netdev - [PATCH bpf-next 0/6] bpftool: Allow to select sections and filter probes

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Message-Id: <20200218190224.22508-1-mrostecki@opensuse.org>
Date:   Tue, 18 Feb 2020 20:02:17 +0100
From:   Michal Rostecki <mrostecki@...nsuse.org>
To:     bpf@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        Quentin Monnet <quentin.monnet@...ronome.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Shuah Khan <shuah@...nel.org>,
        linux-kselftest@...r.kernel.org
Subject: [PATCH bpf-next 0/6] bpftool: Allow to select sections and filter probes

This patch series extend the "bpftool feature" subcommand with the
new positional arguments:

- "section", which allows to select a specific section of probes (i.e.
  "system_config", "program_types", "map_types");
- "filter_in", which allows to select only probes which matches the
  given regex pattern;
- "filter_out", which allows to filter out probes which do not match the
  given regex pattern.

The main motivation behind those changes is ability the fact that some
probes (for example those related to "trace" or "write_user" helpers)
emit dmesg messages which might be confusing for people who are running
on production environments. For details see the Cilium issue[0].

[0] https://github.com/cilium/cilium/issues/10048

Michal Rostecki (6):
  bpftool: Move out sections to separate functions
  bpftool: Allow to select a specific section to probe
  bpftool: Add arguments for filtering in and filtering out probes
  bpftool: Update documentation of "bpftool feature" command
  bpftool: Update bash completion for "bpftool feature" command
  selftests/bpf: Add test for "bpftool feature" command

 .../bpftool/Documentation/bpftool-feature.rst |  37 +-
 tools/bpf/bpftool/bash-completion/bpftool     |  32 +-
 tools/bpf/bpftool/feature.c                   | 592 +++++++++++++-----
 tools/testing/selftests/.gitignore            |   5 +-
 tools/testing/selftests/bpf/Makefile          |   3 +-
 tools/testing/selftests/bpf/test_bpftool.py   | 294 +++++++++
 tools/testing/selftests/bpf/test_bpftool.sh   |   5 +
 7 files changed, 811 insertions(+), 157 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/test_bpftool.py
 create mode 100755 tools/testing/selftests/bpf/test_bpftool.sh

-- 
2.25.0