Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752313AbcCJO2q (ORCPT ); Thu, 10 Mar 2016 09:28:46 -0500 Received: from mx1.redhat.com ([209.132.183.28]:44901 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752103AbcCJO2Q (ORCPT ); Thu, 10 Mar 2016 09:28:16 -0500 From: Aaron Conole To: netdev@vger.kernel.org, "Michael S. Tsirkin" , virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [RFC -next 1/2] virtio: Start the advised MTU feature support Date: Thu, 10 Mar 2016 09:28:11 -0500 Message-Id: <1457620092-24170-2-git-send-email-aconole@redhat.com> In-Reply-To: <1457620092-24170-1-git-send-email-aconole@redhat.com> References: <1457620092-24170-1-git-send-email-aconole@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1040 Lines: 32 This commit adds the feature bit and associated mtu device entry for the virtio network device. Future commits will make use of these bits to support negotiated MTU. Signed-off-by: Aaron Conole --- include/uapi/linux/virtio_net.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h index ec32293..41a6a01 100644 --- a/include/uapi/linux/virtio_net.h +++ b/include/uapi/linux/virtio_net.h @@ -55,6 +55,7 @@ #define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow * Steering */ #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ +#define VIRTIO_NET_F_MTU 25 /* Device supports Default MTU Negotiation */ #ifndef VIRTIO_NET_NO_LEGACY #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */ @@ -73,6 +74,8 @@ struct virtio_net_config { * Legal values are between 1 and 0x8000 */ __u16 max_virtqueue_pairs; + /* Default maximum transmit unit advice */ + __u16 mtu; } __attribute__((packed)); /* -- 2.5.0