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authorTom Herbert <tom@herbertland.com>2016-10-16 21:25:35 -0700
committerDavid S. Miller <davem@davemloft.net>2016-10-17 10:30:18 -0400
commitab3a70bef8f36b3884c7bee1f95c09c888ceb43e (patch)
tree766518e8857a9fb5423d47398203b3020463471c /net/ipv6/ila
parentab530f63e7fbac2b0a233da9d31e21a86d1863f5 (diff)
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ila: Don't use dest cache when gateway is set
If the gateway is set on an ILA route we don't need to bother with using the destination cache in the ILA route. Translation does not change the routing in this case so we can stick with orig_output in the lwstate output function. Tested: Ran netperf with and without gateway for LWT route. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ila')
-rw-r--r--net/ipv6/ila/ila_lwt.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv6/ila/ila_lwt.c b/net/ipv6/ila/ila_lwt.c
index d0a98d9ed313..9fafba62aaa7 100644
--- a/net/ipv6/ila/ila_lwt.c
+++ b/net/ipv6/ila/ila_lwt.c
@@ -36,6 +36,7 @@ static inline struct ila_params *ila_params_lwtunnel(
static int ila_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct dst_entry *orig_dst = skb_dst(skb);
+ struct rt6_info *rt = (struct rt6_info *)orig_dst;
struct ila_lwt *ilwt = ila_lwt_lwtunnel(orig_dst->lwtstate);
struct dst_entry *dst;
int err = -EINVAL;
@@ -46,6 +47,13 @@ static int ila_output(struct net *net, struct sock *sk, struct sk_buff *skb)
ila_update_ipv6_locator(skb, ila_params_lwtunnel(orig_dst->lwtstate),
true);
+ if (rt->rt6i_flags & (RTF_GATEWAY | RTF_CACHE)) {
+ /* Already have a next hop address in route, no need for
+ * dest cache route.
+ */
+ return orig_dst->lwtstate->orig_output(net, sk, skb);
+ }
+
dst = dst_cache_get(&ilwt->dst_cache);
if (unlikely(!dst)) {
struct ipv6hdr *ip6h = ipv6_hdr(skb);