ceph/src/os/bluestore/FreelistManager.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_OS_BLUESTORE_FREELISTMANAGER_H
   5 #define CEPH_OS_BLUESTORE_FREELISTMANAGER_H
   6
   7 #include <string>
   8 #include <vector>
   9 #include <mutex>
  10 #include <ostream>
  11 #include "kv/KeyValueDB.h"
  12 #include "bluestore_types.h"
  13
  14 class FreelistManager {
  15   bool         null_manager = false;
  16 public:
  17   CephContext* cct;
  18   explicit FreelistManager(CephContext* cct) : cct(cct) {}
  19   virtual ~FreelistManager() {}
  20
  21   static FreelistManager *create(
  22     CephContext* cct,
  23     std::string type,
  24     std::string prefix);
  25
  26   static void setup_merge_operators(KeyValueDB *db, const std::string &type);
  27
  28   virtual int create(uint64_t size, uint64_t granularity,
  29                      uint64_t zone_size, uint64_t first_sequential_zone,
  30                      KeyValueDB::Transaction txn) = 0;
  31
  32   virtual int init(KeyValueDB *kvdb, bool db_in_read_only,
  33     std::function<int(const std::string&, std::string*)> cfg_reader) = 0;
  34   virtual void sync(KeyValueDB* kvdb) = 0;
  35   virtual void shutdown() = 0;
  36
  37   virtual void dump(KeyValueDB *kvdb) = 0;
  38
  39   virtual void enumerate_reset() = 0;
  40   virtual bool enumerate_next(KeyValueDB *kvdb, uint64_t *offset, uint64_t *length) = 0;
  41
  42   virtual void allocate(
  43     uint64_t offset, uint64_t length,
  44     KeyValueDB::Transaction txn) = 0;
  45   virtual void release(
  46     uint64_t offset, uint64_t length,
  47     KeyValueDB::Transaction txn) = 0;
  48
  49   virtual uint64_t get_size() const = 0;
  50   virtual uint64_t get_alloc_units() const = 0;
  51   virtual uint64_t get_alloc_size() const = 0;
  52
  53   virtual void get_meta(uint64_t target_size,
  54   std::vector<std::pair<std::string, std::string>>*) const = 0;
  55
  56   void set_null_manager() {
  57     null_manager = true;
  58   }
  59   bool is_null_manager() {
  60     return null_manager;
  61   }
  62 };
  63
  64
  65 #endif