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diff --git a/fs/hfs/hfs.h b/fs/hfs/hfs.h
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+/*
+ * 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_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