selftests: revocable: Add kselftest cases
Add kselftest cases for the revocable API.
The test consists of three parts:
- A kernel module (revocable_test.ko) that creates a debugfs interface
with `/provider` and `/consumer` files.
- A user-space C program (revocable_test) that uses the kselftest
harness to interact with the debugfs files.
- An orchestrating shell script (test-revocable.sh) that loads the
module, runs the C program, and unloads the module.
The test cases cover the following scenarios:
- Basic: Verifies that a consumer can successfully access the resource
provided via the provider.
- Revocation: Verifies that after the provider revokes the resource,
the consumer correctly receives a NULL pointer on a subsequent access.
- Macro: Same as "Revocation" but uses the REVOCABLE_TRY_ACCESS_WITH()
and REVOCABLE_TRY_ACCESS_SCOPED().
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
7 files changed
