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gre: Add support for checksum unnecessary conversions

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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: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2014-08-31 15:12:44 -07:00 • committed by David S. Miller
parent 2abb7cdc0d
commit 884d338c04
2 changed files with 10 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
net/ipv4/gre_demux.c
View file

@ -125,6 +125,10 @@ static int parse_gre_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
*csum_err = true; *csum_err = true;
return -EINVAL; return -EINVAL;
} }
skb_checksum_try_convert(skb, IPPROTO_GRE, 0,
null_compute_pseudo);
options++; options++;
} }

8
net/ipv4/gre_offload.c
View file

@ -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. */ /* 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) {
skb_gro_checksum_simple_validate(skb)) if (skb_gro_checksum_simple_validate(skb))
goto out_unlock; goto out_unlock;
skb_gro_checksum_try_convert(skb, IPPROTO_GRE, 0,
null_compute_pseudo);
}
flush = 0; flush = 0;
for (p = *head; p; p = p->next) { for (p = *head; p; p = p->next) {