arch/all-pc/boot/grub2-aros/include/grub/lvm.h

   1 /* lvm.h - On disk structures for LVM. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2006,2007  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB 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
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef GRUB_LVM_H
  21 #define GRUB_LVM_H      1
  22
  23 #include <grub/types.h>
  24 #include <grub/diskfilter.h>
  25
  26 /* Length of ID string, excluding terminating zero. */
  27 #define GRUB_LVM_ID_STRLEN 38
  28
  29 #define GRUB_LVM_LABEL_SIZE GRUB_DISK_SECTOR_SIZE
  30 #define GRUB_LVM_LABEL_SCAN_SECTORS 4L
  31
  32 #define GRUB_LVM_LABEL_ID "LABELONE"
  33 #define GRUB_LVM_LVM2_LABEL "LVM2 001"
  34
  35 #define GRUB_LVM_ID_LEN 32
  36
  37 /* On disk - 32 bytes */
  38 struct grub_lvm_label_header {
  39   grub_int8_t id[8];            /* LABELONE */
  40   grub_uint64_t sector_xl;      /* Sector number of this label */
  41   grub_uint32_t crc_xl;         /* From next field to end of sector */
  42   grub_uint32_t offset_xl;      /* Offset from start of struct to contents */
  43   grub_int8_t type[8];          /* LVM2 001 */
  44 } GRUB_PACKED;
  45
  46 /* On disk */
  47 struct grub_lvm_disk_locn {
  48   grub_uint64_t offset;         /* Offset in bytes to start sector */
  49   grub_uint64_t size;           /* Bytes */
  50 } GRUB_PACKED;
  51
  52 /* Fields with the suffix _xl should be xlate'd wherever they appear */
  53 /* On disk */
  54 struct grub_lvm_pv_header {
  55   grub_int8_t pv_uuid[GRUB_LVM_ID_LEN];
  56
  57   /* This size can be overridden if PV belongs to a VG */
  58   grub_uint64_t device_size_xl; /* Bytes */
  59
  60   /* NULL-terminated list of data areas followed by */
  61   /* NULL-terminated list of metadata area headers */
  62   struct grub_lvm_disk_locn disk_areas_xl[0];   /* Two lists */
  63 } GRUB_PACKED;
  64
  65 #define GRUB_LVM_FMTT_MAGIC "\040\114\126\115\062\040\170\133\065\101\045\162\060\116\052\076"
  66 #define GRUB_LVM_FMTT_VERSION 1
  67 #define GRUB_LVM_MDA_HEADER_SIZE 512
  68
  69 /* On disk */
  70 struct grub_lvm_raw_locn {
  71   grub_uint64_t offset;         /* Offset in bytes to start sector */
  72   grub_uint64_t size;           /* Bytes */
  73   grub_uint32_t checksum;
  74   grub_uint32_t filler;
  75 } GRUB_PACKED;
  76
  77 /* On disk */
  78 /* Structure size limited to one sector */
  79 struct grub_lvm_mda_header {
  80   grub_uint32_t checksum_xl;    /* Checksum of rest of mda_header */
  81   grub_int8_t magic[16];        /* To aid scans for metadata */
  82   grub_uint32_t version;
  83   grub_uint64_t start;          /* Absolute start byte of mda_header */
  84   grub_uint64_t size;           /* Size of metadata area */
  85
  86   struct grub_lvm_raw_locn raw_locns[0];        /* NULL-terminated list */
  87 } GRUB_PACKED;
  88
  89
  90 #endif /* ! GRUB_LVM_H */