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ipv4: distinguish EHOSTUNREACH from the ENETUNREACH

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since commit 251da413("ipv4: Cache ip_error() routes even when not forwarding."),
the counter IPSTATS_MIB_INADDRERRORS can't work correctly, because the value of
err was always set to ENETUNREACH.

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Duan Jiong 2014-02-14 18:26:22 +08:00 committed by David S. Miller
parent 891de74d69
commit cd0f0b95fd
1 changed files with 7 additions and 2 deletions
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9
net/ipv4/route.c
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@ -1695,8 +1695,11 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
fl4.daddr = daddr;
fl4.saddr = saddr;
err = fib_lookup(net, &fl4, &res);
if (err != 0)
if (err != 0) {
if (!IN_DEV_FORWARD(in_dev))
err = -EHOSTUNREACH;
goto no_route;
}
RT_CACHE_STAT_INC(in_slow_tot);
@ -1712,8 +1715,10 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
goto local_input;
}
if (!IN_DEV_FORWARD(in_dev))
if (!IN_DEV_FORWARD(in_dev)) {
err = -EHOSTUNREACH;
goto no_route;
}
if (res.type != RTN_UNICAST)
goto martian_destination;