virtio-net: implement rx packet queueing
If we don't have room to receive a packet, we return zero
from virtio_net_receive() and call qemu_flush_queued_packets()
as soon as space becomes available.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index 6b34c5a..a3ba890 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -269,6 +269,9 @@
static void virtio_net_handle_rx(VirtIODevice *vdev, VirtQueue *vq)
{
+ VirtIONet *n = to_virtio_net(vdev);
+
+ qemu_flush_queued_packets(n->vc);
}
static int do_virtio_net_can_receive(VirtIONet *n, int bufsize)
@@ -368,7 +371,7 @@
size_t hdr_len, offset, i;
if (!do_virtio_net_can_receive(n, size))
- return -1;
+ return 0;
if (!receive_filter(n, buf, size))
return size;
