230 lines
6.7 KiB
Groff
230 lines
6.7 KiB
Groff
.\" $NetBSD: vnconfig.8,v 1.37 2012/07/08 22:49:55 wiz Exp $
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.\"
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.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Jason R. Thorpe.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" Copyright (c) 1993 University of Utah.
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.\" Copyright (c) 1980, 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Systems Programming Group of the University of Utah Computer
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.\" Science Department.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)vnconfig.8 8.1 (Berkeley) 6/5/93
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.\"
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.Dd July 9, 2012
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.Dt VNCONFIG 8
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.Os
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.Sh NAME
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.Nm vnconfig
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.Nd configure vnode disks
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.Sh SYNOPSIS
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.Nm
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.Op Fl crvz
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.Op Fl f Ar disktab
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.Op Fl t Ar typename
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.Ar vnode_disk
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.Ar regular_file
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.Op Ar geomspec
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.Nm
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.Fl u
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.Op Fl Fv
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.Ar vnode_disk
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.Nm
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.Fl l
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.Op Ar vnode_disk
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.Sh DESCRIPTION
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The
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.Nm
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command configures vnode pseudo disk devices.
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It will associate the vnode disk
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.Ar vnode_disk
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with the regular file
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.Ar regular_file
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allowing the latter to be accessed as though it were a disk.
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Hence a regular file within the filesystem can be used for swapping
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or can contain a filesystem that is mounted in the name space.
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The
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.Ar vnode_disk
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is a special file of raw partition or name of vnode disk like
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.Pa vnd0 .
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.Pp
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Options indicate an action to be performed:
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.Bl -tag -width indent
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.It Fl c
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Configures the device.
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If successful, references to
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.Ar vnode_disk
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will access the contents of
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.Ar regular_file .
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.Pp
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If
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.Ar geomspec
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is specified, the vnode device will emulate the specified disk geometry.
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The format of the
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.Ar geomspec
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argument is:
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.Bd -ragged -offset indent
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.Sm off
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.Xo Ar secsize Li / Ar nsectors Li /
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.Ar ntracks Li / Ar ncylinders Xc
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.Sm on
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.Ed
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.Pp
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If geometry is not specified, the kernel will choose a default based on 1MB
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cylinders.
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.Ar secsize
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is the number of bytes per sector.
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It must be an even multiple of 512.
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.Ar nsectors
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is the number of sectors per track.
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.Ar ntracks
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is the number of tracks per cylinder.
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.Ar ncylinders
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is the number of cylinders in the device.
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.It Fl F
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Force unconfiguration if the device is in use.
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Does not imply
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.Fl u .
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.It Fl f Ar disktab
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Specifies that the
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.Fl t
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option should look up in
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.Ar disktab
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instead of in
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.Pa /etc/disktab .
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.It Fl l
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List the vnd devices and indicate which ones are in use.
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If a specific
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.Ar vnode_disk
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is given, then only that will be described.
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.It Fl t Ar typename
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If configuring the device, look up
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.Ar typename
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in
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.Pa /etc/disktab
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and use the geometry specified in the entry.
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This option and the
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.Ar geomspec
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argument are mutually exclusive.
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.It Fl r
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Configure the device as read-only.
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.It Fl u
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Unconfigures the device.
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.It Fl v
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Print messages to stdout describing actions taken.
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.It Fl z
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Assume that
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.Ar regular_file
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is a compressed disk image in cloop2 format, and configure it
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read-only.
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See the
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.Xr vndcompress 1
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manpage on how to create such an image.
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.El
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.Pp
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If no action option is given,
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.Fl c
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is assumed.
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.Sh FILES
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.Bl -tag -width /etc/disktab -compact
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.It Pa /dev/rvnd??
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.It Pa /dev/vnd??
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.It Pa /etc/disktab
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.El
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.Sh EXAMPLES
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.Dl vnconfig vnd0 /tmp/diskimage
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or
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.Dl vnconfig /dev/rvnd0c /tmp/diskimage
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.Pp
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Configures the vnode disk
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.Pa vnd0 .
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Please note that use of the second form of the command is discouraged because
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it requires knowledge of the raw partition which varies between architectures.
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.Pp
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.Dl vnconfig vnd0 /tmp/floppy.img 512/18/2/80
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.Pp
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Configures the vnode disk
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.Pa vnd0
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emulating the geometry of 512 bytes per sector, 18 sectors per track,
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2 tracks per cylinder, and 80 cylinders total.
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.Pp
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.Dl vnconfig -t floppy vnd0 /tmp/floppy.img
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.Pp
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Configures the vnode disk
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.Pa vnd0
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using the geometry specified in the
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.Pa floppy
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entry in
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.Pa /etc/disktab .
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.Pp
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.Dl vnconfig -u vnd0
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.Pp
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Unconfigures the
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.Pa vnd0
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device.
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.Sh SEE ALSO
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.Xr vndcompress 1 ,
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.Xr opendisk 3 ,
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.Xr vnd 4 ,
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.Xr mount 8 ,
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.Xr swapctl 8 ,
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.Xr umount 8
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Nx 1.0 .
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.Sh BUGS
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This command should really be named
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.Nm vndconfig .
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