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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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dc692438f3
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Boris Fiuczynski dc692438f3 conf: Revert some code to resolve issues for hostdev hotplug 
This patch reverts parts of commits 0d8b24f6b and 0785966d dealing with
the addition of a controller during virDomainHostdevAssignAddress. This
caused a regression for the hostdev hotplug path which assumes the
qemuDomainFindOrCreateSCSIDiskController will add the new controller
during qemuDomainAttachHostSCSIDevice to both the running domain and
the domain def controller list when the controller doesn't yet exist
(whether due to no SCSI controllers existing or the addition of a new
controller because existing ones are full).

Since commit id 0d8b24f6 will call virDomainHostdevAssignAddress during
virDomainDeviceDefPostParseInternal which is called either during domain
definition post processing (via an iterator during virDomainDefPostParse)
or directly from virDomainDeviceDefParse during hotplug, the change
broke the "side effect" of being able to add both a hostdev and controller
to the running domain.

The regression would only be seen if the running domain didn't have a
SCSI controller already defined or if the existing SCSI controller was
"full" of devices and a new controller needed to be created.

This patch will also add some extra comments to the code to avoid a
similar future change.

Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
Reviewed-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>
2015-12-03 11:22:51 -05:00
.gnulib@f39477dba7 maint: update to latest gnulib 2015-06-01 13:23:18 -06:00
build-aux bracket-spacing: Add syntax-check for unnecessary curly brackets 2014-11-14 17:13:36 +01:00
daemon admin: Rename virAdmConnect to virAdmDaemon 2015-12-01 11:44:48 +01:00
docs conf: add XML for input device passthrough 2015-11-30 12:29:03 +01:00
examples apparmor: add missing qemu binaries 2015-11-25 08:35:06 +01:00
gnulib maint: fix date in local gnulib patch 2015-01-05 16:44:10 +00:00
include admin: Rename virAdmConnect to virAdmDaemon 2015-12-01 11:44:48 +01:00
m4 locking: Add io_timeout to sanlock 2015-11-18 10:56:56 +01:00
po conf: Split virDomainObjList into a separate file 2015-11-30 13:55:10 +01:00
src conf: Revert some code to resolve issues for hostdev hotplug 2015-12-03 11:22:51 -05:00
tests tests: Run virnetdaemontest iff WITH_YAJL 2015-12-01 14:03:30 +01:00
tools virsh: remove custom error for cpulist from cmdIOThreadPin 2015-12-03 13:58:52 +01:00
.ctags maint: Make ctags work out of the box 2013-07-18 08:47:21 +02:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore virt-admin: Introduce first working skeleton 2015-11-30 09:44:28 +01:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap maint: update .mailmap for recent contributions 2015-03-20 06:17:55 -06:00
AUTHORS.in AUTHORS: Add myself to the list of committers 2015-10-08 11:48:26 +02:00
autobuild.sh Disable libvirtd by default when building on Win32 2014-04-29 11:30:32 +01:00
autogen.sh maint: improve usage of autogen's --no-git 2015-02-06 11:35:29 -07:00
bootstrap maint: update to latest gnulib 2015-03-26 09:41:55 -06:00
bootstrap.conf bootstrap: Don't require python-config 2015-08-06 14:35:14 +02:00
cfg.mk libvirt: introduce libvirt/libvirt-common.h.in 2015-11-30 09:36:19 +01:00
ChangeLog-old Fix typos in src/* 2014-04-21 16:49:08 -06:00
config-post.h build: fix build of virt-login-shell on systems with older gnutls 2013-10-22 09:41:50 -06:00
configure.ac libvirt: introduce libvirt/libvirt-common.h.in 2015-11-30 09:36:19 +01:00
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
HACKING maint: document use of zanata for translations 2015-06-10 15:26:44 -06:00
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 admin: Distribute libvirt-admin.conf 2015-12-01 11:44:48 +01:00
Makefile.am examples: Add missing build data for 'rename' 2015-09-07 09:00:19 +02:00
Makefile.nonreentrant maint: use LGPL correctly 2013-05-20 14:03:48 -06:00
mingw-libvirt.spec.in parallels: substitute parallels with vz spec file and Makefile 2015-06-17 15:07:55 +03:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking docs: update README-hacking 2014-05-06 16:20:24 -06:00
run.in Add PKG_CONFIG_PATH to run.in script. 2014-06-26 14:32:35 +01:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

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>