From patchwork Sun Oct 11 19:36:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiner Kallweit X-Patchwork-Id: 11831075 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 99593109B for ; Sun, 11 Oct 2020 19:44:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C6BD2145D for ; Sun, 11 Oct 2020 19:44:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="S7Yhz7FN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726616AbgJKTo3 (ORCPT ); Sun, 11 Oct 2020 15:44:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726363AbgJKTo3 (ORCPT ); Sun, 11 Oct 2020 15:44:29 -0400 Received: from mail-ej1-x644.google.com (mail-ej1-x644.google.com [IPv6:2a00:1450:4864:20::644]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9799EC0613CE; Sun, 11 Oct 2020 12:44:28 -0700 (PDT) Received: by mail-ej1-x644.google.com with SMTP id e22so20353496ejr.4; Sun, 11 Oct 2020 12:44:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:references:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=11y0pgG7aEVp4MN5bK5igJeBve2DHauuUJfvXQcU/cQ=; b=S7Yhz7FN4RrMaWZm062rjZtizkHtS2nV//ChDYOYkWaZc2/x3cEdl0rYtGoalmayEv l6AXRWI4xAJDVQC++R7i4AUWeE9nt3IDlOsLJfhNz/n0nROqitAsJb1eMMW0Yhfeyapq qMxH65BqWerBKZ4RgZ9KNhyYwXdUKGtBcQJnmk0ChQ/rARn80X/hhBRogAcNMNwiCk1R WCL9mXtmyKYZletsrxv5wKAuFEwNw0sfn4YhHnyFiqudQ0WPzB9n0wZfD0dXd67mpvtu OQJX97FsIVmi7NonufBQle/Iu1kSzfxG+Pr4jFLedyLWzd079oE6JpWXdDobDiqzrc4Z L9qQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=11y0pgG7aEVp4MN5bK5igJeBve2DHauuUJfvXQcU/cQ=; b=muCG6Eff6aIR1lJBy1wKXOJsBf7Z0xG6xXzwjCCy29q4pZqU/1nmvDl8v+z6p8Xpoy wiReaQJlHxJ0RJ8ca7UbldOuuP3MOS6cjDWimterrk3q/tVWwJPH9HRY5XLS6GRsXwj8 xF9AkrhYaq0CYAULN2NQ8Y994Gy9pC/t0Jxlh+O9UFHELR2wcPjTs6+Kouio33ldESYg fVF2GpAW5xEPZekOW8KWP9If4gArlFT7OJ/H1bTL7EjfNd5S86PN/5W4PDXuyTyK8Nl6 bt5D9QIslGthAB5Qhrs1MMkrFSa4KChsZpEAQedH+OlBwFUyWhb6h5faLRGpX16xKTzk Bnag== X-Gm-Message-State: AOAM532wS7Rrh6lqRpCJuntmJQaWqaUr9yq3rUKcC7mFDMfMJ1SbrCDq aP5p086vOsT9Ohwq10Pfp6Y= X-Google-Smtp-Source: ABdhPJwVvpcAwXtIRgiHnHwS6RDkPJ1F5KHG+smtvSF9qxcZiwxZuqYBL0otDnZ7nDsvJi4e8+FCrw== X-Received: by 2002:a17:906:6887:: with SMTP id n7mr24494904ejr.288.1602445467117; Sun, 11 Oct 2020 12:44:27 -0700 (PDT) Received: from ?IPv6:2003:ea:8f00:6a00:51b7:bf4f:604:7d3d? (p200300ea8f006a0051b7bf4f06047d3d.dip0.t-ipconnect.de. [2003:ea:8f00:6a00:51b7:bf4f:604:7d3d]) by smtp.googlemail.com with ESMTPSA id y25sm9655319edr.7.2020.10.11.12.44.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 11 Oct 2020 12:44:26 -0700 (PDT) Subject: [PATCH net-next 01/12] net: core: add function dev_fetch_sw_netstats for fetching pcpu_sw_netstats From: Heiner Kallweit To: David Miller , Jakub Kicinski , =?utf-8?q?Bj=C3=B8rn_Mork?= , Oliver Neukum , Igor Mitsyanko , Sergey Matyukevich , Kalle Valo , Roopa Prabhu , Nikolay Aleksandrov , Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , Alexey Kuznetsov , Hideaki YOSHIFUJI , Johannes Berg , Pravin B Shelar , Steffen Klassert , Herbert Xu Cc: "netdev@vger.kernel.org" , linux-rdma@vger.kernel.org, Linux USB Mailing List , linux-wireless , bridge@lists.linux-foundation.org References: Message-ID: <5bb71143-0dac-c413-7e97-50eed8a57862@gmail.com> Date: Sun, 11 Oct 2020 21:36:43 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org In several places the same code is used to populate rtnl_link_stats64 fields with data from pcpu_sw_netstats. Therefore factor out this code to a new function dev_fetch_sw_netstats(). Signed-off-by: Heiner Kallweit --- include/linux/netdevice.h | 2 ++ net/core/dev.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index a0df43b13..ca4736349 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -4495,6 +4495,8 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, struct rtnl_link_stats64 *storage); void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, const struct net_device_stats *netdev_stats); +void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s, + struct pcpu_sw_netstats __percpu *netstats); extern int netdev_max_backlog; extern int netdev_tstamp_prequeue; diff --git a/net/core/dev.c b/net/core/dev.c index 7d18560b2..ba91bf16b 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -10323,6 +10323,42 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, } EXPORT_SYMBOL(dev_get_stats); +/** + * dev_fetch_sw_netstats - get per-cpu network device statistics + * @s: place to store stats + * @netstats: per-cpu network stats to read from + * + * Read per-cpu network statistics and populate the related fields in s. + */ +void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s, + struct pcpu_sw_netstats __percpu *netstats) +{ + int cpu; + + if (IS_ERR_OR_NULL(netstats)) + return; + + for_each_possible_cpu(cpu) { + struct pcpu_sw_netstats *stats, tmp; + unsigned int start; + + stats = per_cpu_ptr(netstats, cpu); + do { + start = u64_stats_fetch_begin_irq(&stats->syncp); + tmp.rx_packets = stats->rx_packets; + tmp.rx_bytes = stats->rx_bytes; + tmp.tx_packets = stats->tx_packets; + tmp.tx_bytes = stats->tx_bytes; + } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); + + s->rx_packets += tmp.rx_packets; + s->rx_bytes += tmp.rx_bytes; + s->tx_packets += tmp.tx_packets; + s->tx_bytes += tmp.tx_bytes; + } +} +EXPORT_SYMBOL(dev_fetch_sw_netstats); + struct netdev_queue *dev_ingress_queue_create(struct net_device *dev) { struct netdev_queue *queue = dev_ingress_queue(dev);