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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 72F34C43603 for ; Wed, 4 Dec 2019 18:14:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4559620674 for ; Wed, 4 Dec 2019 18:14:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575483274; bh=cft3eriOLCjXp/E4K4Z63jWyDhfa/m7BrWbUAAMJ7RQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=a0qhG3R2d40HAeuVNXoMm0n1oXTJK1fBgDc0Rdr7M5uJwkL38ArNzwdjYN83CFCCE lci5QPN4PKAjFdLlsLOQvDzTN8zF1yrDxwicL+QeCPtSfJH/9tn6LgnE8wlmM+NQSi XPccpB1yfztqPuQaqkSS+TJ96lpzL1k8XHdEiAKI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731933AbfLDSOc (ORCPT ); Wed, 4 Dec 2019 13:14:32 -0500 Received: from mail.kernel.org ([198.145.29.99]:43874 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731919AbfLDSOb (ORCPT ); Wed, 4 Dec 2019 13:14:31 -0500 Received: from localhost (unknown [217.68.49.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0B32B20674; Wed, 4 Dec 2019 18:14:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575483270; bh=cft3eriOLCjXp/E4K4Z63jWyDhfa/m7BrWbUAAMJ7RQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E7e5QQZ7Sl41Vj+H1Sv5It2fBsPmY4ExpGKJ0KGTJVjJjjRWJ5YfFaTEmVfAEtijs jXyu3KYtNtifBEQ0e8BQLJOEMJcRU0wZq8dM3bSzISZzwroU9y3R2f7Ew6yFLkYaWV kvBDEnv+pQKtYH0QAoRNaEL2RtL2+Xc5dwoDm7v0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dust Li , Tony Lu , Cong Wang , "David S. Miller" Subject: [PATCH 4.9 121/125] net: sched: fix `tc -s class show` no bstats on class with nolock subqueues Date: Wed, 4 Dec 2019 18:57:06 +0100 Message-Id: <20191204175326.682613206@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191204175308.377746305@linuxfoundation.org> References: <20191204175308.377746305@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dust Li [ Upstream commit 14e54ab9143fa60794d13ea0a66c792a2046a8f3 ] When a classful qdisc's child qdisc has set the flag TCQ_F_CPUSTATS (pfifo_fast for example), the child qdisc's cpu_bstats should be passed to gnet_stats_copy_basic(), but many classful qdisc didn't do that. As a result, `tc -s class show dev DEV` always return 0 for bytes and packets in this case. Pass the child qdisc's cpu_bstats to gnet_stats_copy_basic() to fix this issue. The qstats also has this problem, but it has been fixed in 5dd431b6b9 ("net: sched: introduce and use qstats read...") and bstats still remains buggy. Fixes: 22e0f8b9322c ("net: sched: make bstats per cpu and estimator RCU safe") Signed-off-by: Dust Li Signed-off-by: Tony Lu Acked-by: Cong Wang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/sched/sch_mq.c | 3 ++- net/sched/sch_mqprio.c | 4 ++-- net/sched/sch_multiq.c | 2 +- net/sched/sch_prio.c | 2 +- 4 files changed, 6 insertions(+), 5 deletions(-) --- a/net/sched/sch_mq.c +++ b/net/sched/sch_mq.c @@ -195,7 +195,8 @@ static int mq_dump_class_stats(struct Qd struct netdev_queue *dev_queue = mq_queue_get(sch, cl); sch = dev_queue->qdisc_sleeping; - if (gnet_stats_copy_basic(&sch->running, d, NULL, &sch->bstats) < 0 || + if (gnet_stats_copy_basic(&sch->running, d, sch->cpu_bstats, + &sch->bstats) < 0 || gnet_stats_copy_queue(d, NULL, &sch->qstats, sch->q.qlen) < 0) return -1; return 0; --- a/net/sched/sch_mqprio.c +++ b/net/sched/sch_mqprio.c @@ -362,8 +362,8 @@ static int mqprio_dump_class_stats(struc struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl); sch = dev_queue->qdisc_sleeping; - if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), - d, NULL, &sch->bstats) < 0 || + if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), d, + sch->cpu_bstats, &sch->bstats) < 0 || gnet_stats_copy_queue(d, NULL, &sch->qstats, sch->q.qlen) < 0) return -1; --- a/net/sched/sch_multiq.c +++ b/net/sched/sch_multiq.c @@ -332,7 +332,7 @@ static int multiq_dump_class_stats(struc cl_q = q->queues[cl - 1]; if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), - d, NULL, &cl_q->bstats) < 0 || + d, cl_q->cpu_bstats, &cl_q->bstats) < 0 || gnet_stats_copy_queue(d, NULL, &cl_q->qstats, cl_q->q.qlen) < 0) return -1; --- a/net/sched/sch_prio.c +++ b/net/sched/sch_prio.c @@ -286,7 +286,7 @@ static int prio_dump_class_stats(struct cl_q = q->queues[cl - 1]; if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch), - d, NULL, &cl_q->bstats) < 0 || + d, cl_q->cpu_bstats, &cl_q->bstats) < 0 || gnet_stats_copy_queue(d, NULL, &cl_q->qstats, cl_q->q.qlen) < 0) return -1;