[vbox-dev] windows shared folders source code?

Huihong Luo huisinro at yahoo.com
Tue Jun 24 08:49:53 PDT 2008

Hi Klaus,
Thanks. It's great that you will put out the windows Shared Folders src code.
As for the performance, I didn't do thorough testing, but you can get an idea by doing this simple test:
share the whole host system drive, usually C:, then run notepad.exe
then launch map the shared drive in windows XP guest inside virtualbox, say, you map Z: to be pointing to the host c: drive. then launch notepad.exe by typing z:\windows\system32\notepad.exe
You will note that it's much slower compared to local notepad.

--- On Tue, 6/24/08, Klaus Espenlaub <Klaus.Espenlaub at Sun.COM> wrote:

From: Klaus Espenlaub <Klaus.Espenlaub at Sun.COM>
Subject: Re: [vbox-dev] windows shared folders source code?
To: huisinro at yahoo.com, "VirtualBox developer's list" <vbox-dev at virtualbox.org>
Date: Tuesday, June 24, 2008, 6:31 AM

Huihong Luo wrote:
> I assume you used the nulmrx sample from MS DDK. Sample code is supposed 
> to be released without license issues. Is it not right? There are many 
> open source file systems modified from MS samples, e.g., the EXT2 file 
> system on sf.net.

To be honest I don't know. I'm not the one who wrote that code.

But I've asked them and learned that this issue is mostly solved. We 
need to update a few things (e.g. using the WDK 6001) then we can make 
the code part of VBox OSE. So I'm asking for a little patience since 
such cleanup work isn't really high priority. I'll let you know when 
we're ready.

> Over last couple of weeks, I implemented a shared folder driver, which I 
> think is much better performed than the current one. However, there are 
> many tedious stuff, if I can look at your current impl, it would really 
> help me to finish it. Any chance I can get a copy of your code for 
> internal use?

See above. Hopefully done in about a week or so.

> If there is no licensing issues, I'd like to check in my code to the
> edition, so there will be some source code for the windows shared 
> folders driver.

For contributions there's a wiki page describing the process: 

Contributions are always welcome if they actually improve things. What 
tests did you run on your implementation? Getting a filesystem 
bullet-proof is hard work...

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