From: Greg Banks <gnb@sgi.com>
Subject: ETIMEDOUT in nfsd?
Date: Tue, 3 Aug 2004 18:15:03 +1000
Sender: nfs-admin@lists.sourceforge.net
Message-ID: <20040803081503.GM5581@sgi.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: Linux NFS Mailing List <nfs@lists.sourceforge.net>
To: Neil Brown <neilb@cse.unsw.edu.au>
Errors-To: nfs-admin@lists.sourceforge.net

G'day,

I'm looking at porting to 2.6 the SGI ProPack code for supporting
Hierarchical Storage Managers in nfsd.  Basically, this comprises 
telling the filesystem to do stuff non-blocking at various times
(read, write and setattr) and converting the resulting -EAGAIN
when the HSM has to go out to tape into NFSERR_JUKEBOX to the
client.

So I was somewhat surprised to see that in 2.6, the mapping from
Linux errno to NFS error in fs/nfsd/nfsproc.c:nfserrno() maps
-EAGAIN to nfserr_dropit, causing nfsd_dispatch to just drop the
call and not reply.  Furthermore I need to return the network
error -ETIMEDOUT to get NFSERR_JUKEBOX.  I don't get it...can
someone explain both of these?

Greg.
-- 
Greg Banks, R&D Software Engineer, SGI Australian Software Group.
I don't speak for SGI.


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