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=-2.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 6AAD8C43613 for ; Thu, 20 Jun 2019 23:10:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 30F132082C for ; Thu, 20 Jun 2019 23:10:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="fiZwf+Yx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725951AbfFTXKN (ORCPT ); Thu, 20 Jun 2019 19:10:13 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:3212 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725815AbfFTXKN (ORCPT ); Thu, 20 Jun 2019 19:10:13 -0400 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5KN9EV2016759 for ; Thu, 20 Jun 2019 16:10:11 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=facebook; bh=RnLy4sqnK36QnV4nRge6edPCKvHBGHk32kZOjq8y8/I=; b=fiZwf+YxwIHi+ZUMHqLE6Dkv3fiFiAzyxse0PFHpEnUs8n08rEtoNu+djf0xWYWvLmC0 KwEOCU1de+PAGFYYiHV3lWATu56qlYNQFEuCcUmoH0KEqxhgIaUZlIF01hv7saLb7I8q mWLkUhkpFFeuViAxjpqndSXljZtg95/qiXU= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2t8d3e9gvy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 20 Jun 2019 16:10:11 -0700 Received: from mx-out.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Thu, 20 Jun 2019 16:10:10 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id 4807B86173D; Thu, 20 Jun 2019 16:10:07 -0700 (PDT) Smtp-Origin-Hostprefix: dev From: Andrii Nakryiko Smtp-Origin-Hostname: dev101.prn2.facebook.com To: , , , , , CC: Andrii Nakryiko Smtp-Origin-Cluster: prn2c23 Subject: [PATCH bpf-next 0/7] libbpf: add tracing attach APIs Date: Thu, 20 Jun 2019 16:09:44 -0700 Message-ID: <20190620230951.3155955-1-andriin@fb.com> X-Mailer: git-send-email 2.17.1 X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-20_15:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=625 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906200164 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patchset adds the following APIs to allow attaching BPF programs to tracing entities: - bpf_program__attach_perf_event for attaching to any opened perf event FD, allowing users full control; - bpf_program__attach_kprobe for attaching to kernel probes (both entry and return probes); - bpf_program__attach_uprobe for attaching to user probes (both entry/return); - bpf_program__attach_tracepoint for attaching to kernel tracepoints; - bpf_program__attach_raw_tracepoint for attaching to raw kernel tracepoint (wrapper around bpf_raw_tracepoint_open); This set of APIs makes libbpf more useful for tracing applications. Pre-patch #1 makes internal libbpf_strerror_r helper function work w/ negative error codes, lifting the burder off callers to keep track of error sign. Patch #2 adds attach_perf_event, which is the base for all other APIs. Patch #3 adds kprobe/uprobe APIs. Patch #4 adds tracepoint/raw_tracepoint APIs. Patch #5 converts one existing test to use attach_perf_event. Patch #6 adds new kprobe/uprobe tests. Patch #7 converts all the selftests currently using tracepoint to new APIs. Andrii Nakryiko (7): libbpf: make libbpf_strerror_r agnostic to sign of error libbpf: add ability to attach/detach BPF to perf event libbpf: add kprobe/uprobe attach API libbpf: add tracepoint/raw tracepoint attach API selftests/bpf: switch test to new attach_perf_event API selftests/bpf: add kprobe/uprobe selftests selftests/bpf: convert existing tracepoint tests to new APIs tools/lib/bpf/libbpf.c | 347 ++++++++++++++++++ tools/lib/bpf/libbpf.h | 17 + tools/lib/bpf/libbpf.map | 6 + tools/lib/bpf/str_error.c | 2 +- .../selftests/bpf/prog_tests/attach_probe.c | 151 ++++++++ .../bpf/prog_tests/stacktrace_build_id.c | 49 +-- .../bpf/prog_tests/stacktrace_build_id_nmi.c | 16 +- .../selftests/bpf/prog_tests/stacktrace_map.c | 42 +-- .../bpf/prog_tests/stacktrace_map_raw_tp.c | 14 +- .../bpf/prog_tests/task_fd_query_rawtp.c | 10 +- .../bpf/prog_tests/task_fd_query_tp.c | 51 +-- .../bpf/prog_tests/tp_attach_query.c | 56 +-- .../selftests/bpf/progs/test_attach_probe.c | 55 +++ 13 files changed, 650 insertions(+), 166 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/attach_probe.c create mode 100644 tools/testing/selftests/bpf/progs/test_attach_probe.c -- 2.17.1