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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 <stdint.h>
#include "blkidP.h"
/* http://www.snia.org/standards/home */
#define DDF_GUID_LENGTH 24
#define DDF_REV_LENGTH 8
struct ddf_header {
uint8_t signature[4];
uint32_t crc;
uint8_t guid[DDF_GUID_LENGTH];
uint8_t ddf_rev[DDF_REV_LENGTH];
} __attribute__((packed));
static int probe_ddf(blkid_probe pr, const struct blkid_idmag *mag)
{
int hdrs[] = { 1, 257 };
int i;
struct ddf_header *ddf = NULL;
char version[DDF_REV_LENGTH + 1];
if (pr->size < 0x30000)
return -1;
for (i = 0; i < ARRAY_SIZE(hdrs); i++) {
uint64_t off = ((pr->size / 0x200) - hdrs[i]) * 0x200;
ddf = (struct ddf_header *) blkid_probe_get_buffer(pr,
off,
sizeof(struct ddf_header));
if (!ddf)
return -1;
if (memcmp(ddf->signature, "\x11\xde\x11\xde", 4) == 0 ||
memcmp(ddf->signature, "\xde\x11\xde\x11", 4) == 0)
break;
ddf = NULL;
}
if (!ddf)
return -1;
blkid_probe_strncpy_uuid(pr, ddf->guid, sizeof(ddf->guid));
memcpy(version, ddf->ddf_rev, sizeof(ddf->ddf_rev));
*(version + sizeof(ddf->ddf_rev)) = '\0';
if (blkid_probe_set_version(pr, version) != 0)
return -1;
return 0;
}
const struct blkid_idinfo ddfraid_idinfo = {
.name = "ddf_raid_member",
.usage = BLKID_USAGE_RAID,
.probefunc = probe_ddf,
.magics = BLKID_NONE_MAGIC
};
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