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97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/fsrtl/faulttol.c
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* PURPOSE: Provides Fault Tolerance support for File System Drivers
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#include "ntddft.h"
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#define NDEBUG
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#include <debug.h>
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/* PUBLIC FUNCTIONS **********************************************************/
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/*++
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* @name FsRtlBalanceReads
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* @implemented NT 5.2
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*
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* The FsRtlBalanceReads routine sends an IRP to an FTDISK Driver
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* requesting the driver to balance read requests across a mirror set.
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*
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* @param TargetDevice
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* A pointer to an FTDISK Device Object.
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*
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* @return The NTSTATUS error code returned by the FTDISK Driver.
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*
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* @remarks FTDISK is a Software RAID Implementation.
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*
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*--*/
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NTSTATUS
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NTAPI
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FsRtlBalanceReads(PDEVICE_OBJECT TargetDevice)
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{
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PIRP Irp;
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KEVENT Event;
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IO_STATUS_BLOCK IoStatusBlock;
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NTSTATUS Status;
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/* Initialize the Local Event */
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KeInitializeEvent(&Event, NotificationEvent, FALSE);
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/* Build the special IOCTL */
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Irp = IoBuildDeviceIoControlRequest(FT_BALANCED_READ_MODE,
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TargetDevice,
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NULL,
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0,
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NULL,
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0,
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FALSE,
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&Event,
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&IoStatusBlock);
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if (!Irp) return STATUS_INSUFFICIENT_RESOURCES;
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/* Send it */
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Status = IoCallDriver(TargetDevice, Irp);
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/* Wait if needed */
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if (Status == STATUS_PENDING)
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{
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Status = KeWaitForSingleObject(&Event,
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Executive,
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KernelMode,
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FALSE,
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NULL);
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ASSERT(Status == STATUS_SUCCESS);
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/* Return Status */
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Status = IoStatusBlock.Status;
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}
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/* Return the status */
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return Status;
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}
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/*++
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* @name FsRtlSyncVolumes
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* @implemented NT 5.2
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*
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* The FsRtlSyncVolumes routine is deprecated.
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*
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* @return Always returns STATUS_SUCCESS.
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*
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* @remarks Deprecated.
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*
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*--*/
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NTSTATUS
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NTAPI
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FsRtlSyncVolumes(ULONG Unknown0,
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ULONG Unknown1,
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ULONG Unknown2)
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{
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/* Always return success */
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return STATUS_SUCCESS;
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}
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