netdev - Re: [PATCH bpf-next v2 3/3] tools/bpf: add a selftest for bpf_send

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Date:   Wed, 22 May 2019 19:38:17 +0000
From:   Yonghong Song <yhs@...com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
CC:     "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <Kernel-team@...com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH bpf-next v2 3/3] tools/bpf: add a selftest for
 bpf_send_signal() helper



On 5/22/19 11:48 AM, Andrii Nakryiko wrote:
> On Tue, May 21, 2019 at 10:40 PM Yonghong Song <yhs@...com> wrote:
>>
>> The test covered both nmi and tracepoint perf events.
>>    $ ./test_send_signal_user
>>    test_send_signal (tracepoint): OK
>>    test_send_signal (perf_event): OK
>>
>> Signed-off-by: Yonghong Song <yhs@...com>
>> ---
>>   tools/testing/selftests/bpf/Makefile          |   3 +-
>>   tools/testing/selftests/bpf/bpf_helpers.h     |   1 +
>>   .../bpf/progs/test_send_signal_kern.c         |  51 +++++
>>   .../selftests/bpf/test_send_signal_user.c     | 212 ++++++++++++++++++
>>   4 files changed, 266 insertions(+), 1 deletion(-)
>>   create mode 100644 tools/testing/selftests/bpf/progs/test_send_signal_kern.c
>>   create mode 100644 tools/testing/selftests/bpf/test_send_signal_user.c
>>
>> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
>> index 66f2dca1dee1..5eb6368a96a2 100644
>> --- a/tools/testing/selftests/bpf/Makefile
>> +++ b/tools/testing/selftests/bpf/Makefile
>> @@ -23,7 +23,8 @@ TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test
>>          test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
>>          test_sock test_btf test_sockmap test_lirc_mode2_user get_cgroup_id_user \
>>          test_socket_cookie test_cgroup_storage test_select_reuseport test_section_names \
>> -       test_netcnt test_tcpnotify_user test_sock_fields test_sysctl
>> +       test_netcnt test_tcpnotify_user test_sock_fields test_sysctl \
>> +       test_send_signal_user
>>
>>   BPF_OBJ_FILES = $(patsubst %.c,%.o, $(notdir $(wildcard progs/*.c)))
>>   TEST_GEN_FILES = $(BPF_OBJ_FILES)
>> diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h
>> index 5f6f9e7aba2a..cb02521b8e58 100644
>> --- a/tools/testing/selftests/bpf/bpf_helpers.h
>> +++ b/tools/testing/selftests/bpf/bpf_helpers.h
[...]
>> +
>> +int main(void)
>> +{
>> +       test_tracepoint();
>> +       test_nmi_perf_event();
> 
> Tests should probably propagate failure up to main() and return exit
> code != 0, if any of the tests failed.

Good catch! Will fix it in the next revision.

> 
>> +       return 0;
>> +}
>> --
>> 2.17.1
>>