LXR busybox/util-linux/volume_id/unused

   1/*
   2 * volume_id - reads filesystem label and uuid
   3 *
   4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
   5 *
   6 *      This library is free software; you can redistribute it and/or
   7 *      modify it under the terms of the GNU Lesser General Public
   8 *      License as published by the Free Software Foundation; either
   9 *      version 2.1 of the License, or (at your option) any later version.
  10 *
  11 *      This library is distributed in the hope that it will be useful,
  12 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14 *      Lesser General Public License for more details.
  15 *
  16 *      You should have received a copy of the GNU Lesser General Public
  17 *      License along with this library; if not, write to the Free Software
  18 *      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 */
  20
  21#include "volume_id_internal.h"
  22
  23struct lvm1_super_block {
  24        uint8_t id[2];
  25} __attribute__((packed));
  26
  27struct lvm2_super_block {
  28        uint8_t         id[8];
  29        uint64_t        sector_xl;
  30        uint32_t        crc_xl;
  31        uint32_t        offset_xl;
  32        uint8_t         type[8];
  33} __attribute__((packed));
  34
  35#define LVM1_SB_OFF                     0x400
  36
  37int volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
  38{
  39        struct lvm1_super_block *lvm;
  40
  41        dbg("probing at offset 0x%llx", (unsigned long long) off);
  42
  43        lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
  44        if (lvm == NULL)
  45                return -1;
  46
  47        if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
  48                return -1;
  49
  50//      volume_id_set_usage(id, VOLUME_ID_RAID);
  51//      id->type = "LVM1_member";
  52
  53        return 0;
  54}
  55
  56#define LVM2_LABEL_ID                   "LABELONE"
  57#define LVM2LABEL_SCAN_SECTORS          4
  58
  59int volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
  60{
  61        const uint8_t *buf;
  62        unsigned soff;
  63        struct lvm2_super_block *lvm;
  64
  65        dbg("probing at offset 0x%llx", (unsigned long long) off);
  66
  67        buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
  68        if (buf == NULL)
  69                return -1;
  70
  71
  72        for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
  73                lvm = (struct lvm2_super_block *) &buf[soff];
  74
  75                if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
  76                        goto found;
  77        }
  78
  79        return -1;
  80
  81 found:
  82//      memcpy(id->type_version, lvm->type, 8);
  83//      volume_id_set_usage(id, VOLUME_ID_RAID);
  84//      id->type = "LVM2_member";
  85
  86        return 0;
  87}
  88