I am looking through the virtio-net code in KVM-88. Trace along the data send flow, I only find the code, responsible for getting data from GuestOS's virtqueue and put it on VLAN packet send queue. But when I try to find when the packet sent to tap device, which use writev deliver data to host network, I am lost. Following is the main functions called sequence I collect. 1.virtio_net_handle_tx -- the entry handler for send data 2. virtio_queue_set_notification -- mainly for notify switcher 3.virtio_net_flush_tx -- the really tx function 4.virtqueue_pop -- map data packet address in guest os 5.qemu_sendv_packet_async -- put the data into VLAN 6.qemu_enqueue_packet_iov -- copy sg data to packet struct 7.qemu_deliver_packet_iov -- traverse the VLAN send queue, and callback function (receive) called. Then where is callback function register? Is it the function virtio_net_receive ? If so, I found none code about calling tap device write. Thanks, -- BestRegards. YangLiang _____________________________________________ Department of Computer Science . School of Electronics Engineering & Computer Science . _____________________________________________ -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
