diff options
| author | Christian Brauner <brauner@kernel.org> | 2025-10-28 09:45:56 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-11-04 22:04:38 +0100 |
| commit | 2593deaac80f84a95d62d40fc414bfe546444d8f (patch) | |
| tree | 7473518c5d6709cbfa6aa3dc076b94b556956bfe | |
| parent | e12f734208c5415a7fef92bafcc572afbd9ec8e8 (diff) | |
selftests/pidfd: add second supported_mask test
Verify that supported_mask is returned even when other fields are
requested.
Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-11-ca449b7b7aa0@kernel.org
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
| -rw-r--r-- | tools/testing/selftests/pidfd/pidfd_info_test.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/testing/selftests/pidfd/pidfd_info_test.c b/tools/testing/selftests/pidfd/pidfd_info_test.c index b31a0597fbae..cb5430a2fd75 100644 --- a/tools/testing/selftests/pidfd/pidfd_info_test.c +++ b/tools/testing/selftests/pidfd/pidfd_info_test.c @@ -731,4 +731,36 @@ TEST(supported_mask_field) close(pidfd); } +/* + * Test: PIDFD_INFO_SUPPORTED_MASK always available + * + * Verify that supported_mask is returned even when other fields are requested. + */ +TEST(supported_mask_with_other_fields) +{ + struct pidfd_info info = { + .mask = PIDFD_INFO_CGROUPID | PIDFD_INFO_SUPPORTED_MASK, + }; + int pidfd; + pid_t pid; + + pid = create_child(&pidfd, 0); + ASSERT_GE(pid, 0); + + if (pid == 0) + pause(); + + ASSERT_EQ(ioctl(pidfd, PIDFD_GET_INFO, &info), 0); + + /* Both fields should be present */ + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_CGROUPID)); + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_SUPPORTED_MASK)); + ASSERT_NE(info.supported_mask, 0); + + /* Clean up */ + sys_pidfd_send_signal(pidfd, SIGKILL, NULL, 0); + sys_waitid(P_PIDFD, pidfd, NULL, WEXITED); + close(pidfd); +} + TEST_HARNESS_MAIN |