| Message ID | 53703DC0.2070204@gmail.com |
|---|---|
| State | Rejected, archived |
| Delegated to: | David Miller |
| Headers | show |
Hi, Eric && David
This patch is similar to the following patch.
commit 1f8438a853667d48055ad38384c63e94b32c6578
Author: Eric Dumazet <eric.dumazet@gmail.com>
Date: Sat Apr 3 15:09:04 2010 -0700
icmp: Account for ICMP out errors
When ip_append() fails because of socket limit or memory shortage,
increment ICMP_MIB_OUTERRORS counter, so that "netstat -s" can report
these errors.
LANG=C netstat -s | grep "ICMP messages failed"
0 ICMP messages failed
For IPV6, implement ICMP6_MIB_OUTERRORS counter as well.
# grep Icmp6OutErrors /proc/net/dev_snmp6/*
/proc/net/dev_snmp6/eth0:Icmp6OutErrors 0
/proc/net/dev_snmp6/lo:Icmp6OutErrors 0
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Best Regards!
Zhu Yanjun
On 05/12/2014 11:19 AM, zhuyj wrote:
> Hi, Eric && David
>
> ____ ______________
> | | | |
> | PC |<------->| MIPS 32 core |
> |____| |______________|
>
> When ping from a PC to a board (MIPS 32 core), because of socket limit,
> ping echo will fail. But ICMP_MIB_OUTERRORS counter is not incremented.
> In this case, "netstat -s" can not report these errors.
>
> This patch will fix this problem. Now it is in the attachment. Please
> check it.
>
> Best Regards!
> Zhu Yanjun
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From: zhuyj <zyjzyj2000@gmail.com> Date: Mon, 12 May 2014 11:19:28 +0800 > Hi, Eric && David > > ____ ______________ > | | | | > | PC |<------->| MIPS 32 core | > |____| |______________| > > When ping from a PC to a board (MIPS 32 core), because of socket > limit, > ping echo will fail. But ICMP_MIB_OUTERRORS counter is not > incremented. > In this case, "netstat -s" can not report these errors. > > This patch will fix this problem. Now it is in the attachment. Please > check it. The only time icmp_xmit_lock() can fail is if we try to generate an ICMP response to a failure to send another ICMP packet. It is an entirely different situation from Eric's other patch which you've mentioned in this thread, and I do not think this case warrants a statistic bump at all. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
From af800d0f123cf9c66a9ae167baa7dc1d25d0cd1f Mon Sep 17 00:00:00 2001
From: Zhu Yanjun <Yanjun.Zhu@windriver.com>
Date: Mon, 12 May 2014 11:07:20 +0800
Subject: [PATCH 1/1] icmp: account for ICMP out errors because of socket
limit
When icmp_xmit_lock fails because of socket limit or memory shortage,
increment ICMP_MIB_OUTERRORS counter, so that "netstat -s" can report
these errors.
netstat -s | grep "ICMP messages failed"
0 ICMP messages failed
Signed-off-by: Zhu Yanjun <Yanjun.Zhu@windriver.com>
---
net/ipv4/icmp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 0134663..9a0bd7c 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -342,8 +342,10 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
return;
sk = icmp_xmit_lock(net);
- if (sk == NULL)
+ if (sk == NULL){
+ ICMP_INC_STATS_BH(net, ICMP_MIB_OUTERRORS);
return;
+ }
inet = inet_sk(sk);
icmp_param->data.icmph.checksum = 0;
--
1.7.9.5