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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
145typedef __be32 hfsplus_cnid;
146typedef __be16 hfsplus_unichr;
147
148/* Pascal-style string of up to 31 characters */
149struct hfs_name {
150 u8 len;
151 u8 name[HFS_NAMELEN];
152} __packed;
153
154/* A "string" as used in filenames, etc. */
155struct 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 */
164struct hfsplus_attr_unistr {
165 __be16 length;
166 hfsplus_unichr unicode[HFSPLUS_ATTR_MAX_STRLEN];
167} __packed;
168
169struct hfs_extent {
170 __be16 block;
171 __be16 count;
172};
173typedef struct hfs_extent hfs_extent_rec[3];
174
175/* A single contiguous area of a file */
176struct hfsplus_extent {
177 __be32 start_block;
178 __be32 block_count;
179} __packed;
180typedef struct hfsplus_extent hfsplus_extent_rec[8];
181
182/* Information for a "Fork" in a file */
183struct hfsplus_fork_raw {
184 __be64 total_size;
185 __be32 clump_size;
186 __be32 total_blocks;
187 hfsplus_extent_rec extents;
188} __packed;
189
190struct 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 */
232struct 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
278struct hfs_point {
279 __be16 v;
280 __be16 h;
281} __packed;
282
283typedef struct hfs_point hfsp_point;
284
285struct hfs_rect {
286 __be16 top;
287 __be16 left;
288 __be16 bottom;
289 __be16 right;
290} __packed;
291
292typedef struct hfs_rect hfsp_rect;
293
294struct hfs_finfo {
295 __be32 fdType;
296 __be32 fdCreator;
297 __be16 fdFlags;
298 struct hfs_point fdLocation;
299 __be16 fdFldr;
300} __packed;
301
302typedef struct hfs_finfo FInfo;
303
304struct hfs_fxinfo {
305 __be16 fdIconID;
306 u8 fdUnused[8];
307 __be16 fdComment;
308 __be32 fdPutAway;
309} __packed;
310
311typedef struct hfs_fxinfo FXInfo;
312
313struct hfs_dinfo {
314 struct hfs_rect frRect;
315 __be16 frFlags;
316 struct hfs_point frLocation;
317 __be16 frView;
318} __packed;
319
320typedef struct hfs_dinfo DInfo;
321
322struct hfs_dxinfo {
323 struct hfs_point frScroll;
324 __be32 frOpenChain;
325 __be16 frUnused;
326 __be16 frComment;
327 __be32 frPutAway;
328} __packed;
329
330typedef struct hfs_dxinfo DXInfo;
331
332union 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: */
344struct 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 */
352struct 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: */
361struct 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 */
369struct 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
379typedef 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
388typedef union hfs_btree_key btree_key;
389
390/* The catalog record for a file */
391struct 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 */
418struct 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 */
434struct 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 */
442typedef 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 */
450struct 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 */
464struct 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 */
480struct 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) */
520struct 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) */
540struct 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) */
571struct 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 */
581typedef 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 */
602struct 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 */
613struct 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 */
620struct 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 */
629struct 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 */
638typedef 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 */
646typedef 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

source code of linux/include/linux/hfs_common.h