xnu-1228.7.58.tar.gz

[apple/xnu.git] / bsd / sys / mount.h

/*
 * Copyright (c) 2000-2007 Apple 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@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1989, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)mount.h	8.21 (Berkeley) 5/20/95
 */
/*
 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
 * support for mandatory and extensible security protections.  This notice
 * is included in support of clause 2.2 (b) of the Apple Public License,
 * Version 2.0.
 */


#ifndef _SYS_MOUNT_H_
#define	_SYS_MOUNT_H_

#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
#include <sys/attr.h>		/* needed for vol_capabilities_attr_t */

#ifndef KERNEL
#include <stdint.h>
#include <sys/ucred.h>
#include <sys/queue.h>		/* XXX needed for user builds */
#else
#include <sys/kernel_types.h>
#endif

typedef struct fsid { int32_t val[2]; } fsid_t;	/* file system id type */

/*
 * file system statistics
 */

#define	MFSNAMELEN	15	/* length of fs type name, not inc. null */
#define	MFSTYPENAMELEN	16	/* length of fs type name including null */
#define	MNAMELEN	90	/* length of buffer for returned name */

#define __DARWIN_STRUCT_STATFS64 { \
	uint32_t	f_bsize;	/* fundamental file system block size */ \
	int32_t		f_iosize;	/* optimal transfer block size */ \
	uint64_t	f_blocks;	/* total data blocks in file system */ \
	uint64_t	f_bfree;	/* free blocks in fs */ \
	uint64_t	f_bavail;	/* free blocks avail to non-superuser */ \
	uint64_t	f_files;	/* total file nodes in file system */ \
	uint64_t	f_ffree;	/* free file nodes in fs */ \
	fsid_t		f_fsid;		/* file system id */ \
	uid_t		f_owner;	/* user that mounted the filesystem */ \
	uint32_t	f_type;		/* type of filesystem */ \
	uint32_t	f_flags;	/* copy of mount exported flags */ \
	uint32_t	f_fssubtype;	/* fs sub-type (flavor) */ \
	char		f_fstypename[MFSTYPENAMELEN];	/* fs type name */ \
	char		f_mntonname[MAXPATHLEN];	/* directory on which mounted */ \
	char		f_mntfromname[MAXPATHLEN];	/* mounted filesystem */ \
	uint32_t	f_reserved[8];	/* For future use */ \
}

struct statfs64 __DARWIN_STRUCT_STATFS64;

#if __DARWIN_64_BIT_INO_T

struct statfs __DARWIN_STRUCT_STATFS64;

#else /* !__DARWIN_64_BIT_INO_T */

/*
 * LP64 - WARNING - must be kept in sync with struct user_statfs in mount_internal.h.
 */
struct statfs {
	short	f_otype;		/* TEMPORARY SHADOW COPY OF f_type */
	short	f_oflags;		/* TEMPORARY SHADOW COPY OF f_flags */
	long	f_bsize;		/* fundamental file system block size */
	long	f_iosize;		/* optimal transfer block size */
	long	f_blocks;		/* total data blocks in file system */
	long	f_bfree;		/* free blocks in fs */
	long	f_bavail;		/* free blocks avail to non-superuser */
	long	f_files;		/* total file nodes in file system */
	long	f_ffree;		/* free file nodes in fs */
	fsid_t	f_fsid;			/* file system id */
	uid_t	f_owner;		/* user that mounted the filesystem */
	short	f_reserved1;	/* spare for later */
	short	f_type;			/* type of filesystem */
	long	f_flags;		/* copy of mount exported flags */
	long    f_reserved2[2];	/* reserved for future use */
	char	f_fstypename[MFSNAMELEN]; /* fs type name */
	char	f_mntonname[MNAMELEN];	/* directory on which mounted */
	char	f_mntfromname[MNAMELEN];/* mounted filesystem */
#if COMPAT_GETFSSTAT
	char	f_reserved3[0];	/* For alignment */
	long	f_reserved4[0];	/* For future use */
#else
	char	f_reserved3;	/* For alignment */
	long	f_reserved4[4];	/* For future use */
#endif
};

#endif /* __DARWIN_64_BIT_INO_T */

#pragma pack(4)

struct vfsstatfs {
	uint32_t	f_bsize;	/* fundamental file system block size */
	size_t		f_iosize;	/* optimal transfer block size */
	uint64_t	f_blocks;	/* total data blocks in file system */
	uint64_t	f_bfree;	/* free blocks in fs */
	uint64_t	f_bavail;	/* free blocks avail to non-superuser */
	uint64_t	f_bused;	/* free blocks avail to non-superuser */
	uint64_t	f_files;	/* total file nodes in file system */
	uint64_t	f_ffree;	/* free file nodes in fs */
	fsid_t		f_fsid;		/* file system id */
	uid_t		f_owner;	/* user that mounted the filesystem */
	uint64_t	f_flags;	/* copy of mount exported flags */ 
	char		f_fstypename[MFSTYPENAMELEN];/* fs type name inclus */
	char		f_mntonname[MAXPATHLEN];/* directory on which mounted */
	char		f_mntfromname[MAXPATHLEN];/* mounted filesystem */
	uint32_t	f_fssubtype;     /* fs sub-type (flavor) */
	void		*f_reserved[2];		/* For future use == 0 */
};

#pragma pack()

#ifdef KERNEL
/*
 * Kernel level support for the VFS_GETATTR(), VFS_SETATTR() for use in
 * implementation of filesystem KEXTs, and by the vfs_getattr() and
 * vfs_setattr() KPIs.
 */

#define VFSATTR_INIT(s)			((s)->f_supported = (s)->f_active = 0LL)
#define VFSATTR_SET_SUPPORTED(s, a)	((s)->f_supported |= VFSATTR_ ## a)
#define VFSATTR_IS_SUPPORTED(s, a)	((s)->f_supported & VFSATTR_ ## a)
#define VFSATTR_CLEAR_ACTIVE(s, a)	((s)->f_active &= ~VFSATTR_ ## a)
#define VFSATTR_IS_ACTIVE(s, a)		((s)->f_active & VFSATTR_ ## a)
#define VFSATTR_ALL_SUPPORTED(s)	(((s)->f_active & (s)->f_supported) == (s)->f_active)
#define VFSATTR_WANTED(s, a)		((s)->f_active |= VFSATTR_ ## a)
#define VFSATTR_RETURN(s, a, x)		do { (s)-> a = (x); VFSATTR_SET_SUPPORTED(s, a);} while(0)

#define VFSATTR_f_objcount		(1LL<<  0)
#define VFSATTR_f_filecount		(1LL<<  1)
#define VFSATTR_f_dircount		(1LL<<  2)
#define VFSATTR_f_maxobjcount		(1LL<<  3)
#define VFSATTR_f_bsize			(1LL<< 4)
#define VFSATTR_f_iosize		(1LL<<  5)
#define VFSATTR_f_blocks		(1LL<<  6)
#define VFSATTR_f_bfree			(1LL<<  7)
#define VFSATTR_f_bavail		(1LL<<  8)
#define VFSATTR_f_bused			(1LL<<  9)
#define VFSATTR_f_files			(1LL<< 10)
#define VFSATTR_f_ffree			(1LL<< 11)
#define VFSATTR_f_fsid			(1LL<< 12)
#define VFSATTR_f_owner			(1LL<< 13)
#define VFSATTR_f_capabilities		(1LL<< 14)
#define VFSATTR_f_attributes		(1LL<< 15)
#define VFSATTR_f_create_time		(1LL<< 16)
#define VFSATTR_f_modify_time		(1LL<< 17)
#define VFSATTR_f_access_time		(1LL<< 18)
#define VFSATTR_f_backup_time		(1LL<< 19)
#define VFSATTR_f_fssubtype		(1LL<< 20)
#define VFSATTR_f_vol_name		(1LL<< 21)
#define VFSATTR_f_signature		(1LL<< 22)
#define VFSATTR_f_carbon_fsid		(1LL<< 23)

/*
 * Argument structure.
 */
#pragma pack(4)

struct vfs_attr {
	uint64_t	f_supported;
	uint64_t	f_active;

	uint64_t	f_objcount;	/* number of filesystem objects in volume */
	uint64_t	f_filecount;	/* ... files */
	uint64_t	f_dircount;	/* ... directories */
	uint64_t	f_maxobjcount;	/* maximum number of filesystem objects */
	
	uint32_t	f_bsize;	/* block size for the below size values */
	size_t		f_iosize;	/* optimal transfer block size */
	uint64_t	f_blocks;	/* total data blocks in file system */
	uint64_t	f_bfree;	/* free blocks in fs */
	uint64_t	f_bavail;	/* free blocks avail to non-superuser */
	uint64_t	f_bused;	/* blocks in use */
	uint64_t	f_files;	/* total file nodes in file system */
	uint64_t	f_ffree;	/* free file nodes in fs */
	fsid_t		f_fsid;		/* file system id */
	uid_t		f_owner;	/* user that mounted the filesystem */

 	vol_capabilities_attr_t f_capabilities;
	vol_attributes_attr_t f_attributes;

	struct timespec	f_create_time;	/* creation time */
	struct timespec	f_modify_time;	/* last modification time */
	struct timespec f_access_time;	/* time of last access */
	struct timespec	f_backup_time;	/* last backup time */

	uint32_t	f_fssubtype;	/* filesystem subtype */

	char		*f_vol_name;	/* volume name */

	uint16_t	f_signature;	/* used for ATTR_VOL_SIGNATURE, Carbon's FSVolumeInfo.signature */
	uint16_t	f_carbon_fsid;	/* same as Carbon's FSVolumeInfo.filesystemID */
};

#pragma pack()

#endif	/* KERNEL */

/*
 * User specifiable flags.
 *
 * Unmount uses MNT_FORCE flag.
 */
#define	MNT_RDONLY	0x00000001	/* read only filesystem */
#define	MNT_SYNCHRONOUS	0x00000002	/* file system written synchronously */
#define	MNT_NOEXEC	0x00000004	/* can't exec from filesystem */
#define	MNT_NOSUID	0x00000008	/* don't honor setuid bits on fs */
#define	MNT_NODEV	0x00000010	/* don't interpret special files */
#define	MNT_UNION	0x00000020	/* union with underlying filesystem */
#define	MNT_ASYNC	0x00000040	/* file system written asynchronously */

/*
 * NFS export related mount flags.
 */
#define	MNT_EXPORTED	0x00000100	/* file system is exported */

/*
 * MAC labeled / "quarantined" flag
 */
#define MNT_QUARANTINE	0x00000400	/* file system is quarantined */

/*
 * Flags set by internal operations.
 */
#define	MNT_LOCAL	0x00001000	/* filesystem is stored locally */
#define	MNT_QUOTA	0x00002000	/* quotas are enabled on filesystem */
#define	MNT_ROOTFS	0x00004000	/* identifies the root filesystem */
#define	MNT_DOVOLFS	0x00008000	/* FS supports volfs (deprecated flag in Mac OS X 10.5) */


#define MNT_DONTBROWSE	0x00100000	/* file system is not appropriate path to user data */
#define MNT_IGNORE_OWNERSHIP 0x00200000 /* VFS will ignore ownership information on filesystem objects */
#define MNT_AUTOMOUNTED 0x00400000	/* filesystem was mounted by automounter */
#define MNT_JOURNALED   0x00800000  	/* filesystem is journaled */
#define MNT_NOUSERXATTR	0x01000000	/* Don't allow user extended attributes */
#define MNT_DEFWRITE	0x02000000	/* filesystem should defer writes */
#define MNT_MULTILABEL	0x04000000	/* MAC support for individual labels */
#define MNT_NOATIME	0x10000000	/* disable update of file access time */

/* backwards compatibility only */
#define MNT_UNKNOWNPERMISSIONS MNT_IGNORE_OWNERSHIP


/*
 * XXX I think that this could now become (~(MNT_CMDFLAGS))
 * but the 'mount' program may need changing to handle this.
 */
#define	MNT_VISFLAGMASK	(MNT_RDONLY	| MNT_SYNCHRONOUS | MNT_NOEXEC	| \
			MNT_NOSUID	| MNT_NODEV	| MNT_UNION	| \
			MNT_ASYNC	| MNT_EXPORTED	| MNT_QUARANTINE | \
			MNT_LOCAL	| MNT_QUOTA | \
			MNT_ROOTFS	| MNT_DOVOLFS	| MNT_DONTBROWSE | \
			MNT_IGNORE_OWNERSHIP | MNT_AUTOMOUNTED | MNT_JOURNALED | \
			MNT_NOUSERXATTR | MNT_DEFWRITE	| MNT_MULTILABEL | MNT_NOATIME)
/*
 * External filesystem command modifier flags.
 * Unmount can use the MNT_FORCE flag.
 * XXX These are not STATES and really should be somewhere else.
 * External filesystem control flags.
 */
#define	MNT_UPDATE	0x00010000	/* not a real mount, just an update */
#define	MNT_RELOAD	0x00040000	/* reload filesystem data */
#define	MNT_FORCE	0x00080000	/* force unmount or readonly change */
#define MNT_CMDFLAGS	(MNT_UPDATE|MNT_RELOAD|MNT_FORCE)



/*
 * Sysctl CTL_VFS definitions.
 *
 * Second level identifier specifies which filesystem. Second level
 * identifier VFS_GENERIC returns information about all filesystems.
 */
#define	VFS_GENERIC		0	/* generic filesystem information */
#define VFS_NUMMNTOPS		1	/* int: total num of vfs mount/unmount operations */
/*
 * Third level identifiers for VFS_GENERIC are given below; third
 * level identifiers for specific filesystems are given in their
 * mount specific header files.
 */
#define VFS_MAXTYPENUM	1	/* int: highest defined filesystem type */
#define VFS_CONF	2	/* struct: vfsconf for filesystem given
				   as next argument */
#define VFS_SET_PACKAGE_EXTS 3	/* set package extension list */

/*
 * Flags for various system call interfaces.
 *
 * waitfor flags to vfs_sync() and getfsstat()
 */
#define MNT_WAIT	1	/* synchronously wait for I/O to complete */
#define MNT_NOWAIT	2	/* start all I/O, but do not wait for it */


#ifndef KERNEL
struct mount;
typedef struct mount * mount_t;
struct vnode;
typedef struct vnode * vnode_t;
#endif

struct vfsconf {
	struct	vfsops *vfc_vfsops;	/* filesystem operations vector */
	char	vfc_name[MFSNAMELEN];	/* filesystem type name */
	int	vfc_typenum;		/* historic filesystem type number */
	int	vfc_refcount;		/* number mounted of this type */
	int	vfc_flags;		/* permanent flags */
	int	(*vfc_mountroot)(mount_t, vnode_t);	/* if != NULL, routine to mount root */
	struct	vfsconf *vfc_next;	/* next in list */
};

struct vfsidctl {
	int		vc_vers;	/* should be VFSIDCTL_VERS1 (below) */
	fsid_t		vc_fsid;	/* fsid to operate on. */
	void		*vc_ptr;	/* pointer to data structure. */
	size_t		vc_len;		/* sizeof said structure. */
	u_int32_t	vc_spare[12];	/* spare (must be zero). */
};


/* vfsidctl API version. */
#define VFS_CTL_VERS1	0x01

#ifdef KERNEL

/* LP64 version of vfsconf.  all pointers 
 * grow when we're dealing with a 64-bit process.
 * WARNING - keep in sync with vfsconf
 */
struct user_vfsconf {
       user_addr_t 	vfc_vfsops;				/* filesystem operations vector */
       char			vfc_name[MFSNAMELEN];	/* filesystem type name */
       int			vfc_typenum;            /* historic filesystem type number */
       int			vfc_refcount;           /* number mounted of this type */
       int			vfc_flags;				/* permanent flags */
       user_addr_t 	vfc_mountroot __attribute((aligned(8)));	/* if != NULL, routine to mount root */
       user_addr_t 	vfc_next;				/* next in list */
};

struct user_vfsidctl {
       int				vc_vers;        /* should be VFSIDCTL_VERS1 (below) */
       fsid_t			vc_fsid;		/* fsid to operate on. */
       user_addr_t 		vc_ptr __attribute((aligned(8)));	/* pointer to data structure. */
       user_size_t 		vc_len;			/* sizeof said structure. */
       u_int32_t		vc_spare[12];   /* spare (must be zero). */
};

#endif /* KERNEL */

/*
 * New style VFS sysctls, do not reuse/conflict with the namespace for
 * private sysctls.
 */
#define VFS_CTL_STATFS	0x00010001	/* statfs */
#define VFS_CTL_UMOUNT	0x00010002	/* unmount */
#define VFS_CTL_QUERY	0x00010003	/* anything wrong? (vfsquery) */
#define VFS_CTL_NEWADDR	0x00010004	/* reconnect to new address */
#define VFS_CTL_TIMEO	0x00010005	/* set timeout for vfs notification */
#define VFS_CTL_NOLOCKS	0x00010006	/* disable file locking */

struct vfsquery {
	u_int32_t	vq_flags;
	u_int32_t	vq_spare[31];
};

/* vfsquery flags */
#define VQ_NOTRESP	0x0001	/* server down */
#define VQ_NEEDAUTH	0x0002	/* server bad auth */
#define VQ_LOWDISK	0x0004	/* we're low on space */
#define VQ_MOUNT	0x0008	/* new filesystem arrived */
#define VQ_UNMOUNT	0x0010	/* filesystem has left */
#define VQ_DEAD		0x0020	/* filesystem is dead, needs force unmount */
#define VQ_ASSIST	0x0040	/* filesystem needs assistance from external program */
#define VQ_NOTRESPLOCK	0x0080	/* server lockd down */
#define VQ_UPDATE	0x0100	/* filesystem information has changed */
#define VQ_FLAG0200	0x0200	/* placeholder */
#define VQ_FLAG0400	0x0400	/* placeholder */
#define VQ_FLAG0800	0x0800	/* placeholder */
#define VQ_FLAG1000	0x1000	/* placeholder */
#define VQ_FLAG2000	0x2000	/* placeholder */
#define VQ_FLAG4000	0x4000	/* placeholder */
#define VQ_FLAG8000	0x8000	/* placeholder */


#ifdef KERNEL

/* Structure for setting device IO parameters per mount point */
struct vfsioattr {
	u_int32_t	io_maxreadcnt;		/* Max. byte count for read */
	u_int32_t	io_maxwritecnt;		/* Max. byte count for write */
	u_int32_t	io_segreadcnt;		/* Max. segment count for read */
	u_int32_t	io_segwritecnt;		/* Max. segment count for write */
	u_int32_t	io_maxsegreadsize;	/* Max. segment read size  */
	u_int32_t	io_maxsegwritesize;	/* Max. segment write size */
	u_int32_t	io_devblocksize;	/* the underlying device block size */
	u_int32_t	io_flags;			/* flags for underlying device */
	void *		io_reserved[2];		/* extended attribute information */
};

#define VFS_IOATTR_FLAGS_FUA	0x01	/* Write-through cache supported */

/*
 * Filesystem Registration information
 */
#define VFS_TBLTHREADSAFE		0x0001
#define VFS_TBLFSNODELOCK		0x0002
#define VFS_TBLNOTYPENUM		0x0008
#define VFS_TBLLOCALVOL			0x0010
#define VFS_TBL64BITREADY		0x0020
#define VFS_TBLNATIVEXATTR		0x0040
#define VFS_TBLDIRLINKS			0x0080
#define VFS_TBLUNMOUNT_PREFLIGHT	0x0100	/* does a preflight check before unmounting */
#define VFS_TBLGENERICMNTARGS		0x0200  /* force generic mount args for local fs */
#define VFS_TBLREADDIR_EXTENDED		0x0400  /* fs supports VNODE_READDIR_EXTENDED */
#define	VFS_TBLNOMACLABEL		0x1000

struct vfs_fsentry {
	struct vfsops * vfe_vfsops;	/* vfs operations */
	int		vfe_vopcnt;	/* # of vnodeopv_desc being registered (reg, spec, fifo ...) */
	struct vnodeopv_desc ** vfe_opvdescs; /* null terminated;  */
	int			vfe_fstypenum;	/* historic filesystem type number */
	char		vfe_fsname[MFSNAMELEN];	/* filesystem type name */
	uint32_t	vfe_flags;		/* defines the FS capabilities */
    void *		vfe_reserv[2];	/* reserved for future use; set this to zero*/
 };



struct vfsops {
	int  (*vfs_mount)(struct mount *mp, vnode_t devvp, user_addr_t data, vfs_context_t context);
	int  (*vfs_start)(struct mount *mp, int flags, vfs_context_t context);
	int  (*vfs_unmount)(struct mount *mp, int mntflags, vfs_context_t context);
	int  (*vfs_root)(struct mount *mp, struct vnode **vpp, vfs_context_t context);
	int  (*vfs_quotactl)(struct mount *mp, int cmds, uid_t uid, caddr_t arg, vfs_context_t context);
	int  (*vfs_getattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
/*	int  (*vfs_statfs)(struct mount *mp, struct vfsstatfs *sbp, vfs_context_t context);*/
	int  (*vfs_sync)(struct mount *mp, int waitfor, vfs_context_t context);
	int  (*vfs_vget)(struct mount *mp, ino64_t ino, struct vnode **vpp, vfs_context_t context);
	int  (*vfs_fhtovp)(struct mount *mp, int fhlen, unsigned char *fhp, struct vnode **vpp,
	                   vfs_context_t context);
	int  (*vfs_vptofh)(struct vnode *vp, int *fhlen, unsigned char *fhp, vfs_context_t context);
	int  (*vfs_init)(struct vfsconf *);
	int  (*vfs_sysctl)(int *, u_int, user_addr_t, size_t *, user_addr_t, size_t, vfs_context_t context);
	int  (*vfs_setattr)(struct mount *mp, struct vfs_attr *, vfs_context_t context);
	void *vfs_reserved[7];
};


/*
 * flags passed into vfs_iterate
 */

/*
 * return values from callback
 */
#define VFS_RETURNED		0	/* done with vnode, reference can be dropped */
#define VFS_RETURNED_DONE	1	/* done with vnode, reference can be dropped, terminate iteration */
#define VFS_CLAIMED		2	/* don't drop reference */
#define VFS_CLAIMED_DONE	3	/* don't drop reference, terminate iteration */


__BEGIN_DECLS
/*
 * prototypes for exported VFS operations
 */
extern int VFS_MOUNT(mount_t, vnode_t, user_addr_t, vfs_context_t);
extern int VFS_START(mount_t, int, vfs_context_t);
extern int VFS_UNMOUNT(mount_t, int, vfs_context_t);
extern int VFS_ROOT(mount_t, vnode_t *, vfs_context_t);
extern int VFS_QUOTACTL(mount_t, int, uid_t, caddr_t, vfs_context_t);
extern int VFS_GETATTR(mount_t, struct vfs_attr *, vfs_context_t);
extern int VFS_SETATTR(mount_t, struct vfs_attr *, vfs_context_t);
extern int VFS_SYNC(mount_t, int, vfs_context_t);
extern int VFS_VGET(mount_t, ino64_t, vnode_t *, vfs_context_t);
extern int VFS_FHTOVP(mount_t, int, unsigned char *, vnode_t *, vfs_context_t);
extern int VFS_VPTOFH(vnode_t, int *, unsigned char *, vfs_context_t);

/* The file system registrartion KPI */
int vfs_fsadd(struct vfs_fsentry *, vfstable_t *);
int vfs_fsremove(vfstable_t);
int	vfs_iterate(int, int (*)(struct mount *, void *), void *);

uint64_t vfs_flags(mount_t);
void	vfs_setflags(mount_t, uint64_t);
void	vfs_clearflags(mount_t, uint64_t);

int	vfs_issynchronous(mount_t);
int	vfs_iswriteupgrade(mount_t);
int	vfs_isupdate(mount_t); 
int	vfs_isreload(mount_t);
int	vfs_isforce(mount_t);
int	vfs_isrdonly(mount_t);
int	vfs_isrdwr(mount_t);
int	vfs_authopaque(mount_t);
int	vfs_authopaqueaccess(mount_t);
void	vfs_setauthopaque(mount_t);
void	vfs_setauthopaqueaccess(mount_t);
void	vfs_clearauthopaque(mount_t);
void	vfs_clearauthopaqueaccess(mount_t);
int	vfs_extendedsecurity(mount_t);
void	vfs_setextendedsecurity(mount_t);
void	vfs_clearextendedsecurity(mount_t);
void	vfs_setlocklocal(mount_t);
int	vfs_authcache_ttl(mount_t);
void	vfs_setauthcache_ttl(mount_t, int);
void	vfs_clearauthcache_ttl(mount_t);
void    vfs_markdependency(mount_t);

/*
 * return value from vfs_cachedrights_ttl if
 * neither MNTK_AUTH_OPAQUE | MNTK_AUTH_CACHE_TTL
 * is set in mnt_kern_flag.. it indicates
 * that no TTL is being applied to the vnode rights cache
 */
#define CACHED_RIGHT_INFINITE_TTL	~0


uint32_t vfs_maxsymlen(mount_t);
void	vfs_setmaxsymlen(mount_t, uint32_t);
void *	vfs_fsprivate(mount_t);
void	vfs_setfsprivate(mount_t, void *mntdata);

struct vfsstatfs *	vfs_statfs(mount_t);
#define	VFS_USER_EVENT		0
#define	VFS_KERNEL_EVENT	1
int	vfs_update_vfsstat(mount_t, vfs_context_t, int eventtype);
int	vfs_getattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);
int	vfs_setattr(mount_t mp, struct vfs_attr *vfa, vfs_context_t ctx);

int	vfs_typenum(mount_t);
void	vfs_name(mount_t, char *);
int	vfs_devblocksize(mount_t);
void	vfs_ioattr(mount_t, struct vfsioattr *);
void	vfs_setioattr(mount_t, struct vfsioattr *);
int 	vfs_64bitready(mount_t);


#define LK_NOWAIT 1
int	vfs_busy(mount_t, int);
void	vfs_unbusy(mount_t);

void	vfs_getnewfsid(struct mount *);
mount_t	vfs_getvfs(fsid_t *);
mount_t	vfs_getvfs_by_mntonname(char *);
int	vfs_mountedon(struct vnode *);
int	vfs_unmountbyfsid(fsid_t *, int, vfs_context_t);

void	vfs_event_signal(fsid_t *, u_int32_t, intptr_t);
void	vfs_event_init(void);
__END_DECLS

#endif /* KERNEL */

#ifndef KERNEL

/*
 * Generic file handle
 */
#define	NFS_MAX_FH_SIZE		NFSV4_MAX_FH_SIZE
#define	NFSV4_MAX_FH_SIZE	128
#define	NFSV3_MAX_FH_SIZE	64
#define	NFSV2_MAX_FH_SIZE	32
struct fhandle {
	int		fh_len;				/* length of file handle */
	unsigned char	fh_data[NFS_MAX_FH_SIZE];	/* file handle value */
};
typedef struct fhandle	fhandle_t;


__BEGIN_DECLS
int	fhopen(const struct fhandle *, int);
int	fstatfs(int, struct statfs *) __DARWIN_INODE64(fstatfs);
int	fstatfs64(int, struct statfs64 *);
int	getfh(const char *, fhandle_t *);
int	getfsstat(struct statfs *, int, int) __DARWIN_INODE64(getfsstat);
int	getfsstat64(struct statfs64 *, int, int);
int	getmntinfo(struct statfs **, int) __DARWIN_INODE64(getmntinfo);
int	getmntinfo64(struct statfs64 **, int);
int	mount(const char *, const char *, int, void *);
int	statfs(const char *, struct statfs *) __DARWIN_INODE64(statfs);
int	statfs64(const char *, struct statfs64 *);
int	unmount(const char *, int);
int	getvfsbyname(const char *, struct vfsconf *);
__END_DECLS

#endif /* KERNEL */
#endif /* !_SYS_MOUNT_H_ */