Implement immediate files in the Minix File System, for files of size up to 32 bytes. Implement only for the file system mounted at /home.
Think about what functionalities need to be changed to implement immediate files. Some broad points:
- ● File creation: you can start by creating the file as an immediate one. When a file grows beyond 32B, then you can make it a regular file.
- ● File read: if it is an immediate file, you can respond with the inode structure contents. If not, you can follow the default behavior of looking up zones.
- ● File write: similar to read. You must take care to ensure that if you want to write to the inode structure, then the new file size is still within 32B. When a regular file shrinks to less than 32 bytes, there is no need to come back to immediate mode.
- ● File delete: deleting immediate files does not require any handling of zones.
Helpful files:
● www.minix3.org/theses/gerofi-minix-vfs.pdf
● minix.pdf – Uploaded in Moodle under Lab 6
