conf: backup: Add fields for tracking stats of completed sub-jobs

We need a place to store stats of completed sub-jobs so that we can
later report accurate stats.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/conf/backup_conf.h

@@ -70,6 +70,13 @@ struct _virDomainBackupDef {
 
     size_t ndisks; /* should not exceed dom->ndisks */
     virDomainBackupDiskDef *disks;
+
+    /* internal data */
+    /* statistic totals for completed disks */
+    unsigned long long push_transferred;
+    unsigned long long push_total;
+    unsigned long long pull_tmp_used;
+    unsigned long long pull_tmp_total;
 };
 
 typedef enum {