From 4fd19c15decedd06d707e2691c24fce08700e2b1 Mon Sep 17 00:00:00 2001 From: Eli Cooper Date: Tue, 1 Nov 2016 23:45:13 +0800 Subject: [PATCH] ip6_udp_tunnel: remove unused IPCB related codes Some IPCB fields are currently set in udp_tunnel6_xmit_skb(), which are never used before it reaches ip6tunnel_xmit(), and past that point the control buffer is no longer interpreted as IPCB. This clears these unused IPCB related codes. Currently there is no skb scrubbing in ip6_udp_tunnel, otherwise IPCB(skb)->opt might need to be cleared for IPv4 packets, as shown in 5146d1f1511 ("tunnel: Clear IPCB(skb)->opt before dst_link_failure called"). Signed-off-by: Eli Cooper Signed-off-by: David S. Miller --- net/ipv6/ip6_udp_tunnel.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c index a7520528ecd2..b283f293ee4a 100644 --- a/net/ipv6/ip6_udp_tunnel.c +++ b/net/ipv6/ip6_udp_tunnel.c @@ -88,9 +88,6 @@ int udp_tunnel6_xmit_skb(struct dst_entry *dst, struct sock *sk, uh->len = htons(skb->len); - memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); - IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED - | IPSKB_REROUTED); skb_dst_set(skb, dst); udp6_set_csum(nocheck, skb, saddr, daddr, skb->len); -- 2.20.1