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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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4
net/ipv4/tcp_ipv4.c
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@@ -1673,7 +1673,7 @@ csum_err:
}
EXPORT_SYMBOL(tcp_v4_do_rcv);
int tcp_v4_early_demux(struct sk_buff *skb, bool *no_dst_cache)
int tcp_v4_early_demux(struct sk_buff *skb)
{
struct net *net = dev_net(skb->dev);
const struct iphdr *iph;
@@ -1719,8 +1719,6 @@ int tcp_v4_early_demux(struct sk_buff *skb, bool *no_dst_cache)
}
}
}
} else {
*no_dst_cache = true;
}
out_err: