[libvirt] [PATCH 2/2] qemu: Add libvirt version check to refresh capabilities algorithm

Daniel P. Berrange berrange at redhat.com
Tue May 26 15:40:23 UTC 2015

On Sat, May 23, 2015 at 10:33:31AM -0400, John Ferlan wrote:
> Rather than an algorithm based solely on libvirtd ctime to refresh the
> capabilities add the element of the libvirt build version into the equation.
> Since that version wouldn't be there prior to this code being run - don't
> fail on reading the capabilities if not found. In this case, the cache
> will always be read when a new libvirt version is installed.

If you upgrade to new libvirt, the file change time should cause us
to invalidate the cache regardless - this version check is jsut a
failsafe, so agree that ignoring missing version is fine. Conversely
though, reporting error on missing version is fine too, as that'll
force us to rebuild the cache.

ACK either way.

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