From: Eric Dumazet <dada1@cosmosbay.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "YOSHIFUJI Hideaki / 吉藤英明" <yoshfuji@linux-ipv6.org>,
davem@davemloft.net, netdev@vger.kernel.org
Subject: Re: UDP-Lite and /proc/net/snmp
Date: Sat, 10 Nov 2007 16:16:41 +0100 [thread overview]
Message-ID: <4735CB59.2050708@cosmosbay.com> (raw)
In-Reply-To: <4735C8E9.4030401@cosmosbay.com>
Eric Dumazet a écrit :
> Herbert Xu a écrit :
>> On Sat, Nov 10, 2007 at 11:48:54PM +0900, YOSHIFUJI Hideaki / 吉藤英明
>> wrote:
>>> Hmm..... "netstat -s" from etch (i386) and etch (x86_64) work
>>> fine for me. Same version, same architecture. Strange...
>>
>> Interesting. What does your /proc/net/snmp file look like?
>> And what does netstat -s actually produce?
>>
>> Thanks,
>
> Quite easy :)
>
> A failing one is > 1024 bytes :
>
> Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors
> ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests
> OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails
> FragOKs FragFails FragCreates
> Ip: 2 64 6954137412 0 23489 0 125 0 6790615249 6423886499 2706 0 13881
> 164999330 1503683 34165124 1219558 188 54871924
> Icmp: InMsgs InErrors InDestUnreachs InTimeExcds InParmProbs
> InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps
> InAddrMasks InAddrMaskReps OutMsgs OutErrors OutDestUnreachs
> OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos
> OutEchoReps OutTimestamps OutTimestampReps OutAddrMasks OutAddrMaskReps
> Icmp: 6392743 1256162 3894707 401904 83 20702 172602 1415531 0 3 0 3 0
> 106773069 0 3894707 401904 83 20702 172602 1415531 0 3 0 3 0
> IcmpMsg: InType3 InType4 InType5 InType8 InType11 InType12 InType13
> InType17 OutType0 OutType3 OutType11 OutType14
> IcmpMsg: 3894707 20702 172602 1415531 401904 83 3 3 1414557 105347007
> 11502 3
> Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens
> AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs
> OutRsts
> Tcp: 1 200 120000 -1 62967275 66063269 17969333 24912734 1278435
> 6041838336 5717892916 279078174 361708 35913131
> Udp: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors
> Udp: 640604836 101598293 193394 421746699 133903 0
> UdpLite: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors
> SndbufErrors
> UdpLite: 0 0 0 0 0 0
>
>
> So netstat fails because line 344 in statistics.c :
>
> buf1=TcpExt: SyncookiesSent SyncookiesRecv SyncookiesFailed
> EmbryonicRsts PruneCalled RcvPruned OfoPruned OutOfWindowIcmps
> LockDroppedIcmps ArpFilter TW TWRecycled TWKilled PAWSPassive PAWSActive
> PAWSEstab DelayedACKs DelayedACKLocked DelayedACKLost ListenOverflows
> ListenDrops TCPPrequeued TCPDirectCopyFromBacklog
> TCPDirectCopyFromPrequeue TCPPrequeueDropped TCPHPHits TCPHPHitsToUser
> TCPPureAcks TCPHPAcks TCPRenoRecovery TCPSackRecovery TCPSACKReneging
> TCPFACKReorder TCPSACKReorder TCPRenoReorder TCPTSReorder TCPFullUndo
> TCPPartialUndo TCPDSACKUndo TCPLossUndo TCPLoss TCPLostRetransmit
> TCPRenoFailures TCPSackFailures TCPLossFailures TCPFastRetrans
> TCPForwardRetrans TCPSlowStartRetrans TCPTimeouts TCPRenoRecoveryFail
> TCPSackRecoveryFail TCPSchedulerFailed TCPRcvCollapsed TCPDSACKOldSent
> TCPDSACKOfoSent TCPDSACKRecv TCPDSACKOfoRecv TCPAbortOnSyn
> TCPAbortOnData TCPAbortOnClose TCPAbortOnMemory TCPAbortOnTimeout
> TCPAbortOnLinger TCPAbortFailed TCPMemoryPressures TCPSACKDiscard
> TCPDSACKIgnoredOld TCPDSACKIgnoredNoUndo buf2= TCPSpuriousRTOs
>
>
> So this is an existing kernel bug, not related to UDPlite
I meant a netstat bug of course, sorry :(
It fails to parse /proc/net/netstat , because TcpExt line is bigger than 1024
chars.
To correct it, we might enlarge buf1[] and buf2[] from 1024 to 2048 in
statistics.c, process_fd() function.
next prev parent reply other threads:[~2007-11-10 15:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-10 13:14 UDP-Lite and /proc/net/snmp Herbert Xu
2007-11-10 13:32 ` YOSHIFUJI Hideaki / 吉藤英明
2007-11-10 13:55 ` Eric Dumazet
2007-11-10 14:33 ` Herbert Xu
2007-11-10 14:48 ` YOSHIFUJI Hideaki / 吉藤英明
2007-11-10 14:55 ` Herbert Xu
2007-11-10 15:06 ` Eric Dumazet
2007-11-10 15:16 ` Eric Dumazet [this message]
2007-11-10 15:43 ` Herbert Xu
2007-11-10 20:48 ` Andi Kleen
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