1.\" $NetBSD: vnconfig.8,v 1.11 1997/10/01 01:32:59 enami 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 vnconfig Op Fl c 83.Op Fl t Ar typename 84.Op Fl v 85.Ar vnode_disk 86.Ar regular_file 87.Op Ar geomspec 88.Nm vnconfig Fl u 89.Op Fl v 90.Ar vnode_disk 91.Sh DESCRIPTION 92The 93.Nm vnconfig 94command configures vnode pseudo disk devices. 95It will associate the vnode disk 96.Ar vnode_disk 97with the regular file 98.Ar regular_file 99allowing the latter to be accessed as though it were a disk. 100Hence a regular file within the filesystem can be used for swapping 101or can contain a filesystem that is mounted in the name space. 102The 103.Ar vnode_disk 104is a special file of raw partition or name of vnode disk like 105.Pa vnd0 . 106.Pp 107Options indicate an action to be performed: 108.Bl -tag -width indent 109.It Fl c 110Configures the device. 111If successful, references to 112.Ar vnode_disk 113will access the contents of 114.Ar regular_file . 115If 116.Op Ar geomspec 117is specified, the vnode device will emulate the specified disk geometry. 118The format of the 119.Op Ar geomspec 120argument is 121.Dq secsize/nsectors/ntracks/ncylinders . 122If geometry is not specified, the kernel will choose a default based on 1MB 123cylinders. 124.Dq secsize 125is the number of bytes per sector. It must be an even multiple of 512. 126.Dq nsectors 127is the number of sectors per track. 128.Dq ntracks 129is the number of tracks per cylinder. 130.Dq ncylinders 131is the number of cylinders in the device. 132.It Fl t Ar typename 133If configuring the device, look up 134.Ar typename 135in 136.Pa /etc/disktab 137and use the geometry specified in the entry. This option is mutually 138exclusive the 139.Ar geomspec 140argument. 141.It Fl u 142Unconfigures the device. 143.It Fl v 144Print messages to stdout describing actions taken. 145.El 146.Pp 147If no action option is given, 148.Fl c 149is assumed. 150.Sh FILES 151.Bl -tag -width /etc/disktab -compact 152.It Pa /dev/rvnd?? 153.It Pa /dev/vnd?? 154.It Pa /etc/disktab 155.El 156.Sh EXAMPLES 157.Pp 158.Dl vnconfig /dev/vnd0c /tmp/diskimage 159or 160.Dl vnconfig vnd0 /tmp/diskimage 161.Pp 162Configures the vnode disk 163.Pa vnd0 . 164.Pp 165.Dl vnconfig /dev/vnd0c /tmp/floppy.img 512/18/2/80 166.Pp 167Configures the vnode disk 168.Pa vnd0 169emulating the geometry of 512 bytes per sector, 18 sectors per track, 1702 tracks per cylinder, and 80 cylinders total. 171.Pp 172.Pp 173.Dl vnconfig -t floppy /dev/vnd0c /tmp/floppy.img 174.Pp 175Configures the vnode disk 176.Pa vnd0 177using the geometry specified in the 178.Pa floppy 179entry in 180.Pa /etc/disktab . 181.Pp 182.Dl vnconfig -u /dev/vnd0c 183.Pp 184Unconfigures the 185.Pa vnd0 186device. 187.Sh BUGS 188This command should really be named 189.Nm vndconfig . 190.Sh SEE ALSO 191.Xr opendisk 3 , 192.Xr swapctl 8 , 193.Xr mount 8 , 194.Xr umount 8 , 195.Xr vnd 4 . 196