[linux-cifs-client] CIFS and rename of open files

[Jeff Layton]

On Wed, 25 Jun 2008 09:52:23 +0200
Wilhelm Meier <wilhelm.meier at fh-kl.de> wrote:

> Hello Jeff,
> 
> Am Freitag, 6. Juni 2008 schrieb Wilhelm Meier:
> > Am Freitag, 6. Juni 2008 schrieb Jeff Layton:
> > > On Fri, 6 Jun 2008 10:49:26 +0200
> > >
> > > Wilhelm Meier <wilhelm.meier at fh-kl.de> wrote:
> > > > Hello,
> > > >
> > > > are there any news to the issue of renaming open files -
> > > > because this missing feature is preventing the use of cifs as
> > > > user homes on linux systems.
> > >
> > > I was looking at the problem earlier this week, but haven't
> > > gotten all the way to a solution. The issue is very dependent on
> > > server behavior, with windows servers being particularly
> > > problematic. I've been doing some experimentation, but haven't
> > > found a solution that seems to work well for all cases.
> 
> is there any progess or activity from your side? I'm asking because 
> this is a show-stopper using cifs-homes for users with newer 
> kmail-versions.
> Or do you know any workaround in this respect?
> 

I'm afraid that I've been sidetracked into other things and haven't had
time to touch this. The problem is (I think) that CIFS currently tries
to set the DELETE_ON_CLOSE bit using the create flags in the open call,
but this only works if the file is actually being created. So we need
to set the bit with a SET_FILE_INFO call and then try to rename it.

I'm probably wrong on some of this though, this turns out to be a rather
tricky situation to handle correctly, and it will probably take some
experimentation to get it right. I don't know of any workarounds for
this at the moment...

> >
> > Sorry for being unclear here: I mean linux-cifs in combination with
> > samba-server
> 
-- 
Jeff Layton <jlayton at redhat.com>