mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
3407ef5262
This target is the same as the linear target except that it returns I/O errors periodically. It's been found useful in simulating failing devices for testing purposes. I needed a dm target to do some failure testing on btrfs's raid code, and Mike pointed me at this. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
18 lines
708 B
Plaintext
18 lines
708 B
Plaintext
dm-flakey
|
|
=========
|
|
|
|
This target is the same as the linear target except that it returns I/O
|
|
errors periodically. It's been found useful in simulating failing
|
|
devices for testing purposes.
|
|
|
|
Starting from the time the table is loaded, the device is available for
|
|
<up interval> seconds, then returns errors for <down interval> seconds,
|
|
and then this cycle repeats.
|
|
|
|
Parameters: <dev path> <offset> <up interval> <down interval>
|
|
<dev path>: Full pathname to the underlying block-device, or a
|
|
"major:minor" device-number.
|
|
<offset>: Starting sector within the device.
|
|
<up interval>: Number of seconds device is available.
|
|
<down interval>: Number of seconds device returns errors.
|