linux-kernel - Re: [PATCHv3 bpf-next 9/9] selftests/bpf: Add file_build

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Message-ID: <CAEf4BzaXRXZ7u3Pj2zsS9tXB-j8GtovK5rveVke=5KYTj2DdMA@mail.gmail.com>
Date:   Thu, 16 Mar 2023 15:36:46 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Hao Luo <haoluo@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Matthew Wilcox <willy@...radead.org>, bpf@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Namhyung Kim <namhyung@...il.com>,
        Dave Chinner <david@...morbit.com>
Subject: Re: [PATCHv3 bpf-next 9/9] selftests/bpf: Add file_build_id test

On Thu, Mar 16, 2023 at 10:03 AM Jiri Olsa <jolsa@...nel.org> wrote:
>
> The test attaches bpf program to sched_process_exec tracepoint
> and gets build of executed file from bprm->file object.

typo: build ID

>
> We use urandom_read as the test program and in addition we also
> attach uprobe to liburandom_read.so:urandlib_read_without_sema
> and retrieve and check build id of that shared library.
>
> Also executing the no_build_id binary to verify the bpf program
> gets the error properly.
>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/testing/selftests/bpf/Makefile          |  7 +-
>  tools/testing/selftests/bpf/no_build_id.c     |  6 ++
>  .../selftests/bpf/prog_tests/file_build_id.c  | 98 +++++++++++++++++++
>  .../selftests/bpf/progs/file_build_id.c       | 70 +++++++++++++
>  tools/testing/selftests/bpf/test_progs.h      | 10 ++
>  5 files changed, 190 insertions(+), 1 deletion(-)
>  create mode 100644 tools/testing/selftests/bpf/no_build_id.c
>  create mode 100644 tools/testing/selftests/bpf/prog_tests/file_build_id.c
>  create mode 100644 tools/testing/selftests/bpf/progs/file_build_id.c
>

Looks good, but let's add CONFIG_FILE_BUILD_ID to
selftests/bpf/config, as Daniel mentioned.

Acked-by: Andrii Nakryiko <andrii@...nel.org>

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