[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, 50 insertions, 0 deletions

diff --git a/drivers/target/target_core_file.h b/drivers/target/target_core_file.h
new file mode 100644
index 000000000000..ef4de2b4bd46
--- /dev/null
+++ b/drivers/target/target_core_file.h
@@ -0,0 +1,50 @@
+#ifndef TARGET_CORE_FILE_H
+#define TARGET_CORE_FILE_H
+
+#define FD_VERSION              "4.0"
+
+#define FD_MAX_DEV_NAME         256
+/* Maximum queuedepth for the FILEIO HBA */
+#define FD_HBA_QUEUE_DEPTH      256
+#define FD_DEVICE_QUEUE_DEPTH   32
+#define FD_MAX_DEVICE_QUEUE_DEPTH 128
+#define FD_BLOCKSIZE            512
+#define FD_MAX_SECTORS          1024
+
+#define RRF_EMULATE_CDB         0x01
+#define RRF_GOT_LBA             0x02
+
+struct fd_request {
+        struct se_task  fd_task;
+        /* SCSI CDB from iSCSI Command PDU */
+        unsigned char   fd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
+        /* FILEIO device */
+        struct fd_dev   *fd_dev;
+} ____cacheline_aligned;
+
+#define FBDF_HAS_PATH           0x01
+#define FBDF_HAS_SIZE           0x02
+#define FDBD_USE_BUFFERED_IO    0x04
+
+struct fd_dev {
+        u32             fbd_flags;
+        unsigned char   fd_dev_name[FD_MAX_DEV_NAME];
+        /* Unique Ramdisk Device ID in Ramdisk HBA */
+        u32             fd_dev_id;
+        /* Number of SG tables in sg_table_array */
+        u32             fd_table_count;
+        u32             fd_queue_depth;
+        u32             fd_block_size;
+        unsigned long long fd_dev_size;
+        struct file     *fd_file;
+        /* FILEIO HBA device is connected to */
+        struct fd_host *fd_host;
+} ____cacheline_aligned;
+
+struct fd_host {
+        u32             fd_host_dev_id_count;
+        /* Unique FILEIO Host ID */
+        u32             fd_host_id;
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_FILE_H */