kunit: add is_init test attribute

Add is_init test attribute of type bool. Add to_string, get, and filter
methods to lib/kunit/attributes.c.

Mark each of the tests in the init section with the is_init=true attribute.

Add is_init to the attributes documentation.
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

Documentation/dev-tools/kunit/running_tips.rst

@@ -428,3 +428,10 @@ This attribute indicates the name of the module associated with the test.
 
 This attribute is automatically saved as a string and is printed for each suite.
 Tests can also be filtered using this attribute.
+
+``is_init``
+
+This attribute indicates whether the test uses init data or functions.
+
+This attribute is automatically saved as a boolean and tests can also be
+filtered using this attribute.

include/kunit/test.h

@@ -253,6 +253,7 @@ struct kunit_suite {
 	struct dentry *debugfs;
 	struct string_stream *log;
 	int suite_init_err;
+	bool is_init;
 };
 
 /* Stores an array of suites, end points one past the end */

lib/kunit/attributes.c

@@ -58,6 +58,16 @@ static const char *attr_enum_to_string(void *attr, const char * const str_list[]
 	return str_list[val];
 }
 
+static const char *attr_bool_to_string(void *attr, bool *to_free)
+{
+	bool val = (bool)attr;
+
+	*to_free = false;
+	if (val)
+		return "true";
+	return "false";
+}
+
 static const char *attr_speed_to_string(void *attr, bool *to_free)
 {
 	return attr_enum_to_string(attr, speed_str_list, to_free);
@@ -166,6 +176,37 @@ static int attr_string_filter(void *attr, const char *input, int *err)
 	return false;
 }
 
+static int attr_bool_filter(void *attr, const char *input, int *err)
+{
+	int i, input_int = -1;
+	long val = (long)attr;
+	const char *input_str = NULL;
+
+	for (i = 0; input[i]; i++) {
+		if (!strchr(op_list, input[i])) {
+			input_str = input + i;
+			break;
+		}
+	}
+
+	if (!input_str) {
+		*err = -EINVAL;
+		pr_err("kunit executor: filter value not found: %s\n", input);
+		return false;
+	}
+
+	if (!strcmp(input_str, "true"))
+		input_int = (int)true;
+	else if (!strcmp(input_str, "false"))
+		input_int = (int)false;
+	else {
+		*err = -EINVAL;
+		pr_err("kunit executor: invalid filter input: %s\n", input);
+		return false;
+	}
+
+	return int_filter(val, input, input_int, err);
+}
 
 /* Get Attribute Methods */
 
@@ -194,6 +235,17 @@ static void *attr_module_get(void *test_or_suite, bool is_test)
 		return (void *) "";
 }
 
+static void *attr_is_init_get(void *test_or_suite, bool is_test)
+{
+	struct kunit_suite *suite = is_test ? NULL : test_or_suite;
+	struct kunit_case *test = is_test ? test_or_suite : NULL;
+
+	if (test)
+		return ((void *) NULL);
+	else
+		return ((void *) suite->is_init);
+}
+
 /* List of all Test Attributes */
 
 static struct kunit_attr kunit_attr_list[] = {
@@ -212,6 +264,14 @@ static struct kunit_attr kunit_attr_list[] = {
 		.filter = attr_string_filter,
 		.attr_default = (void *)"",
 		.print = PRINT_SUITE,
+	},
+	{
+		.name = "is_init",
+		.get_attr = attr_is_init_get,
+		.to_string = attr_bool_to_string,
+		.filter = attr_bool_filter,
+		.attr_default = (void *)false,
+		.print = PRINT_SUITE,
 	}
 };
 

lib/kunit/executor.c

@@ -300,6 +300,7 @@ struct kunit_suite_set kunit_merge_suite_sets(struct kunit_suite_set init_suite_
 	struct kunit_suite_set total_suite_set = {NULL, NULL};
 	struct kunit_suite **total_suite_start = NULL;
 	size_t init_num_suites, num_suites, suite_size;
+	int i = 0;
 
 	init_num_suites = init_suite_set.end - init_suite_set.start;
 	num_suites = suite_set.end - suite_set.start;
@@ -310,8 +311,11 @@ struct kunit_suite_set kunit_merge_suite_sets(struct kunit_suite_set init_suite_
 	if (!total_suite_start)
 		return total_suite_set;
 
-	/* Append init suites and then all other kunit suites */
+	/* Append and mark init suites and then append all other kunit suites */
 	memcpy(total_suite_start, init_suite_set.start, init_num_suites * suite_size);
+	for (i = 0; i < init_num_suites; i++)
+		total_suite_start[i]->is_init = true;
+
 	memcpy(total_suite_start + init_num_suites, suite_set.start, num_suites * suite_size);
 
 	/* Set kunit suite set start and end */