Re: [ANNOUNCEMENT PATCH COW] proof of concept impementation of cowlinks

[Jörn Engel]

On Mon, 10 May 2004 17:51:27 +0200, Pavel Machek wrote:
> > 
> > What about ino?  I currently return 1, so diff remains fast without
> > any changes.  If someone really needs the difference between inode 2
> > and 3, I would introduce a cstat() system call similar to lstat(),
> > which would return ino=2.
> 
> I think you need to return 2, otherwise inode numbers change when
> cowling is broken.... and that would be bad.

Makes sense.  Damn, now I gotta touch diff as well. :(

> Aha.. That is another neccessary property for get_cow_inode():
> cow_inode can change, any time, unlike normal inode.

Correct.  Still, I prefer cstat(), even though almost all information
is identical to stat.  But the device might change as well, one day.

Jörn

-- 
With a PC, I always felt limited by the software available. On Unix, 
I am limited only by my knowledge.
-- Peter J. Schoenster
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