diff --git a/lib/nova_plugins/functions-libvirt b/lib/nova_plugins/functions-libvirt
new file mode 100644
index 0000000..adffe01
--- /dev/null
+++ b/lib/nova_plugins/functions-libvirt
@@ -0,0 +1,125 @@
+# lib/nova_plugins/functions-libvirt
+# Common libvirt configuration functions
+
+# Dependencies:
+# ``functions`` file
+# ``STACK_USER`` has to be defined
+
+# Save trace setting
+LV_XTRACE=$(set +o | grep xtrace)
+set +o xtrace
+
+# Defaults
+# -------
+
+# if we should turn on massive libvirt debugging
+DEBUG_LIBVIRT=$(trueorfalse False $DEBUG_LIBVIRT)
+
+# Installs required distro-specific libvirt packages.
+function install_libvirt {
+    if is_ubuntu; then
+        install_package kvm
+        install_package libvirt-bin
+        install_package python-libvirt
+        install_package python-guestfs
+    elif is_fedora || is_suse; then
+        install_package kvm
+        install_package libvirt
+        install_package libvirt-python
+        install_package python-libguestfs
+    fi
+}
+
+# Configures the installed libvirt system so that is accessible by
+# STACK_USER via qemu:///system with management capabilities.
+function configure_libvirt {
+    if is_service_enabled neutron && is_neutron_ovs_base_plugin && ! sudo grep -q '^cgroup_device_acl' $QEMU_CONF; then
+        # Add /dev/net/tun to cgroup_device_acls, needed for type=ethernet interfaces
+        cat <<EOF | sudo tee -a $QEMU_CONF
+cgroup_device_acl = [
+    "/dev/null", "/dev/full", "/dev/zero",
+    "/dev/random", "/dev/urandom",
+    "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
+    "/dev/rtc", "/dev/hpet","/dev/net/tun",
+]
+EOF
+    fi
+
+    if is_ubuntu; then
+        LIBVIRT_DAEMON=libvirt-bin
+    else
+        LIBVIRT_DAEMON=libvirtd
+    fi
+
+    if is_fedora || is_suse; then
+        if is_fedora && [[ $DISTRO =~ (rhel6) || "$os_RELEASE" -le "17" ]]; then
+            cat <<EOF | sudo tee /etc/polkit-1/localauthority/50-local.d/50-libvirt-remote-access.pkla
+[libvirt Management Access]
+Identity=unix-group:$LIBVIRT_GROUP
+Action=org.libvirt.unix.manage
+ResultAny=yes
+ResultInactive=yes
+ResultActive=yes
+EOF
+        elif is_suse && [[ $os_RELEASE = 12.2 || "$os_VENDOR" = "SUSE LINUX" ]]; then
+            # openSUSE < 12.3 or SLE
+            # Work around the fact that polkit-default-privs overrules pklas
+            # with 'unix-group:$group'.
+            cat <<EOF | sudo tee /etc/polkit-1/localauthority/50-local.d/50-libvirt-remote-access.pkla
+[libvirt Management Access]
+Identity=unix-user:$STACK_USER
+Action=org.libvirt.unix.manage
+ResultAny=yes
+ResultInactive=yes
+ResultActive=yes
+EOF
+        else
+            # Starting with fedora 18 and opensuse-12.3 enable stack-user to
+            # virsh -c qemu:///system by creating a policy-kit rule for
+            # stack-user using the new Javascript syntax
+            rules_dir=/etc/polkit-1/rules.d
+            sudo mkdir -p $rules_dir
+            cat <<EOF | sudo tee $rules_dir/50-libvirt-$STACK_USER.rules
+polkit.addRule(function(action, subject) {
+    if (action.id == 'org.libvirt.unix.manage' &&
+        subject.user == '$STACK_USER') {
+        return polkit.Result.YES;
+    }
+});
+EOF
+            unset rules_dir
+        fi
+    fi
+
+    # The user that nova runs as needs to be member of **libvirtd** group otherwise
+    # nova-compute will be unable to use libvirt.
+    if ! getent group $LIBVIRT_GROUP >/dev/null; then
+        sudo groupadd $LIBVIRT_GROUP
+    fi
+    add_user_to_group $STACK_USER $LIBVIRT_GROUP
+
+    # Enable server side traces for libvirtd
+    if [[ "$DEBUG_LIBVIRT" = "True" ]] ; then
+        local log_filters="1:libvirt 1:qemu 1:conf 1:security 3:event 3:json 3:file 1:util"
+        local log_outputs="1:file:/var/log/libvirt/libvirtd.log"
+        if ! grep -q "log_filters=\"$log_filters\"" /etc/libvirt/libvirtd.conf; then
+            echo "log_filters=\"$log_filters\"" | sudo tee -a /etc/libvirt/libvirtd.conf
+        fi
+        if ! grep -q "log_outputs=\"$log_outputs\"" /etc/libvirt/libvirtd.conf; then
+            echo "log_outputs=\"$log_outputs\"" | sudo tee -a /etc/libvirt/libvirtd.conf
+        fi
+    fi
+
+    # libvirt detects various settings on startup, as we potentially changed
+    # the system configuration (modules, filesystems), we need to restart
+    # libvirt to detect those changes.
+    restart_service $LIBVIRT_DAEMON
+}
+
+
+# Restore xtrace
+$LV_XTRACE
+
+# Local variables:
+# mode: shell-script
+# End: