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linux/net/core/ethtool.c
Ben Hutchings 67ae7cf1ee ethtool: Allow zero-length register dumps again 
Some drivers (ab)use the ethtool_ops::get_regs operation to expose
only a hardware revision ID.  Commit
a77f5db361 ('ethtool: Allocate register
dump buffer with vmalloc()') had the side-effect of breaking these, as
vmalloc() returns a null pointer for size=0 whereas kmalloc() did not.

For backward-compatibility, allow zero-length dumps again.

Reported-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Cc: stable@kernel.org [2.6.37+]
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-21 15:25:30 -07:00

1860 lines
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/*
* 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.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#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/bitops.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/rtnetlink.h>
#include <linux/sched.h>
/*
* 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)
{
return netif_carrier_ok(dev) ? 1 : 0;
}
EXPORT_SYMBOL(ethtool_op_get_link);
u32 ethtool_op_get_tx_csum(struct net_device *dev)
{
return (dev->features & NETIF_F_ALL_CSUM) != 0;
}
EXPORT_SYMBOL(ethtool_op_get_tx_csum);
int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
{
if (data)
dev->features |= NETIF_F_IP_CSUM;
else
dev->features &= ~NETIF_F_IP_CSUM;
return 0;
}
EXPORT_SYMBOL(ethtool_op_set_tx_csum);
int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
{
if (data)
dev->features |= NETIF_F_HW_CSUM;
else
dev->features &= ~NETIF_F_HW_CSUM;
return 0;
}
EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
{
if (data)
dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
else
dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
return 0;
}
EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
u32 ethtool_op_get_sg(struct net_device *dev)
{
return (dev->features & NETIF_F_SG) != 0;
}
EXPORT_SYMBOL(ethtool_op_get_sg);
int ethtool_op_set_sg(struct net_device *dev, u32 data)
{
if (data)
dev->features |= NETIF_F_SG;
else
dev->features &= ~NETIF_F_SG;
return 0;
}
EXPORT_SYMBOL(ethtool_op_set_sg);
u32 ethtool_op_get_tso(struct net_device *dev)
{
return (dev->features & NETIF_F_TSO) != 0;
}
EXPORT_SYMBOL(ethtool_op_get_tso);
int ethtool_op_set_tso(struct net_device *dev, u32 data)
{
if (data)
dev->features |= NETIF_F_TSO;
else
dev->features &= ~NETIF_F_TSO;
return 0;
}
EXPORT_SYMBOL(ethtool_op_set_tso);
u32 ethtool_op_get_ufo(struct net_device *dev)
{
return (dev->features & NETIF_F_UFO) != 0;
}
EXPORT_SYMBOL(ethtool_op_get_ufo);
int ethtool_op_set_ufo(struct net_device *dev, u32 data)
{
if (data)
dev->features |= NETIF_F_UFO;
else
dev->features &= ~NETIF_F_UFO;
return 0;
}
EXPORT_SYMBOL(ethtool_op_set_ufo);
/* the following list of flags are the same as their associated
* NETIF_F_xxx values in include/linux/netdevice.h
*/
static const u32 flags_dup_features =
(ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
ETH_FLAG_RXHASH);
u32 ethtool_op_get_flags(struct net_device *dev)
{
/* in the future, this function will probably contain additional
* handling for flags which are not so easily handled
* by a simple masking operation
*/
return dev->features & flags_dup_features;
}
EXPORT_SYMBOL(ethtool_op_get_flags);
/* Check if device can enable (or disable) particular feature coded in "data"
* argument. Flags "supported" describe features that can be toggled by device.
* If feature can not be toggled, it state (enabled or disabled) must match
* hardcoded device features state, otherwise flags are marked as invalid.
*/
bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported)
{
u32 features = dev->features & flags_dup_features;
/* "data" can contain only flags_dup_features bits,
* see __ethtool_set_flags */
return (features & ~supported) != (data & ~supported);
}
EXPORT_SYMBOL(ethtool_invalid_flags);
int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
{
if (ethtool_invalid_flags(dev, data, supported))
return -EINVAL;
dev->features = ((dev->features & ~flags_dup_features) |
(data & flags_dup_features));
return 0;
}
EXPORT_SYMBOL(ethtool_op_set_flags);
/* Handlers for each ethtool command */
#define ETHTOOL_DEV_FEATURE_WORDS 1
static void ethtool_get_features_compat(struct net_device *dev,
struct ethtool_get_features_block *features)
{
if (!dev->ethtool_ops)
return;
/* getting RX checksum */
if (dev->ethtool_ops->get_rx_csum)
if (dev->ethtool_ops->get_rx_csum(dev))
features[0].active |= NETIF_F_RXCSUM;
/* mark legacy-changeable features */
if (dev->ethtool_ops->set_sg)
features[0].available |= NETIF_F_SG;
if (dev->ethtool_ops->set_tx_csum)
features[0].available |= NETIF_F_ALL_CSUM;
if (dev->ethtool_ops->set_tso)
features[0].available |= NETIF_F_ALL_TSO;
if (dev->ethtool_ops->set_rx_csum)
features[0].available |= NETIF_F_RXCSUM;
if (dev->ethtool_ops->set_flags)
features[0].available |= flags_dup_features;
}
static int ethtool_set_feature_compat(struct net_device *dev,
int (*legacy_set)(struct net_device *, u32),
struct ethtool_set_features_block *features, u32 mask)
{
u32 do_set;
if (!legacy_set)
return 0;
if (!(features[0].valid & mask))
return 0;
features[0].valid &= ~mask;
do_set = !!(features[0].requested & mask);
if (legacy_set(dev, do_set) < 0)
netdev_info(dev,
"Legacy feature change (%s) failed for 0x%08x\n",
do_set ? "set" : "clear", mask);
return 1;
}
static int ethtool_set_flags_compat(struct net_device *dev,
int (*legacy_set)(struct net_device *, u32),
struct ethtool_set_features_block *features, u32 mask)
{
u32 value;
if (!legacy_set)
return 0;
if (!(features[0].valid & mask))
return 0;
value = dev->features & ~features[0].valid;
value |= features[0].requested;
features[0].valid &= ~mask;
if (legacy_set(dev, value & mask) < 0)
netdev_info(dev, "Legacy flags change failed\n");
return 1;
}
static int ethtool_set_features_compat(struct net_device *dev,
struct ethtool_set_features_block *features)
{
int compat;
if (!dev->ethtool_ops)
return 0;
compat = ethtool_set_feature_compat(dev, dev->ethtool_ops->set_sg,
features, NETIF_F_SG);
compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tx_csum,
features, NETIF_F_ALL_CSUM);
compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tso,
features, NETIF_F_ALL_TSO);
compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_rx_csum,
features, NETIF_F_RXCSUM);
compat |= ethtool_set_flags_compat(dev, dev->ethtool_ops->set_flags,
features, flags_dup_features);
return compat;
}
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] = {
{
.available = dev->hw_features,
.requested = dev->wanted_features,
.active = dev->features,
.never_changed = NETIF_F_NEVER_CHANGE,
},
};
u32 __user *sizeaddr;
u32 copy_size;
ethtool_get_features_compat(dev, features);
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, 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];
int 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;
if (features[0].valid & ~NETIF_F_ETHTOOL_BITS)
return -EINVAL;
if (ethtool_set_features_compat(dev, features))
ret |= ETHTOOL_F_COMPAT;
if (features[0].valid & ~dev->hw_features) {
features[0].valid &= dev->hw_features;
ret |= ETHTOOL_F_UNSUPPORTED;
}
dev->wanted_features &= ~features[0].valid;
dev->wanted_features |= features[0].valid & features[0].requested;
__netdev_update_features(dev);
if ((dev->wanted_features ^ dev->features) & features[0].valid)
ret |= ETHTOOL_F_WISH;
return ret;
}
static const char netdev_features_strings[ETHTOOL_DEV_FEATURE_WORDS * 32][ETH_GSTRING_LEN] = {
/* NETIF_F_SG */ "tx-scatter-gather",
/* NETIF_F_IP_CSUM */ "tx-checksum-ipv4",
/* NETIF_F_NO_CSUM */ "tx-checksum-unneeded",
/* NETIF_F_HW_CSUM */ "tx-checksum-ip-generic",
/* NETIF_F_IPV6_CSUM */ "tx-checksum-ipv6",
/* NETIF_F_HIGHDMA */ "highdma",
/* NETIF_F_FRAGLIST */ "tx-scatter-gather-fraglist",
/* NETIF_F_HW_VLAN_TX */ "tx-vlan-hw-insert",
/* NETIF_F_HW_VLAN_RX */ "rx-vlan-hw-parse",
/* NETIF_F_HW_VLAN_FILTER */ "rx-vlan-filter",
/* NETIF_F_VLAN_CHALLENGED */ "vlan-challenged",
/* NETIF_F_GSO */ "tx-generic-segmentation",
/* NETIF_F_LLTX */ "tx-lockless",
/* NETIF_F_NETNS_LOCAL */ "netns-local",
/* NETIF_F_GRO */ "rx-gro",
/* NETIF_F_LRO */ "rx-lro",
/* NETIF_F_TSO */ "tx-tcp-segmentation",
/* NETIF_F_UFO */ "tx-udp-fragmentation",
/* NETIF_F_GSO_ROBUST */ "tx-gso-robust",
/* NETIF_F_TSO_ECN */ "tx-tcp-ecn-segmentation",
/* NETIF_F_TSO6 */ "tx-tcp6-segmentation",
/* NETIF_F_FSO */ "tx-fcoe-segmentation",
"",
"",
/* NETIF_F_FCOE_CRC */ "tx-checksum-fcoe-crc",
/* NETIF_F_SCTP_CSUM */ "tx-checksum-sctp",
/* NETIF_F_FCOE_MTU */ "fcoe-mtu",
/* NETIF_F_NTUPLE */ "rx-ntuple-filter",
/* NETIF_F_RXHASH */ "rx-hashing",
/* NETIF_F_RXCSUM */ "rx-checksum",
/* NETIF_F_NOCACHE_COPY */ "tx-nocache-copy",
/* NETIF_F_LOOPBACK */ "loopback",
};
static int __ethtool_get_sset_count(struct net_device *dev, int sset)
{
const struct ethtool_ops *ops = dev->ethtool_ops;
if (sset == ETH_SS_FEATURES)
return ARRAY_SIZE(netdev_features_strings);
if (ops && 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_ops *ops = dev->ethtool_ops;
if (stringset == ETH_SS_FEATURES)
memcpy(data, netdev_features_strings,
sizeof(netdev_features_strings));
else
/* ops->get_strings is valid because checked earlier */
ops->get_strings(dev, stringset, data);
}
static u32 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_ALL_CSUM | NETIF_F_SCTP_CSUM;
case ETHTOOL_GRXCSUM:
case ETHTOOL_SRXCSUM:
return NETIF_F_RXCSUM;
case ETHTOOL_GSG:
case ETHTOOL_SSG:
return NETIF_F_SG;
case ETHTOOL_GTSO:
case ETHTOOL_STSO:
return NETIF_F_ALL_TSO;
case ETHTOOL_GUFO:
case ETHTOOL_SUFO:
return NETIF_F_UFO;
case ETHTOOL_GGSO:
case ETHTOOL_SGSO:
return NETIF_F_GSO;
case ETHTOOL_GGRO:
case ETHTOOL_SGRO:
return NETIF_F_GRO;
default:
BUG();
}
}
static void *__ethtool_get_one_feature_actor(struct net_device *dev, u32 ethcmd)
{
const struct ethtool_ops *ops = dev->ethtool_ops;
if (!ops)
return NULL;
switch (ethcmd) {
case ETHTOOL_GTXCSUM:
return ops->get_tx_csum;
case ETHTOOL_GRXCSUM:
return ops->get_rx_csum;
case ETHTOOL_SSG:
return ops->get_sg;
case ETHTOOL_STSO:
return ops->get_tso;
case ETHTOOL_SUFO:
return ops->get_ufo;
default:
return NULL;
}
}
static u32 __ethtool_get_rx_csum_oldbug(struct net_device *dev)
{
return !!(dev->features & NETIF_F_ALL_CSUM);
}
static int ethtool_get_one_feature(struct net_device *dev,
char __user *useraddr, u32 ethcmd)
{
u32 mask = ethtool_get_feature_mask(ethcmd);
struct ethtool_value edata = {
.cmd = ethcmd,
.data = !!(dev->features & mask),
};
/* compatibility with discrete get_ ops */
if (!(dev->hw_features & mask)) {
u32 (*actor)(struct net_device *);
actor = __ethtool_get_one_feature_actor(dev, ethcmd);
/* bug compatibility with old get_rx_csum */
if (ethcmd == ETHTOOL_GRXCSUM && !actor)
actor = __ethtool_get_rx_csum_oldbug;
if (actor)
edata.data = actor(dev);
}
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
static int __ethtool_set_tx_csum(struct net_device *dev, u32 data);
static int __ethtool_set_rx_csum(struct net_device *dev, u32 data);
static int __ethtool_set_sg(struct net_device *dev, u32 data);
static int __ethtool_set_tso(struct net_device *dev, u32 data);
static int __ethtool_set_ufo(struct net_device *dev, u32 data);
static int ethtool_set_one_feature(struct net_device *dev,
void __user *useraddr, u32 ethcmd)
{
struct ethtool_value edata;
u32 mask;
if (copy_from_user(&edata, useraddr, sizeof(edata)))
return -EFAULT;
mask = ethtool_get_feature_mask(ethcmd);
mask &= dev->hw_features;
if (mask) {
if (edata.data)
dev->wanted_features |= mask;
else
dev->wanted_features &= ~mask;
__netdev_update_features(dev);
return 0;
}
/* Driver is not converted to ndo_fix_features or does not
* support changing this offload. In the latter case it won't
* have corresponding ethtool_ops field set.
*
* Following part is to be removed after all drivers advertise
* their changeable features in netdev->hw_features and stop
* using discrete offload setting ops.
*/
switch (ethcmd) {
case ETHTOOL_STXCSUM:
return __ethtool_set_tx_csum(dev, edata.data);
case ETHTOOL_SRXCSUM:
return __ethtool_set_rx_csum(dev, edata.data);
case ETHTOOL_SSG:
return __ethtool_set_sg(dev, edata.data);
case ETHTOOL_STSO:
return __ethtool_set_tso(dev, edata.data);
case ETHTOOL_SUFO:
return __ethtool_set_ufo(dev, edata.data);
default:
return -EOPNOTSUPP;
}
}
int __ethtool_set_flags(struct net_device *dev, u32 data)
{
u32 changed;
if (data & ~flags_dup_features)
return -EINVAL;
/* legacy set_flags() op */
if (dev->ethtool_ops->set_flags) {
if (unlikely(dev->hw_features & flags_dup_features))
netdev_warn(dev,
"driver BUG: mixed hw_features and set_flags()\n");
return dev->ethtool_ops->set_flags(dev, data);
}
/* allow changing only bits set in hw_features */
changed = (data ^ dev->features) & flags_dup_features;
if (changed & ~dev->hw_features)
return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
dev->wanted_features =
(dev->wanted_features & ~changed) | (data & dev->hw_features);
__netdev_update_features(dev);
return 0;
}
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
{
struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
int err;
if (!dev->ethtool_ops->get_settings)
return -EOPNOTSUPP;
err = dev->ethtool_ops->get_settings(dev, &cmd);
if (err < 0)
return err;
if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
return -EFAULT;
return 0;
}
static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
{
struct ethtool_cmd cmd;
if (!dev->ethtool_ops->set_settings)
return -EOPNOTSUPP;
if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
return -EFAULT;
return dev->ethtool_ops->set_settings(dev, &cmd);
}
static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
void __user *useraddr)
{
struct ethtool_drvinfo info;
const struct ethtool_ops *ops = dev->ethtool_ops;
memset(&info, 0, sizeof(info));
info.cmd = ETHTOOL_GDRVINFO;
if (ops && ops->get_drvinfo) {
ops->get_drvinfo(dev, &info);
} else if (dev->dev.parent && dev->dev.parent->driver) {
strlcpy(info.bus_info, dev_name(dev->dev.parent),
sizeof(info.bus_info));
strlcpy(info.driver, dev->dev.parent->driver->name,
sizeof(info.driver));
} else {
return -EOPNOTSUPP;
}
/*
* this method of obtaining string set info is deprecated;
* Use ETHTOOL_GSSET_INFO instead.
*/
if (ops && ops->get_sset_count) {
int rc;
rc = ops->get_sset_count(dev, ETH_SS_TEST);
if (rc >= 0)
info.testinfo_len = rc;
rc = ops->get_sset_count(dev, ETH_SS_STATS);
if (rc >= 0)
info.n_stats = rc;
rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
if (rc >= 0)
info.n_priv_flags = rc;
}
if (ops && ops->get_regs_len)
info.regdump_len = ops->get_regs_len(dev);
if (ops && ops->get_eeprom_len)
info.eedump_len = ops->get_eeprom_len(dev);
if (copy_to_user(useraddr, &info, sizeof(info)))
return -EFAULT;
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 = kzalloc(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, idx * sizeof(u32)))
goto out;
ret = 0;
out:
kfree(info_buf);
return ret;
}
static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
u32 cmd, void __user *useraddr)
{
struct ethtool_rxnfc info;
size_t info_size = sizeof(info);
if (!dev->ethtool_ops->set_rxnfc)
return -EOPNOTSUPP;
/* 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_SRXFH)
info_size = (offsetof(struct ethtool_rxnfc, data) +
sizeof(info.data));
if (copy_from_user(&info, useraddr, info_size))
return -EFAULT;
return dev->ethtool_ops->set_rxnfc(dev, &info);
}
static noinline_for_stack int ethtool_get_rxnfc(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;
int ret;
void *rule_buf = NULL;
if (!ops->get_rxnfc)
return -EOPNOTSUPP;
/* 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)
info_size = (offsetof(struct ethtool_rxnfc, data) +
sizeof(info.data));
if (copy_from_user(&info, useraddr, info_size))
return -EFAULT;
if (info.cmd == ETHTOOL_GRXCLSRLALL) {
if (info.rule_cnt > 0) {
if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
rule_buf = kzalloc(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 = -EFAULT;
if (copy_to_user(useraddr, &info, info_size))
goto err_out;
if (rule_buf) {
useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
if (copy_to_user(useraddr, rule_buf,
info.rule_cnt * sizeof(u32)))
goto err_out;
}
ret = 0;
err_out:
kfree(rule_buf);
return ret;
}
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
void __user *useraddr)
{
struct ethtool_rxfh_indir *indir;
u32 table_size;
size_t full_size;
int ret;
if (!dev->ethtool_ops->get_rxfh_indir)
return -EOPNOTSUPP;
if (copy_from_user(&table_size,
useraddr + offsetof(struct ethtool_rxfh_indir, size),
sizeof(table_size)))
return -EFAULT;
if (table_size >
(KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
return -ENOMEM;
full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
indir = kzalloc(full_size, GFP_USER);
if (!indir)
return -ENOMEM;
indir->cmd = ETHTOOL_GRXFHINDIR;
indir->size = table_size;
ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
if (ret)
goto out;
if (copy_to_user(useraddr, indir, full_size))
ret = -EFAULT;
out:
kfree(indir);
return ret;
}
static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
void __user *useraddr)
{
struct ethtool_rxfh_indir *indir;
u32 table_size;
size_t full_size;
int ret;
if (!dev->ethtool_ops->set_rxfh_indir)
return -EOPNOTSUPP;
if (copy_from_user(&table_size,
useraddr + offsetof(struct ethtool_rxfh_indir, size),
sizeof(table_size)))
return -EFAULT;
if (table_size >
(KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
return -ENOMEM;
full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
indir = kmalloc(full_size, GFP_USER);
if (!indir)
return -ENOMEM;
if (copy_from_user(indir, useraddr, full_size)) {
ret = -EFAULT;
goto out;
}
ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
out:
kfree(indir);
return ret;
}
/*
* ethtool does not (or did not) set masks for flow parameters that are
* not specified, so if both value and mask are 0 then this must be
* treated as equivalent to a mask with all bits set. Implement that
* here rather than in drivers.
*/
static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
{
struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
if (fs->flow_type != TCP_V4_FLOW &&
fs->flow_type != UDP_V4_FLOW &&
fs->flow_type != SCTP_V4_FLOW)
return;
if (!(entry->ip4src | mask->ip4src))
mask->ip4src = htonl(0xffffffff);
if (!(entry->ip4dst | mask->ip4dst))
mask->ip4dst = htonl(0xffffffff);
if (!(entry->psrc | mask->psrc))
mask->psrc = htons(0xffff);
if (!(entry->pdst | mask->pdst))
mask->pdst = htons(0xffff);
if (!(entry->tos | mask->tos))
mask->tos = 0xff;
if (!(fs->vlan_tag | fs->vlan_tag_mask))
fs->vlan_tag_mask = 0xffff;
if (!(fs->data | fs->data_mask))
fs->data_mask = 0xffffffffffffffffULL;
}
static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
void __user *useraddr)
{
struct ethtool_rx_ntuple cmd;
const struct ethtool_ops *ops = dev->ethtool_ops;
if (!ops->set_rx_ntuple)
return -EOPNOTSUPP;
if (!(dev->features & NETIF_F_NTUPLE))
return -EINVAL;
if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
return -EFAULT;
rx_ntuple_fix_masks(&cmd.fs);
return ops->set_rx_ntuple(dev, &cmd);
}
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 (regs.len > reglen)
regs.len = reglen;
regbuf = vzalloc(reglen);
if (reglen && !regbuf)
return -ENOMEM;
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 (regbuf && copy_to_user(useraddr, regbuf, regs.len))
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 (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 = { .cmd = ETHTOOL_GWOL };
if (!dev->ethtool_ops->get_wol)
return -EOPNOTSUPP;
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;
if (!dev->ethtool_ops->set_wol)
return -EOPNOTSUPP;
if (copy_from_user(&wol, useraddr, sizeof(wol)))
return -EFAULT;
return dev->ethtool_ops->set_wol(dev, &wol);
}
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 };
if (!dev->ethtool_ops->get_link)
return -EOPNOTSUPP;
edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
static int ethtool_get_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->get_eeprom || !ops->get_eeprom_len)
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 = kmalloc(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 = ops->get_eeprom(dev, &eeprom, data);
if (ret)
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_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)
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 = kmalloc(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 };
if (!dev->ethtool_ops->get_coalesce)
return -EOPNOTSUPP;
dev->ethtool_ops->get_coalesce(dev, &coalesce);
if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
return -EFAULT;
return 0;
}
static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
void __user *useraddr)
{
struct ethtool_coalesce coalesce;
if (!dev->ethtool_ops->set_coalesce)
return -EOPNOTSUPP;
if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
return -EFAULT;
return dev->ethtool_ops->set_coalesce(dev, &coalesce);
}
static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
{
struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
if (!dev->ethtool_ops->get_ringparam)
return -EOPNOTSUPP;
dev->ethtool_ops->get_ringparam(dev, &ringparam);
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 ethtool_ringparam ringparam;
if (!dev->ethtool_ops->set_ringparam)
return -EOPNOTSUPP;
if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
return -EFAULT;
return dev->ethtool_ops->set_ringparam(dev, &ringparam);
}
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;
if (!dev->ethtool_ops->set_channels)
return -EOPNOTSUPP;
if (copy_from_user(&channels, useraddr, sizeof(channels)))
return -EFAULT;
return dev->ethtool_ops->set_channels(dev, &channels);
}
static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
{
struct ethtool_pauseparam pauseparam = { 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;
if (!dev->ethtool_ops->set_pauseparam)
return -EOPNOTSUPP;
if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
return -EFAULT;
return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
}
static int __ethtool_set_sg(struct net_device *dev, u32 data)
{
int err;
if (!dev->ethtool_ops->set_sg)
return -EOPNOTSUPP;
if (data && !(dev->features & NETIF_F_ALL_CSUM))
return -EINVAL;
if (!data && dev->ethtool_ops->set_tso) {
err = dev->ethtool_ops->set_tso(dev, 0);
if (err)
return err;
}
if (!data && dev->ethtool_ops->set_ufo) {
err = dev->ethtool_ops->set_ufo(dev, 0);
if (err)
return err;
}
return dev->ethtool_ops->set_sg(dev, data);
}
static int __ethtool_set_tx_csum(struct net_device *dev, u32 data)
{
int err;
if (!dev->ethtool_ops->set_tx_csum)
return -EOPNOTSUPP;
if (!data && dev->ethtool_ops->set_sg) {
err = __ethtool_set_sg(dev, 0);
if (err)
return err;
}
return dev->ethtool_ops->set_tx_csum(dev, data);
}
static int __ethtool_set_rx_csum(struct net_device *dev, u32 data)
{
if (!dev->ethtool_ops->set_rx_csum)
return -EOPNOTSUPP;
if (!data)
dev->features &= ~NETIF_F_GRO;
return dev->ethtool_ops->set_rx_csum(dev, data);
}
static int __ethtool_set_tso(struct net_device *dev, u32 data)
{
if (!dev->ethtool_ops->set_tso)
return -EOPNOTSUPP;
if (data && !(dev->features & NETIF_F_SG))
return -EINVAL;
return dev->ethtool_ops->set_tso(dev, data);
}
static int __ethtool_set_ufo(struct net_device *dev, u32 data)
{
if (!dev->ethtool_ops->set_ufo)
return -EOPNOTSUPP;
if (data && !(dev->features & NETIF_F_SG))
return -EINVAL;
if (data && !((dev->features & NETIF_F_GEN_CSUM) ||
(dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
== (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
return -EINVAL;
return dev->ethtool_ops->set_ufo(dev, data);
}
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 = kmalloc(test_len * sizeof(u64), GFP_USER);
if (!data)
return -ENOMEM;
ops->self_test(dev, &test, data);
ret = -EFAULT;
if (copy_to_user(useraddr, &test, sizeof(test)))
goto out;
useraddr += sizeof(test);
if (copy_to_user(useraddr, data, 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;
gstrings.len = ret;
data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
if (!data)
return -ENOMEM;
__ethtool_get_strings(dev, gstrings.string_set, data);
ret = -EFAULT;
if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
goto out;
useraddr += sizeof(gstrings);
if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
goto out;
ret = 0;
out:
kfree(data);
return ret;
}
static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
struct ethtool_value id;
static bool busy;
int rc;
if (!dev->ethtool_ops->set_phys_id)
return -EOPNOTSUPP;
if (busy)
return -EBUSY;
if (copy_from_user(&id, useraddr, sizeof(id)))
return -EFAULT;
rc = dev->ethtool_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;
dev_hold(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, i, interval = HZ / n;
/* Count down seconds */
do {
/* Count down iterations per second */
i = n;
do {
rtnl_lock();
rc = dev->ethtool_ops->set_phys_id(dev,
(i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
rtnl_unlock();
if (rc)
break;
schedule_timeout_interruptible(interval);
} while (!signal_pending(current) && --i != 0);
} while (!signal_pending(current) &&
(id.data == 0 || --id.data != 0));
}
rtnl_lock();
dev_put(dev);
busy = false;
(void)dev->ethtool_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;
WARN_ON(n_stats == 0);
if (copy_from_user(&stats, useraddr, sizeof(stats)))
return -EFAULT;
stats.n_stats = n_stats;
data = kmalloc(n_stats * sizeof(u64), GFP_USER);
if (!data)
return -ENOMEM;
ops->get_ethtool_stats(dev, &stats, data);
ret = -EFAULT;
if (copy_to_user(useraddr, &stats, sizeof(stats)))
goto out;
useraddr += sizeof(stats);
if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
goto out;
ret = 0;
out:
kfree(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 noinline_for_stack int ethtool_flash_device(struct net_device *dev,
char __user *useraddr)
{
struct ethtool_flash efl;
if (copy_from_user(&efl, useraddr, sizeof(efl)))
return -EFAULT;
if (!dev->ethtool_ops->flash_device)
return -EOPNOTSUPP;
return dev->ethtool_ops->flash_device(dev, &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 (!dev->ethtool_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 (!dev->ethtool_ops->get_dump_data ||
!dev->ethtool_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 = (tmp.len > dump.len) ? dump.len : tmp.len;
if (!len)
return -EFAULT;
data = vzalloc(tmp.len);
if (!data)
return -ENOMEM;
ret = ops->get_dump_data(dev, &dump, data);
if (ret)
goto out;
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;
}
/* The main entry point in this file. Called from net/core/dev.c */
int dev_ethtool(struct net *net, struct ifreq *ifr)
{
struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
void __user *useraddr = ifr->ifr_data;
u32 ethcmd;
int rc;
u32 old_features;
if (!dev || !netif_device_present(dev))
return -ENODEV;
if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
return -EFAULT;
if (!dev->ethtool_ops) {
/* ETHTOOL_GDRVINFO does not require any driver support.
* It is also unprivileged and does not change anything,
* so we can take a shortcut to it. */
if (ethcmd == ETHTOOL_GDRVINFO)
return ethtool_get_drvinfo(dev, useraddr);
else
return -EOPNOTSUPP;
}
/* Allow some commands to be done by anyone */
switch (ethcmd) {
case ETHTOOL_GSET:
case ETHTOOL_GDRVINFO:
case ETHTOOL_GMSGLVL:
case ETHTOOL_GCOALESCE:
case ETHTOOL_GRINGPARAM:
case ETHTOOL_GPAUSEPARAM:
case ETHTOOL_GRXCSUM:
case ETHTOOL_GTXCSUM:
case ETHTOOL_GSG:
case ETHTOOL_GSTRINGS:
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_GFEATURES:
break;
default:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
}
if (dev->ethtool_ops->begin) {
rc = dev->ethtool_ops->begin(dev);
if (rc < 0)
return rc;
}
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, useraddr);
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);
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,
(dev->ethtool_ops->get_flags ?
dev->ethtool_ops->get_flags :
ethtool_op_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);
break;
case ETHTOOL_SPFLAGS:
rc = ethtool_set_value(dev, useraddr,
dev->ethtool_ops->set_priv_flags);
break;
case ETHTOOL_GRXFH:
case ETHTOOL_GRXRINGS:
case ETHTOOL_GRXCLSRLCNT:
case ETHTOOL_GRXCLSRULE:
case ETHTOOL_GRXCLSRLALL:
rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
break;
case ETHTOOL_SRXFH:
case ETHTOOL_SRXCLSRLDEL:
case ETHTOOL_SRXCLSRLINS:
rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
break;
case ETHTOOL_FLASHDEV:
rc = ethtool_flash_device(dev, useraddr);
break;
case ETHTOOL_RESET:
rc = ethtool_reset(dev, useraddr);
break;
case ETHTOOL_SRXNTUPLE:
rc = ethtool_set_rx_ntuple(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_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_GUFO:
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_SUFO:
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;
default:
rc = -EOPNOTSUPP;
}
if (dev->ethtool_ops->complete)
dev->ethtool_ops->complete(dev);
if (old_features != dev->features)
netdev_features_change(dev);
return rc;
}
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