From patchwork Wed Apr 29 03:58:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Liu X-Patchwork-Id: 1278945 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: incoming-bpf@patchwork.ozlabs.org Delivered-To: patchwork-incoming-bpf@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=fb.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=fb.com header.i=@fb.com header.a=rsa-sha256 header.s=facebook header.b=EWYFD79d; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49BlB54wrqz9sSb for ; Wed, 29 Apr 2020 13:58:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726755AbgD2D6x (ORCPT ); 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Tue, 28 Apr 2020 20:58:51 -0700 Received: from intmgw003.03.ash8.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Tue, 28 Apr 2020 20:58:50 -0700 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id 4FFC662E4BEF; Tue, 28 Apr 2020 20:58:47 -0700 (PDT) Smtp-Origin-Hostprefix: devbig From: Song Liu Smtp-Origin-Hostname: devbig006.ftw2.facebook.com To: , CC: , , , Song Liu Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH v7 bpf-next 3/3] bpf: add selftest for BPF_ENABLE_STATS Date: Tue, 28 Apr 2020 20:58:41 -0700 Message-ID: <20200429035841.3959159-4-songliubraving@fb.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200429035841.3959159-1-songliubraving@fb.com> References: <20200429035841.3959159-1-songliubraving@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-04-28_15:2020-04-28,2020-04-28 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 mlxscore=0 malwarescore=0 mlxlogscore=999 suspectscore=8 bulkscore=0 clxscore=1015 impostorscore=0 adultscore=0 priorityscore=1501 spamscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004290028 X-FB-Internal: deliver Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Add test for BPF_ENABLE_STATS, which should enable run_time_ns stats. ~/selftests/bpf# ./test_progs -t enable_stats -v test_enable_stats:PASS:skel_open_and_load 0 nsec test_enable_stats:PASS:get_stats_fd 0 nsec test_enable_stats:PASS:attach_raw_tp 0 nsec test_enable_stats:PASS:get_prog_info 0 nsec test_enable_stats:PASS:check_stats_enabled 0 nsec test_enable_stats:PASS:map_lookup_elem 0 nsec test_enable_stats:PASS:check_run_cnt_valid 0 nsec Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Song Liu --- .../selftests/bpf/prog_tests/enable_stats.c | 58 +++++++++++++++++++ .../selftests/bpf/progs/test_enable_stats.c | 18 ++++++ 2 files changed, 76 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/enable_stats.c create mode 100644 tools/testing/selftests/bpf/progs/test_enable_stats.c diff --git a/tools/testing/selftests/bpf/prog_tests/enable_stats.c b/tools/testing/selftests/bpf/prog_tests/enable_stats.c new file mode 100644 index 000000000000..4930efe4cd2b --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/enable_stats.c @@ -0,0 +1,58 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include "test_enable_stats.skel.h" + +void test_enable_stats(void) +{ + int stats_fd, err, prog_fd, bss_fd, i; + struct test_enable_stats *skel; + struct bpf_prog_info info; + __u32 info_len = sizeof(info); + int duration = 0; + __u32 zero = 0; + __u64 count; + + skel = test_enable_stats__open_and_load(); + if (CHECK(!skel, "skel_open_and_load", "skeleton open/load failed\n")) + return; + + stats_fd = bpf_enable_stats(BPF_STATS_RUNTIME_CNT); + if (CHECK(stats_fd < 0, "get_stats_fd", "failed %d\n", errno)) { + test_enable_stats__destroy(skel); + return; + } + + err = test_enable_stats__attach(skel); + if (CHECK(err, "attach_raw_tp", "err %d\n", err)) + goto cleanup; + + /* generate 100 sys_enter */ + for (i = 0; i < 100; i++) + usleep(1); + + test_enable_stats__detach(skel); + + prog_fd = bpf_program__fd(skel->progs.test_enable_stats); + memset(&info, 0, info_len); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (CHECK(err, "get_prog_info", + "failed to get bpf_prog_info for fd %d\n", prog_fd)) + goto cleanup; + if (CHECK(info.run_time_ns == 0, "check_stats_enabled", + "failed to enable run_time_ns stats\n")) + goto cleanup; + + bss_fd = bpf_map__fd(skel->maps.bss); + err = bpf_map_lookup_elem(bss_fd, &zero, &count); + if (CHECK(err, "map_lookup_elem", + "failed map_lookup_elem for fd %d\n", bss_fd)) + goto cleanup; + + CHECK(info.run_cnt != count, "check_run_cnt_valid", + "invalid run_cnt stats\n"); + +cleanup: + test_enable_stats__destroy(skel); + close(stats_fd); +} diff --git a/tools/testing/selftests/bpf/progs/test_enable_stats.c b/tools/testing/selftests/bpf/progs/test_enable_stats.c new file mode 100644 index 000000000000..dfd987e4ede4 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_enable_stats.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Facebook + +#include +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +static __u64 count; + +SEC("raw_tracepoint/sys_enter") +int test_enable_stats(void *ctx) +{ + count += 1; + return 0; +}