/*

 * sgi partition parsing code

 *

 * Copyright (C) 2009 Karel Zak <kzak@redhat.com>

 *

 * This file may be redistributed under the terms of the

 * GNU Lesser General Public License.

 *

 */

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <stdint.h>

#include "partitions.h"

#include "pt-sgi.h"

static int probe_sgi_pt(blkid_probe pr,

    const struct blkid_idmag *mag __attribute__((__unused__)))

{

  struct sgi_disklabel *l;

  struct sgi_partition *p;

  blkid_parttable tab = NULL;

  blkid_partlist ls;

  int i;

  l = (struct sgi_disklabel *) blkid_probe_get_sector(pr, 0);

  if (!l) {

    if (errno)

      return -errno;

    goto nothing;

  }

  if (!blkid_probe_verify_csum(pr, sgi_pt_checksum(l), 0)) {

    DBG(LOWPROBE, ul_debug(

      "detected corrupted sgi disk label -- ignore"));

    goto nothing;

  }

  if (blkid_partitions_need_typeonly(pr))

    /* caller does not ask for details about partitions */

    return BLKID_PROBE_OK;

  ls = blkid_probe_get_partlist(pr);

  if (!ls)

    goto nothing;

  tab = blkid_partlist_new_parttable(ls, "sgi", 0);

  if (!tab)

    goto err;

  for(i = 0, p = &l->partitions[0]; i < SGI_MAXPARTITIONS; i++, p++) {

    uint32_t size = be32_to_cpu(p->num_blocks);

    uint32_t start = be32_to_cpu(p->first_block);

    uint32_t type = be32_to_cpu(p->type);

    blkid_partition par;

    if (!size) {

      blkid_partlist_increment_partno(ls);

      continue;

    }

    par = blkid_partlist_add_partition(ls, tab, start, size);

    if (!par)

      goto err;

    blkid_partition_set_type(par, type);

  }

  return BLKID_PROBE_OK;

nothing:

  return BLKID_PROBE_NONE;

err:

  return -ENOMEM;

}

const struct blkid_idinfo sgi_pt_idinfo =

{

  .name   = "sgi",

  .probefunc  = probe_sgi_pt,

  .magics   =

  {

    { .magic = "\x0B\xE5\xA9\x41", .len = 4 },

    { NULL }

  }

};