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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 Anton Altaparmakov <aia21@cantab.net>
6 * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
7 *
8 * Documentation is available at http://linux-ntfs.sf.net/ldm
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
36struct 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 59
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 WIN2K_DYNAMIC_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/* Most numbers we deal with are big-endian and won't be aligned. */
102#define BE16(x) ((u16)be16_to_cpu(get_unaligned((__be16*)(x))))
103#define BE32(x) ((u32)be32_to_cpu(get_unaligned((__be32*)(x))))
104#define BE64(x) ((u64)be64_to_cpu(get_unaligned((__be64*)(x))))
105
106/* Borrowed from msdos.c */
107#define SYS_IND(p) (get_unaligned(&(p)->sys_ind))
108
109struct frag { /* VBLK Fragment handling */
110 struct list_head list;
111 u32 group;
112 u8 num; /* Total number of records */
113 u8 rec; /* This is record number n */
114 u8 map; /* Which portions are in use */
115 u8 data[0];
116};
117
118/* In memory LDM database structures. */
119
120#define GUID_SIZE 16
121
122struct privhead { /* Offsets and sizes are in sectors. */
123 u16 ver_major;
124 u16 ver_minor;
125 u64 logical_disk_start;
126 u64 logical_disk_size;
127 u64 config_start;
128 u64 config_size;
129 u8 disk_id[GUID_SIZE];
130};
131
132struct tocblock { /* We have exactly two bitmaps. */
133 u8 bitmap1_name[16];
134 u64 bitmap1_start;
135 u64 bitmap1_size;
136 u8 bitmap2_name[16];
137 u64 bitmap2_start;
138 u64 bitmap2_size;
139};
140
141struct vmdb { /* VMDB: The database header */
142 u16 ver_major;
143 u16 ver_minor;
144 u32 vblk_size;
145 u32 vblk_offset;
146 u32 last_vblk_seq;
147};
148
149struct vblk_comp { /* VBLK Component */
150 u8 state[16];
151 u64 parent_id;
152 u8 type;
153 u8 children;
154 u16 chunksize;
155};
156
157struct vblk_dgrp { /* VBLK Disk Group */
158 u8 disk_id[64];
159};
160
161struct vblk_disk { /* VBLK Disk */
162 u8 disk_id[GUID_SIZE];
163 u8 alt_name[128];
164};
165
166struct vblk_part { /* VBLK Partition */
167 u64 start;
168 u64 size; /* start, size and vol_off in sectors */
169 u64 volume_offset;
170 u64 parent_id;
171 u64 disk_id;
172 u8 partnum;
173};
174
175struct vblk_volu { /* VBLK Volume */
176 u8 volume_type[16];
177 u8 volume_state[16];
178 u8 guid[16];
179 u8 drive_hint[4];
180 u64 size;
181 u8 partition_type;
182};
183
184struct vblk_head { /* VBLK standard header */
185 u32 group;
186 u16 rec;
187 u16 nrec;
188};
189
190struct vblk { /* Generalised VBLK */
191 u8 name[64];
192 u64 obj_id;
193 u32 sequence;
194 u8 flags;
195 u8 type;
196 union {
197 struct vblk_comp comp;
198 struct vblk_dgrp dgrp;
199 struct vblk_disk disk;
200 struct vblk_part part;
201 struct vblk_volu volu;
202 } vblk;
203 struct list_head list;
204};
205
206struct ldmdb { /* Cache of the database */
207 struct privhead ph;
208 struct tocblock toc;
209 struct vmdb vm;
210 struct list_head v_dgrp;
211 struct list_head v_disk;
212 struct list_head v_volu;
213 struct list_head v_comp;
214 struct list_head v_part;
215};
216
217int ldm_partition (struct parsed_partitions *state, struct block_device *bdev);
218
219#endif /* _FS_PT_LDM_H_ */
220
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-04 01:52:12 -0500