[libvirt] [PATCH v2 02/15] vbox: Close media when undefining domains

[Dawid Zamirski]

When registering a VM we call OpenMedium on each disk image which adds it
to vbox's global media registry. Therefore, we should make sure to call
Close when unregistering VM so we cleanup the media registry entries
after ourselves - this does not remove disk image files. This follows
the behaviour of the VBoxManage unregistervm command.
---
 src/vbox/vbox_tmpl.c | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c
index 4aa5e9a63..2679b60f7 100644
--- a/src/vbox/vbox_tmpl.c
+++ b/src/vbox/vbox_tmpl.c
@@ -378,6 +378,8 @@ _unregisterMachine(vboxDriverPtr data, vboxIID *iid, IMachine **machine)
 {
     nsresult rc;
     vboxArray media = VBOX_ARRAY_INITIALIZER;
+    size_t i;
+
     rc = data->vboxObj->vtbl->FindMachine(data->vboxObj, iid->value, machine);
     if (NS_FAILED(rc)) {
         virReportError(VIR_ERR_NO_DOMAIN, "%s",
@@ -385,12 +387,24 @@ _unregisterMachine(vboxDriverPtr data, vboxIID *iid, IMachine **machine)
         return rc;
     }
 
-    /* We're not interested in the array returned by the Unregister method,
-     * but in the side effect of unregistering the virtual machine. In order
-     * to call the Unregister method correctly we need to use the vboxArray
-     * wrapper here. */
     rc = vboxArrayGetWithUintArg(&media, *machine, (*machine)->vtbl->Unregister,
-                                 CleanupMode_DetachAllReturnNone);
+                                 CleanupMode_DetachAllReturnHardDisksOnly);
+
+    if (NS_FAILED(rc))
+        goto cleanup;
+
+    /* close each medium attached to VM to remove from media registry */
+    for (i = 0; i < media.count; i++) {
+        IMedium *medium = media.items[i];
+
+        if (!medium)
+            continue;
+
+        /* it's ok to ignore failure here - e.g. it may be used by another VM */
+        ignore_value(medium->vtbl->Close(medium));
+    }
+
+ cleanup:
     vboxArrayUnalloc(&media);
     return rc;
 }
-- 
2.14.2