MdeModulePkg/Universal/Disk/UdfDxe/Udf.h

   1 /** @file
   2   UDF/ECMA-167 file system driver.
   3
   4   Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
   5
   6   This program and the accompanying materials are licensed and made available
   7   under the terms and conditions of the BSD License which accompanies this
   8   distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
  12   WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 **/
  14
  15 #ifndef _UDF_H_
  16 #define _UDF_H_
  17
  18 #include <Uefi.h>
  19 #include <Base.h>
  20
  21 #include <Protocol/BlockIo.h>
  22 #include <Protocol/ComponentName.h>
  23 #include <Protocol/DevicePath.h>
  24 #include <Protocol/DriverBinding.h>
  25 #include <Protocol/DiskIo.h>
  26 #include <Protocol/SimpleFileSystem.h>
  27
  28 #include <Guid/FileInfo.h>
  29 #include <Guid/FileSystemInfo.h>
  30 #include <Guid/FileSystemVolumeLabelInfo.h>
  31
  32 #include <Library/DebugLib.h>
  33 #include <Library/UefiDriverEntryPoint.h>
  34 #include <Library/BaseLib.h>
  35 #include <Library/UefiLib.h>
  36 #include <Library/BaseMemoryLib.h>
  37 #include <Library/MemoryAllocationLib.h>
  38 #include <Library/UefiBootServicesTableLib.h>
  39 #include <Library/DevicePathLib.h>
  40
  41 #include <IndustryStandard/ElTorito.h>
  42 #include <IndustryStandard/Udf.h>
  43
  44 //
  45 // C5BD4D42-1A76-4996-8956-73CDA326CD0A
  46 //
  47 #define EFI_UDF_DEVICE_PATH_GUID                        \
  48   { 0xC5BD4D42, 0x1A76, 0x4996,                         \
  49     { 0x89, 0x56, 0x73, 0xCD, 0xA3, 0x26, 0xCD, 0x0A }  \
  50   }
  51
  52 #define UDF_DEFAULT_LV_NUM 0
  53
  54 #define IS_PVD(_Pointer) \
  55   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 1))
  56 #define IS_PD(_Pointer) \
  57   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 5))
  58 #define IS_LVD(_Pointer) \
  59   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 6))
  60 #define IS_TD(_Pointer) \
  61   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 8))
  62 #define IS_FSD(_Pointer) \
  63   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 256))
  64 #define IS_FE(_Pointer) \
  65   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 261))
  66 #define IS_EFE(_Pointer) \
  67   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 266))
  68 #define IS_FID(_Pointer) \
  69   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 257))
  70 #define IS_AED(_Pointer) \
  71   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 258))
  72 #define IS_LVID(_Pointer) \
  73   ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 9))
  74
  75 #define _GET_FILETYPE(_Pointer) \
  76   (IS_FE (_Pointer) ? \
  77    (((UDF_FILE_ENTRY *)(_Pointer))->IcbTag.FileType) \
  78    : \
  79    (((UDF_EXTENDED_FILE_ENTRY *)(_Pointer))->IcbTag.FileType))
  80
  81 #define IS_FE_DIRECTORY(_Pointer) \
  82   ((BOOLEAN)(_GET_FILETYPE (_Pointer) == 4))
  83 #define IS_FE_STANDARD_FILE(_Pointer) \
  84   ((BOOLEAN)(_GET_FILETYPE (_Pointer) == 5))
  85 #define IS_FE_SYMLINK(_Pointer) \
  86   ((BOOLEAN)(_GET_FILETYPE (_Pointer) == 12))
  87
  88 #define HIDDEN_FILE     (1 << 0)
  89 #define DIRECTORY_FILE  (1 << 1)
  90 #define DELETED_FILE    (1 << 2)
  91 #define PARENT_FILE     (1 << 3)
  92
  93 #define _GET_FILE_CHARS(_Pointer) \
  94   (((UDF_FILE_IDENTIFIER_DESCRIPTOR *)(_Pointer))->FileCharacteristics)
  95
  96 #define IS_FID_HIDDEN_FILE(_Pointer) \
  97   ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & HIDDEN_FILE))
  98 #define IS_FID_DIRECTORY_FILE(_Pointer) \
  99   ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & DIRECTORY_FILE))
 100 #define IS_FID_DELETED_FILE(_Pointer) \
 101   ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & DELETED_FILE))
 102 #define IS_FID_PARENT_FILE(_Pointer) \
 103   ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & PARENT_FILE))
 104 #define IS_FID_NORMAL_FILE(_Pointer) \
 105   ((BOOLEAN)(!IS_FID_DIRECTORY_FILE (_Pointer) && \
 106          !IS_FID_PARENT_FILE (_Pointer)))
 107
 108 typedef enum {
 109   SHORT_ADS_SEQUENCE,
 110   LONG_ADS_SEQUENCE,
 111   EXTENDED_ADS_SEQUENCE,
 112   INLINE_DATA
 113 } UDF_FE_RECORDING_FLAGS;
 114
 115 #define GET_FE_RECORDING_FLAGS(_Fe) \
 116   ((UDF_FE_RECORDING_FLAGS)((UDF_ICB_TAG *)( \
 117                   (UINT8 *)(_Fe) + \
 118                   sizeof (UDF_DESCRIPTOR_TAG)))->Flags & 0x07)
 119
 120 typedef enum {
 121   EXTENT_RECORDED_AND_ALLOCATED,
 122   EXTENT_NOT_RECORDED_BUT_ALLOCATED,
 123   EXTENT_NOT_RECORDED_NOT_ALLOCATED,
 124   EXTENT_IS_NEXT_EXTENT,
 125 } UDF_EXTENT_FLAGS;
 126
 127 #define AD_LENGTH(_RecFlags) \
 128   ((_RecFlags) == SHORT_ADS_SEQUENCE ? \
 129    ((UINT64)(sizeof (UDF_SHORT_ALLOCATION_DESCRIPTOR))) : \
 130    ((UINT64)(sizeof (UDF_LONG_ALLOCATION_DESCRIPTOR))))
 131
 132 #define GET_EXTENT_FLAGS(_RecFlags, _Ad) \
 133   ((_RecFlags) == SHORT_ADS_SEQUENCE ? \
 134    ((UDF_EXTENT_FLAGS)((((UDF_SHORT_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength >> \
 135             30) & 0x3)) : \
 136    ((UDF_EXTENT_FLAGS)((((UDF_LONG_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength >> \
 137             30) & 0x3)))
 138
 139 #define GET_EXTENT_LENGTH(_RecFlags, _Ad) \
 140   ((_RecFlags) == SHORT_ADS_SEQUENCE ? \
 141    ((UINT32)((((UDF_SHORT_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength & \
 142           ~0xC0000000UL))) : \
 143    ((UINT32)((((UDF_LONG_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength & \
 144           ~0xC0000000UL))))
 145
 146 #define UDF_FILENAME_LENGTH  128
 147 #define UDF_PATH_LENGTH      512
 148
 149 #define GET_FID_FROM_ADS(_Data, _Offs) \
 150   ((UDF_FILE_IDENTIFIER_DESCRIPTOR *)((UINT8 *)(_Data) + (_Offs)))
 151
 152 #define IS_VALID_COMPRESSION_ID(_CompId) \
 153   ((BOOLEAN)((_CompId) == 8 || (_CompId) == 16))
 154
 155 #define LV_BLOCK_SIZE(_Vol, _LvNum) \
 156   (_Vol)->LogicalVolDescs[(_LvNum)]->LogicalBlockSize
 157
 158 #define UDF_STANDARD_IDENTIFIER_LENGTH   5
 159
 160 #define LV_UDF_REVISION(_Lv) \
 161   *(UINT16 *)(UINTN)(_Lv)->DomainIdentifier.IdentifierSuffix
 162
 163 #pragma pack(1)
 164
 165 typedef struct {
 166   UINT8 StandardIdentifier[UDF_STANDARD_IDENTIFIER_LENGTH];
 167 } UDF_STANDARD_IDENTIFIER;
 168
 169 #pragma pack()
 170
 171 typedef enum {
 172   READ_FILE_GET_FILESIZE,
 173   READ_FILE_ALLOCATE_AND_READ,
 174   READ_FILE_SEEK_AND_READ,
 175 } UDF_READ_FILE_FLAGS;
 176
 177 typedef struct {
 178   VOID                 *FileData;
 179   UDF_READ_FILE_FLAGS  Flags;
 180   UINT64               FileDataSize;
 181   UINT64               FilePosition;
 182   UINT64               FileSize;
 183   UINT64               ReadLength;
 184 } UDF_READ_FILE_INFO;
 185
 186 #pragma pack(1)
 187
 188 typedef struct {
 189   UINT8           CharacterSetType;
 190   UINT8           CharacterSetInfo[63];
 191 } UDF_CHAR_SPEC;
 192
 193 typedef struct {
 194   UINT8           Flags;
 195   UINT8           Identifier[23];
 196   UINT8           IdentifierSuffix[8];
 197 } UDF_ENTITY_ID;
 198
 199 typedef struct {
 200   UINT16          TypeAndTimezone;
 201   INT16           Year;
 202   UINT8           Month;
 203   UINT8           Day;
 204   UINT8           Hour;
 205   UINT8           Minute;
 206   UINT8           Second;
 207   UINT8           Centiseconds;
 208   UINT8           HundredsOfMicroseconds;
 209   UINT8           Microseconds;
 210 } UDF_TIMESTAMP;
 211
 212 typedef struct {
 213   UINT32        LogicalBlockNumber;
 214   UINT16        PartitionReferenceNumber;
 215 } UDF_LB_ADDR;
 216
 217 typedef struct {
 218   UINT32                           ExtentLength;
 219   UDF_LB_ADDR                      ExtentLocation;
 220   UINT8                            ImplementationUse[6];
 221 } UDF_LONG_ALLOCATION_DESCRIPTOR;
 222
 223 typedef struct {
 224   UDF_DESCRIPTOR_TAG                 DescriptorTag;
 225   UINT32                             PrevAllocationExtentDescriptor;
 226   UINT32                             LengthOfAllocationDescriptors;
 227 } UDF_ALLOCATION_EXTENT_DESCRIPTOR;
 228
 229 typedef struct {
 230   UINT8                   StructureType;
 231   UINT8                   StandardIdentifier[UDF_STANDARD_IDENTIFIER_LENGTH];
 232   UINT8                   StructureVersion;
 233   UINT8                   Reserved;
 234   UINT8                   StructureData[2040];
 235 } UDF_VOLUME_DESCRIPTOR;
 236
 237 typedef struct {
 238   UDF_DESCRIPTOR_TAG         DescriptorTag;
 239   UINT32                     VolumeDescriptorSequenceNumber;
 240   UINT16                     PartitionFlags;
 241   UINT16                     PartitionNumber;
 242   UDF_ENTITY_ID              PartitionContents;
 243   UINT8                      PartitionContentsUse[128];
 244   UINT32                     AccessType;
 245   UINT32                     PartitionStartingLocation;
 246   UINT32                     PartitionLength;
 247   UDF_ENTITY_ID              ImplementationIdentifier;
 248   UINT8                      ImplementationUse[128];
 249   UINT8                      Reserved[156];
 250 } UDF_PARTITION_DESCRIPTOR;
 251
 252 typedef struct {
 253   UDF_DESCRIPTOR_TAG              DescriptorTag;
 254   UINT32                          VolumeDescriptorSequenceNumber;
 255   UDF_CHAR_SPEC                   DescriptorCharacterSet;
 256   UINT8                           LogicalVolumeIdentifier[128];
 257   UINT32                          LogicalBlockSize;
 258   UDF_ENTITY_ID                   DomainIdentifier;
 259   UDF_LONG_ALLOCATION_DESCRIPTOR  LogicalVolumeContentsUse;
 260   UINT32                          MapTableLength;
 261   UINT32                          NumberOfPartitionMaps;
 262   UDF_ENTITY_ID                   ImplementationIdentifier;
 263   UINT8                           ImplementationUse[128];
 264   UDF_EXTENT_AD                   IntegritySequenceExtent;
 265   UINT8                           PartitionMaps[6];
 266 } UDF_LOGICAL_VOLUME_DESCRIPTOR;
 267
 268 typedef struct {
 269   UDF_DESCRIPTOR_TAG             DescriptorTag;
 270   UDF_TIMESTAMP                  RecordingDateTime;
 271   UINT32                         IntegrityType;
 272   UDF_EXTENT_AD                  NextIntegrityExtent;
 273   UINT8                          LogicalVolumeContentsUse[32];
 274   UINT32                         NumberOfPartitions;
 275   UINT32                         LengthOfImplementationUse;
 276   UINT8                          Data[0];
 277 } UDF_LOGICAL_VOLUME_INTEGRITY;
 278
 279 typedef struct {
 280   UDF_DESCRIPTOR_TAG              DescriptorTag;
 281   UDF_TIMESTAMP                   RecordingDateAndTime;
 282   UINT16                          InterchangeLevel;
 283   UINT16                          MaximumInterchangeLevel;
 284   UINT32                          CharacterSetList;
 285   UINT32                          MaximumCharacterSetList;
 286   UINT32                          FileSetNumber;
 287   UINT32                          FileSetDescriptorNumber;
 288   UDF_CHAR_SPEC                   LogicalVolumeIdentifierCharacterSet;
 289   UINT8                           LogicalVolumeIdentifier[128];
 290   UDF_CHAR_SPEC                   FileSetCharacterSet;
 291   UINT8                           FileSetIdentifier[32];
 292   UINT8                           CopyrightFileIdentifier[32];
 293   UINT8                           AbstractFileIdentifier[32];
 294   UDF_LONG_ALLOCATION_DESCRIPTOR  RootDirectoryIcb;
 295   UDF_ENTITY_ID                   DomainIdentifier;
 296   UDF_LONG_ALLOCATION_DESCRIPTOR  NextExtent;
 297   UDF_LONG_ALLOCATION_DESCRIPTOR  SystemStreamDirectoryIcb;
 298   UINT8                           Reserved[32];
 299 } UDF_FILE_SET_DESCRIPTOR;
 300
 301 typedef struct {
 302   UINT32                            ExtentLength;
 303   UINT32                            ExtentPosition;
 304 } UDF_SHORT_ALLOCATION_DESCRIPTOR;
 305
 306 typedef struct {
 307   UDF_DESCRIPTOR_TAG               DescriptorTag;
 308   UINT16                           FileVersionNumber;
 309   UINT8                            FileCharacteristics;
 310   UINT8                            LengthOfFileIdentifier;
 311   UDF_LONG_ALLOCATION_DESCRIPTOR   Icb;
 312   UINT16                           LengthOfImplementationUse;
 313   UINT8                            Data[0];
 314 } UDF_FILE_IDENTIFIER_DESCRIPTOR;
 315
 316 typedef struct {
 317   UINT32        PriorRecordNumberOfDirectEntries;
 318   UINT16        StrategyType;
 319   UINT16        StrategyParameter;
 320   UINT16        MaximumNumberOfEntries;
 321   UINT8         Reserved;
 322   UINT8         FileType;
 323   UDF_LB_ADDR   ParentIcbLocation;
 324   UINT16        Flags;
 325 } UDF_ICB_TAG;
 326
 327 typedef struct {
 328   UDF_DESCRIPTOR_TAG              DescriptorTag;
 329   UDF_ICB_TAG                     IcbTag;
 330   UINT32                          Uid;
 331   UINT32                          Gid;
 332   UINT32                          Permissions;
 333   UINT16                          FileLinkCount;
 334   UINT8                           RecordFormat;
 335   UINT8                           RecordDisplayAttributes;
 336   UINT32                          RecordLength;
 337   UINT64                          InformationLength;
 338   UINT64                          LogicalBlocksRecorded;
 339   UDF_TIMESTAMP                   AccessTime;
 340   UDF_TIMESTAMP                   ModificationTime;
 341   UDF_TIMESTAMP                   AttributeTime;
 342   UINT32                          CheckPoint;
 343   UDF_LONG_ALLOCATION_DESCRIPTOR  ExtendedAttributeIcb;
 344   UDF_ENTITY_ID                   ImplementationIdentifier;
 345   UINT64                          UniqueId;
 346   UINT32                          LengthOfExtendedAttributes;
 347   UINT32                          LengthOfAllocationDescriptors;
 348   UINT8                           Data[0]; // L_EA + L_AD
 349 } UDF_FILE_ENTRY;
 350
 351 typedef struct {
 352   UDF_DESCRIPTOR_TAG              DescriptorTag;
 353   UDF_ICB_TAG                     IcbTag;
 354   UINT32                          Uid;
 355   UINT32                          Gid;
 356   UINT32                          Permissions;
 357   UINT16                          FileLinkCount;
 358   UINT8                           RecordFormat;
 359   UINT8                           RecordDisplayAttributes;
 360   UINT32                          RecordLength;
 361   UINT64                          InformationLength;
 362   UINT64                          ObjectSize;
 363   UINT64                          LogicalBlocksRecorded;
 364   UDF_TIMESTAMP                   AccessTime;
 365   UDF_TIMESTAMP                   ModificationTime;
 366   UDF_TIMESTAMP                   CreationTime;
 367   UDF_TIMESTAMP                   AttributeTime;
 368   UINT32                          CheckPoint;
 369   UINT32                          Reserved;
 370   UDF_LONG_ALLOCATION_DESCRIPTOR  ExtendedAttributeIcb;
 371   UDF_LONG_ALLOCATION_DESCRIPTOR  StreamDirectoryIcb;
 372   UDF_ENTITY_ID                   ImplementationIdentifier;
 373   UINT64                          UniqueId;
 374   UINT32                          LengthOfExtendedAttributes;
 375   UINT32                          LengthOfAllocationDescriptors;
 376   UINT8                           Data[0]; // L_EA + L_AD
 377 } UDF_EXTENDED_FILE_ENTRY;
 378
 379 typedef struct {
 380   UINT8                ComponentType;
 381   UINT8                LengthOfComponentIdentifier;
 382   UINT16               ComponentFileVersionNumber;
 383   UINT8                ComponentIdentifier[0];
 384 } UDF_PATH_COMPONENT;
 385
 386 #pragma pack()
 387
 388 //
 389 // UDF filesystem driver's private data
 390 //
 391 typedef struct {
 392   UDF_LOGICAL_VOLUME_DESCRIPTOR  **LogicalVolDescs;
 393   UINTN                          LogicalVolDescsNo;
 394   UDF_PARTITION_DESCRIPTOR       **PartitionDescs;
 395   UINTN                          PartitionDescsNo;
 396   UDF_FILE_SET_DESCRIPTOR        **FileSetDescs;
 397   UINTN                          FileSetDescsNo;
 398   UINTN                          FileEntrySize;
 399 } UDF_VOLUME_INFO;
 400
 401 typedef struct {
 402   VOID                            *FileEntry;
 403   UDF_FILE_IDENTIFIER_DESCRIPTOR  *FileIdentifierDesc;
 404 } UDF_FILE_INFO;
 405
 406 typedef struct {
 407   VOID                      *DirectoryData;
 408   UINT64                    DirectoryLength;
 409   UINT64                    FidOffset;
 410 } UDF_READ_DIRECTORY_INFO;
 411
 412 #define PRIVATE_UDF_FILE_DATA_SIGNATURE SIGNATURE_32 ('U', 'd', 'f', 'f')
 413
 414 #define PRIVATE_UDF_FILE_DATA_FROM_THIS(a) \
 415   CR ( \
 416       a, \
 417       PRIVATE_UDF_FILE_DATA, \
 418       FileIo, \
 419       PRIVATE_UDF_FILE_DATA_SIGNATURE \
 420       )
 421
 422 typedef struct {
 423   UINTN                            Signature;
 424   BOOLEAN                          IsRootDirectory;
 425   UDF_FILE_INFO                    *Root;
 426   UDF_FILE_INFO                    File;
 427   UDF_READ_DIRECTORY_INFO          ReadDirInfo;
 428   EFI_SIMPLE_FILE_SYSTEM_PROTOCOL  *SimpleFs;
 429   EFI_FILE_PROTOCOL                FileIo;
 430   CHAR16                           AbsoluteFileName[UDF_PATH_LENGTH];
 431   CHAR16                           FileName[UDF_FILENAME_LENGTH];
 432   UINT64                           FileSize;
 433   UINT64                           FilePosition;
 434 } PRIVATE_UDF_FILE_DATA;
 435
 436 #define PRIVATE_UDF_SIMPLE_FS_DATA_SIGNATURE SIGNATURE_32 ('U', 'd', 'f', 's')
 437
 438 #define PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS(a) \
 439   CR ( \
 440       a, \
 441       PRIVATE_UDF_SIMPLE_FS_DATA, \
 442       SimpleFs, \
 443       PRIVATE_UDF_SIMPLE_FS_DATA_SIGNATURE \
 444       )
 445
 446 typedef struct {
 447   UINTN                            Signature;
 448   EFI_BLOCK_IO_PROTOCOL            *BlockIo;
 449   EFI_DISK_IO_PROTOCOL             *DiskIo;
 450   EFI_SIMPLE_FILE_SYSTEM_PROTOCOL  SimpleFs;
 451   UDF_VOLUME_INFO                  Volume;
 452   UDF_FILE_INFO                    Root;
 453   UINTN                            OpenFiles;
 454   EFI_HANDLE                       Handle;
 455 } PRIVATE_UDF_SIMPLE_FS_DATA;
 456
 457 //
 458 // Global Variables
 459 //
 460 extern EFI_DRIVER_BINDING_PROTOCOL   gUdfDriverBinding;
 461 extern EFI_COMPONENT_NAME_PROTOCOL   gUdfComponentName;
 462 extern EFI_COMPONENT_NAME2_PROTOCOL  gUdfComponentName2;
 463
 464 //
 465 // Function Prototypes
 466 //
 467
 468 /**
 469   Open the root directory on a volume.
 470
 471   @param  This Protocol instance pointer.
 472   @param  Root Returns an Open file handle for the root directory
 473
 474   @retval EFI_SUCCESS          The device was opened.
 475   @retval EFI_UNSUPPORTED      This volume does not support the file system.
 476   @retval EFI_NO_MEDIA         The device has no media.
 477   @retval EFI_DEVICE_ERROR     The device reported an error.
 478   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 479   @retval EFI_ACCESS_DENIED    The service denied access to the file.
 480   @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of resources.
 481
 482 **/
 483 EFI_STATUS
 484 EFIAPI
 485 UdfOpenVolume (
 486   IN   EFI_SIMPLE_FILE_SYSTEM_PROTOCOL  *This,
 487   OUT  EFI_FILE_PROTOCOL                **Root
 488   );
 489
 490 /**
 491   Opens a new file relative to the source file's location.
 492
 493   @param  This       The protocol instance pointer.
 494   @param  NewHandle  Returns File Handle for FileName.
 495   @param  FileName   Null terminated string. "\", ".", and ".." are supported.
 496   @param  OpenMode   Open mode for file.
 497   @param  Attributes Only used for EFI_FILE_MODE_CREATE.
 498
 499   @retval EFI_SUCCESS          The device was opened.
 500   @retval EFI_NOT_FOUND        The specified file could not be found on the device.
 501   @retval EFI_NO_MEDIA         The device has no media.
 502   @retval EFI_MEDIA_CHANGED    The media has changed.
 503   @retval EFI_DEVICE_ERROR     The device reported an error.
 504   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 505   @retval EFI_ACCESS_DENIED    The service denied access to the file.
 506   @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of resources.
 507   @retval EFI_VOLUME_FULL      The volume is full.
 508
 509 **/
 510 EFI_STATUS
 511 EFIAPI
 512 UdfOpen (
 513   IN   EFI_FILE_PROTOCOL  *This,
 514   OUT  EFI_FILE_PROTOCOL  **NewHandle,
 515   IN   CHAR16             *FileName,
 516   IN   UINT64             OpenMode,
 517   IN   UINT64             Attributes
 518   );
 519
 520 /**
 521   Read data from the file.
 522
 523   @param  This       Protocol instance pointer.
 524   @param  BufferSize On input size of buffer, on output amount of data in buffer.
 525   @param  Buffer     The buffer in which data is read.
 526
 527   @retval EFI_SUCCESS          Data was read.
 528   @retval EFI_NO_MEDIA         The device has no media.
 529   @retval EFI_DEVICE_ERROR     The device reported an error.
 530   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 531   @retval EFI_BUFFER_TO_SMALL  BufferSize is too small. BufferSize contains required size.
 532
 533 **/
 534 EFI_STATUS
 535 EFIAPI
 536 UdfRead (
 537   IN      EFI_FILE_PROTOCOL  *This,
 538   IN OUT  UINTN              *BufferSize,
 539   OUT     VOID               *Buffer
 540   );
 541
 542 /**
 543   Close the file handle.
 544
 545   @param  This Protocol instance pointer.
 546
 547   @retval EFI_SUCCESS The file was closed.
 548
 549 **/
 550 EFI_STATUS
 551 EFIAPI
 552 UdfClose (
 553   IN EFI_FILE_PROTOCOL *This
 554   );
 555
 556 /**
 557   Close and delete the file handle.
 558
 559   @param  This Protocol instance pointer.
 560
 561   @retval EFI_SUCCESS              The file was closed and deleted.
 562   @retval EFI_WARN_DELETE_FAILURE  The handle was closed but the file was not
 563                                    deleted.
 564
 565 **/
 566 EFI_STATUS
 567 EFIAPI
 568 UdfDelete (
 569   IN EFI_FILE_PROTOCOL  *This
 570   );
 571
 572 /**
 573   Write data to a file.
 574
 575   @param  This       Protocol instance pointer.
 576   @param  BufferSize On input size of buffer, on output amount of data in buffer.
 577   @param  Buffer     The buffer in which data to write.
 578
 579   @retval EFI_SUCCESS          Data was written.
 580   @retval EFI_UNSUPPORTED      Writes to Open directory are not supported.
 581   @retval EFI_NO_MEDIA         The device has no media.
 582   @retval EFI_DEVICE_ERROR     The device reported an error.
 583   @retval EFI_DEVICE_ERROR     An attempt was made to write to a deleted file.
 584   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 585   @retval EFI_WRITE_PROTECTED  The device is write protected.
 586   @retval EFI_ACCESS_DENIED    The file was open for read only.
 587   @retval EFI_VOLUME_FULL      The volume is full.
 588
 589 **/
 590 EFI_STATUS
 591 EFIAPI
 592 UdfWrite (
 593   IN      EFI_FILE_PROTOCOL  *This,
 594   IN OUT  UINTN              *BufferSize,
 595   IN      VOID               *Buffer
 596   );
 597
 598 /**
 599   Get file's current position.
 600
 601   @param  This      Protocol instance pointer.
 602   @param  Position  Byte position from the start of the file.
 603
 604   @retval EFI_SUCCESS     Position was updated.
 605   @retval EFI_UNSUPPORTED Seek request for directories is not valid.
 606
 607 **/
 608 EFI_STATUS
 609 EFIAPI
 610 UdfGetPosition (
 611   IN   EFI_FILE_PROTOCOL  *This,
 612   OUT  UINT64             *Position
 613   );
 614
 615 /**
 616   Set file's current position.
 617
 618   @param  This      Protocol instance pointer.
 619   @param  Position  Byte position from the start of the file.
 620
 621   @retval EFI_SUCCESS      Position was updated.
 622   @retval EFI_UNSUPPORTED  Seek request for non-zero is not valid on open.
 623
 624 **/
 625 EFI_STATUS
 626 EFIAPI
 627 UdfSetPosition (
 628   IN EFI_FILE_PROTOCOL  *This,
 629   IN UINT64             Position
 630   );
 631
 632 /**
 633   Get information about a file.
 634
 635   @param  This            Protocol instance pointer.
 636   @param  InformationType Type of information to return in Buffer.
 637   @param  BufferSize      On input size of buffer, on output amount of data in buffer.
 638   @param  Buffer          The buffer to return data.
 639
 640   @retval EFI_SUCCESS          Data was returned.
 641   @retval EFI_UNSUPPORTED      InformationType is not supported.
 642   @retval EFI_NO_MEDIA         The device has no media.
 643   @retval EFI_DEVICE_ERROR     The device reported an error.
 644   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 645   @retval EFI_WRITE_PROTECTED  The device is write protected.
 646   @retval EFI_ACCESS_DENIED    The file was open for read only.
 647   @retval EFI_BUFFER_TOO_SMALL Buffer was too small; required size returned in BufferSize.
 648
 649 **/
 650 EFI_STATUS
 651 EFIAPI
 652 UdfGetInfo (
 653   IN      EFI_FILE_PROTOCOL  *This,
 654   IN      EFI_GUID           *InformationType,
 655   IN OUT  UINTN              *BufferSize,
 656   OUT     VOID               *Buffer
 657   );
 658
 659 /**
 660   Set information about a file.
 661
 662   @param  File            Protocol instance pointer.
 663   @param  InformationType Type of information in Buffer.
 664   @param  BufferSize      Size of buffer.
 665   @param  Buffer          The data to write.
 666
 667   @retval EFI_SUCCESS          Data was set.
 668   @retval EFI_UNSUPPORTED      InformationType is not supported.
 669   @retval EFI_NO_MEDIA         The device has no media.
 670   @retval EFI_DEVICE_ERROR     The device reported an error.
 671   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 672   @retval EFI_WRITE_PROTECTED  The device is write protected.
 673   @retval EFI_ACCESS_DENIED    The file was open for read only.
 674
 675 **/
 676 EFI_STATUS
 677 EFIAPI
 678 UdfSetInfo (
 679   IN EFI_FILE_PROTOCOL  *This,
 680   IN EFI_GUID           *InformationType,
 681   IN UINTN              BufferSize,
 682   IN VOID               *Buffer
 683   );
 684
 685 /**
 686   Flush data back for the file handle.
 687
 688   @param  This Protocol instance pointer.
 689
 690   @retval EFI_SUCCESS          Data was flushed.
 691   @retval EFI_UNSUPPORTED      Writes to Open directory are not supported.
 692   @retval EFI_NO_MEDIA         The device has no media.
 693   @retval EFI_DEVICE_ERROR     The device reported an error.
 694   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 695   @retval EFI_WRITE_PROTECTED  The device is write protected.
 696   @retval EFI_ACCESS_DENIED    The file was open for read only.
 697   @retval EFI_VOLUME_FULL      The volume is full.
 698
 699 **/
 700 EFI_STATUS
 701 EFIAPI
 702 UdfFlush (
 703   IN EFI_FILE_PROTOCOL *This
 704   );
 705
 706 /**
 707   Read volume information on a medium which contains a valid UDF file system.
 708
 709   @param[in]   BlockIo  BlockIo interface.
 710   @param[in]   DiskIo   DiskIo interface.
 711   @param[out]  Volume   UDF volume information structure.
 712
 713   @retval EFI_SUCCESS          Volume information read.
 714   @retval EFI_NO_MEDIA         The device has no media.
 715   @retval EFI_DEVICE_ERROR     The device reported an error.
 716   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 717   @retval EFI_OUT_OF_RESOURCES The volume was not read due to lack of resources.
 718
 719 **/
 720 EFI_STATUS
 721 ReadUdfVolumeInformation (
 722   IN   EFI_BLOCK_IO_PROTOCOL  *BlockIo,
 723   IN   EFI_DISK_IO_PROTOCOL   *DiskIo,
 724   OUT  UDF_VOLUME_INFO        *Volume
 725   );
 726
 727 /**
 728   Find the root directory on an UDF volume.
 729
 730   @param[in]   BlockIo  BlockIo interface.
 731   @param[in]   DiskIo   DiskIo interface.
 732   @param[in]   Volume   UDF volume information structure.
 733   @param[out]  File     Root directory file.
 734
 735   @retval EFI_SUCCESS          Root directory found.
 736   @retval EFI_NO_MEDIA         The device has no media.
 737   @retval EFI_DEVICE_ERROR     The device reported an error.
 738   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 739   @retval EFI_OUT_OF_RESOURCES The root directory was not found due to lack of
 740                                resources.
 741
 742 **/
 743 EFI_STATUS
 744 FindRootDirectory (
 745   IN   EFI_BLOCK_IO_PROTOCOL  *BlockIo,
 746   IN   EFI_DISK_IO_PROTOCOL   *DiskIo,
 747   IN   UDF_VOLUME_INFO        *Volume,
 748   OUT  UDF_FILE_INFO          *File
 749   );
 750
 751 /**
 752   Find either a File Entry or a Extended File Entry from a given ICB.
 753
 754   @param[in]   BlockIo    BlockIo interface.
 755   @param[in]   DiskIo     DiskIo interface.
 756   @param[in]   Volume     UDF volume information structure.
 757   @param[in]   Icb        ICB of the FID.
 758   @param[out]  FileEntry  File Entry or Extended File Entry.
 759
 760   @retval EFI_SUCCESS          File Entry or Extended File Entry found.
 761   @retval EFI_NO_MEDIA         The device has no media.
 762   @retval EFI_DEVICE_ERROR     The device reported an error.
 763   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 764   @retval EFI_OUT_OF_RESOURCES The FE/EFE entry was not found due to lack of
 765                                resources.
 766
 767 **/
 768 EFI_STATUS
 769 FindFileEntry (
 770   IN   EFI_BLOCK_IO_PROTOCOL           *BlockIo,
 771   IN   EFI_DISK_IO_PROTOCOL            *DiskIo,
 772   IN   UDF_VOLUME_INFO                 *Volume,
 773   IN   UDF_LONG_ALLOCATION_DESCRIPTOR  *Icb,
 774   OUT  VOID                            **FileEntry
 775   );
 776
 777 /**
 778   Find a file given its absolute path on an UDF volume.
 779
 780   @param[in]   BlockIo   BlockIo interface.
 781   @param[in]   DiskIo    DiskIo interface.
 782   @param[in]   Volume    UDF volume information structure.
 783   @param[in]   FilePath  File's absolute path.
 784   @param[in]   Root      Root directory file.
 785   @param[in]   Parent    Parent directory file.
 786   @param[out]  File      Found file.
 787
 788   @retval EFI_SUCCESS          @p FilePath was found.
 789   @retval EFI_NO_MEDIA         The device has no media.
 790   @retval EFI_DEVICE_ERROR     The device reported an error.
 791   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 792   @retval EFI_OUT_OF_RESOURCES The @p FilePath file was not found due to lack of
 793                                resources.
 794
 795 **/
 796 EFI_STATUS
 797 FindFile (
 798   IN   EFI_BLOCK_IO_PROTOCOL           *BlockIo,
 799   IN   EFI_DISK_IO_PROTOCOL            *DiskIo,
 800   IN   UDF_VOLUME_INFO                 *Volume,
 801   IN   CHAR16                          *FilePath,
 802   IN   UDF_FILE_INFO                   *Root,
 803   IN   UDF_FILE_INFO                   *Parent,
 804   IN   UDF_LONG_ALLOCATION_DESCRIPTOR  *Icb,
 805   OUT  UDF_FILE_INFO                   *File
 806   );
 807
 808 /**
 809   Read a directory entry at a time on an UDF volume.
 810
 811   @param[in]      BlockIo        BlockIo interface.
 812   @param[in]      DiskIo         DiskIo interface.
 813   @param[in]      Volume         UDF volume information structure.
 814   @param[in]      ParentIcb      ICB of the parent file.
 815   @param[in]      FileEntryData  FE/EFE of the parent file.
 816   @param[in out]  ReadDirInfo    Next read directory listing structure
 817                                  information.
 818   @param[out]     FoundFid       File Identifier Descriptor pointer.
 819
 820   @retval EFI_SUCCESS          Directory entry read.
 821   @retval EFI_UNSUPPORTED      Extended Allocation Descriptors not supported.
 822   @retval EFI_NO_MEDIA         The device has no media.
 823   @retval EFI_DEVICE_ERROR     The device reported an error.
 824   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 825   @retval EFI_OUT_OF_RESOURCES The directory entry was not read due to lack of
 826                                resources.
 827
 828 **/
 829 EFI_STATUS
 830 ReadDirectoryEntry (
 831   IN      EFI_BLOCK_IO_PROTOCOL           *BlockIo,
 832   IN      EFI_DISK_IO_PROTOCOL            *DiskIo,
 833   IN      UDF_VOLUME_INFO                 *Volume,
 834   IN      UDF_LONG_ALLOCATION_DESCRIPTOR  *ParentIcb,
 835   IN      VOID                            *FileEntryData,
 836   IN OUT  UDF_READ_DIRECTORY_INFO         *ReadDirInfo,
 837   OUT     UDF_FILE_IDENTIFIER_DESCRIPTOR  **FoundFid
 838   );
 839
 840 /**
 841   Get a filename (encoded in OSTA-compressed format) from a File Identifier
 842   Descriptor on an UDF volume.
 843
 844   @param[in]   FileIdentifierDesc  File Identifier Descriptor pointer.
 845   @param[out]  FileName            Decoded filename.
 846
 847   @retval EFI_SUCCESS           Filename decoded and read.
 848   @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted.
 849 **/
 850 EFI_STATUS
 851 GetFileNameFromFid (
 852   IN   UDF_FILE_IDENTIFIER_DESCRIPTOR  *FileIdentifierDesc,
 853   OUT  CHAR16                          *FileName
 854   );
 855
 856 /**
 857   Resolve a symlink file on an UDF volume.
 858
 859   @param[in]   BlockIo        BlockIo interface.
 860   @param[in]   DiskIo         DiskIo interface.
 861   @param[in]   Volume         UDF volume information structure.
 862   @param[in]   Parent         Parent file.
 863   @param[in]   FileEntryData  FE/EFE structure pointer.
 864   @param[out]  File           Resolved file.
 865
 866   @retval EFI_SUCCESS          Symlink file resolved.
 867   @retval EFI_UNSUPPORTED      Extended Allocation Descriptors not supported.
 868   @retval EFI_NO_MEDIA         The device has no media.
 869   @retval EFI_DEVICE_ERROR     The device reported an error.
 870   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 871   @retval EFI_OUT_OF_RESOURCES The symlink file was not resolved due to lack of
 872                                resources.
 873
 874 **/
 875 EFI_STATUS
 876 ResolveSymlink (
 877   IN   EFI_BLOCK_IO_PROTOCOL  *BlockIo,
 878   IN   EFI_DISK_IO_PROTOCOL   *DiskIo,
 879   IN   UDF_VOLUME_INFO        *Volume,
 880   IN   UDF_FILE_INFO          *Parent,
 881   IN   VOID                   *FileEntryData,
 882   OUT  UDF_FILE_INFO          *File
 883   );
 884
 885 /**
 886   Clean up in-memory UDF volume information.
 887
 888   @param[in] Volume Volume information pointer.
 889
 890 **/
 891 VOID
 892 CleanupVolumeInformation (
 893   IN UDF_VOLUME_INFO *Volume
 894   );
 895
 896 /**
 897   Clean up in-memory UDF file information.
 898
 899   @param[in] File File information pointer.
 900
 901 **/
 902 VOID
 903 CleanupFileInformation (
 904   IN UDF_FILE_INFO *File
 905   );
 906
 907 /**
 908   Find a file from its absolute path on an UDF volume.
 909
 910   @param[in]   BlockIo  BlockIo interface.
 911   @param[in]   DiskIo   DiskIo interface.
 912   @param[in]   Volume   UDF volume information structure.
 913   @param[in]   File     File information structure.
 914   @param[out]  Size     Size of the file.
 915
 916   @retval EFI_SUCCESS          File size calculated and set in @p Size.
 917   @retval EFI_UNSUPPORTED      Extended Allocation Descriptors not supported.
 918   @retval EFI_NO_MEDIA         The device has no media.
 919   @retval EFI_DEVICE_ERROR     The device reported an error.
 920   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 921   @retval EFI_OUT_OF_RESOURCES The file size was not calculated due to lack of
 922                                resources.
 923
 924 **/
 925 EFI_STATUS
 926 GetFileSize (
 927   IN   EFI_BLOCK_IO_PROTOCOL  *BlockIo,
 928   IN   EFI_DISK_IO_PROTOCOL   *DiskIo,
 929   IN   UDF_VOLUME_INFO        *Volume,
 930   IN   UDF_FILE_INFO          *File,
 931   OUT  UINT64                 *Size
 932   );
 933
 934 /**
 935   Set information about a file on an UDF volume.
 936
 937   @param[in]      File        File pointer.
 938   @param[in]      FileSize    Size of the file.
 939   @param[in]      FileName    Filename of the file.
 940   @param[in out]  BufferSize  Size of the returned file infomation.
 941   @param[out]     Buffer      Data of the returned file information.
 942
 943   @retval EFI_SUCCESS          File information set.
 944   @retval EFI_NO_MEDIA         The device has no media.
 945   @retval EFI_DEVICE_ERROR     The device reported an error.
 946   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 947   @retval EFI_OUT_OF_RESOURCES The file information was not set due to lack of
 948                                resources.
 949
 950 **/
 951 EFI_STATUS
 952 SetFileInfo (
 953   IN      UDF_FILE_INFO  *File,
 954   IN      UINT64         FileSize,
 955   IN      CHAR16         *FileName,
 956   IN OUT  UINTN          *BufferSize,
 957   OUT     VOID           *Buffer
 958   );
 959
 960 /**
 961   Get volume and free space size information of an UDF volume.
 962
 963   @param[in]   BlockIo        BlockIo interface.
 964   @param[in]   DiskIo         DiskIo interface.
 965   @param[in]   Volume         UDF volume information structure.
 966   @param[out]  VolumeSize     Volume size.
 967   @param[out]  FreeSpaceSize  Free space size.
 968
 969   @retval EFI_SUCCESS          Volume and free space size calculated.
 970   @retval EFI_NO_MEDIA         The device has no media.
 971   @retval EFI_DEVICE_ERROR     The device reported an error.
 972   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
 973   @retval EFI_OUT_OF_RESOURCES The volume and free space size were not
 974                                calculated due to lack of resources.
 975
 976 **/
 977 EFI_STATUS
 978 GetVolumeSize (
 979   IN   EFI_BLOCK_IO_PROTOCOL  *BlockIo,
 980   IN   EFI_DISK_IO_PROTOCOL   *DiskIo,
 981   IN   UDF_VOLUME_INFO        *Volume,
 982   OUT  UINT64                 *VolumeSize,
 983   OUT  UINT64                 *FreeSpaceSize
 984   );
 985
 986 /**
 987   Seek a file and read its data into memory on an UDF volume.
 988
 989   @param[in]      BlockIo       BlockIo interface.
 990   @param[in]      DiskIo        DiskIo interface.
 991   @param[in]      Volume        UDF volume information structure.
 992   @param[in]      File          File information structure.
 993   @param[in]      FileSize      Size of the file.
 994   @param[in out]  FilePosition  File position.
 995   @param[in out]  Buffer        File data.
 996   @param[in out]  BufferSize    Read size.
 997
 998   @retval EFI_SUCCESS          File seeked and read.
 999   @retval EFI_UNSUPPORTED      Extended Allocation Descriptors not supported.
1000   @retval EFI_NO_MEDIA         The device has no media.
1001   @retval EFI_DEVICE_ERROR     The device reported an error.
1002   @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
1003   @retval EFI_OUT_OF_RESOURCES The file's recorded data was not read due to lack
1004                                of resources.
1005
1006 **/
1007 EFI_STATUS
1008 ReadFileData (
1009   IN      EFI_BLOCK_IO_PROTOCOL  *BlockIo,
1010   IN      EFI_DISK_IO_PROTOCOL   *DiskIo,
1011   IN      UDF_VOLUME_INFO        *Volume,
1012   IN      UDF_FILE_INFO          *File,
1013   IN      UINT64                 FileSize,
1014   IN OUT  UINT64                 *FilePosition,
1015   IN OUT  VOID                   *Buffer,
1016   IN OUT  UINT64                 *BufferSize
1017   );
1018
1019 /**
1020   Check if ControllerHandle supports an UDF file system.
1021
1022   @param[in]  This                Protocol instance pointer.
1023   @param[in]  ControllerHandle    Handle of device to test.
1024
1025   @retval EFI_SUCCESS             UDF file system found.
1026   @retval EFI_UNSUPPORTED         UDF file system not found.
1027
1028 **/
1029 EFI_STATUS
1030 SupportUdfFileSystem (
1031   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
1032   IN EFI_HANDLE                   ControllerHandle
1033   );
1034
1035 /**
1036   Mangle a filename by cutting off trailing whitespaces, "\\", "." and "..".
1037
1038   @param[in] FileName Filename.
1039
1040   @retval @p FileName Filename mangled.
1041
1042 **/
1043 CHAR16 *
1044 MangleFileName (
1045   IN CHAR16        *FileName
1046   );
1047
1048 /**
1049   Test to see if this driver supports ControllerHandle. Any ControllerHandle
1050   than contains a BlockIo and DiskIo protocol can be supported.
1051
1052   @param  This                Protocol instance pointer.
1053   @param  ControllerHandle    Handle of device to test
1054   @param  RemainingDevicePath Optional parameter use to pick a specific child
1055                               device to start.
1056
1057   @retval EFI_SUCCESS         This driver supports this device
1058   @retval EFI_ALREADY_STARTED This driver is already running on this device
1059   @retval other               This driver does not support this device
1060
1061 **/
1062 EFI_STATUS
1063 EFIAPI
1064 UdfDriverBindingSupported (
1065   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
1066   IN EFI_HANDLE                   ControllerHandle,
1067   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
1068   );
1069
1070 /**
1071   Start this driver on ControllerHandle by opening a Block IO and Disk IO
1072   protocol, reading Device Path, and creating a child handle with a
1073   Disk IO and device path protocol.
1074
1075   @param  This                 Protocol instance pointer.
1076   @param  ControllerHandle     Handle of device to bind driver to
1077   @param  RemainingDevicePath  Optional parameter use to pick a specific child
1078                                device to start.
1079
1080   @retval EFI_SUCCESS          This driver is added to ControllerHandle
1081   @retval EFI_ALREADY_STARTED  This driver is already running on ControllerHandle
1082   @retval other                This driver does not support this device
1083
1084 **/
1085 EFI_STATUS
1086 EFIAPI
1087 UdfDriverBindingStart (
1088   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
1089   IN EFI_HANDLE                   ControllerHandle,
1090   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath
1091   );
1092
1093 /**
1094   Stop this driver on ControllerHandle. Support stopping any child handles
1095   created by this driver.
1096
1097   @param  This              Protocol instance pointer.
1098   @param  ControllerHandle  Handle of device to stop driver on
1099   @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
1100                             children is zero stop the entire bus driver.
1101   @param  ChildHandleBuffer List of Child Handles to Stop.
1102
1103   @retval EFI_SUCCESS       This driver is removed ControllerHandle
1104   @retval other             This driver was not removed from this device
1105
1106 **/
1107 EFI_STATUS
1108 EFIAPI
1109 UdfDriverBindingStop (
1110   IN  EFI_DRIVER_BINDING_PROTOCOL   *This,
1111   IN  EFI_HANDLE                    ControllerHandle,
1112   IN  UINTN                         NumberOfChildren,
1113   IN  EFI_HANDLE                    *ChildHandleBuffer
1114   );
1115
1116 //
1117 // EFI Component Name Functions
1118 //
1119 /**
1120   Retrieves a Unicode string that is the user readable name of the driver.
1121
1122   This function retrieves the user readable name of a driver in the form of a
1123   Unicode string. If the driver specified by This has a user readable name in
1124   the language specified by Language, then a pointer to the driver name is
1125   returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
1126   by This does not support the language specified by Language,
1127   then EFI_UNSUPPORTED is returned.
1128
1129   @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
1130                                 EFI_COMPONENT_NAME_PROTOCOL instance.
1131
1132   @param  Language[in]          A pointer to a Null-terminated ASCII string
1133                                 array indicating the language. This is the
1134                                 language of the driver name that the caller is
1135                                 requesting, and it must match one of the
1136                                 languages specified in SupportedLanguages. The
1137                                 number of languages supported by a driver is up
1138                                 to the driver writer. Language is specified
1139                                 in RFC 4646 or ISO 639-2 language code format.
1140
1141   @param  DriverName[out]       A pointer to the Unicode string to return.
1142                                 This Unicode string is the name of the
1143                                 driver specified by This in the language
1144                                 specified by Language.
1145
1146   @retval EFI_SUCCESS           The Unicode string for the Driver specified by
1147                                 This and the language specified by Language was
1148                                 returned in DriverName.
1149
1150   @retval EFI_INVALID_PARAMETER Language is NULL.
1151
1152   @retval EFI_INVALID_PARAMETER DriverName is NULL.
1153
1154   @retval EFI_UNSUPPORTED       The driver specified by This does not support
1155                                 the language specified by Language.
1156
1157 **/
1158 EFI_STATUS
1159 EFIAPI
1160 UdfComponentNameGetDriverName (
1161   IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
1162   IN  CHAR8                        *Language,
1163   OUT CHAR16                       **DriverName
1164   );
1165
1166 /**
1167   Retrieves a Unicode string that is the user readable name of the controller
1168   that is being managed by a driver.
1169
1170   This function retrieves the user readable name of the controller specified by
1171   ControllerHandle and ChildHandle in the form of a Unicode string. If the
1172   driver specified by This has a user readable name in the language specified by
1173   Language, then a pointer to the controller name is returned in ControllerName,
1174   and EFI_SUCCESS is returned.  If the driver specified by This is not currently
1175   managing the controller specified by ControllerHandle and ChildHandle,
1176   then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
1177   support the language specified by Language, then EFI_UNSUPPORTED is returned.
1178
1179   @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
1180                                 EFI_COMPONENT_NAME_PROTOCOL instance.
1181
1182   @param  ControllerHandle[in]  The handle of a controller that the driver
1183                                 specified by This is managing.  This handle
1184                                 specifies the controller whose name is to be
1185                                 returned.
1186
1187   @param  ChildHandle[in]       The handle of the child controller to retrieve
1188                                 the name of.  This is an optional parameter that
1189                                 may be NULL.  It will be NULL for device
1190                                 drivers.  It will also be NULL for a bus drivers
1191                                 that wish to retrieve the name of the bus
1192                                 controller.  It will not be NULL for a bus
1193                                 driver that wishes to retrieve the name of a
1194                                 child controller.
1195
1196   @param  Language[in]          A pointer to a Null-terminated ASCII string
1197                                 array indicating the language.  This is the
1198                                 language of the driver name that the caller is
1199                                 requesting, and it must match one of the
1200                                 languages specified in SupportedLanguages. The
1201                                 number of languages supported by a driver is up
1202                                 to the driver writer. Language is specified in
1203                                 RFC 4646 or ISO 639-2 language code format.
1204
1205   @param  ControllerName[out]   A pointer to the Unicode string to return.
1206                                 This Unicode string is the name of the
1207                                 controller specified by ControllerHandle and
1208                                 ChildHandle in the language specified by
1209                                 Language from the point of view of the driver
1210                                 specified by This.
1211
1212   @retval EFI_SUCCESS           The Unicode string for the user readable name in
1213                                 the language specified by Language for the
1214                                 driver specified by This was returned in
1215                                 DriverName.
1216
1217   @retval EFI_INVALID_PARAMETER ControllerHandle is not a valid EFI_HANDLE.
1218
1219   @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
1220                                 EFI_HANDLE.
1221
1222   @retval EFI_INVALID_PARAMETER Language is NULL.
1223
1224   @retval EFI_INVALID_PARAMETER ControllerName is NULL.
1225
1226   @retval EFI_UNSUPPORTED       The driver specified by This is not currently
1227                                 managing the controller specified by
1228                                 ControllerHandle and ChildHandle.
1229
1230   @retval EFI_UNSUPPORTED       The driver specified by This does not support
1231                                 the language specified by Language.
1232
1233 **/
1234 EFI_STATUS
1235 EFIAPI
1236 UdfComponentNameGetControllerName (
1237   IN   EFI_COMPONENT_NAME_PROTOCOL  *This,
1238   IN   EFI_HANDLE                   ControllerHandle,
1239   IN   EFI_HANDLE                   ChildHandle OPTIONAL,
1240   IN   CHAR8                        *Language,
1241   OUT  CHAR16                       **ControllerName
1242   );
1243
1244 #endif // _UDF_H_