[OpenAFS] Windows client spraying file server.

[Anders Magnusson]

Jeffrey Altman wrote:
> This was fixed in 1.5.63:
>
>  * When given a choice between an error from rx_Write()
>    or RXAFS_EndStoreData(), use the rx_Write() error.
>    This ensures that over quota and access denied errors
>    are acted upon.
>   
Thanks, it was not in the release notes so I didn't see it :-) 
Obviously there are
many paths where over quota checks are needen.

-- Ragge


> Jeffrey Altman
>
>
> Anders Magnusson wrote:
>   
>> We just noticed a quite disturbing event on some windows clients; they
>> are sending packets continuously to
>> a fileserver, causing the fileserver process to take 100% CPU.  And more
>> annoying, noone is
>> logged in to the machines when they do so.  afsd_service works, but
>> cannot be restarted and have to be
>> killed hard.  Despite this, afs works when logging in to the machine but
>> it continue to spray packets.
>>
>> Fileserver runs 1.4.11, client 1.5.62.  I didn't notice anything in the
>> changelog that says that this bug
>> is fixed in a later version.
>>
>> A quick fs trace -on + fs trace -dump gives entries like the below over
>> and over again.  Any hints?
>>
>> -- Ragge
>>
>>
>> time 0.866130, tid 3756 rx_Write succeeded bp 0x05365C14, 4096
>> time 0.866260, tid 3756 rx_Write succeeded bp 0x05365CA4, 4096
>> time 0.884850, tid 3756 rx_Write failed bp 0x05365D34, 0 != 4096
>> time 0.884870, tid 3756 cm_Analyze connp 0x293BC060, code 0xffffffff
>> time 0.884870, tid 3756 cm_Analyze: Rx Call Dead addr[130.240.42.225]
>> forcedNew[no]
>> time 0.884870, tid 3756 CALL StoreData FAILURE scp 0x03D89798, code
>> 0x66543202
>> time 0.884930, tid 3756 cm_ConnByServer returning conn 0x293BC060
>> time 0.884960, tid 3756 CALL StartRXAFS_StoreData64 scp 0x03D89798,
>> offset 0x0:00025000, length 0x15000
>> time 0.885400, tid 3756 rx_Write succeeded bp 0x05365284, 4096
>> time 0.885470, tid 3756 rx_Write succeeded bp 0x05365314, 4096
>> time 0.885530, tid 3756 rx_Write succeeded bp 0x053653A4, 4096
>> time 0.885570, tid 3756 rx_Write succeeded bp 0x05365434, 4096
>> time 0.885610, tid 3756 rx_Write succeeded bp 0x053654C4, 4096
>> time 0.885650, tid 3756 rx_Write succeeded bp 0x05365554, 4096
>> time 0.885700, tid 3756 rx_Write succeeded bp 0x053655E4, 4096
>> time 0.885740, tid 3756 rx_Write succeeded bp 0x05365674, 4096
>> time 0.885780, tid 3756 rx_Write succeeded bp 0x05365704, 4096
>> time 0.886720, tid 3856 SRXAFSCB_TellMeAboutYourself from host
>> 0x82f02ae1 port 7000
>> time 0.888370, tid 3756 rx_Write succeeded bp 0x05365794, 4096
>> time 0.888430, tid 3756 rx_Write succeeded bp 0x05365824, 4096
>> time 0.888490, tid 3756 rx_Write succeeded bp 0x053658B4, 4096
>> time 0.888570, tid 3756 rx_Write succeeded bp 0x05365944, 4096
>> time 0.888630, tid 3756 rx_Write succeeded bp 0x053659D4, 4096
>> time 0.888690, tid 3756 rx_Write succeeded bp 0x05365A64, 4096
>> time 0.888790, tid 3756 rx_Write succeeded bp 0x05365AF4, 4096
>> time 0.888850, tid 3756 rx_Write succeeded bp 0x05365B84, 4096
>> time 0.888910, tid 3756 rx_Write succeeded bp 0x05365C14, 4096
>> time 0.889000, tid 3756 rx_Write succeeded bp 0x05365CA4, 4096
>> time 0.919260, tid 3756 rx_Write failed bp 0x05365D34, 0 != 4096
>> time 0.919270, tid 3756 cm_Analyze connp 0x293BC060, code 0xffffffff
>> time 0.919270, tid 3756 cm_Analyze: Rx Call Dead addr[130.240.42.225]
>> forcedNew[no]
>> time 0.919270, tid 3756 CALL StoreData FAILURE scp 0x03D89798, code
>> 0x66543202
>> time 0.919310, tid 3756 cm_ConnByServer returning conn 0x293BC060
>> time 0.919340, tid 3756 CALL StartRXAFS_StoreData64 scp 0x03D89798,
>> offset 0x0:00025000, length 0x15000
>> time 0.919780, tid 3756 rx_Write succeeded bp 0x05365284, 4096
>> time 0.919850, tid 3756 rx_Write succeeded bp 0x05365314, 4096
>> time 0.919910, tid 3756 rx_Write succeeded bp 0x053653A4, 4096
>> time 0.919950, tid 3756 rx_Write succeeded bp 0x05365434, 4096
>> time 0.919990, tid 3756 rx_Write succeeded bp 0x053654C4, 4096
>> time 0.920030, tid 3756 rx_Write succeeded bp 0x05365554, 4096
>> time 0.920080, tid 3756 rx_Write succeeded bp 0x053655E4, 4096
>> time 0.920120, tid 3756 rx_Write succeeded bp 0x05365674, 4096
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