Better interop for NFS/SMB file share mode/reservation

J. Bruce Fields bfields at
Wed Mar 6 15:11:50 UTC 2019

On Tue, Mar 05, 2019 at 04:47:48PM -0500, J. Bruce Fields wrote:
> On Thu, Feb 14, 2019 at 04:06:52PM -0500, J. Bruce Fields wrote:
> > After this:
> > 
> >
> > 
> > delegations would no longer conflict with opens from the same tgid.  So
> > if your threads all run in the same process and you're willing to manage
> > conflicts among your own clients, that should still allow you to do
> > multiple opens of the same file without giving up your lease/delegation.
> > 
> > I'd be curious to know whether that works with Samba's design.
> Any idea whether that would work?
> (Easy?  Impossible?  Possible, but realistically the changes required to
> Samba would be painful enough that it'd be unlikely to get done?)

Volker reminds me off-list that he'd like to see Ganesha and Samba work
out an API in userspace first before commiting to a user<->kernel API.

Jeff, wasn't there some work (on Ceph maybe?) on a userspace delegation
API?  Is that close to what's needed?

In any case, my immediate goal is just to get knfsd fixed, which doesn't
really commit us to anything--knfsd only needs kernel internal
interfaces.  But it'd be nice to have at least some idea if we're on the
right track, to save having to redo that work later.


More information about the samba-technical mailing list