diff options
| author |   Christoph Hellwig <hch@lst.de> | 2017-06-03 09:38:02 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2017-06-09 09:27:32 -0600 |
| commit | 846785e6a5725de4f0788e78e101961566a77d2a (patch) | |
| tree | 4dd5c24f6ebb9e4adb4ab920a6bdd99531e1300c /drivers/md/dm.c | |
| parent | dm mpath: merge do_end_io_bio into multipath_end_io_bio (diff) | |
| download | linux-dev-846785e6a5725de4f0788e78e101961566a77d2a.tar.xz linux-dev-846785e6a5725de4f0788e78e101961566a77d2a.zip | |
dm: don't return errnos from ->map
Instead use the special DM_MAPIO_KILL return value to return -EIO just
like we do for the request based path. Note that dm-log-writes returned
-ENOMEM in a few places, which now becomes -EIO instead. No consumer
treats -ENOMEM special so this shouldn't be an issue (and it should
use a mempool to start with to make guaranteed progress).
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/md/dm.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 6ef9500226c0..499f8209bacf 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1084,18 +1084,24 @@ static void __map_bio(struct dm_target_io *tio) r = ti->type->map(ti, clone); dm_offload_end(&o); - if (r == DM_MAPIO_REMAPPED) { + switch (r) { + case DM_MAPIO_SUBMITTED: + break; + case DM_MAPIO_REMAPPED: /* the bio has been remapped so dispatch it */ - trace_block_bio_remap(bdev_get_queue(clone->bi_bdev), clone, tio->io->bio->bi_bdev->bd_dev, sector); - generic_make_request(clone); - } else if (r < 0 || r == DM_MAPIO_REQUEUE) { + break; + case DM_MAPIO_KILL: + r = -EIO; + /*FALLTHRU*/ + case DM_MAPIO_REQUEUE: /* error the io and bail out, or requeue it if needed */ dec_pending(tio->io, r); free_tio(tio); - } else if (r != DM_MAPIO_SUBMITTED) { + break; + default: DMWARN("unimplemented target map return value: %d", r); BUG(); } |