Fixes to get ctest up and running again.

We had a major issue because the latest dev channel release pre-dates the virtio change.  Because of this, ctest was connecting to update that channel using virtio (which is unsupported for that).  This change drops a file telling the vm lib to use e1000 as before.

Also, fixed stateful change logic.

Change-Id: I394a8cece71bdd0d55efa21ba5b6d24804432c6b

BUG=chromium-os:10434
TEST=Ran it with ctest and cros_au_test_harness on images with/without the file.

Review URL: http://codereview.chromium.org/5928005

bin/cros_au_test_harness.py

@@ -85,14 +85,14 @@ class AUTest(object):
     if self.use_delta_updates:
       try:
         self.source_image = src_image
-        self._UpdateImageReportError(image)
+        self._UpdateImageReportError(image, stateful_change)
       except:
         Warning('Delta update failed, disabling delta updates and retrying.')
         self.use_delta_updates = False
         self.source_image = ''
-        self._UpdateImageReportError(image)
+        self._UpdateImageReportError(image, stateful_change)
     else:
-      self._UpdateImageReportError(image)
+      self._UpdateImageReportError(image, stateful_change)
 
   def _UpdateImageReportError(self, image_path, stateful_change='old',
                               proxy_port=None):
@@ -355,9 +355,19 @@ class AUTest(object):
         self.data_size += len(data)
         return data
 
-
     self._AttemptUpdateWithFilter(DelayedFilter())
 
+  def SimpleTest(self):
+    """A simple update  that updates the target image to itself.
+
+    We explicitly don't use test prefix so that isn't run by default.  Can be
+    run using test_prefix option.
+    """
+    self.PrepareBase(target_image_path)
+    self.UpdateImage(target_image_path)
+    self.VerifyImage(100)
+
+
 class RealAUTest(unittest.TestCase, AUTest):
   """Test harness for updating real images."""
 

bin/ctest.py

@@ -22,6 +22,7 @@ from cros_build_lib import RunCommand
 from cros_build_lib import Warning
 
 _IMAGE_TO_EXTRACT = 'chromiumos_test_image.bin'
+_NEW_STYLE_VERSION = '0.9.131.0'
 
 class HTMLDirectoryParser(HTMLParser.HTMLParser):
   """HTMLParser for parsing the default apache file index."""
@@ -216,6 +217,13 @@ def GrabZipAndExtractImage(zip_url, download_folder, image_name) :
     fh.write(zip_url)
     fh.close()
 
+  version = zip_url.split('/')[-2]
+  if not _GreaterVersion(version, _NEW_STYLE_VERSION) == version:
+    # If the version isn't ready for new style, touch file to use old style.
+    old_style_touch_path = os.path.join(download_folder, '.use_e1000')
+    fh = open(old_style_touch_path, 'w+')
+    fh.close()
+
 
 def RunAUTestHarness(board, channel, latest_url_base, zip_server_base,
                      no_graphics, type, remote):

lib/cros_vm_lib.sh

@@ -70,11 +70,17 @@ function start_kvm() {
       snapshot="-snapshot"
     fi
 
+    local net_option="-net nic,model=virtio"
+    if [ -f "$(dirname $1)/.use_e1000" ]; then
+      info "Detected older image, using e1000 instead of virtio."
+      net_option="-net nic,model=e1000"
+    fi
+
     sudo kvm -m 1024 \
       -vga std \
       -pidfile "${KVM_PID_FILE}" \
       -daemonize \
-      -net nic,model=virtio \
+      ${net_option} \
       ${nographics} \
       ${snapshot} \
       -net user,hostfwd=tcp::${FLAGS_ssh_port}-:22 \