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Re: [Qemu-devel] [PATCH v6 3/4] contrib/libvhost-user: enable virtio con
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH v6 3/4] contrib/libvhost-user: enable virtio config space messages |
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Date: |
Mon, 11 Dec 2017 13:59:42 +0000 |
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User-agent: |
Mutt/1.9.1 (2017-09-22) |
On Tue, Dec 05, 2017 at 02:27:18PM +0800, Changpeng Liu wrote:
> @@ -798,6 +801,70 @@ vu_set_slave_req_fd(VuDev *dev, VhostUserMsg *vmsg)
> }
>
> static bool
> +vu_get_config(VuDev *dev, VhostUserMsg *vmsg)
> +{
> + int ret = -1;
> +
> + if (dev->iface->get_config) {
> + ret = dev->iface->get_config(dev, vmsg->payload.config.region,
> + vmsg->payload.config.size);
> + }
> +
> + if (ret) {
> + /* resize to zero to indicate an error to master */
> + vmsg->size = 0;
> + }
Please document this error case in vhost-user.txt. I don't remember
reading about it.
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