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Mon, 27 Apr 2020 16:44:43 -0700 Received: from intmgw005.03.ash8.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:21d::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Mon, 27 Apr 2020 16:44:42 -0700 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id 7EAE162E3380; Mon, 27 Apr 2020 16:44:36 -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 v5 bpf-next 3/3] bpf: add selftest for BPF_ENABLE_STATS Date: Mon, 27 Apr 2020 16:44:23 -0700 Message-ID: <20200427234423.998085-4-songliubraving@fb.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200427234423.998085-1-songliubraving@fb.com> References: <20200427234423.998085-1-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=2020-04-27_17:2020-04-27,2020-04-27 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 mlxscore=0 malwarescore=0 bulkscore=0 phishscore=0 clxscore=1015 mlxlogscore=999 spamscore=0 lowpriorityscore=0 impostorscore=0 suspectscore=8 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004270193 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@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 Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Song Liu --- .../selftests/bpf/prog_tests/enable_stats.c | 45 +++++++++++++++++++ .../selftests/bpf/progs/test_enable_stats.c | 28 ++++++++++++ 2 files changed, 73 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..987fc743ab75 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/enable_stats.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include "test_enable_stats.skel.h" + +void test_enable_stats(void) +{ + struct test_enable_stats *skel; + struct bpf_prog_info info = {}; + __u32 info_len = sizeof(info); + int stats_fd, err, prog_fd; + int duration = 0; + + 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)) + goto cleanup; + + err = test_enable_stats__attach(skel); + + if (CHECK(err, "attach_raw_tp", "err %d\n", err)) + goto cleanup; + + usleep(1000); + + prog_fd = bpf_program__fd(skel->progs.test_enable_stats); + 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; + + CHECK(info.run_time_ns == 0, "check_stats_enabled", + "failed to enable run_time_ns stats\n"); + +cleanup: + test_enable_stats__destroy(skel); + if (stats_fd >= 0) + 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..f95ac0c94639 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_enable_stats.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Facebook + +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 1); + __type(key, __u32); + __type(value, __u64); +} count SEC(".maps"); + +SEC("raw_tracepoint/sys_enter") +int test_enable_stats(void *ctx) +{ + __u32 key = 0; + __u64 *val; + + val = bpf_map_lookup_elem(&count, &key); + if (val) + *val += 1; + + return 0; +}