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 hffilwlqm@gmail.com 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