drivers/filesystems/fastfat/vfat.h

   1 #ifndef _FASTFAT_PCH_
   2 #define _FASTFAT_PCH_
   3
   4 #include <ntifs.h>
   5 #include <ntdddisk.h>
   6 #include <dos.h>
   7 #include <pseh/pseh2.h>
   8
   9 #define USE_ROS_CC_AND_FS
  10
  11 #define ROUND_DOWN(n, align) \
  12     (((ULONG)n) & ~((align) - 1l))
  13
  14 #define ROUND_UP(n, align) \
  15     ROUND_DOWN(((ULONG)n) + (align) - 1, (align))
  16
  17 #include <pshpack1.h>
  18 struct _BootSector
  19 {
  20     unsigned char  magic0, res0, magic1;
  21     unsigned char  OEMName[8];
  22     unsigned short BytesPerSector;
  23     unsigned char  SectorsPerCluster;
  24     unsigned short ReservedSectors;
  25     unsigned char  FATCount;
  26     unsigned short RootEntries, Sectors;
  27     unsigned char  Media;
  28     unsigned short FATSectors, SectorsPerTrack, Heads;
  29     unsigned long  HiddenSectors, SectorsHuge;
  30     unsigned char  Drive, Res1, Sig;
  31     unsigned long  VolumeID;
  32     unsigned char  VolumeLabel[11], SysType[8];
  33     unsigned char  Res2[448];
  34     unsigned short Signatur1;
  35 };
  36
  37 struct _BootSector32
  38 {
  39     unsigned char  magic0, res0, magic1;                        // 0
  40     unsigned char  OEMName[8];                          // 3
  41     unsigned short BytesPerSector;                      // 11
  42     unsigned char  SectorsPerCluster;                   // 13
  43     unsigned short ReservedSectors;                     // 14
  44     unsigned char  FATCount;                            // 16
  45     unsigned short RootEntries, Sectors;                        // 17
  46     unsigned char  Media;                                       // 21
  47     unsigned short FATSectors, SectorsPerTrack, Heads;  // 22
  48     unsigned long  HiddenSectors, SectorsHuge;          // 28
  49     unsigned long  FATSectors32;                                // 36
  50     unsigned short ExtFlag;                             // 40
  51     unsigned short FSVersion;                           // 42
  52     unsigned long  RootCluster;                         // 44
  53     unsigned short FSInfoSector;                                // 48
  54     unsigned short BootBackup;                          // 50
  55     unsigned char  Res3[12];                            // 52
  56     unsigned char  Drive;                                       // 64
  57     unsigned char  Res4;                                        // 65
  58     unsigned char  ExtBootSignature;                    // 66
  59     unsigned long  VolumeID;                            // 67
  60     unsigned char  VolumeLabel[11], SysType[8];         // 71
  61     unsigned char  Res2[420];                           // 90
  62     unsigned short Signature1;                          // 510
  63 };
  64
  65 struct _BootSectorFatX
  66 {
  67     unsigned char SysType[4];        // 0
  68     unsigned long VolumeID;          // 4
  69     unsigned long SectorsPerCluster; // 8
  70     unsigned short FATCount;         // 12
  71     unsigned long Unknown;           // 14
  72     unsigned char Unused[4078];      // 18
  73 };
  74
  75 struct _FsInfoSector
  76 {
  77     unsigned long  ExtBootSignature2;                   // 0
  78     unsigned char  Res6[480];                           // 4
  79     unsigned long  FSINFOSignature;                     // 484
  80     unsigned long  FreeCluster;                         // 488
  81     unsigned long  NextCluster;                         // 492
  82     unsigned char  Res7[12];                            // 496
  83     unsigned long  Signatur2;                           // 508
  84 };
  85
  86 typedef struct _BootSector BootSector;
  87
  88 struct _FATDirEntry
  89 {
  90     union
  91     {
  92         struct { unsigned char Filename[8], Ext[3]; };
  93         unsigned char ShortName[11];
  94     };
  95     unsigned char  Attrib;
  96     unsigned char  lCase;
  97     unsigned char  CreationTimeMs;
  98     unsigned short CreationTime,CreationDate,AccessDate;
  99     union
 100     {
 101         unsigned short FirstClusterHigh; // FAT32
 102         unsigned short ExtendedAttributes; // FAT12/FAT16
 103     };
 104     unsigned short UpdateTime;                            //time create/update
 105     unsigned short UpdateDate;                            //date create/update
 106     unsigned short FirstCluster;
 107     unsigned long  FileSize;
 108 };
 109
 110 #define FAT_EAFILE  "EA DATA. SF"
 111
 112 typedef struct _EAFileHeader FAT_EA_FILE_HEADER, *PFAT_EA_FILE_HEADER;
 113
 114 struct _EAFileHeader
 115 {
 116     unsigned short Signature; // ED
 117     unsigned short Unknown[15];
 118     unsigned short EASetTable[240];
 119 };
 120
 121 typedef struct _EASetHeader FAT_EA_SET_HEADER, *PFAT_EA_SET_HEADER;
 122
 123 struct _EASetHeader
 124 {
 125     unsigned short Signature; // EA
 126     unsigned short Offset; // relative offset, same value as in the EASetTable
 127     unsigned short Unknown1[2];
 128     char TargetFileName[12];
 129     unsigned short Unknown2[3];
 130     unsigned int EALength;
 131     // EA Header
 132 };
 133
 134 typedef struct _EAHeader FAT_EA_HEADER, *PFAT_EA_HEADER;
 135
 136 struct _EAHeader
 137 {
 138     unsigned char Unknown;
 139     unsigned char EANameLength;
 140     unsigned short EAValueLength;
 141     // Name Data
 142     // Value Data
 143 };
 144
 145 typedef struct _FATDirEntry FAT_DIR_ENTRY, *PFAT_DIR_ENTRY;
 146
 147 struct _FATXDirEntry
 148 {
 149     unsigned char FilenameLength; // 0
 150     unsigned char Attrib;         // 1
 151     unsigned char Filename[42];   // 2
 152     unsigned long FirstCluster;   // 44
 153     unsigned long FileSize;       // 48
 154     unsigned short UpdateTime;    // 52
 155     unsigned short UpdateDate;    // 54
 156     unsigned short CreationTime;  // 56
 157     unsigned short CreationDate;  // 58
 158     unsigned short AccessTime;    // 60
 159     unsigned short AccessDate;    // 62
 160 };
 161
 162 struct _slot
 163 {
 164     unsigned char id;               // sequence number for slot
 165     WCHAR  name0_4[5];              // first 5 characters in name
 166     unsigned char attr;             // attribute byte
 167     unsigned char reserved;         // always 0
 168     unsigned char alias_checksum;   // checksum for 8.3 alias
 169     WCHAR  name5_10[6];             // 6 more characters in name
 170     unsigned char start[2];         // starting cluster number
 171     WCHAR  name11_12[2];            // last 2 characters in name
 172 };
 173
 174 typedef struct _slot slot;
 175
 176 #include <poppack.h>
 177
 178 #define VFAT_CASE_LOWER_BASE    8               // base is lower case
 179 #define VFAT_CASE_LOWER_EXT     16              // extension is lower case
 180
 181 #define LONGNAME_MAX_LENGTH     256             // max length for a long filename
 182
 183 #define ENTRY_DELETED(DeviceExt, DirEntry) ((DeviceExt)->Flags & VCB_IS_FATX ? FATX_ENTRY_DELETED(&((DirEntry)->FatX)) : FAT_ENTRY_DELETED(&((DirEntry)->Fat)))
 184 #define ENTRY_VOLUME(DeviceExt, DirEntry)  ((DeviceExt)->Flags & VCB_IS_FATX ? FATX_ENTRY_VOLUME(&((DirEntry)->FatX)) : FAT_ENTRY_VOLUME(&((DirEntry)->Fat)))
 185 #define ENTRY_END(DeviceExt, DirEntry)     ((DeviceExt)->Flags & VCB_IS_FATX ? FATX_ENTRY_END(&((DirEntry)->FatX)) : FAT_ENTRY_END(&((DirEntry)->Fat)))
 186
 187 #define FAT_ENTRY_DELETED(DirEntry)  ((DirEntry)->Filename[0] == 0xe5)
 188 #define FAT_ENTRY_END(DirEntry)      ((DirEntry)->Filename[0] == 0)
 189 #define FAT_ENTRY_LONG(DirEntry)     (((DirEntry)->Attrib & 0x3f) == 0x0f)
 190 #define FAT_ENTRY_VOLUME(DirEntry)   (((DirEntry)->Attrib & 0x1f) == 0x08)
 191
 192 #define FATX_ENTRY_DELETED(DirEntry) ((DirEntry)->FilenameLength == 0xe5)
 193 #define FATX_ENTRY_END(DirEntry)     ((DirEntry)->FilenameLength == 0xff)
 194 #define FATX_ENTRY_LONG(DirEntry)    (FALSE)
 195 #define FATX_ENTRY_VOLUME(DirEntry)  (((DirEntry)->Attrib & 0x1f) == 0x08)
 196
 197 #define FAT_ENTRIES_PER_PAGE   (PAGE_SIZE / sizeof (FAT_DIR_ENTRY))
 198 #define FATX_ENTRIES_PER_PAGE  (PAGE_SIZE / sizeof (FATX_DIR_ENTRY))
 199
 200 typedef struct _FATXDirEntry FATX_DIR_ENTRY, *PFATX_DIR_ENTRY;
 201
 202 union _DIR_ENTRY
 203 {
 204     FAT_DIR_ENTRY Fat;
 205     FATX_DIR_ENTRY FatX;
 206 };
 207
 208 typedef union _DIR_ENTRY DIR_ENTRY, *PDIR_ENTRY;
 209
 210 #define BLOCKSIZE 512
 211
 212 #define FAT16  (1)
 213 #define FAT12  (2)
 214 #define FAT32  (3)
 215 #define FATX16 (4)
 216 #define FATX32 (5)
 217
 218 #define VCB_VOLUME_LOCKED       0x0001
 219 #define VCB_DISMOUNT_PENDING    0x0002
 220 #define VCB_IS_FATX             0x0004
 221 #define VCB_IS_DIRTY            0x4000 /* Volume is dirty */
 222 #define VCB_CLEAR_DIRTY         0x8000 /* Clean dirty flag at shutdown */
 223
 224 typedef struct
 225 {
 226     ULONG VolumeID;
 227     ULONG FATStart;
 228     ULONG FATCount;
 229     ULONG FATSectors;
 230     ULONG rootDirectorySectors;
 231     ULONG rootStart;
 232     ULONG dataStart;
 233     ULONG RootCluster;
 234     ULONG SectorsPerCluster;
 235     ULONG BytesPerSector;
 236     ULONG BytesPerCluster;
 237     ULONG NumberOfClusters;
 238     ULONG FatType;
 239     ULONG Sectors;
 240     BOOLEAN FixedMedia;
 241 } FATINFO, *PFATINFO;
 242
 243 struct _VFATFCB;
 244 struct _VFAT_DIRENTRY_CONTEXT;
 245
 246 typedef struct _HASHENTRY
 247 {
 248     ULONG Hash;
 249     struct _VFATFCB* self;
 250     struct _HASHENTRY* next;
 251 }
 252 HASHENTRY;
 253
 254 #define FCB_HASH_TABLE_SIZE 65536
 255
 256 typedef struct DEVICE_EXTENSION *PDEVICE_EXTENSION;
 257
 258 typedef NTSTATUS (*PGET_NEXT_CLUSTER)(PDEVICE_EXTENSION,ULONG,PULONG);
 259 typedef NTSTATUS (*PFIND_AND_MARK_AVAILABLE_CLUSTER)(PDEVICE_EXTENSION,PULONG);
 260 typedef NTSTATUS (*PWRITE_CLUSTER)(PDEVICE_EXTENSION,ULONG,ULONG,PULONG);
 261
 262 typedef NTSTATUS (*PGET_NEXT_DIR_ENTRY)(PVOID*,PVOID*,struct _VFATFCB*,struct _VFAT_DIRENTRY_CONTEXT*,BOOLEAN);
 263
 264 typedef struct DEVICE_EXTENSION
 265 {
 266     ERESOURCE DirResource;
 267     ERESOURCE FatResource;
 268
 269     KSPIN_LOCK FcbListLock;
 270     LIST_ENTRY FcbListHead;
 271     ULONG HashTableSize;
 272     struct _HASHENTRY **FcbHashTable;
 273
 274     PDEVICE_OBJECT StorageDevice;
 275     PFILE_OBJECT FATFileObject;
 276     FATINFO FatInfo;
 277     ULONG LastAvailableCluster;
 278     ULONG AvailableClusters;
 279     BOOLEAN AvailableClustersValid;
 280     ULONG Flags;
 281     struct _VFATFCB *VolumeFcb;
 282
 283     /* Pointers to functions for manipulating FAT. */
 284     PGET_NEXT_CLUSTER GetNextCluster;
 285     PFIND_AND_MARK_AVAILABLE_CLUSTER FindAndMarkAvailableCluster;
 286     PWRITE_CLUSTER WriteCluster;
 287     ULONG CleanShutBitMask;
 288
 289     /* Pointers to functions for manipulating directory entries. */
 290     PGET_NEXT_DIR_ENTRY GetNextDirEntry;
 291
 292     ULONG BaseDateYear;
 293
 294     LIST_ENTRY VolumeListEntry;
 295
 296     /* Notifications */
 297     LIST_ENTRY NotifyList;
 298     PNOTIFY_SYNC NotifySync;
 299 } DEVICE_EXTENSION, VCB, *PVCB;
 300
 301 typedef struct
 302 {
 303     PDRIVER_OBJECT DriverObject;
 304     PDEVICE_OBJECT DeviceObject;
 305     ULONG Flags;
 306     ERESOURCE VolumeListLock;
 307     LIST_ENTRY VolumeListHead;
 308     NPAGED_LOOKASIDE_LIST FcbLookasideList;
 309     NPAGED_LOOKASIDE_LIST CcbLookasideList;
 310     NPAGED_LOOKASIDE_LIST IrpContextLookasideList;
 311     FAST_IO_DISPATCH FastIoDispatch;
 312     CACHE_MANAGER_CALLBACKS CacheMgrCallbacks;
 313 } VFAT_GLOBAL_DATA, *PVFAT_GLOBAL_DATA;
 314
 315 extern PVFAT_GLOBAL_DATA VfatGlobalData;
 316
 317 #define FCB_CACHE_INITIALIZED   0x0001
 318 #define FCB_DELETE_PENDING      0x0002
 319 #define FCB_IS_FAT              0x0004
 320 #define FCB_IS_PAGE_FILE        0x0008
 321 #define FCB_IS_VOLUME           0x0010
 322 #define FCB_IS_DIRTY            0x0020
 323 #define FCB_IS_FATX_ENTRY       0x0040
 324
 325 typedef struct _VFATFCB
 326 {
 327     /* FCB header required by ROS/NT */
 328     FSRTL_COMMON_FCB_HEADER RFCB;
 329     SECTION_OBJECT_POINTERS SectionObjectPointers;
 330     ERESOURCE MainResource;
 331     ERESOURCE PagingIoResource;
 332     /* end FCB header required by ROS/NT */
 333
 334     /* directory entry for this file or directory */
 335     DIR_ENTRY entry;
 336
 337     /* Pointer to attributes in entry */
 338     PUCHAR Attributes;
 339
 340     /* long file name, points into PathNameBuffer */
 341     UNICODE_STRING LongNameU;
 342
 343     /* short file name */
 344     UNICODE_STRING ShortNameU;
 345
 346     /* directory name, points into PathNameBuffer */
 347     UNICODE_STRING DirNameU;
 348
 349     /* path + long file name 260 max*/
 350     UNICODE_STRING PathNameU;
 351
 352     /* buffer for PathNameU */
 353     PWCHAR PathNameBuffer;
 354
 355     /* buffer for ShortNameU */
 356     WCHAR ShortNameBuffer[13];
 357
 358     /* */
 359     LONG RefCount;
 360
 361     /* List of FCB's for this volume */
 362     LIST_ENTRY FcbListEntry;
 363
 364     /* pointer to the parent fcb */
 365     struct _VFATFCB *parentFcb;
 366
 367     /* Flags for the fcb */
 368     ULONG Flags;
 369
 370     /* pointer to the file object which has initialized the fcb */
 371     PFILE_OBJECT FileObject;
 372
 373     /* Directory index for the short name entry */
 374     ULONG dirIndex;
 375
 376     /* Directory index where the long name starts */
 377     ULONG startIndex;
 378
 379     /* Share access for the file object */
 380     SHARE_ACCESS FCBShareAccess;
 381
 382     /* Incremented on IRP_MJ_CREATE, decremented on IRP_MJ_CLEANUP */
 383     ULONG OpenHandleCount;
 384
 385     /* Entry into the hash table for the path + long name */
 386     HASHENTRY Hash;
 387
 388     /* Entry into the hash table for the path + short name */
 389     HASHENTRY ShortHash;
 390
 391     /* List of byte-range locks for this file */
 392     FILE_LOCK FileLock;
 393
 394     /*
 395      * Optimalization: caching of last read/write cluster+offset pair. Can't
 396      * be in VFATCCB because it must be reset everytime the allocated clusters
 397      * change.
 398      */
 399     FAST_MUTEX LastMutex;
 400     ULONG LastCluster;
 401     ULONG LastOffset;
 402 } VFATFCB, *PVFATFCB;
 403
 404 typedef struct _VFATCCB
 405 {
 406     LARGE_INTEGER  CurrentByteOffset;
 407     /* for DirectoryControl */
 408     ULONG Entry;
 409     /* for DirectoryControl */
 410     UNICODE_STRING SearchPattern;
 411 } VFATCCB, *PVFATCCB;
 412
 413 #define TAG_CCB  'BCCV'
 414 #define TAG_FCB  'BCFV'
 415 #define TAG_IRP  'PRIV'
 416 #define TAG_VFAT 'TAFV'
 417
 418 #define ENTRIES_PER_SECTOR (BLOCKSIZE / sizeof(FATDirEntry))
 419
 420 typedef struct __DOSTIME
 421 {
 422     USHORT Second:5;
 423     USHORT Minute:6;
 424     USHORT Hour:5;
 425 }
 426 DOSTIME, *PDOSTIME;
 427
 428 typedef struct __DOSDATE
 429 {
 430     USHORT Day:5;
 431     USHORT Month:4;
 432     USHORT Year:7;
 433 }
 434 DOSDATE, *PDOSDATE;
 435
 436 #define IRPCONTEXT_CANWAIT          0x0001
 437 #define IRPCONTEXT_PENDINGRETURNED  0x0002
 438
 439 typedef struct
 440 {
 441     PIRP Irp;
 442     PDEVICE_OBJECT DeviceObject;
 443     PDEVICE_EXTENSION DeviceExt;
 444     ULONG Flags;
 445     WORK_QUEUE_ITEM WorkQueueItem;
 446     PIO_STACK_LOCATION Stack;
 447     UCHAR MajorFunction;
 448     UCHAR MinorFunction;
 449     PFILE_OBJECT FileObject;
 450     ULONG RefCount;
 451     KEVENT Event;
 452 } VFAT_IRP_CONTEXT, *PVFAT_IRP_CONTEXT;
 453
 454 typedef struct _VFAT_DIRENTRY_CONTEXT
 455 {
 456     ULONG StartIndex;
 457     ULONG DirIndex;
 458     DIR_ENTRY DirEntry;
 459     UNICODE_STRING LongNameU;
 460     UNICODE_STRING ShortNameU;
 461 } VFAT_DIRENTRY_CONTEXT, *PVFAT_DIRENTRY_CONTEXT;
 462
 463
 464 /* blockdev.c */
 465
 466 NTSTATUS
 467 VfatReadDisk(
 468     IN PDEVICE_OBJECT pDeviceObject,
 469     IN PLARGE_INTEGER ReadOffset,
 470     IN ULONG ReadLength,
 471     IN PUCHAR Buffer,
 472     IN BOOLEAN Override);
 473
 474 NTSTATUS
 475 VfatReadDiskPartial(
 476     IN PVFAT_IRP_CONTEXT IrpContext,
 477     IN PLARGE_INTEGER ReadOffset,
 478     IN ULONG ReadLength,
 479     IN ULONG BufferOffset,
 480     IN BOOLEAN Wait);
 481
 482 NTSTATUS
 483 VfatWriteDiskPartial(
 484     IN PVFAT_IRP_CONTEXT IrpContext,
 485     IN PLARGE_INTEGER WriteOffset,
 486     IN ULONG WriteLength,
 487     IN ULONG BufferOffset,
 488     IN BOOLEAN Wait);
 489
 490 NTSTATUS
 491 VfatBlockDeviceIoControl(
 492     IN PDEVICE_OBJECT DeviceObject,
 493     IN ULONG CtlCode,
 494     IN PVOID InputBuffer,
 495     IN ULONG InputBufferSize,
 496     IN OUT PVOID OutputBuffer,
 497     IN OUT PULONG pOutputBufferSize,
 498     IN BOOLEAN Override);
 499
 500 /* cleanup.c */
 501
 502 NTSTATUS
 503 VfatCleanup(
 504     PVFAT_IRP_CONTEXT IrpContext);
 505
 506 /* close.c */
 507
 508 NTSTATUS
 509 VfatClose(
 510     PVFAT_IRP_CONTEXT IrpContext);
 511
 512 NTSTATUS
 513 VfatCloseFile(
 514     PDEVICE_EXTENSION DeviceExt,
 515     PFILE_OBJECT FileObject);
 516
 517 /* create.c */
 518
 519 NTSTATUS
 520 VfatCreate(
 521     PVFAT_IRP_CONTEXT IrpContext);
 522
 523 NTSTATUS
 524 FindFile(
 525     PDEVICE_EXTENSION DeviceExt,
 526     PVFATFCB Parent,
 527     PUNICODE_STRING FileToFindU,
 528     PVFAT_DIRENTRY_CONTEXT DirContext,
 529     BOOLEAN First);
 530
 531 VOID
 532 vfat8Dot3ToString(
 533     PFAT_DIR_ENTRY pEntry,
 534     PUNICODE_STRING NameU);
 535
 536 NTSTATUS
 537 ReadVolumeLabel(
 538     PDEVICE_EXTENSION DeviceExt,
 539     PVPB Vpb);
 540
 541 /* dir.c */
 542
 543 NTSTATUS
 544 VfatDirectoryControl(
 545     PVFAT_IRP_CONTEXT IrpContext);
 546
 547 BOOLEAN
 548 FsdDosDateTimeToSystemTime(
 549     PDEVICE_EXTENSION DeviceExt,
 550     USHORT DosDate,
 551     USHORT DosTime,
 552     PLARGE_INTEGER SystemTime);
 553
 554 BOOLEAN
 555 FsdSystemTimeToDosDateTime(
 556     PDEVICE_EXTENSION DeviceExt,
 557     PLARGE_INTEGER SystemTime,
 558     USHORT *pDosDate,
 559     USHORT *pDosTime);
 560
 561 /* direntry.c */
 562
 563 ULONG
 564 vfatDirEntryGetFirstCluster(
 565     PDEVICE_EXTENSION pDeviceExt,
 566     PDIR_ENTRY pDirEntry);
 567
 568 BOOLEAN
 569 VfatIsDirectoryEmpty(
 570     PVFATFCB Fcb);
 571
 572 NTSTATUS
 573 FATGetNextDirEntry(
 574     PVOID *pContext,
 575     PVOID *pPage,
 576     IN PVFATFCB pDirFcb,
 577     IN PVFAT_DIRENTRY_CONTEXT DirContext,
 578     BOOLEAN First);
 579
 580 NTSTATUS
 581 FATXGetNextDirEntry(
 582     PVOID *pContext,
 583     PVOID *pPage,
 584     IN PVFATFCB pDirFcb,
 585     IN PVFAT_DIRENTRY_CONTEXT DirContext,
 586     BOOLEAN First);
 587
 588 /* dirwr.c */
 589
 590 NTSTATUS
 591 VfatAddEntry(
 592     PDEVICE_EXTENSION DeviceExt,
 593     PUNICODE_STRING PathNameU,
 594     PVFATFCB* Fcb,
 595     PVFATFCB ParentFcb,
 596     ULONG RequestedOptions,
 597     UCHAR ReqAttr);
 598
 599 NTSTATUS
 600 VfatUpdateEntry(
 601     PVFATFCB pFcb);
 602
 603 NTSTATUS
 604 VfatDelEntry(
 605     PDEVICE_EXTENSION,
 606     PVFATFCB);
 607
 608 BOOLEAN
 609 vfatFindDirSpace(
 610     PDEVICE_EXTENSION DeviceExt,
 611     PVFATFCB pDirFcb,
 612     ULONG nbSlots,
 613     PULONG start);
 614
 615 /* ea.h */
 616
 617 NTSTATUS
 618 VfatSetExtendedAttributes(
 619     PFILE_OBJECT FileObject,
 620     PVOID Ea,
 621     ULONG EaLength);
 622
 623 /* fastio.c */
 624
 625 VOID
 626 VfatInitFastIoRoutines(
 627     PFAST_IO_DISPATCH FastIoDispatch);
 628
 629 BOOLEAN
 630 NTAPI
 631 VfatAcquireForLazyWrite(
 632     IN PVOID Context,
 633     IN BOOLEAN Wait);
 634
 635 VOID
 636 NTAPI
 637 VfatReleaseFromLazyWrite(
 638     IN PVOID Context);
 639
 640 BOOLEAN
 641 NTAPI
 642 VfatAcquireForReadAhead(
 643     IN PVOID Context,
 644     IN BOOLEAN Wait);
 645
 646 VOID
 647 NTAPI
 648 VfatReleaseFromReadAhead(
 649     IN PVOID Context);
 650
 651 /* fat.c */
 652
 653 NTSTATUS
 654 FAT12GetNextCluster(
 655     PDEVICE_EXTENSION DeviceExt,
 656     ULONG CurrentCluster,
 657     PULONG NextCluster);
 658
 659 NTSTATUS
 660 FAT12FindAndMarkAvailableCluster(
 661     PDEVICE_EXTENSION DeviceExt,
 662     PULONG Cluster);
 663
 664 NTSTATUS
 665 FAT12WriteCluster(
 666     PDEVICE_EXTENSION DeviceExt,
 667     ULONG ClusterToWrite,
 668     ULONG NewValue,
 669     PULONG OldValue);
 670
 671 NTSTATUS
 672 FAT16GetNextCluster(
 673     PDEVICE_EXTENSION DeviceExt,
 674     ULONG CurrentCluster,
 675     PULONG NextCluster);
 676
 677 NTSTATUS
 678 FAT16FindAndMarkAvailableCluster(
 679     PDEVICE_EXTENSION DeviceExt,
 680     PULONG Cluster);
 681
 682 NTSTATUS
 683 FAT16WriteCluster(
 684     PDEVICE_EXTENSION DeviceExt,
 685     ULONG ClusterToWrite,
 686     ULONG NewValue,
 687     PULONG OldValue);
 688
 689 NTSTATUS
 690 FAT32GetNextCluster(
 691     PDEVICE_EXTENSION DeviceExt,
 692     ULONG CurrentCluster,
 693     PULONG NextCluster);
 694
 695 NTSTATUS
 696 FAT32FindAndMarkAvailableCluster(
 697     PDEVICE_EXTENSION DeviceExt,
 698     PULONG Cluster);
 699
 700 NTSTATUS
 701 FAT32WriteCluster(
 702     PDEVICE_EXTENSION DeviceExt,
 703     ULONG ClusterToWrite,
 704     ULONG NewValue,
 705     PULONG OldValue);
 706
 707 NTSTATUS
 708 OffsetToCluster(
 709     PDEVICE_EXTENSION DeviceExt,
 710     ULONG FirstCluster,
 711     ULONG FileOffset,
 712     PULONG Cluster,
 713     BOOLEAN Extend);
 714
 715 ULONGLONG
 716 ClusterToSector(
 717     PDEVICE_EXTENSION DeviceExt,
 718     ULONG Cluster);
 719
 720 NTSTATUS
 721 GetNextCluster(
 722     PDEVICE_EXTENSION DeviceExt,
 723     ULONG CurrentCluster,
 724     PULONG NextCluster);
 725
 726 NTSTATUS
 727 GetNextClusterExtend(
 728     PDEVICE_EXTENSION DeviceExt,
 729     ULONG CurrentCluster,
 730     PULONG NextCluster);
 731
 732 NTSTATUS
 733 CountAvailableClusters(
 734     PDEVICE_EXTENSION DeviceExt,
 735     PLARGE_INTEGER Clusters);
 736
 737 NTSTATUS
 738 WriteCluster(
 739     PDEVICE_EXTENSION DeviceExt,
 740     ULONG ClusterToWrite,
 741     ULONG NewValue);
 742
 743 /* fcb.c */
 744
 745 PVFATFCB
 746 vfatNewFCB(
 747     PDEVICE_EXTENSION pVCB,
 748     PUNICODE_STRING pFileNameU);
 749
 750 VOID
 751 vfatDestroyFCB(
 752     PVFATFCB pFCB);
 753
 754 VOID
 755 vfatDestroyCCB(
 756     PVFATCCB pCcb);
 757
 758 VOID
 759 vfatGrabFCB(
 760     PDEVICE_EXTENSION pVCB,
 761     PVFATFCB pFCB);
 762
 763 VOID
 764 vfatReleaseFCB(
 765     PDEVICE_EXTENSION pVCB,
 766     PVFATFCB pFCB);
 767
 768 VOID
 769 vfatAddFCBToTable(
 770     PDEVICE_EXTENSION pVCB,
 771     PVFATFCB pFCB);
 772
 773 PVFATFCB
 774 vfatGrabFCBFromTable(
 775     PDEVICE_EXTENSION pDeviceExt,
 776     PUNICODE_STRING pFileNameU);
 777
 778 PVFATFCB
 779 vfatMakeRootFCB(
 780     PDEVICE_EXTENSION pVCB);
 781
 782 PVFATFCB
 783 vfatOpenRootFCB(
 784     PDEVICE_EXTENSION pVCB);
 785
 786 BOOLEAN
 787 vfatFCBIsDirectory(
 788     PVFATFCB FCB);
 789
 790 BOOLEAN
 791 vfatFCBIsRoot(
 792     PVFATFCB FCB);
 793
 794 NTSTATUS
 795 vfatAttachFCBToFileObject(
 796     PDEVICE_EXTENSION vcb,
 797     PVFATFCB fcb,
 798     PFILE_OBJECT fileObject);
 799
 800 NTSTATUS
 801 vfatDirFindFile(
 802     PDEVICE_EXTENSION pVCB,
 803     PVFATFCB parentFCB,
 804     PUNICODE_STRING FileToFindU,
 805     PVFATFCB *fileFCB);
 806
 807 NTSTATUS
 808 vfatGetFCBForFile(
 809     PDEVICE_EXTENSION pVCB,
 810     PVFATFCB *pParentFCB,
 811     PVFATFCB *pFCB,
 812     PUNICODE_STRING pFileNameU);
 813
 814 NTSTATUS
 815 vfatMakeFCBFromDirEntry(
 816     PVCB vcb,
 817     PVFATFCB directoryFCB,
 818     PVFAT_DIRENTRY_CONTEXT DirContext,
 819     PVFATFCB *fileFCB);
 820
 821 /* finfo.c */
 822
 823 NTSTATUS
 824 VfatQueryInformation(
 825     PVFAT_IRP_CONTEXT IrpContext);
 826
 827 NTSTATUS
 828 VfatSetInformation(
 829     PVFAT_IRP_CONTEXT IrpContext);
 830
 831 NTSTATUS
 832 VfatSetAllocationSizeInformation(
 833     PFILE_OBJECT FileObject,
 834     PVFATFCB Fcb,
 835     PDEVICE_EXTENSION DeviceExt,
 836     PLARGE_INTEGER AllocationSize);
 837
 838 /* flush.c */
 839
 840 NTSTATUS
 841 VfatFlush(
 842     PVFAT_IRP_CONTEXT IrpContext);
 843
 844 NTSTATUS
 845 VfatFlushVolume(
 846     PDEVICE_EXTENSION DeviceExt,
 847     PVFATFCB VolumeFcb);
 848
 849 /* fsctl.c */
 850
 851 NTSTATUS
 852 VfatFileSystemControl(
 853     PVFAT_IRP_CONTEXT IrpContext);
 854
 855 /* iface.c */
 856
 857 NTSTATUS
 858 NTAPI
 859 DriverEntry(
 860     PDRIVER_OBJECT DriverObject,
 861     PUNICODE_STRING RegistryPath);
 862
 863
 864 /* misc.c */
 865
 866 NTSTATUS
 867 VfatQueueRequest(
 868     PVFAT_IRP_CONTEXT IrpContext);
 869
 870 PVFAT_IRP_CONTEXT
 871 VfatAllocateIrpContext(
 872     PDEVICE_OBJECT DeviceObject,
 873     PIRP Irp);
 874
 875 VOID
 876 VfatFreeIrpContext(
 877     PVFAT_IRP_CONTEXT IrpContext);
 878
 879 DRIVER_DISPATCH
 880 VfatBuildRequest;
 881
 882 NTSTATUS
 883 NTAPI
 884 VfatBuildRequest(
 885     PDEVICE_OBJECT DeviceObject,
 886     PIRP Irp);
 887
 888 PVOID
 889 VfatGetUserBuffer(
 890     IN PIRP);
 891
 892 NTSTATUS
 893 VfatLockUserBuffer(
 894     IN PIRP,
 895     IN ULONG,
 896     IN LOCK_OPERATION);
 897
 898 /* pnp.c */
 899
 900 NTSTATUS
 901 VfatPnp(
 902     PVFAT_IRP_CONTEXT IrpContext);
 903
 904 /* rw.c */
 905
 906 NTSTATUS
 907 VfatRead(
 908     PVFAT_IRP_CONTEXT IrpContext);
 909
 910 NTSTATUS
 911 VfatWrite(
 912     PVFAT_IRP_CONTEXT IrpContext);
 913
 914 NTSTATUS
 915 NextCluster(
 916     PDEVICE_EXTENSION DeviceExt,
 917     ULONG FirstCluster,
 918     PULONG CurrentCluster,
 919     BOOLEAN Extend);
 920
 921 /* shutdown.c */
 922
 923 DRIVER_DISPATCH
 924 VfatShutdown;
 925
 926 NTSTATUS
 927 NTAPI
 928 VfatShutdown(
 929     PDEVICE_OBJECT DeviceObject,
 930     PIRP Irp);
 931
 932 /* string.c */
 933
 934 VOID
 935 vfatSplitPathName(
 936     PUNICODE_STRING PathNameU,
 937     PUNICODE_STRING DirNameU,
 938     PUNICODE_STRING FileNameU);
 939
 940 BOOLEAN
 941 vfatIsLongIllegal(
 942     WCHAR c);
 943
 944 BOOLEAN
 945 wstrcmpjoki(
 946     PWSTR s1,
 947     PWSTR s2);
 948
 949 /* volume.c */
 950
 951 NTSTATUS
 952 VfatQueryVolumeInformation(
 953     PVFAT_IRP_CONTEXT IrpContext);
 954
 955 NTSTATUS
 956 VfatSetVolumeInformation(
 957     PVFAT_IRP_CONTEXT IrpContext);
 958
 959 #endif /* _FASTFAT_PCH_ */