ceph/src/journal/JournalRecorder.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef CEPH_JOURNAL_JOURNAL_RECORDER_H
   5 #define CEPH_JOURNAL_JOURNAL_RECORDER_H
   6
   7 #include "include/int_types.h"
   8 #include "include/Context.h"
   9 #include "include/rados/librados.hpp"
  10 #include "common/Mutex.h"
  11 #include "journal/Future.h"
  12 #include "journal/FutureImpl.h"
  13 #include "journal/JournalMetadata.h"
  14 #include "journal/ObjectRecorder.h"
  15 #include <map>
  16 #include <string>
  17
  18 class SafeTimer;
  19
  20 namespace journal {
  21
  22 class JournalRecorder {
  23 public:
  24   JournalRecorder(librados::IoCtx &ioctx, const std::string &object_oid_prefix,
  25                   const JournalMetadataPtr &journal_metadata,
  26                   uint64_t max_in_flight_appends);
  27   ~JournalRecorder();
  28
  29   void shut_down(Context *on_safe);
  30
  31   void set_append_batch_options(int flush_interval, uint64_t flush_bytes,
  32                                 double flush_age);
  33
  34   Future append(uint64_t tag_tid, const bufferlist &bl);
  35   void flush(Context *on_safe);
  36
  37   ObjectRecorderPtr get_object(uint8_t splay_offset);
  38
  39 private:
  40   typedef std::map<uint8_t, ObjectRecorderPtr> ObjectRecorderPtrs;
  41
  42   struct Listener : public JournalMetadataListener {
  43     JournalRecorder *journal_recorder;
  44
  45     Listener(JournalRecorder *_journal_recorder)
  46       : journal_recorder(_journal_recorder) {}
  47
  48     void handle_update(JournalMetadata *) override {
  49       journal_recorder->handle_update();
  50     }
  51   };
  52
  53   struct ObjectHandler : public ObjectRecorder::Handler {
  54     JournalRecorder *journal_recorder;
  55
  56     ObjectHandler(JournalRecorder *_journal_recorder)
  57       : journal_recorder(_journal_recorder) {
  58     }
  59
  60     void closed(ObjectRecorder *object_recorder) override {
  61       journal_recorder->handle_closed(object_recorder);
  62     }
  63     void overflow(ObjectRecorder *object_recorder) override {
  64       journal_recorder->handle_overflow(object_recorder);
  65     }
  66   };
  67
  68   struct C_AdvanceObjectSet : public Context {
  69     JournalRecorder *journal_recorder;
  70
  71     C_AdvanceObjectSet(JournalRecorder *_journal_recorder)
  72       : journal_recorder(_journal_recorder) {
  73     }
  74     void finish(int r) override {
  75       journal_recorder->handle_advance_object_set(r);
  76     }
  77   };
  78
  79   librados::IoCtx m_ioctx;
  80   CephContext *m_cct;
  81   std::string m_object_oid_prefix;
  82
  83   JournalMetadataPtr m_journal_metadata;
  84
  85   uint32_t m_flush_interval = 0;
  86   uint64_t m_flush_bytes = 0;
  87   double m_flush_age = 0;
  88   uint64_t m_max_in_flight_appends;
  89
  90   Listener m_listener;
  91   ObjectHandler m_object_handler;
  92
  93   Mutex m_lock;
  94
  95   uint32_t m_in_flight_advance_sets = 0;
  96   uint32_t m_in_flight_object_closes = 0;
  97   uint64_t m_current_set;
  98   ObjectRecorderPtrs m_object_ptrs;
  99   std::vector<std::shared_ptr<Mutex>> m_object_locks;
 100
 101   FutureImplPtr m_prev_future;
 102
 103   Context *m_on_object_set_advanced = nullptr;
 104
 105   void open_object_set();
 106   bool close_object_set(uint64_t active_set);
 107
 108   void advance_object_set();
 109   void handle_advance_object_set(int r);
 110
 111   void close_and_advance_object_set(uint64_t object_set);
 112
 113   ObjectRecorderPtr create_object_recorder(uint64_t object_number,
 114                                            std::shared_ptr<Mutex> lock);
 115   void create_next_object_recorder(ObjectRecorderPtr object_recorder);
 116
 117   void handle_update();
 118
 119   void handle_closed(ObjectRecorder *object_recorder);
 120   void handle_overflow(ObjectRecorder *object_recorder);
 121
 122   void lock_object_recorders() {
 123     for (auto& lock : m_object_locks) {
 124       lock->Lock();
 125     }
 126   }
 127
 128   void unlock_object_recorders() {
 129     for (auto& lock : m_object_locks) {
 130       lock->Unlock();
 131     }
 132   }
 133 };
 134
 135 } // namespace journal
 136
 137 #endif // CEPH_JOURNAL_JOURNAL_RECORDER_H