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udp: pass udp_offload struct to UDP gro callbacks

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This patch introduces udp_offload_callbacks which has the same
GRO functions (but not a GSO function) as offload_callbacks,
except there is an argument to a udp_offload struct passed to
gro_receive and gro_complete functions. This additional argument
can be used to retrieve the per port structure of the encapsulation
for use in gro processing (mostly by doing container_of on the
structure).

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert
2015-01-12 17:00:37 -08:00
committed by David S. Miller
parent d823ab68fb
commit a2b12f3c7a
5 changed files with 35 additions and 12 deletions
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7
net/ipv4/udp_offload.c
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@@ -339,7 +339,8 @@ unflush:
skb_gro_pull(skb, sizeof(struct udphdr)); /* pull encapsulating udp header */
skb_gro_postpull_rcsum(skb, uh, sizeof(struct udphdr));
NAPI_GRO_CB(skb)->proto = uo_priv->offload->ipproto;
pp = uo_priv->offload->callbacks.gro_receive(head, skb);
pp = uo_priv->offload->callbacks.gro_receive(head, skb,
uo_priv->offload);
out_unlock:
rcu_read_unlock();
@@ -395,7 +396,9 @@ int udp_gro_complete(struct sk_buff *skb, int nhoff)
if (uo_priv != NULL) {
NAPI_GRO_CB(skb)->proto = uo_priv->offload->ipproto;
err = uo_priv->offload->callbacks.gro_complete(skb, nhoff + sizeof(struct udphdr));
err = uo_priv->offload->callbacks.gro_complete(skb,
nhoff + sizeof(struct udphdr),
uo_priv->offload);
}
rcu_read_unlock();