Nt32Pkg/WinNtSimpleFileSystemDxe/WinNtSimpleFileSystem.c

   1 /**@file
   2
   3 Copyright (c) 2006 - 2008, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   WinNtSimpleFileSystem.c
  15
  16 Abstract:
  17
  18   Produce Simple File System abstractions for directories on your PC using Win32 APIs.
  19   The configuration of what devices to mount or emulate comes from NT
  20   environment variables. The variables must be visible to the Microsoft*
  21   Developer Studio for them to work.
  22
  23   * Other names and brands may be claimed as the property of others.
  24
  25 **/
  26
  27 //
  28 // The package level header files this module uses
  29 //
  30 #include <Uefi.h>
  31 #include <WinNtDxe.h>
  32 //
  33 // The protocols, PPI and GUID defintions for this module
  34 //
  35 #include <Guid/FileSystemVolumeLabelInfo.h>
  36 #include <Protocol/WinNtIo.h>
  37 #include <Protocol/ComponentName.h>
  38 #include <Guid/FileInfo.h>
  39 #include <Protocol/DriverBinding.h>
  40 #include <Guid/FileSystemInfo.h>
  41 #include <Protocol/SimpleFileSystem.h>
  42 //
  43 // The Library classes this module consumes
  44 //
  45 #include <Library/DebugLib.h>
  46 #include <Library/BaseLib.h>
  47 #include <Library/UefiDriverEntryPoint.h>
  48 #include <Library/UefiLib.h>
  49 #include <Library/BaseMemoryLib.h>
  50 #include <Library/UefiBootServicesTableLib.h>
  51 #include <Library/MemoryAllocationLib.h>
  52
  53 #include "WinNtSimpleFileSystem.h"
  54
  55 EFI_DRIVER_BINDING_PROTOCOL gWinNtSimpleFileSystemDriverBinding = {
  56   WinNtSimpleFileSystemDriverBindingSupported,
  57   WinNtSimpleFileSystemDriverBindingStart,
  58   WinNtSimpleFileSystemDriverBindingStop,
  59   0xa,
  60   NULL,
  61   NULL
  62 };
  63
  64 /**
  65   The user Entry Point for module WinNtSimpleFileSystem. The user code starts with this function.
  66
  67   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
  68   @param[in] SystemTable    A pointer to the EFI System Table.
  69
  70   @retval EFI_SUCCESS       The entry point is executed successfully.
  71   @retval other             Some error occurs when executing this entry point.
  72
  73 **/
  74 EFI_STATUS
  75 EFIAPI
  76 InitializeWinNtSimpleFileSystem(
  77   IN EFI_HANDLE           ImageHandle,
  78   IN EFI_SYSTEM_TABLE     *SystemTable
  79   )
  80 {
  81   EFI_STATUS              Status;
  82
  83   //
  84   // Install driver model protocol(s).
  85   //
  86   Status = EfiLibInstallDriverBindingComponentName2 (
  87              ImageHandle,
  88              SystemTable,
  89              &gWinNtSimpleFileSystemDriverBinding,
  90              ImageHandle,
  91              &gWinNtSimpleFileSystemComponentName,
  92              &gWinNtSimpleFileSystemComponentName2
  93              );
  94   ASSERT_EFI_ERROR (Status);
  95
  96
  97   return Status;
  98 }
  99
 100 CHAR16 *
 101 EfiStrChr (
 102   IN CHAR16   *Str,
 103   IN CHAR16   Chr
 104   )
 105 /*++
 106
 107 Routine Description:
 108
 109   Locate the first occurance of a character in a string.
 110
 111 Arguments:
 112
 113   Str - Pointer to NULL terminated unicode string.
 114   Chr - Character to locate.
 115
 116 Returns:
 117
 118   If Str is NULL, then NULL is returned.
 119   If Chr is not contained in Str, then NULL is returned.
 120   If Chr is contained in Str, then a pointer to the first occurance of Chr in Str is returned.
 121
 122 --*/
 123 {
 124   if (Str == NULL) {
 125     return Str;
 126   }
 127
 128   while (*Str != '\0' && *Str != Chr) {
 129     ++Str;
 130   }
 131
 132   return (*Str == Chr) ? Str : NULL;
 133 }
 134
 135 BOOLEAN
 136 IsZero (
 137   IN VOID   *Buffer,
 138   IN UINTN  Length
 139   )
 140 /*++
 141
 142 Routine Description:
 143
 144   TODO: Add function description
 145
 146 Arguments:
 147
 148   Buffer  - TODO: add argument description
 149   Length  - TODO: add argument description
 150
 151 Returns:
 152
 153   TODO: add return values
 154
 155 --*/
 156 {
 157   if (Buffer == NULL || Length == 0) {
 158     return FALSE;
 159   }
 160
 161   if (*(UINT8 *) Buffer != 0) {
 162     return FALSE;
 163   }
 164
 165   if (Length > 1) {
 166     if (!CompareMem (Buffer, (UINT8 *) Buffer + 1, Length - 1)) {
 167       return FALSE;
 168     }
 169   }
 170
 171   return TRUE;
 172 }
 173
 174 VOID
 175 CutPrefix (
 176   IN  CHAR16  *Str,
 177   IN  UINTN   Count
 178   )
 179 /*++
 180
 181 Routine Description:
 182
 183   TODO: Add function description
 184
 185 Arguments:
 186
 187   Str   - TODO: add argument description
 188   Count - TODO: add argument description
 189
 190 Returns:
 191
 192   TODO: add return values
 193
 194 --*/
 195 {
 196   CHAR16  *Pointer;
 197
 198   if (StrLen (Str) < Count) {
 199     ASSERT (0);
 200   }
 201
 202   if (Count != 0) {
 203     for (Pointer = Str; *(Pointer + Count); Pointer++) {
 204       *Pointer = *(Pointer + Count);
 205     }
 206     *Pointer = *(Pointer + Count);
 207   }
 208 }
 209
 210
 211
 212 EFI_STATUS
 213 EFIAPI
 214 WinNtSimpleFileSystemDriverBindingSupported (
 215   IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
 216   IN  EFI_HANDLE                   ControllerHandle,
 217   IN  EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
 218   )
 219 /*++
 220
 221 Routine Description:
 222
 223   Check to see if the driver supports a given controller.
 224
 225 Arguments:
 226
 227   This                - A pointer to an instance of the EFI_DRIVER_BINDING_PROTOCOL.
 228
 229   ControllerHandle    - EFI handle of the controller to test.
 230
 231   RemainingDevicePath - Pointer to remaining portion of a device path.
 232
 233 Returns:
 234
 235   EFI_SUCCESS         - The device specified by ControllerHandle and RemainingDevicePath is supported by the driver
 236                         specified by This.
 237
 238   EFI_ALREADY_STARTED - The device specified by ControllerHandle and RemainingDevicePath is already being managed by
 239                         the driver specified by This.
 240
 241   EFI_ACCESS_DENIED   - The device specified by ControllerHandle and RemainingDevicePath is already being managed by
 242                         a different driver or an application that requires exclusive access.
 243
 244   EFI_UNSUPPORTED     - The device specified by ControllerHandle and RemainingDevicePath is not supported by the
 245                         driver specified by This.
 246
 247 --*/
 248 {
 249   EFI_STATUS              Status;
 250   EFI_WIN_NT_IO_PROTOCOL  *WinNtIo;
 251
 252   //
 253   // Open the IO Abstraction(s) needed to perform the supported test
 254   //
 255   Status = gBS->OpenProtocol (
 256                   ControllerHandle,
 257                   &gEfiWinNtIoProtocolGuid,
 258                   &WinNtIo,
 259                   This->DriverBindingHandle,
 260                   ControllerHandle,
 261                   EFI_OPEN_PROTOCOL_BY_DRIVER
 262                   );
 263   if (EFI_ERROR (Status)) {
 264     return Status;
 265   }
 266
 267   //
 268   // Make sure GUID is for a File System handle.
 269   //
 270   Status = EFI_UNSUPPORTED;
 271   if (CompareGuid (WinNtIo->TypeGuid, &gEfiWinNtFileSystemGuid)) {
 272     Status = EFI_SUCCESS;
 273   }
 274
 275   //
 276   // Close the I/O Abstraction(s) used to perform the supported test
 277   //
 278   gBS->CloseProtocol (
 279         ControllerHandle,
 280         &gEfiWinNtIoProtocolGuid,
 281         This->DriverBindingHandle,
 282         ControllerHandle
 283         );
 284
 285   return Status;
 286 }
 287
 288 EFI_STATUS
 289 EFIAPI
 290 WinNtSimpleFileSystemDriverBindingStart (
 291   IN  EFI_DRIVER_BINDING_PROTOCOL   *This,
 292   IN  EFI_HANDLE                    ControllerHandle,
 293   IN  EFI_DEVICE_PATH_PROTOCOL      *RemainingDevicePath
 294   )
 295 /*++
 296
 297 Routine Description:
 298
 299   Starts a device controller or a bus controller.
 300
 301 Arguments:
 302
 303   This                - A pointer to an instance of the EFI_DRIVER_BINDING_PROTOCOL.
 304
 305   ControllerHandle    - EFI handle of the controller to start.
 306
 307   RemainingDevicePath - Pointer to remaining portion of a device path.
 308
 309 Returns:
 310
 311   EFI_SUCCESS           - The device or bus controller has been started.
 312
 313   EFI_DEVICE_ERROR      - The device could not be started due to a device failure.
 314
 315   EFI_OUT_OF_RESOURCES  - The request could not be completed due to lack of resources.
 316
 317 --*/
 318 {
 319   EFI_STATUS                        Status;
 320   EFI_WIN_NT_IO_PROTOCOL            *WinNtIo;
 321   WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
 322
 323   Private = NULL;
 324
 325   //
 326   // Open the IO Abstraction(s) needed
 327   //
 328   Status = gBS->OpenProtocol (
 329                   ControllerHandle,
 330                   &gEfiWinNtIoProtocolGuid,
 331                   &WinNtIo,
 332                   This->DriverBindingHandle,
 333                   ControllerHandle,
 334                   EFI_OPEN_PROTOCOL_BY_DRIVER
 335                   );
 336   if (EFI_ERROR (Status)) {
 337     return Status;
 338   }
 339
 340   //
 341   // Validate GUID
 342   //
 343   if (!CompareGuid (WinNtIo->TypeGuid, &gEfiWinNtFileSystemGuid)) {
 344     Status = EFI_UNSUPPORTED;
 345     goto Done;
 346   }
 347
 348   Private = AllocatePool (sizeof (WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE));
 349   if (Private == NULL) {
 350     Status = EFI_OUT_OF_RESOURCES;
 351
 352     goto Done;
 353   }
 354
 355   Private->Signature  = WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE_SIGNATURE;
 356   Private->WinNtThunk = WinNtIo->WinNtThunk;
 357
 358   Private->FilePath = WinNtIo->EnvString;
 359
 360   Private->VolumeLabel = AllocatePool (StrSize (L"EFI_EMULATED"));
 361   if (Private->VolumeLabel == NULL) {
 362     Status = EFI_OUT_OF_RESOURCES;
 363     goto Done;
 364   }
 365
 366   StrCpy (Private->VolumeLabel, L"EFI_EMULATED");
 367
 368   Private->SimpleFileSystem.Revision    = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
 369   Private->SimpleFileSystem.OpenVolume  = WinNtSimpleFileSystemOpenVolume;
 370
 371   Private->WinNtThunk->SetErrorMode (SEM_FAILCRITICALERRORS);
 372
 373   Private->ControllerNameTable = NULL;
 374
 375   AddUnicodeString2 (
 376     "eng",
 377     gWinNtSimpleFileSystemComponentName.SupportedLanguages,
 378     &Private->ControllerNameTable,
 379     WinNtIo->EnvString,
 380     TRUE
 381     );
 382   AddUnicodeString2 (
 383     "en",
 384     gWinNtSimpleFileSystemComponentName2.SupportedLanguages,
 385     &Private->ControllerNameTable,
 386     WinNtIo->EnvString,
 387     FALSE
 388     );
 389
 390
 391   Status = gBS->InstallMultipleProtocolInterfaces (
 392                   &ControllerHandle,
 393                   &gEfiSimpleFileSystemProtocolGuid,
 394                   &Private->SimpleFileSystem,
 395                   NULL
 396                   );
 397
 398 Done:
 399   if (EFI_ERROR (Status)) {
 400
 401     if (Private != NULL) {
 402
 403       FreeUnicodeStringTable (Private->ControllerNameTable);
 404
 405       FreePool (Private);
 406     }
 407
 408     gBS->CloseProtocol (
 409           ControllerHandle,
 410           &gEfiWinNtIoProtocolGuid,
 411           This->DriverBindingHandle,
 412           ControllerHandle
 413           );
 414   }
 415
 416   return Status;
 417 }
 418
 419 EFI_STATUS
 420 EFIAPI
 421 WinNtSimpleFileSystemDriverBindingStop (
 422   IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
 423   IN  EFI_HANDLE                   ControllerHandle,
 424   IN  UINTN                        NumberOfChildren,
 425   IN  EFI_HANDLE                   *ChildHandleBuffer
 426   )
 427 /*++
 428
 429 Routine Description:
 430
 431   TODO: Add function description
 432
 433 Arguments:
 434
 435   This              - A pointer to an instance of the EFI_DRIVER_BINDING_PROTOCOL.
 436
 437   ControllerHandle  - A handle to the device to be stopped.
 438
 439   NumberOfChildren  - The number of child device handles in ChildHandleBuffer.
 440
 441   ChildHandleBuffer - An array of child device handles to be freed.
 442
 443 Returns:
 444
 445   EFI_SUCCESS       - The device has been stopped.
 446
 447   EFI_DEVICE_ERROR  - The device could not be stopped due to a device failure.
 448
 449 --*/
 450 // TODO:    EFI_UNSUPPORTED - add return value to function comment
 451 {
 452   EFI_STATUS                        Status;
 453   EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *SimpleFileSystem;
 454   WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
 455
 456   //
 457   // Get our context back
 458   //
 459   Status = gBS->OpenProtocol (
 460                   ControllerHandle,
 461                   &gEfiSimpleFileSystemProtocolGuid,
 462                   &SimpleFileSystem,
 463                   This->DriverBindingHandle,
 464                   ControllerHandle,
 465                   EFI_OPEN_PROTOCOL_GET_PROTOCOL
 466                   );
 467   if (EFI_ERROR (Status)) {
 468     return EFI_UNSUPPORTED;
 469   }
 470
 471   Private = WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (SimpleFileSystem);
 472
 473   //
 474   // Uninstall the Simple File System Protocol from ControllerHandle
 475   //
 476   Status = gBS->UninstallMultipleProtocolInterfaces (
 477                   ControllerHandle,
 478                   &gEfiSimpleFileSystemProtocolGuid,
 479                   &Private->SimpleFileSystem,
 480                   NULL
 481                   );
 482   if (!EFI_ERROR (Status)) {
 483     Status = gBS->CloseProtocol (
 484                     ControllerHandle,
 485                     &gEfiWinNtIoProtocolGuid,
 486                     This->DriverBindingHandle,
 487                     ControllerHandle
 488                     );
 489   }
 490
 491   if (!EFI_ERROR (Status)) {
 492     //
 493     // Free our instance data
 494     //
 495     FreeUnicodeStringTable (Private->ControllerNameTable);
 496
 497     FreePool (Private);
 498   }
 499
 500   return Status;
 501 }
 502
 503 EFI_STATUS
 504 EFIAPI
 505 WinNtSimpleFileSystemOpenVolume (
 506   IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL  *This,
 507   OUT EFI_FILE                        **Root
 508   )
 509 /*++
 510
 511 Routine Description:
 512
 513   Open the root directory on a volume.
 514
 515 Arguments:
 516
 517   This  - A pointer to the volume to open.
 518
 519   Root  - A pointer to storage for the returned opened file handle of the root directory.
 520
 521 Returns:
 522
 523   EFI_SUCCESS           - The volume was opened.
 524
 525   EFI_UNSUPPORTED       - The volume does not support the requested file system type.
 526
 527   EFI_NO_MEDIA          - The device has no media.
 528
 529   EFI_DEVICE_ERROR      - The device reported an error.
 530
 531   EFI_VOLUME_CORRUPTED  - The file system structures are corrupted.
 532
 533   EFI_ACCESS_DENIED     - The service denied access to the file.
 534
 535   EFI_OUT_OF_RESOURCES  - The file volume could not be opened due to lack of resources.
 536
 537   EFI_MEDIA_CHANGED     - The device has new media or the media is no longer supported.
 538
 539 --*/
 540 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
 541 {
 542   EFI_STATUS                        Status;
 543   WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
 544   WIN_NT_EFI_FILE_PRIVATE           *PrivateFile;
 545   EFI_TPL                           OldTpl;
 546
 547   if (This == NULL || Root == NULL) {
 548     return EFI_INVALID_PARAMETER;
 549   }
 550
 551   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
 552
 553   Private     = WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (This);
 554
 555   PrivateFile = AllocatePool (sizeof (WIN_NT_EFI_FILE_PRIVATE));
 556   if (PrivateFile == NULL) {
 557     Status = EFI_OUT_OF_RESOURCES;
 558     goto Done;
 559   }
 560
 561   PrivateFile->FileName = AllocatePool (StrSize (Private->FilePath));
 562   if (PrivateFile->FileName == NULL) {
 563     Status = EFI_OUT_OF_RESOURCES;
 564     goto Done;
 565   }
 566
 567   PrivateFile->FilePath = AllocatePool (StrSize (Private->FilePath));
 568   if (PrivateFile->FilePath == NULL) {
 569     Status = EFI_OUT_OF_RESOURCES;
 570     goto Done;
 571   }
 572
 573   StrCpy (PrivateFile->FilePath, Private->FilePath);
 574   StrCpy (PrivateFile->FileName, PrivateFile->FilePath);
 575   PrivateFile->Signature            = WIN_NT_EFI_FILE_PRIVATE_SIGNATURE;
 576   PrivateFile->WinNtThunk           = Private->WinNtThunk;
 577   PrivateFile->SimpleFileSystem     = This;
 578   PrivateFile->IsRootDirectory      = TRUE;
 579   PrivateFile->IsDirectoryPath      = TRUE;
 580   PrivateFile->IsOpenedByRead       = TRUE;
 581   PrivateFile->EfiFile.Revision     = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
 582   PrivateFile->EfiFile.Open         = WinNtSimpleFileSystemOpen;
 583   PrivateFile->EfiFile.Close        = WinNtSimpleFileSystemClose;
 584   PrivateFile->EfiFile.Delete       = WinNtSimpleFileSystemDelete;
 585   PrivateFile->EfiFile.Read         = WinNtSimpleFileSystemRead;
 586   PrivateFile->EfiFile.Write        = WinNtSimpleFileSystemWrite;
 587   PrivateFile->EfiFile.GetPosition  = WinNtSimpleFileSystemGetPosition;
 588   PrivateFile->EfiFile.SetPosition  = WinNtSimpleFileSystemSetPosition;
 589   PrivateFile->EfiFile.GetInfo      = WinNtSimpleFileSystemGetInfo;
 590   PrivateFile->EfiFile.SetInfo      = WinNtSimpleFileSystemSetInfo;
 591   PrivateFile->EfiFile.Flush        = WinNtSimpleFileSystemFlush;
 592   PrivateFile->LHandle              = INVALID_HANDLE_VALUE;
 593   PrivateFile->DirHandle            = INVALID_HANDLE_VALUE;
 594   PrivateFile->IsValidFindBuf       = FALSE;
 595
 596   *Root = &PrivateFile->EfiFile;
 597
 598   Status = EFI_SUCCESS;
 599
 600 Done:
 601   if (EFI_ERROR (Status)) {
 602     if (PrivateFile) {
 603       if (PrivateFile->FileName) {
 604         FreePool (PrivateFile->FileName);
 605       }
 606
 607       if (PrivateFile->FilePath) {
 608         FreePool (PrivateFile->FilePath);
 609       }
 610
 611       FreePool (PrivateFile);
 612     }
 613   }
 614
 615   gBS->RestoreTPL (OldTpl);
 616
 617   return Status;
 618 }
 619
 620 /**
 621   Count the number of Leading Dot in FileNameToken.
 622
 623   @param FileNameToken  A string representing a token in the path name.
 624
 625   @return  UINTN             The number of leading dot in the name.
 626
 627 **/
 628 UINTN
 629 CountLeadingDots (
 630   IN CONST CHAR16 * FileNameToken
 631   )
 632 {
 633   UINTN          Num;
 634
 635   Num = 0;
 636   while (*FileNameToken == L'.') {
 637     Num++;
 638     FileNameToken++;
 639   }
 640
 641   return Num;
 642 }
 643
 644 BOOLEAN
 645 IsFileNameTokenValid (
 646   IN CONST CHAR16 * FileNameToken
 647   )
 648 {
 649   UINTN Num;
 650   if (StrStr (FileNameToken, L"/") != NULL) {
 651     //
 652     // No L'/' in file name.
 653     //
 654     return FALSE;
 655   } else {
 656     //
 657     // If Token has all dot, the number should not exceed 2
 658     //
 659     Num = CountLeadingDots (FileNameToken);
 660
 661     if (Num == StrLen (FileNameToken)) {
 662       //
 663       // If the FileNameToken only contains a number of L'.'.
 664       //
 665       if (Num > 2) {
 666         return FALSE;
 667       }
 668     }
 669   }
 670
 671   return TRUE;
 672 }
 673
 674 /**
 675   Return the first string token found in the indirect pointer a String named by FileName.
 676
 677   On input, FileName is a indirect pointer pointing to a String.
 678   On output, FileName is a updated to point to the next character after the first
 679   found L"\" or NULL if there is no L"\" found.
 680
 681   @param FileName  A indirect pointer pointing to a FileName.
 682
 683   @return  Token      The first string token found before a L"\".
 684
 685 **/
 686 CHAR16 *
 687 GetNextFileNameToken (
 688   IN OUT CONST CHAR16 ** FileName
 689   )
 690 {
 691   CHAR16 *SlashPos;
 692   CHAR16 *Token;
 693   UINTN  Offset;
 694   ASSERT (**FileName != L'\\');
 695   ASSERT (**FileName != L'\0');
 696
 697   SlashPos = StrStr (*FileName, L"\\");
 698   if (SlashPos == NULL) {
 699     Token = AllocateCopyPool (StrSize(*FileName), *FileName);
 700     *FileName = NULL;
 701   } else {
 702     Offset = SlashPos - *FileName;
 703     Token = AllocateZeroPool ((Offset + 1) * sizeof (CHAR16));
 704     StrnCpy (Token, *FileName, Offset);
 705     //
 706     // Point *FileName to the next character after L'\'.
 707     //
 708     *FileName = *FileName + Offset + 1;
 709   }
 710
 711   return Token;
 712 }
 713
 714 /**
 715   Check if a FileName contains only Valid Characters.
 716
 717   If FileName contains only a single L'\', return TRUE.
 718   If FileName contains two adjacent L'\', return FALSE.
 719   If FileName conatins L'/' , return FALSE.
 720   If FielName contains more than two dots seperated with other FileName characters
 721   by L'\', return FALSE. For example, L'.\...\filename.txt' is invalid path name. But L'..TwoDots\filename.txt' is valid path name.
 722
 723   @param FileName  The File Name String to check.
 724
 725   @return  TRUE        FileName only contains valid characters.
 726   @return  FALSE       FileName contains at least one invalid character.
 727
 728 **/
 729
 730 BOOLEAN
 731 IsFileNameValid (
 732   IN CONST CHAR16 *FileName
 733   )
 734 {
 735   CHAR16       *Token;
 736   BOOLEAN      Valid;
 737
 738   //
 739   // If FileName is just L'\', then it is a valid pathname.
 740   //
 741   if (StrCmp (FileName, L"\\") == 0) {
 742     return TRUE;
 743   }
 744   //
 745   // We don't support two or more adjacent L'\'.
 746   //
 747   if (StrStr (FileName, L"\\\\") != NULL) {
 748     return FALSE;
 749   }
 750
 751   //
 752   // Is FileName has a leading L"\", skip to next character.
 753   //
 754   if (FileName [0] == L'\\') {
 755     FileName++;
 756   }
 757
 758   do {
 759     Token = GetNextFileNameToken (&FileName);
 760     Valid = IsFileNameTokenValid (Token);
 761     FreePool (Token);
 762
 763     if (!Valid)
 764       return FALSE;
 765   } while (FileName != NULL);
 766
 767   return TRUE;
 768 }
 769
 770 EFI_STATUS
 771 EFIAPI
 772 WinNtSimpleFileSystemOpen (
 773   IN  EFI_FILE  *This,
 774   OUT EFI_FILE  **NewHandle,
 775   IN  CHAR16    *FileName,
 776   IN  UINT64    OpenMode,
 777   IN  UINT64    Attributes
 778   )
 779 /*++
 780
 781 Routine Description:
 782
 783   Open a file relative to the source file location.
 784
 785 Arguments:
 786
 787   This        - A pointer to the seource file location.
 788
 789   NewHandle   - Pointer to storage for the new file handle.
 790
 791   FileName    - Pointer to the file name to be opened.
 792
 793   OpenMode    - File open mode information.
 794
 795   Attributes  - File creation attributes.
 796
 797 Returns:
 798
 799   EFI_SUCCESS           - The file was opened.
 800
 801   EFI_NOT_FOUND         - The file could not be found in the volume.
 802
 803   EFI_NO_MEDIA          - The device has no media.
 804
 805   EFI_MEDIA_CHANGED     - The device has new media or the media is no longer supported.
 806
 807   EFI_DEVICE_ERROR      - The device reported an error.
 808
 809   EFI_VOLUME_CORRUPTED  - The file system structures are corrupted.
 810
 811   EFI_WRITE_PROTECTED   - The volume or file is write protected.
 812
 813   EFI_ACCESS_DENIED     - The service denied access to the file.
 814
 815   EFI_OUT_OF_RESOURCES  - Not enough resources were available to open the file.
 816
 817   EFI_VOLUME_FULL       - There is not enough space left to create the new file.
 818
 819 --*/
 820 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
 821 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
 822 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
 823 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
 824 {
 825   EFI_FILE                          *Root;
 826   WIN_NT_EFI_FILE_PRIVATE           *PrivateFile;
 827   WIN_NT_EFI_FILE_PRIVATE           *NewPrivateFile;
 828   WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE *PrivateRoot;
 829   EFI_STATUS                        Status;
 830   CHAR16                            *RealFileName;
 831   CHAR16                            *TempFileName;
 832   CHAR16                            *ParseFileName;
 833   CHAR16                            *GuardPointer;
 834   CHAR16                            TempChar;
 835   DWORD                             LastError;
 836   UINTN                             Count;
 837   BOOLEAN                           LoopFinish;
 838   UINTN                             InfoSize;
 839   EFI_FILE_INFO                     *Info;
 840
 841   //
 842   // Check for obvious invalid parameters.
 843   //
 844   if (This == NULL || NewHandle == NULL || FileName == NULL) {
 845     return EFI_INVALID_PARAMETER;
 846   }
 847
 848   switch (OpenMode) {
 849   case EFI_FILE_MODE_CREATE | EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE:
 850     if (Attributes &~EFI_FILE_VALID_ATTR) {
 851       return EFI_INVALID_PARAMETER;
 852     }
 853
 854     if (Attributes & EFI_FILE_READ_ONLY) {
 855       return EFI_INVALID_PARAMETER;
 856     }
 857
 858   //
 859   // fall through
 860   //
 861   case EFI_FILE_MODE_READ:
 862   case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE:
 863     break;
 864
 865   default:
 866     return EFI_INVALID_PARAMETER;
 867   }
 868
 869   //
 870   // Init local variables
 871   //
 872   PrivateFile     = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
 873   PrivateRoot     = WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (PrivateFile->SimpleFileSystem);
 874   NewPrivateFile  = NULL;
 875
 876   //
 877   // Allocate buffer for FileName as the passed in FileName may be read only
 878   //
 879   TempFileName = AllocatePool (StrSize (FileName));
 880   if (TempFileName == NULL) {
 881     return EFI_OUT_OF_RESOURCES;
 882   }
 883   StrCpy (TempFileName, FileName);
 884   FileName = TempFileName;
 885
 886   //
 887   // BUGBUG: assume an open of root
 888   // if current location, return current data
 889   //
 890   if (StrCmp (FileName, L"\\") == 0 || (StrCmp (FileName, L".") == 0 && PrivateFile->IsRootDirectory)) {
 891     //
 892     // BUGBUG: assume an open root
 893     //
 894 OpenRoot:
 895     Status          = WinNtSimpleFileSystemOpenVolume (PrivateFile->SimpleFileSystem, &Root);
 896     NewPrivateFile  = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (Root);
 897     goto Done;
 898   }
 899
 900   if (FileName[StrLen (FileName) - 1] == L'\\') {
 901     FileName[StrLen (FileName) - 1]  = 0;
 902   }
 903
 904   //
 905   // If file name does not equal to "." or "..",
 906   // then we trim the leading/trailing blanks and trailing dots
 907   //
 908   if (StrCmp (FileName, L".") != 0 && StrCmp (FileName, L"..") != 0) {
 909     //
 910     // Trim leading blanks
 911     //
 912     Count = 0;
 913     for (TempFileName = FileName;
 914       *TempFileName != 0 && *TempFileName == L' ';
 915       TempFileName++) {
 916       Count++;
 917     }
 918     CutPrefix (FileName, Count);
 919     //
 920     // Trim trailing blanks
 921     //
 922     for (TempFileName = FileName + StrLen (FileName) - 1;
 923       TempFileName >= FileName && (*TempFileName == L' ');
 924       TempFileName--) {
 925       ;
 926     }
 927     *(TempFileName + 1) = 0;
 928   }
 929
 930   //
 931   // Attempt to open the file
 932   //
 933   NewPrivateFile = AllocatePool (sizeof (WIN_NT_EFI_FILE_PRIVATE));
 934   if (NewPrivateFile == NULL) {
 935     Status = EFI_OUT_OF_RESOURCES;
 936     goto Done;
 937   }
 938
 939   CopyMem (NewPrivateFile, PrivateFile, sizeof (WIN_NT_EFI_FILE_PRIVATE));
 940
 941   NewPrivateFile->FilePath = AllocatePool (StrSize (PrivateFile->FileName));
 942   if (NewPrivateFile->FilePath == NULL) {
 943     Status = EFI_OUT_OF_RESOURCES;
 944     goto Done;
 945   }
 946
 947   if (PrivateFile->IsDirectoryPath) {
 948     StrCpy (NewPrivateFile->FilePath, PrivateFile->FileName);
 949   } else {
 950     StrCpy (NewPrivateFile->FilePath, PrivateFile->FilePath);
 951   }
 952
 953   NewPrivateFile->FileName = AllocatePool (StrSize (NewPrivateFile->FilePath) + StrSize (L"\\") + StrSize (FileName));
 954   if (NewPrivateFile->FileName == NULL) {
 955     Status = EFI_OUT_OF_RESOURCES;
 956     goto Done;
 957   }
 958
 959   if (*FileName == L'\\') {
 960     StrCpy (NewPrivateFile->FileName, PrivateRoot->FilePath);
 961     StrCat (NewPrivateFile->FileName, L"\\");
 962     StrCat (NewPrivateFile->FileName, FileName + 1);
 963   } else {
 964     StrCpy (NewPrivateFile->FileName, NewPrivateFile->FilePath);
 965     if (StrCmp (FileName, L"") != 0) {
 966       //
 967       // In case the filename becomes empty, especially after trimming dots and blanks
 968       //
 969       StrCat (NewPrivateFile->FileName, L"\\");
 970       StrCat (NewPrivateFile->FileName, FileName);
 971     }
 972   }
 973
 974   if (!IsFileNameValid (NewPrivateFile->FileName)) {
 975     Status = EFI_NOT_FOUND;
 976     goto Done;
 977   }
 978
 979   //
 980   // Get rid of . and .., except leading . or ..
 981   //
 982
 983   //
 984   // GuardPointer protect simplefilesystem root path not be destroyed
 985   //
 986   GuardPointer  = NewPrivateFile->FileName + StrLen (PrivateRoot->FilePath);
 987
 988   LoopFinish    = FALSE;
 989
 990   while (!LoopFinish) {
 991
 992     LoopFinish = TRUE;
 993
 994     for (ParseFileName = GuardPointer; *ParseFileName; ParseFileName++) {
 995       if (*ParseFileName == L'.' &&
 996           (*(ParseFileName + 1) == 0 || *(ParseFileName + 1) == L'\\') &&
 997           *(ParseFileName - 1) == L'\\'
 998           ) {
 999
1000         //
1001         // cut \.
1002         //
1003         CutPrefix (ParseFileName - 1, 2);
1004         LoopFinish = FALSE;
1005         break;
1006       }
1007
1008       if (*ParseFileName == L'.' &&
1009           *(ParseFileName + 1) == L'.' &&
1010           (*(ParseFileName + 2) == 0 || *(ParseFileName + 2) == L'\\') &&
1011           *(ParseFileName - 1) == L'\\'
1012           ) {
1013
1014         ParseFileName--;
1015         Count = 3;
1016
1017         while (ParseFileName != GuardPointer) {
1018           ParseFileName--;
1019           Count++;
1020           if (*ParseFileName == L'\\') {
1021             break;
1022           }
1023         }
1024
1025         //
1026         // cut \.. and its left directory
1027         //
1028         CutPrefix (ParseFileName, Count);
1029         LoopFinish = FALSE;
1030         break;
1031       }
1032     }
1033   }
1034
1035   if (StrCmp (NewPrivateFile->FileName, PrivateRoot->FilePath) == 0) {
1036     NewPrivateFile->IsRootDirectory = TRUE;
1037     FreePool (NewPrivateFile->FilePath);
1038     FreePool (NewPrivateFile->FileName);
1039     FreePool (NewPrivateFile);
1040     goto OpenRoot;
1041   }
1042
1043   RealFileName = NewPrivateFile->FileName;
1044   while (EfiStrChr (RealFileName, L'\\') != NULL) {
1045     RealFileName = EfiStrChr (RealFileName, L'\\') + 1;
1046   }
1047
1048   TempChar            = *(RealFileName - 1);
1049   *(RealFileName - 1) = 0;
1050
1051   FreePool (NewPrivateFile->FilePath);
1052   NewPrivateFile->FilePath = NULL;
1053   NewPrivateFile->FilePath = AllocatePool (StrSize (NewPrivateFile->FileName));
1054   if (NewPrivateFile->FilePath == NULL) {
1055     Status = EFI_OUT_OF_RESOURCES;
1056     goto Done;
1057   }
1058
1059   StrCpy (NewPrivateFile->FilePath, NewPrivateFile->FileName);
1060
1061   *(RealFileName - 1)             = TempChar;
1062
1063   NewPrivateFile->IsRootDirectory = FALSE;
1064
1065   //
1066   // Test whether file or directory
1067   //
1068   if (OpenMode & EFI_FILE_MODE_CREATE) {
1069     if (Attributes & EFI_FILE_DIRECTORY) {
1070       NewPrivateFile->IsDirectoryPath = TRUE;
1071     } else {
1072       NewPrivateFile->IsDirectoryPath = FALSE;
1073     }
1074   } else {
1075     NewPrivateFile->LHandle = INVALID_HANDLE_VALUE;
1076     NewPrivateFile->LHandle = NewPrivateFile->WinNtThunk->CreateFile (
1077                                                             NewPrivateFile->FileName,
1078                                                             GENERIC_READ,
1079                                                             FILE_SHARE_READ | FILE_SHARE_WRITE,
1080                                                             NULL,
1081                                                             OPEN_EXISTING,
1082                                                             0,
1083                                                             NULL
1084                                                             );
1085
1086     if (NewPrivateFile->LHandle != INVALID_HANDLE_VALUE) {
1087       NewPrivateFile->IsDirectoryPath = FALSE;
1088       NewPrivateFile->WinNtThunk->CloseHandle (NewPrivateFile->LHandle);
1089     } else {
1090       NewPrivateFile->IsDirectoryPath = TRUE;
1091     }
1092
1093     NewPrivateFile->LHandle = INVALID_HANDLE_VALUE;
1094   }
1095
1096   if (OpenMode & EFI_FILE_MODE_WRITE) {
1097     NewPrivateFile->IsOpenedByRead = FALSE;
1098   } else {
1099     NewPrivateFile->IsOpenedByRead = TRUE;
1100   }
1101
1102   Status = EFI_SUCCESS;
1103
1104   //
1105   // deal with directory
1106   //
1107   if (NewPrivateFile->IsDirectoryPath) {
1108
1109     TempFileName = AllocatePool (StrSize (NewPrivateFile->FileName) + StrSize (L"\\*"));
1110     if (TempFileName == NULL) {
1111       Status = EFI_OUT_OF_RESOURCES;
1112       goto Done;
1113     }
1114
1115     StrCpy (TempFileName, NewPrivateFile->FileName);
1116
1117     if ((OpenMode & EFI_FILE_MODE_CREATE)) {
1118       //
1119       // Create a directory
1120       //
1121       if (!NewPrivateFile->WinNtThunk->CreateDirectory (TempFileName, NULL)) {
1122
1123         LastError = PrivateFile->WinNtThunk->GetLastError ();
1124         if (LastError != ERROR_ALREADY_EXISTS) {
1125           FreePool (TempFileName);
1126           Status = EFI_ACCESS_DENIED;
1127           goto Done;
1128         }
1129       }
1130     }
1131
1132     NewPrivateFile->DirHandle = NewPrivateFile->WinNtThunk->CreateFile (
1133                                                               TempFileName,
1134                                                               NewPrivateFile->IsOpenedByRead ? GENERIC_READ : (GENERIC_READ | GENERIC_WRITE),
1135                                                               FILE_SHARE_READ | FILE_SHARE_WRITE,
1136                                                               NULL,
1137                                                               OPEN_EXISTING,
1138                                                               FILE_FLAG_BACKUP_SEMANTICS,
1139                                                               NULL
1140                                                               );
1141
1142     if (NewPrivateFile->DirHandle == INVALID_HANDLE_VALUE) {
1143
1144       NewPrivateFile->DirHandle = NewPrivateFile->WinNtThunk->CreateFile (
1145                                                                 TempFileName,
1146                                                                 GENERIC_READ,
1147                                                                 FILE_SHARE_READ | FILE_SHARE_WRITE,
1148                                                                 NULL,
1149                                                                 OPEN_EXISTING,
1150                                                                 FILE_FLAG_BACKUP_SEMANTICS,
1151                                                                 NULL
1152                                                                 );
1153
1154       if (NewPrivateFile->DirHandle != INVALID_HANDLE_VALUE) {
1155         NewPrivateFile->WinNtThunk->CloseHandle (NewPrivateFile->DirHandle);
1156         NewPrivateFile->DirHandle = INVALID_HANDLE_VALUE;
1157         Status                    = EFI_ACCESS_DENIED;
1158       } else {
1159         Status = EFI_NOT_FOUND;
1160       }
1161
1162       goto Done;
1163     }
1164
1165     //
1166     // Find the first file under it
1167     //
1168     StrCat (TempFileName, L"\\*");
1169     NewPrivateFile->LHandle = NewPrivateFile->WinNtThunk->FindFirstFile (TempFileName, &NewPrivateFile->FindBuf);
1170
1171     if (NewPrivateFile->LHandle == INVALID_HANDLE_VALUE) {
1172       NewPrivateFile->IsValidFindBuf = FALSE;
1173     } else {
1174       NewPrivateFile->IsValidFindBuf = TRUE;
1175     }
1176   } else {
1177     //
1178     // deal with file
1179     //
1180     if (!NewPrivateFile->IsOpenedByRead) {
1181       NewPrivateFile->LHandle = NewPrivateFile->WinNtThunk->CreateFile (
1182                                                               NewPrivateFile->FileName,
1183                                                               GENERIC_READ | GENERIC_WRITE,
1184                                                               FILE_SHARE_READ | FILE_SHARE_WRITE,
1185                                                               NULL,
1186                                                               (OpenMode & EFI_FILE_MODE_CREATE) ? OPEN_ALWAYS : OPEN_EXISTING,
1187                                                               0,
1188                                                               NULL
1189                                                               );
1190
1191       if (NewPrivateFile->LHandle == INVALID_HANDLE_VALUE) {
1192         NewPrivateFile->LHandle = NewPrivateFile->WinNtThunk->CreateFile (
1193                                                                 NewPrivateFile->FileName,
1194                                                                 GENERIC_READ,
1195                                                                 FILE_SHARE_READ | FILE_SHARE_WRITE,
1196                                                                 NULL,
1197                                                                 OPEN_EXISTING,
1198                                                                 0,
1199                                                                 NULL
1200                                                                 );
1201
1202         if (NewPrivateFile->LHandle == INVALID_HANDLE_VALUE) {
1203           Status = EFI_NOT_FOUND;
1204         } else {
1205           Status = EFI_ACCESS_DENIED;
1206           NewPrivateFile->WinNtThunk->CloseHandle (NewPrivateFile->LHandle);
1207           NewPrivateFile->LHandle = INVALID_HANDLE_VALUE;
1208         }
1209       }
1210     } else {
1211       NewPrivateFile->LHandle = NewPrivateFile->WinNtThunk->CreateFile (
1212                                                               NewPrivateFile->FileName,
1213                                                               GENERIC_READ,
1214                                                               FILE_SHARE_READ | FILE_SHARE_WRITE,
1215                                                               NULL,
1216                                                               OPEN_EXISTING,
1217                                                               0,
1218                                                               NULL
1219                                                               );
1220
1221       if (NewPrivateFile->LHandle == INVALID_HANDLE_VALUE) {
1222         Status = EFI_NOT_FOUND;
1223       }
1224     }
1225   }
1226
1227   if ((OpenMode & EFI_FILE_MODE_CREATE) && Status == EFI_SUCCESS) {
1228     //
1229     // Set the attribute
1230     //
1231     InfoSize  = 0;
1232     Info      = NULL;
1233
1234     Status    = WinNtSimpleFileSystemGetInfo (&NewPrivateFile->EfiFile, &gEfiFileInfoGuid, &InfoSize, Info);
1235
1236     if (Status != EFI_BUFFER_TOO_SMALL) {
1237       Status = EFI_DEVICE_ERROR;
1238       goto Done;
1239     }
1240
1241     Info = AllocatePool (InfoSize);
1242     if (Info == NULL) {
1243       Status = EFI_OUT_OF_RESOURCES;
1244       goto Done;
1245     }
1246
1247     Status = WinNtSimpleFileSystemGetInfo (&NewPrivateFile->EfiFile, &gEfiFileInfoGuid, &InfoSize, Info);
1248
1249     if (EFI_ERROR (Status)) {
1250       goto Done;
1251     }
1252
1253     Info->Attribute = Attributes;
1254
1255     WinNtSimpleFileSystemSetInfo (&NewPrivateFile->EfiFile, &gEfiFileInfoGuid, InfoSize, Info);
1256   }
1257
1258 Done: ;
1259   FreePool (FileName);
1260
1261   if (EFI_ERROR (Status)) {
1262     if (NewPrivateFile) {
1263       if (NewPrivateFile->FileName) {
1264         FreePool (NewPrivateFile->FileName);
1265       }
1266
1267       if (NewPrivateFile->FilePath) {
1268         FreePool (NewPrivateFile->FilePath);
1269       }
1270
1271       FreePool (NewPrivateFile);
1272     }
1273   } else {
1274     *NewHandle = &NewPrivateFile->EfiFile;
1275   }
1276
1277   return Status;
1278 }
1279
1280 EFI_STATUS
1281 EFIAPI
1282 WinNtSimpleFileSystemClose (
1283   IN EFI_FILE  *This
1284   )
1285 /*++
1286
1287 Routine Description:
1288
1289   Close the specified file handle.
1290
1291 Arguments:
1292
1293   This  - Pointer to a returned opened file handle.
1294
1295 Returns:
1296
1297   EFI_SUCCESS - The file handle has been closed.
1298
1299 --*/
1300 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
1301 {
1302   WIN_NT_EFI_FILE_PRIVATE *PrivateFile;
1303   EFI_TPL                 OldTpl;
1304
1305   if (This == NULL) {
1306     return EFI_INVALID_PARAMETER;
1307   }
1308
1309   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
1310
1311   PrivateFile = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
1312
1313   if (PrivateFile->LHandle != INVALID_HANDLE_VALUE) {
1314     if (PrivateFile->IsDirectoryPath) {
1315       PrivateFile->WinNtThunk->FindClose (PrivateFile->LHandle);
1316     } else {
1317       PrivateFile->WinNtThunk->CloseHandle (PrivateFile->LHandle);
1318     }
1319
1320     PrivateFile->LHandle = INVALID_HANDLE_VALUE;
1321   }
1322
1323   if (PrivateFile->IsDirectoryPath && PrivateFile->DirHandle != INVALID_HANDLE_VALUE) {
1324     PrivateFile->WinNtThunk->CloseHandle (PrivateFile->DirHandle);
1325     PrivateFile->DirHandle = INVALID_HANDLE_VALUE;
1326   }
1327
1328   if (PrivateFile->FileName) {
1329     FreePool (PrivateFile->FileName);
1330   }
1331
1332   FreePool (PrivateFile);
1333
1334   gBS->RestoreTPL (OldTpl);
1335
1336   return EFI_SUCCESS;
1337 }
1338
1339 EFI_STATUS
1340 EFIAPI
1341 WinNtSimpleFileSystemDelete (
1342   IN EFI_FILE  *This
1343   )
1344 /*++
1345
1346 Routine Description:
1347
1348   Close and delete a file.
1349
1350 Arguments:
1351
1352   This  - Pointer to a returned opened file handle.
1353
1354 Returns:
1355
1356   EFI_SUCCESS             - The file handle was closed and deleted.
1357
1358   EFI_WARN_DELETE_FAILURE - The handle was closed but could not be deleted.
1359
1360 --*/
1361 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
1362 {
1363   EFI_STATUS              Status;
1364   WIN_NT_EFI_FILE_PRIVATE *PrivateFile;
1365   EFI_TPL                 OldTpl;
1366
1367   if (This == NULL) {
1368     return EFI_INVALID_PARAMETER;
1369   }
1370
1371   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
1372
1373   PrivateFile = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
1374
1375   Status      = EFI_WARN_DELETE_FAILURE;
1376
1377   if (PrivateFile->IsDirectoryPath) {
1378     if (PrivateFile->LHandle != INVALID_HANDLE_VALUE) {
1379       PrivateFile->WinNtThunk->FindClose (PrivateFile->LHandle);
1380     }
1381
1382     if (PrivateFile->DirHandle != INVALID_HANDLE_VALUE) {
1383       PrivateFile->WinNtThunk->CloseHandle (PrivateFile->DirHandle);
1384       PrivateFile->DirHandle = INVALID_HANDLE_VALUE;
1385     }
1386
1387     if (PrivateFile->WinNtThunk->RemoveDirectory (PrivateFile->FileName)) {
1388       Status = EFI_SUCCESS;
1389     }
1390   } else {
1391     PrivateFile->WinNtThunk->CloseHandle (PrivateFile->LHandle);
1392     PrivateFile->LHandle = INVALID_HANDLE_VALUE;
1393
1394     if (!PrivateFile->IsOpenedByRead) {
1395       if (PrivateFile->WinNtThunk->DeleteFile (PrivateFile->FileName)) {
1396         Status = EFI_SUCCESS;
1397       }
1398     }
1399   }
1400
1401   FreePool (PrivateFile->FileName);
1402   FreePool (PrivateFile);
1403
1404   gBS->RestoreTPL (OldTpl);
1405
1406   return Status;
1407 }
1408
1409 VOID
1410 WinNtSystemTimeToEfiTime (
1411   IN SYSTEMTIME             *SystemTime,
1412   IN TIME_ZONE_INFORMATION  *TimeZone,
1413   OUT EFI_TIME              *Time
1414   )
1415 /*++
1416
1417 Routine Description:
1418
1419   TODO: Add function description
1420
1421 Arguments:
1422
1423   SystemTime  - TODO: add argument description
1424   TimeZone    - TODO: add argument description
1425   Time        - TODO: add argument description
1426
1427 Returns:
1428
1429   TODO: add return values
1430
1431 --*/
1432 {
1433   Time->Year        = (UINT16) SystemTime->wYear;
1434   Time->Month       = (UINT8) SystemTime->wMonth;
1435   Time->Day         = (UINT8) SystemTime->wDay;
1436   Time->Hour        = (UINT8) SystemTime->wHour;
1437   Time->Minute      = (UINT8) SystemTime->wMinute;
1438   Time->Second      = (UINT8) SystemTime->wSecond;
1439   Time->Nanosecond  = (UINT32) SystemTime->wMilliseconds * 1000000;
1440   Time->TimeZone    = (INT16) TimeZone->Bias;
1441
1442   if (TimeZone->StandardDate.wMonth) {
1443     Time->Daylight = EFI_TIME_ADJUST_DAYLIGHT;
1444   }
1445 }
1446
1447 EFI_STATUS
1448 EFIAPI
1449 WinNtSimpleFileSystemRead (
1450   IN     EFI_FILE  *This,
1451   IN OUT UINTN     *BufferSize,
1452   OUT    VOID      *Buffer
1453   )
1454 /*++
1455
1456 Routine Description:
1457
1458   Read data from a file.
1459
1460 Arguments:
1461
1462   This        - Pointer to a returned open file handle.
1463
1464   BufferSize  - On input, the size of the Buffer.  On output, the number of bytes stored in the Buffer.
1465
1466   Buffer      - Pointer to the first byte of the read Buffer.
1467
1468 Returns:
1469
1470   EFI_SUCCESS           - The data was read.
1471
1472   EFI_NO_MEDIA          - The device has no media.
1473
1474   EFI_DEVICE_ERROR      - The device reported an error.
1475
1476   EFI_VOLUME_CORRUPTED  - The file system structures are corrupted.
1477
1478   EFI_BUFFER_TOO_SMALL  - The supplied buffer size was too small to store the current directory entry.
1479                           *BufferSize has been updated with the size needed to complete the request.
1480
1481 --*/
1482 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
1483 {
1484   WIN_NT_EFI_FILE_PRIVATE *PrivateFile;
1485   EFI_STATUS              Status;
1486   UINTN                   Size;
1487   UINTN                   NameSize;
1488   UINTN                   ResultSize;
1489   UINTN                   Index;
1490   SYSTEMTIME              SystemTime;
1491   EFI_FILE_INFO           *Info;
1492   WCHAR                   *pw;
1493   TIME_ZONE_INFORMATION   TimeZone;
1494   EFI_FILE_INFO           *FileInfo;
1495   UINT64                  Pos;
1496   UINT64                  FileSize;
1497   UINTN                   FileInfoSize;
1498   EFI_TPL                 OldTpl;
1499
1500   if (This == NULL || BufferSize == NULL) {
1501     return EFI_INVALID_PARAMETER;
1502   }
1503
1504   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
1505
1506   PrivateFile = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
1507
1508   if (PrivateFile->LHandle == INVALID_HANDLE_VALUE) {
1509     Status = EFI_DEVICE_ERROR;
1510     goto Done;
1511   }
1512
1513   if (!PrivateFile->IsDirectoryPath) {
1514
1515     if (This->GetPosition (This, &Pos) != EFI_SUCCESS) {
1516       Status = EFI_DEVICE_ERROR;
1517       goto Done;
1518     }
1519
1520     FileInfoSize = SIZE_OF_EFI_FILE_SYSTEM_INFO;
1521     FileInfo = AllocatePool (FileInfoSize);
1522
1523     Status = This->GetInfo (
1524                     This,
1525                     &gEfiFileInfoGuid,
1526                     &FileInfoSize,
1527                     FileInfo
1528                     );
1529
1530     if (Status == EFI_BUFFER_TOO_SMALL) {
1531       FreePool (FileInfo);
1532       FileInfo = AllocatePool (FileInfoSize);
1533       Status = This->GetInfo (
1534                       This,
1535                       &gEfiFileInfoGuid,
1536                       &FileInfoSize,
1537                       FileInfo
1538                       );
1539     }
1540
1541     if (EFI_ERROR (Status)) {
1542       Status = EFI_DEVICE_ERROR;
1543       goto Done;
1544     }
1545
1546     FileSize = FileInfo->FileSize;
1547
1548     FreePool (FileInfo);
1549
1550     if (Pos >= FileSize) {
1551       *BufferSize = 0;
1552       if (Pos == FileSize) {
1553         Status = EFI_SUCCESS;
1554         goto Done;
1555       } else {
1556         Status = EFI_DEVICE_ERROR;
1557         goto Done;
1558       }
1559     }
1560
1561     Status = PrivateFile->WinNtThunk->ReadFile (
1562                                       PrivateFile->LHandle,
1563                                       Buffer,
1564                                       *BufferSize,
1565                                       BufferSize,
1566                                       NULL
1567                                       ) ? EFI_SUCCESS : EFI_DEVICE_ERROR;
1568     goto Done;
1569   }
1570
1571   //
1572   // Read on a directory.  Perform a find next
1573   //
1574   if (!PrivateFile->IsValidFindBuf) {
1575     *BufferSize = 0;
1576     Status = EFI_SUCCESS;
1577     goto Done;
1578   }
1579
1580   Size        = SIZE_OF_EFI_FILE_INFO;
1581
1582   NameSize    = StrSize (PrivateFile->FindBuf.cFileName);
1583
1584   ResultSize  = Size + NameSize;
1585
1586   Status      = EFI_BUFFER_TOO_SMALL;
1587
1588   if (*BufferSize >= ResultSize) {
1589     Status  = EFI_SUCCESS;
1590
1591     Info    = Buffer;
1592     ZeroMem (Info, ResultSize);
1593
1594     Info->Size = ResultSize;
1595
1596     PrivateFile->WinNtThunk->GetTimeZoneInformation (&TimeZone);
1597
1598     PrivateFile->WinNtThunk->FileTimeToLocalFileTime (
1599                               &PrivateFile->FindBuf.ftCreationTime,
1600                               &PrivateFile->FindBuf.ftCreationTime
1601                               );
1602
1603     PrivateFile->WinNtThunk->FileTimeToSystemTime (&PrivateFile->FindBuf.ftCreationTime, &SystemTime);
1604
1605     WinNtSystemTimeToEfiTime (&SystemTime, &TimeZone, &Info->CreateTime);
1606
1607     PrivateFile->WinNtThunk->FileTimeToLocalFileTime (
1608                               &PrivateFile->FindBuf.ftLastWriteTime,
1609                               &PrivateFile->FindBuf.ftLastWriteTime
1610                               );
1611
1612     PrivateFile->WinNtThunk->FileTimeToSystemTime (&PrivateFile->FindBuf.ftLastWriteTime, &SystemTime);
1613
1614     WinNtSystemTimeToEfiTime (&SystemTime, &TimeZone, &Info->ModificationTime);
1615
1616     Info->FileSize      = PrivateFile->FindBuf.nFileSizeLow;
1617
1618     Info->PhysicalSize  = PrivateFile->FindBuf.nFileSizeLow;
1619
1620     if (PrivateFile->FindBuf.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) {
1621       Info->Attribute |= EFI_FILE_ARCHIVE;
1622     }
1623
1624     if (PrivateFile->FindBuf.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN) {
1625       Info->Attribute |= EFI_FILE_HIDDEN;
1626     }
1627
1628     if (PrivateFile->FindBuf.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM) {
1629       Info->Attribute |= EFI_FILE_SYSTEM;
1630     }
1631
1632     if (PrivateFile->FindBuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
1633       Info->Attribute |= EFI_FILE_READ_ONLY;
1634     }
1635
1636     if (PrivateFile->FindBuf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
1637       Info->Attribute |= EFI_FILE_DIRECTORY;
1638     }
1639
1640     NameSize  = NameSize / sizeof (WCHAR);
1641
1642     pw        = (WCHAR *) (((CHAR8 *) Buffer) + Size);
1643
1644     for (Index = 0; Index < NameSize; Index++) {
1645       pw[Index] = PrivateFile->FindBuf.cFileName[Index];
1646     }
1647
1648     if (PrivateFile->WinNtThunk->FindNextFile (PrivateFile->LHandle, &PrivateFile->FindBuf)) {
1649       PrivateFile->IsValidFindBuf = TRUE;
1650     } else {
1651       PrivateFile->IsValidFindBuf = FALSE;
1652     }
1653   }
1654
1655   *BufferSize = ResultSize;
1656
1657 Done:
1658   gBS->RestoreTPL (OldTpl);
1659   return Status;
1660 }
1661
1662 EFI_STATUS
1663 EFIAPI
1664 WinNtSimpleFileSystemWrite (
1665   IN     EFI_FILE  *This,
1666   IN OUT UINTN     *BufferSize,
1667   IN     VOID      *Buffer
1668   )
1669 /*++
1670
1671 Routine Description:
1672
1673   Write data to a file.
1674
1675 Arguments:
1676
1677   This        - Pointer to an opened file handle.
1678
1679   BufferSize  - On input, the number of bytes in the Buffer to write to the file.  On output, the number of bytes
1680                 of data written to the file.
1681
1682   Buffer      - Pointer to the first by of data in the buffer to write to the file.
1683
1684 Returns:
1685
1686   EFI_SUCCESS           - The data was written to the file.
1687
1688   EFI_UNSUPPORTED       - Writes to an open directory are not supported.
1689
1690   EFI_NO_MEDIA          - The device has no media.
1691
1692   EFI_DEVICE_ERROR      - The device reported an error.
1693
1694   EFI_VOLUME_CORRUPTED  - The file system structures are corrupt.
1695
1696   EFI_WRITE_PROTECTED   - The file, directory, volume, or device is write protected.
1697
1698   EFI_ACCESS_DENIED     - The file was opened read-only.
1699
1700   EFI_VOLUME_FULL       - The volume is full.
1701
1702 --*/
1703 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
1704 {
1705   WIN_NT_EFI_FILE_PRIVATE *PrivateFile;
1706   EFI_STATUS              Status;
1707   EFI_TPL                 OldTpl;
1708
1709   if (This == NULL || BufferSize == NULL || Buffer == NULL) {
1710     return EFI_INVALID_PARAMETER;
1711   }
1712
1713   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
1714
1715   PrivateFile = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
1716
1717   if (PrivateFile->LHandle == INVALID_HANDLE_VALUE) {
1718     Status = EFI_DEVICE_ERROR;
1719     goto Done;
1720   }
1721
1722   if (PrivateFile->IsDirectoryPath) {
1723     Status = EFI_UNSUPPORTED;
1724     goto Done;
1725   }
1726
1727   if (PrivateFile->IsOpenedByRead) {
1728     Status = EFI_ACCESS_DENIED;
1729     goto Done;
1730   }
1731
1732   Status = PrivateFile->WinNtThunk->WriteFile (
1733                                     PrivateFile->LHandle,
1734                                     Buffer,
1735                                     *BufferSize,
1736                                     BufferSize,
1737                                     NULL
1738                                     ) ? EFI_SUCCESS : EFI_DEVICE_ERROR;
1739
1740 Done:
1741   gBS->RestoreTPL (OldTpl);
1742   return Status;
1743
1744   //
1745   // bugbug: need to access windows error reporting
1746   //
1747 }
1748
1749 EFI_STATUS
1750 EFIAPI
1751 WinNtSimpleFileSystemSetPosition (
1752   IN EFI_FILE  *This,
1753   IN UINT64    Position
1754   )
1755 /*++
1756
1757 Routine Description:
1758
1759   Set a file's current position.
1760
1761 Arguments:
1762
1763   This      - Pointer to an opened file handle.
1764
1765   Position  - The byte position from the start of the file to set.
1766
1767 Returns:
1768
1769   EFI_SUCCESS     - The file position has been changed.
1770
1771   EFI_UNSUPPORTED - The seek request for non-zero is not supported for directories.
1772
1773 --*/
1774 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
1775 {
1776   EFI_STATUS              Status;
1777   WIN_NT_EFI_FILE_PRIVATE *PrivateFile;
1778   UINT32                  PosLow;
1779   UINT32                  PosHigh;
1780   CHAR16                  *FileName;
1781   EFI_TPL                 OldTpl;
1782
1783   if (This == NULL) {
1784     return EFI_INVALID_PARAMETER;
1785   }
1786
1787   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
1788
1789   PrivateFile = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
1790
1791   if (PrivateFile->IsDirectoryPath) {
1792     if (Position != 0) {
1793       Status = EFI_UNSUPPORTED;
1794       goto Done;
1795     }
1796
1797     FileName = AllocatePool (StrSize (PrivateFile->FileName) + StrSize (L"\\*"));
1798     if (FileName == NULL) {
1799       Status = EFI_OUT_OF_RESOURCES;
1800       goto Done;
1801     }
1802
1803     StrCpy (FileName, PrivateFile->FileName);
1804     StrCat (FileName, L"\\*");
1805
1806     if (PrivateFile->LHandle != INVALID_HANDLE_VALUE) {
1807       PrivateFile->WinNtThunk->FindClose (PrivateFile->LHandle);
1808     }
1809
1810     PrivateFile->LHandle = PrivateFile->WinNtThunk->FindFirstFile (FileName, &PrivateFile->FindBuf);
1811
1812     if (PrivateFile->LHandle == INVALID_HANDLE_VALUE) {
1813       PrivateFile->IsValidFindBuf = FALSE;
1814     } else {
1815       PrivateFile->IsValidFindBuf = TRUE;
1816     }
1817
1818     FreePool (FileName);
1819
1820     Status = (PrivateFile->LHandle == INVALID_HANDLE_VALUE) ? EFI_DEVICE_ERROR : EFI_SUCCESS;
1821   } else {
1822     if (Position == (UINT64) -1) {
1823       PosLow = PrivateFile->WinNtThunk->SetFilePointer (PrivateFile->LHandle, (ULONG) 0, NULL, FILE_END);
1824     } else {
1825       PosHigh = (UINT32) RShiftU64 (Position, 32);
1826
1827       PosLow  = PrivateFile->WinNtThunk->SetFilePointer (PrivateFile->LHandle, (ULONG) Position, &PosHigh, FILE_BEGIN);
1828     }
1829
1830     Status = (PosLow == 0xFFFFFFFF) ? EFI_DEVICE_ERROR : EFI_SUCCESS;
1831   }
1832
1833 Done:
1834   gBS->RestoreTPL (OldTpl);
1835   return Status;
1836 }
1837
1838 EFI_STATUS
1839 EFIAPI
1840 WinNtSimpleFileSystemGetPosition (
1841   IN  EFI_FILE  *This,
1842   OUT UINT64    *Position
1843   )
1844 /*++
1845
1846 Routine Description:
1847
1848   Get a file's current position.
1849
1850 Arguments:
1851
1852   This      - Pointer to an opened file handle.
1853
1854   Position  - Pointer to storage for the current position.
1855
1856 Returns:
1857
1858   EFI_SUCCESS     - The file position has been reported.
1859
1860   EFI_UNSUPPORTED - Not valid for directories.
1861
1862 --*/
1863 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
1864 {
1865   EFI_STATUS              Status;
1866   WIN_NT_EFI_FILE_PRIVATE *PrivateFile;
1867   INT32                   PositionHigh;
1868   UINT64                  PosHigh64;
1869   EFI_TPL                 OldTpl;
1870
1871   if (This == NULL || Position == NULL) {
1872     return EFI_INVALID_PARAMETER;
1873   }
1874
1875   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
1876   PrivateFile   = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
1877
1878   PositionHigh  = 0;
1879   PosHigh64     = 0;
1880
1881   if (PrivateFile->IsDirectoryPath) {
1882
1883     Status = EFI_UNSUPPORTED;
1884     goto Done;
1885
1886   } else {
1887
1888     PositionHigh = 0;
1889     *Position = PrivateFile->WinNtThunk->SetFilePointer (
1890                                           PrivateFile->LHandle,
1891                                           0,
1892                                           &PositionHigh,
1893                                           FILE_CURRENT
1894                                           );
1895
1896     Status = *Position == 0xffffffff ? EFI_DEVICE_ERROR : EFI_SUCCESS;
1897     if (EFI_ERROR (Status)) {
1898       goto Done;
1899     }
1900
1901     PosHigh64 = PositionHigh;
1902     *Position += LShiftU64 (PosHigh64, 32);
1903   }
1904
1905 Done:
1906   gBS->RestoreTPL (OldTpl);
1907   return Status;
1908 }
1909
1910 EFI_STATUS
1911 WinNtSimpleFileSystemFileInfo (
1912   IN     WIN_NT_EFI_FILE_PRIVATE  *PrivateFile,
1913   IN OUT UINTN                    *BufferSize,
1914   OUT    VOID                     *Buffer
1915   )
1916 /*++
1917
1918 Routine Description:
1919
1920   TODO: Add function description
1921
1922 Arguments:
1923
1924   PrivateFile - TODO: add argument description
1925   BufferSize  - TODO: add argument description
1926   Buffer      - TODO: add argument description
1927
1928 Returns:
1929
1930   TODO: add return values
1931
1932 --*/
1933 {
1934   EFI_STATUS                  Status;
1935   UINTN                       Size;
1936   UINTN                       NameSize;
1937   UINTN                       ResultSize;
1938   EFI_FILE_INFO               *Info;
1939   BY_HANDLE_FILE_INFORMATION  FileInfo;
1940   SYSTEMTIME                  SystemTime;
1941   CHAR16                      *RealFileName;
1942   CHAR16                      *TempPointer;
1943   EFI_FILE_INFO               *DirInfo;
1944   UINTN                       ReadSize;
1945   UINT64                      Location;
1946   EFI_STATUS                  DirStatus;
1947
1948
1949   Size        = SIZE_OF_EFI_FILE_INFO;
1950   NameSize    = StrSize (PrivateFile->FileName);
1951   ResultSize  = Size + NameSize;
1952
1953   Status      = EFI_BUFFER_TOO_SMALL;
1954   if (*BufferSize >= ResultSize) {
1955     Status  = EFI_SUCCESS;
1956
1957     Info    = Buffer;
1958     ZeroMem (Info, ResultSize);
1959
1960     Info->Size = ResultSize;
1961     PrivateFile->WinNtThunk->GetFileInformationByHandle (
1962                               PrivateFile->IsDirectoryPath ? PrivateFile->DirHandle : PrivateFile->LHandle,
1963                               &FileInfo
1964                               );
1965     Info->FileSize      = FileInfo.nFileSizeLow;
1966     Info->PhysicalSize  = Info->FileSize;
1967
1968     PrivateFile->WinNtThunk->FileTimeToSystemTime (&FileInfo.ftCreationTime, &SystemTime);
1969     Info->CreateTime.Year   = SystemTime.wYear;
1970     Info->CreateTime.Month  = (UINT8) SystemTime.wMonth;
1971     Info->CreateTime.Day    = (UINT8) SystemTime.wDay;
1972     Info->CreateTime.Hour   = (UINT8) SystemTime.wHour;
1973     Info->CreateTime.Minute = (UINT8) SystemTime.wMinute;
1974     Info->CreateTime.Second = (UINT8) SystemTime.wSecond;
1975
1976     PrivateFile->WinNtThunk->FileTimeToSystemTime (&FileInfo.ftLastAccessTime, &SystemTime);
1977     Info->LastAccessTime.Year   = SystemTime.wYear;
1978     Info->LastAccessTime.Month  = (UINT8) SystemTime.wMonth;
1979     Info->LastAccessTime.Day    = (UINT8) SystemTime.wDay;
1980     Info->LastAccessTime.Hour   = (UINT8) SystemTime.wHour;
1981     Info->LastAccessTime.Minute = (UINT8) SystemTime.wMinute;
1982     Info->LastAccessTime.Second = (UINT8) SystemTime.wSecond;
1983
1984     PrivateFile->WinNtThunk->FileTimeToSystemTime (&FileInfo.ftLastWriteTime, &SystemTime);
1985     Info->ModificationTime.Year   = SystemTime.wYear;
1986     Info->ModificationTime.Month  = (UINT8) SystemTime.wMonth;
1987     Info->ModificationTime.Day    = (UINT8) SystemTime.wDay;
1988     Info->ModificationTime.Hour   = (UINT8) SystemTime.wHour;
1989     Info->ModificationTime.Minute = (UINT8) SystemTime.wMinute;
1990     Info->ModificationTime.Second = (UINT8) SystemTime.wSecond;
1991
1992     if (FileInfo.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) {
1993       Info->Attribute |= EFI_FILE_ARCHIVE;
1994     }
1995
1996     if (FileInfo.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN) {
1997       Info->Attribute |= EFI_FILE_HIDDEN;
1998     }
1999
2000     if (FileInfo.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
2001       Info->Attribute |= EFI_FILE_READ_ONLY;
2002     }
2003
2004     if (FileInfo.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM) {
2005       Info->Attribute |= EFI_FILE_SYSTEM;
2006     }
2007
2008     if (FileInfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
2009       Info->Attribute |= EFI_FILE_DIRECTORY;
2010     }
2011
2012     if (PrivateFile->IsDirectoryPath) {
2013       Info->Attribute |= EFI_FILE_DIRECTORY;
2014     }
2015
2016     RealFileName  = PrivateFile->FileName;
2017     TempPointer   = RealFileName;
2018
2019     while (*TempPointer) {
2020       if (*TempPointer == '\\') {
2021         RealFileName = TempPointer + 1;
2022       }
2023
2024       TempPointer++;
2025     }
2026
2027     if (PrivateFile->IsRootDirectory) {
2028       *((CHAR8 *) Buffer + Size) = 0;
2029     } else {
2030       CopyMem ((CHAR8 *) Buffer + Size, RealFileName, NameSize);
2031     }
2032
2033     if (Info->Attribute & EFI_FILE_DIRECTORY) {
2034       //
2035       // The GetFileInformationByHandle.nFileSizeLow is bogus for dir so we
2036       // need to do the same thing the caller would do to get the right value
2037       //
2038       ASSERT (PrivateFile->EfiFile.Read != NULL);
2039       DirStatus = PrivateFile->EfiFile.GetPosition (&PrivateFile->EfiFile, &Location);
2040       if (EFI_ERROR (DirStatus)) {
2041         Location = 0;
2042       }
2043
2044       PrivateFile->EfiFile.SetPosition (&PrivateFile->EfiFile, 0);
2045       Info->FileSize = 0;
2046       do {
2047         ReadSize = 0;
2048         DirInfo = NULL;
2049         DirStatus = PrivateFile->EfiFile.Read (&PrivateFile->EfiFile, &ReadSize, DirInfo);
2050         if (DirStatus == EFI_BUFFER_TOO_SMALL) {
2051           DirInfo = AllocatePool (ReadSize);
2052           if (DirInfo != NULL) {
2053             //
2054             // Read each dir entry to figure out how big the directory is
2055             //
2056             DirStatus = PrivateFile->EfiFile.Read (&PrivateFile->EfiFile, &ReadSize, DirInfo);
2057             if (!EFI_ERROR (DirStatus) && (ReadSize != 0)) {
2058               Info->FileSize += ReadSize;
2059             }
2060             FreePool (DirInfo);
2061           }
2062         }
2063
2064       } while (!EFI_ERROR (DirStatus) && (ReadSize != 0));
2065
2066       //
2067       // reset the file possition back to the previous location
2068       //
2069       PrivateFile->EfiFile.SetPosition (&PrivateFile->EfiFile, Location);
2070     }
2071   }
2072
2073   *BufferSize = ResultSize;
2074   return Status;
2075 }
2076
2077 EFI_STATUS
2078 EFIAPI
2079 WinNtSimpleFileSystemGetInfo (
2080   IN     EFI_FILE  *This,
2081   IN     EFI_GUID  *InformationType,
2082   IN OUT UINTN     *BufferSize,
2083   OUT    VOID      *Buffer
2084   )
2085 /*++
2086
2087 Routine Description:
2088
2089   Return information about a file or volume.
2090
2091 Arguments:
2092
2093   This            - Pointer to an opened file handle.
2094
2095   InformationType - GUID describing the type of information to be returned.
2096
2097   BufferSize      - On input, the size of the information buffer.  On output, the number of bytes written to the
2098                     information buffer.
2099
2100   Buffer          - Pointer to the first byte of the information buffer.
2101
2102 Returns:
2103
2104   EFI_SUCCESS           - The requested information has been written into the buffer.
2105
2106   EFI_UNSUPPORTED       - The InformationType is not known.
2107
2108   EFI_NO_MEDIA          - The device has no media.
2109
2110   EFI_DEVICE_ERROR      - The device reported an error.
2111
2112   EFI_VOLUME_CORRUPTED  - The file system structures are corrupt.
2113
2114   EFI_BUFFER_TOO_SMALL  - The buffer size was too small to contain the requested information.  The buffer size has
2115                           been updated with the size needed to complete the requested operation.
2116
2117 --*/
2118 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
2119 {
2120   EFI_STATUS                        Status;
2121   WIN_NT_EFI_FILE_PRIVATE           *PrivateFile;
2122   EFI_FILE_SYSTEM_INFO              *FileSystemInfoBuffer;
2123   UINT32                            SectorsPerCluster;
2124   UINT32                            BytesPerSector;
2125   UINT32                            FreeClusters;
2126   UINT32                            TotalClusters;
2127   UINT32                            BytesPerCluster;
2128   CHAR16                            *DriveName;
2129   BOOLEAN                           DriveNameFound;
2130   BOOL                              NtStatus;
2131   UINTN                             Index;
2132   WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE *PrivateRoot;
2133   EFI_TPL                           OldTpl;
2134
2135   if (This == NULL || InformationType == NULL || BufferSize == NULL) {
2136     return EFI_INVALID_PARAMETER;
2137   }
2138
2139   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
2140
2141   PrivateFile = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
2142   PrivateRoot = WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (PrivateFile->SimpleFileSystem);
2143
2144   Status      = EFI_UNSUPPORTED;
2145
2146   if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {
2147     Status = WinNtSimpleFileSystemFileInfo (PrivateFile, BufferSize, Buffer);
2148   }
2149
2150   if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
2151     if (*BufferSize < SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel)) {
2152       *BufferSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel);
2153       Status = EFI_BUFFER_TOO_SMALL;
2154       goto Done;
2155     }
2156
2157     FileSystemInfoBuffer            = (EFI_FILE_SYSTEM_INFO *) Buffer;
2158     FileSystemInfoBuffer->Size      = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel);
2159     FileSystemInfoBuffer->ReadOnly  = FALSE;
2160
2161     //
2162     // Try to get the drive name
2163     //
2164     DriveNameFound  = FALSE;
2165     DriveName = AllocatePool (StrSize (PrivateFile->FilePath) + 1);
2166     if (DriveName == NULL) {
2167       Status = EFI_OUT_OF_RESOURCES;
2168       goto Done;
2169     }
2170
2171     StrCpy (DriveName, PrivateFile->FilePath);
2172     for (Index = 0; DriveName[Index] != 0 && DriveName[Index] != ':'; Index++) {
2173       ;
2174     }
2175
2176     if (DriveName[Index] == ':') {
2177       DriveName[Index + 1]  = '\\';
2178       DriveName[Index + 2]  = 0;
2179       DriveNameFound        = TRUE;
2180     } else if (DriveName[0] == '\\' && DriveName[1] == '\\') {
2181       for (Index = 2; DriveName[Index] != 0 && DriveName[Index] != '\\'; Index++) {
2182         ;
2183       }
2184
2185       if (DriveName[Index] == '\\') {
2186         DriveNameFound = TRUE;
2187         for (Index++; DriveName[Index] != 0 && DriveName[Index] != '\\'; Index++) {
2188           ;
2189         }
2190
2191         DriveName[Index]      = '\\';
2192         DriveName[Index + 1]  = 0;
2193       }
2194     }
2195
2196     //
2197     // Try GetDiskFreeSpace first
2198     //
2199     NtStatus = PrivateFile->WinNtThunk->GetDiskFreeSpace (
2200                                           DriveNameFound ? DriveName : NULL,
2201                                           &SectorsPerCluster,
2202                                           &BytesPerSector,
2203                                           &FreeClusters,
2204                                           &TotalClusters
2205                                           );
2206     if (DriveName) {
2207       FreePool (DriveName);
2208     }
2209
2210     if (NtStatus) {
2211       //
2212       // Succeeded
2213       //
2214       BytesPerCluster                   = BytesPerSector * SectorsPerCluster;
2215       FileSystemInfoBuffer->VolumeSize  = MultU64x32 (TotalClusters, BytesPerCluster);
2216       FileSystemInfoBuffer->FreeSpace   = MultU64x32 (FreeClusters, BytesPerCluster);
2217       FileSystemInfoBuffer->BlockSize   = BytesPerCluster;
2218
2219     } else {
2220       //
2221       // try GetDiskFreeSpaceEx then
2222       //
2223       FileSystemInfoBuffer->BlockSize = 0;
2224       NtStatus = PrivateFile->WinNtThunk->GetDiskFreeSpaceEx (
2225                                             PrivateFile->FilePath,
2226                                             (PULARGE_INTEGER) (&FileSystemInfoBuffer->FreeSpace),
2227                                             (PULARGE_INTEGER) (&FileSystemInfoBuffer->VolumeSize),
2228                                             NULL
2229                                             );
2230       if (!NtStatus) {
2231         Status = EFI_DEVICE_ERROR;
2232         goto Done;
2233       }
2234     }
2235
2236     StrCpy ((CHAR16 *) FileSystemInfoBuffer->VolumeLabel, PrivateRoot->VolumeLabel);
2237     *BufferSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel);
2238     Status      = EFI_SUCCESS;
2239   }
2240
2241   if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
2242     if (*BufferSize < StrSize (PrivateRoot->VolumeLabel)) {
2243       *BufferSize = StrSize (PrivateRoot->VolumeLabel);
2244       Status = EFI_BUFFER_TOO_SMALL;
2245       goto Done;
2246     }
2247
2248     StrCpy ((CHAR16 *) Buffer, PrivateRoot->VolumeLabel);
2249     *BufferSize = StrSize (PrivateRoot->VolumeLabel);
2250     Status      = EFI_SUCCESS;
2251   }
2252
2253 Done:
2254   gBS->RestoreTPL (OldTpl);
2255   return Status;
2256 }
2257
2258 EFI_STATUS
2259 EFIAPI
2260 WinNtSimpleFileSystemSetInfo (
2261   IN EFI_FILE         *This,
2262   IN EFI_GUID         *InformationType,
2263   IN UINTN            BufferSize,
2264   IN VOID             *Buffer
2265   )
2266 /*++
2267
2268 Routine Description:
2269
2270   Set information about a file or volume.
2271
2272 Arguments:
2273
2274   This            - Pointer to an opened file handle.
2275
2276   InformationType - GUID identifying the type of information to set.
2277
2278   BufferSize      - Number of bytes of data in the information buffer.
2279
2280   Buffer          - Pointer to the first byte of data in the information buffer.
2281
2282 Returns:
2283
2284   EFI_SUCCESS           - The file or volume information has been updated.
2285
2286   EFI_UNSUPPORTED       - The information identifier is not recognised.
2287
2288   EFI_NO_MEDIA          - The device has no media.
2289
2290   EFI_DEVICE_ERROR      - The device reported an error.
2291
2292   EFI_VOLUME_CORRUPTED  - The file system structures are corrupt.
2293
2294   EFI_WRITE_PROTECTED   - The file, directory, volume, or device is write protected.
2295
2296   EFI_ACCESS_DENIED     - The file was opened read-only.
2297
2298   EFI_VOLUME_FULL       - The volume is full.
2299
2300   EFI_BAD_BUFFER_SIZE   - The buffer size is smaller than the type indicated by InformationType.
2301
2302 --*/
2303 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
2304 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
2305 {
2306   WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE *PrivateRoot;
2307   WIN_NT_EFI_FILE_PRIVATE           *PrivateFile;
2308   EFI_FILE_INFO                     *OldFileInfo;
2309   EFI_FILE_INFO                     *NewFileInfo;
2310   EFI_STATUS                        Status;
2311   UINTN                             OldInfoSize;
2312   INTN                              NtStatus;
2313   UINT32                            NewAttr;
2314   UINT32                            OldAttr;
2315   CHAR16                            *OldFileName;
2316   CHAR16                            *NewFileName;
2317   CHAR16                            *TempFileName;
2318   CHAR16                            *CharPointer;
2319   BOOLEAN                           AttrChangeFlag;
2320   BOOLEAN                           NameChangeFlag;
2321   BOOLEAN                           SizeChangeFlag;
2322   BOOLEAN                           TimeChangeFlag;
2323   UINT64                            CurPos;
2324   SYSTEMTIME                        NewCreationSystemTime;
2325   SYSTEMTIME                        NewLastAccessSystemTime;
2326   SYSTEMTIME                        NewLastWriteSystemTime;
2327   FILETIME                          NewCreationFileTime;
2328   FILETIME                          NewLastAccessFileTime;
2329   FILETIME                          NewLastWriteFileTime;
2330   WIN32_FIND_DATA                   FindBuf;
2331   EFI_FILE_SYSTEM_INFO              *NewFileSystemInfo;
2332   EFI_TPL                           OldTpl;
2333
2334   //
2335   // Check for invalid parameters.
2336   //
2337   if (This == NULL || InformationType == NULL || BufferSize == 0 || Buffer == NULL) {
2338     return EFI_INVALID_PARAMETER;
2339   }
2340
2341   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
2342
2343   //
2344   // Initialise locals.
2345   //
2346   PrivateFile               = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
2347   PrivateRoot               = WIN_NT_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (PrivateFile->SimpleFileSystem);
2348
2349   Status                    = EFI_UNSUPPORTED;
2350   OldFileInfo               = NewFileInfo = NULL;
2351   OldFileName               = NewFileName = NULL;
2352   AttrChangeFlag = NameChangeFlag = SizeChangeFlag = TimeChangeFlag = FALSE;
2353
2354   //
2355   // Set file system information.
2356   //
2357   if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
2358     if (BufferSize < SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel)) {
2359       Status = EFI_BAD_BUFFER_SIZE;
2360       goto Done;
2361     }
2362
2363     NewFileSystemInfo = (EFI_FILE_SYSTEM_INFO *) Buffer;
2364
2365     FreePool (PrivateRoot->VolumeLabel);
2366     PrivateRoot->VolumeLabel = AllocatePool (StrSize (NewFileSystemInfo->VolumeLabel));
2367     if (PrivateRoot->VolumeLabel == NULL) {
2368       Status = EFI_OUT_OF_RESOURCES;
2369       goto Done;
2370     }
2371
2372     StrCpy (PrivateRoot->VolumeLabel, NewFileSystemInfo->VolumeLabel);
2373
2374     Status = EFI_SUCCESS;
2375     goto Done;
2376   }
2377
2378   //
2379   // Set volume label information.
2380   //
2381   if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
2382     if (BufferSize < StrSize (PrivateRoot->VolumeLabel)) {
2383       Status = EFI_BAD_BUFFER_SIZE;
2384       goto Done;
2385     }
2386
2387     StrCpy (PrivateRoot->VolumeLabel, (CHAR16 *) Buffer);
2388
2389     Status = EFI_SUCCESS;
2390     goto Done;
2391   }
2392
2393   if (!CompareGuid (InformationType, &gEfiFileInfoGuid)) {
2394     Status = EFI_UNSUPPORTED;
2395     goto Done;
2396   }
2397
2398   if (BufferSize < SIZE_OF_EFI_FILE_INFO) {
2399     Status = EFI_BAD_BUFFER_SIZE;
2400     goto Done;
2401   }
2402
2403   //
2404   // Set file/directory information.
2405   //
2406
2407   //
2408   // Check for invalid set file information parameters.
2409   //
2410   NewFileInfo = (EFI_FILE_INFO *) Buffer;
2411
2412   if (NewFileInfo->Size <= sizeof (EFI_FILE_INFO) ||
2413       (NewFileInfo->Attribute &~(EFI_FILE_VALID_ATTR)) ||
2414       (sizeof (UINTN) == 4 && NewFileInfo->Size > 0xFFFFFFFF)
2415       ) {
2416     Status = EFI_INVALID_PARAMETER;
2417     goto Done;
2418   }
2419
2420   //
2421   // bugbug: - This is not safe.  We need something like EfiStrMaxSize()
2422   // that would have an additional parameter that would be the size
2423   // of the string array just in case there are no NULL characters in
2424   // the string array.
2425   //
2426   //
2427   // Get current file information so we can determine what kind
2428   // of change request this is.
2429   //
2430   OldInfoSize = 0;
2431   Status      = WinNtSimpleFileSystemFileInfo (PrivateFile, &OldInfoSize, NULL);
2432
2433   if (Status != EFI_BUFFER_TOO_SMALL) {
2434     Status = EFI_DEVICE_ERROR;
2435     goto Done;
2436   }
2437
2438   OldFileInfo = AllocatePool (OldInfoSize);
2439   if (OldFileInfo == NULL) {
2440     Status = EFI_OUT_OF_RESOURCES;
2441     goto Done;
2442   }
2443
2444   Status = WinNtSimpleFileSystemFileInfo (PrivateFile, &OldInfoSize, OldFileInfo);
2445
2446   if (EFI_ERROR (Status)) {
2447     goto Done;
2448   }
2449
2450   OldFileName = AllocatePool (StrSize (PrivateFile->FileName));
2451   if (OldFileName == NULL) {
2452     Status = EFI_OUT_OF_RESOURCES;
2453     goto Done;
2454   }
2455
2456   StrCpy (OldFileName, PrivateFile->FileName);
2457
2458   //
2459   // Make full pathname from new filename and rootpath.
2460   //
2461   if (NewFileInfo->FileName[0] == '\\') {
2462     NewFileName = AllocatePool (StrSize (PrivateRoot->FilePath) + StrSize (L"\\") + StrSize (NewFileInfo->FileName));
2463     if (NewFileName == NULL) {
2464       Status = EFI_OUT_OF_RESOURCES;
2465       goto Done;
2466     }
2467
2468     StrCpy (NewFileName, PrivateRoot->FilePath);
2469     StrCat (NewFileName, L"\\");
2470     StrCat (NewFileName, NewFileInfo->FileName + 1);
2471   } else {
2472     NewFileName = AllocatePool (StrSize (PrivateFile->FilePath) + StrSize (L"\\") + StrSize (NewFileInfo->FileName));
2473     if (NewFileName == NULL) {
2474       Status = EFI_OUT_OF_RESOURCES;
2475       goto Done;
2476     }
2477
2478     StrCpy (NewFileName, PrivateFile->FilePath);
2479     StrCat (NewFileName, L"\\");
2480     StrCat (NewFileName, NewFileInfo->FileName);
2481   }
2482
2483   //
2484   // Is there an attribute change request?
2485   //
2486   if (NewFileInfo->Attribute != OldFileInfo->Attribute) {
2487     if ((NewFileInfo->Attribute & EFI_FILE_DIRECTORY) != (OldFileInfo->Attribute & EFI_FILE_DIRECTORY)) {
2488       Status = EFI_INVALID_PARAMETER;
2489       goto Done;
2490     }
2491
2492     AttrChangeFlag = TRUE;
2493   }
2494
2495   //
2496   // Is there a name change request?
2497   // bugbug: - Need EfiStrCaseCmp()
2498   //
2499   if (StrCmp (NewFileInfo->FileName, OldFileInfo->FileName)) {
2500     NameChangeFlag = TRUE;
2501   }
2502
2503   //
2504   // Is there a size change request?
2505   //
2506   if (NewFileInfo->FileSize != OldFileInfo->FileSize) {
2507     SizeChangeFlag = TRUE;
2508   }
2509
2510   //
2511   // Is there a time stamp change request?
2512   //
2513   if (!IsZero (&NewFileInfo->CreateTime, sizeof (EFI_TIME)) &&
2514       CompareMem (&NewFileInfo->CreateTime, &OldFileInfo->CreateTime, sizeof (EFI_TIME))
2515         ) {
2516     TimeChangeFlag = TRUE;
2517   } else if (!IsZero (&NewFileInfo->LastAccessTime, sizeof (EFI_TIME)) &&
2518            CompareMem (&NewFileInfo->LastAccessTime, &OldFileInfo->LastAccessTime, sizeof (EFI_TIME))
2519             ) {
2520     TimeChangeFlag = TRUE;
2521   } else if (!IsZero (&NewFileInfo->ModificationTime, sizeof (EFI_TIME)) &&
2522            CompareMem (&NewFileInfo->ModificationTime, &OldFileInfo->ModificationTime, sizeof (EFI_TIME))
2523             ) {
2524     TimeChangeFlag = TRUE;
2525   }
2526
2527   //
2528   // All done if there are no change requests being made.
2529   //
2530   if (!(AttrChangeFlag || NameChangeFlag || SizeChangeFlag || TimeChangeFlag)) {
2531     Status = EFI_SUCCESS;
2532     goto Done;
2533   }
2534
2535   //
2536   // Set file or directory information.
2537   //
2538   OldAttr = PrivateFile->WinNtThunk->GetFileAttributes (OldFileName);
2539
2540   //
2541   // Name change.
2542   //
2543   if (NameChangeFlag) {
2544     //
2545     // Close the handles first
2546     //
2547     if (PrivateFile->IsOpenedByRead) {
2548       Status = EFI_ACCESS_DENIED;
2549       goto Done;
2550     }
2551
2552     for (CharPointer = NewFileName; *CharPointer != 0 && *CharPointer != L'/'; CharPointer++) {
2553     }
2554
2555     if (*CharPointer != 0) {
2556       Status = EFI_ACCESS_DENIED;
2557       goto Done;
2558     }
2559
2560     if (PrivateFile->LHandle != INVALID_HANDLE_VALUE) {
2561       if (PrivateFile->IsDirectoryPath) {
2562         PrivateFile->WinNtThunk->FindClose (PrivateFile->LHandle);
2563       } else {
2564         PrivateFile->WinNtThunk->CloseHandle (PrivateFile->LHandle);
2565         PrivateFile->LHandle = INVALID_HANDLE_VALUE;
2566       }
2567     }
2568
2569     if (PrivateFile->IsDirectoryPath && PrivateFile->DirHandle != INVALID_HANDLE_VALUE) {
2570       PrivateFile->WinNtThunk->CloseHandle (PrivateFile->DirHandle);
2571       PrivateFile->DirHandle = INVALID_HANDLE_VALUE;
2572     }
2573
2574     NtStatus = PrivateFile->WinNtThunk->MoveFile (OldFileName, NewFileName);
2575
2576     if (NtStatus) {
2577       //
2578       // modify file name
2579       //
2580       FreePool (PrivateFile->FileName);
2581
2582       PrivateFile->FileName = AllocatePool (StrSize (NewFileName));
2583       if (PrivateFile->FileName == NULL) {
2584         Status = EFI_OUT_OF_RESOURCES;
2585         goto Done;
2586       }
2587
2588       StrCpy (PrivateFile->FileName, NewFileName);
2589
2590       TempFileName = AllocatePool (StrSize (NewFileName) + StrSize (L"\\*"));
2591
2592       StrCpy (TempFileName, NewFileName);
2593
2594       if (!PrivateFile->IsDirectoryPath) {
2595        PrivateFile->LHandle = PrivateFile->WinNtThunk->CreateFile (
2596                                                           TempFileName,
2597                                                           PrivateFile->IsOpenedByRead ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
2598                                                           FILE_SHARE_READ | FILE_SHARE_WRITE,
2599                                                           NULL,
2600                                                           OPEN_EXISTING,
2601                                                           0,
2602                                                           NULL
2603                                                           );
2604
2605         FreePool (TempFileName);
2606
2607         //
2608         //  Flush buffers just in case
2609         //
2610         if (PrivateFile->WinNtThunk->FlushFileBuffers (PrivateFile->LHandle) == 0) {
2611           Status = EFI_DEVICE_ERROR;
2612           goto Done;
2613         }
2614       } else {
2615         PrivateFile->DirHandle = PrivateFile->WinNtThunk->CreateFile (
2616                                                             TempFileName,
2617                                                             PrivateFile->IsOpenedByRead ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
2618                                                             FILE_SHARE_READ | FILE_SHARE_WRITE,
2619                                                             NULL,
2620                                                             OPEN_EXISTING,
2621                                                             FILE_FLAG_BACKUP_SEMANTICS,
2622                                                             NULL
2623                                                             );
2624
2625         StrCat (TempFileName, L"\\*");
2626         PrivateFile->LHandle = PrivateFile->WinNtThunk->FindFirstFile (TempFileName, &FindBuf);
2627
2628         FreePool (TempFileName);
2629       }
2630     } else {
2631 Reopen: ;
2632       Status    = EFI_DEVICE_ERROR;
2633
2634       NtStatus  = PrivateFile->WinNtThunk->SetFileAttributes (OldFileName, OldAttr);
2635
2636       if (!NtStatus) {
2637         goto Done;
2638       }
2639
2640       TempFileName = AllocatePool (StrSize (OldFileName) + StrSize (L"\\*"));
2641
2642       StrCpy (TempFileName, OldFileName);
2643
2644       if (!PrivateFile->IsDirectoryPath) {
2645         PrivateFile->LHandle = PrivateFile->WinNtThunk->CreateFile (
2646                                                           TempFileName,
2647                                                           PrivateFile->IsOpenedByRead ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
2648                                                           FILE_SHARE_READ | FILE_SHARE_WRITE,
2649                                                           NULL,
2650                                                           OPEN_EXISTING,
2651                                                           0,
2652                                                           NULL
2653                                                           );
2654       } else {
2655         PrivateFile->DirHandle = PrivateFile->WinNtThunk->CreateFile (
2656                                                             TempFileName,
2657                                                             PrivateFile->IsOpenedByRead ? GENERIC_READ : GENERIC_READ | GENERIC_WRITE,
2658                                                             FILE_SHARE_READ | FILE_SHARE_WRITE,
2659                                                             NULL,
2660                                                             OPEN_EXISTING,
2661                                                             FILE_FLAG_BACKUP_SEMANTICS,
2662                                                             NULL
2663                                                             );
2664
2665         StrCat (TempFileName, L"\\*");
2666         PrivateFile->LHandle = PrivateFile->WinNtThunk->FindFirstFile (TempFileName, &FindBuf);
2667       }
2668
2669       FreePool (TempFileName);
2670
2671       goto Done;
2672
2673     }
2674   }
2675
2676   //
2677   //  Size change
2678   //
2679   if (SizeChangeFlag) {
2680     if (PrivateFile->IsDirectoryPath) {
2681       Status = EFI_UNSUPPORTED;
2682       goto Done;
2683     }
2684
2685     if (PrivateFile->IsOpenedByRead || OldFileInfo->Attribute & EFI_FILE_READ_ONLY) {
2686       Status = EFI_ACCESS_DENIED;
2687       goto Done;
2688     }
2689
2690     Status = This->GetPosition (This, &CurPos);
2691     if (EFI_ERROR (Status)) {
2692       goto Done;
2693     }
2694
2695     Status = This->SetPosition (This, NewFileInfo->FileSize);
2696     if (EFI_ERROR (Status)) {
2697       goto Done;
2698     }
2699
2700     if (PrivateFile->WinNtThunk->SetEndOfFile (PrivateFile->LHandle) == 0) {
2701       Status = EFI_DEVICE_ERROR;
2702       goto Done;
2703     }
2704
2705     Status = This->SetPosition (This, CurPos);
2706     if (EFI_ERROR (Status)) {
2707       goto Done;
2708     }
2709   }
2710
2711   //
2712   // Time change
2713   //
2714   if (TimeChangeFlag) {
2715
2716     NewCreationSystemTime.wYear         = NewFileInfo->CreateTime.Year;
2717     NewCreationSystemTime.wMonth        = NewFileInfo->CreateTime.Month;
2718     NewCreationSystemTime.wDay          = NewFileInfo->CreateTime.Day;
2719     NewCreationSystemTime.wHour         = NewFileInfo->CreateTime.Hour;
2720     NewCreationSystemTime.wMinute       = NewFileInfo->CreateTime.Minute;
2721     NewCreationSystemTime.wSecond       = NewFileInfo->CreateTime.Second;
2722     NewCreationSystemTime.wMilliseconds = 0;
2723
2724     if (!PrivateFile->WinNtThunk->SystemTimeToFileTime (
2725                                     &NewCreationSystemTime,
2726                                     &NewCreationFileTime
2727                                     )) {
2728       goto Done;
2729     }
2730
2731     NewLastAccessSystemTime.wYear         = NewFileInfo->LastAccessTime.Year;
2732     NewLastAccessSystemTime.wMonth        = NewFileInfo->LastAccessTime.Month;
2733     NewLastAccessSystemTime.wDay          = NewFileInfo->LastAccessTime.Day;
2734     NewLastAccessSystemTime.wHour         = NewFileInfo->LastAccessTime.Hour;
2735     NewLastAccessSystemTime.wMinute       = NewFileInfo->LastAccessTime.Minute;
2736     NewLastAccessSystemTime.wSecond       = NewFileInfo->LastAccessTime.Second;
2737     NewLastAccessSystemTime.wMilliseconds = 0;
2738
2739     if (!PrivateFile->WinNtThunk->SystemTimeToFileTime (
2740                                     &NewLastAccessSystemTime,
2741                                     &NewLastAccessFileTime
2742                                     )) {
2743       goto Done;
2744     }
2745
2746     NewLastWriteSystemTime.wYear          = NewFileInfo->ModificationTime.Year;
2747     NewLastWriteSystemTime.wMonth         = NewFileInfo->ModificationTime.Month;
2748     NewLastWriteSystemTime.wDay           = NewFileInfo->ModificationTime.Day;
2749     NewLastWriteSystemTime.wHour          = NewFileInfo->ModificationTime.Hour;
2750     NewLastWriteSystemTime.wMinute        = NewFileInfo->ModificationTime.Minute;
2751     NewLastWriteSystemTime.wSecond        = NewFileInfo->ModificationTime.Second;
2752     NewLastWriteSystemTime.wMilliseconds  = 0;
2753
2754     if (!PrivateFile->WinNtThunk->SystemTimeToFileTime (
2755                                     &NewLastWriteSystemTime,
2756                                     &NewLastWriteFileTime
2757                                     )) {
2758       goto Done;
2759     }
2760
2761     if (!PrivateFile->WinNtThunk->SetFileTime (
2762                                     PrivateFile->IsDirectoryPath ? PrivateFile->DirHandle : PrivateFile->LHandle,
2763                                     &NewCreationFileTime,
2764                                     &NewLastAccessFileTime,
2765                                     &NewLastWriteFileTime
2766                                     )) {
2767       Status = EFI_DEVICE_ERROR;
2768       goto Done;
2769     }
2770
2771   }
2772
2773   //
2774   // No matter about AttrChangeFlag, Attribute must be set.
2775   // Because operation before may cause attribute change.
2776   //
2777   NewAttr = OldAttr;
2778
2779   if (NewFileInfo->Attribute & EFI_FILE_ARCHIVE) {
2780     NewAttr |= FILE_ATTRIBUTE_ARCHIVE;
2781   } else {
2782     NewAttr &= ~FILE_ATTRIBUTE_ARCHIVE;
2783   }
2784
2785   if (NewFileInfo->Attribute & EFI_FILE_HIDDEN) {
2786     NewAttr |= FILE_ATTRIBUTE_HIDDEN;
2787   } else {
2788     NewAttr &= ~FILE_ATTRIBUTE_HIDDEN;
2789   }
2790
2791   if (NewFileInfo->Attribute & EFI_FILE_SYSTEM) {
2792     NewAttr |= FILE_ATTRIBUTE_SYSTEM;
2793   } else {
2794     NewAttr &= ~FILE_ATTRIBUTE_SYSTEM;
2795   }
2796
2797   if (NewFileInfo->Attribute & EFI_FILE_READ_ONLY) {
2798     NewAttr |= FILE_ATTRIBUTE_READONLY;
2799   } else {
2800     NewAttr &= ~FILE_ATTRIBUTE_READONLY;
2801   }
2802
2803   NtStatus = PrivateFile->WinNtThunk->SetFileAttributes (NewFileName, NewAttr);
2804
2805   if (!NtStatus) {
2806     goto Reopen;
2807   }
2808
2809 Done:
2810   if (OldFileInfo != NULL) {
2811     FreePool (OldFileInfo);
2812   }
2813
2814   if (OldFileName != NULL) {
2815     FreePool (OldFileName);
2816   }
2817
2818   if (NewFileName != NULL) {
2819     FreePool (NewFileName);
2820   }
2821
2822   gBS->RestoreTPL (OldTpl);
2823   return Status;
2824 }
2825
2826 EFI_STATUS
2827 EFIAPI
2828 WinNtSimpleFileSystemFlush (
2829   IN EFI_FILE  *This
2830   )
2831 /*++
2832
2833 Routine Description:
2834
2835   Flush all modified data to the media.
2836
2837 Arguments:
2838
2839   This  - Pointer to an opened file handle.
2840
2841 Returns:
2842
2843   EFI_SUCCESS           - The data has been flushed.
2844
2845   EFI_NO_MEDIA          - The device has no media.
2846
2847   EFI_DEVICE_ERROR      - The device reported an error.
2848
2849   EFI_VOLUME_CORRUPTED  - The file system structures have been corrupted.
2850
2851   EFI_WRITE_PROTECTED   - The file, directory, volume, or device is write protected.
2852
2853   EFI_ACCESS_DENIED     - The file was opened read-only.
2854
2855   EFI_VOLUME_FULL       - The volume is full.
2856
2857 --*/
2858 // TODO:    EFI_INVALID_PARAMETER - add return value to function comment
2859 {
2860   BY_HANDLE_FILE_INFORMATION  FileInfo;
2861   WIN_NT_EFI_FILE_PRIVATE     *PrivateFile;
2862   EFI_STATUS                  Status;
2863   EFI_TPL                     OldTpl;
2864
2865   if (This == NULL) {
2866     return EFI_INVALID_PARAMETER;
2867   }
2868
2869   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
2870
2871   PrivateFile = WIN_NT_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
2872
2873   if (PrivateFile->LHandle == INVALID_HANDLE_VALUE) {
2874     Status = EFI_DEVICE_ERROR;
2875     goto Done;
2876   }
2877
2878   if (PrivateFile->IsDirectoryPath) {
2879     Status = EFI_SUCCESS;
2880     goto Done;
2881   }
2882
2883   if (PrivateFile->IsOpenedByRead) {
2884     Status = EFI_ACCESS_DENIED;
2885     goto Done;
2886   }
2887
2888   PrivateFile->WinNtThunk->GetFileInformationByHandle (PrivateFile->LHandle, &FileInfo);
2889
2890   if (FileInfo.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
2891     Status = EFI_ACCESS_DENIED;
2892     goto Done;
2893   }
2894
2895   Status = PrivateFile->WinNtThunk->FlushFileBuffers (PrivateFile->LHandle) ? EFI_SUCCESS : EFI_DEVICE_ERROR;
2896
2897 Done:
2898   gBS->RestoreTPL (OldTpl);
2899   return Status;
2900   //
2901   // bugbug: - Use Windows error reporting.
2902   //
2903 }
2904
2905