linux-kernel - Re: [PATCH bpf-next 4/5] selftests/bpf: move two functions to test

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Date:   Mon, 3 Aug 2020 04:34:13 +0000
From:   Song Liu <songliubraving@...com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
CC:     open list <linux-kernel@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <Kernel-team@...com>,
        john fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Daniel Xu <dlxu@...com>
Subject: Re: [PATCH bpf-next 4/5] selftests/bpf: move two functions to
 test_progs.c



> On Aug 2, 2020, at 6:46 PM, Andrii Nakryiko <andrii.nakryiko@...il.com> wrote:
> 
> On Sat, Aug 1, 2020 at 1:50 AM Song Liu <songliubraving@...com> wrote:
>> 
>> Move time_get_ns() and get_base_addr() to test_progs.c, so they can be
>> used in other tests.
>> 
>> Signed-off-by: Song Liu <songliubraving@...com>
>> ---
>> .../selftests/bpf/prog_tests/attach_probe.c   | 21 -------------
>> .../selftests/bpf/prog_tests/test_overhead.c  |  8 -----
>> tools/testing/selftests/bpf/test_progs.c      | 30 +++++++++++++++++++
>> tools/testing/selftests/bpf/test_progs.h      |  2 ++
>> 4 files changed, 32 insertions(+), 29 deletions(-)
>> 
> 
> [...]
> 
>> static int test_task_rename(const char *prog)
>> {
>>        int i, fd, duration = 0, err;
>> diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
>> index b1e4dadacd9b4..c9e6a5ad5b9a4 100644
>> --- a/tools/testing/selftests/bpf/test_progs.c
>> +++ b/tools/testing/selftests/bpf/test_progs.c
>> @@ -622,6 +622,36 @@ int cd_flavor_subdir(const char *exec_name)
>>        return chdir(flavor);
>> }
>> 
>> +__u64 time_get_ns(void)
>> +{
> 
> I'd try to avoid adding stuff to test_progs.c. There is generic
> testing_helpers.c, maybe let's put this there?
> 
>> +       struct timespec ts;
>> +
>> +       clock_gettime(CLOCK_MONOTONIC, &ts);
>> +       return ts.tv_sec * 1000000000ull + ts.tv_nsec;
>> +}
>> +
>> +ssize_t get_base_addr(void)
>> +{
> 
> This would definitely be better in trace_helpers.c, though.

Will update. 

Thanks,
Song