initial code repo

[stor4nfv.git] / src / ceph / src / librbd / watcher / Notifier.h

diff --git a/src/ceph/src/librbd/watcher/Notifier.h b/src/ceph/src/librbd/watcher/Notifier.h
new file mode 100644 (file)
index 0000000..8b0ad37
--- /dev/null
+++ b/src/ceph/src/librbd/watcher/Notifier.h
@@ -0,0 +1,63 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_WATCHER_NOTIFIER_H
+#define CEPH_LIBRBD_WATCHER_NOTIFIER_H
+
+#include "include/int_types.h"
+#include "include/buffer_fwd.h"
+#include "include/Context.h"
+#include "include/rados/librados.hpp"
+#include "common/Mutex.h"
+#include "common/WorkQueue.h"
+#include <list>
+
+namespace librbd {
+
+namespace watcher {
+
+struct NotifyResponse;
+
+class Notifier {
+public:
+  static const uint64_t NOTIFY_TIMEOUT;
+
+  Notifier(ContextWQ *work_queue, librados::IoCtx &ioctx,
+           const std::string &oid);
+  ~Notifier();
+
+  void flush(Context *on_finish);
+  void notify(bufferlist &bl, NotifyResponse *response, Context *on_finish);
+
+private:
+  typedef std::list<Context*> Contexts;
+
+  struct C_AioNotify : public Context {
+    Notifier *notifier;
+    NotifyResponse *response;
+    Context *on_finish;
+    bufferlist out_bl;
+
+    C_AioNotify(Notifier *notifier, NotifyResponse *response,
+                Context *on_finish);
+
+    void finish(int r) override;
+  };
+
+  ContextWQ *m_work_queue;
+  librados::IoCtx &m_ioctx;
+  CephContext *m_cct;
+  std::string m_oid;
+
+  Mutex m_aio_notify_lock;
+  size_t m_pending_aio_notifies = 0;
+  Contexts m_aio_notify_flush_ctxs;
+
+  void handle_notify(int r, Context *on_finish);
+
+};
+
+} // namespace watcher
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_WATCHER_NOTIFIER_H