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Add the SECURITY_LANDLOCK_KUNIT_TEST option to enable KUnit tests for
Landlock. The minimal required configuration is listed in the
security/landlock/.kunitconfig file.
Add an initial landlock_fs KUnit test suite with 7 test cases for
filesystem helpers. These are related to the LANDLOCK_ACCESS_FS_REFER
right.
There is one KUnit test case per:
* mutated state (e.g. test_scope_to_request_*) or,
* shared state between tests (e.g. test_is_eaccess_*).
Add macros to improve readability of tests (i.e. one per line). Test
cases are collocated with the tested functions to help maintenance and
improve documentation. This is why SECURITY_LANDLOCK_KUNIT_TEST cannot
be set as module.
This is a nice complement to Landlock's user space kselftests. We
expect new Landlock features to come with KUnit tests as well.
Thanks to UML support, we can run all KUnit tests for Landlock with:
./tools/testing/kunit/kunit.py run --kunitconfig security/landlock
[00:00:00] ======================= landlock_fs =======================
[00:00:00] [PASSED] test_no_more_access
[00:00:00] [PASSED] test_scope_to_request_with_exec_none
[00:00:00] [PASSED] test_scope_to_request_with_exec_some
[00:00:00] [PASSED] test_scope_to_request_without_access
[00:00:00] [PASSED] test_is_eacces_with_none
[00:00:00] [PASSED] test_is_eacces_with_refer
[00:00:00] [PASSED] test_is_eacces_with_write
[00:00:00] =================== [PASSED] landlock_fs ===================
[00:00:00] ============================================================
[00:00:00] Testing complete. Ran 7 tests: passed: 7
Cc: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Reviewed-by: Günther Noack <gnoack@google.com>
Link: https://lore.kernel.org/r/20240118113632.1948478-1-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>
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