static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) { VirtIONet *n = VIRTIO_NET(vdev); struct virtio_net_ctrl_hdr ctrl; virtio_net_ctrl_ack status = VIRTIO_NET_ERR; VirtQueueElement elem; size_t s; struct iovec *iov; unsigned int iov_cnt; while (virtqueue_pop(vq, &elem)) { if (iov_size(elem.in_sg, elem.in_num) < sizeof(status) || iov_size(elem.out_sg, elem.out_num) < sizeof(ctrl)) { error_report("virtio-net ctrl missing headers"); exit(1); } iov = elem.out_sg; iov_cnt = elem.out_num; s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl)); iov_discard_front(&iov, &iov_cnt, sizeof(ctrl)); if (s != sizeof(ctrl)) { status = VIRTIO_NET_ERR; } else if (ctrl.class == VIRTIO_NET_CTRL_RX) { status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) { status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) { status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) { status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) { status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt); } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) { status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt); } s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status)); assert(s == sizeof(status)); virtqueue_push(vq, &elem, sizeof(status)); virtio_notify(vdev, vq); } }