Efficient and Flexible Virtual Machine Networking Through eBPF

This talk will seek the method to build VM networking infrastructure through eBPF. Traditional networking datapath and several limitations of it will be reviewed first . Then eBPF based method will be …

This talk will seek the method to build VM networking infrastructure through eBPF. Traditional networking datapath and several limitations of it will be reviewed first . Then eBPF based method will be introduced: eBPF based filtering allows a user configurable high speed packet filtering solution like virtio-net filter for vhost; eBPF based packet steering allows userspace to inject its own steering policy like RSS; eBPF/XDP based host datapth acceleration allow userspace to build a flexible and efficient datapath on host; eBPF offloading allow guest to offload eBPF tasks like XDP and tc_cls to host for a native packet processing on host. At the end, the performance numbers, challenges and future work will be also discussed.