initial code repo

[stor4nfv.git] / src / ceph / src / tools / rbd_mirror / ClusterWatcher.h

diff --git a/src/ceph/src/tools/rbd_mirror/ClusterWatcher.h b/src/ceph/src/tools/rbd_mirror/ClusterWatcher.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_RBD_MIRROR_CLUSTER_WATCHER_H
+#define CEPH_RBD_MIRROR_CLUSTER_WATCHER_H
+
+#include <map>
+#include <memory>
+#include <set>
+
+#include "common/ceph_context.h"
+#include "common/Mutex.h"
+#include "common/Timer.h"
+#include "include/rados/librados.hpp"
+#include "types.h"
+#include "tools/rbd_mirror/service_daemon/Types.h"
+#include <unordered_map>
+
+namespace librbd { struct ImageCtx; }
+
+namespace rbd {
+namespace mirror {
+
+template <typename> class ServiceDaemon;
+
+/**
+ * Tracks mirroring configuration for pools in a single
+ * cluster.
+ */
+class ClusterWatcher {
+public:
+  typedef std::set<peer_t> Peers;
+  typedef std::map<int64_t, Peers>  PoolPeers;
+  typedef std::set<std::string> PoolNames;
+
+  ClusterWatcher(RadosRef cluster, Mutex &lock,
+                 ServiceDaemon<librbd::ImageCtx>* service_daemon);
+  ~ClusterWatcher() = default;
+  ClusterWatcher(const ClusterWatcher&) = delete;
+  ClusterWatcher& operator=(const ClusterWatcher&) = delete;
+
+  // Caller controls frequency of calls
+  void refresh_pools();
+  const PoolPeers& get_pool_peers() const;
+
+private:
+  typedef std::unordered_map<int64_t, service_daemon::CalloutId> ServicePools;
+
+  RadosRef m_cluster;
+  Mutex &m_lock;
+  ServiceDaemon<librbd::ImageCtx>* m_service_daemon;
+
+  ServicePools m_service_pools;
+  PoolPeers m_pool_peers;
+
+  void read_pool_peers(PoolPeers *pool_peers, PoolNames *pool_names);
+};
+
+} // namespace mirror
+} // namespace rbd
+
+#endif // CEPH_RBD_MIRROR_CLUSTER_WATCHER_H