Re: file leases

[Jamie Lokier <jamie@shareable.org>]

Stephen Rothwell wrote:
> > This was triggered by creating 3rd.jpg (copied locally from
> > elsewhere).  Then viewing it in Internet Explorer on the Windows ME
> > client.  Then closing IE, and trying to copy the file locally.
> 
> Closing IE, won't cause the Windows client to release the lease, it tries
> to hold it as long as possible so that it knows its local cached copy of
> the file is still correct.

Yes, that's what I assumed.

> > At about 11:50:49 I expect to see linux_oplock_receive_message and
> > then linux_release_kernel_oplock -- because I see these at times when
> > there's no stall -- but I *don't* see either in the Samba log after
> > this point:
> 
> So this is not consistent i.e. it works as expected most of the time?

It's not consistent.  Most of the time it stalls with oplocks enabled
in Samba.

Specifically: If I have been viewing or editing a file in Windows,
then most of the time oplocks viewing or editing the same file on the
server stalls.  I thought it was stalling every time.

However when I did these tests today with the "cp" command, I was
surprised to see it not stalling sometimes.  So it is inconsistent.

> > Perhaps more worryingly, there is no communication with Windows ME, so
> > Windows ME may still think it has the oplock.  20 minutes later, after
> > viewing the file a couple more times in ME, and after editing it
> > locally, there are no further messages with "oplock" or "linux" in the
> > Samba log.
> 
> This makes sense as Windows still thinks it has the oplock.
> 
> > It looks like either:
> > 
> >   (1) Linux leases aren't working: they're not signalling Samba.
> > 
> >   (2) or, Samba is not interfacing with Linux leases properly, so
> >       is missing the signal.
> 
> Either is possible.  Is this a standard kernel.org 2.6.8 kernel and
> a standard samba 3.0.6 - or are these distribution versions?

Gentoo versions.

Kernel is gentoo-dev-sources-2.6.8, which is Linux 2.6.8 plus a few small
patches that don't touch locks.c or anything that looks relevant.

Samba is samba-3.0.6-r3, again none of the small patches looks relevant.

-- Jamie