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authorMartin K. Petersen <martin.petersen@oracle.com>2008-06-30 20:04:41 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-07-03 13:21:13 +0200
commit7ba1ba12eeef0aa7113beb16410ef8b7c748e18b (patch)
tree4629aabe88bf095d58eabd2f451207695bb35b08 /block/Kconfig
parent51d654e1d885607a6edd02b337105fa5c28b6d33 (diff)
downloadconfigs-7ba1ba12eeef0aa7113beb16410ef8b7c748e18b.tar.gz
block: Block layer data integrity support
Some block devices support verifying the integrity of requests by way of checksums or other protection information that is submitted along with the I/O. This patch implements support for generating and verifying integrity metadata, as well as correctly merging, splitting and cloning bios and requests that have this extra information attached. See Documentation/block/data-integrity.txt for more information. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/Kconfig')
-rw-r--r--block/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/block/Kconfig b/block/Kconfig
index 3e97f2bc446..1ab7c15c8d7 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -81,6 +81,18 @@ config BLK_DEV_BSG
If unsure, say N.
+config BLK_DEV_INTEGRITY
+ bool "Block layer data integrity support"
+ ---help---
+ Some storage devices allow extra information to be
+ stored/retrieved to help protect the data. The block layer
+ data integrity option provides hooks which can be used by
+ filesystems to ensure better data integrity.
+
+ Say yes here if you have a storage device that provides the
+ T10/SCSI Data Integrity Field or the T13/ATA External Path
+ Protection. If in doubt, say N.
+
endif # BLOCK
config BLOCK_COMPAT