#include <cache_posix.h>

Inheritance diagram for PosixCacheManager:

Collaboration diagram for PosixCacheManager:

Classes
struct	SavedState

struct	Transaction

Public Types
enum	CacheModes { kCacheReadWrite = 0, kCacheReadOnly }

enum	RenameWorkarounds { kRenameNormal = 0, kRenameLink, kRenameSamedir }

Public Member Functions
virtual CacheManagerIds	id ()

virtual std::string	Describe ()

virtual	~PosixCacheManager ()

virtual bool	AcquireQuotaManager (QuotaManager *quota_mgr)

virtual int	Open (const LabeledObject &object)

virtual int64_t	GetSize (int fd)

virtual int	Close (int fd)

virtual int64_t	Pread (int fd, void *buf, uint64_t size, uint64_t offset)

virtual int	Dup (int fd)

virtual int	Readahead (int fd)

virtual uint32_t	SizeOfTxn ()

virtual int	StartTxn (const shash::Any &id, uint64_t size, void *txn)

virtual void	CtrlTxn (const Label &label, const int flags, void *txn)

virtual int64_t	Write (const void buf, uint64_t size, void txn)

virtual int	Reset (void *txn)

virtual int	OpenFromTxn (void *txn)

virtual int	AbortTxn (void *txn)

virtual int	CommitTxn (void *txn)

virtual void	Spawn ()

virtual manifest::Breadcrumb	LoadBreadcrumb (const std::string &fqrn)

virtual bool	StoreBreadcrumb (const manifest::Manifest &manifest)

bool	StoreBreadcrumb (std::string fqrn, manifest::Breadcrumb breadcrumb)

void	TearDown2ReadOnly ()

CacheModes	cache_mode ()

bool	alien_cache ()

std::string	cache_path ()

bool	is_tmpfs ()

bool	do_refcount () const

Public Member Functions inherited from CacheManager
virtual	~CacheManager ()

int	ChecksumFd (int fd, shash::Any *id)

int	OpenPinned (const LabeledObject &object)

bool	Open2Mem (const LabeledObject &object, unsigned char *buffer, uint64_t size)

bool	CommitFromMem (const LabeledObject &object, const unsigned char *buffer, const uint64_t size)

QuotaManager *	quota_mgr ()

void *	SaveState (const int fd_progress)

int	RestoreState (const int fd_progress, void *state)

void	FreeState (const int fd_progress, void *state)

CacheManagerIds	PeekState (void *state)

Static Public Member Functions
static PosixCacheManager *	Create (const std::string &cache_path, const bool alien_cache, const RenameWorkarounds rename_workaround=kRenameNormal, const bool do_refcount=true)

Static Public Attributes
static const uint64_t	kBigFile = 25 * 1024 * 1024

Static Public Attributes inherited from CacheManager
static const uint64_t	kSizeUnknown = uint64_t(-1)

static const int	kLabelCatalog = 0x01

static const int	kLabelPinned = 0x02

static const int	kLabelVolatile = 0x04

static const int	kLabelExternal = 0x08

static const int	kLabelChunked = 0x10

static const int	kLabelCertificate = 0x20

static const int	kLabelMetainfo = 0x40

static const int	kLabelHistory = 0x80

Protected Member Functions
virtual void *	DoSaveState ()

virtual int	DoRestoreState (void *data)

virtual bool	DoFreeState (void *data)

Protected Member Functions inherited from CacheManager
	CacheManager ()

Private Member Functions
	FRIEND_TEST (T_CacheManager, CommitTxnQuotaNotifications)

	FRIEND_TEST (T_CacheManager, CommitTxnRenameFail)

	FRIEND_TEST (T_CacheManager, Open)

	FRIEND_TEST (T_CacheManager, OpenFromTxn)

	FRIEND_TEST (T_CacheManager, OpenPinned)

	FRIEND_TEST (T_CacheManager, Rename)

	FRIEND_TEST (T_CacheManager, StartTxn)

	FRIEND_TEST (T_CacheManager, TearDown2ReadOnly)

bool	InitCacheDirectory (const string &cache_path)

	PosixCacheManager (const std::string &cache_path, const bool alien_cache, const bool do_refcount=true)

std::string	GetPathInCache (const shash::Any &id)

int	Rename (const char oldpath, const char newpath)

int	Flush (Transaction *transaction)

Private Attributes
std::string	cache_path_

std::string	txn_template_path_

bool	alien_cache_

RenameWorkarounds	rename_workaround_

CacheModes	cache_mode_

atomic_int32	no_inflight_txns_

bool	reports_correct_filesize_

bool	is_tmpfs_

bool	do_refcount_

UniquePtr< FdRefcountMgr >	fd_mgr_

Static Private Attributes
static const char	kMagicRefcount = 123

static const char	kMagicNoRefcount = '\0'

Additional Inherited Members
Protected Attributes inherited from CacheManager
QuotaManager *	quota_mgr_

Detailed Description

Cache manager implementation using a file system (cache directory) as a backing storage.

Definition at line 40 of file cache_posix.h.

Member Enumeration Documentation

enum PosixCacheManager::CacheModes

Enumerator
kCacheReadWrite
kCacheReadOnly

Definition at line 51 of file cache_posix.h.

enum PosixCacheManager::RenameWorkarounds

Enumerator
kRenameNormal
kRenameLink
kRenameSamedir

Definition at line 56 of file cache_posix.h.

Constructor & Destructor Documentation

virtual PosixCacheManager::~PosixCacheManager ( )

inlinevirtual

Definition at line 77 of file cache_posix.h.

PosixCacheManager::PosixCacheManager	(	const std::string &	cache_path,
		const bool	alien_cache,
		const bool	do_refcount = `true`
	)

inlineprivate

Definition at line 142 of file cache_posix.h.

Member Function Documentation

int PosixCacheManager::AbortTxn ( void * txn )

virtual

Implements CacheManager.

Definition at line 113 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_abort_txn(), and anonymous_namespace{cvmfs_cache_posix.cc}::posix_commit_txn().

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bool PosixCacheManager::AcquireQuotaManager ( QuotaManager * quota_mgr )

virtual

This should only be used to replace the default NoopQuotaManager by a PosixQuotaManager. The cache manager takes the ownership of the passed quota manager.

Implements CacheManager.

Definition at line 131 of file cache_posix.cc.

bool PosixCacheManager::alien_cache ( )

inline

Definition at line 106 of file cache_posix.h.

Referenced by FileSystem::SetupNfsMaps().

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CacheModes PosixCacheManager::cache_mode ( )

inline

Definition at line 105 of file cache_posix.h.

Referenced by TalkManager::MainResponder().

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std::string PosixCacheManager::cache_path ( )

inline

Definition at line 107 of file cache_posix.h.

Referenced by FileSystem::SetupNfsMaps().

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int PosixCacheManager::Close ( int fd )

virtual

Implements CacheManager.

Definition at line 140 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_chrefcnt().

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int PosixCacheManager::CommitTxn ( void * txn )

virtual

Implements CacheManager.

Definition at line 148 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_commit_txn().

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PosixCacheManager * PosixCacheManager::Create	(	const std::string &	cache_path,
		const bool	alien_cache,
		const RenameWorkarounds	rename_workaround = `kRenameNormal`,
		const bool	do_refcount = `true`
	)

static

Definition at line 272 of file cache_posix.cc.

Referenced by main(), and FileSystem::SetupPosixCacheMgr().

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void PosixCacheManager::CtrlTxn	(	const Label &	label,
		const int	flags,
		void *	txn
	)

virtual

Implements CacheManager.

Definition at line 293 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_start_txn().

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string PosixCacheManager::Describe ( )

virtual

Return a human readable description of the cache instance. Used in cvmfs_talk.

Implements CacheManager.

Definition at line 303 of file cache_posix.cc.

bool PosixCacheManager::do_refcount ( ) const

inline

Definition at line 109 of file cache_posix.h.

bool PosixCacheManager::DoFreeState ( void * data )

protectedvirtual

Reimplemented from CacheManager.

Definition at line 361 of file cache_posix.cc.

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int PosixCacheManager::DoRestoreState ( void * data )

protectedvirtual

Reimplemented from CacheManager.

Definition at line 331 of file cache_posix.cc.

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void * PosixCacheManager::DoSaveState ( )

protectedvirtual

If not refcounting, nothing to do, the kernel keeps the state of open file descriptors. Return a dummy memory location.

Reimplemented from CacheManager.

Definition at line 319 of file cache_posix.cc.

int PosixCacheManager::Dup ( int fd )

virtual

Implements CacheManager.

Definition at line 376 of file cache_posix.cc.

int PosixCacheManager::Flush ( Transaction * transaction )

private

Definition at line 384 of file cache_posix.cc.

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		CommitTxnQuotaNotifications
	)

private

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		CommitTxnRenameFail
	)

private

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		Open
	)

private

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		OpenFromTxn
	)

private

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		OpenPinned
	)

private

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		Rename
	)

private

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		StartTxn
	)

private

PosixCacheManager::FRIEND_TEST	(	T_CacheManager	,
		TearDown2ReadOnly
	)

private

string PosixCacheManager::GetPathInCache ( const shash::Any & id )

inlineprivate

Definition at line 400 of file cache_posix.cc.

int64_t PosixCacheManager::GetSize ( int fd )

virtual

Implements CacheManager.

Definition at line 405 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_chrefcnt(), and anonymous_namespace{cvmfs_cache_posix.cc}::posix_commit_txn().

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virtual CacheManagerIds PosixCacheManager::id ( )

inlinevirtual

Implements CacheManager.

Definition at line 69 of file cache_posix.h.

bool PosixCacheManager::InitCacheDirectory ( const string & cache_path )

private

Definition at line 231 of file cache_posix.cc.

Referenced by Create().

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bool PosixCacheManager::is_tmpfs ( )

inline

Definition at line 108 of file cache_posix.h.

manifest::Breadcrumb PosixCacheManager::LoadBreadcrumb ( const std::string & )

virtual

While not strictly necessary, cache managers often have a directory associated with them. This directory is currently used to find the cached manifest copy, the cvmfschecksum.$reponame file. This is important to make pre-loaded alien caches work, even in a tiered setup.

Reimplemented from CacheManager.

Definition at line 596 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_breadcrumb_load().

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int PosixCacheManager::Open ( const LabeledObject & object )

virtual

Opening an object might get it from a third-party source, e.g. when the tiered cache manager issues a copy-up operation. In this case it is beneficial to register the object with the accurate meta-data, in the same way it is done during transactions.

Implements CacheManager.

Definition at line 414 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_chrefcnt().

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int PosixCacheManager::OpenFromTxn ( void * txn )

virtual

Implements CacheManager.

Definition at line 434 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_commit_txn().

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int64_t PosixCacheManager::Pread	(	int	fd,
		void *	buf,
		uint64_t	size,
		uint64_t	offset
	)

virtual

Implements CacheManager.

Definition at line 452 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_pread().

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int PosixCacheManager::Readahead ( int fd )

virtual

Used by the sqlite vfs in order to preload file catalogs into the file system buffers.

No-op if the fd is to a file that is on a tmpfs, and so already in page cache

Implements CacheManager.

Definition at line 499 of file cache_posix.cc.

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int PosixCacheManager::Rename	(	const char *	oldpath,
		const char *	newpath
	)

private

Definition at line 469 of file cache_posix.cc.

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int PosixCacheManager::Reset ( void * txn )

virtual

Implements CacheManager.

Definition at line 517 of file cache_posix.cc.

virtual uint32_t PosixCacheManager::SizeOfTxn ( )

inlinevirtual

Implements CacheManager.

Definition at line 87 of file cache_posix.h.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_start_txn().

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virtual void PosixCacheManager::Spawn ( )

inlinevirtual

Implements CacheManager.

Definition at line 98 of file cache_posix.h.

int PosixCacheManager::StartTxn	(	const shash::Any &	id,
		uint64_t	size,
		void *	txn
	)

virtual

Implements CacheManager.

Definition at line 531 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_start_txn().

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bool PosixCacheManager::StoreBreadcrumb ( const manifest::Manifest & manifest )

virtual

Reimplemented from CacheManager.

Definition at line 602 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_breadcrumb_store().

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bool PosixCacheManager::StoreBreadcrumb	(	std::string	fqrn,
		manifest::Breadcrumb	breadcrumb
	)

Definition at line 607 of file cache_posix.cc.

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void PosixCacheManager::TearDown2ReadOnly ( )

Definition at line 613 of file cache_posix.cc.

Referenced by FileSystem::TearDown2ReadOnly().

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int64_t PosixCacheManager::Write	(	const void *	buf,
		uint64_t	size,
		void *	txn
	)

virtual

Implements CacheManager.

Definition at line 624 of file cache_posix.cc.

Referenced by anonymous_namespace{cvmfs_cache_posix.cc}::posix_write_txn().

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Member Data Documentation

bool PosixCacheManager::alien_cache_

private

Definition at line 164 of file cache_posix.h.

Referenced by alien_cache().

CacheModes PosixCacheManager::cache_mode_

private

Definition at line 166 of file cache_posix.h.

Referenced by cache_mode().

std::string PosixCacheManager::cache_path_

private

Definition at line 162 of file cache_posix.h.

Referenced by cache_path().

bool PosixCacheManager::do_refcount_

private

Refcount and return only unique file descriptors

Definition at line 198 of file cache_posix.h.

Referenced by do_refcount().

UniquePtr<FdRefcountMgr> PosixCacheManager::fd_mgr_

private

Definition at line 199 of file cache_posix.h.

bool PosixCacheManager::is_tmpfs_

private

True if posixcache is on tmpfs (and with this already in RAM)

Definition at line 194 of file cache_posix.h.

Referenced by is_tmpfs().

const uint64_t PosixCacheManager::kBigFile = 25 * 1024 * 1024

static

As of 25M, a file is considered a "big file", which means it is dangerous to apply asynchronous semantics. On start of a transaction with a big file the cache is cleaned up opportunistically.

Definition at line 67 of file cache_posix.h.

const char PosixCacheManager::kMagicNoRefcount = '\0'

staticprivate

Definition at line 176 of file cache_posix.h.

const char PosixCacheManager::kMagicRefcount = 123

staticprivate

Definition at line 175 of file cache_posix.h.

atomic_int32 PosixCacheManager::no_inflight_txns_

private

The cache can only degrade to a read-only cache once all writable file descriptors from transactions are closed. This is indicated by a zero value in this variable.

Definition at line 173 of file cache_posix.h.

Referenced by PosixCacheManager().

RenameWorkarounds PosixCacheManager::rename_workaround_

private

Definition at line 165 of file cache_posix.h.

Referenced by Create().

bool PosixCacheManager::reports_correct_filesize_

private

Hack for HDFS which writes file sizes asynchronously.

Definition at line 189 of file cache_posix.h.

std::string PosixCacheManager::txn_template_path_

private

Definition at line 163 of file cache_posix.h.

The documentation for this class was generated from the following files:

/home/sftnight/jenkins/workspace/CvmfsDoxygen/label/docker-x86_64/cvmfs/cvmfs/cache_posix.h
/home/sftnight/jenkins/workspace/CvmfsDoxygen/label/docker-x86_64/cvmfs/cvmfs/cache_posix.cc

Classes

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation