From patchwork Fri Aug 19 15:15:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Toppins X-Patchwork-Id: 12948864 X-Patchwork-Delegate: kuba@kernel.org 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 B1E5CC32771 for ; Fri, 19 Aug 2022 15:16:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349699AbiHSPQB (ORCPT ); Fri, 19 Aug 2022 11:16:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59682 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349541AbiHSPPt (ORCPT ); Fri, 19 Aug 2022 11:15:49 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25EB8E0971 for ; Fri, 19 Aug 2022 08:15:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1660922147; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PhaID+X1Mqgrgk1tAzS4wrDrYfG7IsiSyF0efNhSA9o=; b=IjJW4UDFmFhxeaxmBQiuAbOCSEf9IUTTyndcT+rKnWkuZuNFyJAC9pl49eC4LUe/DlQbpW l8MSHVDrGgYOlLkHBmr2Q95F6Iu51viFRy6G3e5L6HFF4bfB9lCQri+Jfa6KJMwU5Fmn7K uDFcKhDSnXH8lgmVDJvJ/Bk2KPFvjRU= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-55-ZwCElc1OPm-XVkkuDNlEWQ-1; Fri, 19 Aug 2022 11:15:31 -0400 X-MC-Unique: ZwCElc1OPm-XVkkuDNlEWQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5819A101AA4E; Fri, 19 Aug 2022 15:15:30 +0000 (UTC) Received: from jtoppins.rdu.csb (unknown [10.22.34.189]) by smtp.corp.redhat.com (Postfix) with ESMTP id B4A62404C6E3; Fri, 19 Aug 2022 15:15:29 +0000 (UTC) From: Jonathan Toppins To: netdev@vger.kernel.org, jay.vosburgh@canonical.com Cc: liuhangbin@gmail.com, Jay Vosburgh , Veaceslav Falico , Andy Gospodarek , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Nikolay Aleksandrov , linux-kernel@vger.kernel.org Subject: [PATCH net v5 2/3] bonding: 802.3ad: fix no transmission of LACPDUs Date: Fri, 19 Aug 2022 11:15:13 -0400 Message-Id: <5fe2a41fa0c2d726a9ba92244b272b21d4bae3a4.1660919940.git.jtoppins@redhat.com> In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This is caused by the global variable ad_ticks_per_sec being zero as demonstrated by the reproducer script discussed below. This causes all timer values in __ad_timer_to_ticks to be zero, resulting in the periodic timer to never fire. To reproduce: Run the script in `tools/testing/selftests/drivers/net/bonding/bond-break-lacpdu-tx.sh` which puts bonding into a state where it never transmits LACPDUs. line 44: ip link add fbond type bond mode 4 miimon 200 \ xmit_hash_policy 1 ad_actor_sys_prio 65535 lacp_rate fast setting bond param: ad_actor_sys_prio given: params.ad_actor_system = 0 call stack: bond_option_ad_actor_sys_prio() -> bond_3ad_update_ad_actor_settings() -> set ad.system.sys_priority = bond->params.ad_actor_sys_prio -> ad.system.sys_mac_addr = bond->dev->dev_addr; because params.ad_actor_system == 0 results: ad.system.sys_mac_addr = bond->dev->dev_addr line 48: ip link set fbond address 52:54:00:3B:7C:A6 setting bond MAC addr call stack: bond->dev->dev_addr = new_mac line 52: ip link set fbond type bond ad_actor_sys_prio 65535 setting bond param: ad_actor_sys_prio given: params.ad_actor_system = 0 call stack: bond_option_ad_actor_sys_prio() -> bond_3ad_update_ad_actor_settings() -> set ad.system.sys_priority = bond->params.ad_actor_sys_prio -> ad.system.sys_mac_addr = bond->dev->dev_addr; because params.ad_actor_system == 0 results: ad.system.sys_mac_addr = bond->dev->dev_addr line 60: ip link set veth1-bond down master fbond given: params.ad_actor_system = 0 params.mode = BOND_MODE_8023AD ad.system.sys_mac_addr == bond->dev->dev_addr call stack: bond_enslave -> bond_3ad_initialize(); because first slave -> if ad.system.sys_mac_addr != bond->dev->dev_addr return results: Nothing is run in bond_3ad_initialize() because dev_addr equals sys_mac_addr leaving the global ad_ticks_per_sec zero as it is never initialized anywhere else. The if check around the contents of bond_3ad_initialize() is no longer needed due to commit 5ee14e6d336f ("bonding: 3ad: apply ad_actor settings changes immediately") which sets ad.system.sys_mac_addr if any one of the bonding parameters whos set function calls bond_3ad_update_ad_actor_settings(). This is because if ad.system.sys_mac_addr is zero it will be set to the current bond mac address, this causes the if check to never be true. Fixes: 5ee14e6d336f ("bonding: 3ad: apply ad_actor settings changes immediately") Signed-off-by: Jonathan Toppins --- Notes: v2: * split this fix from the reproducer v3: * rebased to latest net/master v4: * instead of setting ad_ticks_per_sec remove the if statement around the body of the function of bond_3ad_initialize(). v5: * no changes drivers/net/bonding/bond_3ad.c | 38 ++++++++++++++-------------------- 1 file changed, 16 insertions(+), 22 deletions(-) diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c index d7fb33c078e8..1f0120cbe9e8 100644 --- a/drivers/net/bonding/bond_3ad.c +++ b/drivers/net/bonding/bond_3ad.c @@ -2007,30 +2007,24 @@ void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) */ void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) { - /* check that the bond is not initialized yet */ - if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), - bond->dev->dev_addr)) { - - BOND_AD_INFO(bond).aggregator_identifier = 0; - - BOND_AD_INFO(bond).system.sys_priority = - bond->params.ad_actor_sys_prio; - if (is_zero_ether_addr(bond->params.ad_actor_system)) - BOND_AD_INFO(bond).system.sys_mac_addr = - *((struct mac_addr *)bond->dev->dev_addr); - else - BOND_AD_INFO(bond).system.sys_mac_addr = - *((struct mac_addr *)bond->params.ad_actor_system); + BOND_AD_INFO(bond).aggregator_identifier = 0; + BOND_AD_INFO(bond).system.sys_priority = + bond->params.ad_actor_sys_prio; + if (is_zero_ether_addr(bond->params.ad_actor_system)) + BOND_AD_INFO(bond).system.sys_mac_addr = + *((struct mac_addr *)bond->dev->dev_addr); + else + BOND_AD_INFO(bond).system.sys_mac_addr = + *((struct mac_addr *)bond->params.ad_actor_system); - /* initialize how many times this module is called in one - * second (should be about every 100ms) - */ - ad_ticks_per_sec = tick_resolution; + /* initialize how many times this module is called in one + * second (should be about every 100ms) + */ + ad_ticks_per_sec = tick_resolution; - bond_3ad_initiate_agg_selection(bond, - AD_AGGREGATOR_SELECTION_TIMER * - ad_ticks_per_sec); - } + bond_3ad_initiate_agg_selection(bond, + AD_AGGREGATOR_SELECTION_TIMER * + ad_ticks_per_sec); } /**