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To: Rick Macklem <rmacklem@uoguelph.ca>
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Cc: freebsd-fs@freebsd.org
Subject: Re: NFS I/O or permission denied errors
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On 04/08/12 00:28, Rick Macklem wrote:
> Oops, I didn't see that the client was a Linux one. I have no idea 
> what the semantics of a Linux "umount -f" is, although I'd still try 
> it without "-f" I was you. 
Thanks, - I tried with the force -f on the Linux and no change, I/O 
error within 2 mins.

I captured the mount/umount requests with tshark and I can see no 
difference, how the FreeBSD nfs server responds to successful/failed 
mount requests.  In fact the Linux is sending the FIN.

Moreover, I could reproduce this between a CentOS 5.8 nfs server and a 
CentOS 6.3 nfs client.

So I think this is a Linux bug - I'll try the linux-nfs@ mailing list to 
discuss this further.

I'm not sure if this is the same bug as I get for the krb5 mounts (there 
the error message is permission denied), will make a tshark capture too 
with that.

Thanks for the ideas,

Attila