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>
41 lines
908 B
C
41 lines
908 B
C
#ifndef TARGET_CORE_IBLOCK_H
|
|
#define TARGET_CORE_IBLOCK_H
|
|
|
|
#define IBLOCK_VERSION "4.0"
|
|
|
|
#define IBLOCK_HBA_QUEUE_DEPTH 512
|
|
#define IBLOCK_DEVICE_QUEUE_DEPTH 32
|
|
#define IBLOCK_MAX_DEVICE_QUEUE_DEPTH 128
|
|
#define IBLOCK_MAX_CDBS 16
|
|
#define IBLOCK_LBA_SHIFT 9
|
|
|
|
struct iblock_req {
|
|
struct se_task ib_task;
|
|
unsigned char ib_scsi_cdb[TCM_MAX_COMMAND_SIZE];
|
|
atomic_t ib_bio_cnt;
|
|
atomic_t ib_bio_err_cnt;
|
|
struct bio *ib_bio;
|
|
struct iblock_dev *ib_dev;
|
|
} ____cacheline_aligned;
|
|
|
|
#define IBDF_HAS_UDEV_PATH 0x01
|
|
#define IBDF_HAS_FORCE 0x02
|
|
|
|
struct iblock_dev {
|
|
unsigned char ibd_udev_path[SE_UDEV_PATH_LEN];
|
|
int ibd_force;
|
|
int ibd_major;
|
|
int ibd_minor;
|
|
u32 ibd_depth;
|
|
u32 ibd_flags;
|
|
struct bio_set *ibd_bio_set;
|
|
struct block_device *ibd_bd;
|
|
struct iblock_hba *ibd_host;
|
|
} ____cacheline_aligned;
|
|
|
|
struct iblock_hba {
|
|
int iblock_host_id;
|
|
} ____cacheline_aligned;
|
|
|
|
#endif /* TARGET_CORE_IBLOCK_H */
|