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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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13
include/linux/ethtool.h
View file

@ -250,6 +250,12 @@ struct ethtool_stats {
u64 data[0];
};
struct ethtool_perm_addr {
u32 cmd; /* ETHTOOL_GPERMADDR */
u32 size;
u8 data[0];
};
struct net_device;
/* Some generic methods drivers may use in their ethtool_ops */
@ -261,6 +267,8 @@ u32 ethtool_op_get_sg(struct net_device *dev);
int ethtool_op_set_sg(struct net_device *dev, u32 data);
u32 ethtool_op_get_tso(struct net_device *dev);
int ethtool_op_set_tso(struct net_device *dev, u32 data);
int ethtool_op_get_perm_addr(struct net_device *dev,
struct ethtool_perm_addr *addr, u8 *data);
/**
* &ethtool_ops - Alter and report network device settings
@ -294,7 +302,8 @@ int ethtool_op_set_tso(struct net_device *dev, u32 data);
* get_strings: Return a set of strings that describe the requested objects
* phys_id: Identify the device
* get_stats: Return statistics about the device
*
* get_perm_addr: Gets the permanent hardware address
*
* Description:
*
* get_settings:
@ -352,6 +361,7 @@ struct ethtool_ops {
int (*phys_id)(struct net_device *, u32);
int (*get_stats_count)(struct net_device *);
void (*get_ethtool_stats)(struct net_device *, struct ethtool_stats *, u64 *);
int (*get_perm_addr)(struct net_device *, struct ethtool_perm_addr *, u8 *);
int (*begin)(struct net_device *);
void (*complete)(struct net_device *);
};
@ -389,6 +399,7 @@ struct ethtool_ops {
#define ETHTOOL_GSTATS 0x0000001d /* get NIC-specific statistics */
#define ETHTOOL_GTSO 0x0000001e /* Get TSO enable (ethtool_value) */
#define ETHTOOL_STSO 0x0000001f /* Set TSO enable (ethtool_value) */
#define ETHTOOL_GPERMADDR 0x00000020 /* Get permanent hardware address */
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET

1
include/linux/netdevice.h
View file

@ -337,6 +337,7 @@ struct net_device
/* Interface address info. */
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
unsigned char addr_len; /* hardware address length */
unsigned short dev_id; /* for shared network cards */

49
net/core/ethtool.c
View file

@ -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);