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unused_via_raid.c 2.0 KB

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  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. //config:### config FEATURE_VOLUMEID_VIARAID
  21. //config:### bool "via raid"
  22. //config:### default y
  23. //config:### depends on VOLUMEID
  24. //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_VIARAID) += via_raid.o
  25. #include "volume_id_internal.h"
  26. struct via_meta {
  27. uint16_t signature;
  28. uint8_t version_number;
  29. struct via_array {
  30. uint16_t disk_bits;
  31. uint8_t disk_array_ex;
  32. uint32_t capacity_low;
  33. uint32_t capacity_high;
  34. uint32_t serial_checksum;
  35. } PACKED array;
  36. uint32_t serial_checksum[8];
  37. uint8_t checksum;
  38. } PACKED;
  39. #define VIA_SIGNATURE 0xAA55
  40. int FAST_FUNC volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
  41. {
  42. uint64_t meta_off;
  43. struct via_meta *via;
  44. dbg("probing at offset 0x%llx, size 0x%llx",
  45. (unsigned long long) off, (unsigned long long) size);
  46. if (size < 0x10000)
  47. return -1;
  48. meta_off = ((size / 0x200)-1) * 0x200;
  49. via = volume_id_get_buffer(id, off + meta_off, 0x200);
  50. if (via == NULL)
  51. return -1;
  52. if (via->signature != cpu_to_le16(VIA_SIGNATURE))
  53. return -1;
  54. if (via->version_number > 1)
  55. return -1;
  56. // volume_id_set_usage(id, VOLUME_ID_RAID);
  57. // id->type_version[0] = '0' + via->version_number;
  58. // id->type_version[1] = '\0';
  59. // id->type = "via_raid_member";
  60. return 0;
  61. }