aboutsummaryrefslogtreecommitdiff
path: root/drivers/md/dm-mpath.c
diff options
context:
space:
mode:
authorAlasdair G Kergon <agk@redhat.com>2005-07-12 15:53:01 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-12 16:19:10 -0700
commitf6a80ea8ed44de0b19c42d41928be37a186a3f41 (patch)
tree2e565669d042e54576a4beaba03145ea35ec2145 /drivers/md/dm-mpath.c
parent3f603ed319d5120e883e64ac5967b2fc848fc43b (diff)
downloadlinux-2.6.34-ux500-f6a80ea8ed44de0b19c42d41928be37a186a3f41.tar.gz
[PATCH] device-mapper multipath: Barriers not supported
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>
Diffstat (limited to 'drivers/md/dm-mpath.c')
-rw-r--r--drivers/md/dm-mpath.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 0c1b8520ef8..84cdb700a24 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -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) {