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.Dd May 23, 2009 30.Dt VFS_MOUNT 9 31.Os 32.Sh NAME 33.Nm VFS_MOUNT 34.Nd mount a file system 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/mount.h 38.In sys/vnode.h 39.Ft int 40.Fn VFS_MOUNT "struct mount *mp" 41.Sh DESCRIPTION 42The 43.Fn VFS_MOUNT 44macro mounts a file system into the system's namespace or updates the 45attributes of an already mounted file system. 46.Pp 47The arguments it expects are: 48.Bl -tag -width data 49.It Fa mp 50Structure representing the file system. 51.El 52.Pp 53The 54.Fn VFS_MOUNT 55macro is called both to mount new file systems and to change the 56attributes of an existing file system. 57If the 58.Dv MNT_UPDATE 59flag is set in 60.Fa mp->mnt_flag 61then the file system should update its internal state from the value of 62.Fa mp->mnt_flag . 63This can be used, for instance, to convert a read-only file system to 64read-write. 65It is also used by 66.Xr mountd 8 67to update the NFS export information for the file system. 68.Pp 69If the 70.Dv MNT_UPDATE 71flag is not specified, then this is a newly mounted file system. 72The file system code should allocate and initialize 73any private data needed to represent 74the file system (it can use the 75.Fa mp->mnt_data 76field to store this information). 77.Sh SEE ALSO 78.Xr VFS 9 , 79.Xr vnode 9 80.Sh AUTHORS 81This manual page was written by 82.An Doug Rabson . 83