From patchwork Thu Oct 19 23:08:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13429935 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7AC39C07480 for ; Thu, 19 Oct 2023 23:09:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346705AbjJSXJP (ORCPT ); Thu, 19 Oct 2023 19:09:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346702AbjJSXJO (ORCPT ); Thu, 19 Oct 2023 19:09:14 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F6D6106; Thu, 19 Oct 2023 16:09:09 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 179AFC433C8; Thu, 19 Oct 2023 23:09:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1697756949; bh=8yGOMG36olUp/akMh6rkuC0OaLA9uG3cci6pDHR/HKQ=; h=From:Date:Subject:To:Cc:From; b=iaONNIo4GXEAc6LG9sii40eI0VJA2RVDByIZU2NBnbRR8wwh6qRYCrHRLUZRXioIA Xa0P6ZNX4g07KD2y4SmAVbVPVLlbOVcNFnSy34jQFLa88Yqv3NjHmGumKlq0Erxe0E 3/c9dV7mYCly5QMt9ZfDzHDdLpY1jPCrBeEocsib7exqqDjEyq+7hvljuaQTVZN09I 0V4NvQjygZ3z87xeUo31vtHRtu1PW0BR65RvQWTS9fdPNpvC955rJHHyHByWFAPZy7 ASU67y0TyXT6e9obouXjYDsVRAqcc99aGEOQ24VDlRFJ4Ggnk29bfYC0/woqVgp8qT 3mhd0mjN+/8Ng== From: Mark Brown Date: Fri, 20 Oct 2023 00:08:12 +0100 Subject: [PATCH] selftests/clone3: Skip new time namespace test when unsupported MIME-Version: 1.0 Message-Id: <20231020-kselftest-clone3-time-ns-v1-1-31a17e072a05@kernel.org> X-B4-Tracking: v=1; b=H4sIANy2MWUC/x3MQQqDMBBG4avIrDuQGGlsr1JctPFPO2hjyQQpi Hc3uPwW722kyAKle7NRxioqS6qwl4bC55neYBmrqTWts8beeFLMsUALh3lJcFzkC07K3pnXNXa 298FTzX8ZUf7n+jHs+wF42ZOHagAAAA== To: Christian Brauner , Shuah Khan , Tiezhu Yang , Tobias Klauser Cc: Thomas Gleixner , Andrew Morton , Stephen Rothwell , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-0438c X-Developer-Signature: v=1; a=openpgp-sha256; l=2679; i=broonie@kernel.org; h=from:subject:message-id; bh=8yGOMG36olUp/akMh6rkuC0OaLA9uG3cci6pDHR/HKQ=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlMbcRep0GTdt5oyAi825blRZSaZH7USK88m/1E3BS UKczc0iJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZTG3EQAKCRAk1otyXVSH0KW5B/ 4u8e3wydjWCGQEJ3+M0KT+Tky+F6+CuKDBXeJActy6lTbpjsKP5MvRhI503Z8alJVCI81xegAC7cHM MaE+/vltgmRHlkdGi2s5BQbMYNK1kIbopX6ize2XAsNiZC8sIW3ReK35Q31Lceoak625eN4vldBm9S cYLl9UEeddxNPUK1f2xexmxZxtF2XEsOILhROPVrBp38eWJWniFqORJN11gRqLQN+1KZ9gjSkm5j33 YnPGKeDF8Odw7ARshA4dcIJujm1VTECf7dFf4fZucQC91yLKDWbvJvbzoMP3qc7EPl0Wq5l/XNAm+l AdrJhF54FmtsHvR31M0FNCdYBfBewg X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Use a filter function to skip the time namespace test on systems with !CONFIG_TIME_NS. This reworks a fix originally done by Tiezhu Yang prior to the refactoring in 34dce23f7e40 ("selftests/clone3: Report descriptive test names"). The changelog from their fix explains the issue very clearly: When execute the following command to test clone3 under !CONFIG_TIME_NS: # make headers && cd tools/testing/selftests/clone3 && make && ./clone3 we can see the following error info: # [7538] Trying clone3() with flags 0x80 (size 0) # Invalid argument - Failed to create new process # [7538] clone3() with flags says: -22 expected 0 not ok 18 [7538] Result (-22) is different than expected (0) ... # Totals: pass:18 fail:1 xfail:0 xpass:0 skip:0 error:0 This is because if CONFIG_TIME_NS is not set, but the flag CLONE_NEWTIME (0x80) is used to clone a time namespace, it will return -EINVAL in copy_time_ns(). If kernel does not support CONFIG_TIME_NS, /proc/self/ns/time will be not exist, and then we should skip clone3() test with CLONE_NEWTIME. With this patch under !CONFIG_TIME_NS: # make headers && cd tools/testing/selftests/clone3 && make && ./clone3 ... # Time namespaces are not supported ok 18 # SKIP Skipping clone3() with CLONE_NEWTIME ... # Totals: pass:18 fail:0 xfail:0 xpass:0 skip:1 error:0 Fixes: 515bddf0ec41 ("selftests/clone3: test clone3 with CLONE_NEWTIME") Suggested-by: Thomas Gleixner Original-fix-from: Tiezhu Yang Signed-off-by: Mark Brown --- tools/testing/selftests/clone3/clone3.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- base-commit: 8d4099dd0727acfc8b0f644eacaf852f9d5dc649 change-id: 20231019-kselftest-clone3-time-ns-730b6f4187c7 Best regards, diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c index 9429d361059e..915846bc32cc 100644 --- a/tools/testing/selftests/clone3/clone3.c +++ b/tools/testing/selftests/clone3/clone3.c @@ -138,6 +138,16 @@ static bool not_root(void) return false; } +static bool timens_unsupported(void) +{ + if (access("/proc/self/ns/time", F_OK) == 0) { + ksft_print_msg("Time namespaces are not supported\n"); + return true; + } + + return false; +} + static size_t page_size_plus_8(void) { return getpagesize() + 8; @@ -282,6 +292,7 @@ static const struct test tests[] = { .size = 0, .expected = 0, .test_mode = CLONE3_ARGS_NO_TEST, + .filter = timens_unsupported, }, { .name = "exit signal (SIGCHLD) in flags",