Removing ZFS Delegated Permissions (Examples)

You can use the zfs unallow command to remove delegated permissions. For example, user cindys has create, destroy, mount, and snapshot permissions on the tank/cindys file system.

# zfs allow cindys create,destroy,mount,snapshot tank/cindys
       # zfs allow tank/cindys
       -------------------------------------------------------------
       Local+Descendent permissions on (tank/cindys)
               user cindys create,destroy,mount,snapshot
       -------------------------------------------------------------

The following zfs unallow syntax removes user cindys's snapshot permission from the tank/cindys file system:

# zfs unallow cindys snapshot tank/cindys
# zfs allow tank/cindys
-------------------------------------------------------------
Local+Descendent permissions on (tank/cindys)
        user cindys create,destroy,mount
-------------------------------------------------------------
cindys% zfs create tank/cindys/data
cindys% zfs snapshot tank/cindys@today
cannot create snapshot 'tank/cindys@today': permission denied

As another example, user marks has the following permissions on the tank/marks file system:

# zfs allow tank/marks
-------------------------------------------------------------
Local+Descendent permissions on (tank/marks)
        user marks create,destroy,mount
-------------------------------------------------------------

The following zfs unallow syntax removes all permissions for user marks from the tank/marks file system:

# zfs unallow marks tank/marks

The following zfs unallow syntax removes a permission set on the tank file system.

# zfs allow tank
-------------------------------------------------------------
Permission sets on (tank)
        @myset clone,create,destroy,mount,promote,readonly,snapshot
Create time permissions on (tank)
        create,destroy,mount
Local+Descendent permissions on (tank)
        group staff create,mount
-------------------------------------------------------------
# zfs unallow -s @myset tank
$ zfs allow tank
-------------------------------------------------------------
Create time permissions on (tank)
        create,destroy,mount
Local+Descendent permissions on (tank)
        group staff create,mount
-------------------------------------------------------------