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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 via_metadata {
uint16_t signature;
uint8_t version_number;
struct via_array {
uint16_t disk_bit_mask;
uint8_t disk_array_ex;
uint32_t capacity_low;
uint32_t capacity_high;
uint32_t serial_checksum;
} __attribute__((packed)) array;
uint32_t serial_checksum[8];
uint8_t checksum;
} __attribute__((packed));
#define VIA_SIGNATURE 0xAA55
/* 8 bit checksum on first 50 bytes of metadata. */
static uint8_t via_checksum(struct via_metadata *v)
{
uint8_t i = 50, cs = 0;
while (i--)
cs += ((uint8_t*) v)[i];
return cs;
}
static int probe_viaraid(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
uint64_t off;
struct via_metadata *v;
if (pr->size < 0x10000)
return 1;
if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
return 1;
off = ((pr->size / 0x200)-1) * 0x200;
v = (struct via_metadata *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct via_metadata));
if (!v)
return errno ? -errno : 1;
if (le16_to_cpu(v->signature) != VIA_SIGNATURE)
return 1;
if (v->version_number > 2)
return 1;
if (!blkid_probe_verify_csum(pr, via_checksum(v), v->checksum))
return 1;
if (blkid_probe_sprintf_version(pr, "%u", v->version_number) != 0)
return 1;
if (blkid_probe_set_magic(pr, off,
sizeof(v->signature),
(unsigned char *) &v->signature))
return 1;
return 0;
}
const struct blkid_idinfo viaraid_idinfo = {
.name = "via_raid_member",
.usage = BLKID_USAGE_RAID,
.probefunc = probe_viaraid,
.magics = BLKID_NONE_MAGIC
};
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