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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>
This commit is contained in:
Mikulas Patocka 2009-06-22 10:12:23 +01:00 committed by Alasdair G Kergon
parent 374bf7e7f6
commit 647c7db14e
1 changed files with 8 additions and 0 deletions
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8
drivers/md/dm-crypt.c
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@ -1132,6 +1132,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto bad_crypt_queue; goto bad_crypt_queue;
} }
ti->num_flush_requests = 1;
ti->private = cc; ti->private = cc;
return 0; return 0;
@ -1189,6 +1190,13 @@ static int crypt_map(struct dm_target *ti, struct bio *bio,
union map_info *map_context) union map_info *map_context)
{ {
struct dm_crypt_io *io; 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); io = crypt_io_alloc(ti, bio, bio->bi_sector - ti->begin);