From patchwork Mon Aug 3 12:49:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Durrant X-Patchwork-Id: 11697999 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 47A6C912 for ; Mon, 3 Aug 2020 12:50:47 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 23CC82064B for ; Mon, 3 Aug 2020 12:50:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=xen.org header.i=@xen.org header.b="etQRioOu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 23CC82064B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1k2ZuR-0001oz-B2; Mon, 03 Aug 2020 12:49:43 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1k2ZuP-0001oJ-KB for xen-devel@lists.xenproject.org; Mon, 03 Aug 2020 12:49:41 +0000 X-Inumbo-ID: c94bbfc8-d587-11ea-908e-bc764e2007e4 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id c94bbfc8-d587-11ea-908e-bc764e2007e4; Mon, 03 Aug 2020 12:49:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=fEecjANlWh3hBTz/ieGtixPqvrZoBJyua6jWfk3Vf10=; b=etQRioOuZx5mSrQGtdIYJdZ0Yc ZEVxz5N3UUHLW/QPuNGa/Jorna3ZqR7Hwj3mwB5CcspH7meQgXSd7H/LTsHrqsMkc6uaQkP24+Mpf E1XkZpIWjBvJCHKM06adVaIfBZLO9RqRHMkbY8UkjB8DSItessioIBxTbwYNM3JyJJLA=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1k2ZuJ-0000wp-Tp; Mon, 03 Aug 2020 12:49:35 +0000 Received: from host86-143-223-30.range86-143.btcentralplus.com ([86.143.223.30] helo=u2f063a87eabd5f.home) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1k2ZuJ-0002Mv-KR; Mon, 03 Aug 2020 12:49:35 +0000 From: Paul Durrant To: xen-devel@lists.xenproject.org Subject: [PATCH v2 1/4] tools/hotplug: add remove_from_bridge() and improve debug output Date: Mon, 3 Aug 2020 13:49:28 +0100 Message-Id: <20200803124931.2678-2-paul@xen.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200803124931.2678-1-paul@xen.org> References: <20200803124931.2678-1-paul@xen.org> MIME-Version: 1.0 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Paul Durrant , Ian Jackson , Wei Liu Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" From: Paul Durrant This patch adds a remove_from_bridge() function into xen-network-common.sh to partner with the existing add_to_bridge() function. The code in add_to_bridge() is also slightly re-arranged to avoid duplication calls of 'ip link'. Both add_to_bridge() and remove_from_bridge() will check if their bridge manipulation operations are necessary and emit a log message if they are not. NOTE: A call to remove_from_bridge() will be added by a subsequent patch. Signed-off-by: Paul Durrant --- Cc: Ian Jackson Cc: Wei Liu --- tools/hotplug/Linux/xen-network-common.sh | 37 ++++++++++++++++++----- 1 file changed, 29 insertions(+), 8 deletions(-) diff --git a/tools/hotplug/Linux/xen-network-common.sh b/tools/hotplug/Linux/xen-network-common.sh index 8dd3a62068..37e71cfa9c 100644 --- a/tools/hotplug/Linux/xen-network-common.sh +++ b/tools/hotplug/Linux/xen-network-common.sh @@ -126,19 +126,40 @@ add_to_bridge () { local bridge=$1 local dev=$2 - # Don't add $dev to $bridge if it's already on a bridge. - if [ -e "/sys/class/net/${bridge}/brif/${dev}" ]; then - ip link set dev ${dev} up || true - return - fi - if which brctl >&/dev/null; then - brctl addif ${bridge} ${dev} + # Don't add $dev to $bridge if it's already on the bridge. + if [ ! -e "/sys/class/net/${bridge}/brif/${dev}" ]; then + log debug "adding $dev to bridge $bridge" + if which brctl >&/dev/null; then + brctl addif ${bridge} ${dev} + else + ip link set ${dev} master ${bridge} + fi else - ip link set ${dev} master ${bridge} + log debug "$dev already on bridge $bridge" fi + ip link set dev ${dev} up } +remove_from_bridge () { + local bridge=$1 + local dev=$2 + + ip link set dev ${dev} down || : + + # Don't remove $dev from $bridge if it's not on the bridge. + if [ -e "/sys/class/net/${bridge}/brif/${dev}" ]; then + log debug "removing $dev from bridge $bridge" + if which brctl >&/dev/null; then + brctl delif ${bridge} ${dev} + else + ip link set ${dev} nomaster + fi + else + log debug "$dev not on bridge $bridge" + fi +} + # Usage: set_mtu bridge dev set_mtu () { local bridge=$1