[apple/xnu.git] / bsd / hfs / hfs.h

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#ifndef __HFS__
#define __HFS__

#define HFS_SPARSE_DEV 1

#include <sys/appleapiopts.h>

#ifdef KERNEL
#ifdef __APPLE_API_PRIVATE
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/quota.h>
#include <sys/dirent.h>
#include <sys/event.h>

#include <kern/locks.h>

#include <vfs/vfs_journal.h>

#include <hfs/hfs_format.h>
#include <hfs/hfs_catalog.h>
#include <hfs/hfs_cnode.h>
#include <hfs/hfs_macos_defs.h>
#include <hfs/hfs_encodings.h>
#include <hfs/hfs_hotfiles.h>

/*
 *	Just reported via MIG interface.
 */
#define VERSION_STRING	"hfs-2 (4-12-99)"

#define HFS_LINK_MAX	32767

#define HFS_MAX_DEFERED_ALLOC	(1024*1024)

// 32 gigs is a "big" file (i.e. one that when deleted
// would touch enough data that we should break it into
// multiple separate transactions
#define HFS_BIGFILE_SIZE (32LL * 1024LL * 1024LL * 1024LL)


enum { kMDBSize = 512 };				/* Size of I/O transfer to read entire MDB */

enum { kMasterDirectoryBlock = 2 };			/* MDB offset on disk in 512-byte blocks */
enum { kMDBOffset = kMasterDirectoryBlock * 512 };	/* MDB offset on disk in bytes */

#define kRootDirID kHFSRootFolderID


/* number of locked buffer caches to hold for b-tree meta data */
#define kMaxLockedMetaBuffers		32		

/*
 *	File type and creator for symbolic links
 */
enum {
	kSymLinkFileType  = 0x736C6E6B,	/* 'slnk' */
	kSymLinkCreator   = 0x72686170	/* 'rhap' */
};


extern struct timezone gTimeZone;


/* How many free extents to cache per volume */
#define kMaxFreeExtents		10

/*
 * HFS_MINFREE gives the minimum acceptable percentage
 * of file system blocks which may be free (but this
 * minimum will never exceed HFS_MAXRESERVE bytes). If
 * the free block count drops below this level only the
 * superuser may continue to allocate blocks.
 */
#define HFS_MINFREE		1
#define HFS_MAXRESERVE		((u_int64_t)(250*1024*1024))

/*
 * The system distinguishes between the desirable low-disk
 * notifiaction levels for root volumes and non-root volumes.
 * The various thresholds are computed as a fraction of the
 * volume size, all capped at a certain fixed level
 */
 
#define HFS_ROOTLOWDISKTRIGGERFRACTION 5
#define HFS_ROOTLOWDISKTRIGGERLEVEL ((u_int64_t)(250*1024*1024))
#define HFS_ROOTLOWDISKSHUTOFFFRACTION 6
#define HFS_ROOTLOWDISKSHUTOFFLEVEL ((u_int64_t)(375*1024*1024))

#define HFS_LOWDISKTRIGGERFRACTION 1
#define HFS_LOWDISKTRIGGERLEVEL ((u_int64_t)(50*1024*1024))
#define HFS_LOWDISKSHUTOFFFRACTION 2
#define HFS_LOWDISKSHUTOFFLEVEL ((u_int64_t)(75*1024*1024))

/* Internal Data structures*/


#define kHFS_DamagedVolume  0x1	/* This volume has errors, unmount dirty */

/* XXX */
#define MARK_VOLUMEDAMAGED(fcb) 


/* This structure describes the HFS specific mount structure data. */
typedef struct hfsmount {
	u_int32_t     hfs_flags;              /* see below */

	/* Physical Description */
	u_long        hfs_phys_block_size;    /* Always a multiple of 512 */
	daddr64_t     hfs_phys_block_count;   /* Num of PHYSICAL blocks of volume */
	daddr64_t     hfs_alt_id_sector;      /* location of alternate VH/MDB */

	/* Access to VFS and devices */
	struct mount		*hfs_mp;				/* filesystem vfs structure */
	struct vnode		*hfs_devvp;				/* block device mounted vnode */
	struct vnode *		hfs_extents_vp;
	struct vnode *		hfs_catalog_vp;
	struct vnode *		hfs_allocation_vp;
	struct vnode *		hfs_attribute_vp;
	dev_t			hfs_raw_dev;			/* device mounted */
	u_int32_t		hfs_logBlockSize;		/* Size of buffer cache buffer for I/O */
	
	/* Default values for HFS standard and non-init access */
	uid_t         hfs_uid;            /* uid to set as owner of the files */
	gid_t         hfs_gid;            /* gid to set as owner of the files */
	mode_t        hfs_dir_mask;       /* mask to and with directory protection bits */
	mode_t        hfs_file_mask;      /* mask to and with file protection bits */
	u_long        hfs_encoding;       /* Defualt encoding for non hfs+ volumes */	

	/* Persistent fields (on disk, dynamic) */
	time_t        hfs_mtime;          /* file system last modification time */
	u_int32_t     hfs_filecount;      /* number of files in file system */
	u_int32_t     hfs_dircount;       /* number of directories in file system */
	u_int32_t     freeBlocks;	  /* free allocation blocks */
	u_int32_t     nextAllocation;	  /* start of next allocation search */
	u_int32_t     vcbNxtCNID;         /* next unused catalog node ID */
	u_int32_t     vcbWrCnt;           /* file system write count */
	u_int64_t     encodingsBitmap;    /* in-use encodings */
	u_int16_t     vcbNmFls;           /* HFS Only - root dir file count */
	u_int16_t     vcbNmRtDirs;        /* HFS Only - root dir directory count */

	/* Persistent fields (on disk, static) */
	u_int16_t 			vcbSigWord;
	int16_t				vcbFlags;
	u_int32_t 			vcbAtrb;
	u_int32_t 			vcbJinfoBlock;
	time_t        hfs_itime;   /* file system creation time */
	time_t        hfs_btime;   /* file system last backup time */
	u_int32_t 			blockSize;	/* size of allocation blocks */
	u_int32_t 			totalBlocks;	/* total allocation blocks */
	int32_t 			vcbClpSiz;
	u_int32_t     vcbFndrInfo[8];
	int16_t 			vcbVBMSt;		/* HFS only */
	int16_t 			vcbAlBlSt;		/* HFS only */

	/* vcb stuff */
	u_int8_t		 	vcbVN[256];		/* volume name in UTF-8 */
	u_int32_t	 		volumeNameEncodingHint;
	u_int32_t 			hfsPlusIOPosOffset;	/* Disk block where HFS+ starts */
	u_int32_t 			vcbVBMIOSize;		/* volume bitmap I/O size */
	
	/* cache of largest known free extents */
	u_int32_t			vcbFreeExtCnt;
	HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
	
	u_int32_t		reserveBlocks;		/* free block reserve */
	u_int32_t		loanedBlocks;		/* blocks on loan for delayed allocations */
	
	u_int32_t 			localCreateDate;	/* creation times for HFS+ volumes are in local time */
	struct cat_desc		hfs_privdir_desc;
	struct cat_attr		hfs_privdir_attr;
	u_int32_t		hfs_metadata_createdate;
	hfs_to_unicode_func_t	hfs_get_unicode;
	unicode_to_hfs_func_t	hfs_get_hfsname;
 
	/* Quota variables: */
	struct quotafile	hfs_qfiles[MAXQUOTAS];    /* quota files */

	/* Journaling variables: */
	void                *jnl;           // the journal for this volume (if one exists)
	struct vnode        *jvp;           // device where the journal lives (may be equal to devvp)
	u_int32_t            jnl_start;     // start block of the journal file (so we don't delete it)
	u_int32_t            jnl_size;
	u_int32_t            hfs_jnlfileid;
	u_int32_t            hfs_jnlinfoblkid;
	lck_rw_t	     hfs_global_lock;
	u_int32_t            hfs_global_lock_nesting;
	
	/* Notification variables: */
	unsigned long		hfs_notification_conditions;
	u_int32_t		hfs_freespace_notify_warninglimit;
	u_int32_t		hfs_freespace_notify_desiredlevel;

	/* time mounted and last mounted mod time "snapshot" */
	time_t		hfs_mount_time;
	time_t 		hfs_last_mounted_mtime;

	/* Metadata allocation zone variables: */
	u_int32_t	hfs_metazone_start;
	u_int32_t	hfs_metazone_end;
	u_int32_t	hfs_hotfile_start;
	u_int32_t	hfs_hotfile_end;
	int		hfs_hotfile_freeblks;
	int		hfs_hotfile_maxblks;
	int		hfs_overflow_maxblks;
	int		hfs_catalog_maxblks;

	/* Hot File Clustering variables: */
	lck_mtx_t       hfc_mutex;      /* serialize hot file stages */
	enum hfc_stage  hfc_stage;      /* what are we up to... */
	time_t		hfc_timebase;   /* recording period start time */
	time_t		hfc_timeout;    /* recording period stop time */
	void *		hfc_recdata;    /* recording data (opaque) */
	int		hfc_maxfiles;   /* maximum files to track */
	struct vnode *  hfc_filevp;

#ifdef HFS_SPARSE_DEV
	/* Sparse device variables: */
	struct vnode * hfs_backingfs_rootvp;
	int            hfs_sparsebandblks;
#endif
	size_t         hfs_max_inline_attrsize;

	lck_mtx_t      hfs_mutex;      /* protects access to hfsmount data */
	void          *hfs_freezing_proc;  /* who froze the fs */
	lck_rw_t       hfs_insync;     /* protects sync/freeze interaction */
} hfsmount_t;

typedef hfsmount_t  ExtendedVCB;

/* Aliases for legacy field names */
#define vcbCrDate          hfs_itime
#define vcbLsMod           hfs_mtime
#define vcbVolBkUp         hfs_btime
#define extentsRefNum      hfs_extents_vp
#define catalogRefNum      hfs_catalog_vp
#define allocationsRefNum  hfs_allocation_vp
#define vcbFilCnt          hfs_filecount
#define vcbDirCnt          hfs_dircount


/* HFS mount point flags */
#define HFS_READ_ONLY             0x001
#define HFS_UNKNOWN_PERMS         0x002
#define HFS_WRITEABLE_MEDIA       0x004
#define HFS_CLEANED_ORPHANS       0x008
#define HFS_X                     0x010
#define HFS_CASE_SENSITIVE        0x020
#define HFS_STANDARD              0x040
#define HFS_METADATA_ZONE         0x080
#define HFS_FRAGMENTED_FREESPACE  0x100
#define HFS_NEED_JNL_RESET        0x200
#define HFS_HAS_SPARSE_DEVICE     0x400


#define HFS_MOUNT_LOCK(hfsmp, metadata)                      \
	{                                                    \
		if ((metadata) && 1)                         \
			lck_mtx_lock(&(hfsmp)->hfs_mutex);   \
	}                                                    \

#define HFS_MOUNT_UNLOCK(hfsmp, metadata)                    \
	{                                                    \
		if ((metadata) && 1)                         \
			lck_mtx_unlock(&(hfsmp)->hfs_mutex); \
	}                                                    \

#define hfs_global_exclusive_lock_acquire(hfsmp) lck_rw_lock_exclusive(&(hfsmp)->hfs_global_lock)
#define hfs_global_exclusive_lock_release(hfsmp) lck_rw_done(&(hfsmp)->hfs_global_lock)


#define MAXHFSVNODELEN		31


typedef struct filefork FCB;


#define MAKE_INODE_NAME(name,linkno) \
	    (void) sprintf((name), "%s%d", HFS_INODE_PREFIX, (linkno))

#define HFS_INODE_PREFIX_LEN	5


#define HFS_AVERAGE_NAME_SIZE	22
#define AVERAGE_HFSDIRENTRY_SIZE  (8+HFS_AVERAGE_NAME_SIZE+4)

#define STD_DIRENT_LEN(namlen) \
	((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))

#define EXT_DIRENT_LEN(namlen) \
	((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 3) & ~3)


enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };


/* macro to determine if hfs or hfsplus */
#define ISHFSPLUS(VCB) ((VCB)->vcbSigWord == kHFSPlusSigWord)
#define ISHFS(VCB) ((VCB)->vcbSigWord == kHFSSigWord)


/*
 * Various ways to acquire a VFS mount point pointer:
 */
#define VTOVFS(VP)  vnode_mount((VP))
#define HFSTOVFS(HFSMP) ((HFSMP)->hfs_mp)
#define VCBTOVFS(VCB)   HFSTOVFS(VCB)

/*
 * Various ways to acquire an HFS mount point pointer:
 */
#define VTOHFS(VP)  ((struct hfsmount *)vfs_fsprivate(vnode_mount((VP))))
#define	VFSTOHFS(MP)  ((struct hfsmount *)vfs_fsprivate((MP)))
#define VCBTOHFS(VCB) (VCB)
#define FCBTOHFS(FCB)  ((struct hfsmount *)vfs_fsprivate(vnode_mount((FCB)->ff_cp->c_vp)))

/*
 * Various ways to acquire a VCB (legacy) pointer:
 */
#define VTOVCB(VP)       VTOHFS(VP)
#define VFSTOVCB(MP)     VFSTOHFS(MP)
#define HFSTOVCB(HFSMP)  (HFSMP)
#define FCBTOVCB(FCB)    FCBTOHFS(FCB)


#define HFS_KNOTE(vp, hint) KNOTE(&VTOC(vp)->c_knotes, (hint))


#define E_NONE	0
#define kHFSBlockSize 512

/*
 * Macros for getting the MDB/VH sector and offset
 */
#define HFS_PRI_SECTOR(blksize)          (1024 / (blksize))
#define HFS_PRI_OFFSET(blksize)          ((blksize) > 1024 ? 1024 : 0)

#define HFS_ALT_SECTOR(blksize, blkcnt)  (((blkcnt) - 1) - (512 / (blksize)))
#define HFS_ALT_OFFSET(blksize)          ((blksize) > 1024 ? (blksize) - 1024 : 0)


/*
 * HFS specific fcntl()'s
 */
#define HFS_BULKACCESS      (FCNTL_FS_SPECIFIC_BASE + 0x00001)
#define HFS_GET_MOUNT_TIME  (FCNTL_FS_SPECIFIC_BASE + 0x00002)
#define HFS_GET_LAST_MTIME  (FCNTL_FS_SPECIFIC_BASE + 0x00003)
#define HFS_GET_BOOT_INFO   (FCNTL_FS_SPECIFIC_BASE + 0x00004)
#define HFS_SET_BOOT_INFO   (FCNTL_FS_SPECIFIC_BASE + 0x00005)


/*
 *	This is the straight GMT conversion constant:
 *	00:00:00 January 1, 1970 - 00:00:00 January 1, 1904
 *	(3600 * 24 * ((365 * (1970 - 1904)) + (((1970 - 1904) / 4) + 1)))
 */
#define MAC_GMT_FACTOR		2082844800UL


time_t to_bsd_time(u_int32_t hfs_time);
u_int32_t to_hfs_time(time_t bsd_time);

int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
#define HFS_ALTFLUSH	1

extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);

extern int hfs_getnewvnode(struct hfsmount *hfsmp, struct vnode *dvp, struct componentname *cnp,
                           struct cat_desc *descp, int wantrsrc, struct cat_attr *attrp,
                           struct cat_fork *forkp, struct vnode **vpp);

extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);

extern void hfs_remove_orphans(struct hfsmount *);


short MacToVFSError(OSErr err);

extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, struct ucred *cred,
		struct proc *p, int invokesuperuserstatus);

u_long FindMetaDataDirectory(ExtendedVCB *vcb);

#define  kMaxSecsForFsync	5
#define  HFS_SYNCTRANS		1

extern int hfs_btsync(struct vnode *vp, int sync_transaction);
// used as a callback by the journaling code
extern void hfs_sync_metadata(void *arg);

short make_dir_entry(FCB **fileptr, char *name, u_int32_t fileID);


unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
                               unsigned long blockSizeLimit,
                               unsigned long baseMultiple);

OSErr	hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
		struct proc *p);
OSErr	hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
		off_t embeddedOffset, u_int64_t disksize, struct proc *p, void *args, kauth_cred_t cred);

extern int     hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
							   void *_args, off_t embeddedOffset, daddr64_t mdb_offset,
							   HFSMasterDirectoryBlock *mdbp, struct ucred *cred);
extern u_long  GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, const char *name,
						   struct cat_attr *fattr, struct cat_fork *forkinfo);

int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
		     unicode_to_hfs_func_t *get_hfsname);

int hfs_relconverter(u_int32_t encoding);

int hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen,
		ByteCount *actualDstLen, unsigned char* dstStr);

int utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr,
		Str31 dstStr);

int mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
		unsigned char* dstStr);

int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);

u_int32_t hfs_pickencoding(const u_int16_t *src, int len);

enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};

extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);

extern void hfs_setencodingbits(struct hfsmount *hfsmp, u_int32_t encoding);


extern void replace_desc(struct cnode *cp, struct cat_desc *cdp);

extern int hfs_namecmp(const char *, size_t, const char *, size_t);

extern int  hfs_virtualmetafile(struct cnode *);

void hfs_generate_volume_notifications(struct hfsmount *hfsmp);

__private_extern__ u_int32_t hfs_getencodingbias(void);
__private_extern__ void hfs_setencodingbias(u_int32_t bias);

extern int hfs_vgetrsrc(struct hfsmount *hfsmp, struct vnode *vp,
			struct vnode **rvpp, struct proc *p);

extern int hfs_update(struct vnode *, int);

extern int hfs_truncate(struct vnode *, off_t, int, int, vfs_context_t);

extern int hfs_fsync(struct vnode *, int, int, struct proc *);

extern int hfs_access(struct vnode *, mode_t, struct ucred *, struct proc *);

extern int hfs_vget(struct hfsmount *, cnid_t, struct vnode **, int);

extern int hfs_bmap(struct vnode *, daddr_t, struct vnode **, daddr64_t *, int *);

extern int hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid);

__private_extern__ int hfs_start_transaction(struct hfsmount *hfsmp);
__private_extern__ int hfs_end_transaction(struct hfsmount *hfsmp);

extern int  hfs_setextendedsecurity(struct hfsmount *hfsmp, int state);
extern void hfs_checkextendedsecurity(struct hfsmount *hfsmp);

extern int  hfs_extendfs(struct hfsmount *, u_int64_t, vfs_context_t);
extern int  hfs_truncatefs(struct hfsmount *, u_int64_t, vfs_context_t);

extern int  hfs_isallocated(struct hfsmount *, u_long, u_long);


/* HFS System file locking */
#define SFL_CATALOG     0x0001
#define SFL_EXTENTS     0x0002
#define SFL_BITMAP      0x0004
#define SFL_ATTRIBUTE   0x0008
#define SFL_VALIDMASK   (SFL_CATALOG | SFL_EXTENTS | SFL_BITMAP | SFL_ATTRIBUTE)

extern int  hfs_systemfile_lock(struct hfsmount *, int, enum hfslocktype);
extern void hfs_systemfile_unlock(struct hfsmount *, int);

#endif /* __APPLE_API_PRIVATE */
#endif /* KERNEL */
#endif /* __HFS__ */
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b	27	*/
1c79356b A	28
	29	#ifndef __HFS__
	30	#define __HFS__
	31
55e303ae A	32	#define HFS_SPARSE_DEV 1
55e303ae A	33
9bccf70c A	34	#include <sys/appleapiopts.h>
	35
	36	#ifdef KERNEL
	37	#ifdef __APPLE_API_PRIVATE
1c79356b	38	#include <sys/param.h>
1c79356b	39	#include <sys/queue.h>
9bccf70c	40	#include <sys/mount.h>
9bccf70c A	41	#include <sys/vnode.h>
9bccf70c A	42	#include <sys/quota.h>
1c79356b	43	#include <sys/dirent.h>
55e303ae	44	#include <sys/event.h>
1c79356b	45
91447636 A	46	#include <kern/locks.h>
91447636 A	47
b4c24cb9 A	48	#include <vfs/vfs_journal.h>
b4c24cb9 A	49
1c79356b	50	#include <hfs/hfs_format.h>
9bccf70c A	51	#include <hfs/hfs_catalog.h>
9bccf70c A	52	#include <hfs/hfs_cnode.h>
1c79356b A	53	#include <hfs/hfs_macos_defs.h>
1c79356b A	54	#include <hfs/hfs_encodings.h>
55e303ae	55	#include <hfs/hfs_hotfiles.h>
1c79356b	56
1c79356b A	57	/*
	58	* Just reported via MIG interface.
	59	*/
	60	#define VERSION_STRING "hfs-2 (4-12-99)"
	61
	62	#define HFS_LINK_MAX 32767
	63
9bccf70c A	64	#define HFS_MAX_DEFERED_ALLOC (1024*1024)
9bccf70c A	65
55e303ae A	66	// 32 gigs is a "big" file (i.e. one that when deleted
	67	// would touch enough data that we should break it into
	68	// multiple separate transactions
	69	#define HFS_BIGFILE_SIZE (32LL * 1024LL * 1024LL * 1024LL)
	70
1c79356b A	71
	72	enum { kMDBSize = 512 }; /* Size of I/O transfer to read entire MDB */
	73
	74	enum { kMasterDirectoryBlock = 2 }; /* MDB offset on disk in 512-byte blocks */
	75	enum { kMDBOffset = kMasterDirectoryBlock * 512 }; /* MDB offset on disk in bytes */
	76
91447636	77	#define kRootDirID kHFSRootFolderID
1c79356b	78
1c79356b	79
0b4e3aa0 A	80	/* number of locked buffer caches to hold for b-tree meta data */
0b4e3aa0 A	81	#define kMaxLockedMetaBuffers 32
1c79356b A	82
	83	/*
	84	* File type and creator for symbolic links
	85	*/
	86	enum {
9bccf70c A	87	kSymLinkFileType = 0x736C6E6B, /* 'slnk' */
9bccf70c A	88	kSymLinkCreator = 0x72686170 /* 'rhap' */
1c79356b A	89	};
1c79356b A	90
1c79356b A	91
	92	extern struct timezone gTimeZone;
	93
1c79356b	94
0b4e3aa0 A	95	/* How many free extents to cache per volume */
	96	#define kMaxFreeExtents 10
	97
9bccf70c A	98	/*
	99	* HFS_MINFREE gives the minimum acceptable percentage
	100	* of file system blocks which may be free (but this
	101	* minimum will never exceed HFS_MAXRESERVE bytes). If
	102	* the free block count drops below this level only the
	103	* superuser may continue to allocate blocks.
	104	*/
	105	#define HFS_MINFREE 1
55e303ae A	106	#define HFS_MAXRESERVE ((u_int64_t)(25010241024))
	107
	108	/*
	109	* The system distinguishes between the desirable low-disk
	110	* notifiaction levels for root volumes and non-root volumes.
	111	* The various thresholds are computed as a fraction of the
	112	* volume size, all capped at a certain fixed level
	113	*/
	114
	115	#define HFS_ROOTLOWDISKTRIGGERFRACTION 5
	116	#define HFS_ROOTLOWDISKTRIGGERLEVEL ((u_int64_t)(25010241024))
	117	#define HFS_ROOTLOWDISKSHUTOFFFRACTION 6
	118	#define HFS_ROOTLOWDISKSHUTOFFLEVEL ((u_int64_t)(37510241024))
	119
	120	#define HFS_LOWDISKTRIGGERFRACTION 1
	121	#define HFS_LOWDISKTRIGGERLEVEL ((u_int64_t)(5010241024))
	122	#define HFS_LOWDISKSHUTOFFFRACTION 2
	123	#define HFS_LOWDISKSHUTOFFLEVEL ((u_int64_t)(7510241024))
9bccf70c	124
1c79356b A	125	/* Internal Data structures*/
1c79356b A	126
0b4e3aa0	127
9bccf70c	128	#define kHFS_DamagedVolume 0x1 /* This volume has errors, unmount dirty */
1c79356b	129
9bccf70c A	130	/* XXX */
9bccf70c A	131	#define MARK_VOLUMEDAMAGED(fcb)
1c79356b	132
1c79356b A	133
	134	/* This structure describes the HFS specific mount structure data. */
	135	typedef struct hfsmount {
91447636 A	136	u_int32_t hfs_flags; /* see below */
91447636 A	137
1c79356b	138	/* Physical Description */
91447636 A	139	u_long hfs_phys_block_size; /* Always a multiple of 512 */
	140	daddr64_t hfs_phys_block_count; /* Num of PHYSICAL blocks of volume */
	141	daddr64_t hfs_alt_id_sector; /* location of alternate VH/MDB */
1c79356b A	142
	143	/* Access to VFS and devices */
	144	struct mount hfs_mp; / filesystem vfs structure */
	145	struct vnode hfs_devvp; / block device mounted vnode */
91447636 A	146	struct vnode * hfs_extents_vp;
	147	struct vnode * hfs_catalog_vp;
	148	struct vnode * hfs_allocation_vp;
	149	struct vnode * hfs_attribute_vp;
	150	dev_t hfs_raw_dev; /* device mounted */
	151	u_int32_t hfs_logBlockSize; /* Size of buffer cache buffer for I/O */
1c79356b A	152
1c79356b A	153	/* Default values for HFS standard and non-init access */
91447636 A	154	uid_t hfs_uid; /* uid to set as owner of the files */
	155	gid_t hfs_gid; /* gid to set as owner of the files */
	156	mode_t hfs_dir_mask; /* mask to and with directory protection bits */
	157	mode_t hfs_file_mask; /* mask to and with file protection bits */
	158	u_long hfs_encoding; /* Defualt encoding for non hfs+ volumes */
	159
	160	/* Persistent fields (on disk, dynamic) */
	161	time_t hfs_mtime; /* file system last modification time */
	162	u_int32_t hfs_filecount; /* number of files in file system */
	163	u_int32_t hfs_dircount; /* number of directories in file system */
	164	u_int32_t freeBlocks; /* free allocation blocks */
	165	u_int32_t nextAllocation; /* start of next allocation search */
	166	u_int32_t vcbNxtCNID; /* next unused catalog node ID */
	167	u_int32_t vcbWrCnt; /* file system write count */
	168	u_int64_t encodingsBitmap; /* in-use encodings */
	169	u_int16_t vcbNmFls; /* HFS Only - root dir file count */
	170	u_int16_t vcbNmRtDirs; /* HFS Only - root dir directory count */
	171
	172	/* Persistent fields (on disk, static) */
	173	u_int16_t vcbSigWord;
	174	int16_t vcbFlags;
	175	u_int32_t vcbAtrb;
	176	u_int32_t vcbJinfoBlock;
	177	time_t hfs_itime; /* file system creation time */
	178	time_t hfs_btime; /* file system last backup time */
	179	u_int32_t blockSize; /* size of allocation blocks */
	180	u_int32_t totalBlocks; /* total allocation blocks */
	181	int32_t vcbClpSiz;
	182	u_int32_t vcbFndrInfo[8];
	183	int16_t vcbVBMSt; /* HFS only */
	184	int16_t vcbAlBlSt; /* HFS only */
	185
	186	/* vcb stuff */
	187	u_int8_t vcbVN[256]; /* volume name in UTF-8 */
	188	u_int32_t volumeNameEncodingHint;
	189	u_int32_t hfsPlusIOPosOffset; /* Disk block where HFS+ starts */
	190	u_int32_t vcbVBMIOSize; /* volume bitmap I/O size */
	191
	192	/* cache of largest known free extents */
	193	u_int32_t vcbFreeExtCnt;
	194	HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
	195
	196	u_int32_t reserveBlocks; /* free block reserve */
	197	u_int32_t loanedBlocks; /* blocks on loan for delayed allocations */
	198
	199	u_int32_t localCreateDate; /* creation times for HFS+ volumes are in local time */
9bccf70c A	200	struct cat_desc hfs_privdir_desc;
9bccf70c A	201	struct cat_attr hfs_privdir_attr;
1c79356b A	202	u_int32_t hfs_metadata_createdate;
	203	hfs_to_unicode_func_t hfs_get_unicode;
	204	unicode_to_hfs_func_t hfs_get_hfsname;
9bccf70c	205
55e303ae	206	/* Quota variables: */
9bccf70c	207	struct quotafile hfs_qfiles[MAXQUOTAS]; /* quota files */
b4c24cb9	208
55e303ae	209	/* Journaling variables: */
b4c24cb9 A	210	void *jnl; // the journal for this volume (if one exists)
	211	struct vnode *jvp; // device where the journal lives (may be equal to devvp)
	212	u_int32_t jnl_start; // start block of the journal file (so we don't delete it)
55e303ae	213	u_int32_t jnl_size;
b4c24cb9 A	214	u_int32_t hfs_jnlfileid;
b4c24cb9 A	215	u_int32_t hfs_jnlinfoblkid;
91447636 A	216	lck_rw_t hfs_global_lock;
91447636 A	217	u_int32_t hfs_global_lock_nesting;
55e303ae A	218
	219	/* Notification variables: */
	220	unsigned long hfs_notification_conditions;
	221	u_int32_t hfs_freespace_notify_warninglimit;
	222	u_int32_t hfs_freespace_notify_desiredlevel;
	223
91447636 A	224	/* time mounted and last mounted mod time "snapshot" */
	225	time_t hfs_mount_time;
	226	time_t hfs_last_mounted_mtime;
	227
55e303ae A	228	/* Metadata allocation zone variables: */
	229	u_int32_t hfs_metazone_start;
	230	u_int32_t hfs_metazone_end;
	231	u_int32_t hfs_hotfile_start;
	232	u_int32_t hfs_hotfile_end;
	233	int hfs_hotfile_freeblks;
	234	int hfs_hotfile_maxblks;
	235	int hfs_overflow_maxblks;
	236	int hfs_catalog_maxblks;
	237
	238	/* Hot File Clustering variables: */
91447636	239	lck_mtx_t hfc_mutex; /* serialize hot file stages */
55e303ae A	240	enum hfc_stage hfc_stage; /* what are we up to... */
	241	time_t hfc_timebase; /* recording period start time */
	242	time_t hfc_timeout; /* recording period stop time */
	243	void * hfc_recdata; /* recording data (opaque) */
	244	int hfc_maxfiles; /* maximum files to track */
	245	struct vnode * hfc_filevp;
	246
	247	#ifdef HFS_SPARSE_DEV
	248	/* Sparse device variables: */
	249	struct vnode * hfs_backingfs_rootvp;
	250	int hfs_sparsebandblks;
	251	#endif
91447636 A	252	size_t hfs_max_inline_attrsize;
	253
	254	lck_mtx_t hfs_mutex; /* protects access to hfsmount data */
	255	void hfs_freezing_proc; / who froze the fs */
3a60a9f5	256	lck_rw_t hfs_insync; /* protects sync/freeze interaction */
1c79356b A	257	} hfsmount_t;
1c79356b A	258
91447636 A	259	typedef hfsmount_t ExtendedVCB;
	260
	261	/* Aliases for legacy field names */
	262	#define vcbCrDate hfs_itime
	263	#define vcbLsMod hfs_mtime
	264	#define vcbVolBkUp hfs_btime
	265	#define extentsRefNum hfs_extents_vp
	266	#define catalogRefNum hfs_catalog_vp
	267	#define allocationsRefNum hfs_allocation_vp
	268	#define vcbFilCnt hfs_filecount
	269	#define vcbDirCnt hfs_dircount
	270
55e303ae A	271
	272	/* HFS mount point flags */
	273	#define HFS_READ_ONLY 0x001
	274	#define HFS_UNKNOWN_PERMS 0x002
	275	#define HFS_WRITEABLE_MEDIA 0x004
	276	#define HFS_CLEANED_ORPHANS 0x008
	277	#define HFS_X 0x010
	278	#define HFS_CASE_SENSITIVE 0x020
	279	#define HFS_STANDARD 0x040
	280	#define HFS_METADATA_ZONE 0x080
	281	#define HFS_FRAGMENTED_FREESPACE 0x100
	282	#define HFS_NEED_JNL_RESET 0x200
55e303ae	283	#define HFS_HAS_SPARSE_DEVICE 0x400
55e303ae	284
1c79356b	285
91447636 A	286	#define HFS_MOUNT_LOCK(hfsmp, metadata) \
	287	{ \
	288	if ((metadata) && 1) \
	289	lck_mtx_lock(&(hfsmp)->hfs_mutex); \
	290	} \
	291
	292	#define HFS_MOUNT_UNLOCK(hfsmp, metadata) \
	293	{ \
	294	if ((metadata) && 1) \
	295	lck_mtx_unlock(&(hfsmp)->hfs_mutex); \
	296	} \
	297
	298	#define hfs_global_exclusive_lock_acquire(hfsmp) lck_rw_lock_exclusive(&(hfsmp)->hfs_global_lock)
	299	#define hfs_global_exclusive_lock_release(hfsmp) lck_rw_done(&(hfsmp)->hfs_global_lock)
	300
b4c24cb9	301
1c79356b	302	#define MAXHFSVNODELEN 31
1c79356b	303
1c79356b	304
9bccf70c	305	typedef struct filefork FCB;
1c79356b	306
1c79356b A	307
	308	#define MAKE_INODE_NAME(name,linkno) \
	309	(void) sprintf((name), "%s%d", HFS_INODE_PREFIX, (linkno))
	310
743b1565	311	#define HFS_INODE_PREFIX_LEN 5
1c79356b	312
1c79356b	313
9bccf70c A	314	#define HFS_AVERAGE_NAME_SIZE 22
9bccf70c A	315	#define AVERAGE_HFSDIRENTRY_SIZE (8+HFS_AVERAGE_NAME_SIZE+4)
1c79356b	316
91447636 A	317	#define STD_DIRENT_LEN(namlen) \
91447636 A	318	((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
1c79356b	319
91447636 A	320	#define EXT_DIRENT_LEN(namlen) \
91447636 A	321	((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 3) & ~3)
1c79356b	322
1c79356b A	323
	324	enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };
	325
1c79356b A	326
	327	/* macro to determine if hfs or hfsplus */
	328	#define ISHFSPLUS(VCB) ((VCB)->vcbSigWord == kHFSPlusSigWord)
	329	#define ISHFS(VCB) ((VCB)->vcbSigWord == kHFSSigWord)
	330
	331
1c79356b A	332	/*
	333	* Various ways to acquire a VFS mount point pointer:
	334	*/
91447636	335	#define VTOVFS(VP) vnode_mount((VP))
1c79356b	336	#define HFSTOVFS(HFSMP) ((HFSMP)->hfs_mp)
91447636	337	#define VCBTOVFS(VCB) HFSTOVFS(VCB)
1c79356b A	338
	339	/*
	340	* Various ways to acquire an HFS mount point pointer:
	341	*/
91447636 A	342	#define VTOHFS(VP) ((struct hfsmount *)vfs_fsprivate(vnode_mount((VP))))
	343	#define VFSTOHFS(MP) ((struct hfsmount *)vfs_fsprivate((MP)))
	344	#define VCBTOHFS(VCB) (VCB)
	345	#define FCBTOHFS(FCB) ((struct hfsmount *)vfs_fsprivate(vnode_mount((FCB)->ff_cp->c_vp)))
1c79356b A	346
1c79356b A	347	/*
91447636	348	* Various ways to acquire a VCB (legacy) pointer:
1c79356b	349	*/
91447636 A	350	#define VTOVCB(VP) VTOHFS(VP)
	351	#define VFSTOVCB(MP) VFSTOHFS(MP)
	352	#define HFSTOVCB(HFSMP) (HFSMP)
	353	#define FCBTOVCB(FCB) FCBTOHFS(FCB)
1c79356b A	354
1c79356b A	355
55e303ae A	356	#define HFS_KNOTE(vp, hint) KNOTE(&VTOC(vp)->c_knotes, (hint))
	357
	358
1c79356b A	359	#define E_NONE 0
1c79356b A	360	#define kHFSBlockSize 512
1c79356b	361
9bccf70c A	362	/*
	363	* Macros for getting the MDB/VH sector and offset
	364	*/
	365	#define HFS_PRI_SECTOR(blksize) (1024 / (blksize))
	366	#define HFS_PRI_OFFSET(blksize) ((blksize) > 1024 ? 1024 : 0)
d52fe63f A	367
	368	#define HFS_ALT_SECTOR(blksize, blkcnt) (((blkcnt) - 1) - (512 / (blksize)))
	369	#define HFS_ALT_OFFSET(blksize) ((blksize) > 1024 ? (blksize) - 1024 : 0)
	370
91447636 A	371
	372	/*
	373	* HFS specific fcntl()'s
	374	*/
	375	#define HFS_BULKACCESS (FCNTL_FS_SPECIFIC_BASE + 0x00001)
	376	#define HFS_GET_MOUNT_TIME (FCNTL_FS_SPECIFIC_BASE + 0x00002)
	377	#define HFS_GET_LAST_MTIME (FCNTL_FS_SPECIFIC_BASE + 0x00003)
	378	#define HFS_GET_BOOT_INFO (FCNTL_FS_SPECIFIC_BASE + 0x00004)
	379	#define HFS_SET_BOOT_INFO (FCNTL_FS_SPECIFIC_BASE + 0x00005)
	380
	381
1c79356b A	382	/*
	383	* This is the straight GMT conversion constant:
	384	* 00:00:00 January 1, 1970 - 00:00:00 January 1, 1904
	385	* (3600 * 24 * ((365 * (1970 - 1904)) + (((1970 - 1904) / 4) + 1)))
	386	*/
	387	#define MAC_GMT_FACTOR 2082844800UL
	388
1c79356b	389
91447636 A	390	time_t to_bsd_time(u_int32_t hfs_time);
91447636 A	391	u_int32_t to_hfs_time(time_t bsd_time);
1c79356b	392
9bccf70c A	393	int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
9bccf70c A	394	#define HFS_ALTFLUSH 1
1c79356b	395
55e303ae	396	extern int hfsUnmount(struct hfsmount hfsmp, struct proc p);
1c79356b	397
91447636	398	extern int hfs_getnewvnode(struct hfsmount hfsmp, struct vnode dvp, struct componentname *cnp,
9bccf70c A	399	struct cat_desc descp, int wantrsrc, struct cat_attr attrp,
	400	struct cat_fork forkp, struct vnode *vpp);
	401
9bccf70c A	402	extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);
9bccf70c A	403
b4c24cb9 A	404	extern void hfs_remove_orphans(struct hfsmount *);
b4c24cb9 A	405
1c79356b A	406
1c79356b A	407	short MacToVFSError(OSErr err);
1c79356b	408
9bccf70c A	409	extern int hfs_owner_rights(struct hfsmount hfsmp, uid_t cnode_uid, struct ucred cred,
	410	struct proc *p, int invokesuperuserstatus);
	411
1c79356b A	412	u_long FindMetaDataDirectory(ExtendedVCB *vcb);
1c79356b A	413
9bccf70c A	414	#define kMaxSecsForFsync 5
	415	#define HFS_SYNCTRANS 1
	416
	417	extern int hfs_btsync(struct vnode *vp, int sync_transaction);
b4c24cb9 A	418	// used as a callback by the journaling code
b4c24cb9 A	419	extern void hfs_sync_metadata(void *arg);
1c79356b A	420
	421	short make_dir_entry(FCB *fileptr, char name, u_int32_t fileID);
	422
9bccf70c	423
1c79356b A	424	unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
	425	unsigned long blockSizeLimit,
	426	unsigned long baseMultiple);
	427
	428	OSErr hfs_MountHFSVolume(struct hfsmount hfsmp, HFSMasterDirectoryBlock mdb,
d52fe63f	429	struct proc *p);
1c79356b	430	OSErr hfs_MountHFSPlusVolume(struct hfsmount hfsmp, HFSPlusVolumeHeader vhp,
91447636	431	off_t embeddedOffset, u_int64_t disksize, struct proc p, void args, kauth_cred_t cred);
b4c24cb9 A	432
b4c24cb9 A	433	extern int hfs_early_journal_init(struct hfsmount hfsmp, HFSPlusVolumeHeader vhp,
91447636	434	void *_args, off_t embeddedOffset, daddr64_t mdb_offset,
b4c24cb9	435	HFSMasterDirectoryBlock mdbp, struct ucred cred);
91447636 A	436	extern u_long GetFileInfo(ExtendedVCB vcb, u_int32_t dirid, const char name,
91447636 A	437	struct cat_attr fattr, struct cat_fork forkinfo);
1c79356b A	438
	439	int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
	440	unicode_to_hfs_func_t *get_hfsname);
	441
	442	int hfs_relconverter(u_int32_t encoding);
	443
	444	int hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen,
	445	ByteCount actualDstLen, unsigned char dstStr);
	446
	447	int utf8_to_hfs(ExtendedVCB vcb, ByteCount srcLen, const unsigned char srcStr,
	448	Str31 dstStr);
	449
	450	int mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
	451	unsigned char* dstStr);
	452
	453	int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);
	454
0b4e3aa0 A	455	u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
0b4e3aa0 A	456
9bccf70c A	457	enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};
	458
	459	extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);
	460
	461	extern void hfs_setencodingbits(struct hfsmount *hfsmp, u_int32_t encoding);
	462
	463
	464	extern void replace_desc(struct cnode cp, struct cat_desc cdp);
	465
d7e50217 A	466	extern int hfs_namecmp(const char , size_t, const char , size_t);
d7e50217 A	467
55e303ae A	468	extern int hfs_virtualmetafile(struct cnode *);
	469
	470	void hfs_generate_volume_notifications(struct hfsmount *hfsmp);
	471
91447636 A	472	__private_extern__ u_int32_t hfs_getencodingbias(void);
	473	__private_extern__ void hfs_setencodingbias(u_int32_t bias);
	474
	475	extern int hfs_vgetrsrc(struct hfsmount hfsmp, struct vnode vp,
	476	struct vnode *rvpp, struct proc p);
	477
	478	extern int hfs_update(struct vnode *, int);
	479
	480	extern int hfs_truncate(struct vnode *, off_t, int, int, vfs_context_t);
	481
	482	extern int hfs_fsync(struct vnode , int, int, struct proc );
	483
	484	extern int hfs_access(struct vnode , mode_t, struct ucred , struct proc *);
	485
	486	extern int hfs_vget(struct hfsmount , cnid_t, struct vnode *, int);
	487
	488	extern int hfs_bmap(struct vnode , daddr_t, struct vnode , daddr64_t , int *);
	489
	490	extern int hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid);
	491
	492	__private_extern__ int hfs_start_transaction(struct hfsmount *hfsmp);
	493	__private_extern__ int hfs_end_transaction(struct hfsmount *hfsmp);
	494
	495	extern int hfs_setextendedsecurity(struct hfsmount *hfsmp, int state);
	496	extern void hfs_checkextendedsecurity(struct hfsmount *hfsmp);
	497
	498	extern int hfs_extendfs(struct hfsmount *, u_int64_t, vfs_context_t);
	499	extern int hfs_truncatefs(struct hfsmount *, u_int64_t, vfs_context_t);
	500
	501	extern int hfs_isallocated(struct hfsmount *, u_long, u_long);
	502
	503
	504	/* HFS System file locking */
	505	#define SFL_CATALOG 0x0001
	506	#define SFL_EXTENTS 0x0002
	507	#define SFL_BITMAP 0x0004
	508	#define SFL_ATTRIBUTE 0x0008
	509	#define SFL_VALIDMASK (SFL_CATALOG \| SFL_EXTENTS \| SFL_BITMAP \| SFL_ATTRIBUTE)
	510
	511	extern int hfs_systemfile_lock(struct hfsmount *, int, enum hfslocktype);
	512	extern void hfs_systemfile_unlock(struct hfsmount *, int);
d7e50217	513
9bccf70c A	514	#endif /* __APPLE_API_PRIVATE */
9bccf70c A	515	#endif /* KERNEL */
1c79356b	516	#endif /* __HFS__ */