From f2e9de210d50187d206989e60bc5a99c2b692209 Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Fri, 5 Oct 2018 11:31:40 -0400 Subject: udp: gro behind static key Avoid the socket lookup cost in udp_gro_receive if no socket has a udp tunnel callback configured. udp_sk(sk)->gro_receive requires a registration with setup_udp_tunnel_sock, which enables the static key. Signed-off-by: Willem de Bruijn Acked-by: Paolo Abeni Signed-off-by: David S. Miller --- net/ipv4/udp_offload.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv4/udp_offload.c') diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c index 0c0522b79b43..802f2bc00d69 100644 --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -405,7 +405,7 @@ static struct sk_buff *udp4_gro_receive(struct list_head *head, { struct udphdr *uh = udp_gro_udphdr(skb); - if (unlikely(!uh)) + if (unlikely(!uh) || !static_branch_unlikely(&udp_encap_needed_key)) goto flush; /* Don't bother verifying checksum if we're going to flush anyway. */ -- cgit v1.2.3-59-g8ed1b