From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DATE_IN_PAST_06_12, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1456CC2BBCF for ; Wed, 16 Dec 2020 12:23:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B887623123 for ; Wed, 16 Dec 2020 12:23:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725922AbgLPMXf (ORCPT ); Wed, 16 Dec 2020 07:23:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725385AbgLPMXe (ORCPT ); Wed, 16 Dec 2020 07:23:34 -0500 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B51A2C0617B0 for ; Wed, 16 Dec 2020 04:22:54 -0800 (PST) Received: by mail-pf1-x443.google.com with SMTP id d2so16490398pfq.5 for ; Wed, 16 Dec 2020 04:22:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:from:to:cc:subject:date:message-id:in-reply-to :references; bh=qctVoLqLrLBmGRCNTA/LJq+zgDmEQCsxOSkOo/XtDOc=; b=LobP0CPb1KEJYbkj8P08x4w9ICo4aZEv8yrRMxrw6Xc7280L3IXvIdzVUmT5yHpLkB SKgzlF/AGKo6HMt7GoSHRN4IsWM7NCbwfUJfd5pKI3WMOKt4RiIkMWLlDzmNJnAmgauz iNUc8UaMCviJq4YUyhTWmnnZbWWxqRvqaUY+I= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :in-reply-to:references; bh=qctVoLqLrLBmGRCNTA/LJq+zgDmEQCsxOSkOo/XtDOc=; b=DAKRzmc34ota8mAQXPqhLihWmE+G75hoxCJ7idOl1yTmRf/NRW3pvLIZlBN7aj/G63 I5YVg8roZq4bbzU9JCWmsklr6S+Yrt+fCQ+qDKb2wvCgJRjRSMiecHKH1OzzCBwkoQDG 06b7am1rUmJrNHFTr+Qvk3WYbxUerayskGaM1qsob/hs07AkmE+AHXzsXe7t4GJTB41i kUxQDr1B09H3EcW2yEAFnj+2p5APnVcmdoItWGJi6OHO2E42DDTUBKMzvdZTA3VajKq8 RnpQGbmnrxKaPYZi+1AchjPzKk+EB26MXKt4jhqduzDaIvVJ57H/+IQlhfUhMHKTkIAz 9wkA== MIME-Version: 1.0 X-Gm-Message-State: AOAM531miivrlRHJCvQSXAt4MLzL2yhc3hUFM+/7CxT4Gbv1lTKy1kYB hQLYQtiND7uraLr6/kxcPbavv+jON2tHFHkKBiCIrSDXqVRShqXxJGcOGyFpg/jTfmbnG2SPe53 esPPzM5p7MGBC X-Google-Smtp-Source: ABdhPJzXyVgZ2T1zAW7ny7CJ9Za5FjjawkbwRf/DXr+qtg0PcfRPTJpVXtIJE0DqjqU9L/DoU+MXZA== X-Received: by 2002:a63:5762:: with SMTP id h34mr6557689pgm.2.1608121374128; Wed, 16 Dec 2020 04:22:54 -0800 (PST) Received: from localhost.localdomain ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id s7sm2477296pfh.207.2020.12.16.04.22.50 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 Dec 2020 04:22:53 -0800 (PST) From: Muneendra To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, tj@kernel.org, linux-nvme@lists.infradead.org, hare@suse.de Cc: jsmart2021@gmail.com, emilne@redhat.com, mkumar@redhat.com, pbonzini@redhat.com, Muneendra Subject: [PATCH v5 02/16] blkcg: Added a app identifier support for blkcg Date: Wed, 16 Dec 2020 10:59:32 +0530 Message-Id: <1608096586-21656-3-git-send-email-muneendra.kumar@broadcom.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1608096586-21656-1-git-send-email-muneendra.kumar@broadcom.com> References: <1608096586-21656-1-git-send-email-muneendra.kumar@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000004849ab05b693ef1b" Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org --0000000000004849ab05b693ef1b Content-Type: text/plain; charset="US-ASCII" This Patch added a unique application identifier i.e fc_app_id member in blkcg which allows identification of traffic sources at an individual cgroup based Applications (ex:virtual machine (VM))level in both host and fabric infrastructure. Added a new function blkcg_get_fc_appid to grab the app identifier associated with a bio. Added a new function blkcg_set_fc_appid to set the app identifier in a blkcgrp associated with cgroup id Added a new config BLK_CGROUP_FC_APPID and moved the changes under this config Signed-off-by: Muneendra --- v5: Renamed the arguments appropriatley Renamed APPID_LEN to FC_APPID_LEN Moved the input validation at the begining of the function Modified the comments v4: No change v3: Renamed the functions and app_id to more specific Addressed the reference leaks in blkcg_set_app_identifier Added a new config BLK_CGROUP_FC_APPID and moved the changes under this config Added blkcg_get_fc_appid,blkcg_set_fc_appid as inline functions v2: renamed app_identifier to app_id removed the sysfs interface blkio.app_identifie under --- block/Kconfig | 9 ++++++ include/linux/blk-cgroup.h | 56 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+) diff --git a/block/Kconfig b/block/Kconfig index a2297edfdde8..1920388fb0e9 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -144,6 +144,15 @@ config BLK_CGROUP_IOLATENCY Note, this is an experimental interface and could be changed someday. +config BLK_CGROUP_FC_APPID + bool "Enable support to track FC io Traffic across cgroup applications" + depends on BLK_CGROUP=y + help + Enabling this option enables the support to track FC io traffic across + cgroup applications.It enables the Fabric and the storage targets to + identify, monitor, and handle FC traffic based on vm tags by inserting + application specific identification into the FC frame. + config BLK_CGROUP_IOCOST bool "Enable support for cost model based cgroup IO controller" depends on BLK_CGROUP=y diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h index c8fc9792ac77..216ca0d5eda7 100644 --- a/include/linux/blk-cgroup.h +++ b/include/linux/blk-cgroup.h @@ -30,6 +30,8 @@ /* Max limits for throttle policy */ #define THROTL_IOPS_MAX UINT_MAX +#define FC_APPID_LEN 129 + #ifdef CONFIG_BLK_CGROUP @@ -55,6 +57,9 @@ struct blkcg { struct blkcg_policy_data *cpd[BLKCG_MAX_POLS]; struct list_head all_blkcgs_node; +#ifdef CONFIG_BLK_CGROUP_FC_APPID + char fc_app_id[FC_APPID_LEN]; +#endif #ifdef CONFIG_CGROUP_WRITEBACK struct list_head cgwb_list; #endif @@ -660,4 +665,55 @@ static inline void blk_cgroup_bio_start(struct bio *bio) { } #endif /* CONFIG_BLOCK */ #endif /* CONFIG_BLK_CGROUP */ + +#ifdef CONFIG_BLK_CGROUP_FC_APPID +/* + * Sets the fc_app_id field associted to blkcg + * @app_id: application identifier + * @cgrp_id: cgroup id + * @app_id_len: size of application identifier + */ +static inline int blkcg_set_fc_appid(char *app_id, u64 cgrp_id, size_t app_id_len) +{ + struct cgroup *cgrp; + struct cgroup_subsys_state *css; + struct blkcg *blkcg; + int ret = 0; + + if (app_id_len > FC_APPID_LEN) + return -EINVAL; + + cgrp = cgroup_get_from_id(cgrp_id); + if (!cgrp) + return -ENOENT; + css = cgroup_get_e_css(cgrp, &io_cgrp_subsys); + if (!css) { + ret = -ENOENT; + goto out_cgrp_put; + } + blkcg = css_to_blkcg(css); + strlcpy(blkcg->fc_app_id, app_id, app_id_len); + css_put(css); +out_cgrp_put: + cgroup_put(cgrp); + return ret; +} + +/** + * blkcg_get_fc_appid - get the fc app identifier associated with a bio + * @bio: target bio + * + * On success it returns the fc_app_id on failure it returns NULL + */ +static inline char *blkcg_get_fc_appid(struct bio *bio) +{ + if (bio && bio->bi_blkg && + (bio->bi_blkg->blkcg->fc_app_id[0] != '\0')) + return bio->bi_blkg->blkcg->fc_app_id; + return NULL; +} +#else +static inline int blkcg_set_fc_appid(char *buf, u64 id, size_t len) { return -EINVAL; } +static inline char *blkcg_get_fc_appid(struct bio *bio) { return NULL; } +#endif /*CONFIG_BLK_CGROUP_FC_APPID*/ #endif /* _BLK_CGROUP_H */ -- 2.26.2 -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. 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