[RFC PATCH 7/8] mm/damon/core-kunit: extend damos_commit_filter_for() for wrong input

[SJ Park <sj@kernel.org>]

damos_commit_filter_for() supposes damos_commit_filter() to always
succeed with given inputs.  damos_commit_filter() could return an error
for invalid inputs.  Existing callers always pass only valid inputs, but
they may pass invalid inputs in future, for test purposes.  Extend the
function to be able to be used for wrong inputs-caused error testing.

Signed-off-by: SJ Park <sj@kernel.org>
---
 mm/damon/tests/core-kunit.h | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h
index a47a5cdf285c8..c9941f3bfb42b 100644
--- a/mm/damon/tests/core-kunit.h
+++ b/mm/damon/tests/core-kunit.h
@@ -1127,9 +1127,15 @@ static void damos_test_commit_dests(struct kunit *test)
 }
 
 static void damos_test_commit_filter_for(struct kunit *test,
-		struct damos_filter *dst, struct damos_filter *src)
+		struct damos_filter *dst, struct damos_filter *src,
+		bool expect_fail)
 {
-	damos_commit_filter(dst, src);
+	int err;
+
+	err = damos_commit_filter(dst, src);
+	KUNIT_EXPECT_EQ(test, err != 0, expect_fail);
+	if (expect_fail)
+		return;
 	KUNIT_EXPECT_EQ(test, dst->type, src->type);
 	KUNIT_EXPECT_EQ(test, dst->matching, src->matching);
 	KUNIT_EXPECT_EQ(test, dst->allow, src->allow);
@@ -1168,47 +1174,47 @@ static void damos_test_commit_filter(struct kunit *test)
 			.type = DAMOS_FILTER_TYPE_ANON,
 			.matching = true,
 			.allow = true,
-			});
+			}, false);
 	damos_test_commit_filter_for(test, &dst,
 			&(struct damos_filter){
 			.type = DAMOS_FILTER_TYPE_MEMCG,
 			.matching = false,
 			.allow = false,
 			.memcg_id = 123,
-			});
+			}, false);
 	damos_test_commit_filter_for(test, &dst,
 			&(struct damos_filter){
 			.type = DAMOS_FILTER_TYPE_YOUNG,
 			.matching = true,
 			.allow = true,
-			});
+			}, false);
 	damos_test_commit_filter_for(test, &dst,
 			&(struct damos_filter){
 			.type = DAMOS_FILTER_TYPE_HUGEPAGE_SIZE,
 			.matching = false,
 			.allow = false,
 			.sz_range = {.min = 234, .max = 345},
-			});
+			}, false);
 	damos_test_commit_filter_for(test, &dst,
 			&(struct damos_filter){
 			.type = DAMOS_FILTER_TYPE_UNMAPPED,
 			.matching = true,
 			.allow = true,
-			});
+			}, false);
 	damos_test_commit_filter_for(test, &dst,
 			&(struct damos_filter){
 			.type = DAMOS_FILTER_TYPE_ADDR,
 			.matching = false,
 			.allow = false,
 			.addr_range = {.start = 456, .end = 567},
-			});
+			}, false);
 	damos_test_commit_filter_for(test, &dst,
 			&(struct damos_filter){
 			.type = DAMOS_FILTER_TYPE_TARGET,
 			.matching = true,
 			.allow = true,
 			.target_idx = 6,
-			});
+			}, false);
 }
 
 static void damos_test_help_initailize_scheme(struct damos *scheme)
-- 
2.47.3