94 lines
2.7 KiB
Groff
94 lines
2.7 KiB
Groff
.\" Copyright (c) 2013 Edward Tomasz Napierala
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.Dd April 2, 2013
|
|
.Dt CTL 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm ctl
|
|
.Nd CAM Target Layer
|
|
.Sh SYNOPSIS
|
|
To compile this driver into the kernel,
|
|
place the following line in your
|
|
kernel configuration file:
|
|
.Bd -ragged -offset indent
|
|
.Cd "device ctl"
|
|
.Ed
|
|
.Pp
|
|
Alternatively, to load the driver as a
|
|
module at boot time, place the following line in
|
|
.Xr loader.conf 5 :
|
|
.Bd -literal -offset indent
|
|
ctl_load="YES"
|
|
.Ed
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
subsystem provides SCSI disk and processor emulation.
|
|
It supports features such as:
|
|
.Pp
|
|
.Bl -bullet -compact
|
|
.It
|
|
Disk and processor device emulation
|
|
.It
|
|
Tagged queueing
|
|
.It
|
|
SCSI task attribute support (ordered, head of queue, simple tags)
|
|
.It
|
|
SCSI implicit command ordering support.
|
|
.It
|
|
Full task management support (abort, LUN reset, target reset, etc.)
|
|
.It
|
|
Support for multiple ports
|
|
.It
|
|
Support for multiple simultaneous initiators
|
|
.It
|
|
Support for multiple simultaneous backing stores
|
|
.It
|
|
Persistent reservation support
|
|
.It
|
|
Mode sense/select support
|
|
.It
|
|
Error injection support
|
|
.It
|
|
All I/O handled in-kernel, no userland context switch overhead
|
|
.El
|
|
.Pp
|
|
It also serves as a kernel component of the native iSCSI target.
|
|
.Sh SEE ALSO
|
|
.Xr ctladm 8 ,
|
|
.Xr ctld 8 ,
|
|
.Xr ctlstat 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
subsystem first appeared in
|
|
.Fx 9.1 .
|
|
.Sh AUTHORS
|
|
The
|
|
.Nm
|
|
subsystem was written by
|
|
.An Kenneth Merry Aq ken@FreeBSD.org .
|