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authorDavid S. Miller <davem@davemloft.net>2011-05-02 14:37:45 -0700
committerDavid S. Miller <davem@davemloft.net>2011-05-02 14:37:45 -0700
commit5615787257742aab42ecf17c11e3244d9536a48d (patch)
treef9c8a74398964690e3b9583cec99dfc7e7b45511
parent14ad2513ed5b709e566a853f4b515d91c5d83311 (diff)
ipv4: Make sure flowi4->{saddr,daddr} are always set.
Slow path output route resolution always makes sure that ->{saddr,daddr} are set, and also if we trigger into IPSEC resolution we initialize them as well, because xfrm_lookup() expects them to be fully resolved. But if we hit the fast path and flowi4->flowi4_proto is zero, we won't do this initialization. Therefore, move the IPSEC path initialization to the route cache lookup fast path to make sure these are always set. Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/route.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 93f71be1d5d1..64f360d853fb 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2675,6 +2675,10 @@ struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *flp4)
dst_use(&rth->dst, jiffies);
RT_CACHE_STAT_INC(out_hit);
rcu_read_unlock_bh();
+ if (!flp4->saddr)
+ flp4->saddr = rth->rt_src;
+ if (!flp4->daddr)
+ flp4->daddr = rth->rt_dst;
return rth;
}
RT_CACHE_STAT_INC(out_hlist_search);
@@ -2772,15 +2776,10 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4,
if (IS_ERR(rt))
return rt;
- if (flp4->flowi4_proto) {
- if (!flp4->saddr)
- flp4->saddr = rt->rt_src;
- if (!flp4->daddr)
- flp4->daddr = rt->rt_dst;
+ if (flp4->flowi4_proto)
rt = (struct rtable *) xfrm_lookup(net, &rt->dst,
flowi4_to_flowi(flp4),
sk, 0);
- }
return rt;
}

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