net/ethtool/ioctl.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/ethtool.c - Ethtool ioctl handler
   4  * Copyright (c) 2003 Matthew Wilcox <[email protected]>
   5  *
   6  * This file is where we call all the ethtool_ops commands to get
   7  * the information ethtool needs.
   8  */
   9
  10 #include <linux/compat.h>
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/capability.h>
  14 #include <linux/errno.h>
  15 #include <linux/ethtool.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/net_tstamp.h>
  18 #include <linux/phy.h>
  19 #include <linux/bitops.h>
  20 #include <linux/uaccess.h>
  21 #include <linux/vmalloc.h>
  22 #include <linux/sfp.h>
  23 #include <linux/slab.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/sched/signal.h>
  26 #include <linux/net.h>
  27 #include <linux/pm_runtime.h>
  28 #include <net/devlink.h>
  29 #include <net/xdp_sock_drv.h>
  30 #include <net/flow_offload.h>
  31 #include <linux/ethtool_netlink.h>
  32 #include <generated/utsrelease.h>
  33 #include "common.h"
  34
  35 /* State held across locks and calls for commands which have devlink fallback */
  36 struct ethtool_devlink_compat {
  37         struct devlink *devlink;
  38         union {
  39                 struct ethtool_flash efl;
  40                 struct ethtool_drvinfo info;
  41         };
  42 };
  43
  44 static struct devlink *netdev_to_devlink_get(struct net_device *dev)
  45 {
  46         struct devlink_port *devlink_port;
  47
  48         if (!dev->netdev_ops->ndo_get_devlink_port)
  49                 return NULL;
  50
  51         devlink_port = dev->netdev_ops->ndo_get_devlink_port(dev);
  52         if (!devlink_port)
  53                 return NULL;
  54
  55         return devlink_try_get(devlink_port->devlink);
  56 }
  57
  58 /*
  59  * Some useful ethtool_ops methods that're device independent.
  60  * If we find that all drivers want to do the same thing here,
  61  * we can turn these into dev_() function calls.
  62  */
  63
  64 u32 ethtool_op_get_link(struct net_device *dev)
  65 {
  66         return netif_carrier_ok(dev) ? 1 : 0;
  67 }
  68 EXPORT_SYMBOL(ethtool_op_get_link);
  69
  70 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  71 {
  72         info->so_timestamping =
  73                 SOF_TIMESTAMPING_TX_SOFTWARE |
  74                 SOF_TIMESTAMPING_RX_SOFTWARE |
  75                 SOF_TIMESTAMPING_SOFTWARE;
  76         info->phc_index = -1;
  77         return 0;
  78 }
  79 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  80
  81 /* Handlers for each ethtool command */
  82
  83 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  84 {
  85         struct ethtool_gfeatures cmd = {
  86                 .cmd = ETHTOOL_GFEATURES,
  87                 .size = ETHTOOL_DEV_FEATURE_WORDS,
  88         };
  89         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  90         u32 __user *sizeaddr;
  91         u32 copy_size;
  92         int i;
  93
  94         /* in case feature bits run out again */
  95         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  96
  97         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  98                 features[i].available = (u32)(dev->hw_features >> (32 * i));
  99                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 100                 features[i].active = (u32)(dev->features >> (32 * i));
 101                 features[i].never_changed =
 102                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 103         }
 104
 105         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 106         if (get_user(copy_size, sizeaddr))
 107                 return -EFAULT;
 108
 109         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 110                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 111
 112         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 113                 return -EFAULT;
 114         useraddr += sizeof(cmd);
 115         if (copy_to_user(useraddr, features,
 116                          array_size(copy_size, sizeof(*features))))
 117                 return -EFAULT;
 118
 119         return 0;
 120 }
 121
 122 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 123 {
 124         struct ethtool_sfeatures cmd;
 125         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 126         netdev_features_t wanted = 0, valid = 0;
 127         int i, ret = 0;
 128
 129         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 130                 return -EFAULT;
 131         useraddr += sizeof(cmd);
 132
 133         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 134                 return -EINVAL;
 135
 136         if (copy_from_user(features, useraddr, sizeof(features)))
 137                 return -EFAULT;
 138
 139         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 140                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 141                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 142         }
 143
 144         if (valid & ~NETIF_F_ETHTOOL_BITS)
 145                 return -EINVAL;
 146
 147         if (valid & ~dev->hw_features) {
 148                 valid &= dev->hw_features;
 149                 ret |= ETHTOOL_F_UNSUPPORTED;
 150         }
 151
 152         dev->wanted_features &= ~valid;
 153         dev->wanted_features |= wanted & valid;
 154         __netdev_update_features(dev);
 155
 156         if ((dev->wanted_features ^ dev->features) & valid)
 157                 ret |= ETHTOOL_F_WISH;
 158
 159         return ret;
 160 }
 161
 162 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 163 {
 164         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 165         const struct ethtool_ops *ops = dev->ethtool_ops;
 166
 167         if (sset == ETH_SS_FEATURES)
 168                 return ARRAY_SIZE(netdev_features_strings);
 169
 170         if (sset == ETH_SS_RSS_HASH_FUNCS)
 171                 return ARRAY_SIZE(rss_hash_func_strings);
 172
 173         if (sset == ETH_SS_TUNABLES)
 174                 return ARRAY_SIZE(tunable_strings);
 175
 176         if (sset == ETH_SS_PHY_TUNABLES)
 177                 return ARRAY_SIZE(phy_tunable_strings);
 178
 179         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 180             !ops->get_ethtool_phy_stats &&
 181             phy_ops && phy_ops->get_sset_count)
 182                 return phy_ops->get_sset_count(dev->phydev);
 183
 184         if (sset == ETH_SS_LINK_MODES)
 185                 return __ETHTOOL_LINK_MODE_MASK_NBITS;
 186
 187         if (ops->get_sset_count && ops->get_strings)
 188                 return ops->get_sset_count(dev, sset);
 189         else
 190                 return -EOPNOTSUPP;
 191 }
 192
 193 static void __ethtool_get_strings(struct net_device *dev,
 194         u32 stringset, u8 *data)
 195 {
 196         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 197         const struct ethtool_ops *ops = dev->ethtool_ops;
 198
 199         if (stringset == ETH_SS_FEATURES)
 200                 memcpy(data, netdev_features_strings,
 201                         sizeof(netdev_features_strings));
 202         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 203                 memcpy(data, rss_hash_func_strings,
 204                        sizeof(rss_hash_func_strings));
 205         else if (stringset == ETH_SS_TUNABLES)
 206                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 207         else if (stringset == ETH_SS_PHY_TUNABLES)
 208                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 209         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 210                  !ops->get_ethtool_phy_stats && phy_ops &&
 211                  phy_ops->get_strings)
 212                 phy_ops->get_strings(dev->phydev, data);
 213         else if (stringset == ETH_SS_LINK_MODES)
 214                 memcpy(data, link_mode_names,
 215                        __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 216         else
 217                 /* ops->get_strings is valid because checked earlier */
 218                 ops->get_strings(dev, stringset, data);
 219 }
 220
 221 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 222 {
 223         /* feature masks of legacy discrete ethtool ops */
 224
 225         switch (eth_cmd) {
 226         case ETHTOOL_GTXCSUM:
 227         case ETHTOOL_STXCSUM:
 228                 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
 229                        NETIF_F_SCTP_CRC;
 230         case ETHTOOL_GRXCSUM:
 231         case ETHTOOL_SRXCSUM:
 232                 return NETIF_F_RXCSUM;
 233         case ETHTOOL_GSG:
 234         case ETHTOOL_SSG:
 235                 return NETIF_F_SG | NETIF_F_FRAGLIST;
 236         case ETHTOOL_GTSO:
 237         case ETHTOOL_STSO:
 238                 return NETIF_F_ALL_TSO;
 239         case ETHTOOL_GGSO:
 240         case ETHTOOL_SGSO:
 241                 return NETIF_F_GSO;
 242         case ETHTOOL_GGRO:
 243         case ETHTOOL_SGRO:
 244                 return NETIF_F_GRO;
 245         default:
 246                 BUG();
 247         }
 248 }
 249
 250 static int ethtool_get_one_feature(struct net_device *dev,
 251         char __user *useraddr, u32 ethcmd)
 252 {
 253         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 254         struct ethtool_value edata = {
 255                 .cmd = ethcmd,
 256                 .data = !!(dev->features & mask),
 257         };
 258
 259         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 260                 return -EFAULT;
 261         return 0;
 262 }
 263
 264 static int ethtool_set_one_feature(struct net_device *dev,
 265         void __user *useraddr, u32 ethcmd)
 266 {
 267         struct ethtool_value edata;
 268         netdev_features_t mask;
 269
 270         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 271                 return -EFAULT;
 272
 273         mask = ethtool_get_feature_mask(ethcmd);
 274         mask &= dev->hw_features;
 275         if (!mask)
 276                 return -EOPNOTSUPP;
 277
 278         if (edata.data)
 279                 dev->wanted_features |= mask;
 280         else
 281                 dev->wanted_features &= ~mask;
 282
 283         __netdev_update_features(dev);
 284
 285         return 0;
 286 }
 287
 288 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 289                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 290 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 291                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 292                           NETIF_F_RXHASH)
 293
 294 static u32 __ethtool_get_flags(struct net_device *dev)
 295 {
 296         u32 flags = 0;
 297
 298         if (dev->features & NETIF_F_LRO)
 299                 flags |= ETH_FLAG_LRO;
 300         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 301                 flags |= ETH_FLAG_RXVLAN;
 302         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 303                 flags |= ETH_FLAG_TXVLAN;
 304         if (dev->features & NETIF_F_NTUPLE)
 305                 flags |= ETH_FLAG_NTUPLE;
 306         if (dev->features & NETIF_F_RXHASH)
 307                 flags |= ETH_FLAG_RXHASH;
 308
 309         return flags;
 310 }
 311
 312 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 313 {
 314         netdev_features_t features = 0, changed;
 315
 316         if (data & ~ETH_ALL_FLAGS)
 317                 return -EINVAL;
 318
 319         if (data & ETH_FLAG_LRO)
 320                 features |= NETIF_F_LRO;
 321         if (data & ETH_FLAG_RXVLAN)
 322                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 323         if (data & ETH_FLAG_TXVLAN)
 324                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 325         if (data & ETH_FLAG_NTUPLE)
 326                 features |= NETIF_F_NTUPLE;
 327         if (data & ETH_FLAG_RXHASH)
 328                 features |= NETIF_F_RXHASH;
 329
 330         /* allow changing only bits set in hw_features */
 331         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 332         if (changed & ~dev->hw_features)
 333                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 334
 335         dev->wanted_features =
 336                 (dev->wanted_features & ~changed) | (features & changed);
 337
 338         __netdev_update_features(dev);
 339
 340         return 0;
 341 }
 342
 343 /* Given two link masks, AND them together and save the result in dst. */
 344 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 345                                   struct ethtool_link_ksettings *src)
 346 {
 347         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 348         unsigned int idx = 0;
 349
 350         for (; idx < size; idx++) {
 351                 dst->link_modes.supported[idx] &=
 352                         src->link_modes.supported[idx];
 353                 dst->link_modes.advertising[idx] &=
 354                         src->link_modes.advertising[idx];
 355         }
 356 }
 357 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 358
 359 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 360                                              u32 legacy_u32)
 361 {
 362         linkmode_zero(dst);
 363         dst[0] = legacy_u32;
 364 }
 365 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 366
 367 /* return false if src had higher bits set. lower bits always updated. */
 368 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 369                                              const unsigned long *src)
 370 {
 371         bool retval = true;
 372
 373         /* TODO: following test will soon always be true */
 374         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 375                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 376
 377                 linkmode_zero(ext);
 378                 bitmap_fill(ext, 32);
 379                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 380                 if (linkmode_intersects(ext, src)) {
 381                         /* src mask goes beyond bit 31 */
 382                         retval = false;
 383                 }
 384         }
 385         *legacy_u32 = src[0];
 386         return retval;
 387 }
 388 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 389
 390 /* return false if ksettings link modes had higher bits
 391  * set. legacy_settings always updated (best effort)
 392  */
 393 static bool
 394 convert_link_ksettings_to_legacy_settings(
 395         struct ethtool_cmd *legacy_settings,
 396         const struct ethtool_link_ksettings *link_ksettings)
 397 {
 398         bool retval = true;
 399
 400         memset(legacy_settings, 0, sizeof(*legacy_settings));
 401         /* this also clears the deprecated fields in legacy structure:
 402          * __u8         transceiver;
 403          * __u32        maxtxpkt;
 404          * __u32        maxrxpkt;
 405          */
 406
 407         retval &= ethtool_convert_link_mode_to_legacy_u32(
 408                 &legacy_settings->supported,
 409                 link_ksettings->link_modes.supported);
 410         retval &= ethtool_convert_link_mode_to_legacy_u32(
 411                 &legacy_settings->advertising,
 412                 link_ksettings->link_modes.advertising);
 413         retval &= ethtool_convert_link_mode_to_legacy_u32(
 414                 &legacy_settings->lp_advertising,
 415                 link_ksettings->link_modes.lp_advertising);
 416         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 417         legacy_settings->duplex
 418                 = link_ksettings->base.duplex;
 419         legacy_settings->port
 420                 = link_ksettings->base.port;
 421         legacy_settings->phy_address
 422                 = link_ksettings->base.phy_address;
 423         legacy_settings->autoneg
 424                 = link_ksettings->base.autoneg;
 425         legacy_settings->mdio_support
 426                 = link_ksettings->base.mdio_support;
 427         legacy_settings->eth_tp_mdix
 428                 = link_ksettings->base.eth_tp_mdix;
 429         legacy_settings->eth_tp_mdix_ctrl
 430                 = link_ksettings->base.eth_tp_mdix_ctrl;
 431         legacy_settings->transceiver
 432                 = link_ksettings->base.transceiver;
 433         return retval;
 434 }
 435
 436 /* number of 32-bit words to store the user's link mode bitmaps */
 437 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 438         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 439
 440 /* layout of the struct passed from/to userland */
 441 struct ethtool_link_usettings {
 442         struct ethtool_link_settings base;
 443         struct {
 444                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 445                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 446                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 447         } link_modes;
 448 };
 449
 450 /* Internal kernel helper to query a device ethtool_link_settings. */
 451 int __ethtool_get_link_ksettings(struct net_device *dev,
 452                                  struct ethtool_link_ksettings *link_ksettings)
 453 {
 454         ASSERT_RTNL();
 455
 456         if (!dev->ethtool_ops->get_link_ksettings)
 457                 return -EOPNOTSUPP;
 458
 459         memset(link_ksettings, 0, sizeof(*link_ksettings));
 460         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 461 }
 462 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 463
 464 /* convert ethtool_link_usettings in user space to a kernel internal
 465  * ethtool_link_ksettings. return 0 on success, errno on error.
 466  */
 467 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 468                                          const void __user *from)
 469 {
 470         struct ethtool_link_usettings link_usettings;
 471
 472         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 473                 return -EFAULT;
 474
 475         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 476         bitmap_from_arr32(to->link_modes.supported,
 477                           link_usettings.link_modes.supported,
 478                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 479         bitmap_from_arr32(to->link_modes.advertising,
 480                           link_usettings.link_modes.advertising,
 481                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 482         bitmap_from_arr32(to->link_modes.lp_advertising,
 483                           link_usettings.link_modes.lp_advertising,
 484                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 485
 486         return 0;
 487 }
 488
 489 /* Check if the user is trying to change anything besides speed/duplex */
 490 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
 491 {
 492         struct ethtool_link_settings base2 = {};
 493
 494         base2.speed = cmd->base.speed;
 495         base2.port = PORT_OTHER;
 496         base2.duplex = cmd->base.duplex;
 497         base2.cmd = cmd->base.cmd;
 498         base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
 499
 500         return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
 501                 bitmap_empty(cmd->link_modes.supported,
 502                              __ETHTOOL_LINK_MODE_MASK_NBITS) &&
 503                 bitmap_empty(cmd->link_modes.lp_advertising,
 504                              __ETHTOOL_LINK_MODE_MASK_NBITS);
 505 }
 506
 507 /* convert a kernel internal ethtool_link_ksettings to
 508  * ethtool_link_usettings in user space. return 0 on success, errno on
 509  * error.
 510  */
 511 static int
 512 store_link_ksettings_for_user(void __user *to,
 513                               const struct ethtool_link_ksettings *from)
 514 {
 515         struct ethtool_link_usettings link_usettings;
 516
 517         memcpy(&link_usettings, from, sizeof(link_usettings));
 518         bitmap_to_arr32(link_usettings.link_modes.supported,
 519                         from->link_modes.supported,
 520                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 521         bitmap_to_arr32(link_usettings.link_modes.advertising,
 522                         from->link_modes.advertising,
 523                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 524         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 525                         from->link_modes.lp_advertising,
 526                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 527
 528         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 529                 return -EFAULT;
 530
 531         return 0;
 532 }
 533
 534 /* Query device for its ethtool_link_settings. */
 535 static int ethtool_get_link_ksettings(struct net_device *dev,
 536                                       void __user *useraddr)
 537 {
 538         int err = 0;
 539         struct ethtool_link_ksettings link_ksettings;
 540
 541         ASSERT_RTNL();
 542         if (!dev->ethtool_ops->get_link_ksettings)
 543                 return -EOPNOTSUPP;
 544
 545         /* handle bitmap nbits handshake */
 546         if (copy_from_user(&link_ksettings.base, useraddr,
 547                            sizeof(link_ksettings.base)))
 548                 return -EFAULT;
 549
 550         if (__ETHTOOL_LINK_MODE_MASK_NU32
 551             != link_ksettings.base.link_mode_masks_nwords) {
 552                 /* wrong link mode nbits requested */
 553                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 554                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 555                 /* send back number of words required as negative val */
 556                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 557                                    "need too many bits for link modes!");
 558                 link_ksettings.base.link_mode_masks_nwords
 559                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 560
 561                 /* copy the base fields back to user, not the link
 562                  * mode bitmaps
 563                  */
 564                 if (copy_to_user(useraddr, &link_ksettings.base,
 565                                  sizeof(link_ksettings.base)))
 566                         return -EFAULT;
 567
 568                 return 0;
 569         }
 570
 571         /* handshake successful: user/kernel agree on
 572          * link_mode_masks_nwords
 573          */
 574
 575         memset(&link_ksettings, 0, sizeof(link_ksettings));
 576         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 577         if (err < 0)
 578                 return err;
 579
 580         /* make sure we tell the right values to user */
 581         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 582         link_ksettings.base.link_mode_masks_nwords
 583                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 584         link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
 585         link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 586
 587         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 588 }
 589
 590 /* Update device ethtool_link_settings. */
 591 static int ethtool_set_link_ksettings(struct net_device *dev,
 592                                       void __user *useraddr)
 593 {
 594         int err;
 595         struct ethtool_link_ksettings link_ksettings;
 596
 597         ASSERT_RTNL();
 598
 599         if (!dev->ethtool_ops->set_link_ksettings)
 600                 return -EOPNOTSUPP;
 601
 602         /* make sure nbits field has expected value */
 603         if (copy_from_user(&link_ksettings.base, useraddr,
 604                            sizeof(link_ksettings.base)))
 605                 return -EFAULT;
 606
 607         if (__ETHTOOL_LINK_MODE_MASK_NU32
 608             != link_ksettings.base.link_mode_masks_nwords)
 609                 return -EINVAL;
 610
 611         /* copy the whole structure, now that we know it has expected
 612          * format
 613          */
 614         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 615         if (err)
 616                 return err;
 617
 618         /* re-check nwords field, just in case */
 619         if (__ETHTOOL_LINK_MODE_MASK_NU32
 620             != link_ksettings.base.link_mode_masks_nwords)
 621                 return -EINVAL;
 622
 623         if (link_ksettings.base.master_slave_cfg ||
 624             link_ksettings.base.master_slave_state)
 625                 return -EINVAL;
 626
 627         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 628         if (err >= 0) {
 629                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 630                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 631         }
 632         return err;
 633 }
 634
 635 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 636                                        const struct ethtool_link_ksettings *cmd,
 637                                        u32 *dev_speed, u8 *dev_duplex)
 638 {
 639         u32 speed;
 640         u8 duplex;
 641
 642         speed = cmd->base.speed;
 643         duplex = cmd->base.duplex;
 644         /* don't allow custom speed and duplex */
 645         if (!ethtool_validate_speed(speed) ||
 646             !ethtool_validate_duplex(duplex) ||
 647             !ethtool_virtdev_validate_cmd(cmd))
 648                 return -EINVAL;
 649         *dev_speed = speed;
 650         *dev_duplex = duplex;
 651
 652         return 0;
 653 }
 654 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 655
 656 /* Query device for its ethtool_cmd settings.
 657  *
 658  * Backward compatibility note: for compatibility with legacy ethtool, this is
 659  * now implemented via get_link_ksettings. When driver reports higher link mode
 660  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 661  * recommend user to upgrade ethtool, but the command is successful (only the
 662  * lower link mode bits reported back to user). Deprecated fields from
 663  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 664  */
 665 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 666 {
 667         struct ethtool_link_ksettings link_ksettings;
 668         struct ethtool_cmd cmd;
 669         int err;
 670
 671         ASSERT_RTNL();
 672         if (!dev->ethtool_ops->get_link_ksettings)
 673                 return -EOPNOTSUPP;
 674
 675         memset(&link_ksettings, 0, sizeof(link_ksettings));
 676         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 677         if (err < 0)
 678                 return err;
 679         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 680
 681         /* send a sensible cmd tag back to user */
 682         cmd.cmd = ETHTOOL_GSET;
 683
 684         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 685                 return -EFAULT;
 686
 687         return 0;
 688 }
 689
 690 /* Update device link settings with given ethtool_cmd.
 691  *
 692  * Backward compatibility note: for compatibility with legacy ethtool, this is
 693  * now always implemented via set_link_settings. When user's request updates
 694  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 695  * warning is logged once (with name of 1st driver/device) to recommend user to
 696  * upgrade ethtool, and the request is rejected.
 697  */
 698 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 699 {
 700         struct ethtool_link_ksettings link_ksettings;
 701         struct ethtool_cmd cmd;
 702         int ret;
 703
 704         ASSERT_RTNL();
 705
 706         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 707                 return -EFAULT;
 708         if (!dev->ethtool_ops->set_link_ksettings)
 709                 return -EOPNOTSUPP;
 710
 711         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 712                 return -EINVAL;
 713         link_ksettings.base.link_mode_masks_nwords =
 714                 __ETHTOOL_LINK_MODE_MASK_NU32;
 715         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 716         if (ret >= 0) {
 717                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 718                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 719         }
 720         return ret;
 721 }
 722
 723 static int
 724 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
 725 {
 726         const struct ethtool_ops *ops = dev->ethtool_ops;
 727
 728         rsp->info.cmd = ETHTOOL_GDRVINFO;
 729         strlcpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version));
 730         if (ops->get_drvinfo) {
 731                 ops->get_drvinfo(dev, &rsp->info);
 732         } else if (dev->dev.parent && dev->dev.parent->driver) {
 733                 strlcpy(rsp->info.bus_info, dev_name(dev->dev.parent),
 734                         sizeof(rsp->info.bus_info));
 735                 strlcpy(rsp->info.driver, dev->dev.parent->driver->name,
 736                         sizeof(rsp->info.driver));
 737         } else {
 738                 return -EOPNOTSUPP;
 739         }
 740
 741         /*
 742          * this method of obtaining string set info is deprecated;
 743          * Use ETHTOOL_GSSET_INFO instead.
 744          */
 745         if (ops->get_sset_count) {
 746                 int rc;
 747
 748                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 749                 if (rc >= 0)
 750                         rsp->info.testinfo_len = rc;
 751                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 752                 if (rc >= 0)
 753                         rsp->info.n_stats = rc;
 754                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 755                 if (rc >= 0)
 756                         rsp->info.n_priv_flags = rc;
 757         }
 758         if (ops->get_regs_len) {
 759                 int ret = ops->get_regs_len(dev);
 760
 761                 if (ret > 0)
 762                         rsp->info.regdump_len = ret;
 763         }
 764
 765         if (ops->get_eeprom_len)
 766                 rsp->info.eedump_len = ops->get_eeprom_len(dev);
 767
 768         if (!rsp->info.fw_version[0])
 769                 rsp->devlink = netdev_to_devlink_get(dev);
 770
 771         return 0;
 772 }
 773
 774 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 775                                                     void __user *useraddr)
 776 {
 777         struct ethtool_sset_info info;
 778         u64 sset_mask;
 779         int i, idx = 0, n_bits = 0, ret, rc;
 780         u32 *info_buf = NULL;
 781
 782         if (copy_from_user(&info, useraddr, sizeof(info)))
 783                 return -EFAULT;
 784
 785         /* store copy of mask, because we zero struct later on */
 786         sset_mask = info.sset_mask;
 787         if (!sset_mask)
 788                 return 0;
 789
 790         /* calculate size of return buffer */
 791         n_bits = hweight64(sset_mask);
 792
 793         memset(&info, 0, sizeof(info));
 794         info.cmd = ETHTOOL_GSSET_INFO;
 795
 796         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 797         if (!info_buf)
 798                 return -ENOMEM;
 799
 800         /*
 801          * fill return buffer based on input bitmask and successful
 802          * get_sset_count return
 803          */
 804         for (i = 0; i < 64; i++) {
 805                 if (!(sset_mask & (1ULL << i)))
 806                         continue;
 807
 808                 rc = __ethtool_get_sset_count(dev, i);
 809                 if (rc >= 0) {
 810                         info.sset_mask |= (1ULL << i);
 811                         info_buf[idx++] = rc;
 812                 }
 813         }
 814
 815         ret = -EFAULT;
 816         if (copy_to_user(useraddr, &info, sizeof(info)))
 817                 goto out;
 818
 819         useraddr += offsetof(struct ethtool_sset_info, data);
 820         if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
 821                 goto out;
 822
 823         ret = 0;
 824
 825 out:
 826         kfree(info_buf);
 827         return ret;
 828 }
 829
 830 static noinline_for_stack int
 831 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
 832                                const struct compat_ethtool_rxnfc __user *useraddr,
 833                                size_t size)
 834 {
 835         struct compat_ethtool_rxnfc crxnfc = {};
 836
 837         /* We expect there to be holes between fs.m_ext and
 838          * fs.ring_cookie and at the end of fs, but nowhere else.
 839          * On non-x86, no conversion should be needed.
 840          */
 841         BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
 842                      sizeof(struct compat_ethtool_rxnfc) !=
 843                      sizeof(struct ethtool_rxnfc));
 844         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
 845                      sizeof(useraddr->fs.m_ext) !=
 846                      offsetof(struct ethtool_rxnfc, fs.m_ext) +
 847                      sizeof(rxnfc->fs.m_ext));
 848         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
 849                      offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
 850                      offsetof(struct ethtool_rxnfc, fs.location) -
 851                      offsetof(struct ethtool_rxnfc, fs.ring_cookie));
 852
 853         if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
 854                 return -EFAULT;
 855
 856         *rxnfc = (struct ethtool_rxnfc) {
 857                 .cmd            = crxnfc.cmd,
 858                 .flow_type      = crxnfc.flow_type,
 859                 .data           = crxnfc.data,
 860                 .fs             = {
 861                         .flow_type      = crxnfc.fs.flow_type,
 862                         .h_u            = crxnfc.fs.h_u,
 863                         .h_ext          = crxnfc.fs.h_ext,
 864                         .m_u            = crxnfc.fs.m_u,
 865                         .m_ext          = crxnfc.fs.m_ext,
 866                         .ring_cookie    = crxnfc.fs.ring_cookie,
 867                         .location       = crxnfc.fs.location,
 868                 },
 869                 .rule_cnt       = crxnfc.rule_cnt,
 870         };
 871
 872         return 0;
 873 }
 874
 875 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
 876                                         const void __user *useraddr,
 877                                         size_t size)
 878 {
 879         if (compat_need_64bit_alignment_fixup())
 880                 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
 881
 882         if (copy_from_user(rxnfc, useraddr, size))
 883                 return -EFAULT;
 884
 885         return 0;
 886 }
 887
 888 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
 889                                         const struct ethtool_rxnfc *rxnfc,
 890                                         size_t size, const u32 *rule_buf)
 891 {
 892         struct compat_ethtool_rxnfc crxnfc;
 893
 894         memset(&crxnfc, 0, sizeof(crxnfc));
 895         crxnfc = (struct compat_ethtool_rxnfc) {
 896                 .cmd            = rxnfc->cmd,
 897                 .flow_type      = rxnfc->flow_type,
 898                 .data           = rxnfc->data,
 899                 .fs             = {
 900                         .flow_type      = rxnfc->fs.flow_type,
 901                         .h_u            = rxnfc->fs.h_u,
 902                         .h_ext          = rxnfc->fs.h_ext,
 903                         .m_u            = rxnfc->fs.m_u,
 904                         .m_ext          = rxnfc->fs.m_ext,
 905                         .ring_cookie    = rxnfc->fs.ring_cookie,
 906                         .location       = rxnfc->fs.location,
 907                 },
 908                 .rule_cnt       = rxnfc->rule_cnt,
 909         };
 910
 911         if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
 912                 return -EFAULT;
 913
 914         return 0;
 915 }
 916
 917 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
 918                                       const struct ethtool_rxnfc *rxnfc,
 919                                       size_t size, const u32 *rule_buf)
 920 {
 921         int ret;
 922
 923         if (compat_need_64bit_alignment_fixup()) {
 924                 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
 925                                                    rule_buf);
 926                 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
 927         } else {
 928                 ret = copy_to_user(useraddr, rxnfc, size);
 929                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 930         }
 931
 932         if (ret)
 933                 return -EFAULT;
 934
 935         if (rule_buf) {
 936                 if (copy_to_user(useraddr, rule_buf,
 937                                  rxnfc->rule_cnt * sizeof(u32)))
 938                         return -EFAULT;
 939         }
 940
 941         return 0;
 942 }
 943
 944 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 945                                                 u32 cmd, void __user *useraddr)
 946 {
 947         struct ethtool_rxnfc info;
 948         size_t info_size = sizeof(info);
 949         int rc;
 950
 951         if (!dev->ethtool_ops->set_rxnfc)
 952                 return -EOPNOTSUPP;
 953
 954         /* struct ethtool_rxnfc was originally defined for
 955          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 956          * members.  User-space might still be using that
 957          * definition. */
 958         if (cmd == ETHTOOL_SRXFH)
 959                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 960                              sizeof(info.data));
 961
 962         if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
 963                 return -EFAULT;
 964
 965         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 966         if (rc)
 967                 return rc;
 968
 969         if (cmd == ETHTOOL_SRXCLSRLINS &&
 970             ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
 971                 return -EFAULT;
 972
 973         return 0;
 974 }
 975
 976 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 977                                                 u32 cmd, void __user *useraddr)
 978 {
 979         struct ethtool_rxnfc info;
 980         size_t info_size = sizeof(info);
 981         const struct ethtool_ops *ops = dev->ethtool_ops;
 982         int ret;
 983         void *rule_buf = NULL;
 984
 985         if (!ops->get_rxnfc)
 986                 return -EOPNOTSUPP;
 987
 988         /* struct ethtool_rxnfc was originally defined for
 989          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 990          * members.  User-space might still be using that
 991          * definition. */
 992         if (cmd == ETHTOOL_GRXFH)
 993                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 994                              sizeof(info.data));
 995
 996         if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
 997                 return -EFAULT;
 998
 999         /* If FLOW_RSS was requested then user-space must be using the
1000          * new definition, as FLOW_RSS is newer.
1001          */
1002         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
1003                 info_size = sizeof(info);
1004                 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
1005                         return -EFAULT;
1006                 /* Since malicious users may modify the original data,
1007                  * we need to check whether FLOW_RSS is still requested.
1008                  */
1009                 if (!(info.flow_type & FLOW_RSS))
1010                         return -EINVAL;
1011         }
1012
1013         if (info.cmd != cmd)
1014                 return -EINVAL;
1015
1016         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1017                 if (info.rule_cnt > 0) {
1018                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1019                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1020                                                    GFP_USER);
1021                         if (!rule_buf)
1022                                 return -ENOMEM;
1023                 }
1024         }
1025
1026         ret = ops->get_rxnfc(dev, &info, rule_buf);
1027         if (ret < 0)
1028                 goto err_out;
1029
1030         ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1031 err_out:
1032         kfree(rule_buf);
1033
1034         return ret;
1035 }
1036
1037 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1038                                         struct ethtool_rxnfc *rx_rings,
1039                                         u32 size)
1040 {
1041         int i;
1042
1043         if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1044                 return -EFAULT;
1045
1046         /* Validate ring indices */
1047         for (i = 0; i < size; i++)
1048                 if (indir[i] >= rx_rings->data)
1049                         return -EINVAL;
1050
1051         return 0;
1052 }
1053
1054 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1055
1056 void netdev_rss_key_fill(void *buffer, size_t len)
1057 {
1058         BUG_ON(len > sizeof(netdev_rss_key));
1059         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1060         memcpy(buffer, netdev_rss_key, len);
1061 }
1062 EXPORT_SYMBOL(netdev_rss_key_fill);
1063
1064 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1065                                                      void __user *useraddr)
1066 {
1067         u32 user_size, dev_size;
1068         u32 *indir;
1069         int ret;
1070
1071         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1072             !dev->ethtool_ops->get_rxfh)
1073                 return -EOPNOTSUPP;
1074         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1075         if (dev_size == 0)
1076                 return -EOPNOTSUPP;
1077
1078         if (copy_from_user(&user_size,
1079                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1080                            sizeof(user_size)))
1081                 return -EFAULT;
1082
1083         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1084                          &dev_size, sizeof(dev_size)))
1085                 return -EFAULT;
1086
1087         /* If the user buffer size is 0, this is just a query for the
1088          * device table size.  Otherwise, if it's smaller than the
1089          * device table size it's an error.
1090          */
1091         if (user_size < dev_size)
1092                 return user_size == 0 ? 0 : -EINVAL;
1093
1094         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1095         if (!indir)
1096                 return -ENOMEM;
1097
1098         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1099         if (ret)
1100                 goto out;
1101
1102         if (copy_to_user(useraddr +
1103                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1104                          indir, dev_size * sizeof(indir[0])))
1105                 ret = -EFAULT;
1106
1107 out:
1108         kfree(indir);
1109         return ret;
1110 }
1111
1112 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1113                                                      void __user *useraddr)
1114 {
1115         struct ethtool_rxnfc rx_rings;
1116         u32 user_size, dev_size, i;
1117         u32 *indir;
1118         const struct ethtool_ops *ops = dev->ethtool_ops;
1119         int ret;
1120         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1121
1122         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1123             !ops->get_rxnfc)
1124                 return -EOPNOTSUPP;
1125
1126         dev_size = ops->get_rxfh_indir_size(dev);
1127         if (dev_size == 0)
1128                 return -EOPNOTSUPP;
1129
1130         if (copy_from_user(&user_size,
1131                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1132                            sizeof(user_size)))
1133                 return -EFAULT;
1134
1135         if (user_size != 0 && user_size != dev_size)
1136                 return -EINVAL;
1137
1138         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1139         if (!indir)
1140                 return -ENOMEM;
1141
1142         rx_rings.cmd = ETHTOOL_GRXRINGS;
1143         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1144         if (ret)
1145                 goto out;
1146
1147         if (user_size == 0) {
1148                 for (i = 0; i < dev_size; i++)
1149                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1150         } else {
1151                 ret = ethtool_copy_validate_indir(indir,
1152                                                   useraddr + ringidx_offset,
1153                                                   &rx_rings,
1154                                                   dev_size);
1155                 if (ret)
1156                         goto out;
1157         }
1158
1159         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1160         if (ret)
1161                 goto out;
1162
1163         /* indicate whether rxfh was set to default */
1164         if (user_size == 0)
1165                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1166         else
1167                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1168
1169 out:
1170         kfree(indir);
1171         return ret;
1172 }
1173
1174 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1175                                                void __user *useraddr)
1176 {
1177         int ret;
1178         const struct ethtool_ops *ops = dev->ethtool_ops;
1179         u32 user_indir_size, user_key_size;
1180         u32 dev_indir_size = 0, dev_key_size = 0;
1181         struct ethtool_rxfh rxfh;
1182         u32 total_size;
1183         u32 indir_bytes;
1184         u32 *indir = NULL;
1185         u8 dev_hfunc = 0;
1186         u8 *hkey = NULL;
1187         u8 *rss_config;
1188
1189         if (!ops->get_rxfh)
1190                 return -EOPNOTSUPP;
1191
1192         if (ops->get_rxfh_indir_size)
1193                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1194         if (ops->get_rxfh_key_size)
1195                 dev_key_size = ops->get_rxfh_key_size(dev);
1196
1197         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1198                 return -EFAULT;
1199         user_indir_size = rxfh.indir_size;
1200         user_key_size = rxfh.key_size;
1201
1202         /* Check that reserved fields are 0 for now */
1203         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1204                 return -EINVAL;
1205         /* Most drivers don't handle rss_context, check it's 0 as well */
1206         if (rxfh.rss_context && !ops->get_rxfh_context)
1207                 return -EOPNOTSUPP;
1208
1209         rxfh.indir_size = dev_indir_size;
1210         rxfh.key_size = dev_key_size;
1211         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1212                 return -EFAULT;
1213
1214         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1215             (user_key_size && (user_key_size != dev_key_size)))
1216                 return -EINVAL;
1217
1218         indir_bytes = user_indir_size * sizeof(indir[0]);
1219         total_size = indir_bytes + user_key_size;
1220         rss_config = kzalloc(total_size, GFP_USER);
1221         if (!rss_config)
1222                 return -ENOMEM;
1223
1224         if (user_indir_size)
1225                 indir = (u32 *)rss_config;
1226
1227         if (user_key_size)
1228                 hkey = rss_config + indir_bytes;
1229
1230         if (rxfh.rss_context)
1231                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1232                                                          &dev_hfunc,
1233                                                          rxfh.rss_context);
1234         else
1235                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1236         if (ret)
1237                 goto out;
1238
1239         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1240                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1241                 ret = -EFAULT;
1242         } else if (copy_to_user(useraddr +
1243                               offsetof(struct ethtool_rxfh, rss_config[0]),
1244                               rss_config, total_size)) {
1245                 ret = -EFAULT;
1246         }
1247 out:
1248         kfree(rss_config);
1249
1250         return ret;
1251 }
1252
1253 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1254                                                void __user *useraddr)
1255 {
1256         int ret;
1257         const struct ethtool_ops *ops = dev->ethtool_ops;
1258         struct ethtool_rxnfc rx_rings;
1259         struct ethtool_rxfh rxfh;
1260         u32 dev_indir_size = 0, dev_key_size = 0, i;
1261         u32 *indir = NULL, indir_bytes = 0;
1262         u8 *hkey = NULL;
1263         u8 *rss_config;
1264         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1265         bool delete = false;
1266
1267         if (!ops->get_rxnfc || !ops->set_rxfh)
1268                 return -EOPNOTSUPP;
1269
1270         if (ops->get_rxfh_indir_size)
1271                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1272         if (ops->get_rxfh_key_size)
1273                 dev_key_size = ops->get_rxfh_key_size(dev);
1274
1275         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1276                 return -EFAULT;
1277
1278         /* Check that reserved fields are 0 for now */
1279         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1280                 return -EINVAL;
1281         /* Most drivers don't handle rss_context, check it's 0 as well */
1282         if (rxfh.rss_context && !ops->set_rxfh_context)
1283                 return -EOPNOTSUPP;
1284
1285         /* If either indir, hash key or function is valid, proceed further.
1286          * Must request at least one change: indir size, hash key or function.
1287          */
1288         if ((rxfh.indir_size &&
1289              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1290              rxfh.indir_size != dev_indir_size) ||
1291             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1292             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1293              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1294                 return -EINVAL;
1295
1296         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1297                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1298
1299         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1300         if (!rss_config)
1301                 return -ENOMEM;
1302
1303         rx_rings.cmd = ETHTOOL_GRXRINGS;
1304         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1305         if (ret)
1306                 goto out;
1307
1308         /* rxfh.indir_size == 0 means reset the indir table to default (master
1309          * context) or delete the context (other RSS contexts).
1310          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1311          */
1312         if (rxfh.indir_size &&
1313             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1314                 indir = (u32 *)rss_config;
1315                 ret = ethtool_copy_validate_indir(indir,
1316                                                   useraddr + rss_cfg_offset,
1317                                                   &rx_rings,
1318                                                   rxfh.indir_size);
1319                 if (ret)
1320                         goto out;
1321         } else if (rxfh.indir_size == 0) {
1322                 if (rxfh.rss_context == 0) {
1323                         indir = (u32 *)rss_config;
1324                         for (i = 0; i < dev_indir_size; i++)
1325                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1326                 } else {
1327                         delete = true;
1328                 }
1329         }
1330
1331         if (rxfh.key_size) {
1332                 hkey = rss_config + indir_bytes;
1333                 if (copy_from_user(hkey,
1334                                    useraddr + rss_cfg_offset + indir_bytes,
1335                                    rxfh.key_size)) {
1336                         ret = -EFAULT;
1337                         goto out;
1338                 }
1339         }
1340
1341         if (rxfh.rss_context)
1342                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1343                                             &rxfh.rss_context, delete);
1344         else
1345                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1346         if (ret)
1347                 goto out;
1348
1349         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1350                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1351                 ret = -EFAULT;
1352
1353         if (!rxfh.rss_context) {
1354                 /* indicate whether rxfh was set to default */
1355                 if (rxfh.indir_size == 0)
1356                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1357                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1358                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1359         }
1360
1361 out:
1362         kfree(rss_config);
1363         return ret;
1364 }
1365
1366 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1367 {
1368         struct ethtool_regs regs;
1369         const struct ethtool_ops *ops = dev->ethtool_ops;
1370         void *regbuf;
1371         int reglen, ret;
1372
1373         if (!ops->get_regs || !ops->get_regs_len)
1374                 return -EOPNOTSUPP;
1375
1376         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1377                 return -EFAULT;
1378
1379         reglen = ops->get_regs_len(dev);
1380         if (reglen <= 0)
1381                 return reglen;
1382
1383         if (regs.len > reglen)
1384                 regs.len = reglen;
1385
1386         regbuf = vzalloc(reglen);
1387         if (!regbuf)
1388                 return -ENOMEM;
1389
1390         if (regs.len < reglen)
1391                 reglen = regs.len;
1392
1393         ops->get_regs(dev, &regs, regbuf);
1394
1395         ret = -EFAULT;
1396         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1397                 goto out;
1398         useraddr += offsetof(struct ethtool_regs, data);
1399         if (copy_to_user(useraddr, regbuf, reglen))
1400                 goto out;
1401         ret = 0;
1402
1403  out:
1404         vfree(regbuf);
1405         return ret;
1406 }
1407
1408 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1409 {
1410         struct ethtool_value reset;
1411         int ret;
1412
1413         if (!dev->ethtool_ops->reset)
1414                 return -EOPNOTSUPP;
1415
1416         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1417                 return -EFAULT;
1418
1419         ret = dev->ethtool_ops->reset(dev, &reset.data);
1420         if (ret)
1421                 return ret;
1422
1423         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1424                 return -EFAULT;
1425         return 0;
1426 }
1427
1428 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1429 {
1430         struct ethtool_wolinfo wol;
1431
1432         if (!dev->ethtool_ops->get_wol)
1433                 return -EOPNOTSUPP;
1434
1435         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1436         wol.cmd = ETHTOOL_GWOL;
1437         dev->ethtool_ops->get_wol(dev, &wol);
1438
1439         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1440                 return -EFAULT;
1441         return 0;
1442 }
1443
1444 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1445 {
1446         struct ethtool_wolinfo wol;
1447         int ret;
1448
1449         if (!dev->ethtool_ops->set_wol)
1450                 return -EOPNOTSUPP;
1451
1452         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1453                 return -EFAULT;
1454
1455         ret = dev->ethtool_ops->set_wol(dev, &wol);
1456         if (ret)
1457                 return ret;
1458
1459         dev->wol_enabled = !!wol.wolopts;
1460         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1461
1462         return 0;
1463 }
1464
1465 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1466 {
1467         struct ethtool_eee edata;
1468         int rc;
1469
1470         if (!dev->ethtool_ops->get_eee)
1471                 return -EOPNOTSUPP;
1472
1473         memset(&edata, 0, sizeof(struct ethtool_eee));
1474         edata.cmd = ETHTOOL_GEEE;
1475         rc = dev->ethtool_ops->get_eee(dev, &edata);
1476
1477         if (rc)
1478                 return rc;
1479
1480         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1481                 return -EFAULT;
1482
1483         return 0;
1484 }
1485
1486 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1487 {
1488         struct ethtool_eee edata;
1489         int ret;
1490
1491         if (!dev->ethtool_ops->set_eee)
1492                 return -EOPNOTSUPP;
1493
1494         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1495                 return -EFAULT;
1496
1497         ret = dev->ethtool_ops->set_eee(dev, &edata);
1498         if (!ret)
1499                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1500         return ret;
1501 }
1502
1503 static int ethtool_nway_reset(struct net_device *dev)
1504 {
1505         if (!dev->ethtool_ops->nway_reset)
1506                 return -EOPNOTSUPP;
1507
1508         return dev->ethtool_ops->nway_reset(dev);
1509 }
1510
1511 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1512 {
1513         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1514         int link = __ethtool_get_link(dev);
1515
1516         if (link < 0)
1517                 return link;
1518
1519         edata.data = link;
1520         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1521                 return -EFAULT;
1522         return 0;
1523 }
1524
1525 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1526                                   int (*getter)(struct net_device *,
1527                                                 struct ethtool_eeprom *, u8 *),
1528                                   u32 total_len)
1529 {
1530         struct ethtool_eeprom eeprom;
1531         void __user *userbuf = useraddr + sizeof(eeprom);
1532         u32 bytes_remaining;
1533         u8 *data;
1534         int ret = 0;
1535
1536         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1537                 return -EFAULT;
1538
1539         /* Check for wrap and zero */
1540         if (eeprom.offset + eeprom.len <= eeprom.offset)
1541                 return -EINVAL;
1542
1543         /* Check for exceeding total eeprom len */
1544         if (eeprom.offset + eeprom.len > total_len)
1545                 return -EINVAL;
1546
1547         data = kzalloc(PAGE_SIZE, GFP_USER);
1548         if (!data)
1549                 return -ENOMEM;
1550
1551         bytes_remaining = eeprom.len;
1552         while (bytes_remaining > 0) {
1553                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1554
1555                 ret = getter(dev, &eeprom, data);
1556                 if (ret)
1557                         break;
1558                 if (!eeprom.len) {
1559                         ret = -EIO;
1560                         break;
1561                 }
1562                 if (copy_to_user(userbuf, data, eeprom.len)) {
1563                         ret = -EFAULT;
1564                         break;
1565                 }
1566                 userbuf += eeprom.len;
1567                 eeprom.offset += eeprom.len;
1568                 bytes_remaining -= eeprom.len;
1569         }
1570
1571         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1572         eeprom.offset -= eeprom.len;
1573         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1574                 ret = -EFAULT;
1575
1576         kfree(data);
1577         return ret;
1578 }
1579
1580 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1581 {
1582         const struct ethtool_ops *ops = dev->ethtool_ops;
1583
1584         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1585             !ops->get_eeprom_len(dev))
1586                 return -EOPNOTSUPP;
1587
1588         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1589                                       ops->get_eeprom_len(dev));
1590 }
1591
1592 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1593 {
1594         struct ethtool_eeprom eeprom;
1595         const struct ethtool_ops *ops = dev->ethtool_ops;
1596         void __user *userbuf = useraddr + sizeof(eeprom);
1597         u32 bytes_remaining;
1598         u8 *data;
1599         int ret = 0;
1600
1601         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1602             !ops->get_eeprom_len(dev))
1603                 return -EOPNOTSUPP;
1604
1605         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1606                 return -EFAULT;
1607
1608         /* Check for wrap and zero */
1609         if (eeprom.offset + eeprom.len <= eeprom.offset)
1610                 return -EINVAL;
1611
1612         /* Check for exceeding total eeprom len */
1613         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1614                 return -EINVAL;
1615
1616         data = kzalloc(PAGE_SIZE, GFP_USER);
1617         if (!data)
1618                 return -ENOMEM;
1619
1620         bytes_remaining = eeprom.len;
1621         while (bytes_remaining > 0) {
1622                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1623
1624                 if (copy_from_user(data, userbuf, eeprom.len)) {
1625                         ret = -EFAULT;
1626                         break;
1627                 }
1628                 ret = ops->set_eeprom(dev, &eeprom, data);
1629                 if (ret)
1630                         break;
1631                 userbuf += eeprom.len;
1632                 eeprom.offset += eeprom.len;
1633                 bytes_remaining -= eeprom.len;
1634         }
1635
1636         kfree(data);
1637         return ret;
1638 }
1639
1640 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1641                                                    void __user *useraddr)
1642 {
1643         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1644         struct kernel_ethtool_coalesce kernel_coalesce = {};
1645         int ret;
1646
1647         if (!dev->ethtool_ops->get_coalesce)
1648                 return -EOPNOTSUPP;
1649
1650         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1651                                              NULL);
1652         if (ret)
1653                 return ret;
1654
1655         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1656                 return -EFAULT;
1657         return 0;
1658 }
1659
1660 static bool
1661 ethtool_set_coalesce_supported(struct net_device *dev,
1662                                struct ethtool_coalesce *coalesce)
1663 {
1664         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1665         u32 nonzero_params = 0;
1666
1667         if (coalesce->rx_coalesce_usecs)
1668                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1669         if (coalesce->rx_max_coalesced_frames)
1670                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1671         if (coalesce->rx_coalesce_usecs_irq)
1672                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1673         if (coalesce->rx_max_coalesced_frames_irq)
1674                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1675         if (coalesce->tx_coalesce_usecs)
1676                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1677         if (coalesce->tx_max_coalesced_frames)
1678                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1679         if (coalesce->tx_coalesce_usecs_irq)
1680                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1681         if (coalesce->tx_max_coalesced_frames_irq)
1682                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1683         if (coalesce->stats_block_coalesce_usecs)
1684                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1685         if (coalesce->use_adaptive_rx_coalesce)
1686                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1687         if (coalesce->use_adaptive_tx_coalesce)
1688                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1689         if (coalesce->pkt_rate_low)
1690                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1691         if (coalesce->rx_coalesce_usecs_low)
1692                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1693         if (coalesce->rx_max_coalesced_frames_low)
1694                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1695         if (coalesce->tx_coalesce_usecs_low)
1696                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1697         if (coalesce->tx_max_coalesced_frames_low)
1698                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1699         if (coalesce->pkt_rate_high)
1700                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1701         if (coalesce->rx_coalesce_usecs_high)
1702                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1703         if (coalesce->rx_max_coalesced_frames_high)
1704                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1705         if (coalesce->tx_coalesce_usecs_high)
1706                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1707         if (coalesce->tx_max_coalesced_frames_high)
1708                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1709         if (coalesce->rate_sample_interval)
1710                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1711
1712         return (supported_params & nonzero_params) == nonzero_params;
1713 }
1714
1715 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1716                                                    void __user *useraddr)
1717 {
1718         struct kernel_ethtool_coalesce kernel_coalesce = {};
1719         struct ethtool_coalesce coalesce;
1720         int ret;
1721
1722         if (!dev->ethtool_ops->set_coalesce && !dev->ethtool_ops->get_coalesce)
1723                 return -EOPNOTSUPP;
1724
1725         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1726                                              NULL);
1727         if (ret)
1728                 return ret;
1729
1730         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1731                 return -EFAULT;
1732
1733         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1734                 return -EOPNOTSUPP;
1735
1736         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1737                                              NULL);
1738         if (!ret)
1739                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1740         return ret;
1741 }
1742
1743 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1744 {
1745         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1746
1747         if (!dev->ethtool_ops->get_ringparam)
1748                 return -EOPNOTSUPP;
1749
1750         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1751
1752         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1753                 return -EFAULT;
1754         return 0;
1755 }
1756
1757 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1758 {
1759         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1760         int ret;
1761
1762         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1763                 return -EOPNOTSUPP;
1764
1765         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1766                 return -EFAULT;
1767
1768         dev->ethtool_ops->get_ringparam(dev, &max);
1769
1770         /* ensure new ring parameters are within the maximums */
1771         if (ringparam.rx_pending > max.rx_max_pending ||
1772             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1773             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1774             ringparam.tx_pending > max.tx_max_pending)
1775                 return -EINVAL;
1776
1777         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
1778         if (!ret)
1779                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1780         return ret;
1781 }
1782
1783 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1784                                                    void __user *useraddr)
1785 {
1786         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1787
1788         if (!dev->ethtool_ops->get_channels)
1789                 return -EOPNOTSUPP;
1790
1791         dev->ethtool_ops->get_channels(dev, &channels);
1792
1793         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1794                 return -EFAULT;
1795         return 0;
1796 }
1797
1798 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1799                                                    void __user *useraddr)
1800 {
1801         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1802         u16 from_channel, to_channel;
1803         u32 max_rx_in_use = 0;
1804         unsigned int i;
1805         int ret;
1806
1807         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1808                 return -EOPNOTSUPP;
1809
1810         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1811                 return -EFAULT;
1812
1813         dev->ethtool_ops->get_channels(dev, &curr);
1814
1815         if (channels.rx_count == curr.rx_count &&
1816             channels.tx_count == curr.tx_count &&
1817             channels.combined_count == curr.combined_count &&
1818             channels.other_count == curr.other_count)
1819                 return 0;
1820
1821         /* ensure new counts are within the maximums */
1822         if (channels.rx_count > curr.max_rx ||
1823             channels.tx_count > curr.max_tx ||
1824             channels.combined_count > curr.max_combined ||
1825             channels.other_count > curr.max_other)
1826                 return -EINVAL;
1827
1828         /* ensure there is at least one RX and one TX channel */
1829         if (!channels.combined_count &&
1830             (!channels.rx_count || !channels.tx_count))
1831                 return -EINVAL;
1832
1833         /* ensure the new Rx count fits within the configured Rx flow
1834          * indirection table settings */
1835         if (netif_is_rxfh_configured(dev) &&
1836             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1837             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1838             return -EINVAL;
1839
1840         /* Disabling channels, query zero-copy AF_XDP sockets */
1841         from_channel = channels.combined_count +
1842                 min(channels.rx_count, channels.tx_count);
1843         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1844         for (i = from_channel; i < to_channel; i++)
1845                 if (xsk_get_pool_from_qid(dev, i))
1846                         return -EINVAL;
1847
1848         ret = dev->ethtool_ops->set_channels(dev, &channels);
1849         if (!ret)
1850                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1851         return ret;
1852 }
1853
1854 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1855 {
1856         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1857
1858         if (!dev->ethtool_ops->get_pauseparam)
1859                 return -EOPNOTSUPP;
1860
1861         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1862
1863         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1864                 return -EFAULT;
1865         return 0;
1866 }
1867
1868 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1869 {
1870         struct ethtool_pauseparam pauseparam;
1871         int ret;
1872
1873         if (!dev->ethtool_ops->set_pauseparam)
1874                 return -EOPNOTSUPP;
1875
1876         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1877                 return -EFAULT;
1878
1879         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1880         if (!ret)
1881                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1882         return ret;
1883 }
1884
1885 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1886 {
1887         struct ethtool_test test;
1888         const struct ethtool_ops *ops = dev->ethtool_ops;
1889         u64 *data;
1890         int ret, test_len;
1891
1892         if (!ops->self_test || !ops->get_sset_count)
1893                 return -EOPNOTSUPP;
1894
1895         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1896         if (test_len < 0)
1897                 return test_len;
1898         WARN_ON(test_len == 0);
1899
1900         if (copy_from_user(&test, useraddr, sizeof(test)))
1901                 return -EFAULT;
1902
1903         test.len = test_len;
1904         data = kcalloc(test_len, sizeof(u64), GFP_USER);
1905         if (!data)
1906                 return -ENOMEM;
1907
1908         netif_testing_on(dev);
1909         ops->self_test(dev, &test, data);
1910         netif_testing_off(dev);
1911
1912         ret = -EFAULT;
1913         if (copy_to_user(useraddr, &test, sizeof(test)))
1914                 goto out;
1915         useraddr += sizeof(test);
1916         if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
1917                 goto out;
1918         ret = 0;
1919
1920  out:
1921         kfree(data);
1922         return ret;
1923 }
1924
1925 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1926 {
1927         struct ethtool_gstrings gstrings;
1928         u8 *data;
1929         int ret;
1930
1931         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1932                 return -EFAULT;
1933
1934         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1935         if (ret < 0)
1936                 return ret;
1937         if (ret > S32_MAX / ETH_GSTRING_LEN)
1938                 return -ENOMEM;
1939         WARN_ON_ONCE(!ret);
1940
1941         gstrings.len = ret;
1942
1943         if (gstrings.len) {
1944                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1945                 if (!data)
1946                         return -ENOMEM;
1947
1948                 __ethtool_get_strings(dev, gstrings.string_set, data);
1949         } else {
1950                 data = NULL;
1951         }
1952
1953         ret = -EFAULT;
1954         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1955                 goto out;
1956         useraddr += sizeof(gstrings);
1957         if (gstrings.len &&
1958             copy_to_user(useraddr, data,
1959                          array_size(gstrings.len, ETH_GSTRING_LEN)))
1960                 goto out;
1961         ret = 0;
1962
1963 out:
1964         vfree(data);
1965         return ret;
1966 }
1967
1968 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
1969 {
1970         va_list args;
1971
1972         va_start(args, fmt);
1973         vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
1974         va_end(args);
1975
1976         *data += ETH_GSTRING_LEN;
1977 }
1978 EXPORT_SYMBOL(ethtool_sprintf);
1979
1980 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1981 {
1982         struct ethtool_value id;
1983         static bool busy;
1984         const struct ethtool_ops *ops = dev->ethtool_ops;
1985         int rc;
1986
1987         if (!ops->set_phys_id)
1988                 return -EOPNOTSUPP;
1989
1990         if (busy)
1991                 return -EBUSY;
1992
1993         if (copy_from_user(&id, useraddr, sizeof(id)))
1994                 return -EFAULT;
1995
1996         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1997         if (rc < 0)
1998                 return rc;
1999
2000         /* Drop the RTNL lock while waiting, but prevent reentry or
2001          * removal of the device.
2002          */
2003         busy = true;
2004         dev_hold(dev);
2005         rtnl_unlock();
2006
2007         if (rc == 0) {
2008                 /* Driver will handle this itself */
2009                 schedule_timeout_interruptible(
2010                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2011         } else {
2012                 /* Driver expects to be called at twice the frequency in rc */
2013                 int n = rc * 2, interval = HZ / n;
2014                 u64 count = n * id.data, i = 0;
2015
2016                 do {
2017                         rtnl_lock();
2018                         rc = ops->set_phys_id(dev,
2019                                     (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2020                         rtnl_unlock();
2021                         if (rc)
2022                                 break;
2023                         schedule_timeout_interruptible(interval);
2024                 } while (!signal_pending(current) && (!id.data || i < count));
2025         }
2026
2027         rtnl_lock();
2028         dev_put(dev);
2029         busy = false;
2030
2031         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2032         return rc;
2033 }
2034
2035 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2036 {
2037         struct ethtool_stats stats;
2038         const struct ethtool_ops *ops = dev->ethtool_ops;
2039         u64 *data;
2040         int ret, n_stats;
2041
2042         if (!ops->get_ethtool_stats || !ops->get_sset_count)
2043                 return -EOPNOTSUPP;
2044
2045         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2046         if (n_stats < 0)
2047                 return n_stats;
2048         if (n_stats > S32_MAX / sizeof(u64))
2049                 return -ENOMEM;
2050         WARN_ON_ONCE(!n_stats);
2051         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2052                 return -EFAULT;
2053
2054         stats.n_stats = n_stats;
2055
2056         if (n_stats) {
2057                 data = vzalloc(array_size(n_stats, sizeof(u64)));
2058                 if (!data)
2059                         return -ENOMEM;
2060                 ops->get_ethtool_stats(dev, &stats, data);
2061         } else {
2062                 data = NULL;
2063         }
2064
2065         ret = -EFAULT;
2066         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2067                 goto out;
2068         useraddr += sizeof(stats);
2069         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2070                 goto out;
2071         ret = 0;
2072
2073  out:
2074         vfree(data);
2075         return ret;
2076 }
2077
2078 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2079 {
2080         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2081         const struct ethtool_ops *ops = dev->ethtool_ops;
2082         struct phy_device *phydev = dev->phydev;
2083         struct ethtool_stats stats;
2084         u64 *data;
2085         int ret, n_stats;
2086
2087         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
2088                 return -EOPNOTSUPP;
2089
2090         if (dev->phydev && !ops->get_ethtool_phy_stats &&
2091             phy_ops && phy_ops->get_sset_count)
2092                 n_stats = phy_ops->get_sset_count(dev->phydev);
2093         else
2094                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2095         if (n_stats < 0)
2096                 return n_stats;
2097         if (n_stats > S32_MAX / sizeof(u64))
2098                 return -ENOMEM;
2099         WARN_ON_ONCE(!n_stats);
2100
2101         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2102                 return -EFAULT;
2103
2104         stats.n_stats = n_stats;
2105
2106         if (n_stats) {
2107                 data = vzalloc(array_size(n_stats, sizeof(u64)));
2108                 if (!data)
2109                         return -ENOMEM;
2110
2111                 if (dev->phydev && !ops->get_ethtool_phy_stats &&
2112                     phy_ops && phy_ops->get_stats) {
2113                         ret = phy_ops->get_stats(dev->phydev, &stats, data);
2114                         if (ret < 0)
2115                                 goto out;
2116                 } else {
2117                         ops->get_ethtool_phy_stats(dev, &stats, data);
2118                 }
2119         } else {
2120                 data = NULL;
2121         }
2122
2123         ret = -EFAULT;
2124         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2125                 goto out;
2126         useraddr += sizeof(stats);
2127         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2128                 goto out;
2129         ret = 0;
2130
2131  out:
2132         vfree(data);
2133         return ret;
2134 }
2135
2136 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2137 {
2138         struct ethtool_perm_addr epaddr;
2139
2140         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2141                 return -EFAULT;
2142
2143         if (epaddr.size < dev->addr_len)
2144                 return -ETOOSMALL;
2145         epaddr.size = dev->addr_len;
2146
2147         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2148                 return -EFAULT;
2149         useraddr += sizeof(epaddr);
2150         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2151                 return -EFAULT;
2152         return 0;
2153 }
2154
2155 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2156                              u32 cmd, u32 (*actor)(struct net_device *))
2157 {
2158         struct ethtool_value edata = { .cmd = cmd };
2159
2160         if (!actor)
2161                 return -EOPNOTSUPP;
2162
2163         edata.data = actor(dev);
2164
2165         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2166                 return -EFAULT;
2167         return 0;
2168 }
2169
2170 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2171                              void (*actor)(struct net_device *, u32))
2172 {
2173         struct ethtool_value edata;
2174
2175         if (!actor)
2176                 return -EOPNOTSUPP;
2177
2178         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2179                 return -EFAULT;
2180
2181         actor(dev, edata.data);
2182         return 0;
2183 }
2184
2185 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2186                              int (*actor)(struct net_device *, u32))
2187 {
2188         struct ethtool_value edata;
2189
2190         if (!actor)
2191                 return -EOPNOTSUPP;
2192
2193         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2194                 return -EFAULT;
2195
2196         return actor(dev, edata.data);
2197 }
2198
2199 static int
2200 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2201 {
2202         if (!dev->ethtool_ops->flash_device) {
2203                 req->devlink = netdev_to_devlink_get(dev);
2204                 return 0;
2205         }
2206
2207         return dev->ethtool_ops->flash_device(dev, &req->efl);
2208 }
2209
2210 static int ethtool_set_dump(struct net_device *dev,
2211                         void __user *useraddr)
2212 {
2213         struct ethtool_dump dump;
2214
2215         if (!dev->ethtool_ops->set_dump)
2216                 return -EOPNOTSUPP;
2217
2218         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2219                 return -EFAULT;
2220
2221         return dev->ethtool_ops->set_dump(dev, &dump);
2222 }
2223
2224 static int ethtool_get_dump_flag(struct net_device *dev,
2225                                 void __user *useraddr)
2226 {
2227         int ret;
2228         struct ethtool_dump dump;
2229         const struct ethtool_ops *ops = dev->ethtool_ops;
2230
2231         if (!ops->get_dump_flag)
2232                 return -EOPNOTSUPP;
2233
2234         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2235                 return -EFAULT;
2236
2237         ret = ops->get_dump_flag(dev, &dump);
2238         if (ret)
2239                 return ret;
2240
2241         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2242                 return -EFAULT;
2243         return 0;
2244 }
2245
2246 static int ethtool_get_dump_data(struct net_device *dev,
2247                                 void __user *useraddr)
2248 {
2249         int ret;
2250         __u32 len;
2251         struct ethtool_dump dump, tmp;
2252         const struct ethtool_ops *ops = dev->ethtool_ops;
2253         void *data = NULL;
2254
2255         if (!ops->get_dump_data || !ops->get_dump_flag)
2256                 return -EOPNOTSUPP;
2257
2258         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2259                 return -EFAULT;
2260
2261         memset(&tmp, 0, sizeof(tmp));
2262         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2263         ret = ops->get_dump_flag(dev, &tmp);
2264         if (ret)
2265                 return ret;
2266
2267         len = min(tmp.len, dump.len);
2268         if (!len)
2269                 return -EFAULT;
2270
2271         /* Don't ever let the driver think there's more space available
2272          * than it requested with .get_dump_flag().
2273          */
2274         dump.len = len;
2275
2276         /* Always allocate enough space to hold the whole thing so that the
2277          * driver does not need to check the length and bother with partial
2278          * dumping.
2279          */
2280         data = vzalloc(tmp.len);
2281         if (!data)
2282                 return -ENOMEM;
2283         ret = ops->get_dump_data(dev, &dump, data);
2284         if (ret)
2285                 goto out;
2286
2287         /* There are two sane possibilities:
2288          * 1. The driver's .get_dump_data() does not touch dump.len.
2289          * 2. Or it may set dump.len to how much it really writes, which
2290          *    should be tmp.len (or len if it can do a partial dump).
2291          * In any case respond to userspace with the actual length of data
2292          * it's receiving.
2293          */
2294         WARN_ON(dump.len != len && dump.len != tmp.len);
2295         dump.len = len;
2296
2297         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2298                 ret = -EFAULT;
2299                 goto out;
2300         }
2301         useraddr += offsetof(struct ethtool_dump, data);
2302         if (copy_to_user(useraddr, data, len))
2303                 ret = -EFAULT;
2304 out:
2305         vfree(data);
2306         return ret;
2307 }
2308
2309 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2310 {
2311         struct ethtool_ts_info info;
2312         int err;
2313
2314         err = __ethtool_get_ts_info(dev, &info);
2315         if (err)
2316                 return err;
2317
2318         if (copy_to_user(useraddr, &info, sizeof(info)))
2319                 return -EFAULT;
2320
2321         return 0;
2322 }
2323
2324 int ethtool_get_module_info_call(struct net_device *dev,
2325                                  struct ethtool_modinfo *modinfo)
2326 {
2327         const struct ethtool_ops *ops = dev->ethtool_ops;
2328         struct phy_device *phydev = dev->phydev;
2329
2330         if (dev->sfp_bus)
2331                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2332
2333         if (phydev && phydev->drv && phydev->drv->module_info)
2334                 return phydev->drv->module_info(phydev, modinfo);
2335
2336         if (ops->get_module_info)
2337                 return ops->get_module_info(dev, modinfo);
2338
2339         return -EOPNOTSUPP;
2340 }
2341
2342 static int ethtool_get_module_info(struct net_device *dev,
2343                                    void __user *useraddr)
2344 {
2345         int ret;
2346         struct ethtool_modinfo modinfo;
2347
2348         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2349                 return -EFAULT;
2350
2351         ret = ethtool_get_module_info_call(dev, &modinfo);
2352         if (ret)
2353                 return ret;
2354
2355         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2356                 return -EFAULT;
2357
2358         return 0;
2359 }
2360
2361 int ethtool_get_module_eeprom_call(struct net_device *dev,
2362                                    struct ethtool_eeprom *ee, u8 *data)
2363 {
2364         const struct ethtool_ops *ops = dev->ethtool_ops;
2365         struct phy_device *phydev = dev->phydev;
2366
2367         if (dev->sfp_bus)
2368                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2369
2370         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2371                 return phydev->drv->module_eeprom(phydev, ee, data);
2372
2373         if (ops->get_module_eeprom)
2374                 return ops->get_module_eeprom(dev, ee, data);
2375
2376         return -EOPNOTSUPP;
2377 }
2378
2379 static int ethtool_get_module_eeprom(struct net_device *dev,
2380                                      void __user *useraddr)
2381 {
2382         int ret;
2383         struct ethtool_modinfo modinfo;
2384
2385         ret = ethtool_get_module_info_call(dev, &modinfo);
2386         if (ret)
2387                 return ret;
2388
2389         return ethtool_get_any_eeprom(dev, useraddr,
2390                                       ethtool_get_module_eeprom_call,
2391                                       modinfo.eeprom_len);
2392 }
2393
2394 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2395 {
2396         switch (tuna->id) {
2397         case ETHTOOL_RX_COPYBREAK:
2398         case ETHTOOL_TX_COPYBREAK:
2399                 if (tuna->len != sizeof(u32) ||
2400                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2401                         return -EINVAL;
2402                 break;
2403         case ETHTOOL_PFC_PREVENTION_TOUT:
2404                 if (tuna->len != sizeof(u16) ||
2405                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2406                         return -EINVAL;
2407                 break;
2408         default:
2409                 return -EINVAL;
2410         }
2411
2412         return 0;
2413 }
2414
2415 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2416 {
2417         int ret;
2418         struct ethtool_tunable tuna;
2419         const struct ethtool_ops *ops = dev->ethtool_ops;
2420         void *data;
2421
2422         if (!ops->get_tunable)
2423                 return -EOPNOTSUPP;
2424         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2425                 return -EFAULT;
2426         ret = ethtool_tunable_valid(&tuna);
2427         if (ret)
2428                 return ret;
2429         data = kzalloc(tuna.len, GFP_USER);
2430         if (!data)
2431                 return -ENOMEM;
2432         ret = ops->get_tunable(dev, &tuna, data);
2433         if (ret)
2434                 goto out;
2435         useraddr += sizeof(tuna);
2436         ret = -EFAULT;
2437         if (copy_to_user(useraddr, data, tuna.len))
2438                 goto out;
2439         ret = 0;
2440
2441 out:
2442         kfree(data);
2443         return ret;
2444 }
2445
2446 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2447 {
2448         int ret;
2449         struct ethtool_tunable tuna;
2450         const struct ethtool_ops *ops = dev->ethtool_ops;
2451         void *data;
2452
2453         if (!ops->set_tunable)
2454                 return -EOPNOTSUPP;
2455         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2456                 return -EFAULT;
2457         ret = ethtool_tunable_valid(&tuna);
2458         if (ret)
2459                 return ret;
2460         useraddr += sizeof(tuna);
2461         data = memdup_user(useraddr, tuna.len);
2462         if (IS_ERR(data))
2463                 return PTR_ERR(data);
2464         ret = ops->set_tunable(dev, &tuna, data);
2465
2466         kfree(data);
2467         return ret;
2468 }
2469
2470 static noinline_for_stack int
2471 ethtool_get_per_queue_coalesce(struct net_device *dev,
2472                                void __user *useraddr,
2473                                struct ethtool_per_queue_op *per_queue_opt)
2474 {
2475         u32 bit;
2476         int ret;
2477         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2478
2479         if (!dev->ethtool_ops->get_per_queue_coalesce)
2480                 return -EOPNOTSUPP;
2481
2482         useraddr += sizeof(*per_queue_opt);
2483
2484         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2485                           MAX_NUM_QUEUE);
2486
2487         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2488                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2489
2490                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2491                 if (ret != 0)
2492                         return ret;
2493                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2494                         return -EFAULT;
2495                 useraddr += sizeof(coalesce);
2496         }
2497
2498         return 0;
2499 }
2500
2501 static noinline_for_stack int
2502 ethtool_set_per_queue_coalesce(struct net_device *dev,
2503                                void __user *useraddr,
2504                                struct ethtool_per_queue_op *per_queue_opt)
2505 {
2506         u32 bit;
2507         int i, ret = 0;
2508         int n_queue;
2509         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2510         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2511
2512         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2513             (!dev->ethtool_ops->get_per_queue_coalesce))
2514                 return -EOPNOTSUPP;
2515
2516         useraddr += sizeof(*per_queue_opt);
2517
2518         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2519         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2520         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2521         if (!backup)
2522                 return -ENOMEM;
2523
2524         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2525                 struct ethtool_coalesce coalesce;
2526
2527                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2528                 if (ret != 0)
2529                         goto roll_back;
2530
2531                 tmp++;
2532
2533                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2534                         ret = -EFAULT;
2535                         goto roll_back;
2536                 }
2537
2538                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2539                         ret = -EOPNOTSUPP;
2540                         goto roll_back;
2541                 }
2542
2543                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2544                 if (ret != 0)
2545                         goto roll_back;
2546
2547                 useraddr += sizeof(coalesce);
2548         }
2549
2550 roll_back:
2551         if (ret != 0) {
2552                 tmp = backup;
2553                 for_each_set_bit(i, queue_mask, bit) {
2554                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2555                         tmp++;
2556                 }
2557         }
2558         kfree(backup);
2559
2560         return ret;
2561 }
2562
2563 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2564                                  void __user *useraddr, u32 sub_cmd)
2565 {
2566         struct ethtool_per_queue_op per_queue_opt;
2567
2568         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2569                 return -EFAULT;
2570
2571         if (per_queue_opt.sub_command != sub_cmd)
2572                 return -EINVAL;
2573
2574         switch (per_queue_opt.sub_command) {
2575         case ETHTOOL_GCOALESCE:
2576                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2577         case ETHTOOL_SCOALESCE:
2578                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2579         default:
2580                 return -EOPNOTSUPP;
2581         }
2582 }
2583
2584 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2585 {
2586         switch (tuna->id) {
2587         case ETHTOOL_PHY_DOWNSHIFT:
2588         case ETHTOOL_PHY_FAST_LINK_DOWN:
2589                 if (tuna->len != sizeof(u8) ||
2590                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2591                         return -EINVAL;
2592                 break;
2593         case ETHTOOL_PHY_EDPD:
2594                 if (tuna->len != sizeof(u16) ||
2595                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2596                         return -EINVAL;
2597                 break;
2598         default:
2599                 return -EINVAL;
2600         }
2601
2602         return 0;
2603 }
2604
2605 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2606 {
2607         struct phy_device *phydev = dev->phydev;
2608         struct ethtool_tunable tuna;
2609         bool phy_drv_tunable;
2610         void *data;
2611         int ret;
2612
2613         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2614         if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2615                 return -EOPNOTSUPP;
2616         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2617                 return -EFAULT;
2618         ret = ethtool_phy_tunable_valid(&tuna);
2619         if (ret)
2620                 return ret;
2621         data = kzalloc(tuna.len, GFP_USER);
2622         if (!data)
2623                 return -ENOMEM;
2624         if (phy_drv_tunable) {
2625                 mutex_lock(&phydev->lock);
2626                 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2627                 mutex_unlock(&phydev->lock);
2628         } else {
2629                 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2630         }
2631         if (ret)
2632                 goto out;
2633         useraddr += sizeof(tuna);
2634         ret = -EFAULT;
2635         if (copy_to_user(useraddr, data, tuna.len))
2636                 goto out;
2637         ret = 0;
2638
2639 out:
2640         kfree(data);
2641         return ret;
2642 }
2643
2644 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2645 {
2646         struct phy_device *phydev = dev->phydev;
2647         struct ethtool_tunable tuna;
2648         bool phy_drv_tunable;
2649         void *data;
2650         int ret;
2651
2652         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2653         if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2654                 return -EOPNOTSUPP;
2655         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2656                 return -EFAULT;
2657         ret = ethtool_phy_tunable_valid(&tuna);
2658         if (ret)
2659                 return ret;
2660         useraddr += sizeof(tuna);
2661         data = memdup_user(useraddr, tuna.len);
2662         if (IS_ERR(data))
2663                 return PTR_ERR(data);
2664         if (phy_drv_tunable) {
2665                 mutex_lock(&phydev->lock);
2666                 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2667                 mutex_unlock(&phydev->lock);
2668         } else {
2669                 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2670         }
2671
2672         kfree(data);
2673         return ret;
2674 }
2675
2676 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2677 {
2678         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2679         int rc;
2680
2681         if (!dev->ethtool_ops->get_fecparam)
2682                 return -EOPNOTSUPP;
2683
2684         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2685         if (rc)
2686                 return rc;
2687
2688         if (WARN_ON_ONCE(fecparam.reserved))
2689                 fecparam.reserved = 0;
2690
2691         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2692                 return -EFAULT;
2693         return 0;
2694 }
2695
2696 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2697 {
2698         struct ethtool_fecparam fecparam;
2699
2700         if (!dev->ethtool_ops->set_fecparam)
2701                 return -EOPNOTSUPP;
2702
2703         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2704                 return -EFAULT;
2705
2706         if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2707                 return -EINVAL;
2708
2709         fecparam.active_fec = 0;
2710         fecparam.reserved = 0;
2711
2712         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2713 }
2714
2715 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2716
2717 static int
2718 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2719               u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2720 {
2721         struct net_device *dev;
2722         u32 sub_cmd;
2723         int rc;
2724         netdev_features_t old_features;
2725
2726         dev = __dev_get_by_name(net, ifr->ifr_name);
2727         if (!dev)
2728                 return -ENODEV;
2729
2730         if (ethcmd == ETHTOOL_PERQUEUE) {
2731                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2732                         return -EFAULT;
2733         } else {
2734                 sub_cmd = ethcmd;
2735         }
2736         /* Allow some commands to be done by anyone */
2737         switch (sub_cmd) {
2738         case ETHTOOL_GSET:
2739         case ETHTOOL_GDRVINFO:
2740         case ETHTOOL_GMSGLVL:
2741         case ETHTOOL_GLINK:
2742         case ETHTOOL_GCOALESCE:
2743         case ETHTOOL_GRINGPARAM:
2744         case ETHTOOL_GPAUSEPARAM:
2745         case ETHTOOL_GRXCSUM:
2746         case ETHTOOL_GTXCSUM:
2747         case ETHTOOL_GSG:
2748         case ETHTOOL_GSSET_INFO:
2749         case ETHTOOL_GSTRINGS:
2750         case ETHTOOL_GSTATS:
2751         case ETHTOOL_GPHYSTATS:
2752         case ETHTOOL_GTSO:
2753         case ETHTOOL_GPERMADDR:
2754         case ETHTOOL_GUFO:
2755         case ETHTOOL_GGSO:
2756         case ETHTOOL_GGRO:
2757         case ETHTOOL_GFLAGS:
2758         case ETHTOOL_GPFLAGS:
2759         case ETHTOOL_GRXFH:
2760         case ETHTOOL_GRXRINGS:
2761         case ETHTOOL_GRXCLSRLCNT:
2762         case ETHTOOL_GRXCLSRULE:
2763         case ETHTOOL_GRXCLSRLALL:
2764         case ETHTOOL_GRXFHINDIR:
2765         case ETHTOOL_GRSSH:
2766         case ETHTOOL_GFEATURES:
2767         case ETHTOOL_GCHANNELS:
2768         case ETHTOOL_GET_TS_INFO:
2769         case ETHTOOL_GEEE:
2770         case ETHTOOL_GTUNABLE:
2771         case ETHTOOL_PHY_GTUNABLE:
2772         case ETHTOOL_GLINKSETTINGS:
2773         case ETHTOOL_GFECPARAM:
2774                 break;
2775         default:
2776                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2777                         return -EPERM;
2778         }
2779
2780         if (dev->dev.parent)
2781                 pm_runtime_get_sync(dev->dev.parent);
2782
2783         if (!netif_device_present(dev)) {
2784                 rc = -ENODEV;
2785                 goto out;
2786         }
2787
2788         if (dev->ethtool_ops->begin) {
2789                 rc = dev->ethtool_ops->begin(dev);
2790                 if (rc < 0)
2791                         goto out;
2792         }
2793         old_features = dev->features;
2794
2795         switch (ethcmd) {
2796         case ETHTOOL_GSET:
2797                 rc = ethtool_get_settings(dev, useraddr);
2798                 break;
2799         case ETHTOOL_SSET:
2800                 rc = ethtool_set_settings(dev, useraddr);
2801                 break;
2802         case ETHTOOL_GDRVINFO:
2803                 rc = ethtool_get_drvinfo(dev, devlink_state);
2804                 break;
2805         case ETHTOOL_GREGS:
2806                 rc = ethtool_get_regs(dev, useraddr);
2807                 break;
2808         case ETHTOOL_GWOL:
2809                 rc = ethtool_get_wol(dev, useraddr);
2810                 break;
2811         case ETHTOOL_SWOL:
2812                 rc = ethtool_set_wol(dev, useraddr);
2813                 break;
2814         case ETHTOOL_GMSGLVL:
2815                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2816                                        dev->ethtool_ops->get_msglevel);
2817                 break;
2818         case ETHTOOL_SMSGLVL:
2819                 rc = ethtool_set_value_void(dev, useraddr,
2820                                        dev->ethtool_ops->set_msglevel);
2821                 if (!rc)
2822                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2823                 break;
2824         case ETHTOOL_GEEE:
2825                 rc = ethtool_get_eee(dev, useraddr);
2826                 break;
2827         case ETHTOOL_SEEE:
2828                 rc = ethtool_set_eee(dev, useraddr);
2829                 break;
2830         case ETHTOOL_NWAY_RST:
2831                 rc = ethtool_nway_reset(dev);
2832                 break;
2833         case ETHTOOL_GLINK:
2834                 rc = ethtool_get_link(dev, useraddr);
2835                 break;
2836         case ETHTOOL_GEEPROM:
2837                 rc = ethtool_get_eeprom(dev, useraddr);
2838                 break;
2839         case ETHTOOL_SEEPROM:
2840                 rc = ethtool_set_eeprom(dev, useraddr);
2841                 break;
2842         case ETHTOOL_GCOALESCE:
2843                 rc = ethtool_get_coalesce(dev, useraddr);
2844                 break;
2845         case ETHTOOL_SCOALESCE:
2846                 rc = ethtool_set_coalesce(dev, useraddr);
2847                 break;
2848         case ETHTOOL_GRINGPARAM:
2849                 rc = ethtool_get_ringparam(dev, useraddr);
2850                 break;
2851         case ETHTOOL_SRINGPARAM:
2852                 rc = ethtool_set_ringparam(dev, useraddr);
2853                 break;
2854         case ETHTOOL_GPAUSEPARAM:
2855                 rc = ethtool_get_pauseparam(dev, useraddr);
2856                 break;
2857         case ETHTOOL_SPAUSEPARAM:
2858                 rc = ethtool_set_pauseparam(dev, useraddr);
2859                 break;
2860         case ETHTOOL_TEST:
2861                 rc = ethtool_self_test(dev, useraddr);
2862                 break;
2863         case ETHTOOL_GSTRINGS:
2864                 rc = ethtool_get_strings(dev, useraddr);
2865                 break;
2866         case ETHTOOL_PHYS_ID:
2867                 rc = ethtool_phys_id(dev, useraddr);
2868                 break;
2869         case ETHTOOL_GSTATS:
2870                 rc = ethtool_get_stats(dev, useraddr);
2871                 break;
2872         case ETHTOOL_GPERMADDR:
2873                 rc = ethtool_get_perm_addr(dev, useraddr);
2874                 break;
2875         case ETHTOOL_GFLAGS:
2876                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2877                                         __ethtool_get_flags);
2878                 break;
2879         case ETHTOOL_SFLAGS:
2880                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2881                 break;
2882         case ETHTOOL_GPFLAGS:
2883                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2884                                        dev->ethtool_ops->get_priv_flags);
2885                 if (!rc)
2886                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2887                 break;
2888         case ETHTOOL_SPFLAGS:
2889                 rc = ethtool_set_value(dev, useraddr,
2890                                        dev->ethtool_ops->set_priv_flags);
2891                 break;
2892         case ETHTOOL_GRXFH:
2893         case ETHTOOL_GRXRINGS:
2894         case ETHTOOL_GRXCLSRLCNT:
2895         case ETHTOOL_GRXCLSRULE:
2896         case ETHTOOL_GRXCLSRLALL:
2897                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2898                 break;
2899         case ETHTOOL_SRXFH:
2900         case ETHTOOL_SRXCLSRLDEL:
2901         case ETHTOOL_SRXCLSRLINS:
2902                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2903                 break;
2904         case ETHTOOL_FLASHDEV:
2905                 rc = ethtool_flash_device(dev, devlink_state);
2906                 break;
2907         case ETHTOOL_RESET:
2908                 rc = ethtool_reset(dev, useraddr);
2909                 break;
2910         case ETHTOOL_GSSET_INFO:
2911                 rc = ethtool_get_sset_info(dev, useraddr);
2912                 break;
2913         case ETHTOOL_GRXFHINDIR:
2914                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2915                 break;
2916         case ETHTOOL_SRXFHINDIR:
2917                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2918                 break;
2919         case ETHTOOL_GRSSH:
2920                 rc = ethtool_get_rxfh(dev, useraddr);
2921                 break;
2922         case ETHTOOL_SRSSH:
2923                 rc = ethtool_set_rxfh(dev, useraddr);
2924                 break;
2925         case ETHTOOL_GFEATURES:
2926                 rc = ethtool_get_features(dev, useraddr);
2927                 break;
2928         case ETHTOOL_SFEATURES:
2929                 rc = ethtool_set_features(dev, useraddr);
2930                 break;
2931         case ETHTOOL_GTXCSUM:
2932         case ETHTOOL_GRXCSUM:
2933         case ETHTOOL_GSG:
2934         case ETHTOOL_GTSO:
2935         case ETHTOOL_GGSO:
2936         case ETHTOOL_GGRO:
2937                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2938                 break;
2939         case ETHTOOL_STXCSUM:
2940         case ETHTOOL_SRXCSUM:
2941         case ETHTOOL_SSG:
2942         case ETHTOOL_STSO:
2943         case ETHTOOL_SGSO:
2944         case ETHTOOL_SGRO:
2945                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2946                 break;
2947         case ETHTOOL_GCHANNELS:
2948                 rc = ethtool_get_channels(dev, useraddr);
2949                 break;
2950         case ETHTOOL_SCHANNELS:
2951                 rc = ethtool_set_channels(dev, useraddr);
2952                 break;
2953         case ETHTOOL_SET_DUMP:
2954                 rc = ethtool_set_dump(dev, useraddr);
2955                 break;
2956         case ETHTOOL_GET_DUMP_FLAG:
2957                 rc = ethtool_get_dump_flag(dev, useraddr);
2958                 break;
2959         case ETHTOOL_GET_DUMP_DATA:
2960                 rc = ethtool_get_dump_data(dev, useraddr);
2961                 break;
2962         case ETHTOOL_GET_TS_INFO:
2963                 rc = ethtool_get_ts_info(dev, useraddr);
2964                 break;
2965         case ETHTOOL_GMODULEINFO:
2966                 rc = ethtool_get_module_info(dev, useraddr);
2967                 break;
2968         case ETHTOOL_GMODULEEEPROM:
2969                 rc = ethtool_get_module_eeprom(dev, useraddr);
2970                 break;
2971         case ETHTOOL_GTUNABLE:
2972                 rc = ethtool_get_tunable(dev, useraddr);
2973                 break;
2974         case ETHTOOL_STUNABLE:
2975                 rc = ethtool_set_tunable(dev, useraddr);
2976                 break;
2977         case ETHTOOL_GPHYSTATS:
2978                 rc = ethtool_get_phy_stats(dev, useraddr);
2979                 break;
2980         case ETHTOOL_PERQUEUE:
2981                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2982                 break;
2983         case ETHTOOL_GLINKSETTINGS:
2984                 rc = ethtool_get_link_ksettings(dev, useraddr);
2985                 break;
2986         case ETHTOOL_SLINKSETTINGS:
2987                 rc = ethtool_set_link_ksettings(dev, useraddr);
2988                 break;
2989         case ETHTOOL_PHY_GTUNABLE:
2990                 rc = get_phy_tunable(dev, useraddr);
2991                 break;
2992         case ETHTOOL_PHY_STUNABLE:
2993                 rc = set_phy_tunable(dev, useraddr);
2994                 break;
2995         case ETHTOOL_GFECPARAM:
2996                 rc = ethtool_get_fecparam(dev, useraddr);
2997                 break;
2998         case ETHTOOL_SFECPARAM:
2999                 rc = ethtool_set_fecparam(dev, useraddr);
3000                 break;
3001         default:
3002                 rc = -EOPNOTSUPP;
3003         }
3004
3005         if (dev->ethtool_ops->complete)
3006                 dev->ethtool_ops->complete(dev);
3007
3008         if (old_features != dev->features)
3009                 netdev_features_change(dev);
3010 out:
3011         if (dev->dev.parent)
3012                 pm_runtime_put(dev->dev.parent);
3013
3014         return rc;
3015 }
3016
3017 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3018 {
3019         struct ethtool_devlink_compat *state;
3020         u32 ethcmd;
3021         int rc;
3022
3023         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3024                 return -EFAULT;
3025
3026         state = kzalloc(sizeof(*state), GFP_KERNEL);
3027         if (!state)
3028                 return -ENOMEM;
3029
3030         switch (ethcmd) {
3031         case ETHTOOL_FLASHDEV:
3032                 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3033                         rc = -EFAULT;
3034                         goto exit_free;
3035                 }
3036                 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3037                 break;
3038         }
3039
3040         rtnl_lock();
3041         rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3042         rtnl_unlock();
3043         if (rc)
3044                 goto exit_free;
3045
3046         switch (ethcmd) {
3047         case ETHTOOL_FLASHDEV:
3048                 if (state->devlink)
3049                         rc = devlink_compat_flash_update(state->devlink,
3050                                                          state->efl.data);
3051                 break;
3052         case ETHTOOL_GDRVINFO:
3053                 if (state->devlink)
3054                         devlink_compat_running_version(state->devlink,
3055                                                        state->info.fw_version,
3056                                                        sizeof(state->info.fw_version));
3057                 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3058                         rc = -EFAULT;
3059                         goto exit_free;
3060                 }
3061                 break;
3062         }
3063
3064 exit_free:
3065         if (state->devlink)
3066                 devlink_put(state->devlink);
3067         kfree(state);
3068         return rc;
3069 }
3070
3071 struct ethtool_rx_flow_key {
3072         struct flow_dissector_key_basic                 basic;
3073         union {
3074                 struct flow_dissector_key_ipv4_addrs    ipv4;
3075                 struct flow_dissector_key_ipv6_addrs    ipv6;
3076         };
3077         struct flow_dissector_key_ports                 tp;
3078         struct flow_dissector_key_ip                    ip;
3079         struct flow_dissector_key_vlan                  vlan;
3080         struct flow_dissector_key_eth_addrs             eth_addrs;
3081 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3082
3083 struct ethtool_rx_flow_match {
3084         struct flow_dissector           dissector;
3085         struct ethtool_rx_flow_key      key;
3086         struct ethtool_rx_flow_key      mask;
3087 };
3088
3089 struct ethtool_rx_flow_rule *
3090 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3091 {
3092         const struct ethtool_rx_flow_spec *fs = input->fs;
3093         static struct in6_addr zero_addr = {};
3094         struct ethtool_rx_flow_match *match;
3095         struct ethtool_rx_flow_rule *flow;
3096         struct flow_action_entry *act;
3097
3098         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3099                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3100         if (!flow)
3101                 return ERR_PTR(-ENOMEM);
3102
3103         /* ethtool_rx supports only one single action per rule. */
3104         flow->rule = flow_rule_alloc(1);
3105         if (!flow->rule) {
3106                 kfree(flow);
3107                 return ERR_PTR(-ENOMEM);
3108         }
3109
3110         match = (struct ethtool_rx_flow_match *)flow->priv;
3111         flow->rule->match.dissector     = &match->dissector;
3112         flow->rule->match.mask          = &match->mask;
3113         flow->rule->match.key           = &match->key;
3114
3115         match->mask.basic.n_proto = htons(0xffff);
3116
3117         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3118         case ETHER_FLOW: {
3119                 const struct ethhdr *ether_spec, *ether_m_spec;
3120
3121                 ether_spec = &fs->h_u.ether_spec;
3122                 ether_m_spec = &fs->m_u.ether_spec;
3123
3124                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3125                         ether_addr_copy(match->key.eth_addrs.src,
3126                                         ether_spec->h_source);
3127                         ether_addr_copy(match->mask.eth_addrs.src,
3128                                         ether_m_spec->h_source);
3129                 }
3130                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3131                         ether_addr_copy(match->key.eth_addrs.dst,
3132                                         ether_spec->h_dest);
3133                         ether_addr_copy(match->mask.eth_addrs.dst,
3134                                         ether_m_spec->h_dest);
3135                 }
3136                 if (ether_m_spec->h_proto) {
3137                         match->key.basic.n_proto = ether_spec->h_proto;
3138                         match->mask.basic.n_proto = ether_m_spec->h_proto;
3139                 }
3140                 }
3141                 break;
3142         case TCP_V4_FLOW:
3143         case UDP_V4_FLOW: {
3144                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3145
3146                 match->key.basic.n_proto = htons(ETH_P_IP);
3147
3148                 v4_spec = &fs->h_u.tcp_ip4_spec;
3149                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3150
3151                 if (v4_m_spec->ip4src) {
3152                         match->key.ipv4.src = v4_spec->ip4src;
3153                         match->mask.ipv4.src = v4_m_spec->ip4src;
3154                 }
3155                 if (v4_m_spec->ip4dst) {
3156                         match->key.ipv4.dst = v4_spec->ip4dst;
3157                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
3158                 }
3159                 if (v4_m_spec->ip4src ||
3160                     v4_m_spec->ip4dst) {
3161                         match->dissector.used_keys |=
3162                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3163                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3164                                 offsetof(struct ethtool_rx_flow_key, ipv4);
3165                 }
3166                 if (v4_m_spec->psrc) {
3167                         match->key.tp.src = v4_spec->psrc;
3168                         match->mask.tp.src = v4_m_spec->psrc;
3169                 }
3170                 if (v4_m_spec->pdst) {
3171                         match->key.tp.dst = v4_spec->pdst;
3172                         match->mask.tp.dst = v4_m_spec->pdst;
3173                 }
3174                 if (v4_m_spec->psrc ||
3175                     v4_m_spec->pdst) {
3176                         match->dissector.used_keys |=
3177                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
3178                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3179                                 offsetof(struct ethtool_rx_flow_key, tp);
3180                 }
3181                 if (v4_m_spec->tos) {
3182                         match->key.ip.tos = v4_spec->tos;
3183                         match->mask.ip.tos = v4_m_spec->tos;
3184                         match->dissector.used_keys |=
3185                                 BIT(FLOW_DISSECTOR_KEY_IP);
3186                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3187                                 offsetof(struct ethtool_rx_flow_key, ip);
3188                 }
3189                 }
3190                 break;
3191         case TCP_V6_FLOW:
3192         case UDP_V6_FLOW: {
3193                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3194
3195                 match->key.basic.n_proto = htons(ETH_P_IPV6);
3196
3197                 v6_spec = &fs->h_u.tcp_ip6_spec;
3198                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3199                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
3200                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3201                                sizeof(match->key.ipv6.src));
3202                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3203                                sizeof(match->mask.ipv6.src));
3204                 }
3205                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3206                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3207                                sizeof(match->key.ipv6.dst));
3208                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3209                                sizeof(match->mask.ipv6.dst));
3210                 }
3211                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
3212                     memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3213                         match->dissector.used_keys |=
3214                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3215                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3216                                 offsetof(struct ethtool_rx_flow_key, ipv6);
3217                 }
3218                 if (v6_m_spec->psrc) {
3219                         match->key.tp.src = v6_spec->psrc;
3220                         match->mask.tp.src = v6_m_spec->psrc;
3221                 }
3222                 if (v6_m_spec->pdst) {
3223                         match->key.tp.dst = v6_spec->pdst;
3224                         match->mask.tp.dst = v6_m_spec->pdst;
3225                 }
3226                 if (v6_m_spec->psrc ||
3227                     v6_m_spec->pdst) {
3228                         match->dissector.used_keys |=
3229                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
3230                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3231                                 offsetof(struct ethtool_rx_flow_key, tp);
3232                 }
3233                 if (v6_m_spec->tclass) {
3234                         match->key.ip.tos = v6_spec->tclass;
3235                         match->mask.ip.tos = v6_m_spec->tclass;
3236                         match->dissector.used_keys |=
3237                                 BIT(FLOW_DISSECTOR_KEY_IP);
3238                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3239                                 offsetof(struct ethtool_rx_flow_key, ip);
3240                 }
3241                 }
3242                 break;
3243         default:
3244                 ethtool_rx_flow_rule_destroy(flow);
3245                 return ERR_PTR(-EINVAL);
3246         }
3247
3248         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3249         case TCP_V4_FLOW:
3250         case TCP_V6_FLOW:
3251                 match->key.basic.ip_proto = IPPROTO_TCP;
3252                 match->mask.basic.ip_proto = 0xff;
3253                 break;
3254         case UDP_V4_FLOW:
3255         case UDP_V6_FLOW:
3256                 match->key.basic.ip_proto = IPPROTO_UDP;
3257                 match->mask.basic.ip_proto = 0xff;
3258                 break;
3259         }
3260
3261         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3262         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3263                 offsetof(struct ethtool_rx_flow_key, basic);
3264
3265         if (fs->flow_type & FLOW_EXT) {
3266                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3267                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3268
3269                 if (ext_m_spec->vlan_etype) {
3270                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3271                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3272                 }
3273
3274                 if (ext_m_spec->vlan_tci) {
3275                         match->key.vlan.vlan_id =
3276                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3277                         match->mask.vlan.vlan_id =
3278                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3279
3280                         match->key.vlan.vlan_dei =
3281                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3282                         match->mask.vlan.vlan_dei =
3283                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3284
3285                         match->key.vlan.vlan_priority =
3286                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3287                         match->mask.vlan.vlan_priority =
3288                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3289                 }
3290
3291                 if (ext_m_spec->vlan_etype ||
3292                     ext_m_spec->vlan_tci) {
3293                         match->dissector.used_keys |=
3294                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
3295                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3296                                 offsetof(struct ethtool_rx_flow_key, vlan);
3297                 }
3298         }
3299         if (fs->flow_type & FLOW_MAC_EXT) {
3300                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3301                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3302
3303                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3304                        ETH_ALEN);
3305                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3306                        ETH_ALEN);
3307
3308                 match->dissector.used_keys |=
3309                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3310                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3311                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3312         }
3313
3314         act = &flow->rule->action.entries[0];
3315         switch (fs->ring_cookie) {
3316         case RX_CLS_FLOW_DISC:
3317                 act->id = FLOW_ACTION_DROP;
3318                 break;
3319         case RX_CLS_FLOW_WAKE:
3320                 act->id = FLOW_ACTION_WAKE;
3321                 break;
3322         default:
3323                 act->id = FLOW_ACTION_QUEUE;
3324                 if (fs->flow_type & FLOW_RSS)
3325                         act->queue.ctx = input->rss_ctx;
3326
3327                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3328                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3329                 break;
3330         }
3331
3332         return flow;
3333 }
3334 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3335
3336 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3337 {
3338         kfree(flow->rule);
3339         kfree(flow);
3340 }
3341 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);