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| author | yangerkun <yangerkun@huawei.com> | 2020-06-19 23:10:39 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-07-20 17:17:34 +0200 |
| commit | 4f7f590b152444c1403ece9eeeddd1e8b22ba04e (patch) | |
| tree | 9fd1f97c1aa5fa2d5ae78c3ba9aa959c3f0f4317 /Documentation/admin-guide/device-mapper | |
| parent | dm verity: add "panic_on_corruption" error handling mode (diff) | |
| download | linux-4f7f590b152444c1403ece9eeeddd1e8b22ba04e.tar.xz linux-4f7f590b152444c1403ece9eeeddd1e8b22ba04e.zip | |
dm dust: report some message results directly back to user
Some messages (queryblock, countbadblocks, removebadblock) are best
reported directly to user directly. Do so with DMEMIT.
[Bryan: maintain __func__ output in DMEMIT messages]
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Bryan Gurney <bgurney@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'Documentation/admin-guide/device-mapper')
| -rw-r--r-- | Documentation/admin-guide/device-mapper/dm-dust.rst | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/Documentation/admin-guide/device-mapper/dm-dust.rst b/Documentation/admin-guide/device-mapper/dm-dust.rst index b6e7e7ead831..cf8079e368de 100644 --- a/Documentation/admin-guide/device-mapper/dm-dust.rst +++ b/Documentation/admin-guide/device-mapper/dm-dust.rst @@ -69,10 +69,11 @@ Create the dm-dust device: $ sudo dmsetup create dust1 --table '0 33552384 dust /dev/vdb1 0 4096' Check the status of the read behavior ("bypass" indicates that all I/O -will be passed through to the underlying device):: +will be passed through to the underlying device; "verbose" indicates that +bad block additions, removals, and remaps will be verbosely logged):: $ sudo dmsetup status dust1 - 0 33552384 dust 252:17 bypass + 0 33552384 dust 252:17 bypass verbose $ sudo dd if=/dev/mapper/dust1 of=/dev/null bs=512 count=128 iflag=direct 128+0 records in @@ -164,7 +165,7 @@ following message command:: A message will print with the number of bad blocks currently configured on the device:: - kernel: device-mapper: dust: countbadblocks: 895 badblock(s) found + countbadblocks: 895 badblock(s) found Querying for specific bad blocks -------------------------------- @@ -176,11 +177,11 @@ following message command:: The following message will print if the block is in the list:: - device-mapper: dust: queryblock: block 72 found in badblocklist + dust_query_block: block 72 found in badblocklist The following message will print if the block is not in the list:: - device-mapper: dust: queryblock: block 72 not found in badblocklist + dust_query_block: block 72 not found in badblocklist The "queryblock" message command will work in both the "enabled" and "disabled" modes, allowing the verification of whether a block @@ -198,12 +199,12 @@ following message command:: After clearing the bad block list, the following message will appear:: - kernel: device-mapper: dust: clearbadblocks: badblocks cleared + dust_clear_badblocks: badblocks cleared If there were no bad blocks to clear, the following message will appear:: - kernel: device-mapper: dust: clearbadblocks: no badblocks found + dust_clear_badblocks: no badblocks found Message commands list --------------------- |