fs/hfsplus/hfsplus_raw.h

   1 /*
   2  *  linux/include/linux/hfsplus_raw.h
   3  *
   4  * Copyright (C) 1999
   5  * Brad Boyer (flar@pants.nu)
   6  * (C) 2003 Ardis Technologies <roman@ardistech.com>
   7  *
   8  * Format of structures on disk
   9  * Information taken from Apple Technote #1150 (HFS Plus Volume Format)
  10  *
  11  */
  12
  13 #ifndef _LINUX_HFSPLUS_RAW_H
  14 #define _LINUX_HFSPLUS_RAW_H
  15
  16 #include <linux/types.h>
  17
  18 /* Some constants */
  19 #define HFSPLUS_SECTOR_SIZE        512
  20 #define HFSPLUS_SECTOR_SHIFT         9
  21 #define HFSPLUS_VOLHEAD_SECTOR       2
  22 #define HFSPLUS_VOLHEAD_SIG     0x482b
  23 #define HFSPLUS_VOLHEAD_SIGX    0x4858
  24 #define HFSPLUS_SUPER_MAGIC     0x482b
  25 #define HFSPLUS_MIN_VERSION          4
  26 #define HFSPLUS_CURRENT_VERSION      5
  27
  28 #define HFSP_WRAP_MAGIC         0x4244
  29 #define HFSP_WRAP_ATTRIB_SLOCK  0x8000
  30 #define HFSP_WRAP_ATTRIB_SPARED 0x0200
  31
  32 #define HFSP_WRAPOFF_SIG          0x00
  33 #define HFSP_WRAPOFF_ATTRIB       0x0A
  34 #define HFSP_WRAPOFF_ABLKSIZE     0x14
  35 #define HFSP_WRAPOFF_ABLKSTART    0x1C
  36 #define HFSP_WRAPOFF_EMBEDSIG     0x7C
  37 #define HFSP_WRAPOFF_EMBEDEXT     0x7E
  38
  39 #define HFSP_HIDDENDIR_NAME \
  40         "\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80HFS+ Private Data"
  41
  42 #define HFSP_HARDLINK_TYPE      0x686c6e6b      /* 'hlnk' */
  43 #define HFSP_HFSPLUS_CREATOR    0x6866732b      /* 'hfs+' */
  44
  45 #define HFSP_SYMLINK_TYPE       0x736c6e6b      /* 'slnk' */
  46 #define HFSP_SYMLINK_CREATOR    0x72686170      /* 'rhap' */
  47
  48 #define HFSP_MOUNT_VERSION      0x482b4c78      /* 'H+Lx' */
  49
  50 /* Structures used on disk */
  51
  52 typedef __be32 hfsplus_cnid;
  53 typedef __be16 hfsplus_unichr;
  54
  55 /* A "string" as used in filenames, etc. */
  56 struct hfsplus_unistr {
  57         __be16 length;
  58         hfsplus_unichr unicode[255];
  59 } __packed;
  60
  61 #define HFSPLUS_MAX_STRLEN 255
  62
  63 /* POSIX permissions */
  64 struct hfsplus_perm {
  65         __be32 owner;
  66         __be32 group;
  67         u8  rootflags;
  68         u8  userflags;
  69         __be16 mode;
  70         __be32 dev;
  71 } __packed;
  72
  73 #define HFSPLUS_FLG_NODUMP      0x01
  74 #define HFSPLUS_FLG_IMMUTABLE   0x02
  75 #define HFSPLUS_FLG_APPEND      0x04
  76
  77 /* A single contiguous area of a file */
  78 struct hfsplus_extent {
  79         __be32 start_block;
  80         __be32 block_count;
  81 } __packed;
  82 typedef struct hfsplus_extent hfsplus_extent_rec[8];
  83
  84 /* Information for a "Fork" in a file */
  85 struct hfsplus_fork_raw {
  86         __be64 total_size;
  87         __be32 clump_size;
  88         __be32 total_blocks;
  89         hfsplus_extent_rec extents;
  90 } __packed;
  91
  92 /* HFS+ Volume Header */
  93 struct hfsplus_vh {
  94         __be16 signature;
  95         __be16 version;
  96         __be32 attributes;
  97         __be32 last_mount_vers;
  98         u32 reserved;
  99
 100         __be32 create_date;
 101         __be32 modify_date;
 102         __be32 backup_date;
 103         __be32 checked_date;
 104
 105         __be32 file_count;
 106         __be32 folder_count;
 107
 108         __be32 blocksize;
 109         __be32 total_blocks;
 110         __be32 free_blocks;
 111
 112         __be32 next_alloc;
 113         __be32 rsrc_clump_sz;
 114         __be32 data_clump_sz;
 115         hfsplus_cnid next_cnid;
 116
 117         __be32 write_count;
 118         __be64 encodings_bmp;
 119
 120         u8 finder_info[32];
 121
 122         struct hfsplus_fork_raw alloc_file;
 123         struct hfsplus_fork_raw ext_file;
 124         struct hfsplus_fork_raw cat_file;
 125         struct hfsplus_fork_raw attr_file;
 126         struct hfsplus_fork_raw start_file;
 127 } __packed;
 128
 129 /* HFS+ volume attributes */
 130 #define HFSPLUS_VOL_UNMNT               (1 << 8)
 131 #define HFSPLUS_VOL_SPARE_BLK           (1 << 9)
 132 #define HFSPLUS_VOL_NOCACHE             (1 << 10)
 133 #define HFSPLUS_VOL_INCNSTNT            (1 << 11)
 134 #define HFSPLUS_VOL_NODEID_REUSED       (1 << 12)
 135 #define HFSPLUS_VOL_JOURNALED           (1 << 13)
 136 #define HFSPLUS_VOL_SOFTLOCK            (1 << 15)
 137
 138 /* HFS+ BTree node descriptor */
 139 struct hfs_bnode_desc {
 140         __be32 next;
 141         __be32 prev;
 142         s8 type;
 143         u8 height;
 144         __be16 num_recs;
 145         u16 reserved;
 146 } __packed;
 147
 148 /* HFS+ BTree node types */
 149 #define HFS_NODE_INDEX  0x00
 150 #define HFS_NODE_HEADER 0x01
 151 #define HFS_NODE_MAP    0x02
 152 #define HFS_NODE_LEAF   0xFF
 153
 154 /* HFS+ BTree header */
 155 struct hfs_btree_header_rec {
 156         __be16 depth;
 157         __be32 root;
 158         __be32 leaf_count;
 159         __be32 leaf_head;
 160         __be32 leaf_tail;
 161         __be16 node_size;
 162         __be16 max_key_len;
 163         __be32 node_count;
 164         __be32 free_nodes;
 165         u16 reserved1;
 166         __be32 clump_size;
 167         u8 btree_type;
 168         u8 key_type;
 169         __be32 attributes;
 170         u32 reserved3[16];
 171 } __packed;
 172
 173 /* BTree attributes */
 174 #define HFS_TREE_BIGKEYS        2
 175 #define HFS_TREE_VARIDXKEYS     4
 176
 177 /* HFS+ BTree misc info */
 178 #define HFSPLUS_TREE_HEAD 0
 179 #define HFSPLUS_NODE_MXSZ 32768
 180
 181 /* Some special File ID numbers (stolen from hfs.h) */
 182 #define HFSPLUS_POR_CNID                1       /* Parent Of the Root */
 183 #define HFSPLUS_ROOT_CNID               2       /* ROOT directory */
 184 #define HFSPLUS_EXT_CNID                3       /* EXTents B-tree */
 185 #define HFSPLUS_CAT_CNID                4       /* CATalog B-tree */
 186 #define HFSPLUS_BAD_CNID                5       /* BAD blocks file */
 187 #define HFSPLUS_ALLOC_CNID              6       /* ALLOCation file */
 188 #define HFSPLUS_START_CNID              7       /* STARTup file */
 189 #define HFSPLUS_ATTR_CNID               8       /* ATTRibutes file */
 190 #define HFSPLUS_EXCH_CNID               15      /* ExchangeFiles temp id */
 191 #define HFSPLUS_FIRSTUSER_CNID          16      /* first available user id */
 192
 193 /* btree key type */
 194 #define HFSPLUS_KEY_CASEFOLDING         0xCF    /* case-insensitive */
 195 #define HFSPLUS_KEY_BINARY              0xBC    /* case-sensitive */
 196
 197 /* HFS+ catalog entry key */
 198 struct hfsplus_cat_key {
 199         __be16 key_len;
 200         hfsplus_cnid parent;
 201         struct hfsplus_unistr name;
 202 } __packed;
 203
 204 #define HFSPLUS_CAT_KEYLEN      (sizeof(struct hfsplus_cat_key))
 205
 206 /* Structs from hfs.h */
 207 struct hfsp_point {
 208         __be16 v;
 209         __be16 h;
 210 } __packed;
 211
 212 struct hfsp_rect {
 213         __be16 top;
 214         __be16 left;
 215         __be16 bottom;
 216         __be16 right;
 217 } __packed;
 218
 219
 220 /* HFS directory info (stolen from hfs.h */
 221 struct DInfo {
 222         struct hfsp_rect frRect;
 223         __be16 frFlags;
 224         struct hfsp_point frLocation;
 225         __be16 frView;
 226 } __packed;
 227
 228 struct DXInfo {
 229         struct hfsp_point frScroll;
 230         __be32 frOpenChain;
 231         __be16 frUnused;
 232         __be16 frComment;
 233         __be32 frPutAway;
 234 } __packed;
 235
 236 /* HFS+ folder data (part of an hfsplus_cat_entry) */
 237 struct hfsplus_cat_folder {
 238         __be16 type;
 239         __be16 flags;
 240         __be32 valence;
 241         hfsplus_cnid id;
 242         __be32 create_date;
 243         __be32 content_mod_date;
 244         __be32 attribute_mod_date;
 245         __be32 access_date;
 246         __be32 backup_date;
 247         struct hfsplus_perm permissions;
 248         struct DInfo user_info;
 249         struct DXInfo finder_info;
 250         __be32 text_encoding;
 251         u32 reserved;
 252 } __packed;
 253
 254 /* HFS file info (stolen from hfs.h) */
 255 struct FInfo {
 256         __be32 fdType;
 257         __be32 fdCreator;
 258         __be16 fdFlags;
 259         struct hfsp_point fdLocation;
 260         __be16 fdFldr;
 261 } __packed;
 262
 263 struct FXInfo {
 264         __be16 fdIconID;
 265         u8 fdUnused[8];
 266         __be16 fdComment;
 267         __be32 fdPutAway;
 268 } __packed;
 269
 270 /* HFS+ file data (part of a cat_entry) */
 271 struct hfsplus_cat_file {
 272         __be16 type;
 273         __be16 flags;
 274         u32 reserved1;
 275         hfsplus_cnid id;
 276         __be32 create_date;
 277         __be32 content_mod_date;
 278         __be32 attribute_mod_date;
 279         __be32 access_date;
 280         __be32 backup_date;
 281         struct hfsplus_perm permissions;
 282         struct FInfo user_info;
 283         struct FXInfo finder_info;
 284         __be32 text_encoding;
 285         u32 reserved2;
 286
 287         struct hfsplus_fork_raw data_fork;
 288         struct hfsplus_fork_raw rsrc_fork;
 289 } __packed;
 290
 291 /* File attribute bits */
 292 #define HFSPLUS_FILE_LOCKED             0x0001
 293 #define HFSPLUS_FILE_THREAD_EXISTS      0x0002
 294
 295 /* HFS+ catalog thread (part of a cat_entry) */
 296 struct hfsplus_cat_thread {
 297         __be16 type;
 298         s16 reserved;
 299         hfsplus_cnid parentID;
 300         struct hfsplus_unistr nodeName;
 301 } __packed;
 302
 303 #define HFSPLUS_MIN_THREAD_SZ 10
 304
 305 /* A data record in the catalog tree */
 306 typedef union {
 307         __be16 type;
 308         struct hfsplus_cat_folder folder;
 309         struct hfsplus_cat_file file;
 310         struct hfsplus_cat_thread thread;
 311 } __packed hfsplus_cat_entry;
 312
 313 /* HFS+ catalog entry type */
 314 #define HFSPLUS_FOLDER         0x0001
 315 #define HFSPLUS_FILE           0x0002
 316 #define HFSPLUS_FOLDER_THREAD  0x0003
 317 #define HFSPLUS_FILE_THREAD    0x0004
 318
 319 /* HFS+ extents tree key */
 320 struct hfsplus_ext_key {
 321         __be16 key_len;
 322         u8 fork_type;
 323         u8 pad;
 324         hfsplus_cnid cnid;
 325         __be32 start_block;
 326 } __packed;
 327
 328 #define HFSPLUS_EXT_KEYLEN      sizeof(struct hfsplus_ext_key)
 329
 330 /* HFS+ generic BTree key */
 331 typedef union {
 332         __be16 key_len;
 333         struct hfsplus_cat_key cat;
 334         struct hfsplus_ext_key ext;
 335 } __packed hfsplus_btree_key;
 336
 337 #endif