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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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a2f5e87dce
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Laine Stump a2f5e87dce Revert "qemu: propagate bridge MTU into qemu "host_mtu" option" 
This reverts commit 2841e675.

It turns out that adding the host_mtu field to the PCI capabilities in
the guest bumps the length of PCI capabilities beyond the 32 byte
boundary, so the virtio-net device gets 64 bytes of ioport space
instead of 32, which offsets the address of all the other following
devices. Migration doesn't work very well when the location and length
of PCI capabilities of devices is changed between source and
destination.

This means that we need to make sure that the absence/presence of
host_mtu on the qemu commandline always matches between source and
destination, which means that we need to make setting of host_mtu an
opt-in thing (it can't happen automatically when the bridge being used
has a non-default MTU, which is what commit 2841e675 implemented).

I do want to re-implement this feature with an <mtu auto='on'/>
setting, but probably won't backport that to any stable branches, so
I'm first reverting the original commit, and that revert can be pushed
to the few releases that have been made since the original (3.1.0 -
3.3.0)

Resolves: https://bugzilla.redhat.com/1449346
(cherry picked from commit 77780a29ed)
2017-05-30 18:04:35 -04:00
.gnulib@94386a1366 maint: update to latest gnulib 2017-01-10 12:54:54 -06:00
build-aux prohibit-duplicate-header: print file name and line 2016-06-23 12:48:40 +02:00
daemon daemon: Fix domain name leak in error path 2017-05-10 18:02:38 -04:00
docs docs: Document limitation of maximum vcpu count used with <topology> 2017-05-10 15:14:28 -04:00
examples lib: Introduce event for tracking disk backing file write threshold 2017-03-27 09:29:57 +02:00
gnulib build: drop hack for old mingw ssize_t 2016-07-12 08:57:13 -06:00
include/libvirt lib: Add API for setting the threshold size for VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD 2017-03-27 10:09:49 +02:00
m4 Split out -Wframe-larger-than warning from WARN_CLFAGS 2017-05-10 15:18:38 -04:00
po Prep for release 3.2.1 2017-05-10 18:37:26 -04:00
src Revert "qemu: propagate bridge MTU into qemu "host_mtu" option" 2017-05-30 18:04:35 -04:00
tests qemu: do not crash on USB address with no port and invalid bus 2017-05-10 15:32:04 -04:00
tools man: Align vol-resize arguments with the output of help 2017-05-10 15:31:17 -04:00
.ctags
.dir-locals.el
.gitignore Properly ignore files in build-aux directory 2017-05-10 15:18:38 -04:00
.gitmodules
.mailmap maint: update .mailmap for recent contributions 2015-03-20 06:17:55 -06:00
AUTHORS.in Change maintainers list 2016-02-12 13:10:05 +03:00
autobuild.sh maint: Switch to xz compressed PAX release archives 2016-06-15 18:53:34 +02:00
autogen.sh maint: improve usage of autogen's --no-git 2015-02-06 11:35:29 -07:00
bootstrap maint: update to latest gnulib 2017-01-10 12:54:54 -06:00
bootstrap.conf hvsupport: use a regex instead of XML::XPath 2016-07-19 18:42:44 +02:00
cfg.mk build: Fix syntax check in VPATH 2017-03-27 16:53:18 +02:00
ChangeLog-old
config-post.h m4/virt-devmapper: use LIBVIRT_CHECK_(PKG|LIB) 2016-12-21 15:39:39 +01:00
configure.ac Prep for release 3.2.1 2017-05-10 18:37:26 -04:00
COPYING
COPYING.LESSER maint: Remove control characters from LGPL license file 2015-09-25 09:16:24 +02:00
HACKING Document preferred naming conventions 2017-03-10 11:28:56 +00:00
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 spec: Update version check for maint Source URL 2017-05-10 18:02:40 -04:00
Makefile.am NEWS: Reformat at generation time 2017-01-10 19:37:55 +01:00
Makefile.nonreentrant cfg.mk: use a single regex for all non-reentrant functions 2016-06-15 15:00:56 +02:00
mingw-libvirt.spec.in test: fix screenshot API impl 2016-12-08 10:57:32 +00:00
README
README-hacking
run.in Add PKG_CONFIG_PATH to run.in script. 2014-06-26 14:32:35 +01:00
TODO

README 

         LibVirt : simple API for virtualization

  Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.

Daniel Veillard <veillard@redhat.com>