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/*
* 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 }
}
};
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