0888784f38
Currently, qemuProcessStop() unlocks given domain object right in the middle of cleanup process. This is dangerous because there might be another thread which is executing virDomainObjListAdd(). And since the domain object is on the list of domain objects AND by the time qemuProcessStop() unlocks it the object is also marked as inactive, the other thread acquires the lock and switches vm->def pointer. The unlocking of domain object is needed though, to allow even processing thread finish its queue. Well, the processing can be done before any cleanup is attempted. Therefore, use freshly introduced virEventThreadStop() to join the event thread and drop lock/unlock from the middle of qemuProcessStop(). Now, there's a comment being removed that mentions qemuDomainObjStopWorker() and why it has to be called only after the domain is marked as dead. This comment is no longed applicable because call to qemuDomainObjStopWorker() is removed also. Moreover, priv->beingDestroyed is set to true before unlocking the domain object, thus any event processing callback is going to see the domain being destroyed and can chose to either exit early or finish processing event. Fixes: 3865410e7f67ca4ec66e9a905e75f452762a97f0 Resolves: https://issues.redhat.com/browse/RHEL-49607 Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser
General Public License, version 2.1 (or later). Some parts of the code
that are not part of the C library may have the more restrictive GNU
General Public License, version 2.0 (or later). See the files
COPYING.LESSER and COPYING for full license
terms & conditions.
Installation
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- users@lists.libvirt.org (for user discussions)
- devel@lists.libvirt.org (for development only)
Further details on contacting the project are available on the website: