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Re: [Xen-devel] libxl error reporting

On Thu, 2014-03-06 at 12:11 +0000, Ian Jackson wrote:
> Olaf Hering writes ("libxl error reporting"):
> > For example "virsh migrate" calls libxl_domain_suspend, which has many
> > ways to fail. What details about the specific error should be returned
> > to the caller? Right now its just some sort of libxl_error. All virsh
> > could do is to show "please see logfile for details".
> Unfortunately, yes.

libvirt could also provide its own xtllog implementation which could
store and provide the log messages in a "virsh friendly" manner
(whatever that might be) as well as logging (if it wants).

> > I think this specifc function should return some sort of state, which is
> > preserved within the function call. It could be something like "remote
> > side had issues", "guest was too busy", "guest lacks PV drivers", "some
> > unexpected (internal) error".
> > 
> > Unfortunately libxl.h contains nothing about error handling.
> I have been considering a campaign of adding (many) more error codes.

Good idea.


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