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authorMikulas Patocka <mpatocka@redhat.com>2009-06-22 10:12:23 +0100
committerAlasdair G Kergon <agk@redhat.com>2009-06-22 10:12:23 +0100
commit647c7db14ef9cacc4ccb3683e206b61f0de6dc2b (patch)
tree4ef2475e295813dcce1123f2c74ba04061db1b7e /drivers/md
parent374bf7e7f6cc38b0483351a2029a97910eadde1b (diff)
dm crypt: support flush
Flush support for dm-crypt target. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-crypt.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 53394e863c7..04db6c4004a 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1132,6 +1132,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto bad_crypt_queue;
}
+ ti->num_flush_requests = 1;
ti->private = cc;
return 0;
@@ -1189,6 +1190,13 @@ static int crypt_map(struct dm_target *ti, struct bio *bio,
union map_info *map_context)
{
struct dm_crypt_io *io;
+ struct crypt_config *cc;
+
+ if (unlikely(bio_empty_barrier(bio))) {
+ cc = ti->private;
+ bio->bi_bdev = cc->dev->bdev;
+ return DM_MAPIO_REMAPPED;
+ }
io = crypt_io_alloc(ti, bio, bio->bi_sector - ti->begin);