Re: [Xen-users] hostfs for xen?

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Nils Toedtmann wrote:

> Am Donnerstag, den 19.05.2005, 05:37 -0400 schrieb John A. Sullivan
> III: 
>  
>
> > I have a slightly unusual situation where I need to pass data from one
> > domain to another but, for security reasons, one of the domains will not
> > be on the network.  I would like to pass the data via a shared disk
> > partition.  I would like to know if what I have done is safe.
> >    
> UML has a neat & simple solution for sharing filesystems between the
> guests and the host (that's UML speak, read "between the domUs and
> dom0"): hostfs. The host can assign a "hostfs-root-dir" to a guest; the
> guest may then mount any subdir of that directly into its own filesystem
> (like a bindmount). Read/write operations get mapped to a uid on the
> host (that mapping comes naturally since a UML guest is nothing but a
> process on the host owned by that uid). Hostfs is really cool in
> situations where nfs would be overkill or considered a security risk (i
> admit: i do not know if hostfs actually _is_ more secure than nfs, or -
> if not - if it could be designed in a secure manner. It just appears to
> be more secure due to its simplicity).
>  
I don't know how UML does this but it seems like VMware embeds a version 
of Samba for this purpose.
You could certainly use it to achieve the same goal.

Regards,

Anthony Liguori

> Would such a thing be interesting for xen? Or would that be too evil? I
> really missed hostfs when i switched from UML to xen.
>
> /nils.
>
>
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>  

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