1 files changed, 3 insertions, 0 deletions

diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h
index ec32293a00db..1ab4ea6ec847 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     /* Initial MTU advice */
 
 #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));
 
 /*