static int send_request(struct request_queue *q, struct bio *bio,
struct block_device *bdev, struct tbio_interface *inter,
int writing)
{
struct request *rq;
rq = blk_make_request(q, bio, GFP_KERNEL);
if (!rq) {
prk_err("failed to make request");
return -EFAULT;
}
rq->cmd_len = inter->cmd_len;
if (copy_from_user(rq->cmd, inter->cmd, inter->cmd_len))
goto out_request;
if (sizeof(rq->cmd) != inter->cmd_len) {
memset(rq->cmd + inter->cmd_len, 0,
sizeof(rq->cmd) - inter->cmd_len);
}
rq->__sector = bio->bi_sector;
if (blk_execute_rq(q, bdev->bd_disk, rq, 0))
goto out_request;
blk_put_request(rq);
return 0;
out_request:
blk_put_request(rq);
return -EFAULT;
}
/* return id (s/n) string for *disk to *id_str
*/
static int virtblk_get_id(struct gendisk *disk, char *id_str)
{
struct virtio_blk *vblk = disk->private_data;
struct request *req;
struct bio *bio;
int err;
bio = bio_map_kern(vblk->disk->queue, id_str, VIRTIO_BLK_ID_BYTES,
GFP_KERNEL);
if (IS_ERR(bio))
return PTR_ERR(bio);
req = blk_make_request(vblk->disk->queue, bio, GFP_KERNEL);
if (IS_ERR(req)) {
bio_put(bio);
return PTR_ERR(req);
}
req->cmd_type = REQ_TYPE_DRV_PRIV;
err = blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
blk_put_request(req);
return err;
}
