dc2cf1db5d
There was also one case of triggering property-{del => reset}
synthetically on default value change. Adjust it too and drop -pre-
event call in that case.
QubesOS/qubes-issues#5834
93 lines
3.8 KiB
Python
93 lines
3.8 KiB
Python
#
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# The Qubes OS Project, https://www.qubes-os.org/
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#
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# Copyright (C) 2019 Frédéric Pierret <frederic.pierret@qubes-os.org>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, see <https://www.gnu.org/licenses/>.
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#
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import asyncio
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import qubes.config
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import qubes.ext
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class AUDIO(qubes.ext.Extension):
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# pylint: disable=unused-argument,no-self-use
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@staticmethod
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def attached_vms(vm):
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for domain in vm.app.domains:
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if getattr(domain, 'audiovm', None) and domain.audiovm == vm:
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yield domain
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@qubes.ext.handler('domain-pre-shutdown')
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@asyncio.coroutine
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def on_domain_pre_shutdown(self, vm, event, **kwargs):
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attached_vms = [domain for domain in self.attached_vms(vm) if
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domain.is_running()]
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if attached_vms and not kwargs.get('force', False):
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raise qubes.exc.QubesVMError(
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self, 'There are running VMs using this VM as AudioVM: '
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'{}'.format(', '.join(vm.name for vm in attached_vms)))
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@qubes.ext.handler('domain-init', 'domain-load')
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def on_domain_init_load(self, vm, event):
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if getattr(vm, 'audiovm', None):
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if 'audiovm-' + vm.audiovm.name not in vm.tags:
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self.on_property_set(vm, event, name='audiovm',
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newvalue=vm.audiovm)
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@qubes.ext.handler('property-reset:audiovm')
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def on_property_reset(self, subject, event, name, oldvalue=None):
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newvalue = getattr(subject, 'audiovm', None)
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self.on_property_set(subject, event, name, newvalue, oldvalue)
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@qubes.ext.handler('property-set:audiovm')
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def on_property_set(self, subject, event, name, newvalue, oldvalue=None):
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# Clean other 'audiovm-XXX' tags.
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# pulseaudio agent (module-vchan-sink) can connect to only one domain
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tags_list = list(subject.tags)
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for tag in tags_list:
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if tag.startswith('audiovm-'):
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subject.tags.remove(tag)
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if newvalue:
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audiovm = 'audiovm-' + newvalue.name
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subject.tags.add(audiovm)
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@qubes.ext.handler('domain-qdb-create')
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def on_domain_qdb_create(self, vm, event):
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# Add AudioVM Xen ID for gui-agent
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if getattr(vm, 'audiovm', None):
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if vm != vm.audiovm and vm.audiovm.is_running():
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vm.untrusted_qdb.write('/qubes-audio-domain-xid',
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str(vm.audiovm.xid))
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@qubes.ext.handler('property-set:default_audiovm', system=True)
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def on_property_set_default_audiovm(self, app, event, name, newvalue,
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oldvalue=None):
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for vm in app.domains:
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if hasattr(vm, 'audiovm') and vm.property_is_default('audiovm'):
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vm.fire_event('property-set:audiovm',
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name='audiovm', newvalue=newvalue,
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oldvalue=oldvalue)
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@qubes.ext.handler('domain-start')
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def on_domain_start(self, vm, event, **kwargs):
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attached_vms = [domain for domain in self.attached_vms(vm) if
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domain.is_running()]
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for attached_vm in attached_vms:
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attached_vm.untrusted_qdb.write('/qubes-audio-domain-xid',
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str(vm.xid))
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