Waiting for any tips. Welcome all views. On Tue, Apr 27, 2010 at 7:10 PM, Liang YANG <brinewsor@xxxxxxxxx> wrote: > 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 . > _____________________________________________ > -- 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
