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authorMilan Broz <mbroz@redhat.com>2007-05-09 02:32:51 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:46 -0700
commit9c89f8be1a7d14aad9d2c3f7d90d7d88f82c61e2 (patch)
tree0e94f77a0d9fda323b12dd4e26f0e08aa2fff7ef
parent6ad36fe2b451cc85cc7b14f4128286759e217124 (diff)
dm crypt: disable barriers
Disable barriers in dm-crypt because of current workqueue processing can reorder requests. This must be addresed later but for now disabling barriers is needed to prevent data corruption. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/md/dm-crypt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index d8121234c34..8527827b24f 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -954,6 +954,9 @@ static int crypt_map(struct dm_target *ti, struct bio *bio,
struct crypt_config *cc = ti->private;
struct crypt_io *io;
+ if (bio_barrier(bio))
+ return -EOPNOTSUPP;
+
io = mempool_alloc(cc->io_pool, GFP_NOIO);
io->target = ti;
io->base_bio = bio;