Bpf links seem to be one of the important structures for which no iterator is provided. Such iterator could be useful in those cases when generic 'task/file' is not suitable or better performance is needed. The implementation is mostly copied from prog iterator. This time tests were executed, although I still had to exclude test_bpf_nf (failed to find BTF info for global/extern symbol 'bpf_skb_ct_lookup') -- since it's unrelated, I hope it's a minor issue. Per suggestion from the previous discussion, there is a new patch for converting CHECK to corresponding ASSERT_* macro. Such replacement is done only if the final result would be the same, e.g. CHECK with important-looking custom formatting strings are still in place -- from what I understand ASSERT_* doesn't allow to specify such format. The third small patch fixes what looks like a copy-paste error in the condition checking. Dmitrii Dolgov (4): bpf: Add bpf_link iterator selftests/bpf: Fix result check for test_bpf_hash_map selftests/bpf: Use ASSERT_* instead of CHECK selftests/bpf: Add bpf link iter test include/linux/bpf.h | 1 + kernel/bpf/Makefile | 2 +- kernel/bpf/link_iter.c | 107 +++++++ kernel/bpf/syscall.c | 19 ++ .../selftests/bpf/prog_tests/bpf_iter.c | 261 +++++++----------- tools/testing/selftests/bpf/progs/bpf_iter.h | 7 + .../selftests/bpf/progs/bpf_iter_bpf_link.c | 21 ++ 7 files changed, 261 insertions(+), 157 deletions(-) create mode 100644 kernel/bpf/link_iter.c create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_bpf_link.c -- 2.32.0
