From patchwork Fri Nov 11 18:35:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kristen Carlson Accardi X-Patchwork-Id: 13040709 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 EA3EAC4332F for ; Fri, 11 Nov 2022 18:37:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233958AbiKKShB (ORCPT ); Fri, 11 Nov 2022 13:37:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234334AbiKKSg1 (ORCPT ); Fri, 11 Nov 2022 13:36:27 -0500 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE2A6178A6; Fri, 11 Nov 2022 10:36:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668191779; x=1699727779; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=qDw1+KlOA5sa/9TNbGFSCosxMRaFIDw8SgzYI5H+AWg=; b=isfnaWRjwuVMTz7qupQcJpeA5mJyp0cM8SxoRmcmL8y1s2UNL6r95fdQ 2vtLWDWTi8nJZhMEJJkOl3t1zhh1FyJU2rMQOhybxVAG0HMmtt36yHERl hjtWKXfOTe6yl7q2pTrgKY6uzYVjwqGkW4Ml/iP9BXkbgPrdxIEWTcq0M gNhrNL2ZnopOBHXZKsL5YTIZ8dnqoiXHzawEapwzfm0zpyD1y+f9BhQjb lTWktPfsblzcPsiyYZfELSXzH0Ai6vAtouYXNgYesjaPWx687yJCoVkYm nQXIcfNcxUpwkI4ls4W/SdAZjgyIKafaT6E0wS9Vo+2dPbRcEFljd+knK g==; X-IronPort-AV: E=McAfee;i="6500,9779,10528"; a="313447727" X-IronPort-AV: E=Sophos;i="5.96,157,1665471600"; d="scan'208";a="313447727" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2022 10:36:19 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10528"; a="640089422" X-IronPort-AV: E=Sophos;i="5.96,157,1665471600"; d="scan'208";a="640089422" Received: from hermesli-mobl.amr.corp.intel.com (HELO kcaccard-desk.amr.corp.intel.com) ([10.212.218.5]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2022 10:36:18 -0800 From: Kristen Carlson Accardi To: jarkko@kernel.org, dave.hansen@linux.kernel.org, tj@kernel.org, linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org, cgroups@vger.kernel.org, Zefan Li , Johannes Weiner Cc: zhiquan1.li@intel.com, Kristen Carlson Accardi Subject: [PATCH 22/26] cgroup/misc: Add private per cgroup data to struct misc_cg Date: Fri, 11 Nov 2022 10:35:27 -0800 Message-Id: <20221111183532.3676646-23-kristen@linux.intel.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221111183532.3676646-1-kristen@linux.intel.com> References: <20221111183532.3676646-1-kristen@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org The SGX driver needs to be able to store additional per cgroup data specific to SGX along with the misc_cg struct. Add the ability to get and set this data in struct misc_cg. Signed-off-by: Kristen Carlson Accardi --- include/linux/misc_cgroup.h | 12 ++++++++++++ kernel/cgroup/misc.c | 39 +++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/include/linux/misc_cgroup.h b/include/linux/misc_cgroup.h index c00deae4d2df..7fbf3efb0f62 100644 --- a/include/linux/misc_cgroup.h +++ b/include/linux/misc_cgroup.h @@ -43,6 +43,7 @@ struct misc_res { unsigned long max; atomic_long_t usage; atomic_long_t events; + void *priv; }; /** @@ -63,6 +64,8 @@ struct misc_cg *root_misc(void); struct misc_cg *parent_misc(struct misc_cg *cg); unsigned long misc_cg_read(enum misc_res_type type, struct misc_cg *cg); unsigned long misc_cg_max(enum misc_res_type type, struct misc_cg *cg); +void *misc_cg_get_priv(enum misc_res_type type, struct misc_cg *cg); +void misc_cg_set_priv(enum misc_res_type type, struct misc_cg *cg, void *priv); unsigned long misc_cg_res_total_usage(enum misc_res_type type); int misc_cg_set_capacity(enum misc_res_type type, unsigned long capacity); int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg, @@ -130,6 +133,15 @@ static inline unsigned long misc_cg_max(enum misc_res_type type, struct misc_cg return 0; } +static void *misc_cg_get_priv(enum misc_res_type type, struct misc_cg *cg) +{ + return NULL; +} + +static void misc_cg_set_priv(enum misc_res_type type, struct misc_cg *cg, void *priv) +{ +} + static inline unsigned long misc_cg_res_total_usage(enum misc_res_type type) { return 0; diff --git a/kernel/cgroup/misc.c b/kernel/cgroup/misc.c index 18d0bec7d609..642879ad136f 100644 --- a/kernel/cgroup/misc.c +++ b/kernel/cgroup/misc.c @@ -251,6 +251,45 @@ unsigned long misc_cg_max(enum misc_res_type type, struct misc_cg *cg) } EXPORT_SYMBOL_GPL(misc_cg_max); +/** + * misc_cg_get_priv() - Return the priv value of the misc cgroup res. + * @type: Type of the misc res. + * @cg: Misc cgroup whose priv will be read + * + * Context: Any context. + * Return: + * The value of the priv field for the specified misc cgroup. + * If an invalid misc_res_type is given, NULL will be returned. + */ +void *misc_cg_get_priv(enum misc_res_type type, struct misc_cg *cg) +{ + if (!(valid_type(type) && cg)) + return NULL; + + return cg->res[type].priv; +} +EXPORT_SYMBOL_GPL(misc_cg_get_priv); + +/** + * misc_cg_set_priv() - Set the priv value of the misc cgroup res. + * @type: Type of the misc res. + * @cg: Misc cgroup whose priv will be written + * @priv: Value to store in the priv field of the struct misc_cg + * + * If an invalid misc_res_type is given, the priv data will not be + * stored. + * + * Context: Any context. + */ +void misc_cg_set_priv(enum misc_res_type type, struct misc_cg *cg, void *priv) +{ + if (!(valid_type(type) && cg)) + return; + + cg->res[type].priv = priv; +} +EXPORT_SYMBOL_GPL(misc_cg_set_priv); + /** * misc_cg_max_show() - Show the misc cgroup max limit. * @sf: Interface file