initial code repo

[stor4nfv.git] / src / ceph / src / librbd / managed_lock / Utils.cc

diff --git a/src/ceph/src/librbd/managed_lock/Utils.cc b/src/ceph/src/librbd/managed_lock/Utils.cc
new file mode 100644 (file)
index 0000000..64210be
--- /dev/null
+++ b/src/ceph/src/librbd/managed_lock/Utils.cc
@@ -0,0 +1,43 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "include/assert.h"
+#include "librbd/managed_lock/Utils.h"
+#include <sstream>
+
+namespace librbd {
+namespace managed_lock {
+namespace util {
+
+namespace {
+
+const std::string WATCHER_LOCK_COOKIE_PREFIX = "auto";
+const std::string WATCHER_LOCK_TAG("internal");
+
+} // anonymous namespace
+
+const std::string &get_watcher_lock_tag() {
+  return WATCHER_LOCK_TAG;
+}
+
+bool decode_lock_cookie(const std::string &tag, uint64_t *handle) {
+  std::string prefix;
+  std::istringstream ss(tag);
+  if (!(ss >> prefix >> *handle) || prefix != WATCHER_LOCK_COOKIE_PREFIX) {
+    return false;
+  }
+  return true;
+}
+
+std::string encode_lock_cookie(uint64_t watch_handle) {
+  assert(watch_handle != 0);
+  std::ostringstream ss;
+  ss << WATCHER_LOCK_COOKIE_PREFIX << " " << watch_handle;
+  return ss.str();
+}
+
+} // namespace util
+} // namespace managed_lock
+} // namespace librbd
+
+