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Message-ID: <CABVgOS=eLuR-vYEsWCMMjcmVeqY6dfTF37o_+HHj+LGKnT+gJA@mail.gmail.com>
Date: Wed, 28 Jul 2021 14:31:07 +0800
From: David Gow <davidgow@...gle.com>
To: José Aquiles Guedes de Rezende
<jjoseaquiless@...il.com>
Cc: Jiri Pirko <jiri@...dia.com>, Networking <netdev@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Brendan Higgins <brendanhiggins@...gle.com>,
Daniel Latypov <dlatypov@...gle.com>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@...r.kernel.org>, ~lkcamp/patches@...ts.sr.ht,
Matheus Henrique de Souza Silva
<matheushenriquedesouzasilva@...tonmail.com>
Subject: Re: [PATCH v2] lib: use of kunit in test_parman.c
On Wed, Jul 28, 2021 at 12:55 PM José Aquiles Guedes de Rezende
<jjoseaquiless@...il.com> wrote:
>
> Convert the parman test module to use the KUnit test framework.
> This makes the test clearer by leveraging KUnit's assertion macros
> and test case definitions,as well as helps standardize on a testing framework.
>
> Co-developed-by: Matheus Henrique de Souza Silva <matheushenriquedesouzasilva@...tonmail.com>
> Signed-off-by: Matheus Henrique de Souza Silva <matheushenriquedesouzasilva@...tonmail.com>
> Signed-off-by: José Aquiles Guedes de Rezende <jjoseaquiless@...il.com>
> ---
>
> Changes in v2:
> - Rename TEST_PARMAN config item to PARMAN_KUNIT_TEST
> and make it work with the kunit framework.
> - Change KUNIT_ASSERT_EQ to KUNIT_ASSERT_EQ_MSG.
> - Call test_parman_resize(test_parman, 0) when parman_create fail
> - Remove kunit_kfree.
> - Remove "\n" in error messages
> - Remove casts to unsigned long
>
Awesome! This worked out-of-the-box for me, thanks!
I'll leave a more detailed review to someone who knows what parman is
better than I, but it looks good to me from a KUnit point of view.
Nevertheless, this is
Tested-by: David Gow <davidgow@...gle.com>
-- David
> lib/Kconfig.debug | 13 +++--
> lib/Makefile | 2 +-
> lib/test_parman.c | 145 +++++++++++++++++++---------------------------
> 3 files changed, 70 insertions(+), 90 deletions(-)
>
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 831212722924..e68a27e5e5b0 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -2231,12 +2231,15 @@ config TEST_HASH
> config TEST_IDA
> tristate "Perform selftest on IDA functions"
>
> -config TEST_PARMAN
> - tristate "Perform selftest on priority array manager"
> - depends on PARMAN
> +config PARMAN_KUNIT_TEST
> + tristate "Kunit test for priority array manager" if !KUNIT_ALL_TESTS
> + select PARMAN
> + depends on KUNIT
> + default KUNIT_ALL_TESTS
> help
> - Enable this option to test priority array manager on boot
> - (or module load).
> + Enable this option to test priority array manager on boot.
> + For more information on KUnit and unit tests in general please refer
> + to the KUnit documentation in Documentation/dev-tools/kunit/.
>
> If unsure, say N.
>
> diff --git a/lib/Makefile b/lib/Makefile
> index 5efd1b435a37..deb8946735e8 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -88,7 +88,7 @@ obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o
> obj-$(CONFIG_TEST_STRSCPY) += test_strscpy.o
> obj-$(CONFIG_TEST_UUID) += test_uuid.o
> obj-$(CONFIG_TEST_XARRAY) += test_xarray.o
> -obj-$(CONFIG_TEST_PARMAN) += test_parman.o
> +obj-$(CONFIG_PARMAN_KUNIT_TEST) += test_parman.o
> obj-$(CONFIG_TEST_KMOD) += test_kmod.o
> obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o
> obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o
> diff --git a/lib/test_parman.c b/lib/test_parman.c
> index 35e32243693c..512f874bc71c 100644
> --- a/lib/test_parman.c
> +++ b/lib/test_parman.c
> @@ -41,6 +41,8 @@
> #include <linux/err.h>
> #include <linux/random.h>
> #include <linux/parman.h>
> +#include <linux/sched.h>
> +#include <kunit/test.h>
>
> #define TEST_PARMAN_PRIO_SHIFT 7 /* defines number of prios for testing */
> #define TEST_PARMAN_PRIO_COUNT BIT(TEST_PARMAN_PRIO_SHIFT)
> @@ -91,12 +93,14 @@ struct test_parman {
>
> static int test_parman_resize(void *priv, unsigned long new_count)
> {
> + struct kunit *test = current->kunit_test;
> struct test_parman *test_parman = priv;
> struct test_parman_item **prio_array;
> unsigned long old_count;
>
> prio_array = krealloc(test_parman->prio_array,
> ITEM_PTRS_SIZE(new_count), GFP_KERNEL);
> + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, prio_array);
> if (new_count == 0)
> return 0;
> if (!prio_array)
> @@ -214,42 +218,41 @@ static void test_parman_items_fini(struct test_parman *test_parman)
> }
> }
>
> -static struct test_parman *test_parman_create(const struct parman_ops *ops)
> +static int test_parman_create(struct kunit *test)
> {
> struct test_parman *test_parman;
> int err;
>
> - test_parman = kzalloc(sizeof(*test_parman), GFP_KERNEL);
> - if (!test_parman)
> - return ERR_PTR(-ENOMEM);
> + test_parman = kunit_kzalloc(test, sizeof(*test_parman), GFP_KERNEL);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, test_parman);
> +
> err = test_parman_resize(test_parman, TEST_PARMAN_BASE_COUNT);
> - if (err)
> - goto err_resize;
> - test_parman->parman = parman_create(ops, test_parman);
> - if (!test_parman->parman) {
> - err = -ENOMEM;
> - goto err_parman_create;
> + KUNIT_ASSERT_EQ_MSG(test, err, 0, "test_parman_resize failed");
> +
> + test_parman->parman = parman_create(&test_parman_lsort_ops, test_parman);
> + if (IS_ERR_OR_NULL(test_parman->parman)) {
> + test_parman_resize(test_parman, 0);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, test_parman->parman);
> }
> +
> test_parman_rnd_init(test_parman);
> test_parman_prios_init(test_parman);
> test_parman_items_init(test_parman);
> test_parman->run_budget = TEST_PARMAN_RUN_BUDGET;
> - return test_parman;
> -
> -err_parman_create:
> - test_parman_resize(test_parman, 0);
> -err_resize:
> - kfree(test_parman);
> - return ERR_PTR(err);
> + test->priv = test_parman;
> + return 0;
> }
>
> -static void test_parman_destroy(struct test_parman *test_parman)
> +static void test_parman_destroy(struct kunit *test)
> {
> + struct test_parman *test_parman = test->priv;
> +
> + if (!test_parman)
> + return;
> test_parman_items_fini(test_parman);
> test_parman_prios_fini(test_parman);
> parman_destroy(test_parman->parman);
> test_parman_resize(test_parman, 0);
> - kfree(test_parman);
> }
>
> static bool test_parman_run_check_budgets(struct test_parman *test_parman)
> @@ -265,8 +268,9 @@ static bool test_parman_run_check_budgets(struct test_parman *test_parman)
> return true;
> }
>
> -static int test_parman_run(struct test_parman *test_parman)
> +static void test_parman_run(struct kunit *test)
> {
> + struct test_parman *test_parman = test->priv;
> unsigned int i = test_parman_rnd_get(test_parman);
> int err;
>
> @@ -281,8 +285,8 @@ static int test_parman_run(struct test_parman *test_parman)
> err = parman_item_add(test_parman->parman,
> &item->prio->parman_prio,
> &item->parman_item);
> - if (err)
> - return err;
> + KUNIT_ASSERT_EQ_MSG(test, err, 0, "parman_item_add failed");
> +
> test_parman->prio_array[item->parman_item.index] = item;
> test_parman->used_items++;
> } else {
> @@ -294,22 +298,19 @@ static int test_parman_run(struct test_parman *test_parman)
> }
> item->used = !item->used;
> }
> - return 0;
> }
>
> -static int test_parman_check_array(struct test_parman *test_parman,
> - bool gaps_allowed)
> +static void test_parman_check_array(struct kunit *test, bool gaps_allowed)
> {
> unsigned int last_unused_items = 0;
> unsigned long last_priority = 0;
> unsigned int used_items = 0;
> int i;
> + struct test_parman *test_parman = test->priv;
>
> - if (test_parman->prio_array_limit < TEST_PARMAN_BASE_COUNT) {
> - pr_err("Array limit is lower than the base count (%lu < %lu)\n",
> - test_parman->prio_array_limit, TEST_PARMAN_BASE_COUNT);
> - return -EINVAL;
> - }
> + KUNIT_ASSERT_GE_MSG(test, test_parman->prio_array_limit, TEST_PARMAN_BASE_COUNT,
> + "Array limit is lower than the base count (%lu < %lu)",
> + test_parman->prio_array_limit, TEST_PARMAN_BASE_COUNT);
>
> for (i = 0; i < test_parman->prio_array_limit; i++) {
> struct test_parman_item *item = test_parman->prio_array[i];
> @@ -318,77 +319,53 @@ static int test_parman_check_array(struct test_parman *test_parman,
> last_unused_items++;
> continue;
> }
> - if (last_unused_items && !gaps_allowed) {
> - pr_err("Gap found in array even though they are forbidden\n");
> - return -EINVAL;
> - }
> +
> + KUNIT_ASSERT_FALSE_MSG(test, last_unused_items && !gaps_allowed,
> + "Gap found in array even though they are forbidden");
>
> last_unused_items = 0;
> used_items++;
>
> - if (item->prio->priority < last_priority) {
> - pr_err("Item belongs under higher priority then the last one (current: %lu, previous: %lu)\n",
> - item->prio->priority, last_priority);
> - return -EINVAL;
> - }
> - last_priority = item->prio->priority;
> + KUNIT_ASSERT_GE_MSG(test, item->prio->priority, last_priority,
> + "Item belongs under higher priority then the last one (current: %lu, previous: %lu)",
> + item->prio->priority, last_priority);
>
> - if (item->parman_item.index != i) {
> - pr_err("Item has different index in compare to where it actually is (%lu != %d)\n",
> - item->parman_item.index, i);
> - return -EINVAL;
> - }
> - }
> + last_priority = item->prio->priority;
>
> - if (used_items != test_parman->used_items) {
> - pr_err("Number of used items in array does not match (%u != %u)\n",
> - used_items, test_parman->used_items);
> - return -EINVAL;
> - }
> + KUNIT_ASSERT_EQ_MSG(test, item->parman_item.index, i,
> + "Item has different index in compare to where it actually is (%lu != %d)",
> + item->parman_item.index, i);
>
> - if (last_unused_items >= TEST_PARMAN_RESIZE_STEP_COUNT) {
> - pr_err("Number of unused item at the end of array is bigger than resize step (%u >= %lu)\n",
> - last_unused_items, TEST_PARMAN_RESIZE_STEP_COUNT);
> - return -EINVAL;
> }
>
> - pr_info("Priority array check successful\n");
> + KUNIT_ASSERT_EQ_MSG(test, used_items, test_parman->used_items,
> + "Number of used items in array does not match (%u != %u)",
> + used_items, test_parman->used_items);
>
> - return 0;
> + KUNIT_ASSERT_LT_MSG(test, last_unused_items, TEST_PARMAN_RESIZE_STEP_COUNT,
> + "Number of unused item at the end of array is bigger than resize step (%u >= %lu)",
> + last_unused_items, TEST_PARMAN_RESIZE_STEP_COUNT);
> }
>
> -static int test_parman_lsort(void)
> +static void test_parman_lsort(struct kunit *test)
> {
> - struct test_parman *test_parman;
> - int err;
> -
> - test_parman = test_parman_create(&test_parman_lsort_ops);
> - if (IS_ERR(test_parman))
> - return PTR_ERR(test_parman);
> -
> - err = test_parman_run(test_parman);
> - if (err)
> - goto out;
> -
> - err = test_parman_check_array(test_parman, false);
> - if (err)
> - goto out;
> -out:
> - test_parman_destroy(test_parman);
> - return err;
> + test_parman_run(test);
> + test_parman_check_array(test, false);
> }
>
> -static int __init test_parman_init(void)
> -{
> - return test_parman_lsort();
> -}
> +static struct kunit_case parman_test_case[] = {
> + KUNIT_CASE(test_parman_lsort),
> + {}
> +};
>
> -static void __exit test_parman_exit(void)
> -{
> -}
> +static struct kunit_suite parman_test_suite = {
> + .name = "parman",
> + .init = test_parman_create,
> + .exit = test_parman_destroy,
> + .test_cases = parman_test_case,
> +};
>
> -module_init(test_parman_init);
> -module_exit(test_parman_exit);
> +kunit_test_suite(parman_test_suite);
>
> MODULE_LICENSE("Dual BSD/GPL");
> MODULE_AUTHOR("Jiri Pirko <jiri@...lanox.com>");
> --
> 2.32.0
>
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