From 67e28ffd864eebbaf48b404d0a8cb4edd2bdc924 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 9 Mar 2011 20:42:07 -0800 Subject: ipv4: Optimize flow initialization in input route lookup. Like in commit 44713b67db10c774f14280c129b0d5fd13c70cf2 ("ipv4: Optimize flow initialization in output route lookup." we can optimize the on-stack flow setup to only initialize the members which are actually used. Otherwise we bzero the entire structure, then initialize explicitly the first half of it. Signed-off-by: David S. Miller --- net/ipv4/route.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 92a24ea34c1b..ac32d8f3d68f 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2081,12 +2081,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr, { struct fib_result res; struct in_device *in_dev = __in_dev_get_rcu(dev); - struct flowi fl = { .fl4_dst = daddr, - .fl4_src = saddr, - .fl4_tos = tos, - .fl4_scope = RT_SCOPE_UNIVERSE, - .mark = skb->mark, - .iif = dev->ifindex }; + struct flowi fl; unsigned flags = 0; u32 itag = 0; struct rtable * rth; @@ -2123,6 +2118,13 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr, /* * Now we are ready to route packet. */ + fl.oif = 0; + fl.iif = dev->ifindex; + fl.mark = skb->mark; + fl.fl4_dst = daddr; + fl.fl4_src = saddr; + fl.fl4_tos = tos; + fl.fl4_scope = RT_SCOPE_UNIVERSE; err = fib_lookup(net, &fl, &res); if (err != 0) { if (!IN_DEV_FORWARD(in_dev)) -- cgit v1.2.3-59-g8ed1b