mirror of
https://github.com/reactos/reactos.git
synced 2024-11-01 12:26:32 +00:00
98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
|
|
* PROJECT: ReactOS Kernel
|
|
* LICENSE: GPL - See COPYING in the top level directory
|
|
* FILE: ntoskrnl/fsrtl/faulttol.c
|
|
* PURPOSE: Provides Fault Tolerance support for File System Drivers
|
|
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
|
|
*/
|
|
|
|
/* INCLUDES ******************************************************************/
|
|
|
|
#include <ntoskrnl.h>
|
|
#include "ntddft.h"
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
/* PUBLIC FUNCTIONS **********************************************************/
|
|
|
|
/*++
|
|
* @name FsRtlBalanceReads
|
|
* @implemented NT 5.2
|
|
*
|
|
* The FsRtlBalanceReads routine sends an IRP to an FTDISK Driver
|
|
* requesting the driver to balance read requests across a mirror set.
|
|
*
|
|
* @param TargetDevice
|
|
* A pointer to an FTDISK Device Object.
|
|
*
|
|
* @return The NTSTATUS error code returned by the FTDISK Driver.
|
|
*
|
|
* @remarks FTDISK is a Software RAID Implementation.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
FsRtlBalanceReads(PDEVICE_OBJECT TargetDevice)
|
|
{
|
|
PIRP Irp;
|
|
KEVENT Event;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
NTSTATUS Status;
|
|
|
|
/* Initialize the Local Event */
|
|
KeInitializeEvent(&Event, NotificationEvent, FALSE);
|
|
|
|
/* Build the special IOCTL */
|
|
Irp = IoBuildDeviceIoControlRequest(FT_BALANCED_READ_MODE,
|
|
TargetDevice,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
FALSE,
|
|
&Event,
|
|
&IoStatusBlock);
|
|
if (!Irp) return STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
/* Send it */
|
|
Status = IoCallDriver(TargetDevice, Irp);
|
|
|
|
/* Wait if needed */
|
|
if (Status == STATUS_PENDING)
|
|
{
|
|
Status = KeWaitForSingleObject(&Event,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL);
|
|
ASSERT(Status == STATUS_SUCCESS);
|
|
|
|
/* Return Status */
|
|
Status = IoStatusBlock.Status;
|
|
}
|
|
|
|
/* Return the status */
|
|
return Status;
|
|
}
|
|
|
|
/*++
|
|
* @name FsRtlSyncVolumes
|
|
* @implemented NT 5.2
|
|
*
|
|
* The FsRtlSyncVolumes routine is deprecated.
|
|
*
|
|
* @return Always returns STATUS_SUCCESS.
|
|
*
|
|
* @remarks Deprecated.
|
|
*
|
|
*--*/
|
|
NTSTATUS
|
|
NTAPI
|
|
FsRtlSyncVolumes(ULONG Unknown0,
|
|
ULONG Unknown1,
|
|
ULONG Unknown2)
|
|
{
|
|
/* Always return success */
|
|
return STATUS_SUCCESS;
|
|
}
|