3746a38e7b
When doing block commit we need to allow write for members of the backing chain so that we can commit the data into them. qemuDomainDiskChainElementPrepare was used for this which since commit 786d8d91b4 calls qemuDomainNamespaceSetupDisk which has very adverse side-effects, namely it relabels the nodes to the same label it has in the main namespace. This was messing up permissions for the commit operation since its touching various parts of a single backing chain. Since we are are actually not introducing new images at that point add a flag for qemuDomainDiskChainElementPrepare which will refrain from calling to the namespace setup function. Calls from qemuDomainSnapshotCreateSingleDiskActive and qemuDomainBlockCopyCommon do introduce new members all calls from qemuDomainBlockCommit do not, so the calls are anotated accordingly. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1506072
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 2.1 (or later). See the files COPYING.LESSER
and COPYING for full license terms & conditions.
Installation
Libvirt uses the GNU Autotools build system, so in general can be built and installed with the usual commands. For example, to build in a manner that is suitable for installing as root, use:
$ ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var
$ make
$ sudo make install
While to build & install as an unprivileged user
$ ./configure --prefix=$HOME/usr
$ make
$ make install
The libvirt code relies on a large number of 3rd party libraries. These will
be detected during execution of the configure script and a summary printed
which lists any missing (optional) dependencies.
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: