[Thinlinc-technical] Thinlinc 4.0 & 64bit unfsd

[Henrik Andersson]

Hi Rafi,

I have created a bug for this report which you will find at the 
following address:

https://www.cendio.com/bugzilla/show_bug.cgi?id=4592


Regards,

Henrik Andersson


On 04/04/2013 04:40 PM, Rafael Ostertag wrote:
> Hi list
>
> We have a rather annoying issue here, involving the 64bit unfsd 
> shipped with the ThinLinc client 4.0.0: when copying files to an 
> exported volume on the client machine, we get 'Input/output error'. 
> Sometimes it takes a while until copying files fails, other times it 
> fails right away on the first file to copy.
>
> Tracing cp(1) using strace(1) revealed, that the open(2) syscall 
> fails, when the O_EXCL flag is used in combination with O_CREAT, in 
> order to create the destination file initially on the client machine, 
> leaving an empty file behind. In case the destination already exists, 
> cp(1) simply opens it using O_WRONLY|O_TRUNC which does not fail.
>
> So we basically end up with having to issue the copy command twice in 
> order to copy a file to a volume: once in order to create the empty 
> file and tricking the second attempt into passing O_WRONLY|O_TRUNC to 
> open(2).
>
> This behavior is not limited to cp(1), Thunar (XFCE), Caja (MATE), and 
> Nautilus also complain about Input/output error when files are 
> initially created on the exported volume.
>
> We replaced the 64bit ThinLinc client by the 32bit version and the 
> issue was gone. So, we strongly suspect the 64bit unfsd being the 
> culprit.
>
> Does anybody else experience this behavior?
>
> Cheers
> rafi
>
> P.S.: ThinLinc server is running Ubuntu 12.04 AMD64 and clients are 
> running Ubuntu 12.04/12.10 AMD64. ThinLinc 4.0.0 on both ends.
>
>


-- 
---
Henrik Andersson
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