vfat.h File Reference

#include <ntifs.h>
#include <ntdddisk.h>
#include <dos.h>
#include <pseh/pseh2.h>
#include <section_attribs.h>
#include <pshpack1.h>
#include <poppack.h>

Include dependency graph for vfat.h:

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Go to the source code of this file.

Classes
struct	_BootSector
struct	_BootSector32
struct	_BootSectorFatX
struct	_FsInfoSector
struct	_FATDirEntry
struct	_EAFileHeader
struct	_EASetHeader
struct	_EAHeader
struct	_FATXDirEntry
struct	_slot
union	_DIR_ENTRY
struct	FATINFO
struct	_HASHENTRY
struct	_VFAT_DISPATCH
struct	_STATISTICS
struct	DEVICE_EXTENSION
struct	VFAT_GLOBAL_DATA
struct	_VFATFCB
struct	_VFATCCB
struct	__DOSTIME
struct	__DOSDATE
struct	VFAT_IRP_CONTEXT
struct	_VFAT_DIRENTRY_CONTEXT
struct	_VFAT_MOVE_CONTEXT
struct	_VFAT_CLOSE_CONTEXT

Macros
#define	USE_ROS_CC_AND_FS
#define	ENABLE_SWAPOUT
#define	VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
#define	ROUND_DOWN(n, align)    (((ULONG)n) & ~((align) - 1l))
#define	ROUND_UP(n, align)    ROUND_DOWN(((ULONG)n) + (align) - 1, (align))
#define	ROUND_DOWN_64(n, align)    (((ULONGLONG)n) & ~((align) - 1LL))
#define	ROUND_UP_64(n, align)    ROUND_DOWN_64(((ULONGLONG)n) + (align) - 1LL, (align))
#define	FAT_DIRTY_BIT   0x01
#define	FAT_EAFILE   "EA DATA. SF"
#define	VFAT_CASE_LOWER_BASE   8
#define	VFAT_CASE_LOWER_EXT   16
#define	LONGNAME_MAX_LENGTH   256
#define	ENTRY_DELETED(IsFatX, DirEntry)   (IsFatX ? FATX_ENTRY_DELETED(&((DirEntry)->FatX)) : FAT_ENTRY_DELETED(&((DirEntry)->Fat)))
#define	ENTRY_VOLUME(IsFatX, DirEntry)   (IsFatX ? FATX_ENTRY_VOLUME(&((DirEntry)->FatX)) : FAT_ENTRY_VOLUME(&((DirEntry)->Fat)))
#define	ENTRY_END(IsFatX, DirEntry)   (IsFatX ? FATX_ENTRY_END(&((DirEntry)->FatX)) : FAT_ENTRY_END(&((DirEntry)->Fat)))
#define	FAT_ENTRY_DELETED(DirEntry)   ((DirEntry)->Filename[0] == 0xe5)
#define	FAT_ENTRY_END(DirEntry)   ((DirEntry)->Filename[0] == 0)
#define	FAT_ENTRY_LONG(DirEntry)   (((DirEntry)->Attrib & 0x3f) == 0x0f)
#define	FAT_ENTRY_VOLUME(DirEntry)   (((DirEntry)->Attrib & 0x1f) == 0x08)
#define	FATX_ENTRY_DELETED(DirEntry)   ((DirEntry)->FilenameLength == 0xe5)
#define	FATX_ENTRY_END(DirEntry)   ((DirEntry)->FilenameLength == 0xff)
#define	FATX_ENTRY_LONG(DirEntry)   (FALSE)
#define	FATX_ENTRY_VOLUME(DirEntry)   (((DirEntry)->Attrib & 0x1f) == 0x08)
#define	FAT_ENTRIES_PER_PAGE   (PAGE_SIZE / sizeof (FAT_DIR_ENTRY))
#define	FATX_ENTRIES_PER_PAGE   (PAGE_SIZE / sizeof (FATX_DIR_ENTRY))
#define	BLOCKSIZE   512
#define	FAT16   (1)
#define	FAT12   (2)
#define	FAT32   (3)
#define	FATX16   (4)
#define	FATX32   (5)
#define	VCB_VOLUME_LOCKED   0x0001
#define	VCB_DISMOUNT_PENDING   0x0002
#define	VCB_IS_FATX   0x0004
#define	VCB_IS_SYS_OR_HAS_PAGE   0x0008
#define	VCB_IS_DIRTY   0x4000 /* Volume is dirty */
#define	VCB_CLEAR_DIRTY   0x8000 /* Clean dirty flag at shutdown */
#define	VCB_GOOD   0x0010 /* If not set, the VCB is improper for usage */
#define	STATISTICS_SIZE_NO_PAD   (sizeof(FILESYSTEM_STATISTICS) + sizeof(FAT_STATISTICS))
#define	VFAT_BREAK_ON_CORRUPTION   1
#define	FCB_CACHE_INITIALIZED   0x0001
#define	FCB_DELETE_PENDING   0x0002
#define	FCB_IS_FAT   0x0004
#define	FCB_IS_PAGE_FILE   0x0008
#define	FCB_IS_VOLUME   0x0010
#define	FCB_IS_DIRTY   0x0020
#define	FCB_DELAYED_CLOSE   0x0040
#define	NODE_TYPE_FCB   ((CSHORT)0x0502)
#define	CCB_DELETE_ON_CLOSE   0x0001
#define	TAG_CCB   'CtaF'
#define	TAG_FCB   'FtaF'
#define	TAG_IRP   'ItaF'
#define	TAG_CLOSE   'xtaF'
#define	TAG_STATS   'VtaF'
#define	TAG_BUFFER   'OtaF'
#define	TAG_VPB   'vtaF'
#define	TAG_NAME   'ntaF'
#define	TAG_SEARCH   'LtaF'
#define	TAG_DIRENT   'DtaF'
#define	ENTRIES_PER_SECTOR   (BLOCKSIZE / sizeof(FATDirEntry))
#define	IRPCONTEXT_CANWAIT   0x0001
#define	IRPCONTEXT_COMPLETE   0x0002
#define	IRPCONTEXT_QUEUE   0x0004
#define	IRPCONTEXT_PENDINGRETURNED   0x0008
#define	IRPCONTEXT_DEFERRED_WRITE   0x0010
#define	vfatAddToStat(Vcb, Stat, Inc)

Typedefs
typedef struct _BootSector	BootSector
typedef struct _EAFileHeader	FAT_EA_FILE_HEADER
typedef struct _EAFileHeader *	PFAT_EA_FILE_HEADER
typedef struct _EASetHeader	FAT_EA_SET_HEADER
typedef struct _EASetHeader *	PFAT_EA_SET_HEADER
typedef struct _EAHeader	FAT_EA_HEADER
typedef struct _EAHeader *	PFAT_EA_HEADER
typedef struct _FATDirEntry	FAT_DIR_ENTRY
typedef struct _FATDirEntry *	PFAT_DIR_ENTRY
typedef struct _slot	slot
typedef struct _FATXDirEntry	FATX_DIR_ENTRY
typedef struct _FATXDirEntry *	PFATX_DIR_ENTRY
typedef union _DIR_ENTRY	DIR_ENTRY
typedef union _DIR_ENTRY *	PDIR_ENTRY
typedef struct FATINFO *	PFATINFO
typedef struct _HASHENTRY	HASHENTRY
typedef struct DEVICE_EXTENSION *	PDEVICE_EXTENSION
typedef NTSTATUS(*	PGET_NEXT_CLUSTER) (PDEVICE_EXTENSION, ULONG, PULONG)
typedef NTSTATUS(*	PFIND_AND_MARK_AVAILABLE_CLUSTER) (PDEVICE_EXTENSION, PULONG)
typedef NTSTATUS(*	PWRITE_CLUSTER) (PDEVICE_EXTENSION, ULONG, ULONG, PULONG)
typedef BOOLEAN(*	PIS_DIRECTORY_EMPTY) (PDEVICE_EXTENSION, struct _VFATFCB *)
typedef NTSTATUS(*	PADD_ENTRY) (PDEVICE_EXTENSION, PUNICODE_STRING, struct _VFATFCB **, struct _VFATFCB *, ULONG, UCHAR, struct _VFAT_MOVE_CONTEXT *)
typedef NTSTATUS(*	PDEL_ENTRY) (PDEVICE_EXTENSION, struct _VFATFCB *, struct _VFAT_MOVE_CONTEXT *)
typedef NTSTATUS(*	PGET_NEXT_DIR_ENTRY) (PVOID *, PVOID *, struct _VFATFCB *, struct _VFAT_DIRENTRY_CONTEXT *, BOOLEAN)
typedef NTSTATUS(*	PGET_DIRTY_STATUS) (PDEVICE_EXTENSION, PBOOLEAN)
typedef NTSTATUS(*	PSET_DIRTY_STATUS) (PDEVICE_EXTENSION, BOOLEAN)
typedef struct _VFAT_DISPATCH	VFAT_DISPATCH
typedef struct _VFAT_DISPATCH *	PVFAT_DISPATCH
typedef struct _STATISTICS	STATISTICS
typedef struct _STATISTICS *	PSTATISTICS
typedef struct DEVICE_EXTENSION	DEVICE_EXTENSION
typedef struct DEVICE_EXTENSION	VCB
typedef struct DEVICE_EXTENSION *	PVCB
typedef struct VFAT_GLOBAL_DATA *	PVFAT_GLOBAL_DATA
typedef struct _VFATFCB	VFATFCB
typedef struct _VFATFCB *	PVFATFCB
typedef struct _VFATCCB	VFATCCB
typedef struct _VFATCCB *	PVFATCCB
typedef struct __DOSTIME	DOSTIME
typedef struct __DOSTIME *	PDOSTIME
typedef struct __DOSDATE	DOSDATE
typedef struct __DOSDATE *	PDOSDATE
typedef struct VFAT_IRP_CONTEXT *	PVFAT_IRP_CONTEXT
typedef struct _VFAT_DIRENTRY_CONTEXT	VFAT_DIRENTRY_CONTEXT
typedef struct _VFAT_DIRENTRY_CONTEXT *	PVFAT_DIRENTRY_CONTEXT
typedef struct _VFAT_MOVE_CONTEXT	VFAT_MOVE_CONTEXT
typedef struct _VFAT_MOVE_CONTEXT *	PVFAT_MOVE_CONTEXT
typedef struct _VFAT_CLOSE_CONTEXT	VFAT_CLOSE_CONTEXT
typedef struct _VFAT_CLOSE_CONTEXT *	PVFAT_CLOSE_CONTEXT

Functions
FORCEINLINE BOOLEAN	VfatIsDirectoryEmpty (PDEVICE_EXTENSION DeviceExt, struct _VFATFCB *Fcb)
FORCEINLINE NTSTATUS	VfatAddEntry (PDEVICE_EXTENSION DeviceExt, PUNICODE_STRING NameU, struct _VFATFCB **Fcb, struct _VFATFCB *ParentFcb, ULONG RequestedOptions, UCHAR ReqAttr, struct _VFAT_MOVE_CONTEXT *MoveContext)
FORCEINLINE NTSTATUS	VfatDelEntry (PDEVICE_EXTENSION DeviceExt, struct _VFATFCB *Fcb, struct _VFAT_MOVE_CONTEXT *MoveContext)
FORCEINLINE NTSTATUS	VfatGetNextDirEntry (PDEVICE_EXTENSION DeviceExt, PVOID *pContext, PVOID *pPage, struct _VFATFCB *pDirFcb, struct _VFAT_DIRENTRY_CONTEXT *DirContext, BOOLEAN First)
FORCEINLINE NTSTATUS	VfatMarkIrpContextForQueue (PVFAT_IRP_CONTEXT IrpContext)
FORCEINLINE BOOLEAN	vfatFCBIsDirectory (PVFATFCB FCB)
FORCEINLINE BOOLEAN	vfatFCBIsReadOnly (PVFATFCB FCB)
FORCEINLINE BOOLEAN	vfatVolumeIsFatX (PDEVICE_EXTENSION DeviceExt)
FORCEINLINE VOID	vfatReportChange (IN PDEVICE_EXTENSION DeviceExt, IN PVFATFCB Fcb, IN ULONG FilterMatch, IN ULONG Action)
NTSTATUS	VfatReadDisk (IN PDEVICE_OBJECT pDeviceObject, IN PLARGE_INTEGER ReadOffset, IN ULONG ReadLength, IN PUCHAR Buffer, IN BOOLEAN Override)
NTSTATUS	VfatReadDiskPartial (IN PVFAT_IRP_CONTEXT IrpContext, IN PLARGE_INTEGER ReadOffset, IN ULONG ReadLength, IN ULONG BufferOffset, IN BOOLEAN Wait)
NTSTATUS	VfatWriteDisk (IN PDEVICE_OBJECT pDeviceObject, IN PLARGE_INTEGER WriteOffset, IN ULONG WriteLength, IN OUT PUCHAR Buffer, IN BOOLEAN Override)
NTSTATUS	VfatWriteDiskPartial (IN PVFAT_IRP_CONTEXT IrpContext, IN PLARGE_INTEGER WriteOffset, IN ULONG WriteLength, IN ULONG BufferOffset, IN BOOLEAN Wait)
NTSTATUS	VfatBlockDeviceIoControl (IN PDEVICE_OBJECT DeviceObject, IN ULONG CtlCode, IN PVOID InputBuffer, IN ULONG InputBufferSize, IN OUT PVOID OutputBuffer, IN OUT PULONG pOutputBufferSize, IN BOOLEAN Override)
NTSTATUS	VfatCleanup (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatClose (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatCloseFile (PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject)
NTSTATUS	VfatCreate (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	FindFile (PDEVICE_EXTENSION DeviceExt, PVFATFCB Parent, PUNICODE_STRING FileToFindU, PVFAT_DIRENTRY_CONTEXT DirContext, BOOLEAN First)
VOID	vfat8Dot3ToString (PFAT_DIR_ENTRY pEntry, PUNICODE_STRING NameU)
NTSTATUS	VfatDirectoryControl (PVFAT_IRP_CONTEXT IrpContext)
BOOLEAN	FsdDosDateTimeToSystemTime (PDEVICE_EXTENSION DeviceExt, USHORT DosDate, USHORT DosTime, PLARGE_INTEGER SystemTime)
BOOLEAN	FsdSystemTimeToDosDateTime (PDEVICE_EXTENSION DeviceExt, PLARGE_INTEGER SystemTime, USHORT *pDosDate, USHORT *pDosTime)
ULONG	vfatDirEntryGetFirstCluster (PDEVICE_EXTENSION pDeviceExt, PDIR_ENTRY pDirEntry)
NTSTATUS	vfatFCBInitializeCacheFromVolume (PVCB vcb, PVFATFCB fcb)
NTSTATUS	VfatUpdateEntry (IN PDEVICE_EXTENSION DeviceExt, PVFATFCB pFcb)
BOOLEAN	vfatFindDirSpace (PDEVICE_EXTENSION DeviceExt, PVFATFCB pDirFcb, ULONG nbSlots, PULONG start)
NTSTATUS	vfatRenameEntry (IN PDEVICE_EXTENSION DeviceExt, IN PVFATFCB pFcb, IN PUNICODE_STRING FileName, IN BOOLEAN CaseChangeOnly)
NTSTATUS	VfatMoveEntry (IN PDEVICE_EXTENSION DeviceExt, IN PVFATFCB pFcb, IN PUNICODE_STRING FileName, IN PVFATFCB ParentFcb)
NTSTATUS	VfatSetExtendedAttributes (PFILE_OBJECT FileObject, PVOID Ea, ULONG EaLength)
VOID	VfatInitFastIoRoutines (PFAST_IO_DISPATCH FastIoDispatch)
BOOLEAN NTAPI	VfatAcquireForLazyWrite (IN PVOID Context, IN BOOLEAN Wait)
VOID NTAPI	VfatReleaseFromLazyWrite (IN PVOID Context)
NTSTATUS	FAT12GetNextCluster (PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster, PULONG NextCluster)
NTSTATUS	FAT12FindAndMarkAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
NTSTATUS	FAT12WriteCluster (PDEVICE_EXTENSION DeviceExt, ULONG ClusterToWrite, ULONG NewValue, PULONG OldValue)
NTSTATUS	FAT16GetNextCluster (PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster, PULONG NextCluster)
NTSTATUS	FAT16FindAndMarkAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
NTSTATUS	FAT16WriteCluster (PDEVICE_EXTENSION DeviceExt, ULONG ClusterToWrite, ULONG NewValue, PULONG OldValue)
NTSTATUS	FAT32GetNextCluster (PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster, PULONG NextCluster)
NTSTATUS	FAT32FindAndMarkAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
NTSTATUS	FAT32WriteCluster (PDEVICE_EXTENSION DeviceExt, ULONG ClusterToWrite, ULONG NewValue, PULONG OldValue)
NTSTATUS	OffsetToCluster (PDEVICE_EXTENSION DeviceExt, ULONG FirstCluster, ULONG FileOffset, PULONG Cluster, BOOLEAN Extend)
ULONGLONG	ClusterToSector (PDEVICE_EXTENSION DeviceExt, ULONG Cluster)
NTSTATUS	GetNextCluster (PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster, PULONG NextCluster)
NTSTATUS	GetNextClusterExtend (PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster, PULONG NextCluster)
NTSTATUS	CountAvailableClusters (PDEVICE_EXTENSION DeviceExt, PLARGE_INTEGER Clusters)
NTSTATUS	WriteCluster (PDEVICE_EXTENSION DeviceExt, ULONG ClusterToWrite, ULONG NewValue)
NTSTATUS	GetDirtyStatus (PDEVICE_EXTENSION DeviceExt, PBOOLEAN DirtyStatus)
NTSTATUS	FAT16GetDirtyStatus (PDEVICE_EXTENSION DeviceExt, PBOOLEAN DirtyStatus)
NTSTATUS	FAT32GetDirtyStatus (PDEVICE_EXTENSION DeviceExt, PBOOLEAN DirtyStatus)
NTSTATUS	SetDirtyStatus (PDEVICE_EXTENSION DeviceExt, BOOLEAN DirtyStatus)
NTSTATUS	FAT16SetDirtyStatus (PDEVICE_EXTENSION DeviceExt, BOOLEAN DirtyStatus)
NTSTATUS	FAT32SetDirtyStatus (PDEVICE_EXTENSION DeviceExt, BOOLEAN DirtyStatus)
NTSTATUS	FAT32UpdateFreeClustersCount (PDEVICE_EXTENSION DeviceExt)
PVFATFCB	vfatNewFCB (PDEVICE_EXTENSION pVCB, PUNICODE_STRING pFileNameU)
NTSTATUS	vfatSetFCBNewDirName (PDEVICE_EXTENSION pVCB, PVFATFCB Fcb, PVFATFCB ParentFcb)
NTSTATUS	vfatUpdateFCB (PDEVICE_EXTENSION pVCB, PVFATFCB Fcb, PVFAT_DIRENTRY_CONTEXT DirContext, PVFATFCB ParentFcb)
VOID	vfatDestroyFCB (PVFATFCB pFCB)
VOID	vfatDestroyCCB (PVFATCCB pCcb)
VOID	vfatGrabFCB (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB)
VOID	vfatReleaseFCB (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB)
PVFATFCB	vfatGrabFCBFromTable (PDEVICE_EXTENSION pDeviceExt, PUNICODE_STRING pFileNameU)
PVFATFCB	vfatMakeRootFCB (PDEVICE_EXTENSION pVCB)
PVFATFCB	vfatOpenRootFCB (PDEVICE_EXTENSION pVCB)
BOOLEAN	vfatFCBIsRoot (PVFATFCB FCB)
NTSTATUS	vfatAttachFCBToFileObject (PDEVICE_EXTENSION vcb, PVFATFCB fcb, PFILE_OBJECT fileObject)
NTSTATUS	vfatDirFindFile (PDEVICE_EXTENSION pVCB, PVFATFCB parentFCB, PUNICODE_STRING FileToFindU, PVFATFCB *fileFCB)
NTSTATUS	vfatGetFCBForFile (PDEVICE_EXTENSION pVCB, PVFATFCB *pParentFCB, PVFATFCB *pFCB, PUNICODE_STRING pFileNameU)
NTSTATUS	vfatMakeFCBFromDirEntry (PVCB vcb, PVFATFCB directoryFCB, PVFAT_DIRENTRY_CONTEXT DirContext, PVFATFCB *fileFCB)
NTSTATUS	VfatGetStandardInformation (PVFATFCB FCB, PFILE_STANDARD_INFORMATION StandardInfo, PULONG BufferLength)
NTSTATUS	VfatGetBasicInformation (PFILE_OBJECT FileObject, PVFATFCB FCB, PDEVICE_EXTENSION DeviceExt, PFILE_BASIC_INFORMATION BasicInfo, PULONG BufferLength)
NTSTATUS	VfatQueryInformation (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatSetInformation (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatSetAllocationSizeInformation (PFILE_OBJECT FileObject, PVFATFCB Fcb, PDEVICE_EXTENSION DeviceExt, PLARGE_INTEGER AllocationSize)
NTSTATUS	VfatFlush (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatFlushVolume (PDEVICE_EXTENSION DeviceExt, PVFATFCB VolumeFcb)
NTSTATUS	VfatFileSystemControl (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS NTAPI	DriverEntry (PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
NTSTATUS NTAPI	VfatBuildRequest (PDEVICE_OBJECT DeviceObject, PIRP Irp)
PVOID	VfatGetUserBuffer (IN PIRP Irp, IN BOOLEAN Paging)
NTSTATUS	VfatLockUserBuffer (IN PIRP Irp, IN ULONG Length, IN LOCK_OPERATION Operation)
BOOLEAN	VfatCheckForDismount (IN PDEVICE_EXTENSION DeviceExt, IN BOOLEAN Create)
VOID NTAPI	VfatHandleDeferredWrite (IN PVOID IrpContext, IN PVOID Unused)
NTSTATUS	VfatPnp (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatRead (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatWrite (PVFAT_IRP_CONTEXT *pIrpContext)
NTSTATUS	NextCluster (PDEVICE_EXTENSION DeviceExt, ULONG FirstCluster, PULONG CurrentCluster, BOOLEAN Extend)
NTSTATUS NTAPI	VfatShutdown (PDEVICE_OBJECT DeviceObject, PIRP Irp)
VOID	vfatSplitPathName (PUNICODE_STRING PathNameU, PUNICODE_STRING DirNameU, PUNICODE_STRING FileNameU)
BOOLEAN	vfatIsLongIllegal (WCHAR c)
BOOLEAN	IsDotOrDotDot (PCUNICODE_STRING Name)
NTSTATUS	VfatQueryVolumeInformation (PVFAT_IRP_CONTEXT IrpContext)
NTSTATUS	VfatSetVolumeInformation (PVFAT_IRP_CONTEXT IrpContext)

Variables
PVFAT_GLOBAL_DATA	VfatGlobalData
DRIVER_DISPATCH	VfatBuildRequest
DRIVER_DISPATCH	VfatShutdown

Macro Definition Documentation

BLOCKSIZE

#define BLOCKSIZE   512

Definition at line 232 of file vfat.h.

CCB_DELETE_ON_CLOSE

#define CCB_DELETE_ON_CLOSE   0x0001

Definition at line 534 of file vfat.h.

ENABLE_SWAPOUT

#define ENABLE_SWAPOUT

Definition at line 16 of file vfat.h.

ENTRIES_PER_SECTOR

#define ENTRIES_PER_SECTOR   (BLOCKSIZE / sizeof(FATDirEntry))

Definition at line 557 of file vfat.h.

ENTRY_DELETED

#define ENTRY_DELETED	(		IsFatX,
			DirEntry
	)		(IsFatX ? FATX_ENTRY_DELETED(&((DirEntry)->FatX)) : FAT_ENTRY_DELETED(&((DirEntry)->Fat)))

Definition at line 205 of file vfat.h.

ENTRY_END

#define ENTRY_END	(		IsFatX,
			DirEntry
	)		(IsFatX ? FATX_ENTRY_END(&((DirEntry)->FatX)) : FAT_ENTRY_END(&((DirEntry)->Fat)))

Definition at line 207 of file vfat.h.

ENTRY_VOLUME

#define ENTRY_VOLUME	(		IsFatX,
			DirEntry
	)		(IsFatX ? FATX_ENTRY_VOLUME(&((DirEntry)->FatX)) : FAT_ENTRY_VOLUME(&((DirEntry)->Fat)))

Definition at line 206 of file vfat.h.

FAT12

#define FAT12   (2)

Definition at line 235 of file vfat.h.

FAT16

#define FAT16   (1)

Definition at line 234 of file vfat.h.

FAT32

#define FAT32   (3)

Definition at line 236 of file vfat.h.

FAT_DIRTY_BIT

#define FAT_DIRTY_BIT   0x01

Definition at line 85 of file vfat.h.

FAT_EAFILE

#define FAT_EAFILE   "EA DATA. SF"

Definition at line 132 of file vfat.h.

FAT_ENTRIES_PER_PAGE

#define FAT_ENTRIES_PER_PAGE   (PAGE_SIZE / sizeof (FAT_DIR_ENTRY))

Definition at line 219 of file vfat.h.

FAT_ENTRY_DELETED

#define FAT_ENTRY_DELETED

(

DirEntry

)

((DirEntry)->Filename[0] == 0xe5)

Definition at line 209 of file vfat.h.

FAT_ENTRY_END

#define FAT_ENTRY_END

(

DirEntry

)

((DirEntry)->Filename[0] == 0)

Definition at line 210 of file vfat.h.

FAT_ENTRY_LONG

#define FAT_ENTRY_LONG

(

DirEntry

)

(((DirEntry)->Attrib & 0x3f) == 0x0f)

Definition at line 211 of file vfat.h.

FAT_ENTRY_VOLUME

#define FAT_ENTRY_VOLUME

(

DirEntry

)

(((DirEntry)->Attrib & 0x1f) == 0x08)

Definition at line 212 of file vfat.h.

FATX16

#define FATX16   (4)

Definition at line 237 of file vfat.h.

FATX32

#define FATX32   (5)

Definition at line 238 of file vfat.h.

FATX_ENTRIES_PER_PAGE

#define FATX_ENTRIES_PER_PAGE   (PAGE_SIZE / sizeof (FATX_DIR_ENTRY))

Definition at line 220 of file vfat.h.

FATX_ENTRY_DELETED

#define FATX_ENTRY_DELETED

(

DirEntry

)

((DirEntry)->FilenameLength == 0xe5)

Definition at line 214 of file vfat.h.

FATX_ENTRY_END

#define FATX_ENTRY_END

(

DirEntry

)

((DirEntry)->FilenameLength == 0xff)

Definition at line 215 of file vfat.h.

FATX_ENTRY_LONG

#define FATX_ENTRY_LONG

(

DirEntry

)

(FALSE)

Definition at line 216 of file vfat.h.

FATX_ENTRY_VOLUME

#define FATX_ENTRY_VOLUME

(

DirEntry

)

(((DirEntry)->Attrib & 0x1f) == 0x08)

Definition at line 217 of file vfat.h.

FCB_CACHE_INITIALIZED

#define FCB_CACHE_INITIALIZED   0x0001

Definition at line 433 of file vfat.h.

FCB_DELAYED_CLOSE

#define FCB_DELAYED_CLOSE   0x0040

Definition at line 439 of file vfat.h.

FCB_DELETE_PENDING

#define FCB_DELETE_PENDING   0x0002

Definition at line 434 of file vfat.h.

FCB_IS_DIRTY

#define FCB_IS_DIRTY   0x0020

Definition at line 438 of file vfat.h.

FCB_IS_FAT

#define FCB_IS_FAT   0x0004

Definition at line 435 of file vfat.h.

FCB_IS_PAGE_FILE

#define FCB_IS_PAGE_FILE   0x0008

Definition at line 436 of file vfat.h.

FCB_IS_VOLUME

#define FCB_IS_VOLUME   0x0010

Definition at line 437 of file vfat.h.

IRPCONTEXT_CANWAIT

#define IRPCONTEXT_CANWAIT   0x0001

Definition at line 575 of file vfat.h.

IRPCONTEXT_COMPLETE

#define IRPCONTEXT_COMPLETE   0x0002

Definition at line 576 of file vfat.h.

IRPCONTEXT_DEFERRED_WRITE

#define IRPCONTEXT_DEFERRED_WRITE   0x0010

Definition at line 579 of file vfat.h.

IRPCONTEXT_PENDINGRETURNED

#define IRPCONTEXT_PENDINGRETURNED   0x0008

Definition at line 578 of file vfat.h.

IRPCONTEXT_QUEUE

#define IRPCONTEXT_QUEUE   0x0004

Definition at line 577 of file vfat.h.

LONGNAME_MAX_LENGTH

#define LONGNAME_MAX_LENGTH   256

Definition at line 203 of file vfat.h.

NODE_TYPE_FCB

#define NODE_TYPE_FCB   ((CSHORT)0x0502)

Definition at line 445 of file vfat.h.

ROUND_DOWN

#define ROUND_DOWN	(		n,
			align
	)		(((ULONG)n) & ~((align) - 1l))

Definition at line 25 of file vfat.h.

ROUND_DOWN_64

#define ROUND_DOWN_64	(		n,
			align
	)		(((ULONGLONG)n) & ~((align) - 1LL))

Definition at line 31 of file vfat.h.

ROUND_UP

#define ROUND_UP	(		n,
			align
	)		ROUND_DOWN(((ULONG)n) + (align) - 1, (align))

Definition at line 28 of file vfat.h.

ROUND_UP_64

#define ROUND_UP_64	(		n,
			align
	)		ROUND_DOWN_64(((ULONGLONG)n) + (align) - 1LL, (align))

Definition at line 34 of file vfat.h.

STATISTICS_SIZE_NO_PAD

#define STATISTICS_SIZE_NO_PAD   (sizeof(FILESYSTEM_STATISTICS) + sizeof(FAT_STATISTICS))

Definition at line 304 of file vfat.h.

TAG_BUFFER

#define TAG_BUFFER   'OtaF'

Definition at line 551 of file vfat.h.

TAG_CCB

#define TAG_CCB   'CtaF'

Definition at line 546 of file vfat.h.

TAG_CLOSE

#define TAG_CLOSE   'xtaF'

Definition at line 549 of file vfat.h.

TAG_DIRENT

#define TAG_DIRENT   'DtaF'

Definition at line 555 of file vfat.h.

TAG_FCB

#define TAG_FCB   'FtaF'

Definition at line 547 of file vfat.h.

TAG_IRP

#define TAG_IRP   'ItaF'

Definition at line 548 of file vfat.h.

TAG_NAME

#define TAG_NAME   'ntaF'

Definition at line 553 of file vfat.h.

TAG_SEARCH

#define TAG_SEARCH   'LtaF'

Definition at line 554 of file vfat.h.

TAG_STATS

#define TAG_STATS   'VtaF'

Definition at line 550 of file vfat.h.

TAG_VPB

#define TAG_VPB   'vtaF'

Definition at line 552 of file vfat.h.

USE_ROS_CC_AND_FS

#define USE_ROS_CC_AND_FS

Definition at line 15 of file vfat.h.

VCB_CLEAR_DIRTY

#define VCB_CLEAR_DIRTY   0x8000 /* Clean dirty flag at shutdown */

Definition at line 245 of file vfat.h.

VCB_DISMOUNT_PENDING

#define VCB_DISMOUNT_PENDING   0x0002

Definition at line 241 of file vfat.h.

VCB_GOOD

#define VCB_GOOD   0x0010 /* If not set, the VCB is improper for usage */

Definition at line 247 of file vfat.h.

VCB_IS_DIRTY

#define VCB_IS_DIRTY   0x4000 /* Volume is dirty */

Definition at line 244 of file vfat.h.

VCB_IS_FATX

#define VCB_IS_FATX   0x0004

Definition at line 242 of file vfat.h.

VCB_IS_SYS_OR_HAS_PAGE

#define VCB_IS_SYS_OR_HAS_PAGE   0x0008

Definition at line 243 of file vfat.h.

VCB_VOLUME_LOCKED

#define VCB_VOLUME_LOCKED   0x0001

Definition at line 240 of file vfat.h.

VFAT_BREAK_ON_CORRUPTION

#define VFAT_BREAK_ON_CORRUPTION   1

Definition at line 407 of file vfat.h.

VFAT_CASE_LOWER_BASE

#define VFAT_CASE_LOWER_BASE   8

Definition at line 200 of file vfat.h.

VFAT_CASE_LOWER_EXT

#define VFAT_CASE_LOWER_EXT   16

Definition at line 201 of file vfat.h.

vfatAddToStat

#define vfatAddToStat	(		Vcb,
			Stat,
			Inc
	)

Value:

{                                                                                                             \
    PSTATISTICS Stats = &(Vcb)->Statistics[KeGetCurrentProcessorNumber() % VfatGlobalData->NumberProcessors]; \
    Stats->Stat += Inc;                                                                                       \
}

Definition at line 671 of file vfat.h.

VOLUME_IS_NOT_CACHED_WORK_AROUND_IT

#define VOLUME_IS_NOT_CACHED_WORK_AROUND_IT

Definition at line 22 of file vfat.h.

Typedef Documentation

BootSector

typedef struct _BootSector BootSector

Definition at line 108 of file vfat.h.

DEVICE_EXTENSION

typedef struct DEVICE_EXTENSION DEVICE_EXTENSION

DIR_ENTRY

typedef union _DIR_ENTRY DIR_ENTRY

Definition at line 230 of file vfat.h.

DOSDATE

typedef struct __DOSDATE DOSDATE

DOSTIME

typedef struct __DOSTIME DOSTIME

FAT_DIR_ENTRY

typedef struct _FATDirEntry FAT_DIR_ENTRY

Definition at line 167 of file vfat.h.

FAT_EA_FILE_HEADER

typedef struct _EAFileHeader FAT_EA_FILE_HEADER

Definition at line 134 of file vfat.h.

FAT_EA_HEADER

typedef struct _EAHeader FAT_EA_HEADER

Definition at line 156 of file vfat.h.

FAT_EA_SET_HEADER

typedef struct _EASetHeader FAT_EA_SET_HEADER

Definition at line 143 of file vfat.h.

FATX_DIR_ENTRY

typedef struct _FATXDirEntry FATX_DIR_ENTRY

Definition at line 222 of file vfat.h.

HASHENTRY

typedef struct _HASHENTRY HASHENTRY

PADD_ENTRY

typedef NTSTATUS(* PADD_ENTRY) (PDEVICE_EXTENSION, PUNICODE_STRING, struct _VFATFCB **, struct _VFATFCB *, ULONG, UCHAR, struct _VFAT_MOVE_CONTEXT *)

Definition at line 290 of file vfat.h.

PDEL_ENTRY

typedef NTSTATUS(* PDEL_ENTRY) (PDEVICE_EXTENSION, struct _VFATFCB *, struct _VFAT_MOVE_CONTEXT *)

Definition at line 291 of file vfat.h.

PDEVICE_EXTENSION

typedef struct DEVICE_EXTENSION* PDEVICE_EXTENSION

Definition at line 283 of file vfat.h.

PDIR_ENTRY

typedef union _DIR_ENTRY * PDIR_ENTRY

Definition at line 230 of file vfat.h.

PDOSDATE

typedef struct __DOSDATE * PDOSDATE

PDOSTIME

typedef struct __DOSTIME * PDOSTIME

PFAT_DIR_ENTRY

typedef struct _FATDirEntry * PFAT_DIR_ENTRY

Definition at line 167 of file vfat.h.

PFAT_EA_FILE_HEADER

typedef struct _EAFileHeader * PFAT_EA_FILE_HEADER

Definition at line 134 of file vfat.h.

PFAT_EA_HEADER

typedef struct _EAHeader * PFAT_EA_HEADER

Definition at line 156 of file vfat.h.

PFAT_EA_SET_HEADER

typedef struct _EASetHeader * PFAT_EA_SET_HEADER

Definition at line 143 of file vfat.h.

PFATINFO

typedef struct FATINFO * PFATINFO

PFATX_DIR_ENTRY

typedef struct _FATXDirEntry * PFATX_DIR_ENTRY

Definition at line 222 of file vfat.h.

PFIND_AND_MARK_AVAILABLE_CLUSTER

typedef NTSTATUS(* PFIND_AND_MARK_AVAILABLE_CLUSTER) (PDEVICE_EXTENSION, PULONG)

Definition at line 286 of file vfat.h.

PGET_DIRTY_STATUS

typedef NTSTATUS(* PGET_DIRTY_STATUS) (PDEVICE_EXTENSION, PBOOLEAN)

Definition at line 293 of file vfat.h.

PGET_NEXT_CLUSTER

typedef NTSTATUS(* PGET_NEXT_CLUSTER) (PDEVICE_EXTENSION, ULONG, PULONG)

Definition at line 285 of file vfat.h.

PGET_NEXT_DIR_ENTRY

typedef NTSTATUS(* PGET_NEXT_DIR_ENTRY) (PVOID *, PVOID *, struct _VFATFCB *, struct _VFAT_DIRENTRY_CONTEXT *, BOOLEAN)

Definition at line 292 of file vfat.h.

PIS_DIRECTORY_EMPTY

typedef BOOLEAN(* PIS_DIRECTORY_EMPTY) (PDEVICE_EXTENSION, struct _VFATFCB *)

Definition at line 289 of file vfat.h.

PSET_DIRTY_STATUS

typedef NTSTATUS(* PSET_DIRTY_STATUS) (PDEVICE_EXTENSION, BOOLEAN)

Definition at line 294 of file vfat.h.

PSTATISTICS

typedef struct _STATISTICS * PSTATISTICS

PVCB

typedef struct DEVICE_EXTENSION * PVCB

PVFAT_CLOSE_CONTEXT

typedef struct _VFAT_CLOSE_CONTEXT * PVFAT_CLOSE_CONTEXT

PVFAT_DIRENTRY_CONTEXT

typedef struct _VFAT_DIRENTRY_CONTEXT * PVFAT_DIRENTRY_CONTEXT

PVFAT_DISPATCH

typedef struct _VFAT_DISPATCH * PVFAT_DISPATCH

PVFAT_GLOBAL_DATA

typedef struct VFAT_GLOBAL_DATA * PVFAT_GLOBAL_DATA

PVFAT_IRP_CONTEXT

typedef struct VFAT_IRP_CONTEXT * PVFAT_IRP_CONTEXT

PVFAT_MOVE_CONTEXT

typedef struct _VFAT_MOVE_CONTEXT * PVFAT_MOVE_CONTEXT

PVFATCCB

typedef struct _VFATCCB * PVFATCCB

PVFATFCB

typedef struct _VFATFCB * PVFATFCB

PWRITE_CLUSTER

typedef NTSTATUS(* PWRITE_CLUSTER) (PDEVICE_EXTENSION, ULONG, ULONG, PULONG)

Definition at line 287 of file vfat.h.

slot

typedef struct _slot slot

Definition at line 196 of file vfat.h.

STATISTICS

typedef struct _STATISTICS STATISTICS

VCB

typedef struct DEVICE_EXTENSION VCB

VFAT_CLOSE_CONTEXT

typedef struct _VFAT_CLOSE_CONTEXT VFAT_CLOSE_CONTEXT

VFAT_DIRENTRY_CONTEXT

typedef struct _VFAT_DIRENTRY_CONTEXT VFAT_DIRENTRY_CONTEXT

VFAT_DISPATCH

typedef struct _VFAT_DISPATCH VFAT_DISPATCH

VFAT_MOVE_CONTEXT

typedef struct _VFAT_MOVE_CONTEXT VFAT_MOVE_CONTEXT

VFATCCB

typedef struct _VFATCCB VFATCCB

VFATFCB

typedef struct _VFATFCB VFATFCB

Function Documentation

ClusterToSector()

ULONGLONG ClusterToSector	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	Cluster
	)

Definition at line 731 of file fat.c.

{
    return DeviceExt->FatInfo.dataStart +
           ((ULONGLONG)(Cluster - 2) * DeviceExt->FatInfo.SectorsPerCluster);
 
}

Referenced by VfatReadFileData(), and VfatWriteFileData().

CountAvailableClusters()

NTSTATUS CountAvailableClusters	(	PDEVICE_EXTENSION	DeviceExt,
		PLARGE_INTEGER	Clusters
	)

Definition at line 541 of file fat.c.

{
    NTSTATUS Status = STATUS_SUCCESS;
    ExAcquireResourceExclusiveLite (&DeviceExt->FatResource, TRUE);
    if (!DeviceExt->AvailableClustersValid)
    {
        if (DeviceExt->FatInfo.FatType == FAT12)
            Status = FAT12CountAvailableClusters(DeviceExt);
        else if (DeviceExt->FatInfo.FatType == FAT16 || DeviceExt->FatInfo.FatType == FATX16)
            Status = FAT16CountAvailableClusters(DeviceExt);
        else
            Status = FAT32CountAvailableClusters(DeviceExt);
    }
    if (Clusters != NULL)
    {
        Clusters->QuadPart = DeviceExt->AvailableClusters;
    }
    ExReleaseResourceLite (&DeviceExt->FatResource);
 
    return Status;
}

Referenced by FsdGetFsFullSizeInformation(), FsdGetFsSizeInformation(), and VfatMount().

DriverEntry()

NTSTATUS NTAPI DriverEntry	(	PDRIVER_OBJECT	DriverObject,
		PUNICODE_STRING	RegistryPath
	)

Definition at line 16 of file battc.c.

{
    DPRINT("Battery class driver initialized\n");
 
    return STATUS_SUCCESS;
}

FAT12FindAndMarkAvailableCluster()

NTSTATUS FAT12FindAndMarkAvailableCluster	(	PDEVICE_EXTENSION	DeviceExt,
		PULONG	Cluster
	)

Definition at line 244 of file fat.c.

{
    ULONG FatLength;
    ULONG StartCluster;
    ULONG Entry;
    PUSHORT CBlock;
    ULONG i, j;
    PVOID BaseAddress;
    PVOID Context;
    LARGE_INTEGER Offset;
 
    FatLength = DeviceExt->FatInfo.NumberOfClusters + 2;
    *Cluster = 0;
    StartCluster = DeviceExt->LastAvailableCluster;
    Offset.QuadPart = 0;
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, PIN_WAIT, &Context, &BaseAddress);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        DPRINT1("CcPinRead(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector);
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    for (j = 0; j < 2; j++)
    {
        for (i = StartCluster; i < FatLength; i++)
        {
            CBlock = (PUSHORT)((char*)BaseAddress + (i * 12) / 8);
            if ((i % 2) == 0)
            {
                Entry = *CBlock & 0xfff;
            }
            else
            {
                Entry = *CBlock >> 4;
            }
 
            if (Entry == 0)
            {
                DPRINT("Found available cluster 0x%x\n", i);
                DeviceExt->LastAvailableCluster = *Cluster = i;
                if ((i % 2) == 0)
                    *CBlock = (*CBlock & 0xf000) | 0xfff;
                else
                    *CBlock = (*CBlock & 0xf) | 0xfff0;
                CcSetDirtyPinnedData(Context, NULL);
                CcUnpinData(Context);
                if (DeviceExt->AvailableClustersValid)
                    InterlockedDecrement((PLONG)&DeviceExt->AvailableClusters);
                return STATUS_SUCCESS;
            }
        }
        FatLength = StartCluster;
        StartCluster = 2;
    }
    CcUnpinData(Context);
    return STATUS_DISK_FULL;
}

Referenced by VfatMount().

FAT12GetNextCluster()

NTSTATUS FAT12GetNextCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	CurrentCluster,
		PULONG	NextCluster
	)

Definition at line 123 of file fat.c.

{
    PUSHORT CBlock;
    ULONG Entry;
    PVOID BaseAddress;
    PVOID Context;
    LARGE_INTEGER Offset;
 
    *NextCluster = 0;
 
    Offset.QuadPart = 0;
    _SEH2_TRY
    {
        CcMapData(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, MAP_WAIT, &Context, &BaseAddress);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    CBlock = (PUSHORT)((char*)BaseAddress + (CurrentCluster * 12) / 8);
    if ((CurrentCluster % 2) == 0)
    {
         Entry = *CBlock & 0x0fff;
    }
    else
    {
        Entry = *CBlock >> 4;
    }
 
//    DPRINT("Entry %x\n",Entry);
    if (Entry >= 0xff8 && Entry <= 0xfff)
        Entry = 0xffffffff;
 
//    DPRINT("Returning %x\n",Entry);
    ASSERT(Entry != 0);
    *NextCluster = Entry;
    CcUnpinData(Context);
//    return Entry == 0xffffffff ? STATUS_END_OF_FILE : STATUS_SUCCESS;
    return STATUS_SUCCESS;
}

Referenced by VfatMount().

FAT12WriteCluster()

NTSTATUS FAT12WriteCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	ClusterToWrite,
		ULONG	NewValue,
		PULONG	OldValue
	)

Definition at line 570 of file fat.c.

{
    ULONG FATOffset;
    PUCHAR CBlock;
    PVOID BaseAddress;
    PVOID Context;
    LARGE_INTEGER Offset;
 
    Offset.QuadPart = 0;
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, PIN_WAIT, &Context, &BaseAddress);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
    CBlock = (PUCHAR)BaseAddress;
 
    FATOffset = (ClusterToWrite * 12) / 8;
    DPRINT("Writing 0x%x for 0x%x at 0x%x\n",
           NewValue, ClusterToWrite, FATOffset);
    if ((ClusterToWrite % 2) == 0)
    {
        *OldValue = CBlock[FATOffset] + ((CBlock[FATOffset + 1] & 0x0f) << 8);
        CBlock[FATOffset] = (UCHAR)NewValue;
        CBlock[FATOffset + 1] &= 0xf0;
        CBlock[FATOffset + 1] |= (NewValue & 0xf00) >> 8;
    }
    else
    {
        *OldValue = (CBlock[FATOffset] >> 4) + (CBlock[FATOffset + 1] << 4);
        CBlock[FATOffset] &= 0x0f;
        CBlock[FATOffset] |= (NewValue & 0xf) << 4;
        CBlock[FATOffset + 1] = (UCHAR)(NewValue >> 4);
    }
    /* Write the changed FAT sector(s) to disk */
    CcSetDirtyPinnedData(Context, NULL);
    CcUnpinData(Context);
    return STATUS_SUCCESS;
}

Referenced by VfatMount().

FAT16FindAndMarkAvailableCluster()

NTSTATUS FAT16FindAndMarkAvailableCluster	(	PDEVICE_EXTENSION	DeviceExt,
		PULONG	Cluster
	)

Definition at line 173 of file fat.c.

{
    ULONG FatLength;
    ULONG StartCluster;
    ULONG i, j;
    PVOID BaseAddress;
    ULONG ChunkSize;
    PVOID Context = 0;
    LARGE_INTEGER Offset;
    PUSHORT Block;
    PUSHORT BlockEnd;
 
    ChunkSize = CACHEPAGESIZE(DeviceExt);
    FatLength = (DeviceExt->FatInfo.NumberOfClusters + 2);
    *Cluster = 0;
    StartCluster = DeviceExt->LastAvailableCluster;
 
    for (j = 0; j < 2; j++)
    {
        for (i = StartCluster; i < FatLength;)
        {
            Offset.QuadPart = ROUND_DOWN(i * 2, ChunkSize);
            _SEH2_TRY
            {
                CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
            }
            _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
            {
                DPRINT1("CcPinRead(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, ChunkSize);
                _SEH2_YIELD(return _SEH2_GetExceptionCode());
            }
            _SEH2_END;
 
            Block = (PUSHORT)((ULONG_PTR)BaseAddress + (i * 2) % ChunkSize);
            BlockEnd = (PUSHORT)((ULONG_PTR)BaseAddress + ChunkSize);
 
            /* Now process the whole block */
            while (Block < BlockEnd && i < FatLength)
            {
                if (*Block == 0)
                {
                    DPRINT("Found available cluster 0x%x\n", i);
                    DeviceExt->LastAvailableCluster = *Cluster = i;
                    *Block = 0xffff;
                    CcSetDirtyPinnedData(Context, NULL);
                    CcUnpinData(Context);
                    if (DeviceExt->AvailableClustersValid)
                        InterlockedDecrement((PLONG)&DeviceExt->AvailableClusters);
                    return STATUS_SUCCESS;
                }
 
                Block++;
                i++;
            }
 
            CcUnpinData(Context);
        }
 
        FatLength = StartCluster;
        StartCluster = 2;
    }
 
    return STATUS_DISK_FULL;
}

Referenced by VfatMount().

FAT16GetDirtyStatus()

NTSTATUS FAT16GetDirtyStatus	(	PDEVICE_EXTENSION	DeviceExt,
		PBOOLEAN	DirtyStatus
	)

Definition at line 858 of file fat.c.

{
    LARGE_INTEGER Offset;
    ULONG Length;
#ifdef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    NTSTATUS Status;
#else
    PVOID Context;
#endif
    struct _BootSector * Sector;
 
    /* We'll read the bootsector at 0 */
    Offset.QuadPart = 0;
    Length = DeviceExt->FatInfo.BytesPerSector;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Go through Cc for this */
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->VolumeFcb->FileObject, &Offset, Length, PIN_WAIT, &Context, (PVOID *)&Sector);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
#else
    /* No Cc, do it the old way:
     * - Allocate a big enough buffer
     * - And read the disk
     */
    Sector = ExAllocatePoolWithTag(NonPagedPool, Length, TAG_BUFFER);
    if (Sector == NULL)
    {
        *DirtyStatus = TRUE;
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Status = VfatReadDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    if  (!NT_SUCCESS(Status))
    {
        *DirtyStatus = TRUE;
        ExFreePoolWithTag(Sector, TAG_BUFFER);
        return Status;
    }
#endif
 
    /* Make sure we have a boot sector...
     * FIXME: This check is a bit lame and should be improved
     */
    if (Sector->Signatur1 != 0xaa55)
    {
        /* Set we are dirty so that we don't attempt anything */
        *DirtyStatus = TRUE;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
        CcUnpinData(Context);
#else
        ExFreePoolWithTag(Sector, TAG_BUFFER);
#endif
        return STATUS_DISK_CORRUPT_ERROR;
    }
 
    /* Return the status of the dirty bit */
    if (Sector->Res1 & FAT_DIRTY_BIT)
        *DirtyStatus = TRUE;
    else
        *DirtyStatus = FALSE;
 
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    CcUnpinData(Context);
#else
    ExFreePoolWithTag(Sector, TAG_BUFFER);
#endif
    return STATUS_SUCCESS;
}

Referenced by VfatMount().

FAT16GetNextCluster()

NTSTATUS FAT16GetNextCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	CurrentCluster,
		PULONG	NextCluster
	)

Definition at line 77 of file fat.c.

{
    NTSTATUS Status = STATUS_SUCCESS;
    PVOID BaseAddress;
    ULONG FATOffset;
    ULONG ChunkSize;
    PVOID Context;
    LARGE_INTEGER Offset;
 
    ChunkSize = CACHEPAGESIZE(DeviceExt);
    FATOffset = CurrentCluster * 2;
    Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
    _SEH2_TRY
    {
        CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, MAP_WAIT, &Context, &BaseAddress);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    CurrentCluster = *((PUSHORT)((char*)BaseAddress + (FATOffset % ChunkSize)));
    if (CurrentCluster >= 0xfff8 && CurrentCluster <= 0xffff)
        CurrentCluster = 0xffffffff;
 
    if (CurrentCluster == 0)
    {
        DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
        Status = STATUS_FILE_CORRUPT_ERROR;
        if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
            ASSERT(CurrentCluster != 0);
    }
 
    CcUnpinData(Context);
    *NextCluster = CurrentCluster;
    return Status;
}

Referenced by VfatMount().

FAT16SetDirtyStatus()

NTSTATUS FAT16SetDirtyStatus	(	PDEVICE_EXTENSION	DeviceExt,
		BOOLEAN	DirtyStatus
	)

Definition at line 1044 of file fat.c.

{
    LARGE_INTEGER Offset;
    ULONG Length;
#ifdef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    NTSTATUS Status;
#else
    PVOID Context;
#endif
    struct _BootSector * Sector;
 
    /* We'll read (and then write) the bootsector at 0 */
    Offset.QuadPart = 0;
    Length = DeviceExt->FatInfo.BytesPerSector;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Go through Cc for this */
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->VolumeFcb->FileObject, &Offset, Length, PIN_WAIT, &Context, (PVOID *)&Sector);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
#else
    /* No Cc, do it the old way:
     * - Allocate a big enough buffer
     * - And read the disk
     */
    Sector = ExAllocatePoolWithTag(NonPagedPool, Length, TAG_BUFFER);
    if (Sector == NULL)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Status = VfatReadDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    if  (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(Sector, TAG_BUFFER);
        return Status;
    }
#endif
 
    /* Make sure we have a boot sector...
     * FIXME: This check is a bit lame and should be improved
     */
    if (Sector->Signatur1 != 0xaa55)
    {
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
        CcUnpinData(Context);
#else
        ExFreePoolWithTag(Sector, TAG_BUFFER);
#endif
        return STATUS_DISK_CORRUPT_ERROR;
    }
 
    /* Modify the dirty bit status according
     * to caller needs
     */
    if (!DirtyStatus)
    {
        Sector->Res1 &= ~FAT_DIRTY_BIT;
    }
    else
    {
        Sector->Res1 |= FAT_DIRTY_BIT;
    }
 
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Mark boot sector dirty so that it gets written to the disk */
    CcSetDirtyPinnedData(Context, NULL);
    CcUnpinData(Context);
    return STATUS_SUCCESS;
#else
    /* Write back the boot sector to the disk */
    Status = VfatWriteDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    ExFreePoolWithTag(Sector, TAG_BUFFER);
    return Status;
#endif
}

Referenced by VfatMount().

FAT16WriteCluster()

NTSTATUS FAT16WriteCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	ClusterToWrite,
		ULONG	NewValue,
		PULONG	OldValue
	)

Definition at line 621 of file fat.c.

{
    PVOID BaseAddress;
    ULONG FATOffset;
    ULONG ChunkSize;
    PVOID Context;
    LARGE_INTEGER Offset;
    PUSHORT Cluster;
 
    ChunkSize = CACHEPAGESIZE(DeviceExt);
    FATOffset = ClusterToWrite * 2;
    Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    DPRINT("Writing 0x%x for offset 0x%x 0x%x\n", NewValue, FATOffset,
           ClusterToWrite);
    Cluster = ((PUSHORT)((char*)BaseAddress + (FATOffset % ChunkSize)));
    *OldValue = *Cluster;
    *Cluster = (USHORT)NewValue;
    CcSetDirtyPinnedData(Context, NULL);
    CcUnpinData(Context);
    return STATUS_SUCCESS;
}

Referenced by VfatMount().

FAT32FindAndMarkAvailableCluster()

NTSTATUS FAT32FindAndMarkAvailableCluster	(	PDEVICE_EXTENSION	DeviceExt,
		PULONG	Cluster
	)

Definition at line 312 of file fat.c.

{
    ULONG FatLength;
    ULONG StartCluster;
    ULONG i, j;
    PVOID BaseAddress;
    ULONG ChunkSize;
    PVOID Context;
    LARGE_INTEGER Offset;
    PULONG Block;
    PULONG BlockEnd;
 
    ChunkSize = CACHEPAGESIZE(DeviceExt);
    FatLength = (DeviceExt->FatInfo.NumberOfClusters + 2);
    *Cluster = 0;
    StartCluster = DeviceExt->LastAvailableCluster;
 
    for (j = 0; j < 2; j++)
    {
        for (i = StartCluster; i < FatLength;)
        {
            Offset.QuadPart = ROUND_DOWN(i * 4, ChunkSize);
            _SEH2_TRY
            {
                CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
            }
            _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
            {
                DPRINT1("CcPinRead(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, ChunkSize);
                _SEH2_YIELD(return _SEH2_GetExceptionCode());
            }
            _SEH2_END;
            Block = (PULONG)((ULONG_PTR)BaseAddress + (i * 4) % ChunkSize);
            BlockEnd = (PULONG)((ULONG_PTR)BaseAddress + ChunkSize);
 
            /* Now process the whole block */
            while (Block < BlockEnd && i < FatLength)
            {
                if ((*Block & 0x0fffffff) == 0)
                {
                    DPRINT("Found available cluster 0x%x\n", i);
                    DeviceExt->LastAvailableCluster = *Cluster = i;
                    *Block = 0x0fffffff;
                    CcSetDirtyPinnedData(Context, NULL);
                    CcUnpinData(Context);
                    if (DeviceExt->AvailableClustersValid)
                        InterlockedDecrement((PLONG)&DeviceExt->AvailableClusters);
                    return STATUS_SUCCESS;
                }
 
                Block++;
                i++;
            }
 
            CcUnpinData(Context);
        }
        FatLength = StartCluster;
        StartCluster = 2;
    }
    return STATUS_DISK_FULL;
}

Referenced by VfatMount().

FAT32GetDirtyStatus()

NTSTATUS FAT32GetDirtyStatus	(	PDEVICE_EXTENSION	DeviceExt,
		PBOOLEAN	DirtyStatus
	)

Definition at line 936 of file fat.c.

{
    LARGE_INTEGER Offset;
    ULONG Length;
#ifdef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    NTSTATUS Status;
#else
    PVOID Context;
#endif
    struct _BootSector32 * Sector;
 
    /* We'll read the bootsector at 0 */
    Offset.QuadPart = 0;
    Length = DeviceExt->FatInfo.BytesPerSector;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Go through Cc for this */
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->VolumeFcb->FileObject, &Offset, Length, PIN_WAIT, &Context, (PVOID *)&Sector);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
#else
    /* No Cc, do it the old way:
     * - Allocate a big enough buffer
     * - And read the disk
     */
    Sector = ExAllocatePoolWithTag(NonPagedPool, Length, TAG_BUFFER);
    if (Sector == NULL)
    {
        *DirtyStatus = TRUE;
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Status = VfatReadDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    if  (!NT_SUCCESS(Status))
    {
        *DirtyStatus = TRUE;
        ExFreePoolWithTag(Sector, TAG_BUFFER);
        return Status;
    }
#endif
 
    /* Make sure we have a boot sector...
     * FIXME: This check is a bit lame and should be improved
     */
    if (Sector->Signature1 != 0xaa55)
    {
        /* Set we are dirty so that we don't attempt anything */
        *DirtyStatus = TRUE;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
        CcUnpinData(Context);
#else
        ExFreePoolWithTag(Sector, TAG_BUFFER);
#endif
        return STATUS_DISK_CORRUPT_ERROR;
    }
 
    /* Return the status of the dirty bit */
    if (Sector->Res4 & FAT_DIRTY_BIT)
        *DirtyStatus = TRUE;
    else
        *DirtyStatus = FALSE;
 
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    CcUnpinData(Context);
#else
    ExFreePoolWithTag(Sector, TAG_BUFFER);
#endif
    return STATUS_SUCCESS;
}

Referenced by VfatMount().

FAT32GetNextCluster()

NTSTATUS FAT32GetNextCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	CurrentCluster,
		PULONG	NextCluster
	)

Definition at line 28 of file fat.c.

{
    NTSTATUS Status = STATUS_SUCCESS;
    PVOID BaseAddress;
    ULONG FATOffset;
    ULONG ChunkSize;
    PVOID Context = NULL;
    LARGE_INTEGER Offset;
 
    ChunkSize = CACHEPAGESIZE(DeviceExt);
    FATOffset = CurrentCluster * sizeof(ULONG);
    Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
    _SEH2_TRY
    {
        if (!CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, MAP_WAIT, &Context, &BaseAddress))
        {
            NT_ASSERT(FALSE);
            return STATUS_UNSUCCESSFUL;
        }
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    CurrentCluster = (*(PULONG)((char*)BaseAddress + (FATOffset % ChunkSize))) & 0x0fffffff;
    if (CurrentCluster >= 0xffffff8 && CurrentCluster <= 0xfffffff)
        CurrentCluster = 0xffffffff;
 
    if (CurrentCluster == 0)
    {
        DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
        Status = STATUS_FILE_CORRUPT_ERROR;
        if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
            ASSERT(CurrentCluster != 0);
    }
    CcUnpinData(Context);
    *NextCluster = CurrentCluster;
    return Status;
}

Referenced by VfatMount().

FAT32SetDirtyStatus()

NTSTATUS FAT32SetDirtyStatus	(	PDEVICE_EXTENSION	DeviceExt,
		BOOLEAN	DirtyStatus
	)

Definition at line 1129 of file fat.c.

{
    LARGE_INTEGER Offset;
    ULONG Length;
#ifdef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    NTSTATUS Status;
#else
    PVOID Context;
#endif
    struct _BootSector32 * Sector;
 
    /* We'll read (and then write) the bootsector at 0 */
    Offset.QuadPart = 0;
    Length = DeviceExt->FatInfo.BytesPerSector;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Go through Cc for this */
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->VolumeFcb->FileObject, &Offset, Length, PIN_WAIT, &Context, (PVOID *)&Sector);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
#else
    /* No Cc, do it the old way:
     * - Allocate a big enough buffer
     * - And read the disk
     */
    Sector = ExAllocatePoolWithTag(NonPagedPool, Length, TAG_BUFFER);
    if (Sector == NULL)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Status = VfatReadDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    if  (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(Sector, TAG_BUFFER);
        return Status;
    }
#endif
 
    /* Make sure we have a boot sector...
     * FIXME: This check is a bit lame and should be improved
     */
    if (Sector->Signature1 != 0xaa55)
    {
        ASSERT(FALSE);
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
        CcUnpinData(Context);
#else
        ExFreePoolWithTag(Sector, TAG_BUFFER);
#endif
        return STATUS_DISK_CORRUPT_ERROR;
    }
 
    /* Modify the dirty bit status according
     * to caller needs
     */
    if (!DirtyStatus)
    {
        Sector->Res4 &= ~FAT_DIRTY_BIT;
    }
    else
    {
        Sector->Res4 |= FAT_DIRTY_BIT;
    }
 
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Mark boot sector dirty so that it gets written to the disk */
    CcSetDirtyPinnedData(Context, NULL);
    CcUnpinData(Context);
    return STATUS_SUCCESS;
#else
    /* Write back the boot sector to the disk */
    Status = VfatWriteDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    ExFreePoolWithTag(Sector, TAG_BUFFER);
    return Status;
#endif
}

Referenced by VfatMount().

FAT32UpdateFreeClustersCount()

NTSTATUS FAT32UpdateFreeClustersCount

(

PDEVICE_EXTENSION

DeviceExt

)

Definition at line 1215 of file fat.c.

{
    LARGE_INTEGER Offset;
    ULONG Length;
#ifdef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    NTSTATUS Status;
#else
    PVOID Context;
#endif
    struct _FsInfoSector * Sector;
 
    if (!DeviceExt->AvailableClustersValid)
    {
        return STATUS_INVALID_PARAMETER;
    }
 
    /* We'll read (and then write) the fsinfo sector */
    Offset.QuadPart = DeviceExt->FatInfo.FSInfoSector * DeviceExt->FatInfo.BytesPerSector;
    Length = DeviceExt->FatInfo.BytesPerSector;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Go through Cc for this */
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->VolumeFcb->FileObject, &Offset, Length, PIN_WAIT, &Context, (PVOID *)&Sector);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
#else
    /* No Cc, do it the old way:
     * - Allocate a big enough buffer
     * - And read the disk
     */
    Sector = ExAllocatePoolWithTag(NonPagedPool, Length, TAG_BUFFER);
    if (Sector == NULL)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    Status = VfatReadDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    if  (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(Sector, TAG_BUFFER);
        return Status;
    }
#endif
 
    /* Make sure we have a FSINFO sector */
    if (Sector->ExtBootSignature2 != 0x41615252 ||
        Sector->FSINFOSignature != 0x61417272 ||
        Sector->Signatur2 != 0xaa550000)
    {
        ASSERT(FALSE);
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
        CcUnpinData(Context);
#else
        ExFreePoolWithTag(Sector, TAG_BUFFER);
#endif
        return STATUS_DISK_CORRUPT_ERROR;
    }
 
    /* Update the free clusters count */
    Sector->FreeCluster = InterlockedCompareExchange((PLONG)&DeviceExt->AvailableClusters, 0, 0);
 
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
    /* Mark FSINFO sector dirty so that it gets written to the disk */
    CcSetDirtyPinnedData(Context, NULL);
    CcUnpinData(Context);
    return STATUS_SUCCESS;
#else
    /* Write back the FSINFO sector to the disk */
    Status = VfatWriteDisk(DeviceExt->StorageDevice, &Offset, Length, (PUCHAR)Sector, FALSE);
    ExFreePoolWithTag(Sector, TAG_BUFFER);
    return Status;
#endif
}

Referenced by FATAddEntry(), FATDelEntry(), and VfatSetAllocationSizeInformation().

FAT32WriteCluster()

NTSTATUS FAT32WriteCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	ClusterToWrite,
		ULONG	NewValue,
		PULONG	OldValue
	)

Definition at line 661 of file fat.c.

{
    PVOID BaseAddress;
    ULONG FATOffset;
    ULONG ChunkSize;
    PVOID Context;
    LARGE_INTEGER Offset;
    PULONG Cluster;
 
    ChunkSize = CACHEPAGESIZE(DeviceExt);
 
    FATOffset = (ClusterToWrite * 4);
    Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
    _SEH2_TRY
    {
        CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    DPRINT("Writing 0x%x for offset 0x%x 0x%x\n", NewValue, FATOffset,
           ClusterToWrite);
    Cluster = ((PULONG)((char*)BaseAddress + (FATOffset % ChunkSize)));
    *OldValue = *Cluster & 0x0fffffff;
    *Cluster = (*Cluster & 0xf0000000) | (NewValue & 0x0fffffff);
 
    CcSetDirtyPinnedData(Context, NULL);
    CcUnpinData(Context);
 
    return STATUS_SUCCESS;
}

Referenced by VfatMount().

FindFile()

NTSTATUS FindFile	(	PDEVICE_EXTENSION	DeviceExt,
		PVFATFCB	Parent,
		PUNICODE_STRING	FileToFindU,
		PVFAT_DIRENTRY_CONTEXT	DirContext,
		BOOLEAN	First
	)

Definition at line 83 of file create.c.

{
    PWCHAR PathNameBuffer;
    USHORT PathNameBufferLength;
    NTSTATUS Status;
    PVOID Context = NULL;
    PVOID Page;
    PVFATFCB rcFcb;
    BOOLEAN Found;
    UNICODE_STRING PathNameU;
    UNICODE_STRING FileToFindUpcase;
    BOOLEAN WildCard;
    BOOLEAN IsFatX = vfatVolumeIsFatX(DeviceExt);
 
    DPRINT("FindFile(Parent %p, FileToFind '%wZ', DirIndex: %u)\n",
           Parent, FileToFindU, DirContext->DirIndex);
    DPRINT("FindFile: Path %wZ\n",&Parent->PathNameU);
 
    PathNameBufferLength = LONGNAME_MAX_LENGTH * sizeof(WCHAR);
    PathNameBuffer = ExAllocatePoolWithTag(NonPagedPool, PathNameBufferLength + sizeof(WCHAR), TAG_NAME);
    if (!PathNameBuffer)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    PathNameU.Buffer = PathNameBuffer;
    PathNameU.Length = 0;
    PathNameU.MaximumLength = PathNameBufferLength;
 
    DirContext->LongNameU.Length = 0;
    DirContext->ShortNameU.Length = 0;
 
    WildCard = FsRtlDoesNameContainWildCards(FileToFindU);
 
    if (WildCard == FALSE)
    {
        /* if there is no '*?' in the search name, than look first for an existing fcb */
        RtlCopyUnicodeString(&PathNameU, &Parent->PathNameU);
        if (!vfatFCBIsRoot(Parent))
        {
            PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = L'\\';
            PathNameU.Length += sizeof(WCHAR);
        }
        RtlAppendUnicodeStringToString(&PathNameU, FileToFindU);
        PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = 0;
        rcFcb = vfatGrabFCBFromTable(DeviceExt, &PathNameU);
        if (rcFcb)
        {
            ULONG startIndex = rcFcb->startIndex;
            if (IsFatX && !vfatFCBIsRoot(Parent))
            {
                startIndex += 2;
            }
            if(startIndex >= DirContext->DirIndex)
            {
                RtlCopyUnicodeString(&DirContext->LongNameU, &rcFcb->LongNameU);
                RtlCopyUnicodeString(&DirContext->ShortNameU, &rcFcb->ShortNameU);
                RtlCopyMemory(&DirContext->DirEntry, &rcFcb->entry, sizeof(DIR_ENTRY));
                DirContext->StartIndex = rcFcb->startIndex;
                DirContext->DirIndex = rcFcb->dirIndex;
                DPRINT("FindFile: new Name %wZ, DirIndex %u (%u)\n",
                    &DirContext->LongNameU, DirContext->DirIndex, DirContext->StartIndex);
                Status = STATUS_SUCCESS;
            }
            else
            {
                DPRINT("FCB not found for %wZ\n", &PathNameU);
                Status = STATUS_UNSUCCESSFUL;
            }
            vfatReleaseFCB(DeviceExt, rcFcb);
            ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
            return Status;
        }
    }
 
    /* FsRtlIsNameInExpression need the searched string to be upcase,
    * even if IgnoreCase is specified */
    Status = RtlUpcaseUnicodeString(&FileToFindUpcase, FileToFindU, TRUE);
    if (!NT_SUCCESS(Status))
    {
        ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
        return Status;
    }
 
    while (TRUE)
    {
        Status = VfatGetNextDirEntry(DeviceExt, &Context, &Page, Parent, DirContext, First);
        First = FALSE;
        if (Status == STATUS_NO_MORE_ENTRIES)
        {
            break;
        }
        if (ENTRY_VOLUME(IsFatX, &DirContext->DirEntry))
        {
            DirContext->DirIndex++;
            continue;
        }
        if (DirContext->LongNameU.Length == 0 ||
            DirContext->ShortNameU.Length == 0)
        {
            DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
            if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
            {
                ASSERT(DirContext->LongNameU.Length != 0 &&
                       DirContext->ShortNameU.Length != 0);
            }
            DirContext->DirIndex++;
            continue;
        }
        if (WildCard)
        {
            Found = FsRtlIsNameInExpression(&FileToFindUpcase, &DirContext->LongNameU, TRUE, NULL) ||
                FsRtlIsNameInExpression(&FileToFindUpcase, &DirContext->ShortNameU, TRUE, NULL);
        }
        else
        {
            Found = FsRtlAreNamesEqual(&DirContext->LongNameU, FileToFindU, TRUE, NULL) ||
                FsRtlAreNamesEqual(&DirContext->ShortNameU, FileToFindU, TRUE, NULL);
        }
 
        if (Found)
        {
            if (WildCard)
            {
                RtlCopyUnicodeString(&PathNameU, &Parent->PathNameU);
                if (!vfatFCBIsRoot(Parent))
                {
                    PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = L'\\';
                    PathNameU.Length += sizeof(WCHAR);
                }
                RtlAppendUnicodeStringToString(&PathNameU, &DirContext->LongNameU);
                PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = 0;
                rcFcb = vfatGrabFCBFromTable(DeviceExt, &PathNameU);
                if (rcFcb != NULL)
                {
                    RtlCopyMemory(&DirContext->DirEntry, &rcFcb->entry, sizeof(DIR_ENTRY));
                    vfatReleaseFCB(DeviceExt, rcFcb);
                }
            }
            DPRINT("%u\n", DirContext->LongNameU.Length);
            DPRINT("FindFile: new Name %wZ, DirIndex %u\n",
                &DirContext->LongNameU, DirContext->DirIndex);
 
            if (Context)
            {
                CcUnpinData(Context);
            }
            RtlFreeUnicodeString(&FileToFindUpcase);
            ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
            return STATUS_SUCCESS;
        }
        DirContext->DirIndex++;
    }
 
    if (Context)
    {
        CcUnpinData(Context);
    }
 
    RtlFreeUnicodeString(&FileToFindUpcase);
    ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
    return Status;
}

FsdDosDateTimeToSystemTime()

BOOLEAN FsdDosDateTimeToSystemTime	(	PDEVICE_EXTENSION	DeviceExt,
		USHORT	DosDate,
		USHORT	DosTime,
		PLARGE_INTEGER	SystemTime
	)

Definition at line 21 of file dir.c.

{
    PDOSTIME pdtime = (PDOSTIME)&DosTime;
    PDOSDATE pddate = (PDOSDATE)&DosDate;
    TIME_FIELDS TimeFields;
    LARGE_INTEGER LocalTime;
 
    if (SystemTime == NULL)
        return FALSE;
 
    TimeFields.Milliseconds = 0;
    TimeFields.Second = pdtime->Second * 2;
    TimeFields.Minute = pdtime->Minute;
    TimeFields.Hour = pdtime->Hour;
 
    TimeFields.Day = pddate->Day;
    TimeFields.Month = pddate->Month;
    TimeFields.Year = (CSHORT)(DeviceExt->BaseDateYear + pddate->Year);
 
    RtlTimeFieldsToTime(&TimeFields, &LocalTime);
    ExLocalTimeToSystemTime(&LocalTime, SystemTime);
 
    return TRUE;
}

Referenced by FsdGetFsVolumeInformation(), VfatGetBasicInformation(), VfatGetFileBothInformation(), VfatGetFileDirectoryInformation(), VfatGetFileFullDirectoryInformation(), and VfatGetNetworkOpenInformation().

FsdSystemTimeToDosDateTime()

BOOLEAN FsdSystemTimeToDosDateTime	(	PDEVICE_EXTENSION	DeviceExt,
		PLARGE_INTEGER	SystemTime,
		USHORT *	pDosDate,
		USHORT *	pDosTime
	)

GetDirtyStatus()

NTSTATUS GetDirtyStatus	(	PDEVICE_EXTENSION	DeviceExt,
		PBOOLEAN	DirtyStatus
	)

Definition at line 831 of file fat.c.

{
    NTSTATUS Status;
 
    DPRINT("GetDirtyStatus(DeviceExt %p)\n", DeviceExt);
 
    /* FAT12 has no dirty bit */
    if (DeviceExt->FatInfo.FatType == FAT12)
    {
        *DirtyStatus = FALSE;
        return STATUS_SUCCESS;
    }
 
    /* Not really in the FAT, but share the lock because
     * we're really low-level and shouldn't happent that often
     * And call the appropriate function
     */
    ExAcquireResourceSharedLite(&DeviceExt->FatResource, TRUE);
    Status = DeviceExt->GetDirtyStatus(DeviceExt, DirtyStatus);
    ExReleaseResourceLite(&DeviceExt->FatResource);
 
    return Status;
}

Referenced by VfatMount().

GetNextCluster()

NTSTATUS GetNextCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	CurrentCluster,
		PULONG	NextCluster
	)

Definition at line 744 of file fat.c.

{
    NTSTATUS Status;
 
    DPRINT("GetNextCluster(DeviceExt %p, CurrentCluster %x)\n",
           DeviceExt, CurrentCluster);
 
    if (CurrentCluster == 0)
    {
        DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
        if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
            ASSERT(CurrentCluster != 0);
        return STATUS_FILE_CORRUPT_ERROR;
    }
 
    ExAcquireResourceSharedLite(&DeviceExt->FatResource, TRUE);
    Status = DeviceExt->GetNextCluster(DeviceExt, CurrentCluster, NextCluster);
    ExReleaseResourceLite(&DeviceExt->FatResource);
 
    return Status;
}

Referenced by FATDelEntry(), FATXDelEntry(), NextCluster(), and OffsetToCluster().

GetNextClusterExtend()

NTSTATUS GetNextClusterExtend	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	CurrentCluster,
		PULONG	NextCluster
	)

Definition at line 773 of file fat.c.

{
    ULONG NewCluster;
    NTSTATUS Status;
 
    DPRINT("GetNextClusterExtend(DeviceExt %p, CurrentCluster %x)\n",
           DeviceExt, CurrentCluster);
 
    ExAcquireResourceExclusiveLite(&DeviceExt->FatResource, TRUE);
    /*
     * If the file hasn't any clusters allocated then we need special
     * handling
     */
    if (CurrentCluster == 0)
    {
        Status = DeviceExt->FindAndMarkAvailableCluster(DeviceExt, &NewCluster);
        if (!NT_SUCCESS(Status))
        {
            ExReleaseResourceLite(&DeviceExt->FatResource);
            return Status;
        }
 
        *NextCluster = NewCluster;
        ExReleaseResourceLite(&DeviceExt->FatResource);
        return STATUS_SUCCESS;
    }
 
    Status = DeviceExt->GetNextCluster(DeviceExt, CurrentCluster, NextCluster);
 
    if ((*NextCluster) == 0xFFFFFFFF)
    {
        /* We are after last existing cluster, we must add one to file */
        /* Firstly, find the next available open allocation unit and
           mark it as end of file */
        Status = DeviceExt->FindAndMarkAvailableCluster(DeviceExt, &NewCluster);
        if (!NT_SUCCESS(Status))
        {
            ExReleaseResourceLite(&DeviceExt->FatResource);
            return Status;
        }
 
        /* Now, write the AU of the LastCluster with the value of the newly
           found AU */
        WriteCluster(DeviceExt, CurrentCluster, NewCluster);
        *NextCluster = NewCluster;
    }
 
    ExReleaseResourceLite(&DeviceExt->FatResource);
    return Status;
}

Referenced by NextCluster(), and OffsetToCluster().

IsDotOrDotDot()

BOOLEAN IsDotOrDotDot

(

PCUNICODE_STRING

Name

)

Definition at line 28 of file string.c.

{
    return ((Name->Length == sizeof(WCHAR) && Name->Buffer[0] == L'.') ||
        (Name->Length == 2 * sizeof(WCHAR) && Name->Buffer[0] == L'.' && Name->Buffer[1] == L'.'));
}

Referenced by VfatCreateFile(), VfatOpenFile(), VfatSetDispositionInformation(), and VfatSetRenameInformation().

NextCluster()

NTSTATUS NextCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	FirstCluster,
		PULONG	CurrentCluster,
		BOOLEAN	Extend
	)

Definition at line 38 of file rw.c.

{
    if (FirstCluster == 1)
    {
        (*CurrentCluster) += DeviceExt->FatInfo.SectorsPerCluster;
        return STATUS_SUCCESS;
    }
    else
    {
        if (Extend)
            return GetNextClusterExtend(DeviceExt, (*CurrentCluster), CurrentCluster);
        else
            return GetNextCluster(DeviceExt, (*CurrentCluster), CurrentCluster);
    }
}

Referenced by FAT12GetNextCluster(), FAT16GetNextCluster(), FAT32GetNextCluster(), FATAddEntry(), FATDelEntry(), FATXDelEntry(), GetNextCluster(), GetNextClusterExtend(), VfatGetRetrievalPointers(), vfatInitFCBFromDirEntry(), vfatMakeRootFCB(), VfatReadFileData(), VfatSetAllocationSizeInformation(), and VfatWriteFileData().

OffsetToCluster()

NTSTATUS OffsetToCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	FirstCluster,
		ULONG	FileOffset,
		PULONG	Cluster,
		BOOLEAN	Extend
	)

Definition at line 59 of file rw.c.

{
    ULONG CurrentCluster;
    ULONG i;
    NTSTATUS Status;
/*
    DPRINT("OffsetToCluster(DeviceExt %x, Fcb %x, FirstCluster %x,"
           " FileOffset %x, Cluster %x, Extend %d)\n", DeviceExt,
           Fcb, FirstCluster, FileOffset, Cluster, Extend);
*/
    if (FirstCluster == 0)
    {
        DbgPrint("OffsetToCluster is called with FirstCluster = 0!\n");
        ASSERT(FALSE);
    }
 
    if (FirstCluster == 1)
    {
        /* root of FAT16 or FAT12 */
        *Cluster = DeviceExt->FatInfo.rootStart + FileOffset
            / (DeviceExt->FatInfo.BytesPerCluster) * DeviceExt->FatInfo.SectorsPerCluster;
        return STATUS_SUCCESS;
    }
    else
    {
        CurrentCluster = FirstCluster;
        if (Extend)
        {
            for (i = 0; i < FileOffset / DeviceExt->FatInfo.BytesPerCluster; i++)
            {
                Status = GetNextClusterExtend (DeviceExt, CurrentCluster, &CurrentCluster);
                if (!NT_SUCCESS(Status))
                    return Status;
            }
            *Cluster = CurrentCluster;
        }
        else
        {
            for (i = 0; i < FileOffset / DeviceExt->FatInfo.BytesPerCluster; i++)
            {
                Status = GetNextCluster (DeviceExt, CurrentCluster, &CurrentCluster);
                if (!NT_SUCCESS(Status))
                    return Status;
            }
            *Cluster = CurrentCluster;
       }
       return STATUS_SUCCESS;
   }
}

Referenced by VfatGetRetrievalPointers(), VfatReadFileData(), VfatSetAllocationSizeInformation(), and VfatWriteFileData().

SetDirtyStatus()

NTSTATUS SetDirtyStatus	(	PDEVICE_EXTENSION	DeviceExt,
		BOOLEAN	DirtyStatus
	)

Definition at line 1017 of file fat.c.

{
    NTSTATUS Status;
 
    DPRINT("SetDirtyStatus(DeviceExt %p, DirtyStatus %d)\n", DeviceExt, DirtyStatus);
 
    /* FAT12 has no dirty bit */
    if (DeviceExt->FatInfo.FatType == FAT12)
    {
        return STATUS_SUCCESS;
    }
 
    /* Not really in the FAT, but share the lock because
     * we're really low-level and shouldn't happent that often
     * And call the appropriate function
     * Acquire exclusive because we will modify ondisk value
     */
    ExAcquireResourceExclusiveLite(&DeviceExt->FatResource, TRUE);
    Status = DeviceExt->SetDirtyStatus(DeviceExt, DirtyStatus);
    ExReleaseResourceLite(&DeviceExt->FatResource);
 
    return Status;
}

Referenced by VfatDismountVolume(), VfatLockOrUnlockVolume(), VfatMarkVolumeDirty(), VfatMount(), and VfatShutdown().

vfat8Dot3ToString()

VOID vfat8Dot3ToString	(	PFAT_DIR_ENTRY	pEntry,
		PUNICODE_STRING	NameU
	)

Definition at line 19 of file create.c.

{
    OEM_STRING StringA;
    USHORT Length;
    CHAR  cString[12];
 
    RtlCopyMemory(cString, pEntry->ShortName, 11);
    cString[11] = 0;
    if (cString[0] == 0x05)
    {
        cString[0] = 0xe5;
    }
 
    StringA.Buffer = cString;
    for (StringA.Length = 0;
         StringA.Length < 8 && StringA.Buffer[StringA.Length] != ' ';
         StringA.Length++);
    StringA.MaximumLength = StringA.Length;
 
    RtlOemStringToUnicodeString(NameU, &StringA, FALSE);
 
    if (BooleanFlagOn(pEntry->lCase, VFAT_CASE_LOWER_BASE))
    {
        RtlDowncaseUnicodeString(NameU, NameU, FALSE);
    }
 
    if (cString[8] != ' ')
    {
        Length = NameU->Length;
        NameU->Buffer += Length / sizeof(WCHAR);
        if (!FAT_ENTRY_VOLUME(pEntry))
        {
            Length += sizeof(WCHAR);
            NameU->Buffer[0] = L'.';
            NameU->Buffer++;
        }
        NameU->Length = 0;
        NameU->MaximumLength -= Length;
 
        StringA.Buffer = &cString[8];
        for (StringA.Length = 0;
        StringA.Length < 3 && StringA.Buffer[StringA.Length] != ' ';
        StringA.Length++);
        StringA.MaximumLength = StringA.Length;
        RtlOemStringToUnicodeString(NameU, &StringA, FALSE);
        if (BooleanFlagOn(pEntry->lCase, VFAT_CASE_LOWER_EXT))
        {
            RtlDowncaseUnicodeString(NameU, NameU, FALSE);
        }
        NameU->Buffer -= Length / sizeof(WCHAR);
        NameU->Length += Length;
        NameU->MaximumLength += Length;
    }
 
    NameU->Buffer[NameU->Length / sizeof(WCHAR)] = 0;
    DPRINT("'%wZ'\n", NameU);
}

Referenced by FATGetNextDirEntry(), and ReadVolumeLabel().

VfatAcquireForLazyWrite()

BOOLEAN NTAPI VfatAcquireForLazyWrite	(	IN PVOID	Context,
		IN BOOLEAN	Wait
	)

Definition at line 723 of file fastio.c.

{
    PVFATFCB Fcb = (PVFATFCB)Context;
    ASSERT(Fcb);
    DPRINT("VfatAcquireForLazyWrite(): Fcb %p\n", Fcb);
 
    if (!ExAcquireResourceExclusiveLite(&(Fcb->MainResource), Wait))
    {
        DPRINT("VfatAcquireForLazyWrite(): ExReleaseResourceLite failed.\n");
        return FALSE;
    }
    return TRUE;
}

Referenced by DriverEntry().

VfatAddEntry()

FORCEINLINE NTSTATUS VfatAddEntry	(	PDEVICE_EXTENSION	DeviceExt,
		PUNICODE_STRING	NameU,
		struct _VFATFCB **	Fcb,
		struct _VFATFCB *	ParentFcb,
		ULONG	RequestedOptions,
		UCHAR	ReqAttr,
		struct _VFAT_MOVE_CONTEXT *	MoveContext
	)

Definition at line 375 of file vfat.h.

{
    return DeviceExt->Dispatch.AddEntry(DeviceExt, NameU, Fcb, ParentFcb, RequestedOptions, ReqAttr, MoveContext);
}

Referenced by VfatCreateFile(), and VfatMoveEntry().

vfatAttachFCBToFileObject()

NTSTATUS vfatAttachFCBToFileObject	(	PDEVICE_EXTENSION	vcb,
		PVFATFCB	fcb,
		PFILE_OBJECT	fileObject
	)

Definition at line 754 of file fcb.c.

{
    PVFATCCB newCCB;
 
#ifdef KDBG
    if (DebugFile.Buffer != NULL && FsRtlIsNameInExpression(&DebugFile, &fcb->LongNameU, FALSE, NULL))
    {
        DPRINT1("Attaching %p to %p (%d)\n", fcb, fileObject, fcb->RefCount);
    }
#endif
 
    newCCB = ExAllocateFromNPagedLookasideList(&VfatGlobalData->CcbLookasideList);
    if (newCCB == NULL)
    {
        return  STATUS_INSUFFICIENT_RESOURCES;
    }
    RtlZeroMemory(newCCB, sizeof (VFATCCB));
 
    fileObject->SectionObjectPointer = &fcb->SectionObjectPointers;
    fileObject->FsContext = fcb;
    fileObject->FsContext2 = newCCB;
    fileObject->Vpb = vcb->IoVPB;
    DPRINT("file open: fcb:%p PathName:%wZ\n", fcb, &fcb->PathNameU);
 
#ifdef KDBG
    fcb->Flags &= ~FCB_CLEANED_UP;
    fcb->Flags &= ~FCB_CLOSED;
#endif
 
    return STATUS_SUCCESS;
}

Referenced by VfatCreateFile(), VfatMount(), and VfatOpenFile().

VfatBlockDeviceIoControl()

NTSTATUS VfatBlockDeviceIoControl	(	IN PDEVICE_OBJECT	DeviceObject,
		IN ULONG	CtlCode,
		IN PVOID	InputBuffer,
		IN ULONG	InputBufferSize,
		IN OUT PVOID	OutputBuffer,
		IN OUT PULONG	pOutputBufferSize,
		IN BOOLEAN	Override
	)

Definition at line 430 of file blockdev.c.

{
    PIO_STACK_LOCATION Stack;
    KEVENT Event;
    PIRP Irp;
    IO_STATUS_BLOCK IoStatus;
    NTSTATUS Status;
 
    DPRINT("VfatBlockDeviceIoControl(DeviceObject %p, CtlCode %x, "
           "InputBuffer %p, InputBufferSize %x, OutputBuffer %p, "
           "OutputBufferSize %p (%x)\n", DeviceObject, CtlCode,
           InputBuffer, InputBufferSize, OutputBuffer, OutputBufferSize,
           OutputBufferSize ? *OutputBufferSize : 0);
 
again:
    KeInitializeEvent(&Event, NotificationEvent, FALSE);
 
    DPRINT("Building device I/O control request ...\n");
    Irp = IoBuildDeviceIoControlRequest(CtlCode,
                                        DeviceObject,
                                        InputBuffer,
                                        InputBufferSize,
                                        OutputBuffer,
                                        (OutputBufferSize) ? *OutputBufferSize : 0,
                                        FALSE,
                                        &Event,
                                        &IoStatus);
    if (Irp == NULL)
    {
        DPRINT("IoBuildDeviceIoControlRequest failed\n");
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    if (Override)
    {
        Stack = IoGetNextIrpStackLocation(Irp);
        Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
    }
 
    DPRINT("Calling IO Driver... with irp %p\n", Irp);
    Status = IoCallDriver(DeviceObject, Irp);
 
    DPRINT("Waiting for IO Operation for %p\n", Irp);
    if (Status == STATUS_PENDING)
    {
        DPRINT("Operation pending\n");
        KeWaitForSingleObject (&Event, Suspended, KernelMode, FALSE, NULL);
        DPRINT("Getting IO Status... for %p\n", Irp);
 
        Status = IoStatus.Status;
    }
 
    if (Status == STATUS_VERIFY_REQUIRED)
    {
        PDEVICE_OBJECT DeviceToVerify;
 
        DPRINT1("Media change detected!\n");
 
        /* Find the device to verify and reset the thread field to empty value again. */
        DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
        IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
        Status = IoVerifyVolume(DeviceToVerify,
                                FALSE);
 
        if (NT_SUCCESS(Status))
        {
            DPRINT1("Volume verification successful; Reissuing IOCTL request\n");
            goto again;
        }
    }
 
    if (OutputBufferSize)
    {
        *OutputBufferSize = IoStatus.Information;
    }
 
    DPRINT("Returning Status %x\n", Status);
 
    return Status;
}

Referenced by VfatHasFileSystem(), VfatOpenFile(), and VfatVerify().

VfatBuildRequest()

NTSTATUS NTAPI VfatBuildRequest	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

VfatCheckForDismount()

BOOLEAN VfatCheckForDismount	(	IN PDEVICE_EXTENSION	DeviceExt,
		IN BOOLEAN	Create
	)

Definition at line 495 of file misc.c.

{
    KIRQL OldIrql;
    ULONG UnCleanCount;
    PVPB Vpb;
    BOOLEAN Delete;
 
    DPRINT1("VfatCheckForDismount(%p, %u)\n", DeviceExt, Force);
 
    /* If the VCB is OK (not under uninitialization) and we don't force dismount, do nothing */
    if (BooleanFlagOn(DeviceExt->Flags, VCB_GOOD) && !Force)
    {
        return FALSE;
    }
 
    /*
     * NOTE: In their *CheckForDismount() function, our 3rd-party FS drivers
     * as well as MS' fastfat, perform a comparison check of the current VCB's
     * VPB ReferenceCount with some sort of "dangling"/"residual" open count,
     * depending on whether or not we are in IRP_MJ_CREATE.
     * It seems to be related to the fact that the volume root directory as
     * well as auxiliary data stream(s) are still opened, and only these are
     * allowed to be opened at that moment. After analysis it appears that for
     * the ReactOS' vfatfs, this number is equal to "2".
     */
    UnCleanCount = 2;
 
    /* Lock VPB */
    IoAcquireVpbSpinLock(&OldIrql);
 
    /* Reference it and check if a create is being done */
    Vpb = DeviceExt->IoVPB;
    DPRINT("Vpb->ReferenceCount = %d\n", Vpb->ReferenceCount);
    if (Vpb->ReferenceCount != UnCleanCount || DeviceExt->OpenHandleCount != 0)
    {
        /* If we force-unmount, copy the VPB to our local own to prepare later dismount */
        if (Force && Vpb->RealDevice->Vpb == Vpb && DeviceExt->SpareVPB != NULL)
        {
            RtlZeroMemory(DeviceExt->SpareVPB, sizeof(VPB));
            DeviceExt->SpareVPB->Type = IO_TYPE_VPB;
            DeviceExt->SpareVPB->Size = sizeof(VPB);
            DeviceExt->SpareVPB->RealDevice = DeviceExt->IoVPB->RealDevice;
            DeviceExt->SpareVPB->DeviceObject = NULL;
            DeviceExt->SpareVPB->Flags = DeviceExt->IoVPB->Flags & VPB_REMOVE_PENDING;
            DeviceExt->IoVPB->RealDevice->Vpb = DeviceExt->SpareVPB;
            DeviceExt->SpareVPB = NULL;
            DeviceExt->IoVPB->Flags |= VPB_PERSISTENT;
 
            /* We are uninitializing, the VCB cannot be used anymore */
            ClearFlag(DeviceExt->Flags, VCB_GOOD);
        }
 
        /* Don't do anything for now */
        Delete = FALSE;
    }
    else
    {
        /* Otherwise, delete the volume */
        Delete = TRUE;
 
        /* Swap the VPB with our local own */
        if (Vpb->RealDevice->Vpb == Vpb && DeviceExt->SpareVPB != NULL)
        {
            RtlZeroMemory(DeviceExt->SpareVPB, sizeof(VPB));
            DeviceExt->SpareVPB->Type = IO_TYPE_VPB;
            DeviceExt->SpareVPB->Size = sizeof(VPB);
            DeviceExt->SpareVPB->RealDevice = DeviceExt->IoVPB->RealDevice;
            DeviceExt->SpareVPB->DeviceObject = NULL;
            DeviceExt->SpareVPB->Flags = DeviceExt->IoVPB->Flags & VPB_REMOVE_PENDING;
            DeviceExt->IoVPB->RealDevice->Vpb = DeviceExt->SpareVPB;
            DeviceExt->SpareVPB = NULL;
            DeviceExt->IoVPB->Flags |= VPB_PERSISTENT;
 
            /* We are uninitializing, the VCB cannot be used anymore */
            ClearFlag(DeviceExt->Flags, VCB_GOOD);
        }
 
        /*
         * We defer setting the VPB's DeviceObject to NULL for later because
         * we want to handle the closing of the internal opened meta-files.
         */
 
        /* Clear the mounted and locked flags in the VPB */
        ClearFlag(Vpb->Flags, VPB_MOUNTED | VPB_LOCKED);
    }
 
    /* Release lock and return status */
    IoReleaseVpbSpinLock(OldIrql);
 
    /* If we were to delete, delete volume */
    if (Delete)
    {
        LARGE_INTEGER Zero = {{0,0}};
        PVFATFCB Fcb;
 
        /* We are uninitializing, the VCB cannot be used anymore */
        ClearFlag(DeviceExt->Flags, VCB_GOOD);
 
        /* Invalidate and close the internal opened meta-files */
        if (DeviceExt->RootFcb)
        {
            Fcb = DeviceExt->RootFcb;
            CcUninitializeCacheMap(Fcb->FileObject,
                                   &Zero,
                                   NULL);
            ObDereferenceObject(Fcb->FileObject);
            DeviceExt->RootFcb = NULL;
            vfatDestroyFCB(Fcb);
        }
        if (DeviceExt->VolumeFcb)
        {
            Fcb = DeviceExt->VolumeFcb;
#ifndef VOLUME_IS_NOT_CACHED_WORK_AROUND_IT
            CcUninitializeCacheMap(Fcb->FileObject,
                                   &Zero,
                                   NULL);
            ObDereferenceObject(Fcb->FileObject);
#endif
            DeviceExt->VolumeFcb = NULL;
            vfatDestroyFCB(Fcb);
        }
        if (DeviceExt->FATFileObject)
        {
            Fcb = DeviceExt->FATFileObject->FsContext;
            CcUninitializeCacheMap(DeviceExt->FATFileObject,
                                   &Zero,
                                   NULL);
            DeviceExt->FATFileObject->FsContext = NULL;
            ObDereferenceObject(DeviceExt->FATFileObject);
            DeviceExt->FATFileObject = NULL;
            vfatDestroyFCB(Fcb);
        }
 
        ASSERT(DeviceExt->OverflowQueueCount == 0);
        ASSERT(IsListEmpty(&DeviceExt->OverflowQueue));
        ASSERT(DeviceExt->PostedRequestCount == 0);
 
        /*
         * Now that the closing of the internal opened meta-files has been
         * handled, we can now set the VPB's DeviceObject to NULL.
         */
        Vpb->DeviceObject = NULL;
 
        /* If we have a local VPB, we'll have to delete it
         * but we won't dismount us - something went bad before
         */
        if (DeviceExt->SpareVPB)
        {
            ExFreePool(DeviceExt->SpareVPB);
        }
        /* Otherwise, delete any of the available VPB if its reference count is zero */
        else if (DeviceExt->IoVPB->ReferenceCount == 0)
        {
            ExFreePool(DeviceExt->IoVPB);
        }
 
        /* Remove the volume from the list */
        ExAcquireResourceExclusiveLite(&VfatGlobalData->VolumeListLock, TRUE);
        RemoveEntryList(&DeviceExt->VolumeListEntry);
        ExReleaseResourceLite(&VfatGlobalData->VolumeListLock);
 
        /* Uninitialize the notify synchronization object */
        FsRtlNotifyUninitializeSync(&DeviceExt->NotifySync);
 
        /* Release resources */
        ExFreePoolWithTag(DeviceExt->Statistics, TAG_STATS);
        ExDeleteResourceLite(&DeviceExt->DirResource);
        ExDeleteResourceLite(&DeviceExt->FatResource);
 
        /* Dismount our device if possible */
        ObDereferenceObject(DeviceExt->StorageDevice);
        IoDeleteDevice(DeviceExt->VolumeDevice);
    }
 
    return Delete;
}

Referenced by VfatCleanupFile(), VfatCloseFile(), and VfatShutdown().

VfatCleanup()

NTSTATUS VfatCleanup

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 176 of file cleanup.c.

{
    BOOLEAN Deleted;
 
    DPRINT("VfatCleanup(DeviceObject %p, Irp %p)\n", IrpContext->DeviceObject, IrpContext->Irp);
 
    if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
    {
        IrpContext->Irp->IoStatus.Information = 0;
        return STATUS_SUCCESS;
    }
 
    ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, TRUE);
    Deleted = VfatCleanupFile(IrpContext);
    if (!Deleted) ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
 
    IrpContext->Irp->IoStatus.Information = 0;
    return STATUS_SUCCESS;
}

Referenced by VfatDispatchRequest().

VfatClose()

NTSTATUS VfatClose

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 212 of file close.c.

{
    NTSTATUS Status;
 
    DPRINT("VfatClose(DeviceObject %p, Irp %p)\n", IrpContext->DeviceObject, IrpContext->Irp);
 
    if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
    {
        DPRINT("Closing file system\n");
        IrpContext->Irp->IoStatus.Information = 0;
        return STATUS_SUCCESS;
    }
    if (!ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT)))
    {
        return VfatMarkIrpContextForQueue(IrpContext);
    }
 
    Status = VfatCloseFile(IrpContext->DeviceExt, IrpContext->FileObject);
    ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
 
    IrpContext->Irp->IoStatus.Information = 0;
 
    return Status;
}

Referenced by VfatDispatchRequest().

VfatCloseFile()

NTSTATUS VfatCloseFile	(	PDEVICE_EXTENSION	DeviceExt,
		PFILE_OBJECT	FileObject
	)

Definition at line 159 of file close.c.

{
    PVFATFCB pFcb;
    PVFATCCB pCcb;
    BOOLEAN IsVolume;
    NTSTATUS Status = STATUS_SUCCESS;
 
    DPRINT("VfatCloseFile(DeviceExt %p, FileObject %p)\n",
            DeviceExt, FileObject);
 
    /* FIXME : update entry in directory? */
    pCcb = (PVFATCCB) (FileObject->FsContext2);
    pFcb = (PVFATFCB) (FileObject->FsContext);
 
    if (pFcb == NULL)
    {
        return STATUS_SUCCESS;
    }
 
    IsVolume = BooleanFlagOn(pFcb->Flags, FCB_IS_VOLUME);
 
    if (pCcb)
    {
        vfatDestroyCCB(pCcb);
    }
 
    /* If we have to close immediately, or if delaying failed, close */
    if (VfatGlobalData->ShutdownStarted || !BooleanFlagOn(pFcb->Flags, FCB_DELAYED_CLOSE) ||
        !NT_SUCCESS(VfatPostCloseFile(DeviceExt, FileObject)))
    {
        VfatCommonCloseFile(DeviceExt, pFcb);
    }
 
    FileObject->FsContext2 = NULL;
    FileObject->FsContext = NULL;
    FileObject->SectionObjectPointer = NULL;
 
#ifdef ENABLE_SWAPOUT
    if (IsVolume && DeviceExt->OpenHandleCount == 0)
    {
        VfatCheckForDismount(DeviceExt, FALSE);
    }
#endif
 
    return Status;
}

Referenced by VfatClose(), VfatCreateFile(), and vfatPrepareTargetForRename().

VfatCreate()

NTSTATUS VfatCreate

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 1070 of file create.c.

{
    NTSTATUS Status;
 
    ASSERT(IrpContext);
 
    if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
    {
        /* DeviceObject represents FileSystem instead of logical volume */
        DPRINT ("FsdCreate called with file system\n");
        IrpContext->Irp->IoStatus.Information = FILE_OPENED;
        IrpContext->PriorityBoost = IO_DISK_INCREMENT;
 
        return STATUS_SUCCESS;
    }
 
    IrpContext->Irp->IoStatus.Information = 0;
    ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, TRUE);
    Status = VfatCreateFile(IrpContext->DeviceObject, IrpContext->Irp);
    ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
 
    if (NT_SUCCESS(Status))
        IrpContext->PriorityBoost = IO_DISK_INCREMENT;
 
    return Status;
}

Referenced by VfatDispatchRequest().

VfatDelEntry()

FORCEINLINE NTSTATUS VfatDelEntry	(	PDEVICE_EXTENSION	DeviceExt,
		struct _VFATFCB *	Fcb,
		struct _VFAT_MOVE_CONTEXT *	MoveContext
	)

Definition at line 388 of file vfat.h.

{
    return DeviceExt->Dispatch.DelEntry(DeviceExt, Fcb, MoveContext);
}

Referenced by VfatCleanupFile(), VfatMoveEntry(), and vfatPrepareTargetForRename().

vfatDestroyCCB()

VOID vfatDestroyCCB

(

PVFATCCB

pCcb

)

Definition at line 257 of file fcb.c.

{
    if (pCcb->SearchPattern.Buffer)
    {
        ExFreePoolWithTag(pCcb->SearchPattern.Buffer, TAG_SEARCH);
    }
    ExFreeToNPagedLookasideList(&VfatGlobalData->CcbLookasideList, pCcb);
}

Referenced by VfatCloseFile(), and VfatMount().

vfatDestroyFCB()

VOID vfatDestroyFCB

(

PVFATFCB

pFCB

)

Definition at line 268 of file fcb.c.

{
#ifdef KDBG
    if (DebugFile.Buffer != NULL && FsRtlIsNameInExpression(&DebugFile, &pFCB->LongNameU, FALSE, NULL))
    {
        DPRINT1("Destroying: %p (%wZ) %d\n", pFCB, &pFCB->PathNameU, pFCB->RefCount);
    }
#endif
 
    FsRtlUninitializeFileLock(&pFCB->FileLock);
 
    if (!vfatFCBIsRoot(pFCB) &&
        !BooleanFlagOn(pFCB->Flags, FCB_IS_FAT) && !BooleanFlagOn(pFCB->Flags, FCB_IS_VOLUME))
    {
        RemoveEntryList(&pFCB->ParentListEntry);
    }
    ExFreePool(pFCB->PathNameBuffer);
    ExDeleteResourceLite(&pFCB->PagingIoResource);
    ExDeleteResourceLite(&pFCB->MainResource);
    ASSERT(IsListEmpty(&pFCB->ParentListHead));
    ExFreeToNPagedLookasideList(&VfatGlobalData->FcbLookasideList, pFCB);
}

Referenced by VfatCheckForDismount(), VfatDismountVolume(), VfatMount(), and vfatReleaseFCB().

VfatDirectoryControl()

NTSTATUS VfatDirectoryControl

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 727 of file dir.c.

{
    NTSTATUS Status = STATUS_SUCCESS;
 
    IrpContext->Irp->IoStatus.Information = 0;
 
    switch (IrpContext->MinorFunction)
    {
        case IRP_MN_QUERY_DIRECTORY:
            Status = DoQuery (IrpContext);
            break;
 
        case IRP_MN_NOTIFY_CHANGE_DIRECTORY:
            Status = VfatNotifyChangeDirectory(IrpContext);
            break;
 
        default:
            /* Error */
            DPRINT("Unexpected minor function %x in VFAT driver\n",
                   IrpContext->MinorFunction);
            Status = STATUS_INVALID_DEVICE_REQUEST;
            break;
    }
 
    if (Status == STATUS_PENDING && BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_COMPLETE))
    {
        return VfatMarkIrpContextForQueue(IrpContext);
    }
 
    return Status;
}

Referenced by VfatDispatchRequest().

vfatDirEntryGetFirstCluster()

ULONG vfatDirEntryGetFirstCluster	(	PDEVICE_EXTENSION	pDeviceExt,
		PDIR_ENTRY	pDirEntry
	)

Definition at line 18 of file direntry.c.

{
    ULONG cluster;
 
    if (pDeviceExt->FatInfo.FatType == FAT32)
    {
        cluster = pFatDirEntry->Fat.FirstCluster |
                 (pFatDirEntry->Fat.FirstClusterHigh << 16);
    }
    else if (vfatVolumeIsFatX(pDeviceExt))
    {
        cluster = pFatDirEntry->FatX.FirstCluster;
    }
    else
    {
        cluster = pFatDirEntry->Fat.FirstCluster;
    }
 
    return  cluster;
}

Referenced by FATDelEntry(), FATXDelEntry(), VfatGetInternalInformation(), VfatGetRetrievalPointers(), vfatInitFCBFromDirEntry(), VfatReadFileData(), VfatSetAllocationSizeInformation(), VfatWrite(), and VfatWriteFileData().

vfatDirFindFile()

NTSTATUS vfatDirFindFile	(	PDEVICE_EXTENSION	pVCB,
		PVFATFCB	parentFCB,
		PUNICODE_STRING	FileToFindU,
		PVFATFCB *	fileFCB
	)

Definition at line 790 of file fcb.c.

{
    NTSTATUS status;
    PVOID Context = NULL;
    PVOID Page = NULL;
    BOOLEAN First = TRUE;
    VFAT_DIRENTRY_CONTEXT DirContext;
    /* This buffer must have a size of 260 characters, because
    vfatMakeFCBFromDirEntry can copy 20 name entries with 13 characters. */
    WCHAR LongNameBuffer[260];
    WCHAR ShortNameBuffer[13];
    BOOLEAN FoundLong = FALSE;
    BOOLEAN FoundShort = FALSE;
    BOOLEAN IsFatX = vfatVolumeIsFatX(pDeviceExt);
 
    ASSERT(pDeviceExt);
    ASSERT(pDirectoryFCB);
    ASSERT(FileToFindU);
 
    DPRINT("vfatDirFindFile(VCB:%p, dirFCB:%p, File:%wZ)\n",
           pDeviceExt, pDirectoryFCB, FileToFindU);
    DPRINT("Dir Path:%wZ\n", &pDirectoryFCB->PathNameU);
 
    DirContext.DirIndex = 0;
    DirContext.LongNameU.Buffer = LongNameBuffer;
    DirContext.LongNameU.Length = 0;
    DirContext.LongNameU.MaximumLength = sizeof(LongNameBuffer);
    DirContext.ShortNameU.Buffer = ShortNameBuffer;
    DirContext.ShortNameU.Length = 0;
    DirContext.ShortNameU.MaximumLength = sizeof(ShortNameBuffer);
    DirContext.DeviceExt = pDeviceExt;
 
    while (TRUE)
    {
        status = VfatGetNextDirEntry(pDeviceExt,
            &Context,
            &Page,
            pDirectoryFCB,
            &DirContext,
            First);
        First = FALSE;
        if (status == STATUS_NO_MORE_ENTRIES)
        {
            return STATUS_OBJECT_NAME_NOT_FOUND;
        }
        if (!NT_SUCCESS(status))
        {
            return status;
        }
 
        DPRINT("  Index:%u  longName:%wZ\n",
               DirContext.DirIndex, &DirContext.LongNameU);
 
        if (!ENTRY_VOLUME(IsFatX, &DirContext.DirEntry))
        {
            if (DirContext.LongNameU.Length == 0 ||
                DirContext.ShortNameU.Length == 0)
            {
                DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
                if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
                {
                    ASSERT(DirContext.LongNameU.Length != 0 &&
                           DirContext.ShortNameU.Length != 0);
                }
                DirContext.DirIndex++;
                continue;
            }
            FoundLong = RtlEqualUnicodeString(FileToFindU, &DirContext.LongNameU, TRUE);
            if (FoundLong == FALSE)
            {
                FoundShort = RtlEqualUnicodeString(FileToFindU, &DirContext.ShortNameU, TRUE);
            }
            if (FoundLong || FoundShort)
            {
                status = vfatMakeFCBFromDirEntry(pDeviceExt,
                    pDirectoryFCB,
                    &DirContext,
                    pFoundFCB);
                CcUnpinData(Context);
                return status;
            }
        }
        DirContext.DirIndex++;
    }
 
    return STATUS_OBJECT_NAME_NOT_FOUND;
}

Referenced by vfatGetFCBForFile().

vfatFCBInitializeCacheFromVolume()

NTSTATUS vfatFCBInitializeCacheFromVolume	(	PVCB	vcb,
		PVFATFCB	fcb
	)

Definition at line 22 of file dirwr.c.

{
    PFILE_OBJECT fileObject;
    PVFATCCB newCCB;
    NTSTATUS status;
    BOOLEAN Acquired;
 
    /* Don't re-initialize if already done */
    if (BooleanFlagOn(fcb->Flags, FCB_CACHE_INITIALIZED))
    {
        return STATUS_SUCCESS;
    }
 
    ASSERT(vfatFCBIsDirectory(fcb));
    ASSERT(fcb->FileObject == NULL);
 
    Acquired = FALSE;
    if (!ExIsResourceAcquiredExclusive(&vcb->DirResource))
    {
        ExAcquireResourceExclusiveLite(&vcb->DirResource, TRUE);
        Acquired = TRUE;
    }
 
    fileObject = IoCreateStreamFileObject (NULL, vcb->StorageDevice);
    if (fileObject == NULL)
    {
        status = STATUS_INSUFFICIENT_RESOURCES;
        goto Quit;
    }
 
#ifdef KDBG
    if (DebugFile.Buffer != NULL && FsRtlIsNameInExpression(&DebugFile, &fcb->LongNameU, FALSE, NULL))
    {
        DPRINT1("Attaching %p to %p (%d)\n", fcb, fileObject, fcb->RefCount);
    }
#endif
 
    newCCB = ExAllocateFromNPagedLookasideList(&VfatGlobalData->CcbLookasideList);
    if (newCCB == NULL)
    {
        status = STATUS_INSUFFICIENT_RESOURCES;
        ObDereferenceObject(fileObject);
        goto Quit;
    }
    RtlZeroMemory(newCCB, sizeof (VFATCCB));
 
    fileObject->SectionObjectPointer = &fcb->SectionObjectPointers;
    fileObject->FsContext = fcb;
    fileObject->FsContext2 = newCCB;
    fileObject->Vpb = vcb->IoVPB;
    fcb->FileObject = fileObject;
 
    _SEH2_TRY
    {
        CcInitializeCacheMap(fileObject,
                             (PCC_FILE_SIZES)(&fcb->RFCB.AllocationSize),
                             TRUE,
                             &VfatGlobalData->CacheMgrCallbacks,
                             fcb);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        status = _SEH2_GetExceptionCode();
        fcb->FileObject = NULL;
        ExFreeToNPagedLookasideList(&VfatGlobalData->CcbLookasideList, newCCB);
        ObDereferenceObject(fileObject);
        if (Acquired)
        {
            ExReleaseResourceLite(&vcb->DirResource);
        }
        return status;
    }
    _SEH2_END;
 
    vfatGrabFCB(vcb, fcb);
    SetFlag(fcb->Flags, FCB_CACHE_INITIALIZED);
    status = STATUS_SUCCESS;
 
Quit:
    if (Acquired)
    {
        ExReleaseResourceLite(&vcb->DirResource);
    }
 
    return status;
}

Referenced by FATAddEntry(), FATDelEntry(), FATGetNextDirEntry(), FATIsDirectoryEmpty(), FATXDelEntry(), FATXGetNextDirEntry(), FATXIsDirectoryEmpty(), FsdSetFsLabelInformation(), vfatFindDirSpace(), vfatMakeRootFCB(), vfatRenameEntry(), and VfatUpdateEntry().

vfatFCBIsDirectory()

BOOLEAN vfatFCBIsDirectory

(

PVFATFCB

FCB

)

Definition at line 637 of file vfat.h.

{
    return BooleanFlagOn(*FCB->Attributes, FILE_ATTRIBUTE_DIRECTORY);
}

Referenced by IsThereAChildOpened(), UpdateFileSize(), VfatCleanupFile(), VfatCreateFile(), vfatFCBInitializeCacheFromVolume(), VfatFlushVolume(), vfatGetFCBForFile(), VfatGetNetworkOpenInformation(), VfatGetStandardInformation(), vfatInitFCBFromDirEntry(), VfatLockControl(), VfatLockOrUnlockVolume(), VfatMoveEntry(), VfatOpenFile(), vfatPrepareTargetForRename(), VfatRead(), VfatRenameChildFCB(), VfatSetBasicInformation(), VfatSetDispositionInformation(), VfatSetRenameInformation(), vfatUpdateFCB(), and VfatWrite().

vfatFCBIsReadOnly()

FORCEINLINE BOOLEAN vfatFCBIsReadOnly

(

PVFATFCB

FCB

)

Definition at line 644 of file vfat.h.

{
    return BooleanFlagOn(*FCB->Attributes, FILE_ATTRIBUTE_READONLY);
}

Referenced by VfatOpenFile(), vfatPrepareTargetForRename(), and VfatSetDispositionInformation().

vfatFCBIsRoot()

BOOLEAN vfatFCBIsRoot

(

PVFATFCB

FCB

)

Definition at line 293 of file fcb.c.

{
    return FCB->PathNameU.Length == sizeof(WCHAR) && FCB->PathNameU.Buffer[0] == L'\\' ? TRUE : FALSE;
}

Referenced by FATAddEntry(), FATIsDirectoryEmpty(), FATXAddEntry(), FATXGetNextDirEntry(), FindFile(), vfatDestroyFCB(), vfatFindDirSpace(), vfatInitFCBFromDirEntry(), vfatMakeFullName(), VfatOpenFile(), VfatSetDispositionInformation(), VfatSetRenameInformation(), and VfatUpdateEntry().

VfatFileSystemControl()

NTSTATUS VfatFileSystemControl

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 1378 of file fsctl.c.

{
    NTSTATUS Status;
 
    DPRINT("VfatFileSystemControl(IrpContext %p)\n", IrpContext);
 
    ASSERT(IrpContext);
    ASSERT(IrpContext->Irp);
    ASSERT(IrpContext->Stack);
 
    IrpContext->Irp->IoStatus.Information = 0;
 
    switch (IrpContext->MinorFunction)
    {
        case IRP_MN_KERNEL_CALL:
        case IRP_MN_USER_FS_REQUEST:
            switch(IrpContext->Stack->Parameters.DeviceIoControl.IoControlCode)
            {
                case FSCTL_GET_VOLUME_BITMAP:
                    Status = VfatGetVolumeBitmap(IrpContext);
                    break;
 
                case FSCTL_GET_RETRIEVAL_POINTERS:
                    Status = VfatGetRetrievalPointers(IrpContext);
                    break;
 
                case FSCTL_MOVE_FILE:
                    Status = VfatMoveFile(IrpContext);
                    break;
 
                case FSCTL_IS_VOLUME_DIRTY:
                    Status = VfatIsVolumeDirty(IrpContext);
                    break;
 
                case FSCTL_MARK_VOLUME_DIRTY:
                    Status = VfatMarkVolumeDirty(IrpContext);
                    break;
 
                case FSCTL_LOCK_VOLUME:
                    Status = VfatLockOrUnlockVolume(IrpContext, TRUE);
                    break;
 
                case FSCTL_UNLOCK_VOLUME:
                    Status = VfatLockOrUnlockVolume(IrpContext, FALSE);
                    break;
 
                case FSCTL_DISMOUNT_VOLUME:
                    Status = VfatDismountVolume(IrpContext);
                    break;
 
                case FSCTL_FILESYSTEM_GET_STATISTICS:
                    Status = VfatGetStatistics(IrpContext);
                    break;
 
                default:
                    Status = STATUS_INVALID_DEVICE_REQUEST;
            }
            break;
 
        case IRP_MN_MOUNT_VOLUME:
            Status = VfatMount(IrpContext);
            break;
 
        case IRP_MN_VERIFY_VOLUME:
            DPRINT("VFATFS: IRP_MN_VERIFY_VOLUME\n");
            Status = VfatVerify(IrpContext);
            break;
 
        default:
            DPRINT("VFAT FSC: MinorFunction %u\n", IrpContext->MinorFunction);
            Status = STATUS_INVALID_DEVICE_REQUEST;
            break;
    }
 
    return Status;
}

Referenced by VfatDispatchRequest().

vfatFindDirSpace()

BOOLEAN vfatFindDirSpace	(	PDEVICE_EXTENSION	DeviceExt,
		PVFATFCB	pDirFcb,
		ULONG	nbSlots,
		PULONG	start
	)

VfatFlush()

NTSTATUS VfatFlush

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 149 of file flush.c.

{
    NTSTATUS Status;
    PVFATFCB Fcb;
 
    /* This request is not allowed on the main device object. */
    if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
    {
        IrpContext->Irp->IoStatus.Information = 0;
        return STATUS_INVALID_DEVICE_REQUEST;
    }
 
    Fcb = (PVFATFCB)IrpContext->FileObject->FsContext;
    ASSERT(Fcb);
 
    if (BooleanFlagOn(Fcb->Flags, FCB_IS_VOLUME))
    {
        ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, TRUE);
        Status = VfatFlushVolume(IrpContext->DeviceExt, Fcb);
        ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
    }
    else
    {
        ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
        Status = VfatFlushFile(IrpContext->DeviceExt, Fcb);
        ExReleaseResourceLite (&Fcb->MainResource);
    }
 
    IrpContext->Irp->IoStatus.Information = 0;
    return Status;
}

Referenced by VfatDispatchRequest().

VfatFlushVolume()

NTSTATUS VfatFlushVolume	(	PDEVICE_EXTENSION	DeviceExt,
		PVFATFCB	VolumeFcb
	)

Definition at line 51 of file flush.c.

{
    PLIST_ENTRY ListEntry;
    PVFATFCB Fcb;
    NTSTATUS Status, ReturnStatus = STATUS_SUCCESS;
    PIRP Irp;
    KEVENT Event;
    IO_STATUS_BLOCK IoStatusBlock;
 
    DPRINT("VfatFlushVolume(DeviceExt %p, VolumeFcb %p)\n", DeviceExt, VolumeFcb);
 
    ASSERT(VolumeFcb == DeviceExt->VolumeFcb);
 
    ListEntry = DeviceExt->FcbListHead.Flink;
    while (ListEntry != &DeviceExt->FcbListHead)
    {
        Fcb = CONTAINING_RECORD(ListEntry, VFATFCB, FcbListEntry);
        ListEntry = ListEntry->Flink;
        if (!vfatFCBIsDirectory(Fcb))
        {
            ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
            Status = VfatFlushFile(DeviceExt, Fcb);
            ExReleaseResourceLite (&Fcb->MainResource);
            if (!NT_SUCCESS(Status))
            {
                DPRINT1("VfatFlushFile failed, status = %x\n", Status);
                ReturnStatus = Status;
            }
        }
        /* FIXME: Stop flushing if this is a removable media and the media was removed */
    }
 
    ListEntry = DeviceExt->FcbListHead.Flink;
    while (ListEntry != &DeviceExt->FcbListHead)
    {
        Fcb = CONTAINING_RECORD(ListEntry, VFATFCB, FcbListEntry);
        ListEntry = ListEntry->Flink;
        if (vfatFCBIsDirectory(Fcb))
        {
            ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
            Status = VfatFlushFile(DeviceExt, Fcb);
            ExReleaseResourceLite (&Fcb->MainResource);
            if (!NT_SUCCESS(Status))
            {
                DPRINT1("VfatFlushFile failed, status = %x\n", Status);
                ReturnStatus = Status;
            }
        }
        /* FIXME: Stop flushing if this is a removable media and the media was removed */
    }
 
    Fcb = (PVFATFCB) DeviceExt->FATFileObject->FsContext;
 
    ExAcquireResourceExclusiveLite(&DeviceExt->FatResource, TRUE);
    Status = VfatFlushFile(DeviceExt, Fcb);
    ExReleaseResourceLite(&DeviceExt->FatResource);
 
    /* Prepare an IRP to flush device buffers */
    Irp = IoBuildSynchronousFsdRequest(IRP_MJ_FLUSH_BUFFERS,
                                       DeviceExt->StorageDevice,
                                       NULL, 0, NULL, &Event,
                                       &IoStatusBlock);
    if (Irp != NULL)
    {
        KeInitializeEvent(&Event, NotificationEvent, FALSE);
 
        Status = IoCallDriver(DeviceExt->StorageDevice, Irp);
        if (Status == STATUS_PENDING)
        {
            KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
            Status = IoStatusBlock.Status;
        }
 
        /* Ignore device not supporting flush operation */
        if (Status == STATUS_INVALID_DEVICE_REQUEST)
        {
            DPRINT1("Flush not supported, ignored\n");
            Status = STATUS_SUCCESS;
 
        }
    }
    else
    {
        Status = STATUS_INSUFFICIENT_RESOURCES;
    }
 
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("VfatFlushFile failed, status = %x\n", Status);
        ReturnStatus = Status;
    }
 
    return ReturnStatus;
}

Referenced by VfatDismountVolume(), VfatFlush(), VfatLockOrUnlockVolume(), and VfatShutdown().

VfatGetBasicInformation()

NTSTATUS VfatGetBasicInformation	(	PFILE_OBJECT	FileObject,
		PVFATFCB	FCB,
		PDEVICE_EXTENSION	DeviceExt,
		PFILE_BASIC_INFORMATION	BasicInfo,
		PULONG	BufferLength
	)

Definition at line 280 of file finfo.c.

{
    UNREFERENCED_PARAMETER(FileObject);
 
    DPRINT("VfatGetBasicInformation()\n");
 
    if (*BufferLength < sizeof(FILE_BASIC_INFORMATION))
        return STATUS_BUFFER_OVERFLOW;
 
    RtlZeroMemory(BasicInfo, sizeof(FILE_BASIC_INFORMATION));
 
    if (vfatVolumeIsFatX(DeviceExt))
    {
        FsdDosDateTimeToSystemTime(DeviceExt,
                                   FCB->entry.FatX.CreationDate,
                                   FCB->entry.FatX.CreationTime,
                                   &BasicInfo->CreationTime);
        FsdDosDateTimeToSystemTime(DeviceExt,
                                   FCB->entry.FatX.AccessDate,
                                   FCB->entry.FatX.AccessTime,
                                   &BasicInfo->LastAccessTime);
        FsdDosDateTimeToSystemTime(DeviceExt,
                                   FCB->entry.FatX.UpdateDate,
                                   FCB->entry.FatX.UpdateTime,
                                   &BasicInfo->LastWriteTime);
        BasicInfo->ChangeTime = BasicInfo->LastWriteTime;
    }
    else
    {
        FsdDosDateTimeToSystemTime(DeviceExt,
                                   FCB->entry.Fat.CreationDate,
                                   FCB->entry.Fat.CreationTime,
                                   &BasicInfo->CreationTime);
        FsdDosDateTimeToSystemTime(DeviceExt,
                                   FCB->entry.Fat.AccessDate,
                                   0,
                                   &BasicInfo->LastAccessTime);
        FsdDosDateTimeToSystemTime(DeviceExt,
                                   FCB->entry.Fat.UpdateDate,
                                   FCB->entry.Fat.UpdateTime,
                                   &BasicInfo->LastWriteTime);
        BasicInfo->ChangeTime = BasicInfo->LastWriteTime;
    }
 
    BasicInfo->FileAttributes = *FCB->Attributes & 0x3f;
    /* Synthesize FILE_ATTRIBUTE_NORMAL */
    if (0 == (BasicInfo->FileAttributes & (FILE_ATTRIBUTE_DIRECTORY |
                                           FILE_ATTRIBUTE_ARCHIVE |
                                           FILE_ATTRIBUTE_SYSTEM |
                                           FILE_ATTRIBUTE_HIDDEN |
                                           FILE_ATTRIBUTE_READONLY)))
    {
        DPRINT("Synthesizing FILE_ATTRIBUTE_NORMAL\n");
        BasicInfo->FileAttributes |= FILE_ATTRIBUTE_NORMAL;
    }
    DPRINT("Getting attributes 0x%02x\n", BasicInfo->FileAttributes);
 
    *BufferLength -= sizeof(FILE_BASIC_INFORMATION);
    return STATUS_SUCCESS;
}

Referenced by VfatFastIoQueryBasicInfo(), VfatGetAllInformation(), and VfatQueryInformation().

vfatGetFCBForFile()

NTSTATUS vfatGetFCBForFile	(	PDEVICE_EXTENSION	pVCB,
		PVFATFCB *	pParentFCB,
		PVFATFCB *	pFCB,
		PUNICODE_STRING	pFileNameU
	)

Definition at line 883 of file fcb.c.

{
    NTSTATUS status;
    PVFATFCB FCB = NULL;
    PVFATFCB parentFCB;
    UNICODE_STRING NameU;
    UNICODE_STRING RootNameU = RTL_CONSTANT_STRING(L"\\");
    UNICODE_STRING FileNameU;
    WCHAR NameBuffer[260];
    PWCHAR curr, prev, last;
    ULONG Length;
 
    DPRINT("vfatGetFCBForFile (%p,%p,%p,%wZ)\n",
           pVCB, pParentFCB, pFCB, pFileNameU);
 
    RtlInitEmptyUnicodeString(&FileNameU, NameBuffer, sizeof(NameBuffer));
 
    parentFCB = *pParentFCB;
 
    if (parentFCB == NULL)
    {
        /* Passed-in name is the full name */
        RtlCopyUnicodeString(&FileNameU, pFileNameU);
 
        //  Trivial case, open of the root directory on volume
        if (RtlEqualUnicodeString(&FileNameU, &RootNameU, FALSE))
        {
            DPRINT("returning root FCB\n");
 
            FCB = vfatOpenRootFCB(pVCB);
            *pFCB = FCB;
            *pParentFCB = NULL;
 
            return (FCB != NULL) ? STATUS_SUCCESS : STATUS_OBJECT_PATH_NOT_FOUND;
        }
 
        /* Check for an existing FCB */
        FCB = vfatGrabFCBFromTable(pVCB, &FileNameU);
        if (FCB)
        {
            *pFCB = FCB;
            *pParentFCB = FCB->parentFcb;
            vfatGrabFCB(pVCB, *pParentFCB);
            return STATUS_SUCCESS;
        }
 
        last = curr = FileNameU.Buffer + FileNameU.Length / sizeof(WCHAR) - 1;
        while (*curr != L'\\' && curr > FileNameU.Buffer)
        {
            curr--;
        }
 
        if (curr > FileNameU.Buffer)
        {
            NameU.Buffer = FileNameU.Buffer;
            NameU.MaximumLength = NameU.Length = (curr - FileNameU.Buffer) * sizeof(WCHAR);
            FCB = vfatGrabFCBFromTable(pVCB, &NameU);
            if (FCB)
            {
                Length = (curr - FileNameU.Buffer) * sizeof(WCHAR);
                if (Length != FCB->PathNameU.Length)
                {
                    if (FileNameU.Length + FCB->PathNameU.Length - Length > FileNameU.MaximumLength)
                    {
                        vfatReleaseFCB(pVCB, FCB);
                        return STATUS_OBJECT_NAME_INVALID;
                    }
                    RtlMoveMemory(FileNameU.Buffer + FCB->PathNameU.Length / sizeof(WCHAR),
                        curr, FileNameU.Length - Length);
                    FileNameU.Length += (USHORT)(FCB->PathNameU.Length - Length);
                    curr = FileNameU.Buffer + FCB->PathNameU.Length / sizeof(WCHAR);
                    last = FileNameU.Buffer + FileNameU.Length / sizeof(WCHAR) - 1;
                }
                RtlCopyMemory(FileNameU.Buffer, FCB->PathNameU.Buffer, FCB->PathNameU.Length);
            }
        }
        else
        {
            FCB = NULL;
        }
 
        if (FCB == NULL)
        {
            FCB = vfatOpenRootFCB(pVCB);
            curr = FileNameU.Buffer;
        }
 
        parentFCB = NULL;
        prev = curr;
    }
    else
    {
        /* Make absolute path */
        RtlCopyUnicodeString(&FileNameU, &parentFCB->PathNameU);
        curr = FileNameU.Buffer + FileNameU.Length / sizeof(WCHAR) - 1;
        if (*curr != L'\\')
        {
            RtlAppendUnicodeToString(&FileNameU, L"\\");
            curr++;
        }
        ASSERT(*curr == L'\\');
        RtlAppendUnicodeStringToString(&FileNameU, pFileNameU);
 
        FCB = parentFCB;
        parentFCB = NULL;
        prev = curr;
        last = FileNameU.Buffer + FileNameU.Length / sizeof(WCHAR) - 1;
    }
 
    while (curr <= last)
    {
        if (parentFCB)
        {
            vfatReleaseFCB(pVCB, parentFCB);
            parentFCB = NULL;
        }
        //  fail if element in FCB is not a directory
        if (!vfatFCBIsDirectory(FCB))
        {
            DPRINT ("Element in requested path is not a directory\n");
 
            vfatReleaseFCB(pVCB, FCB);
            FCB = NULL;
            *pParentFCB = NULL;
            *pFCB = NULL;
 
            return  STATUS_OBJECT_PATH_NOT_FOUND;
        }
        parentFCB = FCB;
        if (prev < curr)
        {
            Length = (curr - prev) * sizeof(WCHAR);
            if (Length != parentFCB->LongNameU.Length)
            {
                if (FileNameU.Length + parentFCB->LongNameU.Length - Length > FileNameU.MaximumLength)
                {
                    vfatReleaseFCB(pVCB, parentFCB);
                    *pParentFCB = NULL;
                    *pFCB = NULL;
                    return STATUS_OBJECT_NAME_INVALID;
                }
                RtlMoveMemory(prev + parentFCB->LongNameU.Length / sizeof(WCHAR), curr,
                    FileNameU.Length - (curr - FileNameU.Buffer) * sizeof(WCHAR));
                FileNameU.Length += (USHORT)(parentFCB->LongNameU.Length - Length);
                curr = prev + parentFCB->LongNameU.Length / sizeof(WCHAR);
                last = FileNameU.Buffer + FileNameU.Length / sizeof(WCHAR) - 1;
            }
            RtlCopyMemory(prev, parentFCB->LongNameU.Buffer, parentFCB->LongNameU.Length);
        }
        curr++;
        prev = curr;
        while (*curr != L'\\' && curr <= last)
        {
            curr++;
        }
        NameU.Buffer = FileNameU.Buffer;
        NameU.Length = (curr - NameU.Buffer) * sizeof(WCHAR);
        NameU.MaximumLength = FileNameU.MaximumLength;
        DPRINT("%wZ\n", &NameU);
        FCB = vfatGrabFCBFromTable(pVCB, &NameU);
        if (FCB == NULL)
        {
            NameU.Buffer = prev;
            NameU.MaximumLength = NameU.Length = (curr - prev) * sizeof(WCHAR);
            status = vfatDirFindFile(pVCB, parentFCB, &NameU, &FCB);
            if (status == STATUS_OBJECT_NAME_NOT_FOUND)
            {
                *pFCB = NULL;
                if (curr > last)
                {
                    *pParentFCB = parentFCB;
                    return STATUS_OBJECT_NAME_NOT_FOUND;
                }
                else
                {
                    vfatReleaseFCB(pVCB, parentFCB);
                    *pParentFCB = NULL;
                    return STATUS_OBJECT_PATH_NOT_FOUND;
                }
            }
            else if (!NT_SUCCESS(status))
            {
                vfatReleaseFCB(pVCB, parentFCB);
                *pParentFCB = NULL;
                *pFCB = NULL;
 
                return status;
            }
        }
    }
 
    *pParentFCB = parentFCB;
    *pFCB = FCB;
 
    return STATUS_SUCCESS;
}

Referenced by VfatCreateFile(), VfatOpenFile(), and vfatPrepareTargetForRename().

VfatGetNextDirEntry()

FORCEINLINE NTSTATUS VfatGetNextDirEntry	(	PDEVICE_EXTENSION	DeviceExt,
		PVOID *	pContext,
		PVOID *	pPage,
		struct _VFATFCB *	pDirFcb,
		struct _VFAT_DIRENTRY_CONTEXT *	DirContext,
		BOOLEAN	First
	)

Definition at line 397 of file vfat.h.

{
    return DeviceExt->Dispatch.GetNextDirEntry(pContext, pPage, pDirFcb, DirContext, First);
}

Referenced by FindFile(), and vfatDirFindFile().

VfatGetStandardInformation()

NTSTATUS VfatGetStandardInformation	(	PVFATFCB	FCB,
		PFILE_STANDARD_INFORMATION	StandardInfo,
		PULONG	BufferLength
	)

Definition at line 73 of file finfo.c.

{
    if (*BufferLength < sizeof(FILE_STANDARD_INFORMATION))
        return STATUS_BUFFER_OVERFLOW;
 
    /* PRECONDITION */
    ASSERT(StandardInfo != NULL);
    ASSERT(FCB != NULL);
 
    if (vfatFCBIsDirectory(FCB))
    {
        StandardInfo->AllocationSize.QuadPart = 0;
        StandardInfo->EndOfFile.QuadPart = 0;
        StandardInfo->Directory = TRUE;
    }
    else
    {
        StandardInfo->AllocationSize = FCB->RFCB.AllocationSize;
        StandardInfo->EndOfFile = FCB->RFCB.FileSize;
        StandardInfo->Directory = FALSE;
    }
    StandardInfo->NumberOfLinks = 1;
    StandardInfo->DeletePending = BooleanFlagOn(FCB->Flags, FCB_DELETE_PENDING);
 
    *BufferLength -= sizeof(FILE_STANDARD_INFORMATION);
    return STATUS_SUCCESS;
}

Referenced by VfatFastIoQueryStandardInfo(), VfatGetAllInformation(), and VfatQueryInformation().

VfatGetUserBuffer()

PVOID VfatGetUserBuffer	(	IN PIRP	Irp,
		IN BOOLEAN	Paging
	)

Definition at line 443 of file misc.c.

{
    ASSERT(Irp);
 
    if (Irp->MdlAddress)
    {
        return MmGetSystemAddressForMdlSafe(Irp->MdlAddress, (Paging ? HighPagePriority : NormalPagePriority));
    }
    else
    {
        return Irp->UserBuffer;
    }
}

Referenced by DoQuery(), VfatCommonRead(), and VfatWrite().

vfatGrabFCB()

VOID vfatGrabFCB	(	PDEVICE_EXTENSION	pVCB,
		PVFATFCB	pFCB
	)

Definition at line 301 of file fcb.c.

{
#ifdef KDBG
    if (DebugFile.Buffer != NULL && FsRtlIsNameInExpression(&DebugFile, &pFCB->LongNameU, FALSE, NULL))
    {
        DPRINT1("Inc ref count (%d, oc: %d) for: %p (%wZ) at: %s(%d) %s\n", pFCB->RefCount, pFCB->OpenHandleCount, pFCB, &pFCB->PathNameU, File, Line, Func);
    }
#else
    DPRINT("Grabbing FCB at %p: %wZ, refCount:%d\n",
           pFCB, &pFCB->PathNameU, pFCB->RefCount);
#endif
 
    ASSERT(ExIsResourceAcquiredExclusive(&pVCB->DirResource));
 
    ASSERT(!BooleanFlagOn(pFCB->Flags, FCB_IS_FAT));
    ASSERT(pFCB != pVCB->VolumeFcb && !BooleanFlagOn(pFCB->Flags, FCB_IS_VOLUME));
    ASSERT(pFCB->RefCount > 0);
    ++pFCB->RefCount;
}

Referenced by vfatAddFCBToTable(), VfatCreateFile(), vfatFCBInitializeCacheFromVolume(), vfatGetFCBForFile(), vfatGrabFCBFromTable(), VfatOpenFile(), and VfatSetRenameInformation().

vfatGrabFCBFromTable()

PVFATFCB vfatGrabFCBFromTable	(	PDEVICE_EXTENSION	pDeviceExt,
		PUNICODE_STRING	pFileNameU
	)

Definition at line 594 of file fcb.c.

{
    PVFATFCB  rcFCB;
    ULONG Hash;
    UNICODE_STRING DirNameU;
    UNICODE_STRING FileNameU;
    PUNICODE_STRING FcbNameU;
 
    HASHENTRY* entry;
 
    DPRINT("'%wZ'\n", PathNameU);
 
    ASSERT(PathNameU->Length >= sizeof(WCHAR) && PathNameU->Buffer[0] == L'\\');
    Hash = vfatNameHash(0, PathNameU);
 
    entry = pVCB->FcbHashTable[Hash % pVCB->HashTableSize];
    if (entry)
    {
        vfatSplitPathName(PathNameU, &DirNameU, &FileNameU);
    }
 
    while (entry)
    {
        if (entry->Hash == Hash)
        {
            rcFCB = entry->self;
            DPRINT("'%wZ' '%wZ'\n", &DirNameU, &rcFCB->DirNameU);
            if (RtlEqualUnicodeString(&DirNameU, &rcFCB->DirNameU, TRUE))
            {
                if (rcFCB->Hash.Hash == Hash)
                {
                    FcbNameU = &rcFCB->LongNameU;
                }
                else
                {
                    FcbNameU = &rcFCB->ShortNameU;
                }
                /* compare the file name */
                DPRINT("'%wZ' '%wZ'\n", &FileNameU, FcbNameU);
                if (RtlEqualUnicodeString(&FileNameU, FcbNameU, TRUE))
                {
                    vfatGrabFCB(pVCB, rcFCB);
                    return rcFCB;
                }
            }
        }
        entry = entry->next;
    }
    return NULL;
}

Referenced by FindFile(), vfatGetFCBForFile(), and vfatOpenRootFCB().

VfatHandleDeferredWrite()

VOID NTAPI VfatHandleDeferredWrite	(	IN PVOID	IrpContext,
		IN PVOID	Unused
	)

Definition at line 220 of file misc.c.

{
    VfatDispatchRequest((PVFAT_IRP_CONTEXT)IrpContext);
}

Referenced by VfatWrite().

VfatInitFastIoRoutines()

VOID VfatInitFastIoRoutines

(

PFAST_IO_DISPATCH

FastIoDispatch

)

Definition at line 753 of file fastio.c.

{
    FastIoDispatch->SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
    FastIoDispatch->FastIoCheckIfPossible = VfatFastIoCheckIfPossible;
    FastIoDispatch->FastIoRead = VfatFastIoRead;
    FastIoDispatch->FastIoWrite = VfatFastIoWrite;
    FastIoDispatch->FastIoQueryBasicInfo = VfatFastIoQueryBasicInfo;
    FastIoDispatch->FastIoQueryStandardInfo = VfatFastIoQueryStandardInfo;
    FastIoDispatch->FastIoLock = VfatFastIoLock;
    FastIoDispatch->FastIoUnlockSingle = VfatFastIoUnlockSingle;
    FastIoDispatch->FastIoUnlockAll = VfatFastIoUnlockAll;
    FastIoDispatch->FastIoUnlockAllByKey = VfatFastIoUnlockAllByKey;
    FastIoDispatch->FastIoDeviceControl = VfatFastIoDeviceControl;
    FastIoDispatch->AcquireFileForNtCreateSection = VfatAcquireFileForNtCreateSection;
    FastIoDispatch->ReleaseFileForNtCreateSection = VfatReleaseFileForNtCreateSection;
    FastIoDispatch->FastIoDetachDevice = VfatFastIoDetachDevice;
    FastIoDispatch->FastIoQueryNetworkOpenInfo = VfatFastIoQueryNetworkOpenInfo;
    FastIoDispatch->MdlRead = VfatMdlRead;
    FastIoDispatch->MdlReadComplete = VfatMdlReadComplete;
    FastIoDispatch->PrepareMdlWrite = VfatPrepareMdlWrite;
    FastIoDispatch->MdlWriteComplete = VfatMdlWriteComplete;
    FastIoDispatch->FastIoReadCompressed = VfatFastIoReadCompressed;
    FastIoDispatch->FastIoWriteCompressed = VfatFastIoWriteCompressed;
    FastIoDispatch->MdlReadCompleteCompressed = VfatMdlReadCompleteCompressed;
    FastIoDispatch->MdlWriteCompleteCompressed = VfatMdlWriteCompleteCompressed;
    FastIoDispatch->FastIoQueryOpen = VfatFastIoQueryOpen;
    FastIoDispatch->AcquireForModWrite = VfatAcquireForModWrite;
    FastIoDispatch->ReleaseForModWrite = VfatReleaseForModWrite;
    FastIoDispatch->AcquireForCcFlush = VfatAcquireForCcFlush;
    FastIoDispatch->ReleaseForCcFlush = VfatReleaseForCcFlush;
}

Referenced by DriverEntry().

VfatIsDirectoryEmpty()

FORCEINLINE BOOLEAN VfatIsDirectoryEmpty	(	PDEVICE_EXTENSION	DeviceExt,
		struct _VFATFCB *	Fcb
	)

Definition at line 367 of file vfat.h.

{
    return DeviceExt->Dispatch.IsDirectoryEmpty(DeviceExt, Fcb);
}

Referenced by VfatCleanupFile(), and VfatSetDispositionInformation().

vfatIsLongIllegal()

BOOLEAN vfatIsLongIllegal

(

WCHAR

c

)

Definition at line 21 of file string.c.

{
    return wcschr(long_illegals, c) ? TRUE : FALSE;
}

Referenced by VfatCreateFile().

VfatLockUserBuffer()

NTSTATUS VfatLockUserBuffer	(	IN PIRP	Irp,
		IN ULONG	Length,
		IN LOCK_OPERATION	Operation
	)

Definition at line 460 of file misc.c.

{
    ASSERT(Irp);
 
    if (Irp->MdlAddress)
    {
        return STATUS_SUCCESS;
    }
 
    IoAllocateMdl(Irp->UserBuffer, Length, FALSE, FALSE, Irp);
 
    if (!Irp->MdlAddress)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    _SEH2_TRY
    {
        MmProbeAndLockPages(Irp->MdlAddress, Irp->RequestorMode, Operation);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        IoFreeMdl(Irp->MdlAddress);
        Irp->MdlAddress = NULL;
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    return STATUS_SUCCESS;
}

Referenced by DoQuery(), VfatCommonRead(), VfatRead(), and VfatWrite().

vfatMakeFCBFromDirEntry()

NTSTATUS vfatMakeFCBFromDirEntry	(	PVCB	vcb,
		PVFATFCB	directoryFCB,
		PVFAT_DIRENTRY_CONTEXT	DirContext,
		PVFATFCB *	fileFCB
	)

Definition at line 725 of file fcb.c.

{
    PVFATFCB rcFCB;
    UNICODE_STRING NameU;
    NTSTATUS Status;
 
    Status = vfatMakeFullName(directoryFCB, &DirContext->LongNameU, &DirContext->ShortNameU, &NameU);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    rcFCB = vfatNewFCB(vcb, &NameU);
    vfatInitFCBFromDirEntry(vcb, directoryFCB, rcFCB, DirContext);
 
    rcFCB->RefCount = 1;
    InsertTailList(&directoryFCB->ParentListHead, &rcFCB->ParentListEntry);
    vfatAddFCBToTable(vcb, rcFCB);
    *fileFCB = rcFCB;
 
    ExFreePoolWithTag(NameU.Buffer, TAG_FCB);
    return STATUS_SUCCESS;
}

Referenced by FATAddEntry(), FATXAddEntry(), and vfatDirFindFile().

vfatMakeRootFCB()

PVFATFCB vfatMakeRootFCB

(

PDEVICE_EXTENSION

pVCB

)

Definition at line 648 of file fcb.c.

{
    PVFATFCB FCB;
    ULONG FirstCluster, CurrentCluster, Size = 0;
    NTSTATUS Status = STATUS_SUCCESS;
    UNICODE_STRING NameU = RTL_CONSTANT_STRING(L"\\");
 
    ASSERT(pVCB->RootFcb == NULL);
 
    FCB = vfatNewFCB(pVCB, &NameU);
    if (vfatVolumeIsFatX(pVCB))
    {
        memset(FCB->entry.FatX.Filename, ' ', 42);
        FCB->entry.FatX.FileSize = pVCB->FatInfo.rootDirectorySectors * pVCB->FatInfo.BytesPerSector;
        FCB->entry.FatX.Attrib = FILE_ATTRIBUTE_DIRECTORY;
        FCB->entry.FatX.FirstCluster = 1;
        Size = pVCB->FatInfo.rootDirectorySectors * pVCB->FatInfo.BytesPerSector;
    }
    else
    {
        memset(FCB->entry.Fat.ShortName, ' ', 11);
        FCB->entry.Fat.FileSize = pVCB->FatInfo.rootDirectorySectors * pVCB->FatInfo.BytesPerSector;
        FCB->entry.Fat.Attrib = FILE_ATTRIBUTE_DIRECTORY;
        if (pVCB->FatInfo.FatType == FAT32)
        {
            CurrentCluster = FirstCluster = pVCB->FatInfo.RootCluster;
            FCB->entry.Fat.FirstCluster = (unsigned short)(FirstCluster & 0xffff);
            FCB->entry.Fat.FirstClusterHigh = (unsigned short)(FirstCluster >> 16);
 
            while (CurrentCluster != 0xffffffff && NT_SUCCESS(Status))
            {
                Size += pVCB->FatInfo.BytesPerCluster;
                Status = NextCluster (pVCB, FirstCluster, &CurrentCluster, FALSE);
            }
        }
        else
        {
            FCB->entry.Fat.FirstCluster = 1;
            Size = pVCB->FatInfo.rootDirectorySectors * pVCB->FatInfo.BytesPerSector;
        }
    }
    FCB->ShortHash.Hash = FCB->Hash.Hash;
    FCB->RefCount = 2;
    FCB->dirIndex = 0;
    FCB->RFCB.FileSize.QuadPart = Size;
    FCB->RFCB.ValidDataLength.QuadPart = Size;
    FCB->RFCB.AllocationSize.QuadPart = Size;
    FCB->RFCB.IsFastIoPossible = FastIoIsNotPossible;
 
    vfatFCBInitializeCacheFromVolume(pVCB, FCB);
    vfatAddFCBToTable(pVCB, FCB);
 
    /* Cache it */
    pVCB->RootFcb = FCB;
 
    return FCB;
}

Referenced by vfatOpenRootFCB().

VfatMarkIrpContextForQueue()

FORCEINLINE NTSTATUS VfatMarkIrpContextForQueue

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 625 of file vfat.h.

{
    PULONG Flags = &IrpContext->Flags;
 
    *Flags &= ~IRPCONTEXT_COMPLETE;
    *Flags |= IRPCONTEXT_QUEUE;
 
    return STATUS_PENDING;
}

Referenced by VfatClose(), VfatDirectoryControl(), VfatQueryInformation(), VfatQueryVolumeInformation(), VfatRead(), VfatSetInformation(), VfatSetVolumeInformation(), and VfatWrite().

VfatMoveEntry()

NTSTATUS VfatMoveEntry	(	IN PDEVICE_EXTENSION	DeviceExt,
		IN PVFATFCB	pFcb,
		IN PUNICODE_STRING	FileName,
		IN PVFATFCB	ParentFcb
	)

Definition at line 1122 of file dirwr.c.

{
    NTSTATUS Status;
    PVFATFCB OldParent;
    VFAT_MOVE_CONTEXT MoveContext;
 
    DPRINT("VfatMoveEntry(%p, %p, %wZ, %p)\n", DeviceExt, pFcb, FileName, ParentFcb);
 
    /* Delete old entry while keeping data */
    Status = VfatDelEntry(DeviceExt, pFcb, &MoveContext);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    OldParent = pFcb->parentFcb;
    CcFlushCache(&OldParent->SectionObjectPointers, NULL, 0, NULL);
    MoveContext.InPlace = (OldParent == ParentFcb);
 
    /* Add our new entry with our cluster */
    Status = VfatAddEntry(DeviceExt,
                          FileName,
                          &pFcb,
                          ParentFcb,
                          (vfatFCBIsDirectory(pFcb) ? FILE_DIRECTORY_FILE : 0),
                          *pFcb->Attributes,
                          &MoveContext);
 
    CcFlushCache(&pFcb->parentFcb->SectionObjectPointers, NULL, 0, NULL);
 
    return Status;
}

Referenced by vfatRenameEntry(), and VfatSetRenameInformation().

vfatNewFCB()

PVFATFCB vfatNewFCB	(	PDEVICE_EXTENSION	pVCB,
		PUNICODE_STRING	pFileNameU
	)

Definition at line 128 of file fcb.c.

{
    PVFATFCB  rcFCB;
 
    DPRINT("'%wZ'\n", pFileNameU);
 
    rcFCB = ExAllocateFromNPagedLookasideList(&VfatGlobalData->FcbLookasideList);
    if (rcFCB == NULL)
    {
        return NULL;
    }
    RtlZeroMemory(rcFCB, sizeof(VFATFCB));
    vfatInitFcb(rcFCB, pFileNameU);
    if (vfatVolumeIsFatX(pVCB))
        rcFCB->Attributes = &rcFCB->entry.FatX.Attrib;
    else
        rcFCB->Attributes = &rcFCB->entry.Fat.Attrib;
    rcFCB->Hash.Hash = vfatNameHash(0, &rcFCB->PathNameU);
    rcFCB->Hash.self = rcFCB;
    rcFCB->ShortHash.self = rcFCB;
    ExInitializeResourceLite(&rcFCB->PagingIoResource);
    ExInitializeResourceLite(&rcFCB->MainResource);
    FsRtlInitializeFileLock(&rcFCB->FileLock, NULL, NULL);
    ExInitializeFastMutex(&rcFCB->LastMutex);
    rcFCB->RFCB.PagingIoResource = &rcFCB->PagingIoResource;
    rcFCB->RFCB.Resource = &rcFCB->MainResource;
    rcFCB->RFCB.IsFastIoPossible = FastIoIsNotPossible;
    InitializeListHead(&rcFCB->ParentListHead);
 
    return  rcFCB;
}

Referenced by vfatMakeFCBFromDirEntry(), vfatMakeRootFCB(), and VfatMount().

vfatOpenRootFCB()

PVFATFCB vfatOpenRootFCB

(

PDEVICE_EXTENSION

pVCB

)

Definition at line 708 of file fcb.c.

{
    PVFATFCB FCB;
    UNICODE_STRING NameU = RTL_CONSTANT_STRING(L"\\");
 
    FCB = vfatGrabFCBFromTable(pVCB, &NameU);
    if (FCB == NULL)
    {
        FCB = vfatMakeRootFCB(pVCB);
    }
    ASSERT(FCB == pVCB->RootFcb);
 
    return FCB;
}

Referenced by FsdSetFsLabelInformation(), ReadVolumeLabel(), and vfatGetFCBForFile().

VfatPnp()

NTSTATUS VfatPnp

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 18 of file pnp.c.

{
    PVCB Vcb = NULL;
    NTSTATUS Status;
 
    /* PRECONDITION */
    ASSERT(IrpContext);
 
    switch (IrpContext->Stack->MinorFunction)
    {
        case IRP_MN_QUERY_REMOVE_DEVICE:
        case IRP_MN_SURPRISE_REMOVAL:
        case IRP_MN_REMOVE_DEVICE:
        case IRP_MN_CANCEL_REMOVE_DEVICE:
            Status = STATUS_NOT_IMPLEMENTED;
            break;
 
        default:
            IoSkipCurrentIrpStackLocation(IrpContext->Irp);
            Vcb = (PVCB)IrpContext->Stack->DeviceObject->DeviceExtension;
            IrpContext->Flags &= ~IRPCONTEXT_COMPLETE;
            Status = IoCallDriver(Vcb->StorageDevice, IrpContext->Irp);
    }
 
    return Status;
}

Referenced by VfatDispatchRequest().

VfatQueryInformation()

NTSTATUS VfatQueryInformation

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 1434 of file finfo.c.

{
    FILE_INFORMATION_CLASS FileInformationClass;
    PVFATFCB FCB;
 
    NTSTATUS Status = STATUS_SUCCESS;
    PVOID SystemBuffer;
    ULONG BufferLength;
 
    /* PRECONDITION */
    ASSERT(IrpContext);
 
    /* INITIALIZATION */
    FileInformationClass = IrpContext->Stack->Parameters.QueryFile.FileInformationClass;
    FCB = (PVFATFCB) IrpContext->FileObject->FsContext;
 
    DPRINT("VfatQueryInformation is called for '%s'\n",
           FileInformationClass >= FileMaximumInformation - 1 ? "????" : FileInformationClassNames[FileInformationClass]);
 
    if (FCB == NULL)
    {
        DPRINT1("IRP_MJ_QUERY_INFORMATION without FCB!\n");
        IrpContext->Irp->IoStatus.Information = 0;
        return STATUS_INVALID_PARAMETER;
    }
 
    SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
    BufferLength = IrpContext->Stack->Parameters.QueryFile.Length;
 
    if (!BooleanFlagOn(FCB->Flags, FCB_IS_PAGE_FILE))
    {
        if (!ExAcquireResourceSharedLite(&FCB->MainResource,
                                         BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT)))
        {
            return VfatMarkIrpContextForQueue(IrpContext);
        }
    }
 
    switch (FileInformationClass)
    {
        case FileStandardInformation:
            Status = VfatGetStandardInformation(FCB,
                                                SystemBuffer,
                                                &BufferLength);
            break;
 
        case FilePositionInformation:
            Status = VfatGetPositionInformation(IrpContext->FileObject,
                                                FCB,
                                                IrpContext->DeviceExt,
                                                SystemBuffer,
                                                &BufferLength);
            break;
 
        case FileBasicInformation:
            Status = VfatGetBasicInformation(IrpContext->FileObject,
                                             FCB,
                                             IrpContext->DeviceExt,
                                             SystemBuffer,
                                             &BufferLength);
            break;
 
        case FileNameInformation:
            Status = VfatGetNameInformation(IrpContext->FileObject,
                                            FCB,
                                            IrpContext->DeviceExt,
                                            SystemBuffer,
                                            &BufferLength);
            break;
 
        case FileInternalInformation:
            Status = VfatGetInternalInformation(FCB,
                                                IrpContext->DeviceExt,
                                                SystemBuffer,
                                                &BufferLength);
            break;
 
        case FileNetworkOpenInformation:
            Status = VfatGetNetworkOpenInformation(FCB,
                                                   IrpContext->DeviceExt,
                                                   SystemBuffer,
                                                   &BufferLength);
            break;
 
        case FileAllInformation:
            Status = VfatGetAllInformation(IrpContext->FileObject,
                                           FCB,
                                           IrpContext->DeviceExt,
                                           SystemBuffer,
                                           &BufferLength);
            break;
 
        case FileEaInformation:
            Status = VfatGetEaInformation(IrpContext->FileObject,
                                          FCB,
                                          IrpContext->DeviceExt,
                                          SystemBuffer,
                                          &BufferLength);
            break;
 
        case FileAlternateNameInformation:
            Status = STATUS_NOT_IMPLEMENTED;
            break;
 
        default:
            Status = STATUS_INVALID_PARAMETER;
    }
 
    if (!BooleanFlagOn(FCB->Flags, FCB_IS_PAGE_FILE))
    {
        ExReleaseResourceLite(&FCB->MainResource);
    }
 
    if (NT_SUCCESS(Status) || Status == STATUS_BUFFER_OVERFLOW)
        IrpContext->Irp->IoStatus.Information =
            IrpContext->Stack->Parameters.QueryFile.Length - BufferLength;
    else
        IrpContext->Irp->IoStatus.Information = 0;
 
    return Status;
}

Referenced by VfatDispatchRequest().

VfatQueryVolumeInformation()

NTSTATUS VfatQueryVolumeInformation

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 431 of file volume.c.

{
    FS_INFORMATION_CLASS FsInformationClass;
    NTSTATUS RC = STATUS_SUCCESS;
    PVOID SystemBuffer;
    ULONG BufferLength;
 
    /* PRECONDITION */
    ASSERT(IrpContext);
 
    DPRINT("VfatQueryVolumeInformation(IrpContext %p)\n", IrpContext);
 
    if (!ExAcquireResourceSharedLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource,
                                     BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT)))
    {
        DPRINT1("DirResource failed!\n");
        return VfatMarkIrpContextForQueue(IrpContext);
    }
 
    /* INITIALIZATION */
    FsInformationClass = IrpContext->Stack->Parameters.QueryVolume.FsInformationClass;
    BufferLength = IrpContext->Stack->Parameters.QueryVolume.Length;
    SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
 
    DPRINT("FsInformationClass %d\n", FsInformationClass);
    DPRINT("SystemBuffer %p\n", SystemBuffer);
 
    RtlZeroMemory(SystemBuffer, BufferLength);
 
    switch (FsInformationClass)
    {
        case FileFsVolumeInformation:
            RC = FsdGetFsVolumeInformation(IrpContext->DeviceObject,
                                           SystemBuffer,
                                           &BufferLength);
            break;
 
        case FileFsAttributeInformation:
            RC = FsdGetFsAttributeInformation(IrpContext->DeviceObject->DeviceExtension,
                                              SystemBuffer,
                                              &BufferLength);
            break;
 
        case FileFsSizeInformation:
            RC = FsdGetFsSizeInformation(IrpContext->DeviceObject,
                                         SystemBuffer,
                                         &BufferLength);
            break;
 
        case FileFsDeviceInformation:
            RC = FsdGetFsDeviceInformation(IrpContext->DeviceObject,
                                           SystemBuffer,
                                           &BufferLength);
            break;
 
        case FileFsFullSizeInformation:
            RC = FsdGetFsFullSizeInformation(IrpContext->DeviceObject,
                                             SystemBuffer,
                                             &BufferLength);
            break;
 
        default:
            RC = STATUS_NOT_SUPPORTED;
    }
 
    ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
 
    IrpContext->Irp->IoStatus.Information =
        IrpContext->Stack->Parameters.QueryVolume.Length - BufferLength;
 
    return RC;
}

Referenced by VfatDispatchRequest().

VfatRead()

NTSTATUS VfatRead

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 708 of file rw.c.

{
    NTSTATUS Status;
    PVFATFCB Fcb;
    ULONG Length = 0;
    PERESOURCE Resource = NULL;
    LARGE_INTEGER ByteOffset;
    ULONG BytesPerSector;
    BOOLEAN PagingIo, CanWait, IsVolume, NoCache;
 
    ASSERT(IrpContext);
 
    DPRINT("VfatRead(IrpContext %p)\n", IrpContext);
 
    ASSERT(IrpContext->DeviceObject);
 
    PagingIo = BooleanFlagOn(IrpContext->Irp->Flags, IRP_PAGING_IO);
    CanWait = BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT);
    NoCache = BooleanFlagOn(IrpContext->Irp->Flags, IRP_NOCACHE);
 
    // This request is not allowed on the main device object
    if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
    {
        DPRINT("VfatRead is called with the main device object.\n");
        Status = STATUS_INVALID_DEVICE_REQUEST;
        goto ByeBye;
    }
 
    ASSERT(IrpContext->DeviceExt);
    ASSERT(IrpContext->FileObject);
    Fcb = IrpContext->FileObject->FsContext;
    ASSERT(Fcb);
 
    IsVolume = BooleanFlagOn(Fcb->Flags, FCB_IS_VOLUME);
 
    if (BooleanFlagOn(Fcb->Flags, FCB_IS_PAGE_FILE))
    {
        PFATINFO FatInfo = &IrpContext->DeviceExt->FatInfo;
        IrpContext->Stack->Parameters.Read.ByteOffset.QuadPart += FatInfo->dataStart * FatInfo->BytesPerSector;
        IoSkipCurrentIrpStackLocation(IrpContext->Irp);
        IrpContext->Flags &= ~IRPCONTEXT_COMPLETE;
        DPRINT("Read from page file, disk offset %I64x\n", IrpContext->Stack->Parameters.Read.ByteOffset.QuadPart);
        Status = IoCallDriver(IrpContext->DeviceExt->StorageDevice, IrpContext->Irp);
        return Status;
    }
 
    DPRINT("<%wZ>\n", &Fcb->PathNameU);
 
    ByteOffset = IrpContext->Stack->Parameters.Read.ByteOffset;
    Length = IrpContext->Stack->Parameters.Read.Length;
    BytesPerSector = IrpContext->DeviceExt->FatInfo.BytesPerSector;
 
    /* fail if file is a directory and no paged read */
    if (vfatFCBIsDirectory(Fcb) && !PagingIo)
    {
        Status = STATUS_INVALID_PARAMETER;
        goto ByeBye;
    }
 
    DPRINT("'%wZ', Offset: %u, Length %u\n", &Fcb->PathNameU, ByteOffset.u.LowPart, Length);
 
    if (ByteOffset.u.HighPart && !IsVolume)
    {
       Status = STATUS_INVALID_PARAMETER;
       goto ByeBye;
    }
 
    if (Length == 0)
    {
        IrpContext->Irp->IoStatus.Information = 0;
        Status = STATUS_SUCCESS;
        goto ByeBye;
    }
 
    if (ByteOffset.QuadPart >= Fcb->RFCB.FileSize.QuadPart)
    {
       IrpContext->Irp->IoStatus.Information = 0;
       Status = STATUS_END_OF_FILE;
       goto ByeBye;
    }
 
    if (NoCache || PagingIo || IsVolume)
    {
        if (ByteOffset.u.LowPart % BytesPerSector != 0 || Length % BytesPerSector != 0)
        {
            DPRINT("%u %u\n", ByteOffset.u.LowPart, Length);
            // non cached read must be sector aligned
            Status = STATUS_INVALID_PARAMETER;
            goto ByeBye;
        }
    }
 
    if (IsVolume)
    {
        Resource = &IrpContext->DeviceExt->DirResource;
    }
    else if (PagingIo)
    {
        Resource = &Fcb->PagingIoResource;
    }
    else
    {
        Resource = &Fcb->MainResource;
    }
 
    /* Are we out of stack for the rest of the operation? */
    if (IoGetRemainingStackSize() < OVERFLOW_READ_THRESHHOLD)
    {
        /* Lock the buffer */
        Status = VfatLockUserBuffer(IrpContext->Irp, Length, IoWriteAccess);
        if (!NT_SUCCESS(Status))
        {
            return Status;
        }
 
        /* And post the read to the overflow thread */
        VfatPostRead(IrpContext, Resource, PagingIo);
 
        /* Return the appropriate status */
        return IrpContext->Irp->IoStatus.Status;
    }
 
    if (!ExAcquireResourceSharedLite(Resource, CanWait))
    {
        Resource = NULL;
        Status = STATUS_PENDING;
        goto ByeBye;
    }
 
    Status = VfatCommonRead(IrpContext);
 
ByeBye:
    if (Resource)
    {
        ExReleaseResourceLite(Resource);
    }
 
    if (Status == STATUS_PENDING)
    {
        Status = VfatLockUserBuffer(IrpContext->Irp, Length, IoWriteAccess);
        if (NT_SUCCESS(Status))
        {
            Status = VfatMarkIrpContextForQueue(IrpContext);
        }
    }
    else
    {
        IrpContext->Irp->IoStatus.Status = Status;
        if (BooleanFlagOn(IrpContext->FileObject->Flags, FO_SYNCHRONOUS_IO) &&
            !PagingIo &&
            (NT_SUCCESS(Status) || Status == STATUS_END_OF_FILE))
        {
            IrpContext->FileObject->CurrentByteOffset.QuadPart =
                ByteOffset.QuadPart + IrpContext->Irp->IoStatus.Information;
        }
 
        if (NT_SUCCESS(Status))
            IrpContext->PriorityBoost = IO_DISK_INCREMENT;
    }
    DPRINT("%x\n", Status);
    return Status;
}

Referenced by VfatDispatchRequest().

VfatReadDisk()

NTSTATUS VfatReadDisk	(	IN PDEVICE_OBJECT	pDeviceObject,
		IN PLARGE_INTEGER	ReadOffset,
		IN ULONG	ReadLength,
		IN PUCHAR	Buffer,
		IN BOOLEAN	Override
	)

VfatReadDiskPartial()

NTSTATUS VfatReadDiskPartial	(	IN PVFAT_IRP_CONTEXT	IrpContext,
		IN PLARGE_INTEGER	ReadOffset,
		IN ULONG	ReadLength,
		IN ULONG	BufferOffset,
		IN BOOLEAN	Wait
	)

vfatReleaseFCB()

VOID vfatReleaseFCB	(	PDEVICE_EXTENSION	pVCB,
		PVFATFCB	pFCB
	)

Definition at line 335 of file fcb.c.

{
    PVFATFCB tmpFcb;
 
#ifdef KDBG
    if (DebugFile.Buffer != NULL && FsRtlIsNameInExpression(&DebugFile, &pFCB->LongNameU, FALSE, NULL))
    {
        DPRINT1("Dec ref count (%d, oc: %d) for: %p (%wZ) at: %s(%d) %s\n", pFCB->RefCount, pFCB->OpenHandleCount, pFCB, &pFCB->PathNameU, File, Line, Func);
    }
#else
    DPRINT("Releasing FCB at %p: %wZ, refCount:%d\n",
           pFCB, &pFCB->PathNameU, pFCB->RefCount);
#endif
 
    ASSERT(ExIsResourceAcquiredExclusive(&pVCB->DirResource));
 
    while (pFCB)
    {
        ULONG RefCount;
 
        ASSERT(!BooleanFlagOn(pFCB->Flags, FCB_IS_FAT));
        ASSERT(pFCB != pVCB->VolumeFcb && !BooleanFlagOn(pFCB->Flags, FCB_IS_VOLUME));
        ASSERT(pFCB->RefCount > 0);
        RefCount = --pFCB->RefCount;
 
        if (RefCount == 1 && BooleanFlagOn(pFCB->Flags, FCB_CACHE_INITIALIZED))
        {
            PFILE_OBJECT tmpFileObject;
            tmpFileObject = pFCB->FileObject;
 
            pFCB->FileObject = NULL;
            CcUninitializeCacheMap(tmpFileObject, NULL, NULL);
            ClearFlag(pFCB->Flags, FCB_CACHE_INITIALIZED);
            ObDereferenceObject(tmpFileObject);
        }
 
        if (RefCount == 0)
        {
            ASSERT(pFCB->OpenHandleCount == 0);
            tmpFcb = pFCB->parentFcb;
            vfatDelFCBFromTable(pVCB, pFCB);
            vfatDestroyFCB(pFCB);
        }
        else
        {
            tmpFcb = NULL;
        }
        pFCB = tmpFcb;
    }
}

Referenced by FindFile(), FsdSetFsLabelInformation(), ReadVolumeLabel(), VfatCommonCloseFile(), VfatCreateFile(), vfatGetFCBForFile(), VfatOpenFile(), vfatPrepareTargetForRename(), vfatSetFCBNewDirName(), VfatSetRenameInformation(), and vfatUpdateFCB().

VfatReleaseFromLazyWrite()

VOID NTAPI VfatReleaseFromLazyWrite

(

IN PVOID

Context

)

Definition at line 741 of file fastio.c.

{
    PVFATFCB Fcb = (PVFATFCB)Context;
    ASSERT(Fcb);
    DPRINT("VfatReleaseFromLazyWrite(): Fcb %p\n", Fcb);
 
    ExReleaseResourceLite(&(Fcb->MainResource));
}

Referenced by DriverEntry().

vfatRenameEntry()

NTSTATUS vfatRenameEntry	(	IN PDEVICE_EXTENSION	DeviceExt,
		IN PVFATFCB	pFcb,
		IN PUNICODE_STRING	FileName,
		IN BOOLEAN	CaseChangeOnly
	)

Definition at line 178 of file dirwr.c.

{
    OEM_STRING NameA;
    ULONG StartIndex;
    PVOID Context = NULL;
    LARGE_INTEGER Offset;
    PFATX_DIR_ENTRY pDirEntry;
    NTSTATUS Status;
 
    DPRINT("vfatRenameEntry(%p, %p, %wZ, %d)\n", DeviceExt, pFcb, FileName, CaseChangeOnly);
 
    Status = vfatFCBInitializeCacheFromVolume(DeviceExt, pFcb->parentFcb);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    if (vfatVolumeIsFatX(DeviceExt))
    {
        VFAT_DIRENTRY_CONTEXT DirContext;
 
        /* Open associated dir entry */
        StartIndex = pFcb->startIndex;
        Offset.u.HighPart = 0;
        Offset.u.LowPart = (StartIndex * sizeof(FATX_DIR_ENTRY) / PAGE_SIZE) * PAGE_SIZE;
        _SEH2_TRY
        {
            CcPinRead(pFcb->parentFcb->FileObject, &Offset, PAGE_SIZE, PIN_WAIT, &Context, (PVOID*)&pDirEntry);
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            DPRINT1("CcPinRead(Offset %x:%x, Length %d) failed\n", Offset.u.HighPart, Offset.u.LowPart, PAGE_SIZE);
            _SEH2_YIELD(return _SEH2_GetExceptionCode());
        }
        _SEH2_END;
 
        pDirEntry = &pDirEntry[StartIndex % (PAGE_SIZE / sizeof(FATX_DIR_ENTRY))];
 
        /* Set file name */
        NameA.Buffer = (PCHAR)pDirEntry->Filename;
        NameA.Length = 0;
        NameA.MaximumLength = 42;
        RtlUnicodeStringToOemString(&NameA, FileName, FALSE);
        pDirEntry->FilenameLength = (unsigned char)NameA.Length;
 
        /* Update FCB */
        DirContext.DeviceExt = DeviceExt;
        DirContext.ShortNameU.Length = 0;
        DirContext.ShortNameU.MaximumLength = 0;
        DirContext.ShortNameU.Buffer = NULL;
        DirContext.LongNameU = *FileName;
        DirContext.DirEntry.FatX = *pDirEntry;
 
        CcSetDirtyPinnedData(Context, NULL);
        CcUnpinData(Context);
 
        Status = vfatUpdateFCB(DeviceExt, pFcb, &DirContext, pFcb->parentFcb);
        if (NT_SUCCESS(Status))
        {
            CcFlushCache(&pFcb->parentFcb->SectionObjectPointers, NULL, 0, NULL);
        }
 
        return Status;
    }
    else
    {
        /* This we cannot handle properly, move file - would likely need love */
        return VfatMoveEntry(DeviceExt, pFcb, FileName, pFcb->parentFcb);
    }
}

Referenced by VfatSetRenameInformation().

vfatReportChange()

VOID vfatReportChange	(	IN PDEVICE_EXTENSION	DeviceExt,
		IN PVFATFCB	Fcb,
		IN ULONG	FilterMatch,
		IN ULONG	Action
	)

Definition at line 658 of file vfat.h.

{
    FsRtlNotifyFullReportChange(DeviceExt->NotifySync,
                                &(DeviceExt->NotifyList),
                                (PSTRING)&Fcb->PathNameU,
                                Fcb->PathNameU.Length - Fcb->LongNameU.Length,
                                NULL, NULL, FilterMatch, Action, NULL);
}

Referenced by VfatCleanupFile(), VfatCreateFile(), VfatSetAllocationSizeInformation(), VfatSetBasicInformation(), VfatSetRenameInformation(), and VfatWrite().

VfatSetAllocationSizeInformation()

NTSTATUS VfatSetAllocationSizeInformation	(	PFILE_OBJECT	FileObject,
		PVFATFCB	Fcb,
		PDEVICE_EXTENSION	DeviceExt,
		PLARGE_INTEGER	AllocationSize
	)

Definition at line 1211 of file finfo.c.

{
    ULONG OldSize;
    ULONG Cluster, FirstCluster;
    NTSTATUS Status;
 
    ULONG ClusterSize = DeviceExt->FatInfo.BytesPerCluster;
    ULONG NewSize = AllocationSize->u.LowPart;
    ULONG NCluster;
    BOOLEAN AllocSizeChanged = FALSE, IsFatX = vfatVolumeIsFatX(DeviceExt);
 
    DPRINT("VfatSetAllocationSizeInformation(File <%wZ>, AllocationSize %d %u)\n",
           &Fcb->PathNameU, AllocationSize->HighPart, AllocationSize->LowPart);
 
    if (IsFatX)
        OldSize = Fcb->entry.FatX.FileSize;
    else
        OldSize = Fcb->entry.Fat.FileSize;
 
    if (AllocationSize->u.HighPart > 0)
    {
        return STATUS_INVALID_PARAMETER;
    }
 
    if (OldSize == NewSize)
    {
        return STATUS_SUCCESS;
    }
 
    FirstCluster = vfatDirEntryGetFirstCluster(DeviceExt, &Fcb->entry);
 
    if (NewSize > Fcb->RFCB.AllocationSize.u.LowPart)
    {
        AllocSizeChanged = TRUE;
        if (FirstCluster == 0)
        {
            Fcb->LastCluster = Fcb->LastOffset = 0;
            Status = NextCluster(DeviceExt, FirstCluster, &FirstCluster, TRUE);
            if (!NT_SUCCESS(Status))
            {
                DPRINT1("NextCluster failed. Status = %x\n", Status);
                return Status;
            }
 
            if (FirstCluster == 0xffffffff)
            {
                return STATUS_DISK_FULL;
            }
 
            Status = OffsetToCluster(DeviceExt, FirstCluster,
                                     ROUND_DOWN(NewSize - 1, ClusterSize),
                                     &NCluster, TRUE);
            if (NCluster == 0xffffffff || !NT_SUCCESS(Status))
            {
                /* disk is full */
                NCluster = Cluster = FirstCluster;
                Status = STATUS_SUCCESS;
                while (NT_SUCCESS(Status) && Cluster != 0xffffffff && Cluster > 1)
                {
                    Status = NextCluster(DeviceExt, FirstCluster, &NCluster, FALSE);
                    WriteCluster(DeviceExt, Cluster, 0);
                    Cluster = NCluster;
                }
                return STATUS_DISK_FULL;
            }
 
            if (IsFatX)
            {
                Fcb->entry.FatX.FirstCluster = FirstCluster;
            }
            else
            {
                if (DeviceExt->FatInfo.FatType == FAT32)
                {
                    Fcb->entry.Fat.FirstCluster = (unsigned short)(FirstCluster & 0x0000FFFF);
                    Fcb->entry.Fat.FirstClusterHigh = FirstCluster >> 16;
                }
                else
                {
                    ASSERT((FirstCluster >> 16) == 0);
                    Fcb->entry.Fat.FirstCluster = (unsigned short)(FirstCluster & 0x0000FFFF);
                }
            }
        }
        else
        {
            if (Fcb->LastCluster > 0)
            {
                if (Fcb->RFCB.AllocationSize.u.LowPart - ClusterSize == Fcb->LastOffset)
                {
                    Cluster = Fcb->LastCluster;
                    Status = STATUS_SUCCESS;
                }
                else
                {
                    Status = OffsetToCluster(DeviceExt, Fcb->LastCluster,
                                             Fcb->RFCB.AllocationSize.u.LowPart - ClusterSize - Fcb->LastOffset,
                                             &Cluster, FALSE);
                }
            }
            else
            {
                Status = OffsetToCluster(DeviceExt, FirstCluster,
                                         Fcb->RFCB.AllocationSize.u.LowPart - ClusterSize,
                                         &Cluster, FALSE);
            }
 
            if (!NT_SUCCESS(Status))
            {
                return Status;
            }
 
            Fcb->LastCluster = Cluster;
            Fcb->LastOffset = Fcb->RFCB.AllocationSize.u.LowPart - ClusterSize;
 
            /* FIXME: Check status */
            /* Cluster points now to the last cluster within the chain */
            Status = OffsetToCluster(DeviceExt, Cluster,
                                     ROUND_DOWN(NewSize - 1, ClusterSize) - Fcb->LastOffset,
                                     &NCluster, TRUE);
            if (NCluster == 0xffffffff || !NT_SUCCESS(Status))
            {
                /* disk is full */
                NCluster = Cluster;
                Status = NextCluster(DeviceExt, FirstCluster, &NCluster, FALSE);
                WriteCluster(DeviceExt, Cluster, 0xffffffff);
                Cluster = NCluster;
                while (NT_SUCCESS(Status) && Cluster != 0xffffffff && Cluster > 1)
                {
                    Status = NextCluster(DeviceExt, FirstCluster, &NCluster, FALSE);
                    WriteCluster(DeviceExt, Cluster, 0);
                    Cluster = NCluster;
                }
                return STATUS_DISK_FULL;
            }
        }
        UpdateFileSize(FileObject, Fcb, NewSize, ClusterSize, vfatVolumeIsFatX(DeviceExt));
    }
    else if (NewSize + ClusterSize <= Fcb->RFCB.AllocationSize.u.LowPart)
    {
        DPRINT("Check for the ability to set file size\n");
        if (!MmCanFileBeTruncated(FileObject->SectionObjectPointer,
                                  (PLARGE_INTEGER)AllocationSize))
        {
            DPRINT("Couldn't set file size!\n");
            return STATUS_USER_MAPPED_FILE;
        }
        DPRINT("Can set file size\n");
 
        AllocSizeChanged = TRUE;
        /* FIXME: Use the cached cluster/offset better way. */
        Fcb->LastCluster = Fcb->LastOffset = 0;
        UpdateFileSize(FileObject, Fcb, NewSize, ClusterSize, vfatVolumeIsFatX(DeviceExt));
        if (NewSize > 0)
        {
            Status = OffsetToCluster(DeviceExt, FirstCluster,
                                     ROUND_DOWN(NewSize - 1, ClusterSize),
                                     &Cluster, FALSE);
 
            NCluster = Cluster;
            Status = NextCluster(DeviceExt, FirstCluster, &NCluster, FALSE);
            WriteCluster(DeviceExt, Cluster, 0xffffffff);
            Cluster = NCluster;
        }
        else
        {
            if (IsFatX)
            {
                Fcb->entry.FatX.FirstCluster = 0;
            }
            else
            {
                if (DeviceExt->FatInfo.FatType == FAT32)
                {
                    Fcb->entry.Fat.FirstCluster = 0;
                    Fcb->entry.Fat.FirstClusterHigh = 0;
                }
                else
                {
                    Fcb->entry.Fat.FirstCluster = 0;
                }
            }
 
            NCluster = Cluster = FirstCluster;
            Status = STATUS_SUCCESS;
        }
 
        while (NT_SUCCESS(Status) && 0xffffffff != Cluster && Cluster > 1)
        {
            Status = NextCluster(DeviceExt, FirstCluster, &NCluster, FALSE);
            WriteCluster(DeviceExt, Cluster, 0);
            Cluster = NCluster;
        }
 
        if (DeviceExt->FatInfo.FatType == FAT32)
        {
            FAT32UpdateFreeClustersCount(DeviceExt);
        }
    }
    else
    {
        UpdateFileSize(FileObject, Fcb, NewSize, ClusterSize, vfatVolumeIsFatX(DeviceExt));
    }
 
    /* Update the on-disk directory entry */
    Fcb->Flags |= FCB_IS_DIRTY;
    if (AllocSizeChanged)
    {
        VfatUpdateEntry(DeviceExt, Fcb);
 
        vfatReportChange(DeviceExt, Fcb, FILE_NOTIFY_CHANGE_SIZE, FILE_ACTION_MODIFIED);
    }
    return STATUS_SUCCESS;
}

Referenced by VfatCreateFile(), vfatFindDirSpace(), VfatSetInformation(), and VfatWrite().

VfatSetExtendedAttributes()

NTSTATUS VfatSetExtendedAttributes	(	PFILE_OBJECT	FileObject,
		PVOID	Ea,
		ULONG	EaLength
	)

Definition at line 18 of file ea.c.

{
    UNREFERENCED_PARAMETER(FileObject);
    UNREFERENCED_PARAMETER(Ea);
    UNREFERENCED_PARAMETER(EaLength);
 
    return STATUS_EAS_NOT_SUPPORTED;
}

Referenced by VfatCreateFile().

vfatSetFCBNewDirName()

NTSTATUS vfatSetFCBNewDirName	(	PDEVICE_EXTENSION	pVCB,
		PVFATFCB	Fcb,
		PVFATFCB	ParentFcb
	)

Definition at line 492 of file fcb.c.

{
    NTSTATUS Status;
    UNICODE_STRING NewNameU;
 
    /* Get full path name */
    Status = vfatMakeFullName(ParentFcb, &Fcb->LongNameU, &Fcb->ShortNameU, &NewNameU);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    /* Delete old name */
    if (Fcb->PathNameBuffer)
    {
        ExFreePoolWithTag(Fcb->PathNameBuffer, TAG_FCB);
    }
    Fcb->PathNameU = NewNameU;
 
    /* Delete from table */
    vfatDelFCBFromTable(pVCB, Fcb);
 
    /* Split it properly */
    Fcb->PathNameBuffer = Fcb->PathNameU.Buffer;
    Fcb->DirNameU.Buffer = Fcb->PathNameU.Buffer;
    vfatSplitPathName(&Fcb->PathNameU, &Fcb->DirNameU, &Fcb->LongNameU);
    Fcb->Hash.Hash = vfatNameHash(0, &Fcb->PathNameU);
    if (vfatVolumeIsFatX(pVCB))
    {
        Fcb->ShortHash.Hash = Fcb->Hash.Hash;
    }
    else
    {
        Fcb->ShortHash.Hash = vfatNameHash(0, &Fcb->DirNameU);
        Fcb->ShortHash.Hash = vfatNameHash(Fcb->ShortHash.Hash, &Fcb->ShortNameU);
    }
 
    vfatAddFCBToTable(pVCB, Fcb);
    vfatReleaseFCB(pVCB, ParentFcb);
 
    return STATUS_SUCCESS;
}

Referenced by VfatRenameChildFCB().

VfatSetInformation()

NTSTATUS VfatSetInformation

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 1561 of file finfo.c.

{
    FILE_INFORMATION_CLASS FileInformationClass;
    PVFATFCB FCB;
    NTSTATUS Status = STATUS_SUCCESS;
    PVOID SystemBuffer;
    BOOLEAN LockDir;
 
    /* PRECONDITION */
    ASSERT(IrpContext);
 
    DPRINT("VfatSetInformation(IrpContext %p)\n", IrpContext);
 
    /* INITIALIZATION */
    FileInformationClass =
        IrpContext->Stack->Parameters.SetFile.FileInformationClass;
    FCB = (PVFATFCB) IrpContext->FileObject->FsContext;
    SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
 
    DPRINT("VfatSetInformation is called for '%s'\n",
           FileInformationClass >= FileMaximumInformation - 1 ? "????" : FileInformationClassNames[ FileInformationClass]);
 
    DPRINT("FileInformationClass %d\n", FileInformationClass);
    DPRINT("SystemBuffer %p\n", SystemBuffer);
 
    if (FCB == NULL)
    {
        DPRINT1("IRP_MJ_SET_INFORMATION without FCB!\n");
        IrpContext->Irp->IoStatus.Information = 0;
        return STATUS_INVALID_PARAMETER;
    }
 
    /* Special: We should call MmCanFileBeTruncated here to determine if changing
       the file size would be allowed.  If not, we bail with the right error.
       We must do this before acquiring the lock. */
    if (FileInformationClass == FileEndOfFileInformation)
    {
        DPRINT("Check for the ability to set file size\n");
        if (!MmCanFileBeTruncated(IrpContext->FileObject->SectionObjectPointer,
                                  (PLARGE_INTEGER)SystemBuffer))
        {
            DPRINT("Couldn't set file size!\n");
            IrpContext->Irp->IoStatus.Information = 0;
            return STATUS_USER_MAPPED_FILE;
        }
        DPRINT("Can set file size\n");
    }
 
    LockDir = FALSE;
    if (FileInformationClass == FileRenameInformation || FileInformationClass == FileAllocationInformation ||
        FileInformationClass == FileEndOfFileInformation || FileInformationClass == FileBasicInformation)
    {
        LockDir = TRUE;
    }
 
    if (LockDir)
    {
        if (!ExAcquireResourceExclusiveLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource,
                                            BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT)))
        {
            return VfatMarkIrpContextForQueue(IrpContext);
        }
    }
 
    if (!BooleanFlagOn(FCB->Flags, FCB_IS_PAGE_FILE))
    {
        if (!ExAcquireResourceExclusiveLite(&FCB->MainResource,
                                            BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT)))
        {
            if (LockDir)
            {
                ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
            }
 
            return VfatMarkIrpContextForQueue(IrpContext);
        }
    }
 
    switch (FileInformationClass)
    {
        case FilePositionInformation:
            Status = VfatSetPositionInformation(IrpContext->FileObject,
                                                SystemBuffer);
            break;
 
        case FileDispositionInformation:
            Status = VfatSetDispositionInformation(IrpContext->FileObject,
                                                   FCB,
                                                   IrpContext->DeviceExt,
                                                   SystemBuffer);
            break;
 
        case FileAllocationInformation:
        case FileEndOfFileInformation:
            Status = VfatSetAllocationSizeInformation(IrpContext->FileObject,
                                                      FCB,
                                                      IrpContext->DeviceExt,
                                                      (PLARGE_INTEGER)SystemBuffer);
            break;
 
        case FileBasicInformation:
            Status = VfatSetBasicInformation(IrpContext->FileObject,
                                             FCB,
                                             IrpContext->DeviceExt,
                                             SystemBuffer);
            break;
 
        case FileRenameInformation:
            Status = VfatSetRenameInformation(IrpContext->FileObject,
                                              FCB,
                                              IrpContext->DeviceExt,
                                              SystemBuffer,
                                              IrpContext->Stack->Parameters.SetFile.FileObject);
            break;
 
        default:
            Status = STATUS_NOT_SUPPORTED;
    }
 
    if (!BooleanFlagOn(FCB->Flags, FCB_IS_PAGE_FILE))
    {
        ExReleaseResourceLite(&FCB->MainResource);
    }
 
    if (LockDir)
    {
        ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
    }
 
    IrpContext->Irp->IoStatus.Information = 0;
    return Status;
}

Referenced by VfatDispatchRequest().

VfatSetVolumeInformation()

NTSTATUS VfatSetVolumeInformation

(

PVFAT_IRP_CONTEXT

IrpContext

)

Definition at line 510 of file volume.c.

{
    FS_INFORMATION_CLASS FsInformationClass;
    NTSTATUS Status = STATUS_SUCCESS;
    PVOID SystemBuffer;
    ULONG BufferLength;
    PIO_STACK_LOCATION Stack = IrpContext->Stack;
 
    /* PRECONDITION */
    ASSERT(IrpContext);
 
    DPRINT("VfatSetVolumeInformation(IrpContext %p)\n", IrpContext);
 
    if (!ExAcquireResourceExclusiveLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource,
                                        BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT)))
    {
        return VfatMarkIrpContextForQueue(IrpContext);
    }
 
    FsInformationClass = Stack->Parameters.SetVolume.FsInformationClass;
    BufferLength = Stack->Parameters.SetVolume.Length;
    SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
 
    DPRINT("FsInformationClass %d\n", FsInformationClass);
    DPRINT("BufferLength %u\n", BufferLength);
    DPRINT("SystemBuffer %p\n", SystemBuffer);
 
    switch (FsInformationClass)
    {
        case FileFsLabelInformation:
            Status = FsdSetFsLabelInformation(IrpContext->DeviceObject,
                                              SystemBuffer);
            break;
 
        default:
            Status = STATUS_NOT_SUPPORTED;
    }
 
    ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
    IrpContext->Irp->IoStatus.Information = 0;
 
    return Status;
}

Referenced by VfatDispatchRequest().

VfatShutdown()

NTSTATUS NTAPI VfatShutdown	(	PDEVICE_OBJECT	DeviceObject,
		PIRP	Irp
	)

Definition at line 50 of file shutdown.c.

{
    NTSTATUS Status;
    PLIST_ENTRY ListEntry;
    PDEVICE_EXTENSION DeviceExt;
 
    DPRINT("VfatShutdown(DeviceObject %p, Irp %p)\n",DeviceObject, Irp);
 
    FsRtlEnterFileSystem();
 
    /* FIXME: block new mount requests */
    VfatGlobalData->ShutdownStarted = TRUE;
 
    if (DeviceObject == VfatGlobalData->DeviceObject)
    {
        Irp->IoStatus.Status = STATUS_SUCCESS;
        ExAcquireResourceExclusiveLite(&VfatGlobalData->VolumeListLock, TRUE);
        ListEntry = VfatGlobalData->VolumeListHead.Flink;
        while (ListEntry != &VfatGlobalData->VolumeListHead)
        {
            DeviceExt = CONTAINING_RECORD(ListEntry, VCB, VolumeListEntry);
            ListEntry = ListEntry->Flink;
 
            ExAcquireResourceExclusiveLite(&DeviceExt->DirResource, TRUE);
 
            /* Flush volume & files */
            Status = VfatFlushVolume(DeviceExt, DeviceExt->VolumeFcb);
 
            /* We're performing a clean shutdown */
            if (BooleanFlagOn(DeviceExt->VolumeFcb->Flags, VCB_CLEAR_DIRTY) &&
                BooleanFlagOn(DeviceExt->VolumeFcb->Flags, VCB_IS_DIRTY))
            {
                /* Drop the dirty bit */
                if (NT_SUCCESS(SetDirtyStatus(DeviceExt, FALSE)))
                    DeviceExt->VolumeFcb->Flags &= ~VCB_IS_DIRTY;
            }
 
            if (NT_SUCCESS(Status))
            {
                Status = VfatDiskShutDown(DeviceExt);
                if (!NT_SUCCESS(Status))
                {
                    DPRINT1("VfatDiskShutDown failed, status = %x\n", Status);
                }
            }
            else
            {
                DPRINT1("VfatFlushVolume failed, status = %x\n", Status);
            }
            ExReleaseResourceLite(&DeviceExt->DirResource);
 
            /* Unmount the logical volume */
#ifdef ENABLE_SWAPOUT
            VfatCheckForDismount(DeviceExt, FALSE);
#endif
 
            if (!NT_SUCCESS(Status))
                Irp->IoStatus.Status = Status;
        }
        ExReleaseResourceLite(&VfatGlobalData->VolumeListLock);
 
        /* FIXME: Free all global acquired resources */
 
        Status = Irp->IoStatus.Status;
    }
    else
    {
        Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
        Status = STATUS_INVALID_DEVICE_REQUEST;
    }
 
    Irp->IoStatus.Information = 0;
    IoCompleteRequest(Irp, IO_NO_INCREMENT);
 
    FsRtlExitFileSystem();
 
    return Status;
}

vfatSplitPathName()

VOID vfatSplitPathName	(	PUNICODE_STRING	PathNameU,
		PUNICODE_STRING	DirNameU,
		PUNICODE_STRING	FileNameU
	)

Definition at line 54 of file fcb.c.

{
    PWCHAR pName;
    USHORT Length = 0;
    pName = PathNameU->Buffer + PathNameU->Length / sizeof(WCHAR) - 1;
    while (*pName != L'\\' && pName >= PathNameU->Buffer)
    {
        pName--;
        Length++;
    }
    ASSERT(*pName == L'\\' || pName < PathNameU->Buffer);
    if (FileNameU)
    {
        FileNameU->Buffer = pName + 1;
        FileNameU->Length = FileNameU->MaximumLength = Length * sizeof(WCHAR);
    }
    if (DirNameU)
    {
        DirNameU->Buffer = PathNameU->Buffer;
        DirNameU->Length = (pName + 1 - PathNameU->Buffer) * sizeof(WCHAR);
        DirNameU->MaximumLength = DirNameU->Length;
    }
}

Referenced by VfatCreateFile(), vfatGrabFCBFromTable(), vfatInitFcb(), vfatSetFCBNewDirName(), VfatSetRenameInformation(), and vfatUpdateFCB().

VfatUpdateEntry()

NTSTATUS VfatUpdateEntry	(	IN PDEVICE_EXTENSION	DeviceExt,
		PVFATFCB	pFcb
	)

vfatUpdateFCB()

NTSTATUS vfatUpdateFCB	(	PDEVICE_EXTENSION	pVCB,
		PVFATFCB	Fcb,
		PVFAT_DIRENTRY_CONTEXT	DirContext,
		PVFATFCB	ParentFcb
	)

Definition at line 539 of file fcb.c.

{
    NTSTATUS Status;
    PVFATFCB OldParent;
 
    DPRINT("vfatUpdateFCB(%p, %p, %p, %p)\n", pVCB, Fcb, DirContext, ParentFcb);
 
    /* Get full path name */
    Status = vfatMakeFullName(ParentFcb, &DirContext->LongNameU, &DirContext->ShortNameU, &Fcb->PathNameU);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    /* Delete old name */
    if (Fcb->PathNameBuffer)
    {
        ExFreePoolWithTag(Fcb->PathNameBuffer, TAG_FCB);
    }
 
    /* Delete from table */
    vfatDelFCBFromTable(pVCB, Fcb);
 
    /* Split it properly */
    Fcb->PathNameBuffer = Fcb->PathNameU.Buffer;
    Fcb->DirNameU.Buffer = Fcb->PathNameU.Buffer;
    vfatSplitPathName(&Fcb->PathNameU, &Fcb->DirNameU, &Fcb->LongNameU);
 
    /* Save old parent */
    OldParent = Fcb->parentFcb;
    RemoveEntryList(&Fcb->ParentListEntry);
 
    /* Reinit FCB */
    vfatInitFCBFromDirEntry(pVCB, ParentFcb, Fcb, DirContext);
 
    if (vfatFCBIsDirectory(Fcb))
    {
        CcFlushCache(&Fcb->SectionObjectPointers, NULL, 0, NULL);
    }
    InsertTailList(&ParentFcb->ParentListHead, &Fcb->ParentListEntry);
    vfatAddFCBToTable(pVCB, Fcb);
 
    /* If we moved across directories, dereference our old parent
     * We also dereference in case we're just renaming since AddFCBToTable references it
     */
    vfatReleaseFCB(pVCB, OldParent);
 
    return STATUS_SUCCESS;
}

Referenced by FATAddEntry(), FATXAddEntry(), and vfatRenameEntry().

vfatVolumeIsFatX()

FORCEINLINE BOOLEAN vfatVolumeIsFatX

(

PDEVICE_EXTENSION

DeviceExt

)

Definition at line 651 of file vfat.h.

{
    return BooleanFlagOn(DeviceExt->Flags, VCB_IS_FATX);
}

Referenced by FATXDelEntry(), FindFile(), FsdGetFsVolumeInformation(), FsdSetFsLabelInformation(), VfatCreateFile(), vfatDirEntryGetFirstCluster(), vfatDirFindFile(), vfatFindDirSpace(), VfatGetBasicInformation(), VfatGetFileBothInformation(), VfatGetFileDirectoryInformation(), VfatGetFileFullDirectoryInformation(), VfatGetNetworkOpenInformation(), vfatInitFCBFromDirEntry(), vfatMakeRootFCB(), VfatMount(), vfatNewFCB(), vfatRenameEntry(), VfatSetAllocationSizeInformation(), VfatSetBasicInformation(), vfatSetFCBNewDirName(), VfatUpdateEntry(), and VfatWrite().

VfatWrite()

NTSTATUS VfatWrite

(

PVFAT_IRP_CONTEXT *

pIrpContext

)

CanWait

Definition at line 873 of file rw.c.

{
    PVFAT_IRP_CONTEXT IrpContext = *pIrpContext;
    PVFATFCB Fcb;
    PERESOURCE Resource = NULL;
    LARGE_INTEGER ByteOffset;
    LARGE_INTEGER OldFileSize;
    NTSTATUS Status = STATUS_SUCCESS;
    ULONG Length = 0;
    PVOID Buffer;
    ULONG BytesPerSector;
    BOOLEAN PagingIo, CanWait, IsVolume, IsFAT, NoCache;
 
    ASSERT(IrpContext);
 
    DPRINT("VfatWrite(IrpContext %p)\n", IrpContext);
 
    ASSERT(IrpContext->DeviceObject);
 
    PagingIo = BooleanFlagOn(IrpContext->Irp->Flags, IRP_PAGING_IO);
    CanWait = BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT);
    NoCache = BooleanFlagOn(IrpContext->Irp->Flags, IRP_NOCACHE);
 
    // This request is not allowed on the main device object
    if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
    {
        DPRINT("VfatWrite is called with the main device object.\n");
        Status = STATUS_INVALID_DEVICE_REQUEST;
        goto ByeBye;
    }
 
    ASSERT(IrpContext->DeviceExt);
    ASSERT(IrpContext->FileObject);
    Fcb = IrpContext->FileObject->FsContext;
    ASSERT(Fcb);
 
    IsVolume = BooleanFlagOn(Fcb->Flags, FCB_IS_VOLUME);
    IsFAT = BooleanFlagOn(Fcb->Flags, FCB_IS_FAT);
 
    if (BooleanFlagOn(Fcb->Flags, FCB_IS_PAGE_FILE))
    {
        PFATINFO FatInfo = &IrpContext->DeviceExt->FatInfo;
        IrpContext->Stack->Parameters.Write.ByteOffset.QuadPart += FatInfo->dataStart * FatInfo->BytesPerSector;
        IoSkipCurrentIrpStackLocation(IrpContext->Irp);
        IrpContext->Flags &= ~IRPCONTEXT_COMPLETE;
        DPRINT("Write to page file, disk offset %I64x\n", IrpContext->Stack->Parameters.Write.ByteOffset.QuadPart);
        Status = IoCallDriver(IrpContext->DeviceExt->StorageDevice, IrpContext->Irp);
        return Status;
    }
 
    DPRINT("<%wZ>\n", &Fcb->PathNameU);
 
    /* fail if file is a directory and no paged read */
    if (vfatFCBIsDirectory(Fcb) && !PagingIo)
    {
        Status = STATUS_INVALID_PARAMETER;
        goto ByeBye;
    }
 
    ByteOffset = IrpContext->Stack->Parameters.Write.ByteOffset;
    if (ByteOffset.u.LowPart == FILE_WRITE_TO_END_OF_FILE &&
        ByteOffset.u.HighPart == -1)
    {
        ByteOffset.QuadPart = Fcb->RFCB.FileSize.QuadPart;
    }
    Length = IrpContext->Stack->Parameters.Write.Length;
    BytesPerSector = IrpContext->DeviceExt->FatInfo.BytesPerSector;
 
    if (ByteOffset.u.HighPart && !IsVolume)
    {
        Status = STATUS_INVALID_PARAMETER;
        goto ByeBye;
    }
 
    if (IsFAT || IsVolume ||
        vfatDirEntryGetFirstCluster(IrpContext->DeviceExt, &Fcb->entry) == 1)
    {
        if (ByteOffset.QuadPart + Length > Fcb->RFCB.FileSize.QuadPart)
        {
            // we can't extend the FAT, the volume or the root on FAT12/FAT16
            Status = STATUS_END_OF_FILE;
            goto ByeBye;
        }
    }
 
    if (PagingIo || NoCache || IsVolume)
    {
        if (ByteOffset.u.LowPart % BytesPerSector != 0 || Length % BytesPerSector != 0)
        {
            // non cached write must be sector aligned
            Status = STATUS_INVALID_PARAMETER;
            goto ByeBye;
        }
    }
 
    OldFileSize = Fcb->RFCB.FileSize;
 
    if (Length == 0)
    {
        /* Update last write time */
        IrpContext->Irp->IoStatus.Information = 0;
        Status = STATUS_SUCCESS;
        goto Metadata;
    }
 
    if (PagingIo)
    {
        if (ByteOffset.u.LowPart + Length > Fcb->RFCB.AllocationSize.u.LowPart)
        {
            Status = STATUS_INVALID_PARAMETER;
            goto ByeBye;
        }
 
        if (ByteOffset.u.LowPart + Length > ROUND_UP(Fcb->RFCB.AllocationSize.u.LowPart, BytesPerSector))
        {
            Length =  ROUND_UP(Fcb->RFCB.FileSize.u.LowPart, BytesPerSector) - ByteOffset.u.LowPart;
        }
    }
 
    if (!NoCache && !CcCanIWrite(IrpContext->FileObject, Length, CanWait,
                                 BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_DEFERRED_WRITE)))
    {
        BOOLEAN Retrying;
 
        Retrying = BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_DEFERRED_WRITE);
        SetFlag(IrpContext->Flags, IRPCONTEXT_DEFERRED_WRITE);
 
        IoMarkIrpPending(IrpContext->Irp);
        Status = STATUS_PENDING;
 
        DPRINT1("Deferring write for Irp %p, context %p!\n", IrpContext->Irp, IrpContext);
        CcDeferWrite(IrpContext->FileObject, VfatHandleDeferredWrite,
                     IrpContext, NULL, Length, Retrying);
        *pIrpContext = NULL;
 
        return Status;
    }
 
    if (IsVolume)
    {
        Resource = &IrpContext->DeviceExt->DirResource;
    }
    else if (PagingIo)
    {
        Resource = &Fcb->PagingIoResource;
    }
    else
    {
        Resource = &Fcb->MainResource;
    }
 
    if (PagingIo)
    {
        if (!ExAcquireResourceSharedLite(Resource, CanWait))
        {
            Resource = NULL;
            Status = STATUS_PENDING;
            goto ByeBye;
        }
    }
    else
    {
        if (!ExAcquireResourceExclusiveLite(Resource, CanWait))
        {
            Resource = NULL;
            Status = STATUS_PENDING;
            goto ByeBye;
        }
    }
 
    if (!PagingIo &&
        FsRtlAreThereCurrentFileLocks(&Fcb->FileLock))
    {
        if (!FsRtlCheckLockForWriteAccess(&Fcb->FileLock, IrpContext->Irp))
        {
            Status = STATUS_FILE_LOCK_CONFLICT;
            goto ByeBye;
        }
    }
 
    if (!CanWait && !IsVolume)
    {
        if (ByteOffset.u.LowPart + Length > Fcb->RFCB.AllocationSize.u.LowPart)
        {
            Status = STATUS_PENDING;
            goto ByeBye;
        }
    }
 
    Buffer = VfatGetUserBuffer(IrpContext->Irp, PagingIo);
 
    if (!IsFAT && !IsVolume && !PagingIo &&
        ByteOffset.u.LowPart + Length > Fcb->RFCB.FileSize.u.LowPart)
    {
        LARGE_INTEGER AllocationSize;
 
        if (!ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, CanWait))
        {
            Status = STATUS_PENDING;
            goto ByeBye;
        }
 
        AllocationSize.QuadPart = ByteOffset.u.LowPart + Length;
        Status = VfatSetAllocationSizeInformation(IrpContext->FileObject, Fcb,
                                                  IrpContext->DeviceExt, &AllocationSize);
 
        ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
 
        if (!NT_SUCCESS (Status))
        {
            goto ByeBye;
        }
    }
 
    if (!NoCache && !PagingIo && !IsVolume)
    {
        // cached write
 
        vfatAddToStat(IrpContext->DeviceExt, Base.UserFileWrites, 1);
        vfatAddToStat(IrpContext->DeviceExt, Base.UserFileWriteBytes, Length);
 
        _SEH2_TRY
        {
            if (IrpContext->FileObject->PrivateCacheMap == NULL)
            {
                CcInitializeCacheMap(IrpContext->FileObject,
                                     (PCC_FILE_SIZES)(&Fcb->RFCB.AllocationSize),
                                     FALSE,
                                     &VfatGlobalData->CacheMgrCallbacks,
                                     Fcb);
            }
 
            if (ByteOffset.QuadPart > OldFileSize.QuadPart)
            {
                CcZeroData(IrpContext->FileObject, &OldFileSize, &ByteOffset, TRUE);
            }
 
            if (CcCopyWrite(IrpContext->FileObject,
                            &ByteOffset,
                            Length,
                            TRUE /*CanWait*/,
                            Buffer))
            {
                IrpContext->Irp->IoStatus.Information = Length;
                Status = STATUS_SUCCESS;
            }
            else
            {
                ASSERT(FALSE );
                Status = STATUS_UNSUCCESSFUL;
            }
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            Status = _SEH2_GetExceptionCode();
        }
        _SEH2_END;
    }
    else
    {
        // non cached write
        Status = VfatLockUserBuffer(IrpContext->Irp, Length, IoReadAccess);
        if (!NT_SUCCESS(Status))
        {
            Status = STATUS_INVALID_USER_BUFFER;
            goto ByeBye;
        }
 
        if (ByteOffset.QuadPart > OldFileSize.QuadPart)
        {
            CcZeroData(IrpContext->FileObject, &OldFileSize, &ByteOffset, TRUE);
        }
 
        if (!IsVolume)
        {
            vfatAddToStat(IrpContext->DeviceExt, Fat.NonCachedWrites, 1);
            vfatAddToStat(IrpContext->DeviceExt, Fat.NonCachedWriteBytes, Length);
        }
        else
        {
            vfatAddToStat(IrpContext->DeviceExt, Base.MetaDataWrites, 1);
            vfatAddToStat(IrpContext->DeviceExt, Base.MetaDataWriteBytes, Length);
        }
 
        Status = VfatWriteFileData(IrpContext, Length, ByteOffset);
        if (NT_SUCCESS(Status))
        {
            IrpContext->Irp->IoStatus.Information = Length;
        }
    }
 
Metadata:
    if (!PagingIo && !IsFAT && !IsVolume)
    {
        if(!vfatFCBIsDirectory(Fcb))
        {
            LARGE_INTEGER SystemTime;
            ULONG Filter;
 
            // set dates and times
            KeQuerySystemTime (&SystemTime);
            if (vfatVolumeIsFatX(IrpContext->DeviceExt))
            {
                FsdSystemTimeToDosDateTime(IrpContext->DeviceExt,
                                           &SystemTime, &Fcb->entry.FatX.UpdateDate,
                                           &Fcb->entry.FatX.UpdateTime);
                Fcb->entry.FatX.AccessDate = Fcb->entry.FatX.UpdateDate;
                Fcb->entry.FatX.AccessTime = Fcb->entry.FatX.UpdateTime;
            }
            else
            {
                FsdSystemTimeToDosDateTime(IrpContext->DeviceExt,
                                           &SystemTime, &Fcb->entry.Fat.UpdateDate,
                                           &Fcb->entry.Fat.UpdateTime);
                Fcb->entry.Fat.AccessDate = Fcb->entry.Fat.UpdateDate;
            }
            /* set date and times to dirty */
            Fcb->Flags |= FCB_IS_DIRTY;
 
            /* Time to notify the OS */
            Filter = FILE_NOTIFY_CHANGE_LAST_WRITE | FILE_NOTIFY_CHANGE_ATTRIBUTES;
            if (ByteOffset.QuadPart != OldFileSize.QuadPart) Filter |= FILE_NOTIFY_CHANGE_SIZE;
 
            vfatReportChange(IrpContext->DeviceExt, Fcb, Filter, FILE_ACTION_MODIFIED);
        }
    }
 
ByeBye:
    if (Resource)
    {
        ExReleaseResourceLite(Resource);
    }
 
    if (Status == STATUS_PENDING)
    {
        Status = VfatLockUserBuffer(IrpContext->Irp, Length, IoReadAccess);
        if (NT_SUCCESS(Status))
        {
            Status = VfatMarkIrpContextForQueue(IrpContext);
        }
    }
    else
    {
        IrpContext->Irp->IoStatus.Status = Status;
        if (BooleanFlagOn(IrpContext->FileObject->Flags, FO_SYNCHRONOUS_IO) &&
            !PagingIo && NT_SUCCESS(Status))
        {
            IrpContext->FileObject->CurrentByteOffset.QuadPart =
                ByteOffset.QuadPart + IrpContext->Irp->IoStatus.Information;
        }
 
        if (NT_SUCCESS(Status))
            IrpContext->PriorityBoost = IO_DISK_INCREMENT;
    }
    DPRINT("%x\n", Status);
    return Status;
}

Referenced by VfatDispatchRequest().

VfatWriteDisk()

NTSTATUS VfatWriteDisk	(	IN PDEVICE_OBJECT	pDeviceObject,
		IN PLARGE_INTEGER	WriteOffset,
		IN ULONG	WriteLength,
		IN OUT PUCHAR	Buffer,
		IN BOOLEAN	Override
	)

Definition at line 253 of file blockdev.c.

{
    PIO_STACK_LOCATION Stack;
    PIRP Irp;
    IO_STATUS_BLOCK IoStatus;
    KEVENT Event;
    NTSTATUS Status;
 
again:
    KeInitializeEvent(&Event, NotificationEvent, FALSE);
 
    DPRINT("VfatWriteDisk(pDeviceObject %p, Offset %I64x, Length %u, Buffer %p)\n",
           pDeviceObject, WriteOffset->QuadPart, WriteLength, Buffer);
 
    DPRINT ("Building synchronous FSD Request...\n");
    Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
                                       pDeviceObject,
                                       Buffer,
                                       WriteLength,
                                       WriteOffset,
                                       &Event,
                                       &IoStatus);
    if (Irp == NULL)
    {
        DPRINT("IoBuildSynchronousFsdRequest failed\n");
        return STATUS_UNSUCCESSFUL;
    }
 
    if (Override)
    {
        Stack = IoGetNextIrpStackLocation(Irp);
        Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
    }
 
    DPRINT("Calling IO Driver... with irp %p\n", Irp);
    Status = IoCallDriver (pDeviceObject, Irp);
 
    DPRINT("Waiting for IO Operation for %p\n", Irp);
    if (Status == STATUS_PENDING)
    {
        DPRINT("Operation pending\n");
        KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
        DPRINT("Getting IO Status... for %p\n", Irp);
        Status = IoStatus.Status;
    }
 
    if (Status == STATUS_VERIFY_REQUIRED)
    {
        PDEVICE_OBJECT DeviceToVerify;
 
        DPRINT1 ("Media change detected!\n");
 
        /* Find the device to verify and reset the thread field to empty value again. */
        DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
        IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
        Status = IoVerifyVolume(DeviceToVerify,
                                FALSE);
        if (NT_SUCCESS(Status))
        {
            DPRINT1("Volume verification successful; Reissuing write request\n");
            goto again;
        }
    }
 
    if (!NT_SUCCESS(Status))
    {
        DPRINT("IO failed!!! VfatWriteDisk : Error code: %x\n", Status);
        DPRINT("(pDeviceObject %p, Offset %I64x, Size %u, Buffer %p\n",
               pDeviceObject, WriteOffset->QuadPart, WriteLength, Buffer);
        return Status;
    }
    DPRINT("Block request succeeded for %p\n", Irp);
    return STATUS_SUCCESS;
}

Referenced by FAT16SetDirtyStatus(), FAT32SetDirtyStatus(), and FAT32UpdateFreeClustersCount().

VfatWriteDiskPartial()

NTSTATUS VfatWriteDiskPartial	(	IN PVFAT_IRP_CONTEXT	IrpContext,
		IN PLARGE_INTEGER	WriteOffset,
		IN ULONG	WriteLength,
		IN ULONG	BufferOffset,
		IN BOOLEAN	Wait
	)

Definition at line 334 of file blockdev.c.

{
    PIRP Irp;
    PIO_STACK_LOCATION StackPtr;
    NTSTATUS Status;
    PVOID Buffer;
 
    DPRINT("VfatWriteDiskPartial(IrpContext %p, WriteOffset %I64x, WriteLength %u, BufferOffset %x, Wait %u)\n",
           IrpContext, WriteOffset->QuadPart, WriteLength, BufferOffset, Wait);
 
    Buffer = (PCHAR)MmGetMdlVirtualAddress(IrpContext->Irp->MdlAddress) + BufferOffset;
 
again:
    DPRINT("Building asynchronous FSD Request...\n");
    Irp = IoAllocateIrp(IrpContext->DeviceExt->StorageDevice->StackSize, TRUE);
    if (Irp == NULL)
    {
        DPRINT("IoAllocateIrp failed\n");
        return STATUS_UNSUCCESSFUL;
    }
 
    Irp->UserIosb = NULL;
    Irp->Tail.Overlay.Thread = PsGetCurrentThread();
 
    StackPtr = IoGetNextIrpStackLocation(Irp);
    StackPtr->MajorFunction = IRP_MJ_WRITE;
    StackPtr->MinorFunction = 0;
    StackPtr->Flags = 0;
    StackPtr->Control = 0;
    StackPtr->DeviceObject = IrpContext->DeviceExt->StorageDevice;
    StackPtr->FileObject = NULL;
    StackPtr->CompletionRoutine = NULL;
    StackPtr->Parameters.Read.Length = WriteLength;
    StackPtr->Parameters.Read.ByteOffset = *WriteOffset;
 
    if (!IoAllocateMdl(Buffer, WriteLength, FALSE, FALSE, Irp))
    {
        DPRINT("IoAllocateMdl failed\n");
        IoFreeIrp(Irp);
        return STATUS_UNSUCCESSFUL;
    }
 
    IoBuildPartialMdl(IrpContext->Irp->MdlAddress, Irp->MdlAddress, Buffer, WriteLength);
 
    IoSetCompletionRoutine(Irp,
                           VfatReadWritePartialCompletion,
                           IrpContext,
                           TRUE,
                           TRUE,
                           TRUE);
 
    if (Wait)
    {
        KeInitializeEvent(&IrpContext->Event, NotificationEvent, FALSE);
        IrpContext->RefCount = 1;
    }
    else
    {
        InterlockedIncrement((PLONG)&IrpContext->RefCount);
    }
 
    DPRINT("Calling IO Driver...\n");
    Status = IoCallDriver(IrpContext->DeviceExt->StorageDevice, Irp);
    if (Wait && Status == STATUS_PENDING)
    {
        KeWaitForSingleObject(&IrpContext->Event, Executive, KernelMode, FALSE, NULL);
        Status = IrpContext->Irp->IoStatus.Status;
    }
 
    if (Status == STATUS_VERIFY_REQUIRED)
    {
        PDEVICE_OBJECT DeviceToVerify;
 
        DPRINT1("Media change detected!\n");
 
        /* Find the device to verify and reset the thread field to empty value again. */
        DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
        IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
        Status = IoVerifyVolume(DeviceToVerify,
                                 FALSE);
        if (NT_SUCCESS(Status))
        {
            DPRINT1("Volume verification successful; Reissuing write request\n");
            goto again;
        }
    }
 
    return Status;
}

Referenced by VfatWriteFileData().

WriteCluster()

NTSTATUS WriteCluster	(	PDEVICE_EXTENSION	DeviceExt,
		ULONG	ClusterToWrite,
		ULONG	NewValue
	)

Definition at line 705 of file fat.c.

{
    NTSTATUS Status;
    ULONG OldValue;
 
    ExAcquireResourceExclusiveLite (&DeviceExt->FatResource, TRUE);
    Status = DeviceExt->WriteCluster(DeviceExt, ClusterToWrite, NewValue, &OldValue);
    if (DeviceExt->AvailableClustersValid)
    {
        if (OldValue && NewValue == 0)
            InterlockedIncrement((PLONG)&DeviceExt->AvailableClusters);
        else if (OldValue == 0 && NewValue)
            InterlockedDecrement((PLONG)&DeviceExt->AvailableClusters);
    }
    ExReleaseResourceLite(&DeviceExt->FatResource);
    return Status;
}

Referenced by FATDelEntry(), FATXDelEntry(), GetNextClusterExtend(), and VfatSetAllocationSizeInformation().

Variable Documentation

VfatBuildRequest

DRIVER_DISPATCH VfatBuildRequest

Definition at line 1147 of file vfat.h.

Referenced by DriverEntry().

VfatGlobalData

PVFAT_GLOBAL_DATA VfatGlobalData

extern

Definition at line 18 of file iface.c.

Referenced by DriverEntry(), FAT16GetNextCluster(), FAT32GetNextCluster(), FindFile(), GetNextCluster(), VfatAllocateIrpContext(), vfatAttachFCBToFileObject(), VfatCheckForDismount(), VfatCleanup(), VfatClose(), VfatCloseFile(), VfatCloseWorker(), VfatCommonRead(), VfatCreate(), vfatDestroyCCB(), vfatDestroyFCB(), vfatDirFindFile(), vfatFCBInitializeCacheFromVolume(), VfatFlush(), VfatFreeIrpContext(), VfatGetStatistics(), VfatLockControl(), VfatMount(), vfatNewFCB(), VfatOpenFile(), VfatPostCloseFile(), VfatRead(), VfatShutdown(), and VfatWrite().

VfatShutdown

DRIVER_DISPATCH VfatShutdown

Definition at line 1210 of file vfat.h.

Referenced by DriverEntry().