net/ethtool/ioctl.c

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