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ctl — CAM Target Layer
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"
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.
The ctl subsystem first appeared in FreeBSD 9.1.
The ctl subsystem was written by Kenneth Merry <ken@FreeBSD.org>.