external/gpl2/lvm2/dist/lib/format_text/layout.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   5  * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
   6  *
   7  * This file is part of LVM2.
   8  *
   9  * This copyrighted material is made available to anyone wishing to use,
  10  * modify, copy, or redistribute it subject to the terms and conditions
  11  * of the GNU Lesser General Public License v.2.1.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #ifndef _LVM_TEXT_LAYOUT_H
  19 #define _LVM_TEXT_LAYOUT_H
  20
  21 #include "config.h"
  22 #include "lvm-types.h"
  23 #include "metadata.h"
  24 #include "uuid.h"
  25
  26 /* On disk */
  27 struct disk_locn {
  28         uint64_t offset;        /* Offset in bytes to start sector */
  29         uint64_t size;          /* Bytes */
  30 } __attribute__ ((packed));
  31
  32 /* Data areas (holding PEs) */
  33 struct data_area_list {
  34         struct dm_list list;
  35         struct disk_locn disk_locn;
  36 };
  37
  38 /* Fields with the suffix _xl should be xlate'd wherever they appear */
  39 /* On disk */
  40 struct pv_header {
  41         int8_t pv_uuid[ID_LEN];
  42
  43         /* This size can be overridden if PV belongs to a VG */
  44         uint64_t device_size_xl;        /* Bytes */
  45
  46         /* NULL-terminated list of data areas followed by */
  47         /* NULL-terminated list of metadata area headers */
  48         struct disk_locn disk_areas_xl[0];      /* Two lists */
  49 } __attribute__ ((packed));
  50
  51 /* On disk */
  52 struct raw_locn {
  53         uint64_t offset;        /* Offset in bytes to start sector */
  54         uint64_t size;          /* Bytes */
  55         uint32_t checksum;
  56         uint32_t filler;
  57 } __attribute__ ((packed));
  58
  59 /* On disk */
  60 /* Structure size limited to one sector */
  61 struct mda_header {
  62         uint32_t checksum_xl;   /* Checksum of rest of mda_header */
  63         int8_t magic[16];       /* To aid scans for metadata */
  64         uint32_t version;
  65         uint64_t start;         /* Absolute start byte of mda_header */
  66         uint64_t size;          /* Size of metadata area */
  67
  68         struct raw_locn raw_locns[0];   /* NULL-terminated list */
  69 } __attribute__ ((packed));
  70
  71 struct mda_lists {
  72         struct dm_list dirs;
  73         struct dm_list raws;
  74         struct metadata_area_ops *file_ops;
  75         struct metadata_area_ops *raw_ops;
  76 };
  77
  78 struct mda_context {
  79         struct device_area area;
  80         uint64_t free_sectors;
  81         struct raw_locn rlocn;  /* Store inbetween write and commit */
  82 };
  83
  84 /* FIXME Convert this at runtime */
  85 #define FMTT_MAGIC "\040\114\126\115\062\040\170\133\065\101\045\162\060\116\052\076"
  86 #define FMTT_VERSION 1
  87 #define MDA_HEADER_SIZE 512
  88 #define LVM2_LABEL "LVM2 001"
  89 #define MDA_SIZE_MIN (8 * (unsigned) lvm_getpagesize())
  90
  91 #endif