Introduce pass-through block stats

Signed-off-by: Sara Merzel <sara.merzel@huawei.com>
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@huawei.com>

src/engine/engine_pt.c

@@ -87,6 +87,10 @@ int ocf_read_pt_do(struct ocf_request *req)
 
 	/* Update statistics */
 	ocf_engine_update_block_stats(req);
+
+	ocf_core_stats_pt_block_update(req->core, req->part_id, req->rw,
+			req->byte_length);
+
 	ocf_core_stats_request_pt_update(req->core, req->part_id, req->rw,
 			req->info.hit_no, req->core_line_count);