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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Binfeng Wu 8361d335ab mdev: Fix daemon crash when reattaching mdevs on assignment conflict
If there's a list of mdevs to be assigned to a domain, but one of them
(NOT the first) is already assigned to a different domain we're going
to crash in the qemuProcessStop phase in
virMediatedDeviceListFindIndex, because some of the pointers in
mgr->activeMediatedHostdevs are dangling. This is due to
virMediatedDeviceListMarkDevices using cleanup instead of rollback when
we find out that a device is already taken.

Reproducer steps:
1. start vm1 with mdev1
2. start vm2 with mdev2, mdev1 (the order is important!)

Backtrace:
 #0  0x0000ffffb8c36250 in strcmp
 #1  0x0000ffffb9b80754 in virMediatedDeviceListFindIndex
 #2  0x0000ffffb9b80870 in virMediatedDeviceListFind
 #3  0x0000ffffb9c9e168 in virHostdevReAttachMediatedDevices
 #4  0x0000ffff9949f724 in qemuHostdevReAttachMediatedDevices
 #5  0x0000ffff9949f7f8 in qemuHostdevReAttachDomainDevices
 #6  0x0000ffff994bcd70 in qemuProcessStop
 #7  0x0000ffff994bf4e0 in qemuProcessStart

Signed-off-by: Binfeng Wu <wubinfeng@huawei.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
2020-08-04 14:03:54 +02:00
.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 build-aux: add sc_ prefix to more syntax checks 2020-08-03 13:54:15 +02:00
ci meson: update .gitlab-ci.yml file 2020-08-03 09:27:09 +02:00
docs docs: css: Hide redundant 'Contents:' line in table of contents of RST docs 2020-08-03 18:41:11 +02:00
examples meson: examples: build and install example files 2020-08-03 09:27:06 +02:00
include meson: add include directory 2020-08-03 09:26:59 +02:00
po qemu: Separate out namespace handling code 2020-08-03 19:32:27 +02:00
scripts docs: build: Use proper path to file in 'contribute' link 2020-08-03 18:41:11 +02:00
src mdev: Fix daemon crash when reattaching mdevs on assignment conflict 2020-08-04 14:03:54 +02:00
tests Use g_strfeev instead of virStringFreeList 2020-08-03 15:37:36 +02:00
tools util: recommend g_strfreev instead of virStringListFree 2020-08-03 15:37:36 +02:00
.color_coded.in gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
.ctags ctags: Generate tags for headers, i.e. function prototypes 2018-09-18 14:21:33 +02:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.editorconfig Add .editorconfig 2019-09-06 12:47:46 +02:00
.gitignore Ignore clangd-related files and folders 2020-08-03 10:57:47 +02:00
.gitlab-ci.yml ci: Temporarily enable verbose mode for cirrus-run 2020-08-04 13:29:34 +02:00
.gitmodules gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
.gitpublish gitpublish: add a subject prefix 2020-01-16 13:04:11 +00:00
.mailmap mailmap: Remove some duplicates 2019-06-07 13:18:08 +02:00
.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 meson: generate and distribute spec files and AUTHORS 2020-08-03 09:27:06 +02:00
ChangeLog docs: point to GitLab as the primary git hosting 2020-06-03 13:38:33 +02:00
config.h config.h: add a copyright blurb 2020-08-03 13:54:15 +02:00
configmake.h.in meson: generate configmake.h 2020-08-03 09:26:48 +02:00
CONTRIBUTING.rst meson: adjust our documentation to mention meson instead of autoconf 2020-08-03 09:27:09 +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
gitdm.config gitdm: add 'ibm' file 2019-10-18 17:32:52 +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
libvirt.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt.spec.in meson: update spec file to use meson 2020-08-03 09:27:06 +02:00
meson_options.txt meson_options: change default value to auto for driver_esx 2020-08-04 11:25:51 +02:00
meson.build meson: Fix "numaclt" typo 2020-08-04 09:16:01 +02:00
mingw-libvirt.spec.in spec: Require Fedora 31 2020-06-17 12:59:08 +02:00
NEWS.rst Post-release version bump to 6.7.0 2020-08-03 00:21:59 +02:00
README Convert all remaining Markdown files to reStructuredText 2020-04-14 16:29:04 +02:00
README.rst README: drop Travis CI badge 2020-08-03 15:08:28 +02:00
run.in meson: generate run helper 2020-08-03 09:27:06 +02:00

.. image:: https://gitlab.com/libvirt/libvirt/badges/master/pipeline.svg
     :target: https://gitlab.com/libvirt/libvirt/pipelines
     :alt: GitLab CI Build Status
.. image:: https://bestpractices.coreinfrastructure.org/projects/355/badge
     :target: https://bestpractices.coreinfrastructure.org/projects/355
     :alt: CII Best Practices
.. image:: https://translate.fedoraproject.org/widgets/libvirt/-/libvirt/svg-badge.svg
     :target: https://translate.fedoraproject.org/engage/libvirt/
     :alt: Translation status

==============================
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