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532 lines
15 KiB
532 lines
15 KiB
//+----------------------------------------------------------------------------
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//
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// File: VOLINFO.C
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//
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// Contents: This module implements the volume information routines for
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// Dfs called by the dispatch driver.
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//
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// Functions: DfsFsdQueryVolumeInformation
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// DfsFspQueryVolumeInformation
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// DfsCommonQueryVolumeInformation
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// DfsFsdSetVolumeInformation
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// DfsFspSetVolumeInformation
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// DfsCommonSetVolumeInformation
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//
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// Notes: The Query information call is a candidate for directly
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// passing through via DfsVolumePassThrough. We'll keep
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// the entry point around for now as a convenient place
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// for breakpointing and tracing volume information calls.
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//
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// History: 12 Nov 1991 AlanW Created from CDFS souce.
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//
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//-----------------------------------------------------------------------------
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#include "dfsprocs.h"
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//
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// The local debug trace level
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//
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#define Dbg (DEBUG_TRACE_VOLINFO)
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//
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// Local procedure prototypes
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//
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NTSTATUS
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DfsCommonQueryVolumeInformation (
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IN PIRP_CONTEXT IrpContext,
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IN PIRP Irp
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);
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NTSTATUS
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DfsCommonSetVolumeInformation (
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IN PIRP_CONTEXT IrpContext,
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IN PIRP Irp
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);
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#define DfsSetFsLabelInfo(irpc,pvcb,pbuf) (STATUS_ACCESS_DENIED)
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text( PAGE, DfsFsdQueryVolumeInformation )
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#pragma alloc_text( PAGE, DfsFspQueryVolumeInformation )
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#pragma alloc_text( PAGE, DfsCommonQueryVolumeInformation )
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#pragma alloc_text( PAGE, DfsFsdSetVolumeInformation )
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#pragma alloc_text( PAGE, DfsFspSetVolumeInformation )
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#pragma alloc_text( PAGE, DfsCommonSetVolumeInformation )
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#endif // ALLOC_PRAGMA
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//+-------------------------------------------------------------------
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//
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// Function: DfsFsdQueryVolumeInformation, public
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//
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// Synopsis: This routine implements the Fsd part of the
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// NtQueryVolumeInformation API call.
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//
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// Arguments: [DeviceObject] -- Supplies the device object where the file
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// being queried exists.
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// [Irp] -- Supplies the Irp being processed.
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//
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// Returns: NTSTATUS - The FSD status for the Irp.
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//
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//--------------------------------------------------------------------
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NTSTATUS
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DfsFsdQueryVolumeInformation (
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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) {
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NTSTATUS Status;
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PIRP_CONTEXT IrpContext;
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DfsDbgTrace(+1, Dbg, "DfsFsdQueryVolumeInformation: Entered\n", 0);
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if (DeviceObject->DeviceType == FILE_DEVICE_MULTI_UNC_PROVIDER) {
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DfsCompleteRequest( NULL, Irp, STATUS_INVALID_DEVICE_REQUEST );
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DfsDbgTrace(-1, Dbg, "DfsFsdQueryVolumeInformation - Mup file\n", 0);
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return( STATUS_INVALID_DEVICE_REQUEST );
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}
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if (DeviceObject->DeviceType == FILE_DEVICE_DFS_VOLUME) {
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Status = DfsVolumePassThrough(DeviceObject, Irp);
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DfsDbgTrace(-1, Dbg, "DfsFsdQueryVolumeInformation: Exit -> %08x\n",
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Status );
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return Status;
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}
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//
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// Call the common query routine, with blocking allowed if synchronous
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//
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FsRtlEnterFileSystem();
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try {
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IrpContext = DfsCreateIrpContext( Irp, CanFsdWait( Irp ) );
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Status = DfsCommonQueryVolumeInformation( IrpContext, Irp );
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} except(DfsExceptionFilter( IrpContext, GetExceptionCode(), GetExceptionInformation() )) {
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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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Status = DfsProcessException( IrpContext, Irp, GetExceptionCode() );
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}
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FsRtlExitFileSystem();
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//
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// And return to our caller
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//
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DfsDbgTrace(-1, Dbg, "DfsFsdQueryVolumeInformation: Exit -> %08x\n",
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Status);
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return Status;
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UNREFERENCED_PARAMETER( DeviceObject );
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}
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//+-------------------------------------------------------------------
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//
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// Function: DfsFspQueryVolumeInformation, public
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//
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// Synopsis: This routine implements the FSP part of the
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// NtQueryVolumeInformation API call.
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//
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// Arguments: [IrpContext] -- the IRP_CONTEXT for the request
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// [Irp] -- Supplies the Irp being processed.
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//
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// Returns: Nothing
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//
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//--------------------------------------------------------------------
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VOID
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DfsFspQueryVolumeInformation (
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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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DfsDbgTrace(+1, Dbg, "DfsFspQueryVolumeInformation: Entered\n", 0);
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//
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// Call the common query routine.
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//
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(VOID)DfsCommonQueryVolumeInformation( IrpContext, Irp );
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//
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// And return to our caller
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//
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DfsDbgTrace(-1, Dbg, "DfsFspQueryVolumeInformation: Exit -> VOID\n", 0);
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return;
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}
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//+-------------------------------------------------------------------
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//
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// Function: DfsCommonQueryVolumeInformation, private
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//
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// Synopsis: This is the common routine for querying volume information
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// called by both the FSD and FSP threads.
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//
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// Arguments: [IrpContext] -- Supplies the context block for the IRP
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// [Irp] -- Supplies the IRP being processed
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//
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// Returns: NTSTATUS - The return status for the operation
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//
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//--------------------------------------------------------------------
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NTSTATUS
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DfsCommonQueryVolumeInformation (
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IN PIRP_CONTEXT IrpContext,
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IN PIRP Irp
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) {
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NTSTATUS Status;
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PIO_STACK_LOCATION IrpSp;
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PIO_STACK_LOCATION NextIrpSp;
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PDFS_VCB Vcb;
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PDFS_FCB Fcb;
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ULONG Length;
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FS_INFORMATION_CLASS FsInformationClass;
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PVOID Buffer;
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TYPE_OF_OPEN TypeOfOpen;
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//
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// Get the current stack location
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//
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IrpSp = IoGetCurrentIrpStackLocation( Irp );
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DfsDbgTrace(+1, Dbg, "DfsCommonQueryVolumeInformation: Entered\n", 0);
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DfsDbgTrace( 0, Dbg, "Irp = %08x\n", Irp );
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DfsDbgTrace( 0, Dbg, "->Length = %08x\n", IrpSp->Parameters.QueryVolume.Length);
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DfsDbgTrace( 0, Dbg, "->FsInformationClass = %08x\n", IrpSp->Parameters.QueryVolume.FsInformationClass);
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DfsDbgTrace( 0, Dbg, "->Buffer = %08x\n", Irp->AssociatedIrp.SystemBuffer);
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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.QueryVolume.Length;
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FsInformationClass = IrpSp->Parameters.QueryVolume.FsInformationClass;
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Buffer = Irp->AssociatedIrp.SystemBuffer;
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//
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// Decode the file object to get the Vcb
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//
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TypeOfOpen = DfsDecodeFileObject( IrpSp->FileObject, &Vcb, &Fcb);
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try {
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Status = STATUS_INVALID_PARAMETER;
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//
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// Case on the type of open.
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//
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switch (TypeOfOpen) {
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default:
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DfsDbgTrace(0, Dbg,
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"DfsCommonQueryVolumeInfo: Unknown open type\n", 0);
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invalid:
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// NOTE: FALL THROUGH
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case FilesystemDeviceOpen:
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Status = STATUS_INVALID_DEVICE_REQUEST;
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break;
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case LogicalRootDeviceOpen:
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DfsDbgTrace(0, Dbg,
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"DfsCommonQueryVolumeInfo: Logical root open\n", 0);
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goto invalid;
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case RedirectedFileOpen:
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//
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// Nothing special is done base on the information class.
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// We simply pass each request through to the underlying
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// file system and let it handle the request.
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//
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//
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// Copy the stack from one to the next...
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//
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NextIrpSp = IoGetNextIrpStackLocation(Irp);
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(*NextIrpSp) = (*IrpSp);
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IoSetCompletionRoutine( Irp,
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NULL,
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NULL,
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FALSE,
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FALSE,
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FALSE);
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//
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// Call the next device in the chain
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//
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Status = IoCallDriver( Fcb->TargetDevice, Irp );
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//
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// The IRP will be completed by the called driver. We have
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// no need for the IrpContext in the completion routine.
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//
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DfsDeleteIrpContext(IrpContext);
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IrpContext = NULL;
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Irp = NULL;
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break;
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}
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} finally {
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DfsDbgTrace(-1, Dbg, "DfsCommonQueryVolumeInformation: Exit -> %08x\n",
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Status);
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}
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return Status;
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}
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//+-------------------------------------------------------------------
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//
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// Function: DfsFsdSetVolumeInformation, public
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//
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// Synopsis: This routine implements the Fsd part of the
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// NtSetVolumeInformation API call.
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//
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// Arguments: [DeviceObject] -- Supplies the device object where the file
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// being queried exists.
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// [Irp] -- Supplies the Irp being processed.
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//
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// Returns: NTSTATUS - The FSD status for the Irp.
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//
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//--------------------------------------------------------------------
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NTSTATUS
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DfsFsdSetVolumeInformation (
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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) {
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NTSTATUS Status;
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PIRP_CONTEXT IrpContext;
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DfsDbgTrace(+1, Dbg, "DfsFsdSetVolumeInformation: Entered\n", 0);
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if (DeviceObject->DeviceType == FILE_DEVICE_MULTI_UNC_PROVIDER) {
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DfsCompleteRequest( NULL, Irp, STATUS_INVALID_DEVICE_REQUEST );
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DfsDbgTrace(-1, Dbg, "DfsFsdSetVolumeInformation - Mup file\n", 0);
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return( STATUS_INVALID_DEVICE_REQUEST );
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}
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if (DeviceObject->DeviceType == FILE_DEVICE_DFS_VOLUME) {
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Status = DfsVolumePassThrough(DeviceObject, Irp);
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DfsDbgTrace(-1, Dbg, "DfsFsdSetVolumeInformation: Exit -> %08x\n",
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Status );
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return Status;
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}
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//
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// Call the common Set routine, with blocking allowed if synchronous
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//
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FsRtlEnterFileSystem();
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try {
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IrpContext = DfsCreateIrpContext( Irp, CanFsdWait( Irp ) );
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Status = DfsCommonSetVolumeInformation( IrpContext, Irp );
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} except(DfsExceptionFilter( IrpContext, GetExceptionCode(), GetExceptionInformation() )) {
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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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Status = DfsProcessException( IrpContext, Irp, GetExceptionCode() );
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}
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FsRtlExitFileSystem();
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//
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// And return to our caller
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//
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DfsDbgTrace(-1, Dbg, "DfsFsdSetVolumeInformation: Exit -> %08x\n",
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Status);
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return Status;
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UNREFERENCED_PARAMETER( DeviceObject );
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}
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//+-------------------------------------------------------------------
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//
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// Function: DfsFspSetVolumeInformation, public
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//
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// Synopsis: This routine implements the FSP part of the
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// NtSetVolumeInformation API call.
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//
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// Arguments: [IrpContext] -- the IRP_CONTEXT for the request
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// [Irp] -- Supplies the Irp being processed.
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//
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// Returns: Nothing
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//
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//--------------------------------------------------------------------
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VOID
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DfsFspSetVolumeInformation (
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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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DfsDbgTrace(+1, Dbg, "DfsFspSetVolumeInformation: Entered\n", 0);
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//
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// Call the common Set routine.
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//
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(VOID)DfsCommonSetVolumeInformation( IrpContext, Irp );
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//
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// And return to our caller
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//
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DfsDbgTrace(-1, Dbg, "DfsFspSetVolumeInformation: Exit -> VOID\n", 0);
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return;
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}
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//+-------------------------------------------------------------------
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//
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// Function: DfsCommonSetVolumeInformation, private
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//
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// Synopsis: This is the common routine for Seting volume information
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// called by both the FSD and FSP threads.
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//
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// Arguments: [IrpContext] -- Supplies the context block for the IRP
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// [Irp] -- Supplies the IRP being processed
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//
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// Returns: NTSTATUS - The return status for the operation
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//
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//--------------------------------------------------------------------
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NTSTATUS
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DfsCommonSetVolumeInformation (
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IN PIRP_CONTEXT IrpContext,
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IN PIRP Irp
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) {
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NTSTATUS Status;
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PIO_STACK_LOCATION IrpSp;
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PDFS_VCB Vcb;
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PDFS_FCB Fcb;
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FS_INFORMATION_CLASS FsInformationClass;
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PVOID Buffer;
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TYPE_OF_OPEN TypeOfOpen;
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//
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// Get the current stack location
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//
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IrpSp = IoGetCurrentIrpStackLocation( Irp );
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DfsDbgTrace(+1, Dbg, "DfsCommonSetVolumeInformation: Entered\n", 0);
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DfsDbgTrace( 0, Dbg, "Irp = %08x\n", Irp );
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DfsDbgTrace( 0, Dbg, "->Length = %08x\n", IrpSp->Parameters.SetVolume.Length);
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DfsDbgTrace( 0, Dbg, "->FsInformationClass = %08x\n", IrpSp->Parameters.SetVolume.FsInformationClass);
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DfsDbgTrace( 0, Dbg, "->Buffer = %08x\n", Irp->AssociatedIrp.SystemBuffer);
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//
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// Reference our input parameters to make things easier
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//
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FsInformationClass = IrpSp->Parameters.SetVolume.FsInformationClass;
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Buffer = Irp->AssociatedIrp.SystemBuffer;
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//
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// Decode the file object to get the Vcb
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//
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TypeOfOpen = DfsDecodeFileObject( IrpSp->FileObject, &Vcb, &Fcb);
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try {
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Status = STATUS_INVALID_PARAMETER;
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//
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// Case on the type of open.
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//
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switch (TypeOfOpen) {
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default:
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DfsDbgTrace(0, Dbg, "DfsCommonSetVolumeInfo: Unknown open type\n", 0);
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// NOTE: FALL THROUGH
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case FilesystemDeviceOpen:
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Status = STATUS_INVALID_DEVICE_REQUEST;
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break;
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case LogicalRootDeviceOpen:
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case RedirectedFileOpen:
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//
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// Based on the information class we'll do different actions.
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// Each of the procedures that we're calling fills up the output
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// buffer if possible and returns true if it successfully filled
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// the buffer and false if it couldn't wait for any I/O to
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// complete.
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//
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switch (FsInformationClass) {
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case FileFsLabelInformation:
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Status = DfsSetFsLabelInfo( IrpContext, Vcb, Buffer);
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break;
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default:
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DfsDbgTrace(0, Dbg, "DfsCommonSetVolumeInfo: Unknown InformationClass\n", 0);
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Status = STATUS_INVALID_DEVICE_REQUEST;
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break;
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}
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}
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} finally {
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if (!AbnormalTermination()) {
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DfsCompleteRequest( IrpContext, Irp, Status );
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}
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DfsDbgTrace(-1, Dbg, "DfsCommonSetVolumeInformation: Exit -> %08x\n",
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Status);
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}
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return Status;
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}
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