On December 28, 2017 8:34:24 PM PST, David Ahern <dsahern@xxxxxxxxx> wrote: >On 12/28/17 9:37 PM, MD I. Islam wrote: >> Hi >> >> Is XDP designed for implementing packet forwarding? Is there an >> example of ipv4 forwarding the kernel? I don't find any example in >> samples/bpf/ directory. > >samples/bpf/xdp_router_ipv4_*.c > >I have a POC on using new helpers that allow BPF programs to leverage >kernel FIB and neighbor tables: > https://github.com/dsahern/linux/commits/bpf/xdp-fwding-wip > >It shows a 400% increase in forwarding. A lot of issues need to be >addressed, but it shows the intent. Nice! What would be uber cool is a NATP fastpath implemented using XDP. Now that eBPF for ARM32 has landed it would enable a lot of platforms. -- Florian
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