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         link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
 556         link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 557
 558         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 559 }
 560
 561 /* Update device ethtool_link_settings. */
 562 static int ethtool_set_link_ksettings(struct net_device *dev,
 563                                       void __user *useraddr)
 564 {
 565         int err;
 566         struct ethtool_link_ksettings link_ksettings;
 567
 568         ASSERT_RTNL();
 569
 570         if (!dev->ethtool_ops->set_link_ksettings)
 571                 return -EOPNOTSUPP;
 572
 573         /* make sure nbits field has expected value */
 574         if (copy_from_user(&link_ksettings.base, useraddr,
 575                            sizeof(link_ksettings.base)))
 576                 return -EFAULT;
 577
 578         if (__ETHTOOL_LINK_MODE_MASK_NU32
 579             != link_ksettings.base.link_mode_masks_nwords)
 580                 return -EINVAL;
 581
 582         /* copy the whole structure, now that we know it has expected
 583          * format
 584          */
 585         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 586         if (err)
 587                 return err;
 588
 589         /* re-check nwords field, just in case */
 590         if (__ETHTOOL_LINK_MODE_MASK_NU32
 591             != link_ksettings.base.link_mode_masks_nwords)
 592                 return -EINVAL;
 593
 594         if (link_ksettings.base.master_slave_cfg ||
 595             link_ksettings.base.master_slave_state)
 596                 return -EINVAL;
 597
 598         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 599         if (err >= 0) {
 600                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 601                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 602         }
 603         return err;
 604 }
 605
 606 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 607                                        const struct ethtool_link_ksettings *cmd,
 608                                        u32 *dev_speed, u8 *dev_duplex)
 609 {
 610         u32 speed;
 611         u8 duplex;
 612
 613         speed = cmd->base.speed;
 614         duplex = cmd->base.duplex;
 615         /* don't allow custom speed and duplex */
 616         if (!ethtool_validate_speed(speed) ||
 617             !ethtool_validate_duplex(duplex) ||
 618             !ethtool_virtdev_validate_cmd(cmd))
 619                 return -EINVAL;
 620         *dev_speed = speed;
 621         *dev_duplex = duplex;
 622
 623         return 0;
 624 }
 625 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 626
 627 /* Query device for its ethtool_cmd settings.
 628  *
 629  * Backward compatibility note: for compatibility with legacy ethtool, this is
 630  * now implemented via get_link_ksettings. When driver reports higher link mode
 631  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 632  * recommend user to upgrade ethtool, but the command is successful (only the
 633  * lower link mode bits reported back to user). Deprecated fields from
 634  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 635  */
 636 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 637 {
 638         struct ethtool_link_ksettings link_ksettings;
 639         struct ethtool_cmd cmd;
 640         int err;
 641
 642         ASSERT_RTNL();
 643         if (!dev->ethtool_ops->get_link_ksettings)
 644                 return -EOPNOTSUPP;
 645
 646         memset(&link_ksettings, 0, sizeof(link_ksettings));
 647         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 648         if (err < 0)
 649                 return err;
 650         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 651
 652         /* send a sensible cmd tag back to user */
 653         cmd.cmd = ETHTOOL_GSET;
 654
 655         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 656                 return -EFAULT;
 657
 658         return 0;
 659 }
 660
 661 /* Update device link settings with given ethtool_cmd.
 662  *
 663  * Backward compatibility note: for compatibility with legacy ethtool, this is
 664  * now always implemented via set_link_settings. When user's request updates
 665  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 666  * warning is logged once (with name of 1st driver/device) to recommend user to
 667  * upgrade ethtool, and the request is rejected.
 668  */
 669 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 670 {
 671         struct ethtool_link_ksettings link_ksettings;
 672         struct ethtool_cmd cmd;
 673         int ret;
 674
 675         ASSERT_RTNL();
 676
 677         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 678                 return -EFAULT;
 679         if (!dev->ethtool_ops->set_link_ksettings)
 680                 return -EOPNOTSUPP;
 681
 682         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 683                 return -EINVAL;
 684         link_ksettings.base.link_mode_masks_nwords =
 685                 __ETHTOOL_LINK_MODE_MASK_NU32;
 686         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 687         if (ret >= 0) {
 688                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 689                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 690         }
 691         return ret;
 692 }
 693
 694 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 695                                                   void __user *useraddr)
 696 {
 697         struct ethtool_drvinfo info;
 698         const struct ethtool_ops *ops = dev->ethtool_ops;
 699
 700         memset(&info, 0, sizeof(info));
 701         info.cmd = ETHTOOL_GDRVINFO;
 702         strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
 703         if (ops->get_drvinfo) {
 704                 ops->get_drvinfo(dev, &info);
 705         } else if (dev->dev.parent && dev->dev.parent->driver) {
 706                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 707                         sizeof(info.bus_info));
 708                 strlcpy(info.driver, dev->dev.parent->driver->name,
 709                         sizeof(info.driver));
 710         } else {
 711                 return -EOPNOTSUPP;
 712         }
 713
 714         /*
 715          * this method of obtaining string set info is deprecated;
 716          * Use ETHTOOL_GSSET_INFO instead.
 717          */
 718         if (ops->get_sset_count) {
 719                 int rc;
 720
 721                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 722                 if (rc >= 0)
 723                         info.testinfo_len = rc;
 724                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 725                 if (rc >= 0)
 726                         info.n_stats = rc;
 727                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 728                 if (rc >= 0)
 729                         info.n_priv_flags = rc;
 730         }
 731         if (ops->get_regs_len) {
 732                 int ret = ops->get_regs_len(dev);
 733
 734                 if (ret > 0)
 735                         info.regdump_len = ret;
 736         }
 737
 738         if (ops->get_eeprom_len)
 739                 info.eedump_len = ops->get_eeprom_len(dev);
 740
 741         if (!info.fw_version[0])
 742                 devlink_compat_running_version(dev, info.fw_version,
 743                                                sizeof(info.fw_version));
 744
 745         if (copy_to_user(useraddr, &info, sizeof(info)))
 746                 return -EFAULT;
 747         return 0;
 748 }
 749
 750 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 751                                                     void __user *useraddr)
 752 {
 753         struct ethtool_sset_info info;
 754         u64 sset_mask;
 755         int i, idx = 0, n_bits = 0, ret, rc;
 756         u32 *info_buf = NULL;
 757
 758         if (copy_from_user(&info, useraddr, sizeof(info)))
 759                 return -EFAULT;
 760
 761         /* store copy of mask, because we zero struct later on */
 762         sset_mask = info.sset_mask;
 763         if (!sset_mask)
 764                 return 0;
 765
 766         /* calculate size of return buffer */
 767         n_bits = hweight64(sset_mask);
 768
 769         memset(&info, 0, sizeof(info));
 770         info.cmd = ETHTOOL_GSSET_INFO;
 771
 772         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 773         if (!info_buf)
 774                 return -ENOMEM;
 775
 776         /*
 777          * fill return buffer based on input bitmask and successful
 778          * get_sset_count return
 779          */
 780         for (i = 0; i < 64; i++) {
 781                 if (!(sset_mask & (1ULL << i)))
 782                         continue;
 783
 784                 rc = __ethtool_get_sset_count(dev, i);
 785                 if (rc >= 0) {
 786                         info.sset_mask |= (1ULL << i);
 787                         info_buf[idx++] = rc;
 788                 }
 789         }
 790
 791         ret = -EFAULT;
 792         if (copy_to_user(useraddr, &info, sizeof(info)))
 793                 goto out;
 794
 795         useraddr += offsetof(struct ethtool_sset_info, data);
 796         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 797                 goto out;
 798
 799         ret = 0;
 800
 801 out:
 802         kfree(info_buf);
 803         return ret;
 804 }
 805
 806 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 807                                                 u32 cmd, void __user *useraddr)
 808 {
 809         struct ethtool_rxnfc info;
 810         size_t info_size = sizeof(info);
 811         int rc;
 812
 813         if (!dev->ethtool_ops->set_rxnfc)
 814                 return -EOPNOTSUPP;
 815
 816         /* struct ethtool_rxnfc was originally defined for
 817          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 818          * members.  User-space might still be using that
 819          * definition. */
 820         if (cmd == ETHTOOL_SRXFH)
 821                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 822                              sizeof(info.data));
 823
 824         if (copy_from_user(&info, useraddr, info_size))
 825                 return -EFAULT;
 826
 827         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 828         if (rc)
 829                 return rc;
 830
 831         if (cmd == ETHTOOL_SRXCLSRLINS &&
 832             copy_to_user(useraddr, &info, info_size))
 833                 return -EFAULT;
 834
 835         return 0;
 836 }
 837
 838 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 839                                                 u32 cmd, void __user *useraddr)
 840 {
 841         struct ethtool_rxnfc info;
 842         size_t info_size = sizeof(info);
 843         const struct ethtool_ops *ops = dev->ethtool_ops;
 844         int ret;
 845         void *rule_buf = NULL;
 846
 847         if (!ops->get_rxnfc)
 848                 return -EOPNOTSUPP;
 849
 850         /* struct ethtool_rxnfc was originally defined for
 851          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 852          * members.  User-space might still be using that
 853          * definition. */
 854         if (cmd == ETHTOOL_GRXFH)
 855                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 856                              sizeof(info.data));
 857
 858         if (copy_from_user(&info, useraddr, info_size))
 859                 return -EFAULT;
 860
 861         /* If FLOW_RSS was requested then user-space must be using the
 862          * new definition, as FLOW_RSS is newer.
 863          */
 864         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
 865                 info_size = sizeof(info);
 866                 if (copy_from_user(&info, useraddr, info_size))
 867                         return -EFAULT;
 868                 /* Since malicious users may modify the original data,
 869                  * we need to check whether FLOW_RSS is still requested.
 870                  */
 871                 if (!(info.flow_type & FLOW_RSS))
 872                         return -EINVAL;
 873         }
 874
 875         if (info.cmd != cmd)
 876                 return -EINVAL;
 877
 878         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 879                 if (info.rule_cnt > 0) {
 880                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
 881                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
 882                                                    GFP_USER);
 883                         if (!rule_buf)
 884                                 return -ENOMEM;
 885                 }
 886         }
 887
 888         ret = ops->get_rxnfc(dev, &info, rule_buf);
 889         if (ret < 0)
 890                 goto err_out;
 891
 892         ret = -EFAULT;
 893         if (copy_to_user(useraddr, &info, info_size))
 894                 goto err_out;
 895
 896         if (rule_buf) {
 897                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 898                 if (copy_to_user(useraddr, rule_buf,
 899                                  info.rule_cnt * sizeof(u32)))
 900                         goto err_out;
 901         }
 902         ret = 0;
 903
 904 err_out:
 905         kfree(rule_buf);
 906
 907         return ret;
 908 }
 909
 910 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
 911                                         struct ethtool_rxnfc *rx_rings,
 912                                         u32 size)
 913 {
 914         int i;
 915
 916         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
 917                 return -EFAULT;
 918
 919         /* Validate ring indices */
 920         for (i = 0; i < size; i++)
 921                 if (indir[i] >= rx_rings->data)
 922                         return -EINVAL;
 923
 924         return 0;
 925 }
 926
 927 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
 928
 929 void netdev_rss_key_fill(void *buffer, size_t len)
 930 {
 931         BUG_ON(len > sizeof(netdev_rss_key));
 932         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
 933         memcpy(buffer, netdev_rss_key, len);
 934 }
 935 EXPORT_SYMBOL(netdev_rss_key_fill);
 936
 937 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
 938                                                      void __user *useraddr)
 939 {
 940         u32 user_size, dev_size;
 941         u32 *indir;
 942         int ret;
 943
 944         if (!dev->ethtool_ops->get_rxfh_indir_size ||
 945             !dev->ethtool_ops->get_rxfh)
 946                 return -EOPNOTSUPP;
 947         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
 948         if (dev_size == 0)
 949                 return -EOPNOTSUPP;
 950
 951         if (copy_from_user(&user_size,
 952                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 953                            sizeof(user_size)))
 954                 return -EFAULT;
 955
 956         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
 957                          &dev_size, sizeof(dev_size)))
 958                 return -EFAULT;
 959
 960         /* If the user buffer size is 0, this is just a query for the
 961          * device table size.  Otherwise, if it's smaller than the
 962          * device table size it's an error.
 963          */
 964         if (user_size < dev_size)
 965                 return user_size == 0 ? 0 : -EINVAL;
 966
 967         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
 968         if (!indir)
 969                 return -ENOMEM;
 970
 971         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
 972         if (ret)
 973                 goto out;
 974
 975         if (copy_to_user(useraddr +
 976                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
 977                          indir, dev_size * sizeof(indir[0])))
 978                 ret = -EFAULT;
 979
 980 out:
 981         kfree(indir);
 982         return ret;
 983 }
 984
 985 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
 986                                                      void __user *useraddr)
 987 {
 988         struct ethtool_rxnfc rx_rings;
 989         u32 user_size, dev_size, i;
 990         u32 *indir;
 991         const struct ethtool_ops *ops = dev->ethtool_ops;
 992         int ret;
 993         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
 994
 995         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
 996             !ops->get_rxnfc)
 997                 return -EOPNOTSUPP;
 998
 999         dev_size = ops->get_rxfh_indir_size(dev);
1000         if (dev_size == 0)
1001                 return -EOPNOTSUPP;
1002
1003         if (copy_from_user(&user_size,
1004                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1005                            sizeof(user_size)))
1006                 return -EFAULT;
1007
1008         if (user_size != 0 && user_size != dev_size)
1009                 return -EINVAL;
1010
1011         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1012         if (!indir)
1013                 return -ENOMEM;
1014
1015         rx_rings.cmd = ETHTOOL_GRXRINGS;
1016         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1017         if (ret)
1018                 goto out;
1019
1020         if (user_size == 0) {
1021                 for (i = 0; i < dev_size; i++)
1022                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1023         } else {
1024                 ret = ethtool_copy_validate_indir(indir,
1025                                                   useraddr + ringidx_offset,
1026                                                   &rx_rings,
1027                                                   dev_size);
1028                 if (ret)
1029                         goto out;
1030         }
1031
1032         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1033         if (ret)
1034                 goto out;
1035
1036         /* indicate whether rxfh was set to default */
1037         if (user_size == 0)
1038                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1039         else
1040                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1041
1042 out:
1043         kfree(indir);
1044         return ret;
1045 }
1046
1047 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1048                                                void __user *useraddr)
1049 {
1050         int ret;
1051         const struct ethtool_ops *ops = dev->ethtool_ops;
1052         u32 user_indir_size, user_key_size;
1053         u32 dev_indir_size = 0, dev_key_size = 0;
1054         struct ethtool_rxfh rxfh;
1055         u32 total_size;
1056         u32 indir_bytes;
1057         u32 *indir = NULL;
1058         u8 dev_hfunc = 0;
1059         u8 *hkey = NULL;
1060         u8 *rss_config;
1061
1062         if (!ops->get_rxfh)
1063                 return -EOPNOTSUPP;
1064
1065         if (ops->get_rxfh_indir_size)
1066                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1067         if (ops->get_rxfh_key_size)
1068                 dev_key_size = ops->get_rxfh_key_size(dev);
1069
1070         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1071                 return -EFAULT;
1072         user_indir_size = rxfh.indir_size;
1073         user_key_size = rxfh.key_size;
1074
1075         /* Check that reserved fields are 0 for now */
1076         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1077                 return -EINVAL;
1078         /* Most drivers don't handle rss_context, check it's 0 as well */
1079         if (rxfh.rss_context && !ops->get_rxfh_context)
1080                 return -EOPNOTSUPP;
1081
1082         rxfh.indir_size = dev_indir_size;
1083         rxfh.key_size = dev_key_size;
1084         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1085                 return -EFAULT;
1086
1087         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1088             (user_key_size && (user_key_size != dev_key_size)))
1089                 return -EINVAL;
1090
1091         indir_bytes = user_indir_size * sizeof(indir[0]);
1092         total_size = indir_bytes + user_key_size;
1093         rss_config = kzalloc(total_size, GFP_USER);
1094         if (!rss_config)
1095                 return -ENOMEM;
1096
1097         if (user_indir_size)
1098                 indir = (u32 *)rss_config;
1099
1100         if (user_key_size)
1101                 hkey = rss_config + indir_bytes;
1102
1103         if (rxfh.rss_context)
1104                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1105                                                          &dev_hfunc,
1106                                                          rxfh.rss_context);
1107         else
1108                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1109         if (ret)
1110                 goto out;
1111
1112         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1113                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1114                 ret = -EFAULT;
1115         } else if (copy_to_user(useraddr +
1116                               offsetof(struct ethtool_rxfh, rss_config[0]),
1117                               rss_config, total_size)) {
1118                 ret = -EFAULT;
1119         }
1120 out:
1121         kfree(rss_config);
1122
1123         return ret;
1124 }
1125
1126 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1127                                                void __user *useraddr)
1128 {
1129         int ret;
1130         const struct ethtool_ops *ops = dev->ethtool_ops;
1131         struct ethtool_rxnfc rx_rings;
1132         struct ethtool_rxfh rxfh;
1133         u32 dev_indir_size = 0, dev_key_size = 0, i;
1134         u32 *indir = NULL, indir_bytes = 0;
1135         u8 *hkey = NULL;
1136         u8 *rss_config;
1137         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1138         bool delete = false;
1139
1140         if (!ops->get_rxnfc || !ops->set_rxfh)
1141                 return -EOPNOTSUPP;
1142
1143         if (ops->get_rxfh_indir_size)
1144                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1145         if (ops->get_rxfh_key_size)
1146                 dev_key_size = ops->get_rxfh_key_size(dev);
1147
1148         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1149                 return -EFAULT;
1150
1151         /* Check that reserved fields are 0 for now */
1152         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1153                 return -EINVAL;
1154         /* Most drivers don't handle rss_context, check it's 0 as well */
1155         if (rxfh.rss_context && !ops->set_rxfh_context)
1156                 return -EOPNOTSUPP;
1157
1158         /* If either indir, hash key or function is valid, proceed further.
1159          * Must request at least one change: indir size, hash key or function.
1160          */
1161         if ((rxfh.indir_size &&
1162              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1163              rxfh.indir_size != dev_indir_size) ||
1164             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1165             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1166              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1167                 return -EINVAL;
1168
1169         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1170                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1171
1172         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1173         if (!rss_config)
1174                 return -ENOMEM;
1175
1176         rx_rings.cmd = ETHTOOL_GRXRINGS;
1177         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1178         if (ret)
1179                 goto out;
1180
1181         /* rxfh.indir_size == 0 means reset the indir table to default (master
1182          * context) or delete the context (other RSS contexts).
1183          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1184          */
1185         if (rxfh.indir_size &&
1186             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1187                 indir = (u32 *)rss_config;
1188                 ret = ethtool_copy_validate_indir(indir,
1189                                                   useraddr + rss_cfg_offset,
1190                                                   &rx_rings,
1191                                                   rxfh.indir_size);
1192                 if (ret)
1193                         goto out;
1194         } else if (rxfh.indir_size == 0) {
1195                 if (rxfh.rss_context == 0) {
1196                         indir = (u32 *)rss_config;
1197                         for (i = 0; i < dev_indir_size; i++)
1198                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1199                 } else {
1200                         delete = true;
1201                 }
1202         }
1203
1204         if (rxfh.key_size) {
1205                 hkey = rss_config + indir_bytes;
1206                 if (copy_from_user(hkey,
1207                                    useraddr + rss_cfg_offset + indir_bytes,
1208                                    rxfh.key_size)) {
1209                         ret = -EFAULT;
1210                         goto out;
1211                 }
1212         }
1213
1214         if (rxfh.rss_context)
1215                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1216                                             &rxfh.rss_context, delete);
1217         else
1218                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1219         if (ret)
1220                 goto out;
1221
1222         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1223                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1224                 ret = -EFAULT;
1225
1226         if (!rxfh.rss_context) {
1227                 /* indicate whether rxfh was set to default */
1228                 if (rxfh.indir_size == 0)
1229                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1230                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1231                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1232         }
1233
1234 out:
1235         kfree(rss_config);
1236         return ret;
1237 }
1238
1239 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1240 {
1241         struct ethtool_regs regs;
1242         const struct ethtool_ops *ops = dev->ethtool_ops;
1243         void *regbuf;
1244         int reglen, ret;
1245
1246         if (!ops->get_regs || !ops->get_regs_len)
1247                 return -EOPNOTSUPP;
1248
1249         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1250                 return -EFAULT;
1251
1252         reglen = ops->get_regs_len(dev);
1253         if (reglen <= 0)
1254                 return reglen;
1255
1256         if (regs.len > reglen)
1257                 regs.len = reglen;
1258
1259         regbuf = vzalloc(reglen);
1260         if (!regbuf)
1261                 return -ENOMEM;
1262
1263         if (regs.len < reglen)
1264                 reglen = regs.len;
1265
1266         ops->get_regs(dev, &regs, regbuf);
1267
1268         ret = -EFAULT;
1269         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1270                 goto out;
1271         useraddr += offsetof(struct ethtool_regs, data);
1272         if (copy_to_user(useraddr, regbuf, reglen))
1273                 goto out;
1274         ret = 0;
1275
1276  out:
1277         vfree(regbuf);
1278         return ret;
1279 }
1280
1281 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1282 {
1283         struct ethtool_value reset;
1284         int ret;
1285
1286         if (!dev->ethtool_ops->reset)
1287                 return -EOPNOTSUPP;
1288
1289         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1290                 return -EFAULT;
1291
1292         ret = dev->ethtool_ops->reset(dev, &reset.data);
1293         if (ret)
1294                 return ret;
1295
1296         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1297                 return -EFAULT;
1298         return 0;
1299 }
1300
1301 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1302 {
1303         struct ethtool_wolinfo wol;
1304
1305         if (!dev->ethtool_ops->get_wol)
1306                 return -EOPNOTSUPP;
1307
1308         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1309         wol.cmd = ETHTOOL_GWOL;
1310         dev->ethtool_ops->get_wol(dev, &wol);
1311
1312         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1313                 return -EFAULT;
1314         return 0;
1315 }
1316
1317 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1318 {
1319         struct ethtool_wolinfo wol;
1320         int ret;
1321
1322         if (!dev->ethtool_ops->set_wol)
1323                 return -EOPNOTSUPP;
1324
1325         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1326                 return -EFAULT;
1327
1328         ret = dev->ethtool_ops->set_wol(dev, &wol);
1329         if (ret)
1330                 return ret;
1331
1332         dev->wol_enabled = !!wol.wolopts;
1333         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1334
1335         return 0;
1336 }
1337
1338 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1339 {
1340         struct ethtool_eee edata;
1341         int rc;
1342
1343         if (!dev->ethtool_ops->get_eee)
1344                 return -EOPNOTSUPP;
1345
1346         memset(&edata, 0, sizeof(struct ethtool_eee));
1347         edata.cmd = ETHTOOL_GEEE;
1348         rc = dev->ethtool_ops->get_eee(dev, &edata);
1349
1350         if (rc)
1351                 return rc;
1352
1353         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1354                 return -EFAULT;
1355
1356         return 0;
1357 }
1358
1359 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1360 {
1361         struct ethtool_eee edata;
1362         int ret;
1363
1364         if (!dev->ethtool_ops->set_eee)
1365                 return -EOPNOTSUPP;
1366
1367         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1368                 return -EFAULT;
1369
1370         ret = dev->ethtool_ops->set_eee(dev, &edata);
1371         if (!ret)
1372                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1373         return ret;
1374 }
1375
1376 static int ethtool_nway_reset(struct net_device *dev)
1377 {
1378         if (!dev->ethtool_ops->nway_reset)
1379                 return -EOPNOTSUPP;
1380
1381         return dev->ethtool_ops->nway_reset(dev);
1382 }
1383
1384 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1385 {
1386         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1387         int link = __ethtool_get_link(dev);
1388
1389         if (link < 0)
1390                 return link;
1391
1392         edata.data = link;
1393         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1394                 return -EFAULT;
1395         return 0;
1396 }
1397
1398 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1399                                   int (*getter)(struct net_device *,
1400                                                 struct ethtool_eeprom *, u8 *),
1401                                   u32 total_len)
1402 {
1403         struct ethtool_eeprom eeprom;
1404         void __user *userbuf = useraddr + sizeof(eeprom);
1405         u32 bytes_remaining;
1406         u8 *data;
1407         int ret = 0;
1408
1409         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1410                 return -EFAULT;
1411
1412         /* Check for wrap and zero */
1413         if (eeprom.offset + eeprom.len <= eeprom.offset)
1414                 return -EINVAL;
1415
1416         /* Check for exceeding total eeprom len */
1417         if (eeprom.offset + eeprom.len > total_len)
1418                 return -EINVAL;
1419
1420         data = kmalloc(PAGE_SIZE, GFP_USER);
1421         if (!data)
1422                 return -ENOMEM;
1423
1424         bytes_remaining = eeprom.len;
1425         while (bytes_remaining > 0) {
1426                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1427
1428                 ret = getter(dev, &eeprom, data);
1429                 if (ret)
1430                         break;
1431                 if (copy_to_user(userbuf, data, eeprom.len)) {
1432                         ret = -EFAULT;
1433                         break;
1434                 }
1435                 userbuf += eeprom.len;
1436                 eeprom.offset += eeprom.len;
1437                 bytes_remaining -= eeprom.len;
1438         }
1439
1440         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1441         eeprom.offset -= eeprom.len;
1442         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1443                 ret = -EFAULT;
1444
1445         kfree(data);
1446         return ret;
1447 }
1448
1449 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1450 {
1451         const struct ethtool_ops *ops = dev->ethtool_ops;
1452
1453         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1454             !ops->get_eeprom_len(dev))
1455                 return -EOPNOTSUPP;
1456
1457         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1458                                       ops->get_eeprom_len(dev));
1459 }
1460
1461 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1462 {
1463         struct ethtool_eeprom eeprom;
1464         const struct ethtool_ops *ops = dev->ethtool_ops;
1465         void __user *userbuf = useraddr + sizeof(eeprom);
1466         u32 bytes_remaining;
1467         u8 *data;
1468         int ret = 0;
1469
1470         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1471             !ops->get_eeprom_len(dev))
1472                 return -EOPNOTSUPP;
1473
1474         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1475                 return -EFAULT;
1476
1477         /* Check for wrap and zero */
1478         if (eeprom.offset + eeprom.len <= eeprom.offset)
1479                 return -EINVAL;
1480
1481         /* Check for exceeding total eeprom len */
1482         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1483                 return -EINVAL;
1484
1485         data = kmalloc(PAGE_SIZE, GFP_USER);
1486         if (!data)
1487                 return -ENOMEM;
1488
1489         bytes_remaining = eeprom.len;
1490         while (bytes_remaining > 0) {
1491                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1492
1493                 if (copy_from_user(data, userbuf, eeprom.len)) {
1494                         ret = -EFAULT;
1495                         break;
1496                 }
1497                 ret = ops->set_eeprom(dev, &eeprom, data);
1498                 if (ret)
1499                         break;
1500                 userbuf += eeprom.len;
1501                 eeprom.offset += eeprom.len;
1502                 bytes_remaining -= eeprom.len;
1503         }
1504
1505         kfree(data);
1506         return ret;
1507 }
1508
1509 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1510                                                    void __user *useraddr)
1511 {
1512         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1513
1514         if (!dev->ethtool_ops->get_coalesce)
1515                 return -EOPNOTSUPP;
1516
1517         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1518
1519         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1520                 return -EFAULT;
1521         return 0;
1522 }
1523
1524 static bool
1525 ethtool_set_coalesce_supported(struct net_device *dev,
1526                                struct ethtool_coalesce *coalesce)
1527 {
1528         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1529         u32 nonzero_params = 0;
1530
1531         if (coalesce->rx_coalesce_usecs)
1532                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1533         if (coalesce->rx_max_coalesced_frames)
1534                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1535         if (coalesce->rx_coalesce_usecs_irq)
1536                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1537         if (coalesce->rx_max_coalesced_frames_irq)
1538                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1539         if (coalesce->tx_coalesce_usecs)
1540                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1541         if (coalesce->tx_max_coalesced_frames)
1542                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1543         if (coalesce->tx_coalesce_usecs_irq)
1544                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1545         if (coalesce->tx_max_coalesced_frames_irq)
1546                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1547         if (coalesce->stats_block_coalesce_usecs)
1548                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1549         if (coalesce->use_adaptive_rx_coalesce)
1550                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1551         if (coalesce->use_adaptive_tx_coalesce)
1552                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1553         if (coalesce->pkt_rate_low)
1554                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1555         if (coalesce->rx_coalesce_usecs_low)
1556                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1557         if (coalesce->rx_max_coalesced_frames_low)
1558                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1559         if (coalesce->tx_coalesce_usecs_low)
1560                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1561         if (coalesce->tx_max_coalesced_frames_low)
1562                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1563         if (coalesce->pkt_rate_high)
1564                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1565         if (coalesce->rx_coalesce_usecs_high)
1566                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1567         if (coalesce->rx_max_coalesced_frames_high)
1568                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1569         if (coalesce->tx_coalesce_usecs_high)
1570                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1571         if (coalesce->tx_max_coalesced_frames_high)
1572                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1573         if (coalesce->rate_sample_interval)
1574                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1575
1576         return (supported_params & nonzero_params) == nonzero_params;
1577 }
1578
1579 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1580                                                    void __user *useraddr)
1581 {
1582         struct ethtool_coalesce coalesce;
1583         int ret;
1584
1585         if (!dev->ethtool_ops->set_coalesce)
1586                 return -EOPNOTSUPP;
1587
1588         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1589                 return -EFAULT;
1590
1591         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1592                 return -EOPNOTSUPP;
1593
1594         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce);
1595         if (!ret)
1596                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1597         return ret;
1598 }
1599
1600 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1601 {
1602         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1603
1604         if (!dev->ethtool_ops->get_ringparam)
1605                 return -EOPNOTSUPP;
1606
1607         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1608
1609         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1610                 return -EFAULT;
1611         return 0;
1612 }
1613
1614 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1615 {
1616         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1617         int ret;
1618
1619         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1620                 return -EOPNOTSUPP;
1621
1622         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1623                 return -EFAULT;
1624
1625         dev->ethtool_ops->get_ringparam(dev, &max);
1626
1627         /* ensure new ring parameters are within the maximums */
1628         if (ringparam.rx_pending > max.rx_max_pending ||
1629             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1630             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1631             ringparam.tx_pending > max.tx_max_pending)
1632                 return -EINVAL;
1633
1634         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
1635         if (!ret)
1636                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1637         return ret;
1638 }
1639
1640 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1641                                                    void __user *useraddr)
1642 {
1643         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1644
1645         if (!dev->ethtool_ops->get_channels)
1646                 return -EOPNOTSUPP;
1647
1648         dev->ethtool_ops->get_channels(dev, &channels);
1649
1650         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1651                 return -EFAULT;
1652         return 0;
1653 }
1654
1655 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1656                                                    void __user *useraddr)
1657 {
1658         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1659         u16 from_channel, to_channel;
1660         u32 max_rx_in_use = 0;
1661         unsigned int i;
1662         int ret;
1663
1664         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1665                 return -EOPNOTSUPP;
1666
1667         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1668                 return -EFAULT;
1669
1670         dev->ethtool_ops->get_channels(dev, &curr);
1671
1672         /* ensure new counts are within the maximums */
1673         if (channels.rx_count > curr.max_rx ||
1674             channels.tx_count > curr.max_tx ||
1675             channels.combined_count > curr.max_combined ||
1676             channels.other_count > curr.max_other)
1677                 return -EINVAL;
1678
1679         /* ensure the new Rx count fits within the configured Rx flow
1680          * indirection table settings */
1681         if (netif_is_rxfh_configured(dev) &&
1682             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1683             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1684             return -EINVAL;
1685
1686         /* Disabling channels, query zero-copy AF_XDP sockets */
1687         from_channel = channels.combined_count +
1688                 min(channels.rx_count, channels.tx_count);
1689         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1690         for (i = from_channel; i < to_channel; i++)
1691                 if (xdp_get_umem_from_qid(dev, i))
1692                         return -EINVAL;
1693
1694         ret = dev->ethtool_ops->set_channels(dev, &channels);
1695         if (!ret)
1696                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1697         return ret;
1698 }
1699
1700 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1701 {
1702         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1703
1704         if (!dev->ethtool_ops->get_pauseparam)
1705                 return -EOPNOTSUPP;
1706
1707         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1708
1709         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1710                 return -EFAULT;
1711         return 0;
1712 }
1713
1714 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1715 {
1716         struct ethtool_pauseparam pauseparam;
1717         int ret;
1718
1719         if (!dev->ethtool_ops->set_pauseparam)
1720                 return -EOPNOTSUPP;
1721
1722         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1723                 return -EFAULT;
1724
1725         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1726         if (!ret)
1727                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1728         return ret;
1729 }
1730
1731 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1732 {
1733         struct ethtool_test test;
1734         const struct ethtool_ops *ops = dev->ethtool_ops;
1735         u64 *data;
1736         int ret, test_len;
1737
1738         if (!ops->self_test || !ops->get_sset_count)
1739                 return -EOPNOTSUPP;
1740
1741         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1742         if (test_len < 0)
1743                 return test_len;
1744         WARN_ON(test_len == 0);
1745
1746         if (copy_from_user(&test, useraddr, sizeof(test)))
1747                 return -EFAULT;
1748
1749         test.len = test_len;
1750         data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1751         if (!data)
1752                 return -ENOMEM;
1753
1754         netif_testing_on(dev);
1755         ops->self_test(dev, &test, data);
1756         netif_testing_off(dev);
1757
1758         ret = -EFAULT;
1759         if (copy_to_user(useraddr, &test, sizeof(test)))
1760                 goto out;
1761         useraddr += sizeof(test);
1762         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1763                 goto out;
1764         ret = 0;
1765
1766  out:
1767         kfree(data);
1768         return ret;
1769 }
1770
1771 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1772 {
1773         struct ethtool_gstrings gstrings;
1774         u8 *data;
1775         int ret;
1776
1777         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1778                 return -EFAULT;
1779
1780         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1781         if (ret < 0)
1782                 return ret;
1783         if (ret > S32_MAX / ETH_GSTRING_LEN)
1784                 return -ENOMEM;
1785         WARN_ON_ONCE(!ret);
1786
1787         gstrings.len = ret;
1788
1789         if (gstrings.len) {
1790                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1791                 if (!data)
1792                         return -ENOMEM;
1793
1794                 __ethtool_get_strings(dev, gstrings.string_set, data);
1795         } else {
1796                 data = NULL;
1797         }
1798
1799         ret = -EFAULT;
1800         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1801                 goto out;
1802         useraddr += sizeof(gstrings);
1803         if (gstrings.len &&
1804             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1805                 goto out;
1806         ret = 0;
1807
1808 out:
1809         vfree(data);
1810         return ret;
1811 }
1812
1813 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1814 {
1815         struct ethtool_value id;
1816         static bool busy;
1817         const struct ethtool_ops *ops = dev->ethtool_ops;
1818         int rc;
1819
1820         if (!ops->set_phys_id)
1821                 return -EOPNOTSUPP;
1822
1823         if (busy)
1824                 return -EBUSY;
1825
1826         if (copy_from_user(&id, useraddr, sizeof(id)))
1827                 return -EFAULT;
1828
1829         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1830         if (rc < 0)
1831                 return rc;
1832
1833         /* Drop the RTNL lock while waiting, but prevent reentry or
1834          * removal of the device.
1835          */
1836         busy = true;
1837         dev_hold(dev);
1838         rtnl_unlock();
1839
1840         if (rc == 0) {
1841                 /* Driver will handle this itself */
1842                 schedule_timeout_interruptible(
1843                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1844         } else {
1845                 /* Driver expects to be called at twice the frequency in rc */
1846                 int n = rc * 2, i, interval = HZ / n;
1847
1848                 /* Count down seconds */
1849                 do {
1850                         /* Count down iterations per second */
1851                         i = n;
1852                         do {
1853                                 rtnl_lock();
1854                                 rc = ops->set_phys_id(dev,
1855                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1856                                 rtnl_unlock();
1857                                 if (rc)
1858                                         break;
1859                                 schedule_timeout_interruptible(interval);
1860                         } while (!signal_pending(current) && --i != 0);
1861                 } while (!signal_pending(current) &&
1862                          (id.data == 0 || --id.data != 0));
1863         }
1864
1865         rtnl_lock();
1866         dev_put(dev);
1867         busy = false;
1868
1869         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1870         return rc;
1871 }
1872
1873 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1874 {
1875         struct ethtool_stats stats;
1876         const struct ethtool_ops *ops = dev->ethtool_ops;
1877         u64 *data;
1878         int ret, n_stats;
1879
1880         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1881                 return -EOPNOTSUPP;
1882
1883         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1884         if (n_stats < 0)
1885                 return n_stats;
1886         if (n_stats > S32_MAX / sizeof(u64))
1887                 return -ENOMEM;
1888         WARN_ON_ONCE(!n_stats);
1889         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1890                 return -EFAULT;
1891
1892         stats.n_stats = n_stats;
1893
1894         if (n_stats) {
1895                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1896                 if (!data)
1897                         return -ENOMEM;
1898                 ops->get_ethtool_stats(dev, &stats, data);
1899         } else {
1900                 data = NULL;
1901         }
1902
1903         ret = -EFAULT;
1904         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1905                 goto out;
1906         useraddr += sizeof(stats);
1907         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1908                 goto out;
1909         ret = 0;
1910
1911  out:
1912         vfree(data);
1913         return ret;
1914 }
1915
1916 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1917 {
1918         const struct ethtool_ops *ops = dev->ethtool_ops;
1919         struct phy_device *phydev = dev->phydev;
1920         struct ethtool_stats stats;
1921         u64 *data;
1922         int ret, n_stats;
1923
1924         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1925                 return -EOPNOTSUPP;
1926
1927         if (dev->phydev && !ops->get_ethtool_phy_stats)
1928                 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1929         else
1930                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1931         if (n_stats < 0)
1932                 return n_stats;
1933         if (n_stats > S32_MAX / sizeof(u64))
1934                 return -ENOMEM;
1935         WARN_ON_ONCE(!n_stats);
1936
1937         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1938                 return -EFAULT;
1939
1940         stats.n_stats = n_stats;
1941
1942         if (n_stats) {
1943                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1944                 if (!data)
1945                         return -ENOMEM;
1946
1947                 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1948                         ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1949                         if (ret < 0)
1950                                 goto out;
1951                 } else {
1952                         ops->get_ethtool_phy_stats(dev, &stats, data);
1953                 }
1954         } else {
1955                 data = NULL;
1956         }
1957
1958         ret = -EFAULT;
1959         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1960                 goto out;
1961         useraddr += sizeof(stats);
1962         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1963                 goto out;
1964         ret = 0;
1965
1966  out:
1967         vfree(data);
1968         return ret;
1969 }
1970
1971 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1972 {
1973         struct ethtool_perm_addr epaddr;
1974
1975         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1976                 return -EFAULT;
1977
1978         if (epaddr.size < dev->addr_len)
1979                 return -ETOOSMALL;
1980         epaddr.size = dev->addr_len;
1981
1982         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1983                 return -EFAULT;
1984         useraddr += sizeof(epaddr);
1985         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1986                 return -EFAULT;
1987         return 0;
1988 }
1989
1990 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1991                              u32 cmd, u32 (*actor)(struct net_device *))
1992 {
1993         struct ethtool_value edata = { .cmd = cmd };
1994
1995         if (!actor)
1996                 return -EOPNOTSUPP;
1997
1998         edata.data = actor(dev);
1999
2000         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2001                 return -EFAULT;
2002         return 0;
2003 }
2004
2005 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2006                              void (*actor)(struct net_device *, u32))
2007 {
2008         struct ethtool_value edata;
2009
2010         if (!actor)
2011                 return -EOPNOTSUPP;
2012
2013         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2014                 return -EFAULT;
2015
2016         actor(dev, edata.data);
2017         return 0;
2018 }
2019
2020 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2021                              int (*actor)(struct net_device *, u32))
2022 {
2023         struct ethtool_value edata;
2024
2025         if (!actor)
2026                 return -EOPNOTSUPP;
2027
2028         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2029                 return -EFAULT;
2030
2031         return actor(dev, edata.data);
2032 }
2033
2034 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2035                                                    char __user *useraddr)
2036 {
2037         struct ethtool_flash efl;
2038
2039         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2040                 return -EFAULT;
2041         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2042
2043         if (!dev->ethtool_ops->flash_device)
2044                 return devlink_compat_flash_update(dev, efl.data);
2045
2046         return dev->ethtool_ops->flash_device(dev, &efl);
2047 }
2048
2049 static int ethtool_set_dump(struct net_device *dev,
2050                         void __user *useraddr)
2051 {
2052         struct ethtool_dump dump;
2053
2054         if (!dev->ethtool_ops->set_dump)
2055                 return -EOPNOTSUPP;
2056
2057         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2058                 return -EFAULT;
2059
2060         return dev->ethtool_ops->set_dump(dev, &dump);
2061 }
2062
2063 static int ethtool_get_dump_flag(struct net_device *dev,
2064                                 void __user *useraddr)
2065 {
2066         int ret;
2067         struct ethtool_dump dump;
2068         const struct ethtool_ops *ops = dev->ethtool_ops;
2069
2070         if (!ops->get_dump_flag)
2071                 return -EOPNOTSUPP;
2072
2073         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2074                 return -EFAULT;
2075
2076         ret = ops->get_dump_flag(dev, &dump);
2077         if (ret)
2078                 return ret;
2079
2080         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2081                 return -EFAULT;
2082         return 0;
2083 }
2084
2085 static int ethtool_get_dump_data(struct net_device *dev,
2086                                 void __user *useraddr)
2087 {
2088         int ret;
2089         __u32 len;
2090         struct ethtool_dump dump, tmp;
2091         const struct ethtool_ops *ops = dev->ethtool_ops;
2092         void *data = NULL;
2093
2094         if (!ops->get_dump_data || !ops->get_dump_flag)
2095                 return -EOPNOTSUPP;
2096
2097         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2098                 return -EFAULT;
2099
2100         memset(&tmp, 0, sizeof(tmp));
2101         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2102         ret = ops->get_dump_flag(dev, &tmp);
2103         if (ret)
2104                 return ret;
2105
2106         len = min(tmp.len, dump.len);
2107         if (!len)
2108                 return -EFAULT;
2109
2110         /* Don't ever let the driver think there's more space available
2111          * than it requested with .get_dump_flag().
2112          */
2113         dump.len = len;
2114
2115         /* Always allocate enough space to hold the whole thing so that the
2116          * driver does not need to check the length and bother with partial
2117          * dumping.
2118          */
2119         data = vzalloc(tmp.len);
2120         if (!data)
2121                 return -ENOMEM;
2122         ret = ops->get_dump_data(dev, &dump, data);
2123         if (ret)
2124                 goto out;
2125
2126         /* There are two sane possibilities:
2127          * 1. The driver's .get_dump_data() does not touch dump.len.
2128          * 2. Or it may set dump.len to how much it really writes, which
2129          *    should be tmp.len (or len if it can do a partial dump).
2130          * In any case respond to userspace with the actual length of data
2131          * it's receiving.
2132          */
2133         WARN_ON(dump.len != len && dump.len != tmp.len);
2134         dump.len = len;
2135
2136         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2137                 ret = -EFAULT;
2138                 goto out;
2139         }
2140         useraddr += offsetof(struct ethtool_dump, data);
2141         if (copy_to_user(useraddr, data, len))
2142                 ret = -EFAULT;
2143 out:
2144         vfree(data);
2145         return ret;
2146 }
2147
2148 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2149 {
2150         struct ethtool_ts_info info;
2151         int err;
2152
2153         err = __ethtool_get_ts_info(dev, &info);
2154         if (err)
2155                 return err;
2156
2157         if (copy_to_user(useraddr, &info, sizeof(info)))
2158                 return -EFAULT;
2159
2160         return 0;
2161 }
2162
2163 static int __ethtool_get_module_info(struct net_device *dev,
2164                                      struct ethtool_modinfo *modinfo)
2165 {
2166         const struct ethtool_ops *ops = dev->ethtool_ops;
2167         struct phy_device *phydev = dev->phydev;
2168
2169         if (dev->sfp_bus)
2170                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2171
2172         if (phydev && phydev->drv && phydev->drv->module_info)
2173                 return phydev->drv->module_info(phydev, modinfo);
2174
2175         if (ops->get_module_info)
2176                 return ops->get_module_info(dev, modinfo);
2177
2178         return -EOPNOTSUPP;
2179 }
2180
2181 static int ethtool_get_module_info(struct net_device *dev,
2182                                    void __user *useraddr)
2183 {
2184         int ret;
2185         struct ethtool_modinfo modinfo;
2186
2187         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2188                 return -EFAULT;
2189
2190         ret = __ethtool_get_module_info(dev, &modinfo);
2191         if (ret)
2192                 return ret;
2193
2194         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2195                 return -EFAULT;
2196
2197         return 0;
2198 }
2199
2200 static int __ethtool_get_module_eeprom(struct net_device *dev,
2201                                        struct ethtool_eeprom *ee, u8 *data)
2202 {
2203         const struct ethtool_ops *ops = dev->ethtool_ops;
2204         struct phy_device *phydev = dev->phydev;
2205
2206         if (dev->sfp_bus)
2207                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2208
2209         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2210                 return phydev->drv->module_eeprom(phydev, ee, data);
2211
2212         if (ops->get_module_eeprom)
2213                 return ops->get_module_eeprom(dev, ee, data);
2214
2215         return -EOPNOTSUPP;
2216 }
2217
2218 static int ethtool_get_module_eeprom(struct net_device *dev,
2219                                      void __user *useraddr)
2220 {
2221         int ret;
2222         struct ethtool_modinfo modinfo;
2223
2224         ret = __ethtool_get_module_info(dev, &modinfo);
2225         if (ret)
2226                 return ret;
2227
2228         return ethtool_get_any_eeprom(dev, useraddr,
2229                                       __ethtool_get_module_eeprom,
2230                                       modinfo.eeprom_len);
2231 }
2232
2233 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2234 {
2235         switch (tuna->id) {
2236         case ETHTOOL_RX_COPYBREAK:
2237         case ETHTOOL_TX_COPYBREAK:
2238                 if (tuna->len != sizeof(u32) ||
2239                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2240                         return -EINVAL;
2241                 break;
2242         case ETHTOOL_PFC_PREVENTION_TOUT:
2243                 if (tuna->len != sizeof(u16) ||
2244                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2245                         return -EINVAL;
2246                 break;
2247         default:
2248                 return -EINVAL;
2249         }
2250
2251         return 0;
2252 }
2253
2254 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2255 {
2256         int ret;
2257         struct ethtool_tunable tuna;
2258         const struct ethtool_ops *ops = dev->ethtool_ops;
2259         void *data;
2260
2261         if (!ops->get_tunable)
2262                 return -EOPNOTSUPP;
2263         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2264                 return -EFAULT;
2265         ret = ethtool_tunable_valid(&tuna);
2266         if (ret)
2267                 return ret;
2268         data = kmalloc(tuna.len, GFP_USER);
2269         if (!data)
2270                 return -ENOMEM;
2271         ret = ops->get_tunable(dev, &tuna, data);
2272         if (ret)
2273                 goto out;
2274         useraddr += sizeof(tuna);
2275         ret = -EFAULT;
2276         if (copy_to_user(useraddr, data, tuna.len))
2277                 goto out;
2278         ret = 0;
2279
2280 out:
2281         kfree(data);
2282         return ret;
2283 }
2284
2285 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2286 {
2287         int ret;
2288         struct ethtool_tunable tuna;
2289         const struct ethtool_ops *ops = dev->ethtool_ops;
2290         void *data;
2291
2292         if (!ops->set_tunable)
2293                 return -EOPNOTSUPP;
2294         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2295                 return -EFAULT;
2296         ret = ethtool_tunable_valid(&tuna);
2297         if (ret)
2298                 return ret;
2299         useraddr += sizeof(tuna);
2300         data = memdup_user(useraddr, tuna.len);
2301         if (IS_ERR(data))
2302                 return PTR_ERR(data);
2303         ret = ops->set_tunable(dev, &tuna, data);
2304
2305         kfree(data);
2306         return ret;
2307 }
2308
2309 static noinline_for_stack int
2310 ethtool_get_per_queue_coalesce(struct net_device *dev,
2311                                void __user *useraddr,
2312                                struct ethtool_per_queue_op *per_queue_opt)
2313 {
2314         u32 bit;
2315         int ret;
2316         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2317
2318         if (!dev->ethtool_ops->get_per_queue_coalesce)
2319                 return -EOPNOTSUPP;
2320
2321         useraddr += sizeof(*per_queue_opt);
2322
2323         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2324                           MAX_NUM_QUEUE);
2325
2326         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2327                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2328
2329                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2330                 if (ret != 0)
2331                         return ret;
2332                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2333                         return -EFAULT;
2334                 useraddr += sizeof(coalesce);
2335         }
2336
2337         return 0;
2338 }
2339
2340 static noinline_for_stack int
2341 ethtool_set_per_queue_coalesce(struct net_device *dev,
2342                                void __user *useraddr,
2343                                struct ethtool_per_queue_op *per_queue_opt)
2344 {
2345         u32 bit;
2346         int i, ret = 0;
2347         int n_queue;
2348         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2349         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2350
2351         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2352             (!dev->ethtool_ops->get_per_queue_coalesce))
2353                 return -EOPNOTSUPP;
2354
2355         useraddr += sizeof(*per_queue_opt);
2356
2357         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2358         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2359         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2360         if (!backup)
2361                 return -ENOMEM;
2362
2363         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2364                 struct ethtool_coalesce coalesce;
2365
2366                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2367                 if (ret != 0)
2368                         goto roll_back;
2369
2370                 tmp++;
2371
2372                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2373                         ret = -EFAULT;
2374                         goto roll_back;
2375                 }
2376
2377                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2378                         ret = -EOPNOTSUPP;
2379                         goto roll_back;
2380                 }
2381
2382                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2383                 if (ret != 0)
2384                         goto roll_back;
2385
2386                 useraddr += sizeof(coalesce);
2387         }
2388
2389 roll_back:
2390         if (ret != 0) {
2391                 tmp = backup;
2392                 for_each_set_bit(i, queue_mask, bit) {
2393                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2394                         tmp++;
2395                 }
2396         }
2397         kfree(backup);
2398
2399         return ret;
2400 }
2401
2402 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2403                                  void __user *useraddr, u32 sub_cmd)
2404 {
2405         struct ethtool_per_queue_op per_queue_opt;
2406
2407         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2408                 return -EFAULT;
2409
2410         if (per_queue_opt.sub_command != sub_cmd)
2411                 return -EINVAL;
2412
2413         switch (per_queue_opt.sub_command) {
2414         case ETHTOOL_GCOALESCE:
2415                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2416         case ETHTOOL_SCOALESCE:
2417                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2418         default:
2419                 return -EOPNOTSUPP;
2420         };
2421 }
2422
2423 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2424 {
2425         switch (tuna->id) {
2426         case ETHTOOL_PHY_DOWNSHIFT:
2427         case ETHTOOL_PHY_FAST_LINK_DOWN:
2428                 if (tuna->len != sizeof(u8) ||
2429                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2430                         return -EINVAL;
2431                 break;
2432         case ETHTOOL_PHY_EDPD:
2433                 if (tuna->len != sizeof(u16) ||
2434                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2435                         return -EINVAL;
2436                 break;
2437         default:
2438                 return -EINVAL;
2439         }
2440
2441         return 0;
2442 }
2443
2444 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2445 {
2446         int ret;
2447         struct ethtool_tunable tuna;
2448         struct phy_device *phydev = dev->phydev;
2449         void *data;
2450
2451         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2452                 return -EOPNOTSUPP;
2453
2454         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2455                 return -EFAULT;
2456         ret = ethtool_phy_tunable_valid(&tuna);
2457         if (ret)
2458                 return ret;
2459         data = kmalloc(tuna.len, GFP_USER);
2460         if (!data)
2461                 return -ENOMEM;
2462         mutex_lock(&phydev->lock);
2463         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2464         mutex_unlock(&phydev->lock);
2465         if (ret)
2466                 goto out;
2467         useraddr += sizeof(tuna);
2468         ret = -EFAULT;
2469         if (copy_to_user(useraddr, data, tuna.len))
2470                 goto out;
2471         ret = 0;
2472
2473 out:
2474         kfree(data);
2475         return ret;
2476 }
2477
2478 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2479 {
2480         int ret;
2481         struct ethtool_tunable tuna;
2482         struct phy_device *phydev = dev->phydev;
2483         void *data;
2484
2485         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2486                 return -EOPNOTSUPP;
2487         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2488                 return -EFAULT;
2489         ret = ethtool_phy_tunable_valid(&tuna);
2490         if (ret)
2491                 return ret;
2492         useraddr += sizeof(tuna);
2493         data = memdup_user(useraddr, tuna.len);
2494         if (IS_ERR(data))
2495                 return PTR_ERR(data);
2496         mutex_lock(&phydev->lock);
2497         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2498         mutex_unlock(&phydev->lock);
2499
2500         kfree(data);
2501         return ret;
2502 }
2503
2504 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2505 {
2506         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2507         int rc;
2508
2509         if (!dev->ethtool_ops->get_fecparam)
2510                 return -EOPNOTSUPP;
2511
2512         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2513         if (rc)
2514                 return rc;
2515
2516         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2517                 return -EFAULT;
2518         return 0;
2519 }
2520
2521 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2522 {
2523         struct ethtool_fecparam fecparam;
2524
2525         if (!dev->ethtool_ops->set_fecparam)
2526                 return -EOPNOTSUPP;
2527
2528         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2529                 return -EFAULT;
2530
2531         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2532 }
2533
2534 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2535
2536 int dev_ethtool(struct net *net, struct ifreq *ifr)
2537 {
2538         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2539         void __user *useraddr = ifr->ifr_data;
2540         u32 ethcmd, sub_cmd;
2541         int rc;
2542         netdev_features_t old_features;
2543
2544         if (!dev || !netif_device_present(dev))
2545                 return -ENODEV;
2546
2547         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2548                 return -EFAULT;
2549
2550         if (ethcmd == ETHTOOL_PERQUEUE) {
2551                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2552                         return -EFAULT;
2553         } else {
2554                 sub_cmd = ethcmd;
2555         }
2556         /* Allow some commands to be done by anyone */
2557         switch (sub_cmd) {
2558         case ETHTOOL_GSET:
2559         case ETHTOOL_GDRVINFO:
2560         case ETHTOOL_GMSGLVL:
2561         case ETHTOOL_GLINK:
2562         case ETHTOOL_GCOALESCE:
2563         case ETHTOOL_GRINGPARAM:
2564         case ETHTOOL_GPAUSEPARAM:
2565         case ETHTOOL_GRXCSUM:
2566         case ETHTOOL_GTXCSUM:
2567         case ETHTOOL_GSG:
2568         case ETHTOOL_GSSET_INFO:
2569         case ETHTOOL_GSTRINGS:
2570         case ETHTOOL_GSTATS:
2571         case ETHTOOL_GPHYSTATS:
2572         case ETHTOOL_GTSO:
2573         case ETHTOOL_GPERMADDR:
2574         case ETHTOOL_GUFO:
2575         case ETHTOOL_GGSO:
2576         case ETHTOOL_GGRO:
2577         case ETHTOOL_GFLAGS:
2578         case ETHTOOL_GPFLAGS:
2579         case ETHTOOL_GRXFH:
2580         case ETHTOOL_GRXRINGS:
2581         case ETHTOOL_GRXCLSRLCNT:
2582         case ETHTOOL_GRXCLSRULE:
2583         case ETHTOOL_GRXCLSRLALL:
2584         case ETHTOOL_GRXFHINDIR:
2585         case ETHTOOL_GRSSH:
2586         case ETHTOOL_GFEATURES:
2587         case ETHTOOL_GCHANNELS:
2588         case ETHTOOL_GET_TS_INFO:
2589         case ETHTOOL_GEEE:
2590         case ETHTOOL_GTUNABLE:
2591         case ETHTOOL_PHY_GTUNABLE:
2592         case ETHTOOL_GLINKSETTINGS:
2593         case ETHTOOL_GFECPARAM:
2594                 break;
2595         default:
2596                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2597                         return -EPERM;
2598         }
2599
2600         if (dev->ethtool_ops->begin) {
2601                 rc = dev->ethtool_ops->begin(dev);
2602                 if (rc  < 0)
2603                         return rc;
2604         }
2605         old_features = dev->features;
2606
2607         switch (ethcmd) {
2608         case ETHTOOL_GSET:
2609                 rc = ethtool_get_settings(dev, useraddr);
2610                 break;
2611         case ETHTOOL_SSET:
2612                 rc = ethtool_set_settings(dev, useraddr);
2613                 break;
2614         case ETHTOOL_GDRVINFO:
2615                 rc = ethtool_get_drvinfo(dev, useraddr);
2616                 break;
2617         case ETHTOOL_GREGS:
2618                 rc = ethtool_get_regs(dev, useraddr);
2619                 break;
2620         case ETHTOOL_GWOL:
2621                 rc = ethtool_get_wol(dev, useraddr);
2622                 break;
2623         case ETHTOOL_SWOL:
2624                 rc = ethtool_set_wol(dev, useraddr);
2625                 break;
2626         case ETHTOOL_GMSGLVL:
2627                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2628                                        dev->ethtool_ops->get_msglevel);
2629                 break;
2630         case ETHTOOL_SMSGLVL:
2631                 rc = ethtool_set_value_void(dev, useraddr,
2632                                        dev->ethtool_ops->set_msglevel);
2633                 if (!rc)
2634                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2635                 break;
2636         case ETHTOOL_GEEE:
2637                 rc = ethtool_get_eee(dev, useraddr);
2638                 break;
2639         case ETHTOOL_SEEE:
2640                 rc = ethtool_set_eee(dev, useraddr);
2641                 break;
2642         case ETHTOOL_NWAY_RST:
2643                 rc = ethtool_nway_reset(dev);
2644                 break;
2645         case ETHTOOL_GLINK:
2646                 rc = ethtool_get_link(dev, useraddr);
2647                 break;
2648         case ETHTOOL_GEEPROM:
2649                 rc = ethtool_get_eeprom(dev, useraddr);
2650                 break;
2651         case ETHTOOL_SEEPROM:
2652                 rc = ethtool_set_eeprom(dev, useraddr);
2653                 break;
2654         case ETHTOOL_GCOALESCE:
2655                 rc = ethtool_get_coalesce(dev, useraddr);
2656                 break;
2657         case ETHTOOL_SCOALESCE:
2658                 rc = ethtool_set_coalesce(dev, useraddr);
2659                 break;
2660         case ETHTOOL_GRINGPARAM:
2661                 rc = ethtool_get_ringparam(dev, useraddr);
2662                 break;
2663         case ETHTOOL_SRINGPARAM:
2664                 rc = ethtool_set_ringparam(dev, useraddr);
2665                 break;
2666         case ETHTOOL_GPAUSEPARAM:
2667                 rc = ethtool_get_pauseparam(dev, useraddr);
2668                 break;
2669         case ETHTOOL_SPAUSEPARAM:
2670                 rc = ethtool_set_pauseparam(dev, useraddr);
2671                 break;
2672         case ETHTOOL_TEST:
2673                 rc = ethtool_self_test(dev, useraddr);
2674                 break;
2675         case ETHTOOL_GSTRINGS:
2676                 rc = ethtool_get_strings(dev, useraddr);
2677                 break;
2678         case ETHTOOL_PHYS_ID:
2679                 rc = ethtool_phys_id(dev, useraddr);
2680                 break;
2681         case ETHTOOL_GSTATS:
2682                 rc = ethtool_get_stats(dev, useraddr);
2683                 break;
2684         case ETHTOOL_GPERMADDR:
2685                 rc = ethtool_get_perm_addr(dev, useraddr);
2686                 break;
2687         case ETHTOOL_GFLAGS:
2688                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2689                                         __ethtool_get_flags);
2690                 break;
2691         case ETHTOOL_SFLAGS:
2692                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2693                 break;
2694         case ETHTOOL_GPFLAGS:
2695                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2696                                        dev->ethtool_ops->get_priv_flags);
2697                 if (!rc)
2698                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2699                 break;
2700         case ETHTOOL_SPFLAGS:
2701                 rc = ethtool_set_value(dev, useraddr,
2702                                        dev->ethtool_ops->set_priv_flags);
2703                 break;
2704         case ETHTOOL_GRXFH:
2705         case ETHTOOL_GRXRINGS:
2706         case ETHTOOL_GRXCLSRLCNT:
2707         case ETHTOOL_GRXCLSRULE:
2708         case ETHTOOL_GRXCLSRLALL:
2709                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2710                 break;
2711         case ETHTOOL_SRXFH:
2712         case ETHTOOL_SRXCLSRLDEL:
2713         case ETHTOOL_SRXCLSRLINS:
2714                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2715                 break;
2716         case ETHTOOL_FLASHDEV:
2717                 rc = ethtool_flash_device(dev, useraddr);
2718                 break;
2719         case ETHTOOL_RESET:
2720                 rc = ethtool_reset(dev, useraddr);
2721                 break;
2722         case ETHTOOL_GSSET_INFO:
2723                 rc = ethtool_get_sset_info(dev, useraddr);
2724                 break;
2725         case ETHTOOL_GRXFHINDIR:
2726                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2727                 break;
2728         case ETHTOOL_SRXFHINDIR:
2729                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2730                 break;
2731         case ETHTOOL_GRSSH:
2732                 rc = ethtool_get_rxfh(dev, useraddr);
2733                 break;
2734         case ETHTOOL_SRSSH:
2735                 rc = ethtool_set_rxfh(dev, useraddr);
2736                 break;
2737         case ETHTOOL_GFEATURES:
2738                 rc = ethtool_get_features(dev, useraddr);
2739                 break;
2740         case ETHTOOL_SFEATURES:
2741                 rc = ethtool_set_features(dev, useraddr);
2742                 break;
2743         case ETHTOOL_GTXCSUM:
2744         case ETHTOOL_GRXCSUM:
2745         case ETHTOOL_GSG:
2746         case ETHTOOL_GTSO:
2747         case ETHTOOL_GGSO:
2748         case ETHTOOL_GGRO:
2749                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2750                 break;
2751         case ETHTOOL_STXCSUM:
2752         case ETHTOOL_SRXCSUM:
2753         case ETHTOOL_SSG:
2754         case ETHTOOL_STSO:
2755         case ETHTOOL_SGSO:
2756         case ETHTOOL_SGRO:
2757                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2758                 break;
2759         case ETHTOOL_GCHANNELS:
2760                 rc = ethtool_get_channels(dev, useraddr);
2761                 break;
2762         case ETHTOOL_SCHANNELS:
2763                 rc = ethtool_set_channels(dev, useraddr);
2764                 break;
2765         case ETHTOOL_SET_DUMP:
2766                 rc = ethtool_set_dump(dev, useraddr);
2767                 break;
2768         case ETHTOOL_GET_DUMP_FLAG:
2769                 rc = ethtool_get_dump_flag(dev, useraddr);
2770                 break;
2771         case ETHTOOL_GET_DUMP_DATA:
2772                 rc = ethtool_get_dump_data(dev, useraddr);
2773                 break;
2774         case ETHTOOL_GET_TS_INFO:
2775                 rc = ethtool_get_ts_info(dev, useraddr);
2776                 break;
2777         case ETHTOOL_GMODULEINFO:
2778                 rc = ethtool_get_module_info(dev, useraddr);
2779                 break;
2780         case ETHTOOL_GMODULEEEPROM:
2781                 rc = ethtool_get_module_eeprom(dev, useraddr);
2782                 break;
2783         case ETHTOOL_GTUNABLE:
2784                 rc = ethtool_get_tunable(dev, useraddr);
2785                 break;
2786         case ETHTOOL_STUNABLE:
2787                 rc = ethtool_set_tunable(dev, useraddr);
2788                 break;
2789         case ETHTOOL_GPHYSTATS:
2790                 rc = ethtool_get_phy_stats(dev, useraddr);
2791                 break;
2792         case ETHTOOL_PERQUEUE:
2793                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2794                 break;
2795         case ETHTOOL_GLINKSETTINGS:
2796                 rc = ethtool_get_link_ksettings(dev, useraddr);
2797                 break;
2798         case ETHTOOL_SLINKSETTINGS:
2799                 rc = ethtool_set_link_ksettings(dev, useraddr);
2800                 break;
2801         case ETHTOOL_PHY_GTUNABLE:
2802                 rc = get_phy_tunable(dev, useraddr);
2803                 break;
2804         case ETHTOOL_PHY_STUNABLE:
2805                 rc = set_phy_tunable(dev, useraddr);
2806                 break;
2807         case ETHTOOL_GFECPARAM:
2808                 rc = ethtool_get_fecparam(dev, useraddr);
2809                 break;
2810         case ETHTOOL_SFECPARAM:
2811                 rc = ethtool_set_fecparam(dev, useraddr);
2812                 break;
2813         default:
2814                 rc = -EOPNOTSUPP;
2815         }
2816
2817         if (dev->ethtool_ops->complete)
2818                 dev->ethtool_ops->complete(dev);
2819
2820         if (old_features != dev->features)
2821                 netdev_features_change(dev);
2822
2823         return rc;
2824 }
2825
2826 struct ethtool_rx_flow_key {
2827         struct flow_dissector_key_basic                 basic;
2828         union {
2829                 struct flow_dissector_key_ipv4_addrs    ipv4;
2830                 struct flow_dissector_key_ipv6_addrs    ipv6;
2831         };
2832         struct flow_dissector_key_ports                 tp;
2833         struct flow_dissector_key_ip                    ip;
2834         struct flow_dissector_key_vlan                  vlan;
2835         struct flow_dissector_key_eth_addrs             eth_addrs;
2836 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2837
2838 struct ethtool_rx_flow_match {
2839         struct flow_dissector           dissector;
2840         struct ethtool_rx_flow_key      key;
2841         struct ethtool_rx_flow_key      mask;
2842 };
2843
2844 struct ethtool_rx_flow_rule *
2845 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2846 {
2847         const struct ethtool_rx_flow_spec *fs = input->fs;
2848         static struct in6_addr zero_addr = {};
2849         struct ethtool_rx_flow_match *match;
2850         struct ethtool_rx_flow_rule *flow;
2851         struct flow_action_entry *act;
2852
2853         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2854                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2855         if (!flow)
2856                 return ERR_PTR(-ENOMEM);
2857
2858         /* ethtool_rx supports only one single action per rule. */
2859         flow->rule = flow_rule_alloc(1);
2860         if (!flow->rule) {
2861                 kfree(flow);
2862                 return ERR_PTR(-ENOMEM);
2863         }
2864
2865         match = (struct ethtool_rx_flow_match *)flow->priv;
2866         flow->rule->match.dissector     = &match->dissector;
2867         flow->rule->match.mask          = &match->mask;
2868         flow->rule->match.key           = &match->key;
2869
2870         match->mask.basic.n_proto = htons(0xffff);
2871
2872         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2873         case ETHER_FLOW: {
2874                 const struct ethhdr *ether_spec, *ether_m_spec;
2875
2876                 ether_spec = &fs->h_u.ether_spec;
2877                 ether_m_spec = &fs->m_u.ether_spec;
2878
2879                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
2880                         ether_addr_copy(match->key.eth_addrs.src,
2881                                         ether_spec->h_source);
2882                         ether_addr_copy(match->mask.eth_addrs.src,
2883                                         ether_m_spec->h_source);
2884                 }
2885                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
2886                         ether_addr_copy(match->key.eth_addrs.dst,
2887                                         ether_spec->h_dest);
2888                         ether_addr_copy(match->mask.eth_addrs.dst,
2889                                         ether_m_spec->h_dest);
2890                 }
2891                 if (ether_m_spec->h_proto) {
2892                         match->key.basic.n_proto = ether_spec->h_proto;
2893                         match->mask.basic.n_proto = ether_m_spec->h_proto;
2894                 }
2895                 }
2896                 break;
2897         case TCP_V4_FLOW:
2898         case UDP_V4_FLOW: {
2899                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2900
2901                 match->key.basic.n_proto = htons(ETH_P_IP);
2902
2903                 v4_spec = &fs->h_u.tcp_ip4_spec;
2904                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2905
2906                 if (v4_m_spec->ip4src) {
2907                         match->key.ipv4.src = v4_spec->ip4src;
2908                         match->mask.ipv4.src = v4_m_spec->ip4src;
2909                 }
2910                 if (v4_m_spec->ip4dst) {
2911                         match->key.ipv4.dst = v4_spec->ip4dst;
2912                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
2913                 }
2914                 if (v4_m_spec->ip4src ||
2915                     v4_m_spec->ip4dst) {
2916                         match->dissector.used_keys |=
2917                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2918                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2919                                 offsetof(struct ethtool_rx_flow_key, ipv4);
2920                 }
2921                 if (v4_m_spec->psrc) {
2922                         match->key.tp.src = v4_spec->psrc;
2923                         match->mask.tp.src = v4_m_spec->psrc;
2924                 }
2925                 if (v4_m_spec->pdst) {
2926                         match->key.tp.dst = v4_spec->pdst;
2927                         match->mask.tp.dst = v4_m_spec->pdst;
2928                 }
2929                 if (v4_m_spec->psrc ||
2930                     v4_m_spec->pdst) {
2931                         match->dissector.used_keys |=
2932                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2933                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2934                                 offsetof(struct ethtool_rx_flow_key, tp);
2935                 }
2936                 if (v4_m_spec->tos) {
2937                         match->key.ip.tos = v4_spec->tos;
2938                         match->mask.ip.tos = v4_m_spec->tos;
2939                         match->dissector.used_keys |=
2940                                 BIT(FLOW_DISSECTOR_KEY_IP);
2941                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2942                                 offsetof(struct ethtool_rx_flow_key, ip);
2943                 }
2944                 }
2945                 break;
2946         case TCP_V6_FLOW:
2947         case UDP_V6_FLOW: {
2948                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2949
2950                 match->key.basic.n_proto = htons(ETH_P_IPV6);
2951
2952                 v6_spec = &fs->h_u.tcp_ip6_spec;
2953                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2954                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2955                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2956                                sizeof(match->key.ipv6.src));
2957                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2958                                sizeof(match->mask.ipv6.src));
2959                 }
2960                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2961                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2962                                sizeof(match->key.ipv6.dst));
2963                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2964                                sizeof(match->mask.ipv6.dst));
2965                 }
2966                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2967                     memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2968                         match->dissector.used_keys |=
2969                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2970                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2971                                 offsetof(struct ethtool_rx_flow_key, ipv6);
2972                 }
2973                 if (v6_m_spec->psrc) {
2974                         match->key.tp.src = v6_spec->psrc;
2975                         match->mask.tp.src = v6_m_spec->psrc;
2976                 }
2977                 if (v6_m_spec->pdst) {
2978                         match->key.tp.dst = v6_spec->pdst;
2979                         match->mask.tp.dst = v6_m_spec->pdst;
2980                 }
2981                 if (v6_m_spec->psrc ||
2982                     v6_m_spec->pdst) {
2983                         match->dissector.used_keys |=
2984                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2985                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2986                                 offsetof(struct ethtool_rx_flow_key, tp);
2987                 }
2988                 if (v6_m_spec->tclass) {
2989                         match->key.ip.tos = v6_spec->tclass;
2990                         match->mask.ip.tos = v6_m_spec->tclass;
2991                         match->dissector.used_keys |=
2992                                 BIT(FLOW_DISSECTOR_KEY_IP);
2993                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2994                                 offsetof(struct ethtool_rx_flow_key, ip);
2995                 }
2996                 }
2997                 break;
2998         default:
2999                 ethtool_rx_flow_rule_destroy(flow);
3000                 return ERR_PTR(-EINVAL);
3001         }
3002
3003         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3004         case TCP_V4_FLOW:
3005         case TCP_V6_FLOW:
3006                 match->key.basic.ip_proto = IPPROTO_TCP;
3007                 break;
3008         case UDP_V4_FLOW:
3009         case UDP_V6_FLOW:
3010                 match->key.basic.ip_proto = IPPROTO_UDP;
3011                 break;
3012         }
3013         match->mask.basic.ip_proto = 0xff;
3014
3015         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3016         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3017                 offsetof(struct ethtool_rx_flow_key, basic);
3018
3019         if (fs->flow_type & FLOW_EXT) {
3020                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3021                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3022
3023                 if (ext_m_spec->vlan_etype) {
3024                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3025                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3026                 }
3027
3028                 if (ext_m_spec->vlan_tci) {
3029                         match->key.vlan.vlan_id =
3030                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3031                         match->mask.vlan.vlan_id =
3032                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3033
3034                         match->key.vlan.vlan_dei =
3035                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3036                         match->mask.vlan.vlan_dei =
3037                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3038
3039                         match->key.vlan.vlan_priority =
3040                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3041                         match->mask.vlan.vlan_priority =
3042                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3043                 }
3044
3045                 if (ext_m_spec->vlan_etype ||
3046                     ext_m_spec->vlan_tci) {
3047                         match->dissector.used_keys |=
3048                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
3049                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3050                                 offsetof(struct ethtool_rx_flow_key, vlan);
3051                 }
3052         }
3053         if (fs->flow_type & FLOW_MAC_EXT) {
3054                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3055                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3056
3057                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3058                        ETH_ALEN);
3059                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3060                        ETH_ALEN);
3061
3062                 match->dissector.used_keys |=
3063                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3064                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3065                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3066         }
3067
3068         act = &flow->rule->action.entries[0];
3069         switch (fs->ring_cookie) {
3070         case RX_CLS_FLOW_DISC:
3071                 act->id = FLOW_ACTION_DROP;
3072                 break;
3073         case RX_CLS_FLOW_WAKE:
3074                 act->id = FLOW_ACTION_WAKE;
3075                 break;
3076         default:
3077                 act->id = FLOW_ACTION_QUEUE;
3078                 if (fs->flow_type & FLOW_RSS)
3079                         act->queue.ctx = input->rss_ctx;
3080
3081                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3082                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3083                 break;
3084         }
3085
3086         return flow;
3087 }
3088 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3089
3090 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3091 {
3092         kfree(flow->rule);
3093         kfree(flow);
3094 }
3095 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);