-bit words to store the user's link mode bitmaps */
 408 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 409         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 410
 411 /* layout of the struct passed from/to userland */
 412 struct ethtool_link_usettings {
 413         struct ethtool_link_settings base;
 414         struct {
 415                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 416                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 417                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 418         } link_modes;
 419 };
 420
 421 /* Internal kernel helper to query a device ethtool_link_settings. */
 422 int __ethtool_get_link_ksettings(struct net_device *dev,
 423                                  struct ethtool_link_ksettings *link_ksettings)
 424 {
 425         ASSERT_RTNL();
 426
 427         if (!dev->ethtool_ops->get_link_ksettings)
 428                 return -EOPNOTSUPP;
 429
 430         memset(link_ksettings, 0, sizeof(*link_ksettings));
 431         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 432 }
 433 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 434
 435 /* convert ethtool_link_usettings in user space to a kernel internal
 436  * ethtool_link_ksettings. return 0 on success, errno on error.
 437  */
 438 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 439                                          const void __user *from)
 440 {
 441         struct ethtool_link_usettings link_usettings;
 442
 443         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 444                 return -EFAULT;
 445
 446         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 447         bitmap_from_arr32(to->link_modes.supported,
 448                           link_usettings.link_modes.supported,
 449                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 450         bitmap_from_arr32(to->link_modes.advertising,
 451                           link_usettings.link_modes.advertising,
 452                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 453         bitmap_from_arr32(to->link_modes.lp_advertising,
 454                           link_usettings.link_modes.lp_advertising,
 455                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 456
 457         return 0;
 458 }
 459
 460 /* Check if the user is trying to change anything besides speed/duplex */
 461 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
 462 {
 463         struct ethtool_link_settings base2 = {};
 464
 465         base2.speed = cmd->base.speed;
 466         base2.port = PORT_OTHER;
 467         base2.duplex = cmd->base.duplex;
 468         base2.cmd = cmd->base.cmd;
 469         base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
 470
 471         return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
 472                 bitmap_empty(cmd->link_modes.supported,
 473                              __ETHTOOL_LINK_MODE_MASK_NBITS) &&
 474                 bitmap_empty(cmd->link_modes.lp_advertising,
 475                              __ETHTOOL_LINK_MODE_MASK_NBITS);
 476 }
 477
 478 /* convert a kernel internal ethtool_link_ksettings to
 479  * ethtool_link_usettings in user space. return 0 on success, errno on
 480  * error.
 481  */
 482 static int
 483 store_link_ksettings_for_user(void __user *to,
 484                               const struct ethtool_link_ksettings *from)
 485 {
 486         struct ethtool_link_usettings link_usettings;
 487
 488         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 489         bitmap_to_arr32(link_usettings.link_modes.supported,
 490                         from->link_modes.supported,
 491                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 492         bitmap_to_arr32(link_usettings.link_modes.advertising,
 493                         from->link_modes.advertising,
 494                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 495         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 496                         from->link_modes.lp_advertising,
 497                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 498
 499         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 500                 return -EFAULT;
 501
 502         return 0;
 503 }
 504
 505 /* Query device for its ethtool_link_settings. */
 506 static int ethtool_get_link_ksettings(struct net_device *dev,
 507                                       void __user *useraddr)
 508 {
 509         int err = 0;
 510         struct ethtool_link_ksettings link_ksettings;
 511
 512         ASSERT_RTNL();
 513         if (!dev->ethtool_ops->get_link_ksettings)
 514                 return -EOPNOTSUPP;
 515
 516         /* handle bitmap nbits handshake */
 517         if (copy_from_user(&link_ksettings.base, useraddr,
 518                            sizeof(link_ksettings.base)))
 519                 return -EFAULT;
 520
 521         if (__ETHTOOL_LINK_MODE_MASK_NU32
 522             != link_ksettings.base.link_mode_masks_nwords) {
 523                 /* wrong link mode nbits requested */
 524                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 525                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 526                 /* send back number of words required as negative val */
 527                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 528                                    "need too many bits for link modes!");
 529                 link_ksettings.base.link_mode_masks_nwords
 530                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 531
 532                 /* copy the base fields back to user, not the link
 533                  * mode bitmaps
 534                  */
 535                 if (copy_to_user(useraddr, &link_ksettings.base,
 536                                  sizeof(link_ksettings.base)))
 537                         return -EFAULT;
 538
 539                 return 0;
 540         }
 541
 542         /* handshake successful: user/kernel agree on
 543          * link_mode_masks_nwords
 544          */
 545
 546         memset(&link_ksettings, 0, sizeof(link_ksettings));
 547         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 548         if (err < 0)
 549                 return err;
 550
 551         /* make sure we tell the right values to user */
 552         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 553         link_ksettings.base.link_mode_masks_nwords
 554                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 555
 556         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 557 }
 558
 559 /* Update device ethtool_link_settings. */
 560 static int ethtool_set_link_ksettings(struct net_device *dev,
 561                                       void __user *useraddr)
 562 {
 563         int err;
 564         struct ethtool_link_ksettings link_ksettings;
 565
 566         ASSERT_RTNL();
 567
 568         if (!dev->ethtool_ops->set_link_ksettings)
 569                 return -EOPNOTSUPP;
 570
 571         /* make sure nbits field has expected value */
 572         if (copy_from_user(&link_ksettings.base, useraddr,
 573                            sizeof(link_ksettings.base)))
 574                 return -EFAULT;
 575
 576         if (__ETHTOOL_LINK_MODE_MASK_NU32
 577             != link_ksettings.base.link_mode_masks_nwords)
 578                 return -EINVAL;
 579
 580         /* copy the whole structure, now that we know it has expected
 581          * format
 582          */
 583         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 584         if (err)
 585                 return err;
 586
 587         /* re-check nwords field, just in case */
 588         if (__ETHTOOL_LINK_MODE_MASK_NU32
 589             != link_ksettings.base.link_mode_masks_nwords)
 590                 return -EINVAL;
 591
 592         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 593         if (err >= 0) {
 594                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 595                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 596         }
 597         return err;
 598 }
 599
 600 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 601                                        const struct ethtool_link_ksettings *cmd,
 602                                        u32 *dev_speed, u8 *dev_duplex)
 603 {
 604         u32 speed;
 605         u8 duplex;
 606
 607         speed = cmd->base.speed;
 608         duplex = cmd->base.duplex;
 609         /* don't allow custom speed and duplex */
 610         if (!ethtool_validate_speed(speed) ||
 611             !ethtool_validate_duplex(duplex) ||
 612             !ethtool_virtdev_validate_cmd(cmd))
 613                 return -EINVAL;
 614         *dev_speed = speed;
 615         *dev_duplex = duplex;
 616
 617         return 0;
 618 }
 619 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 620
 621 /* Query device for its ethtool_cmd settings.
 622  *
 623  * Backward compatibility note: for compatibility with legacy ethtool, this is
 624  * now implemented via get_link_ksettings. When driver reports higher link mode
 625  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 626  * recommend user to upgrade ethtool, but the command is successful (only the
 627  * lower link mode bits reported back to user). Deprecated fields from
 628  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 629  */
 630 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 631 {
 632         struct ethtool_link_ksettings link_ksettings;
 633         struct ethtool_cmd cmd;
 634         int err;
 635
 636         ASSERT_RTNL();
 637         if (!dev->ethtool_ops->get_link_ksettings)
 638                 return -EOPNOTSUPP;
 639
 640         memset(&link_ksettings, 0, sizeof(link_ksettings));
 641         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 642         if (err < 0)
 643                 return err;
 644         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 645
 646         /* send a sensible cmd tag back to user */
 647         cmd.cmd = ETHTOOL_GSET;
 648
 649         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 650                 return -EFAULT;
 651
 652         return 0;
 653 }
 654
 655 /* Update device link settings with given ethtool_cmd.
 656  *
 657  * Backward compatibility note: for compatibility with legacy ethtool, this is
 658  * now always implemented via set_link_settings. When user's request updates
 659  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 660  * warning is logged once (with name of 1st driver/device) to recommend user to
 661  * upgrade ethtool, and the request is rejected.
 662  */
 663 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 664 {
 665         struct ethtool_link_ksettings link_ksettings;
 666         struct ethtool_cmd cmd;
 667         int ret;
 668
 669         ASSERT_RTNL();
 670
 671         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 672                 return -EFAULT;
 673         if (!dev->ethtool_ops->set_link_ksettings)
 674                 return -EOPNOTSUPP;
 675
 676         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 677                 return -EINVAL;
 678         link_ksettings.base.link_mode_masks_nwords =
 679                 __ETHTOOL_LINK_MODE_MASK_NU32;
 680         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 681         if (ret >= 0) {
 682                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 683                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 684         }
 685         return ret;
 686 }
 687
 688 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 689                                                   void __user *useraddr)
 690 {
 691         struct ethtool_drvinfo info;
 692         const struct ethtool_ops *ops = dev->ethtool_ops;
 693
 694         memset(&info, 0, sizeof(info));
 695         info.cmd = ETHTOOL_GDRVINFO;
 696         strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
 697         if (ops->get_drvinfo) {
 698                 ops->get_drvinfo(dev, &info);
 699         } else if (dev->dev.parent && dev->dev.parent->driver) {
 700                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 701                         sizeof(info.bus_info));
 702                 strlcpy(info.driver, dev->dev.parent->driver->name,
 703                         sizeof(info.driver));
 704         } else {
 705                 return -EOPNOTSUPP;
 706         }
 707
 708         /*
 709          * this method of obtaining string set info is deprecated;
 710          * Use ETHTOOL_GSSET_INFO instead.
 711          */
 712         if (ops->get_sset_count) {
 713                 int rc;
 714
 715                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 716                 if (rc >= 0)
 717                         info.testinfo_len = rc;
 718                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 719                 if (rc >= 0)
 720                         info.n_stats = rc;
 721                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 722                 if (rc >= 0)
 723                         info.n_priv_flags = rc;
 724         }
 725         if (ops->get_regs_len) {
 726                 int ret = ops->get_regs_len(dev);
 727
 728                 if (ret > 0)
 729                         info.regdump_len = ret;
 730         }
 731
 732         if (ops->get_eeprom_len)
 733                 info.eedump_len = ops->get_eeprom_len(dev);
 734
 735         if (!info.fw_version[0])
 736                 devlink_compat_running_version(dev, info.fw_version,
 737                                                sizeof(info.fw_version));
 738
 739         if (copy_to_user(useraddr, &info, sizeof(info)))
 740                 return -EFAULT;
 741         return 0;
 742 }
 743
 744 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 745                                                     void __user *useraddr)
 746 {
 747         struct ethtool_sset_info info;
 748         u64 sset_mask;
 749         int i, idx = 0, n_bits = 0, ret, rc;
 750         u32 *info_buf = NULL;
 751
 752         if (copy_from_user(&info, useraddr, sizeof(info)))
 753                 return -EFAULT;
 754
 755         /* store copy of mask, because we zero struct later on */
 756         sset_mask = info.sset_mask;
 757         if (!sset_mask)
 758                 return 0;
 759
 760         /* calculate size of return buffer */
 761         n_bits = hweight64(sset_mask);
 762
 763         memset(&info, 0, sizeof(info));
 764         info.cmd = ETHTOOL_GSSET_INFO;
 765
 766         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 767         if (!info_buf)
 768                 return -ENOMEM;
 769
 770         /*
 771          * fill return buffer based on input bitmask and successful
 772          * get_sset_count return
 773          */
 774         for (i = 0; i < 64; i++) {
 775                 if (!(sset_mask & (1ULL << i)))
 776                         continue;
 777
 778                 rc = __ethtool_get_sset_count(dev, i);
 779                 if (rc >= 0) {
 780                         info.sset_mask |= (1ULL << i);
 781                         info_buf[idx++] = rc;
 782                 }
 783         }
 784
 785         ret = -EFAULT;
 786         if (copy_to_user(useraddr, &info, sizeof(info)))
 787                 goto out;
 788
 789         useraddr += offsetof(struct ethtool_sset_info, data);
 790         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 791                 goto out;
 792
 793         ret = 0;
 794
 795 out:
 796         kfree(info_buf);
 797         return ret;
 798 }
 799
 800 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 801                                                 u32 cmd, void __user *useraddr)
 802 {
 803         struct ethtool_rxnfc info;
 804         size_t info_size = sizeof(info);
 805         int rc;
 806
 807         if (!dev->ethtool_ops->set_rxnfc)
 808                 return -EOPNOTSUPP;
 809
 810         /* struct ethtool_rxnfc was originally defined for
 811          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 812          * members.  User-space might still be using that
 813          * definition. */
 814         if (cmd == ETHTOOL_SRXFH)
 815                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 816                              sizeof(info.data));
 817
 818         if (copy_from_user(&info, useraddr, info_size))
 819                 return -EFAULT;
 820
 821         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 822         if (rc)
 823                 return rc;
 824
 825         if (cmd == ETHTOOL_SRXCLSRLINS &&
 826             copy_to_user(useraddr, &info, info_size))
 827                 return -EFAULT;
 828
 829         return 0;
 830 }
 831
 832 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 833                                                 u32 cmd, void __user *useraddr)
 834 {
 835         struct ethtool_rxnfc info;
 836         size_t info_size = sizeof(info);
 837         const struct ethtool_ops *ops = dev->ethtool_ops;
 838         int ret;
 839         void *rule_buf = NULL;
 840
 841         if (!ops->get_rxnfc)
 842                 return -EOPNOTSUPP;
 843
 844         /* struct ethtool_rxnfc was originally defined for
 845          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 846          * members.  User-space might still be using that
 847          * definition. */
 848         if (cmd == ETHTOOL_GRXFH)
 849                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 850                              sizeof(info.data));
 851
 852         if (copy_from_user(&info, useraddr, info_size))
 853                 return -EFAULT;
 854
 855         /* If FLOW_RSS was requested then user-space must be using the
 856          * new definition, as FLOW_RSS is newer.
 857          */
 858         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
 859                 info_size = sizeof(info);
 860                 if (copy_from_user(&info, useraddr, info_size))
 861                         return -EFAULT;
 862                 /* Since malicious users may modify the original data,
 863                  * we need to check whether FLOW_RSS is still requested.
 864                  */
 865                 if (!(info.flow_type & FLOW_RSS))
 866                         return -EINVAL;
 867         }
 868
 869         if (info.cmd != cmd)
 870                 return -EINVAL;
 871
 872         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 873                 if (info.rule_cnt > 0) {
 874                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
 875                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
 876                                                    GFP_USER);
 877                         if (!rule_buf)
 878                                 return -ENOMEM;
 879                 }
 880         }
 881
 882         ret = ops->get_rxnfc(dev, &info, rule_buf);
 883         if (ret < 0)
 884                 goto err_out;
 885
 886         ret = -EFAULT;
 887         if (copy_to_user(useraddr, &info, info_size))
 888                 goto err_out;
 889
 890         if (rule_buf) {
 891                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 892                 if (copy_to_user(useraddr, rule_buf,
 893                                  info.rule_cnt * sizeof(u32)))
 894                         goto err_out;
 895         }
 896         ret = 0;
 897
 898 err_out:
 899         kfree(rule_buf);
 900
 901         return ret;
 902 }
 903
 904 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
 905                                         struct ethtool_rxnfc *rx_rings,
 906                                         u32 size)
 907 {
 908         int i;
 909
 910         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
 911                 return -EFAULT;
 912
 913         /* Validate ring indices */
 914         for (i = 0; i < size; i++)
 915                 if (indir[i] >= rx_rings->data)
 916                         return -EINVAL;
 917
 918         return 0;
 919 }
 920
 921 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
 922
 923 void netdev_rss_key_fill(void *buffer, size_t len)
 924 {
 925         BUG_ON(len > sizeof(netdev_rss_key));
 926         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
 927         memcpy(buffer, netdev_rss_key, len);
 928 }
 929 EXPORT_SYMBOL(netdev_rss_key_fill);
 930
 931 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
 932                                                      void __user *useraddr)
 933 {
 934         u32 user_size, dev_size;
 935         u32 *indir;
 936         int ret;
 937
 938         if (!dev->ethtool_ops->get_rxfh_indir_size ||
 939             !dev->ethtool_ops->get_rxfh)
 940                 return -EOPNOTSUPP;
 941         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
 942         if (dev_size == 0)
 943                 return -EOPNOTSUPP;
 944
 945         if (copy_from_user(&user_size,
 946                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 947                            sizeof(user_size)))
 948                 return -EFAULT;
 949
 950         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
 951                          &dev_size, sizeof(dev_size)))
 952                 return -EFAULT;
 953
 954         /* If the user buffer size is 0, this is just a query for the
 955          * device table size.  Otherwise, if it's smaller than the
 956          * device table size it's an error.
 957          */
 958         if (user_size < dev_size)
 959                 return user_size == 0 ? 0 : -EINVAL;
 960
 961         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
 962         if (!indir)
 963                 return -ENOMEM;
 964
 965         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
 966         if (ret)
 967                 goto out;
 968
 969         if (copy_to_user(useraddr +
 970                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
 971                          indir, dev_size * sizeof(indir[0])))
 972                 ret = -EFAULT;
 973
 974 out:
 975         kfree(indir);
 976         return ret;
 977 }
 978
 979 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
 980                                                      void __user *useraddr)
 981 {
 982         struct ethtool_rxnfc rx_rings;
 983         u32 user_size, dev_size, i;
 984         u32 *indir;
 985         const struct ethtool_ops *ops = dev->ethtool_ops;
 986         int ret;
 987         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
 988
 989         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
 990             !ops->get_rxnfc)
 991                 return -EOPNOTSUPP;
 992
 993         dev_size = ops->get_rxfh_indir_size(dev);
 994         if (dev_size == 0)
 995                 return -EOPNOTSUPP;
 996
 997         if (copy_from_user(&user_size,
 998                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 999                            sizeof(user_size)))
1000                 return -EFAULT;
1001
1002         if (user_size != 0 && user_size != dev_size)
1003                 return -EINVAL;
1004
1005         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1006         if (!indir)
1007                 return -ENOMEM;
1008
1009         rx_rings.cmd = ETHTOOL_GRXRINGS;
1010         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1011         if (ret)
1012                 goto out;
1013
1014         if (user_size == 0) {
1015                 for (i = 0; i < dev_size; i++)
1016                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1017         } else {
1018                 ret = ethtool_copy_validate_indir(indir,
1019                                                   useraddr + ringidx_offset,
1020                                                   &rx_rings,
1021                                                   dev_size);
1022                 if (ret)
1023                         goto out;
1024         }
1025
1026         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1027         if (ret)
1028                 goto out;
1029
1030         /* indicate whether rxfh was set to default */
1031         if (user_size == 0)
1032                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1033         else
1034                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1035
1036 out:
1037         kfree(indir);
1038         return ret;
1039 }
1040
1041 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1042                                                void __user *useraddr)
1043 {
1044         int ret;
1045         const struct ethtool_ops *ops = dev->ethtool_ops;
1046         u32 user_indir_size, user_key_size;
1047         u32 dev_indir_size = 0, dev_key_size = 0;
1048         struct ethtool_rxfh rxfh;
1049         u32 total_size;
1050         u32 indir_bytes;
1051         u32 *indir = NULL;
1052         u8 dev_hfunc = 0;
1053         u8 *hkey = NULL;
1054         u8 *rss_config;
1055
1056         if (!ops->get_rxfh)
1057                 return -EOPNOTSUPP;
1058
1059         if (ops->get_rxfh_indir_size)
1060                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1061         if (ops->get_rxfh_key_size)
1062                 dev_key_size = ops->get_rxfh_key_size(dev);
1063
1064         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1065                 return -EFAULT;
1066         user_indir_size = rxfh.indir_size;
1067         user_key_size = rxfh.key_size;
1068
1069         /* Check that reserved fields are 0 for now */
1070         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1071                 return -EINVAL;
1072         /* Most drivers don't handle rss_context, check it's 0 as well */
1073         if (rxfh.rss_context && !ops->get_rxfh_context)
1074                 return -EOPNOTSUPP;
1075
1076         rxfh.indir_size = dev_indir_size;
1077         rxfh.key_size = dev_key_size;
1078         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1079                 return -EFAULT;
1080
1081         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1082             (user_key_size && (user_key_size != dev_key_size)))
1083                 return -EINVAL;
1084
1085         indir_bytes = user_indir_size * sizeof(indir[0]);
1086         total_size = indir_bytes + user_key_size;
1087         rss_config = kzalloc(total_size, GFP_USER);
1088         if (!rss_config)
1089                 return -ENOMEM;
1090
1091         if (user_indir_size)
1092                 indir = (u32 *)rss_config;
1093
1094         if (user_key_size)
1095                 hkey = rss_config + indir_bytes;
1096
1097         if (rxfh.rss_context)
1098                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1099                                                          &dev_hfunc,
1100                                                          rxfh.rss_context);
1101         else
1102                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1103         if (ret)
1104                 goto out;
1105
1106         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1107                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1108                 ret = -EFAULT;
1109         } else if (copy_to_user(useraddr +
1110                               offsetof(struct ethtool_rxfh, rss_config[0]),
1111                               rss_config, total_size)) {
1112                 ret = -EFAULT;
1113         }
1114 out:
1115         kfree(rss_config);
1116
1117         return ret;
1118 }
1119
1120 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1121                                                void __user *useraddr)
1122 {
1123         int ret;
1124         const struct ethtool_ops *ops = dev->ethtool_ops;
1125         struct ethtool_rxnfc rx_rings;
1126         struct ethtool_rxfh rxfh;
1127         u32 dev_indir_size = 0, dev_key_size = 0, i;
1128         u32 *indir = NULL, indir_bytes = 0;
1129         u8 *hkey = NULL;
1130         u8 *rss_config;
1131         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1132         bool delete = false;
1133
1134         if (!ops->get_rxnfc || !ops->set_rxfh)
1135                 return -EOPNOTSUPP;
1136
1137         if (ops->get_rxfh_indir_size)
1138                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1139         if (ops->get_rxfh_key_size)
1140                 dev_key_size = ops->get_rxfh_key_size(dev);
1141
1142         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1143                 return -EFAULT;
1144
1145         /* Check that reserved fields are 0 for now */
1146         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1147                 return -EINVAL;
1148         /* Most drivers don't handle rss_context, check it's 0 as well */
1149         if (rxfh.rss_context && !ops->set_rxfh_context)
1150                 return -EOPNOTSUPP;
1151
1152         /* If either indir, hash key or function is valid, proceed further.
1153          * Must request at least one change: indir size, hash key or function.
1154          */
1155         if ((rxfh.indir_size &&
1156              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1157              rxfh.indir_size != dev_indir_size) ||
1158             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1159             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1160              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1161                 return -EINVAL;
1162
1163         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1164                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1165
1166         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1167         if (!rss_config)
1168                 return -ENOMEM;
1169
1170         rx_rings.cmd = ETHTOOL_GRXRINGS;
1171         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1172         if (ret)
1173                 goto out;
1174
1175         /* rxfh.indir_size == 0 means reset the indir table to default (master
1176          * context) or delete the context (other RSS contexts).
1177          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1178          */
1179         if (rxfh.indir_size &&
1180             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1181                 indir = (u32 *)rss_config;
1182                 ret = ethtool_copy_validate_indir(indir,
1183                                                   useraddr + rss_cfg_offset,
1184                                                   &rx_rings,
1185                                                   rxfh.indir_size);
1186                 if (ret)
1187                         goto out;
1188         } else if (rxfh.indir_size == 0) {
1189                 if (rxfh.rss_context == 0) {
1190                         indir = (u32 *)rss_config;
1191                         for (i = 0; i < dev_indir_size; i++)
1192                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1193                 } else {
1194                         delete = true;
1195                 }
1196         }
1197
1198         if (rxfh.key_size) {
1199                 hkey = rss_config + indir_bytes;
1200                 if (copy_from_user(hkey,
1201                                    useraddr + rss_cfg_offset + indir_bytes,
1202                                    rxfh.key_size)) {
1203                         ret = -EFAULT;
1204                         goto out;
1205                 }
1206         }
1207
1208         if (rxfh.rss_context)
1209                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1210                                             &rxfh.rss_context, delete);
1211         else
1212                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1213         if (ret)
1214                 goto out;
1215
1216         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1217                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1218                 ret = -EFAULT;
1219
1220         if (!rxfh.rss_context) {
1221                 /* indicate whether rxfh was set to default */
1222                 if (rxfh.indir_size == 0)
1223                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1224                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1225                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1226         }
1227
1228 out:
1229         kfree(rss_config);
1230         return ret;
1231 }
1232
1233 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1234 {
1235         struct ethtool_regs regs;
1236         const struct ethtool_ops *ops = dev->ethtool_ops;
1237         void *regbuf;
1238         int reglen, ret;
1239
1240         if (!ops->get_regs || !ops->get_regs_len)
1241                 return -EOPNOTSUPP;
1242
1243         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1244                 return -EFAULT;
1245
1246         reglen = ops->get_regs_len(dev);
1247         if (reglen <= 0)
1248                 return reglen;
1249
1250         if (regs.len > reglen)
1251                 regs.len = reglen;
1252
1253         regbuf = vzalloc(reglen);
1254         if (!regbuf)
1255                 return -ENOMEM;
1256
1257         if (regs.len < reglen)
1258                 reglen = regs.len;
1259
1260         ops->get_regs(dev, &regs, regbuf);
1261
1262         ret = -EFAULT;
1263         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1264                 goto out;
1265         useraddr += offsetof(struct ethtool_regs, data);
1266         if (copy_to_user(useraddr, regbuf, reglen))
1267                 goto out;
1268         ret = 0;
1269
1270  out:
1271         vfree(regbuf);
1272         return ret;
1273 }
1274
1275 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1276 {
1277         struct ethtool_value reset;
1278         int ret;
1279
1280         if (!dev->ethtool_ops->reset)
1281                 return -EOPNOTSUPP;
1282
1283         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1284                 return -EFAULT;
1285
1286         ret = dev->ethtool_ops->reset(dev, &reset.data);
1287         if (ret)
1288                 return ret;
1289
1290         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1291                 return -EFAULT;
1292         return 0;
1293 }
1294
1295 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1296 {
1297         struct ethtool_wolinfo wol;
1298
1299         if (!dev->ethtool_ops->get_wol)
1300                 return -EOPNOTSUPP;
1301
1302         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1303         wol.cmd = ETHTOOL_GWOL;
1304         dev->ethtool_ops->get_wol(dev, &wol);
1305
1306         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1307                 return -EFAULT;
1308         return 0;
1309 }
1310
1311 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1312 {
1313         struct ethtool_wolinfo wol;
1314         int ret;
1315
1316         if (!dev->ethtool_ops->set_wol)
1317                 return -EOPNOTSUPP;
1318
1319         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1320                 return -EFAULT;
1321
1322         ret = dev->ethtool_ops->set_wol(dev, &wol);
1323         if (ret)
1324                 return ret;
1325
1326         dev->wol_enabled = !!wol.wolopts;
1327         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1328
1329         return 0;
1330 }
1331
1332 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1333 {
1334         struct ethtool_eee edata;
1335         int rc;
1336
1337         if (!dev->ethtool_ops->get_eee)
1338                 return -EOPNOTSUPP;
1339
1340         memset(&edata, 0, sizeof(struct ethtool_eee));
1341         edata.cmd = ETHTOOL_GEEE;
1342         rc = dev->ethtool_ops->get_eee(dev, &edata);
1343
1344         if (rc)
1345                 return rc;
1346
1347         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1348                 return -EFAULT;
1349
1350         return 0;
1351 }
1352
1353 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1354 {
1355         struct ethtool_eee edata;
1356         int ret;
1357
1358         if (!dev->ethtool_ops->set_eee)
1359                 return -EOPNOTSUPP;
1360
1361         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1362                 return -EFAULT;
1363
1364         ret = dev->ethtool_ops->set_eee(dev, &edata);
1365         if (!ret)
1366                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1367         return ret;
1368 }
1369
1370 static int ethtool_nway_reset(struct net_device *dev)
1371 {
1372         if (!dev->ethtool_ops->nway_reset)
1373                 return -EOPNOTSUPP;
1374
1375         return dev->ethtool_ops->nway_reset(dev);
1376 }
1377
1378 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1379 {
1380         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1381         int link = __ethtool_get_link(dev);
1382
1383         if (link < 0)
1384                 return link;
1385
1386         edata.data = link;
1387         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1388                 return -EFAULT;
1389         return 0;
1390 }
1391
1392 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1393                                   int (*getter)(struct net_device *,
1394                                                 struct ethtool_eeprom *, u8 *),
1395                                   u32 total_len)
1396 {
1397         struct ethtool_eeprom eeprom;
1398         void __user *userbuf = useraddr + sizeof(eeprom);
1399         u32 bytes_remaining;
1400         u8 *data;
1401         int ret = 0;
1402
1403         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1404                 return -EFAULT;
1405
1406         /* Check for wrap and zero */
1407         if (eeprom.offset + eeprom.len <= eeprom.offset)
1408                 return -EINVAL;
1409
1410         /* Check for exceeding total eeprom len */
1411         if (eeprom.offset + eeprom.len > total_len)
1412                 return -EINVAL;
1413
1414         data = kmalloc(PAGE_SIZE, GFP_USER);
1415         if (!data)
1416                 return -ENOMEM;
1417
1418         bytes_remaining = eeprom.len;
1419         while (bytes_remaining > 0) {
1420                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1421
1422                 ret = getter(dev, &eeprom, data);
1423                 if (ret)
1424                         break;
1425                 if (copy_to_user(userbuf, data, eeprom.len)) {
1426                         ret = -EFAULT;
1427                         break;
1428                 }
1429                 userbuf += eeprom.len;
1430                 eeprom.offset += eeprom.len;
1431                 bytes_remaining -= eeprom.len;
1432         }
1433
1434         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1435         eeprom.offset -= eeprom.len;
1436         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1437                 ret = -EFAULT;
1438
1439         kfree(data);
1440         return ret;
1441 }
1442
1443 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1444 {
1445         const struct ethtool_ops *ops = dev->ethtool_ops;
1446
1447         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1448             !ops->get_eeprom_len(dev))
1449                 return -EOPNOTSUPP;
1450
1451         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1452                                       ops->get_eeprom_len(dev));
1453 }
1454
1455 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1456 {
1457         struct ethtool_eeprom eeprom;
1458         const struct ethtool_ops *ops = dev->ethtool_ops;
1459         void __user *userbuf = useraddr + sizeof(eeprom);
1460         u32 bytes_remaining;
1461         u8 *data;
1462         int ret = 0;
1463
1464         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1465             !ops->get_eeprom_len(dev))
1466                 return -EOPNOTSUPP;
1467
1468         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1469                 return -EFAULT;
1470
1471         /* Check for wrap and zero */
1472         if (eeprom.offset + eeprom.len <= eeprom.offset)
1473                 return -EINVAL;
1474
1475         /* Check for exceeding total eeprom len */
1476         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1477                 return -EINVAL;
1478
1479         data = kmalloc(PAGE_SIZE, GFP_USER);
1480         if (!data)
1481                 return -ENOMEM;
1482
1483         bytes_remaining = eeprom.len;
1484         while (bytes_remaining > 0) {
1485                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1486
1487                 if (copy_from_user(data, userbuf, eeprom.len)) {
1488                         ret = -EFAULT;
1489                         break;
1490                 }
1491                 ret = ops->set_eeprom(dev, &eeprom, data);
1492                 if (ret)
1493                         break;
1494                 userbuf += eeprom.len;
1495                 eeprom.offset += eeprom.len;
1496                 bytes_remaining -= eeprom.len;
1497         }
1498
1499         kfree(data);
1500         return ret;
1501 }
1502
1503 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1504                                                    void __user *useraddr)
1505 {
1506         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1507
1508         if (!dev->ethtool_ops->get_coalesce)
1509                 return -EOPNOTSUPP;
1510
1511         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1512
1513         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1514                 return -EFAULT;
1515         return 0;
1516 }
1517
1518 static bool
1519 ethtool_set_coalesce_supported(struct net_device *dev,
1520                                struct ethtool_coalesce *coalesce)
1521 {
1522         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1523         u32 nonzero_params = 0;
1524
1525         if (coalesce->rx_coalesce_usecs)
1526                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1527         if (coalesce->rx_max_coalesced_frames)
1528                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1529         if (coalesce->rx_coalesce_usecs_irq)
1530                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1531         if (coalesce->rx_max_coalesced_frames_irq)
1532                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1533         if (coalesce->tx_coalesce_usecs)
1534                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1535         if (coalesce->tx_max_coalesced_frames)
1536                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1537         if (coalesce->tx_coalesce_usecs_irq)
1538                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1539         if (coalesce->tx_max_coalesced_frames_irq)
1540                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1541         if (coalesce->stats_block_coalesce_usecs)
1542                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1543         if (coalesce->use_adaptive_rx_coalesce)
1544                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1545         if (coalesce->use_adaptive_tx_coalesce)
1546                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1547         if (coalesce->pkt_rate_low)
1548                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1549         if (coalesce->rx_coalesce_usecs_low)
1550                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1551         if (coalesce->rx_max_coalesced_frames_low)
1552                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1553         if (coalesce->tx_coalesce_usecs_low)
1554                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1555         if (coalesce->tx_max_coalesced_frames_low)
1556                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1557         if (coalesce->pkt_rate_high)
1558                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1559         if (coalesce->rx_coalesce_usecs_high)
1560                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1561         if (coalesce->rx_max_coalesced_frames_high)
1562                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1563         if (coalesce->tx_coalesce_usecs_high)
1564                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1565         if (coalesce->tx_max_coalesced_frames_high)
1566                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1567         if (coalesce->rate_sample_interval)
1568                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1569
1570         return (supported_params & nonzero_params) == nonzero_params;
1571 }
1572
1573 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1574                                                    void __user *useraddr)
1575 {
1576         struct ethtool_coalesce coalesce;
1577         int ret;
1578
1579         if (!dev->ethtool_ops->set_coalesce)
1580                 return -EOPNOTSUPP;
1581
1582         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1583                 return -EFAULT;
1584
1585         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1586                 return -EOPNOTSUPP;
1587
1588         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce);
1589         if (!ret)
1590                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1591         return ret;
1592 }
1593
1594 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1595 {
1596         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1597
1598         if (!dev->ethtool_ops->get_ringparam)
1599                 return -EOPNOTSUPP;
1600
1601         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1602
1603         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1604                 return -EFAULT;
1605         return 0;
1606 }
1607
1608 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1609 {
1610         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1611         int ret;
1612
1613         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1614                 return -EOPNOTSUPP;
1615
1616         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1617                 return -EFAULT;
1618
1619         dev->ethtool_ops->get_ringparam(dev, &max);
1620
1621         /* ensure new ring parameters are within the maximums */
1622         if (ringparam.rx_pending > max.rx_max_pending ||
1623             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1624             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1625             ringparam.tx_pending > max.tx_max_pending)
1626                 return -EINVAL;
1627
1628         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
1629         if (!ret)
1630                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1631         return ret;
1632 }
1633
1634 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1635                                                    void __user *useraddr)
1636 {
1637         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1638
1639         if (!dev->ethtool_ops->get_channels)
1640                 return -EOPNOTSUPP;
1641
1642         dev->ethtool_ops->get_channels(dev, &channels);
1643
1644         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1645                 return -EFAULT;
1646         return 0;
1647 }
1648
1649 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1650                                                    void __user *useraddr)
1651 {
1652         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1653         u16 from_channel, to_channel;
1654         u32 max_rx_in_use = 0;
1655         unsigned int i;
1656         int ret;
1657
1658         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1659                 return -EOPNOTSUPP;
1660
1661         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1662                 return -EFAULT;
1663
1664         dev->ethtool_ops->get_channels(dev, &curr);
1665
1666         /* ensure new counts are within the maximums */
1667         if (channels.rx_count > curr.max_rx ||
1668             channels.tx_count > curr.max_tx ||
1669             channels.combined_count > curr.max_combined ||
1670             channels.other_count > curr.max_other)
1671                 return -EINVAL;
1672
1673         /* ensure the new Rx count fits within the configured Rx flow
1674          * indirection table settings */
1675         if (netif_is_rxfh_configured(dev) &&
1676             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1677             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1678             return -EINVAL;
1679
1680         /* Disabling channels, query zero-copy AF_XDP sockets */
1681         from_channel = channels.combined_count +
1682                 min(channels.rx_count, channels.tx_count);
1683         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1684         for (i = from_channel; i < to_channel; i++)
1685                 if (xdp_get_umem_from_qid(dev, i))
1686                         return -EINVAL;
1687
1688         ret = dev->ethtool_ops->set_channels(dev, &channels);
1689         if (!ret)
1690                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1691         return ret;
1692 }
1693
1694 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1695 {
1696         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1697
1698         if (!dev->ethtool_ops->get_pauseparam)
1699                 return -EOPNOTSUPP;
1700
1701         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1702
1703         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1704                 return -EFAULT;
1705         return 0;
1706 }
1707
1708 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1709 {
1710         struct ethtool_pauseparam pauseparam;
1711         int ret;
1712
1713         if (!dev->ethtool_ops->set_pauseparam)
1714                 return -EOPNOTSUPP;
1715
1716         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1717                 return -EFAULT;
1718
1719         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1720         if (!ret)
1721                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1722         return ret;
1723 }
1724
1725 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1726 {
1727         struct ethtool_test test;
1728         const struct ethtool_ops *ops = dev->ethtool_ops;
1729         u64 *data;
1730         int ret, test_len;
1731
1732         if (!ops->self_test || !ops->get_sset_count)
1733                 return -EOPNOTSUPP;
1734
1735         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1736         if (test_len < 0)
1737                 return test_len;
1738         WARN_ON(test_len == 0);
1739
1740         if (copy_from_user(&test, useraddr, sizeof(test)))
1741                 return -EFAULT;
1742
1743         test.len = test_len;
1744         data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1745         if (!data)
1746                 return -ENOMEM;
1747
1748         netif_testing_on(dev);
1749         ops->self_test(dev, &test, data);
1750         netif_testing_off(dev);
1751
1752         ret = -EFAULT;
1753         if (copy_to_user(useraddr, &test, sizeof(test)))
1754                 goto out;
1755         useraddr += sizeof(test);
1756         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1757                 goto out;
1758         ret = 0;
1759
1760  out:
1761         kfree(data);
1762         return ret;
1763 }
1764
1765 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1766 {
1767         struct ethtool_gstrings gstrings;
1768         u8 *data;
1769         int ret;
1770
1771         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1772                 return -EFAULT;
1773
1774         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1775         if (ret < 0)
1776                 return ret;
1777         if (ret > S32_MAX / ETH_GSTRING_LEN)
1778                 return -ENOMEM;
1779         WARN_ON_ONCE(!ret);
1780
1781         gstrings.len = ret;
1782
1783         if (gstrings.len) {
1784                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1785                 if (!data)
1786                         return -ENOMEM;
1787
1788                 __ethtool_get_strings(dev, gstrings.string_set, data);
1789         } else {
1790                 data = NULL;
1791         }
1792
1793         ret = -EFAULT;
1794         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1795                 goto out;
1796         useraddr += sizeof(gstrings);
1797         if (gstrings.len &&
1798             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1799                 goto out;
1800         ret = 0;
1801
1802 out:
1803         vfree(data);
1804         return ret;
1805 }
1806
1807 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1808 {
1809         struct ethtool_value id;
1810         static bool busy;
1811         const struct ethtool_ops *ops = dev->ethtool_ops;
1812         int rc;
1813
1814         if (!ops->set_phys_id)
1815                 return -EOPNOTSUPP;
1816
1817         if (busy)
1818                 return -EBUSY;
1819
1820         if (copy_from_user(&id, useraddr, sizeof(id)))
1821                 return -EFAULT;
1822
1823         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1824         if (rc < 0)
1825                 return rc;
1826
1827         /* Drop the RTNL lock while waiting, but prevent reentry or
1828          * removal of the device.
1829          */
1830         busy = true;
1831         dev_hold(dev);
1832         rtnl_unlock();
1833
1834         if (rc == 0) {
1835                 /* Driver will handle this itself */
1836                 schedule_timeout_interruptible(
1837                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1838         } else {
1839                 /* Driver expects to be called at twice the frequency in rc */
1840                 int n = rc * 2, i, interval = HZ / n;
1841
1842                 /* Count down seconds */
1843                 do {
1844                         /* Count down iterations per second */
1845                         i = n;
1846                         do {
1847                                 rtnl_lock();
1848                                 rc = ops->set_phys_id(dev,
1849                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1850                                 rtnl_unlock();
1851                                 if (rc)
1852                                         break;
1853                                 schedule_timeout_interruptible(interval);
1854                         } while (!signal_pending(current) && --i != 0);
1855                 } while (!signal_pending(current) &&
1856                          (id.data == 0 || --id.data != 0));
1857         }
1858
1859         rtnl_lock();
1860         dev_put(dev);
1861         busy = false;
1862
1863         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1864         return rc;
1865 }
1866
1867 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1868 {
1869         struct ethtool_stats stats;
1870         const struct ethtool_ops *ops = dev->ethtool_ops;
1871         u64 *data;
1872         int ret, n_stats;
1873
1874         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1875                 return -EOPNOTSUPP;
1876
1877         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1878         if (n_stats < 0)
1879                 return n_stats;
1880         if (n_stats > S32_MAX / sizeof(u64))
1881                 return -ENOMEM;
1882         WARN_ON_ONCE(!n_stats);
1883         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1884                 return -EFAULT;
1885
1886         stats.n_stats = n_stats;
1887
1888         if (n_stats) {
1889                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1890                 if (!data)
1891                         return -ENOMEM;
1892                 ops->get_ethtool_stats(dev, &stats, data);
1893         } else {
1894                 data = NULL;
1895         }
1896
1897         ret = -EFAULT;
1898         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1899                 goto out;
1900         useraddr += sizeof(stats);
1901         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1902                 goto out;
1903         ret = 0;
1904
1905  out:
1906         vfree(data);
1907         return ret;
1908 }
1909
1910 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1911 {
1912         const struct ethtool_ops *ops = dev->ethtool_ops;
1913         struct phy_device *phydev = dev->phydev;
1914         struct ethtool_stats stats;
1915         u64 *data;
1916         int ret, n_stats;
1917
1918         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1919                 return -EOPNOTSUPP;
1920
1921         if (dev->phydev && !ops->get_ethtool_phy_stats)
1922                 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1923         else
1924                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1925         if (n_stats < 0)
1926                 return n_stats;
1927         if (n_stats > S32_MAX / sizeof(u64))
1928                 return -ENOMEM;
1929         WARN_ON_ONCE(!n_stats);
1930
1931         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1932                 return -EFAULT;
1933
1934         stats.n_stats = n_stats;
1935
1936         if (n_stats) {
1937                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1938                 if (!data)
1939                         return -ENOMEM;
1940
1941                 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1942                         ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1943                         if (ret < 0)
1944                                 goto out;
1945                 } else {
1946                         ops->get_ethtool_phy_stats(dev, &stats, data);
1947                 }
1948         } else {
1949                 data = NULL;
1950         }
1951
1952         ret = -EFAULT;
1953         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1954                 goto out;
1955         useraddr += sizeof(stats);
1956         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1957                 goto out;
1958         ret = 0;
1959
1960  out:
1961         vfree(data);
1962         return ret;
1963 }
1964
1965 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1966 {
1967         struct ethtool_perm_addr epaddr;
1968
1969         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1970                 return -EFAULT;
1971
1972         if (epaddr.size < dev->addr_len)
1973                 return -ETOOSMALL;
1974         epaddr.size = dev->addr_len;
1975
1976         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1977                 return -EFAULT;
1978         useraddr += sizeof(epaddr);
1979         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1980                 return -EFAULT;
1981         return 0;
1982 }
1983
1984 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1985                              u32 cmd, u32 (*actor)(struct net_device *))
1986 {
1987         struct ethtool_value edata = { .cmd = cmd };
1988
1989         if (!actor)
1990                 return -EOPNOTSUPP;
1991
1992         edata.data = actor(dev);
1993
1994         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1995                 return -EFAULT;
1996         return 0;
1997 }
1998
1999 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2000                              void (*actor)(struct net_device *, u32))
2001 {
2002         struct ethtool_value edata;
2003
2004         if (!actor)
2005                 return -EOPNOTSUPP;
2006
2007         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2008                 return -EFAULT;
2009
2010         actor(dev, edata.data);
2011         return 0;
2012 }
2013
2014 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2015                              int (*actor)(struct net_device *, u32))
2016 {
2017         struct ethtool_value edata;
2018
2019         if (!actor)
2020                 return -EOPNOTSUPP;
2021
2022         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2023                 return -EFAULT;
2024
2025         return actor(dev, edata.data);
2026 }
2027
2028 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2029                                                    char __user *useraddr)
2030 {
2031         struct ethtool_flash efl;
2032
2033         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2034                 return -EFAULT;
2035         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2036
2037         if (!dev->ethtool_ops->flash_device)
2038                 return devlink_compat_flash_update(dev, efl.data);
2039
2040         return dev->ethtool_ops->flash_device(dev, &efl);
2041 }
2042
2043 static int ethtool_set_dump(struct net_device *dev,
2044                         void __user *useraddr)
2045 {
2046         struct ethtool_dump dump;
2047
2048         if (!dev->ethtool_ops->set_dump)
2049                 return -EOPNOTSUPP;
2050
2051         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2052                 return -EFAULT;
2053
2054         return dev->ethtool_ops->set_dump(dev, &dump);
2055 }
2056
2057 static int ethtool_get_dump_flag(struct net_device *dev,
2058                                 void __user *useraddr)
2059 {
2060         int ret;
2061         struct ethtool_dump dump;
2062         const struct ethtool_ops *ops = dev->ethtool_ops;
2063
2064         if (!ops->get_dump_flag)
2065                 return -EOPNOTSUPP;
2066
2067         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2068                 return -EFAULT;
2069
2070         ret = ops->get_dump_flag(dev, &dump);
2071         if (ret)
2072                 return ret;
2073
2074         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2075                 return -EFAULT;
2076         return 0;
2077 }
2078
2079 static int ethtool_get_dump_data(struct net_device *dev,
2080                                 void __user *useraddr)
2081 {
2082         int ret;
2083         __u32 len;
2084         struct ethtool_dump dump, tmp;
2085         const struct ethtool_ops *ops = dev->ethtool_ops;
2086         void *data = NULL;
2087
2088         if (!ops->get_dump_data || !ops->get_dump_flag)
2089                 return -EOPNOTSUPP;
2090
2091         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2092                 return -EFAULT;
2093
2094         memset(&tmp, 0, sizeof(tmp));
2095         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2096         ret = ops->get_dump_flag(dev, &tmp);
2097         if (ret)
2098                 return ret;
2099
2100         len = min(tmp.len, dump.len);
2101         if (!len)
2102                 return -EFAULT;
2103
2104         /* Don't ever let the driver think there's more space available
2105          * than it requested with .get_dump_flag().
2106          */
2107         dump.len = len;
2108
2109         /* Always allocate enough space to hold the whole thing so that the
2110          * driver does not need to check the length and bother with partial
2111          * dumping.
2112          */
2113         data = vzalloc(tmp.len);
2114         if (!data)
2115                 return -ENOMEM;
2116         ret = ops->get_dump_data(dev, &dump, data);
2117         if (ret)
2118                 goto out;
2119
2120         /* There are two sane possibilities:
2121          * 1. The driver's .get_dump_data() does not touch dump.len.
2122          * 2. Or it may set dump.len to how much it really writes, which
2123          *    should be tmp.len (or len if it can do a partial dump).
2124          * In any case respond to userspace with the actual length of data
2125          * it's receiving.
2126          */
2127         WARN_ON(dump.len != len && dump.len != tmp.len);
2128         dump.len = len;
2129
2130         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2131                 ret = -EFAULT;
2132                 goto out;
2133         }
2134         useraddr += offsetof(struct ethtool_dump, data);
2135         if (copy_to_user(useraddr, data, len))
2136                 ret = -EFAULT;
2137 out:
2138         vfree(data);
2139         return ret;
2140 }
2141
2142 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2143 {
2144         struct ethtool_ts_info info;
2145         int err;
2146
2147         err = __ethtool_get_ts_info(dev, &info);
2148         if (err)
2149                 return err;
2150
2151         if (copy_to_user(useraddr, &info, sizeof(info)))
2152                 return -EFAULT;
2153
2154         return 0;
2155 }
2156
2157 static int __ethtool_get_module_info(struct net_device *dev,
2158                                      struct ethtool_modinfo *modinfo)
2159 {
2160         const struct ethtool_ops *ops = dev->ethtool_ops;
2161         struct phy_device *phydev = dev->phydev;
2162
2163         if (dev->sfp_bus)
2164                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2165
2166         if (phydev && phydev->drv && phydev->drv->module_info)
2167                 return phydev->drv->module_info(phydev, modinfo);
2168
2169         if (ops->get_module_info)
2170                 return ops->get_module_info(dev, modinfo);
2171
2172         return -EOPNOTSUPP;
2173 }
2174
2175 static int ethtool_get_module_info(struct net_device *dev,
2176                                    void __user *useraddr)
2177 {
2178         int ret;
2179         struct ethtool_modinfo modinfo;
2180
2181         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2182                 return -EFAULT;
2183
2184         ret = __ethtool_get_module_info(dev, &modinfo);
2185         if (ret)
2186                 return ret;
2187
2188         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2189                 return -EFAULT;
2190
2191         return 0;
2192 }
2193
2194 static int __ethtool_get_module_eeprom(struct net_device *dev,
2195                                        struct ethtool_eeprom *ee, u8 *data)
2196 {
2197         const struct ethtool_ops *ops = dev->ethtool_ops;
2198         struct phy_device *phydev = dev->phydev;
2199
2200         if (dev->sfp_bus)
2201                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2202
2203         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2204                 return phydev->drv->module_eeprom(phydev, ee, data);
2205
2206         if (ops->get_module_eeprom)
2207                 return ops->get_module_eeprom(dev, ee, data);
2208
2209         return -EOPNOTSUPP;
2210 }
2211
2212 static int ethtool_get_module_eeprom(struct net_device *dev,
2213                                      void __user *useraddr)
2214 {
2215         int ret;
2216         struct ethtool_modinfo modinfo;
2217
2218         ret = __ethtool_get_module_info(dev, &modinfo);
2219         if (ret)
2220                 return ret;
2221
2222         return ethtool_get_any_eeprom(dev, useraddr,
2223                                       __ethtool_get_module_eeprom,
2224                                       modinfo.eeprom_len);
2225 }
2226
2227 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2228 {
2229         switch (tuna->id) {
2230         case ETHTOOL_RX_COPYBREAK:
2231         case ETHTOOL_TX_COPYBREAK:
2232                 if (tuna->len != sizeof(u32) ||
2233                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2234                         return -EINVAL;
2235                 break;
2236         case ETHTOOL_PFC_PREVENTION_TOUT:
2237                 if (tuna->len != sizeof(u16) ||
2238                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2239                         return -EINVAL;
2240                 break;
2241         default:
2242                 return -EINVAL;
2243         }
2244
2245         return 0;
2246 }
2247
2248 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2249 {
2250         int ret;
2251         struct ethtool_tunable tuna;
2252         const struct ethtool_ops *ops = dev->ethtool_ops;
2253         void *data;
2254
2255         if (!ops->get_tunable)
2256                 return -EOPNOTSUPP;
2257         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2258                 return -EFAULT;
2259         ret = ethtool_tunable_valid(&tuna);
2260         if (ret)
2261                 return ret;
2262         data = kmalloc(tuna.len, GFP_USER);
2263         if (!data)
2264                 return -ENOMEM;
2265         ret = ops->get_tunable(dev, &tuna, data);
2266         if (ret)
2267                 goto out;
2268         useraddr += sizeof(tuna);
2269         ret = -EFAULT;
2270         if (copy_to_user(useraddr, data, tuna.len))
2271                 goto out;
2272         ret = 0;
2273
2274 out:
2275         kfree(data);
2276         return ret;
2277 }
2278
2279 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2280 {
2281         int ret;
2282         struct ethtool_tunable tuna;
2283         const struct ethtool_ops *ops = dev->ethtool_ops;
2284         void *data;
2285
2286         if (!ops->set_tunable)
2287                 return -EOPNOTSUPP;
2288         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2289                 return -EFAULT;
2290         ret = ethtool_tunable_valid(&tuna);
2291         if (ret)
2292                 return ret;
2293         useraddr += sizeof(tuna);
2294         data = memdup_user(useraddr, tuna.len);
2295         if (IS_ERR(data))
2296                 return PTR_ERR(data);
2297         ret = ops->set_tunable(dev, &tuna, data);
2298
2299         kfree(data);
2300         return ret;
2301 }
2302
2303 static noinline_for_stack int
2304 ethtool_get_per_queue_coalesce(struct net_device *dev,
2305                                void __user *useraddr,
2306                                struct ethtool_per_queue_op *per_queue_opt)
2307 {
2308         u32 bit;
2309         int ret;
2310         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2311
2312         if (!dev->ethtool_ops->get_per_queue_coalesce)
2313                 return -EOPNOTSUPP;
2314
2315         useraddr += sizeof(*per_queue_opt);
2316
2317         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2318                           MAX_NUM_QUEUE);
2319
2320         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2321                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2322
2323                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2324                 if (ret != 0)
2325                         return ret;
2326                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2327                         return -EFAULT;
2328                 useraddr += sizeof(coalesce);
2329         }
2330
2331         return 0;
2332 }
2333
2334 static noinline_for_stack int
2335 ethtool_set_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 i, ret = 0;
2341         int n_queue;
2342         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2343         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2344
2345         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2346             (!dev->ethtool_ops->get_per_queue_coalesce))
2347                 return -EOPNOTSUPP;
2348
2349         useraddr += sizeof(*per_queue_opt);
2350
2351         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2352         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2353         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2354         if (!backup)
2355                 return -ENOMEM;
2356
2357         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2358                 struct ethtool_coalesce coalesce;
2359
2360                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2361                 if (ret != 0)
2362                         goto roll_back;
2363
2364                 tmp++;
2365
2366                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2367                         ret = -EFAULT;
2368                         goto roll_back;
2369                 }
2370
2371                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2372                         ret = -EOPNOTSUPP;
2373                         goto roll_back;
2374                 }
2375
2376                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2377                 if (ret != 0)
2378                         goto roll_back;
2379
2380                 useraddr += sizeof(coalesce);
2381         }
2382
2383 roll_back:
2384         if (ret != 0) {
2385                 tmp = backup;
2386                 for_each_set_bit(i, queue_mask, bit) {
2387                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2388                         tmp++;
2389                 }
2390         }
2391         kfree(backup);
2392
2393         return ret;
2394 }
2395
2396 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2397                                  void __user *useraddr, u32 sub_cmd)
2398 {
2399         struct ethtool_per_queue_op per_queue_opt;
2400
2401         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2402                 return -EFAULT;
2403
2404         if (per_queue_opt.sub_command != sub_cmd)
2405                 return -EINVAL;
2406
2407         switch (per_queue_opt.sub_command) {
2408         case ETHTOOL_GCOALESCE:
2409                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2410         case ETHTOOL_SCOALESCE:
2411                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2412         default:
2413                 return -EOPNOTSUPP;
2414         };
2415 }
2416
2417 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2418 {
2419         switch (tuna->id) {
2420         case ETHTOOL_PHY_DOWNSHIFT:
2421         case ETHTOOL_PHY_FAST_LINK_DOWN:
2422                 if (tuna->len != sizeof(u8) ||
2423                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2424                         return -EINVAL;
2425                 break;
2426         case ETHTOOL_PHY_EDPD:
2427                 if (tuna->len != sizeof(u16) ||
2428                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2429                         return -EINVAL;
2430                 break;
2431         default:
2432                 return -EINVAL;
2433         }
2434
2435         return 0;
2436 }
2437
2438 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2439 {
2440         int ret;
2441         struct ethtool_tunable tuna;
2442         struct phy_device *phydev = dev->phydev;
2443         void *data;
2444
2445         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2446                 return -EOPNOTSUPP;
2447
2448         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2449                 return -EFAULT;
2450         ret = ethtool_phy_tunable_valid(&tuna);
2451         if (ret)
2452                 return ret;
2453         data = kmalloc(tuna.len, GFP_USER);
2454         if (!data)
2455                 return -ENOMEM;
2456         mutex_lock(&phydev->lock);
2457         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2458         mutex_unlock(&phydev->lock);
2459         if (ret)
2460                 goto out;
2461         useraddr += sizeof(tuna);
2462         ret = -EFAULT;
2463         if (copy_to_user(useraddr, data, tuna.len))
2464                 goto out;
2465         ret = 0;
2466
2467 out:
2468         kfree(data);
2469         return ret;
2470 }
2471
2472 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2473 {
2474         int ret;
2475         struct ethtool_tunable tuna;
2476         struct phy_device *phydev = dev->phydev;
2477         void *data;
2478
2479         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2480                 return -EOPNOTSUPP;
2481         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2482                 return -EFAULT;
2483         ret = ethtool_phy_tunable_valid(&tuna);
2484         if (ret)
2485                 return ret;
2486         useraddr += sizeof(tuna);
2487         data = memdup_user(useraddr, tuna.len);
2488         if (IS_ERR(data))
2489                 return PTR_ERR(data);
2490         mutex_lock(&phydev->lock);
2491         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2492         mutex_unlock(&phydev->lock);
2493
2494         kfree(data);
2495         return ret;
2496 }
2497
2498 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2499 {
2500         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2501         int rc;
2502
2503         if (!dev->ethtool_ops->get_fecparam)
2504                 return -EOPNOTSUPP;
2505
2506         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2507         if (rc)
2508                 return rc;
2509
2510         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2511                 return -EFAULT;
2512         return 0;
2513 }
2514
2515 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2516 {
2517         struct ethtool_fecparam fecparam;
2518
2519         if (!dev->ethtool_ops->set_fecparam)
2520                 return -EOPNOTSUPP;
2521
2522         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2523                 return -EFAULT;
2524
2525         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2526 }
2527
2528 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2529
2530 int dev_ethtool(struct net *net, struct ifreq *ifr)
2531 {
2532         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2533         void __user *useraddr = ifr->ifr_data;
2534         u32 ethcmd, sub_cmd;
2535         int rc;
2536         netdev_features_t old_features;
2537
2538         if (!dev || !netif_device_present(dev))
2539                 return -ENODEV;
2540
2541         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2542                 return -EFAULT;
2543
2544         if (ethcmd == ETHTOOL_PERQUEUE) {
2545                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2546                         return -EFAULT;
2547         } else {
2548                 sub_cmd = ethcmd;
2549         }
2550         /* Allow some commands to be done by anyone */
2551         switch (sub_cmd) {
2552         case ETHTOOL_GSET:
2553         case ETHTOOL_GDRVINFO:
2554         case ETHTOOL_GMSGLVL:
2555         case ETHTOOL_GLINK:
2556         case ETHTOOL_GCOALESCE:
2557         case ETHTOOL_GRINGPARAM:
2558         case ETHTOOL_GPAUSEPARAM:
2559         case ETHTOOL_GRXCSUM:
2560         case ETHTOOL_GTXCSUM:
2561         case ETHTOOL_GSG:
2562         case ETHTOOL_GSSET_INFO:
2563         case ETHTOOL_GSTRINGS:
2564         case ETHTOOL_GSTATS:
2565         case ETHTOOL_GPHYSTATS:
2566         case ETHTOOL_GTSO:
2567         case ETHTOOL_GPERMADDR:
2568         case ETHTOOL_GUFO:
2569         case ETHTOOL_GGSO:
2570         case ETHTOOL_GGRO:
2571         case ETHTOOL_GFLAGS:
2572         case ETHTOOL_GPFLAGS:
2573         case ETHTOOL_GRXFH:
2574         case ETHTOOL_GRXRINGS:
2575         case ETHTOOL_GRXCLSRLCNT:
2576         case ETHTOOL_GRXCLSRULE:
2577         case ETHTOOL_GRXCLSRLALL:
2578         case ETHTOOL_GRXFHINDIR:
2579         case ETHTOOL_GRSSH:
2580         case ETHTOOL_GFEATURES:
2581         case ETHTOOL_GCHANNELS:
2582         case ETHTOOL_GET_TS_INFO:
2583         case ETHTOOL_GEEE:
2584         case ETHTOOL_GTUNABLE:
2585         case ETHTOOL_PHY_GTUNABLE:
2586         case ETHTOOL_GLINKSETTINGS:
2587         case ETHTOOL_GFECPARAM:
2588                 break;
2589         default:
2590                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2591                         return -EPERM;
2592         }
2593
2594         if (dev->ethtool_ops->begin) {
2595                 rc = dev->ethtool_ops->begin(dev);
2596                 if (rc  < 0)
2597                         return rc;
2598         }
2599         old_features = dev->features;
2600
2601         switch (ethcmd) {
2602         case ETHTOOL_GSET:
2603                 rc = ethtool_get_settings(dev, useraddr);
2604                 break;
2605         case ETHTOOL_SSET:
2606                 rc = ethtool_set_settings(dev, useraddr);
2607                 break;
2608         case ETHTOOL_GDRVINFO:
2609                 rc = ethtool_get_drvinfo(dev, useraddr);
2610                 break;
2611         case ETHTOOL_GREGS:
2612                 rc = ethtool_get_regs(dev, useraddr);
2613                 break;
2614         case ETHTOOL_GWOL:
2615                 rc = ethtool_get_wol(dev, useraddr);
2616                 break;
2617         case ETHTOOL_SWOL:
2618                 rc = ethtool_set_wol(dev, useraddr);
2619                 break;
2620         case ETHTOOL_GMSGLVL:
2621                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2622                                        dev->ethtool_ops->get_msglevel);
2623                 break;
2624         case ETHTOOL_SMSGLVL:
2625                 rc = ethtool_set_value_void(dev, useraddr,
2626                                        dev->ethtool_ops->set_msglevel);
2627                 if (!rc)
2628                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2629                 break;
2630         case ETHTOOL_GEEE:
2631                 rc = ethtool_get_eee(dev, useraddr);
2632                 break;
2633         case ETHTOOL_SEEE:
2634                 rc = ethtool_set_eee(dev, useraddr);
2635                 break;
2636         case ETHTOOL_NWAY_RST:
2637                 rc = ethtool_nway_reset(dev);
2638                 break;
2639         case ETHTOOL_GLINK:
2640                 rc = ethtool_get_link(dev, useraddr);
2641                 break;
2642         case ETHTOOL_GEEPROM:
2643                 rc = ethtool_get_eeprom(dev, useraddr);
2644                 break;
2645         case ETHTOOL_SEEPROM:
2646                 rc = ethtool_set_eeprom(dev, useraddr);
2647                 break;
2648         case ETHTOOL_GCOALESCE:
2649                 rc = ethtool_get_coalesce(dev, useraddr);
2650                 break;
2651         case ETHTOOL_SCOALESCE:
2652                 rc = ethtool_set_coalesce(dev, useraddr);
2653                 break;
2654         case ETHTOOL_GRINGPARAM:
2655                 rc = ethtool_get_ringparam(dev, useraddr);
2656                 break;
2657         case ETHTOOL_SRINGPARAM:
2658                 rc = ethtool_set_ringparam(dev, useraddr);
2659                 break;
2660         case ETHTOOL_GPAUSEPARAM:
2661                 rc = ethtool_get_pauseparam(dev, useraddr);
2662                 break;
2663         case ETHTOOL_SPAUSEPARAM:
2664                 rc = ethtool_set_pauseparam(dev, useraddr);
2665                 break;
2666         case ETHTOOL_TEST:
2667                 rc = ethtool_self_test(dev, useraddr);
2668                 break;
2669         case ETHTOOL_GSTRINGS:
2670                 rc = ethtool_get_strings(dev, useraddr);
2671                 break;
2672         case ETHTOOL_PHYS_ID:
2673                 rc = ethtool_phys_id(dev, useraddr);
2674                 break;
2675         case ETHTOOL_GSTATS:
2676                 rc = ethtool_get_stats(dev, useraddr);
2677                 break;
2678         case ETHTOOL_GPERMADDR:
2679                 rc = ethtool_get_perm_addr(dev, useraddr);
2680                 break;
2681         case ETHTOOL_GFLAGS:
2682                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2683                                         __ethtool_get_flags);
2684                 break;
2685         case ETHTOOL_SFLAGS:
2686                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2687                 break;
2688         case ETHTOOL_GPFLAGS:
2689                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2690                                        dev->ethtool_ops->get_priv_flags);
2691                 if (!rc)
2692                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2693                 break;
2694         case ETHTOOL_SPFLAGS:
2695                 rc = ethtool_set_value(dev, useraddr,
2696                                        dev->ethtool_ops->set_priv_flags);
2697                 break;
2698         case ETHTOOL_GRXFH:
2699         case ETHTOOL_GRXRINGS:
2700         case ETHTOOL_GRXCLSRLCNT:
2701         case ETHTOOL_GRXCLSRULE:
2702         case ETHTOOL_GRXCLSRLALL:
2703                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2704                 break;
2705         case ETHTOOL_SRXFH:
2706         case ETHTOOL_SRXCLSRLDEL:
2707         case ETHTOOL_SRXCLSRLINS:
2708                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2709                 break;
2710         case ETHTOOL_FLASHDEV:
2711                 rc = ethtool_flash_device(dev, useraddr);
2712                 break;
2713         case ETHTOOL_RESET:
2714                 rc = ethtool_reset(dev, useraddr);
2715                 break;
2716         case ETHTOOL_GSSET_INFO:
2717                 rc = ethtool_get_sset_info(dev, useraddr);
2718                 break;
2719         case ETHTOOL_GRXFHINDIR:
2720                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2721                 break;
2722         case ETHTOOL_SRXFHINDIR:
2723                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2724                 break;
2725         case ETHTOOL_GRSSH:
2726                 rc = ethtool_get_rxfh(dev, useraddr);
2727                 break;
2728         case ETHTOOL_SRSSH:
2729                 rc = ethtool_set_rxfh(dev, useraddr);
2730                 break;
2731         case ETHTOOL_GFEATURES:
2732                 rc = ethtool_get_features(dev, useraddr);
2733                 break;
2734         case ETHTOOL_SFEATURES:
2735                 rc = ethtool_set_features(dev, useraddr);
2736                 break;
2737         case ETHTOOL_GTXCSUM:
2738         case ETHTOOL_GRXCSUM:
2739         case ETHTOOL_GSG:
2740         case ETHTOOL_GTSO:
2741         case ETHTOOL_GGSO:
2742         case ETHTOOL_GGRO:
2743                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2744                 break;
2745         case ETHTOOL_STXCSUM:
2746         case ETHTOOL_SRXCSUM:
2747         case ETHTOOL_SSG:
2748         case ETHTOOL_STSO:
2749         case ETHTOOL_SGSO:
2750         case ETHTOOL_SGRO:
2751                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2752                 break;
2753         case ETHTOOL_GCHANNELS:
2754                 rc = ethtool_get_channels(dev, useraddr);
2755                 break;
2756         case ETHTOOL_SCHANNELS:
2757                 rc = ethtool_set_channels(dev, useraddr);
2758                 break;
2759         case ETHTOOL_SET_DUMP:
2760                 rc = ethtool_set_dump(dev, useraddr);
2761                 break;
2762         case ETHTOOL_GET_DUMP_FLAG:
2763                 rc = ethtool_get_dump_flag(dev, useraddr);
2764                 break;
2765         case ETHTOOL_GET_DUMP_DATA:
2766                 rc = ethtool_get_dump_data(dev, useraddr);
2767                 break;
2768         case ETHTOOL_GET_TS_INFO:
2769                 rc = ethtool_get_ts_info(dev, useraddr);
2770                 break;
2771         case ETHTOOL_GMODULEINFO:
2772                 rc = ethtool_get_module_info(dev, useraddr);
2773                 break;
2774         case ETHTOOL_GMODULEEEPROM:
2775                 rc = ethtool_get_module_eeprom(dev, useraddr);
2776                 break;
2777         case ETHTOOL_GTUNABLE:
2778                 rc = ethtool_get_tunable(dev, useraddr);
2779                 break;
2780         case ETHTOOL_STUNABLE:
2781                 rc = ethtool_set_tunable(dev, useraddr);
2782                 break;
2783         case ETHTOOL_GPHYSTATS:
2784                 rc = ethtool_get_phy_stats(dev, useraddr);
2785                 break;
2786         case ETHTOOL_PERQUEUE:
2787                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2788                 break;
2789         case ETHTOOL_GLINKSETTINGS:
2790                 rc = ethtool_get_link_ksettings(dev, useraddr);
2791                 break;
2792         case ETHTOOL_SLINKSETTINGS:
2793                 rc = ethtool_set_link_ksettings(dev, useraddr);
2794                 break;
2795         case ETHTOOL_PHY_GTUNABLE:
2796                 rc = get_phy_tunable(dev, useraddr);
2797                 break;
2798         case ETHTOOL_PHY_STUNABLE:
2799                 rc = set_phy_tunable(dev, useraddr);
2800                 break;
2801         case ETHTOOL_GFECPARAM:
2802                 rc = ethtool_get_fecparam(dev, useraddr);
2803                 break;
2804         case ETHTOOL_SFECPARAM:
2805                 rc = ethtool_set_fecparam(dev, useraddr);
2806                 break;
2807         default:
2808                 rc = -EOPNOTSUPP;
2809         }
2810
2811         if (dev->ethtool_ops->complete)
2812                 dev->ethtool_ops->complete(dev);
2813
2814         if (old_features != dev->features)
2815                 netdev_features_change(dev);
2816
2817         return rc;
2818 }
2819
2820 struct ethtool_rx_flow_key {
2821         struct flow_dissector_key_basic                 basic;
2822         union {
2823                 struct flow_dissector_key_ipv4_addrs    ipv4;
2824                 struct flow_dissector_key_ipv6_addrs    ipv6;
2825         };
2826         struct flow_dissector_key_ports                 tp;
2827         struct flow_dissector_key_ip                    ip;
2828         struct flow_dissector_key_vlan                  vlan;
2829         struct flow_dissector_key_eth_addrs             eth_addrs;
2830 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2831
2832 struct ethtool_rx_flow_match {
2833         struct flow_dissector           dissector;
2834         struct ethtool_rx_flow_key      key;
2835         struct ethtool_rx_flow_key      mask;
2836 };
2837
2838 struct ethtool_rx_flow_rule *
2839 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2840 {
2841         const struct ethtool_rx_flow_spec *fs = input->fs;
2842         static struct in6_addr zero_addr = {};
2843         struct ethtool_rx_flow_match *match;
2844         struct ethtool_rx_flow_rule *flow;
2845         struct flow_action_entry *act;
2846
2847         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2848                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2849         if (!flow)
2850                 return ERR_PTR(-ENOMEM);
2851
2852         /* ethtool_rx supports only one single action per rule. */
2853         flow->rule = flow_rule_alloc(1);
2854         if (!flow->rule) {
2855                 kfree(flow);
2856                 return ERR_PTR(-ENOMEM);
2857         }
2858
2859         match = (struct ethtool_rx_flow_match *)flow->priv;
2860         flow->rule->match.dissector     = &match->dissector;
2861         flow->rule->match.mask          = &match->mask;
2862         flow->rule->match.key           = &match->key;
2863
2864         match->mask.basic.n_proto = htons(0xffff);
2865
2866         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2867         case ETHER_FLOW: {
2868                 const struct ethhdr *ether_spec, *ether_m_spec;
2869
2870                 ether_spec = &fs->h_u.ether_spec;
2871                 ether_m_spec = &fs->m_u.ether_spec;
2872
2873                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
2874                         ether_addr_copy(match->key.eth_addrs.src,
2875                                         ether_spec->h_source);
2876                         ether_addr_copy(match->mask.eth_addrs.src,
2877                                         ether_m_spec->h_source);
2878                 }
2879                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
2880                         ether_addr_copy(match->key.eth_addrs.dst,
2881                                         ether_spec->h_dest);
2882                         ether_addr_copy(match->mask.eth_addrs.dst,
2883                                         ether_m_spec->h_dest);
2884                 }
2885                 if (ether_m_spec->h_proto) {
2886                         match->key.basic.n_proto = ether_spec->h_proto;
2887                         match->mask.basic.n_proto = ether_m_spec->h_proto;
2888                 }
2889                 }
2890                 break;
2891         case TCP_V4_FLOW:
2892         case UDP_V4_FLOW: {
2893                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2894
2895                 match->key.basic.n_proto = htons(ETH_P_IP);
2896
2897                 v4_spec = &fs->h_u.tcp_ip4_spec;
2898                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2899
2900                 if (v4_m_spec->ip4src) {
2901                         match->key.ipv4.src = v4_spec->ip4src;
2902                         match->mask.ipv4.src = v4_m_spec->ip4src;
2903                 }
2904                 if (v4_m_spec->ip4dst) {
2905                         match->key.ipv4.dst = v4_spec->ip4dst;
2906                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
2907                 }
2908                 if (v4_m_spec->ip4src ||
2909                     v4_m_spec->ip4dst) {
2910                         match->dissector.used_keys |=
2911                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2912                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2913                                 offsetof(struct ethtool_rx_flow_key, ipv4);
2914                 }
2915                 if (v4_m_spec->psrc) {
2916                         match->key.tp.src = v4_spec->psrc;
2917                         match->mask.tp.src = v4_m_spec->psrc;
2918                 }
2919                 if (v4_m_spec->pdst) {
2920                         match->key.tp.dst = v4_spec->pdst;
2921                         match->mask.tp.dst = v4_m_spec->pdst;
2922                 }
2923                 if (v4_m_spec->psrc ||
2924                     v4_m_spec->pdst) {
2925                         match->dissector.used_keys |=
2926                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2927                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2928                                 offsetof(struct ethtool_rx_flow_key, tp);
2929                 }
2930                 if (v4_m_spec->tos) {
2931                         match->key.ip.tos = v4_spec->tos;
2932                         match->mask.ip.tos = v4_m_spec->tos;
2933                         match->dissector.used_keys |=
2934                                 BIT(FLOW_DISSECTOR_KEY_IP);
2935                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2936                                 offsetof(struct ethtool_rx_flow_key, ip);
2937                 }
2938                 }
2939                 break;
2940         case TCP_V6_FLOW:
2941         case UDP_V6_FLOW: {
2942                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2943
2944                 match->key.basic.n_proto = htons(ETH_P_IPV6);
2945
2946                 v6_spec = &fs->h_u.tcp_ip6_spec;
2947                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2948                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2949                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2950                                sizeof(match->key.ipv6.src));
2951                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2952                                sizeof(match->mask.ipv6.src));
2953                 }
2954                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2955                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2956                                sizeof(match->key.ipv6.dst));
2957                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2958                                sizeof(match->mask.ipv6.dst));
2959                 }
2960                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2961                     memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2962                         match->dissector.used_keys |=
2963                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2964                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2965                                 offsetof(struct ethtool_rx_flow_key, ipv6);
2966                 }
2967                 if (v6_m_spec->psrc) {
2968                         match->key.tp.src = v6_spec->psrc;
2969                         match->mask.tp.src = v6_m_spec->psrc;
2970                 }
2971                 if (v6_m_spec->pdst) {
2972                         match->key.tp.dst = v6_spec->pdst;
2973                         match->mask.tp.dst = v6_m_spec->pdst;
2974                 }
2975                 if (v6_m_spec->psrc ||
2976                     v6_m_spec->pdst) {
2977                         match->dissector.used_keys |=
2978                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2979                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2980                                 offsetof(struct ethtool_rx_flow_key, tp);
2981                 }
2982                 if (v6_m_spec->tclass) {
2983                         match->key.ip.tos = v6_spec->tclass;
2984                         match->mask.ip.tos = v6_m_spec->tclass;
2985                         match->dissector.used_keys |=
2986                                 BIT(FLOW_DISSECTOR_KEY_IP);
2987                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2988                                 offsetof(struct ethtool_rx_flow_key, ip);
2989                 }
2990                 }
2991                 break;
2992         default:
2993                 ethtool_rx_flow_rule_destroy(flow);
2994                 return ERR_PTR(-EINVAL);
2995         }
2996
2997         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2998         case TCP_V4_FLOW:
2999         case TCP_V6_FLOW:
3000                 match->key.basic.ip_proto = IPPROTO_TCP;
3001                 break;
3002         case UDP_V4_FLOW:
3003         case UDP_V6_FLOW:
3004                 match->key.basic.ip_proto = IPPROTO_UDP;
3005                 break;
3006         }
3007         match->mask.basic.ip_proto = 0xff;
3008
3009         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3010         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3011                 offsetof(struct ethtool_rx_flow_key, basic);
3012
3013         if (fs->flow_type & FLOW_EXT) {
3014                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3015                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3016
3017                 if (ext_m_spec->vlan_etype) {
3018                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3019                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3020                 }
3021
3022                 if (ext_m_spec->vlan_tci) {
3023                         match->key.vlan.vlan_id =
3024                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3025                         match->mask.vlan.vlan_id =
3026                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3027
3028                         match->key.vlan.vlan_dei =
3029                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3030                         match->mask.vlan.vlan_dei =
3031                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3032
3033                         match->key.vlan.vlan_priority =
3034                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3035                         match->mask.vlan.vlan_priority =
3036                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3037                 }
3038
3039                 if (ext_m_spec->vlan_etype ||
3040                     ext_m_spec->vlan_tci) {
3041                         match->dissector.used_keys |=
3042                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
3043                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3044                                 offsetof(struct ethtool_rx_flow_key, vlan);
3045                 }
3046         }
3047         if (fs->flow_type & FLOW_MAC_EXT) {
3048                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3049                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3050
3051                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3052                        ETH_ALEN);
3053                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3054                        ETH_ALEN);
3055
3056                 match->dissector.used_keys |=
3057                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3058                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3059                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3060         }
3061
3062         act = &flow->rule->action.entries[0];
3063         switch (fs->ring_cookie) {
3064         case RX_CLS_FLOW_DISC:
3065                 act->id = FLOW_ACTION_DROP;
3066                 break;
3067         case RX_CLS_FLOW_WAKE:
3068                 act->id = FLOW_ACTION_WAKE;
3069                 break;
3070         default:
3071                 act->id = FLOW_ACTION_QUEUE;
3072                 if (fs->flow_type & FLOW_RSS)
3073                         act->queue.ctx = input->rss_ctx;
3074
3075                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3076                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3077                 break;
3078         }
3079
3080         return flow;
3081 }
3082 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3083
3084 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3085 {
3086         kfree(flow->rule);
3087         kfree(flow);
3088 }
3089 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);