[PATCH bpf-next 0/4] transition sockmap testing to test_progs

[John Fastabend <john.fastabend@gmail.com>]

Its much easier to write and read tests than it was when sockmap was
originally created. At that time we created a test_sockmap prog that
did sockmap tests. But, its showing its age now. For example it reads
user vars out of maps, is hard to run targetted tests, has a different
format from the familiar test_progs and so on.

I recently thought there was an issue with pop helpers so I created
some tests to try and track it down. It turns out it was a bug in the
BPF program we had not the kernel. But, I think it makes sense to
start deprecating test_sockmap and converting these to the nicer
test_progs.

So this is a first round of test_prog tests for sockmap cork and
pop helpers. I'll add push and pull tests shortly. I think its fine,
maybe preferred to review smaller patchsets, to send these
incrementally as I get them created.

Thanks!

John Fastabend (4):
  bpf: Add modern test for sk_msg prog pop msg header
  bpf: sockmap, add a sendmsg test so we can check that path
  bpf: sockmap, add a cork to force buffering of the scatterlist
  bpf: sockmap test cork and pop combined

 .../bpf/prog_tests/sockmap_helpers.h          |  18 +
 .../bpf/prog_tests/sockmap_msg_helpers.c      | 351 ++++++++++++++++++
 .../bpf/progs/test_sockmap_msg_helpers.c      |  67 ++++
 3 files changed, 436 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/sockmap_msg_helpers.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_sockmap_msg_helpers.c

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2.33.0