net/ethtool/ioctl.c

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