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Message-Id: <20250407-kunit-kselftests-v2-9-454114e287fd@linutronix.de>
Date: Mon, 07 Apr 2025 09:42:46 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Masahiro Yamada <masahiroy@...nel.org>,
Nathan Chancellor <nathan@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>, Willy Tarreau <w@....eu>,
Thomas Weißschuh <linux@...ssschuh.net>,
Brendan Higgins <brendan.higgins@...ux.dev>,
David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>,
Shuah Khan <shuah@...nel.org>, Jonathan Corbet <corbet@....net>,
Nicolas Schier <nicolas.schier@...ux.dev>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
linux-doc@...r.kernel.org,
Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH v2 09/11] kunit: uapi: Add example for UAPI tests
Extend the example to show how to run a userspace executable.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
lib/kunit/.kunitconfig | 2 ++
lib/kunit/Makefile | 9 ++++++++-
lib/kunit/kunit-example-test.c | 15 +++++++++++++++
lib/kunit/kunit-example-uapi.c | 22 ++++++++++++++++++++++
4 files changed, 47 insertions(+), 1 deletion(-)
diff --git a/lib/kunit/.kunitconfig b/lib/kunit/.kunitconfig
index 9235b7d42d389d2c7bf912546c7bb084eae99235..b7433e691563a3a8442db69874dea88f3b607332 100644
--- a/lib/kunit/.kunitconfig
+++ b/lib/kunit/.kunitconfig
@@ -1,3 +1,5 @@
CONFIG_KUNIT=y
+CONFIG_SHMEM=y
+CONFIG_TMPFS=y
CONFIG_KUNIT_TEST=y
CONFIG_KUNIT_EXAMPLE_TEST=y
diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile
index 989933dab9ad2267f376db470b876ce2a88711b4..1b6be12676f89cafa34f0093d8136b36f4cf5532 100644
--- a/lib/kunit/Makefile
+++ b/lib/kunit/Makefile
@@ -30,4 +30,11 @@ obj-$(CONFIG_KUNIT_TEST) += string-stream-test.o
obj-$(CONFIG_KUNIT_TEST) += assert_test.o
endif
-obj-$(CONFIG_KUNIT_EXAMPLE_TEST) += kunit-example-test.o
+userprogs += kunit-example-uapi
+kunit-example-uapi-userccflags := -static
+kunit-example-uapi-nolibc := $(CONFIG_ARCH_HAS_NOLIBC)
+blobs += kunit-example-uapi.blob.o
+
+obj-$(CONFIG_KUNIT_EXAMPLE_TEST) += kunit-example-mod.o
+kunit-example-mod-y += kunit-example-test.o
+kunit-example-mod-$(CONFIG_KUNIT_UAPI) += kunit-example-uapi.blob.o
diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c
index 3056d6bc705d0a8f196f0f4412e679dbb0e03114..b2681a6e047dfd6fea4a7cca60e81651d09c2eae 100644
--- a/lib/kunit/kunit-example-test.c
+++ b/lib/kunit/kunit-example-test.c
@@ -6,8 +6,11 @@
* Author: Brendan Higgins <brendanhiggins@...gle.com>
*/
+#include <linux/blob.h>
+
#include <kunit/test.h>
#include <kunit/static_stub.h>
+#include <kunit/uapi.h>
/*
* This is the most fundamental element of KUnit, the test case. A test case
@@ -277,6 +280,17 @@ static void example_slow_test(struct kunit *test)
KUNIT_EXPECT_EQ(test, 1 + 1, 2);
}
+/*
+ * This test shows the usage of UAPI tests.
+ */
+static void example_uapi_test(struct kunit *test)
+{
+ if (IS_ENABLED(CONFIG_KUNIT_UAPI))
+ kunit_uapi_run_kselftest(test, BLOB(kunit_example_uapi));
+ else
+ kunit_skip(test, "CONFIG_KUNIT_UAPI is not enabled");
+}
+
/*
* Here we make a list of all the test cases we want to add to the test suite
* below.
@@ -297,6 +311,7 @@ static struct kunit_case example_test_cases[] = {
KUNIT_CASE(example_priv_test),
KUNIT_CASE_PARAM(example_params_test, example_gen_params),
KUNIT_CASE_SLOW(example_slow_test),
+ KUNIT_CASE(example_uapi_test),
{}
};
diff --git a/lib/kunit/kunit-example-uapi.c b/lib/kunit/kunit-example-uapi.c
new file mode 100644
index 0000000000000000000000000000000000000000..4ce657050dd4a576632a41ca0309c4cb5134ce14
--- /dev/null
+++ b/lib/kunit/kunit-example-uapi.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KUnit Userspace example test.
+ *
+ * Copyright (C) 2025, Linutronix GmbH.
+ * Author: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
+ *
+ * This is *userspace* code.
+ */
+
+#include "../../tools/testing/selftests/kselftest.h"
+
+int main(void)
+{
+ ksft_print_header();
+ ksft_set_plan(4);
+ ksft_test_result_pass("userspace test 1\n");
+ ksft_test_result_pass("userspace test 2\n");
+ ksft_test_result_skip("userspace test 3: some reason\n");
+ ksft_test_result_pass("userspace test 4\n");
+ ksft_finished();
+}
--
2.49.0
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