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/compat.h>
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/capability.h>
  14 #include <linux/errno.h>
  15 #include <linux/ethtool.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/net_tstamp.h>
  18 #include <linux/phy.h>
  19 #include <linux/bitops.h>
  20 #include <linux/uaccess.h>
  21 #include <linux/vmalloc.h>
  22 #include <linux/sfp.h>
  23 #include <linux/slab.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/sched/signal.h>
  26 #include <linux/net.h>
  27 #include <linux/pm_runtime.h>
  28 #include <net/devlink.h>
  29 #include <net/xdp_sock_drv.h>
  30 #include <net/flow_offload.h>
  31 #include <linux/ethtool_netlink.h>
  32 #include <generated/utsrelease.h>
  33 #include "common.h"
  34
  35 /*
  36  * Some useful ethtool_ops methods that're device independent.
  37  * If we find that all drivers want to do the same thing here,
  38  * we can turn these into dev_() function calls.
  39  */
  40
  41 u32 ethtool_op_get_link(struct net_device *dev)
  42 {
  43         return netif_carrier_ok(dev) ? 1 : 0;
  44 }
  45 EXPORT_SYMBOL(ethtool_op_get_link);
  46
  47 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  48 {
  49         info->so_timestamping =
  50                 SOF_TIMESTAMPING_TX_SOFTWARE |
  51                 SOF_TIMESTAMPING_RX_SOFTWARE |
  52                 SOF_TIMESTAMPING_SOFTWARE;
  53         info->phc_index = -1;
  54         return 0;
  55 }
  56 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  57
  58 /* Handlers for each ethtool command */
  59
  60 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  61 {
  62         struct ethtool_gfeatures cmd = {
  63                 .cmd = ETHTOOL_GFEATURES,
  64                 .size = ETHTOOL_DEV_FEATURE_WORDS,
  65         };
  66         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  67         u32 __user *sizeaddr;
  68         u32 copy_size;
  69         int i;
  70
  71         /* in case feature bits run out again */
  72         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  73
  74         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  75                 features[i].available = (u32)(dev->hw_features >> (32 * i));
  76                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
  77                 features[i].active = (u32)(dev->features >> (32 * i));
  78                 features[i].never_changed =
  79                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
  80         }
  81
  82         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
  83         if (get_user(copy_size, sizeaddr))
  84                 return -EFAULT;
  85
  86         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
  87                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
  88
  89         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
  90                 return -EFAULT;
  91         useraddr += sizeof(cmd);
  92         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
  93                 return -EFAULT;
  94
  95         return 0;
  96 }
  97
  98 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
  99 {
 100         struct ethtool_sfeatures cmd;
 101         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 102         netdev_features_t wanted = 0, valid = 0;
 103         int i, ret = 0;
 104
 105         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 106                 return -EFAULT;
 107         useraddr += sizeof(cmd);
 108
 109         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 110                 return -EINVAL;
 111
 112         if (copy_from_user(features, useraddr, sizeof(features)))
 113                 return -EFAULT;
 114
 115         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 116                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 117                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 118         }
 119
 120         if (valid & ~NETIF_F_ETHTOOL_BITS)
 121                 return -EINVAL;
 122
 123         if (valid & ~dev->hw_features) {
 124                 valid &= dev->hw_features;
 125                 ret |= ETHTOOL_F_UNSUPPORTED;
 126         }
 127
 128         dev->wanted_features &= ~valid;
 129         dev->wanted_features |= wanted & valid;
 130         __netdev_update_features(dev);
 131
 132         if ((dev->wanted_features ^ dev->features) & valid)
 133                 ret |= ETHTOOL_F_WISH;
 134
 135         return ret;
 136 }
 137
 138 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 139 {
 140         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 141         const struct ethtool_ops *ops = dev->ethtool_ops;
 142
 143         if (sset == ETH_SS_FEATURES)
 144                 return ARRAY_SIZE(netdev_features_strings);
 145
 146         if (sset == ETH_SS_RSS_HASH_FUNCS)
 147                 return ARRAY_SIZE(rss_hash_func_strings);
 148
 149         if (sset == ETH_SS_TUNABLES)
 150                 return ARRAY_SIZE(tunable_strings);
 151
 152         if (sset == ETH_SS_PHY_TUNABLES)
 153                 return ARRAY_SIZE(phy_tunable_strings);
 154
 155         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 156             !ops->get_ethtool_phy_stats &&
 157             phy_ops && phy_ops->get_sset_count)
 158                 return phy_ops->get_sset_count(dev->phydev);
 159
 160         if (sset == ETH_SS_LINK_MODES)
 161                 return __ETHTOOL_LINK_MODE_MASK_NBITS;
 162
 163         if (ops->get_sset_count && ops->get_strings)
 164                 return ops->get_sset_count(dev, sset);
 165         else
 166                 return -EOPNOTSUPP;
 167 }
 168
 169 static void __ethtool_get_strings(struct net_device *dev,
 170         u32 stringset, u8 *data)
 171 {
 172         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 173         const struct ethtool_ops *ops = dev->ethtool_ops;
 174
 175         if (stringset == ETH_SS_FEATURES)
 176                 memcpy(data, netdev_features_strings,
 177                         sizeof(netdev_features_strings));
 178         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 179                 memcpy(data, rss_hash_func_strings,
 180                        sizeof(rss_hash_func_strings));
 181         else if (stringset == ETH_SS_TUNABLES)
 182                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 183         else if (stringset == ETH_SS_PHY_TUNABLES)
 184                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 185         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 186                  !ops->get_ethtool_phy_stats && phy_ops &&
 187                  phy_ops->get_strings)
 188                 phy_ops->get_strings(dev->phydev, data);
 189         else if (stringset == ETH_SS_LINK_MODES)
 190                 memcpy(data, link_mode_names,
 191                        __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 192         else
 193                 /* ops->get_strings is valid because checked earlier */
 194                 ops->get_strings(dev, stringset, data);
 195 }
 196
 197 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 198 {
 199         /* feature masks of legacy discrete ethtool ops */
 200
 201         switch (eth_cmd) {
 202         case ETHTOOL_GTXCSUM:
 203         case ETHTOOL_STXCSUM:
 204                 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
 205                        NETIF_F_SCTP_CRC;
 206         case ETHTOOL_GRXCSUM:
 207         case ETHTOOL_SRXCSUM:
 208                 return NETIF_F_RXCSUM;
 209         case ETHTOOL_GSG:
 210         case ETHTOOL_SSG:
 211                 return NETIF_F_SG | NETIF_F_FRAGLIST;
 212         case ETHTOOL_GTSO:
 213         case ETHTOOL_STSO:
 214                 return NETIF_F_ALL_TSO;
 215         case ETHTOOL_GGSO:
 216         case ETHTOOL_SGSO:
 217                 return NETIF_F_GSO;
 218         case ETHTOOL_GGRO:
 219         case ETHTOOL_SGRO:
 220                 return NETIF_F_GRO;
 221         default:
 222                 BUG();
 223         }
 224 }
 225
 226 static int ethtool_get_one_feature(struct net_device *dev,
 227         char __user *useraddr, u32 ethcmd)
 228 {
 229         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 230         struct ethtool_value edata = {
 231                 .cmd = ethcmd,
 232                 .data = !!(dev->features & mask),
 233         };
 234
 235         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 236                 return -EFAULT;
 237         return 0;
 238 }
 239
 240 static int ethtool_set_one_feature(struct net_device *dev,
 241         void __user *useraddr, u32 ethcmd)
 242 {
 243         struct ethtool_value edata;
 244         netdev_features_t mask;
 245
 246         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 247                 return -EFAULT;
 248
 249         mask = ethtool_get_feature_mask(ethcmd);
 250         mask &= dev->hw_features;
 251         if (!mask)
 252                 return -EOPNOTSUPP;
 253
 254         if (edata.data)
 255                 dev->wanted_features |= mask;
 256         else
 257                 dev->wanted_features &= ~mask;
 258
 259         __netdev_update_features(dev);
 260
 261         return 0;
 262 }
 263
 264 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 265                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 266 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 267                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 268                           NETIF_F_RXHASH)
 269
 270 static u32 __ethtool_get_flags(struct net_device *dev)
 271 {
 272         u32 flags = 0;
 273
 274         if (dev->features & NETIF_F_LRO)
 275                 flags |= ETH_FLAG_LRO;
 276         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 277                 flags |= ETH_FLAG_RXVLAN;
 278         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 279                 flags |= ETH_FLAG_TXVLAN;
 280         if (dev->features & NETIF_F_NTUPLE)
 281                 flags |= ETH_FLAG_NTUPLE;
 282         if (dev->features & NETIF_F_RXHASH)
 283                 flags |= ETH_FLAG_RXHASH;
 284
 285         return flags;
 286 }
 287
 288 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 289 {
 290         netdev_features_t features = 0, changed;
 291
 292         if (data & ~ETH_ALL_FLAGS)
 293                 return -EINVAL;
 294
 295         if (data & ETH_FLAG_LRO)
 296                 features |= NETIF_F_LRO;
 297         if (data & ETH_FLAG_RXVLAN)
 298                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 299         if (data & ETH_FLAG_TXVLAN)
 300                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 301         if (data & ETH_FLAG_NTUPLE)
 302                 features |= NETIF_F_NTUPLE;
 303         if (data & ETH_FLAG_RXHASH)
 304                 features |= NETIF_F_RXHASH;
 305
 306         /* allow changing only bits set in hw_features */
 307         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 308         if (changed & ~dev->hw_features)
 309                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 310
 311         dev->wanted_features =
 312                 (dev->wanted_features & ~changed) | (features & changed);
 313
 314         __netdev_update_features(dev);
 315
 316         return 0;
 317 }
 318
 319 /* Given two link masks, AND them together and save the result in dst. */
 320 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 321                                   struct ethtool_link_ksettings *src)
 322 {
 323         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 324         unsigned int idx = 0;
 325
 326         for (; idx < size; idx++) {
 327                 dst->link_modes.supported[idx] &=
 328                         src->link_modes.supported[idx];
 329                 dst->link_modes.advertising[idx] &=
 330                         src->link_modes.advertising[idx];
 331         }
 332 }
 333 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 334
 335 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 336                                              u32 legacy_u32)
 337 {
 338         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 339         dst[0] = legacy_u32;
 340 }
 341 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 342
 343 /* return false if src had higher bits set. lower bits always updated. */
 344 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 345                                              const unsigned long *src)
 346 {
 347         bool retval = true;
 348
 349         /* TODO: following test will soon always be true */
 350         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 351                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 352
 353                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 354                 bitmap_fill(ext, 32);
 355                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 356                 if (bitmap_intersects(ext, src,
 357                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 358                         /* src mask goes beyond bit 31 */
 359                         retval = false;
 360                 }
 361         }
 362         *legacy_u32 = src[0];
 363         return retval;
 364 }
 365 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 366
 367 /* return false if ksettings link modes had higher bits
 368  * set. legacy_settings always updated (best effort)
 369  */
 370 static bool
 371 convert_link_ksettings_to_legacy_settings(
 372         struct ethtool_cmd *legacy_settings,
 373         const struct ethtool_link_ksettings *link_ksettings)
 374 {
 375         bool retval = true;
 376
 377         memset(legacy_settings, 0, sizeof(*legacy_settings));
 378         /* this also clears the deprecated fields in legacy structure:
 379          * __u8         transceiver;
 380          * __u32        maxtxpkt;
 381          * __u32        maxrxpkt;
 382          */
 383
 384         retval &= ethtool_convert_link_mode_to_legacy_u32(
 385                 &legacy_settings->supported,
 386                 link_ksettings->link_modes.supported);
 387         retval &= ethtool_convert_link_mode_to_legacy_u32(
 388                 &legacy_settings->advertising,
 389                 link_ksettings->link_modes.advertising);
 390         retval &= ethtool_convert_link_mode_to_legacy_u32(
 391                 &legacy_settings->lp_advertising,
 392                 link_ksettings->link_modes.lp_advertising);
 393         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 394         legacy_settings->duplex
 395                 = link_ksettings->base.duplex;
 396         legacy_settings->port
 397                 = link_ksettings->base.port;
 398         legacy_settings->phy_address
 399                 = link_ksettings->base.phy_address;
 400         legacy_settings->autoneg
 401                 = link_ksettings->base.autoneg;
 402         legacy_settings->mdio_support
 403                 = link_ksettings->base.mdio_support;
 404         legacy_settings->eth_tp_mdix
 405                 = link_ksettings->base.eth_tp_mdix;
 406         legacy_settings->eth_tp_mdix_ctrl
 407                 = link_ksettings->base.eth_tp_mdix_ctrl;
 408         legacy_settings->transceiver
 409                 = link_ksettings->base.transceiver;
 410         return retval;
 411 }
 412
 413 /* number of 32-bit words to store the user's link mode bitmaps */
 414 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 415         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 416
 417 /* layout of the struct passed from/to userland */
 418 struct ethtool_link_usettings {
 419         struct ethtool_link_settings base;
 420         struct {
 421                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 422                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 423                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 424         } link_modes;
 425 };
 426
 427 /* Internal kernel helper to query a device ethtool_link_settings. */
 428 int __ethtool_get_link_ksettings(struct net_device *dev,
 429                                  struct ethtool_link_ksettings *link_ksettings)
 430 {
 431         ASSERT_RTNL();
 432
 433         if (!dev->ethtool_ops->get_link_ksettings)
 434                 return -EOPNOTSUPP;
 435
 436         memset(link_ksettings, 0, sizeof(*link_ksettings));
 437         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 438 }
 439 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 440
 441 /* convert ethtool_link_usettings in user space to a kernel internal
 442  * ethtool_link_ksettings. return 0 on success, errno on error.
 443  */
 444 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 445                                          const void __user *from)
 446 {
 447         struct ethtool_link_usettings link_usettings;
 448
 449         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 450                 return -EFAULT;
 451
 452         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 453         bitmap_from_arr32(to->link_modes.supported,
 454                           link_usettings.link_modes.supported,
 455                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 456         bitmap_from_arr32(to->link_modes.advertising,
 457                           link_usettings.link_modes.advertising,
 458                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 459         bitmap_from_arr32(to->link_modes.lp_advertising,
 460                           link_usettings.link_modes.lp_advertising,
 461                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 462
 463         return 0;
 464 }
 465
 466 /* Check if the user is trying to change anything besides speed/duplex */
 467 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
 468 {
 469         struct ethtool_link_settings base2 = {};
 470
 471         base2.speed = cmd->base.speed;
 472         base2.port = PORT_OTHER;
 473         base2.duplex = cmd->base.duplex;
 474         base2.cmd = cmd->base.cmd;
 475         base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
 476
 477         return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
 478                 bitmap_empty(cmd->link_modes.supported,
 479                              __ETHTOOL_LINK_MODE_MASK_NBITS) &&
 480                 bitmap_empty(cmd->link_modes.lp_advertising,
 481                              __ETHTOOL_LINK_MODE_MASK_NBITS);
 482 }
 483
 484 /* convert a kernel internal ethtool_link_ksettings to
 485  * ethtool_link_usettings in user space. return 0 on success, errno on
 486  * error.
 487  */
 488 static int
 489 store_link_ksettings_for_user(void __user *to,
 490                               const struct ethtool_link_ksettings *from)
 491 {
 492         struct ethtool_link_usettings link_usettings;
 493
 494         memcpy(&link_usettings, from, sizeof(link_usettings));
 495         bitmap_to_arr32(link_usettings.link_modes.supported,
 496                         from->link_modes.supported,
 497                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 498         bitmap_to_arr32(link_usettings.link_modes.advertising,
 499                         from->link_modes.advertising,
 500                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 501         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 502                         from->link_modes.lp_advertising,
 503                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 504
 505         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 506                 return -EFAULT;
 507
 508         return 0;
 509 }
 510
 511 /* Query device for its ethtool_link_settings. */
 512 static int ethtool_get_link_ksettings(struct net_device *dev,
 513                                       void __user *useraddr)
 514 {
 515         int err = 0;
 516         struct ethtool_link_ksettings link_ksettings;
 517
 518         ASSERT_RTNL();
 519         if (!dev->ethtool_ops->get_link_ksettings)
 520                 return -EOPNOTSUPP;
 521
 522         /* handle bitmap nbits handshake */
 523         if (copy_from_user(&link_ksettings.base, useraddr,
 524                            sizeof(link_ksettings.base)))
 525                 return -EFAULT;
 526
 527         if (__ETHTOOL_LINK_MODE_MASK_NU32
 528             != link_ksettings.base.link_mode_masks_nwords) {
 529                 /* wrong link mode nbits requested */
 530                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 531                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 532                 /* send back number of words required as negative val */
 533                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 534                                    "need too many bits for link modes!");
 535                 link_ksettings.base.link_mode_masks_nwords
 536                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 537
 538                 /* copy the base fields back to user, not the link
 539                  * mode bitmaps
 540                  */
 541                 if (copy_to_user(useraddr, &link_ksettings.base,
 542                                  sizeof(link_ksettings.base)))
 543                         return -EFAULT;
 544
 545                 return 0;
 546         }
 547
 548         /* handshake successful: user/kernel agree on
 549          * link_mode_masks_nwords
 550          */
 551
 552         memset(&link_ksettings, 0, sizeof(link_ksettings));
 553         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 554         if (err < 0)
 555                 return err;
 556
 557         /* make sure we tell the right values to user */
 558         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 559         link_ksettings.base.link_mode_masks_nwords
 560                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 561         link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
 562         link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 563
 564         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 565 }
 566
 567 /* Update device ethtool_link_settings. */
 568 static int ethtool_set_link_ksettings(struct net_device *dev,
 569                                       void __user *useraddr)
 570 {
 571         int err;
 572         struct ethtool_link_ksettings link_ksettings;
 573
 574         ASSERT_RTNL();
 575
 576         if (!dev->ethtool_ops->set_link_ksettings)
 577                 return -EOPNOTSUPP;
 578
 579         /* make sure nbits field has expected value */
 580         if (copy_from_user(&link_ksettings.base, useraddr,
 581                            sizeof(link_ksettings.base)))
 582                 return -EFAULT;
 583
 584         if (__ETHTOOL_LINK_MODE_MASK_NU32
 585             != link_ksettings.base.link_mode_masks_nwords)
 586                 return -EINVAL;
 587
 588         /* copy the whole structure, now that we know it has expected
 589          * format
 590          */
 591         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 592         if (err)
 593                 return err;
 594
 595         /* re-check nwords field, just in case */
 596         if (__ETHTOOL_LINK_MODE_MASK_NU32
 597             != link_ksettings.base.link_mode_masks_nwords)
 598                 return -EINVAL;
 599
 600         if (link_ksettings.base.master_slave_cfg ||
 601             link_ksettings.base.master_slave_state)
 602                 return -EINVAL;
 603
 604         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 605         if (err >= 0) {
 606                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 607                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 608         }
 609         return err;
 610 }
 611
 612 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 613                                        const struct ethtool_link_ksettings *cmd,
 614                                        u32 *dev_speed, u8 *dev_duplex)
 615 {
 616         u32 speed;
 617         u8 duplex;
 618
 619         speed = cmd->base.speed;
 620         duplex = cmd->base.duplex;
 621         /* don't allow custom speed and duplex */
 622         if (!ethtool_validate_speed(speed) ||
 623             !ethtool_validate_duplex(duplex) ||
 624             !ethtool_virtdev_validate_cmd(cmd))
 625                 return -EINVAL;
 626         *dev_speed = speed;
 627         *dev_duplex = duplex;
 628
 629         return 0;
 630 }
 631 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 632
 633 /* Query device for its ethtool_cmd settings.
 634  *
 635  * Backward compatibility note: for compatibility with legacy ethtool, this is
 636  * now implemented via get_link_ksettings. When driver reports higher link mode
 637  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 638  * recommend user to upgrade ethtool, but the command is successful (only the
 639  * lower link mode bits reported back to user). Deprecated fields from
 640  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 641  */
 642 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 643 {
 644         struct ethtool_link_ksettings link_ksettings;
 645         struct ethtool_cmd cmd;
 646         int err;
 647
 648         ASSERT_RTNL();
 649         if (!dev->ethtool_ops->get_link_ksettings)
 650                 return -EOPNOTSUPP;
 651
 652         memset(&link_ksettings, 0, sizeof(link_ksettings));
 653         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 654         if (err < 0)
 655                 return err;
 656         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 657
 658         /* send a sensible cmd tag back to user */
 659         cmd.cmd = ETHTOOL_GSET;
 660
 661         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 662                 return -EFAULT;
 663
 664         return 0;
 665 }
 666
 667 /* Update device link settings with given ethtool_cmd.
 668  *
 669  * Backward compatibility note: for compatibility with legacy ethtool, this is
 670  * now always implemented via set_link_settings. When user's request updates
 671  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 672  * warning is logged once (with name of 1st driver/device) to recommend user to
 673  * upgrade ethtool, and the request is rejected.
 674  */
 675 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 676 {
 677         struct ethtool_link_ksettings link_ksettings;
 678         struct ethtool_cmd cmd;
 679         int ret;
 680
 681         ASSERT_RTNL();
 682
 683         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 684                 return -EFAULT;
 685         if (!dev->ethtool_ops->set_link_ksettings)
 686                 return -EOPNOTSUPP;
 687
 688         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 689                 return -EINVAL;
 690         link_ksettings.base.link_mode_masks_nwords =
 691                 __ETHTOOL_LINK_MODE_MASK_NU32;
 692         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 693         if (ret >= 0) {
 694                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 695                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 696         }
 697         return ret;
 698 }
 699
 700 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 701                                                   void __user *useraddr)
 702 {
 703         struct ethtool_drvinfo info;
 704         const struct ethtool_ops *ops = dev->ethtool_ops;
 705
 706         memset(&info, 0, sizeof(info));
 707         info.cmd = ETHTOOL_GDRVINFO;
 708         strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
 709         if (ops->get_drvinfo) {
 710                 ops->get_drvinfo(dev, &info);
 711         } else if (dev->dev.parent && dev->dev.parent->driver) {
 712                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 713                         sizeof(info.bus_info));
 714                 strlcpy(info.driver, dev->dev.parent->driver->name,
 715                         sizeof(info.driver));
 716         } else {
 717                 return -EOPNOTSUPP;
 718         }
 719
 720         /*
 721          * this method of obtaining string set info is deprecated;
 722          * Use ETHTOOL_GSSET_INFO instead.
 723          */
 724         if (ops->get_sset_count) {
 725                 int rc;
 726
 727                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 728                 if (rc >= 0)
 729                         info.testinfo_len = rc;
 730                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 731                 if (rc >= 0)
 732                         info.n_stats = rc;
 733                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 734                 if (rc >= 0)
 735                         info.n_priv_flags = rc;
 736         }
 737         if (ops->get_regs_len) {
 738                 int ret = ops->get_regs_len(dev);
 739
 740                 if (ret > 0)
 741                         info.regdump_len = ret;
 742         }
 743
 744         if (ops->get_eeprom_len)
 745                 info.eedump_len = ops->get_eeprom_len(dev);
 746
 747         if (!info.fw_version[0])
 748                 devlink_compat_running_version(dev, info.fw_version,
 749                                                sizeof(info.fw_version));
 750
 751         if (copy_to_user(useraddr, &info, sizeof(info)))
 752                 return -EFAULT;
 753         return 0;
 754 }
 755
 756 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 757                                                     void __user *useraddr)
 758 {
 759         struct ethtool_sset_info info;
 760         u64 sset_mask;
 761         int i, idx = 0, n_bits = 0, ret, rc;
 762         u32 *info_buf = NULL;
 763
 764         if (copy_from_user(&info, useraddr, sizeof(info)))
 765                 return -EFAULT;
 766
 767         /* store copy of mask, because we zero struct later on */
 768         sset_mask = info.sset_mask;
 769         if (!sset_mask)
 770                 return 0;
 771
 772         /* calculate size of return buffer */
 773         n_bits = hweight64(sset_mask);
 774
 775         memset(&info, 0, sizeof(info));
 776         info.cmd = ETHTOOL_GSSET_INFO;
 777
 778         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 779         if (!info_buf)
 780                 return -ENOMEM;
 781
 782         /*
 783          * fill return buffer based on input bitmask and successful
 784          * get_sset_count return
 785          */
 786         for (i = 0; i < 64; i++) {
 787                 if (!(sset_mask & (1ULL << i)))
 788                         continue;
 789
 790                 rc = __ethtool_get_sset_count(dev, i);
 791                 if (rc >= 0) {
 792                         info.sset_mask |= (1ULL << i);
 793                         info_buf[idx++] = rc;
 794                 }
 795         }
 796
 797         ret = -EFAULT;
 798         if (copy_to_user(useraddr, &info, sizeof(info)))
 799                 goto out;
 800
 801         useraddr += offsetof(struct ethtool_sset_info, data);
 802         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 803                 goto out;
 804
 805         ret = 0;
 806
 807 out:
 808         kfree(info_buf);
 809         return ret;
 810 }
 811
 812 static noinline_for_stack int
 813 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
 814                                const struct compat_ethtool_rxnfc __user *useraddr,
 815                                size_t size)
 816 {
 817         struct compat_ethtool_rxnfc crxnfc = {};
 818
 819         /* We expect there to be holes between fs.m_ext and
 820          * fs.ring_cookie and at the end of fs, but nowhere else.
 821          * On non-x86, no conversion should be needed.
 822          */
 823         BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
 824                      sizeof(struct compat_ethtool_rxnfc) !=
 825                      sizeof(struct ethtool_rxnfc));
 826         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
 827                      sizeof(useraddr->fs.m_ext) !=
 828                      offsetof(struct ethtool_rxnfc, fs.m_ext) +
 829                      sizeof(rxnfc->fs.m_ext));
 830         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
 831                      offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
 832                      offsetof(struct ethtool_rxnfc, fs.location) -
 833                      offsetof(struct ethtool_rxnfc, fs.ring_cookie));
 834
 835         if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
 836                 return -EFAULT;
 837
 838         *rxnfc = (struct ethtool_rxnfc) {
 839                 .cmd            = crxnfc.cmd,
 840                 .flow_type      = crxnfc.flow_type,
 841                 .data           = crxnfc.data,
 842                 .fs             = {
 843                         .flow_type      = crxnfc.fs.flow_type,
 844                         .h_u            = crxnfc.fs.h_u,
 845                         .h_ext          = crxnfc.fs.h_ext,
 846                         .m_u            = crxnfc.fs.m_u,
 847                         .m_ext          = crxnfc.fs.m_ext,
 848                         .ring_cookie    = crxnfc.fs.ring_cookie,
 849                         .location       = crxnfc.fs.location,
 850                 },
 851                 .rule_cnt       = crxnfc.rule_cnt,
 852         };
 853
 854         return 0;
 855 }
 856
 857 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
 858                                         const void __user *useraddr,
 859                                         size_t size)
 860 {
 861         if (compat_need_64bit_alignment_fixup())
 862                 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
 863
 864         if (copy_from_user(rxnfc, useraddr, size))
 865                 return -EFAULT;
 866
 867         return 0;
 868 }
 869
 870 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
 871                                         const struct ethtool_rxnfc *rxnfc,
 872                                         size_t size, const u32 *rule_buf)
 873 {
 874         struct compat_ethtool_rxnfc crxnfc;
 875
 876         memset(&crxnfc, 0, sizeof(crxnfc));
 877         crxnfc = (struct compat_ethtool_rxnfc) {
 878                 .cmd            = rxnfc->cmd,
 879                 .flow_type      = rxnfc->flow_type,
 880                 .data           = rxnfc->data,
 881                 .fs             = {
 882                         .flow_type      = rxnfc->fs.flow_type,
 883                         .h_u            = rxnfc->fs.h_u,
 884                         .h_ext          = rxnfc->fs.h_ext,
 885                         .m_u            = rxnfc->fs.m_u,
 886                         .m_ext          = rxnfc->fs.m_ext,
 887                         .ring_cookie    = rxnfc->fs.ring_cookie,
 888                         .location       = rxnfc->fs.location,
 889                 },
 890                 .rule_cnt       = rxnfc->rule_cnt,
 891         };
 892
 893         if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
 894                 return -EFAULT;
 895
 896         return 0;
 897 }
 898
 899 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
 900                                       const struct ethtool_rxnfc *rxnfc,
 901                                       size_t size, const u32 *rule_buf)
 902 {
 903         int ret;
 904
 905         if (compat_need_64bit_alignment_fixup()) {
 906                 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
 907                                                    rule_buf);
 908                 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
 909         } else {
 910                 ret = copy_to_user(useraddr, rxnfc, size);
 911                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 912         }
 913
 914         if (ret)
 915                 return -EFAULT;
 916
 917         if (rule_buf) {
 918                 if (copy_to_user(useraddr, rule_buf,
 919                                  rxnfc->rule_cnt * sizeof(u32)))
 920                         return -EFAULT;
 921         }
 922
 923         return 0;
 924 }
 925
 926 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 927                                                 u32 cmd, void __user *useraddr)
 928 {
 929         struct ethtool_rxnfc info;
 930         size_t info_size = sizeof(info);
 931         int rc;
 932
 933         if (!dev->ethtool_ops->set_rxnfc)
 934                 return -EOPNOTSUPP;
 935
 936         /* struct ethtool_rxnfc was originally defined for
 937          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 938          * members.  User-space might still be using that
 939          * definition. */
 940         if (cmd == ETHTOOL_SRXFH)
 941                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 942                              sizeof(info.data));
 943
 944         if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
 945                 return -EFAULT;
 946
 947         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 948         if (rc)
 949                 return rc;
 950
 951         if (cmd == ETHTOOL_SRXCLSRLINS &&
 952             ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
 953                 return -EFAULT;
 954
 955         return 0;
 956 }
 957
 958 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 959                                                 u32 cmd, void __user *useraddr)
 960 {
 961         struct ethtool_rxnfc info;
 962         size_t info_size = sizeof(info);
 963         const struct ethtool_ops *ops = dev->ethtool_ops;
 964         int ret;
 965         void *rule_buf = NULL;
 966
 967         if (!ops->get_rxnfc)
 968                 return -EOPNOTSUPP;
 969
 970         /* struct ethtool_rxnfc was originally defined for
 971          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 972          * members.  User-space might still be using that
 973          * definition. */
 974         if (cmd == ETHTOOL_GRXFH)
 975                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 976                              sizeof(info.data));
 977
 978         if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
 979                 return -EFAULT;
 980
 981         /* If FLOW_RSS was requested then user-space must be using the
 982          * new definition, as FLOW_RSS is newer.
 983          */
 984         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
 985                 info_size = sizeof(info);
 986                 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
 987                         return -EFAULT;
 988                 /* Since malicious users may modify the original data,
 989                  * we need to check whether FLOW_RSS is still requested.
 990                  */
 991                 if (!(info.flow_type & FLOW_RSS))
 992                         return -EINVAL;
 993         }
 994
 995         if (info.cmd != cmd)
 996                 return -EINVAL;
 997
 998         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 999                 if (info.rule_cnt > 0) {
1000                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1001                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1002                                                    GFP_USER);
1003                         if (!rule_buf)
1004                                 return -ENOMEM;
1005                 }
1006         }
1007
1008         ret = ops->get_rxnfc(dev, &info, rule_buf);
1009         if (ret < 0)
1010                 goto err_out;
1011
1012         ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1013 err_out:
1014         kfree(rule_buf);
1015
1016         return ret;
1017 }
1018
1019 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1020                                         struct ethtool_rxnfc *rx_rings,
1021                                         u32 size)
1022 {
1023         int i;
1024
1025         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1026                 return -EFAULT;
1027
1028         /* Validate ring indices */
1029         for (i = 0; i < size; i++)
1030                 if (indir[i] >= rx_rings->data)
1031                         return -EINVAL;
1032
1033         return 0;
1034 }
1035
1036 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1037
1038 void netdev_rss_key_fill(void *buffer, size_t len)
1039 {
1040         BUG_ON(len > sizeof(netdev_rss_key));
1041         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1042         memcpy(buffer, netdev_rss_key, len);
1043 }
1044 EXPORT_SYMBOL(netdev_rss_key_fill);
1045
1046 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1047                                                      void __user *useraddr)
1048 {
1049         u32 user_size, dev_size;
1050         u32 *indir;
1051         int ret;
1052
1053         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1054             !dev->ethtool_ops->get_rxfh)
1055                 return -EOPNOTSUPP;
1056         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1057         if (dev_size == 0)
1058                 return -EOPNOTSUPP;
1059
1060         if (copy_from_user(&user_size,
1061                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1062                            sizeof(user_size)))
1063                 return -EFAULT;
1064
1065         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1066                          &dev_size, sizeof(dev_size)))
1067                 return -EFAULT;
1068
1069         /* If the user buffer size is 0, this is just a query for the
1070          * device table size.  Otherwise, if it's smaller than the
1071          * device table size it's an error.
1072          */
1073         if (user_size < dev_size)
1074                 return user_size == 0 ? 0 : -EINVAL;
1075
1076         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1077         if (!indir)
1078                 return -ENOMEM;
1079
1080         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1081         if (ret)
1082                 goto out;
1083
1084         if (copy_to_user(useraddr +
1085                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1086                          indir, dev_size * sizeof(indir[0])))
1087                 ret = -EFAULT;
1088
1089 out:
1090         kfree(indir);
1091         return ret;
1092 }
1093
1094 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1095                                                      void __user *useraddr)
1096 {
1097         struct ethtool_rxnfc rx_rings;
1098         u32 user_size, dev_size, i;
1099         u32 *indir;
1100         const struct ethtool_ops *ops = dev->ethtool_ops;
1101         int ret;
1102         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1103
1104         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1105             !ops->get_rxnfc)
1106                 return -EOPNOTSUPP;
1107
1108         dev_size = ops->get_rxfh_indir_size(dev);
1109         if (dev_size == 0)
1110                 return -EOPNOTSUPP;
1111
1112         if (copy_from_user(&user_size,
1113                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1114                            sizeof(user_size)))
1115                 return -EFAULT;
1116
1117         if (user_size != 0 && user_size != dev_size)
1118                 return -EINVAL;
1119
1120         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1121         if (!indir)
1122                 return -ENOMEM;
1123
1124         rx_rings.cmd = ETHTOOL_GRXRINGS;
1125         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1126         if (ret)
1127                 goto out;
1128
1129         if (user_size == 0) {
1130                 for (i = 0; i < dev_size; i++)
1131                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1132         } else {
1133                 ret = ethtool_copy_validate_indir(indir,
1134                                                   useraddr + ringidx_offset,
1135                                                   &rx_rings,
1136                                                   dev_size);
1137                 if (ret)
1138                         goto out;
1139         }
1140
1141         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1142         if (ret)
1143                 goto out;
1144
1145         /* indicate whether rxfh was set to default */
1146         if (user_size == 0)
1147                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1148         else
1149                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1150
1151 out:
1152         kfree(indir);
1153         return ret;
1154 }
1155
1156 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1157                                                void __user *useraddr)
1158 {
1159         int ret;
1160         const struct ethtool_ops *ops = dev->ethtool_ops;
1161         u32 user_indir_size, user_key_size;
1162         u32 dev_indir_size = 0, dev_key_size = 0;
1163         struct ethtool_rxfh rxfh;
1164         u32 total_size;
1165         u32 indir_bytes;
1166         u32 *indir = NULL;
1167         u8 dev_hfunc = 0;
1168         u8 *hkey = NULL;
1169         u8 *rss_config;
1170
1171         if (!ops->get_rxfh)
1172                 return -EOPNOTSUPP;
1173
1174         if (ops->get_rxfh_indir_size)
1175                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1176         if (ops->get_rxfh_key_size)
1177                 dev_key_size = ops->get_rxfh_key_size(dev);
1178
1179         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1180                 return -EFAULT;
1181         user_indir_size = rxfh.indir_size;
1182         user_key_size = rxfh.key_size;
1183
1184         /* Check that reserved fields are 0 for now */
1185         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1186                 return -EINVAL;
1187         /* Most drivers don't handle rss_context, check it's 0 as well */
1188         if (rxfh.rss_context && !ops->get_rxfh_context)
1189                 return -EOPNOTSUPP;
1190
1191         rxfh.indir_size = dev_indir_size;
1192         rxfh.key_size = dev_key_size;
1193         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1194                 return -EFAULT;
1195
1196         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1197             (user_key_size && (user_key_size != dev_key_size)))
1198                 return -EINVAL;
1199
1200         indir_bytes = user_indir_size * sizeof(indir[0]);
1201         total_size = indir_bytes + user_key_size;
1202         rss_config = kzalloc(total_size, GFP_USER);
1203         if (!rss_config)
1204                 return -ENOMEM;
1205
1206         if (user_indir_size)
1207                 indir = (u32 *)rss_config;
1208
1209         if (user_key_size)
1210                 hkey = rss_config + indir_bytes;
1211
1212         if (rxfh.rss_context)
1213                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1214                                                          &dev_hfunc,
1215                                                          rxfh.rss_context);
1216         else
1217                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1218         if (ret)
1219                 goto out;
1220
1221         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1222                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1223                 ret = -EFAULT;
1224         } else if (copy_to_user(useraddr +
1225                               offsetof(struct ethtool_rxfh, rss_config[0]),
1226                               rss_config, total_size)) {
1227                 ret = -EFAULT;
1228         }
1229 out:
1230         kfree(rss_config);
1231
1232         return ret;
1233 }
1234
1235 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1236                                                void __user *useraddr)
1237 {
1238         int ret;
1239         const struct ethtool_ops *ops = dev->ethtool_ops;
1240         struct ethtool_rxnfc rx_rings;
1241         struct ethtool_rxfh rxfh;
1242         u32 dev_indir_size = 0, dev_key_size = 0, i;
1243         u32 *indir = NULL, indir_bytes = 0;
1244         u8 *hkey = NULL;
1245         u8 *rss_config;
1246         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1247         bool delete = false;
1248
1249         if (!ops->get_rxnfc || !ops->set_rxfh)
1250                 return -EOPNOTSUPP;
1251
1252         if (ops->get_rxfh_indir_size)
1253                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1254         if (ops->get_rxfh_key_size)
1255                 dev_key_size = ops->get_rxfh_key_size(dev);
1256
1257         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1258                 return -EFAULT;
1259
1260         /* Check that reserved fields are 0 for now */
1261         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1262                 return -EINVAL;
1263         /* Most drivers don't handle rss_context, check it's 0 as well */
1264         if (rxfh.rss_context && !ops->set_rxfh_context)
1265                 return -EOPNOTSUPP;
1266
1267         /* If either indir, hash key or function is valid, proceed further.
1268          * Must request at least one change: indir size, hash key or function.
1269          */
1270         if ((rxfh.indir_size &&
1271              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1272              rxfh.indir_size != dev_indir_size) ||
1273             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1274             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1275              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1276                 return -EINVAL;
1277
1278         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1279                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1280
1281         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1282         if (!rss_config)
1283                 return -ENOMEM;
1284
1285         rx_rings.cmd = ETHTOOL_GRXRINGS;
1286         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1287         if (ret)
1288                 goto out;
1289
1290         /* rxfh.indir_size == 0 means reset the indir table to default (master
1291          * context) or delete the context (other RSS contexts).
1292          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1293          */
1294         if (rxfh.indir_size &&
1295             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1296                 indir = (u32 *)rss_config;
1297                 ret = ethtool_copy_validate_indir(indir,
1298                                                   useraddr + rss_cfg_offset,
1299                                                   &rx_rings,
1300                                                   rxfh.indir_size);
1301                 if (ret)
1302                         goto out;
1303         } else if (rxfh.indir_size == 0) {
1304                 if (rxfh.rss_context == 0) {
1305                         indir = (u32 *)rss_config;
1306                         for (i = 0; i < dev_indir_size; i++)
1307                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1308                 } else {
1309                         delete = true;
1310                 }
1311         }
1312
1313         if (rxfh.key_size) {
1314                 hkey = rss_config + indir_bytes;
1315                 if (copy_from_user(hkey,
1316                                    useraddr + rss_cfg_offset + indir_bytes,
1317                                    rxfh.key_size)) {
1318                         ret = -EFAULT;
1319                         goto out;
1320                 }
1321         }
1322
1323         if (rxfh.rss_context)
1324                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1325                                             &rxfh.rss_context, delete);
1326         else
1327                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1328         if (ret)
1329                 goto out;
1330
1331         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1332                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1333                 ret = -EFAULT;
1334
1335         if (!rxfh.rss_context) {
1336                 /* indicate whether rxfh was set to default */
1337                 if (rxfh.indir_size == 0)
1338                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1339                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1340                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1341         }
1342
1343 out:
1344         kfree(rss_config);
1345         return ret;
1346 }
1347
1348 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1349 {
1350         struct ethtool_regs regs;
1351         const struct ethtool_ops *ops = dev->ethtool_ops;
1352         void *regbuf;
1353         int reglen, ret;
1354
1355         if (!ops->get_regs || !ops->get_regs_len)
1356                 return -EOPNOTSUPP;
1357
1358         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1359                 return -EFAULT;
1360
1361         reglen = ops->get_regs_len(dev);
1362         if (reglen <= 0)
1363                 return reglen;
1364
1365         if (regs.len > reglen)
1366                 regs.len = reglen;
1367
1368         regbuf = vzalloc(reglen);
1369         if (!regbuf)
1370                 return -ENOMEM;
1371
1372         if (regs.len < reglen)
1373                 reglen = regs.len;
1374
1375         ops->get_regs(dev, &regs, regbuf);
1376
1377         ret = -EFAULT;
1378         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1379                 goto out;
1380         useraddr += offsetof(struct ethtool_regs, data);
1381         if (copy_to_user(useraddr, regbuf, reglen))
1382                 goto out;
1383         ret = 0;
1384
1385  out:
1386         vfree(regbuf);
1387         return ret;
1388 }
1389
1390 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1391 {
1392         struct ethtool_value reset;
1393         int ret;
1394
1395         if (!dev->ethtool_ops->reset)
1396                 return -EOPNOTSUPP;
1397
1398         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1399                 return -EFAULT;
1400
1401         ret = dev->ethtool_ops->reset(dev, &reset.data);
1402         if (ret)
1403                 return ret;
1404
1405         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1406                 return -EFAULT;
1407         return 0;
1408 }
1409
1410 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1411 {
1412         struct ethtool_wolinfo wol;
1413
1414         if (!dev->ethtool_ops->get_wol)
1415                 return -EOPNOTSUPP;
1416
1417         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1418         wol.cmd = ETHTOOL_GWOL;
1419         dev->ethtool_ops->get_wol(dev, &wol);
1420
1421         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1422                 return -EFAULT;
1423         return 0;
1424 }
1425
1426 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1427 {
1428         struct ethtool_wolinfo wol;
1429         int ret;
1430
1431         if (!dev->ethtool_ops->set_wol)
1432                 return -EOPNOTSUPP;
1433
1434         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1435                 return -EFAULT;
1436
1437         ret = dev->ethtool_ops->set_wol(dev, &wol);
1438         if (ret)
1439                 return ret;
1440
1441         dev->wol_enabled = !!wol.wolopts;
1442         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1443
1444         return 0;
1445 }
1446
1447 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1448 {
1449         struct ethtool_eee edata;
1450         int rc;
1451
1452         if (!dev->ethtool_ops->get_eee)
1453                 return -EOPNOTSUPP;
1454
1455         memset(&edata, 0, sizeof(struct ethtool_eee));
1456         edata.cmd = ETHTOOL_GEEE;
1457         rc = dev->ethtool_ops->get_eee(dev, &edata);
1458
1459         if (rc)
1460                 return rc;
1461
1462         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1463                 return -EFAULT;
1464
1465         return 0;
1466 }
1467
1468 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1469 {
1470         struct ethtool_eee edata;
1471         int ret;
1472
1473         if (!dev->ethtool_ops->set_eee)
1474                 return -EOPNOTSUPP;
1475
1476         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1477                 return -EFAULT;
1478
1479         ret = dev->ethtool_ops->set_eee(dev, &edata);
1480         if (!ret)
1481                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1482         return ret;
1483 }
1484
1485 static int ethtool_nway_reset(struct net_device *dev)
1486 {
1487         if (!dev->ethtool_ops->nway_reset)
1488                 return -EOPNOTSUPP;
1489
1490         return dev->ethtool_ops->nway_reset(dev);
1491 }
1492
1493 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1494 {
1495         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1496         int link = __ethtool_get_link(dev);
1497
1498         if (link < 0)
1499                 return link;
1500
1501         edata.data = link;
1502         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1503                 return -EFAULT;
1504         return 0;
1505 }
1506
1507 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1508                                   int (*getter)(struct net_device *,
1509                                                 struct ethtool_eeprom *, u8 *),
1510                                   u32 total_len)
1511 {
1512         struct ethtool_eeprom eeprom;
1513         void __user *userbuf = useraddr + sizeof(eeprom);
1514         u32 bytes_remaining;
1515         u8 *data;
1516         int ret = 0;
1517
1518         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1519                 return -EFAULT;
1520
1521         /* Check for wrap and zero */
1522         if (eeprom.offset + eeprom.len <= eeprom.offset)
1523                 return -EINVAL;
1524
1525         /* Check for exceeding total eeprom len */
1526         if (eeprom.offset + eeprom.len > total_len)
1527                 return -EINVAL;
1528
1529         data = kzalloc(PAGE_SIZE, GFP_USER);
1530         if (!data)
1531                 return -ENOMEM;
1532
1533         bytes_remaining = eeprom.len;
1534         while (bytes_remaining > 0) {
1535                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1536
1537                 ret = getter(dev, &eeprom, data);
1538                 if (ret)
1539                         break;
1540                 if (copy_to_user(userbuf, data, eeprom.len)) {
1541                         ret = -EFAULT;
1542                         break;
1543                 }
1544                 userbuf += eeprom.len;
1545                 eeprom.offset += eeprom.len;
1546                 bytes_remaining -= eeprom.len;
1547         }
1548
1549         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1550         eeprom.offset -= eeprom.len;
1551         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1552                 ret = -EFAULT;
1553
1554         kfree(data);
1555         return ret;
1556 }
1557
1558 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1559 {
1560         const struct ethtool_ops *ops = dev->ethtool_ops;
1561
1562         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1563             !ops->get_eeprom_len(dev))
1564                 return -EOPNOTSUPP;
1565
1566         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1567                                       ops->get_eeprom_len(dev));
1568 }
1569
1570 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1571 {
1572         struct ethtool_eeprom eeprom;
1573         const struct ethtool_ops *ops = dev->ethtool_ops;
1574         void __user *userbuf = useraddr + sizeof(eeprom);
1575         u32 bytes_remaining;
1576         u8 *data;
1577         int ret = 0;
1578
1579         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1580             !ops->get_eeprom_len(dev))
1581                 return -EOPNOTSUPP;
1582
1583         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1584                 return -EFAULT;
1585
1586         /* Check for wrap and zero */
1587         if (eeprom.offset + eeprom.len <= eeprom.offset)
1588                 return -EINVAL;
1589
1590         /* Check for exceeding total eeprom len */
1591         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1592                 return -EINVAL;
1593
1594         data = kzalloc(PAGE_SIZE, GFP_USER);
1595         if (!data)
1596                 return -ENOMEM;
1597
1598         bytes_remaining = eeprom.len;
1599         while (bytes_remaining > 0) {
1600                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1601
1602                 if (copy_from_user(data, userbuf, eeprom.len)) {
1603                         ret = -EFAULT;
1604                         break;
1605                 }
1606                 ret = ops->set_eeprom(dev, &eeprom, data);
1607                 if (ret)
1608                         break;
1609                 userbuf += eeprom.len;
1610                 eeprom.offset += eeprom.len;
1611                 bytes_remaining -= eeprom.len;
1612         }
1613
1614         kfree(data);
1615         return ret;
1616 }
1617
1618 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1619                                                    void __user *useraddr)
1620 {
1621         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1622         struct kernel_ethtool_coalesce kernel_coalesce = {};
1623         int ret;
1624
1625         if (!dev->ethtool_ops->get_coalesce)
1626                 return -EOPNOTSUPP;
1627
1628         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1629                                              NULL);
1630         if (ret)
1631                 return ret;
1632
1633         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1634                 return -EFAULT;
1635         return 0;
1636 }
1637
1638 static bool
1639 ethtool_set_coalesce_supported(struct net_device *dev,
1640                                struct ethtool_coalesce *coalesce)
1641 {
1642         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1643         u32 nonzero_params = 0;
1644
1645         if (coalesce->rx_coalesce_usecs)
1646                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1647         if (coalesce->rx_max_coalesced_frames)
1648                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1649         if (coalesce->rx_coalesce_usecs_irq)
1650                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1651         if (coalesce->rx_max_coalesced_frames_irq)
1652                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1653         if (coalesce->tx_coalesce_usecs)
1654                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1655         if (coalesce->tx_max_coalesced_frames)
1656                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1657         if (coalesce->tx_coalesce_usecs_irq)
1658                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1659         if (coalesce->tx_max_coalesced_frames_irq)
1660                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1661         if (coalesce->stats_block_coalesce_usecs)
1662                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1663         if (coalesce->use_adaptive_rx_coalesce)
1664                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1665         if (coalesce->use_adaptive_tx_coalesce)
1666                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1667         if (coalesce->pkt_rate_low)
1668                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1669         if (coalesce->rx_coalesce_usecs_low)
1670                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1671         if (coalesce->rx_max_coalesced_frames_low)
1672                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1673         if (coalesce->tx_coalesce_usecs_low)
1674                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1675         if (coalesce->tx_max_coalesced_frames_low)
1676                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1677         if (coalesce->pkt_rate_high)
1678                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1679         if (coalesce->rx_coalesce_usecs_high)
1680                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1681         if (coalesce->rx_max_coalesced_frames_high)
1682                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1683         if (coalesce->tx_coalesce_usecs_high)
1684                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1685         if (coalesce->tx_max_coalesced_frames_high)
1686                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1687         if (coalesce->rate_sample_interval)
1688                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1689
1690         return (supported_params & nonzero_params) == nonzero_params;
1691 }
1692
1693 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1694                                                    void __user *useraddr)
1695 {
1696         struct kernel_ethtool_coalesce kernel_coalesce = {};
1697         struct ethtool_coalesce coalesce;
1698         int ret;
1699
1700         if (!dev->ethtool_ops->set_coalesce && !dev->ethtool_ops->get_coalesce)
1701                 return -EOPNOTSUPP;
1702
1703         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1704                                              NULL);
1705         if (ret)
1706                 return ret;
1707
1708         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1709                 return -EFAULT;
1710
1711         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1712                 return -EOPNOTSUPP;
1713
1714         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1715                                              NULL);
1716         if (!ret)
1717                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1718         return ret;
1719 }
1720
1721 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1722 {
1723         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1724
1725         if (!dev->ethtool_ops->get_ringparam)
1726                 return -EOPNOTSUPP;
1727
1728         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1729
1730         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1731                 return -EFAULT;
1732         return 0;
1733 }
1734
1735 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1736 {
1737         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1738         int ret;
1739
1740         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1741                 return -EOPNOTSUPP;
1742
1743         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1744                 return -EFAULT;
1745
1746         dev->ethtool_ops->get_ringparam(dev, &max);
1747
1748         /* ensure new ring parameters are within the maximums */
1749         if (ringparam.rx_pending > max.rx_max_pending ||
1750             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1751             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1752             ringparam.tx_pending > max.tx_max_pending)
1753                 return -EINVAL;
1754
1755         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
1756         if (!ret)
1757                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1758         return ret;
1759 }
1760
1761 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1762                                                    void __user *useraddr)
1763 {
1764         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1765
1766         if (!dev->ethtool_ops->get_channels)
1767                 return -EOPNOTSUPP;
1768
1769         dev->ethtool_ops->get_channels(dev, &channels);
1770
1771         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1772                 return -EFAULT;
1773         return 0;
1774 }
1775
1776 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1777                                                    void __user *useraddr)
1778 {
1779         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1780         u16 from_channel, to_channel;
1781         u32 max_rx_in_use = 0;
1782         unsigned int i;
1783         int ret;
1784
1785         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1786                 return -EOPNOTSUPP;
1787
1788         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1789                 return -EFAULT;
1790
1791         dev->ethtool_ops->get_channels(dev, &curr);
1792
1793         if (channels.rx_count == curr.rx_count &&
1794             channels.tx_count == curr.tx_count &&
1795             channels.combined_count == curr.combined_count &&
1796             channels.other_count == curr.other_count)
1797                 return 0;
1798
1799         /* ensure new counts are within the maximums */
1800         if (channels.rx_count > curr.max_rx ||
1801             channels.tx_count > curr.max_tx ||
1802             channels.combined_count > curr.max_combined ||
1803             channels.other_count > curr.max_other)
1804                 return -EINVAL;
1805
1806         /* ensure there is at least one RX and one TX channel */
1807         if (!channels.combined_count &&
1808             (!channels.rx_count || !channels.tx_count))
1809                 return -EINVAL;
1810
1811         /* ensure the new Rx count fits within the configured Rx flow
1812          * indirection table settings */
1813         if (netif_is_rxfh_configured(dev) &&
1814             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1815             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1816             return -EINVAL;
1817
1818         /* Disabling channels, query zero-copy AF_XDP sockets */
1819         from_channel = channels.combined_count +
1820                 min(channels.rx_count, channels.tx_count);
1821         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1822         for (i = from_channel; i < to_channel; i++)
1823                 if (xsk_get_pool_from_qid(dev, i))
1824                         return -EINVAL;
1825
1826         ret = dev->ethtool_ops->set_channels(dev, &channels);
1827         if (!ret)
1828                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1829         return ret;
1830 }
1831
1832 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1833 {
1834         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1835
1836         if (!dev->ethtool_ops->get_pauseparam)
1837                 return -EOPNOTSUPP;
1838
1839         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1840
1841         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1842                 return -EFAULT;
1843         return 0;
1844 }
1845
1846 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1847 {
1848         struct ethtool_pauseparam pauseparam;
1849         int ret;
1850
1851         if (!dev->ethtool_ops->set_pauseparam)
1852                 return -EOPNOTSUPP;
1853
1854         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1855                 return -EFAULT;
1856
1857         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1858         if (!ret)
1859                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1860         return ret;
1861 }
1862
1863 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1864 {
1865         struct ethtool_test test;
1866         const struct ethtool_ops *ops = dev->ethtool_ops;
1867         u64 *data;
1868         int ret, test_len;
1869
1870         if (!ops->self_test || !ops->get_sset_count)
1871                 return -EOPNOTSUPP;
1872
1873         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1874         if (test_len < 0)
1875                 return test_len;
1876         WARN_ON(test_len == 0);
1877
1878         if (copy_from_user(&test, useraddr, sizeof(test)))
1879                 return -EFAULT;
1880
1881         test.len = test_len;
1882         data = kcalloc(test_len, sizeof(u64), GFP_USER);
1883         if (!data)
1884                 return -ENOMEM;
1885
1886         netif_testing_on(dev);
1887         ops->self_test(dev, &test, data);
1888         netif_testing_off(dev);
1889
1890         ret = -EFAULT;
1891         if (copy_to_user(useraddr, &test, sizeof(test)))
1892                 goto out;
1893         useraddr += sizeof(test);
1894         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1895                 goto out;
1896         ret = 0;
1897
1898  out:
1899         kfree(data);
1900         return ret;
1901 }
1902
1903 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1904 {
1905         struct ethtool_gstrings gstrings;
1906         u8 *data;
1907         int ret;
1908
1909         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1910                 return -EFAULT;
1911
1912         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1913         if (ret < 0)
1914                 return ret;
1915         if (ret > S32_MAX / ETH_GSTRING_LEN)
1916                 return -ENOMEM;
1917         WARN_ON_ONCE(!ret);
1918
1919         gstrings.len = ret;
1920
1921         if (gstrings.len) {
1922                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1923                 if (!data)
1924                         return -ENOMEM;
1925
1926                 __ethtool_get_strings(dev, gstrings.string_set, data);
1927         } else {
1928                 data = NULL;
1929         }
1930
1931         ret = -EFAULT;
1932         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1933                 goto out;
1934         useraddr += sizeof(gstrings);
1935         if (gstrings.len &&
1936             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1937                 goto out;
1938         ret = 0;
1939
1940 out:
1941         vfree(data);
1942         return ret;
1943 }
1944
1945 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
1946 {
1947         va_list args;
1948
1949         va_start(args, fmt);
1950         vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
1951         va_end(args);
1952
1953         *data += ETH_GSTRING_LEN;
1954 }
1955 EXPORT_SYMBOL(ethtool_sprintf);
1956
1957 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1958 {
1959         struct ethtool_value id;
1960         static bool busy;
1961         const struct ethtool_ops *ops = dev->ethtool_ops;
1962         int rc;
1963
1964         if (!ops->set_phys_id)
1965                 return -EOPNOTSUPP;
1966
1967         if (busy)
1968                 return -EBUSY;
1969
1970         if (copy_from_user(&id, useraddr, sizeof(id)))
1971                 return -EFAULT;
1972
1973         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1974         if (rc < 0)
1975                 return rc;
1976
1977         /* Drop the RTNL lock while waiting, but prevent reentry or
1978          * removal of the device.
1979          */
1980         busy = true;
1981         dev_hold(dev);
1982         rtnl_unlock();
1983
1984         if (rc == 0) {
1985                 /* Driver will handle this itself */
1986                 schedule_timeout_interruptible(
1987                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1988         } else {
1989                 /* Driver expects to be called at twice the frequency in rc */
1990                 int n = rc * 2, interval = HZ / n;
1991                 u64 count = n * id.data, i = 0;
1992
1993                 do {
1994                         rtnl_lock();
1995                         rc = ops->set_phys_id(dev,
1996                                     (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1997                         rtnl_unlock();
1998                         if (rc)
1999                                 break;
2000                         schedule_timeout_interruptible(interval);
2001                 } while (!signal_pending(current) && (!id.data || i < count));
2002         }
2003
2004         rtnl_lock();
2005         dev_put(dev);
2006         busy = false;
2007
2008         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2009         return rc;
2010 }
2011
2012 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2013 {
2014         struct ethtool_stats stats;
2015         const struct ethtool_ops *ops = dev->ethtool_ops;
2016         u64 *data;
2017         int ret, n_stats;
2018
2019         if (!ops->get_ethtool_stats || !ops->get_sset_count)
2020                 return -EOPNOTSUPP;
2021
2022         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2023         if (n_stats < 0)
2024                 return n_stats;
2025         if (n_stats > S32_MAX / sizeof(u64))
2026                 return -ENOMEM;
2027         WARN_ON_ONCE(!n_stats);
2028         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2029                 return -EFAULT;
2030
2031         stats.n_stats = n_stats;
2032
2033         if (n_stats) {
2034                 data = vzalloc(array_size(n_stats, sizeof(u64)));
2035                 if (!data)
2036                         return -ENOMEM;
2037                 ops->get_ethtool_stats(dev, &stats, data);
2038         } else {
2039                 data = NULL;
2040         }
2041
2042         ret = -EFAULT;
2043         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2044                 goto out;
2045         useraddr += sizeof(stats);
2046         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2047                 goto out;
2048         ret = 0;
2049
2050  out:
2051         vfree(data);
2052         return ret;
2053 }
2054
2055 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2056 {
2057         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2058         const struct ethtool_ops *ops = dev->ethtool_ops;
2059         struct phy_device *phydev = dev->phydev;
2060         struct ethtool_stats stats;
2061         u64 *data;
2062         int ret, n_stats;
2063
2064         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
2065                 return -EOPNOTSUPP;
2066
2067         if (dev->phydev && !ops->get_ethtool_phy_stats &&
2068             phy_ops && phy_ops->get_sset_count)
2069                 n_stats = phy_ops->get_sset_count(dev->phydev);
2070         else
2071                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2072         if (n_stats < 0)
2073                 return n_stats;
2074         if (n_stats > S32_MAX / sizeof(u64))
2075                 return -ENOMEM;
2076         WARN_ON_ONCE(!n_stats);
2077
2078         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2079                 return -EFAULT;
2080
2081         stats.n_stats = n_stats;
2082
2083         if (n_stats) {
2084                 data = vzalloc(array_size(n_stats, sizeof(u64)));
2085                 if (!data)
2086                         return -ENOMEM;
2087
2088                 if (dev->phydev && !ops->get_ethtool_phy_stats &&
2089                     phy_ops && phy_ops->get_stats) {
2090                         ret = phy_ops->get_stats(dev->phydev, &stats, data);
2091                         if (ret < 0)
2092                                 goto out;
2093                 } else {
2094                         ops->get_ethtool_phy_stats(dev, &stats, data);
2095                 }
2096         } else {
2097                 data = NULL;
2098         }
2099
2100         ret = -EFAULT;
2101         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2102                 goto out;
2103         useraddr += sizeof(stats);
2104         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2105                 goto out;
2106         ret = 0;
2107
2108  out:
2109         vfree(data);
2110         return ret;
2111 }
2112
2113 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2114 {
2115         struct ethtool_perm_addr epaddr;
2116
2117         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2118                 return -EFAULT;
2119
2120         if (epaddr.size < dev->addr_len)
2121                 return -ETOOSMALL;
2122         epaddr.size = dev->addr_len;
2123
2124         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2125                 return -EFAULT;
2126         useraddr += sizeof(epaddr);
2127         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2128                 return -EFAULT;
2129         return 0;
2130 }
2131
2132 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2133                              u32 cmd, u32 (*actor)(struct net_device *))
2134 {
2135         struct ethtool_value edata = { .cmd = cmd };
2136
2137         if (!actor)
2138                 return -EOPNOTSUPP;
2139
2140         edata.data = actor(dev);
2141
2142         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2143                 return -EFAULT;
2144         return 0;
2145 }
2146
2147 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2148                              void (*actor)(struct net_device *, u32))
2149 {
2150         struct ethtool_value edata;
2151
2152         if (!actor)
2153                 return -EOPNOTSUPP;
2154
2155         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2156                 return -EFAULT;
2157
2158         actor(dev, edata.data);
2159         return 0;
2160 }
2161
2162 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2163                              int (*actor)(struct net_device *, u32))
2164 {
2165         struct ethtool_value edata;
2166
2167         if (!actor)
2168                 return -EOPNOTSUPP;
2169
2170         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2171                 return -EFAULT;
2172
2173         return actor(dev, edata.data);
2174 }
2175
2176 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2177                                                    char __user *useraddr)
2178 {
2179         struct ethtool_flash efl;
2180
2181         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2182                 return -EFAULT;
2183         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2184
2185         if (!dev->ethtool_ops->flash_device)
2186                 return devlink_compat_flash_update(dev, efl.data);
2187
2188         return dev->ethtool_ops->flash_device(dev, &efl);
2189 }
2190
2191 static int ethtool_set_dump(struct net_device *dev,
2192                         void __user *useraddr)
2193 {
2194         struct ethtool_dump dump;
2195
2196         if (!dev->ethtool_ops->set_dump)
2197                 return -EOPNOTSUPP;
2198
2199         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2200                 return -EFAULT;
2201
2202         return dev->ethtool_ops->set_dump(dev, &dump);
2203 }
2204
2205 static int ethtool_get_dump_flag(struct net_device *dev,
2206                                 void __user *useraddr)
2207 {
2208         int ret;
2209         struct ethtool_dump dump;
2210         const struct ethtool_ops *ops = dev->ethtool_ops;
2211
2212         if (!ops->get_dump_flag)
2213                 return -EOPNOTSUPP;
2214
2215         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2216                 return -EFAULT;
2217
2218         ret = ops->get_dump_flag(dev, &dump);
2219         if (ret)
2220                 return ret;
2221
2222         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2223                 return -EFAULT;
2224         return 0;
2225 }
2226
2227 static int ethtool_get_dump_data(struct net_device *dev,
2228                                 void __user *useraddr)
2229 {
2230         int ret;
2231         __u32 len;
2232         struct ethtool_dump dump, tmp;
2233         const struct ethtool_ops *ops = dev->ethtool_ops;
2234         void *data = NULL;
2235
2236         if (!ops->get_dump_data || !ops->get_dump_flag)
2237                 return -EOPNOTSUPP;
2238
2239         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2240                 return -EFAULT;
2241
2242         memset(&tmp, 0, sizeof(tmp));
2243         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2244         ret = ops->get_dump_flag(dev, &tmp);
2245         if (ret)
2246                 return ret;
2247
2248         len = min(tmp.len, dump.len);
2249         if (!len)
2250                 return -EFAULT;
2251
2252         /* Don't ever let the driver think there's more space available
2253          * than it requested with .get_dump_flag().
2254          */
2255         dump.len = len;
2256
2257         /* Always allocate enough space to hold the whole thing so that the
2258          * driver does not need to check the length and bother with partial
2259          * dumping.
2260          */
2261         data = vzalloc(tmp.len);
2262         if (!data)
2263                 return -ENOMEM;
2264         ret = ops->get_dump_data(dev, &dump, data);
2265         if (ret)
2266                 goto out;
2267
2268         /* There are two sane possibilities:
2269          * 1. The driver's .get_dump_data() does not touch dump.len.
2270          * 2. Or it may set dump.len to how much it really writes, which
2271          *    should be tmp.len (or len if it can do a partial dump).
2272          * In any case respond to userspace with the actual length of data
2273          * it's receiving.
2274          */
2275         WARN_ON(dump.len != len && dump.len != tmp.len);
2276         dump.len = len;
2277
2278         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2279                 ret = -EFAULT;
2280                 goto out;
2281         }
2282         useraddr += offsetof(struct ethtool_dump, data);
2283         if (copy_to_user(useraddr, data, len))
2284                 ret = -EFAULT;
2285 out:
2286         vfree(data);
2287         return ret;
2288 }
2289
2290 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2291 {
2292         struct ethtool_ts_info info;
2293         int err;
2294
2295         err = __ethtool_get_ts_info(dev, &info);
2296         if (err)
2297                 return err;
2298
2299         if (copy_to_user(useraddr, &info, sizeof(info)))
2300                 return -EFAULT;
2301
2302         return 0;
2303 }
2304
2305 int ethtool_get_module_info_call(struct net_device *dev,
2306                                  struct ethtool_modinfo *modinfo)
2307 {
2308         const struct ethtool_ops *ops = dev->ethtool_ops;
2309         struct phy_device *phydev = dev->phydev;
2310
2311         if (dev->sfp_bus)
2312                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2313
2314         if (phydev && phydev->drv && phydev->drv->module_info)
2315                 return phydev->drv->module_info(phydev, modinfo);
2316
2317         if (ops->get_module_info)
2318                 return ops->get_module_info(dev, modinfo);
2319
2320         return -EOPNOTSUPP;
2321 }
2322
2323 static int ethtool_get_module_info(struct net_device *dev,
2324                                    void __user *useraddr)
2325 {
2326         int ret;
2327         struct ethtool_modinfo modinfo;
2328
2329         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2330                 return -EFAULT;
2331
2332         ret = ethtool_get_module_info_call(dev, &modinfo);
2333         if (ret)
2334                 return ret;
2335
2336         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2337                 return -EFAULT;
2338
2339         return 0;
2340 }
2341
2342 int ethtool_get_module_eeprom_call(struct net_device *dev,
2343                                    struct ethtool_eeprom *ee, u8 *data)
2344 {
2345         const struct ethtool_ops *ops = dev->ethtool_ops;
2346         struct phy_device *phydev = dev->phydev;
2347
2348         if (dev->sfp_bus)
2349                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2350
2351         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2352                 return phydev->drv->module_eeprom(phydev, ee, data);
2353
2354         if (ops->get_module_eeprom)
2355                 return ops->get_module_eeprom(dev, ee, data);
2356
2357         return -EOPNOTSUPP;
2358 }
2359
2360 static int ethtool_get_module_eeprom(struct net_device *dev,
2361                                      void __user *useraddr)
2362 {
2363         int ret;
2364         struct ethtool_modinfo modinfo;
2365
2366         ret = ethtool_get_module_info_call(dev, &modinfo);
2367         if (ret)
2368                 return ret;
2369
2370         return ethtool_get_any_eeprom(dev, useraddr,
2371                                       ethtool_get_module_eeprom_call,
2372                                       modinfo.eeprom_len);
2373 }
2374
2375 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2376 {
2377         switch (tuna->id) {
2378         case ETHTOOL_RX_COPYBREAK:
2379         case ETHTOOL_TX_COPYBREAK:
2380                 if (tuna->len != sizeof(u32) ||
2381                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2382                         return -EINVAL;
2383                 break;
2384         case ETHTOOL_PFC_PREVENTION_TOUT:
2385                 if (tuna->len != sizeof(u16) ||
2386                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2387                         return -EINVAL;
2388                 break;
2389         default:
2390                 return -EINVAL;
2391         }
2392
2393         return 0;
2394 }
2395
2396 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2397 {
2398         int ret;
2399         struct ethtool_tunable tuna;
2400         const struct ethtool_ops *ops = dev->ethtool_ops;
2401         void *data;
2402
2403         if (!ops->get_tunable)
2404                 return -EOPNOTSUPP;
2405         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2406                 return -EFAULT;
2407         ret = ethtool_tunable_valid(&tuna);
2408         if (ret)
2409                 return ret;
2410         data = kzalloc(tuna.len, GFP_USER);
2411         if (!data)
2412                 return -ENOMEM;
2413         ret = ops->get_tunable(dev, &tuna, data);
2414         if (ret)
2415                 goto out;
2416         useraddr += sizeof(tuna);
2417         ret = -EFAULT;
2418         if (copy_to_user(useraddr, data, tuna.len))
2419                 goto out;
2420         ret = 0;
2421
2422 out:
2423         kfree(data);
2424         return ret;
2425 }
2426
2427 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2428 {
2429         int ret;
2430         struct ethtool_tunable tuna;
2431         const struct ethtool_ops *ops = dev->ethtool_ops;
2432         void *data;
2433
2434         if (!ops->set_tunable)
2435                 return -EOPNOTSUPP;
2436         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2437                 return -EFAULT;
2438         ret = ethtool_tunable_valid(&tuna);
2439         if (ret)
2440                 return ret;
2441         useraddr += sizeof(tuna);
2442         data = memdup_user(useraddr, tuna.len);
2443         if (IS_ERR(data))
2444                 return PTR_ERR(data);
2445         ret = ops->set_tunable(dev, &tuna, data);
2446
2447         kfree(data);
2448         return ret;
2449 }
2450
2451 static noinline_for_stack int
2452 ethtool_get_per_queue_coalesce(struct net_device *dev,
2453                                void __user *useraddr,
2454                                struct ethtool_per_queue_op *per_queue_opt)
2455 {
2456         u32 bit;
2457         int ret;
2458         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2459
2460         if (!dev->ethtool_ops->get_per_queue_coalesce)
2461                 return -EOPNOTSUPP;
2462
2463         useraddr += sizeof(*per_queue_opt);
2464
2465         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2466                           MAX_NUM_QUEUE);
2467
2468         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2469                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2470
2471                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2472                 if (ret != 0)
2473                         return ret;
2474                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2475                         return -EFAULT;
2476                 useraddr += sizeof(coalesce);
2477         }
2478
2479         return 0;
2480 }
2481
2482 static noinline_for_stack int
2483 ethtool_set_per_queue_coalesce(struct net_device *dev,
2484                                void __user *useraddr,
2485                                struct ethtool_per_queue_op *per_queue_opt)
2486 {
2487         u32 bit;
2488         int i, ret = 0;
2489         int n_queue;
2490         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2491         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2492
2493         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2494             (!dev->ethtool_ops->get_per_queue_coalesce))
2495                 return -EOPNOTSUPP;
2496
2497         useraddr += sizeof(*per_queue_opt);
2498
2499         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2500         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2501         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2502         if (!backup)
2503                 return -ENOMEM;
2504
2505         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2506                 struct ethtool_coalesce coalesce;
2507
2508                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2509                 if (ret != 0)
2510                         goto roll_back;
2511
2512                 tmp++;
2513
2514                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2515                         ret = -EFAULT;
2516                         goto roll_back;
2517                 }
2518
2519                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2520                         ret = -EOPNOTSUPP;
2521                         goto roll_back;
2522                 }
2523
2524                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2525                 if (ret != 0)
2526                         goto roll_back;
2527
2528                 useraddr += sizeof(coalesce);
2529         }
2530
2531 roll_back:
2532         if (ret != 0) {
2533                 tmp = backup;
2534                 for_each_set_bit(i, queue_mask, bit) {
2535                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2536                         tmp++;
2537                 }
2538         }
2539         kfree(backup);
2540
2541         return ret;
2542 }
2543
2544 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2545                                  void __user *useraddr, u32 sub_cmd)
2546 {
2547         struct ethtool_per_queue_op per_queue_opt;
2548
2549         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2550                 return -EFAULT;
2551
2552         if (per_queue_opt.sub_command != sub_cmd)
2553                 return -EINVAL;
2554
2555         switch (per_queue_opt.sub_command) {
2556         case ETHTOOL_GCOALESCE:
2557                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2558         case ETHTOOL_SCOALESCE:
2559                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2560         default:
2561                 return -EOPNOTSUPP;
2562         }
2563 }
2564
2565 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2566 {
2567         switch (tuna->id) {
2568         case ETHTOOL_PHY_DOWNSHIFT:
2569         case ETHTOOL_PHY_FAST_LINK_DOWN:
2570                 if (tuna->len != sizeof(u8) ||
2571                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2572                         return -EINVAL;
2573                 break;
2574         case ETHTOOL_PHY_EDPD:
2575                 if (tuna->len != sizeof(u16) ||
2576                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2577                         return -EINVAL;
2578                 break;
2579         default:
2580                 return -EINVAL;
2581         }
2582
2583         return 0;
2584 }
2585
2586 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2587 {
2588         struct phy_device *phydev = dev->phydev;
2589         struct ethtool_tunable tuna;
2590         bool phy_drv_tunable;
2591         void *data;
2592         int ret;
2593
2594         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2595         if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2596                 return -EOPNOTSUPP;
2597         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2598                 return -EFAULT;
2599         ret = ethtool_phy_tunable_valid(&tuna);
2600         if (ret)
2601                 return ret;
2602         data = kzalloc(tuna.len, GFP_USER);
2603         if (!data)
2604                 return -ENOMEM;
2605         if (phy_drv_tunable) {
2606                 mutex_lock(&phydev->lock);
2607                 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2608                 mutex_unlock(&phydev->lock);
2609         } else {
2610                 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2611         }
2612         if (ret)
2613                 goto out;
2614         useraddr += sizeof(tuna);
2615         ret = -EFAULT;
2616         if (copy_to_user(useraddr, data, tuna.len))
2617                 goto out;
2618         ret = 0;
2619
2620 out:
2621         kfree(data);
2622         return ret;
2623 }
2624
2625 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2626 {
2627         struct phy_device *phydev = dev->phydev;
2628         struct ethtool_tunable tuna;
2629         bool phy_drv_tunable;
2630         void *data;
2631         int ret;
2632
2633         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2634         if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2635                 return -EOPNOTSUPP;
2636         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2637                 return -EFAULT;
2638         ret = ethtool_phy_tunable_valid(&tuna);
2639         if (ret)
2640                 return ret;
2641         useraddr += sizeof(tuna);
2642         data = memdup_user(useraddr, tuna.len);
2643         if (IS_ERR(data))
2644                 return PTR_ERR(data);
2645         if (phy_drv_tunable) {
2646                 mutex_lock(&phydev->lock);
2647                 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2648                 mutex_unlock(&phydev->lock);
2649         } else {
2650                 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2651         }
2652
2653         kfree(data);
2654         return ret;
2655 }
2656
2657 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2658 {
2659         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2660         int rc;
2661
2662         if (!dev->ethtool_ops->get_fecparam)
2663                 return -EOPNOTSUPP;
2664
2665         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2666         if (rc)
2667                 return rc;
2668
2669         if (WARN_ON_ONCE(fecparam.reserved))
2670                 fecparam.reserved = 0;
2671
2672         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2673                 return -EFAULT;
2674         return 0;
2675 }
2676
2677 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2678 {
2679         struct ethtool_fecparam fecparam;
2680
2681         if (!dev->ethtool_ops->set_fecparam)
2682                 return -EOPNOTSUPP;
2683
2684         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2685                 return -EFAULT;
2686
2687         if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2688                 return -EINVAL;
2689
2690         fecparam.active_fec = 0;
2691         fecparam.reserved = 0;
2692
2693         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2694 }
2695
2696 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2697
2698 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
2699 {
2700         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2701         u32 ethcmd, sub_cmd;
2702         int rc;
2703         netdev_features_t old_features;
2704
2705         if (!dev)
2706                 return -ENODEV;
2707
2708         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2709                 return -EFAULT;
2710
2711         if (ethcmd == ETHTOOL_PERQUEUE) {
2712                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2713                         return -EFAULT;
2714         } else {
2715                 sub_cmd = ethcmd;
2716         }
2717         /* Allow some commands to be done by anyone */
2718         switch (sub_cmd) {
2719         case ETHTOOL_GSET:
2720         case ETHTOOL_GDRVINFO:
2721         case ETHTOOL_GMSGLVL:
2722         case ETHTOOL_GLINK:
2723         case ETHTOOL_GCOALESCE:
2724         case ETHTOOL_GRINGPARAM:
2725         case ETHTOOL_GPAUSEPARAM:
2726         case ETHTOOL_GRXCSUM:
2727         case ETHTOOL_GTXCSUM:
2728         case ETHTOOL_GSG:
2729         case ETHTOOL_GSSET_INFO:
2730         case ETHTOOL_GSTRINGS:
2731         case ETHTOOL_GSTATS:
2732         case ETHTOOL_GPHYSTATS:
2733         case ETHTOOL_GTSO:
2734         case ETHTOOL_GPERMADDR:
2735         case ETHTOOL_GUFO:
2736         case ETHTOOL_GGSO:
2737         case ETHTOOL_GGRO:
2738         case ETHTOOL_GFLAGS:
2739         case ETHTOOL_GPFLAGS:
2740         case ETHTOOL_GRXFH:
2741         case ETHTOOL_GRXRINGS:
2742         case ETHTOOL_GRXCLSRLCNT:
2743         case ETHTOOL_GRXCLSRULE:
2744         case ETHTOOL_GRXCLSRLALL:
2745         case ETHTOOL_GRXFHINDIR:
2746         case ETHTOOL_GRSSH:
2747         case ETHTOOL_GFEATURES:
2748         case ETHTOOL_GCHANNELS:
2749         case ETHTOOL_GET_TS_INFO:
2750         case ETHTOOL_GEEE:
2751         case ETHTOOL_GTUNABLE:
2752         case ETHTOOL_PHY_GTUNABLE:
2753         case ETHTOOL_GLINKSETTINGS:
2754         case ETHTOOL_GFECPARAM:
2755                 break;
2756         default:
2757                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2758                         return -EPERM;
2759         }
2760
2761         if (dev->dev.parent)
2762                 pm_runtime_get_sync(dev->dev.parent);
2763
2764         if (!netif_device_present(dev)) {
2765                 rc = -ENODEV;
2766                 goto out;
2767         }
2768
2769         if (dev->ethtool_ops->begin) {
2770                 rc = dev->ethtool_ops->begin(dev);
2771                 if (rc < 0)
2772                         goto out;
2773         }
2774         old_features = dev->features;
2775
2776         switch (ethcmd) {
2777         case ETHTOOL_GSET:
2778                 rc = ethtool_get_settings(dev, useraddr);
2779                 break;
2780         case ETHTOOL_SSET:
2781                 rc = ethtool_set_settings(dev, useraddr);
2782                 break;
2783         case ETHTOOL_GDRVINFO:
2784                 rc = ethtool_get_drvinfo(dev, useraddr);
2785                 break;
2786         case ETHTOOL_GREGS:
2787                 rc = ethtool_get_regs(dev, useraddr);
2788                 break;
2789         case ETHTOOL_GWOL:
2790                 rc = ethtool_get_wol(dev, useraddr);
2791                 break;
2792         case ETHTOOL_SWOL:
2793                 rc = ethtool_set_wol(dev, useraddr);
2794                 break;
2795         case ETHTOOL_GMSGLVL:
2796                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2797                                        dev->ethtool_ops->get_msglevel);
2798                 break;
2799         case ETHTOOL_SMSGLVL:
2800                 rc = ethtool_set_value_void(dev, useraddr,
2801                                        dev->ethtool_ops->set_msglevel);
2802                 if (!rc)
2803                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2804                 break;
2805         case ETHTOOL_GEEE:
2806                 rc = ethtool_get_eee(dev, useraddr);
2807                 break;
2808         case ETHTOOL_SEEE:
2809                 rc = ethtool_set_eee(dev, useraddr);
2810                 break;
2811         case ETHTOOL_NWAY_RST:
2812                 rc = ethtool_nway_reset(dev);
2813                 break;
2814         case ETHTOOL_GLINK:
2815                 rc = ethtool_get_link(dev, useraddr);
2816                 break;
2817         case ETHTOOL_GEEPROM:
2818                 rc = ethtool_get_eeprom(dev, useraddr);
2819                 break;
2820         case ETHTOOL_SEEPROM:
2821                 rc = ethtool_set_eeprom(dev, useraddr);
2822                 break;
2823         case ETHTOOL_GCOALESCE:
2824                 rc = ethtool_get_coalesce(dev, useraddr);
2825                 break;
2826         case ETHTOOL_SCOALESCE:
2827                 rc = ethtool_set_coalesce(dev, useraddr);
2828                 break;
2829         case ETHTOOL_GRINGPARAM:
2830                 rc = ethtool_get_ringparam(dev, useraddr);
2831                 break;
2832         case ETHTOOL_SRINGPARAM:
2833                 rc = ethtool_set_ringparam(dev, useraddr);
2834                 break;
2835         case ETHTOOL_GPAUSEPARAM:
2836                 rc = ethtool_get_pauseparam(dev, useraddr);
2837                 break;
2838         case ETHTOOL_SPAUSEPARAM:
2839                 rc = ethtool_set_pauseparam(dev, useraddr);
2840                 break;
2841         case ETHTOOL_TEST:
2842                 rc = ethtool_self_test(dev, useraddr);
2843                 break;
2844         case ETHTOOL_GSTRINGS:
2845                 rc = ethtool_get_strings(dev, useraddr);
2846                 break;
2847         case ETHTOOL_PHYS_ID:
2848                 rc = ethtool_phys_id(dev, useraddr);
2849                 break;
2850         case ETHTOOL_GSTATS:
2851                 rc = ethtool_get_stats(dev, useraddr);
2852                 break;
2853         case ETHTOOL_GPERMADDR:
2854                 rc = ethtool_get_perm_addr(dev, useraddr);
2855                 break;
2856         case ETHTOOL_GFLAGS:
2857                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2858                                         __ethtool_get_flags);
2859                 break;
2860         case ETHTOOL_SFLAGS:
2861                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2862                 break;
2863         case ETHTOOL_GPFLAGS:
2864                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2865                                        dev->ethtool_ops->get_priv_flags);
2866                 if (!rc)
2867                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2868                 break;
2869         case ETHTOOL_SPFLAGS:
2870                 rc = ethtool_set_value(dev, useraddr,
2871                                        dev->ethtool_ops->set_priv_flags);
2872                 break;
2873         case ETHTOOL_GRXFH:
2874         case ETHTOOL_GRXRINGS:
2875         case ETHTOOL_GRXCLSRLCNT:
2876         case ETHTOOL_GRXCLSRULE:
2877         case ETHTOOL_GRXCLSRLALL:
2878                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2879                 break;
2880         case ETHTOOL_SRXFH:
2881         case ETHTOOL_SRXCLSRLDEL:
2882         case ETHTOOL_SRXCLSRLINS:
2883                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2884                 break;
2885         case ETHTOOL_FLASHDEV:
2886                 rc = ethtool_flash_device(dev, useraddr);
2887                 break;
2888         case ETHTOOL_RESET:
2889                 rc = ethtool_reset(dev, useraddr);
2890                 break;
2891         case ETHTOOL_GSSET_INFO:
2892                 rc = ethtool_get_sset_info(dev, useraddr);
2893                 break;
2894         case ETHTOOL_GRXFHINDIR:
2895                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2896                 break;
2897         case ETHTOOL_SRXFHINDIR:
2898                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2899                 break;
2900         case ETHTOOL_GRSSH:
2901                 rc = ethtool_get_rxfh(dev, useraddr);
2902                 break;
2903         case ETHTOOL_SRSSH:
2904                 rc = ethtool_set_rxfh(dev, useraddr);
2905                 break;
2906         case ETHTOOL_GFEATURES:
2907                 rc = ethtool_get_features(dev, useraddr);
2908                 break;
2909         case ETHTOOL_SFEATURES:
2910                 rc = ethtool_set_features(dev, useraddr);
2911                 break;
2912         case ETHTOOL_GTXCSUM:
2913         case ETHTOOL_GRXCSUM:
2914         case ETHTOOL_GSG:
2915         case ETHTOOL_GTSO:
2916         case ETHTOOL_GGSO:
2917         case ETHTOOL_GGRO:
2918                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2919                 break;
2920         case ETHTOOL_STXCSUM:
2921         case ETHTOOL_SRXCSUM:
2922         case ETHTOOL_SSG:
2923         case ETHTOOL_STSO:
2924         case ETHTOOL_SGSO:
2925         case ETHTOOL_SGRO:
2926                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2927                 break;
2928         case ETHTOOL_GCHANNELS:
2929                 rc = ethtool_get_channels(dev, useraddr);
2930                 break;
2931         case ETHTOOL_SCHANNELS:
2932                 rc = ethtool_set_channels(dev, useraddr);
2933                 break;
2934         case ETHTOOL_SET_DUMP:
2935                 rc = ethtool_set_dump(dev, useraddr);
2936                 break;
2937         case ETHTOOL_GET_DUMP_FLAG:
2938                 rc = ethtool_get_dump_flag(dev, useraddr);
2939                 break;
2940         case ETHTOOL_GET_DUMP_DATA:
2941                 rc = ethtool_get_dump_data(dev, useraddr);
2942                 break;
2943         case ETHTOOL_GET_TS_INFO:
2944                 rc = ethtool_get_ts_info(dev, useraddr);
2945                 break;
2946         case ETHTOOL_GMODULEINFO:
2947                 rc = ethtool_get_module_info(dev, useraddr);
2948                 break;
2949         case ETHTOOL_GMODULEEEPROM:
2950                 rc = ethtool_get_module_eeprom(dev, useraddr);
2951                 break;
2952         case ETHTOOL_GTUNABLE:
2953                 rc = ethtool_get_tunable(dev, useraddr);
2954                 break;
2955         case ETHTOOL_STUNABLE:
2956                 rc = ethtool_set_tunable(dev, useraddr);
2957                 break;
2958         case ETHTOOL_GPHYSTATS:
2959                 rc = ethtool_get_phy_stats(dev, useraddr);
2960                 break;
2961         case ETHTOOL_PERQUEUE:
2962                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2963                 break;
2964         case ETHTOOL_GLINKSETTINGS:
2965                 rc = ethtool_get_link_ksettings(dev, useraddr);
2966                 break;
2967         case ETHTOOL_SLINKSETTINGS:
2968                 rc = ethtool_set_link_ksettings(dev, useraddr);
2969                 break;
2970         case ETHTOOL_PHY_GTUNABLE:
2971                 rc = get_phy_tunable(dev, useraddr);
2972                 break;
2973         case ETHTOOL_PHY_STUNABLE:
2974                 rc = set_phy_tunable(dev, useraddr);
2975                 break;
2976         case ETHTOOL_GFECPARAM:
2977                 rc = ethtool_get_fecparam(dev, useraddr);
2978                 break;
2979         case ETHTOOL_SFECPARAM:
2980                 rc = ethtool_set_fecparam(dev, useraddr);
2981                 break;
2982         default:
2983                 rc = -EOPNOTSUPP;
2984         }
2985
2986         if (dev->ethtool_ops->complete)
2987                 dev->ethtool_ops->complete(dev);
2988
2989         if (old_features != dev->features)
2990                 netdev_features_change(dev);
2991 out:
2992         if (dev->dev.parent)
2993                 pm_runtime_put(dev->dev.parent);
2994
2995         return rc;
2996 }
2997
2998 struct ethtool_rx_flow_key {
2999         struct flow_dissector_key_basic                 basic;
3000         union {
3001                 struct flow_dissector_key_ipv4_addrs    ipv4;
3002                 struct flow_dissector_key_ipv6_addrs    ipv6;
3003         };
3004         struct flow_dissector_key_ports                 tp;
3005         struct flow_dissector_key_ip                    ip;
3006         struct flow_dissector_key_vlan                  vlan;
3007         struct flow_dissector_key_eth_addrs             eth_addrs;
3008 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3009
3010 struct ethtool_rx_flow_match {
3011         struct flow_dissector           dissector;
3012         struct ethtool_rx_flow_key      key;
3013         struct ethtool_rx_flow_key      mask;
3014 };
3015
3016 struct ethtool_rx_flow_rule *
3017 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3018 {
3019         const struct ethtool_rx_flow_spec *fs = input->fs;
3020         static struct in6_addr zero_addr = {};
3021         struct ethtool_rx_flow_match *match;
3022         struct ethtool_rx_flow_rule *flow;
3023         struct flow_action_entry *act;
3024
3025         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3026                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3027         if (!flow)
3028                 return ERR_PTR(-ENOMEM);
3029
3030         /* ethtool_rx supports only one single action per rule. */
3031         flow->rule = flow_rule_alloc(1);
3032         if (!flow->rule) {
3033                 kfree(flow);
3034                 return ERR_PTR(-ENOMEM);
3035         }
3036
3037         match = (struct ethtool_rx_flow_match *)flow->priv;
3038         flow->rule->match.dissector     = &match->dissector;
3039         flow->rule->match.mask          = &match->mask;
3040         flow->rule->match.key           = &match->key;
3041
3042         match->mask.basic.n_proto = htons(0xffff);
3043
3044         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3045         case ETHER_FLOW: {
3046                 const struct ethhdr *ether_spec, *ether_m_spec;
3047
3048                 ether_spec = &fs->h_u.ether_spec;
3049                 ether_m_spec = &fs->m_u.ether_spec;
3050
3051                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3052                         ether_addr_copy(match->key.eth_addrs.src,
3053                                         ether_spec->h_source);
3054                         ether_addr_copy(match->mask.eth_addrs.src,
3055                                         ether_m_spec->h_source);
3056                 }
3057                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3058                         ether_addr_copy(match->key.eth_addrs.dst,
3059                                         ether_spec->h_dest);
3060                         ether_addr_copy(match->mask.eth_addrs.dst,
3061                                         ether_m_spec->h_dest);
3062                 }
3063                 if (ether_m_spec->h_proto) {
3064                         match->key.basic.n_proto = ether_spec->h_proto;
3065                         match->mask.basic.n_proto = ether_m_spec->h_proto;
3066                 }
3067                 }
3068                 break;
3069         case TCP_V4_FLOW:
3070         case UDP_V4_FLOW: {
3071                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3072
3073                 match->key.basic.n_proto = htons(ETH_P_IP);
3074
3075                 v4_spec = &fs->h_u.tcp_ip4_spec;
3076                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3077
3078                 if (v4_m_spec->ip4src) {
3079                         match->key.ipv4.src = v4_spec->ip4src;
3080                         match->mask.ipv4.src = v4_m_spec->ip4src;
3081                 }
3082                 if (v4_m_spec->ip4dst) {
3083                         match->key.ipv4.dst = v4_spec->ip4dst;
3084                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
3085                 }
3086                 if (v4_m_spec->ip4src ||
3087                     v4_m_spec->ip4dst) {
3088                         match->dissector.used_keys |=
3089                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3090                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3091                                 offsetof(struct ethtool_rx_flow_key, ipv4);
3092                 }
3093                 if (v4_m_spec->psrc) {
3094                         match->key.tp.src = v4_spec->psrc;
3095                         match->mask.tp.src = v4_m_spec->psrc;
3096                 }
3097                 if (v4_m_spec->pdst) {
3098                         match->key.tp.dst = v4_spec->pdst;
3099                         match->mask.tp.dst = v4_m_spec->pdst;
3100                 }
3101                 if (v4_m_spec->psrc ||
3102                     v4_m_spec->pdst) {
3103                         match->dissector.used_keys |=
3104                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
3105                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3106                                 offsetof(struct ethtool_rx_flow_key, tp);
3107                 }
3108                 if (v4_m_spec->tos) {
3109                         match->key.ip.tos = v4_spec->tos;
3110                         match->mask.ip.tos = v4_m_spec->tos;
3111                         match->dissector.used_keys |=
3112                                 BIT(FLOW_DISSECTOR_KEY_IP);
3113                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3114                                 offsetof(struct ethtool_rx_flow_key, ip);
3115                 }
3116                 }
3117                 break;
3118         case TCP_V6_FLOW:
3119         case UDP_V6_FLOW: {
3120                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3121
3122                 match->key.basic.n_proto = htons(ETH_P_IPV6);
3123
3124                 v6_spec = &fs->h_u.tcp_ip6_spec;
3125                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3126                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
3127                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3128                                sizeof(match->key.ipv6.src));
3129                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3130                                sizeof(match->mask.ipv6.src));
3131                 }
3132                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3133                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3134                                sizeof(match->key.ipv6.dst));
3135                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3136                                sizeof(match->mask.ipv6.dst));
3137                 }
3138                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
3139                     memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3140                         match->dissector.used_keys |=
3141                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3142                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3143                                 offsetof(struct ethtool_rx_flow_key, ipv6);
3144                 }
3145                 if (v6_m_spec->psrc) {
3146                         match->key.tp.src = v6_spec->psrc;
3147                         match->mask.tp.src = v6_m_spec->psrc;
3148                 }
3149                 if (v6_m_spec->pdst) {
3150                         match->key.tp.dst = v6_spec->pdst;
3151                         match->mask.tp.dst = v6_m_spec->pdst;
3152                 }
3153                 if (v6_m_spec->psrc ||
3154                     v6_m_spec->pdst) {
3155                         match->dissector.used_keys |=
3156                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
3157                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3158                                 offsetof(struct ethtool_rx_flow_key, tp);
3159                 }
3160                 if (v6_m_spec->tclass) {
3161                         match->key.ip.tos = v6_spec->tclass;
3162                         match->mask.ip.tos = v6_m_spec->tclass;
3163                         match->dissector.used_keys |=
3164                                 BIT(FLOW_DISSECTOR_KEY_IP);
3165                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3166                                 offsetof(struct ethtool_rx_flow_key, ip);
3167                 }
3168                 }
3169                 break;
3170         default:
3171                 ethtool_rx_flow_rule_destroy(flow);
3172                 return ERR_PTR(-EINVAL);
3173         }
3174
3175         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3176         case TCP_V4_FLOW:
3177         case TCP_V6_FLOW:
3178                 match->key.basic.ip_proto = IPPROTO_TCP;
3179                 match->mask.basic.ip_proto = 0xff;
3180                 break;
3181         case UDP_V4_FLOW:
3182         case UDP_V6_FLOW:
3183                 match->key.basic.ip_proto = IPPROTO_UDP;
3184                 match->mask.basic.ip_proto = 0xff;
3185                 break;
3186         }
3187
3188         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3189         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3190                 offsetof(struct ethtool_rx_flow_key, basic);
3191
3192         if (fs->flow_type & FLOW_EXT) {
3193                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3194                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3195
3196                 if (ext_m_spec->vlan_etype) {
3197                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3198                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3199                 }
3200
3201                 if (ext_m_spec->vlan_tci) {
3202                         match->key.vlan.vlan_id =
3203                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3204                         match->mask.vlan.vlan_id =
3205                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3206
3207                         match->key.vlan.vlan_dei =
3208                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3209                         match->mask.vlan.vlan_dei =
3210                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3211
3212                         match->key.vlan.vlan_priority =
3213                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3214                         match->mask.vlan.vlan_priority =
3215                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3216                 }
3217
3218                 if (ext_m_spec->vlan_etype ||
3219                     ext_m_spec->vlan_tci) {
3220                         match->dissector.used_keys |=
3221                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
3222                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3223                                 offsetof(struct ethtool_rx_flow_key, vlan);
3224                 }
3225         }
3226         if (fs->flow_type & FLOW_MAC_EXT) {
3227                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3228                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3229
3230                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3231                        ETH_ALEN);
3232                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3233                        ETH_ALEN);
3234
3235                 match->dissector.used_keys |=
3236                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3237                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3238                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3239         }
3240
3241         act = &flow->rule->action.entries[0];
3242         switch (fs->ring_cookie) {
3243         case RX_CLS_FLOW_DISC:
3244                 act->id = FLOW_ACTION_DROP;
3245                 break;
3246         case RX_CLS_FLOW_WAKE:
3247                 act->id = FLOW_ACTION_WAKE;
3248                 break;
3249         default:
3250                 act->id = FLOW_ACTION_QUEUE;
3251                 if (fs->flow_type & FLOW_RSS)
3252                         act->queue.ctx = input->rss_ctx;
3253
3254                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3255                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3256                 break;
3257         }
3258
3259         return flow;
3260 }
3261 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3262
3263 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3264 {
3265         kfree(flow->rule);
3266         kfree(flow);
3267 }
3268 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);