This patch is very important to help us to debug the xdp program. At
the same time, we can make some monitoring tools to observe the kernel
status by using this trace event

李者璈 & Zheaoli

Email: lizheao940510@gmail.com
Github: https://github.com/Zheaoli


Leon Hwang [off-list ref] 于2023年7月30日周日 19:50写道：

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.

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