net/ethtool/ioctl.c

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