ctl (4)

Leading comments

Copyright (c) 2013 Edward Tomasz Napierala
Copyright (c) 2015 Alexander Motin <mav@FreeBSD.org>
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 a...

(The comments found at the beginning of the groff file "man4/ctl.4freebsd".)

NAME

ctl - CAM Target Layer

SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:

device ctl

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

ctl_load="YES"

DESCRIPTION

The subsystem provides SCSI disk and processor emulation. It supports features such as:

• Disk and processor device emulation
• Tagged queueing
• SCSI task attribute support (ordered, head of queue, simple tags)
• SCSI implicit command ordering support.
• Full task management support (abort, LUN reset, target reset, etc.)
• Support for multiple ports
• Support for multiple simultaneous initiators
• Support for multiple simultaneous backing stores
• Persistent reservation support
• Mode sense/select support
• Error injection support
• All I/O handled in-kernel, no userland context switch overhead

It also serves as a kernel component of the native iSCSI target.

SEE ALSO

ctladm(8), ctld(8), ctlstat(8)

HISTORY

The subsystem first appeared in Fx 9.1 .

AUTHORS

The subsystem was written by An Kenneth Merry Aq ken@FreeBSD.org .