Filesystem

The goal of this project was to implement an entire FAT (File Allocation Table)-based filesystem on top of a virtual disk and its software stack. The virtual disk is split into blocks, the first of which is the block API. The block API is used in opening and closing virtual disk files, counting the number of blocks in a disk file, and reading/writing blocks from/to disks. The filesystem layer is above the block API, and is in charge of mounting a filesystem on an open disk, unmounting a filesystem and closing the underlying virtual disk, creating, deleting, opening, and closing files, and reading/writing from/to files.

Here, we can see a high-level diagram of a typical filesystem's software layers, from the disk level through the block and filesystem APIs, all the way to user-space applications. If you would like to see the nitty gritty details of my implementation, please contact me at my email below!