[dm-devel] [PATCH v4 4/4] dm dust: introduce listbadblocks in the rst

[Bryan Gurney]

From: yangerkun <yangerkun at huawei.com>

From: yangerkun <yangerkun at huawei.com>

Since we support the listbadblocks command, introduce the detail in the
doc.

[Bryan: formatting and wording fixes]

Signed-off-by: yangerkun <yangerkun at huawei.com>
Signed-off-by: Bryan Gurney <bgurney at redhat.com>
---
 .../admin-guide/device-mapper/dm-dust.rst       | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/admin-guide/device-mapper/dm-dust.rst b/Documentation/admin-guide/device-mapper/dm-dust.rst
index cf8079e368de..e35ec8cd2f88 100644
--- a/Documentation/admin-guide/device-mapper/dm-dust.rst
+++ b/Documentation/admin-guide/device-mapper/dm-dust.rst
@@ -206,6 +206,22 @@ appear::
 
         dust_clear_badblocks: no badblocks found
 
+Listing the bad block list
+--------------------------
+
+To list all bad blocks in the bad block list (using an example device
+with blocks 1 and 2 in the bad block list), run the following message
+command::
+
+        $ sudo dmsetup message dust1 0 listbadblocks
+        1
+        2
+
+If there are no bad blocks in the bad block list, the command will
+execute with no output::
+
+        $ sudo dmsetup message dust1 0 listbadblocks
+
 Message commands list
 ---------------------
 
@@ -224,6 +240,7 @@ Single argument message commands::
 
         countbadblocks
         clearbadblocks
+        listbadblocks
         disable
         enable
         quiet
-- 
2.25.4