linux-kernel - Re: 2.6.24-rc3-git4 NFS crossmnt regression

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Message-Id: <200712101619.12522.maximlevitsky@gmail.com>
Date:	Mon, 10 Dec 2007 16:19:12 +0200
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	Neil Brown <neilb@...e.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	gnome42@...il.com, linux-kernel@...r.kernel.org,
	bfields@...ldses.org, "Eric W. Biederman" <ebiederm@...ssion.com>,
	"Denis V. Lunev" <den@...nvz.org>, linux-nfs@...r.kernel.org
Subject: Re: 2.6.24-rc3-git4 NFS crossmnt regression

...
> It is best not to use nohide - we should probably mark it as
> 'legacy'.
> 
> Simply export the top level mountpoint as 'crossmnt'  and everything
> below there will be exported.
> 
> > Where should I put those options in root file-system export or in submount export?
> 
> crossmnt goes at the top.  nohide goes in the submount.  Both have
> the same general effect though with subtle differences.
> You don't need both (though that doesn't hurt).
> Just use crossmnt at the top,  Then you don't need to mention the
> lower level filesystems at all.
> 
> > 
...
> > (I decided to switch to NFS4 only due to the lack of ability to see underlying mounts)
> > 
> 
> All of this should work fine with v3.  Once you have the right patch
> for the crossmnt bug applied, if you have further problems post them
> to linux-nfs@...r.kernel.org.
> 
> NeilBrown
> 

Big thanks,

Still NFS server just don't want to accept the connection
I noticed that if I first mount with
-tnfs, unmount,  and then mount with -tnfs4, it works


Assuming that 
[PATCH 2.6.24-rc4] proc: Remove/Fix proc generic d_revalidate 
is the fix for crossmnt bug, I applied it to both client and server,
but no luck.

Still see empty folders.

my /etc/exports file (on old box):

/ *(insecure,rw,fsid=0,crossmnt,async,anonuid=1000,anongid=100)
/dev *(insecure,rw,fsid=1,async,anonuid=1000,anongid=100)
/mnt/disk2 *(insecure,rw,async,anonuid=1000,anongid=100)
	

It is totally insecure, but I have just home network,
and it is behind firewall, and besides I am testing this now.

I am afraid that I am doing something wrong since
I don't know nfs well yet, and especially nfs4
(But I want to make nfs4 work too)

Best regards,
	Maxim Levitsky
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