Hi Hangbin,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on bpf-next/master]
[also build test WARNING on net-next/master next-20200525]
[cannot apply to bpf/master net/master linus/master v5.7-rc7]
[if your patch is applied to the wrong git tree, please drop us
This patch is for xdp multicast support. In this implementation we
add a new helper to accept two maps: forward map and exclude map.
We will redirect the packet to all the interfaces in *forward map*, but
exclude the interfaces that in *exclude map*.
To achive this I add a new ex_map for struct bp
