Re: [LSF/MM TOPIC] New APIs for supporting user-mode file service daemons

[Jeremy Allison <jra@samba.org>]

On Wed, Jan 22, 2014 at 03:08:55PM -0800, Jim Lieb wrote:
> This is a follow-up agenda topic to the similar topic for LSF-2013.  The goal 
> if this agenda item is to discuss the current status and to coordinate future 
> work in the area of kernel support for file servers such as Samba and NFS-
> Ganesha.  There is work in process based on discussions at the last meeting 
> that can be reported on.
> 
> These issues are very important for the NFS-Ganesha project that with its V2.0 
> release is being used by IBM, Red Hat, Panasas and others as their pNFS 
> server.  These topics do not require presentations other than 1 or 2 slides to 
> keep discussion on topic.  The goal is to clean up the rough edges and issues 
> of current work and focus on near term goals for work still to be done.
> 
> Specifics:
> 
> * New private locks to provide better semantics than Posix locks.  Jeff Layton 
> has been working on this.
> 
> * An extension to inotify() to control event reporting where nfs-ganesha, 
> samba, and local users/processes on the server access the same files.  Jim Lieb 
> has been working on this and has submitted a patchset to the list.
> 
> * Credentials switching to extend nfsd_setuser semantics to user-mode so 
> servers that need to do this operation can use it.  There is an implementation 
> that in its current form still has some issues that need to be resolved based 
> on feedback on the list.
> 
> * readdirplus.  This is a carryover from last year.  Status unknown but the 
> need is still there.
> 
> * rich ACLs.  Some work has been done but this too needs decisions and work.  
> This is especially important to NFSv4.1 and CIFS server projects.
> 
> * Discussions with samba developers on strategies/solutions for mapping 
> credentials between NFSv4.x and SMB.
> 
> I am willing to combine these specific issues with someone else's agenda topic 
> if it makes scheduling simpler.

Ah, if this is on the agenda I'd like to be there to
discuss Samba needs. We're already using pre-thread
creds in Samba, but there are changes it would be
very helpful to have.

Cheers,

	Jeremy.