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 January 7, 2005 32.Os 33.Dt VFS_MOUNT 9 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" "struct thread *td" 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.It Fa td 54Thread which is mounting the file system. 55.El 56.Pp 57The 58.Fn VFS_MOUNT 59macro is called both to mount new file systems and to change the 60attributes of an existing file system. 61If the 62.Dv MNT_UPDATE 63flag is set in 64.Fa mp->mnt_flag 65then the file system should update its internal state from the value of 66.Fa mp->mnt_flag . 67This can be used, for instance, to convert a read-only file system to 68read-write. 69It is also used by 70.Xr mountd 8 71to update the NFS export information for the file system. 72.Pp 73If the 74.Dv MNT_UPDATE 75flag is not specified, then this is a newly mounted file system. 76The file system code should allocate and initialize 77any private data needed to represent 78the file system (it can use the 79.Fa mp->mnt_data 80field to store this information). 81.Sh SEE ALSO 82.Xr VFS 9 , 83.Xr vnode 9 84.Sh AUTHORS 85This manual page was written by 86.An Doug Rabson . 87