[PATCH 6/6] packet: use common code for virtio_net_hdr and skb GSO conversion

[Mike Rapoport]

Replace open coded conversion between virtio_net_hdr to skb GSO info with
virtio_net_hdr_from_skb

Signed-off-by: Mike Rapoport <r...@linux.vnet.ibm.com>
---
 net/packet/af_packet.c | 36 ++----------------------------------
 1 file changed, 2 insertions(+), 34 deletions(-)

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 4040eb9..ec35aa9 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1978,40 +1978,8 @@ static int __packet_rcv_vnet(const struct sk_buff *skb,
 {
        *vnet_hdr = (const struct virtio_net_hdr) { 0 };
 
-       if (skb_is_gso(skb)) {
-               struct skb_shared_info *sinfo = skb_shinfo(skb);
-
-               /* This is a hint as to how much should be linear. */
-               vnet_hdr->hdr_len =
-                       __cpu_to_virtio16(vio_le(), skb_headlen(skb));
-               vnet_hdr->gso_size =
-                       __cpu_to_virtio16(vio_le(), sinfo->gso_size);
-
-               if (sinfo->gso_type & SKB_GSO_TCPV4)
-                       vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
-               else if (sinfo->gso_type & SKB_GSO_TCPV6)
-                       vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
-               else if (sinfo->gso_type & SKB_GSO_UDP)
-                       vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP;
-               else if (sinfo->gso_type & SKB_GSO_FCOE)
-                       return -EINVAL;
-               else
-                       BUG();
-
-               if (sinfo->gso_type & SKB_GSO_TCP_ECN)
-                       vnet_hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN;
-       } else
-               vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE;
-
-       if (skb->ip_summed == CHECKSUM_PARTIAL) {
-               vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
-               vnet_hdr->csum_start = __cpu_to_virtio16(vio_le(),
-                                 skb_checksum_start_offset(skb));
-               vnet_hdr->csum_offset = __cpu_to_virtio16(vio_le(),
-                                                skb->csum_offset);
-       } else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
-               vnet_hdr->flags = VIRTIO_NET_HDR_F_DATA_VALID;
-       } /* else everything is zero */
+       if (virtio_net_hdr_from_skb(skb, vnet_hdr, vio_le()))
+               BUG();
 
        return 0;
 }
-- 
1.9.1