1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * HFS/HFS+ common definitions, inline functions, 4 * and shared functionality. 5 */ 6 7 #ifndef _HFS_COMMON_H_ 8 #define _HFS_COMMON_H_ 9 10 #ifdef pr_fmt 11 #undef pr_fmt 12 #endif 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 16 #define hfs_dbg(fmt, ...) \ 17 pr_debug("pid %d:%s:%d %s(): " fmt, \ 18 current->pid, __FILE__, __LINE__, __func__, ##__VA_ARGS__) \ 19 20 /* 21 * Format of structures on disk 22 * Information taken from Apple Technote #1150 (HFS Plus Volume Format) 23 */ 24 25 /* offsets to various blocks */ 26 #define HFS_DD_BLK 0 /* Driver Descriptor block */ 27 #define HFS_PMAP_BLK 1 /* First block of partition map */ 28 #define HFS_MDB_BLK 2 /* Block (w/i partition) of MDB */ 29 30 /* magic numbers for various disk blocks */ 31 #define HFS_DRVR_DESC_MAGIC 0x4552 /* "ER": driver descriptor map */ 32 #define HFS_OLD_PMAP_MAGIC 0x5453 /* "TS": old-type partition map */ 33 #define HFS_NEW_PMAP_MAGIC 0x504D /* "PM": new-type partition map */ 34 #define HFS_SUPER_MAGIC 0x4244 /* "BD": HFS MDB (super block) */ 35 #define HFS_MFS_SUPER_MAGIC 0xD2D7 /* MFS MDB (super block) */ 36 37 #define HFSPLUS_VOLHEAD_SIG 0x482b 38 #define HFSPLUS_VOLHEAD_SIGX 0x4858 39 #define HFSPLUS_SUPER_MAGIC 0x482b 40 41 #define HFSP_WRAP_MAGIC 0x4244 42 #define HFSP_WRAP_ATTRIB_SLOCK 0x8000 43 #define HFSP_WRAP_ATTRIB_SPARED 0x0200 44 45 #define HFSP_WRAPOFF_SIG 0x00 46 #define HFSP_WRAPOFF_ATTRIB 0x0A 47 #define HFSP_WRAPOFF_ABLKSIZE 0x14 48 #define HFSP_WRAPOFF_ABLKSTART 0x1C 49 #define HFSP_WRAPOFF_EMBEDSIG 0x7C 50 #define HFSP_WRAPOFF_EMBEDEXT 0x7E 51 52 #define HFSP_HARDLINK_TYPE 0x686c6e6b /* 'hlnk' */ 53 #define HFSP_HFSPLUS_CREATOR 0x6866732b /* 'hfs+' */ 54 55 #define HFSP_SYMLINK_TYPE 0x736c6e6b /* 'slnk' */ 56 #define HFSP_SYMLINK_CREATOR 0x72686170 /* 'rhap' */ 57 58 #define HFSP_MOUNT_VERSION 0x482b4c78 /* 'H+Lx' */ 59 60 #define HFSP_HIDDENDIR_NAME \ 61 "\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80HFS+ Private Data" 62 63 /* various FIXED size parameters */ 64 #define HFS_SECTOR_SIZE 512 /* size of an HFS sector */ 65 #define HFS_SECTOR_SIZE_BITS 9 /* log_2(HFS_SECTOR_SIZE) */ 66 #define HFS_MAX_VALENCE 32767U 67 68 #define HFSPLUS_SECTOR_SIZE HFS_SECTOR_SIZE 69 #define HFSPLUS_SECTOR_SHIFT HFS_SECTOR_SIZE_BITS 70 #define HFSPLUS_VOLHEAD_SECTOR 2 71 #define HFSPLUS_MIN_VERSION 4 72 #define HFSPLUS_CURRENT_VERSION 5 73 74 #define HFS_NAMELEN 31 /* maximum length of an HFS filename */ 75 #define HFS_MAX_NAMELEN 128 76 77 #define HFSPLUS_MAX_STRLEN 255 78 #define HFSPLUS_ATTR_MAX_STRLEN 127 79 80 /* Meanings of the drAtrb field of the MDB, 81 * Reference: _Inside Macintosh: Files_ p. 2-61 82 */ 83 #define HFS_SB_ATTRIB_HLOCK (1 << 7) 84 #define HFS_SB_ATTRIB_UNMNT (1 << 8) 85 #define HFS_SB_ATTRIB_SPARED (1 << 9) 86 #define HFS_SB_ATTRIB_INCNSTNT (1 << 11) 87 #define HFS_SB_ATTRIB_SLOCK (1 << 15) 88 89 /* values for hfs_cat_rec.cdrType */ 90 #define HFS_CDR_DIR 0x01 /* folder (directory) */ 91 #define HFS_CDR_FIL 0x02 /* file */ 92 #define HFS_CDR_THD 0x03 /* folder (directory) thread */ 93 #define HFS_CDR_FTH 0x04 /* file thread */ 94 95 /* legal values for hfs_ext_key.FkType and hfs_file.fork */ 96 #define HFS_FK_DATA 0x00 97 #define HFS_FK_RSRC 0xFF 98 99 /* bits in hfs_fil_entry.Flags */ 100 #define HFS_FIL_LOCK 0x01 /* locked */ 101 #define HFS_FIL_THD 0x02 /* file thread */ 102 #define HFS_FIL_DOPEN 0x04 /* data fork open */ 103 #define HFS_FIL_ROPEN 0x08 /* resource fork open */ 104 #define HFS_FIL_DIR 0x10 /* directory (always clear) */ 105 #define HFS_FIL_NOCOPY 0x40 /* copy-protected file */ 106 #define HFS_FIL_USED 0x80 /* open */ 107 108 /* bits in hfs_dir_entry.Flags. dirflags is 16 bits. */ 109 #define HFS_DIR_LOCK 0x01 /* locked */ 110 #define HFS_DIR_THD 0x02 /* directory thread */ 111 #define HFS_DIR_INEXPFOLDER 0x04 /* in a shared area */ 112 #define HFS_DIR_MOUNTED 0x08 /* mounted */ 113 #define HFS_DIR_DIR 0x10 /* directory (always set) */ 114 #define HFS_DIR_EXPFOLDER 0x20 /* share point */ 115 116 /* bits hfs_finfo.fdFlags */ 117 #define HFS_FLG_INITED 0x0100 118 #define HFS_FLG_LOCKED 0x1000 119 #define HFS_FLG_INVISIBLE 0x4000 120 121 /* Some special File ID numbers */ 122 #define HFS_POR_CNID 1 /* Parent Of the Root */ 123 #define HFSPLUS_POR_CNID HFS_POR_CNID 124 #define HFS_ROOT_CNID 2 /* ROOT directory */ 125 #define HFSPLUS_ROOT_CNID HFS_ROOT_CNID 126 #define HFS_EXT_CNID 3 /* EXTents B-tree */ 127 #define HFSPLUS_EXT_CNID HFS_EXT_CNID 128 #define HFS_CAT_CNID 4 /* CATalog B-tree */ 129 #define HFSPLUS_CAT_CNID HFS_CAT_CNID 130 #define HFS_BAD_CNID 5 /* BAD blocks file */ 131 #define HFSPLUS_BAD_CNID HFS_BAD_CNID 132 #define HFS_ALLOC_CNID 6 /* ALLOCation file (HFS+) */ 133 #define HFSPLUS_ALLOC_CNID HFS_ALLOC_CNID 134 #define HFS_START_CNID 7 /* STARTup file (HFS+) */ 135 #define HFSPLUS_START_CNID HFS_START_CNID 136 #define HFS_ATTR_CNID 8 /* ATTRibutes file (HFS+) */ 137 #define HFSPLUS_ATTR_CNID HFS_ATTR_CNID 138 #define HFS_EXCH_CNID 15 /* ExchangeFiles temp id */ 139 #define HFSPLUS_EXCH_CNID HFS_EXCH_CNID 140 #define HFS_FIRSTUSER_CNID 16 /* first available user id */ 141 #define HFSPLUS_FIRSTUSER_CNID HFS_FIRSTUSER_CNID 142 143 /*======== HFS/HFS+ structures as they appear on the disk ========*/ 144 145 typedef __be32 hfsplus_cnid; 146 typedef __be16 hfsplus_unichr; 147 148 /* Pascal-style string of up to 31 characters */ 149 struct hfs_name { 150 u8 len; 151 u8 name[HFS_NAMELEN]; 152 } __packed; 153 154 /* A "string" as used in filenames, etc. */ 155 struct hfsplus_unistr { 156 __be16 length; 157 hfsplus_unichr unicode[HFSPLUS_MAX_STRLEN]; 158 } __packed; 159 160 /* 161 * A "string" is used in attributes file 162 * for name of extended attribute 163 */ 164 struct hfsplus_attr_unistr { 165 __be16 length; 166 hfsplus_unichr unicode[HFSPLUS_ATTR_MAX_STRLEN]; 167 } __packed; 168 169 struct hfs_extent { 170 __be16 block; 171 __be16 count; 172 }; 173 typedef struct hfs_extent hfs_extent_rec[3]; 174 175 /* A single contiguous area of a file */ 176 struct hfsplus_extent { 177 __be32 start_block; 178 __be32 block_count; 179 } __packed; 180 typedef struct hfsplus_extent hfsplus_extent_rec[8]; 181 182 /* Information for a "Fork" in a file */ 183 struct hfsplus_fork_raw { 184 __be64 total_size; 185 __be32 clump_size; 186 __be32 total_blocks; 187 hfsplus_extent_rec extents; 188 } __packed; 189 190 struct hfs_mdb { 191 __be16 drSigWord; /* Signature word indicating fs type */ 192 __be32 drCrDate; /* fs creation date/time */ 193 __be32 drLsMod; /* fs modification date/time */ 194 __be16 drAtrb; /* fs attributes */ 195 __be16 drNmFls; /* number of files in root directory */ 196 __be16 drVBMSt; /* location (in 512-byte blocks) 197 of the volume bitmap */ 198 __be16 drAllocPtr; /* location (in allocation blocks) 199 to begin next allocation search */ 200 __be16 drNmAlBlks; /* number of allocation blocks */ 201 __be32 drAlBlkSiz; /* bytes in an allocation block */ 202 __be32 drClpSiz; /* clumpsize, the number of bytes to 203 allocate when extending a file */ 204 __be16 drAlBlSt; /* location (in 512-byte blocks) 205 of the first allocation block */ 206 __be32 drNxtCNID; /* CNID to assign to the next 207 file or directory created */ 208 __be16 drFreeBks; /* number of free allocation blocks */ 209 u8 drVN[28]; /* the volume label */ 210 __be32 drVolBkUp; /* fs backup date/time */ 211 __be16 drVSeqNum; /* backup sequence number */ 212 __be32 drWrCnt; /* fs write count */ 213 __be32 drXTClpSiz; /* clumpsize for the extents B-tree */ 214 __be32 drCTClpSiz; /* clumpsize for the catalog B-tree */ 215 __be16 drNmRtDirs; /* number of directories in 216 the root directory */ 217 __be32 drFilCnt; /* number of files in the fs */ 218 __be32 drDirCnt; /* number of directories in the fs */ 219 u8 drFndrInfo[32]; /* data used by the Finder */ 220 __be16 drEmbedSigWord; /* embedded volume signature */ 221 __be32 drEmbedExtent; /* starting block number (xdrStABN) 222 and number of allocation blocks 223 (xdrNumABlks) occupied by embedded 224 volume */ 225 __be32 drXTFlSize; /* bytes in the extents B-tree */ 226 hfs_extent_rec drXTExtRec; /* extents B-tree's first 3 extents */ 227 __be32 drCTFlSize; /* bytes in the catalog B-tree */ 228 hfs_extent_rec drCTExtRec; /* catalog B-tree's first 3 extents */ 229 } __packed; 230 231 /* HFS+ Volume Header */ 232 struct hfsplus_vh { 233 __be16 signature; 234 __be16 version; 235 __be32 attributes; 236 __be32 last_mount_vers; 237 u32 reserved; 238 239 __be32 create_date; 240 __be32 modify_date; 241 __be32 backup_date; 242 __be32 checked_date; 243 244 __be32 file_count; 245 __be32 folder_count; 246 247 __be32 blocksize; 248 __be32 total_blocks; 249 __be32 free_blocks; 250 251 __be32 next_alloc; 252 __be32 rsrc_clump_sz; 253 __be32 data_clump_sz; 254 hfsplus_cnid next_cnid; 255 256 __be32 write_count; 257 __be64 encodings_bmp; 258 259 u32 finder_info[8]; 260 261 struct hfsplus_fork_raw alloc_file; 262 struct hfsplus_fork_raw ext_file; 263 struct hfsplus_fork_raw cat_file; 264 struct hfsplus_fork_raw attr_file; 265 struct hfsplus_fork_raw start_file; 266 } __packed; 267 268 /* HFS+ volume attributes */ 269 #define HFSPLUS_VOL_UNMNT (1 << 8) 270 #define HFSPLUS_VOL_SPARE_BLK (1 << 9) 271 #define HFSPLUS_VOL_NOCACHE (1 << 10) 272 #define HFSPLUS_VOL_INCNSTNT (1 << 11) 273 #define HFSPLUS_VOL_NODEID_REUSED (1 << 12) 274 #define HFSPLUS_VOL_JOURNALED (1 << 13) 275 #define HFSPLUS_VOL_SOFTLOCK (1 << 15) 276 #define HFSPLUS_VOL_UNUSED_NODE_FIX (1 << 31) 277 278 struct hfs_point { 279 __be16 v; 280 __be16 h; 281 } __packed; 282 283 typedef struct hfs_point hfsp_point; 284 285 struct hfs_rect { 286 __be16 top; 287 __be16 left; 288 __be16 bottom; 289 __be16 right; 290 } __packed; 291 292 typedef struct hfs_rect hfsp_rect; 293 294 struct hfs_finfo { 295 __be32 fdType; 296 __be32 fdCreator; 297 __be16 fdFlags; 298 struct hfs_point fdLocation; 299 __be16 fdFldr; 300 } __packed; 301 302 typedef struct hfs_finfo FInfo; 303 304 struct hfs_fxinfo { 305 __be16 fdIconID; 306 u8 fdUnused[8]; 307 __be16 fdComment; 308 __be32 fdPutAway; 309 } __packed; 310 311 typedef struct hfs_fxinfo FXInfo; 312 313 struct hfs_dinfo { 314 struct hfs_rect frRect; 315 __be16 frFlags; 316 struct hfs_point frLocation; 317 __be16 frView; 318 } __packed; 319 320 typedef struct hfs_dinfo DInfo; 321 322 struct hfs_dxinfo { 323 struct hfs_point frScroll; 324 __be32 frOpenChain; 325 __be16 frUnused; 326 __be16 frComment; 327 __be32 frPutAway; 328 } __packed; 329 330 typedef struct hfs_dxinfo DXInfo; 331 332 union hfs_finder_info { 333 struct { 334 struct hfs_finfo finfo; 335 struct hfs_fxinfo fxinfo; 336 } file; 337 struct { 338 struct hfs_dinfo dinfo; 339 struct hfs_dxinfo dxinfo; 340 } dir; 341 } __packed; 342 343 /* The key used in the catalog b-tree: */ 344 struct hfs_cat_key { 345 u8 key_len; /* number of bytes in the key */ 346 u8 reserved; /* padding */ 347 __be32 ParID; /* CNID of the parent dir */ 348 struct hfs_name CName; /* The filename of the entry */ 349 } __packed; 350 351 /* HFS+ catalog entry key */ 352 struct hfsplus_cat_key { 353 __be16 key_len; 354 hfsplus_cnid parent; 355 struct hfsplus_unistr name; 356 } __packed; 357 358 #define HFSPLUS_CAT_KEYLEN (sizeof(struct hfsplus_cat_key)) 359 360 /* The key used in the extents b-tree: */ 361 struct hfs_ext_key { 362 u8 key_len; /* number of bytes in the key */ 363 u8 FkType; /* HFS_FK_{DATA,RSRC} */ 364 __be32 FNum; /* The File ID of the file */ 365 __be16 FABN; /* allocation blocks number*/ 366 } __packed; 367 368 /* HFS+ extents tree key */ 369 struct hfsplus_ext_key { 370 __be16 key_len; 371 u8 fork_type; 372 u8 pad; 373 hfsplus_cnid cnid; 374 __be32 start_block; 375 } __packed; 376 377 #define HFSPLUS_EXT_KEYLEN sizeof(struct hfsplus_ext_key) 378 379 typedef union hfs_btree_key { 380 u8 key_len; /* number of bytes in the key */ 381 struct hfs_cat_key cat; 382 struct hfs_ext_key ext; 383 } hfs_btree_key; 384 385 #define HFS_MAX_CAT_KEYLEN (sizeof(struct hfs_cat_key) - sizeof(u8)) 386 #define HFS_MAX_EXT_KEYLEN (sizeof(struct hfs_ext_key) - sizeof(u8)) 387 388 typedef union hfs_btree_key btree_key; 389 390 /* The catalog record for a file */ 391 struct hfs_cat_file { 392 s8 type; /* The type of entry */ 393 u8 reserved; 394 u8 Flags; /* Flags such as read-only */ 395 s8 Typ; /* file version number = 0 */ 396 struct hfs_finfo UsrWds; /* data used by the Finder */ 397 __be32 FlNum; /* The CNID */ 398 __be16 StBlk; /* obsolete */ 399 __be32 LgLen; /* The logical EOF of the data fork*/ 400 __be32 PyLen; /* The physical EOF of the data fork */ 401 __be16 RStBlk; /* obsolete */ 402 __be32 RLgLen; /* The logical EOF of the rsrc fork */ 403 __be32 RPyLen; /* The physical EOF of the rsrc fork */ 404 __be32 CrDat; /* The creation date */ 405 __be32 MdDat; /* The modified date */ 406 __be32 BkDat; /* The last backup date */ 407 struct hfs_fxinfo FndrInfo; /* more data for the Finder */ 408 __be16 ClpSize; /* number of bytes to allocate 409 when extending files */ 410 hfs_extent_rec ExtRec; /* first extent record 411 for the data fork */ 412 hfs_extent_rec RExtRec; /* first extent record 413 for the resource fork */ 414 u32 Resrv; /* reserved by Apple */ 415 } __packed; 416 417 /* the catalog record for a directory */ 418 struct hfs_cat_dir { 419 s8 type; /* The type of entry */ 420 u8 reserved; 421 __be16 Flags; /* flags */ 422 __be16 Val; /* Valence: number of files and 423 dirs in the directory */ 424 __be32 DirID; /* The CNID */ 425 __be32 CrDat; /* The creation date */ 426 __be32 MdDat; /* The modification date */ 427 __be32 BkDat; /* The last backup date */ 428 struct hfs_dinfo UsrInfo; /* data used by the Finder */ 429 struct hfs_dxinfo FndrInfo; /* more data used by Finder */ 430 u8 Resrv[16]; /* reserved by Apple */ 431 } __packed; 432 433 /* the catalog record for a thread */ 434 struct hfs_cat_thread { 435 s8 type; /* The type of entry */ 436 u8 reserved[9]; /* reserved by Apple */ 437 __be32 ParID; /* CNID of parent directory */ 438 struct hfs_name CName; /* The name of this entry */ 439 } __packed; 440 441 /* A catalog tree record */ 442 typedef union hfs_cat_rec { 443 s8 type; /* The type of entry */ 444 struct hfs_cat_file file; 445 struct hfs_cat_dir dir; 446 struct hfs_cat_thread thread; 447 } hfs_cat_rec; 448 449 /* POSIX permissions */ 450 struct hfsplus_perm { 451 __be32 owner; 452 __be32 group; 453 u8 rootflags; 454 u8 userflags; 455 __be16 mode; 456 __be32 dev; 457 } __packed; 458 459 #define HFSPLUS_FLG_NODUMP 0x01 460 #define HFSPLUS_FLG_IMMUTABLE 0x02 461 #define HFSPLUS_FLG_APPEND 0x04 462 463 /* HFS/HFS+ BTree node descriptor */ 464 struct hfs_bnode_desc { 465 __be32 next; /* (V) Number of the next node at this level */ 466 __be32 prev; /* (V) Number of the prev node at this level */ 467 u8 type; /* (F) The type of node */ 468 u8 height; /* (F) The level of this node (leaves=1) */ 469 __be16 num_recs; /* (V) The number of records in this node */ 470 u16 reserved; 471 } __packed; 472 473 /* HFS/HFS+ BTree node types */ 474 #define HFS_NODE_INDEX 0x00 /* An internal (index) node */ 475 #define HFS_NODE_HEADER 0x01 /* The tree header node (node 0) */ 476 #define HFS_NODE_MAP 0x02 /* Holds part of the bitmap of used nodes */ 477 #define HFS_NODE_LEAF 0xFF /* A leaf (ndNHeight==1) node */ 478 479 /* HFS/HFS+ BTree header */ 480 struct hfs_btree_header_rec { 481 __be16 depth; /* (V) The number of levels in this B-tree */ 482 __be32 root; /* (V) The node number of the root node */ 483 __be32 leaf_count; /* (V) The number of leaf records */ 484 __be32 leaf_head; /* (V) The number of the first leaf node */ 485 __be32 leaf_tail; /* (V) The number of the last leaf node */ 486 __be16 node_size; /* (F) The number of bytes in a node (=512) */ 487 __be16 max_key_len; /* (F) The length of a key in an index node */ 488 __be32 node_count; /* (V) The total number of nodes */ 489 __be32 free_nodes; /* (V) The number of unused nodes */ 490 u16 reserved1; 491 __be32 clump_size; /* (F) clump size. not usually used. */ 492 u8 btree_type; /* (F) BTree type */ 493 u8 key_type; 494 __be32 attributes; /* (F) attributes */ 495 u32 reserved3[16]; 496 } __packed; 497 498 /* BTree attributes */ 499 #define BTREE_ATTR_BADCLOSE 0x00000001 /* b-tree not closed properly. not 500 used by hfsplus. */ 501 #define HFS_TREE_BIGKEYS 0x00000002 /* key length is u16 instead of u8. 502 used by hfsplus. */ 503 #define HFS_TREE_VARIDXKEYS 0x00000004 /* variable key length instead of 504 max key length. use din catalog 505 b-tree but not in extents 506 b-tree (hfsplus). */ 507 508 /* HFS+ BTree misc info */ 509 #define HFSPLUS_TREE_HEAD 0 510 #define HFSPLUS_NODE_MXSZ 32768 511 #define HFSPLUS_ATTR_TREE_NODE_SIZE 8192 512 #define HFSPLUS_BTREE_HDR_NODE_RECS_COUNT 3 513 #define HFSPLUS_BTREE_HDR_USER_BYTES 128 514 515 /* btree key type */ 516 #define HFSPLUS_KEY_CASEFOLDING 0xCF /* case-insensitive */ 517 #define HFSPLUS_KEY_BINARY 0xBC /* case-sensitive */ 518 519 /* HFS+ folder data (part of an hfsplus_cat_entry) */ 520 struct hfsplus_cat_folder { 521 __be16 type; 522 __be16 flags; 523 __be32 valence; 524 hfsplus_cnid id; 525 __be32 create_date; 526 __be32 content_mod_date; 527 __be32 attribute_mod_date; 528 __be32 access_date; 529 __be32 backup_date; 530 struct hfsplus_perm permissions; 531 struct_group_attr(info, __packed, 532 DInfo user_info; 533 DXInfo finder_info; 534 ); 535 __be32 text_encoding; 536 __be32 subfolders; /* Subfolder count in HFSX. Reserved in HFS+. */ 537 } __packed; 538 539 /* HFS+ file data (part of a cat_entry) */ 540 struct hfsplus_cat_file { 541 __be16 type; 542 __be16 flags; 543 u32 reserved1; 544 hfsplus_cnid id; 545 __be32 create_date; 546 __be32 content_mod_date; 547 __be32 attribute_mod_date; 548 __be32 access_date; 549 __be32 backup_date; 550 struct hfsplus_perm permissions; 551 struct_group_attr(info, __packed, 552 FInfo user_info; 553 FXInfo finder_info; 554 ); 555 __be32 text_encoding; 556 u32 reserved2; 557 558 struct hfsplus_fork_raw data_fork; 559 struct hfsplus_fork_raw rsrc_fork; 560 } __packed; 561 562 /* File and folder flag bits */ 563 #define HFSPLUS_FILE_LOCKED 0x0001 564 #define HFSPLUS_FILE_THREAD_EXISTS 0x0002 565 #define HFSPLUS_XATTR_EXISTS 0x0004 566 #define HFSPLUS_ACL_EXISTS 0x0008 567 #define HFSPLUS_HAS_FOLDER_COUNT 0x0010 /* Folder has subfolder count 568 * (HFSX only) */ 569 570 /* HFS+ catalog thread (part of a cat_entry) */ 571 struct hfsplus_cat_thread { 572 __be16 type; 573 s16 reserved; 574 hfsplus_cnid parentID; 575 struct hfsplus_unistr nodeName; 576 } __packed; 577 578 #define HFSPLUS_MIN_THREAD_SZ 10 579 580 /* A data record in the catalog tree */ 581 typedef union { 582 __be16 type; 583 struct hfsplus_cat_folder folder; 584 struct hfsplus_cat_file file; 585 struct hfsplus_cat_thread thread; 586 } __packed hfsplus_cat_entry; 587 588 /* HFS+ catalog entry type */ 589 #define HFSPLUS_FOLDER 0x0001 590 #define HFSPLUS_FILE 0x0002 591 #define HFSPLUS_FOLDER_THREAD 0x0003 592 #define HFSPLUS_FILE_THREAD 0x0004 593 594 #define HFSPLUS_XATTR_FINDER_INFO_NAME "com.apple.FinderInfo" 595 #define HFSPLUS_XATTR_ACL_NAME "com.apple.system.Security" 596 597 #define HFSPLUS_ATTR_INLINE_DATA 0x10 598 #define HFSPLUS_ATTR_FORK_DATA 0x20 599 #define HFSPLUS_ATTR_EXTENTS 0x30 600 601 /* HFS+ attributes tree key */ 602 struct hfsplus_attr_key { 603 __be16 key_len; 604 __be16 pad; 605 hfsplus_cnid cnid; 606 __be32 start_block; 607 struct hfsplus_attr_unistr key_name; 608 } __packed; 609 610 #define HFSPLUS_ATTR_KEYLEN sizeof(struct hfsplus_attr_key) 611 612 /* HFS+ fork data attribute */ 613 struct hfsplus_attr_fork_data { 614 __be32 record_type; 615 __be32 reserved; 616 struct hfsplus_fork_raw the_fork; 617 } __packed; 618 619 /* HFS+ extension attribute */ 620 struct hfsplus_attr_extents { 621 __be32 record_type; 622 __be32 reserved; 623 struct hfsplus_extent extents; 624 } __packed; 625 626 #define HFSPLUS_MAX_INLINE_DATA_SIZE 3802 627 628 /* HFS+ attribute inline data */ 629 struct hfsplus_attr_inline_data { 630 __be32 record_type; 631 __be32 reserved1; 632 u8 reserved2[6]; 633 __be16 length; 634 u8 raw_bytes[HFSPLUS_MAX_INLINE_DATA_SIZE]; 635 } __packed; 636 637 /* A data record in the attributes tree */ 638 typedef union { 639 __be32 record_type; 640 struct hfsplus_attr_fork_data fork_data; 641 struct hfsplus_attr_extents extents; 642 struct hfsplus_attr_inline_data inline_data; 643 } __packed hfsplus_attr_entry; 644 645 /* HFS+ generic BTree key */ 646 typedef union { 647 __be16 key_len; 648 struct hfsplus_cat_key cat; 649 struct hfsplus_ext_key ext; 650 struct hfsplus_attr_key attr; 651 } __packed hfsplus_btree_key; 652 653 #endif /* _HFS_COMMON_H_ */ 654