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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
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 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
104struct 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
117struct 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
127struct 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
136struct 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
144struct vblk_comp { /* VBLK Component */
145 u8 state[16];
146 u64 parent_id;
147 u8 type;
148 u8 children;
149 u16 chunksize;
150};
151
152struct vblk_dgrp { /* VBLK Disk Group */
153 u8 disk_id[64];
154};
155
156struct vblk_disk { /* VBLK Disk */
157 u8 disk_id[GUID_SIZE];
158 u8 alt_name[128];
159};
160
161struct 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
170struct 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
179struct vblk_head { /* VBLK standard header */
180 u32 group;
181 u16 rec;
182 u16 nrec;
183};
184
185struct 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
201struct 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
212int ldm_partition(struct parsed_partitions *state);
213
214#endif /* _FS_PT_LDM_H_ */
215