reactos/rosapps/ext2/blockdev.c

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: services/fs/ext2/blockdev.c
* PURPOSE: Temporary sector reading support
* PROGRAMMER: David Welch (welch@cwcom.net)
* UPDATE HISTORY:
*/
/* INCLUDES *****************************************************************/
#include <ntddk.h>
//#define NDEBUG
#include <debug.h>
#include "ext2fs.h"
/* FUNCTIONS ***************************************************************/
BOOLEAN
Ext2ReadSectors(IN PDEVICE_OBJECT pDeviceObject,
IN ULONG DiskSector,
IN ULONG SectorCount,
IN PVOID Buffer)
{
LARGE_INTEGER sectorNumber;
PIRP irp;
IO_STATUS_BLOCK ioStatus;
KEVENT event;
NTSTATUS status;
ULONG sectorSize;
int j;
DPRINT("VFATReadSector(pDeviceObject %x, DiskSector %d, Buffer %x)\n",
pDeviceObject,DiskSector,Buffer);
sectorNumber.u.HighPart = 0;
sectorNumber.u.LowPart = DiskSector * BLOCKSIZE;
DPRINT("DiskSector:%ld BLKSZ:%ld sectorNumber:%ld:%ld\n",
(unsigned long) DiskSector,
(unsigned long) BLOCKSIZE,
(unsigned long) sectorNumber.u.HighPart,
(unsigned long) sectorNumber.u.LowPart);
KeInitializeEvent(&event, NotificationEvent, FALSE);
sectorSize = BLOCKSIZE*SectorCount;
DPRINT("Building synchronous FSD Request...\n");
irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
pDeviceObject,
Buffer,
sectorSize,
&sectorNumber,
&event,
&ioStatus );
if (!irp)
{
DbgPrint("READ failed!!!\n");
return FALSE;
}
DPRINT("Calling IO Driver...\n");
status = IoCallDriver(pDeviceObject, irp);
DPRINT("Waiting for IO Operation...\n");
if (status == STATUS_PENDING)
{
KeWaitForSingleObject(&event,
Suspended,
KernelMode,
FALSE,
NULL);
DPRINT("Getting IO Status...\n");
status = ioStatus.Status;
}
if (!NT_SUCCESS(status))
{
DbgPrint("IO failed!!! Error code: %d(%x)\n", status, status);
return FALSE;
}
return TRUE;
}
BOOLEAN VFATWriteSectors(IN PDEVICE_OBJECT pDeviceObject,
IN ULONG DiskSector,
IN ULONG SectorCount,
IN UCHAR* Buffer)
{
LARGE_INTEGER sectorNumber;
PIRP irp;
IO_STATUS_BLOCK ioStatus;
KEVENT event;
NTSTATUS status;
ULONG sectorSize;
PULONG mbr;
int j;
DPRINT("VFATWriteSector(pDeviceObject %x, DiskSector %d, Buffer %x)\n",
pDeviceObject,DiskSector,Buffer);
sectorNumber.u.HighPart = 0;
sectorNumber.u.LowPart = DiskSector * BLOCKSIZE;
KeInitializeEvent(&event, NotificationEvent, FALSE);
sectorSize = BLOCKSIZE*SectorCount;
DPRINT("Building synchronous FSD Request...\n");
irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
pDeviceObject,
Buffer,
sectorSize,
&sectorNumber,
&event,
&ioStatus );
if (!irp) {
DbgPrint("WRITE failed!!!\n");
return FALSE;
}
DPRINT("Calling IO Driver...\n");
status = IoCallDriver(pDeviceObject,
irp);
DPRINT("Waiting for IO Operation...\n");
if (status == STATUS_PENDING) {
KeWaitForSingleObject(&event,
Suspended,
KernelMode,
FALSE,
NULL);
DPRINT("Getting IO Status...\n");
status = ioStatus.Status;
}
if (!NT_SUCCESS(status)) {
DbgPrint("IO failed!!! Error code: %d(%x)\n", status, status);
return FALSE;
}
ExFreePool(mbr);
DPRINT("Block request succeeded\n");
return TRUE;
}