From c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Fri, 17 Dec 2010 11:11:26 -0800 Subject: [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 Signed-off-by: James Bottomley --- drivers/target/target_core_file.h | 50 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 drivers/target/target_core_file.h (limited to 'drivers/target/target_core_file.h') 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 */ -- cgit