unused_lvm.c 2.2 KB

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  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. #include "volume_id_internal.h"
  21. struct lvm1_super_block {
  22. uint8_t id[2];
  23. } PACKED;
  24. struct lvm2_super_block {
  25. uint8_t id[8];
  26. uint64_t sector_xl;
  27. uint32_t crc_xl;
  28. uint32_t offset_xl;
  29. uint8_t type[8];
  30. } PACKED;
  31. #define LVM1_SB_OFF 0x400
  32. int FAST_FUNC volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
  33. {
  34. struct lvm1_super_block *lvm;
  35. dbg("probing at offset 0x%llx", (unsigned long long) off);
  36. lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
  37. if (lvm == NULL)
  38. return -1;
  39. if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
  40. return -1;
  41. // volume_id_set_usage(id, VOLUME_ID_RAID);
  42. // id->type = "LVM1_member";
  43. return 0;
  44. }
  45. #define LVM2_LABEL_ID "LABELONE"
  46. #define LVM2LABEL_SCAN_SECTORS 4
  47. int FAST_FUNC volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
  48. {
  49. const uint8_t *buf;
  50. unsigned soff;
  51. struct lvm2_super_block *lvm;
  52. dbg("probing at offset 0x%llx", (unsigned long long) off);
  53. buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
  54. if (buf == NULL)
  55. return -1;
  56. for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
  57. lvm = (struct lvm2_super_block *) &buf[soff];
  58. if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
  59. goto found;
  60. }
  61. return -1;
  62. found:
  63. // memcpy(id->type_version, lvm->type, 8);
  64. // volume_id_set_usage(id, VOLUME_ID_RAID);
  65. // id->type = "LVM2_member";
  66. return 0;
  67. }