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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 "superblocks.h"
struct jm_metadata {
int8_t signature[2];
uint8_t minor_version;
uint8_t major_version;
uint16_t checksum;
};
#define JM_SIGNATURE "JM"
static int probe_jmraid(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
uint64_t off;
struct jm_metadata *jm;
if (pr->size < 0x10000)
return 1;
if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
return 1;
off = ((pr->size / 0x200) - 1) * 0x200;
jm = (struct jm_metadata *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct jm_metadata));
if (!jm)
return errno ? -errno : 1;
if (memcmp(jm->signature, JM_SIGNATURE, sizeof(JM_SIGNATURE) - 1) != 0)
return 1;
if (blkid_probe_sprintf_version(pr, "%u.%u",
jm->major_version, jm->minor_version) != 0)
return 1;
if (blkid_probe_set_magic(pr, off, sizeof(jm->signature),
(unsigned char *) jm->signature))
return 1;
return 0;
}
const struct blkid_idinfo jmraid_idinfo = {
.name = "jmicron_raid_member",
.usage = BLKID_USAGE_RAID,
.probefunc = probe_jmraid,
.magics = BLKID_NONE_MAGIC
};
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