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| author | David Lebrun <david.lebrun@uclouvain.be> | 2017-03-24 10:46:27 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-24 14:47:32 -0700 |
| commit | af4a2209b1344939eaac11f269c261d347cbc3ee (patch) | |
| tree | 4e67bff13827d3aa72f90e7fb0f4dc70c16ef40d /net/ipv6/seg6_iptunnel.c | |
| parent | 19d5a26f5ef8de5dcb78799feaf404d717b1aac3 (diff) | |
| download | lwn-af4a2209b1344939eaac11f269c261d347cbc3ee.tar.gz lwn-af4a2209b1344939eaac11f269c261d347cbc3ee.zip | |
ipv6: sr: use dst_cache in seg6_input
We already use dst_cache in seg6_output, when handling locally generated
packets. We extend it in seg6_input, to also handle forwarded packets, and avoid
unnecessary fib lookups.
Performances for SRH encapsulation before the patch:
Result: OK: 5656067(c5655678+d388) usec, 5000000 (1000byte,0frags)
884006pps 7072Mb/sec (7072048000bps) errors: 0
Performances after the patch:
Result: OK: 4774543(c4774084+d459) usec, 5000000 (1000byte,0frags)
1047220pps 8377Mb/sec (8377760000bps) errors: 0
Signed-off-by: David Lebrun <david.lebrun@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/seg6_iptunnel.c')
| -rw-r--r-- | net/ipv6/seg6_iptunnel.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/net/ipv6/seg6_iptunnel.c b/net/ipv6/seg6_iptunnel.c index dda2c5147ef0..30ef1d1d182e 100644 --- a/net/ipv6/seg6_iptunnel.c +++ b/net/ipv6/seg6_iptunnel.c @@ -237,6 +237,9 @@ static int seg6_do_srh(struct sk_buff *skb) static int seg6_input(struct sk_buff *skb) { + struct dst_entry *orig_dst = skb_dst(skb); + struct dst_entry *dst = NULL; + struct seg6_lwt *slwt; int err; err = seg6_do_srh(skb); @@ -245,8 +248,30 @@ static int seg6_input(struct sk_buff *skb) return err; } + slwt = seg6_lwt_lwtunnel(orig_dst->lwtstate); + +#ifdef CONFIG_DST_CACHE + preempt_disable(); + dst = dst_cache_get(&slwt->cache); + preempt_enable(); +#endif + skb_dst_drop(skb); - ip6_route_input(skb); + + if (!dst) { + ip6_route_input(skb); +#ifdef CONFIG_DST_CACHE + dst = skb_dst(skb); + if (!dst->error) { + preempt_disable(); + dst_cache_set_ip6(&slwt->cache, dst, + &ipv6_hdr(skb)->saddr); + preempt_enable(); + } +#endif + } else { + skb_dst_set(skb, dst); + } return dst_input(skb); } |