diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2012-12-21 20:23:41 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-12-21 20:23:41 +0000 |
| commit | 45e621d45e24ffc4cb2b2935e8438987b860063a (patch) | |
| tree | 96c49f06c5bb6b2f6f8d01dc354d59202a7954a5 | |
| parent | 7de3ee57da4b717050e79c9313a9bf66ccc72519 (diff) | |
| download | blackbird-obmc-linux-45e621d45e24ffc4cb2b2935e8438987b860063a.tar.gz blackbird-obmc-linux-45e621d45e24ffc4cb2b2935e8438987b860063a.zip | |
dm stripe: add WRITE SAME support
Rename stripe_map_discard to stripe_map_range and reuse it for WRITE
SAME bio processing.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
| -rw-r--r-- | drivers/md/dm-stripe.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index 6b0e5ea38027..c89cde86d400 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -162,6 +162,7 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->num_flush_requests = stripes; ti->num_discard_requests = stripes; + ti->num_write_same_requests = stripes; sc->chunk_size = chunk_size; if (chunk_size & (chunk_size - 1)) @@ -251,8 +252,8 @@ static void stripe_map_range_sector(struct stripe_c *sc, sector_t sector, *result += sc->chunk_size; /* next chunk */ } -static int stripe_map_discard(struct stripe_c *sc, struct bio *bio, - uint32_t target_stripe) +static int stripe_map_range(struct stripe_c *sc, struct bio *bio, + uint32_t target_stripe) { sector_t begin, end; @@ -283,10 +284,11 @@ static int stripe_map(struct dm_target *ti, struct bio *bio) bio->bi_bdev = sc->stripe[target_request_nr].dev->bdev; return DM_MAPIO_REMAPPED; } - if (unlikely(bio->bi_rw & REQ_DISCARD)) { + if (unlikely(bio->bi_rw & REQ_DISCARD) || + unlikely(bio->bi_rw & REQ_WRITE_SAME)) { target_request_nr = dm_bio_get_target_request_nr(bio); BUG_ON(target_request_nr >= sc->stripes); - return stripe_map_discard(sc, bio, target_request_nr); + return stripe_map_range(sc, bio, target_request_nr); } stripe_map_sector(sc, bio->bi_sector, &stripe, &bio->bi_sector); |
