net/ethtool/ioctl.c

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