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tntcoda

Member

Registered: 2007-07-24

Posts: 115

Virtual File System, Mounting etc in C++

Hi,

I have a file which acts as a container, it contains (encrypted) files & directories and I have an API for adding stuff to this container, extracting stuff and deleting stuff.

How 'complex' would it be to wrap a virtual file system around this so I could mount the container as a device under linux? I assume I would need to write a kernel driver (ouch), but ideally i would like to be able to mount it with the mount command, then have my driver intercept I/O operations and map them to my somewhat simplistic API.

Is this possible, or is it very hard to pull of?

Thanks

Dieter@be

Forum Fellow

From: Belgium

Registered: 2006-11-05

Posts: 2,000

Website

Re: Virtual File System, Mounting etc in C++

with fuse you can do that i think.
but I take it your thing is not posix compliant? aren't there enough fs'es already you could use instead? or do you mostly want to learn? in that case it's cool

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pyther

Member

Registered: 2008-01-21

Posts: 1,395

Website

Re: Virtual File System, Mounting etc in C++

You could create an ext2 file however that is done and mount that... unless if you want learn.

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Dusty

Schwag Merchant

From: Medicine Hat, Alberta, Canada

Registered: 2004-01-18

Posts: 5,986

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Re: Virtual File System, Mounting etc in C++

If you want to do the kernel module thing, start with the ramfs module, as its relatively simple and doesn't have much filesystem specific stuff in it, so its easy to see where you need to 'hook' your commands into it. I had to work with something like this for some research into versioned filesystems. Its actually not that hard if you know C.

Dusty

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