virtio-net: restore VIRTIO_HDR_F_DATA_VALID on receiving

[mirror_ubuntu-bionic-kernel.git] / include / linux / virtio_net.h

diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index 56436472ccc774e43a372d3e92fb2da6a4957792..5209b5ed2a6476dfa5fe6b779f433a795f084ed7 100644 (file)
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -56,7 +56,8 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb,
 
 static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb,
                                          struct virtio_net_hdr *hdr,
-                                         bool little_endian)
+                                         bool little_endian,
+                                         bool has_data_valid)
 {
        memset(hdr, 0, sizeof(*hdr));   /* no info leak */
 
@@ -91,6 +92,9 @@ static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb,
                                skb_checksum_start_offset(skb));
                hdr->csum_offset = __cpu_to_virtio16(little_endian,
                                skb->csum_offset);
+       } else if (has_data_valid &&
+                  skb->ip_summed == CHECKSUM_UNNECESSARY) {
+               hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
        } /* else everything is zero */
 
        return 0;