Notes about FUSE filesystem

Overview

A program, such as ls, mkdir makes a call to a file system routine. For example, open(“/test/fuse/file1.txt”). This call gets sent to the kernel.
If this file is in a FUSE volume, the kernel passes it on to the FUSE kernel module, which then passes it on to the implementation of that file system.
The implementation of open then refers to the actual data structures that represent the file system and returns a file handle. It is open’s job to take a concrete view of data (bits stored on a hard drive) and present an abstract view (a hierarchically organized file system).
The kernel returns the result of the open function to the program that originally made the call.