From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 880F8C06510 for ; Tue, 2 Jul 2019 16:14:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5ADDD2146F for ; Tue, 2 Jul 2019 16:14:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="mwLFPqLX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725996AbfGBQOH (ORCPT ); Tue, 2 Jul 2019 12:14:07 -0400 Received: from mail-pl1-f202.google.com ([209.85.214.202]:45015 "EHLO mail-pl1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725858AbfGBQOG (ORCPT ); Tue, 2 Jul 2019 12:14:06 -0400 Received: by mail-pl1-f202.google.com with SMTP id n1so601025plk.11 for ; Tue, 02 Jul 2019 09:14:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=L7R6X5tBrXMAw/vqdDRcSek4d528xe4FlyccGeilGP0=; b=mwLFPqLX7ST60ZfFh/0Y8wbnEMeWChsbibeeBdoQ9NH+WQRI1vo3mpn5jPx/pKupZF Jq215vvfIPad7QfoJJsPMz9ge8XXJwe/7OYAJR6pu0D7Z+B7t7rxiG4Ar0FaDNPDL6xh NVPv8nQxKAFXK31Fn/abWT5oLEFCHGJ78jlBfHeKiYmskN9A3p54JzxWsctMHad+Bj6l kOvRY3TmrMDcQxgcMV/31q/ZmS8dvrDunyYTGzzHqp6BAyflX9FgJn4CDrOVTgcOZ+Dv tlJY8jVN2JNhqPIki5slnULOppvljyg+tvWfWy+qiFXmlSCtpjYlYQGi5sNXiWxygmyx WktA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=L7R6X5tBrXMAw/vqdDRcSek4d528xe4FlyccGeilGP0=; b=YeZUOufpkocsO9NhFrCAib7dTTN+d8buSftttLtyRU/w83j+czG+t098iM6MRKO8sW mWujjeZBrVdW/TnTu7iqmCoqJWLWKag6rMMxNlGanGpISIdCA67aVbOa52Syo3HFfGUe hj8RZ7Or9j8KkuuHHzl7h2Fq0sdxxOnEtxOyd2ATopmd08IJss5Zs7IDuQQ8A/opSfO2 dW+tlZErhYmCkN5qNlxiB0mVLBH6dFq+1wizNpfeLkOeZ/5obI01cFwIyxqOYkcDMecb Qr/510P5go/NwFyDwz2MYdJg7LJbQmgCAvjETOZp5xBETjSBGuvgN8FNjO8q7Zbt6TX7 QaYw== X-Gm-Message-State: APjAAAUsFmyFFaGgUa4pnLWLSs5GJ6eeqxl3Gp0wrs7sWRpP2Nau/HB7 wwqzhfTgh4yGfUmfMcrI2HL0gos= X-Google-Smtp-Source: APXvYqzOVh8vd2O1G0sykUuAWlF3Z9Viyb0b064Q8G/QLbx1kSTot/UUVYf+9vDApvmYEyy5BUmcDRA= X-Received: by 2002:a63:6155:: with SMTP id v82mr31007318pgb.304.1562084045619; Tue, 02 Jul 2019 09:14:05 -0700 (PDT) Date: Tue, 2 Jul 2019 09:13:55 -0700 Message-Id: <20190702161403.191066-1-sdf@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH bpf-next v2 0/8] bpf: TCP RTT sock_ops bpf callback From: Stanislav Fomichev To: netdev@vger.kernel.org, bpf@vger.kernel.org Cc: davem@davemloft.net, ast@kernel.org, daniel@iogearbox.net, Stanislav Fomichev , Eric Dumazet , Priyaranjan Jha , Yuchung Cheng , Soheil Hassas Yeganeh Content-Type: text/plain; charset="UTF-8" Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Congestion control team would like to have a periodic callback to track some TCP statistics. Let's add a sock_ops callback that can be selectively enabled on a socket by socket basis and is executed for every RTT. BPF program frequency can be further controlled by calling bpf_ktime_get_ns and bailing out early. I run neper tcp_stream and tcp_rr tests with the sample program from the last patch and didn't observe any noticeable performance difference. v2: * add a comment about second accept() in selftest (Yonghong Song) * refer to tcp_bpf.readme in sample program (Yonghong Song) Suggested-by: Eric Dumazet Cc: Eric Dumazet Cc: Priyaranjan Jha Cc: Yuchung Cheng Cc: Soheil Hassas Yeganeh Acked-by: Soheil Hassas Yeganeh Acked-by: Yuchung Cheng Stanislav Fomichev (8): bpf: add BPF_CGROUP_SOCK_OPS callback that is executed on every RTT bpf: split shared bpf_tcp_sock and bpf_sock_ops implementation bpf: add dsack_dups/delivered{,_ce} to bpf_tcp_sock bpf: add icsk_retransmits to bpf_tcp_sock bpf/tools: sync bpf.h selftests/bpf: test BPF_SOCK_OPS_RTT_CB samples/bpf: add sample program that periodically dumps TCP stats samples/bpf: fix tcp_bpf.readme detach command include/net/tcp.h | 8 + include/uapi/linux/bpf.h | 12 +- net/core/filter.c | 207 +++++++++++----- net/ipv4/tcp_input.c | 4 + samples/bpf/Makefile | 1 + samples/bpf/tcp_bpf.readme | 2 +- samples/bpf/tcp_dumpstats_kern.c | 68 ++++++ tools/include/uapi/linux/bpf.h | 12 +- tools/testing/selftests/bpf/Makefile | 3 +- tools/testing/selftests/bpf/progs/tcp_rtt.c | 61 +++++ tools/testing/selftests/bpf/test_tcp_rtt.c | 254 ++++++++++++++++++++ 11 files changed, 574 insertions(+), 58 deletions(-) create mode 100644 samples/bpf/tcp_dumpstats_kern.c create mode 100644 tools/testing/selftests/bpf/progs/tcp_rtt.c create mode 100644 tools/testing/selftests/bpf/test_tcp_rtt.c -- 2.22.0.410.gd8fdbe21b5-goog