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.
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Daniel P. Berrangé 68dc579f43 conf: rewrite filtering for capabilities lookup
The virCapabilitiesDomainDataLookupInternal() is given a list of
parameters representing the desired domain characteristics. It then has
to look throught the capabilities to identify an acceptable match.

The virCapsDomainDataCompare() method is used for filtering out
candidates which don't match the desired criteria. It is called
primarily from the innermost loops and as such is doing many repeated
checks. For example if architcture and os type were checked at the top
level loop the two inner loops could be avoided entirely. If emulator
and domain type were checked in the 2nd level loop the 3rd level loop
can be avoided too.

This change thus removes the virCapsDomainDataCompare() method and puts
suitable checks at the start of each loop to ensure it executes the
minimal number of loop iterations possible. The code becomes clearer to
understand as a nice side-effect.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2018-08-10 12:06:04 +01:00
.gnulib@68df637b5f build: Fix accidental revert of .gnulib update 2018-07-19 16:15:51 -04:00
build-aux po: minimize & canonicalize translations stored in git 2018-04-19 11:11:08 +01:00
docs conf: introduce initiator IQN support for domain disks 2018-08-08 17:33:12 +02:00
examples Forget last daemon/ dir artefacts 2018-07-27 15:44:38 +02:00
gnulib Update to latest gnulib 2018-03-12 11:27:54 +00:00
include/libvirt qemu: Add entry for balloon stat stat-disk-caches 2018-07-16 17:42:23 -04:00
m4 Fix libvirt-driver-libxl check 2018-08-09 14:55:21 -06:00
po po: refresh translations from zanata 2018-07-31 12:34:06 +01:00
src conf: rewrite filtering for capabilities lookup 2018-08-10 12:06:04 +01:00
tests qemuxml2xmloutdata: Use more symlinks 2018-08-10 07:16:03 +02:00
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bootstrap maint: update to latest gnulib 2018-07-14 09:10:03 +02:00
bootstrap.conf virrandom: Make virRandomBits better 2018-06-05 10:31:19 +02:00
cfg.mk cfg.mk: variable initialization when declared with cleanup macro 2018-07-14 17:01:30 +02:00
ChangeLog-old Fix typos in src/* 2014-04-21 16:49:08 -06:00
config-post.h build: remove references to WITH_YAJL for SETUID_RPC_CLIENT 2018-07-18 17:54:18 +02:00
configure.ac storage: Introduce iscsi_direct pool type 2018-08-06 12:23:55 +02:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: Remove control characters from LGPL license file 2015-09-25 09:16:24 +02:00
libvirt-admin.pc.in Add libvirt-admin library 2015-06-16 13:46:20 +02:00
libvirt-lxc.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt-qemu.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
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libvirt.spec.in rpm: simplify applying of patches 2018-08-08 16:28:37 +01:00
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Makefile.nonreentrant Remove backslash alignment attempts 2017-11-03 13:24:12 +01:00
mingw-libvirt.spec.in rpm: add new nwfilter RNGs to mingw-libvirt spec file 2018-07-03 16:32:42 +01:00
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run.in run: Fix LIBVIRTD_PATH 2018-07-24 12:10:21 -04:00

Build Status CII Best Practices

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:

https://libvirt.org

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:

Further details on contacting the project are available on the website:

https://libvirt.org/contact.html