122 lines
3.6 KiB
Groff
122 lines
3.6 KiB
Groff
.\" Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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.\" All rights reserved.
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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 AUTHORS 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 AUTHORS 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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.\" $FreeBSD$
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.\"
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.Dd May 21, 2004
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.Dt GEOM 8
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.Os
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.Sh NAME
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.Nm geom
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.Nd "universal control utility for GEOM classes"
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.Sh SYNOPSIS
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.Nm
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.Ar class
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.Ar command
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.Op Ar options
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.Sh DESCRIPTION
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The
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.Nm
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utility is used to control various GEOM classes.
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A class has to be aware of
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.Xr geom 8
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comunication methods, but there are also some standard commands
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which can be used for existing, not
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.Xr geom 8
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aware classes.
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Here is the list of standard commands:
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.Bl -tag -width ".Cm unload"
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.It Cm help
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List all available commands for the given class.
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.It Cm list
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Print detailed information (within the given class) about all providers
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(if no additional arguments were specified) or the given providers.
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This command is only available if the given class exists in the kernel.
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.It Cm load
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Load the kernel module that implements the given class.
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This command is only available if the class doesn't yet exist in the kernel and
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the file
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.Pa geom_<class>.ko
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can be found in one of the directories specifed in
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.Va kern.module_path
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sysctl.
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.It Cm unload
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Unload the kernel module which implements the given class.
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This command is only available if the given class is loaded as a
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kernel module.
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.El
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.Pp
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Class-specific commands are implemented as shared libraries which
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are stored in
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.Pa /lib/geom/
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directory and are loaded via
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.Xr dlopen 3
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function when the class name is known.
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When a class-specific shared library exists, a direct utility should also be
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available under the name of
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.Nm g<class> .
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.Pp
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Currently available classes which are aware of
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.Xr geom 8 :
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.Bl -bullet -offset indent -compact
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.It
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CONCAT
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.It
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NOP
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.It
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STRIPE
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.El
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.Sh EXAMPLES
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The following example shows how to set up a stripe on three disks for automatic
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configuration:
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.Bd -literal -offset indent
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geom stripe label -v -s 65536 data /dev/da0 /dev/da1 /dev/da2
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or:
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gstripe label -v -s 65536 data /dev/da0 /dev/da1 /dev/da2
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.Ed
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.Pp
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Print the list of all providers from the DISK class:
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.Bd -literal -offset indent
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geom disk list
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.Ed
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.Pp
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Unload a kernel module which implements the MD class:
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.Bd -literal -offset indent
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geom md unload
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.Ed
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.Sh DIAGNOSTICS
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Exit status is 0 on success, and 1 if the command fails.
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.Sh SEE ALSO
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.Xr geom 4 ,
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.Xr gconcat 8 ,
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.Xr gnop 8 ,
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.Xr gstripe 8
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.Sh HISTORY
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The
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.Nm
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utility appeared in
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.Fx 5.3 .
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.Sh AUTHORS
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.An Pawel Jakub Dawidek Aq pjd@FreeBSD.org
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