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[NET]: Add support for getting the permanent hardware address.

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This patch adds a new field to net device to hold the permanent
hardware address, and adds a new generic ethtool_op function to
get that address.

Signed-off-by: Jon Wetzel <jon_wetzel@dell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Wetzel
2005-08-20 17:15:54 -07:00
committed by David S. Miller
parent 8cd25c1fcf
commit a6f9a70578
3 changed files with 62 additions and 1 deletions
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49
net/core/ethtool.c
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@@ -81,6 +81,18 @@ int ethtool_op_set_tso(struct net_device *dev, u32 data)
return 0;
}
int ethtool_op_get_perm_addr(struct net_device *dev, struct ethtool_perm_addr *addr, u8 *data)
{
unsigned char len = dev->addr_len;
if ( addr->size < len )
return -ETOOSMALL;
addr->size = len;
memcpy(data, dev->perm_addr, len);
return 0;
}
/* Handlers for each ethtool command */
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
@@ -683,6 +695,39 @@ static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
return ret;
}
static int ethtool_get_perm_addr(struct net_device *dev, void *useraddr)
{
struct ethtool_perm_addr epaddr;
u8 *data;
int ret;
if (!dev->ethtool_ops->get_perm_addr)
return -EOPNOTSUPP;
if (copy_from_user(&epaddr,useraddr,sizeof(epaddr)))
return -EFAULT;
data = kmalloc(epaddr.size, GFP_USER);
if (!data)
return -ENOMEM;
ret = dev->ethtool_ops->get_perm_addr(dev,&epaddr,data);
if (ret)
return ret;
ret = -EFAULT;
if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
goto out;
useraddr += sizeof(epaddr);
if (copy_to_user(useraddr, data, epaddr.size))
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)
@@ -806,6 +851,9 @@ int dev_ethtool(struct ifreq *ifr)
case ETHTOOL_GSTATS:
rc = ethtool_get_stats(dev, useraddr);
break;
case ETHTOOL_GPERMADDR:
rc = ethtool_get_perm_addr(dev, useraddr);
break;
default:
rc = -EOPNOTSUPP;
}
@@ -826,6 +874,7 @@ int dev_ethtool(struct ifreq *ifr)
EXPORT_SYMBOL(dev_ethtool);
EXPORT_SYMBOL(ethtool_op_get_link);
EXPORT_SYMBOL_GPL(ethtool_op_get_perm_addr);
EXPORT_SYMBOL(ethtool_op_get_sg);
EXPORT_SYMBOL(ethtool_op_get_tso);
EXPORT_SYMBOL(ethtool_op_get_tx_csum);