static long vhost_test_run()

in test.c [174:223]

• 37 lines of code
• 9 McCabe index (conditional complexity)

static long vhost_test_run(struct vhost_test *n, int test)
{
	void *priv, *oldpriv;
	struct vhost_virtqueue *vq;
	int r, index;

	if (test < 0 || test > 1)
		return -EINVAL;

	mutex_lock(&n->dev.mutex);
	r = vhost_dev_check_owner(&n->dev);
	if (r)
		goto err;

	for (index = 0; index < n->dev.nvqs; ++index) {
		/* Verify that ring has been setup correctly. */
		if (!vhost_vq_access_ok(&n->vqs[index])) {
			r = -EFAULT;
			goto err;
		}
	}

	for (index = 0; index < n->dev.nvqs; ++index) {
		vq = n->vqs + index;
		mutex_lock(&vq->mutex);
		priv = test ? n : NULL;

		/* start polling new socket */
		oldpriv = vhost_vq_get_backend(vq);
		vhost_vq_set_backend(vq, priv);

		r = vhost_vq_init_access(&n->vqs[index]);

		mutex_unlock(&vq->mutex);

		if (r)
			goto err;

		if (oldpriv) {
			vhost_test_flush_vq(n, index);
		}
	}

	mutex_unlock(&n->dev.mutex);
	return 0;

err:
	mutex_unlock(&n->dev.mutex);
	return r;
}