On 8/7/19 6:36 AM, Jesper Dangaard Brouer wrote:
> Make it clear that this XDP program depend on the network
> stack to do the ARP resolution. This is connected with the
> BPF_FIB_LKUP_RET_NO_NEIGH return code from bpf_fib_lookup().
>
> Another common mistake (seen via XDP-tutorial) is that users
> don't realize that sysctl net.ipv{4,6}.conf.all.forwarding
> setting is honored by bpf_fib_lookup.
>
> Reported-by: Anton Protopopov <[email protected]>
> Signed-off-by: Jesper Dangaard Brouer <[email protected]>
> ---
> samples/bpf/xdp_fwd_kern.c | 19 +++++++++++++++++--
> 1 file changed, 17 insertions(+), 2 deletions(-)
>
Reviewed-by: David Ahern <[email protected]>
