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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>
This commit is contained in:
Christoph Hellwig 2017-06-03 09:38:01 +02:00 committed by Jens Axboe
parent 36ffc6c1c0
commit 14ef1e4826
1 changed files with 15 additions and 27 deletions
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42
drivers/md/dm-mpath.c
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@ -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 (!error || noretry_error(error))
goto done;
if (noretry_error(error))
return error;
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;
}
/*