forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
289 lines
9.1 KiB
289 lines
9.1 KiB
/* |
|
* linux/fs/hfs/hfs.h |
|
* |
|
* Copyright (C) 1995-1997 Paul H. Hargrove |
|
* (C) 2003 Ardis Technologies <[email protected]> |
|
* 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 ========*/ |
|
|
|
/* 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; |
|
|
|
#define HFS_MAX_CAT_KEYLEN (sizeof(struct hfs_cat_key) - sizeof(u8)) |
|
#define HFS_MAX_EXT_KEYLEN (sizeof(struct hfs_ext_key) - sizeof(u8)) |
|
|
|
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
|
|
|