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 <linux/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
194

source code of linux/block/partitions/ldm.h