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/content/view/19/37/ 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 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/* 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