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

   1 /*
   2  * volume_id - reads filesystem label and uuid
   3  *
   4  * Copyright (C) 2005 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 via_meta {
  24         uint16_t        signature;
  25         uint8_t         version_number;
  26         struct via_array {
  27                 uint16_t        disk_bits;
  28                 uint8_t         disk_array_ex;
  29                 uint32_t        capacity_low;
  30                 uint32_t        capacity_high;
  31                 uint32_t        serial_checksum;
  32         } PACKED array;
  33         uint32_t        serial_checksum[8];
  34         uint8_t         checksum;
  35 } PACKED;
  36
  37 #define VIA_SIGNATURE           0xAA55
  38
  39 int FAST_FUNC volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
  40 {
  41         uint64_t meta_off;
  42         struct via_meta *via;
  43
  44         dbg("probing at offset 0x%llx, size 0x%llx",
  45             (unsigned long long) off, (unsigned long long) size);
  46
  47         if (size < 0x10000)
  48                 return -1;
  49
  50         meta_off = ((size / 0x200)-1) * 0x200;
  51
  52         via = volume_id_get_buffer(id, off + meta_off, 0x200);
  53         if (via == NULL)
  54                 return -1;
  55
  56         if (via->signature != cpu_to_le16(VIA_SIGNATURE))
  57                 return -1;
  58
  59         if (via->version_number > 1)
  60                 return -1;
  61
  62 //      volume_id_set_usage(id, VOLUME_ID_RAID);
  63 //      id->type_version[0] = '0' + via->version_number;
  64 //      id->type_version[1] = '\0';
  65 //      id->type = "via_raid_member";
  66
  67         return 0;
  68 }