Allow read of filesystem names

src/disk.rs

@@ -0,0 +1,8 @@
+use std::io::Result;
+
+/// A disk
+pub trait Disk {
+    fn name(&self) -> &str;
+    fn read_at(&mut self, block: u64, buffer: &mut [u8]) -> Result<usize>;
+    fn write_at(&mut self, block: u64, buffer: &[u8]) -> Result<usize>;
+}