kernel/linux.git/drivers/target/Kconfig, branch v6.19.11

scsi: target: Add virtual remote target

2023-03-17T03:36:37+00:00

Create virtual remote target module. This can be used to see a whole ACL/LUN/TPG configuration from all nodes in storage cluster. For example, it permits setting up remote ports in ALUA port groups. To report all ports in a cluster in REPORT TARGET PORT GROUP command. Suggested-by: Konstantin Shelekhin Signed-off-by: Dmitry Bogdanov Link: https://lore.kernel.org/r/20230313181110.20566-13-d.bogdanov@yadro.com Reviewed-by: Mike Christie Signed-off-by: Martin K. Petersen

scsi: core: Rename CONFIG_BLK_SCSI_REQUEST to CONFIG_SCSI_COMMON

2021-07-29T02:24:27+00:00

CONFIG_BLK_SCSI_REQUEST is rather misnamed as it enables building a small amount of code shared by the SCSI initiator, target, and consumers of the scsi_request passthrough API. Rename it and also allow building it as a module. [mkp: add module license] Link: https://lore.kernel.org/r/20210724072033.1284840-20-hch@lst.de Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

target: don't depend on SCSI

2018-08-02T21:19:49+00:00

The core target code only needs code from scsi_common.c, which is now separately selectable. Signed-off-by: Christoph Hellwig Signed-off-by: Kees Cook Signed-off-by: Jens Axboe

target: Use sgl_alloc_order() and sgl_free()

2018-01-06T16:18:00+00:00

Use the sgl_alloc_order() and sgl_free() functions instead of open coding these functions. Signed-off-by: Bart Van Assche Acked-by: Nicholas A. Bellinger Reviewed-by: Hannes Reinecke Cc: Christoph Hellwig Cc: Sagi Grimberg Signed-off-by: Jens Axboe

block: make scsi_request and scsi ioctl support optional

2017-01-31T17:53:05+00:00

We only need this code to support scsi, ide, cciss and virtio. And at least for virtio it's a deprecated feature to start with. This should shrink the kernel size for embedded device that only use, say eMMC a bit. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

target: Put TCMU under a new config option

2015-04-20T05:41:12+00:00

Conceptually version 2 should be viewed as an entirely new, incompatible version of TCMU, so emphasize this by changing the config option and Kconfig text. Signed-off-by: Andy Grover Signed-off-by: Nicholas Bellinger

target: Add a user-passthrough backstore

2014-10-03T18:15:20+00:00

Add a LIO storage engine that presents commands to userspace for execution. This would allow more complex backstores to be implemented out-of-kernel, and also make experimentation a-la FUSE (but at the SCSI level -- "SUSE"?) possible. It uses a mmap()able UIO device per LUN to share a command ring and data area. The commands are raw SCSI CDBs and iovs for in/out data. The command ring is also reused for returning scsi command status and optional sense data. This implementation is based on Shaohua Li's earlier version but heavily modified. Differences include: * Shared memory allocated by kernel, not locked-down user pages * Single ring for command request and response * Offsets instead of embedded pointers * Generic SCSI CDB passthrough instead of per-cmd specialization in ring format. * Uses UIO device instead of anon_file passed in mailbox. * Optional in-kernel handling of some commands. The main reason for these differences is to permit greater resiliency if the user process dies or hangs. Things not yet implemented (on purpose): * Zero copy. The data area is flexible enough to allow page flipping or backend-allocated pages to be used by fabrics, but it's not clear these are performance wins. Can come later. * Out-of-order command completion by userspace. Possible to add by just allowing userspace to change cmd_id in rsp cmd entries, but currently not supported. * No locks between kernel cmd submission and completion routines. Sounds like it's possible, but this can come later. * Sparse allocation of mmaped area. Current code vmallocs the whole thing. If the mapped area was larger and not fully mapped then the driver would have more freedom to change cmd and data area sizes based on demand. Current code open issues: * The use of idrs may be overkill -- we maybe can replace them with a simple counter to generate cmd_ids, and a hash table to get a cmd_id's associated pointer. * Use of a free-running counter for cmd ring instead of explicit modulo math. This would require power-of-2 cmd ring size. (Add kconfig depends NET - Randy) Signed-off-by: Andy Grover Signed-off-by: Nicholas Bellinger

target/iblock: Add blk_integrity + BIP passthrough support

2014-01-18T10:14:22+00:00

This patch adds blk_integrity passthrough support for block_device backends using IBLOCK. This includes iblock_alloc_bip() + setup of bio_integrity_payload information that attaches to the leading struct bio once bio_list is populated during fast-path iblock_execute_rw() I/O dispatch. It also updates setup in iblock_configure_device() to detect modes of protection + se dev->dev_attrib.pi_prot_type accordingly, along with creating required bio_set integrity mempools. Cc: Martin K. Petersen Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: Sagi Grimberg Cc: Or Gerlitz Signed-off-by: Nicholas Bellinger

target/sbc: Add DIF TYPE1+TYPE3 read/write verify emulation

2014-01-18T09:53:12+00:00

This patch adds support for DIF read/write verify emulation for TARGET_DIF_TYPE1_PROT + TARGET_DIF_TYPE3_PROT operation. This includes sbc_dif_verify_write() + sbc_dif_verify_read() calls accessable by backend drivers to perform DIF verify for SGL based data and protection information. Also included is sbc_dif_copy_prot() logic to copy protection information to/from backend provided protection SGLs. Based on scsi_debug.c DIF TYPE1+TYPE3 emulation. v2 changes: - Select CRC_T10DIF for TARGET_CORE in Kconfig (Fengguang) - Drop IP checksum logic from sbc_dif_v1_verify (MKP) - Fix offset on app_tag = 0xffff in sbc_dif_verify_read() Cc: Martin K. Petersen Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: Sagi Grimberg Cc: Or Gerlitz Signed-off-by: Nicholas Bellinger