Re: [PATCH] samples/bpf: Add sample usage for BPF_PROG_TYPE_NETFILTER

[David Wang]

At 2023-09-05 05:01:14, "Alexei Starovoitov" <alexei.starovoitov@xxxxxxxxx> wrote:
>On Mon, Sep 4, 2023 at 3:49 AM Florian Westphal <fw@xxxxxxxxx> wrote:
>>
>> David Wang <00107082@xxxxxxx> wrote:
>> > This sample code implements a simple ipv4
>> > blacklist via the new bpf type BPF_PROG_TYPE_NETFILTER,
>> > which was introduced in 6.4.
>> >
>> > The bpf program drops package if destination ip address
>> > hits a match in the map of type BPF_MAP_TYPE_LPM_TRIE,
>> >
>> > The userspace code would load the bpf program,
>> > attach it to netfilter's FORWARD/OUTPUT hook,
>> > and then write ip patterns into the bpf map.
>>
>> Thanks, I think its good to have this.
>
>Yes, but only in selftests/bpf.
>samples/bpf/ are not tested and bit rot heavily.

Hi Alexei, 

I need to know whether samples/bpf is still a good place to put code. 
I will put the code in another open source project  for bpf samples,  mentioned by Toke.
But I still want to put it in samples/bpf , since the code only compile/work with new kernel.

Need your feedback on this,  could this code be kept in samples/bpf? :)

Thanks
David.