1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1996 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD: src/share/man/man9/VFS_MOUNT.9,v 1.7.2.1 2001/12/17 11:30:18 ru Exp $ 30.\" 31.Dd July 24, 1996 32.Os 33.Dt VFS_MOUNT 9 34.Sh NAME 35.Nm VFS_MOUNT 36.Nd mount a filesystem 37.Sh SYNOPSIS 38.In sys/param.h 39.In sys/mount.h 40.In sys/vnode.h 41.Ft int 42.Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct proc *p" 43.Sh DESCRIPTION 44Mount a filesystem into the system's namespace. 45.Pp 46Its arguments are: 47.Bl -tag -width data 48.It Ar mp 49Structure representing the filesystem. 50.It Ar path 51Pathname where the filesystem is being mounted. 52.It Ar data 53Filesystem specific data. This should be read into the kernel using 54.Xr copyin 9 . 55.It Ar ndp 56Contains the result of a 57.Xr namei 9 58call on the pathname of the mountpoint. 59.It Ar p 60Process which is mounting the filesystem. 61.El 62.Pp 63This is called both to mount new filesystems and to change the 64attributes of an existing filesystem. If the 65.Dv MNT_UPDATE 66flag is set in 67.Fa mp->mnt_flag 68then the filesystem should update its internal state from the value of 69.Fa mp->mnt_flag . 70This can be used, for instance, to convert a read-only filesystem to 71read-write. 72It is also used by 73.Xr mountd 8 74to update the NFS export information for the filesystem. 75.Pp 76If the 77.Dv MNT_UPDATE 78flag is not specified, then this is a newly mounted filesystem. The 79filesystem code should allocate and initialize 80any private data needed to represent 81the filesystem (it can use the 82.Fa mp->mnt_data 83field to store this information). 84.Sh SEE ALSO 85.Xr VFS 9 , 86.Xr vnode 9 87.Sh AUTHORS 88This man page was written by 89.An Doug Rabson . 90