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