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authorChristoph Hellwig <hch@lst.de>2017-06-03 10:38:01 +0300
committerJens Axboe <axboe@fb.com>2017-06-09 18:27:32 +0300
commit14ef1e48269dde9b78efe4b112fa78e9ced72bc1 (patch)
tree473613a63d5f714c0b21b65269a590490899e8cc /drivers/md/dm-mpath.c
parent36ffc6c1c0e67acdacb53348350d0a37206dbadf (diff)
downloadlinux-14ef1e48269dde9b78efe4b112fa78e9ced72bc1.tar.xz
dm mpath: merge do_end_io_bio into multipath_end_io_bio
This simplifies the code and especially the error passing a bit and will help with the next patch. 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 'drivers/md/dm-mpath.c')
-rw-r--r--drivers/md/dm-mpath.c42
1 files changed, 15 insertions, 27 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 3df056b73b66..6d5ebb76149d 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1510,24 +1510,24 @@ static int multipath_end_io(struct dm_target *ti, struct request *clone,
return r;
}
-static int do_end_io_bio(struct multipath *m, struct bio *clone,
- int error, struct dm_mpath_io *mpio)
+static int multipath_end_io_bio(struct dm_target *ti, struct bio *clone, int error)
{
+ struct multipath *m = ti->private;
+ struct dm_mpath_io *mpio = get_mpio_from_bio(clone);
+ struct pgpath *pgpath = mpio->pgpath;
unsigned long flags;
- if (!error)
- return 0; /* I/O complete */
-
- if (noretry_error(error))
- return error;
+ if (!error || noretry_error(error))
+ goto done;
- if (mpio->pgpath)
- fail_path(mpio->pgpath);
+ if (pgpath)
+ fail_path(pgpath);
if (atomic_read(&m->nr_valid_paths) == 0 &&
!test_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags)) {
dm_report_EIO(m);
- return -EIO;
+ error = -EIO;
+ goto done;
}
/* Queue for the daemon to resubmit */
@@ -1539,28 +1539,16 @@ static int do_end_io_bio(struct multipath *m, struct bio *clone,
if (!test_bit(MPATHF_QUEUE_IO, &m->flags))
queue_work(kmultipathd, &m->process_queued_bios);
- return DM_ENDIO_INCOMPLETE;
-}
-
-static int multipath_end_io_bio(struct dm_target *ti, struct bio *clone, int error)
-{
- struct multipath *m = ti->private;
- struct dm_mpath_io *mpio = get_mpio_from_bio(clone);
- struct pgpath *pgpath;
- struct path_selector *ps;
- int r;
-
- BUG_ON(!mpio);
-
- r = do_end_io_bio(m, clone, error, mpio);
- pgpath = mpio->pgpath;
+ error = DM_ENDIO_INCOMPLETE;
+done:
if (pgpath) {
- ps = &pgpath->pg->ps;
+ struct path_selector *ps = &pgpath->pg->ps;
+
if (ps->type->end_io)
ps->type->end_io(ps, &pgpath->path, mpio->nr_bytes);
}
- return r;
+ return error;
}
/*