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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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Michal Privoznik 5a791c8995 qemuDomainBlockStatsFlags: Guard disk lookup with a domain job 
When there are two concurrent threads, we may dereference a NULL
pointer, even though it has been checked before:

1. Thread1: starts executing qemuDomainBlockStatsFlags() with nparams != 0.
            It finds given disk and successfully pass check for disk->info.alias
            not being NULL.
2. Thread2: starts executing qemuDomainDetachDeviceFlags() on the very same
            disk as Thread1 is working on.
3. Thread1: gets to qemuDomainObjBeginJob() where it sets a job on a
            domain.
4. Thread2: also tries to set a job. However, we are not guaranteed which
            thread wins. So assume it's Thread2 who can continue.
5. Thread2: does the actual detach and frees disk->info.alias
6. Thread2: quits the job
7. Thread1: now successfully acquires the job, and accesses a NULL pointer.
2013-03-08 13:09:32 +01:00
.gnulib@819b1c38b9 maint: update to latest gnulib 2013-02-01 09:24:00 -07:00
build-aux Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
daemon libvirt does not logout of iscsi targets, causing system hang on shutdown 2013-03-04 06:28:57 -07:00
docs rng: allow default device in RNG grammar 2013-03-07 07:06:53 -07:00
examples hellolibvirt: Adjust code to use new APIs 2013-03-04 17:36:03 -05:00
gnulib maint: update to latest gnulib 2013-01-02 09:38:30 -07:00
include Introduce virDomainMigrate*CompressionCache APIs 2013-02-22 17:35:59 +01:00
m4 Fix typo in configure.ac causing $LIBS to gain a copy of $CFLAGS 2013-02-05 18:04:16 +00:00
po Release of libvirt 1.0.3 2013-03-05 12:00:53 +08:00
python python: fix fd leak in generator.py 2013-03-01 15:49:07 +08:00
src qemuDomainBlockStatsFlags: Guard disk lookup with a domain job 2013-03-08 13:09:32 +01:00
tests Fix crash parsing RNG device specification 2013-03-07 12:57:10 +00:00
tools Ensure xmlSaveToBuffer is always defined 2013-03-07 18:10:35 +00:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore Add autogenerated lxc_protocol.[ch] to gitignore 2013-02-18 08:57:57 -06:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
AUTHORS.in Add John Ferlan to the committers list 2013-02-05 10:59:32 -05:00
autobuild.sh Switch automated builds to use Mingw64 toolchain instead of Mingw32 2012-06-25 10:41:10 +01:00
autogen.sh build: fix incremental autogen.sh when no AUTHORS is present 2012-12-03 14:59:09 -07:00
bootstrap maint: update to latest gnulib 2013-02-01 09:24:00 -07:00
bootstrap.conf build: more mingw fixes 2013-02-15 15:45:52 -07:00
cfg.mk tests: uniformly report test failures 2013-02-25 17:38:11 -07:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac Release of libvirt 1.0.3 2013-03-05 12:00:53 +08:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING Turn virSecurityManager into a virObjectLockable 2013-02-11 12:33:41 +00:00
libvirt.pc.in build: silence warning from autoconf 2012-05-30 09:22:02 -06:00
libvirt.spec.in Release of libvirt 1.0.3 2013-03-05 12:00:53 +08:00
Makefile.am build: Fix AUTHORS generation 2012-12-17 21:17:55 +01:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw-libvirt.spec.in spec: indent %if to make it easier to see conditions 2013-01-21 10:36:14 -07:00
README
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
run.in run: license as LGPL 2013-02-23 14:03:19 -07:00
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>