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net-gre-gro: Fix a bug that breaks the forwarding path 

Fixed a bug that was introduced by my GRE-GRO patch
(bf5a755f5e net-gre-gro: Add GRE
support to the GRO stack) that breaks the forwarding path
because various GSO related fields were not set. The bug will
cause on the egress path either the GSO code to fail, or a
GRE-TSO capable (NETIF_F_GSO_GRE) NICs to choke. The following
fix has been tested for both cases.

Signed-off-by: H.K. Jerry Chu <hkchu@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jerry Chu 2014-07-14 15:54:46 -07:00 committed by David S. Miller
parent b6603fe574
commit c3caf1192f
5 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/core/dev.c
View File

@ -4096,6 +4096,8 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
skb->vlan_tci = 0;
skb->dev = napi->dev;
skb->skb_iif = 0;
skb->encapsulation = 0;
skb_shinfo(skb)->gso_type = 0;
skb->truesize = SKB_TRUESIZE(skb_end_offset(skb));
napi->skb = skb;

3
net/ipv4/af_inet.c
View File

@ -1429,6 +1429,9 @@ static int inet_gro_complete(struct sk_buff *skb, int nhoff)
int proto = iph->protocol;
int err = -ENOSYS;
if (skb->encapsulation)
skb_set_inner_network_header(skb, nhoff);
csum_replace2(&iph->check, iph->tot_len, newlen);
iph->tot_len = newlen;

3
net/ipv4/gre_offload.c
View File

@ -263,6 +263,9 @@ static int gre_gro_complete(struct sk_buff *skb, int nhoff)
int err = -ENOENT;
__be16 type;
skb->encapsulation = 1;
skb_shinfo(skb)->gso_type = SKB_GSO_GRE;
type = greh->protocol;
if (greh->flags & GRE_KEY)
grehlen += GRE_HEADER_SECTION;

2
net/ipv4/tcp_offload.c
View File

@ -309,7 +309,7 @@ static int tcp4_gro_complete(struct sk_buff *skb, int thoff)
th->check = ~tcp_v4_check(skb->len - thoff, iph->saddr,
iph->daddr, 0);
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV4;
return tcp_gro_complete(skb);
}

2
net/ipv6/tcpv6_offload.c
View File

@ -73,7 +73,7 @@ static int tcp6_gro_complete(struct sk_buff *skb, int thoff)
th->check = ~tcp_v6_check(skb->len - thoff, &iph->saddr,
&iph->daddr, 0);
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6;
return tcp_gro_complete(skb);
}