From: Mike Snitzer Date: Fri, 21 Dec 2012 20:23:41 +0000 (+0000) Subject: dm stripe: add WRITE SAME support X-Git-Tag: v3.8-rc1~3^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=45e621d45e24ffc4cb2b2935e8438987b860063a;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git 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 Signed-off-by: Alasdair G Kergon --- diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index 6b0e5ea..c89cde8 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);