[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, 36 insertions, 0 deletions

diff --git a/drivers/target/target_core_ua.h b/drivers/target/target_core_ua.h
new file mode 100644
index 000000000000..6e6b03460a1a
--- /dev/null
+++ b/drivers/target/target_core_ua.h
@@ -0,0 +1,36 @@
+#ifndef TARGET_CORE_UA_H
+
+/*
+ * From spc4r17, Table D.1: ASC and ASCQ Assignement
+ */
+#define ASCQ_29H_POWER_ON_RESET_OR_BUS_DEVICE_RESET_OCCURED     0x00
+#define ASCQ_29H_POWER_ON_OCCURRED                              0x01
+#define ASCQ_29H_SCSI_BUS_RESET_OCCURED                         0x02
+#define ASCQ_29H_BUS_DEVICE_RESET_FUNCTION_OCCURRED             0x03
+#define ASCQ_29H_DEVICE_INTERNAL_RESET                          0x04
+#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_SINGLE_ENDED       0x05
+#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_LVD                0x06
+#define ASCQ_29H_NEXUS_LOSS_OCCURRED                            0x07
+
+#define ASCQ_2AH_PARAMETERS_CHANGED                             0x00
+#define ASCQ_2AH_MODE_PARAMETERS_CHANGED                        0x01
+#define ASCQ_2AH_LOG_PARAMETERS_CHANGED                         0x02
+#define ASCQ_2AH_RESERVATIONS_PREEMPTED                         0x03
+#define ASCQ_2AH_RESERVATIONS_RELEASED                          0x04
+#define ASCQ_2AH_REGISTRATIONS_PREEMPTED                        0x05
+#define ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED                0x06
+#define ASCQ_2AH_IMPLICT_ASYMMETRIC_ACCESS_STATE_TRANSITION_FAILED 0x07
+#define ASCQ_2AH_PRIORITY_CHANGED                               0x08
+
+#define ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS           0x09
+
+extern struct kmem_cache *se_ua_cache;
+
+extern int core_scsi3_ua_check(struct se_cmd *, unsigned char *);
+extern int core_scsi3_ua_allocate(struct se_node_acl *, u32, u8, u8);
+extern void core_scsi3_ua_release_all(struct se_dev_entry *);
+extern void core_scsi3_ua_for_check_condition(struct se_cmd *, u8 *, u8 *);
+extern int core_scsi3_ua_clear_for_request_sense(struct se_cmd *,
+                                                u8 *, u8 *);
+
+#endif /* TARGET_CORE_UA_H */