source: MondoRescue/branches/3.3/mindi-busybox/util-linux/volume_id/unused_lvm.c@ 3621

/*
 * volume_id - reads filesystem label and uuid
 *
 * Copyright (C) 2004 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_LVM) += lvm.o

//config:
//config:### config FEATURE_VOLUMEID_LVM
//config:###    bool "lvm"
//config:###    default y
//config:###    depends on VOLUMEID
//config:###    help
//config:###      TODO
//config:

#include "volume_id_internal.h"

struct lvm1_super_block {
    uint8_t id[2];
} PACKED;

struct lvm2_super_block {
    uint8_t     id[8];
    uint64_t    sector_xl;
    uint32_t    crc_xl;
    uint32_t    offset_xl;
    uint8_t     type[8];
} PACKED;

#define LVM1_SB_OFF         0x400

int FAST_FUNC volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
{
    struct lvm1_super_block *lvm;

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

    lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
    if (lvm == NULL)
        return -1;

    if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
        return -1;

//  volume_id_set_usage(id, VOLUME_ID_RAID);
//  id->type = "LVM1_member";

    return 0;
}

#define LVM2_LABEL_ID           "LABELONE"
#define LVM2LABEL_SCAN_SECTORS      4

int FAST_FUNC volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
{
    const uint8_t *buf;
    unsigned soff;
    struct lvm2_super_block *lvm;

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

    buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
    if (buf == NULL)
        return -1;


    for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
        lvm = (struct lvm2_super_block *) &buf[soff];

        if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
            goto found;
    }

    return -1;

 found:
//  memcpy(id->type_version, lvm->type, 8);
//  volume_id_set_usage(id, VOLUME_ID_RAID);
//  id->type = "LVM2_member";

    return 0;
}