1.\" $NetBSD: vnconfig.8,v 1.12 1997/10/18 03:54:00 lukem 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 BSD 4 78.Sh NAME 79.Nm vnconfig 80.Nd configure vnode disks 81.Sh SYNOPSIS 82.Nm 83.Op Fl c 84.Op Fl t Ar typename 85.Op Fl v 86.Ar vnode_disk 87.Ar regular_file 88.Op Ar geomspec 89.Nm "" 90.Fl u 91.Op Fl v 92.Ar vnode_disk 93.Sh DESCRIPTION 94The 95.Nm 96command configures vnode pseudo disk devices. 97It will associate the vnode disk 98.Ar vnode_disk 99with the regular file 100.Ar regular_file 101allowing the latter to be accessed as though it were a disk. 102Hence a regular file within the filesystem can be used for swapping 103or can contain a filesystem that is mounted in the name space. 104The 105.Ar vnode_disk 106is a special file of raw partition or name of vnode disk like 107.Pa vnd0 . 108.Pp 109Options indicate an action to be performed: 110.Bl -tag -width indent 111.It Fl c 112Configures the device. 113If successful, references to 114.Ar vnode_disk 115will access the contents of 116.Ar regular_file . 117If 118.Op Ar geomspec 119is specified, the vnode device will emulate the specified disk geometry. 120The format of the 121.Op Ar geomspec 122argument is 123.Dq secsize/nsectors/ntracks/ncylinders . 124If geometry is not specified, the kernel will choose a default based on 1MB 125cylinders. 126.Dq secsize 127is the number of bytes per sector. It must be an even multiple of 512. 128.Dq nsectors 129is the number of sectors per track. 130.Dq ntracks 131is the number of tracks per cylinder. 132.Dq ncylinders 133is the number of cylinders in the device. 134.It Fl t Ar typename 135If configuring the device, look up 136.Ar typename 137in 138.Pa /etc/disktab 139and use the geometry specified in the entry. This option is mutually 140exclusive the 141.Ar geomspec 142argument. 143.It Fl u 144Unconfigures the device. 145.It Fl v 146Print messages to stdout describing actions taken. 147.El 148.Pp 149If no action option is given, 150.Fl c 151is assumed. 152.Sh FILES 153.Bl -tag -width /etc/disktab -compact 154.It Pa /dev/rvnd?? 155.It Pa /dev/vnd?? 156.It Pa /etc/disktab 157.El 158.Sh EXAMPLES 159.Pp 160.Dl vnconfig /dev/vnd0c /tmp/diskimage 161or 162.Dl vnconfig vnd0 /tmp/diskimage 163.Pp 164Configures the vnode disk 165.Pa vnd0 . 166.Pp 167.Dl vnconfig /dev/vnd0c /tmp/floppy.img 512/18/2/80 168.Pp 169Configures the vnode disk 170.Pa vnd0 171emulating the geometry of 512 bytes per sector, 18 sectors per track, 1722 tracks per cylinder, and 80 cylinders total. 173.Pp 174.Pp 175.Dl vnconfig -t floppy /dev/vnd0c /tmp/floppy.img 176.Pp 177Configures the vnode disk 178.Pa vnd0 179using the geometry specified in the 180.Pa floppy 181entry in 182.Pa /etc/disktab . 183.Pp 184.Dl vnconfig -u /dev/vnd0c 185.Pp 186Unconfigures the 187.Pa vnd0 188device. 189.Sh BUGS 190This command should really be named 191.Nm vndconfig . 192.Sh SEE ALSO 193.Xr opendisk 3 , 194.Xr swapctl 8 , 195.Xr mount 8 , 196.Xr umount 8 , 197.Xr vnd 4 . 198