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1 | /** |
2 | * ldm - Part of the Linux-NTFS project. |
3 | * |
4 | * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org> |
5 | * Copyright (c) 2001-2007 Anton Altaparmakov |
6 | * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com> |
7 | * |
8 | * Documentation is available at http://www.linux-ntfs.org/doku.php?id=downloads |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify it |
11 | * under the terms of the GNU General Public License as published by the Free |
12 | * Software Foundation; either version 2 of the License, or (at your option) |
13 | * any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 | * GNU General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with this program (in the main directory of the Linux-NTFS source |
22 | * in the file COPYING); if not, write to the Free Software Foundation, |
23 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
24 | */ |
25 | |
26 | #ifndef _FS_PT_LDM_H_ |
27 | #define _FS_PT_LDM_H_ |
28 | |
29 | #include <linux/types.h> |
30 | #include <linux/list.h> |
31 | #include <linux/genhd.h> |
32 | #include <linux/fs.h> |
33 | #include <asm/unaligned.h> |
34 | #include <asm/byteorder.h> |
35 | |
36 | struct parsed_partitions; |
37 | |
38 | /* Magic numbers in CPU format. */ |
39 | #define MAGIC_VMDB 0x564D4442 /* VMDB */ |
40 | #define MAGIC_VBLK 0x56424C4B /* VBLK */ |
41 | #define MAGIC_PRIVHEAD 0x5052495648454144ULL /* PRIVHEAD */ |
42 | #define MAGIC_TOCBLOCK 0x544F43424C4F434BULL /* TOCBLOCK */ |
43 | |
44 | /* The defined vblk types. */ |
45 | #define VBLK_VOL5 0x51 /* Volume, version 5 */ |
46 | #define VBLK_CMP3 0x32 /* Component, version 3 */ |
47 | #define VBLK_PRT3 0x33 /* Partition, version 3 */ |
48 | #define VBLK_DSK3 0x34 /* Disk, version 3 */ |
49 | #define VBLK_DSK4 0x44 /* Disk, version 4 */ |
50 | #define VBLK_DGR3 0x35 /* Disk Group, version 3 */ |
51 | #define VBLK_DGR4 0x45 /* Disk Group, version 4 */ |
52 | |
53 | /* vblk flags indicating extra information will be present */ |
54 | #define VBLK_FLAG_COMP_STRIPE 0x10 |
55 | #define VBLK_FLAG_PART_INDEX 0x08 |
56 | #define VBLK_FLAG_DGR3_IDS 0x08 |
57 | #define VBLK_FLAG_DGR4_IDS 0x08 |
58 | #define VBLK_FLAG_VOLU_ID1 0x08 |
59 | #define VBLK_FLAG_VOLU_ID2 0x20 |
60 | #define VBLK_FLAG_VOLU_SIZE 0x80 |
61 | #define VBLK_FLAG_VOLU_DRIVE 0x02 |
62 | |
63 | /* size of a vblk's static parts */ |
64 | #define VBLK_SIZE_HEAD 16 |
65 | #define VBLK_SIZE_CMP3 22 /* Name and version */ |
66 | #define VBLK_SIZE_DGR3 12 |
67 | #define VBLK_SIZE_DGR4 44 |
68 | #define VBLK_SIZE_DSK3 12 |
69 | #define VBLK_SIZE_DSK4 45 |
70 | #define VBLK_SIZE_PRT3 28 |
71 | #define VBLK_SIZE_VOL5 58 |
72 | |
73 | /* component types */ |
74 | #define COMP_STRIPE 0x01 /* Stripe-set */ |
75 | #define COMP_BASIC 0x02 /* Basic disk */ |
76 | #define COMP_RAID 0x03 /* Raid-set */ |
77 | |
78 | /* Other constants. */ |
79 | #define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */ |
80 | |
81 | #define OFF_PRIV1 6 /* Offset of the first privhead |
82 | relative to the start of the |
83 | device in sectors */ |
84 | |
85 | /* Offsets to structures within the LDM Database in sectors. */ |
86 | #define OFF_PRIV2 1856 /* Backup private headers. */ |
87 | #define OFF_PRIV3 2047 |
88 | |
89 | #define OFF_TOCB1 1 /* Tables of contents. */ |
90 | #define OFF_TOCB2 2 |
91 | #define OFF_TOCB3 2045 |
92 | #define OFF_TOCB4 2046 |
93 | |
94 | #define OFF_VMDB 17 /* List of partitions. */ |
95 | |
96 | #define LDM_PARTITION 0x42 /* Formerly SFS (Landis). */ |
97 | |
98 | #define TOC_BITMAP1 "config" /* Names of the two defined */ |
99 | #define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */ |
100 | |
101 | /* Borrowed from msdos.c */ |
102 | #define SYS_IND(p) (get_unaligned(&(p)->sys_ind)) |
103 | |
104 | struct frag { /* VBLK Fragment handling */ |
105 | struct list_head list; |
106 | u32 group; |
107 | u8 num; /* Total number of records */ |
108 | u8 rec; /* This is record number n */ |
109 | u8 map; /* Which portions are in use */ |
110 | u8 data[0]; |
111 | }; |
112 | |
113 | /* In memory LDM database structures. */ |
114 | |
115 | #define GUID_SIZE 16 |
116 | |
117 | struct privhead { /* Offsets and sizes are in sectors. */ |
118 | u16 ver_major; |
119 | u16 ver_minor; |
120 | u64 logical_disk_start; |
121 | u64 logical_disk_size; |
122 | u64 config_start; |
123 | u64 config_size; |
124 | u8 disk_id[GUID_SIZE]; |
125 | }; |
126 | |
127 | struct tocblock { /* We have exactly two bitmaps. */ |
128 | u8 bitmap1_name[16]; |
129 | u64 bitmap1_start; |
130 | u64 bitmap1_size; |
131 | u8 bitmap2_name[16]; |
132 | u64 bitmap2_start; |
133 | u64 bitmap2_size; |
134 | }; |
135 | |
136 | struct vmdb { /* VMDB: The database header */ |
137 | u16 ver_major; |
138 | u16 ver_minor; |
139 | u32 vblk_size; |
140 | u32 vblk_offset; |
141 | u32 last_vblk_seq; |
142 | }; |
143 | |
144 | struct vblk_comp { /* VBLK Component */ |
145 | u8 state[16]; |
146 | u64 parent_id; |
147 | u8 type; |
148 | u8 children; |
149 | u16 chunksize; |
150 | }; |
151 | |
152 | struct vblk_dgrp { /* VBLK Disk Group */ |
153 | u8 disk_id[64]; |
154 | }; |
155 | |
156 | struct vblk_disk { /* VBLK Disk */ |
157 | u8 disk_id[GUID_SIZE]; |
158 | u8 alt_name[128]; |
159 | }; |
160 | |
161 | struct vblk_part { /* VBLK Partition */ |
162 | u64 start; |
163 | u64 size; /* start, size and vol_off in sectors */ |
164 | u64 volume_offset; |
165 | u64 parent_id; |
166 | u64 disk_id; |
167 | u8 partnum; |
168 | }; |
169 | |
170 | struct vblk_volu { /* VBLK Volume */ |
171 | u8 volume_type[16]; |
172 | u8 volume_state[16]; |
173 | u8 guid[16]; |
174 | u8 drive_hint[4]; |
175 | u64 size; |
176 | u8 partition_type; |
177 | }; |
178 | |
179 | struct vblk_head { /* VBLK standard header */ |
180 | u32 group; |
181 | u16 rec; |
182 | u16 nrec; |
183 | }; |
184 | |
185 | struct vblk { /* Generalised VBLK */ |
186 | u8 name[64]; |
187 | u64 obj_id; |
188 | u32 sequence; |
189 | u8 flags; |
190 | u8 type; |
191 | union { |
192 | struct vblk_comp comp; |
193 | struct vblk_dgrp dgrp; |
194 | struct vblk_disk disk; |
195 | struct vblk_part part; |
196 | struct vblk_volu volu; |
197 | } vblk; |
198 | struct list_head list; |
199 | }; |
200 | |
201 | struct ldmdb { /* Cache of the database */ |
202 | struct privhead ph; |
203 | struct tocblock toc; |
204 | struct vmdb vm; |
205 | struct list_head v_dgrp; |
206 | struct list_head v_disk; |
207 | struct list_head v_volu; |
208 | struct list_head v_comp; |
209 | struct list_head v_part; |
210 | }; |
211 | |
212 | int ldm_partition(struct parsed_partitions *state); |
213 | |
214 | #endif /* _FS_PT_LDM_H_ */ |
215 | |
216 |
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