mkfs

mkfs written in pure Rust.

Motivation

I needed a library that could work with file systems in no_std environments for my kernel. Additionally, for testing, I needed a library that I could use easily to create and edit new file system images, and that I could use in my build.rs file. Those things can be done by mke2fs. However, mke2fs is not available out of the box on all platforms, so I opted for something that can be integrated in the cargo build process.

Supported file systems

• ext2 (in progress)
• ext3
• ext4
• and more...

Features

• Command line tool to create and edit file system images
• Usable as library (see below)
• Compatibility with no_std crates (you need to implement the BlockDevice trait for your data source)

Usage

Command line

(subject to change)

# create a 1MiB ext2 file system in fs.img with the structure of my_directory
mkfs ext2 create --size 1MB --out fs.img --in-dir ./my_directory

Library

(not implemented yet)

Use mkfs directly

Works nicely in build.rs files.

mkfs::ext2::create(
    Ext2CreateOption {
        out: PathBuf::from("fs.img"),
        // all the other options
    }
);

Use with a no_std crate

// something like the following, still trying to figure this out
let block_device: MyBlockDevice = todo!("implement the BlockDevice trait");

let fs = Ext2Fs::new(block_device);
let file = fs.create_file("hello_world.txt");
...