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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE, USER_AGENT_GIT autolearn=unavailable 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 83A0DC8302B for ; Thu, 2 Sep 2021 17:23:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6CC846108B for ; Thu, 2 Sep 2021 17:23:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346608AbhIBRYJ (ORCPT ); Thu, 2 Sep 2021 13:24:09 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:57174 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346594AbhIBRYI (ORCPT ); Thu, 2 Sep 2021 13:24:08 -0400 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 182HLiXv010103 for ; Thu, 2 Sep 2021 10:23:09 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=cqfAvDSWKh8Noa59/EvrCVKrAQrpn7gaj+OEtq591Js=; b=TVYCPmXFMynOGuF1zW0iC562qb0BYHBGVbtGDuO8bXNiBO52GTfaAPJgvsvOCgIt7tX5 xD3b2EHxwxWXqltXFe1YmRp3fRDXBRg5TNKADhtoU4OlKmQCLhxA1UXlj0eXU1ZSiI3d JODRn4rqqlwJqmtXR7oa9NY3ZJuxJO5nJ2E= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 3atdwu5de1-20 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 02 Sep 2021 10:23:09 -0700 Received: from intmgw001.25.frc3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::f) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.14; Thu, 2 Sep 2021 10:23:01 -0700 Received: by devbig030.frc3.facebook.com (Postfix, from userid 158236) id D1F0E5FE24AE; Thu, 2 Sep 2021 10:20:05 -0700 (PDT) From: Dave Marchevsky To: CC: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Yonghong Song , , Dave Marchevsky Subject: [PATCH v4 bpf-next 8/9] selftests/bpf: add trace_vprintk test prog Date: Thu, 2 Sep 2021 10:19:28 -0700 Message-ID: <20210902171929.3922667-9-davemarchevsky@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210902171929.3922667-1-davemarchevsky@fb.com> References: <20210902171929.3922667-1-davemarchevsky@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-FB-Source: Intern X-Proofpoint-GUID: mbtv3_42AnKuXQXbyLp708PUrytrpgNe X-Proofpoint-ORIG-GUID: mbtv3_42AnKuXQXbyLp708PUrytrpgNe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-09-02_04:2021-09-02,2021-09-02 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 mlxlogscore=999 mlxscore=0 spamscore=0 phishscore=0 bulkscore=0 malwarescore=0 adultscore=0 clxscore=1015 suspectscore=0 impostorscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2108310000 definitions=main-2109020100 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org This commit adds a test prog for vprintk which confirms that: * bpf_trace_vprintk is writing to dmesg * __bpf_vprintk macro works as expected * >3 args are printed Approach and code are borrowed from trace_printk test. Signed-off-by: Dave Marchevsky Acked-by: Andrii Nakryiko --- tools/testing/selftests/bpf/Makefile | 3 +- .../selftests/bpf/prog_tests/trace_vprintk.c | 65 +++++++++++++++++++ .../selftests/bpf/progs/trace_vprintk.c | 25 +++++++ 3 files changed, 92 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/trace_vprintk.= c create mode 100644 tools/testing/selftests/bpf/progs/trace_vprintk.c diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftes= ts/bpf/Makefile index 866531c08e4f..0a4cdac7ea02 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -315,7 +315,8 @@ LINKED_SKELS :=3D test_static_linked.skel.h linked_fu= ncs.skel.h \ linked_vars.skel.h linked_maps.skel.h =20 LSKELS :=3D kfunc_call_test.c fentry_test.c fexit_test.c fexit_sleep.c \ - test_ksyms_module.c test_ringbuf.c atomics.c trace_printk.c + test_ksyms_module.c test_ringbuf.c atomics.c trace_printk.c \ + trace_vprintk.c SKEL_BLACKLIST +=3D $$(LSKELS) =20 test_static_linked.skel.h-deps :=3D test_static_linked1.o test_static_li= nked2.o diff --git a/tools/testing/selftests/bpf/prog_tests/trace_vprintk.c b/too= ls/testing/selftests/bpf/prog_tests/trace_vprintk.c new file mode 100644 index 000000000000..9fc1d279b673 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/trace_vprintk.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ + +#include + +#include "trace_vprintk.lskel.h" + +#define TRACEBUF "/sys/kernel/debug/tracing/trace_pipe" +#define SEARCHMSG "1,2,3,4,5,6,7,8,9,10" + +void test_trace_vprintk(void) +{ + int err =3D 0, iter =3D 0, found =3D 0; + struct trace_vprintk__bss *bss; + struct trace_vprintk *skel; + char *buf =3D NULL; + FILE *fp =3D NULL; + size_t buflen; + + skel =3D trace_vprintk__open_and_load(); + if (!ASSERT_OK_PTR(skel, "trace_vprintk__open_and_load")) + goto cleanup; + + bss =3D skel->bss; + + err =3D trace_vprintk__attach(skel); + if (!ASSERT_OK(err, "trace_vprintk__attach")) + goto cleanup; + + fp =3D fopen(TRACEBUF, "r"); + if (!ASSERT_OK_PTR(fp, "fopen(TRACEBUF)")) + goto cleanup; + + /* We do not want to wait forever if this test fails... */ + fcntl(fileno(fp), F_SETFL, O_NONBLOCK); + + /* wait for tracepoint to trigger */ + usleep(1); + trace_vprintk__detach(skel); + + if (!ASSERT_GT(bss->trace_vprintk_ran, 0, "bss->trace_vprintk_ran")) + goto cleanup; + + if (!ASSERT_GT(bss->trace_vprintk_ret, 0, "bss->trace_vprintk_ret")) + goto cleanup; + + /* verify our search string is in the trace buffer */ + while (getline(&buf, &buflen, fp) >=3D 0 || errno =3D=3D EAGAIN) { + if (strstr(buf, SEARCHMSG) !=3D NULL) + found++; + if (found =3D=3D bss->trace_vprintk_ran) + break; + if (++iter > 1000) + break; + } + + if (!ASSERT_EQ(found, bss->trace_vprintk_ran, "found")) + goto cleanup; + +cleanup: + trace_vprintk__destroy(skel); + free(buf); + if (fp) + fclose(fp); +} diff --git a/tools/testing/selftests/bpf/progs/trace_vprintk.c b/tools/te= sting/selftests/bpf/progs/trace_vprintk.c new file mode 100644 index 000000000000..255e2f018efe --- /dev/null +++ b/tools/testing/selftests/bpf/progs/trace_vprintk.c @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ + +#include "vmlinux.h" +#include +#include + +char _license[] SEC("license") =3D "GPL"; + +int trace_vprintk_ret =3D 0; +int trace_vprintk_ran =3D 0; + +SEC("fentry/__x64_sys_nanosleep") +int sys_enter(void *ctx) +{ + static const char one[] =3D "1"; + static const char three[] =3D "3"; + static const char five[] =3D "5"; + static const char seven[] =3D "7"; + static const char nine[] =3D "9"; + + trace_vprintk_ret =3D __bpf_vprintk("%s,%d,%s,%d,%s,%d,%s,%d,%s,%d %d\n= ", + one, 2, three, 4, five, 6, seven, 8, nine, 10, ++trace_vprintk_ran); + return 0; +} --=20 2.30.2