Re: Wrapfs a stackable file system

From: kratkin@yahoo.com
Date: Thu Sep 20 2001 - 07:15:55 EST


Some docs about stackable fs (aka wrapfs):
http://www.isi.edu/~johnh/WORK/ucla.html
and:
http://www.isi.edu/~johnh/PAPERS/index.html

On Sat, 22 Sep 2001, David Chow wrote:

> On Fri, 21 Sep 2001, Alexander Viro wrote:
>
> >
> >
> > On 21 Sep 2001, Oystein Viggen wrote:
> >
> > > * [ David Chow]
> > >
> > > > The idea is orinigally from FiST, a stackable file system. But the FiST
> > > > owner Erez seems given up to maintain the project. At the time I receive
> > > > the code, it is so buggy, even unusable, lots of segmentation fault
> > > > problems. I have debugging the fs for quite a while. Now it is useful in
> > > > just use as a file system wrapper. It is useful in chroot environments
> > > > and hardlinks aren't available. It wraps a directory and mount to
> > > > another directory on tops of any filesystems.
> > >
> > > Is this not essentially what we already have with mount --bind in 2.4?
> >
> > Bindings can be used to get the same result, but underlying mechanics is
> > different. Wrapfs is not the most interesting application of FiST, so it's
> > hardly a surprise...
> >
>
> I think you people didn't understand what is wrapfs, if is only a template
> for FiST. The aim is to provide a properly maintained stackable template
> under linux, and so that people can use FiST to develop their own
> filesystem. Currently the wrapfs template is so buggy, I spend weeks to
> fix all the bugs and even rewriting some of the code to make it more
> efficient. This dosn't means --bind, it means it also fix up tons of FS'es
> that is previously produced by using the old buggy FiST template, FiST is
> good for developing new stackable file system, the current problem is that
> the templates are buggy.... you got it??? If you know something is good
> but it is not properly maintained, why not give it a hand and do all the
> people a flavour?
>
> regards,
>
> David
>
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