289 lines
9.0 KiB
C
289 lines
9.0 KiB
C
/*
|
|
* linux/fs/hfs/hfs.h
|
|
*
|
|
* Copyright (C) 1995-1997 Paul H. Hargrove
|
|
* (C) 2003 Ardis Technologies <roman@ardistech.com>
|
|
* This file may be distributed under the terms of the GNU General Public License.
|
|
*/
|
|
|
|
#ifndef _HFS_H
|
|
#define _HFS_H
|
|
|
|
/* offsets to various blocks */
|
|
#define HFS_DD_BLK 0 /* Driver Descriptor block */
|
|
#define HFS_PMAP_BLK 1 /* First block of partition map */
|
|
#define HFS_MDB_BLK 2 /* Block (w/i partition) of MDB */
|
|
|
|
/* magic numbers for various disk blocks */
|
|
#define HFS_DRVR_DESC_MAGIC 0x4552 /* "ER": driver descriptor map */
|
|
#define HFS_OLD_PMAP_MAGIC 0x5453 /* "TS": old-type partition map */
|
|
#define HFS_NEW_PMAP_MAGIC 0x504D /* "PM": new-type partition map */
|
|
#define HFS_SUPER_MAGIC 0x4244 /* "BD": HFS MDB (super block) */
|
|
#define HFS_MFS_SUPER_MAGIC 0xD2D7 /* MFS MDB (super block) */
|
|
|
|
/* various FIXED size parameters */
|
|
#define HFS_SECTOR_SIZE 512 /* size of an HFS sector */
|
|
#define HFS_SECTOR_SIZE_BITS 9 /* log_2(HFS_SECTOR_SIZE) */
|
|
#define HFS_NAMELEN 31 /* maximum length of an HFS filename */
|
|
#define HFS_MAX_NAMELEN 128
|
|
#define HFS_MAX_VALENCE 32767U
|
|
|
|
/* Meanings of the drAtrb field of the MDB,
|
|
* Reference: _Inside Macintosh: Files_ p. 2-61
|
|
*/
|
|
#define HFS_SB_ATTRIB_HLOCK (1 << 7)
|
|
#define HFS_SB_ATTRIB_UNMNT (1 << 8)
|
|
#define HFS_SB_ATTRIB_SPARED (1 << 9)
|
|
#define HFS_SB_ATTRIB_INCNSTNT (1 << 11)
|
|
#define HFS_SB_ATTRIB_SLOCK (1 << 15)
|
|
|
|
/* Some special File ID numbers */
|
|
#define HFS_POR_CNID 1 /* Parent Of the Root */
|
|
#define HFS_ROOT_CNID 2 /* ROOT directory */
|
|
#define HFS_EXT_CNID 3 /* EXTents B-tree */
|
|
#define HFS_CAT_CNID 4 /* CATalog B-tree */
|
|
#define HFS_BAD_CNID 5 /* BAD blocks file */
|
|
#define HFS_ALLOC_CNID 6 /* ALLOCation file (HFS+) */
|
|
#define HFS_START_CNID 7 /* STARTup file (HFS+) */
|
|
#define HFS_ATTR_CNID 8 /* ATTRibutes file (HFS+) */
|
|
#define HFS_EXCH_CNID 15 /* ExchangeFiles temp id */
|
|
#define HFS_FIRSTUSER_CNID 16
|
|
|
|
/* values for hfs_cat_rec.cdrType */
|
|
#define HFS_CDR_DIR 0x01 /* folder (directory) */
|
|
#define HFS_CDR_FIL 0x02 /* file */
|
|
#define HFS_CDR_THD 0x03 /* folder (directory) thread */
|
|
#define HFS_CDR_FTH 0x04 /* file thread */
|
|
|
|
/* legal values for hfs_ext_key.FkType and hfs_file.fork */
|
|
#define HFS_FK_DATA 0x00
|
|
#define HFS_FK_RSRC 0xFF
|
|
|
|
/* bits in hfs_fil_entry.Flags */
|
|
#define HFS_FIL_LOCK 0x01 /* locked */
|
|
#define HFS_FIL_THD 0x02 /* file thread */
|
|
#define HFS_FIL_DOPEN 0x04 /* data fork open */
|
|
#define HFS_FIL_ROPEN 0x08 /* resource fork open */
|
|
#define HFS_FIL_DIR 0x10 /* directory (always clear) */
|
|
#define HFS_FIL_NOCOPY 0x40 /* copy-protected file */
|
|
#define HFS_FIL_USED 0x80 /* open */
|
|
|
|
/* bits in hfs_dir_entry.Flags. dirflags is 16 bits. */
|
|
#define HFS_DIR_LOCK 0x01 /* locked */
|
|
#define HFS_DIR_THD 0x02 /* directory thread */
|
|
#define HFS_DIR_INEXPFOLDER 0x04 /* in a shared area */
|
|
#define HFS_DIR_MOUNTED 0x08 /* mounted */
|
|
#define HFS_DIR_DIR 0x10 /* directory (always set) */
|
|
#define HFS_DIR_EXPFOLDER 0x20 /* share point */
|
|
|
|
/* bits hfs_finfo.fdFlags */
|
|
#define HFS_FLG_INITED 0x0100
|
|
#define HFS_FLG_LOCKED 0x1000
|
|
#define HFS_FLG_INVISIBLE 0x4000
|
|
|
|
/*======== HFS structures as they appear on the disk ========*/
|
|
|
|
#define __packed __attribute__ ((packed))
|
|
|
|
/* Pascal-style string of up to 31 characters */
|
|
struct hfs_name {
|
|
u8 len;
|
|
u8 name[HFS_NAMELEN];
|
|
} __packed;
|
|
|
|
struct hfs_point {
|
|
__be16 v;
|
|
__be16 h;
|
|
} __packed;
|
|
|
|
struct hfs_rect {
|
|
__be16 top;
|
|
__be16 left;
|
|
__be16 bottom;
|
|
__be16 right;
|
|
} __packed;
|
|
|
|
struct hfs_finfo {
|
|
__be32 fdType;
|
|
__be32 fdCreator;
|
|
__be16 fdFlags;
|
|
struct hfs_point fdLocation;
|
|
__be16 fdFldr;
|
|
} __packed;
|
|
|
|
struct hfs_fxinfo {
|
|
__be16 fdIconID;
|
|
u8 fdUnused[8];
|
|
__be16 fdComment;
|
|
__be32 fdPutAway;
|
|
} __packed;
|
|
|
|
struct hfs_dinfo {
|
|
struct hfs_rect frRect;
|
|
__be16 frFlags;
|
|
struct hfs_point frLocation;
|
|
__be16 frView;
|
|
} __packed;
|
|
|
|
struct hfs_dxinfo {
|
|
struct hfs_point frScroll;
|
|
__be32 frOpenChain;
|
|
__be16 frUnused;
|
|
__be16 frComment;
|
|
__be32 frPutAway;
|
|
} __packed;
|
|
|
|
union hfs_finder_info {
|
|
struct {
|
|
struct hfs_finfo finfo;
|
|
struct hfs_fxinfo fxinfo;
|
|
} file;
|
|
struct {
|
|
struct hfs_dinfo dinfo;
|
|
struct hfs_dxinfo dxinfo;
|
|
} dir;
|
|
} __packed;
|
|
|
|
/* Cast to a pointer to a generic bkey */
|
|
#define HFS_BKEY(X) (((void)((X)->KeyLen)), ((struct hfs_bkey *)(X)))
|
|
|
|
/* The key used in the catalog b-tree: */
|
|
struct hfs_cat_key {
|
|
u8 key_len; /* number of bytes in the key */
|
|
u8 reserved; /* padding */
|
|
__be32 ParID; /* CNID of the parent dir */
|
|
struct hfs_name CName; /* The filename of the entry */
|
|
} __packed;
|
|
|
|
/* The key used in the extents b-tree: */
|
|
struct hfs_ext_key {
|
|
u8 key_len; /* number of bytes in the key */
|
|
u8 FkType; /* HFS_FK_{DATA,RSRC} */
|
|
__be32 FNum; /* The File ID of the file */
|
|
__be16 FABN; /* allocation blocks number*/
|
|
} __packed;
|
|
|
|
typedef union hfs_btree_key {
|
|
u8 key_len; /* number of bytes in the key */
|
|
struct hfs_cat_key cat;
|
|
struct hfs_ext_key ext;
|
|
} hfs_btree_key;
|
|
|
|
typedef union hfs_btree_key btree_key;
|
|
|
|
struct hfs_extent {
|
|
__be16 block;
|
|
__be16 count;
|
|
};
|
|
typedef struct hfs_extent hfs_extent_rec[3];
|
|
|
|
/* The catalog record for a file */
|
|
struct hfs_cat_file {
|
|
s8 type; /* The type of entry */
|
|
u8 reserved;
|
|
u8 Flags; /* Flags such as read-only */
|
|
s8 Typ; /* file version number = 0 */
|
|
struct hfs_finfo UsrWds; /* data used by the Finder */
|
|
__be32 FlNum; /* The CNID */
|
|
__be16 StBlk; /* obsolete */
|
|
__be32 LgLen; /* The logical EOF of the data fork*/
|
|
__be32 PyLen; /* The physical EOF of the data fork */
|
|
__be16 RStBlk; /* obsolete */
|
|
__be32 RLgLen; /* The logical EOF of the rsrc fork */
|
|
__be32 RPyLen; /* The physical EOF of the rsrc fork */
|
|
__be32 CrDat; /* The creation date */
|
|
__be32 MdDat; /* The modified date */
|
|
__be32 BkDat; /* The last backup date */
|
|
struct hfs_fxinfo FndrInfo; /* more data for the Finder */
|
|
__be16 ClpSize; /* number of bytes to allocate
|
|
when extending files */
|
|
hfs_extent_rec ExtRec; /* first extent record
|
|
for the data fork */
|
|
hfs_extent_rec RExtRec; /* first extent record
|
|
for the resource fork */
|
|
u32 Resrv; /* reserved by Apple */
|
|
} __packed;
|
|
|
|
/* the catalog record for a directory */
|
|
struct hfs_cat_dir {
|
|
s8 type; /* The type of entry */
|
|
u8 reserved;
|
|
__be16 Flags; /* flags */
|
|
__be16 Val; /* Valence: number of files and
|
|
dirs in the directory */
|
|
__be32 DirID; /* The CNID */
|
|
__be32 CrDat; /* The creation date */
|
|
__be32 MdDat; /* The modification date */
|
|
__be32 BkDat; /* The last backup date */
|
|
struct hfs_dinfo UsrInfo; /* data used by the Finder */
|
|
struct hfs_dxinfo FndrInfo; /* more data used by Finder */
|
|
u8 Resrv[16]; /* reserved by Apple */
|
|
} __packed;
|
|
|
|
/* the catalog record for a thread */
|
|
struct hfs_cat_thread {
|
|
s8 type; /* The type of entry */
|
|
u8 reserved[9]; /* reserved by Apple */
|
|
__be32 ParID; /* CNID of parent directory */
|
|
struct hfs_name CName; /* The name of this entry */
|
|
} __packed;
|
|
|
|
/* A catalog tree record */
|
|
typedef union hfs_cat_rec {
|
|
s8 type; /* The type of entry */
|
|
struct hfs_cat_file file;
|
|
struct hfs_cat_dir dir;
|
|
struct hfs_cat_thread thread;
|
|
} hfs_cat_rec;
|
|
|
|
struct hfs_mdb {
|
|
__be16 drSigWord; /* Signature word indicating fs type */
|
|
__be32 drCrDate; /* fs creation date/time */
|
|
__be32 drLsMod; /* fs modification date/time */
|
|
__be16 drAtrb; /* fs attributes */
|
|
__be16 drNmFls; /* number of files in root directory */
|
|
__be16 drVBMSt; /* location (in 512-byte blocks)
|
|
of the volume bitmap */
|
|
__be16 drAllocPtr; /* location (in allocation blocks)
|
|
to begin next allocation search */
|
|
__be16 drNmAlBlks; /* number of allocation blocks */
|
|
__be32 drAlBlkSiz; /* bytes in an allocation block */
|
|
__be32 drClpSiz; /* clumpsize, the number of bytes to
|
|
allocate when extending a file */
|
|
__be16 drAlBlSt; /* location (in 512-byte blocks)
|
|
of the first allocation block */
|
|
__be32 drNxtCNID; /* CNID to assign to the next
|
|
file or directory created */
|
|
__be16 drFreeBks; /* number of free allocation blocks */
|
|
u8 drVN[28]; /* the volume label */
|
|
__be32 drVolBkUp; /* fs backup date/time */
|
|
__be16 drVSeqNum; /* backup sequence number */
|
|
__be32 drWrCnt; /* fs write count */
|
|
__be32 drXTClpSiz; /* clumpsize for the extents B-tree */
|
|
__be32 drCTClpSiz; /* clumpsize for the catalog B-tree */
|
|
__be16 drNmRtDirs; /* number of directories in
|
|
the root directory */
|
|
__be32 drFilCnt; /* number of files in the fs */
|
|
__be32 drDirCnt; /* number of directories in the fs */
|
|
u8 drFndrInfo[32]; /* data used by the Finder */
|
|
__be16 drEmbedSigWord; /* embedded volume signature */
|
|
__be32 drEmbedExtent; /* starting block number (xdrStABN)
|
|
and number of allocation blocks
|
|
(xdrNumABlks) occupied by embedded
|
|
volume */
|
|
__be32 drXTFlSize; /* bytes in the extents B-tree */
|
|
hfs_extent_rec drXTExtRec; /* extents B-tree's first 3 extents */
|
|
__be32 drCTFlSize; /* bytes in the catalog B-tree */
|
|
hfs_extent_rec drCTExtRec; /* catalog B-tree's first 3 extents */
|
|
} __packed;
|
|
|
|
/*======== Data structures kept in memory ========*/
|
|
|
|
struct hfs_readdir_data {
|
|
struct list_head list;
|
|
struct file *file;
|
|
struct hfs_cat_key key;
|
|
};
|
|
|
|
#endif
|