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

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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: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2022-04-29 14:37:00 -07:00 committed by akpm
parent 1f4910b3af
commit 4f540f5ab4
1 changed files with 36 additions and 0 deletions
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36
mm/damon/core-test.h
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@ -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),
{},
};