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NT4/private/ntos/cntfs/volinfo.c

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First commit
2001-01-01 00:00:00 +01:00
/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
VolInfo.c
Abstract:
This module implements the set and query volume information routines for
Ntfs called by the dispatch driver.
Author:
Your Name [Email] dd-Mon-Year
Revision History:
--*/
#include "NtfsProc.h"
//
// The local debug trace level
//
#define Dbg (DEBUG_TRACE_VOLINFO)
//
// Local procedure prototypes
//
NTSTATUS
NtfsQueryFsVolumeInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_VOLUME_INFORMATION Buffer,
IN OUT PULONG Length
);
NTSTATUS
NtfsQueryFsSizeInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_SIZE_INFORMATION Buffer,
IN OUT PULONG Length
);
NTSTATUS
NtfsQueryFsDeviceInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_DEVICE_INFORMATION Buffer,
IN OUT PULONG Length
);
NTSTATUS
NtfsQueryFsAttributeInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_ATTRIBUTE_INFORMATION Buffer,
IN OUT PULONG Length
);
NTSTATUS
NtfsQueryFsControlInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_CONTROL_INFORMATION Buffer,
IN OUT PULONG Length
);
NTSTATUS
NtfsSetFsLabelInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_LABEL_INFORMATION Buffer
);
NTSTATUS
NtfsSetFsControlInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_CONTROL_INFORMATION Buffer
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, NtfsCommonQueryVolumeInfo)
#pragma alloc_text(PAGE, NtfsCommonSetVolumeInfo)
#pragma alloc_text(PAGE, NtfsFsdQueryVolumeInformation)
#pragma alloc_text(PAGE, NtfsFsdSetVolumeInformation)
#pragma alloc_text(PAGE, NtfsQueryFsAttributeInfo)
#pragma alloc_text(PAGE, NtfsQueryFsDeviceInfo)
#pragma alloc_text(PAGE, NtfsQueryFsSizeInfo)
#pragma alloc_text(PAGE, NtfsQueryFsVolumeInfo)
#pragma alloc_text(PAGE, NtfsQueryFsControlInfo)
#pragma alloc_text(PAGE, NtfsSetFsLabelInfo)
#pragma alloc_text(PAGE, NtfsSetFsControlInfo)
#endif
NTSTATUS
NtfsFsdQueryVolumeInformation (
IN PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine implements the FSD part of query Volume Information.
Arguments:
VolumeDeviceObject - Supplies the volume device object where the
file exists
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The FSD status for the IRP
--*/
{
TOP_LEVEL_CONTEXT TopLevelContext;
PTOP_LEVEL_CONTEXT ThreadTopLevelContext;
NTSTATUS Status = STATUS_SUCCESS;
PIRP_CONTEXT IrpContext = NULL;
UNREFERENCED_PARAMETER( VolumeDeviceObject );
ASSERT_IRP( Irp );
PAGED_CODE();
DebugTrace( +1, Dbg, ("NtfsFsdQueryVolumeInformation\n") );
//
// Call the common query Volume Information routine
//
FsRtlEnterFileSystem();
ThreadTopLevelContext = NtfsSetTopLevelIrp( &TopLevelContext, FALSE, FALSE );
do {
try {
//
// We are either initiating this request or retrying it.
//
if (IrpContext == NULL) {
IrpContext = NtfsCreateIrpContext( Irp, CanFsdWait( Irp ) );
NtfsUpdateIrpContextWithTopLevel( IrpContext, ThreadTopLevelContext );
} else if (Status == STATUS_LOG_FILE_FULL) {
NtfsCheckpointForLogFileFull( IrpContext );
}
Status = NtfsCommonQueryVolumeInfo( IrpContext, Irp );
break;
} except(NtfsExceptionFilter( IrpContext, GetExceptionInformation() )) {
//
// We had some trouble trying to perform the requested
// operation, so we'll abort the I/O request with
// the error status that we get back from the
// execption code
//
Status = NtfsProcessException( IrpContext, Irp, GetExceptionCode() );
}
} while (Status == STATUS_CANT_WAIT ||
Status == STATUS_LOG_FILE_FULL);
if (ThreadTopLevelContext == &TopLevelContext) {
NtfsRestoreTopLevelIrp( ThreadTopLevelContext );
}
FsRtlExitFileSystem();
//
// And return to our caller
//
DebugTrace( -1, Dbg, ("NtfsFsdQueryVolumeInformation -> %08lx\n", Status) );
return Status;
}
NTSTATUS
NtfsFsdSetVolumeInformation (
IN PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine implements the FSD part of set Volume Information.
Arguments:
VolumeDeviceObject - Supplies the volume device object where the
file exists
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The FSD status for the IRP
--*/
{
TOP_LEVEL_CONTEXT TopLevelContext;
PTOP_LEVEL_CONTEXT ThreadTopLevelContext;
NTSTATUS Status = STATUS_SUCCESS;
PIRP_CONTEXT IrpContext = NULL;
UNREFERENCED_PARAMETER( VolumeDeviceObject );
ASSERT_IRP( Irp );
PAGED_CODE();
DebugTrace( +1, Dbg, ("NtfsFsdSetVolumeInformation\n") );
//
// Call the common set Volume Information routine
//
FsRtlEnterFileSystem();
ThreadTopLevelContext = NtfsSetTopLevelIrp( &TopLevelContext, FALSE, FALSE );
do {
try {
//
// We are either initiating this request or retrying it.
//
if (IrpContext == NULL) {
IrpContext = NtfsCreateIrpContext( Irp, CanFsdWait( Irp ) );
NtfsUpdateIrpContextWithTopLevel( IrpContext, ThreadTopLevelContext );
} else if (Status == STATUS_LOG_FILE_FULL) {
NtfsCheckpointForLogFileFull( IrpContext );
}
Status = NtfsCommonSetVolumeInfo( IrpContext, Irp );
break;
} except(NtfsExceptionFilter( IrpContext, GetExceptionInformation() )) {
//
// We had some trouble trying to perform the requested
// operation, so we'll abort the I/O request with
// the error status that we get back from the
// execption code
//
Status = NtfsProcessException( IrpContext, Irp, GetExceptionCode() );
}
} while (Status == STATUS_CANT_WAIT ||
Status == STATUS_LOG_FILE_FULL);
if (ThreadTopLevelContext == &TopLevelContext) {
NtfsRestoreTopLevelIrp( ThreadTopLevelContext );
}
FsRtlExitFileSystem();
//
// And return to our caller
//
DebugTrace( -1, Dbg, ("NtfsFsdSetVolumeInformation -> %08lx\n", Status) );
return Status;
}
NTSTATUS
NtfsCommonQueryVolumeInfo (
IN PIRP_CONTEXT IrpContext,
IN PIRP Irp
)
/*++
Routine Description:
This is the common routine for query Volume Information called by both the
fsd and fsp threads.
Arguments:
Irp - Supplies the Irp to process
Return Value:
NTSTATUS - The return status for the operation
--*/
{
NTSTATUS Status;
PIO_STACK_LOCATION IrpSp;
PFILE_OBJECT FileObject;
TYPE_OF_OPEN TypeOfOpen;
PVCB Vcb;
PFCB Fcb;
PSCB Scb;
PCCB Ccb;
ULONG Length;
FS_INFORMATION_CLASS FsInformationClass;
PVOID Buffer;
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_IRP( Irp );
PAGED_CODE();
//
// Get the current stack location
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
DebugTrace( +1, Dbg, ("NtfsCommonQueryVolumeInfo...\n") );
DebugTrace( 0, Dbg, ("IrpContext = %08lx\n", IrpContext) );
DebugTrace( 0, Dbg, ("Irp = %08lx\n", Irp) );
DebugTrace( 0, Dbg, ("Length = %08lx\n", IrpSp->Parameters.QueryVolume.Length) );
DebugTrace( 0, Dbg, ("FsInformationClass = %08lx\n", IrpSp->Parameters.QueryVolume.FsInformationClass) );
DebugTrace( 0, Dbg, ("Buffer = %08lx\n", Irp->AssociatedIrp.SystemBuffer) );
//
// Reference our input parameters to make things easier
//
Length = IrpSp->Parameters.QueryVolume.Length;
FsInformationClass = IrpSp->Parameters.QueryVolume.FsInformationClass;
Buffer = Irp->AssociatedIrp.SystemBuffer;
//
// Extract and decode the file object to get the Vcb, we don't really
// care what the type of open is.
//
FileObject = IrpSp->FileObject;
TypeOfOpen = NtfsDecodeFileObject( IrpContext, FileObject, &Vcb, &Fcb, &Scb, &Ccb, TRUE );
//
// We need exclusive access to the Vcb because we are going to verify
// it. After we verify the vcb we'll convert our access to shared
//
NtfsAcquireSharedVcb( IrpContext, Vcb, FALSE );
try {
//
// Based on the information class we'll do different actions. Each
// of the procedures that we're calling fills up the output buffer
// if possible and returns true if it successfully filled the buffer
// and false if it couldn't wait for any I/O to complete.
//
switch (FsInformationClass) {
case FileFsVolumeInformation:
Status = NtfsQueryFsVolumeInfo( IrpContext, Vcb, Buffer, &Length );
break;
case FileFsSizeInformation:
Status = NtfsQueryFsSizeInfo( IrpContext, Vcb, Buffer, &Length );
break;
case FileFsDeviceInformation:
Status = NtfsQueryFsDeviceInfo( IrpContext, Vcb, Buffer, &Length );
break;
case FileFsAttributeInformation:
Status = NtfsQueryFsAttributeInfo( IrpContext, Vcb, Buffer, &Length );
break;
#ifdef _CAIRO_
case FileFsControlInformation:
Status = NtfsQueryFsControlInfo( IrpContext, Vcb, Buffer, &Length );
break;
case FileFsQuotaQueryInformation:
Status = NtfsFsQuotaQueryInfo( IrpContext, Vcb, Buffer, &Length );
break;
#endif // _CAIRO_
default:
Status = STATUS_INVALID_PARAMETER;
break;
}
//
// Set the information field to the number of bytes actually filled in
//
Irp->IoStatus.Information = IrpSp->Parameters.QueryVolume.Length - Length;
//
// Abort transaction on error by raising.
//
NtfsCleanupTransaction( IrpContext, Status, FALSE );
} finally {
DebugUnwind( NtfsCommonQueryVolumeInfo );
NtfsReleaseVcb( IrpContext, Vcb );
if (!AbnormalTermination()) {
NtfsCompleteRequest( &IrpContext, &Irp, Status );
}
DebugTrace( -1, Dbg, ("NtfsCommonQueryVolumeInfo -> %08lx\n", Status) );
}
return Status;
}
NTSTATUS
NtfsCommonSetVolumeInfo (
IN PIRP_CONTEXT IrpContext,
IN PIRP Irp
)
/*++
Routine Description:
This is the common routine for set Volume Information called by both the
fsd and fsp threads.
Arguments:
Irp - Supplies the Irp to process
Return Value:
NTSTATUS - The return status for the operation
--*/
{
NTSTATUS Status;
PIO_STACK_LOCATION IrpSp;
PFILE_OBJECT FileObject;
TYPE_OF_OPEN TypeOfOpen;
PVCB Vcb;
PFCB Fcb;
PSCB Scb;
PCCB Ccb;
ULONG Length;
FS_INFORMATION_CLASS FsInformationClass;
PVOID Buffer;
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_IRP( Irp );
PAGED_CODE();
//
// Get the current Irp stack location
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
DebugTrace( +1, Dbg, ("NtfsCommonSetVolumeInfo\n") );
DebugTrace( 0, Dbg, ("IrpContext = %08lx\n", IrpContext) );
DebugTrace( 0, Dbg, ("Irp = %08lx\n", Irp) );
DebugTrace( 0, Dbg, ("Length = %08lx\n", IrpSp->Parameters.SetVolume.Length) );
DebugTrace( 0, Dbg, ("FsInformationClass = %08lx\n", IrpSp->Parameters.SetVolume.FsInformationClass) );
DebugTrace( 0, Dbg, ("Buffer = %08lx\n", Irp->AssociatedIrp.SystemBuffer) );
//
// Reference our input parameters to make things easier
//
Length = IrpSp->Parameters.SetVolume.Length;
FsInformationClass = IrpSp->Parameters.SetVolume.FsInformationClass;
Buffer = Irp->AssociatedIrp.SystemBuffer;
//
// Extract and decode the file object to get the Vcb, we don't really
// care what the type of open is.
//
FileObject = IrpSp->FileObject;
TypeOfOpen = NtfsDecodeFileObject( IrpContext, FileObject, &Vcb, &Fcb, &Scb, &Ccb, TRUE );
if (TypeOfOpen != UserVolumeOpen) {
NtfsCompleteRequest( &IrpContext, &Irp, STATUS_ACCESS_DENIED );
DebugTrace( -1, Dbg, ("NtfsCommonSetVolumeInfo -> STATUS_ACCESS_DENIED\n") );
return STATUS_ACCESS_DENIED;
}
//
// Acquire exclusive access to the Vcb
//
NtfsAcquireExclusiveVcb( IrpContext, Vcb, TRUE );
try {
//
// Proceed only if the volume is mounted.
//
if (FlagOn( Vcb->VcbState, VCB_STATE_VOLUME_MOUNTED )) {
//
// Based on the information class we'll do different actions. Each
// of the procedures that we're calling performs the action if
// possible and returns true if it successful and false if it couldn't
// wait for any I/O to complete.
//
switch (FsInformationClass) {
case FileFsLabelInformation:
Status = NtfsSetFsLabelInfo( IrpContext, Vcb, Buffer );
break;
#ifdef _CAIRO_
case FileFsQuotaSetInformation:
Status = NtfsFsQuotaSetInfo( IrpContext, Vcb, Buffer, Length );
break;
case FileFsControlInformation:
Status = NtfsSetFsControlInfo( IrpContext, Vcb, Buffer );
break;
#endif // _CAIRO_
default:
Status = STATUS_INVALID_PARAMETER;
break;
}
} else {
Status = STATUS_FILE_INVALID;
}
//
// Abort transaction on error by raising.
//
NtfsCleanupTransaction( IrpContext, Status, FALSE );
} finally {
DebugUnwind( NtfsCommonSetVolumeInfo );
NtfsReleaseVcb( IrpContext, Vcb );
if (!AbnormalTermination()) {
NtfsCompleteRequest( &IrpContext, &Irp, Status );
}
DebugTrace( -1, Dbg, ("NtfsCommonSetVolumeInfo -> %08lx\n", Status) );
}
return Status;
}
//
// Internal Support Routine
//
NTSTATUS
NtfsQueryFsVolumeInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_VOLUME_INFORMATION Buffer,
IN OUT PULONG Length
)
/*++
Routine Description:
This routine implements the query volume info call
Arguments:
Vcb - Supplies the Vcb being queried
Buffer - Supplies a pointer to the output buffer where the information
is to be returned
Length - Supplies the length of the buffer in byte. This variable
upon return recieves the remaining bytes free in the buffer
Return Value:
NTSTATUS - Returns the status for the query
--*/
{
NTSTATUS Status;
ULONG BytesToCopy;
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_VCB( Vcb );
PAGED_CODE();
DebugTrace( 0, Dbg, ("NtfsQueryFsVolumeInfo...\n") );
//
// Get the volume creation time from the Vcb.
//
Buffer->VolumeCreationTime.QuadPart = Vcb->VolumeCreationTime;
//
// Fill in the serial number and indicate that we support objects
//
Buffer->VolumeSerialNumber = Vcb->Vpb->SerialNumber;
Buffer->SupportsObjects = TRUE;
Buffer->VolumeLabelLength = Vcb->Vpb->VolumeLabelLength;
//
// Update the length field with how much we have filled in so far.
//
*Length -= FIELD_OFFSET(FILE_FS_VOLUME_INFORMATION, VolumeLabel[0]);
//
// See how many bytes of volume label we can copy
//
if (*Length >= (ULONG)Vcb->Vpb->VolumeLabelLength) {
Status = STATUS_SUCCESS;
BytesToCopy = Vcb->Vpb->VolumeLabelLength;
} else {
Status = STATUS_BUFFER_OVERFLOW;
BytesToCopy = *Length;
}
//
// Copy over the volume label (if there is one).
//
RtlCopyMemory( &Buffer->VolumeLabel[0],
&Vcb->Vpb->VolumeLabel[0],
BytesToCopy);
//
// Update the buffer length by the amount we copied.
//
*Length -= BytesToCopy;
return Status;
}
//
// Internal Support Routine
//
NTSTATUS
NtfsQueryFsSizeInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_SIZE_INFORMATION Buffer,
IN OUT PULONG Length
)
/*++
Routine Description:
This routine implements the query size information call
Arguments:
Vcb - Supplies the Vcb being queried
Buffer - Supplies a pointer to the output buffer where the information
is to be returned
Length - Supplies the length of the buffer in byte. This variable
upon return recieves the remaining bytes free in the buffer
Return Value:
NTSTATUS - Returns the status for the query
--*/
{
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_VCB( Vcb );
PAGED_CODE();
DebugTrace( 0, Dbg, ("NtfsQueryFsSizeInfo...\n") );
//
// Make sure the buffer is large enough and zero it out
//
if (*Length < sizeof(FILE_FS_SIZE_INFORMATION)) {
return STATUS_BUFFER_OVERFLOW;
}
RtlZeroMemory( Buffer, sizeof(FILE_FS_SIZE_INFORMATION) );
//
// Check if we need to rescan the bitmap. Don't try this
// if we have started to teardown the volume.
//
if (FlagOn( Vcb->VcbState, VCB_STATE_RELOAD_FREE_CLUSTERS ) &&
FlagOn( Vcb->VcbState, VCB_STATE_VOLUME_MOUNTED )) {
//
// Acquire the volume bitmap shared to rescan the bitmap.
//
NtfsAcquireExclusiveScb( IrpContext, Vcb->BitmapScb );
try {
NtfsScanEntireBitmap( IrpContext, Vcb, TRUE );
} finally {
NtfsReleaseScb( IrpContext, Vcb->BitmapScb );
}
}
//
// Set the output buffer
//
Buffer->TotalAllocationUnits.QuadPart = Vcb->TotalClusters;
Buffer->AvailableAllocationUnits.QuadPart = Vcb->FreeClusters;
Buffer->SectorsPerAllocationUnit = Vcb->BytesPerCluster / Vcb->BytesPerSector;
Buffer->BytesPerSector = Vcb->BytesPerSector;
#ifdef _CAIRO_
//
// If quota enforcement is enabled then the availalble allocation
// units. must be reduced by the available quota.
//
if (FlagOn(Vcb->QuotaFlags, QUOTA_FLAG_TRACKING_ENABLED)) {
PCCB Ccb;
//
// Go grab the ccb out of the Irp.
//
Ccb = (PCCB) (IoGetCurrentIrpStackLocation(IrpContext->OriginatingIrp)->
FileObject->FsContext2);
if (Ccb != NULL && Ccb->OwnerId != 0) {
ULONGLONG Quota;
NtfsGetRemainingQuota( IrpContext, Ccb->OwnerId, &Quota, NULL );
Quota = LlClustersFromBytesTruncate( Vcb, Quota );
if (Quota < (ULONGLONG) Vcb->FreeClusters) {
Buffer->AvailableAllocationUnits.QuadPart = Quota;
}
}
}
#endif // _CAIRO_
//
// Adjust the length variable
//
*Length -= sizeof(FILE_FS_SIZE_INFORMATION);
return STATUS_SUCCESS;
}
//
// Internal Support Routine
//
NTSTATUS
NtfsQueryFsDeviceInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_DEVICE_INFORMATION Buffer,
IN OUT PULONG Length
)
/*++
Routine Description:
This routine implements the query device information call
Arguments:
Vcb - Supplies the Vcb being queried
Buffer - Supplies a pointer to the output buffer where the information
is to be returned
Length - Supplies the length of the buffer in byte. This variable
upon return recieves the remaining bytes free in the buffer
Return Value:
NTSTATUS - Returns the status for the query
--*/
{
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_VCB( Vcb );
PAGED_CODE();
DebugTrace( 0, Dbg, ("NtfsQueryFsDeviceInfo...\n") );
//
// Make sure the buffer is large enough and zero it out
//
if (*Length < sizeof(FILE_FS_DEVICE_INFORMATION)) {
return STATUS_BUFFER_OVERFLOW;
}
RtlZeroMemory( Buffer, sizeof(FILE_FS_DEVICE_INFORMATION) );
//
// Set the output buffer
//
Buffer->DeviceType = FILE_DEVICE_DISK;
Buffer->Characteristics = Vcb->TargetDeviceObject->Characteristics;
//
// Adjust the length variable
//
*Length -= sizeof(FILE_FS_DEVICE_INFORMATION);
return STATUS_SUCCESS;
}
//
// Internal Support Routine
//
NTSTATUS
NtfsQueryFsAttributeInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_ATTRIBUTE_INFORMATION Buffer,
IN OUT PULONG Length
)
/*++
Routine Description:
This routine implements the query attribute information call
Arguments:
Vcb - Supplies the Vcb being queried
Buffer - Supplies a pointer to the output buffer where the information
is to be returned
Length - Supplies the length of the buffer in byte. This variable
upon return recieves the remaining bytes free in the buffer
Return Value:
NTSTATUS - Returns the status for the query
--*/
{
NTSTATUS Status;
ULONG BytesToCopy;
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_VCB( Vcb );
PAGED_CODE();
DebugTrace( 0, Dbg, ("NtfsQueryFsAttributeInfo...\n") );
//
// See how many bytes of the name we can copy.
//
*Length -= FIELD_OFFSET(FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName[0]);
if ( *Length >= 8 ) {
Status = STATUS_SUCCESS;
BytesToCopy = 8;
} else {
Status = STATUS_BUFFER_OVERFLOW;
BytesToCopy = *Length;
}
//
// Set the output buffer
//
Buffer->FileSystemAttributes = FILE_CASE_SENSITIVE_SEARCH |
FILE_CASE_PRESERVED_NAMES |
FILE_UNICODE_ON_DISK |
FILE_FILE_COMPRESSION |
FILE_PERSISTENT_ACLS;
//
// Clear the compression flag if we don't allow compression on this drive
// (i.e. large clusters)
//
if (!FlagOn( Vcb->AttributeFlagsMask, ATTRIBUTE_FLAG_COMPRESSION_MASK )) {
ClearFlag( Buffer->FileSystemAttributes, FILE_FILE_COMPRESSION );
}
Buffer->MaximumComponentNameLength = 255;
Buffer->FileSystemNameLength = BytesToCopy;;
RtlCopyMemory( &Buffer->FileSystemName[0], L"NTFS", BytesToCopy );
//
// Adjust the length variable
//
*Length -= BytesToCopy;
return Status;
}
#ifdef _CAIRO_
//
// Internal Support Routine
//
NTSTATUS
NtfsQueryFsControlInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_CONTROL_INFORMATION Buffer,
IN OUT PULONG Length
)
/*++
Routine Description:
This routine implements the query control information call
Arguments:
Vcb - Supplies the Vcb being queried
Buffer - Supplies a pointer to the output buffer where the information
is to be returned
Length - Supplies the length of the buffer in byte. This variable
upon return recieves the remaining bytes free in the buffer
Return Value:
NTSTATUS - Returns the status for the query
--*/
{
INDEX_ROW IndexRow;
INDEX_KEY IndexKey;
QUOTA_USER_DATA QuotaBuffer;
PQUOTA_USER_DATA UserData;
ULONG OwnerId;
ULONG Count = 1;
PREAD_CONTEXT ReadContext = NULL;
NTSTATUS Status = STATUS_SUCCESS;
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_VCB( Vcb );
PAGED_CODE();
DebugTrace( 0, Dbg, ("NtfsQueryFsControlInfo...\n") );
RtlZeroMemory( Buffer, sizeof( FILE_FS_CONTROL_INFORMATION ));
PAGED_CODE();
try {
//
// Fill in the quota information if quotas are running.
//
if (Vcb->QuotaTableScb != NULL) {
OwnerId = QUOTA_DEFAULTS_ID;
IndexKey.KeyLength = sizeof( OwnerId );
IndexKey.Key = &OwnerId;
Status = NtOfsReadRecords( IrpContext,
Vcb->QuotaTableScb,
&ReadContext,
&IndexKey,
NtOfsMatchUlongExact,
&IndexKey,
&Count,
&IndexRow,
sizeof( QuotaBuffer ),
&QuotaBuffer );
if (NT_SUCCESS( Status )) {
UserData = IndexRow.DataPart.Data;
Buffer->DefaultQuotaThreshold.QuadPart =
UserData->QuotaThreshold;
Buffer->DefaultQuotaLimit.QuadPart =
UserData->QuotaLimit;
//
// If the quota info is corrupt or has not been rebuilt
// yet then indicate the information is incomplete.
//
if (FlagOn( Vcb->QuotaFlags, QUOTA_FLAG_OUT_OF_DATE |
QUOTA_FLAG_CORRUPT )) {
SetFlag( Buffer->FileSystemControlFlags,
FILE_VC_QUOTAS_INCOMPLETE );
}
if ((Vcb->QuotaState & VCB_QUOTA_REPAIR_RUNNING) >
VCB_QUOTA_REPAIR_POSTED ) {
SetFlag( Buffer->FileSystemControlFlags,
FILE_VC_QUOTAS_REBUILDING );
}
//
// Set the quota information basied on where we want
// to be rather than where we are.
//
if (FlagOn( UserData->QuotaFlags,
QUOTA_FLAG_ENFORCEMENT_ENABLED )) {
SetFlag( Buffer->FileSystemControlFlags,
FILE_VC_QUOTA_ENFORCE );
} else if (FlagOn( UserData->QuotaFlags,
QUOTA_FLAG_TRACKING_REQUESTED )) {
SetFlag( Buffer->FileSystemControlFlags,
FILE_VC_QUOTA_TRACK );
}
if (FlagOn( UserData->QuotaFlags, QUOTA_FLAG_LOG_LIMIT)) {
SetFlag( Buffer->FileSystemControlFlags,
FILE_VC_LOG_QUOTA_LIMIT );
}
if (FlagOn( UserData->QuotaFlags, QUOTA_FLAG_LOG_THRESHOLD)) {
SetFlag( Buffer->FileSystemControlFlags,
FILE_VC_LOG_QUOTA_THRESHOLD );
}
}
}
} finally {
if (ReadContext != NULL) {
NtOfsFreeReadContext( ReadContext );
}
}
//
// Adjust the length variable
//
*Length -= sizeof( FILE_FS_CONTROL_INFORMATION );
return Status;
}
//
// Internal Support Routine
//
NTSTATUS
NtfsSetFsControlInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_CONTROL_INFORMATION Buffer
)
/*++
Routine Description:
This routine implements the set label call
Arguments:
Vcb - Supplies the Vcb being altered
Buffer - Supplies a pointer to the input buffer containing the new label
Return Value:
NTSTATUS - Returns the status for the operation
--*/
{
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_VCB( Vcb );
PAGED_CODE();
if (Vcb->QuotaTableScb == NULL) {
return( STATUS_INVALID_PARAMETER );
}
//
// Process the quota part of the control structure.
//
NtfsUpdateQuotaDefaults( IrpContext, Vcb, Buffer );
return STATUS_SUCCESS;
}
#endif // _CAIRO_
//
// Internal Support Routine
//
NTSTATUS
NtfsSetFsLabelInfo (
IN PIRP_CONTEXT IrpContext,
IN PVCB Vcb,
IN PFILE_FS_LABEL_INFORMATION Buffer
)
/*++
Routine Description:
This routine implements the set label call
Arguments:
Vcb - Supplies the Vcb being altered
Buffer - Supplies a pointer to the input buffer containing the new label
Return Value:
NTSTATUS - Returns the status for the operation
--*/
{
ATTRIBUTE_ENUMERATION_CONTEXT AttributeContext;
ASSERT_IRP_CONTEXT( IrpContext );
ASSERT_VCB( Vcb );
PAGED_CODE();
DebugTrace( 0, Dbg, ("NtfsSetFsLabelInfo...\n") );
//
// Check that the volume label length is supported by the system.
//
if (Buffer->VolumeLabelLength > MAXIMUM_VOLUME_LABEL_LENGTH) {
return STATUS_INVALID_VOLUME_LABEL;
}
try {
//
// Initialize the attribute context and then lookup the volume name
// attribute for on the volume dasd file
//
NtfsInitializeAttributeContext( &AttributeContext );
if (NtfsLookupAttributeByCode( IrpContext,
Vcb->VolumeDasdScb->Fcb,
&Vcb->VolumeDasdScb->Fcb->FileReference,
$VOLUME_NAME,
&AttributeContext )) {
//
// We found the volume name so now simply update the label
//
NtfsChangeAttributeValue( IrpContext,
Vcb->VolumeDasdScb->Fcb,
0,
&Buffer->VolumeLabel[0],
Buffer->VolumeLabelLength,
TRUE,
FALSE,
FALSE,
FALSE,
&AttributeContext );
} else {
//
// We didn't find the volume name so now create a new label
//
NtfsCleanupAttributeContext( &AttributeContext );
NtfsInitializeAttributeContext( &AttributeContext );
NtfsCreateAttributeWithValue( IrpContext,
Vcb->VolumeDasdScb->Fcb,
$VOLUME_NAME,
NULL,
&Buffer->VolumeLabel[0],
Buffer->VolumeLabelLength,
0, // Attributeflags
NULL,
TRUE,
&AttributeContext );
}
Vcb->Vpb->VolumeLabelLength = (USHORT)Buffer->VolumeLabelLength;
if ( Vcb->Vpb->VolumeLabelLength > MAXIMUM_VOLUME_LABEL_LENGTH) {
Vcb->Vpb->VolumeLabelLength = MAXIMUM_VOLUME_LABEL_LENGTH;
}
RtlCopyMemory( &Vcb->Vpb->VolumeLabel[0],
&Buffer->VolumeLabel[0],
Vcb->Vpb->VolumeLabelLength );
} finally {
DebugUnwind( NtfsSetFsLabelInfo );
NtfsCleanupAttributeContext( &AttributeContext );
}
//
// and return to our caller
//
return STATUS_SUCCESS;
}
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