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 July 24, 1996 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" "char *path" "caddr_t data" "struct nameidata *ndp" "struct thread *td" 43.Sh DESCRIPTION 44Mount a file system into the system's namespace. 45.Pp 46Its arguments are: 47.Bl -tag -width data 48.It Fa mp 49Structure representing the file system. 50.It Fa path 51Pathname where the file system is being mounted. 52.It Fa data 53File system specific data. 54This should be read into the kernel using 55.Xr copyin 9 . 56.It Fa ndp 57Contains the result of a 58.Xr namei 9 59call on the pathname of the mountpoint. 60.It Fa td 61Thread which is mounting the file system. 62.El 63.Pp 64This is called both to mount new file systems and to change the 65attributes of an existing file system. 66If the 67.Dv MNT_UPDATE 68flag is set in 69.Fa mp->mnt_flag 70then the file system should update its internal state from the value of 71.Fa mp->mnt_flag . 72This can be used, for instance, to convert a read-only file system to 73read-write. 74It is also used by 75.Xr mountd 8 76to update the NFS export information for the file system. 77.Pp 78If the 79.Dv MNT_UPDATE 80flag is not specified, then this is a newly mounted file system. 81The file system code should allocate and initialize 82any private data needed to represent 83the file system (it can use the 84.Fa mp->mnt_data 85field to store this information). 86.Sh SEE ALSO 87.Xr VFS 9 , 88.Xr vnode 9 89.Sh AUTHORS 90This manual page was written by 91.An Doug Rabson . 92