From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aaron Conole Subject: [RFC v3 -net 1/2] virtio: Start feature MTU support Date: Fri, 1 Apr 2016 15:32:15 -0400 Message-ID: <1459539136-13948-2-git-send-email-aconole@redhat.com> References: <1459539136-13948-1-git-send-email-aconole@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org, "Michael S. Tsirkin" , virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Paolo Abeni , Sergei Shtylyov , Pankaj Gupta Return-path: In-Reply-To: <1459539136-13948-1-git-send-email-aconole@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Id: netdev.vger.kernel.org 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 --- v2,v3: * No change 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)); /* -- 2.5.5