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/ceph_mutex.h"
  11 #include "common/containers.h"
  12 #include "common/Timer.h"
  13 #include "journal/Future.h"
  14 #include "journal/FutureImpl.h"
  15 #include "journal/JournalMetadata.h"
  16 #include "journal/ObjectRecorder.h"
  17 #include <map>
  18 #include <string>
  19
  20 namespace journal {
  21
  22 class JournalRecorder {
  23 public:
  24   JournalRecorder(librados::IoCtx &ioctx, std::string_view object_oid_prefix,
  25                   ceph::ref_t<JournalMetadata> 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   ceph::ref_t<ObjectRecorder> get_object(uint8_t splay_offset);
  38
  39 private:
  40   typedef std::map<uint8_t, ceph::ref_t<ObjectRecorder>> ObjectRecorderPtrs;
  41   typedef std::vector<std::unique_lock<ceph::mutex>> Lockers;
  42
  43   struct Listener : public JournalMetadataListener {
  44     JournalRecorder *journal_recorder;
  45
  46     Listener(JournalRecorder *_journal_recorder)
  47       : journal_recorder(_journal_recorder) {}
  48
  49     void handle_update(JournalMetadata *) override {
  50       journal_recorder->handle_update();
  51     }
  52   };
  53
  54   struct ObjectHandler : public ObjectRecorder::Handler {
  55     JournalRecorder *journal_recorder;
  56
  57     ObjectHandler(JournalRecorder *_journal_recorder)
  58       : journal_recorder(_journal_recorder) {
  59     }
  60
  61     void closed(ObjectRecorder *object_recorder) override {
  62       journal_recorder->handle_closed(object_recorder);
  63     }
  64     void overflow(ObjectRecorder *object_recorder) override {
  65       journal_recorder->handle_overflow(object_recorder);
  66     }
  67   };
  68
  69   struct C_AdvanceObjectSet : public Context {
  70     JournalRecorder *journal_recorder;
  71
  72     C_AdvanceObjectSet(JournalRecorder *_journal_recorder)
  73       : journal_recorder(_journal_recorder) {
  74     }
  75     void finish(int r) override {
  76       journal_recorder->handle_advance_object_set(r);
  77     }
  78   };
  79
  80   librados::IoCtx m_ioctx;
  81   CephContext *m_cct = nullptr;
  82   std::string m_object_oid_prefix;
  83
  84   ceph::ref_t<JournalMetadata> m_journal_metadata;
  85
  86   uint32_t m_flush_interval = 0;
  87   uint64_t m_flush_bytes = 0;
  88   double m_flush_age = 0;
  89   uint64_t m_max_in_flight_appends;
  90
  91   Listener m_listener;
  92   ObjectHandler m_object_handler;
  93
  94   ceph::mutex m_lock = ceph::make_mutex("JournalerRecorder::m_lock");
  95
  96   uint32_t m_in_flight_advance_sets = 0;
  97   uint32_t m_in_flight_object_closes = 0;
  98   uint64_t m_current_set;
  99   ObjectRecorderPtrs m_object_ptrs;
 100   ceph::containers::tiny_vector<ceph::mutex> m_object_locks;
 101
 102   ceph::ref_t<FutureImpl> m_prev_future;
 103
 104   Context *m_on_object_set_advanced = nullptr;
 105
 106   void open_object_set();
 107   bool close_object_set(uint64_t active_set);
 108
 109   void advance_object_set();
 110   void handle_advance_object_set(int r);
 111
 112   void close_and_advance_object_set(uint64_t object_set);
 113
 114   ceph::ref_t<ObjectRecorder> create_object_recorder(uint64_t object_number,
 115                                            ceph::mutex* lock);
 116   bool create_next_object_recorder(ceph::ref_t<ObjectRecorder> object_recorder);
 117
 118   void handle_update();
 119
 120   void handle_closed(ObjectRecorder *object_recorder);
 121   void handle_overflow(ObjectRecorder *object_recorder);
 122
 123   Lockers lock_object_recorders();
 124 };
 125
 126 } // namespace journal
 127
 128 #endif // CEPH_JOURNAL_JOURNAL_RECORDER_H