US Patent 10460122 Dynamic permission modes

Embodiments are directed to managing data in a file system. A file system engine provides a file system that includes file system objects that may be accessible by two or more clients that use different native permission schemes. And, a permissions engine may determine map rules based on characteristics of a request to access request a file. The permission engine may execute the one or more map rules to provide platform permission values based on the native permission values. The permission engine may compare requested platform permission values to the platform permission values associated with the file. The permission engine may provide the access rights to the file based on an affirmative result of the comparison.