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diff --git a/src/ceph/src/librbd/journal/Utils.h b/src/ceph/src/librbd/journal/Utils.h
new file mode 100644
index 0000000..0a272bf
--- /dev/null
+++ b/src/ceph/src/librbd/journal/Utils.h
@@ -0,0 +1,81 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_JOURNAL_UTILS_H
+#define CEPH_LIBRBD_JOURNAL_UTILS_H
+
+#include "include/int_types.h"
+#include "include/Context.h"
+#include "cls/journal/cls_journal_types.h"
+#include <list>
+
+struct CephContext;
+struct Mutex;
+
+namespace librbd {
+namespace journal {
+
+struct TagData;
+
+namespace util {
+
+struct C_DecodeTag : public Context {
+  CephContext *cct;
+  Mutex *lock;
+  uint64_t *tag_tid;
+  TagData *tag_data;
+  Context *on_finish;
+
+  cls::journal::Tag tag;
+
+  C_DecodeTag(CephContext *cct, Mutex *lock, uint64_t *tag_tid,
+              TagData *tag_data, Context *on_finish)
+    : cct(cct), lock(lock), tag_tid(tag_tid), tag_data(tag_data),
+      on_finish(on_finish) {
+  }
+
+  void complete(int r) override {
+    on_finish->complete(process(r));
+    Context::complete(0);
+  }
+  void finish(int r) override {
+  }
+
+  int process(int r);
+
+  static int decode(bufferlist::iterator *it, TagData *tag_data);
+
+};
+
+struct C_DecodeTags : public Context {
+  typedef std::list<cls::journal::Tag> Tags;
+
+  CephContext *cct;
+  Mutex *lock;
+  uint64_t *tag_tid;
+  TagData *tag_data;
+  Context *on_finish;
+
+  Tags tags;
+
+  C_DecodeTags(CephContext *cct, Mutex *lock, uint64_t *tag_tid,
+               TagData *tag_data, Context *on_finish)
+    : cct(cct), lock(lock), tag_tid(tag_tid), tag_data(tag_data),
+      on_finish(on_finish) {
+  }
+
+  void complete(int r) override {
+    on_finish->complete(process(r));
+    Context::complete(0);
+  }
+  void finish(int r) override {
+  }
+
+  int process(int r);
+};
+
+} // namespace util
+} // namespace journal
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_JOURNAL_UTILS_H