The real file systems were separated from the operating system and system services by an interface layer known as the Virtual File system, or VFS.
VFS allows Linux to support many, often very different, file systems, each presenting a common software interface to the VFS.
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As each file system is initialised, it registers itself with the VFS. This happens as the operating system initialises itself at system boot time.
VFS allows Linux to support many, often very different, file systems, each presenting a common software interface to the VFS.
EXT2 Directories
As each file system is initialised, it registers itself with the VFS. This happens as the operating system initialises itself at system boot time.
When you build the Linux kernel you are asked if you want each of the supported file systems. When the kernel is built, the file system startup code contains calls to the initialisation routines of all of the built in file systems.
