createvol: Hook up configure switch to hide unsupported RHEL6 formats

src/virtManager/connection.py

@@ -381,6 +381,14 @@ class vmmConnection(vmmGObject):
             return True
         return self.config.rhel6_defaults
 
+    def rhel6_defaults_caps(self):
+        caps = self.get_capabilities()
+        for guest in caps.guests:
+            for dom in guest.domains:
+                if dom.emulator.startswith("/usr/libexec"):
+                    return self.config.rhel6_defaults
+        return True
+
     def is_kvm_supported(self):
         return self.get_capabilities().is_kvm_available()
 

src/virtManager/createvol.py

@@ -158,6 +158,7 @@ class vmmCreateVolume(vmmGObjectUI):
         return None
 
     def populate_vol_format(self):
+        rhel6_file_whitelist = ["raw", "qcow2", "qed"]
         model = self.widget("vol-format").get_model()
         model.clear()
 
@@ -165,6 +166,14 @@ class vmmCreateVolume(vmmGObjectUI):
         if hasattr(self.vol_class, "create_formats"):
             formats = getattr(self.vol_class, "create_formats")
 
+        if (self.vol_class == Storage.FileVolume and
+            not self.conn.rhel6_defaults_caps()):
+            newfmts = []
+            for f in rhel6_file_whitelist:
+                if f in formats:
+                    newfmts.append(f)
+            formats = newfmts
+
         for f in formats:
             model.append([f, f])