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#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <gpxe/iscsi.h>
#include <gpxe/settings.h>
#include <gpxe/dhcp.h>
#include <gpxe/netdevice.h>
#include <gpxe/ibft.h>
#include <gpxe/init.h>
#include <int13.h>
#include <usr/autoboot.h>
#include <usr/iscsiboot.h>
struct setting keep_san_setting __setting = {
.name = "keep-san",
.description = "Preserve SAN connection",
.tag = DHCP_EB_KEEP_SAN,
.type = &setting_type_int8,
};
/**
* Guess boot network device
*
* @ret netdev Boot network device
*/
static struct net_device * guess_boot_netdev ( void ) {
struct net_device *boot_netdev;
/* Just use the first network device */
for_each_netdev ( boot_netdev ) {
return boot_netdev;
}
return NULL;
}
int iscsiboot ( const char *root_path ) {
struct scsi_device *scsi;
struct int13_drive *drive;
int keep_san;
int rc;
scsi = zalloc ( sizeof ( *scsi ) );
if ( ! scsi ) {
rc = -ENOMEM;
goto err_alloc_scsi;
}
drive = zalloc ( sizeof ( *drive ) );
if ( ! drive ) {
rc = -ENOMEM;
goto err_alloc_drive;
}
printf ( "iSCSI booting from %s\n", root_path );
if ( ( rc = iscsi_attach ( scsi, root_path ) ) != 0 ) {
printf ( "Could not attach iSCSI device: %s\n",
strerror ( rc ) );
goto err_attach;
}
if ( ( rc = init_scsidev ( scsi ) ) != 0 ) {
printf ( "Could not initialise iSCSI device: %s\n",
strerror ( rc ) );
goto err_init;
}
drive->blockdev = &scsi->blockdev;
/* FIXME: ugly, ugly hack */
struct net_device *netdev = guess_boot_netdev();
struct iscsi_session *iscsi =
container_of ( scsi->backend, struct iscsi_session, refcnt );
ibft_fill_data ( netdev, iscsi );
register_int13_drive ( drive );
printf ( "Registered as BIOS drive %#02x\n", drive->drive );
printf ( "Booting from BIOS drive %#02x\n", drive->drive );
rc = int13_boot ( drive->drive );
printf ( "Boot failed\n" );
/* Leave drive registered, if instructed to do so */
keep_san = fetch_intz_setting ( NULL, &keep_san_setting );
if ( keep_san ) {
printf ( "Preserving connection to SAN disk\n" );
shutdown_exit_flags |= SHUTDOWN_KEEP_DEVICES;
return rc;
}
printf ( "Unregistering BIOS drive %#02x\n", drive->drive );
unregister_int13_drive ( drive );
err_init:
iscsi_detach ( scsi );
err_attach:
free ( drive );
err_alloc_drive:
free ( scsi );
err_alloc_scsi:
return rc;
}
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