Merge tag 'linux-kselftest-kunit-5.15-rc1' of git://git.kernel.org/pub/scm/linux...

[linux-2.6-microblaze.git] / Documentation / ABI / testing / sysfs-block

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index e34cdee..a0ed873 100644 (file)
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -28,6 +28,18 @@ Description:
                For more details refer Documentation/admin-guide/iostats.rst
 
 
+What:          /sys/block/<disk>/diskseq
+Date:          February 2021
+Contact:       Matteo Croce <mcroce@microsoft.com>
+Description:
+               The /sys/block/<disk>/diskseq files reports the disk
+               sequence number, which is a monotonically increasing
+               number assigned to every drive.
+               Some devices, like the loop device, refresh such number
+               every time the backing file is changed.
+               The value type is 64 bit unsigned.
+
+
 What:          /sys/block/<disk>/<part>/stat
 Date:          February 2008
 Contact:       Jerome Marchand <jmarchan@redhat.com>