From: Alasdair G Kergon <agk@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: dm-devel@redhat.com, linux-kernel@vger.kernel.org,
Milan Broz <mbroz@redhat.com>
Subject: [2.6.22 PATCH 03/26] dm crypt: disable barriers
Date: Tue, 8 May 2007 20:43:52 +0100 [thread overview]
Message-ID: <20070508194352.GJ24114@agk.fab.redhat.com> (raw)
From: Milan Broz <mbroz@redhat.com>
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>
---
drivers/md/dm-crypt.c | 3 +++
1 files changed, 3 insertions(+)
Index: linux-2.6.21/drivers/md/dm-crypt.c
===================================================================
--- linux-2.6.21.orig/drivers/md/dm-crypt.c 2007-05-01 17:38:32.000000000 +0100
+++ linux-2.6.21/drivers/md/dm-crypt.c 2007-05-01 17:40:47.000000000 +0100
@@ -954,6 +954,9 @@ static int crypt_map(struct dm_target *t
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;
reply other threads:[~2007-05-08 19:44 UTC|newest]
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