Message ID | 1383842248.9412.84.camel@edumazet-glaptop2.roam.corp.google.com |
---|---|
State | Accepted, archived |
Delegated to: | David Miller |
Headers | show |
From: Eric Dumazet <eric.dumazet@gmail.com> Date: Thu, 07 Nov 2013 08:37:28 -0800 > From: Eric Dumazet <edumazet@google.com> > > By moving code around, we avoid : > > 1) A reload of iph->ihl (bit field, so needs a mask) > > 2) A conditional test (replaced by a conditional mov on x86) > Fast path loads iph->protocol anyway. > > Signed-off-by: Eric Dumazet <edumazet@google.com> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 0242035192f1..d6ef17322500 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -68,13 +68,13 @@ ip: iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph); if (!iph || iph->ihl < 5) return false; + nhoff += iph->ihl * 4; + ip_proto = iph->protocol; if (ip_is_fragment(iph)) ip_proto = 0; - else - ip_proto = iph->protocol; + iph_to_flow_copy_addrs(flow, iph); - nhoff += iph->ihl * 4; break; } case __constant_htons(ETH_P_IPV6): {