glue::PageCacheTracker Class Reference

#include <glue_buffer.h>

Collaboration diagram for glue::PageCacheTracker:

Classes
struct	Entry
class	EvictRaii
struct	OpenDirectives
struct	Statistics

Public Member Functions
Statistics	GetStatistics ()
	PageCacheTracker ()
	PageCacheTracker (const PageCacheTracker &other)
PageCacheTracker &	operator= (const PageCacheTracker &other)
	~PageCacheTracker ()
OpenDirectives	Open (uint64_t inode, const shash::Any &hash, const struct stat &info)
OpenDirectives	OpenDirect ()
void	Close (uint64_t inode)
bool	GetInfoIfOpen (uint64_t inode, shash::Any *hash, struct stat *info)
EvictRaii	GetEvictRaii ()
void	Disable ()

Static Public Attributes
static const unsigned int	kBitDirectIo = 62

Private Member Functions
void	InitLock ()
void	CopyFrom (const PageCacheTracker &other)

Private Attributes
pthread_mutex_t *	lock_
unsigned	version_
bool	is_active_
Statistics	statistics_
SmallHashDynamic< uint64_t, Entry >	map_
StatStore	stat_store_

Static Private Attributes
static const unsigned	kVersion = 0

Detailed Description

Tracks the content hash associated to inodes of regular files whose content may be in the page cache. It is used in cvmfs_open() and cvmfs_close().

Definition at line 931 of file glue_buffer.h.

Constructor & Destructor Documentation

glue::PageCacheTracker::PageCacheTracker

(

)

Definition at line 269 of file glue_buffer.cc.

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glue::PageCacheTracker::PageCacheTracker ( const PageCacheTracker &  other )

explicit

Definition at line 281 of file glue_buffer.cc.

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glue::PageCacheTracker::~PageCacheTracker

(

)

Definition at line 275 of file glue_buffer.cc.

Referenced by RestoreState().

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Member Function Documentation

void glue::PageCacheTracker::Close

(

uint64_t

inode

)

Definition at line 406 of file glue_buffer.cc.

Referenced by cvmfs::cvmfs_release().

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void glue::PageCacheTracker::CopyFrom ( const PageCacheTracker &  other )

private

Definition at line 297 of file glue_buffer.cc.

Referenced by operator=(), and PageCacheTracker().

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void glue::PageCacheTracker::Disable ( )

inline

Definition at line 1054 of file glue_buffer.h.

Referenced by MountPoint::CreateTables(), and RestoreState().

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EvictRaii glue::PageCacheTracker::GetEvictRaii ( )

inline

Definition at line 1050 of file glue_buffer.h.

Referenced by cvmfs::cvmfs_forget().

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bool glue::PageCacheTracker::GetInfoIfOpen ( uint64_t  inode, shash::Any *  hash, struct stat *  info  )

inline

Definition at line 1035 of file glue_buffer.h.

Referenced by cvmfs::cvmfs_getattr(), and cvmfs::FixupOpenInode().

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Statistics glue::PageCacheTracker::GetStatistics ( )

inline

Definition at line 1019 of file glue_buffer.h.

Referenced by TalkManager::MainResponder().

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void glue::PageCacheTracker::InitLock ( )

private

Definition at line 310 of file glue_buffer.cc.

Referenced by PageCacheTracker().

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PageCacheTracker::OpenDirectives glue::PageCacheTracker::Open	(	uint64_t	inode,
		const shash::Any &	hash,
		const struct stat &	info
	)

Definition at line 317 of file glue_buffer.cc.

Referenced by cvmfs::cvmfs_open().

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PageCacheTracker::OpenDirectives glue::PageCacheTracker::OpenDirect

(

)

Forced direct I/O open. Used when the corresponding flag is set in the file catalogs. In this case, we don't need to track the inode.

Definition at line 395 of file glue_buffer.cc.

Referenced by cvmfs::cvmfs_open().

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PageCacheTracker & glue::PageCacheTracker::operator=

(

const PageCacheTracker &

other

)

Definition at line 287 of file glue_buffer.cc.

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Member Data Documentation

bool glue::PageCacheTracker::is_active_

private

The page cache tracker only works correctly if it is used from the start of the mount. If the instance is hot-patched from a previous version, the page cache tracker remains turned off.

Definition at line 1069 of file glue_buffer.h.

Referenced by Close(), CopyFrom(), Disable(), Open(), and OpenDirect().

const unsigned int glue::PageCacheTracker::kBitDirectIo = 62

static

In the fuse file handle, use bit 62 to indicate that the file was opened with a direct I/O setting and cvmfs_release() should not call Close(). Note that the sign bit (bit 63) indicates chunked files.

Definition at line 960 of file glue_buffer.h.

Referenced by cvmfs::cvmfs_read(), cvmfs::cvmfs_release(), and cvmfs::FillOpenFlags().

const unsigned glue::PageCacheTracker::kVersion = 0

staticprivate

Definition at line 1057 of file glue_buffer.h.

Referenced by CopyFrom().

pthread_mutex_t* glue::PageCacheTracker::lock_

private

Definition at line 1062 of file glue_buffer.h.

Referenced by Close(), glue::PageCacheTracker::EvictRaii::EvictRaii(), GetInfoIfOpen(), InitLock(), Open(), OpenDirect(), operator=(), and ~PageCacheTracker().

SmallHashDynamic<uint64_t, Entry> glue::PageCacheTracker::map_

private

Definition at line 1071 of file glue_buffer.h.

Referenced by Close(), CopyFrom(), GetInfoIfOpen(), Open(), and PageCacheTracker().

StatStore glue::PageCacheTracker::stat_store_

private

Definition at line 1072 of file glue_buffer.h.

Referenced by Close(), CopyFrom(), GetInfoIfOpen(), and Open().

Statistics glue::PageCacheTracker::statistics_

private

Definition at line 1070 of file glue_buffer.h.

Referenced by CopyFrom(), GetStatistics(), Open(), and OpenDirect().

unsigned glue::PageCacheTracker::version_

private

Definition at line 1063 of file glue_buffer.h.

Referenced by CopyFrom().

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

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