b964e8c33f
If the action is LAUNCH instead of qubes.SomeService, then just start the dispVM, write (only) its name to stdout, and quit. If the action is FINISH, then kill and remove the named dispVM.
201 lines
7.8 KiB
Python
Executable File
201 lines
7.8 KiB
Python
Executable File
#!/usr/bin/python2
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# coding=utf-8
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2010 Rafal Wojtczuk <rafal@invisiblethingslab.com>
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# Copyright (C) 2013-2015 Marek Marczykowski-Górecki
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# <marmarek@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program 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
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#
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import os
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import subprocess
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import sys
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import shutil
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import time
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from qubes.qubes import QubesVmCollection, QubesException
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from qubes.qubes import QubesDispVmLabels
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from qubes.notify import tray_notify, tray_notify_error, tray_notify_init
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current_savefile = '/var/run/qubes/current-savefile'
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current_savefile_vmdir = '/var/lib/qubes/dvmdata/vmdir'
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class QfileDaemonDvm:
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def __init__(self, name):
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self.name = name
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@staticmethod
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def get_disp_templ():
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vmdir = os.readlink(current_savefile_vmdir)
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return vmdir.split('/')[-1]
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def do_get_dvm(self):
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tray_notify("Starting new DispVM...", "red")
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qvm_collection = QubesVmCollection()
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qvm_collection.lock_db_for_writing()
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try:
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tar_process = subprocess.Popen(
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['bsdtar', '-C', current_savefile_vmdir,
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'-xSUf', os.path.join(current_savefile_vmdir, 'saved-cows.tar')])
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qvm_collection.load()
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print >>sys.stderr, "time=%s, collection loaded" % (str(time.time()))
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vm = qvm_collection.get_vm_by_name(self.name)
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if vm is None:
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sys.stderr.write('Domain ' + self.name + ' does not exist ?')
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return None
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label = vm.label
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if len(sys.argv) > 4 and len(sys.argv[4]) > 0:
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assert sys.argv[4] in QubesDispVmLabels.keys(), "Invalid label"
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label = QubesDispVmLabels[sys.argv[4]]
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disp_templ = self.get_disp_templ()
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vm_disptempl = qvm_collection.get_vm_by_name(disp_templ)
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if vm_disptempl is None:
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sys.stderr.write('Domain ' + disp_templ + ' does not exist ?')
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return None
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dispvm = qvm_collection.add_new_vm('QubesDisposableVm',
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disp_template=vm_disptempl,
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label=label)
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print >>sys.stderr, "time=%s, VM created" % (str(time.time()))
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# By default inherit firewall rules from calling VM
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disp_firewall_conf = '/var/run/qubes/%s-firewall.xml' % dispvm.name
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dispvm.firewall_conf = disp_firewall_conf
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if os.path.exists(vm.firewall_conf):
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shutil.copy(vm.firewall_conf, disp_firewall_conf)
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elif vm.qid == 0 and os.path.exists(vm_disptempl.firewall_conf):
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# for DispVM called from dom0, copy use rules from DispVM template
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shutil.copy(vm_disptempl.firewall_conf, disp_firewall_conf)
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if len(sys.argv) > 5 and len(sys.argv[5]) > 0:
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assert os.path.exists(sys.argv[5]), "Invalid firewall.conf location"
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dispvm.firewall_conf = sys.argv[5]
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if vm.qid != 0:
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dispvm.uses_default_netvm = False
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# netvm can be changed before restore,
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# but cannot be enabled/disabled
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if (dispvm.netvm is None) == (vm.dispvm_netvm is None):
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dispvm.netvm = vm.dispvm_netvm
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# Wait for tar to finish
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if tar_process.wait() != 0:
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sys.stderr.write('Failed to unpack saved-cows.tar')
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return None
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print >>sys.stderr, "time=%s, VM starting" % (str(time.time()))
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try:
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dispvm.start()
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except (MemoryError, QubesException) as e:
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tray_notify_error(str(e))
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raise
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if vm.qid != 0:
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# if need to enable/disable netvm, do it while DispVM is alive
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if (dispvm.netvm is None) != (vm.dispvm_netvm is None):
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dispvm.netvm = vm.dispvm_netvm
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print >>sys.stderr, "time=%s, VM started" % (str(time.time()))
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qvm_collection.save()
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finally:
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qvm_collection.unlock_db()
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# Reload firewall rules
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print >>sys.stderr, "time=%s, reloading firewall" % (str(time.time()))
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for vm in qvm_collection.values():
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if vm.is_proxyvm() and vm.is_running():
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vm.write_iptables_qubesdb_entry()
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return dispvm
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@staticmethod
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def dvm_setup_ok():
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dvmdata_dir = '/var/lib/qubes/dvmdata/'
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if not os.path.isfile(current_savefile):
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return False
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if not os.path.isfile(dvmdata_dir+'default-savefile') or \
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not os.path.isfile(dvmdata_dir+'savefile-root'):
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return False
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dvm_mtime = os.stat(current_savefile).st_mtime
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root_mtime = os.stat(dvmdata_dir+'savefile-root').st_mtime
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if dvm_mtime < root_mtime:
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template_name = os.path.basename(
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os.path.dirname(os.readlink(dvmdata_dir+'savefile-root')))
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if subprocess.call(["xl", "domid", template_name],
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stdout=open(os.devnull, "w")) == 0:
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tray_notify("For optimum performance, you should not "
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"start DispVM when its template is running.", "red")
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return False
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return True
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def get_dvm(self):
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if not self.dvm_setup_ok():
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if os.system("/usr/lib/qubes/"
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"qubes-update-dispvm-savefile-with-progress.sh"
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" >/dev/null </dev/null") != 0:
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tray_notify_error("DVM savefile creation failed")
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return None
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return self.do_get_dvm()
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@staticmethod
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def finish_disposable(name):
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qvm_collection = QubesVmCollection()
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qvm_collection.lock_db_for_writing()
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qvm_collection.load()
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vm = qvm_collection.get_vm_by_name(name)
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if vm is None:
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qvm_collection.unlock_db()
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return False
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try:
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vm.force_shutdown()
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except QubesException:
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# VM already destroyed
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pass
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qvm_collection.pop(vm.qid)
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qvm_collection.save()
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qvm_collection.unlock_db()
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def main():
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exec_index = sys.argv[1]
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if exec_index == "FINISH":
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QfileDaemonDvm.finish_disposable(sys.argv[2])
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return
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src_vmname = sys.argv[2]
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user = sys.argv[3]
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# accessed directly by get_dvm()
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# sys.argv[4] - override label
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# sys.argv[5] - override firewall
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print >>sys.stderr, "time=%s, qfile-daemon-dvm init" % (str(time.time()))
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tray_notify_init()
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print >>sys.stderr, "time=%s, creating DispVM" % (str(time.time()))
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qfile = QfileDaemonDvm(src_vmname)
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dispvm = qfile.get_dvm()
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if dispvm is not None:
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if exec_index == "LAUNCH":
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print dispvm.name
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return
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print >>sys.stderr, "time=%s, starting VM process" % (str(time.time()))
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subprocess.call(['/usr/lib/qubes/qrexec-client', '-d', dispvm.name,
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user+':exec /usr/lib/qubes/qubes-rpc-multiplexer ' +
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exec_index + " " + src_vmname])
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QfileDaemonDvm.finish_disposable(dispvm.name)
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main()
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