Re: Regarding a Simple Version of nfs & nfsd

[Avishay Traeger <atraeger@cs.sunysb.edu>]

On Sun, 2006-03-19 at 20:18 -0800, UZAIR LAKHANI wrote:
> Hello All,
> 
> I myself want to write a network file system. I want
> to find out how I can get the simplest version of nfs
> and nfsd that implements the simplest file system
> actions without any other features like the security
> issues.
> 
> I want this type of nfs and nfsd code as to get the
> help about how the file system routines are handled in
> a network environment.
> 
> Upto now I am using Wrapfs (a wrapper file system)
> code by Erez Zadok. That is I mount wrapfs on a mount
> point and the read/write on the mount point will
> actually be read/write on the underlying file system.
> 
> I want to extend this idea in to a network file sytem
> i.e. the client does nothing but trasfers the
> read/write request to the server which does the actual
> read/write.

I don't think that you can implement NFS using a stackable file system.
A stackable file system sits between the VFS and a regular file system.
The stackable file system can change data, operations, etc. before
calling the lower level file system methods.  However, they cannot
change the transport method.

Avishay Traeger
http://www.fsl.cs.sunysb.edu/~avishay