Commit 0c6c987f authored Oct 09, 2018 by Nikolay Borisov Committed by Jonathan Corbet Oct 12, 2018

dm flakey: Document "error_writes" feature



Commit ef548c55 ("dm flakey: introduce "error_writes" feature")
added the ability to dm flakey to error out writes in contrast to
silently dropping it with 'drop_writes'. Unfortunately this feature
is not currently documented and one has to be either familiar with the
source code of dm flakey or check out xfstests sources to know of
this parameter. So document it.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

parent bc0e5262

Documentation/device-mapper/dm-flakey.txt

+4 −0

Original line number	Diff line number	Diff line
		@@ -33,6 +33,10 @@ Optional feature parameters:
		All write I/O is silently ignored.
		Read I/O is handled correctly.

		error_writes:
		All write I/O is failed with an error signalled.
		Read I/O is handled correctly.

		corrupt_bio_byte <Nth_byte> <direction> <value> <flags>:
		During <down interval>, replace <Nth_byte> of the data of
		each matching bio with <value>.