1510 lines
34 KiB
C
1510 lines
34 KiB
C
/*++
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Copyright (c) 1989-2000 Microsoft Corporation
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Module Name:
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FileInfo.c
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Abstract:
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This module implements the File Information routines for Cdfs called by
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the Fsd/Fsp dispatch drivers.
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// @@BEGIN_DDKSPLIT
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Author:
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Brian Andrew [BrianAn] 01-July-1995
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Revision History:
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// @@END_DDKSPLIT
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--*/
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#include "CdProcs.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 (CDFS_BUG_CHECK_FILEINFO)
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//
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// Local support routines
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//
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VOID
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CdQueryBasicInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFCB Fcb,
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IN OUT PFILE_BASIC_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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VOID
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CdQueryStandardInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFCB Fcb,
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IN OUT PFILE_STANDARD_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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VOID
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CdQueryInternalInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFCB Fcb,
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IN OUT PFILE_INTERNAL_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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VOID
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CdQueryEaInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFCB Fcb,
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IN OUT PFILE_EA_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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VOID
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CdQueryPositionInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN OUT PFILE_POSITION_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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NTSTATUS
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CdQueryNameInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFILE_OBJECT FileObject,
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IN OUT PFILE_NAME_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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NTSTATUS
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CdQueryAlternateNameInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFCB Fcb,
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IN PCCB Ccb,
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IN OUT PFILE_NAME_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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VOID
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CdQueryNetworkInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PFCB Fcb,
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IN OUT PFILE_NETWORK_OPEN_INFORMATION Buffer,
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IN OUT PULONG Length
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, CdCommonQueryInfo)
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#pragma alloc_text(PAGE, CdCommonSetInfo)
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#pragma alloc_text(PAGE, CdFastQueryBasicInfo)
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#pragma alloc_text(PAGE, CdFastQueryStdInfo)
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#pragma alloc_text(PAGE, CdFastQueryNetworkInfo)
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#pragma alloc_text(PAGE, CdQueryAlternateNameInfo)
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#pragma alloc_text(PAGE, CdQueryBasicInfo)
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#pragma alloc_text(PAGE, CdQueryEaInfo)
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#pragma alloc_text(PAGE, CdQueryInternalInfo)
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#pragma alloc_text(PAGE, CdQueryNameInfo)
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#pragma alloc_text(PAGE, CdQueryNetworkInfo)
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#pragma alloc_text(PAGE, CdQueryPositionInfo)
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#pragma alloc_text(PAGE, CdQueryStandardInfo)
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#endif
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NTSTATUS
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CdCommonQueryInfo (
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IN PIRP_CONTEXT IrpContext,
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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 is the common routine for query file information called by both the
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fsd and fsp threads.
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Arguments:
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Irp - Supplies the Irp to process.
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Return Value:
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NTSTATUS - The return status for this operation.
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--*/
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{
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NTSTATUS Status = STATUS_SUCCESS;
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );
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ULONG Length;
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FILE_INFORMATION_CLASS FileInformationClass;
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PFILE_ALL_INFORMATION Buffer;
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TYPE_OF_OPEN TypeOfOpen;
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PFCB Fcb;
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PCCB Ccb;
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BOOLEAN ReleaseFcb = FALSE;
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PAGED_CODE();
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//
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// Reference our input parameters to make things easier
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//
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Length = IrpSp->Parameters.QueryFile.Length;
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FileInformationClass = IrpSp->Parameters.QueryFile.FileInformationClass;
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Buffer = Irp->AssociatedIrp.SystemBuffer;
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//
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// Decode the file object
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//
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TypeOfOpen = CdDecodeFileObject( IrpContext, IrpSp->FileObject, &Fcb, &Ccb );
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//
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// Use a try-finally to facilitate cleanup.
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//
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try {
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//
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// We only support query on file and directory handles.
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//
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switch (TypeOfOpen) {
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case UserDirectoryOpen :
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case UserFileOpen :
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//
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// Acquire shared access to this file. NOTE that this could be
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// a recursive acquire, if we already preacquired in
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// CdAcquireForCreateSection().
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//
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CdAcquireFileShared( IrpContext, Fcb );
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ReleaseFcb = TRUE;
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//
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// Make sure we have the correct sizes for a directory.
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//
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if (!FlagOn( Fcb->FcbState, FCB_STATE_INITIALIZED )) {
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ASSERT( TypeOfOpen == UserDirectoryOpen );
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CdCreateInternalStream( IrpContext, Fcb->Vcb, Fcb );
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}
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//
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// Make sure the Fcb is in a usable condition. This will raise
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// an error condition if the volume is unusable
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//
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CdVerifyFcbOperation( IrpContext, Fcb );
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//
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// Based on the information class we'll do different
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// actions. Each of hte procedures that we're calling fills
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// up the output buffer, if possible. They will raise the
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// status STATUS_BUFFER_OVERFLOW for an insufficient buffer.
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// This is considered a somewhat unusual case and is handled
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// more cleanly with the exception mechanism rather than
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// testing a return status value for each call.
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//
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switch (FileInformationClass) {
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case FileAllInformation:
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//
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// We don't allow this operation on a file opened by file Id.
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//
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if (FlagOn( Ccb->Flags, CCB_FLAG_OPEN_BY_ID )) {
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Status = STATUS_INVALID_PARAMETER;
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break;
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}
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//
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// In this case go ahead and call the individual routines to
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// fill in the buffer. Only the name routine will
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// pointer to the output buffer and then call the
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// individual routines to fill in the buffer.
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//
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Length -= (sizeof( FILE_ACCESS_INFORMATION ) +
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sizeof( FILE_MODE_INFORMATION ) +
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sizeof( FILE_ALIGNMENT_INFORMATION ));
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CdQueryBasicInfo( IrpContext, Fcb, &Buffer->BasicInformation, &Length );
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CdQueryStandardInfo( IrpContext, Fcb, &Buffer->StandardInformation, &Length );
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CdQueryInternalInfo( IrpContext, Fcb, &Buffer->InternalInformation, &Length );
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CdQueryEaInfo( IrpContext, Fcb, &Buffer->EaInformation, &Length );
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CdQueryPositionInfo( IrpContext, IrpSp->FileObject, &Buffer->PositionInformation, &Length );
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Status = CdQueryNameInfo( IrpContext, IrpSp->FileObject, &Buffer->NameInformation, &Length );
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break;
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case FileBasicInformation:
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CdQueryBasicInfo( IrpContext, Fcb, (PFILE_BASIC_INFORMATION) Buffer, &Length );
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break;
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case FileStandardInformation:
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CdQueryStandardInfo( IrpContext, Fcb, (PFILE_STANDARD_INFORMATION) Buffer, &Length );
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break;
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case FileInternalInformation:
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CdQueryInternalInfo( IrpContext, Fcb, (PFILE_INTERNAL_INFORMATION) Buffer, &Length );
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break;
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case FileEaInformation:
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CdQueryEaInfo( IrpContext, Fcb, (PFILE_EA_INFORMATION) Buffer, &Length );
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break;
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case FilePositionInformation:
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CdQueryPositionInfo( IrpContext, IrpSp->FileObject, (PFILE_POSITION_INFORMATION) Buffer, &Length );
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break;
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case FileNameInformation:
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//
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// We don't allow this operation on a file opened by file Id.
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//
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if (!FlagOn( Ccb->Flags, CCB_FLAG_OPEN_BY_ID )) {
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Status = CdQueryNameInfo( IrpContext, IrpSp->FileObject, (PFILE_NAME_INFORMATION) Buffer, &Length );
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} else {
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Status = STATUS_INVALID_PARAMETER;
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}
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break;
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case FileAlternateNameInformation:
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if (!FlagOn( Ccb->Flags, CCB_FLAG_OPEN_BY_ID )) {
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Status = CdQueryAlternateNameInfo( IrpContext, Fcb, Ccb, (PFILE_NAME_INFORMATION) Buffer, &Length );
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} else {
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Status = STATUS_INVALID_PARAMETER;
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}
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break;
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case FileNetworkOpenInformation:
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CdQueryNetworkInfo( IrpContext, Fcb, (PFILE_NETWORK_OPEN_INFORMATION) Buffer, &Length );
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break;
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default :
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Status = STATUS_INVALID_PARAMETER;
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}
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break;
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default :
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Status = STATUS_INVALID_PARAMETER;
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}
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//
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// Set the information field to the number of bytes actually filled in
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// and then complete the request
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//
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Irp->IoStatus.Information = IrpSp->Parameters.QueryFile.Length - Length;
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} finally {
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//
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// Release the file.
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//
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if (ReleaseFcb) {
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CdReleaseFile( IrpContext, Fcb );
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}
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}
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//
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// Complete the request if we didn't raise.
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//
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CdCompleteRequest( IrpContext, Irp, Status );
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return Status;
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}
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NTSTATUS
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CdCommonSetInfo (
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IN PIRP_CONTEXT IrpContext,
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IN PIRP Irp
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)
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||
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/*++
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Routine Description:
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This is the common routine for set file information called by both the
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fsd and fsp threads. We only support operations which set the file position.
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Arguments:
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|
||
Irp - Supplies the Irp to process.
|
||
|
||
Return Value:
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||
|
||
NTSTATUS - The return status for this operation.
|
||
|
||
--*/
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||
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{
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NTSTATUS Status = STATUS_INVALID_PARAMETER;
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TYPE_OF_OPEN TypeOfOpen;
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PFCB Fcb;
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PCCB Ccb;
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );
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||
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PFILE_POSITION_INFORMATION Buffer;
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||
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PAGED_CODE();
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||
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||
//
|
||
// Decode the file object
|
||
//
|
||
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||
TypeOfOpen = CdDecodeFileObject( IrpContext, IrpSp->FileObject, &Fcb, &Ccb );
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||
|
||
//
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||
// We only support a SetPositionInformation on a user file.
|
||
//
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||
|
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if ((TypeOfOpen != UserFileOpen) ||
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(IrpSp->Parameters.QueryFile.FileInformationClass != FilePositionInformation)) {
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||
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||
CdCompleteRequest( IrpContext, Irp, Status );
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return Status;
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}
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//
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// Acquire shared access to this file.
|
||
//
|
||
|
||
CdAcquireFileShared( IrpContext, Fcb );
|
||
|
||
try {
|
||
|
||
//
|
||
// Make sure the Fcb is in a usable condition. This
|
||
// will raise an error condition if the fcb is unusable
|
||
//
|
||
|
||
CdVerifyFcbOperation( IrpContext, Fcb );
|
||
|
||
Buffer = Irp->AssociatedIrp.SystemBuffer;
|
||
|
||
//
|
||
// Check if the file does not use intermediate buffering. If it
|
||
// does not use intermediate buffering then the new position we're
|
||
// supplied must be aligned properly for the device
|
||
//
|
||
|
||
if (FlagOn( IrpSp->FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING ) &&
|
||
((Buffer->CurrentByteOffset.LowPart & IrpSp->DeviceObject->AlignmentRequirement) != 0)) {
|
||
|
||
try_return( NOTHING );
|
||
}
|
||
|
||
//
|
||
// The input parameter is fine so set the current byte offset and
|
||
// complete the request
|
||
//
|
||
|
||
//
|
||
// Lock the Fcb to provide synchronization.
|
||
//
|
||
|
||
CdLockFcb( IrpContext, Fcb );
|
||
IrpSp->FileObject->CurrentByteOffset = Buffer->CurrentByteOffset;
|
||
CdUnlockFcb( IrpContext, Fcb );
|
||
|
||
Status = STATUS_SUCCESS;
|
||
|
||
try_exit: NOTHING;
|
||
} finally {
|
||
|
||
CdReleaseFile( IrpContext, Fcb );
|
||
}
|
||
|
||
//
|
||
// Complete the request if there was no raise.
|
||
//
|
||
|
||
CdCompleteRequest( IrpContext, Irp, Status );
|
||
return Status;
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
CdFastQueryBasicInfo (
|
||
IN PFILE_OBJECT FileObject,
|
||
IN BOOLEAN Wait,
|
||
IN OUT PFILE_BASIC_INFORMATION Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
IN PDEVICE_OBJECT DeviceObject
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine is for the fast query call for basic file information.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object used in this operation
|
||
|
||
Wait - Indicates if we are allowed to wait for the information
|
||
|
||
Buffer - Supplies the output buffer to receive the basic information
|
||
|
||
IoStatus - Receives the final status of the operation
|
||
|
||
Return Value:
|
||
|
||
BOOLEAN - TRUE if the operation succeeded and FALSE if the caller
|
||
needs to take the long route.
|
||
|
||
--*/
|
||
|
||
{
|
||
BOOLEAN Result = FALSE;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
|
||
PFCB Fcb;
|
||
|
||
PAGED_CODE();
|
||
|
||
ASSERT_FILE_OBJECT( FileObject );
|
||
|
||
FsRtlEnterFileSystem();
|
||
|
||
//
|
||
// Decode the file object to find the type of open and the data
|
||
// structures.
|
||
//
|
||
|
||
TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
|
||
|
||
//
|
||
// We only support this request on user file or directory objects.
|
||
//
|
||
|
||
if ((TypeOfOpen != UserFileOpen) &&
|
||
((TypeOfOpen != UserDirectoryOpen) || !FlagOn( Fcb->FcbState, FCB_STATE_INITIALIZED))) {
|
||
|
||
FsRtlExitFileSystem();
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// Acquire the file shared to access the Fcb.
|
||
//
|
||
|
||
if (!ExAcquireResourceSharedLite( Fcb->Resource, Wait )) {
|
||
|
||
FsRtlExitFileSystem();
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// Use a try-finally to facilitate cleanup.
|
||
//
|
||
|
||
try {
|
||
|
||
//
|
||
// Only deal with 'good' Fcb's.
|
||
//
|
||
|
||
if (CdVerifyFcbOperation( NULL, Fcb )) {
|
||
|
||
//
|
||
// Fill in the input buffer from the Fcb fields.
|
||
//
|
||
|
||
Buffer->CreationTime.QuadPart =
|
||
Buffer->LastWriteTime.QuadPart =
|
||
Buffer->ChangeTime.QuadPart = Fcb->CreationTime;
|
||
|
||
Buffer->LastAccessTime.QuadPart = 0;
|
||
|
||
Buffer->FileAttributes = Fcb->FileAttributes;
|
||
|
||
//
|
||
// Update the IoStatus block with the size of this data.
|
||
//
|
||
|
||
IoStatus->Status = STATUS_SUCCESS;
|
||
IoStatus->Information = sizeof( FILE_BASIC_INFORMATION );
|
||
|
||
Result = TRUE;
|
||
}
|
||
|
||
} finally {
|
||
|
||
ExReleaseResourceLite( Fcb->Resource );
|
||
|
||
FsRtlExitFileSystem();
|
||
}
|
||
|
||
return Result;
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
CdFastQueryStdInfo (
|
||
IN PFILE_OBJECT FileObject,
|
||
IN BOOLEAN Wait,
|
||
IN OUT PFILE_STANDARD_INFORMATION Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
IN PDEVICE_OBJECT DeviceObject
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine is for the fast query call for standard file information.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object used in this operation
|
||
|
||
Wait - Indicates if we are allowed to wait for the information
|
||
|
||
Buffer - Supplies the output buffer to receive the basic information
|
||
|
||
IoStatus - Receives the final status of the operation
|
||
|
||
Return Value:
|
||
|
||
BOOLEAN - TRUE if the operation succeeded and FALSE if the caller
|
||
needs to take the long route.
|
||
|
||
--*/
|
||
|
||
{
|
||
BOOLEAN Result = FALSE;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
|
||
PFCB Fcb;
|
||
|
||
PAGED_CODE();
|
||
|
||
ASSERT_FILE_OBJECT( FileObject );
|
||
|
||
FsRtlEnterFileSystem();
|
||
|
||
//
|
||
// Decode the file object to find the type of open and the data
|
||
// structures.
|
||
//
|
||
|
||
TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
|
||
|
||
//
|
||
// We only support this request on initialized user file or directory objects.
|
||
//
|
||
|
||
if ((TypeOfOpen != UserFileOpen) &&
|
||
((TypeOfOpen != UserDirectoryOpen) || !FlagOn( Fcb->FcbState, FCB_STATE_INITIALIZED ))) {
|
||
|
||
FsRtlExitFileSystem();
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// Acquire the file shared to access the Fcb.
|
||
//
|
||
|
||
if (!ExAcquireResourceSharedLite( Fcb->Resource, Wait )) {
|
||
|
||
FsRtlExitFileSystem();
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// Use a try-finally to facilitate cleanup.
|
||
//
|
||
|
||
try {
|
||
|
||
//
|
||
// Only deal with 'good' Fcb's.
|
||
//
|
||
|
||
if (CdVerifyFcbOperation( NULL, Fcb )) {
|
||
|
||
//
|
||
// Check whether this is a directory.
|
||
//
|
||
|
||
if (FlagOn( Fcb->FileAttributes, FILE_ATTRIBUTE_DIRECTORY )) {
|
||
|
||
Buffer->AllocationSize.QuadPart =
|
||
Buffer->EndOfFile.QuadPart = 0;
|
||
|
||
Buffer->Directory = TRUE;
|
||
|
||
} else {
|
||
|
||
Buffer->AllocationSize.QuadPart = Fcb->AllocationSize.QuadPart;
|
||
Buffer->EndOfFile.QuadPart = Fcb->FileSize.QuadPart;
|
||
|
||
Buffer->Directory = FALSE;
|
||
}
|
||
|
||
Buffer->NumberOfLinks = 1;
|
||
Buffer->DeletePending = FALSE;
|
||
|
||
//
|
||
// Update the IoStatus block with the size of this data.
|
||
//
|
||
|
||
IoStatus->Status = STATUS_SUCCESS;
|
||
IoStatus->Information = sizeof( FILE_STANDARD_INFORMATION );
|
||
|
||
Result = TRUE;
|
||
}
|
||
|
||
} finally {
|
||
|
||
ExReleaseResourceLite( Fcb->Resource );
|
||
|
||
FsRtlExitFileSystem();
|
||
}
|
||
|
||
return Result;
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
CdFastQueryNetworkInfo (
|
||
IN PFILE_OBJECT FileObject,
|
||
IN BOOLEAN Wait,
|
||
OUT PFILE_NETWORK_OPEN_INFORMATION Buffer,
|
||
OUT PIO_STATUS_BLOCK IoStatus,
|
||
IN PDEVICE_OBJECT DeviceObject
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine is for the fast query call for network file information.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object used in this operation
|
||
|
||
Wait - Indicates if we are allowed to wait for the information
|
||
|
||
Buffer - Supplies the output buffer to receive the basic information
|
||
|
||
IoStatus - Receives the final status of the operation
|
||
|
||
Return Value:
|
||
|
||
BOOLEAN - TRUE if the operation succeeded and FALSE if the caller
|
||
needs to take the long route.
|
||
|
||
--*/
|
||
|
||
{
|
||
BOOLEAN Result = FALSE;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
|
||
PFCB Fcb;
|
||
|
||
PAGED_CODE();
|
||
|
||
ASSERT_FILE_OBJECT( FileObject );
|
||
|
||
FsRtlEnterFileSystem();
|
||
|
||
//
|
||
// Decode the file object to find the type of open and the data
|
||
// structures.
|
||
//
|
||
|
||
TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
|
||
|
||
//
|
||
// We only support this request on user file or directory objects.
|
||
//
|
||
|
||
if ((TypeOfOpen != UserFileOpen) &&
|
||
((TypeOfOpen != UserDirectoryOpen) || !FlagOn( Fcb->FcbState, FCB_STATE_INITIALIZED))) {
|
||
|
||
FsRtlExitFileSystem();
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// Acquire the file shared to access the Fcb.
|
||
//
|
||
|
||
if (!ExAcquireResourceSharedLite( Fcb->Resource, Wait )) {
|
||
|
||
FsRtlExitFileSystem();
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// Use a try-finally to facilitate cleanup.
|
||
//
|
||
|
||
try {
|
||
|
||
//
|
||
// Only deal with 'good' Fcb's.
|
||
//
|
||
|
||
if (CdVerifyFcbOperation( NULL, Fcb )) {
|
||
|
||
//
|
||
// Fill in the input buffer from the Fcb fields.
|
||
//
|
||
|
||
Buffer->CreationTime.QuadPart =
|
||
Buffer->LastWriteTime.QuadPart =
|
||
Buffer->ChangeTime.QuadPart = Fcb->CreationTime;
|
||
|
||
Buffer->LastAccessTime.QuadPart = 0;
|
||
|
||
Buffer->FileAttributes = Fcb->FileAttributes;
|
||
|
||
//
|
||
// Check whether this is a directory.
|
||
//
|
||
|
||
if (FlagOn( Fcb->FileAttributes, FILE_ATTRIBUTE_DIRECTORY )) {
|
||
|
||
Buffer->AllocationSize.QuadPart =
|
||
Buffer->EndOfFile.QuadPart = 0;
|
||
|
||
} else {
|
||
|
||
Buffer->AllocationSize.QuadPart = Fcb->AllocationSize.QuadPart;
|
||
Buffer->EndOfFile.QuadPart = Fcb->FileSize.QuadPart;
|
||
}
|
||
|
||
//
|
||
// Update the IoStatus block with the size of this data.
|
||
//
|
||
|
||
IoStatus->Status = STATUS_SUCCESS;
|
||
IoStatus->Information = sizeof( FILE_NETWORK_OPEN_INFORMATION );
|
||
|
||
Result = TRUE;
|
||
}
|
||
|
||
} finally {
|
||
|
||
ExReleaseResourceLite( Fcb->Resource );
|
||
|
||
FsRtlExitFileSystem();
|
||
}
|
||
|
||
return Result;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
VOID
|
||
CdQueryBasicInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFCB Fcb,
|
||
IN OUT PFILE_BASIC_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
|
||
/*++
|
||
|
||
Description:
|
||
|
||
This routine performs the query basic information function for Cdfs
|
||
|
||
Arguments:
|
||
|
||
Fcb - Supplies the Fcb being queried, it has been verified
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
None
|
||
|
||
--*/
|
||
|
||
{
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// We only support creation, last modify and last write times on Cdfs.
|
||
//
|
||
|
||
Buffer->LastWriteTime.QuadPart =
|
||
Buffer->CreationTime.QuadPart =
|
||
Buffer->ChangeTime.QuadPart = Fcb->CreationTime;
|
||
|
||
Buffer->LastAccessTime.QuadPart = 0;
|
||
|
||
Buffer->FileAttributes = Fcb->FileAttributes;
|
||
|
||
//
|
||
// Update the length and status output variables
|
||
//
|
||
|
||
*Length -= sizeof( FILE_BASIC_INFORMATION );
|
||
|
||
return;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
VOID
|
||
CdQueryStandardInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFCB Fcb,
|
||
IN OUT PFILE_STANDARD_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine performs the query standard information function for cdfs.
|
||
|
||
Arguments:
|
||
|
||
Fcb - Supplies the Fcb being queried, it has been verified
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
None
|
||
|
||
--*/
|
||
|
||
{
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// There is only one link and delete is never pending on a Cdrom file.
|
||
//
|
||
|
||
Buffer->NumberOfLinks = 1;
|
||
Buffer->DeletePending = FALSE;
|
||
|
||
//
|
||
// We get the sizes from the header. Return a size of zero
|
||
// for all directories.
|
||
//
|
||
|
||
if (FlagOn( Fcb->FileAttributes, FILE_ATTRIBUTE_DIRECTORY )) {
|
||
|
||
Buffer->AllocationSize.QuadPart =
|
||
Buffer->EndOfFile.QuadPart = 0;
|
||
|
||
Buffer->Directory = TRUE;
|
||
|
||
} else {
|
||
|
||
Buffer->AllocationSize.QuadPart = Fcb->AllocationSize.QuadPart;
|
||
Buffer->EndOfFile.QuadPart = Fcb->FileSize.QuadPart;
|
||
|
||
Buffer->Directory = FALSE;
|
||
}
|
||
|
||
//
|
||
// Update the length and status output variables
|
||
//
|
||
|
||
*Length -= sizeof( FILE_STANDARD_INFORMATION );
|
||
|
||
return;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
VOID
|
||
CdQueryInternalInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFCB Fcb,
|
||
IN OUT PFILE_INTERNAL_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine performs the query internal information function for cdfs.
|
||
|
||
Arguments:
|
||
|
||
Fcb - Supplies the Fcb being queried, it has been verified
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
None
|
||
|
||
--*/
|
||
|
||
{
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// Index number is the file Id number in the Fcb.
|
||
//
|
||
|
||
Buffer->IndexNumber = Fcb->FileId;
|
||
*Length -= sizeof( FILE_INTERNAL_INFORMATION );
|
||
|
||
return;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
VOID
|
||
CdQueryEaInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFCB Fcb,
|
||
IN OUT PFILE_EA_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine performs the query Ea information function for cdfs.
|
||
|
||
Arguments:
|
||
|
||
Fcb - Supplies the Fcb being queried, it has been verified
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
None
|
||
|
||
--*/
|
||
|
||
{
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// No Ea's on Cdfs volumes.
|
||
//
|
||
|
||
Buffer->EaSize = 0;
|
||
*Length -= sizeof( FILE_EA_INFORMATION );
|
||
|
||
return;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
VOID
|
||
CdQueryPositionInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFILE_OBJECT FileObject,
|
||
IN OUT PFILE_POSITION_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine performs the query position information function for cdfs.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the File object being queried
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
None
|
||
|
||
--*/
|
||
|
||
{
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// Get the current position found in the file object.
|
||
//
|
||
|
||
Buffer->CurrentByteOffset = FileObject->CurrentByteOffset;
|
||
|
||
//
|
||
// Update the length and status output variables
|
||
//
|
||
|
||
*Length -= sizeof( FILE_POSITION_INFORMATION );
|
||
|
||
return;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
NTSTATUS
|
||
CdQueryNameInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFILE_OBJECT FileObject,
|
||
IN OUT PFILE_NAME_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine performs the query name information function for cdfs.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object containing the name.
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
NTSTATUS - STATUS_BUFFER_OVERFLOW if the entire name can't be copied.
|
||
|
||
--*/
|
||
|
||
{
|
||
NTSTATUS Status = STATUS_SUCCESS;
|
||
ULONG LengthToCopy;
|
||
|
||
PAGED_CODE();
|
||
|
||
ASSERT(*Length >= sizeof(ULONG));
|
||
|
||
//
|
||
// Simply copy the name in the file object to the user's buffer.
|
||
//
|
||
|
||
//
|
||
// Place the size of the filename in the user's buffer and reduce the remaining
|
||
// size to match.
|
||
//
|
||
|
||
Buffer->FileNameLength = LengthToCopy = FileObject->FileName.Length;
|
||
*Length -= sizeof(ULONG);
|
||
|
||
if (LengthToCopy > *Length) {
|
||
|
||
LengthToCopy = *Length;
|
||
Status = STATUS_BUFFER_OVERFLOW;
|
||
}
|
||
|
||
RtlCopyMemory( Buffer->FileName, FileObject->FileName.Buffer, LengthToCopy );
|
||
|
||
//
|
||
// Reduce the available bytes by the amount stored into this buffer. In the overflow
|
||
// case, this simply drops to zero. The returned filenamelength will indicate to the
|
||
// caller how much space is required.
|
||
//
|
||
|
||
*Length -= LengthToCopy;
|
||
|
||
return Status;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
NTSTATUS
|
||
CdQueryAlternateNameInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFCB Fcb,
|
||
IN PCCB Ccb,
|
||
IN OUT PFILE_NAME_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine performs the query alternate name information function.
|
||
We lookup the dirent for this file and then check if there is a
|
||
short name.
|
||
|
||
Arguments:
|
||
|
||
Fcb - Supplies the Fcb being queried, it has been verified.
|
||
|
||
Ccb - Ccb for this open handle.
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned.
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
NTSTATUS - STATUS_SUCCESS if the whole name would fit into the user buffer,
|
||
STATUS_OBJECT_NAME_NOT_FOUND if we can't return the name,
|
||
STATUS_BUFFER_OVERFLOW otherwise.
|
||
|
||
--*/
|
||
|
||
{
|
||
NTSTATUS Status = STATUS_SUCCESS;
|
||
|
||
DIRENT_ENUM_CONTEXT DirContext;
|
||
DIRENT Dirent;
|
||
|
||
PUNICODE_STRING NameToUse;
|
||
ULONG DirentOffset;
|
||
|
||
COMPOUND_PATH_ENTRY CompoundPathEntry;
|
||
FILE_ENUM_CONTEXT FileContext;
|
||
|
||
PFCB ParentFcb;
|
||
BOOLEAN ReleaseParentFcb = FALSE;
|
||
|
||
BOOLEAN CleanupFileLookup = FALSE;
|
||
BOOLEAN CleanupDirectoryLookup = FALSE;
|
||
|
||
WCHAR ShortNameBuffer[ BYTE_COUNT_8_DOT_3 / 2 ];
|
||
USHORT ShortNameLength;
|
||
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// Initialize the buffer length to zero.
|
||
//
|
||
|
||
Buffer->FileNameLength = 0;
|
||
|
||
//
|
||
// If this is the root or this file was opened using a version number then
|
||
// there is no short name.
|
||
//
|
||
|
||
if ((Fcb == Fcb->Vcb->RootIndexFcb) ||
|
||
FlagOn( Ccb->Flags, CCB_FLAG_OPEN_WITH_VERSION)) {
|
||
|
||
return STATUS_OBJECT_NAME_NOT_FOUND;
|
||
}
|
||
|
||
//
|
||
// Use a try-finally to cleanup the structures.
|
||
//
|
||
|
||
try {
|
||
|
||
ParentFcb = Fcb->ParentFcb;
|
||
CdAcquireFileShared( IrpContext, ParentFcb );
|
||
ReleaseParentFcb = TRUE;
|
||
|
||
//
|
||
// Do an unsafe test to see if we need to create a file object.
|
||
//
|
||
|
||
if (ParentFcb->FileObject == NULL) {
|
||
|
||
CdCreateInternalStream( IrpContext, ParentFcb->Vcb, ParentFcb );
|
||
}
|
||
|
||
if (CdFidIsDirectory( Fcb->FileId)) {
|
||
|
||
//
|
||
// Fcb is for a directory, so we need to dig the dirent from the parent. In
|
||
// order to do this we need to get the name of the directory from its pathtable
|
||
// entry and then search in the parent for a matching dirent.
|
||
//
|
||
// This could be optimized somewhat.
|
||
//
|
||
|
||
CdInitializeCompoundPathEntry( IrpContext, &CompoundPathEntry );
|
||
CdInitializeFileContext( IrpContext, &FileContext );
|
||
|
||
CleanupDirectoryLookup = TRUE;
|
||
|
||
CdLookupPathEntry( IrpContext,
|
||
CdQueryFidPathTableOffset( Fcb->FileId ),
|
||
Fcb->Ordinal,
|
||
FALSE,
|
||
&CompoundPathEntry );
|
||
|
||
CdUpdatePathEntryName( IrpContext, &CompoundPathEntry.PathEntry, TRUE );
|
||
|
||
if (!CdFindDirectory( IrpContext,
|
||
ParentFcb,
|
||
&CompoundPathEntry.PathEntry.CdCaseDirName,
|
||
TRUE,
|
||
&FileContext )) {
|
||
|
||
//
|
||
// If we failed to find the child directory by name in the parent
|
||
// something is quite wrong with this disc.
|
||
//
|
||
|
||
CdRaiseStatus( IrpContext, STATUS_DISK_CORRUPT_ERROR );
|
||
}
|
||
|
||
NameToUse = &FileContext.InitialDirent->Dirent.CdCaseFileName.FileName;
|
||
DirentOffset = FileContext.InitialDirent->Dirent.DirentOffset;
|
||
|
||
} else {
|
||
|
||
//
|
||
// Initialize the search dirent structures.
|
||
//
|
||
|
||
CdInitializeDirContext( IrpContext, &DirContext );
|
||
CdInitializeDirent( IrpContext, &Dirent );
|
||
|
||
CleanupFileLookup = TRUE;
|
||
|
||
CdLookupDirent( IrpContext,
|
||
ParentFcb,
|
||
CdQueryFidDirentOffset( Fcb->FileId ),
|
||
&DirContext );
|
||
|
||
CdUpdateDirentFromRawDirent( IrpContext,
|
||
ParentFcb,
|
||
&DirContext,
|
||
&Dirent );
|
||
|
||
//
|
||
// Now update the dirent name.
|
||
//
|
||
|
||
CdUpdateDirentName( IrpContext, &Dirent, TRUE );
|
||
|
||
NameToUse = &Dirent.CdCaseFileName.FileName;
|
||
DirentOffset = Dirent.DirentOffset;
|
||
}
|
||
|
||
//
|
||
// If the name is 8.3 then fail this request.
|
||
//
|
||
|
||
if (CdIs8dot3Name( IrpContext,
|
||
*NameToUse )) {
|
||
|
||
|
||
try_return( Status = STATUS_OBJECT_NAME_NOT_FOUND );
|
||
}
|
||
|
||
CdGenerate8dot3Name( IrpContext,
|
||
NameToUse,
|
||
DirentOffset,
|
||
ShortNameBuffer,
|
||
&ShortNameLength );
|
||
|
||
//
|
||
// We now have the short name. We have left it in Unicode form so copy it directly.
|
||
//
|
||
|
||
Buffer->FileNameLength = ShortNameLength;
|
||
|
||
if (Buffer->FileNameLength + sizeof( ULONG ) > *Length) {
|
||
|
||
Buffer->FileNameLength = *Length - sizeof( ULONG );
|
||
Status = STATUS_BUFFER_OVERFLOW;
|
||
}
|
||
|
||
RtlCopyMemory( Buffer->FileName, ShortNameBuffer, Buffer->FileNameLength );
|
||
|
||
try_exit: NOTHING;
|
||
} finally {
|
||
|
||
if (CleanupFileLookup) {
|
||
|
||
CdCleanupDirContext( IrpContext, &DirContext );
|
||
CdCleanupDirent( IrpContext, &Dirent );
|
||
|
||
} else if (CleanupDirectoryLookup) {
|
||
|
||
CdCleanupCompoundPathEntry( IrpContext, &CompoundPathEntry );
|
||
CdCleanupFileContext( IrpContext, &FileContext );
|
||
}
|
||
|
||
if (ReleaseParentFcb) {
|
||
|
||
CdReleaseFile( IrpContext, ParentFcb );
|
||
}
|
||
}
|
||
|
||
//
|
||
// Reduce the available bytes by the amount stored into this buffer.
|
||
//
|
||
|
||
if (Status != STATUS_OBJECT_NAME_NOT_FOUND) {
|
||
|
||
*Length -= sizeof( ULONG ) + Buffer->FileNameLength;
|
||
}
|
||
|
||
return Status;
|
||
}
|
||
|
||
|
||
//
|
||
// Local support routine
|
||
//
|
||
|
||
VOID
|
||
CdQueryNetworkInfo (
|
||
IN PIRP_CONTEXT IrpContext,
|
||
IN PFCB Fcb,
|
||
IN OUT PFILE_NETWORK_OPEN_INFORMATION Buffer,
|
||
IN OUT PULONG Length
|
||
)
|
||
|
||
/*++
|
||
|
||
Description:
|
||
|
||
This routine performs the query network open information function for Cdfs
|
||
|
||
Arguments:
|
||
|
||
Fcb - Supplies the Fcb being queried, it has been verified
|
||
|
||
Buffer - Supplies a pointer to the buffer where the information is to
|
||
be returned
|
||
|
||
Length - Supplies the length of the buffer in bytes, and receives the
|
||
remaining bytes free in the buffer upon return.
|
||
|
||
Return Value:
|
||
|
||
None
|
||
|
||
--*/
|
||
|
||
{
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// We only support creation, last modify and last write times on Cdfs.
|
||
//
|
||
|
||
Buffer->LastWriteTime.QuadPart =
|
||
Buffer->CreationTime.QuadPart =
|
||
Buffer->ChangeTime.QuadPart = Fcb->CreationTime;
|
||
|
||
Buffer->LastAccessTime.QuadPart = 0;
|
||
|
||
Buffer->FileAttributes = Fcb->FileAttributes;
|
||
|
||
//
|
||
// We get the sizes from the header. Return a size of zero
|
||
// for all directories.
|
||
//
|
||
|
||
if (FlagOn( Fcb->FileAttributes, FILE_ATTRIBUTE_DIRECTORY )) {
|
||
|
||
Buffer->AllocationSize.QuadPart =
|
||
Buffer->EndOfFile.QuadPart = 0;
|
||
|
||
} else {
|
||
|
||
Buffer->AllocationSize.QuadPart = Fcb->AllocationSize.QuadPart;
|
||
Buffer->EndOfFile.QuadPart = Fcb->FileSize.QuadPart;
|
||
}
|
||
|
||
//
|
||
// Update the length and status output variables
|
||
//
|
||
|
||
*Length -= sizeof( FILE_NETWORK_OPEN_INFORMATION );
|
||
|
||
return;
|
||
}
|