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         /* Synchronize carrier state with link watch, see also rtnl_getlink() */
  62         linkwatch_sync_dev(dev);
  63
  64         return netif_carrier_ok(dev) ? 1 : 0;
  65 }
  66 EXPORT_SYMBOL(ethtool_op_get_link);
  67
  68 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  69 {
  70         info->so_timestamping =
  71                 SOF_TIMESTAMPING_TX_SOFTWARE |
  72                 SOF_TIMESTAMPING_RX_SOFTWARE |
  73                 SOF_TIMESTAMPING_SOFTWARE;
  74         info->phc_index = -1;
  75         return 0;
  76 }
  77 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  78
  79 /* Handlers for each ethtool command */
  80
  81 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
  82 {
  83         struct ethtool_gfeatures cmd = {
  84                 .cmd = ETHTOOL_GFEATURES,
  85                 .size = ETHTOOL_DEV_FEATURE_WORDS,
  86         };
  87         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
  88         u32 __user *sizeaddr;
  89         u32 copy_size;
  90         int i;
  91
  92         /* in case feature bits run out again */
  93         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
  94
  95         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
  96                 features[i].available = (u32)(dev->hw_features >> (32 * i));
  97                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
  98                 features[i].active = (u32)(dev->features >> (32 * i));
  99                 features[i].never_changed =
 100                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 101         }
 102
 103         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 104         if (get_user(copy_size, sizeaddr))
 105                 return -EFAULT;
 106
 107         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 108                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 109
 110         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 111                 return -EFAULT;
 112         useraddr += sizeof(cmd);
 113         if (copy_to_user(useraddr, features,
 114                          array_size(copy_size, sizeof(*features))))
 115                 return -EFAULT;
 116
 117         return 0;
 118 }
 119
 120 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 121 {
 122         struct ethtool_sfeatures cmd;
 123         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 124         netdev_features_t wanted = 0, valid = 0;
 125         int i, ret = 0;
 126
 127         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 128                 return -EFAULT;
 129         useraddr += sizeof(cmd);
 130
 131         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 132                 return -EINVAL;
 133
 134         if (copy_from_user(features, useraddr, sizeof(features)))
 135                 return -EFAULT;
 136
 137         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 138                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 139                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 140         }
 141
 142         if (valid & ~NETIF_F_ETHTOOL_BITS)
 143                 return -EINVAL;
 144
 145         if (valid & ~dev->hw_features) {
 146                 valid &= dev->hw_features;
 147                 ret |= ETHTOOL_F_UNSUPPORTED;
 148         }
 149
 150         dev->wanted_features &= ~valid;
 151         dev->wanted_features |= wanted & valid;
 152         __netdev_update_features(dev);
 153
 154         if ((dev->wanted_features ^ dev->features) & valid)
 155                 ret |= ETHTOOL_F_WISH;
 156
 157         return ret;
 158 }
 159
 160 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 161 {
 162         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 163         const struct ethtool_ops *ops = dev->ethtool_ops;
 164
 165         if (sset == ETH_SS_FEATURES)
 166                 return ARRAY_SIZE(netdev_features_strings);
 167
 168         if (sset == ETH_SS_RSS_HASH_FUNCS)
 169                 return ARRAY_SIZE(rss_hash_func_strings);
 170
 171         if (sset == ETH_SS_TUNABLES)
 172                 return ARRAY_SIZE(tunable_strings);
 173
 174         if (sset == ETH_SS_PHY_TUNABLES)
 175                 return ARRAY_SIZE(phy_tunable_strings);
 176
 177         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 178             !ops->get_ethtool_phy_stats &&
 179             phy_ops && phy_ops->get_sset_count)
 180                 return phy_ops->get_sset_count(dev->phydev);
 181
 182         if (sset == ETH_SS_LINK_MODES)
 183                 return __ETHTOOL_LINK_MODE_MASK_NBITS;
 184
 185         if (ops->get_sset_count && ops->get_strings)
 186                 return ops->get_sset_count(dev, sset);
 187         else
 188                 return -EOPNOTSUPP;
 189 }
 190
 191 static void __ethtool_get_strings(struct net_device *dev,
 192         u32 stringset, u8 *data)
 193 {
 194         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
 195         const struct ethtool_ops *ops = dev->ethtool_ops;
 196
 197         if (stringset == ETH_SS_FEATURES)
 198                 memcpy(data, netdev_features_strings,
 199                         sizeof(netdev_features_strings));
 200         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 201                 memcpy(data, rss_hash_func_strings,
 202                        sizeof(rss_hash_func_strings));
 203         else if (stringset == ETH_SS_TUNABLES)
 204                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 205         else if (stringset == ETH_SS_PHY_TUNABLES)
 206                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 207         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 208                  !ops->get_ethtool_phy_stats && phy_ops &&
 209                  phy_ops->get_strings)
 210                 phy_ops->get_strings(dev->phydev, data);
 211         else if (stringset == ETH_SS_LINK_MODES)
 212                 memcpy(data, link_mode_names,
 213                        __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
 214         else
 215                 /* ops->get_strings is valid because checked earlier */
 216                 ops->get_strings(dev, stringset, data);
 217 }
 218
 219 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 220 {
 221         /* feature masks of legacy discrete ethtool ops */
 222
 223         switch (eth_cmd) {
 224         case ETHTOOL_GTXCSUM:
 225         case ETHTOOL_STXCSUM:
 226                 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
 227                        NETIF_F_SCTP_CRC;
 228         case ETHTOOL_GRXCSUM:
 229         case ETHTOOL_SRXCSUM:
 230                 return NETIF_F_RXCSUM;
 231         case ETHTOOL_GSG:
 232         case ETHTOOL_SSG:
 233                 return NETIF_F_SG | NETIF_F_FRAGLIST;
 234         case ETHTOOL_GTSO:
 235         case ETHTOOL_STSO:
 236                 return NETIF_F_ALL_TSO;
 237         case ETHTOOL_GGSO:
 238         case ETHTOOL_SGSO:
 239                 return NETIF_F_GSO;
 240         case ETHTOOL_GGRO:
 241         case ETHTOOL_SGRO:
 242                 return NETIF_F_GRO;
 243         default:
 244                 BUG();
 245         }
 246 }
 247
 248 static int ethtool_get_one_feature(struct net_device *dev,
 249         char __user *useraddr, u32 ethcmd)
 250 {
 251         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 252         struct ethtool_value edata = {
 253                 .cmd = ethcmd,
 254                 .data = !!(dev->features & mask),
 255         };
 256
 257         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 258                 return -EFAULT;
 259         return 0;
 260 }
 261
 262 static int ethtool_set_one_feature(struct net_device *dev,
 263         void __user *useraddr, u32 ethcmd)
 264 {
 265         struct ethtool_value edata;
 266         netdev_features_t mask;
 267
 268         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 269                 return -EFAULT;
 270
 271         mask = ethtool_get_feature_mask(ethcmd);
 272         mask &= dev->hw_features;
 273         if (!mask)
 274                 return -EOPNOTSUPP;
 275
 276         if (edata.data)
 277                 dev->wanted_features |= mask;
 278         else
 279                 dev->wanted_features &= ~mask;
 280
 281         __netdev_update_features(dev);
 282
 283         return 0;
 284 }
 285
 286 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 287                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 288 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 289                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 290                           NETIF_F_RXHASH)
 291
 292 static u32 __ethtool_get_flags(struct net_device *dev)
 293 {
 294         u32 flags = 0;
 295
 296         if (dev->features & NETIF_F_LRO)
 297                 flags |= ETH_FLAG_LRO;
 298         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 299                 flags |= ETH_FLAG_RXVLAN;
 300         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 301                 flags |= ETH_FLAG_TXVLAN;
 302         if (dev->features & NETIF_F_NTUPLE)
 303                 flags |= ETH_FLAG_NTUPLE;
 304         if (dev->features & NETIF_F_RXHASH)
 305                 flags |= ETH_FLAG_RXHASH;
 306
 307         return flags;
 308 }
 309
 310 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 311 {
 312         netdev_features_t features = 0, changed;
 313
 314         if (data & ~ETH_ALL_FLAGS)
 315                 return -EINVAL;
 316
 317         if (data & ETH_FLAG_LRO)
 318                 features |= NETIF_F_LRO;
 319         if (data & ETH_FLAG_RXVLAN)
 320                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 321         if (data & ETH_FLAG_TXVLAN)
 322                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 323         if (data & ETH_FLAG_NTUPLE)
 324                 features |= NETIF_F_NTUPLE;
 325         if (data & ETH_FLAG_RXHASH)
 326                 features |= NETIF_F_RXHASH;
 327
 328         /* allow changing only bits set in hw_features */
 329         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 330         if (changed & ~dev->hw_features)
 331                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 332
 333         dev->wanted_features =
 334                 (dev->wanted_features & ~changed) | (features & changed);
 335
 336         __netdev_update_features(dev);
 337
 338         return 0;
 339 }
 340
 341 /* Given two link masks, AND them together and save the result in dst. */
 342 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 343                                   struct ethtool_link_ksettings *src)
 344 {
 345         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 346         unsigned int idx = 0;
 347
 348         for (; idx < size; idx++) {
 349                 dst->link_modes.supported[idx] &=
 350                         src->link_modes.supported[idx];
 351                 dst->link_modes.advertising[idx] &=
 352                         src->link_modes.advertising[idx];
 353         }
 354 }
 355 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 356
 357 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 358                                              u32 legacy_u32)
 359 {
 360         linkmode_zero(dst);
 361         dst[0] = legacy_u32;
 362 }
 363 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 364
 365 /* return false if src had higher bits set. lower bits always updated. */
 366 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 367                                              const unsigned long *src)
 368 {
 369         *legacy_u32 = src[0];
 370         return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
 371                 __ETHTOOL_LINK_MODE_MASK_NBITS;
 372 }
 373 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 374
 375 /* return false if ksettings link modes had higher bits
 376  * set. legacy_settings always updated (best effort)
 377  */
 378 static bool
 379 convert_link_ksettings_to_legacy_settings(
 380         struct ethtool_cmd *legacy_settings,
 381         const struct ethtool_link_ksettings *link_ksettings)
 382 {
 383         bool retval = true;
 384
 385         memset(legacy_settings, 0, sizeof(*legacy_settings));
 386         /* this also clears the deprecated fields in legacy structure:
 387          * __u8         transceiver;
 388          * __u32        maxtxpkt;
 389          * __u32        maxrxpkt;
 390          */
 391
 392         retval &= ethtool_convert_link_mode_to_legacy_u32(
 393                 &legacy_settings->supported,
 394                 link_ksettings->link_modes.supported);
 395         retval &= ethtool_convert_link_mode_to_legacy_u32(
 396                 &legacy_settings->advertising,
 397                 link_ksettings->link_modes.advertising);
 398         retval &= ethtool_convert_link_mode_to_legacy_u32(
 399                 &legacy_settings->lp_advertising,
 400                 link_ksettings->link_modes.lp_advertising);
 401         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 402         legacy_settings->duplex
 403                 = link_ksettings->base.duplex;
 404         legacy_settings->port
 405                 = link_ksettings->base.port;
 406         legacy_settings->phy_address
 407                 = link_ksettings->base.phy_address;
 408         legacy_settings->autoneg
 409                 = link_ksettings->base.autoneg;
 410         legacy_settings->mdio_support
 411                 = link_ksettings->base.mdio_support;
 412         legacy_settings->eth_tp_mdix
 413                 = link_ksettings->base.eth_tp_mdix;
 414         legacy_settings->eth_tp_mdix_ctrl
 415                 = link_ksettings->base.eth_tp_mdix_ctrl;
 416         legacy_settings->transceiver
 417                 = link_ksettings->base.transceiver;
 418         return retval;
 419 }
 420
 421 /* number of 32-bit words to store the user's link mode bitmaps */
 422 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 423         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 424
 425 /* layout of the struct passed from/to userland */
 426 struct ethtool_link_usettings {
 427         struct ethtool_link_settings base;
 428         struct {
 429                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 430                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 431                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 432         } link_modes;
 433 };
 434
 435 /* Internal kernel helper to query a device ethtool_link_settings. */
 436 int __ethtool_get_link_ksettings(struct net_device *dev,
 437                                  struct ethtool_link_ksettings *link_ksettings)
 438 {
 439         ASSERT_RTNL();
 440
 441         if (!dev->ethtool_ops->get_link_ksettings)
 442                 return -EOPNOTSUPP;
 443
 444         memset(link_ksettings, 0, sizeof(*link_ksettings));
 445         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 446 }
 447 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 448
 449 /* convert ethtool_link_usettings in user space to a kernel internal
 450  * ethtool_link_ksettings. return 0 on success, errno on error.
 451  */
 452 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 453                                          const void __user *from)
 454 {
 455         struct ethtool_link_usettings link_usettings;
 456
 457         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 458                 return -EFAULT;
 459
 460         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 461         bitmap_from_arr32(to->link_modes.supported,
 462                           link_usettings.link_modes.supported,
 463                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 464         bitmap_from_arr32(to->link_modes.advertising,
 465                           link_usettings.link_modes.advertising,
 466                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 467         bitmap_from_arr32(to->link_modes.lp_advertising,
 468                           link_usettings.link_modes.lp_advertising,
 469                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 470
 471         return 0;
 472 }
 473
 474 /* Check if the user is trying to change anything besides speed/duplex */
 475 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
 476 {
 477         struct ethtool_link_settings base2 = {};
 478
 479         base2.speed = cmd->base.speed;
 480         base2.port = PORT_OTHER;
 481         base2.duplex = cmd->base.duplex;
 482         base2.cmd = cmd->base.cmd;
 483         base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
 484
 485         return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
 486                 bitmap_empty(cmd->link_modes.supported,
 487                              __ETHTOOL_LINK_MODE_MASK_NBITS) &&
 488                 bitmap_empty(cmd->link_modes.lp_advertising,
 489                              __ETHTOOL_LINK_MODE_MASK_NBITS);
 490 }
 491
 492 /* convert a kernel internal ethtool_link_ksettings to
 493  * ethtool_link_usettings in user space. return 0 on success, errno on
 494  * error.
 495  */
 496 static int
 497 store_link_ksettings_for_user(void __user *to,
 498                               const struct ethtool_link_ksettings *from)
 499 {
 500         struct ethtool_link_usettings link_usettings;
 501
 502         memcpy(&link_usettings, from, sizeof(link_usettings));
 503         bitmap_to_arr32(link_usettings.link_modes.supported,
 504                         from->link_modes.supported,
 505                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 506         bitmap_to_arr32(link_usettings.link_modes.advertising,
 507                         from->link_modes.advertising,
 508                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 509         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 510                         from->link_modes.lp_advertising,
 511                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 512
 513         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 514                 return -EFAULT;
 515
 516         return 0;
 517 }
 518
 519 /* Query device for its ethtool_link_settings. */
 520 static int ethtool_get_link_ksettings(struct net_device *dev,
 521                                       void __user *useraddr)
 522 {
 523         int err = 0;
 524         struct ethtool_link_ksettings link_ksettings;
 525
 526         ASSERT_RTNL();
 527         if (!dev->ethtool_ops->get_link_ksettings)
 528                 return -EOPNOTSUPP;
 529
 530         /* handle bitmap nbits handshake */
 531         if (copy_from_user(&link_ksettings.base, useraddr,
 532                            sizeof(link_ksettings.base)))
 533                 return -EFAULT;
 534
 535         if (__ETHTOOL_LINK_MODE_MASK_NU32
 536             != link_ksettings.base.link_mode_masks_nwords) {
 537                 /* wrong link mode nbits requested */
 538                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 539                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 540                 /* send back number of words required as negative val */
 541                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 542                                    "need too many bits for link modes!");
 543                 link_ksettings.base.link_mode_masks_nwords
 544                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 545
 546                 /* copy the base fields back to user, not the link
 547                  * mode bitmaps
 548                  */
 549                 if (copy_to_user(useraddr, &link_ksettings.base,
 550                                  sizeof(link_ksettings.base)))
 551                         return -EFAULT;
 552
 553                 return 0;
 554         }
 555
 556         /* handshake successful: user/kernel agree on
 557          * link_mode_masks_nwords
 558          */
 559
 560         memset(&link_ksettings, 0, sizeof(link_ksettings));
 561         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 562         if (err < 0)
 563                 return err;
 564
 565         /* make sure we tell the right values to user */
 566         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 567         link_ksettings.base.link_mode_masks_nwords
 568                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 569         link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
 570         link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
 571         link_ksettings.base.rate_matching = RATE_MATCH_NONE;
 572
 573         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 574 }
 575
 576 /* Update device ethtool_link_settings. */
 577 static int ethtool_set_link_ksettings(struct net_device *dev,
 578                                       void __user *useraddr)
 579 {
 580         struct ethtool_link_ksettings link_ksettings = {};
 581         int err;
 582
 583         ASSERT_RTNL();
 584
 585         if (!dev->ethtool_ops->set_link_ksettings)
 586                 return -EOPNOTSUPP;
 587
 588         /* make sure nbits field has expected value */
 589         if (copy_from_user(&link_ksettings.base, useraddr,
 590                            sizeof(link_ksettings.base)))
 591                 return -EFAULT;
 592
 593         if (__ETHTOOL_LINK_MODE_MASK_NU32
 594             != link_ksettings.base.link_mode_masks_nwords)
 595                 return -EINVAL;
 596
 597         /* copy the whole structure, now that we know it has expected
 598          * format
 599          */
 600         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 601         if (err)
 602                 return err;
 603
 604         /* re-check nwords field, just in case */
 605         if (__ETHTOOL_LINK_MODE_MASK_NU32
 606             != link_ksettings.base.link_mode_masks_nwords)
 607                 return -EINVAL;
 608
 609         if (link_ksettings.base.master_slave_cfg ||
 610             link_ksettings.base.master_slave_state)
 611                 return -EINVAL;
 612
 613         err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 614         if (err >= 0) {
 615                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 616                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 617         }
 618         return err;
 619 }
 620
 621 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
 622                                        const struct ethtool_link_ksettings *cmd,
 623                                        u32 *dev_speed, u8 *dev_duplex)
 624 {
 625         u32 speed;
 626         u8 duplex;
 627
 628         speed = cmd->base.speed;
 629         duplex = cmd->base.duplex;
 630         /* don't allow custom speed and duplex */
 631         if (!ethtool_validate_speed(speed) ||
 632             !ethtool_validate_duplex(duplex) ||
 633             !ethtool_virtdev_validate_cmd(cmd))
 634                 return -EINVAL;
 635         *dev_speed = speed;
 636         *dev_duplex = duplex;
 637
 638         return 0;
 639 }
 640 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
 641
 642 /* Query device for its ethtool_cmd settings.
 643  *
 644  * Backward compatibility note: for compatibility with legacy ethtool, this is
 645  * now implemented via get_link_ksettings. When driver reports higher link mode
 646  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 647  * recommend user to upgrade ethtool, but the command is successful (only the
 648  * lower link mode bits reported back to user). Deprecated fields from
 649  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 650  */
 651 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 652 {
 653         struct ethtool_link_ksettings link_ksettings;
 654         struct ethtool_cmd cmd;
 655         int err;
 656
 657         ASSERT_RTNL();
 658         if (!dev->ethtool_ops->get_link_ksettings)
 659                 return -EOPNOTSUPP;
 660
 661         memset(&link_ksettings, 0, sizeof(link_ksettings));
 662         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 663         if (err < 0)
 664                 return err;
 665         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 666
 667         /* send a sensible cmd tag back to user */
 668         cmd.cmd = ETHTOOL_GSET;
 669
 670         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 671                 return -EFAULT;
 672
 673         return 0;
 674 }
 675
 676 /* Update device link settings with given ethtool_cmd.
 677  *
 678  * Backward compatibility note: for compatibility with legacy ethtool, this is
 679  * now always implemented via set_link_settings. When user's request updates
 680  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 681  * warning is logged once (with name of 1st driver/device) to recommend user to
 682  * upgrade ethtool, and the request is rejected.
 683  */
 684 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 685 {
 686         struct ethtool_link_ksettings link_ksettings;
 687         struct ethtool_cmd cmd;
 688         int ret;
 689
 690         ASSERT_RTNL();
 691
 692         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 693                 return -EFAULT;
 694         if (!dev->ethtool_ops->set_link_ksettings)
 695                 return -EOPNOTSUPP;
 696
 697         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 698                 return -EINVAL;
 699         link_ksettings.base.link_mode_masks_nwords =
 700                 __ETHTOOL_LINK_MODE_MASK_NU32;
 701         ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 702         if (ret >= 0) {
 703                 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
 704                 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
 705         }
 706         return ret;
 707 }
 708
 709 static int
 710 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
 711 {
 712         const struct ethtool_ops *ops = dev->ethtool_ops;
 713         struct device *parent = dev->dev.parent;
 714
 715         rsp->info.cmd = ETHTOOL_GDRVINFO;
 716         strscpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version));
 717         if (ops->get_drvinfo) {
 718                 ops->get_drvinfo(dev, &rsp->info);
 719                 if (!rsp->info.bus_info[0] && parent)
 720                         strscpy(rsp->info.bus_info, dev_name(parent),
 721                                 sizeof(rsp->info.bus_info));
 722                 if (!rsp->info.driver[0] && parent && parent->driver)
 723                         strscpy(rsp->info.driver, parent->driver->name,
 724                                 sizeof(rsp->info.driver));
 725         } else if (parent && parent->driver) {
 726                 strscpy(rsp->info.bus_info, dev_name(parent),
 727                         sizeof(rsp->info.bus_info));
 728                 strscpy(rsp->info.driver, parent->driver->name,
 729                         sizeof(rsp->info.driver));
 730         } else if (dev->rtnl_link_ops) {
 731                 strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
 732                         sizeof(rsp->info.driver));
 733         } else {
 734                 return -EOPNOTSUPP;
 735         }
 736
 737         /*
 738          * this method of obtaining string set info is deprecated;
 739          * Use ETHTOOL_GSSET_INFO instead.
 740          */
 741         if (ops->get_sset_count) {
 742                 int rc;
 743
 744                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 745                 if (rc >= 0)
 746                         rsp->info.testinfo_len = rc;
 747                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 748                 if (rc >= 0)
 749                         rsp->info.n_stats = rc;
 750                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 751                 if (rc >= 0)
 752                         rsp->info.n_priv_flags = rc;
 753         }
 754         if (ops->get_regs_len) {
 755                 int ret = ops->get_regs_len(dev);
 756
 757                 if (ret > 0)
 758                         rsp->info.regdump_len = ret;
 759         }
 760
 761         if (ops->get_eeprom_len)
 762                 rsp->info.eedump_len = ops->get_eeprom_len(dev);
 763
 764         if (!rsp->info.fw_version[0])
 765                 rsp->devlink = netdev_to_devlink_get(dev);
 766
 767         return 0;
 768 }
 769
 770 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 771                                                     void __user *useraddr)
 772 {
 773         struct ethtool_sset_info info;
 774         u64 sset_mask;
 775         int i, idx = 0, n_bits = 0, ret, rc;
 776         u32 *info_buf = NULL;
 777
 778         if (copy_from_user(&info, useraddr, sizeof(info)))
 779                 return -EFAULT;
 780
 781         /* store copy of mask, because we zero struct later on */
 782         sset_mask = info.sset_mask;
 783         if (!sset_mask)
 784                 return 0;
 785
 786         /* calculate size of return buffer */
 787         n_bits = hweight64(sset_mask);
 788
 789         memset(&info, 0, sizeof(info));
 790         info.cmd = ETHTOOL_GSSET_INFO;
 791
 792         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 793         if (!info_buf)
 794                 return -ENOMEM;
 795
 796         /*
 797          * fill return buffer based on input bitmask and successful
 798          * get_sset_count return
 799          */
 800         for (i = 0; i < 64; i++) {
 801                 if (!(sset_mask & (1ULL << i)))
 802                         continue;
 803
 804                 rc = __ethtool_get_sset_count(dev, i);
 805                 if (rc >= 0) {
 806                         info.sset_mask |= (1ULL << i);
 807                         info_buf[idx++] = rc;
 808                 }
 809         }
 810
 811         ret = -EFAULT;
 812         if (copy_to_user(useraddr, &info, sizeof(info)))
 813                 goto out;
 814
 815         useraddr += offsetof(struct ethtool_sset_info, data);
 816         if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
 817                 goto out;
 818
 819         ret = 0;
 820
 821 out:
 822         kfree(info_buf);
 823         return ret;
 824 }
 825
 826 static noinline_for_stack int
 827 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
 828                                const struct compat_ethtool_rxnfc __user *useraddr,
 829                                size_t size)
 830 {
 831         struct compat_ethtool_rxnfc crxnfc = {};
 832
 833         /* We expect there to be holes between fs.m_ext and
 834          * fs.ring_cookie and at the end of fs, but nowhere else.
 835          * On non-x86, no conversion should be needed.
 836          */
 837         BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
 838                      sizeof(struct compat_ethtool_rxnfc) !=
 839                      sizeof(struct ethtool_rxnfc));
 840         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
 841                      sizeof(useraddr->fs.m_ext) !=
 842                      offsetof(struct ethtool_rxnfc, fs.m_ext) +
 843                      sizeof(rxnfc->fs.m_ext));
 844         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
 845                      offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
 846                      offsetof(struct ethtool_rxnfc, fs.location) -
 847                      offsetof(struct ethtool_rxnfc, fs.ring_cookie));
 848
 849         if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
 850                 return -EFAULT;
 851
 852         *rxnfc = (struct ethtool_rxnfc) {
 853                 .cmd            = crxnfc.cmd,
 854                 .flow_type      = crxnfc.flow_type,
 855                 .data           = crxnfc.data,
 856                 .fs             = {
 857                         .flow_type      = crxnfc.fs.flow_type,
 858                         .h_u            = crxnfc.fs.h_u,
 859                         .h_ext          = crxnfc.fs.h_ext,
 860                         .m_u            = crxnfc.fs.m_u,
 861                         .m_ext          = crxnfc.fs.m_ext,
 862                         .ring_cookie    = crxnfc.fs.ring_cookie,
 863                         .location       = crxnfc.fs.location,
 864                 },
 865                 .rule_cnt       = crxnfc.rule_cnt,
 866         };
 867
 868         return 0;
 869 }
 870
 871 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
 872                                         const void __user *useraddr,
 873                                         size_t size)
 874 {
 875         if (compat_need_64bit_alignment_fixup())
 876                 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
 877
 878         if (copy_from_user(rxnfc, useraddr, size))
 879                 return -EFAULT;
 880
 881         return 0;
 882 }
 883
 884 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
 885                                         const struct ethtool_rxnfc *rxnfc,
 886                                         size_t size, const u32 *rule_buf)
 887 {
 888         struct compat_ethtool_rxnfc crxnfc;
 889
 890         memset(&crxnfc, 0, sizeof(crxnfc));
 891         crxnfc = (struct compat_ethtool_rxnfc) {
 892                 .cmd            = rxnfc->cmd,
 893                 .flow_type      = rxnfc->flow_type,
 894                 .data           = rxnfc->data,
 895                 .fs             = {
 896                         .flow_type      = rxnfc->fs.flow_type,
 897                         .h_u            = rxnfc->fs.h_u,
 898                         .h_ext          = rxnfc->fs.h_ext,
 899                         .m_u            = rxnfc->fs.m_u,
 900                         .m_ext          = rxnfc->fs.m_ext,
 901                         .ring_cookie    = rxnfc->fs.ring_cookie,
 902                         .location       = rxnfc->fs.location,
 903                 },
 904                 .rule_cnt       = rxnfc->rule_cnt,
 905         };
 906
 907         if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
 908                 return -EFAULT;
 909
 910         return 0;
 911 }
 912
 913 static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
 914                                      size_t *info_size, void __user *useraddr)
 915 {
 916         /* struct ethtool_rxnfc was originally defined for
 917          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 918          * members.  User-space might still be using that
 919          * definition.
 920          */
 921         if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
 922                 *info_size = (offsetof(struct ethtool_rxnfc, data) +
 923                               sizeof(info->data));
 924
 925         if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 926                 return -EFAULT;
 927
 928         if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
 929                 *info_size = sizeof(*info);
 930                 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 931                         return -EFAULT;
 932                 /* Since malicious users may modify the original data,
 933                  * we need to check whether FLOW_RSS is still requested.
 934                  */
 935                 if (!(info->flow_type & FLOW_RSS))
 936                         return -EINVAL;
 937         }
 938
 939         if (info->cmd != cmd)
 940                 return -EINVAL;
 941
 942         return 0;
 943 }
 944
 945 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
 946                                       const struct ethtool_rxnfc *rxnfc,
 947                                       size_t size, const u32 *rule_buf)
 948 {
 949         int ret;
 950
 951         if (compat_need_64bit_alignment_fixup()) {
 952                 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
 953                                                    rule_buf);
 954                 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
 955         } else {
 956                 ret = copy_to_user(useraddr, rxnfc, size);
 957                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 958         }
 959
 960         if (ret)
 961                 return -EFAULT;
 962
 963         if (rule_buf) {
 964                 if (copy_to_user(useraddr, rule_buf,
 965                                  rxnfc->rule_cnt * sizeof(u32)))
 966                         return -EFAULT;
 967         }
 968
 969         return 0;
 970 }
 971
 972 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 973                                                 u32 cmd, void __user *useraddr)
 974 {
 975         const struct ethtool_ops *ops = dev->ethtool_ops;
 976         struct ethtool_rxnfc info;
 977         size_t info_size = sizeof(info);
 978         int rc;
 979
 980         if (!ops->set_rxnfc)
 981                 return -EOPNOTSUPP;
 982
 983         rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
 984         if (rc)
 985                 return rc;
 986
 987         if (ops->get_rxfh) {
 988                 struct ethtool_rxfh_param rxfh = {};
 989
 990                 rc = ops->get_rxfh(dev, &rxfh);
 991                 if (rc)
 992                         return rc;
 993
 994                 /* Sanity check: if symmetric-xor is set, then:
 995                  * 1 - no other fields besides IP src/dst and/or L4 src/dst
 996                  * 2 - If src is set, dst must also be set
 997                  */
 998                 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
 999                     ((info.data & ~(RXH_IP_SRC | RXH_IP_DST |
1000                                     RXH_L4_B_0_1 | RXH_L4_B_2_3)) ||
1001                      (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) ||
1002                      (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3))))
1003                         return -EINVAL;
1004         }
1005
1006         rc = ops->set_rxnfc(dev, &info);
1007         if (rc)
1008                 return rc;
1009
1010         if (cmd == ETHTOOL_SRXCLSRLINS &&
1011             ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
1012                 return -EFAULT;
1013
1014         return 0;
1015 }
1016
1017 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1018                                                 u32 cmd, void __user *useraddr)
1019 {
1020         struct ethtool_rxnfc info;
1021         size_t info_size = sizeof(info);
1022         const struct ethtool_ops *ops = dev->ethtool_ops;
1023         int ret;
1024         void *rule_buf = NULL;
1025
1026         if (!ops->get_rxnfc)
1027                 return -EOPNOTSUPP;
1028
1029         ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1030         if (ret)
1031                 return ret;
1032
1033         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1034                 if (info.rule_cnt > 0) {
1035                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1036                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1037                                                    GFP_USER);
1038                         if (!rule_buf)
1039                                 return -ENOMEM;
1040                 }
1041         }
1042
1043         ret = ops->get_rxnfc(dev, &info, rule_buf);
1044         if (ret < 0)
1045                 goto err_out;
1046
1047         ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1048 err_out:
1049         kfree(rule_buf);
1050
1051         return ret;
1052 }
1053
1054 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1055                                         struct ethtool_rxnfc *rx_rings,
1056                                         u32 size)
1057 {
1058         int i;
1059
1060         if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1061                 return -EFAULT;
1062
1063         /* Validate ring indices */
1064         for (i = 0; i < size; i++)
1065                 if (indir[i] >= rx_rings->data)
1066                         return -EINVAL;
1067
1068         return 0;
1069 }
1070
1071 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1072
1073 void netdev_rss_key_fill(void *buffer, size_t len)
1074 {
1075         BUG_ON(len > sizeof(netdev_rss_key));
1076         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1077         memcpy(buffer, netdev_rss_key, len);
1078 }
1079 EXPORT_SYMBOL(netdev_rss_key_fill);
1080
1081 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1082                                                      void __user *useraddr)
1083 {
1084         struct ethtool_rxfh_param rxfh = {};
1085         u32 user_size;
1086         int ret;
1087
1088         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1089             !dev->ethtool_ops->get_rxfh)
1090                 return -EOPNOTSUPP;
1091         rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1092         if (rxfh.indir_size == 0)
1093                 return -EOPNOTSUPP;
1094
1095         if (copy_from_user(&user_size,
1096                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1097                            sizeof(user_size)))
1098                 return -EFAULT;
1099
1100         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1101                          &rxfh.indir_size, sizeof(rxfh.indir_size)))
1102                 return -EFAULT;
1103
1104         /* If the user buffer size is 0, this is just a query for the
1105          * device table size.  Otherwise, if it's smaller than the
1106          * device table size it's an error.
1107          */
1108         if (user_size < rxfh.indir_size)
1109                 return user_size == 0 ? 0 : -EINVAL;
1110
1111         rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
1112         if (!rxfh.indir)
1113                 return -ENOMEM;
1114
1115         ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
1116         if (ret)
1117                 goto out;
1118         if (copy_to_user(useraddr +
1119                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1120                          rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
1121                 ret = -EFAULT;
1122
1123 out:
1124         kfree(rxfh.indir);
1125         return ret;
1126 }
1127
1128 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1129                                                      void __user *useraddr)
1130 {
1131         const struct ethtool_ops *ops = dev->ethtool_ops;
1132         struct ethtool_rxfh_param rxfh_dev = {};
1133         struct netlink_ext_ack *extack = NULL;
1134         struct ethtool_rxnfc rx_rings;
1135         u32 user_size, i;
1136         int ret;
1137         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1138
1139         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1140             !ops->get_rxnfc)
1141                 return -EOPNOTSUPP;
1142
1143         rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1144         if (rxfh_dev.indir_size == 0)
1145                 return -EOPNOTSUPP;
1146
1147         if (copy_from_user(&user_size,
1148                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1149                            sizeof(user_size)))
1150                 return -EFAULT;
1151
1152         if (user_size != 0 && user_size != rxfh_dev.indir_size)
1153                 return -EINVAL;
1154
1155         rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
1156                                  sizeof(rxfh_dev.indir[0]), GFP_USER);
1157         if (!rxfh_dev.indir)
1158                 return -ENOMEM;
1159
1160         rx_rings.cmd = ETHTOOL_GRXRINGS;
1161         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1162         if (ret)
1163                 goto out;
1164
1165         if (user_size == 0) {
1166                 u32 *indir = rxfh_dev.indir;
1167
1168                 for (i = 0; i < rxfh_dev.indir_size; i++)
1169                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1170         } else {
1171                 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1172                                                   useraddr + ringidx_offset,
1173                                                   &rx_rings,
1174                                                   rxfh_dev.indir_size);
1175                 if (ret)
1176                         goto out;
1177         }
1178
1179         rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;
1180         ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1181         if (ret)
1182                 goto out;
1183
1184         /* indicate whether rxfh was set to default */
1185         if (user_size == 0)
1186                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1187         else
1188                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1189
1190 out:
1191         kfree(rxfh_dev.indir);
1192         return ret;
1193 }
1194
1195 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1196                                                void __user *useraddr)
1197 {
1198         const struct ethtool_ops *ops = dev->ethtool_ops;
1199         struct ethtool_rxfh_param rxfh_dev = {};
1200         u32 user_indir_size, user_key_size;
1201         struct ethtool_rxfh rxfh;
1202         u32 indir_bytes;
1203         u8 *rss_config;
1204         u32 total_size;
1205         int ret;
1206
1207         if (!ops->get_rxfh)
1208                 return -EOPNOTSUPP;
1209
1210         if (ops->get_rxfh_indir_size)
1211                 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1212         if (ops->get_rxfh_key_size)
1213                 rxfh_dev.key_size = ops->get_rxfh_key_size(dev);
1214
1215         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1216                 return -EFAULT;
1217         user_indir_size = rxfh.indir_size;
1218         user_key_size = rxfh.key_size;
1219
1220         /* Check that reserved fields are 0 for now */
1221         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1222                 return -EINVAL;
1223         /* Most drivers don't handle rss_context, check it's 0 as well */
1224         if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1225                 return -EOPNOTSUPP;
1226
1227         rxfh.indir_size = rxfh_dev.indir_size;
1228         rxfh.key_size = rxfh_dev.key_size;
1229         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1230                 return -EFAULT;
1231
1232         if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
1233             (user_key_size && user_key_size != rxfh_dev.key_size))
1234                 return -EINVAL;
1235
1236         indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
1237         total_size = indir_bytes + user_key_size;
1238         rss_config = kzalloc(total_size, GFP_USER);
1239         if (!rss_config)
1240                 return -ENOMEM;
1241
1242         if (user_indir_size)
1243                 rxfh_dev.indir = (u32 *)rss_config;
1244
1245         if (user_key_size)
1246                 rxfh_dev.key = rss_config + indir_bytes;
1247
1248         rxfh_dev.rss_context = rxfh.rss_context;
1249
1250         ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
1251         if (ret)
1252                 goto out;
1253
1254         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1255                          &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
1256                 ret = -EFAULT;
1257         } else if (copy_to_user(useraddr +
1258                                 offsetof(struct ethtool_rxfh, input_xfrm),
1259                                 &rxfh_dev.input_xfrm,
1260                                 sizeof(rxfh.input_xfrm))) {
1261                 ret = -EFAULT;
1262         } else if (copy_to_user(useraddr +
1263                               offsetof(struct ethtool_rxfh, rss_config[0]),
1264                               rss_config, total_size)) {
1265                 ret = -EFAULT;
1266         }
1267 out:
1268         kfree(rss_config);
1269
1270         return ret;
1271 }
1272
1273 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1274                                                void __user *useraddr)
1275 {
1276         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1277         const struct ethtool_ops *ops = dev->ethtool_ops;
1278         u32 dev_indir_size = 0, dev_key_size = 0, i;
1279         struct ethtool_rxfh_param rxfh_dev = {};
1280         struct netlink_ext_ack *extack = NULL;
1281         struct ethtool_rxnfc rx_rings;
1282         struct ethtool_rxfh rxfh;
1283         u32 indir_bytes = 0;
1284         u8 *rss_config;
1285         int ret;
1286
1287         if (!ops->get_rxnfc || !ops->set_rxfh)
1288                 return -EOPNOTSUPP;
1289
1290         if (ops->get_rxfh_indir_size)
1291                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1292         if (ops->get_rxfh_key_size)
1293                 dev_key_size = ops->get_rxfh_key_size(dev);
1294
1295         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1296                 return -EFAULT;
1297
1298         /* Check that reserved fields are 0 for now */
1299         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1300                 return -EINVAL;
1301         /* Most drivers don't handle rss_context, check it's 0 as well */
1302         if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1303                 return -EOPNOTSUPP;
1304         /* Check input data transformation capabilities */
1305         if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
1306             rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
1307                 return -EINVAL;
1308         if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1309             !ops->cap_rss_sym_xor_supported)
1310                 return -EOPNOTSUPP;
1311
1312         /* If either indir, hash key or function is valid, proceed further.
1313          * Must request at least one change: indir size, hash key, function
1314          * or input transformation.
1315          */
1316         if ((rxfh.indir_size &&
1317              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1318              rxfh.indir_size != dev_indir_size) ||
1319             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1320             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1321              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
1322              rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
1323                 return -EINVAL;
1324
1325         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1326                 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);
1327
1328         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1329         if (!rss_config)
1330                 return -ENOMEM;
1331
1332         rx_rings.cmd = ETHTOOL_GRXRINGS;
1333         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1334         if (ret)
1335                 goto out;
1336
1337         /* rxfh.indir_size == 0 means reset the indir table to default (master
1338          * context) or delete the context (other RSS contexts).
1339          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1340          */
1341         if (rxfh.indir_size &&
1342             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1343                 rxfh_dev.indir = (u32 *)rss_config;
1344                 rxfh_dev.indir_size = dev_indir_size;
1345                 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1346                                                   useraddr + rss_cfg_offset,
1347                                                   &rx_rings,
1348                                                   rxfh.indir_size);
1349                 if (ret)
1350                         goto out;
1351         } else if (rxfh.indir_size == 0) {
1352                 if (rxfh.rss_context == 0) {
1353                         u32 *indir;
1354
1355                         rxfh_dev.indir = (u32 *)rss_config;
1356                         rxfh_dev.indir_size = dev_indir_size;
1357                         indir = rxfh_dev.indir;
1358                         for (i = 0; i < dev_indir_size; i++)
1359                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1360                 } else {
1361                         rxfh_dev.rss_delete = true;
1362                 }
1363         }
1364
1365         if (rxfh.key_size) {
1366                 rxfh_dev.key_size = dev_key_size;
1367                 rxfh_dev.key = rss_config + indir_bytes;
1368                 if (copy_from_user(rxfh_dev.key,
1369                                    useraddr + rss_cfg_offset + indir_bytes,
1370                                    rxfh.key_size)) {
1371                         ret = -EFAULT;
1372                         goto out;
1373                 }
1374         }
1375
1376         rxfh_dev.hfunc = rxfh.hfunc;
1377         rxfh_dev.rss_context = rxfh.rss_context;
1378         rxfh_dev.input_xfrm = rxfh.input_xfrm;
1379
1380         ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1381         if (ret)
1382                 goto out;
1383
1384         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1385                          &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
1386                 ret = -EFAULT;
1387
1388         if (!rxfh_dev.rss_context) {
1389                 /* indicate whether rxfh was set to default */
1390                 if (rxfh.indir_size == 0)
1391                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1392                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1393                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1394         }
1395
1396 out:
1397         kfree(rss_config);
1398         return ret;
1399 }
1400
1401 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1402 {
1403         struct ethtool_regs regs;
1404         const struct ethtool_ops *ops = dev->ethtool_ops;
1405         void *regbuf;
1406         int reglen, ret;
1407
1408         if (!ops->get_regs || !ops->get_regs_len)
1409                 return -EOPNOTSUPP;
1410
1411         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1412                 return -EFAULT;
1413
1414         reglen = ops->get_regs_len(dev);
1415         if (reglen <= 0)
1416                 return reglen;
1417
1418         if (regs.len > reglen)
1419                 regs.len = reglen;
1420
1421         regbuf = vzalloc(reglen);
1422         if (!regbuf)
1423                 return -ENOMEM;
1424
1425         if (regs.len < reglen)
1426                 reglen = regs.len;
1427
1428         ops->get_regs(dev, &regs, regbuf);
1429
1430         ret = -EFAULT;
1431         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1432                 goto out;
1433         useraddr += offsetof(struct ethtool_regs, data);
1434         if (copy_to_user(useraddr, regbuf, reglen))
1435                 goto out;
1436         ret = 0;
1437
1438  out:
1439         vfree(regbuf);
1440         return ret;
1441 }
1442
1443 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1444 {
1445         struct ethtool_value reset;
1446         int ret;
1447
1448         if (!dev->ethtool_ops->reset)
1449                 return -EOPNOTSUPP;
1450
1451         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1452                 return -EFAULT;
1453
1454         ret = dev->ethtool_ops->reset(dev, &reset.data);
1455         if (ret)
1456                 return ret;
1457
1458         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1459                 return -EFAULT;
1460         return 0;
1461 }
1462
1463 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1464 {
1465         struct ethtool_wolinfo wol;
1466
1467         if (!dev->ethtool_ops->get_wol)
1468                 return -EOPNOTSUPP;
1469
1470         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1471         wol.cmd = ETHTOOL_GWOL;
1472         dev->ethtool_ops->get_wol(dev, &wol);
1473
1474         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1475                 return -EFAULT;
1476         return 0;
1477 }
1478
1479 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1480 {
1481         struct ethtool_wolinfo wol, cur_wol;
1482         int ret;
1483
1484         if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1485                 return -EOPNOTSUPP;
1486
1487         memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1488         cur_wol.cmd = ETHTOOL_GWOL;
1489         dev->ethtool_ops->get_wol(dev, &cur_wol);
1490
1491         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1492                 return -EFAULT;
1493
1494         if (wol.wolopts & ~cur_wol.supported)
1495                 return -EINVAL;
1496
1497         if (wol.wolopts == cur_wol.wolopts &&
1498             !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1499                 return 0;
1500
1501         ret = dev->ethtool_ops->set_wol(dev, &wol);
1502         if (ret)
1503                 return ret;
1504
1505         dev->wol_enabled = !!wol.wolopts;
1506         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1507
1508         return 0;
1509 }
1510
1511 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1512 {
1513         struct ethtool_eee edata;
1514         int rc;
1515
1516         if (!dev->ethtool_ops->get_eee)
1517                 return -EOPNOTSUPP;
1518
1519         memset(&edata, 0, sizeof(struct ethtool_eee));
1520         edata.cmd = ETHTOOL_GEEE;
1521         rc = dev->ethtool_ops->get_eee(dev, &edata);
1522
1523         if (rc)
1524                 return rc;
1525
1526         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1527                 return -EFAULT;
1528
1529         return 0;
1530 }
1531
1532 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1533 {
1534         struct ethtool_eee edata;
1535         int ret;
1536
1537         if (!dev->ethtool_ops->set_eee)
1538                 return -EOPNOTSUPP;
1539
1540         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1541                 return -EFAULT;
1542
1543         ret = dev->ethtool_ops->set_eee(dev, &edata);
1544         if (!ret)
1545                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1546         return ret;
1547 }
1548
1549 static int ethtool_nway_reset(struct net_device *dev)
1550 {
1551         if (!dev->ethtool_ops->nway_reset)
1552                 return -EOPNOTSUPP;
1553
1554         return dev->ethtool_ops->nway_reset(dev);
1555 }
1556
1557 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1558 {
1559         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1560         int link = __ethtool_get_link(dev);
1561
1562         if (link < 0)
1563                 return link;
1564
1565         edata.data = link;
1566         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1567                 return -EFAULT;
1568         return 0;
1569 }
1570
1571 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1572                                   int (*getter)(struct net_device *,
1573                                                 struct ethtool_eeprom *, u8 *),
1574                                   u32 total_len)
1575 {
1576         struct ethtool_eeprom eeprom;
1577         void __user *userbuf = useraddr + sizeof(eeprom);
1578         u32 bytes_remaining;
1579         u8 *data;
1580         int ret = 0;
1581
1582         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1583                 return -EFAULT;
1584
1585         /* Check for wrap and zero */
1586         if (eeprom.offset + eeprom.len <= eeprom.offset)
1587                 return -EINVAL;
1588
1589         /* Check for exceeding total eeprom len */
1590         if (eeprom.offset + eeprom.len > total_len)
1591                 return -EINVAL;
1592
1593         data = kzalloc(PAGE_SIZE, GFP_USER);
1594         if (!data)
1595                 return -ENOMEM;
1596
1597         bytes_remaining = eeprom.len;
1598         while (bytes_remaining > 0) {
1599                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1600
1601                 ret = getter(dev, &eeprom, data);
1602                 if (ret)
1603                         break;
1604                 if (!eeprom.len) {
1605                         ret = -EIO;
1606                         break;
1607                 }
1608                 if (copy_to_user(userbuf, data, eeprom.len)) {
1609                         ret = -EFAULT;
1610                         break;
1611                 }
1612                 userbuf += eeprom.len;
1613                 eeprom.offset += eeprom.len;
1614                 bytes_remaining -= eeprom.len;
1615         }
1616
1617         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1618         eeprom.offset -= eeprom.len;
1619         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1620                 ret = -EFAULT;
1621
1622         kfree(data);
1623         return ret;
1624 }
1625
1626 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1627 {
1628         const struct ethtool_ops *ops = dev->ethtool_ops;
1629
1630         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1631             !ops->get_eeprom_len(dev))
1632                 return -EOPNOTSUPP;
1633
1634         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1635                                       ops->get_eeprom_len(dev));
1636 }
1637
1638 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1639 {
1640         struct ethtool_eeprom eeprom;
1641         const struct ethtool_ops *ops = dev->ethtool_ops;
1642         void __user *userbuf = useraddr + sizeof(eeprom);
1643         u32 bytes_remaining;
1644         u8 *data;
1645         int ret = 0;
1646
1647         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1648             !ops->get_eeprom_len(dev))
1649                 return -EOPNOTSUPP;
1650
1651         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1652                 return -EFAULT;
1653
1654         /* Check for wrap and zero */
1655         if (eeprom.offset + eeprom.len <= eeprom.offset)
1656                 return -EINVAL;
1657
1658         /* Check for exceeding total eeprom len */
1659         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1660                 return -EINVAL;
1661
1662         data = kzalloc(PAGE_SIZE, GFP_USER);
1663         if (!data)
1664                 return -ENOMEM;
1665
1666         bytes_remaining = eeprom.len;
1667         while (bytes_remaining > 0) {
1668                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1669
1670                 if (copy_from_user(data, userbuf, eeprom.len)) {
1671                         ret = -EFAULT;
1672                         break;
1673                 }
1674                 ret = ops->set_eeprom(dev, &eeprom, data);
1675                 if (ret)
1676                         break;
1677                 userbuf += eeprom.len;
1678                 eeprom.offset += eeprom.len;
1679                 bytes_remaining -= eeprom.len;
1680         }
1681
1682         kfree(data);
1683         return ret;
1684 }
1685
1686 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1687                                                    void __user *useraddr)
1688 {
1689         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1690         struct kernel_ethtool_coalesce kernel_coalesce = {};
1691         int ret;
1692
1693         if (!dev->ethtool_ops->get_coalesce)
1694                 return -EOPNOTSUPP;
1695
1696         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1697                                              NULL);
1698         if (ret)
1699                 return ret;
1700
1701         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1702                 return -EFAULT;
1703         return 0;
1704 }
1705
1706 static bool
1707 ethtool_set_coalesce_supported(struct net_device *dev,
1708                                struct ethtool_coalesce *coalesce)
1709 {
1710         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1711         u32 nonzero_params = 0;
1712
1713         if (coalesce->rx_coalesce_usecs)
1714                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1715         if (coalesce->rx_max_coalesced_frames)
1716                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1717         if (coalesce->rx_coalesce_usecs_irq)
1718                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1719         if (coalesce->rx_max_coalesced_frames_irq)
1720                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1721         if (coalesce->tx_coalesce_usecs)
1722                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1723         if (coalesce->tx_max_coalesced_frames)
1724                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1725         if (coalesce->tx_coalesce_usecs_irq)
1726                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1727         if (coalesce->tx_max_coalesced_frames_irq)
1728                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1729         if (coalesce->stats_block_coalesce_usecs)
1730                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1731         if (coalesce->use_adaptive_rx_coalesce)
1732                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1733         if (coalesce->use_adaptive_tx_coalesce)
1734                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1735         if (coalesce->pkt_rate_low)
1736                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1737         if (coalesce->rx_coalesce_usecs_low)
1738                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1739         if (coalesce->rx_max_coalesced_frames_low)
1740                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1741         if (coalesce->tx_coalesce_usecs_low)
1742                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1743         if (coalesce->tx_max_coalesced_frames_low)
1744                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1745         if (coalesce->pkt_rate_high)
1746                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1747         if (coalesce->rx_coalesce_usecs_high)
1748                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1749         if (coalesce->rx_max_coalesced_frames_high)
1750                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1751         if (coalesce->tx_coalesce_usecs_high)
1752                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1753         if (coalesce->tx_max_coalesced_frames_high)
1754                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1755         if (coalesce->rate_sample_interval)
1756                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1757
1758         return (supported_params & nonzero_params) == nonzero_params;
1759 }
1760
1761 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1762                                                    void __user *useraddr)
1763 {
1764         struct kernel_ethtool_coalesce kernel_coalesce = {};
1765         struct ethtool_coalesce coalesce;
1766         int ret;
1767
1768         if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
1769                 return -EOPNOTSUPP;
1770
1771         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1772                                              NULL);
1773         if (ret)
1774                 return ret;
1775
1776         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1777                 return -EFAULT;
1778
1779         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1780                 return -EOPNOTSUPP;
1781
1782         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1783                                              NULL);
1784         if (!ret)
1785                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1786         return ret;
1787 }
1788
1789 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1790 {
1791         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1792         struct kernel_ethtool_ringparam kernel_ringparam = {};
1793
1794         if (!dev->ethtool_ops->get_ringparam)
1795                 return -EOPNOTSUPP;
1796
1797         dev->ethtool_ops->get_ringparam(dev, &ringparam,
1798                                         &kernel_ringparam, NULL);
1799
1800         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1801                 return -EFAULT;
1802         return 0;
1803 }
1804
1805 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1806 {
1807         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1808         struct kernel_ethtool_ringparam kernel_ringparam;
1809         int ret;
1810
1811         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1812                 return -EOPNOTSUPP;
1813
1814         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1815                 return -EFAULT;
1816
1817         dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
1818
1819         /* ensure new ring parameters are within the maximums */
1820         if (ringparam.rx_pending > max.rx_max_pending ||
1821             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1822             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1823             ringparam.tx_pending > max.tx_max_pending)
1824                 return -EINVAL;
1825
1826         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
1827                                               &kernel_ringparam, NULL);
1828         if (!ret)
1829                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1830         return ret;
1831 }
1832
1833 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1834                                                    void __user *useraddr)
1835 {
1836         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1837
1838         if (!dev->ethtool_ops->get_channels)
1839                 return -EOPNOTSUPP;
1840
1841         dev->ethtool_ops->get_channels(dev, &channels);
1842
1843         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1844                 return -EFAULT;
1845         return 0;
1846 }
1847
1848 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1849                                                    void __user *useraddr)
1850 {
1851         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1852         u16 from_channel, to_channel;
1853         u64 max_rxnfc_in_use;
1854         u32 max_rxfh_in_use;
1855         unsigned int i;
1856         int ret;
1857
1858         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1859                 return -EOPNOTSUPP;
1860
1861         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1862                 return -EFAULT;
1863
1864         dev->ethtool_ops->get_channels(dev, &curr);
1865
1866         if (channels.rx_count == curr.rx_count &&
1867             channels.tx_count == curr.tx_count &&
1868             channels.combined_count == curr.combined_count &&
1869             channels.other_count == curr.other_count)
1870                 return 0;
1871
1872         /* ensure new counts are within the maximums */
1873         if (channels.rx_count > curr.max_rx ||
1874             channels.tx_count > curr.max_tx ||
1875             channels.combined_count > curr.max_combined ||
1876             channels.other_count > curr.max_other)
1877                 return -EINVAL;
1878
1879         /* ensure there is at least one RX and one TX channel */
1880         if (!channels.combined_count &&
1881             (!channels.rx_count || !channels.tx_count))
1882                 return -EINVAL;
1883
1884         /* ensure the new Rx count fits within the configured Rx flow
1885          * indirection table/rxnfc settings */
1886         if (ethtool_get_max_rxnfc_channel(dev, &max_rxnfc_in_use))
1887                 max_rxnfc_in_use = 0;
1888         if (!netif_is_rxfh_configured(dev) ||
1889             ethtool_get_max_rxfh_channel(dev, &max_rxfh_in_use))
1890                 max_rxfh_in_use = 0;
1891         if (channels.combined_count + channels.rx_count <=
1892             max_t(u64, max_rxnfc_in_use, max_rxfh_in_use))
1893                 return -EINVAL;
1894
1895         /* Disabling channels, query zero-copy AF_XDP sockets */
1896         from_channel = channels.combined_count +
1897                 min(channels.rx_count, channels.tx_count);
1898         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1899         for (i = from_channel; i < to_channel; i++)
1900                 if (xsk_get_pool_from_qid(dev, i))
1901                         return -EINVAL;
1902
1903         ret = dev->ethtool_ops->set_channels(dev, &channels);
1904         if (!ret)
1905                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1906         return ret;
1907 }
1908
1909 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1910 {
1911         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1912
1913         if (!dev->ethtool_ops->get_pauseparam)
1914                 return -EOPNOTSUPP;
1915
1916         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1917
1918         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1919                 return -EFAULT;
1920         return 0;
1921 }
1922
1923 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1924 {
1925         struct ethtool_pauseparam pauseparam;
1926         int ret;
1927
1928         if (!dev->ethtool_ops->set_pauseparam)
1929                 return -EOPNOTSUPP;
1930
1931         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1932                 return -EFAULT;
1933
1934         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1935         if (!ret)
1936                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1937         return ret;
1938 }
1939
1940 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1941 {
1942         struct ethtool_test test;
1943         const struct ethtool_ops *ops = dev->ethtool_ops;
1944         u64 *data;
1945         int ret, test_len;
1946
1947         if (!ops->self_test || !ops->get_sset_count)
1948                 return -EOPNOTSUPP;
1949
1950         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1951         if (test_len < 0)
1952                 return test_len;
1953         WARN_ON(test_len == 0);
1954
1955         if (copy_from_user(&test, useraddr, sizeof(test)))
1956                 return -EFAULT;
1957
1958         test.len = test_len;
1959         data = kcalloc(test_len, sizeof(u64), GFP_USER);
1960         if (!data)
1961                 return -ENOMEM;
1962
1963         netif_testing_on(dev);
1964         ops->self_test(dev, &test, data);
1965         netif_testing_off(dev);
1966
1967         ret = -EFAULT;
1968         if (copy_to_user(useraddr, &test, sizeof(test)))
1969                 goto out;
1970         useraddr += sizeof(test);
1971         if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
1972                 goto out;
1973         ret = 0;
1974
1975  out:
1976         kfree(data);
1977         return ret;
1978 }
1979
1980 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1981 {
1982         struct ethtool_gstrings gstrings;
1983         u8 *data;
1984         int ret;
1985
1986         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1987                 return -EFAULT;
1988
1989         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1990         if (ret < 0)
1991                 return ret;
1992         if (ret > S32_MAX / ETH_GSTRING_LEN)
1993                 return -ENOMEM;
1994         WARN_ON_ONCE(!ret);
1995
1996         gstrings.len = ret;
1997
1998         if (gstrings.len) {
1999                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
2000                 if (!data)
2001                         return -ENOMEM;
2002
2003                 __ethtool_get_strings(dev, gstrings.string_set, data);
2004         } else {
2005                 data = NULL;
2006         }
2007
2008         ret = -EFAULT;
2009         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
2010                 goto out;
2011         useraddr += sizeof(gstrings);
2012         if (gstrings.len &&
2013             copy_to_user(useraddr, data,
2014                          array_size(gstrings.len, ETH_GSTRING_LEN)))
2015                 goto out;
2016         ret = 0;
2017
2018 out:
2019         vfree(data);
2020         return ret;
2021 }
2022
2023 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
2024 {
2025         va_list args;
2026
2027         va_start(args, fmt);
2028         vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
2029         va_end(args);
2030
2031         *data += ETH_GSTRING_LEN;
2032 }
2033 EXPORT_SYMBOL(ethtool_sprintf);
2034
2035 void ethtool_puts(u8 **data, const char *str)
2036 {
2037         strscpy(*data, str, ETH_GSTRING_LEN);
2038         *data += ETH_GSTRING_LEN;
2039 }
2040 EXPORT_SYMBOL(ethtool_puts);
2041
2042 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
2043 {
2044         struct ethtool_value id;
2045         static bool busy;
2046         const struct ethtool_ops *ops = dev->ethtool_ops;
2047         netdevice_tracker dev_tracker;
2048         int rc;
2049
2050         if (!ops->set_phys_id)
2051                 return -EOPNOTSUPP;
2052
2053         if (busy)
2054                 return -EBUSY;
2055
2056         if (copy_from_user(&id, useraddr, sizeof(id)))
2057                 return -EFAULT;
2058
2059         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2060         if (rc < 0)
2061                 return rc;
2062
2063         /* Drop the RTNL lock while waiting, but prevent reentry or
2064          * removal of the device.
2065          */
2066         busy = true;
2067         netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2068         rtnl_unlock();
2069
2070         if (rc == 0) {
2071                 /* Driver will handle this itself */
2072                 schedule_timeout_interruptible(
2073                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2074         } else {
2075                 /* Driver expects to be called at twice the frequency in rc */
2076                 int n = rc * 2, interval = HZ / n;
2077                 u64 count = mul_u32_u32(n, id.data);
2078                 u64 i = 0;
2079
2080                 do {
2081                         rtnl_lock();
2082                         rc = ops->set_phys_id(dev,
2083                                     (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2084                         rtnl_unlock();
2085                         if (rc)
2086                                 break;
2087                         schedule_timeout_interruptible(interval);
2088                 } while (!signal_pending(current) && (!id.data || i < count));
2089         }
2090
2091         rtnl_lock();
2092         netdev_put(dev, &dev_tracker);
2093         busy = false;
2094
2095         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2096         return rc;
2097 }
2098
2099 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2100 {
2101         struct ethtool_stats stats;
2102         const struct ethtool_ops *ops = dev->ethtool_ops;
2103         u64 *data;
2104         int ret, n_stats;
2105
2106         if (!ops->get_ethtool_stats || !ops->get_sset_count)
2107                 return -EOPNOTSUPP;
2108
2109         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2110         if (n_stats < 0)
2111                 return n_stats;
2112         if (n_stats > S32_MAX / sizeof(u64))
2113                 return -ENOMEM;
2114         WARN_ON_ONCE(!n_stats);
2115         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2116                 return -EFAULT;
2117
2118         stats.n_stats = n_stats;
2119
2120         if (n_stats) {
2121                 data = vzalloc(array_size(n_stats, sizeof(u64)));
2122                 if (!data)
2123                         return -ENOMEM;
2124                 ops->get_ethtool_stats(dev, &stats, data);
2125         } else {
2126                 data = NULL;
2127         }
2128
2129         ret = -EFAULT;
2130         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2131                 goto out;
2132         useraddr += sizeof(stats);
2133         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2134                 goto out;
2135         ret = 0;
2136
2137  out:
2138         vfree(data);
2139         return ret;
2140 }
2141
2142 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2143 {
2144         if (n_stats < 0)
2145                 return n_stats;
2146         if (n_stats > S32_MAX / sizeof(u64))
2147                 return -ENOMEM;
2148         if (WARN_ON_ONCE(!n_stats))
2149                 return -EOPNOTSUPP;
2150
2151         *data = vzalloc(array_size(n_stats, sizeof(u64)));
2152         if (!*data)
2153                 return -ENOMEM;
2154
2155         return 0;
2156 }
2157
2158 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2159                                          struct ethtool_stats *stats,
2160                                          u64 **data)
2161  {
2162         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2163         int n_stats, ret;
2164
2165         if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2166                 return -EOPNOTSUPP;
2167
2168         n_stats = phy_ops->get_sset_count(phydev);
2169
2170         ret = ethtool_vzalloc_stats_array(n_stats, data);
2171         if (ret)
2172                 return ret;
2173
2174         stats->n_stats = n_stats;
2175         return phy_ops->get_stats(phydev, stats, *data);
2176 }
2177
2178 static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2179                                           struct ethtool_stats *stats,
2180                                           u64 **data)
2181 {
2182         const struct ethtool_ops *ops = dev->ethtool_ops;
2183         int n_stats, ret;
2184
2185         if (!ops || !ops->get_sset_count || ops->get_ethtool_phy_stats)
2186                 return -EOPNOTSUPP;
2187
2188         n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2189
2190         ret = ethtool_vzalloc_stats_array(n_stats, data);
2191         if (ret)
2192                 return ret;
2193
2194         stats->n_stats = n_stats;
2195         ops->get_ethtool_phy_stats(dev, stats, *data);
2196
2197         return 0;
2198 }
2199
2200 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2201 {
2202         struct phy_device *phydev = dev->phydev;
2203         struct ethtool_stats stats;
2204         u64 *data = NULL;
2205         int ret = -EOPNOTSUPP;
2206
2207         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2208                 return -EFAULT;
2209
2210         if (phydev)
2211                 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2212
2213         if (ret == -EOPNOTSUPP)
2214                 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2215
2216         if (ret)
2217                 goto out;
2218
2219         if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2220                 ret = -EFAULT;
2221                 goto out;
2222         }
2223
2224         useraddr += sizeof(stats);
2225         if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2226                 ret = -EFAULT;
2227
2228  out:
2229         vfree(data);
2230         return ret;
2231 }
2232
2233 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2234 {
2235         struct ethtool_perm_addr epaddr;
2236
2237         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2238                 return -EFAULT;
2239
2240         if (epaddr.size < dev->addr_len)
2241                 return -ETOOSMALL;
2242         epaddr.size = dev->addr_len;
2243
2244         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2245                 return -EFAULT;
2246         useraddr += sizeof(epaddr);
2247         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2248                 return -EFAULT;
2249         return 0;
2250 }
2251
2252 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2253                              u32 cmd, u32 (*actor)(struct net_device *))
2254 {
2255         struct ethtool_value edata = { .cmd = cmd };
2256
2257         if (!actor)
2258                 return -EOPNOTSUPP;
2259
2260         edata.data = actor(dev);
2261
2262         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2263                 return -EFAULT;
2264         return 0;
2265 }
2266
2267 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2268                              void (*actor)(struct net_device *, u32))
2269 {
2270         struct ethtool_value edata;
2271
2272         if (!actor)
2273                 return -EOPNOTSUPP;
2274
2275         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2276                 return -EFAULT;
2277
2278         actor(dev, edata.data);
2279         return 0;
2280 }
2281
2282 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2283                              int (*actor)(struct net_device *, u32))
2284 {
2285         struct ethtool_value edata;
2286
2287         if (!actor)
2288                 return -EOPNOTSUPP;
2289
2290         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2291                 return -EFAULT;
2292
2293         return actor(dev, edata.data);
2294 }
2295
2296 static int
2297 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2298 {
2299         if (!dev->ethtool_ops->flash_device) {
2300                 req->devlink = netdev_to_devlink_get(dev);
2301                 return 0;
2302         }
2303
2304         return dev->ethtool_ops->flash_device(dev, &req->efl);
2305 }
2306
2307 static int ethtool_set_dump(struct net_device *dev,
2308                         void __user *useraddr)
2309 {
2310         struct ethtool_dump dump;
2311
2312         if (!dev->ethtool_ops->set_dump)
2313                 return -EOPNOTSUPP;
2314
2315         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2316                 return -EFAULT;
2317
2318         return dev->ethtool_ops->set_dump(dev, &dump);
2319 }
2320
2321 static int ethtool_get_dump_flag(struct net_device *dev,
2322                                 void __user *useraddr)
2323 {
2324         int ret;
2325         struct ethtool_dump dump;
2326         const struct ethtool_ops *ops = dev->ethtool_ops;
2327
2328         if (!ops->get_dump_flag)
2329                 return -EOPNOTSUPP;
2330
2331         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2332                 return -EFAULT;
2333
2334         ret = ops->get_dump_flag(dev, &dump);
2335         if (ret)
2336                 return ret;
2337
2338         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2339                 return -EFAULT;
2340         return 0;
2341 }
2342
2343 static int ethtool_get_dump_data(struct net_device *dev,
2344                                 void __user *useraddr)
2345 {
2346         int ret;
2347         __u32 len;
2348         struct ethtool_dump dump, tmp;
2349         const struct ethtool_ops *ops = dev->ethtool_ops;
2350         void *data = NULL;
2351
2352         if (!ops->get_dump_data || !ops->get_dump_flag)
2353                 return -EOPNOTSUPP;
2354
2355         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2356                 return -EFAULT;
2357
2358         memset(&tmp, 0, sizeof(tmp));
2359         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2360         ret = ops->get_dump_flag(dev, &tmp);
2361         if (ret)
2362                 return ret;
2363
2364         len = min(tmp.len, dump.len);
2365         if (!len)
2366                 return -EFAULT;
2367
2368         /* Don't ever let the driver think there's more space available
2369          * than it requested with .get_dump_flag().
2370          */
2371         dump.len = len;
2372
2373         /* Always allocate enough space to hold the whole thing so that the
2374          * driver does not need to check the length and bother with partial
2375          * dumping.
2376          */
2377         data = vzalloc(tmp.len);
2378         if (!data)
2379                 return -ENOMEM;
2380         ret = ops->get_dump_data(dev, &dump, data);
2381         if (ret)
2382                 goto out;
2383
2384         /* There are two sane possibilities:
2385          * 1. The driver's .get_dump_data() does not touch dump.len.
2386          * 2. Or it may set dump.len to how much it really writes, which
2387          *    should be tmp.len (or len if it can do a partial dump).
2388          * In any case respond to userspace with the actual length of data
2389          * it's receiving.
2390          */
2391         WARN_ON(dump.len != len && dump.len != tmp.len);
2392         dump.len = len;
2393
2394         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2395                 ret = -EFAULT;
2396                 goto out;
2397         }
2398         useraddr += offsetof(struct ethtool_dump, data);
2399         if (copy_to_user(useraddr, data, len))
2400                 ret = -EFAULT;
2401 out:
2402         vfree(data);
2403         return ret;
2404 }
2405
2406 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2407 {
2408         struct ethtool_ts_info info;
2409         int err;
2410
2411         err = __ethtool_get_ts_info(dev, &info);
2412         if (err)
2413                 return err;
2414
2415         if (copy_to_user(useraddr, &info, sizeof(info)))
2416                 return -EFAULT;
2417
2418         return 0;
2419 }
2420
2421 int ethtool_get_module_info_call(struct net_device *dev,
2422                                  struct ethtool_modinfo *modinfo)
2423 {
2424         const struct ethtool_ops *ops = dev->ethtool_ops;
2425         struct phy_device *phydev = dev->phydev;
2426
2427         if (dev->sfp_bus)
2428                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2429
2430         if (phydev && phydev->drv && phydev->drv->module_info)
2431                 return phydev->drv->module_info(phydev, modinfo);
2432
2433         if (ops->get_module_info)
2434                 return ops->get_module_info(dev, modinfo);
2435
2436         return -EOPNOTSUPP;
2437 }
2438
2439 static int ethtool_get_module_info(struct net_device *dev,
2440                                    void __user *useraddr)
2441 {
2442         int ret;
2443         struct ethtool_modinfo modinfo;
2444
2445         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2446                 return -EFAULT;
2447
2448         ret = ethtool_get_module_info_call(dev, &modinfo);
2449         if (ret)
2450                 return ret;
2451
2452         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2453                 return -EFAULT;
2454
2455         return 0;
2456 }
2457
2458 int ethtool_get_module_eeprom_call(struct net_device *dev,
2459                                    struct ethtool_eeprom *ee, u8 *data)
2460 {
2461         const struct ethtool_ops *ops = dev->ethtool_ops;
2462         struct phy_device *phydev = dev->phydev;
2463
2464         if (dev->sfp_bus)
2465                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2466
2467         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2468                 return phydev->drv->module_eeprom(phydev, ee, data);
2469
2470         if (ops->get_module_eeprom)
2471                 return ops->get_module_eeprom(dev, ee, data);
2472
2473         return -EOPNOTSUPP;
2474 }
2475
2476 static int ethtool_get_module_eeprom(struct net_device *dev,
2477                                      void __user *useraddr)
2478 {
2479         int ret;
2480         struct ethtool_modinfo modinfo;
2481
2482         ret = ethtool_get_module_info_call(dev, &modinfo);
2483         if (ret)
2484                 return ret;
2485
2486         return ethtool_get_any_eeprom(dev, useraddr,
2487                                       ethtool_get_module_eeprom_call,
2488                                       modinfo.eeprom_len);
2489 }
2490
2491 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2492 {
2493         switch (tuna->id) {
2494         case ETHTOOL_RX_COPYBREAK:
2495         case ETHTOOL_TX_COPYBREAK:
2496         case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2497                 if (tuna->len != sizeof(u32) ||
2498                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2499                         return -EINVAL;
2500                 break;
2501         case ETHTOOL_PFC_PREVENTION_TOUT:
2502                 if (tuna->len != sizeof(u16) ||
2503                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2504                         return -EINVAL;
2505                 break;
2506         default:
2507                 return -EINVAL;
2508         }
2509
2510         return 0;
2511 }
2512
2513 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2514 {
2515         int ret;
2516         struct ethtool_tunable tuna;
2517         const struct ethtool_ops *ops = dev->ethtool_ops;
2518         void *data;
2519
2520         if (!ops->get_tunable)
2521                 return -EOPNOTSUPP;
2522         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2523                 return -EFAULT;
2524         ret = ethtool_tunable_valid(&tuna);
2525         if (ret)
2526                 return ret;
2527         data = kzalloc(tuna.len, GFP_USER);
2528         if (!data)
2529                 return -ENOMEM;
2530         ret = ops->get_tunable(dev, &tuna, data);
2531         if (ret)
2532                 goto out;
2533         useraddr += sizeof(tuna);
2534         ret = -EFAULT;
2535         if (copy_to_user(useraddr, data, tuna.len))
2536                 goto out;
2537         ret = 0;
2538
2539 out:
2540         kfree(data);
2541         return ret;
2542 }
2543
2544 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2545 {
2546         int ret;
2547         struct ethtool_tunable tuna;
2548         const struct ethtool_ops *ops = dev->ethtool_ops;
2549         void *data;
2550
2551         if (!ops->set_tunable)
2552                 return -EOPNOTSUPP;
2553         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2554                 return -EFAULT;
2555         ret = ethtool_tunable_valid(&tuna);
2556         if (ret)
2557                 return ret;
2558         useraddr += sizeof(tuna);
2559         data = memdup_user(useraddr, tuna.len);
2560         if (IS_ERR(data))
2561                 return PTR_ERR(data);
2562         ret = ops->set_tunable(dev, &tuna, data);
2563
2564         kfree(data);
2565         return ret;
2566 }
2567
2568 static noinline_for_stack int
2569 ethtool_get_per_queue_coalesce(struct net_device *dev,
2570                                void __user *useraddr,
2571                                struct ethtool_per_queue_op *per_queue_opt)
2572 {
2573         u32 bit;
2574         int ret;
2575         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2576
2577         if (!dev->ethtool_ops->get_per_queue_coalesce)
2578                 return -EOPNOTSUPP;
2579
2580         useraddr += sizeof(*per_queue_opt);
2581
2582         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2583                           MAX_NUM_QUEUE);
2584
2585         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2586                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2587
2588                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2589                 if (ret != 0)
2590                         return ret;
2591                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2592                         return -EFAULT;
2593                 useraddr += sizeof(coalesce);
2594         }
2595
2596         return 0;
2597 }
2598
2599 static noinline_for_stack int
2600 ethtool_set_per_queue_coalesce(struct net_device *dev,
2601                                void __user *useraddr,
2602                                struct ethtool_per_queue_op *per_queue_opt)
2603 {
2604         u32 bit;
2605         int i, ret = 0;
2606         int n_queue;
2607         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2608         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2609
2610         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2611             (!dev->ethtool_ops->get_per_queue_coalesce))
2612                 return -EOPNOTSUPP;
2613
2614         useraddr += sizeof(*per_queue_opt);
2615
2616         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2617         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2618         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2619         if (!backup)
2620                 return -ENOMEM;
2621
2622         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2623                 struct ethtool_coalesce coalesce;
2624
2625                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2626                 if (ret != 0)
2627                         goto roll_back;
2628
2629                 tmp++;
2630
2631                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2632                         ret = -EFAULT;
2633                         goto roll_back;
2634                 }
2635
2636                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2637                         ret = -EOPNOTSUPP;
2638                         goto roll_back;
2639                 }
2640
2641                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2642                 if (ret != 0)
2643                         goto roll_back;
2644
2645                 useraddr += sizeof(coalesce);
2646         }
2647
2648 roll_back:
2649         if (ret != 0) {
2650                 tmp = backup;
2651                 for_each_set_bit(i, queue_mask, bit) {
2652                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2653                         tmp++;
2654                 }
2655         }
2656         kfree(backup);
2657
2658         return ret;
2659 }
2660
2661 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2662                                  void __user *useraddr, u32 sub_cmd)
2663 {
2664         struct ethtool_per_queue_op per_queue_opt;
2665
2666         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2667                 return -EFAULT;
2668
2669         if (per_queue_opt.sub_command != sub_cmd)
2670                 return -EINVAL;
2671
2672         switch (per_queue_opt.sub_command) {
2673         case ETHTOOL_GCOALESCE:
2674                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2675         case ETHTOOL_SCOALESCE:
2676                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2677         default:
2678                 return -EOPNOTSUPP;
2679         }
2680 }
2681
2682 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2683 {
2684         switch (tuna->id) {
2685         case ETHTOOL_PHY_DOWNSHIFT:
2686         case ETHTOOL_PHY_FAST_LINK_DOWN:
2687                 if (tuna->len != sizeof(u8) ||
2688                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2689                         return -EINVAL;
2690                 break;
2691         case ETHTOOL_PHY_EDPD:
2692                 if (tuna->len != sizeof(u16) ||
2693                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2694                         return -EINVAL;
2695                 break;
2696         default:
2697                 return -EINVAL;
2698         }
2699
2700         return 0;
2701 }
2702
2703 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2704 {
2705         struct phy_device *phydev = dev->phydev;
2706         struct ethtool_tunable tuna;
2707         bool phy_drv_tunable;
2708         void *data;
2709         int ret;
2710
2711         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2712         if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2713                 return -EOPNOTSUPP;
2714         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2715                 return -EFAULT;
2716         ret = ethtool_phy_tunable_valid(&tuna);
2717         if (ret)
2718                 return ret;
2719         data = kzalloc(tuna.len, GFP_USER);
2720         if (!data)
2721                 return -ENOMEM;
2722         if (phy_drv_tunable) {
2723                 mutex_lock(&phydev->lock);
2724                 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2725                 mutex_unlock(&phydev->lock);
2726         } else {
2727                 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2728         }
2729         if (ret)
2730                 goto out;
2731         useraddr += sizeof(tuna);
2732         ret = -EFAULT;
2733         if (copy_to_user(useraddr, data, tuna.len))
2734                 goto out;
2735         ret = 0;
2736
2737 out:
2738         kfree(data);
2739         return ret;
2740 }
2741
2742 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2743 {
2744         struct phy_device *phydev = dev->phydev;
2745         struct ethtool_tunable tuna;
2746         bool phy_drv_tunable;
2747         void *data;
2748         int ret;
2749
2750         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2751         if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2752                 return -EOPNOTSUPP;
2753         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2754                 return -EFAULT;
2755         ret = ethtool_phy_tunable_valid(&tuna);
2756         if (ret)
2757                 return ret;
2758         useraddr += sizeof(tuna);
2759         data = memdup_user(useraddr, tuna.len);
2760         if (IS_ERR(data))
2761                 return PTR_ERR(data);
2762         if (phy_drv_tunable) {
2763                 mutex_lock(&phydev->lock);
2764                 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2765                 mutex_unlock(&phydev->lock);
2766         } else {
2767                 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2768         }
2769
2770         kfree(data);
2771         return ret;
2772 }
2773
2774 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2775 {
2776         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2777         int rc;
2778
2779         if (!dev->ethtool_ops->get_fecparam)
2780                 return -EOPNOTSUPP;
2781
2782         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2783         if (rc)
2784                 return rc;
2785
2786         if (WARN_ON_ONCE(fecparam.reserved))
2787                 fecparam.reserved = 0;
2788
2789         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2790                 return -EFAULT;
2791         return 0;
2792 }
2793
2794 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2795 {
2796         struct ethtool_fecparam fecparam;
2797
2798         if (!dev->ethtool_ops->set_fecparam)
2799                 return -EOPNOTSUPP;
2800
2801         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2802                 return -EFAULT;
2803
2804         if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2805                 return -EINVAL;
2806
2807         fecparam.active_fec = 0;
2808         fecparam.reserved = 0;
2809
2810         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2811 }
2812
2813 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2814
2815 static int
2816 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2817               u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2818 {
2819         struct net_device *dev;
2820         u32 sub_cmd;
2821         int rc;
2822         netdev_features_t old_features;
2823
2824         dev = __dev_get_by_name(net, ifr->ifr_name);
2825         if (!dev)
2826                 return -ENODEV;
2827
2828         if (ethcmd == ETHTOOL_PERQUEUE) {
2829                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2830                         return -EFAULT;
2831         } else {
2832                 sub_cmd = ethcmd;
2833         }
2834         /* Allow some commands to be done by anyone */
2835         switch (sub_cmd) {
2836         case ETHTOOL_GSET:
2837         case ETHTOOL_GDRVINFO:
2838         case ETHTOOL_GMSGLVL:
2839         case ETHTOOL_GLINK:
2840         case ETHTOOL_GCOALESCE:
2841         case ETHTOOL_GRINGPARAM:
2842         case ETHTOOL_GPAUSEPARAM:
2843         case ETHTOOL_GRXCSUM:
2844         case ETHTOOL_GTXCSUM:
2845         case ETHTOOL_GSG:
2846         case ETHTOOL_GSSET_INFO:
2847         case ETHTOOL_GSTRINGS:
2848         case ETHTOOL_GSTATS:
2849         case ETHTOOL_GPHYSTATS:
2850         case ETHTOOL_GTSO:
2851         case ETHTOOL_GPERMADDR:
2852         case ETHTOOL_GUFO:
2853         case ETHTOOL_GGSO:
2854         case ETHTOOL_GGRO:
2855         case ETHTOOL_GFLAGS:
2856         case ETHTOOL_GPFLAGS:
2857         case ETHTOOL_GRXFH:
2858         case ETHTOOL_GRXRINGS:
2859         case ETHTOOL_GRXCLSRLCNT:
2860         case ETHTOOL_GRXCLSRULE:
2861         case ETHTOOL_GRXCLSRLALL:
2862         case ETHTOOL_GRXFHINDIR:
2863         case ETHTOOL_GRSSH:
2864         case ETHTOOL_GFEATURES:
2865         case ETHTOOL_GCHANNELS:
2866         case ETHTOOL_GET_TS_INFO:
2867         case ETHTOOL_GEEE:
2868         case ETHTOOL_GTUNABLE:
2869         case ETHTOOL_PHY_GTUNABLE:
2870         case ETHTOOL_GLINKSETTINGS:
2871         case ETHTOOL_GFECPARAM:
2872                 break;
2873         default:
2874                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2875                         return -EPERM;
2876         }
2877
2878         if (dev->dev.parent)
2879                 pm_runtime_get_sync(dev->dev.parent);
2880
2881         if (!netif_device_present(dev)) {
2882                 rc = -ENODEV;
2883                 goto out;
2884         }
2885
2886         if (dev->ethtool_ops->begin) {
2887                 rc = dev->ethtool_ops->begin(dev);
2888                 if (rc < 0)
2889                         goto out;
2890         }
2891         old_features = dev->features;
2892
2893         switch (ethcmd) {
2894         case ETHTOOL_GSET:
2895                 rc = ethtool_get_settings(dev, useraddr);
2896                 break;
2897         case ETHTOOL_SSET:
2898                 rc = ethtool_set_settings(dev, useraddr);
2899                 break;
2900         case ETHTOOL_GDRVINFO:
2901                 rc = ethtool_get_drvinfo(dev, devlink_state);
2902                 break;
2903         case ETHTOOL_GREGS:
2904                 rc = ethtool_get_regs(dev, useraddr);
2905                 break;
2906         case ETHTOOL_GWOL:
2907                 rc = ethtool_get_wol(dev, useraddr);
2908                 break;
2909         case ETHTOOL_SWOL:
2910                 rc = ethtool_set_wol(dev, useraddr);
2911                 break;
2912         case ETHTOOL_GMSGLVL:
2913                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2914                                        dev->ethtool_ops->get_msglevel);
2915                 break;
2916         case ETHTOOL_SMSGLVL:
2917                 rc = ethtool_set_value_void(dev, useraddr,
2918                                        dev->ethtool_ops->set_msglevel);
2919                 if (!rc)
2920                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2921                 break;
2922         case ETHTOOL_GEEE:
2923                 rc = ethtool_get_eee(dev, useraddr);
2924                 break;
2925         case ETHTOOL_SEEE:
2926                 rc = ethtool_set_eee(dev, useraddr);
2927                 break;
2928         case ETHTOOL_NWAY_RST:
2929                 rc = ethtool_nway_reset(dev);
2930                 break;
2931         case ETHTOOL_GLINK:
2932                 rc = ethtool_get_link(dev, useraddr);
2933                 break;
2934         case ETHTOOL_GEEPROM:
2935                 rc = ethtool_get_eeprom(dev, useraddr);
2936                 break;
2937         case ETHTOOL_SEEPROM:
2938                 rc = ethtool_set_eeprom(dev, useraddr);
2939                 break;
2940         case ETHTOOL_GCOALESCE:
2941                 rc = ethtool_get_coalesce(dev, useraddr);
2942                 break;
2943         case ETHTOOL_SCOALESCE:
2944                 rc = ethtool_set_coalesce(dev, useraddr);
2945                 break;
2946         case ETHTOOL_GRINGPARAM:
2947                 rc = ethtool_get_ringparam(dev, useraddr);
2948                 break;
2949         case ETHTOOL_SRINGPARAM:
2950                 rc = ethtool_set_ringparam(dev, useraddr);
2951                 break;
2952         case ETHTOOL_GPAUSEPARAM:
2953                 rc = ethtool_get_pauseparam(dev, useraddr);
2954                 break;
2955         case ETHTOOL_SPAUSEPARAM:
2956                 rc = ethtool_set_pauseparam(dev, useraddr);
2957                 break;
2958         case ETHTOOL_TEST:
2959                 rc = ethtool_self_test(dev, useraddr);
2960                 break;
2961         case ETHTOOL_GSTRINGS:
2962                 rc = ethtool_get_strings(dev, useraddr);
2963                 break;
2964         case ETHTOOL_PHYS_ID:
2965                 rc = ethtool_phys_id(dev, useraddr);
2966                 break;
2967         case ETHTOOL_GSTATS:
2968                 rc = ethtool_get_stats(dev, useraddr);
2969                 break;
2970         case ETHTOOL_GPERMADDR:
2971                 rc = ethtool_get_perm_addr(dev, useraddr);
2972                 break;
2973         case ETHTOOL_GFLAGS:
2974                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2975                                         __ethtool_get_flags);
2976                 break;
2977         case ETHTOOL_SFLAGS:
2978                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2979                 break;
2980         case ETHTOOL_GPFLAGS:
2981                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2982                                        dev->ethtool_ops->get_priv_flags);
2983                 if (!rc)
2984                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2985                 break;
2986         case ETHTOOL_SPFLAGS:
2987                 rc = ethtool_set_value(dev, useraddr,
2988                                        dev->ethtool_ops->set_priv_flags);
2989                 break;
2990         case ETHTOOL_GRXFH:
2991         case ETHTOOL_GRXRINGS:
2992         case ETHTOOL_GRXCLSRLCNT:
2993         case ETHTOOL_GRXCLSRULE:
2994         case ETHTOOL_GRXCLSRLALL:
2995                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2996                 break;
2997         case ETHTOOL_SRXFH:
2998         case ETHTOOL_SRXCLSRLDEL:
2999         case ETHTOOL_SRXCLSRLINS:
3000                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
3001                 break;
3002         case ETHTOOL_FLASHDEV:
3003                 rc = ethtool_flash_device(dev, devlink_state);
3004                 break;
3005         case ETHTOOL_RESET:
3006                 rc = ethtool_reset(dev, useraddr);
3007                 break;
3008         case ETHTOOL_GSSET_INFO:
3009                 rc = ethtool_get_sset_info(dev, useraddr);
3010                 break;
3011         case ETHTOOL_GRXFHINDIR:
3012                 rc = ethtool_get_rxfh_indir(dev, useraddr);
3013                 break;
3014         case ETHTOOL_SRXFHINDIR:
3015                 rc = ethtool_set_rxfh_indir(dev, useraddr);
3016                 break;
3017         case ETHTOOL_GRSSH:
3018                 rc = ethtool_get_rxfh(dev, useraddr);
3019                 break;
3020         case ETHTOOL_SRSSH:
3021                 rc = ethtool_set_rxfh(dev, useraddr);
3022                 break;
3023         case ETHTOOL_GFEATURES:
3024                 rc = ethtool_get_features(dev, useraddr);
3025                 break;
3026         case ETHTOOL_SFEATURES:
3027                 rc = ethtool_set_features(dev, useraddr);
3028                 break;
3029         case ETHTOOL_GTXCSUM:
3030         case ETHTOOL_GRXCSUM:
3031         case ETHTOOL_GSG:
3032         case ETHTOOL_GTSO:
3033         case ETHTOOL_GGSO:
3034         case ETHTOOL_GGRO:
3035                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
3036                 break;
3037         case ETHTOOL_STXCSUM:
3038         case ETHTOOL_SRXCSUM:
3039         case ETHTOOL_SSG:
3040         case ETHTOOL_STSO:
3041         case ETHTOOL_SGSO:
3042         case ETHTOOL_SGRO:
3043                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
3044                 break;
3045         case ETHTOOL_GCHANNELS:
3046                 rc = ethtool_get_channels(dev, useraddr);
3047                 break;
3048         case ETHTOOL_SCHANNELS:
3049                 rc = ethtool_set_channels(dev, useraddr);
3050                 break;
3051         case ETHTOOL_SET_DUMP:
3052                 rc = ethtool_set_dump(dev, useraddr);
3053                 break;
3054         case ETHTOOL_GET_DUMP_FLAG:
3055                 rc = ethtool_get_dump_flag(dev, useraddr);
3056                 break;
3057         case ETHTOOL_GET_DUMP_DATA:
3058                 rc = ethtool_get_dump_data(dev, useraddr);
3059                 break;
3060         case ETHTOOL_GET_TS_INFO:
3061                 rc = ethtool_get_ts_info(dev, useraddr);
3062                 break;
3063         case ETHTOOL_GMODULEINFO:
3064                 rc = ethtool_get_module_info(dev, useraddr);
3065                 break;
3066         case ETHTOOL_GMODULEEEPROM:
3067                 rc = ethtool_get_module_eeprom(dev, useraddr);
3068                 break;
3069         case ETHTOOL_GTUNABLE:
3070                 rc = ethtool_get_tunable(dev, useraddr);
3071                 break;
3072         case ETHTOOL_STUNABLE:
3073                 rc = ethtool_set_tunable(dev, useraddr);
3074                 break;
3075         case ETHTOOL_GPHYSTATS:
3076                 rc = ethtool_get_phy_stats(dev, useraddr);
3077                 break;
3078         case ETHTOOL_PERQUEUE:
3079                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3080                 break;
3081         case ETHTOOL_GLINKSETTINGS:
3082                 rc = ethtool_get_link_ksettings(dev, useraddr);
3083                 break;
3084         case ETHTOOL_SLINKSETTINGS:
3085                 rc = ethtool_set_link_ksettings(dev, useraddr);
3086                 break;
3087         case ETHTOOL_PHY_GTUNABLE:
3088                 rc = get_phy_tunable(dev, useraddr);
3089                 break;
3090         case ETHTOOL_PHY_STUNABLE:
3091                 rc = set_phy_tunable(dev, useraddr);
3092                 break;
3093         case ETHTOOL_GFECPARAM:
3094                 rc = ethtool_get_fecparam(dev, useraddr);
3095                 break;
3096         case ETHTOOL_SFECPARAM:
3097                 rc = ethtool_set_fecparam(dev, useraddr);
3098                 break;
3099         default:
3100                 rc = -EOPNOTSUPP;
3101         }
3102
3103         if (dev->ethtool_ops->complete)
3104                 dev->ethtool_ops->complete(dev);
3105
3106         if (old_features != dev->features)
3107                 netdev_features_change(dev);
3108 out:
3109         if (dev->dev.parent)
3110                 pm_runtime_put(dev->dev.parent);
3111
3112         return rc;
3113 }
3114
3115 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3116 {
3117         struct ethtool_devlink_compat *state;
3118         u32 ethcmd;
3119         int rc;
3120
3121         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3122                 return -EFAULT;
3123
3124         state = kzalloc(sizeof(*state), GFP_KERNEL);
3125         if (!state)
3126                 return -ENOMEM;
3127
3128         switch (ethcmd) {
3129         case ETHTOOL_FLASHDEV:
3130                 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3131                         rc = -EFAULT;
3132                         goto exit_free;
3133                 }
3134                 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3135                 break;
3136         }
3137
3138         rtnl_lock();
3139         rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3140         rtnl_unlock();
3141         if (rc)
3142                 goto exit_free;
3143
3144         switch (ethcmd) {
3145         case ETHTOOL_FLASHDEV:
3146                 if (state->devlink)
3147                         rc = devlink_compat_flash_update(state->devlink,
3148                                                          state->efl.data);
3149                 break;
3150         case ETHTOOL_GDRVINFO:
3151                 if (state->devlink)
3152                         devlink_compat_running_version(state->devlink,
3153                                                        state->info.fw_version,
3154                                                        sizeof(state->info.fw_version));
3155                 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3156                         rc = -EFAULT;
3157                         goto exit_free;
3158                 }
3159                 break;
3160         }
3161
3162 exit_free:
3163         if (state->devlink)
3164                 devlink_put(state->devlink);
3165         kfree(state);
3166         return rc;
3167 }
3168
3169 struct ethtool_rx_flow_key {
3170         struct flow_dissector_key_basic                 basic;
3171         union {
3172                 struct flow_dissector_key_ipv4_addrs    ipv4;
3173                 struct flow_dissector_key_ipv6_addrs    ipv6;
3174         };
3175         struct flow_dissector_key_ports                 tp;
3176         struct flow_dissector_key_ip                    ip;
3177         struct flow_dissector_key_vlan                  vlan;
3178         struct flow_dissector_key_eth_addrs             eth_addrs;
3179 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3180
3181 struct ethtool_rx_flow_match {
3182         struct flow_dissector           dissector;
3183         struct ethtool_rx_flow_key      key;
3184         struct ethtool_rx_flow_key      mask;
3185 };
3186
3187 struct ethtool_rx_flow_rule *
3188 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3189 {
3190         const struct ethtool_rx_flow_spec *fs = input->fs;
3191         struct ethtool_rx_flow_match *match;
3192         struct ethtool_rx_flow_rule *flow;
3193         struct flow_action_entry *act;
3194
3195         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3196                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3197         if (!flow)
3198                 return ERR_PTR(-ENOMEM);
3199
3200         /* ethtool_rx supports only one single action per rule. */
3201         flow->rule = flow_rule_alloc(1);
3202         if (!flow->rule) {
3203                 kfree(flow);
3204                 return ERR_PTR(-ENOMEM);
3205         }
3206
3207         match = (struct ethtool_rx_flow_match *)flow->priv;
3208         flow->rule->match.dissector     = &match->dissector;
3209         flow->rule->match.mask          = &match->mask;
3210         flow->rule->match.key           = &match->key;
3211
3212         match->mask.basic.n_proto = htons(0xffff);
3213
3214         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3215         case ETHER_FLOW: {
3216                 const struct ethhdr *ether_spec, *ether_m_spec;
3217
3218                 ether_spec = &fs->h_u.ether_spec;
3219                 ether_m_spec = &fs->m_u.ether_spec;
3220
3221                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3222                         ether_addr_copy(match->key.eth_addrs.src,
3223                                         ether_spec->h_source);
3224                         ether_addr_copy(match->mask.eth_addrs.src,
3225                                         ether_m_spec->h_source);
3226                 }
3227                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3228                         ether_addr_copy(match->key.eth_addrs.dst,
3229                                         ether_spec->h_dest);
3230                         ether_addr_copy(match->mask.eth_addrs.dst,
3231                                         ether_m_spec->h_dest);
3232                 }
3233                 if (ether_m_spec->h_proto) {
3234                         match->key.basic.n_proto = ether_spec->h_proto;
3235                         match->mask.basic.n_proto = ether_m_spec->h_proto;
3236                 }
3237                 }
3238                 break;
3239         case TCP_V4_FLOW:
3240         case UDP_V4_FLOW: {
3241                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3242
3243                 match->key.basic.n_proto = htons(ETH_P_IP);
3244
3245                 v4_spec = &fs->h_u.tcp_ip4_spec;
3246                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3247
3248                 if (v4_m_spec->ip4src) {
3249                         match->key.ipv4.src = v4_spec->ip4src;
3250                         match->mask.ipv4.src = v4_m_spec->ip4src;
3251                 }
3252                 if (v4_m_spec->ip4dst) {
3253                         match->key.ipv4.dst = v4_spec->ip4dst;
3254                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
3255                 }
3256                 if (v4_m_spec->ip4src ||
3257                     v4_m_spec->ip4dst) {
3258                         match->dissector.used_keys |=
3259                                 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3260                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3261                                 offsetof(struct ethtool_rx_flow_key, ipv4);
3262                 }
3263                 if (v4_m_spec->psrc) {
3264                         match->key.tp.src = v4_spec->psrc;
3265                         match->mask.tp.src = v4_m_spec->psrc;
3266                 }
3267                 if (v4_m_spec->pdst) {
3268                         match->key.tp.dst = v4_spec->pdst;
3269                         match->mask.tp.dst = v4_m_spec->pdst;
3270                 }
3271                 if (v4_m_spec->psrc ||
3272                     v4_m_spec->pdst) {
3273                         match->dissector.used_keys |=
3274                                 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3275                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3276                                 offsetof(struct ethtool_rx_flow_key, tp);
3277                 }
3278                 if (v4_m_spec->tos) {
3279                         match->key.ip.tos = v4_spec->tos;
3280                         match->mask.ip.tos = v4_m_spec->tos;
3281                         match->dissector.used_keys |=
3282                                 BIT(FLOW_DISSECTOR_KEY_IP);
3283                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3284                                 offsetof(struct ethtool_rx_flow_key, ip);
3285                 }
3286                 }
3287                 break;
3288         case TCP_V6_FLOW:
3289         case UDP_V6_FLOW: {
3290                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3291
3292                 match->key.basic.n_proto = htons(ETH_P_IPV6);
3293
3294                 v6_spec = &fs->h_u.tcp_ip6_spec;
3295                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3296                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3297                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3298                                sizeof(match->key.ipv6.src));
3299                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3300                                sizeof(match->mask.ipv6.src));
3301                 }
3302                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3303                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3304                                sizeof(match->key.ipv6.dst));
3305                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3306                                sizeof(match->mask.ipv6.dst));
3307                 }
3308                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3309                     !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3310                         match->dissector.used_keys |=
3311                                 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3312                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3313                                 offsetof(struct ethtool_rx_flow_key, ipv6);
3314                 }
3315                 if (v6_m_spec->psrc) {
3316                         match->key.tp.src = v6_spec->psrc;
3317                         match->mask.tp.src = v6_m_spec->psrc;
3318                 }
3319                 if (v6_m_spec->pdst) {
3320                         match->key.tp.dst = v6_spec->pdst;
3321                         match->mask.tp.dst = v6_m_spec->pdst;
3322                 }
3323                 if (v6_m_spec->psrc ||
3324                     v6_m_spec->pdst) {
3325                         match->dissector.used_keys |=
3326                                 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3327                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3328                                 offsetof(struct ethtool_rx_flow_key, tp);
3329                 }
3330                 if (v6_m_spec->tclass) {
3331                         match->key.ip.tos = v6_spec->tclass;
3332                         match->mask.ip.tos = v6_m_spec->tclass;
3333                         match->dissector.used_keys |=
3334                                 BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3335                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3336                                 offsetof(struct ethtool_rx_flow_key, ip);
3337                 }
3338                 }
3339                 break;
3340         default:
3341                 ethtool_rx_flow_rule_destroy(flow);
3342                 return ERR_PTR(-EINVAL);
3343         }
3344
3345         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3346         case TCP_V4_FLOW:
3347         case TCP_V6_FLOW:
3348                 match->key.basic.ip_proto = IPPROTO_TCP;
3349                 match->mask.basic.ip_proto = 0xff;
3350                 break;
3351         case UDP_V4_FLOW:
3352         case UDP_V6_FLOW:
3353                 match->key.basic.ip_proto = IPPROTO_UDP;
3354                 match->mask.basic.ip_proto = 0xff;
3355                 break;
3356         }
3357
3358         match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3359         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3360                 offsetof(struct ethtool_rx_flow_key, basic);
3361
3362         if (fs->flow_type & FLOW_EXT) {
3363                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3364                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3365
3366                 if (ext_m_spec->vlan_etype) {
3367                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3368                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3369                 }
3370
3371                 if (ext_m_spec->vlan_tci) {
3372                         match->key.vlan.vlan_id =
3373                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3374                         match->mask.vlan.vlan_id =
3375                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3376
3377                         match->key.vlan.vlan_dei =
3378                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3379                         match->mask.vlan.vlan_dei =
3380                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3381
3382                         match->key.vlan.vlan_priority =
3383                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3384                         match->mask.vlan.vlan_priority =
3385                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3386                 }
3387
3388                 if (ext_m_spec->vlan_etype ||
3389                     ext_m_spec->vlan_tci) {
3390                         match->dissector.used_keys |=
3391                                 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3392                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3393                                 offsetof(struct ethtool_rx_flow_key, vlan);
3394                 }
3395         }
3396         if (fs->flow_type & FLOW_MAC_EXT) {
3397                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3398                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3399
3400                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3401                        ETH_ALEN);
3402                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3403                        ETH_ALEN);
3404
3405                 match->dissector.used_keys |=
3406                         BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3407                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3408                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3409         }
3410
3411         act = &flow->rule->action.entries[0];
3412         switch (fs->ring_cookie) {
3413         case RX_CLS_FLOW_DISC:
3414                 act->id = FLOW_ACTION_DROP;
3415                 break;
3416         case RX_CLS_FLOW_WAKE:
3417                 act->id = FLOW_ACTION_WAKE;
3418                 break;
3419         default:
3420                 act->id = FLOW_ACTION_QUEUE;
3421                 if (fs->flow_type & FLOW_RSS)
3422                         act->queue.ctx = input->rss_ctx;
3423
3424                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3425                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3426                 break;
3427         }
3428
3429         return flow;
3430 }
3431 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3432
3433 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3434 {
3435         kfree(flow->rule);
3436         kfree(flow);
3437 }
3438 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);