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/genhd.h> 18 #include <linux/fs.h> 19 #include <asm/unaligned.h> 20 #include <asm/byteorder.h> 21 22 struct parsed_partitions; 23 24 /* Magic numbers in CPU format. */ 25 #define MAGIC_VMDB 0x564D4442 /* VMDB */ 26 #define MAGIC_VBLK 0x56424C4B /* VBLK */ 27 #define MAGIC_PRIVHEAD 0x5052495648454144ULL /* PRIVHEAD */ 28 #define MAGIC_TOCBLOCK 0x544F43424C4F434BULL /* TOCBLOCK */ 29 30 /* The defined vblk types. */ 31 #define VBLK_VOL5 0x51 /* Volume, version 5 */ 32 #define VBLK_CMP3 0x32 /* Component, version 3 */ 33 #define VBLK_PRT3 0x33 /* Partition, version 3 */ 34 #define VBLK_DSK3 0x34 /* Disk, version 3 */ 35 #define VBLK_DSK4 0x44 /* Disk, version 4 */ 36 #define VBLK_DGR3 0x35 /* Disk Group, version 3 */ 37 #define VBLK_DGR4 0x45 /* Disk Group, version 4 */ 38 39 /* vblk flags indicating extra information will be present */ 40 #define VBLK_FLAG_COMP_STRIPE 0x10 41 #define VBLK_FLAG_PART_INDEX 0x08 42 #define VBLK_FLAG_DGR3_IDS 0x08 43 #define VBLK_FLAG_DGR4_IDS 0x08 44 #define VBLK_FLAG_VOLU_ID1 0x08 45 #define VBLK_FLAG_VOLU_ID2 0x20 46 #define VBLK_FLAG_VOLU_SIZE 0x80 47 #define VBLK_FLAG_VOLU_DRIVE 0x02 48 49 /* size of a vblk's static parts */ 50 #define VBLK_SIZE_HEAD 16 51 #define VBLK_SIZE_CMP3 22 /* Name and version */ 52 #define VBLK_SIZE_DGR3 12 53 #define VBLK_SIZE_DGR4 44 54 #define VBLK_SIZE_DSK3 12 55 #define VBLK_SIZE_DSK4 45 56 #define VBLK_SIZE_PRT3 28 57 #define VBLK_SIZE_VOL5 58 58 59 /* component types */ 60 #define COMP_STRIPE 0x01 /* Stripe-set */ 61 #define COMP_BASIC 0x02 /* Basic disk */ 62 #define COMP_RAID 0x03 /* Raid-set */ 63 64 /* Other constants. */ 65 #define LDM_DB_SIZE 2048 /* Size in sectors (= 1MiB). */ 66 67 #define OFF_PRIV1 6 /* Offset of the first privhead 68 relative to the start of the 69 device in sectors */ 70 71 /* Offsets to structures within the LDM Database in sectors. */ 72 #define OFF_PRIV2 1856 /* Backup private headers. */ 73 #define OFF_PRIV3 2047 74 75 #define OFF_TOCB1 1 /* Tables of contents. */ 76 #define OFF_TOCB2 2 77 #define OFF_TOCB3 2045 78 #define OFF_TOCB4 2046 79 80 #define OFF_VMDB 17 /* List of partitions. */ 81 82 #define LDM_PARTITION 0x42 /* Formerly SFS (Landis). */ 83 84 #define TOC_BITMAP1 "config" /* Names of the two defined */ 85 #define TOC_BITMAP2 "log" /* bitmaps in the TOCBLOCK. */ 86 87 /* Borrowed from msdos.c */ 88 #define SYS_IND(p) (get_unaligned(&(p)->sys_ind)) 89 90 struct frag { /* VBLK Fragment handling */ 91 struct list_head list; 92 u32 group; 93 u8 num; /* Total number of records */ 94 u8 rec; /* This is record number n */ 95 u8 map; /* Which portions are in use */ 96 u8 data[0]; 97 }; 98 99 /* In memory LDM database structures. */ 100 101 struct privhead { /* Offsets and sizes are in sectors. */ 102 u16 ver_major; 103 u16 ver_minor; 104 u64 logical_disk_start; 105 u64 logical_disk_size; 106 u64 config_start; 107 u64 config_size; 108 uuid_t disk_id; 109 }; 110 111 struct tocblock { /* We have exactly two bitmaps. */ 112 u8 bitmap1_name[16]; 113 u64 bitmap1_start; 114 u64 bitmap1_size; 115 u8 bitmap2_name[16]; 116 u64 bitmap2_start; 117 u64 bitmap2_size; 118 }; 119 120 struct vmdb { /* VMDB: The database header */ 121 u16 ver_major; 122 u16 ver_minor; 123 u32 vblk_size; 124 u32 vblk_offset; 125 u32 last_vblk_seq; 126 }; 127 128 struct vblk_comp { /* VBLK Component */ 129 u8 state[16]; 130 u64 parent_id; 131 u8 type; 132 u8 children; 133 u16 chunksize; 134 }; 135 136 struct vblk_dgrp { /* VBLK Disk Group */ 137 u8 disk_id[64]; 138 }; 139 140 struct vblk_disk { /* VBLK Disk */ 141 uuid_t disk_id; 142 u8 alt_name[128]; 143 }; 144 145 struct vblk_part { /* VBLK Partition */ 146 u64 start; 147 u64 size; /* start, size and vol_off in sectors */ 148 u64 volume_offset; 149 u64 parent_id; 150 u64 disk_id; 151 u8 partnum; 152 }; 153 154 struct vblk_volu { /* VBLK Volume */ 155 u8 volume_type[16]; 156 u8 volume_state[16]; 157 u8 guid[16]; 158 u8 drive_hint[4]; 159 u64 size; 160 u8 partition_type; 161 }; 162 163 struct vblk_head { /* VBLK standard header */ 164 u32 group; 165 u16 rec; 166 u16 nrec; 167 }; 168 169 struct vblk { /* Generalised VBLK */ 170 u8 name[64]; 171 u64 obj_id; 172 u32 sequence; 173 u8 flags; 174 u8 type; 175 union { 176 struct vblk_comp comp; 177 struct vblk_dgrp dgrp; 178 struct vblk_disk disk; 179 struct vblk_part part; 180 struct vblk_volu volu; 181 } vblk; 182 struct list_head list; 183 }; 184 185 struct ldmdb { /* Cache of the database */ 186 struct privhead ph; 187 struct tocblock toc; 188 struct vmdb vm; 189 struct list_head v_dgrp; 190 struct list_head v_disk; 191 struct list_head v_volu; 192 struct list_head v_comp; 193 struct list_head v_part; 194 }; 195 196 int ldm_partition(struct parsed_partitions *state); 197 198 #endif /* _FS_PT_LDM_H_ */ 199 200