@@ -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));
/*
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 <aconole@bytheb.org> --- v2,v3: * No change include/uapi/linux/virtio_net.h | 3 +++ 1 file changed, 3 insertions(+)