Go to the documentation of this file.
2 * Copyright (C) 1996-2023 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 */
12#include "store/Controlled.h"
13#include "store/forward.h"
15namespace Store {
18class Disks: public Controlled
21 Disks();
23 /* Storage API */
24 void create() override;
25 void init() override;
26 StoreEntry *get(const cache_key *) override;
27 uint64_t maxSize() const override;
28 uint64_t minSize() const override;
29 uint64_t currentSize() const override;
30 uint64_t currentCount() const override;
31 int64_t maxObjectSize() const override;
32 void getStats(StoreInfoStats &stats) const override;
33 void stat(StoreEntry &) const override;
34 void sync() override;
35 void reference(StoreEntry &) override;
36 bool dereference(StoreEntry &e) override;
37 void updateHeaders(StoreEntry *) override;
38 void maintain() override;
39 bool anchorToCache(StoreEntry &) override;
40 bool updateAnchored(StoreEntry &) override;
41 void evictCached(StoreEntry &) override;
42 void evictIfFound(const cache_key *) override;
43 int callback() override;
46 void configure();
48 static void Parse(DiskConfig &);
50 static void Dump(const DiskConfig &, StoreEntry &, const char *name);
54 int64_t accumulateMore(const StoreEntry&) const;
56 static bool SmpAware();
57 static SwapDir *SelectSwapDir(const StoreEntry *);
59 bool hasReadableEntry(const StoreEntry &) const;
62 /* migration logic */
63 SwapDir *store(int const x) const;
64 static SwapDir &Dir(int const idx);
71} // namespace Store
73/* Store::Disks globals that should be converted to use RegisteredRunner */
74void storeDirOpenSwapLogs(void);
75int storeDirWriteCleanLogs(int reopen);
76void storeDirCloseSwapLogs(void);
78/* Globals that should be converted to static Store::Disks methods */
82/* Globals that should be moved to some Store::UFS-specific logging module */
83void storeDirSwapLog(const StoreEntry *e, int op);
85#endif /* SQUID_STORE_DISKS_H */
void storeDirCloseSwapLogs(void)
Definition: Disks.cc:683
void storeDirOpenSwapLogs(void)
Definition: Disks.cc:676
void free_cachedir(Store::DiskConfig *swap)
Definition: Disks.cc:805
void storeDirSwapLog(const StoreEntry *e, int op)
Definition: Disks.cc:838
void allocate_new_swapdir(Store::DiskConfig &swap)
Definition: Disks.cc:786
int storeDirWriteCleanLogs(int reopen)
Definition: Disks.cc:699
High-level store statistics used by mgr:info action. Used inside PODs!
Definition: StoreStats.h:14
manages a single cache_dir
Definition: Disk.h:22
summary view of all disk caches (cache_dirs) combined
Definition: Disks.h:19
void reference(StoreEntry &) override
somebody needs this entry (many cache replacement policies need to know)
Definition: Disks.cc:545
void create() override
create system resources needed for this store to operate in the future
Definition: Disks.cc:220
int64_t maxObjectSize() const override
the maximum size of a storable object; -1 if unlimited
Definition: Disks.cc:374
int64_t secondLargestMaximumObjectSize
the second-biggest Disk::maxObjectSize()
Definition: Disks.h:68
void evictCached(StoreEntry &) override
Definition: Disks.cc:586
static void Dump(const DiskConfig &, StoreEntry &, const char *name)
prints the configuration into the provided StoreEntry
Definition: Disks.cc:468
uint64_t currentCount() const override
the total number of objects stored right now
Definition: Disks.cc:361
bool dereference(StoreEntry &e) override
Definition: Disks.cc:551
bool hasReadableEntry(const StoreEntry &) const
whether any of disk caches has entry with e.key
Definition: Disks.cc:667
void getStats(StoreInfoStats &stats) const override
collect statistics
Definition: Disks.cc:516
void configure()
update configuration, including limits (re)calculation
Definition: Disks.cc:380
SwapDir * store(int const x) const
Definition: Disks.cc:176
uint64_t currentSize() const override
current size
Definition: Disks.cc:348
int64_t largestMaximumObjectSize
maximum of all Disk::maxObjectSize()s
Definition: Disks.h:67
uint64_t minSize() const override
the minimum size the store will shrink to via normal housekeeping
Definition: Disks.cc:335
void maintain() override
perform regular periodic maintenance; TODO: move to UFSSwapDir::Maintain
Definition: Disks.cc:564
void evictIfFound(const cache_key *) override
Definition: Disks.cc:603
int64_t accumulateMore(const StoreEntry &) const
Definition: Disks.cc:479
bool updateAnchored(StoreEntry &) override
Definition: Disks.cc:641
void sync() override
prepare for shutdown
Definition: Disks.cc:579
void updateHeaders(StoreEntry *) override
make stored metadata and HTTP headers the same as in the given entry
Definition: Disks.cc:557
void stat(StoreEntry &) const override
Definition: Disks.cc:532
int64_t largestMinimumObjectSize
maximum of all Disk::minObjectSize()s
Definition: Disks.h:66
static SwapDir * SelectSwapDir(const StoreEntry *)
Definition: Disks.cc:661
int callback() override
called once every main loop iteration; TODO: Move to UFS code.
Definition: Disks.cc:188
StoreEntry * get(const cache_key *) override
Definition: Disks.cc:233
void init() override
Definition: Disks.cc:259
bool anchorToCache(StoreEntry &) override
Definition: Disks.cc:612
uint64_t maxSize() const override
Definition: Disks.cc:322
static SwapDir & Dir(int const idx)
Definition: Disks.cc:182
static void Parse(DiskConfig &)
parses a single cache_dir configuration line
Definition: Disks.cc:415
static bool SmpAware()
whether any disk cache is SMP-aware
Definition: Disks.cc:648
class Ping::pingStats_ stats
unsigned char cache_key
Store key.
Definition: forward.h:29






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