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[autoboot] Enable infrastructure to specify an autoboot device location 

iPXE will currently attempt to boot from every network device for
which it has a driver.  Where a system has more than one network
device supported by iPXE, this renders BIOS IPL lists ineffective.

Allow an autoboot device location to be specified.  If such a location
is specified, then only devices matching that location will be used as
part of the automatic boot sequence.  If no such location is
specified, then all devices will be used.

Note that this does not affect the "autoboot" command, which will
continue to use all devices.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Alex Williamson 2014-02-25 16:00:23 -07:00 committed by Michael Brown
parent 27d1b40ee9
commit 123bae9d93
2 changed files with 29 additions and 18 deletions
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4
src/include/usr/autoboot.h
View File

@ -10,6 +10,7 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/in.h>
#include <ipxe/device.h>
struct net_device;
struct uri;
struct settings;
@ -25,12 +26,13 @@ enum uriboot_flags {
URIBOOT_NO_SAN_BOOT | \
URIBOOT_NO_SAN_UNHOOK )
extern struct device_description autoboot_device;
extern int uriboot ( struct uri *filename, struct uri *root_path, int drive,
unsigned int flags );
extern struct uri *
fetch_next_server_and_filename ( struct settings *settings );
extern int netboot ( struct net_device *netdev );
extern int autoboot ( void );
extern void ipxe ( struct net_device *netdev );
extern int pxe_menu_boot ( struct net_device *netdev );

43
src/usr/autoboot.c
View File

@ -49,6 +49,9 @@ FILE_LICENCE ( GPL2_OR_LATER );
*
*/
/** Device location of preferred autoboot device */
struct device_description autoboot_device;
/* Disambiguate the various error causes */
#define ENOENT_BOOT __einfo_error ( EINFO_ENOENT_BOOT )
#define EINFO_ENOENT_BOOT \
@ -73,15 +76,6 @@ __weak int pxe_menu_boot ( struct net_device *netdev __unused ) {
return -ENOTSUP;
}
/**
* Identify the boot network device
*
* @ret netdev Boot network device
*/
static struct net_device * find_boot_netdev ( void ) {
return NULL;
}
/**
* Parse next-server and filename into a URI
*
@ -427,22 +421,37 @@ int netboot ( struct net_device *netdev ) {
return rc;
}
/**
* Test if network device matches the autoboot device location
*
* @v netdev Network device
* @ret is_autoboot Network device matches the autoboot device location
*/
static int is_autoboot_device ( struct net_device *netdev ) {
return ( ( netdev->dev->desc.bus_type == autoboot_device.bus_type ) &&
( netdev->dev->desc.location == autoboot_device.location ) );
}
/**
* Boot the system
*/
int autoboot ( void ) {
struct net_device *boot_netdev;
static int autoboot ( void ) {
struct net_device *netdev;
int rc = -ENODEV;
/* If we have an identifable boot device, try that first */
if ( ( boot_netdev = find_boot_netdev() ) )
rc = netboot ( boot_netdev );
/* If that fails, try booting from any of the other devices */
/* Try booting from each network device. If we have a
* specified autoboot device location, then use only devices
* matching that location.
*/
for_each_netdev ( netdev ) {
if ( netdev == boot_netdev )
/* Skip any non-matching devices, if applicable */
if ( autoboot_device.bus_type &&
( ! is_autoboot_device ( netdev ) ) )
continue;
/* Attempt booting from this device */
rc = netboot ( netdev );
}