*
*/
-static int stripe_status(struct dm_target *ti,
- status_type_t type, char *result, unsigned int maxlen)
+static void stripe_status(struct dm_target *ti, status_type_t type,
+ char *result, unsigned maxlen)
{
struct stripe_c *sc = (struct stripe_c *) ti->private;
char buffer[sc->stripes + 1];
(unsigned long long)sc->stripe[i].physical_start);
break;
}
- return 0;
}
static int stripe_end_io(struct dm_target *ti, struct bio *bio,
blk_limits_io_opt(limits, chunk_size * sc->stripes);
}
+static int stripe_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
+ struct bio_vec *biovec, int max_size)
+{
+ struct stripe_c *sc = ti->private;
+ sector_t bvm_sector = bvm->bi_sector;
+ uint32_t stripe;
+ struct request_queue *q;
+
+ stripe_map_sector(sc, bvm_sector, &stripe, &bvm_sector);
+
+ q = bdev_get_queue(sc->stripe[stripe].dev->bdev);
+ if (!q->merge_bvec_fn)
+ return max_size;
+
+ bvm->bi_bdev = sc->stripe[stripe].dev->bdev;
+ bvm->bi_sector = sc->stripe[stripe].physical_start + bvm_sector;
+
+ return min(max_size, q->merge_bvec_fn(q, bvm, biovec));
+}
+
static struct target_type stripe_target = {
.name = "striped",
- .version = {1, 3, 1},
+ .version = {1, 4, 1},
.module = THIS_MODULE,
.ctr = stripe_ctr,
.dtr = stripe_dtr,
.status = stripe_status,
.iterate_devices = stripe_iterate_devices,
.io_hints = stripe_io_hints,
+ .merge = stripe_merge,
};
int __init dm_stripe_init(void)