From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5838E2DAFA1; Tue, 28 Oct 2025 08:46:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761641210; cv=none; b=mFkZK1ob1X7wDKAav7mtjcBZh7rHpdH2mn3qaHfAPInEJrMEy8pi8lqUz1HwdDqWROiryDsvDLaF6pMfLVNXVnFUNap0HY40WGwoKvp/0Rd5eenMVonZOAef+B+xK/3CnrCUbY6Ewy3gXzwsKykURhl9/fswFVWUUBxG/mEsQIM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761641210; c=relaxed/simple; bh=2e6DA30gxSXi8cjOewZa+j3/ROxol/MC+sx0d2mHTZc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=f5EqtYBiWPGLv/OduoCu4A5ZnKt/qfXK+2xxXyywKUDtK7/IybFK357rsUE2DOBE2KXgYPONsFDvxfrU4i/IOF6GXYjbvADHAPui1I8ncVg40/LBGVWhYJk2LjA13nP2NmHVK2sAeVZr9VSNoBTsiaVTLeaegYiifSvnH9BsNqY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sijCbF9V; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sijCbF9V" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0BE94C4CEFF; Tue, 28 Oct 2025 08:46:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761641210; bh=2e6DA30gxSXi8cjOewZa+j3/ROxol/MC+sx0d2mHTZc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=sijCbF9Vi7FDmoS+XPuM5PQIG8yjIGkWSbyU9T1ArTM9EztOj0XYFcMjWb0O/RB6i V4NG6cJC0SWokwiBiQnhUj8xadr7SgfZhvJI/IpMLdWKXZxjuwhzaN16f7Jzc56lQ9 VRjKjlMw2ksZ08ZYvSIh2q88840wpDpeOnv1ZQpccBYCYj7gNURGwoFw3thkk5wPgH Sdiame94egeioTZgWWpt4URBQ9k07r4uZxMEKQmo9lHTEvCt2EpgDZQT2OyERIDgT3 pK/x4Fd3+i+xZZSG1RpiWf2A+zfONJRf9CHOcqC9G5oSeIPI6x03SsEmA3jhOYJshn jxdOd9+iuZRLQ== From: Christian Brauner Date: Tue, 28 Oct 2025 09:45:56 +0100 Subject: [PATCH 11/22] selftests/pidfd: add second supported_mask test Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251028-work-coredump-signal-v1-11-ca449b7b7aa0@kernel.org> References: <20251028-work-coredump-signal-v1-0-ca449b7b7aa0@kernel.org> In-Reply-To: <20251028-work-coredump-signal-v1-0-ca449b7b7aa0@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Oleg Nesterov , Amir Goldstein , Aleksa Sarai , Yu Watanabe , Josef Bacik , Jeff Layton , Jann Horn , Luca Boccassi , Alexander Mikhalitsyn , linux-kernel@vger.kernel.org, Alexander Viro , Jan Kara , Lennart Poettering , Mike Yuan , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=1435; i=brauner@kernel.org; h=from:subject:message-id; bh=2e6DA30gxSXi8cjOewZa+j3/ROxol/MC+sx0d2mHTZc=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQyNB1aeeDoz6KpLzTutFQ85Ziz8zq72A+LEPMdKlfnx 7zYfWfm7I5SFgYxLgZZMUUWh3aTcLnlPBWbjTI1YOawMoEMYeDiFICJJAgz/NOfc831scntbnH5 zQycRkunOsj/FQyaecm/Rir3q5GWrRAjQ9dHtf87D3yNKb75YML95nV+Mo+v28x0XWVkO0PPWP3 oUkYA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Verify that supported_mask is returned even when other fields are requested. Signed-off-by: Christian Brauner --- tools/testing/selftests/pidfd/pidfd_info_test.c | 32 +++++++++++++++++++++++++ 1 file changed, 32 insertions(+) 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 -- 2.47.3