On Tue, Aug 15, 2017 at 10:18:41PM +0000, Dexuan Cui wrote:
> +static u32 hvs_get_local_cid(void)
> +{
> + return VMADDR_CID_ANY;
> +}
Interesting concept: the guest never knows its CID. This is nice from a
live migration perspective. Currently VMCI and virtio adjust listen
socket local CIDs after migration.
> +static bool hvs_stream_allow(u32 cid, u32 port)
> +{
> + static const u32 valid_cids[] = {
> + VMADDR_CID_ANY,
Is this for loopback?
> + VMADDR_CID_HOST,
> + };
> + int i;
> +
> + /* The host's port range [MIN_HOST_EPHEMERAL_PORT, 0xFFFFFFFF) is
> + * reserved as ephemeral ports, which are used as the host's ports
> + * when the host initiates connections.
> + */
> + if (port > MAX_HOST_LISTEN_PORT)
> + return false;
Without this if statement the guest will attempt to connect. I guess
there will be no listen sockets above MAX_HOST_LISTEN_PORT, so the
connection attempt will fail.
...but hardcode this knowledge into the guest driver?
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