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dm dust: add interface to list all badblocks

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This interface may help anyone who want to know all badblocks without
querying for each block.

[Bryan: DMEMIT message if no blocks are in the bad block list.]

Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Bryan Gurney <bgurney@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
yangerkun
2020-06-19 17:12:42 -04:00
committed by Mike Snitzer
parent 4f7f590b15
commit 0c248ea27f
2 changed files with 44 additions and 0 deletions
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17
Documentation/admin-guide/device-mapper/dm-dust.rst
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@@ -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