dm-crypt-flush.patch
Flush support for dm-crypt target.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
---
drivers/md/dm-crypt.c | 7 +++++++
1 file changed, 7 insertions(+)
Index: linux-2.6.30-rc1-devel/drivers/md/dm-crypt.c
===================================================================
--- linux-2.6.30-rc1-devel.orig/drivers/md/dm-crypt.c 2009-04-10 06:28:45.000000000 +0200
+++ linux-2.6.30-rc1-devel/drivers/md/dm-crypt.c 2009-04-10 06:33:42.000000000 +0200
@@ -1168,6 +1168,7 @@ static int crypt_ctr(struct dm_target *t
goto bad_crypt_queue;
}
+ ti->num_flush_requests = 1;
ti->private = cc;
return 0;
@@ -1226,6 +1227,12 @@ static int crypt_map(struct dm_target *t
{
struct dm_crypt_io *io;
+ if (unlikely(bio_empty_barrier(bio))) {
+ struct crypt_config *cc = ti->private;
+ bio->bi_bdev = cc->dev->bdev;
+ return DM_MAPIO_REMAPPED;
+ }
+
io = crypt_io_alloc(ti, bio, bio->bi_sector - ti->begin);
if (bio_data_dir(io->base_bio) == READ)
--
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