core: split HVM template into separate class

core-modules/01QubesHVm.py

@@ -87,9 +87,6 @@ class QubesHVm(QubesVm):
         if self.guiagent_installed:
             self._start_guid_first = False
 
-        # The QubesHVM can be a template itself, so collect appvms based on it
-        self.appvms = QubesVmCollection()
-
     @property
     def type(self):
         return "HVM"
@@ -97,13 +94,9 @@ class QubesHVm(QubesVm):
     def is_appvm(self):
         return True
 
-    def is_template(self):
-        # Any non-template based HVM can be a template itself
-        return self.template is None
-
     @classmethod
     def is_template_compatible(cls, template):
-        if template and (not template.is_template() or template.type != "HVM"):
+        if template and (not template.is_template() or template.type != "TemplateHVM"):
             return False
         return True
 
@@ -322,9 +315,6 @@ class QubesHVm(QubesVm):
             return -1
 
     def start(self, *args, **kwargs):
-        for vm in self.appvms.values():
-            if vm.is_running():
-                raise QubesException("Cannot start HVM template while VMs based on it are running")
         if self.template and self.template.is_running():
             raise QubesException("Cannot start the HVM while its template is running")
         try:

core-modules/02QubesTemplateHVm.py

@@ -0,0 +1,77 @@
+#!/usr/bin/python2
+#
+# The Qubes OS Project, http://www.qubes-os.org
+#
+# Copyright (C) 2010  Joanna Rutkowska <joanna@invisiblethingslab.com>
+# Copyright (C) 2013  Marek Marczykowski <marmarek@invisiblethingslab.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+#
+
+import os
+import os.path
+import subprocess
+import stat
+import sys
+import re
+
+from qubes.qubes import QubesHVm,register_qubes_vm_class,xs,xc,dry_run
+from qubes.qubes import QubesException,QubesVmCollection
+from qubes.qubes import system_path,defaults
+
+class QubesTemplateHVm(QubesHVm):
+    """
+    A class that represents an HVM template. A child of QubesHVm.
+    """
+
+    # In which order load this VM type from qubes.xml
+    load_order = 50
+
+    def get_attrs_config(self):
+        attrs_config = super(QubesTemplateHVm, self).get_attrs_config()
+        attrs_config['dir_path']['eval'] = 'value if value is not None else os.path.join(system_path["qubes_templates_dir"], self.name)'
+        attrs_config['label']['default'] = defaults["template_label"]
+        return attrs_config
+
+
+    def __init__(self, **kwargs):
+
+        super(QubesTemplateHVm, self).__init__(**kwargs)
+
+        self.appvms = QubesVmCollection()
+
+    @property
+    def type(self):
+        return "TemplateHVM"
+
+    @property
+    def updateable(self):
+        return True
+
+    def is_template(self):
+        return True
+
+    @classmethod
+    def is_template_compatible(cls, template):
+        return False
+
+    def start(self, *args, **kwargs):
+        for vm in self.appvms.values():
+            if vm.is_running():
+                raise QubesException("Cannot start HVM template while VMs based on it are running")
+        super(QubesTemplateHVm, self).start(*args, **kwargs)
+
+register_qubes_vm_class(QubesTemplateHVm)

qvm-tools/qvm-create

@@ -39,7 +39,9 @@ def main():
     parser.add_option ("-p", "--proxy", action="store_true", dest="proxyvm", default=False,
                         help="Create ProxyVM")
     parser.add_option ("-H", "--hvm", action="store_true", dest="hvm", default=False,
-                        help="Create HVM (implies --standalone)")
+                        help="Create HVM (standalone unless --template option used)")
+    parser.add_option ("--hvm-template", action="store_true", dest="hvm_template", default=False,
+                        help="Create HVM template")
     parser.add_option ("-n", "--net", action="store_true", dest="netvm", default=False,
                         help="Create NetVM")
     parser.add_option ("-s", "--standalone", action="store_true", dest="standalone", default=False,
@@ -61,8 +63,8 @@ def main():
         parser.error ("You must specify VM name!")
     vmname = args[0]
 
-    if options.netvm and options.proxyvm:
-        parser.error ("You must specify at most one of --proxy and --net")
+    if (options.netvm + options.proxyvm + options.hvm + options.hvm_template) > 1:
+        parser.error ("You must specify at most one VM type switch")
         
     if os.geteuid() == 0:
         print >> sys.stderr, "*** Running this tool as root is strongly discouraged, this will lead you in permissions problems."
@@ -91,6 +93,13 @@ def main():
         print >> sys.stderr, "root.img can be specified only for standalone VMs"
         exit (1)
 
+    if options.hvm_template and options.template is not None:
+        print >> sys.stderr, "Template VM cannot be based on another template"
+        exit (1)
+
+    if options.hvm and not options.template:
+        options.standalone = True
+
     if options.root is not None and not os.path.exists(options.root):
         print >> sys.stderr, "File specified as root.img does not exists"
         exit (1)
@@ -115,7 +124,7 @@ def main():
         if (options.verbose):
             print "--> Using TemplateVM: {0}".format(template.name)
 
-    elif not options.hvm:
+    elif not options.hvm and not options.hvm_template:
         if qvm_collection.get_default_template() is None:
             print >> sys.stderr, "No default TemplateVM defined!"
             exit (1)
@@ -136,6 +145,8 @@ def main():
         vmtype = "QubesProxyVm"
     elif options.hvm:
         vmtype = "QubesHVm"
+    elif options.hvm_template:
+        vmtype = "QubesTemplateHVm"
     else:
         vmtype = "QubesAppVm"