linux-kernel - [PATCHv2 bpf-next 0/9] uprobe, bpf: Add session support

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Date: Mon,  1 Jul 2024 18:41:06 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>
Cc: 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>,
	Stanislav Fomichev <sdf@...gle.com>,
	Hao Luo <haoluo@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Subject: [PATCHv2 bpf-next 0/9] uprobe, bpf: Add session support

hi,
this patchset is adding support for session uprobe attachment
and using it through bpf link for bpf programs.

The session means that the uprobe consumer is executed on entry
and return of probed function with additional control:
  - entry callback can control execution of the return callback
  - entry and return callbacks can share data/cookie

On more details please see patch #1.

v2 changes:
  - re-implement uprobe session support [Andrii]
  - added test for mixed uprobe consumers

thanks,
jirka


---
Jiri Olsa (9):
      uprobe: Add support for session consumer
      bpf: Add support for uprobe multi session attach
      bpf: Add support for uprobe multi session context
      libbpf: Add support for uprobe multi session attach
      libbpf: Add uprobe session attach type names to attach_type_name
      selftests/bpf: Add uprobe session test
      selftests/bpf: Add uprobe session cookie test
      selftests/bpf: Add uprobe session recursive test
      selftests/bpf: Add uprobe session consumers test

 include/linux/uprobes.h                                            |  16 +++-
 include/uapi/linux/bpf.h                                           |   1 +
 kernel/bpf/syscall.c                                               |   9 ++-
 kernel/events/uprobes.c                                            | 129 ++++++++++++++++++++++++++++++---
 kernel/trace/bpf_trace.c                                           |  54 ++++++++++----
 kernel/trace/trace_uprobe.c                                        |  12 ++-
 tools/include/uapi/linux/bpf.h                                     |   1 +
 tools/lib/bpf/bpf.c                                                |   1 +
 tools/lib/bpf/libbpf.c                                             |  51 ++++++++++++-
 tools/lib/bpf/libbpf.h                                             |   4 +-
 tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c         | 333 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tools/testing/selftests/bpf/progs/uprobe_multi_session.c           |  53 ++++++++++++++
 tools/testing/selftests/bpf/progs/uprobe_multi_session_consumers.c |  53 ++++++++++++++
 tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c    |  48 ++++++++++++
 tools/testing/selftests/bpf/progs/uprobe_multi_session_recursive.c |  44 +++++++++++
 15 files changed, 771 insertions(+), 38 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session.c
 create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session_consumers.c
 create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session_cookie.c
 create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_session_recursive.c