5431 lines
156 KiB
C
5431 lines
156 KiB
C
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/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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Create.c
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Abstract:
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This module implements the File Create routine for Fat called by the
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dispatch driver.
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Author:
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Gary Kimura [GaryKi] 28-Dec-1989
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Revision History:
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--*/
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#include "FatProcs.h"
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//
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// The Bug check file id for this module
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//
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#define BugCheckFileId (FAT_BUG_CHECK_CREATE)
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//
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// The debug trace level
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//
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#define Dbg (DEBUG_TRACE_CREATE)
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//
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// Macros for incrementing performance counters.
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//
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#define CollectCreateHitStatistics(VCB) { \
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PFILESYSTEM_STATISTICS Stats = &(VCB)->Statistics[KeGetCurrentProcessorNumber()]; \
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Stats->Fat.CreateHits += 1; \
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}
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#define CollectCreateStatistics(VCB,STATUS) { \
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PFILESYSTEM_STATISTICS Stats = &(VCB)->Statistics[KeGetCurrentProcessorNumber()]; \
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if ((STATUS) == STATUS_SUCCESS) { \
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Stats->Fat.SuccessfulCreates += 1; \
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} else { \
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Stats->Fat.FailedCreates += 1; \
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} \
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}
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LUID FatSecurityPrivilege = { SE_SECURITY_PRIVILEGE, 0 };
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//
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// local procedure prototypes
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//
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IO_STATUS_BLOCK
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FatOpenVolume (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG CreateDisposition
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);
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IO_STATUS_BLOCK
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FatOpenRootDcb (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG CreateDisposition
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);
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IO_STATUS_BLOCK
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FatOpenExistingDcb (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN PDCB Dcb,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG CreateDisposition,
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IN BOOLEAN NoEaKnowledge,
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IN BOOLEAN DeleteOnClose
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);
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IO_STATUS_BLOCK
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FatOpenExistingFcb (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN PFCB Fcb,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG AllocationSize,
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IN PFILE_FULL_EA_INFORMATION EaBuffer,
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IN ULONG EaLength,
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IN UCHAR FileAttributes,
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IN ULONG CreateDisposition,
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IN BOOLEAN DeleteOnClose,
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IN BOOLEAN NoEaKnowledge,
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IN BOOLEAN FileNameOpenedDos,
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OUT PBOOLEAN OplockPostIrp
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);
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IO_STATUS_BLOCK
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FatOpenTargetDirectory (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PDCB Dcb,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN BOOLEAN DoesNameExist
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);
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IO_STATUS_BLOCK
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FatOpenExistingDirectory (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN PDCB ParentDcb,
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IN PDIRENT Dirent,
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IN ULONG LfnByteOffset,
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IN ULONG DirentByteOffset,
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IN PUNICODE_STRING Lfn,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG CreateDisposition,
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IN BOOLEAN NoEaKnowledge,
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IN BOOLEAN DeleteOnClose
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);
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IO_STATUS_BLOCK
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FatOpenExistingFile (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN PDCB ParentDcb,
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IN PDIRENT Dirent,
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IN ULONG LfnByteOffset,
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IN ULONG DirentByteOffset,
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IN PUNICODE_STRING Lfn,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG AllocationSize,
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IN PFILE_FULL_EA_INFORMATION EaBuffer,
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IN ULONG EaLength,
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IN UCHAR FileAttributes,
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IN ULONG CreateDisposition,
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IN BOOLEAN IsPagingFile,
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IN BOOLEAN NoEaKnowledge,
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IN BOOLEAN DeleteOnClose,
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IN BOOLEAN FileNameOpenedDos
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);
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IO_STATUS_BLOCK
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FatCreateNewDirectory (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN PDCB ParentDcb,
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IN POEM_STRING OemName,
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IN PUNICODE_STRING UnicodeName,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN PFILE_FULL_EA_INFORMATION EaBuffer,
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IN ULONG EaLength,
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IN UCHAR FileAttributes,
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IN BOOLEAN NoEaKnowledge,
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IN BOOLEAN DeleteOnClose
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);
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IO_STATUS_BLOCK
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FatCreateNewFile (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PVCB Vcb,
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IN PDCB ParentDcb,
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IN POEM_STRING OemName,
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IN PUNICODE_STRING UnicodeName,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG AllocationSize,
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IN PFILE_FULL_EA_INFORMATION EaBuffer,
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IN ULONG EaLength,
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IN UCHAR FileAttributes,
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IN PUNICODE_STRING LfnBuffer,
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IN BOOLEAN IsPagingFile,
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IN BOOLEAN NoEaKnowledge,
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IN BOOLEAN DeleteOnClose,
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IN BOOLEAN TemporaryFile
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);
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IO_STATUS_BLOCK
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FatSupersedeOrOverwriteFile (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN PFCB Fcb,
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IN ACCESS_MASK DesiredAccess,
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IN USHORT ShareAccess,
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IN ULONG AllocationSize,
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IN PFILE_FULL_EA_INFORMATION EaBuffer,
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IN ULONG EaLength,
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IN UCHAR FileAttributes,
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IN ULONG CreateDisposition,
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IN BOOLEAN NoEaKnowledge
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, FatCommonCreate)
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#pragma alloc_text(PAGE, FatCreateNewDirectory)
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#pragma alloc_text(PAGE, FatCreateNewFile)
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#pragma alloc_text(PAGE, FatFsdCreate)
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#pragma alloc_text(PAGE, FatOpenExistingDcb)
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#pragma alloc_text(PAGE, FatOpenExistingDirectory)
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#pragma alloc_text(PAGE, FatOpenExistingFcb)
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#pragma alloc_text(PAGE, FatOpenExistingFile)
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#pragma alloc_text(PAGE, FatOpenRootDcb)
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#pragma alloc_text(PAGE, FatOpenTargetDirectory)
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#pragma alloc_text(PAGE, FatOpenVolume)
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#pragma alloc_text(PAGE, FatSupersedeOrOverwriteFile)
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#pragma alloc_text(PAGE, FatSelectNames)
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#pragma alloc_text(PAGE, FatSetFullNameInFcb)
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#endif
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NTSTATUS
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FatFsdCreate (
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IN PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine implements the FSD part of the NtCreateFile and NtOpenFile
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API calls.
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Arguments:
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VolumeDeviceObject - Supplies the volume device object where the
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file/directory exists that we are trying to open/create
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Irp - Supplies the Irp being processed
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Return Value:
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NTSTATUS - The Fsd status for the Irp
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--*/
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{
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NTSTATUS Status;
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PIRP_CONTEXT IrpContext = NULL;
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BOOLEAN TopLevel;
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//
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// If we were called with our file system device object instead of a
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// volume device object, just complete this request with STATUS_SUCCESS
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//
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if (VolumeDeviceObject->DeviceObject.Size == (USHORT)sizeof(DEVICE_OBJECT)) {
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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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TimerStart(Dbg);
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DebugTrace(+1, Dbg, "FatFsdCreate\n", 0);
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//
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// Call the common create routine, with block allowed if the operation
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// is synchronous.
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//
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FsRtlEnterFileSystem();
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TopLevel = FatIsIrpTopLevel( Irp );
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try {
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IrpContext = FatCreateIrpContext( Irp, TRUE );
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Status = FatCommonCreate( IrpContext, Irp );
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} except(FatExceptionFilter( IrpContext, GetExceptionInformation() )) {
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|
|
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//
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// We had some trouble trying to perform the requested
|
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// operation, so we'll abort the I/O request with
|
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// the error status that we get back from the
|
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// execption code
|
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//
|
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|
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Status = FatProcessException( IrpContext, Irp, GetExceptionCode() );
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}
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if (TopLevel) { IoSetTopLevelIrp( NULL ); }
|
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|
|
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FsRtlExitFileSystem();
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|
|
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//
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// And return to our caller
|
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//
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|
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DebugTrace(-1, Dbg, "FatFsdCreate -> %08lx\n", Status );
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TimerStop(Dbg,"FatFsdCreate");
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UNREFERENCED_PARAMETER( VolumeDeviceObject );
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return Status;
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}
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|
|
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|
|
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|
NTSTATUS
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|
FatCommonCreate (
|
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|
IN PIRP_CONTEXT IrpContext,
|
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|
IN PIRP Irp
|
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|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This is the common routine for creating/opening a file called by
|
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|
both the fsd and fsp threads.
|
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|
|
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|
Arguments:
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|
|
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|
Irp - Supplies the Irp to process
|
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|
|
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|
Return Value:
|
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|
|
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|
NTSTATUS - the return status for the operation
|
|||
|
|
|||
|
--*/
|
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|
|
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|
{
|
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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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|
|
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|
PFILE_OBJECT FileObject;
|
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|
PFILE_OBJECT RelatedFileObject;
|
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|
UNICODE_STRING FileName;
|
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|
ULONG AllocationSize;
|
|||
|
PFILE_FULL_EA_INFORMATION EaBuffer;
|
|||
|
ACCESS_MASK DesiredAccess;
|
|||
|
ULONG Options;
|
|||
|
UCHAR FileAttributes;
|
|||
|
USHORT ShareAccess;
|
|||
|
ULONG EaLength;
|
|||
|
|
|||
|
BOOLEAN CreateDirectory;
|
|||
|
BOOLEAN SequentialOnly;
|
|||
|
BOOLEAN NoIntermediateBuffering;
|
|||
|
BOOLEAN OpenDirectory;
|
|||
|
BOOLEAN IsPagingFile;
|
|||
|
BOOLEAN OpenTargetDirectory;
|
|||
|
BOOLEAN DirectoryFile;
|
|||
|
BOOLEAN NonDirectoryFile;
|
|||
|
BOOLEAN NoEaKnowledge;
|
|||
|
BOOLEAN DeleteOnClose;
|
|||
|
BOOLEAN TemporaryFile;
|
|||
|
BOOLEAN FileNameOpenedDos;
|
|||
|
|
|||
|
ULONG CreateDisposition;
|
|||
|
|
|||
|
PVCB Vcb;
|
|||
|
PFCB Fcb;
|
|||
|
PCCB Ccb;
|
|||
|
PDCB ParentDcb;
|
|||
|
PDCB FinalDcb = NULL;
|
|||
|
|
|||
|
UNICODE_STRING FinalName;
|
|||
|
UNICODE_STRING RemainingPart;
|
|||
|
UNICODE_STRING NextRemainingPart;
|
|||
|
UNICODE_STRING UpcasedFinalName;
|
|||
|
WCHAR UpcasedBuffer[MAX_LFN_CHARACTERS];
|
|||
|
|
|||
|
OEM_STRING OemFinalName;
|
|||
|
UCHAR OemBuffer[MAX_LFN_CHARACTERS*2];
|
|||
|
|
|||
|
PDIRENT Dirent;
|
|||
|
PBCB DirentBcb;
|
|||
|
ULONG LfnByteOffset;
|
|||
|
ULONG DirentByteOffset;
|
|||
|
|
|||
|
BOOLEAN PostIrp = FALSE;
|
|||
|
BOOLEAN OplockPostIrp = FALSE;
|
|||
|
BOOLEAN TrailingBackslash;
|
|||
|
BOOLEAN FirstLoop = TRUE;
|
|||
|
|
|||
|
CCB LocalCcb;
|
|||
|
UNICODE_STRING Lfn;
|
|||
|
WCHAR LfnBuffer[MAX_LFN_CHARACTERS];
|
|||
|
|
|||
|
//
|
|||
|
// Get the current IRP stack location
|
|||
|
//
|
|||
|
|
|||
|
IrpSp = IoGetCurrentIrpStackLocation( Irp );
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatCommonCreate\n", 0 );
|
|||
|
DebugTrace( 0, Dbg, "Irp = %08lx\n", Irp );
|
|||
|
DebugTrace( 0, Dbg, "->Flags = %08lx\n", Irp->Flags );
|
|||
|
DebugTrace( 0, Dbg, "->FileObject = %08lx\n", IrpSp->FileObject );
|
|||
|
DebugTrace( 0, Dbg, " ->RelatedFileObject = %08lx\n", IrpSp->FileObject->RelatedFileObject );
|
|||
|
DebugTrace( 0, Dbg, " ->FileName = %Z\n", &IrpSp->FileObject->FileName );
|
|||
|
DebugTrace( 0, Dbg, "->AllocationSize.LowPart = %08lx\n", Irp->Overlay.AllocationSize.LowPart );
|
|||
|
DebugTrace( 0, Dbg, "->AllocationSize.HighPart = %08lx\n", Irp->Overlay.AllocationSize.HighPart );
|
|||
|
DebugTrace( 0, Dbg, "->SystemBuffer = %08lx\n", Irp->AssociatedIrp.SystemBuffer );
|
|||
|
DebugTrace( 0, Dbg, "->DesiredAccess = %08lx\n", IrpSp->Parameters.Create.SecurityContext->DesiredAccess );
|
|||
|
DebugTrace( 0, Dbg, "->Options = %08lx\n", IrpSp->Parameters.Create.Options );
|
|||
|
DebugTrace( 0, Dbg, "->FileAttributes = %04x\n", IrpSp->Parameters.Create.FileAttributes );
|
|||
|
DebugTrace( 0, Dbg, "->ShareAccess = %04x\n", IrpSp->Parameters.Create.ShareAccess );
|
|||
|
DebugTrace( 0, Dbg, "->EaLength = %08lx\n", IrpSp->Parameters.Create.EaLength );
|
|||
|
|
|||
|
//
|
|||
|
// Here is the "M A R K L U C O V S K Y" hack from hell.
|
|||
|
//
|
|||
|
// It's here because Mark says he can't avoid sending me double beginning
|
|||
|
// backslashes via the Win32 layer.
|
|||
|
//
|
|||
|
|
|||
|
if ((IrpSp->FileObject->FileName.Length > sizeof(WCHAR)) &&
|
|||
|
(IrpSp->FileObject->FileName.Buffer[1] == L'\\') &&
|
|||
|
(IrpSp->FileObject->FileName.Buffer[0] == L'\\')) {
|
|||
|
|
|||
|
IrpSp->FileObject->FileName.Length -= sizeof(WCHAR);
|
|||
|
|
|||
|
RtlMoveMemory( &IrpSp->FileObject->FileName.Buffer[0],
|
|||
|
&IrpSp->FileObject->FileName.Buffer[1],
|
|||
|
IrpSp->FileObject->FileName.Length );
|
|||
|
|
|||
|
//
|
|||
|
// If there are still two beginning backslashes, the name is bogus.
|
|||
|
//
|
|||
|
|
|||
|
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 );
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCommonCreate -> STATUS_OBJECT_NAME_INVALID\n", 0);
|
|||
|
return STATUS_OBJECT_NAME_INVALID;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Make sure the input large integer is valid
|
|||
|
//
|
|||
|
|
|||
|
if (Irp->Overlay.AllocationSize.HighPart != 0) {
|
|||
|
|
|||
|
FatCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCommonCreate -> STATUS_INVALID_PARAMETER\n", 0);
|
|||
|
return STATUS_INVALID_PARAMETER;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Reference our input parameters to make things easier
|
|||
|
//
|
|||
|
|
|||
|
FileObject = IrpSp->FileObject;
|
|||
|
FileName = FileObject->FileName;
|
|||
|
RelatedFileObject = 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 up the file object's Vpb pointer in case anything happens.
|
|||
|
// This will allow us to get a reasonable pop-up.
|
|||
|
//
|
|||
|
|
|||
|
if ( RelatedFileObject != NULL ) {
|
|||
|
FileObject->Vpb = RelatedFileObject->Vpb;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If we have Write Through set in the FileObject, then set the FileObject
|
|||
|
// flag as well, so that the fast write path call to FsRtlCopyWrite
|
|||
|
// knows it is Write Through.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WRITE_THROUGH)) {
|
|||
|
FileObject->Flags |= FO_WRITE_THROUGH;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Force setting the archive bit in the attributes byte to follow OS/2,
|
|||
|
// & DOS semantics. Also mask out any extraneous bits, note that
|
|||
|
// we can't use the ATTRIBUTE_VALID_FLAGS constant because that has
|
|||
|
// the control and normal flags set.
|
|||
|
//
|
|||
|
// Delay setting ARCHIVE in case this is a directory: DavidGoe 2/16/95
|
|||
|
//
|
|||
|
|
|||
|
FileAttributes &= (FILE_ATTRIBUTE_READONLY |
|
|||
|
FILE_ATTRIBUTE_HIDDEN |
|
|||
|
FILE_ATTRIBUTE_SYSTEM |
|
|||
|
FILE_ATTRIBUTE_ARCHIVE );
|
|||
|
|
|||
|
//
|
|||
|
// Locate the volume device object and Vcb that we are trying to access
|
|||
|
//
|
|||
|
|
|||
|
Vcb = &((PVOLUME_DEVICE_OBJECT)IrpSp->DeviceObject)->Vcb;
|
|||
|
|
|||
|
//
|
|||
|
// If this is a double space volume, turn off the FILE_WRITE_DATA bit
|
|||
|
// if set.
|
|||
|
//
|
|||
|
|
|||
|
#if defined(WE_WON_ON_APPEAL) && !defined(DOUBLE_SPACE_WRITE)
|
|||
|
|
|||
|
if ((Vcb->Dscb != NULL) &&
|
|||
|
FlagOn(DesiredAccess, FILE_ADD_FILE |
|
|||
|
FILE_ADD_SUBDIRECTORY |
|
|||
|
FILE_DELETE_CHILD |
|
|||
|
FILE_WRITE_DATA |
|
|||
|
FILE_APPEND_DATA |
|
|||
|
FILE_WRITE_EA |
|
|||
|
FILE_WRITE_ATTRIBUTES |
|
|||
|
DELETE )) {
|
|||
|
|
|||
|
FatCompleteRequest( IrpContext, Irp, STATUS_ACCESS_DENIED );
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCommonCreate -> STATUS_ACCESS_DENIED\n", 0);
|
|||
|
return STATUS_ACCESS_DENIED;
|
|||
|
}
|
|||
|
|
|||
|
#endif
|
|||
|
|
|||
|
//
|
|||
|
// Verify that this isn't an open for a structured storage type.
|
|||
|
//
|
|||
|
|
|||
|
if ((Options & FILE_STORAGE_TYPE_SPECIFIED) == FILE_STORAGE_TYPE_SPECIFIED) {
|
|||
|
ClearFlag(Options, FILE_STORAGE_TYPE_SPECIFIED);
|
|||
|
|
|||
|
if ((Options & FILE_STORAGE_TYPE_FILE) == FILE_STORAGE_TYPE_FILE) {
|
|||
|
|
|||
|
//
|
|||
|
// Treated as FILE_NON_DIRECTORY_FILE.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag(Options, FILE_STORAGE_TYPE_FILE);
|
|||
|
SetFlag(Options, FILE_NON_DIRECTORY_FILE);
|
|||
|
|
|||
|
} else if ((Options & FILE_STORAGE_TYPE_DIRECTORY) == FILE_STORAGE_TYPE_DIRECTORY) {
|
|||
|
|
|||
|
//
|
|||
|
// Treated as FILE_DIRECTORY_FILE.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag(Options, FILE_STORAGE_TYPE_DIRECTORY);
|
|||
|
SetFlag(Options, FILE_DIRECTORY_FILE);
|
|||
|
|
|||
|
} else if ((Options & FILE_STORAGE_TYPE_DEFAULT) == FILE_STORAGE_TYPE_DEFAULT) {
|
|||
|
|
|||
|
//
|
|||
|
// Treated as neither FILE nor NON_DIRECTORY_FILE.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag(Options, FILE_STORAGE_TYPE_DEFAULT);
|
|||
|
}
|
|||
|
|
|||
|
if ((Options & FILE_STORAGE_TYPE_MASK) != 0) {
|
|||
|
|
|||
|
FatCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCommonCreate -> STATUS_INVALID_PARAMETER\n", 0);
|
|||
|
return STATUS_INVALID_PARAMETER;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Decipher Option flags and values
|
|||
|
//
|
|||
|
|
|||
|
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 );
|
|||
|
|
|||
|
CreateDisposition = (Options >> 24) & 0x000000ff;
|
|||
|
|
|||
|
IsPagingFile = BooleanFlagOn( IrpSp->Flags, SL_OPEN_PAGING_FILE );
|
|||
|
OpenTargetDirectory = BooleanFlagOn( IrpSp->Flags, SL_OPEN_TARGET_DIRECTORY );
|
|||
|
|
|||
|
CreateDirectory = (BOOLEAN)(DirectoryFile &&
|
|||
|
((CreateDisposition == FILE_CREATE) ||
|
|||
|
(CreateDisposition == FILE_OPEN_IF)));
|
|||
|
|
|||
|
OpenDirectory = (BOOLEAN)(DirectoryFile &&
|
|||
|
((CreateDisposition == FILE_OPEN) ||
|
|||
|
(CreateDisposition == FILE_OPEN_IF)));
|
|||
|
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Acquire exclusive access to the vcb, and enqueue the Irp if
|
|||
|
// we didn't get it.
|
|||
|
//
|
|||
|
|
|||
|
if (!FatAcquireExclusiveVcb( IrpContext, Vcb )) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot acquire Vcb\n", 0);
|
|||
|
|
|||
|
Iosb.Status = FatFsdPostRequest( IrpContext, Irp );
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCommonCreate -> %08lx\n", Iosb.Status );
|
|||
|
return Iosb.Status;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Initialize the DirentBcb to null
|
|||
|
//
|
|||
|
|
|||
|
DirentBcb = NULL;
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// Make sure the vcb is in a usable condition. This will raise
|
|||
|
// and error condition if the volume is unusable
|
|||
|
//
|
|||
|
|
|||
|
FatVerifyVcb( IrpContext, Vcb );
|
|||
|
|
|||
|
//
|
|||
|
// If the Vcb is locked then we cannot open another file
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_LOCKED)) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Volume is locked\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check if we are opening the volume and not a file/directory.
|
|||
|
// We are opening the volume if the name is empty and there
|
|||
|
// isn't a related file object. If there is a related file object
|
|||
|
// then it is the Vcb itself.
|
|||
|
//
|
|||
|
|
|||
|
if ((FileName.Length == 0) &&
|
|||
|
((RelatedFileObject == NULL) ||
|
|||
|
(FatDecodeFileObject(RelatedFileObject,&Vcb,&Fcb,&Ccb)) == UserVolumeOpen)) {
|
|||
|
|
|||
|
//
|
|||
|
// Check if we were to open a directory
|
|||
|
//
|
|||
|
|
|||
|
if (DirectoryFile) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot open volume as a directory\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_NOT_A_DIRECTORY );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Can't open the TargetDirectory of the DASD volume.
|
|||
|
//
|
|||
|
|
|||
|
if (OpenTargetDirectory) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_INVALID_PARAMETER );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Opening the volume, Vcb = %08lx\n", Vcb);
|
|||
|
|
|||
|
CollectCreateHitStatistics(Vcb);
|
|||
|
|
|||
|
Iosb = FatOpenVolume( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
CreateDisposition );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check if we're opening the root dcb
|
|||
|
//
|
|||
|
|
|||
|
if ((FileName.Length == sizeof(WCHAR)) &&
|
|||
|
(FileName.Buffer[0] == L'\\')) {
|
|||
|
|
|||
|
//
|
|||
|
// Check if we were not suppose to open a directory
|
|||
|
//
|
|||
|
|
|||
|
if (NonDirectoryFile) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot open root directory as a file\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_FILE_IS_A_DIRECTORY );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Can't open the TargetDirectory of the root directory.
|
|||
|
//
|
|||
|
|
|||
|
if (OpenTargetDirectory) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_INVALID_PARAMETER );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Not allowed to delete root directory.
|
|||
|
//
|
|||
|
|
|||
|
if (DeleteOnClose) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_CANNOT_DELETE );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Opening root dcb\n", 0);
|
|||
|
|
|||
|
CollectCreateHitStatistics(Vcb);
|
|||
|
|
|||
|
Iosb = FatOpenRootDcb( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
CreateDisposition );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// FatCommonCreate(): trailing backslash check
|
|||
|
//
|
|||
|
|
|||
|
|
|||
|
if ((FileName.Length != 0) &&
|
|||
|
(FileName.Buffer[FileName.Length/sizeof(WCHAR)-1] == L'\\')) {
|
|||
|
|
|||
|
FileName.Length -= sizeof(WCHAR);
|
|||
|
TrailingBackslash = TRUE;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
TrailingBackslash = FALSE;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If there is a related file object then this is a relative open.
|
|||
|
// The related file object is the directory to start our search at.
|
|||
|
// Return an error if it is not a directory.
|
|||
|
//
|
|||
|
|
|||
|
if (RelatedFileObject != NULL) {
|
|||
|
|
|||
|
PVCB RelatedVcb;
|
|||
|
PDCB RelatedDcb;
|
|||
|
PCCB RelatedCcb;
|
|||
|
TYPE_OF_OPEN TypeOfOpen;
|
|||
|
|
|||
|
TypeOfOpen = FatDecodeFileObject( RelatedFileObject,
|
|||
|
&RelatedVcb,
|
|||
|
&RelatedDcb,
|
|||
|
&RelatedCcb );
|
|||
|
|
|||
|
if (TypeOfOpen != UserFileOpen &&
|
|||
|
TypeOfOpen != UserDirectoryOpen) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Invalid related file object\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check a special error case.
|
|||
|
//
|
|||
|
|
|||
|
if ((FileName.Length == sizeof(WCHAR)) &&
|
|||
|
(FileName.Buffer[0] == L'\\')) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Set up the file object's Vpb pointer in case anything happens.
|
|||
|
//
|
|||
|
|
|||
|
FileObject->Vpb = RelatedFileObject->Vpb;
|
|||
|
|
|||
|
ParentDcb = RelatedDcb;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
ParentDcb = Vcb->RootDcb;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Initialize our two temp strings with their stack buffers.
|
|||
|
//
|
|||
|
|
|||
|
OemFinalName.Length = 0;
|
|||
|
OemFinalName.MaximumLength = MAX_LFN_CHARACTERS * 2;
|
|||
|
OemFinalName.Buffer = OemBuffer;
|
|||
|
|
|||
|
UpcasedFinalName.Length = 0;
|
|||
|
UpcasedFinalName.MaximumLength = MAX_LFN_CHARACTERS * sizeof(WCHAR);
|
|||
|
UpcasedFinalName.Buffer = UpcasedBuffer;
|
|||
|
|
|||
|
//
|
|||
|
// We loop here until we land on an Fcb that is in a good
|
|||
|
// condition. This way we can reopen files that have stale handles
|
|||
|
// to files of the same name but are now different.
|
|||
|
//
|
|||
|
|
|||
|
while ( TRUE ) {
|
|||
|
|
|||
|
Fcb = ParentDcb;
|
|||
|
RemainingPart = FileName;
|
|||
|
|
|||
|
//
|
|||
|
// Now walk down the Dcb tree looking for the longest prefix.
|
|||
|
// This one exit condition in the while() is to handle a
|
|||
|
// special case condition (relative NULL name open), the main
|
|||
|
// exit conditions are at the bottom of the loop.
|
|||
|
//
|
|||
|
|
|||
|
while (RemainingPart.Length != 0) {
|
|||
|
|
|||
|
PFCB NextFcb;
|
|||
|
|
|||
|
FsRtlDissectName( RemainingPart,
|
|||
|
&FinalName,
|
|||
|
&NextRemainingPart );
|
|||
|
|
|||
|
//
|
|||
|
// If RemainingPart starts with a backslash the name is
|
|||
|
// invalid.
|
|||
|
// Check for no more than 255 characters in FinalName
|
|||
|
//
|
|||
|
|
|||
|
if (((NextRemainingPart.Length != 0) && (NextRemainingPart.Buffer[0] == L'\\')) ||
|
|||
|
(FinalName.Length > 255*sizeof(WCHAR))) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now, try to convert this one component into Oem and search
|
|||
|
// the splay tree. If it works then that's great, otherwise
|
|||
|
// we have to try with the UNICODE name instead.
|
|||
|
//
|
|||
|
|
|||
|
Status = FatUpcaseUnicodeStringToCountedOemString( &OemFinalName, &FinalName, FALSE );
|
|||
|
|
|||
|
if (NT_SUCCESS(Status)) {
|
|||
|
|
|||
|
NextFcb = FatFindFcb( IrpContext,
|
|||
|
&Fcb->Specific.Dcb.RootOemNode,
|
|||
|
(PSTRING)&OemFinalName,
|
|||
|
&FileNameOpenedDos );
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
NextFcb = NULL;
|
|||
|
OemFinalName.Length = 0;
|
|||
|
|
|||
|
if (Status != STATUS_UNMAPPABLE_CHARACTER) {
|
|||
|
|
|||
|
try_return( Iosb.Status = Status );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If we didn't find anything searching the Oem space, we
|
|||
|
// have to try the Unicode space. To save cycles in the
|
|||
|
// common case that this tree is empty, we do a quick check
|
|||
|
// here.
|
|||
|
//
|
|||
|
|
|||
|
if ((NextFcb == NULL) && Fcb->Specific.Dcb.RootUnicodeNode) {
|
|||
|
|
|||
|
//
|
|||
|
// First downcase, then upcase the string, because this
|
|||
|
// is what happens when putting names into the tree (see
|
|||
|
// strucsup.c, FatConstructNamesInFcb()).
|
|||
|
//
|
|||
|
|
|||
|
Status = FatDowncaseUnicodeString(&UpcasedFinalName, &FinalName, FALSE );
|
|||
|
if (!NT_SUCCESS(Status)) {
|
|||
|
|
|||
|
try_return( Iosb.Status = Status );
|
|||
|
}
|
|||
|
|
|||
|
Status = FatUpcaseUnicodeString( &UpcasedFinalName, &UpcasedFinalName, FALSE );
|
|||
|
if (!NT_SUCCESS(Status)) {
|
|||
|
|
|||
|
try_return( Iosb.Status = Status );
|
|||
|
}
|
|||
|
|
|||
|
NextFcb = FatFindFcb( IrpContext,
|
|||
|
&Fcb->Specific.Dcb.RootUnicodeNode,
|
|||
|
(PSTRING)&UpcasedFinalName,
|
|||
|
&FileNameOpenedDos );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If we got back an Fcb then we consumed the FinalName
|
|||
|
// legitimately, so the remaining name is now RemainingPart.
|
|||
|
//
|
|||
|
|
|||
|
if (NextFcb != NULL) {
|
|||
|
Fcb = NextFcb;
|
|||
|
RemainingPart = NextRemainingPart;
|
|||
|
}
|
|||
|
|
|||
|
if ((NextFcb == NULL) ||
|
|||
|
(NodeType(NextFcb) == FAT_NTC_FCB) ||
|
|||
|
(NextRemainingPart.Length == 0)) {
|
|||
|
|
|||
|
break;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Remaining name cannot start with a backslash
|
|||
|
//
|
|||
|
|
|||
|
if (RemainingPart.Length && (RemainingPart.Buffer[0] == L'\\')) {
|
|||
|
|
|||
|
RemainingPart.Length -= sizeof(WCHAR);
|
|||
|
RemainingPart.Buffer += 1;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now verify that everybody up to the longest found prefix is valid.
|
|||
|
//
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
FatVerifyFcb( IrpContext, Fcb );
|
|||
|
|
|||
|
} except( (GetExceptionCode() == STATUS_FILE_INVALID) ?
|
|||
|
EXCEPTION_EXECUTE_HANDLER :
|
|||
|
EXCEPTION_CONTINUE_SEARCH ) {
|
|||
|
|
|||
|
NOTHING;
|
|||
|
}
|
|||
|
|
|||
|
if ( Fcb->FcbCondition == FcbGood ) {
|
|||
|
|
|||
|
//
|
|||
|
// If we are trying to open a paging file and have happened
|
|||
|
// upon the DelayedCloseFcb, make it go away, and try again.
|
|||
|
//
|
|||
|
|
|||
|
if (IsPagingFile && FirstLoop &&
|
|||
|
(NodeType(Fcb) == FAT_NTC_FCB) &&
|
|||
|
(!IsListEmpty( &FatData.AsyncCloseList ) ||
|
|||
|
!IsListEmpty( &FatData.DelayedCloseList ))) {
|
|||
|
|
|||
|
FatFspClose(Vcb);
|
|||
|
|
|||
|
FirstLoop = FALSE;
|
|||
|
|
|||
|
continue;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
FatRemoveNames( IrpContext, Fcb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If there is already an Fcb for a paging file open, we cannot
|
|||
|
// continue as it is too difficult to move a live Fcb to
|
|||
|
// non-paged pool.
|
|||
|
//
|
|||
|
|
|||
|
if (IsPagingFile && (NodeType(Fcb) == FAT_NTC_FCB)) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_SHARING_VIOLATION );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If the longest prefix is pending delete (either the file or
|
|||
|
// some higher level directory), we cannot continue.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( Fcb->FcbState, FCB_STATE_DELETE_ON_CLOSE )) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_DELETE_PENDING );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check for a system file.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( Fcb->FcbState, FCB_STATE_SYSTEM_FILE )) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now that we've found the longest matching prefix we'll
|
|||
|
// check if there isn't any remaining part because that means
|
|||
|
// we've located an existing fcb/dcb to open and we can do the open
|
|||
|
// without going to the disk
|
|||
|
//
|
|||
|
|
|||
|
if (RemainingPart.Length == 0) {
|
|||
|
|
|||
|
//
|
|||
|
// First check if the user wanted to open the target directory
|
|||
|
// and if so then call the subroutine to finish the open.
|
|||
|
//
|
|||
|
|
|||
|
if (OpenTargetDirectory) {
|
|||
|
|
|||
|
CollectCreateHitStatistics(Vcb);
|
|||
|
|
|||
|
Iosb = FatOpenTargetDirectory( IrpContext,
|
|||
|
FileObject,
|
|||
|
Fcb->ParentDcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
TRUE );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// We can open an existing fcb/dcb, now we only need to case
|
|||
|
// on which type to open.
|
|||
|
//
|
|||
|
|
|||
|
if (NodeType(Fcb) == FAT_NTC_DCB || NodeType(Fcb) == FAT_NTC_ROOT_DCB) {
|
|||
|
|
|||
|
//
|
|||
|
// This is a directory we're opening up so check if
|
|||
|
// we were not to open a directory
|
|||
|
//
|
|||
|
|
|||
|
if (NonDirectoryFile) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot open directory as a file\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_FILE_IS_A_DIRECTORY );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Open existing dcb, Dcb = %08lx\n", Fcb);
|
|||
|
|
|||
|
CollectCreateHitStatistics(Vcb);
|
|||
|
|
|||
|
Iosb = FatOpenExistingDcb( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
(PDCB)Fcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
CreateDisposition,
|
|||
|
NoEaKnowledge,
|
|||
|
DeleteOnClose );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check if we're trying to open an existing Fcb and that
|
|||
|
// the user didn't want to open a directory. Note that this
|
|||
|
// call might actually come back with status_pending because
|
|||
|
// the user wanted to supersede or overwrite the file and we
|
|||
|
// cannot block. If it is pending then we do not complete the
|
|||
|
// request, and we fall through the bottom to the code that
|
|||
|
// dispatches the request to the fsp.
|
|||
|
//
|
|||
|
|
|||
|
if (NodeType(Fcb) == FAT_NTC_FCB) {
|
|||
|
|
|||
|
//
|
|||
|
// Check if we were only to open a directory
|
|||
|
//
|
|||
|
|
|||
|
if (OpenDirectory) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot open file as directory\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_NOT_A_DIRECTORY );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Open existing fcb, Fcb = %08lx\n", Fcb);
|
|||
|
|
|||
|
if ( TrailingBackslash ) {
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
|
|||
|
CollectCreateHitStatistics(Vcb);
|
|||
|
|
|||
|
Iosb = FatOpenExistingFcb( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
Fcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
AllocationSize,
|
|||
|
EaBuffer,
|
|||
|
EaLength,
|
|||
|
FileAttributes,
|
|||
|
CreateDisposition,
|
|||
|
NoEaKnowledge,
|
|||
|
DeleteOnClose,
|
|||
|
FileNameOpenedDos,
|
|||
|
&OplockPostIrp );
|
|||
|
|
|||
|
|
|||
|
if (Iosb.Status != STATUS_PENDING) {
|
|||
|
|
|||
|
//
|
|||
|
// Check if we need to set the cache support flag in
|
|||
|
// the file object
|
|||
|
//
|
|||
|
|
|||
|
if (NT_SUCCESS( Iosb.Status) && !NoIntermediateBuffering) {
|
|||
|
|
|||
|
FileObject->Flags |= FO_CACHE_SUPPORTED;
|
|||
|
}
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Enqueue Irp to FSP\n", 0);
|
|||
|
|
|||
|
PostIrp = TRUE;
|
|||
|
}
|
|||
|
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Not and Fcb or a Dcb so we bug check
|
|||
|
//
|
|||
|
|
|||
|
FatBugCheck( NodeType(Fcb), 0, 0 );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// There is more in the name to parse than we have in existing
|
|||
|
// fcbs/dcbs. So now make sure that fcb we got for the largest
|
|||
|
// matching prefix is really a dcb otherwise we can't go any
|
|||
|
// further
|
|||
|
//
|
|||
|
|
|||
|
if ((NodeType(Fcb) != FAT_NTC_DCB) && (NodeType(Fcb) != FAT_NTC_ROOT_DCB)) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot open file as subdirectory, Fcb = %08lx\n", Fcb);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Otherwise we continue on processing the Irp and allowing ourselves
|
|||
|
// to block for I/O as necessary. Find/create additional dcb's for
|
|||
|
// the one we're trying to open. We loop until either remaining part
|
|||
|
// is empty or we get a bad filename. When we exit FinalName is
|
|||
|
// the last name in the string we're after, and ParentDcb is the
|
|||
|
// parent directory that will contain the opened/created
|
|||
|
// file/directory.
|
|||
|
//
|
|||
|
// Make sure the rest of the name is valid in at least the LFN
|
|||
|
// character set (which just happens to be that of HPFS).
|
|||
|
//
|
|||
|
// If we are not in ChicagoMode, use FAT symantics.
|
|||
|
//
|
|||
|
|
|||
|
ParentDcb = Fcb;
|
|||
|
FirstLoop = TRUE;
|
|||
|
|
|||
|
while (TRUE) {
|
|||
|
|
|||
|
//
|
|||
|
// We do one little optimization here on the first itterration of
|
|||
|
// the loop since we know that we have already tried to convert
|
|||
|
// FinalOemName from the original UNICODE.
|
|||
|
//
|
|||
|
|
|||
|
if (FirstLoop) {
|
|||
|
|
|||
|
FirstLoop = FALSE;
|
|||
|
RemainingPart = NextRemainingPart;
|
|||
|
Status = OemFinalName.Length ? STATUS_SUCCESS : STATUS_UNMAPPABLE_CHARACTER;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
//
|
|||
|
// Dissect the remaining part.
|
|||
|
//
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Dissecting the name %Z\n", &RemainingPart);
|
|||
|
|
|||
|
FsRtlDissectName( RemainingPart,
|
|||
|
&FinalName,
|
|||
|
&RemainingPart );
|
|||
|
|
|||
|
//
|
|||
|
// If RemainingPart starts with a backslash the name is
|
|||
|
// invalid.
|
|||
|
// Check for no more than 255 characters in FinalName
|
|||
|
//
|
|||
|
|
|||
|
if (((RemainingPart.Length != 0) && (RemainingPart.Buffer[0] == L'\\')) ||
|
|||
|
(FinalName.Length > 255*sizeof(WCHAR))) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now, try to convert this one component into Oem. If it works
|
|||
|
// then that's great, otherwise we have to try with the UNICODE
|
|||
|
// name instead.
|
|||
|
//
|
|||
|
|
|||
|
Status = FatUpcaseUnicodeStringToCountedOemString( &OemFinalName, &FinalName, FALSE );
|
|||
|
}
|
|||
|
|
|||
|
if (NT_SUCCESS(Status)) {
|
|||
|
|
|||
|
//
|
|||
|
// We'll start by trying to locate the dirent for the name. Note
|
|||
|
// that we already know that there isn't an Fcb/Dcb for the file
|
|||
|
// otherwise we would have found it when we did our prefix lookup.
|
|||
|
//
|
|||
|
|
|||
|
if (FatIsNameValid( IrpContext, OemFinalName, FALSE, FALSE, FALSE )) {
|
|||
|
|
|||
|
FatStringTo8dot3( IrpContext,
|
|||
|
OemFinalName,
|
|||
|
&LocalCcb.OemQueryTemplate.Constant );
|
|||
|
|
|||
|
LocalCcb.Flags = 0;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
LocalCcb.Flags = CCB_FLAG_SKIP_SHORT_NAME_COMPARE;
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
LocalCcb.Flags = CCB_FLAG_SKIP_SHORT_NAME_COMPARE;
|
|||
|
|
|||
|
if (Status != STATUS_UNMAPPABLE_CHARACTER) {
|
|||
|
|
|||
|
try_return( Iosb.Status = Status );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now we know a lot about the final name, so do legal name
|
|||
|
// checking here.
|
|||
|
//
|
|||
|
|
|||
|
if (FatData.ChicagoMode) {
|
|||
|
|
|||
|
ULONG i;
|
|||
|
|
|||
|
for (i=0; i < FinalName.Length/sizeof(WCHAR); i++) {
|
|||
|
|
|||
|
if ((FinalName.Buffer[i] < 0x80) &&
|
|||
|
!(FsRtlIsAnsiCharacterLegalHpfs(FinalName.Buffer[i], FALSE))) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
if (FlagOn(LocalCcb.Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE)) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "FinalName is %Z\n", &FinalName);
|
|||
|
DebugTrace(0, Dbg, "RemainingPart is %Z\n", &RemainingPart);
|
|||
|
|
|||
|
|
|||
|
if (!NT_SUCCESS(Status = FatUpcaseUnicodeString( &UpcasedFinalName, &FinalName, FALSE))) {
|
|||
|
|
|||
|
try_return( Iosb.Status = Status );
|
|||
|
}
|
|||
|
|
|||
|
LocalCcb.UnicodeQueryTemplate = UpcasedFinalName;
|
|||
|
LocalCcb.ContainsWildCards = FALSE;
|
|||
|
|
|||
|
Lfn.Length = 0;
|
|||
|
Lfn.MaximumLength = MAX_LFN_CHARACTERS * sizeof(WCHAR);
|
|||
|
Lfn.Buffer = LfnBuffer;
|
|||
|
|
|||
|
FatLocateDirent( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
&LocalCcb,
|
|||
|
0,
|
|||
|
&Dirent,
|
|||
|
&DirentBcb,
|
|||
|
&DirentByteOffset,
|
|||
|
&FileNameOpenedDos,
|
|||
|
&Lfn );
|
|||
|
|
|||
|
//
|
|||
|
// Remember we read this Dcb for error recovery.
|
|||
|
//
|
|||
|
|
|||
|
FinalDcb = ParentDcb;
|
|||
|
|
|||
|
//
|
|||
|
// If the remaining part is now empty then this is the last name
|
|||
|
// in the string and the one we want to open
|
|||
|
//
|
|||
|
|
|||
|
if (RemainingPart.Length == 0) { break; }
|
|||
|
|
|||
|
//
|
|||
|
// We didn't find a dirent, bail.
|
|||
|
//
|
|||
|
|
|||
|
if (Dirent == NULL) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// We now have a dirent, make sure it is a directory
|
|||
|
//
|
|||
|
|
|||
|
if (!FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Compute the LfnByteOffset.
|
|||
|
//
|
|||
|
|
|||
|
LfnByteOffset = DirentByteOffset -
|
|||
|
FAT_LFN_DIRENTS_NEEDED(&Lfn) * sizeof(LFN_DIRENT);
|
|||
|
|
|||
|
//
|
|||
|
// Create a dcb for the new directory
|
|||
|
//
|
|||
|
|
|||
|
ParentDcb = FatCreateDcb( IrpContext,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
LfnByteOffset,
|
|||
|
DirentByteOffset,
|
|||
|
Dirent,
|
|||
|
&Lfn );
|
|||
|
|
|||
|
//
|
|||
|
// Remember we created this Dcb for error recovery.
|
|||
|
//
|
|||
|
|
|||
|
FinalDcb = ParentDcb;
|
|||
|
|
|||
|
FatSetFullNameInFcb( IrpContext, ParentDcb, &FinalName );
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
}
|
|||
|
|
|||
|
if (Dirent != NULL) {
|
|||
|
|
|||
|
//
|
|||
|
// Compute the LfnByteOffset.
|
|||
|
//
|
|||
|
|
|||
|
LfnByteOffset = DirentByteOffset -
|
|||
|
FAT_LFN_DIRENTS_NEEDED(&Lfn) * sizeof(LFN_DIRENT);
|
|||
|
|
|||
|
//
|
|||
|
// First check if the user wanted to open the target directory
|
|||
|
// and if so then call the subroutine to finish the open.
|
|||
|
//
|
|||
|
|
|||
|
if (OpenTargetDirectory) {
|
|||
|
|
|||
|
Iosb = FatOpenTargetDirectory( IrpContext,
|
|||
|
FileObject,
|
|||
|
ParentDcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
TRUE );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// We were able to locate an existing dirent entry, so now
|
|||
|
// see if it is a directory that we're trying to open.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
|
|||
|
|
|||
|
//
|
|||
|
// Make sure its okay to open a directory
|
|||
|
//
|
|||
|
|
|||
|
if (NonDirectoryFile) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot open directory as a file\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_FILE_IS_A_DIRECTORY );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Open existing directory\n", 0);
|
|||
|
|
|||
|
Iosb = FatOpenExistingDirectory( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
Dirent,
|
|||
|
LfnByteOffset,
|
|||
|
DirentByteOffset,
|
|||
|
&Lfn,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
CreateDisposition,
|
|||
|
NoEaKnowledge,
|
|||
|
DeleteOnClose );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Otherwise we're trying to open and existing file, and we
|
|||
|
// need to check if the user only wanted to open a directory.
|
|||
|
//
|
|||
|
|
|||
|
if (OpenDirectory) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Cannot open file as directory\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_NOT_A_DIRECTORY );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Open existing file\n", 0);
|
|||
|
|
|||
|
if ( TrailingBackslash ) {
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
|
|||
|
Iosb = FatOpenExistingFile( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
Dirent,
|
|||
|
LfnByteOffset,
|
|||
|
DirentByteOffset,
|
|||
|
&Lfn,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
AllocationSize,
|
|||
|
EaBuffer,
|
|||
|
EaLength,
|
|||
|
FileAttributes,
|
|||
|
CreateDisposition,
|
|||
|
IsPagingFile,
|
|||
|
NoEaKnowledge,
|
|||
|
DeleteOnClose,
|
|||
|
FileNameOpenedDos );
|
|||
|
|
|||
|
//
|
|||
|
// Check if we need to set the cache support flag in
|
|||
|
// the file object
|
|||
|
//
|
|||
|
|
|||
|
if (NT_SUCCESS(Iosb.Status) && !NoIntermediateBuffering) {
|
|||
|
|
|||
|
FileObject->Flags |= FO_CACHE_SUPPORTED;
|
|||
|
}
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// We can't locate a dirent so this is a new file.
|
|||
|
// Check if the user wanted to open the target directory
|
|||
|
// and if so then call the subroutine to finish the open.
|
|||
|
//
|
|||
|
|
|||
|
if (OpenTargetDirectory) {
|
|||
|
|
|||
|
Iosb = FatOpenTargetDirectory( IrpContext,
|
|||
|
FileObject,
|
|||
|
ParentDcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FALSE );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now check to see if we wanted to only open an existing file.
|
|||
|
// And then case on whether we wanted to create a file or a directory.
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition == FILE_OPEN) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE)) {
|
|||
|
|
|||
|
DebugTrace( 0, Dbg, "Cannot open nonexisting file\n", 0);
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_NOT_FOUND );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Skip a few cycles later if we know now that the Oem name is not
|
|||
|
// valid 8.3.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(LocalCcb.Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE)) {
|
|||
|
|
|||
|
OemFinalName.Length = 0;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
if (CreateDirectory) {
|
|||
|
|
|||
|
PACCESS_STATE AccessState;
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Create new directory\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// We check if the caller wants ACCESS_SYSTEM_SECURITY access on this
|
|||
|
// directory and fail the request if he does.
|
|||
|
//
|
|||
|
|
|||
|
AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
|
|||
|
|
|||
|
//
|
|||
|
// Check if the remaining privilege includes ACCESS_SYSTEM_SECURITY.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY )) {
|
|||
|
|
|||
|
if (!SeSinglePrivilegeCheck( FatSecurityPrivilege,
|
|||
|
UserMode )) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Move this privilege from the Remaining access to Granted access.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
SetFlag( AccessState->PreviouslyGrantedAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
}
|
|||
|
|
|||
|
#if defined(WE_WON_ON_APPEAL) && !defined(DOUBLE_SPACE_WRITE)
|
|||
|
|
|||
|
//
|
|||
|
// Check for a double space volume
|
|||
|
//
|
|||
|
|
|||
|
if (Vcb->Dscb != NULL) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
|
|||
|
#endif
|
|||
|
|
|||
|
//
|
|||
|
// If this media is write protected, don't even try the create.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
|
|||
|
|
|||
|
//
|
|||
|
// Set the real device for the pop-up info, and set the verify
|
|||
|
// bit in the device object, so that we will force a verify
|
|||
|
// in case the user put the correct media back in.
|
|||
|
//
|
|||
|
|
|||
|
|
|||
|
IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
|
|||
|
Vcb->Vpb->RealDevice );
|
|||
|
|
|||
|
SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
|
|||
|
|
|||
|
FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Don't allow people to create directories with the
|
|||
|
// temporary bit set.
|
|||
|
//
|
|||
|
|
|||
|
if (TemporaryFile) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_INVALID_PARAMETER );
|
|||
|
}
|
|||
|
|
|||
|
Iosb = FatCreateNewDirectory( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
&OemFinalName,
|
|||
|
&FinalName,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
EaBuffer,
|
|||
|
EaLength,
|
|||
|
FileAttributes,
|
|||
|
NoEaKnowledge,
|
|||
|
DeleteOnClose );
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Create new file\n", 0);
|
|||
|
|
|||
|
if ( TrailingBackslash ) {
|
|||
|
try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
|
|||
|
}
|
|||
|
|
|||
|
{
|
|||
|
PACCESS_STATE AccessState;
|
|||
|
|
|||
|
//
|
|||
|
// We check if the caller wants ACCESS_SYSTEM_SECURITY access on this
|
|||
|
// directory and fail the request if he does.
|
|||
|
//
|
|||
|
|
|||
|
AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
|
|||
|
|
|||
|
//
|
|||
|
// Check if the remaining privilege includes ACCESS_SYSTEM_SECURITY.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY )) {
|
|||
|
|
|||
|
if (!SeSinglePrivilegeCheck( FatSecurityPrivilege,
|
|||
|
UserMode )) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Move this privilege from the Remaining access to Granted access.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
SetFlag( AccessState->PreviouslyGrantedAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
#if defined(WE_WON_ON_APPEAL) && !defined(DOUBLE_SPACE_WRITE)
|
|||
|
|
|||
|
//
|
|||
|
// Check for a double space volume
|
|||
|
//
|
|||
|
|
|||
|
if (Vcb->Dscb != NULL) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
|
|||
|
#endif
|
|||
|
|
|||
|
//
|
|||
|
// If this media is write protected, don't even try the create.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
|
|||
|
|
|||
|
//
|
|||
|
// Set the real device for the pop-up info, and set the verify
|
|||
|
// bit in the device object, so that we will force a verify
|
|||
|
// in case the user put the correct media back in.
|
|||
|
//
|
|||
|
|
|||
|
|
|||
|
IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
|
|||
|
Vcb->Vpb->RealDevice );
|
|||
|
|
|||
|
SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
|
|||
|
|
|||
|
FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
|
|||
|
}
|
|||
|
|
|||
|
Iosb = FatCreateNewFile( IrpContext,
|
|||
|
FileObject,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
&OemFinalName,
|
|||
|
&FinalName,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
AllocationSize,
|
|||
|
EaBuffer,
|
|||
|
EaLength,
|
|||
|
FileAttributes,
|
|||
|
&Lfn,
|
|||
|
IsPagingFile,
|
|||
|
NoEaKnowledge,
|
|||
|
DeleteOnClose,
|
|||
|
TemporaryFile );
|
|||
|
|
|||
|
//
|
|||
|
// Check if we need to set the cache support flag in
|
|||
|
// the file object
|
|||
|
//
|
|||
|
|
|||
|
if (NT_SUCCESS(Iosb.Status) && !NoIntermediateBuffering) {
|
|||
|
|
|||
|
FileObject->Flags |= FO_CACHE_SUPPORTED;
|
|||
|
}
|
|||
|
|
|||
|
Irp->IoStatus.Information = Iosb.Information;
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
|
|||
|
//
|
|||
|
// This is a Beta Fix. Do this at a better place later.
|
|||
|
//
|
|||
|
|
|||
|
if (NT_SUCCESS(Iosb.Status) && !OpenTargetDirectory) {
|
|||
|
|
|||
|
PFCB Fcb;
|
|||
|
|
|||
|
//
|
|||
|
// If there is an Fcb/Dcb, set the long file name.
|
|||
|
//
|
|||
|
|
|||
|
Fcb = FileObject->FsContext;
|
|||
|
|
|||
|
if (Fcb &&
|
|||
|
((NodeType(Fcb) == FAT_NTC_FCB) ||
|
|||
|
(NodeType(Fcb) == FAT_NTC_DCB)) &&
|
|||
|
(Fcb->FullFileName.Buffer == NULL)) {
|
|||
|
|
|||
|
FatSetFullNameInFcb( IrpContext, Fcb, &FinalName );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatCommonCreate );
|
|||
|
|
|||
|
//
|
|||
|
// We only unpin the Bcb's when we haven't already posted the
|
|||
|
// IrpContext.
|
|||
|
//
|
|||
|
|
|||
|
if (!OplockPostIrp) {
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If we are in an error path, check for any created subdir Dcbs that
|
|||
|
// have to be unwound.
|
|||
|
//
|
|||
|
|
|||
|
if ((AbnormalTermination() || !NT_SUCCESS(Iosb.Status)) &&
|
|||
|
(FinalDcb != NULL) &&
|
|||
|
IsListEmpty(&FinalDcb->Specific.Dcb.ParentDcbQueue) &&
|
|||
|
(FinalDcb->OpenCount == 0) &&
|
|||
|
(FinalDcb->Specific.Dcb.DirectoryFile != NULL)) {
|
|||
|
|
|||
|
PFILE_OBJECT DirectoryFileObject;
|
|||
|
ULONG SavedFlags;
|
|||
|
|
|||
|
//
|
|||
|
// Before doing the uninitialize, we have to unpin anything
|
|||
|
// that has been repinned, but clear writethrough first.
|
|||
|
//
|
|||
|
|
|||
|
SavedFlags = IrpContext->Flags;
|
|||
|
|
|||
|
ClearFlag( IrpContext->Flags,
|
|||
|
IRP_CONTEXT_FLAG_WRITE_THROUGH | IRP_CONTEXT_FLAG_FLOPPY );
|
|||
|
|
|||
|
FatUnpinRepinnedBcbs( IrpContext );
|
|||
|
|
|||
|
DirectoryFileObject = FinalDcb->Specific.Dcb.DirectoryFile;
|
|||
|
|
|||
|
FinalDcb->Specific.Dcb.DirectoryFile = NULL;
|
|||
|
|
|||
|
CcUninitializeCacheMap( DirectoryFileObject, NULL, NULL );
|
|||
|
|
|||
|
ObDereferenceObject( DirectoryFileObject );
|
|||
|
|
|||
|
IrpContext->Flags = SavedFlags;
|
|||
|
}
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
FatReleaseVcb( IrpContext, Vcb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// The following code is only executed if we are exiting the
|
|||
|
// procedure through a normal termination. We complete the request
|
|||
|
// and if for any reason that bombs out then we need to unreference
|
|||
|
// and possibly delete the fcb and ccb.
|
|||
|
//
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
if (PostIrp) {
|
|||
|
|
|||
|
//
|
|||
|
// If the Irp hasn't already been posted, do it now.
|
|||
|
//
|
|||
|
|
|||
|
if (!OplockPostIrp) {
|
|||
|
|
|||
|
Iosb.Status = FatFsdPostRequest( IrpContext, Irp );
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
FatUnpinRepinnedBcbs( IrpContext );
|
|||
|
}
|
|||
|
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatCommonCreate-in-FatCompleteRequest );
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
PVCB Vcb;
|
|||
|
PFCB Fcb;
|
|||
|
PCCB Ccb;
|
|||
|
|
|||
|
//
|
|||
|
// Unwind all of our counts. Note that if a write failed, then
|
|||
|
// the volume has been marked for verify, and all volume
|
|||
|
// structures will be cleaned up automatically.
|
|||
|
//
|
|||
|
|
|||
|
(VOID) FatDecodeFileObject( FileObject, &Vcb, &Fcb, &Ccb );
|
|||
|
|
|||
|
Fcb->UncleanCount -= 1;
|
|||
|
Fcb->OpenCount -= 1;
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
|
|||
|
//
|
|||
|
// If we created a new Fcb we must get rid of it at this point.
|
|||
|
//
|
|||
|
|
|||
|
if (Fcb->OpenCount == 0) {
|
|||
|
|
|||
|
if ( (NodeType( Fcb ) == FAT_NTC_DCB) &&
|
|||
|
(Fcb->Specific.Dcb.DirectoryFile != NULL) ) {
|
|||
|
|
|||
|
FatSetFileObject( Fcb->Specific.Dcb.DirectoryFile,
|
|||
|
UnopenedFileObject,
|
|||
|
NULL,
|
|||
|
NULL );
|
|||
|
|
|||
|
FatSyncUninitializeCacheMap( IrpContext,
|
|||
|
Fcb->Specific.Dcb.DirectoryFile );
|
|||
|
|
|||
|
ObDereferenceObject( Fcb->Specific.Dcb.DirectoryFile );
|
|||
|
|
|||
|
Fcb->Specific.Dcb.DirectoryFileOpenCount -= 1;
|
|||
|
Fcb->Specific.Dcb.DirectoryFile = NULL;
|
|||
|
}
|
|||
|
|
|||
|
FatDeleteFcb( IrpContext, Fcb );
|
|||
|
}
|
|||
|
|
|||
|
FatDeleteCcb( IrpContext, Ccb );
|
|||
|
|
|||
|
FatReleaseVcb( IrpContext, Vcb );
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
FatReleaseVcb( IrpContext, Vcb );
|
|||
|
|
|||
|
if ( !PostIrp ) {
|
|||
|
|
|||
|
//
|
|||
|
// If this request is successful and the file was opened
|
|||
|
// for FILE_EXECUTE access, then set the FileObject bit.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( IrpSp->Parameters.Create.SecurityContext->DesiredAccess,
|
|||
|
FILE_EXECUTE )) {
|
|||
|
|
|||
|
SetFlag( FileObject->Flags, FO_FILE_FAST_IO_READ );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Complete the request.
|
|||
|
//
|
|||
|
|
|||
|
FatCompleteRequest( IrpContext, Irp, Iosb.Status );
|
|||
|
|
|||
|
//
|
|||
|
// Lock volume in drive if we opened a paging file.
|
|||
|
//
|
|||
|
|
|||
|
if (IsPagingFile && NT_SUCCESS(Iosb.Status) &&
|
|||
|
FlagOn(Vcb->VcbState, VCB_STATE_FLAG_REMOVABLE_MEDIA)) {
|
|||
|
|
|||
|
SetFlag(Vcb->VcbState, VCB_STATE_FLAG_BOOT_OR_PAGING_FILE);
|
|||
|
|
|||
|
FatToggleMediaEjectDisable( IrpContext, Vcb, TRUE );
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCommonCreate -> %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
CollectCreateStatistics(Vcb, Iosb.Status);
|
|||
|
|
|||
|
return Iosb.Status;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatOpenVolume (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN ACCESS_MASK DesiredAccess,
|
|||
|
IN USHORT ShareAccess,
|
|||
|
IN ULONG CreateDisposition
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine opens the specified volume for DASD access
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the File object
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denoting the volume being opened
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the share access of the caller
|
|||
|
|
|||
|
CreateDisposition - Supplies the create disposition for this operation
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb = {0,0};
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
BOOLEAN UnwindShareAccess = FALSE;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = FALSE;
|
|||
|
BOOLEAN UnwindVolumeLock = FALSE;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatOpenVolume...\n", 0);
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// Check for proper desired access and rights
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition != FILE_OPEN) &&
|
|||
|
(CreateDisposition != FILE_OPEN_IF)) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If the user does not want to share write or delete then we will try
|
|||
|
// and take out a lock on the volume.
|
|||
|
//
|
|||
|
|
|||
|
if (!FlagOn(ShareAccess, FILE_SHARE_WRITE) &&
|
|||
|
!FlagOn(ShareAccess, FILE_SHARE_DELETE)) {
|
|||
|
|
|||
|
//
|
|||
|
// Do a quick check here for handles on exclusive open.
|
|||
|
//
|
|||
|
|
|||
|
if (!FlagOn(ShareAccess, FILE_SHARE_READ) &&
|
|||
|
!FatIsHandleCountZero( IrpContext, Vcb )) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_SHARING_VIOLATION );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Force Mm to get rid of its referenced file objects.
|
|||
|
//
|
|||
|
|
|||
|
FatFlushFat( IrpContext, Vcb );
|
|||
|
|
|||
|
FatPurgeReferencedFileObjects( IrpContext, Vcb->RootDcb, TRUE );
|
|||
|
|
|||
|
//
|
|||
|
// If the user also does not want to share read then we check
|
|||
|
// if anyone is already using the volume, and if so then we
|
|||
|
// deny the access. If the user wants to share read then
|
|||
|
// we allow the current opens to stay provided they are only
|
|||
|
// readonly opens and deny further opens.
|
|||
|
//
|
|||
|
|
|||
|
if (!FlagOn(ShareAccess, FILE_SHARE_READ)) {
|
|||
|
|
|||
|
if (Vcb->OpenFileCount != 0) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_SHARING_VIOLATION );
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
if (Vcb->ReadOnlyCount != Vcb->OpenFileCount) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_SHARING_VIOLATION );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Lock the volume
|
|||
|
//
|
|||
|
|
|||
|
Vcb->VcbState |= VCB_STATE_FLAG_LOCKED;
|
|||
|
Vcb->FileObjectWithVcbLocked = FileObject;
|
|||
|
UnwindVolumeLock = TRUE;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If the volume is already opened by someone then we need to check
|
|||
|
// the share access
|
|||
|
//
|
|||
|
|
|||
|
if (Vcb->DirectAccessOpenCount > 0) {
|
|||
|
|
|||
|
if (!NT_SUCCESS(Iosb.Status = IoCheckShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Vcb->ShareAccess,
|
|||
|
TRUE ))) {
|
|||
|
|
|||
|
try_return( Iosb.Status );
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Vcb->ShareAccess );
|
|||
|
}
|
|||
|
|
|||
|
UnwindShareAccess = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// Set up the context and section object pointers, and update
|
|||
|
// our reference counts
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserVolumeOpen,
|
|||
|
Vcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
FileObject->SectionObjectPointer = &Vcb->SectionObjectPointers;
|
|||
|
|
|||
|
Vcb->DirectAccessOpenCount += 1;
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
FileObject->Flags |= FO_NO_INTERMEDIATE_BUFFERING;
|
|||
|
|
|||
|
//
|
|||
|
// And set our status to success
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = FILE_OPENED;
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatOpenVolume );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination() || !NT_SUCCESS(Iosb.Status)) {
|
|||
|
|
|||
|
if (UnwindCounts) {
|
|||
|
Vcb->DirectAccessOpenCount -= 1;
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Vcb->ShareAccess ); }
|
|||
|
if (UnwindVolumeLock) { Vcb->VcbState &= ~VCB_STATE_FLAG_LOCKED; }
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatOpenVolume -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatOpenRootDcb (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN ACCESS_MASK DesiredAccess,
|
|||
|
IN USHORT ShareAccess,
|
|||
|
IN ULONG CreateDisposition
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine opens the root dcb for the volume
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the File object
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denoting the volume whose dcb is being opened.
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the share access of the caller
|
|||
|
|
|||
|
CreateDisposition - Supplies the create disposition for this operation
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
PDCB RootDcb;
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
BOOLEAN UnwindShareAccess = FALSE;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = FALSE;
|
|||
|
BOOLEAN RootDcbAcquired = FALSE;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatOpenRootDcb...\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// Locate the root dcb
|
|||
|
//
|
|||
|
|
|||
|
RootDcb = Vcb->RootDcb;
|
|||
|
|
|||
|
//
|
|||
|
// Get the Dcb exlcusive. This is important as cleanup does not
|
|||
|
// acquire the Vcb.
|
|||
|
//
|
|||
|
|
|||
|
(VOID)FatAcquireExclusiveFcb( IrpContext, RootDcb );
|
|||
|
RootDcbAcquired = TRUE;
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// Check the create disposition and desired access
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition != FILE_OPEN) &&
|
|||
|
(CreateDisposition != FILE_OPEN_IF)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If the Root dcb is already opened by someone then we need
|
|||
|
// to check the share access
|
|||
|
//
|
|||
|
|
|||
|
if (RootDcb->OpenCount > 0) {
|
|||
|
|
|||
|
if (!NT_SUCCESS(Iosb.Status = IoCheckShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&RootDcb->ShareAccess,
|
|||
|
TRUE ))) {
|
|||
|
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&RootDcb->ShareAccess );
|
|||
|
}
|
|||
|
|
|||
|
UnwindShareAccess = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers, and update
|
|||
|
// our reference counts
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserDirectoryOpen,
|
|||
|
RootDcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
RootDcb->UncleanCount += 1;
|
|||
|
RootDcb->OpenCount += 1;
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// And set our status to success
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = FILE_OPENED;
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatOpenRootDcb );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindCounts) {
|
|||
|
RootDcb->UncleanCount -= 1;
|
|||
|
RootDcb->OpenCount -= 1;
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &RootDcb->ShareAccess ); }
|
|||
|
}
|
|||
|
|
|||
|
if (RootDcbAcquired) {
|
|||
|
|
|||
|
FatReleaseFcb( IrpContext, RootDcb );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatOpenRootDcb -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatOpenExistingDcb (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN PDCB Dcb,
|
|||
|
IN ACCESS_MASK DesiredAccess,
|
|||
|
IN USHORT ShareAccess,
|
|||
|
IN ULONG CreateDisposition,
|
|||
|
IN BOOLEAN NoEaKnowledge,
|
|||
|
IN BOOLEAN DeleteOnClose
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine opens the specified existing dcb
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the File object
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denoting the volume containing the dcb
|
|||
|
|
|||
|
Dcb - Supplies the already existing dcb
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the share access of the caller
|
|||
|
|
|||
|
CreateDisposition - Supplies the create disposition for this operation
|
|||
|
|
|||
|
NoEaKnowledge - This opener doesn't understand Ea's and we fail this
|
|||
|
open if the file has NeedEa's.
|
|||
|
|
|||
|
DeleteOnClose - The caller wants the file gone when the handle is closed
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
PBCB DirentBcb = NULL;
|
|||
|
PDIRENT Dirent;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
BOOLEAN UnwindShareAccess = FALSE;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = FALSE;
|
|||
|
BOOLEAN DcbAcquired = FALSE;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatOpenExistingDcb...\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// Get the Dcb exlcusive. This is important as cleanup does not
|
|||
|
// acquire the Vcb.
|
|||
|
//
|
|||
|
|
|||
|
(VOID)FatAcquireExclusiveFcb( IrpContext, Dcb );
|
|||
|
DcbAcquired = TRUE;
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// If the caller has no Ea knowledge, we immediately check for
|
|||
|
// Need Ea's on the file. We don't need to check for ea's on the
|
|||
|
// root directory, because it never has any.
|
|||
|
//
|
|||
|
|
|||
|
if (NoEaKnowledge && NodeType(Dcb) != FAT_NTC_ROOT_DCB) {
|
|||
|
|
|||
|
ULONG NeedEaCount;
|
|||
|
|
|||
|
//
|
|||
|
// Get the dirent for the file and then check that the need
|
|||
|
// ea count is 0.
|
|||
|
//
|
|||
|
|
|||
|
FatGetDirentFromFcbOrDcb( IrpContext,
|
|||
|
Dcb,
|
|||
|
&Dirent,
|
|||
|
&DirentBcb );
|
|||
|
|
|||
|
FatGetNeedEaCount( IrpContext,
|
|||
|
Vcb,
|
|||
|
Dirent,
|
|||
|
&NeedEaCount );
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
|
|||
|
if (NeedEaCount != 0) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check the create disposition and desired access
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition != FILE_OPEN) &&
|
|||
|
(CreateDisposition != FILE_OPEN_IF)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
if (!FatCheckFileAccess( IrpContext,
|
|||
|
Dcb->DirentFatFlags,
|
|||
|
DesiredAccess)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If the dcb is already opened by someone then we need
|
|||
|
// to check the share access
|
|||
|
//
|
|||
|
|
|||
|
if (Dcb->OpenCount > 0) {
|
|||
|
|
|||
|
if (!NT_SUCCESS(Iosb.Status = IoCheckShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Dcb->ShareAccess,
|
|||
|
TRUE ))) {
|
|||
|
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Dcb->ShareAccess );
|
|||
|
}
|
|||
|
|
|||
|
UnwindShareAccess = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers, and update
|
|||
|
// our reference counts
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserDirectoryOpen,
|
|||
|
Dcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
Dcb->UncleanCount += 1;
|
|||
|
Dcb->OpenCount += 1;
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// Mark the delete on close bit if the caller asked for that.
|
|||
|
//
|
|||
|
|
|||
|
{
|
|||
|
PCCB Ccb = (PCCB)FileObject->FsContext2;
|
|||
|
|
|||
|
|
|||
|
if (DeleteOnClose) {
|
|||
|
|
|||
|
SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
|
|||
|
}
|
|||
|
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// In case this was set, clear it now.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag(Dcb->FcbState, FCB_STATE_DELAY_CLOSE);
|
|||
|
|
|||
|
//
|
|||
|
// And set our status to success
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = FILE_OPENED;
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatOpenExistingDcb );
|
|||
|
|
|||
|
//
|
|||
|
// Unpin the Dirent Bcb if pinned.
|
|||
|
//
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindCounts) {
|
|||
|
Dcb->UncleanCount -= 1;
|
|||
|
Dcb->OpenCount -= 1;
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Dcb->ShareAccess ); }
|
|||
|
}
|
|||
|
|
|||
|
if (DcbAcquired) {
|
|||
|
|
|||
|
FatReleaseFcb( IrpContext, Dcb );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatOpenExistingDcb -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatOpenExistingFcb (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN PFCB Fcb,
|
|||
|
IN ACCESS_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 NoEaKnowledge,
|
|||
|
IN BOOLEAN DeleteOnClose,
|
|||
|
IN BOOLEAN FileNameOpenedDos,
|
|||
|
OUT PBOOLEAN OplockPostIrp
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine opens the specified existing fcb
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the File object
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denoting the volume containing the Fcb
|
|||
|
|
|||
|
Fcb - Supplies the already existing fcb
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the share access of the caller
|
|||
|
|
|||
|
AllocationSize - Supplies the initial allocation if the file is being
|
|||
|
superseded or overwritten
|
|||
|
|
|||
|
EaBuffer - Supplies the Ea set if the file is being superseded or
|
|||
|
overwritten
|
|||
|
|
|||
|
EaLength - Supplies the size, in byte, of the EaBuffer
|
|||
|
|
|||
|
FileAttributes - Supplies file attributes to use if the file is being
|
|||
|
superseded or overwritten
|
|||
|
|
|||
|
CreateDisposition - Supplies the create disposition for this operation
|
|||
|
|
|||
|
NoEaKnowledge - This opener doesn't understand Ea's and we fail this
|
|||
|
open if the file has NeedEa's.
|
|||
|
|
|||
|
DeleteOnClose - The caller wants the file gone when the handle is closed
|
|||
|
|
|||
|
FileNameOpenedDos - The caller hit the short side of the name pair finding
|
|||
|
this file
|
|||
|
|
|||
|
OplockPostIrp - Address to store boolean indicating if the Irp needs to
|
|||
|
be posted to the Fsp.
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
|
|||
|
PBCB DirentBcb = NULL;
|
|||
|
PDIRENT Dirent;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
BOOLEAN UnwindShareAccess = FALSE;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = FALSE;
|
|||
|
BOOLEAN DecrementFcbOpenCount = FALSE;
|
|||
|
BOOLEAN FcbAcquired = FALSE;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatOpenExistingFcb...\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// Get the Fcb exlcusive. This is important as cleanup does not
|
|||
|
// acquire the Vcb.
|
|||
|
|
|||
|
//
|
|||
|
|
|||
|
(VOID)FatAcquireExclusiveFcb( IrpContext, Fcb );
|
|||
|
FcbAcquired = TRUE;
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
*OplockPostIrp = FALSE;
|
|||
|
|
|||
|
//
|
|||
|
// Take special action if there is a current batch oplock or
|
|||
|
// batch oplock break in process on the Fcb.
|
|||
|
//
|
|||
|
|
|||
|
if (FsRtlCurrentBatchOplock( &Fcb->Specific.Fcb.Oplock )) {
|
|||
|
|
|||
|
//
|
|||
|
// We remember if a batch oplock break is underway for the
|
|||
|
// case where the sharing check fails.
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Information = FILE_OPBATCH_BREAK_UNDERWAY;
|
|||
|
|
|||
|
Iosb.Status = FsRtlCheckOplock( &Fcb->Specific.Fcb.Oplock,
|
|||
|
IrpContext->OriginatingIrp,
|
|||
|
IrpContext,
|
|||
|
FatOplockComplete,
|
|||
|
FatPrePostIrp );
|
|||
|
|
|||
|
if (Iosb.Status != STATUS_SUCCESS
|
|||
|
&& Iosb.Status != STATUS_OPLOCK_BREAK_IN_PROGRESS) {
|
|||
|
|
|||
|
*OplockPostIrp = TRUE;
|
|||
|
try_return( NOTHING );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check if the user wanted to create the file, also special case
|
|||
|
// the supersede and overwrite options. Those add additional
|
|||
|
// desired accesses to the caller
|
|||
|
//
|
|||
|
|
|||
|
if (CreateDisposition == FILE_CREATE) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
|
|||
|
try_return( Iosb );
|
|||
|
|
|||
|
} else if (CreateDisposition == FILE_SUPERSEDE) {
|
|||
|
|
|||
|
DesiredAccess |= DELETE;
|
|||
|
|
|||
|
} else if ((CreateDisposition == FILE_OVERWRITE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE_IF)) {
|
|||
|
|
|||
|
DesiredAccess |= FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check the desired access
|
|||
|
//
|
|||
|
|
|||
|
if (!FatCheckFileAccess( IrpContext,
|
|||
|
Fcb->DirentFatFlags,
|
|||
|
DesiredAccess )) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check for trying to delete a read only file.
|
|||
|
//
|
|||
|
|
|||
|
if (DeleteOnClose &&
|
|||
|
FlagOn( Fcb->DirentFatFlags, FAT_DIRENT_ATTR_READ_ONLY )) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_CANNOT_DELETE;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If we are asked to do an overwrite or supersede operation then
|
|||
|
// deny access for files where the file attributes for system and
|
|||
|
// hidden do not match
|
|||
|
//
|
|||
|
|
|||
|
|
|||
|
if ((CreateDisposition == FILE_SUPERSEDE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE_IF)) {
|
|||
|
|
|||
|
BOOLEAN Hidden;
|
|||
|
BOOLEAN System;
|
|||
|
|
|||
|
Hidden = BooleanFlagOn(Fcb->DirentFatFlags, FAT_DIRENT_ATTR_HIDDEN );
|
|||
|
System = BooleanFlagOn(Fcb->DirentFatFlags, FAT_DIRENT_ATTR_SYSTEM );
|
|||
|
|
|||
|
if ((Hidden && !FlagOn(FileAttributes, FILE_ATTRIBUTE_HIDDEN)) ||
|
|||
|
(System && !FlagOn(FileAttributes, FILE_ATTRIBUTE_SYSTEM))) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "The hidden and/or system bits do not match\n", 0);
|
|||
|
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
#if defined(WE_WON_ON_APPEAL) && !defined(DOUBLE_SPACE_WRITE)
|
|||
|
|
|||
|
if (Vcb->Dscb != NULL) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
#endif
|
|||
|
|
|||
|
//
|
|||
|
// If this media is write protected, don't even try the create.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
|
|||
|
|
|||
|
//
|
|||
|
// Set the real device for the pop-up info, and set the verify
|
|||
|
// bit in the device object, so that we will force a verify
|
|||
|
// in case the user put the correct media back in.
|
|||
|
//
|
|||
|
|
|||
|
IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
|
|||
|
Vcb->Vpb->RealDevice );
|
|||
|
|
|||
|
SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
|
|||
|
|
|||
|
FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check if the Fcb has the proper share access
|
|||
|
//
|
|||
|
|
|||
|
if (!NT_SUCCESS(Iosb.Status = IoCheckShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Fcb->ShareAccess,
|
|||
|
FALSE ))) {
|
|||
|
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now check that we can continue based on the oplock state of the
|
|||
|
// file.
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = FsRtlCheckOplock( &Fcb->Specific.Fcb.Oplock,
|
|||
|
IrpContext->OriginatingIrp,
|
|||
|
IrpContext,
|
|||
|
FatOplockComplete,
|
|||
|
FatPrePostIrp );
|
|||
|
|
|||
|
if (Iosb.Status != STATUS_SUCCESS
|
|||
|
&& Iosb.Status != STATUS_OPLOCK_BREAK_IN_PROGRESS) {
|
|||
|
|
|||
|
*OplockPostIrp = TRUE;
|
|||
|
try_return( NOTHING );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Set the flag indicating if Fast I/O is possible
|
|||
|
//
|
|||
|
|
|||
|
Fcb->Header.IsFastIoPossible = FatIsFastIoPossible( Fcb );
|
|||
|
|
|||
|
//
|
|||
|
// If the user wants write access access to the file make sure there
|
|||
|
// is not a process mapping this file as an image. Any attempt to
|
|||
|
// delete the file will be stopped in fileinfo.c
|
|||
|
//
|
|||
|
// If the user wants to delete on close, we must check at this
|
|||
|
// point though.
|
|||
|
//
|
|||
|
|
|||
|
if ( FlagOn(DesiredAccess, FILE_WRITE_DATA) || DeleteOnClose ) {
|
|||
|
|
|||
|
Fcb->OpenCount += 1;
|
|||
|
DecrementFcbOpenCount = TRUE;
|
|||
|
|
|||
|
if (!MmFlushImageSection( &Fcb->NonPaged->SectionObjectPointers,
|
|||
|
MmFlushForWrite )) {
|
|||
|
|
|||
|
Iosb.Status = DeleteOnClose ? STATUS_CANNOT_DELETE :
|
|||
|
STATUS_SHARING_VIOLATION;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If this is a non-cached open, and there are no open cached
|
|||
|
// handles, but there is a still a data section, attempt a flush
|
|||
|
// and purge operation to avoid cache coherency overhead later.
|
|||
|
// We ignore any I/O errors from the flush.
|
|||
|
//
|
|||
|
// We set the CREATE_IN_PROGRESS flag to prevent the Fcb from
|
|||
|
// going away out from underneath us.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING) &&
|
|||
|
(Fcb->UncleanCount == Fcb->NonCachedUncleanCount) &&
|
|||
|
(Fcb->NonPaged->SectionObjectPointers.DataSectionObject != NULL)) {
|
|||
|
|
|||
|
SetFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
|
|||
|
|
|||
|
CcFlushCache( &Fcb->NonPaged->SectionObjectPointers, NULL, 0, NULL );
|
|||
|
CcPurgeCacheSection( &Fcb->NonPaged->SectionObjectPointers,
|
|||
|
NULL,
|
|||
|
0,
|
|||
|
FALSE );
|
|||
|
|
|||
|
ClearFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check if the user only wanted to open the file
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition == FILE_OPEN) ||
|
|||
|
(CreateDisposition == FILE_OPEN_IF)) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Doing open operation\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// If the caller has no Ea knowledge, we immediately check for
|
|||
|
// Need Ea's on the file.
|
|||
|
//
|
|||
|
|
|||
|
if (NoEaKnowledge) {
|
|||
|
|
|||
|
ULONG NeedEaCount;
|
|||
|
|
|||
|
//
|
|||
|
// Get the dirent for the file and then check that the need
|
|||
|
// ea count is 0.
|
|||
|
//
|
|||
|
|
|||
|
FatGetDirentFromFcbOrDcb( IrpContext,
|
|||
|
Fcb,
|
|||
|
&Dirent,
|
|||
|
&DirentBcb );
|
|||
|
|
|||
|
FatGetNeedEaCount( IrpContext,
|
|||
|
Vcb,
|
|||
|
Dirent,
|
|||
|
&NeedEaCount );
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
|
|||
|
if (NeedEaCount != 0) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Everything checks out okay, so setup the context and
|
|||
|
// section object pointers.
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserFileOpen,
|
|||
|
Fcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
FileObject->SectionObjectPointer = &Fcb->NonPaged->SectionObjectPointers;
|
|||
|
|
|||
|
//
|
|||
|
// Fill in the information field, the status field is already
|
|||
|
// set.
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Information = FILE_OPENED;
|
|||
|
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check if we are to supersede/overwrite the file, we can wait for
|
|||
|
// any I/O at this point
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition == FILE_SUPERSEDE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE_IF)) {
|
|||
|
|
|||
|
NTSTATUS OldStatus;
|
|||
|
|
|||
|
PACCESS_STATE AccessState;
|
|||
|
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( IrpContext->OriginatingIrp );
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Doing supersede/overwrite operation\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// We check if the caller wants ACCESS_SYSTEM_SECURITY access on this
|
|||
|
// directory and fail the request if he does.
|
|||
|
//
|
|||
|
|
|||
|
AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
|
|||
|
|
|||
|
//
|
|||
|
// Check if the remaining privilege includes ACCESS_SYSTEM_SECURITY.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY )) {
|
|||
|
|
|||
|
if (!SeSinglePrivilegeCheck( FatSecurityPrivilege,
|
|||
|
UserMode )) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Move this privilege from the Remaining access to Granted access.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
SetFlag( AccessState->PreviouslyGrantedAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// And overwrite the file. We remember the previous status
|
|||
|
// code because it may contain information about
|
|||
|
// the oplock status.
|
|||
|
//
|
|||
|
|
|||
|
OldStatus = Iosb.Status;
|
|||
|
|
|||
|
Iosb = FatSupersedeOrOverwriteFile( IrpContext,
|
|||
|
FileObject,
|
|||
|
Fcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
AllocationSize,
|
|||
|
EaBuffer,
|
|||
|
EaLength,
|
|||
|
FileAttributes,
|
|||
|
CreateDisposition,
|
|||
|
NoEaKnowledge );
|
|||
|
|
|||
|
if (Iosb.Status == STATUS_SUCCESS) {
|
|||
|
|
|||
|
Iosb.Status = OldStatus;
|
|||
|
}
|
|||
|
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If we ever get here then the I/O system gave us some bad input
|
|||
|
//
|
|||
|
|
|||
|
FatBugCheck( CreateDisposition, 0, 0 );
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
|
|||
|
//
|
|||
|
// Update the share access and counts if successful
|
|||
|
//
|
|||
|
|
|||
|
if ((Iosb.Status != STATUS_PENDING) && NT_SUCCESS(Iosb.Status)) {
|
|||
|
|
|||
|
IoUpdateShareAccess( FileObject, &Fcb->ShareAccess );
|
|||
|
UnwindShareAccess = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// In case this was set, clear it now.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag(Fcb->FcbState, FCB_STATE_DELAY_CLOSE);
|
|||
|
|
|||
|
Fcb->UncleanCount += 1;
|
|||
|
Fcb->OpenCount += 1;
|
|||
|
if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
|
|||
|
Fcb->NonCachedUncleanCount += 1;
|
|||
|
}
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
|
|||
|
{
|
|||
|
PCCB Ccb;
|
|||
|
Ccb = (PCCB)FileObject->FsContext2;
|
|||
|
|
|||
|
//
|
|||
|
// Mark the DeleteOnClose bit if the operation was successful.
|
|||
|
//
|
|||
|
|
|||
|
if ( DeleteOnClose ) {
|
|||
|
|
|||
|
SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Mark the OpenedByShortName bit if the operation was successful.
|
|||
|
//
|
|||
|
|
|||
|
if ( FileNameOpenedDos ) {
|
|||
|
|
|||
|
SetFlag( Ccb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
}
|
|||
|
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatOpenExistingFcb );
|
|||
|
|
|||
|
//
|
|||
|
// Unpin the Dirent Bcb if pinned.
|
|||
|
//
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindCounts) {
|
|||
|
Fcb->UncleanCount -= 1;
|
|||
|
Fcb->OpenCount -= 1;
|
|||
|
if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
|
|||
|
Fcb->NonCachedUncleanCount -= 1;
|
|||
|
}
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Fcb->ShareAccess ); }
|
|||
|
}
|
|||
|
|
|||
|
if (DecrementFcbOpenCount) {
|
|||
|
|
|||
|
Fcb->OpenCount -= 1;
|
|||
|
if (Fcb->OpenCount == 0) { FatDeleteFcb( IrpContext, Fcb ); }
|
|||
|
}
|
|||
|
|
|||
|
if (FcbAcquired) {
|
|||
|
|
|||
|
FatReleaseFcb( IrpContext, Fcb );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatOpenExistingFcb -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatOpenTargetDirectory (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PDCB Dcb,
|
|||
|
IN ACCESS_MASK DesiredAccess,
|
|||
|
IN USHORT ShareAccess,
|
|||
|
IN BOOLEAN DoesNameExist
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine opens the target directory and replaces the name in the
|
|||
|
file object with the remaining name.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the File object
|
|||
|
|
|||
|
Dcb - Supplies an already existing dcb that we are going to open
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the share access of the caller
|
|||
|
|
|||
|
DoesNameExist - Indicates if the file name already exists in the
|
|||
|
target directory.
|
|||
|
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
BOOLEAN UnwindShareAccess = FALSE;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = FALSE;
|
|||
|
BOOLEAN DcbAcquired = FALSE;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatOpenTargetDirectory...\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// Get the Dcb exlcusive. This is important as cleanup does not
|
|||
|
// acquire the Vcb.
|
|||
|
//
|
|||
|
|
|||
|
(VOID)FatAcquireExclusiveFcb( IrpContext, Dcb );
|
|||
|
DcbAcquired = TRUE;
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
ULONG i;
|
|||
|
|
|||
|
//
|
|||
|
// If the Dcb is already opened by someone then we need
|
|||
|
// to check the share access
|
|||
|
//
|
|||
|
|
|||
|
if (Dcb->OpenCount > 0) {
|
|||
|
|
|||
|
if (!NT_SUCCESS(Iosb.Status = IoCheckShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Dcb->ShareAccess,
|
|||
|
TRUE ))) {
|
|||
|
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Dcb->ShareAccess );
|
|||
|
}
|
|||
|
|
|||
|
UnwindShareAccess = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers, and update
|
|||
|
// our reference counts
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserDirectoryOpen,
|
|||
|
Dcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
Dcb->UncleanCount += 1;
|
|||
|
Dcb->OpenCount += 1;
|
|||
|
Dcb->Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Dcb->Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// Update the name in the file object, by definition the remaining
|
|||
|
// part must be shorter than the original file name so we'll just
|
|||
|
// overwrite the file name.
|
|||
|
//
|
|||
|
|
|||
|
i = FileObject->FileName.Length/sizeof(WCHAR) - 1;
|
|||
|
|
|||
|
//
|
|||
|
// Get rid of a trailing backslash
|
|||
|
//
|
|||
|
|
|||
|
if (FileObject->FileName.Buffer[i] == L'\\') {
|
|||
|
|
|||
|
ASSERT(i != 0);
|
|||
|
|
|||
|
FileObject->FileName.Length -= sizeof(WCHAR);
|
|||
|
i -= 1;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Find the first non-backslash character. i will be its index.
|
|||
|
//
|
|||
|
|
|||
|
while (TRUE) {
|
|||
|
|
|||
|
if (FileObject->FileName.Buffer[i] == L'\\') {
|
|||
|
|
|||
|
i += 1;
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
if (i == 0) {
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
i--;
|
|||
|
}
|
|||
|
|
|||
|
if (i) {
|
|||
|
|
|||
|
FileObject->FileName.Length -= (USHORT)(i * sizeof(WCHAR));
|
|||
|
|
|||
|
RtlCopyMemory( &FileObject->FileName.Buffer[0],
|
|||
|
&FileObject->FileName.Buffer[i],
|
|||
|
FileObject->FileName.Length );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// And set our status to success
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = (DoesNameExist ? FILE_EXISTS : FILE_DOES_NOT_EXIST);
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatOpenTargetDirectory );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindCounts) {
|
|||
|
Dcb->UncleanCount -= 1;
|
|||
|
Dcb->OpenCount -= 1;
|
|||
|
Dcb->Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Dcb->Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Dcb->ShareAccess ); }
|
|||
|
}
|
|||
|
|
|||
|
if (DcbAcquired) {
|
|||
|
|
|||
|
FatReleaseFcb( IrpContext, Dcb );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatOpenTargetDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatOpenExistingDirectory (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN PDCB ParentDcb,
|
|||
|
IN PDIRENT Dirent,
|
|||
|
IN ULONG LfnByteOffset,
|
|||
|
IN ULONG DirentByteOffset,
|
|||
|
IN PUNICODE_STRING Lfn,
|
|||
|
IN ACCESS_MASK DesiredAccess,
|
|||
|
IN USHORT ShareAccess,
|
|||
|
IN ULONG CreateDisposition,
|
|||
|
IN BOOLEAN NoEaKnowledge,
|
|||
|
IN BOOLEAN DeleteOnClose
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine opens the specified directory. The directory has not
|
|||
|
previously been opened.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the File object
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denoting the volume containing the dcb
|
|||
|
|
|||
|
ParentDcb - Supplies the parent directory containing the subdirectory
|
|||
|
to be opened
|
|||
|
|
|||
|
DirectoryName - Supplies the file name of the directory being opened.
|
|||
|
|
|||
|
Dirent - Supplies the dirent for the directory being opened
|
|||
|
|
|||
|
LfnByteOffset - Tells where the Lfn begins. If there is no Lfn
|
|||
|
this field is the same as DirentByteOffset.
|
|||
|
|
|||
|
DirentByteOffset - Supplies the Vbo of the dirent within its parent
|
|||
|
directory
|
|||
|
|
|||
|
Lfn - May supply a long name for the file.
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the share access of the caller
|
|||
|
|
|||
|
CreateDisposition - Supplies the create disposition for this operation
|
|||
|
|
|||
|
NoEaKnowledge - This opener doesn't understand Ea's and we fail this
|
|||
|
open if the file has NeedEa's.
|
|||
|
|
|||
|
DeleteOnClose - The caller wants the file gone when the handle is closed
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
PDCB Dcb;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
PDCB UnwindDcb = NULL;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = FALSE;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatOpenExistingDirectory...\n", 0);
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// If the caller has no Ea knowledge, we immediately check for
|
|||
|
// Need Ea's on the file.
|
|||
|
//
|
|||
|
|
|||
|
if (NoEaKnowledge) {
|
|||
|
|
|||
|
ULONG NeedEaCount;
|
|||
|
|
|||
|
FatGetNeedEaCount( IrpContext,
|
|||
|
Vcb,
|
|||
|
Dirent,
|
|||
|
&NeedEaCount );
|
|||
|
|
|||
|
if (NeedEaCount != 0) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check the create disposition and desired access
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition != FILE_OPEN) &&
|
|||
|
(CreateDisposition != FILE_OPEN_IF)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
if (!FatCheckFileAccess( IrpContext,
|
|||
|
Dirent->Attributes,
|
|||
|
DesiredAccess)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Create a new dcb for the directory
|
|||
|
//
|
|||
|
|
|||
|
Dcb = UnwindDcb = FatCreateDcb( IrpContext,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
LfnByteOffset,
|
|||
|
DirentByteOffset,
|
|||
|
Dirent,
|
|||
|
Lfn );
|
|||
|
|
|||
|
//
|
|||
|
// Setup our share access
|
|||
|
//
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Dcb->ShareAccess );
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers, and update
|
|||
|
// our reference counts
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserDirectoryOpen,
|
|||
|
Dcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
Dcb->UncleanCount += 1;
|
|||
|
Dcb->OpenCount += 1;
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// And set our status to success
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = FILE_OPENED;
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatOpenExistingDirectory );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindCounts) {
|
|||
|
Dcb->UncleanCount -= 1;
|
|||
|
Dcb->OpenCount -= 1;
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindDcb != NULL) { FatDeleteFcb( IrpContext, UnwindDcb ); }
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatOpenExistingDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatOpenExistingFile (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN PDCB ParentDcb,
|
|||
|
IN PDIRENT Dirent,
|
|||
|
IN ULONG LfnByteOffset,
|
|||
|
IN ULONG DirentByteOffset,
|
|||
|
IN PUNICODE_STRING Lfn,
|
|||
|
IN ACCESS_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 NoEaKnowledge,
|
|||
|
IN BOOLEAN DeleteOnClose,
|
|||
|
IN BOOLEAN FileNameOpenedDos
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine opens the specified file. The file has not previously
|
|||
|
been opened.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the File object
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denoting the volume containing the file
|
|||
|
|
|||
|
ParentFcb - Supplies the parent directory containing the file to be
|
|||
|
opened
|
|||
|
|
|||
|
Dirent - Supplies the dirent for the file being opened
|
|||
|
|
|||
|
LfnByteOffset - Tells where the Lfn begins. If there is no Lfn
|
|||
|
this field is the same as DirentByteOffset.
|
|||
|
|
|||
|
DirentByteOffset - Supplies the Vbo of the dirent within its parent
|
|||
|
directory
|
|||
|
|
|||
|
Lfn - May supply a long name for the file.
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the share access of the caller
|
|||
|
|
|||
|
AllocationSize - Supplies the initial allocation if the file is being
|
|||
|
superseded, overwritten, or created.
|
|||
|
|
|||
|
EaBuffer - Supplies the Ea set if the file is being superseded,
|
|||
|
overwritten, or created.
|
|||
|
|
|||
|
EaLength - Supplies the size, in byte, of the EaBuffer
|
|||
|
|
|||
|
FileAttributes - Supplies file attributes to use if the file is being
|
|||
|
superseded, overwritten, or created
|
|||
|
|
|||
|
CreateDisposition - Supplies the create disposition for this operation
|
|||
|
|
|||
|
IsPagingFile - Indicates if this is the paging file being opened.
|
|||
|
|
|||
|
NoEaKnowledge - This opener doesn't understand Ea's and we fail this
|
|||
|
open if the file has NeedEa's.
|
|||
|
|
|||
|
DeleteOnClose - The caller wants the file gone when the handle is closed
|
|||
|
|
|||
|
FileNameOpenedDos - The caller opened this file by hitting the 8.3 side
|
|||
|
of the Lfn/8.3 pair
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
PFCB Fcb;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
PFCB UnwindFcb = NULL;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = FALSE;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatOpenExistingFile...\n", 0);
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// Check if the user wanted to create the file or if access is
|
|||
|
// denied
|
|||
|
//
|
|||
|
|
|||
|
if (CreateDisposition == FILE_CREATE) {
|
|||
|
Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
|
|||
|
try_return( Iosb );
|
|||
|
|
|||
|
} else if ((CreateDisposition == FILE_SUPERSEDE) && !IsPagingFile) {
|
|||
|
|
|||
|
DesiredAccess |= DELETE;
|
|||
|
|
|||
|
} else if (((CreateDisposition == FILE_OVERWRITE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE_IF)) && !IsPagingFile) {
|
|||
|
|
|||
|
DesiredAccess |= FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES;
|
|||
|
}
|
|||
|
|
|||
|
if (!FatCheckFileAccess( IrpContext,
|
|||
|
Dirent->Attributes,
|
|||
|
DesiredAccess)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Check for trying to delete a read only file.
|
|||
|
//
|
|||
|
|
|||
|
if (DeleteOnClose &&
|
|||
|
FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_READ_ONLY )) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_CANNOT_DELETE;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// IF we are asked to do an overwrite or supersede operation then
|
|||
|
// deny access for files where the file attributes for system and
|
|||
|
// hidden do not match
|
|||
|
//
|
|||
|
|
|||
|
if ((CreateDisposition == FILE_SUPERSEDE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE) ||
|
|||
|
(CreateDisposition == FILE_OVERWRITE_IF)) {
|
|||
|
|
|||
|
BOOLEAN Hidden;
|
|||
|
BOOLEAN System;
|
|||
|
|
|||
|
Hidden = BooleanFlagOn(Dirent->Attributes, FAT_DIRENT_ATTR_HIDDEN );
|
|||
|
System = BooleanFlagOn(Dirent->Attributes, FAT_DIRENT_ATTR_SYSTEM );
|
|||
|
|
|||
|
if ((Hidden && !FlagOn(FileAttributes, FILE_ATTRIBUTE_HIDDEN)) ||
|
|||
|
(System && !FlagOn(FileAttributes, FILE_ATTRIBUTE_SYSTEM))) {
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "The hidden and/or system bits do not match\n", 0);
|
|||
|
|
|||
|
if ( !IsPagingFile ) {
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
#if defined(WE_WON_ON_APPEAL) && !defined(DOUBLE_SPACE_WRITE)
|
|||
|
|
|||
|
if (Vcb->Dscb != NULL) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
#endif
|
|||
|
//
|
|||
|
// If this media is write protected, don't even try the create.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
|
|||
|
|
|||
|
//
|
|||
|
// Set the real device for the pop-up info, and set the verify
|
|||
|
// bit in the device object, so that we will force a verify
|
|||
|
// in case the user put the correct media back in.
|
|||
|
//
|
|||
|
|
|||
|
|
|||
|
IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
|
|||
|
Vcb->Vpb->RealDevice );
|
|||
|
|
|||
|
SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
|
|||
|
|
|||
|
FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Create a new Fcb for the file, and set the file size in
|
|||
|
// the fcb.
|
|||
|
//
|
|||
|
|
|||
|
Fcb = UnwindFcb = FatCreateFcb( IrpContext,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
LfnByteOffset,
|
|||
|
DirentByteOffset,
|
|||
|
Dirent,
|
|||
|
Lfn,
|
|||
|
IsPagingFile );
|
|||
|
|
|||
|
//
|
|||
|
// Get the starting cluster of the aqllocation, and if it is zero,
|
|||
|
// there is no allocation, so note it in the Fcb.
|
|||
|
//
|
|||
|
|
|||
|
Fcb->FirstClusterOfFile = (ULONG)Dirent->FirstClusterOfFile;
|
|||
|
|
|||
|
if ( Fcb->FirstClusterOfFile == 0 ) {
|
|||
|
|
|||
|
Fcb->Header.AllocationSize.QuadPart = 0;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// If this is a paging file, lookup the allocation size so that
|
|||
|
// the Mcb is always valid, and mark this a system file to prevent
|
|||
|
// it from being opened.
|
|||
|
//
|
|||
|
|
|||
|
if (IsPagingFile) {
|
|||
|
|
|||
|
FatLookupFileAllocationSize( IrpContext, Fcb );
|
|||
|
SetFlag( Fcb->FcbState, FCB_STATE_SYSTEM_FILE );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now case on whether we are to simply open, supersede, or
|
|||
|
// overwrite the file.
|
|||
|
//
|
|||
|
|
|||
|
switch (CreateDisposition) {
|
|||
|
|
|||
|
case FILE_OPEN:
|
|||
|
case FILE_OPEN_IF:
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Doing only an open operation\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// If the caller has no Ea knowledge, we immediately check for
|
|||
|
// Need Ea's on the file.
|
|||
|
//
|
|||
|
|
|||
|
if (NoEaKnowledge) {
|
|||
|
|
|||
|
ULONG NeedEaCount;
|
|||
|
|
|||
|
FatGetNeedEaCount( IrpContext,
|
|||
|
Vcb,
|
|||
|
Dirent,
|
|||
|
&NeedEaCount );
|
|||
|
|
|||
|
if (NeedEaCount != 0) {
|
|||
|
|
|||
|
FatRaiseStatus( IrpContext, STATUS_ACCESS_DENIED );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers.
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserFileOpen,
|
|||
|
Fcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
FileObject->SectionObjectPointer = &Fcb->NonPaged->SectionObjectPointers;
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = FILE_OPENED;
|
|||
|
break;
|
|||
|
|
|||
|
case FILE_SUPERSEDE:
|
|||
|
case FILE_OVERWRITE:
|
|||
|
case FILE_OVERWRITE_IF:
|
|||
|
|
|||
|
{
|
|||
|
PACCESS_STATE AccessState;
|
|||
|
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( IrpContext->OriginatingIrp );
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Doing supersede/overwrite operation\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// We check if the caller wants ACCESS_SYSTEM_SECURITY access on this
|
|||
|
// directory and fail the request if he does.
|
|||
|
//
|
|||
|
|
|||
|
AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
|
|||
|
|
|||
|
//
|
|||
|
// Check if the remaining privilege includes ACCESS_SYSTEM_SECURITY.
|
|||
|
//
|
|||
|
|
|||
|
if (FlagOn( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY )) {
|
|||
|
|
|||
|
if (!SeSinglePrivilegeCheck( FatSecurityPrivilege,
|
|||
|
UserMode )) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
try_return( Iosb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Move this privilege from the Remaining access to Granted access.
|
|||
|
//
|
|||
|
|
|||
|
ClearFlag( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
SetFlag( AccessState->PreviouslyGrantedAccess, ACCESS_SYSTEM_SECURITY );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
Iosb = FatSupersedeOrOverwriteFile( IrpContext,
|
|||
|
FileObject,
|
|||
|
Fcb,
|
|||
|
DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
AllocationSize,
|
|||
|
EaBuffer,
|
|||
|
EaLength,
|
|||
|
FileAttributes,
|
|||
|
CreateDisposition,
|
|||
|
NoEaKnowledge );
|
|||
|
break;
|
|||
|
|
|||
|
default:
|
|||
|
|
|||
|
DebugTrace(0, Dbg, "Illegal Create Disposition\n", 0);
|
|||
|
|
|||
|
FatBugCheck( CreateDisposition, 0, 0 );
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
|
|||
|
//
|
|||
|
// Setup our share access and counts if things were successful.
|
|||
|
//
|
|||
|
|
|||
|
if ((Iosb.Status != STATUS_PENDING) && NT_SUCCESS(Iosb.Status)) {
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Fcb->ShareAccess );
|
|||
|
|
|||
|
Fcb->UncleanCount += 1;
|
|||
|
Fcb->OpenCount += 1;
|
|||
|
if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
|
|||
|
Fcb->NonCachedUncleanCount += 1;
|
|||
|
}
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
}
|
|||
|
|
|||
|
{
|
|||
|
PCCB Ccb;
|
|||
|
Ccb = (PCCB)FileObject->FsContext2;
|
|||
|
|
|||
|
if ( NT_SUCCESS(Iosb.Status) ) {
|
|||
|
|
|||
|
//
|
|||
|
// Mark the DeleteOnClose bit if the operation was successful.
|
|||
|
//
|
|||
|
|
|||
|
if ( DeleteOnClose ) {
|
|||
|
|
|||
|
SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Mark the OpenedByShortName bit if the operation was successful.
|
|||
|
//
|
|||
|
|
|||
|
if ( FileNameOpenedDos ) {
|
|||
|
|
|||
|
SetFlag( Ccb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatOpenExistingFile );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindCounts) {
|
|||
|
Fcb->UncleanCount -= 1;
|
|||
|
Fcb->OpenCount -= 1;
|
|||
|
if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
|
|||
|
Fcb->NonCachedUncleanCount -= 1;
|
|||
|
}
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindFcb != NULL) { FatDeleteFcb( IrpContext, UnwindFcb ); }
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatOpenExistingFile -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatCreateNewDirectory (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN PDCB ParentDcb,
|
|||
|
IN POEM_STRING OemName,
|
|||
|
IN PUNICODE_STRING UnicodeName,
|
|||
|
IN ACCESS_MASK DesiredAccess,
|
|||
|
IN USHORT ShareAccess,
|
|||
|
IN PFILE_FULL_EA_INFORMATION EaBuffer,
|
|||
|
IN ULONG EaLength,
|
|||
|
IN UCHAR FileAttributes,
|
|||
|
IN BOOLEAN NoEaKnowledge,
|
|||
|
IN BOOLEAN DeleteOnClose
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine creates a new directory. The directory has already been
|
|||
|
verified not to exist yet.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the file object for the newly created directory
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denote the volume to contain the new directory
|
|||
|
|
|||
|
ParentDcb - Supplies the parent directory containg the newly created
|
|||
|
directory
|
|||
|
|
|||
|
OemName - Supplies the Oem name for the newly created directory. It may
|
|||
|
or maynot be 8.3 complient, but will be upcased.
|
|||
|
|
|||
|
UnicodeName - Supplies the Unicode name for the newly created directory.
|
|||
|
It may or maynot be 8.3 complient. This name contains the original
|
|||
|
case information.
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the shared access of the caller
|
|||
|
|
|||
|
EaBuffer - Supplies the Ea set for the newly created directory
|
|||
|
|
|||
|
EaLength - Supplies the length, in bytes, of EaBuffer
|
|||
|
|
|||
|
FileAttributes - Supplies the file attributes for the newly created
|
|||
|
directory.
|
|||
|
|
|||
|
NoEaKnowledge - This opener doesn't understand Ea's and we fail this
|
|||
|
open if the file has NeedEa's.
|
|||
|
|
|||
|
DeleteOnClose - The caller wants the file gone when the handle is closed
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
|
|||
|
PDCB Dcb = NULL;
|
|||
|
PCCB Ccb = NULL;
|
|||
|
|
|||
|
PDIRENT Dirent = NULL;
|
|||
|
PBCB DirentBcb = NULL;
|
|||
|
ULONG DirentsNeeded;
|
|||
|
ULONG DirentByteOffset;
|
|||
|
|
|||
|
PDIRENT ShortDirent;
|
|||
|
ULONG ShortDirentByteOffset;
|
|||
|
|
|||
|
USHORT EaHandle;
|
|||
|
|
|||
|
BOOLEAN AllLowerComponent;
|
|||
|
BOOLEAN AllLowerExtension;
|
|||
|
BOOLEAN CreateLfn;
|
|||
|
|
|||
|
ULONG BytesInFirstPage;
|
|||
|
ULONG DirentsInFirstPage;
|
|||
|
PDIRENT FirstPageDirent;
|
|||
|
|
|||
|
PBCB SecondPageBcb = NULL;
|
|||
|
ULONG SecondPageOffset;
|
|||
|
PDIRENT SecondPageDirent;
|
|||
|
|
|||
|
BOOLEAN DirentFromPool = FALSE;
|
|||
|
|
|||
|
OEM_STRING ShortName;
|
|||
|
UCHAR ShortNameBuffer[12];
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatCreateNewDirectory...\n", 0);
|
|||
|
|
|||
|
ShortName.Length = 0;
|
|||
|
ShortName.MaximumLength = 12;
|
|||
|
ShortName.Buffer = &ShortNameBuffer[0];
|
|||
|
|
|||
|
EaHandle = 0;
|
|||
|
|
|||
|
//
|
|||
|
// We fail this operation if the caller doesn't understand Ea's.
|
|||
|
//
|
|||
|
|
|||
|
if (NoEaKnowledge
|
|||
|
&& EaLength > 0) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCreateNewDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// DeleteOnClose and ReadOnly are not compatible.
|
|||
|
//
|
|||
|
|
|||
|
if (DeleteOnClose && FlagOn(FileAttributes, FAT_DIRENT_ATTR_READ_ONLY)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_CANNOT_DELETE;
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
// Now get the names that we will be using.
|
|||
|
//
|
|||
|
|
|||
|
FatSelectNames( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
OemName,
|
|||
|
UnicodeName,
|
|||
|
&ShortName,
|
|||
|
NULL,
|
|||
|
&AllLowerComponent,
|
|||
|
&AllLowerExtension,
|
|||
|
&CreateLfn );
|
|||
|
|
|||
|
//
|
|||
|
// If we are not in Chicago mode, ignore the magic bits.
|
|||
|
//
|
|||
|
|
|||
|
if (!FatData.ChicagoMode) {
|
|||
|
|
|||
|
AllLowerComponent = FALSE;
|
|||
|
AllLowerExtension = FALSE;
|
|||
|
CreateLfn = FALSE;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Create/allocate a new dirent
|
|||
|
//
|
|||
|
|
|||
|
DirentsNeeded = CreateLfn ? FAT_LFN_DIRENTS_NEEDED(UnicodeName) + 1 : 1;
|
|||
|
|
|||
|
DirentByteOffset = FatCreateNewDirent( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
DirentsNeeded );
|
|||
|
try {
|
|||
|
|
|||
|
FatPrepareWriteDirectoryFile( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
DirentByteOffset,
|
|||
|
sizeof(DIRENT),
|
|||
|
&DirentBcb,
|
|||
|
&Dirent,
|
|||
|
FALSE,
|
|||
|
&Iosb.Status );
|
|||
|
|
|||
|
ASSERT( NT_SUCCESS( Iosb.Status ) );
|
|||
|
|
|||
|
//
|
|||
|
// Deal with the special case of an LFN + Dirent structure crossing
|
|||
|
// a page boundry.
|
|||
|
//
|
|||
|
|
|||
|
if ((DirentByteOffset / PAGE_SIZE) !=
|
|||
|
((DirentByteOffset + (DirentsNeeded - 1) * sizeof(DIRENT)) / PAGE_SIZE)) {
|
|||
|
|
|||
|
SecondPageBcb;
|
|||
|
SecondPageOffset;
|
|||
|
SecondPageDirent;
|
|||
|
|
|||
|
SecondPageOffset = (DirentByteOffset & ~(PAGE_SIZE - 1)) + PAGE_SIZE;
|
|||
|
|
|||
|
BytesInFirstPage = SecondPageOffset - DirentByteOffset;
|
|||
|
|
|||
|
DirentsInFirstPage = BytesInFirstPage / sizeof(DIRENT);
|
|||
|
|
|||
|
FatPrepareWriteDirectoryFile( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
SecondPageOffset,
|
|||
|
sizeof(DIRENT),
|
|||
|
&SecondPageBcb,
|
|||
|
&SecondPageDirent,
|
|||
|
FALSE,
|
|||
|
&Iosb.Status );
|
|||
|
|
|||
|
ASSERT( NT_SUCCESS( Iosb.Status ) );
|
|||
|
|
|||
|
FirstPageDirent = Dirent;
|
|||
|
|
|||
|
Dirent = FsRtlAllocatePool( PagedPool,
|
|||
|
DirentsNeeded * sizeof(DIRENT) );
|
|||
|
|
|||
|
DirentFromPool = TRUE;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Bump up Dirent and DirentByteOffset
|
|||
|
//
|
|||
|
|
|||
|
ShortDirent = Dirent + DirentsNeeded - 1;
|
|||
|
ShortDirentByteOffset = DirentByteOffset +
|
|||
|
(DirentsNeeded - 1) * sizeof(DIRENT);
|
|||
|
|
|||
|
ASSERT( NT_SUCCESS( Iosb.Status ));
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Fill in the fields of the dirent, and mark the bcb dirty
|
|||
|
//
|
|||
|
|
|||
|
FatConstructDirent( IrpContext,
|
|||
|
ShortDirent,
|
|||
|
&ShortName,
|
|||
|
AllLowerComponent,
|
|||
|
AllLowerExtension,
|
|||
|
CreateLfn ? UnicodeName : NULL,
|
|||
|
(UCHAR)(FileAttributes | FAT_DIRENT_ATTR_DIRECTORY),
|
|||
|
TRUE,
|
|||
|
NULL );
|
|||
|
|
|||
|
//
|
|||
|
// If the dirent crossed pages, we have to do some real gross stuff.
|
|||
|
//
|
|||
|
|
|||
|
if (DirentFromPool) {
|
|||
|
|
|||
|
RtlCopyMemory( FirstPageDirent, Dirent, BytesInFirstPage );
|
|||
|
|
|||
|
RtlCopyMemory( SecondPageDirent,
|
|||
|
Dirent + DirentsInFirstPage,
|
|||
|
DirentsNeeded*sizeof(DIRENT) - BytesInFirstPage );
|
|||
|
|
|||
|
FatSetDirtyBcb( IrpContext, SecondPageBcb, Vcb );
|
|||
|
|
|||
|
ShortDirent = SecondPageDirent + (DirentsNeeded - DirentsInFirstPage) - 1;
|
|||
|
}
|
|||
|
|
|||
|
FatSetDirtyBcb( IrpContext, DirentBcb, Vcb );
|
|||
|
|
|||
|
//
|
|||
|
// Create a new dcb for the directory.
|
|||
|
//
|
|||
|
|
|||
|
Dcb = FatCreateDcb( IrpContext,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
DirentByteOffset,
|
|||
|
ShortDirentByteOffset,
|
|||
|
ShortDirent,
|
|||
|
CreateLfn ? UnicodeName : NULL );
|
|||
|
|
|||
|
//
|
|||
|
// Tentatively add the new Ea's,
|
|||
|
//
|
|||
|
|
|||
|
if (EaLength > 0) {
|
|||
|
|
|||
|
//
|
|||
|
// This returns false if we are trying to create a file
|
|||
|
// with Need Ea's and don't understand EA's.
|
|||
|
//
|
|||
|
|
|||
|
FatCreateEa( IrpContext,
|
|||
|
Dcb->Vcb,
|
|||
|
(PUCHAR) EaBuffer,
|
|||
|
EaLength,
|
|||
|
&Dcb->ShortName.Name.Oem,
|
|||
|
&EaHandle );
|
|||
|
}
|
|||
|
|
|||
|
ShortDirent->ExtendedAttributes = EaHandle;
|
|||
|
|
|||
|
//
|
|||
|
// After this point we cannot just simply mark the dirent deleted,
|
|||
|
// we have to deal with the directory file object.
|
|||
|
//
|
|||
|
|
|||
|
//
|
|||
|
// Make the dirent into a directory. Note that even if this call
|
|||
|
// raises because of disk space, the diectory file object has been
|
|||
|
// created.
|
|||
|
//
|
|||
|
|
|||
|
FatInitializeDirectoryDirent( IrpContext, Dcb, ShortDirent );
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers, and update
|
|||
|
// our reference counts. Note that this call cannot fail.
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserDirectoryOpen,
|
|||
|
Dcb,
|
|||
|
Ccb = FatCreateCcb( IrpContext ) );
|
|||
|
|
|||
|
//
|
|||
|
// Initialize the LongFileName right now so that FatNotify
|
|||
|
// below won't have to.
|
|||
|
//
|
|||
|
|
|||
|
FatSetFullNameInFcb( IrpContext, Dcb, UnicodeName );
|
|||
|
|
|||
|
//
|
|||
|
// We call the notify package to report that the
|
|||
|
// we added a file.
|
|||
|
//
|
|||
|
|
|||
|
FatNotifyReportChange( IrpContext,
|
|||
|
Vcb,
|
|||
|
Dcb,
|
|||
|
FILE_NOTIFY_CHANGE_DIR_NAME,
|
|||
|
FILE_ACTION_ADDED );
|
|||
|
|
|||
|
//
|
|||
|
// Setup our share access
|
|||
|
//
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Dcb->ShareAccess );
|
|||
|
|
|||
|
//
|
|||
|
// From this point on, nothing can raise.
|
|||
|
//
|
|||
|
|
|||
|
Dcb->UncleanCount += 1;
|
|||
|
Dcb->OpenCount += 1;
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
|
|||
|
if (DeleteOnClose) {
|
|||
|
|
|||
|
SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// And set our return status
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = FILE_CREATED;
|
|||
|
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatCreateNewDirectory );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if ( Dcb == NULL) {
|
|||
|
|
|||
|
ASSERT( (ParentDcb->Specific.Dcb.UnusedDirentVbo == 0xffffffff) ||
|
|||
|
RtlAreBitsSet( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
|
|||
|
DirentByteOffset / sizeof(DIRENT),
|
|||
|
DirentsNeeded ) );
|
|||
|
|
|||
|
RtlClearBits( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
|
|||
|
DirentByteOffset / sizeof(DIRENT),
|
|||
|
DirentsNeeded );
|
|||
|
|
|||
|
//
|
|||
|
// Mark the dirents deleted. The codes is complex because of
|
|||
|
// dealing with an LFN than crosses a page boundry.
|
|||
|
//
|
|||
|
|
|||
|
if (Dirent != NULL) {
|
|||
|
|
|||
|
ULONG i;
|
|||
|
|
|||
|
//
|
|||
|
// We failed before creating a directory file object.
|
|||
|
// We can just mark the dirent deleted and exit.
|
|||
|
//
|
|||
|
|
|||
|
for (i = 0; i < DirentsNeeded; i++) {
|
|||
|
|
|||
|
if (DirentFromPool == FALSE) {
|
|||
|
|
|||
|
//
|
|||
|
// Simple case.
|
|||
|
//
|
|||
|
|
|||
|
Dirent[i].FileName[0] = FAT_DIRENT_DELETED;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
//
|
|||
|
// If the second CcPreparePinWrite failed, we have
|
|||
|
// to stop early.
|
|||
|
//
|
|||
|
|
|||
|
if ((SecondPageBcb == NULL) &&
|
|||
|
(i == DirentsInFirstPage)) {
|
|||
|
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now conditionally update either page.
|
|||
|
//
|
|||
|
|
|||
|
if (i < DirentsInFirstPage) {
|
|||
|
|
|||
|
FirstPageDirent[i].FileName[0] = FAT_DIRENT_DELETED;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
SecondPageDirent[i - DirentsInFirstPage].FileName[0] = FAT_DIRENT_DELETED;
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
//
|
|||
|
// We have created the Dcb. If an error occurred while
|
|||
|
// creating the Ea's, there will be no directory file
|
|||
|
// object.
|
|||
|
//
|
|||
|
|
|||
|
PFILE_OBJECT DirectoryFileObject;
|
|||
|
|
|||
|
DirectoryFileObject = Dcb->Specific.Dcb.DirectoryFile;
|
|||
|
|
|||
|
FatTruncateFileAllocation( IrpContext, Dcb, 0);
|
|||
|
|
|||
|
if (DirectoryFileObject != NULL) {
|
|||
|
|
|||
|
FatSyncUninitializeCacheMap( IrpContext,
|
|||
|
DirectoryFileObject );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Remove the directory entry we made in the parent Dcb.
|
|||
|
//
|
|||
|
|
|||
|
FatDeleteDirent( IrpContext, Dcb, NULL, TRUE );
|
|||
|
|
|||
|
//
|
|||
|
// Finnaly, dereference the directory file object. This will
|
|||
|
// cause a close Irp to be processed, blowing away the Fcb.
|
|||
|
//
|
|||
|
|
|||
|
if (DirectoryFileObject != NULL) {
|
|||
|
|
|||
|
//
|
|||
|
// BUGBUG The following is a fix for the PDK
|
|||
|
// only. By making this an unopened stream file
|
|||
|
// we won't try to clean up our parent.
|
|||
|
//
|
|||
|
|
|||
|
Dcb->Specific.Dcb.DirectoryFileOpenCount -= 1;
|
|||
|
Dcb->Specific.Dcb.DirectoryFile = NULL;
|
|||
|
FatSetFileObject( DirectoryFileObject,
|
|||
|
UnopenedFileObject,
|
|||
|
NULL,
|
|||
|
NULL );
|
|||
|
|
|||
|
ObDereferenceObject( DirectoryFileObject );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// BUGBUG This is also a PDK fix. If the stream file
|
|||
|
// exists, this is would be done during the dereference
|
|||
|
// file object operation. Otherwise we have to remove
|
|||
|
// the Dcb and check if we should remove the parent.
|
|||
|
// For now we will just leave the parent lying around.
|
|||
|
//
|
|||
|
|
|||
|
FatDeleteFcb( IrpContext, Dcb );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Finally (no pun intended), we always have to delete the Ccb
|
|||
|
// if we created one.
|
|||
|
//
|
|||
|
|
|||
|
if ( Ccb != NULL ) {
|
|||
|
|
|||
|
FatDeleteCcb( IrpContext, Ccb );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
|
|||
|
if (DirentFromPool) {
|
|||
|
|
|||
|
ExFreePool( Dirent );
|
|||
|
FatUnpinBcb( IrpContext, SecondPageBcb );
|
|||
|
}
|
|||
|
DebugTrace(-1, Dbg, "FatCreateNewDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
UNREFERENCED_PARAMETER( EaBuffer );
|
|||
|
UNREFERENCED_PARAMETER( EaLength );
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatCreateNewFile (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PVCB Vcb,
|
|||
|
IN PDCB ParentDcb,
|
|||
|
IN POEM_STRING OemName,
|
|||
|
IN PUNICODE_STRING UnicodeName,
|
|||
|
IN ACCESS_MASK DesiredAccess,
|
|||
|
IN USHORT ShareAccess,
|
|||
|
IN ULONG AllocationSize,
|
|||
|
IN PFILE_FULL_EA_INFORMATION EaBuffer,
|
|||
|
IN ULONG EaLength,
|
|||
|
IN UCHAR FileAttributes,
|
|||
|
IN PUNICODE_STRING LfnBuffer,
|
|||
|
IN BOOLEAN IsPagingFile,
|
|||
|
IN BOOLEAN NoEaKnowledge,
|
|||
|
IN BOOLEAN DeleteOnClose,
|
|||
|
IN BOOLEAN TemporaryFile
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine creates a new file. The file has already been verified
|
|||
|
not to exist yet.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies the file object for the newly created file
|
|||
|
|
|||
|
Vcb - Supplies the Vcb denote the volume to contain the new file
|
|||
|
|
|||
|
ParentDcb - Supplies the parent directory containg the newly created
|
|||
|
File
|
|||
|
|
|||
|
OemName - Supplies the Oem name for the newly created file. It may
|
|||
|
or maynot be 8.3 complient, but will be upcased.
|
|||
|
|
|||
|
UnicodeName - Supplies the Unicode name for the newly created file.
|
|||
|
It may or maynot be 8.3 complient. This name contains the original
|
|||
|
case information.
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access of the caller
|
|||
|
|
|||
|
ShareAccess - Supplies the shared access of the caller
|
|||
|
|
|||
|
AllocationSize - Supplies the initial allocation size for the file
|
|||
|
|
|||
|
EaBuffer - Supplies the Ea set for the newly created file
|
|||
|
|
|||
|
EaLength - Supplies the length, in bytes, of EaBuffer
|
|||
|
|
|||
|
FileAttributes - Supplies the file attributes for the newly created
|
|||
|
file
|
|||
|
|
|||
|
LfnBuffer - A MAX_LFN sized buffer for directory searching
|
|||
|
|
|||
|
IsPagingFile - Indicates if this is the paging file being created
|
|||
|
|
|||
|
NoEaKnowledge - This opener doesn't understand Ea's and we fail this
|
|||
|
open if the file has NeedEa's.
|
|||
|
|
|||
|
DeleteOnClose - The caller wants the file gone when the handle is closed
|
|||
|
|
|||
|
TemporaryFile - Signals the lazywriter to not write dirty data unless
|
|||
|
absolutely has to.
|
|||
|
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
|
|||
|
PFCB Fcb;
|
|||
|
|
|||
|
PDIRENT Dirent = NULL;
|
|||
|
PBCB DirentBcb = NULL;
|
|||
|
ULONG DirentsNeeded;
|
|||
|
ULONG DirentByteOffset;
|
|||
|
|
|||
|
PDIRENT ShortDirent;
|
|||
|
ULONG ShortDirentByteOffset;
|
|||
|
|
|||
|
USHORT EaHandle;
|
|||
|
|
|||
|
BOOLEAN AllLowerComponent;
|
|||
|
BOOLEAN AllLowerExtension;
|
|||
|
BOOLEAN CreateLfn;
|
|||
|
|
|||
|
ULONG BytesInFirstPage;
|
|||
|
ULONG DirentsInFirstPage;
|
|||
|
PDIRENT FirstPageDirent;
|
|||
|
|
|||
|
PBCB SecondPageBcb = NULL;
|
|||
|
ULONG SecondPageOffset;
|
|||
|
PDIRENT SecondPageDirent;
|
|||
|
|
|||
|
BOOLEAN DirentFromPool = FALSE;
|
|||
|
|
|||
|
OEM_STRING ShortName;
|
|||
|
UCHAR ShortNameBuffer[12];
|
|||
|
|
|||
|
UNICODE_STRING UniTunneledShortName;
|
|||
|
WCHAR UniTunneledShortNameBuffer[12];
|
|||
|
UNICODE_STRING UniTunneledLongName;
|
|||
|
WCHAR UniTunneledLongNameBuffer[26];
|
|||
|
LARGE_INTEGER TunneledCreationTime;
|
|||
|
ULONG TunneledDataSize;
|
|||
|
BOOLEAN HaveTunneledInformation;
|
|||
|
BOOLEAN UsingTunneledLfn = FALSE;
|
|||
|
|
|||
|
PUNICODE_STRING RealUnicodeName;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
PDIRENT UnwindDirent = NULL;
|
|||
|
PFCB UnwindFcb = NULL;
|
|||
|
BOOLEAN UnwindAllocation = FALSE;
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
BOOLEAN UnwindCounts = 0;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatCreateNewFile...\n", 0);
|
|||
|
|
|||
|
ShortName.Length = 0;
|
|||
|
ShortName.MaximumLength = sizeof(ShortNameBuffer);
|
|||
|
ShortName.Buffer = &ShortNameBuffer[0];
|
|||
|
|
|||
|
UniTunneledShortName.Length = 0;
|
|||
|
UniTunneledShortName.MaximumLength = sizeof(UniTunneledShortNameBuffer);
|
|||
|
UniTunneledShortName.Buffer = &UniTunneledShortNameBuffer[0];
|
|||
|
|
|||
|
UniTunneledLongName.Length = 0;
|
|||
|
UniTunneledLongName.MaximumLength = sizeof(UniTunneledLongNameBuffer);
|
|||
|
UniTunneledLongName.Buffer = &UniTunneledLongNameBuffer[0];
|
|||
|
|
|||
|
DirentBcb = NULL;
|
|||
|
EaHandle = 0;
|
|||
|
|
|||
|
//
|
|||
|
// We fail this operation if the caller doesn't understand Ea's.
|
|||
|
//
|
|||
|
|
|||
|
if (NoEaKnowledge
|
|||
|
&& EaLength > 0) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCreateNewFile -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// DeleteOnClose and ReadOnly are not compatible.
|
|||
|
//
|
|||
|
|
|||
|
if (DeleteOnClose && FlagOn(FileAttributes, FAT_DIRENT_ATTR_READ_ONLY)) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_CANNOT_DELETE;
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Look in the tunnel cache for names and timestamps to restore
|
|||
|
//
|
|||
|
|
|||
|
TunneledDataSize = sizeof(LARGE_INTEGER);
|
|||
|
HaveTunneledInformation = FsRtlFindInTunnelCache( &Vcb->Tunnel,
|
|||
|
FatDirectoryKey(ParentDcb),
|
|||
|
UnicodeName,
|
|||
|
&UniTunneledShortName,
|
|||
|
&UniTunneledLongName,
|
|||
|
&TunneledDataSize,
|
|||
|
&TunneledCreationTime );
|
|||
|
ASSERT(TunneledDataSize == sizeof(LARGE_INTEGER));
|
|||
|
|
|||
|
//
|
|||
|
// Now get the names that we will be using.
|
|||
|
//
|
|||
|
|
|||
|
FatSelectNames( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
OemName,
|
|||
|
UnicodeName,
|
|||
|
&ShortName,
|
|||
|
(HaveTunneledInformation? &UniTunneledShortName : NULL),
|
|||
|
&AllLowerComponent,
|
|||
|
&AllLowerExtension,
|
|||
|
&CreateLfn );
|
|||
|
|
|||
|
//
|
|||
|
// If we are not in Chicago mode, ignore the magic bits.
|
|||
|
//
|
|||
|
|
|||
|
RealUnicodeName = UnicodeName;
|
|||
|
|
|||
|
if (!FatData.ChicagoMode) {
|
|||
|
|
|||
|
AllLowerComponent = FALSE;
|
|||
|
AllLowerExtension = FALSE;
|
|||
|
CreateLfn = FALSE;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
//
|
|||
|
// If the Unicode name was legal for a short name and we got
|
|||
|
// a tunneling hit which had a long name associated which is
|
|||
|
// avaliable for use, use it.
|
|||
|
//
|
|||
|
|
|||
|
if (!CreateLfn &&
|
|||
|
UniTunneledLongName.Length &&
|
|||
|
!FatLfnDirentExists(IrpContext, ParentDcb, &UniTunneledLongName, LfnBuffer)) {
|
|||
|
|
|||
|
UsingTunneledLfn = TRUE;
|
|||
|
CreateLfn = TRUE;
|
|||
|
|
|||
|
RealUnicodeName = &UniTunneledLongName;
|
|||
|
|
|||
|
//
|
|||
|
// Short names are always upcase if an LFN exists
|
|||
|
//
|
|||
|
|
|||
|
AllLowerComponent = FALSE;
|
|||
|
AllLowerExtension = FALSE;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Create/allocate a new dirent
|
|||
|
//
|
|||
|
|
|||
|
DirentsNeeded = CreateLfn ? FAT_LFN_DIRENTS_NEEDED(RealUnicodeName) + 1 : 1;
|
|||
|
|
|||
|
DirentByteOffset = FatCreateNewDirent( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
DirentsNeeded );
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
FatPrepareWriteDirectoryFile( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
DirentByteOffset,
|
|||
|
sizeof(DIRENT),
|
|||
|
&DirentBcb,
|
|||
|
&Dirent,
|
|||
|
FALSE,
|
|||
|
&Iosb.Status );
|
|||
|
|
|||
|
ASSERT( NT_SUCCESS( Iosb.Status ) );
|
|||
|
|
|||
|
UnwindDirent = Dirent;
|
|||
|
|
|||
|
//
|
|||
|
// Deal with the special case of an LFN + Dirent structure crossing
|
|||
|
// a page boundry.
|
|||
|
//
|
|||
|
|
|||
|
if ((DirentByteOffset / PAGE_SIZE) !=
|
|||
|
((DirentByteOffset + (DirentsNeeded - 1) * sizeof(DIRENT)) / PAGE_SIZE)) {
|
|||
|
|
|||
|
SecondPageBcb;
|
|||
|
SecondPageOffset;
|
|||
|
SecondPageDirent;
|
|||
|
|
|||
|
SecondPageOffset = (DirentByteOffset & ~(PAGE_SIZE - 1)) + PAGE_SIZE;
|
|||
|
|
|||
|
BytesInFirstPage = SecondPageOffset - DirentByteOffset;
|
|||
|
|
|||
|
DirentsInFirstPage = BytesInFirstPage / sizeof(DIRENT);
|
|||
|
|
|||
|
FatPrepareWriteDirectoryFile( IrpContext,
|
|||
|
ParentDcb,
|
|||
|
SecondPageOffset,
|
|||
|
sizeof(DIRENT),
|
|||
|
&SecondPageBcb,
|
|||
|
&SecondPageDirent,
|
|||
|
FALSE,
|
|||
|
&Iosb.Status );
|
|||
|
|
|||
|
ASSERT( NT_SUCCESS( Iosb.Status ) );
|
|||
|
|
|||
|
FirstPageDirent = Dirent;
|
|||
|
|
|||
|
Dirent = FsRtlAllocatePool( PagedPool,
|
|||
|
DirentsNeeded * sizeof(DIRENT) );
|
|||
|
|
|||
|
DirentFromPool = TRUE;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Bump up Dirent and DirentByteOffset
|
|||
|
//
|
|||
|
|
|||
|
ShortDirent = Dirent + DirentsNeeded - 1;
|
|||
|
ShortDirentByteOffset = DirentByteOffset +
|
|||
|
(DirentsNeeded - 1) * sizeof(DIRENT);
|
|||
|
|
|||
|
ASSERT( NT_SUCCESS( Iosb.Status ));
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Fill in the fields of the dirent, and mark the bcb dirty
|
|||
|
//
|
|||
|
|
|||
|
FatConstructDirent( IrpContext,
|
|||
|
ShortDirent,
|
|||
|
&ShortName,
|
|||
|
AllLowerComponent,
|
|||
|
AllLowerExtension,
|
|||
|
CreateLfn ? RealUnicodeName : NULL,
|
|||
|
(UCHAR)(FileAttributes | FILE_ATTRIBUTE_ARCHIVE),
|
|||
|
TRUE,
|
|||
|
(HaveTunneledInformation ? &TunneledCreationTime : NULL) );
|
|||
|
|
|||
|
//
|
|||
|
// If the dirent crossed pages, we have to do some real gross stuff.
|
|||
|
//
|
|||
|
|
|||
|
if (DirentFromPool) {
|
|||
|
|
|||
|
RtlCopyMemory( FirstPageDirent, Dirent, BytesInFirstPage );
|
|||
|
|
|||
|
RtlCopyMemory( SecondPageDirent,
|
|||
|
Dirent + DirentsInFirstPage,
|
|||
|
DirentsNeeded*sizeof(DIRENT) - BytesInFirstPage );
|
|||
|
|
|||
|
FatSetDirtyBcb( IrpContext, SecondPageBcb, Vcb );
|
|||
|
|
|||
|
ShortDirent = SecondPageDirent + (DirentsNeeded - DirentsInFirstPage) - 1;
|
|||
|
}
|
|||
|
|
|||
|
FatSetDirtyBcb( IrpContext, DirentBcb, Vcb );
|
|||
|
|
|||
|
//
|
|||
|
// Create a new Fcb for the file. Once the Fcb is created we
|
|||
|
// will not need to unwind dirent because delete dirent will
|
|||
|
// now do the work.
|
|||
|
//
|
|||
|
|
|||
|
Fcb = UnwindFcb = FatCreateFcb( IrpContext,
|
|||
|
Vcb,
|
|||
|
ParentDcb,
|
|||
|
DirentByteOffset,
|
|||
|
ShortDirentByteOffset,
|
|||
|
ShortDirent,
|
|||
|
CreateLfn ? RealUnicodeName : NULL,
|
|||
|
IsPagingFile );
|
|||
|
UnwindDirent = NULL;
|
|||
|
|
|||
|
//
|
|||
|
// If this is a temporary file, note it in the FcbState
|
|||
|
//
|
|||
|
|
|||
|
if (TemporaryFile) {
|
|||
|
|
|||
|
SetFlag( Fcb->FcbState, FCB_STATE_TEMPORARY );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Add some initial file allocation
|
|||
|
//
|
|||
|
|
|||
|
FatAddFileAllocation( IrpContext, Fcb, FileObject, AllocationSize );
|
|||
|
UnwindAllocation = TRUE;
|
|||
|
|
|||
|
Fcb->FcbState |= FCB_STATE_TRUNCATE_ON_CLOSE;
|
|||
|
|
|||
|
//
|
|||
|
// Tentatively add the new Ea's
|
|||
|
//
|
|||
|
|
|||
|
if ( EaLength > 0 ) {
|
|||
|
|
|||
|
FatCreateEa( IrpContext,
|
|||
|
Fcb->Vcb,
|
|||
|
(PUCHAR) EaBuffer,
|
|||
|
EaLength,
|
|||
|
&Fcb->ShortName.Name.Oem,
|
|||
|
&EaHandle );
|
|||
|
}
|
|||
|
|
|||
|
ShortDirent->ExtendedAttributes = EaHandle;
|
|||
|
|
|||
|
//
|
|||
|
// Initialize the LongFileName right now so that FatNotify
|
|||
|
// below won't have to.
|
|||
|
//
|
|||
|
|
|||
|
FatSetFullNameInFcb( IrpContext, Fcb, RealUnicodeName );
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers, and update
|
|||
|
// our reference counts
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserFileOpen,
|
|||
|
Fcb,
|
|||
|
UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
FileObject->SectionObjectPointer = &Fcb->NonPaged->SectionObjectPointers;
|
|||
|
|
|||
|
//
|
|||
|
// We call the notify package to report that the
|
|||
|
// we added a file.
|
|||
|
//
|
|||
|
|
|||
|
FatNotifyReportChange( IrpContext,
|
|||
|
Vcb,
|
|||
|
Fcb,
|
|||
|
FILE_NOTIFY_CHANGE_FILE_NAME,
|
|||
|
FILE_ACTION_ADDED );
|
|||
|
|
|||
|
//
|
|||
|
// Setup our share access
|
|||
|
//
|
|||
|
|
|||
|
IoSetShareAccess( DesiredAccess,
|
|||
|
ShareAccess,
|
|||
|
FileObject,
|
|||
|
&Fcb->ShareAccess );
|
|||
|
|
|||
|
Fcb->UncleanCount += 1;
|
|||
|
Fcb->OpenCount += 1;
|
|||
|
if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
|
|||
|
Fcb->NonCachedUncleanCount += 1;
|
|||
|
}
|
|||
|
Vcb->OpenFileCount += 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
|
|||
|
UnwindCounts = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// And set our return status
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
Iosb.Information = FILE_CREATED;
|
|||
|
|
|||
|
//try_exit: NOTHING;
|
|||
|
|
|||
|
if ( NT_SUCCESS(Iosb.Status) ) {
|
|||
|
|
|||
|
//
|
|||
|
// Mark the DeleteOnClose bit if the operation was successful.
|
|||
|
//
|
|||
|
|
|||
|
if ( DeleteOnClose ) {
|
|||
|
|
|||
|
SetFlag( UnwindCcb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Mark the OpenedByShortName bit if the operation was successful.
|
|||
|
// If we created an Lfn, we have some sort of generated short name
|
|||
|
// and thus don't consider ourselves to have opened it - though we
|
|||
|
// may have had a case mix Lfn "Foo.bar" and generated "FOO.BAR"
|
|||
|
//
|
|||
|
// Unless, of course, we wanted to create a short name and hit an
|
|||
|
// associated Lfn in the tunnel cache
|
|||
|
//
|
|||
|
|
|||
|
if ( !CreateLfn && !UsingTunneledLfn ) {
|
|||
|
|
|||
|
SetFlag( UnwindCcb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatCreateNewFile );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindFcb == NULL) {
|
|||
|
|
|||
|
ASSERT( (ParentDcb->Specific.Dcb.UnusedDirentVbo == 0xffffffff) ||
|
|||
|
RtlAreBitsSet( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
|
|||
|
DirentByteOffset / sizeof(DIRENT),
|
|||
|
DirentsNeeded ) );
|
|||
|
|
|||
|
RtlClearBits( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
|
|||
|
DirentByteOffset / sizeof(DIRENT),
|
|||
|
DirentsNeeded );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Mark the dirents deleted. The codes is complex because of
|
|||
|
// dealing with an LFN than crosses a page boundry.
|
|||
|
//
|
|||
|
|
|||
|
if (UnwindDirent != NULL) {
|
|||
|
|
|||
|
ULONG i;
|
|||
|
|
|||
|
for (i = 0; i < DirentsNeeded; i++) {
|
|||
|
|
|||
|
if (DirentFromPool == FALSE) {
|
|||
|
|
|||
|
//
|
|||
|
// Simple case.
|
|||
|
//
|
|||
|
|
|||
|
Dirent[i].FileName[0] = FAT_DIRENT_DELETED;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
//
|
|||
|
// If the second CcPreparePinWrite failed, we have
|
|||
|
// to stop early.
|
|||
|
//
|
|||
|
|
|||
|
if ((SecondPageBcb == NULL) &&
|
|||
|
(i == DirentsInFirstPage)) {
|
|||
|
|
|||
|
break;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now conditionally update either page.
|
|||
|
//
|
|||
|
|
|||
|
if (i < DirentsInFirstPage) {
|
|||
|
|
|||
|
FirstPageDirent[i].FileName[0] = FAT_DIRENT_DELETED;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
SecondPageDirent[i - DirentsInFirstPage].FileName[0] = FAT_DIRENT_DELETED;
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
if (UnwindAllocation) { FatTruncateFileAllocation( IrpContext, Fcb, 0 ); }
|
|||
|
if (UnwindCounts) {
|
|||
|
Fcb->UncleanCount -= 1;
|
|||
|
Fcb->OpenCount -= 1;
|
|||
|
if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
|
|||
|
Fcb->NonCachedUncleanCount -= 1;
|
|||
|
}
|
|||
|
Vcb->OpenFileCount -= 1;
|
|||
|
if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
|
|||
|
}
|
|||
|
if (UnwindFcb != NULL) { FatDeleteDirent( IrpContext, UnwindFcb, NULL, TRUE );
|
|||
|
FatDeleteFcb( IrpContext, UnwindFcb ); }
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
}
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
|
|||
|
if (DirentFromPool) {
|
|||
|
|
|||
|
ExFreePool( Dirent );
|
|||
|
FatUnpinBcb( IrpContext, SecondPageBcb );
|
|||
|
}
|
|||
|
|
|||
|
if (UniTunneledLongName.Buffer != UniTunneledLongNameBuffer) {
|
|||
|
|
|||
|
//
|
|||
|
// Tunneling package grew the buffer from pool
|
|||
|
//
|
|||
|
|
|||
|
ExFreePool( UniTunneledLongName.Buffer );
|
|||
|
}
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatCreateNewFile -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
IO_STATUS_BLOCK
|
|||
|
FatSupersedeOrOverwriteFile (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFILE_OBJECT FileObject,
|
|||
|
IN PFCB Fcb,
|
|||
|
IN ACCESS_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 NoEaKnowledge
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine performs a file supersede or overwrite operation.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
FileObject - Supplies a pointer to the file object
|
|||
|
|
|||
|
Fcb - Supplies a pointer to the Fcb
|
|||
|
|
|||
|
DesiredAccess - Supplies the desired access
|
|||
|
|
|||
|
ShareAccess - Supplies the desired share access
|
|||
|
|
|||
|
AllocationSize - Supplies an initial allocation size
|
|||
|
|
|||
|
EaBuffer - Supplies the Ea set for the superseded/overwritten file
|
|||
|
|
|||
|
EaLength - Supplies the length, in bytes, of EaBuffer
|
|||
|
|
|||
|
FileAttributes - Supplies the supersede/overwrite file attributes
|
|||
|
|
|||
|
CreateDisposition - Supplies the create disposition for the file
|
|||
|
It must be either supersede, overwrite, or overwrite if.
|
|||
|
|
|||
|
NoEaKnowledge - This opener doesn't understand Ea's and we fail this
|
|||
|
open if the file has NeedEa's.
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
IO_STATUS_BLOCK - Returns the completion status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
|
|||
|
PDIRENT Dirent;
|
|||
|
PBCB DirentBcb;
|
|||
|
|
|||
|
USHORT EaHandle = 0;
|
|||
|
BOOLEAN EaChange = FALSE;
|
|||
|
|
|||
|
PCCB Ccb;
|
|||
|
|
|||
|
ULONG NotifyFilter;
|
|||
|
|
|||
|
//
|
|||
|
// The following variables are for abnormal termination
|
|||
|
//
|
|||
|
|
|||
|
PCCB UnwindCcb = NULL;
|
|||
|
USHORT UnwindEa = 0;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatSupersedeOrOverwriteFile...\n", 0);
|
|||
|
|
|||
|
DirentBcb = NULL;
|
|||
|
|
|||
|
//
|
|||
|
// We fail this operation if the caller doesn't understand Ea's.
|
|||
|
//
|
|||
|
|
|||
|
if (NoEaKnowledge
|
|||
|
&& EaLength > 0) {
|
|||
|
|
|||
|
Iosb.Status = STATUS_ACCESS_DENIED;
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatSupersedeOrOverwriteFile -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// Before we actually truncate, check to see if the purge
|
|||
|
// is going to fail.
|
|||
|
//
|
|||
|
|
|||
|
if (!MmCanFileBeTruncated( &Fcb->NonPaged->SectionObjectPointers,
|
|||
|
&FatLargeZero )) {
|
|||
|
|
|||
|
try_return( Iosb.Status = STATUS_USER_MAPPED_FILE );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Setup the context and section object pointers, and update
|
|||
|
// our reference counts
|
|||
|
//
|
|||
|
|
|||
|
FatSetFileObject( FileObject,
|
|||
|
UserFileOpen,
|
|||
|
Fcb,
|
|||
|
Ccb = UnwindCcb = FatCreateCcb( IrpContext ));
|
|||
|
|
|||
|
FileObject->SectionObjectPointer = &Fcb->NonPaged->SectionObjectPointers;
|
|||
|
|
|||
|
//
|
|||
|
// Since this is an supersede/overwrite, purge the section so
|
|||
|
// that mappers will see zeros. We set the CREATE_IN_PROGRESS flag
|
|||
|
// to prevent the Fcb from going away out from underneath us.
|
|||
|
//
|
|||
|
|
|||
|
SetFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
|
|||
|
|
|||
|
CcPurgeCacheSection( &Fcb->NonPaged->SectionObjectPointers, NULL, 0, FALSE );
|
|||
|
|
|||
|
//
|
|||
|
// Tentatively add the new Ea's
|
|||
|
//
|
|||
|
|
|||
|
if (EaLength > 0) {
|
|||
|
|
|||
|
FatCreateEa( IrpContext,
|
|||
|
Fcb->Vcb,
|
|||
|
(PUCHAR) EaBuffer,
|
|||
|
EaLength,
|
|||
|
&Fcb->ShortName.Name.Oem,
|
|||
|
&EaHandle );
|
|||
|
|
|||
|
UnwindEa = EaHandle;
|
|||
|
EaChange = TRUE;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now set the new allocation size, we do that by first
|
|||
|
// zeroing out the current file size. Then we truncate and
|
|||
|
// allocate up to the new allocation size
|
|||
|
//
|
|||
|
|
|||
|
(VOID)ExAcquireResourceExclusive( Fcb->Header.PagingIoResource,
|
|||
|
TRUE );
|
|||
|
|
|||
|
Fcb->Header.FileSize.LowPart = 0;
|
|||
|
Fcb->Header.ValidDataLength.LowPart = 0;
|
|||
|
Fcb->ValidDataToDisk = 0;
|
|||
|
|
|||
|
ExReleaseResource( Fcb->Header.PagingIoResource );
|
|||
|
|
|||
|
//
|
|||
|
// Tell the cache manager the size went to zero
|
|||
|
// This call is unconditional, because MM always wants to know.
|
|||
|
//
|
|||
|
|
|||
|
CcSetFileSizes( FileObject,
|
|||
|
(PCC_FILE_SIZES)&Fcb->Header.AllocationSize );
|
|||
|
|
|||
|
FatTruncateFileAllocation( IrpContext, Fcb, AllocationSize );
|
|||
|
FatAddFileAllocation( IrpContext, Fcb, FileObject, AllocationSize );
|
|||
|
|
|||
|
Fcb->FcbState |= FCB_STATE_TRUNCATE_ON_CLOSE;
|
|||
|
|
|||
|
//
|
|||
|
// Modify the attributes and time of the file, by first reading
|
|||
|
// in the dirent for the file and then updating its attributes
|
|||
|
// and time fields. Note that for supersede we replace the file
|
|||
|
// attributes as opposed to adding to them.
|
|||
|
//
|
|||
|
|
|||
|
FatGetDirentFromFcbOrDcb( IrpContext,
|
|||
|
Fcb,
|
|||
|
&Dirent,
|
|||
|
&DirentBcb );
|
|||
|
|
|||
|
//
|
|||
|
// Update the appropriate dirent fields, and the fcb fields
|
|||
|
//
|
|||
|
|
|||
|
Dirent->FileSize = 0;
|
|||
|
|
|||
|
FileAttributes |= FILE_ATTRIBUTE_ARCHIVE;
|
|||
|
|
|||
|
if (CreateDisposition == FILE_SUPERSEDE) {
|
|||
|
|
|||
|
Dirent->Attributes = FileAttributes;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
Dirent->Attributes |= FileAttributes;
|
|||
|
}
|
|||
|
|
|||
|
Fcb->DirentFatFlags = Dirent->Attributes;
|
|||
|
|
|||
|
KeQuerySystemTime( &Fcb->LastWriteTime );
|
|||
|
|
|||
|
(VOID)FatNtTimeToFatTime( IrpContext,
|
|||
|
&Fcb->LastWriteTime,
|
|||
|
TRUE,
|
|||
|
&Dirent->LastWriteTime,
|
|||
|
NULL );
|
|||
|
|
|||
|
if (FatData.ChicagoMode) {
|
|||
|
|
|||
|
Dirent->LastAccessDate = Dirent->LastWriteTime.Date;
|
|||
|
}
|
|||
|
|
|||
|
NotifyFilter = FILE_NOTIFY_CHANGE_LAST_WRITE
|
|||
|
| FILE_NOTIFY_CHANGE_ATTRIBUTES
|
|||
|
| FILE_NOTIFY_CHANGE_SIZE;
|
|||
|
|
|||
|
//
|
|||
|
// And now delete the previous Ea set if there was one.
|
|||
|
//
|
|||
|
|
|||
|
if (Dirent->ExtendedAttributes != 0) {
|
|||
|
|
|||
|
//
|
|||
|
// **** SDK fix, we won't fail this if there is
|
|||
|
// an error in the Ea's, we'll just leave
|
|||
|
// the orphaned Ea's in the file.
|
|||
|
//
|
|||
|
|
|||
|
EaChange = TRUE;
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
FatDeleteEa( IrpContext,
|
|||
|
Fcb->Vcb,
|
|||
|
Dirent->ExtendedAttributes,
|
|||
|
&Fcb->ShortName.Name.Oem );
|
|||
|
|
|||
|
} except( EXCEPTION_EXECUTE_HANDLER ) {
|
|||
|
|
|||
|
NOTHING;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Update the extended attributes handle in the dirent.
|
|||
|
//
|
|||
|
|
|||
|
if (EaChange) {
|
|||
|
|
|||
|
Dirent->ExtendedAttributes = EaHandle;
|
|||
|
|
|||
|
NotifyFilter |= FILE_NOTIFY_CHANGE_EA;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Now update the dirent to the new ea handle and set the bcb dirty
|
|||
|
// Once we do this we can no longer back out the Ea
|
|||
|
//
|
|||
|
|
|||
|
FatSetDirtyBcb( IrpContext, DirentBcb, Fcb->Vcb );
|
|||
|
UnwindEa = 0;
|
|||
|
|
|||
|
//
|
|||
|
// Indicate that the Eas for this file have changed.
|
|||
|
//
|
|||
|
|
|||
|
Ccb->EaModificationCount += Fcb->EaModificationCount;
|
|||
|
|
|||
|
//
|
|||
|
// Check to see if we need to notify outstanding Irps for full
|
|||
|
// changes only (i.e., we haven't added, deleted, or renamed the file).
|
|||
|
//
|
|||
|
|
|||
|
FatNotifyReportChange( IrpContext,
|
|||
|
Fcb->Vcb,
|
|||
|
Fcb,
|
|||
|
NotifyFilter,
|
|||
|
FILE_ACTION_MODIFIED );
|
|||
|
|
|||
|
//
|
|||
|
// And set our status to success
|
|||
|
//
|
|||
|
|
|||
|
Iosb.Status = STATUS_SUCCESS;
|
|||
|
|
|||
|
if (CreateDisposition == FILE_SUPERSEDE) {
|
|||
|
|
|||
|
Iosb.Information = FILE_SUPERSEDED;
|
|||
|
|
|||
|
} else {
|
|||
|
|
|||
|
Iosb.Information = FILE_OVERWRITTEN;
|
|||
|
}
|
|||
|
|
|||
|
try_exit: NOTHING;
|
|||
|
} finally {
|
|||
|
|
|||
|
DebugUnwind( FatSupersedeOfOverwriteFile );
|
|||
|
|
|||
|
//
|
|||
|
// If this is an abnormal termination then undo our work.
|
|||
|
//
|
|||
|
|
|||
|
if (AbnormalTermination()) {
|
|||
|
|
|||
|
if (UnwindEa != 0) { FatDeleteEa( IrpContext, Fcb->Vcb, UnwindEa, &Fcb->ShortName.Name.Oem ); }
|
|||
|
if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, UnwindCcb ); }
|
|||
|
}
|
|||
|
|
|||
|
FatUnpinBcb( IrpContext, DirentBcb );
|
|||
|
|
|||
|
ClearFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatSupersedeOrOverwriteFile -> Iosb.Status = %08lx\n", Iosb.Status);
|
|||
|
}
|
|||
|
|
|||
|
UNREFERENCED_PARAMETER( ShareAccess );
|
|||
|
UNREFERENCED_PARAMETER( DesiredAccess );
|
|||
|
|
|||
|
return Iosb;
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Internal support routine
|
|||
|
//
|
|||
|
|
|||
|
VOID
|
|||
|
FatSetFullNameInFcb(
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PFCB Fcb,
|
|||
|
IN PUNICODE_STRING FinalName
|
|||
|
)
|
|||
|
{
|
|||
|
if (NodeType(Fcb->ParentDcb) == FAT_NTC_ROOT_DCB) {
|
|||
|
|
|||
|
Fcb->FullFileName.Length =
|
|||
|
Fcb->FullFileName.MaximumLength = sizeof(WCHAR) + FinalName->Length;
|
|||
|
|
|||
|
Fcb->FullFileName.Buffer = FsRtlAllocatePool( PagedPool,
|
|||
|
Fcb->FullFileName.Length );
|
|||
|
|
|||
|
Fcb->FullFileName.Buffer[0] = L'\\';
|
|||
|
|
|||
|
RtlCopyMemory( &Fcb->FullFileName.Buffer[1],
|
|||
|
&FinalName->Buffer[0],
|
|||
|
FinalName->Length );
|
|||
|
} else {
|
|||
|
|
|||
|
PUNICODE_STRING Prefix;
|
|||
|
|
|||
|
Prefix = &Fcb->ParentDcb->FullFileName;
|
|||
|
|
|||
|
Fcb->FullFileName.Length =
|
|||
|
Fcb->FullFileName.MaximumLength =
|
|||
|
Prefix->Length + sizeof(WCHAR) + FinalName->Length;
|
|||
|
|
|||
|
Fcb->FullFileName.Buffer = FsRtlAllocatePool( PagedPool,
|
|||
|
Fcb->FullFileName.Length );
|
|||
|
|
|||
|
RtlCopyMemory( &Fcb->FullFileName.Buffer[0],
|
|||
|
&Prefix->Buffer[0],
|
|||
|
Prefix->Length );
|
|||
|
|
|||
|
Fcb->FullFileName.Buffer[Prefix->Length / sizeof(WCHAR)] = L'\\';
|
|||
|
|
|||
|
RtlCopyMemory( &Fcb->FullFileName.Buffer[(Prefix->Length / sizeof(WCHAR)) + 1],
|
|||
|
&FinalName->Buffer[0],
|
|||
|
FinalName->Length );
|
|||
|
}
|
|||
|
}
|