ipv4: fix counter in_slow_tot

since commit 89aef8921bf("ipv4: Delete routing cache."), the counter
in_slow_tot can't work correctly.

The counter in_slow_tot increase by one when fib_lookup() return successfully
in ip_route_input_slow(), but actually the dst struct maybe not be created and
cached, so we can increase in_slow_tot after the dst struct is created.

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 6f6dd85bdffc28ed94fe924493e704d9ea94bc5f..4c011ec69ed43efacdf692592a849d691ca93d2d 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1597,6 +1597,7 @@ static int __mkroute_input(struct sk_buff *skb,
        rth->rt_gateway = 0;
        rth->rt_uses_gateway = 0;
        INIT_LIST_HEAD(&rth->rt_uncached);
+       RT_CACHE_STAT_INC(in_slow_tot);
 
        rth->dst.input = ip_forward;
        rth->dst.output = ip_output;
@@ -1701,8 +1702,6 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
                goto no_route;
        }
 
-       RT_CACHE_STAT_INC(in_slow_tot);
-
        if (res.type == RTN_BROADCAST)
                goto brd_input;
 
@@ -1773,6 +1772,7 @@ local_input:
        rth->rt_gateway = 0;
        rth->rt_uses_gateway = 0;
        INIT_LIST_HEAD(&rth->rt_uncached);
+       RT_CACHE_STAT_INC(in_slow_tot);
        if (res.type == RTN_UNREACHABLE) {
                rth->dst.input= ip_error;
                rth->dst.error= -err;