block: Data integrity infrastructure documentation

[safe/jmp/linux-2.6] / Documentation / ABI / testing / sysfs-block

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index 4bd9ea5..44f52a4 100644 (file)
--- 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.