netdev - [PATCH v2 bpf-next 0/6] Fix, clean up, and revamp selftests/bpf Makefile

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Message-ID: <20191016032949.1445888-1-andriin@fb.com>
Date:   Tue, 15 Oct 2019 20:29:43 -0700
From:   Andrii Nakryiko <andriin@...com>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <ast@...com>,
        <daniel@...earbox.net>
CC:     <andrii.nakryiko@...il.com>, <kernel-team@...com>,
        Andrii Nakryiko <andriin@...com>
Subject: [PATCH v2 bpf-next 0/6] Fix, clean up, and revamp selftests/bpf Makefile

This patch set extensively revamps selftests/bpf's Makefile to generalize test
runner concept and apply it uniformly to test_maps and test_progs test
runners, along with test_progs' few build "flavors", exercising various ways
to build BPF programs.

As we do that, we fix dependencies between various phases of test runners, and
simplify some one-off rules and dependencies currently present in Makefile.
test_progs' flavors are now built into root $(OUTPUT) directory and can be run
without any extra steps right from there. E.g., test_progs-alu32 is built and
is supposed to be run from $(OUTPUT). It will cd into alu32/ subdirectory to
load correct set of BPF object files (which are different from the ones built
for test_progs).

Outline:
- patch #1 teaches test_progs about flavor sub-directories;
- patch #2 fixes one of CO-RE tests to not depend strictly on process name;
- patch #3 changes test_maps's usage of map_tests/tests.h to be the same as
  test_progs' one;
- patch #4 adds convenient short `make test_progs`-like targets to build only
  individual tests, if necessary;
- patch #5 is a main patch in the series; it uses a bunch of make magic
  (mainly $(call) and $(eval)) to define test runner "skeleton" and apply it
  to 4 different test runners, lots more details in corresponding commit
  description;
- patch #6 does a bit of post-clean up for test_queue_map and test_stack_map
  BPF programs.

v1->v2:
- drop test_progs-native causing compilation failures due to
  __builtin_preserve_field_access, add back test_xdp.o override, which will
  now emit rule re-definition warning.


Andrii Nakryiko (6):
  selftests/bpf: teach test_progs to cd into subdir
  selftests/bpf: make CO-RE reloc test impartial to test_progs flavor
  selftests/bpf: switch test_maps to test_progs' test.h format
  selftests/bpf: add simple per-test targets to Makefile
  selftests/bpf: replace test_progs and test_maps w/ general rule
  selftests/bpf: move test_queue_stack_map.h into progs/ where it
    belongs

 tools/testing/selftests/bpf/.gitignore        |   5 +-
 tools/testing/selftests/bpf/Makefile          | 336 ++++++++++--------
 .../selftests/bpf/prog_tests/core_reloc.c     |   4 +-
 .../selftests/bpf/progs/core_reloc_types.h    |   2 +-
 .../bpf/progs/test_core_reloc_kernel.c        |   3 +-
 .../bpf/{ => progs}/test_queue_stack_map.h    |   0
 tools/testing/selftests/bpf/test_maps.c       |   8 +-
 tools/testing/selftests/bpf/test_progs.c      |  33 +-
 8 files changed, 237 insertions(+), 154 deletions(-)
 rename tools/testing/selftests/bpf/{ => progs}/test_queue_stack_map.h (100%)

-- 
2.17.1