From patchwork Thu Sep 16 13:55:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hou Tao X-Patchwork-Id: 12499091 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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 B6332C433F5 for ; Thu, 16 Sep 2021 13:41:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 997F46120F for ; Thu, 16 Sep 2021 13:41:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240228AbhIPNmf (ORCPT ); Thu, 16 Sep 2021 09:42:35 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:19989 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240272AbhIPNme (ORCPT ); Thu, 16 Sep 2021 09:42:34 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4H9J663nnnzbmYp; Thu, 16 Sep 2021 21:37:02 +0800 (CST) Received: from dggpeml500025.china.huawei.com (7.185.36.35) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 16 Sep 2021 21:41:09 +0800 Received: from huawei.com (10.175.124.27) by dggpeml500025.china.huawei.com (7.185.36.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 16 Sep 2021 21:41:09 +0800 From: Hou Tao To: Alexei Starovoitov CC: Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , , , Subject: [PATCH 0/3] add support for writable bare tracepoint Date: Thu, 16 Sep 2021 21:55:08 +0800 Message-ID: <20210916135511.3787194-1-houtao1@huawei.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-Originating-IP: [10.175.124.27] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpeml500025.china.huawei.com (7.185.36.35) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hi, The patchset series supports writable context for bare tracepoint. The main idea comes from patchset "writable contexts for bpf raw tracepoints" [1], but it only supports normal tracepoint with associated trace event under tracefs. Bare tracepoint is more light-weight and doesn't have the ABI burden of normal tracepoint, so add support for it in BPF. Any comments are welcome. [1]: https://lore.kernel.org/lkml/20190426184951.21812-1-mmullins@fb.com Hou Tao (3): bpf: support writable context for bare tracepoint libbpf: support detecting and attaching of writable tracepoint program bpf/selftests: add test for writable bare tracepoint include/trace/bpf_probe.h | 19 +++++++-- tools/lib/bpf/libbpf.c | 4 ++ .../bpf/bpf_testmod/bpf_testmod-events.h | 15 +++++++ .../selftests/bpf/bpf_testmod/bpf_testmod.c | 10 +++++ .../selftests/bpf/bpf_testmod/bpf_testmod.h | 5 +++ .../selftests/bpf/prog_tests/module_attach.c | 40 ++++++++++++++++++- .../selftests/bpf/progs/test_module_attach.c | 14 +++++++ 7 files changed, 101 insertions(+), 6 deletions(-)