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Commit b79f10ee authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Mike Snitzer
Browse files

dm mpath: merge do_end_io into multipath_end_io 



This simplifies the I/O completion path a bit.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 7e25a760

drivers/md/dm-mpath.c

+17 −34
Original line number Diff line number Diff line
@@ -1464,12 +1464,12 @@ static int noretry_error(int error) 
	return 0;

}



/*

 * end_io handling

 */

static int do_end_io(struct multipath *m, struct request *clone,

		     int error, struct dm_mpath_io *mpio)

static int multipath_end_io(struct dm_target *ti, struct request *clone,

			    int error, union map_info *map_context)

{

	struct dm_mpath_io *mpio = get_mpio(map_context);

	struct pgpath *pgpath = mpio->pgpath;



	/*

	 * We don't queue any clone request inside the multipath target

	 * during end I/O handling, since those clone requests don't have
@@ -1481,44 +1481,27 @@ static int do_end_io(struct multipath *m, struct request *clone, 
	 * request into dm core, which will remake a clone request and

	 * clone bios for it and resubmit it later.

	 */

	int r = DM_ENDIO_REQUEUE;



	if (!error)

		return 0;	/* I/O complete */

	if (error && !noretry_error(error)) {

		struct multipath *m = ti->private;



	if (noretry_error(error))

		return error;

		error = DM_ENDIO_REQUEUE;



	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))

		r = dm_report_EIO(m);



	return r;

			error = dm_report_EIO(m);

	}



static int multipath_end_io(struct dm_target *ti, struct request *clone,

			    int error, union map_info *map_context)

{

	struct multipath *m = ti->private;

	struct dm_mpath_io *mpio = get_mpio(map_context);

	struct pgpath *pgpath;

	struct path_selector *ps;

	int r;



	BUG_ON(!mpio);



	r = do_end_io(m, clone, error, mpio);

	pgpath = mpio->pgpath;

	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;

}



static int do_end_io_bio(struct multipath *m, struct bio *clone,