diff options
| author |   Mike Snitzer <snitzer@redhat.com> | 2016-07-29 13:19:55 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-08-02 16:08:59 -0400 |
| commit | 99f3c90d0d85708e7401a81ce3314e50bf7f2819 (patch) | |
| tree | 97e77eb78fa2f23e30a3279caed0c08af77bdf90 /drivers/md | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux (diff) | |
| download | linux-dev-99f3c90d0d85708e7401a81ce3314e50bf7f2819.tar.xz linux-dev-99f3c90d0d85708e7401a81ce3314e50bf7f2819.zip | |
dm flakey: error READ bios during the down_interval
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
Diffstat (limited to 'drivers/md')
| -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 29b99fb6a16a..19db13e99466 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -289,10 +289,16 @@ 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? @@ -330,12 +336,13 @@ 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; } |