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/*
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
* Copyright (C) 2004-2006 Heinz Mauelshagen, Red Hat GmbH
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <stdint.h>
#include "blkidP.h"
struct via_meta {
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;
} array;
uint32_t serial_checksum[8];
uint8_t checksum;
};
#define VIA_SIGNATURE 0xAA55
/* 8 bit checksum on first 50 bytes of metadata. */
static uint8_t meta_checksum(struct via_meta *via)
{
uint8_t i = 50, sum = 0;
while (i--)
sum += ((uint8_t*) via)[i];
return sum == via->checksum;
}
static int probe_viaraid(blkid_probe pr, const struct blkid_idmag *mag)
{
uint64_t meta_off;
struct via_meta *via;
if (pr->size < 0x10000)
return -1;
meta_off = ((pr->size / 0x200)-1) * 0x200;
via = (struct via_meta *) blkid_probe_get_buffer(pr, meta_off, 0x200);
if (!via)
return -1;
if (le16_to_cpu(via->signature) != VIA_SIGNATURE)
return -1;
if (via->version_number > 1)
return -1;
if (!meta_checksum(via))
return -1;
if (blkid_probe_sprintf_version(pr, "%u", via->version_number) != 0)
return -1;
return 0;
}
const struct blkid_idinfo viaraid_idinfo = {
.name = "via_raid_member",
.usage = BLKID_USAGE_RAID,
.probefunc = probe_viaraid
};
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