My sanlock patch has been accepted by the libvirt maintainers today. It will be included in libvirt 0.10.0. It fixes the problem where all sanlock resources are released when hot-dettaching a disk from a qemu/kvm domain, leaving the other (disk) resources unlocked/unprotected.
Meanwhile, this is a situation that can be recovered from through the sanlock client by re-registering the assigned disks, or by avoiding the problem altogether by applying the patch.
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