src/store/Disks.h

   1 /*
   2  * Copyright (C) 1996-2016 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef SQUID_STORE_DISKS_H
  10 #define SQUID_STORE_DISKS_H
  11
  12 #include "store/Controlled.h"
  13 #include "store/forward.h"
  14
  15 namespace Store {
  16
  17 /// summary view of all disk caches (cache_dirs) combined
  18 class Disks: public Controlled
  19 {
  20 public:
  21     /* Storage API */
  22     virtual void create() override;
  23     virtual void init() override;
  24     virtual StoreEntry *get(const cache_key *) override;
  25     virtual uint64_t maxSize() const override;
  26     virtual uint64_t minSize() const override;
  27     virtual uint64_t currentSize() const override;
  28     virtual uint64_t currentCount() const override;
  29     virtual int64_t maxObjectSize() const override;
  30     virtual void getStats(StoreInfoStats &stats) const override;
  31     virtual void stat(StoreEntry &) const override;
  32     virtual void sync() override;
  33     virtual void reference(StoreEntry &) override;
  34     virtual bool dereference(StoreEntry &e) override;
  35     virtual void updateHeaders(StoreEntry *) override;
  36     virtual void maintain() override;
  37     virtual bool anchorCollapsed(StoreEntry &e, bool &inSync) override;
  38     virtual bool updateCollapsed(StoreEntry &e) override;
  39     virtual void markForUnlink(StoreEntry &) override;
  40     virtual void unlink(StoreEntry &) override;
  41     virtual int callback() override;
  42
  43 private:
  44     /* migration logic */
  45     SwapDir *store(int const x) const;
  46     SwapDir &dir(int const idx) const;
  47 };
  48
  49 } // namespace Store
  50
  51 /* Store::Disks globals that should be converted to use RegisteredRunner */
  52 void storeDirOpenSwapLogs(void);
  53 int storeDirWriteCleanLogs(int reopen);
  54 void storeDirCloseSwapLogs(void);
  55
  56 /* Globals that should be converted to static Store::Disks methods */
  57 void allocate_new_swapdir(Store::DiskConfig *swap);
  58 void free_cachedir(Store::DiskConfig *swap);
  59
  60 /* Globals that should be converted to Store::Disks private data members */
  61 typedef int STDIRSELECT(const StoreEntry *e);
  62 extern STDIRSELECT *storeDirSelectSwapDir;
  63
  64 /* Globals that should be moved to some Store::UFS-specific logging module */
  65 void storeDirSwapLog(const StoreEntry *e, int op);
  66
  67 #endif /* SQUID_STORE_DISKS_H */
  68