From patchwork Mon May 20 12:30:17 2024 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: 797928 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) (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 148C359147; Mon, 20 May 2024 12:32:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.19 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716208349; cv=none; b=OkZMHRvZGGqxQHJLFYd1ThpOpqqQzklvSes3RnXPa+F0la5oDoQKRUkwLCU2+HAW6GU5nxiKfqpTyUFJmvXi4WYuUV2KWRORD5mj2I8vVgW3KUL9k4ZFQP2aalolcTmbDswb5MOaX7iMNwZjSu3qRrjnaHwuV9/Tukot04VG+r4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716208349; c=relaxed/simple; bh=zcaBoK/ACFrIjjdFXj8eyQESy8iAslUg8GB4EQy4ers=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=LCZv/LYsiP7MmyJ8kK+QnP4g/h035WLhRrIy48wv2JVdhLmiwGLJzzHe4O7KguZmPUySgf8phruIi68x6axy3iDLIJhOd7cL+hVUH7DganEmLtsNyso0O948+2fcDgp0VaKKvMlpiwMb9XLvhV/ZLthu3dise9za6qz0wOEZ9H0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=I1ZPR5KU; arc=none smtp.client-ip=198.175.65.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="I1ZPR5KU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1716208348; x=1747744348; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=zcaBoK/ACFrIjjdFXj8eyQESy8iAslUg8GB4EQy4ers=; b=I1ZPR5KUO96o2odX7FAmXeg8BeC7mwXs9fNC+VebRDJaytbRUr+HM0rD VjyuOwFjFhourm2yXqJg19Tz2ilAqmJWlILsN5sx+4335rcRfUS0C4e3G qNM2UJG9gTy7U0ER+JqmRTV+lAV6IOuyIzHvIUSQOG8AatKOkGzsE0a3L pnoeMbwzxHGiw2GExdn8909Lvfhgg4ahJD9gvxU/hIwlLY3H3oSqRnJYH 8dKhmZGwxvXaSkFPWQ5FGmkrm7d+I/NOEQSky0+uycCL9UAtc9SoSI4fI /OimQ7/S7ikRaYffH0kx3knCaZzi0nWLBo03kdOmQkKQtrUOL6aywXRYJ Q==; X-CSE-ConnectionGUID: NIR5mArpQ0qcSV55N5UsXA== X-CSE-MsgGUID: 6h1h4VlXTb22H+8dIAlyRg== X-IronPort-AV: E=McAfee;i="6600,9927,11078"; a="12180558" X-IronPort-AV: E=Sophos;i="6.08,175,1712646000"; d="scan'208";a="12180558" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 May 2024 05:32:28 -0700 X-CSE-ConnectionGUID: sz8r3dBKS0iodzgPVEo8qQ== X-CSE-MsgGUID: LN7xEZuhRSq2z5LHB1gVHg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,175,1712646000"; d="scan'208";a="33091294" Received: from unknown (HELO localhost) ([10.245.247.114]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 May 2024 05:32:24 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: linux-kselftest@vger.kernel.org, Reinette Chatre , Shuah Khan , Babu Moger , =?utf-8?q?Maciej_Wiecz=C3=B3r-Retman?= Cc: linux-kernel@vger.kernel.org, Fenghua Yu , Shuah Khan , =?utf-8?q?Ilpo_J=C3=A4rvinen?= Subject: [PATCH v4 13/16] selftests/resctrl: Convert ctrlgrp & mongrp to pointers Date: Mon, 20 May 2024 15:30:17 +0300 Message-Id: <20240520123020.18938-14-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240520123020.18938-1-ilpo.jarvinen@linux.intel.com> References: <20240520123020.18938-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The struct resctrl_val_param has control and monitor groups as char arrays but they are not supposed to be mutated within resctrl_val(). Convert the ctrlgrp and mongrp char array within resctrl_val_param to plain const char pointers and adjust the strlen() based checks to check NULL instead. Convert !grp_name check in create_grp() into internal sanity check by returning error if the caller asked to create a group but doesn't provide a name for the group. The existing code already abides this by only calling create_grp() if mongrp is non-NULL so the error should never be returned with the current selftests (ctrlgrp is never NULL). Signed-off-by: Ilpo Järvinen --- v3: - Removed wrong comment - Changed grp_name check to return -1 on fail (internal sanity check) --- tools/testing/selftests/resctrl/resctrl.h | 4 ++-- tools/testing/selftests/resctrl/resctrlfs.c | 15 +++++---------- 2 files changed, 7 insertions(+), 12 deletions(-) diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index 5967389038d4..a999fbc13fd3 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -91,8 +91,8 @@ struct resctrl_test { */ struct resctrl_val_param { char *resctrl_val; - char ctrlgrp[64]; - char mongrp[64]; + const char *ctrlgrp; + const char *mongrp; char filename[64]; unsigned long mask; int num_of_runs; diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c index a0e84157eb63..6b4448588666 100644 --- a/tools/testing/selftests/resctrl/resctrlfs.c +++ b/tools/testing/selftests/resctrl/resctrlfs.c @@ -464,13 +464,8 @@ static int create_grp(const char *grp_name, char *grp, const char *parent_grp) struct dirent *ep; DIR *dp; - /* - * At this point, we are guaranteed to have resctrl FS mounted and if - * length of grp_name == 0, it means, user wants to use root con_mon - * grp, so do nothing - */ - if (strlen(grp_name) == 0) - return 0; + if (!grp_name) + return -1; /* Check if requested grp exists or not */ dp = opendir(parent_grp); @@ -541,7 +536,7 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, const char *ctrlgrp, char tasks[1024]; int ret = 0; - if (strlen(ctrlgrp)) + if (ctrlgrp) sprintf(controlgroup, "%s/%s", RESCTRL_PATH, ctrlgrp); else sprintf(controlgroup, "%s", RESCTRL_PATH); @@ -558,7 +553,7 @@ int write_bm_pid_to_resctrl(pid_t bm_pid, const char *ctrlgrp, /* Create mon grp and write pid into it for "mbm" and "cmt" test */ if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR)) || !strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) { - if (strlen(mongrp)) { + if (mongrp) { sprintf(monitorgroup_p, "%s/mon_groups", controlgroup); sprintf(monitorgroup, "%s/%s", monitorgroup_p, mongrp); ret = create_grp(mongrp, monitorgroup, monitorgroup_p); @@ -612,7 +607,7 @@ int write_schemata(const char *ctrlgrp, char *schemata, int cpu_no, goto out; } - if (strlen(ctrlgrp) != 0) + if (ctrlgrp) sprintf(controlgroup, "%s/%s/schemata", RESCTRL_PATH, ctrlgrp); else sprintf(controlgroup, "%s/schemata", RESCTRL_PATH);