linux-kernel - [PATCH bpf-next v5 0/2] bpf, xdp: Add tracepoint to xdp attaching failure

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Message-ID: <20230801142621.7925-1-hffilwlqm@gmail.com>
Date:   Tue,  1 Aug 2023 22:26:19 +0800
From:   Leon Hwang <hffilwlqm@...il.com>
To:     bpf@...r.kernel.org
Cc:     ast@...nel.org, daniel@...earbox.net, john.fastabend@...il.com,
        andrii@...nel.org, martin.lau@...ux.dev, song@...nel.org,
        yonghong.song@...ux.dev, kpsingh@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, jolsa@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        hawk@...nel.org, rostedt@...dmis.org, mhiramat@...nel.org,
        mykolal@...com, shuah@...nel.org, hffilwlqm@...il.com,
        tangyeechou@...il.com, kernel-patches-bot@...com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH bpf-next v5 0/2] bpf, xdp: Add tracepoint to xdp attaching failure

This series introduces a new tracepoint in bpf_xdp_link_attach(). By
this tracepoint, error message will be captured when error happens in
dev_xdp_attach(), e.g. invalid attaching flags.

v4 -> v5:
* Initialise the extack variable.
* Fix code style issue of variable declaration lines.

v3 -> v4:
* Fix selftest-crashed issue.

Leon Hwang (2):
  bpf, xdp: add tracepoint to xdp attaching failure
  selftests/bpf: Add testcase for xdp attaching failure tracepoint

 include/trace/events/xdp.h                    | 17 +++++
 net/core/dev.c                                |  5 +-
 .../selftests/bpf/prog_tests/xdp_attach.c     | 65 +++++++++++++++++++
 .../bpf/progs/test_xdp_attach_fail.c          | 54 +++++++++++++++
 4 files changed, 140 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_attach_fail.c


base-commit: a33d978500acd8fb67efac9773ba0a8502c1ff06
-- 
2.41.0