[PATCH v2 bpf-next 0/3] libbpf: add perf buffer abstraction and API

[Andrii Nakryiko <andriin@xxxxxx>]

This patchset adds a high-level API for setting up and polling perf buffers
associated with BPF_MAP_TYPE_PERF_EVENT_ARRAY map. Details of APIs are
described in corresponding commit.

Patch #1 adds a set of APIs to set up and work with perf buffer.
Patch #2 enhances libbpf to supprot auto-setting PERF_EVENT_ARRAY map size.
Patch #3 adds test.

Andrii Nakryiko (3):
  libbpf: add perf buffer API
  libbpf: auto-set PERF_EVENT_ARRAY size to number of CPUs
  selftests/bpf: test perf buffer API

 tools/lib/bpf/libbpf.c                        | 299 +++++++++++++++++-
 tools/lib/bpf/libbpf.h                        |  12 +
 tools/lib/bpf/libbpf.map                      |   5 +-
 .../selftests/bpf/prog_tests/perf_buffer.c    |  86 +++++
 .../selftests/bpf/progs/test_perf_buffer.c    |  29 ++
 5 files changed, 429 insertions(+), 2 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/perf_buffer.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_perf_buffer.c

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2.17.1