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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 cf976d9dcf qemu: Label all TAP FDs 
https://bugzilla.redhat.com/show_bug.cgi?id=1095636

When starting up the domain the domain's NICs are allocated. As of
1f24f682 (v1.0.6) we are able to use multiqueue feature on virtio
NICs. It breaks network processing into multiple queues which can be
processed in parallel by different host CPUs. The queues are, however,
created by opening /dev/net/tun several times. Unfortunately, only the
first FD in the row is labelled so when turning the multiqueue feature
on in the guest, qemu will get AVC denial. Make sure we label all the
FDs needed.

Moreover, the default label of /dev/net/tun doesn't allow
attaching a queue:

    type=AVC msg=audit(1399622478.790:893): avc:  denied  { attach_queue }
    for  pid=7585 comm="qemu-kvm"
    scontext=system_u:system_r:svirt_t:s0:c638,c877
    tcontext=system_u:system_r:virtd_t:s0-s0:c0.c1023
    tclass=tun_socket

And as suggested by SELinux maintainers, the tun FD should be labeled
as svirt_t. Therefore, we don't need to adjust any range (as done
previously by Guannan in ae368ebf) rather set the seclabel of the
domain directly.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-08-20 09:42:24 +02:00
.gnulib@2d280742a9 build: fix gnulib build for mingw 2014-07-09 16:09:17 -06:00
build-aux maint: improve syntax check for space around = 2014-08-12 11:21:17 -06:00
daemon daemon: Fix driver registration ordering 2014-08-18 11:49:10 +02:00
docs docs: nwfilter: add missing dscp attribute 2014-08-19 11:54:35 +02:00
examples domtop: Remove unused variable 2014-08-04 14:40:52 +02:00
gnulib maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
include storage: ZFS support 2014-08-12 19:40:20 +04:00
m4 build: prefer -fstack-protector-strong to -all 2014-06-12 08:16:03 +02:00
po src/xenconfig: move common parsing/formatting to xen_common 2014-08-18 20:47:38 -06:00
src qemu: Label all TAP FDs 2014-08-20 09:42:24 +02:00
tests bhyve: add volumes support 2014-08-19 20:50:22 +04:00
tools virsh: Fix comment for net-undefine 2014-08-19 15:14:32 +02:00
.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 examples: Introduce domtop 2014-07-18 16:39:54 +02:00
.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 Added myself in AUTHORS.in 2014-07-23 16:23:46 +02:00
autobuild.sh Disable libvirtd by default when building on Win32 2014-04-29 11:30:32 +01:00
autogen.sh maint: detect VPATH builds when checking for gnulib update 2014-06-04 16:06:55 -06:00
bootstrap maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
bootstrap.conf Add helpers for getting env vars in a setuid environment 2013-10-21 14:03:52 +01:00
cfg.mk xen: rename xenxs to xenconfig 2014-08-18 20:36:24 -06:00
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 xen: rename xenxs to xenconfig 2014-08-18 20:36:24 -06:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
HACKING docs: Fix broken link in the HACKING page 2014-07-04 18:28:24 +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 build: force configure failed when perl is missing 2014-08-14 11:28:18 +02:00
Makefile.am examples: Introduce domtop 2014-07-18 16:39:54 +02:00
Makefile.nonreentrant maint: use LGPL correctly 2013-05-20 14:03:48 -06:00
mingw-libvirt.spec.in build: package .pc files for mingw64 2014-07-09 16:45:15 -06:00
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>