net/ethtool/ioctl.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/ethtool.c - Ethtool ioctl handler
   4  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   5  *
   6  * This file is where we call all the ethtool_ops commands to get
   7  * the information ethtool needs.
   8  */
   9
  10 #include <linux/compat.h>
  11 #include <linux/etherdevice.h>
  12 #include <linux/module.h>
  13 #include <linux/types.h>
  14 #include <linux/capability.h>
  15 #include <linux/errno.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/net_tstamp.h>
  19 #include <linux/phy.h>
  20 #include <linux/bitops.h>
  21 #include <linux/uaccess.h>
  22 #include <linux/vmalloc.h>
  23 #include <linux/sfp.h>
  24 #include <linux/slab.h>
  25 #include <linux/rtnetlink.h>
  26 #include <linux/sched/signal.h>
  27 #include <linux/net.h>
  28 #include <linux/pm_runtime.h>
  29 #include <net/devlink.h>
  30 #include <net/ipv6.h>
  31 #include <net/xdp_sock_drv.h>
  32 #include <net/flow_offload.h>
  33 #include <linux/ethtool_netlink.h>
  34 #include <generated/utsrelease.h>
  35 #include "common.h"
  36
  37 /* State held across locks and calls for commands which have devlink fallback */
  38 struct ethtool_devlink_compat {
  39         struct devlink *devlink;
  40         union {
  41                 struct ethtool_flash efl;
  42                 struct ethtool_drvinfo info;
  43         };
  44 };
  45
  46 static struct devlink *netdev_to_devlink_get(struct net_device *dev)
  47 {
  48         if (!dev->devlink_port)
  49                 return NULL;
  50         return devlink_try_get(dev->devlink_port->devlink);
  51 }
  52
  53 /*
  54  * Some useful ethtool_ops methods that're device independent.
  55  * If we find that all drivers want to do the same thing here,
  56  * we can turn these into dev_() function calls.
  57  */
  58
  59 u32 ethtool_op_get_link(struct net_device *dev)
  60 {
  61         return netif_carrier_ok(dev) ? 1 : 0;
  62 }
  63 EXPORT_SYMBOL(ethtool_op_get_link);
  64
  65 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  66 {
  67         info->so_timestamping =
  68                 SOF_TIMESTAMPING_TX_SOFTWARE |
  69                 SOF_TIMESTAMPING_RX_SOFTWARE |
  70                 SOF_TIMESTAMPING_SOFTWARE;
  71         info->phc_index = -1;
  72         return 0;
  73 }
  74 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  75
  76 /* Handlers for each ethtool command */
  77
  78 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  79 {
  80         struct ethtool_gfeatures cmd = {
  81                 .cmd = ETHTOOL_GFEATURES,
  82                 .size = ETHTOOL_DEV_FEATURE_WORDS,
  83         };
  84         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  85         u32 __user *sizeaddr;
  86         u32 copy_size;
  87         int i;
  88
  89         /* in case feature bits run out again */
  90         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  91
  92         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  93                 features[i].available = (u32)(dev->hw_features >> (32 * i));
  94                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
  95                 features[i].active = (u32)(dev->features >> (32 * i));
  96                 features[i].never_changed =
  97                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
  98         }
  99
 100         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 101         if (get_user(copy_size, sizeaddr))
 102                 return -EFAULT;
 103
 104         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 105                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 106
 107         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 108                 return -EFAULT;
 109         useraddr += sizeof(cmd);
 110         if (copy_to_user(useraddr, features,
 111                          array_size(copy_size, sizeof(*features))))
 112                 return -EFAULT;
 113
 114         return 0;
 115 }
 116
 117 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 118 {
 119         struct ethtool_sfeatures cmd;
 120         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 121         netdev_features_t wanted = 0, valid = 0;
 122         int i, ret = 0;
 123
 124         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 125                 return -EFAULT;
 126         useraddr += sizeof(cmd);
 127
 128         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 129                 return -EINVAL;
 130
 131         if (copy_from_user(features, useraddr, sizeof(features)))
 132                 return -EFAULT;
 133
 134         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 135                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 136                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 137         }
 138
 139         if (valid & ~NETIF_F_ETHTOOL_BITS)
 140                 return -EINVAL;
 141
 142         if (valid & ~dev->hw_features) {
 143                 valid &= dev->hw_features;
 144                 ret |= ETHTOOL_F_UNSUPPORTED;
 145         }
 146
 147         dev->wanted_features &= ~valid;
 148         dev->wanted_features |= wanted & valid;
 149         __netdev_update_features(dev);
 150
 151         if ((dev->wanted_features ^ dev->features) & valid)
 152                 ret |= ETHTOOL_F_WISH;
 153
 154         return ret;
 155 }
 156
 157 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 158 {
 159         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 160         const struct ethtool_ops *ops = dev->ethtool_ops;
 161
 162         if (sset == ETH_SS_FEATURES)
 163                 return ARRAY_SIZE(netdev_features_strings);
 164
 165         if (sset == ETH_SS_RSS_HASH_FUNCS)
 166                 return ARRAY_SIZE(rss_hash_func_strings);
 167
 168         if (sset == ETH_SS_TUNABLES)
 169                 return ARRAY_SIZE(tunable_strings);
 170
 171         if (sset == ETH_SS_PHY_TUNABLES)
 172                 return ARRAY_SIZE(phy_tunable_strings);
 173
 174         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 175             !ops->get_ethtool_phy_stats &&
 176             phy_ops && phy_ops->get_sset_count)
 177                 return phy_ops->get_sset_count(dev->phydev);
 178
 179         if (sset == ETH_SS_LINK_MODES)
 180                 return __ETHTOOL_LINK_MODE_MASK_NBITS;
 181
 182         if (ops->get_sset_count && ops->get_strings)
 183                 return ops->get_sset_count(dev, sset);
 184         else
 185                 return -EOPNOTSUPP;
 186 }
 187
 188 static void __ethtool_get_strings(struct net_device *dev,
 189         u32 stringset, u8 *data)
 190 {
 191         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 192         const struct ethtool_ops *ops = dev->ethtool_ops;
 193
 194         if (stringset == ETH_SS_FEATURES)
 195                 memcpy(data, netdev_features_strings,
 196                         sizeof(netdev_features_strings));
 197         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 198                 memcpy(data, rss_hash_func_strings,
 199                        sizeof(rss_hash_func_strings));
 200         else if (stringset == ETH_SS_TUNABLES)
 201                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 202         else if (stringset == ETH_SS_PHY_TUNABLES)
 203                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 204         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 205                  !ops->get_ethtool_phy_stats && phy_ops &&
 206                  phy_ops->get_strings)
 207                 phy_ops->get_strings(dev->phydev, data);
 208         else if (stringset == ETH_SS_LINK_MODES)
 209                 memcpy(data, link_mode_names,
 210                        __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 211         else
 212                 /* ops->get_strings is valid because checked earlier */
 213                 ops->get_strings(dev, stringset, data);
 214 }
 215
 216 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 217 {
 218         /* feature masks of legacy discrete ethtool ops */
 219
 220         switch (eth_cmd) {
 221         case ETHTOOL_GTXCSUM:
 222         case ETHTOOL_STXCSUM:
 223                 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
 224                        NETIF_F_SCTP_CRC;
 225         case ETHTOOL_GRXCSUM:
 226         case ETHTOOL_SRXCSUM:
 227                 return NETIF_F_RXCSUM;
 228         case ETHTOOL_GSG:
 229         case ETHTOOL_SSG:
 230                 return NETIF_F_SG | NETIF_F_FRAGLIST;
 231         case ETHTOOL_GTSO:
 232         case ETHTOOL_STSO:
 233                 return NETIF_F_ALL_TSO;
 234         case ETHTOOL_GGSO:
 235         case ETHTOOL_SGSO:
 236                 return NETIF_F_GSO;
 237         case ETHTOOL_GGRO:
 238         case ETHTOOL_SGRO:
 239                 return NETIF_F_GRO;
 240         default:
 241                 BUG();
 242         }
 243 }
 244
 245 static int ethtool_get_one_feature(struct net_device *dev,
 246         char __user *useraddr, u32 ethcmd)
 247 {
 248         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 249         struct ethtool_value edata = {
 250                 .cmd = ethcmd,
 251                 .data = !!(dev->features & mask),
 252         };
 253
 254         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 255                 return -EFAULT;
 256         return 0;
 257 }
 258
 259 static int ethtool_set_one_feature(struct net_device *dev,
 260         void __user *useraddr, u32 ethcmd)
 261 {
 262         struct ethtool_value edata;
 263         netdev_features_t mask;
 264
 265         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 266                 return -EFAULT;
 267
 268         mask = ethtool_get_feature_mask(ethcmd);
 269         mask &= dev->hw_features;
 270         if (!mask)
 271                 return -EOPNOTSUPP;
 272
 273         if (edata.data)
 274                 dev->wanted_features |= mask;
 275         else
 276                 dev->wanted_features &= ~mask;
 277
 278         __netdev_update_features(dev);
 279
 280         return 0;
 281 }
 282
 283 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 284                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 285 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 286                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 287                           NETIF_F_RXHASH)
 288
 289 static u32 __ethtool_get_flags(struct net_device *dev)
 290 {
 291         u32 flags = 0;
 292
 293         if (dev->features & NETIF_F_LRO)
 294                 flags |= ETH_FLAG_LRO;
 295         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 296                 flags |= ETH_FLAG_RXVLAN;
 297         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 298                 flags |= ETH_FLAG_TXVLAN;
 299         if (dev->features & NETIF_F_NTUPLE)
 300                 flags |= ETH_FLAG_NTUPLE;
 301         if (dev->features & NETIF_F_RXHASH)
 302                 flags |= ETH_FLAG_RXHASH;
 303
 304         return flags;
 305 }
 306
 307 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 308 {
 309         netdev_features_t features = 0, changed;
 310
 311         if (data & ~ETH_ALL_FLAGS)
 312                 return -EINVAL;
 313
 314         if (data & ETH_FLAG_LRO)
 315                 features |= NETIF_F_LRO;
 316         if (data & ETH_FLAG_RXVLAN)
 317                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 318         if (data & ETH_FLAG_TXVLAN)
 319                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 320         if (data & ETH_FLAG_NTUPLE)
 321                 features |= NETIF_F_NTUPLE;
 322         if (data & ETH_FLAG_RXHASH)
 323                 features |= NETIF_F_RXHASH;
 324
 325         /* allow changing only bits set in hw_features */
 326         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 327         if (changed & ~dev->hw_features)
 328                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 329
 330         dev->wanted_features =
 331                 (dev->wanted_features & ~changed) | (features & changed);
 332
 333         __netdev_update_features(dev);
 334
 335         return 0;
 336 }
 337
 338 /* Given two link masks, AND them together and save the result in dst. */
 339 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 340                                   struct ethtool_link_ksettings *src)
 341 {
 342         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 343         unsigned int idx = 0;
 344
 345         for (; idx < size; idx++) {
 346                 dst->link_modes.supported[idx] &=
 347                         src->link_modes.supported[idx];
 348                 dst->link_modes.advertising[idx] &=
 349                         src->link_modes.advertising[idx];
 350         }
 351 }
 352 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 353
 354 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 355                                              u32 legacy_u32)
 356 {
 357         linkmode_zero(dst);
 358         dst[0] = legacy_u32;
 359 }
 360 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 361
 362 /* return false if src had higher bits set. lower bits always updated. */
 363 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 364                                              const unsigned long *src)
 365 {
 366         *legacy_u32 = src[0];
 367         return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
 368                 __ETHTOOL_LINK_MODE_MASK_NBITS;
 369 }
 370 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 371
 372 /* return false if ksettings link modes had higher bits
 373  * set. legacy_settings always updated (best effort)
 374  */
 375 static bool
 376 convert_link_ksettings_to_legacy_settings(
 377         struct ethtool_cmd *legacy_settings,
 378         const struct ethtool_link_ksettings *link_ksettings)
 379 {
 380         bool retval = true;
 381
 382         memset(legacy_settings, 0, sizeof(*legacy_settings));
 383         /* this also clears the deprecated fields in legacy structure:
 384          * __u8         transceiver;
 385          * __u32        maxtxpkt;
 386          * __u32        maxrxpkt;
 387          */
 388
 389         retval &= ethtool_convert_link_mode_to_legacy_u32(
 390                 &legacy_settings->supported,
 391                 link_ksettings->link_modes.supported);
 392         retval &= ethtool_convert_link_mode_to_legacy_u32(
 393                 &legacy_settings->advertising,
 394                 link_ksettings->link_modes.advertising);
 395         retval &= ethtool_convert_link_mode_to_legacy_u32(
 396                 &legacy_settings->lp_advertising,
 397                 link_ksettings->link_modes.lp_advertising);
 398         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 399         legacy_settings->duplex
 400                 = link_ksettings->base.duplex;
 401         legacy_settings->port
 402                 = link_ksettings->base.port;
 403         legacy_settings->phy_address
 404                 = link_ksettings->base.phy_address;
 405         legacy_settings->autoneg
 406                 = link_ksettings->base.autoneg;
 407         legacy_settings->mdio_support
 408                 = link_ksettings->base.mdio_support;
 409         legacy_settings->eth_tp_mdix
 410                 = link_ksettings->base.eth_tp_mdix;
 411         legacy_settings->eth_tp_mdix_ctrl
 412                 = link_ksettings->base.eth_tp_mdix_ctrl;
 413         legacy_settings->transceiver
 414                 = link_ksettings->base.transceiver;
 415         return retval;
 416 }
 417
 418 /* number of 32-bit words to store the user's link mode bitmaps */
 419 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 420         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 421
 422 /* layout of the struct passed from/to userland */
 423 struct ethtool_link_usettings {
 424         struct ethtool_link_settings base;
 425         struct {
 426                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 427                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 428                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 429         } link_modes;
 430 };
 431
 432 /* Internal kernel helper to query a device ethtool_link_settings. */
 433 int __ethtool_get_link_ksettings(struct net_device *dev,
 434                                  struct ethtool_link_ksettings *link_ksettings)
 435 {
 436         ASSERT_RTNL();
 437
 438         if (!dev->ethtool_ops->get_link_ksettings)
 439                 return -EOPNOTSUPP;
 440
 441         memset(link_ksettings, 0, sizeof(*link_ksettings));
 442         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 443 }
 444 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 445
 446 /* convert ethtool_link_usettings in user space to a kernel internal
 447  * ethtool_link_ksettings. return 0 on success, errno on error.
 448  */
 449 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 450                                          const void __user *from)
 451 {
 452         struct ethtool_link_usettings link_usettings;
 453
 454         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 455                 return -EFAULT;
 456
 457         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 458         bitmap_from_arr32(to->link_modes.supported,
 459                           link_usettings.link_modes.supported,
 460                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 461         bitmap_from_arr32(to->link_modes.advertising,
 462                           link_usettings.link_modes.advertising,
 463                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 464         bitmap_from_arr32(to->link_modes.lp_advertising,
 465                           link_usettings.link_modes.lp_advertising,
 466                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 467
 468         return 0;
 469 }
 470
 471 /* Check if the user is trying to change anything besides speed/duplex */
 472 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
 473 {
 474         struct ethtool_link_settings base2 = {};
 475
 476         base2.speed = cmd->base.speed;
 477         base2.port = PORT_OTHER;
 478         base2.duplex = cmd->base.duplex;
 479         base2.cmd = cmd->base.cmd;
 480         base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
 481
 482         return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
 483                 bitmap_empty(cmd->link_modes.supported,
 484                              __ETHTOOL_LINK_MODE_MASK_NBITS) &&
 485                 bitmap_empty(cmd->link_modes.lp_advertising,
 486                              __ETHTOOL_LINK_MODE_MASK_NBITS);
 487 }
 488
 489 /* convert a kernel internal ethtool_link_ksettings to
 490  * ethtool_link_usettings in user space. return 0 on success, errno on
 491  * error.
 492  */
 493 static int
 494 store_link_ksettings_for_user(void __user *to,
 495                               const struct ethtool_link_ksettings *from)
 496 {
 497         struct ethtool_link_usettings link_usettings;
 498
 499         memcpy(&link_usettings, from, sizeof(link_usettings));
 500         bitmap_to_arr32(link_usettings.link_modes.supported,
 501                         from->link_modes.supported,
 502                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 503         bitmap_to_arr32(link_usettings.link_modes.advertising,
 504                         from->link_modes.advertising,
 505                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 506         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 507                         from->link_modes.lp_advertising,
 508                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 509
 510         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 511                 return -EFAULT;
 512
 513         return 0;
 514 }
 515
 516 /* Query device for its ethtool_link_settings. */
 517 static int ethtool_get_link_ksettings(struct net_device *dev,
 518                                       void __user *useraddr)
 519 {
 520         int err = 0;
 521         struct ethtool_link_ksettings link_ksettings;
 522
 523         ASSERT_RTNL();
 524         if (!dev->ethtool_ops->get_link_ksettings)
 525                 return -EOPNOTSUPP;
 526
 527         /* handle bitmap nbits handshake */
 528         if (copy_from_user(&link_ksettings.base, useraddr,
 529                            sizeof(link_ksettings.base)))
 530                 return -EFAULT;
 531
 532         if (__ETHTOOL_LINK_MODE_MASK_NU32
 533             != link_ksettings.base.link_mode_masks_nwords) {
 534                 /* wrong link mode nbits requested */
 535                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 536                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 537                 /* send back number of words required as negative val */
 538                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 539                                    "need too many bits for link modes!");
 540                 link_ksettings.base.link_mode_masks_nwords
 541                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 542
 543                 /* copy the base fields back to user, not the link
 544                  * mode bitmaps
 545                  */
 546                 if (copy_to_user(useraddr, &link_ksettings.base,
 547                                  sizeof(link_ksettings.base)))
 548                         return -EFAULT;
 549
 550                 return 0;
 551         }
 552
 553         /* handshake successful: user/kernel agree on
 554          * link_mode_masks_nwords
 555          */
 556
 557         memset(&link_ksettings, 0, sizeof(link_ksettings));
 558         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 559         if (err < 0)
 560                 return err;
 561
 562         /* make sure we tell the right values to user */
 563         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 564         link_ksettings.base.link_mode_masks_nwords
 565                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 566         link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
 567         link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 568         link_ksettings.base.rate_matching = RATE_MATCH_NONE;
 569
 570         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 571 }
 572
 573 /* Update device ethtool_link_settings. */
 574 static int ethtool_set_link_ksettings(struct net_device *dev,
 575                                       void __user *useraddr)
 576 {
 577         struct ethtool_link_ksettings link_ksettings = {};
 578         int err;
 579
 580         ASSERT_RTNL();
 581
 582         if (!dev->ethtool_ops->set_link_ksettings)
 583                 return -EOPNOTSUPP;
 584
 585         /* make sure nbits field has expected value */
 586         if (copy_from_user(&link_ksettings.base, useraddr,
 587                            sizeof(link_ksettings.base)))
 588                 return -EFAULT;
 589
 590         if (__ETHTOOL_LINK_MODE_MASK_NU32
 591             != link_ksettings.base.link_mode_masks_nwords)
 592                 return -EINVAL;
 593
 594         /* copy the whole structure, now that we know it has expected
 595          * format
 596          */
 597         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 598         if (err)
 599                 return err;
 600
 601         /* re-check nwords field, just in case */
 602         if (__ETHTOOL_LINK_MODE_MASK_NU32
 603             != link_ksettings.base.link_mode_masks_nwords)
 604                 return -EINVAL;
 605
 606         if (link_ksettings.base.master_slave_cfg ||
 607             link_ksettings.base.master_slave_state)
 608                 return -EINVAL;
 609
 610         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 611         if (err >= 0) {
 612                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 613                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 614         }
 615         return err;
 616 }
 617
 618 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 619                                        const struct ethtool_link_ksettings *cmd,
 620                                        u32 *dev_speed, u8 *dev_duplex)
 621 {
 622         u32 speed;
 623         u8 duplex;
 624
 625         speed = cmd->base.speed;
 626         duplex = cmd->base.duplex;
 627         /* don't allow custom speed and duplex */
 628         if (!ethtool_validate_speed(speed) ||
 629             !ethtool_validate_duplex(duplex) ||
 630             !ethtool_virtdev_validate_cmd(cmd))
 631                 return -EINVAL;
 632         *dev_speed = speed;
 633         *dev_duplex = duplex;
 634
 635         return 0;
 636 }
 637 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 638
 639 /* Query device for its ethtool_cmd settings.
 640  *
 641  * Backward compatibility note: for compatibility with legacy ethtool, this is
 642  * now implemented via get_link_ksettings. When driver reports higher link mode
 643  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 644  * recommend user to upgrade ethtool, but the command is successful (only the
 645  * lower link mode bits reported back to user). Deprecated fields from
 646  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 647  */
 648 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 649 {
 650         struct ethtool_link_ksettings link_ksettings;
 651         struct ethtool_cmd cmd;
 652         int err;
 653
 654         ASSERT_RTNL();
 655         if (!dev->ethtool_ops->get_link_ksettings)
 656                 return -EOPNOTSUPP;
 657
 658         memset(&link_ksettings, 0, sizeof(link_ksettings));
 659         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 660         if (err < 0)
 661                 return err;
 662         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 663
 664         /* send a sensible cmd tag back to user */
 665         cmd.cmd = ETHTOOL_GSET;
 666
 667         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 668                 return -EFAULT;
 669
 670         return 0;
 671 }
 672
 673 /* Update device link settings with given ethtool_cmd.
 674  *
 675  * Backward compatibility note: for compatibility with legacy ethtool, this is
 676  * now always implemented via set_link_settings. When user's request updates
 677  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 678  * warning is logged once (with name of 1st driver/device) to recommend user to
 679  * upgrade ethtool, and the request is rejected.
 680  */
 681 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 682 {
 683         struct ethtool_link_ksettings link_ksettings;
 684         struct ethtool_cmd cmd;
 685         int ret;
 686
 687         ASSERT_RTNL();
 688
 689         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 690                 return -EFAULT;
 691         if (!dev->ethtool_ops->set_link_ksettings)
 692                 return -EOPNOTSUPP;
 693
 694         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 695                 return -EINVAL;
 696         link_ksettings.base.link_mode_masks_nwords =
 697                 __ETHTOOL_LINK_MODE_MASK_NU32;
 698         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 699         if (ret >= 0) {
 700                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 701                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 702         }
 703         return ret;
 704 }
 705
 706 static int
 707 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
 708 {
 709         const struct ethtool_ops *ops = dev->ethtool_ops;
 710         struct device *parent = dev->dev.parent;
 711
 712         rsp->info.cmd = ETHTOOL_GDRVINFO;
 713         strscpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version));
 714         if (ops->get_drvinfo) {
 715                 ops->get_drvinfo(dev, &rsp->info);
 716                 if (!rsp->info.bus_info[0] && parent)
 717                         strscpy(rsp->info.bus_info, dev_name(parent),
 718                                 sizeof(rsp->info.bus_info));
 719                 if (!rsp->info.driver[0] && parent && parent->driver)
 720                         strscpy(rsp->info.driver, parent->driver->name,
 721                                 sizeof(rsp->info.driver));
 722         } else if (parent && parent->driver) {
 723                 strscpy(rsp->info.bus_info, dev_name(parent),
 724                         sizeof(rsp->info.bus_info));
 725                 strscpy(rsp->info.driver, parent->driver->name,
 726                         sizeof(rsp->info.driver));
 727         } else if (dev->rtnl_link_ops) {
 728                 strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
 729                         sizeof(rsp->info.driver));
 730         } else {
 731                 return -EOPNOTSUPP;
 732         }
 733
 734         /*
 735          * this method of obtaining string set info is deprecated;
 736          * Use ETHTOOL_GSSET_INFO instead.
 737          */
 738         if (ops->get_sset_count) {
 739                 int rc;
 740
 741                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 742                 if (rc >= 0)
 743                         rsp->info.testinfo_len = rc;
 744                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 745                 if (rc >= 0)
 746                         rsp->info.n_stats = rc;
 747                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 748                 if (rc >= 0)
 749                         rsp->info.n_priv_flags = rc;
 750         }
 751         if (ops->get_regs_len) {
 752                 int ret = ops->get_regs_len(dev);
 753
 754                 if (ret > 0)
 755                         rsp->info.regdump_len = ret;
 756         }
 757
 758         if (ops->get_eeprom_len)
 759                 rsp->info.eedump_len = ops->get_eeprom_len(dev);
 760
 761         if (!rsp->info.fw_version[0])
 762                 rsp->devlink = netdev_to_devlink_get(dev);
 763
 764         return 0;
 765 }
 766
 767 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 768                                                     void __user *useraddr)
 769 {
 770         struct ethtool_sset_info info;
 771         u64 sset_mask;
 772         int i, idx = 0, n_bits = 0, ret, rc;
 773         u32 *info_buf = NULL;
 774
 775         if (copy_from_user(&info, useraddr, sizeof(info)))
 776                 return -EFAULT;
 777
 778         /* store copy of mask, because we zero struct later on */
 779         sset_mask = info.sset_mask;
 780         if (!sset_mask)
 781                 return 0;
 782
 783         /* calculate size of return buffer */
 784         n_bits = hweight64(sset_mask);
 785
 786         memset(&info, 0, sizeof(info));
 787         info.cmd = ETHTOOL_GSSET_INFO;
 788
 789         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 790         if (!info_buf)
 791                 return -ENOMEM;
 792
 793         /*
 794          * fill return buffer based on input bitmask and successful
 795          * get_sset_count return
 796          */
 797         for (i = 0; i < 64; i++) {
 798                 if (!(sset_mask & (1ULL << i)))
 799                         continue;
 800
 801                 rc = __ethtool_get_sset_count(dev, i);
 802                 if (rc >= 0) {
 803                         info.sset_mask |= (1ULL << i);
 804                         info_buf[idx++] = rc;
 805                 }
 806         }
 807
 808         ret = -EFAULT;
 809         if (copy_to_user(useraddr, &info, sizeof(info)))
 810                 goto out;
 811
 812         useraddr += offsetof(struct ethtool_sset_info, data);
 813         if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
 814                 goto out;
 815
 816         ret = 0;
 817
 818 out:
 819         kfree(info_buf);
 820         return ret;
 821 }
 822
 823 static noinline_for_stack int
 824 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
 825                                const struct compat_ethtool_rxnfc __user *useraddr,
 826                                size_t size)
 827 {
 828         struct compat_ethtool_rxnfc crxnfc = {};
 829
 830         /* We expect there to be holes between fs.m_ext and
 831          * fs.ring_cookie and at the end of fs, but nowhere else.
 832          * On non-x86, no conversion should be needed.
 833          */
 834         BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
 835                      sizeof(struct compat_ethtool_rxnfc) !=
 836                      sizeof(struct ethtool_rxnfc));
 837         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
 838                      sizeof(useraddr->fs.m_ext) !=
 839                      offsetof(struct ethtool_rxnfc, fs.m_ext) +
 840                      sizeof(rxnfc->fs.m_ext));
 841         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
 842                      offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
 843                      offsetof(struct ethtool_rxnfc, fs.location) -
 844                      offsetof(struct ethtool_rxnfc, fs.ring_cookie));
 845
 846         if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
 847                 return -EFAULT;
 848
 849         *rxnfc = (struct ethtool_rxnfc) {
 850                 .cmd            = crxnfc.cmd,
 851                 .flow_type      = crxnfc.flow_type,
 852                 .data           = crxnfc.data,
 853                 .fs             = {
 854                         .flow_type      = crxnfc.fs.flow_type,
 855                         .h_u            = crxnfc.fs.h_u,
 856                         .h_ext          = crxnfc.fs.h_ext,
 857                         .m_u            = crxnfc.fs.m_u,
 858                         .m_ext          = crxnfc.fs.m_ext,
 859                         .ring_cookie    = crxnfc.fs.ring_cookie,
 860                         .location       = crxnfc.fs.location,
 861                 },
 862                 .rule_cnt       = crxnfc.rule_cnt,
 863         };
 864
 865         return 0;
 866 }
 867
 868 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
 869                                         const void __user *useraddr,
 870                                         size_t size)
 871 {
 872         if (compat_need_64bit_alignment_fixup())
 873                 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
 874
 875         if (copy_from_user(rxnfc, useraddr, size))
 876                 return -EFAULT;
 877
 878         return 0;
 879 }
 880
 881 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
 882                                         const struct ethtool_rxnfc *rxnfc,
 883                                         size_t size, const u32 *rule_buf)
 884 {
 885         struct compat_ethtool_rxnfc crxnfc;
 886
 887         memset(&crxnfc, 0, sizeof(crxnfc));
 888         crxnfc = (struct compat_ethtool_rxnfc) {
 889                 .cmd            = rxnfc->cmd,
 890                 .flow_type      = rxnfc->flow_type,
 891                 .data           = rxnfc->data,
 892                 .fs             = {
 893                         .flow_type      = rxnfc->fs.flow_type,
 894                         .h_u            = rxnfc->fs.h_u,
 895                         .h_ext          = rxnfc->fs.h_ext,
 896                         .m_u            = rxnfc->fs.m_u,
 897                         .m_ext          = rxnfc->fs.m_ext,
 898                         .ring_cookie    = rxnfc->fs.ring_cookie,
 899                         .location       = rxnfc->fs.location,
 900                 },
 901                 .rule_cnt       = rxnfc->rule_cnt,
 902         };
 903
 904         if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
 905                 return -EFAULT;
 906
 907         return 0;
 908 }
 909
 910 static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
 911                                      size_t *info_size, void __user *useraddr)
 912 {
 913         /* struct ethtool_rxnfc was originally defined for
 914          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 915          * members.  User-space might still be using that
 916          * definition.
 917          */
 918         if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
 919                 *info_size = (offsetof(struct ethtool_rxnfc, data) +
 920                               sizeof(info->data));
 921
 922         if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 923                 return -EFAULT;
 924
 925         if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
 926                 *info_size = sizeof(*info);
 927                 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 928                         return -EFAULT;
 929                 /* Since malicious users may modify the original data,
 930                  * we need to check whether FLOW_RSS is still requested.
 931                  */
 932                 if (!(info->flow_type & FLOW_RSS))
 933                         return -EINVAL;
 934         }
 935
 936         if (info->cmd != cmd)
 937                 return -EINVAL;
 938
 939         return 0;
 940 }
 941
 942 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
 943                                       const struct ethtool_rxnfc *rxnfc,
 944                                       size_t size, const u32 *rule_buf)
 945 {
 946         int ret;
 947
 948         if (compat_need_64bit_alignment_fixup()) {
 949                 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
 950                                                    rule_buf);
 951                 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
 952         } else {
 953                 ret = copy_to_user(useraddr, rxnfc, size);
 954                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 955         }
 956
 957         if (ret)
 958                 return -EFAULT;
 959
 960         if (rule_buf) {
 961                 if (copy_to_user(useraddr, rule_buf,
 962                                  rxnfc->rule_cnt * sizeof(u32)))
 963                         return -EFAULT;
 964         }
 965
 966         return 0;
 967 }
 968
 969 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 970                                                 u32 cmd, void __user *useraddr)
 971 {
 972         struct ethtool_rxnfc info;
 973         size_t info_size = sizeof(info);
 974         int rc;
 975
 976         if (!dev->ethtool_ops->set_rxnfc)
 977                 return -EOPNOTSUPP;
 978
 979         rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
 980         if (rc)
 981                 return rc;
 982
 983         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 984         if (rc)
 985                 return rc;
 986
 987         if (cmd == ETHTOOL_SRXCLSRLINS &&
 988             ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
 989                 return -EFAULT;
 990
 991         return 0;
 992 }
 993
 994 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 995                                                 u32 cmd, void __user *useraddr)
 996 {
 997         struct ethtool_rxnfc info;
 998         size_t info_size = sizeof(info);
 999         const struct ethtool_ops *ops = dev->ethtool_ops;
1000         int ret;
1001         void *rule_buf = NULL;
1002
1003         if (!ops->get_rxnfc)
1004                 return -EOPNOTSUPP;
1005
1006         ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1007         if (ret)
1008                 return ret;
1009
1010         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1011                 if (info.rule_cnt > 0) {
1012                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1013                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1014                                                    GFP_USER);
1015                         if (!rule_buf)
1016                                 return -ENOMEM;
1017                 }
1018         }
1019
1020         ret = ops->get_rxnfc(dev, &info, rule_buf);
1021         if (ret < 0)
1022                 goto err_out;
1023
1024         ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1025 err_out:
1026         kfree(rule_buf);
1027
1028         return ret;
1029 }
1030
1031 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1032                                         struct ethtool_rxnfc *rx_rings,
1033                                         u32 size)
1034 {
1035         int i;
1036
1037         if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1038                 return -EFAULT;
1039
1040         /* Validate ring indices */
1041         for (i = 0; i < size; i++)
1042                 if (indir[i] >= rx_rings->data)
1043                         return -EINVAL;
1044
1045         return 0;
1046 }
1047
1048 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1049
1050 void netdev_rss_key_fill(void *buffer, size_t len)
1051 {
1052         BUG_ON(len > sizeof(netdev_rss_key));
1053         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1054         memcpy(buffer, netdev_rss_key, len);
1055 }
1056 EXPORT_SYMBOL(netdev_rss_key_fill);
1057
1058 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1059                                                      void __user *useraddr)
1060 {
1061         u32 user_size, dev_size;
1062         u32 *indir;
1063         int ret;
1064
1065         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1066             !dev->ethtool_ops->get_rxfh)
1067                 return -EOPNOTSUPP;
1068         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1069         if (dev_size == 0)
1070                 return -EOPNOTSUPP;
1071
1072         if (copy_from_user(&user_size,
1073                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1074                            sizeof(user_size)))
1075                 return -EFAULT;
1076
1077         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1078                          &dev_size, sizeof(dev_size)))
1079                 return -EFAULT;
1080
1081         /* If the user buffer size is 0, this is just a query for the
1082          * device table size.  Otherwise, if it's smaller than the
1083          * device table size it's an error.
1084          */
1085         if (user_size < dev_size)
1086                 return user_size == 0 ? 0 : -EINVAL;
1087
1088         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1089         if (!indir)
1090                 return -ENOMEM;
1091
1092         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1093         if (ret)
1094                 goto out;
1095
1096         if (copy_to_user(useraddr +
1097                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1098                          indir, dev_size * sizeof(indir[0])))
1099                 ret = -EFAULT;
1100
1101 out:
1102         kfree(indir);
1103         return ret;
1104 }
1105
1106 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1107                                                      void __user *useraddr)
1108 {
1109         struct ethtool_rxnfc rx_rings;
1110         u32 user_size, dev_size, i;
1111         u32 *indir;
1112         const struct ethtool_ops *ops = dev->ethtool_ops;
1113         int ret;
1114         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1115
1116         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1117             !ops->get_rxnfc)
1118                 return -EOPNOTSUPP;
1119
1120         dev_size = ops->get_rxfh_indir_size(dev);
1121         if (dev_size == 0)
1122                 return -EOPNOTSUPP;
1123
1124         if (copy_from_user(&user_size,
1125                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1126                            sizeof(user_size)))
1127                 return -EFAULT;
1128
1129         if (user_size != 0 && user_size != dev_size)
1130                 return -EINVAL;
1131
1132         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1133         if (!indir)
1134                 return -ENOMEM;
1135
1136         rx_rings.cmd = ETHTOOL_GRXRINGS;
1137         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1138         if (ret)
1139                 goto out;
1140
1141         if (user_size == 0) {
1142                 for (i = 0; i < dev_size; i++)
1143                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1144         } else {
1145                 ret = ethtool_copy_validate_indir(indir,
1146                                                   useraddr + ringidx_offset,
1147                                                   &rx_rings,
1148                                                   dev_size);
1149                 if (ret)
1150                         goto out;
1151         }
1152
1153         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1154         if (ret)
1155                 goto out;
1156
1157         /* indicate whether rxfh was set to default */
1158         if (user_size == 0)
1159                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1160         else
1161                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1162
1163 out:
1164         kfree(indir);
1165         return ret;
1166 }
1167
1168 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1169                                                void __user *useraddr)
1170 {
1171         int ret;
1172         const struct ethtool_ops *ops = dev->ethtool_ops;
1173         u32 user_indir_size, user_key_size;
1174         u32 dev_indir_size = 0, dev_key_size = 0;
1175         struct ethtool_rxfh rxfh;
1176         u32 total_size;
1177         u32 indir_bytes;
1178         u32 *indir = NULL;
1179         u8 dev_hfunc = 0;
1180         u8 *hkey = NULL;
1181         u8 *rss_config;
1182
1183         if (!ops->get_rxfh)
1184                 return -EOPNOTSUPP;
1185
1186         if (ops->get_rxfh_indir_size)
1187                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1188         if (ops->get_rxfh_key_size)
1189                 dev_key_size = ops->get_rxfh_key_size(dev);
1190
1191         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1192                 return -EFAULT;
1193         user_indir_size = rxfh.indir_size;
1194         user_key_size = rxfh.key_size;
1195
1196         /* Check that reserved fields are 0 for now */
1197         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1198                 return -EINVAL;
1199         /* Most drivers don't handle rss_context, check it's 0 as well */
1200         if (rxfh.rss_context && !ops->get_rxfh_context)
1201                 return -EOPNOTSUPP;
1202
1203         rxfh.indir_size = dev_indir_size;
1204         rxfh.key_size = dev_key_size;
1205         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1206                 return -EFAULT;
1207
1208         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1209             (user_key_size && (user_key_size != dev_key_size)))
1210                 return -EINVAL;
1211
1212         indir_bytes = user_indir_size * sizeof(indir[0]);
1213         total_size = indir_bytes + user_key_size;
1214         rss_config = kzalloc(total_size, GFP_USER);
1215         if (!rss_config)
1216                 return -ENOMEM;
1217
1218         if (user_indir_size)
1219                 indir = (u32 *)rss_config;
1220
1221         if (user_key_size)
1222                 hkey = rss_config + indir_bytes;
1223
1224         if (rxfh.rss_context)
1225                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1226                                                          &dev_hfunc,
1227                                                          rxfh.rss_context);
1228         else
1229                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1230         if (ret)
1231                 goto out;
1232
1233         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1234                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1235                 ret = -EFAULT;
1236         } else if (copy_to_user(useraddr +
1237                               offsetof(struct ethtool_rxfh, rss_config[0]),
1238                               rss_config, total_size)) {
1239                 ret = -EFAULT;
1240         }
1241 out:
1242         kfree(rss_config);
1243
1244         return ret;
1245 }
1246
1247 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1248                                                void __user *useraddr)
1249 {
1250         int ret;
1251         const struct ethtool_ops *ops = dev->ethtool_ops;
1252         struct ethtool_rxnfc rx_rings;
1253         struct ethtool_rxfh rxfh;
1254         u32 dev_indir_size = 0, dev_key_size = 0, i;
1255         u32 *indir = NULL, indir_bytes = 0;
1256         u8 *hkey = NULL;
1257         u8 *rss_config;
1258         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1259         bool delete = false;
1260
1261         if (!ops->get_rxnfc || !ops->set_rxfh)
1262                 return -EOPNOTSUPP;
1263
1264         if (ops->get_rxfh_indir_size)
1265                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1266         if (ops->get_rxfh_key_size)
1267                 dev_key_size = ops->get_rxfh_key_size(dev);
1268
1269         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1270                 return -EFAULT;
1271
1272         /* Check that reserved fields are 0 for now */
1273         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1274                 return -EINVAL;
1275         /* Most drivers don't handle rss_context, check it's 0 as well */
1276         if (rxfh.rss_context && !ops->set_rxfh_context)
1277                 return -EOPNOTSUPP;
1278
1279         /* If either indir, hash key or function is valid, proceed further.
1280          * Must request at least one change: indir size, hash key or function.
1281          */
1282         if ((rxfh.indir_size &&
1283              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1284              rxfh.indir_size != dev_indir_size) ||
1285             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1286             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1287              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1288                 return -EINVAL;
1289
1290         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1291                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1292
1293         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1294         if (!rss_config)
1295                 return -ENOMEM;
1296
1297         rx_rings.cmd = ETHTOOL_GRXRINGS;
1298         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1299         if (ret)
1300                 goto out;
1301
1302         /* rxfh.indir_size == 0 means reset the indir table to default (master
1303          * context) or delete the context (other RSS contexts).
1304          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1305          */
1306         if (rxfh.indir_size &&
1307             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1308                 indir = (u32 *)rss_config;
1309                 ret = ethtool_copy_validate_indir(indir,
1310                                                   useraddr + rss_cfg_offset,
1311                                                   &rx_rings,
1312                                                   rxfh.indir_size);
1313                 if (ret)
1314                         goto out;
1315         } else if (rxfh.indir_size == 0) {
1316                 if (rxfh.rss_context == 0) {
1317                         indir = (u32 *)rss_config;
1318                         for (i = 0; i < dev_indir_size; i++)
1319                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1320                 } else {
1321                         delete = true;
1322                 }
1323         }
1324
1325         if (rxfh.key_size) {
1326                 hkey = rss_config + indir_bytes;
1327                 if (copy_from_user(hkey,
1328                                    useraddr + rss_cfg_offset + indir_bytes,
1329                                    rxfh.key_size)) {
1330                         ret = -EFAULT;
1331                         goto out;
1332                 }
1333         }
1334
1335         if (rxfh.rss_context)
1336                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1337                                             &rxfh.rss_context, delete);
1338         else
1339                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1340         if (ret)
1341                 goto out;
1342
1343         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1344                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1345                 ret = -EFAULT;
1346
1347         if (!rxfh.rss_context) {
1348                 /* indicate whether rxfh was set to default */
1349                 if (rxfh.indir_size == 0)
1350                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1351                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1352                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1353         }
1354
1355 out:
1356         kfree(rss_config);
1357         return ret;
1358 }
1359
1360 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1361 {
1362         struct ethtool_regs regs;
1363         const struct ethtool_ops *ops = dev->ethtool_ops;
1364         void *regbuf;
1365         int reglen, ret;
1366
1367         if (!ops->get_regs || !ops->get_regs_len)
1368                 return -EOPNOTSUPP;
1369
1370         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1371                 return -EFAULT;
1372
1373         reglen = ops->get_regs_len(dev);
1374         if (reglen <= 0)
1375                 return reglen;
1376
1377         if (regs.len > reglen)
1378                 regs.len = reglen;
1379
1380         regbuf = vzalloc(reglen);
1381         if (!regbuf)
1382                 return -ENOMEM;
1383
1384         if (regs.len < reglen)
1385                 reglen = regs.len;
1386
1387         ops->get_regs(dev, &regs, regbuf);
1388
1389         ret = -EFAULT;
1390         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1391                 goto out;
1392         useraddr += offsetof(struct ethtool_regs, data);
1393         if (copy_to_user(useraddr, regbuf, reglen))
1394                 goto out;
1395         ret = 0;
1396
1397  out:
1398         vfree(regbuf);
1399         return ret;
1400 }
1401
1402 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1403 {
1404         struct ethtool_value reset;
1405         int ret;
1406
1407         if (!dev->ethtool_ops->reset)
1408                 return -EOPNOTSUPP;
1409
1410         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1411                 return -EFAULT;
1412
1413         ret = dev->ethtool_ops->reset(dev, &reset.data);
1414         if (ret)
1415                 return ret;
1416
1417         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1418                 return -EFAULT;
1419         return 0;
1420 }
1421
1422 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1423 {
1424         struct ethtool_wolinfo wol;
1425
1426         if (!dev->ethtool_ops->get_wol)
1427                 return -EOPNOTSUPP;
1428
1429         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1430         wol.cmd = ETHTOOL_GWOL;
1431         dev->ethtool_ops->get_wol(dev, &wol);
1432
1433         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1434                 return -EFAULT;
1435         return 0;
1436 }
1437
1438 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1439 {
1440         struct ethtool_wolinfo wol, cur_wol;
1441         int ret;
1442
1443         if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1444                 return -EOPNOTSUPP;
1445
1446         memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1447         cur_wol.cmd = ETHTOOL_GWOL;
1448         dev->ethtool_ops->get_wol(dev, &cur_wol);
1449
1450         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1451                 return -EFAULT;
1452
1453         if (wol.wolopts & ~cur_wol.supported)
1454                 return -EINVAL;
1455
1456         if (wol.wolopts == cur_wol.wolopts &&
1457             !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1458                 return 0;
1459
1460         ret = dev->ethtool_ops->set_wol(dev, &wol);
1461         if (ret)
1462                 return ret;
1463
1464         dev->wol_enabled = !!wol.wolopts;
1465         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1466
1467         return 0;
1468 }
1469
1470 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1471 {
1472         struct ethtool_eee edata;
1473         int rc;
1474
1475         if (!dev->ethtool_ops->get_eee)
1476                 return -EOPNOTSUPP;
1477
1478         memset(&edata, 0, sizeof(struct ethtool_eee));
1479         edata.cmd = ETHTOOL_GEEE;
1480         rc = dev->ethtool_ops->get_eee(dev, &edata);
1481
1482         if (rc)
1483                 return rc;
1484
1485         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1486                 return -EFAULT;
1487
1488         return 0;
1489 }
1490
1491 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1492 {
1493         struct ethtool_eee edata;
1494         int ret;
1495
1496         if (!dev->ethtool_ops->set_eee)
1497                 return -EOPNOTSUPP;
1498
1499         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1500                 return -EFAULT;
1501
1502         ret = dev->ethtool_ops->set_eee(dev, &edata);
1503         if (!ret)
1504                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1505         return ret;
1506 }
1507
1508 static int ethtool_nway_reset(struct net_device *dev)
1509 {
1510         if (!dev->ethtool_ops->nway_reset)
1511                 return -EOPNOTSUPP;
1512
1513         return dev->ethtool_ops->nway_reset(dev);
1514 }
1515
1516 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1517 {
1518         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1519         int link = __ethtool_get_link(dev);
1520
1521         if (link < 0)
1522                 return link;
1523
1524         edata.data = link;
1525         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1526                 return -EFAULT;
1527         return 0;
1528 }
1529
1530 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1531                                   int (*getter)(struct net_device *,
1532                                                 struct ethtool_eeprom *, u8 *),
1533                                   u32 total_len)
1534 {
1535         struct ethtool_eeprom eeprom;
1536         void __user *userbuf = useraddr + sizeof(eeprom);
1537         u32 bytes_remaining;
1538         u8 *data;
1539         int ret = 0;
1540
1541         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1542                 return -EFAULT;
1543
1544         /* Check for wrap and zero */
1545         if (eeprom.offset + eeprom.len <= eeprom.offset)
1546                 return -EINVAL;
1547
1548         /* Check for exceeding total eeprom len */
1549         if (eeprom.offset + eeprom.len > total_len)
1550                 return -EINVAL;
1551
1552         data = kzalloc(PAGE_SIZE, GFP_USER);
1553         if (!data)
1554                 return -ENOMEM;
1555
1556         bytes_remaining = eeprom.len;
1557         while (bytes_remaining > 0) {
1558                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1559
1560                 ret = getter(dev, &eeprom, data);
1561                 if (ret)
1562                         break;
1563                 if (!eeprom.len) {
1564                         ret = -EIO;
1565                         break;
1566                 }
1567                 if (copy_to_user(userbuf, data, eeprom.len)) {
1568                         ret = -EFAULT;
1569                         break;
1570                 }
1571                 userbuf += eeprom.len;
1572                 eeprom.offset += eeprom.len;
1573                 bytes_remaining -= eeprom.len;
1574         }
1575
1576         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1577         eeprom.offset -= eeprom.len;
1578         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1579                 ret = -EFAULT;
1580
1581         kfree(data);
1582         return ret;
1583 }
1584
1585 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1586 {
1587         const struct ethtool_ops *ops = dev->ethtool_ops;
1588
1589         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1590             !ops->get_eeprom_len(dev))
1591                 return -EOPNOTSUPP;
1592
1593         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1594                                       ops->get_eeprom_len(dev));
1595 }
1596
1597 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1598 {
1599         struct ethtool_eeprom eeprom;
1600         const struct ethtool_ops *ops = dev->ethtool_ops;
1601         void __user *userbuf = useraddr + sizeof(eeprom);
1602         u32 bytes_remaining;
1603         u8 *data;
1604         int ret = 0;
1605
1606         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1607             !ops->get_eeprom_len(dev))
1608                 return -EOPNOTSUPP;
1609
1610         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1611                 return -EFAULT;
1612
1613         /* Check for wrap and zero */
1614         if (eeprom.offset + eeprom.len <= eeprom.offset)
1615                 return -EINVAL;
1616
1617         /* Check for exceeding total eeprom len */
1618         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1619                 return -EINVAL;
1620
1621         data = kzalloc(PAGE_SIZE, GFP_USER);
1622         if (!data)
1623                 return -ENOMEM;
1624
1625         bytes_remaining = eeprom.len;
1626         while (bytes_remaining > 0) {
1627                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1628
1629                 if (copy_from_user(data, userbuf, eeprom.len)) {
1630                         ret = -EFAULT;
1631                         break;
1632                 }
1633                 ret = ops->set_eeprom(dev, &eeprom, data);
1634                 if (ret)
1635                         break;
1636                 userbuf += eeprom.len;
1637                 eeprom.offset += eeprom.len;
1638                 bytes_remaining -= eeprom.len;
1639         }
1640
1641         kfree(data);
1642         return ret;
1643 }
1644
1645 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1646                                                    void __user *useraddr)
1647 {
1648         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1649         struct kernel_ethtool_coalesce kernel_coalesce = {};
1650         int ret;
1651
1652         if (!dev->ethtool_ops->get_coalesce)
1653                 return -EOPNOTSUPP;
1654
1655         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1656                                              NULL);
1657         if (ret)
1658                 return ret;
1659
1660         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1661                 return -EFAULT;
1662         return 0;
1663 }
1664
1665 static bool
1666 ethtool_set_coalesce_supported(struct net_device *dev,
1667                                struct ethtool_coalesce *coalesce)
1668 {
1669         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1670         u32 nonzero_params = 0;
1671
1672         if (coalesce->rx_coalesce_usecs)
1673                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1674         if (coalesce->rx_max_coalesced_frames)
1675                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1676         if (coalesce->rx_coalesce_usecs_irq)
1677                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1678         if (coalesce->rx_max_coalesced_frames_irq)
1679                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1680         if (coalesce->tx_coalesce_usecs)
1681                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1682         if (coalesce->tx_max_coalesced_frames)
1683                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1684         if (coalesce->tx_coalesce_usecs_irq)
1685                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1686         if (coalesce->tx_max_coalesced_frames_irq)
1687                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1688         if (coalesce->stats_block_coalesce_usecs)
1689                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1690         if (coalesce->use_adaptive_rx_coalesce)
1691                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1692         if (coalesce->use_adaptive_tx_coalesce)
1693                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1694         if (coalesce->pkt_rate_low)
1695                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1696         if (coalesce->rx_coalesce_usecs_low)
1697                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1698         if (coalesce->rx_max_coalesced_frames_low)
1699                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1700         if (coalesce->tx_coalesce_usecs_low)
1701                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1702         if (coalesce->tx_max_coalesced_frames_low)
1703                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1704         if (coalesce->pkt_rate_high)
1705                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1706         if (coalesce->rx_coalesce_usecs_high)
1707                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1708         if (coalesce->rx_max_coalesced_frames_high)
1709                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1710         if (coalesce->tx_coalesce_usecs_high)
1711                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1712         if (coalesce->tx_max_coalesced_frames_high)
1713                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1714         if (coalesce->rate_sample_interval)
1715                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1716
1717         return (supported_params & nonzero_params) == nonzero_params;
1718 }
1719
1720 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1721                                                    void __user *useraddr)
1722 {
1723         struct kernel_ethtool_coalesce kernel_coalesce = {};
1724         struct ethtool_coalesce coalesce;
1725         int ret;
1726
1727         if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
1728                 return -EOPNOTSUPP;
1729
1730         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1731                                              NULL);
1732         if (ret)
1733                 return ret;
1734
1735         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1736                 return -EFAULT;
1737
1738         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1739                 return -EOPNOTSUPP;
1740
1741         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1742                                              NULL);
1743         if (!ret)
1744                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1745         return ret;
1746 }
1747
1748 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1749 {
1750         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1751         struct kernel_ethtool_ringparam kernel_ringparam = {};
1752
1753         if (!dev->ethtool_ops->get_ringparam)
1754                 return -EOPNOTSUPP;
1755
1756         dev->ethtool_ops->get_ringparam(dev, &ringparam,
1757                                         &kernel_ringparam, NULL);
1758
1759         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1760                 return -EFAULT;
1761         return 0;
1762 }
1763
1764 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1765 {
1766         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1767         struct kernel_ethtool_ringparam kernel_ringparam;
1768         int ret;
1769
1770         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1771                 return -EOPNOTSUPP;
1772
1773         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1774                 return -EFAULT;
1775
1776         dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
1777
1778         /* ensure new ring parameters are within the maximums */
1779         if (ringparam.rx_pending > max.rx_max_pending ||
1780             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1781             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1782             ringparam.tx_pending > max.tx_max_pending)
1783                 return -EINVAL;
1784
1785         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
1786                                               &kernel_ringparam, NULL);
1787         if (!ret)
1788                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1789         return ret;
1790 }
1791
1792 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1793                                                    void __user *useraddr)
1794 {
1795         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1796
1797         if (!dev->ethtool_ops->get_channels)
1798                 return -EOPNOTSUPP;
1799
1800         dev->ethtool_ops->get_channels(dev, &channels);
1801
1802         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1803                 return -EFAULT;
1804         return 0;
1805 }
1806
1807 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1808                                                    void __user *useraddr)
1809 {
1810         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1811         u16 from_channel, to_channel;
1812         u64 max_rxnfc_in_use;
1813         u32 max_rxfh_in_use;
1814         unsigned int i;
1815         int ret;
1816
1817         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1818                 return -EOPNOTSUPP;
1819
1820         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1821                 return -EFAULT;
1822
1823         dev->ethtool_ops->get_channels(dev, &curr);
1824
1825         if (channels.rx_count == curr.rx_count &&
1826             channels.tx_count == curr.tx_count &&
1827             channels.combined_count == curr.combined_count &&
1828             channels.other_count == curr.other_count)
1829                 return 0;
1830
1831         /* ensure new counts are within the maximums */
1832         if (channels.rx_count > curr.max_rx ||
1833             channels.tx_count > curr.max_tx ||
1834             channels.combined_count > curr.max_combined ||
1835             channels.other_count > curr.max_other)
1836                 return -EINVAL;
1837
1838         /* ensure there is at least one RX and one TX channel */
1839         if (!channels.combined_count &&
1840             (!channels.rx_count || !channels.tx_count))
1841                 return -EINVAL;
1842
1843         /* ensure the new Rx count fits within the configured Rx flow
1844          * indirection table/rxnfc settings */
1845         if (ethtool_get_max_rxnfc_channel(dev, &max_rxnfc_in_use))
1846                 max_rxnfc_in_use = 0;
1847         if (!netif_is_rxfh_configured(dev) ||
1848             ethtool_get_max_rxfh_channel(dev, &max_rxfh_in_use))
1849                 max_rxfh_in_use = 0;
1850         if (channels.combined_count + channels.rx_count <=
1851             max_t(u64, max_rxnfc_in_use, max_rxfh_in_use))
1852                 return -EINVAL;
1853
1854         /* Disabling channels, query zero-copy AF_XDP sockets */
1855         from_channel = channels.combined_count +
1856                 min(channels.rx_count, channels.tx_count);
1857         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1858         for (i = from_channel; i < to_channel; i++)
1859                 if (xsk_get_pool_from_qid(dev, i))
1860                         return -EINVAL;
1861
1862         ret = dev->ethtool_ops->set_channels(dev, &channels);
1863         if (!ret)
1864                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1865         return ret;
1866 }
1867
1868 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1869 {
1870         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1871
1872         if (!dev->ethtool_ops->get_pauseparam)
1873                 return -EOPNOTSUPP;
1874
1875         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1876
1877         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1878                 return -EFAULT;
1879         return 0;
1880 }
1881
1882 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1883 {
1884         struct ethtool_pauseparam pauseparam;
1885         int ret;
1886
1887         if (!dev->ethtool_ops->set_pauseparam)
1888                 return -EOPNOTSUPP;
1889
1890         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1891                 return -EFAULT;
1892
1893         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1894         if (!ret)
1895                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1896         return ret;
1897 }
1898
1899 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1900 {
1901         struct ethtool_test test;
1902         const struct ethtool_ops *ops = dev->ethtool_ops;
1903         u64 *data;
1904         int ret, test_len;
1905
1906         if (!ops->self_test || !ops->get_sset_count)
1907                 return -EOPNOTSUPP;
1908
1909         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1910         if (test_len < 0)
1911                 return test_len;
1912         WARN_ON(test_len == 0);
1913
1914         if (copy_from_user(&test, useraddr, sizeof(test)))
1915                 return -EFAULT;
1916
1917         test.len = test_len;
1918         data = kcalloc(test_len, sizeof(u64), GFP_USER);
1919         if (!data)
1920                 return -ENOMEM;
1921
1922         netif_testing_on(dev);
1923         ops->self_test(dev, &test, data);
1924         netif_testing_off(dev);
1925
1926         ret = -EFAULT;
1927         if (copy_to_user(useraddr, &test, sizeof(test)))
1928                 goto out;
1929         useraddr += sizeof(test);
1930         if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
1931                 goto out;
1932         ret = 0;
1933
1934  out:
1935         kfree(data);
1936         return ret;
1937 }
1938
1939 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1940 {
1941         struct ethtool_gstrings gstrings;
1942         u8 *data;
1943         int ret;
1944
1945         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1946                 return -EFAULT;
1947
1948         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1949         if (ret < 0)
1950                 return ret;
1951         if (ret > S32_MAX / ETH_GSTRING_LEN)
1952                 return -ENOMEM;
1953         WARN_ON_ONCE(!ret);
1954
1955         gstrings.len = ret;
1956
1957         if (gstrings.len) {
1958                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1959                 if (!data)
1960                         return -ENOMEM;
1961
1962                 __ethtool_get_strings(dev, gstrings.string_set, data);
1963         } else {
1964                 data = NULL;
1965         }
1966
1967         ret = -EFAULT;
1968         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1969                 goto out;
1970         useraddr += sizeof(gstrings);
1971         if (gstrings.len &&
1972             copy_to_user(useraddr, data,
1973                          array_size(gstrings.len, ETH_GSTRING_LEN)))
1974                 goto out;
1975         ret = 0;
1976
1977 out:
1978         vfree(data);
1979         return ret;
1980 }
1981
1982 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
1983 {
1984         va_list args;
1985
1986         va_start(args, fmt);
1987         vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
1988         va_end(args);
1989
1990         *data += ETH_GSTRING_LEN;
1991 }
1992 EXPORT_SYMBOL(ethtool_sprintf);
1993
1994 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1995 {
1996         struct ethtool_value id;
1997         static bool busy;
1998         const struct ethtool_ops *ops = dev->ethtool_ops;
1999         netdevice_tracker dev_tracker;
2000         int rc;
2001
2002         if (!ops->set_phys_id)
2003                 return -EOPNOTSUPP;
2004
2005         if (busy)
2006                 return -EBUSY;
2007
2008         if (copy_from_user(&id, useraddr, sizeof(id)))
2009                 return -EFAULT;
2010
2011         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2012         if (rc < 0)
2013                 return rc;
2014
2015         /* Drop the RTNL lock while waiting, but prevent reentry or
2016          * removal of the device.
2017          */
2018         busy = true;
2019         netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2020         rtnl_unlock();
2021
2022         if (rc == 0) {
2023                 /* Driver will handle this itself */
2024                 schedule_timeout_interruptible(
2025                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2026         } else {
2027                 /* Driver expects to be called at twice the frequency in rc */
2028                 int n = rc * 2, interval = HZ / n;
2029                 u64 count = mul_u32_u32(n, id.data);
2030                 u64 i = 0;
2031
2032                 do {
2033                         rtnl_lock();
2034                         rc = ops->set_phys_id(dev,
2035                                     (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2036                         rtnl_unlock();
2037                         if (rc)
2038                                 break;
2039                         schedule_timeout_interruptible(interval);
2040                 } while (!signal_pending(current) && (!id.data || i < count));
2041         }
2042
2043         rtnl_lock();
2044         netdev_put(dev, &dev_tracker);
2045         busy = false;
2046
2047         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2048         return rc;
2049 }
2050
2051 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2052 {
2053         struct ethtool_stats stats;
2054         const struct ethtool_ops *ops = dev->ethtool_ops;
2055         u64 *data;
2056         int ret, n_stats;
2057
2058         if (!ops->get_ethtool_stats || !ops->get_sset_count)
2059                 return -EOPNOTSUPP;
2060
2061         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2062         if (n_stats < 0)
2063                 return n_stats;
2064         if (n_stats > S32_MAX / sizeof(u64))
2065                 return -ENOMEM;
2066         WARN_ON_ONCE(!n_stats);
2067         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2068                 return -EFAULT;
2069
2070         stats.n_stats = n_stats;
2071
2072         if (n_stats) {
2073                 data = vzalloc(array_size(n_stats, sizeof(u64)));
2074                 if (!data)
2075                         return -ENOMEM;
2076                 ops->get_ethtool_stats(dev, &stats, data);
2077         } else {
2078                 data = NULL;
2079         }
2080
2081         ret = -EFAULT;
2082         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2083                 goto out;
2084         useraddr += sizeof(stats);
2085         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2086                 goto out;
2087         ret = 0;
2088
2089  out:
2090         vfree(data);
2091         return ret;
2092 }
2093
2094 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2095 {
2096         if (n_stats < 0)
2097                 return n_stats;
2098         if (n_stats > S32_MAX / sizeof(u64))
2099                 return -ENOMEM;
2100         if (WARN_ON_ONCE(!n_stats))
2101                 return -EOPNOTSUPP;
2102
2103         *data = vzalloc(array_size(n_stats, sizeof(u64)));
2104         if (!*data)
2105                 return -ENOMEM;
2106
2107         return 0;
2108 }
2109
2110 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2111                                          struct ethtool_stats *stats,
2112                                          u64 **data)
2113  {
2114         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2115         int n_stats, ret;
2116
2117         if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2118                 return -EOPNOTSUPP;
2119
2120         n_stats = phy_ops->get_sset_count(phydev);
2121
2122         ret = ethtool_vzalloc_stats_array(n_stats, data);
2123         if (ret)
2124                 return ret;
2125
2126         stats->n_stats = n_stats;
2127         return phy_ops->get_stats(phydev, stats, *data);
2128 }
2129
2130 static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2131                                           struct ethtool_stats *stats,
2132                                           u64 **data)
2133 {
2134         const struct ethtool_ops *ops = dev->ethtool_ops;
2135         int n_stats, ret;
2136
2137         if (!ops || !ops->get_sset_count || ops->get_ethtool_phy_stats)
2138                 return -EOPNOTSUPP;
2139
2140         n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2141
2142         ret = ethtool_vzalloc_stats_array(n_stats, data);
2143         if (ret)
2144                 return ret;
2145
2146         stats->n_stats = n_stats;
2147         ops->get_ethtool_phy_stats(dev, stats, *data);
2148
2149         return 0;
2150 }
2151
2152 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2153 {
2154         struct phy_device *phydev = dev->phydev;
2155         struct ethtool_stats stats;
2156         u64 *data = NULL;
2157         int ret = -EOPNOTSUPP;
2158
2159         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2160                 return -EFAULT;
2161
2162         if (phydev)
2163                 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2164
2165         if (ret == -EOPNOTSUPP)
2166                 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2167
2168         if (ret)
2169                 goto out;
2170
2171         if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2172                 ret = -EFAULT;
2173                 goto out;
2174         }
2175
2176         useraddr += sizeof(stats);
2177         if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2178                 ret = -EFAULT;
2179
2180  out:
2181         vfree(data);
2182         return ret;
2183 }
2184
2185 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2186 {
2187         struct ethtool_perm_addr epaddr;
2188
2189         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2190                 return -EFAULT;
2191
2192         if (epaddr.size < dev->addr_len)
2193                 return -ETOOSMALL;
2194         epaddr.size = dev->addr_len;
2195
2196         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2197                 return -EFAULT;
2198         useraddr += sizeof(epaddr);
2199         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2200                 return -EFAULT;
2201         return 0;
2202 }
2203
2204 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2205                              u32 cmd, u32 (*actor)(struct net_device *))
2206 {
2207         struct ethtool_value edata = { .cmd = cmd };
2208
2209         if (!actor)
2210                 return -EOPNOTSUPP;
2211
2212         edata.data = actor(dev);
2213
2214         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2215                 return -EFAULT;
2216         return 0;
2217 }
2218
2219 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2220                              void (*actor)(struct net_device *, u32))
2221 {
2222         struct ethtool_value edata;
2223
2224         if (!actor)
2225                 return -EOPNOTSUPP;
2226
2227         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2228                 return -EFAULT;
2229
2230         actor(dev, edata.data);
2231         return 0;
2232 }
2233
2234 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2235                              int (*actor)(struct net_device *, u32))
2236 {
2237         struct ethtool_value edata;
2238
2239         if (!actor)
2240                 return -EOPNOTSUPP;
2241
2242         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2243                 return -EFAULT;
2244
2245         return actor(dev, edata.data);
2246 }
2247
2248 static int
2249 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2250 {
2251         if (!dev->ethtool_ops->flash_device) {
2252                 req->devlink = netdev_to_devlink_get(dev);
2253                 return 0;
2254         }
2255
2256         return dev->ethtool_ops->flash_device(dev, &req->efl);
2257 }
2258
2259 static int ethtool_set_dump(struct net_device *dev,
2260                         void __user *useraddr)
2261 {
2262         struct ethtool_dump dump;
2263
2264         if (!dev->ethtool_ops->set_dump)
2265                 return -EOPNOTSUPP;
2266
2267         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2268                 return -EFAULT;
2269
2270         return dev->ethtool_ops->set_dump(dev, &dump);
2271 }
2272
2273 static int ethtool_get_dump_flag(struct net_device *dev,
2274                                 void __user *useraddr)
2275 {
2276         int ret;
2277         struct ethtool_dump dump;
2278         const struct ethtool_ops *ops = dev->ethtool_ops;
2279
2280         if (!ops->get_dump_flag)
2281                 return -EOPNOTSUPP;
2282
2283         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2284                 return -EFAULT;
2285
2286         ret = ops->get_dump_flag(dev, &dump);
2287         if (ret)
2288                 return ret;
2289
2290         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2291                 return -EFAULT;
2292         return 0;
2293 }
2294
2295 static int ethtool_get_dump_data(struct net_device *dev,
2296                                 void __user *useraddr)
2297 {
2298         int ret;
2299         __u32 len;
2300         struct ethtool_dump dump, tmp;
2301         const struct ethtool_ops *ops = dev->ethtool_ops;
2302         void *data = NULL;
2303
2304         if (!ops->get_dump_data || !ops->get_dump_flag)
2305                 return -EOPNOTSUPP;
2306
2307         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2308                 return -EFAULT;
2309
2310         memset(&tmp, 0, sizeof(tmp));
2311         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2312         ret = ops->get_dump_flag(dev, &tmp);
2313         if (ret)
2314                 return ret;
2315
2316         len = min(tmp.len, dump.len);
2317         if (!len)
2318                 return -EFAULT;
2319
2320         /* Don't ever let the driver think there's more space available
2321          * than it requested with .get_dump_flag().
2322          */
2323         dump.len = len;
2324
2325         /* Always allocate enough space to hold the whole thing so that the
2326          * driver does not need to check the length and bother with partial
2327          * dumping.
2328          */
2329         data = vzalloc(tmp.len);
2330         if (!data)
2331                 return -ENOMEM;
2332         ret = ops->get_dump_data(dev, &dump, data);
2333         if (ret)
2334                 goto out;
2335
2336         /* There are two sane possibilities:
2337          * 1. The driver's .get_dump_data() does not touch dump.len.
2338          * 2. Or it may set dump.len to how much it really writes, which
2339          *    should be tmp.len (or len if it can do a partial dump).
2340          * In any case respond to userspace with the actual length of data
2341          * it's receiving.
2342          */
2343         WARN_ON(dump.len != len && dump.len != tmp.len);
2344         dump.len = len;
2345
2346         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2347                 ret = -EFAULT;
2348                 goto out;
2349         }
2350         useraddr += offsetof(struct ethtool_dump, data);
2351         if (copy_to_user(useraddr, data, len))
2352                 ret = -EFAULT;
2353 out:
2354         vfree(data);
2355         return ret;
2356 }
2357
2358 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2359 {
2360         struct ethtool_ts_info info;
2361         int err;
2362
2363         err = __ethtool_get_ts_info(dev, &info);
2364         if (err)
2365                 return err;
2366
2367         if (copy_to_user(useraddr, &info, sizeof(info)))
2368                 return -EFAULT;
2369
2370         return 0;
2371 }
2372
2373 int ethtool_get_module_info_call(struct net_device *dev,
2374                                  struct ethtool_modinfo *modinfo)
2375 {
2376         const struct ethtool_ops *ops = dev->ethtool_ops;
2377         struct phy_device *phydev = dev->phydev;
2378
2379         if (dev->sfp_bus)
2380                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2381
2382         if (phydev && phydev->drv && phydev->drv->module_info)
2383                 return phydev->drv->module_info(phydev, modinfo);
2384
2385         if (ops->get_module_info)
2386                 return ops->get_module_info(dev, modinfo);
2387
2388         return -EOPNOTSUPP;
2389 }
2390
2391 static int ethtool_get_module_info(struct net_device *dev,
2392                                    void __user *useraddr)
2393 {
2394         int ret;
2395         struct ethtool_modinfo modinfo;
2396
2397         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2398                 return -EFAULT;
2399
2400         ret = ethtool_get_module_info_call(dev, &modinfo);
2401         if (ret)
2402                 return ret;
2403
2404         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2405                 return -EFAULT;
2406
2407         return 0;
2408 }
2409
2410 int ethtool_get_module_eeprom_call(struct net_device *dev,
2411                                    struct ethtool_eeprom *ee, u8 *data)
2412 {
2413         const struct ethtool_ops *ops = dev->ethtool_ops;
2414         struct phy_device *phydev = dev->phydev;
2415
2416         if (dev->sfp_bus)
2417                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2418
2419         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2420                 return phydev->drv->module_eeprom(phydev, ee, data);
2421
2422         if (ops->get_module_eeprom)
2423                 return ops->get_module_eeprom(dev, ee, data);
2424
2425         return -EOPNOTSUPP;
2426 }
2427
2428 static int ethtool_get_module_eeprom(struct net_device *dev,
2429                                      void __user *useraddr)
2430 {
2431         int ret;
2432         struct ethtool_modinfo modinfo;
2433
2434         ret = ethtool_get_module_info_call(dev, &modinfo);
2435         if (ret)
2436                 return ret;
2437
2438         return ethtool_get_any_eeprom(dev, useraddr,
2439                                       ethtool_get_module_eeprom_call,
2440                                       modinfo.eeprom_len);
2441 }
2442
2443 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2444 {
2445         switch (tuna->id) {
2446         case ETHTOOL_RX_COPYBREAK:
2447         case ETHTOOL_TX_COPYBREAK:
2448         case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2449                 if (tuna->len != sizeof(u32) ||
2450                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2451                         return -EINVAL;
2452                 break;
2453         case ETHTOOL_PFC_PREVENTION_TOUT:
2454                 if (tuna->len != sizeof(u16) ||
2455                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2456                         return -EINVAL;
2457                 break;
2458         default:
2459                 return -EINVAL;
2460         }
2461
2462         return 0;
2463 }
2464
2465 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2466 {
2467         int ret;
2468         struct ethtool_tunable tuna;
2469         const struct ethtool_ops *ops = dev->ethtool_ops;
2470         void *data;
2471
2472         if (!ops->get_tunable)
2473                 return -EOPNOTSUPP;
2474         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2475                 return -EFAULT;
2476         ret = ethtool_tunable_valid(&tuna);
2477         if (ret)
2478                 return ret;
2479         data = kzalloc(tuna.len, GFP_USER);
2480         if (!data)
2481                 return -ENOMEM;
2482         ret = ops->get_tunable(dev, &tuna, data);
2483         if (ret)
2484                 goto out;
2485         useraddr += sizeof(tuna);
2486         ret = -EFAULT;
2487         if (copy_to_user(useraddr, data, tuna.len))
2488                 goto out;
2489         ret = 0;
2490
2491 out:
2492         kfree(data);
2493         return ret;
2494 }
2495
2496 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2497 {
2498         int ret;
2499         struct ethtool_tunable tuna;
2500         const struct ethtool_ops *ops = dev->ethtool_ops;
2501         void *data;
2502
2503         if (!ops->set_tunable)
2504                 return -EOPNOTSUPP;
2505         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2506                 return -EFAULT;
2507         ret = ethtool_tunable_valid(&tuna);
2508         if (ret)
2509                 return ret;
2510         useraddr += sizeof(tuna);
2511         data = memdup_user(useraddr, tuna.len);
2512         if (IS_ERR(data))
2513                 return PTR_ERR(data);
2514         ret = ops->set_tunable(dev, &tuna, data);
2515
2516         kfree(data);
2517         return ret;
2518 }
2519
2520 static noinline_for_stack int
2521 ethtool_get_per_queue_coalesce(struct net_device *dev,
2522                                void __user *useraddr,
2523                                struct ethtool_per_queue_op *per_queue_opt)
2524 {
2525         u32 bit;
2526         int ret;
2527         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2528
2529         if (!dev->ethtool_ops->get_per_queue_coalesce)
2530                 return -EOPNOTSUPP;
2531
2532         useraddr += sizeof(*per_queue_opt);
2533
2534         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2535                           MAX_NUM_QUEUE);
2536
2537         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2538                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2539
2540                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2541                 if (ret != 0)
2542                         return ret;
2543                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2544                         return -EFAULT;
2545                 useraddr += sizeof(coalesce);
2546         }
2547
2548         return 0;
2549 }
2550
2551 static noinline_for_stack int
2552 ethtool_set_per_queue_coalesce(struct net_device *dev,
2553                                void __user *useraddr,
2554                                struct ethtool_per_queue_op *per_queue_opt)
2555 {
2556         u32 bit;
2557         int i, ret = 0;
2558         int n_queue;
2559         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2560         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2561
2562         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2563             (!dev->ethtool_ops->get_per_queue_coalesce))
2564                 return -EOPNOTSUPP;
2565
2566         useraddr += sizeof(*per_queue_opt);
2567
2568         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2569         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2570         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2571         if (!backup)
2572                 return -ENOMEM;
2573
2574         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2575                 struct ethtool_coalesce coalesce;
2576
2577                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2578                 if (ret != 0)
2579                         goto roll_back;
2580
2581                 tmp++;
2582
2583                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2584                         ret = -EFAULT;
2585                         goto roll_back;
2586                 }
2587
2588                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2589                         ret = -EOPNOTSUPP;
2590                         goto roll_back;
2591                 }
2592
2593                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2594                 if (ret != 0)
2595                         goto roll_back;
2596
2597                 useraddr += sizeof(coalesce);
2598         }
2599
2600 roll_back:
2601         if (ret != 0) {
2602                 tmp = backup;
2603                 for_each_set_bit(i, queue_mask, bit) {
2604                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2605                         tmp++;
2606                 }
2607         }
2608         kfree(backup);
2609
2610         return ret;
2611 }
2612
2613 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2614                                  void __user *useraddr, u32 sub_cmd)
2615 {
2616         struct ethtool_per_queue_op per_queue_opt;
2617
2618         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2619                 return -EFAULT;
2620
2621         if (per_queue_opt.sub_command != sub_cmd)
2622                 return -EINVAL;
2623
2624         switch (per_queue_opt.sub_command) {
2625         case ETHTOOL_GCOALESCE:
2626                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2627         case ETHTOOL_SCOALESCE:
2628                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2629         default:
2630                 return -EOPNOTSUPP;
2631         }
2632 }
2633
2634 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2635 {
2636         switch (tuna->id) {
2637         case ETHTOOL_PHY_DOWNSHIFT:
2638         case ETHTOOL_PHY_FAST_LINK_DOWN:
2639                 if (tuna->len != sizeof(u8) ||
2640                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2641                         return -EINVAL;
2642                 break;
2643         case ETHTOOL_PHY_EDPD:
2644                 if (tuna->len != sizeof(u16) ||
2645                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2646                         return -EINVAL;
2647                 break;
2648         default:
2649                 return -EINVAL;
2650         }
2651
2652         return 0;
2653 }
2654
2655 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2656 {
2657         struct phy_device *phydev = dev->phydev;
2658         struct ethtool_tunable tuna;
2659         bool phy_drv_tunable;
2660         void *data;
2661         int ret;
2662
2663         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2664         if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2665                 return -EOPNOTSUPP;
2666         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2667                 return -EFAULT;
2668         ret = ethtool_phy_tunable_valid(&tuna);
2669         if (ret)
2670                 return ret;
2671         data = kzalloc(tuna.len, GFP_USER);
2672         if (!data)
2673                 return -ENOMEM;
2674         if (phy_drv_tunable) {
2675                 mutex_lock(&phydev->lock);
2676                 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2677                 mutex_unlock(&phydev->lock);
2678         } else {
2679                 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2680         }
2681         if (ret)
2682                 goto out;
2683         useraddr += sizeof(tuna);
2684         ret = -EFAULT;
2685         if (copy_to_user(useraddr, data, tuna.len))
2686                 goto out;
2687         ret = 0;
2688
2689 out:
2690         kfree(data);
2691         return ret;
2692 }
2693
2694 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2695 {
2696         struct phy_device *phydev = dev->phydev;
2697         struct ethtool_tunable tuna;
2698         bool phy_drv_tunable;
2699         void *data;
2700         int ret;
2701
2702         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2703         if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2704                 return -EOPNOTSUPP;
2705         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2706                 return -EFAULT;
2707         ret = ethtool_phy_tunable_valid(&tuna);
2708         if (ret)
2709                 return ret;
2710         useraddr += sizeof(tuna);
2711         data = memdup_user(useraddr, tuna.len);
2712         if (IS_ERR(data))
2713                 return PTR_ERR(data);
2714         if (phy_drv_tunable) {
2715                 mutex_lock(&phydev->lock);
2716                 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2717                 mutex_unlock(&phydev->lock);
2718         } else {
2719                 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2720         }
2721
2722         kfree(data);
2723         return ret;
2724 }
2725
2726 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2727 {
2728         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2729         int rc;
2730
2731         if (!dev->ethtool_ops->get_fecparam)
2732                 return -EOPNOTSUPP;
2733
2734         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2735         if (rc)
2736                 return rc;
2737
2738         if (WARN_ON_ONCE(fecparam.reserved))
2739                 fecparam.reserved = 0;
2740
2741         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2742                 return -EFAULT;
2743         return 0;
2744 }
2745
2746 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2747 {
2748         struct ethtool_fecparam fecparam;
2749
2750         if (!dev->ethtool_ops->set_fecparam)
2751                 return -EOPNOTSUPP;
2752
2753         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2754                 return -EFAULT;
2755
2756         if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2757                 return -EINVAL;
2758
2759         fecparam.active_fec = 0;
2760         fecparam.reserved = 0;
2761
2762         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2763 }
2764
2765 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2766
2767 static int
2768 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2769               u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2770 {
2771         struct net_device *dev;
2772         u32 sub_cmd;
2773         int rc;
2774         netdev_features_t old_features;
2775
2776         dev = __dev_get_by_name(net, ifr->ifr_name);
2777         if (!dev)
2778                 return -ENODEV;
2779
2780         if (ethcmd == ETHTOOL_PERQUEUE) {
2781                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2782                         return -EFAULT;
2783         } else {
2784                 sub_cmd = ethcmd;
2785         }
2786         /* Allow some commands to be done by anyone */
2787         switch (sub_cmd) {
2788         case ETHTOOL_GSET:
2789         case ETHTOOL_GDRVINFO:
2790         case ETHTOOL_GMSGLVL:
2791         case ETHTOOL_GLINK:
2792         case ETHTOOL_GCOALESCE:
2793         case ETHTOOL_GRINGPARAM:
2794         case ETHTOOL_GPAUSEPARAM:
2795         case ETHTOOL_GRXCSUM:
2796         case ETHTOOL_GTXCSUM:
2797         case ETHTOOL_GSG:
2798         case ETHTOOL_GSSET_INFO:
2799         case ETHTOOL_GSTRINGS:
2800         case ETHTOOL_GSTATS:
2801         case ETHTOOL_GPHYSTATS:
2802         case ETHTOOL_GTSO:
2803         case ETHTOOL_GPERMADDR:
2804         case ETHTOOL_GUFO:
2805         case ETHTOOL_GGSO:
2806         case ETHTOOL_GGRO:
2807         case ETHTOOL_GFLAGS:
2808         case ETHTOOL_GPFLAGS:
2809         case ETHTOOL_GRXFH:
2810         case ETHTOOL_GRXRINGS:
2811         case ETHTOOL_GRXCLSRLCNT:
2812         case ETHTOOL_GRXCLSRULE:
2813         case ETHTOOL_GRXCLSRLALL:
2814         case ETHTOOL_GRXFHINDIR:
2815         case ETHTOOL_GRSSH:
2816         case ETHTOOL_GFEATURES:
2817         case ETHTOOL_GCHANNELS:
2818         case ETHTOOL_GET_TS_INFO:
2819         case ETHTOOL_GEEE:
2820         case ETHTOOL_GTUNABLE:
2821         case ETHTOOL_PHY_GTUNABLE:
2822         case ETHTOOL_GLINKSETTINGS:
2823         case ETHTOOL_GFECPARAM:
2824                 break;
2825         default:
2826                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2827                         return -EPERM;
2828         }
2829
2830         if (dev->dev.parent)
2831                 pm_runtime_get_sync(dev->dev.parent);
2832
2833         if (!netif_device_present(dev)) {
2834                 rc = -ENODEV;
2835                 goto out;
2836         }
2837
2838         if (dev->ethtool_ops->begin) {
2839                 rc = dev->ethtool_ops->begin(dev);
2840                 if (rc < 0)
2841                         goto out;
2842         }
2843         old_features = dev->features;
2844
2845         switch (ethcmd) {
2846         case ETHTOOL_GSET:
2847                 rc = ethtool_get_settings(dev, useraddr);
2848                 break;
2849         case ETHTOOL_SSET:
2850                 rc = ethtool_set_settings(dev, useraddr);
2851                 break;
2852         case ETHTOOL_GDRVINFO:
2853                 rc = ethtool_get_drvinfo(dev, devlink_state);
2854                 break;
2855         case ETHTOOL_GREGS:
2856                 rc = ethtool_get_regs(dev, useraddr);
2857                 break;
2858         case ETHTOOL_GWOL:
2859                 rc = ethtool_get_wol(dev, useraddr);
2860                 break;
2861         case ETHTOOL_SWOL:
2862                 rc = ethtool_set_wol(dev, useraddr);
2863                 break;
2864         case ETHTOOL_GMSGLVL:
2865                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2866                                        dev->ethtool_ops->get_msglevel);
2867                 break;
2868         case ETHTOOL_SMSGLVL:
2869                 rc = ethtool_set_value_void(dev, useraddr,
2870                                        dev->ethtool_ops->set_msglevel);
2871                 if (!rc)
2872                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2873                 break;
2874         case ETHTOOL_GEEE:
2875                 rc = ethtool_get_eee(dev, useraddr);
2876                 break;
2877         case ETHTOOL_SEEE:
2878                 rc = ethtool_set_eee(dev, useraddr);
2879                 break;
2880         case ETHTOOL_NWAY_RST:
2881                 rc = ethtool_nway_reset(dev);
2882                 break;
2883         case ETHTOOL_GLINK:
2884                 rc = ethtool_get_link(dev, useraddr);
2885                 break;
2886         case ETHTOOL_GEEPROM:
2887                 rc = ethtool_get_eeprom(dev, useraddr);
2888                 break;
2889         case ETHTOOL_SEEPROM:
2890                 rc = ethtool_set_eeprom(dev, useraddr);
2891                 break;
2892         case ETHTOOL_GCOALESCE:
2893                 rc = ethtool_get_coalesce(dev, useraddr);
2894                 break;
2895         case ETHTOOL_SCOALESCE:
2896                 rc = ethtool_set_coalesce(dev, useraddr);
2897                 break;
2898         case ETHTOOL_GRINGPARAM:
2899                 rc = ethtool_get_ringparam(dev, useraddr);
2900                 break;
2901         case ETHTOOL_SRINGPARAM:
2902                 rc = ethtool_set_ringparam(dev, useraddr);
2903                 break;
2904         case ETHTOOL_GPAUSEPARAM:
2905                 rc = ethtool_get_pauseparam(dev, useraddr);
2906                 break;
2907         case ETHTOOL_SPAUSEPARAM:
2908                 rc = ethtool_set_pauseparam(dev, useraddr);
2909                 break;
2910         case ETHTOOL_TEST:
2911                 rc = ethtool_self_test(dev, useraddr);
2912                 break;
2913         case ETHTOOL_GSTRINGS:
2914                 rc = ethtool_get_strings(dev, useraddr);
2915                 break;
2916         case ETHTOOL_PHYS_ID:
2917                 rc = ethtool_phys_id(dev, useraddr);
2918                 break;
2919         case ETHTOOL_GSTATS:
2920                 rc = ethtool_get_stats(dev, useraddr);
2921                 break;
2922         case ETHTOOL_GPERMADDR:
2923                 rc = ethtool_get_perm_addr(dev, useraddr);
2924                 break;
2925         case ETHTOOL_GFLAGS:
2926                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2927                                         __ethtool_get_flags);
2928                 break;
2929         case ETHTOOL_SFLAGS:
2930                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2931                 break;
2932         case ETHTOOL_GPFLAGS:
2933                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2934                                        dev->ethtool_ops->get_priv_flags);
2935                 if (!rc)
2936                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2937                 break;
2938         case ETHTOOL_SPFLAGS:
2939                 rc = ethtool_set_value(dev, useraddr,
2940                                        dev->ethtool_ops->set_priv_flags);
2941                 break;
2942         case ETHTOOL_GRXFH:
2943         case ETHTOOL_GRXRINGS:
2944         case ETHTOOL_GRXCLSRLCNT:
2945         case ETHTOOL_GRXCLSRULE:
2946         case ETHTOOL_GRXCLSRLALL:
2947                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2948                 break;
2949         case ETHTOOL_SRXFH:
2950         case ETHTOOL_SRXCLSRLDEL:
2951         case ETHTOOL_SRXCLSRLINS:
2952                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2953                 break;
2954         case ETHTOOL_FLASHDEV:
2955                 rc = ethtool_flash_device(dev, devlink_state);
2956                 break;
2957         case ETHTOOL_RESET:
2958                 rc = ethtool_reset(dev, useraddr);
2959                 break;
2960         case ETHTOOL_GSSET_INFO:
2961                 rc = ethtool_get_sset_info(dev, useraddr);
2962                 break;
2963         case ETHTOOL_GRXFHINDIR:
2964                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2965                 break;
2966         case ETHTOOL_SRXFHINDIR:
2967                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2968                 break;
2969         case ETHTOOL_GRSSH:
2970                 rc = ethtool_get_rxfh(dev, useraddr);
2971                 break;
2972         case ETHTOOL_SRSSH:
2973                 rc = ethtool_set_rxfh(dev, useraddr);
2974                 break;
2975         case ETHTOOL_GFEATURES:
2976                 rc = ethtool_get_features(dev, useraddr);
2977                 break;
2978         case ETHTOOL_SFEATURES:
2979                 rc = ethtool_set_features(dev, useraddr);
2980                 break;
2981         case ETHTOOL_GTXCSUM:
2982         case ETHTOOL_GRXCSUM:
2983         case ETHTOOL_GSG:
2984         case ETHTOOL_GTSO:
2985         case ETHTOOL_GGSO:
2986         case ETHTOOL_GGRO:
2987                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2988                 break;
2989         case ETHTOOL_STXCSUM:
2990         case ETHTOOL_SRXCSUM:
2991         case ETHTOOL_SSG:
2992         case ETHTOOL_STSO:
2993         case ETHTOOL_SGSO:
2994         case ETHTOOL_SGRO:
2995                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2996                 break;
2997         case ETHTOOL_GCHANNELS:
2998                 rc = ethtool_get_channels(dev, useraddr);
2999                 break;
3000         case ETHTOOL_SCHANNELS:
3001                 rc = ethtool_set_channels(dev, useraddr);
3002                 break;
3003         case ETHTOOL_SET_DUMP:
3004                 rc = ethtool_set_dump(dev, useraddr);
3005                 break;
3006         case ETHTOOL_GET_DUMP_FLAG:
3007                 rc = ethtool_get_dump_flag(dev, useraddr);
3008                 break;
3009         case ETHTOOL_GET_DUMP_DATA:
3010                 rc = ethtool_get_dump_data(dev, useraddr);
3011                 break;
3012         case ETHTOOL_GET_TS_INFO:
3013                 rc = ethtool_get_ts_info(dev, useraddr);
3014                 break;
3015         case ETHTOOL_GMODULEINFO:
3016                 rc = ethtool_get_module_info(dev, useraddr);
3017                 break;
3018         case ETHTOOL_GMODULEEEPROM:
3019                 rc = ethtool_get_module_eeprom(dev, useraddr);
3020                 break;
3021         case ETHTOOL_GTUNABLE:
3022                 rc = ethtool_get_tunable(dev, useraddr);
3023                 break;
3024         case ETHTOOL_STUNABLE:
3025                 rc = ethtool_set_tunable(dev, useraddr);
3026                 break;
3027         case ETHTOOL_GPHYSTATS:
3028                 rc = ethtool_get_phy_stats(dev, useraddr);
3029                 break;
3030         case ETHTOOL_PERQUEUE:
3031                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3032                 break;
3033         case ETHTOOL_GLINKSETTINGS:
3034                 rc = ethtool_get_link_ksettings(dev, useraddr);
3035                 break;
3036         case ETHTOOL_SLINKSETTINGS:
3037                 rc = ethtool_set_link_ksettings(dev, useraddr);
3038                 break;
3039         case ETHTOOL_PHY_GTUNABLE:
3040                 rc = get_phy_tunable(dev, useraddr);
3041                 break;
3042         case ETHTOOL_PHY_STUNABLE:
3043                 rc = set_phy_tunable(dev, useraddr);
3044                 break;
3045         case ETHTOOL_GFECPARAM:
3046                 rc = ethtool_get_fecparam(dev, useraddr);
3047                 break;
3048         case ETHTOOL_SFECPARAM:
3049                 rc = ethtool_set_fecparam(dev, useraddr);
3050                 break;
3051         default:
3052                 rc = -EOPNOTSUPP;
3053         }
3054
3055         if (dev->ethtool_ops->complete)
3056                 dev->ethtool_ops->complete(dev);
3057
3058         if (old_features != dev->features)
3059                 netdev_features_change(dev);
3060 out:
3061         if (dev->dev.parent)
3062                 pm_runtime_put(dev->dev.parent);
3063
3064         return rc;
3065 }
3066
3067 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3068 {
3069         struct ethtool_devlink_compat *state;
3070         u32 ethcmd;
3071         int rc;
3072
3073         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3074                 return -EFAULT;
3075
3076         state = kzalloc(sizeof(*state), GFP_KERNEL);
3077         if (!state)
3078                 return -ENOMEM;
3079
3080         switch (ethcmd) {
3081         case ETHTOOL_FLASHDEV:
3082                 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3083                         rc = -EFAULT;
3084                         goto exit_free;
3085                 }
3086                 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3087                 break;
3088         }
3089
3090         rtnl_lock();
3091         rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3092         rtnl_unlock();
3093         if (rc)
3094                 goto exit_free;
3095
3096         switch (ethcmd) {
3097         case ETHTOOL_FLASHDEV:
3098                 if (state->devlink)
3099                         rc = devlink_compat_flash_update(state->devlink,
3100                                                          state->efl.data);
3101                 break;
3102         case ETHTOOL_GDRVINFO:
3103                 if (state->devlink)
3104                         devlink_compat_running_version(state->devlink,
3105                                                        state->info.fw_version,
3106                                                        sizeof(state->info.fw_version));
3107                 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3108                         rc = -EFAULT;
3109                         goto exit_free;
3110                 }
3111                 break;
3112         }
3113
3114 exit_free:
3115         if (state->devlink)
3116                 devlink_put(state->devlink);
3117         kfree(state);
3118         return rc;
3119 }
3120
3121 struct ethtool_rx_flow_key {
3122         struct flow_dissector_key_basic                 basic;
3123         union {
3124                 struct flow_dissector_key_ipv4_addrs    ipv4;
3125                 struct flow_dissector_key_ipv6_addrs    ipv6;
3126         };
3127         struct flow_dissector_key_ports                 tp;
3128         struct flow_dissector_key_ip                    ip;
3129         struct flow_dissector_key_vlan                  vlan;
3130         struct flow_dissector_key_eth_addrs             eth_addrs;
3131 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3132
3133 struct ethtool_rx_flow_match {
3134         struct flow_dissector           dissector;
3135         struct ethtool_rx_flow_key      key;
3136         struct ethtool_rx_flow_key      mask;
3137 };
3138
3139 struct ethtool_rx_flow_rule *
3140 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3141 {
3142         const struct ethtool_rx_flow_spec *fs = input->fs;
3143         struct ethtool_rx_flow_match *match;
3144         struct ethtool_rx_flow_rule *flow;
3145         struct flow_action_entry *act;
3146
3147         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3148                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3149         if (!flow)
3150                 return ERR_PTR(-ENOMEM);
3151
3152         /* ethtool_rx supports only one single action per rule. */
3153         flow->rule = flow_rule_alloc(1);
3154         if (!flow->rule) {
3155                 kfree(flow);
3156                 return ERR_PTR(-ENOMEM);
3157         }
3158
3159         match = (struct ethtool_rx_flow_match *)flow->priv;
3160         flow->rule->match.dissector     = &match->dissector;
3161         flow->rule->match.mask          = &match->mask;
3162         flow->rule->match.key           = &match->key;
3163
3164         match->mask.basic.n_proto = htons(0xffff);
3165
3166         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3167         case ETHER_FLOW: {
3168                 const struct ethhdr *ether_spec, *ether_m_spec;
3169
3170                 ether_spec = &fs->h_u.ether_spec;
3171                 ether_m_spec = &fs->m_u.ether_spec;
3172
3173                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3174                         ether_addr_copy(match->key.eth_addrs.src,
3175                                         ether_spec->h_source);
3176                         ether_addr_copy(match->mask.eth_addrs.src,
3177                                         ether_m_spec->h_source);
3178                 }
3179                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3180                         ether_addr_copy(match->key.eth_addrs.dst,
3181                                         ether_spec->h_dest);
3182                         ether_addr_copy(match->mask.eth_addrs.dst,
3183                                         ether_m_spec->h_dest);
3184                 }
3185                 if (ether_m_spec->h_proto) {
3186                         match->key.basic.n_proto = ether_spec->h_proto;
3187                         match->mask.basic.n_proto = ether_m_spec->h_proto;
3188                 }
3189                 }
3190                 break;
3191         case TCP_V4_FLOW:
3192         case UDP_V4_FLOW: {
3193                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3194
3195                 match->key.basic.n_proto = htons(ETH_P_IP);
3196
3197                 v4_spec = &fs->h_u.tcp_ip4_spec;
3198                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3199
3200                 if (v4_m_spec->ip4src) {
3201                         match->key.ipv4.src = v4_spec->ip4src;
3202                         match->mask.ipv4.src = v4_m_spec->ip4src;
3203                 }
3204                 if (v4_m_spec->ip4dst) {
3205                         match->key.ipv4.dst = v4_spec->ip4dst;
3206                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
3207                 }
3208                 if (v4_m_spec->ip4src ||
3209                     v4_m_spec->ip4dst) {
3210                         match->dissector.used_keys |=
3211                                 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3212                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3213                                 offsetof(struct ethtool_rx_flow_key, ipv4);
3214                 }
3215                 if (v4_m_spec->psrc) {
3216                         match->key.tp.src = v4_spec->psrc;
3217                         match->mask.tp.src = v4_m_spec->psrc;
3218                 }
3219                 if (v4_m_spec->pdst) {
3220                         match->key.tp.dst = v4_spec->pdst;
3221                         match->mask.tp.dst = v4_m_spec->pdst;
3222                 }
3223                 if (v4_m_spec->psrc ||
3224                     v4_m_spec->pdst) {
3225                         match->dissector.used_keys |=
3226                                 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3227                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3228                                 offsetof(struct ethtool_rx_flow_key, tp);
3229                 }
3230                 if (v4_m_spec->tos) {
3231                         match->key.ip.tos = v4_spec->tos;
3232                         match->mask.ip.tos = v4_m_spec->tos;
3233                         match->dissector.used_keys |=
3234                                 BIT(FLOW_DISSECTOR_KEY_IP);
3235                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3236                                 offsetof(struct ethtool_rx_flow_key, ip);
3237                 }
3238                 }
3239                 break;
3240         case TCP_V6_FLOW:
3241         case UDP_V6_FLOW: {
3242                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3243
3244                 match->key.basic.n_proto = htons(ETH_P_IPV6);
3245
3246                 v6_spec = &fs->h_u.tcp_ip6_spec;
3247                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3248                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3249                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3250                                sizeof(match->key.ipv6.src));
3251                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3252                                sizeof(match->mask.ipv6.src));
3253                 }
3254                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3255                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3256                                sizeof(match->key.ipv6.dst));
3257                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3258                                sizeof(match->mask.ipv6.dst));
3259                 }
3260                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3261                     !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3262                         match->dissector.used_keys |=
3263                                 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3264                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3265                                 offsetof(struct ethtool_rx_flow_key, ipv6);
3266                 }
3267                 if (v6_m_spec->psrc) {
3268                         match->key.tp.src = v6_spec->psrc;
3269                         match->mask.tp.src = v6_m_spec->psrc;
3270                 }
3271                 if (v6_m_spec->pdst) {
3272                         match->key.tp.dst = v6_spec->pdst;
3273                         match->mask.tp.dst = v6_m_spec->pdst;
3274                 }
3275                 if (v6_m_spec->psrc ||
3276                     v6_m_spec->pdst) {
3277                         match->dissector.used_keys |=
3278                                 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3279                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3280                                 offsetof(struct ethtool_rx_flow_key, tp);
3281                 }
3282                 if (v6_m_spec->tclass) {
3283                         match->key.ip.tos = v6_spec->tclass;
3284                         match->mask.ip.tos = v6_m_spec->tclass;
3285                         match->dissector.used_keys |=
3286                                 BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3287                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3288                                 offsetof(struct ethtool_rx_flow_key, ip);
3289                 }
3290                 }
3291                 break;
3292         default:
3293                 ethtool_rx_flow_rule_destroy(flow);
3294                 return ERR_PTR(-EINVAL);
3295         }
3296
3297         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3298         case TCP_V4_FLOW:
3299         case TCP_V6_FLOW:
3300                 match->key.basic.ip_proto = IPPROTO_TCP;
3301                 match->mask.basic.ip_proto = 0xff;
3302                 break;
3303         case UDP_V4_FLOW:
3304         case UDP_V6_FLOW:
3305                 match->key.basic.ip_proto = IPPROTO_UDP;
3306                 match->mask.basic.ip_proto = 0xff;
3307                 break;
3308         }
3309
3310         match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3311         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3312                 offsetof(struct ethtool_rx_flow_key, basic);
3313
3314         if (fs->flow_type & FLOW_EXT) {
3315                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3316                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3317
3318                 if (ext_m_spec->vlan_etype) {
3319                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3320                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3321                 }
3322
3323                 if (ext_m_spec->vlan_tci) {
3324                         match->key.vlan.vlan_id =
3325                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3326                         match->mask.vlan.vlan_id =
3327                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3328
3329                         match->key.vlan.vlan_dei =
3330                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3331                         match->mask.vlan.vlan_dei =
3332                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3333
3334                         match->key.vlan.vlan_priority =
3335                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3336                         match->mask.vlan.vlan_priority =
3337                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3338                 }
3339
3340                 if (ext_m_spec->vlan_etype ||
3341                     ext_m_spec->vlan_tci) {
3342                         match->dissector.used_keys |=
3343                                 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3344                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3345                                 offsetof(struct ethtool_rx_flow_key, vlan);
3346                 }
3347         }
3348         if (fs->flow_type & FLOW_MAC_EXT) {
3349                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3350                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3351
3352                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3353                        ETH_ALEN);
3354                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3355                        ETH_ALEN);
3356
3357                 match->dissector.used_keys |=
3358                         BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3359                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3360                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3361         }
3362
3363         act = &flow->rule->action.entries[0];
3364         switch (fs->ring_cookie) {
3365         case RX_CLS_FLOW_DISC:
3366                 act->id = FLOW_ACTION_DROP;
3367                 break;
3368         case RX_CLS_FLOW_WAKE:
3369                 act->id = FLOW_ACTION_WAKE;
3370                 break;
3371         default:
3372                 act->id = FLOW_ACTION_QUEUE;
3373                 if (fs->flow_type & FLOW_RSS)
3374                         act->queue.ctx = input->rss_ctx;
3375
3376                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3377                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3378                 break;
3379         }
3380
3381         return flow;
3382 }
3383 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3384
3385 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3386 {
3387         kfree(flow->rule);
3388         kfree(flow);
3389 }
3390 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);