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/*
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
*
* Inspired by libvolume_id by
* Kay Sievers <kay.sievers@vrfy.org>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <stdint.h>
#include "superblocks.h"
struct promise_metadata {
uint8_t sig[24];
};
#define PDC_CONFIG_OFF 0x1200
#define PDC_SIGNATURE "Promise Technology, Inc."
static int probe_pdcraid(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
size_t i;
static unsigned int sectors[] = {
63, 255, 256, 16, 399, 591, 675, 735, 911, 974, 991, 951, 3087
};
uint64_t nsectors;
if (pr->size < 0x40000)
return 1;
if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
return 1;
nsectors = pr->size >> 9;
for (i = 0; i < ARRAY_SIZE(sectors); i++) {
uint64_t off;
struct promise_metadata *pdc;
if (nsectors < sectors[i])
return 1;
off = (nsectors - sectors[i]) << 9;
pdc = (struct promise_metadata *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct promise_metadata));
if (!pdc)
return errno ? -errno : 1;
if (memcmp(pdc->sig, PDC_SIGNATURE,
sizeof(PDC_SIGNATURE) - 1) == 0) {
if (blkid_probe_set_magic(pr, off, sizeof(pdc->sig),
(unsigned char *) pdc->sig))
return 1;
return 0;
}
}
return 1;
}
const struct blkid_idinfo pdcraid_idinfo = {
.name = "promise_fasttrack_raid_member",
.usage = BLKID_USAGE_RAID,
.probefunc = probe_pdcraid,
.magics = BLKID_NONE_MAGIC
};
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