initial code repo

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

diff --git a/src/ceph/src/journal/JournalRecorder.h b/src/ceph/src/journal/JournalRecorder.h
new file mode 100644 (file)
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+++ b/src/ceph/src/journal/JournalRecorder.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_JOURNAL_RECORDER_H
+#define CEPH_JOURNAL_JOURNAL_RECORDER_H
+
+#include "include/int_types.h"
+#include "include/Context.h"
+#include "include/rados/librados.hpp"
+#include "common/Mutex.h"
+#include "journal/Future.h"
+#include "journal/FutureImpl.h"
+#include "journal/JournalMetadata.h"
+#include "journal/ObjectRecorder.h"
+#include <map>
+#include <string>
+
+class SafeTimer;
+
+namespace journal {
+
+class JournalRecorder {
+public:
+  JournalRecorder(librados::IoCtx &ioctx, const std::string &object_oid_prefix,
+                  const JournalMetadataPtr &journal_metadata,
+                  uint32_t flush_interval, uint64_t flush_bytes,
+                  double flush_age);
+  ~JournalRecorder();
+
+  Future append(uint64_t tag_tid, const bufferlist &bl);
+  void flush(Context *on_safe);
+
+  ObjectRecorderPtr get_object(uint8_t splay_offset);
+
+private:
+  typedef std::map<uint8_t, ObjectRecorderPtr> ObjectRecorderPtrs;
+
+  struct Listener : public JournalMetadataListener {
+    JournalRecorder *journal_recorder;
+
+    Listener(JournalRecorder *_journal_recorder)
+      : journal_recorder(_journal_recorder) {}
+
+    void handle_update(JournalMetadata *) override {
+      journal_recorder->handle_update();
+    }
+  };
+
+  struct ObjectHandler : public ObjectRecorder::Handler {
+    JournalRecorder *journal_recorder;
+
+    ObjectHandler(JournalRecorder *_journal_recorder)
+      : journal_recorder(_journal_recorder) {
+    }
+
+    void closed(ObjectRecorder *object_recorder) override {
+      journal_recorder->handle_closed(object_recorder);
+    }
+    void overflow(ObjectRecorder *object_recorder) override {
+      journal_recorder->handle_overflow(object_recorder);
+    }
+  };
+
+  struct C_AdvanceObjectSet : public Context {
+    JournalRecorder *journal_recorder;
+
+    C_AdvanceObjectSet(JournalRecorder *_journal_recorder)
+      : journal_recorder(_journal_recorder) {
+    }
+    void finish(int r) override {
+      journal_recorder->handle_advance_object_set(r);
+    }
+  };
+
+  librados::IoCtx m_ioctx;
+  CephContext *m_cct;
+  std::string m_object_oid_prefix;
+
+  JournalMetadataPtr m_journal_metadata;
+
+  uint32_t m_flush_interval;
+  uint64_t m_flush_bytes;
+  double m_flush_age;
+
+  Listener m_listener;
+  ObjectHandler m_object_handler;
+
+  Mutex m_lock;
+
+  uint32_t m_in_flight_advance_sets = 0;
+  uint32_t m_in_flight_object_closes = 0;
+  uint64_t m_current_set;
+  ObjectRecorderPtrs m_object_ptrs;
+  std::vector<std::shared_ptr<Mutex>> m_object_locks;
+
+  FutureImplPtr m_prev_future;
+
+  void open_object_set();
+  bool close_object_set(uint64_t active_set);
+
+  void advance_object_set();
+  void handle_advance_object_set(int r);
+
+  void close_and_advance_object_set(uint64_t object_set);
+
+  ObjectRecorderPtr create_object_recorder(uint64_t object_number,
+                                           std::shared_ptr<Mutex> lock);
+  void create_next_object_recorder_unlock(ObjectRecorderPtr object_recorder);
+
+  void handle_update();
+
+  void handle_closed(ObjectRecorder *object_recorder);
+  void handle_overflow(ObjectRecorder *object_recorder);
+
+  void lock_object_recorders() {
+    for (auto& lock : m_object_locks) {
+      lock->Lock();
+    }
+  }
+
+  void unlock_object_recorders() {
+    for (auto& lock : m_object_locks) {
+      lock->Unlock();
+    }
+  }
+};
+
+} // namespace journal
+
+#endif // CEPH_JOURNAL_JOURNAL_RECORDER_H