dm: add documentation of sysfs interface
Describe attributes provided by device-mapper in /sys/block.
Signed-off-by: Milan Broz <mbroz@redhat.com>
---
Documentation/ABI/testing/sysfs-block-dm | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-block-dm
diff --git a/Documentation/ABI/testing/sysfs-block-dm b/Documentation/ABI/testing/sysfs-block-dm
new file mode 100644
index 0000000..87ca569
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-block-dm
@@ -0,0 +1,25 @@
+What: /sys/block/dm-<num>/dm/name
+Date: January 2009
+KernelVersion: 2.6.29
+Contact: dm-devel@redhat.com
+Description: Device-mapper device name.
+ Read-only string containing mapped device name.
+Users: util-linux, device-mapper udev rules
+
+What: /sys/block/dm-<num>/dm/uuid
+Date: January 2009
+KernelVersion: 2.6.29
+Contact: dm-devel@redhat.com
+Description: Device-mapper device UUID.
+ Read-only string containing DM-UUID or empty string
+ if DM-UUID is not set.
+Users: util-linux, device-mapper udev rules
+
+What: /sys/block/dm-<num>/dm/suspended
+Date: June 2009
+KernelVersion: 2.6.31
+Contact: dm-devel@redhat.com
+Description: Device-mapper device suspend state.
+ Contains the value 1 while the device is suspended.
+ Otherwise it contains 0. Read-only attribute.
+Users: util-linux, device-mapper udev rules
--
1.7.5.4
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