ib_srpboot.c

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#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <gpxe/sanboot.h>
#include <int13.h>
#include <gpxe/srp.h>
#include <gpxe/sbft.h>

FILE_LICENCE ( GPL2_OR_LATER );

static int ib_srpboot ( const char *root_path ) {
        struct scsi_device *scsi;
        struct int13_drive *drive;
        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;
        }

        if ( ( rc = srp_attach ( scsi, root_path ) ) != 0 ) {
                printf ( "Could not attach IB_SRP device: %s\n",
                         strerror ( rc ) );
                goto err_attach;
        }
        if ( ( rc = init_scsidev ( scsi ) ) != 0 ) {
                printf ( "Could not initialise IB_SRP device: %s\n",
                         strerror ( rc ) );
                goto err_init;
        }

        drive->blockdev = &scsi->blockdev;

        /* FIXME: ugly, ugly hack */
        struct srp_device *srp =
                container_of ( scsi->backend, struct srp_device, refcnt );
        sbft_fill_data ( srp );

        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 */
        if ( keep_san() )
                return rc;

        printf ( "Unregistering BIOS drive %#02x\n", drive->drive );
        unregister_int13_drive ( drive );

 err_init:
        srp_detach ( scsi );
 err_attach:
        free ( drive );
 err_alloc_drive:
        free ( scsi );
 err_alloc_scsi:
        return rc;
}

struct sanboot_protocol ib_srp_sanboot_protocol __sanboot_protocol = {
        .prefix = "ib_srp:",
        .boot = ib_srpboot,
};