kernel-ark/net/core/ethtool.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

820 lines
18 KiB
C

/*
* 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. We fall back to calling do_ioctl()
* for drivers which haven't been converted to ethtool_ops yet.
*
* It's GPL, stupid.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <asm/uaccess.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;
}
u32 ethtool_op_get_tx_csum(struct net_device *dev)
{
return (dev->features & NETIF_F_IP_CSUM) != 0;
}
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;
}
u32 ethtool_op_get_sg(struct net_device *dev)
{
return (dev->features & NETIF_F_SG) != 0;
}
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;
}
u32 ethtool_op_get_tso(struct net_device *dev)
{
return (dev->features & NETIF_F_TSO) != 0;
}
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;
}
/* Handlers for each ethtool command */
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
{
struct ethtool_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 int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
{
struct ethtool_drvinfo info;
struct ethtool_ops *ops = dev->ethtool_ops;
if (!ops->get_drvinfo)
return -EOPNOTSUPP;
memset(&info, 0, sizeof(info));
info.cmd = ETHTOOL_GDRVINFO;
ops->get_drvinfo(dev, &info);
if (ops->self_test_count)
info.testinfo_len = ops->self_test_count(dev);
if (ops->get_stats_count)
info.n_stats = ops->get_stats_count(dev);
if (ops->get_regs_len)
info.regdump_len = ops->get_regs_len(dev);
if (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 int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
struct ethtool_regs regs;
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 = kmalloc(reglen, GFP_USER);
if (!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 (copy_to_user(useraddr, regbuf, regs.len))
goto out;
ret = 0;
out:
kfree(regbuf);
return ret;
}
static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
{
struct ethtool_wolinfo wol = { 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_get_msglevel(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata = { ETHTOOL_GMSGLVL };
if (!dev->ethtool_ops->get_msglevel)
return -EOPNOTSUPP;
edata.data = dev->ethtool_ops->get_msglevel(dev);
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
static int ethtool_set_msglevel(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata;
if (!dev->ethtool_ops->set_msglevel)
return -EOPNOTSUPP;
if (copy_from_user(&edata, useraddr, sizeof(edata)))
return -EFAULT;
dev->ethtool_ops->set_msglevel(dev, edata.data);
return 0;
}
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, void __user *useraddr)
{
struct ethtool_value edata = { ETHTOOL_GLINK };
if (!dev->ethtool_ops->get_link)
return -EOPNOTSUPP;
edata.data = 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;
struct ethtool_ops *ops = dev->ethtool_ops;
u8 *data;
int ret;
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(eeprom.len, GFP_USER);
if (!data)
return -ENOMEM;
ret = -EFAULT;
if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
goto out;
ret = ops->get_eeprom(dev, &eeprom, data);
if (ret)
goto out;
ret = -EFAULT;
if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
goto out;
if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
goto out;
ret = 0;
out:
kfree(data);
return ret;
}
static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
{
struct ethtool_eeprom eeprom;
struct ethtool_ops *ops = dev->ethtool_ops;
u8 *data;
int ret;
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(eeprom.len, GFP_USER);
if (!data)
return -ENOMEM;
ret = -EFAULT;
if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
goto out;
ret = ops->set_eeprom(dev, &eeprom, data);
if (ret)
goto out;
if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
ret = -EFAULT;
out:
kfree(data);
return ret;
}
static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
{
struct ethtool_coalesce coalesce = { 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 int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
{
struct ethtool_coalesce coalesce;
if (!dev->ethtool_ops->get_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 = { 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 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->get_pauseparam)
return -EOPNOTSUPP;
if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
return -EFAULT;
return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
}
static int ethtool_get_rx_csum(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata = { ETHTOOL_GRXCSUM };
if (!dev->ethtool_ops->get_rx_csum)
return -EOPNOTSUPP;
edata.data = dev->ethtool_ops->get_rx_csum(dev);
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata;
if (!dev->ethtool_ops->set_rx_csum)
return -EOPNOTSUPP;
if (copy_from_user(&edata, useraddr, sizeof(edata)))
return -EFAULT;
dev->ethtool_ops->set_rx_csum(dev, edata.data);
return 0;
}
static int ethtool_get_tx_csum(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata = { ETHTOOL_GTXCSUM };
if (!dev->ethtool_ops->get_tx_csum)
return -EOPNOTSUPP;
edata.data = dev->ethtool_ops->get_tx_csum(dev);
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
static int __ethtool_set_sg(struct net_device *dev, u32 data)
{
int err;
if (!data && dev->ethtool_ops->set_tso) {
err = dev->ethtool_ops->set_tso(dev, 0);
if (err)
return err;
}
return dev->ethtool_ops->set_sg(dev, data);
}
static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata;
int err;
if (!dev->ethtool_ops->set_tx_csum)
return -EOPNOTSUPP;
if (copy_from_user(&edata, useraddr, sizeof(edata)))
return -EFAULT;
if (!edata.data && dev->ethtool_ops->set_sg) {
err = __ethtool_set_sg(dev, 0);
if (err)
return err;
}
return dev->ethtool_ops->set_tx_csum(dev, edata.data);
}
static int ethtool_get_sg(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata = { ETHTOOL_GSG };
if (!dev->ethtool_ops->get_sg)
return -EOPNOTSUPP;
edata.data = dev->ethtool_ops->get_sg(dev);
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata;
if (!dev->ethtool_ops->set_sg)
return -EOPNOTSUPP;
if (copy_from_user(&edata, useraddr, sizeof(edata)))
return -EFAULT;
if (edata.data &&
!(dev->features & (NETIF_F_IP_CSUM |
NETIF_F_NO_CSUM |
NETIF_F_HW_CSUM)))
return -EINVAL;
return __ethtool_set_sg(dev, edata.data);
}
static int ethtool_get_tso(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata = { ETHTOOL_GTSO };
if (!dev->ethtool_ops->get_tso)
return -EOPNOTSUPP;
edata.data = dev->ethtool_ops->get_tso(dev);
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
{
struct ethtool_value edata;
if (!dev->ethtool_ops->set_tso)
return -EOPNOTSUPP;
if (copy_from_user(&edata, useraddr, sizeof(edata)))
return -EFAULT;
if (edata.data && !(dev->features & NETIF_F_SG))
return -EINVAL;
return dev->ethtool_ops->set_tso(dev, edata.data);
}
static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
{
struct ethtool_test test;
struct ethtool_ops *ops = dev->ethtool_ops;
u64 *data;
int ret;
if (!ops->self_test || !ops->self_test_count)
return -EOPNOTSUPP;
if (copy_from_user(&test, useraddr, sizeof(test)))
return -EFAULT;
test.len = ops->self_test_count(dev);
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;
struct ethtool_ops *ops = dev->ethtool_ops;
u8 *data;
int ret;
if (!ops->get_strings)
return -EOPNOTSUPP;
if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
return -EFAULT;
switch (gstrings.string_set) {
case ETH_SS_TEST:
if (!ops->self_test_count)
return -EOPNOTSUPP;
gstrings.len = ops->self_test_count(dev);
break;
case ETH_SS_STATS:
if (!ops->get_stats_count)
return -EOPNOTSUPP;
gstrings.len = ops->get_stats_count(dev);
break;
default:
return -EINVAL;
}
data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
if (!data)
return -ENOMEM;
ops->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;
if (!dev->ethtool_ops->phys_id)
return -EOPNOTSUPP;
if (copy_from_user(&id, useraddr, sizeof(id)))
return -EFAULT;
return dev->ethtool_ops->phys_id(dev, id.data);
}
static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
{
struct ethtool_stats stats;
struct ethtool_ops *ops = dev->ethtool_ops;
u64 *data;
int ret;
if (!ops->get_ethtool_stats || !ops->get_stats_count)
return -EOPNOTSUPP;
if (copy_from_user(&stats, useraddr, sizeof(stats)))
return -EFAULT;
stats.n_stats = ops->get_stats_count(dev);
data = kmalloc(stats.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;
}
/* The main entry point in this file. Called from net/core/dev.c */
int dev_ethtool(struct ifreq *ifr)
{
struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
void __user *useraddr = ifr->ifr_data;
u32 ethcmd;
int rc;
/*
* XXX: This can be pushed down into the ethtool_* handlers that
* need it. Keep existing behaviour for the moment.
*/
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (!dev || !netif_device_present(dev))
return -ENODEV;
if (!dev->ethtool_ops)
goto ioctl;
if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
return -EFAULT;
if(dev->ethtool_ops->begin)
if ((rc = dev->ethtool_ops->begin(dev)) < 0)
return rc;
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_msglevel(dev, useraddr);
break;
case ETHTOOL_SMSGLVL:
rc = ethtool_set_msglevel(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_GRXCSUM:
rc = ethtool_get_rx_csum(dev, useraddr);
break;
case ETHTOOL_SRXCSUM:
rc = ethtool_set_rx_csum(dev, useraddr);
break;
case ETHTOOL_GTXCSUM:
rc = ethtool_get_tx_csum(dev, useraddr);
break;
case ETHTOOL_STXCSUM:
rc = ethtool_set_tx_csum(dev, useraddr);
break;
case ETHTOOL_GSG:
rc = ethtool_get_sg(dev, useraddr);
break;
case ETHTOOL_SSG:
rc = ethtool_set_sg(dev, useraddr);
break;
case ETHTOOL_GTSO:
rc = ethtool_get_tso(dev, useraddr);
break;
case ETHTOOL_STSO:
rc = ethtool_set_tso(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;
default:
rc = -EOPNOTSUPP;
}
if(dev->ethtool_ops->complete)
dev->ethtool_ops->complete(dev);
return rc;
ioctl:
if (dev->do_ioctl)
return dev->do_ioctl(dev, ifr, SIOCETHTOOL);
return -EOPNOTSUPP;
}
EXPORT_SYMBOL(dev_ethtool);
EXPORT_SYMBOL(ethtool_op_get_link);
EXPORT_SYMBOL(ethtool_op_get_sg);
EXPORT_SYMBOL(ethtool_op_get_tso);
EXPORT_SYMBOL(ethtool_op_get_tx_csum);
EXPORT_SYMBOL(ethtool_op_set_sg);
EXPORT_SYMBOL(ethtool_op_set_tso);
EXPORT_SYMBOL(ethtool_op_set_tx_csum);