/* * 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 */
/* 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;
typedefunion 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;
/* 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 */ typedefunion 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 ========*/
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