fs/hfsplus/hfsplus_raw.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  linux/include/linux/hfsplus_raw.h
   4  *
   5  * Copyright (C) 1999
   6  * Brad Boyer (flar@pants.nu)
   7  * (C) 2003 Ardis Technologies <roman@ardistech.com>
   8  *
   9  * Format of structures on disk
  10  * Information taken from Apple Technote #1150 (HFS Plus Volume Format)
  11  *
  12  */
  13
  14 #ifndef _LINUX_HFSPLUS_RAW_H
  15 #define _LINUX_HFSPLUS_RAW_H
  16
  17 #include <linux/types.h>
  18
  19 /* Some constants */
  20 #define HFSPLUS_SECTOR_SIZE        512
  21 #define HFSPLUS_SECTOR_SHIFT         9
  22 #define HFSPLUS_VOLHEAD_SECTOR       2
  23 #define HFSPLUS_VOLHEAD_SIG     0x482b
  24 #define HFSPLUS_VOLHEAD_SIGX    0x4858
  25 #define HFSPLUS_SUPER_MAGIC     0x482b
  26 #define HFSPLUS_MIN_VERSION          4
  27 #define HFSPLUS_CURRENT_VERSION      5
  28
  29 #define HFSP_WRAP_MAGIC         0x4244
  30 #define HFSP_WRAP_ATTRIB_SLOCK  0x8000
  31 #define HFSP_WRAP_ATTRIB_SPARED 0x0200
  32
  33 #define HFSP_WRAPOFF_SIG          0x00
  34 #define HFSP_WRAPOFF_ATTRIB       0x0A
  35 #define HFSP_WRAPOFF_ABLKSIZE     0x14
  36 #define HFSP_WRAPOFF_ABLKSTART    0x1C
  37 #define HFSP_WRAPOFF_EMBEDSIG     0x7C
  38 #define HFSP_WRAPOFF_EMBEDEXT     0x7E
  39
  40 #define HFSP_HIDDENDIR_NAME \
  41         "\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80HFS+ Private Data"
  42
  43 #define HFSP_HARDLINK_TYPE      0x686c6e6b      /* 'hlnk' */
  44 #define HFSP_HFSPLUS_CREATOR    0x6866732b      /* 'hfs+' */
  45
  46 #define HFSP_SYMLINK_TYPE       0x736c6e6b      /* 'slnk' */
  47 #define HFSP_SYMLINK_CREATOR    0x72686170      /* 'rhap' */
  48
  49 #define HFSP_MOUNT_VERSION      0x482b4c78      /* 'H+Lx' */
  50
  51 /* Structures used on disk */
  52
  53 typedef __be32 hfsplus_cnid;
  54 typedef __be16 hfsplus_unichr;
  55
  56 #define HFSPLUS_MAX_STRLEN 255
  57 #define HFSPLUS_ATTR_MAX_STRLEN 127
  58
  59 /* A "string" as used in filenames, etc. */
  60 struct hfsplus_unistr {
  61         __be16 length;
  62         hfsplus_unichr unicode[HFSPLUS_MAX_STRLEN];
  63 } __packed;
  64
  65 /*
  66  * A "string" is used in attributes file
  67  * for name of extended attribute
  68  */
  69 struct hfsplus_attr_unistr {
  70         __be16 length;
  71         hfsplus_unichr unicode[HFSPLUS_ATTR_MAX_STRLEN];
  72 } __packed;
  73
  74 /* POSIX permissions */
  75 struct hfsplus_perm {
  76         __be32 owner;
  77         __be32 group;
  78         u8  rootflags;
  79         u8  userflags;
  80         __be16 mode;
  81         __be32 dev;
  82 } __packed;
  83
  84 #define HFSPLUS_FLG_NODUMP      0x01
  85 #define HFSPLUS_FLG_IMMUTABLE   0x02
  86 #define HFSPLUS_FLG_APPEND      0x04
  87
  88 /* A single contiguous area of a file */
  89 struct hfsplus_extent {
  90         __be32 start_block;
  91         __be32 block_count;
  92 } __packed;
  93 typedef struct hfsplus_extent hfsplus_extent_rec[8];
  94
  95 /* Information for a "Fork" in a file */
  96 struct hfsplus_fork_raw {
  97         __be64 total_size;
  98         __be32 clump_size;
  99         __be32 total_blocks;
 100         hfsplus_extent_rec extents;
 101 } __packed;
 102
 103 /* HFS+ Volume Header */
 104 struct hfsplus_vh {
 105         __be16 signature;
 106         __be16 version;
 107         __be32 attributes;
 108         __be32 last_mount_vers;
 109         u32 reserved;
 110
 111         __be32 create_date;
 112         __be32 modify_date;
 113         __be32 backup_date;
 114         __be32 checked_date;
 115
 116         __be32 file_count;
 117         __be32 folder_count;
 118
 119         __be32 blocksize;
 120         __be32 total_blocks;
 121         __be32 free_blocks;
 122
 123         __be32 next_alloc;
 124         __be32 rsrc_clump_sz;
 125         __be32 data_clump_sz;
 126         hfsplus_cnid next_cnid;
 127
 128         __be32 write_count;
 129         __be64 encodings_bmp;
 130
 131         u32 finder_info[8];
 132
 133         struct hfsplus_fork_raw alloc_file;
 134         struct hfsplus_fork_raw ext_file;
 135         struct hfsplus_fork_raw cat_file;
 136         struct hfsplus_fork_raw attr_file;
 137         struct hfsplus_fork_raw start_file;
 138 } __packed;
 139
 140 /* HFS+ volume attributes */
 141 #define HFSPLUS_VOL_UNMNT               (1 << 8)
 142 #define HFSPLUS_VOL_SPARE_BLK           (1 << 9)
 143 #define HFSPLUS_VOL_NOCACHE             (1 << 10)
 144 #define HFSPLUS_VOL_INCNSTNT            (1 << 11)
 145 #define HFSPLUS_VOL_NODEID_REUSED       (1 << 12)
 146 #define HFSPLUS_VOL_JOURNALED           (1 << 13)
 147 #define HFSPLUS_VOL_SOFTLOCK            (1 << 15)
 148 #define HFSPLUS_VOL_UNUSED_NODE_FIX     (1 << 31)
 149
 150 /* HFS+ BTree node descriptor */
 151 struct hfs_bnode_desc {
 152         __be32 next;
 153         __be32 prev;
 154         s8 type;
 155         u8 height;
 156         __be16 num_recs;
 157         u16 reserved;
 158 } __packed;
 159
 160 /* HFS+ BTree node types */
 161 #define HFS_NODE_INDEX  0x00    /* An internal (index) node */
 162 #define HFS_NODE_HEADER 0x01    /* The tree header node (node 0) */
 163 #define HFS_NODE_MAP    0x02    /* Holds part of the bitmap of used nodes */
 164 #define HFS_NODE_LEAF   0xFF    /* A leaf (ndNHeight==1) node */
 165
 166 /* HFS+ BTree header */
 167 struct hfs_btree_header_rec {
 168         __be16 depth;
 169         __be32 root;
 170         __be32 leaf_count;
 171         __be32 leaf_head;
 172         __be32 leaf_tail;
 173         __be16 node_size;
 174         __be16 max_key_len;
 175         __be32 node_count;
 176         __be32 free_nodes;
 177         u16 reserved1;
 178         __be32 clump_size;
 179         u8 btree_type;
 180         u8 key_type;
 181         __be32 attributes;
 182         u32 reserved3[16];
 183 } __packed;
 184
 185 /* BTree attributes */
 186 #define HFS_TREE_BIGKEYS        2
 187 #define HFS_TREE_VARIDXKEYS     4
 188
 189 /* HFS+ BTree misc info */
 190 #define HFSPLUS_TREE_HEAD 0
 191 #define HFSPLUS_NODE_MXSZ 32768
 192 #define HFSPLUS_ATTR_TREE_NODE_SIZE             8192
 193 #define HFSPLUS_BTREE_HDR_NODE_RECS_COUNT       3
 194 #define HFSPLUS_BTREE_HDR_USER_BYTES            128
 195
 196 /* Some special File ID numbers (stolen from hfs.h) */
 197 #define HFSPLUS_POR_CNID                1       /* Parent Of the Root */
 198 #define HFSPLUS_ROOT_CNID               2       /* ROOT directory */
 199 #define HFSPLUS_EXT_CNID                3       /* EXTents B-tree */
 200 #define HFSPLUS_CAT_CNID                4       /* CATalog B-tree */
 201 #define HFSPLUS_BAD_CNID                5       /* BAD blocks file */
 202 #define HFSPLUS_ALLOC_CNID              6       /* ALLOCation file */
 203 #define HFSPLUS_START_CNID              7       /* STARTup file */
 204 #define HFSPLUS_ATTR_CNID               8       /* ATTRibutes file */
 205 #define HFSPLUS_EXCH_CNID               15      /* ExchangeFiles temp id */
 206 #define HFSPLUS_FIRSTUSER_CNID          16      /* first available user id */
 207
 208 /* btree key type */
 209 #define HFSPLUS_KEY_CASEFOLDING         0xCF    /* case-insensitive */
 210 #define HFSPLUS_KEY_BINARY              0xBC    /* case-sensitive */
 211
 212 /* HFS+ catalog entry key */
 213 struct hfsplus_cat_key {
 214         __be16 key_len;
 215         hfsplus_cnid parent;
 216         struct hfsplus_unistr name;
 217 } __packed;
 218
 219 #define HFSPLUS_CAT_KEYLEN      (sizeof(struct hfsplus_cat_key))
 220
 221 /* Structs from hfs.h */
 222 struct hfsp_point {
 223         __be16 v;
 224         __be16 h;
 225 } __packed;
 226
 227 struct hfsp_rect {
 228         __be16 top;
 229         __be16 left;
 230         __be16 bottom;
 231         __be16 right;
 232 } __packed;
 233
 234
 235 /* HFS directory info (stolen from hfs.h */
 236 struct DInfo {
 237         struct hfsp_rect frRect;
 238         __be16 frFlags;
 239         struct hfsp_point frLocation;
 240         __be16 frView;
 241 } __packed;
 242
 243 struct DXInfo {
 244         struct hfsp_point frScroll;
 245         __be32 frOpenChain;
 246         __be16 frUnused;
 247         __be16 frComment;
 248         __be32 frPutAway;
 249 } __packed;
 250
 251 /* HFS+ folder data (part of an hfsplus_cat_entry) */
 252 struct hfsplus_cat_folder {
 253         __be16 type;
 254         __be16 flags;
 255         __be32 valence;
 256         hfsplus_cnid id;
 257         __be32 create_date;
 258         __be32 content_mod_date;
 259         __be32 attribute_mod_date;
 260         __be32 access_date;
 261         __be32 backup_date;
 262         struct hfsplus_perm permissions;
 263         struct_group_attr(info, __packed,
 264                 struct DInfo user_info;
 265                 struct DXInfo finder_info;
 266         );
 267         __be32 text_encoding;
 268         __be32 subfolders;      /* Subfolder count in HFSX. Reserved in HFS+. */
 269 } __packed;
 270
 271 /* HFS file info (stolen from hfs.h) */
 272 struct FInfo {
 273         __be32 fdType;
 274         __be32 fdCreator;
 275         __be16 fdFlags;
 276         struct hfsp_point fdLocation;
 277         __be16 fdFldr;
 278 } __packed;
 279
 280 struct FXInfo {
 281         __be16 fdIconID;
 282         u8 fdUnused[8];
 283         __be16 fdComment;
 284         __be32 fdPutAway;
 285 } __packed;
 286
 287 /* HFS+ file data (part of a cat_entry) */
 288 struct hfsplus_cat_file {
 289         __be16 type;
 290         __be16 flags;
 291         u32 reserved1;
 292         hfsplus_cnid id;
 293         __be32 create_date;
 294         __be32 content_mod_date;
 295         __be32 attribute_mod_date;
 296         __be32 access_date;
 297         __be32 backup_date;
 298         struct hfsplus_perm permissions;
 299         struct_group_attr(info, __packed,
 300                 struct FInfo user_info;
 301                 struct FXInfo finder_info;
 302         );
 303         __be32 text_encoding;
 304         u32 reserved2;
 305
 306         struct hfsplus_fork_raw data_fork;
 307         struct hfsplus_fork_raw rsrc_fork;
 308 } __packed;
 309
 310 /* File and folder flag bits */
 311 #define HFSPLUS_FILE_LOCKED             0x0001
 312 #define HFSPLUS_FILE_THREAD_EXISTS      0x0002
 313 #define HFSPLUS_XATTR_EXISTS            0x0004
 314 #define HFSPLUS_ACL_EXISTS              0x0008
 315 #define HFSPLUS_HAS_FOLDER_COUNT        0x0010  /* Folder has subfolder count
 316                                                  * (HFSX only) */
 317
 318 /* HFS+ catalog thread (part of a cat_entry) */
 319 struct hfsplus_cat_thread {
 320         __be16 type;
 321         s16 reserved;
 322         hfsplus_cnid parentID;
 323         struct hfsplus_unistr nodeName;
 324 } __packed;
 325
 326 #define HFSPLUS_MIN_THREAD_SZ 10
 327
 328 /* A data record in the catalog tree */
 329 typedef union {
 330         __be16 type;
 331         struct hfsplus_cat_folder folder;
 332         struct hfsplus_cat_file file;
 333         struct hfsplus_cat_thread thread;
 334 } __packed hfsplus_cat_entry;
 335
 336 /* HFS+ catalog entry type */
 337 #define HFSPLUS_FOLDER         0x0001
 338 #define HFSPLUS_FILE           0x0002
 339 #define HFSPLUS_FOLDER_THREAD  0x0003
 340 #define HFSPLUS_FILE_THREAD    0x0004
 341
 342 /* HFS+ extents tree key */
 343 struct hfsplus_ext_key {
 344         __be16 key_len;
 345         u8 fork_type;
 346         u8 pad;
 347         hfsplus_cnid cnid;
 348         __be32 start_block;
 349 } __packed;
 350
 351 #define HFSPLUS_EXT_KEYLEN      sizeof(struct hfsplus_ext_key)
 352
 353 #define HFSPLUS_XATTR_FINDER_INFO_NAME "com.apple.FinderInfo"
 354 #define HFSPLUS_XATTR_ACL_NAME "com.apple.system.Security"
 355
 356 #define HFSPLUS_ATTR_INLINE_DATA 0x10
 357 #define HFSPLUS_ATTR_FORK_DATA   0x20
 358 #define HFSPLUS_ATTR_EXTENTS     0x30
 359
 360 /* HFS+ attributes tree key */
 361 struct hfsplus_attr_key {
 362         __be16 key_len;
 363         __be16 pad;
 364         hfsplus_cnid cnid;
 365         __be32 start_block;
 366         struct hfsplus_attr_unistr key_name;
 367 } __packed;
 368
 369 #define HFSPLUS_ATTR_KEYLEN     sizeof(struct hfsplus_attr_key)
 370
 371 /* HFS+ fork data attribute */
 372 struct hfsplus_attr_fork_data {
 373         __be32 record_type;
 374         __be32 reserved;
 375         struct hfsplus_fork_raw the_fork;
 376 } __packed;
 377
 378 /* HFS+ extension attribute */
 379 struct hfsplus_attr_extents {
 380         __be32 record_type;
 381         __be32 reserved;
 382         struct hfsplus_extent extents;
 383 } __packed;
 384
 385 #define HFSPLUS_MAX_INLINE_DATA_SIZE 3802
 386
 387 /* HFS+ attribute inline data */
 388 struct hfsplus_attr_inline_data {
 389         __be32 record_type;
 390         __be32 reserved1;
 391         u8 reserved2[6];
 392         __be16 length;
 393         u8 raw_bytes[HFSPLUS_MAX_INLINE_DATA_SIZE];
 394 } __packed;
 395
 396 /* A data record in the attributes tree */
 397 typedef union {
 398         __be32 record_type;
 399         struct hfsplus_attr_fork_data fork_data;
 400         struct hfsplus_attr_extents extents;
 401         struct hfsplus_attr_inline_data inline_data;
 402 } __packed hfsplus_attr_entry;
 403
 404 /* HFS+ generic BTree key */
 405 typedef union {
 406         __be16 key_len;
 407         struct hfsplus_cat_key cat;
 408         struct hfsplus_ext_key ext;
 409         struct hfsplus_attr_key attr;
 410 } __packed hfsplus_btree_key;
 411
 412 #endif