Re: implementing reiserfs in C++ for a new OS

[Hans Reiser <reiser@namesys.com>]

Ramachandra K wrote:

>Hello,
>
>I am planning to implement ReiserFS on my operating system named Capital 
>(www.mitpune.com/research/capital1.html). To give a brief background - 
>Capital is a 32-bit Object Oriented operating system for the Intel
>i386 range of
>microprocessors. Capital's features include multithreading,virtual memory 
>and a VFS interface.
>
>The implementation language of Capital is C++ and hence I, along with my
>team, would like to implement ReiserFS from scratch in C++. I know that
>this is a daunting task requiring considerable effort. The main motivation,
>in addition to implementing an efficient file system for my operating system,
>is to acquire an in depth understanding of the principles behind the design
>of ReiserFS and possibly come up with some new ideas.
>
>It would be of great help if I can get some pointers about how do I go about
>understanding ReiserFS.
>
>Currently I have got a bird's eye view of ReiserFS (plugins, items,
>dancing trees etc).
>But I am still grappling with the following issues:
>
>1)I have not been able to get any information about the on-disk structure
>(i.e where is the superblock, bitmaps etc). I guess I can get it by
>reading the source
> (probably mkreiserfs code would also be helpful). Is there any other
>source of information ?
>  
>
Just the source.  I don't see why reading the source is difficult.  It 
should be easy to convert V4 C to C++ (C++ to C would be harder.....)

>2)All the information that is available at namesys.com is about Reiser4 and
>I would like to know where I could get more information about version 3.
>  
>
Using V3 for a new OS is crazy.  Use V4.  V3 is obsolete.

>I would greatly appreciate suggestions and pointers to more information.
>
>(Please CC the replies to me as I am currently not subscribed to the
>mailing list)
>
>rgds
>Ram
>
>
>  
>
Is it a free OS, or do you need to buy a license from us in addition to 
the GPL?