From patchwork Wed Jul 28 03:35:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "zhudi (J)" X-Patchwork-Id: 12404909 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 X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, 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 D816EC4338F for ; Wed, 28 Jul 2021 03:35:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA8D860F9C for ; Wed, 28 Jul 2021 03:35:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233609AbhG1Df1 (ORCPT ); Tue, 27 Jul 2021 23:35:27 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:7881 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233481AbhG1Df0 (ORCPT ); Tue, 27 Jul 2021 23:35:26 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4GZK2f6XkJz818G; Wed, 28 Jul 2021 11:31:38 +0800 (CST) Received: from dggpemm500021.china.huawei.com (7.185.36.109) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 28 Jul 2021 11:35:11 +0800 Received: from DESKTOP-9883QJJ.china.huawei.com (10.136.114.155) by dggpemm500021.china.huawei.com (7.185.36.109) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 28 Jul 2021 11:35:10 +0800 From: zhudi To: , , , CC: , , Subject: [PATCH] bonding: Avoid adding slave devices to inactive bonding Date: Wed, 28 Jul 2021 11:35:05 +0800 Message-ID: <20210728033505.1627-1-zhudi21@huawei.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-Originating-IP: [10.136.114.155] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500021.china.huawei.com (7.185.36.109) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org We need to refuse to add slave devices to the bonding which does not set IFF_UP flag, otherwise some problems will be caused(such as bond_set_carrier() will not sync carrier state to upper net device). The ifenslave command can prevent such use case, but through the sysfs interface, slave devices can still be added regardless of whether the bonding is set with IFF_UP flag or not. So we introduce a new BOND_OPTFLAG_IFUP flag to avoid adding slave devices to inactive bonding. Signed-off-by: zhudi --- drivers/net/bonding/bond_options.c | 4 +++- include/net/bond_options.h | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c index 0cf25de6f46d..6d2f44b3528d 100644 --- a/drivers/net/bonding/bond_options.c +++ b/drivers/net/bonding/bond_options.c @@ -387,7 +387,7 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = { .id = BOND_OPT_SLAVES, .name = "slaves", .desc = "Slave membership management", - .flags = BOND_OPTFLAG_RAWVAL, + .flags = BOND_OPTFLAG_RAWVAL | BOND_OPTFLAG_IFUP, .set = bond_option_slaves_set }, [BOND_OPT_TLB_DYNAMIC_LB] = { @@ -583,6 +583,8 @@ static int bond_opt_check_deps(struct bonding *bond, return -ENOTEMPTY; if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) return -EBUSY; + if ((opt->flags & BOND_OPTFLAG_IFUP) && !(bond->dev->flags & IFF_UP)) + return -EPERM; return 0; } diff --git a/include/net/bond_options.h b/include/net/bond_options.h index 9d382f2f0bc5..742f5cc81adf 100644 --- a/include/net/bond_options.h +++ b/include/net/bond_options.h @@ -15,11 +15,13 @@ * BOND_OPTFLAG_NOSLAVES - check if the bond device is empty before setting * BOND_OPTFLAG_IFDOWN - check if the bond device is down before setting * BOND_OPTFLAG_RAWVAL - the option parses the value itself + * BOND_OPTFLAG_IFUP - check if the bond device is up before setting */ enum { BOND_OPTFLAG_NOSLAVES = BIT(0), BOND_OPTFLAG_IFDOWN = BIT(1), - BOND_OPTFLAG_RAWVAL = BIT(2) + BOND_OPTFLAG_RAWVAL = BIT(2), + BOND_OPTFLAG_IFUP = BIT(3) }; /* Value type flags: