kernel/linux.git/tools/testing/selftests/user_events, branch v6.6.131

selftests/user_events: fix type cast for write_index packed member in perf_test

2025-11-24T09:30:08+00:00

commit 216158f063fe24fb003bd7da0cd92cd6e2c4d48b upstream. Accessing 'reg.write_index' directly triggers a -Waddress-of-packed-member warning due to potential unaligned pointer access: perf_test.c:239:38: warning: taking address of packed member 'write_index' of class or structure 'user_reg' may result in an unaligned pointer value [-Waddress-of-packed-member] 239 | ASSERT_NE(-1, write(self->data_fd, ®.write_index, | ^~~~~~~~~~~~~~~ Since write(2) works with any alignment. Casting '®.write_index' explicitly to 'void *' to suppress this warning. Link: https://lkml.kernel.org/r/20251106095532.15185-1-ankitkhushwaha.linux@gmail.com Fixes: 42187bdc3ca4 ("selftests/user_events: Add perf self-test for empty arguments events") Signed-off-by: Ankit Khushwaha Cc: Beau Belgrave Cc: "Masami Hiramatsu (Google)" Cc: Steven Rostedt Cc: sunliming Cc: Wei Yang Cc: Shuah Khan Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

selftests/user_events: Fix abi_test for BE archs

2023-10-17T21:07:19+00:00

The abi_test currently uses a long sized test value for enablement checks. On LE this works fine, however, on BE this results in inaccurate assert checks due to a bit being used and assuming it's value is the same on both LE and BE. Use int type for 32-bit values and long type for 64-bit values to ensure appropriate behavior on both LE and BE. Fixes: 60b1af8de8c1 ("tracing/user_events: Add ABI self-test") Signed-off-by: Beau Belgrave Acked-by: Steven Rostedt (Google) Signed-off-by: Shuah Khan

selftests/user_events: Fix to unmount tracefs when test created mount

2023-09-18T17:04:52+00:00

Fix to unmount tracefs if the self-test mounted it to allow testing. If tracefs was already mounted, this does nothing. Suggested-by: Mark Brown Link: https://lore.kernel.org/all/29fce076-746c-4650-8358-b4e0fa215cf7@sirena.org.uk/ Fixes: a06023a8f78d ("selftests/user_events: Fix failures when user_events is not installed") Signed-off-by: Beau Belgrave Reviewed-by: Mark Brown Signed-off-by: Shuah Khan

selftests: user_events: create test-specific Kconfig fragments

2023-09-11T23:06:48+00:00

Create the config file in user_events directory of testcase which need more kernel configuration than the default defconfig. User could use these configs with merge_config.sh script: The Kconfig CONFIG_USER_EVENTS=y is needed for the test to read data from the following files, - "/sys/kernel/tracing/user_events_data" - "/sys/kernel/tracing/user_events_status" - "/sys/kernel/tracing/events/user_events/*" Enable config for specific testcase: (export ARCH=xxx #for cross compiling) ./scripts/kconfig/merge_config.sh .config \ tools/testing/selftests/user_events/config Enable configs for all testcases: (export ARCH=xxx #for cross compiling) ./scripts/kconfig/merge_config.sh .config \ tools/testing/selftests/*/config Cc: Beau Belgrave Cc: Shuah Khan Cc: linux-kselftest@vger.kernel.org Signed-off-by: Naresh Kamboju Signed-off-by: Shuah Khan

selftests/user_events: Fix failures when user_events is not installed

2023-09-11T23:04:11+00:00

When user_events is not installed the self tests currently fail. Now that these self tests run by default we need to ensure they don't fail when user_events was not enabled for the kernel being tested. Add common methods to detect if tracefs and user_events is enabled. If either is not enabled skip the test. If tracefs is enabled, but is not mounted, mount tracefs and fail if there were any errors. Fail if not run as root. Fixes: 68b4d2d58389 ("selftests/user_events: Reenable build") Reported-by: Naresh Kamboju Link: https://lore.kernel.org/all/CA+G9fYuugZ0OMeS6HvpSS4nuf_A3s455ecipGBvER0LJHojKZg@mail.gmail.com/ Signed-off-by: Beau Belgrave Signed-off-by: Shuah Khan

selftests/user_events: Reenable build

2023-08-16T16:29:57+00:00

The user_events selftests were removed from the standard set of selftests due to the uapi header it relies on having been temporarily removed. That header is now reinstated so we can reenable the tests. Signed-off-by: Mark Brown Signed-off-by: Shuah Khan

selftests/user_events: Test struct size match cases

2023-07-12T16:04:47+00:00

The self tests for user_events currently does not ensure that the edge case for struct types work properly with size differences. Add cases for mis-matching struct names and sizes to ensure they work properly. Link: https://lkml.kernel.org/r/20230629235049.581-3-beaub@linux.microsoft.com Cc: Shuah Khan Cc: linux-kselftest@vger.kernel.org Signed-off-by: Beau Belgrave Signed-off-by: Steven Rostedt (Google)

selftests/user_events: Add test cases when event is disabled

2023-06-28T15:01:35+00:00

When user_events are disabled, it's write operation should return -EBADF. Add this test cases. Link: https://lkml.kernel.org/r/20230626111344.19136-4-sunliming@kylinos.cn Acked-by: Beau Belgrave Signed-off-by: sunliming Signed-off-by: Steven Rostedt (Google)

selftests/user_events: Enable the event before write_fault test in ftrace self-test

2023-06-28T15:01:35+00:00

The user_event has not be enabled in write_fault test in ftrace self-test, Just enable it. Link: https://lkml.kernel.org/r/20230626111344.19136-3-sunliming@kylinos.cn Acked-by: Beau Belgrave Signed-off-by: sunliming Signed-off-by: Steven Rostedt (Google)

selftests/user_events: Adapt dyn_test to non-persist events

2023-06-14T17:43:27+00:00

Now that user_events does not honor persist events the dynamic_events file cannot be easily used to test parsing and matching cases. Update dyn_test to use the direct ABI file instead of dynamic_events so that we still have testing coverage until persist events and dynamic_events file integration has been decided. Link: https://lkml.kernel.org/r/20230614163336.5797-6-beaub@linux.microsoft.com Signed-off-by: Beau Belgrave Signed-off-by: Steven Rostedt (Google)