test: volinfo.c File Reference

00089 : 00090 00091 This is the common routine for querying volume information called by both 00092 the fsd and fsp threads. 00093 00094 Arguments: 00095 00096 Irp - Supplies the Irp being processed 00097 00098 Return Value: 00099 00100 NTSTATUS - The return status for the operation 00101 00102 --*/ 00103 00104 { 00105 NTSTATUS Status = STATUS_INVALID_PARAMETER; 00106 PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp ); 00107 00108 ULONG Length; 00109 00110 TYPE_OF_OPEN TypeOfOpen; 00111 PFCB Fcb; 00112 PCCB Ccb; 00113 00114 PAGED_CODE(); 00115 00116 // 00117 // Reference our input parameters to make things easier 00118 // 00119 00120 Length = IrpSp->Parameters.QueryVolume.Length; 00121 00122 // 00123 // Decode the file object and fail if this an unopened file object. 00124 // 00125 00126 TypeOfOpen = UdfDecodeFileObject( IrpSp->FileObject, &Fcb, &Ccb ); 00127 00128 if (TypeOfOpen == UnopenedFileObject) { 00129 00130 UdfCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER ); 00131 return STATUS_INVALID_PARAMETER; 00132 } 00133 00134 // 00135 // Acquire the Vcb for this volume. 00136 // 00137 00138 UdfAcquireVcbShared( IrpContext, Fcb->Vcb, FALSE ); 00139 00140 // 00141 // Use a try-finally to facilitate cleanup. 00142 // 00143 00144 try { 00145 00146 // 00147 // Verify the Vcb. 00148 // 00149 00150 UdfVerifyVcb( IrpContext, Fcb->Vcb ); 00151 00152 // 00153 // Based on the information class we'll do different actions. Each 00154 // of the procedures that we're calling fills up the output buffer 00155 // if possible and returns true if it successfully filled the buffer 00156 // and false if it couldn't wait for any I/O to complete. 00157 // 00158 00159 switch (IrpSp->Parameters.QueryVolume.FsInformationClass) { 00160 00161 case FileFsSizeInformation: 00162 00163 Status = UdfQueryFsSizeInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length ); 00164 break; 00165 00166 case FileFsVolumeInformation: 00167 00168 Status = UdfQueryFsVolumeInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length ); 00169 break; 00170 00171 case FileFsDeviceInformation: 00172 00173 Status = UdfQueryFsDeviceInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length ); 00174 break; 00175 00176 case FileFsAttributeInformation: 00177 00178 Status = UdfQueryFsAttributeInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length ); 00179 break; 00180 } 00181 00182 // 00183 // Set the information field to the number of bytes actually filled in 00184 // 00185 00186 Irp->IoStatus.Information = IrpSp->Parameters.QueryVolume.Length - Length; 00187 00188 } finally { 00189 00190 // 00191 // Release the Vcb. 00192 // 00193 00194 UdfReleaseVcb( IrpContext, Fcb->Vcb ); 00195 } 00196 00197 // 00198 // Complete the request if we didn't raise. 00199 // 00200 00201 UdfCompleteRequest( IrpContext, Irp, Status ); 00202 00203 return Status; 00204 }

00430 : 00431 00432 This routine implements the query volume attribute call. 00433 00434 Arguments: 00435 00436 Vcb - Vcb for this volume. 00437 00438 Buffer - Supplies a pointer to the output buffer where the information 00439 is to be returned 00440 00441 Length - Supplies the length of the buffer in byte. This variable 00442 upon return recieves the remaining bytes free in the buffer 00443 00444 Return Value: 00445 00446 NTSTATUS - Returns the status for the query 00447 00448 --*/ 00449 00450 { 00451 ULONG BytesToCopy; 00452 00453 NTSTATUS Status = STATUS_SUCCESS; 00454 00455 PAGED_CODE(); 00456 00457 // 00458 // Fill out the fixed portion of the buffer. 00459 // 00460 00461 Buffer->FileSystemAttributes = FILE_CASE_SENSITIVE_SEARCH | 00462 FILE_UNICODE_ON_DISK; 00463 00464 Buffer->MaximumComponentNameLength = 255; 00465 00466 *Length -= FIELD_OFFSET( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName ); 00467 00468 // 00469 // Make sure we can copy full unicode characters. 00470 // 00471 00472 ClearFlag( *Length, 1 ); 00473 00474 // 00475 // Determine how much of the file system name will fit. 00476 // 00477 00478 if (*Length >= 6) { 00479 00480 BytesToCopy = 6; 00481 00482 } else { 00483 00484 BytesToCopy = *Length; 00485 Status = STATUS_BUFFER_OVERFLOW; 00486 } 00487 00488 *Length -= BytesToCopy; 00489 00490 // 00491 // Do the file system name. We explicitly share this designation with all 00492 // Microsoft implementations of the UDF filesystem - DO NOT CHANGE! 00493 // 00494 00495 Buffer->FileSystemNameLength = BytesToCopy; 00496 00497 RtlCopyMemory( &Buffer->FileSystemName[0], L"UDF", BytesToCopy ); 00498 00499 // 00500 // And return to our caller 00501 // 00502 00503 return Status; 00504 } }

00372 : 00373 00374 This routine implements the query volume device call. 00375 00376 Arguments: 00377 00378 Vcb - Vcb for this volume. 00379 00380 Buffer - Supplies a pointer to the output buffer where the information 00381 is to be returned 00382 00383 Length - Supplies the length of the buffer in byte. This variable 00384 upon return recieves the remaining bytes free in the buffer 00385 00386 Return Value: 00387 00388 NTSTATUS - Returns the status for the query 00389 00390 --*/ 00391 00392 { 00393 PAGED_CODE(); 00394 00395 // 00396 // Update the output buffer. 00397 // 00398 00399 Buffer->Characteristics = Vcb->TargetDeviceObject->Characteristics; 00400 Buffer->DeviceType = FILE_DEVICE_CD_ROM; 00401 00402 // 00403 // Adjust the length variable 00404 // 00405 00406 *Length -= sizeof( FILE_FS_DEVICE_INFORMATION ); 00407 00408 // 00409 // And return success to our caller 00410 // 00411 00412 return STATUS_SUCCESS; 00413 }

00311 : 00312 00313 This routine implements the query volume size call. 00314 00315 Arguments: 00316 00317 Vcb - Vcb for this volume. 00318 00319 Buffer - Supplies a pointer to the output buffer where the information 00320 is to be returned 00321 00322 Length - Supplies the length of the buffer in byte. This variable 00323 upon return recieves the remaining bytes free in the buffer 00324 00325 Return Value: 00326 00327 NTSTATUS - Returns the status for the query 00328 00329 --*/ 00330 00331 { 00332 PAGED_CODE(); 00333 00334 // 00335 // Fill in the output buffer. 00336 // 00337 00338 Buffer->TotalAllocationUnits.QuadPart = LlBlocksFromBytes( Vcb, Vcb->VolumeDasdFcb->AllocationSize.QuadPart ); 00339 00340 Buffer->AvailableAllocationUnits.QuadPart = 0; 00341 Buffer->SectorsPerAllocationUnit = SectorsFromBytes( Vcb, BlockSize( Vcb )); 00342 Buffer->BytesPerSector = SectorSize( Vcb ); 00343 00344 // 00345 // Adjust the length variable 00346 // 00347 00348 *Length -= sizeof( FILE_FS_SIZE_INFORMATION ); 00349 00350 // 00351 // And return success to our caller 00352 // 00353 00354 return STATUS_SUCCESS; 00355 }

00221 : 00222 00223 This routine implements the query volume info call 00224 00225 Arguments: 00226 00227 Vcb - Vcb for this volume. 00228 00229 Buffer - Supplies a pointer to the output buffer where the information 00230 is to be returned 00231 00232 Length - Supplies the length of the buffer in byte. This variable 00233 upon return recieves the remaining bytes free in the buffer 00234 00235 Return Value: 00236 00237 NTSTATUS - Returns the status for the query 00238 00239 --*/ 00240 00241 { 00242 ULONG BytesToCopy; 00243 00244 NTSTATUS Status = STATUS_SUCCESS; 00245 00246 PAGED_CODE(); 00247 00248 // 00249 // Fill in the data from the Vcb. 00250 // 00251 00252 Buffer->VolumeCreationTime = Vcb->VolumeDasdFcb->Timestamps.CreationTime; 00253 Buffer->VolumeSerialNumber = Vcb->Vpb->SerialNumber; 00254 00255 Buffer->SupportsObjects = FALSE; 00256 00257 *Length -= FIELD_OFFSET( FILE_FS_VOLUME_INFORMATION, VolumeLabel[0] ); 00258 00259 // 00260 // Check if the buffer we're given is long enough 00261 // 00262 00263 if (*Length >= (ULONG) Vcb->Vpb->VolumeLabelLength) { 00264 00265 BytesToCopy = Vcb->Vpb->VolumeLabelLength; 00266 00267 } else { 00268 00269 BytesToCopy = *Length; 00270 00271 Status = STATUS_BUFFER_OVERFLOW; 00272 } 00273 00274 // 00275 // Copy over what we can of the volume label, and adjust *Length 00276 // 00277 00278 Buffer->VolumeLabelLength = BytesToCopy; 00279 00280 if (BytesToCopy) { 00281 00282 RtlCopyMemory( &Buffer->VolumeLabel[0], 00283 &Vcb->Vpb->VolumeLabel[0], 00284 BytesToCopy ); 00285 } 00286 00287 *Length -= BytesToCopy; 00288 00289 // 00290 // Set our status and return to our caller 00291 // 00292 00293 return Status; 00294 }


Defines
#define	BugCheckFileId (UDFS_BUG_CHECK_VOLINFO)
#define	Dbg (UDFS_DEBUG_LEVEL_VOLINFO)
Functions
NTSTATUS	UdfQueryFsVolumeInfo (IN PIRP_CONTEXT IrpContext, IN PVCB Vcb, IN PFILE_FS_VOLUME_INFORMATION Buffer, IN OUT PULONG Length)
NTSTATUS	UdfQueryFsSizeInfo (IN PIRP_CONTEXT IrpContext, IN PVCB Vcb, IN PFILE_FS_SIZE_INFORMATION Buffer, IN OUT PULONG Length)
NTSTATUS	UdfQueryFsDeviceInfo (IN PIRP_CONTEXT IrpContext, IN PVCB Vcb, IN PFILE_FS_DEVICE_INFORMATION Buffer, IN OUT PULONG Length)
NTSTATUS	UdfQueryFsAttributeInfo (IN PIRP_CONTEXT IrpContext, IN PVCB Vcb, IN PFILE_FS_ATTRIBUTE_INFORMATION Buffer, IN OUT PULONG Length)
NTSTATUS	UdfCommonQueryVolInfo (IN PIRP_CONTEXT IrpContext, IN PIRP Irp)

volinfo.c File Reference

Defines

Functions

Define Documentation

Function Documentation