diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2008-06-30 20:04:41 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-07-03 13:21:13 +0200 |
| commit | 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b (patch) | |
| tree | 4629aabe88bf095d58eabd2f451207695bb35b08 /block/Kconfig | |
| parent | 51d654e1d885607a6edd02b337105fa5c28b6d33 (diff) | |
| download | lwn-7ba1ba12eeef0aa7113beb16410ef8b7c748e18b.tar.gz lwn-7ba1ba12eeef0aa7113beb16410ef8b7c748e18b.zip | |
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/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/block/Kconfig b/block/Kconfig index 3e97f2bc446f..1ab7c15c8d7a 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 |