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Revert "ipv4: tcp: dont cache unconfirmed intput dst"

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This reverts commit c074da2810.

This change has several unwanted side effects:

1) Sockets will cache the DST_NOCACHE route in sk->sk_rx_dst and we'll
   thus never create a real cached route.

2) All TCP traffic will use DST_NOCACHE and never use the routing
   cache at all.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2012-06-27 17:05:06 -07:00
parent e440cf2ca0
commit c10237e077
9 changed files with 15 additions and 20 deletions
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8
include/net/route.h
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@@ -201,18 +201,18 @@ static inline struct rtable *ip_route_output_gre(struct net *net, struct flowi4
}
extern int ip_route_input_common(struct sk_buff *skb, __be32 dst, __be32 src,
u8 tos, struct net_device *devin, bool noref, bool nocache);
u8 tos, struct net_device *devin, bool noref);
static inline int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src,
u8 tos, struct net_device *devin)
{
return ip_route_input_common(skb, dst, src, tos, devin, false, false);
return ip_route_input_common(skb, dst, src, tos, devin, false);
}
static inline int ip_route_input_noref(struct sk_buff *skb, __be32 dst, __be32 src,
u8 tos, struct net_device *devin, bool nocache)
u8 tos, struct net_device *devin)
{
return ip_route_input_common(skb, dst, src, tos, devin, true, nocache);
return ip_route_input_common(skb, dst, src, tos, devin, true);
}
extern void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu,