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udp: use indirect call wrappers for GRO socket lookup 

This avoids another indirect call for UDP GRO. Again, the test
for the IPv6 variant is performed first.

v1 -> v2:
 - adapted to INDIRECT_CALL_ changes

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2018-12-14 11:52:00 +01:00 committed by David S. Miller
parent 028e0a4766
commit 4f24ed77de
1 changed files with 6 additions and 2 deletions
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8
net/ipv4/udp_offload.c
View File

@ -392,6 +392,8 @@ static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
return NULL;
}
INDIRECT_CALLABLE_DECLARE(struct sock *udp6_lib_lookup_skb(struct sk_buff *skb,
__be16 sport, __be16 dport));
struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb,
struct udphdr *uh, udp_lookup_t lookup)
{
@ -403,7 +405,8 @@ struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb,
struct sock *sk;
rcu_read_lock();
sk = (*lookup)(skb, uh->source, uh->dest);
sk = INDIRECT_CALL_INET(lookup, udp6_lib_lookup_skb,
udp4_lib_lookup_skb, skb, uh->source, uh->dest);
if (!sk)
goto out_unlock;
@ -503,7 +506,8 @@ int udp_gro_complete(struct sk_buff *skb, int nhoff,
uh->len = newlen;
rcu_read_lock();
sk = (*lookup)(skb, uh->source, uh->dest);
sk = INDIRECT_CALL_INET(lookup, udp6_lib_lookup_skb,
udp4_lib_lookup_skb, skb, uh->source, uh->dest);
if (sk && udp_sk(sk)->gro_enabled) {
err = udp_gro_complete_segment(skb);
} else if (sk && udp_sk(sk)->gro_complete) {