linux/lib/kunit, branch v5.14

Merge tag 'linux-kselftest-kunit-fixes-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2021-07-02T19:58:26Z

Pull KUnit update from Shuah Khan: "Fixes and features: - add support for skipped tests - introduce kunit_kmalloc_array/kunit_kcalloc() helpers - add gnu_printf specifiers - add kunit_shutdown - add unit test for filtering suites by names - convert lib/test_list_sort.c to use KUnit - code organization moving default config to tools/testing/kunit - refactor of internal parser input handling - cleanups and updates to documentation - code cleanup related to casts" * tag 'linux-kselftest-kunit-fixes-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits) kunit: add unit test for filtering suites by names kasan: test: make use of kunit_skip() kunit: test: Add example tests which are always skipped kunit: tool: Support skipped tests in kunit_tool kunit: Support skipped tests thunderbolt: test: Reinstate a few casts of bitfields kunit: tool: internal refactor of parser input handling lib/test: convert lib/test_list_sort.c to use KUnit kunit: introduce kunit_kmalloc_array/kunit_kcalloc() helpers kunit: Remove the unused all_tests.config kunit: Move default config from arch/um -> tools/testing/kunit kunit: arch/um/configs: Enable KUNIT_ALL_TESTS by default kunit: Add gnu_printf specifiers lib/cmdline_kunit: Remove a cast which are no-longer required kernel/sysctl-test: Remove some casts which are no-longer required thunderbolt: test: Remove some casts which are no longer required mmc: sdhci-of-aspeed: Remove some unnecessary casts from KUnit tests iio: Remove a cast in iio-test-format which is no longer required device property: Remove some casts in property-entry-test Documentation: kunit: Clean up some string casts in examples ...

kunit: make test->lock irq safe

2021-06-29T17:53:46Z

The upcoming SLUB kunit test will be calling kunit_find_named_resource() from a context with disabled interrupts. That means kunit's test->lock needs to be IRQ safe to avoid potential deadlocks and lockdep splats. This patch therefore changes the test->lock usage to spin_lock_irqsave() and spin_unlock_irqrestore(). Link: https://lkml.kernel.org/r/20210511150734.3492-1-glittao@gmail.com Signed-off-by: Vlastimil Babka Signed-off-by: Oliver Glitta Reviewed-by: Brendan Higgins Cc: Christoph Lameter Cc: Daniel Latypov Cc: David Rientjes Cc: Joonsoo Kim Cc: Marco Elver Cc: Pekka Enberg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kunit: add unit test for filtering suites by names

2021-06-25T17:44:37Z

This adds unit tests for kunit_filter_subsuite() and kunit_filter_suites(). Note: what the executor means by "subsuite" is the array of suites corresponding to each test file. This patch lightly refactors executor.c to avoid the use of global variables to make it testable. It also includes a clever `kfree_at_end()` helper that makes this test easier to write than it otherwise would have been. Tested by running just the new tests using itself $ ./tools/testing/kunit/kunit.py run '*exec*' Signed-off-by: Daniel Latypov Reviewed-by: David Gow Acked-by: Brendan Higgins Tested-by: Brendan Higgins Signed-off-by: Shuah Khan

kunit: test: Add example tests which are always skipped

2021-06-25T17:31:03Z

Add two new tests to the example test suite, both of which are always skipped. This is used as an example for how to write tests which are skipped, and to demonstrate the difference between kunit_skip() and kunit_mark_skipped(). Note that these tests are enabled by default, so a default run of KUnit will have two skipped tests. Signed-off-by: David Gow Reviewed-by: Daniel Latypov Reviewed-by: Brendan Higgins Reviewed-by: Marco Elver Signed-off-by: Shuah Khan

kunit: Support skipped tests

2021-06-25T17:31:03Z

The kunit_mark_skipped() macro marks the current test as "skipped", with the provided reason. The kunit_skip() macro will mark the test as skipped, and abort the test. The TAP specification supports this "SKIP directive" as a comment after the "ok" / "not ok" for a test. See the "Directives" section of the TAP spec for details: https://testanything.org/tap-specification.html#directives The 'success' field for KUnit tests is replaced with a kunit_status enum, which can be SUCCESS, FAILURE, or SKIPPED, combined with a 'status_comment' containing information on why a test was skipped. A new 'kunit_status' test suite is added to test this. Signed-off-by: David Gow Tested-by: Marco Elver Reviewed-by: Daniel Latypov Reviewed-by: Brendan Higgins Signed-off-by: Shuah Khan

kunit: introduce kunit_kmalloc_array/kunit_kcalloc() helpers

2021-06-25T17:31:03Z

Add in: * kunit_kmalloc_array() and wire up kunit_kmalloc() to be a special case of it. * kunit_kcalloc() for symmetry with kunit_kzalloc() This should using KUnit more natural by making it more similar to the existing *alloc() APIs. And while we shouldn't necessarily be writing unit tests where overflow should be a concern, it can't hurt to be safe. Signed-off-by: Daniel Latypov Reviewed-by: David Gow Reviewed-by: Brendan Higgins Signed-off-by: Shuah Khan

kunit: Add gnu_printf specifiers

2021-06-23T23:06:04Z

Some KUnit functions use variable arguments to implement a printf-like format string. Use the __printf() attribute to let the compiler warn if invalid format strings are passed in. If the kernel is build with W=1, it complained about the lack of these specifiers, e.g.: ../lib/kunit/test.c:72:2: warning: function ‘kunit_log_append’ might be a candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format] Signed-off-by: David Gow Reviewed-by: Daniel Latypov Acked-by: Brendan Higgins Signed-off-by: Shuah Khan

kunit: Add 'kunit_shutdown' option

2021-06-11T22:04:57Z

Add a new kernel command-line option, 'kunit_shutdown', which allows the user to specify that the kernel poweroff, halt, or reboot after completing all KUnit tests; this is very handy for running KUnit tests on UML or a VM so that the UML/VM process exits cleanly immediately after running all tests without needing a special initramfs. Signed-off-by: David Gow Signed-off-by: Brendan Higgins Reviewed-by: Stephen Boyd Tested-By: Daniel Latypov Reviewed-by: Daniel Latypov Signed-off-by: Shuah Khan

kunit: Fix result propagation for parameterised tests

2021-06-11T21:50:38Z

When one parameter of a parameterised test failed, its failure would be propagated to the overall test, but not to the suite result (unless it was the last parameter). This is because test_case->success was being reset to the test->success result after each parameter was used, so a failing test's result would be overwritten by a non-failing result. The overall test result was handled in a third variable, test_result, but this was discarded after the status line was printed. Instead, just propagate the result after each parameter run. Signed-off-by: David Gow Fixes: fadb08e7c750 ("kunit: Support for Parameterized Testing") Reviewed-by: Marco Elver Reviewed-by: Brendan Higgins Signed-off-by: Shuah Khan

kunit: support failure from dynamic analysis tools

2021-04-02T20:19:58Z

Add a kunit_fail_current_test() function to fail the currently running test, if any, with an error message. This is largely intended for dynamic analysis tools like UBSAN and for fakes. E.g. say I had a fake ops struct for testing and I wanted my `free` function to complain if it was called with an invalid argument, or caught a double-free. Most return void and have no normal means of signalling failure (e.g. super_operations, iommu_ops, etc.). Key points: * Always update current->kunit_test so anyone can use it. * commit 83c4e7a0363b ("KUnit: KASAN Integration") only updated it for CONFIG_KASAN=y * Create a new header so non-test code doesn't have to include all of (e.g. lib/ubsan.c) * Forward the file and line number to make it easier to track down failures * Declare the helper function for nice __printf() warnings about mismatched format strings even when KUnit is not enabled. Example output from kunit_fail_current_test("message"): [15:19:34] [FAILED] example_simple_test [15:19:34] # example_simple_test: initializing [15:19:34] # example_simple_test: lib/kunit/kunit-example-test.c:24: message [15:19:34] not ok 1 - example_simple_test Fixed minor check patch with checkpatch --fix option: Shuah Khan Signed-off-by: Daniel Latypov Signed-off-by: Uriel Guajardo Reviewed-by: Alan Maguire Reviewed-by: Brendan Higgins Signed-off-by: Shuah Khan