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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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6ea90b843e
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Daniel P. Berrange 6ea90b843e Set a stable & high MAC addr for guest TAP devices on host 
A Linux software bridge will assume the MAC address of the enslaved
interface with the numerically lowest MAC addr. When the bridge
changes MAC address there is a period of network blackout, so a
change should be avoided. The kernel gives TAP devices a completely
random MAC address. Occassionally the random TAP device MAC is lower
than that of the physical interface (eth0, eth1etc) that is enslaved,
causing the bridge to change its MAC.

This change sets an explicit MAC address for all TAP devices created
using the configured MAC from the XML, but with the high byte set
to 0xFE. This should ensure TAP device MACs are higher than any
physical interface MAC.

* src/qemu/qemu_conf.c, src/uml/uml_conf.c: Pass in a MAC addr
  for the TAP device with high byte set to 0xFE
* src/util/bridge.c, src/util/bridge.h: Set a MAC when creating
  the TAP device to override random MAC
2010-07-23 10:15:04 +01:00
.gnulib@1629006348 build: fix some mingw issues 2010-06-10 06:05:31 -06:00
build-aux build: update gnulib 2010-03-26 19:16:37 +01:00
daemon man pages: update authors and copyright notice for libvirtd and virsh 2010-07-17 04:51:01 +10:00
docs Document the memory balloon device 2010-07-21 11:53:56 +01:00
examples Add openauth example to demonstrate a custom auth callback 2010-07-13 13:50:27 +02:00
include libvirt: introduce domainCreateWithFlags API 2010-06-15 07:32:41 -06:00
m4 build: don't use "test cond1 -o cond2": it's not portable 2010-03-25 09:28:24 +01:00
po Release of libvirt-0.8.2 2010-07-05 17:29:25 +02:00
proxy build: fix up some compiler flags 2010-05-17 09:12:42 -06:00
python python: Fix IOErrorReasonCallback bindings 2010-07-14 10:52:18 -04:00
src Set a stable & high MAC addr for guest TAP devices on host 2010-07-23 10:15:04 +01:00
tests Re-arrange PCI device address assignment to match QEMU's default 2010-07-21 11:35:21 +01:00
tools Fix a NULL dereference in the case that the arg in question 2010-07-20 12:51:12 -04:00
.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
.mailmap authors: update my authors details 2010-07-09 23:21:00 +10:00
.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 authors: update my authors details 2010-07-09 23:21:00 +10:00
autobuild.sh autobuild.sh: avoid bashism 2010-06-04 10:03:52 -06:00
autogen.sh build: improve check for out-of-date .gnulib submodule 2010-04-02 15:49:32 -06:00
bootstrap build: fix some mingw issues 2010-06-10 06:05:31 -06:00
bootstrap.conf maint: add gnulib gettimeofday module 2010-06-25 07:46:28 -06:00
cfg.mk build: fix VPATH 'make syntax-check' 2010-06-01 16:34:25 -06:00
ChangeLog-old generate ChangeLog from git logs into distribution tarball 2009-07-08 16:17:51 +02:00
configure.ac Add openauth example to demonstrate a custom auth callback 2010-07-13 13:50:27 +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 man pages: update authors and copyright notice for libvirtd and virsh 2010-07-17 04:51:01 +10:00
Makefile.am Add openauth example to demonstrate a custom auth callback 2010-07-13 13:50:27 +02:00
Makefile.nonreentrant syntax-check: enable prohibit_nonreentrant 2009-02-05 16:28:41 +00:00
mingw32-libvirt.spec.in build: fix some mingw issues 2010-06-10 06:05:31 -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>