source: MondoRescue/branches/3.3/mindi-busybox/util-linux/volume_id/unused_via_raid.c@ 3865

/*
 * volume_id - reads filesystem label and uuid
 *
 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

//kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_VIARAID) += via_raid.o

//config:
//config:### config FEATURE_VOLUMEID_VIARAID
//config:###    bool "via raid"
//config:###    default y
//config:###    depends on VOLUMEID
//config:###    help
//config:###      TODO
//config:

#include "volume_id_internal.h"

struct via_meta {
    uint16_t    signature;
    uint8_t     version_number;
    struct via_array {
        uint16_t    disk_bits;
        uint8_t     disk_array_ex;
        uint32_t    capacity_low;
        uint32_t    capacity_high;
        uint32_t    serial_checksum;
    } PACKED array;
    uint32_t    serial_checksum[8];
    uint8_t     checksum;
} PACKED;

#define VIA_SIGNATURE       0xAA55

int FAST_FUNC volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
{
    uint64_t meta_off;
    struct via_meta *via;

    dbg("probing at offset 0x%llx, size 0x%llx",
        (unsigned long long) off, (unsigned long long) size);

    if (size < 0x10000)
        return -1;

    meta_off = ((size / 0x200)-1) * 0x200;

    via = volume_id_get_buffer(id, off + meta_off, 0x200);
    if (via == NULL)
        return -1;

    if (via->signature != cpu_to_le16(VIA_SIGNATURE))
        return -1;

    if (via->version_number > 1)
        return -1;

//  volume_id_set_usage(id, VOLUME_ID_RAID);
//  id->type_version[0] = '0' + via->version_number;
//  id->type_version[1] = '\0';
//  id->type = "via_raid_member";

    return 0;
}