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 <[email protected]>
   5  *
   6  * This file is where we call all the ethtool_ops commands to get
   7  * the information ethtool needs.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/types.h>
  12 #include <linux/capability.h>
  13 #include <linux/errno.h>
  14 #include <linux/ethtool.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/net_tstamp.h>
  17 #include <linux/phy.h>
  18 #include <linux/bitops.h>
  19 #include <linux/uaccess.h>
  20 #include <linux/vmalloc.h>
  21 #include <linux/sfp.h>
  22 #include <linux/slab.h>
  23 #include <linux/rtnetlink.h>
  24 #include <linux/sched/signal.h>
  25 #include <linux/net.h>
  26 #include <net/devlink.h>
  27 #include <net/xdp_sock_drv.h>
  28 #include <net/flow_offload.h>
  29 #include <linux/ethtool_netlink.h>
  30 #include <generated/utsrelease.h>
  31 #include "common.h"
  32
  33 /*
  34  * Some useful ethtool_ops methods that're device independent.
  35  * If we find that all drivers want to do the same thing here,
  36  * we can turn these into dev_() function calls.
  37  */
  38
  39 u32 ethtool_op_get_link(struct net_device *dev)
  40 {
  41         return netif_carrier_ok(dev) ? 1 : 0;
  42 }
  43 EXPORT_SYMBOL(ethtool_op_get_link);
  44
  45 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  46 {
  47         info->so_timestamping =
  48                 SOF_TIMESTAMPING_TX_SOFTWARE |
  49                 SOF_TIMESTAMPING_RX_SOFTWARE |
  50                 SOF_TIMESTAMPING_SOFTWARE;
  51         info->phc_index = -1;
  52         return 0;
  53 }
  54 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  55
  56 /* Handlers for each ethtool command */
  57
  58 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  59 {
  60         struct ethtool_gfeatures cmd = {
  61                 .cmd = ETHTOOL_GFEATURES,
  62                 .size = ETHTOOL_DEV_FEATURE_WORDS,
  63         };
  64         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  65         u32 __user *sizeaddr;
  66         u32 copy_size;
  67         int i;
  68
  69         /* in case feature bits run out again */
  70         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  71
  72         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  73                 features[i].available = (u32)(dev->hw_features >> (32 * i));
  74                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
  75                 features[i].active = (u32)(dev->features >> (32 * i));
  76                 features[i].never_changed =
  77                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
  78         }
  79
  80         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
  81         if (get_user(copy_size, sizeaddr))
  82                 return -EFAULT;
  83
  84         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
  85                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
  86
  87         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
  88                 return -EFAULT;
  89         useraddr += sizeof(cmd);
  90         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
  91                 return -EFAULT;
  92
  93         return 0;
  94 }
  95
  96 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
  97 {
  98         struct ethtool_sfeatures cmd;
  99         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 100         netdev_features_t wanted = 0, valid = 0;
 101         int i, ret = 0;
 102
 103         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 104                 return -EFAULT;
 105         useraddr += sizeof(cmd);
 106
 107         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 108                 return -EINVAL;
 109
 110         if (copy_from_user(features, useraddr, sizeof(features)))
 111                 return -EFAULT;
 112
 113         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 114                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 115                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 116         }
 117
 118         if (valid & ~NETIF_F_ETHTOOL_BITS)
 119                 return -EINVAL;
 120
 121         if (valid & ~dev->hw_features) {
 122                 valid &= dev->hw_features;
 123                 ret |= ETHTOOL_F_UNSUPPORTED;
 124         }
 125
 126         dev->wanted_features &= ~valid;
 127         dev->wanted_features |= wanted & valid;
 128         __netdev_update_features(dev);
 129
 130         if ((dev->wanted_features ^ dev->features) & valid)
 131                 ret |= ETHTOOL_F_WISH;
 132
 133         return ret;
 134 }
 135
 136 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 137 {
 138         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 139         const struct ethtool_ops *ops = dev->ethtool_ops;
 140
 141         if (sset == ETH_SS_FEATURES)
 142                 return ARRAY_SIZE(netdev_features_strings);
 143
 144         if (sset == ETH_SS_RSS_HASH_FUNCS)
 145                 return ARRAY_SIZE(rss_hash_func_strings);
 146
 147         if (sset == ETH_SS_TUNABLES)
 148                 return ARRAY_SIZE(tunable_strings);
 149
 150         if (sset == ETH_SS_PHY_TUNABLES)
 151                 return ARRAY_SIZE(phy_tunable_strings);
 152
 153         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 154             !ops->get_ethtool_phy_stats &&
 155             phy_ops && phy_ops->get_sset_count)
 156                 return phy_ops->get_sset_count(dev->phydev);
 157
 158         if (sset == ETH_SS_LINK_MODES)
 159                 return __ETHTOOL_LINK_MODE_MASK_NBITS;
 160
 161         if (ops->get_sset_count && ops->get_strings)
 162                 return ops->get_sset_count(dev, sset);
 163         else
 164                 return -EOPNOTSUPP;
 165 }
 166
 167 static void __ethtool_get_strings(struct net_device *dev,
 168         u32 stringset, u8 *data)
 169 {
 170         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 171         const struct ethtool_ops *ops = dev->ethtool_ops;
 172
 173         if (stringset == ETH_SS_FEATURES)
 174                 memcpy(data, netdev_features_strings,
 175                         sizeof(netdev_features_strings));
 176         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 177                 memcpy(data, rss_hash_func_strings,
 178                        sizeof(rss_hash_func_strings));
 179         else if (stringset == ETH_SS_TUNABLES)
 180                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 181         else if (stringset == ETH_SS_PHY_TUNABLES)
 182                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 183         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 184                  !ops->get_ethtool_phy_stats && phy_ops &&
 185                  phy_ops->get_strings)
 186                 phy_ops->get_strings(dev->phydev, data);
 187         else if (stringset == ETH_SS_LINK_MODES)
 188                 memcpy(data, link_mode_names,
 189                        __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 190         else
 191                 /* ops->get_strings is valid because checked earlier */
 192                 ops->get_strings(dev, stringset, data);
 193 }
 194
 195 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 196 {
 197         /* feature masks of legacy discrete ethtool ops */
 198
 199         switch (eth_cmd) {
 200         case ETHTOOL_GTXCSUM:
 201         case ETHTOOL_STXCSUM:
 202                 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
 203                        NETIF_F_SCTP_CRC;
 204         case ETHTOOL_GRXCSUM:
 205         case ETHTOOL_SRXCSUM:
 206                 return NETIF_F_RXCSUM;
 207         case ETHTOOL_GSG:
 208         case ETHTOOL_SSG:
 209                 return NETIF_F_SG | NETIF_F_FRAGLIST;
 210         case ETHTOOL_GTSO:
 211         case ETHTOOL_STSO:
 212                 return NETIF_F_ALL_TSO;
 213         case ETHTOOL_GGSO:
 214         case ETHTOOL_SGSO:
 215                 return NETIF_F_GSO;
 216         case ETHTOOL_GGRO:
 217         case ETHTOOL_SGRO:
 218                 return NETIF_F_GRO;
 219         default:
 220                 BUG();
 221         }
 222 }
 223
 224 static int ethtool_get_one_feature(struct net_device *dev,
 225         char __user *useraddr, u32 ethcmd)
 226 {
 227         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 228         struct ethtool_value edata = {
 229                 .cmd = ethcmd,
 230                 .data = !!(dev->features & mask),
 231         };
 232
 233         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 234                 return -EFAULT;
 235         return 0;
 236 }
 237
 238 static int ethtool_set_one_feature(struct net_device *dev,
 239         void __user *useraddr, u32 ethcmd)
 240 {
 241         struct ethtool_value edata;
 242         netdev_features_t mask;
 243
 244         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 245                 return -EFAULT;
 246
 247         mask = ethtool_get_feature_mask(ethcmd);
 248         mask &= dev->hw_features;
 249         if (!mask)
 250                 return -EOPNOTSUPP;
 251
 252         if (edata.data)
 253                 dev->wanted_features |= mask;
 254         else
 255                 dev->wanted_features &= ~mask;
 256
 257         __netdev_update_features(dev);
 258
 259         return 0;
 260 }
 261
 262 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 263                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 264 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 265                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 266                           NETIF_F_RXHASH)
 267
 268 static u32 __ethtool_get_flags(struct net_device *dev)
 269 {
 270         u32 flags = 0;
 271
 272         if (dev->features & NETIF_F_LRO)
 273                 flags |= ETH_FLAG_LRO;
 274         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 275                 flags |= ETH_FLAG_RXVLAN;
 276         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 277                 flags |= ETH_FLAG_TXVLAN;
 278         if (dev->features & NETIF_F_NTUPLE)
 279                 flags |= ETH_FLAG_NTUPLE;
 280         if (dev->features & NETIF_F_RXHASH)
 281                 flags |= ETH_FLAG_RXHASH;
 282
 283         return flags;
 284 }
 285
 286 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 287 {
 288         netdev_features_t features = 0, changed;
 289
 290         if (data & ~ETH_ALL_FLAGS)
 291                 return -EINVAL;
 292
 293         if (data & ETH_FLAG_LRO)
 294                 features |= NETIF_F_LRO;
 295         if (data & ETH_FLAG_RXVLAN)
 296                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 297         if (data & ETH_FLAG_TXVLAN)
 298                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 299         if (data & ETH_FLAG_NTUPLE)
 300                 features |= NETIF_F_NTUPLE;
 301         if (data & ETH_FLAG_RXHASH)
 302                 features |= NETIF_F_RXHASH;
 303
 304         /* allow changing only bits set in hw_features */
 305         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 306         if (changed & ~dev->hw_features)
 307                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 308
 309         dev->wanted_features =
 310                 (dev->wanted_features & ~changed) | (features & changed);
 311
 312         __netdev_update_features(dev);
 313
 314         return 0;
 315 }
 316
 317 /* Given two link masks, AND them together and save the result in dst. */
 318 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 319                                   struct ethtool_link_ksettings *src)
 320 {
 321         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 322         unsigned int idx = 0;
 323
 324         for (; idx < size; idx++) {
 325                 dst->link_modes.supported[idx] &=
 326                         src->link_modes.supported[idx];
 327                 dst->link_modes.advertising[idx] &=
 328                         src->link_modes.advertising[idx];
 329         }
 330 }
 331 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 332
 333 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 334                                              u32 legacy_u32)
 335 {
 336         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 337         dst[0] = legacy_u32;
 338 }
 339 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 340
 341 /* return false if src had higher bits set. lower bits always updated. */
 342 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 343                                              const unsigned long *src)
 344 {
 345         bool retval = true;
 346
 347         /* TODO: following test will soon always be true */
 348         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 349                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 350
 351                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 352                 bitmap_fill(ext, 32);
 353                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 354                 if (bitmap_intersects(ext, src,
 355                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 356                         /* src mask goes beyond bit 31 */
 357                         retval = false;
 358                 }
 359         }
 360         *legacy_u32 = src[0];
 361         return retval;
 362 }
 363 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 364
 365 /* return false if ksettings link modes had higher bits
 366  * set. legacy_settings always updated (best effort)
 367  */
 368 static bool
 369 convert_link_ksettings_to_legacy_settings(
 370         struct ethtool_cmd *legacy_settings,
 371         const struct ethtool_link_ksettings *link_ksettings)
 372 {
 373         bool retval = true;
 374
 375         memset(legacy_settings, 0, sizeof(*legacy_settings));
 376         /* this also clears the deprecated fields in legacy structure:
 377          * __u8         transceiver;
 378          * __u32        maxtxpkt;
 379          * __u32        maxrxpkt;
 380          */
 381
 382         retval &= ethtool_convert_link_mode_to_legacy_u32(
 383                 &legacy_settings->supported,
 384                 link_ksettings->link_modes.supported);
 385         retval &= ethtool_convert_link_mode_to_legacy_u32(
 386                 &legacy_settings->advertising,
 387                 link_ksettings->link_modes.advertising);
 388         retval &= ethtool_convert_link_mode_to_legacy_u32(
 389                 &legacy_settings->lp_advertising,
 390                 link_ksettings->link_modes.lp_advertising);
 391         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 392         legacy_settings->duplex
 393                 = link_ksettings->base.duplex;
 394         legacy_settings->port
 395                 = link_ksettings->base.port;
 396         legacy_settings->phy_address
 397                 = link_ksettings->base.phy_address;
 398         legacy_settings->autoneg
 399                 = link_ksettings->base.autoneg;
 400         legacy_settings->mdio_support
 401                 = link_ksettings->base.mdio_support;
 402         legacy_settings->eth_tp_mdix
 403                 = link_ksettings->base.eth_tp_mdix;
 404         legacy_settings->eth_tp_mdix_ctrl
 405                 = link_ksettings->base.eth_tp_mdix_ctrl;
 406         legacy_settings->transceiver
 407                 = link_ksettings->base.transceiver;
 408         return retval;
 409 }
 410
 411 /* number of 32-bit words to store the user's link mode bitmaps */
 412 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 413         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 414
 415 /* layout of the struct passed from/to userland */
 416 struct ethtool_link_usettings {
 417         struct ethtool_link_settings base;
 418         struct {
 419                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 420                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 421                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 422         } link_modes;
 423 };
 424
 425 /* Internal kernel helper to query a device ethtool_link_settings. */
 426 int __ethtool_get_link_ksettings(struct net_device *dev,
 427                                  struct ethtool_link_ksettings *link_ksettings)
 428 {
 429         ASSERT_RTNL();
 430
 431         if (!dev->ethtool_ops->get_link_ksettings)
 432                 return -EOPNOTSUPP;
 433
 434         memset(link_ksettings, 0, sizeof(*link_ksettings));
 435         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 436 }
 437 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 438
 439 /* convert ethtool_link_usettings in user space to a kernel internal
 440  * ethtool_link_ksettings. return 0 on success, errno on error.
 441  */
 442 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 443                                          const void __user *from)
 444 {
 445         struct ethtool_link_usettings link_usettings;
 446
 447         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 448                 return -EFAULT;
 449
 450         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 451         bitmap_from_arr32(to->link_modes.supported,
 452                           link_usettings.link_modes.supported,
 453                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 454         bitmap_from_arr32(to->link_modes.advertising,
 455                           link_usettings.link_modes.advertising,
 456                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 457         bitmap_from_arr32(to->link_modes.lp_advertising,
 458                           link_usettings.link_modes.lp_advertising,
 459                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 460
 461         return 0;
 462 }
 463
 464 /* Check if the user is trying to change anything besides speed/duplex */
 465 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
 466 {
 467         struct ethtool_link_settings base2 = {};
 468
 469         base2.speed = cmd->base.speed;
 470         base2.port = PORT_OTHER;
 471         base2.duplex = cmd->base.duplex;
 472         base2.cmd = cmd->base.cmd;
 473         base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
 474
 475         return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
 476                 bitmap_empty(cmd->link_modes.supported,
 477                              __ETHTOOL_LINK_MODE_MASK_NBITS) &&
 478                 bitmap_empty(cmd->link_modes.lp_advertising,
 479                              __ETHTOOL_LINK_MODE_MASK_NBITS);
 480 }
 481
 482 /* convert a kernel internal ethtool_link_ksettings to
 483  * ethtool_link_usettings in user space. return 0 on success, errno on
 484  * error.
 485  */
 486 static int
 487 store_link_ksettings_for_user(void __user *to,
 488                               const struct ethtool_link_ksettings *from)
 489 {
 490         struct ethtool_link_usettings link_usettings;
 491
 492         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 493         bitmap_to_arr32(link_usettings.link_modes.supported,
 494                         from->link_modes.supported,
 495                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 496         bitmap_to_arr32(link_usettings.link_modes.advertising,
 497                         from->link_modes.advertising,
 498                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 499         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 500                         from->link_modes.lp_advertising,
 501                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 502
 503         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 504                 return -EFAULT;
 505
 506         return 0;
 507 }
 508
 509 /* Query device for its ethtool_link_settings. */
 510 static int ethtool_get_link_ksettings(struct net_device *dev,
 511                                       void __user *useraddr)
 512 {
 513         int err = 0;
 514         struct ethtool_link_ksettings link_ksettings;
 515
 516         ASSERT_RTNL();
 517         if (!dev->ethtool_ops->get_link_ksettings)
 518                 return -EOPNOTSUPP;
 519
 520         /* handle bitmap nbits handshake */
 521         if (copy_from_user(&link_ksettings.base, useraddr,
 522                            sizeof(link_ksettings.base)))
 523                 return -EFAULT;
 524
 525         if (__ETHTOOL_LINK_MODE_MASK_NU32
 526             != link_ksettings.base.link_mode_masks_nwords) {
 527                 /* wrong link mode nbits requested */
 528                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 529                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 530                 /* send back number of words required as negative val */
 531                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 532                                    "need too many bits for link modes!");
 533                 link_ksettings.base.link_mode_masks_nwords
 534                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 535
 536                 /* copy the base fields back to user, not the link
 537                  * mode bitmaps
 538                  */
 539                 if (copy_to_user(useraddr, &link_ksettings.base,
 540                                  sizeof(link_ksettings.base)))
 541                         return -EFAULT;
 542
 543                 return 0;
 544         }
 545
 546         /* handshake successful: user/kernel agree on
 547          * link_mode_masks_nwords
 548          */
 549
 550         memset(&link_ksettings, 0, sizeof(link_ksettings));
 551         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 552         if (err < 0)
 553                 return err;
 554
 555         /* make sure we tell the right values to user */
 556         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 557         link_ksettings.base.link_mode_masks_nwords
 558                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 559         link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
 560         link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 561
 562         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 563 }
 564
 565 /* Update device ethtool_link_settings. */
 566 static int ethtool_set_link_ksettings(struct net_device *dev,
 567                                       void __user *useraddr)
 568 {
 569         int err;
 570         struct ethtool_link_ksettings link_ksettings;
 571
 572         ASSERT_RTNL();
 573
 574         if (!dev->ethtool_ops->set_link_ksettings)
 575                 return -EOPNOTSUPP;
 576
 577         /* make sure nbits field has expected value */
 578         if (copy_from_user(&link_ksettings.base, useraddr,
 579                            sizeof(link_ksettings.base)))
 580                 return -EFAULT;
 581
 582         if (__ETHTOOL_LINK_MODE_MASK_NU32
 583             != link_ksettings.base.link_mode_masks_nwords)
 584                 return -EINVAL;
 585
 586         /* copy the whole structure, now that we know it has expected
 587          * format
 588          */
 589         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 590         if (err)
 591                 return err;
 592
 593         /* re-check nwords field, just in case */
 594         if (__ETHTOOL_LINK_MODE_MASK_NU32
 595             != link_ksettings.base.link_mode_masks_nwords)
 596                 return -EINVAL;
 597
 598         if (link_ksettings.base.master_slave_cfg ||
 599             link_ksettings.base.master_slave_state)
 600                 return -EINVAL;
 601
 602         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 603         if (err >= 0) {
 604                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 605                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 606         }
 607         return err;
 608 }
 609
 610 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 611                                        const struct ethtool_link_ksettings *cmd,
 612                                        u32 *dev_speed, u8 *dev_duplex)
 613 {
 614         u32 speed;
 615         u8 duplex;
 616
 617         speed = cmd->base.speed;
 618         duplex = cmd->base.duplex;
 619         /* don't allow custom speed and duplex */
 620         if (!ethtool_validate_speed(speed) ||
 621             !ethtool_validate_duplex(duplex) ||
 622             !ethtool_virtdev_validate_cmd(cmd))
 623                 return -EINVAL;
 624         *dev_speed = speed;
 625         *dev_duplex = duplex;
 626
 627         return 0;
 628 }
 629 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 630
 631 /* Query device for its ethtool_cmd settings.
 632  *
 633  * Backward compatibility note: for compatibility with legacy ethtool, this is
 634  * now implemented via get_link_ksettings. When driver reports higher link mode
 635  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 636  * recommend user to upgrade ethtool, but the command is successful (only the
 637  * lower link mode bits reported back to user). Deprecated fields from
 638  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 639  */
 640 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 641 {
 642         struct ethtool_link_ksettings link_ksettings;
 643         struct ethtool_cmd cmd;
 644         int err;
 645
 646         ASSERT_RTNL();
 647         if (!dev->ethtool_ops->get_link_ksettings)
 648                 return -EOPNOTSUPP;
 649
 650         memset(&link_ksettings, 0, sizeof(link_ksettings));
 651         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 652         if (err < 0)
 653                 return err;
 654         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 655
 656         /* send a sensible cmd tag back to user */
 657         cmd.cmd = ETHTOOL_GSET;
 658
 659         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 660                 return -EFAULT;
 661
 662         return 0;
 663 }
 664
 665 /* Update device link settings with given ethtool_cmd.
 666  *
 667  * Backward compatibility note: for compatibility with legacy ethtool, this is
 668  * now always implemented via set_link_settings. When user's request updates
 669  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 670  * warning is logged once (with name of 1st driver/device) to recommend user to
 671  * upgrade ethtool, and the request is rejected.
 672  */
 673 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 674 {
 675         struct ethtool_link_ksettings link_ksettings;
 676         struct ethtool_cmd cmd;
 677         int ret;
 678
 679         ASSERT_RTNL();
 680
 681         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 682                 return -EFAULT;
 683         if (!dev->ethtool_ops->set_link_ksettings)
 684                 return -EOPNOTSUPP;
 685
 686         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 687                 return -EINVAL;
 688         link_ksettings.base.link_mode_masks_nwords =
 689                 __ETHTOOL_LINK_MODE_MASK_NU32;
 690         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 691         if (ret >= 0) {
 692                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 693                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 694         }
 695         return ret;
 696 }
 697
 698 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 699                                                   void __user *useraddr)
 700 {
 701         struct ethtool_drvinfo info;
 702         const struct ethtool_ops *ops = dev->ethtool_ops;
 703
 704         memset(&info, 0, sizeof(info));
 705         info.cmd = ETHTOOL_GDRVINFO;
 706         strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
 707         if (ops->get_drvinfo) {
 708                 ops->get_drvinfo(dev, &info);
 709         } else if (dev->dev.parent && dev->dev.parent->driver) {
 710                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 711                         sizeof(info.bus_info));
 712                 strlcpy(info.driver, dev->dev.parent->driver->name,
 713                         sizeof(info.driver));
 714         } else {
 715                 return -EOPNOTSUPP;
 716         }
 717
 718         /*
 719          * this method of obtaining string set info is deprecated;
 720          * Use ETHTOOL_GSSET_INFO instead.
 721          */
 722         if (ops->get_sset_count) {
 723                 int rc;
 724
 725                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 726                 if (rc >= 0)
 727                         info.testinfo_len = rc;
 728                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 729                 if (rc >= 0)
 730                         info.n_stats = rc;
 731                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 732                 if (rc >= 0)
 733                         info.n_priv_flags = rc;
 734         }
 735         if (ops->get_regs_len) {
 736                 int ret = ops->get_regs_len(dev);
 737
 738                 if (ret > 0)
 739                         info.regdump_len = ret;
 740         }
 741
 742         if (ops->get_eeprom_len)
 743                 info.eedump_len = ops->get_eeprom_len(dev);
 744
 745         if (!info.fw_version[0])
 746                 devlink_compat_running_version(dev, info.fw_version,
 747                                                sizeof(info.fw_version));
 748
 749         if (copy_to_user(useraddr, &info, sizeof(info)))
 750                 return -EFAULT;
 751         return 0;
 752 }
 753
 754 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 755                                                     void __user *useraddr)
 756 {
 757         struct ethtool_sset_info info;
 758         u64 sset_mask;
 759         int i, idx = 0, n_bits = 0, ret, rc;
 760         u32 *info_buf = NULL;
 761
 762         if (copy_from_user(&info, useraddr, sizeof(info)))
 763                 return -EFAULT;
 764
 765         /* store copy of mask, because we zero struct later on */
 766         sset_mask = info.sset_mask;
 767         if (!sset_mask)
 768                 return 0;
 769
 770         /* calculate size of return buffer */
 771         n_bits = hweight64(sset_mask);
 772
 773         memset(&info, 0, sizeof(info));
 774         info.cmd = ETHTOOL_GSSET_INFO;
 775
 776         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 777         if (!info_buf)
 778                 return -ENOMEM;
 779
 780         /*
 781          * fill return buffer based on input bitmask and successful
 782          * get_sset_count return
 783          */
 784         for (i = 0; i < 64; i++) {
 785                 if (!(sset_mask & (1ULL << i)))
 786                         continue;
 787
 788                 rc = __ethtool_get_sset_count(dev, i);
 789                 if (rc >= 0) {
 790                         info.sset_mask |= (1ULL << i);
 791                         info_buf[idx++] = rc;
 792                 }
 793         }
 794
 795         ret = -EFAULT;
 796         if (copy_to_user(useraddr, &info, sizeof(info)))
 797                 goto out;
 798
 799         useraddr += offsetof(struct ethtool_sset_info, data);
 800         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 801                 goto out;
 802
 803         ret = 0;
 804
 805 out:
 806         kfree(info_buf);
 807         return ret;
 808 }
 809
 810 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 811                                                 u32 cmd, void __user *useraddr)
 812 {
 813         struct ethtool_rxnfc info;
 814         size_t info_size = sizeof(info);
 815         int rc;
 816
 817         if (!dev->ethtool_ops->set_rxnfc)
 818                 return -EOPNOTSUPP;
 819
 820         /* struct ethtool_rxnfc was originally defined for
 821          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 822          * members.  User-space might still be using that
 823          * definition. */
 824         if (cmd == ETHTOOL_SRXFH)
 825                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 826                              sizeof(info.data));
 827
 828         if (copy_from_user(&info, useraddr, info_size))
 829                 return -EFAULT;
 830
 831         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 832         if (rc)
 833                 return rc;
 834
 835         if (cmd == ETHTOOL_SRXCLSRLINS &&
 836             copy_to_user(useraddr, &info, info_size))
 837                 return -EFAULT;
 838
 839         return 0;
 840 }
 841
 842 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 843                                                 u32 cmd, void __user *useraddr)
 844 {
 845         struct ethtool_rxnfc info;
 846         size_t info_size = sizeof(info);
 847         const struct ethtool_ops *ops = dev->ethtool_ops;
 848         int ret;
 849         void *rule_buf = NULL;
 850
 851         if (!ops->get_rxnfc)
 852                 return -EOPNOTSUPP;
 853
 854         /* struct ethtool_rxnfc was originally defined for
 855          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 856          * members.  User-space might still be using that
 857          * definition. */
 858         if (cmd == ETHTOOL_GRXFH)
 859                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 860                              sizeof(info.data));
 861
 862         if (copy_from_user(&info, useraddr, info_size))
 863                 return -EFAULT;
 864
 865         /* If FLOW_RSS was requested then user-space must be using the
 866          * new definition, as FLOW_RSS is newer.
 867          */
 868         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
 869                 info_size = sizeof(info);
 870                 if (copy_from_user(&info, useraddr, info_size))
 871                         return -EFAULT;
 872                 /* Since malicious users may modify the original data,
 873                  * we need to check whether FLOW_RSS is still requested.
 874                  */
 875                 if (!(info.flow_type & FLOW_RSS))
 876                         return -EINVAL;
 877         }
 878
 879         if (info.cmd != cmd)
 880                 return -EINVAL;
 881
 882         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 883                 if (info.rule_cnt > 0) {
 884                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
 885                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
 886                                                    GFP_USER);
 887                         if (!rule_buf)
 888                                 return -ENOMEM;
 889                 }
 890         }
 891
 892         ret = ops->get_rxnfc(dev, &info, rule_buf);
 893         if (ret < 0)
 894                 goto err_out;
 895
 896         ret = -EFAULT;
 897         if (copy_to_user(useraddr, &info, info_size))
 898                 goto err_out;
 899
 900         if (rule_buf) {
 901                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 902                 if (copy_to_user(useraddr, rule_buf,
 903                                  info.rule_cnt * sizeof(u32)))
 904                         goto err_out;
 905         }
 906         ret = 0;
 907
 908 err_out:
 909         kfree(rule_buf);
 910
 911         return ret;
 912 }
 913
 914 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
 915                                         struct ethtool_rxnfc *rx_rings,
 916                                         u32 size)
 917 {
 918         int i;
 919
 920         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
 921                 return -EFAULT;
 922
 923         /* Validate ring indices */
 924         for (i = 0; i < size; i++)
 925                 if (indir[i] >= rx_rings->data)
 926                         return -EINVAL;
 927
 928         return 0;
 929 }
 930
 931 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
 932
 933 void netdev_rss_key_fill(void *buffer, size_t len)
 934 {
 935         BUG_ON(len > sizeof(netdev_rss_key));
 936         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
 937         memcpy(buffer, netdev_rss_key, len);
 938 }
 939 EXPORT_SYMBOL(netdev_rss_key_fill);
 940
 941 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
 942                                                      void __user *useraddr)
 943 {
 944         u32 user_size, dev_size;
 945         u32 *indir;
 946         int ret;
 947
 948         if (!dev->ethtool_ops->get_rxfh_indir_size ||
 949             !dev->ethtool_ops->get_rxfh)
 950                 return -EOPNOTSUPP;
 951         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
 952         if (dev_size == 0)
 953                 return -EOPNOTSUPP;
 954
 955         if (copy_from_user(&user_size,
 956                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 957                            sizeof(user_size)))
 958                 return -EFAULT;
 959
 960         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
 961                          &dev_size, sizeof(dev_size)))
 962                 return -EFAULT;
 963
 964         /* If the user buffer size is 0, this is just a query for the
 965          * device table size.  Otherwise, if it's smaller than the
 966          * device table size it's an error.
 967          */
 968         if (user_size < dev_size)
 969                 return user_size == 0 ? 0 : -EINVAL;
 970
 971         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
 972         if (!indir)
 973                 return -ENOMEM;
 974
 975         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
 976         if (ret)
 977                 goto out;
 978
 979         if (copy_to_user(useraddr +
 980                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
 981                          indir, dev_size * sizeof(indir[0])))
 982                 ret = -EFAULT;
 983
 984 out:
 985         kfree(indir);
 986         return ret;
 987 }
 988
 989 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
 990                                                      void __user *useraddr)
 991 {
 992         struct ethtool_rxnfc rx_rings;
 993         u32 user_size, dev_size, i;
 994         u32 *indir;
 995         const struct ethtool_ops *ops = dev->ethtool_ops;
 996         int ret;
 997         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
 998
 999         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1000             !ops->get_rxnfc)
1001                 return -EOPNOTSUPP;
1002
1003         dev_size = ops->get_rxfh_indir_size(dev);
1004         if (dev_size == 0)
1005                 return -EOPNOTSUPP;
1006
1007         if (copy_from_user(&user_size,
1008                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1009                            sizeof(user_size)))
1010                 return -EFAULT;
1011
1012         if (user_size != 0 && user_size != dev_size)
1013                 return -EINVAL;
1014
1015         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1016         if (!indir)
1017                 return -ENOMEM;
1018
1019         rx_rings.cmd = ETHTOOL_GRXRINGS;
1020         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1021         if (ret)
1022                 goto out;
1023
1024         if (user_size == 0) {
1025                 for (i = 0; i < dev_size; i++)
1026                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1027         } else {
1028                 ret = ethtool_copy_validate_indir(indir,
1029                                                   useraddr + ringidx_offset,
1030                                                   &rx_rings,
1031                                                   dev_size);
1032                 if (ret)
1033                         goto out;
1034         }
1035
1036         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1037         if (ret)
1038                 goto out;
1039
1040         /* indicate whether rxfh was set to default */
1041         if (user_size == 0)
1042                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1043         else
1044                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1045
1046 out:
1047         kfree(indir);
1048         return ret;
1049 }
1050
1051 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1052                                                void __user *useraddr)
1053 {
1054         int ret;
1055         const struct ethtool_ops *ops = dev->ethtool_ops;
1056         u32 user_indir_size, user_key_size;
1057         u32 dev_indir_size = 0, dev_key_size = 0;
1058         struct ethtool_rxfh rxfh;
1059         u32 total_size;
1060         u32 indir_bytes;
1061         u32 *indir = NULL;
1062         u8 dev_hfunc = 0;
1063         u8 *hkey = NULL;
1064         u8 *rss_config;
1065
1066         if (!ops->get_rxfh)
1067                 return -EOPNOTSUPP;
1068
1069         if (ops->get_rxfh_indir_size)
1070                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1071         if (ops->get_rxfh_key_size)
1072                 dev_key_size = ops->get_rxfh_key_size(dev);
1073
1074         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1075                 return -EFAULT;
1076         user_indir_size = rxfh.indir_size;
1077         user_key_size = rxfh.key_size;
1078
1079         /* Check that reserved fields are 0 for now */
1080         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1081                 return -EINVAL;
1082         /* Most drivers don't handle rss_context, check it's 0 as well */
1083         if (rxfh.rss_context && !ops->get_rxfh_context)
1084                 return -EOPNOTSUPP;
1085
1086         rxfh.indir_size = dev_indir_size;
1087         rxfh.key_size = dev_key_size;
1088         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1089                 return -EFAULT;
1090
1091         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1092             (user_key_size && (user_key_size != dev_key_size)))
1093                 return -EINVAL;
1094
1095         indir_bytes = user_indir_size * sizeof(indir[0]);
1096         total_size = indir_bytes + user_key_size;
1097         rss_config = kzalloc(total_size, GFP_USER);
1098         if (!rss_config)
1099                 return -ENOMEM;
1100
1101         if (user_indir_size)
1102                 indir = (u32 *)rss_config;
1103
1104         if (user_key_size)
1105                 hkey = rss_config + indir_bytes;
1106
1107         if (rxfh.rss_context)
1108                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1109                                                          &dev_hfunc,
1110                                                          rxfh.rss_context);
1111         else
1112                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1113         if (ret)
1114                 goto out;
1115
1116         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1117                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1118                 ret = -EFAULT;
1119         } else if (copy_to_user(useraddr +
1120                               offsetof(struct ethtool_rxfh, rss_config[0]),
1121                               rss_config, total_size)) {
1122                 ret = -EFAULT;
1123         }
1124 out:
1125         kfree(rss_config);
1126
1127         return ret;
1128 }
1129
1130 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1131                                                void __user *useraddr)
1132 {
1133         int ret;
1134         const struct ethtool_ops *ops = dev->ethtool_ops;
1135         struct ethtool_rxnfc rx_rings;
1136         struct ethtool_rxfh rxfh;
1137         u32 dev_indir_size = 0, dev_key_size = 0, i;
1138         u32 *indir = NULL, indir_bytes = 0;
1139         u8 *hkey = NULL;
1140         u8 *rss_config;
1141         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1142         bool delete = false;
1143
1144         if (!ops->get_rxnfc || !ops->set_rxfh)
1145                 return -EOPNOTSUPP;
1146
1147         if (ops->get_rxfh_indir_size)
1148                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1149         if (ops->get_rxfh_key_size)
1150                 dev_key_size = ops->get_rxfh_key_size(dev);
1151
1152         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1153                 return -EFAULT;
1154
1155         /* Check that reserved fields are 0 for now */
1156         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1157                 return -EINVAL;
1158         /* Most drivers don't handle rss_context, check it's 0 as well */
1159         if (rxfh.rss_context && !ops->set_rxfh_context)
1160                 return -EOPNOTSUPP;
1161
1162         /* If either indir, hash key or function is valid, proceed further.
1163          * Must request at least one change: indir size, hash key or function.
1164          */
1165         if ((rxfh.indir_size &&
1166              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1167              rxfh.indir_size != dev_indir_size) ||
1168             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1169             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1170              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1171                 return -EINVAL;
1172
1173         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1174                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1175
1176         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1177         if (!rss_config)
1178                 return -ENOMEM;
1179
1180         rx_rings.cmd = ETHTOOL_GRXRINGS;
1181         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1182         if (ret)
1183                 goto out;
1184
1185         /* rxfh.indir_size == 0 means reset the indir table to default (master
1186          * context) or delete the context (other RSS contexts).
1187          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1188          */
1189         if (rxfh.indir_size &&
1190             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1191                 indir = (u32 *)rss_config;
1192                 ret = ethtool_copy_validate_indir(indir,
1193                                                   useraddr + rss_cfg_offset,
1194                                                   &rx_rings,
1195                                                   rxfh.indir_size);
1196                 if (ret)
1197                         goto out;
1198         } else if (rxfh.indir_size == 0) {
1199                 if (rxfh.rss_context == 0) {
1200                         indir = (u32 *)rss_config;
1201                         for (i = 0; i < dev_indir_size; i++)
1202                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1203                 } else {
1204                         delete = true;
1205                 }
1206         }
1207
1208         if (rxfh.key_size) {
1209                 hkey = rss_config + indir_bytes;
1210                 if (copy_from_user(hkey,
1211                                    useraddr + rss_cfg_offset + indir_bytes,
1212                                    rxfh.key_size)) {
1213                         ret = -EFAULT;
1214                         goto out;
1215                 }
1216         }
1217
1218         if (rxfh.rss_context)
1219                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1220                                             &rxfh.rss_context, delete);
1221         else
1222                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1223         if (ret)
1224                 goto out;
1225
1226         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1227                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1228                 ret = -EFAULT;
1229
1230         if (!rxfh.rss_context) {
1231                 /* indicate whether rxfh was set to default */
1232                 if (rxfh.indir_size == 0)
1233                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1234                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1235                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1236         }
1237
1238 out:
1239         kfree(rss_config);
1240         return ret;
1241 }
1242
1243 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1244 {
1245         struct ethtool_regs regs;
1246         const struct ethtool_ops *ops = dev->ethtool_ops;
1247         void *regbuf;
1248         int reglen, ret;
1249
1250         if (!ops->get_regs || !ops->get_regs_len)
1251                 return -EOPNOTSUPP;
1252
1253         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1254                 return -EFAULT;
1255
1256         reglen = ops->get_regs_len(dev);
1257         if (reglen <= 0)
1258                 return reglen;
1259
1260         if (regs.len > reglen)
1261                 regs.len = reglen;
1262
1263         regbuf = vzalloc(reglen);
1264         if (!regbuf)
1265                 return -ENOMEM;
1266
1267         if (regs.len < reglen)
1268                 reglen = regs.len;
1269
1270         ops->get_regs(dev, &regs, regbuf);
1271
1272         ret = -EFAULT;
1273         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1274                 goto out;
1275         useraddr += offsetof(struct ethtool_regs, data);
1276         if (copy_to_user(useraddr, regbuf, reglen))
1277                 goto out;
1278         ret = 0;
1279
1280  out:
1281         vfree(regbuf);
1282         return ret;
1283 }
1284
1285 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1286 {
1287         struct ethtool_value reset;
1288         int ret;
1289
1290         if (!dev->ethtool_ops->reset)
1291                 return -EOPNOTSUPP;
1292
1293         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1294                 return -EFAULT;
1295
1296         ret = dev->ethtool_ops->reset(dev, &reset.data);
1297         if (ret)
1298                 return ret;
1299
1300         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1301                 return -EFAULT;
1302         return 0;
1303 }
1304
1305 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1306 {
1307         struct ethtool_wolinfo wol;
1308
1309         if (!dev->ethtool_ops->get_wol)
1310                 return -EOPNOTSUPP;
1311
1312         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1313         wol.cmd = ETHTOOL_GWOL;
1314         dev->ethtool_ops->get_wol(dev, &wol);
1315
1316         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1317                 return -EFAULT;
1318         return 0;
1319 }
1320
1321 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1322 {
1323         struct ethtool_wolinfo wol;
1324         int ret;
1325
1326         if (!dev->ethtool_ops->set_wol)
1327                 return -EOPNOTSUPP;
1328
1329         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1330                 return -EFAULT;
1331
1332         ret = dev->ethtool_ops->set_wol(dev, &wol);
1333         if (ret)
1334                 return ret;
1335
1336         dev->wol_enabled = !!wol.wolopts;
1337         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1338
1339         return 0;
1340 }
1341
1342 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1343 {
1344         struct ethtool_eee edata;
1345         int rc;
1346
1347         if (!dev->ethtool_ops->get_eee)
1348                 return -EOPNOTSUPP;
1349
1350         memset(&edata, 0, sizeof(struct ethtool_eee));
1351         edata.cmd = ETHTOOL_GEEE;
1352         rc = dev->ethtool_ops->get_eee(dev, &edata);
1353
1354         if (rc)
1355                 return rc;
1356
1357         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1358                 return -EFAULT;
1359
1360         return 0;
1361 }
1362
1363 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1364 {
1365         struct ethtool_eee edata;
1366         int ret;
1367
1368         if (!dev->ethtool_ops->set_eee)
1369                 return -EOPNOTSUPP;
1370
1371         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1372                 return -EFAULT;
1373
1374         ret = dev->ethtool_ops->set_eee(dev, &edata);
1375         if (!ret)
1376                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1377         return ret;
1378 }
1379
1380 static int ethtool_nway_reset(struct net_device *dev)
1381 {
1382         if (!dev->ethtool_ops->nway_reset)
1383                 return -EOPNOTSUPP;
1384
1385         return dev->ethtool_ops->nway_reset(dev);
1386 }
1387
1388 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1389 {
1390         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1391         int link = __ethtool_get_link(dev);
1392
1393         if (link < 0)
1394                 return link;
1395
1396         edata.data = link;
1397         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1398                 return -EFAULT;
1399         return 0;
1400 }
1401
1402 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1403                                   int (*getter)(struct net_device *,
1404                                                 struct ethtool_eeprom *, u8 *),
1405                                   u32 total_len)
1406 {
1407         struct ethtool_eeprom eeprom;
1408         void __user *userbuf = useraddr + sizeof(eeprom);
1409         u32 bytes_remaining;
1410         u8 *data;
1411         int ret = 0;
1412
1413         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1414                 return -EFAULT;
1415
1416         /* Check for wrap and zero */
1417         if (eeprom.offset + eeprom.len <= eeprom.offset)
1418                 return -EINVAL;
1419
1420         /* Check for exceeding total eeprom len */
1421         if (eeprom.offset + eeprom.len > total_len)
1422                 return -EINVAL;
1423
1424         data = kmalloc(PAGE_SIZE, GFP_USER);
1425         if (!data)
1426                 return -ENOMEM;
1427
1428         bytes_remaining = eeprom.len;
1429         while (bytes_remaining > 0) {
1430                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1431
1432                 ret = getter(dev, &eeprom, data);
1433                 if (ret)
1434                         break;
1435                 if (copy_to_user(userbuf, data, eeprom.len)) {
1436                         ret = -EFAULT;
1437                         break;
1438                 }
1439                 userbuf += eeprom.len;
1440                 eeprom.offset += eeprom.len;
1441                 bytes_remaining -= eeprom.len;
1442         }
1443
1444         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1445         eeprom.offset -= eeprom.len;
1446         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1447                 ret = -EFAULT;
1448
1449         kfree(data);
1450         return ret;
1451 }
1452
1453 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1454 {
1455         const struct ethtool_ops *ops = dev->ethtool_ops;
1456
1457         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1458             !ops->get_eeprom_len(dev))
1459                 return -EOPNOTSUPP;
1460
1461         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1462                                       ops->get_eeprom_len(dev));
1463 }
1464
1465 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1466 {
1467         struct ethtool_eeprom eeprom;
1468         const struct ethtool_ops *ops = dev->ethtool_ops;
1469         void __user *userbuf = useraddr + sizeof(eeprom);
1470         u32 bytes_remaining;
1471         u8 *data;
1472         int ret = 0;
1473
1474         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1475             !ops->get_eeprom_len(dev))
1476                 return -EOPNOTSUPP;
1477
1478         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1479                 return -EFAULT;
1480
1481         /* Check for wrap and zero */
1482         if (eeprom.offset + eeprom.len <= eeprom.offset)
1483                 return -EINVAL;
1484
1485         /* Check for exceeding total eeprom len */
1486         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1487                 return -EINVAL;
1488
1489         data = kmalloc(PAGE_SIZE, GFP_USER);
1490         if (!data)
1491                 return -ENOMEM;
1492
1493         bytes_remaining = eeprom.len;
1494         while (bytes_remaining > 0) {
1495                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1496
1497                 if (copy_from_user(data, userbuf, eeprom.len)) {
1498                         ret = -EFAULT;
1499                         break;
1500                 }
1501                 ret = ops->set_eeprom(dev, &eeprom, data);
1502                 if (ret)
1503                         break;
1504                 userbuf += eeprom.len;
1505                 eeprom.offset += eeprom.len;
1506                 bytes_remaining -= eeprom.len;
1507         }
1508
1509         kfree(data);
1510         return ret;
1511 }
1512
1513 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1514                                                    void __user *useraddr)
1515 {
1516         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1517         int ret;
1518
1519         if (!dev->ethtool_ops->get_coalesce)
1520                 return -EOPNOTSUPP;
1521
1522         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce);
1523         if (ret)
1524                 return ret;
1525
1526         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1527                 return -EFAULT;
1528         return 0;
1529 }
1530
1531 static bool
1532 ethtool_set_coalesce_supported(struct net_device *dev,
1533                                struct ethtool_coalesce *coalesce)
1534 {
1535         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1536         u32 nonzero_params = 0;
1537
1538         if (coalesce->rx_coalesce_usecs)
1539                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1540         if (coalesce->rx_max_coalesced_frames)
1541                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1542         if (coalesce->rx_coalesce_usecs_irq)
1543                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1544         if (coalesce->rx_max_coalesced_frames_irq)
1545                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1546         if (coalesce->tx_coalesce_usecs)
1547                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1548         if (coalesce->tx_max_coalesced_frames)
1549                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1550         if (coalesce->tx_coalesce_usecs_irq)
1551                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1552         if (coalesce->tx_max_coalesced_frames_irq)
1553                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1554         if (coalesce->stats_block_coalesce_usecs)
1555                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1556         if (coalesce->use_adaptive_rx_coalesce)
1557                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1558         if (coalesce->use_adaptive_tx_coalesce)
1559                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1560         if (coalesce->pkt_rate_low)
1561                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1562         if (coalesce->rx_coalesce_usecs_low)
1563                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1564         if (coalesce->rx_max_coalesced_frames_low)
1565                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1566         if (coalesce->tx_coalesce_usecs_low)
1567                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1568         if (coalesce->tx_max_coalesced_frames_low)
1569                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1570         if (coalesce->pkt_rate_high)
1571                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1572         if (coalesce->rx_coalesce_usecs_high)
1573                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1574         if (coalesce->rx_max_coalesced_frames_high)
1575                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1576         if (coalesce->tx_coalesce_usecs_high)
1577                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1578         if (coalesce->tx_max_coalesced_frames_high)
1579                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1580         if (coalesce->rate_sample_interval)
1581                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1582
1583         return (supported_params & nonzero_params) == nonzero_params;
1584 }
1585
1586 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1587                                                    void __user *useraddr)
1588 {
1589         struct ethtool_coalesce coalesce;
1590         int ret;
1591
1592         if (!dev->ethtool_ops->set_coalesce)
1593                 return -EOPNOTSUPP;
1594
1595         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1596                 return -EFAULT;
1597
1598         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1599                 return -EOPNOTSUPP;
1600
1601         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce);
1602         if (!ret)
1603                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1604         return ret;
1605 }
1606
1607 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1608 {
1609         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1610
1611         if (!dev->ethtool_ops->get_ringparam)
1612                 return -EOPNOTSUPP;
1613
1614         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1615
1616         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1617                 return -EFAULT;
1618         return 0;
1619 }
1620
1621 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1622 {
1623         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1624         int ret;
1625
1626         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1627                 return -EOPNOTSUPP;
1628
1629         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1630                 return -EFAULT;
1631
1632         dev->ethtool_ops->get_ringparam(dev, &max);
1633
1634         /* ensure new ring parameters are within the maximums */
1635         if (ringparam.rx_pending > max.rx_max_pending ||
1636             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1637             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1638             ringparam.tx_pending > max.tx_max_pending)
1639                 return -EINVAL;
1640
1641         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
1642         if (!ret)
1643                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1644         return ret;
1645 }
1646
1647 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1648                                                    void __user *useraddr)
1649 {
1650         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1651
1652         if (!dev->ethtool_ops->get_channels)
1653                 return -EOPNOTSUPP;
1654
1655         dev->ethtool_ops->get_channels(dev, &channels);
1656
1657         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1658                 return -EFAULT;
1659         return 0;
1660 }
1661
1662 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1663                                                    void __user *useraddr)
1664 {
1665         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1666         u16 from_channel, to_channel;
1667         u32 max_rx_in_use = 0;
1668         unsigned int i;
1669         int ret;
1670
1671         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1672                 return -EOPNOTSUPP;
1673
1674         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1675                 return -EFAULT;
1676
1677         dev->ethtool_ops->get_channels(dev, &curr);
1678
1679         if (channels.rx_count == curr.rx_count &&
1680             channels.tx_count == curr.tx_count &&
1681             channels.combined_count == curr.combined_count &&
1682             channels.other_count == curr.other_count)
1683                 return 0;
1684
1685         /* ensure new counts are within the maximums */
1686         if (channels.rx_count > curr.max_rx ||
1687             channels.tx_count > curr.max_tx ||
1688             channels.combined_count > curr.max_combined ||
1689             channels.other_count > curr.max_other)
1690                 return -EINVAL;
1691
1692         /* ensure there is at least one RX and one TX channel */
1693         if (!channels.combined_count &&
1694             (!channels.rx_count || !channels.tx_count))
1695                 return -EINVAL;
1696
1697         /* ensure the new Rx count fits within the configured Rx flow
1698          * indirection table settings */
1699         if (netif_is_rxfh_configured(dev) &&
1700             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1701             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1702             return -EINVAL;
1703
1704         /* Disabling channels, query zero-copy AF_XDP sockets */
1705         from_channel = channels.combined_count +
1706                 min(channels.rx_count, channels.tx_count);
1707         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1708         for (i = from_channel; i < to_channel; i++)
1709                 if (xdp_get_umem_from_qid(dev, i))
1710                         return -EINVAL;
1711
1712         ret = dev->ethtool_ops->set_channels(dev, &channels);
1713         if (!ret)
1714                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1715         return ret;
1716 }
1717
1718 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1719 {
1720         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1721
1722         if (!dev->ethtool_ops->get_pauseparam)
1723                 return -EOPNOTSUPP;
1724
1725         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1726
1727         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1728                 return -EFAULT;
1729         return 0;
1730 }
1731
1732 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1733 {
1734         struct ethtool_pauseparam pauseparam;
1735         int ret;
1736
1737         if (!dev->ethtool_ops->set_pauseparam)
1738                 return -EOPNOTSUPP;
1739
1740         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1741                 return -EFAULT;
1742
1743         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1744         if (!ret)
1745                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1746         return ret;
1747 }
1748
1749 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1750 {
1751         struct ethtool_test test;
1752         const struct ethtool_ops *ops = dev->ethtool_ops;
1753         u64 *data;
1754         int ret, test_len;
1755
1756         if (!ops->self_test || !ops->get_sset_count)
1757                 return -EOPNOTSUPP;
1758
1759         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1760         if (test_len < 0)
1761                 return test_len;
1762         WARN_ON(test_len == 0);
1763
1764         if (copy_from_user(&test, useraddr, sizeof(test)))
1765                 return -EFAULT;
1766
1767         test.len = test_len;
1768         data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1769         if (!data)
1770                 return -ENOMEM;
1771
1772         netif_testing_on(dev);
1773         ops->self_test(dev, &test, data);
1774         netif_testing_off(dev);
1775
1776         ret = -EFAULT;
1777         if (copy_to_user(useraddr, &test, sizeof(test)))
1778                 goto out;
1779         useraddr += sizeof(test);
1780         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1781                 goto out;
1782         ret = 0;
1783
1784  out:
1785         kfree(data);
1786         return ret;
1787 }
1788
1789 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1790 {
1791         struct ethtool_gstrings gstrings;
1792         u8 *data;
1793         int ret;
1794
1795         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1796                 return -EFAULT;
1797
1798         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1799         if (ret < 0)
1800                 return ret;
1801         if (ret > S32_MAX / ETH_GSTRING_LEN)
1802                 return -ENOMEM;
1803         WARN_ON_ONCE(!ret);
1804
1805         gstrings.len = ret;
1806
1807         if (gstrings.len) {
1808                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1809                 if (!data)
1810                         return -ENOMEM;
1811
1812                 __ethtool_get_strings(dev, gstrings.string_set, data);
1813         } else {
1814                 data = NULL;
1815         }
1816
1817         ret = -EFAULT;
1818         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1819                 goto out;
1820         useraddr += sizeof(gstrings);
1821         if (gstrings.len &&
1822             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1823                 goto out;
1824         ret = 0;
1825
1826 out:
1827         vfree(data);
1828         return ret;
1829 }
1830
1831 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1832 {
1833         struct ethtool_value id;
1834         static bool busy;
1835         const struct ethtool_ops *ops = dev->ethtool_ops;
1836         int rc;
1837
1838         if (!ops->set_phys_id)
1839                 return -EOPNOTSUPP;
1840
1841         if (busy)
1842                 return -EBUSY;
1843
1844         if (copy_from_user(&id, useraddr, sizeof(id)))
1845                 return -EFAULT;
1846
1847         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1848         if (rc < 0)
1849                 return rc;
1850
1851         /* Drop the RTNL lock while waiting, but prevent reentry or
1852          * removal of the device.
1853          */
1854         busy = true;
1855         dev_hold(dev);
1856         rtnl_unlock();
1857
1858         if (rc == 0) {
1859                 /* Driver will handle this itself */
1860                 schedule_timeout_interruptible(
1861                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1862         } else {
1863                 /* Driver expects to be called at twice the frequency in rc */
1864                 int n = rc * 2, i, interval = HZ / n;
1865
1866                 /* Count down seconds */
1867                 do {
1868                         /* Count down iterations per second */
1869                         i = n;
1870                         do {
1871                                 rtnl_lock();
1872                                 rc = ops->set_phys_id(dev,
1873                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1874                                 rtnl_unlock();
1875                                 if (rc)
1876                                         break;
1877                                 schedule_timeout_interruptible(interval);
1878                         } while (!signal_pending(current) && --i != 0);
1879                 } while (!signal_pending(current) &&
1880                          (id.data == 0 || --id.data != 0));
1881         }
1882
1883         rtnl_lock();
1884         dev_put(dev);
1885         busy = false;
1886
1887         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1888         return rc;
1889 }
1890
1891 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1892 {
1893         struct ethtool_stats stats;
1894         const struct ethtool_ops *ops = dev->ethtool_ops;
1895         u64 *data;
1896         int ret, n_stats;
1897
1898         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1899                 return -EOPNOTSUPP;
1900
1901         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1902         if (n_stats < 0)
1903                 return n_stats;
1904         if (n_stats > S32_MAX / sizeof(u64))
1905                 return -ENOMEM;
1906         WARN_ON_ONCE(!n_stats);
1907         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1908                 return -EFAULT;
1909
1910         stats.n_stats = n_stats;
1911
1912         if (n_stats) {
1913                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1914                 if (!data)
1915                         return -ENOMEM;
1916                 ops->get_ethtool_stats(dev, &stats, data);
1917         } else {
1918                 data = NULL;
1919         }
1920
1921         ret = -EFAULT;
1922         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1923                 goto out;
1924         useraddr += sizeof(stats);
1925         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
1926                 goto out;
1927         ret = 0;
1928
1929  out:
1930         vfree(data);
1931         return ret;
1932 }
1933
1934 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1935 {
1936         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
1937         const struct ethtool_ops *ops = dev->ethtool_ops;
1938         struct phy_device *phydev = dev->phydev;
1939         struct ethtool_stats stats;
1940         u64 *data;
1941         int ret, n_stats;
1942
1943         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1944                 return -EOPNOTSUPP;
1945
1946         if (dev->phydev && !ops->get_ethtool_phy_stats &&
1947             phy_ops && phy_ops->get_sset_count)
1948                 n_stats = phy_ops->get_sset_count(dev->phydev);
1949         else
1950                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1951         if (n_stats < 0)
1952                 return n_stats;
1953         if (n_stats > S32_MAX / sizeof(u64))
1954                 return -ENOMEM;
1955         WARN_ON_ONCE(!n_stats);
1956
1957         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1958                 return -EFAULT;
1959
1960         stats.n_stats = n_stats;
1961
1962         if (n_stats) {
1963                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1964                 if (!data)
1965                         return -ENOMEM;
1966
1967                 if (dev->phydev && !ops->get_ethtool_phy_stats &&
1968                     phy_ops && phy_ops->get_stats) {
1969                         ret = phy_ops->get_stats(dev->phydev, &stats, data);
1970                         if (ret < 0)
1971                                 goto out;
1972                 } else {
1973                         ops->get_ethtool_phy_stats(dev, &stats, data);
1974                 }
1975         } else {
1976                 data = NULL;
1977         }
1978
1979         ret = -EFAULT;
1980         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1981                 goto out;
1982         useraddr += sizeof(stats);
1983         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
1984                 goto out;
1985         ret = 0;
1986
1987  out:
1988         vfree(data);
1989         return ret;
1990 }
1991
1992 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1993 {
1994         struct ethtool_perm_addr epaddr;
1995
1996         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1997                 return -EFAULT;
1998
1999         if (epaddr.size < dev->addr_len)
2000                 return -ETOOSMALL;
2001         epaddr.size = dev->addr_len;
2002
2003         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2004                 return -EFAULT;
2005         useraddr += sizeof(epaddr);
2006         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2007                 return -EFAULT;
2008         return 0;
2009 }
2010
2011 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2012                              u32 cmd, u32 (*actor)(struct net_device *))
2013 {
2014         struct ethtool_value edata = { .cmd = cmd };
2015
2016         if (!actor)
2017                 return -EOPNOTSUPP;
2018
2019         edata.data = actor(dev);
2020
2021         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2022                 return -EFAULT;
2023         return 0;
2024 }
2025
2026 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2027                              void (*actor)(struct net_device *, u32))
2028 {
2029         struct ethtool_value edata;
2030
2031         if (!actor)
2032                 return -EOPNOTSUPP;
2033
2034         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2035                 return -EFAULT;
2036
2037         actor(dev, edata.data);
2038         return 0;
2039 }
2040
2041 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2042                              int (*actor)(struct net_device *, u32))
2043 {
2044         struct ethtool_value edata;
2045
2046         if (!actor)
2047                 return -EOPNOTSUPP;
2048
2049         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2050                 return -EFAULT;
2051
2052         return actor(dev, edata.data);
2053 }
2054
2055 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2056                                                    char __user *useraddr)
2057 {
2058         struct ethtool_flash efl;
2059
2060         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2061                 return -EFAULT;
2062         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2063
2064         if (!dev->ethtool_ops->flash_device)
2065                 return devlink_compat_flash_update(dev, efl.data);
2066
2067         return dev->ethtool_ops->flash_device(dev, &efl);
2068 }
2069
2070 static int ethtool_set_dump(struct net_device *dev,
2071                         void __user *useraddr)
2072 {
2073         struct ethtool_dump dump;
2074
2075         if (!dev->ethtool_ops->set_dump)
2076                 return -EOPNOTSUPP;
2077
2078         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2079                 return -EFAULT;
2080
2081         return dev->ethtool_ops->set_dump(dev, &dump);
2082 }
2083
2084 static int ethtool_get_dump_flag(struct net_device *dev,
2085                                 void __user *useraddr)
2086 {
2087         int ret;
2088         struct ethtool_dump dump;
2089         const struct ethtool_ops *ops = dev->ethtool_ops;
2090
2091         if (!ops->get_dump_flag)
2092                 return -EOPNOTSUPP;
2093
2094         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2095                 return -EFAULT;
2096
2097         ret = ops->get_dump_flag(dev, &dump);
2098         if (ret)
2099                 return ret;
2100
2101         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2102                 return -EFAULT;
2103         return 0;
2104 }
2105
2106 static int ethtool_get_dump_data(struct net_device *dev,
2107                                 void __user *useraddr)
2108 {
2109         int ret;
2110         __u32 len;
2111         struct ethtool_dump dump, tmp;
2112         const struct ethtool_ops *ops = dev->ethtool_ops;
2113         void *data = NULL;
2114
2115         if (!ops->get_dump_data || !ops->get_dump_flag)
2116                 return -EOPNOTSUPP;
2117
2118         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2119                 return -EFAULT;
2120
2121         memset(&tmp, 0, sizeof(tmp));
2122         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2123         ret = ops->get_dump_flag(dev, &tmp);
2124         if (ret)
2125                 return ret;
2126
2127         len = min(tmp.len, dump.len);
2128         if (!len)
2129                 return -EFAULT;
2130
2131         /* Don't ever let the driver think there's more space available
2132          * than it requested with .get_dump_flag().
2133          */
2134         dump.len = len;
2135
2136         /* Always allocate enough space to hold the whole thing so that the
2137          * driver does not need to check the length and bother with partial
2138          * dumping.
2139          */
2140         data = vzalloc(tmp.len);
2141         if (!data)
2142                 return -ENOMEM;
2143         ret = ops->get_dump_data(dev, &dump, data);
2144         if (ret)
2145                 goto out;
2146
2147         /* There are two sane possibilities:
2148          * 1. The driver's .get_dump_data() does not touch dump.len.
2149          * 2. Or it may set dump.len to how much it really writes, which
2150          *    should be tmp.len (or len if it can do a partial dump).
2151          * In any case respond to userspace with the actual length of data
2152          * it's receiving.
2153          */
2154         WARN_ON(dump.len != len && dump.len != tmp.len);
2155         dump.len = len;
2156
2157         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2158                 ret = -EFAULT;
2159                 goto out;
2160         }
2161         useraddr += offsetof(struct ethtool_dump, data);
2162         if (copy_to_user(useraddr, data, len))
2163                 ret = -EFAULT;
2164 out:
2165         vfree(data);
2166         return ret;
2167 }
2168
2169 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2170 {
2171         struct ethtool_ts_info info;
2172         int err;
2173
2174         err = __ethtool_get_ts_info(dev, &info);
2175         if (err)
2176                 return err;
2177
2178         if (copy_to_user(useraddr, &info, sizeof(info)))
2179                 return -EFAULT;
2180
2181         return 0;
2182 }
2183
2184 static int __ethtool_get_module_info(struct net_device *dev,
2185                                      struct ethtool_modinfo *modinfo)
2186 {
2187         const struct ethtool_ops *ops = dev->ethtool_ops;
2188         struct phy_device *phydev = dev->phydev;
2189
2190         if (dev->sfp_bus)
2191                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2192
2193         if (phydev && phydev->drv && phydev->drv->module_info)
2194                 return phydev->drv->module_info(phydev, modinfo);
2195
2196         if (ops->get_module_info)
2197                 return ops->get_module_info(dev, modinfo);
2198
2199         return -EOPNOTSUPP;
2200 }
2201
2202 static int ethtool_get_module_info(struct net_device *dev,
2203                                    void __user *useraddr)
2204 {
2205         int ret;
2206         struct ethtool_modinfo modinfo;
2207
2208         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2209                 return -EFAULT;
2210
2211         ret = __ethtool_get_module_info(dev, &modinfo);
2212         if (ret)
2213                 return ret;
2214
2215         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2216                 return -EFAULT;
2217
2218         return 0;
2219 }
2220
2221 static int __ethtool_get_module_eeprom(struct net_device *dev,
2222                                        struct ethtool_eeprom *ee, u8 *data)
2223 {
2224         const struct ethtool_ops *ops = dev->ethtool_ops;
2225         struct phy_device *phydev = dev->phydev;
2226
2227         if (dev->sfp_bus)
2228                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2229
2230         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2231                 return phydev->drv->module_eeprom(phydev, ee, data);
2232
2233         if (ops->get_module_eeprom)
2234                 return ops->get_module_eeprom(dev, ee, data);
2235
2236         return -EOPNOTSUPP;
2237 }
2238
2239 static int ethtool_get_module_eeprom(struct net_device *dev,
2240                                      void __user *useraddr)
2241 {
2242         int ret;
2243         struct ethtool_modinfo modinfo;
2244
2245         ret = __ethtool_get_module_info(dev, &modinfo);
2246         if (ret)
2247                 return ret;
2248
2249         return ethtool_get_any_eeprom(dev, useraddr,
2250                                       __ethtool_get_module_eeprom,
2251                                       modinfo.eeprom_len);
2252 }
2253
2254 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2255 {
2256         switch (tuna->id) {
2257         case ETHTOOL_RX_COPYBREAK:
2258         case ETHTOOL_TX_COPYBREAK:
2259                 if (tuna->len != sizeof(u32) ||
2260                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2261                         return -EINVAL;
2262                 break;
2263         case ETHTOOL_PFC_PREVENTION_TOUT:
2264                 if (tuna->len != sizeof(u16) ||
2265                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2266                         return -EINVAL;
2267                 break;
2268         default:
2269                 return -EINVAL;
2270         }
2271
2272         return 0;
2273 }
2274
2275 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2276 {
2277         int ret;
2278         struct ethtool_tunable tuna;
2279         const struct ethtool_ops *ops = dev->ethtool_ops;
2280         void *data;
2281
2282         if (!ops->get_tunable)
2283                 return -EOPNOTSUPP;
2284         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2285                 return -EFAULT;
2286         ret = ethtool_tunable_valid(&tuna);
2287         if (ret)
2288                 return ret;
2289         data = kmalloc(tuna.len, GFP_USER);
2290         if (!data)
2291                 return -ENOMEM;
2292         ret = ops->get_tunable(dev, &tuna, data);
2293         if (ret)
2294                 goto out;
2295         useraddr += sizeof(tuna);
2296         ret = -EFAULT;
2297         if (copy_to_user(useraddr, data, tuna.len))
2298                 goto out;
2299         ret = 0;
2300
2301 out:
2302         kfree(data);
2303         return ret;
2304 }
2305
2306 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2307 {
2308         int ret;
2309         struct ethtool_tunable tuna;
2310         const struct ethtool_ops *ops = dev->ethtool_ops;
2311         void *data;
2312
2313         if (!ops->set_tunable)
2314                 return -EOPNOTSUPP;
2315         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2316                 return -EFAULT;
2317         ret = ethtool_tunable_valid(&tuna);
2318         if (ret)
2319                 return ret;
2320         useraddr += sizeof(tuna);
2321         data = memdup_user(useraddr, tuna.len);
2322         if (IS_ERR(data))
2323                 return PTR_ERR(data);
2324         ret = ops->set_tunable(dev, &tuna, data);
2325
2326         kfree(data);
2327         return ret;
2328 }
2329
2330 static noinline_for_stack int
2331 ethtool_get_per_queue_coalesce(struct net_device *dev,
2332                                void __user *useraddr,
2333                                struct ethtool_per_queue_op *per_queue_opt)
2334 {
2335         u32 bit;
2336         int ret;
2337         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2338
2339         if (!dev->ethtool_ops->get_per_queue_coalesce)
2340                 return -EOPNOTSUPP;
2341
2342         useraddr += sizeof(*per_queue_opt);
2343
2344         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2345                           MAX_NUM_QUEUE);
2346
2347         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2348                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2349
2350                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2351                 if (ret != 0)
2352                         return ret;
2353                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2354                         return -EFAULT;
2355                 useraddr += sizeof(coalesce);
2356         }
2357
2358         return 0;
2359 }
2360
2361 static noinline_for_stack int
2362 ethtool_set_per_queue_coalesce(struct net_device *dev,
2363                                void __user *useraddr,
2364                                struct ethtool_per_queue_op *per_queue_opt)
2365 {
2366         u32 bit;
2367         int i, ret = 0;
2368         int n_queue;
2369         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2370         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2371
2372         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2373             (!dev->ethtool_ops->get_per_queue_coalesce))
2374                 return -EOPNOTSUPP;
2375
2376         useraddr += sizeof(*per_queue_opt);
2377
2378         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2379         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2380         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2381         if (!backup)
2382                 return -ENOMEM;
2383
2384         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2385                 struct ethtool_coalesce coalesce;
2386
2387                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2388                 if (ret != 0)
2389                         goto roll_back;
2390
2391                 tmp++;
2392
2393                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2394                         ret = -EFAULT;
2395                         goto roll_back;
2396                 }
2397
2398                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2399                         ret = -EOPNOTSUPP;
2400                         goto roll_back;
2401                 }
2402
2403                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2404                 if (ret != 0)
2405                         goto roll_back;
2406
2407                 useraddr += sizeof(coalesce);
2408         }
2409
2410 roll_back:
2411         if (ret != 0) {
2412                 tmp = backup;
2413                 for_each_set_bit(i, queue_mask, bit) {
2414                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2415                         tmp++;
2416                 }
2417         }
2418         kfree(backup);
2419
2420         return ret;
2421 }
2422
2423 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2424                                  void __user *useraddr, u32 sub_cmd)
2425 {
2426         struct ethtool_per_queue_op per_queue_opt;
2427
2428         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2429                 return -EFAULT;
2430
2431         if (per_queue_opt.sub_command != sub_cmd)
2432                 return -EINVAL;
2433
2434         switch (per_queue_opt.sub_command) {
2435         case ETHTOOL_GCOALESCE:
2436                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2437         case ETHTOOL_SCOALESCE:
2438                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2439         default:
2440                 return -EOPNOTSUPP;
2441         };
2442 }
2443
2444 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2445 {
2446         switch (tuna->id) {
2447         case ETHTOOL_PHY_DOWNSHIFT:
2448         case ETHTOOL_PHY_FAST_LINK_DOWN:
2449                 if (tuna->len != sizeof(u8) ||
2450                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2451                         return -EINVAL;
2452                 break;
2453         case ETHTOOL_PHY_EDPD:
2454                 if (tuna->len != sizeof(u16) ||
2455                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2456                         return -EINVAL;
2457                 break;
2458         default:
2459                 return -EINVAL;
2460         }
2461
2462         return 0;
2463 }
2464
2465 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2466 {
2467         int ret;
2468         struct ethtool_tunable tuna;
2469         struct phy_device *phydev = dev->phydev;
2470         void *data;
2471
2472         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2473                 return -EOPNOTSUPP;
2474
2475         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2476                 return -EFAULT;
2477         ret = ethtool_phy_tunable_valid(&tuna);
2478         if (ret)
2479                 return ret;
2480         data = kmalloc(tuna.len, GFP_USER);
2481         if (!data)
2482                 return -ENOMEM;
2483         mutex_lock(&phydev->lock);
2484         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2485         mutex_unlock(&phydev->lock);
2486         if (ret)
2487                 goto out;
2488         useraddr += sizeof(tuna);
2489         ret = -EFAULT;
2490         if (copy_to_user(useraddr, data, tuna.len))
2491                 goto out;
2492         ret = 0;
2493
2494 out:
2495         kfree(data);
2496         return ret;
2497 }
2498
2499 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2500 {
2501         int ret;
2502         struct ethtool_tunable tuna;
2503         struct phy_device *phydev = dev->phydev;
2504         void *data;
2505
2506         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2507                 return -EOPNOTSUPP;
2508         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2509                 return -EFAULT;
2510         ret = ethtool_phy_tunable_valid(&tuna);
2511         if (ret)
2512                 return ret;
2513         useraddr += sizeof(tuna);
2514         data = memdup_user(useraddr, tuna.len);
2515         if (IS_ERR(data))
2516                 return PTR_ERR(data);
2517         mutex_lock(&phydev->lock);
2518         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2519         mutex_unlock(&phydev->lock);
2520
2521         kfree(data);
2522         return ret;
2523 }
2524
2525 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2526 {
2527         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2528         int rc;
2529
2530         if (!dev->ethtool_ops->get_fecparam)
2531                 return -EOPNOTSUPP;
2532
2533         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2534         if (rc)
2535                 return rc;
2536
2537         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2538                 return -EFAULT;
2539         return 0;
2540 }
2541
2542 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2543 {
2544         struct ethtool_fecparam fecparam;
2545
2546         if (!dev->ethtool_ops->set_fecparam)
2547                 return -EOPNOTSUPP;
2548
2549         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2550                 return -EFAULT;
2551
2552         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2553 }
2554
2555 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2556
2557 int dev_ethtool(struct net *net, struct ifreq *ifr)
2558 {
2559         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2560         void __user *useraddr = ifr->ifr_data;
2561         u32 ethcmd, sub_cmd;
2562         int rc;
2563         netdev_features_t old_features;
2564
2565         if (!dev || !netif_device_present(dev))
2566                 return -ENODEV;
2567
2568         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2569                 return -EFAULT;
2570
2571         if (ethcmd == ETHTOOL_PERQUEUE) {
2572                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2573                         return -EFAULT;
2574         } else {
2575                 sub_cmd = ethcmd;
2576         }
2577         /* Allow some commands to be done by anyone */
2578         switch (sub_cmd) {
2579         case ETHTOOL_GSET:
2580         case ETHTOOL_GDRVINFO:
2581         case ETHTOOL_GMSGLVL:
2582         case ETHTOOL_GLINK:
2583         case ETHTOOL_GCOALESCE:
2584         case ETHTOOL_GRINGPARAM:
2585         case ETHTOOL_GPAUSEPARAM:
2586         case ETHTOOL_GRXCSUM:
2587         case ETHTOOL_GTXCSUM:
2588         case ETHTOOL_GSG:
2589         case ETHTOOL_GSSET_INFO:
2590         case ETHTOOL_GSTRINGS:
2591         case ETHTOOL_GSTATS:
2592         case ETHTOOL_GPHYSTATS:
2593         case ETHTOOL_GTSO:
2594         case ETHTOOL_GPERMADDR:
2595         case ETHTOOL_GUFO:
2596         case ETHTOOL_GGSO:
2597         case ETHTOOL_GGRO:
2598         case ETHTOOL_GFLAGS:
2599         case ETHTOOL_GPFLAGS:
2600         case ETHTOOL_GRXFH:
2601         case ETHTOOL_GRXRINGS:
2602         case ETHTOOL_GRXCLSRLCNT:
2603         case ETHTOOL_GRXCLSRULE:
2604         case ETHTOOL_GRXCLSRLALL:
2605         case ETHTOOL_GRXFHINDIR:
2606         case ETHTOOL_GRSSH:
2607         case ETHTOOL_GFEATURES:
2608         case ETHTOOL_GCHANNELS:
2609         case ETHTOOL_GET_TS_INFO:
2610         case ETHTOOL_GEEE:
2611         case ETHTOOL_GTUNABLE:
2612         case ETHTOOL_PHY_GTUNABLE:
2613         case ETHTOOL_GLINKSETTINGS:
2614         case ETHTOOL_GFECPARAM:
2615                 break;
2616         default:
2617                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2618                         return -EPERM;
2619         }
2620
2621         if (dev->ethtool_ops->begin) {
2622                 rc = dev->ethtool_ops->begin(dev);
2623                 if (rc  < 0)
2624                         return rc;
2625         }
2626         old_features = dev->features;
2627
2628         switch (ethcmd) {
2629         case ETHTOOL_GSET:
2630                 rc = ethtool_get_settings(dev, useraddr);
2631                 break;
2632         case ETHTOOL_SSET:
2633                 rc = ethtool_set_settings(dev, useraddr);
2634                 break;
2635         case ETHTOOL_GDRVINFO:
2636                 rc = ethtool_get_drvinfo(dev, useraddr);
2637                 break;
2638         case ETHTOOL_GREGS:
2639                 rc = ethtool_get_regs(dev, useraddr);
2640                 break;
2641         case ETHTOOL_GWOL:
2642                 rc = ethtool_get_wol(dev, useraddr);
2643                 break;
2644         case ETHTOOL_SWOL:
2645                 rc = ethtool_set_wol(dev, useraddr);
2646                 break;
2647         case ETHTOOL_GMSGLVL:
2648                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2649                                        dev->ethtool_ops->get_msglevel);
2650                 break;
2651         case ETHTOOL_SMSGLVL:
2652                 rc = ethtool_set_value_void(dev, useraddr,
2653                                        dev->ethtool_ops->set_msglevel);
2654                 if (!rc)
2655                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2656                 break;
2657         case ETHTOOL_GEEE:
2658                 rc = ethtool_get_eee(dev, useraddr);
2659                 break;
2660         case ETHTOOL_SEEE:
2661                 rc = ethtool_set_eee(dev, useraddr);
2662                 break;
2663         case ETHTOOL_NWAY_RST:
2664                 rc = ethtool_nway_reset(dev);
2665                 break;
2666         case ETHTOOL_GLINK:
2667                 rc = ethtool_get_link(dev, useraddr);
2668                 break;
2669         case ETHTOOL_GEEPROM:
2670                 rc = ethtool_get_eeprom(dev, useraddr);
2671                 break;
2672         case ETHTOOL_SEEPROM:
2673                 rc = ethtool_set_eeprom(dev, useraddr);
2674                 break;
2675         case ETHTOOL_GCOALESCE:
2676                 rc = ethtool_get_coalesce(dev, useraddr);
2677                 break;
2678         case ETHTOOL_SCOALESCE:
2679                 rc = ethtool_set_coalesce(dev, useraddr);
2680                 break;
2681         case ETHTOOL_GRINGPARAM:
2682                 rc = ethtool_get_ringparam(dev, useraddr);
2683                 break;
2684         case ETHTOOL_SRINGPARAM:
2685                 rc = ethtool_set_ringparam(dev, useraddr);
2686                 break;
2687         case ETHTOOL_GPAUSEPARAM:
2688                 rc = ethtool_get_pauseparam(dev, useraddr);
2689                 break;
2690         case ETHTOOL_SPAUSEPARAM:
2691                 rc = ethtool_set_pauseparam(dev, useraddr);
2692                 break;
2693         case ETHTOOL_TEST:
2694                 rc = ethtool_self_test(dev, useraddr);
2695                 break;
2696         case ETHTOOL_GSTRINGS:
2697                 rc = ethtool_get_strings(dev, useraddr);
2698                 break;
2699         case ETHTOOL_PHYS_ID:
2700                 rc = ethtool_phys_id(dev, useraddr);
2701                 break;
2702         case ETHTOOL_GSTATS:
2703                 rc = ethtool_get_stats(dev, useraddr);
2704                 break;
2705         case ETHTOOL_GPERMADDR:
2706                 rc = ethtool_get_perm_addr(dev, useraddr);
2707                 break;
2708         case ETHTOOL_GFLAGS:
2709                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2710                                         __ethtool_get_flags);
2711                 break;
2712         case ETHTOOL_SFLAGS:
2713                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2714                 break;
2715         case ETHTOOL_GPFLAGS:
2716                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2717                                        dev->ethtool_ops->get_priv_flags);
2718                 if (!rc)
2719                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2720                 break;
2721         case ETHTOOL_SPFLAGS:
2722                 rc = ethtool_set_value(dev, useraddr,
2723                                        dev->ethtool_ops->set_priv_flags);
2724                 break;
2725         case ETHTOOL_GRXFH:
2726         case ETHTOOL_GRXRINGS:
2727         case ETHTOOL_GRXCLSRLCNT:
2728         case ETHTOOL_GRXCLSRULE:
2729         case ETHTOOL_GRXCLSRLALL:
2730                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2731                 break;
2732         case ETHTOOL_SRXFH:
2733         case ETHTOOL_SRXCLSRLDEL:
2734         case ETHTOOL_SRXCLSRLINS:
2735                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2736                 break;
2737         case ETHTOOL_FLASHDEV:
2738                 rc = ethtool_flash_device(dev, useraddr);
2739                 break;
2740         case ETHTOOL_RESET:
2741                 rc = ethtool_reset(dev, useraddr);
2742                 break;
2743         case ETHTOOL_GSSET_INFO:
2744                 rc = ethtool_get_sset_info(dev, useraddr);
2745                 break;
2746         case ETHTOOL_GRXFHINDIR:
2747                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2748                 break;
2749         case ETHTOOL_SRXFHINDIR:
2750                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2751                 break;
2752         case ETHTOOL_GRSSH:
2753                 rc = ethtool_get_rxfh(dev, useraddr);
2754                 break;
2755         case ETHTOOL_SRSSH:
2756                 rc = ethtool_set_rxfh(dev, useraddr);
2757                 break;
2758         case ETHTOOL_GFEATURES:
2759                 rc = ethtool_get_features(dev, useraddr);
2760                 break;
2761         case ETHTOOL_SFEATURES:
2762                 rc = ethtool_set_features(dev, useraddr);
2763                 break;
2764         case ETHTOOL_GTXCSUM:
2765         case ETHTOOL_GRXCSUM:
2766         case ETHTOOL_GSG:
2767         case ETHTOOL_GTSO:
2768         case ETHTOOL_GGSO:
2769         case ETHTOOL_GGRO:
2770                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2771                 break;
2772         case ETHTOOL_STXCSUM:
2773         case ETHTOOL_SRXCSUM:
2774         case ETHTOOL_SSG:
2775         case ETHTOOL_STSO:
2776         case ETHTOOL_SGSO:
2777         case ETHTOOL_SGRO:
2778                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2779                 break;
2780         case ETHTOOL_GCHANNELS:
2781                 rc = ethtool_get_channels(dev, useraddr);
2782                 break;
2783         case ETHTOOL_SCHANNELS:
2784                 rc = ethtool_set_channels(dev, useraddr);
2785                 break;
2786         case ETHTOOL_SET_DUMP:
2787                 rc = ethtool_set_dump(dev, useraddr);
2788                 break;
2789         case ETHTOOL_GET_DUMP_FLAG:
2790                 rc = ethtool_get_dump_flag(dev, useraddr);
2791                 break;
2792         case ETHTOOL_GET_DUMP_DATA:
2793                 rc = ethtool_get_dump_data(dev, useraddr);
2794                 break;
2795         case ETHTOOL_GET_TS_INFO:
2796                 rc = ethtool_get_ts_info(dev, useraddr);
2797                 break;
2798         case ETHTOOL_GMODULEINFO:
2799                 rc = ethtool_get_module_info(dev, useraddr);
2800                 break;
2801         case ETHTOOL_GMODULEEEPROM:
2802                 rc = ethtool_get_module_eeprom(dev, useraddr);
2803                 break;
2804         case ETHTOOL_GTUNABLE:
2805                 rc = ethtool_get_tunable(dev, useraddr);
2806                 break;
2807         case ETHTOOL_STUNABLE:
2808                 rc = ethtool_set_tunable(dev, useraddr);
2809                 break;
2810         case ETHTOOL_GPHYSTATS:
2811                 rc = ethtool_get_phy_stats(dev, useraddr);
2812                 break;
2813         case ETHTOOL_PERQUEUE:
2814                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2815                 break;
2816         case ETHTOOL_GLINKSETTINGS:
2817                 rc = ethtool_get_link_ksettings(dev, useraddr);
2818                 break;
2819         case ETHTOOL_SLINKSETTINGS:
2820                 rc = ethtool_set_link_ksettings(dev, useraddr);
2821                 break;
2822         case ETHTOOL_PHY_GTUNABLE:
2823                 rc = get_phy_tunable(dev, useraddr);
2824                 break;
2825         case ETHTOOL_PHY_STUNABLE:
2826                 rc = set_phy_tunable(dev, useraddr);
2827                 break;
2828         case ETHTOOL_GFECPARAM:
2829                 rc = ethtool_get_fecparam(dev, useraddr);
2830                 break;
2831         case ETHTOOL_SFECPARAM:
2832                 rc = ethtool_set_fecparam(dev, useraddr);
2833                 break;
2834         default:
2835                 rc = -EOPNOTSUPP;
2836         }
2837
2838         if (dev->ethtool_ops->complete)
2839                 dev->ethtool_ops->complete(dev);
2840
2841         if (old_features != dev->features)
2842                 netdev_features_change(dev);
2843
2844         return rc;
2845 }
2846
2847 struct ethtool_rx_flow_key {
2848         struct flow_dissector_key_basic                 basic;
2849         union {
2850                 struct flow_dissector_key_ipv4_addrs    ipv4;
2851                 struct flow_dissector_key_ipv6_addrs    ipv6;
2852         };
2853         struct flow_dissector_key_ports                 tp;
2854         struct flow_dissector_key_ip                    ip;
2855         struct flow_dissector_key_vlan                  vlan;
2856         struct flow_dissector_key_eth_addrs             eth_addrs;
2857 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2858
2859 struct ethtool_rx_flow_match {
2860         struct flow_dissector           dissector;
2861         struct ethtool_rx_flow_key      key;
2862         struct ethtool_rx_flow_key      mask;
2863 };
2864
2865 struct ethtool_rx_flow_rule *
2866 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2867 {
2868         const struct ethtool_rx_flow_spec *fs = input->fs;
2869         static struct in6_addr zero_addr = {};
2870         struct ethtool_rx_flow_match *match;
2871         struct ethtool_rx_flow_rule *flow;
2872         struct flow_action_entry *act;
2873
2874         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2875                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2876         if (!flow)
2877                 return ERR_PTR(-ENOMEM);
2878
2879         /* ethtool_rx supports only one single action per rule. */
2880         flow->rule = flow_rule_alloc(1);
2881         if (!flow->rule) {
2882                 kfree(flow);
2883                 return ERR_PTR(-ENOMEM);
2884         }
2885
2886         match = (struct ethtool_rx_flow_match *)flow->priv;
2887         flow->rule->match.dissector     = &match->dissector;
2888         flow->rule->match.mask          = &match->mask;
2889         flow->rule->match.key           = &match->key;
2890
2891         match->mask.basic.n_proto = htons(0xffff);
2892
2893         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2894         case ETHER_FLOW: {
2895                 const struct ethhdr *ether_spec, *ether_m_spec;
2896
2897                 ether_spec = &fs->h_u.ether_spec;
2898                 ether_m_spec = &fs->m_u.ether_spec;
2899
2900                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
2901                         ether_addr_copy(match->key.eth_addrs.src,
2902                                         ether_spec->h_source);
2903                         ether_addr_copy(match->mask.eth_addrs.src,
2904                                         ether_m_spec->h_source);
2905                 }
2906                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
2907                         ether_addr_copy(match->key.eth_addrs.dst,
2908                                         ether_spec->h_dest);
2909                         ether_addr_copy(match->mask.eth_addrs.dst,
2910                                         ether_m_spec->h_dest);
2911                 }
2912                 if (ether_m_spec->h_proto) {
2913                         match->key.basic.n_proto = ether_spec->h_proto;
2914                         match->mask.basic.n_proto = ether_m_spec->h_proto;
2915                 }
2916                 }
2917                 break;
2918         case TCP_V4_FLOW:
2919         case UDP_V4_FLOW: {
2920                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2921
2922                 match->key.basic.n_proto = htons(ETH_P_IP);
2923
2924                 v4_spec = &fs->h_u.tcp_ip4_spec;
2925                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2926
2927                 if (v4_m_spec->ip4src) {
2928                         match->key.ipv4.src = v4_spec->ip4src;
2929                         match->mask.ipv4.src = v4_m_spec->ip4src;
2930                 }
2931                 if (v4_m_spec->ip4dst) {
2932                         match->key.ipv4.dst = v4_spec->ip4dst;
2933                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
2934                 }
2935                 if (v4_m_spec->ip4src ||
2936                     v4_m_spec->ip4dst) {
2937                         match->dissector.used_keys |=
2938                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2939                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2940                                 offsetof(struct ethtool_rx_flow_key, ipv4);
2941                 }
2942                 if (v4_m_spec->psrc) {
2943                         match->key.tp.src = v4_spec->psrc;
2944                         match->mask.tp.src = v4_m_spec->psrc;
2945                 }
2946                 if (v4_m_spec->pdst) {
2947                         match->key.tp.dst = v4_spec->pdst;
2948                         match->mask.tp.dst = v4_m_spec->pdst;
2949                 }
2950                 if (v4_m_spec->psrc ||
2951                     v4_m_spec->pdst) {
2952                         match->dissector.used_keys |=
2953                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2954                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2955                                 offsetof(struct ethtool_rx_flow_key, tp);
2956                 }
2957                 if (v4_m_spec->tos) {
2958                         match->key.ip.tos = v4_spec->tos;
2959                         match->mask.ip.tos = v4_m_spec->tos;
2960                         match->dissector.used_keys |=
2961                                 BIT(FLOW_DISSECTOR_KEY_IP);
2962                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2963                                 offsetof(struct ethtool_rx_flow_key, ip);
2964                 }
2965                 }
2966                 break;
2967         case TCP_V6_FLOW:
2968         case UDP_V6_FLOW: {
2969                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2970
2971                 match->key.basic.n_proto = htons(ETH_P_IPV6);
2972
2973                 v6_spec = &fs->h_u.tcp_ip6_spec;
2974                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2975                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2976                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2977                                sizeof(match->key.ipv6.src));
2978                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2979                                sizeof(match->mask.ipv6.src));
2980                 }
2981                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2982                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2983                                sizeof(match->key.ipv6.dst));
2984                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2985                                sizeof(match->mask.ipv6.dst));
2986                 }
2987                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2988                     memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2989                         match->dissector.used_keys |=
2990                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2991                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2992                                 offsetof(struct ethtool_rx_flow_key, ipv6);
2993                 }
2994                 if (v6_m_spec->psrc) {
2995                         match->key.tp.src = v6_spec->psrc;
2996                         match->mask.tp.src = v6_m_spec->psrc;
2997                 }
2998                 if (v6_m_spec->pdst) {
2999                         match->key.tp.dst = v6_spec->pdst;
3000                         match->mask.tp.dst = v6_m_spec->pdst;
3001                 }
3002                 if (v6_m_spec->psrc ||
3003                     v6_m_spec->pdst) {
3004                         match->dissector.used_keys |=
3005                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
3006                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3007                                 offsetof(struct ethtool_rx_flow_key, tp);
3008                 }
3009                 if (v6_m_spec->tclass) {
3010                         match->key.ip.tos = v6_spec->tclass;
3011                         match->mask.ip.tos = v6_m_spec->tclass;
3012                         match->dissector.used_keys |=
3013                                 BIT(FLOW_DISSECTOR_KEY_IP);
3014                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3015                                 offsetof(struct ethtool_rx_flow_key, ip);
3016                 }
3017                 }
3018                 break;
3019         default:
3020                 ethtool_rx_flow_rule_destroy(flow);
3021                 return ERR_PTR(-EINVAL);
3022         }
3023
3024         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3025         case TCP_V4_FLOW:
3026         case TCP_V6_FLOW:
3027                 match->key.basic.ip_proto = IPPROTO_TCP;
3028                 break;
3029         case UDP_V4_FLOW:
3030         case UDP_V6_FLOW:
3031                 match->key.basic.ip_proto = IPPROTO_UDP;
3032                 break;
3033         }
3034         match->mask.basic.ip_proto = 0xff;
3035
3036         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3037         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3038                 offsetof(struct ethtool_rx_flow_key, basic);
3039
3040         if (fs->flow_type & FLOW_EXT) {
3041                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3042                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3043
3044                 if (ext_m_spec->vlan_etype) {
3045                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3046                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3047                 }
3048
3049                 if (ext_m_spec->vlan_tci) {
3050                         match->key.vlan.vlan_id =
3051                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3052                         match->mask.vlan.vlan_id =
3053                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3054
3055                         match->key.vlan.vlan_dei =
3056                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3057                         match->mask.vlan.vlan_dei =
3058                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3059
3060                         match->key.vlan.vlan_priority =
3061                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3062                         match->mask.vlan.vlan_priority =
3063                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3064                 }
3065
3066                 if (ext_m_spec->vlan_etype ||
3067                     ext_m_spec->vlan_tci) {
3068                         match->dissector.used_keys |=
3069                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
3070                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3071                                 offsetof(struct ethtool_rx_flow_key, vlan);
3072                 }
3073         }
3074         if (fs->flow_type & FLOW_MAC_EXT) {
3075                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3076                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3077
3078                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3079                        ETH_ALEN);
3080                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3081                        ETH_ALEN);
3082
3083                 match->dissector.used_keys |=
3084                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3085                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3086                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3087         }
3088
3089         act = &flow->rule->action.entries[0];
3090         switch (fs->ring_cookie) {
3091         case RX_CLS_FLOW_DISC:
3092                 act->id = FLOW_ACTION_DROP;
3093                 break;
3094         case RX_CLS_FLOW_WAKE:
3095                 act->id = FLOW_ACTION_WAKE;
3096                 break;
3097         default:
3098                 act->id = FLOW_ACTION_QUEUE;
3099                 if (fs->flow_type & FLOW_RSS)
3100                         act->queue.ctx = input->rss_ctx;
3101
3102                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3103                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3104                 break;
3105         }
3106
3107         return flow;
3108 }
3109 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3110
3111 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3112 {
3113         kfree(flow->rule);
3114         kfree(flow);
3115 }
3116 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);