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 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_LVM) += lvm.o
  22
  23 //config:
  24 //config:### config FEATURE_VOLUMEID_LVM
  25 //config:###    bool "lvm"
  26 //config:###    default y
  27 //config:###    depends on VOLUMEID
  28 //config:###    help
  29 //config:###      TODO
  30 //config:
  31
  32 #include "volume_id_internal.h"
  33
  34 struct lvm1_super_block {
  35         uint8_t id[2];
  36 } PACKED;
  37
  38 struct lvm2_super_block {
  39         uint8_t         id[8];
  40         uint64_t        sector_xl;
  41         uint32_t        crc_xl;
  42         uint32_t        offset_xl;
  43         uint8_t         type[8];
  44 } PACKED;
  45
  46 #define LVM1_SB_OFF                     0x400
  47
  48 int FAST_FUNC volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
  49 {
  50         struct lvm1_super_block *lvm;
  51
  52         dbg("probing at offset 0x%llx", (unsigned long long) off);
  53
  54         lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
  55         if (lvm == NULL)
  56                 return -1;
  57
  58         if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
  59                 return -1;
  60
  61 //      volume_id_set_usage(id, VOLUME_ID_RAID);
  62 //      id->type = "LVM1_member";
  63
  64         return 0;
  65 }
  66
  67 #define LVM2_LABEL_ID                   "LABELONE"
  68 #define LVM2LABEL_SCAN_SECTORS          4
  69
  70 int FAST_FUNC volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
  71 {
  72         const uint8_t *buf;
  73         unsigned soff;
  74         struct lvm2_super_block *lvm;
  75
  76         dbg("probing at offset 0x%llx", (unsigned long long) off);
  77
  78         buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
  79         if (buf == NULL)
  80                 return -1;
  81
  82
  83         for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
  84                 lvm = (struct lvm2_super_block *) &buf[soff];
  85
  86                 if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
  87                         goto found;
  88         }
  89
  90         return -1;
  91
  92  found:
  93 //      memcpy(id->type_version, lvm->type, 8);
  94 //      volume_id_set_usage(id, VOLUME_ID_RAID);
  95 //      id->type = "LVM2_member";
  96
  97         return 0;
  98 }