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 <linux/utsname.h>
  30 #include <net/devlink.h>
  31 #include <net/ipv6.h>
  32 #include <net/xdp_sock_drv.h>
  33 #include <net/flow_offload.h>
  34 #include <linux/ethtool_netlink.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, init_uts_ns.name.release,
 717                 sizeof(rsp->info.version));
 718         if (ops->get_drvinfo) {
 719                 ops->get_drvinfo(dev, &rsp->info);
 720                 if (!rsp->info.bus_info[0] && parent)
 721                         strscpy(rsp->info.bus_info, dev_name(parent),
 722                                 sizeof(rsp->info.bus_info));
 723                 if (!rsp->info.driver[0] && parent && parent->driver)
 724                         strscpy(rsp->info.driver, parent->driver->name,
 725                                 sizeof(rsp->info.driver));
 726         } else if (parent && parent->driver) {
 727                 strscpy(rsp->info.bus_info, dev_name(parent),
 728                         sizeof(rsp->info.bus_info));
 729                 strscpy(rsp->info.driver, parent->driver->name,
 730                         sizeof(rsp->info.driver));
 731         } else if (dev->rtnl_link_ops) {
 732                 strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
 733                         sizeof(rsp->info.driver));
 734         } else {
 735                 return -EOPNOTSUPP;
 736         }
 737
 738         /*
 739          * this method of obtaining string set info is deprecated;
 740          * Use ETHTOOL_GSSET_INFO instead.
 741          */
 742         if (ops->get_sset_count) {
 743                 int rc;
 744
 745                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 746                 if (rc >= 0)
 747                         rsp->info.testinfo_len = rc;
 748                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 749                 if (rc >= 0)
 750                         rsp->info.n_stats = rc;
 751                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 752                 if (rc >= 0)
 753                         rsp->info.n_priv_flags = rc;
 754         }
 755         if (ops->get_regs_len) {
 756                 int ret = ops->get_regs_len(dev);
 757
 758                 if (ret > 0)
 759                         rsp->info.regdump_len = ret;
 760         }
 761
 762         if (ops->get_eeprom_len)
 763                 rsp->info.eedump_len = ops->get_eeprom_len(dev);
 764
 765         if (!rsp->info.fw_version[0])
 766                 rsp->devlink = netdev_to_devlink_get(dev);
 767
 768         return 0;
 769 }
 770
 771 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 772                                                     void __user *useraddr)
 773 {
 774         struct ethtool_sset_info info;
 775         u64 sset_mask;
 776         int i, idx = 0, n_bits = 0, ret, rc;
 777         u32 *info_buf = NULL;
 778
 779         if (copy_from_user(&info, useraddr, sizeof(info)))
 780                 return -EFAULT;
 781
 782         /* store copy of mask, because we zero struct later on */
 783         sset_mask = info.sset_mask;
 784         if (!sset_mask)
 785                 return 0;
 786
 787         /* calculate size of return buffer */
 788         n_bits = hweight64(sset_mask);
 789
 790         memset(&info, 0, sizeof(info));
 791         info.cmd = ETHTOOL_GSSET_INFO;
 792
 793         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 794         if (!info_buf)
 795                 return -ENOMEM;
 796
 797         /*
 798          * fill return buffer based on input bitmask and successful
 799          * get_sset_count return
 800          */
 801         for (i = 0; i < 64; i++) {
 802                 if (!(sset_mask & (1ULL << i)))
 803                         continue;
 804
 805                 rc = __ethtool_get_sset_count(dev, i);
 806                 if (rc >= 0) {
 807                         info.sset_mask |= (1ULL << i);
 808                         info_buf[idx++] = rc;
 809                 }
 810         }
 811
 812         ret = -EFAULT;
 813         if (copy_to_user(useraddr, &info, sizeof(info)))
 814                 goto out;
 815
 816         useraddr += offsetof(struct ethtool_sset_info, data);
 817         if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
 818                 goto out;
 819
 820         ret = 0;
 821
 822 out:
 823         kfree(info_buf);
 824         return ret;
 825 }
 826
 827 static noinline_for_stack int
 828 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
 829                                const struct compat_ethtool_rxnfc __user *useraddr,
 830                                size_t size)
 831 {
 832         struct compat_ethtool_rxnfc crxnfc = {};
 833
 834         /* We expect there to be holes between fs.m_ext and
 835          * fs.ring_cookie and at the end of fs, but nowhere else.
 836          * On non-x86, no conversion should be needed.
 837          */
 838         BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
 839                      sizeof(struct compat_ethtool_rxnfc) !=
 840                      sizeof(struct ethtool_rxnfc));
 841         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
 842                      sizeof(useraddr->fs.m_ext) !=
 843                      offsetof(struct ethtool_rxnfc, fs.m_ext) +
 844                      sizeof(rxnfc->fs.m_ext));
 845         BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
 846                      offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
 847                      offsetof(struct ethtool_rxnfc, fs.location) -
 848                      offsetof(struct ethtool_rxnfc, fs.ring_cookie));
 849
 850         if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
 851                 return -EFAULT;
 852
 853         *rxnfc = (struct ethtool_rxnfc) {
 854                 .cmd            = crxnfc.cmd,
 855                 .flow_type      = crxnfc.flow_type,
 856                 .data           = crxnfc.data,
 857                 .fs             = {
 858                         .flow_type      = crxnfc.fs.flow_type,
 859                         .h_u            = crxnfc.fs.h_u,
 860                         .h_ext          = crxnfc.fs.h_ext,
 861                         .m_u            = crxnfc.fs.m_u,
 862                         .m_ext          = crxnfc.fs.m_ext,
 863                         .ring_cookie    = crxnfc.fs.ring_cookie,
 864                         .location       = crxnfc.fs.location,
 865                 },
 866                 .rule_cnt       = crxnfc.rule_cnt,
 867         };
 868
 869         return 0;
 870 }
 871
 872 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
 873                                         const void __user *useraddr,
 874                                         size_t size)
 875 {
 876         if (compat_need_64bit_alignment_fixup())
 877                 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
 878
 879         if (copy_from_user(rxnfc, useraddr, size))
 880                 return -EFAULT;
 881
 882         return 0;
 883 }
 884
 885 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
 886                                         const struct ethtool_rxnfc *rxnfc,
 887                                         size_t size, const u32 *rule_buf)
 888 {
 889         struct compat_ethtool_rxnfc crxnfc;
 890
 891         memset(&crxnfc, 0, sizeof(crxnfc));
 892         crxnfc = (struct compat_ethtool_rxnfc) {
 893                 .cmd            = rxnfc->cmd,
 894                 .flow_type      = rxnfc->flow_type,
 895                 .data           = rxnfc->data,
 896                 .fs             = {
 897                         .flow_type      = rxnfc->fs.flow_type,
 898                         .h_u            = rxnfc->fs.h_u,
 899                         .h_ext          = rxnfc->fs.h_ext,
 900                         .m_u            = rxnfc->fs.m_u,
 901                         .m_ext          = rxnfc->fs.m_ext,
 902                         .ring_cookie    = rxnfc->fs.ring_cookie,
 903                         .location       = rxnfc->fs.location,
 904                 },
 905                 .rule_cnt       = rxnfc->rule_cnt,
 906         };
 907
 908         if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
 909                 return -EFAULT;
 910
 911         return 0;
 912 }
 913
 914 static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
 915                                      size_t *info_size, void __user *useraddr)
 916 {
 917         /* struct ethtool_rxnfc was originally defined for
 918          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 919          * members.  User-space might still be using that
 920          * definition.
 921          */
 922         if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
 923                 *info_size = (offsetof(struct ethtool_rxnfc, data) +
 924                               sizeof(info->data));
 925
 926         if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 927                 return -EFAULT;
 928
 929         if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
 930                 *info_size = sizeof(*info);
 931                 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
 932                         return -EFAULT;
 933                 /* Since malicious users may modify the original data,
 934                  * we need to check whether FLOW_RSS is still requested.
 935                  */
 936                 if (!(info->flow_type & FLOW_RSS))
 937                         return -EINVAL;
 938         }
 939
 940         if (info->cmd != cmd)
 941                 return -EINVAL;
 942
 943         return 0;
 944 }
 945
 946 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
 947                                       const struct ethtool_rxnfc *rxnfc,
 948                                       size_t size, const u32 *rule_buf)
 949 {
 950         int ret;
 951
 952         if (compat_need_64bit_alignment_fixup()) {
 953                 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
 954                                                    rule_buf);
 955                 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
 956         } else {
 957                 ret = copy_to_user(useraddr, rxnfc, size);
 958                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 959         }
 960
 961         if (ret)
 962                 return -EFAULT;
 963
 964         if (rule_buf) {
 965                 if (copy_to_user(useraddr, rule_buf,
 966                                  rxnfc->rule_cnt * sizeof(u32)))
 967                         return -EFAULT;
 968         }
 969
 970         return 0;
 971 }
 972
 973 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 974                                                 u32 cmd, void __user *useraddr)
 975 {
 976         const struct ethtool_ops *ops = dev->ethtool_ops;
 977         struct ethtool_rxnfc info;
 978         size_t info_size = sizeof(info);
 979         int rc;
 980
 981         if (!ops->set_rxnfc)
 982                 return -EOPNOTSUPP;
 983
 984         rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
 985         if (rc)
 986                 return rc;
 987
 988         if (ops->get_rxfh) {
 989                 struct ethtool_rxfh_param rxfh = {};
 990
 991                 rc = ops->get_rxfh(dev, &rxfh);
 992                 if (rc)
 993                         return rc;
 994
 995                 /* Sanity check: if symmetric-xor is set, then:
 996                  * 1 - no other fields besides IP src/dst and/or L4 src/dst
 997                  * 2 - If src is set, dst must also be set
 998                  */
 999                 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1000                     ((info.data & ~(RXH_IP_SRC | RXH_IP_DST |
1001                                     RXH_L4_B_0_1 | RXH_L4_B_2_3)) ||
1002                      (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) ||
1003                      (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3))))
1004                         return -EINVAL;
1005         }
1006
1007         rc = ops->set_rxnfc(dev, &info);
1008         if (rc)
1009                 return rc;
1010
1011         if (cmd == ETHTOOL_SRXCLSRLINS &&
1012             ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
1013                 return -EFAULT;
1014
1015         return 0;
1016 }
1017
1018 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1019                                                 u32 cmd, void __user *useraddr)
1020 {
1021         struct ethtool_rxnfc info;
1022         size_t info_size = sizeof(info);
1023         const struct ethtool_ops *ops = dev->ethtool_ops;
1024         int ret;
1025         void *rule_buf = NULL;
1026
1027         if (!ops->get_rxnfc)
1028                 return -EOPNOTSUPP;
1029
1030         ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1031         if (ret)
1032                 return ret;
1033
1034         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1035                 if (info.rule_cnt > 0) {
1036                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1037                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1038                                                    GFP_USER);
1039                         if (!rule_buf)
1040                                 return -ENOMEM;
1041                 }
1042         }
1043
1044         ret = ops->get_rxnfc(dev, &info, rule_buf);
1045         if (ret < 0)
1046                 goto err_out;
1047
1048         ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1049 err_out:
1050         kfree(rule_buf);
1051
1052         return ret;
1053 }
1054
1055 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1056                                         struct ethtool_rxnfc *rx_rings,
1057                                         u32 size)
1058 {
1059         int i;
1060
1061         if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1062                 return -EFAULT;
1063
1064         /* Validate ring indices */
1065         for (i = 0; i < size; i++)
1066                 if (indir[i] >= rx_rings->data)
1067                         return -EINVAL;
1068
1069         return 0;
1070 }
1071
1072 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1073
1074 void netdev_rss_key_fill(void *buffer, size_t len)
1075 {
1076         BUG_ON(len > sizeof(netdev_rss_key));
1077         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1078         memcpy(buffer, netdev_rss_key, len);
1079 }
1080 EXPORT_SYMBOL(netdev_rss_key_fill);
1081
1082 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1083                                                      void __user *useraddr)
1084 {
1085         struct ethtool_rxfh_param rxfh = {};
1086         u32 user_size;
1087         int ret;
1088
1089         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1090             !dev->ethtool_ops->get_rxfh)
1091                 return -EOPNOTSUPP;
1092         rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1093         if (rxfh.indir_size == 0)
1094                 return -EOPNOTSUPP;
1095
1096         if (copy_from_user(&user_size,
1097                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1098                            sizeof(user_size)))
1099                 return -EFAULT;
1100
1101         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1102                          &rxfh.indir_size, sizeof(rxfh.indir_size)))
1103                 return -EFAULT;
1104
1105         /* If the user buffer size is 0, this is just a query for the
1106          * device table size.  Otherwise, if it's smaller than the
1107          * device table size it's an error.
1108          */
1109         if (user_size < rxfh.indir_size)
1110                 return user_size == 0 ? 0 : -EINVAL;
1111
1112         rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
1113         if (!rxfh.indir)
1114                 return -ENOMEM;
1115
1116         ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
1117         if (ret)
1118                 goto out;
1119         if (copy_to_user(useraddr +
1120                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1121                          rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
1122                 ret = -EFAULT;
1123
1124 out:
1125         kfree(rxfh.indir);
1126         return ret;
1127 }
1128
1129 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1130                                                      void __user *useraddr)
1131 {
1132         const struct ethtool_ops *ops = dev->ethtool_ops;
1133         struct ethtool_rxfh_param rxfh_dev = {};
1134         struct netlink_ext_ack *extack = NULL;
1135         struct ethtool_rxnfc rx_rings;
1136         u32 user_size, i;
1137         int ret;
1138         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1139
1140         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1141             !ops->get_rxnfc)
1142                 return -EOPNOTSUPP;
1143
1144         rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1145         if (rxfh_dev.indir_size == 0)
1146                 return -EOPNOTSUPP;
1147
1148         if (copy_from_user(&user_size,
1149                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1150                            sizeof(user_size)))
1151                 return -EFAULT;
1152
1153         if (user_size != 0 && user_size != rxfh_dev.indir_size)
1154                 return -EINVAL;
1155
1156         rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
1157                                  sizeof(rxfh_dev.indir[0]), GFP_USER);
1158         if (!rxfh_dev.indir)
1159                 return -ENOMEM;
1160
1161         rx_rings.cmd = ETHTOOL_GRXRINGS;
1162         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1163         if (ret)
1164                 goto out;
1165
1166         if (user_size == 0) {
1167                 u32 *indir = rxfh_dev.indir;
1168
1169                 for (i = 0; i < rxfh_dev.indir_size; i++)
1170                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1171         } else {
1172                 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1173                                                   useraddr + ringidx_offset,
1174                                                   &rx_rings,
1175                                                   rxfh_dev.indir_size);
1176                 if (ret)
1177                         goto out;
1178         }
1179
1180         rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;
1181         ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1182         if (ret)
1183                 goto out;
1184
1185         /* indicate whether rxfh was set to default */
1186         if (user_size == 0)
1187                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1188         else
1189                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1190
1191 out:
1192         kfree(rxfh_dev.indir);
1193         return ret;
1194 }
1195
1196 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1197                                                void __user *useraddr)
1198 {
1199         const struct ethtool_ops *ops = dev->ethtool_ops;
1200         struct ethtool_rxfh_param rxfh_dev = {};
1201         u32 user_indir_size, user_key_size;
1202         struct ethtool_rxfh rxfh;
1203         u32 indir_bytes;
1204         u8 *rss_config;
1205         u32 total_size;
1206         int ret;
1207
1208         if (!ops->get_rxfh)
1209                 return -EOPNOTSUPP;
1210
1211         if (ops->get_rxfh_indir_size)
1212                 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1213         if (ops->get_rxfh_key_size)
1214                 rxfh_dev.key_size = ops->get_rxfh_key_size(dev);
1215
1216         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1217                 return -EFAULT;
1218         user_indir_size = rxfh.indir_size;
1219         user_key_size = rxfh.key_size;
1220
1221         /* Check that reserved fields are 0 for now */
1222         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1223                 return -EINVAL;
1224         /* Most drivers don't handle rss_context, check it's 0 as well */
1225         if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1226                 return -EOPNOTSUPP;
1227
1228         rxfh.indir_size = rxfh_dev.indir_size;
1229         rxfh.key_size = rxfh_dev.key_size;
1230         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1231                 return -EFAULT;
1232
1233         if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
1234             (user_key_size && user_key_size != rxfh_dev.key_size))
1235                 return -EINVAL;
1236
1237         indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
1238         total_size = indir_bytes + user_key_size;
1239         rss_config = kzalloc(total_size, GFP_USER);
1240         if (!rss_config)
1241                 return -ENOMEM;
1242
1243         if (user_indir_size)
1244                 rxfh_dev.indir = (u32 *)rss_config;
1245
1246         if (user_key_size)
1247                 rxfh_dev.key = rss_config + indir_bytes;
1248
1249         rxfh_dev.rss_context = rxfh.rss_context;
1250
1251         ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
1252         if (ret)
1253                 goto out;
1254
1255         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1256                          &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
1257                 ret = -EFAULT;
1258         } else if (copy_to_user(useraddr +
1259                                 offsetof(struct ethtool_rxfh, input_xfrm),
1260                                 &rxfh_dev.input_xfrm,
1261                                 sizeof(rxfh.input_xfrm))) {
1262                 ret = -EFAULT;
1263         } else if (copy_to_user(useraddr +
1264                               offsetof(struct ethtool_rxfh, rss_config[0]),
1265                               rss_config, total_size)) {
1266                 ret = -EFAULT;
1267         }
1268 out:
1269         kfree(rss_config);
1270
1271         return ret;
1272 }
1273
1274 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1275                                                void __user *useraddr)
1276 {
1277         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1278         const struct ethtool_ops *ops = dev->ethtool_ops;
1279         u32 dev_indir_size = 0, dev_key_size = 0, i;
1280         struct ethtool_rxfh_param rxfh_dev = {};
1281         struct netlink_ext_ack *extack = NULL;
1282         struct ethtool_rxnfc rx_rings;
1283         struct ethtool_rxfh rxfh;
1284         u32 indir_bytes = 0;
1285         u8 *rss_config;
1286         int ret;
1287
1288         if (!ops->get_rxnfc || !ops->set_rxfh)
1289                 return -EOPNOTSUPP;
1290
1291         if (ops->get_rxfh_indir_size)
1292                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1293         if (ops->get_rxfh_key_size)
1294                 dev_key_size = ops->get_rxfh_key_size(dev);
1295
1296         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1297                 return -EFAULT;
1298
1299         /* Check that reserved fields are 0 for now */
1300         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1301                 return -EINVAL;
1302         /* Most drivers don't handle rss_context, check it's 0 as well */
1303         if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1304                 return -EOPNOTSUPP;
1305         /* Check input data transformation capabilities */
1306         if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
1307             rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
1308                 return -EINVAL;
1309         if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1310             !ops->cap_rss_sym_xor_supported)
1311                 return -EOPNOTSUPP;
1312
1313         /* If either indir, hash key or function is valid, proceed further.
1314          * Must request at least one change: indir size, hash key, function
1315          * or input transformation.
1316          */
1317         if ((rxfh.indir_size &&
1318              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1319              rxfh.indir_size != dev_indir_size) ||
1320             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1321             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1322              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
1323              rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
1324                 return -EINVAL;
1325
1326         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1327                 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);
1328
1329         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1330         if (!rss_config)
1331                 return -ENOMEM;
1332
1333         rx_rings.cmd = ETHTOOL_GRXRINGS;
1334         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1335         if (ret)
1336                 goto out;
1337
1338         /* rxfh.indir_size == 0 means reset the indir table to default (master
1339          * context) or delete the context (other RSS contexts).
1340          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1341          */
1342         if (rxfh.indir_size &&
1343             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1344                 rxfh_dev.indir = (u32 *)rss_config;
1345                 rxfh_dev.indir_size = dev_indir_size;
1346                 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1347                                                   useraddr + rss_cfg_offset,
1348                                                   &rx_rings,
1349                                                   rxfh.indir_size);
1350                 if (ret)
1351                         goto out;
1352         } else if (rxfh.indir_size == 0) {
1353                 if (rxfh.rss_context == 0) {
1354                         u32 *indir;
1355
1356                         rxfh_dev.indir = (u32 *)rss_config;
1357                         rxfh_dev.indir_size = dev_indir_size;
1358                         indir = rxfh_dev.indir;
1359                         for (i = 0; i < dev_indir_size; i++)
1360                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1361                 } else {
1362                         rxfh_dev.rss_delete = true;
1363                 }
1364         }
1365
1366         if (rxfh.key_size) {
1367                 rxfh_dev.key_size = dev_key_size;
1368                 rxfh_dev.key = rss_config + indir_bytes;
1369                 if (copy_from_user(rxfh_dev.key,
1370                                    useraddr + rss_cfg_offset + indir_bytes,
1371                                    rxfh.key_size)) {
1372                         ret = -EFAULT;
1373                         goto out;
1374                 }
1375         }
1376
1377         rxfh_dev.hfunc = rxfh.hfunc;
1378         rxfh_dev.rss_context = rxfh.rss_context;
1379         rxfh_dev.input_xfrm = rxfh.input_xfrm;
1380
1381         ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1382         if (ret)
1383                 goto out;
1384
1385         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1386                          &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
1387                 ret = -EFAULT;
1388
1389         if (!rxfh_dev.rss_context) {
1390                 /* indicate whether rxfh was set to default */
1391                 if (rxfh.indir_size == 0)
1392                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1393                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1394                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1395         }
1396
1397 out:
1398         kfree(rss_config);
1399         return ret;
1400 }
1401
1402 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1403 {
1404         struct ethtool_regs regs;
1405         const struct ethtool_ops *ops = dev->ethtool_ops;
1406         void *regbuf;
1407         int reglen, ret;
1408
1409         if (!ops->get_regs || !ops->get_regs_len)
1410                 return -EOPNOTSUPP;
1411
1412         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1413                 return -EFAULT;
1414
1415         reglen = ops->get_regs_len(dev);
1416         if (reglen <= 0)
1417                 return reglen;
1418
1419         if (regs.len > reglen)
1420                 regs.len = reglen;
1421
1422         regbuf = vzalloc(reglen);
1423         if (!regbuf)
1424                 return -ENOMEM;
1425
1426         if (regs.len < reglen)
1427                 reglen = regs.len;
1428
1429         ops->get_regs(dev, &regs, regbuf);
1430
1431         ret = -EFAULT;
1432         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1433                 goto out;
1434         useraddr += offsetof(struct ethtool_regs, data);
1435         if (copy_to_user(useraddr, regbuf, reglen))
1436                 goto out;
1437         ret = 0;
1438
1439  out:
1440         vfree(regbuf);
1441         return ret;
1442 }
1443
1444 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1445 {
1446         struct ethtool_value reset;
1447         int ret;
1448
1449         if (!dev->ethtool_ops->reset)
1450                 return -EOPNOTSUPP;
1451
1452         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1453                 return -EFAULT;
1454
1455         ret = dev->ethtool_ops->reset(dev, &reset.data);
1456         if (ret)
1457                 return ret;
1458
1459         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1460                 return -EFAULT;
1461         return 0;
1462 }
1463
1464 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1465 {
1466         struct ethtool_wolinfo wol;
1467
1468         if (!dev->ethtool_ops->get_wol)
1469                 return -EOPNOTSUPP;
1470
1471         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1472         wol.cmd = ETHTOOL_GWOL;
1473         dev->ethtool_ops->get_wol(dev, &wol);
1474
1475         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1476                 return -EFAULT;
1477         return 0;
1478 }
1479
1480 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1481 {
1482         struct ethtool_wolinfo wol, cur_wol;
1483         int ret;
1484
1485         if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1486                 return -EOPNOTSUPP;
1487
1488         memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1489         cur_wol.cmd = ETHTOOL_GWOL;
1490         dev->ethtool_ops->get_wol(dev, &cur_wol);
1491
1492         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1493                 return -EFAULT;
1494
1495         if (wol.wolopts & ~cur_wol.supported)
1496                 return -EINVAL;
1497
1498         if (wol.wolopts == cur_wol.wolopts &&
1499             !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1500                 return 0;
1501
1502         ret = dev->ethtool_ops->set_wol(dev, &wol);
1503         if (ret)
1504                 return ret;
1505
1506         dev->wol_enabled = !!wol.wolopts;
1507         ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1508
1509         return 0;
1510 }
1511
1512 static void eee_to_keee(struct ethtool_keee *keee,
1513                         const struct ethtool_eee *eee)
1514 {
1515         memset(keee, 0, sizeof(*keee));
1516
1517         keee->supported_u32 = eee->supported;
1518         keee->advertised_u32 = eee->advertised;
1519         keee->lp_advertised_u32 = eee->lp_advertised;
1520         keee->eee_active = eee->eee_active;
1521         keee->eee_enabled = eee->eee_enabled;
1522         keee->tx_lpi_enabled = eee->tx_lpi_enabled;
1523         keee->tx_lpi_timer = eee->tx_lpi_timer;
1524
1525         ethtool_convert_legacy_u32_to_link_mode(keee->supported,
1526                                                 eee->supported);
1527         ethtool_convert_legacy_u32_to_link_mode(keee->advertised,
1528                                                 eee->advertised);
1529         ethtool_convert_legacy_u32_to_link_mode(keee->lp_advertised,
1530                                                 eee->lp_advertised);
1531 }
1532
1533 static void keee_to_eee(struct ethtool_eee *eee,
1534                         const struct ethtool_keee *keee)
1535 {
1536         memset(eee, 0, sizeof(*eee));
1537
1538         eee->eee_active = keee->eee_active;
1539         eee->eee_enabled = keee->eee_enabled;
1540         eee->tx_lpi_enabled = keee->tx_lpi_enabled;
1541         eee->tx_lpi_timer = keee->tx_lpi_timer;
1542
1543         if (ethtool_eee_use_linkmodes(keee)) {
1544                 bool overflow;
1545
1546                 overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported,
1547                                                                     keee->supported);
1548                 ethtool_convert_link_mode_to_legacy_u32(&eee->advertised,
1549                                                         keee->advertised);
1550                 ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised,
1551                                                         keee->lp_advertised);
1552                 if (overflow)
1553                         pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n");
1554         } else {
1555                 eee->supported = keee->supported_u32;
1556                 eee->advertised = keee->advertised_u32;
1557                 eee->lp_advertised = keee->lp_advertised_u32;
1558         }
1559 }
1560
1561 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1562 {
1563         struct ethtool_keee keee;
1564         struct ethtool_eee eee;
1565         int rc;
1566
1567         if (!dev->ethtool_ops->get_eee)
1568                 return -EOPNOTSUPP;
1569
1570         memset(&keee, 0, sizeof(keee));
1571         rc = dev->ethtool_ops->get_eee(dev, &keee);
1572         if (rc)
1573                 return rc;
1574
1575         keee_to_eee(&eee, &keee);
1576         if (copy_to_user(useraddr, &eee, sizeof(eee)))
1577                 return -EFAULT;
1578
1579         return 0;
1580 }
1581
1582 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1583 {
1584         struct ethtool_keee keee;
1585         struct ethtool_eee eee;
1586         int ret;
1587
1588         if (!dev->ethtool_ops->set_eee)
1589                 return -EOPNOTSUPP;
1590
1591         if (copy_from_user(&eee, useraddr, sizeof(eee)))
1592                 return -EFAULT;
1593
1594         eee_to_keee(&keee, &eee);
1595         ret = dev->ethtool_ops->set_eee(dev, &keee);
1596         if (!ret)
1597                 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1598         return ret;
1599 }
1600
1601 static int ethtool_nway_reset(struct net_device *dev)
1602 {
1603         if (!dev->ethtool_ops->nway_reset)
1604                 return -EOPNOTSUPP;
1605
1606         return dev->ethtool_ops->nway_reset(dev);
1607 }
1608
1609 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1610 {
1611         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1612         int link = __ethtool_get_link(dev);
1613
1614         if (link < 0)
1615                 return link;
1616
1617         edata.data = link;
1618         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1619                 return -EFAULT;
1620         return 0;
1621 }
1622
1623 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1624                                   int (*getter)(struct net_device *,
1625                                                 struct ethtool_eeprom *, u8 *),
1626                                   u32 total_len)
1627 {
1628         struct ethtool_eeprom eeprom;
1629         void __user *userbuf = useraddr + sizeof(eeprom);
1630         u32 bytes_remaining;
1631         u8 *data;
1632         int ret = 0;
1633
1634         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1635                 return -EFAULT;
1636
1637         /* Check for wrap and zero */
1638         if (eeprom.offset + eeprom.len <= eeprom.offset)
1639                 return -EINVAL;
1640
1641         /* Check for exceeding total eeprom len */
1642         if (eeprom.offset + eeprom.len > total_len)
1643                 return -EINVAL;
1644
1645         data = kzalloc(PAGE_SIZE, GFP_USER);
1646         if (!data)
1647                 return -ENOMEM;
1648
1649         bytes_remaining = eeprom.len;
1650         while (bytes_remaining > 0) {
1651                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1652
1653                 ret = getter(dev, &eeprom, data);
1654                 if (ret)
1655                         break;
1656                 if (!eeprom.len) {
1657                         ret = -EIO;
1658                         break;
1659                 }
1660                 if (copy_to_user(userbuf, data, eeprom.len)) {
1661                         ret = -EFAULT;
1662                         break;
1663                 }
1664                 userbuf += eeprom.len;
1665                 eeprom.offset += eeprom.len;
1666                 bytes_remaining -= eeprom.len;
1667         }
1668
1669         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1670         eeprom.offset -= eeprom.len;
1671         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1672                 ret = -EFAULT;
1673
1674         kfree(data);
1675         return ret;
1676 }
1677
1678 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1679 {
1680         const struct ethtool_ops *ops = dev->ethtool_ops;
1681
1682         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1683             !ops->get_eeprom_len(dev))
1684                 return -EOPNOTSUPP;
1685
1686         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1687                                       ops->get_eeprom_len(dev));
1688 }
1689
1690 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1691 {
1692         struct ethtool_eeprom eeprom;
1693         const struct ethtool_ops *ops = dev->ethtool_ops;
1694         void __user *userbuf = useraddr + sizeof(eeprom);
1695         u32 bytes_remaining;
1696         u8 *data;
1697         int ret = 0;
1698
1699         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1700             !ops->get_eeprom_len(dev))
1701                 return -EOPNOTSUPP;
1702
1703         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1704                 return -EFAULT;
1705
1706         /* Check for wrap and zero */
1707         if (eeprom.offset + eeprom.len <= eeprom.offset)
1708                 return -EINVAL;
1709
1710         /* Check for exceeding total eeprom len */
1711         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1712                 return -EINVAL;
1713
1714         data = kzalloc(PAGE_SIZE, GFP_USER);
1715         if (!data)
1716                 return -ENOMEM;
1717
1718         bytes_remaining = eeprom.len;
1719         while (bytes_remaining > 0) {
1720                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1721
1722                 if (copy_from_user(data, userbuf, eeprom.len)) {
1723                         ret = -EFAULT;
1724                         break;
1725                 }
1726                 ret = ops->set_eeprom(dev, &eeprom, data);
1727                 if (ret)
1728                         break;
1729                 userbuf += eeprom.len;
1730                 eeprom.offset += eeprom.len;
1731                 bytes_remaining -= eeprom.len;
1732         }
1733
1734         kfree(data);
1735         return ret;
1736 }
1737
1738 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1739                                                    void __user *useraddr)
1740 {
1741         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1742         struct kernel_ethtool_coalesce kernel_coalesce = {};
1743         int ret;
1744
1745         if (!dev->ethtool_ops->get_coalesce)
1746                 return -EOPNOTSUPP;
1747
1748         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1749                                              NULL);
1750         if (ret)
1751                 return ret;
1752
1753         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1754                 return -EFAULT;
1755         return 0;
1756 }
1757
1758 static bool
1759 ethtool_set_coalesce_supported(struct net_device *dev,
1760                                struct ethtool_coalesce *coalesce)
1761 {
1762         u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1763         u32 nonzero_params = 0;
1764
1765         if (coalesce->rx_coalesce_usecs)
1766                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1767         if (coalesce->rx_max_coalesced_frames)
1768                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1769         if (coalesce->rx_coalesce_usecs_irq)
1770                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1771         if (coalesce->rx_max_coalesced_frames_irq)
1772                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1773         if (coalesce->tx_coalesce_usecs)
1774                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1775         if (coalesce->tx_max_coalesced_frames)
1776                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1777         if (coalesce->tx_coalesce_usecs_irq)
1778                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1779         if (coalesce->tx_max_coalesced_frames_irq)
1780                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1781         if (coalesce->stats_block_coalesce_usecs)
1782                 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1783         if (coalesce->use_adaptive_rx_coalesce)
1784                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1785         if (coalesce->use_adaptive_tx_coalesce)
1786                 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1787         if (coalesce->pkt_rate_low)
1788                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1789         if (coalesce->rx_coalesce_usecs_low)
1790                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1791         if (coalesce->rx_max_coalesced_frames_low)
1792                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1793         if (coalesce->tx_coalesce_usecs_low)
1794                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1795         if (coalesce->tx_max_coalesced_frames_low)
1796                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1797         if (coalesce->pkt_rate_high)
1798                 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1799         if (coalesce->rx_coalesce_usecs_high)
1800                 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1801         if (coalesce->rx_max_coalesced_frames_high)
1802                 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1803         if (coalesce->tx_coalesce_usecs_high)
1804                 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1805         if (coalesce->tx_max_coalesced_frames_high)
1806                 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1807         if (coalesce->rate_sample_interval)
1808                 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1809
1810         return (supported_params & nonzero_params) == nonzero_params;
1811 }
1812
1813 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1814                                                    void __user *useraddr)
1815 {
1816         struct kernel_ethtool_coalesce kernel_coalesce = {};
1817         struct ethtool_coalesce coalesce;
1818         int ret;
1819
1820         if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
1821                 return -EOPNOTSUPP;
1822
1823         ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1824                                              NULL);
1825         if (ret)
1826                 return ret;
1827
1828         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1829                 return -EFAULT;
1830
1831         if (!ethtool_set_coalesce_supported(dev, &coalesce))
1832                 return -EOPNOTSUPP;
1833
1834         ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1835                                              NULL);
1836         if (!ret)
1837                 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1838         return ret;
1839 }
1840
1841 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1842 {
1843         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1844         struct kernel_ethtool_ringparam kernel_ringparam = {};
1845
1846         if (!dev->ethtool_ops->get_ringparam)
1847                 return -EOPNOTSUPP;
1848
1849         dev->ethtool_ops->get_ringparam(dev, &ringparam,
1850                                         &kernel_ringparam, NULL);
1851
1852         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1853                 return -EFAULT;
1854         return 0;
1855 }
1856
1857 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1858 {
1859         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1860         struct kernel_ethtool_ringparam kernel_ringparam;
1861         int ret;
1862
1863         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1864                 return -EOPNOTSUPP;
1865
1866         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1867                 return -EFAULT;
1868
1869         dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
1870
1871         /* ensure new ring parameters are within the maximums */
1872         if (ringparam.rx_pending > max.rx_max_pending ||
1873             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1874             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1875             ringparam.tx_pending > max.tx_max_pending)
1876                 return -EINVAL;
1877
1878         ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
1879                                               &kernel_ringparam, NULL);
1880         if (!ret)
1881                 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1882         return ret;
1883 }
1884
1885 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1886                                                    void __user *useraddr)
1887 {
1888         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1889
1890         if (!dev->ethtool_ops->get_channels)
1891                 return -EOPNOTSUPP;
1892
1893         dev->ethtool_ops->get_channels(dev, &channels);
1894
1895         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1896                 return -EFAULT;
1897         return 0;
1898 }
1899
1900 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1901                                                    void __user *useraddr)
1902 {
1903         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1904         u16 from_channel, to_channel;
1905         u64 max_rxnfc_in_use;
1906         u32 max_rxfh_in_use;
1907         unsigned int i;
1908         int ret;
1909
1910         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1911                 return -EOPNOTSUPP;
1912
1913         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1914                 return -EFAULT;
1915
1916         dev->ethtool_ops->get_channels(dev, &curr);
1917
1918         if (channels.rx_count == curr.rx_count &&
1919             channels.tx_count == curr.tx_count &&
1920             channels.combined_count == curr.combined_count &&
1921             channels.other_count == curr.other_count)
1922                 return 0;
1923
1924         /* ensure new counts are within the maximums */
1925         if (channels.rx_count > curr.max_rx ||
1926             channels.tx_count > curr.max_tx ||
1927             channels.combined_count > curr.max_combined ||
1928             channels.other_count > curr.max_other)
1929                 return -EINVAL;
1930
1931         /* ensure there is at least one RX and one TX channel */
1932         if (!channels.combined_count &&
1933             (!channels.rx_count || !channels.tx_count))
1934                 return -EINVAL;
1935
1936         /* ensure the new Rx count fits within the configured Rx flow
1937          * indirection table/rxnfc settings */
1938         if (ethtool_get_max_rxnfc_channel(dev, &max_rxnfc_in_use))
1939                 max_rxnfc_in_use = 0;
1940         if (!netif_is_rxfh_configured(dev) ||
1941             ethtool_get_max_rxfh_channel(dev, &max_rxfh_in_use))
1942                 max_rxfh_in_use = 0;
1943         if (channels.combined_count + channels.rx_count <=
1944             max_t(u64, max_rxnfc_in_use, max_rxfh_in_use))
1945                 return -EINVAL;
1946
1947         /* Disabling channels, query zero-copy AF_XDP sockets */
1948         from_channel = channels.combined_count +
1949                 min(channels.rx_count, channels.tx_count);
1950         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1951         for (i = from_channel; i < to_channel; i++)
1952                 if (xsk_get_pool_from_qid(dev, i))
1953                         return -EINVAL;
1954
1955         ret = dev->ethtool_ops->set_channels(dev, &channels);
1956         if (!ret)
1957                 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1958         return ret;
1959 }
1960
1961 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1962 {
1963         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1964
1965         if (!dev->ethtool_ops->get_pauseparam)
1966                 return -EOPNOTSUPP;
1967
1968         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1969
1970         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1971                 return -EFAULT;
1972         return 0;
1973 }
1974
1975 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1976 {
1977         struct ethtool_pauseparam pauseparam;
1978         int ret;
1979
1980         if (!dev->ethtool_ops->set_pauseparam)
1981                 return -EOPNOTSUPP;
1982
1983         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1984                 return -EFAULT;
1985
1986         ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1987         if (!ret)
1988                 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1989         return ret;
1990 }
1991
1992 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1993 {
1994         struct ethtool_test test;
1995         const struct ethtool_ops *ops = dev->ethtool_ops;
1996         u64 *data;
1997         int ret, test_len;
1998
1999         if (!ops->self_test || !ops->get_sset_count)
2000                 return -EOPNOTSUPP;
2001
2002         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
2003         if (test_len < 0)
2004                 return test_len;
2005         WARN_ON(test_len == 0);
2006
2007         if (copy_from_user(&test, useraddr, sizeof(test)))
2008                 return -EFAULT;
2009
2010         test.len = test_len;
2011         data = kcalloc(test_len, sizeof(u64), GFP_USER);
2012         if (!data)
2013                 return -ENOMEM;
2014
2015         netif_testing_on(dev);
2016         ops->self_test(dev, &test, data);
2017         netif_testing_off(dev);
2018
2019         ret = -EFAULT;
2020         if (copy_to_user(useraddr, &test, sizeof(test)))
2021                 goto out;
2022         useraddr += sizeof(test);
2023         if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
2024                 goto out;
2025         ret = 0;
2026
2027  out:
2028         kfree(data);
2029         return ret;
2030 }
2031
2032 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
2033 {
2034         struct ethtool_gstrings gstrings;
2035         u8 *data;
2036         int ret;
2037
2038         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
2039                 return -EFAULT;
2040
2041         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
2042         if (ret < 0)
2043                 return ret;
2044         if (ret > S32_MAX / ETH_GSTRING_LEN)
2045                 return -ENOMEM;
2046         WARN_ON_ONCE(!ret);
2047
2048         gstrings.len = ret;
2049
2050         if (gstrings.len) {
2051                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
2052                 if (!data)
2053                         return -ENOMEM;
2054
2055                 __ethtool_get_strings(dev, gstrings.string_set, data);
2056         } else {
2057                 data = NULL;
2058         }
2059
2060         ret = -EFAULT;
2061         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
2062                 goto out;
2063         useraddr += sizeof(gstrings);
2064         if (gstrings.len &&
2065             copy_to_user(useraddr, data,
2066                          array_size(gstrings.len, ETH_GSTRING_LEN)))
2067                 goto out;
2068         ret = 0;
2069
2070 out:
2071         vfree(data);
2072         return ret;
2073 }
2074
2075 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
2076 {
2077         va_list args;
2078
2079         va_start(args, fmt);
2080         vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
2081         va_end(args);
2082
2083         *data += ETH_GSTRING_LEN;
2084 }
2085 EXPORT_SYMBOL(ethtool_sprintf);
2086
2087 void ethtool_puts(u8 **data, const char *str)
2088 {
2089         strscpy(*data, str, ETH_GSTRING_LEN);
2090         *data += ETH_GSTRING_LEN;
2091 }
2092 EXPORT_SYMBOL(ethtool_puts);
2093
2094 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
2095 {
2096         struct ethtool_value id;
2097         static bool busy;
2098         const struct ethtool_ops *ops = dev->ethtool_ops;
2099         netdevice_tracker dev_tracker;
2100         int rc;
2101
2102         if (!ops->set_phys_id)
2103                 return -EOPNOTSUPP;
2104
2105         if (busy)
2106                 return -EBUSY;
2107
2108         if (copy_from_user(&id, useraddr, sizeof(id)))
2109                 return -EFAULT;
2110
2111         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2112         if (rc < 0)
2113                 return rc;
2114
2115         /* Drop the RTNL lock while waiting, but prevent reentry or
2116          * removal of the device.
2117          */
2118         busy = true;
2119         netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2120         rtnl_unlock();
2121
2122         if (rc == 0) {
2123                 /* Driver will handle this itself */
2124                 schedule_timeout_interruptible(
2125                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2126         } else {
2127                 /* Driver expects to be called at twice the frequency in rc */
2128                 int n = rc * 2, interval = HZ / n;
2129                 u64 count = mul_u32_u32(n, id.data);
2130                 u64 i = 0;
2131
2132                 do {
2133                         rtnl_lock();
2134                         rc = ops->set_phys_id(dev,
2135                                     (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2136                         rtnl_unlock();
2137                         if (rc)
2138                                 break;
2139                         schedule_timeout_interruptible(interval);
2140                 } while (!signal_pending(current) && (!id.data || i < count));
2141         }
2142
2143         rtnl_lock();
2144         netdev_put(dev, &dev_tracker);
2145         busy = false;
2146
2147         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2148         return rc;
2149 }
2150
2151 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2152 {
2153         struct ethtool_stats stats;
2154         const struct ethtool_ops *ops = dev->ethtool_ops;
2155         u64 *data;
2156         int ret, n_stats;
2157
2158         if (!ops->get_ethtool_stats || !ops->get_sset_count)
2159                 return -EOPNOTSUPP;
2160
2161         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2162         if (n_stats < 0)
2163                 return n_stats;
2164         if (n_stats > S32_MAX / sizeof(u64))
2165                 return -ENOMEM;
2166         WARN_ON_ONCE(!n_stats);
2167         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2168                 return -EFAULT;
2169
2170         stats.n_stats = n_stats;
2171
2172         if (n_stats) {
2173                 data = vzalloc(array_size(n_stats, sizeof(u64)));
2174                 if (!data)
2175                         return -ENOMEM;
2176                 ops->get_ethtool_stats(dev, &stats, data);
2177         } else {
2178                 data = NULL;
2179         }
2180
2181         ret = -EFAULT;
2182         if (copy_to_user(useraddr, &stats, sizeof(stats)))
2183                 goto out;
2184         useraddr += sizeof(stats);
2185         if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2186                 goto out;
2187         ret = 0;
2188
2189  out:
2190         vfree(data);
2191         return ret;
2192 }
2193
2194 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2195 {
2196         if (n_stats < 0)
2197                 return n_stats;
2198         if (n_stats > S32_MAX / sizeof(u64))
2199                 return -ENOMEM;
2200         if (WARN_ON_ONCE(!n_stats))
2201                 return -EOPNOTSUPP;
2202
2203         *data = vzalloc(array_size(n_stats, sizeof(u64)));
2204         if (!*data)
2205                 return -ENOMEM;
2206
2207         return 0;
2208 }
2209
2210 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2211                                          struct ethtool_stats *stats,
2212                                          u64 **data)
2213  {
2214         const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2215         int n_stats, ret;
2216
2217         if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2218                 return -EOPNOTSUPP;
2219
2220         n_stats = phy_ops->get_sset_count(phydev);
2221
2222         ret = ethtool_vzalloc_stats_array(n_stats, data);
2223         if (ret)
2224                 return ret;
2225
2226         stats->n_stats = n_stats;
2227         return phy_ops->get_stats(phydev, stats, *data);
2228 }
2229
2230 static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2231                                           struct ethtool_stats *stats,
2232                                           u64 **data)
2233 {
2234         const struct ethtool_ops *ops = dev->ethtool_ops;
2235         int n_stats, ret;
2236
2237         if (!ops || !ops->get_sset_count || ops->get_ethtool_phy_stats)
2238                 return -EOPNOTSUPP;
2239
2240         n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2241
2242         ret = ethtool_vzalloc_stats_array(n_stats, data);
2243         if (ret)
2244                 return ret;
2245
2246         stats->n_stats = n_stats;
2247         ops->get_ethtool_phy_stats(dev, stats, *data);
2248
2249         return 0;
2250 }
2251
2252 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2253 {
2254         struct phy_device *phydev = dev->phydev;
2255         struct ethtool_stats stats;
2256         u64 *data = NULL;
2257         int ret = -EOPNOTSUPP;
2258
2259         if (copy_from_user(&stats, useraddr, sizeof(stats)))
2260                 return -EFAULT;
2261
2262         if (phydev)
2263                 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2264
2265         if (ret == -EOPNOTSUPP)
2266                 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2267
2268         if (ret)
2269                 goto out;
2270
2271         if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2272                 ret = -EFAULT;
2273                 goto out;
2274         }
2275
2276         useraddr += sizeof(stats);
2277         if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2278                 ret = -EFAULT;
2279
2280  out:
2281         vfree(data);
2282         return ret;
2283 }
2284
2285 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2286 {
2287         struct ethtool_perm_addr epaddr;
2288
2289         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2290                 return -EFAULT;
2291
2292         if (epaddr.size < dev->addr_len)
2293                 return -ETOOSMALL;
2294         epaddr.size = dev->addr_len;
2295
2296         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2297                 return -EFAULT;
2298         useraddr += sizeof(epaddr);
2299         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2300                 return -EFAULT;
2301         return 0;
2302 }
2303
2304 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2305                              u32 cmd, u32 (*actor)(struct net_device *))
2306 {
2307         struct ethtool_value edata = { .cmd = cmd };
2308
2309         if (!actor)
2310                 return -EOPNOTSUPP;
2311
2312         edata.data = actor(dev);
2313
2314         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2315                 return -EFAULT;
2316         return 0;
2317 }
2318
2319 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2320                              void (*actor)(struct net_device *, u32))
2321 {
2322         struct ethtool_value edata;
2323
2324         if (!actor)
2325                 return -EOPNOTSUPP;
2326
2327         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2328                 return -EFAULT;
2329
2330         actor(dev, edata.data);
2331         return 0;
2332 }
2333
2334 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2335                              int (*actor)(struct net_device *, u32))
2336 {
2337         struct ethtool_value edata;
2338
2339         if (!actor)
2340                 return -EOPNOTSUPP;
2341
2342         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2343                 return -EFAULT;
2344
2345         return actor(dev, edata.data);
2346 }
2347
2348 static int
2349 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2350 {
2351         if (!dev->ethtool_ops->flash_device) {
2352                 req->devlink = netdev_to_devlink_get(dev);
2353                 return 0;
2354         }
2355
2356         return dev->ethtool_ops->flash_device(dev, &req->efl);
2357 }
2358
2359 static int ethtool_set_dump(struct net_device *dev,
2360                         void __user *useraddr)
2361 {
2362         struct ethtool_dump dump;
2363
2364         if (!dev->ethtool_ops->set_dump)
2365                 return -EOPNOTSUPP;
2366
2367         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2368                 return -EFAULT;
2369
2370         return dev->ethtool_ops->set_dump(dev, &dump);
2371 }
2372
2373 static int ethtool_get_dump_flag(struct net_device *dev,
2374                                 void __user *useraddr)
2375 {
2376         int ret;
2377         struct ethtool_dump dump;
2378         const struct ethtool_ops *ops = dev->ethtool_ops;
2379
2380         if (!ops->get_dump_flag)
2381                 return -EOPNOTSUPP;
2382
2383         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2384                 return -EFAULT;
2385
2386         ret = ops->get_dump_flag(dev, &dump);
2387         if (ret)
2388                 return ret;
2389
2390         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2391                 return -EFAULT;
2392         return 0;
2393 }
2394
2395 static int ethtool_get_dump_data(struct net_device *dev,
2396                                 void __user *useraddr)
2397 {
2398         int ret;
2399         __u32 len;
2400         struct ethtool_dump dump, tmp;
2401         const struct ethtool_ops *ops = dev->ethtool_ops;
2402         void *data = NULL;
2403
2404         if (!ops->get_dump_data || !ops->get_dump_flag)
2405                 return -EOPNOTSUPP;
2406
2407         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2408                 return -EFAULT;
2409
2410         memset(&tmp, 0, sizeof(tmp));
2411         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2412         ret = ops->get_dump_flag(dev, &tmp);
2413         if (ret)
2414                 return ret;
2415
2416         len = min(tmp.len, dump.len);
2417         if (!len)
2418                 return -EFAULT;
2419
2420         /* Don't ever let the driver think there's more space available
2421          * than it requested with .get_dump_flag().
2422          */
2423         dump.len = len;
2424
2425         /* Always allocate enough space to hold the whole thing so that the
2426          * driver does not need to check the length and bother with partial
2427          * dumping.
2428          */
2429         data = vzalloc(tmp.len);
2430         if (!data)
2431                 return -ENOMEM;
2432         ret = ops->get_dump_data(dev, &dump, data);
2433         if (ret)
2434                 goto out;
2435
2436         /* There are two sane possibilities:
2437          * 1. The driver's .get_dump_data() does not touch dump.len.
2438          * 2. Or it may set dump.len to how much it really writes, which
2439          *    should be tmp.len (or len if it can do a partial dump).
2440          * In any case respond to userspace with the actual length of data
2441          * it's receiving.
2442          */
2443         WARN_ON(dump.len != len && dump.len != tmp.len);
2444         dump.len = len;
2445
2446         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2447                 ret = -EFAULT;
2448                 goto out;
2449         }
2450         useraddr += offsetof(struct ethtool_dump, data);
2451         if (copy_to_user(useraddr, data, len))
2452                 ret = -EFAULT;
2453 out:
2454         vfree(data);
2455         return ret;
2456 }
2457
2458 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2459 {
2460         struct ethtool_ts_info info;
2461         int err;
2462
2463         err = __ethtool_get_ts_info(dev, &info);
2464         if (err)
2465                 return err;
2466
2467         if (copy_to_user(useraddr, &info, sizeof(info)))
2468                 return -EFAULT;
2469
2470         return 0;
2471 }
2472
2473 int ethtool_get_module_info_call(struct net_device *dev,
2474                                  struct ethtool_modinfo *modinfo)
2475 {
2476         const struct ethtool_ops *ops = dev->ethtool_ops;
2477         struct phy_device *phydev = dev->phydev;
2478
2479         if (dev->sfp_bus)
2480                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2481
2482         if (phydev && phydev->drv && phydev->drv->module_info)
2483                 return phydev->drv->module_info(phydev, modinfo);
2484
2485         if (ops->get_module_info)
2486                 return ops->get_module_info(dev, modinfo);
2487
2488         return -EOPNOTSUPP;
2489 }
2490
2491 static int ethtool_get_module_info(struct net_device *dev,
2492                                    void __user *useraddr)
2493 {
2494         int ret;
2495         struct ethtool_modinfo modinfo;
2496
2497         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2498                 return -EFAULT;
2499
2500         ret = ethtool_get_module_info_call(dev, &modinfo);
2501         if (ret)
2502                 return ret;
2503
2504         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2505                 return -EFAULT;
2506
2507         return 0;
2508 }
2509
2510 int ethtool_get_module_eeprom_call(struct net_device *dev,
2511                                    struct ethtool_eeprom *ee, u8 *data)
2512 {
2513         const struct ethtool_ops *ops = dev->ethtool_ops;
2514         struct phy_device *phydev = dev->phydev;
2515
2516         if (dev->sfp_bus)
2517                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2518
2519         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2520                 return phydev->drv->module_eeprom(phydev, ee, data);
2521
2522         if (ops->get_module_eeprom)
2523                 return ops->get_module_eeprom(dev, ee, data);
2524
2525         return -EOPNOTSUPP;
2526 }
2527
2528 static int ethtool_get_module_eeprom(struct net_device *dev,
2529                                      void __user *useraddr)
2530 {
2531         int ret;
2532         struct ethtool_modinfo modinfo;
2533
2534         ret = ethtool_get_module_info_call(dev, &modinfo);
2535         if (ret)
2536                 return ret;
2537
2538         return ethtool_get_any_eeprom(dev, useraddr,
2539                                       ethtool_get_module_eeprom_call,
2540                                       modinfo.eeprom_len);
2541 }
2542
2543 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2544 {
2545         switch (tuna->id) {
2546         case ETHTOOL_RX_COPYBREAK:
2547         case ETHTOOL_TX_COPYBREAK:
2548         case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2549                 if (tuna->len != sizeof(u32) ||
2550                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2551                         return -EINVAL;
2552                 break;
2553         case ETHTOOL_PFC_PREVENTION_TOUT:
2554                 if (tuna->len != sizeof(u16) ||
2555                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2556                         return -EINVAL;
2557                 break;
2558         default:
2559                 return -EINVAL;
2560         }
2561
2562         return 0;
2563 }
2564
2565 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2566 {
2567         int ret;
2568         struct ethtool_tunable tuna;
2569         const struct ethtool_ops *ops = dev->ethtool_ops;
2570         void *data;
2571
2572         if (!ops->get_tunable)
2573                 return -EOPNOTSUPP;
2574         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2575                 return -EFAULT;
2576         ret = ethtool_tunable_valid(&tuna);
2577         if (ret)
2578                 return ret;
2579         data = kzalloc(tuna.len, GFP_USER);
2580         if (!data)
2581                 return -ENOMEM;
2582         ret = ops->get_tunable(dev, &tuna, data);
2583         if (ret)
2584                 goto out;
2585         useraddr += sizeof(tuna);
2586         ret = -EFAULT;
2587         if (copy_to_user(useraddr, data, tuna.len))
2588                 goto out;
2589         ret = 0;
2590
2591 out:
2592         kfree(data);
2593         return ret;
2594 }
2595
2596 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2597 {
2598         int ret;
2599         struct ethtool_tunable tuna;
2600         const struct ethtool_ops *ops = dev->ethtool_ops;
2601         void *data;
2602
2603         if (!ops->set_tunable)
2604                 return -EOPNOTSUPP;
2605         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2606                 return -EFAULT;
2607         ret = ethtool_tunable_valid(&tuna);
2608         if (ret)
2609                 return ret;
2610         useraddr += sizeof(tuna);
2611         data = memdup_user(useraddr, tuna.len);
2612         if (IS_ERR(data))
2613                 return PTR_ERR(data);
2614         ret = ops->set_tunable(dev, &tuna, data);
2615
2616         kfree(data);
2617         return ret;
2618 }
2619
2620 static noinline_for_stack int
2621 ethtool_get_per_queue_coalesce(struct net_device *dev,
2622                                void __user *useraddr,
2623                                struct ethtool_per_queue_op *per_queue_opt)
2624 {
2625         u32 bit;
2626         int ret;
2627         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2628
2629         if (!dev->ethtool_ops->get_per_queue_coalesce)
2630                 return -EOPNOTSUPP;
2631
2632         useraddr += sizeof(*per_queue_opt);
2633
2634         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2635                           MAX_NUM_QUEUE);
2636
2637         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2638                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2639
2640                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2641                 if (ret != 0)
2642                         return ret;
2643                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2644                         return -EFAULT;
2645                 useraddr += sizeof(coalesce);
2646         }
2647
2648         return 0;
2649 }
2650
2651 static noinline_for_stack int
2652 ethtool_set_per_queue_coalesce(struct net_device *dev,
2653                                void __user *useraddr,
2654                                struct ethtool_per_queue_op *per_queue_opt)
2655 {
2656         u32 bit;
2657         int i, ret = 0;
2658         int n_queue;
2659         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2660         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2661
2662         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2663             (!dev->ethtool_ops->get_per_queue_coalesce))
2664                 return -EOPNOTSUPP;
2665
2666         useraddr += sizeof(*per_queue_opt);
2667
2668         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2669         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2670         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2671         if (!backup)
2672                 return -ENOMEM;
2673
2674         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2675                 struct ethtool_coalesce coalesce;
2676
2677                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2678                 if (ret != 0)
2679                         goto roll_back;
2680
2681                 tmp++;
2682
2683                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2684                         ret = -EFAULT;
2685                         goto roll_back;
2686                 }
2687
2688                 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2689                         ret = -EOPNOTSUPP;
2690                         goto roll_back;
2691                 }
2692
2693                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2694                 if (ret != 0)
2695                         goto roll_back;
2696
2697                 useraddr += sizeof(coalesce);
2698         }
2699
2700 roll_back:
2701         if (ret != 0) {
2702                 tmp = backup;
2703                 for_each_set_bit(i, queue_mask, bit) {
2704                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2705                         tmp++;
2706                 }
2707         }
2708         kfree(backup);
2709
2710         return ret;
2711 }
2712
2713 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2714                                  void __user *useraddr, u32 sub_cmd)
2715 {
2716         struct ethtool_per_queue_op per_queue_opt;
2717
2718         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2719                 return -EFAULT;
2720
2721         if (per_queue_opt.sub_command != sub_cmd)
2722                 return -EINVAL;
2723
2724         switch (per_queue_opt.sub_command) {
2725         case ETHTOOL_GCOALESCE:
2726                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2727         case ETHTOOL_SCOALESCE:
2728                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2729         default:
2730                 return -EOPNOTSUPP;
2731         }
2732 }
2733
2734 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2735 {
2736         switch (tuna->id) {
2737         case ETHTOOL_PHY_DOWNSHIFT:
2738         case ETHTOOL_PHY_FAST_LINK_DOWN:
2739                 if (tuna->len != sizeof(u8) ||
2740                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2741                         return -EINVAL;
2742                 break;
2743         case ETHTOOL_PHY_EDPD:
2744                 if (tuna->len != sizeof(u16) ||
2745                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2746                         return -EINVAL;
2747                 break;
2748         default:
2749                 return -EINVAL;
2750         }
2751
2752         return 0;
2753 }
2754
2755 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2756 {
2757         struct phy_device *phydev = dev->phydev;
2758         struct ethtool_tunable tuna;
2759         bool phy_drv_tunable;
2760         void *data;
2761         int ret;
2762
2763         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2764         if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2765                 return -EOPNOTSUPP;
2766         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2767                 return -EFAULT;
2768         ret = ethtool_phy_tunable_valid(&tuna);
2769         if (ret)
2770                 return ret;
2771         data = kzalloc(tuna.len, GFP_USER);
2772         if (!data)
2773                 return -ENOMEM;
2774         if (phy_drv_tunable) {
2775                 mutex_lock(&phydev->lock);
2776                 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2777                 mutex_unlock(&phydev->lock);
2778         } else {
2779                 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2780         }
2781         if (ret)
2782                 goto out;
2783         useraddr += sizeof(tuna);
2784         ret = -EFAULT;
2785         if (copy_to_user(useraddr, data, tuna.len))
2786                 goto out;
2787         ret = 0;
2788
2789 out:
2790         kfree(data);
2791         return ret;
2792 }
2793
2794 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2795 {
2796         struct phy_device *phydev = dev->phydev;
2797         struct ethtool_tunable tuna;
2798         bool phy_drv_tunable;
2799         void *data;
2800         int ret;
2801
2802         phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2803         if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2804                 return -EOPNOTSUPP;
2805         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2806                 return -EFAULT;
2807         ret = ethtool_phy_tunable_valid(&tuna);
2808         if (ret)
2809                 return ret;
2810         useraddr += sizeof(tuna);
2811         data = memdup_user(useraddr, tuna.len);
2812         if (IS_ERR(data))
2813                 return PTR_ERR(data);
2814         if (phy_drv_tunable) {
2815                 mutex_lock(&phydev->lock);
2816                 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2817                 mutex_unlock(&phydev->lock);
2818         } else {
2819                 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2820         }
2821
2822         kfree(data);
2823         return ret;
2824 }
2825
2826 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2827 {
2828         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2829         int rc;
2830
2831         if (!dev->ethtool_ops->get_fecparam)
2832                 return -EOPNOTSUPP;
2833
2834         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2835         if (rc)
2836                 return rc;
2837
2838         if (WARN_ON_ONCE(fecparam.reserved))
2839                 fecparam.reserved = 0;
2840
2841         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2842                 return -EFAULT;
2843         return 0;
2844 }
2845
2846 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2847 {
2848         struct ethtool_fecparam fecparam;
2849
2850         if (!dev->ethtool_ops->set_fecparam)
2851                 return -EOPNOTSUPP;
2852
2853         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2854                 return -EFAULT;
2855
2856         if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2857                 return -EINVAL;
2858
2859         fecparam.active_fec = 0;
2860         fecparam.reserved = 0;
2861
2862         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2863 }
2864
2865 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2866
2867 static int
2868 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2869               u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2870 {
2871         struct net_device *dev;
2872         u32 sub_cmd;
2873         int rc;
2874         netdev_features_t old_features;
2875
2876         dev = __dev_get_by_name(net, ifr->ifr_name);
2877         if (!dev)
2878                 return -ENODEV;
2879
2880         if (ethcmd == ETHTOOL_PERQUEUE) {
2881                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2882                         return -EFAULT;
2883         } else {
2884                 sub_cmd = ethcmd;
2885         }
2886         /* Allow some commands to be done by anyone */
2887         switch (sub_cmd) {
2888         case ETHTOOL_GSET:
2889         case ETHTOOL_GDRVINFO:
2890         case ETHTOOL_GMSGLVL:
2891         case ETHTOOL_GLINK:
2892         case ETHTOOL_GCOALESCE:
2893         case ETHTOOL_GRINGPARAM:
2894         case ETHTOOL_GPAUSEPARAM:
2895         case ETHTOOL_GRXCSUM:
2896         case ETHTOOL_GTXCSUM:
2897         case ETHTOOL_GSG:
2898         case ETHTOOL_GSSET_INFO:
2899         case ETHTOOL_GSTRINGS:
2900         case ETHTOOL_GSTATS:
2901         case ETHTOOL_GPHYSTATS:
2902         case ETHTOOL_GTSO:
2903         case ETHTOOL_GPERMADDR:
2904         case ETHTOOL_GUFO:
2905         case ETHTOOL_GGSO:
2906         case ETHTOOL_GGRO:
2907         case ETHTOOL_GFLAGS:
2908         case ETHTOOL_GPFLAGS:
2909         case ETHTOOL_GRXFH:
2910         case ETHTOOL_GRXRINGS:
2911         case ETHTOOL_GRXCLSRLCNT:
2912         case ETHTOOL_GRXCLSRULE:
2913         case ETHTOOL_GRXCLSRLALL:
2914         case ETHTOOL_GRXFHINDIR:
2915         case ETHTOOL_GRSSH:
2916         case ETHTOOL_GFEATURES:
2917         case ETHTOOL_GCHANNELS:
2918         case ETHTOOL_GET_TS_INFO:
2919         case ETHTOOL_GEEE:
2920         case ETHTOOL_GTUNABLE:
2921         case ETHTOOL_PHY_GTUNABLE:
2922         case ETHTOOL_GLINKSETTINGS:
2923         case ETHTOOL_GFECPARAM:
2924                 break;
2925         default:
2926                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2927                         return -EPERM;
2928         }
2929
2930         if (dev->dev.parent)
2931                 pm_runtime_get_sync(dev->dev.parent);
2932
2933         if (!netif_device_present(dev)) {
2934                 rc = -ENODEV;
2935                 goto out;
2936         }
2937
2938         if (dev->ethtool_ops->begin) {
2939                 rc = dev->ethtool_ops->begin(dev);
2940                 if (rc < 0)
2941                         goto out;
2942         }
2943         old_features = dev->features;
2944
2945         switch (ethcmd) {
2946         case ETHTOOL_GSET:
2947                 rc = ethtool_get_settings(dev, useraddr);
2948                 break;
2949         case ETHTOOL_SSET:
2950                 rc = ethtool_set_settings(dev, useraddr);
2951                 break;
2952         case ETHTOOL_GDRVINFO:
2953                 rc = ethtool_get_drvinfo(dev, devlink_state);
2954                 break;
2955         case ETHTOOL_GREGS:
2956                 rc = ethtool_get_regs(dev, useraddr);
2957                 break;
2958         case ETHTOOL_GWOL:
2959                 rc = ethtool_get_wol(dev, useraddr);
2960                 break;
2961         case ETHTOOL_SWOL:
2962                 rc = ethtool_set_wol(dev, useraddr);
2963                 break;
2964         case ETHTOOL_GMSGLVL:
2965                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2966                                        dev->ethtool_ops->get_msglevel);
2967                 break;
2968         case ETHTOOL_SMSGLVL:
2969                 rc = ethtool_set_value_void(dev, useraddr,
2970                                        dev->ethtool_ops->set_msglevel);
2971                 if (!rc)
2972                         ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2973                 break;
2974         case ETHTOOL_GEEE:
2975                 rc = ethtool_get_eee(dev, useraddr);
2976                 break;
2977         case ETHTOOL_SEEE:
2978                 rc = ethtool_set_eee(dev, useraddr);
2979                 break;
2980         case ETHTOOL_NWAY_RST:
2981                 rc = ethtool_nway_reset(dev);
2982                 break;
2983         case ETHTOOL_GLINK:
2984                 rc = ethtool_get_link(dev, useraddr);
2985                 break;
2986         case ETHTOOL_GEEPROM:
2987                 rc = ethtool_get_eeprom(dev, useraddr);
2988                 break;
2989         case ETHTOOL_SEEPROM:
2990                 rc = ethtool_set_eeprom(dev, useraddr);
2991                 break;
2992         case ETHTOOL_GCOALESCE:
2993                 rc = ethtool_get_coalesce(dev, useraddr);
2994                 break;
2995         case ETHTOOL_SCOALESCE:
2996                 rc = ethtool_set_coalesce(dev, useraddr);
2997                 break;
2998         case ETHTOOL_GRINGPARAM:
2999                 rc = ethtool_get_ringparam(dev, useraddr);
3000                 break;
3001         case ETHTOOL_SRINGPARAM:
3002                 rc = ethtool_set_ringparam(dev, useraddr);
3003                 break;
3004         case ETHTOOL_GPAUSEPARAM:
3005                 rc = ethtool_get_pauseparam(dev, useraddr);
3006                 break;
3007         case ETHTOOL_SPAUSEPARAM:
3008                 rc = ethtool_set_pauseparam(dev, useraddr);
3009                 break;
3010         case ETHTOOL_TEST:
3011                 rc = ethtool_self_test(dev, useraddr);
3012                 break;
3013         case ETHTOOL_GSTRINGS:
3014                 rc = ethtool_get_strings(dev, useraddr);
3015                 break;
3016         case ETHTOOL_PHYS_ID:
3017                 rc = ethtool_phys_id(dev, useraddr);
3018                 break;
3019         case ETHTOOL_GSTATS:
3020                 rc = ethtool_get_stats(dev, useraddr);
3021                 break;
3022         case ETHTOOL_GPERMADDR:
3023                 rc = ethtool_get_perm_addr(dev, useraddr);
3024                 break;
3025         case ETHTOOL_GFLAGS:
3026                 rc = ethtool_get_value(dev, useraddr, ethcmd,
3027                                         __ethtool_get_flags);
3028                 break;
3029         case ETHTOOL_SFLAGS:
3030                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3031                 break;
3032         case ETHTOOL_GPFLAGS:
3033                 rc = ethtool_get_value(dev, useraddr, ethcmd,
3034                                        dev->ethtool_ops->get_priv_flags);
3035                 if (!rc)
3036                         ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
3037                 break;
3038         case ETHTOOL_SPFLAGS:
3039                 rc = ethtool_set_value(dev, useraddr,
3040                                        dev->ethtool_ops->set_priv_flags);
3041                 break;
3042         case ETHTOOL_GRXFH:
3043         case ETHTOOL_GRXRINGS:
3044         case ETHTOOL_GRXCLSRLCNT:
3045         case ETHTOOL_GRXCLSRULE:
3046         case ETHTOOL_GRXCLSRLALL:
3047                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
3048                 break;
3049         case ETHTOOL_SRXFH:
3050         case ETHTOOL_SRXCLSRLDEL:
3051         case ETHTOOL_SRXCLSRLINS:
3052                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
3053                 break;
3054         case ETHTOOL_FLASHDEV:
3055                 rc = ethtool_flash_device(dev, devlink_state);
3056                 break;
3057         case ETHTOOL_RESET:
3058                 rc = ethtool_reset(dev, useraddr);
3059                 break;
3060         case ETHTOOL_GSSET_INFO:
3061                 rc = ethtool_get_sset_info(dev, useraddr);
3062                 break;
3063         case ETHTOOL_GRXFHINDIR:
3064                 rc = ethtool_get_rxfh_indir(dev, useraddr);
3065                 break;
3066         case ETHTOOL_SRXFHINDIR:
3067                 rc = ethtool_set_rxfh_indir(dev, useraddr);
3068                 break;
3069         case ETHTOOL_GRSSH:
3070                 rc = ethtool_get_rxfh(dev, useraddr);
3071                 break;
3072         case ETHTOOL_SRSSH:
3073                 rc = ethtool_set_rxfh(dev, useraddr);
3074                 break;
3075         case ETHTOOL_GFEATURES:
3076                 rc = ethtool_get_features(dev, useraddr);
3077                 break;
3078         case ETHTOOL_SFEATURES:
3079                 rc = ethtool_set_features(dev, useraddr);
3080                 break;
3081         case ETHTOOL_GTXCSUM:
3082         case ETHTOOL_GRXCSUM:
3083         case ETHTOOL_GSG:
3084         case ETHTOOL_GTSO:
3085         case ETHTOOL_GGSO:
3086         case ETHTOOL_GGRO:
3087                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
3088                 break;
3089         case ETHTOOL_STXCSUM:
3090         case ETHTOOL_SRXCSUM:
3091         case ETHTOOL_SSG:
3092         case ETHTOOL_STSO:
3093         case ETHTOOL_SGSO:
3094         case ETHTOOL_SGRO:
3095                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
3096                 break;
3097         case ETHTOOL_GCHANNELS:
3098                 rc = ethtool_get_channels(dev, useraddr);
3099                 break;
3100         case ETHTOOL_SCHANNELS:
3101                 rc = ethtool_set_channels(dev, useraddr);
3102                 break;
3103         case ETHTOOL_SET_DUMP:
3104                 rc = ethtool_set_dump(dev, useraddr);
3105                 break;
3106         case ETHTOOL_GET_DUMP_FLAG:
3107                 rc = ethtool_get_dump_flag(dev, useraddr);
3108                 break;
3109         case ETHTOOL_GET_DUMP_DATA:
3110                 rc = ethtool_get_dump_data(dev, useraddr);
3111                 break;
3112         case ETHTOOL_GET_TS_INFO:
3113                 rc = ethtool_get_ts_info(dev, useraddr);
3114                 break;
3115         case ETHTOOL_GMODULEINFO:
3116                 rc = ethtool_get_module_info(dev, useraddr);
3117                 break;
3118         case ETHTOOL_GMODULEEEPROM:
3119                 rc = ethtool_get_module_eeprom(dev, useraddr);
3120                 break;
3121         case ETHTOOL_GTUNABLE:
3122                 rc = ethtool_get_tunable(dev, useraddr);
3123                 break;
3124         case ETHTOOL_STUNABLE:
3125                 rc = ethtool_set_tunable(dev, useraddr);
3126                 break;
3127         case ETHTOOL_GPHYSTATS:
3128                 rc = ethtool_get_phy_stats(dev, useraddr);
3129                 break;
3130         case ETHTOOL_PERQUEUE:
3131                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3132                 break;
3133         case ETHTOOL_GLINKSETTINGS:
3134                 rc = ethtool_get_link_ksettings(dev, useraddr);
3135                 break;
3136         case ETHTOOL_SLINKSETTINGS:
3137                 rc = ethtool_set_link_ksettings(dev, useraddr);
3138                 break;
3139         case ETHTOOL_PHY_GTUNABLE:
3140                 rc = get_phy_tunable(dev, useraddr);
3141                 break;
3142         case ETHTOOL_PHY_STUNABLE:
3143                 rc = set_phy_tunable(dev, useraddr);
3144                 break;
3145         case ETHTOOL_GFECPARAM:
3146                 rc = ethtool_get_fecparam(dev, useraddr);
3147                 break;
3148         case ETHTOOL_SFECPARAM:
3149                 rc = ethtool_set_fecparam(dev, useraddr);
3150                 break;
3151         default:
3152                 rc = -EOPNOTSUPP;
3153         }
3154
3155         if (dev->ethtool_ops->complete)
3156                 dev->ethtool_ops->complete(dev);
3157
3158         if (old_features != dev->features)
3159                 netdev_features_change(dev);
3160 out:
3161         if (dev->dev.parent)
3162                 pm_runtime_put(dev->dev.parent);
3163
3164         return rc;
3165 }
3166
3167 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3168 {
3169         struct ethtool_devlink_compat *state;
3170         u32 ethcmd;
3171         int rc;
3172
3173         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3174                 return -EFAULT;
3175
3176         state = kzalloc(sizeof(*state), GFP_KERNEL);
3177         if (!state)
3178                 return -ENOMEM;
3179
3180         switch (ethcmd) {
3181         case ETHTOOL_FLASHDEV:
3182                 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3183                         rc = -EFAULT;
3184                         goto exit_free;
3185                 }
3186                 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3187                 break;
3188         }
3189
3190         rtnl_lock();
3191         rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3192         rtnl_unlock();
3193         if (rc)
3194                 goto exit_free;
3195
3196         switch (ethcmd) {
3197         case ETHTOOL_FLASHDEV:
3198                 if (state->devlink)
3199                         rc = devlink_compat_flash_update(state->devlink,
3200                                                          state->efl.data);
3201                 break;
3202         case ETHTOOL_GDRVINFO:
3203                 if (state->devlink)
3204                         devlink_compat_running_version(state->devlink,
3205                                                        state->info.fw_version,
3206                                                        sizeof(state->info.fw_version));
3207                 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3208                         rc = -EFAULT;
3209                         goto exit_free;
3210                 }
3211                 break;
3212         }
3213
3214 exit_free:
3215         if (state->devlink)
3216                 devlink_put(state->devlink);
3217         kfree(state);
3218         return rc;
3219 }
3220
3221 struct ethtool_rx_flow_key {
3222         struct flow_dissector_key_basic                 basic;
3223         union {
3224                 struct flow_dissector_key_ipv4_addrs    ipv4;
3225                 struct flow_dissector_key_ipv6_addrs    ipv6;
3226         };
3227         struct flow_dissector_key_ports                 tp;
3228         struct flow_dissector_key_ip                    ip;
3229         struct flow_dissector_key_vlan                  vlan;
3230         struct flow_dissector_key_eth_addrs             eth_addrs;
3231 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3232
3233 struct ethtool_rx_flow_match {
3234         struct flow_dissector           dissector;
3235         struct ethtool_rx_flow_key      key;
3236         struct ethtool_rx_flow_key      mask;
3237 };
3238
3239 struct ethtool_rx_flow_rule *
3240 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3241 {
3242         const struct ethtool_rx_flow_spec *fs = input->fs;
3243         struct ethtool_rx_flow_match *match;
3244         struct ethtool_rx_flow_rule *flow;
3245         struct flow_action_entry *act;
3246
3247         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3248                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3249         if (!flow)
3250                 return ERR_PTR(-ENOMEM);
3251
3252         /* ethtool_rx supports only one single action per rule. */
3253         flow->rule = flow_rule_alloc(1);
3254         if (!flow->rule) {
3255                 kfree(flow);
3256                 return ERR_PTR(-ENOMEM);
3257         }
3258
3259         match = (struct ethtool_rx_flow_match *)flow->priv;
3260         flow->rule->match.dissector     = &match->dissector;
3261         flow->rule->match.mask          = &match->mask;
3262         flow->rule->match.key           = &match->key;
3263
3264         match->mask.basic.n_proto = htons(0xffff);
3265
3266         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3267         case ETHER_FLOW: {
3268                 const struct ethhdr *ether_spec, *ether_m_spec;
3269
3270                 ether_spec = &fs->h_u.ether_spec;
3271                 ether_m_spec = &fs->m_u.ether_spec;
3272
3273                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3274                         ether_addr_copy(match->key.eth_addrs.src,
3275                                         ether_spec->h_source);
3276                         ether_addr_copy(match->mask.eth_addrs.src,
3277                                         ether_m_spec->h_source);
3278                 }
3279                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3280                         ether_addr_copy(match->key.eth_addrs.dst,
3281                                         ether_spec->h_dest);
3282                         ether_addr_copy(match->mask.eth_addrs.dst,
3283                                         ether_m_spec->h_dest);
3284                 }
3285                 if (ether_m_spec->h_proto) {
3286                         match->key.basic.n_proto = ether_spec->h_proto;
3287                         match->mask.basic.n_proto = ether_m_spec->h_proto;
3288                 }
3289                 }
3290                 break;
3291         case TCP_V4_FLOW:
3292         case UDP_V4_FLOW: {
3293                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3294
3295                 match->key.basic.n_proto = htons(ETH_P_IP);
3296
3297                 v4_spec = &fs->h_u.tcp_ip4_spec;
3298                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3299
3300                 if (v4_m_spec->ip4src) {
3301                         match->key.ipv4.src = v4_spec->ip4src;
3302                         match->mask.ipv4.src = v4_m_spec->ip4src;
3303                 }
3304                 if (v4_m_spec->ip4dst) {
3305                         match->key.ipv4.dst = v4_spec->ip4dst;
3306                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
3307                 }
3308                 if (v4_m_spec->ip4src ||
3309                     v4_m_spec->ip4dst) {
3310                         match->dissector.used_keys |=
3311                                 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3312                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3313                                 offsetof(struct ethtool_rx_flow_key, ipv4);
3314                 }
3315                 if (v4_m_spec->psrc) {
3316                         match->key.tp.src = v4_spec->psrc;
3317                         match->mask.tp.src = v4_m_spec->psrc;
3318                 }
3319                 if (v4_m_spec->pdst) {
3320                         match->key.tp.dst = v4_spec->pdst;
3321                         match->mask.tp.dst = v4_m_spec->pdst;
3322                 }
3323                 if (v4_m_spec->psrc ||
3324                     v4_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 (v4_m_spec->tos) {
3331                         match->key.ip.tos = v4_spec->tos;
3332                         match->mask.ip.tos = v4_m_spec->tos;
3333                         match->dissector.used_keys |=
3334                                 BIT(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         case TCP_V6_FLOW:
3341         case UDP_V6_FLOW: {
3342                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3343
3344                 match->key.basic.n_proto = htons(ETH_P_IPV6);
3345
3346                 v6_spec = &fs->h_u.tcp_ip6_spec;
3347                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3348                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3349                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3350                                sizeof(match->key.ipv6.src));
3351                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3352                                sizeof(match->mask.ipv6.src));
3353                 }
3354                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3355                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3356                                sizeof(match->key.ipv6.dst));
3357                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3358                                sizeof(match->mask.ipv6.dst));
3359                 }
3360                 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3361                     !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3362                         match->dissector.used_keys |=
3363                                 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3364                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3365                                 offsetof(struct ethtool_rx_flow_key, ipv6);
3366                 }
3367                 if (v6_m_spec->psrc) {
3368                         match->key.tp.src = v6_spec->psrc;
3369                         match->mask.tp.src = v6_m_spec->psrc;
3370                 }
3371                 if (v6_m_spec->pdst) {
3372                         match->key.tp.dst = v6_spec->pdst;
3373                         match->mask.tp.dst = v6_m_spec->pdst;
3374                 }
3375                 if (v6_m_spec->psrc ||
3376                     v6_m_spec->pdst) {
3377                         match->dissector.used_keys |=
3378                                 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3379                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3380                                 offsetof(struct ethtool_rx_flow_key, tp);
3381                 }
3382                 if (v6_m_spec->tclass) {
3383                         match->key.ip.tos = v6_spec->tclass;
3384                         match->mask.ip.tos = v6_m_spec->tclass;
3385                         match->dissector.used_keys |=
3386                                 BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3387                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3388                                 offsetof(struct ethtool_rx_flow_key, ip);
3389                 }
3390                 }
3391                 break;
3392         default:
3393                 ethtool_rx_flow_rule_destroy(flow);
3394                 return ERR_PTR(-EINVAL);
3395         }
3396
3397         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3398         case TCP_V4_FLOW:
3399         case TCP_V6_FLOW:
3400                 match->key.basic.ip_proto = IPPROTO_TCP;
3401                 match->mask.basic.ip_proto = 0xff;
3402                 break;
3403         case UDP_V4_FLOW:
3404         case UDP_V6_FLOW:
3405                 match->key.basic.ip_proto = IPPROTO_UDP;
3406                 match->mask.basic.ip_proto = 0xff;
3407                 break;
3408         }
3409
3410         match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3411         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3412                 offsetof(struct ethtool_rx_flow_key, basic);
3413
3414         if (fs->flow_type & FLOW_EXT) {
3415                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3416                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3417
3418                 if (ext_m_spec->vlan_etype) {
3419                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3420                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3421                 }
3422
3423                 if (ext_m_spec->vlan_tci) {
3424                         match->key.vlan.vlan_id =
3425                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3426                         match->mask.vlan.vlan_id =
3427                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3428
3429                         match->key.vlan.vlan_dei =
3430                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3431                         match->mask.vlan.vlan_dei =
3432                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3433
3434                         match->key.vlan.vlan_priority =
3435                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3436                         match->mask.vlan.vlan_priority =
3437                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3438                 }
3439
3440                 if (ext_m_spec->vlan_etype ||
3441                     ext_m_spec->vlan_tci) {
3442                         match->dissector.used_keys |=
3443                                 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3444                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3445                                 offsetof(struct ethtool_rx_flow_key, vlan);
3446                 }
3447         }
3448         if (fs->flow_type & FLOW_MAC_EXT) {
3449                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3450                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3451
3452                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3453                        ETH_ALEN);
3454                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3455                        ETH_ALEN);
3456
3457                 match->dissector.used_keys |=
3458                         BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3459                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3460                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3461         }
3462
3463         act = &flow->rule->action.entries[0];
3464         switch (fs->ring_cookie) {
3465         case RX_CLS_FLOW_DISC:
3466                 act->id = FLOW_ACTION_DROP;
3467                 break;
3468         case RX_CLS_FLOW_WAKE:
3469                 act->id = FLOW_ACTION_WAKE;
3470                 break;
3471         default:
3472                 act->id = FLOW_ACTION_QUEUE;
3473                 if (fs->flow_type & FLOW_RSS)
3474                         act->queue.ctx = input->rss_ctx;
3475
3476                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3477                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3478                 break;
3479         }
3480
3481         return flow;
3482 }
3483 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3484
3485 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3486 {
3487         kfree(flow->rule);
3488         kfree(flow);
3489 }
3490 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);