net/core/ethtool.c

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