Fix overlapping block device names
This was caused by a change in Jinja template engine that breaks
assignments like {% set i = i + 1 %} in a loop.
Jinja 2.10 introduces a "namespace" object for this use case, but
unfortunately dom0-fc25 uses 2.8.1.
See:
https://github.com/pallets/jinja/issues/641
https://github.com/pallets/jinja/pull/684
Fixes QubesOS/qubes-issues#5551.
This commit is contained in:
Pawel Marczewski
parent
686f66bb85
commit
fe72fe1681
@ -1469,6 +1469,150 @@ class TC_90_QubesVM(QubesVMTestsMixin, qubes.tests.QubesTestCase):
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extra_ip='<ip address="{}::a89:1" family=\'ipv6\'/>'.format(
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qubes.config.qubes_ipv6_prefix.replace(':0000', '')))))
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def test_615_libvirt_xml_block_devices(self):
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expected = '''<domain type="xen">
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<name>test-inst-test</name>
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<uuid>7db78950-c467-4863-94d1-af59806384ea</uuid>
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<memory unit="MiB">400</memory>
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<currentMemory unit="MiB">400</currentMemory>
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<vcpu placement="static">2</vcpu>
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<cpu mode='host-passthrough'>
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<!-- disable nested HVM -->
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<feature name='vmx' policy='disable'/>
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<feature name='svm' policy='disable'/>
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<!-- disable SMAP inside VM, because of Linux bug -->
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<feature name='smap' policy='disable'/>
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</cpu>
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<os>
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<type arch="x86_64" machine="xenfv">hvm</type>
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<!--
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For the libxl backend libvirt switches between OVMF (UEFI)
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and SeaBIOS based on the loader type. This has nothing to
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do with the hvmloader binary.
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-->
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<loader type="rom">hvmloader</loader>
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<boot dev="cdrom" />
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<boot dev="hd" />
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</os>
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<features>
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<pae/>
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<acpi/>
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<apic/>
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<viridian/>
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</features>
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<clock offset="variable" adjustment="0" basis="localtime" />
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>destroy</on_reboot>
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<on_crash>destroy</on_crash>
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<devices>
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<disk type="block" device="disk">
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<driver name="phy" />
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<source dev="/dev/loop0" />
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<target dev="xvda" />
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<backenddomain name="dom0" />
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<script path="/tmp/script" />
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</disk>
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<disk type="block" device="disk">
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<driver name="phy" />
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<source dev="/dev/loop1" />
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<target dev="xvde" />
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<backenddomain name="dom0" />
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</disk>
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<disk type="block" device="disk">
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<driver name="phy" />
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<source dev="/dev/loop2" />
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<target dev="xvdf" />
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<backenddomain name="dom0" />
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</disk>
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<disk type="block" device="disk">
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<driver name="phy" />
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<source dev="/dev/sdb" />
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<target dev="xvdl" />
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</disk>
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<disk type="block" device="cdrom">
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<driver name="phy" />
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<source dev="/dev/sda" />
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<!-- prefer xvdd for CDROM -->
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<target dev="xvdd" />
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</disk>
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<disk type="block" device="disk">
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<driver name="phy" />
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<source dev="/dev/loop0" />
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<target dev="xvdi" />
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<backenddomain name="backend0" />
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</disk>
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<disk type="block" device="disk">
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<driver name="phy" />
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<source dev="/dev/loop0" />
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<target dev="xvdj" />
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<backenddomain name="backend1" />
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</disk>
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<!-- server_ip is the address of stubdomain. It hosts it's own DNS server. -->
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<emulator type="stubdom-linux" />
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<input type="tablet" bus="usb"/>
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<video>
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<model type="vga"/>
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</video>
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<graphics type="qubes"/>
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<console type="pty">
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<target type="xen" port="0"/>
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</console>
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</devices>
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</domain>
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'''
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my_uuid = '7db78950-c467-4863-94d1-af59806384ea'
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vm = self.get_vm(uuid=my_uuid)
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vm.netvm = None
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vm.virt_mode = 'hvm'
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vm.volumes['root'] = unittest.mock.Mock(**{
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'block_device.return_value.name': 'root',
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'block_device.return_value.path': '/dev/loop0',
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'block_device.return_value.devtype': 'disk',
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'block_device.return_value.domain': 'dom0',
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'block_device.return_value.script': '/tmp/script',
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})
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vm.volumes['other'] = unittest.mock.Mock(**{
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'block_device.return_value.name': 'other',
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'block_device.return_value.path': '/dev/loop1',
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'block_device.return_value.devtype': 'disk',
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'block_device.return_value.domain': 'dom0',
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'block_device.return_value.script': None,
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})
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vm.volumes['other2'] = unittest.mock.Mock(**{
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'block_device.return_value.name': 'other',
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'block_device.return_value.path': '/dev/loop2',
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'block_device.return_value.devtype': 'disk',
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'block_device.return_value.domain': 'dom0',
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'block_device.return_value.script': None,
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})
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assignments = [
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unittest.mock.Mock(**{
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'options': {'frontend-dev': 'xvdl'},
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'device.device_node': '/dev/sdb',
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'device.backend_domain.name': 'dom0',
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}),
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unittest.mock.Mock(**{
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'options': {'devtype': 'cdrom'},
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'device.device_node': '/dev/sda',
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'device.backend_domain.name': 'dom0',
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}),
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unittest.mock.Mock(**{
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'options': {'read-only': True},
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'device.device_node': '/dev/loop0',
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'device.backend_domain.name': 'backend0',
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}),
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unittest.mock.Mock(**{
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'options': {},
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'device.device_node': '/dev/loop0',
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'device.backend_domain.name': 'backend1',
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}),
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]
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vm.devices['block'].assignments = lambda persistent: assignments
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libvirt_xml = vm.create_config_file()
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self.assertXMLEqual(lxml.etree.XML(libvirt_xml),
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lxml.etree.XML(expected))
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@unittest.mock.patch('qubes.utils.get_timezone')
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@unittest.mock.patch('qubes.utils.urandom')
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@unittest.mock.patch('qubes.vm.qubesvm.QubesVM.untrusted_qdb')
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@ -7,8 +7,8 @@
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<!-- prefer xvdd for CDROM -->
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<target dev="xvdd" />
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{%- else %}
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<target dev="xvd{{dd[i]}}" />
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{% set i = i + 1 %}
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<target dev="xvd{{dd[counter.i]}}" />
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{% if counter.update({'i': counter.i + 1}) %}{% endif %}
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{%- endif %}
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{%- if options.get('read-only', 'no') == 'yes' %}
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@ -96,7 +96,15 @@
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<devices>
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{% block devices %}
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{% set i = 0 %}
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{#
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HACK: The letter counter is implemented in this way because
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Jinja does not allow you to increment variables in a loop
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anymore. As of Jinja 2.10, we will be able to replace this
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with:
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{% set counter = namespace(i=0) %}
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{% set counter.i = counter.i + 1 %}
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#}
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{% set counter = {'i': 0} %}
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{# TODO Allow more volumes out of the box #}
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{% set dd = ['e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
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'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y']
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@ -114,8 +122,8 @@
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{% elif device.name == 'kernel' %}
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<target dev="xvdd" />
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{% else %}
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<target dev="xvd{{dd[i]}}" />
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{% set i = i + 1 %}
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<target dev="xvd{{dd[counter.i]}}" />
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{% if counter.update({'i': counter.i + 1}) %}{% endif %}
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{% endif %}
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{% if not device.rw %}
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@ -133,7 +141,7 @@
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{% endfor %}
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{# start external devices from xvdi #}
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{% set i = 4 %}
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{% set counter = {'i': 4} %}
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{% for assignment in vm.devices.block.assignments(True) %}
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{% set device = assignment.device %}
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{% set options = assignment.options %}
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@ -185,5 +193,5 @@
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{% endblock %}
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</devices>
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</domain>
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<!-- vim: set ft=jinja ts=4 sts=4 sw=4 et tw=80 : -->
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