1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ldm - Part of the Linux-NTFS project.
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>
9 * Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads
15 #include <linux/types.h>
16 #include <linux/list.h>
18 #include <asm/unaligned.h>
19 #include <asm/byteorder.h>
21 struct parsed_partitions;
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 */
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 */
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
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
59 #define COMP_STRIPE 0x01 /* Stripe-set */
60 #define COMP_BASIC 0x02 /* Basic disk */
61 #define COMP_RAID 0x03 /* Raid-set */
63 /* Other constants. */
64 #define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */
66 #define OFF_PRIV1 6 /* Offset of the first privhead
67 relative to the start of the
70 /* Offsets to structures within the LDM Database in sectors. */
71 #define OFF_PRIV2 1856 /* Backup private headers. */
72 #define OFF_PRIV3 2047
74 #define OFF_TOCB1 1 /* Tables of contents. */
76 #define OFF_TOCB3 2045
77 #define OFF_TOCB4 2046
79 #define OFF_VMDB 17 /* List of partitions. */
81 #define LDM_PARTITION 0x42 /* Formerly SFS (Landis). */
83 #define TOC_BITMAP1 "config" /* Names of the two defined */
84 #define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */
86 struct frag { /* VBLK Fragment handling */
87 struct list_head list;
89 u8 num; /* Total number of records */
90 u8 rec; /* This is record number n */
91 u8 map; /* Which portions are in use */
95 /* In memory LDM database structures. */
97 struct privhead { /* Offsets and sizes are in sectors. */
100 u64 logical_disk_start;
101 u64 logical_disk_size;
107 struct tocblock { /* We have exactly two bitmaps. */
116 struct vmdb { /* VMDB: The database header */
124 struct vblk_comp { /* VBLK Component */
132 struct vblk_dgrp { /* VBLK Disk Group */
136 struct vblk_disk { /* VBLK Disk */
141 struct vblk_part { /* VBLK Partition */
143 u64 size; /* start, size and vol_off in sectors */
150 struct vblk_volu { /* VBLK Volume */
159 struct vblk_head { /* VBLK standard header */
165 struct vblk { /* Generalised VBLK */
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;
178 struct list_head list;
181 struct ldmdb { /* Cache of the database */
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;
192 #endif /* _FS_PT_LDM_H_ */