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-rw-r--r--hw/virtio-net.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/virtio-net.h b/hw/virtio-net.h
index 44687414c9..36aa463812 100644
--- a/hw/virtio-net.h
+++ b/hw/virtio-net.h
@@ -79,6 +79,7 @@ struct virtio_net_config
 struct virtio_net_hdr
 {
 #define VIRTIO_NET_HDR_F_NEEDS_CSUM     1       // Use csum_start, csum_offset
+#define VIRTIO_NET_HDR_F_DATA_VALID	2	// Csum is valid
     uint8_t flags;
 #define VIRTIO_NET_HDR_GSO_NONE         0       // Not a GSO frame
 #define VIRTIO_NET_HDR_GSO_TCPV4        1       // GSO frame, IPv4 TCP (TSO)