Patent attributes
Techniques are disclosed for a configurable stackable filesystem (CSF) that interfaces with an underlying filesystem and client applications via a virtual filesystem interface (VFS). The CSF can perform a variety of operations on its files and directories. The operations implemented by the CSF can be configured to be performed via a configuration file on the specified files/directories. These operations comprise monitoring/logging including permissions and access control lists (ACL) changes, encryption, compression, rate-limiting and time-of-use enforcement, etc. The configuration file can be updated and loaded into the CSF with immediate effect at runtime, and without requiring to unmount the CSF and disrupting the processes using it. The CSF itself is advantageously modularly implemented as multiple layers or individual CSFs each specializing in one type of operation.
