Simple file system

File system

- Directories
- Files

- Inode
  Each inode describes a data structure on the hard disk, storing the properties of a file.
  
  Struct
    - Owner, Group Owner of the file.
    - File type
    - Permissions
    - Date and time of creation, last read and change.
    - Date and time this information has been changed in the inode.
    - Number of links to this file.
    - File size
    - An address defining the actual location of the file data.
    
  Inode doesn't store the file name and directory.
  
- Expose syscalls like open, close, read, write

- Directory implementation
  - Use linear list.

Linked list based implementation for allocating disk blocks for files.

- Data bitmap
- Inode bitmap

- Superblock

Reference http://pages.cs.wisc.edu/~remzi/OSTEP/file-implementation.pdf