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 | |
21 | struct 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 | |
86 | struct 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 | |
97 | struct 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 | |
107 | struct 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 | |
116 | struct 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 | |
124 | struct vblk_comp { /* VBLK Component */ |
125 | u8 state[16]; |
126 | u64 parent_id; |
127 | u8 type; |
128 | u8 children; |
129 | u16 chunksize; |
130 | }; |
131 | |
132 | struct vblk_dgrp { /* VBLK Disk Group */ |
133 | u8 disk_id[64]; |
134 | }; |
135 | |
136 | struct vblk_disk { /* VBLK Disk */ |
137 | uuid_t disk_id; |
138 | u8 alt_name[128]; |
139 | }; |
140 | |
141 | struct 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 | |
150 | struct 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 | |
159 | struct vblk_head { /* VBLK standard header */ |
160 | u32 group; |
161 | u16 rec; |
162 | u16 nrec; |
163 | }; |
164 | |
165 | struct 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 | |
181 | struct 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 | |