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I am attempting to utilize NFS4 ACL's in an environment already utilizing POSIX ACL's. I've found a handful of sites on the internet that explain some technical details about NFS4 ACL's and how they're created, but the tools seem to fail for me when I try to execute them.

Does anyone have a good resource/tutorial to explain how to setup NFS4 ACLs?

When I try to change the ACL set from the server:

[root@ny-bar01 foo_server]# nfs4_setfacl -e /nfs/obfuscate/
Operation to request attribute not supported.
Failed to instantiate ACL.

When I try to change the ACL set from the client:

[root@ny-baz02 foo_client]# nfs4_setfacl -R -e .
Failed setxattr operation: Operation not permitted
An error occurred during recursive file tree walk.
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Do you have no_root_squash set for your nfs exports? That may cause your operation not permitted error. – Jeff Strunk Nov 3 '11 at 18:14
Nope, root squash is enabled – Peter Grace♦ Nov 4 '11 at 12:47
Now that I reread my comment, I should've defined "that" better. Try using no_root_squash or set the ACL as a non-root user. – Jeff Strunk Nov 4 '11 at 17:00
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For the record, we found out that ext4 does not natively support NFS ACL's. There are a few filesystems with experimental NFS4 ACL support, but, experimental is not the word I want attached to my production environment.

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