Inheritance diagram for RawFsFile:

Collaboration diagram for RawFsFile:

Public Member Functions
	RawFsFile (String name, class RawFs pFs, File pParent, Disk *pDisk)

virtual bool	sync ()

virtual bool	sync (size_t offset, bool async)

bool	shutdown ()

virtual uintptr_t	readBlock (uint64_t location)

virtual void	writeBlock (uint64_t location, uintptr_t address)

virtual bool	pinBlock (uint64_t location)

virtual void	unpinBlock (uint64_t location)

virtual size_t	getBlockSize () const

virtual void	fileAttributeChanged ()

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)

bool	syncRange (size_t offset, size_t length)

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 Attributes	getAttributes () const

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

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

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

virtual XattrStatus	removeExtendedAttribute (const StringView &name)

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)

virtual void	truncate ()

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

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

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)

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)

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)

Private Member Functions
	RawFsFile (const RawFsFile &file)

RawFsFile &	operator= (const RawFsFile &)

Static Private Member Functions
static bool	cacheCallback (CacheConstants::CallbackCause cause, uintptr_t location, uintptr_t page, void *context)

Private Attributes
Disk *	m_pDisk

Cache	m_PageCache

Mutex	m_PageCacheLock

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

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 bool	prepareWrite (uint64_t location, uint64_t size)

virtual bool	allowResize (size_t oldSize, size_t newSize)

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

virtual bool	resizeFile (size_t size)

virtual bool	allocateFileRange (size_t offset, size_t length)

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	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

virtual MUST_USE_RESULT uintptr_t	acquireCachedBlock (uint64_t location, bool retryChanged)

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 ()

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 32 of file RawFsFile.h.

Constructor & Destructor Documentation

◆ RawFsFile() [1/2]

RawFsFile::RawFsFile ( const RawFsFile & file )

private

Copy constructors are hidden - unused!

◆ RawFsFile() [2/2]

RawFsFile::RawFsFile	(	String	name,
		class RawFs *	pFs,
		File *	pParent,
		Disk *	pDisk
	)

Constructor, should only be called by RawFs.

Definition at line 31 of file RawFsFile.cc.

References Disk::getSize(), and Cache::setCallback().

◆ ~RawFsFile()

RawFsFile::~RawFsFile ( )

Definition at line 51 of file RawFsFile.cc.

Member Function Documentation

◆ cacheCallback()

bool RawFsFile::cacheCallback	(	CacheConstants::CallbackCause	cause,
		uintptr_t	location,
		uintptr_t	page,
		void *	context
	)

staticprivate

Definition at line 71 of file RawFsFile.cc.

◆ fileAttributeChanged()

virtual void RawFsFile::fileAttributeChanged ( )

inlinevirtual

Reimplemented from File.

Definition at line 53 of file RawFsFile.h.

◆ getBlockSize()

size_t RawFsFile::getBlockSize ( ) const

virtual

Function to retrieve the block size returned by readBlock.

Note: This must be constant throughout the life of the file.

Reimplemented from File.

Definition at line 87 of file RawFsFile.cc.

References PhysicalMemoryManager::getPageSize().

◆ pinBlock()

bool RawFsFile::pinBlock ( uint64_t location )

virtual

Pins the given page.

If your File subclass uses a Cache for readBlock, this method should be implemented to call Cache::pin. The VFS layer calls this method when it determines it is about to give a physical page to an upper layer, and therefore will be unable to guarantee the virtual page's dirty status is a correct reflection of the page's state.

Returns true only when the page currently published for location is held until the matching unpinBlock(). The base implementation returns false so a cache-backed subclass cannot silently claim unsafe pages.

Reimplemented from File.

Definition at line 164 of file RawFsFile.cc.

References PhysicalMemoryManager::getPageSize(), and Cache::pin().

◆ readBlock()

uintptr_t RawFsFile::readBlock ( uint64_t location )

virtual

Retrieves an aligned block with one caller-owned lifetime reference.

Every successful call must be balanced by exactly one unpinBlock() at the same location. Cache-backed implementations must acquire a reference in addition to the cache entry's publication reference on both hit and miss paths.

Reimplemented from File.

Definition at line 93 of file RawFsFile.cc.

References Cache::discardEditing(), PhysicalMemoryManager::getPageSize(), Cache::insert(), Cache::lookup(), Cache::markNoLongerEditing(), Disk::read(), and Disk::unpin().

Referenced by writeBlock().

Here is the caller graph for this function:

◆ shutdown()

bool RawFsFile::shutdown ( )

Definition at line 67 of file RawFsFile.cc.

◆ sync() [1/2]

bool RawFsFile::sync ( )

virtual

Sync all cached pages for the file back to disk.

Returns false if any cached page cannot be synchronised. Successful pages remain written when another page fails.

Reimplemented from File.

Definition at line 56 of file RawFsFile.cc.

References Cache::syncAll().

◆ sync() [2/2]

bool RawFsFile::sync	(	size_t	offset,
		bool	async
	)

virtual

Trigger a sync of an inner cache back to disk and report completion (or queue admission for an asynchronous request).

Reimplemented from File.

Definition at line 60 of file RawFsFile.cc.

References PhysicalMemoryManager::getPageSize(), and Cache::sync().

◆ unpinBlock()

void RawFsFile::unpinBlock ( uint64_t location )

virtual

Unpins the given page.

Reimplemented from File.

Definition at line 172 of file RawFsFile.cc.

References PhysicalMemoryManager::getPageSize(), and Cache::release().

◆ writeBlock()

void RawFsFile::writeBlock	(	uint64_t	location,
		uintptr_t	addr
	)

virtual

Internal function to write a block retrieved with readBlock back to the file. The address of the block is provided for convenience.

Reimplemented from File.

Definition at line 146 of file RawFsFile.cc.

References PhysicalMemoryManager::getPageSize(), Cache::markDirty(), readBlock(), and Cache::release().

Member Data Documentation

◆ m_PageCache

Cache RawFsFile::m_PageCache

private

Definition at line 59 of file RawFsFile.h.

◆ m_PageCacheLock

Mutex RawFsFile::m_PageCacheLock

private

Definition at line 60 of file RawFsFile.h.

◆ m_pDisk

Disk* RawFsFile::m_pDisk

private

Definition at line 58 of file RawFsFile.h.

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

Public Member Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ RawFsFile() [1/2]

◆ RawFsFile() [2/2]

◆ ~RawFsFile()

Member Function Documentation

◆ cacheCallback()

◆ fileAttributeChanged()

◆ getBlockSize()

◆ pinBlock()

◆ readBlock()

◆ shutdown()

◆ sync() [1/2]

◆ sync() [2/2]

◆ unpinBlock()

◆ writeBlock()

Member Data Documentation

◆ m_PageCache

◆ m_PageCacheLock

◆ m_pDisk