v3: address comments from Andrii:
- prune verbose error message in 1/2
- use bpf_link_create internally in 1/2
- use subtests in patch 2/2
When initial netfilter bpf program type support got added one
suggestion was to extend libbpf with a helper to ease attachment
of nf programs to the hook locations.
Add such a helper and a demo test case that attaches a dummy
program to various combinations.
I tested that the selftest fails when changing the expected
outcome (i.e., set 'success' when it should fail and v.v.).
Florian Westphal (2):
tools: libbpf: add netfilter link attach helper
selftests/bpf: Add bpf_program__attach_netfilter helper test
tools/lib/bpf/bpf.c | 6 ++
tools/lib/bpf/bpf.h | 6 ++
tools/lib/bpf/libbpf.c | 42 +++++++++
tools/lib/bpf/libbpf.h | 15 ++++
tools/lib/bpf/libbpf.map | 1 +
.../bpf/prog_tests/netfilter_link_attach.c | 88 +++++++++++++++++++
.../bpf/progs/test_netfilter_link_attach.c | 14 +++
7 files changed, 172 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/netfilter_link_attach.c
create mode 100644 tools/testing/selftests/bpf/progs/test_netfilter_link_attach.c