[libvirt] backingStore info adding late breaks virt-aa-helper

[Peter Krempa]

On Tue, Jul 18, 2017 at 08:57:36 +0200, Christian Ehrhardt wrote:
> On Mon, Jul 17, 2017 at 8:40 PM, Christian Ehrhardt <
> christian.ehrhardt at canonical.com> wrote:
> 
> >
> >
> > On Mon, Jul 17, 2017 at 8:17 PM, Christian Ehrhardt <
> > christian.ehrhardt at canonical.com> wrote:
> >>
> >> So it is the parsing of the XML into objects I have to track down.
> >> Maybe it is even some Ubuntu Delta that no more correctly matches.
> >> Will run on build from upstream master as well before next report.
> >>
> >
> > Ok, I was able to confirm with latest upstream master which rules out
> > Ubuntu apparmor delta as the source of the issue.
> > But I can build and run to check so worst case I can bisect it now.
> >
> 
> This becomes a monologue :-/
> Bisect found the breaking change to be in:
> 
> f813fe810fc3f0ce839f450e662e0173d40a5ce1 is the first bad commit
> commit f813fe810fc3f0ce839f450e662e0173d40a5ce1
> Author: Peter Krempa <pkrempa at redhat.com>
> Date:   Fri Jan 13 16:50:11 2017 +0100
> 
>    storage: backend: Refactor registration of the backend drivers
> 
>    Add APIs that allow to dynamically register driver backends so that the
>    list of available drivers does not need to be known during compile time.
> 
>    This will allow us to modularize the storage driver on runtime.
> 
> 
> I'll try to debug in more detail how/where it broke it, but since this is a
> rather huge refactor and not a small change this might take a while. Any
> hints still welcome.


Hmmm, in that case probably the registration of the storage driver APIs
in the aa-helper does not take place properly, and thus the detection of
the backing chain will be wrong.

I'll have a look
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