dkctl(8) -- a program to manupulate disks. It currently supports
the disk cache-related ioctls.
This commit is contained in:
thorpej
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# $NetBSD: Makefile,v 1.1 2002/01/09 22:30:14 thorpej Exp $
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PROG= dkctl
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MAN= dkctl.8
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LDADD+= -lutil
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DPADD+= ${LIBUTIL}
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.include <bsd.prog.mk>
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.\" $NetBSD: dkctl.8,v 1.1 2002/01/09 22:30:14 thorpej Exp $
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.\"
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.\" Copyright 2002 Wasabi Systems, Inc.
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.\" All rights reserved.
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.\"
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.\" Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed for the NetBSD Project by
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.\" Wasabi Systems, Inc.
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.\" 4. The name of Wasabi Systems, Inc. may not be used to endorse
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.\" or promote products derived from this software without specific prior
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.\" written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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.\" 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 WASABI SYSTEMS, INC
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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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.Dd January 9, 2002
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.Dt DKCTL 8
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.Os
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.Sh NAME
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.Nm dkctl
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.Nd a program to manipulate disks
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.Sh SYNOPSIS
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.Nm
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.Ar device
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.Ar command
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.Oo
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.Ar arg Oo ...
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.Oc
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.Oc
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.Sh DESCRIPTION
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.Nm
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allows a user or system administrator to manipulate and configure disks
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in various ways. It is used by specifying a disk manipulate, the command
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to perform, and any arguments the command may require.
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.Sh COMMANDS
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The following commands are supported:
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.Pp
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.Nm getcache
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.Pp
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Get and display the cache enables for the specified device.
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.Pp
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.Nm setcache
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.Ar none | r | w | rw
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.Op Ar save
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.Pp
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Set the cache enables for the specified device. The enables are
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as follows:
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.Bl -tag -width indent
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.It none
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Disable all caches on the disk.
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.It r
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Enable the read cache, and disable all other caches on the disk.
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.It w
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Enable the write cache, and disable all other caches on the disk.
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.It rw
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Enable both the read and write caches on the disk.
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.It save
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If specified, and the cache enables are savable, saves the cache
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enables in the disk's non-volatile parameter storage.
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.El
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.Pp
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.Nm synccache
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.Op Ar force
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.Pp
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Causes the cache on the disk to be synchronized, flushing all dirty
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write cache blocks to the media. If
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.Ar force
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is specified, the cache synchronization command will be issued even
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if the kernel does not believe that there are any dirty cache blocks
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in the disk's cache.
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.Sh SEE ALSO
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.Xr ioctl 2 ,
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.Xr sd 4 ,
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.Xr wd 4 ,
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.Sh HISTORY
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The
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.Nm
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command first appeared in
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.Nx 1.6 .
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.Sh AUTHORS
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The
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.Nm
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command was written by Jason R. Thorpe of Wasabi Systems, Inc.
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@ -0,0 +1,227 @@
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/* $NetBSD: dkctl.c,v 1.1 2002/01/09 22:30:14 thorpej Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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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/*
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* dkctl(8) -- a program to manipulate disks.
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*/
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/dkio.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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struct command {
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const char *cmd_name;
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const char *arg_names;
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void (*cmd_func)(int, char *[]);
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int open_flags;
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};
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int main(int, char *[]);
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void usage(void);
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int fd; /* file descriptor for device */
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const char *dvname; /* device name */
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char dvname_store[MAXPATHLEN]; /* for opendisk(3) */
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const char *cmdname; /* command user issued */
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const char *argnames; /* helpstring; expected arguments */
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void disk_getcache(int, char *[]);
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void disk_setcache(int, char *[]);
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void disk_synccache(int, char *[]);
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struct command commands[] = {
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{ "getcache",
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"",
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disk_getcache,
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O_RDONLY },
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{ "setcache",
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"none | r | w | rw [save]",
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disk_setcache,
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O_RDWR },
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{ "synccache",
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"[force]",
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disk_synccache,
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O_RDWR },
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{ NULL,
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NULL,
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NULL,
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0 },
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};
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int
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main(int argc, char *argv[])
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{
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int i;
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/* Must have at least: device command */
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if (argc < 3)
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usage();
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/* Skip program name, get and skip device name and command. */
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dvname = argv[1];
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cmdname = argv[2];
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argv += 3;
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argc -= 3;
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/* Look up and call the command. */
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for (i = 0; commands[i].cmd_name != NULL; i++)
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if (strcmp(cmdname, commands[i].cmd_name) == 0)
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break;
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if (commands[i].cmd_name == NULL)
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errx(1, "unknown command: %s", cmdname);
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argnames = commands[i].arg_names;
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/* Open the device. */
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fd = opendisk(dvname, commands[i].open_flags, dvname_store,
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sizeof(dvname_store), 0);
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if (fd == -1)
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err(1, "%s", dvname);
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dvname = dvname_store;
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(*commands[i].cmd_func)(argc, argv);
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exit(0);
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}
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void
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usage()
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{
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int i;
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fprintf(stderr, "Usage: %s device command [arg [...]]\n",
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getprogname());
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fprintf(stderr, " Available commands:\n");
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for (i = 0; commands[i].cmd_name != NULL; i++)
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fprintf(stderr, "\t%s %s\n", commands[i].cmd_name,
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commands[i].arg_names);
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exit(1);
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}
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void
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disk_getcache(int argc, char *argv[])
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{
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int bits;
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if (ioctl(fd, DIOCGCACHE, &bits) == -1)
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err(1, "%s: getcache", dvname);
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if ((bits & (DKCACHE_READ|DKCACHE_WRITE)) == 0)
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printf("%s: No caches enabled\n", dvname);
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else {
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if (bits & DKCACHE_READ)
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printf("%s: read cache enabled\n", dvname);
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if (bits & DKCACHE_WRITE)
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printf("%s: write-back cache enabled\n", dvname);
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}
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printf("%s: read cache enable is %schangeable\n", dvname,
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(bits & DKCACHE_RCHANGE) ? "" : "not ");
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printf("%s: write cache enable is %schangeable\n", dvname,
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(bits & DKCACHE_WCHANGE) ? "" : "not ");
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printf("%s: cache parameters are %ssavable\n", dvname,
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(bits & DKCACHE_SAVE) ? "" : "not ");
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}
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void
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disk_setcache(int argc, char *argv[])
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{
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int bits;
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if (argc > 2 || argc == 0)
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usage();
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if (strcmp(argv[0], "none") == 0)
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bits = 0;
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else if (strcmp(argv[0], "r") == 0)
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bits = DKCACHE_READ;
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else if (strcmp(argv[0], "w") == 0)
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bits = DKCACHE_WRITE;
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else if (strcmp(argv[0], "rw") == 0)
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bits = DKCACHE_READ|DKCACHE_WRITE;
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else
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usage();
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if (argc == 2) {
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if (strcmp(argv[1], "save") == 0)
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bits |= DKCACHE_SAVE;
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else
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usage();
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}
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if (ioctl(fd, DIOCSCACHE, &bits) == -1)
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err(1, "%s: setcache", dvname);
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}
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void
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disk_synccache(int argc, char *argv[])
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{
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int force;
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switch (argc) {
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case 0:
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force = 0;
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break;
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case 1:
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if (strcmp(argv[0], "force") == 0)
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force = 1;
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else
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usage();
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break;
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default:
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usage();
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}
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if (ioctl(fd, DIOCCACHESYNC, &force) == -1)
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err(1, "%s: sync cache", dvname);
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}
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