[PATCH] testbot/LibvirtTool: Check the VM state before putting it back online.

[Francois Gouget]

Normally GetSnapshotName() returns undef when the domain is busy
reverting. But that's an undocumented feature and the the VM may end up
in a state where GetSnapshotName() returns undef despite the VM being
usable (e.g. powered off after a failed revert).
So check the Libvirt domain state instead.

Signed-off-by: Francois Gouget 
---
 testbot/bin/LibvirtTool.pl               | 46 ++++++++----------------
 testbot/lib/WineTestBot/LibvirtDomain.pm | 21 +++++++++++
 2 files changed, 35 insertions(+), 32 deletions(-)

diff --git a/testbot/bin/LibvirtTool.pl b/testbot/bin/LibvirtTool.pl
index f15bab70b..dca5a921e 100755
--- a/testbot/bin/LibvirtTool.pl
+++ b/testbot/bin/LibvirtTool.pl
@@ -282,42 +282,24 @@ sub Monitor()
       return 0;
     }

-    my ($ErrMessage, $SnapshotName) = $VM->GetDomain()->GetSnapshotName();
-    if (defined $ErrMessage)
-    {
-      Error "$ErrMessage\n";
-    }
-    else
+    my $IsReady = $VM->GetDomain()->IsReady();
+    if ($IsReady and $VM->GetDomain()->IsPoweredOn())
     {
-      my $IsPoweredOn;
-      if (!defined $SnapshotName)
-      {
-        Debug("$VMKey has no snapshot (reverting?)\n");
-        $IsPoweredOn = undef;
-      }
-      elsif (!defined $SnapshotName or $SnapshotName ne $VM->IdleSnapshot)
-      {
-        $IsPoweredOn = 0;
-      }
-      else
-      {
-        $IsPoweredOn = $VM->GetDomain()->IsPoweredOn();
-        if ($IsPoweredOn)
-        {
-          $ErrMessage = $VM->GetDomain()->PowerOff();
-          Error "$ErrMessage\n" if (defined $ErrMessage);
-          $IsPoweredOn = undef;
-        }
-      }
-      if (defined $IsPoweredOn)
+      my $ErrMessage = $VM->GetDomain()->PowerOff();
+      if (defined $ErrMessage)
       {
-        return 1 if (ChangeStatus("offline", "off", "done"));
-        NotifyAdministrator("The $VMKey VM is working again",
-                            "The $VMKey VM started working again after ".
-                            PrettyElapsed($Start) .".");
-        return 0;
+        Error "$ErrMessage\n";
+        $IsReady = undef;
       }
     }
+    if ($IsReady)
+    {
+      return 1 if (ChangeStatus("offline", "off", "done"));
+      NotifyAdministrator("The $VMKey VM is working again",
+                          "The $VMKey VM started working again after ".
+                          PrettyElapsed($Start) .".");
+      return 0;
+    }

Debug(Elapsed($Start), " $VMKey is still unreachable\n");
     sleep(60);
diff --git a/testbot/lib/WineTestBot/LibvirtDomain.pm b/testbot/lib/WineTestBot/LibvirtDomain.pm
index d6c07408c..4e1c4ee07 100644
--- a/testbot/lib/WineTestBot/LibvirtDomain.pm
+++ b/testbot/lib/WineTestBot/LibvirtDomain.pm
@@ -365,6 +365,27 @@ sub IsPoweredOn($)
   return ($State == Sys::Virt::Domain::STATE_RUNNING);
 }

+sub IsReady($)
+{
+  my ($self) = @_;
+
+  my ($ErrMessage, $Domain) = $self->_GetDomain();
+  if (defined $ErrMessage)
+  {
+    $@ = $ErrMessage;
+    return undef;
+  }
+
+  my ($State, $_Reason);
+  eval { ($State, $_Reason) = $Domain->get_state() };
+  return $self->_Reset(undef) if ($@);
+  return ($State == Sys::Virt::Domain::STATE_RUNNING or
+          $State == Sys::Virt::Domain::STATE_SHUTOFF or
+          $State == Sys::Virt::Domain::STATE_CRASHED or
+          $State == Sys::Virt::Domain::STATE_PMSUSPENDED
+      );
+}
+
 sub _GetStateName($)
 {
   my ($State) = @_;