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Currently, if sanlock is already registering a lockspace other libvirtd instances (from other hosts) obtain -EINPROGRESS. On sufficiently new sanlock, sanlock_inq_lockspace() is called, which suspend execution until lockspace state is changed. With current libvirt implementation, we fail to retry adding the lockspace again but continue in error path. Therefore we produce meaningless error message: virLockManagerSanlockSetupLockspace:363 : Unable to add lockspace /var/lib/libvirt/sanlock/__LIBVIRT__DISKS__: Success qemudLoadDriverConfig:558 : Failed to load lock manager sanlock We should try to re-add the lockspace after its state change to be sure it was added successfully. In fact, with sufficiently new sanlock we can just avoid dummy usleep() which is used if there's no inquire API.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>