From patchwork Mon Jul 17 13:14:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 13315672 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 D3362EB64DC for ; Mon, 17 Jul 2023 13:16:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231441AbjGQNQZ (ORCPT ); Mon, 17 Jul 2023 09:16:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231447AbjGQNP5 (ORCPT ); Mon, 17 Jul 2023 09:15:57 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E47AB1BDA; Mon, 17 Jul 2023 06:15:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1689599745; x=1721135745; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/1/VJsytpG9ab8tNQhkRW6NqEkFFS16dN1lelPWiwFU=; b=CJjf36mL4LGZBHkCaBvLOVAEjhPOzv2h4xnLwBMn//Yezcd7hOq/P5/z JkdTwaHyY6QngVzRO0BwrmsWRiBXe/InwAt32xW9HVstfaPQZJMNzJ7FV 7dH7N4wNBSOKPqoEHnZGvFGV+0kkMaAWyiSUegV7hKlOCx3dg0Qs5yqR2 grQrN7gdfvRg8gvMXbEtExnHHDVc94146/U644fchBPt4XWwg2+FIqTiq x+DbVM3f0YcA5qytyCfwevU3HqawJA2HbeCRtYGttRN7jGDgWCzeHT9ec O5AvnyuLtNfmBSiBibUp2XtxXKn4WwUMQVnUyrhfKoLwfWSvTjtkZ5Hg6 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10774"; a="368568907" X-IronPort-AV: E=Sophos;i="6.01,211,1684825200"; d="scan'208";a="368568907" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jul 2023 06:15:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10774"; a="793246780" X-IronPort-AV: E=Sophos;i="6.01,211,1684825200"; d="scan'208";a="793246780" Received: from dkravtso-mobl1.ccr.corp.intel.com (HELO ijarvine-mobl2.ger.corp.intel.com) ([10.252.45.233]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jul 2023 06:15:41 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: linux-kselftest@vger.kernel.org, Reinette Chatre , Shuah Khan , Shaopeng Tan , Fenghua Yu , Maciej Wieczor-Retman , linux-kernel@vger.kernel.org Cc: =?utf-8?q?Ilpo_J=C3=A4rvinen?= Subject: [PATCH v5 07/19] selftests/resctrl: Refactor remount_resctrl(bool mum_resctrlfs) to mount_resctrl() Date: Mon, 17 Jul 2023 16:14:55 +0300 Message-Id: <20230717131507.32420-8-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230717131507.32420-1-ilpo.jarvinen@linux.intel.com> References: <20230717131507.32420-1-ilpo.jarvinen@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Mount/umount of the resctrl FS is now paired nicely per test. Rename remount_resctrl(bool mum_resctrlfs) to mount_resctrl(). Make it unconditionally try to mount the resctrl FS and return error if resctrl FS was mounted already. While at it, group the mount/umount prototypes in the header. Signed-off-by: Ilpo Järvinen --- tools/testing/selftests/resctrl/resctrl.h | 2 +- .../testing/selftests/resctrl/resctrl_tests.c | 8 +++---- tools/testing/selftests/resctrl/resctrlfs.c | 23 ++++++------------- 3 files changed, 12 insertions(+), 21 deletions(-) diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index f455f0b7e314..23af3fb73cb4 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -85,8 +85,8 @@ extern char llc_occup_path[1024]; int get_vendor(void); bool check_resctrlfs_support(void); int filter_dmesg(void); -int remount_resctrlfs(bool mum_resctrlfs); int get_resource_id(int cpu_no, int *resource_id); +int mount_resctrlfs(void); int umount_resctrlfs(void); int validate_bw_report_request(char *bw_report); bool validate_resctrl_feature_request(const char *resctrl_val); diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c index 6bf4ead74496..0363c4b607d2 100644 --- a/tools/testing/selftests/resctrl/resctrl_tests.c +++ b/tools/testing/selftests/resctrl/resctrl_tests.c @@ -77,7 +77,7 @@ static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span, ksft_print_msg("Starting MBM BW change ...\n"); - res = remount_resctrlfs(true); + res = mount_resctrlfs(); if (res) { ksft_exit_fail_msg("Failed to mount resctrl FS\n"); return; @@ -106,7 +106,7 @@ static void run_mba_test(bool has_ben, char **benchmark_cmd, int span, ksft_print_msg("Starting MBA Schemata change ...\n"); - res = remount_resctrlfs(true); + res = mount_resctrlfs(); if (res) { ksft_exit_fail_msg("Failed to mount resctrl FS\n"); return; @@ -132,7 +132,7 @@ static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no) ksft_print_msg("Starting CMT test ...\n"); - res = remount_resctrlfs(true); + res = mount_resctrlfs(); if (res) { ksft_exit_fail_msg("Failed to mount resctrl FS\n"); return; @@ -160,7 +160,7 @@ static void run_cat_test(int cpu_no, int no_of_bits) ksft_print_msg("Starting CAT test ...\n"); - res = remount_resctrlfs(true); + res = mount_resctrlfs(); if (res) { ksft_exit_fail_msg("Failed to mount resctrl FS\n"); return; diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c index edc3f92b11b1..c45666942439 100644 --- a/tools/testing/selftests/resctrl/resctrlfs.c +++ b/tools/testing/selftests/resctrl/resctrlfs.c @@ -48,29 +48,20 @@ static int find_resctrl_mount(char *buffer) } /* - * remount_resctrlfs - Remount resctrl FS at /sys/fs/resctrl - * @mum_resctrlfs: Should the resctrl FS be remounted? + * mount_resctrlfs - Mount resctrl FS at /sys/fs/resctrl * - * If not mounted, mount it. - * If mounted and mum_resctrlfs then remount resctrl FS. - * If mounted and !mum_resctrlfs then noop + * Mounts resctrl FS. Fails if resctrl FS is already mounted to avoid + * pre-existing settings interfering with the test results. * * Return: 0 on success, non-zero on failure */ -int remount_resctrlfs(bool mum_resctrlfs) +int mount_resctrlfs(void) { - char mountpoint[256]; int ret; - ret = find_resctrl_mount(mountpoint); - if (ret) - strcpy(mountpoint, RESCTRL_PATH); - - if (!ret && mum_resctrlfs && umount(mountpoint)) - ksft_print_msg("Fail: unmounting \"%s\"\n", mountpoint); - - if (!ret && !mum_resctrlfs) - return 0; + ret = find_resctrl_mount(NULL); + if (ret != -ENOENT) + return -1; ksft_print_msg("Mounting resctrl to \"%s\"\n", RESCTRL_PATH); ret = mount("resctrl", RESCTRL_PATH, "resctrl", 0, NULL);