diff options
| -rw-r--r-- | drivers/md/dm-snap.c | 2 | ||||
| -rw-r--r-- | drivers/md/dm-stripe.c | 4 | ||||
| -rw-r--r-- | drivers/md/dm.c | 3 | ||||
| -rw-r--r-- | include/linux/device-mapper.h | 14 |
4 files changed, 15 insertions, 8 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 5e88bc437be0..b7e179cdc5af 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -1682,7 +1682,7 @@ static int snapshot_merge_map(struct dm_target *ti, struct bio *bio, chunk_t chunk; if (bio->bi_rw & REQ_FLUSH) { - if (!map_context->target_request_nr) + if (!dm_bio_get_target_request_nr(bio)) bio->bi_bdev = s->origin->bdev; else bio->bi_bdev = s->cow->bdev; diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index e2f876539743..4e7ba82146c0 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -279,13 +279,13 @@ static int stripe_map(struct dm_target *ti, struct bio *bio, unsigned target_request_nr; if (bio->bi_rw & REQ_FLUSH) { - target_request_nr = map_context->target_request_nr; + target_request_nr = dm_bio_get_target_request_nr(bio); BUG_ON(target_request_nr >= sc->stripes); bio->bi_bdev = sc->stripe[target_request_nr].dev->bdev; return DM_MAPIO_REMAPPED; } if (unlikely(bio->bi_rw & REQ_DISCARD)) { - target_request_nr = map_context->target_request_nr; + 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); } diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 2765cf2ba0ff..5ee580b4f330 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1099,6 +1099,7 @@ static struct dm_target_io *alloc_tio(struct clone_info *ci, tio->io = ci->io; tio->ti = ti; memset(&tio->info, 0, sizeof(tio->info)); + tio->target_request_nr = 0; return tio; } @@ -1109,7 +1110,7 @@ static void __issue_target_request(struct clone_info *ci, struct dm_target *ti, struct dm_target_io *tio = alloc_tio(ci, ti, ci->bio->bi_max_vecs); struct bio *clone = &tio->clone; - tio->info.target_request_nr = request_nr; + tio->target_request_nr = request_nr; /* * Discard requests require the bio's inline iovecs be initialized. diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 6f0e73b4a80d..eb96ef6fd8b7 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -23,7 +23,6 @@ typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t; union map_info { void *ptr; unsigned long long ll; - unsigned target_request_nr; }; /* @@ -193,20 +192,21 @@ struct dm_target { * A number of zero-length barrier requests that will be submitted * to the target for the purpose of flushing cache. * - * The request number will be placed in union map_info->target_request_nr. + * The request number can be accessed with dm_bio_get_target_request_nr. * It is a responsibility of the target driver to remap these requests * to the real underlying devices. */ unsigned num_flush_requests; /* - * The number of discard requests that will be submitted to the - * target. map_info->request_nr is used just like num_flush_requests. + * The number of discard requests that will be submitted to the target. + * The request number can be accessed with dm_bio_get_target_request_nr. */ unsigned num_discard_requests; /* * The number of WRITE SAME requests that will be submitted to the target. + * The request number can be accessed with dm_bio_get_target_request_nr. */ unsigned num_write_same_requests; @@ -263,6 +263,7 @@ struct dm_target_io { struct dm_io *io; struct dm_target *ti; union map_info info; + unsigned target_request_nr; struct bio clone; }; @@ -276,6 +277,11 @@ static inline struct bio *dm_bio_from_per_bio_data(void *data, size_t data_size) return (struct bio *)((char *)data + data_size + offsetof(struct dm_target_io, clone)); } +static inline unsigned dm_bio_get_target_request_nr(const struct bio *bio) +{ + return container_of(bio, struct dm_target_io, clone)->target_request_nr; +} + int dm_register_target(struct target_type *t); void dm_unregister_target(struct target_type *t); |