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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.
b999ce97f3
Undefine procedure drops domain lock while waiting for detaching disks vz sdk call. Meanwhile vz sdk event domain-config-changed arrives, its handler finds domain and is blocked waiting for job condition. After undefine API call finishes event processing procedes and tries to refreshes domain config thru existing vz sdk domain handle. Domain does not exists anymore and event processing fails. Everything is fine we just don't want to see error message in log for this particular case. Fortunately domain has flag that domain is removed from list. This also imply that vz sdk domain is also undefined. Thus if we check for this flag right after domain is locked again on accuiring job condition we gracefully handle this situation. Actually the race can happen in other situations too. Any time we wait for job condition in mutualy exclusive job in time when we acquire it vz sdk domain can cease to exist. So instead of general internal error we can return domain not found which is easier to handle. We don't need to patch other places in mutually exclusive jobs where domain lock is dropped as if job is started domain can't be undefine by mutually exclusive undefine job. The code of this patch is quite similar to qemu driver checks for is domain is active after acquiring a job. The difference only while qemu domain is operational while process is active vz domain is operational while domain exists. |
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| .gnulib@68b6adebef | ||
| build-aux | ||
| daemon | ||
| docs | ||
| examples | ||
| gnulib | ||
| include/libvirt | ||
| m4 | ||
| po | ||
| src | ||
| tests | ||
| tools | ||
| .ctags | ||
| .dir-locals.el | ||
| .gitignore | ||
| .gitmodules | ||
| .mailmap | ||
| AUTHORS.in | ||
| autobuild.sh | ||
| autogen.sh | ||
| bootstrap | ||
| bootstrap.conf | ||
| cfg.mk | ||
| ChangeLog-old | ||
| config-post.h | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LESSER | ||
| HACKING | ||
| libvirt-admin.pc.in | ||
| libvirt-lxc.pc.in | ||
| libvirt-qemu.pc.in | ||
| libvirt.pc.in | ||
| libvirt.spec.in | ||
| Makefile.am | ||
| Makefile.nonreentrant | ||
| mingw-libvirt.spec.in | ||
| README | ||
| README-hacking | ||
| run.in | ||
| TODO | ||
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>