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c66ac9db8d
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>
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
#ifndef TARGET_CORE_PSCSI_H
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#define TARGET_CORE_PSCSI_H
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#define PSCSI_VERSION "v4.0"
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#define PSCSI_VIRTUAL_HBA_DEPTH 2048
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/* used in pscsi_find_alloc_len() */
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#ifndef INQUIRY_DATA_SIZE
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#define INQUIRY_DATA_SIZE 0x24
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#endif
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/* used in pscsi_add_device_to_list() */
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#define PSCSI_DEFAULT_QUEUEDEPTH 1
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#define PS_RETRY 5
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#define PS_TIMEOUT_DISK (15*HZ)
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#define PS_TIMEOUT_OTHER (500*HZ)
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#include <linux/device.h>
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#include <scsi/scsi_driver.h>
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#include <scsi/scsi_device.h>
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#include <linux/kref.h>
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#include <linux/kobject.h>
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struct pscsi_plugin_task {
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struct se_task pscsi_task;
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unsigned char *pscsi_cdb;
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unsigned char __pscsi_cdb[TCM_MAX_COMMAND_SIZE];
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unsigned char pscsi_sense[SCSI_SENSE_BUFFERSIZE];
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int pscsi_direction;
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int pscsi_result;
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u32 pscsi_resid;
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struct request *pscsi_req;
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} ____cacheline_aligned;
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#define PDF_HAS_CHANNEL_ID 0x01
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#define PDF_HAS_TARGET_ID 0x02
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#define PDF_HAS_LUN_ID 0x04
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#define PDF_HAS_VPD_UNIT_SERIAL 0x08
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#define PDF_HAS_VPD_DEV_IDENT 0x10
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#define PDF_HAS_VIRT_HOST_ID 0x20
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struct pscsi_dev_virt {
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int pdv_flags;
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int pdv_host_id;
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int pdv_channel_id;
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int pdv_target_id;
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int pdv_lun_id;
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struct block_device *pdv_bd;
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struct scsi_device *pdv_sd;
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struct se_hba *pdv_se_hba;
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} ____cacheline_aligned;
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typedef enum phv_modes {
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PHV_VIRUTAL_HOST_ID,
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PHV_LLD_SCSI_HOST_NO
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} phv_modes_t;
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struct pscsi_hba_virt {
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int phv_host_id;
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phv_modes_t phv_mode;
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struct Scsi_Host *phv_lld_host;
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} ____cacheline_aligned;
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#endif /*** TARGET_CORE_PSCSI_H ***/
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