netdev - Re: [bpf-next 00/10] samples/bpf: modernize BPF functionality test programs

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Message-ID: <CAEKGpzgzxabXqUKXz4A-dYx6B05vbDkGELadRDBnbCF_hLxMAQ@mail.gmail.com>
Date:   Mon, 16 Jan 2023 22:01:43 +0900
From:   "Daniel T. Lee" <danieltimlee@...il.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Yonghong Song <yhs@...com>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>, bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>
Subject: Re: [bpf-next 00/10] samples/bpf: modernize BPF functionality test programs

On Mon, Jan 16, 2023 at 6:38 AM Alexei Starovoitov
<alexei.starovoitov@...il.com> wrote:
>
> On Sat, Jan 14, 2023 at 11:16 PM Daniel T. Lee <danieltimlee@...il.com> wrote:
> >
> > Currently, there are many programs under samples/bpf to test the
> > various functionality of BPF that have been developed for a long time.
> > However, the kernel (BPF) has changed a lot compared to the 2016 when
> > some of these test programs were first introduced.
> >
> > Therefore, some of these programs use the deprecated function of BPF,
> > and some programs no longer work normally due to changes in the API.
> >
> > To list some of the kernel changes that this patch set is focusing on,
> > - legacy BPF map declaration syntax support had been dropped [1]
> > - bpf_trace_printk() always append newline at the end [2]
> > - deprecated styled BPF section header (bpf_load style) [3]
> > - urandom_read tracepoint is removed (used for testing overhead) [4]
> > - ping sends packet with SOCK_DGRAM instead of SOCK_RAW [5]*
> > - use "vmlinux.h" instead of including individual headers
> >
> > In addition to this, this patchset tries to modernize the existing
> > testing scripts a bit. And for network-related testing programs,
> > a separate header file was created and applied. (To use the
> > Endianness conversion function from xdp_sample and bunch of constants)
>
> Nice set of cleanups. Applied.
> As a follow up could you convert some of them to proper selftests/bpf ?
> Unfortunately samples/bpf will keep bit rotting despite your herculean efforts.

I really appreciate for your compliment!
I'll try to convert the existing sample to selftest in the next patch.

-- 
Best,
Daniel T. Lee