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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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Jim Fehlig ba196952f5 Fix race in finding available vnc port 
The qemu driver contains a subtle race in the logic to find next
available vnc port.  Currently it iterates through all available ports
and returns the first for which bind(2) succeeds.  However it is possible
that a previously issued port has not yet been bound by qemu, resulting
in the same port used for a subsequent domain.

This patch addresses the race by using a simple bitmap to "reserve" the
ports allocated by libvirt.

V2:
  - Put port bitmap in struct qemud_driver
  - Initialize bitmap in qemudStartup

V3:
  - Check for failure of virBitmapGetBit
  - Additional check for port != -1 before calling virbitmapClearBit

V4:
  - Check for failure of virBitmap{Set,Clear}Bit
2010-05-21 11:29:03 -06:00
.gnulib@28e58203a7 build: update gnulib 2010-05-11 10:03:48 -06:00
build-aux build: update gnulib 2010-03-26 19:16:37 +01:00
daemon daemon: Export SDL audio environment variables 2010-05-21 12:48:34 -04:00
docs maint: don't mark VIR_DEBUG or VIR_DEBUG0 diagnostics for translation 2010-05-20 21:36:26 +02:00
examples nwfilter: let qemu's after-migration packet pass 2010-04-27 14:50:35 -04:00
include note a typo: VIR_MIGRATE_TUNNELLED should be VIR_MIGRATE_TUNNELED, 2010-05-19 08:08:52 +02:00
m4 build: don't use "test cond1 -o cond2": it's not portable 2010-03-25 09:28:24 +01:00
po maint: update po/POTFILES.in 2010-05-20 21:36:26 +02:00
proxy build: fix up some compiler flags 2010-05-17 09:12:42 -06:00
python Fix up the python bindings for snapshotting. 2010-05-20 13:49:38 -04:00
src Fix race in finding available vnc port 2010-05-21 11:29:03 -06:00
tests Domain snapshot RNG and tests. 2010-05-20 13:50:03 -04:00
tools Add VIR_STORAGE_POOL_INACCESSIBLE to denote inaccessible storage pools 2010-05-18 01:34:34 +02:00
.gitignore build: distribute missing file 2010-05-19 16:28:49 -06:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.hgignore Add qemuhelptest to .*ignore files 2009-06-16 14:06:48 +00:00
.x-sc_avoid_ctype_macros exempt gnulib from ctype-macros prohibition 2008-10-28 17:36:31 +00:00
.x-sc_avoid_if_before_free avoid a "make syntax-check" failure 2009-07-09 20:00:37 +02:00
.x-sc_avoid_write Fully asynchronous monitor I/O processing 2009-11-10 13:27:18 +00:00
.x-sc_m4_quote_check syntax-check: enable more checks 2009-02-03 13:08:36 +00:00
.x-sc_prohibit_always_true_header_tests build: update gnulib 2010-05-06 14:35:38 -06:00
.x-sc_prohibit_asprintf add .x-sc_prohibit_asprintf 2008-12-23 13:40:42 +00:00
.x-sc_prohibit_gethostby Various syntax-check fixes. 2009-10-26 10:34:05 +01:00
.x-sc_prohibit_gethostname Add a new syntax-check rule for gethostname. 2009-10-26 10:34:27 +01:00
.x-sc_prohibit_gettext_noop build: fix syntax-check problems 2010-04-12 16:43:05 -06:00
.x-sc_prohibit_have_config_h maint: sync from coreutils 2009-01-29 18:06:19 +00:00
.x-sc_prohibit_HAVE_MBRTOWC maint: sync from coreutils 2009-01-29 18:06:19 +00:00
.x-sc_prohibit_nonreentrant Tighten up nonreentrant syntax-check. 2009-10-26 10:33:42 +01:00
.x-sc_prohibit_readlink Add a rule to check for uses of readlink. 2010-01-22 09:42:35 -05:00
.x-sc_prohibit_strcmp exempt gnulib/ from "make syntax-check" strcmp prohibition 2008-05-14 21:18:27 +00:00
.x-sc_prohibit_strcmp_and_strncmp Ignore docs/ directory for strcmp() syntax check 2009-11-23 11:58:13 +00:00
.x-sc_prohibit_strncpy Various syntax-check fixes. 2009-10-26 10:34:05 +01:00
.x-sc_prohibit_test_minus_ao build: fix syntax-check problems 2010-04-12 16:43:05 -06:00
.x-sc_prohibit_VIR_ERR_NO_MEMORY Various syntax-check fixes. 2009-10-26 10:34:05 +01:00
.x-sc_require_config_h Various syntax-check fixes. 2009-10-26 10:34:05 +01:00
.x-sc_require_config_h_first Misc syntax-check fixes 2009-09-21 14:41:47 +01:00
.x-sc_trailing_blank build: exempt *.ico files from the trailing blank check 2008-10-16 13:28:07 +00:00
.x-sc_unmarked_diagnostics build: import latest gnulib 2010-04-02 10:18:55 -06:00
acinclude.m4 build: fix up some compiler flags 2010-05-17 09:12:42 -06:00
AUTHORS maint: update AUTHORS 2010-04-23 07:48:10 -06:00
autobuild.sh autobuild.sh: provide default prefix 2010-04-30 11:13:06 -06:00
autogen.sh build: improve check for out-of-date .gnulib submodule 2010-04-02 15:49:32 -06:00
bootstrap maint: relax git minimum version 2010-02-24 14:29:27 -05:00
bootstrap.conf build: update gnulib 2010-05-11 10:03:48 -06:00
cfg.mk Add simple bitmap operations to utils 2010-05-21 11:29:03 -06:00
ChangeLog-old generate ChangeLog from git logs into distribution tarball 2009-07-08 16:17:51 +02:00
configure.ac build: avoid compile failure on linux kernels older than 2.6.19 2010-05-17 16:50:36 +02:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING docs: hacking: explain why using curly braces well is important 2010-05-04 15:41:21 +02:00
libvirt.pc.in * libvirt.pc.in: applied patch from Daniel Berrange to fix --cflags 2006-03-24 13:18:12 +00:00
libvirt.spec.in Init script for handling guests on shutdown/boot 2010-05-21 09:33:30 +02:00
Makefile.am build: fix syntax-check problems 2010-04-12 16:43:05 -06:00
Makefile.nonreentrant syntax-check: enable prohibit_nonreentrant 2009-02-05 16:28:41 +00:00
mingw32-libvirt.spec.in mingw32-libvirt.spec: bring up to date 2010-05-07 13:11:25 -06:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
TODO Remove all trailing blanks; turn on the rule to detect them. 2008-02-05 19:27:37 +00:00

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>