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How can I reset the ACLs on a ZFS file system on OpenIndiana that is exported via NFS4 and replace it with inherited permissions? Basically, I want to do the equivalent of icacls "C:\path\to\folder" /reset /T /C on Windows on this machine. However, neither the chmod command on OpenIndiana nor the nfs4_setacl seems to allow for deleting all ACLs although the client correctly interprets inherited ACLs if a node does not have an own one.

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You can remove all non trivial ACLs in ZFS with the following: chmod A- filename

Source: http://docs.sun.com/app/docs/doc/819-5461/ftyxi?a=view

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chmod A- replaces the ACL with a default ACL representing the permission bits. I want to remove the ACL completely. – Christoph Jan 14 '11 at 16:22
That is precisely what "chmod A-" is doing. The "default ACL representing the permission bits" is precisely what you got with a file having no ACL set. – jlliagre Jan 17 '11 at 0:47
But if I use Windows on the SMB share, I can also remove also the default ACL and it still works on all OSes. If I investigate the ACLs via Windows, there is a difference: when using chmod A-, the ACL is not inherited. – Christoph Jan 18 '11 at 10:39
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You might also want to set 'aclinherit' peoperty on zfs volume:

zfs set aclinherit=passthrough tank/volume
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