1 files changed, 54 insertions, 0 deletions
diff --git a/src/librbd/io/ImageDispatchSpec.cc b/src/librbd/io/ImageDispatchSpec.cc
new file mode 100644
index 000000000..95d8224ae
--- /dev/null
+++ b/src/librbd/io/ImageDispatchSpec.cc
@@ -0,0 +1,54 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/io/ImageDispatchSpec.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/io/AioCompletion.h"
+#include "librbd/io/ImageRequest.h"
+#include "librbd/io/ImageDispatcherInterface.h"
+#include <boost/variant.hpp>
+
+namespace librbd {
+namespace io {
+
+void ImageDispatchSpec::C_Dispatcher::complete(int r) {
+  switch (image_dispatch_spec->dispatch_result) {
+  case DISPATCH_RESULT_RESTART:
+    ceph_assert(image_dispatch_spec->dispatch_layer != 0);
+    image_dispatch_spec->dispatch_layer = static_cast<ImageDispatchLayer>(
+      image_dispatch_spec->dispatch_layer - 1);
+    [[fallthrough]];
+  case DISPATCH_RESULT_CONTINUE:
+    if (r < 0) {
+      // bubble dispatch failure through AioCompletion
+      image_dispatch_spec->dispatch_result = DISPATCH_RESULT_COMPLETE;
+      image_dispatch_spec->fail(r);
+      return;
+    }
+
+    image_dispatch_spec->send();
+    break;
+  case DISPATCH_RESULT_COMPLETE:
+    finish(r);
+    break;
+  case DISPATCH_RESULT_INVALID:
+    ceph_abort();
+    break;
+  }
+}
+
+void ImageDispatchSpec::C_Dispatcher::finish(int r) {
+  delete image_dispatch_spec;
+}
+
+void ImageDispatchSpec::send() {
+  image_dispatcher->send(this);
+}
+
+void ImageDispatchSpec::fail(int r) {
+  dispatch_result = DISPATCH_RESULT_COMPLETE;
+  aio_comp->fail(r);
+}
+
+} // namespace io
+} // namespace librbd