src/arch/i386/interface/pcbios/iscsiboot.c

   1 #include <stdint.h>
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <errno.h>
   6 #include <gpxe/iscsi.h>
   7 #include <gpxe/netdevice.h>
   8 #include <gpxe/ibft.h>
   9 #include <gpxe/sanboot.h>
  10 #include <int13.h>
  11
  12 FILE_LICENCE ( GPL2_OR_LATER );
  13
  14 static int iscsiboot ( const char *root_path ) {
  15         struct scsi_device *scsi;
  16         struct int13_drive *drive;
  17         int rc;
  18
  19         scsi = zalloc ( sizeof ( *scsi ) );
  20         if ( ! scsi ) {
  21                 rc = -ENOMEM;
  22                 goto err_alloc_scsi;
  23         }
  24         drive = zalloc ( sizeof ( *drive ) );
  25         if ( ! drive ) {
  26                 rc = -ENOMEM;
  27                 goto err_alloc_drive;
  28         }
  29
  30         if ( ( rc = iscsi_attach ( scsi, root_path ) ) != 0 ) {
  31                 printf ( "Could not attach iSCSI device: %s\n",
  32                          strerror ( rc ) );
  33                 goto err_attach;
  34         }
  35         if ( ( rc = init_scsidev ( scsi ) ) != 0 ) {
  36                 printf ( "Could not initialise iSCSI device: %s\n",
  37                          strerror ( rc ) );
  38                 goto err_init;
  39         }
  40
  41         drive->blockdev = &scsi->blockdev;
  42
  43         /* FIXME: ugly, ugly hack */
  44         struct net_device *netdev = last_opened_netdev();
  45         struct iscsi_session *iscsi =
  46                 container_of ( scsi->backend, struct iscsi_session, refcnt );
  47         ibft_fill_data ( netdev, iscsi );
  48
  49         register_int13_drive ( drive );
  50         printf ( "Registered as BIOS drive %#02x\n", drive->drive );
  51         printf ( "Booting from BIOS drive %#02x\n", drive->drive );
  52         rc = int13_boot ( drive->drive );
  53         printf ( "Boot failed\n" );
  54
  55         /* Leave drive registered, if instructed to do so */
  56         if ( keep_san() )
  57                 return rc;
  58
  59         printf ( "Unregistering BIOS drive %#02x\n", drive->drive );
  60         unregister_int13_drive ( drive );
  61
  62  err_init:
  63         iscsi_detach ( scsi );
  64  err_attach:
  65         free ( drive );
  66  err_alloc_drive:
  67         free ( scsi );
  68  err_alloc_scsi:
  69         return rc;
  70 }
  71
  72 struct sanboot_protocol iscsi_sanboot_protocol __sanboot_protocol = {
  73         .prefix = "iscsi:",
  74         .boot = iscsiboot,
  75 };