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authorJesper Dangaard Brouer <brouer@redhat.com>2018-05-14 15:42:32 +0200
committerAlexei Starovoitov <ast@kernel.org>2018-05-14 23:02:58 -0700
commitb7a27c3aafa252d1e416c223cb97c123de4ed28a (patch)
tree74a4e7001207d4d670159073d7438986466216a2
parent542228384888f5ad11fa6ffd59947a29a1f4452e (diff)
downloadlinux-b7a27c3aafa252d1e416c223cb97c123de4ed28a.tar.bz2
bpf, doc: howto use/run the BPF selftests
I always forget howto run the BPF selftests. Thus, lets add that info to the QA document. Documentation was based on Cilium's documentation: http://cilium.readthedocs.io/en/latest/bpf/#verifying-the-setup Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
-rw-r--r--Documentation/bpf/bpf_devel_QA.rst29
1 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/bpf/bpf_devel_QA.rst b/Documentation/bpf/bpf_devel_QA.rst
index 2254bdeae990..0e7c1d946e83 100644
--- a/Documentation/bpf/bpf_devel_QA.rst
+++ b/Documentation/bpf/bpf_devel_QA.rst
@@ -417,6 +417,33 @@ submitted by the BPF maintainers to the stable maintainers.
Testing patches
===============
+Q: How to run BPF selftests
+---------------------------
+A: After you have booted into the newly compiled kernel, navigate to
+the BPF selftests_ suite in order to test BPF functionality (current
+working directory points to the root of the cloned git tree)::
+
+ $ cd tools/testing/selftests/bpf/
+ $ make
+
+To run the verifier tests::
+
+ $ sudo ./test_verifier
+
+The verifier tests print out all the current checks being
+performed. The summary at the end of running all tests will dump
+information of test successes and failures::
+
+ Summary: 418 PASSED, 0 FAILED
+
+In order to run through all BPF selftests, the following command is
+needed::
+
+ $ sudo make run_tests
+
+See the kernels selftest `Documentation/dev-tools/kselftest.rst`_
+document for further documentation.
+
Q: Which BPF kernel selftests version should I run my kernel against?
---------------------------------------------------------------------
A: If you run a kernel ``xyz``, then always run the BPF kernel selftests
@@ -607,5 +634,7 @@ when:
.. _netdev FAQ: ../networking/netdev-FAQ.txt
.. _samples/bpf/: ../../samples/bpf/
.. _selftests: ../../tools/testing/selftests/bpf/
+.. _Documentation/dev-tools/kselftest.rst:
+ https://www.kernel.org/doc/html/latest/dev-tools/kselftest.html
Happy BPF hacking!