linux-kernel - [PATCH bpf-next v4 0/3] libbpf: allow users to set kprobe/uprobe attach mode

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Date:   Mon,  6 Mar 2023 14:48:30 +0800
From:   menglong8.dong@...il.com
To:     andrii.nakryiko@...il.com, alan.maguire@...cle.com
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        martin.lau@...ux.dev, song@...nel.org, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, jolsa@...nel.org, benbjiang@...cent.com,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        Menglong Dong <imagedong@...cent.com>
Subject: [PATCH bpf-next v4 0/3] libbpf: allow users to set kprobe/uprobe attach mode

From: Menglong Dong <imagedong@...cent.com>

By default, libbpf will attach the kprobe/uprobe BPF program in the
latest mode that supported by kernel. In this series, we add the support
to let users manually attach kprobe/uprobe in legacy/perf/link mode in
the 1th patch.

And in the 2th patch, we split the testing 'attach_probe' into multi
subtests, as Andrii suggested.

In the 3th patch, we add the testings for loading kprobe/uprobe in
different mode.

Changes since v3:
- rename eBPF to BPF in the doc
- use OPTS_GET() to get the value of 'force_ioctl_attach'
- error out on attach mode is not supported
- use test_attach_probe_manual__open_and_load() directly

Changes since v2:
- fix the typo in the 2th patch

Changes since v1:
- some small changes in the 1th patch, as Andrii suggested
- split 'attach_probe' into multi subtests

Menglong Dong (3):
  libbpf: add support to set kprobe/uprobe attach mode
  selftests/bpf: split test_attach_probe into multi subtests
  selftests/bpf: add test for legacy/perf kprobe/uprobe attach mode

 tools/lib/bpf/libbpf.c                        |  47 ++-
 tools/lib/bpf/libbpf.h                        |  31 +-
 .../selftests/bpf/prog_tests/attach_probe.c   | 291 ++++++++++++------
 .../bpf/progs/test_attach_kprobe_sleepable.c  |  23 ++
 .../selftests/bpf/progs/test_attach_probe.c   |  35 +--
 .../bpf/progs/test_attach_probe_manual.c      |  53 ++++
 6 files changed, 347 insertions(+), 133 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/progs/test_attach_kprobe_sleepable.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_attach_probe_manual.c

-- 
2.39.0