bpf: add initial suite for selftests

Add a start of a test suite for kernel selftests. This moves test_verifier
and test_maps over to tools/testing/selftests/bpf/ along with various
code improvements and also adds a script for invoking test_bpf module.
The test suite can simply be run via selftest framework, f.e.:

  # cd tools/testing/selftests/bpf/
  # make
  # make run_tests

Both test_verifier and test_maps were kind of misplaced in samples/bpf/
directory and we were looking into adding them to selftests for a while
now, so it can be picked up by kbuild bot et al and hopefully also get
more exposure and thus new test case additions.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
new file mode 100644
index 000000000000..4761e2d65ab8
--- /dev/null
+++ b/tools/testing/selftests/bpf/Makefile
@@ -0,0 +1,13 @@
+CFLAGS += -Wall -O2
+
+test_objs = test_verifier test_maps
+
+TEST_PROGS := test_verifier test_maps test_kmod.sh
+TEST_FILES := $(test_objs)
+
+all: $(test_objs)
+
+include ../lib.mk
+
+clean:
+	$(RM) $(test_objs)