Commit 884d338c authored by Tom Herbert's avatar Tom Herbert Committed by David S. Miller
Browse files

gre: Add support for checksum unnecessary conversions

Call skb_checksum_try_convert and skb_gro_checksum_try_convert
after checksum is found present and validated in the GRE header
for normal and GRO paths respectively.

In GRO path, call skb_gro_checksum_try_convert
Signed-off-by: default avatarTom Herbert <>
Signed-off-by: default avatarDavid S. Miller <>
parent 2abb7cdc
......@@ -125,6 +125,10 @@ static int parse_gre_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
*csum_err = true;
return -EINVAL;
skb_checksum_try_convert(skb, IPPROTO_GRE, 0,
......@@ -172,10 +172,14 @@ static struct sk_buff **gre_gro_receive(struct sk_buff **head,
/* Don't bother verifying checksum if we're going to flush anyway. */
if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush &&
if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush) {
if (skb_gro_checksum_simple_validate(skb))
goto out_unlock;
skb_gro_checksum_try_convert(skb, IPPROTO_GRE, 0,
flush = 0;
for (p = *head; p; p = p->next) {
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