Libvirt SMB volume driver: fail to attach volume

[Lucian Petrut]

The Libvirt SMB volume driver fails to attach volumes if the connection info does not contain mount options.

The reason is that the mount options are not parsed correctly. It attempts to join the connection info mount options (which in this case are set to None) with the locally configured mount options.

Trace: http://paste.openstack.org/show/197179/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/168401

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/168401
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=872dc5f6aff284a6f8d89b192362740bf03a36bb
Submitter: Jenkins
Branch: master

commit 872dc5f6aff284a6f8d89b192362740bf03a36bb
Author: Lucian Petrut <email address hidden>
Date: Fri Mar 27 18:09:49 2015 +0200

    Libvirt SMB volume driver: fix volume attach

    The Libvirt SMB volume driver fails to attach volumes if the
    connection info does not contain mount options.

    The reason is that the mount options are not parsed correctly.
    It attempts to join the connection info mount options (which in
    this case are set to None) with the locally configured mount
    options.

    This patch handles the case when the mount options are set to None.

    Change-Id: I3166ef5420409ad45cf64f04e6c1d30b6c674d20
    Closes-Bug: #1437389