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.\" $FreeBSD$ 30.\" 31.Dd May 23, 2009 32.Dt VFS_MOUNT 9 33.Os 34.Sh NAME 35.Nm VFS_MOUNT 36.Nd mount a file system 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" 43.Sh DESCRIPTION 44The 45.Fn VFS_MOUNT 46macro mounts a file system into the system's namespace or updates the 47attributes of an already mounted file system. 48.Pp 49The arguments it expects are: 50.Bl -tag -width data 51.It Fa mp 52Structure representing the file system. 53.El 54.Pp 55The 56.Fn VFS_MOUNT 57macro is called both to mount new file systems and to change the 58attributes of an existing file system. 59If the 60.Dv MNT_UPDATE 61flag is set in 62.Fa mp->mnt_flag 63then the file system should update its internal state from the value of 64.Fa mp->mnt_flag . 65This can be used, for instance, to convert a read-only file system to 66read-write. 67It is also used by 68.Xr mountd 8 69to update the NFS export information for the file system. 70.Pp 71If the 72.Dv MNT_UPDATE 73flag is not specified, then this is a newly mounted file system. 74The file system code should allocate and initialize 75any private data needed to represent 76the file system (it can use the 77.Fa mp->mnt_data 78field to store this information). 79.Sh SEE ALSO 80.Xr VFS 9 , 81.Xr vnode 9 82.Sh AUTHORS 83This manual page was written by 84.An Doug Rabson . 85