mirror of
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605 lines
12 KiB
C
Executable file
605 lines
12 KiB
C
Executable file
/*++
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Copyright (c) 1989-2000 Microsoft Corporation
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Module Name:
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VolInfo.c
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Abstract:
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This module implements the volume information routines for Cdfs called by
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the dispatch driver.
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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_VOLINFO)
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//
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// Local support routines
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//
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_Requires_lock_held_(_Global_critical_region_)
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NTSTATUS
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CdQueryFsVolumeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_VOLUME_INFORMATION Buffer,
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_Inout_ PULONG Length
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);
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NTSTATUS
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CdQueryFsSizeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_SIZE_INFORMATION Buffer,
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_Inout_ PULONG Length
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);
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NTSTATUS
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CdQueryFsDeviceInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_DEVICE_INFORMATION Buffer,
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_Inout_ PULONG Length
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);
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NTSTATUS
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CdQueryFsAttributeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_ATTRIBUTE_INFORMATION Buffer,
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_Inout_ PULONG Length
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);
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#ifdef __REACTOS__
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#define PFILE_FS_SECTOR_SIZE_INFORMATION PVOID
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#endif
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NTSTATUS
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CdQueryFsSectorSizeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_writes_bytes_(*Length) PFILE_FS_SECTOR_SIZE_INFORMATION Buffer,
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_Inout_ PULONG Length
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, CdCommonQueryVolInfo)
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#pragma alloc_text(PAGE, CdQueryFsAttributeInfo)
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#pragma alloc_text(PAGE, CdQueryFsDeviceInfo)
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#pragma alloc_text(PAGE, CdQueryFsSizeInfo)
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#pragma alloc_text(PAGE, CdQueryFsVolumeInfo)
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#pragma alloc_text(PAGE, CdQueryFsSectorSizeInfo)
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#endif
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_Requires_lock_held_(_Global_critical_region_)
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NTSTATUS
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CdCommonQueryVolInfo (
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_Inout_ PIRP_CONTEXT IrpContext,
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_Inout_ 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 querying volume information called by both
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the fsd and fsp threads.
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Arguments:
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Irp - Supplies the Irp being processed
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Return Value:
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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 = STATUS_INVALID_PARAMETER;
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );
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ULONG Length;
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TYPE_OF_OPEN TypeOfOpen;
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PFCB Fcb;
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PCCB Ccb;
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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.QueryVolume.Length;
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//
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// Decode the file object and fail if this an unopened file object.
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//
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TypeOfOpen = CdDecodeFileObject( IrpContext, IrpSp->FileObject, &Fcb, &Ccb );
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if (TypeOfOpen == UnopenedFileObject) {
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CdCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
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return STATUS_INVALID_PARAMETER;
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}
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//
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// Acquire the Vcb for this volume.
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//
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CdAcquireVcbShared( IrpContext, Fcb->Vcb, FALSE );
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//
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// Use a try-finally to facilitate cleanup.
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//
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_SEH2_TRY {
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//
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// Verify the Vcb.
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//
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CdVerifyVcb( IrpContext, Fcb->Vcb );
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//
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// Based on the information class we'll do different actions. Each
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// of the procedures that we're calling fills up the output buffer
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// if possible and returns true if it successfully filled the buffer
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// and false if it couldn't wait for any I/O to complete.
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//
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switch (IrpSp->Parameters.QueryVolume.FsInformationClass) {
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case FileFsSizeInformation:
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Status = CdQueryFsSizeInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length );
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break;
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case FileFsVolumeInformation:
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Status = CdQueryFsVolumeInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length );
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break;
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case FileFsDeviceInformation:
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Status = CdQueryFsDeviceInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length );
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break;
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case FileFsAttributeInformation:
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Status = CdQueryFsAttributeInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length );
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break;
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#if (NTDDI_VERSION >= NTDDI_WIN8)
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case FileFsSectorSizeInformation:
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Status = CdQueryFsSectorSizeInfo( IrpContext, Fcb->Vcb, Irp->AssociatedIrp.SystemBuffer, &Length );
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break;
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#endif
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/* ReactOS Change: GCC "enumeration value not handled in switch" */
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default: break;
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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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//
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Irp->IoStatus.Information = IrpSp->Parameters.QueryVolume.Length - Length;
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} _SEH2_FINALLY {
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//
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// Release the Vcb.
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//
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CdReleaseVcb( IrpContext, Fcb->Vcb );
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} _SEH2_END;
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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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//
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// Local support routine
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//
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_Requires_lock_held_(_Global_critical_region_)
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NTSTATUS
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CdQueryFsVolumeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_VOLUME_INFORMATION Buffer,
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_Inout_ PULONG Length
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)
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/*++
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Routine Description:
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This routine implements the query volume info call
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Arguments:
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Vcb - Vcb for this volume.
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Buffer - Supplies a pointer to the output buffer where the information
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is to be returned
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Length - Supplies the length of the buffer in byte. This variable
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upon return recieves the remaining bytes free in the buffer
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Return Value:
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NTSTATUS - Returns the status for the query
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--*/
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{
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ULONG BytesToCopy;
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NTSTATUS Status = STATUS_SUCCESS;
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PAGED_CODE();
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UNREFERENCED_PARAMETER( IrpContext );
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//
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// Fill in the data from the Vcb.
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//
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Buffer->VolumeCreationTime = *((PLARGE_INTEGER) &Vcb->VolumeDasdFcb->CreationTime);
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Buffer->VolumeSerialNumber = Vcb->Vpb->SerialNumber;
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Buffer->SupportsObjects = FALSE;
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*Length -= FIELD_OFFSET( FILE_FS_VOLUME_INFORMATION, VolumeLabel[0] );
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//
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// Check if the buffer we're given is long enough
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//
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if (*Length >= (ULONG) Vcb->Vpb->VolumeLabelLength) {
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BytesToCopy = Vcb->Vpb->VolumeLabelLength;
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} else {
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BytesToCopy = *Length;
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Status = STATUS_BUFFER_OVERFLOW;
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}
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//
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// Copy over what we can of the volume label, and adjust *Length
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//
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Buffer->VolumeLabelLength = BytesToCopy;
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if (BytesToCopy) {
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RtlCopyMemory( &Buffer->VolumeLabel[0],
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&Vcb->Vpb->VolumeLabel[0],
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BytesToCopy );
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}
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*Length -= BytesToCopy;
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//
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// Set our status and return to our caller
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//
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return Status;
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}
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//
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// Local support routine
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//
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NTSTATUS
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CdQueryFsSizeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_SIZE_INFORMATION Buffer,
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_Inout_ PULONG Length
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)
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/*++
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Routine Description:
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This routine implements the query volume size call.
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Arguments:
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Vcb - Vcb for this volume.
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Buffer - Supplies a pointer to the output buffer where the information
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is to be returned
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Length - Supplies the length of the buffer in byte. This variable
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upon return recieves the remaining bytes free in the buffer
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Return Value:
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NTSTATUS - Returns the status for the query
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--*/
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{
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PAGED_CODE();
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UNREFERENCED_PARAMETER( IrpContext );
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//
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// Fill in the output buffer.
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//
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Buffer->TotalAllocationUnits.QuadPart = LlSectorsFromBytes( Vcb->VolumeDasdFcb->AllocationSize.QuadPart );
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Buffer->AvailableAllocationUnits.QuadPart = 0;
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Buffer->SectorsPerAllocationUnit = 1;
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Buffer->BytesPerSector = SECTOR_SIZE;
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//
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// Adjust the length variable
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//
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*Length -= sizeof( FILE_FS_SIZE_INFORMATION );
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//
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// And return success to our caller
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//
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return STATUS_SUCCESS;
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}
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//
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// Local support routine
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//
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NTSTATUS
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CdQueryFsDeviceInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_DEVICE_INFORMATION Buffer,
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_Inout_ PULONG Length
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)
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/*++
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Routine Description:
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This routine implements the query volume device call.
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Arguments:
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Vcb - Vcb for this volume.
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Buffer - Supplies a pointer to the output buffer where the information
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is to be returned
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Length - Supplies the length of the buffer in byte. This variable
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upon return recieves the remaining bytes free in the buffer
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Return Value:
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NTSTATUS - Returns the status for the query
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--*/
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{
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PAGED_CODE();
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UNREFERENCED_PARAMETER( IrpContext );
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//
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// Update the output buffer.
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//
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Buffer->Characteristics = Vcb->TargetDeviceObject->Characteristics;
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Buffer->DeviceType = FILE_DEVICE_CD_ROM;
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//
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// Adjust the length variable
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//
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*Length -= sizeof( FILE_FS_DEVICE_INFORMATION );
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//
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// And return success to our caller
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//
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return STATUS_SUCCESS;
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}
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//
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// Local support routine
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//
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NTSTATUS
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CdQueryFsAttributeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_ PFILE_FS_ATTRIBUTE_INFORMATION Buffer,
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_Inout_ PULONG Length
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)
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/*++
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Routine Description:
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This routine implements the query volume attribute call.
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Arguments:
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Vcb - Vcb for this volume.
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Buffer - Supplies a pointer to the output buffer where the information
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is to be returned
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Length - Supplies the length of the buffer in byte. This variable
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upon return recieves the remaining bytes free in the buffer
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Return Value:
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NTSTATUS - Returns the status for the query
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--*/
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{
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ULONG BytesToCopy;
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NTSTATUS Status = STATUS_SUCCESS;
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PAGED_CODE();
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UNREFERENCED_PARAMETER( Vcb );
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//
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// Fill out the fixed portion of the buffer.
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//
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Buffer->FileSystemAttributes = FILE_CASE_SENSITIVE_SEARCH |
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FILE_READ_ONLY_VOLUME |
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FILE_SUPPORTS_OPEN_BY_FILE_ID;
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if (FlagOn( IrpContext->Vcb->VcbState, VCB_STATE_JOLIET )) {
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SetFlag( Buffer->FileSystemAttributes, FILE_UNICODE_ON_DISK );
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Buffer->MaximumComponentNameLength = 110;
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} else {
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Buffer->MaximumComponentNameLength = 221;
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}
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*Length -= FIELD_OFFSET( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName );
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//
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// Make sure we can copy full unicode characters.
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//
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ClearFlag( *Length, 1 );
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//
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// Determine how much of the file system name will fit.
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//
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if (*Length >= 8) {
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BytesToCopy = 8;
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} else {
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BytesToCopy = *Length;
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Status = STATUS_BUFFER_OVERFLOW;
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}
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*Length -= BytesToCopy;
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//
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// Do the file system name.
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//
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Buffer->FileSystemNameLength = BytesToCopy;
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RtlCopyMemory( &Buffer->FileSystemName[0], L"CDFS", BytesToCopy );
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//
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// And return to our caller
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//
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return Status;
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}
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#if (NTDDI_VERSION >= NTDDI_WIN8)
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NTSTATUS
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CdQueryFsSectorSizeInfo (
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_In_ PIRP_CONTEXT IrpContext,
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_In_ PVCB Vcb,
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_Out_writes_bytes_(*Length) PFILE_FS_SECTOR_SIZE_INFORMATION Buffer,
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_Inout_ PULONG Length
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)
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/*++
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Routine Description:
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This routine implements the query sector size information call
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This operation will work on any handle and requires no privilege.
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Arguments:
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Vcb - Supplies the Vcb being queried
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Buffer - Supplies a pointer to the output buffer where the information
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is to be returned
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Length - Supplies the length of the buffer in byte. This variable
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upon return receives the remaining bytes free in the buffer
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Return Value:
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NTSTATUS - Returns the status for the query
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--*/
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{
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NTSTATUS Status;
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PAGED_CODE();
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UNREFERENCED_PARAMETER( IrpContext );
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//
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// Sufficient buffer size is guaranteed by the I/O manager or the
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// originating kernel mode driver.
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//
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ASSERT( *Length >= sizeof( FILE_FS_SECTOR_SIZE_INFORMATION ));
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_Analysis_assume_( *Length >= sizeof( FILE_FS_SECTOR_SIZE_INFORMATION ));
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//
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// Retrieve the sector size information
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//
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Status = FsRtlGetSectorSizeInformation( Vcb->Vpb->RealDevice,
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Buffer );
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//
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// Adjust the length variable
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//
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if (NT_SUCCESS( Status )) {
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*Length -= sizeof( FILE_FS_SECTOR_SIZE_INFORMATION );
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}
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return Status;
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}
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#endif
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