release/src/router/busybox/util-linux/volume_id/unused_lvm.c

   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
  23 struct lvm1_super_block {
  24         uint8_t id[2];
  25 } PACKED;
  26
  27 struct 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 } PACKED;
  34
  35 #define LVM1_SB_OFF                     0x400
  36
  37 int FAST_FUNC 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
  59 int FAST_FUNC 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 }