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.\" $DragonFly: src/share/man/man9/VFS_MOUNT.9,v 1.2 2003/06/17 04:37:01 dillon Exp $ 31.\" 32.Dd July 24, 1996 33.Os 34.Dt VFS_MOUNT 9 35.Sh NAME 36.Nm VFS_MOUNT 37.Nd mount a filesystem 38.Sh SYNOPSIS 39.In sys/param.h 40.In sys/mount.h 41.In sys/vnode.h 42.Ft int 43.Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct proc *p" 44.Sh DESCRIPTION 45Mount a filesystem into the system's namespace. 46.Pp 47Its arguments are: 48.Bl -tag -width data 49.It Ar mp 50Structure representing the filesystem. 51.It Ar path 52Pathname where the filesystem is being mounted. 53.It Ar data 54Filesystem specific data. This should be read into the kernel using 55.Xr copyin 9 . 56.It Ar ndp 57Contains the result of a 58.Xr namei 9 59call on the pathname of the mountpoint. 60.It Ar p 61Process which is mounting the filesystem. 62.El 63.Pp 64This is called both to mount new filesystems and to change the 65attributes of an existing filesystem. If the 66.Dv MNT_UPDATE 67flag is set in 68.Fa mp->mnt_flag 69then the filesystem should update its internal state from the value of 70.Fa mp->mnt_flag . 71This can be used, for instance, to convert a read-only filesystem to 72read-write. 73It is also used by 74.Xr mountd 8 75to update the NFS export information for the filesystem. 76.Pp 77If the 78.Dv MNT_UPDATE 79flag is not specified, then this is a newly mounted filesystem. The 80filesystem code should allocate and initialize 81any private data needed to represent 82the filesystem (it can use the 83.Fa mp->mnt_data 84field to store this information). 85.Sh SEE ALSO 86.Xr VFS 9 , 87.Xr vnode 9 88.Sh AUTHORS 89This man page was written by 90.An Doug Rabson . 91