#include <VFS.h>

Collaboration diagram for VFS:

Classes
struct	ActiveInvocation

struct	CallbackState

class	FilesystemPin

struct	MountCallbackItem

class	MountIdentity

struct	MountInfo

class	MountOperation

struct	MountSnapshot

class	NamespaceMutation

struct	ProbeCallbackItem

struct	TrackedFile

Public Types
typedef void(*	MountCallback) ()

Public Member Functions
uint64_t	namespaceGeneration () const

VfsMountView *	mountView () const

VfsMountView *	bootMountView () const

bool	shutdownMountView (Vector< Filesystem * > &ownedBackings)

bool	initialiseMountView ()

bool	acquireMount (Filesystem *key, MountOperation &operation) const

bool	pinFilesystem (Filesystem *key, FilesystemPin &pin) const

bool	diskMount (uint32_t id, MountIdentity &identity) const

bool	snapshotDiskMounts (Vector< MountIdentity > &mounts) const

	VFS ()

	~VFS ()

bool	mount (Disk pDisk, String &stableName, Filesystem *pMountedFs=nullptr)

String	registerFilesystem (Filesystem *pFs, const String &preferredStableName)

bool	unregisterFilesystem (Filesystem *pFs, bool canDelete=true, bool terminal=false)

bool	retireOwnedFilesystem (Filesystem *filesystem)

bool	removeDiskFilesystem (Filesystem *filesystem, bool deviceAvailable=false)

bool	setRootFilesystem (Filesystem *pFs)

Filesystem *	getRootFilesystem () const

bool	getMountPath (Filesystem *pFs, String &path) const

Filesystem *	getFilesystemAt (const String &path) const

void	getMounts (Vector< MountSnapshot > &mounts) const

Filesystem::SyncStatus	syncFilesystem (Filesystem *key)

Filesystem::SyncStatus	syncAll ()

bool	removeEphemeralFiles ()

File *	find (const String &path, File *pStartNode=0)

File *	findRetained (const String &path, Directory::ChildLease &result, File *pStartNode=nullptr)

bool	createFile (const String &path, uint32_t mask, File *pStartNode=0)

bool	createDirectory (const String &path, uint32_t mask, File *pStartNode=0)

bool	createSymlink (const String &path, const String &value, File *pStartNode=0)

bool	createLink (const String &path, File target, File pStartNode=0)

bool	remove (const String &path, File *pStartNode=0)

bool	remove (const String &path, File pStartNode, File expected)

bool	rename (const String &oldPath, File oldStart, const String &newPath, File newStart, bool noReplace=false)

void	addProbeCallback (Filesystem::ProbeCallback callback)

bool	removeProbeCallback (Filesystem::ProbeCallback callback)

void	addMountCallback (MountCallback callback)

bool	removeMountCallback (MountCallback callback)

void	trackFile (File *pFile)
	Track a File object that exists. It is necessary to keep track of File objects, or at least those that are stored in Directory caches and Filesystem objects, such that they can be correctly tidied up when no more usages exist.

bool	tryTrackFile (File *pFile)

MUST_USE_RESULT bool	retainTrackedFile (File *pFile)

bool	untrackFile (File *pFile, bool destroy=true)

Static Public Member Functions
static Module::UnloadAdmission	unloadAdmission (bool terminal)

static VFS &	instance ()

static bool	checkAccess (File *pFile, bool bRead, bool bWrite, bool bExecute)

static bool	checkAccess (File *file, bool read, bool write, bool execute, const FilesystemCredentials &credentials)

static bool	checkAccess (File *pFile, bool bRead, bool bWrite, bool bExecute, int64_t userId, int64_t groupId, const Vector< int64_t > &supplementalGroups)

Private Types
typedef Tree< Filesystem , MountInfo >	MountTable

Private Member Functions
RcuPointer< TrackedFile > &	trackedFileBucket (File *file)

bool	trackFileLocked (File *file)

ProbeCallbackItem *	acquireProbeCallback (size_t &afterSequence, size_t boundary, ActiveInvocation &invocation)

MountCallbackItem *	acquireMountCallback (size_t &afterSequence, size_t boundary, ActiveInvocation &invocation)

void	finishCallback (CallbackState *state, ActiveInvocation &invocation)

void	drainProbeCallback (ProbeCallbackItem *item)

void	drainMountCallback (MountCallbackItem *item)

void	dispatchMountCallbacks (void *owner)

bool	isCallbackInvocation (void *owner) const

File *	resolveStartNode (const String &path, File *pStartNode)

String	registerFilesystemLocked (Filesystem *pFs, const String &preferredStableName)

String	getUniqueStableNameLocked (const String &preferredName) const

bool	attachFilesystem (Filesystem pRootFs, Filesystem pFs, const String &path)

void	attachRegisteredFilesystemsLocked ()

void	getMountsLocked (Vector< MountSnapshot > &mounts) const

Private Attributes
Mutex	m_PathMutationLock

uint64_t	m_PathGeneration

VfsMountView *	m_MountView

Mutex	m_MountMutationLock

Mutex	m_MountTableLock

Filesystem *	m_pRootFilesystem

MountTable	m_Mounts

List< ProbeCallbackItem * >	m_ProbeCallbacks

List< MountCallbackItem * >	m_MountCallbacks

Spinlock	m_CallbackLock

size_t	m_NextCallbackSequence

ActiveInvocation *	m_pActiveCallbacks

bool	m_CallbacksClosing

LruCache< String, File * >	m_FindCache

Mutex	m_TrackedFilesLock

RcuPointer< TrackedFile >	m_TrackedFiles [TrackedFileBuckets]

Static Private Attributes
static constexpr size_t	TrackedFileBuckets = 256

static VFS	m_Instance

static File *	m_EmptyFile

Detailed Description

Set to zero to disable the builtin VFS LRU caches. This class implements a single-root virtual filesystem namespace.

Definition at line 58 of file VFS.h.

Member Typedef Documentation

◆ MountCallback

typedef void(* VFS::MountCallback) ()

Callback type, called when a disk is mounted or unmounted.

Definition at line 190 of file VFS.h.

◆ MountTable

typedef Tree<Filesystem*, MountInfo*> VFS::MountTable

private

Definition at line 369 of file VFS.h.

Constructor & Destructor Documentation

◆ VFS()

VFS::VFS ( )

Constructor

Definition at line 315 of file VFS.cc.

◆ ~VFS()

VFS::~VFS ( )

Destructor

Definition at line 335 of file VFS.cc.

References Spinlock::acquire(), Tree< K, E >::begin(), Tree< K, E >::clear(), Tree< K, E >::end(), Vector< T >::pushBack(), and Spinlock::release().

Member Function Documentation

◆ acquireMount()

bool VFS::acquireMount	(	Filesystem *	key,
		MountOperation &	operation
	)		const

Compares key without dereferencing it, then admits live filesystem access.

Definition at line 290 of file VFS.cc.

References Tree< K, E >::lookup().

◆ acquireMountCallback()

VFS::MountCallbackItem * VFS::acquireMountCallback	(	size_t &	afterSequence,
		size_t	boundary,
		ActiveInvocation &	invocation
	)

private

Definition at line 1283 of file VFS.cc.

◆ acquireProbeCallback()

VFS::ProbeCallbackItem * VFS::acquireProbeCallback	(	size_t &	afterSequence,
		size_t	boundary,
		ActiveInvocation &	invocation
	)

private

Definition at line 1253 of file VFS.cc.

◆ addMountCallback()

void VFS::addMountCallback ( MountCallback callback )

Adds a mount callback - the function is called when a disk is mounted or unmounted. Duplicate registration is idempotent and revives an entry closed by a deferred removal which has no external drainer.

Definition at line 1151 of file VFS.cc.

References Spinlock::acquire(), and Spinlock::release().

◆ addProbeCallback()

void VFS::addProbeCallback ( Filesystem::ProbeCallback callback )

Adds a filesystem probe callback - this is called when a device is mounted. Duplicate registration is idempotent and revives an entry closed by a deferred removal which has no external drainer.

Definition at line 1050 of file VFS.cc.

References Spinlock::acquire(), and Spinlock::release().

◆ attachFilesystem()

bool VFS::attachFilesystem	(	Filesystem *	pRootFs,
		Filesystem *	pFs,
		const String &	path
	)

private

Definition at line 1791 of file VFS.cc.

◆ attachRegisteredFilesystemsLocked()

void VFS::attachRegisteredFilesystemsLocked ( )

private

Definition at line 1857 of file VFS.cc.

◆ bootMountView()

VfsMountView * VFS::bootMountView ( ) const

Definition at line 37 of file VFS-mount-view.cc.

◆ checkAccess() [1/3]

bool VFS::checkAccess	(	File *	file,
		bool	read,
		bool	write,
		bool	execute,
		const FilesystemCredentials &	credentials
	)

static

Definition at line 1539 of file VFS.cc.

◆ checkAccess() [2/3]

bool VFS::checkAccess	(	File *	pFile,
		bool	bRead,
		bool	bWrite,
		bool	bExecute
	)

static

Checks if the current user can access the given file.

Definition at line 1502 of file VFS.cc.

References checkAccess().

Referenced by UnixSocketSyscalls::bind(), checkAccess(), checkAccess(), Filesystem::createDirectory(), Filesystem::createFile(), Filesystem::createLink(), Filesystem::createSymlink(), Filesystem::findNode(), PosixSubsystem::invoke(), and Filesystem::remove().

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◆ checkAccess() [3/3]

bool VFS::checkAccess	(	File *	pFile,
		bool	bRead,
		bool	bWrite,
		bool	bExecute,
		int64_t	userId,
		int64_t	groupId,
		const Vector< int64_t > &	supplementalGroups
	)

static

Checks access using an explicit, immutable credential snapshot.

Definition at line 1521 of file VFS.cc.

References checkAccess(), and Vector< T >::count().

◆ createDirectory()

bool VFS::createDirectory	(	const String &	path,
		uint32_t	mask,
		File *	pStartNode = `0`
	)

Attempts to create a directory.

Definition at line 1464 of file VFS.cc.

References Filesystem::createDirectory().

◆ createFile()

bool VFS::createFile	(	const String &	path,
		uint32_t	mask,
		File *	pStartNode = `0`
	)

Attempts to create a file.

Definition at line 1459 of file VFS.cc.

References Filesystem::createFile().

◆ createLink()

bool VFS::createLink	(	const String &	path,
		File *	target,
		File *	pStartNode = `0`
	)

Attempts to create a hard link.

Definition at line 1479 of file VFS.cc.

References Filesystem::createLink().

◆ createSymlink()

bool VFS::createSymlink	(	const String &	path,
		const String &	value,
		File *	pStartNode = `0`
	)

Attempts to create a symlink.

Definition at line 1474 of file VFS.cc.

References Filesystem::createSymlink().

◆ diskMount()

bool VFS::diskMount	(	uint32_t	id,
		MountIdentity &	identity
	)		const

Definition at line 1913 of file VFS.cc.

◆ dispatchMountCallbacks()

void VFS::dispatchMountCallbacks ( void * owner )

private

Definition at line 1429 of file VFS.cc.

◆ drainMountCallback()

void VFS::drainMountCallback ( MountCallbackItem * item )

private

Definition at line 1385 of file VFS.cc.

◆ drainProbeCallback()

void VFS::drainProbeCallback ( ProbeCallbackItem * item )

private

Definition at line 1341 of file VFS.cc.

◆ find()

File * VFS::find	(	const String &	path,
		File *	pStartNode = `0`
	)

Attempts to obtain a File for a specific path.

Definition at line 1023 of file VFS.cc.

References Filesystem::find(), and String::view().

Referenced by ProcFs::initialise().

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◆ findRetained()

File * VFS::findRetained	(	const String &	path,
		Directory::ChildLease &	result,
		File *	pStartNode = `nullptr`
	)

Find a File while retaining its VFS lifetime in result.

Definition at line 1042 of file VFS.cc.

References Filesystem::findRetained(), and String::view().

Referenced by Symlink::followLinkRetained(), DynamicLinker::loadObject(), DynamicLinker::loadProgram(), removeDiskFilesystem(), and unregisterFilesystem().

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◆ finishCallback()

void VFS::finishCallback	(	CallbackState *	state,
		ActiveInvocation &	invocation
	)

private

Definition at line 1313 of file VFS.cc.

◆ getFilesystemAt()

Filesystem * VFS::getFilesystemAt ( const String & path ) const

Find the filesystem mounted at an exact absolute path. The returned pointer is borrowed and is not pinned against unregistration.

Definition at line 843 of file VFS.cc.

References Tree< K, E >::begin(), and Tree< K, E >::end().

◆ getMountPath()

bool VFS::getMountPath	(	Filesystem *	pFs,
		String &	path
	)		const

Obtain the canonical mount path for a filesystem.

Definition at line 832 of file VFS.cc.

References Tree< K, E >::lookup().

Referenced by mount().

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◆ getMounts()

void VFS::getMounts ( Vector< MountSnapshot > & mounts ) const

Copies a detached snapshot of all mounted filesystems.

Definition at line 854 of file VFS.cc.

◆ getMountsLocked()

void VFS::getMountsLocked ( Vector< MountSnapshot > & mounts ) const

private

Definition at line 859 of file VFS.cc.

◆ getRootFilesystem()

Filesystem * VFS::getRootFilesystem ( ) const

Returns a borrowed pointer; the lookup does not pin filesystem lifetime.

Definition at line 742 of file VFS.cc.

Referenced by mount(), removeDiskFilesystem(), and MountService::serve().

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◆ getUniqueStableNameLocked()

String VFS::getUniqueStableNameLocked ( const String & preferredName ) const

private

Definition at line 1738 of file VFS.cc.

◆ initialiseMountView()

bool VFS::initialiseMountView ( )

Definition at line 50 of file VFS-mount-view.cc.

◆ instance()

VFS & VFS::instance ( )

static

Returns the singleton VFS instance.

Definition at line 311 of file VFS.cc.

References m_Instance.

Referenced by Directory::addCachedDirectoryEntry(), Directory::addDirectoryEntry(), Directory::addEphemeralFile(), UnixSocketSyscalls::bind(), Directory::enumerate(), Filesystem::findNode(), Filesystem::findParent(), Symlink::followLinkRetained(), File::getFullPath(), SysFs::initialise(), DevFs::initialise(), ProcFs::initialise(), DynamicLinker::loadObject(), DynamicLinker::loadProgram(), Directory::lookupChildAt(), PtmxFile::open(), File::releaseVfsReference(), Filesystem::removeChild(), Directory::removeEphemeralFiles(), File::retainDetachedParent(), Symlink::retainTarget(), File::retainVfsReference(), MountService::serve(), and File::~File().

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◆ isCallbackInvocation()

bool VFS::isCallbackInvocation ( void * owner ) const

private

Definition at line 1448 of file VFS.cc.

◆ mount()

bool VFS::mount	(	Disk *	pDisk,
		String &	stableName,
		Filesystem **	pMountedFs = `nullptr`
	)

Probe and register a filesystem backed by a disk.

Definition at line 419 of file VFS.cc.

References Spinlock::acquire(), getMountPath(), getRootFilesystem(), Filesystem::getVolumeLabel(), ProcessorBase::information(), registerFilesystem(), Spinlock::release(), and unregisterFilesystem().

Referenced by removeEphemeralFiles().

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◆ mountView()

VfsMountView * VFS::mountView ( ) const

Definition at line 25 of file VFS-mount-view.cc.

◆ namespaceGeneration()

uint64_t VFS::namespaceGeneration ( ) const

Odd while a namespace writer owns admission; readers never hold it for I/O.

Definition at line 22 of file VFS-mount-view.cc.

◆ pinFilesystem()

bool VFS::pinFilesystem	(	Filesystem *	key,
		FilesystemPin &	pin
	)		const

Definition at line 189 of file VFS.cc.

◆ registerFilesystem()

String VFS::registerFilesystem	(	Filesystem *	pFs,
		const String &	preferredStableName
	)

Register a filesystem for mounting under /media/<stable-name>.

Definition at line 534 of file VFS.cc.

Referenced by mount().

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◆ registerFilesystemLocked()

String VFS::registerFilesystemLocked	(	Filesystem *	pFs,
		const String &	preferredStableName
	)

private

Definition at line 539 of file VFS.cc.

◆ remove() [1/2]

bool VFS::remove	(	const String &	path,
		File *	pStartNode,
		File *	expected
	)

Remove a path only if its terminal entry still has the expected identity.

Definition at line 1488 of file VFS.cc.

References Filesystem::remove().

◆ remove() [2/2]

bool VFS::remove	(	const String &	path,
		File *	pStartNode = `0`
	)

Attempts to remove a file/directory/symlink. WILL FAIL IF DIRECTORY NOT EMPTY

Definition at line 1484 of file VFS.cc.

References remove().

Referenced by remove().

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◆ removeDiskFilesystem()

bool VFS::removeDiskFilesystem	(	Filesystem *	filesystem,
		bool	deviceAvailable = `false`
	)

Withdraw a removed disk's mounts while retained paths keep inert nodes alive.

Definition at line 660 of file VFS.cc.

References OperationBarrier::close(), Filesystem::deviceRemoved(), findRetained(), InodeEventSource::finishRetirement(), Directory::fromFile(), getRootFilesystem(), File::isDirectory(), Tree< K, E >::lookup(), Directory::setReparsePoint(), Tree< K, E >::take(), and OperationBarrier::wait().

◆ removeEphemeralFiles()

bool VFS::removeEphemeralFiles ( )

Retire transient names before their providers unload; namespace writers must be stopped.

Definition at line 1000 of file VFS.cc.

References Tree< K, E >::begin(), Tree< K, E >::end(), Directory::fromFile(), Filesystem::getRoot(), File::isDirectory(), mount(), Vector< T >::pushBack(), and Directory::removeEphemeralFiles().

◆ removeMountCallback()

bool VFS::removeMountCallback ( MountCallback callback )

Removes a mount callback before its implementation unloads.

Definition at line 1194 of file VFS.cc.

References Spinlock::acquire(), ProcessorBase::executionContext(), ProcessorBase::information(), and Spinlock::release().

◆ removeProbeCallback()

bool VFS::removeProbeCallback ( Filesystem::ProbeCallback callback )

Removes a filesystem probe callback before its implementation unloads.

Definition at line 1093 of file VFS.cc.

References Spinlock::acquire(), ProcessorBase::executionContext(), ProcessorBase::information(), and Spinlock::release().

◆ rename()

bool VFS::rename	(	const String &	oldPath,
		File *	oldStart,
		const String &	newPath,
		File *	newStart,
		bool	noReplace = `false`
	)

Definition at line 1493 of file VFS.cc.

◆ resolveStartNode()

File * VFS::resolveStartNode	(	const String &	path,
		File *	pStartNode
	)

private

Definition at line 1778 of file VFS.cc.

◆ retainTrackedFile()

bool VFS::retainTrackedFile ( File * pFile )

Retain an already tracked File without publishing an untracked pointer.

Definition at line 1640 of file VFS.cc.

Referenced by Filesystem::findParent(), Directory::lookupChildAt(), Directory::removeEphemeralFiles(), and File::retainVfsReference().

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◆ retireOwnedFilesystem()

bool VFS::retireOwnedFilesystem ( Filesystem * filesystem )

Surrenders an attachment-owned registration. Existing admissions drain asynchronously; the last release deletes the backend outside VFS locks.

Definition at line 629 of file VFS.cc.

References OperationBarrier::close(), Tree< K, E >::lookup(), and Tree< K, E >::take().

◆ setRootFilesystem()

bool VFS::setRootFilesystem ( Filesystem * pFs )

Select the filesystem that supplies the root namespace.

Definition at line 716 of file VFS.cc.

References Filesystem::getVolumeLabel(), and Tree< K, E >::lookup().

◆ shutdownMountView()

bool VFS::shutdownMountView ( Vector< Filesystem * > & ownedBackings )

Terminal-only: detach a drained namespace and return attachment-owned backends.

Definition at line 40 of file VFS-mount-view.cc.

◆ snapshotDiskMounts()

bool VFS::snapshotDiskMounts ( Vector< MountIdentity > & mounts ) const

Definition at line 1927 of file VFS.cc.

◆ syncAll()

Filesystem::SyncStatus VFS::syncAll ( )

Pins all registered filesystems, attempts each, and returns the first error.

Definition at line 939 of file VFS.cc.

References Tree< K, E >::begin(), Tree< K, E >::count(), Dec, and Tree< K, E >::end().

◆ syncFilesystem()

Filesystem::SyncStatus VFS::syncFilesystem ( Filesystem * key )

Pins one registered backing filesystem before calling its sync operation.

Definition at line 918 of file VFS.cc.

References Tree< K, E >::lookup(), and SharedPointer< T >::tryAllocate().

◆ trackedFileBucket()

RcuPointer< VFS::TrackedFile > & VFS::trackedFileBucket ( File * file )

private

Definition at line 1598 of file VFS.cc.

◆ trackFile()

void VFS::trackFile ( File * pFile )

Track a File object that exists. It is necessary to keep track of File objects, or at least those that are stored in Directory caches and Filesystem objects, such that they can be correctly tidied up when no more usages exist.

It is almost never safe to directly delete a File pointer so this helps maintain that safety.

Definition at line 1625 of file VFS.cc.

Referenced by Directory::addCachedDirectoryEntry(), Directory::addDirectoryEntry(), Directory::addEphemeralFile(), UnixSocketSyscalls::bind(), SysFs::initialise(), DevFs::initialise(), and PtmxFile::open().

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◆ trackFileLocked()

bool VFS::trackFileLocked ( File * file )

private

Definition at line 1605 of file VFS.cc.

◆ tryTrackFile()

bool VFS::tryTrackFile ( File * pFile )

Fallible initial publication; success owns one additional tracked reference.

Definition at line 1632 of file VFS.cc.

◆ unloadAdmission()

Module::UnloadAdmission VFS::unloadAdmission ( bool terminal )

static

Definition at line 1895 of file VFS.cc.

◆ unregisterFilesystem()

bool VFS::unregisterFilesystem	(	Filesystem *	pFs,
		bool	canDelete = `true`,
		bool	terminal = `false`
	)

Remove a registered filesystem and optionally destroy it. When canDelete is true, the caller must provide exclusive ownership; success consumes the pointer, while false leaves it unconsumed. When canDelete is false, ownership always remains external. Live FilesystemPins reject unregistration without changing publication or closing admission.

Definition at line 580 of file VFS.cc.

References findRetained(), Directory::fromFile(), Filesystem::getVolumeLabel(), File::isDirectory(), Tree< K, E >::lookup(), Directory::setReparsePoint(), Filesystem::shutdown(), and Tree< K, E >::take().

Referenced by mount().

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◆ untrackFile()

bool VFS::untrackFile	(	File *	pFile,
		bool	destroy = `true`
	)

Stop tracking a File object, destroying by default if it is no longer tracked by any other owners.

Returns: true if the File object was deleted (or would have been, if destroy == false)

Definition at line 1670 of file VFS.cc.

Referenced by Filesystem::findParent(), File::releaseVfsReference(), Directory::removeEphemeralFiles(), and File::~File().

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Member Data Documentation

◆ m_CallbackLock

Spinlock VFS::m_CallbackLock

private

Definition at line 441 of file VFS.h.

◆ m_CallbacksClosing

bool VFS::m_CallbacksClosing

private

Definition at line 444 of file VFS.h.

◆ m_EmptyFile

File* VFS::m_EmptyFile

staticprivate

A static File object representing an invalid file

Definition at line 426 of file VFS.h.

◆ m_FindCache

LruCache<String, File*> VFS::m_FindCache

private

Definition at line 447 of file VFS.h.

◆ m_Instance

VFS VFS::m_Instance

staticprivate

The static instance object.

Todo:: Figure out a way to clean up files after deletion. Directory::remove() is not the right place to do this. There needs to be a way to add a File to some sort of queue that cleans it up once it hits refcount zero or something like that.

Definition at line 423 of file VFS.h.

Referenced by instance().

◆ m_MountCallbacks

List<MountCallbackItem*> VFS::m_MountCallbacks

private

Definition at line 438 of file VFS.h.

◆ m_MountMutationLock

Mutex VFS::m_MountMutationLock

mutableprivate

Definition at line 431 of file VFS.h.

◆ m_Mounts

MountTable VFS::m_Mounts

private

Definition at line 435 of file VFS.h.

◆ m_MountTableLock

Mutex VFS::m_MountTableLock

mutableprivate

Definition at line 432 of file VFS.h.

◆ m_MountView

VfsMountView* VFS::m_MountView

private

Definition at line 430 of file VFS.h.

◆ m_NextCallbackSequence

size_t VFS::m_NextCallbackSequence

private

Definition at line 442 of file VFS.h.

◆ m_pActiveCallbacks

ActiveInvocation* VFS::m_pActiveCallbacks

private

Definition at line 443 of file VFS.h.

◆ m_PathGeneration

uint64_t VFS::m_PathGeneration

private

Definition at line 429 of file VFS.h.

◆ m_PathMutationLock

Mutex VFS::m_PathMutationLock

mutableprivate

Definition at line 428 of file VFS.h.

◆ m_ProbeCallbacks

List<ProbeCallbackItem*> VFS::m_ProbeCallbacks

private

Definition at line 437 of file VFS.h.

◆ m_pRootFilesystem

Filesystem* VFS::m_pRootFilesystem

private

Definition at line 434 of file VFS.h.

◆ m_TrackedFiles

RcuPointer<TrackedFile> VFS::m_TrackedFiles[TrackedFileBuckets]

private

Definition at line 450 of file VFS.h.

◆ m_TrackedFilesLock

Mutex VFS::m_TrackedFilesLock

private

Definition at line 449 of file VFS.h.

◆ TrackedFileBuckets

constexpr size_t VFS::TrackedFileBuckets = 256

staticconstexprprivate

Definition at line 355 of file VFS.h.

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

Classes

Public Types

Public Member Functions

Static Public Member Functions

Private Types

Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Member Typedef Documentation

◆ MountCallback

◆ MountTable

Constructor & Destructor Documentation

◆ VFS()

◆ ~VFS()

Member Function Documentation

◆ acquireMount()

◆ acquireMountCallback()

◆ acquireProbeCallback()

◆ addMountCallback()

◆ addProbeCallback()

◆ attachFilesystem()

◆ attachRegisteredFilesystemsLocked()

◆ bootMountView()

◆ checkAccess() [1/3]

◆ checkAccess() [2/3]

◆ checkAccess() [3/3]

◆ createDirectory()

◆ createFile()

◆ createLink()

◆ createSymlink()

◆ diskMount()

◆ dispatchMountCallbacks()

◆ drainMountCallback()

◆ drainProbeCallback()

◆ find()

◆ findRetained()

◆ finishCallback()

◆ getFilesystemAt()

◆ getMountPath()

◆ getMounts()

◆ getMountsLocked()

◆ getRootFilesystem()

◆ getUniqueStableNameLocked()

◆ initialiseMountView()

◆ instance()

◆ isCallbackInvocation()

◆ mount()

◆ mountView()

◆ namespaceGeneration()

◆ pinFilesystem()

◆ registerFilesystem()

◆ registerFilesystemLocked()

◆ remove() [1/2]

◆ remove() [2/2]

◆ removeDiskFilesystem()

◆ removeEphemeralFiles()

◆ removeMountCallback()

◆ removeProbeCallback()

◆ rename()

◆ resolveStartNode()

◆ retainTrackedFile()

◆ retireOwnedFilesystem()

◆ setRootFilesystem()

◆ shutdownMountView()

◆ snapshotDiskMounts()

◆ syncAll()

◆ syncFilesystem()

◆ trackedFileBucket()

◆ trackFile()

◆ trackFileLocked()

◆ tryTrackFile()

◆ unloadAdmission()

◆ unregisterFilesystem()

◆ untrackFile()

Member Data Documentation

◆ m_CallbackLock

◆ m_CallbacksClosing

◆ m_EmptyFile

◆ m_FindCache