Re: [Xen-devel] use case for exposing xenstore attributes via sysfs [long]

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 23 Feb 2006, at 04:39, Anthony Liguori wrote:

> It would also solve the general problem too.  There's a really 
> interesting article on LWN right now about sysfs being part of the 
> Linux userspace ABI.  If we expose parts of XenStore that aren't 
> frozen (all of the Xend stuff which includes UUID isn't frozen) via 
> sysfs then it would be wrong to ever change those things.
> I think you could write up a pretty simple module that provided this 
> for domUs.  Would having a simpler kernel interface for XenBus be 
> acceptable?   We could just change xenstore-* to use that interface 
> and get rid of xenstore_domain_open() (is anyone actually using this 
> interface anywhere else?).
It gets harder if anyone wants to construct transactions or register 
watches from user space. We could support both interfaces though 
(simple restricted, and complex flexible).
 -- Keir


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