linux/drivers/target/target_core_pscsi.h
Nicholas Bellinger c66ac9db8d [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>
2011-01-14 10:12:29 -06:00

65 lines
1.5 KiB
C

#ifndef TARGET_CORE_PSCSI_H
#define TARGET_CORE_PSCSI_H
#define PSCSI_VERSION "v4.0"
#define PSCSI_VIRTUAL_HBA_DEPTH 2048
/* used in pscsi_find_alloc_len() */
#ifndef INQUIRY_DATA_SIZE
#define INQUIRY_DATA_SIZE 0x24
#endif
/* used in pscsi_add_device_to_list() */
#define PSCSI_DEFAULT_QUEUEDEPTH 1
#define PS_RETRY 5
#define PS_TIMEOUT_DISK (15*HZ)
#define PS_TIMEOUT_OTHER (500*HZ)
#include <linux/device.h>
#include <scsi/scsi_driver.h>
#include <scsi/scsi_device.h>
#include <linux/kref.h>
#include <linux/kobject.h>
struct pscsi_plugin_task {
struct se_task pscsi_task;
unsigned char *pscsi_cdb;
unsigned char __pscsi_cdb[TCM_MAX_COMMAND_SIZE];
unsigned char pscsi_sense[SCSI_SENSE_BUFFERSIZE];
int pscsi_direction;
int pscsi_result;
u32 pscsi_resid;
struct request *pscsi_req;
} ____cacheline_aligned;
#define PDF_HAS_CHANNEL_ID 0x01
#define PDF_HAS_TARGET_ID 0x02
#define PDF_HAS_LUN_ID 0x04
#define PDF_HAS_VPD_UNIT_SERIAL 0x08
#define PDF_HAS_VPD_DEV_IDENT 0x10
#define PDF_HAS_VIRT_HOST_ID 0x20
struct pscsi_dev_virt {
int pdv_flags;
int pdv_host_id;
int pdv_channel_id;
int pdv_target_id;
int pdv_lun_id;
struct block_device *pdv_bd;
struct scsi_device *pdv_sd;
struct se_hba *pdv_se_hba;
} ____cacheline_aligned;
typedef enum phv_modes {
PHV_VIRUTAL_HOST_ID,
PHV_LLD_SCSI_HOST_NO
} phv_modes_t;
struct pscsi_hba_virt {
int phv_host_id;
phv_modes_t phv_mode;
struct Scsi_Host *phv_lld_host;
} ____cacheline_aligned;
#endif /*** TARGET_CORE_PSCSI_H ***/