1 files changed, 79 insertions, 0 deletions
diff --git a/src/tools/cephfs_mirror/MirrorWatcher.h b/src/tools/cephfs_mirror/MirrorWatcher.h
new file mode 100644
index 000000000..c4d4f4522
--- /dev/null
+++ b/src/tools/cephfs_mirror/MirrorWatcher.h
@@ -0,0 +1,79 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPHFS_MIRROR_MIRROR_WATCHER_H
+#define CEPHFS_MIRROR_MIRROR_WATCHER_H
+
+#include <string_view>
+
+#include "common/ceph_mutex.h"
+#include "include/Context.h"
+#include "include/rados/librados.hpp"
+#include "Watcher.h"
+
+class ContextWQ;
+class Messenger;
+
+namespace cephfs {
+namespace mirror {
+
+class FSMirror;
+
+// watch for notifications via cephfs_mirror object (in metadata
+// pool). this is used sending keepalived with keepalive payload
+// being the rados instance address (used by the manager module
+// to blocklist when needed).
+
+class MirrorWatcher : public Watcher {
+public:
+  static MirrorWatcher *create(librados::IoCtx &ioctx, FSMirror *fs_mirror,
+                               ContextWQ *work_queue) {
+    return new MirrorWatcher(ioctx, fs_mirror, work_queue);
+  }
+
+  MirrorWatcher(librados::IoCtx &ioctx, FSMirror *fs_mirror,
+                ContextWQ *work_queue);
+  ~MirrorWatcher();
+
+  void init(Context *on_finish);
+  void shutdown(Context *on_finish);
+
+  void handle_notify(uint64_t notify_id, uint64_t handle,
+                     uint64_t notifier_id, bufferlist& bl) override;
+  void handle_rewatch_complete(int r) override;
+
+  bool is_blocklisted() {
+    std::scoped_lock locker(m_lock);
+    return m_blocklisted;
+  }
+
+  bool is_failed() {
+    std::scoped_lock locker(m_lock);
+    return m_failed;
+  }
+
+private:
+  librados::IoCtx &m_ioctx;
+  FSMirror *m_fs_mirror;
+  ContextWQ *m_work_queue;
+
+  ceph::mutex m_lock;
+  std::string m_instance_id;
+
+  Context *m_on_init_finish = nullptr;
+  Context *m_on_shutdown_finish = nullptr;
+
+  bool m_blocklisted = false;
+  bool m_failed = false;
+
+  void register_watcher();
+  void handle_register_watcher(int r);
+
+  void unregister_watcher();
+  void handle_unregister_watcher(int r);
+};
+
+} // namespace mirror
+} // namespace cephfs
+
+#endif // CEPHFS_MIRROR_MIRROR_WATCHER_H