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block: Add T10 Protection Information functions

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The T10 Protection Information format is also used by some devices that
do not go through the SCSI layer (virtual block devices, NVMe). Relocate
the relevant functions to a block layer library that can be used without
involving SCSI.

Signed-off-by: Martin K. Petersen <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Martin K. Petersen 2014-09-26 19:20:07 -04:00 • committed by Jens Axboe
commit 2341c2f8c3
7 changed files with 245 additions and 226 deletions
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block/Kconfig
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@ -77,6 +77,7 @@ config BLK_DEV_BSGLIB
config BLK_DEV_INTEGRITY
bool "Block layer data integrity support"
select CRC_T10DIF if BLK_DEV_INTEGRITY
---help---
Some storage devices allow extra information to be
stored/retrieved to help protect the data. The block layer