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