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From: Duan Jiong <duanj.fnst@cn.fujitsu.com>
To: David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>
Subject: [PATCH] ipv4: distinguish EHOSTUNREACH from the ENETUNREACH
Date: Fri, 14 Feb 2014 18:26:22 +0800	[thread overview]
Message-ID: <52FDEF4E.3010806@cn.fujitsu.com> (raw)


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>
---
 net/ipv4/route.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 25071b4..6f6dd85 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -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;
 
-- 
1.8.3.1

             reply	other threads:[~2014-02-14 10:27 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-14 10:26 Duan Jiong [this message]
2014-02-17  4:46 ` [PATCH] ipv4: distinguish EHOSTUNREACH from the ENETUNREACH David Miller

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