net/core/ethtool.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/ethtool.c - Ethtool ioctl handler
   4  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   5  *
   6  * This file is where we call all the ethtool_ops commands to get
   7  * the information ethtool needs.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/types.h>
  12 #include <linux/capability.h>
  13 #include <linux/errno.h>
  14 #include <linux/ethtool.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/net_tstamp.h>
  17 #include <linux/phy.h>
  18 #include <linux/bitops.h>
  19 #include <linux/uaccess.h>
  20 #include <linux/vmalloc.h>
  21 #include <linux/sfp.h>
  22 #include <linux/slab.h>
  23 #include <linux/rtnetlink.h>
  24 #include <linux/sched/signal.h>
  25 #include <linux/net.h>
  26 #include <net/devlink.h>
  27 #include <net/xdp_sock.h>
  28 #include <net/flow_offload.h>
  29
  30 /*
  31  * Some useful ethtool_ops methods that're device independent.
  32  * If we find that all drivers want to do the same thing here,
  33  * we can turn these into dev_() function calls.
  34  */
  35
  36 u32 ethtool_op_get_link(struct net_device *dev)
  37 {
  38         return netif_carrier_ok(dev) ? 1 : 0;
  39 }
  40 EXPORT_SYMBOL(ethtool_op_get_link);
  41
  42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
  43 {
  44         info->so_timestamping =
  45                 SOF_TIMESTAMPING_TX_SOFTWARE |
  46                 SOF_TIMESTAMPING_RX_SOFTWARE |
  47                 SOF_TIMESTAMPING_SOFTWARE;
  48         info->phc_index = -1;
  49         return 0;
  50 }
  51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
  52
  53 /* Handlers for each ethtool command */
  54
  55 #define ETHTOOL_DEV_FEATURE_WORDS       ((NETDEV_FEATURE_COUNT + 31) / 32)
  56
  57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
  58         [NETIF_F_SG_BIT] =               "tx-scatter-gather",
  59         [NETIF_F_IP_CSUM_BIT] =          "tx-checksum-ipv4",
  60         [NETIF_F_HW_CSUM_BIT] =          "tx-checksum-ip-generic",
  61         [NETIF_F_IPV6_CSUM_BIT] =        "tx-checksum-ipv6",
  62         [NETIF_F_HIGHDMA_BIT] =          "highdma",
  63         [NETIF_F_FRAGLIST_BIT] =         "tx-scatter-gather-fraglist",
  64         [NETIF_F_HW_VLAN_CTAG_TX_BIT] =  "tx-vlan-hw-insert",
  65
  66         [NETIF_F_HW_VLAN_CTAG_RX_BIT] =  "rx-vlan-hw-parse",
  67         [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
  68         [NETIF_F_HW_VLAN_STAG_TX_BIT] =  "tx-vlan-stag-hw-insert",
  69         [NETIF_F_HW_VLAN_STAG_RX_BIT] =  "rx-vlan-stag-hw-parse",
  70         [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
  71         [NETIF_F_VLAN_CHALLENGED_BIT] =  "vlan-challenged",
  72         [NETIF_F_GSO_BIT] =              "tx-generic-segmentation",
  73         [NETIF_F_LLTX_BIT] =             "tx-lockless",
  74         [NETIF_F_NETNS_LOCAL_BIT] =      "netns-local",
  75         [NETIF_F_GRO_BIT] =              "rx-gro",
  76         [NETIF_F_GRO_HW_BIT] =           "rx-gro-hw",
  77         [NETIF_F_LRO_BIT] =              "rx-lro",
  78
  79         [NETIF_F_TSO_BIT] =              "tx-tcp-segmentation",
  80         [NETIF_F_GSO_ROBUST_BIT] =       "tx-gso-robust",
  81         [NETIF_F_TSO_ECN_BIT] =          "tx-tcp-ecn-segmentation",
  82         [NETIF_F_TSO_MANGLEID_BIT] =     "tx-tcp-mangleid-segmentation",
  83         [NETIF_F_TSO6_BIT] =             "tx-tcp6-segmentation",
  84         [NETIF_F_FSO_BIT] =              "tx-fcoe-segmentation",
  85         [NETIF_F_GSO_GRE_BIT] =          "tx-gre-segmentation",
  86         [NETIF_F_GSO_GRE_CSUM_BIT] =     "tx-gre-csum-segmentation",
  87         [NETIF_F_GSO_IPXIP4_BIT] =       "tx-ipxip4-segmentation",
  88         [NETIF_F_GSO_IPXIP6_BIT] =       "tx-ipxip6-segmentation",
  89         [NETIF_F_GSO_UDP_TUNNEL_BIT] =   "tx-udp_tnl-segmentation",
  90         [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
  91         [NETIF_F_GSO_PARTIAL_BIT] =      "tx-gso-partial",
  92         [NETIF_F_GSO_SCTP_BIT] =         "tx-sctp-segmentation",
  93         [NETIF_F_GSO_ESP_BIT] =          "tx-esp-segmentation",
  94         [NETIF_F_GSO_UDP_L4_BIT] =       "tx-udp-segmentation",
  95
  96         [NETIF_F_FCOE_CRC_BIT] =         "tx-checksum-fcoe-crc",
  97         [NETIF_F_SCTP_CRC_BIT] =        "tx-checksum-sctp",
  98         [NETIF_F_FCOE_MTU_BIT] =         "fcoe-mtu",
  99         [NETIF_F_NTUPLE_BIT] =           "rx-ntuple-filter",
 100         [NETIF_F_RXHASH_BIT] =           "rx-hashing",
 101         [NETIF_F_RXCSUM_BIT] =           "rx-checksum",
 102         [NETIF_F_NOCACHE_COPY_BIT] =     "tx-nocache-copy",
 103         [NETIF_F_LOOPBACK_BIT] =         "loopback",
 104         [NETIF_F_RXFCS_BIT] =            "rx-fcs",
 105         [NETIF_F_RXALL_BIT] =            "rx-all",
 106         [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
 107         [NETIF_F_HW_TC_BIT] =            "hw-tc-offload",
 108         [NETIF_F_HW_ESP_BIT] =           "esp-hw-offload",
 109         [NETIF_F_HW_ESP_TX_CSUM_BIT] =   "esp-tx-csum-hw-offload",
 110         [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] =       "rx-udp_tunnel-port-offload",
 111         [NETIF_F_HW_TLS_RECORD_BIT] =   "tls-hw-record",
 112         [NETIF_F_HW_TLS_TX_BIT] =        "tls-hw-tx-offload",
 113         [NETIF_F_HW_TLS_RX_BIT] =        "tls-hw-rx-offload",
 114 };
 115
 116 static const char
 117 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
 118         [ETH_RSS_HASH_TOP_BIT] =        "toeplitz",
 119         [ETH_RSS_HASH_XOR_BIT] =        "xor",
 120         [ETH_RSS_HASH_CRC32_BIT] =      "crc32",
 121 };
 122
 123 static const char
 124 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 125         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 126         [ETHTOOL_RX_COPYBREAK]  = "rx-copybreak",
 127         [ETHTOOL_TX_COPYBREAK]  = "tx-copybreak",
 128         [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
 129 };
 130
 131 static const char
 132 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 133         [ETHTOOL_ID_UNSPEC]     = "Unspec",
 134         [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
 135         [ETHTOOL_PHY_FAST_LINK_DOWN] = "phy-fast-link-down",
 136         [ETHTOOL_PHY_EDPD]      = "phy-energy-detect-power-down",
 137 };
 138
 139 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 140 {
 141         struct ethtool_gfeatures cmd = {
 142                 .cmd = ETHTOOL_GFEATURES,
 143                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 144         };
 145         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 146         u32 __user *sizeaddr;
 147         u32 copy_size;
 148         int i;
 149
 150         /* in case feature bits run out again */
 151         BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
 152
 153         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 154                 features[i].available = (u32)(dev->hw_features >> (32 * i));
 155                 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
 156                 features[i].active = (u32)(dev->features >> (32 * i));
 157                 features[i].never_changed =
 158                         (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
 159         }
 160
 161         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 162         if (get_user(copy_size, sizeaddr))
 163                 return -EFAULT;
 164
 165         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 166                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 167
 168         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 169                 return -EFAULT;
 170         useraddr += sizeof(cmd);
 171         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 172                 return -EFAULT;
 173
 174         return 0;
 175 }
 176
 177 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 178 {
 179         struct ethtool_sfeatures cmd;
 180         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 181         netdev_features_t wanted = 0, valid = 0;
 182         int i, ret = 0;
 183
 184         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 185                 return -EFAULT;
 186         useraddr += sizeof(cmd);
 187
 188         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 189                 return -EINVAL;
 190
 191         if (copy_from_user(features, useraddr, sizeof(features)))
 192                 return -EFAULT;
 193
 194         for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
 195                 valid |= (netdev_features_t)features[i].valid << (32 * i);
 196                 wanted |= (netdev_features_t)features[i].requested << (32 * i);
 197         }
 198
 199         if (valid & ~NETIF_F_ETHTOOL_BITS)
 200                 return -EINVAL;
 201
 202         if (valid & ~dev->hw_features) {
 203                 valid &= dev->hw_features;
 204                 ret |= ETHTOOL_F_UNSUPPORTED;
 205         }
 206
 207         dev->wanted_features &= ~valid;
 208         dev->wanted_features |= wanted & valid;
 209         __netdev_update_features(dev);
 210
 211         if ((dev->wanted_features ^ dev->features) & valid)
 212                 ret |= ETHTOOL_F_WISH;
 213
 214         return ret;
 215 }
 216
 217 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 218 {
 219         const struct ethtool_ops *ops = dev->ethtool_ops;
 220
 221         if (sset == ETH_SS_FEATURES)
 222                 return ARRAY_SIZE(netdev_features_strings);
 223
 224         if (sset == ETH_SS_RSS_HASH_FUNCS)
 225                 return ARRAY_SIZE(rss_hash_func_strings);
 226
 227         if (sset == ETH_SS_TUNABLES)
 228                 return ARRAY_SIZE(tunable_strings);
 229
 230         if (sset == ETH_SS_PHY_TUNABLES)
 231                 return ARRAY_SIZE(phy_tunable_strings);
 232
 233         if (sset == ETH_SS_PHY_STATS && dev->phydev &&
 234             !ops->get_ethtool_phy_stats)
 235                 return phy_ethtool_get_sset_count(dev->phydev);
 236
 237         if (ops->get_sset_count && ops->get_strings)
 238                 return ops->get_sset_count(dev, sset);
 239         else
 240                 return -EOPNOTSUPP;
 241 }
 242
 243 static void __ethtool_get_strings(struct net_device *dev,
 244         u32 stringset, u8 *data)
 245 {
 246         const struct ethtool_ops *ops = dev->ethtool_ops;
 247
 248         if (stringset == ETH_SS_FEATURES)
 249                 memcpy(data, netdev_features_strings,
 250                         sizeof(netdev_features_strings));
 251         else if (stringset == ETH_SS_RSS_HASH_FUNCS)
 252                 memcpy(data, rss_hash_func_strings,
 253                        sizeof(rss_hash_func_strings));
 254         else if (stringset == ETH_SS_TUNABLES)
 255                 memcpy(data, tunable_strings, sizeof(tunable_strings));
 256         else if (stringset == ETH_SS_PHY_TUNABLES)
 257                 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
 258         else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
 259                  !ops->get_ethtool_phy_stats)
 260                 phy_ethtool_get_strings(dev->phydev, data);
 261         else
 262                 /* ops->get_strings is valid because checked earlier */
 263                 ops->get_strings(dev, stringset, data);
 264 }
 265
 266 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
 267 {
 268         /* feature masks of legacy discrete ethtool ops */
 269
 270         switch (eth_cmd) {
 271         case ETHTOOL_GTXCSUM:
 272         case ETHTOOL_STXCSUM:
 273                 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
 274         case ETHTOOL_GRXCSUM:
 275         case ETHTOOL_SRXCSUM:
 276                 return NETIF_F_RXCSUM;
 277         case ETHTOOL_GSG:
 278         case ETHTOOL_SSG:
 279                 return NETIF_F_SG;
 280         case ETHTOOL_GTSO:
 281         case ETHTOOL_STSO:
 282                 return NETIF_F_ALL_TSO;
 283         case ETHTOOL_GGSO:
 284         case ETHTOOL_SGSO:
 285                 return NETIF_F_GSO;
 286         case ETHTOOL_GGRO:
 287         case ETHTOOL_SGRO:
 288                 return NETIF_F_GRO;
 289         default:
 290                 BUG();
 291         }
 292 }
 293
 294 static int ethtool_get_one_feature(struct net_device *dev,
 295         char __user *useraddr, u32 ethcmd)
 296 {
 297         netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
 298         struct ethtool_value edata = {
 299                 .cmd = ethcmd,
 300                 .data = !!(dev->features & mask),
 301         };
 302
 303         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 304                 return -EFAULT;
 305         return 0;
 306 }
 307
 308 static int ethtool_set_one_feature(struct net_device *dev,
 309         void __user *useraddr, u32 ethcmd)
 310 {
 311         struct ethtool_value edata;
 312         netdev_features_t mask;
 313
 314         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 315                 return -EFAULT;
 316
 317         mask = ethtool_get_feature_mask(ethcmd);
 318         mask &= dev->hw_features;
 319         if (!mask)
 320                 return -EOPNOTSUPP;
 321
 322         if (edata.data)
 323                 dev->wanted_features |= mask;
 324         else
 325                 dev->wanted_features &= ~mask;
 326
 327         __netdev_update_features(dev);
 328
 329         return 0;
 330 }
 331
 332 #define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
 333                           ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
 334 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
 335                           NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
 336                           NETIF_F_RXHASH)
 337
 338 static u32 __ethtool_get_flags(struct net_device *dev)
 339 {
 340         u32 flags = 0;
 341
 342         if (dev->features & NETIF_F_LRO)
 343                 flags |= ETH_FLAG_LRO;
 344         if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
 345                 flags |= ETH_FLAG_RXVLAN;
 346         if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
 347                 flags |= ETH_FLAG_TXVLAN;
 348         if (dev->features & NETIF_F_NTUPLE)
 349                 flags |= ETH_FLAG_NTUPLE;
 350         if (dev->features & NETIF_F_RXHASH)
 351                 flags |= ETH_FLAG_RXHASH;
 352
 353         return flags;
 354 }
 355
 356 static int __ethtool_set_flags(struct net_device *dev, u32 data)
 357 {
 358         netdev_features_t features = 0, changed;
 359
 360         if (data & ~ETH_ALL_FLAGS)
 361                 return -EINVAL;
 362
 363         if (data & ETH_FLAG_LRO)
 364                 features |= NETIF_F_LRO;
 365         if (data & ETH_FLAG_RXVLAN)
 366                 features |= NETIF_F_HW_VLAN_CTAG_RX;
 367         if (data & ETH_FLAG_TXVLAN)
 368                 features |= NETIF_F_HW_VLAN_CTAG_TX;
 369         if (data & ETH_FLAG_NTUPLE)
 370                 features |= NETIF_F_NTUPLE;
 371         if (data & ETH_FLAG_RXHASH)
 372                 features |= NETIF_F_RXHASH;
 373
 374         /* allow changing only bits set in hw_features */
 375         changed = (features ^ dev->features) & ETH_ALL_FEATURES;
 376         if (changed & ~dev->hw_features)
 377                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 378
 379         dev->wanted_features =
 380                 (dev->wanted_features & ~changed) | (features & changed);
 381
 382         __netdev_update_features(dev);
 383
 384         return 0;
 385 }
 386
 387 /* Given two link masks, AND them together and save the result in dst. */
 388 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
 389                                   struct ethtool_link_ksettings *src)
 390 {
 391         unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
 392         unsigned int idx = 0;
 393
 394         for (; idx < size; idx++) {
 395                 dst->link_modes.supported[idx] &=
 396                         src->link_modes.supported[idx];
 397                 dst->link_modes.advertising[idx] &=
 398                         src->link_modes.advertising[idx];
 399         }
 400 }
 401 EXPORT_SYMBOL(ethtool_intersect_link_masks);
 402
 403 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
 404                                              u32 legacy_u32)
 405 {
 406         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
 407         dst[0] = legacy_u32;
 408 }
 409 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
 410
 411 /* return false if src had higher bits set. lower bits always updated. */
 412 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
 413                                              const unsigned long *src)
 414 {
 415         bool retval = true;
 416
 417         /* TODO: following test will soon always be true */
 418         if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
 419                 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
 420
 421                 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 422                 bitmap_fill(ext, 32);
 423                 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
 424                 if (bitmap_intersects(ext, src,
 425                                       __ETHTOOL_LINK_MODE_MASK_NBITS)) {
 426                         /* src mask goes beyond bit 31 */
 427                         retval = false;
 428                 }
 429         }
 430         *legacy_u32 = src[0];
 431         return retval;
 432 }
 433 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
 434
 435 /* return false if legacy contained non-0 deprecated fields
 436  * maxtxpkt/maxrxpkt. rest of ksettings always updated
 437  */
 438 static bool
 439 convert_legacy_settings_to_link_ksettings(
 440         struct ethtool_link_ksettings *link_ksettings,
 441         const struct ethtool_cmd *legacy_settings)
 442 {
 443         bool retval = true;
 444
 445         memset(link_ksettings, 0, sizeof(*link_ksettings));
 446
 447         /* This is used to tell users that driver is still using these
 448          * deprecated legacy fields, and they should not use
 449          * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
 450          */
 451         if (legacy_settings->maxtxpkt ||
 452             legacy_settings->maxrxpkt)
 453                 retval = false;
 454
 455         ethtool_convert_legacy_u32_to_link_mode(
 456                 link_ksettings->link_modes.supported,
 457                 legacy_settings->supported);
 458         ethtool_convert_legacy_u32_to_link_mode(
 459                 link_ksettings->link_modes.advertising,
 460                 legacy_settings->advertising);
 461         ethtool_convert_legacy_u32_to_link_mode(
 462                 link_ksettings->link_modes.lp_advertising,
 463                 legacy_settings->lp_advertising);
 464         link_ksettings->base.speed
 465                 = ethtool_cmd_speed(legacy_settings);
 466         link_ksettings->base.duplex
 467                 = legacy_settings->duplex;
 468         link_ksettings->base.port
 469                 = legacy_settings->port;
 470         link_ksettings->base.phy_address
 471                 = legacy_settings->phy_address;
 472         link_ksettings->base.autoneg
 473                 = legacy_settings->autoneg;
 474         link_ksettings->base.mdio_support
 475                 = legacy_settings->mdio_support;
 476         link_ksettings->base.eth_tp_mdix
 477                 = legacy_settings->eth_tp_mdix;
 478         link_ksettings->base.eth_tp_mdix_ctrl
 479                 = legacy_settings->eth_tp_mdix_ctrl;
 480         return retval;
 481 }
 482
 483 /* return false if ksettings link modes had higher bits
 484  * set. legacy_settings always updated (best effort)
 485  */
 486 static bool
 487 convert_link_ksettings_to_legacy_settings(
 488         struct ethtool_cmd *legacy_settings,
 489         const struct ethtool_link_ksettings *link_ksettings)
 490 {
 491         bool retval = true;
 492
 493         memset(legacy_settings, 0, sizeof(*legacy_settings));
 494         /* this also clears the deprecated fields in legacy structure:
 495          * __u8         transceiver;
 496          * __u32        maxtxpkt;
 497          * __u32        maxrxpkt;
 498          */
 499
 500         retval &= ethtool_convert_link_mode_to_legacy_u32(
 501                 &legacy_settings->supported,
 502                 link_ksettings->link_modes.supported);
 503         retval &= ethtool_convert_link_mode_to_legacy_u32(
 504                 &legacy_settings->advertising,
 505                 link_ksettings->link_modes.advertising);
 506         retval &= ethtool_convert_link_mode_to_legacy_u32(
 507                 &legacy_settings->lp_advertising,
 508                 link_ksettings->link_modes.lp_advertising);
 509         ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
 510         legacy_settings->duplex
 511                 = link_ksettings->base.duplex;
 512         legacy_settings->port
 513                 = link_ksettings->base.port;
 514         legacy_settings->phy_address
 515                 = link_ksettings->base.phy_address;
 516         legacy_settings->autoneg
 517                 = link_ksettings->base.autoneg;
 518         legacy_settings->mdio_support
 519                 = link_ksettings->base.mdio_support;
 520         legacy_settings->eth_tp_mdix
 521                 = link_ksettings->base.eth_tp_mdix;
 522         legacy_settings->eth_tp_mdix_ctrl
 523                 = link_ksettings->base.eth_tp_mdix_ctrl;
 524         legacy_settings->transceiver
 525                 = link_ksettings->base.transceiver;
 526         return retval;
 527 }
 528
 529 /* number of 32-bit words to store the user's link mode bitmaps */
 530 #define __ETHTOOL_LINK_MODE_MASK_NU32                   \
 531         DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
 532
 533 /* layout of the struct passed from/to userland */
 534 struct ethtool_link_usettings {
 535         struct ethtool_link_settings base;
 536         struct {
 537                 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
 538                 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 539                 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
 540         } link_modes;
 541 };
 542
 543 /* Internal kernel helper to query a device ethtool_link_settings. */
 544 int __ethtool_get_link_ksettings(struct net_device *dev,
 545                                  struct ethtool_link_ksettings *link_ksettings)
 546 {
 547         ASSERT_RTNL();
 548
 549         if (!dev->ethtool_ops->get_link_ksettings)
 550                 return -EOPNOTSUPP;
 551
 552         memset(link_ksettings, 0, sizeof(*link_ksettings));
 553         return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
 554 }
 555 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
 556
 557 /* convert ethtool_link_usettings in user space to a kernel internal
 558  * ethtool_link_ksettings. return 0 on success, errno on error.
 559  */
 560 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
 561                                          const void __user *from)
 562 {
 563         struct ethtool_link_usettings link_usettings;
 564
 565         if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
 566                 return -EFAULT;
 567
 568         memcpy(&to->base, &link_usettings.base, sizeof(to->base));
 569         bitmap_from_arr32(to->link_modes.supported,
 570                           link_usettings.link_modes.supported,
 571                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 572         bitmap_from_arr32(to->link_modes.advertising,
 573                           link_usettings.link_modes.advertising,
 574                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 575         bitmap_from_arr32(to->link_modes.lp_advertising,
 576                           link_usettings.link_modes.lp_advertising,
 577                           __ETHTOOL_LINK_MODE_MASK_NBITS);
 578
 579         return 0;
 580 }
 581
 582 /* convert a kernel internal ethtool_link_ksettings to
 583  * ethtool_link_usettings in user space. return 0 on success, errno on
 584  * error.
 585  */
 586 static int
 587 store_link_ksettings_for_user(void __user *to,
 588                               const struct ethtool_link_ksettings *from)
 589 {
 590         struct ethtool_link_usettings link_usettings;
 591
 592         memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
 593         bitmap_to_arr32(link_usettings.link_modes.supported,
 594                         from->link_modes.supported,
 595                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 596         bitmap_to_arr32(link_usettings.link_modes.advertising,
 597                         from->link_modes.advertising,
 598                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 599         bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
 600                         from->link_modes.lp_advertising,
 601                         __ETHTOOL_LINK_MODE_MASK_NBITS);
 602
 603         if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
 604                 return -EFAULT;
 605
 606         return 0;
 607 }
 608
 609 /* Query device for its ethtool_link_settings. */
 610 static int ethtool_get_link_ksettings(struct net_device *dev,
 611                                       void __user *useraddr)
 612 {
 613         int err = 0;
 614         struct ethtool_link_ksettings link_ksettings;
 615
 616         ASSERT_RTNL();
 617         if (!dev->ethtool_ops->get_link_ksettings)
 618                 return -EOPNOTSUPP;
 619
 620         /* handle bitmap nbits handshake */
 621         if (copy_from_user(&link_ksettings.base, useraddr,
 622                            sizeof(link_ksettings.base)))
 623                 return -EFAULT;
 624
 625         if (__ETHTOOL_LINK_MODE_MASK_NU32
 626             != link_ksettings.base.link_mode_masks_nwords) {
 627                 /* wrong link mode nbits requested */
 628                 memset(&link_ksettings, 0, sizeof(link_ksettings));
 629                 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 630                 /* send back number of words required as negative val */
 631                 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
 632                                    "need too many bits for link modes!");
 633                 link_ksettings.base.link_mode_masks_nwords
 634                         = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
 635
 636                 /* copy the base fields back to user, not the link
 637                  * mode bitmaps
 638                  */
 639                 if (copy_to_user(useraddr, &link_ksettings.base,
 640                                  sizeof(link_ksettings.base)))
 641                         return -EFAULT;
 642
 643                 return 0;
 644         }
 645
 646         /* handshake successful: user/kernel agree on
 647          * link_mode_masks_nwords
 648          */
 649
 650         memset(&link_ksettings, 0, sizeof(link_ksettings));
 651         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 652         if (err < 0)
 653                 return err;
 654
 655         /* make sure we tell the right values to user */
 656         link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
 657         link_ksettings.base.link_mode_masks_nwords
 658                 = __ETHTOOL_LINK_MODE_MASK_NU32;
 659
 660         return store_link_ksettings_for_user(useraddr, &link_ksettings);
 661 }
 662
 663 /* Update device ethtool_link_settings. */
 664 static int ethtool_set_link_ksettings(struct net_device *dev,
 665                                       void __user *useraddr)
 666 {
 667         int err;
 668         struct ethtool_link_ksettings link_ksettings;
 669
 670         ASSERT_RTNL();
 671
 672         if (!dev->ethtool_ops->set_link_ksettings)
 673                 return -EOPNOTSUPP;
 674
 675         /* make sure nbits field has expected value */
 676         if (copy_from_user(&link_ksettings.base, useraddr,
 677                            sizeof(link_ksettings.base)))
 678                 return -EFAULT;
 679
 680         if (__ETHTOOL_LINK_MODE_MASK_NU32
 681             != link_ksettings.base.link_mode_masks_nwords)
 682                 return -EINVAL;
 683
 684         /* copy the whole structure, now that we know it has expected
 685          * format
 686          */
 687         err = load_link_ksettings_from_user(&link_ksettings, useraddr);
 688         if (err)
 689                 return err;
 690
 691         /* re-check nwords field, just in case */
 692         if (__ETHTOOL_LINK_MODE_MASK_NU32
 693             != link_ksettings.base.link_mode_masks_nwords)
 694                 return -EINVAL;
 695
 696         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 697 }
 698
 699 /* Query device for its ethtool_cmd settings.
 700  *
 701  * Backward compatibility note: for compatibility with legacy ethtool, this is
 702  * now implemented via get_link_ksettings. When driver reports higher link mode
 703  * bits, a kernel warning is logged once (with name of 1st driver/device) to
 704  * recommend user to upgrade ethtool, but the command is successful (only the
 705  * lower link mode bits reported back to user). Deprecated fields from
 706  * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 707  */
 708 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 709 {
 710         struct ethtool_link_ksettings link_ksettings;
 711         struct ethtool_cmd cmd;
 712         int err;
 713
 714         ASSERT_RTNL();
 715         if (!dev->ethtool_ops->get_link_ksettings)
 716                 return -EOPNOTSUPP;
 717
 718         memset(&link_ksettings, 0, sizeof(link_ksettings));
 719         err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
 720         if (err < 0)
 721                 return err;
 722         convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
 723
 724         /* send a sensible cmd tag back to user */
 725         cmd.cmd = ETHTOOL_GSET;
 726
 727         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 728                 return -EFAULT;
 729
 730         return 0;
 731 }
 732
 733 /* Update device link settings with given ethtool_cmd.
 734  *
 735  * Backward compatibility note: for compatibility with legacy ethtool, this is
 736  * now always implemented via set_link_settings. When user's request updates
 737  * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 738  * warning is logged once (with name of 1st driver/device) to recommend user to
 739  * upgrade ethtool, and the request is rejected.
 740  */
 741 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 742 {
 743         struct ethtool_link_ksettings link_ksettings;
 744         struct ethtool_cmd cmd;
 745
 746         ASSERT_RTNL();
 747
 748         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 749                 return -EFAULT;
 750         if (!dev->ethtool_ops->set_link_ksettings)
 751                 return -EOPNOTSUPP;
 752
 753         if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
 754                 return -EINVAL;
 755         link_ksettings.base.link_mode_masks_nwords =
 756                 __ETHTOOL_LINK_MODE_MASK_NU32;
 757         return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
 758 }
 759
 760 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 761                                                   void __user *useraddr)
 762 {
 763         struct ethtool_drvinfo info;
 764         const struct ethtool_ops *ops = dev->ethtool_ops;
 765
 766         memset(&info, 0, sizeof(info));
 767         info.cmd = ETHTOOL_GDRVINFO;
 768         if (ops->get_drvinfo) {
 769                 ops->get_drvinfo(dev, &info);
 770         } else if (dev->dev.parent && dev->dev.parent->driver) {
 771                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 772                         sizeof(info.bus_info));
 773                 strlcpy(info.driver, dev->dev.parent->driver->name,
 774                         sizeof(info.driver));
 775         } else {
 776                 return -EOPNOTSUPP;
 777         }
 778
 779         /*
 780          * this method of obtaining string set info is deprecated;
 781          * Use ETHTOOL_GSSET_INFO instead.
 782          */
 783         if (ops->get_sset_count) {
 784                 int rc;
 785
 786                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 787                 if (rc >= 0)
 788                         info.testinfo_len = rc;
 789                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 790                 if (rc >= 0)
 791                         info.n_stats = rc;
 792                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 793                 if (rc >= 0)
 794                         info.n_priv_flags = rc;
 795         }
 796         if (ops->get_regs_len) {
 797                 int ret = ops->get_regs_len(dev);
 798
 799                 if (ret > 0)
 800                         info.regdump_len = ret;
 801         }
 802
 803         if (ops->get_eeprom_len)
 804                 info.eedump_len = ops->get_eeprom_len(dev);
 805
 806         if (!info.fw_version[0])
 807                 devlink_compat_running_version(dev, info.fw_version,
 808                                                sizeof(info.fw_version));
 809
 810         if (copy_to_user(useraddr, &info, sizeof(info)))
 811                 return -EFAULT;
 812         return 0;
 813 }
 814
 815 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 816                                                     void __user *useraddr)
 817 {
 818         struct ethtool_sset_info info;
 819         u64 sset_mask;
 820         int i, idx = 0, n_bits = 0, ret, rc;
 821         u32 *info_buf = NULL;
 822
 823         if (copy_from_user(&info, useraddr, sizeof(info)))
 824                 return -EFAULT;
 825
 826         /* store copy of mask, because we zero struct later on */
 827         sset_mask = info.sset_mask;
 828         if (!sset_mask)
 829                 return 0;
 830
 831         /* calculate size of return buffer */
 832         n_bits = hweight64(sset_mask);
 833
 834         memset(&info, 0, sizeof(info));
 835         info.cmd = ETHTOOL_GSSET_INFO;
 836
 837         info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
 838         if (!info_buf)
 839                 return -ENOMEM;
 840
 841         /*
 842          * fill return buffer based on input bitmask and successful
 843          * get_sset_count return
 844          */
 845         for (i = 0; i < 64; i++) {
 846                 if (!(sset_mask & (1ULL << i)))
 847                         continue;
 848
 849                 rc = __ethtool_get_sset_count(dev, i);
 850                 if (rc >= 0) {
 851                         info.sset_mask |= (1ULL << i);
 852                         info_buf[idx++] = rc;
 853                 }
 854         }
 855
 856         ret = -EFAULT;
 857         if (copy_to_user(useraddr, &info, sizeof(info)))
 858                 goto out;
 859
 860         useraddr += offsetof(struct ethtool_sset_info, data);
 861         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 862                 goto out;
 863
 864         ret = 0;
 865
 866 out:
 867         kfree(info_buf);
 868         return ret;
 869 }
 870
 871 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 872                                                 u32 cmd, void __user *useraddr)
 873 {
 874         struct ethtool_rxnfc info;
 875         size_t info_size = sizeof(info);
 876         int rc;
 877
 878         if (!dev->ethtool_ops->set_rxnfc)
 879                 return -EOPNOTSUPP;
 880
 881         /* struct ethtool_rxnfc was originally defined for
 882          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 883          * members.  User-space might still be using that
 884          * definition. */
 885         if (cmd == ETHTOOL_SRXFH)
 886                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 887                              sizeof(info.data));
 888
 889         if (copy_from_user(&info, useraddr, info_size))
 890                 return -EFAULT;
 891
 892         rc = dev->ethtool_ops->set_rxnfc(dev, &info);
 893         if (rc)
 894                 return rc;
 895
 896         if (cmd == ETHTOOL_SRXCLSRLINS &&
 897             copy_to_user(useraddr, &info, info_size))
 898                 return -EFAULT;
 899
 900         return 0;
 901 }
 902
 903 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 904                                                 u32 cmd, void __user *useraddr)
 905 {
 906         struct ethtool_rxnfc info;
 907         size_t info_size = sizeof(info);
 908         const struct ethtool_ops *ops = dev->ethtool_ops;
 909         int ret;
 910         void *rule_buf = NULL;
 911
 912         if (!ops->get_rxnfc)
 913                 return -EOPNOTSUPP;
 914
 915         /* struct ethtool_rxnfc was originally defined for
 916          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 917          * members.  User-space might still be using that
 918          * definition. */
 919         if (cmd == ETHTOOL_GRXFH)
 920                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 921                              sizeof(info.data));
 922
 923         if (copy_from_user(&info, useraddr, info_size))
 924                 return -EFAULT;
 925
 926         /* If FLOW_RSS was requested then user-space must be using the
 927          * new definition, as FLOW_RSS is newer.
 928          */
 929         if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
 930                 info_size = sizeof(info);
 931                 if (copy_from_user(&info, useraddr, info_size))
 932                         return -EFAULT;
 933                 /* Since malicious users may modify the original data,
 934                  * we need to check whether FLOW_RSS is still requested.
 935                  */
 936                 if (!(info.flow_type & FLOW_RSS))
 937                         return -EINVAL;
 938         }
 939
 940         if (info.cmd != cmd)
 941                 return -EINVAL;
 942
 943         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 944                 if (info.rule_cnt > 0) {
 945                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
 946                                 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
 947                                                    GFP_USER);
 948                         if (!rule_buf)
 949                                 return -ENOMEM;
 950                 }
 951         }
 952
 953         ret = ops->get_rxnfc(dev, &info, rule_buf);
 954         if (ret < 0)
 955                 goto err_out;
 956
 957         ret = -EFAULT;
 958         if (copy_to_user(useraddr, &info, info_size))
 959                 goto err_out;
 960
 961         if (rule_buf) {
 962                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 963                 if (copy_to_user(useraddr, rule_buf,
 964                                  info.rule_cnt * sizeof(u32)))
 965                         goto err_out;
 966         }
 967         ret = 0;
 968
 969 err_out:
 970         kfree(rule_buf);
 971
 972         return ret;
 973 }
 974
 975 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
 976                                         struct ethtool_rxnfc *rx_rings,
 977                                         u32 size)
 978 {
 979         int i;
 980
 981         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
 982                 return -EFAULT;
 983
 984         /* Validate ring indices */
 985         for (i = 0; i < size; i++)
 986                 if (indir[i] >= rx_rings->data)
 987                         return -EINVAL;
 988
 989         return 0;
 990 }
 991
 992 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
 993
 994 void netdev_rss_key_fill(void *buffer, size_t len)
 995 {
 996         BUG_ON(len > sizeof(netdev_rss_key));
 997         net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
 998         memcpy(buffer, netdev_rss_key, len);
 999 }
1000 EXPORT_SYMBOL(netdev_rss_key_fill);
1001
1002 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1003 {
1004         u32 dev_size, current_max = 0;
1005         u32 *indir;
1006         int ret;
1007
1008         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1009             !dev->ethtool_ops->get_rxfh)
1010                 return -EOPNOTSUPP;
1011         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1012         if (dev_size == 0)
1013                 return -EOPNOTSUPP;
1014
1015         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1016         if (!indir)
1017                 return -ENOMEM;
1018
1019         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1020         if (ret)
1021                 goto out;
1022
1023         while (dev_size--)
1024                 current_max = max(current_max, indir[dev_size]);
1025
1026         *max = current_max;
1027
1028 out:
1029         kfree(indir);
1030         return ret;
1031 }
1032
1033 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1034                                                      void __user *useraddr)
1035 {
1036         u32 user_size, dev_size;
1037         u32 *indir;
1038         int ret;
1039
1040         if (!dev->ethtool_ops->get_rxfh_indir_size ||
1041             !dev->ethtool_ops->get_rxfh)
1042                 return -EOPNOTSUPP;
1043         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1044         if (dev_size == 0)
1045                 return -EOPNOTSUPP;
1046
1047         if (copy_from_user(&user_size,
1048                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1049                            sizeof(user_size)))
1050                 return -EFAULT;
1051
1052         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1053                          &dev_size, sizeof(dev_size)))
1054                 return -EFAULT;
1055
1056         /* If the user buffer size is 0, this is just a query for the
1057          * device table size.  Otherwise, if it's smaller than the
1058          * device table size it's an error.
1059          */
1060         if (user_size < dev_size)
1061                 return user_size == 0 ? 0 : -EINVAL;
1062
1063         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1064         if (!indir)
1065                 return -ENOMEM;
1066
1067         ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1068         if (ret)
1069                 goto out;
1070
1071         if (copy_to_user(useraddr +
1072                          offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1073                          indir, dev_size * sizeof(indir[0])))
1074                 ret = -EFAULT;
1075
1076 out:
1077         kfree(indir);
1078         return ret;
1079 }
1080
1081 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1082                                                      void __user *useraddr)
1083 {
1084         struct ethtool_rxnfc rx_rings;
1085         u32 user_size, dev_size, i;
1086         u32 *indir;
1087         const struct ethtool_ops *ops = dev->ethtool_ops;
1088         int ret;
1089         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1090
1091         if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1092             !ops->get_rxnfc)
1093                 return -EOPNOTSUPP;
1094
1095         dev_size = ops->get_rxfh_indir_size(dev);
1096         if (dev_size == 0)
1097                 return -EOPNOTSUPP;
1098
1099         if (copy_from_user(&user_size,
1100                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
1101                            sizeof(user_size)))
1102                 return -EFAULT;
1103
1104         if (user_size != 0 && user_size != dev_size)
1105                 return -EINVAL;
1106
1107         indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1108         if (!indir)
1109                 return -ENOMEM;
1110
1111         rx_rings.cmd = ETHTOOL_GRXRINGS;
1112         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1113         if (ret)
1114                 goto out;
1115
1116         if (user_size == 0) {
1117                 for (i = 0; i < dev_size; i++)
1118                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1119         } else {
1120                 ret = ethtool_copy_validate_indir(indir,
1121                                                   useraddr + ringidx_offset,
1122                                                   &rx_rings,
1123                                                   dev_size);
1124                 if (ret)
1125                         goto out;
1126         }
1127
1128         ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1129         if (ret)
1130                 goto out;
1131
1132         /* indicate whether rxfh was set to default */
1133         if (user_size == 0)
1134                 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1135         else
1136                 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1137
1138 out:
1139         kfree(indir);
1140         return ret;
1141 }
1142
1143 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1144                                                void __user *useraddr)
1145 {
1146         int ret;
1147         const struct ethtool_ops *ops = dev->ethtool_ops;
1148         u32 user_indir_size, user_key_size;
1149         u32 dev_indir_size = 0, dev_key_size = 0;
1150         struct ethtool_rxfh rxfh;
1151         u32 total_size;
1152         u32 indir_bytes;
1153         u32 *indir = NULL;
1154         u8 dev_hfunc = 0;
1155         u8 *hkey = NULL;
1156         u8 *rss_config;
1157
1158         if (!ops->get_rxfh)
1159                 return -EOPNOTSUPP;
1160
1161         if (ops->get_rxfh_indir_size)
1162                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1163         if (ops->get_rxfh_key_size)
1164                 dev_key_size = ops->get_rxfh_key_size(dev);
1165
1166         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1167                 return -EFAULT;
1168         user_indir_size = rxfh.indir_size;
1169         user_key_size = rxfh.key_size;
1170
1171         /* Check that reserved fields are 0 for now */
1172         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1173                 return -EINVAL;
1174         /* Most drivers don't handle rss_context, check it's 0 as well */
1175         if (rxfh.rss_context && !ops->get_rxfh_context)
1176                 return -EOPNOTSUPP;
1177
1178         rxfh.indir_size = dev_indir_size;
1179         rxfh.key_size = dev_key_size;
1180         if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1181                 return -EFAULT;
1182
1183         if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1184             (user_key_size && (user_key_size != dev_key_size)))
1185                 return -EINVAL;
1186
1187         indir_bytes = user_indir_size * sizeof(indir[0]);
1188         total_size = indir_bytes + user_key_size;
1189         rss_config = kzalloc(total_size, GFP_USER);
1190         if (!rss_config)
1191                 return -ENOMEM;
1192
1193         if (user_indir_size)
1194                 indir = (u32 *)rss_config;
1195
1196         if (user_key_size)
1197                 hkey = rss_config + indir_bytes;
1198
1199         if (rxfh.rss_context)
1200                 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1201                                                          &dev_hfunc,
1202                                                          rxfh.rss_context);
1203         else
1204                 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1205         if (ret)
1206                 goto out;
1207
1208         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1209                          &dev_hfunc, sizeof(rxfh.hfunc))) {
1210                 ret = -EFAULT;
1211         } else if (copy_to_user(useraddr +
1212                               offsetof(struct ethtool_rxfh, rss_config[0]),
1213                               rss_config, total_size)) {
1214                 ret = -EFAULT;
1215         }
1216 out:
1217         kfree(rss_config);
1218
1219         return ret;
1220 }
1221
1222 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1223                                                void __user *useraddr)
1224 {
1225         int ret;
1226         const struct ethtool_ops *ops = dev->ethtool_ops;
1227         struct ethtool_rxnfc rx_rings;
1228         struct ethtool_rxfh rxfh;
1229         u32 dev_indir_size = 0, dev_key_size = 0, i;
1230         u32 *indir = NULL, indir_bytes = 0;
1231         u8 *hkey = NULL;
1232         u8 *rss_config;
1233         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1234         bool delete = false;
1235
1236         if (!ops->get_rxnfc || !ops->set_rxfh)
1237                 return -EOPNOTSUPP;
1238
1239         if (ops->get_rxfh_indir_size)
1240                 dev_indir_size = ops->get_rxfh_indir_size(dev);
1241         if (ops->get_rxfh_key_size)
1242                 dev_key_size = ops->get_rxfh_key_size(dev);
1243
1244         if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1245                 return -EFAULT;
1246
1247         /* Check that reserved fields are 0 for now */
1248         if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1249                 return -EINVAL;
1250         /* Most drivers don't handle rss_context, check it's 0 as well */
1251         if (rxfh.rss_context && !ops->set_rxfh_context)
1252                 return -EOPNOTSUPP;
1253
1254         /* If either indir, hash key or function is valid, proceed further.
1255          * Must request at least one change: indir size, hash key or function.
1256          */
1257         if ((rxfh.indir_size &&
1258              rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1259              rxfh.indir_size != dev_indir_size) ||
1260             (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1261             (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1262              rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1263                 return -EINVAL;
1264
1265         if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1266                 indir_bytes = dev_indir_size * sizeof(indir[0]);
1267
1268         rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1269         if (!rss_config)
1270                 return -ENOMEM;
1271
1272         rx_rings.cmd = ETHTOOL_GRXRINGS;
1273         ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1274         if (ret)
1275                 goto out;
1276
1277         /* rxfh.indir_size == 0 means reset the indir table to default (master
1278          * context) or delete the context (other RSS contexts).
1279          * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1280          */
1281         if (rxfh.indir_size &&
1282             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1283                 indir = (u32 *)rss_config;
1284                 ret = ethtool_copy_validate_indir(indir,
1285                                                   useraddr + rss_cfg_offset,
1286                                                   &rx_rings,
1287                                                   rxfh.indir_size);
1288                 if (ret)
1289                         goto out;
1290         } else if (rxfh.indir_size == 0) {
1291                 if (rxfh.rss_context == 0) {
1292                         indir = (u32 *)rss_config;
1293                         for (i = 0; i < dev_indir_size; i++)
1294                                 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1295                 } else {
1296                         delete = true;
1297                 }
1298         }
1299
1300         if (rxfh.key_size) {
1301                 hkey = rss_config + indir_bytes;
1302                 if (copy_from_user(hkey,
1303                                    useraddr + rss_cfg_offset + indir_bytes,
1304                                    rxfh.key_size)) {
1305                         ret = -EFAULT;
1306                         goto out;
1307                 }
1308         }
1309
1310         if (rxfh.rss_context)
1311                 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1312                                             &rxfh.rss_context, delete);
1313         else
1314                 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1315         if (ret)
1316                 goto out;
1317
1318         if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1319                          &rxfh.rss_context, sizeof(rxfh.rss_context)))
1320                 ret = -EFAULT;
1321
1322         if (!rxfh.rss_context) {
1323                 /* indicate whether rxfh was set to default */
1324                 if (rxfh.indir_size == 0)
1325                         dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1326                 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1327                         dev->priv_flags |= IFF_RXFH_CONFIGURED;
1328         }
1329
1330 out:
1331         kfree(rss_config);
1332         return ret;
1333 }
1334
1335 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1336 {
1337         struct ethtool_regs regs;
1338         const struct ethtool_ops *ops = dev->ethtool_ops;
1339         void *regbuf;
1340         int reglen, ret;
1341
1342         if (!ops->get_regs || !ops->get_regs_len)
1343                 return -EOPNOTSUPP;
1344
1345         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1346                 return -EFAULT;
1347
1348         reglen = ops->get_regs_len(dev);
1349         if (reglen <= 0)
1350                 return reglen;
1351
1352         if (regs.len > reglen)
1353                 regs.len = reglen;
1354
1355         regbuf = vzalloc(reglen);
1356         if (!regbuf)
1357                 return -ENOMEM;
1358
1359         if (regs.len < reglen)
1360                 reglen = regs.len;
1361
1362         ops->get_regs(dev, &regs, regbuf);
1363
1364         ret = -EFAULT;
1365         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1366                 goto out;
1367         useraddr += offsetof(struct ethtool_regs, data);
1368         if (copy_to_user(useraddr, regbuf, reglen))
1369                 goto out;
1370         ret = 0;
1371
1372  out:
1373         vfree(regbuf);
1374         return ret;
1375 }
1376
1377 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1378 {
1379         struct ethtool_value reset;
1380         int ret;
1381
1382         if (!dev->ethtool_ops->reset)
1383                 return -EOPNOTSUPP;
1384
1385         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1386                 return -EFAULT;
1387
1388         ret = dev->ethtool_ops->reset(dev, &reset.data);
1389         if (ret)
1390                 return ret;
1391
1392         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1393                 return -EFAULT;
1394         return 0;
1395 }
1396
1397 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1398 {
1399         struct ethtool_wolinfo wol;
1400
1401         if (!dev->ethtool_ops->get_wol)
1402                 return -EOPNOTSUPP;
1403
1404         memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1405         wol.cmd = ETHTOOL_GWOL;
1406         dev->ethtool_ops->get_wol(dev, &wol);
1407
1408         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1409                 return -EFAULT;
1410         return 0;
1411 }
1412
1413 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1414 {
1415         struct ethtool_wolinfo wol;
1416         int ret;
1417
1418         if (!dev->ethtool_ops->set_wol)
1419                 return -EOPNOTSUPP;
1420
1421         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1422                 return -EFAULT;
1423
1424         ret = dev->ethtool_ops->set_wol(dev, &wol);
1425         if (ret)
1426                 return ret;
1427
1428         dev->wol_enabled = !!wol.wolopts;
1429
1430         return 0;
1431 }
1432
1433 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1434 {
1435         struct ethtool_eee edata;
1436         int rc;
1437
1438         if (!dev->ethtool_ops->get_eee)
1439                 return -EOPNOTSUPP;
1440
1441         memset(&edata, 0, sizeof(struct ethtool_eee));
1442         edata.cmd = ETHTOOL_GEEE;
1443         rc = dev->ethtool_ops->get_eee(dev, &edata);
1444
1445         if (rc)
1446                 return rc;
1447
1448         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1449                 return -EFAULT;
1450
1451         return 0;
1452 }
1453
1454 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1455 {
1456         struct ethtool_eee edata;
1457
1458         if (!dev->ethtool_ops->set_eee)
1459                 return -EOPNOTSUPP;
1460
1461         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1462                 return -EFAULT;
1463
1464         return dev->ethtool_ops->set_eee(dev, &edata);
1465 }
1466
1467 static int ethtool_nway_reset(struct net_device *dev)
1468 {
1469         if (!dev->ethtool_ops->nway_reset)
1470                 return -EOPNOTSUPP;
1471
1472         return dev->ethtool_ops->nway_reset(dev);
1473 }
1474
1475 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1476 {
1477         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1478
1479         if (!dev->ethtool_ops->get_link)
1480                 return -EOPNOTSUPP;
1481
1482         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1483
1484         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1485                 return -EFAULT;
1486         return 0;
1487 }
1488
1489 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1490                                   int (*getter)(struct net_device *,
1491                                                 struct ethtool_eeprom *, u8 *),
1492                                   u32 total_len)
1493 {
1494         struct ethtool_eeprom eeprom;
1495         void __user *userbuf = useraddr + sizeof(eeprom);
1496         u32 bytes_remaining;
1497         u8 *data;
1498         int ret = 0;
1499
1500         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1501                 return -EFAULT;
1502
1503         /* Check for wrap and zero */
1504         if (eeprom.offset + eeprom.len <= eeprom.offset)
1505                 return -EINVAL;
1506
1507         /* Check for exceeding total eeprom len */
1508         if (eeprom.offset + eeprom.len > total_len)
1509                 return -EINVAL;
1510
1511         data = kmalloc(PAGE_SIZE, GFP_USER);
1512         if (!data)
1513                 return -ENOMEM;
1514
1515         bytes_remaining = eeprom.len;
1516         while (bytes_remaining > 0) {
1517                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1518
1519                 ret = getter(dev, &eeprom, data);
1520                 if (ret)
1521                         break;
1522                 if (copy_to_user(userbuf, data, eeprom.len)) {
1523                         ret = -EFAULT;
1524                         break;
1525                 }
1526                 userbuf += eeprom.len;
1527                 eeprom.offset += eeprom.len;
1528                 bytes_remaining -= eeprom.len;
1529         }
1530
1531         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1532         eeprom.offset -= eeprom.len;
1533         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1534                 ret = -EFAULT;
1535
1536         kfree(data);
1537         return ret;
1538 }
1539
1540 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1541 {
1542         const struct ethtool_ops *ops = dev->ethtool_ops;
1543
1544         if (!ops->get_eeprom || !ops->get_eeprom_len ||
1545             !ops->get_eeprom_len(dev))
1546                 return -EOPNOTSUPP;
1547
1548         return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1549                                       ops->get_eeprom_len(dev));
1550 }
1551
1552 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1553 {
1554         struct ethtool_eeprom eeprom;
1555         const struct ethtool_ops *ops = dev->ethtool_ops;
1556         void __user *userbuf = useraddr + sizeof(eeprom);
1557         u32 bytes_remaining;
1558         u8 *data;
1559         int ret = 0;
1560
1561         if (!ops->set_eeprom || !ops->get_eeprom_len ||
1562             !ops->get_eeprom_len(dev))
1563                 return -EOPNOTSUPP;
1564
1565         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1566                 return -EFAULT;
1567
1568         /* Check for wrap and zero */
1569         if (eeprom.offset + eeprom.len <= eeprom.offset)
1570                 return -EINVAL;
1571
1572         /* Check for exceeding total eeprom len */
1573         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1574                 return -EINVAL;
1575
1576         data = kmalloc(PAGE_SIZE, GFP_USER);
1577         if (!data)
1578                 return -ENOMEM;
1579
1580         bytes_remaining = eeprom.len;
1581         while (bytes_remaining > 0) {
1582                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1583
1584                 if (copy_from_user(data, userbuf, eeprom.len)) {
1585                         ret = -EFAULT;
1586                         break;
1587                 }
1588                 ret = ops->set_eeprom(dev, &eeprom, data);
1589                 if (ret)
1590                         break;
1591                 userbuf += eeprom.len;
1592                 eeprom.offset += eeprom.len;
1593                 bytes_remaining -= eeprom.len;
1594         }
1595
1596         kfree(data);
1597         return ret;
1598 }
1599
1600 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1601                                                    void __user *useraddr)
1602 {
1603         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1604
1605         if (!dev->ethtool_ops->get_coalesce)
1606                 return -EOPNOTSUPP;
1607
1608         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1609
1610         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1611                 return -EFAULT;
1612         return 0;
1613 }
1614
1615 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1616                                                    void __user *useraddr)
1617 {
1618         struct ethtool_coalesce coalesce;
1619
1620         if (!dev->ethtool_ops->set_coalesce)
1621                 return -EOPNOTSUPP;
1622
1623         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1624                 return -EFAULT;
1625
1626         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1627 }
1628
1629 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1630 {
1631         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1632
1633         if (!dev->ethtool_ops->get_ringparam)
1634                 return -EOPNOTSUPP;
1635
1636         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1637
1638         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1639                 return -EFAULT;
1640         return 0;
1641 }
1642
1643 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1644 {
1645         struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1646
1647         if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1648                 return -EOPNOTSUPP;
1649
1650         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1651                 return -EFAULT;
1652
1653         dev->ethtool_ops->get_ringparam(dev, &max);
1654
1655         /* ensure new ring parameters are within the maximums */
1656         if (ringparam.rx_pending > max.rx_max_pending ||
1657             ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1658             ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1659             ringparam.tx_pending > max.tx_max_pending)
1660                 return -EINVAL;
1661
1662         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1663 }
1664
1665 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1666                                                    void __user *useraddr)
1667 {
1668         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1669
1670         if (!dev->ethtool_ops->get_channels)
1671                 return -EOPNOTSUPP;
1672
1673         dev->ethtool_ops->get_channels(dev, &channels);
1674
1675         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1676                 return -EFAULT;
1677         return 0;
1678 }
1679
1680 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1681                                                    void __user *useraddr)
1682 {
1683         struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1684         u16 from_channel, to_channel;
1685         u32 max_rx_in_use = 0;
1686         unsigned int i;
1687
1688         if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1689                 return -EOPNOTSUPP;
1690
1691         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1692                 return -EFAULT;
1693
1694         dev->ethtool_ops->get_channels(dev, &curr);
1695
1696         /* ensure new counts are within the maximums */
1697         if (channels.rx_count > curr.max_rx ||
1698             channels.tx_count > curr.max_tx ||
1699             channels.combined_count > curr.max_combined ||
1700             channels.other_count > curr.max_other)
1701                 return -EINVAL;
1702
1703         /* ensure the new Rx count fits within the configured Rx flow
1704          * indirection table settings */
1705         if (netif_is_rxfh_configured(dev) &&
1706             !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1707             (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1708             return -EINVAL;
1709
1710         /* Disabling channels, query zero-copy AF_XDP sockets */
1711         from_channel = channels.combined_count +
1712                 min(channels.rx_count, channels.tx_count);
1713         to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1714         for (i = from_channel; i < to_channel; i++)
1715                 if (xdp_get_umem_from_qid(dev, i))
1716                         return -EINVAL;
1717
1718         return dev->ethtool_ops->set_channels(dev, &channels);
1719 }
1720
1721 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1722 {
1723         struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1724
1725         if (!dev->ethtool_ops->get_pauseparam)
1726                 return -EOPNOTSUPP;
1727
1728         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1729
1730         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1731                 return -EFAULT;
1732         return 0;
1733 }
1734
1735 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1736 {
1737         struct ethtool_pauseparam pauseparam;
1738
1739         if (!dev->ethtool_ops->set_pauseparam)
1740                 return -EOPNOTSUPP;
1741
1742         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1743                 return -EFAULT;
1744
1745         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1746 }
1747
1748 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1749 {
1750         struct ethtool_test test;
1751         const struct ethtool_ops *ops = dev->ethtool_ops;
1752         u64 *data;
1753         int ret, test_len;
1754
1755         if (!ops->self_test || !ops->get_sset_count)
1756                 return -EOPNOTSUPP;
1757
1758         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1759         if (test_len < 0)
1760                 return test_len;
1761         WARN_ON(test_len == 0);
1762
1763         if (copy_from_user(&test, useraddr, sizeof(test)))
1764                 return -EFAULT;
1765
1766         test.len = test_len;
1767         data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1768         if (!data)
1769                 return -ENOMEM;
1770
1771         ops->self_test(dev, &test, data);
1772
1773         ret = -EFAULT;
1774         if (copy_to_user(useraddr, &test, sizeof(test)))
1775                 goto out;
1776         useraddr += sizeof(test);
1777         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1778                 goto out;
1779         ret = 0;
1780
1781  out:
1782         kfree(data);
1783         return ret;
1784 }
1785
1786 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1787 {
1788         struct ethtool_gstrings gstrings;
1789         u8 *data;
1790         int ret;
1791
1792         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1793                 return -EFAULT;
1794
1795         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1796         if (ret < 0)
1797                 return ret;
1798         if (ret > S32_MAX / ETH_GSTRING_LEN)
1799                 return -ENOMEM;
1800         WARN_ON_ONCE(!ret);
1801
1802         gstrings.len = ret;
1803
1804         if (gstrings.len) {
1805                 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1806                 if (!data)
1807                         return -ENOMEM;
1808
1809                 __ethtool_get_strings(dev, gstrings.string_set, data);
1810         } else {
1811                 data = NULL;
1812         }
1813
1814         ret = -EFAULT;
1815         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1816                 goto out;
1817         useraddr += sizeof(gstrings);
1818         if (gstrings.len &&
1819             copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1820                 goto out;
1821         ret = 0;
1822
1823 out:
1824         vfree(data);
1825         return ret;
1826 }
1827
1828 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1829 {
1830         struct ethtool_value id;
1831         static bool busy;
1832         const struct ethtool_ops *ops = dev->ethtool_ops;
1833         int rc;
1834
1835         if (!ops->set_phys_id)
1836                 return -EOPNOTSUPP;
1837
1838         if (busy)
1839                 return -EBUSY;
1840
1841         if (copy_from_user(&id, useraddr, sizeof(id)))
1842                 return -EFAULT;
1843
1844         rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1845         if (rc < 0)
1846                 return rc;
1847
1848         /* Drop the RTNL lock while waiting, but prevent reentry or
1849          * removal of the device.
1850          */
1851         busy = true;
1852         dev_hold(dev);
1853         rtnl_unlock();
1854
1855         if (rc == 0) {
1856                 /* Driver will handle this itself */
1857                 schedule_timeout_interruptible(
1858                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1859         } else {
1860                 /* Driver expects to be called at twice the frequency in rc */
1861                 int n = rc * 2, i, interval = HZ / n;
1862
1863                 /* Count down seconds */
1864                 do {
1865                         /* Count down iterations per second */
1866                         i = n;
1867                         do {
1868                                 rtnl_lock();
1869                                 rc = ops->set_phys_id(dev,
1870                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1871                                 rtnl_unlock();
1872                                 if (rc)
1873                                         break;
1874                                 schedule_timeout_interruptible(interval);
1875                         } while (!signal_pending(current) && --i != 0);
1876                 } while (!signal_pending(current) &&
1877                          (id.data == 0 || --id.data != 0));
1878         }
1879
1880         rtnl_lock();
1881         dev_put(dev);
1882         busy = false;
1883
1884         (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1885         return rc;
1886 }
1887
1888 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1889 {
1890         struct ethtool_stats stats;
1891         const struct ethtool_ops *ops = dev->ethtool_ops;
1892         u64 *data;
1893         int ret, n_stats;
1894
1895         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1896                 return -EOPNOTSUPP;
1897
1898         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1899         if (n_stats < 0)
1900                 return n_stats;
1901         if (n_stats > S32_MAX / sizeof(u64))
1902                 return -ENOMEM;
1903         WARN_ON_ONCE(!n_stats);
1904         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1905                 return -EFAULT;
1906
1907         stats.n_stats = n_stats;
1908
1909         if (n_stats) {
1910                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1911                 if (!data)
1912                         return -ENOMEM;
1913                 ops->get_ethtool_stats(dev, &stats, data);
1914         } else {
1915                 data = NULL;
1916         }
1917
1918         ret = -EFAULT;
1919         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1920                 goto out;
1921         useraddr += sizeof(stats);
1922         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1923                 goto out;
1924         ret = 0;
1925
1926  out:
1927         vfree(data);
1928         return ret;
1929 }
1930
1931 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1932 {
1933         const struct ethtool_ops *ops = dev->ethtool_ops;
1934         struct phy_device *phydev = dev->phydev;
1935         struct ethtool_stats stats;
1936         u64 *data;
1937         int ret, n_stats;
1938
1939         if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1940                 return -EOPNOTSUPP;
1941
1942         if (dev->phydev && !ops->get_ethtool_phy_stats)
1943                 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1944         else
1945                 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1946         if (n_stats < 0)
1947                 return n_stats;
1948         if (n_stats > S32_MAX / sizeof(u64))
1949                 return -ENOMEM;
1950         WARN_ON_ONCE(!n_stats);
1951
1952         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1953                 return -EFAULT;
1954
1955         stats.n_stats = n_stats;
1956
1957         if (n_stats) {
1958                 data = vzalloc(array_size(n_stats, sizeof(u64)));
1959                 if (!data)
1960                         return -ENOMEM;
1961
1962                 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1963                         ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1964                         if (ret < 0)
1965                                 goto out;
1966                 } else {
1967                         ops->get_ethtool_phy_stats(dev, &stats, data);
1968                 }
1969         } else {
1970                 data = NULL;
1971         }
1972
1973         ret = -EFAULT;
1974         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1975                 goto out;
1976         useraddr += sizeof(stats);
1977         if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1978                 goto out;
1979         ret = 0;
1980
1981  out:
1982         vfree(data);
1983         return ret;
1984 }
1985
1986 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1987 {
1988         struct ethtool_perm_addr epaddr;
1989
1990         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1991                 return -EFAULT;
1992
1993         if (epaddr.size < dev->addr_len)
1994                 return -ETOOSMALL;
1995         epaddr.size = dev->addr_len;
1996
1997         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1998                 return -EFAULT;
1999         useraddr += sizeof(epaddr);
2000         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2001                 return -EFAULT;
2002         return 0;
2003 }
2004
2005 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2006                              u32 cmd, u32 (*actor)(struct net_device *))
2007 {
2008         struct ethtool_value edata = { .cmd = cmd };
2009
2010         if (!actor)
2011                 return -EOPNOTSUPP;
2012
2013         edata.data = actor(dev);
2014
2015         if (copy_to_user(useraddr, &edata, sizeof(edata)))
2016                 return -EFAULT;
2017         return 0;
2018 }
2019
2020 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2021                              void (*actor)(struct net_device *, u32))
2022 {
2023         struct ethtool_value edata;
2024
2025         if (!actor)
2026                 return -EOPNOTSUPP;
2027
2028         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2029                 return -EFAULT;
2030
2031         actor(dev, edata.data);
2032         return 0;
2033 }
2034
2035 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2036                              int (*actor)(struct net_device *, u32))
2037 {
2038         struct ethtool_value edata;
2039
2040         if (!actor)
2041                 return -EOPNOTSUPP;
2042
2043         if (copy_from_user(&edata, useraddr, sizeof(edata)))
2044                 return -EFAULT;
2045
2046         return actor(dev, edata.data);
2047 }
2048
2049 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2050                                                    char __user *useraddr)
2051 {
2052         struct ethtool_flash efl;
2053
2054         if (copy_from_user(&efl, useraddr, sizeof(efl)))
2055                 return -EFAULT;
2056         efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2057
2058         if (!dev->ethtool_ops->flash_device)
2059                 return devlink_compat_flash_update(dev, efl.data);
2060
2061         return dev->ethtool_ops->flash_device(dev, &efl);
2062 }
2063
2064 static int ethtool_set_dump(struct net_device *dev,
2065                         void __user *useraddr)
2066 {
2067         struct ethtool_dump dump;
2068
2069         if (!dev->ethtool_ops->set_dump)
2070                 return -EOPNOTSUPP;
2071
2072         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2073                 return -EFAULT;
2074
2075         return dev->ethtool_ops->set_dump(dev, &dump);
2076 }
2077
2078 static int ethtool_get_dump_flag(struct net_device *dev,
2079                                 void __user *useraddr)
2080 {
2081         int ret;
2082         struct ethtool_dump dump;
2083         const struct ethtool_ops *ops = dev->ethtool_ops;
2084
2085         if (!ops->get_dump_flag)
2086                 return -EOPNOTSUPP;
2087
2088         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2089                 return -EFAULT;
2090
2091         ret = ops->get_dump_flag(dev, &dump);
2092         if (ret)
2093                 return ret;
2094
2095         if (copy_to_user(useraddr, &dump, sizeof(dump)))
2096                 return -EFAULT;
2097         return 0;
2098 }
2099
2100 static int ethtool_get_dump_data(struct net_device *dev,
2101                                 void __user *useraddr)
2102 {
2103         int ret;
2104         __u32 len;
2105         struct ethtool_dump dump, tmp;
2106         const struct ethtool_ops *ops = dev->ethtool_ops;
2107         void *data = NULL;
2108
2109         if (!ops->get_dump_data || !ops->get_dump_flag)
2110                 return -EOPNOTSUPP;
2111
2112         if (copy_from_user(&dump, useraddr, sizeof(dump)))
2113                 return -EFAULT;
2114
2115         memset(&tmp, 0, sizeof(tmp));
2116         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2117         ret = ops->get_dump_flag(dev, &tmp);
2118         if (ret)
2119                 return ret;
2120
2121         len = min(tmp.len, dump.len);
2122         if (!len)
2123                 return -EFAULT;
2124
2125         /* Don't ever let the driver think there's more space available
2126          * than it requested with .get_dump_flag().
2127          */
2128         dump.len = len;
2129
2130         /* Always allocate enough space to hold the whole thing so that the
2131          * driver does not need to check the length and bother with partial
2132          * dumping.
2133          */
2134         data = vzalloc(tmp.len);
2135         if (!data)
2136                 return -ENOMEM;
2137         ret = ops->get_dump_data(dev, &dump, data);
2138         if (ret)
2139                 goto out;
2140
2141         /* There are two sane possibilities:
2142          * 1. The driver's .get_dump_data() does not touch dump.len.
2143          * 2. Or it may set dump.len to how much it really writes, which
2144          *    should be tmp.len (or len if it can do a partial dump).
2145          * In any case respond to userspace with the actual length of data
2146          * it's receiving.
2147          */
2148         WARN_ON(dump.len != len && dump.len != tmp.len);
2149         dump.len = len;
2150
2151         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2152                 ret = -EFAULT;
2153                 goto out;
2154         }
2155         useraddr += offsetof(struct ethtool_dump, data);
2156         if (copy_to_user(useraddr, data, len))
2157                 ret = -EFAULT;
2158 out:
2159         vfree(data);
2160         return ret;
2161 }
2162
2163 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2164 {
2165         int err = 0;
2166         struct ethtool_ts_info info;
2167         const struct ethtool_ops *ops = dev->ethtool_ops;
2168         struct phy_device *phydev = dev->phydev;
2169
2170         memset(&info, 0, sizeof(info));
2171         info.cmd = ETHTOOL_GET_TS_INFO;
2172
2173         if (phydev && phydev->drv && phydev->drv->ts_info) {
2174                 err = phydev->drv->ts_info(phydev, &info);
2175         } else if (ops->get_ts_info) {
2176                 err = ops->get_ts_info(dev, &info);
2177         } else {
2178                 info.so_timestamping =
2179                         SOF_TIMESTAMPING_RX_SOFTWARE |
2180                         SOF_TIMESTAMPING_SOFTWARE;
2181                 info.phc_index = -1;
2182         }
2183
2184         if (err)
2185                 return err;
2186
2187         if (copy_to_user(useraddr, &info, sizeof(info)))
2188                 err = -EFAULT;
2189
2190         return err;
2191 }
2192
2193 static int __ethtool_get_module_info(struct net_device *dev,
2194                                      struct ethtool_modinfo *modinfo)
2195 {
2196         const struct ethtool_ops *ops = dev->ethtool_ops;
2197         struct phy_device *phydev = dev->phydev;
2198
2199         if (dev->sfp_bus)
2200                 return sfp_get_module_info(dev->sfp_bus, modinfo);
2201
2202         if (phydev && phydev->drv && phydev->drv->module_info)
2203                 return phydev->drv->module_info(phydev, modinfo);
2204
2205         if (ops->get_module_info)
2206                 return ops->get_module_info(dev, modinfo);
2207
2208         return -EOPNOTSUPP;
2209 }
2210
2211 static int ethtool_get_module_info(struct net_device *dev,
2212                                    void __user *useraddr)
2213 {
2214         int ret;
2215         struct ethtool_modinfo modinfo;
2216
2217         if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2218                 return -EFAULT;
2219
2220         ret = __ethtool_get_module_info(dev, &modinfo);
2221         if (ret)
2222                 return ret;
2223
2224         if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2225                 return -EFAULT;
2226
2227         return 0;
2228 }
2229
2230 static int __ethtool_get_module_eeprom(struct net_device *dev,
2231                                        struct ethtool_eeprom *ee, u8 *data)
2232 {
2233         const struct ethtool_ops *ops = dev->ethtool_ops;
2234         struct phy_device *phydev = dev->phydev;
2235
2236         if (dev->sfp_bus)
2237                 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2238
2239         if (phydev && phydev->drv && phydev->drv->module_eeprom)
2240                 return phydev->drv->module_eeprom(phydev, ee, data);
2241
2242         if (ops->get_module_eeprom)
2243                 return ops->get_module_eeprom(dev, ee, data);
2244
2245         return -EOPNOTSUPP;
2246 }
2247
2248 static int ethtool_get_module_eeprom(struct net_device *dev,
2249                                      void __user *useraddr)
2250 {
2251         int ret;
2252         struct ethtool_modinfo modinfo;
2253
2254         ret = __ethtool_get_module_info(dev, &modinfo);
2255         if (ret)
2256                 return ret;
2257
2258         return ethtool_get_any_eeprom(dev, useraddr,
2259                                       __ethtool_get_module_eeprom,
2260                                       modinfo.eeprom_len);
2261 }
2262
2263 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2264 {
2265         switch (tuna->id) {
2266         case ETHTOOL_RX_COPYBREAK:
2267         case ETHTOOL_TX_COPYBREAK:
2268                 if (tuna->len != sizeof(u32) ||
2269                     tuna->type_id != ETHTOOL_TUNABLE_U32)
2270                         return -EINVAL;
2271                 break;
2272         case ETHTOOL_PFC_PREVENTION_TOUT:
2273                 if (tuna->len != sizeof(u16) ||
2274                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2275                         return -EINVAL;
2276                 break;
2277         default:
2278                 return -EINVAL;
2279         }
2280
2281         return 0;
2282 }
2283
2284 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2285 {
2286         int ret;
2287         struct ethtool_tunable tuna;
2288         const struct ethtool_ops *ops = dev->ethtool_ops;
2289         void *data;
2290
2291         if (!ops->get_tunable)
2292                 return -EOPNOTSUPP;
2293         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2294                 return -EFAULT;
2295         ret = ethtool_tunable_valid(&tuna);
2296         if (ret)
2297                 return ret;
2298         data = kmalloc(tuna.len, GFP_USER);
2299         if (!data)
2300                 return -ENOMEM;
2301         ret = ops->get_tunable(dev, &tuna, data);
2302         if (ret)
2303                 goto out;
2304         useraddr += sizeof(tuna);
2305         ret = -EFAULT;
2306         if (copy_to_user(useraddr, data, tuna.len))
2307                 goto out;
2308         ret = 0;
2309
2310 out:
2311         kfree(data);
2312         return ret;
2313 }
2314
2315 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2316 {
2317         int ret;
2318         struct ethtool_tunable tuna;
2319         const struct ethtool_ops *ops = dev->ethtool_ops;
2320         void *data;
2321
2322         if (!ops->set_tunable)
2323                 return -EOPNOTSUPP;
2324         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2325                 return -EFAULT;
2326         ret = ethtool_tunable_valid(&tuna);
2327         if (ret)
2328                 return ret;
2329         useraddr += sizeof(tuna);
2330         data = memdup_user(useraddr, tuna.len);
2331         if (IS_ERR(data))
2332                 return PTR_ERR(data);
2333         ret = ops->set_tunable(dev, &tuna, data);
2334
2335         kfree(data);
2336         return ret;
2337 }
2338
2339 static noinline_for_stack int
2340 ethtool_get_per_queue_coalesce(struct net_device *dev,
2341                                void __user *useraddr,
2342                                struct ethtool_per_queue_op *per_queue_opt)
2343 {
2344         u32 bit;
2345         int ret;
2346         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2347
2348         if (!dev->ethtool_ops->get_per_queue_coalesce)
2349                 return -EOPNOTSUPP;
2350
2351         useraddr += sizeof(*per_queue_opt);
2352
2353         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2354                           MAX_NUM_QUEUE);
2355
2356         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2357                 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2358
2359                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2360                 if (ret != 0)
2361                         return ret;
2362                 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2363                         return -EFAULT;
2364                 useraddr += sizeof(coalesce);
2365         }
2366
2367         return 0;
2368 }
2369
2370 static noinline_for_stack int
2371 ethtool_set_per_queue_coalesce(struct net_device *dev,
2372                                void __user *useraddr,
2373                                struct ethtool_per_queue_op *per_queue_opt)
2374 {
2375         u32 bit;
2376         int i, ret = 0;
2377         int n_queue;
2378         struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2379         DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2380
2381         if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2382             (!dev->ethtool_ops->get_per_queue_coalesce))
2383                 return -EOPNOTSUPP;
2384
2385         useraddr += sizeof(*per_queue_opt);
2386
2387         bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2388         n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2389         tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2390         if (!backup)
2391                 return -ENOMEM;
2392
2393         for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2394                 struct ethtool_coalesce coalesce;
2395
2396                 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2397                 if (ret != 0)
2398                         goto roll_back;
2399
2400                 tmp++;
2401
2402                 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2403                         ret = -EFAULT;
2404                         goto roll_back;
2405                 }
2406
2407                 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2408                 if (ret != 0)
2409                         goto roll_back;
2410
2411                 useraddr += sizeof(coalesce);
2412         }
2413
2414 roll_back:
2415         if (ret != 0) {
2416                 tmp = backup;
2417                 for_each_set_bit(i, queue_mask, bit) {
2418                         dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2419                         tmp++;
2420                 }
2421         }
2422         kfree(backup);
2423
2424         return ret;
2425 }
2426
2427 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2428                                  void __user *useraddr, u32 sub_cmd)
2429 {
2430         struct ethtool_per_queue_op per_queue_opt;
2431
2432         if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2433                 return -EFAULT;
2434
2435         if (per_queue_opt.sub_command != sub_cmd)
2436                 return -EINVAL;
2437
2438         switch (per_queue_opt.sub_command) {
2439         case ETHTOOL_GCOALESCE:
2440                 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2441         case ETHTOOL_SCOALESCE:
2442                 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2443         default:
2444                 return -EOPNOTSUPP;
2445         };
2446 }
2447
2448 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2449 {
2450         switch (tuna->id) {
2451         case ETHTOOL_PHY_DOWNSHIFT:
2452         case ETHTOOL_PHY_FAST_LINK_DOWN:
2453                 if (tuna->len != sizeof(u8) ||
2454                     tuna->type_id != ETHTOOL_TUNABLE_U8)
2455                         return -EINVAL;
2456                 break;
2457         case ETHTOOL_PHY_EDPD:
2458                 if (tuna->len != sizeof(u16) ||
2459                     tuna->type_id != ETHTOOL_TUNABLE_U16)
2460                         return -EINVAL;
2461                 break;
2462         default:
2463                 return -EINVAL;
2464         }
2465
2466         return 0;
2467 }
2468
2469 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2470 {
2471         int ret;
2472         struct ethtool_tunable tuna;
2473         struct phy_device *phydev = dev->phydev;
2474         void *data;
2475
2476         if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2477                 return -EOPNOTSUPP;
2478
2479         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2480                 return -EFAULT;
2481         ret = ethtool_phy_tunable_valid(&tuna);
2482         if (ret)
2483                 return ret;
2484         data = kmalloc(tuna.len, GFP_USER);
2485         if (!data)
2486                 return -ENOMEM;
2487         mutex_lock(&phydev->lock);
2488         ret = phydev->drv->get_tunable(phydev, &tuna, data);
2489         mutex_unlock(&phydev->lock);
2490         if (ret)
2491                 goto out;
2492         useraddr += sizeof(tuna);
2493         ret = -EFAULT;
2494         if (copy_to_user(useraddr, data, tuna.len))
2495                 goto out;
2496         ret = 0;
2497
2498 out:
2499         kfree(data);
2500         return ret;
2501 }
2502
2503 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2504 {
2505         int ret;
2506         struct ethtool_tunable tuna;
2507         struct phy_device *phydev = dev->phydev;
2508         void *data;
2509
2510         if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2511                 return -EOPNOTSUPP;
2512         if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2513                 return -EFAULT;
2514         ret = ethtool_phy_tunable_valid(&tuna);
2515         if (ret)
2516                 return ret;
2517         useraddr += sizeof(tuna);
2518         data = memdup_user(useraddr, tuna.len);
2519         if (IS_ERR(data))
2520                 return PTR_ERR(data);
2521         mutex_lock(&phydev->lock);
2522         ret = phydev->drv->set_tunable(phydev, &tuna, data);
2523         mutex_unlock(&phydev->lock);
2524
2525         kfree(data);
2526         return ret;
2527 }
2528
2529 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2530 {
2531         struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2532         int rc;
2533
2534         if (!dev->ethtool_ops->get_fecparam)
2535                 return -EOPNOTSUPP;
2536
2537         rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2538         if (rc)
2539                 return rc;
2540
2541         if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2542                 return -EFAULT;
2543         return 0;
2544 }
2545
2546 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2547 {
2548         struct ethtool_fecparam fecparam;
2549
2550         if (!dev->ethtool_ops->set_fecparam)
2551                 return -EOPNOTSUPP;
2552
2553         if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2554                 return -EFAULT;
2555
2556         return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2557 }
2558
2559 /* The main entry point in this file.  Called from net/core/dev_ioctl.c */
2560
2561 int dev_ethtool(struct net *net, struct ifreq *ifr)
2562 {
2563         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2564         void __user *useraddr = ifr->ifr_data;
2565         u32 ethcmd, sub_cmd;
2566         int rc;
2567         netdev_features_t old_features;
2568
2569         if (!dev || !netif_device_present(dev))
2570                 return -ENODEV;
2571
2572         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2573                 return -EFAULT;
2574
2575         if (ethcmd == ETHTOOL_PERQUEUE) {
2576                 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2577                         return -EFAULT;
2578         } else {
2579                 sub_cmd = ethcmd;
2580         }
2581         /* Allow some commands to be done by anyone */
2582         switch (sub_cmd) {
2583         case ETHTOOL_GSET:
2584         case ETHTOOL_GDRVINFO:
2585         case ETHTOOL_GMSGLVL:
2586         case ETHTOOL_GLINK:
2587         case ETHTOOL_GCOALESCE:
2588         case ETHTOOL_GRINGPARAM:
2589         case ETHTOOL_GPAUSEPARAM:
2590         case ETHTOOL_GRXCSUM:
2591         case ETHTOOL_GTXCSUM:
2592         case ETHTOOL_GSG:
2593         case ETHTOOL_GSSET_INFO:
2594         case ETHTOOL_GSTRINGS:
2595         case ETHTOOL_GSTATS:
2596         case ETHTOOL_GPHYSTATS:
2597         case ETHTOOL_GTSO:
2598         case ETHTOOL_GPERMADDR:
2599         case ETHTOOL_GUFO:
2600         case ETHTOOL_GGSO:
2601         case ETHTOOL_GGRO:
2602         case ETHTOOL_GFLAGS:
2603         case ETHTOOL_GPFLAGS:
2604         case ETHTOOL_GRXFH:
2605         case ETHTOOL_GRXRINGS:
2606         case ETHTOOL_GRXCLSRLCNT:
2607         case ETHTOOL_GRXCLSRULE:
2608         case ETHTOOL_GRXCLSRLALL:
2609         case ETHTOOL_GRXFHINDIR:
2610         case ETHTOOL_GRSSH:
2611         case ETHTOOL_GFEATURES:
2612         case ETHTOOL_GCHANNELS:
2613         case ETHTOOL_GET_TS_INFO:
2614         case ETHTOOL_GEEE:
2615         case ETHTOOL_GTUNABLE:
2616         case ETHTOOL_PHY_GTUNABLE:
2617         case ETHTOOL_GLINKSETTINGS:
2618         case ETHTOOL_GFECPARAM:
2619                 break;
2620         default:
2621                 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2622                         return -EPERM;
2623         }
2624
2625         if (dev->ethtool_ops->begin) {
2626                 rc = dev->ethtool_ops->begin(dev);
2627                 if (rc  < 0)
2628                         return rc;
2629         }
2630         old_features = dev->features;
2631
2632         switch (ethcmd) {
2633         case ETHTOOL_GSET:
2634                 rc = ethtool_get_settings(dev, useraddr);
2635                 break;
2636         case ETHTOOL_SSET:
2637                 rc = ethtool_set_settings(dev, useraddr);
2638                 break;
2639         case ETHTOOL_GDRVINFO:
2640                 rc = ethtool_get_drvinfo(dev, useraddr);
2641                 break;
2642         case ETHTOOL_GREGS:
2643                 rc = ethtool_get_regs(dev, useraddr);
2644                 break;
2645         case ETHTOOL_GWOL:
2646                 rc = ethtool_get_wol(dev, useraddr);
2647                 break;
2648         case ETHTOOL_SWOL:
2649                 rc = ethtool_set_wol(dev, useraddr);
2650                 break;
2651         case ETHTOOL_GMSGLVL:
2652                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2653                                        dev->ethtool_ops->get_msglevel);
2654                 break;
2655         case ETHTOOL_SMSGLVL:
2656                 rc = ethtool_set_value_void(dev, useraddr,
2657                                        dev->ethtool_ops->set_msglevel);
2658                 break;
2659         case ETHTOOL_GEEE:
2660                 rc = ethtool_get_eee(dev, useraddr);
2661                 break;
2662         case ETHTOOL_SEEE:
2663                 rc = ethtool_set_eee(dev, useraddr);
2664                 break;
2665         case ETHTOOL_NWAY_RST:
2666                 rc = ethtool_nway_reset(dev);
2667                 break;
2668         case ETHTOOL_GLINK:
2669                 rc = ethtool_get_link(dev, useraddr);
2670                 break;
2671         case ETHTOOL_GEEPROM:
2672                 rc = ethtool_get_eeprom(dev, useraddr);
2673                 break;
2674         case ETHTOOL_SEEPROM:
2675                 rc = ethtool_set_eeprom(dev, useraddr);
2676                 break;
2677         case ETHTOOL_GCOALESCE:
2678                 rc = ethtool_get_coalesce(dev, useraddr);
2679                 break;
2680         case ETHTOOL_SCOALESCE:
2681                 rc = ethtool_set_coalesce(dev, useraddr);
2682                 break;
2683         case ETHTOOL_GRINGPARAM:
2684                 rc = ethtool_get_ringparam(dev, useraddr);
2685                 break;
2686         case ETHTOOL_SRINGPARAM:
2687                 rc = ethtool_set_ringparam(dev, useraddr);
2688                 break;
2689         case ETHTOOL_GPAUSEPARAM:
2690                 rc = ethtool_get_pauseparam(dev, useraddr);
2691                 break;
2692         case ETHTOOL_SPAUSEPARAM:
2693                 rc = ethtool_set_pauseparam(dev, useraddr);
2694                 break;
2695         case ETHTOOL_TEST:
2696                 rc = ethtool_self_test(dev, useraddr);
2697                 break;
2698         case ETHTOOL_GSTRINGS:
2699                 rc = ethtool_get_strings(dev, useraddr);
2700                 break;
2701         case ETHTOOL_PHYS_ID:
2702                 rc = ethtool_phys_id(dev, useraddr);
2703                 break;
2704         case ETHTOOL_GSTATS:
2705                 rc = ethtool_get_stats(dev, useraddr);
2706                 break;
2707         case ETHTOOL_GPERMADDR:
2708                 rc = ethtool_get_perm_addr(dev, useraddr);
2709                 break;
2710         case ETHTOOL_GFLAGS:
2711                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2712                                         __ethtool_get_flags);
2713                 break;
2714         case ETHTOOL_SFLAGS:
2715                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2716                 break;
2717         case ETHTOOL_GPFLAGS:
2718                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2719                                        dev->ethtool_ops->get_priv_flags);
2720                 break;
2721         case ETHTOOL_SPFLAGS:
2722                 rc = ethtool_set_value(dev, useraddr,
2723                                        dev->ethtool_ops->set_priv_flags);
2724                 break;
2725         case ETHTOOL_GRXFH:
2726         case ETHTOOL_GRXRINGS:
2727         case ETHTOOL_GRXCLSRLCNT:
2728         case ETHTOOL_GRXCLSRULE:
2729         case ETHTOOL_GRXCLSRLALL:
2730                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2731                 break;
2732         case ETHTOOL_SRXFH:
2733         case ETHTOOL_SRXCLSRLDEL:
2734         case ETHTOOL_SRXCLSRLINS:
2735                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2736                 break;
2737         case ETHTOOL_FLASHDEV:
2738                 rc = ethtool_flash_device(dev, useraddr);
2739                 break;
2740         case ETHTOOL_RESET:
2741                 rc = ethtool_reset(dev, useraddr);
2742                 break;
2743         case ETHTOOL_GSSET_INFO:
2744                 rc = ethtool_get_sset_info(dev, useraddr);
2745                 break;
2746         case ETHTOOL_GRXFHINDIR:
2747                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2748                 break;
2749         case ETHTOOL_SRXFHINDIR:
2750                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2751                 break;
2752         case ETHTOOL_GRSSH:
2753                 rc = ethtool_get_rxfh(dev, useraddr);
2754                 break;
2755         case ETHTOOL_SRSSH:
2756                 rc = ethtool_set_rxfh(dev, useraddr);
2757                 break;
2758         case ETHTOOL_GFEATURES:
2759                 rc = ethtool_get_features(dev, useraddr);
2760                 break;
2761         case ETHTOOL_SFEATURES:
2762                 rc = ethtool_set_features(dev, useraddr);
2763                 break;
2764         case ETHTOOL_GTXCSUM:
2765         case ETHTOOL_GRXCSUM:
2766         case ETHTOOL_GSG:
2767         case ETHTOOL_GTSO:
2768         case ETHTOOL_GGSO:
2769         case ETHTOOL_GGRO:
2770                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2771                 break;
2772         case ETHTOOL_STXCSUM:
2773         case ETHTOOL_SRXCSUM:
2774         case ETHTOOL_SSG:
2775         case ETHTOOL_STSO:
2776         case ETHTOOL_SGSO:
2777         case ETHTOOL_SGRO:
2778                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2779                 break;
2780         case ETHTOOL_GCHANNELS:
2781                 rc = ethtool_get_channels(dev, useraddr);
2782                 break;
2783         case ETHTOOL_SCHANNELS:
2784                 rc = ethtool_set_channels(dev, useraddr);
2785                 break;
2786         case ETHTOOL_SET_DUMP:
2787                 rc = ethtool_set_dump(dev, useraddr);
2788                 break;
2789         case ETHTOOL_GET_DUMP_FLAG:
2790                 rc = ethtool_get_dump_flag(dev, useraddr);
2791                 break;
2792         case ETHTOOL_GET_DUMP_DATA:
2793                 rc = ethtool_get_dump_data(dev, useraddr);
2794                 break;
2795         case ETHTOOL_GET_TS_INFO:
2796                 rc = ethtool_get_ts_info(dev, useraddr);
2797                 break;
2798         case ETHTOOL_GMODULEINFO:
2799                 rc = ethtool_get_module_info(dev, useraddr);
2800                 break;
2801         case ETHTOOL_GMODULEEEPROM:
2802                 rc = ethtool_get_module_eeprom(dev, useraddr);
2803                 break;
2804         case ETHTOOL_GTUNABLE:
2805                 rc = ethtool_get_tunable(dev, useraddr);
2806                 break;
2807         case ETHTOOL_STUNABLE:
2808                 rc = ethtool_set_tunable(dev, useraddr);
2809                 break;
2810         case ETHTOOL_GPHYSTATS:
2811                 rc = ethtool_get_phy_stats(dev, useraddr);
2812                 break;
2813         case ETHTOOL_PERQUEUE:
2814                 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2815                 break;
2816         case ETHTOOL_GLINKSETTINGS:
2817                 rc = ethtool_get_link_ksettings(dev, useraddr);
2818                 break;
2819         case ETHTOOL_SLINKSETTINGS:
2820                 rc = ethtool_set_link_ksettings(dev, useraddr);
2821                 break;
2822         case ETHTOOL_PHY_GTUNABLE:
2823                 rc = get_phy_tunable(dev, useraddr);
2824                 break;
2825         case ETHTOOL_PHY_STUNABLE:
2826                 rc = set_phy_tunable(dev, useraddr);
2827                 break;
2828         case ETHTOOL_GFECPARAM:
2829                 rc = ethtool_get_fecparam(dev, useraddr);
2830                 break;
2831         case ETHTOOL_SFECPARAM:
2832                 rc = ethtool_set_fecparam(dev, useraddr);
2833                 break;
2834         default:
2835                 rc = -EOPNOTSUPP;
2836         }
2837
2838         if (dev->ethtool_ops->complete)
2839                 dev->ethtool_ops->complete(dev);
2840
2841         if (old_features != dev->features)
2842                 netdev_features_change(dev);
2843
2844         return rc;
2845 }
2846
2847 struct ethtool_rx_flow_key {
2848         struct flow_dissector_key_basic                 basic;
2849         union {
2850                 struct flow_dissector_key_ipv4_addrs    ipv4;
2851                 struct flow_dissector_key_ipv6_addrs    ipv6;
2852         };
2853         struct flow_dissector_key_ports                 tp;
2854         struct flow_dissector_key_ip                    ip;
2855         struct flow_dissector_key_vlan                  vlan;
2856         struct flow_dissector_key_eth_addrs             eth_addrs;
2857 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2858
2859 struct ethtool_rx_flow_match {
2860         struct flow_dissector           dissector;
2861         struct ethtool_rx_flow_key      key;
2862         struct ethtool_rx_flow_key      mask;
2863 };
2864
2865 struct ethtool_rx_flow_rule *
2866 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2867 {
2868         const struct ethtool_rx_flow_spec *fs = input->fs;
2869         static struct in6_addr zero_addr = {};
2870         struct ethtool_rx_flow_match *match;
2871         struct ethtool_rx_flow_rule *flow;
2872         struct flow_action_entry *act;
2873
2874         flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2875                        sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2876         if (!flow)
2877                 return ERR_PTR(-ENOMEM);
2878
2879         /* ethtool_rx supports only one single action per rule. */
2880         flow->rule = flow_rule_alloc(1);
2881         if (!flow->rule) {
2882                 kfree(flow);
2883                 return ERR_PTR(-ENOMEM);
2884         }
2885
2886         match = (struct ethtool_rx_flow_match *)flow->priv;
2887         flow->rule->match.dissector     = &match->dissector;
2888         flow->rule->match.mask          = &match->mask;
2889         flow->rule->match.key           = &match->key;
2890
2891         match->mask.basic.n_proto = htons(0xffff);
2892
2893         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2894         case ETHER_FLOW: {
2895                 const struct ethhdr *ether_spec, *ether_m_spec;
2896
2897                 ether_spec = &fs->h_u.ether_spec;
2898                 ether_m_spec = &fs->m_u.ether_spec;
2899
2900                 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
2901                         ether_addr_copy(match->key.eth_addrs.src,
2902                                         ether_spec->h_source);
2903                         ether_addr_copy(match->mask.eth_addrs.src,
2904                                         ether_m_spec->h_source);
2905                 }
2906                 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
2907                         ether_addr_copy(match->key.eth_addrs.dst,
2908                                         ether_spec->h_dest);
2909                         ether_addr_copy(match->mask.eth_addrs.dst,
2910                                         ether_m_spec->h_dest);
2911                 }
2912                 if (ether_m_spec->h_proto) {
2913                         match->key.basic.n_proto = ether_spec->h_proto;
2914                         match->mask.basic.n_proto = ether_m_spec->h_proto;
2915                 }
2916                 }
2917                 break;
2918         case TCP_V4_FLOW:
2919         case UDP_V4_FLOW: {
2920                 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2921
2922                 match->key.basic.n_proto = htons(ETH_P_IP);
2923
2924                 v4_spec = &fs->h_u.tcp_ip4_spec;
2925                 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2926
2927                 if (v4_m_spec->ip4src) {
2928                         match->key.ipv4.src = v4_spec->ip4src;
2929                         match->mask.ipv4.src = v4_m_spec->ip4src;
2930                 }
2931                 if (v4_m_spec->ip4dst) {
2932                         match->key.ipv4.dst = v4_spec->ip4dst;
2933                         match->mask.ipv4.dst = v4_m_spec->ip4dst;
2934                 }
2935                 if (v4_m_spec->ip4src ||
2936                     v4_m_spec->ip4dst) {
2937                         match->dissector.used_keys |=
2938                                 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2939                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2940                                 offsetof(struct ethtool_rx_flow_key, ipv4);
2941                 }
2942                 if (v4_m_spec->psrc) {
2943                         match->key.tp.src = v4_spec->psrc;
2944                         match->mask.tp.src = v4_m_spec->psrc;
2945                 }
2946                 if (v4_m_spec->pdst) {
2947                         match->key.tp.dst = v4_spec->pdst;
2948                         match->mask.tp.dst = v4_m_spec->pdst;
2949                 }
2950                 if (v4_m_spec->psrc ||
2951                     v4_m_spec->pdst) {
2952                         match->dissector.used_keys |=
2953                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
2954                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2955                                 offsetof(struct ethtool_rx_flow_key, tp);
2956                 }
2957                 if (v4_m_spec->tos) {
2958                         match->key.ip.tos = v4_spec->tos;
2959                         match->mask.ip.tos = v4_m_spec->tos;
2960                         match->dissector.used_keys |=
2961                                 BIT(FLOW_DISSECTOR_KEY_IP);
2962                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2963                                 offsetof(struct ethtool_rx_flow_key, ip);
2964                 }
2965                 }
2966                 break;
2967         case TCP_V6_FLOW:
2968         case UDP_V6_FLOW: {
2969                 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2970
2971                 match->key.basic.n_proto = htons(ETH_P_IPV6);
2972
2973                 v6_spec = &fs->h_u.tcp_ip6_spec;
2974                 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2975                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2976                         memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2977                                sizeof(match->key.ipv6.src));
2978                         memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2979                                sizeof(match->mask.ipv6.src));
2980                 }
2981                 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2982                         memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2983                                sizeof(match->key.ipv6.dst));
2984                         memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2985                                sizeof(match->mask.ipv6.dst));
2986                 }
2987                 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2988                     memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2989                         match->dissector.used_keys |=
2990                                 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2991                         match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2992                                 offsetof(struct ethtool_rx_flow_key, ipv6);
2993                 }
2994                 if (v6_m_spec->psrc) {
2995                         match->key.tp.src = v6_spec->psrc;
2996                         match->mask.tp.src = v6_m_spec->psrc;
2997                 }
2998                 if (v6_m_spec->pdst) {
2999                         match->key.tp.dst = v6_spec->pdst;
3000                         match->mask.tp.dst = v6_m_spec->pdst;
3001                 }
3002                 if (v6_m_spec->psrc ||
3003                     v6_m_spec->pdst) {
3004                         match->dissector.used_keys |=
3005                                 BIT(FLOW_DISSECTOR_KEY_PORTS);
3006                         match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3007                                 offsetof(struct ethtool_rx_flow_key, tp);
3008                 }
3009                 if (v6_m_spec->tclass) {
3010                         match->key.ip.tos = v6_spec->tclass;
3011                         match->mask.ip.tos = v6_m_spec->tclass;
3012                         match->dissector.used_keys |=
3013                                 BIT(FLOW_DISSECTOR_KEY_IP);
3014                         match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3015                                 offsetof(struct ethtool_rx_flow_key, ip);
3016                 }
3017                 }
3018                 break;
3019         default:
3020                 ethtool_rx_flow_rule_destroy(flow);
3021                 return ERR_PTR(-EINVAL);
3022         }
3023
3024         switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3025         case TCP_V4_FLOW:
3026         case TCP_V6_FLOW:
3027                 match->key.basic.ip_proto = IPPROTO_TCP;
3028                 break;
3029         case UDP_V4_FLOW:
3030         case UDP_V6_FLOW:
3031                 match->key.basic.ip_proto = IPPROTO_UDP;
3032                 break;
3033         }
3034         match->mask.basic.ip_proto = 0xff;
3035
3036         match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3037         match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3038                 offsetof(struct ethtool_rx_flow_key, basic);
3039
3040         if (fs->flow_type & FLOW_EXT) {
3041                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3042                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3043
3044                 if (ext_m_spec->vlan_etype) {
3045                         match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3046                         match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3047                 }
3048
3049                 if (ext_m_spec->vlan_tci) {
3050                         match->key.vlan.vlan_id =
3051                                 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3052                         match->mask.vlan.vlan_id =
3053                                 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3054
3055                         match->key.vlan.vlan_dei =
3056                                 !!(ext_h_spec->vlan_tci & htons(0x1000));
3057                         match->mask.vlan.vlan_dei =
3058                                 !!(ext_m_spec->vlan_tci & htons(0x1000));
3059
3060                         match->key.vlan.vlan_priority =
3061                                 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3062                         match->mask.vlan.vlan_priority =
3063                                 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3064                 }
3065
3066                 if (ext_m_spec->vlan_etype ||
3067                     ext_m_spec->vlan_tci) {
3068                         match->dissector.used_keys |=
3069                                 BIT(FLOW_DISSECTOR_KEY_VLAN);
3070                         match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3071                                 offsetof(struct ethtool_rx_flow_key, vlan);
3072                 }
3073         }
3074         if (fs->flow_type & FLOW_MAC_EXT) {
3075                 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3076                 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3077
3078                 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3079                        ETH_ALEN);
3080                 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3081                        ETH_ALEN);
3082
3083                 match->dissector.used_keys |=
3084                         BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3085                 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3086                         offsetof(struct ethtool_rx_flow_key, eth_addrs);
3087         }
3088
3089         act = &flow->rule->action.entries[0];
3090         switch (fs->ring_cookie) {
3091         case RX_CLS_FLOW_DISC:
3092                 act->id = FLOW_ACTION_DROP;
3093                 break;
3094         case RX_CLS_FLOW_WAKE:
3095                 act->id = FLOW_ACTION_WAKE;
3096                 break;
3097         default:
3098                 act->id = FLOW_ACTION_QUEUE;
3099                 if (fs->flow_type & FLOW_RSS)
3100                         act->queue.ctx = input->rss_ctx;
3101
3102                 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3103                 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3104                 break;
3105         }
3106
3107         return flow;
3108 }
3109 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3110
3111 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3112 {
3113         kfree(flow->rule);
3114         kfree(flow);
3115 }
3116 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);