[dm-devel] [PATCH v2 2/2] dm dust: introduce list badblocks in the rst

[yangerkun]

Since we can list bad blocks with command status, introduce the detail
in the doc.

Signed-off-by: yangerkun <yangerkun at huawei.com>
---
 .../admin-guide/device-mapper/dm-dust.rst          | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/admin-guide/device-mapper/dm-dust.rst b/Documentation/admin-guide/device-mapper/dm-dust.rst
index b6e7e7ead831..9267d9330482 100644
--- a/Documentation/admin-guide/device-mapper/dm-dust.rst
+++ b/Documentation/admin-guide/device-mapper/dm-dust.rst
@@ -205,6 +205,20 @@ appear::
 
         kernel: device-mapper: dust: clearbadblocks: no badblocks found
 
+Listing the bad blocks
+----------------------
+
+After we have add some bad blocks(like block 1 and 2), run the following
+command can help us to check the bad blocks::
+
+        $ sudo dmsetup status dust1
+        0 33552384 dust 252:17 bypass verbose badblocks list: 1 2
+
+And if there is no bad blocks, we will get following results::
+
+        $ sudo dmsetup status dust1
+        0 33552384 dust 252:17 bypass verbose badblocks list: null
+
 Message commands list
 ---------------------
 
-- 
2.25.4