1.\" $NetBSD: vnconfig.8,v 1.22 2002/03/05 15:11:54 wiz Exp $ 2.\" 3.\" Copyright (c) 1997 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Jason R. Thorpe. 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.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35.\" POSSIBILITY OF SUCH DAMAGE. 36.\" 37.\" Copyright (c) 1993 University of Utah. 38.\" Copyright (c) 1980, 1989, 1991, 1993 39.\" The Regents of the University of California. All rights reserved. 40.\" 41.\" This code is derived from software contributed to Berkeley by 42.\" the Systems Programming Group of the University of Utah Computer 43.\" Science Department. 44.\" 45.\" Redistribution and use in source and binary forms, with or without 46.\" modification, are permitted provided that the following conditions 47.\" are met: 48.\" 1. Redistributions of source code must retain the above copyright 49.\" notice, this list of conditions and the following disclaimer. 50.\" 2. Redistributions in binary form must reproduce the above copyright 51.\" notice, this list of conditions and the following disclaimer in the 52.\" documentation and/or other materials provided with the distribution. 53.\" 3. All advertising materials mentioning features or use of this software 54.\" must display the following acknowledgement: 55.\" This product includes software developed by the University of 56.\" California, Berkeley and its contributors. 57.\" 4. Neither the name of the University nor the names of its contributors 58.\" may be used to endorse or promote products derived from this software 59.\" without specific prior written permission. 60.\" 61.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71.\" SUCH DAMAGE. 72.\" 73.\" @(#)vnconfig.8 8.1 (Berkeley) 6/5/93 74.\" 75.Dd July 8, 1993 76.Dt VNCONFIG 8 77.Os 78.Sh NAME 79.Nm vnconfig 80.Nd configure vnode disks 81.Sh SYNOPSIS 82.Nm "" 83.Op Fl c 84.Op Fl f Ar disktab 85.Op Fl t Ar typename 86.Op Fl v 87.Ar vnode_disk 88.Ar regular_file 89.Op Ar geomspec 90.Nm "" 91.Fl u 92.Op Fl v 93.Ar vnode_disk 94.Sh DESCRIPTION 95The 96.Nm 97command configures vnode pseudo disk devices. 98It will associate the vnode disk 99.Ar vnode_disk 100with the regular file 101.Ar regular_file 102allowing the latter to be accessed as though it were a disk. 103Hence a regular file within the filesystem can be used for swapping 104or can contain a filesystem that is mounted in the name space. 105The 106.Ar vnode_disk 107is a special file of raw partition or name of vnode disk like 108.Pa vnd0 . 109.Pp 110Options indicate an action to be performed: 111.Bl -tag -width indent 112.It Fl c 113Configures the device. 114If successful, references to 115.Ar vnode_disk 116will access the contents of 117.Ar regular_file . 118.Pp 119If 120.Ar geomspec 121is specified, the vnode device will emulate the specified disk geometry. 122The format of the 123.Ar geomspec 124argument is: 125.Bd -ragged -offset indent 126.Sm off 127.Xo Ar secsize Li / Ar nsectors Li / 128.Ar ntracks Li / Ar ncylinders Xc 129.Sm on 130.Ed 131.Pp 132If geometry is not specified, the kernel will choose a default based on 1MB 133cylinders. 134.Ar secsize 135is the number of bytes per sector. It must be an even multiple of 512. 136.Ar nsectors 137is the number of sectors per track. 138.Ar ntracks 139is the number of tracks per cylinder. 140.Ar ncylinders 141is the number of cylinders in the device. 142.It Fl f Ar disktab 143Specifies that the 144.Fl t 145option should look up in 146.Ar disktab 147instead of in 148.Pa /etc/disktab . 149.It Fl t Ar typename 150If configuring the device, look up 151.Ar typename 152in 153.Pa /etc/disktab 154and use the geometry specified in the entry. This option and the 155.Ar geomspec 156argument are mutually exclusive. 157.It Fl u 158Unconfigures the device. 159.It Fl v 160Print messages to stdout describing actions taken. 161.El 162.Pp 163If no action option is given, 164.Fl c 165is assumed. 166.Sh FILES 167.Bl -tag -width /etc/disktab -compact 168.It Pa /dev/rvnd?? 169.It Pa /dev/vnd?? 170.It Pa /etc/disktab 171.El 172.Sh EXAMPLES 173.Dl vnconfig vnd0 /tmp/diskimage 174or 175.Dl vnconfig /dev/rvnd0c /tmp/diskimage 176.Pp 177Configures the vnode disk 178.Pa vnd0 . 179Please note that use of the second form of the command is discouraged because 180it requires knowledge of the raw partition which varies between architectures. 181.Pp 182.Dl vnconfig vnd0 /tmp/floppy.img 512/18/2/80 183.Pp 184Configures the vnode disk 185.Pa vnd0 186emulating the geometry of 512 bytes per sector, 18 sectors per track, 1872 tracks per cylinder, and 80 cylinders total. 188.Pp 189.Dl vnconfig -t floppy vnd0 /tmp/floppy.img 190.Pp 191Configures the vnode disk 192.Pa vnd0 193using the geometry specified in the 194.Pa floppy 195entry in 196.Pa /etc/disktab . 197.Pp 198.Dl vnconfig -u vnd0 199.Pp 200Unconfigures the 201.Pa vnd0 202device. 203.Sh SEE ALSO 204.Xr opendisk 3 , 205.Xr vnd 4 , 206.Xr mount 8 , 207.Xr swapctl 8 , 208.Xr umount 8 209.Sh HISTORY 210The 211.Nm 212command appeared in 213.Nx 1.0 . 214.Sh BUGS 215This command should really be named 216.Nm vndconfig . 217