mm/damon/tests/core-kunit: add damon_commit_target_regions() test

Add a new test for damon_commit_target_regions().

Link: https://lkml.kernel.org/r/20251111184415.141757-12-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h
index c71c10f9e0594cca3ae8c36ee9eef53d8e701172..0d2d8cda863130a4a599071584158b71a4e03480 100644 (file)
--- a/mm/damon/tests/core-kunit.h
+++ b/mm/damon/tests/core-kunit.h
@@ -964,6 +964,70 @@ static void damos_test_commit(struct kunit *test)
                        });
 }
 
+static struct damon_target *damon_test_help_setup_target(
+               unsigned long region_start_end[][2], int nr_regions)
+{
+       struct damon_target *t;
+       struct damon_region *r;
+       int i;
+
+       t = damon_new_target();
+       if (!t)
+               return NULL;
+       for (i = 0; i < nr_regions; i++) {
+               r = damon_new_region(region_start_end[i][0],
+                               region_start_end[i][1]);
+               if (!r) {
+                       damon_free_target(t);
+                       return NULL;
+               }
+               damon_add_region(r, t);
+       }
+       return t;
+}
+
+static void damon_test_commit_target_regions_for(struct kunit *test,
+               unsigned long dst_start_end[][2], int nr_dst_regions,
+               unsigned long src_start_end[][2], int nr_src_regions,
+               unsigned long expect_start_end[][2], int nr_expect_regions)
+{
+       struct damon_target *dst_target, *src_target;
+       struct damon_region *r;
+       int i;
+
+       dst_target = damon_test_help_setup_target(dst_start_end, nr_dst_regions);
+       if (!dst_target)
+               kunit_skip(test, "dst target setup fail");
+       src_target = damon_test_help_setup_target(src_start_end, nr_src_regions);
+       if (!src_target) {
+               damon_free_target(dst_target);
+               kunit_skip(test, "src target setup fail");
+       }
+       damon_commit_target_regions(dst_target, src_target, 1);
+       i = 0;
+       damon_for_each_region(r, dst_target) {
+               KUNIT_EXPECT_EQ(test, r->ar.start, expect_start_end[i][0]);
+               KUNIT_EXPECT_EQ(test, r->ar.end, expect_start_end[i][1]);
+               i++;
+       }
+       KUNIT_EXPECT_EQ(test, damon_nr_regions(dst_target), nr_expect_regions);
+       KUNIT_EXPECT_EQ(test, i, nr_expect_regions);
+       damon_free_target(dst_target);
+       damon_free_target(src_target);
+}
+
+static void damon_test_commit_target_regions(struct kunit *test)
+{
+       damon_test_commit_target_regions_for(test,
+                       (unsigned long[][2]) {{3, 8}, {8, 10}}, 2,
+                       (unsigned long[][2]) {{4, 6}}, 1,
+                       (unsigned long[][2]) {{4, 6}}, 1);
+       damon_test_commit_target_regions_for(test,
+                       (unsigned long[][2]) {{3, 8}, {8, 10}}, 2,
+                       (unsigned long[][2]) {}, 0,
+                       (unsigned long[][2]) {{3, 8}, {8, 10}}, 2);
+}
+
 static void damos_test_filter_out(struct kunit *test)
 {
        struct damon_target *t;
@@ -1170,6 +1234,7 @@ static struct kunit_case damon_test_cases[] = {
        KUNIT_CASE(damos_test_commit_dests),
        KUNIT_CASE(damos_test_commit_filter),
        KUNIT_CASE(damos_test_commit),
+       KUNIT_CASE(damon_test_commit_target_regions),
        KUNIT_CASE(damos_test_filter_out),
        KUNIT_CASE(damon_test_feed_loop_next_input),
        KUNIT_CASE(damon_test_set_filters_default_reject),