ldm.h (4641B)
1// SPDX-License-Identifier: GPL-2.0-or-later 2/** 3 * ldm - Part of the Linux-NTFS project. 4 * 5 * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org> 6 * Copyright (c) 2001-2007 Anton Altaparmakov 7 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com> 8 * 9 * Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads 10 */ 11 12#ifndef _FS_PT_LDM_H_ 13#define _FS_PT_LDM_H_ 14 15#include <linux/types.h> 16#include <linux/list.h> 17#include <linux/fs.h> 18#include <asm/unaligned.h> 19#include <asm/byteorder.h> 20 21struct parsed_partitions; 22 23/* Magic numbers in CPU format. */ 24#define MAGIC_VMDB 0x564D4442 /* VMDB */ 25#define MAGIC_VBLK 0x56424C4B /* VBLK */ 26#define MAGIC_PRIVHEAD 0x5052495648454144ULL /* PRIVHEAD */ 27#define MAGIC_TOCBLOCK 0x544F43424C4F434BULL /* TOCBLOCK */ 28 29/* The defined vblk types. */ 30#define VBLK_VOL5 0x51 /* Volume, version 5 */ 31#define VBLK_CMP3 0x32 /* Component, version 3 */ 32#define VBLK_PRT3 0x33 /* Partition, version 3 */ 33#define VBLK_DSK3 0x34 /* Disk, version 3 */ 34#define VBLK_DSK4 0x44 /* Disk, version 4 */ 35#define VBLK_DGR3 0x35 /* Disk Group, version 3 */ 36#define VBLK_DGR4 0x45 /* Disk Group, version 4 */ 37 38/* vblk flags indicating extra information will be present */ 39#define VBLK_FLAG_COMP_STRIPE 0x10 40#define VBLK_FLAG_PART_INDEX 0x08 41#define VBLK_FLAG_DGR3_IDS 0x08 42#define VBLK_FLAG_DGR4_IDS 0x08 43#define VBLK_FLAG_VOLU_ID1 0x08 44#define VBLK_FLAG_VOLU_ID2 0x20 45#define VBLK_FLAG_VOLU_SIZE 0x80 46#define VBLK_FLAG_VOLU_DRIVE 0x02 47 48/* size of a vblk's static parts */ 49#define VBLK_SIZE_HEAD 16 50#define VBLK_SIZE_CMP3 22 /* Name and version */ 51#define VBLK_SIZE_DGR3 12 52#define VBLK_SIZE_DGR4 44 53#define VBLK_SIZE_DSK3 12 54#define VBLK_SIZE_DSK4 45 55#define VBLK_SIZE_PRT3 28 56#define VBLK_SIZE_VOL5 58 57 58/* component types */ 59#define COMP_STRIPE 0x01 /* Stripe-set */ 60#define COMP_BASIC 0x02 /* Basic disk */ 61#define COMP_RAID 0x03 /* Raid-set */ 62 63/* Other constants. */ 64#define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */ 65 66#define OFF_PRIV1 6 /* Offset of the first privhead 67 relative to the start of the 68 device in sectors */ 69 70/* Offsets to structures within the LDM Database in sectors. */ 71#define OFF_PRIV2 1856 /* Backup private headers. */ 72#define OFF_PRIV3 2047 73 74#define OFF_TOCB1 1 /* Tables of contents. */ 75#define OFF_TOCB2 2 76#define OFF_TOCB3 2045 77#define OFF_TOCB4 2046 78 79#define OFF_VMDB 17 /* List of partitions. */ 80 81#define LDM_PARTITION 0x42 /* Formerly SFS (Landis). */ 82 83#define TOC_BITMAP1 "config" /* Names of the two defined */ 84#define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */ 85 86struct frag { /* VBLK Fragment handling */ 87 struct list_head list; 88 u32 group; 89 u8 num; /* Total number of records */ 90 u8 rec; /* This is record number n */ 91 u8 map; /* Which portions are in use */ 92 u8 data[]; 93}; 94 95/* In memory LDM database structures. */ 96 97struct privhead { /* Offsets and sizes are in sectors. */ 98 u16 ver_major; 99 u16 ver_minor; 100 u64 logical_disk_start; 101 u64 logical_disk_size; 102 u64 config_start; 103 u64 config_size; 104 uuid_t disk_id; 105}; 106 107struct tocblock { /* We have exactly two bitmaps. */ 108 u8 bitmap1_name[16]; 109 u64 bitmap1_start; 110 u64 bitmap1_size; 111 u8 bitmap2_name[16]; 112 u64 bitmap2_start; 113 u64 bitmap2_size; 114}; 115 116struct vmdb { /* VMDB: The database header */ 117 u16 ver_major; 118 u16 ver_minor; 119 u32 vblk_size; 120 u32 vblk_offset; 121 u32 last_vblk_seq; 122}; 123 124struct vblk_comp { /* VBLK Component */ 125 u8 state[16]; 126 u64 parent_id; 127 u8 type; 128 u8 children; 129 u16 chunksize; 130}; 131 132struct vblk_dgrp { /* VBLK Disk Group */ 133 u8 disk_id[64]; 134}; 135 136struct vblk_disk { /* VBLK Disk */ 137 uuid_t disk_id; 138 u8 alt_name[128]; 139}; 140 141struct vblk_part { /* VBLK Partition */ 142 u64 start; 143 u64 size; /* start, size and vol_off in sectors */ 144 u64 volume_offset; 145 u64 parent_id; 146 u64 disk_id; 147 u8 partnum; 148}; 149 150struct vblk_volu { /* VBLK Volume */ 151 u8 volume_type[16]; 152 u8 volume_state[16]; 153 u8 guid[16]; 154 u8 drive_hint[4]; 155 u64 size; 156 u8 partition_type; 157}; 158 159struct vblk_head { /* VBLK standard header */ 160 u32 group; 161 u16 rec; 162 u16 nrec; 163}; 164 165struct vblk { /* Generalised VBLK */ 166 u8 name[64]; 167 u64 obj_id; 168 u32 sequence; 169 u8 flags; 170 u8 type; 171 union { 172 struct vblk_comp comp; 173 struct vblk_dgrp dgrp; 174 struct vblk_disk disk; 175 struct vblk_part part; 176 struct vblk_volu volu; 177 } vblk; 178 struct list_head list; 179}; 180 181struct ldmdb { /* Cache of the database */ 182 struct privhead ph; 183 struct tocblock toc; 184 struct vmdb vm; 185 struct list_head v_dgrp; 186 struct list_head v_disk; 187 struct list_head v_volu; 188 struct list_head v_comp; 189 struct list_head v_part; 190}; 191 192#endif /* _FS_PT_LDM_H_ */ 193