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NetBSD/sys/sys/mount.h

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/*
* Copyright (c) 1989 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.
*
* from: @(#)mount.h 7.22 (Berkeley) 6/3/91
* $Id: mount.h,v 1.17 1993/09/07 15:41:55 ws Exp $
*/
#ifndef _SYS_MOUNT_H_
#define _SYS_MOUNT_H_
typedef quad 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 MNAMELEN 90 /* length of buffer for returned name */
struct statfs {
short f_type; /* type of filesystem (see below) */
short f_flags; /* copy of mount flags */
long f_fsize; /* fundamental file system block size */
long f_bsize; /* 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 */
long f_spare[9]; /* spare for later */
char f_mntonname[MNAMELEN]; /* directory on which mounted */
char f_mntfromname[MNAMELEN];/* mounted filesystem */
};
/*
* File system types.
*/
#define MOUNT_NONE 0
#define MOUNT_EXPORT MOUNT_NONE /* use this for export mounting (mountd) */
#define MOUNT_UFS 1 /* UNIX "Fast" Filesystem */
#define MOUNT_NFS 2 /* Network Filesystem */
#define MOUNT_MFS 3 /* Memory Filesystem */
#define MOUNT_MSDOS 4 /* MSDOS Filesystem */
#define MOUNT_ISOFS 5 /* iso9660 cdrom */
#define MOUNT_FDESC 6 /* /dev/fd filesystem */
#define MOUNT_KERNFS 7 /* kernel variable filesystem */
#define MOUNT_DEVFS 8 /* device node filesystem */
#define MOUNT_AFS 9 /* AFS 3.x */
#define MOUNT_PROCFS 10 /* proc filesystem */
#define MOUNT_MAXTYPE MOUNT_PROCFS
/*
* 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.
*/
struct mount {
struct mount *mnt_next; /* next in mount list */
struct mount *mnt_prev; /* prev in mount list */
struct vfsops *mnt_op; /* operations on fs */
struct vnode *mnt_vnodecovered; /* vnode we mounted on */
struct vnode *mnt_mounth; /* list of vnodes this mount */
int mnt_flag; /* flags */
uid_t mnt_exroot; /* exported mapping for uid 0 */
struct statfs mnt_stat; /* cache of filesystem stats */
qaddr_t mnt_data; /* private data */
};
/*
* Mount flags.
*/
#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 filesysem */
/*
* exported mount flags.
*/
#define MNT_EXPORTED 0x00000100 /* file system is exported */
#define MNT_EXRDONLY 0x00000200 /* exported read only */
/*
* Flags set by internal operations.
*/
#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */
#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */
/*
* Mask of flags that are visible to statfs()
*/
#define MNT_VISFLAGMASK 0x0000ffff
/*
* filesystem control flags.
*
* MNT_MLOCK lock the mount entry so that name lookup cannot proceed
* past the mount point. This keeps the subtree stable during mounts
* and unmounts.
*/
#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */
#define MNT_MLOCK 0x00100000 /* lock so that subtree is stable */
#define MNT_MWAIT 0x00200000 /* someone is waiting for lock */
#define MNT_MPBUSY 0x00400000 /* scan of mount point in progress */
#define MNT_MPWANT 0x00800000 /* waiting for mount point */
#define MNT_UNMOUNT 0x01000000 /* unmount in progress */
/*
* Operations supported on mounted file system.
*/
#ifdef KERNEL
#ifdef __STDC__
struct nameidata;
#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 uid, should be uid_t */
int (*vfs_quotactl) __P((struct mount *mp, int cmds, int 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));
int (*vfs_fhtovp) __P((struct mount *mp, struct fid *fhp,
struct vnode **vpp));
int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp));
int (*vfs_init) __P(());
};
#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, WAITFOR) (*(MP)->mnt_op->vfs_sync)(MP, WAITFOR)
#define VFS_FHTOVP(MP, FIDP, VPP) (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP)
#define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP)
#endif /* KERNEL */
/*
* Flags for various system call interfaces.
*
* forcibly flags for vfs_umount().
* waitfor flags to vfs_sync() and getfsstat()
*/
#define MNT_FORCE 1
#define MNT_NOFORCE 2
#define MNT_WAIT 1
#define MNT_NOWAIT 2
/*
* Generic file handle
*/
struct fhandle {
fsid_t fh_fsid; /* File system id of mount point */
struct fid fh_fid; /* Id of file */
};
typedef struct fhandle fhandle_t;
/*
* Arguments to export mount
*/
struct export_args {
uid_t exroot; /* mapping for root uid */
};
/*
* Arguments to mount UFS
*/
struct ufs_args {
char *fspec; /* block special device to mount */
};
/*
* Arguments to mount MFS
*/
struct mfs_args {
char *name; /* name to export for statfs */
caddr_t base; /* base address of file system in memory */
u_long size; /* size of file system */
};
/*
* File Handle (32 bytes for version 2), variable up to 1024 for version 3
*/
union nfsv2fh {
fhandle_t fh_generic;
u_char fh_bytes[32];
};
typedef union nfsv2fh nfsv2fh_t;
/*
* Arguments to mount NFS
*/
struct nfs_args {
struct sockaddr *addr; /* file server address */
int sotype; /* Socket type */
int proto; /* and Protocol */
nfsv2fh_t *fh; /* File handle to be mounted */
int flags; /* flags */
int wsize; /* write size in bytes */
int rsize; /* read size in bytes */
int timeo; /* initial timeout in .1 secs */
int retrans; /* times to retry send */
char *hostname; /* server's name */
};
/*
* NFS mount option flags
*/
#define NFSMNT_SOFT 0x0001 /* soft mount (hard is default) */
#define NFSMNT_WSIZE 0x0002 /* set write size */
#define NFSMNT_RSIZE 0x0004 /* set read size */
#define NFSMNT_TIMEO 0x0008 /* set initial timeout */
#define NFSMNT_RETRANS 0x0010 /* set number of request retrys */
#define NFSMNT_HOSTNAME 0x0020 /* set hostname for error printf */
#define NFSMNT_INT 0x0040 /* allow interrupts on hard mount */
#define NFSMNT_NOCONN 0x0080 /* Don't Connect the socket */
#define NFSMNT_SCKLOCK 0x0100 /* Lock socket against others */
#define NFSMNT_WANTSCK 0x0200 /* Want a socket lock */
#define NFSMNT_SPONGY 0x0400 /* spongy mount (soft for stat and lookup) */
#define NFSMNT_COMPRESS 0x0800 /* Compress nfs rpc xdr */
#define NFSMNT_LOCKBITS (NFSMNT_SCKLOCK | NFSMNT_WANTSCK)
/*
* Arguments to mount ISO 9660 filesystems.
*/
struct iso_args {
char *fspec; /* block special holding the fs to mount */
int flags; /* mounting flags, see below */
};
#define ISOFSMNT_NORRIP 0x00000001 /* disable Rock Ridge Ext.*/
#define ISOFSMNT_GENS 0x00000002 /* enable usage of generation numbers */
#define ISOFSMNT_EXTATT 0x00000004 /* enable usage of extended attributes */
/*
* Arguments to mount MSDOS filesystems.
*/
struct msdosfs_args {
char *fspec; /* blocks special holding the fs to mount */
};
#ifdef KERNEL
/*
* exported vnode operations
*/
void vfs_remove __P((struct mount *mp)); /* remove a vfs from mount list */
int vfs_lock __P((struct mount *mp)); /* lock a vfs */
void vfs_unlock __P((struct mount *mp)); /* unlock a vfs */
struct mount *getvfs __P((fsid_t *fsid)); /* return vfs given fsid */
struct mount *rootfs; /* ptr to root mount structure */
extern struct vfsops *vfssw[]; /* mount filesystem type table */
#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((int, 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_ */
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