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Commit 3703b2c5 authored by Nicholas Bellinger's avatar Nicholas Bellinger Committed by James Bottomley
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[SCSI] tcm_loop: Add multi-fabric Linux/SCSI LLD fabric module 

This patch adds the TCM_Loop Linux/SCSI LLD fabric module for
accessing TCM device backstores as locally accessable SCSI LUNs in
virtual SAS, FC, and iSCSI Target ports using the generic fabric
TransportID and Target Port WWN naming handlers from TCM's
target_core_fabric_lib.c The TCM_Loop module uses the generic fabric
configfs infratructure provided by target_core_fabric_configfs.c and
adds a module dependent attribute for the creation/release of the
virtual I_T Nexus connected the TCM_Loop Target and Initiator Ports.

TCM_Loop can also be used with scsi-generic and BSG drivers so that
STGT userspace fabric modules, QEMU-KVM and other hypervisor SCSI
passthrough support can access TCM device backstore and control CDB
emulation.

For more information please see:

http://linux-iscsi.org/wiki/Tcm_loop



[jejb: fixed up checkpatch stuff]
Signed-off-by: default avatarNicholas A. Bellinger <nab@linux-iscsi.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 5fa8b573

drivers/target/Kconfig

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Original line number Diff line number Diff line
@@ -29,4 +29,6 @@ config TCM_PSCSI 
	Say Y here to enable the TCM/pSCSI subsystem plugin for non-buffered

	passthrough access to Linux/SCSI device



source "drivers/target/loopback/Kconfig"



endif

drivers/target/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -21,3 +21,6 @@ obj-$(CONFIG_TARGET_CORE) += target_core_mod.o 
obj-$(CONFIG_TCM_IBLOCK)	+= target_core_iblock.o

obj-$(CONFIG_TCM_FILEIO)	+= target_core_file.o

obj-$(CONFIG_TCM_PSCSI)		+= target_core_pscsi.o



# Fabric modules

obj-$(CONFIG_LOOPBACK_TARGET)	+= loopback/

drivers/target/loopback/Kconfig

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+11 −0
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config LOOPBACK_TARGET

	tristate "TCM Virtual SAS target and Linux/SCSI LDD fabric loopback module"

	help

	  Say Y here to enable the TCM Virtual SAS target and Linux/SCSI LLD

	  fabric loopback module.



config LOOPBACK_TARGET_CDB_DEBUG

	bool "TCM loopback fabric module CDB debug code"

	depends on LOOPBACK_TARGET

	help

	  Say Y here to enable the TCM loopback fabric module CDB debug code

drivers/target/loopback/Makefile

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obj-$(CONFIG_LOOPBACK_TARGET)	+= tcm_loop.o

drivers/target/loopback/tcm_loop.c

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+1579 −0

File added.

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