d34640b0c0
In process of iothread hotplug, qemuDomainHotplugAddIOThread() calls qemuProcessSetupIOThread(). When qemuProcessSetupIOThread() returned a failure, only the cgroup directory 'iothread' was cleaned up within the function. Right after that qemuDomainHotplugAddIOThread() would return failure directly without rolling back the livedef and iothread process that created previously. Further, when 'virsh schedinfo domain --live' requires schedinfo of such machine, the interface will always return a failure print as follows: 'Failed to create v1 controller cpu for group: No such file or directory'. The reason is qemuGetIOThreadsBWLive() using member vm->def->iothreadids[0]->iothread_id to findout the corresponding cgroup dircetory. In case mentioned previously, iothreadids[0] was not been cleaned up while whose cgroup directroy has already been removed. This patch rolls back the livedef and iothread process after qemuProcessSetupIOThread() returned a failure. Of course we are not limited to this function, we also perform the same rolling back after any exception proecss in qemuDomainHotplugAddIOThread(). Signed-off-by: Lei Yang <yanglei209@huawei.com> Signed-off-by: Wang Xin <wangxinxin.wang@huawei.com> Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Michal Privoznik <mprivozn@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:
- libvirt-users@redhat.com (for user discussions)
- libvir-list@redhat.com (for development only)
Further details on contacting the project are available on the website: