// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * net/core/ethtool.c - Ethtool ioctl handler
 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
 *
 * This file is where we call all the ethtool_ops commands to get
 * the information ethtool needs.
 */

#include <linux/compat.h>
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/sfp.h>
#include <linux/slab.h>
#include <linux/rtnetlink.h>
#include <linux/sched/signal.h>
#include <linux/net.h>
#include <linux/pm_runtime.h>
#include <linux/utsname.h>
#include <net/devlink.h>
#include <net/ipv6.h>
#include <net/xdp_sock_drv.h>
#include <net/flow_offload.h>
#include <net/netdev_lock.h>
#include <linux/ethtool_netlink.h>
#include "common.h"

/* State held across locks and calls for commands which have devlink fallback */
struct ethtool_devlink_compat {
        struct devlink *devlink;
        union {
                struct ethtool_flash efl;
                struct ethtool_drvinfo info;
        };
};

static struct devlink *netdev_to_devlink_get(struct net_device *dev)
{
        if (!dev->devlink_port)
                return NULL;
        return devlink_try_get(dev->devlink_port->devlink);
}

/*
 * Some useful ethtool_ops methods that're device independent.
 * If we find that all drivers want to do the same thing here,
 * we can turn these into dev_() function calls.
 */

u32 ethtool_op_get_link(struct net_device *dev)
{
        /* Synchronize carrier state with link watch, see also rtnl_getlink() */
        __linkwatch_sync_dev(dev);

        return netif_carrier_ok(dev) ? 1 : 0;
}
EXPORT_SYMBOL(ethtool_op_get_link);

int ethtool_op_get_ts_info(struct net_device *dev,
                           struct kernel_ethtool_ts_info *info)
{
        info->so_timestamping =
                SOF_TIMESTAMPING_TX_SOFTWARE |
                SOF_TIMESTAMPING_RX_SOFTWARE |
                SOF_TIMESTAMPING_SOFTWARE;
        info->phc_index = -1;
        return 0;
}
EXPORT_SYMBOL(ethtool_op_get_ts_info);

/* Handlers for each ethtool command */

static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_gfeatures cmd = {
                .cmd = ETHTOOL_GFEATURES,
                .size = ETHTOOL_DEV_FEATURE_WORDS,
        };
        struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
        u32 __user *sizeaddr;
        u32 copy_size;
        int i;

        /* in case feature bits run out again */
        BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));

        for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
                features[i].available = (u32)(dev->hw_features >> (32 * i));
                features[i].requested = (u32)(dev->wanted_features >> (32 * i));
                features[i].active = (u32)(dev->features >> (32 * i));
                features[i].never_changed =
                        (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
        }

        sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
        if (get_user(copy_size, sizeaddr))
                return -EFAULT;

        if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
                copy_size = ETHTOOL_DEV_FEATURE_WORDS;

        if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
                return -EFAULT;
        useraddr += sizeof(cmd);
        if (copy_to_user(useraddr, features,
                         array_size(copy_size, sizeof(*features))))
                return -EFAULT;

        return 0;
}

static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_sfeatures cmd;
        struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
        netdev_features_t wanted = 0, valid = 0;
        int i, ret = 0;

        if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
                return -EFAULT;
        useraddr += sizeof(cmd);

        if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
                return -EINVAL;

        if (copy_from_user(features, useraddr, sizeof(features)))
                return -EFAULT;

        for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
                valid |= (netdev_features_t)features[i].valid << (32 * i);
                wanted |= (netdev_features_t)features[i].requested << (32 * i);
        }

        if (valid & ~NETIF_F_ETHTOOL_BITS)
                return -EINVAL;

        if (valid & ~dev->hw_features) {
                valid &= dev->hw_features;
                ret |= ETHTOOL_F_UNSUPPORTED;
        }

        dev->wanted_features &= ~valid;
        dev->wanted_features |= wanted & valid;
        __netdev_update_features(dev);

        if ((dev->wanted_features ^ dev->features) & valid)
                ret |= ETHTOOL_F_WISH;

        return ret;
}

static int __ethtool_get_sset_count(struct net_device *dev, int sset)
{
        const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
        const struct ethtool_ops *ops = dev->ethtool_ops;

        if (sset == ETH_SS_FEATURES)
                return ARRAY_SIZE(netdev_features_strings);

        if (sset == ETH_SS_RSS_HASH_FUNCS)
                return ARRAY_SIZE(rss_hash_func_strings);

        if (sset == ETH_SS_TUNABLES)
                return ARRAY_SIZE(tunable_strings);

        if (sset == ETH_SS_PHY_TUNABLES)
                return ARRAY_SIZE(phy_tunable_strings);

        if (sset == ETH_SS_PHY_STATS && dev->phydev &&
            !ops->get_ethtool_phy_stats &&
            phy_ops && phy_ops->get_sset_count)
                return phy_ops->get_sset_count(dev->phydev);

        if (sset == ETH_SS_LINK_MODES)
                return __ETHTOOL_LINK_MODE_MASK_NBITS;

        if (ops->get_sset_count && ops->get_strings)
                return ops->get_sset_count(dev, sset);
        else
                return -EOPNOTSUPP;
}

static void __ethtool_get_strings(struct net_device *dev,
        u32 stringset, u8 *data)
{
        const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
        const struct ethtool_ops *ops = dev->ethtool_ops;

        if (stringset == ETH_SS_FEATURES)
                memcpy(data, netdev_features_strings,
                        sizeof(netdev_features_strings));
        else if (stringset == ETH_SS_RSS_HASH_FUNCS)
                memcpy(data, rss_hash_func_strings,
                       sizeof(rss_hash_func_strings));
        else if (stringset == ETH_SS_TUNABLES)
                memcpy(data, tunable_strings, sizeof(tunable_strings));
        else if (stringset == ETH_SS_PHY_TUNABLES)
                memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
        else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
                 !ops->get_ethtool_phy_stats && phy_ops &&
                 phy_ops->get_strings)
                phy_ops->get_strings(dev->phydev, data);
        else if (stringset == ETH_SS_LINK_MODES)
                memcpy(data, link_mode_names,
                       __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
        else
                /* ops->get_strings is valid because checked earlier */
                ops->get_strings(dev, stringset, data);
}

static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
{
        /* feature masks of legacy discrete ethtool ops */

        switch (eth_cmd) {
        case ETHTOOL_GTXCSUM:
        case ETHTOOL_STXCSUM:
                return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
                       NETIF_F_SCTP_CRC;
        case ETHTOOL_GRXCSUM:
        case ETHTOOL_SRXCSUM:
                return NETIF_F_RXCSUM;
        case ETHTOOL_GSG:
        case ETHTOOL_SSG:
                return NETIF_F_SG | NETIF_F_FRAGLIST;
        case ETHTOOL_GTSO:
        case ETHTOOL_STSO:
                return NETIF_F_ALL_TSO;
        case ETHTOOL_GGSO:
        case ETHTOOL_SGSO:
                return NETIF_F_GSO;
        case ETHTOOL_GGRO:
        case ETHTOOL_SGRO:
                return NETIF_F_GRO;
        default:
                BUG();
        }
}

static int ethtool_get_one_feature(struct net_device *dev,
        char __user *useraddr, u32 ethcmd)
{
        netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
        struct ethtool_value edata = {
                .cmd = ethcmd,
                .data = !!(dev->features & mask),
        };

        if (copy_to_user(useraddr, &edata, sizeof(edata)))
                return -EFAULT;
        return 0;
}

static int ethtool_set_one_feature(struct net_device *dev,
        void __user *useraddr, u32 ethcmd)
{
        struct ethtool_value edata;
        netdev_features_t mask;

        if (copy_from_user(&edata, useraddr, sizeof(edata)))
                return -EFAULT;

        mask = ethtool_get_feature_mask(ethcmd);
        mask &= dev->hw_features;
        if (!mask)
                return -EOPNOTSUPP;

        if (edata.data)
                dev->wanted_features |= mask;
        else
                dev->wanted_features &= ~mask;

        __netdev_update_features(dev);

        return 0;
}

#define ETH_ALL_FLAGS    (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
                          ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
                          NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
                          NETIF_F_RXHASH)

static u32 __ethtool_get_flags(struct net_device *dev)
{
        u32 flags = 0;

        if (dev->features & NETIF_F_LRO)
                flags |= ETH_FLAG_LRO;
        if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
                flags |= ETH_FLAG_RXVLAN;
        if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
                flags |= ETH_FLAG_TXVLAN;
        if (dev->features & NETIF_F_NTUPLE)
                flags |= ETH_FLAG_NTUPLE;
        if (dev->features & NETIF_F_RXHASH)
                flags |= ETH_FLAG_RXHASH;

        return flags;
}

static int __ethtool_set_flags(struct net_device *dev, u32 data)
{
        netdev_features_t features = 0, changed;

        if (data & ~ETH_ALL_FLAGS)
                return -EINVAL;

        if (data & ETH_FLAG_LRO)
                features |= NETIF_F_LRO;
        if (data & ETH_FLAG_RXVLAN)
                features |= NETIF_F_HW_VLAN_CTAG_RX;
        if (data & ETH_FLAG_TXVLAN)
                features |= NETIF_F_HW_VLAN_CTAG_TX;
        if (data & ETH_FLAG_NTUPLE)
                features |= NETIF_F_NTUPLE;
        if (data & ETH_FLAG_RXHASH)
                features |= NETIF_F_RXHASH;

        /* allow changing only bits set in hw_features */
        changed = (features ^ dev->features) & ETH_ALL_FEATURES;
        if (changed & ~dev->hw_features)
                return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;

        dev->wanted_features =
                (dev->wanted_features & ~changed) | (features & changed);

        __netdev_update_features(dev);

        return 0;
}

/* Given two link masks, AND them together and save the result in dst. */
void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
                                  struct ethtool_link_ksettings *src)
{
        unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
        unsigned int idx = 0;

        for (; idx < size; idx++) {
                dst->link_modes.supported[idx] &=
                        src->link_modes.supported[idx];
                dst->link_modes.advertising[idx] &=
                        src->link_modes.advertising[idx];
        }
}
EXPORT_SYMBOL(ethtool_intersect_link_masks);

void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
                                             u32 legacy_u32)
{
        linkmode_zero(dst);
        dst[0] = legacy_u32;
}
EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);

/* return false if src had higher bits set. lower bits always updated. */
bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
                                             const unsigned long *src)
{
        *legacy_u32 = src[0];
        return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
                __ETHTOOL_LINK_MODE_MASK_NBITS;
}
EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);

/* return false if ksettings link modes had higher bits
 * set. legacy_settings always updated (best effort)
 */
static bool
convert_link_ksettings_to_legacy_settings(
        struct ethtool_cmd *legacy_settings,
        const struct ethtool_link_ksettings *link_ksettings)
{
        bool retval = true;

        memset(legacy_settings, 0, sizeof(*legacy_settings));
        /* this also clears the deprecated fields in legacy structure:
         * __u8         transceiver;
         * __u32        maxtxpkt;
         * __u32        maxrxpkt;
         */

        retval &= ethtool_convert_link_mode_to_legacy_u32(
                &legacy_settings->supported,
                link_ksettings->link_modes.supported);
        retval &= ethtool_convert_link_mode_to_legacy_u32(
                &legacy_settings->advertising,
                link_ksettings->link_modes.advertising);
        retval &= ethtool_convert_link_mode_to_legacy_u32(
                &legacy_settings->lp_advertising,
                link_ksettings->link_modes.lp_advertising);
        ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
        legacy_settings->duplex
                = link_ksettings->base.duplex;
        legacy_settings->port
                = link_ksettings->base.port;
        legacy_settings->phy_address
                = link_ksettings->base.phy_address;
        legacy_settings->autoneg
                = link_ksettings->base.autoneg;
        legacy_settings->mdio_support
                = link_ksettings->base.mdio_support;
        legacy_settings->eth_tp_mdix
                = link_ksettings->base.eth_tp_mdix;
        legacy_settings->eth_tp_mdix_ctrl
                = link_ksettings->base.eth_tp_mdix_ctrl;
        legacy_settings->transceiver
                = link_ksettings->base.transceiver;
        return retval;
}

/* number of 32-bit words to store the user's link mode bitmaps */
#define __ETHTOOL_LINK_MODE_MASK_NU32                   \
        DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)

/* layout of the struct passed from/to userland */
struct ethtool_link_usettings {
        struct ethtool_link_settings base;
        struct {
                __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
                __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
                __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
        } link_modes;
};

/* Internal kernel helper to query a device ethtool_link_settings. */
int __ethtool_get_link_ksettings(struct net_device *dev,
                                 struct ethtool_link_ksettings *link_ksettings)
{
        ASSERT_RTNL();

        if (!dev->ethtool_ops->get_link_ksettings)
                return -EOPNOTSUPP;

        if (!netif_device_present(dev))
                return -ENODEV;

        memset(link_ksettings, 0, sizeof(*link_ksettings));
        return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
}
EXPORT_SYMBOL(__ethtool_get_link_ksettings);

/* convert ethtool_link_usettings in user space to a kernel internal
 * ethtool_link_ksettings. return 0 on success, errno on error.
 */
static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
                                         const void __user *from)
{
        struct ethtool_link_usettings link_usettings;

        if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
                return -EFAULT;

        memcpy(&to->base, &link_usettings.base, sizeof(to->base));
        bitmap_from_arr32(to->link_modes.supported,
                          link_usettings.link_modes.supported,
                          __ETHTOOL_LINK_MODE_MASK_NBITS);
        bitmap_from_arr32(to->link_modes.advertising,
                          link_usettings.link_modes.advertising,
                          __ETHTOOL_LINK_MODE_MASK_NBITS);
        bitmap_from_arr32(to->link_modes.lp_advertising,
                          link_usettings.link_modes.lp_advertising,
                          __ETHTOOL_LINK_MODE_MASK_NBITS);

        return 0;
}

/* Check if the user is trying to change anything besides speed/duplex */
bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
{
        struct ethtool_link_settings base2 = {};

        base2.speed = cmd->base.speed;
        base2.port = PORT_OTHER;
        base2.duplex = cmd->base.duplex;
        base2.cmd = cmd->base.cmd;
        base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;

        return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
                bitmap_empty(cmd->link_modes.supported,
                             __ETHTOOL_LINK_MODE_MASK_NBITS) &&
                bitmap_empty(cmd->link_modes.lp_advertising,
                             __ETHTOOL_LINK_MODE_MASK_NBITS);
}

/* convert a kernel internal ethtool_link_ksettings to
 * ethtool_link_usettings in user space. return 0 on success, errno on
 * error.
 */
static int
store_link_ksettings_for_user(void __user *to,
                              const struct ethtool_link_ksettings *from)
{
        struct ethtool_link_usettings link_usettings;

        memcpy(&link_usettings, from, sizeof(link_usettings));
        bitmap_to_arr32(link_usettings.link_modes.supported,
                        from->link_modes.supported,
                        __ETHTOOL_LINK_MODE_MASK_NBITS);
        bitmap_to_arr32(link_usettings.link_modes.advertising,
                        from->link_modes.advertising,
                        __ETHTOOL_LINK_MODE_MASK_NBITS);
        bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
                        from->link_modes.lp_advertising,
                        __ETHTOOL_LINK_MODE_MASK_NBITS);

        if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
                return -EFAULT;

        return 0;
}

/* Query device for its ethtool_link_settings. */
static int ethtool_get_link_ksettings(struct net_device *dev,
                                      void __user *useraddr)
{
        int err = 0;
        struct ethtool_link_ksettings link_ksettings;

        ASSERT_RTNL();
        if (!dev->ethtool_ops->get_link_ksettings)
                return -EOPNOTSUPP;

        /* handle bitmap nbits handshake */
        if (copy_from_user(&link_ksettings.base, useraddr,
                           sizeof(link_ksettings.base)))
                return -EFAULT;

        if (__ETHTOOL_LINK_MODE_MASK_NU32
            != link_ksettings.base.link_mode_masks_nwords) {
                /* wrong link mode nbits requested */
                memset(&link_ksettings, 0, sizeof(link_ksettings));
                link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
                /* send back number of words required as negative val */
                compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
                                   "need too many bits for link modes!");
                link_ksettings.base.link_mode_masks_nwords
                        = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);

                /* copy the base fields back to user, not the link
                 * mode bitmaps
                 */
                if (copy_to_user(useraddr, &link_ksettings.base,
                                 sizeof(link_ksettings.base)))
                        return -EFAULT;

                return 0;
        }

        /* handshake successful: user/kernel agree on
         * link_mode_masks_nwords
         */

        memset(&link_ksettings, 0, sizeof(link_ksettings));
        err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
        if (err < 0)
                return err;

        /* make sure we tell the right values to user */
        link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
        link_ksettings.base.link_mode_masks_nwords
                = __ETHTOOL_LINK_MODE_MASK_NU32;
        link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
        link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
        link_ksettings.base.rate_matching = RATE_MATCH_NONE;

        return store_link_ksettings_for_user(useraddr, &link_ksettings);
}

/* Update device ethtool_link_settings. */
static int ethtool_set_link_ksettings(struct net_device *dev,
                                      void __user *useraddr)
{
        struct ethtool_link_ksettings link_ksettings = {};
        int err;

        ASSERT_RTNL();

        if (!dev->ethtool_ops->set_link_ksettings)
                return -EOPNOTSUPP;

        /* make sure nbits field has expected value */
        if (copy_from_user(&link_ksettings.base, useraddr,
                           sizeof(link_ksettings.base)))
                return -EFAULT;

        if (__ETHTOOL_LINK_MODE_MASK_NU32
            != link_ksettings.base.link_mode_masks_nwords)
                return -EINVAL;

        /* copy the whole structure, now that we know it has expected
         * format
         */
        err = load_link_ksettings_from_user(&link_ksettings, useraddr);
        if (err)
                return err;

        /* re-check nwords field, just in case */
        if (__ETHTOOL_LINK_MODE_MASK_NU32
            != link_ksettings.base.link_mode_masks_nwords)
                return -EINVAL;

        if (link_ksettings.base.master_slave_cfg ||
            link_ksettings.base.master_slave_state)
                return -EINVAL;

        err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
        if (err >= 0) {
                ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF);
                ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF);
        }
        return err;
}

int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
                                       const struct ethtool_link_ksettings *cmd,
                                       u32 *dev_speed, u8 *dev_duplex)
{
        u32 speed;
        u8 duplex;

        speed = cmd->base.speed;
        duplex = cmd->base.duplex;
        /* don't allow custom speed and duplex */
        if (!ethtool_validate_speed(speed) ||
            !ethtool_validate_duplex(duplex) ||
            !ethtool_virtdev_validate_cmd(cmd))
                return -EINVAL;
        *dev_speed = speed;
        *dev_duplex = duplex;

        return 0;
}
EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);

/* Query device for its ethtool_cmd settings.
 *
 * Backward compatibility note: for compatibility with legacy ethtool, this is
 * now implemented via get_link_ksettings. When driver reports higher link mode
 * bits, a kernel warning is logged once (with name of 1st driver/device) to
 * recommend user to upgrade ethtool, but the command is successful (only the
 * lower link mode bits reported back to user). Deprecated fields from
 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
 */
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_link_ksettings link_ksettings;
        struct ethtool_cmd cmd;
        int err;

        ASSERT_RTNL();
        if (!dev->ethtool_ops->get_link_ksettings)
                return -EOPNOTSUPP;

        if (dev->ethtool->module_fw_flash_in_progress)
                return -EBUSY;

        memset(&link_ksettings, 0, sizeof(link_ksettings));
        err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
        if (err < 0)
                return err;
        convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);

        /* send a sensible cmd tag back to user */
        cmd.cmd = ETHTOOL_GSET;

        if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
                return -EFAULT;

        return 0;
}

/* Update device link settings with given ethtool_cmd.
 *
 * Backward compatibility note: for compatibility with legacy ethtool, this is
 * now always implemented via set_link_settings. When user's request updates
 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
 * warning is logged once (with name of 1st driver/device) to recommend user to
 * upgrade ethtool, and the request is rejected.
 */
static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_link_ksettings link_ksettings;
        struct ethtool_cmd cmd;
        int ret;

        ASSERT_RTNL();

        if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
                return -EFAULT;
        if (!dev->ethtool_ops->set_link_ksettings)
                return -EOPNOTSUPP;

        if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
                return -EINVAL;
        link_ksettings.base.link_mode_masks_nwords =
                __ETHTOOL_LINK_MODE_MASK_NU32;
        ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
        if (ret >= 0) {
                ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF);
                ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF);
        }
        return ret;
}

static int
ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct device *parent = dev->dev.parent;

        rsp->info.cmd = ETHTOOL_GDRVINFO;
        strscpy(rsp->info.version, init_uts_ns.name.release,
                sizeof(rsp->info.version));
        if (ops->get_drvinfo) {
                ops->get_drvinfo(dev, &rsp->info);
                if (!rsp->info.bus_info[0] && parent)
                        strscpy(rsp->info.bus_info, dev_name(parent),
                                sizeof(rsp->info.bus_info));
                if (!rsp->info.driver[0] && parent && parent->driver)
                        strscpy(rsp->info.driver, parent->driver->name,
                                sizeof(rsp->info.driver));
        } else if (parent && parent->driver) {
                strscpy(rsp->info.bus_info, dev_name(parent),
                        sizeof(rsp->info.bus_info));
                strscpy(rsp->info.driver, parent->driver->name,
                        sizeof(rsp->info.driver));
        } else if (dev->rtnl_link_ops) {
                strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
                        sizeof(rsp->info.driver));
        } else {
                return -EOPNOTSUPP;
        }

        /*
         * this method of obtaining string set info is deprecated;
         * Use ETHTOOL_GSSET_INFO instead.
         */
        if (ops->get_sset_count) {
                int rc;

                rc = ops->get_sset_count(dev, ETH_SS_TEST);
                if (rc >= 0)
                        rsp->info.testinfo_len = rc;
                rc = ops->get_sset_count(dev, ETH_SS_STATS);
                if (rc >= 0)
                        rsp->info.n_stats = rc;
                rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
                if (rc >= 0)
                        rsp->info.n_priv_flags = rc;
        }
        if (ops->get_regs_len) {
                int ret = ops->get_regs_len(dev);

                if (ret > 0)
                        rsp->info.regdump_len = ret;
        }

        if (ops->get_eeprom_len)
                rsp->info.eedump_len = ops->get_eeprom_len(dev);

        if (!rsp->info.fw_version[0])
                rsp->devlink = netdev_to_devlink_get(dev);

        return 0;
}

static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
                                                    void __user *useraddr)
{
        struct ethtool_sset_info info;
        u64 sset_mask;
        int i, idx = 0, n_bits = 0, ret, rc;
        u32 *info_buf = NULL;

        if (copy_from_user(&info, useraddr, sizeof(info)))
                return -EFAULT;

        /* store copy of mask, because we zero struct later on */
        sset_mask = info.sset_mask;
        if (!sset_mask)
                return 0;

        /* calculate size of return buffer */
        n_bits = hweight64(sset_mask);

        memset(&info, 0, sizeof(info));
        info.cmd = ETHTOOL_GSSET_INFO;

        info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
        if (!info_buf)
                return -ENOMEM;

        /*
         * fill return buffer based on input bitmask and successful
         * get_sset_count return
         */
        for (i = 0; i < 64; i++) {
                if (!(sset_mask & (1ULL << i)))
                        continue;

                rc = __ethtool_get_sset_count(dev, i);
                if (rc >= 0) {
                        info.sset_mask |= (1ULL << i);
                        info_buf[idx++] = rc;
                }
        }

        ret = -EFAULT;
        if (copy_to_user(useraddr, &info, sizeof(info)))
                goto out;

        useraddr += offsetof(struct ethtool_sset_info, data);
        if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
                goto out;

        ret = 0;

out:
        kfree(info_buf);
        return ret;
}

static noinline_for_stack int
ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
                               const struct compat_ethtool_rxnfc __user *useraddr,
                               size_t size)
{
        struct compat_ethtool_rxnfc crxnfc = {};

        /* We expect there to be holes between fs.m_ext and
         * fs.ring_cookie and at the end of fs, but nowhere else.
         * On non-x86, no conversion should be needed.
         */
        BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
                     sizeof(struct compat_ethtool_rxnfc) !=
                     sizeof(struct ethtool_rxnfc));
        BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
                     sizeof(useraddr->fs.m_ext) !=
                     offsetof(struct ethtool_rxnfc, fs.m_ext) +
                     sizeof(rxnfc->fs.m_ext));
        BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
                     offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
                     offsetof(struct ethtool_rxnfc, fs.location) -
                     offsetof(struct ethtool_rxnfc, fs.ring_cookie));

        if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
                return -EFAULT;

        *rxnfc = (struct ethtool_rxnfc) {
                .cmd            = crxnfc.cmd,
                .flow_type      = crxnfc.flow_type,
                .data           = crxnfc.data,
                .fs             = {
                        .flow_type      = crxnfc.fs.flow_type,
                        .h_u            = crxnfc.fs.h_u,
                        .h_ext          = crxnfc.fs.h_ext,
                        .m_u            = crxnfc.fs.m_u,
                        .m_ext          = crxnfc.fs.m_ext,
                        .ring_cookie    = crxnfc.fs.ring_cookie,
                        .location       = crxnfc.fs.location,
                },
                .rule_cnt       = crxnfc.rule_cnt,
        };

        return 0;
}

static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
                                        const void __user *useraddr,
                                        size_t size)
{
        if (compat_need_64bit_alignment_fixup())
                return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);

        if (copy_from_user(rxnfc, useraddr, size))
                return -EFAULT;

        return 0;
}

static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
                                        const struct ethtool_rxnfc *rxnfc,
                                        size_t size, const u32 *rule_buf)
{
        struct compat_ethtool_rxnfc crxnfc;

        memset(&crxnfc, 0, sizeof(crxnfc));
        crxnfc = (struct compat_ethtool_rxnfc) {
                .cmd            = rxnfc->cmd,
                .flow_type      = rxnfc->flow_type,
                .data           = rxnfc->data,
                .fs             = {
                        .flow_type      = rxnfc->fs.flow_type,
                        .h_u            = rxnfc->fs.h_u,
                        .h_ext          = rxnfc->fs.h_ext,
                        .m_u            = rxnfc->fs.m_u,
                        .m_ext          = rxnfc->fs.m_ext,
                        .ring_cookie    = rxnfc->fs.ring_cookie,
                        .location       = rxnfc->fs.location,
                },
                .rule_cnt       = rxnfc->rule_cnt,
        };

        if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
                return -EFAULT;

        return 0;
}

static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
                                     size_t *info_size, void __user *useraddr)
{
        /* struct ethtool_rxnfc was originally defined for
         * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
         * members.  User-space might still be using that
         * definition.
         */
        if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
                *info_size = (offsetof(struct ethtool_rxnfc, data) +
                              sizeof(info->data));

        if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
                return -EFAULT;

        if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
                *info_size = sizeof(*info);
                if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
                        return -EFAULT;
                /* Since malicious users may modify the original data,
                 * we need to check whether FLOW_RSS is still requested.
                 */
                if (!(info->flow_type & FLOW_RSS))
                        return -EINVAL;
        }

        if (info->cmd != cmd)
                return -EINVAL;

        return 0;
}

static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
                                      const struct ethtool_rxnfc *rxnfc,
                                      size_t size, const u32 *rule_buf)
{
        int ret;

        if (compat_need_64bit_alignment_fixup()) {
                ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
                                                   rule_buf);
                useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
        } else {
                ret = copy_to_user(useraddr, rxnfc, size);
                useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
        }

        if (ret)
                return -EFAULT;

        if (rule_buf) {
                if (copy_to_user(useraddr, rule_buf,
                                 rxnfc->rule_cnt * sizeof(u32)))
                        return -EFAULT;
        }

        return 0;
}

static bool flow_type_hashable(u32 flow_type)
{
        switch (flow_type) {
        case ETHER_FLOW:
        case TCP_V4_FLOW:
        case UDP_V4_FLOW:
        case SCTP_V4_FLOW:
        case AH_ESP_V4_FLOW:
        case TCP_V6_FLOW:
        case UDP_V6_FLOW:
        case SCTP_V6_FLOW:
        case AH_ESP_V6_FLOW:
        case AH_V4_FLOW:
        case ESP_V4_FLOW:
        case AH_V6_FLOW:
        case ESP_V6_FLOW:
        case IPV4_FLOW:
        case IPV6_FLOW:
        case GTPU_V4_FLOW:
        case GTPU_V6_FLOW:
        case GTPC_V4_FLOW:
        case GTPC_V6_FLOW:
        case GTPC_TEID_V4_FLOW:
        case GTPC_TEID_V6_FLOW:
        case GTPU_EH_V4_FLOW:
        case GTPU_EH_V6_FLOW:
        case GTPU_UL_V4_FLOW:
        case GTPU_UL_V6_FLOW:
        case GTPU_DL_V4_FLOW:
        case GTPU_DL_V6_FLOW:
                return true;
        }

        return false;
}

static bool flow_type_v6(u32 flow_type)
{
        switch (flow_type) {
        case TCP_V6_FLOW:
        case UDP_V6_FLOW:
        case SCTP_V6_FLOW:
        case AH_ESP_V6_FLOW:
        case AH_V6_FLOW:
        case ESP_V6_FLOW:
        case IPV6_FLOW:
        case GTPU_V6_FLOW:
        case GTPC_V6_FLOW:
        case GTPC_TEID_V6_FLOW:
        case GTPU_EH_V6_FLOW:
        case GTPU_UL_V6_FLOW:
        case GTPU_DL_V6_FLOW:
                return true;
        }

        return false;
}

/* When adding a new type, update the assert and, if it's hashable, add it to
 * the flow_type_hashable switch case.
 */
static_assert(GTPU_DL_V6_FLOW + 1 == __FLOW_TYPE_COUNT);

static int ethtool_check_xfrm_rxfh(u32 input_xfrm, u64 rxfh)
{
        /* Sanity check: if symmetric-xor/symmetric-or-xor is set, then:
         * 1 - no other fields besides IP src/dst and/or L4 src/dst are set
         * 2 - If src is set, dst must also be set
         */
        if ((input_xfrm != RXH_XFRM_NO_CHANGE &&
             input_xfrm & (RXH_XFRM_SYM_XOR | RXH_XFRM_SYM_OR_XOR)) &&
            !ethtool_rxfh_config_is_sym(rxfh))
                return -EINVAL;

        return 0;
}

static int ethtool_check_flow_types(struct net_device *dev, u32 input_xfrm)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        int err;
        u32 i;

        if (!input_xfrm || input_xfrm == RXH_XFRM_NO_CHANGE)
                return 0;

        for (i = 0; i < __FLOW_TYPE_COUNT; i++) {
                struct ethtool_rxfh_fields fields = {
                        .flow_type      = i,
                };

                if (!flow_type_hashable(i))
                        continue;

                if (ops->get_rxfh_fields(dev, &fields))
                        continue;

                err = ethtool_check_xfrm_rxfh(input_xfrm, fields.data);
                if (err)
                        return err;
        }

        return 0;
}

static noinline_for_stack int
ethtool_set_rxfh_fields(struct net_device *dev, u32 cmd, void __user *useraddr)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct ethtool_rxfh_fields fields = {};
        struct ethtool_rxnfc info;
        size_t info_size = sizeof(info);
        int rc;

        if (!ops->set_rxfh_fields)
                return -EOPNOTSUPP;

        rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
        if (rc)
                return rc;

        if (info.data & RXH_IP6_FL && !flow_type_v6(info.flow_type))
                return -EINVAL;

        if (info.flow_type & FLOW_RSS && info.rss_context &&
            !ops->rxfh_per_ctx_fields)
                return -EINVAL;

        mutex_lock(&dev->ethtool->rss_lock);
        if (ops->get_rxfh) {
                struct ethtool_rxfh_param rxfh = {};

                rc = ops->get_rxfh(dev, &rxfh);
                if (rc)
                        goto exit_unlock;

                rc = ethtool_check_xfrm_rxfh(rxfh.input_xfrm, info.data);
                if (rc)
                        goto exit_unlock;
        }

        fields.data = info.data;
        fields.flow_type = info.flow_type & ~FLOW_RSS;
        if (info.flow_type & FLOW_RSS)
                fields.rss_context = info.rss_context;

        rc = ops->set_rxfh_fields(dev, &fields, NULL);
exit_unlock:
        mutex_unlock(&dev->ethtool->rss_lock);
        if (rc)
                return rc;

        ethtool_rss_notify(dev, ETHTOOL_MSG_RSS_NTF, fields.rss_context);
        return 0;
}

static noinline_for_stack int
ethtool_get_rxfh_fields(struct net_device *dev, u32 cmd, void __user *useraddr)
{
        struct ethtool_rxnfc info;
        size_t info_size = sizeof(info);
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct ethtool_rxfh_fields fields = {};
        int ret;

        if (!ops->get_rxfh_fields)
                return -EOPNOTSUPP;

        ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
        if (ret)
                return ret;

        if (info.flow_type & FLOW_RSS && info.rss_context &&
            !ops->rxfh_per_ctx_fields)
                return -EINVAL;

        fields.flow_type = info.flow_type & ~FLOW_RSS;
        if (info.flow_type & FLOW_RSS)
                fields.rss_context = info.rss_context;

        mutex_lock(&dev->ethtool->rss_lock);
        ret = ops->get_rxfh_fields(dev, &fields);
        mutex_unlock(&dev->ethtool->rss_lock);
        if (ret < 0)
                return ret;

        info.data = fields.data;

        return ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL);
}

static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
                                                u32 cmd, void __user *useraddr)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct ethtool_rxnfc info;
        size_t info_size = sizeof(info);
        int rc;

        if (!ops->set_rxnfc)
                return -EOPNOTSUPP;

        rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
        if (rc)
                return rc;

        if (cmd == ETHTOOL_SRXCLSRLINS && info.fs.flow_type & FLOW_RSS) {
                /* Nonzero ring with RSS only makes sense
                 * if NIC adds them together
                 */
                if (!ops->cap_rss_rxnfc_adds &&
                    ethtool_get_flow_spec_ring(info.fs.ring_cookie))
                        return -EINVAL;

                if (info.rss_context &&
                    !xa_load(&dev->ethtool->rss_ctx, info.rss_context))
                        return -EINVAL;
        }

        rc = ops->set_rxnfc(dev, &info);
        if (rc)
                return rc;

        if (cmd == ETHTOOL_SRXCLSRLINS &&
            ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
                return -EFAULT;

        return 0;
}

static noinline_for_stack int ethtool_get_rxrings(struct net_device *dev,
                                                  u32 cmd,
                                                  void __user *useraddr)
{
        struct ethtool_rxnfc info;
        size_t info_size;
        int ret;

        info_size = sizeof(info);
        ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
        if (ret)
                return ret;

        ret = ethtool_get_rx_ring_count(dev);
        if (ret < 0)
                return ret;

        info.data = ret;

        return ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL);
}

static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
                                                u32 cmd, void __user *useraddr)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct ethtool_rxnfc info;
        void *rule_buf = NULL;
        size_t info_size;
        int ret;

        if (!ops->get_rxnfc)
                return -EOPNOTSUPP;

        info_size = sizeof(info);
        ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
        if (ret)
                return ret;

        if (info.cmd == ETHTOOL_GRXCLSRLALL) {
                if (info.rule_cnt > 0) {
                        if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
                                rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
                                                   GFP_USER);
                        if (!rule_buf)
                                return -ENOMEM;
                }
        }

        ret = ops->get_rxnfc(dev, &info, rule_buf);
        if (ret < 0)
                goto err_out;

        ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
err_out:
        kfree(rule_buf);

        return ret;
}

static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
                                       int num_rx_rings,
                                       u32 size)
{
        int i;

        if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
                return -EFAULT;

        /* Validate ring indices */
        for (i = 0; i < size; i++)
                if (indir[i] >= num_rx_rings)
                        return -EINVAL;

        return 0;
}

u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;

void netdev_rss_key_fill(void *buffer, size_t len)
{
        BUG_ON(len > sizeof(netdev_rss_key));
        net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
        memcpy(buffer, netdev_rss_key, len);
}
EXPORT_SYMBOL(netdev_rss_key_fill);

static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
                                                     void __user *useraddr)
{
        struct ethtool_rxfh_param rxfh = {};
        u32 user_size;
        int ret;

        if (!dev->ethtool_ops->get_rxfh_indir_size ||
            !dev->ethtool_ops->get_rxfh)
                return -EOPNOTSUPP;
        rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
        if (rxfh.indir_size == 0)
                return -EOPNOTSUPP;

        if (copy_from_user(&user_size,
                           useraddr + offsetof(struct ethtool_rxfh_indir, size),
                           sizeof(user_size)))
                return -EFAULT;

        if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
                         &rxfh.indir_size, sizeof(rxfh.indir_size)))
                return -EFAULT;

        /* If the user buffer size is 0, this is just a query for the
         * device table size.  Otherwise, if it's smaller than the
         * device table size it's an error.
         */
        if (user_size < rxfh.indir_size)
                return user_size == 0 ? 0 : -EINVAL;

        rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
        if (!rxfh.indir)
                return -ENOMEM;

        mutex_lock(&dev->ethtool->rss_lock);
        ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
        mutex_unlock(&dev->ethtool->rss_lock);
        if (ret)
                goto out;
        if (copy_to_user(useraddr +
                         offsetof(struct ethtool_rxfh_indir, ring_index[0]),
                         rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
                ret = -EFAULT;

out:
        kfree(rxfh.indir);
        return ret;
}

static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
                                                     void __user *useraddr)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct ethtool_rxfh_param rxfh_dev = {};
        struct netlink_ext_ack *extack = NULL;
        int num_rx_rings;
        u32 user_size, i;
        int ret;
        u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);

        if (!ops->get_rxfh_indir_size || !ops->set_rxfh)
                return -EOPNOTSUPP;

        rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
        if (rxfh_dev.indir_size == 0)
                return -EOPNOTSUPP;

        if (copy_from_user(&user_size,
                           useraddr + offsetof(struct ethtool_rxfh_indir, size),
                           sizeof(user_size)))
                return -EFAULT;

        if (user_size != 0 && user_size != rxfh_dev.indir_size)
                return -EINVAL;

        rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
                                 sizeof(rxfh_dev.indir[0]), GFP_USER);
        if (!rxfh_dev.indir)
                return -ENOMEM;

        num_rx_rings = ethtool_get_rx_ring_count(dev);
        if (num_rx_rings < 0) {
                ret = num_rx_rings;
                goto out;
        }

        if (user_size == 0) {
                u32 *indir = rxfh_dev.indir;

                for (i = 0; i < rxfh_dev.indir_size; i++)
                        indir[i] = ethtool_rxfh_indir_default(i, num_rx_rings);
        } else {
                ret = ethtool_copy_validate_indir(rxfh_dev.indir,
                                                  useraddr + ringidx_offset,
                                                  num_rx_rings,
                                                  rxfh_dev.indir_size);
                if (ret)
                        goto out;
        }

        rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;

        mutex_lock(&dev->ethtool->rss_lock);
        ret = ops->set_rxfh(dev, &rxfh_dev, extack);
        if (ret)
                goto out_unlock;

        /* indicate whether rxfh was set to default */
        if (user_size == 0)
                dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
        else
                dev->priv_flags |= IFF_RXFH_CONFIGURED;

out_unlock:
        mutex_unlock(&dev->ethtool->rss_lock);
out:
        kfree(rxfh_dev.indir);
        return ret;
}

static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
                                               void __user *useraddr)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct ethtool_rxfh_param rxfh_dev = {};
        u32 user_indir_size, user_key_size;
        struct ethtool_rxfh_context *ctx;
        struct ethtool_rxfh rxfh;
        u32 indir_bytes;
        u8 *rss_config;
        u32 total_size;
        int ret;

        if (!ops->get_rxfh)
                return -EOPNOTSUPP;

        if (ops->get_rxfh_indir_size)
                rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
        if (ops->get_rxfh_key_size)
                rxfh_dev.key_size = ops->get_rxfh_key_size(dev);

        if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
                return -EFAULT;
        user_indir_size = rxfh.indir_size;
        user_key_size = rxfh.key_size;

        /* Check that reserved fields are 0 for now */
        if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
                return -EINVAL;
        /* Most drivers don't handle rss_context, check it's 0 as well */
        if (rxfh.rss_context && !ops->create_rxfh_context)
                return -EOPNOTSUPP;

        rxfh.indir_size = rxfh_dev.indir_size;
        rxfh.key_size = rxfh_dev.key_size;
        if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
                return -EFAULT;

        if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
            (user_key_size && user_key_size != rxfh_dev.key_size))
                return -EINVAL;

        indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
        total_size = indir_bytes + user_key_size;
        rss_config = kzalloc(total_size, GFP_USER);
        if (!rss_config)
                return -ENOMEM;

        if (user_indir_size)
                rxfh_dev.indir = (u32 *)rss_config;

        if (user_key_size)
                rxfh_dev.key = rss_config + indir_bytes;

        mutex_lock(&dev->ethtool->rss_lock);
        if (rxfh.rss_context) {
                ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
                if (!ctx) {
                        ret = -ENOENT;
                        goto out;
                }
                if (rxfh_dev.indir)
                        memcpy(rxfh_dev.indir, ethtool_rxfh_context_indir(ctx),
                               indir_bytes);
                if (!ops->rxfh_per_ctx_key) {
                        rxfh_dev.key_size = 0;
                } else {
                        if (rxfh_dev.key)
                                memcpy(rxfh_dev.key,
                                       ethtool_rxfh_context_key(ctx),
                                       user_key_size);
                        rxfh_dev.hfunc = ctx->hfunc;
                }
                rxfh_dev.input_xfrm = ctx->input_xfrm;
                ret = 0;
        } else {
                ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
                if (ret)
                        goto out;
        }

        if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
                         &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
                ret = -EFAULT;
        } else if (copy_to_user(useraddr +
                                offsetof(struct ethtool_rxfh, input_xfrm),
                                &rxfh_dev.input_xfrm,
                                sizeof(rxfh.input_xfrm))) {
                ret = -EFAULT;
        } else if (copy_to_user(useraddr +
                                offsetof(struct ethtool_rxfh, key_size),
                                &rxfh_dev.key_size,
                                sizeof(rxfh.key_size))) {
                ret = -EFAULT;
        } else if (copy_to_user(useraddr +
                              offsetof(struct ethtool_rxfh, rss_config[0]),
                              rss_config, total_size)) {
                ret = -EFAULT;
        }
out:
        mutex_unlock(&dev->ethtool->rss_lock);
        kfree(rss_config);

        return ret;
}

static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
                                               void __user *useraddr)
{
        u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
        const struct ethtool_ops *ops = dev->ethtool_ops;
        u32 dev_indir_size = 0, dev_key_size = 0, i;
        u32 user_indir_len = 0, indir_bytes = 0;
        struct ethtool_rxfh_param rxfh_dev = {};
        struct ethtool_rxfh_context *ctx = NULL;
        struct netlink_ext_ack *extack = NULL;
        struct ethtool_rxfh rxfh;
        bool create = false;
        int num_rx_rings;
        u8 *rss_config;
        int ntf = 0;
        int ret;

        if (!ops->set_rxfh)
                return -EOPNOTSUPP;

        if (ops->get_rxfh_indir_size)
                dev_indir_size = ops->get_rxfh_indir_size(dev);
        if (ops->get_rxfh_key_size)
                dev_key_size = ops->get_rxfh_key_size(dev);

        if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
                return -EFAULT;

        /* Check that reserved fields are 0 for now */
        if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
                return -EINVAL;
        /* Most drivers don't handle rss_context, check it's 0 as well */
        if (rxfh.rss_context && !ops->create_rxfh_context)
                return -EOPNOTSUPP;
        /* Check input data transformation capabilities */
        if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
            rxfh.input_xfrm != RXH_XFRM_SYM_OR_XOR &&
            rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
                return -EINVAL;
        if (rxfh.input_xfrm != RXH_XFRM_NO_CHANGE &&
            rxfh.input_xfrm & ~ops->supported_input_xfrm)
                return -EOPNOTSUPP;
        create = rxfh.rss_context == ETH_RXFH_CONTEXT_ALLOC;

        if ((rxfh.indir_size &&
             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
             rxfh.indir_size != dev_indir_size) ||
            (rxfh.key_size && rxfh.key_size != dev_key_size))
                return -EINVAL;

        /* Must request at least one change: indir size, hash key, function
         * or input transformation.
         * There's no need for any of it in case of context creation.
         */
        if (!create &&
            (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
             rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
             rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
                return -EINVAL;

        indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);

        /* Check settings which may be global rather than per RSS-context */
        if (rxfh.rss_context && !ops->rxfh_per_ctx_key)
                if (rxfh.key_size ||
                    (rxfh.hfunc && rxfh.hfunc != ETH_RSS_HASH_NO_CHANGE) ||
                    (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_NO_CHANGE))
                        return -EOPNOTSUPP;

        rss_config = kzalloc(indir_bytes + dev_key_size, GFP_USER);
        if (!rss_config)
                return -ENOMEM;

        num_rx_rings = ethtool_get_rx_ring_count(dev);
        if (num_rx_rings < 0) {
                ret = num_rx_rings;
                goto out_free;
        }

        /* rxfh.indir_size == 0 means reset the indir table to default (master
         * context) or delete the context (other RSS contexts).
         * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
         */
        if (rxfh.indir_size &&
            rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
                user_indir_len = indir_bytes;
                rxfh_dev.indir = (u32 *)rss_config;
                rxfh_dev.indir_size = dev_indir_size;
                ret = ethtool_copy_validate_indir(rxfh_dev.indir,
                                                  useraddr + rss_cfg_offset,
                                                  num_rx_rings,
                                                  rxfh.indir_size);
                if (ret)
                        goto out_free;
        } else if (rxfh.indir_size == 0) {
                if (rxfh.rss_context == 0) {
                        u32 *indir;

                        rxfh_dev.indir = (u32 *)rss_config;
                        rxfh_dev.indir_size = dev_indir_size;
                        indir = rxfh_dev.indir;
                        for (i = 0; i < dev_indir_size; i++)
                                indir[i] =
                                        ethtool_rxfh_indir_default(i, num_rx_rings);
                } else {
                        rxfh_dev.rss_delete = true;
                }
        }

        if (rxfh.key_size) {
                rxfh_dev.key_size = dev_key_size;
                rxfh_dev.key = rss_config + indir_bytes;
                if (copy_from_user(rxfh_dev.key,
                                   useraddr + rss_cfg_offset + user_indir_len,
                                   rxfh.key_size)) {
                        ret = -EFAULT;
                        goto out_free;
                }
        }

        mutex_lock(&dev->ethtool->rss_lock);

        ret = ethtool_check_flow_types(dev, rxfh.input_xfrm);
        if (ret)
                goto out_unlock;

        if (rxfh.rss_context && rxfh_dev.rss_delete) {
                ret = ethtool_check_rss_ctx_busy(dev, rxfh.rss_context);
                if (ret)
                        goto out_unlock;
        }

        if (create) {
                u32 limit, ctx_id;

                if (rxfh_dev.rss_delete) {
                        ret = -EINVAL;
                        goto out_unlock;
                }
                ctx = ethtool_rxfh_ctx_alloc(ops, dev_indir_size, dev_key_size);
                if (!ctx) {
                        ret = -ENOMEM;
                        goto out_unlock;
                }

                limit = ops->rxfh_max_num_contexts ?: U32_MAX;
                ret = xa_alloc(&dev->ethtool->rss_ctx, &ctx_id, ctx,
                               XA_LIMIT(1, limit - 1), GFP_KERNEL_ACCOUNT);
                if (ret < 0) {
                        kfree(ctx);
                        goto out_unlock;
                }
                WARN_ON(!ctx_id); /* can't happen */
                rxfh.rss_context = ctx_id;
        } else if (rxfh.rss_context) {
                ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
                if (!ctx) {
                        ret = -ENOENT;
                        goto out_unlock;
                }
        }
        rxfh_dev.hfunc = rxfh.hfunc;
        rxfh_dev.rss_context = rxfh.rss_context;
        rxfh_dev.input_xfrm = rxfh.input_xfrm;

        if (!rxfh.rss_context) {
                ntf = ETHTOOL_MSG_RSS_NTF;
                ret = ops->set_rxfh(dev, &rxfh_dev, extack);
        } else if (create) {
                ntf = ETHTOOL_MSG_RSS_CREATE_NTF;
                ret = ops->create_rxfh_context(dev, ctx, &rxfh_dev, extack);
                /* Make sure driver populates defaults */
                WARN_ON_ONCE(!ret && !rxfh_dev.key && ops->rxfh_per_ctx_key &&
                             !memchr_inv(ethtool_rxfh_context_key(ctx), 0,
                                         ctx->key_size));
        } else if (rxfh_dev.rss_delete) {
                ntf = ETHTOOL_MSG_RSS_DELETE_NTF;
                ret = ops->remove_rxfh_context(dev, ctx, rxfh.rss_context,
                                               extack);
        } else {
                ntf = ETHTOOL_MSG_RSS_NTF;
                ret = ops->modify_rxfh_context(dev, ctx, &rxfh_dev, extack);
        }
        if (ret) {
                ntf = 0;
                if (create) {
                        /* failed to create, free our new tracking entry */
                        xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
                        kfree(ctx);
                }
                goto out_unlock;
        }

        if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
                         &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
                ret = -EFAULT;

        if (!rxfh_dev.rss_context) {
                /* indicate whether rxfh was set to default */
                if (rxfh.indir_size == 0)
                        dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
                else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
                        dev->priv_flags |= IFF_RXFH_CONFIGURED;
        }
        /* Update rss_ctx tracking */
        if (rxfh_dev.rss_delete) {
                WARN_ON(xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context) != ctx);
                kfree(ctx);
        } else if (ctx) {
                if (rxfh_dev.indir) {
                        for (i = 0; i < dev_indir_size; i++)
                                ethtool_rxfh_context_indir(ctx)[i] = rxfh_dev.indir[i];
                        ctx->indir_configured =
                                rxfh.indir_size &&
                                rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE;
                }
                if (rxfh_dev.key) {
                        memcpy(ethtool_rxfh_context_key(ctx), rxfh_dev.key,
                               dev_key_size);
                        ctx->key_configured = !!rxfh.key_size;
                }
                if (rxfh_dev.hfunc != ETH_RSS_HASH_NO_CHANGE)
                        ctx->hfunc = rxfh_dev.hfunc;
                if (rxfh_dev.input_xfrm != RXH_XFRM_NO_CHANGE)
                        ctx->input_xfrm = rxfh_dev.input_xfrm;
        }

out_unlock:
        mutex_unlock(&dev->ethtool->rss_lock);
out_free:
        kfree(rss_config);
        if (ntf)
                ethtool_rss_notify(dev, ntf, rxfh.rss_context);
        return ret;
}

static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_regs regs;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        void *regbuf;
        int reglen, ret;

        if (!ops->get_regs || !ops->get_regs_len)
                return -EOPNOTSUPP;

        if (copy_from_user(&regs, useraddr, sizeof(regs)))
                return -EFAULT;

        reglen = ops->get_regs_len(dev);
        if (reglen <= 0)
                return reglen;

        if (regs.len > reglen)
                regs.len = reglen;

        regbuf = vzalloc(reglen);
        if (!regbuf)
                return -ENOMEM;

        if (regs.len < reglen)
                reglen = regs.len;

        ops->get_regs(dev, &regs, regbuf);

        ret = -EFAULT;
        if (copy_to_user(useraddr, &regs, sizeof(regs)))
                goto out;
        useraddr += offsetof(struct ethtool_regs, data);
        if (copy_to_user(useraddr, regbuf, reglen))
                goto out;
        ret = 0;

 out:
        vfree(regbuf);
        return ret;
}

static int ethtool_reset(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_value reset;
        int ret;

        if (!dev->ethtool_ops->reset)
                return -EOPNOTSUPP;

        if (dev->ethtool->module_fw_flash_in_progress)
                return -EBUSY;

        if (copy_from_user(&reset, useraddr, sizeof(reset)))
                return -EFAULT;

        ret = dev->ethtool_ops->reset(dev, &reset.data);
        if (ret)
                return ret;

        if (copy_to_user(useraddr, &reset, sizeof(reset)))
                return -EFAULT;
        return 0;
}

static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_wolinfo wol;

        if (!dev->ethtool_ops->get_wol)
                return -EOPNOTSUPP;

        memset(&wol, 0, sizeof(struct ethtool_wolinfo));
        wol.cmd = ETHTOOL_GWOL;
        dev->ethtool_ops->get_wol(dev, &wol);

        if (copy_to_user(useraddr, &wol, sizeof(wol)))
                return -EFAULT;
        return 0;
}

static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_wolinfo wol, cur_wol;
        int ret;

        if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
                return -EOPNOTSUPP;

        memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
        cur_wol.cmd = ETHTOOL_GWOL;
        dev->ethtool_ops->get_wol(dev, &cur_wol);

        if (copy_from_user(&wol, useraddr, sizeof(wol)))
                return -EFAULT;

        if (wol.wolopts & ~cur_wol.supported)
                return -EINVAL;

        if (wol.wolopts == cur_wol.wolopts &&
            !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
                return 0;

        ret = dev->ethtool_ops->set_wol(dev, &wol);
        if (ret)
                return ret;

        dev->ethtool->wol_enabled = !!wol.wolopts;
        ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF);

        return 0;
}

static void eee_to_keee(struct ethtool_keee *keee,
                        const struct ethtool_eee *eee)
{
        memset(keee, 0, sizeof(*keee));

        keee->eee_enabled = eee->eee_enabled;
        keee->tx_lpi_enabled = eee->tx_lpi_enabled;
        keee->tx_lpi_timer = eee->tx_lpi_timer;

        ethtool_convert_legacy_u32_to_link_mode(keee->advertised,
                                                eee->advertised);
}

static void keee_to_eee(struct ethtool_eee *eee,
                        const struct ethtool_keee *keee)
{
        bool overflow;

        memset(eee, 0, sizeof(*eee));

        eee->eee_active = keee->eee_active;
        eee->eee_enabled = keee->eee_enabled;
        eee->tx_lpi_enabled = keee->tx_lpi_enabled;
        eee->tx_lpi_timer = keee->tx_lpi_timer;

        overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported,
                                                            keee->supported);
        ethtool_convert_link_mode_to_legacy_u32(&eee->advertised,
                                                keee->advertised);
        ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised,
                                                keee->lp_advertised);
        if (overflow)
                pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n");
}

static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_keee keee;
        struct ethtool_eee eee;
        int rc;

        if (!dev->ethtool_ops->get_eee)
                return -EOPNOTSUPP;

        memset(&keee, 0, sizeof(keee));
        rc = dev->ethtool_ops->get_eee(dev, &keee);
        if (rc)
                return rc;

        keee_to_eee(&eee, &keee);
        if (copy_to_user(useraddr, &eee, sizeof(eee)))
                return -EFAULT;

        return 0;
}

static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_keee keee;
        struct ethtool_eee eee;
        int ret;

        if (!dev->ethtool_ops->set_eee)
                return -EOPNOTSUPP;

        if (copy_from_user(&eee, useraddr, sizeof(eee)))
                return -EFAULT;

        eee_to_keee(&keee, &eee);
        ret = dev->ethtool_ops->set_eee(dev, &keee);
        if (!ret)
                ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF);
        return ret;
}

static int ethtool_nway_reset(struct net_device *dev)
{
        if (!dev->ethtool_ops->nway_reset)
                return -EOPNOTSUPP;

        return dev->ethtool_ops->nway_reset(dev);
}

static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
        int link = __ethtool_get_link(dev);

        if (link < 0)
                return link;

        edata.data = link;
        if (copy_to_user(useraddr, &edata, sizeof(edata)))
                return -EFAULT;
        return 0;
}

static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
                                  int (*getter)(struct net_device *,
                                                struct ethtool_eeprom *, u8 *),
                                  u32 total_len)
{
        struct ethtool_eeprom eeprom;
        void __user *userbuf = useraddr + sizeof(eeprom);
        u32 bytes_remaining;
        u8 *data;
        int ret = 0;

        if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
                return -EFAULT;

        /* Check for wrap and zero */
        if (eeprom.offset + eeprom.len <= eeprom.offset)
                return -EINVAL;

        /* Check for exceeding total eeprom len */
        if (eeprom.offset + eeprom.len > total_len)
                return -EINVAL;

        data = kzalloc(PAGE_SIZE, GFP_USER);
        if (!data)
                return -ENOMEM;

        bytes_remaining = eeprom.len;
        while (bytes_remaining > 0) {
                eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

                ret = getter(dev, &eeprom, data);
                if (ret)
                        break;
                if (!eeprom.len) {
                        ret = -EIO;
                        break;
                }
                if (copy_to_user(userbuf, data, eeprom.len)) {
                        ret = -EFAULT;
                        break;
                }
                userbuf += eeprom.len;
                eeprom.offset += eeprom.len;
                bytes_remaining -= eeprom.len;
        }

        eeprom.len = userbuf - (useraddr + sizeof(eeprom));
        eeprom.offset -= eeprom.len;
        if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
                ret = -EFAULT;

        kfree(data);
        return ret;
}

static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;

        if (!ops->get_eeprom || !ops->get_eeprom_len ||
            !ops->get_eeprom_len(dev))
                return -EOPNOTSUPP;

        return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
                                      ops->get_eeprom_len(dev));
}

static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_eeprom eeprom;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        void __user *userbuf = useraddr + sizeof(eeprom);
        u32 bytes_remaining;
        u8 *data;
        int ret = 0;

        if (!ops->set_eeprom || !ops->get_eeprom_len ||
            !ops->get_eeprom_len(dev))
                return -EOPNOTSUPP;

        if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
                return -EFAULT;

        /* Check for wrap and zero */
        if (eeprom.offset + eeprom.len <= eeprom.offset)
                return -EINVAL;

        /* Check for exceeding total eeprom len */
        if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
                return -EINVAL;

        data = kzalloc(PAGE_SIZE, GFP_USER);
        if (!data)
                return -ENOMEM;

        bytes_remaining = eeprom.len;
        while (bytes_remaining > 0) {
                eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);

                if (copy_from_user(data, userbuf, eeprom.len)) {
                        ret = -EFAULT;
                        break;
                }
                ret = ops->set_eeprom(dev, &eeprom, data);
                if (ret)
                        break;
                userbuf += eeprom.len;
                eeprom.offset += eeprom.len;
                bytes_remaining -= eeprom.len;
        }

        kfree(data);
        return ret;
}

static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
                                                   void __user *useraddr)
{
        struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
        struct kernel_ethtool_coalesce kernel_coalesce = {};
        int ret;

        if (!dev->ethtool_ops->get_coalesce)
                return -EOPNOTSUPP;

        ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
                                             NULL);
        if (ret)
                return ret;

        if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
                return -EFAULT;
        return 0;
}

static bool
ethtool_set_coalesce_supported(struct net_device *dev,
                               struct ethtool_coalesce *coalesce)
{
        u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
        u32 nonzero_params = 0;

        if (coalesce->rx_coalesce_usecs)
                nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
        if (coalesce->rx_max_coalesced_frames)
                nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
        if (coalesce->rx_coalesce_usecs_irq)
                nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
        if (coalesce->rx_max_coalesced_frames_irq)
                nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
        if (coalesce->tx_coalesce_usecs)
                nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
        if (coalesce->tx_max_coalesced_frames)
                nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
        if (coalesce->tx_coalesce_usecs_irq)
                nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
        if (coalesce->tx_max_coalesced_frames_irq)
                nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
        if (coalesce->stats_block_coalesce_usecs)
                nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
        if (coalesce->use_adaptive_rx_coalesce)
                nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
        if (coalesce->use_adaptive_tx_coalesce)
                nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
        if (coalesce->pkt_rate_low)
                nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
        if (coalesce->rx_coalesce_usecs_low)
                nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
        if (coalesce->rx_max_coalesced_frames_low)
                nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
        if (coalesce->tx_coalesce_usecs_low)
                nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
        if (coalesce->tx_max_coalesced_frames_low)
                nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
        if (coalesce->pkt_rate_high)
                nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
        if (coalesce->rx_coalesce_usecs_high)
                nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
        if (coalesce->rx_max_coalesced_frames_high)
                nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
        if (coalesce->tx_coalesce_usecs_high)
                nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
        if (coalesce->tx_max_coalesced_frames_high)
                nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
        if (coalesce->rate_sample_interval)
                nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;

        return (supported_params & nonzero_params) == nonzero_params;
}

static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
                                                   void __user *useraddr)
{
        struct kernel_ethtool_coalesce kernel_coalesce = {};
        struct ethtool_coalesce coalesce;
        int ret;

        if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
                return -EOPNOTSUPP;

        ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
                                             NULL);
        if (ret)
                return ret;

        if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
                return -EFAULT;

        if (!ethtool_set_coalesce_supported(dev, &coalesce))
                return -EOPNOTSUPP;

        ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
                                             NULL);
        if (!ret)
                ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF);
        return ret;
}

static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
        struct kernel_ethtool_ringparam kernel_ringparam = {};

        if (!dev->ethtool_ops->get_ringparam)
                return -EOPNOTSUPP;

        dev->ethtool_ops->get_ringparam(dev, &ringparam,
                                        &kernel_ringparam, NULL);

        if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
                return -EFAULT;
        return 0;
}

static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
{
        struct kernel_ethtool_ringparam kernel_ringparam;
        struct ethtool_ringparam ringparam, max;
        int ret;

        if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
                return -EOPNOTSUPP;

        if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
                return -EFAULT;

        ethtool_ringparam_get_cfg(dev, &max, &kernel_ringparam, NULL);

        /* ensure new ring parameters are within the maximums */
        if (ringparam.rx_pending > max.rx_max_pending ||
            ringparam.rx_mini_pending > max.rx_mini_max_pending ||
            ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
            ringparam.tx_pending > max.tx_max_pending)
                return -EINVAL;

        ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
                                              &kernel_ringparam, NULL);
        if (!ret)
                ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF);
        return ret;
}

static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
                                                   void __user *useraddr)
{
        struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };

        if (!dev->ethtool_ops->get_channels)
                return -EOPNOTSUPP;

        dev->ethtool_ops->get_channels(dev, &channels);

        if (copy_to_user(useraddr, &channels, sizeof(channels)))
                return -EFAULT;
        return 0;
}

static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
                                                   void __user *useraddr)
{
        struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
        u16 from_channel, to_channel;
        unsigned int i;
        int ret;

        if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
                return -EOPNOTSUPP;

        if (copy_from_user(&channels, useraddr, sizeof(channels)))
                return -EFAULT;

        dev->ethtool_ops->get_channels(dev, &curr);

        if (channels.rx_count == curr.rx_count &&
            channels.tx_count == curr.tx_count &&
            channels.combined_count == curr.combined_count &&
            channels.other_count == curr.other_count)
                return 0;

        /* ensure new counts are within the maximums */
        if (channels.rx_count > curr.max_rx ||
            channels.tx_count > curr.max_tx ||
            channels.combined_count > curr.max_combined ||
            channels.other_count > curr.max_other)
                return -EINVAL;

        /* ensure there is at least one RX and one TX channel */
        if (!channels.combined_count &&
            (!channels.rx_count || !channels.tx_count))
                return -EINVAL;

        ret = ethtool_check_max_channel(dev, channels, NULL);
        if (ret)
                return ret;

        /* Disabling channels, query zero-copy AF_XDP sockets */
        from_channel = channels.combined_count +
                min(channels.rx_count, channels.tx_count);
        to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
        for (i = from_channel; i < to_channel; i++)
                if (xsk_get_pool_from_qid(dev, i))
                        return -EINVAL;

        ret = dev->ethtool_ops->set_channels(dev, &channels);
        if (!ret)
                ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF);
        return ret;
}

static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };

        if (!dev->ethtool_ops->get_pauseparam)
                return -EOPNOTSUPP;

        dev->ethtool_ops->get_pauseparam(dev, &pauseparam);

        if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
                return -EFAULT;
        return 0;
}

static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_pauseparam pauseparam;
        int ret;

        if (!dev->ethtool_ops->set_pauseparam)
                return -EOPNOTSUPP;

        if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
                return -EFAULT;

        ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
        if (!ret)
                ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF);
        return ret;
}

static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
{
        struct ethtool_test test;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        u64 *data;
        int ret, test_len;

        if (!ops->self_test || !ops->get_sset_count)
                return -EOPNOTSUPP;

        test_len = ops->get_sset_count(dev, ETH_SS_TEST);
        if (test_len < 0)
                return test_len;
        WARN_ON(test_len == 0);

        if (copy_from_user(&test, useraddr, sizeof(test)))
                return -EFAULT;

        test.len = test_len;
        data = kcalloc(test_len, sizeof(u64), GFP_USER);
        if (!data)
                return -ENOMEM;

        netif_testing_on(dev);
        ops->self_test(dev, &test, data);
        netif_testing_off(dev);

        ret = -EFAULT;
        if (copy_to_user(useraddr, &test, sizeof(test)))
                goto out;
        useraddr += sizeof(test);
        if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
                goto out;
        ret = 0;

 out:
        kfree(data);
        return ret;
}

static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_gstrings gstrings;
        u8 *data;
        int ret;

        if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
                return -EFAULT;

        ret = __ethtool_get_sset_count(dev, gstrings.string_set);
        if (ret < 0)
                return ret;
        if (ret > S32_MAX / ETH_GSTRING_LEN)
                return -ENOMEM;
        WARN_ON_ONCE(!ret);

        if (gstrings.len && gstrings.len != ret)
                gstrings.len = 0;
        else
                gstrings.len = ret;

        if (gstrings.len) {
                data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
                if (!data)
                        return -ENOMEM;

                __ethtool_get_strings(dev, gstrings.string_set, data);
        } else {
                data = NULL;
        }

        ret = -EFAULT;
        if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
                goto out;
        useraddr += sizeof(gstrings);
        if (gstrings.len &&
            copy_to_user(useraddr, data,
                         array_size(gstrings.len, ETH_GSTRING_LEN)))
                goto out;
        ret = 0;

out:
        vfree(data);
        return ret;
}

__printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
{
        va_list args;

        va_start(args, fmt);
        vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
        va_end(args);

        *data += ETH_GSTRING_LEN;
}
EXPORT_SYMBOL(ethtool_sprintf);

void ethtool_puts(u8 **data, const char *str)
{
        strscpy(*data, str, ETH_GSTRING_LEN);
        *data += ETH_GSTRING_LEN;
}
EXPORT_SYMBOL(ethtool_puts);

static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_value id;
        static bool busy;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        netdevice_tracker dev_tracker;
        int rc;

        if (!ops->set_phys_id)
                return -EOPNOTSUPP;

        if (busy)
                return -EBUSY;

        if (copy_from_user(&id, useraddr, sizeof(id)))
                return -EFAULT;

        rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
        if (rc < 0)
                return rc;

        /* Drop the RTNL lock while waiting, but prevent reentry or
         * removal of the device.
         */
        busy = true;
        netdev_hold(dev, &dev_tracker, GFP_KERNEL);
        netdev_unlock_ops(dev);
        rtnl_unlock();

        if (rc == 0) {
                /* Driver will handle this itself */
                schedule_timeout_interruptible(
                        id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
        } else {
                /* Driver expects to be called at twice the frequency in rc */
                int n = rc * 2, interval = HZ / n;
                u64 count = mul_u32_u32(n, id.data);
                u64 i = 0;

                do {
                        rtnl_lock();
                        netdev_lock_ops(dev);
                        rc = ops->set_phys_id(dev,
                                    (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
                        netdev_unlock_ops(dev);
                        rtnl_unlock();
                        if (rc)
                                break;
                        schedule_timeout_interruptible(interval);
                } while (!signal_pending(current) && (!id.data || i < count));
        }

        rtnl_lock();
        netdev_lock_ops(dev);
        netdev_put(dev, &dev_tracker);
        busy = false;

        (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
        return rc;
}

static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_stats stats;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        u64 *data;
        int ret, n_stats;

        if (!ops->get_ethtool_stats || !ops->get_sset_count)
                return -EOPNOTSUPP;

        n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
        if (n_stats < 0)
                return n_stats;
        if (n_stats > S32_MAX / sizeof(u64))
                return -ENOMEM;
        WARN_ON_ONCE(!n_stats);
        if (copy_from_user(&stats, useraddr, sizeof(stats)))
                return -EFAULT;

        if (stats.n_stats && stats.n_stats != n_stats)
                stats.n_stats = 0;
        else
                stats.n_stats = n_stats;

        if (stats.n_stats) {
                data = vzalloc(array_size(stats.n_stats, sizeof(u64)));
                if (!data)
                        return -ENOMEM;
                ops->get_ethtool_stats(dev, &stats, data);
        } else {
                data = NULL;
        }

        ret = -EFAULT;
        if (copy_to_user(useraddr, &stats, sizeof(stats)))
                goto out;
        useraddr += sizeof(stats);
        if (stats.n_stats &&
            copy_to_user(useraddr, data,
                         array_size(stats.n_stats, sizeof(u64))))
                goto out;
        ret = 0;

 out:
        vfree(data);
        return ret;
}

static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
{
        if (n_stats < 0)
                return n_stats;
        if (n_stats > S32_MAX / sizeof(u64))
                return -ENOMEM;
        if (WARN_ON_ONCE(!n_stats))
                return -EOPNOTSUPP;

        *data = vzalloc(array_size(n_stats, sizeof(u64)));
        if (!*data)
                return -ENOMEM;

        return 0;
}

static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
                                         struct ethtool_stats *stats,
                                         u64 **data)
 {
        const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
        int n_stats, ret;

        if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
                return -EOPNOTSUPP;

        n_stats = phy_ops->get_sset_count(phydev);
        if (stats->n_stats && stats->n_stats != n_stats) {
                stats->n_stats = 0;
                return 0;
        }

        ret = ethtool_vzalloc_stats_array(n_stats, data);
        if (ret)
                return ret;

        stats->n_stats = n_stats;
        return phy_ops->get_stats(phydev, stats, *data);
}

static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
                                          struct ethtool_stats *stats,
                                          u64 **data)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        int n_stats, ret;

        if (!ops || !ops->get_sset_count || !ops->get_ethtool_phy_stats)
                return -EOPNOTSUPP;

        n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
        if (stats->n_stats && stats->n_stats != n_stats) {
                stats->n_stats = 0;
                return 0;
        }

        ret = ethtool_vzalloc_stats_array(n_stats, data);
        if (ret)
                return ret;

        stats->n_stats = n_stats;
        ops->get_ethtool_phy_stats(dev, stats, *data);

        return 0;
}

static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
{
        struct phy_device *phydev = dev->phydev;
        struct ethtool_stats stats;
        u64 *data = NULL;
        int ret = -EOPNOTSUPP;

        if (copy_from_user(&stats, useraddr, sizeof(stats)))
                return -EFAULT;

        if (phydev)
                ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);

        if (ret == -EOPNOTSUPP)
                ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);

        if (ret)
                goto out;

        if (copy_to_user(useraddr, &stats, sizeof(stats))) {
                ret = -EFAULT;
                goto out;
        }

        useraddr += sizeof(stats);
        if (stats.n_stats &&
            copy_to_user(useraddr, data,
                         array_size(stats.n_stats, sizeof(u64))))
                ret = -EFAULT;

 out:
        vfree(data);
        return ret;
}

static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_perm_addr epaddr;

        if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
                return -EFAULT;

        if (epaddr.size < dev->addr_len)
                return -ETOOSMALL;
        epaddr.size = dev->addr_len;

        if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
                return -EFAULT;
        useraddr += sizeof(epaddr);
        if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
                return -EFAULT;
        return 0;
}

static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
                             u32 cmd, u32 (*actor)(struct net_device *))
{
        struct ethtool_value edata = { .cmd = cmd };

        if (!actor)
                return -EOPNOTSUPP;

        edata.data = actor(dev);

        if (copy_to_user(useraddr, &edata, sizeof(edata)))
                return -EFAULT;
        return 0;
}

static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
                             void (*actor)(struct net_device *, u32))
{
        struct ethtool_value edata;

        if (!actor)
                return -EOPNOTSUPP;

        if (copy_from_user(&edata, useraddr, sizeof(edata)))
                return -EFAULT;

        actor(dev, edata.data);
        return 0;
}

static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
                             int (*actor)(struct net_device *, u32))
{
        struct ethtool_value edata;

        if (!actor)
                return -EOPNOTSUPP;

        if (copy_from_user(&edata, useraddr, sizeof(edata)))
                return -EFAULT;

        return actor(dev, edata.data);
}

static int
ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
{
        if (!dev->ethtool_ops->flash_device) {
                req->devlink = netdev_to_devlink_get(dev);
                return 0;
        }

        return dev->ethtool_ops->flash_device(dev, &req->efl);
}

static int ethtool_set_dump(struct net_device *dev,
                        void __user *useraddr)
{
        struct ethtool_dump dump;

        if (!dev->ethtool_ops->set_dump)
                return -EOPNOTSUPP;

        if (copy_from_user(&dump, useraddr, sizeof(dump)))
                return -EFAULT;

        return dev->ethtool_ops->set_dump(dev, &dump);
}

static int ethtool_get_dump_flag(struct net_device *dev,
                                void __user *useraddr)
{
        int ret;
        struct ethtool_dump dump;
        const struct ethtool_ops *ops = dev->ethtool_ops;

        if (!ops->get_dump_flag)
                return -EOPNOTSUPP;

        if (copy_from_user(&dump, useraddr, sizeof(dump)))
                return -EFAULT;

        ret = ops->get_dump_flag(dev, &dump);
        if (ret)
                return ret;

        if (copy_to_user(useraddr, &dump, sizeof(dump)))
                return -EFAULT;
        return 0;
}

static int ethtool_get_dump_data(struct net_device *dev,
                                void __user *useraddr)
{
        int ret;
        __u32 len;
        struct ethtool_dump dump, tmp;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        void *data = NULL;

        if (!ops->get_dump_data || !ops->get_dump_flag)
                return -EOPNOTSUPP;

        if (copy_from_user(&dump, useraddr, sizeof(dump)))
                return -EFAULT;

        memset(&tmp, 0, sizeof(tmp));
        tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
        ret = ops->get_dump_flag(dev, &tmp);
        if (ret)
                return ret;

        len = min(tmp.len, dump.len);
        if (!len)
                return -EFAULT;

        /* Don't ever let the driver think there's more space available
         * than it requested with .get_dump_flag().
         */
        dump.len = len;

        /* Always allocate enough space to hold the whole thing so that the
         * driver does not need to check the length and bother with partial
         * dumping.
         */
        data = vzalloc(tmp.len);
        if (!data)
                return -ENOMEM;
        ret = ops->get_dump_data(dev, &dump, data);
        if (ret)
                goto out;

        /* There are two sane possibilities:
         * 1. The driver's .get_dump_data() does not touch dump.len.
         * 2. Or it may set dump.len to how much it really writes, which
         *    should be tmp.len (or len if it can do a partial dump).
         * In any case respond to userspace with the actual length of data
         * it's receiving.
         */
        WARN_ON(dump.len != len && dump.len != tmp.len);
        dump.len = len;

        if (copy_to_user(useraddr, &dump, sizeof(dump))) {
                ret = -EFAULT;
                goto out;
        }
        useraddr += offsetof(struct ethtool_dump, data);
        if (copy_to_user(useraddr, data, len))
                ret = -EFAULT;
out:
        vfree(data);
        return ret;
}

static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
{
        struct kernel_ethtool_ts_info kernel_info;
        struct ethtool_ts_info info = {};
        int err;

        err = __ethtool_get_ts_info(dev, &kernel_info);
        if (err)
                return err;

        info.cmd = kernel_info.cmd;
        info.so_timestamping = kernel_info.so_timestamping;
        info.phc_index = kernel_info.phc_index;
        info.tx_types = kernel_info.tx_types;
        info.rx_filters = kernel_info.rx_filters;

        if (copy_to_user(useraddr, &info, sizeof(info)))
                return -EFAULT;

        return 0;
}

int ethtool_get_module_info_call(struct net_device *dev,
                                 struct ethtool_modinfo *modinfo)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct phy_device *phydev = dev->phydev;

        if (dev->ethtool->module_fw_flash_in_progress)
                return -EBUSY;

        if (dev->sfp_bus)
                return sfp_get_module_info(dev->sfp_bus, modinfo);

        if (phydev && phydev->drv && phydev->drv->module_info)
                return phydev->drv->module_info(phydev, modinfo);

        if (ops->get_module_info)
                return ops->get_module_info(dev, modinfo);

        return -EOPNOTSUPP;
}

static int ethtool_get_module_info(struct net_device *dev,
                                   void __user *useraddr)
{
        int ret;
        struct ethtool_modinfo modinfo;

        if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
                return -EFAULT;

        ret = ethtool_get_module_info_call(dev, &modinfo);
        if (ret)
                return ret;

        if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
                return -EFAULT;

        return 0;
}

int ethtool_get_module_eeprom_call(struct net_device *dev,
                                   struct ethtool_eeprom *ee, u8 *data)
{
        const struct ethtool_ops *ops = dev->ethtool_ops;
        struct phy_device *phydev = dev->phydev;

        if (dev->ethtool->module_fw_flash_in_progress)
                return -EBUSY;

        if (dev->sfp_bus)
                return sfp_get_module_eeprom(dev->sfp_bus, ee, data);

        if (phydev && phydev->drv && phydev->drv->module_eeprom)
                return phydev->drv->module_eeprom(phydev, ee, data);

        if (ops->get_module_eeprom)
                return ops->get_module_eeprom(dev, ee, data);

        return -EOPNOTSUPP;
}

static int ethtool_get_module_eeprom(struct net_device *dev,
                                     void __user *useraddr)
{
        int ret;
        struct ethtool_modinfo modinfo;

        ret = ethtool_get_module_info_call(dev, &modinfo);
        if (ret)
                return ret;

        return ethtool_get_any_eeprom(dev, useraddr,
                                      ethtool_get_module_eeprom_call,
                                      modinfo.eeprom_len);
}

static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
{
        switch (tuna->id) {
        case ETHTOOL_RX_COPYBREAK:
        case ETHTOOL_TX_COPYBREAK:
        case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
                if (tuna->len != sizeof(u32) ||
                    tuna->type_id != ETHTOOL_TUNABLE_U32)
                        return -EINVAL;
                break;
        case ETHTOOL_PFC_PREVENTION_TOUT:
                if (tuna->len != sizeof(u16) ||
                    tuna->type_id != ETHTOOL_TUNABLE_U16)
                        return -EINVAL;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
{
        int ret;
        struct ethtool_tunable tuna;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        void *data;

        if (!ops->get_tunable)
                return -EOPNOTSUPP;
        if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
                return -EFAULT;
        ret = ethtool_tunable_valid(&tuna);
        if (ret)
                return ret;
        data = kzalloc(tuna.len, GFP_USER);
        if (!data)
                return -ENOMEM;
        ret = ops->get_tunable(dev, &tuna, data);
        if (ret)
                goto out;
        useraddr += sizeof(tuna);
        ret = -EFAULT;
        if (copy_to_user(useraddr, data, tuna.len))
                goto out;
        ret = 0;

out:
        kfree(data);
        return ret;
}

static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
{
        int ret;
        struct ethtool_tunable tuna;
        const struct ethtool_ops *ops = dev->ethtool_ops;
        void *data;

        if (!ops->set_tunable)
                return -EOPNOTSUPP;
        if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
                return -EFAULT;
        ret = ethtool_tunable_valid(&tuna);
        if (ret)
                return ret;
        useraddr += sizeof(tuna);
        data = memdup_user(useraddr, tuna.len);
        if (IS_ERR(data))
                return PTR_ERR(data);
        ret = ops->set_tunable(dev, &tuna, data);

        kfree(data);
        return ret;
}

static noinline_for_stack int
ethtool_get_per_queue_coalesce(struct net_device *dev,
                               void __user *useraddr,
                               struct ethtool_per_queue_op *per_queue_opt)
{
        u32 bit;
        int ret;
        DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);

        if (!dev->ethtool_ops->get_per_queue_coalesce)
                return -EOPNOTSUPP;

        useraddr += sizeof(*per_queue_opt);

        bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
                          MAX_NUM_QUEUE);

        for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
                struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };

                ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
                if (ret != 0)
                        return ret;
                if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
                        return -EFAULT;
                useraddr += sizeof(coalesce);
        }

        return 0;
}

static noinline_for_stack int
ethtool_set_per_queue_coalesce(struct net_device *dev,
                               void __user *useraddr,
                               struct ethtool_per_queue_op *per_queue_opt)
{
        u32 bit;
        int i, ret = 0;
        int n_queue;
        struct ethtool_coalesce *backup = NULL, *tmp = NULL;
        DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);

        if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
            (!dev->ethtool_ops->get_per_queue_coalesce))
                return -EOPNOTSUPP;

        useraddr += sizeof(*per_queue_opt);

        bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
        n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
        tmp = backup = kmalloc_objs(*backup, n_queue);
        if (!backup)
                return -ENOMEM;

        for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
                struct ethtool_coalesce coalesce;

                ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
                if (ret != 0)
                        goto roll_back;

                tmp++;

                if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
                        ret = -EFAULT;
                        goto roll_back;
                }

                if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
                        ret = -EOPNOTSUPP;
                        goto roll_back;
                }

                ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
                if (ret != 0)
                        goto roll_back;

                useraddr += sizeof(coalesce);
        }

roll_back:
        if (ret != 0) {
                tmp = backup;
                for_each_set_bit(i, queue_mask, bit) {
                        dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
                        tmp++;
                }
        }
        kfree(backup);

        return ret;
}

static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
                                 void __user *useraddr, u32 sub_cmd)
{
        struct ethtool_per_queue_op per_queue_opt;

        if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
                return -EFAULT;

        if (per_queue_opt.sub_command != sub_cmd)
                return -EINVAL;

        switch (per_queue_opt.sub_command) {
        case ETHTOOL_GCOALESCE:
                return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
        case ETHTOOL_SCOALESCE:
                return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
        default:
                return -EOPNOTSUPP;
        }
}

static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
{
        switch (tuna->id) {
        case ETHTOOL_PHY_DOWNSHIFT:
        case ETHTOOL_PHY_FAST_LINK_DOWN:
                if (tuna->len != sizeof(u8) ||
                    tuna->type_id != ETHTOOL_TUNABLE_U8)
                        return -EINVAL;
                break;
        case ETHTOOL_PHY_EDPD:
                if (tuna->len != sizeof(u16) ||
                    tuna->type_id != ETHTOOL_TUNABLE_U16)
                        return -EINVAL;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
{
        struct phy_device *phydev = dev->phydev;
        struct ethtool_tunable tuna;
        bool phy_drv_tunable;
        void *data;
        int ret;

        phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
        if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
                return -EOPNOTSUPP;
        if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
                return -EFAULT;
        ret = ethtool_phy_tunable_valid(&tuna);
        if (ret)
                return ret;
        data = kzalloc(tuna.len, GFP_USER);
        if (!data)
                return -ENOMEM;
        if (phy_drv_tunable) {
                mutex_lock(&phydev->lock);
                ret = phydev->drv->get_tunable(phydev, &tuna, data);
                mutex_unlock(&phydev->lock);
        } else {
                ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
        }
        if (ret)
                goto out;
        useraddr += sizeof(tuna);
        ret = -EFAULT;
        if (copy_to_user(useraddr, data, tuna.len))
                goto out;
        ret = 0;

out:
        kfree(data);
        return ret;
}

static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
{
        struct phy_device *phydev = dev->phydev;
        struct ethtool_tunable tuna;
        bool phy_drv_tunable;
        void *data;
        int ret;

        phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
        if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
                return -EOPNOTSUPP;
        if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
                return -EFAULT;
        ret = ethtool_phy_tunable_valid(&tuna);
        if (ret)
                return ret;
        useraddr += sizeof(tuna);
        data = memdup_user(useraddr, tuna.len);
        if (IS_ERR(data))
                return PTR_ERR(data);
        if (phy_drv_tunable) {
                mutex_lock(&phydev->lock);
                ret = phydev->drv->set_tunable(phydev, &tuna, data);
                mutex_unlock(&phydev->lock);
        } else {
                ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
        }

        kfree(data);
        return ret;
}

static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
        int rc;

        if (!dev->ethtool_ops->get_fecparam)
                return -EOPNOTSUPP;

        rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
        if (rc)
                return rc;

        if (WARN_ON_ONCE(fecparam.reserved))
                fecparam.reserved = 0;

        if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
                return -EFAULT;
        return 0;
}

static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
{
        struct ethtool_fecparam fecparam;

        if (!dev->ethtool_ops->set_fecparam)
                return -EOPNOTSUPP;

        if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
                return -EFAULT;

        if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
                return -EINVAL;

        fecparam.active_fec = 0;
        fecparam.reserved = 0;

        return dev->ethtool_ops->set_fecparam(dev, &fecparam);
}

/* The main entry point in this file.  Called from net/core/dev_ioctl.c */

static int
__dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
              u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
{
        struct net_device *dev;
        u32 sub_cmd;
        int rc;
        netdev_features_t old_features;

        dev = __dev_get_by_name(net, ifr->ifr_name);
        if (!dev)
                return -ENODEV;

        if (ethcmd == ETHTOOL_PERQUEUE) {
                if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
                        return -EFAULT;
        } else {
                sub_cmd = ethcmd;
        }
        /* Allow some commands to be done by anyone */
        switch (sub_cmd) {
        case ETHTOOL_GSET:
        case ETHTOOL_GDRVINFO:
        case ETHTOOL_GMSGLVL:
        case ETHTOOL_GLINK:
        case ETHTOOL_GCOALESCE:
        case ETHTOOL_GRINGPARAM:
        case ETHTOOL_GPAUSEPARAM:
        case ETHTOOL_GRXCSUM:
        case ETHTOOL_GTXCSUM:
        case ETHTOOL_GSG:
        case ETHTOOL_GSSET_INFO:
        case ETHTOOL_GSTRINGS:
        case ETHTOOL_GSTATS:
        case ETHTOOL_GPHYSTATS:
        case ETHTOOL_GTSO:
        case ETHTOOL_GPERMADDR:
        case ETHTOOL_GUFO:
        case ETHTOOL_GGSO:
        case ETHTOOL_GGRO:
        case ETHTOOL_GFLAGS:
        case ETHTOOL_GPFLAGS:
        case ETHTOOL_GRXFH:
        case ETHTOOL_GRXRINGS:
        case ETHTOOL_GRXCLSRLCNT:
        case ETHTOOL_GRXCLSRULE:
        case ETHTOOL_GRXCLSRLALL:
        case ETHTOOL_GRXFHINDIR:
        case ETHTOOL_GRSSH:
        case ETHTOOL_GFEATURES:
        case ETHTOOL_GCHANNELS:
        case ETHTOOL_GET_TS_INFO:
        case ETHTOOL_GEEE:
        case ETHTOOL_GTUNABLE:
        case ETHTOOL_PHY_GTUNABLE:
        case ETHTOOL_GLINKSETTINGS:
        case ETHTOOL_GFECPARAM:
                break;
        default:
                if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
                        return -EPERM;
        }

        netdev_lock_ops(dev);
        if (dev->dev.parent)
                pm_runtime_get_sync(dev->dev.parent);

        if (!netif_device_present(dev)) {
                rc = -ENODEV;
                goto out;
        }

        if (dev->ethtool_ops->begin) {
                rc = dev->ethtool_ops->begin(dev);
                if (rc < 0)
                        goto out;
        }
        old_features = dev->features;

        switch (ethcmd) {
        case ETHTOOL_GSET:
                rc = ethtool_get_settings(dev, useraddr);
                break;
        case ETHTOOL_SSET:
                rc = ethtool_set_settings(dev, useraddr);
                break;
        case ETHTOOL_GDRVINFO:
                rc = ethtool_get_drvinfo(dev, devlink_state);
                break;
        case ETHTOOL_GREGS:
                rc = ethtool_get_regs(dev, useraddr);
                break;
        case ETHTOOL_GWOL:
                rc = ethtool_get_wol(dev, useraddr);
                break;
        case ETHTOOL_SWOL:
                rc = ethtool_set_wol(dev, useraddr);
                break;
        case ETHTOOL_GMSGLVL:
                rc = ethtool_get_value(dev, useraddr, ethcmd,
                                       dev->ethtool_ops->get_msglevel);
                break;
        case ETHTOOL_SMSGLVL:
                rc = ethtool_set_value_void(dev, useraddr,
                                       dev->ethtool_ops->set_msglevel);
                if (!rc)
                        ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF);
                break;
        case ETHTOOL_GEEE:
                rc = ethtool_get_eee(dev, useraddr);
                break;
        case ETHTOOL_SEEE:
                rc = ethtool_set_eee(dev, useraddr);
                break;
        case ETHTOOL_NWAY_RST:
                rc = ethtool_nway_reset(dev);
                break;
        case ETHTOOL_GLINK:
                rc = ethtool_get_link(dev, useraddr);
                break;
        case ETHTOOL_GEEPROM:
                rc = ethtool_get_eeprom(dev, useraddr);
                break;
        case ETHTOOL_SEEPROM:
                rc = ethtool_set_eeprom(dev, useraddr);
                break;
        case ETHTOOL_GCOALESCE:
                rc = ethtool_get_coalesce(dev, useraddr);
                break;
        case ETHTOOL_SCOALESCE:
                rc = ethtool_set_coalesce(dev, useraddr);
                break;
        case ETHTOOL_GRINGPARAM:
                rc = ethtool_get_ringparam(dev, useraddr);
                break;
        case ETHTOOL_SRINGPARAM:
                rc = ethtool_set_ringparam(dev, useraddr);
                break;
        case ETHTOOL_GPAUSEPARAM:
                rc = ethtool_get_pauseparam(dev, useraddr);
                break;
        case ETHTOOL_SPAUSEPARAM:
                rc = ethtool_set_pauseparam(dev, useraddr);
                break;
        case ETHTOOL_TEST:
                rc = ethtool_self_test(dev, useraddr);
                break;
        case ETHTOOL_GSTRINGS:
                rc = ethtool_get_strings(dev, useraddr);
                break;
        case ETHTOOL_PHYS_ID:
                rc = ethtool_phys_id(dev, useraddr);
                break;
        case ETHTOOL_GSTATS:
                rc = ethtool_get_stats(dev, useraddr);
                break;
        case ETHTOOL_GPERMADDR:
                rc = ethtool_get_perm_addr(dev, useraddr);
                break;
        case ETHTOOL_GFLAGS:
                rc = ethtool_get_value(dev, useraddr, ethcmd,
                                        __ethtool_get_flags);
                break;
        case ETHTOOL_SFLAGS:
                rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
                break;
        case ETHTOOL_GPFLAGS:
                rc = ethtool_get_value(dev, useraddr, ethcmd,
                                       dev->ethtool_ops->get_priv_flags);
                if (!rc)
                        ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF);
                break;
        case ETHTOOL_SPFLAGS:
                rc = ethtool_set_value(dev, useraddr,
                                       dev->ethtool_ops->set_priv_flags);
                break;
        case ETHTOOL_GRXFH:
                rc = ethtool_get_rxfh_fields(dev, ethcmd, useraddr);
                break;
        case ETHTOOL_SRXFH:
                rc = ethtool_set_rxfh_fields(dev, ethcmd, useraddr);
                break;
        case ETHTOOL_GRXRINGS:
                rc = ethtool_get_rxrings(dev, ethcmd, useraddr);
                break;
        case ETHTOOL_GRXCLSRLCNT:
        case ETHTOOL_GRXCLSRULE:
        case ETHTOOL_GRXCLSRLALL:
                rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
                break;
        case ETHTOOL_SRXCLSRLDEL:
        case ETHTOOL_SRXCLSRLINS:
                rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
                break;
        case ETHTOOL_FLASHDEV:
                rc = ethtool_flash_device(dev, devlink_state);
                break;
        case ETHTOOL_RESET:
                rc = ethtool_reset(dev, useraddr);
                break;
        case ETHTOOL_GSSET_INFO:
                rc = ethtool_get_sset_info(dev, useraddr);
                break;
        case ETHTOOL_GRXFHINDIR:
                rc = ethtool_get_rxfh_indir(dev, useraddr);
                break;
        case ETHTOOL_SRXFHINDIR:
                rc = ethtool_set_rxfh_indir(dev, useraddr);
                break;
        case ETHTOOL_GRSSH:
                rc = ethtool_get_rxfh(dev, useraddr);
                break;
        case ETHTOOL_SRSSH:
                rc = ethtool_set_rxfh(dev, useraddr);
                break;
        case ETHTOOL_GFEATURES:
                rc = ethtool_get_features(dev, useraddr);
                break;
        case ETHTOOL_SFEATURES:
                rc = ethtool_set_features(dev, useraddr);
                break;
        case ETHTOOL_GTXCSUM:
        case ETHTOOL_GRXCSUM:
        case ETHTOOL_GSG:
        case ETHTOOL_GTSO:
        case ETHTOOL_GGSO:
        case ETHTOOL_GGRO:
                rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
                break;
        case ETHTOOL_STXCSUM:
        case ETHTOOL_SRXCSUM:
        case ETHTOOL_SSG:
        case ETHTOOL_STSO:
        case ETHTOOL_SGSO:
        case ETHTOOL_SGRO:
                rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
                break;
        case ETHTOOL_GCHANNELS:
                rc = ethtool_get_channels(dev, useraddr);
                break;
        case ETHTOOL_SCHANNELS:
                rc = ethtool_set_channels(dev, useraddr);
                break;
        case ETHTOOL_SET_DUMP:
                rc = ethtool_set_dump(dev, useraddr);
                break;
        case ETHTOOL_GET_DUMP_FLAG:
                rc = ethtool_get_dump_flag(dev, useraddr);
                break;
        case ETHTOOL_GET_DUMP_DATA:
                rc = ethtool_get_dump_data(dev, useraddr);
                break;
        case ETHTOOL_GET_TS_INFO:
                rc = ethtool_get_ts_info(dev, useraddr);
                break;
        case ETHTOOL_GMODULEINFO:
                rc = ethtool_get_module_info(dev, useraddr);
                break;
        case ETHTOOL_GMODULEEEPROM:
                rc = ethtool_get_module_eeprom(dev, useraddr);
                break;
        case ETHTOOL_GTUNABLE:
                rc = ethtool_get_tunable(dev, useraddr);
                break;
        case ETHTOOL_STUNABLE:
                rc = ethtool_set_tunable(dev, useraddr);
                break;
        case ETHTOOL_GPHYSTATS:
                rc = ethtool_get_phy_stats(dev, useraddr);
                break;
        case ETHTOOL_PERQUEUE:
                rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
                break;
        case ETHTOOL_GLINKSETTINGS:
                rc = ethtool_get_link_ksettings(dev, useraddr);
                break;
        case ETHTOOL_SLINKSETTINGS:
                rc = ethtool_set_link_ksettings(dev, useraddr);
                break;
        case ETHTOOL_PHY_GTUNABLE:
                rc = get_phy_tunable(dev, useraddr);
                break;
        case ETHTOOL_PHY_STUNABLE:
                rc = set_phy_tunable(dev, useraddr);
                break;
        case ETHTOOL_GFECPARAM:
                rc = ethtool_get_fecparam(dev, useraddr);
                break;
        case ETHTOOL_SFECPARAM:
                rc = ethtool_set_fecparam(dev, useraddr);
                break;
        default:
                rc = -EOPNOTSUPP;
        }

        if (dev->ethtool_ops->complete)
                dev->ethtool_ops->complete(dev);

        if (old_features != dev->features)
                netdev_features_change(dev);
out:
        if (dev->dev.parent)
                pm_runtime_put(dev->dev.parent);
        netdev_unlock_ops(dev);

        return rc;
}

int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
{
        struct ethtool_devlink_compat *state;
        u32 ethcmd;
        int rc;

        if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
                return -EFAULT;

        state = kzalloc_obj(*state);
        if (!state)
                return -ENOMEM;

        switch (ethcmd) {
        case ETHTOOL_FLASHDEV:
                if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
                        rc = -EFAULT;
                        goto exit_free;
                }
                state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
                break;
        }

        rtnl_lock();
        rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
        rtnl_unlock();
        if (rc)
                goto exit_free;

        switch (ethcmd) {
        case ETHTOOL_FLASHDEV:
                if (state->devlink)
                        rc = devlink_compat_flash_update(state->devlink,
                                                         state->efl.data);
                break;
        case ETHTOOL_GDRVINFO:
                if (state->devlink)
                        devlink_compat_running_version(state->devlink,
                                                       state->info.fw_version,
                                                       sizeof(state->info.fw_version));
                if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
                        rc = -EFAULT;
                        goto exit_free;
                }
                break;
        }

exit_free:
        if (state->devlink)
                devlink_put(state->devlink);
        kfree(state);
        return rc;
}

struct ethtool_rx_flow_key {
        struct flow_dissector_key_basic                 basic;
        union {
                struct flow_dissector_key_ipv4_addrs    ipv4;
                struct flow_dissector_key_ipv6_addrs    ipv6;
        };
        struct flow_dissector_key_ports                 tp;
        struct flow_dissector_key_ip                    ip;
        struct flow_dissector_key_vlan                  vlan;
        struct flow_dissector_key_eth_addrs             eth_addrs;
} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */

struct ethtool_rx_flow_match {
        struct flow_dissector           dissector;
        struct ethtool_rx_flow_key      key;
        struct ethtool_rx_flow_key      mask;
};

struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
{
        const struct ethtool_rx_flow_spec *fs = input->fs;
        struct ethtool_rx_flow_match *match;
        struct ethtool_rx_flow_rule *flow;
        struct flow_action_entry *act;

        flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
                       sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
        if (!flow)
                return ERR_PTR(-ENOMEM);

        /* ethtool_rx supports only one single action per rule. */
        flow->rule = flow_rule_alloc(1);
        if (!flow->rule) {
                kfree(flow);
                return ERR_PTR(-ENOMEM);
        }

        match = (struct ethtool_rx_flow_match *)flow->priv;
        flow->rule->match.dissector     = &match->dissector;
        flow->rule->match.mask          = &match->mask;
        flow->rule->match.key           = &match->key;

        match->mask.basic.n_proto = htons(0xffff);

        switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
        case ETHER_FLOW: {
                const struct ethhdr *ether_spec, *ether_m_spec;

                ether_spec = &fs->h_u.ether_spec;
                ether_m_spec = &fs->m_u.ether_spec;

                if (!is_zero_ether_addr(ether_m_spec->h_source)) {
                        ether_addr_copy(match->key.eth_addrs.src,
                                        ether_spec->h_source);
                        ether_addr_copy(match->mask.eth_addrs.src,
                                        ether_m_spec->h_source);
                }
                if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
                        ether_addr_copy(match->key.eth_addrs.dst,
                                        ether_spec->h_dest);
                        ether_addr_copy(match->mask.eth_addrs.dst,
                                        ether_m_spec->h_dest);
                }
                if (ether_m_spec->h_proto) {
                        match->key.basic.n_proto = ether_spec->h_proto;
                        match->mask.basic.n_proto = ether_m_spec->h_proto;
                }
                }
                break;
        case TCP_V4_FLOW:
        case UDP_V4_FLOW: {
                const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;

                match->key.basic.n_proto = htons(ETH_P_IP);

                v4_spec = &fs->h_u.tcp_ip4_spec;
                v4_m_spec = &fs->m_u.tcp_ip4_spec;

                if (v4_m_spec->ip4src) {
                        match->key.ipv4.src = v4_spec->ip4src;
                        match->mask.ipv4.src = v4_m_spec->ip4src;
                }
                if (v4_m_spec->ip4dst) {
                        match->key.ipv4.dst = v4_spec->ip4dst;
                        match->mask.ipv4.dst = v4_m_spec->ip4dst;
                }
                if (v4_m_spec->ip4src ||
                    v4_m_spec->ip4dst) {
                        match->dissector.used_keys |=
                                BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
                        match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
                                offsetof(struct ethtool_rx_flow_key, ipv4);
                }
                if (v4_m_spec->psrc) {
                        match->key.tp.src = v4_spec->psrc;
                        match->mask.tp.src = v4_m_spec->psrc;
                }
                if (v4_m_spec->pdst) {
                        match->key.tp.dst = v4_spec->pdst;
                        match->mask.tp.dst = v4_m_spec->pdst;
                }
                if (v4_m_spec->psrc ||
                    v4_m_spec->pdst) {
                        match->dissector.used_keys |=
                                BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
                        match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
                                offsetof(struct ethtool_rx_flow_key, tp);
                }
                if (v4_m_spec->tos) {
                        match->key.ip.tos = v4_spec->tos;
                        match->mask.ip.tos = v4_m_spec->tos;
                        match->dissector.used_keys |=
                                BIT(FLOW_DISSECTOR_KEY_IP);
                        match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
                                offsetof(struct ethtool_rx_flow_key, ip);
                }
                }
                break;
        case TCP_V6_FLOW:
        case UDP_V6_FLOW: {
                const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;

                match->key.basic.n_proto = htons(ETH_P_IPV6);

                v6_spec = &fs->h_u.tcp_ip6_spec;
                v6_m_spec = &fs->m_u.tcp_ip6_spec;
                if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
                        memcpy(&match->key.ipv6.src, v6_spec->ip6src,
                               sizeof(match->key.ipv6.src));
                        memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
                               sizeof(match->mask.ipv6.src));
                }
                if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
                        memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
                               sizeof(match->key.ipv6.dst));
                        memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
                               sizeof(match->mask.ipv6.dst));
                }
                if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
                    !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
                        match->dissector.used_keys |=
                                BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
                        match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
                                offsetof(struct ethtool_rx_flow_key, ipv6);
                }
                if (v6_m_spec->psrc) {
                        match->key.tp.src = v6_spec->psrc;
                        match->mask.tp.src = v6_m_spec->psrc;
                }
                if (v6_m_spec->pdst) {
                        match->key.tp.dst = v6_spec->pdst;
                        match->mask.tp.dst = v6_m_spec->pdst;
                }
                if (v6_m_spec->psrc ||
                    v6_m_spec->pdst) {
                        match->dissector.used_keys |=
                                BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
                        match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
                                offsetof(struct ethtool_rx_flow_key, tp);
                }
                if (v6_m_spec->tclass) {
                        match->key.ip.tos = v6_spec->tclass;
                        match->mask.ip.tos = v6_m_spec->tclass;
                        match->dissector.used_keys |=
                                BIT_ULL(FLOW_DISSECTOR_KEY_IP);
                        match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
                                offsetof(struct ethtool_rx_flow_key, ip);
                }
                }
                break;
        default:
                ethtool_rx_flow_rule_destroy(flow);
                return ERR_PTR(-EINVAL);
        }

        switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
        case TCP_V4_FLOW:
        case TCP_V6_FLOW:
                match->key.basic.ip_proto = IPPROTO_TCP;
                match->mask.basic.ip_proto = 0xff;
                break;
        case UDP_V4_FLOW:
        case UDP_V6_FLOW:
                match->key.basic.ip_proto = IPPROTO_UDP;
                match->mask.basic.ip_proto = 0xff;
                break;
        }

        match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
        match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
                offsetof(struct ethtool_rx_flow_key, basic);

        if (fs->flow_type & FLOW_EXT) {
                const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
                const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;

                if (ext_m_spec->vlan_etype) {
                        match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
                        match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
                }

                if (ext_m_spec->vlan_tci) {
                        match->key.vlan.vlan_id =
                                ntohs(ext_h_spec->vlan_tci) & 0x0fff;
                        match->mask.vlan.vlan_id =
                                ntohs(ext_m_spec->vlan_tci) & 0x0fff;

                        match->key.vlan.vlan_dei =
                                !!(ext_h_spec->vlan_tci & htons(0x1000));
                        match->mask.vlan.vlan_dei =
                                !!(ext_m_spec->vlan_tci & htons(0x1000));

                        match->key.vlan.vlan_priority =
                                (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
                        match->mask.vlan.vlan_priority =
                                (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
                }

                if (ext_m_spec->vlan_etype ||
                    ext_m_spec->vlan_tci) {
                        match->dissector.used_keys |=
                                BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
                        match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
                                offsetof(struct ethtool_rx_flow_key, vlan);
                }
        }
        if (fs->flow_type & FLOW_MAC_EXT) {
                const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
                const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;

                memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
                       ETH_ALEN);
                memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
                       ETH_ALEN);

                match->dissector.used_keys |=
                        BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
                match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
                        offsetof(struct ethtool_rx_flow_key, eth_addrs);
        }

        act = &flow->rule->action.entries[0];
        switch (fs->ring_cookie) {
        case RX_CLS_FLOW_DISC:
                act->id = FLOW_ACTION_DROP;
                break;
        case RX_CLS_FLOW_WAKE:
                act->id = FLOW_ACTION_WAKE;
                break;
        default:
                act->id = FLOW_ACTION_QUEUE;
                if (fs->flow_type & FLOW_RSS)
                        act->queue.ctx = input->rss_ctx;

                act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
                act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
                break;
        }

        return flow;
}
EXPORT_SYMBOL(ethtool_rx_flow_rule_create);

void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
{
        kfree(flow->rule);
        kfree(flow);
}
EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);