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From: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
To: <kafai@fb.com>
Cc: <ast@kernel.org>, <bpf@vger.kernel.org>, <daniel@iogearbox.net>,
	<edumazet@google.com>, <kernel-team@fb.com>,
	<ncardwell@google.com>, <netdev@vger.kernel.org>,
	<ycheng@google.com>, <yhs@fb.com>, <kuniyu@amazon.co.jp>
Subject: Re: [PATCH v2 bpf-next 0/8] bpf: Allow bpf tcp iter to do bpf_(get|set)sockopt
Date: Thu, 22 Jul 2021 23:53:41 +0900	[thread overview]
Message-ID: <20210722145341.72566-1-kuniyu@amazon.co.jp> (raw)
In-Reply-To: <20210701200535.1033513-1-kafai@fb.com>

From:   Martin KaFai Lau <kafai@fb.com>
Date:   Thu, 1 Jul 2021 13:05:35 -0700
> 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.
> 
> Patch 6 is to have the bpf tcp iter doing batching which
> then allows lock_sock.  lock_sock is needed for setsockopt.
> 
> Patch 7 allows the bpf tcp iter to call bpf_(get|set)sockopt.

I have a comment on the first patch, but the series looks good to me.

Acked-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>

      parent reply	other threads:[~2021-07-22 14:54 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-01 20:05 [PATCH v2 bpf-next 0/8] bpf: Allow bpf tcp iter to do bpf_(get|set)sockopt 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
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 [this message]

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