gpxe/src/usr/iscsiboot.c

   1 #include <stdint.h>
   2 #include <string.h>
   3 #include <stdio.h>
   4 #include <gpxe/iscsi.h>
   5 #include <gpxe/settings.h>
   6 #include <gpxe/netdevice.h>
   7 #include <gpxe/ibft.h>
   8 #include <int13.h>
   9 #include <usr/iscsiboot.h>
  10
  11 /**
  12  * Guess boot network device
  13  *
  14  * @ret netdev          Boot network device
  15  */
  16 static struct net_device * guess_boot_netdev ( void ) {
  17         struct net_device *boot_netdev;
  18
  19         /* Just use the first network device */
  20         for_each_netdev ( boot_netdev ) {
  21                 return boot_netdev;
  22         }
  23
  24         return NULL;
  25 }
  26
  27 int iscsiboot ( const char *root_path ) {
  28         struct scsi_device scsi;
  29         struct int13_drive drive;
  30         int rc;
  31
  32         memset ( &scsi, 0, sizeof ( scsi ) );
  33         memset ( &drive, 0, sizeof ( drive ) );
  34
  35         printf ( "iSCSI booting from %s\n", root_path );
  36
  37         if ( ( rc = iscsi_attach ( &scsi, root_path ) ) != 0 ) {
  38                 printf ( "Could not attach iSCSI device: %s\n",
  39                          strerror ( rc ) );
  40                 goto error_attach;
  41         }
  42         if ( ( rc = init_scsidev ( &scsi ) ) != 0 ) {
  43                 printf ( "Could not initialise iSCSI device: %s\n",
  44                          strerror ( rc ) );
  45                 goto error_init;
  46         }
  47
  48         drive.blockdev = &scsi.blockdev;
  49
  50         /* FIXME: ugly, ugly hack */
  51         struct net_device *netdev = guess_boot_netdev();
  52         struct iscsi_session *iscsi =
  53                 container_of ( scsi.backend, struct iscsi_session, refcnt );
  54         ibft_fill_data ( netdev, iscsi );
  55
  56         register_int13_drive ( &drive );
  57         printf ( "Registered as BIOS drive %#02x\n", drive.drive );
  58         printf ( "Booting from BIOS drive %#02x\n", drive.drive );
  59         rc = int13_boot ( drive.drive );
  60         printf ( "Boot failed\n" );
  61
  62         printf ( "Unregistering BIOS drive %#02x\n", drive.drive );
  63         unregister_int13_drive ( &drive );
  64
  65  error_init:
  66         iscsi_detach ( &scsi );
  67  error_attach:
  68         return rc;
  69 }