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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 0BB6DC83000 for ; Wed, 29 Apr 2020 18:47:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EAACB2064C for ; Wed, 29 Apr 2020 18:47:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726974AbgD2Sr6 (ORCPT ); Wed, 29 Apr 2020 14:47:58 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:8328 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726423AbgD2Sr5 (ORCPT ); Wed, 29 Apr 2020 14:47:57 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 03TI4TjB106070; Wed, 29 Apr 2020 14:47:51 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 30mhq9y7tp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Apr 2020 14:47:50 -0400 Received: from m0098394.ppops.net (m0098394.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 03TIgeJd036414; Wed, 29 Apr 2020 14:47:49 -0400 Received: from ppma04wdc.us.ibm.com (1a.90.2fa9.ip4.static.sl-reverse.com [169.47.144.26]) by mx0a-001b2d01.pphosted.com with ESMTP id 30mhq9y7t5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Apr 2020 14:47:49 -0400 Received: from pps.filterd (ppma04wdc.us.ibm.com [127.0.0.1]) by ppma04wdc.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 03TIkkTq013599; Wed, 29 Apr 2020 18:47:48 GMT Received: from b03cxnp08025.gho.boulder.ibm.com (b03cxnp08025.gho.boulder.ibm.com [9.17.130.17]) by ppma04wdc.us.ibm.com with ESMTP id 30mcu771hv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Apr 2020 18:47:48 +0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 03TIllcQ27263458 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 29 Apr 2020 18:47:47 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 901FFBE04F; Wed, 29 Apr 2020 18:47:47 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 70C69BE054; Wed, 29 Apr 2020 18:47:46 +0000 (GMT) Received: from oc7186267434.ibm.com (unknown [9.80.239.215]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 29 Apr 2020 18:47:46 +0000 (GMT) Subject: Re: [PATCH] net/bonding: Do not transition down slave after speed/duplex check To: Jay Vosburgh Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Veaceslav Falico , Andy Gospodarek References: <1588183759-7659-1-git-send-email-tlfalcon@linux.ibm.com> <29484.1588185503@famine> From: Thomas Falcon Message-ID: <345ca135-6432-a4a0-e681-4822b3575bae@linux.ibm.com> Date: Wed, 29 Apr 2020 13:47:45 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <29484.1588185503@famine> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-29_09:2020-04-29,2020-04-29 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 phishscore=0 clxscore=1011 adultscore=0 suspectscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004290138 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 4/29/20 1:38 PM, Jay Vosburgh wrote: > Thomas Falcon wrote: > >> The following behavior has been observed when testing logical partition >> migration of LACP-bonded VNIC devices in a PowerVM pseries environment. >> >> 1. When performing the migration, the bond master detects that a slave has >> lost its link, deactivates the LACP port, and sets the port's >> is_enabled flag to false. >> 2. The slave device then updates it's carrier state to off while it resets >> itself. This update triggers a NETDEV_CHANGE notification, which performs >> a speed and duplex update. The device does not return a valid speed >> and duplex, so the master sets the slave link state to BOND_LINK_FAIL. >> 3. When the slave VNIC device(s) are active again, some operations, such >> as setting the port's is_enabled flag, are not performed when transitioning >> the link state back to BOND_LINK_UP from BOND_LINK_FAIL, though the state >> prior to the speed check was BOND_LINK_DOWN. > Just to make sure I'm understanding correctly, in regards to > "the state prior to the speed check was BOND_LINK_DOWN," do you mean > that during step 1, the slave link is set to BOND_LINK_DOWN, and then in > step 2 changed from _DOWN to _FAIL? Yes, that's what I meant, thanks. > >> Affected devices are therefore not utilized in the aggregation though they >> are operational. The simplest way to fix this seems to be to restrict the >> link state change to devices that are currently up and running. > This sounds similar to an issue from last fall; can you confirm > that you're running with a kernel that includes: > > 1899bb325149 bonding: fix state transition issue in link monitoring > > -J > I think so, but I will confirm ASAP. Tom >> CC: Jay Vosburgh >> CC: Veaceslav Falico >> CC: Andy Gospodarek >> Signed-off-by: Thomas Falcon >> --- >> drivers/net/bonding/bond_main.c | 3 ++- >> 1 file changed, 2 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c >> index 2e70e43c5df5..d840da7cd379 100644 >> --- a/drivers/net/bonding/bond_main.c >> +++ b/drivers/net/bonding/bond_main.c >> @@ -3175,7 +3175,8 @@ static int bond_slave_netdev_event(unsigned long event, >> * speeds/duplex are available. >> */ >> if (bond_update_speed_duplex(slave) && >> - BOND_MODE(bond) == BOND_MODE_8023AD) { >> + BOND_MODE(bond) == BOND_MODE_8023AD && >> + slave->link == BOND_LINK_UP) { >> if (slave->last_link_up) >> slave->link = BOND_LINK_FAIL; >> else >> -- >> 2.18.2 >> > --- > -Jay Vosburgh, jay.vosburgh@canonical.com