Re: [PATCH bpf-next v3 0/2] bpf: add bpf_send_signal_thread() helper

[Andrii Nakryiko <andrii.nakryiko@gmail.com>]

On Tue, Jan 14, 2020 at 7:50 PM Yonghong Song <yhs@fb.com> wrote:
>
> Commit 8b401f9ed244 ("bpf: implement bpf_send_signal() helper")
> added helper bpf_send_signal() which permits bpf program to
> send a signal to the current process. The signal may send to
> any thread of the process.
>
> This patch implemented a new helper bpf_send_signal_thread()
> to send a signal to the thread corresponding to the kernel current task.
> This helper can simplify user space code if the thread context of
> bpf sending signal is needed in user space. Please see Patch #1 for
> details of use case and kernel implementation.
>
> Patch #2 added some bpf self tests for the new helper.
>
> Changelogs:
>   v2 -> v3:
>     - More simplification for skeleton codes by removing not-needed
>       mmap code and redundantly created tracepoint link.
>   v1 -> v2:
>     - More description for the difference between bpf_send_signal()
>       and bpf_send_signal_thread() in the uapi header bpf.h.
>     - Use skeleton and mmap for send_signal test.
>
> Yonghong Song (2):
>   bpf: add bpf_send_signal_thread() helper
>   tools/bpf: add self tests for bpf_send_signal_thread()
>
>  include/uapi/linux/bpf.h                      |  19 ++-
>  kernel/trace/bpf_trace.c                      |  27 +++-
>  tools/include/uapi/linux/bpf.h                |  19 ++-
>  .../selftests/bpf/prog_tests/send_signal.c    | 128 +++++++-----------
>  .../bpf/progs/test_send_signal_kern.c         |  51 +++----
>  5 files changed, 131 insertions(+), 113 deletions(-)
>
> --
> 2.17.1
>

For the series:

Acked-by: Andrii Nakryiko <andriin@fb.com>