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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: 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
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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;
return -EINVAL;
}
skb_checksum_try_convert(skb, IPPROTO_GRE, 0,
null_compute_pseudo);
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. */
if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush &&
skb_gro_checksum_simple_validate(skb))
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,
null_compute_pseudo);
}
flush = 0;
for (p = *head; p; p = p->next) {