From patchwork Thu Apr 5 21:08:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Samudrala, Sridhar" X-Patchwork-Id: 895538 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=intel.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40HFmW4gbbz9s1B for ; Fri, 6 Apr 2018 07:08:27 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751530AbeDEVI0 (ORCPT ); Thu, 5 Apr 2018 17:08:26 -0400 Received: from mga04.intel.com ([192.55.52.120]:19399 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751404AbeDEVIY (ORCPT ); Thu, 5 Apr 2018 17:08:24 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Apr 2018 14:08:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,412,1517904000"; d="scan'208";a="29876009" Received: from arch-p28.jf.intel.com ([10.166.187.31]) by fmsmga007.fm.intel.com with ESMTP; 05 Apr 2018 14:08:23 -0700 From: Sridhar Samudrala To: mst@redhat.com, stephen@networkplumber.org, davem@davemloft.net, netdev@vger.kernel.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org, jesse.brandeburg@intel.com, alexander.h.duyck@intel.com, kubakici@wp.pl, sridhar.samudrala@intel.com, jasowang@redhat.com, loseweigh@gmail.com, jiri@resnulli.us Subject: [RFC PATCH net-next v5 1/4] virtio_net: Introduce VIRTIO_NET_F_BACKUP feature bit Date: Thu, 5 Apr 2018 14:08:20 -0700 Message-Id: <1522962503-3963-2-git-send-email-sridhar.samudrala@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1522962503-3963-1-git-send-email-sridhar.samudrala@intel.com> References: <1522962503-3963-1-git-send-email-sridhar.samudrala@intel.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This feature bit can be used by hypervisor to indicate virtio_net device to act as a backup for another device with the same MAC address. VIRTIO_NET_F_BACKUP is defined as bit 62 as it is a device feature bit. Signed-off-by: Sridhar Samudrala --- drivers/net/virtio_net.c | 2 +- include/uapi/linux/virtio_net.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 7b187ec7411e..befb5944f3fd 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2962,7 +2962,7 @@ static struct virtio_device_id id_table[] = { VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ, \ VIRTIO_NET_F_CTRL_MAC_ADDR, \ VIRTIO_NET_F_MTU, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, \ - VIRTIO_NET_F_SPEED_DUPLEX + VIRTIO_NET_F_SPEED_DUPLEX, VIRTIO_NET_F_BACKUP static unsigned int features[] = { VIRTNET_FEATURES, diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h index 5de6ed37695b..c7c35fd1a5ed 100644 --- a/include/uapi/linux/virtio_net.h +++ b/include/uapi/linux/virtio_net.h @@ -57,6 +57,9 @@ * Steering */ #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ +#define VIRTIO_NET_F_BACKUP 62 /* Act as backup for another device + * with the same MAC. + */ #define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */ #ifndef VIRTIO_NET_NO_LEGACY