/data 10.1.2.3(rw,sync,no_subtree_check,no_root_squash)

I have the above in /etc/exports, root on the NFS client can't run chown, it gets EINVAL. Both client and server are running Debian/Wheezy but the server has kernel 3.11 from Debian/Unstable (for BTRFS).

I don't think it's a BTRFS issue as I have another BTRFS NFS server that works well.

Any suggestions as to what I should investigate? Please include the "obvious" things as I probably missed something that's supposed to be obvious.

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