Enable caching in qvm-ls and qvm-prefs

Both tools issue a large number of Admin API calls and greatly benefit
from a cache filled with a single per-vm Admin API call
(admin.vm.property.GetAll). In case of qvm-ls, this also saves multiple
admin.vm.CurrentState calls (power state is given in the admin.vm.List
response too).

QubesOS/qubes-issues#3293

qubesadmin/tests/tools/qubes_prefs.py

@@ -29,11 +29,9 @@ def test_000_list(self):
             ('dom0', 'admin.property.List', None, None)] = \
             b'0\x00prop1\nprop2\n'
         self.app.expected_calls[
-            ('dom0', 'admin.property.Get', 'prop1', None)] = \
-            b'0\x00default=True type=str value1'
-        self.app.expected_calls[
-            ('dom0', 'admin.property.Get', 'prop2', None)] = \
-            b'0\x00default=False type=str value2'
+            ('dom0', 'admin.property.GetAll', None, None)] = \
+            b'0\x00prop1 default=True type=str value1\n' \
+            b'prop2 default=False type=str value2\n'
         with qubesadmin.tests.tools.StdoutBuffer() as stdout:
             self.assertEqual(0, qubesadmin.tools.qubes_prefs.main([], app=self.app))
         self.assertEqual(stdout.getvalue(),

qubesadmin/tests/tools/qvm_ls.py

@@ -278,42 +278,34 @@ def test_100_list_with_status(self):
             b'0\x00vm1 class=AppVM state=Running\n' \
             b'template1 class=TemplateVM state=Halted\n' \
             b'sys-net class=AppVM state=Running\n'
-        self.app.expected_calls[
-            ('vm1', 'admin.vm.CurrentState', None, None)] = \
-            b'0\x00power_state=Running'
-        self.app.expected_calls[
-            ('sys-net', 'admin.vm.CurrentState', None, None)] = \
-            b'0\x00power_state=Running'
-        self.app.expected_calls[
-            ('template1', 'admin.vm.CurrentState', None, None)] = \
-            b'0\x00power_state=Halted'
         props = {
-            'label': b'type=label green',
-            'template': b'type=vm template1',
-            'netvm': b'type=vm sys-net',
+            'label': 'type=label green',
+            'template': 'type=vm template1',
+            'netvm': 'type=vm sys-net',
 #           'virt_mode': b'type=str pv',
         }
-        for key, value in props.items():
-            self.app.expected_calls[
-                ('vm1', 'admin.vm.property.Get', key, None)] = \
-                b'0\x00default=True ' + value
-
-        # setup template1
-        props['label'] = b'type=label black'
-        for key, value in props.items():
-            self.app.expected_calls[
-                ('template1', 'admin.vm.property.Get', key, None)] = \
-                b'0\x00default=True ' + value
         self.app.expected_calls[
-            ('template1', 'admin.vm.property.Get', 'template', None)] = \
-            b''  # request refused - no such property
+            ('vm1', 'admin.vm.property.GetAll', None, None)] = \
+            b'0\x00' + ''.join(
+                '{} default=True {}\n'.format(key, value)
+                for key, value in props.items()).encode()
 
         # setup sys-net
-        props['label'] = b'type=label red'
-        for key, value in props.items():
-            self.app.expected_calls[
-                ('sys-net', 'admin.vm.property.Get', key, None)] = \
-                b'0\x00default=True ' + value
+        props['label'] = 'type=label red'
+        self.app.expected_calls[
+            ('sys-net', 'admin.vm.property.GetAll', None, None)] = \
+            b'0\x00' + ''.join(
+                '{} default=True {}\n'.format(key, value)
+                for key, value in props.items()).encode()
+
+        # setup template1
+        props['label'] = 'type=label black'
+        del props['template']
+        self.app.expected_calls[
+            ('template1', 'admin.vm.property.GetAll', None, None)] = \
+            b'0\x00' + ''.join(
+                '{} default=True {}\n'.format(key, value)
+                for key, value in props.items()).encode()
 
         with qubesadmin.tests.tools.StdoutBuffer() as stdout:
             qubesadmin.tools.qvm_ls.main([], app=self.app)
@@ -337,22 +329,24 @@ def test_101_list_selected(self):
             ('sys-net', 'admin.vm.CurrentState', None, None)] = \
             b'0\x00power_state=Running'
         props = {
-            'label': b'type=label green',
-            'template': b'type=vm template1',
-            'netvm': b'type=vm sys-net',
+            'label': 'type=label green',
+            'template': 'type=vm template1',
+            'netvm': 'type=vm sys-net',
 #           'virt_mode': b'type=str pv',
         }
-        for key, value in props.items():
-            self.app.expected_calls[
-                ('vm1', 'admin.vm.property.Get', key, None)] = \
-                b'0\x00default=True ' + value
+        self.app.expected_calls[
+            ('vm1', 'admin.vm.property.GetAll', None, None)] = \
+            b'0\x00' + ''.join(
+                '{} default=True {}\n'.format(key, value)
+                for key, value in props.items()).encode()
 
         # setup sys-net
-        props['label'] = b'type=label red'
-        for key, value in props.items():
-            self.app.expected_calls[
-                ('sys-net', 'admin.vm.property.Get', key, None)] = \
-                b'0\x00default=True ' + value
+        props['label'] = 'type=label red'
+        self.app.expected_calls[
+            ('sys-net', 'admin.vm.property.GetAll', None, None)] = \
+            b'0\x00' + ''.join(
+                '{} default=True {}\n'.format(key, value)
+                for key, value in props.items()).encode()
 
         with qubesadmin.tests.tools.StdoutBuffer() as stdout:
             qubesadmin.tools.qvm_ls.main(['vm1', 'sys-net'], app=self.app)

qubesadmin/tests/tools/qvm_prefs.py

@@ -33,11 +33,9 @@ def test_000_list(self):
             ('dom0', 'admin.vm.property.List', None, None)] = \
             b'0\x00prop1\nprop2\n'
         self.app.expected_calls[
-            ('dom0', 'admin.vm.property.Get', 'prop1', None)] = \
-            b'0\x00default=True type=str value1'
-        self.app.expected_calls[
-            ('dom0', 'admin.vm.property.Get', 'prop2', None)] = \
-            b'0\x00default=False type=str value2'
+            ('dom0', 'admin.vm.property.GetAll', None, None)] = \
+            b'0\x00prop1 default=True type=str value1\n' \
+            b'prop2 default=False type=str value2\n'
         with qubesadmin.tests.tools.StdoutBuffer() as stdout:
             self.assertEqual(0, qubesadmin.tools.qvm_prefs.main([
                 'dom0'], app=self.app))
@@ -46,7 +44,7 @@ def test_000_list(self):
             'prop2  -  value2\n')
         with qubesadmin.tests.tools.StdoutBuffer() as stdout:
             self.assertEqual(0, qubesadmin.tools.qvm_prefs.main([
-                'dom0','--hide-default'], app=self.app))
+                'dom0', '--hide-default'], app=self.app))
         self.assertEqual(stdout.getvalue(),
             'prop2  -  value2\n')
         self.assertAllCalled()

qubesadmin/tools/qvm_ls.py

@@ -664,6 +664,10 @@ def main(args=None, app=None):
         parser.print_error(str(e))
         return 1
 
+    # fetch all the properties with one Admin API call, instead of issuing
+    # one call per property
+    args.app.cache_enabled = True
+
     if args.raw_list:
         args.raw_data = True
         args.fields = 'name'

qubesadmin/tools/qvm_prefs.py

@@ -93,6 +93,9 @@ def process_actions(parser, args, target):
         return 0
 
     if args.property is None:
+        # fetch all the properties with one Admin API call, instead of issuing
+        # one call per property
+        args.app.cache_enabled = True
         properties = target.property_list()
         width = max(len(prop) for prop in properties)