Merge branch 'bpf-libbpf-perf-rb-api'

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Andrii Nakryiko says:

====================
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 support auto-setting PERF_EVENT_ARRAY map size.
Patch #3 adds test.
Patch #4 converts bpftool map event_pipe to new API.
Patch #5 updates README to mention perf_buffer_ prefix.

v6->v7:
- __x64_ syscall prefix (Yonghong);
v5->v6:
- fix C99 for loop variable initialization usage (Yonghong);
v4->v5:
- initialize perf_buffer_raw_opts in bpftool map event_pipe (Jakub);
- add perf_buffer_ to README;
v3->v4:
- fixed bpftool event_pipe cmd error handling (Jakub);
v2->v3:
- added perf_buffer__new_raw for more low-level control;
- converted bpftool map event_pipe to new API (Daniel);
- fixed bug with error handling in create_maps (Song);
v1->v2:
- add auto-sizing of PERF_EVENT_ARRAY maps;
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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This commit is contained in:

Daniel Borkmann 2019-07-08 15:35:44 +02:00

parent c3ec002e63 cd07a95f9b

commit d2850ce0bd

7 changed files with 634 additions and 145 deletions

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201

tools/bpf/bpftool/map_perf_ring.c

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3

tools/lib/bpf/README.rst

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397

tools/lib/bpf/libbpf.c

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49

tools/lib/bpf/libbpf.h

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4

tools/lib/bpf/libbpf.map

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100

tools/testing/selftests/bpf/prog_tests/perf_buffer.c

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25

tools/testing/selftests/bpf/progs/test_perf_buffer.c

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