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gre: Use inner_proto to obtain inner header protocol 

Instead of parsing headers to determine the inner protocol we can just pull
the value from inner_proto.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2016-02-05 15:28:08 -08:00 committed by David S. Miller
parent 2e598af713
commit 3872035241
1 changed files with 2 additions and 4 deletions
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6
net/ipv4/gre_offload.c
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@ -20,7 +20,6 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
{
int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb);
struct sk_buff *segs = ERR_PTR(-EINVAL);
struct gre_base_hdr *greh;
u16 mac_offset = skb->mac_header;
__be16 protocol = skb->protocol;
u16 mac_len = skb->mac_len;
@ -48,15 +47,13 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
if (unlikely(!pskb_may_pull(skb, tnl_hlen)))
goto out;
greh = (struct gre_base_hdr *)skb_transport_header(skb);
/* setup inner skb. */
skb->protocol = greh->protocol;
skb->encapsulation = 0;
__skb_pull(skb, tnl_hlen);
skb_reset_mac_header(skb);
skb_set_network_header(skb, skb_inner_network_offset(skb));
skb->mac_len = skb_inner_network_offset(skb);
skb->protocol = skb->inner_protocol;
need_csum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_GRE_CSUM);
skb->encap_hdr_csum = need_csum;
@ -75,6 +72,7 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
gre_offset = outer_hlen - tnl_hlen;
skb = segs;
do {
struct gre_base_hdr *greh;
__be32 *pcsum;
skb_reset_inner_headers(skb);