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-rw-r--r--src/librbd/ConfigWatcher.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/librbd/ConfigWatcher.h b/src/librbd/ConfigWatcher.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_CONFIG_WATCHER_H
+#define CEPH_LIBRBD_CONFIG_WATCHER_H
+
+#include <set>
+#include <string>
+
+struct Context;
+
+namespace librbd {
+
+struct ImageCtx;
+
+template <typename ImageCtxT>
+class ConfigWatcher {
+public:
+ static ConfigWatcher* create(ImageCtxT& image_ctx) {
+ return new ConfigWatcher(image_ctx);
+ }
+
+ ConfigWatcher(ImageCtxT& image_ctx);
+ ~ConfigWatcher();
+
+ ConfigWatcher(const ConfigWatcher&) = delete;
+ ConfigWatcher& operator=(const ConfigWatcher&) = delete;
+
+ void init();
+ void shut_down();
+
+private:
+ struct Observer;
+
+ ImageCtxT& m_image_ctx;
+
+ Observer* m_observer = nullptr;
+
+ void handle_global_config_change(std::set<std::string> changed);
+
+};
+
+} // namespace librbd
+
+extern template class librbd::ConfigWatcher<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_CONFIG_WATCHER_H