update source to Ceph Pacific 16.2.2

[ceph.git] / ceph / src / librbd / cache / Utils.h

diff --git a/ceph/src/librbd/cache/Utils.h b/ceph/src/librbd/cache/Utils.h
new file mode 100644 (file)
index 0000000..cd2eb7c
--- /dev/null
+++ b/ceph/src/librbd/cache/Utils.h
@@ -0,0 +1,33 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_CACHE_UTILS_H
+#define CEPH_LIBRBD_CACHE_UTILS_H
+
+#include "acconfig.h"
+#include <string>
+
+class Context;
+
+namespace librbd {
+
+struct ImageCtx;
+
+namespace cache {
+namespace util {
+
+template <typename T>
+bool is_pwl_enabled(T& image_ctx) {
+#if defined(WITH_RBD_RWL) || defined(WITH_RBD_SSD_CACHE)
+  auto value = image_ctx.config.template get_val<std::string>("rbd_persistent_cache_mode");
+  return value == "disabled" ? false : true;
+#else
+  return false;
+#endif // WITH_RBD_RWL
+}
+
+} // namespace util
+} // namespace cache
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_CACHE_UTILS_H