/*
* PROJECT: ReactOS FAT file system driver
- * LICENSE: GPL - See COPYING in the top level directory
+ * LICENSE: GNU GPLv3 as published by the Free Software Foundation
* FILE: drivers/filesystems/fastfat/create.c
* PURPOSE: Create routines
* PROGRAMMERS: Aleksey Bragin (aleksey@reactos.org)
/* 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;
+ PFCB Dcb;
+ NTSTATUS Status;
+ PCCB Ccb;
+
+ /* Reference our DCB */
+ Dcb = Vcb->RootDcb;
+
+ DPRINT("Opening root directory\n");
+
+ /* Exclusively lock this DCB */
+ (VOID)FatAcquireExclusiveFcb(IrpContext, Dcb);
+
+ do
+ {
+ /* Validate parameters */
+ if (CreateDisposition != FILE_OPEN &&
+ CreateDisposition != FILE_OPEN_IF)
+ {
+ Iosb.Status = STATUS_ACCESS_DENIED;
+ break;
+ }
+
+ // TODO: Check file access
+
+ /* Is it a first time open? */
+ if (Dcb->OpenCount == 0)
+ {
+ /* Set share access */
+ IoSetShareAccess(*DesiredAccess,
+ ShareAccess,
+ FileObject,
+ &Dcb->ShareAccess);
+ }
+ else
+ {
+ /* Check share access */
+ Status = IoCheckShareAccess(*DesiredAccess,
+ ShareAccess,
+ FileObject,
+ &Dcb->ShareAccess,
+ TRUE);
+ }
+
+ /* Set file object pointers */
+ Ccb = FatCreateCcb();
+ FatSetFileObject(FileObject, UserDirectoryOpen, Dcb, Ccb);
+
+ /* Increment counters */
+ Dcb->OpenCount++;
+ Dcb->UncleanCount++;
+ Vcb->OpenFileCount++;
+ if (IsFileObjectReadOnly(FileObject)) Vcb->ReadOnlyCount++;
+
+ /* Set success statuses */
+ Iosb.Status = STATUS_SUCCESS;
+ Iosb.Information = FILE_OPENED;
+ } while (FALSE);
+
+ /* Release the DCB lock */
+ FatReleaseFcb(IrpContext, Dcb);
+
+ return Iosb;
+}
+
+FF_ERROR
+NTAPI
+FatiTryToOpen(IN PFILE_OBJECT FileObject,
+ IN PVCB Vcb)
+{
+ OEM_STRING AnsiName;
+ CHAR AnsiNameBuf[512];
+ FF_ERROR Error;
+ NTSTATUS Status;
+ FF_FILE *FileHandle;
+
+ /* 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, &Error);
+
+ /* Close the handle */
+ if (FileHandle) FF_Close(FileHandle);
+
+ /* Return status */
+ return Error;
+}
+
+IO_STATUS_BLOCK
+NTAPI
+FatiOverwriteFile(PFAT_IRP_CONTEXT IrpContext,
+ PFILE_OBJECT FileObject,
+ PFCB Fcb,
+ ULONG AllocationSize,
+ PFILE_FULL_EA_INFORMATION EaBuffer,
+ ULONG EaLength,
+ UCHAR FileAttributes,
+ ULONG CreateDisposition,
+ BOOLEAN NoEaKnowledge)
+{
+ IO_STATUS_BLOCK Iosb = {{0}};
+ PCCB Ccb;
+ LARGE_INTEGER Zero;
+ ULONG NotifyFilter;
+
+ Zero.QuadPart = 0;
+
+ /* Check Ea mismatch first */
+ if (NoEaKnowledge && EaLength > 0)
+ {
+ Iosb.Status = STATUS_ACCESS_DENIED;
+ return Iosb;
+ }
+
+ do
+ {
+ /* Check if it's not still mapped */
+ if (!MmCanFileBeTruncated(&Fcb->SectionObjectPointers,
+ &Zero))
+ {
+ /* Fail */
+ Iosb.Status = STATUS_USER_MAPPED_FILE;
+ break;
+ }
+
+ /* Set file object pointers */
+ Ccb = FatCreateCcb();
+ FatSetFileObject(FileObject,
+ UserFileOpen,
+ Fcb,
+ Ccb);
+
+ FileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
+
+ /* Indicate that create is in progress */
+ Fcb->Vcb->State |= VCB_STATE_CREATE_IN_PROGRESS;
+
+ /* Purge the cache section */
+ CcPurgeCacheSection(&Fcb->SectionObjectPointers, NULL, 0, FALSE);
+
+ /* Add Eas */
+ if (EaLength > 0)
+ {
+ ASSERT(FALSE);
+ }
+
+ /* Acquire the paging resource */
+ (VOID)ExAcquireResourceExclusiveLite(Fcb->Header.PagingIoResource, TRUE);
+
+ /* Initialize FCB header */
+ Fcb->Header.FileSize.QuadPart = 0;
+ Fcb->Header.ValidDataLength.QuadPart = 0;
+
+ /* Let CC know about changed file size */
+ CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&Fcb->Header.AllocationSize);
+
+ // TODO: Actually truncate the file
+ DPRINT1("TODO: Actually truncate file '%wZ' with a fullfat handle %x\n", &Fcb->FullFileName, Fcb->FatHandle);
+
+ /* Release the paging resource */
+ ExReleaseResourceLite(Fcb->Header.PagingIoResource);
+
+ /* Specify truncate on close */
+ Fcb->State |= FCB_STATE_TRUNCATE_ON_CLOSE;
+
+ // TODO: Delete previous EA if needed
+
+ /* Send notification about changes */
+ NotifyFilter = FILE_NOTIFY_CHANGE_LAST_WRITE |
+ FILE_NOTIFY_CHANGE_ATTRIBUTES |
+ FILE_NOTIFY_CHANGE_SIZE;
+
+ FsRtlNotifyFullReportChange(Fcb->Vcb->NotifySync,
+ &Fcb->Vcb->NotifyList,
+ (PSTRING)&Fcb->FullFileName,
+ Fcb->FullFileName.Length - Fcb->FileNameLength,
+ NULL,
+ NULL,
+ NotifyFilter,
+ FILE_ACTION_MODIFIED,
+ NULL);
+
+ /* Set success status */
+ Iosb.Status = STATUS_SUCCESS;
+
+ /* Set correct information code */
+ Iosb.Information = (CreateDisposition == FILE_SUPERSEDE) ? FILE_SUPERSEDED : FILE_OVERWRITTEN;
+ } while (0);
+
+ /* Remove the create in progress flag */
+ ClearFlag(Fcb->Vcb->State, VCB_STATE_CREATE_IN_PROGRESS);
+
+ return Iosb;
+}
+
+IO_STATUS_BLOCK
+NTAPI
+FatiOpenExistingDir(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 DeleteOnClose)
+{
+ IO_STATUS_BLOCK Iosb = {{0}};
+ OEM_STRING AnsiName;
+ CHAR AnsiNameBuf[512];
+ PFCB Fcb;
+ NTSTATUS Status;
+ FF_FILE *FileHandle;
+
+ /* Only open is permitted */
+ if (CreateDisposition != FILE_OPEN &&
+ CreateDisposition != FILE_OPEN_IF)
+ {
+ Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
+ return Iosb;
+ }
+
+ // TODO: Check dir access
+
+ /* 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 dir with FullFAT */
+ FileHandle = FF_Open(Vcb->Ioman, AnsiName.Buffer, FF_MODE_DIR, NULL);
+
+ if (!FileHandle)
+ {
+ Iosb.Status = STATUS_OBJECT_NAME_NOT_FOUND; // FIXME: A shortcut for now
+ return Iosb;
+ }
+
+ /* Create a new DCB for this directory */
+ Fcb = FatCreateDcb(IrpContext, Vcb, ParentDcb, FileHandle);
+
+ /* Set share access */
+ IoSetShareAccess(*DesiredAccess, ShareAccess, FileObject, &Fcb->ShareAccess);
+
+ /* Set context and section object pointers */
+ FatSetFileObject(FileObject,
+ UserDirectoryOpen,
+ Fcb,
+ FatCreateCcb());
+
+ /* Increase counters */
+ Fcb->UncleanCount++;
+ Fcb->OpenCount++;
+ Vcb->OpenFileCount++;
+ if (IsFileObjectReadOnly(FileObject)) Vcb->ReadOnlyCount++;
+
+ Iosb.Status = STATUS_SUCCESS;
+ Iosb.Information = FILE_OPENED;
+
+ DPRINT1("Successfully opened dir %s\n", AnsiNameBuf);
+
+ 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;
+ FF_ERROR FfError;
+
+ /* 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, &FfError);
+
+ if (!FileHandle)
+ {
+ DPRINT1("Failed to open file '%s', error %ld\n", AnsiName.Buffer, FfError);
+ Iosb.Status = STATUS_OBJECT_NAME_NOT_FOUND; // FIXME: A shortcut for now
+ return Iosb;
+ }
+ DPRINT1("Succeeded opening file '%s'\n", AnsiName.Buffer);
+
+ /* Create a new FCB for this file */
+ Fcb = FatCreateFcb(IrpContext, Vcb, ParentDcb, FileHandle);
+
+ // TODO: Check if overwrite is needed
+
+ // TODO: 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;
+
+
+ /* Increase counters */
+ Fcb->UncleanCount++;
+ Fcb->OpenCount++;
+ if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) Fcb->NonCachedUncleanCount++;
+ if (IsFileObjectReadOnly(FileObject)) Vcb->ReadOnlyCount++;
+
+ return Iosb;
+}
+
+IO_STATUS_BLOCK
+NTAPI
+FatiOpenVolume(IN PFAT_IRP_CONTEXT IrpContext,
+ IN PFILE_OBJECT FileObject,
+ IN PVCB Vcb,
+ IN PACCESS_MASK DesiredAccess,
+ IN USHORT ShareAccess,
+ IN ULONG CreateDisposition)
+{
+ PCCB Ccb;
+ IO_STATUS_BLOCK Iosb = {{0}};
+ BOOLEAN VolumeFlushed = FALSE;
+
+ /* Check parameters */
+ if (CreateDisposition != FILE_OPEN &&
+ CreateDisposition != FILE_OPEN_IF)
+ {
+ /* Deny access */
+ Iosb.Status = STATUS_ACCESS_DENIED;
+ }
+
+ /* Check if it's exclusive open */
+ if (!FlagOn(ShareAccess, FILE_SHARE_WRITE) &&
+ !FlagOn(ShareAccess, FILE_SHARE_DELETE))
+ {
+ // TODO: Check if exclusive read access requested
+ // and opened handles count is not 0
+ //if (!FlagOn(ShareAccess, FILE_SHARE_READ)
+
+ DPRINT1("Exclusive volume open\n");
+
+ // TODO: Flush the volume
+ VolumeFlushed = TRUE;
+ }
+ else if (FlagOn(*DesiredAccess, FILE_READ_DATA | FILE_WRITE_DATA | FILE_APPEND_DATA))
+ {
+ DPRINT1("Shared open\n");
+
+ // TODO: Flush the volume
+ VolumeFlushed = TRUE;
+ }
+
+ if (VolumeFlushed &&
+ !FlagOn(Vcb->State, VCB_STATE_MOUNTED_DIRTY) &&
+ FlagOn(Vcb->State, VCB_STATE_FLAG_DIRTY) &&
+ CcIsThereDirtyData(Vcb->Vpb))
+ {
+ UNIMPLEMENTED;
+ }
+
+ /* Set share access */
+ if (Vcb->DirectOpenCount > 0)
+ {
+ /* This volume has already been opened */
+ Iosb.Status = IoCheckShareAccess(*DesiredAccess,
+ ShareAccess,
+ FileObject,
+ &Vcb->ShareAccess,
+ TRUE);
+
+ if (!NT_SUCCESS(Iosb.Status))
+ {
+ ASSERT(FALSE);
+ }
+ }
+ else
+ {
+ /* This is the first time open */
+ IoSetShareAccess(*DesiredAccess,
+ ShareAccess,
+ FileObject,
+ &Vcb->ShareAccess);
+ }
+
+ /* Set file object pointers */
+ Ccb = FatCreateCcb();
+ FatSetFileObject(FileObject, UserVolumeOpen, Vcb, Ccb);
+ FileObject->SectionObjectPointer = &Vcb->SectionObjectPointers;
+
+ /* Increase direct open count */
+ Vcb->DirectOpenCount++;
+ Vcb->OpenFileCount++;
+ if (IsFileObjectReadOnly(FileObject)) Vcb->ReadOnlyCount++;
+
+ /* Set no buffering flag */
+ FileObject->Flags |= FO_NO_INTERMEDIATE_BUFFERING;
+
+ // TODO: User's access check
+
+ 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, RelatedVcb;
+ PFCB Fcb, NextFcb, RelatedDcb;
+ PCCB Ccb, RelatedCcb;
+ 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, FirstRun = TRUE;
+ UNICODE_STRING RemainingPart, FirstName, NextName, FileNameUpcased;
+ OEM_STRING AnsiFirstName;
+ FF_ERROR FfError;
+ TYPE_OF_OPEN TypeOfOpen;
+ BOOLEAN OplockPostIrp = FALSE;
+
+ Iosb.Status = STATUS_SUCCESS;
+
+ /* Get current IRP stack location */
+ IrpSp = IoGetCurrentIrpStackLocation(Irp);
+
+ DPRINT("FatCommonCreate\n", 0 );
+ DPRINT("Irp = %08lx\n", Irp );
+ DPRINT("\t->Flags = %08lx\n", Irp->Flags );
+ DPRINT("\t->FileObject = %08lx\n", IrpSp->FileObject );
+ DPRINT("\t->RelatedFileObject = %08lx\n", IrpSp->FileObject->RelatedFileObject );
+ DPRINT("\t->FileName = %wZ\n", &IrpSp->FileObject->FileName );
+ DPRINT("\t->AllocationSize.LowPart = %08lx\n", Irp->Overlay.AllocationSize.LowPart );
+ DPRINT("\t->AllocationSize.HighPart = %08lx\n", Irp->Overlay.AllocationSize.HighPart );
+ DPRINT("\t->SystemBuffer = %08lx\n", Irp->AssociatedIrp.SystemBuffer );
+ DPRINT("\t->DesiredAccess = %08lx\n", IrpSp->Parameters.Create.SecurityContext->DesiredAccess );
+ DPRINT("\t->Options = %08lx\n", IrpSp->Parameters.Create.Options );
+ DPRINT("\t->FileAttributes = %04x\n", IrpSp->Parameters.Create.FileAttributes );
+ DPRINT("\t->ShareAccess = %04x\n", IrpSp->Parameters.Create.ShareAccess );
+ DPRINT("\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;
+
+ /* Reject open by id */
+ if (Options & FILE_OPEN_BY_FILE_ID)
+ {
+ FatCompleteRequest(IrpContext, Irp, STATUS_INVALID_PARAMETER);
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ /* 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;
+
+ /* Set volume dismount status */
+ if (Vcb->Condition != VcbGood)
+ Status = STATUS_VOLUME_DISMOUNTED;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ FatCompleteRequest(IrpContext, Irp, Status);
+ return Status;
+ }
+
+ /* Check if the volume is write protected and disallow DELETE_ON_CLOSE */
+ if (DeleteOnClose & FlagOn(Vcb->State, VCB_STATE_FLAG_WRITE_PROTECTED))
+ {
+ ASSERT(FALSE);
+ return STATUS_NOT_IMPLEMENTED;
+ }
+
+ // 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)
+ {
+ /* Check parameters */
+ if (DirectoryFile || OpenTargetDirectory)
+ {
+ Status = DirectoryFile ? STATUS_NOT_A_DIRECTORY : STATUS_INVALID_PARAMETER;
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request and return */
+ FatCompleteRequest(IrpContext, Irp, Status);
+ return Status;
+ }
+
+ /* It is indeed a volume open request */
+ Iosb = FatiOpenVolume(IrpContext,
+ FileObject,
+ Vcb,
+ DesiredAccess,
+ ShareAccess,
+ CreateDisposition);
+
+ /* Set resulting information */
+ Irp->IoStatus.Information = Iosb.Information;
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request and return */
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+ return Iosb.Status;
+ }
+ }
+
+ /* Check if this is a relative open */
+ if (RelatedFO)
+ {
+ /* Decode the file object */
+ TypeOfOpen = FatDecodeFileObject(RelatedFO,
+ &RelatedVcb,
+ &RelatedDcb,
+ &RelatedCcb);
+
+ /* Check open type */
+ if (TypeOfOpen != UserFileOpen &&
+ TypeOfOpen != UserDirectoryOpen)
+ {
+ DPRINT1("Invalid file object!\n");
+
+ Status = STATUS_OBJECT_PATH_NOT_FOUND;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ FatCompleteRequest(IrpContext, Irp, Status);
+ return Status;
+ }
+
+ /* File path must be relative */
+ if (FileName.Length != 0 &&
+ FileName.Buffer[0] == L'\\')
+ {
+ Status = STATUS_OBJECT_NAME_INVALID;
+
+ /* The name is absolute, fail */
+ FatReleaseVcb(IrpContext, Vcb);
+ FatCompleteRequest(IrpContext, Irp, Status);
+ return Status;
+ }
+
+ /* Make sure volume is the same */
+ ASSERT(RelatedVcb == Vcb);
+
+ /* Save VPB */
+ FileObject->Vpb = RelatedFO->Vpb;
+
+ /* Set parent DCB */
+ ParentDcb = RelatedDcb;
+
+ DPRINT("Opening file '%wZ' relatively to '%wZ'\n", &FileName, &ParentDcb->FullFileName);
+ }
+ 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");
+ Status = STATUS_FILE_IS_A_DIRECTORY;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ FatCompleteRequest(IrpContext, Irp, Status);
+ return Status;
+ }
+
+ /* Check for target directory on a root dir */
+ if (OpenTargetDirectory)
+ {
+ Status = STATUS_INVALID_PARAMETER;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ FatCompleteRequest(IrpContext, Irp, Status);
+ return Status;
+ }
+
+ /* Check delete on close on a root dir */
+ if (DeleteOnClose)
+ {
+ Status = STATUS_CANNOT_DELETE;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ FatCompleteRequest(IrpContext, Irp, Status);
+ return Status;
+ }
+
+ /* Call root directory open routine */
+ Iosb = FatiOpenRootDcb(IrpContext,
+ FileObject,
+ Vcb,
+ DesiredAccess,
+ ShareAccess,
+ CreateDisposition);
+
+ Irp->IoStatus.Information = Iosb.Information;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+ return Iosb.Status;
+ }
+ else
+ {
+ /* Not a root dir */
+ ParentDcb = Vcb->RootDcb;
+ DPRINT("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)
+ {
+ /* Set it if it's missing */
+ FatSetFullFileNameInFcb(IrpContext, ParentDcb);
+ }
+
+ /* 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);
+ }
+
+ /* If nothing found - try with unicode */
+ if (!NextFcb && Fcb->Dcb.SplayLinksUnicode)
+ {
+ FileNameUpcased.Buffer = FsRtlAllocatePool(PagedPool, FirstName.Length);
+ FileNameUpcased.Length = 0;
+ FileNameUpcased.MaximumLength = FirstName.Length;
+
+ /* Downcase and then upcase to normalize it */
+ Status = RtlDowncaseUnicodeString(&FileNameUpcased, &FirstName, FALSE);
+ Status = RtlUpcaseUnicodeString(&FileNameUpcased, &FileNameUpcased, FALSE);
+
+ /* Try to find FCB again using unicode name */
+ NextFcb = FatFindFcb(IrpContext,
+ &Fcb->Dcb.SplayLinksUnicode,
+ (PSTRING)&FileNameUpcased,
+ &OpenedAsDos);
+ }
+
+ /* 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);
+ }
+ }
+
+ /* Treat page file in a special way */
+ if (IsPagingFile)
+ {
+ UNIMPLEMENTED;
+ // FIXME: System file too
+ }
+
+ /* Make sure there is no pending delete on a higher-level FCB */
+ if (Fcb->State & FCB_STATE_DELETE_ON_CLOSE)
+ {
+ Iosb.Status = STATUS_DELETE_PENDING;
+
+ /* Cleanup and return */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+
+ return Iosb.Status;
+ }
+
+ /* We have a valid FCB now */
+ if (!RemainingPart.Length)
+ {
+ /* Check for target dir open */
+ if (OpenTargetDirectory)
+ {
+ DPRINT1("Opening target dir is missing\n");
+ ASSERT(FALSE);
+ }
+
+ /* Check this FCB's type */
+ if (FatNodeType(Fcb) == FAT_NTC_ROOT_DCB ||
+ FatNodeType(Fcb) == FAT_NTC_DCB)
+ {
+ /* Open a directory */
+ if (NonDirectoryFile)
+ {
+ /* Forbidden */
+ Iosb.Status = STATUS_FILE_IS_A_DIRECTORY;
+ ASSERT(FALSE);
+ return Iosb.Status;
+ }
+
+ /* Open existing DCB */
+ Iosb = FatiOpenExistingDcb(IrpContext,
+ FileObject,
+ Vcb,
+ Fcb,
+ DesiredAccess,
+ ShareAccess,
+ CreateDisposition,
+ NoEaKnowledge,
+ DeleteOnClose);
+
+ /* Save information */
+ Irp->IoStatus.Information = Iosb.Information;
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+
+ return Iosb.Status;
+ }
+ else if (FatNodeType(Fcb) == FAT_NTC_FCB)
+ {
+ /* Open a file */
+ if (OpenDirectory)
+ {
+ /* Forbidden */
+ Iosb.Status = STATUS_NOT_A_DIRECTORY;
+ ASSERT(FALSE);
+ return Iosb.Status;
+ }
+
+ /* Check for trailing backslash */
+ if (EndBackslash)
+ {
+ /* Forbidden */
+ Iosb.Status = STATUS_OBJECT_NAME_INVALID;
+ ASSERT(FALSE);
+ return Iosb.Status;
+ }
+
+ Iosb = FatiOpenExistingFcb(IrpContext,
+ FileObject,
+ Vcb,
+ Fcb,
+ DesiredAccess,
+ ShareAccess,
+ AllocationSize,
+ EaBuffer,
+ EaLength,
+ FileAttributes,
+ CreateDisposition,
+ NoEaKnowledge,
+ DeleteOnClose,
+ OpenedAsDos,
+ &OplockPostIrp);
+
+ /* Check if it's pending */
+ if (Iosb.Status != STATUS_PENDING)
+ {
+ /* In case of success set cache supported flag */
+ if (NT_SUCCESS(Iosb.Status) && !NoIntermediateBuffering)
+ {
+ SetFlag(FileObject->Flags, FO_CACHE_SUPPORTED);
+ }
+
+ /* Save information */
+ Irp->IoStatus.Information = Iosb.Information;
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+
+ return Iosb.Status;
+ }
+ else
+ {
+ /* Queue this IRP */
+ UNIMPLEMENTED;
+ ASSERT(FALSE);
+ }
+ }
+ else
+ {
+ /* Unexpected FCB type */
+ KeBugCheckEx(FAT_FILE_SYSTEM, __LINE__, (ULONG_PTR)Fcb, 0, 0);
+ }
+ }
+
+ /* 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)
+ {
+ if (FirstRun)
+ {
+ RemainingPart = NextName;
+ if (AnsiFirstName.Length)
+ Status = STATUS_SUCCESS;
+ else
+ Status = STATUS_UNMAPPABLE_CHARACTER;
+ }
+ else
+ {
+ 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);
+ }
+
+ DPRINT("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,
+ NULL);
+
+ /* Set its name */
+ FatSetFullNameInFcb(ParentDcb, &FirstName);
+ }
+
+ /* Try to open it and get a result, saying if this is a dir or a file */
+ FfError = FatiTryToOpen(FileObject, Vcb);
+
+ /* Check if we need to open target directory */
+ if (OpenTargetDirectory)
+ {
+ // TODO: Open target directory
+ UNIMPLEMENTED;
+ }
+
+ /* Check, if path is a directory or a file */
+ if (FfError == FF_ERR_FILE_OBJECT_IS_A_DIR ||
+ FfError == FF_ERR_NONE)
+ {
+ if (FfError == FF_ERR_FILE_OBJECT_IS_A_DIR)
+ {
+ if (NonDirectoryFile)
+ {
+ DPRINT1("Can't open dir as a file\n");
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ Iosb.Status = STATUS_FILE_IS_A_DIRECTORY;
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+ return Iosb.Status;
+ }
+
+ /* Open this directory */
+ Iosb = FatiOpenExistingDir(IrpContext,
+ FileObject,
+ Vcb,
+ ParentDcb,
+ DesiredAccess,
+ ShareAccess,
+ AllocationSize,
+ EaBuffer,
+ EaLength,
+ FileAttributes,
+ CreateDisposition,
+ DeleteOnClose);
+
+ Irp->IoStatus.Information = Iosb.Information;
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+
+ return Iosb.Status;
+ }
+ else
+ {
+ /* This is opening an existing file */
+ if (OpenDirectory)
+ {
+ /* But caller wanted a dir */
+ Status = STATUS_NOT_A_DIRECTORY;
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ FatCompleteRequest(IrpContext, Irp, Status);
+
+ return Status;
+ }
+
+ /* 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);
+
+ /* In case of success set cache supported flag */
+ if (NT_SUCCESS(Iosb.Status) && !NoIntermediateBuffering)
+ {
+ SetFlag(FileObject->Flags, FO_CACHE_SUPPORTED);
+ }
+
+ Irp->IoStatus.Information = Iosb.Information;
+
+ /* Unlock VCB */
+ FatReleaseVcb(IrpContext, Vcb);
+
+ /* Complete the request */
+ FatCompleteRequest(IrpContext, Irp, Iosb.Status);
+
+ return Iosb.Status;
+ }
+ }
+
+ /* We come here only in the case when a new file is created */
+ ASSERT(FALSE);
+}
+
NTSTATUS
NTAPI
FatCreate(PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
- DPRINT1("FatCreate()\n");
- return STATUS_NOT_IMPLEMENTED;
+ PFAT_IRP_CONTEXT IrpContext;
+ NTSTATUS Status;
+
+ /* 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