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-rw-r--r--mm/damon/dbgfs-test.h163
1 files changed, 163 insertions, 0 deletions
diff --git a/mm/damon/dbgfs-test.h b/mm/damon/dbgfs-test.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * DAMON Debugfs Interface Unit Tests
+ *
+ * Author: SeongJae Park <sjpark@amazon.de>
+ */
+
+#ifdef CONFIG_DAMON_DBGFS_KUNIT_TEST
+
+#ifndef _DAMON_DBGFS_TEST_H
+#define _DAMON_DBGFS_TEST_H
+
+#include <kunit/test.h>
+
+static void damon_dbgfs_test_str_to_ints(struct kunit *test)
+{
+ char *question;
+ int *answers;
+ int expected[] = {12, 35, 46};
+ ssize_t nr_integers = 0, i;
+
+ question = "123";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
+ KUNIT_EXPECT_EQ(test, 123, answers[0]);
+ kfree(answers);
+
+ question = "123abc";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
+ KUNIT_EXPECT_EQ(test, 123, answers[0]);
+ kfree(answers);
+
+ question = "a123";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
+ kfree(answers);
+
+ question = "12 35";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
+ for (i = 0; i < nr_integers; i++)
+ KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
+ kfree(answers);
+
+ question = "12 35 46";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)3, nr_integers);
+ for (i = 0; i < nr_integers; i++)
+ KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
+ kfree(answers);
+
+ question = "12 35 abc 46";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
+ for (i = 0; i < 2; i++)
+ KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
+ kfree(answers);
+
+ question = "";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
+ kfree(answers);
+
+ question = "\n";
+ answers = str_to_ints(question, strlen(question), &nr_integers);
+ KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
+ kfree(answers);
+}
+
+static void damon_dbgfs_test_set_targets(struct kunit *test)
+{
+ struct damon_ctx *ctx = dbgfs_new_ctx();
+ char buf[64];
+
+ /* Make DAMON consider target has no pid */
+ damon_select_ops(ctx, DAMON_OPS_PADDR);
+
+ dbgfs_set_targets(ctx, 0, NULL);
+ sprint_target_ids(ctx, buf, 64);
+ KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
+
+ dbgfs_set_targets(ctx, 1, NULL);
+ sprint_target_ids(ctx, buf, 64);
+ KUNIT_EXPECT_STREQ(test, (char *)buf, "42\n");
+
+ dbgfs_set_targets(ctx, 0, NULL);
+ sprint_target_ids(ctx, buf, 64);
+ KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
+
+ dbgfs_destroy_ctx(ctx);
+}
+
+static void damon_dbgfs_test_set_init_regions(struct kunit *test)
+{
+ struct damon_ctx *ctx = damon_new_ctx();
+ /* Each line represents one region in ``<target idx> <start> <end>`` */
+ char * const valid_inputs[] = {"1 10 20\n 1 20 30\n1 35 45",
+ "1 10 20\n",
+ "1 10 20\n0 39 59\n0 70 134\n 1 20 25\n",
+ ""};
+ /* Reading the file again will show sorted, clean output */
+ char * const valid_expects[] = {"1 10 20\n1 20 30\n1 35 45\n",
+ "1 10 20\n",
+ "0 39 59\n0 70 134\n1 10 20\n1 20 25\n",
+ ""};
+ char * const invalid_inputs[] = {"3 10 20\n", /* target not exists */
+ "1 10 20\n 1 14 26\n", /* regions overlap */
+ "0 10 20\n1 30 40\n 0 5 8"}; /* not sorted by address */
+ char *input, *expect;
+ int i, rc;
+ char buf[256];
+
+ damon_select_ops(ctx, DAMON_OPS_PADDR);
+
+ dbgfs_set_targets(ctx, 3, NULL);
+
+ /* Put valid inputs and check the results */
+ for (i = 0; i < ARRAY_SIZE(valid_inputs); i++) {
+ input = valid_inputs[i];
+ expect = valid_expects[i];
+
+ rc = set_init_regions(ctx, input, strnlen(input, 256));
+ KUNIT_EXPECT_EQ(test, rc, 0);
+
+ memset(buf, 0, 256);
+ sprint_init_regions(ctx, buf, 256);
+
+ KUNIT_EXPECT_STREQ(test, (char *)buf, expect);
+ }
+ /* Put invalid inputs and check the return error code */
+ for (i = 0; i < ARRAY_SIZE(invalid_inputs); i++) {
+ input = invalid_inputs[i];
+ pr_info("input: %s\n", input);
+ rc = set_init_regions(ctx, input, strnlen(input, 256));
+ KUNIT_EXPECT_EQ(test, rc, -EINVAL);
+
+ memset(buf, 0, 256);
+ sprint_init_regions(ctx, buf, 256);
+
+ KUNIT_EXPECT_STREQ(test, (char *)buf, "");
+ }
+
+ dbgfs_set_targets(ctx, 0, NULL);
+ damon_destroy_ctx(ctx);
+}
+
+static struct kunit_case damon_test_cases[] = {
+ KUNIT_CASE(damon_dbgfs_test_str_to_ints),
+ KUNIT_CASE(damon_dbgfs_test_set_targets),
+ KUNIT_CASE(damon_dbgfs_test_set_init_regions),
+ {},
+};
+
+static struct kunit_suite damon_test_suite = {
+ .name = "damon-dbgfs",
+ .test_cases = damon_test_cases,
+};
+kunit_test_suite(damon_test_suite);
+
+#endif /* _DAMON_TEST_H */
+
+#endif /* CONFIG_DAMON_KUNIT_TEST */