mirror of https://github.com/proxmox/mirror_qemu
virtio-net: remove layout assumptions for mq ctrl
Following commit 921ac5d0f3
(virtio-net:
remove layout assumptions for ctrl vq), this patch makes multiqueue ctrl
handling not rely on the layout of descriptors.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
parent
15054fce2d
commit
f8f7c533e2
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@ -578,13 +578,14 @@ static int virtio_net_handle_vlan_table(VirtIONet *n, uint8_t cmd,
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}
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static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd,
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VirtQueueElement *elem)
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struct iovec *iov, unsigned int iov_cnt)
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{
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struct virtio_net_ctrl_mq s;
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struct virtio_net_ctrl_mq mq;
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size_t s;
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uint16_t queues;
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if (elem->out_num != 2 ||
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elem->out_sg[1].iov_len != sizeof(struct virtio_net_ctrl_mq)) {
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error_report("virtio-net ctrl invalid steering command");
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s = iov_to_buf(iov, iov_cnt, 0, &mq, sizeof(mq));
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if (s != sizeof(mq)) {
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return VIRTIO_NET_ERR;
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}
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@ -592,16 +593,16 @@ static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd,
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return VIRTIO_NET_ERR;
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}
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memcpy(&s, elem->out_sg[1].iov_base, sizeof(struct virtio_net_ctrl_mq));
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queues = lduw_p(&mq.virtqueue_pairs);
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if (s.virtqueue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
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s.virtqueue_pairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX ||
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s.virtqueue_pairs > n->max_queues ||
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if (queues < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN ||
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queues > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX ||
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queues > n->max_queues ||
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!n->multiqueue) {
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return VIRTIO_NET_ERR;
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}
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n->curr_queues = s.virtqueue_pairs;
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n->curr_queues = queues;
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/* stop the backend before changing the number of queues to avoid handling a
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* disabled queue */
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virtio_net_set_status(&n->vdev, n->vdev.status);
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@ -639,7 +640,7 @@ static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
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} else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) {
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status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt);
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} else if (ctrl.class == VIRTIO_NET_CTRL_MQ) {
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status = virtio_net_handle_mq(n, ctrl.cmd, &elem);
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status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt);
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}
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s = iov_from_buf(elem.in_sg, elem.in_num, 0, &status, sizeof(status));
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