NFS export of a squashfs

Gabriel Winckler winckler at
Mon Mar 23 17:16:51 UTC 2009

Hi Phillip,

Thank you very much for this elaborate trace.

I will recompile the kernel in the next couple of days. For now I'm using
the unfs3 server.

Isn't this a case for opening a bug for the kernel team?

I would suggest to update the squash patch and enable the exports.
I also would like to have the aufs module compiled this exports enable by

Anyone have suggestions on how accomplish this? A launchpad bug or submit a
patch is the best way of contact the kernel team?



> Exporting Squashfs via NFS should work.  Unfortunately after checking
> Ubuntu's
> kernels (9.04 and 8.10) the reason it doesn't work is clear.  Ubuntu has
> the
> export code in Squashfs in their kernels disabled,..
> Why?  It's because Ubuntu are using an older version of Squashfs (3.3)
> originally written for kernels 2.6.24 and older, which they have
> incompletely
> forward ported to later kernel versions.  Unfortunately the NFS export
> interface
> changed in kernels 2.6.25 and later, which means export code written for
> 2.6.24
> and earlier kernels no longer works.  Evidently rather than forward port
> the NFS
> export code to later kernels they have disabled it.
> Phillip
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