#define NDEBUG
#include "fastfat.h"
+NTSYSAPI
+NTSTATUS
+NTAPI
+RtlUpcaseUnicodeStringToCountedOemString(
+ IN OUT POEM_STRING DestinationString,
+ IN PCUNICODE_STRING SourceString,
+ IN BOOLEAN AllocateDestinationString
+);
+
+
/* FUNCTIONS *****************************************************************/
+IO_STATUS_BLOCK
+NTAPI
+FatiOpenRootDcb(IN PFAT_IRP_CONTEXT IrpContext,
+ IN PFILE_OBJECT FileObject,
+ IN PVCB Vcb,
+ IN PACCESS_MASK DesiredAccess,
+ IN USHORT ShareAccess,
+ IN ULONG CreateDisposition)
+{
+ IO_STATUS_BLOCK Iosb;
+
+ DPRINT1("Opening root directory\n");
+
+ Iosb.Status = STATUS_NOT_IMPLEMENTED;
+
+ return Iosb;
+}
+
+IO_STATUS_BLOCK
+NTAPI
+FatiOpenExistingFile(IN PFAT_IRP_CONTEXT IrpContext,
+ IN PFILE_OBJECT FileObject,
+ IN PVCB Vcb,
+ IN PFCB ParentDcb,
+ IN PACCESS_MASK DesiredAccess,
+ IN USHORT ShareAccess,
+ IN ULONG AllocationSize,
+ IN PFILE_FULL_EA_INFORMATION EaBuffer,
+ IN ULONG EaLength,
+ IN UCHAR FileAttributes,
+ IN ULONG CreateDisposition,
+ IN BOOLEAN IsPagingFile,
+ IN BOOLEAN DeleteOnClose,
+ IN BOOLEAN IsDosName)
+{
+ IO_STATUS_BLOCK Iosb = {{0}};
+ OEM_STRING AnsiName;
+ CHAR AnsiNameBuf[512];
+ PFCB Fcb;
+ NTSTATUS Status;
+ FF_FILE *FileHandle;
+
+ /* Check for create file option and fail */
+ if (CreateDisposition == FILE_CREATE)
+ {
+ Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
+ return Iosb;
+ }
+
+ // TODO: Check more params
+
+ /* Convert the name to ANSI */
+ AnsiName.Buffer = AnsiNameBuf;
+ AnsiName.Length = 0;
+ AnsiName.MaximumLength = sizeof(AnsiNameBuf);
+ RtlZeroMemory(AnsiNameBuf, sizeof(AnsiNameBuf));
+ Status = RtlUpcaseUnicodeStringToCountedOemString(&AnsiName, &FileObject->FileName, FALSE);
+ if (!NT_SUCCESS(Status))
+ {
+ ASSERT(FALSE);
+ }
+
+ /* Open the file with FullFAT */
+ FileHandle = FF_Open(Vcb->Ioman, AnsiName.Buffer, FF_MODE_READ, NULL);
+
+ if (!FileHandle)
+ {
+ Iosb.Status = STATUS_OBJECT_NAME_NOT_FOUND; // FIXME: A shortcut for now
+ return Iosb;
+ }
+
+ /* Create a new FCB for this file */
+ Fcb = FatCreateFcb(IrpContext, Vcb, ParentDcb, FileHandle);
+
+ // TODO: Check if overwrite is needed
+
+ // This is usual file open branch, without overwriting!
+ /* Set context and section object pointers */
+ FatSetFileObject(FileObject,
+ UserFileOpen,
+ Fcb,
+ FatCreateCcb());
+ FileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
+
+ Iosb.Status = STATUS_SUCCESS;
+ Iosb.Information = FILE_OPENED;
+
+ return Iosb;
+}
+
+NTSTATUS
+NTAPI
+FatiCreate(IN PFAT_IRP_CONTEXT IrpContext,
+ IN PIRP Irp)
+{
+ /* Boolean options */
+ BOOLEAN CreateDirectory;
+ BOOLEAN SequentialOnly;
+ BOOLEAN NoIntermediateBuffering;
+ BOOLEAN OpenDirectory;
+ BOOLEAN IsPagingFile;
+ BOOLEAN OpenTargetDirectory;
+ BOOLEAN DirectoryFile;
+ BOOLEAN NonDirectoryFile;
+ BOOLEAN NoEaKnowledge;
+ BOOLEAN DeleteOnClose;
+ BOOLEAN TemporaryFile;
+ ULONG CreateDisposition;
+
+ /* Control blocks */
+ PVCB Vcb, DecodedVcb;
+ PFCB Fcb, NextFcb;
+ PCCB Ccb;
+ PFCB ParentDcb;
+
+ /* IRP data */
+ PFILE_OBJECT FileObject;
+ PFILE_OBJECT RelatedFO;
+ UNICODE_STRING FileName;
+ ULONG AllocationSize;
+ PFILE_FULL_EA_INFORMATION EaBuffer;
+ PACCESS_MASK DesiredAccess;
+ ULONG Options;
+ UCHAR FileAttributes;
+ USHORT ShareAccess;
+ ULONG EaLength;
+
+ /* Misc */
+ NTSTATUS Status;
+ IO_STATUS_BLOCK Iosb;
+ PIO_STACK_LOCATION IrpSp;
+ BOOLEAN EndBackslash = FALSE, OpenedAsDos;
+ UNICODE_STRING RemainingPart, FirstName, NextName;
+ OEM_STRING AnsiFirstName;
+
+ Iosb.Status = STATUS_SUCCESS;
+
+ /* Get current IRP stack location */
+ IrpSp = IoGetCurrentIrpStackLocation(Irp);
+
+ DPRINT1("FatCommonCreate\n", 0 );
+ DPRINT1("Irp = %08lx\n", Irp );
+ DPRINT1("\t->Flags = %08lx\n", Irp->Flags );
+ DPRINT1("\t->FileObject = %08lx\n", IrpSp->FileObject );
+ DPRINT1("\t->RelatedFileObject = %08lx\n", IrpSp->FileObject->RelatedFileObject );
+ DPRINT1("\t->FileName = %wZ\n", &IrpSp->FileObject->FileName );
+ DPRINT1("\t->AllocationSize.LowPart = %08lx\n", Irp->Overlay.AllocationSize.LowPart );
+ DPRINT1("\t->AllocationSize.HighPart = %08lx\n", Irp->Overlay.AllocationSize.HighPart );
+ DPRINT1("\t->SystemBuffer = %08lx\n", Irp->AssociatedIrp.SystemBuffer );
+ DPRINT1("\t->DesiredAccess = %08lx\n", IrpSp->Parameters.Create.SecurityContext->DesiredAccess );
+ DPRINT1("\t->Options = %08lx\n", IrpSp->Parameters.Create.Options );
+ DPRINT1("\t->FileAttributes = %04x\n", IrpSp->Parameters.Create.FileAttributes );
+ DPRINT1("\t->ShareAccess = %04x\n", IrpSp->Parameters.Create.ShareAccess );
+ DPRINT1("\t->EaLength = %08lx\n", IrpSp->Parameters.Create.EaLength );
+
+ /* Apply a special hack for Win32, idea taken from FASTFAT reference driver from WDK */
+ if ((IrpSp->FileObject->FileName.Length > sizeof(WCHAR)) &&
+ (IrpSp->FileObject->FileName.Buffer[1] == L'\\') &&
+ (IrpSp->FileObject->FileName.Buffer[0] == L'\\'))
+ {
+ /* Remove a leading slash */
+ IrpSp->FileObject->FileName.Length -= sizeof(WCHAR);
+ RtlMoveMemory(&IrpSp->FileObject->FileName.Buffer[0],
+ &IrpSp->FileObject->FileName.Buffer[1],
+ IrpSp->FileObject->FileName.Length );
+
+ /* Check again: if there are still two leading slashes,
+ exit with an error */
+ if ((IrpSp->FileObject->FileName.Length > sizeof(WCHAR)) &&
+ (IrpSp->FileObject->FileName.Buffer[1] == L'\\') &&
+ (IrpSp->FileObject->FileName.Buffer[0] == L'\\'))
+ {
+ FatCompleteRequest( IrpContext, Irp, STATUS_OBJECT_NAME_INVALID );
+
+ DPRINT1("FatiCreate: STATUS_OBJECT_NAME_INVALID\n");
+ return STATUS_OBJECT_NAME_INVALID;
+ }
+ }
+
+ /* Make sure we have SecurityContext */
+ ASSERT(IrpSp->Parameters.Create.SecurityContext != NULL);
+
+ /* Get necessary data out of IRP */
+ FileObject = IrpSp->FileObject;
+ FileName = FileObject->FileName;
+ RelatedFO = FileObject->RelatedFileObject;
+ AllocationSize = Irp->Overlay.AllocationSize.LowPart;
+ EaBuffer = Irp->AssociatedIrp.SystemBuffer;
+ DesiredAccess = &IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
+ Options = IrpSp->Parameters.Create.Options;
+ FileAttributes = (UCHAR)(IrpSp->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL);
+ ShareAccess = IrpSp->Parameters.Create.ShareAccess;
+ EaLength = IrpSp->Parameters.Create.EaLength;
+
+ /* Set VPB to related object's VPB if it exists */
+ if (RelatedFO)
+ FileObject->Vpb = RelatedFO->Vpb;
+
+ /* Prepare file attributes mask */
+ FileAttributes &= (FILE_ATTRIBUTE_READONLY |
+ FILE_ATTRIBUTE_HIDDEN |
+ FILE_ATTRIBUTE_SYSTEM |
+ FILE_ATTRIBUTE_ARCHIVE);
+
+ /* Get the volume control object */
+ Vcb = &((PVOLUME_DEVICE_OBJECT)IrpSp->DeviceObject)->Vcb;
+
+ /* Get options */
+ DirectoryFile = BooleanFlagOn(Options, FILE_DIRECTORY_FILE);
+ NonDirectoryFile = BooleanFlagOn(Options, FILE_NON_DIRECTORY_FILE);
+ SequentialOnly = BooleanFlagOn(Options, FILE_SEQUENTIAL_ONLY);
+ NoIntermediateBuffering = BooleanFlagOn(Options, FILE_NO_INTERMEDIATE_BUFFERING);
+ NoEaKnowledge = BooleanFlagOn(Options, FILE_NO_EA_KNOWLEDGE);
+ DeleteOnClose = BooleanFlagOn(Options, FILE_DELETE_ON_CLOSE);
+ TemporaryFile = BooleanFlagOn(IrpSp->Parameters.Create.FileAttributes,
+ FILE_ATTRIBUTE_TEMPORARY );
+ IsPagingFile = BooleanFlagOn(IrpSp->Flags, SL_OPEN_PAGING_FILE);
+ OpenTargetDirectory = BooleanFlagOn(IrpSp->Flags, SL_OPEN_TARGET_DIRECTORY);
+
+ /* Calculate create disposition */
+ CreateDisposition = (Options >> 24) & 0x000000ff;
+
+ /* Get Create/Open directory flags based on it */
+ CreateDirectory = (BOOLEAN)(DirectoryFile &&
+ ((CreateDisposition == FILE_CREATE) ||
+ (CreateDisposition == FILE_OPEN_IF)));
+
+ OpenDirectory = (BOOLEAN)(DirectoryFile &&
+ ((CreateDisposition == FILE_OPEN) ||
+ (CreateDisposition == FILE_OPEN_IF)));
+
+ /* Validate parameters: directory/nondirectory mismatch and
+ AllocationSize being more than 4GB */
+ if ((DirectoryFile && NonDirectoryFile) ||
+ Irp->Overlay.AllocationSize.HighPart != 0)
+ {
+ FatCompleteRequest(IrpContext, Irp, STATUS_INVALID_PARAMETER);
+
+ DPRINT1("FatiCreate: STATUS_INVALID_PARAMETER\n", 0);
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ /* Acquire the VCB lock exclusively */
+ if (!FatAcquireExclusiveVcb(IrpContext, Vcb))
+ {
+ // TODO: Postpone the IRP for later processing
+ ASSERT(FALSE);
+ return STATUS_NOT_IMPLEMENTED;
+ }
+
+ // TODO: Verify the VCB
+
+ /* If VCB is locked, then no file openings are possible */
+ if (Vcb->State & VCB_STATE_FLAG_LOCKED)
+ {
+ DPRINT1("This volume is locked\n");
+ Status = STATUS_ACCESS_DENIED;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ return Status;
+ }
+
+ // TODO: Check if the volume is write protected and disallow DELETE_ON_CLOSE
+
+ // TODO: Make sure EAs aren't supported on FAT32
+
+ /* Check if it's a volume open request */
+ if (FileName.Length == 0)
+ {
+ /* Test related FO to be sure */
+ if (!RelatedFO ||
+ FatDecodeFileObject(RelatedFO, &DecodedVcb, &Fcb, &Ccb) == UserVolumeOpen)
+ {
+ /* It is indeed a volume open request */
+ DPRINT1("Volume open request, not implemented now!\n");
+ UNIMPLEMENTED;
+ }
+ }
+
+ /* Check if this is a relative open */
+ if (RelatedFO)
+ {
+ // RelatedFO will be a parent directory
+ UNIMPLEMENTED;
+ }
+ else
+ {
+ /* Absolute open */
+ if ((FileName.Length == sizeof(WCHAR)) &&
+ (FileName.Buffer[0] == L'\\'))
+ {
+ /* Check if it's ok to open it */
+ if (NonDirectoryFile)
+ {
+ DPRINT1("Trying to open root dir as a file\n");
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ return STATUS_FILE_IS_A_DIRECTORY;
+ }
+
+ /* Check delete on close on a root dir */
+ if (DeleteOnClose)
+ {
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ return STATUS_CANNOT_DELETE;
+ }
+
+ /* Call root directory open routine */
+ Iosb = FatiOpenRootDcb(IrpContext,
+ FileObject,
+ Vcb,
+ DesiredAccess,
+ ShareAccess,
+ CreateDisposition);
+
+ Irp->IoStatus.Information = Iosb.Information;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ return Iosb.Status;
+ }
+ else
+ {
+ /* Not a root dir */
+ ParentDcb = Vcb->RootDcb;
+ DPRINT1("ParentDcb %p\n", ParentDcb);
+ }
+
+ /* Check for backslash at the end */
+ if (FileName.Length &&
+ FileName.Buffer[FileName.Length / sizeof(WCHAR) - 1] == L'\\')
+ {
+ /* Cut it out */
+ FileName.Length -= sizeof(WCHAR);
+
+ /* Remember we cut it */
+ EndBackslash = TRUE;
+ }
+
+ /* Ensure the name is set */
+ if (!ParentDcb->FullFileName.Buffer)
+ {
+ DPRINT1("ParentDcb->FullFileName.Buffer is NULL\n");
+ }
+
+ /* Check max path length */
+ if (ParentDcb->FullFileName.Length + FileName.Length + sizeof(WCHAR) <= FileName.Length)
+ {
+ DPRINT1("Max length is way off\n");
+ Iosb.Status = STATUS_OBJECT_NAME_INVALID;
+ ASSERT(FALSE);
+ }
+
+ /* Loop through FCBs to find a good one */
+ while (TRUE)
+ {
+ Fcb = ParentDcb;
+
+ /* Dissect the name */
+ RemainingPart = FileName;
+ while (RemainingPart.Length)
+ {
+ FsRtlDissectName(RemainingPart, &FirstName, &NextName);
+
+ /* Check for validity */
+ if ((NextName.Length && NextName.Buffer[0] == L'\\') ||
+ (NextName.Length > 255 * sizeof(WCHAR)))
+ {
+ /* The name is invalid */
+ DPRINT1("Invalid name found\n");
+ Iosb.Status = STATUS_OBJECT_NAME_INVALID;
+ ASSERT(FALSE);
+ }
+
+ /* Convert the name to ANSI */
+ AnsiFirstName.Buffer = ExAllocatePool(PagedPool, FirstName.Length);
+ AnsiFirstName.Length = 0;
+ AnsiFirstName.MaximumLength = FirstName.Length;
+ Status = RtlUpcaseUnicodeStringToCountedOemString(&AnsiFirstName, &FirstName, FALSE);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("RtlUpcaseUnicodeStringToCountedOemString() failed with 0x%08x\n", Status);
+ ASSERT(FALSE);
+ NextFcb = NULL;
+ AnsiFirstName.Length = 0;
+ }
+ else
+ {
+ /* Find the coresponding FCB */
+ NextFcb = FatFindFcb(IrpContext,
+ &Fcb->Dcb.SplayLinksAnsi,
+ (PSTRING)&AnsiFirstName,
+ &OpenedAsDos);
+ }
+
+ /* Check if we found anything */
+ if (!NextFcb && Fcb->Dcb.SplayLinksUnicode)
+ {
+ ASSERT(FALSE);
+ }
+
+ /* Move to the next FCB */
+ if (NextFcb)
+ {
+ Fcb = NextFcb;
+ RemainingPart = NextName;
+ }
+
+ /* Break out of this loop if nothing can be found */
+ if (!NextFcb ||
+ NextName.Length == 0 ||
+ FatNodeType(NextFcb) == FAT_NTC_FCB)
+ {
+ break;
+ }
+ }
+
+ /* Ensure remaining name doesn't start from a backslash */
+ if (RemainingPart.Length &&
+ RemainingPart.Buffer[0] == L'\\')
+ {
+ /* Cut it */
+ RemainingPart.Buffer++;
+ RemainingPart.Length -= sizeof(WCHAR);
+ }
+
+ if (Fcb->Condition == FcbGood)
+ {
+ /* Good FCB, break out of the loop */
+ break;
+ }
+ else
+ {
+ ASSERT(FALSE);
+ }
+ }
+
+ /* We have a valid FCB now */
+ if (!RemainingPart.Length)
+ {
+ DPRINT1("It's possible to open an existing FCB\n");
+ ASSERT(FALSE);
+ }
+
+ /* During parsing we encountered a part which has no attached FCB/DCB.
+ Check that the parent is really DCB and not FCB */
+ if (FatNodeType(Fcb) != FAT_NTC_ROOT_DCB &&
+ FatNodeType(Fcb) != FAT_NTC_DCB)
+ {
+ DPRINT1("Weird FCB node type %x, expected DCB or root DCB\n", FatNodeType(Fcb));
+ ASSERT(FALSE);
+ }
+
+ /* Create additional DCBs for all path items */
+ ParentDcb = Fcb;
+ while (TRUE)
+ {
+ FsRtlDissectName(RemainingPart, &FirstName, &RemainingPart);
+
+ /* Check for validity */
+ if ((RemainingPart.Length && RemainingPart.Buffer[0] == L'\\') ||
+ (NextName.Length > 255 * sizeof(WCHAR)))
+ {
+ /* The name is invalid */
+ DPRINT1("Invalid name found\n");
+ Iosb.Status = STATUS_OBJECT_NAME_INVALID;
+ ASSERT(FALSE);
+ }
+
+ /* Convert the name to ANSI */
+ AnsiFirstName.Buffer = ExAllocatePool(PagedPool, FirstName.Length);
+ AnsiFirstName.Length = 0;
+ AnsiFirstName.MaximumLength = FirstName.Length;
+ Status = RtlUpcaseUnicodeStringToCountedOemString(&AnsiFirstName, &FirstName, FALSE);
+
+ if (!NT_SUCCESS(Status))
+ {
+ ASSERT(FALSE);
+ }
+
+ DPRINT1("FirstName %wZ, RemainingPart %wZ\n", &FirstName, &RemainingPart);
+
+ /* Break if came to the end */
+ if (!RemainingPart.Length) break;
+
+ /* Create a DCB for this entry */
+ ParentDcb = FatCreateDcb(IrpContext,
+ Vcb,
+ ParentDcb);
+
+ /* Set its name */
+ FatSetFullNameInFcb(ParentDcb, &FirstName);
+ }
+
+ // TODO: Try to open directory
+
+ /* If end backslash here, then it's definately not permitted,
+ since we're opening files here */
+ if (EndBackslash)
+ {
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ Iosb.Status = STATUS_OBJECT_NAME_INVALID;
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+ return Iosb.Status;
+ }
+
+ /* Try to open the file */
+ Iosb = FatiOpenExistingFile(IrpContext,
+ FileObject,
+ Vcb,
+ ParentDcb,
+ DesiredAccess,
+ ShareAccess,
+ AllocationSize,
+ EaBuffer,
+ EaLength,
+ FileAttributes,
+ CreateDisposition,
+ FALSE,
+ DeleteOnClose,
+ OpenedAsDos);
+
+ Irp->IoStatus.Information = Iosb.Information;
+ }
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+
+ return Iosb.Status;
+}
+
NTSTATUS
NTAPI
FatCreate(PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
+ PFAT_IRP_CONTEXT IrpContext;
+ NTSTATUS Status;
+
DPRINT1("FatCreate()\n");
- return STATUS_NOT_IMPLEMENTED;
+
+ /* If it's called with our Disk FS device object - it's always open */
+ // TODO: Add check for CDROM FS device object
+ if (DeviceObject == FatGlobalData.DiskDeviceObject)
+ {
+ /* Complete the request and return success */
+ Irp->IoStatus.Status = STATUS_SUCCESS;
+ Irp->IoStatus.Information = FILE_OPENED;
+
+ IoCompleteRequest(Irp, IO_DISK_INCREMENT);
+
+ return STATUS_SUCCESS;
+ }
+
+ /* Enter FsRtl critical region */
+ FsRtlEnterFileSystem();
+
+ /* Build an irp context */
+ IrpContext = FatBuildIrpContext(Irp, TRUE);
+
+ /* Call internal function */
+ Status = FatiCreate(IrpContext, Irp);
+
+ /* Leave FsRtl critical region */
+ FsRtlExitFileSystem();
+
+ return Status;
}
/* EOF */
projects / reactos.git / blobdiff