net/ethtool/ioctl.c

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