[PATCH 1/9] kunit: Add parent kunit for parameterized test context

Currently, KUnit parameterized tests lack a mechanism to share resources across individual test invocations because the same `struct kunit` instance is reused for each test.

This patch refactors kunit_run_tests() to provide each parameterized test with its own `struct kunit` instance. A new parent pointer is added to `struct kunit`, allowing individual parameterized tests to reference a shared parent kunit instance. Resources added to this parent will then be accessible to all individual parameter test executions.

Signed-off-by: Marie Zhussupova marievic@google.com --- include/kunit/test.h | 12 ++++++++++-- lib/kunit/test.c | 32 +++++++++++++++++++------------- 2 files changed, 29 insertions(+), 15 deletions(-)

diff --git a/include/kunit/test.h b/include/kunit/test.h index 39c768f87dc9..a42d0c8cb985 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -268,14 +268,22 @@ struct kunit_suite_set { * * @priv: for user to store arbitrary data. Commonly used to pass data * created in the init function (see &struct kunit_suite). + * @parent: for user to store data that they want to shared across + * parameterized tests. * * Used to store information about the current context under which the test * is running. Most of this data is private and should only be accessed - * indirectly via public functions; the one exception is @priv which can be - * used by the test writer to store arbitrary data. + * indirectly via public functions; the two exceptions are @priv and @parent + * which can be used by the test writer to store arbitrary data or data that is + * available to all parameter test executions, respectively. */ struct kunit { void *priv; + /* + * Reference to the parent struct kunit for storing shared resources + * during parameterized testing. + */ + struct kunit *parent;

/* private: internal use only. */ const char *name; /* Read only after initialization! */ diff --git a/lib/kunit/test.c b/lib/kunit/test.c index f3c6b11f12b8..4d6a39eb2c80 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -647,6 +647,7 @@ int kunit_run_tests(struct kunit_suite *suite) struct kunit_case *test_case; struct kunit_result_stats suite_stats = { 0 }; struct kunit_result_stats total_stats = { 0 }; + const void *curr_param;

/* Taint the kernel so we know we've run tests. */ add_taint(TAINT_TEST, LOCKDEP_STILL_OK); @@ -679,36 +680,39 @@ int kunit_run_tests(struct kunit_suite *suite) } else { /* Get initial param. */ param_desc[0] = '\0'; - test.param_value = test_case->generate_params(NULL, param_desc); + /* TODO: Make generate_params try-catch */ + curr_param = test_case->generate_params(NULL, param_desc); test_case->status = KUNIT_SKIPPED; kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT "KTAP version 1\n"); kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT "# Subtest: %s", test_case->name);

- while (test.param_value) { - kunit_run_case_catch_errors(suite, test_case, &test); + while (curr_param) { + struct kunit param_test = { + .param_value = curr_param, + .param_index = ++test.param_index, + .parent = &test, + }; + kunit_init_test(&param_test, test_case->name, test_case->log); + kunit_run_case_catch_errors(suite, test_case, &param_test);

if (param_desc[0] == '\0') { snprintf(param_desc, sizeof(param_desc), "param-%d", test.param_index); }

- kunit_print_ok_not_ok(&test, KUNIT_LEVEL_CASE_PARAM, - test.status, - test.param_index + 1, + kunit_print_ok_not_ok(&param_test, KUNIT_LEVEL_CASE_PARAM, + param_test.status, + param_test.param_index, param_desc, - test.status_comment); + param_test.status_comment);

- kunit_update_stats(&param_stats, test.status); + kunit_update_stats(&param_stats, param_test.status);

/* Get next param. */ param_desc[0] = '\0'; - test.param_value = test_case->generate_params(test.param_value, param_desc); - test.param_index++; - test.status = KUNIT_SUCCESS; - test.status_comment[0] = '\0'; - test.priv = NULL; + curr_param = test_case->generate_params(curr_param, param_desc); } }

@@ -723,6 +727,8 @@ int kunit_run_tests(struct kunit_suite *suite)

kunit_update_stats(&suite_stats, test_case->status); kunit_accumulate_stats(&total_stats, param_stats); + /* TODO: Put this kunit_cleanup into a try-catch. */ + kunit_cleanup(&test); }

if (suite->suite_exit)