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[fastfat_new]
- Start implementing one of the most massive IFS driver routines - IRP_MJ_CREATE handler. Right now it just does some preliminary work, deciphers all options, prepares all variables, prints out debug stuff. svn path=/trunk/; revision=43199
This commit is contained in:
Aleksey Bragin
parent
e19fb94e99
commit
5fced5449b
1 changed files with 168 additions and 1 deletions
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@ -13,12 +13,179 @@
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/* FUNCTIONS *****************************************************************/
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NTSTATUS
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NTAPI
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FatiCreate(IN PFAT_IRP_CONTEXT IrpContext,
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IN PIRP Irp)
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{
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/* Boolean options */
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BOOLEAN CreateDirectory;
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BOOLEAN SequentialOnly;
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BOOLEAN NoIntermediateBuffering;
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BOOLEAN OpenDirectory;
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BOOLEAN IsPagingFile;
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BOOLEAN OpenTargetDirectory;
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BOOLEAN DirectoryFile;
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BOOLEAN NonDirectoryFile;
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BOOLEAN NoEaKnowledge;
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BOOLEAN DeleteOnClose;
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BOOLEAN TemporaryFile;
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ULONG CreateDisposition;
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/* Control blocks */
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PVCB Vcb;
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/* IRP data */
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PFILE_OBJECT FileObject;
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PFILE_OBJECT RelatedFO;
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UNICODE_STRING FileName;
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ULONG AllocationSize;
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PFILE_FULL_EA_INFORMATION EaBuffer;
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PACCESS_MASK DesiredAccess;
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ULONG Options;
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UCHAR FileAttributes;
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USHORT ShareAccess;
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ULONG EaLength;
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/* Misc */
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//NTSTATUS Status;
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IO_STATUS_BLOCK Iosb;
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PIO_STACK_LOCATION IrpSp;
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/* Get current IRP stack location */
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IrpSp = IoGetCurrentIrpStackLocation(Irp);
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DPRINT1("FatCommonCreate\n", 0 );
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DPRINT1("Irp = %08lx\n", Irp );
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DPRINT1("\t->Flags = %08lx\n", Irp->Flags );
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DPRINT1("\t->FileObject = %08lx\n", IrpSp->FileObject );
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DPRINT1("\t->RelatedFileObject = %08lx\n", IrpSp->FileObject->RelatedFileObject );
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DPRINT1("\t->FileName = %wZ\n", &IrpSp->FileObject->FileName );
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DPRINT1("\t->AllocationSize.LowPart = %08lx\n", Irp->Overlay.AllocationSize.LowPart );
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DPRINT1("\t->AllocationSize.HighPart = %08lx\n", Irp->Overlay.AllocationSize.HighPart );
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DPRINT1("\t->SystemBuffer = %08lx\n", Irp->AssociatedIrp.SystemBuffer );
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DPRINT1("\t->DesiredAccess = %08lx\n", IrpSp->Parameters.Create.SecurityContext->DesiredAccess );
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DPRINT1("\t->Options = %08lx\n", IrpSp->Parameters.Create.Options );
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DPRINT1("\t->FileAttributes = %04x\n", IrpSp->Parameters.Create.FileAttributes );
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DPRINT1("\t->ShareAccess = %04x\n", IrpSp->Parameters.Create.ShareAccess );
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DPRINT1("\t->EaLength = %08lx\n", IrpSp->Parameters.Create.EaLength );
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/* Apply a special hack for Win32, idea taken from FASTFAT reference driver from WDK */
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if ((IrpSp->FileObject->FileName.Length > sizeof(WCHAR)) &&
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(IrpSp->FileObject->FileName.Buffer[1] == L'\\') &&
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(IrpSp->FileObject->FileName.Buffer[0] == L'\\'))
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{
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/* Remove two leading slashes */
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IrpSp->FileObject->FileName.Length -= sizeof(WCHAR);
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RtlMoveMemory(&IrpSp->FileObject->FileName.Buffer[0],
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&IrpSp->FileObject->FileName.Buffer[1],
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IrpSp->FileObject->FileName.Length );
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/* If there are two leading slashes again, exit */
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if ((IrpSp->FileObject->FileName.Length > sizeof(WCHAR)) &&
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(IrpSp->FileObject->FileName.Buffer[1] == L'\\') &&
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(IrpSp->FileObject->FileName.Buffer[0] == L'\\'))
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{
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FatCompleteRequest( IrpContext, Irp, STATUS_OBJECT_NAME_INVALID );
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DPRINT1("FatiCreate: STATUS_OBJECT_NAME_INVALID\n");
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return STATUS_OBJECT_NAME_INVALID;
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}
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}
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/* Make sure we have SecurityContext */
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ASSERT(IrpSp->Parameters.Create.SecurityContext != NULL);
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/* Get necessary data out of IRP */
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FileObject = IrpSp->FileObject;
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FileName = FileObject->FileName;
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RelatedFO = FileObject->RelatedFileObject;
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AllocationSize = Irp->Overlay.AllocationSize.LowPart;
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EaBuffer = Irp->AssociatedIrp.SystemBuffer;
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DesiredAccess = &IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
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Options = IrpSp->Parameters.Create.Options;
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FileAttributes = (UCHAR)(IrpSp->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL);
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ShareAccess = IrpSp->Parameters.Create.ShareAccess;
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EaLength = IrpSp->Parameters.Create.EaLength;
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/* Set VPB to related object's VPB if it exists */
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if (RelatedFO)
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FileObject->Vpb = RelatedFO->Vpb;
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/* Prepare file attributes mask */
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FileAttributes &= (FILE_ATTRIBUTE_READONLY |
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FILE_ATTRIBUTE_HIDDEN |
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FILE_ATTRIBUTE_SYSTEM |
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FILE_ATTRIBUTE_ARCHIVE);
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/* Get the volume control object */
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Vcb = &((PVOLUME_DEVICE_OBJECT)IrpSp->DeviceObject)->Vcb;
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/* Get options */
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DirectoryFile = BooleanFlagOn(Options, FILE_DIRECTORY_FILE);
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NonDirectoryFile = BooleanFlagOn(Options, FILE_NON_DIRECTORY_FILE);
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SequentialOnly = BooleanFlagOn(Options, FILE_SEQUENTIAL_ONLY);
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NoIntermediateBuffering = BooleanFlagOn(Options, FILE_NO_INTERMEDIATE_BUFFERING);
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NoEaKnowledge = BooleanFlagOn(Options, FILE_NO_EA_KNOWLEDGE);
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DeleteOnClose = BooleanFlagOn(Options, FILE_DELETE_ON_CLOSE);
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TemporaryFile = BooleanFlagOn(IrpSp->Parameters.Create.FileAttributes,
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FILE_ATTRIBUTE_TEMPORARY );
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IsPagingFile = BooleanFlagOn(IrpSp->Flags, SL_OPEN_PAGING_FILE);
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OpenTargetDirectory = BooleanFlagOn(IrpSp->Flags, SL_OPEN_TARGET_DIRECTORY);
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/* Calculate create disposition */
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CreateDisposition = (Options >> 24) & 0x000000ff;
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/* Get Create/Open directory flags based on it */
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CreateDirectory = (BOOLEAN)(DirectoryFile &&
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((CreateDisposition == FILE_CREATE) ||
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(CreateDisposition == FILE_OPEN_IF)));
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OpenDirectory = (BOOLEAN)(DirectoryFile &&
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((CreateDisposition == FILE_OPEN) ||
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(CreateDisposition == FILE_OPEN_IF)));
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//return Iosb.Status;
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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FatCreate(PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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PFAT_IRP_CONTEXT IrpContext;
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NTSTATUS Status;
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//PVOLUME_DEVICE_OBJECT VolumeDO = (PVOLUME_DEVICE_OBJECT)DeviceObject;
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DPRINT1("FatCreate()\n");
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return STATUS_NOT_IMPLEMENTED;
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/* If it's called with our Disk FS device object - it's always open */
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// TODO: Add check for CDROM FS device object
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if (DeviceObject == FatGlobalData.DiskDeviceObject)
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{
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/* Complete the request and return success */
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Irp->IoStatus.Status = STATUS_SUCCESS;
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Irp->IoStatus.Information = FILE_OPENED;
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IoCompleteRequest(Irp, IO_DISK_INCREMENT);
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return STATUS_SUCCESS;
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}
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/* Enter FsRtl critical region */
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FsRtlEnterFileSystem();
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/* Build an irp context */
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IrpContext = FatBuildIrpContext(Irp, TRUE);
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/* Call internal function */
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Status = FatiCreate(IrpContext, Irp);
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/* Leave FsRtl critical region */
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FsRtlExitFileSystem();
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return Status;
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}
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/* EOF */
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