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From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Martin KaFai Lau <kafai@fb.com>, Eric Dumazet <eric.dumazet@gmail.com>
Cc: bpf <bpf@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Eric Dumazet <edumazet@google.com>,
	Kernel Team <kernel-team@fb.com>,
	Neal Cardwell <ncardwell@google.com>,
	Network Development <netdev@vger.kernel.org>,
	Yonghong Song <yhs@fb.com>, Yuchung Cheng <ycheng@google.com>
Subject: Re: [PATCH v2 bpf-next 0/8] bpf: Allow bpf tcp iter to do bpf_(get|set)sockopt
Date: Tue, 20 Jul 2021 11:05:02 -0700	[thread overview]
Message-ID: <CAADnVQ+RYgHYO=aJwoh7C_=CeX+nwYopb+pk=Pp709Z-WwQnPw@mail.gmail.com> (raw)
In-Reply-To: <CAADnVQ+Y4YFoctqKjFMgx1OXknAttup10npCEc1d1kjrQVp40w@mail.gmail.com>

On Wed, Jul 14, 2021 at 6:29 PM Alexei Starovoitov
<alexei.starovoitov@gmail.com> wrote:
>
> On Thu, Jul 1, 2021 at 1:05 PM Martin KaFai Lau <kafai@fb.com> wrote:
> >
> > This set is to allow bpf tcp iter to call bpf_(get|set)sockopt.
> >
> > With bpf-tcp-cc, new algo rollout happens more often.  Instead of
> > restarting the applications to pick up the new tcp-cc, this set
> > allows the bpf tcp iter to call bpf_(get|set)sockopt(TCP_CONGESTION).
> > It is not limited to TCP_CONGESTION, the bpf tcp iter can call
> > bpf_(get|set)sockopt() with other options.  The bpf tcp iter can read
> > into all the fields of a tcp_sock, so there is a lot of flexibility
> > to select the desired sk to do setsockopt(), e.g. it can test for
> > TCP_LISTEN only and leave the established connections untouched,
> > or check the addr/port, or check the current tcp-cc name, ...etc.
> >
> > Patch 1-4 are some cleanup and prep work in the tcp and bpf seq_file.
> >
> > Patch 5 is to have the tcp seq_file iterate on the
> > port+addr lhash2 instead of the port only listening_hash.
> ...
> >  include/linux/bpf.h                           |   8 +
> >  include/net/inet_hashtables.h                 |   6 +
> >  include/net/tcp.h                             |   1 -
> >  kernel/bpf/bpf_iter.c                         |  22 +
> >  kernel/trace/bpf_trace.c                      |   7 +-
> >  net/core/filter.c                             |  34 ++
> >  net/ipv4/tcp_ipv4.c                           | 410 ++++++++++++++----
>
> Eric,
>
> Could you please review this set where it touches inet bits?
> I've looked a few times and it all looks fine to me, but I'm no expert
> in those parts.

Eric,

ping!
If you're on vacation or something I'm inclined to land the patches
and let Martin address your review feedback in follow up patches.

Thanks

  reply	other threads:[~2021-07-20 18:08 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-01 20:05 Martin KaFai Lau
2021-07-01 20:05 ` [PATCH v2 bpf-next 1/8] tcp: seq_file: Avoid skipping sk during tcp_seek_last_pos Martin KaFai Lau
2021-07-22 14:16   ` Kuniyuki Iwashima
2021-07-22 15:08     ` Kuniyuki Iwashima
2021-07-22 21:42       ` Martin KaFai Lau
2021-07-22 22:06         ` Kuniyuki Iwashima
2021-07-01 20:05 ` [PATCH v2 bpf-next 2/8] tcp: seq_file: Refactor net and family matching Martin KaFai Lau
2021-07-01 20:05 ` [PATCH v2 bpf-next 3/8] bpf: tcp: seq_file: Remove bpf_seq_afinfo from tcp_iter_state Martin KaFai Lau
2021-07-01 20:06 ` [PATCH v2 bpf-next 4/8] tcp: seq_file: Add listening_get_first() Martin KaFai Lau
2021-07-01 20:06 ` [PATCH v2 bpf-next 5/8] tcp: seq_file: Replace listening_hash with lhash2 Martin KaFai Lau
2021-07-01 20:06 ` [PATCH v2 bpf-next 6/8] bpf: tcp: bpf iter batching and lock_sock Martin KaFai Lau
2021-07-01 20:06 ` [PATCH v2 bpf-next 7/8] bpf: tcp: Support bpf_(get|set)sockopt in bpf tcp iter Martin KaFai Lau
2021-07-01 20:06 ` [PATCH v2 bpf-next 8/8] bpf: selftest: Test batching and " Martin KaFai Lau
2021-07-02 10:50 ` [PATCH v2 bpf-next 0/8] bpf: Allow bpf tcp iter to do bpf_(get|set)sockopt David Laight
2021-07-06 15:44   ` Martin KaFai Lau
2021-07-15  1:29 ` Alexei Starovoitov
2021-07-20 18:05   ` Alexei Starovoitov [this message]
2021-07-20 18:42     ` Eric Dumazet
2021-07-22 13:25 ` Eric Dumazet
2021-07-22 21:01   ` Martin KaFai Lau
2021-07-22 14:53 ` Kuniyuki Iwashima

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