Commit 4f540f5a authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

mm/damon/core-test: add a kunit test case for ops registration 

This commit adds a simple kunit test case for DAMON operations
registration feature.

Link: https://lkml.kernel.org/r/20220419122225.290518-1-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 1f4910b3

mm/damon/core-test.h

+36 −0
Original line number Diff line number Diff line
@@ -232,6 +232,41 @@ static void damon_test_split_regions_of(struct kunit *test) 
	damon_destroy_ctx(c);

}



static void damon_test_ops_registration(struct kunit *test)

{

	struct damon_ctx *c = damon_new_ctx();

	struct damon_operations ops, bak;



	/* DAMON_OPS_{V,P}ADDR are registered on subsys_initcall */

	KUNIT_EXPECT_EQ(test, damon_select_ops(c, DAMON_OPS_VADDR), 0);

	KUNIT_EXPECT_EQ(test, damon_select_ops(c, DAMON_OPS_PADDR), 0);



	/* Double-registration is prohibited */

	ops.id = DAMON_OPS_VADDR;

	KUNIT_EXPECT_EQ(test, damon_register_ops(&ops), -EINVAL);

	ops.id = DAMON_OPS_PADDR;

	KUNIT_EXPECT_EQ(test, damon_register_ops(&ops), -EINVAL);



	/* Unknown ops id cannot be registered */

	KUNIT_EXPECT_EQ(test, damon_select_ops(c, NR_DAMON_OPS), -EINVAL);



	/* Registration should success after unregistration */

	mutex_lock(&damon_ops_lock);

	bak = damon_registered_ops[DAMON_OPS_VADDR];

	damon_registered_ops[DAMON_OPS_VADDR] = (struct damon_operations){};

	mutex_unlock(&damon_ops_lock);



	ops.id = DAMON_OPS_VADDR;

	KUNIT_EXPECT_EQ(test, damon_register_ops(&ops), 0);



	mutex_lock(&damon_ops_lock);

	damon_registered_ops[DAMON_OPS_VADDR] = bak;

	mutex_unlock(&damon_ops_lock);



	/* Check double-registration failure again */

	KUNIT_EXPECT_EQ(test, damon_register_ops(&ops), -EINVAL);

}



static struct kunit_case damon_test_cases[] = {

	KUNIT_CASE(damon_test_target),

	KUNIT_CASE(damon_test_regions),
@@ -240,6 +275,7 @@ static struct kunit_case damon_test_cases[] = { 
	KUNIT_CASE(damon_test_merge_two),

	KUNIT_CASE(damon_test_merge_regions_of),

	KUNIT_CASE(damon_test_split_regions_of),

	KUNIT_CASE(damon_test_ops_registration),

	{},

};