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Re: [libvirt] [PATCH] Support reporting live interface IP/netmask.

On Mon, 2009-10-05 at 12:02 +0100, Daniel P. Berrange wrote:
> On Tue, Sep 29, 2009 at 04:02:30PM -0400, Laine Stump wrote:
> > From: root <root vlap laine org>
> > 
> > This patch adds the flag VIR_INTERFACE_XML_INACTIVE to
> > virInterfaceGetXMLDesc's flags. When it is *not* set (the default),
> > the live interface info will be returned in the XML. in particular,
> > the IP address(es) and netmask(s) will be retrieved by querying the
> > device directly, rather than just reporting what's in the config
> > file. The backend of this is in netcf's new ncf_if_xml_state()
> > function.
> > 
> > Any live interface ip address info in the xml will have the property
> > "source" set to "device", eg:
> > 
> >          <ip address='' prefix='24' source='device'/>
> This new 'source' attribute is bogus. The fact that the XML is the
> showing the device details, and not the config file details is
> inherent in the fact that we're querying the live interface. This
> distinction applies to the entire XML dump, not just the <ip> tag.

That's what I meant when I said 'I am not sure how this will be used in
practice'. The options for this API call are (1) report configured and
live setup side-by-side in the same XML, and mark the live setup somehow
(e.g., with the source='device' attribute) (2) _only_ report live setup
from this call, if you want configured setup use the

The advantage of (2) is that you can reuse any parsing/processsing code
you might already have for the configured setup variant; the
disadvantage is that you may have to handle the other variant's XML doc,
too, and correlate the two.


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