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[autoboot] Allow autoboot device to be identified by link-layer address 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/24/head
Michael Brown 2014-07-07 23:55:55 +01:00
parent c7051d826b
commit 00c745e5ff
3 changed files with 65 additions and 15 deletions
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6
src/arch/i386/core/pci_autoboot.c
View File

@ -34,10 +34,8 @@ uint16_t __bss16 ( autoboot_busdevfn );
*/
static void pci_autoboot_init ( void ) {
if ( autoboot_busdevfn ) {
autoboot_device.bus_type = BUS_TYPE_PCI;
autoboot_device.location = autoboot_busdevfn;
}
if ( autoboot_busdevfn )
set_autoboot_busloc ( BUS_TYPE_PCI, autoboot_busdevfn );
}
/** PCI autoboot device initialisation function */

6
src/include/usr/autoboot.h
View File

@ -9,8 +9,8 @@
FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/in.h>
#include <ipxe/device.h>
struct net_device;
struct uri;
struct settings;
@ -26,7 +26,9 @@ enum uriboot_flags {
URIBOOT_NO_SAN_BOOT | \
URIBOOT_NO_SAN_UNHOOK )
extern struct device_description autoboot_device;
extern void set_autoboot_busloc ( unsigned int bus_type,
unsigned int location );
extern void set_autoboot_ll_addr ( const void *ll_addr, size_t len );
extern int uriboot ( struct uri *filename, struct uri *root_path, int drive,
unsigned int flags );

68
src/usr/autoboot.c
View File

@ -49,8 +49,14 @@ FILE_LICENCE ( GPL2_OR_LATER );
*
*/
/** Device location of preferred autoboot device */
struct device_description autoboot_device;
/** Link-layer address of preferred autoboot device, if known */
static uint8_t autoboot_ll_addr[MAX_LL_ADDR_LEN];
/** Device location of preferred autoboot device, if known */
static struct device_description autoboot_desc;
/** Autoboot device tester */
static int ( * is_autoboot_device ) ( struct net_device *netdev );
/* Disambiguate the various error causes */
#define ENOENT_BOOT __einfo_error ( EINFO_ENOENT_BOOT )
@ -422,15 +428,60 @@ int netboot ( struct net_device *netdev ) {
}
/**
* Test if network device matches the autoboot device location
* Test if network device matches the autoboot device bus type and location
*
* @v netdev Network device
* @ret is_autoboot Network device matches the autoboot device location
* @ret is_autoboot Network device matches the autoboot device
*/
static int is_autoboot_device ( struct net_device *netdev ) {
static int is_autoboot_busloc ( struct net_device *netdev ) {
return ( ( netdev->dev->desc.bus_type == autoboot_device.bus_type ) &&
( netdev->dev->desc.location == autoboot_device.location ) );
return ( ( netdev->dev->desc.bus_type == autoboot_desc.bus_type ) &&
( netdev->dev->desc.location == autoboot_desc.location ) );
}
/**
* Identify autoboot device by bus type and location
*
* @v bus_type Bus type
* @v location Location
*/
void set_autoboot_busloc ( unsigned int bus_type, unsigned int location ) {
/* Record autoboot device description */
autoboot_desc.bus_type = bus_type;
autoboot_desc.location = location;
/* Mark autoboot device as present */
is_autoboot_device = is_autoboot_busloc;
}
/**
* Test if network device matches the autoboot device link-layer address
*
* @v netdev Network device
* @ret is_autoboot Network device matches the autoboot device
*/
static int is_autoboot_ll_addr ( struct net_device *netdev ) {
return ( memcmp ( netdev->ll_addr, autoboot_ll_addr,
netdev->ll_protocol->ll_addr_len ) == 0 );
}
/**
* Identify autoboot device by link-layer address
*
* @v ll_addr Link-layer address
* @v len Length of link-layer address
*/
void set_autoboot_ll_addr ( const void *ll_addr, size_t len ) {
/* Record autoboot link-layer address (truncated if necessary) */
if ( len > sizeof ( autoboot_ll_addr ) )
len = sizeof ( autoboot_ll_addr );
memcpy ( autoboot_ll_addr, ll_addr, len );
/* Mark autoboot device as present */
is_autoboot_device = is_autoboot_ll_addr;
}
/**
@ -447,8 +498,7 @@ static int autoboot ( void ) {
for_each_netdev ( netdev ) {
/* Skip any non-matching devices, if applicable */
if ( autoboot_device.bus_type &&
( ! is_autoboot_device ( netdev ) ) )
if ( is_autoboot_device && ( ! is_autoboot_device ( netdev ) ) )
continue;
/* Attempt booting from this device */