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authorEric Dumazet <eric.dumazet@gmail.com>2011-11-28 20:30:35 +0000
committerDavid S. Miller <davem@davemloft.net>2011-11-29 13:17:03 -0500
commit4d77d2b567ec66a443792d99e96ac760991d80d0 (patch)
tree8724a150e73cf33fd8a2f36f2b2432af3a78a3e8 /include/net/flow_keys.h
parentc3940999b29ca7d6ad9b37b827a058c90fd51992 (diff)
flow_dissector: use a 64bit load/store
Le lundi 28 novembre 2011 à 19:06 -0500, David Miller a écrit : > From: Dimitris Michailidis <dm@chelsio.com> > Date: Mon, 28 Nov 2011 08:25:39 -0800 > > >> +bool skb_flow_dissect(const struct sk_buff *skb, struct flow_keys > >> *flow) > >> +{ > >> + int poff, nhoff = skb_network_offset(skb); > >> + u8 ip_proto; > >> + u16 proto = skb->protocol; > > > > __be16 instead of u16 for proto? > > I'll take care of this when I apply these patches. ( CC trimmed ) Thanks David ! Here is a small patch to use one 64bit load/store on x86_64 instead of two 32bit load/stores. [PATCH net-next] flow_dissector: use a 64bit load/store gcc compiler is smart enough to use a single load/store if we memcpy(dptr, sptr, 8) on x86_64, regardless of CONFIG_CC_OPTIMIZE_FOR_SIZE In IP header, daddr immediately follows saddr, this wont change in the future. We only need to make sure our flow_keys (src,dst) fields wont break the rule. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/flow_keys.h')
-rw-r--r--include/net/flow_keys.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/flow_keys.h b/include/net/flow_keys.h
index e4cb2852656..80461c1ae9e 100644
--- a/include/net/flow_keys.h
+++ b/include/net/flow_keys.h
@@ -2,6 +2,7 @@
#define _NET_FLOW_KEYS_H
struct flow_keys {
+ /* (src,dst) must be grouped, in the same way than in IP header */
__be32 src;
__be32 dst;
union {