initial code repo

[stor4nfv.git] / src / ceph / src / librbd / managed_lock / BreakRequest.h

diff --git a/src/ceph/src/librbd/managed_lock/BreakRequest.h b/src/ceph/src/librbd/managed_lock/BreakRequest.h
new file mode 100644 (file)
index 0000000..6f4f4ac
--- /dev/null
+++ b/src/ceph/src/librbd/managed_lock/BreakRequest.h
@@ -0,0 +1,112 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_MANAGED_LOCK_BREAK_REQUEST_H
+#define CEPH_LIBRBD_MANAGED_LOCK_BREAK_REQUEST_H
+
+#include "include/int_types.h"
+#include "include/buffer.h"
+#include "msg/msg_types.h"
+#include <list>
+#include <string>
+#include <boost/optional.hpp>
+#include "librbd/managed_lock/Types.h"
+
+class Context;
+class ContextWQ;
+class obj_watch_t;
+
+namespace librados { class IoCtx; }
+
+namespace librbd {
+
+class ImageCtx;
+template <typename> class Journal;
+
+namespace managed_lock {
+
+template <typename ImageCtxT = ImageCtx>
+class BreakRequest {
+public:
+  static BreakRequest* create(librados::IoCtx& ioctx, ContextWQ *work_queue,
+                              const std::string& oid, const Locker &locker,
+                              bool exclusive, bool blacklist_locker,
+                              uint32_t blacklist_expire_seconds,
+                              bool force_break_lock, Context *on_finish) {
+    return new BreakRequest(ioctx, work_queue, oid, locker, exclusive,
+                            blacklist_locker, blacklist_expire_seconds,
+                            force_break_lock, on_finish);
+  }
+
+  void send();
+
+private:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    v
+   * GET_WATCHERS
+   *    |
+   *    v
+   * GET_LOCKER
+   *    |
+   *    v
+   * BLACKLIST (skip if disabled)
+   *    |
+   *    v
+   * BREAK_LOCK
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endvertbatim
+   */
+
+  librados::IoCtx &m_ioctx;
+  CephContext *m_cct;
+  ContextWQ *m_work_queue;
+  std::string m_oid;
+  Locker m_locker;
+  bool m_exclusive;
+  bool m_blacklist_locker;
+  uint32_t m_blacklist_expire_seconds;
+  bool m_force_break_lock;
+  Context *m_on_finish;
+
+  bufferlist m_out_bl;
+
+  std::list<obj_watch_t> m_watchers;
+  int m_watchers_ret_val;
+
+  Locker m_refreshed_locker;
+
+  BreakRequest(librados::IoCtx& ioctx, ContextWQ *work_queue,
+               const std::string& oid, const Locker &locker,
+               bool exclusive, bool blacklist_locker,
+               uint32_t blacklist_expire_seconds, bool force_break_lock,
+               Context *on_finish);
+
+  void send_get_watchers();
+  void handle_get_watchers(int r);
+
+  void send_get_locker();
+  void handle_get_locker(int r);
+
+  void send_blacklist();
+  void handle_blacklist(int r);
+
+  void send_break_lock();
+  void handle_break_lock(int r);
+
+  void finish(int r);
+
+};
+
+} // namespace managed_lock
+} // namespace librbd
+
+extern template class librbd::managed_lock::BreakRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_MANAGED_LOCK_BREAK_REQUEST_H