Weird Linux - FreeBSD/ZFS NFSv4 interoperability problem

[David Brodbeck]

On Fri, Sep 3, 2010 at 5:55 PM, Rick Macklem <rmacklem at uoguelph.ca> wrote:
>>
>> Here's a capture for you. This is a Linux client (192.168.30.30)
>> working against a FreeBSD 8.1-RELEASE server (192.168.30.102). If you
>> need a capture using FreeBSD 9, that'll require some more setup on my
>> part and I won't be able to get to it until Monday.
>
> Ok, The server is returning NFS4ERR_OLD_STATEID, which means that the
> seqid# inside the stateid is out of date. I think the original intent
> of this was to be a debugging aid for client writers, but a discussion
> on the nfsv4 mailing list pretty much concluded that it was useless.
> (It is definitely the case that the server doesn't care. A separate
> seqd# is used to order the open/lock/close ops.)
>
> So, please try the attached little patch that just disables the server
> check for this case for Close. (The line #s will be different than
> 8.1, but all it is doing is commenting out the test for this case in
> nfsrv_openupdate(), if the patch won't apply directly.)

This seems to have changed the problem.  Now I get the following error
during checkouts:

svn: In directory 'documentation/software-notes'
svn: Can't copy
'documentation/software-notes/.svn/tmp/text-base/directory-server-install-notes.txt.svn-base'
to 'documentation/software-notes/.svn/tmp/directory-server-install-notes.txt.tmp.tmp':
Input/output error

I don't see any related errors in the syslog on the client or server.

This is on FreeBSD 8.1-RELEASE; I'm going to try to test with 9 later today.