Abstract: Method and system aspects for supporting hierarchical file system management functions across multiple operating system platforms in a data processing system are provided. In these aspects, a code base provides predetermined functionality for each of a plurality of operating system platforms of the data processing system. Further, a common kernel extension is utilized by the code base, with the common kernel extension supporting a hierarchical file system of the data processing system. The common kernel extension supports file system intervention in the hierarchical file system by handling an interface between each operating system platform and a file system. Also, the common kernel extension further handles an interface between each operating system platform and a device driver.

Abstract: System and method aspects for testing a hierarchical storage management (HSM) system extension of a data processing system are provided. In a system aspect, the system for testing includes a script file mechanism for providing serialized system calls from processes of at least a pseudo device driver of the data processing system, and a compiled test engine means for performing the serialized system calls of the script file. The system calls from processes further include parallel processes of a file system and a pseudo device driver. In a method aspect, the method includes providing a test engine compiled for at least one operating system platform of the data processing system, and performing a test script with the test engine for serializing system calls from parallel processes of the file system and pseudo device driver.