[PATCH bpf-next v2 0/4] bpf: bpf link iterator

[Dmitrii Dolgov <9erthalion6@gmail.com>]

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