[PATCH bpf-next 0/3] Fix libbpf's bpf_object and BPF subskel interoperability

[Andrii Nakryiko <andrii@kernel.org>]

Fix libbpf's global data map mmap()'ing logic to make BPF objects loaded
through generic bpf_object__load() API interoperable with BPF subskeleton
instantiated from such BPF object. The issue is in re-mmap()'ing of global
data maps after BPF object is loaded into kernel, which is currently done in
BPF skeleton-specific code, and should instead be done in generic and common
bpf_object_load() logic.

See patch #2 for the fix, patch #3 for the selftests.  Patch #1 is preliminary
fix for existing spin_lock selftests which currently works by accident.

Andrii Nakryiko (3):
  selftests/bpf: fix test_spin_lock_fail.c's global vars usage
  libbpf: move global data mmap()'ing into bpf_object__load()
  selftests/bpf: validate generic bpf_object and subskel APIs work
    together

 tools/lib/bpf/libbpf.c                        | 83 +++++++++----------
 .../selftests/bpf/prog_tests/subskeleton.c    | 76 ++++++++++++++++-
 .../selftests/bpf/progs/test_spin_lock_fail.c |  4 +-
 3 files changed, 117 insertions(+), 46 deletions(-)

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2.43.5