On Mon, 7 Aug 2023 at 18:28, Janusz Krzysztofik
<janusz.krzysztofik@xxxxxxxxxxxxxxx> wrote:
>
> Results from kunit tests reported via dmesg may be interleaved with other
> kernel messages. When parsing dmesg for modular kunit results in real
> time, external tools, e.g., Intel GPU tools (IGT), may want to insert
> their own test name markers into dmesg at the start of each test, before
> any kernel message related to that test appears there, so existing upper
> level test result parsers have no doubt which test to blame for a specific
> kernel message. Unfortunately, kunit reports names of tests only at their
> completion (with the exeption of a not standarized "# Subtest: <name>"
> header above a test plan of each test suite or parametrized test).
>
> External tools could be able to insert their own "start of the test"
> markers with test names included if they new those names in advance.
> Test names could be learned from a list if provided by a kunit test
> module.
>
> There exists a feature of listing kunit tests without actually executing
> them, but it is now limited to configurations with the kunit module built
> in and covers only built-in tests, already available at boot time.
> Moreover, switching from list to normal mode requires reboot. If that
> feature was also available when kunit is built as a module, userspace
> could load the module with action=list parameter, load some kunit test
> modules they are interested in and learn about the list of tests provided
> by those modules, then unload them, reload the kunit module in normal mode
> and execute the tests with their lists already known.
>
> Extend kunit module notifier initialization callback with a processing
> path for only listing the tests provided by a module if the kunit action
> parameter is set to "list" or "list_attr". For user convenience, make the
> kunit.action parameter visible in sysfs.
>
> v2: Don't use a different format, use kunit_exec_list_tests() (Rae),
> - refresh on top of new attributes patches, handle newly introduced
> kunit.action=list_attr case (Rae).
>
> Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@xxxxxxxxxxxxxxx>
> Cc: Rae Moar <rmoar@xxxxxxxxxx>
> ---
Looks good, thanks!
Reviewed-by: David Gow <davidgow@xxxxxxxxxx>
> include/kunit/test.h | 2 ++
> lib/kunit/executor.c | 28 +++++++++++++++++-----------
> lib/kunit/test.c | 18 +++++++++++++++---
> 3 files changed, 34 insertions(+), 14 deletions(-)
>
> diff --git a/include/kunit/test.h b/include/kunit/test.h
> index 3d002e6b252f2..6a338a3267ed5 100644
> --- a/include/kunit/test.h
> +++ b/include/kunit/test.h
> @@ -309,6 +309,7 @@ static inline void kunit_set_failure(struct kunit *test)
> }
>
> bool kunit_enabled(void);
> +const char *kunit_action(void);
>
> void kunit_init_test(struct kunit *test, const char *name, char *log);
>
> @@ -324,6 +325,7 @@ int __kunit_test_suites_init(struct kunit_suite * const * const suites, int num_
> void __kunit_test_suites_exit(struct kunit_suite **suites, int num_suites);
>
> void kunit_exec_run_tests(struct kunit_suite_set *suite_set, bool builtin);
> +void kunit_exec_list_tests(struct kunit_suite_set *suite_set, bool include_attr);
>
> #if IS_BUILTIN(CONFIG_KUNIT)
> int kunit_run_all_tests(void);
> diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c
> index 5ef90c334eb0f..e877c1f1e75c8 100644
> --- a/lib/kunit/executor.c
> +++ b/lib/kunit/executor.c
> @@ -13,22 +13,29 @@
> extern struct kunit_suite * const __kunit_suites_start[];
> extern struct kunit_suite * const __kunit_suites_end[];
>
> +static char *action_param;
> +
> +module_param_named(action, action_param, charp, 0400);
> +MODULE_PARM_DESC(action,
> + "Changes KUnit executor behavior, valid values are:\n"
> + "<none>: run the tests like normal\n"
> + "'list' to list test names instead of running them.\n"
> + "'list_attr' to list test names and attributes instead of running them.\n");
> +
> +const char *kunit_action(void)
I'm not _totally_ sold on the name kunit_action() for a function here,
but none of the other options I can think of (kunit_get_action(),
kunit_action_param(), kunit_action_value(), etc) sound better, so
let's go with it.
> +{
> + return action_param;
> +}
> +
> #if IS_BUILTIN(CONFIG_KUNIT)
>
> static char *filter_glob_param;
> -static char *action_param;
> static char *filter_param;
> static char *filter_action_param;
>
> module_param_named(filter_glob, filter_glob_param, charp, 0);
> MODULE_PARM_DESC(filter_glob,
> "Filter which KUnit test suites/tests run at boot-time, e.g. list* or list*.*del_test");
> -module_param_named(action, action_param, charp, 0);
> -MODULE_PARM_DESC(action,
> - "Changes KUnit executor behavior, valid values are:\n"
> - "<none>: run the tests like normal\n"
> - "'list' to list test names instead of running them.\n"
> - "'list_attr' to list test names and attributes instead of running them.\n");
> module_param_named(filter, filter_param, charp, 0);
> MODULE_PARM_DESC(filter,
> "Filter which KUnit test suites/tests run at boot-time using attributes, e.g. speed>slow");
> @@ -239,10 +246,7 @@ void kunit_exec_run_tests(struct kunit_suite_set *suite_set, bool builtin)
> __kunit_test_suites_init(suite_set->start, num_suites);
> }
>
> -#if IS_BUILTIN(CONFIG_KUNIT)
> -
> -static void kunit_exec_list_tests(struct kunit_suite_set *suite_set,
> - bool include_attr)
> +void kunit_exec_list_tests(struct kunit_suite_set *suite_set, bool include_attr)
> {
> struct kunit_suite * const *suites;
> struct kunit_case *test_case;
> @@ -265,6 +269,8 @@ static void kunit_exec_list_tests(struct kunit_suite_set *suite_set,
> }
> }
>
> +#if IS_BUILTIN(CONFIG_KUNIT)
> +
> int kunit_run_all_tests(void)
> {
> struct kunit_suite_set suite_set = {
> diff --git a/lib/kunit/test.c b/lib/kunit/test.c
> index 8b2808068497f..5232a43737826 100644
> --- a/lib/kunit/test.c
> +++ b/lib/kunit/test.c
> @@ -739,13 +739,25 @@ static void kunit_module_init(struct module *mod)
> struct kunit_suite_set suite_set = {
> mod->kunit_suites, mod->kunit_suites + mod->num_kunit_suites,
> };
> -
> - kunit_exec_run_tests(&suite_set, false);
> + const char *action = kunit_action();
> +
> + if (!action)
> + kunit_exec_run_tests(&suite_set, false);
> + else if (!strcmp(action, "list"))
> + kunit_exec_list_tests(&suite_set, false);
> + else if (!strcmp(action, "list_attr"))
> + kunit_exec_list_tests(&suite_set, true);
> + else
> + pr_err("kunit: unknown action '%s'\n", action);
> }
>
> static void kunit_module_exit(struct module *mod)
> {
> - __kunit_test_suites_exit(mod->kunit_suites, mod->num_kunit_suites);
> + const char *action = kunit_action();
> +
> + if (!action)
> + __kunit_test_suites_exit(mod->kunit_suites,
> + mod->num_kunit_suites);
> }
>
> static int kunit_module_notify(struct notifier_block *nb, unsigned long val,
> --
> 2.41.0
>
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