Inheritance diagram for MemFdFile:

Collaboration diagram for MemFdFile:

Public Member Functions
	MemFdFile (const String &name, bool allowSealing, size_t uid, size_t gid)

Attributes	getAttributes () const override

int	getSeals ()

int	addSeals (unsigned seals)

bool	allowMapping (bool shared, bool writeRequested, bool &mayWrite) override

Public Member Functions inherited from RamFile
	RamFile (const String &name, uintptr_t inode, Filesystem pParentFS, File pParent)

bool	addLink ()

void	removeLink ()

XattrStatus	getExtendedAttribute (const StringView &name, void *buffer, size_t capacity, size_t &required) override

XattrStatus	listExtendedAttributes (void *buffer, size_t capacity, size_t &required) override

XattrStatus	setExtendedAttribute (const StringView &name, const void *value, size_t length, unsigned flags) override

XattrStatus	removeExtendedAttribute (const StringView &name) override

virtual void	truncate () override

bool	canWrite ()

Public Member Functions inherited from File
	File ()

	File (const String &name, Time::Timestamp accessedTime, Time::Timestamp modifiedTime, Time::Timestamp creationTime, uintptr_t inode, class Filesystem pFs, size_t size, File pParent)

virtual	~File ()

virtual uint64_t	read (uint64_t location, uint64_t size, uintptr_t buffer, bool bCanBlock=true) final

size_t	readCached (uint64_t location, size_t size, uintptr_t buffer, bool(*prepare)(uintptr_t, size_t)=nullptr)

virtual uint64_t	write (uint64_t location, uint64_t size, uintptr_t buffer, bool bCanBlock=true) final

uint64_t	append (uint64_t size, uintptr_t buffer, uint64_t &location, bool bCanBlock=true)

WriteGuard	lockWrites ()

virtual physical_uintptr_t	getPhysicalPage (size_t offset)

virtual bool	isDirectPhysicalMapping () const

size_t	physicalMappingFlags () const

virtual void	returnPhysicalPage (size_t offset)

virtual bool	tryBeginMappingRelease ()

void	endMappingRelease ()

bool	syncAndReturnPhysicalPage (size_t offset, bool async)

virtual bool	sync ()

bool	syncRange (size_t offset, size_t length)

virtual bool	sync (size_t offset, bool async)

virtual bool	syncPages (const uint64_t *offsets, size_t count)

Time::Timestamp	getCreationTime ()

void	setCreationTime (Time::Timestamp t)

Time::Timestamp	getAccessedTime ()

void	setAccessedTime (Time::Timestamp t)

Time::Timestamp	getModifiedTime ()

void	setModifiedTime (Time::Timestamp t)

void	setTimes (Time::Timestamp accessed, Time::Timestamp modified, bool changeAccessed, bool changeModified)

virtual bool	prepareSharedMapping (size_t offset, size_t length)

String	getName () const

void	getName (String &s) const

virtual void	getFullPath (String &result, bool bWithMount=true)

virtual String	getFullPath (bool bWithMount=true)

bool	resize (size_t size)

virtual size_t	getSize ()

void	setSize (size_t sz)

virtual bool	isSymlink ()

virtual bool	isDirectory ()

virtual bool	isBlockDevice () const

virtual uint64_t	deviceNumber () const

virtual bool	isPipe () const

virtual bool	isFifo () const

virtual bool	isSocket () const

virtual bool	isSeekable () const

bool	supportsRegularFileOperations ()

virtual bool	isCharacterDevice () const

virtual bool	isConsole () const

virtual uint64_t	maximumFileSize () const

bool	acquireMappingUse (bool executable, bool sharedWrite)

void	releaseMappingUse (bool executable, bool sharedWrite)

uintptr_t	getInode () const

virtual void	setInode (uintptr_t inode)

virtual uintptr_t	futexIdentity ()

Filesystem *	getFilesystem () const

void	setFilesystem (Filesystem *pFs)

virtual void	fileAttributeChanged ()

void	publishEvent (FileEventMask mask, const StringView &name=StringView(), bool targetIsDirectory=false)

virtual FileHandleStatus	subscribeInodeEvents (FileEventMask mask, const SharedPointer< FileEventObserver > &observer, FileEventSubscription &subscription)

virtual void	finishInodeRetirement ()

virtual void	increaseRefCount (bool bIsWriter)

virtual void	decreaseRefCount (bool bIsWriter)

virtual bool	retainVfsReference ()

virtual void	releaseVfsReference ()

virtual bool	isStableVfsRoot () const

void	setPermissions (uint32_t perms)

uint32_t	getPermissions () const

bool	setOwnership (size_t uid, size_t gid, bool changeUid, bool changeGid)

void	setUid (size_t uid)

size_t	getUid () const

void	setGid (size_t gid)

size_t	getGid () const

File *	getParent () const

void	getNamespace (ParentLease &parent, String &name) const

virtual int	select (bool bWriting=false, int timeout=0)

virtual ReadyMask	queryReady (bool reading, bool writing)

virtual bool	supportsReadinessNotifications () const

void	monitor (Thread pThread, Event pEvent)

void	cullMonitorTargets (Thread *pThread)

void	cullMonitorTargets (Event *pEvent)

virtual bool	supports (const size_t command) const

virtual int	command (const size_t command, void *buffer)

virtual size_t	getBlockSize () const

void	markPageExternallyWritable (size_t offset)

size_t	populateRange (size_t offset, size_t length)

void	enableDirect ()

void	disableDirect ()

virtual void	preallocate (size_t expectedSize, bool zero=true)

bool	allocateRange (size_t offset, size_t length, bool keepSize=false)

virtual File *	open ()

virtual File *	openForDescriptor (RetainedFile &owner)

Public Member Functions inherited from ReadinessSource
MUST_USE_RESULT bool	subscribeReadiness (ReadyMask interest, const SharedPointer< ReadinessObserver > &observer, ReadinessSubscription &subscription)

virtual ReadinessGenerations	readinessGenerations ()

Public Member Functions inherited from FileEventSource
MUST_USE_RESULT bool	subscribeFileEvents (FileEventMask interest, const SharedPointer< FileEventObserver > &observer, FileEventSubscription &subscription)

Static Public Member Functions
static MemFdFile *	fromFile (File *file)

Protected Member Functions
bool	prepareWrite (uint64_t location, uint64_t size) override

bool	allowResize (size_t oldSize, size_t newSize) override

Protected Member Functions inherited from RamFile
virtual bool	resizeFile (size_t size) override

virtual bool	allocateFileRange (size_t offset, size_t length) override

virtual bool	prepareShrink (const ShrinkContext &context, UniquePointer< PreparedShrink > &prepared) override

virtual uintptr_t	readBlock (uint64_t location) override

virtual bool	pinBlock (uint64_t location) override

uintptr_t	acquireCachedBlock (uint64_t location, bool retryChanged) override

virtual void	unpinBlock (uint64_t location) override

Protected Member Functions inherited from File
bool	tryAcquireFilesystemOperation (OperationBarrier::Lease &operation) const

virtual void	updateAttributes (const Attributes &attributes, uint32_t mask)

virtual bool	changeOwnership (size_t uid, size_t gid, bool changeUid, bool changeGid)

virtual bool	allowPhysicalPage () const

virtual Mutex &	writeSerializationLock ()

virtual Mutex &	dataMutationLock ()

virtual size_t &	physicalPageLoans ()

bool	clearDataCache ()

virtual bool	isBytewise () const

virtual uint64_t	readBytewise (uint64_t location, uint64_t size, uintptr_t buffer, bool bCanBlock=true)

virtual uint64_t	writeBytewise (uint64_t location, uint64_t size, uintptr_t buffer, bool bCanBlock=true)

virtual bool	readPage (uint64_t location, uintptr_t destination)

virtual bool	readPages (ReadPage *pages, size_t count)

virtual void	writeBlock (uint64_t location, uintptr_t addr)

virtual void	writeBlocks (uint64_t location, uintptr_t addr, size_t length)

virtual void	extend (size_t newSize)

virtual void	extend (size_t newSize, uint64_t location, uint64_t size)

virtual void	publishInodeEvent (const FileEvent &event)

void	dataChanged ()

void	getFilesystemLabel (HugeStaticString &s)

void	enableFillCacheWriteback ()

void	shutdownFillCacheWriteback ()

bool	syncFillCache (size_t offset, bool async, bool &present)

virtual bool	useFillCache () const

void	evict (uint64_t location)

void	setPermissionsOnly (uint32_t perms)

void	setUidOnly (size_t uid)

void	setGidOnly (size_t gid)

void	retainDetachedParent ()

void	moveNamespace (const String &name, File *parent)

bool	snapshotNamespace (ParentLease &parent, String &name, FileEventMask interest) const

virtual CacheState &	cacheState ()

void	setPhysicalMappingFlags (size_t flags)

Protected Member Functions inherited from ReadinessSource
void	notifyReadiness (ReadyMask mask)

void	closeReadiness (ReadyMask mask=ReadyInvalid\|ReadyHangup)

Protected Member Functions inherited from FileEventSource
bool	hasFileEventObservers (FileEventMask mask) const

void	notifyFileEvent (const FileEvent &event)

void	notifyFinalFileEvent (const FileEvent &event)

void	beginFinalFileEvent (const FileEvent &event)

void	drainFileEvents ()

void	closeFileEvents ()

Private Attributes
unsigned	m_Seals

Additional Inherited Members
Public Types inherited from File
enum	AttributeMask : uint32_t { AccessTime = 1U << 0 , ModifyTime = 1U << 1 , ChangeTime = 1U << 2 , Owner = 1U << 3 , Group = 1U << 4 , Permissions = 1U << 5 }

Static Public Attributes inherited from File
static constexpr size_t	MaxReadPages = 32

Static Protected Member Functions inherited from File
static bool	writeCallback (CacheConstants::CallbackCause cause, uintptr_t loc, uintptr_t page, void *meta)

static bool	fillCacheCallback (CacheConstants::CallbackCause cause, uintptr_t loc, uintptr_t page, void *meta)

Static Protected Member Functions inherited from FileEventSource
static bool	anyFileEventObservers ()

Protected Attributes inherited from File
String	m_Name

Time::Timestamp	m_AccessedTime

Time::Timestamp	m_ModifiedTime

Time::Timestamp	m_CreationTime

uintptr_t	m_Inode

uintptr_t	m_FutexIdentity = 0

class Filesystem *	m_pFilesystem

size_t	m_Size

File *	m_pParent

Mutex	m_MetadataLock

File *	m_pDetachedParent

bool	m_bDetachedParentHandled

size_t	m_nWriters

size_t	m_nReaders

size_t	m_Uid

size_t	m_Gid

uint32_t	m_Permissions

CacheState	m_CacheState

bool	m_bDirect

Mutex	m_WriteLock

Mutex	m_DataMutationLock

size_t	m_PhysicalPageLoans = 0

size_t	m_PhysicalMappingFlags = 0

Mutex	m_Lock

List< MonitorTarget * >	m_MonitorTargets

Detailed Description

Definition at line 14 of file memfd-file.h.

Constructor & Destructor Documentation

◆ MemFdFile()

MemFdFile::MemFdFile	(	const String &	name,
		bool	allowSealing,
		size_t	uid,
		size_t	gid
	)

Definition at line 23 of file memfd-file.cc.

Member Function Documentation

◆ addSeals()

int MemFdFile::addSeals ( unsigned seals )

Definition at line 51 of file memfd-file.cc.

◆ allowMapping()

bool MemFdFile::allowMapping	(	bool	shared,
		bool	writeRequested,
		bool &	mayWrite
	)

overridevirtual

Admit a new mapping and restrict its later write upgrades if needed.

Reimplemented from File.

Definition at line 83 of file memfd-file.cc.

◆ allowResize()

bool MemFdFile::allowResize	(	size_t	oldSize,
		size_t	newSize
	)

overrideprotectedvirtual

Reimplemented from File.

Definition at line 110 of file memfd-file.cc.

◆ fromFile()

MemFdFile * MemFdFile::fromFile ( File * file )

static

Definition at line 36 of file memfd-file.cc.

◆ getAttributes()

File::Attributes MemFdFile::getAttributes ( ) const

overridevirtual

Reimplemented from RamFile.

Definition at line 40 of file memfd-file.cc.

◆ getSeals()

int MemFdFile::getSeals ( )

Definition at line 46 of file memfd-file.cc.

◆ prepareWrite()

bool MemFdFile::prepareWrite	(	uint64_t	location,
		uint64_t	size
	)

overrideprotectedvirtual

Reimplemented from File.

Definition at line 95 of file memfd-file.cc.

Member Data Documentation

◆ m_Seals

unsigned MemFdFile::m_Seals

private

Definition at line 30 of file memfd-file.h.

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

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MemFdFile()

Member Function Documentation

◆ addSeals()

◆ allowMapping()

◆ allowResize()

◆ fromFile()

◆ getAttributes()

◆ getSeals()

◆ prepareWrite()

Member Data Documentation

◆ m_Seals