req->private_bio->bi_end_io = drbd_request_endio;
req->rq_state = (bio_data_dir(bio_src) == WRITE ? RQ_WRITE : 0)
- | (bio_op(bio_src) == REQ_OP_WRITE_SAME ? RQ_WSAME : 0)
| (bio_op(bio_src) == REQ_OP_WRITE_ZEROES ? RQ_ZEROES : 0)
| (bio_op(bio_src) == REQ_OP_DISCARD ? RQ_UNMAP : 0);
req->device = device;