1 /** @file 2 The internal header file of FvSimpleFileSystem driver. 3 4 Copyright (c) 2014, ARM Limited. All rights reserved. 5 Copyright (c) 2014, Intel Corporation. All rights reserved.<BR> 6 7 This program and the accompanying materials 8 are licensed and made available under the terms and conditions of the BSD License 9 which accompanies this distribution. The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #ifndef __FVFS_INTERNAL_H__ 18 #define __FVFS_INTERNAL_H__ 19 20 #include <Uefi.h> 21 #include <PiDxe.h> 22 23 #include <Library/BaseLib.h> 24 #include <Library/BaseMemoryLib.h> 25 #include <Library/DebugLib.h> 26 #include <Library/DevicePathLib.h> 27 #include <Library/MemoryAllocationLib.h> 28 #include <Library/PrintLib.h> 29 #include <Library/UefiBootServicesTableLib.h> 30 #include <Library/UefiLib.h> 31 32 #include <Protocol/DriverBinding.h> 33 #include <Protocol/FirmwareVolume2.h> 34 #include <Protocol/SimpleFileSystem.h> 35 #include <Protocol/UnicodeCollation.h> 36 37 #include <Guid/FileSystemInfo.h> 38 #include <Guid/FileInfo.h> 39 #include <Guid/FileSystemVolumeLabelInfo.h> 40 41 typedef struct _FV_FILESYSTEM_FILE FV_FILESYSTEM_FILE; 42 typedef struct _FV_FILESYSTEM_FILE_INFO FV_FILESYSTEM_FILE_INFO; 43 typedef struct _FV_FILESYSTEM_INSTANCE FV_FILESYSTEM_INSTANCE; 44 45 // 46 // Struct representing an instance of the "filesystem". There will be one of 47 // these structs per FV. 48 // 49 struct _FV_FILESYSTEM_INSTANCE { 50 UINT32 Signature; 51 LIST_ENTRY FileInfoHead; 52 LIST_ENTRY FileHead; 53 EFI_DRIVER_BINDING_PROTOCOL *DriverBinding; 54 EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol; 55 EFI_SIMPLE_FILE_SYSTEM_PROTOCOL SimpleFs; 56 FV_FILESYSTEM_FILE *Root; 57 CHAR16 *VolumeLabel; 58 }; 59 60 // 61 // Struct representing a opening file. Each opening operation on file will 62 // create such an instance except for the "root directory", which will only 63 // be created once for each FV. 64 // 65 struct _FV_FILESYSTEM_FILE { 66 UINT32 Signature; 67 LIST_ENTRY Link; 68 FV_FILESYSTEM_FILE_INFO *DirReadNext; 69 FV_FILESYSTEM_INSTANCE *Instance; 70 EFI_FILE_PROTOCOL FileProtocol; 71 FV_FILESYSTEM_FILE_INFO *FvFileInfo; 72 UINT64 Position; 73 }; 74 75 // 76 // Struct representing the info of a file. 77 // 78 struct _FV_FILESYSTEM_FILE_INFO { 79 UINT32 Signature; 80 LIST_ENTRY Link; 81 EFI_GUID NameGuid; 82 EFI_FV_FILETYPE Type; 83 EFI_FILE_INFO FileInfo; 84 }; 85 86 #define FVFS_FILE_SIGNATURE SIGNATURE_32 ('f', 'v', 'f', 'i') 87 #define FVFS_FILE_INFO_SIGNATURE SIGNATURE_32 ('f', 'v', 'i', 'n') 88 #define FVFS_INSTANCE_SIGNATURE SIGNATURE_32 ('f', 'v', 'f', 's') 89 90 #define FVFS_INSTANCE_FROM_SIMPLE_FS_THIS(This) CR ( \ 91 This, \ 92 FV_FILESYSTEM_INSTANCE, \ 93 SimpleFs, \ 94 FVFS_INSTANCE_SIGNATURE \ 95 ) 96 97 #define FVFS_FILE_FROM_FILE_THIS(This) CR ( \ 98 This, \ 99 FV_FILESYSTEM_FILE, \ 100 FileProtocol, \ 101 FVFS_FILE_SIGNATURE \ 102 ) 103 104 #define FVFS_FILE_INFO_FROM_LINK(This) CR ( \ 105 This, \ 106 FV_FILESYSTEM_FILE_INFO, \ 107 Link, \ 108 FVFS_FILE_INFO_SIGNATURE \ 109 ) 110 111 #define FVFS_FILE_FROM_LINK(FileLink) CR (FileLink, FV_FILESYSTEM_FILE, Link, FVFS_FILE_SIGNATURE) 112 113 #define FVFS_GET_FIRST_FILE(Instance) FVFS_FILE_FROM_LINK (GetFirstNode (&Instance->FileHead)) 114 115 #define FVFS_GET_FIRST_FILE_INFO(Instance) FVFS_FILE_INFO_FROM_LINK (GetFirstNode (&Instance->FileInfoHead)) 116 117 118 #define FV_FILETYPE_IS_EXECUTABLE(Type) ((Type) == EFI_FV_FILETYPE_PEIM || \ 119 (Type) == EFI_FV_FILETYPE_DRIVER || \ 120 (Type) == EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER || \ 121 (Type) == EFI_FV_FILETYPE_APPLICATION) 122 123 /** 124 Open the root directory on a volume. 125 126 @param This A pointer to the volume to open the root directory. 127 @param RootFile A pointer to the location to return the opened file handle for the 128 root directory. 129 130 @retval EFI_SUCCESS The device was opened. 131 @retval EFI_UNSUPPORTED This volume does not support the requested file system type. 132 @retval EFI_NO_MEDIA The device has no medium. 133 @retval EFI_DEVICE_ERROR The device reported an error. 134 @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. 135 @retval EFI_ACCESS_DENIED The service denied access to the file. 136 @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of resources. 137 @retval EFI_MEDIA_CHANGED The device has a different medium in it or the medium is no 138 longer supported. Any existing file handles for this volume are 139 no longer valid. To access the files on the new medium, the 140 volume must be reopened with OpenVolume(). 141 142 **/ 143 EFI_STATUS 144 EFIAPI 145 FvSimpleFileSystemOpenVolume ( 146 IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This, 147 OUT EFI_FILE_PROTOCOL **RootFile 148 ); 149 150 /** 151 Test to see if this driver supports ControllerHandle. 152 153 @param DriverBinding Protocol instance pointer. 154 @param ControllerHandle Handle of device to test 155 @param RemainingDevicePath Optional parameter use to pick a specific child 156 device to start. 157 158 @retval EFI_SUCCESS This driver supports this device 159 @retval EFI_ALREADY_STARTED This driver is already running on this device 160 @retval other This driver does not support this device 161 162 **/ 163 EFI_STATUS 164 EFIAPI 165 FvSimpleFileSystemDriverSupported ( 166 IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding, 167 IN EFI_HANDLE ControllerHandle, 168 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL 169 ); 170 171 /** 172 Start this driver on ControllerHandle by opening a FV protocol and 173 installing a SimpleFileSystem protocol on ControllerHandle. 174 175 @param DriverBinding Protocol instance pointer. 176 @param ControllerHandle Handle of device to bind driver to 177 @param RemainingDevicePath Optional parameter use to pick a specific child 178 device to start. 179 180 @retval EFI_SUCCESS This driver is added to ControllerHandle 181 @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle 182 @retval other This driver does not support this device 183 184 **/ 185 EFI_STATUS 186 EFIAPI 187 FvSimpleFileSystemDriverStart ( 188 IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding, 189 IN EFI_HANDLE ControllerHandle, 190 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL 191 ); 192 193 /** 194 Stop this driver on ControllerHandle by removing SimpleFileSystem protocol and closing 195 the FV protocol on ControllerHandle. 196 197 @param DriverBinding Protocol instance pointer. 198 @param ControllerHandle Handle of device to stop driver on 199 @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of 200 children is zero stop the entire bus driver. 201 @param ChildHandleBuffer List of Child Handles to Stop. 202 203 @retval EFI_SUCCESS This driver is removed ControllerHandle 204 @retval other This driver was not removed from this device 205 206 **/ 207 EFI_STATUS 208 EFIAPI 209 FvSimpleFileSystemDriverStop ( 210 IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding, 211 IN EFI_HANDLE ControllerHandle, 212 IN UINTN NumberOfChildren, 213 IN EFI_HANDLE *ChildHandleBuffer OPTIONAL 214 ); 215 216 /** 217 Opens a new file relative to the source file's location. 218 219 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 220 handle to the source location. This would typically be an open 221 handle to a directory. 222 @param NewHandle A pointer to the location to return the opened handle for the new 223 file. 224 @param FileName The Null-terminated string of the name of the file to be opened. 225 The file name may contain the following path modifiers: "\", ".", 226 and "..". 227 @param OpenMode The mode to open the file. The only valid combinations that the 228 file may be opened with are: Read, Read/Write, or Create/Read/Write. 229 @param Attributes Only valid for EFI_FILE_MODE_CREATE, in which case these are the 230 attribute bits for the newly created file. 231 232 @retval EFI_SUCCESS The file was opened. 233 @retval EFI_NOT_FOUND The specified file could not be found on the device. 234 @retval EFI_NO_MEDIA The device has no medium. 235 @retval EFI_MEDIA_CHANGED The device has a different medium in it or the medium is no 236 longer supported. 237 @retval EFI_DEVICE_ERROR The device reported an error. 238 @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. 239 @retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a file for write 240 when the media is write-protected. 241 @retval EFI_ACCESS_DENIED The service denied access to the file. 242 @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the file. 243 @retval EFI_VOLUME_FULL The volume is full. 244 245 **/ 246 EFI_STATUS 247 EFIAPI 248 FvSimpleFileSystemOpen ( 249 IN EFI_FILE_PROTOCOL *This, 250 OUT EFI_FILE_PROTOCOL **NewHandle, 251 IN CHAR16 *FileName, 252 IN UINT64 OpenMode, 253 IN UINT64 Attributes 254 ); 255 256 /** 257 Closes a specified file handle. 258 259 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 260 handle to close. 261 262 @retval EFI_SUCCESS The file was closed. 263 264 **/ 265 EFI_STATUS 266 EFIAPI 267 FvSimpleFileSystemClose ( 268 IN EFI_FILE_PROTOCOL *This 269 ); 270 271 /** 272 Reads data from a file. 273 274 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 275 handle to read data from. 276 @param BufferSize On input, the size of the Buffer. On output, the amount of data 277 returned in Buffer. In both cases, the size is measured in bytes. 278 @param Buffer The buffer into which the data is read. 279 280 @retval EFI_SUCCESS Data was read. 281 @retval EFI_NO_MEDIA The device has no medium. 282 @retval EFI_DEVICE_ERROR The device reported an error. 283 @retval EFI_DEVICE_ERROR An attempt was made to read from a deleted file. 284 @retval EFI_DEVICE_ERROR On entry, the current file position is beyond the end of the file. 285 @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. 286 @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory 287 entry. BufferSize has been updated with the size 288 needed to complete the request. 289 290 **/ 291 EFI_STATUS 292 EFIAPI 293 FvSimpleFileSystemRead ( 294 IN EFI_FILE_PROTOCOL *This, 295 IN OUT UINTN *BufferSize, 296 OUT VOID *Buffer 297 ); 298 299 /** 300 Writes data to a file. 301 302 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 303 handle to write data to. 304 @param BufferSize On input, the size of the Buffer. On output, the amount of data 305 actually written. In both cases, the size is measured in bytes. 306 @param Buffer The buffer of data to write. 307 308 @retval EFI_SUCCESS Data was written. 309 @retval EFI_UNSUPPORTED Writes to open directory files are not supported. 310 @retval EFI_NO_MEDIA The device has no medium. 311 @retval EFI_DEVICE_ERROR The device reported an error. 312 @retval EFI_DEVICE_ERROR An attempt was made to write to a deleted file. 313 @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. 314 @retval EFI_WRITE_PROTECTED The file or medium is write-protected. 315 @retval EFI_ACCESS_DENIED The file was opened read only. 316 @retval EFI_VOLUME_FULL The volume is full. 317 318 **/ 319 EFI_STATUS 320 EFIAPI 321 FvSimpleFileSystemWrite ( 322 IN EFI_FILE_PROTOCOL *This, 323 IN OUT UINTN *BufferSize, 324 IN VOID *Buffer 325 ); 326 327 /** 328 Returns a file's current position. 329 330 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 331 handle to get the current position on. 332 @param Position The address to return the file's current position value. 333 334 @retval EFI_SUCCESS The position was returned. 335 @retval EFI_UNSUPPORTED The request is not valid on open directories. 336 @retval EFI_DEVICE_ERROR An attempt was made to get the position from a deleted file. 337 338 **/ 339 EFI_STATUS 340 EFIAPI 341 FvSimpleFileSystemGetPosition ( 342 IN EFI_FILE_PROTOCOL *This, 343 OUT UINT64 *Position 344 ); 345 346 /** 347 Sets a file's current position. 348 349 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the 350 file handle to set the requested position on. 351 @param Position The byte position from the start of the file to set. 352 353 @retval EFI_SUCCESS The position was set. 354 @retval EFI_UNSUPPORTED The seek request for nonzero is not valid on open 355 directories. 356 @retval EFI_DEVICE_ERROR An attempt was made to set the position of a deleted file. 357 358 **/ 359 EFI_STATUS 360 EFIAPI 361 FvSimpleFileSystemSetPosition ( 362 IN EFI_FILE_PROTOCOL *This, 363 IN UINT64 Position 364 ); 365 366 /** 367 Flushes all modified data associated with a file to a device. 368 369 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 370 handle to flush. 371 372 @retval EFI_SUCCESS The data was flushed. 373 @retval EFI_NO_MEDIA The device has no medium. 374 @retval EFI_DEVICE_ERROR The device reported an error. 375 @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. 376 @retval EFI_WRITE_PROTECTED The file or medium is write-protected. 377 @retval EFI_ACCESS_DENIED The file was opened read-only. 378 @retval EFI_VOLUME_FULL The volume is full. 379 380 **/ 381 EFI_STATUS 382 EFIAPI 383 FvSimpleFileSystemFlush ( 384 IN EFI_FILE_PROTOCOL *This 385 ); 386 387 /** 388 Close and delete the file handle. 389 390 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the 391 handle to the file to delete. 392 393 @retval EFI_SUCCESS The file was closed and deleted, and the handle was closed. 394 @retval EFI_WARN_DELETE_FAILURE The handle was closed, but the file was not deleted. 395 396 **/ 397 EFI_STATUS 398 EFIAPI 399 FvSimpleFileSystemDelete ( 400 IN EFI_FILE_PROTOCOL *This 401 ); 402 403 /** 404 Returns information about a file. 405 406 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 407 handle the requested information is for. 408 @param InformationType The type identifier for the information being requested. 409 @param BufferSize On input, the size of Buffer. On output, the amount of data 410 returned in Buffer. In both cases, the size is measured in bytes. 411 @param Buffer A pointer to the data buffer to return. The buffer's type is 412 indicated by InformationType. 413 414 @retval EFI_SUCCESS The information was returned. 415 @retval EFI_UNSUPPORTED The InformationType is not known. 416 @retval EFI_NO_MEDIA The device has no medium. 417 @retval EFI_DEVICE_ERROR The device reported an error. 418 @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. 419 @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory entry. 420 BufferSize has been updated with the size needed to complete 421 the request. 422 **/ 423 EFI_STATUS 424 EFIAPI 425 FvSimpleFileSystemGetInfo ( 426 IN EFI_FILE_PROTOCOL *This, 427 IN EFI_GUID *InformationType, 428 IN OUT UINTN *BufferSize, 429 OUT VOID *Buffer 430 ); 431 432 /** 433 Sets information about a file. 434 435 @param This A pointer to the EFI_FILE_PROTOCOL instance that is the file 436 handle the information is for. 437 @param InformationType The type identifier for the information being set. 438 @param BufferSize The size, in bytes, of Buffer. 439 @param Buffer A pointer to the data buffer to write. The buffer's type is 440 indicated by InformationType. 441 442 @retval EFI_SUCCESS The information was set. 443 @retval EFI_UNSUPPORTED The InformationType is not known. 444 @retval EFI_NO_MEDIA The device has no medium. 445 @retval EFI_DEVICE_ERROR The device reported an error. 446 @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted. 447 @retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_INFO_ID and the media is 448 read-only. 449 @retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_PROTOCOL_SYSTEM_INFO_ID 450 and the media is read only. 451 @retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_SYSTEM_VOLUME_LABEL_ID 452 and the media is read-only. 453 @retval EFI_ACCESS_DENIED An attempt is made to change the name of a file to a 454 file that is already present. 455 @retval EFI_ACCESS_DENIED An attempt is being made to change the EFI_FILE_DIRECTORY 456 Attribute. 457 @retval EFI_ACCESS_DENIED An attempt is being made to change the size of a directory. 458 @retval EFI_ACCESS_DENIED InformationType is EFI_FILE_INFO_ID and the file was opened 459 read-only and an attempt is being made to modify a field 460 other than Attribute. 461 @retval EFI_VOLUME_FULL The volume is full. 462 @retval EFI_BAD_BUFFER_SIZE BufferSize is smaller than the size of the type indicated 463 by InformationType. 464 465 **/ 466 EFI_STATUS 467 EFIAPI 468 FvSimpleFileSystemSetInfo ( 469 IN EFI_FILE_PROTOCOL *This, 470 IN EFI_GUID *InformationType, 471 IN UINTN BufferSize, 472 IN VOID *Buffer 473 ); 474 475 /** 476 Get the size of the buffer that will be returned by FvFsReadFile. 477 478 @param FvProtocol A pointer to the EFI_FIRMWARE_VOLUME2_PROTOCOL instance. 479 @param FvFileInfo A pointer to the FV_FILESYSTEM_FILE_INFO instance that is a struct 480 representing a file's info. 481 482 @retval EFI_SUCCESS The file size was gotten correctly. 483 @retval Others The file size wasn't gotten correctly. 484 485 **/ 486 EFI_STATUS 487 FvFsGetFileSize ( 488 IN EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol, 489 IN OUT FV_FILESYSTEM_FILE_INFO *FvFileInfo 490 ); 491 492 /** 493 Retrieves a Unicode string that is the user readable name of the driver. 494 495 This function retrieves the user readable name of a driver in the form of a 496 Unicode string. If the driver specified by This has a user readable name in 497 the language specified by Language, then a pointer to the driver name is 498 returned in DriverName, and EFI_SUCCESS is returned. If the driver specified 499 by This does not support the language specified by Language, 500 then EFI_UNSUPPORTED is returned. 501 502 @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or 503 EFI_COMPONENT_NAME_PROTOCOL instance. 504 505 @param Language[in] A pointer to a Null-terminated ASCII string 506 array indicating the language. This is the 507 language of the driver name that the caller is 508 requesting, and it must match one of the 509 languages specified in SupportedLanguages. The 510 number of languages supported by a driver is up 511 to the driver writer. Language is specified 512 in RFC 4646 or ISO 639-2 language code format. 513 514 @param DriverName[out] A pointer to the Unicode string to return. 515 This Unicode string is the name of the 516 driver specified by This in the language 517 specified by Language. 518 519 @retval EFI_SUCCESS The Unicode string for the Driver specified by 520 This and the language specified by Language was 521 returned in DriverName. 522 523 @retval EFI_INVALID_PARAMETER Language is NULL. 524 525 @retval EFI_INVALID_PARAMETER DriverName is NULL. 526 527 @retval EFI_UNSUPPORTED The driver specified by This does not support 528 the language specified by Language. 529 530 **/ 531 EFI_STATUS 532 EFIAPI 533 FvSimpleFileSystemComponentNameGetDriverName ( 534 IN EFI_COMPONENT_NAME_PROTOCOL *This, 535 IN CHAR8 *Language, 536 OUT CHAR16 **DriverName 537 ); 538 539 /** 540 Retrieves a Unicode string that is the user readable name of the controller 541 that is being managed by a driver. 542 543 This function retrieves the user readable name of the controller specified by 544 ControllerHandle and ChildHandle in the form of a Unicode string. If the 545 driver specified by This has a user readable name in the language specified by 546 Language, then a pointer to the controller name is returned in ControllerName, 547 and EFI_SUCCESS is returned. If the driver specified by This is not currently 548 managing the controller specified by ControllerHandle and ChildHandle, 549 then EFI_UNSUPPORTED is returned. If the driver specified by This does not 550 support the language specified by Language, then EFI_UNSUPPORTED is returned. 551 552 @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or 553 EFI_COMPONENT_NAME_PROTOCOL instance. 554 555 @param ControllerHandle[in] The handle of a controller that the driver 556 specified by This is managing. This handle 557 specifies the controller whose name is to be 558 returned. 559 560 @param ChildHandle[in] The handle of the child controller to retrieve 561 the name of. This is an optional parameter that 562 may be NULL. It will be NULL for device 563 drivers. It will also be NULL for a bus drivers 564 that wish to retrieve the name of the bus 565 controller. It will not be NULL for a bus 566 driver that wishes to retrieve the name of a 567 child controller. 568 569 @param Language[in] A pointer to a Null-terminated ASCII string 570 array indicating the language. This is the 571 language of the driver name that the caller is 572 requesting, and it must match one of the 573 languages specified in SupportedLanguages. The 574 number of languages supported by a driver is up 575 to the driver writer. Language is specified in 576 RFC 4646 or ISO 639-2 language code format. 577 578 @param ControllerName[out] A pointer to the Unicode string to return. 579 This Unicode string is the name of the 580 controller specified by ControllerHandle and 581 ChildHandle in the language specified by 582 Language from the point of view of the driver 583 specified by This. 584 585 @retval EFI_SUCCESS The Unicode string for the user readable name in 586 the language specified by Language for the 587 driver specified by This was returned in 588 DriverName. 589 590 @retval EFI_INVALID_PARAMETER ControllerHandle is NULL. 591 592 @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid 593 EFI_HANDLE. 594 595 @retval EFI_INVALID_PARAMETER Language is NULL. 596 597 @retval EFI_INVALID_PARAMETER ControllerName is NULL. 598 599 @retval EFI_UNSUPPORTED The driver specified by This is not currently 600 managing the controller specified by 601 ControllerHandle and ChildHandle. 602 603 @retval EFI_UNSUPPORTED The driver specified by This does not support 604 the language specified by Language. 605 606 **/ 607 EFI_STATUS 608 EFIAPI 609 FvSimpleFileSystemComponentNameGetControllerName ( 610 IN EFI_COMPONENT_NAME_PROTOCOL *This, 611 IN EFI_HANDLE ControllerHandle, 612 IN EFI_HANDLE ChildHandle OPTIONAL, 613 IN CHAR8 *Language, 614 OUT CHAR16 **ControllerName 615 ); 616 617 extern EFI_UNICODE_COLLATION_PROTOCOL *mUnicodeCollation; 618 extern EFI_FILE_PROTOCOL mFileSystemTemplate; 619 extern EFI_COMPONENT_NAME_PROTOCOL gFvSimpleFileSystemComponentName; 620 extern EFI_COMPONENT_NAME2_PROTOCOL gFvSimpleFileSystemComponentName2; 621 622 #endif 623