Merge tag 'linux-kselftest-kunit-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kunit updates from Shuah Khan:

 - Add a generic kunit_resource API extending it to support resources
   that are passed in to kunit in addition kunit allocated resources. In
   addition, KUnit resources are now refcounted to avoid passed in
   resources being released while in use by kunit.

 - Add support for named resources.

 - Important bug fixes from Brendan Higgins and Will Chen

* tag 'linux-kselftest-kunit-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kunit: tool: fix improper treatment of file location
  kunit: tool: fix broken default args in unit tests
  kunit: capture stderr on all make subprocess calls
  Documentation: kunit: Remove references to --defconfig
  kunit: add support for named resources
  kunit: generalize kunit_resource API beyond allocated resources

1 files changed, 91 insertions, 20 deletions

diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c
index 4f3d36a72f8f..69f902440a0e 100644
--- a/lib/kunit/kunit-test.c
+++ b/lib/kunit/kunit-test.c
@@ -118,14 +118,14 @@ static int fake_resource_init(struct kunit_resource *res, void *context)
 {
 	struct kunit_test_resource_context *ctx = context;
 
-	res->allocation = &ctx->is_resource_initialized;
+	res->data = &ctx->is_resource_initialized;
 	ctx->is_resource_initialized = true;
 	return 0;
 }
 
 static void fake_resource_free(struct kunit_resource *res)
 {
-	bool *is_resource_initialized = res->allocation;
+	bool *is_resource_initialized = res->data;
 
 	*is_resource_initialized = false;
 }
@@ -154,11 +154,21 @@ static void kunit_resource_test_alloc_resource(struct kunit *test)
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, res);
 	KUNIT_EXPECT_PTR_EQ(test,
 			    &ctx->is_resource_initialized,
-			    (bool *) res->allocation);
+			    (bool *)res->data);
 	KUNIT_EXPECT_TRUE(test, list_is_last(&res->node, &ctx->test.resources));
 	KUNIT_EXPECT_PTR_EQ(test, free, res->free);
+
+	kunit_put_resource(res);
 }
 
+/*
+ * Note: tests below use kunit_alloc_and_get_resource(), so as a consequence
+ * they have a reference to the associated resource that they must release
+ * via kunit_put_resource().  In normal operation, users will only
+ * have to do this for cases where they use kunit_find_resource(), and the
+ * kunit_alloc_resource() function will be used (which does not take a
+ * resource reference).
+ */
 static void kunit_resource_test_destroy_resource(struct kunit *test)
 {
 	struct kunit_test_resource_context *ctx = test->priv;
@@ -169,11 +179,12 @@ static void kunit_resource_test_destroy_resource(struct kunit *test)
 			GFP_KERNEL,
 			ctx);
 
+	kunit_put_resource(res);
+
 	KUNIT_ASSERT_FALSE(test,
-			   kunit_resource_destroy(&ctx->test,
+			   kunit_destroy_resource(&ctx->test,
 						  kunit_resource_instance_match,
-						  res->free,
-						  res->allocation));
+						  res->data));
 
 	KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
 	KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
@@ -191,6 +202,7 @@ static void kunit_resource_test_cleanup_resources(struct kunit *test)
 							    fake_resource_free,
 							    GFP_KERNEL,
 							    ctx);
+		kunit_put_resource(resources[i]);
 	}
 
 	kunit_cleanup(&ctx->test);
@@ -221,14 +233,14 @@ static int fake_resource_2_init(struct kunit_resource *res, void *context)
 
 	KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 2);
 
-	res->allocation = ctx;
+	res->data = ctx;
 
 	return 0;
 }
 
 static void fake_resource_2_free(struct kunit_resource *res)
 {
-	struct kunit_test_resource_context *ctx = res->allocation;
+	struct kunit_test_resource_context *ctx = res->data;
 
 	KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 2);
 }
@@ -236,23 +248,26 @@ static void fake_resource_2_free(struct kunit_resource *res)
 static int fake_resource_1_init(struct kunit_resource *res, void *context)
 {
 	struct kunit_test_resource_context *ctx = context;
+	struct kunit_resource *res2;
 
-	kunit_alloc_and_get_resource(&ctx->test,
-				     fake_resource_2_init,
-				     fake_resource_2_free,
-				     GFP_KERNEL,
-				     ctx);
+	res2 = kunit_alloc_and_get_resource(&ctx->test,
+					    fake_resource_2_init,
+					    fake_resource_2_free,
+					    GFP_KERNEL,
+					    ctx);
 
 	KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 1);
 
-	res->allocation = ctx;
+	res->data = ctx;
+
+	kunit_put_resource(res2);
 
 	return 0;
 }
 
 static void fake_resource_1_free(struct kunit_resource *res)
 {
-	struct kunit_test_resource_context *ctx = res->allocation;
+	struct kunit_test_resource_context *ctx = res->data;
 
 	KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 1);
 }
@@ -265,13 +280,14 @@ static void fake_resource_1_free(struct kunit_resource *res)
 static void kunit_resource_test_proper_free_ordering(struct kunit *test)
 {
 	struct kunit_test_resource_context *ctx = test->priv;
+	struct kunit_resource *res;
 
 	/* fake_resource_1 allocates a fake_resource_2 in its init. */
-	kunit_alloc_and_get_resource(&ctx->test,
-				     fake_resource_1_init,
-				     fake_resource_1_free,
-				     GFP_KERNEL,
-				     ctx);
+	res = kunit_alloc_and_get_resource(&ctx->test,
+					   fake_resource_1_init,
+					   fake_resource_1_free,
+					   GFP_KERNEL,
+					   ctx);
 
 	/*
 	 * Since fake_resource_2_init calls KUNIT_RESOURCE_TEST_MARK_ORDER
@@ -281,6 +297,8 @@ static void kunit_resource_test_proper_free_ordering(struct kunit *test)
 	KUNIT_EXPECT_EQ(test, ctx->allocate_order[0], 2);
 	KUNIT_EXPECT_EQ(test, ctx->allocate_order[1], 1);
 
+	kunit_put_resource(res);
+
 	kunit_cleanup(&ctx->test);
 
 	/*
@@ -292,6 +310,57 @@ static void kunit_resource_test_proper_free_ordering(struct kunit *test)
 	KUNIT_EXPECT_EQ(test, ctx->free_order[1], 2);
 }
 
+static void kunit_resource_test_static(struct kunit *test)
+{
+	struct kunit_test_resource_context ctx;
+	struct kunit_resource res;
+
+	KUNIT_EXPECT_EQ(test, kunit_add_resource(test, NULL, NULL, &res, &ctx),
+			0);
+
+	KUNIT_EXPECT_PTR_EQ(test, res.data, (void *)&ctx);
+
+	kunit_cleanup(test);
+
+	KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
+}
+
+static void kunit_resource_test_named(struct kunit *test)
+{
+	struct kunit_resource res1, res2, *found = NULL;
+	struct kunit_test_resource_context ctx;
+
+	KUNIT_EXPECT_EQ(test,
+			kunit_add_named_resource(test, NULL, NULL, &res1,
+						 "resource_1", &ctx),
+			0);
+	KUNIT_EXPECT_PTR_EQ(test, res1.data, (void *)&ctx);
+
+	KUNIT_EXPECT_EQ(test,
+			kunit_add_named_resource(test, NULL, NULL, &res1,
+						 "resource_1", &ctx),
+			-EEXIST);
+
+	KUNIT_EXPECT_EQ(test,
+			kunit_add_named_resource(test, NULL, NULL, &res2,
+						 "resource_2", &ctx),
+			0);
+
+	found = kunit_find_named_resource(test, "resource_1");
+
+	KUNIT_EXPECT_PTR_EQ(test, found, &res1);
+
+	if (found)
+		kunit_put_resource(&res1);
+
+	KUNIT_EXPECT_EQ(test, kunit_destroy_named_resource(test, "resource_2"),
+			0);
+
+	kunit_cleanup(test);
+
+	KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
+}
+
 static int kunit_resource_test_init(struct kunit *test)
 {
 	struct kunit_test_resource_context *ctx =
@@ -320,6 +389,8 @@ static struct kunit_case kunit_resource_test_cases[] = {
 	KUNIT_CASE(kunit_resource_test_destroy_resource),
 	KUNIT_CASE(kunit_resource_test_cleanup_resources),
 	KUNIT_CASE(kunit_resource_test_proper_free_ordering),
+	KUNIT_CASE(kunit_resource_test_static),
+	KUNIT_CASE(kunit_resource_test_named),
 	{}
 };