VIRTQUEUE_FLAG_INDIRECT
vq->vq_flags |= VIRTQUEUE_FLAG_INDIRECT;
vq->vq_flags &= ~VIRTQUEUE_FLAG_INDIRECT;
if (vq->vq_flags & VIRTQUEUE_FLAG_INDIRECT)
if (vq->vq_flags & VIRTQUEUE_FLAG_INDIRECT)
if ((vq->vq_flags & VIRTQUEUE_FLAG_INDIRECT) == 0)