I'm happy with the case as specified. Initially I missed how this would actually be requested but on second reading I saw that the caller passes the V_RDDIR_ACCFILTER flag.
Is this case intended to modify the CIFS server to pass this flag or is there another case for that ? I think there is a possibly interesting (to some people anyway) RFE in here for local ZFS filesystems. A per dataset property that enables this behaviour. Not this case though. Regardless of the answers to the above I'm happy with it as specified. -- Darren J Moffat