net/ethtool/ioctl.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/ethtool.c - Ethtool ioctl handler
   4  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   5  *
   6  * This file is where we call all the ethtool_ops commands to get
   7  * the information ethtool needs.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/types.h>
  12 #include <linux/capability.h>
  13 #include <linux/errno.h>
  14 #include <linux/ethtool.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/net_tstamp.h>
  17 #include <linux/phy.h>
  18 #include <linux/bitops.h>
  19 #include <linux/uaccess.h>
  20 #include <linux/vermagic.h>
  21 #include <linux/vmalloc.h>
  22 #include <linux/sfp.h>
  23 #include <linux/slab.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/sched/signal.h>
  26 #include <linux/net.h>
  27 #include <net/devlink.h>
  28 #include <net/xdp_sock.h>
  29 #include <net/flow_offload.h>
  30 #include <linux/ethtool_netlink.h>
  31
  32 #include "common.h"
  33
  34 /*
  35  * Some useful ethtool_ops methods that're device independent.
  36  * If we find that all drivers want to do the same thing here,
  37  * we can turn these into dev_() function calls.
  38  */
  39
  40 u32 ethtool_op_get_link(struct net_device *dev)
  41 {
  42         return netif_carrier_ok(dev) ? 1 : 0;
  43 }
  44 EXPORT_SYMBOL(ethtool_op_get_link);
  45
  46 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  47 {
  48         info->so_timestamping =
  49                 SOF_TIMESTAMPING_TX_SOFTWARE |
  50                 SOF_TIMESTAMPING_RX_SOFTWARE |
  51                 SOF_TIMESTAMPING_SOFTWARE;
  52         info->phc_index = -1;
  53         return 0;
  54 }
  55 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  56
  57 /* Handlers for each ethtool command */
  58
  59 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
  60
  61 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  62 {
  63         struct ethtool_gfeatures cmd = {
  64                 .cmd = ETHTOOL_GFEATURES,
  65                 .size = ETHTOOL_DEV_FEATURE_WORDS,
  66         };
  67         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  68         u32 __user *sizeaddr;
  69         u32 copy_size;
  70         int i;
  71
  72         /* in case feature bits run out again */
  73         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  74
  75         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  76                 features[i].available = (u32)(dev->hw_features >> (32 * i));
  77                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
  78                 features[i].active = (u32)(dev->features >> (32 * i));
  79                 features[i].never_changed =
  80                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
  81         }
  82
  83         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
  84         if (get_user(copy_size, sizeaddr))
  85                 return -EFAULT;
  86
  87         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
  88                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
  89
  90         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
  91                 return -EFAULT;
  92         useraddr += sizeof(cmd);
  93         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
  94                 return -EFAULT;
  95
  96         return 0;
  97 }
  98
  99 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 100 {
 101         struct ethtool_sfeatures cmd;
 102         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 103         netdev_features_t wanted = 0, valid = 0;
 104         int i, ret = 0;
 105
 106         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 107                 return -EFAULT;
 108         useraddr += sizeof(cmd);
 109
 110         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 111                 return -EINVAL;
 112
 113         if (copy_from_user(features, useraddr, sizeof(features)))
 114                 return -EFAULT;
 115
 116         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 117                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 118                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 119         }
 120
 121         if (valid & ~NETIF_F_ETHTOOL_BITS)
 122                 return -EINVAL;
 123
 124         if (valid & ~dev->hw_features) {
 125                 valid &= dev->hw_features;
 126                 ret |= ETHTOOL_F_UNSUPPORTED;
 127         }
 128
 129         dev->wanted_features &= ~valid;
 130         dev->wanted_features |= wanted & valid;
 131         __netdev_update_features(dev);
 132
 133         if ((dev->wanted_features ^ dev->features) & valid)
 134                 ret |= ETHTOOL_F_WISH;
 135
 136         return ret;
 137 }
 138
 139 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 140 {
 141         const struct ethtool_ops *ops = dev->ethtool_ops;
 142
 143         if (sset == ETH_SS_FEATURES)
 144                 return ARRAY_SIZE(netdev_features_strings);
 145
 146         if (sset == ETH_SS_RSS_HASH_FUNCS)
 147                 return ARRAY_SIZE(rss_hash_func_strings);
 148
 149         if (sset == ETH_SS_TUNABLES)
 150                 return ARRAY_SIZE(tunable_strings);
 151
 152         if (sset == ETH_SS_PHY_TUNABLES)
 153                 return ARRAY_SIZE(phy_tunable_strings);
 154
 155         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 156             !ops->get_ethtool_phy_stats)
 157                 return phy_ethtool_get_sset_count(dev->phydev);
 158
 159         if (sset == ETH_SS_LINK_MODES)
 160                 return __ETHTOOL_LINK_MODE_MASK_NBITS;
 161
 162         if (ops->get_sset_count && ops->get_strings)
 163                 return ops->get_sset_count(dev, sset);
 164         else
 165                 return -EOPNOTSUPP;
 166 }
 167
 168 static void __ethtool_get_strings(struct net_device *dev,
 169         u32 stringset, u8 *data)
 170 {
 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)
 185                 phy_ethtool_get_strings(dev->phydev, data);
 186         else if (stringset == ETH_SS_LINK_MODES)
 187                 memcpy(data, link_mode_names,
 188                        __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 189         else
 190                 /* ops->get_strings is valid because checked earlier */
 191                 ops->get_strings(dev, stringset, data);
 192 }
 193
 194 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 195 {
 196         /* feature masks of legacy discrete ethtool ops */
 197
 198         switch (eth_cmd) {
 199         case ETHTOOL_GTXCSUM:
 200         case ETHTOOL_STXCSUM:
 201                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 202         case ETHTOOL_GRXCSUM:
 203         case ETHTOOL_SRXCSUM:
 204                 return NETIF_F_RXCSUM;
 205         case ETHTOOL_GSG:
 206         case ETHTOOL_SSG:
 207                 return NETIF_F_SG;
 208         case ETHTOOL_GTSO:
 209         case ETHTOOL_STSO:
 210                 return NETIF_F_ALL_TSO;
 211         case ETHTOOL_GGSO:
 212         case ETHTOOL_SGSO:
 213                 return NETIF_F_GSO;
 214         case ETHTOOL_GGRO:
 215         case ETHTOOL_SGRO:
 216                 return NETIF_F_GRO;
 217         default:
 218                 BUG();
 219         }
 220 }
 221
 222 static int ethtool_get_one_feature(struct net_device *dev,
 223         char __user *useraddr, u32 ethcmd)
 224 {
 225         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 226         struct ethtool_value edata = {
 227                 .cmd = ethcmd,
 228                 .data = !!(dev->features & mask),
 229         };
 230
 231         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 232                 return -EFAULT;
 233         return 0;
 234 }
 235
 236 static int ethtool_set_one_feature(struct net_device *dev,
 237         void __user *useraddr, u32 ethcmd)
 238 {
 239         struct ethtool_value edata;
 240         netdev_features_t mask;
 241
 242         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 243                 return -EFAULT;
 244
 245         mask = ethtool_get_feature_mask(ethcmd);
 246         mask &= dev->hw_features;
 247         if (!mask)
 248                 return -EOPNOTSUPP;
 249
 250         if (edata.data)
 251                 dev->wanted_features |= mask;
 252         else
 253                 dev->wanted_features &= ~mask;
 254
 255         __netdev_update_features(dev);
 256
 257         return 0;
 258 }
 259
 260 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 261                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 262 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 263                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 264                           NETIF_F_RXHASH)
 265
 266 static u32 __ethtool_get_flags(struct net_device *dev)
 267 {
 268         u32 flags = 0;
 269
 270         if (dev->features & NETIF_F_LRO)
 271                 flags |= ETH_FLAG_LRO;
 272         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 273                 flags |= ETH_FLAG_RXVLAN;
 274         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 275                 flags |= ETH_FLAG_TXVLAN;
 276         if (dev->features & NETIF_F_NTUPLE)
 277                 flags |= ETH_FLAG_NTUPLE;
 278         if (dev->features & NETIF_F_RXHASH)
 279                 flags |= ETH_FLAG_RXHASH;
 280
 281         return flags;
 282 }
 283
 284 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 285 {
 286         netdev_features_t features = 0, changed;
 287
 288         if (data & ~ETH_ALL_FLAGS)
 289                 return -EINVAL;
 290
 291         if (data & ETH_FLAG_LRO)
 292                 features |= NETIF_F_LRO;
 293         if (data & ETH_FLAG_RXVLAN)
 294                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 295         if (data & ETH_FLAG_TXVLAN)
 296                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 297         if (data & ETH_FLAG_NTUPLE)
 298                 features |= NETIF_F_NTUPLE;
 299         if (data & ETH_FLAG_RXHASH)
 300                 features |= NETIF_F_RXHASH;
 301
 302         /* allow changing only bits set in hw_features */
 303         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 304         if (changed & ~dev->hw_features)
 305                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 306
 307         dev->wanted_features =
 308                 (dev->wanted_features & ~changed) | (features & changed);
 309
 310         __netdev_update_features(dev);
 311
 312         return 0;
 313 }
 314
 315 /* Given two link masks, AND them together and save the result in dst. */
 316 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 317                                   struct ethtool_link_ksettings *src)
 318 {
 319         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 320         unsigned int idx = 0;
 321
 322         for (; idx < size; idx++) {
 323                 dst->link_modes.supported[idx] &=
 324                         src->link_modes.supported[idx];
 325                 dst->link_modes.advertising[idx] &=
 326                         src->link_modes.advertising[idx];
 327         }
 328 }
 329 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 330
 331 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 332                                              u32 legacy_u32)
 333 {
 334         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 335         dst[0] = legacy_u32;
 336 }
 337 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 338
 339 /* return false if src had higher bits set. lower bits always updated. */
 340 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 341                                              const unsigned long *src)
 342 {
 343         bool retval = true;
 344
 345         /* TODO: following test will soon always be true */
 346         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 347                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 348
 349                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 350                 bitmap_fill(ext, 32);
 351                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 352                 if (bitmap_intersects(ext, src,
 353                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 354                         /* src mask goes beyond bit 31 */
 355                         retval = false;
 356                 }
 357         }
 358         *legacy_u32 = src[0];
 359         return retval;
 360 }
 361 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 362
 363 /* return false if ksettings link modes had higher bits
 364  * set. legacy_settings always updated (best effort)
 365  */
 366 static bool
 367 convert_link_ksettings_to_legacy_settings(
 368         struct ethtool_cmd *legacy_settings,
 369         const struct ethtool_link_ksettings *link_ksettings)
 370 {
 371         bool retval = true;
 372
 373         memset(legacy_settings, 0, sizeof(*legacy_settings));
 374         /* this also clears the deprecated fields in legacy structure:
 375          * __u8         transceiver;
 376          * __u32        maxtxpkt;
 377          * __u32        maxrxpkt;
 378          */
 379
 380         retval &= ethtool_convert_link_mode_to_legacy_u32(
 381                 &legacy_settings->supported,
 382                 link_ksettings->link_modes.supported);
 383         retval &= ethtool_convert_link_mode_to_legacy_u32(
 384                 &legacy_settings->advertising,
 385                 link_ksettings->link_modes.advertising);
 386         retval &= ethtool_convert_link_mode_to_legacy_u32(
 387                 &legacy_settings->lp_advertising,
 388                 link_ksettings->link_modes.lp_advertising);
 389         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 390         legacy_settings->duplex
 391                 = link_ksettings->base.duplex;
 392         legacy_settings->port
 393                 = link_ksettings->base.port;
 394         legacy_settings->phy_address
 395                 = link_ksettings->base.phy_address;
 396         legacy_settings->autoneg
 397                 = link_ksettings->base.autoneg;
 398         legacy_settings->mdio_support
 399                 = link_ksettings->base.mdio_support;
 400         legacy_settings->eth_tp_mdix
 401                 = link_ksettings->base.eth_tp_mdix;
 402         legacy_settings->eth_tp_mdix_ctrl
 403                 = link_ksettings->base.eth_tp_mdix_ctrl;
 404         legacy_settings->transceiver
 405                 = link_ksettings->base.transceiver;
 406         return retval;
 407 }
 408
 409 /* number of 32-bit words to store the user's link mode bitmaps */
 410 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 411         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 412
 413 /* layout of the struct passed from/to userland */
 414 struct ethtool_link_usettings {
 415         struct ethtool_link_settings base;
 416         struct {
 417                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 418                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 419                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 420         } link_modes;
 421 };
 422
 423 /* Internal kernel helper to query a device ethtool_link_settings. */
 424 int __ethtool_get_link_ksettings(struct net_device *dev,
 425                                  struct ethtool_link_ksettings *link_ksettings)
 426 {
 427         ASSERT_RTNL();
 428
 429         if (!dev->ethtool_ops->get_link_ksettings)
 430                 return -EOPNOTSUPP;
 431
 432         memset(link_ksettings, 0, sizeof(*link_ksettings));
 433         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 434 }
 435 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 436
 437 /* convert ethtool_link_usettings in user space to a kernel internal
 438  * ethtool_link_ksettings. return 0 on success, errno on error.
 439  */
 440 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 441                                          const void __user *from)
 442 {
 443         struct ethtool_link_usettings link_usettings;
 444
 445         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 446                 return -EFAULT;
 447
 448         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 449         bitmap_from_arr32(to->link_modes.supported,
 450                           link_usettings.link_modes.supported,
 451                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 452         bitmap_from_arr32(to->link_modes.advertising,
 453                           link_usettings.link_modes.advertising,
 454                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 455         bitmap_from_arr32(to->link_modes.lp_advertising,
 456                           link_usettings.link_modes.lp_advertising,
 457                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 458
 459         return 0;
 460 }
 461
 462 /* convert a kernel internal ethtool_link_ksettings to
 463  * ethtool_link_usettings in user space. return 0 on success, errno on
 464  * error.
 465  */
 466 static int
 467 store_link_ksettings_for_user(void __user *to,
 468                               const struct ethtool_link_ksettings *from)
 469 {
 470         struct ethtool_link_usettings link_usettings;
 471
 472         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 473         bitmap_to_arr32(link_usettings.link_modes.supported,
 474                         from->link_modes.supported,
 475                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 476         bitmap_to_arr32(link_usettings.link_modes.advertising,
 477                         from->link_modes.advertising,
 478                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 479         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 480                         from->link_modes.lp_advertising,
 481                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 482
 483         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 484                 return -EFAULT;
 485
 486         return 0;
 487 }
 488
 489 /* Query device for its ethtool_link_settings. */
 490 static int ethtool_get_link_ksettings(struct net_device *dev,
 491                                       void __user *useraddr)
 492 {
 493         int err = 0;
 494         struct ethtool_link_ksettings link_ksettings;
 495
 496         ASSERT_RTNL();
 497         if (!dev->ethtool_ops->get_link_ksettings)
 498                 return -EOPNOTSUPP;
 499
 500         /* handle bitmap nbits handshake */
 501         if (copy_from_user(&link_ksettings.base, useraddr,
 502                            sizeof(link_ksettings.base)))
 503                 return -EFAULT;
 504
 505         if (__ETHTOOL_LINK_MODE_MASK_NU32
 506             != link_ksettings.base.link_mode_masks_nwords) {
 507                 /* wrong link mode nbits requested */
 508                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 509                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 510                 /* send back number of words required as negative val */
 511                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 512                                    "need too many bits for link modes!");
 513                 link_ksettings.base.link_mode_masks_nwords
 514                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 515
 516                 /* copy the base fields back to user, not the link
 517                  * mode bitmaps
 518                  */
 519                 if (copy_to_user(useraddr, &link_ksettings.base,
 520                                  sizeof(link_ksettings.base)))
 521                         return -EFAULT;
 522
 523                 return 0;
 524         }
 525
 526         /* handshake successful: user/kernel agree on
 527          * link_mode_masks_nwords
 528          */
 529
 530         memset(&link_ksettings, 0, sizeof(link_ksettings));
 531         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 532         if (err < 0)
 533                 return err;
 534
 535         /* make sure we tell the right values to user */
 536         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 537         link_ksettings.base.link_mode_masks_nwords
 538                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 539
 540         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 541 }
 542
 543 /* Update device ethtool_link_settings. */
 544 static int ethtool_set_link_ksettings(struct net_device *dev,
 545                                       void __user *useraddr)
 546 {
 547         int err;
 548         struct ethtool_link_ksettings link_ksettings;
 549
 550         ASSERT_RTNL();
 551
 552         if (!dev->ethtool_ops->set_link_ksettings)
 553                 return -EOPNOTSUPP;
 554
 555         /* make sure nbits field has expected value */
 556         if (copy_from_user(&link_ksettings.base, useraddr,
 557                            sizeof(link_ksettings.base)))
 558                 return -EFAULT;
 559
 560         if (__ETHTOOL_LINK_MODE_MASK_NU32
 561             != link_ksettings.base.link_mode_masks_nwords)
 562                 return -EINVAL;
 563
 564         /* copy the whole structure, now that we know it has expected
 565          * format
 566          */
 567         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 568         if (err)
 569                 return err;
 570
 571         /* re-check nwords field, just in case */
 572         if (__ETHTOOL_LINK_MODE_MASK_NU32
 573             != link_ksettings.base.link_mode_masks_nwords)
 574                 return -EINVAL;
 575
 576         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 577         if (err >= 0) {
 578                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 579                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 580         }
 581         return err;
 582 }
 583
 584 /* Query device for its ethtool_cmd settings.
 585  *
 586  * Backward compatibility note: for compatibility with legacy ethtool, this is
 587  * now implemented via get_link_ksettings. When driver reports higher link mode
 588  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 589  * recommend user to upgrade ethtool, but the command is successful (only the
 590  * lower link mode bits reported back to user). Deprecated fields from
 591  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 592  */
 593 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 594 {
 595         struct ethtool_link_ksettings link_ksettings;
 596         struct ethtool_cmd cmd;
 597         int err;
 598
 599         ASSERT_RTNL();
 600         if (!dev->ethtool_ops->get_link_ksettings)
 601                 return -EOPNOTSUPP;
 602
 603         memset(&link_ksettings, 0, sizeof(link_ksettings));
 604         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 605         if (err < 0)
 606                 return err;
 607         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 608
 609         /* send a sensible cmd tag back to user */
 610         cmd.cmd = ETHTOOL_GSET;
 611
 612         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 613                 return -EFAULT;
 614
 615         return 0;
 616 }
 617
 618 /* Update device link settings with given ethtool_cmd.
 619  *
 620  * Backward compatibility note: for compatibility with legacy ethtool, this is
 621  * now always implemented via set_link_settings. When user's request updates
 622  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 623  * warning is logged once (with name of 1st driver/device) to recommend user to
 624  * upgrade ethtool, and the request is rejected.
 625  */
 626 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 627 {
 628         struct ethtool_link_ksettings link_ksettings;
 629         struct ethtool_cmd cmd;
 630         int ret;
 631
 632         ASSERT_RTNL();
 633
 634         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 635                 return -EFAULT;
 636         if (!dev->ethtool_ops->set_link_ksettings)
 637                 return -EOPNOTSUPP;
 638
 639         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 640                 return -EINVAL;
 641         link_ksettings.base.link_mode_masks_nwords =
 642                 __ETHTOOL_LINK_MODE_MASK_NU32;
 643         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 644         if (ret >= 0) {
 645                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 646                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 647         }
 648         return ret;
 649 }
 650
 651 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 652                                                   void __user *useraddr)
 653 {
 654         struct ethtool_drvinfo info;
 655         const struct ethtool_ops *ops = dev->ethtool_ops;
 656
 657         memset(&info, 0, sizeof(info));
 658         info.cmd = ETHTOOL_GDRVINFO;
 659         strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
 660         if (ops->get_drvinfo) {
 661                 ops->get_drvinfo(dev, &info);
 662         } else if (dev->dev.parent && dev->dev.parent->driver) {
 663                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 664                         sizeof(info.bus_info));
 665                 strlcpy(info.driver, dev->dev.parent->driver->name,
 666                         sizeof(info.driver));
 667         } else {
 668                 return -EOPNOTSUPP;
 669         }
 670
 671         /*
 672          * this method of obtaining string set info is deprecated;
 673          * Use ETHTOOL_GSSET_INFO instead.
 674          */
 675         if (ops->get_sset_count) {
 676                 int rc;
 677
 678                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 679                 if (rc >= 0)
 680                         info.testinfo_len = rc;
 681                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 682                 if (rc >= 0)
 683                         info.n_stats = rc;
 684                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 685                 if (rc >= 0)
 686                         info.n_priv_flags = rc;
 687         }
 688         if (ops->get_regs_len) {
 689                 int ret = ops->get_regs_len(dev);
 690
 691                 if (ret > 0)
 692                         info.regdump_len = ret;
 693         }
 694
 695         if (ops->get_eeprom_len)
 696                 info.eedump_len = ops->get_eeprom_len(dev);
 697
 698         if (!info.fw_version[0])
 699                 devlink_compat_running_version(dev, info.fw_version,
 700                                                sizeof(info.fw_version));
 701
 702         if (copy_to_user(useraddr, &info, sizeof(info)))
 703                 return -EFAULT;
 704         return 0;
 705 }
 706
 707 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 708                                                     void __user *useraddr)
 709 {
 710         struct ethtool_sset_info info;
 711         u64 sset_mask;
 712         int i, idx = 0, n_bits = 0, ret, rc;
 713         u32 *info_buf = NULL;
 714
 715         if (copy_from_user(&info, useraddr, sizeof(info)))
 716                 return -EFAULT;
 717
 718         /* store copy of mask, because we zero struct later on */
 719         sset_mask = info.sset_mask;
 720         if (!sset_mask)
 721                 return 0;
 722
 723         /* calculate size of return buffer */
 724         n_bits = hweight64(sset_mask);
 725
 726         memset(&info, 0, sizeof(info));
 727         info.cmd = ETHTOOL_GSSET_INFO;
 728
 729         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 730         if (!info_buf)
 731                 return -ENOMEM;
 732
 733         /*
 734          * fill return buffer based on input bitmask and successful
 735          * get_sset_count return
 736          */
 737         for (i = 0; i < 64; i++) {
 738                 if (!(sset_mask & (1ULL << i)))
 739                         continue;
 740
 741                 rc = __ethtool_get_sset_count(dev, i);
 742                 if (rc >= 0) {
 743                         info.sset_mask |= (1ULL << i);
 744                         info_buf[idx++] = rc;
 745                 }
 746         }
 747
 748         ret = -EFAULT;
 749         if (copy_to_user(useraddr, &info, sizeof(info)))
 750                 goto out;
 751
 752         useraddr += offsetof(struct ethtool_sset_info, data);
 753         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 754                 goto out;
 755
 756         ret = 0;
 757
 758 out:
 759         kfree(info_buf);
 760         return ret;
 761 }
 762
 763 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 764                                                 u32 cmd, void __user *useraddr)
 765 {
 766         struct ethtool_rxnfc info;
 767         size_t info_size = sizeof(info);
 768         int rc;
 769
 770         if (!dev->ethtool_ops->set_rxnfc)
 771                 return -EOPNOTSUPP;
 772
 773         /* struct ethtool_rxnfc was originally defined for
 774          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 775          * members.  User-space might still be using that
 776          * definition. */
 777         if (cmd == ETHTOOL_SRXFH)
 778                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 779                              sizeof(info.data));
 780
 781         if (copy_from_user(&info, useraddr, info_size))
 782                 return -EFAULT;
 783
 784         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 785         if (rc)
 786                 return rc;
 787
 788         if (cmd == ETHTOOL_SRXCLSRLINS &&
 789             copy_to_user(useraddr, &info, info_size))
 790                 return -EFAULT;
 791
 792         return 0;
 793 }
 794
 795 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 796                                                 u32 cmd, void __user *useraddr)
 797 {
 798         struct ethtool_rxnfc info;
 799         size_t info_size = sizeof(info);
 800         const struct ethtool_ops *ops = dev->ethtool_ops;
 801         int ret;
 802         void *rule_buf = NULL;
 803
 804         if (!ops->get_rxnfc)
 805                 return -EOPNOTSUPP;
 806
 807         /* struct ethtool_rxnfc was originally defined for
 808          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 809          * members.  User-space might still be using that
 810          * definition. */
 811         if (cmd == ETHTOOL_GRXFH)
 812                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 813                              sizeof(info.data));
 814
 815         if (copy_from_user(&info, useraddr, info_size))
 816                 return -EFAULT;
 817
 818         /* If FLOW_RSS was requested then user-space must be using the
 819          * new definition, as FLOW_RSS is newer.
 820          */
 821         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
 822                 info_size = sizeof(info);
 823                 if (copy_from_user(&info, useraddr, info_size))
 824                         return -EFAULT;
 825                 /* Since malicious users may modify the original data,
 826                  * we need to check whether FLOW_RSS is still requested.
 827                  */
 828                 if (!(info.flow_type & FLOW_RSS))
 829                         return -EINVAL;
 830         }
 831
 832         if (info.cmd != cmd)
 833                 return -EINVAL;
 834
 835         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 836                 if (info.rule_cnt > 0) {
 837                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
 838                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
 839                                                    GFP_USER);
 840                         if (!rule_buf)
 841                                 return -ENOMEM;
 842                 }
 843         }
 844
 845         ret = ops->get_rxnfc(dev, &info, rule_buf);
 846         if (ret < 0)
 847                 goto err_out;
 848
 849         ret = -EFAULT;
 850         if (copy_to_user(useraddr, &info, info_size))
 851                 goto err_out;
 852
 853         if (rule_buf) {
 854                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 855                 if (copy_to_user(useraddr, rule_buf,
 856                                  info.rule_cnt * sizeof(u32)))
 857                         goto err_out;
 858         }
 859         ret = 0;
 860
 861 err_out:
 862         kfree(rule_buf);
 863
 864         return ret;
 865 }
 866
 867 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
 868                                         struct ethtool_rxnfc *rx_rings,
 869                                         u32 size)
 870 {
 871         int i;
 872
 873         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
 874                 return -EFAULT;
 875
 876         /* Validate ring indices */
 877         for (i = 0; i < size; i++)
 878                 if (indir[i] >= rx_rings->data)
 879                         return -EINVAL;
 880
 881         return 0;
 882 }
 883
 884 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
 885
 886 void netdev_rss_key_fill(void *buffer, size_t len)
 887 {
 888         BUG_ON(len > sizeof(netdev_rss_key));
 889         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
 890         memcpy(buffer, netdev_rss_key, len);
 891 }
 892 EXPORT_SYMBOL(netdev_rss_key_fill);
 893
 894 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
 895 {
 896         u32 dev_size, current_max = 0;
 897         u32 *indir;
 898         int ret;
 899
 900         if (!dev->ethtool_ops->get_rxfh_indir_size ||
 901             !dev->ethtool_ops->get_rxfh)
 902                 return -EOPNOTSUPP;
 903         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
 904         if (dev_size == 0)
 905                 return -EOPNOTSUPP;
 906
 907         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
 908         if (!indir)
 909                 return -ENOMEM;
 910
 911         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
 912         if (ret)
 913                 goto out;
 914
 915         while (dev_size--)
 916                 current_max = max(current_max, indir[dev_size]);
 917
 918         *max = current_max;
 919
 920 out:
 921         kfree(indir);
 922         return ret;
 923 }
 924
 925 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
 926                                                      void __user *useraddr)
 927 {
 928         u32 user_size, dev_size;
 929         u32 *indir;
 930         int ret;
 931
 932         if (!dev->ethtool_ops->get_rxfh_indir_size ||
 933             !dev->ethtool_ops->get_rxfh)
 934                 return -EOPNOTSUPP;
 935         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
 936         if (dev_size == 0)
 937                 return -EOPNOTSUPP;
 938
 939         if (copy_from_user(&user_size,
 940                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 941                            sizeof(user_size)))
 942                 return -EFAULT;
 943
 944         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
 945                          &dev_size, sizeof(dev_size)))
 946                 return -EFAULT;
 947
 948         /* If the user buffer size is 0, this is just a query for the
 949          * device table size.  Otherwise, if it's smaller than the
 950          * device table size it's an error.
 951          */
 952         if (user_size < dev_size)
 953                 return user_size == 0 ? 0 : -EINVAL;
 954
 955         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
 956         if (!indir)
 957                 return -ENOMEM;
 958
 959         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
 960         if (ret)
 961                 goto out;
 962
 963         if (copy_to_user(useraddr +
 964                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
 965                          indir, dev_size * sizeof(indir[0])))
 966                 ret = -EFAULT;
 967
 968 out:
 969         kfree(indir);
 970         return ret;
 971 }
 972
 973 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
 974                                                      void __user *useraddr)
 975 {
 976         struct ethtool_rxnfc rx_rings;
 977         u32 user_size, dev_size, i;
 978         u32 *indir;
 979         const struct ethtool_ops *ops = dev->ethtool_ops;
 980         int ret;
 981         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
 982
 983         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
 984             !ops->get_rxnfc)
 985                 return -EOPNOTSUPP;
 986
 987         dev_size = ops->get_rxfh_indir_size(dev);
 988         if (dev_size == 0)
 989                 return -EOPNOTSUPP;
 990
 991         if (copy_from_user(&user_size,
 992                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 993                            sizeof(user_size)))
 994                 return -EFAULT;
 995
 996         if (user_size != 0 && user_size != dev_size)
 997                 return -EINVAL;
 998
 999         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1000         if (!indir)
1001                 return -ENOMEM;
1002
1003         rx_rings.cmd = ETHTOOL_GRXRINGS;
1004         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1005         if (ret)
1006                 goto out;
1007
1008         if (user_size == 0) {
1009                 for (i = 0; i < dev_size; i++)
1010                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1011         } else {
1012                 ret = ethtool_copy_validate_indir(indir,
1013                                                   useraddr + ringidx_offset,
1014                                                   &rx_rings,
1015                                                   dev_size);
1016                 if (ret)
1017                         goto out;
1018         }
1019
1020         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1021         if (ret)
1022                 goto out;
1023
1024         /* indicate whether rxfh was set to default */
1025         if (user_size == 0)
1026                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1027         else
1028                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1029
1030 out:
1031         kfree(indir);
1032         return ret;
1033 }
1034
1035 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1036                                                void __user *useraddr)
1037 {
1038         int ret;
1039         const struct ethtool_ops *ops = dev->ethtool_ops;
1040         u32 user_indir_size, user_key_size;
1041         u32 dev_indir_size = 0, dev_key_size = 0;
1042         struct ethtool_rxfh rxfh;
1043         u32 total_size;
1044         u32 indir_bytes;
1045         u32 *indir = NULL;
1046         u8 dev_hfunc = 0;
1047         u8 *hkey = NULL;
1048         u8 *rss_config;
1049
1050         if (!ops->get_rxfh)
1051                 return -EOPNOTSUPP;
1052
1053         if (ops->get_rxfh_indir_size)
1054                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1055         if (ops->get_rxfh_key_size)
1056                 dev_key_size = ops->get_rxfh_key_size(dev);
1057
1058         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1059                 return -EFAULT;
1060         user_indir_size = rxfh.indir_size;
1061         user_key_size = rxfh.key_size;
1062
1063         /* Check that reserved fields are 0 for now */
1064         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1065                 return -EINVAL;
1066         /* Most drivers don't handle rss_context, check it's 0 as well */
1067         if (rxfh.rss_context && !ops->get_rxfh_context)
1068                 return -EOPNOTSUPP;
1069
1070         rxfh.indir_size = dev_indir_size;
1071         rxfh.key_size = dev_key_size;
1072         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1073                 return -EFAULT;
1074
1075         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1076             (user_key_size && (user_key_size != dev_key_size)))
1077                 return -EINVAL;
1078
1079         indir_bytes = user_indir_size * sizeof(indir[0]);
1080         total_size = indir_bytes + user_key_size;
1081         rss_config = kzalloc(total_size, GFP_USER);
1082         if (!rss_config)
1083                 return -ENOMEM;
1084
1085         if (user_indir_size)
1086                 indir = (u32 *)rss_config;
1087
1088         if (user_key_size)
1089                 hkey = rss_config + indir_bytes;
1090
1091         if (rxfh.rss_context)
1092                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1093                                                          &dev_hfunc,
1094                                                          rxfh.rss_context);
1095         else
1096                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1097         if (ret)
1098                 goto out;
1099
1100         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1101                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1102                 ret = -EFAULT;
1103         } else if (copy_to_user(useraddr +
1104                               offsetof(struct ethtool_rxfh, rss_config[0]),
1105                               rss_config, total_size)) {
1106                 ret = -EFAULT;
1107         }
1108 out:
1109         kfree(rss_config);
1110
1111         return ret;
1112 }
1113
1114 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1115                                                void __user *useraddr)
1116 {
1117         int ret;
1118         const struct ethtool_ops *ops = dev->ethtool_ops;
1119         struct ethtool_rxnfc rx_rings;
1120         struct ethtool_rxfh rxfh;
1121         u32 dev_indir_size = 0, dev_key_size = 0, i;
1122         u32 *indir = NULL, indir_bytes = 0;
1123         u8 *hkey = NULL;
1124         u8 *rss_config;
1125         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1126         bool delete = false;
1127
1128         if (!ops->get_rxnfc || !ops->set_rxfh)
1129                 return -EOPNOTSUPP;
1130
1131         if (ops->get_rxfh_indir_size)
1132                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1133         if (ops->get_rxfh_key_size)
1134                 dev_key_size = ops->get_rxfh_key_size(dev);
1135
1136         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1137                 return -EFAULT;
1138
1139         /* Check that reserved fields are 0 for now */
1140         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1141                 return -EINVAL;
1142         /* Most drivers don't handle rss_context, check it's 0 as well */
1143         if (rxfh.rss_context && !ops->set_rxfh_context)
1144                 return -EOPNOTSUPP;
1145
1146         /* If either indir, hash key or function is valid, proceed further.
1147          * Must request at least one change: indir size, hash key or function.
1148          */
1149         if ((rxfh.indir_size &&
1150              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1151              rxfh.indir_size != dev_indir_size) ||
1152             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1153             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1154              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1155                 return -EINVAL;
1156
1157         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1158                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1159
1160         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1161         if (!rss_config)
1162                 return -ENOMEM;
1163
1164         rx_rings.cmd = ETHTOOL_GRXRINGS;
1165         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1166         if (ret)
1167                 goto out;
1168
1169         /* rxfh.indir_size == 0 means reset the indir table to default (master
1170          * context) or delete the context (other RSS contexts).
1171          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1172          */
1173         if (rxfh.indir_size &&
1174             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1175                 indir = (u32 *)rss_config;
1176                 ret = ethtool_copy_validate_indir(indir,
1177                                                   useraddr + rss_cfg_offset,
1178                                                   &rx_rings,
1179                                                   rxfh.indir_size);
1180                 if (ret)
1181                         goto out;
1182         } else if (rxfh.indir_size == 0) {
1183                 if (rxfh.rss_context == 0) {
1184                         indir = (u32 *)rss_config;
1185                         for (i = 0; i < dev_indir_size; i++)
1186                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1187                 } else {
1188                         delete = true;
1189                 }
1190         }
1191
1192         if (rxfh.key_size) {
1193                 hkey = rss_config + indir_bytes;
1194                 if (copy_from_user(hkey,
1195                                    useraddr + rss_cfg_offset + indir_bytes,
1196                                    rxfh.key_size)) {
1197                         ret = -EFAULT;
1198                         goto out;
1199                 }
1200         }
1201
1202         if (rxfh.rss_context)
1203                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1204                                             &rxfh.rss_context, delete);
1205         else
1206                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1207         if (ret)
1208                 goto out;
1209
1210         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1211                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1212                 ret = -EFAULT;
1213
1214         if (!rxfh.rss_context) {
1215                 /* indicate whether rxfh was set to default */
1216                 if (rxfh.indir_size == 0)
1217                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1218                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1219                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1220         }
1221
1222 out:
1223         kfree(rss_config);
1224         return ret;
1225 }
1226
1227 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1228 {
1229         struct ethtool_regs regs;
1230         const struct ethtool_ops *ops = dev->ethtool_ops;
1231         void *regbuf;
1232         int reglen, ret;
1233
1234         if (!ops->get_regs || !ops->get_regs_len)
1235                 return -EOPNOTSUPP;
1236
1237         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1238                 return -EFAULT;
1239
1240         reglen = ops->get_regs_len(dev);
1241         if (reglen <= 0)
1242                 return reglen;
1243
1244         if (regs.len > reglen)
1245                 regs.len = reglen;
1246
1247         regbuf = vzalloc(reglen);
1248         if (!regbuf)
1249                 return -ENOMEM;
1250
1251         if (regs.len < reglen)
1252                 reglen = regs.len;
1253
1254         ops->get_regs(dev, &regs, regbuf);
1255
1256         ret = -EFAULT;
1257         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1258                 goto out;
1259         useraddr += offsetof(struct ethtool_regs, data);
1260         if (copy_to_user(useraddr, regbuf, reglen))
1261                 goto out;
1262         ret = 0;
1263
1264  out:
1265         vfree(regbuf);
1266         return ret;
1267 }
1268
1269 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1270 {
1271         struct ethtool_value reset;
1272         int ret;
1273
1274         if (!dev->ethtool_ops->reset)
1275                 return -EOPNOTSUPP;
1276
1277         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1278                 return -EFAULT;
1279
1280         ret = dev->ethtool_ops->reset(dev, &reset.data);
1281         if (ret)
1282                 return ret;
1283
1284         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1285                 return -EFAULT;
1286         return 0;
1287 }
1288
1289 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1290 {
1291         struct ethtool_wolinfo wol;
1292
1293         if (!dev->ethtool_ops->get_wol)
1294                 return -EOPNOTSUPP;
1295
1296         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1297         wol.cmd = ETHTOOL_GWOL;
1298         dev->ethtool_ops->get_wol(dev, &wol);
1299
1300         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1301                 return -EFAULT;
1302         return 0;
1303 }
1304
1305 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1306 {
1307         struct ethtool_wolinfo wol;
1308         int ret;
1309
1310         if (!dev->ethtool_ops->set_wol)
1311                 return -EOPNOTSUPP;
1312
1313         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1314                 return -EFAULT;
1315
1316         ret = dev->ethtool_ops->set_wol(dev, &wol);
1317         if (ret)
1318                 return ret;
1319
1320         dev->wol_enabled = !!wol.wolopts;
1321         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1322
1323         return 0;
1324 }
1325
1326 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1327 {
1328         struct ethtool_eee edata;
1329         int rc;
1330
1331         if (!dev->ethtool_ops->get_eee)
1332                 return -EOPNOTSUPP;
1333
1334         memset(&edata, 0, sizeof(struct ethtool_eee));
1335         edata.cmd = ETHTOOL_GEEE;
1336         rc = dev->ethtool_ops->get_eee(dev, &edata);
1337
1338         if (rc)
1339                 return rc;
1340
1341         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1342                 return -EFAULT;
1343
1344         return 0;
1345 }
1346
1347 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1348 {
1349         struct ethtool_eee edata;
1350
1351         if (!dev->ethtool_ops->set_eee)
1352                 return -EOPNOTSUPP;
1353
1354         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1355                 return -EFAULT;
1356
1357         return dev->ethtool_ops->set_eee(dev, &edata);
1358 }
1359
1360 static int ethtool_nway_reset(struct net_device *dev)
1361 {
1362         if (!dev->ethtool_ops->nway_reset)
1363                 return -EOPNOTSUPP;
1364
1365         return dev->ethtool_ops->nway_reset(dev);
1366 }
1367
1368 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1369 {
1370         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1371         int link = __ethtool_get_link(dev);
1372
1373         if (link < 0)
1374                 return link;
1375
1376         edata.data = link;
1377         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1378                 return -EFAULT;
1379         return 0;
1380 }
1381
1382 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1383                                   int (*getter)(struct net_device *,
1384                                                 struct ethtool_eeprom *, u8 *),
1385                                   u32 total_len)
1386 {
1387         struct ethtool_eeprom eeprom;
1388         void __user *userbuf = useraddr + sizeof(eeprom);
1389         u32 bytes_remaining;
1390         u8 *data;
1391         int ret = 0;
1392
1393         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1394                 return -EFAULT;
1395
1396         /* Check for wrap and zero */
1397         if (eeprom.offset + eeprom.len <= eeprom.offset)
1398                 return -EINVAL;
1399
1400         /* Check for exceeding total eeprom len */
1401         if (eeprom.offset + eeprom.len > total_len)
1402                 return -EINVAL;
1403
1404         data = kmalloc(PAGE_SIZE, GFP_USER);
1405         if (!data)
1406                 return -ENOMEM;
1407
1408         bytes_remaining = eeprom.len;
1409         while (bytes_remaining > 0) {
1410                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1411
1412                 ret = getter(dev, &eeprom, data);
1413                 if (ret)
1414                         break;
1415                 if (copy_to_user(userbuf, data, eeprom.len)) {
1416                         ret = -EFAULT;
1417                         break;
1418                 }
1419                 userbuf += eeprom.len;
1420                 eeprom.offset += eeprom.len;
1421                 bytes_remaining -= eeprom.len;
1422         }
1423
1424         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1425         eeprom.offset -= eeprom.len;
1426         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1427                 ret = -EFAULT;
1428
1429         kfree(data);
1430         return ret;
1431 }
1432
1433 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1434 {
1435         const struct ethtool_ops *ops = dev->ethtool_ops;
1436
1437         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1438             !ops->get_eeprom_len(dev))
1439                 return -EOPNOTSUPP;
1440
1441         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1442                                       ops->get_eeprom_len(dev));
1443 }
1444
1445 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1446 {
1447         struct ethtool_eeprom eeprom;
1448         const struct ethtool_ops *ops = dev->ethtool_ops;
1449         void __user *userbuf = useraddr + sizeof(eeprom);
1450         u32 bytes_remaining;
1451         u8 *data;
1452         int ret = 0;
1453
1454         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1455             !ops->get_eeprom_len(dev))
1456                 return -EOPNOTSUPP;
1457
1458         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1459                 return -EFAULT;
1460
1461         /* Check for wrap and zero */
1462         if (eeprom.offset + eeprom.len <= eeprom.offset)
1463                 return -EINVAL;
1464
1465         /* Check for exceeding total eeprom len */
1466         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1467                 return -EINVAL;
1468
1469         data = kmalloc(PAGE_SIZE, GFP_USER);
1470         if (!data)
1471                 return -ENOMEM;
1472
1473         bytes_remaining = eeprom.len;
1474         while (bytes_remaining > 0) {
1475                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1476
1477                 if (copy_from_user(data, userbuf, eeprom.len)) {
1478                         ret = -EFAULT;
1479                         break;
1480                 }
1481                 ret = ops->set_eeprom(dev, &eeprom, data);
1482                 if (ret)
1483                         break;
1484                 userbuf += eeprom.len;
1485                 eeprom.offset += eeprom.len;
1486                 bytes_remaining -= eeprom.len;
1487         }
1488
1489         kfree(data);
1490         return ret;
1491 }
1492
1493 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1494                                                    void __user *useraddr)
1495 {
1496         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1497
1498         if (!dev->ethtool_ops->get_coalesce)
1499                 return -EOPNOTSUPP;
1500
1501         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1502
1503         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1504                 return -EFAULT;
1505         return 0;
1506 }
1507
1508 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1509                                                    void __user *useraddr)
1510 {
1511         struct ethtool_coalesce coalesce;
1512
1513         if (!dev->ethtool_ops->set_coalesce)
1514                 return -EOPNOTSUPP;
1515
1516         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1517                 return -EFAULT;
1518
1519         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1520 }
1521
1522 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1523 {
1524         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1525
1526         if (!dev->ethtool_ops->get_ringparam)
1527                 return -EOPNOTSUPP;
1528
1529         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1530
1531         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1532                 return -EFAULT;
1533         return 0;
1534 }
1535
1536 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1537 {
1538         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1539
1540         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1541                 return -EOPNOTSUPP;
1542
1543         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1544                 return -EFAULT;
1545
1546         dev->ethtool_ops->get_ringparam(dev, &max);
1547
1548         /* ensure new ring parameters are within the maximums */
1549         if (ringparam.rx_pending > max.rx_max_pending ||
1550             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1551             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1552             ringparam.tx_pending > max.tx_max_pending)
1553                 return -EINVAL;
1554
1555         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1556 }
1557
1558 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1559                                                    void __user *useraddr)
1560 {
1561         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1562
1563         if (!dev->ethtool_ops->get_channels)
1564                 return -EOPNOTSUPP;
1565
1566         dev->ethtool_ops->get_channels(dev, &channels);
1567
1568         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1569                 return -EFAULT;
1570         return 0;
1571 }
1572
1573 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1574                                                    void __user *useraddr)
1575 {
1576         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1577         u16 from_channel, to_channel;
1578         u32 max_rx_in_use = 0;
1579         unsigned int i;
1580
1581         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1582                 return -EOPNOTSUPP;
1583
1584         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1585                 return -EFAULT;
1586
1587         dev->ethtool_ops->get_channels(dev, &curr);
1588
1589         /* ensure new counts are within the maximums */
1590         if (channels.rx_count > curr.max_rx ||
1591             channels.tx_count > curr.max_tx ||
1592             channels.combined_count > curr.max_combined ||
1593             channels.other_count > curr.max_other)
1594                 return -EINVAL;
1595
1596         /* ensure the new Rx count fits within the configured Rx flow
1597          * indirection table settings */
1598         if (netif_is_rxfh_configured(dev) &&
1599             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1600             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1601             return -EINVAL;
1602
1603         /* Disabling channels, query zero-copy AF_XDP sockets */
1604         from_channel = channels.combined_count +
1605                 min(channels.rx_count, channels.tx_count);
1606         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1607         for (i = from_channel; i < to_channel; i++)
1608                 if (xdp_get_umem_from_qid(dev, i))
1609                         return -EINVAL;
1610
1611         return dev->ethtool_ops->set_channels(dev, &channels);
1612 }
1613
1614 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1615 {
1616         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1617
1618         if (!dev->ethtool_ops->get_pauseparam)
1619                 return -EOPNOTSUPP;
1620
1621         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1622
1623         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1624                 return -EFAULT;
1625         return 0;
1626 }
1627
1628 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1629 {
1630         struct ethtool_pauseparam pauseparam;
1631
1632         if (!dev->ethtool_ops->set_pauseparam)
1633                 return -EOPNOTSUPP;
1634
1635         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1636                 return -EFAULT;
1637
1638         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1639 }
1640
1641 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1642 {
1643         struct ethtool_test test;
1644         const struct ethtool_ops *ops = dev->ethtool_ops;
1645         u64 *data;
1646         int ret, test_len;
1647
1648         if (!ops->self_test || !ops->get_sset_count)
1649                 return -EOPNOTSUPP;
1650
1651         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1652         if (test_len < 0)
1653                 return test_len;
1654         WARN_ON(test_len == 0);
1655
1656         if (copy_from_user(&test, useraddr, sizeof(test)))
1657                 return -EFAULT;
1658
1659         test.len = test_len;
1660         data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1661         if (!data)
1662                 return -ENOMEM;
1663
1664         ops->self_test(dev, &test, data);
1665
1666         ret = -EFAULT;
1667         if (copy_to_user(useraddr, &test, sizeof(test)))
1668                 goto out;
1669         useraddr += sizeof(test);
1670         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1671                 goto out;
1672         ret = 0;
1673
1674  out:
1675         kfree(data);
1676         return ret;
1677 }
1678
1679 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1680 {
1681         struct ethtool_gstrings gstrings;
1682         u8 *data;
1683         int ret;
1684
1685         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1686                 return -EFAULT;
1687
1688         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1689         if (ret < 0)
1690                 return ret;
1691         if (ret > S32_MAX / ETH_GSTRING_LEN)
1692                 return -ENOMEM;
1693         WARN_ON_ONCE(!ret);
1694
1695         gstrings.len = ret;
1696
1697         if (gstrings.len) {
1698                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1699                 if (!data)
1700                         return -ENOMEM;
1701
1702                 __ethtool_get_strings(dev, gstrings.string_set, data);
1703         } else {
1704                 data = NULL;
1705         }
1706
1707         ret = -EFAULT;
1708         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1709                 goto out;
1710         useraddr += sizeof(gstrings);
1711         if (gstrings.len &&
1712             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1713                 goto out;
1714         ret = 0;
1715
1716 out:
1717         vfree(data);
1718         return ret;
1719 }
1720
1721 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1722 {
1723         struct ethtool_value id;
1724         static bool busy;
1725         const struct ethtool_ops *ops = dev->ethtool_ops;
1726         int rc;
1727
1728         if (!ops->set_phys_id)
1729                 return -EOPNOTSUPP;
1730
1731         if (busy)
1732                 return -EBUSY;
1733
1734         if (copy_from_user(&id, useraddr, sizeof(id)))
1735                 return -EFAULT;
1736
1737         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1738         if (rc < 0)
1739                 return rc;
1740
1741         /* Drop the RTNL lock while waiting, but prevent reentry or
1742          * removal of the device.
1743          */
1744         busy = true;
1745         dev_hold(dev);
1746         rtnl_unlock();
1747
1748         if (rc == 0) {
1749                 /* Driver will handle this itself */
1750                 schedule_timeout_interruptible(
1751                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1752         } else {
1753                 /* Driver expects to be called at twice the frequency in rc */
1754                 int n = rc * 2, i, interval = HZ / n;
1755
1756                 /* Count down seconds */
1757                 do {
1758                         /* Count down iterations per second */
1759                         i = n;
1760                         do {
1761                                 rtnl_lock();
1762                                 rc = ops->set_phys_id(dev,
1763                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1764                                 rtnl_unlock();
1765                                 if (rc)
1766                                         break;
1767                                 schedule_timeout_interruptible(interval);
1768                         } while (!signal_pending(current) && --i != 0);
1769                 } while (!signal_pending(current) &&
1770                          (id.data == 0 || --id.data != 0));
1771         }
1772
1773         rtnl_lock();
1774         dev_put(dev);
1775         busy = false;
1776
1777         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1778         return rc;
1779 }
1780
1781 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1782 {
1783         struct ethtool_stats stats;
1784         const struct ethtool_ops *ops = dev->ethtool_ops;
1785         u64 *data;
1786         int ret, n_stats;
1787
1788         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1789                 return -EOPNOTSUPP;
1790
1791         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1792         if (n_stats < 0)
1793                 return n_stats;
1794         if (n_stats > S32_MAX / sizeof(u64))
1795                 return -ENOMEM;
1796         WARN_ON_ONCE(!n_stats);
1797         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1798                 return -EFAULT;
1799
1800         stats.n_stats = n_stats;
1801
1802         if (n_stats) {
1803                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1804                 if (!data)
1805                         return -ENOMEM;
1806                 ops->get_ethtool_stats(dev, &stats, data);
1807         } else {
1808                 data = NULL;
1809         }
1810
1811         ret = -EFAULT;
1812         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1813                 goto out;
1814         useraddr += sizeof(stats);
1815         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1816                 goto out;
1817         ret = 0;
1818
1819  out:
1820         vfree(data);
1821         return ret;
1822 }
1823
1824 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1825 {
1826         const struct ethtool_ops *ops = dev->ethtool_ops;
1827         struct phy_device *phydev = dev->phydev;
1828         struct ethtool_stats stats;
1829         u64 *data;
1830         int ret, n_stats;
1831
1832         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1833                 return -EOPNOTSUPP;
1834
1835         if (dev->phydev && !ops->get_ethtool_phy_stats)
1836                 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1837         else
1838                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1839         if (n_stats < 0)
1840                 return n_stats;
1841         if (n_stats > S32_MAX / sizeof(u64))
1842                 return -ENOMEM;
1843         WARN_ON_ONCE(!n_stats);
1844
1845         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1846                 return -EFAULT;
1847
1848         stats.n_stats = n_stats;
1849
1850         if (n_stats) {
1851                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1852                 if (!data)
1853                         return -ENOMEM;
1854
1855                 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1856                         ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1857                         if (ret < 0)
1858                                 goto out;
1859                 } else {
1860                         ops->get_ethtool_phy_stats(dev, &stats, data);
1861                 }
1862         } else {
1863                 data = NULL;
1864         }
1865
1866         ret = -EFAULT;
1867         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1868                 goto out;
1869         useraddr += sizeof(stats);
1870         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1871                 goto out;
1872         ret = 0;
1873
1874  out:
1875         vfree(data);
1876         return ret;
1877 }
1878
1879 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1880 {
1881         struct ethtool_perm_addr epaddr;
1882
1883         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1884                 return -EFAULT;
1885
1886         if (epaddr.size < dev->addr_len)
1887                 return -ETOOSMALL;
1888         epaddr.size = dev->addr_len;
1889
1890         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1891                 return -EFAULT;
1892         useraddr += sizeof(epaddr);
1893         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1894                 return -EFAULT;
1895         return 0;
1896 }
1897
1898 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1899                              u32 cmd, u32 (*actor)(struct net_device *))
1900 {
1901         struct ethtool_value edata = { .cmd = cmd };
1902
1903         if (!actor)
1904                 return -EOPNOTSUPP;
1905
1906         edata.data = actor(dev);
1907
1908         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1909                 return -EFAULT;
1910         return 0;
1911 }
1912
1913 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1914                              void (*actor)(struct net_device *, u32))
1915 {
1916         struct ethtool_value edata;
1917
1918         if (!actor)
1919                 return -EOPNOTSUPP;
1920
1921         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1922                 return -EFAULT;
1923
1924         actor(dev, edata.data);
1925         return 0;
1926 }
1927
1928 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1929                              int (*actor)(struct net_device *, u32))
1930 {
1931         struct ethtool_value edata;
1932
1933         if (!actor)
1934                 return -EOPNOTSUPP;
1935
1936         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1937                 return -EFAULT;
1938
1939         return actor(dev, edata.data);
1940 }
1941
1942 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1943                                                    char __user *useraddr)
1944 {
1945         struct ethtool_flash efl;
1946
1947         if (copy_from_user(&efl, useraddr, sizeof(efl)))
1948                 return -EFAULT;
1949         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1950
1951         if (!dev->ethtool_ops->flash_device)
1952                 return devlink_compat_flash_update(dev, efl.data);
1953
1954         return dev->ethtool_ops->flash_device(dev, &efl);
1955 }
1956
1957 static int ethtool_set_dump(struct net_device *dev,
1958                         void __user *useraddr)
1959 {
1960         struct ethtool_dump dump;
1961
1962         if (!dev->ethtool_ops->set_dump)
1963                 return -EOPNOTSUPP;
1964
1965         if (copy_from_user(&dump, useraddr, sizeof(dump)))
1966                 return -EFAULT;
1967
1968         return dev->ethtool_ops->set_dump(dev, &dump);
1969 }
1970
1971 static int ethtool_get_dump_flag(struct net_device *dev,
1972                                 void __user *useraddr)
1973 {
1974         int ret;
1975         struct ethtool_dump dump;
1976         const struct ethtool_ops *ops = dev->ethtool_ops;
1977
1978         if (!ops->get_dump_flag)
1979                 return -EOPNOTSUPP;
1980
1981         if (copy_from_user(&dump, useraddr, sizeof(dump)))
1982                 return -EFAULT;
1983
1984         ret = ops->get_dump_flag(dev, &dump);
1985         if (ret)
1986                 return ret;
1987
1988         if (copy_to_user(useraddr, &dump, sizeof(dump)))
1989                 return -EFAULT;
1990         return 0;
1991 }
1992
1993 static int ethtool_get_dump_data(struct net_device *dev,
1994                                 void __user *useraddr)
1995 {
1996         int ret;
1997         __u32 len;
1998         struct ethtool_dump dump, tmp;
1999         const struct ethtool_ops *ops = dev->ethtool_ops;
2000         void *data = NULL;
2001
2002         if (!ops->get_dump_data || !ops->get_dump_flag)
2003                 return -EOPNOTSUPP;
2004
2005         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2006                 return -EFAULT;
2007
2008         memset(&tmp, 0, sizeof(tmp));
2009         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2010         ret = ops->get_dump_flag(dev, &tmp);
2011         if (ret)
2012                 return ret;
2013
2014         len = min(tmp.len, dump.len);
2015         if (!len)
2016                 return -EFAULT;
2017
2018         /* Don't ever let the driver think there's more space available
2019          * than it requested with .get_dump_flag().
2020          */
2021         dump.len = len;
2022
2023         /* Always allocate enough space to hold the whole thing so that the
2024          * driver does not need to check the length and bother with partial
2025          * dumping.
2026          */
2027         data = vzalloc(tmp.len);
2028         if (!data)
2029                 return -ENOMEM;
2030         ret = ops->get_dump_data(dev, &dump, data);
2031         if (ret)
2032                 goto out;
2033
2034         /* There are two sane possibilities:
2035          * 1. The driver's .get_dump_data() does not touch dump.len.
2036          * 2. Or it may set dump.len to how much it really writes, which
2037          *    should be tmp.len (or len if it can do a partial dump).
2038          * In any case respond to userspace with the actual length of data
2039          * it's receiving.
2040          */
2041         WARN_ON(dump.len != len && dump.len != tmp.len);
2042         dump.len = len;
2043
2044         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2045                 ret = -EFAULT;
2046                 goto out;
2047         }
2048         useraddr += offsetof(struct ethtool_dump, data);
2049         if (copy_to_user(useraddr, data, len))
2050                 ret = -EFAULT;
2051 out:
2052         vfree(data);
2053         return ret;
2054 }
2055
2056 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2057 {
2058         int err = 0;
2059         struct ethtool_ts_info info;
2060         const struct ethtool_ops *ops = dev->ethtool_ops;
2061         struct phy_device *phydev = dev->phydev;
2062
2063         memset(&info, 0, sizeof(info));
2064         info.cmd = ETHTOOL_GET_TS_INFO;
2065
2066         if (phy_has_tsinfo(phydev)) {
2067                 err = phy_ts_info(phydev, &info);
2068         } else if (ops->get_ts_info) {
2069                 err = ops->get_ts_info(dev, &info);
2070         } else {
2071                 info.so_timestamping =
2072                         SOF_TIMESTAMPING_RX_SOFTWARE |
2073                         SOF_TIMESTAMPING_SOFTWARE;
2074                 info.phc_index = -1;
2075         }
2076
2077         if (err)
2078                 return err;
2079
2080         if (copy_to_user(useraddr, &info, sizeof(info)))
2081                 err = -EFAULT;
2082
2083         return err;
2084 }
2085
2086 static int __ethtool_get_module_info(struct net_device *dev,
2087                                      struct ethtool_modinfo *modinfo)
2088 {
2089         const struct ethtool_ops *ops = dev->ethtool_ops;
2090         struct phy_device *phydev = dev->phydev;
2091
2092         if (dev->sfp_bus)
2093                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2094
2095         if (phydev && phydev->drv && phydev->drv->module_info)
2096                 return phydev->drv->module_info(phydev, modinfo);
2097
2098         if (ops->get_module_info)
2099                 return ops->get_module_info(dev, modinfo);
2100
2101         return -EOPNOTSUPP;
2102 }
2103
2104 static int ethtool_get_module_info(struct net_device *dev,
2105                                    void __user *useraddr)
2106 {
2107         int ret;
2108         struct ethtool_modinfo modinfo;
2109
2110         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2111                 return -EFAULT;
2112
2113         ret = __ethtool_get_module_info(dev, &modinfo);
2114         if (ret)
2115                 return ret;
2116
2117         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2118                 return -EFAULT;
2119
2120         return 0;
2121 }
2122
2123 static int __ethtool_get_module_eeprom(struct net_device *dev,
2124                                        struct ethtool_eeprom *ee, u8 *data)
2125 {
2126         const struct ethtool_ops *ops = dev->ethtool_ops;
2127         struct phy_device *phydev = dev->phydev;
2128
2129         if (dev->sfp_bus)
2130                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2131
2132         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2133                 return phydev->drv->module_eeprom(phydev, ee, data);
2134
2135         if (ops->get_module_eeprom)
2136                 return ops->get_module_eeprom(dev, ee, data);
2137
2138         return -EOPNOTSUPP;
2139 }
2140
2141 static int ethtool_get_module_eeprom(struct net_device *dev,
2142                                      void __user *useraddr)
2143 {
2144         int ret;
2145         struct ethtool_modinfo modinfo;
2146
2147         ret = __ethtool_get_module_info(dev, &modinfo);
2148         if (ret)
2149                 return ret;
2150
2151         return ethtool_get_any_eeprom(dev, useraddr,
2152                                       __ethtool_get_module_eeprom,
2153                                       modinfo.eeprom_len);
2154 }
2155
2156 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2157 {
2158         switch (tuna->id) {
2159         case ETHTOOL_RX_COPYBREAK:
2160         case ETHTOOL_TX_COPYBREAK:
2161                 if (tuna->len != sizeof(u32) ||
2162                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2163                         return -EINVAL;
2164                 break;
2165         case ETHTOOL_PFC_PREVENTION_TOUT:
2166                 if (tuna->len != sizeof(u16) ||
2167                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2168                         return -EINVAL;
2169                 break;
2170         default:
2171                 return -EINVAL;
2172         }
2173
2174         return 0;
2175 }
2176
2177 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2178 {
2179         int ret;
2180         struct ethtool_tunable tuna;
2181         const struct ethtool_ops *ops = dev->ethtool_ops;
2182         void *data;
2183
2184         if (!ops->get_tunable)
2185                 return -EOPNOTSUPP;
2186         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2187                 return -EFAULT;
2188         ret = ethtool_tunable_valid(&tuna);
2189         if (ret)
2190                 return ret;
2191         data = kmalloc(tuna.len, GFP_USER);
2192         if (!data)
2193                 return -ENOMEM;
2194         ret = ops->get_tunable(dev, &tuna, data);
2195         if (ret)
2196                 goto out;
2197         useraddr += sizeof(tuna);
2198         ret = -EFAULT;
2199         if (copy_to_user(useraddr, data, tuna.len))
2200                 goto out;
2201         ret = 0;
2202
2203 out:
2204         kfree(data);
2205         return ret;
2206 }
2207
2208 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2209 {
2210         int ret;
2211         struct ethtool_tunable tuna;
2212         const struct ethtool_ops *ops = dev->ethtool_ops;
2213         void *data;
2214
2215         if (!ops->set_tunable)
2216                 return -EOPNOTSUPP;
2217         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2218                 return -EFAULT;
2219         ret = ethtool_tunable_valid(&tuna);
2220         if (ret)
2221                 return ret;
2222         useraddr += sizeof(tuna);
2223         data = memdup_user(useraddr, tuna.len);
2224         if (IS_ERR(data))
2225                 return PTR_ERR(data);
2226         ret = ops->set_tunable(dev, &tuna, data);
2227
2228         kfree(data);
2229         return ret;
2230 }
2231
2232 static noinline_for_stack int
2233 ethtool_get_per_queue_coalesce(struct net_device *dev,
2234                                void __user *useraddr,
2235                                struct ethtool_per_queue_op *per_queue_opt)
2236 {
2237         u32 bit;
2238         int ret;
2239         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2240
2241         if (!dev->ethtool_ops->get_per_queue_coalesce)
2242                 return -EOPNOTSUPP;
2243
2244         useraddr += sizeof(*per_queue_opt);
2245
2246         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2247                           MAX_NUM_QUEUE);
2248
2249         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2250                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2251
2252                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2253                 if (ret != 0)
2254                         return ret;
2255                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2256                         return -EFAULT;
2257                 useraddr += sizeof(coalesce);
2258         }
2259
2260         return 0;
2261 }
2262
2263 static noinline_for_stack int
2264 ethtool_set_per_queue_coalesce(struct net_device *dev,
2265                                void __user *useraddr,
2266                                struct ethtool_per_queue_op *per_queue_opt)
2267 {
2268         u32 bit;
2269         int i, ret = 0;
2270         int n_queue;
2271         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2272         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2273
2274         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2275             (!dev->ethtool_ops->get_per_queue_coalesce))
2276                 return -EOPNOTSUPP;
2277
2278         useraddr += sizeof(*per_queue_opt);
2279
2280         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2281         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2282         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2283         if (!backup)
2284                 return -ENOMEM;
2285
2286         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2287                 struct ethtool_coalesce coalesce;
2288
2289                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2290                 if (ret != 0)
2291                         goto roll_back;
2292
2293                 tmp++;
2294
2295                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2296                         ret = -EFAULT;
2297                         goto roll_back;
2298                 }
2299
2300                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2301                 if (ret != 0)
2302                         goto roll_back;
2303
2304                 useraddr += sizeof(coalesce);
2305         }
2306
2307 roll_back:
2308         if (ret != 0) {
2309                 tmp = backup;
2310                 for_each_set_bit(i, queue_mask, bit) {
2311                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2312                         tmp++;
2313                 }
2314         }
2315         kfree(backup);
2316
2317         return ret;
2318 }
2319
2320 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2321                                  void __user *useraddr, u32 sub_cmd)
2322 {
2323         struct ethtool_per_queue_op per_queue_opt;
2324
2325         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2326                 return -EFAULT;
2327
2328         if (per_queue_opt.sub_command != sub_cmd)
2329                 return -EINVAL;
2330
2331         switch (per_queue_opt.sub_command) {
2332         case ETHTOOL_GCOALESCE:
2333                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2334         case ETHTOOL_SCOALESCE:
2335                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2336         default:
2337                 return -EOPNOTSUPP;
2338         };
2339 }
2340
2341 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2342 {
2343         switch (tuna->id) {
2344         case ETHTOOL_PHY_DOWNSHIFT:
2345         case ETHTOOL_PHY_FAST_LINK_DOWN:
2346                 if (tuna->len != sizeof(u8) ||
2347                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2348                         return -EINVAL;
2349                 break;
2350         case ETHTOOL_PHY_EDPD:
2351                 if (tuna->len != sizeof(u16) ||
2352                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2353                         return -EINVAL;
2354                 break;
2355         default:
2356                 return -EINVAL;
2357         }
2358
2359         return 0;
2360 }
2361
2362 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2363 {
2364         int ret;
2365         struct ethtool_tunable tuna;
2366         struct phy_device *phydev = dev->phydev;
2367         void *data;
2368
2369         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2370                 return -EOPNOTSUPP;
2371
2372         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2373                 return -EFAULT;
2374         ret = ethtool_phy_tunable_valid(&tuna);
2375         if (ret)
2376                 return ret;
2377         data = kmalloc(tuna.len, GFP_USER);
2378         if (!data)
2379                 return -ENOMEM;
2380         mutex_lock(&phydev->lock);
2381         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2382         mutex_unlock(&phydev->lock);
2383         if (ret)
2384                 goto out;
2385         useraddr += sizeof(tuna);
2386         ret = -EFAULT;
2387         if (copy_to_user(useraddr, data, tuna.len))
2388                 goto out;
2389         ret = 0;
2390
2391 out:
2392         kfree(data);
2393         return ret;
2394 }
2395
2396 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2397 {
2398         int ret;
2399         struct ethtool_tunable tuna;
2400         struct phy_device *phydev = dev->phydev;
2401         void *data;
2402
2403         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2404                 return -EOPNOTSUPP;
2405         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2406                 return -EFAULT;
2407         ret = ethtool_phy_tunable_valid(&tuna);
2408         if (ret)
2409                 return ret;
2410         useraddr += sizeof(tuna);
2411         data = memdup_user(useraddr, tuna.len);
2412         if (IS_ERR(data))
2413                 return PTR_ERR(data);
2414         mutex_lock(&phydev->lock);
2415         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2416         mutex_unlock(&phydev->lock);
2417
2418         kfree(data);
2419         return ret;
2420 }
2421
2422 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2423 {
2424         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2425         int rc;
2426
2427         if (!dev->ethtool_ops->get_fecparam)
2428                 return -EOPNOTSUPP;
2429
2430         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2431         if (rc)
2432                 return rc;
2433
2434         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2435                 return -EFAULT;
2436         return 0;
2437 }
2438
2439 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2440 {
2441         struct ethtool_fecparam fecparam;
2442
2443         if (!dev->ethtool_ops->set_fecparam)
2444                 return -EOPNOTSUPP;
2445
2446         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2447                 return -EFAULT;
2448
2449         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2450 }
2451
2452 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2453
2454 int dev_ethtool(struct net *net, struct ifreq *ifr)
2455 {
2456         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2457         void __user *useraddr = ifr->ifr_data;
2458         u32 ethcmd, sub_cmd;
2459         int rc;
2460         netdev_features_t old_features;
2461
2462         if (!dev || !netif_device_present(dev))
2463                 return -ENODEV;
2464
2465         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2466                 return -EFAULT;
2467
2468         if (ethcmd == ETHTOOL_PERQUEUE) {
2469                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2470                         return -EFAULT;
2471         } else {
2472                 sub_cmd = ethcmd;
2473         }
2474         /* Allow some commands to be done by anyone */
2475         switch (sub_cmd) {
2476         case ETHTOOL_GSET:
2477         case ETHTOOL_GDRVINFO:
2478         case ETHTOOL_GMSGLVL:
2479         case ETHTOOL_GLINK:
2480         case ETHTOOL_GCOALESCE:
2481         case ETHTOOL_GRINGPARAM:
2482         case ETHTOOL_GPAUSEPARAM:
2483         case ETHTOOL_GRXCSUM:
2484         case ETHTOOL_GTXCSUM:
2485         case ETHTOOL_GSG:
2486         case ETHTOOL_GSSET_INFO:
2487         case ETHTOOL_GSTRINGS:
2488         case ETHTOOL_GSTATS:
2489         case ETHTOOL_GPHYSTATS:
2490         case ETHTOOL_GTSO:
2491         case ETHTOOL_GPERMADDR:
2492         case ETHTOOL_GUFO:
2493         case ETHTOOL_GGSO:
2494         case ETHTOOL_GGRO:
2495         case ETHTOOL_GFLAGS:
2496         case ETHTOOL_GPFLAGS:
2497         case ETHTOOL_GRXFH:
2498         case ETHTOOL_GRXRINGS:
2499         case ETHTOOL_GRXCLSRLCNT:
2500         case ETHTOOL_GRXCLSRULE:
2501         case ETHTOOL_GRXCLSRLALL:
2502         case ETHTOOL_GRXFHINDIR:
2503         case ETHTOOL_GRSSH:
2504         case ETHTOOL_GFEATURES:
2505         case ETHTOOL_GCHANNELS:
2506         case ETHTOOL_GET_TS_INFO:
2507         case ETHTOOL_GEEE:
2508         case ETHTOOL_GTUNABLE:
2509         case ETHTOOL_PHY_GTUNABLE:
2510         case ETHTOOL_GLINKSETTINGS:
2511         case ETHTOOL_GFECPARAM:
2512                 break;
2513         default:
2514                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2515                         return -EPERM;
2516         }
2517
2518         if (dev->ethtool_ops->begin) {
2519                 rc = dev->ethtool_ops->begin(dev);
2520                 if (rc  < 0)
2521                         return rc;
2522         }
2523         old_features = dev->features;
2524
2525         switch (ethcmd) {
2526         case ETHTOOL_GSET:
2527                 rc = ethtool_get_settings(dev, useraddr);
2528                 break;
2529         case ETHTOOL_SSET:
2530                 rc = ethtool_set_settings(dev, useraddr);
2531                 break;
2532         case ETHTOOL_GDRVINFO:
2533                 rc = ethtool_get_drvinfo(dev, useraddr);
2534                 break;
2535         case ETHTOOL_GREGS:
2536                 rc = ethtool_get_regs(dev, useraddr);
2537                 break;
2538         case ETHTOOL_GWOL:
2539                 rc = ethtool_get_wol(dev, useraddr);
2540                 break;
2541         case ETHTOOL_SWOL:
2542                 rc = ethtool_set_wol(dev, useraddr);
2543                 break;
2544         case ETHTOOL_GMSGLVL:
2545                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2546                                        dev->ethtool_ops->get_msglevel);
2547                 break;
2548         case ETHTOOL_SMSGLVL:
2549                 rc = ethtool_set_value_void(dev, useraddr,
2550                                        dev->ethtool_ops->set_msglevel);
2551                 if (!rc)
2552                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2553                 break;
2554         case ETHTOOL_GEEE:
2555                 rc = ethtool_get_eee(dev, useraddr);
2556                 break;
2557         case ETHTOOL_SEEE:
2558                 rc = ethtool_set_eee(dev, useraddr);
2559                 break;
2560         case ETHTOOL_NWAY_RST:
2561                 rc = ethtool_nway_reset(dev);
2562                 break;
2563         case ETHTOOL_GLINK:
2564                 rc = ethtool_get_link(dev, useraddr);
2565                 break;
2566         case ETHTOOL_GEEPROM:
2567                 rc = ethtool_get_eeprom(dev, useraddr);
2568                 break;
2569         case ETHTOOL_SEEPROM:
2570                 rc = ethtool_set_eeprom(dev, useraddr);
2571                 break;
2572         case ETHTOOL_GCOALESCE:
2573                 rc = ethtool_get_coalesce(dev, useraddr);
2574                 break;
2575         case ETHTOOL_SCOALESCE:
2576                 rc = ethtool_set_coalesce(dev, useraddr);
2577                 break;
2578         case ETHTOOL_GRINGPARAM:
2579                 rc = ethtool_get_ringparam(dev, useraddr);
2580                 break;
2581         case ETHTOOL_SRINGPARAM:
2582                 rc = ethtool_set_ringparam(dev, useraddr);
2583                 break;
2584         case ETHTOOL_GPAUSEPARAM:
2585                 rc = ethtool_get_pauseparam(dev, useraddr);
2586                 break;
2587         case ETHTOOL_SPAUSEPARAM:
2588                 rc = ethtool_set_pauseparam(dev, useraddr);
2589                 break;
2590         case ETHTOOL_TEST:
2591                 rc = ethtool_self_test(dev, useraddr);
2592                 break;
2593         case ETHTOOL_GSTRINGS:
2594                 rc = ethtool_get_strings(dev, useraddr);
2595                 break;
2596         case ETHTOOL_PHYS_ID:
2597                 rc = ethtool_phys_id(dev, useraddr);
2598                 break;
2599         case ETHTOOL_GSTATS:
2600                 rc = ethtool_get_stats(dev, useraddr);
2601                 break;
2602         case ETHTOOL_GPERMADDR:
2603                 rc = ethtool_get_perm_addr(dev, useraddr);
2604                 break;
2605         case ETHTOOL_GFLAGS:
2606                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2607                                         __ethtool_get_flags);
2608                 break;
2609         case ETHTOOL_SFLAGS:
2610                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2611                 break;
2612         case ETHTOOL_GPFLAGS:
2613                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2614                                        dev->ethtool_ops->get_priv_flags);
2615                 break;
2616         case ETHTOOL_SPFLAGS:
2617                 rc = ethtool_set_value(dev, useraddr,
2618                                        dev->ethtool_ops->set_priv_flags);
2619                 break;
2620         case ETHTOOL_GRXFH:
2621         case ETHTOOL_GRXRINGS:
2622         case ETHTOOL_GRXCLSRLCNT:
2623         case ETHTOOL_GRXCLSRULE:
2624         case ETHTOOL_GRXCLSRLALL:
2625                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2626                 break;
2627         case ETHTOOL_SRXFH:
2628         case ETHTOOL_SRXCLSRLDEL:
2629         case ETHTOOL_SRXCLSRLINS:
2630                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2631                 break;
2632         case ETHTOOL_FLASHDEV:
2633                 rc = ethtool_flash_device(dev, useraddr);
2634                 break;
2635         case ETHTOOL_RESET:
2636                 rc = ethtool_reset(dev, useraddr);
2637                 break;
2638         case ETHTOOL_GSSET_INFO:
2639                 rc = ethtool_get_sset_info(dev, useraddr);
2640                 break;
2641         case ETHTOOL_GRXFHINDIR:
2642                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2643                 break;
2644         case ETHTOOL_SRXFHINDIR:
2645                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2646                 break;
2647         case ETHTOOL_GRSSH:
2648                 rc = ethtool_get_rxfh(dev, useraddr);
2649                 break;
2650         case ETHTOOL_SRSSH:
2651                 rc = ethtool_set_rxfh(dev, useraddr);
2652                 break;
2653         case ETHTOOL_GFEATURES:
2654                 rc = ethtool_get_features(dev, useraddr);
2655                 break;
2656         case ETHTOOL_SFEATURES:
2657                 rc = ethtool_set_features(dev, useraddr);
2658                 break;
2659         case ETHTOOL_GTXCSUM:
2660         case ETHTOOL_GRXCSUM:
2661         case ETHTOOL_GSG:
2662         case ETHTOOL_GTSO:
2663         case ETHTOOL_GGSO:
2664         case ETHTOOL_GGRO:
2665                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2666                 break;
2667         case ETHTOOL_STXCSUM:
2668         case ETHTOOL_SRXCSUM:
2669         case ETHTOOL_SSG:
2670         case ETHTOOL_STSO:
2671         case ETHTOOL_SGSO:
2672         case ETHTOOL_SGRO:
2673                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2674                 break;
2675         case ETHTOOL_GCHANNELS:
2676                 rc = ethtool_get_channels(dev, useraddr);
2677                 break;
2678         case ETHTOOL_SCHANNELS:
2679                 rc = ethtool_set_channels(dev, useraddr);
2680                 break;
2681         case ETHTOOL_SET_DUMP:
2682                 rc = ethtool_set_dump(dev, useraddr);
2683                 break;
2684         case ETHTOOL_GET_DUMP_FLAG:
2685                 rc = ethtool_get_dump_flag(dev, useraddr);
2686                 break;
2687         case ETHTOOL_GET_DUMP_DATA:
2688                 rc = ethtool_get_dump_data(dev, useraddr);
2689                 break;
2690         case ETHTOOL_GET_TS_INFO:
2691                 rc = ethtool_get_ts_info(dev, useraddr);
2692                 break;
2693         case ETHTOOL_GMODULEINFO:
2694                 rc = ethtool_get_module_info(dev, useraddr);
2695                 break;
2696         case ETHTOOL_GMODULEEEPROM:
2697                 rc = ethtool_get_module_eeprom(dev, useraddr);
2698                 break;
2699         case ETHTOOL_GTUNABLE:
2700                 rc = ethtool_get_tunable(dev, useraddr);
2701                 break;
2702         case ETHTOOL_STUNABLE:
2703                 rc = ethtool_set_tunable(dev, useraddr);
2704                 break;
2705         case ETHTOOL_GPHYSTATS:
2706                 rc = ethtool_get_phy_stats(dev, useraddr);
2707                 break;
2708         case ETHTOOL_PERQUEUE:
2709                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2710                 break;
2711         case ETHTOOL_GLINKSETTINGS:
2712                 rc = ethtool_get_link_ksettings(dev, useraddr);
2713                 break;
2714         case ETHTOOL_SLINKSETTINGS:
2715                 rc = ethtool_set_link_ksettings(dev, useraddr);
2716                 break;
2717         case ETHTOOL_PHY_GTUNABLE:
2718                 rc = get_phy_tunable(dev, useraddr);
2719                 break;
2720         case ETHTOOL_PHY_STUNABLE:
2721                 rc = set_phy_tunable(dev, useraddr);
2722                 break;
2723         case ETHTOOL_GFECPARAM:
2724                 rc = ethtool_get_fecparam(dev, useraddr);
2725                 break;
2726         case ETHTOOL_SFECPARAM:
2727                 rc = ethtool_set_fecparam(dev, useraddr);
2728                 break;
2729         default:
2730                 rc = -EOPNOTSUPP;
2731         }
2732
2733         if (dev->ethtool_ops->complete)
2734                 dev->ethtool_ops->complete(dev);
2735
2736         if (old_features != dev->features)
2737                 netdev_features_change(dev);
2738
2739         return rc;
2740 }
2741
2742 struct ethtool_rx_flow_key {
2743         struct flow_dissector_key_basic                 basic;
2744         union {
2745                 struct flow_dissector_key_ipv4_addrs    ipv4;
2746                 struct flow_dissector_key_ipv6_addrs    ipv6;
2747         };
2748         struct flow_dissector_key_ports                 tp;
2749         struct flow_dissector_key_ip                    ip;
2750         struct flow_dissector_key_vlan                  vlan;
2751         struct flow_dissector_key_eth_addrs             eth_addrs;
2752 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2753
2754 struct ethtool_rx_flow_match {
2755         struct flow_dissector           dissector;
2756         struct ethtool_rx_flow_key      key;
2757         struct ethtool_rx_flow_key      mask;
2758 };
2759
2760 struct ethtool_rx_flow_rule *
2761 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2762 {
2763         const struct ethtool_rx_flow_spec *fs = input->fs;
2764         static struct in6_addr zero_addr = {};
2765         struct ethtool_rx_flow_match *match;
2766         struct ethtool_rx_flow_rule *flow;
2767         struct flow_action_entry *act;
2768
2769         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2770                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2771         if (!flow)
2772                 return ERR_PTR(-ENOMEM);
2773
2774         /* ethtool_rx supports only one single action per rule. */
2775         flow->rule = flow_rule_alloc(1);
2776         if (!flow->rule) {
2777                 kfree(flow);
2778                 return ERR_PTR(-ENOMEM);
2779         }
2780
2781         match = (struct ethtool_rx_flow_match *)flow->priv;
2782         flow->rule->match.dissector     = &match->dissector;
2783         flow->rule->match.mask          = &match->mask;
2784         flow->rule->match.key           = &match->key;
2785
2786         match->mask.basic.n_proto = htons(0xffff);
2787
2788         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2789         case ETHER_FLOW: {
2790                 const struct ethhdr *ether_spec, *ether_m_spec;
2791
2792                 ether_spec = &fs->h_u.ether_spec;
2793                 ether_m_spec = &fs->m_u.ether_spec;
2794
2795                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
2796                         ether_addr_copy(match->key.eth_addrs.src,
2797                                         ether_spec->h_source);
2798                         ether_addr_copy(match->mask.eth_addrs.src,
2799                                         ether_m_spec->h_source);
2800                 }
2801                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
2802                         ether_addr_copy(match->key.eth_addrs.dst,
2803                                         ether_spec->h_dest);
2804                         ether_addr_copy(match->mask.eth_addrs.dst,
2805                                         ether_m_spec->h_dest);
2806                 }
2807                 if (ether_m_spec->h_proto) {
2808                         match->key.basic.n_proto = ether_spec->h_proto;
2809                         match->mask.basic.n_proto = ether_m_spec->h_proto;
2810                 }
2811                 }
2812                 break;
2813         case TCP_V4_FLOW:
2814         case UDP_V4_FLOW: {
2815                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2816
2817                 match->key.basic.n_proto = htons(ETH_P_IP);
2818
2819                 v4_spec = &fs->h_u.tcp_ip4_spec;
2820                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2821
2822                 if (v4_m_spec->ip4src) {
2823                         match->key.ipv4.src = v4_spec->ip4src;
2824                         match->mask.ipv4.src = v4_m_spec->ip4src;
2825                 }
2826                 if (v4_m_spec->ip4dst) {
2827                         match->key.ipv4.dst = v4_spec->ip4dst;
2828                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
2829                 }
2830                 if (v4_m_spec->ip4src ||
2831                     v4_m_spec->ip4dst) {
2832                         match->dissector.used_keys |=
2833                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2834                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2835                                 offsetof(struct ethtool_rx_flow_key, ipv4);
2836                 }
2837                 if (v4_m_spec->psrc) {
2838                         match->key.tp.src = v4_spec->psrc;
2839                         match->mask.tp.src = v4_m_spec->psrc;
2840                 }
2841                 if (v4_m_spec->pdst) {
2842                         match->key.tp.dst = v4_spec->pdst;
2843                         match->mask.tp.dst = v4_m_spec->pdst;
2844                 }
2845                 if (v4_m_spec->psrc ||
2846                     v4_m_spec->pdst) {
2847                         match->dissector.used_keys |=
2848                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2849                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2850                                 offsetof(struct ethtool_rx_flow_key, tp);
2851                 }
2852                 if (v4_m_spec->tos) {
2853                         match->key.ip.tos = v4_spec->tos;
2854                         match->mask.ip.tos = v4_m_spec->tos;
2855                         match->dissector.used_keys |=
2856                                 BIT(FLOW_DISSECTOR_KEY_IP);
2857                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2858                                 offsetof(struct ethtool_rx_flow_key, ip);
2859                 }
2860                 }
2861                 break;
2862         case TCP_V6_FLOW:
2863         case UDP_V6_FLOW: {
2864                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2865
2866                 match->key.basic.n_proto = htons(ETH_P_IPV6);
2867
2868                 v6_spec = &fs->h_u.tcp_ip6_spec;
2869                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2870                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2871                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2872                                sizeof(match->key.ipv6.src));
2873                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2874                                sizeof(match->mask.ipv6.src));
2875                 }
2876                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2877                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2878                                sizeof(match->key.ipv6.dst));
2879                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2880                                sizeof(match->mask.ipv6.dst));
2881                 }
2882                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2883                     memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2884                         match->dissector.used_keys |=
2885                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2886                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2887                                 offsetof(struct ethtool_rx_flow_key, ipv6);
2888                 }
2889                 if (v6_m_spec->psrc) {
2890                         match->key.tp.src = v6_spec->psrc;
2891                         match->mask.tp.src = v6_m_spec->psrc;
2892                 }
2893                 if (v6_m_spec->pdst) {
2894                         match->key.tp.dst = v6_spec->pdst;
2895                         match->mask.tp.dst = v6_m_spec->pdst;
2896                 }
2897                 if (v6_m_spec->psrc ||
2898                     v6_m_spec->pdst) {
2899                         match->dissector.used_keys |=
2900                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2901                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2902                                 offsetof(struct ethtool_rx_flow_key, tp);
2903                 }
2904                 if (v6_m_spec->tclass) {
2905                         match->key.ip.tos = v6_spec->tclass;
2906                         match->mask.ip.tos = v6_m_spec->tclass;
2907                         match->dissector.used_keys |=
2908                                 BIT(FLOW_DISSECTOR_KEY_IP);
2909                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2910                                 offsetof(struct ethtool_rx_flow_key, ip);
2911                 }
2912                 }
2913                 break;
2914         default:
2915                 ethtool_rx_flow_rule_destroy(flow);
2916                 return ERR_PTR(-EINVAL);
2917         }
2918
2919         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2920         case TCP_V4_FLOW:
2921         case TCP_V6_FLOW:
2922                 match->key.basic.ip_proto = IPPROTO_TCP;
2923                 break;
2924         case UDP_V4_FLOW:
2925         case UDP_V6_FLOW:
2926                 match->key.basic.ip_proto = IPPROTO_UDP;
2927                 break;
2928         }
2929         match->mask.basic.ip_proto = 0xff;
2930
2931         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
2932         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
2933                 offsetof(struct ethtool_rx_flow_key, basic);
2934
2935         if (fs->flow_type & FLOW_EXT) {
2936                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
2937                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
2938
2939                 if (ext_m_spec->vlan_etype) {
2940                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
2941                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
2942                 }
2943
2944                 if (ext_m_spec->vlan_tci) {
2945                         match->key.vlan.vlan_id =
2946                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
2947                         match->mask.vlan.vlan_id =
2948                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
2949
2950                         match->key.vlan.vlan_dei =
2951                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
2952                         match->mask.vlan.vlan_dei =
2953                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
2954
2955                         match->key.vlan.vlan_priority =
2956                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
2957                         match->mask.vlan.vlan_priority =
2958                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
2959                 }
2960
2961                 if (ext_m_spec->vlan_etype ||
2962                     ext_m_spec->vlan_tci) {
2963                         match->dissector.used_keys |=
2964                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
2965                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
2966                                 offsetof(struct ethtool_rx_flow_key, vlan);
2967                 }
2968         }
2969         if (fs->flow_type & FLOW_MAC_EXT) {
2970                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
2971                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
2972
2973                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
2974                        ETH_ALEN);
2975                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
2976                        ETH_ALEN);
2977
2978                 match->dissector.used_keys |=
2979                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
2980                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
2981                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
2982         }
2983
2984         act = &flow->rule->action.entries[0];
2985         switch (fs->ring_cookie) {
2986         case RX_CLS_FLOW_DISC:
2987                 act->id = FLOW_ACTION_DROP;
2988                 break;
2989         case RX_CLS_FLOW_WAKE:
2990                 act->id = FLOW_ACTION_WAKE;
2991                 break;
2992         default:
2993                 act->id = FLOW_ACTION_QUEUE;
2994                 if (fs->flow_type & FLOW_RSS)
2995                         act->queue.ctx = input->rss_ctx;
2996
2997                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
2998                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
2999                 break;
3000         }
3001
3002         return flow;
3003 }
3004 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3005
3006 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3007 {
3008         kfree(flow->rule);
3009         kfree(flow);
3010 }
3011 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);