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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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6b3edda207
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Laine Stump 6b3edda207 util: fix botched check for new netlink request filters 
This is an adjustment to the fix for

  https://bugzilla.redhat.com/show_bug.cgi?id=889319

to account for two bonehead mistakes I made.

commit ac2797cf2a attempted to fix a
problem with netlink in newer kernels requiring an extra attribute
with a filter flag set in order to receive an IFLA_VFINFO_LIST from
netlink. Unfortunately, the #ifdef that protected against compiling it
in on systems without the new flag went a bit too far, assuring that
the new code would *never* be compiled, and even if it had, the code
was incorrect.

The first problem was that, while some IFLA_* enum values are also
their existence at compile time, IFLA_EXT_MASK *isn't* #defined, so
checking to see if it's #defined is not a valid method of determining
whether or not to add the attribute. Fortunately, the flag that is
being set (RTEXT_FILTER_VF) *is* #defined, and it is never present if
IFLA_EXT_MASK isn't, so it's sufficient to just check for that flag.

And to top it off, due to the code not actually compiling when I
thought it did, I didn't realize that I'd been given the wrong arglist
to nla_put() - you can't just send a const value to nla_put, you have
to send it a pointer to memory containing what you want to add to the
message, along with the length of that memory.

This time I've actually sent the patch over to the other machine
that's experiencing the problem, applied it to the branch being used
(0.10.2) and verified that it works properly, i.e. it does fix the
problem it's supposed to fix. :-/
(cherry picked from commit 7c36650699)
2013-01-08 12:44:45 -05:00
.gnulib@dbd914496c build: update to latest gnulib, for secure tarball 2012-07-27 11:52:31 -06:00
daemon daemon: Avoid 'Could not find keytab file' in syslog 2012-10-27 15:28:20 -04:00
docs docs: Fix installation of internals/*.html 2012-10-27 15:33:03 -04:00
examples adding handling EINTR to poll to make it more robust 2012-08-12 21:15:46 -04:00
gnulib build: fix fresh checkout on RHEL5 2012-04-25 16:36:26 -04:00
include snapshot: add atomic create flag 2012-03-23 16:38:20 -06:00
m4 maint: make it easier to copy FORTIFY_SOURCE snippet 2012-06-14 18:38:26 -04:00
po Prep for release 0.9.11.8 2012-12-09 18:20:39 -05:00
python python: fix snapshot listing bugs 2012-06-14 18:38:27 -04:00
src util: fix botched check for new netlink request filters 2013-01-08 12:44:45 -05:00
tests network: prevent dnsmasq from listening on localhost 2012-12-13 12:43:58 -05:00
tools docs: virsh: clarify behavior of send-key 2012-10-27 15:28:32 -04:00
.dir-locals.el maint: let emacs avoid tabs in rng files 2011-08-13 08:56:26 -06:00
.gitignore Add /tools/libvirt-guests.service to .gitignore 2012-08-12 19:22:30 -04:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap qemu: add rbd to whitelist of migration-safe formats 2012-08-12 19:22:51 -04:00
AUTHORS qemu: Do not ignore address for USB disks 2012-12-09 17:48:11 -05:00
autobuild.sh Enable all warnings permanently & default to -Werror for GIT builds 2012-03-27 17:08:06 +01:00
autogen.sh autogen: Always abide --system 2012-08-12 18:34:54 -04:00
bootstrap build: update to latest gnulib, for secure tarball 2012-07-27 11:52:31 -06:00
bootstrap.conf build: update to latest gnulib, for secure tarball 2012-07-27 11:52:31 -06:00
cfg.mk build: update to latest gnulib, for secure tarball 2012-07-27 11:52:31 -06:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac Prep for release 0.9.11.8 2012-12-09 18:20:39 -05:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING Document STREQ_NULLABLE and STRNEQ_NULLABLE 2011-10-06 16:50:38 +02:00
libvirt.pc.in build: silence warning from autoconf 2012-06-14 18:23:21 -04:00
libvirt.spec.in Prep for release 0.9.11.8 2012-12-09 18:20:39 -05:00
Makefile.am maint: add missing copyright notices 2011-07-28 15:01:17 -06:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw32-libvirt.spec.in Fix typos in API XML file paths 2012-02-15 11:29:38 +00:00
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 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>