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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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Laine Stump 362cab1d53 network: don't wait for IPv6 DAD completion when starting a network 
0f7436ca54 added code during virtual network startup to wait for DAD
(Duplicate Address Detection) to complete if there were any IPv6
addresses on the network. This wait was needed because (according to
the commit log) "created problems when [the "dummy" tap device] is set
to IFF_DOWN prior to DAD completing".

That commit in turn referenced commit db488c7917, which had added the
code to set the dummy tap device IFF_DOWN, commenting "DAD has
happened (dnsmasq waits for it)", and in its commit message pointed
out that if we just got rid of the dummy tap device this wouldn't be
needed.

Now that the dummy tap device has indeed been removed (commit
ee6c936fbb), there is no longer any need to set it IFF_DOWN, and thus
nothing requiring us to wait for DAD to complete. At any rate, with
the dummy tap device removed, leaving nothing else on the bridge when
it is first started, DAD never completes, leading to failure to start
any IPv6 network.

So, yes, this patch removes the wait for DAD completion, and IPv6
networks can once again start, and their associated dnsmasq process
starts successfully (this is the problem that the DAD wait was
originally intended to fix)

Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2020-09-10 11:41:08 -04:00
.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 remote: introduce virt-ssh-helper binary 2020-09-09 16:46:22 +01:00
ci Add FreeBSD 11.4 CI job on Cirrus 2020-09-10 13:11:46 +01:00
docs docs: kbase: Tune how CPU support for SEV should be queried 2020-09-10 15:42:40 +02:00
examples examples: Use GLib event loop impl in events.stp 2020-08-21 11:34:23 +01:00
include qemu: Allow NBD migration over UNIX socket 2020-09-04 10:20:49 +02:00
po remote: introduce virt-ssh-helper binary 2020-09-09 16:46:22 +01:00
scripts libvirt: add stateShutdownPrepare/stateShutdownWait to drivers 2020-09-07 09:33:58 +03:00
src network: don't wait for IPv6 DAD completion when starting a network 2020-09-10 11:41:08 -04:00
tests rpc: use new virt-ssh-helper binary for remote tunnelling 2020-09-09 16:46:22 +01:00
tools virsh: cmdScreenshot: fix cbdata passing to virshStreamSink 2020-09-09 14:37:19 +02:00
.color_coded.in gnulib: delete all gnulib integration 2020-02-07 15:03:54 +00:00
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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 remote: introduce virt-ssh-helper binary 2020-09-09 16:46:22 +01:00
meson_options.txt qemu: Check for changes in qemu modules directory 2020-09-01 14:22:24 -06:00
meson.build Fix linkage to libutil and libkvm on FreeBSD 11 2020-09-10 13:11:46 +01:00
mingw-libvirt.spec.in spec: Require Fedora 31 2020-06-17 12:59:08 +02:00
NEWS.rst Revert "news: qemu: Support TLS for NBD connections for pull mode backup" 2020-09-08 08:05:23 +02:00
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README.rst

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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:

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

https://libvirt.org/contact.html