[SCSI] target: Add LIO target core v4.0.0-rc6

LIO target is a full featured in-kernel target framework with the
following feature set:

High-performance, non-blocking, multithreaded architecture with SIMD
support.

Advanced SCSI feature set:

    * Persistent Reservations (PRs)
    * Asymmetric Logical Unit Assignment (ALUA)
    * Protocol and intra-nexus multiplexing, load-balancing and failover (MC/S)
    * Full Error Recovery (ERL=0,1,2)
    * Active/active task migration and session continuation (ERL=2)
    * Thin LUN provisioning (UNMAP and WRITE_SAMExx)

Multiprotocol target plugins

Storage media independence:

    * Virtualization of all storage media; transparent mapping of IO to LUNs
    * No hard limits on number of LUNs per Target; maximum LUN size ~750 TB
    * Backstores: SATA, SAS, SCSI, BluRay, DVD, FLASH, USB, ramdisk, etc.

Standards compliance:

    * Full compliance with IETF (RFC 3720)
    * Full implementation of SPC-4 PRs and ALUA

Significant code cleanups done by Christoph Hellwig.

[jejb: fix up for new block bdev exclusive interface. Minor fixes from
 Randy Dunlap and Dan Carpenter.]
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/target/Kconfig b/drivers/target/Kconfig
new file mode 100644
index 00000000000..2fac3be209a
--- /dev/null
+++ b/drivers/target/Kconfig
@@ -0,0 +1,32 @@
+
+menuconfig TARGET_CORE
+        tristate "Generic Target Core Mod (TCM) and ConfigFS Infrastructure"
+        depends on SCSI && BLOCK
+        select CONFIGFS_FS
+        default n
+        help
+        Say Y or M here to enable the TCM Storage Engine and ConfigFS enabled
+        control path for target_core_mod.  This includes built-in TCM RAMDISK
+        subsystem logic for virtual LUN 0 access
+
+if TARGET_CORE
+
+config TCM_IBLOCK
+        tristate "TCM/IBLOCK Subsystem Plugin for Linux/BLOCK"
+        help
+        Say Y here to enable the TCM/IBLOCK subsystem plugin for non-buffered
+        access to Linux/Block devices using BIO
+
+config TCM_FILEIO
+        tristate "TCM/FILEIO Subsystem Plugin for Linux/VFS"
+        help
+        Say Y here to enable the TCM/FILEIO subsystem plugin for buffered
+        access to Linux/VFS struct file or struct block_device
+
+config TCM_PSCSI
+        tristate "TCM/pSCSI Subsystem Plugin for Linux/SCSI"
+        help
+        Say Y here to enable the TCM/pSCSI subsystem plugin for non-buffered
+        passthrough access to Linux/SCSI device
+
+endif