/*  * linux/fs/hfs/hfs.h * * Copyright (C) 1995-1997  Paul H. Hargrove * This file may be distributed under the terms of the GNU General Public License. * * "XXX" in a comment is a note to myself to consider changing something. */#ifndef _HFS_H#define _HFS_H#include <linux/hfs_sysdep.h>#define HFS_NEW(X)	((X) = hfs_malloc(sizeof(*(X))))#define HFS_DELETE(X)	do { hfs_free((X), sizeof(*(X))); (X) = NULL; } \                        while (0) /* 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) *//* magic numbers for various internal structures */#define HFS_FILE_MAGIC		0x4801#define HFS_DIR_MAGIC		0x4802#define HFS_MDB_MAGIC		0x4803#define HFS_EXT_MAGIC		0x4804 /* XXX currently unused */#define HFS_BREC_MAGIC		0x4811 /* XXX currently unused */#define HFS_BTREE_MAGIC		0x4812#define HFS_BNODE_MAGIC		0x4813/* 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_NAMEMAX		(3*31) /* max size of ENCODED filename */#define HFS_BM_MAXBLOCKS	(16)   /* max number of bitmap blocks */#define HFS_BM_BPB (8*HFS_SECTOR_SIZE) /* number of bits per bitmap block */#define HFS_MAX_VALENCE		32767U#define HFS_FORK_MAX		(0x7FFFFFFF)/* Meanings of the drAtrb field of the MDB, * Reference: _Inside Macintosh: Files_ p. 2-61 */#define HFS_SB_ATTRIB_HLOCK 0x0080#define HFS_SB_ATTRIB_CLEAN 0x0100#define HFS_SB_ATTRIB_SPARED 0x0200#define HFS_SB_ATTRIB_SLOCK 0x8000/* 2**16 - 1 */#define HFS_USHRT_MAX	65535/* 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 *//* 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_RSRV1   0x20  /* reserved */#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 */#define HFS_DIR_RSRV1       0x40  /* reserved */#define HFS_DIR_RSRV2       0x80  /* reserved *//* Access types used when requesting access to a B-node */#define HFS_LOCK_NONE	0x0000	/* Illegal */#define HFS_LOCK_READ	0x0001	/* read-only access */#define HFS_LOCK_RESRV	0x0002	/* might potentially modify */#define HFS_LOCK_WRITE	0x0003	/* will modify now (exclusive access) */#define HFS_LOCK_MASK	0x000f/* Flags field of the hfs_path_elem */#define HFS_BPATH_FIRST		0x0100#define HFS_BPATH_OVERFLOW	0x0200#define HFS_BPATH_UNDERFLOW	0x0400#define HFS_BPATH_MASK		0x0f00/* Flags for hfs_bfind() */#define HFS_BFIND_EXACT		0x0010#define HFS_BFIND_LOCK		0x0020/* Modes for hfs_bfind() */#define HFS_BFIND_WRITE   (HFS_LOCK_RESRV|HFS_BFIND_EXACT|HFS_BFIND_LOCK)#define HFS_BFIND_READ_EQ (HFS_LOCK_READ|HFS_BFIND_EXACT)#define HFS_BFIND_READ_LE (HFS_LOCK_READ)#define HFS_BFIND_INSERT  (HFS_LOCK_RESRV|HFS_BPATH_FIRST|HFS_BPATH_OVERFLOW)#define HFS_BFIND_DELETE \	 (HFS_LOCK_RESRV|HFS_BFIND_EXACT|HFS_BPATH_FIRST|HFS_BPATH_UNDERFLOW)/*======== HFS structures as they appear on the disk ========*//* Pascal-style string of up to 31 characters */struct hfs_name {	hfs_byte_t	Len;	hfs_byte_t	Name[31];} __attribute__((packed));typedef struct {	hfs_word_t	v;	hfs_word_t	h;} hfs_point_t;typedef struct {	hfs_word_t	top;	hfs_word_t	left;	hfs_word_t	bottom;	hfs_word_t	right;} hfs_rect_t;typedef struct {	hfs_lword_t	 fdType;	hfs_lword_t	 fdCreator;	hfs_word_t	 fdFlags;	hfs_point_t	 fdLocation;	hfs_word_t	 fdFldr;} __attribute__((packed)) hfs_finfo_t;typedef struct {	hfs_word_t	fdIconID;	hfs_byte_t	fdUnused[8];	hfs_word_t	fdComment;	hfs_lword_t	fdPutAway;} __attribute__((packed)) hfs_fxinfo_t;typedef struct {	hfs_rect_t	frRect;	hfs_word_t	frFlags;	hfs_point_t	frLocation;	hfs_word_t	frView;} __attribute__((packed)) hfs_dinfo_t;typedef struct {	hfs_point_t	frScroll;	hfs_lword_t	frOpenChain;	hfs_word_t	frUnused;	hfs_word_t	frComment;	hfs_lword_t	frPutAway;} __attribute__((packed)) hfs_dxinfo_t;union hfs_finder_info {	struct {		hfs_finfo_t	finfo;		hfs_fxinfo_t	fxinfo;	} file;	struct {		hfs_dinfo_t	dinfo;		hfs_dxinfo_t	dxinfo;	} dir;};/* A btree record key on disk */struct hfs_bkey {	hfs_byte_t	KeyLen;		/* number of bytes in the key */	hfs_byte_t	value[1];	/* (KeyLen) bytes of key */} __attribute__((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 {	hfs_byte_t	KeyLen;	/* number of bytes in the key */	hfs_byte_t	Resrv1;	/* padding */	hfs_lword_t	ParID;	/* CNID of the parent dir */	struct hfs_name	CName;	/* The filename of the entry */} __attribute__((packed));/* The key used in the extents b-tree: */struct hfs_ext_key {	hfs_byte_t	KeyLen;	/* number of bytes in the key */	hfs_byte_t	FkType;	/* HFS_FK_{DATA,RSRC} */	hfs_lword_t	FNum;	/* The File ID of the file */	hfs_word_t	FABN;	/* allocation blocks number*/} __attribute__((packed));/*======== Data structures kept in memory ========*//* * struct hfs_mdb * * The fields from the MDB of an HFS filesystem */struct hfs_mdb {	int			magic;		/* A magic number */	unsigned char		vname[28];	/* The volume name */	hfs_sysmdb		sys_mdb;	/* superblock */	hfs_buffer		buf;		/* The hfs_buffer						   holding the real						   superblock (aka VIB						   or MDB) */	hfs_buffer		alt_buf;	/* The hfs_buffer holding						   the alternate superblock */	hfs_buffer		bitmap[16];	/* The hfs_buffer holding the						   allocation bitmap */	struct hfs_btree *	ext_tree;	/* Information about						   the extents b-tree */	struct hfs_btree *	cat_tree;	/* Information about						   the catalog b-tree */	hfs_u32			file_count;	/* The number of						   regular files in						   the filesystem */	hfs_u32			dir_count;	/* The number of						   directories in the						   filesystem */	hfs_u32			next_id;	/* The next available						   file id number */	hfs_u32			clumpablks;	/* The number of allocation						   blocks to try to add when						   extending a file */	hfs_u32			write_count;	/* The number of MDB						   writes (a sort of						   version number) */	hfs_u32			fs_start;	/* The first 512-byte						   block represented						   in the bitmap */	hfs_u32			create_date;	/* In network byte-order */	hfs_u32			modify_date;	/* In network byte-order */	hfs_u32			backup_date;	/* In network byte-order */	hfs_u16			root_files;	/* The number of						   regular						   (non-directory)						   files in the root						   directory */	hfs_u16			root_dirs;	/* The number of						   directories in the						   root directory */	hfs_u16			fs_ablocks;	/* The number of						   allocation blocks						   in the filesystem */	hfs_u16			free_ablocks;	/* The number of unused						   allocation blocks						   in the filesystem */	hfs_u32			alloc_blksz;	/* The number of						   512-byte blocks per						   "allocation block" */	hfs_u16			attrib;		/* Attribute word */	hfs_wait_queue		rename_wait;	int			rename_lock;	hfs_wait_queue		bitmap_wait;