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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This 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 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_
-
- #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
- };
-
- /*
- * 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 */
- };
-
- /*
- * 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 */
-
- /*
- * 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_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 */
- };
-
- /*
- * 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 */
- };
-
- #ifdef KERNEL
-
- 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 *));
- int vfs_mountroot __P((void));
- int vfs_rootmountalloc __P((char *, char *, struct mount **));
- void vfs_unbusy __P((struct mount *, struct proc *));
- void vfs_unmountall __P((void));
- extern CIRCLEQ_HEAD(mntlist, mount) mountlist;
- extern struct slock mountlist_slock;
-
- #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));
- __END_DECLS
-
- #endif /* KERNEL */
- #endif /* !_SYS_MOUNT_H_ */
-