SYSTEM AND METHOD FOR PROTECTING CONTENTS OF SHARED LAYER RESOURCES

摘要

A method and system for handling a file operation directed to an original file of a protected layer. A protected layer and a user- or device-specific write layer associated with the protected layer are both mounted. File open operations directed to an original file on the protected layer are instead redirected to one of a dummy file associated with the original file or a write-layer copy of the original file located on the write layer. If neither a dummy file nor a write-layer copy of the original file are on the write layer, a dummy file having the same file name and file attributes as the original file is created in the write layer. Subsequent file operations, such as reading, writing, and closing, are directed to the one of the dummy file or the write-layer copy.

主权项

1. A method of handling file operations comprising:
loading one or more layering drivers of a layering client; mounting a protected layer comprising an original file, wherein the protected layer comprises a read-only application layer and the read-only application layer is shared between one or more users and devices; mounting a write layer, wherein the write layer is specific to one of a user or a device; receiving, from a calling application, a file open request directed to the original file; redirecting the file open request to one of a dummy file associated with the original file or a write-layer copy of the original file, wherein the one of the dummy file or the write-layer copy is on the write layer; and returning a handle to the one of the dummy file or the write-layer copy.