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3 Commits

Author SHA1 Message Date
Mike Snitzer a3998799fb dm flakey: add corrupt_bio_byte feature 
Add corrupt_bio_byte feature to simulate corruption by overwriting a byte at a
specified position with a specified value during intervals when the device is
"down".

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
 2011-08-02 12:32:06 +01:00
Mike Snitzer b26f5e3d71 dm flakey: add drop_writes 
Add 'drop_writes' option to drop writes silently while the
device is 'down'.  Reads are not touched.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
 2011-08-02 12:32:05 +01:00
Josef Bacik 3407ef5262 dm: add flakey target 
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>
 2011-03-24 13:54:24 +00:00