1.\" Copyright (c) 1996 Doug Rabson 2.\" 3.\" All rights reserved. 4.\" 5.\" This program is free software. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man9/VFS_MOUNT.9,v 1.7.2.1 2001/12/17 11:30:18 ru Exp $ 28.\" $DragonFly: src/share/man/man9/VFS_MOUNT.9,v 1.3 2004/06/01 11:36:53 hmp Exp $ 29.\" 30.Dd July 24, 1996 31.Os 32.Dt VFS_MOUNT 9 33.Sh NAME 34.Nm VFS_MOUNT 35.Nd mount a filesystem 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/mount.h 39.In sys/vnode.h 40.Ft int 41.Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct proc *p" 42.Sh DESCRIPTION 43Mount a filesystem into the system's namespace. 44.Pp 45Its arguments are: 46.Bl -tag -width data 47.It Ar mp 48Structure representing the filesystem. 49.It Ar path 50Pathname where the filesystem is being mounted. 51.It Ar data 52Filesystem specific data. This should be read into the kernel using 53.Xr copyin 9 . 54.It Ar ndp 55Contains the result of a 56.Xr namei 9 57call on the pathname of the mountpoint. 58.It Ar p 59Process which is mounting the filesystem. 60.El 61.Pp 62This is called both to mount new filesystems and to change the 63attributes of an existing filesystem. If the 64.Dv MNT_UPDATE 65flag is set in 66.Fa mp->mnt_flag 67then the filesystem should update its internal state from the value of 68.Fa mp->mnt_flag . 69This can be used, for instance, to convert a read-only filesystem to 70read-write. 71It is also used by 72.Xr mountd 8 73to update the NFS export information for the filesystem. 74.Pp 75If the 76.Dv MNT_UPDATE 77flag is not specified, then this is a newly mounted filesystem. The 78filesystem code should allocate and initialize 79any private data needed to represent 80the filesystem (it can use the 81.Fa mp->mnt_data 82field to store this information). 83.Sh SEE ALSO 84.Xr VFS 9 , 85.Xr vnode 9 86.Sh AUTHORS 87This man page was written by 88.An Doug Rabson . 89