util: storage: Introduce privateData for _virStorageSource

Introduce the bare necessities to add privateData to _virStorageSource.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

src/util/virstoragefile.c

@@ -2295,6 +2295,7 @@ virStorageSourceClear(virStorageSourcePtr def)
 
     virStorageNetHostDefFree(def->nhosts, def->hosts);
     virStorageAuthDefFree(def->auth);
+    virObjectUnref(def->privateData);
 
     VIR_FREE(def->nodestorage);
     VIR_FREE(def->nodeformat);

src/util/virstoragefile.h

@@ -27,6 +27,7 @@
 # include <sys/stat.h>
 
 # include "virbitmap.h"
+# include "virobject.h"
 # include "virseclabel.h"
 # include "virstorageencryption.h"
 # include "virutil.h"
@@ -241,6 +242,8 @@ struct _virStorageSource {
     virStorageAuthDefPtr auth;
     virStorageEncryptionPtr encryption;
 
+    virObjectPtr privateData;
+
     char *driverName;
     int format; /* virStorageFileFormat in domain backing chains, but
                  * pool-specific enum for storage volumes */