netdev - [PATCHv2 bpf-next 0/5] bpf: Tracing and lsm programs re-attach

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Message-Id: <20210406212913.970917-1-jolsa@kernel.org>
Date:   Tue,  6 Apr 2021 23:29:08 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>
Cc:     netdev@...r.kernel.org, bpf@...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>,
        Toke Høiland-Jørgensen <toke@...hat.com>
Subject: [PATCHv2 bpf-next 0/5] bpf: Tracing and lsm programs re-attach

hi,
while adding test for pinning the module while there's
trampoline attach to it, I noticed that we don't allow
link detach and following re-attach for trampolines.
Adding that for tracing and lsm programs.

You need to have patch [1] from bpf tree for test module
attach test to pass.

v2 changes:
  - allow re-attach for TRACING and LSM programs
  - add lsm re-attach test

thanks,
jirka


[1] https://lore.kernel.org/bpf/20210326105900.151466-1-jolsa@kernel.org/
---
Jiri Olsa (5):
      bpf: Allow trampoline re-attach for tracing and lsm programs
      selftests/bpf: Add re-attach test to fentry_test
      selftests/bpf: Add re-attach test to fexit_test
      selftests/bpf: Add re-attach test to lsm test
      selftests/bpf: Test that module can't be unloaded with attached trampoline

 kernel/bpf/syscall.c                                   | 23 +++++++++++++++++------
 kernel/bpf/trampoline.c                                |  2 +-
 tools/testing/selftests/bpf/prog_tests/fentry_test.c   | 48 ++++++++++++++++++++++++++++++++++++++----------
 tools/testing/selftests/bpf/prog_tests/fexit_test.c    | 48 ++++++++++++++++++++++++++++++++++++++----------
 tools/testing/selftests/bpf/prog_tests/module_attach.c | 23 +++++++++++++++++++++++
 tools/testing/selftests/bpf/prog_tests/test_lsm.c      | 48 ++++++++++++++++++++++++++++++++++++++----------
 6 files changed, 155 insertions(+), 37 deletions(-)