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Daniel P. Berrangé 66ce769d27 qemu: don't continue loading caps if outdated
The XML format used for QEMU capabilities is not required to be
stable across releases, as we invalidate the cache whenever the
libvirt binary changes.

We none the less always try to parse te entire XML file before
we do any validity checks. Thus if we change the format of any
part of the data, or change permitted values for enums, then
libvirtd logs will be spammed with errors.

These are not in fact errors, but an expected scenario.

This change makes the loading code validate the cache timestamp
against the libvirtd timestamp immediately. If they don't match
then we stop loading the rest of the XML file.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2020-06-23 17:33:30 +01:00
.ctags.d maint: Add support for .ctags.d 2019-05-31 17:54:28 +02:00
.github github: skip lockdown of old issues/prs 2020-04-07 17:50:54 +01:00
build-aux nodedev: Add testing for 'mdevctl start' 2020-06-19 10:39:55 +02:00
ci ci: Drop mips container for Debian sid 2020-06-23 12:14:00 +02:00
docs docs: Document recent hook script extension 2020-06-23 18:34:20 +02:00
examples qemu: support Panic Crashloaded event handling 2020-02-07 14:05:25 +00:00
include/libvirt API: Add VIR_DOMAIN_JOB_ERRMSG domain job statistics field 2020-04-24 08:56:57 +02:00
m4 nodedev: add mdev support to virNodeDeviceCreateXML() 2020-06-19 10:39:55 +02:00
po Update translation files 2020-06-17 12:59:44 +02:00
scripts news: Convert to reStructuredText 2020-06-05 16:27:33 +02:00
src qemu: don't continue loading caps if outdated 2020-06-23 17:33:30 +01:00
tests qemu: don't continue loading caps if outdated 2020-06-23 17:33:30 +01:00
tools virsh: cmdBlock*: Remove 'error:' prefix for an empty line 2020-06-22 17:22:03 +02:00
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.gitpublish gitpublish: add a subject prefix 2020-01-16 13:04:11 +00:00
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.ycm_extra_conf.py.in gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
ABOUT-NLS Convert all remaining Markdown files to reStructuredText 2020-04-14 16:29:04 +02:00
AUTHORS.in AUTHORS: Add Fabiano Fidêncio 2019-12-19 16:42:06 +01:00
autogen.sh autogen.sh: Restore --no-git (avoid git submodule update) 2020-06-03 16:19:13 +02:00
ChangeLog docs: point to GitLab as the primary git hosting 2020-06-03 13:38:33 +02:00
config-post.h gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
configure.ac maint: Post-release version bump to 6.5.0 2020-06-02 11:20:16 +02:00
CONTRIBUTING.rst CONTRIBUTING: Include note about build system tools 2020-05-04 19:03:51 +02:00
COPYING
COPYING.LESSER maint: Remove control characters from LGPL license file 2015-09-25 09:16:24 +02:00
gitdm.config gitdm: add 'ibm' file 2019-10-18 17:32:52 +02:00
GNUmakefile build: merge all syntax-check logic into one file 2019-10-09 13:36:54 +01:00
libvirt-admin.pc.in
libvirt-lxc.pc.in
libvirt-qemu.pc.in
libvirt.pc.in
libvirt.spec.in nodedev: add mdev support to virNodeDeviceCreateXML() 2020-06-19 10:39:55 +02:00
Makefile.am news: Convert to reStructuredText 2020-06-05 16:27:33 +02:00
Makefile.nonreentrant Remove backslash alignment attempts 2017-11-03 13:24:12 +01:00
mingw-libvirt.spec.in spec: Require Fedora 31 2020-06-17 12:59:08 +02:00
NEWS.rst news: Document recent hook script extension 2020-06-23 18:37:52 +02:00
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README.rst po: update docs to refer to Weblate instead of Zanata 2020-06-08 16:38:47 +01:00
run.in run.in: Include tools directory on $PATH. 2020-01-21 13:04:57 +01:00

.. image:: https://gitlab.com/libvirt/libvirt/badges/master/pipeline.svg
     :target: https://gitlab.com/libvirt/libvirt/pipelines
     :alt: GitLab CI Build Status
.. image:: https://travis-ci.org/libvirt/libvirt.svg
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     :alt: Travis CI Build Status
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==============================
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 2.0 (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:

https://libvirt.org/contact.html