Invisible file problem

Invisible file problem

[Bruce Guenter]

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I have come on a situation where a file in a directory is not showing up
in any directory listings, yet is still accessible by direct access.  It
shows up in listings on the server but not on the client.  I did a
capture of the NFS protocol traffic, and the file is showing up in the
readdir call results.  If I recreate the directory using the same file
names but empty files, the behavior persists.

I am running vanilla 2.6.37.1 on both client and server, using NFSv4.
The server filesystem is ext4.

Is this a kernel NFS client bug?  Is there anything else I can do to
diagnose the source of the problem, or any way to work around it?

Thanks.

-- 
Bruce Guenter <bruce@untroubled.org>                http://untroubled.org/

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Re: Invisible file problem

[Trond Myklebust]

On Tue, 2011-02-22 at 15:52 -0600, Bruce Guenter wrote: 
> I have come on a situation where a file in a directory is not showing up
> in any directory listings, yet is still accessible by direct access.  It
> shows up in listings on the server but not on the client.  I did a
> capture of the NFS protocol traffic, and the file is showing up in the
> readdir call results.  If I recreate the directory using the same file
> names but empty files, the behavior persists.
> 
> I am running vanilla 2.6.37.1 on both client and server, using NFSv4.
> The server filesystem is ext4.
> 
> Is this a kernel NFS client bug?  Is there anything else I can do to
> diagnose the source of the problem, or any way to work around it?
> 
> Thanks.

There is a known bug in readdir that has been fixed in 2.6.38-rc6, but
hasn't yet hit the 2.6.37 stable series. Please check the patch at

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git&a=commitdiff&h=d1205f87bbb8040c1408bbd9e0a720310b2b0b9b

and see if it fixes your problem.

Cheers
  Trond

Re: Invisible file problem

[Bruce Guenter]

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On Tue, Feb 22, 2011 at 11:50:47PM -0800, Trond Myklebust wrote:
> There is a known bug in readdir that has been fixed in 2.6.38-rc6, but
> hasn't yet hit the 2.6.37 stable series. Please check the patch at
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git&a=commitdiff&h=d1205f87bbb8040c1408bbd9e0a720310b2b0b9b
> 
> and see if it fixes your problem.

Yes it did, thank you very much.

-- 
Bruce Guenter <bruce@untroubled.org>                http://untroubled.org/

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Re: Invisible file problem

[Joe Landman]

On 02/23/2011 09:50 AM, Bruce Guenter wrote:
> On Tue, Feb 22, 2011 at 11:50:47PM -0800, Trond Myklebust wrote:
>> There is a known bug in readdir that has been fixed in 2.6.38-rc6, but
>> hasn't yet hit the 2.6.37 stable series. Please check the patch at
>>
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git&a=commitdiff&h=d1205f87bbb8040c1408bbd9e0a720310b2b0b9b
>>
>> and see if it fixes your problem.
>
> Yes it did, thank you very much.

Is this a server or client side issue BTW?  I am trying to track 
something that could be related to this down.

Thanks!

Joe


-- 
Joe Landman
landman@scalableinformatics.com

Re: Invisible file problem

[Bruce Guenter]

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On Wed, Feb 23, 2011 at 02:42:36PM -0500, Joe Landman wrote:
> Is this a server or client side issue BTW?  I am trying to track 
> something that could be related to this down.

Client side.

-- 
Bruce Guenter <bruce@untroubled.org>                http://untroubled.org/

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