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
