netdev - [PATCH bpf-next v2 0/5] samples: bpf: refactor kprobe tracing progs with libbpf

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Date:   Sat, 16 May 2020 13:06:03 +0900
From:   "Daniel T. Lee" <danieltimlee@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        John Fastabend <john.fastabend@...il.com>,
        Yonghong Song <yhs@...com>
Subject: [PATCH bpf-next v2 0/5] samples: bpf: refactor kprobe tracing progs with libbpf

Currently, the kprobe BPF program attachment method for bpf_load is
pretty outdated. The implementation of bpf_load "directly" controls and
manages(create, delete) the kprobe events of DEBUGFS. On the other hand,
using using the libbpf automatically manages the kprobe event.
(under bpf_link interface)

This patchset refactors kprobe tracing programs with using libbpf API
for loading bpf program instead of previous bpf_load implementation.

---
Changes in V2:
 - refactor pointer error check with libbpf_get_error
 - on bpf object open failure, return instead jump to cleanup
 - add macro for adding architecture prefix to system calls (sys_*)

Daniel T. Lee (5):
  samples: bpf: refactor pointer error check with libbpf
  samples: bpf: refactor kprobe tracing user progs with libbpf
  samples: bpf: refactor tail call user progs with libbpf
  samples: bpf: add tracex7 test file to .gitignore
  samples: bpf: refactor kprobe, tail call kern progs map definition

 samples/bpf/.gitignore              |  1 +
 samples/bpf/Makefile                | 16 +++----
 samples/bpf/sampleip_kern.c         | 12 +++---
 samples/bpf/sampleip_user.c         |  7 +--
 samples/bpf/sockex3_kern.c          | 36 ++++++++--------
 samples/bpf/sockex3_user.c          | 64 +++++++++++++++++++---------
 samples/bpf/trace_common.h          | 13 ++++++
 samples/bpf/trace_event_kern.c      | 24 +++++------
 samples/bpf/trace_event_user.c      |  9 ++--
 samples/bpf/tracex1_user.c          | 37 +++++++++++++---
 samples/bpf/tracex2_kern.c          | 27 ++++++------
 samples/bpf/tracex2_user.c          | 51 ++++++++++++++++++----
 samples/bpf/tracex3_kern.c          | 24 +++++------
 samples/bpf/tracex3_user.c          | 61 +++++++++++++++++++-------
 samples/bpf/tracex4_kern.c          | 12 +++---
 samples/bpf/tracex4_user.c          | 51 +++++++++++++++++-----
 samples/bpf/tracex5_kern.c          | 14 +++---
 samples/bpf/tracex5_user.c          | 66 +++++++++++++++++++++++++----
 samples/bpf/tracex6_kern.c          | 38 +++++++++--------
 samples/bpf/tracex6_user.c          | 49 ++++++++++++++++++---
 samples/bpf/tracex7_user.c          | 39 +++++++++++++----
 samples/bpf/xdp_redirect_cpu_user.c |  5 +--
 22 files changed, 455 insertions(+), 201 deletions(-)
 create mode 100644 samples/bpf/trace_common.h

-- 
2.25.1