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[PATCH] device-mapper multipath: Barriers not supported

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dm multipath will report barriers as not supported with this patch.

Signed-off-by: Lars Marowsky-Bree <lmb@suse.de>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Alasdair G Kergon
2005-07-12 15:53:01 -07:00
committed by Linus Torvalds
parent 3f603ed319
commit f6a80ea8ed
3 changed files with 8 additions and 2 deletions
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6
drivers/md/dm-mpath.c
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@@ -765,6 +765,9 @@ static int multipath_map(struct dm_target *ti, struct bio *bio,
struct mpath_io *mpio;
struct multipath *m = (struct multipath *) ti->private;
if (bio_barrier(bio))
return -EOPNOTSUPP;
mpio = mempool_alloc(m->mpio_pool, GFP_NOIO);
dm_bio_record(&mpio->details, bio);
@@ -988,6 +991,9 @@ static int do_end_io(struct multipath *m, struct bio *bio,
if ((error == -EWOULDBLOCK) && bio_rw_ahead(bio))
return error;
if (error == -EOPNOTSUPP)
return error;
spin_lock(&m->lock);
if (!m->nr_valid_paths) {
if (!m->queue_if_no_path || m->suspended) {