migration: remove the QEMUFileOps 'get_return_path' callback

This directly implements the get_return_path logic using QIOChannel APIs.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

1 files changed, 10 insertions, 12 deletions

diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index 355117f..fad0e33 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -95,18 +95,6 @@ int qemu_file_shutdown(QEMUFile *f)
     return ret;
 }
 
-/*
- * Result: QEMUFile* for a 'return path' for comms in the opposite direction
- *         NULL if not available
- */
-QEMUFile *qemu_file_get_return_path(QEMUFile *f)
-{
-    if (!f->ops->get_return_path) {
-        return NULL;
-    }
-    return f->ops->get_return_path(f->ioc);
-}
-
 bool qemu_file_mode_is_not_valid(const char *mode)
 {
     if (mode == NULL ||
@@ -134,6 +122,16 @@ static QEMUFile *qemu_file_new_impl(QIOChannel *ioc,
     return f;
 }
 
+/*
+ * Result: QEMUFile* for a 'return path' for comms in the opposite direction
+ *         NULL if not available
+ */
+QEMUFile *qemu_file_get_return_path(QEMUFile *f)
+{
+    object_ref(f->ioc);
+    return qemu_file_new_impl(f->ioc, f->ops, !f->is_writable);
+}
+
 QEMUFile *qemu_file_new_output(QIOChannel *ioc, const QEMUFileOps *ops)
 {
     return qemu_file_new_impl(ioc, ops, true);