block: Data integrity infrastructure documentation

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index 4bd9ea539129..44f52a4f5903 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -26,3 +26,37 @@ Description:
                 I/O statistics of partition <part>. The format is the
                 same as the above-written /sys/block/<disk>/stat
                 format.
+
+
+What:           /sys/block/<disk>/integrity/format
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Metadata format for integrity capable block device.
+                E.g. T10-DIF-TYPE1-CRC.
+
+
+What:           /sys/block/<disk>/integrity/read_verify
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Indicates whether the block layer should verify the
+                integrity of read requests serviced by devices that
+                support sending integrity metadata.
+
+
+What:           /sys/block/<disk>/integrity/tag_size
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Number of bytes of integrity tag space available per
+                512 bytes of data.
+
+
+What:           /sys/block/<disk>/integrity/write_generate
+Date:           June 2008
+Contact:        Martin K. Petersen <martin.petersen@oracle.com>
+Description:
+                Indicates whether the block layer should automatically
+                generate checksums for write requests bound for
+                devices that support receiving integrity metadata.