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 E33992E2665; Tue, 28 Oct 2025 08:46:45 +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=1761641206; cv=none; b=jVazlyrRWXvzq5aO7J+Xg5nooDrE/C0mpOLRxsJFGwiHHSISPT3EolfFA/s+1RMyfzvEd5yPZ3vX3kVioIxqVbq72teiXGjbcEtowDHc/yc1n2sYkMMQzSvt2QlJUAjQ0k1M6GRV+jsnLoFTKZdlStq5z23HpWByqxyegW0NBbU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761641206; c=relaxed/simple; bh=hhfR84YF5lZTjazsMeCF8Xrlqvbl2cEysbsmUtLrx3s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=uyFCk6P2rM//GcYB6BQ7NwglX4GgGXtrP9IWbsdC9LuM+0gqpD1LSWdd/8qnAIiXm9IjlWoiVr7xwMY7mHsAKJRIt6uxv1MpVfK+9bfYa2V7+SaRc+u7HjPq/v777tnk4kY8r7kmxM0zmncPqHepMNKp3XLzWsKd6RMG5aQCMmI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DVf0g1Aj; 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="DVf0g1Aj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31A32C4CEE7; Tue, 28 Oct 2025 08:46:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761641205; bh=hhfR84YF5lZTjazsMeCF8Xrlqvbl2cEysbsmUtLrx3s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=DVf0g1Aj/lcgvXRH2S7/oytpHkW7+MGxwzeyVWxBsxjqwSoCVXIzWKJb9ucnugVaq kKUzsW7p8nU1ps6B0oahs3dwXiCxAu0clV3UUoFH7rnOfMWF0XRhCqeu76C+9/0xGO RpAMZLqXUs2FiB+dJ3uunvRgu7jlJLn34gjV25hldv4UyU8rh65us5Xerf5j8kazbH LQwxWrofsolk+buB4n7JGPHaH7OsXvPF85ykmYfqDlKDLLOIbUroqUV2GKzpZ1Pcwp trGxHdvX8YGs6zo0zqVzBQB8EChyKspxNWipiqreuFx/kcCKw0ZWRRhpl/QGWKvZcm iksQJO/Xvdk7g== From: Christian Brauner Date: Tue, 28 Oct 2025 09:45:55 +0100 Subject: [PATCH 10/22] selftests/pidfd: add first 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-v1-10-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=2041; i=brauner@kernel.org; h=from:subject:message-id; bh=hhfR84YF5lZTjazsMeCF8Xrlqvbl2cEysbsmUtLrx3s=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQyNB36EHeqVnl/94z2lA6Js/8Pdb6YlS5abc5zOXEn8 yM32+dlHaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABPRfsjIMHnVG+tDWWxdD2qC eVQad+ydYnb8ls/ETTYyX82eLWw8uISRYUd7zc4qnt2vTq0/1ML1lWOn5+MXBQduNJ3lXr3y3R7 OLA4A X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Verify that when PIDFD_INFO_SUPPORTED_MASK is requested, the kernel returns the supported_mask field indicating which flags the kernel supports. Signed-off-by: Christian Brauner --- tools/testing/selftests/pidfd/pidfd_info_test.c | 41 +++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/tools/testing/selftests/pidfd/pidfd_info_test.c b/tools/testing/selftests/pidfd/pidfd_info_test.c index a0eb6e81eaa2..b31a0597fbae 100644 --- a/tools/testing/selftests/pidfd/pidfd_info_test.c +++ b/tools/testing/selftests/pidfd/pidfd_info_test.c @@ -690,4 +690,45 @@ TEST_F(pidfd_info, thread_group_exec_thread) EXPECT_EQ(close(pidfd_thread), 0); } +/* + * Test: PIDFD_INFO_SUPPORTED_MASK field + * + * Verify that when PIDFD_INFO_SUPPORTED_MASK is requested, the kernel + * returns the supported_mask field indicating which flags the kernel supports. + */ +TEST(supported_mask_field) +{ + struct pidfd_info info = { + .mask = PIDFD_INFO_SUPPORTED_MASK, + }; + int pidfd; + pid_t pid; + + pid = create_child(&pidfd, 0); + ASSERT_GE(pid, 0); + + if (pid == 0) + pause(); + + /* Request supported_mask field */ + ASSERT_EQ(ioctl(pidfd, PIDFD_GET_INFO, &info), 0); + + /* Verify PIDFD_INFO_SUPPORTED_MASK is set in the reply */ + ASSERT_TRUE(!!(info.mask & PIDFD_INFO_SUPPORTED_MASK)); + + /* Verify supported_mask contains expected flags */ + ASSERT_TRUE(!!(info.supported_mask & PIDFD_INFO_PID)); + ASSERT_TRUE(!!(info.supported_mask & PIDFD_INFO_CREDS)); + ASSERT_TRUE(!!(info.supported_mask & PIDFD_INFO_CGROUPID)); + ASSERT_TRUE(!!(info.supported_mask & PIDFD_INFO_EXIT)); + ASSERT_TRUE(!!(info.supported_mask & PIDFD_INFO_COREDUMP)); + ASSERT_TRUE(!!(info.supported_mask & PIDFD_INFO_SUPPORTED_MASK)); + ASSERT_TRUE(!!(info.supported_mask & PIDFD_INFO_COREDUMP_SIGNAL)); + + /* 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