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From: Andrii Nakryiko <andrii@kernel.org>
To: <bpf@vger.kernel.org>, <ast@kernel.org>, <daniel@iogearbox.net>
Cc: <andrii@kernel.org>, <kernel-team@fb.com>
Subject: [PATCH bpf-next 0/4] libbpf: add legacy uprobe support
Date: Mon, 20 Sep 2021 16:16:13 -0700	[thread overview]
Message-ID: <20210920231617.3141867-1-andrii@kernel.org> (raw)

Implement libbpf support for attaching uprobes/uretprobes using legacy
tracefs interfaces. This is a logical complement to recently landed legacy
kprobe support ([0]). This patch refactors existing legacy kprobe code to be more
uniform with uprobe code as well, making the logic easier to compare and
follow.

This patch set also fixes two bugs recently found by Coverity in legacy kprobe
handling code, and thus subsumes previously submitted two patches ([1]):
original patch #1 is kept as is, while original patch #2 was dropped because
patch #3 of the current series refactors and fixes affected code.

  [0] https://patchwork.kernel.org/project/netdevbpf/patch/20210912064844.3181742-1-rafaeldtinoco@gmail.com/
  [1] https://patchwork.kernel.org/project/netdevbpf/list/?series=549977&state=*

Andrii Nakryiko (4):
  libbpf: fix memory leak in legacy kprobe attach logic
  selftests/bpf: adopt attach_probe selftest to work on old kernels
  libbpf: refactor and simplify legacy kprobe code
  libbpf: add legacy uprobe attaching support

 tools/lib/bpf/libbpf.c                        | 297 +++++++++++++-----
 tools/lib/bpf/libbpf.h                        |   2 +-
 .../selftests/bpf/prog_tests/attach_probe.c   |  16 +-
 3 files changed, 228 insertions(+), 87 deletions(-)

-- 
2.30.2


             reply	other threads:[~2021-09-20 23:18 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-20 23:16 Andrii Nakryiko [this message]
2021-09-20 23:16 ` [PATCH bpf-next 1/4] libbpf: fix memory leak in legacy kprobe attach logic Andrii Nakryiko
2021-09-20 23:16 ` [PATCH bpf-next 2/4] selftests/bpf: adopt attach_probe selftest to work on old kernels Andrii Nakryiko
2021-09-21 20:34   ` Alexei Starovoitov
2021-09-21 20:46     ` Andrii Nakryiko
2021-09-21 20:48       ` Alexei Starovoitov
2021-09-21 20:53         ` Andrii Nakryiko
2021-09-20 23:16 ` [PATCH bpf-next 3/4] libbpf: refactor and simplify legacy kprobe code Andrii Nakryiko
2021-09-20 23:16 ` [PATCH bpf-next 4/4] libbpf: add legacy uprobe attaching support Andrii Nakryiko

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