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[netdevice] Add "ifname" setting 

Expose the network interface name (e.g. "net0") as a setting.  This
allows a script to obtain the name of the most recently opened network
interface via ${netX/ifname}.

Signed-off-by: Andrew Widdersheim <amwiddersheim@gmail.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Andrew Widdersheim 2016-01-16 11:21:34 -05:00 committed by Michael Brown
parent cc252605ce
commit 3fd81799ba
1 changed files with 22 additions and 0 deletions
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22
src/net/netdev_settings.c
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@ -65,6 +65,11 @@ const struct setting chip_setting __setting ( SETTING_NETDEV, chip ) = {
.description = "Chip",
.type = &setting_type_string,
};
const struct setting ifname_setting __setting ( SETTING_NETDEV, ifname ) = {
.name = "ifname",
.description = "Interface name",
.type = &setting_type_string,
};
/**
* Store MAC address setting
@ -199,6 +204,22 @@ static int netdev_fetch_chip ( struct net_device *netdev, void *data,
return strlen ( chip );
}
/**
* Fetch ifname setting
*
* @v netdev Network device
* @v data Buffer to fill with setting data
* @v len Length of buffer
* @ret len Length of setting data, or negative error
*/
static int netdev_fetch_ifname ( struct net_device *netdev, void *data,
size_t len ) {
const char *ifname = netdev->name;
strncpy ( data, ifname, len );
return strlen ( ifname );
}
/** A network device setting operation */
struct netdev_setting_operation {
/** Setting */
@ -229,6 +250,7 @@ static struct netdev_setting_operation netdev_setting_operations[] = {
{ &busloc_setting, NULL, netdev_fetch_busloc },
{ &busid_setting, NULL, netdev_fetch_busid },
{ &chip_setting, NULL, netdev_fetch_chip },
{ &ifname_setting, NULL, netdev_fetch_ifname },
};
/**