1997-02-13 18:29:30 +00:00
|
|
|
.\" $NetBSD: vnd.4,v 1.1 1995/12/30 18:10:48 thorpej Exp $
|
|
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 1995 Jason R. Thorpe.
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
|
|
|
.\" must display the following acknowledgement:
|
|
|
|
|
.\" This product includes software developed for the NetBSD Project
|
|
|
|
|
.\" by Jason R. Thorpe.
|
|
|
|
|
.\" 4. Neither the name of the author nor the names of its contributors
|
|
|
|
|
.\" may be used to endorse or promote products derived from this software
|
|
|
|
|
.\" without specific prior written permission.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
|
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
|
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
|
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
|
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
|
|
|
.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
|
|
|
.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
|
|
|
.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
|
|
|
.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
.\" SUCH DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.Dd December 30, 1995
|
|
|
|
|
.Dt VN 4
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm vn
|
|
|
|
|
.Nd vnode disk driver
|
|
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.Cd "pseudo-device vn" Op Ar count
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Nm
|
|
|
|
|
driver provides a disk-like interface to a file. This is useful for
|
|
|
|
|
a variety of applications, including swap files and building mini-root
|
|
|
|
|
or floppy disk images.
|
|
|
|
|
.Pp
|
|
|
|
|
This document assumes that you're familiar with how to generate kernels,
|
|
|
|
|
how to properly configure disks and pseudo-devices in a kernel
|
|
|
|
|
configuration file.
|
|
|
|
|
.Pp
|
|
|
|
|
In order to compile in support for the
|
|
|
|
|
.Nm vn ,
|
|
|
|
|
you must add a line similar
|
|
|
|
|
to the following to your kernel configuration file:
|
|
|
|
|
.Bd -unfilled -offset indent
|
|
|
|
|
pseudo-device vn 4 #Vnode driver
|
|
|
|
|
.Ed
|
|
|
|
|
.Pp
|
|
|
|
|
The
|
|
|
|
|
.Ar count
|
|
|
|
|
argument is how many
|
|
|
|
|
.Nm vn Ns 's
|
|
|
|
|
memory is allocated for a boot time. In this example, no more than 4
|
|
|
|
|
.Nm vn Ns 's
|
|
|
|
|
may be configured.
|
|
|
|
|
.Pp
|
|
|
|
|
There is a run-time utility that is used for configuring
|
|
|
|
|
.Nm vn Ns 's .
|
|
|
|
|
See
|
|
|
|
|
.Xr vnconfig 8
|
|
|
|
|
for more information.
|
|
|
|
|
.Sh BUGS
|
|
|
|
|
The
|
|
|
|
|
.Nm
|
|
|
|
|
driver does not work if the file does not reside in a local filesystem.
|
|
|
|
|
.Sh FILES
|
|
|
|
|
/dev/{,r}vn* - vn device special files.
|
|
|
|
|
.Pp
|
|
|
|
|
.Sh HISTORY
|
|
|
|
|
The vnode disk driver was originally written at the University of
|
|
|
|
|
Utah.
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr config 8 ,
|
|
|
|
|
.Xr fsck 8 ,
|
1997-09-29 10:11:02 +00:00
|
|
|
.Xr MAKEDEV 8 ,
|
1997-02-13 18:29:30 +00:00
|
|
|
.Xr mount 8 ,
|
|
|
|
|
.Xr newfs 8 ,
|
|
|
|
|
.Xr vnconfig 8 .
|
