f1704e61c3
There is duplicated code between virt drivers that needs to be moved to avoid code repetition. In the case of duplicated code between lxc_cgroup.c and qemu_cgroup.c a common place would be utils/vircgroup.c. The problem is that this would introduce /conf related definitions that shouldn't be imported to vircgroup.c, which is supposed to be a place for utilitary cgroups functions only. And syntax-check would forbid it anyway due to cross-directory includes being used. An alternative would be to overload domain_conf.c, which already contains all the definitions required. But that file is already crowded with XML handling code and we wouldn't do any favors to it by putting more utilitary, non-XML parsing/formatting code there. In [1], Cole suggested a 'domain_cgroup' file to host common code between lxc_cgroup and qemu_cgroup, and Daniel suggested a 'src/hypervisor' dir to host these type of files. This patch introduces src/hypervisor/domain_cgroup.c and, to get started, introduces a new virDomainCgroupSetupBlkio() function to host shared code between virLXCCgroupSetupBlkioTune() and qemuSetupBlkioCgroup(). [1] https://www.redhat.com/archives/libvir-list/2019-December/msg00817.html Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Signed-off-by: Ján Tomko <jtomko@redhat.com> Reviewed-by: Ján Tomko <jtomko@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
Libvirt uses the GNU Autotools build system, so in general can be built and installed with the usual commands, however, we mandate to have the build directory different than the source directory. For example, to build in a manner that is suitable for installing as root, use:
$ mkdir build && cd build
$ ../configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var
$ make
$ sudo make install
While to build & install as an unprivileged user
$ mkdir build && cd build
$ ../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: