[RFC hid v1 09/10] selftests: hid: ensure the program is correctly pinned

From: Benjamin Tissoires
Date: Thu Nov 24 2022 - 10:19:57 EST


Turns out that if bpffs was not mounted, the test was silently passing.

So ensure it passes, but also force the mount of the bpffs in vmtest.sh
so we get passing results.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
---
tools/testing/selftests/hid/hid_bpf.c | 3 ++-
tools/testing/selftests/hid/vmtest.sh | 4 +++-
2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index 4bdd1cfa7d13..3ae544bf24fe 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c
@@ -712,7 +712,8 @@ TEST_F(hid_bpf, test_attach_detach)

/* pin the program and immediately unpin it */
#define PIN_PATH "/sys/fs/bpf/hid_first_event"
- bpf_program__pin(self->skel->progs.hid_first_event, PIN_PATH);
+ err = bpf_program__pin(self->skel->progs.hid_first_event, PIN_PATH);
+ ASSERT_OK(err) TH_LOG("error while calling bpf_program__pin");
remove(PIN_PATH);
#undef PIN_PATH
usleep(100000);
diff --git a/tools/testing/selftests/hid/vmtest.sh b/tools/testing/selftests/hid/vmtest.sh
index f124cf6b0d0f..bd60f65acb72 100755
--- a/tools/testing/selftests/hid/vmtest.sh
+++ b/tools/testing/selftests/hid/vmtest.sh
@@ -108,8 +108,10 @@ EOF
if [[ "${debug_shell}" != "yes" ]]
then
touch ${OUTPUT_DIR}/${LOG_FILE}
- command="set -o pipefail ; ${command} 2>&1 | tee ${OUTPUT_DIR}/${LOG_FILE}"
+ command="mount bpffs -t bpf /sys/fs/bpf/; set -o pipefail ; ${command} 2>&1 | tee ${OUTPUT_DIR}/${LOG_FILE}"
post_command="cat ${OUTPUT_DIR}/${LOG_FILE}"
+ else
+ command="mount bpffs -t bpf /sys/fs/bpf/; ${command}"
fi

set +e
--
2.38.1