How to develop a Hello World file backed virtual disk kernel extension for Mac OS X?

Any sample code would be highly appreciated. I tried a couple of days googling on this, but found nothing. I hope experts here can shed some lights.

I am very familar with virtual disk drivers on Windows and Linux, but very new on Mac. We need information on the plumbing IoKit.

I need something to m开发者_如何学JAVAount a plain file to a Mac disk, similar to the builtin hidutil on mounting .dmg file.

Check out macfuse. The wiki includes a number of example file systems.