| 1 |
1275 |
phoenix |
/*
|
| 2 |
|
|
* linux/fs/hfs/hfs.h
|
| 3 |
|
|
*
|
| 4 |
|
|
* Copyright (C) 1995-1997 Paul H. Hargrove
|
| 5 |
|
|
* This file may be distributed under the terms of the GNU General Public License.
|
| 6 |
|
|
*
|
| 7 |
|
|
* "XXX" in a comment is a note to myself to consider changing something.
|
| 8 |
|
|
*/
|
| 9 |
|
|
|
| 10 |
|
|
#ifndef _HFS_H
|
| 11 |
|
|
#define _HFS_H
|
| 12 |
|
|
|
| 13 |
|
|
#include <linux/hfs_sysdep.h>
|
| 14 |
|
|
|
| 15 |
|
|
#define HFS_NEW(X) ((X) = hfs_malloc(sizeof(*(X))))
|
| 16 |
|
|
#define HFS_DELETE(X) do { hfs_free((X), sizeof(*(X))); (X) = NULL; } \
|
| 17 |
|
|
while (0)
|
| 18 |
|
|
|
| 19 |
|
|
/* offsets to various blocks */
|
| 20 |
|
|
#define HFS_DD_BLK 0 /* Driver Descriptor block */
|
| 21 |
|
|
#define HFS_PMAP_BLK 1 /* First block of partition map */
|
| 22 |
|
|
#define HFS_MDB_BLK 2 /* Block (w/i partition) of MDB */
|
| 23 |
|
|
|
| 24 |
|
|
/* magic numbers for various disk blocks */
|
| 25 |
|
|
#define HFS_DRVR_DESC_MAGIC 0x4552 /* "ER": driver descriptor map */
|
| 26 |
|
|
#define HFS_OLD_PMAP_MAGIC 0x5453 /* "TS": old-type partition map */
|
| 27 |
|
|
#define HFS_NEW_PMAP_MAGIC 0x504D /* "PM": new-type partition map */
|
| 28 |
|
|
#define HFS_SUPER_MAGIC 0x4244 /* "BD": HFS MDB (super block) */
|
| 29 |
|
|
#define HFS_MFS_SUPER_MAGIC 0xD2D7 /* MFS MDB (super block) */
|
| 30 |
|
|
|
| 31 |
|
|
/* magic numbers for various internal structures */
|
| 32 |
|
|
#define HFS_FILE_MAGIC 0x4801
|
| 33 |
|
|
#define HFS_DIR_MAGIC 0x4802
|
| 34 |
|
|
#define HFS_MDB_MAGIC 0x4803
|
| 35 |
|
|
#define HFS_EXT_MAGIC 0x4804 /* XXX currently unused */
|
| 36 |
|
|
#define HFS_BREC_MAGIC 0x4811 /* XXX currently unused */
|
| 37 |
|
|
#define HFS_BTREE_MAGIC 0x4812
|
| 38 |
|
|
#define HFS_BNODE_MAGIC 0x4813
|
| 39 |
|
|
|
| 40 |
|
|
/* various FIXED size parameters */
|
| 41 |
|
|
#define HFS_SECTOR_SIZE 512 /* size of an HFS sector */
|
| 42 |
|
|
#define HFS_SECTOR_SIZE_BITS 9 /* log_2(HFS_SECTOR_SIZE) */
|
| 43 |
|
|
#define HFS_NAMELEN 31 /* maximum length of an HFS filename */
|
| 44 |
|
|
#define HFS_NAMEMAX (3*31) /* max size of ENCODED filename */
|
| 45 |
|
|
#define HFS_BM_MAXBLOCKS (16) /* max number of bitmap blocks */
|
| 46 |
|
|
#define HFS_BM_BPB (8*HFS_SECTOR_SIZE) /* number of bits per bitmap block */
|
| 47 |
|
|
#define HFS_MAX_VALENCE 32767U
|
| 48 |
|
|
#define HFS_FORK_MAX (0x7FFFFFFF)
|
| 49 |
|
|
|
| 50 |
|
|
/* Meanings of the drAtrb field of the MDB,
|
| 51 |
|
|
* Reference: _Inside Macintosh: Files_ p. 2-61
|
| 52 |
|
|
*/
|
| 53 |
|
|
#define HFS_SB_ATTRIB_HLOCK 0x0080
|
| 54 |
|
|
#define HFS_SB_ATTRIB_CLEAN 0x0100
|
| 55 |
|
|
#define HFS_SB_ATTRIB_SPARED 0x0200
|
| 56 |
|
|
#define HFS_SB_ATTRIB_SLOCK 0x8000
|
| 57 |
|
|
|
| 58 |
|
|
/* 2**16 - 1 */
|
| 59 |
|
|
#define HFS_USHRT_MAX 65535
|
| 60 |
|
|
|
| 61 |
|
|
/* Some special File ID numbers */
|
| 62 |
|
|
#define HFS_POR_CNID 1 /* Parent Of the Root */
|
| 63 |
|
|
#define HFS_ROOT_CNID 2 /* ROOT directory */
|
| 64 |
|
|
#define HFS_EXT_CNID 3 /* EXTents B-tree */
|
| 65 |
|
|
#define HFS_CAT_CNID 4 /* CATalog B-tree */
|
| 66 |
|
|
#define HFS_BAD_CNID 5 /* BAD blocks file */
|
| 67 |
|
|
#define HFS_ALLOC_CNID 6 /* ALLOCation file (HFS+) */
|
| 68 |
|
|
#define HFS_START_CNID 7 /* STARTup file (HFS+) */
|
| 69 |
|
|
#define HFS_ATTR_CNID 8 /* ATTRibutes file (HFS+) */
|
| 70 |
|
|
#define HFS_EXCH_CNID 15 /* ExchangeFiles temp id */
|
| 71 |
|
|
|
| 72 |
|
|
/* values for hfs_cat_rec.cdrType */
|
| 73 |
|
|
#define HFS_CDR_DIR 0x01 /* folder (directory) */
|
| 74 |
|
|
#define HFS_CDR_FIL 0x02 /* file */
|
| 75 |
|
|
#define HFS_CDR_THD 0x03 /* folder (directory) thread */
|
| 76 |
|
|
#define HFS_CDR_FTH 0x04 /* file thread */
|
| 77 |
|
|
|
| 78 |
|
|
/* legal values for hfs_ext_key.FkType and hfs_file.fork */
|
| 79 |
|
|
#define HFS_FK_DATA 0x00
|
| 80 |
|
|
#define HFS_FK_RSRC 0xFF
|
| 81 |
|
|
|
| 82 |
|
|
/* bits in hfs_fil_entry.Flags */
|
| 83 |
|
|
#define HFS_FIL_LOCK 0x01 /* locked */
|
| 84 |
|
|
#define HFS_FIL_THD 0x02 /* file thread */
|
| 85 |
|
|
#define HFS_FIL_DOPEN 0x04 /* data fork open */
|
| 86 |
|
|
#define HFS_FIL_ROPEN 0x08 /* resource fork open */
|
| 87 |
|
|
#define HFS_FIL_DIR 0x10 /* directory (always clear) */
|
| 88 |
|
|
#define HFS_FIL_RSRV1 0x20 /* reserved */
|
| 89 |
|
|
#define HFS_FIL_NOCOPY 0x40 /* copy-protected file */
|
| 90 |
|
|
#define HFS_FIL_USED 0x80 /* open */
|
| 91 |
|
|
|
| 92 |
|
|
/* bits in hfs_dir_entry.Flags. dirflags is 16 bits. */
|
| 93 |
|
|
#define HFS_DIR_LOCK 0x01 /* locked */
|
| 94 |
|
|
#define HFS_DIR_THD 0x02 /* directory thread */
|
| 95 |
|
|
#define HFS_DIR_INEXPFOLDER 0x04 /* in a shared area */
|
| 96 |
|
|
#define HFS_DIR_MOUNTED 0x08 /* mounted */
|
| 97 |
|
|
#define HFS_DIR_DIR 0x10 /* directory (always set) */
|
| 98 |
|
|
#define HFS_DIR_EXPFOLDER 0x20 /* share point */
|
| 99 |
|
|
#define HFS_DIR_RSRV1 0x40 /* reserved */
|
| 100 |
|
|
#define HFS_DIR_RSRV2 0x80 /* reserved */
|
| 101 |
|
|
|
| 102 |
|
|
/* Access types used when requesting access to a B-node */
|
| 103 |
|
|
#define HFS_LOCK_NONE 0x0000 /* Illegal */
|
| 104 |
|
|
#define HFS_LOCK_READ 0x0001 /* read-only access */
|
| 105 |
|
|
#define HFS_LOCK_RESRV 0x0002 /* might potentially modify */
|
| 106 |
|
|
#define HFS_LOCK_WRITE 0x0003 /* will modify now (exclusive access) */
|
| 107 |
|
|
#define HFS_LOCK_MASK 0x000f
|
| 108 |
|
|
|
| 109 |
|
|
/* Flags field of the hfs_path_elem */
|
| 110 |
|
|
#define HFS_BPATH_FIRST 0x0100
|
| 111 |
|
|
#define HFS_BPATH_OVERFLOW 0x0200
|
| 112 |
|
|
#define HFS_BPATH_UNDERFLOW 0x0400
|
| 113 |
|
|
#define HFS_BPATH_MASK 0x0f00
|
| 114 |
|
|
|
| 115 |
|
|
/* Flags for hfs_bfind() */
|
| 116 |
|
|
#define HFS_BFIND_EXACT 0x0010
|
| 117 |
|
|
#define HFS_BFIND_LOCK 0x0020
|
| 118 |
|
|
|
| 119 |
|
|
/* Modes for hfs_bfind() */
|
| 120 |
|
|
#define HFS_BFIND_WRITE (HFS_LOCK_RESRV|HFS_BFIND_EXACT|HFS_BFIND_LOCK)
|
| 121 |
|
|
#define HFS_BFIND_READ_EQ (HFS_LOCK_READ|HFS_BFIND_EXACT)
|
| 122 |
|
|
#define HFS_BFIND_READ_LE (HFS_LOCK_READ)
|
| 123 |
|
|
#define HFS_BFIND_INSERT (HFS_LOCK_RESRV|HFS_BPATH_FIRST|HFS_BPATH_OVERFLOW)
|
| 124 |
|
|
#define HFS_BFIND_DELETE \
|
| 125 |
|
|
(HFS_LOCK_RESRV|HFS_BFIND_EXACT|HFS_BPATH_FIRST|HFS_BPATH_UNDERFLOW)
|
| 126 |
|
|
|
| 127 |
|
|
/*======== HFS structures as they appear on the disk ========*/
|
| 128 |
|
|
|
| 129 |
|
|
/* Pascal-style string of up to 31 characters */
|
| 130 |
|
|
struct hfs_name {
|
| 131 |
|
|
hfs_byte_t Len;
|
| 132 |
|
|
hfs_byte_t Name[31];
|
| 133 |
|
|
} __attribute__((packed));
|
| 134 |
|
|
|
| 135 |
|
|
typedef struct {
|
| 136 |
|
|
hfs_word_t v;
|
| 137 |
|
|
hfs_word_t h;
|
| 138 |
|
|
} hfs_point_t;
|
| 139 |
|
|
|
| 140 |
|
|
typedef struct {
|
| 141 |
|
|
hfs_word_t top;
|
| 142 |
|
|
hfs_word_t left;
|
| 143 |
|
|
hfs_word_t bottom;
|
| 144 |
|
|
hfs_word_t right;
|
| 145 |
|
|
} hfs_rect_t;
|
| 146 |
|
|
|
| 147 |
|
|
typedef struct {
|
| 148 |
|
|
hfs_lword_t fdType;
|
| 149 |
|
|
hfs_lword_t fdCreator;
|
| 150 |
|
|
hfs_word_t fdFlags;
|
| 151 |
|
|
hfs_point_t fdLocation;
|
| 152 |
|
|
hfs_word_t fdFldr;
|
| 153 |
|
|
} __attribute__((packed)) hfs_finfo_t;
|
| 154 |
|
|
|
| 155 |
|
|
typedef struct {
|
| 156 |
|
|
hfs_word_t fdIconID;
|
| 157 |
|
|
hfs_byte_t fdUnused[8];
|
| 158 |
|
|
hfs_word_t fdComment;
|
| 159 |
|
|
hfs_lword_t fdPutAway;
|
| 160 |
|
|
} __attribute__((packed)) hfs_fxinfo_t;
|
| 161 |
|
|
|
| 162 |
|
|
typedef struct {
|
| 163 |
|
|
hfs_rect_t frRect;
|
| 164 |
|
|
hfs_word_t frFlags;
|
| 165 |
|
|
hfs_point_t frLocation;
|
| 166 |
|
|
hfs_word_t frView;
|
| 167 |
|
|
} __attribute__((packed)) hfs_dinfo_t;
|
| 168 |
|
|
|
| 169 |
|
|
typedef struct {
|
| 170 |
|
|
hfs_point_t frScroll;
|
| 171 |
|
|
hfs_lword_t frOpenChain;
|
| 172 |
|
|
hfs_word_t frUnused;
|
| 173 |
|
|
hfs_word_t frComment;
|
| 174 |
|
|
hfs_lword_t frPutAway;
|
| 175 |
|
|
} __attribute__((packed)) hfs_dxinfo_t;
|
| 176 |
|
|
|
| 177 |
|
|
union hfs_finder_info {
|
| 178 |
|
|
struct {
|
| 179 |
|
|
hfs_finfo_t finfo;
|
| 180 |
|
|
hfs_fxinfo_t fxinfo;
|
| 181 |
|
|
} file;
|
| 182 |
|
|
struct {
|
| 183 |
|
|
hfs_dinfo_t dinfo;
|
| 184 |
|
|
hfs_dxinfo_t dxinfo;
|
| 185 |
|
|
} dir;
|
| 186 |
|
|
};
|
| 187 |
|
|
|
| 188 |
|
|
/* A btree record key on disk */
|
| 189 |
|
|
struct hfs_bkey {
|
| 190 |
|
|
hfs_byte_t KeyLen; /* number of bytes in the key */
|
| 191 |
|
|
hfs_byte_t value[1]; /* (KeyLen) bytes of key */
|
| 192 |
|
|
} __attribute__((packed));
|
| 193 |
|
|
|
| 194 |
|
|
/* Cast to a pointer to a generic bkey */
|
| 195 |
|
|
#define HFS_BKEY(X) (((void)((X)->KeyLen)), ((struct hfs_bkey *)(X)))
|
| 196 |
|
|
|
| 197 |
|
|
/* The key used in the catalog b-tree: */
|
| 198 |
|
|
struct hfs_cat_key {
|
| 199 |
|
|
hfs_byte_t KeyLen; /* number of bytes in the key */
|
| 200 |
|
|
hfs_byte_t Resrv1; /* padding */
|
| 201 |
|
|
hfs_lword_t ParID; /* CNID of the parent dir */
|
| 202 |
|
|
struct hfs_name CName; /* The filename of the entry */
|
| 203 |
|
|
} __attribute__((packed));
|
| 204 |
|
|
|
| 205 |
|
|
/* The key used in the extents b-tree: */
|
| 206 |
|
|
struct hfs_ext_key {
|
| 207 |
|
|
hfs_byte_t KeyLen; /* number of bytes in the key */
|
| 208 |
|
|
hfs_byte_t FkType; /* HFS_FK_{DATA,RSRC} */
|
| 209 |
|
|
hfs_lword_t FNum; /* The File ID of the file */
|
| 210 |
|
|
hfs_word_t FABN; /* allocation blocks number*/
|
| 211 |
|
|
} __attribute__((packed));
|
| 212 |
|
|
|
| 213 |
|
|
/*======== Data structures kept in memory ========*/
|
| 214 |
|
|
|
| 215 |
|
|
/*
|
| 216 |
|
|
* struct hfs_mdb
|
| 217 |
|
|
*
|
| 218 |
|
|
* The fields from the MDB of an HFS filesystem
|
| 219 |
|
|
*/
|
| 220 |
|
|
struct hfs_mdb {
|
| 221 |
|
|
int magic; /* A magic number */
|
| 222 |
|
|
unsigned char vname[28]; /* The volume name */
|
| 223 |
|
|
hfs_sysmdb sys_mdb; /* superblock */
|
| 224 |
|
|
hfs_buffer buf; /* The hfs_buffer
|
| 225 |
|
|
holding the real
|
| 226 |
|
|
superblock (aka VIB
|
| 227 |
|
|
or MDB) */
|
| 228 |
|
|
hfs_buffer alt_buf; /* The hfs_buffer holding
|
| 229 |
|
|
the alternate superblock */
|
| 230 |
|
|
hfs_buffer bitmap[16]; /* The hfs_buffer holding the
|
| 231 |
|
|
allocation bitmap */
|
| 232 |
|
|
struct hfs_btree * ext_tree; /* Information about
|
| 233 |
|
|
the extents b-tree */
|
| 234 |
|
|
struct hfs_btree * cat_tree; /* Information about
|
| 235 |
|
|
the catalog b-tree */
|
| 236 |
|
|
hfs_u32 file_count; /* The number of
|
| 237 |
|
|
regular files in
|
| 238 |
|
|
the filesystem */
|
| 239 |
|
|
hfs_u32 dir_count; /* The number of
|
| 240 |
|
|
directories in the
|
| 241 |
|
|
filesystem */
|
| 242 |
|
|
hfs_u32 next_id; /* The next available
|
| 243 |
|
|
file id number */
|
| 244 |
|
|
hfs_u32 clumpablks; /* The number of allocation
|
| 245 |
|
|
blocks to try to add when
|
| 246 |
|
|
extending a file */
|
| 247 |
|
|
hfs_u32 write_count; /* The number of MDB
|
| 248 |
|
|
writes (a sort of
|
| 249 |
|
|
version number) */
|
| 250 |
|
|
hfs_u32 fs_start; /* The first 512-byte
|
| 251 |
|
|
block represented
|
| 252 |
|
|
in the bitmap */
|
| 253 |
|
|
hfs_u32 create_date; /* In network byte-order */
|
| 254 |
|
|
hfs_u32 modify_date; /* In network byte-order */
|
| 255 |
|
|
hfs_u32 backup_date; /* In network byte-order */
|
| 256 |
|
|
hfs_u16 root_files; /* The number of
|
| 257 |
|
|
regular
|
| 258 |
|
|
(non-directory)
|
| 259 |
|
|
files in the root
|
| 260 |
|
|
directory */
|
| 261 |
|
|
hfs_u16 root_dirs; /* The number of
|
| 262 |
|
|
directories in the
|
| 263 |
|
|
root directory */
|
| 264 |
|
|
hfs_u16 fs_ablocks; /* The number of
|
| 265 |
|
|
allocation blocks
|
| 266 |
|
|
in the filesystem */
|
| 267 |
|
|
hfs_u16 free_ablocks; /* The number of unused
|
| 268 |
|
|
allocation blocks
|
| 269 |
|
|
in the filesystem */
|
| 270 |
|
|
hfs_u32 alloc_blksz; /* The number of
|
| 271 |
|
|
512-byte blocks per
|
| 272 |
|
|
"allocation block" */
|
| 273 |
|
|
hfs_u16 attrib; /* Attribute word */
|
| 274 |
|
|
hfs_wait_queue rename_wait;
|
| 275 |
|
|
int rename_lock;
|
| 276 |
|
|
hfs_wait_queue bitmap_wait;
|
| 277 |
|
|
int bitmap_lock;
|
| 278 |
|
|
struct list_head entry_dirty;
|
| 279 |
|
|
};
|
| 280 |
|
|
|
| 281 |
|
|
/*
|
| 282 |
|
|
* struct hfs_extent
|
| 283 |
|
|
*
|
| 284 |
|
|
* The offset to allocation block mapping for a given file is
|
| 285 |
|
|
* contained in a series of these structures. Each (struct
|
| 286 |
|
|
* hfs_extent) records up to three runs of contiguous allocation
|
| 287 |
|
|
* blocks. An allocation block is a contiguous group of physical
|
| 288 |
|
|
* blocks.
|
| 289 |
|
|
*/
|
| 290 |
|
|
struct hfs_extent {
|
| 291 |
|
|
int magic; /* A magic number */
|
| 292 |
|
|
unsigned short start; /* Where in the file this record
|
| 293 |
|
|
begins (in allocation blocks) */
|
| 294 |
|
|
unsigned short end; /* Where in the file this record
|
| 295 |
|
|
ends (in allocation blocks) */
|
| 296 |
|
|
unsigned short block[3]; /* The allocation block on disk which
|
| 297 |
|
|
begins this extent */
|
| 298 |
|
|
unsigned short length[3]; /* The number of allocation blocks
|
| 299 |
|
|
in this extent */
|
| 300 |
|
|
struct hfs_extent *next; /* Next extent record for this file */
|
| 301 |
|
|
struct hfs_extent *prev; /* Previous extent record for this file */
|
| 302 |
|
|
int count; /* Number of times it is used */
|
| 303 |
|
|
};
|
| 304 |
|
|
|
| 305 |
|
|
/*
|
| 306 |
|
|
* struct hfs_dir
|
| 307 |
|
|
*
|
| 308 |
|
|
* This structure holds information specific
|
| 309 |
|
|
* to a directory in an HFS filesystem.
|
| 310 |
|
|
*/
|
| 311 |
|
|
struct hfs_dir {
|
| 312 |
|
|
int magic; /* A magic number */
|
| 313 |
|
|
hfs_u16 flags;
|
| 314 |
|
|
hfs_u16 dirs; /* Number of directories in this one */
|
| 315 |
|
|
hfs_u16 files; /* Number of files in this directory */
|
| 316 |
|
|
int readers;
|
| 317 |
|
|
hfs_wait_queue read_wait;
|
| 318 |
|
|
int writers;
|
| 319 |
|
|
hfs_wait_queue write_wait;
|
| 320 |
|
|
};
|
| 321 |
|
|
|
| 322 |
|
|
/*
|
| 323 |
|
|
* struct hfs_fork
|
| 324 |
|
|
*
|
| 325 |
|
|
* This structure holds the information
|
| 326 |
|
|
* specific to a single fork of a file.
|
| 327 |
|
|
*/
|
| 328 |
|
|
struct hfs_fork {
|
| 329 |
|
|
struct hfs_cat_entry *entry; /* The file this fork is part of */
|
| 330 |
|
|
struct hfs_extent first; /* The first extent record for
|
| 331 |
|
|
this fork */
|
| 332 |
|
|
struct hfs_extent *cache; /* The most-recently accessed
|
| 333 |
|
|
extent record for this fork */
|
| 334 |
|
|
hfs_u32 lsize; /* The logical size in bytes */
|
| 335 |
|
|
hfs_u32 psize; /* The phys size (512-byte blocks) */
|
| 336 |
|
|
hfs_u8 fork; /* Which fork is this? */
|
| 337 |
|
|
};
|
| 338 |
|
|
|
| 339 |
|
|
/*
|
| 340 |
|
|
* struct hfs_file
|
| 341 |
|
|
*
|
| 342 |
|
|
* This structure holds information specific
|
| 343 |
|
|
* to a file in an HFS filesystem.
|
| 344 |
|
|
*/
|
| 345 |
|
|
struct hfs_file {
|
| 346 |
|
|
int magic;
|
| 347 |
|
|
struct hfs_fork data_fork;
|
| 348 |
|
|
struct hfs_fork rsrc_fork;
|
| 349 |
|
|
hfs_u16 clumpablks;
|
| 350 |
|
|
hfs_u8 flags;
|
| 351 |
|
|
};
|
| 352 |
|
|
|
| 353 |
|
|
/*
|
| 354 |
|
|
* struct hfs_file
|
| 355 |
|
|
*
|
| 356 |
|
|
* This structure holds information about a
|
| 357 |
|
|
* file or directory in an HFS filesystem.
|
| 358 |
|
|
*
|
| 359 |
|
|
* 'wait' must remain 1st and 'hash' 2nd since we do some pointer arithmetic.
|
| 360 |
|
|
*/
|
| 361 |
|
|
struct hfs_cat_entry {
|
| 362 |
|
|
hfs_wait_queue wait;
|
| 363 |
|
|
struct list_head hash;
|
| 364 |
|
|
struct list_head list;
|
| 365 |
|
|
struct hfs_mdb *mdb;
|
| 366 |
|
|
hfs_sysentry sys_entry;
|
| 367 |
|
|
struct hfs_cat_key key;
|
| 368 |
|
|
union hfs_finder_info info;
|
| 369 |
|
|
hfs_u32 cnid; /* In network byte-order */
|
| 370 |
|
|
hfs_u32 create_date; /* In network byte-order */
|
| 371 |
|
|
hfs_u32 modify_date; /* In network byte-order */
|
| 372 |
|
|
hfs_u32 backup_date; /* In network byte-order */
|
| 373 |
|
|
unsigned short count;
|
| 374 |
|
|
unsigned long state;
|
| 375 |
|
|
hfs_u8 type;
|
| 376 |
|
|
union {
|
| 377 |
|
|
struct hfs_dir dir;
|
| 378 |
|
|
struct hfs_file file;
|
| 379 |
|
|
} u;
|
| 380 |
|
|
};
|
| 381 |
|
|
|
| 382 |
|
|
/* hfs entry state bits */
|
| 383 |
|
|
#define HFS_DIRTY 1
|
| 384 |
|
|
#define HFS_KEYDIRTY 2
|
| 385 |
|
|
#define HFS_LOCK 4
|
| 386 |
|
|
#define HFS_DELETED 8
|
| 387 |
|
|
|
| 388 |
|
|
/*
|
| 389 |
|
|
* struct hfs_bnode_ref
|
| 390 |
|
|
*
|
| 391 |
|
|
* A pointer to a (struct hfs_bnode) and the type of lock held on it.
|
| 392 |
|
|
*/
|
| 393 |
|
|
struct hfs_bnode_ref {
|
| 394 |
|
|
struct hfs_bnode *bn;
|
| 395 |
|
|
int lock_type;
|
| 396 |
|
|
};
|
| 397 |
|
|
|
| 398 |
|
|
/*
|
| 399 |
|
|
* struct hfs_belem
|
| 400 |
|
|
*
|
| 401 |
|
|
* An element of the path from the root of a B-tree to a leaf.
|
| 402 |
|
|
* Includes the reference to a (struct hfs_bnode), the index of
|
| 403 |
|
|
* the appropriate record in that node, and some flags.
|
| 404 |
|
|
*/
|
| 405 |
|
|
struct hfs_belem {
|
| 406 |
|
|
struct hfs_bnode_ref bnr;
|
| 407 |
|
|
int record;
|
| 408 |
|
|
int flags;
|
| 409 |
|
|
};
|
| 410 |
|
|
|
| 411 |
|
|
/*
|
| 412 |
|
|
* struct hfs_brec
|
| 413 |
|
|
*
|
| 414 |
|
|
* The structure returned by hfs_bfind() to describe the requested record.
|
| 415 |
|
|
*/
|
| 416 |
|
|
struct hfs_brec {
|
| 417 |
|
|
int keep_flags;
|
| 418 |
|
|
struct hfs_btree *tree;
|
| 419 |
|
|
struct hfs_belem *top;
|
| 420 |
|
|
struct hfs_belem *bottom;
|
| 421 |
|
|
struct hfs_belem elem[9];
|
| 422 |
|
|
struct hfs_bkey *key;
|
| 423 |
|
|
void *data; /* The actual data */
|
| 424 |
|
|
};
|
| 425 |
|
|
|
| 426 |
|
|
/*================ Function prototypes ================*/
|
| 427 |
|
|
|
| 428 |
|
|
/* bdelete.c */
|
| 429 |
|
|
extern int hfs_bdelete(struct hfs_btree *, const struct hfs_bkey *);
|
| 430 |
|
|
|
| 431 |
|
|
/* bfind.c */
|
| 432 |
|
|
extern void hfs_brec_relse(struct hfs_brec *, struct hfs_belem *);
|
| 433 |
|
|
extern int hfs_bsucc(struct hfs_brec *, int);
|
| 434 |
|
|
extern int hfs_bfind(struct hfs_brec *, struct hfs_btree *,
|
| 435 |
|
|
const struct hfs_bkey *, int);
|
| 436 |
|
|
|
| 437 |
|
|
/* binsert.c */
|
| 438 |
|
|
extern int hfs_binsert(struct hfs_btree *, const struct hfs_bkey *,
|
| 439 |
|
|
const void *, hfs_u16);
|
| 440 |
|
|
|
| 441 |
|
|
/* bitmap.c */
|
| 442 |
|
|
extern hfs_u16 hfs_vbm_count_free(const struct hfs_mdb *, hfs_u16);
|
| 443 |
|
|
extern hfs_u16 hfs_vbm_search_free(const struct hfs_mdb *, hfs_u16 *);
|
| 444 |
|
|
extern int hfs_set_vbm_bits(struct hfs_mdb *, hfs_u16, hfs_u16);
|
| 445 |
|
|
extern int hfs_clear_vbm_bits(struct hfs_mdb *, hfs_u16, hfs_u16);
|
| 446 |
|
|
|
| 447 |
|
|
/* bitops.c */
|
| 448 |
|
|
extern hfs_u32 hfs_find_zero_bit(const hfs_u32 *, hfs_u32, hfs_u32);
|
| 449 |
|
|
extern hfs_u32 hfs_count_zero_bits(const hfs_u32 *, hfs_u32, hfs_u32);
|
| 450 |
|
|
|
| 451 |
|
|
/* btree.c */
|
| 452 |
|
|
extern struct hfs_btree *hfs_btree_init(struct hfs_mdb *, ino_t,
|
| 453 |
|
|
hfs_byte_t *, hfs_u32, hfs_u32);
|
| 454 |
|
|
extern void hfs_btree_free(struct hfs_btree *);
|
| 455 |
|
|
extern void hfs_btree_commit(struct hfs_btree *, hfs_byte_t *, hfs_lword_t);
|
| 456 |
|
|
|
| 457 |
|
|
/* catalog.c */
|
| 458 |
|
|
extern void hfs_cat_init(void);
|
| 459 |
|
|
extern void hfs_cat_put(struct hfs_cat_entry *);
|
| 460 |
|
|
extern void hfs_cat_mark_dirty(struct hfs_cat_entry *);
|
| 461 |
|
|
extern struct hfs_cat_entry *hfs_cat_get(struct hfs_mdb *,
|
| 462 |
|
|
const struct hfs_cat_key *);
|
| 463 |
|
|
|
| 464 |
|
|
extern void hfs_cat_invalidate(struct hfs_mdb *);
|
| 465 |
|
|
extern void hfs_cat_commit(struct hfs_mdb *);
|
| 466 |
|
|
extern void hfs_cat_free(void);
|
| 467 |
|
|
|
| 468 |
|
|
extern int hfs_cat_compare(const struct hfs_cat_key *,
|
| 469 |
|
|
const struct hfs_cat_key *);
|
| 470 |
|
|
extern void hfs_cat_build_key(hfs_u32, const struct hfs_name *,
|
| 471 |
|
|
struct hfs_cat_key *);
|
| 472 |
|
|
extern struct hfs_cat_entry *hfs_cat_parent(struct hfs_cat_entry *);
|
| 473 |
|
|
|
| 474 |
|
|
extern int hfs_cat_open(struct hfs_cat_entry *, struct hfs_brec *);
|
| 475 |
|
|
extern int hfs_cat_next(struct hfs_cat_entry *, struct hfs_brec *,
|
| 476 |
|
|
hfs_u16, hfs_u32 *, hfs_u8 *);
|
| 477 |
|
|
extern void hfs_cat_close(struct hfs_cat_entry *, struct hfs_brec *);
|
| 478 |
|
|
|
| 479 |
|
|
extern int hfs_cat_create(struct hfs_cat_entry *, struct hfs_cat_key *,
|
| 480 |
|
|
hfs_u8, hfs_u32, hfs_u32, struct hfs_cat_entry **);
|
| 481 |
|
|
extern int hfs_cat_mkdir(struct hfs_cat_entry *, struct hfs_cat_key *,
|
| 482 |
|
|
struct hfs_cat_entry **);
|
| 483 |
|
|
extern int hfs_cat_delete(struct hfs_cat_entry *, struct hfs_cat_entry *, int);
|
| 484 |
|
|
extern int hfs_cat_move(struct hfs_cat_entry *, struct hfs_cat_entry *,
|
| 485 |
|
|
struct hfs_cat_entry *, struct hfs_cat_key *,
|
| 486 |
|
|
struct hfs_cat_entry **);
|
| 487 |
|
|
|
| 488 |
|
|
/* extent.c */
|
| 489 |
|
|
extern int hfs_ext_compare(const struct hfs_ext_key *,
|
| 490 |
|
|
const struct hfs_ext_key *);
|
| 491 |
|
|
extern void hfs_extent_in(struct hfs_fork *, const hfs_byte_t *);
|
| 492 |
|
|
extern void hfs_extent_out(const struct hfs_fork *, hfs_byte_t *);
|
| 493 |
|
|
extern int hfs_extent_map(struct hfs_fork *, int, int);
|
| 494 |
|
|
extern void hfs_extent_adj(struct hfs_fork *);
|
| 495 |
|
|
extern void hfs_extent_free(struct hfs_fork *);
|
| 496 |
|
|
|
| 497 |
|
|
/* file.c */
|
| 498 |
|
|
extern int hfs_get_block(struct inode *, long, struct buffer_head *, int);
|
| 499 |
|
|
|
| 500 |
|
|
/* mdb.c */
|
| 501 |
|
|
extern struct hfs_mdb *hfs_mdb_get(hfs_sysmdb, int, hfs_s32);
|
| 502 |
|
|
extern void hfs_mdb_commit(struct hfs_mdb *, int);
|
| 503 |
|
|
extern void hfs_mdb_put(struct hfs_mdb *, int);
|
| 504 |
|
|
|
| 505 |
|
|
/* part_tbl.c */
|
| 506 |
|
|
extern int hfs_part_find(hfs_sysmdb, int, int, hfs_s32 *, hfs_s32 *);
|
| 507 |
|
|
|
| 508 |
|
|
/* string.c */
|
| 509 |
|
|
extern unsigned int hfs_strhash(const unsigned char *, unsigned int);
|
| 510 |
|
|
extern int hfs_strcmp(const unsigned char *, unsigned int,
|
| 511 |
|
|
const unsigned char *, unsigned int);
|
| 512 |
|
|
extern int hfs_streq(const unsigned char *, unsigned int,
|
| 513 |
|
|
const unsigned char *, unsigned int);
|
| 514 |
|
|
extern void hfs_tolower(unsigned char *, int);
|
| 515 |
|
|
|
| 516 |
|
|
static __inline__ struct dentry
|
| 517 |
|
|
*hfs_lookup_dentry(struct dentry *base, const char *name, const int len)
|
| 518 |
|
|
{
|
| 519 |
|
|
struct qstr this;
|
| 520 |
|
|
|
| 521 |
|
|
this.name = name;
|
| 522 |
|
|
this.len = len;
|
| 523 |
|
|
this.hash = hfs_strhash(name, len);
|
| 524 |
|
|
|
| 525 |
|
|
return d_lookup(base, &this);
|
| 526 |
|
|
}
|
| 527 |
|
|
|
| 528 |
|
|
/* drop a dentry for one of the special directories.
|
| 529 |
|
|
* it's in the form of base/name/dentry. */
|
| 530 |
|
|
static __inline__ void hfs_drop_special(struct dentry *base,
|
| 531 |
|
|
const struct hfs_name *name,
|
| 532 |
|
|
struct dentry *dentry)
|
| 533 |
|
|
{
|
| 534 |
|
|
struct dentry *dparent, *de;
|
| 535 |
|
|
|
| 536 |
|
|
dparent = hfs_lookup_dentry(base, name->Name, name->Len);
|
| 537 |
|
|
if (dparent) {
|
| 538 |
|
|
de = hfs_lookup_dentry(dparent, dentry->d_name.name,
|
| 539 |
|
|
dentry->d_name.len);
|
| 540 |
|
|
if (de) {
|
| 541 |
|
|
if (!de->d_inode)
|
| 542 |
|
|
d_drop(de);
|
| 543 |
|
|
dput(de);
|
| 544 |
|
|
}
|
| 545 |
|
|
dput(dparent);
|
| 546 |
|
|
}
|
| 547 |
|
|
}
|
| 548 |
|
|
|
| 549 |
|
|
extern struct dentry_operations hfs_dentry_operations;
|
| 550 |
|
|
#endif
|
