>> +static int virtnet_reset(struct virtnet_info *vi)
>> +{
>> + struct virtio_device *dev = vi->vdev;
>> + int ret;
>> +
>> + virtio_config_disable(dev);
>> + dev->failed = dev->config->get_status(dev) & VIRTIO_CONFIG_S_FAILED;
>> + virtnet_freeze_down(dev, true);
>> + remove_vq_common(vi);
>> +
>> + virtio_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE);
>> + virtio_add_status(dev, VIRTIO_CONFIG_S_DRIVER);
>> +
>> + ret = virtio_finalize_features(dev);
>> + if (ret)
>> + goto err;
>> +
>> + ret = virtnet_restore_up(dev);
>> + if (ret)
>> + goto err;
>> +
>> + ret = virtnet_set_queues(vi, vi->curr_queue_pairs);
>> + if (ret)
>> + goto err;
>> +
>> + virtio_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK);
>> + virtio_config_enable(dev);
>> + return 0;
>> +
>> +err:
>> + virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED);
>> + return ret;
>> +}
>> +
>> static int virtnet_set_guest_offloads(struct virtnet_info *vi, u64 offloads)
>> {
>> struct scatterlist sg;
>
> I have a question here though. How do things like MAC address
> get restored?
>
> What about the rx mode?
>
> vlans?
The function as is releases and reinitializes only ring state.
Device configuration such as mac and vlan persist across
the reset.
> Also, it seems that LINK_ANNOUNCE requests will get ignored
> even if they got set before the reset, leading to downtime.
Do you mean act on VIRTIO_NET_F_GUEST_ANNOUNCE
requests? That flag is tested and netdev_notify_peers
called before resetting virtio ring state.
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