initial code repo

[stor4nfv.git] / src / ceph / src / journal / ObjectRecorder.h

diff --git a/src/ceph/src/journal/ObjectRecorder.h b/src/ceph/src/journal/ObjectRecorder.h
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+++ b/src/ceph/src/journal/ObjectRecorder.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_JOURNAL_OBJECT_RECORDER_H
+#define CEPH_JOURNAL_OBJECT_RECORDER_H
+
+#include "include/Context.h"
+#include "include/rados/librados.hpp"
+#include "common/Cond.h"
+#include "common/Mutex.h"
+#include "common/RefCountedObj.h"
+#include "common/WorkQueue.h"
+#include "journal/FutureImpl.h"
+#include <list>
+#include <map>
+#include <set>
+#include <boost/intrusive_ptr.hpp>
+#include <boost/noncopyable.hpp>
+#include "include/assert.h"
+
+class SafeTimer;
+
+namespace journal {
+
+class ObjectRecorder;
+typedef boost::intrusive_ptr<ObjectRecorder> ObjectRecorderPtr;
+
+typedef std::pair<FutureImplPtr, bufferlist> AppendBuffer;
+typedef std::list<AppendBuffer> AppendBuffers;
+
+class ObjectRecorder : public RefCountedObject, boost::noncopyable {
+public:
+  struct Handler {
+    virtual ~Handler() {
+    }
+    virtual void closed(ObjectRecorder *object_recorder) = 0;
+    virtual void overflow(ObjectRecorder *object_recorder) = 0;
+  };
+
+  ObjectRecorder(librados::IoCtx &ioctx, const std::string &oid,
+                 uint64_t object_number, std::shared_ptr<Mutex> lock,
+                 ContextWQ *work_queue, SafeTimer &timer, Mutex &timer_lock,
+                 Handler *handler, uint8_t order, uint32_t flush_interval,
+                 uint64_t flush_bytes, double flush_age);
+  ~ObjectRecorder() override;
+
+  inline uint64_t get_object_number() const {
+    return m_object_number;
+  }
+  inline const std::string &get_oid() const {
+    return m_oid;
+  }
+
+  bool append_unlock(AppendBuffers &&append_buffers);
+  void flush(Context *on_safe);
+  void flush(const FutureImplPtr &future);
+
+  void claim_append_buffers(AppendBuffers *append_buffers);
+
+  bool is_closed() const {
+    assert(m_lock->is_locked());
+    return (m_object_closed && m_in_flight_appends.empty());
+  }
+  bool close();
+
+  inline CephContext *cct() const {
+    return m_cct;
+  }
+
+  inline size_t get_pending_appends() const {
+    Mutex::Locker locker(*m_lock);
+    return m_append_buffers.size();
+  }
+
+private:
+  typedef std::set<uint64_t> InFlightTids;
+  typedef std::map<uint64_t, AppendBuffers> InFlightAppends;
+
+  struct FlushHandler : public FutureImpl::FlushHandler {
+    ObjectRecorder *object_recorder;
+    FlushHandler(ObjectRecorder *o) : object_recorder(o) {}
+    void get() override {
+      object_recorder->get();
+    }
+    void put() override {
+      object_recorder->put();
+    }
+    void flush(const FutureImplPtr &future) override {
+      Mutex::Locker locker(*(object_recorder->m_lock));
+      object_recorder->flush(future);
+    }
+  };
+  struct C_AppendFlush : public Context {
+    ObjectRecorder *object_recorder;
+    uint64_t tid;
+    C_AppendFlush(ObjectRecorder *o, uint64_t _tid)
+        : object_recorder(o), tid(_tid) {
+      object_recorder->get();
+    }
+    void finish(int r) override {
+      object_recorder->handle_append_flushed(tid, r);
+      object_recorder->put();
+    }
+  };
+
+  librados::IoCtx m_ioctx;
+  std::string m_oid;
+  uint64_t m_object_number;
+  CephContext *m_cct;
+
+  ContextWQ *m_op_work_queue;
+
+  SafeTimer &m_timer;
+  Mutex &m_timer_lock;
+
+  Handler *m_handler;
+
+  uint8_t m_order;
+  uint64_t m_soft_max_size;
+
+  uint32_t m_flush_interval;
+  uint64_t m_flush_bytes;
+  double m_flush_age;
+
+  FlushHandler m_flush_handler;
+
+  Context *m_append_task = nullptr;
+
+  mutable std::shared_ptr<Mutex> m_lock;
+  AppendBuffers m_append_buffers;
+  uint64_t m_append_tid;
+  uint32_t m_pending_bytes;
+
+  InFlightTids m_in_flight_tids;
+  InFlightAppends m_in_flight_appends;
+  uint64_t m_size;
+  bool m_overflowed;
+  bool m_object_closed;
+
+  bufferlist m_prefetch_bl;
+
+  bool m_in_flight_flushes;
+  Cond m_in_flight_flushes_cond;
+
+  AppendBuffers m_pending_buffers;
+  bool m_aio_scheduled;
+
+  void handle_append_task();
+  void cancel_append_task();
+  void schedule_append_task();
+
+  bool append(const AppendBuffer &append_buffer, bool *schedule_append);
+  bool flush_appends(bool force);
+  void handle_append_flushed(uint64_t tid, int r);
+  void append_overflowed();
+  void send_appends(AppendBuffers *append_buffers);
+  void send_appends_aio();
+
+  void notify_handler_unlock();
+};
+
+} // namespace journal
+
+#endif // CEPH_JOURNAL_OBJECT_RECORDER_H