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

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_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
 */

#ifndef _SYS_MOUNT_H_
#define	_SYS_MOUNT_H_

#include <sys/appleapiopts.h>
#ifndef KERNEL
#include <sys/ucred.h>
#endif
#include <sys/queue.h>
#include <sys/lock.h>
#include <net/radix.h>
#include <sys/socket.h>		/* XXX for AF_MAX */

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

/*
 * File identifier.
 * These are unique per filesystem on a single machine.
 */
#define	MAXFIDSZ	16

struct fid {
	u_short		fid_len;		/* length of data in bytes */
	u_short		fid_reserved;		/* force longword alignment */
	char		fid_data[MAXFIDSZ];	/* data (variable length) */
};

/*
 * file system statistics
 */

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

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
};

#ifdef __APPLE_API_PRIVATE
/*
 * Structure per mounted file system.  Each mounted file system has an
 * array of operations and an instance record.  The file systems are
 * put on a doubly linked list.
 */
LIST_HEAD(vnodelst, vnode);

struct mount {
	CIRCLEQ_ENTRY(mount) mnt_list;		/* mount list */
	struct vfsops	*mnt_op;		/* operations on fs */
	struct vfsconf	*mnt_vfc;		/* configuration info */
	struct vnode	*mnt_vnodecovered;	/* vnode we mounted on */
	struct vnodelst	mnt_vnodelist;		/* list of vnodes this mount */
	struct lock__bsd__ mnt_lock;		/* mount structure lock */
	int		mnt_flag;		/* flags */
	int		mnt_kern_flag;		/* kernel only flags */
	int		mnt_maxsymlinklen;	/* max size of short symlink */
	struct statfs	mnt_stat;		/* cache of filesystem stats */
	qaddr_t		mnt_data;		/* private data */
	/* Cached values of the IO constraints for the device */
	u_int32_t	mnt_maxreadcnt;	/* Max. byte count for read */
	u_int32_t	mnt_maxwritecnt;	/* Max. byte count for write */
	u_int16_t	mnt_segreadcnt;	/* Max. segment count for read */
	u_int16_t	mnt_segwritecnt;	/* Max. segment count for write */
};
#endif /* __APPLE_API_PRIVATE */

/*
 * 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 */
#define MNT_DONTBROWSE	0x00100000	/* file system is not appropriate path to user data */
#define MNT_UNKNOWNPERMISSIONS 0x00200000 /* no known mapping for uid/gid in permissions information on disk */
#define MNT_AUTOMOUNTED 0x00400000	/* filesystem was mounted by automounter */
#define MNT_JOURNALED   0x00800000  /* filesystem is journaled */

/*
 * NFS export related mount flags.
 */
#define	MNT_EXRDONLY	0x00000080	/* exported read only */
#define	MNT_EXPORTED	0x00000100	/* file system is exported */
#define	MNT_DEFEXPORTED	0x00000200	/* exported to the world */
#define	MNT_EXPORTANON	0x00000400	/* use anon uid mapping for everyone */
#define	MNT_EXKERB	0x00000800	/* exported with Kerberos uid mapping */

/*
 * 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 */
#define MNT_FIXEDSCRIPTENCODING	0x10000000	/* FS supports only fixed script encoding [HFS] */

/*
 * 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_EXRDONLY	| MNT_EXPORTED	| \
			MNT_DEFEXPORTED	| MNT_EXPORTANON| MNT_EXKERB	| \
			MNT_LOCAL	|		MNT_QUOTA	| \
			MNT_ROOTFS	| MNT_DOVOLFS	| MNT_DONTBROWSE | \
			MNT_UNKNOWNPERMISSIONS | MNT_AUTOMOUNTED | MNT_JOURNALED | MNT_FIXEDSCRIPTENCODING )
/*
 * 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_DELEXPORT	0x00020000	/* delete export host lists */
#define	MNT_RELOAD	0x00040000	/* reload filesystem data */
#define	MNT_FORCE	0x00080000	/* force unmount or readonly change */
#define MNT_CMDFLAGS	(MNT_UPDATE|MNT_DELEXPORT|MNT_RELOAD|MNT_FORCE)

/*
 * Internal filesystem control flags stored in mnt_kern_flag.
 *
 * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
 * past the mount point.  This keeps the subtree stable during mounts
 * and unmounts.
 */
#define MNTK_UNMOUNT	0x01000000	/* unmount in progress */
#define	MNTK_MWAIT	0x02000000	/* waiting for unmount to finish */
#define MNTK_WANTRDWR	0x04000000	/* upgrade to read/write requested */
#if REV_ENDIAN_FS
#define MNT_REVEND	0x08000000	/* Reverse endian FS */
#endif /* REV_ENDIAN_FS */
/*
 * 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 */
/*
 * 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 */

/*
 * Generic file handle
 */
struct fhandle {
	fsid_t	fh_fsid;	/* File system id of mount point */
	struct	fid fh_fid;	/* File sys specific id */
};
typedef struct fhandle	fhandle_t;

/*
 * Export arguments for local filesystem mount calls.
 */
struct export_args {
	int	ex_flags;		/* export related flags */
	uid_t	ex_root;		/* mapping for root uid */
	struct	ucred ex_anon;		/* mapping for anonymous user */
	struct	sockaddr *ex_addr;	/* net address to which exported */
	int	ex_addrlen;		/* and the net address length */
	struct	sockaddr *ex_mask;	/* mask of valid bits in saddr */
	int	ex_masklen;		/* and the smask length */
};

#ifdef __APPLE_API_UNSTABLE
/*
 * Filesystem configuration information. One of these exists for each
 * type of filesystem supported by the kernel. These are searched at
 * mount time to identify the requested filesystem.
 */
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)(void);	/* if != NULL, routine to mount root */
	struct	vfsconf *vfc_next;	/* next in list */
};

#endif /*__APPLE_API_UNSTABLE */

#ifdef KERNEL
#ifdef __APPLE_API_UNSTABLE
extern int maxvfsconf;		/* highest defined filesystem type */
extern struct vfsconf *vfsconf;	/* head of list of filesystem types */
extern int maxvfsslots;		/* Maximum slots available to be used */
extern int numused_vfsslots;	/* number of slots already used */

int	vfsconf_add __P((struct	vfsconf *));
int	vfsconf_del __P((char *));

/*
 * Operations supported on mounted file system.
 */
#ifdef __STDC__
struct nameidata;
struct mbuf;
#endif

struct vfsops {
	int	(*vfs_mount)	__P((struct mount *mp, char *path, caddr_t data,
				    struct nameidata *ndp, struct proc *p));
	int	(*vfs_start)	__P((struct mount *mp, int flags,
				    struct proc *p));
	int	(*vfs_unmount)	__P((struct mount *mp, int mntflags,
				    struct proc *p));
	int	(*vfs_root)	__P((struct mount *mp, struct vnode **vpp));
	int	(*vfs_quotactl)	__P((struct mount *mp, int cmds, uid_t uid,
				    caddr_t arg, struct proc *p));
	int	(*vfs_statfs)	__P((struct mount *mp, struct statfs *sbp,
				    struct proc *p));
	int	(*vfs_sync)	__P((struct mount *mp, int waitfor,
				    struct ucred *cred, struct proc *p));
	int	(*vfs_vget)	__P((struct mount *mp, void *ino,
				    struct vnode **vpp));
	int	(*vfs_fhtovp)	__P((struct mount *mp, struct fid *fhp,
				    struct mbuf *nam, struct vnode **vpp,
				    int *exflagsp, struct ucred **credanonp));
	int	(*vfs_vptofh)	__P((struct vnode *vp, struct fid *fhp));
	int	(*vfs_init)	__P((struct vfsconf *));
	int	(*vfs_sysctl)	__P((int *, u_int, void *, size_t *, void *,
				    size_t, struct proc *));
};

#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
	(*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
#define VFS_START(MP, FLAGS, P)	  (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
#define VFS_ROOT(MP, VPP)	  (*(MP)->mnt_op->vfs_root)(MP, VPP)
#define VFS_QUOTACTL(MP,C,U,A,P)  (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
#define VFS_STATFS(MP, SBP, P)	  (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
#define VFS_SYNC(MP, WAIT, C, P)  (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P)
#define VFS_VGET(MP, INO, VPP)	  (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
#define VFS_FHTOVP(MP, FIDP, NAM, VPP, EXFLG, CRED) \
	(*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, NAM, VPP, EXFLG, CRED)
#define	VFS_VPTOFH(VP, FIDP)	  (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)

/*
 * Network address lookup element
 */
struct netcred {
	struct	radix_node netc_rnodes[2];
	int	netc_exflags;
	struct	ucred netc_anon;
};

/*
 * Network export information
 */
struct netexport {
	struct	netcred ne_defexported;		      /* Default export */
	struct	radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */
};

/*
 * exported vnode operations
 */
int	vfs_busy __P((struct mount *, int, struct slock *, struct proc *));
int	vfs_export __P((struct mount *, struct netexport *,
	    struct export_args *));
struct	netcred *vfs_export_lookup __P((struct mount *, struct netexport *,
	    struct mbuf *));
void	vfs_getnewfsid __P((struct mount *));
struct	mount *vfs_getvfs __P((fsid_t *));
int	vfs_mountedon __P((struct vnode *));
void	vfs_unbusy __P((struct mount *, struct proc *));
#ifdef __APPLE_API_PRIVATE
int	vfs_mountroot __P((void));
int	vfs_rootmountalloc __P((char *, char *, struct mount **));
void	vfs_unmountall __P((void));
#endif /* __APPLE_API_PRIVATE */
extern	CIRCLEQ_HEAD(mntlist, mount) mountlist;
extern	struct slock mountlist_slock;

#endif /* __APPLE_API_UNSTABLE */
#else /* !KERNEL */

#include <sys/cdefs.h>

__BEGIN_DECLS
int	fstatfs __P((int, struct statfs *));
int	getfh __P((const char *, fhandle_t *));
int	getfsstat __P((struct statfs *, long, int));
int	getmntinfo __P((struct statfs **, int));
int	mount __P((const char *, const char *, int, void *));
int	statfs __P((const char *, struct statfs *));
int	unmount __P((const char *, int));
int	getvfsbyname __P((const char *, struct vfsconf *));
__END_DECLS

#endif /* KERNEL */
#endif /* !_SYS_MOUNT_H_ */
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
d7e50217	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
d7e50217 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
d7e50217 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	26	/*
	27	* Copyright (c) 1989, 1991, 1993
	28	* The Regents of the University of California. All rights reserved.
	29	*
	30	* Redistribution and use in source and binary forms, with or without
	31	* modification, are permitted provided that the following conditions
	32	* are met:
	33	* 1. Redistributions of source code must retain the above copyright
	34	* notice, this list of conditions and the following disclaimer.
	35	* 2. Redistributions in binary form must reproduce the above copyright
	36	* notice, this list of conditions and the following disclaimer in the
	37	* documentation and/or other materials provided with the distribution.
	38	* 3. All advertising materials mentioning features or use of this software
	39	* must display the following acknowledgement:
	40	* This product includes software developed by the University of
	41	* California, Berkeley and its contributors.
	42	* 4. Neither the name of the University nor the names of its contributors
	43	* may be used to endorse or promote products derived from this software
	44	* without specific prior written permission.
	45	*
	46	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	47	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	48	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	49	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	50	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	51	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	52	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	53	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	54	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	55	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	56	* SUCH DAMAGE.
	57	*
	58	* @(#)mount.h 8.21 (Berkeley) 5/20/95
	59	*/
	60
	61	#ifndef _SYS_MOUNT_H_
	62	#define _SYS_MOUNT_H_
	63
9bccf70c	64	#include <sys/appleapiopts.h>
1c79356b A	65	#ifndef KERNEL
	66	#include <sys/ucred.h>
	67	#endif
	68	#include <sys/queue.h>
	69	#include <sys/lock.h>
	70	#include <net/radix.h>
	71	#include <sys/socket.h> /* XXX for AF_MAX */
	72
	73	typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */
	74
	75	/*
	76	* File identifier.
	77	* These are unique per filesystem on a single machine.
	78	*/
	79	#define MAXFIDSZ 16
	80
	81	struct fid {
	82	u_short fid_len; /* length of data in bytes */
	83	u_short fid_reserved; /* force longword alignment */
	84	char fid_data[MAXFIDSZ]; /* data (variable length) */
	85	};
	86
	87	/*
	88	* file system statistics
	89	*/
	90
	91	#define MFSNAMELEN 15 /* length of fs type name, not inc. null */
	92	#define MNAMELEN 90 /* length of buffer for returned name */
	93
	94	struct statfs {
	95	short f_otype; /* TEMPORARY SHADOW COPY OF f_type */
	96	short f_oflags; /* TEMPORARY SHADOW COPY OF f_flags */
	97	long f_bsize; /* fundamental file system block size */
	98	long f_iosize; /* optimal transfer block size */
	99	long f_blocks; /* total data blocks in file system */
	100	long f_bfree; /* free blocks in fs */
	101	long f_bavail; /* free blocks avail to non-superuser */
	102	long f_files; /* total file nodes in file system */
	103	long f_ffree; /* free file nodes in fs */
	104	fsid_t f_fsid; /* file system id */
	105	uid_t f_owner; /* user that mounted the filesystem */
	106	short f_reserved1; /* spare for later */
	107	short f_type; /* type of filesystem */
	108	long f_flags; /* copy of mount exported flags */
	109	long f_reserved2[2]; /* reserved for future use */
	110	char f_fstypename[MFSNAMELEN]; /* fs type name */
	111	char f_mntonname[MNAMELEN]; /* directory on which mounted */
	112	char f_mntfromname[MNAMELEN];/* mounted filesystem */
	113	#if COMPAT_GETFSSTAT
	114	char f_reserved3[0]; /* For alignment */
	115	long f_reserved4[0]; /* For future use */
	116	#else
	117	char f_reserved3; /* For alignment */
	118	long f_reserved4[4]; /* For future use */
	119	#endif
	120	};
	121
9bccf70c	122	#ifdef __APPLE_API_PRIVATE
1c79356b A	123	/*
	124	* Structure per mounted file system. Each mounted file system has an
	125	* array of operations and an instance record. The file systems are
	126	* put on a doubly linked list.
	127	*/
	128	LIST_HEAD(vnodelst, vnode);
	129
	130	struct mount {
	131	CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */
	132	struct vfsops mnt_op; / operations on fs */
	133	struct vfsconf mnt_vfc; / configuration info */
	134	struct vnode mnt_vnodecovered; / vnode we mounted on */
	135	struct vnodelst mnt_vnodelist; /* list of vnodes this mount */
	136	struct lock__bsd__ mnt_lock; /* mount structure lock */
	137	int mnt_flag; /* flags */
	138	int mnt_kern_flag; /* kernel only flags */
	139	int mnt_maxsymlinklen; /* max size of short symlink */
	140	struct statfs mnt_stat; /* cache of filesystem stats */
	141	qaddr_t mnt_data; /* private data */
0b4e3aa0 A	142	/* Cached values of the IO constraints for the device */
	143	u_int32_t mnt_maxreadcnt; /* Max. byte count for read */
	144	u_int32_t mnt_maxwritecnt; /* Max. byte count for write */
	145	u_int16_t mnt_segreadcnt; /* Max. segment count for read */
	146	u_int16_t mnt_segwritecnt; /* Max. segment count for write */
1c79356b	147	};
9bccf70c	148	#endif /* __APPLE_API_PRIVATE */
1c79356b A	149
	150	/*
	151	* User specifiable flags.
	152	*
	153	* Unmount uses MNT_FORCE flag.
	154	*/
	155	#define MNT_RDONLY 0x00000001 /* read only filesystem */
	156	#define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */
	157	#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */
	158	#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */
	159	#define MNT_NODEV 0x00000010 /* don't interpret special files */
	160	#define MNT_UNION 0x00000020 /* union with underlying filesystem */
	161	#define MNT_ASYNC 0x00000040 /* file system written asynchronously */
	162	#define MNT_DONTBROWSE 0x00100000 /* file system is not appropriate path to user data */
	163	#define MNT_UNKNOWNPERMISSIONS 0x00200000 /* no known mapping for uid/gid in permissions information on disk */
	164	#define MNT_AUTOMOUNTED 0x00400000 /* filesystem was mounted by automounter */
b4c24cb9	165	#define MNT_JOURNALED 0x00800000 /* filesystem is journaled */
1c79356b A	166
	167	/*
	168	* NFS export related mount flags.
	169	*/
	170	#define MNT_EXRDONLY 0x00000080 /* exported read only */
	171	#define MNT_EXPORTED 0x00000100 /* file system is exported */
	172	#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */
	173	#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */
	174	#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */
	175
	176	/*
	177	* Flags set by internal operations.
	178	*/
	179	#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
	180	#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
	181	#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */
	182	#define MNT_DOVOLFS 0x00008000 /* FS supports volfs */
	183	#define MNT_FIXEDSCRIPTENCODING 0x10000000 /* FS supports only fixed script encoding [HFS] */
	184
	185	/*
	186	* XXX I think that this could now become (~(MNT_CMDFLAGS))
	187	* but the 'mount' program may need changing to handle this.
	188	*/
	189	#define MNT_VISFLAGMASK (MNT_RDONLY \| MNT_SYNCHRONOUS \| MNT_NOEXEC \| \
	190	MNT_NOSUID \| MNT_NODEV \| MNT_UNION \| \
	191	MNT_ASYNC \| MNT_EXRDONLY \| MNT_EXPORTED \| \
	192	MNT_DEFEXPORTED \| MNT_EXPORTANON\| MNT_EXKERB \| \
	193	MNT_LOCAL \| MNT_QUOTA \| \
	194	MNT_ROOTFS \| MNT_DOVOLFS \| MNT_DONTBROWSE \| \
b4c24cb9	195	MNT_UNKNOWNPERMISSIONS \| MNT_AUTOMOUNTED \| MNT_JOURNALED \| MNT_FIXEDSCRIPTENCODING )
1c79356b A	196	/*
	197	* External filesystem command modifier flags.
	198	* Unmount can use the MNT_FORCE flag.
	199	* XXX These are not STATES and really should be somewhere else.
	200	* External filesystem control flags.
	201	*/
	202	#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
	203	#define MNT_DELEXPORT 0x00020000 /* delete export host lists */
	204	#define MNT_RELOAD 0x00040000 /* reload filesystem data */
	205	#define MNT_FORCE 0x00080000 /* force unmount or readonly change */
	206	#define MNT_CMDFLAGS (MNT_UPDATE\|MNT_DELEXPORT\|MNT_RELOAD\|MNT_FORCE)
	207
	208	/*
	209	* Internal filesystem control flags stored in mnt_kern_flag.
	210	*
	211	* MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed
	212	* past the mount point. This keeps the subtree stable during mounts
	213	* and unmounts.
	214	*/
	215	#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
	216	#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
	217	#define MNTK_WANTRDWR 0x04000000 /* upgrade to read/write requested */
	218	#if REV_ENDIAN_FS
	219	#define MNT_REVEND 0x08000000 /* Reverse endian FS */
	220	#endif /* REV_ENDIAN_FS */
	221	/*
	222	* Sysctl CTL_VFS definitions.
	223	*
	224	* Second level identifier specifies which filesystem. Second level
	225	* identifier VFS_GENERIC returns information about all filesystems.
	226	*/
	227	#define VFS_GENERIC 0 /* generic filesystem information */
	228	#define VFS_NUMMNTOPS 1 /* int: total num of vfs mount/unmount operations */
	229	/*
	230	* Third level identifiers for VFS_GENERIC are given below; third
	231	* level identifiers for specific filesystems are given in their
	232	* mount specific header files.
	233	*/
	234	#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */
	235	#define VFS_CONF 2 /* struct: vfsconf for filesystem given
	236	as next argument */
	237	/*
	238	* Flags for various system call interfaces.
	239	*
	240	* waitfor flags to vfs_sync() and getfsstat()
	241	*/
	242	#define MNT_WAIT 1 /* synchronously wait for I/O to complete */
	243	#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */
	244
	245	/*
	246	* Generic file handle
	247	*/
	248	struct fhandle {
	249	fsid_t fh_fsid; /* File system id of mount point */
	250	struct fid fh_fid; /* File sys specific id */
	251	};
	252	typedef struct fhandle fhandle_t;
	253
	254	/*
	255	* Export arguments for local filesystem mount calls.
	256	*/
	257	struct export_args {
	258	int ex_flags; /* export related flags */
	259	uid_t ex_root; /* mapping for root uid */
260	struct ucred ex_anon; /* mapping for anonymous user */
261	struct sockaddr ex_addr; / net address to which exported */
262	int ex_addrlen; /* and the net address length */
263	struct sockaddr ex_mask; / mask of valid bits in saddr */
264	int ex_masklen; /* and the smask length */
265	};
266
9bccf70c	267	#ifdef __APPLE_API_UNSTABLE
1c79356b A	268	/*
	269	* Filesystem configuration information. One of these exists for each
	270	* type of filesystem supported by the kernel. These are searched at
	271	* mount time to identify the requested filesystem.
	272	*/
	273	struct vfsconf {
	274	struct vfsops vfc_vfsops; / filesystem operations vector */
	275	char vfc_name[MFSNAMELEN]; /* filesystem type name */
	276	int vfc_typenum; /* historic filesystem type number */
	277	int vfc_refcount; /* number mounted of this type */
	278	int vfc_flags; /* permanent flags */
	279	int (vfc_mountroot)(void); / if != NULL, routine to mount root */
	280	struct vfsconf vfc_next; / next in list */
	281	};
	282
9bccf70c	283	#endif /__APPLE_API_UNSTABLE /
1c79356b	284
9bccf70c A	285	#ifdef KERNEL
9bccf70c A	286	#ifdef __APPLE_API_UNSTABLE
1c79356b A	287	extern int maxvfsconf; /* highest defined filesystem type */
	288	extern struct vfsconf vfsconf; / head of list of filesystem types */
	289	extern int maxvfsslots; /* Maximum slots available to be used */
	290	extern int numused_vfsslots; /* number of slots already used */
	291
	292	int vfsconf_add __P((struct vfsconf *));
	293	int vfsconf_del __P((char *));
	294
	295	/*
	296	* Operations supported on mounted file system.
	297	*/
	298	#ifdef __STDC__
	299	struct nameidata;
	300	struct mbuf;
	301	#endif
	302
	303	struct vfsops {
	304	int (vfs_mount) __P((struct mount mp, char *path, caddr_t data,
	305	struct nameidata ndp, struct proc p));
	306	int (vfs_start) __P((struct mount mp, int flags,
	307	struct proc *p));
	308	int (vfs_unmount) __P((struct mount mp, int mntflags,
	309	struct proc *p));
	310	int (vfs_root) __P((struct mount mp, struct vnode **vpp));
	311	int (vfs_quotactl) __P((struct mount mp, int cmds, uid_t uid,
	312	caddr_t arg, struct proc *p));
	313	int (vfs_statfs) __P((struct mount mp, struct statfs *sbp,
	314	struct proc *p));
	315	int (vfs_sync) __P((struct mount mp, int waitfor,
	316	struct ucred cred, struct proc p));
	317	int (vfs_vget) __P((struct mount mp, void *ino,
	318	struct vnode **vpp));
	319	int (vfs_fhtovp) __P((struct mount mp, struct fid *fhp,
	320	struct mbuf nam, struct vnode *vpp,
	321	int exflagsp, struct ucred *credanonp));
	322	int (vfs_vptofh) __P((struct vnode vp, struct fid *fhp));
	323	int (vfs_init) __P((struct vfsconf ));
	324	int (vfs_sysctl) __P((int , u_int, void , size_t , void *,
	325	size_t, struct proc *));
	326	};
	327
	328	#define VFS_MOUNT(MP, PATH, DATA, NDP, P) \
	329	(*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P)
	330	#define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P)
	331	#define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P)
	332	#define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP)
	333	#define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P)
	334	#define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P)
	335	#define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P)
	336	#define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP)
	337	#define VFS_FHTOVP(MP, FIDP, NAM, VPP, EXFLG, CRED) \
	338	(*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, NAM, VPP, EXFLG, CRED)
	339	#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
	340
	341	/*
	342	* Network address lookup element
	343	*/
	344	struct netcred {
	345	struct radix_node netc_rnodes[2];
	346	int netc_exflags;
	347	struct ucred netc_anon;
	348	};
	349
	350	/*
351	* Network export information
352	*/
353	struct netexport {
354	struct netcred ne_defexported; /* Default export */
355	struct radix_node_head ne_rtable[AF_MAX+1]; / Individual exports */
356	};
357
358	/*
359	* exported vnode operations
360	*/
361	int vfs_busy __P((struct mount , int, struct slock , struct proc *));
362	int vfs_export __P((struct mount , struct netexport ,
363	struct export_args *));
364	struct netcred vfs_export_lookup __P((struct mount , struct netexport *,
365	struct mbuf *));
366	void vfs_getnewfsid __P((struct mount *));
367	struct mount vfs_getvfs __P((fsid_t ));
368	int vfs_mountedon __P((struct vnode *));
9bccf70c A	369	void vfs_unbusy __P((struct mount , struct proc ));
9bccf70c A	370	#ifdef __APPLE_API_PRIVATE
1c79356b A	371	int vfs_mountroot __P((void));
1c79356b A	372	int vfs_rootmountalloc __P((char , char , struct mount **));
1c79356b	373	void vfs_unmountall __P((void));
9bccf70c	374	#endif /* __APPLE_API_PRIVATE */
1c79356b A	375	extern CIRCLEQ_HEAD(mntlist, mount) mountlist;
	376	extern struct slock mountlist_slock;
	377
9bccf70c	378	#endif /* __APPLE_API_UNSTABLE */
1c79356b A	379	#else /* !KERNEL */
	380
	381	#include <sys/cdefs.h>
	382
	383	__BEGIN_DECLS
	384	int fstatfs __P((int, struct statfs *));
	385	int getfh __P((const char , fhandle_t ));
	386	int getfsstat __P((struct statfs *, long, int));
	387	int getmntinfo __P((struct statfs **, int));
	388	int mount __P((const char , const char , int, void *));
	389	int statfs __P((const char , struct statfs ));
	390	int unmount __P((const char *, int));
9bccf70c	391	int getvfsbyname __P((const char , struct vfsconf ));
1c79356b A	392	__END_DECLS
	393
	394	#endif /* KERNEL */
	395	#endif /* !_SYS_MOUNT_H_ */