Shuhei Matsumoto f4a62a3993 dif: Add spdk_dif_remap_ref_tag to remap ref. tag for extended LBA payload ... When using stacked virtual bdev (e.g. split virtual bdev), block address space will be remapped during I/O processing and so reference tag will have to be remapped accordingly. The use case is explained in detail as follows: - Format a single NVMe SSD with DIF enabled. - Create a NVMe bdev on the NVMe SSD with DIF enabled. - Create four split vbdevs on the NVMe bdev. - Add the split vbdevs to a NVMe-oF target. - Application is aware of block address space of the split vbdevs. - Application submits read/write I/O to the NVMe-oF target. Case 1: - Configure NVMe-oF target to DIF pass-through. Case 2: - Configure NVMe-oF target to DIF insert/strip For the case 1, - Application inserts DIF for write I/O and verifies DIF for read I/O. - The split vbdevs remaps reference tags of DIF both for read and write I/O because application expects reference tags are based on the block address space of split vbdevs. - The NVMe bdev processs read/write I/Os without remapping reference tags because reference tags are already based on the block address space of the NVMe bdev. For the case 2, - NVMe-oF target inserts DIF for write I/O, and verifies and strips DIF or read I/O. - The split vbdevs remaps reference tags of DIF both for read and write I/O because NVMe-oF target expects reference tags are based on the block address space of split vbdevs. - The NVMe bdev processs read/write I/Os without remapping reference tags because reference tags are already based on the block address space of the NVMe bdev. This patch adds two APIs, spdk_dif_ctx_set_remapped_init_ref_tag and spdk_dif_remap_ref_tag to satisfy the use case. UT code is added together in this patch. Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Change-Id: Ib3101129225b334d2f578eab75197790b1818770 Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/461103 Reviewed-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>		2019-07-11 11:14:22 +00:00
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base64.c	util/base64: add base64 lib and unit tests	2018-07-19 00:50:54 +00:00
bit_array.c	util/bit_array: switch to spdk_*malloc().	2019-04-09 06:30:42 +00:00
cpuset.c	cpuset: Expose internal of struct spdk_cpuset in header file	2019-07-04 00:30:22 +00:00
crc16.c	util: fix crc16 build	2019-03-11 01:41:35 +00:00
crc32_ieee.c	util: add CRC32 utility functions	2017-08-02 19:47:35 -04:00
crc32.c	Update spdk crc32.c with ARM CRC32 intrinsics	2019-01-29 18:23:01 +00:00
crc32c.c	util: Move architecture detection to crc32c.c	2019-02-04 19:14:22 +00:00
dif.c	dif: Add spdk_dif_remap_ref_tag to remap ref. tag for extended LBA payload	2019-07-11 11:14:22 +00:00
fd.c	util/fd: drop fallback from spdk_fd_get_blocklen()	2017-08-11 19:36:30 -04:00
file.c	util: add a new file operation API	2019-05-15 18:54:27 +00:00
Makefile	util: add a new file operation API	2019-05-15 18:54:27 +00:00
strerror_tls.c	util: add spdk_strerror() wrapper with TLS support	2018-01-04 15:00:09 -05:00
string.c	lib/util: fix spdk_strerror() empty string return	2019-07-10 08:29:21 +00:00
uuid.c	util/uuid: add a new uuid copy API.	2018-12-06 22:25:09 +00:00