#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)

bool	IsStale (const catalog::DirectoryEntry &dirent)

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 932 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_open(), and 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 1096 of file glue_buffer.h.

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

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EvictRaii glue::PageCacheTracker::GetEvictRaii ( )

inline

Definition at line 1092 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 1036 of file glue_buffer.h.

Referenced by cvmfs::cvmfs_getattr().

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Statistics glue::PageCacheTracker::GetStatistics ( )

inline

Definition at line 1020 of file glue_buffer.h.

Referenced by TalkManager::MainResponder(), and perf::TelemetryAggregator::ManuallyUpdateSelectedCounters().

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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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bool glue::PageCacheTracker::IsStale ( const catalog::DirectoryEntry & dirent )

inline

Checks if the dirent's inode is registered in the page cache tracker and if

it is currently open and has a different content than dirent
it has been previously found stale (no matter if now open or not)

Definition at line 1057 of file glue_buffer.h.

Referenced by cvmfs::FixupOpenInode().

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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 1111 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 961 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 1099 of file glue_buffer.h.

Referenced by CopyFrom().

pthread_mutex_t* glue::PageCacheTracker::lock_

private

Definition at line 1104 of file glue_buffer.h.

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

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

private

Definition at line 1113 of file glue_buffer.h.

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

StatStore glue::PageCacheTracker::stat_store_

private

Definition at line 1114 of file glue_buffer.h.

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

Statistics glue::PageCacheTracker::statistics_

private

Definition at line 1112 of file glue_buffer.h.

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

unsigned glue::PageCacheTracker::version_

private

Definition at line 1105 of file glue_buffer.h.

Referenced by CopyFrom().

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

Classes

Public Member Functions

Static Public Attributes

Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation