diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2016-07-29 13:19:55 -0400 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2016-08-22 12:23:27 -0400 |
| commit | 7154bbe826f886e16b23564c62ae08591b99c1e7 (patch) | |
| tree | 76ad65088a48b2e53c9a5bd8569fce39adebd2a2 /drivers | |
| parent | 8a7e3694e2d6d06507e2dbdf792caa5973add295 (diff) | |
| download | lwn-7154bbe826f886e16b23564c62ae08591b99c1e7.tar.gz lwn-7154bbe826f886e16b23564c62ae08591b99c1e7.zip | |
dm flakey: error READ bios during the down_interval
[ Upstream commit 99f3c90d0d85708e7401a81ce3314e50bf7f2819 ]
When the corrupt_bio_byte feature was introduced it caused READ bios to
no longer be errored with -EIO during the down_interval. This had to do
with the complexity of needing to submit READs if the corrupt_bio_byte
feature was used.
Fix it so READ bios are properly errored with -EIO; doing so early in
flakey_map() as long as there isn't a match for the corrupt_bio_byte
feature.
Fixes: a3998799fb4df ("dm flakey: add corrupt_bio_byte feature")
Reported-by: Akira Hayakawa <ruby.wktk@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-flakey.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index b257e46876d3..0f5e1820c92d 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -287,10 +287,16 @@ static int flakey_map(struct dm_target *ti, struct bio *bio) pb->bio_submitted = true; /* - * Map reads as normal. + * Map reads as normal only if corrupt_bio_byte set. */ - if (bio_data_dir(bio) == READ) - goto map_bio; + if (bio_data_dir(bio) == READ) { + /* If flags were specified, only corrupt those that match. */ + if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) && + all_corrupt_bio_flags_match(bio, fc)) + goto map_bio; + else + return -EIO; + } /* * Drop writes? @@ -328,12 +334,13 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio, int error) /* * Corrupt successful READs while in down state. - * If flags were specified, only corrupt those that match. */ - if (fc->corrupt_bio_byte && !error && pb->bio_submitted && - (bio_data_dir(bio) == READ) && (fc->corrupt_bio_rw == READ) && - all_corrupt_bio_flags_match(bio, fc)) - corrupt_bio_data(bio, fc); + if (!error && pb->bio_submitted && (bio_data_dir(bio) == READ)) { + if (fc->corrupt_bio_byte) + corrupt_bio_data(bio, fc); + else + return -EIO; + } return error; } |