net: add skb functions to process remote checksum offload
This patch adds skb_remcsum_process and skb_gro_remcsum_process to
perform the appropriate adjustments to the skb when receiving
remote checksum offload.
Updated vxlan and gue to use these functions.
Tested: Ran TCP_RR and TCP_STREAM netperf for VXLAN and GUE, did
not see any change in performance.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 31bac2a..c184717 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -558,7 +558,6 @@
u32 data)
{
size_t start, offset, plen;
- __wsum delta;
if (skb->remcsum_offload)
return vh;
@@ -580,12 +579,7 @@
return NULL;
}
- delta = remcsum_adjust((void *)vh + hdrlen,
- NAPI_GRO_CB(skb)->csum, start, offset);
-
- /* Adjust skb->csum since we changed the packet */
- skb->csum = csum_add(skb->csum, delta);
- NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
+ skb_gro_remcsum_process(skb, (void *)vh + hdrlen, start, offset);
skb->remcsum_offload = 1;
@@ -1159,7 +1153,6 @@
size_t hdrlen, u32 data)
{
size_t start, offset, plen;
- __wsum delta;
if (skb->remcsum_offload) {
/* Already processed in GRO path */
@@ -1179,14 +1172,7 @@
vh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
- if (unlikely(skb->ip_summed != CHECKSUM_COMPLETE))
- __skb_checksum_complete(skb);
-
- delta = remcsum_adjust((void *)vh + hdrlen,
- skb->csum, start, offset);
-
- /* Adjust skb->csum since we changed the packet */
- skb->csum = csum_add(skb->csum, delta);
+ skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset);
return vh;
}