Merge branch 'Allow attaching to bare tracepoints'

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Qais Yousef says:

====================

Changes in v3:
	* Fix not returning error value correctly in
	  trigger_module_test_write() (Yonghong)
	* Add Yonghong acked-by to patch 1.

Changes in v2:
	* Fix compilation error. (Andrii)
	* Make the new test use write() instead of read() (Andrii)

Add some missing glue logic to teach bpf about bare tracepoints - tracepoints
without any trace event associated with them.

Bare tracepoints are declare with DECLARE_TRACE(). Full tracepoints are declare
with TRACE_EVENT().

BPF can attach to these tracepoints as RAW_TRACEPOINT() only as there're no
events in tracefs created with them.
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Alexei Starovoitov 2021-01-19 13:00:50 -08:00

parent 86e6b4e993 407be92206

commit 71ee10e267

7 changed files with 85 additions and 3 deletions

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6

Documentation/bpf/bpf_design_QA.rst

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12

include/trace/bpf_probe.h

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6

tools/testing/selftests/bpf/bpf_testmod/bpf_testmod-events.h

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21

tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c

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6

tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.h

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27

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

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10

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

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