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.conf(5):

           ctl_load="YES"

DESCRIPTION

     The ctl 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 ctl subsystem first appeared in FreeBSD 9.1.

AUTHORS

     The ctl subsystem was written by Kenneth Merry <ken@FreeBSD.org>.