diff options
Diffstat (limited to 'net/ipv4/gre_offload.c')
| -rw-r--r-- | net/ipv4/gre_offload.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c index 10bc49bde9a1..1121a9d5fed9 100644 --- a/net/ipv4/gre_offload.c +++ b/net/ipv4/gre_offload.c @@ -15,10 +15,10 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb, netdev_features_t features) { int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb); + bool need_csum, offload_csum, gso_partial, need_ipsec; struct sk_buff *segs = ERR_PTR(-EINVAL); u16 mac_offset = skb->mac_header; __be16 protocol = skb->protocol; - bool need_csum, gso_partial; u16 mac_len = skb->mac_len; int gre_offset, outer_hlen; @@ -47,6 +47,11 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb, if (need_csum) features &= ~NETIF_F_SCTP_CRC; + need_ipsec = skb_dst(skb) && dst_xfrm(skb_dst(skb)); + /* Try to offload checksum if possible */ + offload_csum = !!(need_csum && !need_ipsec && + (skb->dev->features & NETIF_F_HW_CSUM)); + /* segment inner packet. */ segs = skb_mac_gso_segment(skb, features); if (IS_ERR_OR_NULL(segs)) { @@ -100,7 +105,13 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb, } *(pcsum + 1) = 0; - *pcsum = gso_make_checksum(skb, 0); + if (skb->encapsulation || !offload_csum) { + *pcsum = gso_make_checksum(skb, 0); + } else { + skb->ip_summed = CHECKSUM_PARTIAL; + skb->csum_start = skb_transport_header(skb) - skb->head; + skb->csum_offset = sizeof(*greh); + } } while ((skb = skb->next)); out: return segs; |